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Link Here
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--- /dev/null 2024-03-22 15:39:07.538356000 +0100 |
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+++ sysdep/bsd-netlink/netlink-route.h 2024-03-22 15:39:02.226088000 +0100 |
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@@ -0,0 +1,367 @@ |
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+/*- |
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+ * SPDX-License-Identifier: BSD-2-Clause |
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+ * |
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+ * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org> |
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+ * |
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+ * Redistribution and use in source and binary forms, with or without |
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+ * modification, are permitted provided that the following conditions |
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+ * are met: |
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+ * 1. Redistributions of source code must retain the above copyright |
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+ * notice, this list of conditions and the following disclaimer. |
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+ * 2. Redistributions in binary form must reproduce the above copyright |
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+ * notice, this list of conditions and the following disclaimer in the |
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+ * documentation and/or other materials provided with the distribution. |
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+ * |
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+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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+ * SUCH DAMAGE. |
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+ */ |
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+ |
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+/* |
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+ * Route-related (RTM_<NEW|DEL|GET>ROUTE) message header and attributes. |
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+ */ |
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+ |
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+#ifndef _NETLINK_ROUTE_ROUTE_H_ |
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+#define _NETLINK_ROUTE_ROUTE_H_ |
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+ |
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+/* Base header for all of the relevant messages */ |
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+struct rtmsg { |
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+ unsigned char rtm_family; /* address family */ |
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+ unsigned char rtm_dst_len; /* Prefix length */ |
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+ unsigned char rtm_src_len; /* Source prefix length (not used) */ |
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+ unsigned char rtm_tos; /* Type of service (not used) */ |
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+ unsigned char rtm_table; /* rtable id */ |
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+ unsigned char rtm_protocol; /* Routing protocol id (RTPROT_) */ |
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+ unsigned char rtm_scope; /* Route distance (RT_SCOPE_) */ |
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+ unsigned char rtm_type; /* Route type (RTN_) */ |
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+ unsigned rtm_flags; /* Route flags (RTM_F_) */ |
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+}; |
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+ |
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+/* |
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+ * RFC 3549, 3.1.1, route type (rtm_type field). |
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+ */ |
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+enum { |
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+ RTN_UNSPEC, |
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+ RTN_UNICAST, /* Unicast route */ |
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+ RTN_LOCAL, /* Accept locally (not supported) */ |
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+ RTN_BROADCAST, /* Accept locally as broadcast, send as broadcast */ |
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+ RTN_ANYCAST, /* Accept locally as broadcast, but send as unicast */ |
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+ RTN_MULTICAST, /* Multicast route */ |
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+ RTN_BLACKHOLE, /* Drop traffic towards destination */ |
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+ RTN_UNREACHABLE, /* Destination is unreachable */ |
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+ RTN_PROHIBIT, /* Administratively prohibited */ |
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+ RTN_THROW, /* Not in this table (not supported) */ |
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+ RTN_NAT, /* Translate this address (not supported) */ |
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+ RTN_XRESOLVE, /* Use external resolver (not supported) */ |
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+ __RTN_MAX, |
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+}; |
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+#define RTN_MAX (__RTN_MAX - 1) |
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+ |
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+/* |
