1 /* $KAME: traceroute6.c,v 1.68 2004/01/25 11:16:12 suz Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Copyright (c) 1990, 1993
36 * The Regents of the University of California. All rights reserved.
38 * This code is derived from software contributed to Berkeley by
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 static const char copyright[] =
68 "@(#) Copyright (c) 1990, 1993\n\
69 The Regents of the University of California. All rights reserved.\n";
74 static char sccsid[] = "@(#)traceroute.c 8.1 (Berkeley) 6/6/93";
76 static const char rcsid[] =
81 * traceroute host - trace the route ip packets follow going to "host".
83 * Attempt to trace the route an ip packet would follow to some
84 * internet host. We find out intermediate hops by launching probe
85 * packets with a small ttl (time to live) then listening for an
86 * icmp "time exceeded" reply from a gateway. We start our probes
87 * with a ttl of one and increase by one until we get an icmp "port
88 * unreachable" (which means we got to "host") or hit a max (which
89 * defaults to 30 hops & can be changed with the -m flag). Three
90 * probes (change with -q flag) are sent at each ttl setting and a
91 * line is printed showing the ttl, address of the gateway and
92 * round trip time of each probe. If the probe answers come from
93 * different gateways, the address of each responding system will
94 * be printed. If there is no response within a 5 sec. timeout
95 * interval (changed with the -w flag), a "*" is printed for that
98 * Probe packets are UDP format. We don't want the destination
99 * host to process them so the destination port is set to an
100 * unlikely value (if some clod on the destination is using that
101 * value, it can be changed with the -p flag).
103 * A sample use might be:
105 * [yak 71]% traceroute nis.nsf.net.
106 * traceroute to nis.nsf.net (35.1.1.48), 30 hops max, 56 byte packet
107 * 1 helios.ee.lbl.gov (128.3.112.1) 19 ms 19 ms 0 ms
108 * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms
109 * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms
110 * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 39 ms
111 * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 39 ms 39 ms 39 ms
112 * 6 128.32.197.4 (128.32.197.4) 40 ms 59 ms 59 ms
113 * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 59 ms
114 * 8 129.140.70.13 (129.140.70.13) 99 ms 99 ms 80 ms
115 * 9 129.140.71.6 (129.140.71.6) 139 ms 239 ms 319 ms
116 * 10 129.140.81.7 (129.140.81.7) 220 ms 199 ms 199 ms
117 * 11 nic.merit.edu (35.1.1.48) 239 ms 239 ms 239 ms
119 * Note that lines 2 & 3 are the same. This is due to a buggy
120 * kernel on the 2nd hop system -- lbl-csam.arpa -- that forwards
121 * packets with a zero ttl.
123 * A more interesting example is:
125 * [yak 72]% traceroute allspice.lcs.mit.edu.
126 * traceroute to allspice.lcs.mit.edu (18.26.0.115), 30 hops max
127 * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms
128 * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 19 ms 19 ms
129 * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 19 ms
130 * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 19 ms 39 ms 39 ms
131 * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 20 ms 39 ms 39 ms
132 * 6 128.32.197.4 (128.32.197.4) 59 ms 119 ms 39 ms
133 * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 39 ms
134 * 8 129.140.70.13 (129.140.70.13) 80 ms 79 ms 99 ms
135 * 9 129.140.71.6 (129.140.71.6) 139 ms 139 ms 159 ms
136 * 10 129.140.81.7 (129.140.81.7) 199 ms 180 ms 300 ms
137 * 11 129.140.72.17 (129.140.72.17) 300 ms 239 ms 239 ms
139 * 13 128.121.54.72 (128.121.54.72) 259 ms 499 ms 279 ms
144 * 18 ALLSPICE.LCS.MIT.EDU (18.26.0.115) 339 ms 279 ms 279 ms
146 * (I start to see why I'm having so much trouble with mail to
147 * MIT.) Note that the gateways 12, 14, 15, 16 & 17 hops away
148 * either don't send ICMP "time exceeded" messages or send them
149 * with a ttl too small to reach us. 14 - 17 are running the
150 * MIT C Gateway code that doesn't send "time exceeded"s. God
151 * only knows what's going on with 12.
