Attachment 5963 Details for Bug 13841 – file.shar

file.shar

file.shar (text/plain), 367.97 KB, created by ob on 1999-09-20 00:30:02 UTC

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Creator: ob

Created: 1999-09-20 00:30:02 UTC

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obsolete

># This is a shell archive.  Save it in a file, remove anything before
># this line, and then unpack it by entering "sh file".  Note, it may
># create directories; files and directories will be owned by you and
># have default permissions.
>#
># This archive contains:
>#
>#	.
>#	./usr
>#	./usr/include
>#	./usr/include/net
>#	./usr/include/net/if_sppp.h
>#	./usr/include/net/if_sppp.h.orig
>#	./usr/include/net/if_sppp.h.patch
>#	./usr/src
>#	./usr/src/sys
>#	./usr/src/sys/net
>#	./usr/src/sys/net/if_sppp.h
>#	./usr/src/sys/net/if_sppp.h.orig
>#	./usr/src/sys/net/if_sppp.h.patch
>#	./usr/src/sys/net/if_spppsubr.c
>#	./usr/src/sys/net/if_spppsubr.c.patch
>#	./usr/src/sys/net/if_spppsubr.c.orig
>#	./usr/src/sys/i4b
>#	./usr/src/sys/i4b/driver
>#	./usr/src/sys/i4b/driver/i4b_isppp.c
>#	./usr/src/sys/i4b/driver/i4b_isppp.c.patch
>#	./usr/src/sys/i4b/driver/i4b_isppp.c.orig
>#	./usr/src/sys/i4b/layer4
>#	./usr/src/sys/i4b/layer4/i4b_l4.c
>#	./usr/src/sys/i4b/layer4/i4b_l4.c.patch
>#	./usr/src/sys/i4b/layer4/i4b_l4.c.orig
>#	./usr/src/sbin
>#	./usr/src/sbin/spppcontrol
>#	./usr/src/sbin/spppcontrol/Makefile
>#	./usr/src/sbin/spppcontrol/spppcontrol.1
>#	./usr/src/sbin/spppcontrol/spppcontrol.c
>#	./usr/src/sbin/spppcontrol/spppcontrol.c.patch
>#	./usr/src/sbin/spppcontrol/spppcontrol.c.orig
>#
>echo c - .
>mkdir -p . > /dev/null 2>&1
>echo c - ./usr
>mkdir -p ./usr > /dev/null 2>&1
>echo c - ./usr/include
>mkdir -p ./usr/include > /dev/null 2>&1
>echo c - ./usr/include/net
>mkdir -p ./usr/include/net > /dev/null 2>&1
>echo x - ./usr/include/net/if_sppp.h
>sed 's/^X//' >./usr/include/net/if_sppp.h << 'END-of-./usr/include/net/if_sppp.h'
>X/*
>X * Defines for synchronous PPP/Cisco link level subroutines.
>X *
>X * Copyright (C) 1994 Cronyx Ltd.
>X * Author: Serge Vakulenko, <vak@cronyx.ru>
>X *
>X * Heavily revamped to conform to RFC 1661.
>X * Copyright (C) 1997, Joerg Wunsch.
>X *
>X * This software is distributed with NO WARRANTIES, not even the implied
>X * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>X *
>X * Authors grant any other persons or organizations permission to use
>X * or modify this software as long as this message is kept with the software,
>X * all derivative works or modified versions.
>X *
>X * From: Version 2.0, Fri Oct  6 20:39:21 MSK 1995
>X *
>X * $Id: if_sppp.h,v 1.13 1998/12/27 21:30:44 phk Exp $
>X */
>X
>X#ifndef _NET_IF_SPPP_H_
>X#define _NET_IF_SPPP_H_ 1
>X
>X#define IDX_LCP 0		/* idx into state table */
>X
>Xstruct slcp {
>X	u_long	opts;		/* LCP options to send (bitfield) */
>X	u_long  magic;          /* local magic number */
>X	u_long	mru;		/* our max receive unit */
>X	u_long	their_mru;	/* their max receive unit */
>X	u_long	protos;		/* bitmask of protos that are started */
>X	u_char  echoid;         /* id of last keepalive echo request */
>X	/* restart max values, see RFC 1661 */
>X	int	timeout;
>X	int	max_terminate;
>X	int	max_configure;
>X	int	max_failure;
>X};
>X
>X#define IDX_IPCP 1		/* idx into state table */
>X
>Xstruct sipcp {
>X	u_long	opts;		/* IPCP options to send (bitfield) */
>X	u_int	flags;
>X#define IPCP_HISADDR_SEEN 1	/* have seen his address already */
>X#define IPCP_MYADDR_DYN   2	/* my address is dynamically assigned */
>X#define IPCP_MYADDR_SEEN  4	/* have seen his address already */
>X};
>X
>X#define AUTHNAMELEN	32
>X#define AUTHKEYLEN	16
>X
>Xstruct sauth {
>X	u_short	proto;			/* authentication protocol to use */
>X	u_short	flags;
>X#define AUTHFLAG_NOCALLOUT	1	/* do not require authentication on */
>X					/* callouts */
>X#define AUTHFLAG_NORECHALLENGE	2	/* do not re-challenge CHAP */
>X	u_char	name[AUTHNAMELEN];	/* system identification name */
>X	u_char	secret[AUTHKEYLEN];	/* secret password */
>X	u_char	challenge[AUTHKEYLEN];	/* random challenge */
>X};
>X
>X#define IDX_PAP		2
>X#define IDX_CHAP	3
>X
>X#define IDX_COUNT (IDX_CHAP + 1) /* bump this when adding cp's! */
>X
>X/*
>X * Don't change the order of this.  Ordering the phases this way allows
>X * for a comparision of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
>X * know whether LCP is up.
>X */
>Xenum ppp_phase {
>X	PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
>X	PHASE_AUTHENTICATE, PHASE_NETWORK
>X};
>X
>Xstruct sppp {
>X	/* NB: pp_if _must_ be first */
>X	struct  ifnet pp_if;    /* network interface data */
>X	struct  ifqueue pp_fastq; /* fast output queue */
>X	struct	ifqueue pp_cpq;	/* PPP control protocol queue */
>X	struct  sppp *pp_next;  /* next interface in keepalive list */
>X	u_int   pp_flags;       /* use Cisco protocol instead of PPP */
>X	u_short pp_alivecnt;    /* keepalive packets counter */
>X	u_short pp_loopcnt;     /* loopback detection counter */
>X	u_long  pp_seq;         /* local sequence number */
>X	u_long  pp_rseq;        /* remote sequence number */
>X	time_t  pp_last_sent;
>X	time_t  pp_last_recv;
>X	enum ppp_phase pp_phase;	/* phase we're currently in */
>X	int	state[IDX_COUNT];	/* state machine */
>X	u_char  confid[IDX_COUNT];	/* id of last configuration request */
>X	int	rst_counter[IDX_COUNT];	/* restart counter */
>X	int	fail_counter[IDX_COUNT]; /* negotiation failure counter */
>X	struct callout_handle ch[IDX_COUNT]; /* per-proto and if callouts */
>X	struct callout_handle pap_my_to_ch; /* PAP needs one more... */
>X	struct slcp lcp;		/* LCP params */
>X	struct sipcp ipcp;		/* IPCP params */
>X	struct sauth myauth;		/* auth params, i'm peer */
>X	struct sauth hisauth;		/* auth params, i'm authenticator */
>X	/*
>X	 * These functions are filled in by sppp_attach(), and are
>X	 * expected to be used by the lower layer (hardware) drivers
>X	 * in order to communicate the (un)availability of the
>X	 * communication link.  Lower layer drivers that are always
>X	 * ready to communicate (like hardware HDLC) can shortcut
>X	 * pp_up from pp_tls, and pp_down from pp_tlf.
>X	 */
>X	void	(*pp_up)(struct sppp *sp);
>X	void	(*pp_down)(struct sppp *sp);
>X	/*
>X	 * These functions need to be filled in by the lower layer
>X	 * (hardware) drivers if they request notification from the
>X	 * PPP layer whether the link is actually required.  They
>X	 * correspond to the tls and tlf actions.
>X	 */
>X	void	(*pp_tls)(struct sppp *sp);
>X	void	(*pp_tlf)(struct sppp *sp);
>X	/*
>X	 * These (optional) functions may be filled by the hardware
>X	 * driver if any notification of established connections
>X	 * (currently: IPCP up) is desired (pp_con) or any internal
>X	 * state change of the interface state machine should be
>X	 * signaled for monitoring purposes (pp_chg).
>X	 */
>X	void	(*pp_con)(struct sppp *sp);
>X	void	(*pp_chg)(struct sppp *sp, int new_state);
>X	/* These two fields are for use by the lower layer */
>X	void    *pp_lowerp;
>X	int     pp_loweri;
>X};
>X
>X#define PP_KEEPALIVE    0x01    /* use keepalive protocol */
>X#define PP_CISCO        0x02    /* use Cisco protocol instead of PPP */
>X				/* 0x04 was PP_TIMO */
>X#define PP_CALLIN	0x08	/* we are being called */
>X#define PP_NEEDAUTH	0x10	/* remote requested authentication */
>X
>X
>X#define PP_MTU          1500    /* default/minimal MRU */
>X#define PP_MAX_MRU	2048	/* maximal MRU we want to negotiate */
>X
>X/*
>X * Definitions to pass struct sppp data down into the kernel using the
>X * SIOC[SG]IFGENERIC ioctl interface.
>X *
>X * In order to use this, create a struct spppreq, fill in the cmd
>X * field with SPPPIOGDEFS, and put the address of this structure into
>X * the ifr_data portion of a struct ifreq.  Pass this struct to a
>X * SIOCGIFGENERIC ioctl.  Then replace the cmd field by SPPPIOCDEFS,
>X * modify the defs field as desired, and pass the struct ifreq now
>X * to a SIOCSIFGENERIC ioctl.
>X */
>X
>X#define SPPPIOGDEFS  ((caddr_t)(('S' << 24) + (1 << 16) + sizeof(struct sppp)))
>X#define SPPPIOSDEFS  ((caddr_t)(('S' << 24) + (2 << 16) + sizeof(struct sppp)))
>X
>Xstruct spppreq {
>X	int	cmd;
>X	struct sppp defs;
>X};
>X
>X#ifdef KERNEL
>Xvoid sppp_attach (struct ifnet *ifp);
>Xvoid sppp_detach (struct ifnet *ifp);
>Xvoid sppp_input (struct ifnet *ifp, struct mbuf *m);
>Xint sppp_ioctl (struct ifnet *ifp, u_long cmd, void *data);
>Xstruct mbuf *sppp_dequeue (struct ifnet *ifp);
>Xstruct mbuf *sppp_pick(struct ifnet *ifp);
>Xint sppp_isempty (struct ifnet *ifp);
>Xvoid sppp_flush (struct ifnet *ifp);
>X#endif
>X
>X#endif /* _NET_IF_SPPP_H_ */
>END-of-./usr/include/net/if_sppp.h
>echo x - ./usr/include/net/if_sppp.h.orig
>sed 's/^X//' >./usr/include/net/if_sppp.h.orig << 'END-of-./usr/include/net/if_sppp.h.orig'
>X/*
>X * Defines for synchronous PPP/Cisco link level subroutines.
>X *
>X * Copyright (C) 1994 Cronyx Ltd.
>X * Author: Serge Vakulenko, <vak@cronyx.ru>
>X *
>X * Heavily revamped to conform to RFC 1661.
>X * Copyright (C) 1997, Joerg Wunsch.
>X *
>X * This software is distributed with NO WARRANTIES, not even the implied
>X * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>X *
>X * Authors grant any other persons or organizations permission to use
>X * or modify this software as long as this message is kept with the software,
>X * all derivative works or modified versions.
>X *
>X * From: Version 2.0, Fri Oct  6 20:39:21 MSK 1995
>X *
>X * $Id: if_sppp.h,v 1.13 1998/12/27 21:30:44 phk Exp $
>X */
>X
>X#ifndef _NET_IF_SPPP_H_
>X#define _NET_IF_SPPP_H_ 1
>X
>X#define IDX_LCP 0		/* idx into state table */
>X
>Xstruct slcp {
>X	u_long	opts;		/* LCP options to send (bitfield) */
>X	u_long  magic;          /* local magic number */
>X	u_long	mru;		/* our max receive unit */
>X	u_long	their_mru;	/* their max receive unit */
>X	u_long	protos;		/* bitmask of protos that are started */
>X	u_char  echoid;         /* id of last keepalive echo request */
>X	/* restart max values, see RFC 1661 */
>X	int	timeout;
>X	int	max_terminate;
>X	int	max_configure;
>X	int	max_failure;
>X};
>X
>X#define IDX_IPCP 1		/* idx into state table */
>X
>Xstruct sipcp {
>X	u_long	opts;		/* IPCP options to send (bitfield) */
>X	u_int	flags;
>X#define IPCP_HISADDR_SEEN 1	/* have seen his address already */
>X#define IPCP_MYADDR_DYN   2	/* my address is dynamically assigned */
>X#define IPCP_MYADDR_SEEN  4	/* have seen his address already */
>X};
>X
>X#define AUTHNAMELEN	32
>X#define AUTHKEYLEN	16
>X
>Xstruct sauth {
>X	u_short	proto;			/* authentication protocol to use */
>X	u_short	flags;
>X#define AUTHFLAG_NOCALLOUT	1	/* do not require authentication on */
>X					/* callouts */
>X#define AUTHFLAG_NORECHALLENGE	2	/* do not re-challenge CHAP */
>X	u_char	name[AUTHNAMELEN];	/* system identification name */
>X	u_char	secret[AUTHKEYLEN];	/* secret password */
>X	u_char	challenge[AUTHKEYLEN];	/* random challenge */
>X};
>X
>X#define IDX_PAP		2
>X#define IDX_CHAP	3
>X
>X#define IDX_COUNT (IDX_CHAP + 1) /* bump this when adding cp's! */
>X
>X/*
>X * Don't change the order of this.  Ordering the phases this way allows
>X * for a comparision of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
>X * know whether LCP is up.
>X */
>Xenum ppp_phase {
>X	PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
>X	PHASE_AUTHENTICATE, PHASE_NETWORK
>X};
>X
>Xstruct sppp {
>X	/* NB: pp_if _must_ be first */
>X	struct  ifnet pp_if;    /* network interface data */
>X	struct  ifqueue pp_fastq; /* fast output queue */
>X	struct	ifqueue pp_cpq;	/* PPP control protocol queue */
>X	struct  sppp *pp_next;  /* next interface in keepalive list */
>X	u_int   pp_flags;       /* use Cisco protocol instead of PPP */
>X	u_short pp_alivecnt;    /* keepalive packets counter */
>X	u_short pp_loopcnt;     /* loopback detection counter */
>X	u_long  pp_seq;         /* local sequence number */
>X	u_long  pp_rseq;        /* remote sequence number */
>X	enum ppp_phase pp_phase;	/* phase we're currently in */
>X	int	state[IDX_COUNT];	/* state machine */
>X	u_char  confid[IDX_COUNT];	/* id of last configuration request */
>X	int	rst_counter[IDX_COUNT];	/* restart counter */
>X	int	fail_counter[IDX_COUNT]; /* negotiation failure counter */
>X	struct callout_handle ch[IDX_COUNT]; /* per-proto and if callouts */
>X	struct callout_handle pap_my_to_ch; /* PAP needs one more... */
>X	struct slcp lcp;		/* LCP params */
>X	struct sipcp ipcp;		/* IPCP params */
>X	struct sauth myauth;		/* auth params, i'm peer */
>X	struct sauth hisauth;		/* auth params, i'm authenticator */
>X	/*
>X	 * These functions are filled in by sppp_attach(), and are
>X	 * expected to be used by the lower layer (hardware) drivers
>X	 * in order to communicate the (un)availability of the
>X	 * communication link.  Lower layer drivers that are always
>X	 * ready to communicate (like hardware HDLC) can shortcut
>X	 * pp_up from pp_tls, and pp_down from pp_tlf.
>X	 */
>X	void	(*pp_up)(struct sppp *sp);
>X	void	(*pp_down)(struct sppp *sp);
>X	/*
>X	 * These functions need to be filled in by the lower layer
>X	 * (hardware) drivers if they request notification from the
>X	 * PPP layer whether the link is actually required.  They
>X	 * correspond to the tls and tlf actions.
>X	 */
>X	void	(*pp_tls)(struct sppp *sp);
>X	void	(*pp_tlf)(struct sppp *sp);
>X	/*
>X	 * These (optional) functions may be filled by the hardware
>X	 * driver if any notification of established connections
>X	 * (currently: IPCP up) is desired (pp_con) or any internal
>X	 * state change of the interface state machine should be
>X	 * signaled for monitoring purposes (pp_chg).
>X	 */
>X	void	(*pp_con)(struct sppp *sp);
>X	void	(*pp_chg)(struct sppp *sp, int new_state);
>X	/* These two fields are for use by the lower layer */
>X	void    *pp_lowerp;
>X	int     pp_loweri;
>X};
>X
>X#define PP_KEEPALIVE    0x01    /* use keepalive protocol */
>X#define PP_CISCO        0x02    /* use Cisco protocol instead of PPP */
>X				/* 0x04 was PP_TIMO */
>X#define PP_CALLIN	0x08	/* we are being called */
>X#define PP_NEEDAUTH	0x10	/* remote requested authentication */
>X
>X
>X#define PP_MTU          1500    /* default/minimal MRU */
>X#define PP_MAX_MRU	2048	/* maximal MRU we want to negotiate */
>X
>X/*
>X * Definitions to pass struct sppp data down into the kernel using the
>X * SIOC[SG]IFGENERIC ioctl interface.
>X *
>X * In order to use this, create a struct spppreq, fill in the cmd
>X * field with SPPPIOGDEFS, and put the address of this structure into
>X * the ifr_data portion of a struct ifreq.  Pass this struct to a
>X * SIOCGIFGENERIC ioctl.  Then replace the cmd field by SPPPIOCDEFS,
>X * modify the defs field as desired, and pass the struct ifreq now
>X * to a SIOCSIFGENERIC ioctl.
>X */
>X
>X#define SPPPIOGDEFS  ((caddr_t)(('S' << 24) + (1 << 16) + sizeof(struct sppp)))
>X#define SPPPIOSDEFS  ((caddr_t)(('S' << 24) + (2 << 16) + sizeof(struct sppp)))
>X
>Xstruct spppreq {
>X	int	cmd;
>X	struct sppp defs;
>X};
>X
>X#ifdef KERNEL
>Xvoid sppp_attach (struct ifnet *ifp);
>Xvoid sppp_detach (struct ifnet *ifp);
>Xvoid sppp_input (struct ifnet *ifp, struct mbuf *m);
>Xint sppp_ioctl (struct ifnet *ifp, u_long cmd, void *data);
>Xstruct mbuf *sppp_dequeue (struct ifnet *ifp);
>Xstruct mbuf *sppp_pick(struct ifnet *ifp);
>Xint sppp_isempty (struct ifnet *ifp);
>Xvoid sppp_flush (struct ifnet *ifp);
>X#endif
>X
>X#endif /* _NET_IF_SPPP_H_ */
>END-of-./usr/include/net/if_sppp.h.orig
>echo x - ./usr/include/net/if_sppp.h.patch
>sed 's/^X//' >./usr/include/net/if_sppp.h.patch << 'END-of-./usr/include/net/if_sppp.h.patch'
>X*** if_sppp.h		Tue Dec  1 21:20:19 1998
>X--- if_sppp.h.new	Tue Mar 16 15:54:06 1999
>X***************
>X*** 90,95 ****
>X--- 90,97 ----
>X  	u_short pp_loopcnt;     /* loopback detection counter */
>X  	u_long  pp_seq;         /* local sequence number */
>X  	u_long  pp_rseq;        /* remote sequence number */
>X+ 	time_t  pp_last_sent;
>X+ 	time_t  pp_last_recv;
>X  	enum ppp_phase pp_phase;	/* phase we're currently in */
>X  	int	state[IDX_COUNT];	/* state machine */
>X  	u_char  confid[IDX_COUNT];	/* id of last configuration request */
>END-of-./usr/include/net/if_sppp.h.patch
>echo c - ./usr/src
>mkdir -p ./usr/src > /dev/null 2>&1
>echo c - ./usr/src/sys
>mkdir -p ./usr/src/sys > /dev/null 2>&1
>echo c - ./usr/src/sys/net
>mkdir -p ./usr/src/sys/net > /dev/null 2>&1
>echo x - ./usr/src/sys/net/if_sppp.h
>sed 's/^X//' >./usr/src/sys/net/if_sppp.h << 'END-of-./usr/src/sys/net/if_sppp.h'
>X/*
>X * Defines for synchronous PPP/Cisco link level subroutines.
>X *
>X * Copyright (C) 1994 Cronyx Ltd.
>X * Author: Serge Vakulenko, <vak@cronyx.ru>
>X *
>X * Heavily revamped to conform to RFC 1661.
>X * Copyright (C) 1997, Joerg Wunsch.
>X *
>X * This software is distributed with NO WARRANTIES, not even the implied
>X * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>X *
>X * Authors grant any other persons or organizations permission to use
>X * or modify this software as long as this message is kept with the software,
>X * all derivative works or modified versions.
>X *
>X * From: Version 2.0, Fri Oct  6 20:39:21 MSK 1995
>X *
>X * $Id: if_sppp.h,v 1.13 1998/12/27 21:30:44 phk Exp $
>X */
>X
>X#ifndef _NET_IF_SPPP_H_
>X#define _NET_IF_SPPP_H_ 1
>X
>X#define IDX_LCP 0		/* idx into state table */
>X
>Xstruct slcp {
>X	u_long	opts;		/* LCP options to send (bitfield) */
>X	u_long  magic;          /* local magic number */
>X	u_long	mru;		/* our max receive unit */
>X	u_long	their_mru;	/* their max receive unit */
>X	u_long	protos;		/* bitmask of protos that are started */
>X	u_char  echoid;         /* id of last keepalive echo request */
>X	/* restart max values, see RFC 1661 */
>X	int	timeout;
>X	int	max_terminate;
>X	int	max_configure;
>X	int	max_failure;
>X};
>X
>X#define IDX_IPCP 1		/* idx into state table */
>X
>Xstruct sipcp {
>X	u_long	opts;		/* IPCP options to send (bitfield) */
>X	u_int	flags;
>X#define IPCP_HISADDR_SEEN 1	/* have seen his address already */
>X#define IPCP_MYADDR_DYN   2	/* my address is dynamically assigned */
>X#define IPCP_MYADDR_SEEN  4	/* have seen his address already */
>X};
>X
>X#define AUTHNAMELEN	32
>X#define AUTHKEYLEN	16
>X
>Xstruct sauth {
>X	u_short	proto;			/* authentication protocol to use */
>X	u_short	flags;
>X#define AUTHFLAG_NOCALLOUT	1	/* do not require authentication on */
>X					/* callouts */
>X#define AUTHFLAG_NORECHALLENGE	2	/* do not re-challenge CHAP */
>X	u_char	name[AUTHNAMELEN];	/* system identification name */
>X	u_char	secret[AUTHKEYLEN];	/* secret password */
>X	u_char	challenge[AUTHKEYLEN];	/* random challenge */
>X};
>X
>X#define IDX_PAP		2
>X#define IDX_CHAP	3
>X
>X#define IDX_COUNT (IDX_CHAP + 1) /* bump this when adding cp's! */
>X
>X/*
>X * Don't change the order of this.  Ordering the phases this way allows
>X * for a comparision of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
>X * know whether LCP is up.
>X */
>Xenum ppp_phase {
>X	PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
>X	PHASE_AUTHENTICATE, PHASE_NETWORK
>X};
>X
>Xstruct sppp {
>X	/* NB: pp_if _must_ be first */
>X	struct  ifnet pp_if;    /* network interface data */
>X	struct  ifqueue pp_fastq; /* fast output queue */
>X	struct	ifqueue pp_cpq;	/* PPP control protocol queue */
>X	struct  sppp *pp_next;  /* next interface in keepalive list */
>X	u_int   pp_flags;       /* use Cisco protocol instead of PPP */
>X	u_short pp_alivecnt;    /* keepalive packets counter */
>X	u_short pp_loopcnt;     /* loopback detection counter */
>X	u_long  pp_seq;         /* local sequence number */
>X	u_long  pp_rseq;        /* remote sequence number */
>X	time_t  pp_last_sent;
>X	time_t  pp_last_recv;
>X	enum ppp_phase pp_phase;	/* phase we're currently in */
>X	int	state[IDX_COUNT];	/* state machine */
>X	u_char  confid[IDX_COUNT];	/* id of last configuration request */
>X	int	rst_counter[IDX_COUNT];	/* restart counter */
>X	int	fail_counter[IDX_COUNT]; /* negotiation failure counter */
>X	struct callout_handle ch[IDX_COUNT]; /* per-proto and if callouts */
>X	struct callout_handle pap_my_to_ch; /* PAP needs one more... */
>X	struct slcp lcp;		/* LCP params */
>X	struct sipcp ipcp;		/* IPCP params */
>X	struct sauth myauth;		/* auth params, i'm peer */
>X	struct sauth hisauth;		/* auth params, i'm authenticator */
>X	/*
>X	 * These functions are filled in by sppp_attach(), and are
>X	 * expected to be used by the lower layer (hardware) drivers
>X	 * in order to communicate the (un)availability of the
>X	 * communication link.  Lower layer drivers that are always
>X	 * ready to communicate (like hardware HDLC) can shortcut
>X	 * pp_up from pp_tls, and pp_down from pp_tlf.
>X	 */
>X	void	(*pp_up)(struct sppp *sp);
>X	void	(*pp_down)(struct sppp *sp);
>X	/*
>X	 * These functions need to be filled in by the lower layer
>X	 * (hardware) drivers if they request notification from the
>X	 * PPP layer whether the link is actually required.  They
>X	 * correspond to the tls and tlf actions.
>X	 */
>X	void	(*pp_tls)(struct sppp *sp);
>X	void	(*pp_tlf)(struct sppp *sp);
>X	/*
>X	 * These (optional) functions may be filled by the hardware
>X	 * driver if any notification of established connections
>X	 * (currently: IPCP up) is desired (pp_con) or any internal
>X	 * state change of the interface state machine should be
>X	 * signaled for monitoring purposes (pp_chg).
>X	 */
>X	void	(*pp_con)(struct sppp *sp);
>X	void	(*pp_chg)(struct sppp *sp, int new_state);
>X	/* These two fields are for use by the lower layer */
>X	void    *pp_lowerp;
>X	int     pp_loweri;
>X};
>X
>X#define PP_KEEPALIVE    0x01    /* use keepalive protocol */
>X#define PP_CISCO        0x02    /* use Cisco protocol instead of PPP */
>X				/* 0x04 was PP_TIMO */
>X#define PP_CALLIN	0x08	/* we are being called */
>X#define PP_NEEDAUTH	0x10	/* remote requested authentication */
>X
>X
>X#define PP_MTU          1500    /* default/minimal MRU */
>X#define PP_MAX_MRU	2048	/* maximal MRU we want to negotiate */
>X
>X/*
>X * Definitions to pass struct sppp data down into the kernel using the
>X * SIOC[SG]IFGENERIC ioctl interface.
>X *
>X * In order to use this, create a struct spppreq, fill in the cmd
>X * field with SPPPIOGDEFS, and put the address of this structure into
>X * the ifr_data portion of a struct ifreq.  Pass this struct to a
>X * SIOCGIFGENERIC ioctl.  Then replace the cmd field by SPPPIOCDEFS,
>X * modify the defs field as desired, and pass the struct ifreq now
>X * to a SIOCSIFGENERIC ioctl.
>X */
>X
>X#define SPPPIOGDEFS  ((caddr_t)(('S' << 24) + (1 << 16) + sizeof(struct sppp)))
>X#define SPPPIOSDEFS  ((caddr_t)(('S' << 24) + (2 << 16) + sizeof(struct sppp)))
>X
>Xstruct spppreq {
>X	int	cmd;
>X	struct sppp defs;
>X};
>X
>X#ifdef KERNEL
>Xvoid sppp_attach (struct ifnet *ifp);
>Xvoid sppp_detach (struct ifnet *ifp);
>Xvoid sppp_input (struct ifnet *ifp, struct mbuf *m);
>Xint sppp_ioctl (struct ifnet *ifp, u_long cmd, void *data);
>Xstruct mbuf *sppp_dequeue (struct ifnet *ifp);
>Xstruct mbuf *sppp_pick(struct ifnet *ifp);
>Xint sppp_isempty (struct ifnet *ifp);
>Xvoid sppp_flush (struct ifnet *ifp);
>X#endif
>X
>X#endif /* _NET_IF_SPPP_H_ */
>END-of-./usr/src/sys/net/if_sppp.h
>echo x - ./usr/src/sys/net/if_sppp.h.orig
>sed 's/^X//' >./usr/src/sys/net/if_sppp.h.orig << 'END-of-./usr/src/sys/net/if_sppp.h.orig'
>X/*
>X * Defines for synchronous PPP/Cisco link level subroutines.
>X *
>X * Copyright (C) 1994 Cronyx Ltd.
>X * Author: Serge Vakulenko, <vak@cronyx.ru>
>X *
>X * Heavily revamped to conform to RFC 1661.
>X * Copyright (C) 1997, Joerg Wunsch.
>X *
>X * This software is distributed with NO WARRANTIES, not even the implied
>X * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>X *
>X * Authors grant any other persons or organizations permission to use
>X * or modify this software as long as this message is kept with the software,
>X * all derivative works or modified versions.
>X *
>X * From: Version 2.0, Fri Oct  6 20:39:21 MSK 1995
>X *
>X * $Id: if_sppp.h,v 1.13 1998/12/27 21:30:44 phk Exp $
>X */
>X
>X#ifndef _NET_IF_SPPP_H_
>X#define _NET_IF_SPPP_H_ 1
>X
>X#define IDX_LCP 0		/* idx into state table */
>X
>Xstruct slcp {
>X	u_long	opts;		/* LCP options to send (bitfield) */
>X	u_long  magic;          /* local magic number */
>X	u_long	mru;		/* our max receive unit */
>X	u_long	their_mru;	/* their max receive unit */
>X	u_long	protos;		/* bitmask of protos that are started */
>X	u_char  echoid;         /* id of last keepalive echo request */
>X	/* restart max values, see RFC 1661 */
>X	int	timeout;
>X	int	max_terminate;
>X	int	max_configure;
>X	int	max_failure;
>X};
>X
>X#define IDX_IPCP 1		/* idx into state table */
>X
>Xstruct sipcp {
>X	u_long	opts;		/* IPCP options to send (bitfield) */
>X	u_int	flags;
>X#define IPCP_HISADDR_SEEN 1	/* have seen his address already */
>X#define IPCP_MYADDR_DYN   2	/* my address is dynamically assigned */
>X#define IPCP_MYADDR_SEEN  4	/* have seen his address already */
>X};
>X
>X#define AUTHNAMELEN	32
>X#define AUTHKEYLEN	16
>X
>Xstruct sauth {
>X	u_short	proto;			/* authentication protocol to use */
>X	u_short	flags;
>X#define AUTHFLAG_NOCALLOUT	1	/* do not require authentication on */
>X					/* callouts */
>X#define AUTHFLAG_NORECHALLENGE	2	/* do not re-challenge CHAP */
>X	u_char	name[AUTHNAMELEN];	/* system identification name */
>X	u_char	secret[AUTHKEYLEN];	/* secret password */
>X	u_char	challenge[AUTHKEYLEN];	/* random challenge */
>X};
>X
>X#define IDX_PAP		2
>X#define IDX_CHAP	3
>X
>X#define IDX_COUNT (IDX_CHAP + 1) /* bump this when adding cp's! */
>X
>X/*
>X * Don't change the order of this.  Ordering the phases this way allows
>X * for a comparision of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
>X * know whether LCP is up.
>X */
>Xenum ppp_phase {
>X	PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
>X	PHASE_AUTHENTICATE, PHASE_NETWORK
>X};
>X
>Xstruct sppp {
>X	/* NB: pp_if _must_ be first */
>X	struct  ifnet pp_if;    /* network interface data */
>X	struct  ifqueue pp_fastq; /* fast output queue */
>X	struct	ifqueue pp_cpq;	/* PPP control protocol queue */
>X	struct  sppp *pp_next;  /* next interface in keepalive list */
>X	u_int   pp_flags;       /* use Cisco protocol instead of PPP */
>X	u_short pp_alivecnt;    /* keepalive packets counter */
>X	u_short pp_loopcnt;     /* loopback detection counter */
>X	u_long  pp_seq;         /* local sequence number */
>X	u_long  pp_rseq;        /* remote sequence number */
>X	enum ppp_phase pp_phase;	/* phase we're currently in */
>X	int	state[IDX_COUNT];	/* state machine */
>X	u_char  confid[IDX_COUNT];	/* id of last configuration request */
>X	int	rst_counter[IDX_COUNT];	/* restart counter */
>X	int	fail_counter[IDX_COUNT]; /* negotiation failure counter */
>X	struct callout_handle ch[IDX_COUNT]; /* per-proto and if callouts */
>X	struct callout_handle pap_my_to_ch; /* PAP needs one more... */
>X	struct slcp lcp;		/* LCP params */
>X	struct sipcp ipcp;		/* IPCP params */
>X	struct sauth myauth;		/* auth params, i'm peer */
>X	struct sauth hisauth;		/* auth params, i'm authenticator */
>X	/*
>X	 * These functions are filled in by sppp_attach(), and are
>X	 * expected to be used by the lower layer (hardware) drivers
>X	 * in order to communicate the (un)availability of the
>X	 * communication link.  Lower layer drivers that are always
>X	 * ready to communicate (like hardware HDLC) can shortcut
>X	 * pp_up from pp_tls, and pp_down from pp_tlf.
>X	 */
>X	void	(*pp_up)(struct sppp *sp);
>X	void	(*pp_down)(struct sppp *sp);
>X	/*
>X	 * These functions need to be filled in by the lower layer
>X	 * (hardware) drivers if they request notification from the
>X	 * PPP layer whether the link is actually required.  They
>X	 * correspond to the tls and tlf actions.
>X	 */
>X	void	(*pp_tls)(struct sppp *sp);
>X	void	(*pp_tlf)(struct sppp *sp);
>X	/*
>X	 * These (optional) functions may be filled by the hardware
>X	 * driver if any notification of established connections
>X	 * (currently: IPCP up) is desired (pp_con) or any internal
>X	 * state change of the interface state machine should be
>X	 * signaled for monitoring purposes (pp_chg).
>X	 */
>X	void	(*pp_con)(struct sppp *sp);
>X	void	(*pp_chg)(struct sppp *sp, int new_state);
>X	/* These two fields are for use by the lower layer */
>X	void    *pp_lowerp;
>X	int     pp_loweri;
>X};
>X
>X#define PP_KEEPALIVE    0x01    /* use keepalive protocol */
>X#define PP_CISCO        0x02    /* use Cisco protocol instead of PPP */
>X				/* 0x04 was PP_TIMO */
>X#define PP_CALLIN	0x08	/* we are being called */
>X#define PP_NEEDAUTH	0x10	/* remote requested authentication */
>X
>X
>X#define PP_MTU          1500    /* default/minimal MRU */
>X#define PP_MAX_MRU	2048	/* maximal MRU we want to negotiate */
>X
>X/*
>X * Definitions to pass struct sppp data down into the kernel using the
>X * SIOC[SG]IFGENERIC ioctl interface.
>X *
>X * In order to use this, create a struct spppreq, fill in the cmd
>X * field with SPPPIOGDEFS, and put the address of this structure into
>X * the ifr_data portion of a struct ifreq.  Pass this struct to a
>X * SIOCGIFGENERIC ioctl.  Then replace the cmd field by SPPPIOCDEFS,
>X * modify the defs field as desired, and pass the struct ifreq now
>X * to a SIOCSIFGENERIC ioctl.
>X */
>X
>X#define SPPPIOGDEFS  ((caddr_t)(('S' << 24) + (1 << 16) + sizeof(struct sppp)))
>X#define SPPPIOSDEFS  ((caddr_t)(('S' << 24) + (2 << 16) + sizeof(struct sppp)))
>X
>Xstruct spppreq {
>X	int	cmd;
>X	struct sppp defs;
>X};
>X
>X#ifdef KERNEL
>Xvoid sppp_attach (struct ifnet *ifp);
>Xvoid sppp_detach (struct ifnet *ifp);
>Xvoid sppp_input (struct ifnet *ifp, struct mbuf *m);
>Xint sppp_ioctl (struct ifnet *ifp, u_long cmd, void *data);
>Xstruct mbuf *sppp_dequeue (struct ifnet *ifp);
>Xstruct mbuf *sppp_pick(struct ifnet *ifp);
>Xint sppp_isempty (struct ifnet *ifp);
>Xvoid sppp_flush (struct ifnet *ifp);
>X#endif
>X
>X#endif /* _NET_IF_SPPP_H_ */
>END-of-./usr/src/sys/net/if_sppp.h.orig
>echo x - ./usr/src/sys/net/if_sppp.h.patch
>sed 's/^X//' >./usr/src/sys/net/if_sppp.h.patch << 'END-of-./usr/src/sys/net/if_sppp.h.patch'
>X*** if_sppp.h		Tue Dec  1 21:20:19 1998
>X--- if_sppp.h.new	Tue Mar 16 15:54:06 1999
>X***************
>X*** 90,95 ****
>X--- 90,97 ----
>X  	u_short pp_loopcnt;     /* loopback detection counter */
>X  	u_long  pp_seq;         /* local sequence number */
>X  	u_long  pp_rseq;        /* remote sequence number */
>X+ 	time_t  pp_last_sent;
>X+ 	time_t  pp_last_recv;
>X  	enum ppp_phase pp_phase;	/* phase we're currently in */
>X  	int	state[IDX_COUNT];	/* state machine */
>X  	u_char  confid[IDX_COUNT];	/* id of last configuration request */
>END-of-./usr/src/sys/net/if_sppp.h.patch
>echo x - ./usr/src/sys/net/if_spppsubr.c
>sed 's/^X//' >./usr/src/sys/net/if_spppsubr.c << 'END-of-./usr/src/sys/net/if_spppsubr.c'
>X/*
>X * Synchronous PPP/Cisco link level subroutines.
>X * Keepalive protocol implemented in both Cisco and PPP modes.
>X *
>X * Copyright (C) 1994-1996 Cronyx Engineering Ltd.
>X * Author: Serge Vakulenko, <vak@cronyx.ru>
>X *
>X * Heavily revamped to conform to RFC 1661.
>X * Copyright (C) 1997, Joerg Wunsch.
>X *
>X * This software is distributed with NO WARRANTIES, not even the implied
>X * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>X *
>X * Authors grant any other persons or organisations permission to use
>X * or modify this software as long as this message is kept with the software,
>X * all derivative works or modified versions.
>X *
>X * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
>X *
>X * $Id: if_spppsubr.c,v 1.52 1998/12/27 21:30:44 phk Exp $
>X */
>X
>X#include <sys/param.h>
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#include "opt_inet.h"
>X#include "opt_ipx.h"
>X#endif
>X
>X#ifdef NetBSD1_3
>X#  if NetBSD1_3 > 6
>X#      include "opt_inet.h"
>X#      include "opt_iso.h"
>X#  endif
>X#endif
>X
>X#include <sys/systm.h>
>X#include <sys/kernel.h>
>X#include <sys/sockio.h>
>X#include <sys/socket.h>
>X#include <sys/syslog.h>
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#include <machine/random.h>
>X#endif
>X#include <sys/malloc.h>
>X#include <sys/mbuf.h>
>X
>X#if defined (__OpenBSD__)
>X#include <sys/md5k.h>
>X#else
>X#include <sys/md5.h>
>X#endif
>X
>X#include <net/if.h>
>X#include <net/netisr.h>
>X#include <net/if_types.h>
>X#include <net/route.h>
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#include <machine/random.h>
>X#endif
>X#if defined (__NetBSD__) || defined (__OpenBSD__)
>X#include <machine/cpu.h> /* XXX for softnet */
>X#endif
>X
>X#include <machine/stdarg.h>
>X
>X#ifdef INET
>X#include <netinet/in.h>
>X#include <netinet/in_systm.h>
>X#include <netinet/in_var.h>
>X#include <netinet/ip.h>
>X#include <netinet/tcp.h>
>X# if defined (__FreeBSD__) || defined (__OpenBSD__)
>X#  include <netinet/if_ether.h>
>X# else
>X#  include <net/ethertypes.h>
>X# endif
>X#else
>X# error Huh? sppp without INET?
>X#endif
>X
>X#ifdef IPX
>X#include <netipx/ipx.h>
>X#include <netipx/ipx_if.h>
>X#endif
>X
>X#ifdef NS
>X#include <netns/ns.h>
>X#include <netns/ns_if.h>
>X#endif
>X
>X#ifdef ISO
>X#include <netiso/argo_debug.h>
>X#include <netiso/iso.h>
>X#include <netiso/iso_var.h>
>X#include <netiso/iso_snpac.h>
>X#endif
>X
>X#include <net/if_sppp.h>
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X# define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg, handle)
>X# define TIMEOUT(fun, arg1, arg2, handle) handle = timeout(fun, arg1, arg2)
>X# define IOCTL_CMD_T	u_long
>X#else
>X# define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg)
>X# define TIMEOUT(fun, arg1, arg2, handle) timeout(fun, arg1, arg2)
>X# define IOCTL_CMD_T	int
>X#endif
>X
>X#define MAXALIVECNT     3               /* max. alive packets */
>X
>X/*
>X * Interface flags that can be set in an ifconfig command.
>X *
>X * Setting link0 will make the link passive, i.e. it will be marked
>X * as being administrative openable, but won't be opened to begin
>X * with.  Incoming calls will be answered, or subsequent calls with
>X * -link1 will cause the administrative open of the LCP layer.
>X *
>X * Setting link1 will cause the link to auto-dial only as packets
>X * arrive to be sent.
>X *
>X * Setting IFF_DEBUG will syslog the option negotiation and state
>X * transitions at level kern.debug.  Note: all logs consistently look
>X * like
>X *
>X *   <if-name><unit>: <proto-name> <additional info...>
>X *
>X * with <if-name><unit> being something like "bppp0", and <proto-name>
>X * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
>X */
>X
>X#define IFF_PASSIVE	IFF_LINK0	/* wait passively for connection */
>X#define IFF_AUTO	IFF_LINK1	/* auto-dial on output */
>X
>X#define PPP_ALLSTATIONS 0xff		/* All-Stations broadcast address */
>X#define PPP_UI		0x03		/* Unnumbered Information */
>X#define PPP_IP		0x0021		/* Internet Protocol */
>X#define PPP_ISO		0x0023		/* ISO OSI Protocol */
>X#define PPP_XNS		0x0025		/* Xerox NS Protocol */
>X#define PPP_IPX		0x002b		/* Novell IPX Protocol */
>X#define PPP_LCP		0xc021		/* Link Control Protocol */
>X#define PPP_PAP		0xc023		/* Password Authentication Protocol */
>X#define PPP_CHAP	0xc223		/* Challenge-Handshake Auth Protocol */
>X#define PPP_IPCP	0x8021		/* Internet Protocol Control Protocol */
>X
>X#define CONF_REQ	1		/* PPP configure request */
>X#define CONF_ACK	2		/* PPP configure acknowledge */
>X#define CONF_NAK	3		/* PPP configure negative ack */
>X#define CONF_REJ	4		/* PPP configure reject */
>X#define TERM_REQ	5		/* PPP terminate request */
>X#define TERM_ACK	6		/* PPP terminate acknowledge */
>X#define CODE_REJ	7		/* PPP code reject */
>X#define PROTO_REJ	8		/* PPP protocol reject */
>X#define ECHO_REQ	9		/* PPP echo request */
>X#define ECHO_REPLY	10		/* PPP echo reply */
>X#define DISC_REQ	11		/* PPP discard request */
>X
>X#define LCP_OPT_MRU		1	/* maximum receive unit */
>X#define LCP_OPT_ASYNC_MAP	2	/* async control character map */
>X#define LCP_OPT_AUTH_PROTO	3	/* authentication protocol */
>X#define LCP_OPT_QUAL_PROTO	4	/* quality protocol */
>X#define LCP_OPT_MAGIC		5	/* magic number */
>X#define LCP_OPT_RESERVED	6	/* reserved */
>X#define LCP_OPT_PROTO_COMP	7	/* protocol field compression */
>X#define LCP_OPT_ADDR_COMP	8	/* address/control field compression */
>X
>X#define IPCP_OPT_ADDRESSES	1	/* both IP addresses; deprecated */
>X#define IPCP_OPT_COMPRESSION	2	/* IP compression protocol (VJ) */
>X#define IPCP_OPT_ADDRESS	3	/* local IP address */
>X
>X#define PAP_REQ			1	/* PAP name/password request */
>X#define PAP_ACK			2	/* PAP acknowledge */
>X#define PAP_NAK			3	/* PAP fail */
>X
>X#define CHAP_CHALLENGE		1	/* CHAP challenge request */
>X#define CHAP_RESPONSE		2	/* CHAP challenge response */
>X#define CHAP_SUCCESS		3	/* CHAP response ok */
>X#define CHAP_FAILURE		4	/* CHAP response failed */
>X
>X#define CHAP_MD5		5	/* hash algorithm - MD5 */
>X
>X#define CISCO_MULTICAST		0x8f	/* Cisco multicast address */
>X#define CISCO_UNICAST		0x0f	/* Cisco unicast address */
>X#define CISCO_KEEPALIVE		0x8035	/* Cisco keepalive protocol */
>X#define CISCO_ADDR_REQ		0	/* Cisco address request */
>X#define CISCO_ADDR_REPLY	1	/* Cisco address reply */
>X#define CISCO_KEEPALIVE_REQ	2	/* Cisco keepalive request */
>X
>X/* states are named and numbered according to RFC 1661 */
>X#define STATE_INITIAL	0
>X#define STATE_STARTING	1
>X#define STATE_CLOSED	2
>X#define STATE_STOPPED	3
>X#define STATE_CLOSING	4
>X#define STATE_STOPPING	5
>X#define STATE_REQ_SENT	6
>X#define STATE_ACK_RCVD	7
>X#define STATE_ACK_SENT	8
>X#define STATE_OPENED	9
>X
>Xstruct ppp_header {
>X	u_char address;
>X	u_char control;
>X	u_short protocol;
>X};
>X#define PPP_HEADER_LEN          sizeof (struct ppp_header)
>X
>Xstruct lcp_header {
>X	u_char type;
>X	u_char ident;
>X	u_short len;
>X};
>X#define LCP_HEADER_LEN          sizeof (struct lcp_header)
>X
>Xstruct cisco_packet {
>X	u_long type;
>X	u_long par1;
>X	u_long par2;
>X	u_short rel;
>X	u_short time0;
>X	u_short time1;
>X};
>X#define CISCO_PACKET_LEN 18
>X
>X/*
>X * We follow the spelling and capitalization of RFC 1661 here, to make
>X * it easier comparing with the standard.  Please refer to this RFC in
>X * case you can't make sense out of these abbreviation; it will also
>X * explain the semantics related to the various events and actions.
>X */
>Xstruct cp {
>X	u_short	proto;		/* PPP control protocol number */
>X	u_char protoidx;	/* index into state table in struct sppp */
>X	u_char flags;
>X#define CP_LCP		0x01	/* this is the LCP */
>X#define CP_AUTH		0x02	/* this is an authentication protocol */
>X#define CP_NCP		0x04	/* this is a NCP */
>X#define CP_QUAL		0x08	/* this is a quality reporting protocol */
>X	const char *name;	/* name of this control protocol */
>X	/* event handlers */
>X	void	(*Up)(struct sppp *sp);
>X	void	(*Down)(struct sppp *sp);
>X	void	(*Open)(struct sppp *sp);
>X	void	(*Close)(struct sppp *sp);
>X	void	(*TO)(void *sp);
>X	int	(*RCR)(struct sppp *sp, struct lcp_header *h, int len);
>X	void	(*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
>X	void	(*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
>X	/* actions */
>X	void	(*tlu)(struct sppp *sp);
>X	void	(*tld)(struct sppp *sp);
>X	void	(*tls)(struct sppp *sp);
>X	void	(*tlf)(struct sppp *sp);
>X	void	(*scr)(struct sppp *sp);
>X};
>X
>Xstatic struct sppp *spppq;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>Xstatic struct callout_handle keepalive_ch;
>X#endif
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#define	SPP_FMT		"%s%d: "
>X#define	SPP_ARGS(ifp)	(ifp)->if_name, (ifp)->if_unit
>X#else
>X#define	SPP_FMT		"%s: "
>X#define	SPP_ARGS(ifp)	(ifp)->if_xname
>X#endif
>X
>X/*
>X * The following disgusting hack gets around the problem that IP TOS
>X * can't be set yet.  We want to put "interactive" traffic on a high
>X * priority queue.  To decide if traffic is interactive, we check that
>X * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
>X *
>X * XXX is this really still necessary?  - joerg -
>X */
>Xstatic u_short interactive_ports[8] = {
>X	0,	513,	0,	0,
>X	0,	21,	0,	23,
>X};
>X#define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
>X
>X/* almost every function needs these */
>X#define STDDCL							\
>X	struct ifnet *ifp = &sp->pp_if;				\
>X	int debug = ifp->if_flags & IFF_DEBUG
>X
>Xstatic int sppp_output(struct ifnet *ifp, struct mbuf *m,
>X		       struct sockaddr *dst, struct rtentry *rt);
>X
>Xstatic void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
>Xstatic void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
>X
>Xstatic void sppp_cp_input(const struct cp *cp, struct sppp *sp,
>X			  struct mbuf *m);
>Xstatic void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
>X			 u_char ident, u_short len, void *data);
>X/* static void sppp_cp_timeout(void *arg); */
>Xstatic void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
>X				 int newstate);
>Xstatic void sppp_auth_send(const struct cp *cp,
>X			   struct sppp *sp, unsigned int type, unsigned int id,
>X			   ...);
>X
>Xstatic void sppp_up_event(const struct cp *cp, struct sppp *sp);
>Xstatic void sppp_down_event(const struct cp *cp, struct sppp *sp);
>Xstatic void sppp_open_event(const struct cp *cp, struct sppp *sp);
>Xstatic void sppp_close_event(const struct cp *cp, struct sppp *sp);
>Xstatic void sppp_to_event(const struct cp *cp, struct sppp *sp);
>X
>Xstatic void sppp_null(struct sppp *sp);
>X
>Xstatic void sppp_lcp_init(struct sppp *sp);
>Xstatic void sppp_lcp_up(struct sppp *sp);
>Xstatic void sppp_lcp_down(struct sppp *sp);
>Xstatic void sppp_lcp_open(struct sppp *sp);
>Xstatic void sppp_lcp_close(struct sppp *sp);
>Xstatic void sppp_lcp_TO(void *sp);
>Xstatic int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_lcp_tlu(struct sppp *sp);
>Xstatic void sppp_lcp_tld(struct sppp *sp);
>Xstatic void sppp_lcp_tls(struct sppp *sp);
>Xstatic void sppp_lcp_tlf(struct sppp *sp);
>Xstatic void sppp_lcp_scr(struct sppp *sp);
>Xstatic void sppp_lcp_check_and_close(struct sppp *sp);
>Xstatic int sppp_ncp_check(struct sppp *sp);
>X
>Xstatic void sppp_ipcp_init(struct sppp *sp);
>Xstatic void sppp_ipcp_up(struct sppp *sp);
>Xstatic void sppp_ipcp_down(struct sppp *sp);
>Xstatic void sppp_ipcp_open(struct sppp *sp);
>Xstatic void sppp_ipcp_close(struct sppp *sp);
>Xstatic void sppp_ipcp_TO(void *sp);
>Xstatic int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_ipcp_tlu(struct sppp *sp);
>Xstatic void sppp_ipcp_tld(struct sppp *sp);
>Xstatic void sppp_ipcp_tls(struct sppp *sp);
>Xstatic void sppp_ipcp_tlf(struct sppp *sp);
>Xstatic void sppp_ipcp_scr(struct sppp *sp);
>X
>Xstatic void sppp_pap_input(struct sppp *sp, struct mbuf *m);
>Xstatic void sppp_pap_init(struct sppp *sp);
>Xstatic void sppp_pap_open(struct sppp *sp);
>Xstatic void sppp_pap_close(struct sppp *sp);
>Xstatic void sppp_pap_TO(void *sp);
>Xstatic void sppp_pap_my_TO(void *sp);
>Xstatic void sppp_pap_tlu(struct sppp *sp);
>Xstatic void sppp_pap_tld(struct sppp *sp);
>Xstatic void sppp_pap_scr(struct sppp *sp);
>X
>Xstatic void sppp_chap_input(struct sppp *sp, struct mbuf *m);
>Xstatic void sppp_chap_init(struct sppp *sp);
>Xstatic void sppp_chap_open(struct sppp *sp);
>Xstatic void sppp_chap_close(struct sppp *sp);
>Xstatic void sppp_chap_TO(void *sp);
>Xstatic void sppp_chap_tlu(struct sppp *sp);
>Xstatic void sppp_chap_tld(struct sppp *sp);
>Xstatic void sppp_chap_scr(struct sppp *sp);
>X
>Xstatic const char *sppp_auth_type_name(u_short proto, u_char type);
>Xstatic const char *sppp_cp_type_name(u_char type);
>Xstatic const char *sppp_dotted_quad(u_long addr);
>Xstatic const char *sppp_ipcp_opt_name(u_char opt);
>Xstatic const char *sppp_lcp_opt_name(u_char opt);
>Xstatic const char *sppp_phase_name(enum ppp_phase phase);
>Xstatic const char *sppp_proto_name(u_short proto);
>Xstatic const char *sppp_state_name(int state);
>Xstatic int sppp_params(struct sppp *sp, u_long cmd, void *data);
>Xstatic int sppp_strnlen(u_char *p, int max);
>Xstatic void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
>X			      u_long *srcmask);
>Xstatic void sppp_keepalive(void *dummy);
>Xstatic void sppp_phase_network(struct sppp *sp);
>Xstatic void sppp_print_bytes(const u_char *p, u_short len);
>Xstatic void sppp_print_string(const char *p, u_short len);
>Xstatic void sppp_qflush(struct ifqueue *ifq);
>Xstatic void sppp_set_ip_addr(struct sppp *sp, u_long src);
>X
>X/* our control protocol descriptors */
>Xstatic const struct cp lcp = {
>X	PPP_LCP, IDX_LCP, CP_LCP, "lcp",
>X	sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
>X	sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
>X	sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
>X	sppp_lcp_scr
>X};
>X
>Xstatic const struct cp ipcp = {
>X	PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp",
>X	sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
>X	sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
>X	sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
>X	sppp_ipcp_scr
>X};
>X
>Xstatic const struct cp pap = {
>X	PPP_PAP, IDX_PAP, CP_AUTH, "pap",
>X	sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
>X	sppp_pap_TO, 0, 0, 0,
>X	sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
>X	sppp_pap_scr
>X};
>X
>Xstatic const struct cp chap = {
>X	PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
>X	sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
>X	sppp_chap_TO, 0, 0, 0,
>X	sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
>X	sppp_chap_scr
>X};
>X
>Xstatic const struct cp *cps[IDX_COUNT] = {
>X	&lcp,			/* IDX_LCP */
>X	&ipcp,			/* IDX_IPCP */
>X	&pap,			/* IDX_PAP */
>X	&chap,			/* IDX_CHAP */
>X};
>X
>X
>X/*
>X * Exported functions, comprising our interface to the lower layer.