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+ * RFC 3549, 3.1.1, protocol (Identifies what/who added the route). |
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+ * Values larger than RTPROT_STATIC(4) are not interpreted by the |
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+ * kernel, they are just for user information. |
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+ */ |
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+#define RTPROT_UNSPEC 0 |
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+#define RTPROT_REDIRECT 1 /* Route installed by ICMP redirect */ |
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+#define RTPROT_KERNEL 2 /* Route installed by kernel */ |
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+#define RTPROT_BOOT 3 /* Route installed during boot */ |
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+#define RTPROT_STATIC 4 /* Route installed by administrator */ |
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+ |
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+#define RTPROT_GATED 8 |
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+#define RTPROT_RA 9 |
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+#define RTPROT_MRT 1 |
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+#define RTPROT_ZEBRA 11 |
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+#define RTPROT_BIRD 12 |
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+#define RTPROT_DNROUTED 13 |
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+#define RTPROT_XORP 14 |
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+#define RTPROT_NTK 15 |
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+#define RTPROT_DHCP 16 |
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+#define RTPROT_MROUTED 17 |
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+#define RTPROT_KEEPALIVED 18 |
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+#define RTPROT_BABEL 42 |
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+#define RTPROT_OPENR 99 |
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+#define RTPROT_BGP 186 |
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+#define RTPROT_ISIS 187 |
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+#define RTPROT_OSPF 188 |
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+#define RTPROT_RIP 189 |
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+#define RTPROT_EIGRP 192 |
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+ |
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+/* |
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+ * RFC 3549 3.1.1 Route scope (valid distance to destination). |
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+ * |
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+ * The values between RT_SCOPE_UNIVERSE(0) and RT_SCOPE_SITE(200) |
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+ * are available to the user. |
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+ */ |
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+enum rt_scope_t { |
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+ RT_SCOPE_UNIVERSE = 0, |
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+ /* User defined values */ |
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+ RT_SCOPE_SITE = 200, |
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+ RT_SCOPE_LINK = 253, |
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+ RT_SCOPE_HOST = 254, |
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+ RT_SCOPE_NOWHERE = 255 |
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+}; |
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+ |
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+/* |
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+ * RFC 3549 3.1.1 Route flags (rtm_flags). |
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+ * Is a composition of RTNH_F flags (0x1..0x40 range), RTM_F flags (below) |
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+ * and per-protocol (IPv4/IPv6) flags. |
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+ */ |
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+#define RTM_F_NOTIFY 0x00000100 /* not supported */ |
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+#define RTM_F_CLONED 0x00000200 /* not supported */ |
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+#define RTM_F_EQUALIZE 0x00000400 /* not supported */ |
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+#define RTM_F_PREFIX 0x00000800 /* not supported */ |
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+#define RTM_F_LOOKUP_TABLE 0x00001000 /* not supported */ |
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+#define RTM_F_FIB_MATCH 0x00002000 /* not supported */ |
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+#define RTM_F_OFFLOAD 0x00004000 /* not supported */ |
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+#define RTM_F_TRAP 0x00008000 /* not supported */ |
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+#define RTM_F_OFFLOAD_FAILED 0x20000000 /* not supported */ |
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+ |
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+/* Compatibility handling helpers */ |
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+#ifndef _KERNEL |
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+#define NL_RTM_HDRLEN ((int)sizeof(struct rtmsg)) |
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+#define RTM_RTA(_rtm) ((struct rtattr *)((char *)(_rtm) + NL_RTM_HDRLEN)) |
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+#define RTM_PAYLOAD(_hdr) NLMSG_PAYLOAD((_hdr), NL_RTM_HDRLEN) |
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+#endif |
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+ |