153 * The silent gateway 12 in the above may be the result of a bug in
154 * the 4.[23]BSD network code (and its derivatives): 4.x (x <= 3)
155 * sends an unreachable message using whatever ttl remains in the
156 * original datagram. Since, for gateways, the remaining ttl is
157 * zero, the icmp "time exceeded" is guaranteed to not make it back
158 * to us. The behavior of this bug is slightly more interesting
159 * when it appears on the destination system:
161 * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms
162 * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 39 ms
163 * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 39 ms 19 ms
164 * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 19 ms
165 * 5 ccn-nerif35.Berkeley.EDU (128.32.168.35) 39 ms 39 ms 39 ms
166 * 6 csgw.Berkeley.EDU (128.32.133.254) 39 ms 59 ms 39 ms
173 * 13 rip.Berkeley.EDU (128.32.131.22) 59 ms ! 39 ms ! 39 ms !
175 * Notice that there are 12 "gateways" (13 is the final
176 * destination) and exactly the last half of them are "missing".
177 * What's really happening is that rip (a Sun-3 running Sun OS3.5)
178 * is using the ttl from our arriving datagram as the ttl in its
179 * icmp reply. So, the reply will time out on the return path
180 * (with no notice sent to anyone since icmp's aren't sent for
181 * icmp's) until we probe with a ttl that's at least twice the path
182 * length. I.e., rip is really only 7 hops away. A reply that
183 * returns with a ttl of 1 is a clue this problem exists.
184 * Traceroute prints a "!" after the time if the ttl is <= 1.
185 * Since vendors ship a lot of obsolete (DEC's Ultrix, Sun 3.x) or
186 * non-standard (HPUX) software, expect to see this problem
187 * frequently and/or take care picking the target host of your
190 * Other possible annotations after the time are !H, !N, !P (got a host,
191 * network or protocol unreachable, respectively), !S or !F (source
192 * route failed or fragmentation needed -- neither of these should
193 * ever occur and the associated gateway is busted if you see one). If
194 * almost all the probes result in some kind of unreachable, traceroute
195 * will give up and exit.
199 * This program must be run by root or be setuid. (I suggest that
200 * you *don't* make it setuid -- casual use could result in a lot
201 * of unnecessary traffic on our poor, congested nets.)
203 * This program requires a kernel mod that does not appear in any
204 * system available from Berkeley: A raw ip socket using proto
205 * IPPROTO_RAW must interpret the data sent as an ip datagram (as
206 * opposed to data to be wrapped in an ip datagram). See the README
207 * file that came with the source to this program for a description
208 * of the mods I made to /sys/netinet/raw_ip.c. Your mileage may
209 * vary. But, again, ANY 4.x (x < 4) BSD KERNEL WILL HAVE TO BE
210 * MODIFIED TO RUN THIS PROGRAM.
212 * The udp port usage may appear bizarre (well, ok, it is bizarre).
213 * The problem is that an icmp message only contains 8 bytes of
214 * data from the original datagram. 8 bytes is the size of a udp
215 * header so, if we want to associate replies with the original
216 * datagram, the necessary information must be encoded into the
217 * udp header (the ip id could be used but there's no way to
218 * interlock with the kernel's assignment of ip id's and, anyway,
219 * it would have taken a lot more kernel hacking to allow this
220 * code to set the ip id). So, to allow two or more users to
221 * use traceroute simultaneously, we use this task's pid as the
222 * source port (the high bit is set to move the port number out
223 * of the "likely" range). To keep track of which probe is being
224 * replied to (so times and/or hop counts don't get confused by a
225 * reply that was delayed in transit), we increment the destination
226 * port number before each probe.
228 * Don't use this as a coding example. I was trying to find a
229 * routing problem and this code sort-of popped out after 48 hours
230 * without sleep. I was amazed it ever compiled, much less ran.