>X */
>X
>X/*
>X * Process the received packet.
>X */
>Xvoid
>Xsppp_input(struct ifnet *ifp, struct mbuf *m)
>X{
>X	struct ppp_header *h;
>X	struct ifqueue *inq = 0;
>X	int s;
>X	struct sppp *sp = (struct sppp *)ifp;
>X	int debug = ifp->if_flags & IFF_DEBUG;
>X
>X	if (ifp->if_flags & IFF_UP)
>X		/* Count received bytes, add FCS and one flag */
>X		ifp->if_ibytes += m->m_pkthdr.len + 3;
>X
>X	if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
>X		/* Too small packet, drop it. */
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "input packet is too small, %d bytes\n",
>X			    SPP_ARGS(ifp), m->m_pkthdr.len);
>X	  drop:
>X		++ifp->if_ierrors;
>X		++ifp->if_iqdrops;
>X		m_freem (m);
>X		return;
>X	}
>X
>X	/* Get PPP header. */
>X	h = mtod (m, struct ppp_header*);
>X	m_adj (m, PPP_HEADER_LEN);
>X
>X	switch (h->address) {
>X	case PPP_ALLSTATIONS:
>X		if (h->control != PPP_UI)
>X			goto invalid;
>X		if (sp->pp_flags & PP_CISCO) {
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "PPP packet in Cisco mode "
>X				    "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
>X				    SPP_ARGS(ifp),
>X				    h->address, h->control, ntohs(h->protocol));
>X			goto drop;
>X		}
>X		switch (ntohs (h->protocol)) {
>X		default:
>X			if (sp->state[IDX_LCP] == STATE_OPENED)
>X				sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
>X					++sp->pp_seq, m->m_pkthdr.len + 2,
>X					&h->protocol);
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "invalid input protocol "
>X				    "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
>X				    SPP_ARGS(ifp),
>X				    h->address, h->control, ntohs(h->protocol));
>X			++ifp->if_noproto;
>X			goto drop;
>X		case PPP_LCP:
>X			sppp_cp_input(&lcp, sp, m);
>X			m_freem (m);
>X			return;
>X		case PPP_PAP:
>X			if (sp->pp_phase >= PHASE_AUTHENTICATE)
>X				sppp_pap_input(sp, m);
>X			m_freem (m);
>X			return;
>X		case PPP_CHAP:
>X			if (sp->pp_phase >= PHASE_AUTHENTICATE)
>X				sppp_chap_input(sp, m);
>X			m_freem (m);
>X			return;
>X#ifdef INET
>X		case PPP_IPCP:
>X			if (sp->pp_phase == PHASE_NETWORK)
>X				sppp_cp_input(&ipcp, sp, m);
>X			m_freem (m);
>X			return;
>X		case PPP_IP:
>X			if (sp->state[IDX_IPCP] == STATE_OPENED) {
>X				schednetisr (NETISR_IP);
>X				inq = &ipintrq;
>X			}
>X			break;
>X#endif
>X#ifdef IPX
>X		case PPP_IPX:
>X			/* IPX IPXCP not implemented yet */
>X			if (sp->pp_phase == PHASE_NETWORK) {
>X				schednetisr (NETISR_IPX);
>X				inq = &ipxintrq;
>X			}
>X			break;
>X#endif
>X#ifdef NS
>X		case PPP_XNS:
>X			/* XNS IDPCP not implemented yet */
>X			if (sp->pp_phase == PHASE_NETWORK) {
>X				schednetisr (NETISR_NS);
>X				inq = &nsintrq;
>X			}
>X			break;
>X#endif
>X#ifdef ISO
>X		case PPP_ISO:
>X			/* OSI NLCP not implemented yet */
>X			if (sp->pp_phase == PHASE_NETWORK) {
>X				schednetisr (NETISR_ISO);
>X				inq = &clnlintrq;
>X			}
>X			break;
>X#endif
>X		}
>X		break;
>X	case CISCO_MULTICAST:
>X	case CISCO_UNICAST:
>X		/* Don't check the control field here (RFC 1547). */
>X		if (! (sp->pp_flags & PP_CISCO)) {
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "Cisco packet in PPP mode "
>X				    "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
>X				    SPP_ARGS(ifp),
>X				    h->address, h->control, ntohs(h->protocol));
>X			goto drop;
>X		}
>X		switch (ntohs (h->protocol)) {
>X		default:
>X			++ifp->if_noproto;
>X			goto invalid;
>X		case CISCO_KEEPALIVE:
>X			sppp_cisco_input ((struct sppp*) ifp, m);
>X			m_freem (m);
>X			return;
>X#ifdef INET
>X		case ETHERTYPE_IP:
>X			schednetisr (NETISR_IP);
>X			inq = &ipintrq;
>X			break;
>X#endif
>X#ifdef IPX
>X		case ETHERTYPE_IPX:
>X			schednetisr (NETISR_IPX);
>X			inq = &ipxintrq;
>X			break;
>X#endif
>X#ifdef NS
>X		case ETHERTYPE_NS:
>X			schednetisr (NETISR_NS);
>X			inq = &nsintrq;
>X			break;
>X#endif
>X		}
>X		break;
>X	default:        /* Invalid PPP packet. */
>X	  invalid:
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "invalid input packet "
>X			    "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
>X			    SPP_ARGS(ifp),
>X			    h->address, h->control, ntohs(h->protocol));
>X		goto drop;
>X	}
>X
>X	if (! (ifp->if_flags & IFF_UP) || ! inq)
>X		goto drop;
>X
>X	/* Check queue. */
>X	s = splimp();
>X	if (IF_QFULL (inq)) {
>X		/* Queue overflow. */
>X		IF_DROP(inq);
>X		splx(s);
>X		if (debug)
>X			log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n",
>X				SPP_ARGS(ifp));
>X		goto drop;
>X	}
>X	IF_ENQUEUE(inq, m);
>X	sp->pp_last_recv = time_second;
>X	splx(s);
>X}
>X
>X/*
>X * Enqueue transmit packet.
>X */
>Xstatic int
>Xsppp_output(struct ifnet *ifp, struct mbuf *m,
>X	    struct sockaddr *dst, struct rtentry *rt)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X	struct ppp_header *h;
>X	struct ifqueue *ifq;
>X	int s, rv = 0;
>X	int debug = ifp->if_flags & IFF_DEBUG;
>X
>X	s = splimp();
>X
>X	if ((ifp->if_flags & IFF_UP) == 0 ||
>X	    (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
>X		m_freem (m);
>X		splx (s);
>X		return (ENETDOWN);
>X	}
>X
>X	if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
>X		/*
>X		 * Interface is not yet running, but auto-dial.  Need
>X		 * to start LCP for it.
>X		 */
>X		ifp->if_flags |= IFF_RUNNING;
>X		splx(s);
>X		lcp.Open(sp);
>X		s = splimp();
>X	}
>X
>X	ifq = &ifp->if_snd;
>X#ifdef INET
>X	if (dst->sa_family == AF_INET) {
>X		/* XXX Check mbuf length here? */
>X		struct ip *ip = mtod (m, struct ip*);
>X		struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
>X
>X		/*
>X		 * When using dynamic local IP address assignment by using
>X		 * 0.0.0.0 as a local address, the first TCP session will
>X		 * not connect because the local TCP checksum is computed
>X		 * using 0.0.0.0 which will later become our real IP address
>X		 * so the TCP checksum computed at the remote end will
>X		 * become invalid. So we
>X		 * - don't let packets with src ip addr 0 thru
>X		 * - we flag TCP packets with src ip 0 as an error
>X		 */	
>X
>X		if(ip->ip_src.s_addr == INADDR_ANY)	/* -hm */
>X		{
>X			m_freem(m);
>X			splx(s);
>X			if(ip->ip_p == IPPROTO_TCP)
>X				return(EADDRNOTAVAIL);
>X			else
>X				return(0);
>X		}
>X		
>X		/*
>X		 * Put low delay, telnet, rlogin and ftp control packets
>X		 * in front of the queue.
>X		 */
>X		if (IF_QFULL (&sp->pp_fastq))
>X			;
>X		else if (ip->ip_tos & IPTOS_LOWDELAY)
>X			ifq = &sp->pp_fastq;
>X		else if (m->m_len < sizeof *ip + sizeof *tcp)
>X			;
>X		else if (ip->ip_p != IPPROTO_TCP)
>X			;
>X		else if (INTERACTIVE (ntohs (tcp->th_sport)))
>X			ifq = &sp->pp_fastq;
>X		else if (INTERACTIVE (ntohs (tcp->th_dport)))
>X			ifq = &sp->pp_fastq;
>X	}
>X#endif
>X
>X	/*
>X	 * Prepend general data packet PPP header. For now, IP only.
>X	 */
>X	M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT);
>X	if (! m) {
>X		if (debug)
>X			log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
>X				SPP_ARGS(ifp));
>X		++ifp->if_oerrors;
>X		splx (s);
>X		return (ENOBUFS);
>X	}
>X	/*
>X	 * May want to check size of packet
>X	 * (albeit due to the implementation it's always enough)
>X	 */
>X	h = mtod (m, struct ppp_header*);
>X	if (sp->pp_flags & PP_CISCO) {
>X		h->address = CISCO_UNICAST;        /* unicast address */
>X		h->control = 0;
>X	} else {
>X		h->address = PPP_ALLSTATIONS;        /* broadcast address */
>X		h->control = PPP_UI;                 /* Unnumbered Info */
>X	}
>X
>X	switch (dst->sa_family) {
>X#ifdef INET
>X	case AF_INET:   /* Internet Protocol */
>X		if (sp->pp_flags & PP_CISCO)
>X			h->protocol = htons (ETHERTYPE_IP);
>X		else {
>X			/*
>X			 * Don't choke with an ENETDOWN early.  It's
>X			 * possible that we just started dialing out,
>X			 * so don't drop the packet immediately.  If
>X			 * we notice that we run out of buffer space
>X			 * below, we will however remember that we are
>X			 * not ready to carry IP packets, and return
>X			 * ENETDOWN, as opposed to ENOBUFS.
>X			 */
>X			h->protocol = htons(PPP_IP);
>X			if (sp->state[IDX_IPCP] != STATE_OPENED)
>X				rv = ENETDOWN;
>X		}
>X		break;
>X#endif
>X#ifdef NS
>X	case AF_NS:     /* Xerox NS Protocol */
>X		h->protocol = htons ((sp->pp_flags & PP_CISCO) ?
>X			ETHERTYPE_NS : PPP_XNS);
>X		break;
>X#endif
>X#ifdef IPX
>X	case AF_IPX:     /* Novell IPX Protocol */
>X		h->protocol = htons ((sp->pp_flags & PP_CISCO) ?
>X			ETHERTYPE_IPX : PPP_IPX);
>X		break;
>X#endif
>X#ifdef ISO
>X	case AF_ISO:    /* ISO OSI Protocol */
>X		if (sp->pp_flags & PP_CISCO)
>X			goto nosupport;
>X		h->protocol = htons (PPP_ISO);
>X		break;
>Xnosupport:
>X#endif
>X	default:
>X		m_freem (m);
>X		++ifp->if_oerrors;
>X		splx (s);
>X		return (EAFNOSUPPORT);
>X	}
>X
>X	/*
>X	 * Queue message on interface, and start output if interface
>X	 * not yet active.
>X	 */
>X	if (IF_QFULL (ifq)) {
>X		IF_DROP (&ifp->if_snd);
>X		m_freem (m);
>X		++ifp->if_oerrors;
>X		splx (s);
>X		return (rv? rv: ENOBUFS);
>X	}
>X	IF_ENQUEUE (ifq, m);
>X	if (! (ifp->if_flags & IFF_OACTIVE))
>X		(*ifp->if_start) (ifp);
>X
>X	/*
>X	 * Count output packets and bytes.
>X	 * The packet length includes header, FCS and 1 flag,
>X	 * according to RFC 1333.
>X	 */
>X	ifp->if_obytes += m->m_pkthdr.len + 3;
>X	sp->pp_last_sent = time_second;
>X	splx (s);
>X	return (0);
>X}
>X
>Xvoid
>Xsppp_attach(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X
>X	/* Initialize keepalive handler. */
>X	if (! spppq)
>X		TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch);
>X
>X	/* Insert new entry into the keepalive list. */
>X	sp->pp_next = spppq;
>X	spppq = sp;
>X
>X	sp->pp_if.if_mtu = PP_MTU;
>X	sp->pp_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
>X	sp->pp_if.if_type = IFT_PPP;
>X	sp->pp_if.if_output = sppp_output;
>X#if 0
>X	sp->pp_flags = PP_KEEPALIVE;
>X#endif
>X	sp->pp_fastq.ifq_maxlen = 32;
>X	sp->pp_cpq.ifq_maxlen = 20;
>X	sp->pp_loopcnt = 0;
>X	sp->pp_alivecnt = 0;
>X	sp->pp_seq = 0;
>X	sp->pp_rseq = 0;
>X	sp->pp_phase = PHASE_DEAD;
>X	sp->pp_up = lcp.Up;
>X	sp->pp_down = lcp.Down;
>X
>X	sp->pp_last_recv = sp->pp_last_sent = time_second;
>X	sppp_lcp_init(sp);
>X	sppp_ipcp_init(sp);
>X	sppp_pap_init(sp);
>X	sppp_chap_init(sp);
>X}
>X
>Xvoid
>Xsppp_detach(struct ifnet *ifp)
>X{
>X	struct sppp **q, *p, *sp = (struct sppp*) ifp;
>X	int i;
>X
>X	/* Remove the entry from the keepalive list. */
>X	for (q = &spppq; (p = *q); q = &p->pp_next)
>X		if (p == sp) {
>X			*q = p->pp_next;
>X			break;
>X		}
>X
>X	/* Stop keepalive handler. */
>X	if (! spppq)
>X		UNTIMEOUT(sppp_keepalive, 0, keepalive_ch);
>X
>X	for (i = 0; i < IDX_COUNT; i++)
>X		UNTIMEOUT((cps[i])->TO, (void *)sp, sp->ch[i]);
>X	UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
>X}
>X
>X/*
>X * Flush the interface output queue.
>X */
>Xvoid
>Xsppp_flush(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X
>X	sppp_qflush (&sp->pp_if.if_snd);
>X	sppp_qflush (&sp->pp_fastq);
>X	sppp_qflush (&sp->pp_cpq);
>X}
>X
>X/*
>X * Check if the output queue is empty.
>X */
>Xint
>Xsppp_isempty(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X	int empty, s;
>X
>X	s = splimp();
>X	empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head &&
>X		!sp->pp_if.if_snd.ifq_head;
>X	splx(s);
>X	return (empty);
>X}
>X
>X/*
>X * Get next packet to send.
>X */
>Xstruct mbuf *
>Xsppp_dequeue(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X	struct mbuf *m;
>X	int s;
>X
>X	s = splimp();
>X	/*
>X	 * Process only the control protocol queue until we have at
>X	 * least one NCP open.
>X	 *
>X	 * Do always serve all three queues in Cisco mode.
>X	 */
>X	IF_DEQUEUE(&sp->pp_cpq, m);
>X	if (m == NULL &&
>X	    (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) {
>X		IF_DEQUEUE(&sp->pp_fastq, m);
>X		if (m == NULL)
>X			IF_DEQUEUE (&sp->pp_if.if_snd, m);
>X	}
>X	splx(s);
>X	return m;
>X}
>X
>X/*
>X * Pick the next packet, do not remove it from the queue.
>X */
>Xstruct mbuf *
>Xsppp_pick(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*)ifp;
>X	struct mbuf *m;
>X	int s;
>X
>X	s= splimp ();
>X
>X	m = sp->pp_cpq.ifq_head;
>X	if (m == NULL &&
>X	    (sp->pp_phase == PHASE_NETWORK ||
>X	     (sp->pp_flags & PP_CISCO) != 0))
>X		if ((m = sp->pp_fastq.ifq_head) == NULL)
>X			m = sp->pp_if.if_snd.ifq_head;
>X	splx (s);
>X	return (m);
>X}
>X
>X/*
>X * Process an ioctl request.  Called on low priority level.
>X */
>Xint
>Xsppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
>X{
>X	struct ifreq *ifr = (struct ifreq*) data;
>X	struct sppp *sp = (struct sppp*) ifp;
>X	int s, rv, going_up, going_down, newmode;
>X
>X	s = splimp();
>X	rv = 0;
>X	switch (cmd) {
>X	case SIOCAIFADDR:
>X	case SIOCSIFDSTADDR:
>X		break;
>X
>X	case SIOCSIFADDR:
>X		if_up(ifp);
>X		/* fall through... */
>X
>X	case SIOCSIFFLAGS:
>X		going_up = ifp->if_flags & IFF_UP &&
>X			(ifp->if_flags & IFF_RUNNING) == 0;
>X		going_down = (ifp->if_flags & IFF_UP) == 0 &&
>X			ifp->if_flags & IFF_RUNNING;
>X		newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE);
>X		if (newmode == (IFF_AUTO | IFF_PASSIVE)) {
>X			/* sanity */
>X			newmode = IFF_PASSIVE;
>X			ifp->if_flags &= ~IFF_AUTO;
>X		}
>X
>X		if (going_up || going_down)
>X			lcp.Close(sp);
>X		if (going_up && newmode == 0) {
>X			/* neither auto-dial nor passive */
>X			ifp->if_flags |= IFF_RUNNING;
>X			if (!(sp->pp_flags & PP_CISCO))
>X				lcp.Open(sp);
>X		} else if (going_down) {
>X			sppp_flush(ifp);
>X			ifp->if_flags &= ~IFF_RUNNING;
>X		}
>X
>X		break;
>X
>X#ifdef SIOCSIFMTU
>X#ifndef ifr_mtu
>X#define ifr_mtu ifr_metric
>X#endif
>X	case SIOCSIFMTU:
>X		if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
>X			return (EINVAL);
>X		ifp->if_mtu = ifr->ifr_mtu;
>X		break;
>X#endif
>X#ifdef SLIOCSETMTU
>X	case SLIOCSETMTU:
>X		if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
>X			return (EINVAL);
>X		ifp->if_mtu = *(short*)data;
>X		break;
>X#endif
>X#ifdef SIOCGIFMTU
>X	case SIOCGIFMTU:
>X		ifr->ifr_mtu = ifp->if_mtu;
>X		break;
>X#endif
>X#ifdef SLIOCGETMTU
>X	case SLIOCGETMTU:
>X		*(short*)data = ifp->if_mtu;
>X		break;
>X#endif
>X	case SIOCADDMULTI:
>X	case SIOCDELMULTI:
>X		break;
>X
>X	case SIOCGIFGENERIC:
>X	case SIOCSIFGENERIC:
>X		rv = sppp_params(sp, cmd, data);
>X		break;
>X
>X	default:
>X		rv = ENOTTY;
>X	}
>X	splx(s);
>X	return rv;
>X}
>X
>X
>X/*
>X * Cisco framing implementation.
>X */
>X
>X/*
>X * Handle incoming Cisco keepalive protocol packets.
>X */
>Xstatic void
>Xsppp_cisco_input(struct sppp *sp, struct mbuf *m)
>X{
>X	STDDCL;
>X	struct cisco_packet *h;
>X	u_long me, mymask;
>X
>X	if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "cisco invalid packet length: %d bytes\n",
>X			    SPP_ARGS(ifp), m->m_pkthdr.len);
>X		return;
>X	}
>X	h = mtod (m, struct cisco_packet*);
>X	if (debug)
>X		log(LOG_DEBUG,
>X		    SPP_FMT "cisco input: %d bytes "
>X		    "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
>X		    SPP_ARGS(ifp), m->m_pkthdr.len,
>X		    (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
>X		    (u_int)h->time0, (u_int)h->time1);
>X	switch (ntohl (h->type)) {
>X	default:
>X		if (debug)
>X			addlog(SPP_FMT "cisco unknown packet type: 0x%lx\n",
>X			       SPP_ARGS(ifp), (u_long)ntohl (h->type));
>X		break;
>X	case CISCO_ADDR_REPLY:
>X		/* Reply on address request, ignore */
>X		break;
>X	case CISCO_KEEPALIVE_REQ:
>X		sp->pp_alivecnt = 0;
>X		sp->pp_rseq = ntohl (h->par1);
>X		if (sp->pp_seq == sp->pp_rseq) {
>X			/* Local and remote sequence numbers are equal.
>X			 * Probably, the line is in loopback mode. */
>X			if (sp->pp_loopcnt >= MAXALIVECNT) {
>X				printf (SPP_FMT "loopback\n",
>X					SPP_ARGS(ifp));
>X				sp->pp_loopcnt = 0;
>X				if (ifp->if_flags & IFF_UP) {
>X					if_down (ifp);
>X					sppp_qflush (&sp->pp_cpq);
>X				}
>X			}
>X			++sp->pp_loopcnt;
>X
>X			/* Generate new local sequence number */
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X			sp->pp_seq = random();
>X#else
>X			sp->pp_seq ^= time.tv_sec ^ time.tv_usec;
>X#endif
>X			break;
>X		}
>X		sp->pp_loopcnt = 0;
>X		if (! (ifp->if_flags & IFF_UP) &&
>X		    (ifp->if_flags & IFF_RUNNING)) {
>X			if_up(ifp);
>X			printf (SPP_FMT "up\n", SPP_ARGS(ifp));
>X		}
>X		break;
>X	case CISCO_ADDR_REQ:
>X		sppp_get_ip_addrs(sp, &me, 0, &mymask);
>X		if (me != 0L)
>X			sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
>X		break;
>X	}
>X}
>X
>X/*
>X * Send Cisco keepalive packet.
>X */
>Xstatic void
>Xsppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
>X{
>X	STDDCL;
>X	struct ppp_header *h;
>X	struct cisco_packet *ch;
>X	struct mbuf *m;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	struct timeval tv;
>X#else
>X	u_long t = (time.tv_sec - boottime.tv_sec) * 1000;
>X#endif
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	getmicrouptime(&tv);
>X#endif
>X	
>X	MGETHDR (m, M_DONTWAIT, MT_DATA);
>X	if (! m)
>X		return;
>X	m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
>X	m->m_pkthdr.rcvif = 0;
>X
>X	h = mtod (m, struct ppp_header*);
>X	h->address = CISCO_MULTICAST;
>X	h->control = 0;
>X	h->protocol = htons (CISCO_KEEPALIVE);
>X
>X	ch = (struct cisco_packet*) (h + 1);
>X	ch->type = htonl (type);
>X	ch->par1 = htonl (par1);
>X	ch->par2 = htonl (par2);
>X	ch->rel = -1;
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
>X	ch->time1 = htons ((u_short) tv.tv_sec);
>X#else
>X	ch->time0 = htons ((u_short) (t >> 16));
>X	ch->time1 = htons ((u_short) t);
>X#endif
>X
>X	if (debug)
>X		log(LOG_DEBUG,
>X		    SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
>X			SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
>X			(u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
>X
>X	if (IF_QFULL (&sp->pp_cpq)) {
>X		IF_DROP (&sp->pp_fastq);
>X		IF_DROP (&ifp->if_snd);
>X		m_freem (m);
>X	} else
>X		IF_ENQUEUE (&sp->pp_cpq, m);
>X	if (! (ifp->if_flags & IFF_OACTIVE))
>X		(*ifp->if_start) (ifp);
>X	ifp->if_obytes += m->m_pkthdr.len + 3;
>X}
>X
>X/*
>X * PPP protocol implementation.
>X */
>X
>X/*
>X * Send PPP control protocol packet.
>X */
>Xstatic void
>Xsppp_cp_send(struct sppp *sp, u_short proto, u_char type,
>X	     u_char ident, u_short len, void *data)
>X{
>X	STDDCL;
>X	struct ppp_header *h;
>X	struct lcp_header *lh;
>X	struct mbuf *m;
>X
>X	if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
>X		len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
>X	MGETHDR (m, M_DONTWAIT, MT_DATA);
>X	if (! m)
>X		return;
>X	m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
>X	m->m_pkthdr.rcvif = 0;
>X
>X	h = mtod (m, struct ppp_header*);
>X	h->address = PPP_ALLSTATIONS;        /* broadcast address */
>X	h->control = PPP_UI;                 /* Unnumbered Info */
>X	h->protocol = htons (proto);         /* Link Control Protocol */
>X
>X	lh = (struct lcp_header*) (h + 1);
>X	lh->type = type;
>X	lh->ident = ident;
>X	lh->len = htons (LCP_HEADER_LEN + len);
>X	if (len)
>X		bcopy (data, lh+1, len);
>X
>X	if (debug) {
>X		log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
>X		    SPP_ARGS(ifp),
>X		    sppp_proto_name(proto),
>X		    sppp_cp_type_name (lh->type), lh->ident,
>X		    ntohs (lh->len));
>X		if (len)
>X			sppp_print_bytes ((u_char*) (lh+1), len);
>X		addlog(">\n");
>X	}
>X	if (IF_QFULL (&sp->pp_cpq)) {
>X		IF_DROP (&sp->pp_fastq);
>X		IF_DROP (&ifp->if_snd);
>X		m_freem (m);
>X		++ifp->if_oerrors;
>X	} else
>X		IF_ENQUEUE (&sp->pp_cpq, m);
>X	if (! (ifp->if_flags & IFF_OACTIVE))
>X		(*ifp->if_start) (ifp);
>X	ifp->if_obytes += m->m_pkthdr.len + 3;
>X}
>X
>X/*
>X * Handle incoming PPP control protocol packets.
>X */
>Xstatic void
>Xsppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
>X{
>X	STDDCL;
>X	struct lcp_header *h;
>X	int len = m->m_pkthdr.len;
>X	int rv;
>X	u_char *p;
>X
>X	if (len < 4) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "%s invalid packet length: %d bytes\n",
>X			    SPP_ARGS(ifp), cp->name, len);
>X		return;
>X	}
>X	h = mtod (m, struct lcp_header*);
>X	if (debug) {
>X		log(LOG_DEBUG,
>X		    SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]),
>X		    sppp_cp_type_name (h->type), h->ident, ntohs (h->len));
>X		if (len > 4)
>X			sppp_print_bytes ((u_char*) (h+1), len-4);
>X		addlog(">\n");
>X	}
>X	if (len > ntohs (h->len))
>X		len = ntohs (h->len);
>X	p = (u_char *)(h + 1);
>X	switch (h->type) {
>X	case CONF_REQ:
>X		if (len < 4) {
>X			if (debug)
>X				addlog(SPP_FMT "%s invalid conf-req length %d\n",
>X				       SPP_ARGS(ifp), cp->name,
>X				       len);
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		/* handle states where RCR doesn't get a SCA/SCN */
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X			return;
>X		case STATE_CLOSED:
>X			sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
>X				     0, 0);
>X			return;
>X		}
>X		rv = (cp->RCR)(sp, h, len);
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			(cp->scr)(sp);
>X			/* fall through... */
>X		case STATE_ACK_SENT:
>X		case STATE_REQ_SENT:
>X			sppp_cp_change_state(cp, sp, rv?
>X					     STATE_ACK_SENT: STATE_REQ_SENT);
>X			break;
>X		case STATE_STOPPED:
>X			sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X			(cp->scr)(sp);
>X			sppp_cp_change_state(cp, sp, rv?
>X					     STATE_ACK_SENT: STATE_REQ_SENT);
>X			break;
>X		case STATE_ACK_RCVD:
>X			if (rv) {
>X				sppp_cp_change_state(cp, sp, STATE_OPENED);
>X				if (debug)
>X					log(LOG_DEBUG, SPP_FMT "%s tlu\n",
>X					    SPP_ARGS(ifp),
>X					    cp->name);
>X				(cp->tlu)(sp);
>X			} else
>X				sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case CONF_ACK:
>X		if (h->ident != sp->confid[cp->protoidx]) {
>X			if (debug)
>X				addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
>X				       SPP_ARGS(ifp), cp->name,
>X				       h->ident, sp->confid[cp->protoidx]);
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X			sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
>X			break;
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X			break;
>X		case STATE_REQ_SENT:
>X			sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X			sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
>X			break;
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			/* fall through */
>X		case STATE_ACK_RCVD:
>X			(cp->scr)(sp);
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			break;
>X		case STATE_ACK_SENT:
>X			sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X			sppp_cp_change_state(cp, sp, STATE_OPENED);
>X			if (debug)
>X				log(LOG_DEBUG, SPP_FMT "%s tlu\n",
>X				       SPP_ARGS(ifp), cp->name);
>X			(cp->tlu)(sp);
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case CONF_NAK:
>X	case CONF_REJ:
>X		if (h->ident != sp->confid[cp->protoidx]) {
>X			if (debug)
>X				addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
>X				       SPP_ARGS(ifp), cp->name,
>X				       h->ident, sp->confid[cp->protoidx]);
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		if (h->type == CONF_NAK)
>X			(cp->RCN_nak)(sp, h, len);
>X		else /* CONF_REJ */
>X			(cp->RCN_rej)(sp, h, len);
>X
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X			sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
>X			break;
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_SENT:
>X			sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X			(cp->scr)(sp);
>X			break;
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			/* fall through */
>X		case STATE_ACK_RCVD:
>X			sppp_cp_change_state(cp, sp, STATE_ACK_SENT);
>X			(cp->scr)(sp);
>X			break;
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X
>X	case TERM_REQ:
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_ACK_RCVD:
>X		case STATE_ACK_SENT:
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			/* fall through */
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X		case STATE_REQ_SENT:
>X		  sta:
>X			/* Send Terminate-Ack packet. */
>X			if (debug)
>X				log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
>X				    SPP_ARGS(ifp), cp->name);
>X			sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
>X			break;
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			sp->rst_counter[cp->protoidx] = 0;
>X			sppp_cp_change_state(cp, sp, STATE_STOPPING);
>X			goto sta;
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case TERM_ACK:
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_SENT:
>X			break;
>X		case STATE_CLOSING:
>X			sppp_cp_change_state(cp, sp, STATE_CLOSED);
>X			(cp->tlf)(sp);
>X			break;
>X		case STATE_STOPPING:
>X			sppp_cp_change_state(cp, sp, STATE_STOPPED);
>X			(cp->tlf)(sp);
>X			break;
>X		case STATE_ACK_RCVD:
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			break;
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			(cp->scr)(sp);
>X			sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case CODE_REJ:
>X	case PROTO_REJ:
>X		/* XXX catastrophic rejects (RXJ-) aren't handled yet. */
>X		log(LOG_INFO,
>X		    SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
>X		    "danger will robinson\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_SENT:
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X		case STATE_OPENED:
>X			break;
>X		case STATE_ACK_RCVD:
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case DISC_REQ:
>X		if (cp->proto != PPP_LCP)
>X			goto illegal;
>X		/* Discard the packet. */
>X		break;
>X	case ECHO_REQ:
>X		if (cp->proto != PPP_LCP)
>X			goto illegal;
>X		if (sp->state[cp->protoidx] != STATE_OPENED) {
>X			if (debug)
>X				addlog(SPP_FMT "lcp echo req but lcp closed\n",
>X				       SPP_ARGS(ifp));
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		if (len < 8) {
>X			if (debug)
>X				addlog(SPP_FMT "invalid lcp echo request "
>X				       "packet length: %d bytes\n",
>X				       SPP_ARGS(ifp), len);
>X			break;
>X		}
>X		if (ntohl (*(long*)(h+1)) == sp->lcp.magic) {
>X			/* Line loopback mode detected. */
>X			printf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
>X			if_down (ifp);
>X			sppp_qflush (&sp->pp_cpq);
>X
>X			/* Shut down the PPP link. */
>X			/* XXX */
>X			lcp.Down(sp);
>X			lcp.Up(sp);
>X			break;
>X		}
>X		*(long*)(h+1) = htonl (sp->lcp.magic);
>X		if (debug)
>X			addlog(SPP_FMT "got lcp echo req, sending echo rep\n",
>X			       SPP_ARGS(ifp));
>X		sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
>X		break;
>X	case ECHO_REPLY:
>X		if (cp->proto != PPP_LCP)
>X			goto illegal;
>X		if (h->ident != sp->lcp.echoid) {
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		if (len < 8) {
>X			if (debug)
>X				addlog(SPP_FMT "lcp invalid echo reply "
>X				       "packet length: %d bytes\n",
>X				       SPP_ARGS(ifp), len);
>X			break;
>X		}
>X		if (debug)
>X			addlog(SPP_FMT "lcp got echo rep\n",
>X			       SPP_ARGS(ifp));
>X		if (ntohl (*(long*)(h+1)) != sp->lcp.magic)
>X			sp->pp_alivecnt = 0;
>X		break;
>X	default:
>X		/* Unknown packet type -- send Code-Reject packet. */
>X	  illegal:
>X		if (debug)
>X			addlog(SPP_FMT "%s send code-rej for 0x%x\n",
>X			       SPP_ARGS(ifp), cp->name, h->type);
>X		sppp_cp_send(sp, cp->proto, CODE_REJ, ++sp->pp_seq,
>X			     m->m_pkthdr.len, h);
>X		++ifp->if_ierrors;
>X	}
>X}
>X
>X
>X/*
>X * The generic part of all Up/Down/Open/Close/TO event handlers.
>X * Basically, the state transition handling in the automaton.
>X */
>Xstatic void
>Xsppp_up_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]));
>X
>X	switch (sp->state[cp->protoidx]) {
>X	case STATE_INITIAL:
>X		sppp_cp_change_state(cp, sp, STATE_CLOSED);
>X		break;
>X	case STATE_STARTING:
>X		sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X		(cp->scr)(sp);
>X		sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X		break;
>X	default:
>X		printf(SPP_FMT "%s illegal up in state %s\n",
>X		       SPP_ARGS(ifp), cp->name,
>X		       sppp_state_name(sp->state[cp->protoidx]));
>X	}
>X}
>X
>Xstatic void
>Xsppp_down_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]));
>X
>X	switch (sp->state[cp->protoidx]) {
>X	case STATE_CLOSED:
>X	case STATE_CLOSING:
>X		sppp_cp_change_state(cp, sp, STATE_INITIAL);
>X		break;
>X	case STATE_STOPPED:
>X		sppp_cp_change_state(cp, sp, STATE_STARTING);
>X		(cp->tls)(sp);
>X		break;
>X	case STATE_STOPPING:
>X	case STATE_REQ_SENT:
>X	case STATE_ACK_RCVD:
>X	case STATE_ACK_SENT:
>X		sppp_cp_change_state(cp, sp, STATE_STARTING);
>X		break;
>X	case STATE_OPENED:
>X		(cp->tld)(sp);
>X		sppp_cp_change_state(cp, sp, STATE_STARTING);
>X		break;
>X	default:
>X		printf(SPP_FMT "%s illegal down in state %s\n",
>X		       SPP_ARGS(ifp), cp->name,
>X		       sppp_state_name(sp->state[cp->protoidx]));
>X	}
>X}
>X
>X
>Xstatic void
>Xsppp_open_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]));
>X
>X	switch (sp->state[cp->protoidx]) {
>X	case STATE_INITIAL:
>X		sppp_cp_change_state(cp, sp, STATE_STARTING);
>X		(cp->tls)(sp);
>X		break;
>X	case STATE_STARTING:
>X		break;
>X	case STATE_CLOSED:
>X		sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X		(cp->scr)(sp);
>X		sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X		break;
>X	case STATE_STOPPED:
>X	case STATE_STOPPING:
>X	case STATE_REQ_SENT:
>X	case STATE_ACK_RCVD:
>X	case STATE_ACK_SENT:
>X	case STATE_OPENED:
>X		break;
>X	case STATE_CLOSING:
>X		sppp_cp_change_state(cp, sp, STATE_STOPPING);
>X		break;
>X	}
>X}
>X
>X
>Xstatic void
>Xsppp_close_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]));
>X
>X	switch (sp->state[cp->protoidx]) {
>X	case STATE_INITIAL:
>X	case STATE_CLOSED:
>X	case STATE_CLOSING:
>X		break;
>X	case STATE_STARTING:
>X		sppp_cp_change_state(cp, sp, STATE_INITIAL);
>X		(cp->tlf)(sp);
>X		break;
>X	case STATE_STOPPED:
>X		sppp_cp_change_state(cp, sp, STATE_CLOSED);
>X		break;
>X	case STATE_STOPPING:
>X		sppp_cp_change_state(cp, sp, STATE_CLOSING);
>X		break;
>X	case STATE_OPENED:
>X		(cp->tld)(sp);
>X		/* fall through */
>X	case STATE_REQ_SENT:
>X	case STATE_ACK_RCVD:
>X	case STATE_ACK_SENT:
>X		sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
>X		sppp_cp_send(sp, cp->proto, TERM_REQ, ++sp->pp_seq, 0, 0);
>X		sppp_cp_change_state(cp, sp, STATE_CLOSING);
>X		break;
>X	}
>X}
>X
>Xstatic void
>Xsppp_to_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X	int s;
>X
>X	s = splimp();
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]),
>X		    sp->rst_counter[cp->protoidx]);
>X
>X	if (--sp->rst_counter[cp->protoidx] < 0)
>X		/* TO- event */
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSING:
>X			sppp_cp_change_state(cp, sp, STATE_CLOSED);
>X			(cp->tlf)(sp);
>X			break;
>X		case STATE_STOPPING:
>X			sppp_cp_change_state(cp, sp, STATE_STOPPED);
>X			(cp->tlf)(sp);
>X			break;
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_RCVD:
>X		case STATE_ACK_SENT:
>X			sppp_cp_change_state(cp, sp, STATE_STOPPED);
>X			(cp->tlf)(sp);
>X			break;
>X		}
>X	else
>X		/* TO+ event */
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X			sppp_cp_send(sp, cp->proto, TERM_REQ, ++sp->pp_seq,
>X				     0, 0);
>X			TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout, 
>X			    sp->ch[cp->protoidx]);
>X			break;
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_RCVD:
>X			(cp->scr)(sp);
>X			/* sppp_cp_change_state() will restart the timer */
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			break;
>X		case STATE_ACK_SENT:
>X			(cp->scr)(sp);
>X			TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout,
>X			    sp->ch[cp->protoidx]);
>X			break;
>X		}
>X
>X	splx(s);
>X}
>X
>X/*
>X * Change the state of a control protocol in the state automaton.
>X * Takes care of starting/stopping the restart timer.
>X */
>Xvoid
>Xsppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
>X{
>X	sp->state[cp->protoidx] = newstate;
>X
>X	UNTIMEOUT(cp->TO, (void *)sp, sp->ch[cp->protoidx]);
>X	switch (newstate) {
>X	case STATE_INITIAL:
>X	case STATE_STARTING:
>X	case STATE_CLOSED:
>X	case STATE_STOPPED:
>X	case STATE_OPENED:
>X		break;
>X	case STATE_CLOSING:
>X	case STATE_STOPPING:
>X	case STATE_REQ_SENT:
>X	case STATE_ACK_RCVD:
>X	case STATE_ACK_SENT:
>X		TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout, 
>X		    sp->ch[cp->protoidx]);
>X		break;
>X	}
>X}
>X/*
>X *--------------------------------------------------------------------------*
>X *                                                                          *
>X *                         The LCP implementation.                          *
>X *                                                                          *
>X *--------------------------------------------------------------------------*
>X */
>Xstatic void
>Xsppp_lcp_init(struct sppp *sp)
>X{
>X	sp->lcp.opts = (1 << LCP_OPT_MAGIC);
>X	sp->lcp.magic = 0;
>X	sp->state[IDX_LCP] = STATE_INITIAL;
>X	sp->fail_counter[IDX_LCP] = 0;
>X	sp->lcp.protos = 0;
>X	sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
>X
>X	/*
>X	 * Initialize counters and timeout values.  Note that we don't
>X	 * use the 3 seconds suggested in RFC 1661 since we are likely
>X	 * running on a fast link.  XXX We should probably implement
>X	 * the exponential backoff option.  Note that these values are
>X	 * relevant for all control protocols, not just LCP only.
>X	 */
>X	sp->lcp.timeout = 1 * hz;
>X	sp->lcp.max_terminate = 2;
>X	sp->lcp.max_configure = 10;
>X	sp->lcp.max_failure = 10;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	callout_handle_init(&sp->ch[IDX_LCP]);
>X#endif
>X}
>X
>Xstatic void
>Xsppp_lcp_up(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	/*
>X	 * If this interface is passive or dial-on-demand, and we are
>X	 * still in Initial state, it means we've got an incoming
>X	 * call.  Activate the interface.
>X	 */
>X	if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "Up event", SPP_ARGS(ifp));
>X		ifp->if_flags |= IFF_RUNNING;
>X		if (sp->state[IDX_LCP] == STATE_INITIAL) {
>X			if (debug)
>X				addlog("(incoming call)\n");
>X			sp->pp_flags |= PP_CALLIN;
>X			lcp.Open(sp);
>X		} else if (debug)
>X			addlog("\n");
>X	}
>X
>X	sppp_up_event(&lcp, sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_down(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	sppp_down_event(&lcp, sp);
>X
>X	/*
>X	 * If this is neither a dial-on-demand nor a passive
>X	 * interface, simulate an ``ifconfig down'' action, so the
>X	 * administrator can force a redial by another ``ifconfig
>X	 * up''.  XXX For leased line operation, should we immediately
>X	 * try to reopen the connection here?
>X	 */
>X	if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
>X		log(LOG_INFO,
>X		    SPP_FMT "Down event, taking interface down.\n",
>X		    SPP_ARGS(ifp));
>X		if_down(ifp);
>X	} else {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "Down event (carrier loss)\n",
>X			    SPP_ARGS(ifp));
>X	}
>X	sp->pp_flags &= ~PP_CALLIN;
>X	if (sp->state[IDX_LCP] != STATE_INITIAL)
>X		lcp.Close(sp);
>X	ifp->if_flags &= ~IFF_RUNNING;
>X}
>X
>Xstatic void
>Xsppp_lcp_open(struct sppp *sp)
>X{
>X	/*
>X	 * If we are authenticator, negotiate LCP_AUTH
>X	 */
>X	if (sp->hisauth.proto != 0)
>X		sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
>X	else
>X		sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
>X	sp->pp_flags &= ~PP_NEEDAUTH;
>X	sppp_open_event(&lcp, sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_close(struct sppp *sp)
>X{
>X	sppp_close_event(&lcp, sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_TO(void *cookie)
>X{
>X	sppp_to_event(&lcp, (struct sppp *)cookie);
>X}
>X
>X/*
>X * Analyze a configure request.  Return true if it was agreeable, and
>X * caused action sca, false if it has been rejected or nak'ed, and
>X * caused action scn.  (The return value is used to make the state
>X * transition decision in the state automaton.)
>X */
>Xstatic int
>Xsppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	STDDCL;
>X	u_char *buf, *r, *p;
>X	int origlen, rlen;
>X	u_long nmagic;
>X	u_short authproto;
>X
>X	len -= 4;
>X	origlen = len;
>X	buf = r = malloc (len, M_TEMP, M_NOWAIT);
>X	if (! buf)
>X		return (0);
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	/* pass 1: check for things that need to be rejected */
>X	p = (void*) (h+1);
>X	for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_lcp_opt_name(*p));
>X		switch (*p) {
>X		case LCP_OPT_MAGIC:
>X			/* Magic number. */
>X			/* fall through, both are same length */
>X		case LCP_OPT_ASYNC_MAP:
>X			/* Async control character map. */
>X			if (len >= 6 || p[1] == 6)
>X				continue;
>X			if (debug)
>X				addlog("[invalid] ");
>X			break;
>X		case LCP_OPT_MRU:
>X			/* Maximum receive unit. */
>X			if (len >= 4 && p[1] == 4)
>X				continue;
>X			if (debug)
>X				addlog("[invalid] ");
>X			break;
>X		case LCP_OPT_AUTH_PROTO:
>X			if (len < 4) {
>X				if (debug)
>X					addlog("[invalid] ");
>X				break;
>X			}
>X			authproto = (p[2] << 8) + p[3];
>X			if (authproto == PPP_CHAP && p[1] != 5) {
>X				if (debug)
>X					addlog("[invalid chap len] ");
>X				break;
>X			}
>X			if (sp->myauth.proto == 0) {
>X				/* we are not configured to do auth */
>X				if (debug)
>X					addlog("[not configured] ");
>X				break;
>X			}
>X			/*
>X			 * Remote want us to authenticate, remember this,
>X			 * so we stay in PHASE_AUTHENTICATE after LCP got
>X			 * up.
>X			 */
>X			sp->pp_flags |= PP_NEEDAUTH;
>X			continue;
>X		default:
>X			/* Others not supported. */
>X			if (debug)
>X				addlog("[rej] ");
>X			break;
>X		}
>X		/* Add the option to rejected list. */
>X		bcopy (p, r, p[1]);
>X		r += p[1];
>X		rlen += p[1];
>X	}
>X	if (rlen) {
>X		if (debug)
>X			addlog(" send conf-rej\n");
>X		sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
>X		return 0;
>X	} else if (debug)
>X		addlog("\n");
>X
>X	/*
>X	 * pass 2: check for option values that are unacceptable and
>X	 * thus require to be nak'ed.
>X	 */
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	len = origlen;
>X	for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_lcp_opt_name(*p));
>X		switch (*p) {
>X		case LCP_OPT_MAGIC:
>X			/* Magic number -- extract. */
>X			nmagic = (u_long)p[2] << 24 |
>X				(u_long)p[3] << 16 | p[4] << 8 | p[5];
>X			if (nmagic != sp->lcp.magic) {
>X				if (debug)
>X					addlog("0x%lx ", nmagic);
>X				continue;
>X			}
>X			/*
>X			 * Local and remote magics equal -- loopback?
>X			 */
>X			if (sp->pp_loopcnt >= MAXALIVECNT*5) {
>X				printf (SPP_FMT "loopback\n",
>X					SPP_ARGS(ifp));
>X				sp->pp_loopcnt = 0;
>X				if (ifp->if_flags & IFF_UP) {
>X					if_down(ifp);
>X					sppp_qflush(&sp->pp_cpq);
>X					/* XXX ? */
>X					lcp.Down(sp);
>X					lcp.Up(sp);
>X				}
>X			} else if (debug)
>X				addlog("[glitch] ");
>X			++sp->pp_loopcnt;
>X			/*
>X			 * We negate our magic here, and NAK it.  If
>X			 * we see it later in an NAK packet, we
>X			 * suggest a new one.
>X			 */
>X			nmagic = ~sp->lcp.magic;
>X			/* Gonna NAK it. */
>X			p[2] = nmagic >> 24;
>X			p[3] = nmagic >> 16;
>X			p[4] = nmagic >> 8;
>X			p[5] = nmagic;
>X			break;
>X
>X		case LCP_OPT_ASYNC_MAP:
>X			/* Async control character map -- check to be zero. */
>X			if (! p[2] && ! p[3] && ! p[4] && ! p[5]) {
>X				if (debug)
>X					addlog("[empty] ");
>X				continue;
>X			}
>X			if (debug)
>X				addlog("[non-empty] ");
>X			/* suggest a zero one */
>X			p[2] = p[3] = p[4] = p[5] = 0;
>X			break;
>X
>X		case LCP_OPT_MRU:
>X			/*
>X			 * Maximum receive unit.  Always agreeable,
>X			 * but ignored by now.
>X			 */
>X			sp->lcp.their_mru = p[2] * 256 + p[3];
>X			if (debug)
>X				addlog("%lu ", sp->lcp.their_mru);
>X			continue;
>X
>X		case LCP_OPT_AUTH_PROTO:
>X			authproto = (p[2] << 8) + p[3];
>X			if (sp->myauth.proto != authproto) {
>X				/* not agreed, nak */
>X				if (debug)
>X					addlog("[mine %s != his %s] ",
>X					       sppp_proto_name(sp->hisauth.proto),
>X					       sppp_proto_name(authproto));
>X				p[2] = sp->myauth.proto >> 8;
>X				p[3] = sp->myauth.proto;
>X				break;
>X			}
>X			if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
>X				if (debug)
>X					addlog("[chap not MD5] ");
>X				p[4] = CHAP_MD5;
>X				break;
>X			}
>X			continue;
>X		}
>X		/* Add the option to nak'ed list. */
>X		bcopy (p, r, p[1]);
>X		r += p[1];
>X		rlen += p[1];
>X	}
>X	if (rlen) {
>X		if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
>X			if (debug)
>X				addlog(" max_failure (%d) exceeded, "
>X				       "send conf-rej\n",
>X				       sp->lcp.max_failure);
>X			sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
>X		} else {
>X			if (debug)
>X				addlog(" send conf-nak\n");
>X			sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
>X		}
>X		return 0;
>X	} else {
>X		if (debug)
>X			addlog(" send conf-ack\n");
>X		sp->fail_counter[IDX_LCP] = 0;
>X		sp->pp_loopcnt = 0;
>X		sppp_cp_send (sp, PPP_LCP, CONF_ACK,
>X			      h->ident, origlen, h+1);
>X	}
>X
>X	free (buf, M_TEMP);
>X	return (rlen == 0);
>X}
>X
>X/*
>X * Analyze the LCP Configure-Reject option list, and adjust our
>X * negotiation.
>X */
>Xstatic void
>Xsppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	STDDCL;
>X	u_char *buf, *p;
>X
>X	len -= 4;
>X	buf = malloc (len, M_TEMP, M_NOWAIT);
>X	if (!buf)
>X		return;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_lcp_opt_name(*p));
>X		switch (*p) {
>X		case LCP_OPT_MAGIC:
>X			/* Magic number -- can't use it, use 0 */
>X			sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
>X			sp->lcp.magic = 0;
>X			break;
>X		case LCP_OPT_MRU:
>X			/*
>X			 * Should not be rejected anyway, since we only
>X			 * negotiate a MRU if explicitly requested by
>X			 * peer.
>X			 */
>X			sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
>X			break;
>X		case LCP_OPT_AUTH_PROTO:
>X			/*
>X			 * Peer doesn't want to authenticate himself,
>X			 * deny unless this is a dialout call, and
>X			 * AUTHFLAG_NOCALLOUT is set.
>X			 */
>X			if ((sp->pp_flags & PP_CALLIN) == 0 &&
>X			    (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
>X				if (debug)
>X					addlog("[don't insist on auth "
>X					       "for callout]");
>X				sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
>X				break;
>X			}
>X			if (debug)
>X				addlog("[access denied]\n");
>X			lcp.Close(sp);
>X			break;
>X		}
>X	}
>X	if (debug)
>X		addlog("\n");
>X	free (buf, M_TEMP);
>X	return;
>X}
>X
>X/*
>X * Analyze the LCP Configure-NAK option list, and adjust our
>X * negotiation.
>X */
>Xstatic void
>Xsppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	STDDCL;
>X	u_char *buf, *p;
>X	u_long magic;
>X
>X	len -= 4;
>X	buf = malloc (len, M_TEMP, M_NOWAIT);
>X	if (!buf)
>X		return;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_lcp_opt_name(*p));
>X		switch (*p) {
>X		case LCP_OPT_MAGIC:
>X			/* Magic number -- renegotiate */
>X			if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
>X			    len >= 6 && p[1] == 6) {
>X				magic = (u_long)p[2] << 24 |
>X					(u_long)p[3] << 16 | p[4] << 8 | p[5];
>X				/*
>X				 * If the remote magic is our negated one,
>X				 * this looks like a loopback problem.
>X				 * Suggest a new magic to make sure.
>X				 */
>X				if (magic == ~sp->lcp.magic) {
>X					if (debug)
>X						addlog("magic glitch ");
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X					sp->lcp.magic = random();
>X#else
>X					sp->lcp.magic = time.tv_sec + time.tv_usec;
>X#endif
>X				} else {
>X					sp->lcp.magic = magic;
>X					if (debug)
>X						addlog("%lu ", magic);
>X				}
>X			}
>X			break;
>X		case LCP_OPT_MRU:
>X			/*
>X			 * Peer wants to advise us to negotiate an MRU.
>X			 * Agree on it if it's reasonable, or use
>X			 * default otherwise.
>X			 */
>X			if (len >= 4 && p[1] == 4) {
>X				u_int mru = p[2] * 256 + p[3];
>X				if (debug)
>X					addlog("%d ", mru);
>X				if (mru < PP_MTU || mru > PP_MAX_MRU)
>X					mru = PP_MTU;
>X				sp->lcp.mru = mru;
>X				sp->lcp.opts |= (1 << LCP_OPT_MRU);
>X			}
>X			break;
>X		case LCP_OPT_AUTH_PROTO:
>X			/*
>X			 * Peer doesn't like our authentication method,
>X			 * deny.
>X			 */
>X			if (debug)
>X				addlog("[access denied]\n");
>X			lcp.Close(sp);
>X			break;
>X		}
>X	}
>X	if (debug)
>X		addlog("\n");
>X	free (buf, M_TEMP);
>X	return;
>X}
>X
>Xstatic void
>Xsppp_lcp_tlu(struct sppp *sp)
>X{
>X	STDDCL;
>X	int i;
>X	u_long mask;
>X
>X	/* XXX ? */
>X	if (! (ifp->if_flags & IFF_UP) &&
>X	    (ifp->if_flags & IFF_RUNNING)) {
>X		/* Coming out of loopback mode. */
>X		if_up(ifp);
>X		printf (SPP_FMT "up\n", SPP_ARGS(ifp));
>X	}
>X
>X	for (i = 0; i < IDX_COUNT; i++)
>X		if ((cps[i])->flags & CP_QUAL)
>X			(cps[i])->Open(sp);
>X
>X	if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
>X	    (sp->pp_flags & PP_NEEDAUTH) != 0)
>X		sp->pp_phase = PHASE_AUTHENTICATE;
>X	else
>X		sp->pp_phase = PHASE_NETWORK;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/*
>X	 * Open all authentication protocols.  This is even required
>X	 * if we already proceeded to network phase, since it might be
>X	 * that remote wants us to authenticate, so we might have to
>X	 * send a PAP request.  Undesired authentication protocols
>X	 * don't do anything when they get an Open event.
>X	 */
>X	for (i = 0; i < IDX_COUNT; i++)
>X		if ((cps[i])->flags & CP_AUTH)
>X			(cps[i])->Open(sp);
>X
>X	if (sp->pp_phase == PHASE_NETWORK) {
>X		/* Notify all NCPs. */
>X		for (i = 0; i < IDX_COUNT; i++)
>X			if ((cps[i])->flags & CP_NCP)
>X				(cps[i])->Open(sp);
>X	}
>X
>X	/* Send Up events to all started protos. */
>X	for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
>X		if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0)
>X			(cps[i])->Up(sp);
>X
>X	/* notify low-level driver of state change */
>X	if (sp->pp_chg)
>X		sp->pp_chg(sp, (int)sp->pp_phase);
>X	
>X	if (sp->pp_phase == PHASE_NETWORK)
>X		/* if no NCP is starting, close down */
>X		sppp_lcp_check_and_close(sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_tld(struct sppp *sp)
>X{
>X	STDDCL;
>X	int i;
>X	u_long mask;
>X
>X	sp->pp_phase = PHASE_TERMINATE;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/*
>X	 * Take upper layers down.  We send the Down event first and
>X	 * the Close second to prevent the upper layers from sending
>X	 * ``a flurry of terminate-request packets'', as the RFC
>X	 * describes it.