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+/* |
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+ * Routing table identifiers. |
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+ * FreeBSD route table numbering starts from 0, where 0 is a valid default routing table. |
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+ * Indicating "all tables" via netlink can be done by not including RTA_TABLE attribute |
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+ * and keeping rtm_table=0 (compatibility) or setting RTA_TABLE value to RT_TABLE_UNSPEC. |
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+ */ |
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+#define RT_TABLE_MAIN 0 /* RT_DEFAULT_FIB */ |
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+#define RT_TABLE_UNSPEC 0xFFFFFFFF /* RT_ALL_FIBS */ |
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+ |
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+enum rtattr_type_t { |
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+ NL_RTA_UNSPEC, |
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+ NL_RTA_DST = 1, /* binary, IPv4/IPv6 destination */ |
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+ NL_RTA_SRC = 2, /* binary, preferred source address */ |
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+ NL_RTA_IIF = 3, /* not supported */ |
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+ NL_RTA_OIF = 4, /* u32, transmit ifindex */ |
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+ NL_RTA_GATEWAY = 5, /* binary: IPv4/IPv6 gateway */ |
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+ NL_RTA_PRIORITY = 6, /* not supported */ |
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+ NL_RTA_PREFSRC = 7, /* not supported */ |
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+ NL_RTA_METRICS = 8, /* nested, list of NL_RTAX* attrs */ |
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+ NL_RTA_MULTIPATH = 9, /* binary, array of struct rtnexthop */ |
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+ NL_RTA_PROTOINFO = 10, /* not supported / deprecated */ |
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+ NL_RTA_KNH_ID = 10, /* u32, FreeBSD specific, kernel nexthop index */ |
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+ NL_RTA_FLOW = 11, /* not supported */ |
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+ NL_RTA_CACHEINFO = 12, /* not supported */ |
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+ NL_RTA_SESSION = 13, /* not supported / deprecated */ |
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+ NL_RTA_WEIGHT = 13, /* u32, FreeBSD specific, path weight */ |
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+ NL_RTA_MP_ALGO = 14, /* not supported / deprecated */ |
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+ NL_RTA_RTFLAGS = 14, /* u32, FreeBSD specific, path flags (RTF_)*/ |
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+ NL_RTA_TABLE = 15, /* u32, fibnum */ |
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+ NL_RTA_MARK = 16, /* not supported */ |
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+ NL_RTA_MFC_STATS = 17, /* not supported */ |
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+ NL_RTA_VIA = 18, /* binary, struct rtvia */ |
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+ NL_RTA_NEWDST = 19, /* not supported */ |
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+ NL_RTA_PREF = 20, /* not supported */ |
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+ NL_RTA_ENCAP_TYPE = 21, /* not supported */ |
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+ NL_RTA_ENCAP = 22, /* not supported */ |
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+ NL_RTA_EXPIRES = 23, /* u32, seconds till expiration */ |
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+ NL_RTA_PAD = 24, /* not supported */ |
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+ NL_RTA_UID = 25, /* not supported */ |
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+ NL_RTA_TTL_PROPAGATE = 26, /* not supported */ |
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+ NL_RTA_IP_PROTO = 27, /* not supported */ |
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+ NL_RTA_SPORT = 28, /* not supported */ |
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+ NL_RTA_DPORT = 29, /* not supported */ |
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+ NL_RTA_NH_ID = 30, /* u32, nexthop/nexthop group index */ |
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+ __RTA_MAX |
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+}; |
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+#define NL_RTA_MAX (__RTA_MAX - 1) |
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+ |
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+/* |
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+ * Attributes that can be used as filters: |
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+ * |
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+ */ |
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+ |
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+#ifndef _KERNEL |
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+/* |
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+ * RTA_* space has clashes with rtsock namespace. |
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+ * Use NL_RTA_ prefix in the kernel and map to |
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+ * RTA_ for userland. |
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+ */ |
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+#define RTA_UNSPEC NL_RTA_UNSPEC |
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+#define RTA_DST NL_RTA_DST |
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+#define RTA_SRC NL_RTA_SRC |
