Attachment 211136 Details for Bug 243675 – tool triggering the problem

tool triggering the problem

sendudp+opt.c (text/plain), 1.87 KB, created by Francis Dupont on 2020-01-28 17:09:55 UTC

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Creator: Francis Dupont

Created: 2020-01-28 17:09:55 UTC

Size: 1.87 KB

patch

obsolete

>/*
> * Send to an UDP socket with a pad destination option.
> *
> * Francis Dupont <fdupont@isc.org> January 2020
> */
>
>#include <sys/param.h>
>#include <sys/socket.h>
>
>#ifdef __APPLE__
>#define __APPLE_USE_RFC_3542
>#endif
>
>#include <netinet/in.h>
>#include <netinet/ip6.h>
>
>#include <arpa/inet.h>
>
>#include <err.h>
>#include <errno.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <unistd.h>
>
>struct sockaddr_in6 sin6;
>int s;
>socklen_t slen;
>char src[INET6_ADDRSTRLEN];
>uint8_t dstopt[8];
>struct ip6_opt *opt;
>uint8_t pack[8000];
>int cc;
>
>
>int
>main(int argc, char *argv[])
>{
>	if (argc != 2)
>		errx(1, "usage: %s <dst>", argv[0]);
>
>	memset(&sin6, 0, sizeof(sin6));
>	sin6.sin6_family = AF_INET6;
>#ifdef BSD
>	sin6.sin6_len = sizeof(sin6);
>#endif
>	sin6.sin6_port = htons(12345);
>	if (inet_pton(AF_INET6, argv[1], &sin6.sin6_addr) != 1)
>		err(1, "inet_pton(%s)", argv[1]);
>	s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
>	if (s < 0)
>		err(1, "socket");
>	if (connect(s, (struct sockaddr *)&sin6, sizeof(sin6)) < 0)
>		err(1, "connect");
>	memset(&sin6, 0, sizeof(sin6));
>	slen = sizeof(sin6);
>	if (getsockname(s, (struct sockaddr *)&sin6, &slen) < 0)
>		err(1, "getsockname");
>	if (sin6.sin6_family != AF_INET6)
>		errx(1, "bad family %d", (int)sin6.sin6_family);
>	if (inet_ntop(sin6.sin6_family, &sin6.sin6_addr, src,
>		      sizeof(src)) == NULL)
>		err(1, "inet_ntop");
>	memset(&dstopt, 0, sizeof(dstopt));
>	opt = (struct ip6_opt *)&dstopt[sizeof(struct ip6_ext)];
>	opt->ip6o_type = IP6OPT_PADN;
>	opt->ip6o_len = 4;
>	if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, dstopt,
>		       sizeof(dstopt)) < 0)
>		err(1, "setsockopt(IPV6_DSTOPTS)");
>	for (;;) {
>		memset(pack, 0, sizeof(pack));
>		printf("send %s -> %s:\n", src, argv[1]);
>		cc = read(0, pack, sizeof(pack));
>		if (cc < 0)
>			err(1, "read");
>		if (cc == 0)
>			exit(0);
>		if (send(s, pack, cc, 0) < 0)
>			err(1, "send");
>	}
>	errx(1, "exit loop");
>}

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Attachments on bug 243675: 211135 | 211136