>X	 */
>X	for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
>X		if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) {
>X			(cps[i])->Down(sp);
>X			(cps[i])->Close(sp);
>X		}
>X}
>X
>Xstatic void
>Xsppp_lcp_tls(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	sp->pp_phase = PHASE_ESTABLISH;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/* Notify lower layer if desired. */
>X	if (sp->pp_tls)
>X		(sp->pp_tls)(sp);
>X	else
>X		(sp->pp_up)(sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_tlf(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	sp->pp_phase = PHASE_DEAD;
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/* Notify lower layer if desired. */
>X	if (sp->pp_tlf)
>X		(sp->pp_tlf)(sp);
>X	else
>X		(sp->pp_down)(sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_scr(struct sppp *sp)
>X{
>X	char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
>X	int i = 0;
>X	u_short authproto;
>X
>X	if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
>X		if (! sp->lcp.magic)
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X			sp->lcp.magic = random();
>X#else
>X			sp->lcp.magic = time.tv_sec + time.tv_usec;
>X#endif
>X		opt[i++] = LCP_OPT_MAGIC;
>X		opt[i++] = 6;
>X		opt[i++] = sp->lcp.magic >> 24;
>X		opt[i++] = sp->lcp.magic >> 16;
>X		opt[i++] = sp->lcp.magic >> 8;
>X		opt[i++] = sp->lcp.magic;
>X	}
>X
>X	if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
>X		opt[i++] = LCP_OPT_MRU;
>X		opt[i++] = 4;
>X		opt[i++] = sp->lcp.mru >> 8;
>X		opt[i++] = sp->lcp.mru;
>X	}
>X
>X	if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
>X		authproto = sp->hisauth.proto;
>X		opt[i++] = LCP_OPT_AUTH_PROTO;
>X		opt[i++] = authproto == PPP_CHAP? 5: 4;
>X		opt[i++] = authproto >> 8;
>X		opt[i++] = authproto;
>X		if (authproto == PPP_CHAP)
>X			opt[i++] = CHAP_MD5;
>X	}
>X
>X	sp->confid[IDX_LCP] = ++sp->pp_seq;
>X	sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
>X}
>X
>X/*
>X * Check the open NCPs, return true if at least one NCP is open.
>X */
>Xstatic int
>Xsppp_ncp_check(struct sppp *sp)
>X{
>X	int i, mask;
>X
>X	for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
>X		if (sp->lcp.protos & mask && (cps[i])->flags & CP_NCP)
>X			return 1;
>X	return 0;
>X}
>X
>X/*
>X * Re-check the open NCPs and see if we should terminate the link.
>X * Called by the NCPs during their tlf action handling.
>X */
>Xstatic void
>Xsppp_lcp_check_and_close(struct sppp *sp)
>X{
>X
>X	if (sp->pp_phase < PHASE_NETWORK)
>X		/* don't bother, we are already going down */
>X		return;
>X
>X	if (sppp_ncp_check(sp))
>X		return;
>X
>X	lcp.Close(sp);
>X}
>X/*
>X *--------------------------------------------------------------------------*
>X *                                                                          *
>X *                        The IPCP implementation.                          *
>X *                                                                          *
>X *--------------------------------------------------------------------------*
>X */
>X
>Xstatic void
>Xsppp_ipcp_init(struct sppp *sp)
>X{
>X	sp->ipcp.opts = 0;
>X	sp->ipcp.flags = 0;
>X	sp->state[IDX_IPCP] = STATE_INITIAL;
>X	sp->fail_counter[IDX_IPCP] = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	callout_handle_init(&sp->ch[IDX_IPCP]);
>X#endif
>X}
>X
>Xstatic void
>Xsppp_ipcp_up(struct sppp *sp)
>X{
>X	sppp_up_event(&ipcp, sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_down(struct sppp *sp)
>X{
>X	sppp_down_event(&ipcp, sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_open(struct sppp *sp)
>X{
>X	STDDCL;
>X	u_long myaddr, hisaddr;
>X
>X	sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN);
>X
>X	sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
>X	/*
>X	 * If we don't have his address, this probably means our
>X	 * interface doesn't want to talk IP at all.  (This could
>X	 * be the case if somebody wants to speak only IPX, for
>X	 * example.)  Don't open IPCP in this case.
>X	 */
>X	if (hisaddr == 0L) {
>X		/* XXX this message should go away */
>X		if (debug)
>X			log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
>X			    SPP_ARGS(ifp));
>X		return;
>X	}
>X
>X	if (myaddr == 0L) {
>X		/*
>X		 * I don't have an assigned address, so i need to
>X		 * negotiate my address.
>X		 */
>X		sp->ipcp.flags |= IPCP_MYADDR_DYN;
>X		sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
>X	} else
>X		sp->ipcp.flags |= IPCP_MYADDR_SEEN;
>X	sppp_open_event(&ipcp, sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_close(struct sppp *sp)
>X{
>X	sppp_close_event(&ipcp, sp);
>X	if (sp->ipcp.flags & IPCP_MYADDR_DYN)
>X		/*
>X		 * My address was dynamic, clear it again.
>X		 */
>X		sppp_set_ip_addr(sp, 0L);
>X}
>X
>Xstatic void
>Xsppp_ipcp_TO(void *cookie)
>X{
>X	sppp_to_event(&ipcp, (struct sppp *)cookie);
>X}
>X
>X/*
>X * Analyze a configure request.  Return true if it was agreeable, and
>X * caused action sca, false if it has been rejected or nak'ed, and
>X * caused action scn.  (The return value is used to make the state
>X * transition decision in the state automaton.)
>X */
>Xstatic int
>Xsppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	u_char *buf, *r, *p;
>X	struct ifnet *ifp = &sp->pp_if;
>X	int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
>X	u_long hisaddr, desiredaddr;
>X	int gotmyaddr = 0;
>X
>X	len -= 4;
>X	origlen = len;
>X	/*
>X	 * Make sure to allocate a buf that can at least hold a
>X	 * conf-nak with an `address' option.  We might need it below.
>X	 */
>X	buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
>X	if (! buf)
>X		return (0);
>X
>X	/* pass 1: see if we can recognize them */
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
>X		    SPP_ARGS(ifp));
>X	p = (void*) (h+1);
>X	for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_ipcp_opt_name(*p));
>X		switch (*p) {
>X#ifdef notyet
>X		case IPCP_OPT_COMPRESSION:
>X			if (len >= 6 && p[1] >= 6) {
>X				/* correctly formed compress option */
>X				continue;
>X			}
>X			if (debug)
>X				addlog("[invalid] ");
>X			break;
>X#endif
>X		case IPCP_OPT_ADDRESS:
>X			if (len >= 6 && p[1] == 6) {
>X				/* correctly formed address option */
>X				continue;
>X			}
>X			if (debug)
>X				addlog("[invalid] ");
>X			break;
>X		default:
>X			/* Others not supported. */
>X			if (debug)
>X				addlog("[rej] ");
>X			break;
>X		}
>X		/* Add the option to rejected list. */
>X		bcopy (p, r, p[1]);
>X		r += p[1];
>X		rlen += p[1];
>X	}
>X	if (rlen) {
>X		if (debug)
>X			addlog(" send conf-rej\n");
>X		sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
>X		return 0;
>X	} else if (debug)
>X		addlog("\n");
>X
>X	/* pass 2: parse option values */
>X	sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
>X		       SPP_ARGS(ifp));
>X	p = (void*) (h+1);
>X	len = origlen;
>X	for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_ipcp_opt_name(*p));
>X		switch (*p) {
>X#ifdef notyet
>X		case IPCP_OPT_COMPRESSION:
>X			continue;
>X#endif
>X		case IPCP_OPT_ADDRESS:
>X			/* This is the address he wants in his end */
>X			desiredaddr = p[2] << 24 | p[3] << 16 |
>X				p[4] << 8 | p[5];
>X			if (desiredaddr == hisaddr ||
>X			    (hisaddr == 1 && desiredaddr != 0)) {
>X				/*
>X				 * Peer's address is same as our value,
>X				 * or we have set it to 0.0.0.1 to 
>X				 * indicate that we do not really care,
>X				 * this is agreeable.  Gonna conf-ack
>X				 * it.
>X				 */
>X				if (debug)
>X					addlog("%s [ack] ",
>X						sppp_dotted_quad(hisaddr));
>X				/* record that we've seen it already */
>X				sp->ipcp.flags |= IPCP_HISADDR_SEEN;
>X				continue;
>X			}
>X			/*
>X			 * The address wasn't agreeable.  This is either
>X			 * he sent us 0.0.0.0, asking to assign him an
>X			 * address, or he send us another address not
>X			 * matching our value.  Either case, we gonna
>X			 * conf-nak it with our value.
>X			 * XXX: we should "rej" if hisaddr == 0
>X			 */
>X			if (debug) {
>X				if (desiredaddr == 0)
>X					addlog("[addr requested] ");
>X				else
>X					addlog("%s [not agreed] ",
>X						sppp_dotted_quad(desiredaddr));
>X
>X				p[2] = hisaddr >> 24;
>X				p[3] = hisaddr >> 16;
>X				p[4] = hisaddr >> 8;
>X				p[5] = hisaddr;
>X			}
>X			break;
>X		}
>X		/* Add the option to nak'ed list. */
>X		bcopy (p, r, p[1]);
>X		r += p[1];
>X		rlen += p[1];
>X	}
>X
>X	/*
>X	 * If we are about to conf-ack the request, but haven't seen
>X	 * his address so far, gonna conf-nak it instead, with the
>X	 * `address' option present and our idea of his address being
>X	 * filled in there, to request negotiation of both addresses.
>X	 *
>X	 * XXX This can result in an endless req - nak loop if peer
>X	 * doesn't want to send us his address.  Q: What should we do
>X	 * about it?  XXX  A: implement the max-failure counter.
>X	 */
>X	if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
>X		buf[0] = IPCP_OPT_ADDRESS;
>X		buf[1] = 6;
>X		buf[2] = hisaddr >> 24;
>X		buf[3] = hisaddr >> 16;
>X		buf[4] = hisaddr >> 8;
>X		buf[5] = hisaddr;
>X		rlen = 6;
>X		if (debug)
>X			addlog("still need hisaddr ");
>X	}
>X
>X	if (rlen) {
>X		if (debug)
>X			addlog(" send conf-nak\n");
>X		sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
>X	} else {
>X		if (debug)
>X			addlog(" send conf-ack\n");
>X		sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
>X			      h->ident, origlen, h+1);
>X	}
>X
>X	free (buf, M_TEMP);
>X	return (rlen == 0);
>X}
>X
>X/*
>X * Analyze the IPCP Configure-Reject option list, and adjust our
>X * negotiation.
>X */
>Xstatic void
>Xsppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	u_char *buf, *p;
>X	struct ifnet *ifp = &sp->pp_if;
>X	int debug = ifp->if_flags & IFF_DEBUG;
>X
>X	len -= 4;
>X	buf = malloc (len, M_TEMP, M_NOWAIT);
>X	if (!buf)
>X		return;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_ipcp_opt_name(*p));
>X		switch (*p) {
>X		case IPCP_OPT_ADDRESS:
>X			/*
>X			 * Peer doesn't grok address option.  This is
>X			 * bad.  XXX  Should we better give up here?
>X			 * XXX We could try old "addresses" option...
>X			 */
>X			sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
>X			break;
>X#ifdef notyet
>X		case IPCP_OPT_COMPRESS:
>X			sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS);
>X			break;
>X#endif
>X		}
>X	}
>X	if (debug)
>X		addlog("\n");
>X	free (buf, M_TEMP);
>X	return;
>X}
>X
>X/*
>X * Analyze the IPCP Configure-NAK option list, and adjust our
>X * negotiation.
>X */
>Xstatic void
>Xsppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	u_char *buf, *p;
>X	struct ifnet *ifp = &sp->pp_if;
>X	int debug = ifp->if_flags & IFF_DEBUG;
>X	u_long wantaddr;
>X
>X	len -= 4;
>X	buf = malloc (len, M_TEMP, M_NOWAIT);
>X	if (!buf)
>X		return;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_ipcp_opt_name(*p));
>X		switch (*p) {
>X		case IPCP_OPT_ADDRESS:
>X			/*
>X			 * Peer doesn't like our local IP address.  See
>X			 * if we can do something for him.  We'll drop
>X			 * him our address then.
>X			 */
>X			if (len >= 6 && p[1] == 6) {
>X				wantaddr = p[2] << 24 | p[3] << 16 |
>X					p[4] << 8 | p[5];
>X				sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
>X				if (debug)
>X					addlog("[wantaddr %s] ",
>X					       sppp_dotted_quad(wantaddr));
>X				/*
>X				 * When doing dynamic address assignment,
>X				 * we accept his offer.  Otherwise, we
>X				 * ignore it and thus continue to negotiate
>X				 * our already existing value.
>X			 	 * XXX: Bogus, if he said no once, he'll
>X				 * just say no again, might as well die.
>X				 */
>X				if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
>X					sppp_set_ip_addr(sp, wantaddr);
>X					if (debug)
>X						addlog("[agree] ");
>X					sp->ipcp.flags |= IPCP_MYADDR_SEEN;
>X				}
>X			}
>X			break;
>X#ifdef notyet
>X		case IPCP_OPT_COMPRESS:
>X			/*
>X			 * Peer wants different compression parameters.
>X			 */
>X			break;
>X#endif
>X		}
>X	}
>X	if (debug)
>X		addlog("\n");
>X	free (buf, M_TEMP);
>X	return;
>X}
>X
>Xstatic void
>Xsppp_ipcp_tlu(struct sppp *sp)
>X{
>X	/* we are up - notify isdn daemon */
>X	if (sp->pp_con)
>X		sp->pp_con(sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_tld(struct sppp *sp)
>X{
>X}
>X
>Xstatic void
>Xsppp_ipcp_tls(struct sppp *sp)
>X{
>X	/* indicate to LCP that it must stay alive */
>X	sp->lcp.protos |= (1 << IDX_IPCP);
>X}
>X
>Xstatic void
>Xsppp_ipcp_tlf(struct sppp *sp)
>X{
>X	/* we no longer need LCP */
>X	sp->lcp.protos &= ~(1 << IDX_IPCP);
>X	sppp_lcp_check_and_close(sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_scr(struct sppp *sp)
>X{
>X	char opt[6 /* compression */ + 6 /* address */];
>X	u_long ouraddr;
>X	int i = 0;
>X
>X#ifdef notyet
>X	if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
>X		opt[i++] = IPCP_OPT_COMPRESSION;
>X		opt[i++] = 6;
>X		opt[i++] = 0;	/* VJ header compression */
>X		opt[i++] = 0x2d; /* VJ header compression */
>X		opt[i++] = max_slot_id;
>X		opt[i++] = comp_slot_id;
>X	}
>X#endif
>X
>X	if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
>X		sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
>X		opt[i++] = IPCP_OPT_ADDRESS;
>X		opt[i++] = 6;
>X		opt[i++] = ouraddr >> 24;
>X		opt[i++] = ouraddr >> 16;
>X		opt[i++] = ouraddr >> 8;
>X		opt[i++] = ouraddr;
>X	}
>X
>X	sp->confid[IDX_IPCP] = ++sp->pp_seq;
>X	sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
>X}
>X
>X
>X/*
>X *--------------------------------------------------------------------------*
>X *                                                                          *
>X *                        The CHAP implementation.                          *
>X *                                                                          *
>X *--------------------------------------------------------------------------*
>X */
>X
>X/*
>X * The authentication protocols don't employ a full-fledged state machine as
>X * the control protocols do, since they do have Open and Close events, but
>X * not Up and Down, nor are they explicitly terminated.  Also, use of the
>X * authentication protocols may be different in both directions (this makes
>X * sense, think of a machine that never accepts incoming calls but only
>X * calls out, it doesn't require the called party to authenticate itself).
>X *
>X * Our state machine for the local authentication protocol (we are requesting
>X * the peer to authenticate) looks like:
>X *
>X *						    RCA-
>X *	      +--------------------------------------------+
>X *	      V					    scn,tld|
>X *	  +--------+			       Close   +---------+ RCA+
>X *	  |	   |<----------------------------------|	 |------+
>X *   +--->| Closed |				TO*    | Opened	 | sca	|
>X *   |	  |	   |-----+		       +-------|	 |<-----+
>X *   |	  +--------+ irc |		       |       +---------+
>X *   |	    ^		 |		       |	   ^
>X *   |	    |		 |		       |	   |
>X *   |	    |		 |		       |	   |
>X *   |	 TO-|		 |		       |	   |
>X *   |	    |tld  TO+	 V		       |	   |
>X *   |	    |	+------->+		       |	   |
>X *   |	    |	|	 |		       |	   |
>X *   |	  +--------+	 V		       |	   |
>X *   |	  |	   |<----+<--------------------+	   |
>X *   |	  | Req-   | scr				   |
>X *   |	  | Sent   |					   |
>X *   |	  |	   |					   |
>X *   |	  +--------+					   |
>X *   | RCA- |	| RCA+					   |
>X *   +------+	+------------------------------------------+
>X *   scn,tld	  sca,irc,ict,tlu
>X *
>X *
>X *   with:
>X *
>X *	Open:	LCP reached authentication phase
>X *	Close:	LCP reached terminate phase
>X *
>X *	RCA+:	received reply (pap-req, chap-response), acceptable
>X *	RCN:	received reply (pap-req, chap-response), not acceptable
>X *	TO+:	timeout with restart counter >= 0
>X *	TO-:	timeout with restart counter < 0
>X *	TO*:	reschedule timeout for CHAP
>X *
>X *	scr:	send request packet (none for PAP, chap-challenge)
>X *	sca:	send ack packet (pap-ack, chap-success)
>X *	scn:	send nak packet (pap-nak, chap-failure)
>X *	ict:	initialize re-challenge timer (CHAP only)
>X *
>X *	tlu:	this-layer-up, LCP reaches network phase
>X *	tld:	this-layer-down, LCP enters terminate phase
>X *
>X * Note that in CHAP mode, after sending a new challenge, while the state
>X * automaton falls back into Req-Sent state, it doesn't signal a tld
>X * event to LCP, so LCP remains in network phase.  Only after not getting
>X * any response (or after getting an unacceptable response), CHAP closes,
>X * causing LCP to enter terminate phase.
>X *
>X * With PAP, there is no initial request that can be sent.  The peer is
>X * expected to send one based on the successful negotiation of PAP as
>X * the authentication protocol during the LCP option negotiation.
>X *
>X * Incoming authentication protocol requests (remote requests
>X * authentication, we are peer) don't employ a state machine at all,
>X * they are simply answered.  Some peers [Ascend P50 firmware rev
>X * 4.50] react allergically when sending IPCP requests while they are
>X * still in authentication phase (thereby violating the standard that
>X * demands that these NCP packets are to be discarded), so we keep
>X * track of the peer demanding us to authenticate, and only proceed to
>X * phase network once we've seen a positive acknowledge for the
>X * authentication.
>X */
>X
>X/*
>X * Handle incoming CHAP packets.
>X */
>Xvoid
>Xsppp_chap_input(struct sppp *sp, struct mbuf *m)
>X{
>X	STDDCL;
>X	struct lcp_header *h;
>X	int len, x;
>X	u_char *value, *name, digest[AUTHKEYLEN], dsize;
>X	int value_len, name_len;
>X	MD5_CTX ctx;
>X
>X	len = m->m_pkthdr.len;
>X	if (len < 4) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "chap invalid packet length: %d bytes\n",
>X			    SPP_ARGS(ifp), len);
>X		return;
>X	}
>X	h = mtod (m, struct lcp_header*);
>X	if (len > ntohs (h->len))
>X		len = ntohs (h->len);
>X
>X	switch (h->type) {
>X	/* challenge, failure and success are his authproto */
>X	case CHAP_CHALLENGE:
>X		value = 1 + (u_char*)(h+1);
>X		value_len = value[-1];
>X		name = value + value_len;
>X		name_len = len - value_len - 5;
>X		if (name_len < 0) {
>X			if (debug) {
>X				log(LOG_DEBUG,
>X				    SPP_FMT "chap corrupted challenge "
>X				    "<%s id=0x%x len=%d",
>X				    SPP_ARGS(ifp),
>X				    sppp_auth_type_name(PPP_CHAP, h->type),
>X				    h->ident, ntohs(h->len));
>X				if (len > 4)
>X					sppp_print_bytes((u_char*) (h+1), len-4);
>X				addlog(">\n");
>X			}
>X			break;
>X		}
>X		
>X		if (debug) {
>X			log(LOG_DEBUG,
>X			    SPP_FMT "chap input <%s id=0x%x len=%d name=",
>X			    SPP_ARGS(ifp),
>X			    sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
>X			    ntohs(h->len));
>X			sppp_print_string((char*) name, name_len);
>X			addlog(" value-size=%d value=", value_len);
>X			sppp_print_bytes(value, value_len);
>X			addlog(">\n");
>X		}
>X
>X		/* Compute reply value. */
>X		MD5Init(&ctx);
>X		MD5Update(&ctx, &h->ident, 1);
>X		MD5Update(&ctx, sp->myauth.secret,
>X			  sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
>X		MD5Update(&ctx, value, value_len);
>X		MD5Final(digest, &ctx);
>X		dsize = sizeof digest;
>X
>X		sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
>X			       sizeof dsize, (const char *)&dsize,
>X			       sizeof digest, digest,
>X			       (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
>X			       sp->myauth.name,
>X			       0);
>X		break;
>X
>X	case CHAP_SUCCESS:
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "chap success",
>X			    SPP_ARGS(ifp));
>X			if (len > 4) {
>X				addlog(": ");
>X				sppp_print_string((char*)(h + 1), len - 4);
>X			}
>X			addlog("\n");
>X		}
>X		x = splimp();
>X		sp->pp_flags &= ~PP_NEEDAUTH;
>X		if (sp->myauth.proto == PPP_CHAP &&
>X		    (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
>X		    (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
>X			/*
>X			 * We are authenticator for CHAP but didn't
>X			 * complete yet.  Leave it to tlu to proceed
>X			 * to network phase.
>X			 */
>X			splx(x);
>X			break;
>X		}
>X		splx(x);
>X		sppp_phase_network(sp);
>X		break;
>X
>X	case CHAP_FAILURE:
>X		if (debug) {
>X			log(LOG_INFO, SPP_FMT "chap failure",
>X			    SPP_ARGS(ifp));
>X			if (len > 4) {
>X				addlog(": ");
>X				sppp_print_string((char*)(h + 1), len - 4);
>X			}
>X			addlog("\n");
>X		} else
>X			log(LOG_INFO, SPP_FMT "chap failure\n",
>X			    SPP_ARGS(ifp));
>X		/* await LCP shutdown by authenticator */
>X		break;
>X
>X	/* response is my authproto */
>X	case CHAP_RESPONSE:
>X		value = 1 + (u_char*)(h+1);
>X		value_len = value[-1];
>X		name = value + value_len;
>X		name_len = len - value_len - 5;
>X		if (name_len < 0) {
>X			if (debug) {
>X				log(LOG_DEBUG,
>X				    SPP_FMT "chap corrupted response "
>X				    "<%s id=0x%x len=%d",
>X				    SPP_ARGS(ifp),
>X				    sppp_auth_type_name(PPP_CHAP, h->type),
>X				    h->ident, ntohs(h->len));
>X				if (len > 4)
>X					sppp_print_bytes((u_char*)(h+1), len-4);
>X				addlog(">\n");
>X			}
>X			break;
>X		}
>X		if (h->ident != sp->confid[IDX_CHAP]) {
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "chap dropping response for old ID "
>X				    "(got %d, expected %d)\n",
>X				    SPP_ARGS(ifp),
>X				    h->ident, sp->confid[IDX_CHAP]);
>X			break;
>X		}
>X		if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
>X		    || bcmp(name, sp->hisauth.name, name_len) != 0) {
>X			log(LOG_INFO, SPP_FMT "chap response, his name ",
>X			    SPP_ARGS(ifp));
>X			sppp_print_string(name, name_len);
>X			addlog(" != expected ");
>X			sppp_print_string(sp->hisauth.name,
>X					  sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
>X			addlog("\n");
>X		}    
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "chap input(%s) "
>X			    "<%s id=0x%x len=%d name=",
>X			    SPP_ARGS(ifp),
>X			    sppp_state_name(sp->state[IDX_CHAP]),
>X			    sppp_auth_type_name(PPP_CHAP, h->type),
>X			    h->ident, ntohs (h->len));
>X			sppp_print_string((char*)name, name_len);
>X			addlog(" value-size=%d value=", value_len);
>X			sppp_print_bytes(value, value_len);
>X			addlog(">\n");
>X		}
>X		if (value_len != AUTHKEYLEN) {
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "chap bad hash value length: "
>X				    "%d bytes, should be %d\n",
>X				    SPP_ARGS(ifp), value_len,
>X				    AUTHKEYLEN);
>X			break;
>X		}
>X
>X		MD5Init(&ctx);
>X		MD5Update(&ctx, &h->ident, 1);
>X		MD5Update(&ctx, sp->hisauth.secret,
>X			  sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
>X		MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
>X		MD5Final(digest, &ctx);
>X
>X#define FAILMSG "Failed..."
>X#define SUCCMSG "Welcome!"
>X
>X		if (value_len != sizeof digest ||
>X		    bcmp(digest, value, value_len) != 0) {
>X			/* action scn, tld */
>X			sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
>X				       sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
>X				       0);
>X			chap.tld(sp);
>X			break;
>X		}
>X		/* action sca, perhaps tlu */
>X		if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
>X		    sp->state[IDX_CHAP] == STATE_OPENED)
>X			sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
>X				       sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
>X				       0);
>X		if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
>X			sppp_cp_change_state(&chap, sp, STATE_OPENED);
>X			chap.tlu(sp);
>X		}
>X		break;
>X
>X	default:
>X		/* Unknown CHAP packet type -- ignore. */
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
>X			    "<0x%x id=0x%xh len=%d",
>X			    SPP_ARGS(ifp),
>X			    sppp_state_name(sp->state[IDX_CHAP]),
>X			    h->type, h->ident, ntohs(h->len));
>X			if (len > 4)
>X				sppp_print_bytes((u_char*)(h+1), len-4);
>X			addlog(">\n");
>X		}
>X		break;
>X
>X	}
>X}
>X
>Xstatic void
>Xsppp_chap_init(struct sppp *sp)
>X{
>X	/* Chap doesn't have STATE_INITIAL at all. */
>X	sp->state[IDX_CHAP] = STATE_CLOSED;
>X	sp->fail_counter[IDX_CHAP] = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	callout_handle_init(&sp->ch[IDX_CHAP]);
>X#endif
>X}
>X
>Xstatic void
>Xsppp_chap_open(struct sppp *sp)
>X{
>X	if (sp->myauth.proto == PPP_CHAP &&
>X	    (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
>X		/* we are authenticator for CHAP, start it */
>X		chap.scr(sp);
>X		sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
>X		sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
>X	}
>X	/* nothing to be done if we are peer, await a challenge */
>X}
>X
>Xstatic void
>Xsppp_chap_close(struct sppp *sp)
>X{
>X	if (sp->state[IDX_CHAP] != STATE_CLOSED)
>X		sppp_cp_change_state(&chap, sp, STATE_CLOSED);
>X}
>X
>Xstatic void
>Xsppp_chap_TO(void *cookie)
>X{
>X	struct sppp *sp = (struct sppp *)cookie;
>X	STDDCL;
>X	int s;
>X
>X	s = splimp();
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
>X		    SPP_ARGS(ifp),
>X		    sppp_state_name(sp->state[IDX_CHAP]),
>X		    sp->rst_counter[IDX_CHAP]);
>X
>X	if (--sp->rst_counter[IDX_CHAP] < 0)
>X		/* TO- event */
>X		switch (sp->state[IDX_CHAP]) {
>X		case STATE_REQ_SENT:
>X			chap.tld(sp);
>X			sppp_cp_change_state(&chap, sp, STATE_CLOSED);
>X			break;
>X		}
>X	else
>X		/* TO+ (or TO*) event */
>X		switch (sp->state[IDX_CHAP]) {
>X		case STATE_OPENED:
>X			/* TO* event */
>X			sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
>X			/* fall through */
>X		case STATE_REQ_SENT:
>X			chap.scr(sp);
>X			/* sppp_cp_change_state() will restart the timer */
>X			sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
>X			break;
>X		}
>X
>X	splx(s);
>X}
>X
>Xstatic void
>Xsppp_chap_tlu(struct sppp *sp)
>X{
>X	STDDCL;
>X	int i, x;
>X
>X	i = 0;
>X	sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
>X
>X	/*
>X	 * Some broken CHAP implementations (Conware CoNet, firmware
>X	 * 4.0.?) don't want to re-authenticate their CHAP once the
>X	 * initial challenge-response exchange has taken place.
>X	 * Provide for an option to avoid rechallenges.
>X	 */
>X	if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
>X		/*
>X		 * Compute the re-challenge timeout.  This will yield
>X		 * a number between 300 and 810 seconds.
>X		 */
>X		i = 300 + ((unsigned)(random() & 0xff00) >> 7);
>X		TIMEOUT(chap.TO, (void *)sp, i * hz, sp->ch[IDX_CHAP]);
>X	}
>X
>X	if (debug) {
>X		log(LOG_DEBUG,
>X		    SPP_FMT "chap %s, ",
>X		    SPP_ARGS(ifp),
>X		    sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
>X		if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
>X			addlog("next re-challenge in %d seconds\n", i);
>X		else
>X			addlog("re-challenging supressed\n");
>X	}
>X
>X	x = splimp();
>X	/* indicate to LCP that we need to be closed down */
>X	sp->lcp.protos |= (1 << IDX_CHAP);
>X
>X	if (sp->pp_flags & PP_NEEDAUTH) {
>X		/*
>X		 * Remote is authenticator, but his auth proto didn't
>X		 * complete yet.  Defer the transition to network
>X		 * phase.
>X		 */
>X		splx(x);
>X		return;
>X	}
>X	splx(x);
>X
>X	/*
>X	 * If we are already in phase network, we are done here.  This
>X	 * is the case if this is a dummy tlu event after a re-challenge.
>X	 */
>X	if (sp->pp_phase != PHASE_NETWORK)
>X		sppp_phase_network(sp);
>X}
>X
>Xstatic void
>Xsppp_chap_tld(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
>X	UNTIMEOUT(chap.TO, (void *)sp, sp->ch[IDX_CHAP]);
>X	sp->lcp.protos &= ~(1 << IDX_CHAP);
>X
>X	lcp.Close(sp);
>X}
>X
>Xstatic void
>Xsppp_chap_scr(struct sppp *sp)
>X{
>X	u_long *ch, seed;
>X	u_char clen;
>X
>X	/* Compute random challenge. */
>X	ch = (u_long *)sp->myauth.challenge;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	read_random(&seed, sizeof seed);
>X#else
>X	{
>X	struct timeval tv;
>X	microtime(&tv);
>X	seed = tv.tv_sec ^ tv.tv_usec;
>X	}
>X#endif
>X	ch[0] = seed ^ random();
>X	ch[1] = seed ^ random();
>X	ch[2] = seed ^ random();
>X	ch[3] = seed ^ random();
>X	clen = AUTHKEYLEN;
>X
>X	sp->confid[IDX_CHAP] = ++sp->pp_seq;
>X
>X	sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
>X		       sizeof clen, (const char *)&clen,
>X		       (size_t)AUTHKEYLEN, sp->myauth.challenge,
>X		       (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
>X		       sp->myauth.name,
>X		       0);
>X}
>X/*
>X *--------------------------------------------------------------------------*
>X *                                                                          *
>X *                        The PAP implementation.                           *
>X *                                                                          *
>X *--------------------------------------------------------------------------*
>X */
>X/*
>X * For PAP, we need to keep a little state also if we are the peer, not the
>X * authenticator.  This is since we don't get a request to authenticate, but
>X * have to repeatedly authenticate ourself until we got a response (or the
>X * retry counter is expired).
>X */
>X
>X/*
>X * Handle incoming PAP packets.  */
>Xstatic void
>Xsppp_pap_input(struct sppp *sp, struct mbuf *m)
>X{
>X	STDDCL;
>X	struct lcp_header *h;
>X	int len, x;
>X	u_char *name, *passwd, mlen;
>X	int name_len, passwd_len;
>X
>X	len = m->m_pkthdr.len;
>X	if (len < 5) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "pap invalid packet length: %d bytes\n",
>X			    SPP_ARGS(ifp), len);
>X		return;
>X	}
>X	h = mtod (m, struct lcp_header*);
>X	if (len > ntohs (h->len))
>X		len = ntohs (h->len);
>X	switch (h->type) {
>X	/* PAP request is my authproto */
>X	case PAP_REQ:
>X		name = 1 + (u_char*)(h+1);
>X		name_len = name[-1];
>X		passwd = name + name_len + 1;
>X		if (name_len > len - 6 ||
>X		    (passwd_len = passwd[-1]) > len - 6 - name_len) {
>X			if (debug) {
>X				log(LOG_DEBUG, SPP_FMT "pap corrupted input "
>X				    "<%s id=0x%x len=%d",
>X				    SPP_ARGS(ifp),
>X				    sppp_auth_type_name(PPP_PAP, h->type),
>X				    h->ident, ntohs(h->len));
>X				if (len > 4)
>X					sppp_print_bytes((u_char*)(h+1), len-4);
>X				addlog(">\n");
>X			}
>X			break;
>X		}
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "pap input(%s) "
>X			    "<%s id=0x%x len=%d name=",
>X			    SPP_ARGS(ifp),
>X			    sppp_state_name(sp->state[IDX_PAP]),
>X			    sppp_auth_type_name(PPP_PAP, h->type),
>X			    h->ident, ntohs(h->len));
>X			sppp_print_string((char*)name, name_len);
>X			addlog(" passwd=");
>X			sppp_print_string((char*)passwd, passwd_len);
>X			addlog(">\n");
>X		}
>X		if (name_len > AUTHNAMELEN ||
>X		    passwd_len > AUTHKEYLEN ||
>X		    bcmp(name, sp->hisauth.name, name_len) != 0 ||
>X		    bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
>X			/* action scn, tld */
>X			mlen = sizeof(FAILMSG) - 1;
>X			sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
>X				       sizeof mlen, (const char *)&mlen,
>X				       sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
>X				       0);
>X			pap.tld(sp);
>X			break;
>X		}
>X		/* action sca, perhaps tlu */
>X		if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
>X		    sp->state[IDX_PAP] == STATE_OPENED) {
>X			mlen = sizeof(SUCCMSG) - 1;
>X			sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
>X				       sizeof mlen, (const char *)&mlen,
>X				       sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
>X				       0);
>X		}
>X		if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
>X			sppp_cp_change_state(&pap, sp, STATE_OPENED);
>X			pap.tlu(sp);
>X		}
>X		break;
>X
>X	/* ack and nak are his authproto */
>X	case PAP_ACK:
>X		UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "pap success",
>X			    SPP_ARGS(ifp));
>X			name_len = *((char *)h);
>X			if (len > 5 && name_len) {
>X				addlog(": ");
>X				sppp_print_string((char*)(h+1), name_len);
>X			}
>X			addlog("\n");
>X		}
>X		x = splimp();
>X		sp->pp_flags &= ~PP_NEEDAUTH;
>X		if (sp->myauth.proto == PPP_PAP &&
>X		    (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
>X		    (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
>X			/*
>X			 * We are authenticator for PAP but didn't
>X			 * complete yet.  Leave it to tlu to proceed
>X			 * to network phase.
>X			 */
>X			splx(x);
>X			break;
>X		}
>X		splx(x);
>X		sppp_phase_network(sp);
>X		break;
>X
>X	case PAP_NAK:
>X		UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
>X		if (debug) {
>X			log(LOG_INFO, SPP_FMT "pap failure",
>X			    SPP_ARGS(ifp));
>X			name_len = *((char *)h);
>X			if (len > 5 && name_len) {
>X				addlog(": ");
>X				sppp_print_string((char*)(h+1), name_len);
>X			}
>X			addlog("\n");
>X		} else
>X			log(LOG_INFO, SPP_FMT "pap failure\n",
>X			    SPP_ARGS(ifp));
>X		/* await LCP shutdown by authenticator */
>X		break;
>X
>X	default:
>X		/* Unknown PAP packet type -- ignore. */
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "pap corrupted input "
>X			    "<0x%x id=0x%x len=%d",
>X			    SPP_ARGS(ifp),
>X			    h->type, h->ident, ntohs(h->len));
>X			if (len > 4)
>X				sppp_print_bytes((u_char*)(h+1), len-4);
>X			addlog(">\n");
>X		}
>X		break;
>X
>X	}
>X}
>X
>Xstatic void
>Xsppp_pap_init(struct sppp *sp)
>X{
>X	/* PAP doesn't have STATE_INITIAL at all. */
>X	sp->state[IDX_PAP] = STATE_CLOSED;
>X	sp->fail_counter[IDX_PAP] = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	callout_handle_init(&sp->ch[IDX_PAP]);
>X	callout_handle_init(&sp->pap_my_to_ch);
>X#endif
>X}
>X
>Xstatic void
>Xsppp_pap_open(struct sppp *sp)
>X{
>X	if (sp->hisauth.proto == PPP_PAP &&
>X	    (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
>X		/* we are authenticator for PAP, start our timer */
>X		sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
>X		sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
>X	}
>X	if (sp->myauth.proto == PPP_PAP) {
>X		/* we are peer, send a request, and start a timer */
>X		pap.scr(sp);
>X		TIMEOUT(sppp_pap_my_TO, (void *)sp, sp->lcp.timeout,
>X		    sp->pap_my_to_ch);
>X	}
>X}
>X
>Xstatic void
>Xsppp_pap_close(struct sppp *sp)
>X{
>X	if (sp->state[IDX_PAP] != STATE_CLOSED)
>X		sppp_cp_change_state(&pap, sp, STATE_CLOSED);
>X}
>X
>X/*
>X * That's the timeout routine if we are authenticator.  Since the
>X * authenticator is basically passive in PAP, we can't do much here.
>X */
>Xstatic void
>Xsppp_pap_TO(void *cookie)
>X{
>X	struct sppp *sp = (struct sppp *)cookie;
>X	STDDCL;
>X	int s;
>X
>X	s = splimp();
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
>X		    SPP_ARGS(ifp),
>X		    sppp_state_name(sp->state[IDX_PAP]),
>X		    sp->rst_counter[IDX_PAP]);
>X
>X	if (--sp->rst_counter[IDX_PAP] < 0)
>X		/* TO- event */
>X		switch (sp->state[IDX_PAP]) {
>X		case STATE_REQ_SENT:
>X			pap.tld(sp);
>X			sppp_cp_change_state(&pap, sp, STATE_CLOSED);
>X			break;
>X		}
>X	else
>X		/* TO+ event, not very much we could do */
>X		switch (sp->state[IDX_PAP]) {
>X		case STATE_REQ_SENT:
>X			/* sppp_cp_change_state() will restart the timer */
>X			sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
>X			break;
>X		}
>X
>X	splx(s);
>X}
>X
>X/*
>X * That's the timeout handler if we are peer.  Since the peer is active,
>X * we need to retransmit our PAP request since it is apparently lost.
>X * XXX We should impose a max counter.
>X */
>Xstatic void
>Xsppp_pap_my_TO(void *cookie)
>X{
>X	struct sppp *sp = (struct sppp *)cookie;
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
>X		    SPP_ARGS(ifp));
>X
>X	pap.scr(sp);
>X}
>X
>Xstatic void
>Xsppp_pap_tlu(struct sppp *sp)
>X{
>X	STDDCL;
>X	int x;
>X
>X	sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s tlu\n",
>X		    SPP_ARGS(ifp), pap.name);
>X
>X	x = splimp();
>X	/* indicate to LCP that we need to be closed down */
>X	sp->lcp.protos |= (1 << IDX_PAP);
>X
>X	if (sp->pp_flags & PP_NEEDAUTH) {
>X		/*
>X		 * Remote is authenticator, but his auth proto didn't
>X		 * complete yet.  Defer the transition to network
>X		 * phase.
>X		 */
>X		splx(x);
>X		return;
>X	}
>X	splx(x);
>X	sppp_phase_network(sp);
>X}
>X
>Xstatic void
>Xsppp_pap_tld(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
>X	UNTIMEOUT(pap.TO, (void *)sp, sp->ch[IDX_PAP]);
>X	UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
>X	sp->lcp.protos &= ~(1 << IDX_PAP);
>X
>X	lcp.Close(sp);
>X}
>X
>Xstatic void
>Xsppp_pap_scr(struct sppp *sp)
>X{
>X	u_char idlen, pwdlen;
>X
>X	sp->confid[IDX_PAP] = ++sp->pp_seq;
>X	pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
>X	idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
>X
>X	sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
>X		       sizeof idlen, (const char *)&idlen,
>X		       (size_t)idlen, sp->myauth.name,
>X		       sizeof pwdlen, (const char *)&pwdlen,
>X		       (size_t)pwdlen, sp->myauth.secret,
>X		       0);
>X}
>X/*
>X * Random miscellaneous functions.
>X */
>X
>X/*
>X * Send a PAP or CHAP proto packet.
>X *
>X * Varadic function, each of the elements for the ellipsis is of type
>X * ``size_t mlen, const u_char *msg''.  Processing will stop iff
>X * mlen == 0.
>X * NOTE: never declare variadic functions with types subject to type
>X * promotion (i.e. u_char). This is asking for big trouble depending
>X * on the architecture you are on...
>X */
>X
>Xstatic void
>Xsppp_auth_send(const struct cp *cp, struct sppp *sp,
>X               unsigned int type, unsigned int id,
>X	       ...)
>X{
>X	STDDCL;
>X	struct ppp_header *h;
>X	struct lcp_header *lh;
>X	struct mbuf *m;
>X	u_char *p;
>X	int len;
>X	unsigned int mlen;
>X	const char *msg;
>X	va_list ap;
>X
>X	MGETHDR (m, M_DONTWAIT, MT_DATA);
>X	if (! m)
>X		return;
>X	m->m_pkthdr.rcvif = 0;
>X
>X	h = mtod (m, struct ppp_header*);
>X	h->address = PPP_ALLSTATIONS;		/* broadcast address */
>X	h->control = PPP_UI;			/* Unnumbered Info */
>X	h->protocol = htons(cp->proto);
>X
>X	lh = (struct lcp_header*)(h + 1);
>X	lh->type = type;
>X	lh->ident = id;
>X	p = (u_char*) (lh+1);
>X
>X	va_start(ap, id);
>X	len = 0;
>X
>X	while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) {
>X		msg = va_arg(ap, const char *);
>X		len += mlen;
>X		if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
>X			va_end(ap);
>X			m_freem(m);
>X			return;
>X		}
>X
>X		bcopy(msg, p, mlen);
>X		p += mlen;
>X	}
>X	va_end(ap);
>X
>X	m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
>X	lh->len = htons (LCP_HEADER_LEN + len);
>X
>X	if (debug) {
>X		log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_auth_type_name(cp->proto, lh->type),
>X		    lh->ident, ntohs(lh->len));
>X		if (len)
>X			sppp_print_bytes((u_char*) (lh+1), len);
>X		addlog(">\n");
>X	}
>X	if (IF_QFULL (&sp->pp_cpq)) {
>X		IF_DROP (&sp->pp_fastq);
>X		IF_DROP (&ifp->if_snd);
>X		m_freem (m);
>X		++ifp->if_oerrors;
>X	} else
>X		IF_ENQUEUE (&sp->pp_cpq, m);
>X	if (! (ifp->if_flags & IFF_OACTIVE))
>X		(*ifp->if_start) (ifp);
>X	ifp->if_obytes += m->m_pkthdr.len + 3;
>X}
>X
>X/*
>X * Flush interface queue.
>X */
>Xstatic void
>Xsppp_qflush(struct ifqueue *ifq)
>X{
>X	struct mbuf *m, *n;
>X
>X	n = ifq->ifq_head;
>X	while ((m = n)) {
>X		n = m->m_act;
>X		m_freem (m);
>X	}
>X	ifq->ifq_head = 0;
>X	ifq->ifq_tail = 0;
>X	ifq->ifq_len = 0;
>X}
>X
>X/*
>X * Send keepalive packets, every 10 seconds.
>X */
>Xstatic void
>Xsppp_keepalive(void *dummy)
>X{
>X	struct sppp *sp;
>X	int s;
>X
>X	s = splimp();
>X	for (sp=spppq; sp; sp=sp->pp_next) {
>X		struct ifnet *ifp = &sp->pp_if;
>X
>X		/* Keepalive mode disabled or channel down? */
>X		if (! (sp->pp_flags & PP_KEEPALIVE) ||
>X		    ! (ifp->if_flags & IFF_RUNNING))
>X			continue;
>X
>X		/* No keepalive in PPP mode if LCP not opened yet. */
>X		if (! (sp->pp_flags & PP_CISCO) &&
>X		    sp->pp_phase < PHASE_AUTHENTICATE)
>X			continue;
>X
>X		if (sp->pp_alivecnt == MAXALIVECNT) {
>X			/* No keepalive packets got.  Stop the interface. */
>X			printf (SPP_FMT "down\n", SPP_ARGS(ifp));
>X			if_down (ifp);
>X			sppp_qflush (&sp->pp_cpq);
>X			if (! (sp->pp_flags & PP_CISCO)) {
>X				/* XXX */
>X				/* Shut down the PPP link. */
>X				lcp.Down(sp);
>X				/* Initiate negotiation. XXX */
>X				lcp.Up(sp);
>X			}
>X		}
>X		if (sp->pp_alivecnt <= MAXALIVECNT)
>X			++sp->pp_alivecnt;
>X		if (sp->pp_flags & PP_CISCO)
>X			sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, ++sp->pp_seq,
>X				sp->pp_rseq);
>X		else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
>X			long nmagic = htonl (sp->lcp.magic);
>X			sp->lcp.echoid = ++sp->pp_seq;
>X			sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
>X				sp->lcp.echoid, 4, &nmagic);
>X		}
>X	}
>X	splx(s);
>X	TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch);
>X}
>X
>X/*
>X * Get both IP addresses.
>X */
>Xstatic void
>Xsppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
>X{
>X	struct ifnet *ifp = &sp->pp_if;
>X	struct ifaddr *ifa;
>X	struct sockaddr_in *si, *sm;
>X	u_long ssrc, ddst;
>X
>X	sm = NULL;
>X	ssrc = ddst = 0L;
>X	/*
>X	 * Pick the first AF_INET address from the list,
>X	 * aliases don't make any sense on a p2p link anyway.
>X	 */
>X	si = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
>X#elif defined(__NetBSD__) || defined (__OpenBSD__)
>X	for (ifa = ifp->if_addrlist.tqh_first;
>X	     ifa;
>X	     ifa = ifa->ifa_list.tqe_next)
>X#else
>X	for (ifa = ifp->if_addrlist;
>X	     ifa;
>X	     ifa = ifa->ifa_next)
>X#endif
>X		if (ifa->ifa_addr->sa_family == AF_INET) {
>X			si = (struct sockaddr_in *)ifa->ifa_addr;
>X			sm = (struct sockaddr_in *)ifa->ifa_netmask;
>X			if (si)
>X				break;
>X		}
>X	if (ifa) {
>X		if (si && si->sin_addr.s_addr) {
>X			ssrc = si->sin_addr.s_addr;
>X			if (srcmask)
>X				*srcmask = ntohl(sm->sin_addr.s_addr);
>X		}
>X
>X		si = (struct sockaddr_in *)ifa->ifa_dstaddr;
>X		if (si && si->sin_addr.s_addr)
>X			ddst = si->sin_addr.s_addr;
>X	}
>X
>X	if (dst) *dst = ntohl(ddst);
>X	if (src) *src = ntohl(ssrc);
>X}
>X
>X/*
>X * Set my IP address.  Must be called at splimp.
>X */
>Xstatic void
>Xsppp_set_ip_addr(struct sppp *sp, u_long src)
>X{
>X	STDDCL;
>X	struct ifaddr *ifa;
>X	struct sockaddr_in *si;
>X
>X	/*
>X	 * Pick the first AF_INET address from the list,
>X	 * aliases don't make any sense on a p2p link anyway.
>X	 */
>X	si = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
>X#elif defined(__NetBSD__) || defined (__OpenBSD__)
>X	for (ifa = ifp->if_addrlist.tqh_first;
>X	     ifa;
>X	     ifa = ifa->ifa_list.tqe_next)
>X#else
>X	for (ifa = ifp->if_addrlist;
>X	     ifa;
>X	     ifa = ifa->ifa_next)
>X#endif
>X	{
>X		if (ifa->ifa_addr->sa_family == AF_INET)
>X		{
>X			si = (struct sockaddr_in *)ifa->ifa_addr;
>X			if (si)
>X				break;
>X		}
>X	}
>X
>X	if (ifa && si)
>X	{
>X		int error;
>X#if __NetBSD_Version__ >= 103080000
>X		struct sockaddr_in new_sin = *si;
>X
>X		new_sin.sin_addr.s_addr = htonl(src);
>X		error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1);
>X		if(debug && error)
>X		{
>X			log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit "
>X			" failed, error=%d\n", SPP_ARGS(ifp), error);
>X		}
>X#else
>X		/* delete old route */
>X		error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
>X		if(debug && error)
>X		{
>X			log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
>X		    		SPP_ARGS(ifp), error);
>X		}
>X
>X		/* set new address */
>X		si->sin_addr.s_addr = htonl(src);
>X
>X		/* add new route */
>X		error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);		
>X		if (debug && error)
>X		{
>X			log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
>X		    		SPP_ARGS(ifp), error);
>X		}
>X#endif
>X	}
>X}			
>X
>Xstatic int
>Xsppp_params(struct sppp *sp, u_long cmd, void *data)
>X{
>X	u_long subcmd;
>X	struct ifreq *ifr = (struct ifreq *)data;
>X	struct spppreq spr;
>X
>X	/*
>X	 * ifr->ifr_data is supposed to point to a struct spppreq.
>X	 * Check the cmd word first before attempting to fetch all the
>X	 * data.
>X	 */
>X	if ((subcmd = fuword(ifr->ifr_data)) == -1)
>X		return EFAULT;
>X
>X	if (copyin((caddr_t)ifr->ifr_data, &spr, sizeof spr) != 0)
>X		return EFAULT;
>X
>X	switch (subcmd) {
>X	case SPPPIOGDEFS:
>X		if (cmd != SIOCGIFGENERIC)
>X			return EINVAL;
>X		/*
>X		 * We copy over the entire current state, but clean
>X		 * out some of the stuff we don't wanna pass up.
>X		 * Remember, SIOCGIFGENERIC is unprotected, and can be
>X		 * called by any user.  No need to ever get PAP or
>X		 * CHAP secrets back to userland anyway.
>X		 */
>X		bcopy(sp, &spr.defs, sizeof(struct sppp));
>X		bzero(spr.defs.myauth.secret, AUTHKEYLEN);
>X		bzero(spr.defs.myauth.challenge, AUTHKEYLEN);
>X		bzero(spr.defs.hisauth.secret, AUTHKEYLEN);
>X		bzero(spr.defs.hisauth.challenge, AUTHKEYLEN);
>X		return copyout(&spr, (caddr_t)ifr->ifr_data, sizeof spr);
>X
>X	case SPPPIOSDEFS:
>X		if (cmd != SIOCSIFGENERIC)
>X			return EINVAL;
>X		/*
>X		 * We have a very specific idea of which fields we allow
>X		 * being passed back from userland, so to not clobber our
>X		 * current state.  For one, we only allow setting
>X		 * anything if LCP is in dead phase.  Once the LCP
>X		 * negotiations started, the authentication settings must
>X		 * not be changed again.  (The administrator can force an
>X		 * ifconfig down in order to get LCP back into dead
>X		 * phase.)
>X		 *
>X		 * Also, we only allow for authentication parameters to be
>X		 * specified.
>X		 *
>X		 * XXX Should allow to set or clear pp_flags.
>X		 *
>X		 * Finally, if the respective authentication protocol to
>X		 * be used is set differently than 0, but the secret is
>X		 * passed as all zeros, we don't trash the existing secret.
>X		 * This allows an administrator to change the system name
>X		 * only without clobbering the secret (which he didn't get
>X		 * back in a previous SPPPIOGDEFS call).  However, the
>X		 * secrets are cleared if the authentication protocol is
>X		 * reset to 0.