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+#define RTA_IIF NL_RTA_IIF |
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+#define RTA_OIF NL_RTA_OIF |
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+#define RTA_GATEWAY NL_RTA_GATEWAY |
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+#define RTA_PRIORITY NL_RTA_PRIORITY |
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+#define RTA_PREFSRC NL_RTA_PREFSRC |
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+#define RTA_METRICS NL_RTA_METRICS |
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+#define RTA_MULTIPATH NL_RTA_MULTIPATH |
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+#define RTA_PROTOINFO NL_RTA_PROTOINFO |
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+#define RTA_KNH_ID NL_RTA_KNH_ID |
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+#define RTA_FLOW NL_RTA_FLOW |
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+#define RTA_CACHEINFO NL_RTA_CACHEINFO |
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+#define RTA_SESSION NL_RTA_SESSION |
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+#define RTA_MP_ALGO NL_RTA_MP_ALGO |
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+#define RTA_TABLE NL_RTA_TABLE |
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+#define RTA_MARK NL_RTA_MARK |
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+#define RTA_MFC_STATS NL_RTA_MFC_STATS |
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+#define RTA_VIA NL_RTA_VIA |
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+#define RTA_NEWDST NL_RTA_NEWDST |
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+#define RTA_PREF NL_RTA_PREF |
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+#define RTA_ENCAP_TYPE NL_RTA_ENCAP_TYPE |
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+#define RTA_ENCAP NL_RTA_ENCAP |
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+#define RTA_EXPIRES NL_RTA_EXPIRES |
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+#define RTA_PAD NL_RTA_PAD |
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+#define RTA_UID NL_RTA_UID |
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+#define RTA_TTL_PROPAGATE NL_RTA_TTL_PROPAGATE |
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+#define RTA_IP_PROTO NL_RTA_IP_PROTO |
| 226 |
+#define RTA_SPORT NL_RTA_SPORT |
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+#define RTA_DPORT NL_RTA_DPORT |
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+#define RTA_NH_ID NL_RTA_NH_ID |
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+#define RTA_MAX NL_RTA_MAX |
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+#endif |
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+ |
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+/* route attribute header */ |
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+struct rtattr { |
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+ unsigned short rta_len; |
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+ unsigned short rta_type; |
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+}; |
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+ |
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+#define NL_RTA_ALIGN_SIZE NL_ITEM_ALIGN_SIZE |
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+#define NL_RTA_ALIGN NL_ITEM_ALIGN |
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+#define NL_RTA_HDRLEN ((int)sizeof(struct rtattr)) |
| 241 |
+#define NL_RTA_DATA_LEN(_rta) ((int)((_rta)->rta_len - NL_RTA_HDRLEN)) |
| 242 |
+#define NL_RTA_DATA(_rta) NL_ITEM_DATA(_rta, NL_RTA_HDRLEN) |
| 243 |
+#define NL_RTA_DATA_CONST(_rta) NL_ITEM_DATA_CONST(_rta, NL_RTA_HDRLEN) |
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+ |
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+/* Compatibility attribute handling helpers */ |
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+#ifndef _KERNEL |
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+#define RTA_ALIGNTO NL_RTA_ALIGN_SIZE |
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+#define RTA_ALIGN(_len) NL_RTA_ALIGN(_len) |
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+#define _RTA_LEN(_rta) ((int)(_rta)->rta_len) |
| 250 |
+#define _RTA_ALIGNED_LEN(_rta) RTA_ALIGN(_RTA_LEN(_rta)) |
| 251 |
+#define RTA_OK(_rta, _len) NL_ITEM_OK(_rta, _len, NL_RTA_HDRLEN, _RTA_LEN) |
| 252 |
+#define RTA_NEXT(_rta, _len) NL_ITEM_ITER(_rta, _len, _RTA_ALIGNED_LEN) |
| 253 |
+#define RTA_LENGTH(_len) (NL_RTA_HDRLEN + (_len)) |
| 254 |
+#define RTA_SPACE(_len) RTA_ALIGN(RTA_LENGTH(_len)) |
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+#define RTA_DATA(_rta) NL_RTA_DATA(_rta) |
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+#define RTA_PAYLOAD(_rta) ((int)(_RTA_LEN(_rta) - NL_RTA_HDRLEN)) |
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+#endif |
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+ |
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+/* RTA attribute headers */ |
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+ |
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+/* RTA_VIA */ |
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+struct rtvia { |
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+ sa_family_t rtvia_family; |
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+ uint8_t rtvia_addr[0]; |
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+}; |
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+ |
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+/* |
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+ * RTA_METRICS is a nested attribute, consisting of a list of |
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+ * TLVs with types defined below. |