>X		 */
>X		if (sp->pp_phase != PHASE_DEAD)
>X			return EBUSY;
>X
>X		if ((spr.defs.myauth.proto != 0 && spr.defs.myauth.proto != PPP_PAP &&
>X		     spr.defs.myauth.proto != PPP_CHAP) ||
>X		    (spr.defs.hisauth.proto != 0 && spr.defs.hisauth.proto != PPP_PAP &&
>X		     spr.defs.hisauth.proto != PPP_CHAP))
>X			return EINVAL;
>X
>X		if (spr.defs.myauth.proto == 0)
>X			/* resetting myauth */
>X			bzero(&sp->myauth, sizeof sp->myauth);
>X		else {
>X			/* setting/changing myauth */
>X			sp->myauth.proto = spr.defs.myauth.proto;
>X			bcopy(spr.defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
>X			if (spr.defs.myauth.secret[0] != '\0')
>X				bcopy(spr.defs.myauth.secret, sp->myauth.secret,
>X				      AUTHKEYLEN);
>X		}
>X		if (spr.defs.hisauth.proto == 0)
>X			/* resetting hisauth */
>X			bzero(&sp->hisauth, sizeof sp->hisauth);
>X		else {
>X			/* setting/changing hisauth */
>X			sp->hisauth.proto = spr.defs.hisauth.proto;
>X			sp->hisauth.flags = spr.defs.hisauth.flags;
>X			bcopy(spr.defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
>X			if (spr.defs.hisauth.secret[0] != '\0')
>X				bcopy(spr.defs.hisauth.secret, sp->hisauth.secret,
>X				      AUTHKEYLEN);
>X		}
>X		break;
>X
>X	default:
>X		return EINVAL;
>X	}
>X
>X	return 0;
>X}
>X
>Xstatic void
>Xsppp_phase_network(struct sppp *sp)
>X{
>X	STDDCL;
>X	int i;
>X	u_long mask;
>X
>X	sp->pp_phase = PHASE_NETWORK;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/* Notify NCPs now. */
>X	for (i = 0; i < IDX_COUNT; i++)
>X		if ((cps[i])->flags & CP_NCP)
>X			(cps[i])->Open(sp);
>X
>X	/* Send Up events to all NCPs. */
>X	for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
>X		if (sp->lcp.protos & mask && ((cps[i])->flags & CP_NCP))
>X			(cps[i])->Up(sp);
>X
>X	/* if no NCP is starting, all this was in vain, close down */
>X	sppp_lcp_check_and_close(sp);
>X}
>X	
>X
>Xstatic const char *
>Xsppp_cp_type_name(u_char type)
>X{
>X	static char buf[12];
>X	switch (type) {
>X	case CONF_REQ:   return "conf-req";
>X	case CONF_ACK:   return "conf-ack";
>X	case CONF_NAK:   return "conf-nak";
>X	case CONF_REJ:   return "conf-rej";
>X	case TERM_REQ:   return "term-req";
>X	case TERM_ACK:   return "term-ack";
>X	case CODE_REJ:   return "code-rej";
>X	case PROTO_REJ:  return "proto-rej";
>X	case ECHO_REQ:   return "echo-req";
>X	case ECHO_REPLY: return "echo-reply";
>X	case DISC_REQ:   return "discard-req";
>X	}
>X	snprintf (buf, sizeof(buf), "0x%x", type);
>X	return buf;
>X}
>X
>Xstatic const char *
>Xsppp_auth_type_name(u_short proto, u_char type)
>X{
>X	static char buf[12];
>X	switch (proto) {
>X	case PPP_CHAP:
>X		switch (type) {
>X		case CHAP_CHALLENGE:	return "challenge";
>X		case CHAP_RESPONSE:	return "response";
>X		case CHAP_SUCCESS:	return "success";
>X		case CHAP_FAILURE:	return "failure";
>X		}
>X	case PPP_PAP:
>X		switch (type) {
>X		case PAP_REQ:		return "req";
>X		case PAP_ACK:		return "ack";
>X		case PAP_NAK:		return "nak";
>X		}
>X	}
>X	snprintf (buf, sizeof(buf), "0x%x", type);
>X	return buf;
>X}
>X
>Xstatic const char *
>Xsppp_lcp_opt_name(u_char opt)
>X{
>X	static char buf[12];
>X	switch (opt) {
>X	case LCP_OPT_MRU:		return "mru";
>X	case LCP_OPT_ASYNC_MAP:		return "async-map";
>X	case LCP_OPT_AUTH_PROTO:	return "auth-proto";
>X	case LCP_OPT_QUAL_PROTO:	return "qual-proto";
>X	case LCP_OPT_MAGIC:		return "magic";
>X	case LCP_OPT_PROTO_COMP:	return "proto-comp";
>X	case LCP_OPT_ADDR_COMP:		return "addr-comp";
>X	}
>X	snprintf (buf, sizeof(buf), "0x%x", opt);
>X	return buf;
>X}
>X
>Xstatic const char *
>Xsppp_ipcp_opt_name(u_char opt)
>X{
>X	static char buf[12];
>X	switch (opt) {
>X	case IPCP_OPT_ADDRESSES:	return "addresses";
>X	case IPCP_OPT_COMPRESSION:	return "compression";
>X	case IPCP_OPT_ADDRESS:		return "address";
>X	}
>X	snprintf (buf, sizeof(buf), "0x%x", opt);
>X	return buf;
>X}
>X
>Xstatic const char *
>Xsppp_state_name(int state)
>X{
>X	switch (state) {
>X	case STATE_INITIAL:	return "initial";
>X	case STATE_STARTING:	return "starting";
>X	case STATE_CLOSED:	return "closed";
>X	case STATE_STOPPED:	return "stopped";
>X	case STATE_CLOSING:	return "closing";
>X	case STATE_STOPPING:	return "stopping";
>X	case STATE_REQ_SENT:	return "req-sent";
>X	case STATE_ACK_RCVD:	return "ack-rcvd";
>X	case STATE_ACK_SENT:	return "ack-sent";
>X	case STATE_OPENED:	return "opened";
>X	}
>X	return "illegal";
>X}
>X
>Xstatic const char *
>Xsppp_phase_name(enum ppp_phase phase)
>X{
>X	switch (phase) {
>X	case PHASE_DEAD:	return "dead";
>X	case PHASE_ESTABLISH:	return "establish";
>X	case PHASE_TERMINATE:	return "terminate";
>X	case PHASE_AUTHENTICATE: return "authenticate";
>X	case PHASE_NETWORK:	return "network";
>X	}
>X	return "illegal";
>X}
>X
>Xstatic const char *
>Xsppp_proto_name(u_short proto)
>X{
>X	static char buf[12];
>X	switch (proto) {
>X	case PPP_LCP:	return "lcp";
>X	case PPP_IPCP:	return "ipcp";
>X	case PPP_PAP:	return "pap";
>X	case PPP_CHAP:	return "chap";
>X	}
>X	snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto);
>X	return buf;
>X}
>X
>Xstatic void
>Xsppp_print_bytes(const u_char *p, u_short len)
>X{
>X	addlog(" %02x", *p++);
>X	while (--len > 0)
>X		addlog("-%02x", *p++);
>X}
>X
>Xstatic void
>Xsppp_print_string(const char *p, u_short len)
>X{
>X	u_char c;
>X
>X	while (len-- > 0) {
>X		c = *p++;
>X		/*
>X		 * Print only ASCII chars directly.  RFC 1994 recommends
>X		 * using only them, but we don't rely on it.  */
>X		if (c < ' ' || c > '~')
>X			addlog("\\x%x", c);
>X		else
>X			addlog("%c", c);
>X	}
>X}
>X
>Xstatic const char *
>Xsppp_dotted_quad(u_long addr)
>X{
>X	static char s[16];
>X	sprintf(s, "%d.%d.%d.%d",
>X		(int)((addr >> 24) & 0xff),
>X		(int)((addr >> 16) & 0xff),
>X		(int)((addr >> 8) & 0xff),
>X		(int)(addr & 0xff));
>X	return s;
>X}
>X
>Xstatic int
>Xsppp_strnlen(u_char *p, int max)
>X{
>X	int len;
>X
>X	for (len = 0; len < max && *p; ++p)
>X		++len;
>X	return len;
>X}
>X
>X/* a dummy, used to drop uninteresting events */
>Xstatic void
>Xsppp_null(struct sppp *unused)
>X{
>X	/* do just nothing */
>X}
>END-of-./usr/src/sys/net/if_spppsubr.c
>echo x - ./usr/src/sys/net/if_spppsubr.c.patch
>sed 's/^X//' >./usr/src/sys/net/if_spppsubr.c.patch << 'END-of-./usr/src/sys/net/if_spppsubr.c.patch'
>X*** if_spppsubr.c	Tue Dec  1 21:20:21 1998
>X--- if_spppsubr.c.new	Tue Mar 16 15:54:10 1999
>X***************
>X*** 603,608 ****
>X--- 603,609 ----
>X  		goto drop;
>X  	}
>X  	IF_ENQUEUE(inq, m);
>X+ 	sp->pp_last_recv = time_second;
>X  	splx(s);
>X  }
>X  
>X***************
>X*** 777,782 ****
>X--- 778,784 ----
>X  	 * according to RFC 1333.
>X  	 */
>X  	ifp->if_obytes += m->m_pkthdr.len + 3;
>X+ 	sp->pp_last_sent = time_second;
>X  	splx (s);
>X  	return (0);
>X  }
>X***************
>X*** 809,814 ****
>X--- 811,817 ----
>X  	sp->pp_up = lcp.Up;
>X  	sp->pp_down = lcp.Down;
>X  
>X+ 	sp->pp_last_recv = sp->pp_last_sent = time_second;
>X  	sppp_lcp_init(sp);
>X  	sppp_ipcp_init(sp);
>X  	sppp_pap_init(sp);
>END-of-./usr/src/sys/net/if_spppsubr.c.patch
>echo x - ./usr/src/sys/net/if_spppsubr.c.orig
>sed 's/^X//' >./usr/src/sys/net/if_spppsubr.c.orig << 'END-of-./usr/src/sys/net/if_spppsubr.c.orig'
>X/*
>X * Synchronous PPP/Cisco link level subroutines.
>X * Keepalive protocol implemented in both Cisco and PPP modes.
>X *
>X * Copyright (C) 1994-1996 Cronyx Engineering Ltd.
>X * Author: Serge Vakulenko, <vak@cronyx.ru>
>X *
>X * Heavily revamped to conform to RFC 1661.
>X * Copyright (C) 1997, Joerg Wunsch.
>X *
>X * This software is distributed with NO WARRANTIES, not even the implied
>X * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>X *
>X * Authors grant any other persons or organisations permission to use
>X * or modify this software as long as this message is kept with the software,
>X * all derivative works or modified versions.
>X *
>X * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
>X *
>X * $Id: if_spppsubr.c,v 1.52 1998/12/27 21:30:44 phk Exp $
>X */
>X
>X#include <sys/param.h>
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#include "opt_inet.h"
>X#include "opt_ipx.h"
>X#endif
>X
>X#ifdef NetBSD1_3
>X#  if NetBSD1_3 > 6
>X#      include "opt_inet.h"
>X#      include "opt_iso.h"
>X#  endif
>X#endif
>X
>X#include <sys/systm.h>
>X#include <sys/kernel.h>
>X#include <sys/sockio.h>
>X#include <sys/socket.h>
>X#include <sys/syslog.h>
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#include <machine/random.h>
>X#endif
>X#include <sys/malloc.h>
>X#include <sys/mbuf.h>
>X
>X#if defined (__OpenBSD__)
>X#include <sys/md5k.h>
>X#else
>X#include <sys/md5.h>
>X#endif
>X
>X#include <net/if.h>
>X#include <net/netisr.h>
>X#include <net/if_types.h>
>X#include <net/route.h>
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#include <machine/random.h>
>X#endif
>X#if defined (__NetBSD__) || defined (__OpenBSD__)
>X#include <machine/cpu.h> /* XXX for softnet */
>X#endif
>X
>X#include <machine/stdarg.h>
>X
>X#ifdef INET
>X#include <netinet/in.h>
>X#include <netinet/in_systm.h>
>X#include <netinet/in_var.h>
>X#include <netinet/ip.h>
>X#include <netinet/tcp.h>
>X# if defined (__FreeBSD__) || defined (__OpenBSD__)
>X#  include <netinet/if_ether.h>
>X# else
>X#  include <net/ethertypes.h>
>X# endif
>X#else
>X# error Huh? sppp without INET?
>X#endif
>X
>X#ifdef IPX
>X#include <netipx/ipx.h>
>X#include <netipx/ipx_if.h>
>X#endif
>X
>X#ifdef NS
>X#include <netns/ns.h>
>X#include <netns/ns_if.h>
>X#endif
>X
>X#ifdef ISO
>X#include <netiso/argo_debug.h>
>X#include <netiso/iso.h>
>X#include <netiso/iso_var.h>
>X#include <netiso/iso_snpac.h>
>X#endif
>X
>X#include <net/if_sppp.h>
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X# define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg, handle)
>X# define TIMEOUT(fun, arg1, arg2, handle) handle = timeout(fun, arg1, arg2)
>X# define IOCTL_CMD_T	u_long
>X#else
>X# define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg)
>X# define TIMEOUT(fun, arg1, arg2, handle) timeout(fun, arg1, arg2)
>X# define IOCTL_CMD_T	int
>X#endif
>X
>X#define MAXALIVECNT     3               /* max. alive packets */
>X
>X/*
>X * Interface flags that can be set in an ifconfig command.
>X *
>X * Setting link0 will make the link passive, i.e. it will be marked
>X * as being administrative openable, but won't be opened to begin
>X * with.  Incoming calls will be answered, or subsequent calls with
>X * -link1 will cause the administrative open of the LCP layer.
>X *
>X * Setting link1 will cause the link to auto-dial only as packets
>X * arrive to be sent.
>X *
>X * Setting IFF_DEBUG will syslog the option negotiation and state
>X * transitions at level kern.debug.  Note: all logs consistently look
>X * like
>X *
>X *   <if-name><unit>: <proto-name> <additional info...>
>X *
>X * with <if-name><unit> being something like "bppp0", and <proto-name>
>X * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
>X */
>X
>X#define IFF_PASSIVE	IFF_LINK0	/* wait passively for connection */
>X#define IFF_AUTO	IFF_LINK1	/* auto-dial on output */
>X
>X#define PPP_ALLSTATIONS 0xff		/* All-Stations broadcast address */
>X#define PPP_UI		0x03		/* Unnumbered Information */
>X#define PPP_IP		0x0021		/* Internet Protocol */
>X#define PPP_ISO		0x0023		/* ISO OSI Protocol */
>X#define PPP_XNS		0x0025		/* Xerox NS Protocol */
>X#define PPP_IPX		0x002b		/* Novell IPX Protocol */
>X#define PPP_LCP		0xc021		/* Link Control Protocol */
>X#define PPP_PAP		0xc023		/* Password Authentication Protocol */
>X#define PPP_CHAP	0xc223		/* Challenge-Handshake Auth Protocol */
>X#define PPP_IPCP	0x8021		/* Internet Protocol Control Protocol */
>X
>X#define CONF_REQ	1		/* PPP configure request */
>X#define CONF_ACK	2		/* PPP configure acknowledge */
>X#define CONF_NAK	3		/* PPP configure negative ack */
>X#define CONF_REJ	4		/* PPP configure reject */
>X#define TERM_REQ	5		/* PPP terminate request */
>X#define TERM_ACK	6		/* PPP terminate acknowledge */
>X#define CODE_REJ	7		/* PPP code reject */
>X#define PROTO_REJ	8		/* PPP protocol reject */
>X#define ECHO_REQ	9		/* PPP echo request */
>X#define ECHO_REPLY	10		/* PPP echo reply */
>X#define DISC_REQ	11		/* PPP discard request */
>X
>X#define LCP_OPT_MRU		1	/* maximum receive unit */
>X#define LCP_OPT_ASYNC_MAP	2	/* async control character map */
>X#define LCP_OPT_AUTH_PROTO	3	/* authentication protocol */
>X#define LCP_OPT_QUAL_PROTO	4	/* quality protocol */
>X#define LCP_OPT_MAGIC		5	/* magic number */
>X#define LCP_OPT_RESERVED	6	/* reserved */
>X#define LCP_OPT_PROTO_COMP	7	/* protocol field compression */
>X#define LCP_OPT_ADDR_COMP	8	/* address/control field compression */
>X
>X#define IPCP_OPT_ADDRESSES	1	/* both IP addresses; deprecated */
>X#define IPCP_OPT_COMPRESSION	2	/* IP compression protocol (VJ) */
>X#define IPCP_OPT_ADDRESS	3	/* local IP address */
>X
>X#define PAP_REQ			1	/* PAP name/password request */
>X#define PAP_ACK			2	/* PAP acknowledge */
>X#define PAP_NAK			3	/* PAP fail */
>X
>X#define CHAP_CHALLENGE		1	/* CHAP challenge request */
>X#define CHAP_RESPONSE		2	/* CHAP challenge response */
>X#define CHAP_SUCCESS		3	/* CHAP response ok */
>X#define CHAP_FAILURE		4	/* CHAP response failed */
>X
>X#define CHAP_MD5		5	/* hash algorithm - MD5 */
>X
>X#define CISCO_MULTICAST		0x8f	/* Cisco multicast address */
>X#define CISCO_UNICAST		0x0f	/* Cisco unicast address */
>X#define CISCO_KEEPALIVE		0x8035	/* Cisco keepalive protocol */
>X#define CISCO_ADDR_REQ		0	/* Cisco address request */
>X#define CISCO_ADDR_REPLY	1	/* Cisco address reply */
>X#define CISCO_KEEPALIVE_REQ	2	/* Cisco keepalive request */
>X
>X/* states are named and numbered according to RFC 1661 */
>X#define STATE_INITIAL	0
>X#define STATE_STARTING	1
>X#define STATE_CLOSED	2
>X#define STATE_STOPPED	3
>X#define STATE_CLOSING	4
>X#define STATE_STOPPING	5
>X#define STATE_REQ_SENT	6
>X#define STATE_ACK_RCVD	7
>X#define STATE_ACK_SENT	8
>X#define STATE_OPENED	9
>X
>Xstruct ppp_header {
>X	u_char address;
>X	u_char control;
>X	u_short protocol;
>X};
>X#define PPP_HEADER_LEN          sizeof (struct ppp_header)
>X
>Xstruct lcp_header {
>X	u_char type;
>X	u_char ident;
>X	u_short len;
>X};
>X#define LCP_HEADER_LEN          sizeof (struct lcp_header)
>X
>Xstruct cisco_packet {
>X	u_long type;
>X	u_long par1;
>X	u_long par2;
>X	u_short rel;
>X	u_short time0;
>X	u_short time1;
>X};
>X#define CISCO_PACKET_LEN 18
>X
>X/*
>X * We follow the spelling and capitalization of RFC 1661 here, to make
>X * it easier comparing with the standard.  Please refer to this RFC in
>X * case you can't make sense out of these abbreviation; it will also
>X * explain the semantics related to the various events and actions.
>X */
>Xstruct cp {
>X	u_short	proto;		/* PPP control protocol number */
>X	u_char protoidx;	/* index into state table in struct sppp */
>X	u_char flags;
>X#define CP_LCP		0x01	/* this is the LCP */
>X#define CP_AUTH		0x02	/* this is an authentication protocol */
>X#define CP_NCP		0x04	/* this is a NCP */
>X#define CP_QUAL		0x08	/* this is a quality reporting protocol */
>X	const char *name;	/* name of this control protocol */
>X	/* event handlers */
>X	void	(*Up)(struct sppp *sp);
>X	void	(*Down)(struct sppp *sp);
>X	void	(*Open)(struct sppp *sp);
>X	void	(*Close)(struct sppp *sp);
>X	void	(*TO)(void *sp);
>X	int	(*RCR)(struct sppp *sp, struct lcp_header *h, int len);
>X	void	(*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
>X	void	(*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
>X	/* actions */
>X	void	(*tlu)(struct sppp *sp);
>X	void	(*tld)(struct sppp *sp);
>X	void	(*tls)(struct sppp *sp);
>X	void	(*tlf)(struct sppp *sp);
>X	void	(*scr)(struct sppp *sp);
>X};
>X
>Xstatic struct sppp *spppq;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>Xstatic struct callout_handle keepalive_ch;
>X#endif
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#define	SPP_FMT		"%s%d: "
>X#define	SPP_ARGS(ifp)	(ifp)->if_name, (ifp)->if_unit
>X#else
>X#define	SPP_FMT		"%s: "
>X#define	SPP_ARGS(ifp)	(ifp)->if_xname
>X#endif
>X
>X/*
>X * The following disgusting hack gets around the problem that IP TOS
>X * can't be set yet.  We want to put "interactive" traffic on a high
>X * priority queue.  To decide if traffic is interactive, we check that
>X * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
>X *
>X * XXX is this really still necessary?  - joerg -
>X */
>Xstatic u_short interactive_ports[8] = {
>X	0,	513,	0,	0,
>X	0,	21,	0,	23,
>X};
>X#define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
>X
>X/* almost every function needs these */
>X#define STDDCL							\
>X	struct ifnet *ifp = &sp->pp_if;				\
>X	int debug = ifp->if_flags & IFF_DEBUG
>X
>Xstatic int sppp_output(struct ifnet *ifp, struct mbuf *m,
>X		       struct sockaddr *dst, struct rtentry *rt);
>X
>Xstatic void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
>Xstatic void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
>X
>Xstatic void sppp_cp_input(const struct cp *cp, struct sppp *sp,
>X			  struct mbuf *m);
>Xstatic void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
>X			 u_char ident, u_short len, void *data);
>X/* static void sppp_cp_timeout(void *arg); */
>Xstatic void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
>X				 int newstate);
>Xstatic void sppp_auth_send(const struct cp *cp,
>X			   struct sppp *sp, unsigned int type, unsigned int id,
>X			   ...);
>X
>Xstatic void sppp_up_event(const struct cp *cp, struct sppp *sp);
>Xstatic void sppp_down_event(const struct cp *cp, struct sppp *sp);
>Xstatic void sppp_open_event(const struct cp *cp, struct sppp *sp);
>Xstatic void sppp_close_event(const struct cp *cp, struct sppp *sp);
>Xstatic void sppp_to_event(const struct cp *cp, struct sppp *sp);
>X
>Xstatic void sppp_null(struct sppp *sp);
>X
>Xstatic void sppp_lcp_init(struct sppp *sp);
>Xstatic void sppp_lcp_up(struct sppp *sp);
>Xstatic void sppp_lcp_down(struct sppp *sp);
>Xstatic void sppp_lcp_open(struct sppp *sp);
>Xstatic void sppp_lcp_close(struct sppp *sp);
>Xstatic void sppp_lcp_TO(void *sp);
>Xstatic int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_lcp_tlu(struct sppp *sp);
>Xstatic void sppp_lcp_tld(struct sppp *sp);
>Xstatic void sppp_lcp_tls(struct sppp *sp);
>Xstatic void sppp_lcp_tlf(struct sppp *sp);
>Xstatic void sppp_lcp_scr(struct sppp *sp);
>Xstatic void sppp_lcp_check_and_close(struct sppp *sp);
>Xstatic int sppp_ncp_check(struct sppp *sp);
>X
>Xstatic void sppp_ipcp_init(struct sppp *sp);
>Xstatic void sppp_ipcp_up(struct sppp *sp);
>Xstatic void sppp_ipcp_down(struct sppp *sp);
>Xstatic void sppp_ipcp_open(struct sppp *sp);
>Xstatic void sppp_ipcp_close(struct sppp *sp);
>Xstatic void sppp_ipcp_TO(void *sp);
>Xstatic int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
>Xstatic void sppp_ipcp_tlu(struct sppp *sp);
>Xstatic void sppp_ipcp_tld(struct sppp *sp);
>Xstatic void sppp_ipcp_tls(struct sppp *sp);
>Xstatic void sppp_ipcp_tlf(struct sppp *sp);
>Xstatic void sppp_ipcp_scr(struct sppp *sp);
>X
>Xstatic void sppp_pap_input(struct sppp *sp, struct mbuf *m);
>Xstatic void sppp_pap_init(struct sppp *sp);
>Xstatic void sppp_pap_open(struct sppp *sp);
>Xstatic void sppp_pap_close(struct sppp *sp);
>Xstatic void sppp_pap_TO(void *sp);
>Xstatic void sppp_pap_my_TO(void *sp);
>Xstatic void sppp_pap_tlu(struct sppp *sp);
>Xstatic void sppp_pap_tld(struct sppp *sp);
>Xstatic void sppp_pap_scr(struct sppp *sp);
>X
>Xstatic void sppp_chap_input(struct sppp *sp, struct mbuf *m);
>Xstatic void sppp_chap_init(struct sppp *sp);
>Xstatic void sppp_chap_open(struct sppp *sp);
>Xstatic void sppp_chap_close(struct sppp *sp);
>Xstatic void sppp_chap_TO(void *sp);
>Xstatic void sppp_chap_tlu(struct sppp *sp);
>Xstatic void sppp_chap_tld(struct sppp *sp);
>Xstatic void sppp_chap_scr(struct sppp *sp);
>X
>Xstatic const char *sppp_auth_type_name(u_short proto, u_char type);
>Xstatic const char *sppp_cp_type_name(u_char type);
>Xstatic const char *sppp_dotted_quad(u_long addr);
>Xstatic const char *sppp_ipcp_opt_name(u_char opt);
>Xstatic const char *sppp_lcp_opt_name(u_char opt);
>Xstatic const char *sppp_phase_name(enum ppp_phase phase);
>Xstatic const char *sppp_proto_name(u_short proto);
>Xstatic const char *sppp_state_name(int state);
>Xstatic int sppp_params(struct sppp *sp, u_long cmd, void *data);
>Xstatic int sppp_strnlen(u_char *p, int max);
>Xstatic void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
>X			      u_long *srcmask);
>Xstatic void sppp_keepalive(void *dummy);
>Xstatic void sppp_phase_network(struct sppp *sp);
>Xstatic void sppp_print_bytes(const u_char *p, u_short len);
>Xstatic void sppp_print_string(const char *p, u_short len);
>Xstatic void sppp_qflush(struct ifqueue *ifq);
>Xstatic void sppp_set_ip_addr(struct sppp *sp, u_long src);
>X
>X/* our control protocol descriptors */
>Xstatic const struct cp lcp = {
>X	PPP_LCP, IDX_LCP, CP_LCP, "lcp",
>X	sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
>X	sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
>X	sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
>X	sppp_lcp_scr
>X};
>X
>Xstatic const struct cp ipcp = {
>X	PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp",
>X	sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
>X	sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
>X	sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
>X	sppp_ipcp_scr
>X};
>X
>Xstatic const struct cp pap = {
>X	PPP_PAP, IDX_PAP, CP_AUTH, "pap",
>X	sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
>X	sppp_pap_TO, 0, 0, 0,
>X	sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
>X	sppp_pap_scr
>X};
>X
>Xstatic const struct cp chap = {
>X	PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
>X	sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
>X	sppp_chap_TO, 0, 0, 0,
>X	sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
>X	sppp_chap_scr
>X};
>X
>Xstatic const struct cp *cps[IDX_COUNT] = {
>X	&lcp,			/* IDX_LCP */
>X	&ipcp,			/* IDX_IPCP */
>X	&pap,			/* IDX_PAP */
>X	&chap,			/* IDX_CHAP */
>X};
>X
>X
>X/*
>X * Exported functions, comprising our interface to the lower layer.
>X */
>X
>X/*
>X * Process the received packet.
>X */
>Xvoid
>Xsppp_input(struct ifnet *ifp, struct mbuf *m)
>X{
>X	struct ppp_header *h;
>X	struct ifqueue *inq = 0;
>X	int s;
>X	struct sppp *sp = (struct sppp *)ifp;
>X	int debug = ifp->if_flags & IFF_DEBUG;
>X
>X	if (ifp->if_flags & IFF_UP)
>X		/* Count received bytes, add FCS and one flag */
>X		ifp->if_ibytes += m->m_pkthdr.len + 3;
>X
>X	if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
>X		/* Too small packet, drop it. */
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "input packet is too small, %d bytes\n",
>X			    SPP_ARGS(ifp), m->m_pkthdr.len);
>X	  drop:
>X		++ifp->if_ierrors;
>X		++ifp->if_iqdrops;
>X		m_freem (m);
>X		return;
>X	}
>X
>X	/* Get PPP header. */
>X	h = mtod (m, struct ppp_header*);
>X	m_adj (m, PPP_HEADER_LEN);
>X
>X	switch (h->address) {
>X	case PPP_ALLSTATIONS:
>X		if (h->control != PPP_UI)
>X			goto invalid;
>X		if (sp->pp_flags & PP_CISCO) {
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "PPP packet in Cisco mode "
>X				    "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
>X				    SPP_ARGS(ifp),
>X				    h->address, h->control, ntohs(h->protocol));
>X			goto drop;
>X		}
>X		switch (ntohs (h->protocol)) {
>X		default:
>X			if (sp->state[IDX_LCP] == STATE_OPENED)
>X				sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
>X					++sp->pp_seq, m->m_pkthdr.len + 2,
>X					&h->protocol);
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "invalid input protocol "
>X				    "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
>X				    SPP_ARGS(ifp),
>X				    h->address, h->control, ntohs(h->protocol));
>X			++ifp->if_noproto;
>X			goto drop;
>X		case PPP_LCP:
>X			sppp_cp_input(&lcp, sp, m);
>X			m_freem (m);
>X			return;
>X		case PPP_PAP:
>X			if (sp->pp_phase >= PHASE_AUTHENTICATE)
>X				sppp_pap_input(sp, m);
>X			m_freem (m);
>X			return;
>X		case PPP_CHAP:
>X			if (sp->pp_phase >= PHASE_AUTHENTICATE)
>X				sppp_chap_input(sp, m);
>X			m_freem (m);
>X			return;
>X#ifdef INET
>X		case PPP_IPCP:
>X			if (sp->pp_phase == PHASE_NETWORK)
>X				sppp_cp_input(&ipcp, sp, m);
>X			m_freem (m);
>X			return;
>X		case PPP_IP:
>X			if (sp->state[IDX_IPCP] == STATE_OPENED) {
>X				schednetisr (NETISR_IP);
>X				inq = &ipintrq;
>X			}
>X			break;
>X#endif
>X#ifdef IPX
>X		case PPP_IPX:
>X			/* IPX IPXCP not implemented yet */
>X			if (sp->pp_phase == PHASE_NETWORK) {
>X				schednetisr (NETISR_IPX);
>X				inq = &ipxintrq;
>X			}
>X			break;
>X#endif
>X#ifdef NS
>X		case PPP_XNS:
>X			/* XNS IDPCP not implemented yet */
>X			if (sp->pp_phase == PHASE_NETWORK) {
>X				schednetisr (NETISR_NS);
>X				inq = &nsintrq;
>X			}
>X			break;
>X#endif
>X#ifdef ISO
>X		case PPP_ISO:
>X			/* OSI NLCP not implemented yet */
>X			if (sp->pp_phase == PHASE_NETWORK) {
>X				schednetisr (NETISR_ISO);
>X				inq = &clnlintrq;
>X			}
>X			break;
>X#endif
>X		}
>X		break;
>X	case CISCO_MULTICAST:
>X	case CISCO_UNICAST:
>X		/* Don't check the control field here (RFC 1547). */
>X		if (! (sp->pp_flags & PP_CISCO)) {
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "Cisco packet in PPP mode "
>X				    "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
>X				    SPP_ARGS(ifp),
>X				    h->address, h->control, ntohs(h->protocol));
>X			goto drop;
>X		}
>X		switch (ntohs (h->protocol)) {
>X		default:
>X			++ifp->if_noproto;
>X			goto invalid;
>X		case CISCO_KEEPALIVE:
>X			sppp_cisco_input ((struct sppp*) ifp, m);
>X			m_freem (m);
>X			return;
>X#ifdef INET
>X		case ETHERTYPE_IP:
>X			schednetisr (NETISR_IP);
>X			inq = &ipintrq;
>X			break;
>X#endif
>X#ifdef IPX
>X		case ETHERTYPE_IPX:
>X			schednetisr (NETISR_IPX);
>X			inq = &ipxintrq;
>X			break;
>X#endif
>X#ifdef NS
>X		case ETHERTYPE_NS:
>X			schednetisr (NETISR_NS);
>X			inq = &nsintrq;
>X			break;
>X#endif
>X		}
>X		break;
>X	default:        /* Invalid PPP packet. */
>X	  invalid:
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "invalid input packet "
>X			    "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
>X			    SPP_ARGS(ifp),
>X			    h->address, h->control, ntohs(h->protocol));
>X		goto drop;
>X	}
>X
>X	if (! (ifp->if_flags & IFF_UP) || ! inq)
>X		goto drop;
>X
>X	/* Check queue. */
>X	s = splimp();
>X	if (IF_QFULL (inq)) {
>X		/* Queue overflow. */
>X		IF_DROP(inq);
>X		splx(s);
>X		if (debug)
>X			log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n",
>X				SPP_ARGS(ifp));
>X		goto drop;
>X	}
>X	IF_ENQUEUE(inq, m);
>X	splx(s);
>X}
>X
>X/*
>X * Enqueue transmit packet.
>X */
>Xstatic int
>Xsppp_output(struct ifnet *ifp, struct mbuf *m,
>X	    struct sockaddr *dst, struct rtentry *rt)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X	struct ppp_header *h;
>X	struct ifqueue *ifq;
>X	int s, rv = 0;
>X	int debug = ifp->if_flags & IFF_DEBUG;
>X
>X	s = splimp();
>X
>X	if ((ifp->if_flags & IFF_UP) == 0 ||
>X	    (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
>X		m_freem (m);
>X		splx (s);
>X		return (ENETDOWN);
>X	}
>X
>X	if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
>X		/*
>X		 * Interface is not yet running, but auto-dial.  Need
>X		 * to start LCP for it.
>X		 */
>X		ifp->if_flags |= IFF_RUNNING;
>X		splx(s);
>X		lcp.Open(sp);
>X		s = splimp();
>X	}
>X
>X	ifq = &ifp->if_snd;
>X#ifdef INET
>X	if (dst->sa_family == AF_INET) {
>X		/* XXX Check mbuf length here? */
>X		struct ip *ip = mtod (m, struct ip*);
>X		struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
>X
>X		/*
>X		 * When using dynamic local IP address assignment by using
>X		 * 0.0.0.0 as a local address, the first TCP session will
>X		 * not connect because the local TCP checksum is computed
>X		 * using 0.0.0.0 which will later become our real IP address
>X		 * so the TCP checksum computed at the remote end will
>X		 * become invalid. So we
>X		 * - don't let packets with src ip addr 0 thru
>X		 * - we flag TCP packets with src ip 0 as an error
>X		 */	
>X
>X		if(ip->ip_src.s_addr == INADDR_ANY)	/* -hm */
>X		{
>X			m_freem(m);
>X			splx(s);
>X			if(ip->ip_p == IPPROTO_TCP)
>X				return(EADDRNOTAVAIL);
>X			else
>X				return(0);
>X		}
>X		
>X		/*
>X		 * Put low delay, telnet, rlogin and ftp control packets
>X		 * in front of the queue.
>X		 */
>X		if (IF_QFULL (&sp->pp_fastq))
>X			;
>X		else if (ip->ip_tos & IPTOS_LOWDELAY)
>X			ifq = &sp->pp_fastq;
>X		else if (m->m_len < sizeof *ip + sizeof *tcp)
>X			;
>X		else if (ip->ip_p != IPPROTO_TCP)
>X			;
>X		else if (INTERACTIVE (ntohs (tcp->th_sport)))
>X			ifq = &sp->pp_fastq;
>X		else if (INTERACTIVE (ntohs (tcp->th_dport)))
>X			ifq = &sp->pp_fastq;
>X	}
>X#endif
>X
>X	/*
>X	 * Prepend general data packet PPP header. For now, IP only.
>X	 */
>X	M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT);
>X	if (! m) {
>X		if (debug)
>X			log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
>X				SPP_ARGS(ifp));
>X		++ifp->if_oerrors;
>X		splx (s);
>X		return (ENOBUFS);
>X	}
>X	/*
>X	 * May want to check size of packet
>X	 * (albeit due to the implementation it's always enough)
>X	 */
>X	h = mtod (m, struct ppp_header*);
>X	if (sp->pp_flags & PP_CISCO) {
>X		h->address = CISCO_UNICAST;        /* unicast address */
>X		h->control = 0;
>X	} else {
>X		h->address = PPP_ALLSTATIONS;        /* broadcast address */
>X		h->control = PPP_UI;                 /* Unnumbered Info */
>X	}
>X
>X	switch (dst->sa_family) {
>X#ifdef INET
>X	case AF_INET:   /* Internet Protocol */
>X		if (sp->pp_flags & PP_CISCO)
>X			h->protocol = htons (ETHERTYPE_IP);
>X		else {
>X			/*
>X			 * Don't choke with an ENETDOWN early.  It's
>X			 * possible that we just started dialing out,
>X			 * so don't drop the packet immediately.  If
>X			 * we notice that we run out of buffer space
>X			 * below, we will however remember that we are
>X			 * not ready to carry IP packets, and return
>X			 * ENETDOWN, as opposed to ENOBUFS.
>X			 */
>X			h->protocol = htons(PPP_IP);
>X			if (sp->state[IDX_IPCP] != STATE_OPENED)
>X				rv = ENETDOWN;
>X		}
>X		break;
>X#endif
>X#ifdef NS
>X	case AF_NS:     /* Xerox NS Protocol */
>X		h->protocol = htons ((sp->pp_flags & PP_CISCO) ?
>X			ETHERTYPE_NS : PPP_XNS);
>X		break;
>X#endif
>X#ifdef IPX
>X	case AF_IPX:     /* Novell IPX Protocol */
>X		h->protocol = htons ((sp->pp_flags & PP_CISCO) ?
>X			ETHERTYPE_IPX : PPP_IPX);
>X		break;
>X#endif
>X#ifdef ISO
>X	case AF_ISO:    /* ISO OSI Protocol */
>X		if (sp->pp_flags & PP_CISCO)
>X			goto nosupport;
>X		h->protocol = htons (PPP_ISO);
>X		break;
>Xnosupport:
>X#endif
>X	default:
>X		m_freem (m);
>X		++ifp->if_oerrors;
>X		splx (s);
>X		return (EAFNOSUPPORT);
>X	}
>X
>X	/*
>X	 * Queue message on interface, and start output if interface
>X	 * not yet active.
>X	 */
>X	if (IF_QFULL (ifq)) {
>X		IF_DROP (&ifp->if_snd);
>X		m_freem (m);
>X		++ifp->if_oerrors;
>X		splx (s);
>X		return (rv? rv: ENOBUFS);
>X	}
>X	IF_ENQUEUE (ifq, m);
>X	if (! (ifp->if_flags & IFF_OACTIVE))
>X		(*ifp->if_start) (ifp);
>X
>X	/*
>X	 * Count output packets and bytes.
>X	 * The packet length includes header, FCS and 1 flag,
>X	 * according to RFC 1333.
>X	 */
>X	ifp->if_obytes += m->m_pkthdr.len + 3;
>X	splx (s);
>X	return (0);
>X}
>X
>Xvoid
>Xsppp_attach(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X
>X	/* Initialize keepalive handler. */
>X	if (! spppq)
>X		TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch);
>X
>X	/* Insert new entry into the keepalive list. */
>X	sp->pp_next = spppq;
>X	spppq = sp;
>X
>X	sp->pp_if.if_mtu = PP_MTU;
>X	sp->pp_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
>X	sp->pp_if.if_type = IFT_PPP;
>X	sp->pp_if.if_output = sppp_output;
>X#if 0
>X	sp->pp_flags = PP_KEEPALIVE;
>X#endif
>X	sp->pp_fastq.ifq_maxlen = 32;
>X	sp->pp_cpq.ifq_maxlen = 20;
>X	sp->pp_loopcnt = 0;
>X	sp->pp_alivecnt = 0;
>X	sp->pp_seq = 0;
>X	sp->pp_rseq = 0;
>X	sp->pp_phase = PHASE_DEAD;
>X	sp->pp_up = lcp.Up;
>X	sp->pp_down = lcp.Down;
>X
>X	sppp_lcp_init(sp);
>X	sppp_ipcp_init(sp);
>X	sppp_pap_init(sp);
>X	sppp_chap_init(sp);
>X}
>X
>Xvoid
>Xsppp_detach(struct ifnet *ifp)
>X{
>X	struct sppp **q, *p, *sp = (struct sppp*) ifp;
>X	int i;
>X
>X	/* Remove the entry from the keepalive list. */
>X	for (q = &spppq; (p = *q); q = &p->pp_next)
>X		if (p == sp) {
>X			*q = p->pp_next;
>X			break;
>X		}
>X
>X	/* Stop keepalive handler. */
>X	if (! spppq)
>X		UNTIMEOUT(sppp_keepalive, 0, keepalive_ch);
>X
>X	for (i = 0; i < IDX_COUNT; i++)
>X		UNTIMEOUT((cps[i])->TO, (void *)sp, sp->ch[i]);
>X	UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
>X}
>X
>X/*
>X * Flush the interface output queue.
>X */
>Xvoid
>Xsppp_flush(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X
>X	sppp_qflush (&sp->pp_if.if_snd);
>X	sppp_qflush (&sp->pp_fastq);
>X	sppp_qflush (&sp->pp_cpq);
>X}
>X
>X/*
>X * Check if the output queue is empty.
>X */
>Xint
>Xsppp_isempty(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X	int empty, s;
>X
>X	s = splimp();
>X	empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head &&
>X		!sp->pp_if.if_snd.ifq_head;
>X	splx(s);
>X	return (empty);
>X}
>X
>X/*
>X * Get next packet to send.
>X */
>Xstruct mbuf *
>Xsppp_dequeue(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*) ifp;
>X	struct mbuf *m;
>X	int s;
>X
>X	s = splimp();
>X	/*
>X	 * Process only the control protocol queue until we have at
>X	 * least one NCP open.
>X	 *
>X	 * Do always serve all three queues in Cisco mode.
>X	 */
>X	IF_DEQUEUE(&sp->pp_cpq, m);
>X	if (m == NULL &&
>X	    (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) {
>X		IF_DEQUEUE(&sp->pp_fastq, m);
>X		if (m == NULL)
>X			IF_DEQUEUE (&sp->pp_if.if_snd, m);
>X	}
>X	splx(s);
>X	return m;
>X}
>X
>X/*
>X * Pick the next packet, do not remove it from the queue.
>X */
>Xstruct mbuf *
>Xsppp_pick(struct ifnet *ifp)
>X{
>X	struct sppp *sp = (struct sppp*)ifp;
>X	struct mbuf *m;
>X	int s;
>X
>X	s= splimp ();
>X
>X	m = sp->pp_cpq.ifq_head;
>X	if (m == NULL &&
>X	    (sp->pp_phase == PHASE_NETWORK ||
>X	     (sp->pp_flags & PP_CISCO) != 0))
>X		if ((m = sp->pp_fastq.ifq_head) == NULL)
>X			m = sp->pp_if.if_snd.ifq_head;
>X	splx (s);
>X	return (m);
>X}
>X
>X/*
>X * Process an ioctl request.  Called on low priority level.
>X */
>Xint
>Xsppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
>X{
>X	struct ifreq *ifr = (struct ifreq*) data;
>X	struct sppp *sp = (struct sppp*) ifp;
>X	int s, rv, going_up, going_down, newmode;
>X
>X	s = splimp();
>X	rv = 0;
>X	switch (cmd) {
>X	case SIOCAIFADDR:
>X	case SIOCSIFDSTADDR:
>X		break;
>X
>X	case SIOCSIFADDR:
>X		if_up(ifp);
>X		/* fall through... */
>X
>X	case SIOCSIFFLAGS:
>X		going_up = ifp->if_flags & IFF_UP &&
>X			(ifp->if_flags & IFF_RUNNING) == 0;
>X		going_down = (ifp->if_flags & IFF_UP) == 0 &&
>X			ifp->if_flags & IFF_RUNNING;
>X		newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE);
>X		if (newmode == (IFF_AUTO | IFF_PASSIVE)) {
>X			/* sanity */
>X			newmode = IFF_PASSIVE;
>X			ifp->if_flags &= ~IFF_AUTO;
>X		}
>X
>X		if (going_up || going_down)
>X			lcp.Close(sp);
>X		if (going_up && newmode == 0) {
>X			/* neither auto-dial nor passive */
>X			ifp->if_flags |= IFF_RUNNING;
>X			if (!(sp->pp_flags & PP_CISCO))
>X				lcp.Open(sp);
>X		} else if (going_down) {
>X			sppp_flush(ifp);
>X			ifp->if_flags &= ~IFF_RUNNING;
>X		}
>X
>X		break;
>X
>X#ifdef SIOCSIFMTU
>X#ifndef ifr_mtu
>X#define ifr_mtu ifr_metric
>X#endif
>X	case SIOCSIFMTU:
>X		if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
>X			return (EINVAL);
>X		ifp->if_mtu = ifr->ifr_mtu;
>X		break;
>X#endif
>X#ifdef SLIOCSETMTU
>X	case SLIOCSETMTU:
>X		if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
>X			return (EINVAL);
>X		ifp->if_mtu = *(short*)data;
>X		break;
>X#endif
>X#ifdef SIOCGIFMTU
>X	case SIOCGIFMTU:
>X		ifr->ifr_mtu = ifp->if_mtu;
>X		break;
>X#endif
>X#ifdef SLIOCGETMTU
>X	case SLIOCGETMTU:
>X		*(short*)data = ifp->if_mtu;
>X		break;
>X#endif
>X	case SIOCADDMULTI:
>X	case SIOCDELMULTI:
>X		break;
>X
>X	case SIOCGIFGENERIC:
>X	case SIOCSIFGENERIC:
>X		rv = sppp_params(sp, cmd, data);
>X		break;
>X
>X	default:
>X		rv = ENOTTY;
>X	}
>X	splx(s);
>X	return rv;
>X}
>X
>X
>X/*
>X * Cisco framing implementation.
>X */
>X
>X/*
>X * Handle incoming Cisco keepalive protocol packets.
>X */
>Xstatic void
>Xsppp_cisco_input(struct sppp *sp, struct mbuf *m)
>X{
>X	STDDCL;
>X	struct cisco_packet *h;
>X	u_long me, mymask;
>X
>X	if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "cisco invalid packet length: %d bytes\n",
>X			    SPP_ARGS(ifp), m->m_pkthdr.len);
>X		return;
>X	}
>X	h = mtod (m, struct cisco_packet*);
>X	if (debug)
>X		log(LOG_DEBUG,
>X		    SPP_FMT "cisco input: %d bytes "
>X		    "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
>X		    SPP_ARGS(ifp), m->m_pkthdr.len,
>X		    (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
>X		    (u_int)h->time0, (u_int)h->time1);
>X	switch (ntohl (h->type)) {
>X	default:
>X		if (debug)
>X			addlog(SPP_FMT "cisco unknown packet type: 0x%lx\n",
>X			       SPP_ARGS(ifp), (u_long)ntohl (h->type));
>X		break;
>X	case CISCO_ADDR_REPLY:
>X		/* Reply on address request, ignore */
>X		break;
>X	case CISCO_KEEPALIVE_REQ:
>X		sp->pp_alivecnt = 0;
>X		sp->pp_rseq = ntohl (h->par1);
>X		if (sp->pp_seq == sp->pp_rseq) {
>X			/* Local and remote sequence numbers are equal.
>X			 * Probably, the line is in loopback mode. */
>X			if (sp->pp_loopcnt >= MAXALIVECNT) {
>X				printf (SPP_FMT "loopback\n",
>X					SPP_ARGS(ifp));
>X				sp->pp_loopcnt = 0;
>X				if (ifp->if_flags & IFF_UP) {
>X					if_down (ifp);
>X					sppp_qflush (&sp->pp_cpq);
>X				}
>X			}
>X			++sp->pp_loopcnt;
>X
>X			/* Generate new local sequence number */
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X			sp->pp_seq = random();
>X#else
>X			sp->pp_seq ^= time.tv_sec ^ time.tv_usec;
>X#endif
>X			break;
>X		}
>X		sp->pp_loopcnt = 0;
>X		if (! (ifp->if_flags & IFF_UP) &&
>X		    (ifp->if_flags & IFF_RUNNING)) {
>X			if_up(ifp);
>X			printf (SPP_FMT "up\n", SPP_ARGS(ifp));
>X		}
>X		break;
>X	case CISCO_ADDR_REQ:
>X		sppp_get_ip_addrs(sp, &me, 0, &mymask);
>X		if (me != 0L)
>X			sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
>X		break;
>X	}
>X}
>X
>X/*
>X * Send Cisco keepalive packet.
>X */
>Xstatic void
>Xsppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
>X{
>X	STDDCL;
>X	struct ppp_header *h;
>X	struct cisco_packet *ch;
>X	struct mbuf *m;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	struct timeval tv;
>X#else
>X	u_long t = (time.tv_sec - boottime.tv_sec) * 1000;
>X#endif
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	getmicrouptime(&tv);
>X#endif
>X	
>X	MGETHDR (m, M_DONTWAIT, MT_DATA);
>X	if (! m)
>X		return;
>X	m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
>X	m->m_pkthdr.rcvif = 0;
>X
>X	h = mtod (m, struct ppp_header*);
>X	h->address = CISCO_MULTICAST;
>X	h->control = 0;
>X	h->protocol = htons (CISCO_KEEPALIVE);
>X
>X	ch = (struct cisco_packet*) (h + 1);
>X	ch->type = htonl (type);
>X	ch->par1 = htonl (par1);
>X	ch->par2 = htonl (par2);
>X	ch->rel = -1;
>X
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
>X	ch->time1 = htons ((u_short) tv.tv_sec);
>X#else
>X	ch->time0 = htons ((u_short) (t >> 16));
>X	ch->time1 = htons ((u_short) t);
>X#endif
>X
>X	if (debug)
>X		log(LOG_DEBUG,
>X		    SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
>X			SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
>X			(u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
>X
>X	if (IF_QFULL (&sp->pp_cpq)) {
>X		IF_DROP (&sp->pp_fastq);
>X		IF_DROP (&ifp->if_snd);
>X		m_freem (m);
>X	} else
>X		IF_ENQUEUE (&sp->pp_cpq, m);
>X	if (! (ifp->if_flags & IFF_OACTIVE))
>X		(*ifp->if_start) (ifp);
>X	ifp->if_obytes += m->m_pkthdr.len + 3;
>X}
>X
>X/*
>X * PPP protocol implementation.
>X */
>X
>X/*
>X * Send PPP control protocol packet.
>X */
>Xstatic void
>Xsppp_cp_send(struct sppp *sp, u_short proto, u_char type,
>X	     u_char ident, u_short len, void *data)
>X{
>X	STDDCL;
>X	struct ppp_header *h;
>X	struct lcp_header *lh;
>X	struct mbuf *m;
>X
>X	if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
>X		len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
>X	MGETHDR (m, M_DONTWAIT, MT_DATA);
>X	if (! m)
>X		return;
>X	m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
>X	m->m_pkthdr.rcvif = 0;
>X
>X	h = mtod (m, struct ppp_header*);
>X	h->address = PPP_ALLSTATIONS;        /* broadcast address */
>X	h->control = PPP_UI;                 /* Unnumbered Info */
>X	h->protocol = htons (proto);         /* Link Control Protocol */
>X
>X	lh = (struct lcp_header*) (h + 1);
>X	lh->type = type;
>X	lh->ident = ident;
>X	lh->len = htons (LCP_HEADER_LEN + len);
>X	if (len)
>X		bcopy (data, lh+1, len);
>X
>X	if (debug) {
>X		log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
>X		    SPP_ARGS(ifp),
>X		    sppp_proto_name(proto),
>X		    sppp_cp_type_name (lh->type), lh->ident,
>X		    ntohs (lh->len));
>X		if (len)
>X			sppp_print_bytes ((u_char*) (lh+1), len);
>X		addlog(">\n");
>X	}
>X	if (IF_QFULL (&sp->pp_cpq)) {
>X		IF_DROP (&sp->pp_fastq);
>X		IF_DROP (&ifp->if_snd);
>X		m_freem (m);
>X		++ifp->if_oerrors;
>X	} else
>X		IF_ENQUEUE (&sp->pp_cpq, m);
>X	if (! (ifp->if_flags & IFF_OACTIVE))
>X		(*ifp->if_start) (ifp);
>X	ifp->if_obytes += m->m_pkthdr.len + 3;
>X}
>X
>X/*
>X * Handle incoming PPP control protocol packets.
>X */
>Xstatic void
>Xsppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
>X{
>X	STDDCL;
>X	struct lcp_header *h;
>X	int len = m->m_pkthdr.len;
>X	int rv;
>X	u_char *p;
>X
>X	if (len < 4) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "%s invalid packet length: %d bytes\n",
>X			    SPP_ARGS(ifp), cp->name, len);
>X		return;
>X	}
>X	h = mtod (m, struct lcp_header*);
>X	if (debug) {
>X		log(LOG_DEBUG,
>X		    SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]),
>X		    sppp_cp_type_name (h->type), h->ident, ntohs (h->len));
>X		if (len > 4)
>X			sppp_print_bytes ((u_char*) (h+1), len-4);
>X		addlog(">\n");
>X	}
>X	if (len > ntohs (h->len))
>X		len = ntohs (h->len);
>X	p = (u_char *)(h + 1);
>X	switch (h->type) {
>X	case CONF_REQ:
>X		if (len < 4) {
>X			if (debug)
>X				addlog(SPP_FMT "%s invalid conf-req length %d\n",
>X				       SPP_ARGS(ifp), cp->name,
>X				       len);
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		/* handle states where RCR doesn't get a SCA/SCN */
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X			return;
>X		case STATE_CLOSED:
>X			sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
>X				     0, 0);
>X			return;
>X		}
>X		rv = (cp->RCR)(sp, h, len);
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			(cp->scr)(sp);
>X			/* fall through... */
>X		case STATE_ACK_SENT:
>X		case STATE_REQ_SENT:
>X			sppp_cp_change_state(cp, sp, rv?
>X					     STATE_ACK_SENT: STATE_REQ_SENT);
>X			break;
>X		case STATE_STOPPED:
>X			sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X			(cp->scr)(sp);
>X			sppp_cp_change_state(cp, sp, rv?
>X					     STATE_ACK_SENT: STATE_REQ_SENT);
>X			break;
>X		case STATE_ACK_RCVD:
>X			if (rv) {
>X				sppp_cp_change_state(cp, sp, STATE_OPENED);
>X				if (debug)
>X					log(LOG_DEBUG, SPP_FMT "%s tlu\n",
>X					    SPP_ARGS(ifp),
>X					    cp->name);
>X				(cp->tlu)(sp);
>X			} else
>X				sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case CONF_ACK:
>X		if (h->ident != sp->confid[cp->protoidx]) {
>X			if (debug)
>X				addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
>X				       SPP_ARGS(ifp), cp->name,
>X				       h->ident, sp->confid[cp->protoidx]);
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X			sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
>X			break;
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X			break;
>X		case STATE_REQ_SENT:
>X			sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X			sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
>X			break;
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			/* fall through */
>X		case STATE_ACK_RCVD:
>X			(cp->scr)(sp);
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			break;
>X		case STATE_ACK_SENT:
>X			sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X			sppp_cp_change_state(cp, sp, STATE_OPENED);
>X			if (debug)
>X				log(LOG_DEBUG, SPP_FMT "%s tlu\n",
>X				       SPP_ARGS(ifp), cp->name);
>X			(cp->tlu)(sp);
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case CONF_NAK:
>X	case CONF_REJ:
>X		if (h->ident != sp->confid[cp->protoidx]) {
>X			if (debug)
>X				addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
>X				       SPP_ARGS(ifp), cp->name,
>X				       h->ident, sp->confid[cp->protoidx]);
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		if (h->type == CONF_NAK)
>X			(cp->RCN_nak)(sp, h, len);
>X		else /* CONF_REJ */
>X			(cp->RCN_rej)(sp, h, len);
>X
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X			sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
>X			break;
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_SENT:
>X			sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X			(cp->scr)(sp);
>X			break;
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			/* fall through */
>X		case STATE_ACK_RCVD:
>X			sppp_cp_change_state(cp, sp, STATE_ACK_SENT);
>X			(cp->scr)(sp);
>X			break;
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X
>X	case TERM_REQ:
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_ACK_RCVD:
>X		case STATE_ACK_SENT:
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			/* fall through */
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X		case STATE_REQ_SENT:
>X		  sta:
>X			/* Send Terminate-Ack packet. */
>X			if (debug)
>X				log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
>X				    SPP_ARGS(ifp), cp->name);
>X			sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
>X			break;
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			sp->rst_counter[cp->protoidx] = 0;
>X			sppp_cp_change_state(cp, sp, STATE_STOPPING);
>X			goto sta;
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case TERM_ACK:
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_SENT:
>X			break;
>X		case STATE_CLOSING:
>X			sppp_cp_change_state(cp, sp, STATE_CLOSED);
>X			(cp->tlf)(sp);
>X			break;
>X		case STATE_STOPPING:
>X			sppp_cp_change_state(cp, sp, STATE_STOPPED);
>X			(cp->tlf)(sp);
>X			break;
>X		case STATE_ACK_RCVD:
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			break;
>X		case STATE_OPENED:
>X			(cp->tld)(sp);
>X			(cp->scr)(sp);
>X			sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case CODE_REJ:
>X	case PROTO_REJ:
>X		/* XXX catastrophic rejects (RXJ-) aren't handled yet. */
>X		log(LOG_INFO,
>X		    SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
>X		    "danger will robinson\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSED:
>X		case STATE_STOPPED:
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_SENT:
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X		case STATE_OPENED:
>X			break;
>X		case STATE_ACK_RCVD:
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			break;
>X		default:
>X			printf(SPP_FMT "%s illegal %s in state %s\n",
>X			       SPP_ARGS(ifp), cp->name,
>X			       sppp_cp_type_name(h->type),
>X			       sppp_state_name(sp->state[cp->protoidx]));
>X			++ifp->if_ierrors;
>X		}
>X		break;
>X	case DISC_REQ:
>X		if (cp->proto != PPP_LCP)
>X			goto illegal;
>X		/* Discard the packet. */
>X		break;
>X	case ECHO_REQ:
>X		if (cp->proto != PPP_LCP)
>X			goto illegal;
>X		if (sp->state[cp->protoidx] != STATE_OPENED) {
>X			if (debug)
>X				addlog(SPP_FMT "lcp echo req but lcp closed\n",
>X				       SPP_ARGS(ifp));
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		if (len < 8) {
>X			if (debug)
>X				addlog(SPP_FMT "invalid lcp echo request "
>X				       "packet length: %d bytes\n",
>X				       SPP_ARGS(ifp), len);
>X			break;
>X		}
>X		if (ntohl (*(long*)(h+1)) == sp->lcp.magic) {
>X			/* Line loopback mode detected. */
>X			printf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
>X			if_down (ifp);
>X			sppp_qflush (&sp->pp_cpq);
>X
>X			/* Shut down the PPP link. */
>X			/* XXX */
>X			lcp.Down(sp);
>X			lcp.Up(sp);
>X			break;
>X		}
>X		*(long*)(h+1) = htonl (sp->lcp.magic);
>X		if (debug)
>X			addlog(SPP_FMT "got lcp echo req, sending echo rep\n",
>X			       SPP_ARGS(ifp));
>X		sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
>X		break;
>X	case ECHO_REPLY:
>X		if (cp->proto != PPP_LCP)
>X			goto illegal;
>X		if (h->ident != sp->lcp.echoid) {
>X			++ifp->if_ierrors;
>X			break;
>X		}
>X		if (len < 8) {
>X			if (debug)
>X				addlog(SPP_FMT "lcp invalid echo reply "
>X				       "packet length: %d bytes\n",
>X				       SPP_ARGS(ifp), len);
>X			break;
>X		}
>X		if (debug)
>X			addlog(SPP_FMT "lcp got echo rep\n",
>X			       SPP_ARGS(ifp));
>X		if (ntohl (*(long*)(h+1)) != sp->lcp.magic)
>X			sp->pp_alivecnt = 0;
>X		break;
>X	default:
>X		/* Unknown packet type -- send Code-Reject packet. */
>X	  illegal:
>X		if (debug)
>X			addlog(SPP_FMT "%s send code-rej for 0x%x\n",
>X			       SPP_ARGS(ifp), cp->name, h->type);
>X		sppp_cp_send(sp, cp->proto, CODE_REJ, ++sp->pp_seq,
>X			     m->m_pkthdr.len, h);
>X		++ifp->if_ierrors;
>X	}
>X}
>X
>X
>X/*
>X * The generic part of all Up/Down/Open/Close/TO event handlers.
>X * Basically, the state transition handling in the automaton.
>X */
>Xstatic void
>Xsppp_up_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]));
>X
>X	switch (sp->state[cp->protoidx]) {
>X	case STATE_INITIAL:
>X		sppp_cp_change_state(cp, sp, STATE_CLOSED);
>X		break;
>X	case STATE_STARTING:
>X		sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X		(cp->scr)(sp);
>X		sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X		break;
>X	default:
>X		printf(SPP_FMT "%s illegal up in state %s\n",
>X		       SPP_ARGS(ifp), cp->name,
>X		       sppp_state_name(sp->state[cp->protoidx]));
>X	}
>X}
>X
>Xstatic void
>Xsppp_down_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]));
>X
>X	switch (sp->state[cp->protoidx]) {
>X	case STATE_CLOSED:
>X	case STATE_CLOSING:
>X		sppp_cp_change_state(cp, sp, STATE_INITIAL);
>X		break;
>X	case STATE_STOPPED:
>X		sppp_cp_change_state(cp, sp, STATE_STARTING);
>X		(cp->tls)(sp);
>X		break;
>X	case STATE_STOPPING:
>X	case STATE_REQ_SENT:
>X	case STATE_ACK_RCVD:
>X	case STATE_ACK_SENT:
>X		sppp_cp_change_state(cp, sp, STATE_STARTING);
>X		break;
>X	case STATE_OPENED:
>X		(cp->tld)(sp);
>X		sppp_cp_change_state(cp, sp, STATE_STARTING);
>X		break;
>X	default:
>X		printf(SPP_FMT "%s illegal down in state %s\n",
>X		       SPP_ARGS(ifp), cp->name,
>X		       sppp_state_name(sp->state[cp->protoidx]));
>X	}
>X}
>X
>X
>Xstatic void
>Xsppp_open_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]));
>X
>X	switch (sp->state[cp->protoidx]) {
>X	case STATE_INITIAL:
>X		sppp_cp_change_state(cp, sp, STATE_STARTING);
>X		(cp->tls)(sp);
>X		break;
>X	case STATE_STARTING:
>X		break;
>X	case STATE_CLOSED:
>X		sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
>X		(cp->scr)(sp);
>X		sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X		break;
>X	case STATE_STOPPED:
>X	case STATE_STOPPING:
>X	case STATE_REQ_SENT:
>X	case STATE_ACK_RCVD:
>X	case STATE_ACK_SENT:
>X	case STATE_OPENED:
>X		break;
>X	case STATE_CLOSING:
>X		sppp_cp_change_state(cp, sp, STATE_STOPPING);
>X		break;
>X	}
>X}
>X
>X
>Xstatic void
>Xsppp_close_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]));
>X
>X	switch (sp->state[cp->protoidx]) {
>X	case STATE_INITIAL:
>X	case STATE_CLOSED:
>X	case STATE_CLOSING:
>X		break;
>X	case STATE_STARTING:
>X		sppp_cp_change_state(cp, sp, STATE_INITIAL);
>X		(cp->tlf)(sp);
>X		break;
>X	case STATE_STOPPED:
>X		sppp_cp_change_state(cp, sp, STATE_CLOSED);
>X		break;
>X	case STATE_STOPPING:
>X		sppp_cp_change_state(cp, sp, STATE_CLOSING);
>X		break;
>X	case STATE_OPENED:
>X		(cp->tld)(sp);
>X		/* fall through */
>X	case STATE_REQ_SENT:
>X	case STATE_ACK_RCVD:
>X	case STATE_ACK_SENT:
>X		sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
>X		sppp_cp_send(sp, cp->proto, TERM_REQ, ++sp->pp_seq, 0, 0);
>X		sppp_cp_change_state(cp, sp, STATE_CLOSING);
>X		break;
>X	}
>X}
>X
>Xstatic void
>Xsppp_to_event(const struct cp *cp, struct sppp *sp)
>X{
>X	STDDCL;
>X	int s;
>X
>X	s = splimp();
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_state_name(sp->state[cp->protoidx]),
>X		    sp->rst_counter[cp->protoidx]);
>X
>X	if (--sp->rst_counter[cp->protoidx] < 0)
>X		/* TO- event */
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSING:
>X			sppp_cp_change_state(cp, sp, STATE_CLOSED);
>X			(cp->tlf)(sp);
>X			break;
>X		case STATE_STOPPING:
>X			sppp_cp_change_state(cp, sp, STATE_STOPPED);
>X			(cp->tlf)(sp);
>X			break;
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_RCVD:
>X		case STATE_ACK_SENT:
>X			sppp_cp_change_state(cp, sp, STATE_STOPPED);
>X			(cp->tlf)(sp);
>X			break;
>X		}
>X	else
>X		/* TO+ event */
>X		switch (sp->state[cp->protoidx]) {
>X		case STATE_CLOSING:
>X		case STATE_STOPPING:
>X			sppp_cp_send(sp, cp->proto, TERM_REQ, ++sp->pp_seq,
>X				     0, 0);
>X			TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout, 
>X			    sp->ch[cp->protoidx]);
>X			break;
>X		case STATE_REQ_SENT:
>X		case STATE_ACK_RCVD:
>X			(cp->scr)(sp);
>X			/* sppp_cp_change_state() will restart the timer */
>X			sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
>X			break;
>X		case STATE_ACK_SENT:
>X			(cp->scr)(sp);
>X			TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout,
>X			    sp->ch[cp->protoidx]);
>X			break;
>X		}
>X
>X	splx(s);
>X}
>X
>X/*
>X * Change the state of a control protocol in the state automaton.
>X * Takes care of starting/stopping the restart timer.
>X */
>Xvoid
>Xsppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
>X{
>X	sp->state[cp->protoidx] = newstate;
>X
>X	UNTIMEOUT(cp->TO, (void *)sp, sp->ch[cp->protoidx]);
>X	switch (newstate) {
>X	case STATE_INITIAL:
>X	case STATE_STARTING:
>X	case STATE_CLOSED:
>X	case STATE_STOPPED:
>X	case STATE_OPENED:
>X		break;
>X	case STATE_CLOSING:
>X	case STATE_STOPPING:
>X	case STATE_REQ_SENT:
>X	case STATE_ACK_RCVD:
>X	case STATE_ACK_SENT:
>X		TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout, 
>X		    sp->ch[cp->protoidx]);
>X		break;
>X	}
>X}
>X/*
>X *--------------------------------------------------------------------------*
>X *                                                                          *
>X *                         The LCP implementation.                          *
>X *                                                                          *
>X *--------------------------------------------------------------------------*
>X */
>Xstatic void
>Xsppp_lcp_init(struct sppp *sp)
>X{
>X	sp->lcp.opts = (1 << LCP_OPT_MAGIC);
>X	sp->lcp.magic = 0;
>X	sp->state[IDX_LCP] = STATE_INITIAL;
>X	sp->fail_counter[IDX_LCP] = 0;
>X	sp->lcp.protos = 0;
>X	sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
>X
>X	/*
>X	 * Initialize counters and timeout values.  Note that we don't
>X	 * use the 3 seconds suggested in RFC 1661 since we are likely
>X	 * running on a fast link.  XXX We should probably implement
>X	 * the exponential backoff option.  Note that these values are
>X	 * relevant for all control protocols, not just LCP only.
>X	 */
>X	sp->lcp.timeout = 1 * hz;
>X	sp->lcp.max_terminate = 2;
>X	sp->lcp.max_configure = 10;
>X	sp->lcp.max_failure = 10;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	callout_handle_init(&sp->ch[IDX_LCP]);
>X#endif
>X}
>X
>Xstatic void
>Xsppp_lcp_up(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	/*
>X	 * If this interface is passive or dial-on-demand, and we are
>X	 * still in Initial state, it means we've got an incoming
>X	 * call.  Activate the interface.
>X	 */
>X	if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "Up event", SPP_ARGS(ifp));
>X		ifp->if_flags |= IFF_RUNNING;
>X		if (sp->state[IDX_LCP] == STATE_INITIAL) {
>X			if (debug)
>X				addlog("(incoming call)\n");
>X			sp->pp_flags |= PP_CALLIN;
>X			lcp.Open(sp);
>X		} else if (debug)
>X			addlog("\n");
>X	}
>X
>X	sppp_up_event(&lcp, sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_down(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	sppp_down_event(&lcp, sp);
>X
>X	/*
>X	 * If this is neither a dial-on-demand nor a passive
>X	 * interface, simulate an ``ifconfig down'' action, so the
>X	 * administrator can force a redial by another ``ifconfig
>X	 * up''.  XXX For leased line operation, should we immediately
>X	 * try to reopen the connection here?
>X	 */
>X	if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
>X		log(LOG_INFO,
>X		    SPP_FMT "Down event, taking interface down.\n",
>X		    SPP_ARGS(ifp));
>X		if_down(ifp);
>X	} else {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "Down event (carrier loss)\n",
>X			    SPP_ARGS(ifp));
>X	}
>X	sp->pp_flags &= ~PP_CALLIN;
>X	if (sp->state[IDX_LCP] != STATE_INITIAL)
>X		lcp.Close(sp);
>X	ifp->if_flags &= ~IFF_RUNNING;
>X}
>X
>Xstatic void
>Xsppp_lcp_open(struct sppp *sp)
>X{
>X	/*
>X	 * If we are authenticator, negotiate LCP_AUTH
>X	 */
>X	if (sp->hisauth.proto != 0)
>X		sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
>X	else
>X		sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
>X	sp->pp_flags &= ~PP_NEEDAUTH;
>X	sppp_open_event(&lcp, sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_close(struct sppp *sp)
>X{
>X	sppp_close_event(&lcp, sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_TO(void *cookie)
>X{
>X	sppp_to_event(&lcp, (struct sppp *)cookie);
>X}
>X
>X/*
>X * Analyze a configure request.  Return true if it was agreeable, and
>X * caused action sca, false if it has been rejected or nak'ed, and
>X * caused action scn.  (The return value is used to make the state
>X * transition decision in the state automaton.)
>X */
>Xstatic int
>Xsppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	STDDCL;
>X	u_char *buf, *r, *p;
>X	int origlen, rlen;
>X	u_long nmagic;
>X	u_short authproto;
>X
>X	len -= 4;
>X	origlen = len;
>X	buf = r = malloc (len, M_TEMP, M_NOWAIT);
>X	if (! buf)
>X		return (0);
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	/* pass 1: check for things that need to be rejected */
>X	p = (void*) (h+1);
>X	for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_lcp_opt_name(*p));
>X		switch (*p) {
>X		case LCP_OPT_MAGIC:
>X			/* Magic number. */
>X			/* fall through, both are same length */
>X		case LCP_OPT_ASYNC_MAP:
>X			/* Async control character map. */
>X			if (len >= 6 || p[1] == 6)
>X				continue;
>X			if (debug)
>X				addlog("[invalid] ");
>X			break;
>X		case LCP_OPT_MRU:
>X			/* Maximum receive unit. */
>X			if (len >= 4 && p[1] == 4)
>X				continue;
>X			if (debug)
>X				addlog("[invalid] ");
>X			break;
>X		case LCP_OPT_AUTH_PROTO:
>X			if (len < 4) {
>X				if (debug)
>X					addlog("[invalid] ");
>X				break;
>X			}
>X			authproto = (p[2] << 8) + p[3];
>X			if (authproto == PPP_CHAP && p[1] != 5) {
>X				if (debug)
>X					addlog("[invalid chap len] ");
>X				break;
>X			}
>X			if (sp->myauth.proto == 0) {
>X				/* we are not configured to do auth */
>X				if (debug)
>X					addlog("[not configured] ");
>X				break;
>X			}
>X			/*
>X			 * Remote want us to authenticate, remember this,
>X			 * so we stay in PHASE_AUTHENTICATE after LCP got
>X			 * up.
>X			 */
>X			sp->pp_flags |= PP_NEEDAUTH;
>X			continue;
>X		default:
>X			/* Others not supported. */
>X			if (debug)
>X				addlog("[rej] ");
>X			break;
>X		}
>X		/* Add the option to rejected list. */
>X		bcopy (p, r, p[1]);
>X		r += p[1];
>X		rlen += p[1];
>X	}
>X	if (rlen) {
>X		if (debug)
>X			addlog(" send conf-rej\n");
>X		sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
>X		return 0;
>X	} else if (debug)
>X		addlog("\n");
>X
>X	/*
>X	 * pass 2: check for option values that are unacceptable and
>X	 * thus require to be nak'ed.
>X	 */
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	len = origlen;
>X	for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_lcp_opt_name(*p));
>X		switch (*p) {
>X		case LCP_OPT_MAGIC:
>X			/* Magic number -- extract. */
>X			nmagic = (u_long)p[2] << 24 |
>X				(u_long)p[3] << 16 | p[4] << 8 | p[5];
>X			if (nmagic != sp->lcp.magic) {
>X				if (debug)
>X					addlog("0x%lx ", nmagic);
>X				continue;
>X			}
>X			/*
>X			 * Local and remote magics equal -- loopback?
>X			 */
>X			if (sp->pp_loopcnt >= MAXALIVECNT*5) {
>X				printf (SPP_FMT "loopback\n",
>X					SPP_ARGS(ifp));
>X				sp->pp_loopcnt = 0;
>X				if (ifp->if_flags & IFF_UP) {
>X					if_down(ifp);
>X					sppp_qflush(&sp->pp_cpq);
>X					/* XXX ? */
>X					lcp.Down(sp);
>X					lcp.Up(sp);
>X				}
>X			} else if (debug)
>X				addlog("[glitch] ");
>X			++sp->pp_loopcnt;
>X			/*
>X			 * We negate our magic here, and NAK it.  If
>X			 * we see it later in an NAK packet, we
>X			 * suggest a new one.
>X			 */
>X			nmagic = ~sp->lcp.magic;
>X			/* Gonna NAK it. */
>X			p[2] = nmagic >> 24;
>X			p[3] = nmagic >> 16;
>X			p[4] = nmagic >> 8;
>X			p[5] = nmagic;
>X			break;
>X
>X		case LCP_OPT_ASYNC_MAP:
>X			/* Async control character map -- check to be zero. */
>X			if (! p[2] && ! p[3] && ! p[4] && ! p[5]) {
>X				if (debug)
>X					addlog("[empty] ");
>X				continue;
>X			}
>X			if (debug)
>X				addlog("[non-empty] ");
>X			/* suggest a zero one */
>X			p[2] = p[3] = p[4] = p[5] = 0;
>X			break;
>X
>X		case LCP_OPT_MRU:
>X			/*
>X			 * Maximum receive unit.  Always agreeable,
>X			 * but ignored by now.
>X			 */
>X			sp->lcp.their_mru = p[2] * 256 + p[3];
>X			if (debug)
>X				addlog("%lu ", sp->lcp.their_mru);
>X			continue;
>X
>X		case LCP_OPT_AUTH_PROTO:
>X			authproto = (p[2] << 8) + p[3];
>X			if (sp->myauth.proto != authproto) {
>X				/* not agreed, nak */
>X				if (debug)
>X					addlog("[mine %s != his %s] ",
>X					       sppp_proto_name(sp->hisauth.proto),
>X					       sppp_proto_name(authproto));
>X				p[2] = sp->myauth.proto >> 8;
>X				p[3] = sp->myauth.proto;
>X				break;
>X			}
>X			if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
>X				if (debug)
>X					addlog("[chap not MD5] ");
>X				p[4] = CHAP_MD5;
>X				break;
>X			}
>X			continue;
>X		}
>X		/* Add the option to nak'ed list. */
>X		bcopy (p, r, p[1]);
>X		r += p[1];
>X		rlen += p[1];
>X	}
>X	if (rlen) {
>X		if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
>X			if (debug)
>X				addlog(" max_failure (%d) exceeded, "
>X				       "send conf-rej\n",
>X				       sp->lcp.max_failure);
>X			sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
>X		} else {
>X			if (debug)
>X				addlog(" send conf-nak\n");
>X			sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
>X		}
>X		return 0;
>X	} else {
>X		if (debug)
>X			addlog(" send conf-ack\n");
>X		sp->fail_counter[IDX_LCP] = 0;
>X		sp->pp_loopcnt = 0;
>X		sppp_cp_send (sp, PPP_LCP, CONF_ACK,
>X			      h->ident, origlen, h+1);
>X	}
>X
>X	free (buf, M_TEMP);
>X	return (rlen == 0);
>X}
>X
>X/*
>X * Analyze the LCP Configure-Reject option list, and adjust our
>X * negotiation.
>X */
>Xstatic void
>Xsppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	STDDCL;
>X	u_char *buf, *p;
>X
>X	len -= 4;
>X	buf = malloc (len, M_TEMP, M_NOWAIT);
>X	if (!buf)
>X		return;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_lcp_opt_name(*p));
>X		switch (*p) {
>X		case LCP_OPT_MAGIC:
>X			/* Magic number -- can't use it, use 0 */
>X			sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
>X			sp->lcp.magic = 0;
>X			break;
>X		case LCP_OPT_MRU:
>X			/*
>X			 * Should not be rejected anyway, since we only
>X			 * negotiate a MRU if explicitly requested by
>X			 * peer.
>X			 */
>X			sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
>X			break;
>X		case LCP_OPT_AUTH_PROTO:
>X			/*
>X			 * Peer doesn't want to authenticate himself,
>X			 * deny unless this is a dialout call, and
>X			 * AUTHFLAG_NOCALLOUT is set.
>X			 */
>X			if ((sp->pp_flags & PP_CALLIN) == 0 &&
>X			    (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
>X				if (debug)
>X					addlog("[don't insist on auth "
>X					       "for callout]");
>X				sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
>X				break;
>X			}
>X			if (debug)
>X				addlog("[access denied]\n");
>X			lcp.Close(sp);
>X			break;
>X		}
>X	}
>X	if (debug)
>X		addlog("\n");
>X	free (buf, M_TEMP);
>X	return;
>X}
>X
>X/*
>X * Analyze the LCP Configure-NAK option list, and adjust our
>X * negotiation.
>X */
>Xstatic void
>Xsppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	STDDCL;
>X	u_char *buf, *p;
>X	u_long magic;
>X
>X	len -= 4;
>X	buf = malloc (len, M_TEMP, M_NOWAIT);
>X	if (!buf)
>X		return;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_lcp_opt_name(*p));
>X		switch (*p) {
>X		case LCP_OPT_MAGIC:
>X			/* Magic number -- renegotiate */
>X			if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
>X			    len >= 6 && p[1] == 6) {
>X				magic = (u_long)p[2] << 24 |
>X					(u_long)p[3] << 16 | p[4] << 8 | p[5];
>X				/*
>X				 * If the remote magic is our negated one,
>X				 * this looks like a loopback problem.
>X				 * Suggest a new magic to make sure.
>X				 */
>X				if (magic == ~sp->lcp.magic) {
>X					if (debug)
>X						addlog("magic glitch ");
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X					sp->lcp.magic = random();
>X#else
>X					sp->lcp.magic = time.tv_sec + time.tv_usec;
>X#endif
>X				} else {
>X					sp->lcp.magic = magic;
>X					if (debug)
>X						addlog("%lu ", magic);
>X				}
>X			}
>X			break;
>X		case LCP_OPT_MRU:
>X			/*
>X			 * Peer wants to advise us to negotiate an MRU.
>X			 * Agree on it if it's reasonable, or use
>X			 * default otherwise.
>X			 */
>X			if (len >= 4 && p[1] == 4) {
>X				u_int mru = p[2] * 256 + p[3];
>X				if (debug)
>X					addlog("%d ", mru);
>X				if (mru < PP_MTU || mru > PP_MAX_MRU)
>X					mru = PP_MTU;
>X				sp->lcp.mru = mru;
>X				sp->lcp.opts |= (1 << LCP_OPT_MRU);
>X			}
>X			break;
>X		case LCP_OPT_AUTH_PROTO:
>X			/*
>X			 * Peer doesn't like our authentication method,
>X			 * deny.
>X			 */
>X			if (debug)
>X				addlog("[access denied]\n");
>X			lcp.Close(sp);
>X			break;
>X		}
>X	}
>X	if (debug)
>X		addlog("\n");
>X	free (buf, M_TEMP);
>X	return;
>X}
>X
>Xstatic void
>Xsppp_lcp_tlu(struct sppp *sp)
>X{
>X	STDDCL;
>X	int i;
>X	u_long mask;
>X
>X	/* XXX ? */
>X	if (! (ifp->if_flags & IFF_UP) &&
>X	    (ifp->if_flags & IFF_RUNNING)) {
>X		/* Coming out of loopback mode. */
>X		if_up(ifp);
>X		printf (SPP_FMT "up\n", SPP_ARGS(ifp));
>X	}
>X
>X	for (i = 0; i < IDX_COUNT; i++)
>X		if ((cps[i])->flags & CP_QUAL)
>X			(cps[i])->Open(sp);
>X
>X	if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
>X	    (sp->pp_flags & PP_NEEDAUTH) != 0)
>X		sp->pp_phase = PHASE_AUTHENTICATE;
>X	else
>X		sp->pp_phase = PHASE_NETWORK;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/*
>X	 * Open all authentication protocols.  This is even required
>X	 * if we already proceeded to network phase, since it might be
>X	 * that remote wants us to authenticate, so we might have to
>X	 * send a PAP request.  Undesired authentication protocols
>X	 * don't do anything when they get an Open event.
>X	 */
>X	for (i = 0; i < IDX_COUNT; i++)
>X		if ((cps[i])->flags & CP_AUTH)
>X			(cps[i])->Open(sp);
>X
>X	if (sp->pp_phase == PHASE_NETWORK) {
>X		/* Notify all NCPs. */
>X		for (i = 0; i < IDX_COUNT; i++)
>X			if ((cps[i])->flags & CP_NCP)
>X				(cps[i])->Open(sp);
>X	}
>X
>X	/* Send Up events to all started protos. */
>X	for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
>X		if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0)
>X			(cps[i])->Up(sp);
>X
>X	/* notify low-level driver of state change */
>X	if (sp->pp_chg)
>X		sp->pp_chg(sp, (int)sp->pp_phase);
>X	
>X	if (sp->pp_phase == PHASE_NETWORK)
>X		/* if no NCP is starting, close down */
>X		sppp_lcp_check_and_close(sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_tld(struct sppp *sp)
>X{
>X	STDDCL;
>X	int i;
>X	u_long mask;
>X
>X	sp->pp_phase = PHASE_TERMINATE;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/*
>X	 * Take upper layers down.  We send the Down event first and
>X	 * the Close second to prevent the upper layers from sending
>X	 * ``a flurry of terminate-request packets'', as the RFC
>X	 * describes it.
>X	 */
>X	for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
>X		if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) {
>X			(cps[i])->Down(sp);
>X			(cps[i])->Close(sp);
>X		}
>X}
>X
>Xstatic void
>Xsppp_lcp_tls(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	sp->pp_phase = PHASE_ESTABLISH;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/* Notify lower layer if desired. */
>X	if (sp->pp_tls)
>X		(sp->pp_tls)(sp);
>X	else
>X		(sp->pp_up)(sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_tlf(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	sp->pp_phase = PHASE_DEAD;
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/* Notify lower layer if desired. */
>X	if (sp->pp_tlf)
>X		(sp->pp_tlf)(sp);
>X	else
>X		(sp->pp_down)(sp);
>X}
>X
>Xstatic void
>Xsppp_lcp_scr(struct sppp *sp)
>X{
>X	char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
>X	int i = 0;
>X	u_short authproto;
>X
>X	if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
>X		if (! sp->lcp.magic)
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X			sp->lcp.magic = random();
>X#else
>X			sp->lcp.magic = time.tv_sec + time.tv_usec;
>X#endif
>X		opt[i++] = LCP_OPT_MAGIC;
>X		opt[i++] = 6;
>X		opt[i++] = sp->lcp.magic >> 24;
>X		opt[i++] = sp->lcp.magic >> 16;
>X		opt[i++] = sp->lcp.magic >> 8;
>X		opt[i++] = sp->lcp.magic;
>X	}
>X
>X	if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
>X		opt[i++] = LCP_OPT_MRU;
>X		opt[i++] = 4;
>X		opt[i++] = sp->lcp.mru >> 8;
>X		opt[i++] = sp->lcp.mru;
>X	}
>X
>X	if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
>X		authproto = sp->hisauth.proto;
>X		opt[i++] = LCP_OPT_AUTH_PROTO;
>X		opt[i++] = authproto == PPP_CHAP? 5: 4;
>X		opt[i++] = authproto >> 8;
>X		opt[i++] = authproto;
>X		if (authproto == PPP_CHAP)
>X			opt[i++] = CHAP_MD5;
>X	}
>X
>X	sp->confid[IDX_LCP] = ++sp->pp_seq;
>X	sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
>X}
>X
>X/*
>X * Check the open NCPs, return true if at least one NCP is open.
>X */
>Xstatic int
>Xsppp_ncp_check(struct sppp *sp)
>X{
>X	int i, mask;
>X
>X	for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
>X		if (sp->lcp.protos & mask && (cps[i])->flags & CP_NCP)
>X			return 1;
>X	return 0;
>X}
>X
>X/*
>X * Re-check the open NCPs and see if we should terminate the link.
>X * Called by the NCPs during their tlf action handling.
>X */
>Xstatic void
>Xsppp_lcp_check_and_close(struct sppp *sp)
>X{
>X
>X	if (sp->pp_phase < PHASE_NETWORK)
>X		/* don't bother, we are already going down */
>X		return;
>X
>X	if (sppp_ncp_check(sp))
>X		return;
>X
>X	lcp.Close(sp);
>X}
>X/*
>X *--------------------------------------------------------------------------*
>X *                                                                          *
>X *                        The IPCP implementation.                          *
>X *                                                                          *
>X *--------------------------------------------------------------------------*
>X */
>X
>Xstatic void
>Xsppp_ipcp_init(struct sppp *sp)
>X{
>X	sp->ipcp.opts = 0;
>X	sp->ipcp.flags = 0;
>X	sp->state[IDX_IPCP] = STATE_INITIAL;
>X	sp->fail_counter[IDX_IPCP] = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	callout_handle_init(&sp->ch[IDX_IPCP]);
>X#endif
>X}
>X
>Xstatic void
>Xsppp_ipcp_up(struct sppp *sp)
>X{
>X	sppp_up_event(&ipcp, sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_down(struct sppp *sp)
>X{
>X	sppp_down_event(&ipcp, sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_open(struct sppp *sp)
>X{
>X	STDDCL;
>X	u_long myaddr, hisaddr;
>X
>X	sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN);
>X
>X	sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
>X	/*
>X	 * If we don't have his address, this probably means our
>X	 * interface doesn't want to talk IP at all.  (This could
>X	 * be the case if somebody wants to speak only IPX, for
>X	 * example.)  Don't open IPCP in this case.
>X	 */
>X	if (hisaddr == 0L) {
>X		/* XXX this message should go away */
>X		if (debug)
>X			log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
>X			    SPP_ARGS(ifp));
>X		return;
>X	}
>X
>X	if (myaddr == 0L) {
>X		/*
>X		 * I don't have an assigned address, so i need to
>X		 * negotiate my address.
>X		 */
>X		sp->ipcp.flags |= IPCP_MYADDR_DYN;
>X		sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
>X	} else
>X		sp->ipcp.flags |= IPCP_MYADDR_SEEN;
>X	sppp_open_event(&ipcp, sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_close(struct sppp *sp)
>X{
>X	sppp_close_event(&ipcp, sp);
>X	if (sp->ipcp.flags & IPCP_MYADDR_DYN)
>X		/*
>X		 * My address was dynamic, clear it again.
>X		 */
>X		sppp_set_ip_addr(sp, 0L);
>X}
>X
>Xstatic void
>Xsppp_ipcp_TO(void *cookie)
>X{
>X	sppp_to_event(&ipcp, (struct sppp *)cookie);
>X}
>X
>X/*
>X * Analyze a configure request.  Return true if it was agreeable, and
>X * caused action sca, false if it has been rejected or nak'ed, and
>X * caused action scn.  (The return value is used to make the state
>X * transition decision in the state automaton.)
>X */
>Xstatic int
>Xsppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	u_char *buf, *r, *p;
>X	struct ifnet *ifp = &sp->pp_if;
>X	int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
>X	u_long hisaddr, desiredaddr;
>X	int gotmyaddr = 0;
>X
>X	len -= 4;
>X	origlen = len;
>X	/*
>X	 * Make sure to allocate a buf that can at least hold a
>X	 * conf-nak with an `address' option.  We might need it below.
>X	 */
>X	buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
>X	if (! buf)
>X		return (0);
>X
>X	/* pass 1: see if we can recognize them */
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
>X		    SPP_ARGS(ifp));
>X	p = (void*) (h+1);
>X	for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_ipcp_opt_name(*p));
>X		switch (*p) {
>X#ifdef notyet
>X		case IPCP_OPT_COMPRESSION:
>X			if (len >= 6 && p[1] >= 6) {
>X				/* correctly formed compress option */
>X				continue;
>X			}
>X			if (debug)
>X				addlog("[invalid] ");
>X			break;
>X#endif
>X		case IPCP_OPT_ADDRESS:
>X			if (len >= 6 && p[1] == 6) {
>X				/* correctly formed address option */
>X				continue;
>X			}
>X			if (debug)
>X				addlog("[invalid] ");
>X			break;
>X		default:
>X			/* Others not supported. */
>X			if (debug)
>X				addlog("[rej] ");
>X			break;
>X		}
>X		/* Add the option to rejected list. */
>X		bcopy (p, r, p[1]);
>X		r += p[1];
>X		rlen += p[1];
>X	}
>X	if (rlen) {
>X		if (debug)
>X			addlog(" send conf-rej\n");
>X		sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
>X		return 0;
>X	} else if (debug)
>X		addlog("\n");
>X
>X	/* pass 2: parse option values */
>X	sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
>X		       SPP_ARGS(ifp));
>X	p = (void*) (h+1);
>X	len = origlen;
>X	for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_ipcp_opt_name(*p));
>X		switch (*p) {
>X#ifdef notyet
>X		case IPCP_OPT_COMPRESSION:
>X			continue;
>X#endif
>X		case IPCP_OPT_ADDRESS:
>X			/* This is the address he wants in his end */
>X			desiredaddr = p[2] << 24 | p[3] << 16 |
>X				p[4] << 8 | p[5];
>X			if (desiredaddr == hisaddr ||
>X			    (hisaddr == 1 && desiredaddr != 0)) {
>X				/*
>X				 * Peer's address is same as our value,
>X				 * or we have set it to 0.0.0.1 to 
>X				 * indicate that we do not really care,
>X				 * this is agreeable.  Gonna conf-ack
>X				 * it.
>X				 */
>X				if (debug)
>X					addlog("%s [ack] ",
>X						sppp_dotted_quad(hisaddr));
>X				/* record that we've seen it already */
>X				sp->ipcp.flags |= IPCP_HISADDR_SEEN;
>X				continue;
>X			}
>X			/*
>X			 * The address wasn't agreeable.  This is either
>X			 * he sent us 0.0.0.0, asking to assign him an
>X			 * address, or he send us another address not
>X			 * matching our value.  Either case, we gonna
>X			 * conf-nak it with our value.
>X			 * XXX: we should "rej" if hisaddr == 0
>X			 */
>X			if (debug) {
>X				if (desiredaddr == 0)
>X					addlog("[addr requested] ");
>X				else
>X					addlog("%s [not agreed] ",
>X						sppp_dotted_quad(desiredaddr));
>X
>X				p[2] = hisaddr >> 24;
>X				p[3] = hisaddr >> 16;
>X				p[4] = hisaddr >> 8;
>X				p[5] = hisaddr;
>X			}
>X			break;
>X		}
>X		/* Add the option to nak'ed list. */
>X		bcopy (p, r, p[1]);
>X		r += p[1];
>X		rlen += p[1];
>X	}
>X
>X	/*
>X	 * If we are about to conf-ack the request, but haven't seen
>X	 * his address so far, gonna conf-nak it instead, with the
>X	 * `address' option present and our idea of his address being
>X	 * filled in there, to request negotiation of both addresses.
>X	 *
>X	 * XXX This can result in an endless req - nak loop if peer
>X	 * doesn't want to send us his address.  Q: What should we do
>X	 * about it?  XXX  A: implement the max-failure counter.
>X	 */
>X	if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
>X		buf[0] = IPCP_OPT_ADDRESS;
>X		buf[1] = 6;
>X		buf[2] = hisaddr >> 24;
>X		buf[3] = hisaddr >> 16;
>X		buf[4] = hisaddr >> 8;
>X		buf[5] = hisaddr;
>X		rlen = 6;
>X		if (debug)
>X			addlog("still need hisaddr ");
>X	}
>X
>X	if (rlen) {
>X		if (debug)
>X			addlog(" send conf-nak\n");
>X		sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
>X	} else {
>X		if (debug)
>X			addlog(" send conf-ack\n");
>X		sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
>X			      h->ident, origlen, h+1);
>X	}
>X
>X	free (buf, M_TEMP);
>X	return (rlen == 0);
>X}
>X
>X/*
>X * Analyze the IPCP Configure-Reject option list, and adjust our
>X * negotiation.
>X */
>Xstatic void
>Xsppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	u_char *buf, *p;
>X	struct ifnet *ifp = &sp->pp_if;
>X	int debug = ifp->if_flags & IFF_DEBUG;
>X
>X	len -= 4;
>X	buf = malloc (len, M_TEMP, M_NOWAIT);
>X	if (!buf)
>X		return;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_ipcp_opt_name(*p));
>X		switch (*p) {
>X		case IPCP_OPT_ADDRESS:
>X			/*
>X			 * Peer doesn't grok address option.  This is
>X			 * bad.  XXX  Should we better give up here?
>X			 * XXX We could try old "addresses" option...
>X			 */
>X			sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
>X			break;
>X#ifdef notyet
>X		case IPCP_OPT_COMPRESS:
>X			sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS);
>X			break;
>X#endif
>X		}
>X	}
>X	if (debug)
>X		addlog("\n");
>X	free (buf, M_TEMP);
>X	return;
>X}
>X
>X/*
>X * Analyze the IPCP Configure-NAK option list, and adjust our
>X * negotiation.
>X */
>Xstatic void
>Xsppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
>X{
>X	u_char *buf, *p;
>X	struct ifnet *ifp = &sp->pp_if;
>X	int debug = ifp->if_flags & IFF_DEBUG;
>X	u_long wantaddr;
>X
>X	len -= 4;
>X	buf = malloc (len, M_TEMP, M_NOWAIT);
>X	if (!buf)
>X		return;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
>X		    SPP_ARGS(ifp));
>X
>X	p = (void*) (h+1);
>X	for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
>X		if (debug)
>X			addlog(" %s ", sppp_ipcp_opt_name(*p));
>X		switch (*p) {
>X		case IPCP_OPT_ADDRESS:
>X			/*
>X			 * Peer doesn't like our local IP address.  See
>X			 * if we can do something for him.  We'll drop
>X			 * him our address then.
>X			 */
>X			if (len >= 6 && p[1] == 6) {
>X				wantaddr = p[2] << 24 | p[3] << 16 |
>X					p[4] << 8 | p[5];
>X				sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
>X				if (debug)
>X					addlog("[wantaddr %s] ",
>X					       sppp_dotted_quad(wantaddr));
>X				/*
>X				 * When doing dynamic address assignment,
>X				 * we accept his offer.  Otherwise, we
>X				 * ignore it and thus continue to negotiate
>X				 * our already existing value.
>X			 	 * XXX: Bogus, if he said no once, he'll
>X				 * just say no again, might as well die.
>X				 */
>X				if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
>X					sppp_set_ip_addr(sp, wantaddr);
>X					if (debug)
>X						addlog("[agree] ");
>X					sp->ipcp.flags |= IPCP_MYADDR_SEEN;
>X				}
>X			}
>X			break;
>X#ifdef notyet
>X		case IPCP_OPT_COMPRESS:
>X			/*
>X			 * Peer wants different compression parameters.
>X			 */
>X			break;
>X#endif
>X		}
>X	}
>X	if (debug)
>X		addlog("\n");
>X	free (buf, M_TEMP);
>X	return;
>X}
>X
>Xstatic void
>Xsppp_ipcp_tlu(struct sppp *sp)
>X{
>X	/* we are up - notify isdn daemon */
>X	if (sp->pp_con)
>X		sp->pp_con(sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_tld(struct sppp *sp)
>X{
>X}
>X
>Xstatic void
>Xsppp_ipcp_tls(struct sppp *sp)
>X{
>X	/* indicate to LCP that it must stay alive */
>X	sp->lcp.protos |= (1 << IDX_IPCP);
>X}
>X
>Xstatic void
>Xsppp_ipcp_tlf(struct sppp *sp)
>X{
>X	/* we no longer need LCP */
>X	sp->lcp.protos &= ~(1 << IDX_IPCP);
>X	sppp_lcp_check_and_close(sp);
>X}
>X
>Xstatic void
>Xsppp_ipcp_scr(struct sppp *sp)
>X{
>X	char opt[6 /* compression */ + 6 /* address */];
>X	u_long ouraddr;
>X	int i = 0;
>X
>X#ifdef notyet
>X	if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
>X		opt[i++] = IPCP_OPT_COMPRESSION;
>X		opt[i++] = 6;
>X		opt[i++] = 0;	/* VJ header compression */
>X		opt[i++] = 0x2d; /* VJ header compression */
>X		opt[i++] = max_slot_id;
>X		opt[i++] = comp_slot_id;
>X	}
>X#endif
>X
>X	if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
>X		sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
>X		opt[i++] = IPCP_OPT_ADDRESS;
>X		opt[i++] = 6;
>X		opt[i++] = ouraddr >> 24;
>X		opt[i++] = ouraddr >> 16;
>X		opt[i++] = ouraddr >> 8;
>X		opt[i++] = ouraddr;
>X	}
>X
>X	sp->confid[IDX_IPCP] = ++sp->pp_seq;
>X	sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
>X}
>X
>X
>X/*
>X *--------------------------------------------------------------------------*
>X *                                                                          *
>X *                        The CHAP implementation.                          *
>X *                                                                          *
>X *--------------------------------------------------------------------------*
>X */
>X
>X/*
>X * The authentication protocols don't employ a full-fledged state machine as
>X * the control protocols do, since they do have Open and Close events, but
>X * not Up and Down, nor are they explicitly terminated.  Also, use of the
>X * authentication protocols may be different in both directions (this makes
>X * sense, think of a machine that never accepts incoming calls but only
>X * calls out, it doesn't require the called party to authenticate itself).
>X *
>X * Our state machine for the local authentication protocol (we are requesting
>X * the peer to authenticate) looks like:
>X *
>X *						    RCA-
>X *	      +--------------------------------------------+
>X *	      V					    scn,tld|
>X *	  +--------+			       Close   +---------+ RCA+
>X *	  |	   |<----------------------------------|	 |------+
>X *   +--->| Closed |				TO*    | Opened	 | sca	|
>X *   |	  |	   |-----+		       +-------|	 |<-----+
>X *   |	  +--------+ irc |		       |       +---------+
>X *   |	    ^		 |		       |	   ^
>X *   |	    |		 |		       |	   |
>X *   |	    |		 |		       |	   |
>X *   |	 TO-|		 |		       |	   |
>X *   |	    |tld  TO+	 V		       |	   |
>X *   |	    |	+------->+		       |	   |
>X *   |	    |	|	 |		       |	   |
>X *   |	  +--------+	 V		       |	   |
>X *   |	  |	   |<----+<--------------------+	   |
>X *   |	  | Req-   | scr				   |
>X *   |	  | Sent   |					   |
>X *   |	  |	   |					   |
>X *   |	  +--------+					   |
>X *   | RCA- |	| RCA+					   |
>X *   +------+	+------------------------------------------+
>X *   scn,tld	  sca,irc,ict,tlu
>X *
>X *
>X *   with:
>X *
>X *	Open:	LCP reached authentication phase
>X *	Close:	LCP reached terminate phase
>X *
>X *	RCA+:	received reply (pap-req, chap-response), acceptable
>X *	RCN:	received reply (pap-req, chap-response), not acceptable
>X *	TO+:	timeout with restart counter >= 0
>X *	TO-:	timeout with restart counter < 0
>X *	TO*:	reschedule timeout for CHAP
>X *
>X *	scr:	send request packet (none for PAP, chap-challenge)
>X *	sca:	send ack packet (pap-ack, chap-success)
>X *	scn:	send nak packet (pap-nak, chap-failure)
>X *	ict:	initialize re-challenge timer (CHAP only)
>X *
>X *	tlu:	this-layer-up, LCP reaches network phase
>X *	tld:	this-layer-down, LCP enters terminate phase
>X *
>X * Note that in CHAP mode, after sending a new challenge, while the state
>X * automaton falls back into Req-Sent state, it doesn't signal a tld
>X * event to LCP, so LCP remains in network phase.  Only after not getting
>X * any response (or after getting an unacceptable response), CHAP closes,
>X * causing LCP to enter terminate phase.
>X *
>X * With PAP, there is no initial request that can be sent.  The peer is
>X * expected to send one based on the successful negotiation of PAP as
>X * the authentication protocol during the LCP option negotiation.
>X *
>X * Incoming authentication protocol requests (remote requests
>X * authentication, we are peer) don't employ a state machine at all,
>X * they are simply answered.  Some peers [Ascend P50 firmware rev
>X * 4.50] react allergically when sending IPCP requests while they are
>X * still in authentication phase (thereby violating the standard that
>X * demands that these NCP packets are to be discarded), so we keep
>X * track of the peer demanding us to authenticate, and only proceed to
>X * phase network once we've seen a positive acknowledge for the
>X * authentication.
>X */
>X
>X/*
>X * Handle incoming CHAP packets.
>X */
>Xvoid
>Xsppp_chap_input(struct sppp *sp, struct mbuf *m)
>X{
>X	STDDCL;
>X	struct lcp_header *h;
>X	int len, x;
>X	u_char *value, *name, digest[AUTHKEYLEN], dsize;
>X	int value_len, name_len;
>X	MD5_CTX ctx;
>X
>X	len = m->m_pkthdr.len;
>X	if (len < 4) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "chap invalid packet length: %d bytes\n",
>X			    SPP_ARGS(ifp), len);
>X		return;
>X	}
>X	h = mtod (m, struct lcp_header*);
>X	if (len > ntohs (h->len))
>X		len = ntohs (h->len);
>X
>X	switch (h->type) {
>X	/* challenge, failure and success are his authproto */
>X	case CHAP_CHALLENGE:
>X		value = 1 + (u_char*)(h+1);
>X		value_len = value[-1];
>X		name = value + value_len;
>X		name_len = len - value_len - 5;
>X		if (name_len < 0) {
>X			if (debug) {
>X				log(LOG_DEBUG,
>X				    SPP_FMT "chap corrupted challenge "
>X				    "<%s id=0x%x len=%d",
>X				    SPP_ARGS(ifp),
>X				    sppp_auth_type_name(PPP_CHAP, h->type),
>X				    h->ident, ntohs(h->len));
>X				if (len > 4)
>X					sppp_print_bytes((u_char*) (h+1), len-4);
>X				addlog(">\n");
>X			}
>X			break;
>X		}
>X		
>X		if (debug) {
>X			log(LOG_DEBUG,
>X			    SPP_FMT "chap input <%s id=0x%x len=%d name=",
>X			    SPP_ARGS(ifp),
>X			    sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
>X			    ntohs(h->len));
>X			sppp_print_string((char*) name, name_len);
>X			addlog(" value-size=%d value=", value_len);
>X			sppp_print_bytes(value, value_len);
>X			addlog(">\n");
>X		}
>X
>X		/* Compute reply value. */
>X		MD5Init(&ctx);
>X		MD5Update(&ctx, &h->ident, 1);
>X		MD5Update(&ctx, sp->myauth.secret,
>X			  sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
>X		MD5Update(&ctx, value, value_len);
>X		MD5Final(digest, &ctx);
>X		dsize = sizeof digest;
>X
>X		sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
>X			       sizeof dsize, (const char *)&dsize,
>X			       sizeof digest, digest,
>X			       (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
>X			       sp->myauth.name,
>X			       0);
>X		break;
>X
>X	case CHAP_SUCCESS:
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "chap success",
>X			    SPP_ARGS(ifp));
>X			if (len > 4) {
>X				addlog(": ");
>X				sppp_print_string((char*)(h + 1), len - 4);
>X			}
>X			addlog("\n");
>X		}
>X		x = splimp();
>X		sp->pp_flags &= ~PP_NEEDAUTH;
>X		if (sp->myauth.proto == PPP_CHAP &&
>X		    (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
>X		    (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
>X			/*
>X			 * We are authenticator for CHAP but didn't
>X			 * complete yet.  Leave it to tlu to proceed
>X			 * to network phase.
>X			 */
>X			splx(x);
>X			break;
>X		}
>X		splx(x);
>X		sppp_phase_network(sp);
>X		break;
>X
>X	case CHAP_FAILURE:
>X		if (debug) {
>X			log(LOG_INFO, SPP_FMT "chap failure",
>X			    SPP_ARGS(ifp));
>X			if (len > 4) {
>X				addlog(": ");
>X				sppp_print_string((char*)(h + 1), len - 4);
>X			}
>X			addlog("\n");
>X		} else
>X			log(LOG_INFO, SPP_FMT "chap failure\n",
>X			    SPP_ARGS(ifp));
>X		/* await LCP shutdown by authenticator */
>X		break;
>X
>X	/* response is my authproto */
>X	case CHAP_RESPONSE:
>X		value = 1 + (u_char*)(h+1);
>X		value_len = value[-1];
>X		name = value + value_len;
>X		name_len = len - value_len - 5;
>X		if (name_len < 0) {
>X			if (debug) {
>X				log(LOG_DEBUG,
>X				    SPP_FMT "chap corrupted response "
>X				    "<%s id=0x%x len=%d",
>X				    SPP_ARGS(ifp),
>X				    sppp_auth_type_name(PPP_CHAP, h->type),
>X				    h->ident, ntohs(h->len));
>X				if (len > 4)
>X					sppp_print_bytes((u_char*)(h+1), len-4);
>X				addlog(">\n");
>X			}
>X			break;
>X		}
>X		if (h->ident != sp->confid[IDX_CHAP]) {
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "chap dropping response for old ID "
>X				    "(got %d, expected %d)\n",
>X				    SPP_ARGS(ifp),
>X				    h->ident, sp->confid[IDX_CHAP]);
>X			break;
>X		}
>X		if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
>X		    || bcmp(name, sp->hisauth.name, name_len) != 0) {
>X			log(LOG_INFO, SPP_FMT "chap response, his name ",
>X			    SPP_ARGS(ifp));
>X			sppp_print_string(name, name_len);
>X			addlog(" != expected ");
>X			sppp_print_string(sp->hisauth.name,
>X					  sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
>X			addlog("\n");
>X		}    
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "chap input(%s) "
>X			    "<%s id=0x%x len=%d name=",
>X			    SPP_ARGS(ifp),
>X			    sppp_state_name(sp->state[IDX_CHAP]),
>X			    sppp_auth_type_name(PPP_CHAP, h->type),
>X			    h->ident, ntohs (h->len));
>X			sppp_print_string((char*)name, name_len);
>X			addlog(" value-size=%d value=", value_len);
>X			sppp_print_bytes(value, value_len);
>X			addlog(">\n");
>X		}
>X		if (value_len != AUTHKEYLEN) {
>X			if (debug)
>X				log(LOG_DEBUG,
>X				    SPP_FMT "chap bad hash value length: "
>X				    "%d bytes, should be %d\n",
>X				    SPP_ARGS(ifp), value_len,
>X				    AUTHKEYLEN);
>X			break;
>X		}
>X
>X		MD5Init(&ctx);
>X		MD5Update(&ctx, &h->ident, 1);
>X		MD5Update(&ctx, sp->hisauth.secret,
>X			  sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
>X		MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
>X		MD5Final(digest, &ctx);
>X
>X#define FAILMSG "Failed..."
>X#define SUCCMSG "Welcome!"
>X
>X		if (value_len != sizeof digest ||
>X		    bcmp(digest, value, value_len) != 0) {
>X			/* action scn, tld */
>X			sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
>X				       sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
>X				       0);
>X			chap.tld(sp);
>X			break;
>X		}
>X		/* action sca, perhaps tlu */
>X		if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
>X		    sp->state[IDX_CHAP] == STATE_OPENED)
>X			sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
>X				       sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
>X				       0);
>X		if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
>X			sppp_cp_change_state(&chap, sp, STATE_OPENED);
>X			chap.tlu(sp);
>X		}
>X		break;
>X
>X	default:
>X		/* Unknown CHAP packet type -- ignore. */
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
>X			    "<0x%x id=0x%xh len=%d",
>X			    SPP_ARGS(ifp),
>X			    sppp_state_name(sp->state[IDX_CHAP]),
>X			    h->type, h->ident, ntohs(h->len));
>X			if (len > 4)
>X				sppp_print_bytes((u_char*)(h+1), len-4);
>X			addlog(">\n");
>X		}
>X		break;
>X
>X	}
>X}
>X
>Xstatic void
>Xsppp_chap_init(struct sppp *sp)
>X{
>X	/* Chap doesn't have STATE_INITIAL at all. */
>X	sp->state[IDX_CHAP] = STATE_CLOSED;
>X	sp->fail_counter[IDX_CHAP] = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	callout_handle_init(&sp->ch[IDX_CHAP]);
>X#endif
>X}
>X
>Xstatic void
>Xsppp_chap_open(struct sppp *sp)
>X{
>X	if (sp->myauth.proto == PPP_CHAP &&
>X	    (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
>X		/* we are authenticator for CHAP, start it */
>X		chap.scr(sp);
>X		sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
>X		sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
>X	}
>X	/* nothing to be done if we are peer, await a challenge */
>X}
>X
>Xstatic void
>Xsppp_chap_close(struct sppp *sp)
>X{
>X	if (sp->state[IDX_CHAP] != STATE_CLOSED)
>X		sppp_cp_change_state(&chap, sp, STATE_CLOSED);
>X}
>X
>Xstatic void
>Xsppp_chap_TO(void *cookie)
>X{
>X	struct sppp *sp = (struct sppp *)cookie;
>X	STDDCL;
>X	int s;
>X
>X	s = splimp();
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
>X		    SPP_ARGS(ifp),
>X		    sppp_state_name(sp->state[IDX_CHAP]),
>X		    sp->rst_counter[IDX_CHAP]);
>X
>X	if (--sp->rst_counter[IDX_CHAP] < 0)
>X		/* TO- event */
>X		switch (sp->state[IDX_CHAP]) {
>X		case STATE_REQ_SENT:
>X			chap.tld(sp);
>X			sppp_cp_change_state(&chap, sp, STATE_CLOSED);
>X			break;
>X		}
>X	else
>X		/* TO+ (or TO*) event */
>X		switch (sp->state[IDX_CHAP]) {
>X		case STATE_OPENED:
>X			/* TO* event */
>X			sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
>X			/* fall through */
>X		case STATE_REQ_SENT:
>X			chap.scr(sp);
>X			/* sppp_cp_change_state() will restart the timer */
>X			sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
>X			break;
>X		}
>X
>X	splx(s);
>X}
>X
>Xstatic void
>Xsppp_chap_tlu(struct sppp *sp)
>X{
>X	STDDCL;
>X	int i, x;
>X
>X	i = 0;
>X	sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
>X
>X	/*
>X	 * Some broken CHAP implementations (Conware CoNet, firmware
>X	 * 4.0.?) don't want to re-authenticate their CHAP once the
>X	 * initial challenge-response exchange has taken place.
>X	 * Provide for an option to avoid rechallenges.
>X	 */
>X	if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
>X		/*
>X		 * Compute the re-challenge timeout.  This will yield
>X		 * a number between 300 and 810 seconds.
>X		 */
>X		i = 300 + ((unsigned)(random() & 0xff00) >> 7);
>X		TIMEOUT(chap.TO, (void *)sp, i * hz, sp->ch[IDX_CHAP]);
>X	}
>X
>X	if (debug) {
>X		log(LOG_DEBUG,
>X		    SPP_FMT "chap %s, ",
>X		    SPP_ARGS(ifp),
>X		    sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
>X		if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
>X			addlog("next re-challenge in %d seconds\n", i);
>X		else
>X			addlog("re-challenging supressed\n");
>X	}
>X
>X	x = splimp();
>X	/* indicate to LCP that we need to be closed down */
>X	sp->lcp.protos |= (1 << IDX_CHAP);
>X
>X	if (sp->pp_flags & PP_NEEDAUTH) {
>X		/*
>X		 * Remote is authenticator, but his auth proto didn't
>X		 * complete yet.  Defer the transition to network
>X		 * phase.
>X		 */
>X		splx(x);
>X		return;
>X	}
>X	splx(x);
>X
>X	/*
>X	 * If we are already in phase network, we are done here.  This
>X	 * is the case if this is a dummy tlu event after a re-challenge.