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+ */ |
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+ enum { |
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+ NL_RTAX_UNSPEC, |
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+ NL_RTAX_LOCK = 1, /* not supported */ |
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+ NL_RTAX_MTU = 2, /* desired path MTU */ |
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+ NL_RTAX_WINDOW = 3, /* not supported */ |
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+ NL_RTAX_RTT = 4, /* not supported */ |
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+ NL_RTAX_RTTVAR = 5, /* not supported */ |
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+ NL_RTAX_SSTHRESH = 6, /* not supported */ |
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+ NL_RTAX_CWND = 7, /* not supported */ |
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+ NL_RTAX_ADVMSS = 8, /* not supported */ |
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+ NL_RTAX_REORDERING = 9, /* not supported */ |
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+ NL_RTAX_HOPLIMIT = 10, /* not supported */ |
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+ NL_RTAX_INITCWND = 11, /* not supporrted */ |
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+ NL_RTAX_FEATURES = 12, /* not supported */ |
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+ NL_RTAX_RTO_MIN = 13, /* not supported */ |
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+ NL_RTAX_INITRWND = 14, /* not supported */ |
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+ NL_RTAX_QUICKACK = 15, /* not supported */ |
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+ NL_RTAX_CC_ALGO = 16, /* not supported */ |
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+ NL_RTAX_FASTOPEN_NO_COOKIE = 17, /* not supported */ |
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+ __NL_RTAX_MAX |
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+}; |
| 292 |
+#define NL_RTAX_MAX (__NL_RTAX_MAX - 1) |
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+ |
| 294 |
+#define RTAX_FEATURE_ECN (1 << 0) |
| 295 |
+#define RTAX_FEATURE_SACK (1 << 1) |
| 296 |
+#define RTAX_FEATURE_TIMESTAMP (1 << 2) |
| 297 |
+#define RTAX_FEATURE_ALLFRAG (1 << 3) |
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+ |
| 299 |
+#define RTAX_FEATURE_MASK \ |
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+ (RTAX_FEATURE_ECN | RTAX_FEATURE_SACK | RTAX_FEATURE_TIMESTAMP | \ |
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+ RTAX_FEATURE_ALLFRAG) |
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+ |
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+#ifndef _KERNEL |
| 304 |
+ |
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+/* |
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+ * RTAX_* space clashes with rtsock namespace. |
| 307 |
+ * Use NL_RTAX_ prefix in the kernel and map to |
| 308 |
+ * RTAX_ for userland. |
| 309 |
+ */ |
| 310 |
+#define RTAX_UNSPEC NL_RTAX_UNSPEC |
| 311 |
+#define RTAX_LOCK NL_RTAX_LOCK |
| 312 |
+#define RTAX_MTU NL_RTAX_MTU |
| 313 |
+#define RTAX_WINDOW NL_RTAX_WINDOW |
| 314 |
+#define RTAX_RTT NL_RTAX_RTT |
| 315 |
+#define RTAX_RTTVAR NL_RTAX_RTTVAR |
| 316 |
+#define RTAX_SSTHRESH NL_RTAX_SSTHRESH |
| 317 |
+#define RTAX_CWND NL_RTAX_CWND |
| 318 |
+#define RTAX_ADVMSS NL_RTAX_ADVMSS |
| 319 |
+#define RTAX_REORDERING NL_RTAX_REORDERING |
| 320 |
+#define RTAX_HOPLIMIT NL_RTAX_HOPLIMIT |
| 321 |
+#define RTAX_INITCWND NL_RTAX_INITCWND |
| 322 |
+#define RTAX_FEATURES NL_RTAX_FEATURES |
| 323 |
+#define RTAX_RTO_MIN NL_RTAX_RTO_MIN |
| 324 |
+#define RTAX_INITRWND NL_RTAX_INITRWND |
| 325 |
+#define RTAX_QUICKACK NL_RTAX_QUICKACK |
| 326 |
+#define RTAX_CC_ALGO NL_RTAX_CC_ALGO |
| 327 |
+#define RTAX_FASTOPEN_NO_COOKIE NL_RTAX_FASTOPEN_NO_COOKIE |
| 328 |
+#endif |
| 329 |
+ |
| 330 |
+/* |
| 331 |
+ * RTA_MULTIPATH consists of an array of rtnexthop structures. |
| 332 |
+ * Each rtnexthop structure contains RTA_GATEWAY or RTA_VIA |
| 333 |
+ * attribute following the header. |
| 334 |
+ */ |
| 335 |
+struct rtnexthop { |
| 336 |
+ unsigned short rtnh_len; |
| 337 |
+ unsigned char rtnh_flags; |
| 338 |
+ unsigned char rtnh_hops; /* nexthop weight */ |
| 339 |
+ int rtnh_ifindex; |
| 340 |
+}; |
| 341 |
+ |
| 342 |
+/* rtnh_flags */ |
| 343 |
+#define RTNH_F_DEAD 0x01 /* not supported */ |
| 344 |
+#define RTNH_F_PERVASIVE 0x02 /* not supported */ |
| 345 |
+#define RTNH_F_ONLINK 0x04 /* not supported */ |
| 346 |
+#define RTNH_F_OFFLOAD 0x08 /* not supported */ |
| 347 |
+#define RTNH_F_LINKDOWN 0x10 /* not supported */ |
| 348 |
+#define RTNH_F_UNRESOLVED 0x20 /* not supported */ |
| 349 |
+#define RTNH_F_TRAP 0x40 /* not supported */ |
| 350 |
+ |
| 351 |
+#define RTNH_COMPARE_MASK (RTNH_F_DEAD | RTNH_F_LINKDOWN | \ |
| 352 |
+ RTNH_F_OFFLOAD | RTNH_F_TRAP) |
| 353 |
+ |
| 354 |
+/* Macros to handle hexthops */ |
| 355 |
+#define RTNH_ALIGNTO NL_ITEM_ALIGN_SIZE |
| 356 |
+#define RTNH_ALIGN(_len) NL_ITEM_ALIGN(_len) |
| 357 |
+#define RTNH_HDRLEN ((int)sizeof(struct rtnexthop)) |
| 358 |
+#define _RTNH_LEN(_nh) ((int)(_nh)->rtnh_len) |
| 359 |
+#define _RTNH_ALIGNED_LEN(_nh) RTNH_ALIGN(_RTNH_LEN(_nh)) |
| 360 |
+#define RTNH_OK(_nh, _len) NL_ITEM_OK(_nh, _len, RTNH_HDRLEN, _RTNH_LEN) |
| 361 |
+#define RTNH_NEXT(_nh) ((struct rtnexthop *)((char *)(_nh) + _RTNH_ALIGNED_LEN(_nh))) |
| 362 |
+#define RTNH_LENGTH(_len) (RTNH_HDRLEN + (_len)) |
| 363 |
+#define RTNH_SPACE(_len) RTNH_ALIGN(RTNH_LENGTH(_len)) |
| 364 |
+#define RTNH_DATA(_nh) ((struct rtattr *)NL_ITEM_DATA(_nh, RTNH_HDRLEN)) |
| 365 |
+ |
| 366 |
+struct rtgenmsg { |
| 367 |
+ unsigned char rtgen_family; |
| 368 |
+}; |
| 369 |
+ |
| 370 |
+#endif |