>X	 */
>X	if (sp->pp_phase != PHASE_NETWORK)
>X		sppp_phase_network(sp);
>X}
>X
>Xstatic void
>Xsppp_chap_tld(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
>X	UNTIMEOUT(chap.TO, (void *)sp, sp->ch[IDX_CHAP]);
>X	sp->lcp.protos &= ~(1 << IDX_CHAP);
>X
>X	lcp.Close(sp);
>X}
>X
>Xstatic void
>Xsppp_chap_scr(struct sppp *sp)
>X{
>X	u_long *ch, seed;
>X	u_char clen;
>X
>X	/* Compute random challenge. */
>X	ch = (u_long *)sp->myauth.challenge;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	read_random(&seed, sizeof seed);
>X#else
>X	{
>X	struct timeval tv;
>X	microtime(&tv);
>X	seed = tv.tv_sec ^ tv.tv_usec;
>X	}
>X#endif
>X	ch[0] = seed ^ random();
>X	ch[1] = seed ^ random();
>X	ch[2] = seed ^ random();
>X	ch[3] = seed ^ random();
>X	clen = AUTHKEYLEN;
>X
>X	sp->confid[IDX_CHAP] = ++sp->pp_seq;
>X
>X	sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
>X		       sizeof clen, (const char *)&clen,
>X		       (size_t)AUTHKEYLEN, sp->myauth.challenge,
>X		       (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
>X		       sp->myauth.name,
>X		       0);
>X}
>X/*
>X *--------------------------------------------------------------------------*
>X *                                                                          *
>X *                        The PAP implementation.                           *
>X *                                                                          *
>X *--------------------------------------------------------------------------*
>X */
>X/*
>X * For PAP, we need to keep a little state also if we are the peer, not the
>X * authenticator.  This is since we don't get a request to authenticate, but
>X * have to repeatedly authenticate ourself until we got a response (or the
>X * retry counter is expired).
>X */
>X
>X/*
>X * Handle incoming PAP packets.  */
>Xstatic void
>Xsppp_pap_input(struct sppp *sp, struct mbuf *m)
>X{
>X	STDDCL;
>X	struct lcp_header *h;
>X	int len, x;
>X	u_char *name, *passwd, mlen;
>X	int name_len, passwd_len;
>X
>X	len = m->m_pkthdr.len;
>X	if (len < 5) {
>X		if (debug)
>X			log(LOG_DEBUG,
>X			    SPP_FMT "pap invalid packet length: %d bytes\n",
>X			    SPP_ARGS(ifp), len);
>X		return;
>X	}
>X	h = mtod (m, struct lcp_header*);
>X	if (len > ntohs (h->len))
>X		len = ntohs (h->len);
>X	switch (h->type) {
>X	/* PAP request is my authproto */
>X	case PAP_REQ:
>X		name = 1 + (u_char*)(h+1);
>X		name_len = name[-1];
>X		passwd = name + name_len + 1;
>X		if (name_len > len - 6 ||
>X		    (passwd_len = passwd[-1]) > len - 6 - name_len) {
>X			if (debug) {
>X				log(LOG_DEBUG, SPP_FMT "pap corrupted input "
>X				    "<%s id=0x%x len=%d",
>X				    SPP_ARGS(ifp),
>X				    sppp_auth_type_name(PPP_PAP, h->type),
>X				    h->ident, ntohs(h->len));
>X				if (len > 4)
>X					sppp_print_bytes((u_char*)(h+1), len-4);
>X				addlog(">\n");
>X			}
>X			break;
>X		}
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "pap input(%s) "
>X			    "<%s id=0x%x len=%d name=",
>X			    SPP_ARGS(ifp),
>X			    sppp_state_name(sp->state[IDX_PAP]),
>X			    sppp_auth_type_name(PPP_PAP, h->type),
>X			    h->ident, ntohs(h->len));
>X			sppp_print_string((char*)name, name_len);
>X			addlog(" passwd=");
>X			sppp_print_string((char*)passwd, passwd_len);
>X			addlog(">\n");
>X		}
>X		if (name_len > AUTHNAMELEN ||
>X		    passwd_len > AUTHKEYLEN ||
>X		    bcmp(name, sp->hisauth.name, name_len) != 0 ||
>X		    bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
>X			/* action scn, tld */
>X			mlen = sizeof(FAILMSG) - 1;
>X			sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
>X				       sizeof mlen, (const char *)&mlen,
>X				       sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
>X				       0);
>X			pap.tld(sp);
>X			break;
>X		}
>X		/* action sca, perhaps tlu */
>X		if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
>X		    sp->state[IDX_PAP] == STATE_OPENED) {
>X			mlen = sizeof(SUCCMSG) - 1;
>X			sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
>X				       sizeof mlen, (const char *)&mlen,
>X				       sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
>X				       0);
>X		}
>X		if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
>X			sppp_cp_change_state(&pap, sp, STATE_OPENED);
>X			pap.tlu(sp);
>X		}
>X		break;
>X
>X	/* ack and nak are his authproto */
>X	case PAP_ACK:
>X		UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "pap success",
>X			    SPP_ARGS(ifp));
>X			name_len = *((char *)h);
>X			if (len > 5 && name_len) {
>X				addlog(": ");
>X				sppp_print_string((char*)(h+1), name_len);
>X			}
>X			addlog("\n");
>X		}
>X		x = splimp();
>X		sp->pp_flags &= ~PP_NEEDAUTH;
>X		if (sp->myauth.proto == PPP_PAP &&
>X		    (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
>X		    (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
>X			/*
>X			 * We are authenticator for PAP but didn't
>X			 * complete yet.  Leave it to tlu to proceed
>X			 * to network phase.
>X			 */
>X			splx(x);
>X			break;
>X		}
>X		splx(x);
>X		sppp_phase_network(sp);
>X		break;
>X
>X	case PAP_NAK:
>X		UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
>X		if (debug) {
>X			log(LOG_INFO, SPP_FMT "pap failure",
>X			    SPP_ARGS(ifp));
>X			name_len = *((char *)h);
>X			if (len > 5 && name_len) {
>X				addlog(": ");
>X				sppp_print_string((char*)(h+1), name_len);
>X			}
>X			addlog("\n");
>X		} else
>X			log(LOG_INFO, SPP_FMT "pap failure\n",
>X			    SPP_ARGS(ifp));
>X		/* await LCP shutdown by authenticator */
>X		break;
>X
>X	default:
>X		/* Unknown PAP packet type -- ignore. */
>X		if (debug) {
>X			log(LOG_DEBUG, SPP_FMT "pap corrupted input "
>X			    "<0x%x id=0x%x len=%d",
>X			    SPP_ARGS(ifp),
>X			    h->type, h->ident, ntohs(h->len));
>X			if (len > 4)
>X				sppp_print_bytes((u_char*)(h+1), len-4);
>X			addlog(">\n");
>X		}
>X		break;
>X
>X	}
>X}
>X
>Xstatic void
>Xsppp_pap_init(struct sppp *sp)
>X{
>X	/* PAP doesn't have STATE_INITIAL at all. */
>X	sp->state[IDX_PAP] = STATE_CLOSED;
>X	sp->fail_counter[IDX_PAP] = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	callout_handle_init(&sp->ch[IDX_PAP]);
>X	callout_handle_init(&sp->pap_my_to_ch);
>X#endif
>X}
>X
>Xstatic void
>Xsppp_pap_open(struct sppp *sp)
>X{
>X	if (sp->hisauth.proto == PPP_PAP &&
>X	    (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
>X		/* we are authenticator for PAP, start our timer */
>X		sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
>X		sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
>X	}
>X	if (sp->myauth.proto == PPP_PAP) {
>X		/* we are peer, send a request, and start a timer */
>X		pap.scr(sp);
>X		TIMEOUT(sppp_pap_my_TO, (void *)sp, sp->lcp.timeout,
>X		    sp->pap_my_to_ch);
>X	}
>X}
>X
>Xstatic void
>Xsppp_pap_close(struct sppp *sp)
>X{
>X	if (sp->state[IDX_PAP] != STATE_CLOSED)
>X		sppp_cp_change_state(&pap, sp, STATE_CLOSED);
>X}
>X
>X/*
>X * That's the timeout routine if we are authenticator.  Since the
>X * authenticator is basically passive in PAP, we can't do much here.
>X */
>Xstatic void
>Xsppp_pap_TO(void *cookie)
>X{
>X	struct sppp *sp = (struct sppp *)cookie;
>X	STDDCL;
>X	int s;
>X
>X	s = splimp();
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
>X		    SPP_ARGS(ifp),
>X		    sppp_state_name(sp->state[IDX_PAP]),
>X		    sp->rst_counter[IDX_PAP]);
>X
>X	if (--sp->rst_counter[IDX_PAP] < 0)
>X		/* TO- event */
>X		switch (sp->state[IDX_PAP]) {
>X		case STATE_REQ_SENT:
>X			pap.tld(sp);
>X			sppp_cp_change_state(&pap, sp, STATE_CLOSED);
>X			break;
>X		}
>X	else
>X		/* TO+ event, not very much we could do */
>X		switch (sp->state[IDX_PAP]) {
>X		case STATE_REQ_SENT:
>X			/* sppp_cp_change_state() will restart the timer */
>X			sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
>X			break;
>X		}
>X
>X	splx(s);
>X}
>X
>X/*
>X * That's the timeout handler if we are peer.  Since the peer is active,
>X * we need to retransmit our PAP request since it is apparently lost.
>X * XXX We should impose a max counter.
>X */
>Xstatic void
>Xsppp_pap_my_TO(void *cookie)
>X{
>X	struct sppp *sp = (struct sppp *)cookie;
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
>X		    SPP_ARGS(ifp));
>X
>X	pap.scr(sp);
>X}
>X
>Xstatic void
>Xsppp_pap_tlu(struct sppp *sp)
>X{
>X	STDDCL;
>X	int x;
>X
>X	sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "%s tlu\n",
>X		    SPP_ARGS(ifp), pap.name);
>X
>X	x = splimp();
>X	/* indicate to LCP that we need to be closed down */
>X	sp->lcp.protos |= (1 << IDX_PAP);
>X
>X	if (sp->pp_flags & PP_NEEDAUTH) {
>X		/*
>X		 * Remote is authenticator, but his auth proto didn't
>X		 * complete yet.  Defer the transition to network
>X		 * phase.
>X		 */
>X		splx(x);
>X		return;
>X	}
>X	splx(x);
>X	sppp_phase_network(sp);
>X}
>X
>Xstatic void
>Xsppp_pap_tld(struct sppp *sp)
>X{
>X	STDDCL;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
>X	UNTIMEOUT(pap.TO, (void *)sp, sp->ch[IDX_PAP]);
>X	UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
>X	sp->lcp.protos &= ~(1 << IDX_PAP);
>X
>X	lcp.Close(sp);
>X}
>X
>Xstatic void
>Xsppp_pap_scr(struct sppp *sp)
>X{
>X	u_char idlen, pwdlen;
>X
>X	sp->confid[IDX_PAP] = ++sp->pp_seq;
>X	pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
>X	idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
>X
>X	sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
>X		       sizeof idlen, (const char *)&idlen,
>X		       (size_t)idlen, sp->myauth.name,
>X		       sizeof pwdlen, (const char *)&pwdlen,
>X		       (size_t)pwdlen, sp->myauth.secret,
>X		       0);
>X}
>X/*
>X * Random miscellaneous functions.
>X */
>X
>X/*
>X * Send a PAP or CHAP proto packet.
>X *
>X * Varadic function, each of the elements for the ellipsis is of type
>X * ``size_t mlen, const u_char *msg''.  Processing will stop iff
>X * mlen == 0.
>X * NOTE: never declare variadic functions with types subject to type
>X * promotion (i.e. u_char). This is asking for big trouble depending
>X * on the architecture you are on...
>X */
>X
>Xstatic void
>Xsppp_auth_send(const struct cp *cp, struct sppp *sp,
>X               unsigned int type, unsigned int id,
>X	       ...)
>X{
>X	STDDCL;
>X	struct ppp_header *h;
>X	struct lcp_header *lh;
>X	struct mbuf *m;
>X	u_char *p;
>X	int len;
>X	unsigned int mlen;
>X	const char *msg;
>X	va_list ap;
>X
>X	MGETHDR (m, M_DONTWAIT, MT_DATA);
>X	if (! m)
>X		return;
>X	m->m_pkthdr.rcvif = 0;
>X
>X	h = mtod (m, struct ppp_header*);
>X	h->address = PPP_ALLSTATIONS;		/* broadcast address */
>X	h->control = PPP_UI;			/* Unnumbered Info */
>X	h->protocol = htons(cp->proto);
>X
>X	lh = (struct lcp_header*)(h + 1);
>X	lh->type = type;
>X	lh->ident = id;
>X	p = (u_char*) (lh+1);
>X
>X	va_start(ap, id);
>X	len = 0;
>X
>X	while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) {
>X		msg = va_arg(ap, const char *);
>X		len += mlen;
>X		if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
>X			va_end(ap);
>X			m_freem(m);
>X			return;
>X		}
>X
>X		bcopy(msg, p, mlen);
>X		p += mlen;
>X	}
>X	va_end(ap);
>X
>X	m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
>X	lh->len = htons (LCP_HEADER_LEN + len);
>X
>X	if (debug) {
>X		log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
>X		    SPP_ARGS(ifp), cp->name,
>X		    sppp_auth_type_name(cp->proto, lh->type),
>X		    lh->ident, ntohs(lh->len));
>X		if (len)
>X			sppp_print_bytes((u_char*) (lh+1), len);
>X		addlog(">\n");
>X	}
>X	if (IF_QFULL (&sp->pp_cpq)) {
>X		IF_DROP (&sp->pp_fastq);
>X		IF_DROP (&ifp->if_snd);
>X		m_freem (m);
>X		++ifp->if_oerrors;
>X	} else
>X		IF_ENQUEUE (&sp->pp_cpq, m);
>X	if (! (ifp->if_flags & IFF_OACTIVE))
>X		(*ifp->if_start) (ifp);
>X	ifp->if_obytes += m->m_pkthdr.len + 3;
>X}
>X
>X/*
>X * Flush interface queue.
>X */
>Xstatic void
>Xsppp_qflush(struct ifqueue *ifq)
>X{
>X	struct mbuf *m, *n;
>X
>X	n = ifq->ifq_head;
>X	while ((m = n)) {
>X		n = m->m_act;
>X		m_freem (m);
>X	}
>X	ifq->ifq_head = 0;
>X	ifq->ifq_tail = 0;
>X	ifq->ifq_len = 0;
>X}
>X
>X/*
>X * Send keepalive packets, every 10 seconds.
>X */
>Xstatic void
>Xsppp_keepalive(void *dummy)
>X{
>X	struct sppp *sp;
>X	int s;
>X
>X	s = splimp();
>X	for (sp=spppq; sp; sp=sp->pp_next) {
>X		struct ifnet *ifp = &sp->pp_if;
>X
>X		/* Keepalive mode disabled or channel down? */
>X		if (! (sp->pp_flags & PP_KEEPALIVE) ||
>X		    ! (ifp->if_flags & IFF_RUNNING))
>X			continue;
>X
>X		/* No keepalive in PPP mode if LCP not opened yet. */
>X		if (! (sp->pp_flags & PP_CISCO) &&
>X		    sp->pp_phase < PHASE_AUTHENTICATE)
>X			continue;
>X
>X		if (sp->pp_alivecnt == MAXALIVECNT) {
>X			/* No keepalive packets got.  Stop the interface. */
>X			printf (SPP_FMT "down\n", SPP_ARGS(ifp));
>X			if_down (ifp);
>X			sppp_qflush (&sp->pp_cpq);
>X			if (! (sp->pp_flags & PP_CISCO)) {
>X				/* XXX */
>X				/* Shut down the PPP link. */
>X				lcp.Down(sp);
>X				/* Initiate negotiation. XXX */
>X				lcp.Up(sp);
>X			}
>X		}
>X		if (sp->pp_alivecnt <= MAXALIVECNT)
>X			++sp->pp_alivecnt;
>X		if (sp->pp_flags & PP_CISCO)
>X			sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, ++sp->pp_seq,
>X				sp->pp_rseq);
>X		else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
>X			long nmagic = htonl (sp->lcp.magic);
>X			sp->lcp.echoid = ++sp->pp_seq;
>X			sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
>X				sp->lcp.echoid, 4, &nmagic);
>X		}
>X	}
>X	splx(s);
>X	TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch);
>X}
>X
>X/*
>X * Get both IP addresses.
>X */
>Xstatic void
>Xsppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
>X{
>X	struct ifnet *ifp = &sp->pp_if;
>X	struct ifaddr *ifa;
>X	struct sockaddr_in *si, *sm;
>X	u_long ssrc, ddst;
>X
>X	sm = NULL;
>X	ssrc = ddst = 0L;
>X	/*
>X	 * Pick the first AF_INET address from the list,
>X	 * aliases don't make any sense on a p2p link anyway.
>X	 */
>X	si = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
>X#elif defined(__NetBSD__) || defined (__OpenBSD__)
>X	for (ifa = ifp->if_addrlist.tqh_first;
>X	     ifa;
>X	     ifa = ifa->ifa_list.tqe_next)
>X#else
>X	for (ifa = ifp->if_addrlist;
>X	     ifa;
>X	     ifa = ifa->ifa_next)
>X#endif
>X		if (ifa->ifa_addr->sa_family == AF_INET) {
>X			si = (struct sockaddr_in *)ifa->ifa_addr;
>X			sm = (struct sockaddr_in *)ifa->ifa_netmask;
>X			if (si)
>X				break;
>X		}
>X	if (ifa) {
>X		if (si && si->sin_addr.s_addr) {
>X			ssrc = si->sin_addr.s_addr;
>X			if (srcmask)
>X				*srcmask = ntohl(sm->sin_addr.s_addr);
>X		}
>X
>X		si = (struct sockaddr_in *)ifa->ifa_dstaddr;
>X		if (si && si->sin_addr.s_addr)
>X			ddst = si->sin_addr.s_addr;
>X	}
>X
>X	if (dst) *dst = ntohl(ddst);
>X	if (src) *src = ntohl(ssrc);
>X}
>X
>X/*
>X * Set my IP address.  Must be called at splimp.
>X */
>Xstatic void
>Xsppp_set_ip_addr(struct sppp *sp, u_long src)
>X{
>X	STDDCL;
>X	struct ifaddr *ifa;
>X	struct sockaddr_in *si;
>X
>X	/*
>X	 * Pick the first AF_INET address from the list,
>X	 * aliases don't make any sense on a p2p link anyway.
>X	 */
>X	si = 0;
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X	TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
>X#elif defined(__NetBSD__) || defined (__OpenBSD__)
>X	for (ifa = ifp->if_addrlist.tqh_first;
>X	     ifa;
>X	     ifa = ifa->ifa_list.tqe_next)
>X#else
>X	for (ifa = ifp->if_addrlist;
>X	     ifa;
>X	     ifa = ifa->ifa_next)
>X#endif
>X	{
>X		if (ifa->ifa_addr->sa_family == AF_INET)
>X		{
>X			si = (struct sockaddr_in *)ifa->ifa_addr;
>X			if (si)
>X				break;
>X		}
>X	}
>X
>X	if (ifa && si)
>X	{
>X		int error;
>X#if __NetBSD_Version__ >= 103080000
>X		struct sockaddr_in new_sin = *si;
>X
>X		new_sin.sin_addr.s_addr = htonl(src);
>X		error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1);
>X		if(debug && error)
>X		{
>X			log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit "
>X			" failed, error=%d\n", SPP_ARGS(ifp), error);
>X		}
>X#else
>X		/* delete old route */
>X		error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
>X		if(debug && error)
>X		{
>X			log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
>X		    		SPP_ARGS(ifp), error);
>X		}
>X
>X		/* set new address */
>X		si->sin_addr.s_addr = htonl(src);
>X
>X		/* add new route */
>X		error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);		
>X		if (debug && error)
>X		{
>X			log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
>X		    		SPP_ARGS(ifp), error);
>X		}
>X#endif
>X	}
>X}			
>X
>Xstatic int
>Xsppp_params(struct sppp *sp, u_long cmd, void *data)
>X{
>X	u_long subcmd;
>X	struct ifreq *ifr = (struct ifreq *)data;
>X	struct spppreq spr;
>X
>X	/*
>X	 * ifr->ifr_data is supposed to point to a struct spppreq.
>X	 * Check the cmd word first before attempting to fetch all the
>X	 * data.
>X	 */
>X	if ((subcmd = fuword(ifr->ifr_data)) == -1)
>X		return EFAULT;
>X
>X	if (copyin((caddr_t)ifr->ifr_data, &spr, sizeof spr) != 0)
>X		return EFAULT;
>X
>X	switch (subcmd) {
>X	case SPPPIOGDEFS:
>X		if (cmd != SIOCGIFGENERIC)
>X			return EINVAL;
>X		/*
>X		 * We copy over the entire current state, but clean
>X		 * out some of the stuff we don't wanna pass up.
>X		 * Remember, SIOCGIFGENERIC is unprotected, and can be
>X		 * called by any user.  No need to ever get PAP or
>X		 * CHAP secrets back to userland anyway.
>X		 */
>X		bcopy(sp, &spr.defs, sizeof(struct sppp));
>X		bzero(spr.defs.myauth.secret, AUTHKEYLEN);
>X		bzero(spr.defs.myauth.challenge, AUTHKEYLEN);
>X		bzero(spr.defs.hisauth.secret, AUTHKEYLEN);
>X		bzero(spr.defs.hisauth.challenge, AUTHKEYLEN);
>X		return copyout(&spr, (caddr_t)ifr->ifr_data, sizeof spr);
>X
>X	case SPPPIOSDEFS:
>X		if (cmd != SIOCSIFGENERIC)
>X			return EINVAL;
>X		/*
>X		 * We have a very specific idea of which fields we allow
>X		 * being passed back from userland, so to not clobber our
>X		 * current state.  For one, we only allow setting
>X		 * anything if LCP is in dead phase.  Once the LCP
>X		 * negotiations started, the authentication settings must
>X		 * not be changed again.  (The administrator can force an
>X		 * ifconfig down in order to get LCP back into dead
>X		 * phase.)
>X		 *
>X		 * Also, we only allow for authentication parameters to be
>X		 * specified.
>X		 *
>X		 * XXX Should allow to set or clear pp_flags.
>X		 *
>X		 * Finally, if the respective authentication protocol to
>X		 * be used is set differently than 0, but the secret is
>X		 * passed as all zeros, we don't trash the existing secret.
>X		 * This allows an administrator to change the system name
>X		 * only without clobbering the secret (which he didn't get
>X		 * back in a previous SPPPIOGDEFS call).  However, the
>X		 * secrets are cleared if the authentication protocol is
>X		 * reset to 0.
>X		 */
>X		if (sp->pp_phase != PHASE_DEAD)
>X			return EBUSY;
>X
>X		if ((spr.defs.myauth.proto != 0 && spr.defs.myauth.proto != PPP_PAP &&
>X		     spr.defs.myauth.proto != PPP_CHAP) ||
>X		    (spr.defs.hisauth.proto != 0 && spr.defs.hisauth.proto != PPP_PAP &&
>X		     spr.defs.hisauth.proto != PPP_CHAP))
>X			return EINVAL;
>X
>X		if (spr.defs.myauth.proto == 0)
>X			/* resetting myauth */
>X			bzero(&sp->myauth, sizeof sp->myauth);
>X		else {
>X			/* setting/changing myauth */
>X			sp->myauth.proto = spr.defs.myauth.proto;
>X			bcopy(spr.defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
>X			if (spr.defs.myauth.secret[0] != '\0')
>X				bcopy(spr.defs.myauth.secret, sp->myauth.secret,
>X				      AUTHKEYLEN);
>X		}
>X		if (spr.defs.hisauth.proto == 0)
>X			/* resetting hisauth */
>X			bzero(&sp->hisauth, sizeof sp->hisauth);
>X		else {
>X			/* setting/changing hisauth */
>X			sp->hisauth.proto = spr.defs.hisauth.proto;
>X			sp->hisauth.flags = spr.defs.hisauth.flags;
>X			bcopy(spr.defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
>X			if (spr.defs.hisauth.secret[0] != '\0')
>X				bcopy(spr.defs.hisauth.secret, sp->hisauth.secret,
>X				      AUTHKEYLEN);
>X		}
>X		break;
>X
>X	default:
>X		return EINVAL;
>X	}
>X
>X	return 0;
>X}
>X
>Xstatic void
>Xsppp_phase_network(struct sppp *sp)
>X{
>X	STDDCL;
>X	int i;
>X	u_long mask;
>X
>X	sp->pp_phase = PHASE_NETWORK;
>X
>X	if (debug)
>X		log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
>X		    sppp_phase_name(sp->pp_phase));
>X
>X	/* Notify NCPs now. */
>X	for (i = 0; i < IDX_COUNT; i++)
>X		if ((cps[i])->flags & CP_NCP)
>X			(cps[i])->Open(sp);
>X
>X	/* Send Up events to all NCPs. */
>X	for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
>X		if (sp->lcp.protos & mask && ((cps[i])->flags & CP_NCP))
>X			(cps[i])->Up(sp);
>X
>X	/* if no NCP is starting, all this was in vain, close down */
>X	sppp_lcp_check_and_close(sp);
>X}
>X	
>X
>Xstatic const char *
>Xsppp_cp_type_name(u_char type)
>X{
>X	static char buf[12];
>X	switch (type) {
>X	case CONF_REQ:   return "conf-req";
>X	case CONF_ACK:   return "conf-ack";
>X	case CONF_NAK:   return "conf-nak";
>X	case CONF_REJ:   return "conf-rej";
>X	case TERM_REQ:   return "term-req";
>X	case TERM_ACK:   return "term-ack";
>X	case CODE_REJ:   return "code-rej";
>X	case PROTO_REJ:  return "proto-rej";
>X	case ECHO_REQ:   return "echo-req";
>X	case ECHO_REPLY: return "echo-reply";
>X	case DISC_REQ:   return "discard-req";
>X	}
>X	snprintf (buf, sizeof(buf), "0x%x", type);
>X	return buf;
>X}
>X
>Xstatic const char *
>Xsppp_auth_type_name(u_short proto, u_char type)
>X{
>X	static char buf[12];
>X	switch (proto) {
>X	case PPP_CHAP:
>X		switch (type) {
>X		case CHAP_CHALLENGE:	return "challenge";
>X		case CHAP_RESPONSE:	return "response";
>X		case CHAP_SUCCESS:	return "success";
>X		case CHAP_FAILURE:	return "failure";
>X		}
>X	case PPP_PAP:
>X		switch (type) {
>X		case PAP_REQ:		return "req";
>X		case PAP_ACK:		return "ack";
>X		case PAP_NAK:		return "nak";
>X		}
>X	}
>X	snprintf (buf, sizeof(buf), "0x%x", type);
>X	return buf;
>X}
>X
>Xstatic const char *
>Xsppp_lcp_opt_name(u_char opt)
>X{
>X	static char buf[12];
>X	switch (opt) {
>X	case LCP_OPT_MRU:		return "mru";
>X	case LCP_OPT_ASYNC_MAP:		return "async-map";
>X	case LCP_OPT_AUTH_PROTO:	return "auth-proto";
>X	case LCP_OPT_QUAL_PROTO:	return "qual-proto";
>X	case LCP_OPT_MAGIC:		return "magic";
>X	case LCP_OPT_PROTO_COMP:	return "proto-comp";
>X	case LCP_OPT_ADDR_COMP:		return "addr-comp";
>X	}
>X	snprintf (buf, sizeof(buf), "0x%x", opt);
>X	return buf;
>X}
>X
>Xstatic const char *
>Xsppp_ipcp_opt_name(u_char opt)
>X{
>X	static char buf[12];
>X	switch (opt) {
>X	case IPCP_OPT_ADDRESSES:	return "addresses";
>X	case IPCP_OPT_COMPRESSION:	return "compression";
>X	case IPCP_OPT_ADDRESS:		return "address";
>X	}
>X	snprintf (buf, sizeof(buf), "0x%x", opt);
>X	return buf;
>X}
>X
>Xstatic const char *
>Xsppp_state_name(int state)
>X{
>X	switch (state) {
>X	case STATE_INITIAL:	return "initial";
>X	case STATE_STARTING:	return "starting";
>X	case STATE_CLOSED:	return "closed";
>X	case STATE_STOPPED:	return "stopped";
>X	case STATE_CLOSING:	return "closing";
>X	case STATE_STOPPING:	return "stopping";
>X	case STATE_REQ_SENT:	return "req-sent";
>X	case STATE_ACK_RCVD:	return "ack-rcvd";
>X	case STATE_ACK_SENT:	return "ack-sent";
>X	case STATE_OPENED:	return "opened";
>X	}
>X	return "illegal";
>X}
>X
>Xstatic const char *
>Xsppp_phase_name(enum ppp_phase phase)
>X{
>X	switch (phase) {
>X	case PHASE_DEAD:	return "dead";
>X	case PHASE_ESTABLISH:	return "establish";
>X	case PHASE_TERMINATE:	return "terminate";
>X	case PHASE_AUTHENTICATE: return "authenticate";
>X	case PHASE_NETWORK:	return "network";
>X	}
>X	return "illegal";
>X}
>X
>Xstatic const char *
>Xsppp_proto_name(u_short proto)
>X{
>X	static char buf[12];
>X	switch (proto) {
>X	case PPP_LCP:	return "lcp";
>X	case PPP_IPCP:	return "ipcp";
>X	case PPP_PAP:	return "pap";
>X	case PPP_CHAP:	return "chap";
>X	}
>X	snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto);
>X	return buf;
>X}
>X
>Xstatic void
>Xsppp_print_bytes(const u_char *p, u_short len)
>X{
>X	addlog(" %02x", *p++);
>X	while (--len > 0)
>X		addlog("-%02x", *p++);
>X}
>X
>Xstatic void
>Xsppp_print_string(const char *p, u_short len)
>X{
>X	u_char c;
>X
>X	while (len-- > 0) {
>X		c = *p++;
>X		/*
>X		 * Print only ASCII chars directly.  RFC 1994 recommends
>X		 * using only them, but we don't rely on it.  */
>X		if (c < ' ' || c > '~')
>X			addlog("\\x%x", c);
>X		else
>X			addlog("%c", c);
>X	}
>X}
>X
>Xstatic const char *
>Xsppp_dotted_quad(u_long addr)
>X{
>X	static char s[16];
>X	sprintf(s, "%d.%d.%d.%d",
>X		(int)((addr >> 24) & 0xff),
>X		(int)((addr >> 16) & 0xff),
>X		(int)((addr >> 8) & 0xff),
>X		(int)(addr & 0xff));
>X	return s;
>X}
>X
>Xstatic int
>Xsppp_strnlen(u_char *p, int max)
>X{
>X	int len;
>X
>X	for (len = 0; len < max && *p; ++p)
>X		++len;
>X	return len;
>X}
>X
>X/* a dummy, used to drop uninteresting events */
>Xstatic void
>Xsppp_null(struct sppp *unused)
>X{
>X	/* do just nothing */
>X}
>END-of-./usr/src/sys/net/if_spppsubr.c.orig
>echo c - ./usr/src/sys/i4b
>mkdir -p ./usr/src/sys/i4b > /dev/null 2>&1
>echo c - ./usr/src/sys/i4b/driver
>mkdir -p ./usr/src/sys/i4b/driver > /dev/null 2>&1
>echo x - ./usr/src/sys/i4b/driver/i4b_isppp.c
>sed 's/^X//' >./usr/src/sys/i4b/driver/i4b_isppp.c << 'END-of-./usr/src/sys/i4b/driver/i4b_isppp.c'
>X/*
>X *   Copyright (c) 1997 Joerg Wunsch. All rights reserved.
>X *
>X *   Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved.
>X *
>X *   Redistribution and use in source and binary forms, with or without
>X *   modification, are permitted provided that the following conditions
>X *   are met:
>X *
>X *   1. Redistributions of source code must retain the above copyright
>X *      notice, this list of conditions and the following disclaimer.
>X *   2. Redistributions in binary form must reproduce the above copyright
>X *      notice, this list of conditions and the following disclaimer in the
>X *      documentation and/or other materials provided with the distribution.
>X *   
>X *   THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
>X *   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>X *   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>X *   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
>X *   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>X *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>X *   OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>X *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>X *   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>X *   OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>X *   SUCH DAMAGE.
>X *
>X *---------------------------------------------------------------------------
>X *
>X *	i4b_isppp.c - isdn4bsd kernel SyncPPP driver
>X *	--------------------------------------------
>X *
>X * 	Uses Serge Vakulenko's sppp backend (originally contributed with
>X *	the "cx" driver for Cronyx's HDLC-in-hardware device).  This driver
>X *	is only the glue between sppp and i4b.
>X *
>X *	$Id: i4b_isppp.c,v 1.1 1998/12/27 21:46:42 phk Exp $
>X *
>X *	last edit-date: [Fri Dec 18 11:47:58 1998]
>X *
>X *---------------------------------------------------------------------------*/
>X
>X#include "i4bisppp.h"
>X#ifdef __FreeBSD__
>X#include "sppp.h"
>X#endif
>X
>X#if NI4BISPPP == 0
>X# error "You need to define `pseudo-device sppp <N>' with options ISPPP"
>X#endif
>X
>X#include <sys/param.h>
>X#include <sys/systm.h>
>X#include <sys/mbuf.h>
>X#include <sys/socket.h>
>X#include <sys/errno.h>
>X#include <sys/ioccom.h>
>X#include <sys/sockio.h>
>X#include <sys/kernel.h>
>X#include <sys/protosw.h>
>X
>X#include <net/if.h>
>X#include <net/if_types.h>
>X#include <net/netisr.h>
>X#include <net/route.h>
>X#ifdef __FreeBSD__
>X#include <net/if_sppp.h>
>X#else
>X#include <i4b/sppp/if_sppp.h>
>X#endif
>X
>X#include <netinet/in.h>
>X#include <netinet/in_systm.h>
>X#include <netinet/in_var.h>
>X#include <netinet/ip.h>
>X
>X#include "bpfilter.h"
>X#if NBPFILTER > 0
>X#include <sys/time.h>
>X#include <net/bpf.h>
>X#endif
>X
>X#ifdef __FreeBSD__
>X#include <machine/i4b_ioctl.h>
>X#include <machine/i4b_cause.h>
>X#else
>X#include <i4b/i4b_ioctl.h>
>X#include <i4b/i4b_cause.h>
>X#endif
>X
>X#include <i4b/include/i4b_global.h>
>X#include <i4b/include/i4b_mbuf.h>
>X#include <i4b/include/i4b_l3l4.h>
>X
>X#include <i4b/layer4/i4b_l4.h>
>X
>X#ifdef __FreeBSD__
>X#define ISPPP_FMT	"isp%d: "
>X#define	ISPPP_ARG(sc)	((sc)->sc_if.if_unit)
>X#define	PDEVSTATIC	static
>X#define IFP2UNIT(ifp)	(ifp)->if_unit
>X		
>X# if __FreeBSD_version >= 300001
>X#  define CALLOUT_INIT(chan)		callout_handle_init(chan)
>X#  define TIMEOUT(fun, arg, chan, tick)	chan = timeout(fun, arg, tick)
>X#  define UNTIMEOUT(fun, arg, chan)	untimeout(fun, arg, chan)
>X#  define IOCTL_CMD_T u_long
>X# else
>X#  define CALLOUT_INIT(chan)		do {} while(0)
>X#  define TIMEOUT(fun, arg, chan, tick)	timeout(fun, arg, tick)
>X#  define UNTIMEOUT(fun, arg, chan)	untimeout(fun, arg)
>X#  define IOCTL_CMD_T int
>X# endif
>X
>X#elif defined __NetBSD__ || defined __OpenBSD__
>X#define	ISPPP_FMT	"%s: "
>X#define	ISPPP_ARG(sc)	((sc)->sc_if.if_xname)
>X#define	PDEVSTATIC	/* not static */
>X#define IOCTL_CMD_T	u_long
>X#define IFP2UNIT(ifp)	((struct i4bisppp_softc *)ifp->if_softc)->sc_unit
>X#else
>X# error "What system are you using?"
>X#endif
>X
>X#ifdef __FreeBSD__
>XPDEVSTATIC void i4bispppattach(void *);
>XPSEUDO_SET(i4bispppattach, i4b_isppp);
>X#else
>XPDEVSTATIC void i4bispppattach __P((void));
>X#endif
>X
>X#define I4BISPPPACCT		1	/* enable accounting messages */
>X#define	I4BISPPPACCTINTVL	2	/* accounting msg interval in secs */
>X#define I4BISPPPDISCDEBUG	1	
>X
>X#define PPP_HDRLEN   		4	/* 4 octetts PPP header length	*/
>X
>Xstruct i4bisppp_softc {
>X	/*
>X	 * struct sppp starts with a struct ifnet, but we gotta allocate
>X	 * more space for it.  NB: do not relocate this union, it must
>X	 * be first in isppp_softc.  The tls and tlf hooks below want to
>X	 * convert a ``struct sppp *'' into a ``struct isppp_softc *''.
>X	 */
>X	union {
>X		struct ifnet scu_if;
>X		struct sppp scu_sp;
>X	} sc_if_un;
>X#define sc_if sc_if_un.scu_if
>X
>X	int	sc_state;	/* state of the interface	*/
>X
>X#ifndef __FreeBSD__
>X	int	sc_unit;	/* unit number for Net/OpenBSD	*/
>X#endif
>X
>X	call_desc_t *sc_cdp;	/* ptr to call descriptor	*/
>X
>X#ifdef I4BISPPPACCT
>X	int sc_iinb;		/* isdn driver # of inbytes	*/
>X	int sc_ioutb;		/* isdn driver # of outbytes	*/
>X	int sc_inb;		/* # of bytes rx'd		*/
>X	int sc_outb;		/* # of bytes tx'd	 	*/
>X	int sc_linb;		/* last # of bytes rx'd		*/
>X	int sc_loutb;		/* last # of bytes tx'd 	*/
>X	int sc_fn;		/* flag, first null acct	*/
>X#endif
>X
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X	struct callout_handle sc_ch;
>X#endif
>X
>X} i4bisppp_softc[NI4BISPPP];
>X
>Xstatic void	i4bisppp_init_linktab(int unit);
>Xstatic int	i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data);
>X
>X#if 0
>Xstatic void	i4bisppp_send(struct ifnet *ifp);
>X#endif
>X
>Xstatic void	i4bisppp_start(struct ifnet *ifp);
>X
>X#if 0 /* never used ??? */
>Xstatic void	i4bisppp_timeout(void *cookie);
>X#endif
>X
>Xstatic void	i4bisppp_tls(struct sppp *sp);
>Xstatic void	i4bisppp_tlf(struct sppp *sp);
>Xstatic void	i4bisppp_state_changed(struct sppp *sp, int new_state);
>Xstatic void	i4bisppp_negotiation_complete(struct sppp *sp);
>Xstatic void	i4bisppp_watchdog(struct ifnet *ifp);
>Xtime_t   	i4bisppp_idletime(int unit);
>X
>X/* initialized by L4 */
>X
>Xstatic drvr_link_t i4bisppp_drvr_linktab[NI4BISPPP];
>Xstatic isdn_link_t *isdn_linktab[NI4BISPPP];
>X
>Xenum i4bisppp_states {
>X	ST_IDLE,			/* initialized, ready, idle	*/
>X	ST_DIALING,			/* dialling out to remote	*/
>X	ST_CONNECTED,			/* connected to remote		*/
>X};
>X
>X/*===========================================================================*
>X *			DEVICE DRIVER ROUTINES
>X *===========================================================================*/
>X
>X/*---------------------------------------------------------------------------*
>X *	interface attach routine at kernel boot time
>X *---------------------------------------------------------------------------*/
>XPDEVSTATIC void
>X#ifdef __FreeBSD__
>Xi4bispppattach(void *dummy)
>X#else
>Xi4bispppattach(void)
>X#endif
>X{
>X	struct i4bisppp_softc *sc = i4bisppp_softc;
>X	int i;
>X
>X#ifndef HACK_NO_PSEUDO_ATTACH_MSG
>X	printf("i4bisppp: %d ISDN SyncPPP device(s) attached\n",
>X	       NI4BISPPP);
>X#endif
>X
>X	for(i = 0; i < NI4BISPPP; sc++, i++) {
>X		i4bisppp_init_linktab(i);
>X		
>X		sc->sc_if.if_softc = sc;
>X
>X#ifdef __FreeBSD__		
>X		sc->sc_if.if_name = "isp";
>X#if defined(__FreeBSD_version) && __FreeBSD_version < 300001
>X		sc->sc_if.if_next = NULL;
>X#endif
>X		sc->sc_if.if_unit = i;
>X#else
>X		sprintf(sc->sc_if.if_xname, "isp%d", i);
>X		sc->sc_unit = i;
>X#endif
>X
>X		sc->sc_if.if_mtu = PP_MTU;
>X		sc->sc_if.if_flags = IFF_SIMPLEX | IFF_POINTOPOINT;
>X		sc->sc_if.if_type = IFT_ISDNBASIC;
>X		sc->sc_state = ST_IDLE;
>X
>X		sc->sc_if.if_ioctl = i4bisppp_ioctl;
>X
>X		/* actually initialized by sppp_attach() */
>X		/* sc->sc_if.if_output = sppp_output; */
>X
>X		sc->sc_if.if_start = i4bisppp_start;
>X
>X		sc->sc_if.if_hdrlen = 0;
>X		sc->sc_if.if_addrlen = 0;
>X		sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
>X
>X		sc->sc_if.if_ipackets = 0;
>X		sc->sc_if.if_ierrors = 0;
>X		sc->sc_if.if_opackets = 0;
>X		sc->sc_if.if_oerrors = 0;
>X		sc->sc_if.if_collisions = 0;
>X		sc->sc_if.if_ibytes = 0;
>X		sc->sc_if.if_obytes = 0;
>X		sc->sc_if.if_imcasts = 0;
>X		sc->sc_if.if_omcasts = 0;
>X		sc->sc_if.if_iqdrops = 0;
>X		sc->sc_if.if_noproto = 0;
>X
>X#if I4BISPPPACCT
>X		sc->sc_if.if_timer = 0;	
>X		sc->sc_if.if_watchdog = i4bisppp_watchdog;	
>X		sc->sc_iinb = 0;
>X		sc->sc_ioutb = 0;
>X		sc->sc_inb = 0;
>X		sc->sc_outb = 0;
>X		sc->sc_linb = 0;
>X		sc->sc_loutb = 0;
>X		sc->sc_fn = 1;
>X#endif
>X
>X		sc->sc_if_un.scu_sp.pp_tls = i4bisppp_tls;
>X		sc->sc_if_un.scu_sp.pp_tlf = i4bisppp_tlf;
>X		sc->sc_if_un.scu_sp.pp_con = i4bisppp_negotiation_complete;
>X		sc->sc_if_un.scu_sp.pp_chg = i4bisppp_state_changed;
>X
>X		sppp_attach(&sc->sc_if);
>X		if_attach(&sc->sc_if);
>X
>X#if NBPFILTER > 0
>X#ifdef __FreeBSD__
>X		bpfattach(&sc->sc_if, DLT_PPP, PPP_HDRLEN);
>X		CALLOUT_INIT(&sc->sc_ch);
>X#endif /* __FreeBSD__ */
>X#ifdef __NetBSD__
>X		bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_PPP, sizeof(u_int));
>X#endif
>X#endif		
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	process ioctl
>X *---------------------------------------------------------------------------*/
>Xstatic int
>Xi4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
>X{
>X	struct i4bisppp_softc *sc = ifp->if_softc;
>X#if 0
>X	struct sppp *sp = (struct sppp *)sc;
>X	struct ifaddr *ifa = (struct ifaddr *) data;
>X	struct ifreq *ifr = (struct ifreq *) data;
>X#endif
>X
>X	int error;
>X
>X	error = sppp_ioctl(&sc->sc_if, cmd, data);
>X	if (error)
>X		return error;
>X
>X	switch(cmd) {
>X	case SIOCSIFFLAGS:
>X#if 0 /* never used ??? */
>X		x = splimp();
>X		if ((ifp->if_flags & IFF_UP) == 0)
>X			UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
>X		splx(x);
>X#endif
>X		break;
>X	}
>X
>X	return 0;
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	start output to ISDN B-channel
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_start(struct ifnet *ifp)
>X{
>X	struct i4bisppp_softc *sc = ifp->if_softc;
>X	struct mbuf *m;
>X	int s;
>X	int unit = IFP2UNIT(ifp);
>X
>X	if (sppp_isempty(ifp))
>X		return;
>X
>X	if(sc->sc_state != ST_CONNECTED)
>X		return;
>X
>X	s = splimp();
>X	/*ifp->if_flags |= IFF_OACTIVE; - need to clear this somewhere */
>X	splx(s);
>X
>X	while ((m = sppp_dequeue(&sc->sc_if)) != NULL)
>X	{
>X
>X#if NBPFILTER > 0
>X#ifdef __FreeBSD__
>X		if (ifp->if_bpf)
>X			bpf_mtap(ifp, m);
>X#endif /* __FreeBSD__ */
>X
>X#ifdef __NetBSD__
>X		if (ifp->if_bpf)
>X			bpf_mtap(ifp->if_bpf, m);
>X#endif
>X#endif /* NBPFILTER > 0 */
>X
>X		microtime(&ifp->if_lastchange);
>X
>X		IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
>X
>X		sc->sc_if.if_obytes += m->m_pkthdr.len;
>X		sc->sc_outb += m->m_pkthdr.len;
>X		sc->sc_if.if_opackets++;
>X	}
>X	isdn_linktab[unit]->bch_tx_start(isdn_linktab[unit]->unit,
>X					 isdn_linktab[unit]->channel);
>X}
>X
>X#ifdef I4BISPPPACCT
>X/*---------------------------------------------------------------------------*
>X *	watchdog routine
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_watchdog(struct ifnet *ifp)
>X{
>X	struct i4bisppp_softc *sc = ifp->if_softc;
>X	int unit = IFP2UNIT(ifp);
>X	bchan_statistics_t bs;
>X	
>X	(*isdn_linktab[unit]->bch_stat)
>X		(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
>X
>X	sc->sc_ioutb += bs.outbytes;
>X	sc->sc_iinb += bs.inbytes;
>X	
>X	if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
>X	{
>X		int ri = (sc->sc_iinb - sc->sc_linb)/I4BISPPPACCTINTVL;
>X		int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BISPPPACCTINTVL;
>X
>X		if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
>X			sc->sc_fn = 0;
>X		else
>X			sc->sc_fn = 1;
>X			
>X		sc->sc_linb = sc->sc_iinb;
>X		sc->sc_loutb = sc->sc_ioutb;
>X
>X		i4b_l4_accounting(BDRV_ISPPP, unit, ACCT_DURING,
>X			 sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
>X 	}
>X	sc->sc_if.if_timer = I4BISPPPACCTINTVL; 	
>X
>X#if 0 /* old stuff, keep it around */
>X	printf(ISPPP_FMT "transmit timeout\n", ISPPP_ARG(sc));
>X	i4bisppp_start(ifp);
>X#endif
>X}
>X#endif /* I4BISPPPACCT */
>X
>X/*
>X *===========================================================================*
>X *			SyncPPP layer interface routines
>X *===========================================================================*
>X */
>X
>X#if 0 /* never used ??? */
>X/*---------------------------------------------------------------------------*
>X *	just an alias for i4bisppp_tls, but of type timeout_t
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_timeout(void *cookie)
>X{
>X	i4bisppp_tls((struct sppp *)cookie);
>X}
>X#endif
>X
>X/*---------------------------------------------------------------------------*
>X *	PPP this-layer-started action
>X *---------------------------------------------------------------------------*
>X */
>Xstatic void
>Xi4bisppp_tls(struct sppp *sp)
>X{
>X	struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
>X	struct ifnet *ifp = (struct ifnet *)sp;
>X
>X	if(sc->sc_state == ST_CONNECTED)
>X		return;
>X
>X	i4b_l4_dialout(BDRV_ISPPP, IFP2UNIT(ifp));
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	PPP this-layer-finished action
>X *---------------------------------------------------------------------------*
>X */
>Xstatic void
>Xi4bisppp_tlf(struct sppp *sp)
>X{
>X	struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
>X/*	call_desc_t *cd = sc->sc_cdp;	*/
>X        struct ifnet *ifp = (struct ifnet *)sp;	
>X	
>X	if(sc->sc_state != ST_CONNECTED)
>X		return;
>X
>X#if 0 /* never used ??? */
>X	UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
>X#endif
>X
>X	i4b_l4_drvrdisc(BDRV_ISPPP, IFP2UNIT(ifp));
>X}
>X/*---------------------------------------------------------------------------*
>X *	PPP interface phase change
>X *---------------------------------------------------------------------------*
>X */
>Xstatic void
>Xi4bisppp_state_changed(struct sppp *sp, int new_state)
>X{
>X	struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
>X	
>X	i4b_l4_ifstate_changed(sc->sc_cdp, new_state);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	PPP control protocol negotiation complete (run ip-up script now)
>X *---------------------------------------------------------------------------*
>X */
>Xstatic void
>Xi4bisppp_negotiation_complete(struct sppp *sp)
>X{
>X	struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
>X	
>X	i4b_l4_negcomplete(sc->sc_cdp);
>X}
>X
>X/*===========================================================================*
>X *			ISDN INTERFACE ROUTINES
>X *===========================================================================*/
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from L4 handler at connect time
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_connect(int unit, void *cdp)
>X{
>X	struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
>X	struct sppp *sp = &sc->sc_if_un.scu_sp;
>X	int s = splimp();
>X
>X	sc->sc_cdp = (call_desc_t *)cdp;
>X	sc->sc_state = ST_CONNECTED;
>X
>X#if I4BISPPPACCT
>X	sc->sc_iinb = 0;
>X	sc->sc_ioutb = 0;
>X	sc->sc_inb = 0;
>X	sc->sc_outb = 0;
>X	sc->sc_linb = 0;
>X	sc->sc_loutb = 0;
>X	sc->sc_if.if_timer = I4BISPPPACCTINTVL;
>X#endif
>X	
>X#if 0 /* never used ??? */
>X	UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
>X#endif
>X
>X	sp->pp_up(sp);		/* tell PPP we are ready */
>X	sp->pp_last_sent = sp->pp_last_recv = SECOND;
>X	splx(s);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from L4 handler at disconnect time
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_disconnect(int unit, void *cdp)
>X{
>X	call_desc_t *cd = (call_desc_t *)cdp;
>X	struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
>X	struct sppp *sp = &sc->sc_if_un.scu_sp;
>X
>X	int s = splimp();
>X
>X	/* new stuff to check that the active channel is being closed */
>X	if (cd != sc->sc_cdp)
>X	{
>X#ifdef I4BISPPPDISCDEBUG		
>X		printf("i4bisppp_disconnect: isppp%d channel%d not active\n",
>X			cd->driver_unit, cd->channelid);
>X#endif
>X		splx(s);
>X		return;
>X	}
>X
>X#if I4BISPPPACCT
>X	sc->sc_if.if_timer = 0;
>X#endif
>X
>X	i4b_l4_accounting(BDRV_ISPPP, unit, ACCT_FINAL,
>X		 sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
>X	
>X	if (sc->sc_state == ST_CONNECTED)
>X	{
>X#if 0 /* never used ??? */
>X		UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
>X#endif
>X		sc->sc_cdp = (call_desc_t *)0;	
>X		/* do thhis here because pp_down calls i4bisppp_tlf */
>X		sc->sc_state = ST_IDLE;
>X		sp->pp_down(sp);	/* tell PPP we have hung up */
>X	}
>X
>X	splx(s);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is used to give a feedback from userland demon
>X *	in case of dial problems
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_dialresponse(int unit, int status)
>X{
>X/*	struct i4bisppp_softc *sc = &i4bisppp_softc[unit];	*/
>X}
>X	
>X/*---------------------------------------------------------------------------*
>X *	interface up/down
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_updown(int unit, int updown)
>X{
>X	/* could probably do something useful here */
>X}
>X	
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from the HSCX interrupt handler
>X *	when a new frame (mbuf) has been received and was put on
>X *	the rx queue.
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_rx_data_rdy(int unit)
>X{
>X	struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
>X	struct mbuf *m;
>X	int s;
>X	
>X	if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
>X		return;
>X
>X	m->m_pkthdr.rcvif = &sc->sc_if;
>X	m->m_pkthdr.len = m->m_len;
>X
>X	microtime(&sc->sc_if.if_lastchange);
>X
>X	sc->sc_if.if_ipackets++;
>X	sc->sc_if.if_ibytes += m->m_pkthdr.len;
>X
>X#if I4BISPPPACCT
>X	sc->sc_inb += m->m_pkthdr.len;
>X#endif
>X	
>X#ifdef I4BISPPPDEBUG
>X	printf("i4bisppp_rx_data_ready: received packet!\n");
>X#endif
>X
>X#if NBPFILTER > 0
>X
>X#ifdef __FreeBSD__	
>X	if(sc->sc_if.if_bpf)
>X		bpf_mtap(&sc->sc_if, m);
>X#endif /* __FreeBSD__ */
>X
>X#ifdef __NetBSD__
>X	if(sc->sc_if.if_bpf)
>X		bpf_mtap(sc->sc_if.if_bpf, m);
>X#endif
>X
>X#endif /* NBPFILTER > 0 */
>X
>X	s = splimp();
>X
>X	sppp_input(&sc->sc_if, m);
>X
>X	splx(s);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from the HSCX interrupt handler
>X *	when the last frame has been sent out and there is no
>X *	further frame (mbuf) in the tx queue.
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_tx_queue_empty(int unit)
>X{
>X	i4bisppp_start(&i4bisppp_softc[unit].sc_if);	
>X}
>X/*---------------------------------------------------------------------------*
>X *	THIS should be used instead of last_active_time to implement
>X *	an activity timeout mechanism.
>X *---------------------------------------------------------------------------*/
>Xtime_t
>Xi4bisppp_idletime(int unit)
>X{
>X	struct sppp *sp;
>X	time_t now_time, sent_time, recv_time;
>X	sp = (struct sppp *) &i4bisppp_softc[unit];
>X
>X	now_time = SECOND;
>X	sent_time = now_time - sp->pp_last_sent;
>X	recv_time = now_time - sp->pp_last_recv;
>X	return (sent_time<recv_time)? sent_time : recv_time;
>X}
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from the HSCX interrupt handler
>X *	each time a packet is received or transmitted. It should
>X *	be used to implement an activity timeout mechanism.
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_activity(int unit, int rxtx)
>X{
>X	i4bisppp_softc[unit].sc_cdp->last_active_time = SECOND;
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	return this drivers linktab address
>X *---------------------------------------------------------------------------*/
>Xdrvr_link_t *
>Xi4bisppp_ret_linktab(int unit)
>X{
>X	return(&i4bisppp_drvr_linktab[unit]);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	setup the isdn_linktab for this driver
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4bisppp_set_linktab(int unit, isdn_link_t *ilt)
>X{
>X	isdn_linktab[unit] = ilt;
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	initialize this drivers linktab
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_init_linktab(int unit)
>X{
>X	i4bisppp_drvr_linktab[unit].unit = unit;
>X	i4bisppp_drvr_linktab[unit].bch_rx_data_ready = i4bisppp_rx_data_rdy;
>X	i4bisppp_drvr_linktab[unit].bch_tx_queue_empty = i4bisppp_tx_queue_empty;
>X	i4bisppp_drvr_linktab[unit].bch_activity = i4bisppp_activity;
>X	i4bisppp_drvr_linktab[unit].line_connected = i4bisppp_connect;
>X	i4bisppp_drvr_linktab[unit].line_disconnected = i4bisppp_disconnect;
>X	i4bisppp_drvr_linktab[unit].dial_response = i4bisppp_dialresponse;	
>X	i4bisppp_drvr_linktab[unit].updown_ind = i4bisppp_updown;	
>X}
>X
>X/*===========================================================================*/
>END-of-./usr/src/sys/i4b/driver/i4b_isppp.c
>echo x - ./usr/src/sys/i4b/driver/i4b_isppp.c.patch
>sed 's/^X//' >./usr/src/sys/i4b/driver/i4b_isppp.c.patch << 'END-of-./usr/src/sys/i4b/driver/i4b_isppp.c.patch'
>X*** i4b_isppp.c	Fri Dec 18 15:20:44 1998
>X--- i4b_isppp.c.new	Wed Mar 17 13:16:02 1999
>X***************
>X*** 190,195 ****
>X--- 190,196 ----
>X  static void	i4bisppp_state_changed(struct sppp *sp, int new_state);
>X  static void	i4bisppp_negotiation_complete(struct sppp *sp);
>X  static void	i4bisppp_watchdog(struct ifnet *ifp);
>X+ time_t   	i4bisppp_idletime(int unit);
>X  
>X  /* initialized by L4 */
>X  
>X***************
>X*** 532,538 ****
>X  #endif
>X  
>X  	sp->pp_up(sp);		/* tell PPP we are ready */
>X! 
>X  	splx(s);
>X  }
>X  
>X--- 533,539 ----
>X  #endif
>X  
>X  	sp->pp_up(sp);		/* tell PPP we are ready */
>X! 	sp->pp_last_sent = sp->pp_last_recv = SECOND;
>X  	splx(s);
>X  }
>X  
>X***************
>X*** 661,667 ****
>X  {
>X  	i4bisppp_start(&i4bisppp_softc[unit].sc_if);	
>X  }
>X! 
>X  /*---------------------------------------------------------------------------*
>X   *	this routine is called from the HSCX interrupt handler
>X   *	each time a packet is received or transmitted. It should
>X--- 662,683 ----
>X  {
>X  	i4bisppp_start(&i4bisppp_softc[unit].sc_if);	
>X  }
>X! /*---------------------------------------------------------------------------*
>X!  *	THIS should be used instead of last_active_time to implement
>X!  *	an activity timeout mechanism.
>X!  *---------------------------------------------------------------------------*/
>X! time_t
>X! i4bisppp_idletime(int unit)
>X! {
>X! 	struct sppp *sp;
>X! 	time_t now_time, sent_time, recv_time;
>X! 	sp = (struct sppp *) &i4bisppp_softc[unit];
>X! 
>X! 	now_time = SECOND;
>X! 	sent_time = now_time - sp->pp_last_sent;
>X! 	recv_time = now_time - sp->pp_last_recv;
>X! 	return (sent_time<recv_time)? sent_time : recv_time;
>X! }
>X  /*---------------------------------------------------------------------------*
>X   *	this routine is called from the HSCX interrupt handler
>X   *	each time a packet is received or transmitted. It should
>END-of-./usr/src/sys/i4b/driver/i4b_isppp.c.patch
>echo x - ./usr/src/sys/i4b/driver/i4b_isppp.c.orig
>sed 's/^X//' >./usr/src/sys/i4b/driver/i4b_isppp.c.orig << 'END-of-./usr/src/sys/i4b/driver/i4b_isppp.c.orig'
>X/*
>X *   Copyright (c) 1997 Joerg Wunsch. All rights reserved.
>X *
>X *   Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved.
>X *
>X *   Redistribution and use in source and binary forms, with or without
>X *   modification, are permitted provided that the following conditions
>X *   are met:
>X *
>X *   1. Redistributions of source code must retain the above copyright
>X *      notice, this list of conditions and the following disclaimer.
>X *   2. Redistributions in binary form must reproduce the above copyright
>X *      notice, this list of conditions and the following disclaimer in the
>X *      documentation and/or other materials provided with the distribution.
>X *   
>X *   THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
>X *   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>X *   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>X *   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
>X *   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>X *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>X *   OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>X *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>X *   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>X *   OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>X *   SUCH DAMAGE.
>X *
>X *---------------------------------------------------------------------------
>X *
>X *	i4b_isppp.c - isdn4bsd kernel SyncPPP driver
>X *	--------------------------------------------
>X *
>X * 	Uses Serge Vakulenko's sppp backend (originally contributed with
>X *	the "cx" driver for Cronyx's HDLC-in-hardware device).  This driver
>X *	is only the glue between sppp and i4b.
>X *
>X *	$Id: i4b_isppp.c,v 1.1 1998/12/27 21:46:42 phk Exp $
>X *
>X *	last edit-date: [Fri Dec 18 11:47:58 1998]
>X *
>X *---------------------------------------------------------------------------*/
>X
>X#include "i4bisppp.h"
>X#ifdef __FreeBSD__
>X#include "sppp.h"
>X#endif
>X
>X#if NI4BISPPP == 0
>X# error "You need to define `pseudo-device sppp <N>' with options ISPPP"
>X#endif
>X
>X#include <sys/param.h>
>X#include <sys/systm.h>
>X#include <sys/mbuf.h>
>X#include <sys/socket.h>
>X#include <sys/errno.h>
>X#include <sys/ioccom.h>
>X#include <sys/sockio.h>
>X#include <sys/kernel.h>
>X#include <sys/protosw.h>
>X
>X#include <net/if.h>
>X#include <net/if_types.h>
>X#include <net/netisr.h>
>X#include <net/route.h>
>X#ifdef __FreeBSD__
>X#include <net/if_sppp.h>
>X#else
>X#include <i4b/sppp/if_sppp.h>
>X#endif
>X
>X#include <netinet/in.h>
>X#include <netinet/in_systm.h>
>X#include <netinet/in_var.h>
>X#include <netinet/ip.h>
>X
>X#include "bpfilter.h"
>X#if NBPFILTER > 0
>X#include <sys/time.h>
>X#include <net/bpf.h>
>X#endif
>X
>X#ifdef __FreeBSD__
>X#include <machine/i4b_ioctl.h>
>X#include <machine/i4b_cause.h>
>X#else
>X#include <i4b/i4b_ioctl.h>
>X#include <i4b/i4b_cause.h>
>X#endif
>X
>X#include <i4b/include/i4b_global.h>
>X#include <i4b/include/i4b_mbuf.h>
>X#include <i4b/include/i4b_l3l4.h>
>X
>X#include <i4b/layer4/i4b_l4.h>
>X
>X#ifdef __FreeBSD__
>X#define ISPPP_FMT	"isp%d: "
>X#define	ISPPP_ARG(sc)	((sc)->sc_if.if_unit)
>X#define	PDEVSTATIC	static
>X#define IFP2UNIT(ifp)	(ifp)->if_unit
>X		
>X# if __FreeBSD_version >= 300001
>X#  define CALLOUT_INIT(chan)		callout_handle_init(chan)
>X#  define TIMEOUT(fun, arg, chan, tick)	chan = timeout(fun, arg, tick)
>X#  define UNTIMEOUT(fun, arg, chan)	untimeout(fun, arg, chan)
>X#  define IOCTL_CMD_T u_long
>X# else
>X#  define CALLOUT_INIT(chan)		do {} while(0)
>X#  define TIMEOUT(fun, arg, chan, tick)	timeout(fun, arg, tick)
>X#  define UNTIMEOUT(fun, arg, chan)	untimeout(fun, arg)
>X#  define IOCTL_CMD_T int
>X# endif
>X
>X#elif defined __NetBSD__ || defined __OpenBSD__
>X#define	ISPPP_FMT	"%s: "
>X#define	ISPPP_ARG(sc)	((sc)->sc_if.if_xname)
>X#define	PDEVSTATIC	/* not static */
>X#define IOCTL_CMD_T	u_long
>X#define IFP2UNIT(ifp)	((struct i4bisppp_softc *)ifp->if_softc)->sc_unit
>X#else
>X# error "What system are you using?"
>X#endif
>X
>X#ifdef __FreeBSD__
>XPDEVSTATIC void i4bispppattach(void *);
>XPSEUDO_SET(i4bispppattach, i4b_isppp);
>X#else
>XPDEVSTATIC void i4bispppattach __P((void));
>X#endif
>X
>X#define I4BISPPPACCT		1	/* enable accounting messages */
>X#define	I4BISPPPACCTINTVL	2	/* accounting msg interval in secs */
>X#define I4BISPPPDISCDEBUG	1	
>X
>X#define PPP_HDRLEN   		4	/* 4 octetts PPP header length	*/
>X
>Xstruct i4bisppp_softc {
>X	/*
>X	 * struct sppp starts with a struct ifnet, but we gotta allocate
>X	 * more space for it.  NB: do not relocate this union, it must
>X	 * be first in isppp_softc.  The tls and tlf hooks below want to
>X	 * convert a ``struct sppp *'' into a ``struct isppp_softc *''.
>X	 */
>X	union {
>X		struct ifnet scu_if;
>X		struct sppp scu_sp;
>X	} sc_if_un;
>X#define sc_if sc_if_un.scu_if
>X
>X	int	sc_state;	/* state of the interface	*/
>X
>X#ifndef __FreeBSD__
>X	int	sc_unit;	/* unit number for Net/OpenBSD	*/
>X#endif
>X
>X	call_desc_t *sc_cdp;	/* ptr to call descriptor	*/
>X
>X#ifdef I4BISPPPACCT
>X	int sc_iinb;		/* isdn driver # of inbytes	*/
>X	int sc_ioutb;		/* isdn driver # of outbytes	*/
>X	int sc_inb;		/* # of bytes rx'd		*/
>X	int sc_outb;		/* # of bytes tx'd	 	*/
>X	int sc_linb;		/* last # of bytes rx'd		*/
>X	int sc_loutb;		/* last # of bytes tx'd 	*/
>X	int sc_fn;		/* flag, first null acct	*/
>X#endif
>X
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X	struct callout_handle sc_ch;
>X#endif
>X
>X} i4bisppp_softc[NI4BISPPP];
>X
>Xstatic void	i4bisppp_init_linktab(int unit);
>Xstatic int	i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data);
>X
>X#if 0
>Xstatic void	i4bisppp_send(struct ifnet *ifp);
>X#endif
>X
>Xstatic void	i4bisppp_start(struct ifnet *ifp);
>X
>X#if 0 /* never used ??? */
>Xstatic void	i4bisppp_timeout(void *cookie);
>X#endif
>X
>Xstatic void	i4bisppp_tls(struct sppp *sp);
>Xstatic void	i4bisppp_tlf(struct sppp *sp);
>Xstatic void	i4bisppp_state_changed(struct sppp *sp, int new_state);
>Xstatic void	i4bisppp_negotiation_complete(struct sppp *sp);
>Xstatic void	i4bisppp_watchdog(struct ifnet *ifp);
>X
>X/* initialized by L4 */
>X
>Xstatic drvr_link_t i4bisppp_drvr_linktab[NI4BISPPP];
>Xstatic isdn_link_t *isdn_linktab[NI4BISPPP];
>X
>Xenum i4bisppp_states {
>X	ST_IDLE,			/* initialized, ready, idle	*/
>X	ST_DIALING,			/* dialling out to remote	*/
>X	ST_CONNECTED,			/* connected to remote		*/
>X};
>X
>X/*===========================================================================*
>X *			DEVICE DRIVER ROUTINES
>X *===========================================================================*/
>X
>X/*---------------------------------------------------------------------------*
>X *	interface attach routine at kernel boot time
>X *---------------------------------------------------------------------------*/
>XPDEVSTATIC void
>X#ifdef __FreeBSD__
>Xi4bispppattach(void *dummy)
>X#else
>Xi4bispppattach(void)
>X#endif
>X{
>X	struct i4bisppp_softc *sc = i4bisppp_softc;
>X	int i;
>X
>X#ifndef HACK_NO_PSEUDO_ATTACH_MSG
>X	printf("i4bisppp: %d ISDN SyncPPP device(s) attached\n",
>X	       NI4BISPPP);
>X#endif
>X
>X	for(i = 0; i < NI4BISPPP; sc++, i++) {
>X		i4bisppp_init_linktab(i);
>X		
>X		sc->sc_if.if_softc = sc;
>X
>X#ifdef __FreeBSD__		
>X		sc->sc_if.if_name = "isp";
>X#if defined(__FreeBSD_version) && __FreeBSD_version < 300001
>X		sc->sc_if.if_next = NULL;
>X#endif
>X		sc->sc_if.if_unit = i;
>X#else
>X		sprintf(sc->sc_if.if_xname, "isp%d", i);
>X		sc->sc_unit = i;
>X#endif
>X
>X		sc->sc_if.if_mtu = PP_MTU;
>X		sc->sc_if.if_flags = IFF_SIMPLEX | IFF_POINTOPOINT;
>X		sc->sc_if.if_type = IFT_ISDNBASIC;
>X		sc->sc_state = ST_IDLE;
>X
>X		sc->sc_if.if_ioctl = i4bisppp_ioctl;
>X
>X		/* actually initialized by sppp_attach() */
>X		/* sc->sc_if.if_output = sppp_output; */
>X
>X		sc->sc_if.if_start = i4bisppp_start;
>X
>X		sc->sc_if.if_hdrlen = 0;
>X		sc->sc_if.if_addrlen = 0;
>X		sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
>X
>X		sc->sc_if.if_ipackets = 0;
>X		sc->sc_if.if_ierrors = 0;
>X		sc->sc_if.if_opackets = 0;
>X		sc->sc_if.if_oerrors = 0;
>X		sc->sc_if.if_collisions = 0;
>X		sc->sc_if.if_ibytes = 0;
>X		sc->sc_if.if_obytes = 0;
>X		sc->sc_if.if_imcasts = 0;
>X		sc->sc_if.if_omcasts = 0;
>X		sc->sc_if.if_iqdrops = 0;
>X		sc->sc_if.if_noproto = 0;
>X
>X#if I4BISPPPACCT
>X		sc->sc_if.if_timer = 0;	
>X		sc->sc_if.if_watchdog = i4bisppp_watchdog;	
>X		sc->sc_iinb = 0;
>X		sc->sc_ioutb = 0;
>X		sc->sc_inb = 0;
>X		sc->sc_outb = 0;
>X		sc->sc_linb = 0;
>X		sc->sc_loutb = 0;
>X		sc->sc_fn = 1;
>X#endif
>X
>X		sc->sc_if_un.scu_sp.pp_tls = i4bisppp_tls;
>X		sc->sc_if_un.scu_sp.pp_tlf = i4bisppp_tlf;
>X		sc->sc_if_un.scu_sp.pp_con = i4bisppp_negotiation_complete;
>X		sc->sc_if_un.scu_sp.pp_chg = i4bisppp_state_changed;
>X
>X		sppp_attach(&sc->sc_if);
>X		if_attach(&sc->sc_if);
>X
>X#if NBPFILTER > 0
>X#ifdef __FreeBSD__
>X		bpfattach(&sc->sc_if, DLT_PPP, PPP_HDRLEN);
>X		CALLOUT_INIT(&sc->sc_ch);
>X#endif /* __FreeBSD__ */
>X#ifdef __NetBSD__
>X		bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_PPP, sizeof(u_int));
>X#endif
>X#endif		
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	process ioctl
>X *---------------------------------------------------------------------------*/
>Xstatic int
>Xi4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
>X{
>X	struct i4bisppp_softc *sc = ifp->if_softc;
>X#if 0
>X	struct sppp *sp = (struct sppp *)sc;
>X	struct ifaddr *ifa = (struct ifaddr *) data;
>X	struct ifreq *ifr = (struct ifreq *) data;
>X#endif
>X
>X	int error;
>X
>X	error = sppp_ioctl(&sc->sc_if, cmd, data);
>X	if (error)
>X		return error;
>X
>X	switch(cmd) {
>X	case SIOCSIFFLAGS:
>X#if 0 /* never used ??? */
>X		x = splimp();
>X		if ((ifp->if_flags & IFF_UP) == 0)
>X			UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
>X		splx(x);
>X#endif
>X		break;
>X	}
>X
>X	return 0;
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	start output to ISDN B-channel
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_start(struct ifnet *ifp)
>X{
>X	struct i4bisppp_softc *sc = ifp->if_softc;
>X	struct mbuf *m;
>X	int s;
>X	int unit = IFP2UNIT(ifp);
>X
>X	if (sppp_isempty(ifp))
>X		return;
>X
>X	if(sc->sc_state != ST_CONNECTED)
>X		return;
>X
>X	s = splimp();
>X	/*ifp->if_flags |= IFF_OACTIVE; - need to clear this somewhere */
>X	splx(s);
>X
>X	while ((m = sppp_dequeue(&sc->sc_if)) != NULL)
>X	{
>X
>X#if NBPFILTER > 0
>X#ifdef __FreeBSD__
>X		if (ifp->if_bpf)
>X			bpf_mtap(ifp, m);
>X#endif /* __FreeBSD__ */
>X
>X#ifdef __NetBSD__
>X		if (ifp->if_bpf)
>X			bpf_mtap(ifp->if_bpf, m);
>X#endif
>X#endif /* NBPFILTER > 0 */
>X
>X		microtime(&ifp->if_lastchange);
>X
>X		IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
>X
>X		sc->sc_if.if_obytes += m->m_pkthdr.len;
>X		sc->sc_outb += m->m_pkthdr.len;
>X		sc->sc_if.if_opackets++;
>X	}
>X	isdn_linktab[unit]->bch_tx_start(isdn_linktab[unit]->unit,
>X					 isdn_linktab[unit]->channel);
>X}
>X
>X#ifdef I4BISPPPACCT
>X/*---------------------------------------------------------------------------*
>X *	watchdog routine
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_watchdog(struct ifnet *ifp)
>X{
>X	struct i4bisppp_softc *sc = ifp->if_softc;
>X	int unit = IFP2UNIT(ifp);
>X	bchan_statistics_t bs;
>X	
>X	(*isdn_linktab[unit]->bch_stat)
>X		(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
>X
>X	sc->sc_ioutb += bs.outbytes;
>X	sc->sc_iinb += bs.inbytes;
>X	
>X	if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
>X	{
>X		int ri = (sc->sc_iinb - sc->sc_linb)/I4BISPPPACCTINTVL;
>X		int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BISPPPACCTINTVL;
>X
>X		if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
>X			sc->sc_fn = 0;
>X		else
>X			sc->sc_fn = 1;
>X			
>X		sc->sc_linb = sc->sc_iinb;
>X		sc->sc_loutb = sc->sc_ioutb;
>X
>X		i4b_l4_accounting(BDRV_ISPPP, unit, ACCT_DURING,
>X			 sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
>X 	}
>X	sc->sc_if.if_timer = I4BISPPPACCTINTVL; 	
>X
>X#if 0 /* old stuff, keep it around */
>X	printf(ISPPP_FMT "transmit timeout\n", ISPPP_ARG(sc));
>X	i4bisppp_start(ifp);
>X#endif
>X}
>X#endif /* I4BISPPPACCT */
>X
>X/*
>X *===========================================================================*
>X *			SyncPPP layer interface routines
>X *===========================================================================*
>X */
>X
>X#if 0 /* never used ??? */
>X/*---------------------------------------------------------------------------*
>X *	just an alias for i4bisppp_tls, but of type timeout_t
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_timeout(void *cookie)
>X{
>X	i4bisppp_tls((struct sppp *)cookie);
>X}
>X#endif
>X
>X/*---------------------------------------------------------------------------*
>X *	PPP this-layer-started action
>X *---------------------------------------------------------------------------*
>X */
>Xstatic void
>Xi4bisppp_tls(struct sppp *sp)
>X{
>X	struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
>X	struct ifnet *ifp = (struct ifnet *)sp;
>X
>X	if(sc->sc_state == ST_CONNECTED)
>X		return;
>X
>X	i4b_l4_dialout(BDRV_ISPPP, IFP2UNIT(ifp));
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	PPP this-layer-finished action
>X *---------------------------------------------------------------------------*
>X */
>Xstatic void
>Xi4bisppp_tlf(struct sppp *sp)
>X{
>X	struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
>X/*	call_desc_t *cd = sc->sc_cdp;	*/
>X        struct ifnet *ifp = (struct ifnet *)sp;	
>X	
>X	if(sc->sc_state != ST_CONNECTED)
>X		return;
>X
>X#if 0 /* never used ??? */
>X	UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
>X#endif
>X
>X	i4b_l4_drvrdisc(BDRV_ISPPP, IFP2UNIT(ifp));
>X}
>X/*---------------------------------------------------------------------------*
>X *	PPP interface phase change
>X *---------------------------------------------------------------------------*
>X */
>Xstatic void
>Xi4bisppp_state_changed(struct sppp *sp, int new_state)
>X{
>X	struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
>X	
>X	i4b_l4_ifstate_changed(sc->sc_cdp, new_state);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	PPP control protocol negotiation complete (run ip-up script now)
>X *---------------------------------------------------------------------------*
>X */
>Xstatic void
>Xi4bisppp_negotiation_complete(struct sppp *sp)
>X{
>X	struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
>X	
>X	i4b_l4_negcomplete(sc->sc_cdp);
>X}
>X
>X/*===========================================================================*
>X *			ISDN INTERFACE ROUTINES
>X *===========================================================================*/
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from L4 handler at connect time
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_connect(int unit, void *cdp)
>X{
>X	struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
>X	struct sppp *sp = &sc->sc_if_un.scu_sp;
>X	int s = splimp();
>X
>X	sc->sc_cdp = (call_desc_t *)cdp;
>X	sc->sc_state = ST_CONNECTED;
>X
>X#if I4BISPPPACCT
>X	sc->sc_iinb = 0;
>X	sc->sc_ioutb = 0;
>X	sc->sc_inb = 0;
>X	sc->sc_outb = 0;
>X	sc->sc_linb = 0;
>X	sc->sc_loutb = 0;
>X	sc->sc_if.if_timer = I4BISPPPACCTINTVL;
>X#endif
>X	
>X#if 0 /* never used ??? */
>X	UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
>X#endif
>X
>X	sp->pp_up(sp);		/* tell PPP we are ready */
>X
>X	splx(s);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from L4 handler at disconnect time
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_disconnect(int unit, void *cdp)
>X{
>X	call_desc_t *cd = (call_desc_t *)cdp;
>X	struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
>X	struct sppp *sp = &sc->sc_if_un.scu_sp;
>X
>X	int s = splimp();
>X
>X	/* new stuff to check that the active channel is being closed */
>X	if (cd != sc->sc_cdp)
>X	{
>X#ifdef I4BISPPPDISCDEBUG		
>X		printf("i4bisppp_disconnect: isppp%d channel%d not active\n",
>X			cd->driver_unit, cd->channelid);
>X#endif
>X		splx(s);
>X		return;
>X	}
>X
>X#if I4BISPPPACCT
>X	sc->sc_if.if_timer = 0;
>X#endif
>X
>X	i4b_l4_accounting(BDRV_ISPPP, unit, ACCT_FINAL,
>X		 sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
>X	
>X	if (sc->sc_state == ST_CONNECTED)
>X	{
>X#if 0 /* never used ??? */
>X		UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
>X#endif
>X		sc->sc_cdp = (call_desc_t *)0;	
>X		/* do thhis here because pp_down calls i4bisppp_tlf */
>X		sc->sc_state = ST_IDLE;
>X		sp->pp_down(sp);	/* tell PPP we have hung up */
>X	}
>X
>X	splx(s);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is used to give a feedback from userland demon
>X *	in case of dial problems
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_dialresponse(int unit, int status)
>X{
>X/*	struct i4bisppp_softc *sc = &i4bisppp_softc[unit];	*/
>X}
>X	
>X/*---------------------------------------------------------------------------*
>X *	interface up/down
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_updown(int unit, int updown)
>X{
>X	/* could probably do something useful here */
>X}
>X	
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from the HSCX interrupt handler
>X *	when a new frame (mbuf) has been received and was put on
>X *	the rx queue.
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_rx_data_rdy(int unit)
>X{
>X	struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
>X	struct mbuf *m;
>X	int s;
>X	
>X	if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
>X		return;
>X
>X	m->m_pkthdr.rcvif = &sc->sc_if;
>X	m->m_pkthdr.len = m->m_len;
>X
>X	microtime(&sc->sc_if.if_lastchange);
>X
>X	sc->sc_if.if_ipackets++;
>X	sc->sc_if.if_ibytes += m->m_pkthdr.len;
>X
>X#if I4BISPPPACCT
>X	sc->sc_inb += m->m_pkthdr.len;
>X#endif
>X	
>X#ifdef I4BISPPPDEBUG
>X	printf("i4bisppp_rx_data_ready: received packet!\n");
>X#endif
>X
>X#if NBPFILTER > 0
>X
>X#ifdef __FreeBSD__	
>X	if(sc->sc_if.if_bpf)
>X		bpf_mtap(&sc->sc_if, m);
>X#endif /* __FreeBSD__ */
>X
>X#ifdef __NetBSD__
>X	if(sc->sc_if.if_bpf)
>X		bpf_mtap(sc->sc_if.if_bpf, m);
>X#endif
>X
>X#endif /* NBPFILTER > 0 */
>X
>X	s = splimp();
>X
>X	sppp_input(&sc->sc_if, m);
>X
>X	splx(s);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from the HSCX interrupt handler
>X *	when the last frame has been sent out and there is no
>X *	further frame (mbuf) in the tx queue.
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_tx_queue_empty(int unit)
>X{
>X	i4bisppp_start(&i4bisppp_softc[unit].sc_if);	
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	this routine is called from the HSCX interrupt handler
>X *	each time a packet is received or transmitted. It should
>X *	be used to implement an activity timeout mechanism.
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_activity(int unit, int rxtx)
>X{
>X	i4bisppp_softc[unit].sc_cdp->last_active_time = SECOND;
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	return this drivers linktab address
>X *---------------------------------------------------------------------------*/
>Xdrvr_link_t *
>Xi4bisppp_ret_linktab(int unit)
>X{
>X	return(&i4bisppp_drvr_linktab[unit]);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	setup the isdn_linktab for this driver
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4bisppp_set_linktab(int unit, isdn_link_t *ilt)
>X{
>X	isdn_linktab[unit] = ilt;
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	initialize this drivers linktab
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4bisppp_init_linktab(int unit)
>X{
>X	i4bisppp_drvr_linktab[unit].unit = unit;
>X	i4bisppp_drvr_linktab[unit].bch_rx_data_ready = i4bisppp_rx_data_rdy;
>X	i4bisppp_drvr_linktab[unit].bch_tx_queue_empty = i4bisppp_tx_queue_empty;
>X	i4bisppp_drvr_linktab[unit].bch_activity = i4bisppp_activity;
>X	i4bisppp_drvr_linktab[unit].line_connected = i4bisppp_connect;
>X	i4bisppp_drvr_linktab[unit].line_disconnected = i4bisppp_disconnect;
>X	i4bisppp_drvr_linktab[unit].dial_response = i4bisppp_dialresponse;	
>X	i4bisppp_drvr_linktab[unit].updown_ind = i4bisppp_updown;	
>X}
>X
>X/*===========================================================================*/
>END-of-./usr/src/sys/i4b/driver/i4b_isppp.c.orig
>echo c - ./usr/src/sys/i4b/layer4
>mkdir -p ./usr/src/sys/i4b/layer4 > /dev/null 2>&1
>echo x - ./usr/src/sys/i4b/layer4/i4b_l4.c
>sed 's/^X//' >./usr/src/sys/i4b/layer4/i4b_l4.c << 'END-of-./usr/src/sys/i4b/layer4/i4b_l4.c'
>X/*
>X * Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved.
>X *
>X * Redistribution and use in source and binary forms, with or without
>X * modification, are permitted provided that the following conditions
>X * are met:
>X * 1. Redistributions of source code must retain the above copyright
>X *    notice, this list of conditions and the following disclaimer.
>X * 2. Redistributions in binary form must reproduce the above copyright
>X *    notice, this list of conditions and the following disclaimer in the
>X *    documentation and/or other materials provided with the distribution.
>X *
>X * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
>X * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>X * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>X * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
>X * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>X * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>X * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>X * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>X * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>X * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>X * SUCH DAMAGE.
>X *
>X *---------------------------------------------------------------------------
>X *
>X *	i4b_l4.c - kernel interface to userland
>X *	-----------------------------------------
>X *
>X *	$Id: i4b_l4.c,v 1.1 1998/12/27 21:46:52 phk Exp $ 
>X *
>X *      last edit-date: [Sat Dec  5 18:35:16 1998]
>X *
>X *---------------------------------------------------------------------------*/
>X
>X#include "i4b.h"
>X#include "i4bipr.h"
>X#include "i4bisppp.h"
>X#include "i4brbch.h"
>X#include "i4btel.h"
>X
>X#if NI4B > 0
>X
>X#include <sys/param.h>
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#include <sys/ioccom.h>
>X#else
>X#include <sys/ioctl.h>
>X#endif
>X#include <sys/kernel.h>
>X#include <sys/systm.h>
>X#include <sys/conf.h>
>X#include <sys/mbuf.h>
>X#include <sys/proc.h>
>X#include <sys/fcntl.h>
>X#include <sys/socket.h>
>X#include <net/if.h>
>X
>X#ifdef __FreeBSD__
>X#include <machine/i4b_debug.h>
>X#include <machine/i4b_ioctl.h>
>X#include <machine/i4b_cause.h>
>X#else
>X#include <i4b/i4b_debug.h>
>X#include <i4b/i4b_ioctl.h>
>X#include <i4b/i4b_cause.h>
>X#endif
>X
>X#include <i4b/include/i4b_global.h>
>X#include <i4b/include/i4b_l3l4.h>
>X#include <i4b/include/i4b_mbuf.h>
>X#include <i4b/layer3/i4b_l3.h>
>X#include <i4b/layer4/i4b_l4.h>
>X
>Xunsigned int i4b_l4_debug = L4_DEBUG_DEFAULT;
>X
>Xstruct ctrl_type_desc ctrl_types[CTRL_NUMTYPES] = { { NULL, NULL} };
>X
>Xstatic int i4b_link_bchandrvr(call_desc_t *cd);
>Xstatic void i4b_unlink_bchandrvr(call_desc_t *cd);
>Xstatic void i4b_l4_setup_timeout(call_desc_t *cd);
>Xstatic time_t i4b_get_idletime(call_desc_t *cd);
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_PDEACT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_pdeact(int controller, int numactive)
>X{
>X	struct mbuf *m;
>X	int i;
>X	call_desc_t *cd;
>X	
>X	for(i=0; i < N_CALL_DESC; i++)
>X	{
>X		if((call_desc[i].cdid != CDID_UNUSED)				  &&
>X		   (ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
>X		   (ctrl_desc[call_desc[i].controller].unit == controller))
>X		{
>X			cd = &call_desc[i];
>X			
>X			if(cd->timeout_active)
>X			{
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X				untimeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, cd->idle_timeout_handle);	
>X#else
>X				untimeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd);	
>X#endif
>X			}
>X			
>X			if(cd->dlt != NULL)
>X			{
>X				(*cd->dlt->line_disconnected)(cd->driver_unit, (void *)cd);
>X				i4b_unlink_bchandrvr(cd);
>X			}
>X		
>X			if((cd->channelid == CHAN_B1) || (cd->channelid == CHAN_B2))
>X			{
>X				ctrl_desc[cd->controller].bch_state[cd->channelid] = BCH_ST_FREE;
>X			}
>X
>X			cd->cdid = CDID_UNUSED;
>X		}
>X	}
>X	
>X	if((m = i4b_Dgetmbuf(sizeof(msg_pdeact_ind_t))) != NULL)
>X	{
>X		msg_pdeact_ind_t *md = (msg_pdeact_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_PDEACT_IND;
>X		md->header.cdid = -1;
>X
>X		md->controller = controller;
>X		md->numactive = numactive;
>X
>X		i4bputqueue_hipri(m);		/* URGENT !!! */
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_L12STAT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_l12stat(int controller, int layer, int state)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_l12stat_ind_t))) != NULL)
>X	{
>X		msg_l12stat_ind_t *md = (msg_l12stat_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_L12STAT_IND;
>X		md->header.cdid = -1;
>X
>X		md->controller = controller;
>X		md->layer = layer;
>X		md->state = state;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_TEIASG_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_teiasg(int controller, int tei)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_teiasg_ind_t))) != NULL)
>X	{
>X		msg_teiasg_ind_t *md = (msg_teiasg_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_TEIASG_IND;
>X		md->header.cdid = -1;
>X
>X		md->controller = controller;
>X		md->tei = ctrl_desc[controller].tei;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_DIALOUT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_dialout(int driver, int driver_unit)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_dialout_ind_t))) != NULL)
>X	{
>X		msg_dialout_ind_t *md = (msg_dialout_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_DIALOUT_IND;
>X		md->header.cdid = -1;
>X
>X		md->driver = driver;
>X		md->driver_unit = driver_unit;	
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_NEGOTIATION_COMPL message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_negcomplete(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_negcomplete_ind_t))) != NULL)
>X	{
>X		msg_negcomplete_ind_t *md = (msg_negcomplete_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_NEGCOMP_IND;
>X		md->header.cdid = cd->cdid;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_IFSTATE_CHANGED_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_ifstate_changed(call_desc_t *cd, int new_state)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_ifstatechg_ind_t))) != NULL)
>X	{
>X		msg_ifstatechg_ind_t *md = (msg_ifstatechg_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_IFSTATE_CHANGED_IND;
>X		md->header.cdid = cd->cdid;
>X		md->state = new_state;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_DRVRDISC_REQ message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_drvrdisc(int driver, int driver_unit)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_drvrdisc_req_t))) != NULL)
>X	{
>X		msg_drvrdisc_req_t *md = (msg_drvrdisc_req_t *)m->m_data;
>X
>X		md->header.type = MSG_DRVRDISC_REQ;
>X		md->header.cdid = -1;
>X
>X		md->driver = driver;
>X		md->driver_unit = driver_unit;	
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_ACCT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_accounting(int driver, int driver_unit, int accttype, int ioutbytes,
>X		int iinbytes, int ro, int ri, int outbytes, int inbytes)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_accounting_ind_t))) != NULL)
>X	{
>X		msg_accounting_ind_t *md = (msg_accounting_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_ACCT_IND;
>X		md->header.cdid = -1;
>X
>X		md->driver = driver;
>X		md->driver_unit = driver_unit;	
>X
>X		md->accttype = accttype;
>X		md->ioutbytes = ioutbytes;
>X		md->iinbytes = iinbytes;
>X		md->outbps = ro;
>X		md->inbps = ri;
>X		md->outbytes = outbytes;
>X		md->inbytes = inbytes;
>X		
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_CONNECT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_connect_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_connect_ind_t))) != NULL)
>X	{
>X		msg_connect_ind_t *mp = (msg_connect_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_CONNECT_IND;
>X		mp->header.cdid = cd->cdid;
>X
>X		mp->controller = cd->controller;
>X		mp->channel = cd->channelid;
>X		mp->bprot = cd->bprot;
>X
>X		cd->dir = DIR_INCOMING;
>X
>X		if(strlen(cd->dst_telno) > 0)
>X			strcpy(mp->dst_telno, cd->dst_telno);
>X		else
>X			strcpy(mp->dst_telno, TELNO_EMPTY);
>X
>X		if(strlen(cd->src_telno) > 0)
>X			strcpy(mp->src_telno, cd->src_telno);
>X		else
>X			strcpy(mp->src_telno, TELNO_EMPTY);
>X			
>X		strcpy(mp->display, cd->display);
>X
>X		mp->scr_ind = cd->scr_ind;
>X		
>X		T400_start(cd);
>X		
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_CONNECT_ACTIVE_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_connect_active_ind(call_desc_t *cd)
>X{
>X	int s;
>X	struct mbuf *m;
>X
>X	s = SPLI4B();
>X
>X	cd->last_active_time = cd->connect_time = SECOND;
>X
>X	DBGL4(L4_TIMO, "i4b_l4_connect_active_ind", ("last_active/connect_time=%ld\n", (long)cd->connect_time));
>X	
>X	i4b_link_bchandrvr(cd);
>X
>X	(*cd->dlt->line_connected)(cd->driver_unit, (void *)cd);
>X
>X	i4b_l4_setup_timeout(cd);
>X	
>X	splx(s);	
>X	
>X	if((m = i4b_Dgetmbuf(sizeof(msg_connect_active_ind_t))) != NULL)
>X	{
>X		msg_connect_active_ind_t *mp = (msg_connect_active_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_CONNECT_ACTIVE_IND;
>X		mp->header.cdid = cd->cdid;
>X		mp->controller = cd->controller;
>X		mp->channel = cd->channelid;
>X		if(cd->datetime[0] != '\0')
>X			strcpy(mp->datetime, cd->datetime);
>X		else
>X			mp->datetime[0] = '\0';
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_DISCONNECT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_disconnect_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if(cd->timeout_active)
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X		untimeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, cd->idle_timeout_handle);	
>X#else
>X		untimeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd);	
>X#endif
>X
>X	if(cd->dlt != NULL)
>X	{
>X		(*cd->dlt->line_disconnected)(cd->driver_unit, (void *)cd);
>X		i4b_unlink_bchandrvr(cd);
>X	}
>X
>X	if((cd->channelid == CHAN_B1) || (cd->channelid == CHAN_B2))
>X	{
>X		ctrl_desc[cd->controller].bch_state[cd->channelid] = BCH_ST_FREE;
>X	}
>X	else
>X	{
>X		/* no error, might be hunting call for callback */
>X		DBGL4(L4_MSG, "i4b_l4_disconnect_ind", ("channel free not B1/B2 but %d!\n", cd->channelid));
>X	}
>X	
>X	if((m = i4b_Dgetmbuf(sizeof(msg_disconnect_ind_t))) != NULL)
>X	{
>X		msg_disconnect_ind_t *mp = (msg_disconnect_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_DISCONNECT_IND;
>X		mp->header.cdid = cd->cdid;
>X		mp->cause = cd->cause_in;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_IDLE_TIMEOUT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_idle_timeout_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_idle_timeout_ind_t))) != NULL)
>X	{
>X		msg_idle_timeout_ind_t *mp = (msg_idle_timeout_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_IDLE_TIMEOUT_IND;
>X		mp->header.cdid = cd->cdid;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_CHARGING_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_charging_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_charging_ind_t))) != NULL)
>X	{
>X		msg_charging_ind_t *mp = (msg_charging_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_CHARGING_IND;
>X		mp->header.cdid = cd->cdid;
>X		mp->units_type = cd->units_type;
>X
>X/*XXX*/		if(mp->units_type == CHARGE_CALC)
>X			mp->units = cd->cunits;
>X		else
>X			mp->units = cd->units;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_STATUS_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_status_ind(call_desc_t *cd)
>X{
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_ALERT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_alert_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_alert_ind_t))) != NULL)
>X	{
>X		msg_alert_ind_t *mp = (msg_alert_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_ALERT_IND;
>X		mp->header.cdid = cd->cdid;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_INFO_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_info_ind(call_desc_t *cd)
>X{
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_INFO_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_proceeding_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_proceeding_ind_t))) != NULL)
>X	{
>X		msg_proceeding_ind_t *mp = (msg_proceeding_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_PROCEEDING_IND;
>X		mp->header.cdid = cd->cdid;
>X		mp->controller = cd->controller;
>X		mp->channel = cd->channelid;
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	link a driver(unit) to a B-channel(controller,unit,channel)
>X *---------------------------------------------------------------------------*/
>Xstatic int
>Xi4b_link_bchandrvr(call_desc_t *cd)
>X{
>X	int t = ctrl_desc[cd->controller].ctrl_type;
>X	
>X	if(t < 0 || t >= CTRL_NUMTYPES || ctrl_types[t].get_linktab == NULL)
>X	{
>X			cd->ilt = NULL;
>X	}
>X	else
>X	{
>X		cd->ilt = ctrl_types[t].get_linktab(
>X			ctrl_desc[cd->controller].unit,
>X			cd->channelid);
>X	}
>X
>X	switch(cd->driver)
>X	{
>X#if NI4BRBCH > 0
>X		case BDRV_RBCH:
>X			cd->dlt = rbch_ret_linktab(cd->driver_unit);
>X			break;
>X#endif
>X		
>X#if NI4BTEL > 0
>X		case BDRV_TEL:
>X			cd->dlt = tel_ret_linktab(cd->driver_unit);
>X			break;
>X#endif
>X
>X#if NI4BIPR > 0
>X		case BDRV_IPR:
>X			cd->dlt = ipr_ret_linktab(cd->driver_unit);
>X			break;
>X#endif
>X
>X#if NI4BISPPP > 0
>X		case BDRV_ISPPP:
>X			cd->dlt = i4bisppp_ret_linktab(cd->driver_unit);
>X			break;
>X#endif
>X
>X		default:
>X			cd->dlt = NULL;
>X			break;
>X	}
>X
>X	if(cd->dlt == NULL || cd->ilt == NULL)
>X		return(-1);
>X
>X	if(t >= 0 && t < CTRL_NUMTYPES && ctrl_types[t].set_linktab != NULL)
>X	{
>X		ctrl_types[t].set_linktab(
>X				ctrl_desc[cd->controller].unit,
>X				cd->channelid,
>X				cd->dlt);
>X	}
>X
>X	switch(cd->driver)
>X	{
>X#if NI4BRBCH > 0
>X		case BDRV_RBCH:
>X			rbch_set_linktab(cd->driver_unit, cd->ilt);
>X			break;
>X#endif
>X
>X#if NI4BTEL > 0
>X		case BDRV_TEL:
>X			tel_set_linktab(cd->driver_unit, cd->ilt);
>X			break;
>X#endif
>X
>X#if NI4BIPR > 0
>X		case BDRV_IPR:
>X			ipr_set_linktab(cd->driver_unit, cd->ilt);
>X			break;
>X#endif
>X
>X#if NI4BISPPP > 0
>X		case BDRV_ISPPP:
>X			i4bisppp_set_linktab(cd->driver_unit, cd->ilt);
>X			break;
>X#endif
>X		default:
>X			return(0);
>X			break;
>X	}
>X
>X	/* activate B channel */
>X		
>X	(*cd->ilt->bch_config)(ctrl_desc[cd->controller].unit,
>X				cd->channelid, cd->bprot, 1);
>X
>X	return(0);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	unlink a driver(unit) from a B-channel(controller,unit,channel)
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4b_unlink_bchandrvr(call_desc_t *cd)
>X{
>X	int t = ctrl_desc[cd->controller].ctrl_type;
>X
>X	if(t < 0 || t >= CTRL_NUMTYPES || ctrl_types[t].get_linktab == NULL)
>X	{
>X		cd->ilt = NULL;
>X		return;
>X	}
>X	else
>X	{
>X		cd->ilt = ctrl_types[t].get_linktab(
>X				ctrl_desc[cd->controller].unit,
>X				cd->channelid);
>X	}
>X	
>X	/* deactivate B channel */
>X		
>X	(*cd->ilt->bch_config)(ctrl_desc[cd->controller].unit,
>X				cd->channelid, cd->bprot, 0);
>X} 
>X
>X/*---------------------------------------------------------------------------
>X
>X	How shorthold mode works for OUTGOING connections
>X	=================================================
>X
>X	|<---- unchecked-window ------->|<-checkwindow->|<-safetywindow>|
>X
>Xidletime_state:      IST_NONCHK             IST_CHECK       IST_SAFE	
>X	
>X	|				|		|		|
>X  time>>+-------------------------------+---------------+---------------+-...
>X	|				|		|		|
>X	|				|<--idle_time-->|<--earlyhup--->|
>X	|<-----------------------unitlen------------------------------->|
>X
>X	
>X	  unitlen - specifies the time a charging unit lasts
>X	idle_time - specifies the thime the line must be idle at the
>X		    end of the unit to be elected for hangup
>X	 earlyhup - is the beginning of a timing safety zone before the
>X		    next charging unit starts
>X
>X	The algorithm works as follows: lets assume the unitlen is 100
>X	secons, idle_time is 40 seconds and earlyhup is 10 seconds.
>X	The line then must be idle 50 seconds after the begin of the
>X	current unit and it must then be quiet for 40 seconds. if it
>X	has been quiet for this 40 seconds, the line is closed 10
>X	seconds before the next charging unit starts. In case there was
>X	any traffic within the idle_time, the line is not closed.
>X	It does not matter whether there was any traffic between second
>X	0 and second 50 or not.
>X
>X
>X	How shorthold mode works for INCOMING connections
>X	=================================================
>X
>X	it is just possible to specify a maximum idle time for incoming
>X	connections, after this time of no activity on the line the line
>X	is closed.
>X	
>X---------------------------------------------------------------------------*/	
>X
>X/*---------------------------------------------------------------------------*
>X *	B channel idle check timeout setup
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4b_l4_setup_timeout(call_desc_t *cd)
>X{
>X	cd->timeout_active = 0;
>X	cd->idletime_state = IST_IDLE;
>X	
>X	if((cd->dir == DIR_INCOMING) && (cd->max_idle_time > 0))
>X	{
>X		/* incoming call: simple max idletime check */
>X	
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X		cd->idle_timeout_handle =
>X#endif
>X		timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz/2);
>X		cd->timeout_active = 1;
>X		DBGL4(L4_TIMO, "i4b_l4_setup_timeout", ("%ld: incoming-call, setup max_idle_time to %ld\n", (long)SECOND, (long)cd->max_idle_time));
>X	}
>X	else if((cd->dir == DIR_OUTGOING) && (cd->idle_time > 0))
>X	{
>X		/* outgoing call */
>X		
>X		if((cd->idle_time > 0) && (cd->unitlen_time == 0))
>X		{
>X			/* outgoing call: simple max idletime check */
>X			
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X			cd->idle_timeout_handle =
>X#endif
>X			timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz/2);
>X			cd->timeout_active = 1;
>X			DBGL4(L4_TIMO, "i4b_l4_setup_timeout", ("%ld: outgoing-call, setup idle_time to %ld\n", (long)SECOND, (long)cd->idle_time));
>X		}
>X		else if((cd->unitlen_time > 0) && (cd->unitlen_time > (cd->idle_time + cd->earlyhup_time)))
>X		{
>X			/* outgoing call: full shorthold mode check */
>X			
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X			cd->idle_timeout_handle =
>X#endif
>X			timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz*(cd->unitlen_time - (cd->idle_time + cd->earlyhup_time)));
>X			cd->timeout_active = 1;
>X			cd->idletime_state = IST_NONCHK;
>X			DBGL4(L4_TIMO, "i4b_l4_setup_timeout", ("%ld: outgoing-call, start %ld sec nocheck window\n", 
>X				(long)SECOND, (long)(cd->unitlen_time - (cd->idle_time + cd->earlyhup_time))));
>X
>X			if(cd->aocd_flag == 0)
>X			{
>X				cd->units_type = CHARGE_CALC;
>X				cd->cunits++;
>X				i4b_l4_charging_ind(cd);
>X			}
>X		}
>X		else
>X		{
>X			/* parms somehow got wrong .. */
>X			
>X			DBGL4(L4_ERR, "i4b_l4_setup_timeout", ("%ld: ERROR: idletime[%ld]+earlyhup[%ld] > unitlength[%ld]!\n",
>X				(long)SECOND, (long)cd->idle_time, (long)cd->earlyhup_time, (long)cd->unitlen_time));
>X		}
>X	}
>X	else
>X	{
>X		DBGL4(L4_TIMO, "i4b_l4_setup_timeout", ("no idle_timeout configured\n"));
>X	}
>X}
>X
>Xstatic time_t
>Xi4b_get_idletime(call_desc_t *cd)
>X{
>X	time_t t;
>X	switch (cd->driver) {
>X#if NI4BISPPP > 0
>X		case BDRV_ISPPP:
>X			return i4bisppp_idletime(cd->driver_unit);
>X		break;
>X#endif
>X		default:
>X			return SECOND - cd->last_active_time;
>X		break;
>X	}
>X}
>X/*---------------------------------------------------------------------------*
>X *	B channel idle check timeout function
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_idle_check(call_desc_t *cd)
>X{
>X	int s;
>X
>X	if(cd->cdid == CDID_UNUSED)
>X		return;
>X	
>X	s = SPLI4B();
>X
>X	/* failsafe */
>X
>X	if(cd->timeout_active == 0)
>X	{
>X		DBGL4(L4_ERR, "i4b_idle_check", ("ERROR: timeout_active == 0 !!!\n"));
>X	}
>X	else
>X	{	
>X		cd->timeout_active = 0;
>X	}
>X	
>X	/* incoming connections, simple idletime check */
>X
>X	if(cd->dir == DIR_INCOMING)
>X	{
>X		if(i4b_get_idletime(cd) >= cd->max_idle_time)
>X		{
>X			DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: incoming-call, line idle timeout, disconnecting!\n", (long)SECOND));
>X			(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X					(CAUSET_I4B << 8) | CAUSE_I4B_NORMAL);
>X			i4b_l4_idle_timeout_ind(cd);
>X		}
>X		else
>X		{
>X			DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: incoming-call, activity, last_active=%ld, max_idle=%ld\n", (long)SECOND, (long)cd->last_active_time, (long)cd->max_idle_time));
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X			cd->idle_timeout_handle =
>X#endif
>X			timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz/2);
>X			cd->timeout_active = 1;
>X		}
>X	}
>X
>X	/* outgoing connections */
>X
>X	else if(cd->dir == DIR_OUTGOING)
>X	{
>X
>X		/* simple idletime calculation */
>X
>X		if((cd->idle_time > 0) && (cd->unitlen_time == 0))
>X		{
>X			if(i4b_get_idletime(cd) >= cd->idle_time)
>X			{
>X				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call-st, idle timeout, disconnecting!\n", (long)SECOND));
>X				(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X					(CAUSET_I4B << 8) | CAUSE_I4B_NORMAL);
>X				i4b_l4_idle_timeout_ind(cd);
>X			}
>X			else
>X			{
>X				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call-st, activity, last_active=%ld, max_idle=%ld\n",
>X								(long)SECOND, (long)cd->last_active_time, (long)cd->idle_time));
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X			cd->idle_timeout_handle =
>X#endif
>X				timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz/2);
>X				cd->timeout_active = 1;
>X			}
>X		}
>X
>X		/* full shorthold mode calculation */
>X
>X		else if((cd->unitlen_time > 0) && (cd->unitlen_time > (cd->idle_time + cd->earlyhup_time)))
>X		{
>X			switch(cd->idletime_state)
>X			{
>X			case IST_NONCHK:	/* end of non-check time */
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X				cd->idle_timeout_handle =
>X#endif
>X				timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz*(cd->idle_time));
>X				cd->idletimechk_start = SECOND;
>X				cd->idletime_state = IST_CHECK;
>X				cd->timeout_active = 1;
>X				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call, idletime check window reached!\n", (long)SECOND));
>X				break;
>X
>X			case IST_CHECK:		/* end of idletime chk */
>X				if((cd->last_active_time > cd->idletimechk_start) &&
>X				   (cd->last_active_time <= SECOND))
>X				{	/* activity detected */
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X					cd->idle_timeout_handle =
>X#endif
>X					timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz*(cd->earlyhup_time));
>X					cd->timeout_active = 1;
>X					cd->idletime_state = IST_SAFE;
>X					DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call, activity at %ld, wait earlyhup-end\n", (long)SECOND, (long)cd->last_active_time));
>X				}
>X				else
>X				{	/* no activity, hangup */
>X					DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call, idle timeout, last activity at %ld\n", (long)SECOND, (long)cd->last_active_time));
>X					(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X						(CAUSET_I4B << 8) | CAUSE_I4B_NORMAL);
>X					i4b_l4_idle_timeout_ind(cd);
>X					cd->idletime_state = IST_IDLE;
>X				}
>X				break;
>X
>X			case IST_SAFE:	/* end of earlyhup time */
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X				cd->idle_timeout_handle =
>X#endif
>X				timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz*(cd->unitlen_time - (cd->idle_time+cd->earlyhup_time)));
>X				cd->timeout_active = 1;
>X				cd->idletime_state = IST_NONCHK;
>X
>X				if(cd->aocd_flag == 0)
>X				{
>X					cd->units_type = CHARGE_CALC;
>X					cd->cunits++;
>X					i4b_l4_charging_ind(cd);
>X				}
>X				
>X				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call, earlyhup end, wait for idletime start\n", (long)SECOND));
>X				break;
>X
>X			default:
>X				DBGL4(L4_ERR, "i4b_idle_check", ("outgoing-call: invalid idletime_state value!\n"));
>X				cd->idletime_state = IST_IDLE;
>X				break;
>X			}
>X		}
>X	}
>X	splx(s);
>X}
>X
>X#endif /* NI4B > 0 */
>END-of-./usr/src/sys/i4b/layer4/i4b_l4.c
>echo x - ./usr/src/sys/i4b/layer4/i4b_l4.c.patch
>sed 's/^X//' >./usr/src/sys/i4b/layer4/i4b_l4.c.patch << 'END-of-./usr/src/sys/i4b/layer4/i4b_l4.c.patch'
>X*** i4b_l4.c	Sat Dec  5 19:05:49 1998
>X--- i4b_l4.c.new	Wed Mar 17 13:19:36 1999
>X***************
>X*** 79,84 ****
>X--- 79,85 ----
>X  static int i4b_link_bchandrvr(call_desc_t *cd);
>X  static void i4b_unlink_bchandrvr(call_desc_t *cd);
>X  static void i4b_l4_setup_timeout(call_desc_t *cd);
>X+ static time_t i4b_get_idletime(call_desc_t *cd);
>X  
>X  /*---------------------------------------------------------------------------*
>X   *	send MSG_PDEACT_IND message to userland
>X***************
>X*** 753,758 ****
>X--- 754,774 ----
>X  	}
>X  }
>X  
>X+ static time_t
>X+ i4b_get_idletime(call_desc_t *cd)
>X+ {
>X+ 	time_t t;
>X+ 	switch (cd->driver) {
>X+ #if NI4BISPPP > 0
>X+ 		case BDRV_ISPPP:
>X+ 			return i4bisppp_idletime(cd->driver_unit);
>X+ 		break;
>X+ #endif
>X+ 		default:
>X+ 			return SECOND - cd->last_active_time;
>X+ 		break;
>X+ 	}
>X+ }
>X  /*---------------------------------------------------------------------------*
>X   *	B channel idle check timeout function
>X   *---------------------------------------------------------------------------*/
>X***************
>X*** 781,787 ****
>X  
>X  	if(cd->dir == DIR_INCOMING)
>X  	{
>X! 		if((cd->last_active_time + cd->max_idle_time) <= SECOND)
>X  		{
>X  			DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: incoming-call, line idle timeout, disconnecting!\n", (long)SECOND));
>X  			(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X--- 797,803 ----
>X  
>X  	if(cd->dir == DIR_INCOMING)
>X  	{
>X! 		if(i4b_get_idletime(cd) >= cd->max_idle_time)
>X  		{
>X  			DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: incoming-call, line idle timeout, disconnecting!\n", (long)SECOND));
>X  			(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X***************
>X*** 808,814 ****
>X  
>X  		if((cd->idle_time > 0) && (cd->unitlen_time == 0))
>X  		{
>X! 			if((cd->last_active_time + cd->idle_time) <= SECOND)
>X  			{
>X  				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call-st, idle timeout, disconnecting!\n", (long)SECOND));
>X  				(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X--- 824,830 ----
>X  
>X  		if((cd->idle_time > 0) && (cd->unitlen_time == 0))
>X  		{
>X! 			if(i4b_get_idletime(cd) >= cd->idle_time)
>X  			{
>X  				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call-st, idle timeout, disconnecting!\n", (long)SECOND));
>X  				(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>END-of-./usr/src/sys/i4b/layer4/i4b_l4.c.patch
>echo x - ./usr/src/sys/i4b/layer4/i4b_l4.c.orig
>sed 's/^X//' >./usr/src/sys/i4b/layer4/i4b_l4.c.orig << 'END-of-./usr/src/sys/i4b/layer4/i4b_l4.c.orig'
>X/*
>X * Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved.
>X *
>X * Redistribution and use in source and binary forms, with or without
>X * modification, are permitted provided that the following conditions
>X * are met:
>X * 1. Redistributions of source code must retain the above copyright
>X *    notice, this list of conditions and the following disclaimer.
>X * 2. Redistributions in binary form must reproduce the above copyright
>X *    notice, this list of conditions and the following disclaimer in the
>X *    documentation and/or other materials provided with the distribution.
>X *
>X * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
>X * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>X * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>X * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
>X * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>X * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>X * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>X * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>X * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>X * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>X * SUCH DAMAGE.
>X *
>X *---------------------------------------------------------------------------
>X *
>X *	i4b_l4.c - kernel interface to userland
>X *	-----------------------------------------
>X *
>X *	$Id: i4b_l4.c,v 1.1 1998/12/27 21:46:52 phk Exp $ 
>X *
>X *      last edit-date: [Sat Dec  5 18:35:16 1998]
>X *
>X *---------------------------------------------------------------------------*/
>X
>X#include "i4b.h"
>X#include "i4bipr.h"
>X#include "i4bisppp.h"
>X#include "i4brbch.h"
>X#include "i4btel.h"
>X
>X#if NI4B > 0
>X
>X#include <sys/param.h>
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X#include <sys/ioccom.h>
>X#else
>X#include <sys/ioctl.h>
>X#endif
>X#include <sys/kernel.h>
>X#include <sys/systm.h>
>X#include <sys/conf.h>
>X#include <sys/mbuf.h>
>X#include <sys/proc.h>
>X#include <sys/fcntl.h>
>X#include <sys/socket.h>
>X#include <net/if.h>
>X
>X#ifdef __FreeBSD__
>X#include <machine/i4b_debug.h>
>X#include <machine/i4b_ioctl.h>
>X#include <machine/i4b_cause.h>
>X#else
>X#include <i4b/i4b_debug.h>
>X#include <i4b/i4b_ioctl.h>
>X#include <i4b/i4b_cause.h>
>X#endif
>X
>X#include <i4b/include/i4b_global.h>
>X#include <i4b/include/i4b_l3l4.h>
>X#include <i4b/include/i4b_mbuf.h>
>X#include <i4b/layer3/i4b_l3.h>
>X#include <i4b/layer4/i4b_l4.h>
>X
>Xunsigned int i4b_l4_debug = L4_DEBUG_DEFAULT;
>X
>Xstruct ctrl_type_desc ctrl_types[CTRL_NUMTYPES] = { { NULL, NULL} };
>X
>Xstatic int i4b_link_bchandrvr(call_desc_t *cd);
>Xstatic void i4b_unlink_bchandrvr(call_desc_t *cd);
>Xstatic void i4b_l4_setup_timeout(call_desc_t *cd);
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_PDEACT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_pdeact(int controller, int numactive)
>X{
>X	struct mbuf *m;
>X	int i;
>X	call_desc_t *cd;
>X	
>X	for(i=0; i < N_CALL_DESC; i++)
>X	{
>X		if((call_desc[i].cdid != CDID_UNUSED)				  &&
>X		   (ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
>X		   (ctrl_desc[call_desc[i].controller].unit == controller))
>X		{
>X			cd = &call_desc[i];
>X			
>X			if(cd->timeout_active)
>X			{
>X#if defined(__FreeBSD__) && __FreeBSD__ >= 3
>X				untimeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, cd->idle_timeout_handle);	
>X#else
>X				untimeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd);	
>X#endif
>X			}
>X			
>X			if(cd->dlt != NULL)
>X			{
>X				(*cd->dlt->line_disconnected)(cd->driver_unit, (void *)cd);
>X				i4b_unlink_bchandrvr(cd);
>X			}
>X		
>X			if((cd->channelid == CHAN_B1) || (cd->channelid == CHAN_B2))
>X			{
>X				ctrl_desc[cd->controller].bch_state[cd->channelid] = BCH_ST_FREE;
>X			}
>X
>X			cd->cdid = CDID_UNUSED;
>X		}
>X	}
>X	
>X	if((m = i4b_Dgetmbuf(sizeof(msg_pdeact_ind_t))) != NULL)
>X	{
>X		msg_pdeact_ind_t *md = (msg_pdeact_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_PDEACT_IND;
>X		md->header.cdid = -1;
>X
>X		md->controller = controller;
>X		md->numactive = numactive;
>X
>X		i4bputqueue_hipri(m);		/* URGENT !!! */
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_L12STAT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_l12stat(int controller, int layer, int state)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_l12stat_ind_t))) != NULL)
>X	{
>X		msg_l12stat_ind_t *md = (msg_l12stat_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_L12STAT_IND;
>X		md->header.cdid = -1;
>X
>X		md->controller = controller;
>X		md->layer = layer;
>X		md->state = state;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_TEIASG_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_teiasg(int controller, int tei)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_teiasg_ind_t))) != NULL)
>X	{
>X		msg_teiasg_ind_t *md = (msg_teiasg_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_TEIASG_IND;
>X		md->header.cdid = -1;
>X
>X		md->controller = controller;
>X		md->tei = ctrl_desc[controller].tei;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_DIALOUT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_dialout(int driver, int driver_unit)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_dialout_ind_t))) != NULL)
>X	{
>X		msg_dialout_ind_t *md = (msg_dialout_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_DIALOUT_IND;
>X		md->header.cdid = -1;
>X
>X		md->driver = driver;
>X		md->driver_unit = driver_unit;	
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_NEGOTIATION_COMPL message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_negcomplete(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_negcomplete_ind_t))) != NULL)
>X	{
>X		msg_negcomplete_ind_t *md = (msg_negcomplete_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_NEGCOMP_IND;
>X		md->header.cdid = cd->cdid;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_IFSTATE_CHANGED_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_ifstate_changed(call_desc_t *cd, int new_state)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_ifstatechg_ind_t))) != NULL)
>X	{
>X		msg_ifstatechg_ind_t *md = (msg_ifstatechg_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_IFSTATE_CHANGED_IND;
>X		md->header.cdid = cd->cdid;
>X		md->state = new_state;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_DRVRDISC_REQ message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_drvrdisc(int driver, int driver_unit)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_drvrdisc_req_t))) != NULL)
>X	{
>X		msg_drvrdisc_req_t *md = (msg_drvrdisc_req_t *)m->m_data;
>X
>X		md->header.type = MSG_DRVRDISC_REQ;
>X		md->header.cdid = -1;
>X
>X		md->driver = driver;
>X		md->driver_unit = driver_unit;	
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_ACCT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_accounting(int driver, int driver_unit, int accttype, int ioutbytes,
>X		int iinbytes, int ro, int ri, int outbytes, int inbytes)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_accounting_ind_t))) != NULL)
>X	{
>X		msg_accounting_ind_t *md = (msg_accounting_ind_t *)m->m_data;
>X
>X		md->header.type = MSG_ACCT_IND;
>X		md->header.cdid = -1;
>X
>X		md->driver = driver;
>X		md->driver_unit = driver_unit;	
>X
>X		md->accttype = accttype;
>X		md->ioutbytes = ioutbytes;
>X		md->iinbytes = iinbytes;
>X		md->outbps = ro;
>X		md->inbps = ri;
>X		md->outbytes = outbytes;
>X		md->inbytes = inbytes;
>X		
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_CONNECT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_connect_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_connect_ind_t))) != NULL)
>X	{
>X		msg_connect_ind_t *mp = (msg_connect_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_CONNECT_IND;
>X		mp->header.cdid = cd->cdid;
>X
>X		mp->controller = cd->controller;
>X		mp->channel = cd->channelid;
>X		mp->bprot = cd->bprot;
>X
>X		cd->dir = DIR_INCOMING;
>X
>X		if(strlen(cd->dst_telno) > 0)
>X			strcpy(mp->dst_telno, cd->dst_telno);
>X		else
>X			strcpy(mp->dst_telno, TELNO_EMPTY);
>X
>X		if(strlen(cd->src_telno) > 0)
>X			strcpy(mp->src_telno, cd->src_telno);
>X		else
>X			strcpy(mp->src_telno, TELNO_EMPTY);
>X			
>X		strcpy(mp->display, cd->display);
>X
>X		mp->scr_ind = cd->scr_ind;
>X		
>X		T400_start(cd);
>X		
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_CONNECT_ACTIVE_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_connect_active_ind(call_desc_t *cd)
>X{
>X	int s;
>X	struct mbuf *m;
>X
>X	s = SPLI4B();
>X
>X	cd->last_active_time = cd->connect_time = SECOND;
>X
>X	DBGL4(L4_TIMO, "i4b_l4_connect_active_ind", ("last_active/connect_time=%ld\n", (long)cd->connect_time));
>X	
>X	i4b_link_bchandrvr(cd);
>X
>X	(*cd->dlt->line_connected)(cd->driver_unit, (void *)cd);
>X
>X	i4b_l4_setup_timeout(cd);
>X	
>X	splx(s);	
>X	
>X	if((m = i4b_Dgetmbuf(sizeof(msg_connect_active_ind_t))) != NULL)
>X	{
>X		msg_connect_active_ind_t *mp = (msg_connect_active_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_CONNECT_ACTIVE_IND;
>X		mp->header.cdid = cd->cdid;
>X		mp->controller = cd->controller;
>X		mp->channel = cd->channelid;
>X		if(cd->datetime[0] != '\0')
>X			strcpy(mp->datetime, cd->datetime);
>X		else
>X			mp->datetime[0] = '\0';
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_DISCONNECT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_disconnect_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if(cd->timeout_active)
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X		untimeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, cd->idle_timeout_handle);	
>X#else
>X		untimeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd);	
>X#endif
>X
>X	if(cd->dlt != NULL)
>X	{
>X		(*cd->dlt->line_disconnected)(cd->driver_unit, (void *)cd);
>X		i4b_unlink_bchandrvr(cd);
>X	}
>X
>X	if((cd->channelid == CHAN_B1) || (cd->channelid == CHAN_B2))
>X	{
>X		ctrl_desc[cd->controller].bch_state[cd->channelid] = BCH_ST_FREE;
>X	}
>X	else
>X	{
>X		/* no error, might be hunting call for callback */
>X		DBGL4(L4_MSG, "i4b_l4_disconnect_ind", ("channel free not B1/B2 but %d!\n", cd->channelid));
>X	}
>X	
>X	if((m = i4b_Dgetmbuf(sizeof(msg_disconnect_ind_t))) != NULL)
>X	{
>X		msg_disconnect_ind_t *mp = (msg_disconnect_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_DISCONNECT_IND;
>X		mp->header.cdid = cd->cdid;
>X		mp->cause = cd->cause_in;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_IDLE_TIMEOUT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_idle_timeout_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_idle_timeout_ind_t))) != NULL)
>X	{
>X		msg_idle_timeout_ind_t *mp = (msg_idle_timeout_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_IDLE_TIMEOUT_IND;
>X		mp->header.cdid = cd->cdid;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_CHARGING_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_charging_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_charging_ind_t))) != NULL)
>X	{
>X		msg_charging_ind_t *mp = (msg_charging_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_CHARGING_IND;
>X		mp->header.cdid = cd->cdid;
>X		mp->units_type = cd->units_type;
>X
>X/*XXX*/		if(mp->units_type == CHARGE_CALC)
>X			mp->units = cd->cunits;
>X		else
>X			mp->units = cd->units;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_STATUS_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_status_ind(call_desc_t *cd)
>X{
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_ALERT_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_alert_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_alert_ind_t))) != NULL)
>X	{
>X		msg_alert_ind_t *mp = (msg_alert_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_ALERT_IND;
>X		mp->header.cdid = cd->cdid;
>X
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_INFO_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_info_ind(call_desc_t *cd)
>X{
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	send MSG_INFO_IND message to userland
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_l4_proceeding_ind(call_desc_t *cd)
>X{
>X	struct mbuf *m;
>X
>X	if((m = i4b_Dgetmbuf(sizeof(msg_proceeding_ind_t))) != NULL)
>X	{
>X		msg_proceeding_ind_t *mp = (msg_proceeding_ind_t *)m->m_data;
>X
>X		mp->header.type = MSG_PROCEEDING_IND;
>X		mp->header.cdid = cd->cdid;
>X		mp->controller = cd->controller;
>X		mp->channel = cd->channelid;
>X		i4bputqueue(m);
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	link a driver(unit) to a B-channel(controller,unit,channel)
>X *---------------------------------------------------------------------------*/
>Xstatic int
>Xi4b_link_bchandrvr(call_desc_t *cd)
>X{
>X	int t = ctrl_desc[cd->controller].ctrl_type;
>X	
>X	if(t < 0 || t >= CTRL_NUMTYPES || ctrl_types[t].get_linktab == NULL)
>X	{
>X			cd->ilt = NULL;
>X	}
>X	else
>X	{
>X		cd->ilt = ctrl_types[t].get_linktab(
>X			ctrl_desc[cd->controller].unit,
>X			cd->channelid);
>X	}
>X
>X	switch(cd->driver)
>X	{
>X#if NI4BRBCH > 0
>X		case BDRV_RBCH:
>X			cd->dlt = rbch_ret_linktab(cd->driver_unit);
>X			break;
>X#endif
>X		
>X#if NI4BTEL > 0
>X		case BDRV_TEL:
>X			cd->dlt = tel_ret_linktab(cd->driver_unit);
>X			break;
>X#endif
>X
>X#if NI4BIPR > 0
>X		case BDRV_IPR:
>X			cd->dlt = ipr_ret_linktab(cd->driver_unit);
>X			break;
>X#endif
>X
>X#if NI4BISPPP > 0
>X		case BDRV_ISPPP:
>X			cd->dlt = i4bisppp_ret_linktab(cd->driver_unit);
>X			break;
>X#endif
>X
>X		default:
>X			cd->dlt = NULL;
>X			break;
>X	}
>X
>X	if(cd->dlt == NULL || cd->ilt == NULL)
>X		return(-1);
>X
>X	if(t >= 0 && t < CTRL_NUMTYPES && ctrl_types[t].set_linktab != NULL)
>X	{
>X		ctrl_types[t].set_linktab(
>X				ctrl_desc[cd->controller].unit,
>X				cd->channelid,
>X				cd->dlt);
>X	}
>X
>X	switch(cd->driver)
>X	{
>X#if NI4BRBCH > 0
>X		case BDRV_RBCH:
>X			rbch_set_linktab(cd->driver_unit, cd->ilt);
>X			break;
>X#endif
>X
>X#if NI4BTEL > 0
>X		case BDRV_TEL:
>X			tel_set_linktab(cd->driver_unit, cd->ilt);
>X			break;
>X#endif
>X
>X#if NI4BIPR > 0
>X		case BDRV_IPR:
>X			ipr_set_linktab(cd->driver_unit, cd->ilt);
>X			break;
>X#endif
>X
>X#if NI4BISPPP > 0
>X		case BDRV_ISPPP:
>X			i4bisppp_set_linktab(cd->driver_unit, cd->ilt);
>X			break;
>X#endif
>X		default:
>X			return(0);
>X			break;
>X	}
>X
>X	/* activate B channel */
>X		
>X	(*cd->ilt->bch_config)(ctrl_desc[cd->controller].unit,
>X				cd->channelid, cd->bprot, 1);
>X
>X	return(0);
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	unlink a driver(unit) from a B-channel(controller,unit,channel)
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4b_unlink_bchandrvr(call_desc_t *cd)
>X{
>X	int t = ctrl_desc[cd->controller].ctrl_type;
>X
>X	if(t < 0 || t >= CTRL_NUMTYPES || ctrl_types[t].get_linktab == NULL)
>X	{
>X		cd->ilt = NULL;
>X		return;
>X	}
>X	else
>X	{
>X		cd->ilt = ctrl_types[t].get_linktab(
>X				ctrl_desc[cd->controller].unit,
>X				cd->channelid);
>X	}
>X	
>X	/* deactivate B channel */
>X		
>X	(*cd->ilt->bch_config)(ctrl_desc[cd->controller].unit,
>X				cd->channelid, cd->bprot, 0);
>X} 
>X
>X/*---------------------------------------------------------------------------
>X
>X	How shorthold mode works for OUTGOING connections
>X	=================================================
>X
>X	|<---- unchecked-window ------->|<-checkwindow->|<-safetywindow>|
>X
>Xidletime_state:      IST_NONCHK             IST_CHECK       IST_SAFE	
>X	
>X	|				|		|		|
>X  time>>+-------------------------------+---------------+---------------+-...
>X	|				|		|		|
>X	|				|<--idle_time-->|<--earlyhup--->|
>X	|<-----------------------unitlen------------------------------->|
>X
>X	
>X	  unitlen - specifies the time a charging unit lasts
>X	idle_time - specifies the thime the line must be idle at the
>X		    end of the unit to be elected for hangup
>X	 earlyhup - is the beginning of a timing safety zone before the
>X		    next charging unit starts
>X
>X	The algorithm works as follows: lets assume the unitlen is 100
>X	secons, idle_time is 40 seconds and earlyhup is 10 seconds.
>X	The line then must be idle 50 seconds after the begin of the
>X	current unit and it must then be quiet for 40 seconds. if it
>X	has been quiet for this 40 seconds, the line is closed 10
>X	seconds before the next charging unit starts. In case there was
>X	any traffic within the idle_time, the line is not closed.
>X	It does not matter whether there was any traffic between second
>X	0 and second 50 or not.
>X
>X
>X	How shorthold mode works for INCOMING connections
>X	=================================================
>X
>X	it is just possible to specify a maximum idle time for incoming
>X	connections, after this time of no activity on the line the line
>X	is closed.
>X	
>X---------------------------------------------------------------------------*/	
>X
>X/*---------------------------------------------------------------------------*
>X *	B channel idle check timeout setup
>X *---------------------------------------------------------------------------*/
>Xstatic void
>Xi4b_l4_setup_timeout(call_desc_t *cd)
>X{
>X	cd->timeout_active = 0;
>X	cd->idletime_state = IST_IDLE;
>X	
>X	if((cd->dir == DIR_INCOMING) && (cd->max_idle_time > 0))
>X	{
>X		/* incoming call: simple max idletime check */
>X	
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X		cd->idle_timeout_handle =
>X#endif
>X		timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz/2);
>X		cd->timeout_active = 1;
>X		DBGL4(L4_TIMO, "i4b_l4_setup_timeout", ("%ld: incoming-call, setup max_idle_time to %ld\n", (long)SECOND, (long)cd->max_idle_time));
>X	}
>X	else if((cd->dir == DIR_OUTGOING) && (cd->idle_time > 0))
>X	{
>X		/* outgoing call */
>X		
>X		if((cd->idle_time > 0) && (cd->unitlen_time == 0))
>X		{
>X			/* outgoing call: simple max idletime check */
>X			
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X			cd->idle_timeout_handle =
>X#endif
>X			timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz/2);
>X			cd->timeout_active = 1;
>X			DBGL4(L4_TIMO, "i4b_l4_setup_timeout", ("%ld: outgoing-call, setup idle_time to %ld\n", (long)SECOND, (long)cd->idle_time));
>X		}
>X		else if((cd->unitlen_time > 0) && (cd->unitlen_time > (cd->idle_time + cd->earlyhup_time)))
>X		{
>X			/* outgoing call: full shorthold mode check */
>X			
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X			cd->idle_timeout_handle =
>X#endif
>X			timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz*(cd->unitlen_time - (cd->idle_time + cd->earlyhup_time)));
>X			cd->timeout_active = 1;
>X			cd->idletime_state = IST_NONCHK;
>X			DBGL4(L4_TIMO, "i4b_l4_setup_timeout", ("%ld: outgoing-call, start %ld sec nocheck window\n", 
>X				(long)SECOND, (long)(cd->unitlen_time - (cd->idle_time + cd->earlyhup_time))));
>X
>X			if(cd->aocd_flag == 0)
>X			{
>X				cd->units_type = CHARGE_CALC;
>X				cd->cunits++;
>X				i4b_l4_charging_ind(cd);
>X			}
>X		}
>X		else
>X		{
>X			/* parms somehow got wrong .. */
>X			
>X			DBGL4(L4_ERR, "i4b_l4_setup_timeout", ("%ld: ERROR: idletime[%ld]+earlyhup[%ld] > unitlength[%ld]!\n",
>X				(long)SECOND, (long)cd->idle_time, (long)cd->earlyhup_time, (long)cd->unitlen_time));
>X		}
>X	}
>X	else
>X	{
>X		DBGL4(L4_TIMO, "i4b_l4_setup_timeout", ("no idle_timeout configured\n"));
>X	}
>X}
>X
>X/*---------------------------------------------------------------------------*
>X *	B channel idle check timeout function
>X *---------------------------------------------------------------------------*/
>Xvoid
>Xi4b_idle_check(call_desc_t *cd)
>X{
>X	int s;
>X
>X	if(cd->cdid == CDID_UNUSED)
>X		return;
>X	
>X	s = SPLI4B();
>X
>X	/* failsafe */
>X
>X	if(cd->timeout_active == 0)
>X	{
>X		DBGL4(L4_ERR, "i4b_idle_check", ("ERROR: timeout_active == 0 !!!\n"));
>X	}
>X	else
>X	{	
>X		cd->timeout_active = 0;
>X	}
>X	
>X	/* incoming connections, simple idletime check */
>X
>X	if(cd->dir == DIR_INCOMING)
>X	{
>X		if((cd->last_active_time + cd->max_idle_time) <= SECOND)
>X		{
>X			DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: incoming-call, line idle timeout, disconnecting!\n", (long)SECOND));
>X			(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X					(CAUSET_I4B << 8) | CAUSE_I4B_NORMAL);
>X			i4b_l4_idle_timeout_ind(cd);
>X		}
>X		else
>X		{
>X			DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: incoming-call, activity, last_active=%ld, max_idle=%ld\n", (long)SECOND, (long)cd->last_active_time, (long)cd->max_idle_time));
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X			cd->idle_timeout_handle =
>X#endif
>X			timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz/2);
>X			cd->timeout_active = 1;
>X		}
>X	}
>X
>X	/* outgoing connections */
>X
>X	else if(cd->dir == DIR_OUTGOING)
>X	{
>X
>X		/* simple idletime calculation */
>X
>X		if((cd->idle_time > 0) && (cd->unitlen_time == 0))
>X		{
>X			if((cd->last_active_time + cd->idle_time) <= SECOND)
>X			{
>X				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call-st, idle timeout, disconnecting!\n", (long)SECOND));
>X				(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X					(CAUSET_I4B << 8) | CAUSE_I4B_NORMAL);
>X				i4b_l4_idle_timeout_ind(cd);
>X			}
>X			else
>X			{
>X				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call-st, activity, last_active=%ld, max_idle=%ld\n",
>X								(long)SECOND, (long)cd->last_active_time, (long)cd->idle_time));
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X			cd->idle_timeout_handle =
>X#endif
>X				timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz/2);
>X				cd->timeout_active = 1;
>X			}
>X		}
>X
>X		/* full shorthold mode calculation */
>X
>X		else if((cd->unitlen_time > 0) && (cd->unitlen_time > (cd->idle_time + cd->earlyhup_time)))
>X		{
>X			switch(cd->idletime_state)
>X			{
>X			case IST_NONCHK:	/* end of non-check time */
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X				cd->idle_timeout_handle =
>X#endif
>X				timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz*(cd->idle_time));
>X				cd->idletimechk_start = SECOND;
>X				cd->idletime_state = IST_CHECK;
>X				cd->timeout_active = 1;
>X				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call, idletime check window reached!\n", (long)SECOND));
>X				break;
>X
>X			case IST_CHECK:		/* end of idletime chk */
>X				if((cd->last_active_time > cd->idletimechk_start) &&
>X				   (cd->last_active_time <= SECOND))
>X				{	/* activity detected */
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X					cd->idle_timeout_handle =
>X#endif
>X					timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz*(cd->earlyhup_time));
>X					cd->timeout_active = 1;
>X					cd->idletime_state = IST_SAFE;
>X					DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call, activity at %ld, wait earlyhup-end\n", (long)SECOND, (long)cd->last_active_time));
>X				}
>X				else
>X				{	/* no activity, hangup */
>X					DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call, idle timeout, last activity at %ld\n", (long)SECOND, (long)cd->last_active_time));
>X					(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(cd->cdid,
>X						(CAUSET_I4B << 8) | CAUSE_I4B_NORMAL);
>X					i4b_l4_idle_timeout_ind(cd);
>X					cd->idletime_state = IST_IDLE;
>X				}
>X				break;
>X
>X			case IST_SAFE:	/* end of earlyhup time */
>X#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
>X				cd->idle_timeout_handle =
>X#endif
>X				timeout((TIMEOUT_FUNC_T)i4b_idle_check,(void *)cd, hz*(cd->unitlen_time - (cd->idle_time+cd->earlyhup_time)));
>X				cd->timeout_active = 1;
>X				cd->idletime_state = IST_NONCHK;
>X
>X				if(cd->aocd_flag == 0)
>X				{
>X					cd->units_type = CHARGE_CALC;
>X					cd->cunits++;
>X					i4b_l4_charging_ind(cd);
>X				}
>X				
>X				DBGL4(L4_TIMO, "i4b_idle_check", ("%ld: outgoing-call, earlyhup end, wait for idletime start\n", (long)SECOND));
>X				break;
>X
>X			default:
>X				DBGL4(L4_ERR, "i4b_idle_check", ("outgoing-call: invalid idletime_state value!\n"));
>X				cd->idletime_state = IST_IDLE;
>X				break;
>X			}
>X		}
>X	}
>X	splx(s);
>X}
>X
>X#endif /* NI4B > 0 */
>END-of-./usr/src/sys/i4b/layer4/i4b_l4.c.orig
>echo c - ./usr/src/sbin
>mkdir -p ./usr/src/sbin > /dev/null 2>&1
>echo c - ./usr/src/sbin/spppcontrol
>mkdir -p ./usr/src/sbin/spppcontrol > /dev/null 2>&1
>echo x - ./usr/src/sbin/spppcontrol/Makefile
>sed 's/^X//' >./usr/src/sbin/spppcontrol/Makefile << 'END-of-./usr/src/sbin/spppcontrol/Makefile'
>XPROG=	spppcontrol
>X
>X.include <bsd.prog.mk>
>END-of-./usr/src/sbin/spppcontrol/Makefile
>echo x - ./usr/src/sbin/spppcontrol/spppcontrol.1
>sed 's/^X//' >./usr/src/sbin/spppcontrol/spppcontrol.1 << 'END-of-./usr/src/sbin/spppcontrol/spppcontrol.1'
>X.\" Copyright (C) 1997 by Joerg Wunsch, Dresden
>X.\" All rights reserved.
>X.\"
>X.\" Redistribution and use in source and binary forms, with or without
>X.\" modification, are permitted provided that the following conditions
>X.\" are met:
>X.\" 1. Redistributions of source code must retain the above copyright
>X.\"    notice, this list of conditions and the following disclaimer.
>X.\" 2. Redistributions in binary form must reproduce the above copyright
>X.\"    notice, this list of conditions and the following disclaimer in the
>X.\"    documentation and/or other materials provided with the distribution.
>X.\"
>X.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
>X.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
>X.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
>X.\" DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
>X.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
>X.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
>X.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>X.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
>X.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
>X.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
>X.\" POSSIBILITY OF SUCH DAMAGE.
>X.\"
>X.\" $Id: spppcontrol.1,v 1.3 1998/08/03 06:24:59 charnier Exp $
>X.\"
>X.Dd October 11, 1997
>X.Os
>X.Dt SPPPCONTROL 8
>X.Sh NAME
>X.Nm spppcontrol
>X.Nd display or set parameters for an sppp interface
>X.Sh SYNOPSIS
>X.Nm spppcontrol
>X.Op Fl v
>X.Ar ifname
>X.Op Ar parameter Ns Op \&= Ns Ar value
>X.Op Ar ...
>X.Sh DESCRIPTION
>XThe
>X.Xr sppp 4
>Xdriver might require a number of additional arguments or optional
>Xparameters besides the settings that can be adjusted with
>X.Xr ifconfig 8 .
>XThese are things like authentication protocol parameters, but also
>Xother tunable configuration variables.  The
>X.Nm
>Xutility can be used to display the current settings, or adjust these
>Xparameters as required.
>X.Pp
>XFor whatever intent
>X.Nm
>Xis being called, at least the parameter
>X.Ar ifname
>Xneeds to be specified, naming the interface for which the settings
>Xare to be performed or displayed.  Use
>X.Xr ifconfig 8 ,
>Xor
>X.Xr netstat 1
>Xto see which interfaces are available.
>X.Pp
>XIf no other parameter is given,
>X.Nm
>Xwill just list the current settings for
>X.Ar ifname
>Xand exit.  The reported settings include the current PPP phase the
>Xinterface is in, which can be one of the names
>X.Em dead ,
>X.Em establish ,
>X.Em authenticate ,
>X.Em network ,
>Xor
>X.Em terminate .
>XIf an authentication protocol is configured for the interface, the
>Xname of the protocol to be used, as well as the system name to be used
>Xor expected will be displayed, plus any possible options to the
>Xauthentication protocol if applicable.  Note that the authentication
>Xsecrets (sometimes also called
>X.Em keys )
>Xare not being returned by the underlying system call, and are thus not
>Xdisplayed.
>X.Pp
>XIf any additional parameter is supplied, superuser privileges are
>Xrequired, and the command works in
>X.Ql set
>Xmode.  This is normally done quietly, unless the option
>X.Fl v
>Xis also enabled, which will cause a final printout of the settings as
>Xdescribed above once all other actions have been taken.  Use of this
>Xmode will be rejected if the interface is currently in any other phase
>Xthan
>X.Em dead .
>XNote that you can force an interface into
>X.Em dead
>Xphase by calling
>X.Xr ifconfig 8
>Xwith the parameter
>X.Ql down .
>X.Pp
>XThe currently supported parameters include:
>X.Bl -tag -offset indent -width indent
>X.It Ar authproto Ns \&= Ns Em protoname
>XSet both, his and my authentication protocol to
>X.Em protoname .
>XThe protocol name can be one of
>X.Ql chap ,
>X.Ql pap ,
>Xor
>X.Ql none .
>XIn the latter case, the use of an authentication protocol will be
>Xturned off for the named interface.  This has the side-effect of
>Xclearing the other authentication-related parameters for this
>Xinterface as well (i.e. system name and authentication secret will
>Xbe forgotten).
>X.It Ar myauthproto Ns \&= Ns Em protoname
>XSame as above, but only for my end of the link. I.e. this is the
>Xprotocol when remote is authenticator, and I am the peer required to
>Xauthenticate.
>X.It Ar hisauthproto Ns \&= Ns Em protoname
>XSame as above, but only for his end of the link.
>X.It Ar myauthname Ns \&= Ns Em name
>XSet my system name for the authentication protocol.
>X.It Ar hisauthname Ns \&= Ns Em name
>XSet his system name for the authentication protocol.  For CHAP, this
>Xwill only be used as a hint, causing a warning message if remote did
>Xsupply a different name.  For PAP, it's the name remote must use to
>Xauthenticate himself (in connection with his secret).
>X.It Ar myauthsecret Ns \&= Ns Em secret
>XSet my secret (key, password) for use in the authentication phase.
>XFor CHAP, this will be used to compute the response hash value, based
>Xon remote's challenge.  For PAP, it will be transmitted as plain text
>Xtogether with the system name.  Don't forget to quote the secrets from
>Xthe shell if they contain shell metacharacters (or white space).
>X.It Ar myauthkey Ns \&= Ns Em secret
>XSame as above.
>X.It Ar hisauthsecret Ns \&= Ns Em secret
>XSame as above, to be used if we are authenticator and the remote peer
>Xneeds to authenticate.
>X.It Ar hisauthkey Ns \&= Ns Em secret
>XSame as above.
>X.It Ar callin
>XRequire remote to authenticate himself only when he's calling in, but
>Xnot when we are caller.  This is required for some peers that do not
>Ximplement the authentication protocols symmetrically (like Ascend
>Xrouters, for example).
>X.It Ar always
>XThe opposite of
>X.Ar callin .
>XRequire remote to always authenticate, regardless of which side is
>Xplacing the call.  This is the default, and will not be explicitly
>Xdisplayed in
>X.Ql list
>Xmode.
>X.It Ar norechallenge
>XOnly meaningful with CHAP.  Do not re-challenge peer once the initial
>XCHAP handshake was successful.  Used to work around broken peer
>Ximplementations that can't grok being re-challenged once the
>Xconnection is up.
>X.It Ar rechallenge
>XWith CHAP, send re-challenges at random intervals while the connection
>Xis in network phase.  (The intervals are currently in the range of 300
>Xthrough approximately 800 seconds.)  This is the default, and will not
>Xbe explicitly displayed in
>X.Ql list
>Xmode.
>X.El
>X.Sh EXAMPLES
>X.Bd -literal
>X# spppcontrol bppp0
>Xbppp0:	phase=dead
>X	myauthproto=chap myauthname="uriah"
>X	hisauthproto=chap hisauthname="ifb-gw" norechallenge
>X.Ed
>X.Pp
>XDisplay the settings for bppp0.  The interface is currently in
>X.Em dead
>Xphase, i.e. the LCP layer is down, and no traffic is possible.  Both
>Xends of the connection use the CHAP protocol, my end tells remote the
>Xsystem name
>X.Ql uriah ,
>Xand remote is expected to authenticate by the name
>X.Ql ifb-gw .
>XOnce the initial CHAP handshake was successful, no further CHAP
>Xchallenges will be transmitted.  There are supposedly some known CHAP
>Xsecrets for both ends of the link which are not being shown.
>X.Pp
>X.Bd -literal
>X# spppcontrol bppp0 \e
>X	authproto=chap \e
>X	myauthname=uriah myauthsecret='some secret' \e
>X	hisauthname=ifb-gw hisauthsecret='another' \e
>X	norechallenge
>X.Ed
>X.Pp
>XA possible call to
>X.Nm
>Xthat could have been used to bring the interface into the state shown
>Xby the previous example.
>X.Sh SEE ALSO
>X.Xr netstat 1 ,
>X.Xr sppp 4 ,
>X.Xr ifconfig 8
>X.Rs
>X.%A B. Lloyd,  W. Simpson
>X.%T "PPP Authentication Protocols"
>X.%O RFC 1334
>X.Re
>X.Rs
>X.%A W. Simpson, Editor
>X.%T "The Point-to-Point Protocol (PPP)"
>X.%O RFC 1661
>X.Re
>X.Rs
>X.%A W. Simpson
>X.%T "PPP Challenge Handshake Authentication Protocol (CHAP)"
>X.%O RFC 1994
>X.Re
>X.Sh HISTORY
>XThe
>X.Nm
>Xutility appeared in
>X.Fx 3.0 .
>X.Sh AUTHORS
>XThe program was written by
>X.ie t J\(:org Wunsch,
>X.el Joerg Wunsch,
>XDresden.
>END-of-./usr/src/sbin/spppcontrol/spppcontrol.1
>echo x - ./usr/src/sbin/spppcontrol/spppcontrol.c
>sed 's/^X//' >./usr/src/sbin/spppcontrol/spppcontrol.c << 'END-of-./usr/src/sbin/spppcontrol/spppcontrol.c'
>X/*
>X * Copyright (c) 1997 Joerg Wunsch
>X *
>X * All rights reserved.
>X *
>X * Redistribution and use in source and binary forms, with or without
>X * modification, are permitted provided that the following conditions
>X * are met:
>X * 1. Redistributions of source code must retain the above copyright
>X *    notice, this list of conditions and the following disclaimer.
>X * 2. Redistributions in binary form must reproduce the above copyright
>X *    notice, this list of conditions and the following disclaimer in the
>X *    documentation and/or other materials provided with the distribution.
>X *
>X * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
>X * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
>X * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
>X * IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
>X * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
>X * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>X * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
>X * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>X * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
>X * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>X */
>X
>X#ifndef lint
>Xstatic const char rcsid[] =
>X	"$Id: spppcontrol.c,v 1.4 1998/08/03 06:24:59 charnier Exp $";
>X#endif /* not lint */
>X
>X#include <sys/param.h>
>X#include <sys/callout.h>
>X#include <sys/ioctl.h>
>X#include <sys/socket.h>
>X
>X#include <net/if.h>
>X#include <net/if_var.h>
>X#include <net/if_sppp.h>
>X
>X#include <err.h>
>X#include <stdio.h>
>X#include <string.h>
>X#include <sysexits.h>
>X#include <unistd.h>
>X
>Xstatic void usage(void);
>Xvoid	print_vals(const char *ifname, struct spppreq *sp);
>Xconst char *phase_name(enum ppp_phase phase);
>Xconst char *proto_name(u_short proto);
>Xconst char *authflags(u_short flags);
>X
>X#define PPP_PAP		0xc023
>X#define PPP_CHAP	0xc223
>X
>Xint
>Xmain(int argc, char **argv)
>X{
>X	int s, c;
>X	int errs = 0, verbose = 0;
>X	size_t off;
>X	const char *ifname, *cp;
>X	struct ifreq ifr;
>X	struct spppreq spr;
>X
>X	while ((c = getopt(argc, argv, "v")) != -1)
>X		switch (c) {
>X		case 'v':
>X			verbose++;
>X			break;
>X
>X		default:
>X			errs++;
>X			break;
>X		}
>X	argv += optind;
>X	argc -= optind;
>X
>X	if (errs || argc < 1)
>X		usage();
>X
>X	ifname = argv[0];
>X	strncpy(ifr.ifr_name, ifname, sizeof ifr.ifr_name);
>X
>X	/* use a random AF to create the socket */
>X	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
>X		err(EX_UNAVAILABLE, "ifconfig: socket");
>X
>X	argc--;
>X	argv++;
>X
>X	spr.cmd = (int)SPPPIOGDEFS;
>X	ifr.ifr_data = (caddr_t)&spr;
>X
>X	if (ioctl(s, SIOCGIFGENERIC, &ifr) == -1)
>X		err(EX_OSERR, "SIOCGIFGENERIC(SPPPIOGDEFS)");
>X
>X	if (argc == 0) {
>X		/* list only mode */
>X		print_vals(ifname, &spr);
>X		return 0;
>X	}
>X
>X#define startswith(s) strncmp(argv[0], s, (off = strlen(s))) == 0
>X
>X	while (argc > 0) {
>X		if (startswith("authproto=")) {
>X			cp = argv[0] + off;
>X			if (strcmp(cp, "pap") == 0)
>X				spr.defs.myauth.proto =
>X					spr.defs.hisauth.proto = PPP_PAP;
>X			else if (strcmp(cp, "chap") == 0)
>X				spr.defs.myauth.proto =
>X					spr.defs.hisauth.proto = PPP_CHAP;
>X			else if (strcmp(cp, "none") == 0)
>X				spr.defs.myauth.proto =
>X					spr.defs.hisauth.proto = 0;
>X			else
>X				errx(EX_DATAERR, "bad auth proto: %s", cp);
>X		} else if (startswith("myauthproto=")) {
>X			cp = argv[0] + off;
>X			if (strcmp(cp, "pap") == 0)
>X				spr.defs.myauth.proto = PPP_PAP;
>X			else if (strcmp(cp, "chap") == 0)
>X				spr.defs.myauth.proto = PPP_CHAP;
>X			else if (strcmp(cp, "none") == 0)
>X				spr.defs.myauth.proto = 0;
>X			else
>X				errx(EX_DATAERR, "bad auth proto: %s", cp);
>X		} else if (startswith("myauthname="))
>X			strncpy(spr.defs.myauth.name, argv[0] + off,
>X				AUTHNAMELEN);
>X		else if (startswith("myauthsecret=") ||
>X			 startswith("myauthkey="))
>X			strncpy(spr.defs.myauth.secret, argv[0] + off,
>X				AUTHKEYLEN);
>X		else if (startswith("hisauthproto=")) {
>X			cp = argv[0] + off;
>X			if (strcmp(cp, "pap") == 0)
>X				spr.defs.hisauth.proto = PPP_PAP;
>X			else if (strcmp(cp, "chap") == 0)
>X				spr.defs.hisauth.proto = PPP_CHAP;
>X			else if (strcmp(cp, "none") == 0)
>X				spr.defs.hisauth.proto = 0;
>X			else
>X				errx(EX_DATAERR, "bad auth proto: %s", cp);
>X		} else if (startswith("hisauthname="))
>X			strncpy(spr.defs.hisauth.name, argv[0] + off,
>X				AUTHNAMELEN);
>X		else if (startswith("hisauthsecret=") ||
>X			 startswith("hisauthkey="))
>X			strncpy(spr.defs.hisauth.secret, argv[0] + off,
>X				AUTHKEYLEN);
>X		else if (strcmp(argv[0], "callin") == 0)
>X			spr.defs.hisauth.flags |= AUTHFLAG_NOCALLOUT;
>X		else if (strcmp(argv[0], "always") == 0)
>X			spr.defs.hisauth.flags &= ~AUTHFLAG_NOCALLOUT;
>X		else if (strcmp(argv[0], "norechallenge") == 0)
>X			spr.defs.hisauth.flags |= AUTHFLAG_NORECHALLENGE;
>X		else if (strcmp(argv[0], "rechallenge") == 0)
>X			spr.defs.hisauth.flags &= ~AUTHFLAG_NORECHALLENGE;
>X		else
>X			errx(EX_DATAERR, "bad parameter: \"%s\"", argv[0]);
>X
>X		argv++;
>X		argc--;
>X	}
>X
>X	spr.cmd = (int)SPPPIOSDEFS;
>X
>X	if (ioctl(s, SIOCSIFGENERIC, &ifr) == -1)
>X		err(EX_OSERR, "SIOCSIFGENERIC(SPPPIOSDEFS)");
>X
>X	if (verbose)
>X		print_vals(ifname, &spr);
>X
>X	return 0;
>X}
>X
>Xstatic void
>Xusage(void)
>X{
>X	fprintf(stderr, "%s\n%s\n",
>X	"usage: spppcontrol [-v] ifname [{my|his}auth{proto|name|secret}=...]",
>X	"       spppcontrol [-v] ifname callin|always");
>X	exit(EX_USAGE);
>X}
>X
>Xvoid
>Xprint_vals(const char *ifname, struct spppreq *sp)
>X{
>X	time_t send, recv;
>X	printf("%s:\tphase=%s\n", ifname, phase_name(sp->defs.pp_phase));
>X	if (sp->defs.myauth.proto) {
>X		printf("\tmyauthproto=%s myauthname=\"%.*s\"\n",
>X		       proto_name(sp->defs.myauth.proto),
>X		       AUTHNAMELEN, sp->defs.myauth.name);
>X	}
>X	if (sp->defs.hisauth.proto) {
>X		printf("\thisauthproto=%s hisauthname=\"%.*s\"%s\n",
>X		       proto_name(sp->defs.hisauth.proto),
>X		       AUTHNAMELEN, sp->defs.hisauth.name,
>X		       authflags(sp->defs.hisauth.flags));
>X	}
>X	send = time(NULL) - sp->defs.pp_last_sent;
>X	recv = time(NULL) - sp->defs.pp_last_recv;
>X	printf("\tidle_time=%ld\n", (send<recv)? send : recv);
>X}
>X
>Xconst char *
>Xphase_name(enum ppp_phase phase)
>X{
>X	switch (phase) {
>X	case PHASE_DEAD:	return "dead";
>X	case PHASE_ESTABLISH:	return "establish";
>X	case PHASE_TERMINATE:	return "terminate";
>X	case PHASE_AUTHENTICATE: return "authenticate";
>X	case PHASE_NETWORK:	return "network";
>X	}
>X	return "illegal";
>X}
>X
>Xconst char *
>Xproto_name(u_short proto)
>X{
>X	static char buf[12];
>X	switch (proto) {
>X	case PPP_PAP:	return "pap";
>X	case PPP_CHAP:	return "chap";
>X	}
>X	sprintf(buf, "0x%x", (unsigned)proto);
>X	return buf;
>X}
>X
>Xconst char *
>Xauthflags(u_short flags)
>X{
>X	static char buf[10];
>X	buf[0] = '\0';
>X	if (flags & AUTHFLAG_NOCALLOUT)
>X		strcat(buf, " callin");
>X	if (flags & AUTHFLAG_NORECHALLENGE)
>X		strcat(buf, " norechallenge");
>X	return buf;
>X}
>END-of-./usr/src/sbin/spppcontrol/spppcontrol.c
>echo x - ./usr/src/sbin/spppcontrol/spppcontrol.c.patch
>sed 's/^X//' >./usr/src/sbin/spppcontrol/spppcontrol.c.patch << 'END-of-./usr/src/sbin/spppcontrol/spppcontrol.c.patch'
>X*** spppcontrol.c	Mon Mar 15 15:04:04 1999
>X--- spppcontrol.c.new	Mon Mar 15 15:03:43 1999
>X***************
>X*** 209,212 ****
>X--- 209,213 ----
>X  print_vals(const char *ifname, struct spppreq *sp)
>X  {
>X+ 	time_t send, recv;
>X  	printf("%s:\tphase=%s\n", ifname, phase_name(sp->defs.pp_phase));
>X  	if (sp->defs.myauth.proto) {
>X***************
>X*** 221,224 ****
>X--- 222,228 ----
>X  		       authflags(sp->defs.hisauth.flags));
>X  	}
>X+ 	send = time(NULL) - sp->defs.pp_last_sent;
>X+ 	recv = time(NULL) - sp->defs.pp_last_recv;
>X+ 	printf("\tidle_time=%ld\n", (send<recv)? send : recv);
>X  }
>X  
>END-of-./usr/src/sbin/spppcontrol/spppcontrol.c.patch
>echo x - ./usr/src/sbin/spppcontrol/spppcontrol.c.orig
>sed 's/^X//' >./usr/src/sbin/spppcontrol/spppcontrol.c.orig << 'END-of-./usr/src/sbin/spppcontrol/spppcontrol.c.orig'
>X/*
>X * Copyright (c) 1997 Joerg Wunsch
>X *
>X * All rights reserved.
>X *
>X * Redistribution and use in source and binary forms, with or without
>X * modification, are permitted provided that the following conditions
>X * are met:
>X * 1. Redistributions of source code must retain the above copyright
>X *    notice, this list of conditions and the following disclaimer.
>X * 2. Redistributions in binary form must reproduce the above copyright
>X *    notice, this list of conditions and the following disclaimer in the
>X *    documentation and/or other materials provided with the distribution.
>X *
>X * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
>X * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
>X * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
>X * IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
>X * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
>X * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>X * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
>X * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>X * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
>X * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>X */
>X
>X#ifndef lint
>Xstatic const char rcsid[] =
>X	"$Id: spppcontrol.c,v 1.4 1998/08/03 06:24:59 charnier Exp $";
>X#endif /* not lint */
>X
>X#include <sys/param.h>
>X#include <sys/callout.h>
>X#include <sys/ioctl.h>
>X#include <sys/socket.h>
>X
>X#include <net/if.h>
>X#include <net/if_var.h>
>X#include <net/if_sppp.h>
>X
>X#include <err.h>
>X#include <stdio.h>
>X#include <string.h>
>X#include <sysexits.h>
>X#include <unistd.h>
>X
>Xstatic void usage(void);
>Xvoid	print_vals(const char *ifname, struct spppreq *sp);
>Xconst char *phase_name(enum ppp_phase phase);
>Xconst char *proto_name(u_short proto);
>Xconst char *authflags(u_short flags);
>X
>X#define PPP_PAP		0xc023
>X#define PPP_CHAP	0xc223
>X
>Xint
>Xmain(int argc, char **argv)
>X{
>X	int s, c;
>X	int errs = 0, verbose = 0;
>X	size_t off;
>X	const char *ifname, *cp;
>X	struct ifreq ifr;
>X	struct spppreq spr;
>X
>X	while ((c = getopt(argc, argv, "v")) != -1)
>X		switch (c) {
>X		case 'v':
>X			verbose++;
>X			break;
>X
>X		default:
>X			errs++;
>X			break;
>X		}
>X	argv += optind;
>X	argc -= optind;
>X
>X	if (errs || argc < 1)
>X		usage();
>X
>X	ifname = argv[0];
>X	strncpy(ifr.ifr_name, ifname, sizeof ifr.ifr_name);
>X
>X	/* use a random AF to create the socket */
>X	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
>X		err(EX_UNAVAILABLE, "ifconfig: socket");
>X
>X	argc--;
>X	argv++;
>X
>X	spr.cmd = (int)SPPPIOGDEFS;
>X	ifr.ifr_data = (caddr_t)&spr;
>X
>X	if (ioctl(s, SIOCGIFGENERIC, &ifr) == -1)
>X		err(EX_OSERR, "SIOCGIFGENERIC(SPPPIOGDEFS)");
>X
>X	if (argc == 0) {
>X		/* list only mode */
>X		print_vals(ifname, &spr);
>X		return 0;
>X	}
>X
>X#define startswith(s) strncmp(argv[0], s, (off = strlen(s))) == 0
>X
>X	while (argc > 0) {
>X		if (startswith("authproto=")) {
>X			cp = argv[0] + off;
>X			if (strcmp(cp, "pap") == 0)
>X				spr.defs.myauth.proto =
>X					spr.defs.hisauth.proto = PPP_PAP;
>X			else if (strcmp(cp, "chap") == 0)
>X				spr.defs.myauth.proto =
>X					spr.defs.hisauth.proto = PPP_CHAP;
>X			else if (strcmp(cp, "none") == 0)
>X				spr.defs.myauth.proto =
>X					spr.defs.hisauth.proto = 0;
>X			else
>X				errx(EX_DATAERR, "bad auth proto: %s", cp);
>X		} else if (startswith("myauthproto=")) {
>X			cp = argv[0] + off;
>X			if (strcmp(cp, "pap") == 0)
>X				spr.defs.myauth.proto = PPP_PAP;
>X			else if (strcmp(cp, "chap") == 0)
>X				spr.defs.myauth.proto = PPP_CHAP;
>X			else if (strcmp(cp, "none") == 0)
>X				spr.defs.myauth.proto = 0;
>X			else
>X				errx(EX_DATAERR, "bad auth proto: %s", cp);
>X		} else if (startswith("myauthname="))
>X			strncpy(spr.defs.myauth.name, argv[0] + off,
>X				AUTHNAMELEN);
>X		else if (startswith("myauthsecret=") ||
>X			 startswith("myauthkey="))
>X			strncpy(spr.defs.myauth.secret, argv[0] + off,
>X				AUTHKEYLEN);
>X		else if (startswith("hisauthproto=")) {
>X			cp = argv[0] + off;
>X			if (strcmp(cp, "pap") == 0)
>X				spr.defs.hisauth.proto = PPP_PAP;
>X			else if (strcmp(cp, "chap") == 0)
>X				spr.defs.hisauth.proto = PPP_CHAP;
>X			else if (strcmp(cp, "none") == 0)
>X				spr.defs.hisauth.proto = 0;
>X			else
>X				errx(EX_DATAERR, "bad auth proto: %s", cp);
>X		} else if (startswith("hisauthname="))
>X			strncpy(spr.defs.hisauth.name, argv[0] + off,
>X				AUTHNAMELEN);
>X		else if (startswith("hisauthsecret=") ||
>X			 startswith("hisauthkey="))
>X			strncpy(spr.defs.hisauth.secret, argv[0] + off,
>X				AUTHKEYLEN);
>X		else if (strcmp(argv[0], "callin") == 0)
>X			spr.defs.hisauth.flags |= AUTHFLAG_NOCALLOUT;
>X		else if (strcmp(argv[0], "always") == 0)
>X			spr.defs.hisauth.flags &= ~AUTHFLAG_NOCALLOUT;
>X		else if (strcmp(argv[0], "norechallenge") == 0)
>X			spr.defs.hisauth.flags |= AUTHFLAG_NORECHALLENGE;
>X		else if (strcmp(argv[0], "rechallenge") == 0)
>X			spr.defs.hisauth.flags &= ~AUTHFLAG_NORECHALLENGE;
>X		else
>X			errx(EX_DATAERR, "bad parameter: \"%s\"", argv[0]);
>X
>X		argv++;
>X		argc--;
>X	}
>X
>X	spr.cmd = (int)SPPPIOSDEFS;
>X
>X	if (ioctl(s, SIOCSIFGENERIC, &ifr) == -1)
>X		err(EX_OSERR, "SIOCSIFGENERIC(SPPPIOSDEFS)");
>X
>X	if (verbose)
>X		print_vals(ifname, &spr);
>X
>X	return 0;
>X}
>X
>Xstatic void
>Xusage(void)
>X{
>X	fprintf(stderr, "%s\n%s\n",
>X	"usage: spppcontrol [-v] ifname [{my|his}auth{proto|name|secret}=...]",
>X	"       spppcontrol [-v] ifname callin|always");
>X	exit(EX_USAGE);
>X}
>X
>Xvoid
>Xprint_vals(const char *ifname, struct spppreq *sp)
>X{
>X	printf("%s:\tphase=%s\n", ifname, phase_name(sp->defs.pp_phase));
>X	if (sp->defs.myauth.proto) {
>X		printf("\tmyauthproto=%s myauthname=\"%.*s\"\n",
>X		       proto_name(sp->defs.myauth.proto),
>X		       AUTHNAMELEN, sp->defs.myauth.name);
>X	}
>X	if (sp->defs.hisauth.proto) {
>X		printf("\thisauthproto=%s hisauthname=\"%.*s\"%s\n",
>X		       proto_name(sp->defs.hisauth.proto),
>X		       AUTHNAMELEN, sp->defs.hisauth.name,
>X		       authflags(sp->defs.hisauth.flags));
>X	}
>X}
>X
>Xconst char *
>Xphase_name(enum ppp_phase phase)
>X{
>X	switch (phase) {
>X	case PHASE_DEAD:	return "dead";
>X	case PHASE_ESTABLISH:	return "establish";
>X	case PHASE_TERMINATE:	return "terminate";
>X	case PHASE_AUTHENTICATE: return "authenticate";
>X	case PHASE_NETWORK:	return "network";
>X	}
>X	return "illegal";
>X}
>X
>Xconst char *
>Xproto_name(u_short proto)
>X{
>X	static char buf[12];
>X	switch (proto) {
>X	case PPP_PAP:	return "pap";
>X	case PPP_CHAP:	return "chap";
>X	}
>X	sprintf(buf, "0x%x", (unsigned)proto);
>X	return buf;
>X}
>X
>Xconst char *
>Xauthflags(u_short flags)
>X{
>X	static char buf[10];
>X	buf[0] = '\0';
>X	if (flags & AUTHFLAG_NOCALLOUT)
>X		strcat(buf, " callin");
>X	if (flags & AUTHFLAG_NORECHALLENGE)
>X		strcat(buf, " norechallenge");
>X	return buf;
>X}
>END-of-./usr/src/sbin/spppcontrol/spppcontrol.c.orig
>exit

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Attachments on bug 13841: 5963