232 * I stole the idea for this program from Steve Deering. Since
233 * the first release, I've learned that had I attended the right
234 * IETF working group meetings, I also could have stolen it from Guy
235 * Almes or Matt Mathis. I don't know (or care) who came up with
236 * the idea first. I envy the originators' perspicacity and I'm
237 * glad they didn't keep the idea a secret.
239 * Tim Seaver, Ken Adelman and C. Philip Wood provided bug fixes and/or
240 * enhancements to the original distribution.
242 * I've hacked up a round-trip-route version of this that works by
243 * sending a loose-source-routed udp datagram through the destination
244 * back to yourself. Unfortunately, SO many gateways botch source
245 * routing, the thing is almost worthless. Maybe one day...
247 * -- Van Jacobson (van@helios.ee.lbl.gov)
248 * Tue Dec 20 03:50:13 PST 1988
251 #include <sys/param.h>
252 #include <sys/time.h>
253 #include <sys/socket.h>
255 #include <sys/file.h>
256 #include <sys/ioctl.h>
257 #include <sys/sysctl.h>
259 #include <netinet/in.h>
261 #include <arpa/inet.h>
274 #include <netinet/ip6.h>
275 #include <netinet/icmp6.h>
276 #include <netinet/sctp.h>
277 #include <netinet/sctp_header.h>
278 #include <netinet/tcp.h>
279 #include <netinet/udp.h>
282 #include <net/route.h>
283 #include <netipsec/ipsec.h>
288 #define DUMMY_PORT 10010
290 #define MAXPACKET 65535 /* max ip packet size */
292 #ifndef HAVE_GETIPNODEBYNAME
293 #define getipnodebyname(x, y, z, u) gethostbyname2((x), (y))
294 #define freehostent(x)
297 u_char packet[512]; /* last inbound (icmp) packet */
298 char *outpacket; /* last output packet */
300 int main(int, char *[]);
301 int wait_for_reply(int, struct msghdr *);
303 #ifdef IPSEC_POLICY_IPSEC
304 int setpolicy(int so, char *policy);
307 void send_probe(int, u_long);
308 void *get_uphdr(struct ip6_hdr *, u_char *);
309 int get_hoplim(struct msghdr *);
310 double deltaT(struct timeval *, struct timeval *);
311 const char *pr_type(int);
312 int packet_ok(struct msghdr *, int, int);
313 void print(struct msghdr *, int);
314 const char *inetname(struct sockaddr *);
315 u_int32_t sctp_crc32c(void *, u_int32_t);
316 u_int16_t in_cksum(u_int16_t *addr, int);
317 u_int16_t tcp_chksum(struct sockaddr_in6 *, struct sockaddr_in6 *,
321 int rcvsock; /* receive (icmp) socket file descriptor */
322 int sndsock; /* send (raw/udp) socket file descriptor */
324 struct msghdr rcvmhdr;
325 struct iovec rcviov[2];
327 struct in6_pktinfo *rcvpktinfo;
329 struct sockaddr_in6 Src, Dst, Rcv;
330 u_long datalen = 20; /* How much data */
331 #define ICMP6ECHOLEN 8
332 /* XXX: 2064 = 127(max hops in type 0 rthdr) * sizeof(ip6_hdr) + 16(margin) */
334 #ifdef USE_RFC2292BIS
335 struct ip6_rthdr *rth;
337 struct cmsghdr *cmsg;
343 u_long first_hop = 1;
344 u_long max_hops = 30;
346 u_int16_t port = 32768+666; /* start udp dest port # for probe packets */
348 int options; /* socket options */
350 int waittime = 5; /* time to wait for response (in seconds) */
351 int nflag; /* print addresses numerically */
352 int useproto = IPPROTO_UDP; /* protocol to use to send packet */
353 int lflag; /* print both numerical address & hostname */
354 int as_path; /* print as numbers for each hop */
355 char *as_server = NULL;
359 main(int argc, char *argv[])
361 int mib[4] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_DEFHLIM };
362 char hbuf[NI_MAXHOST], src0[NI_MAXHOST], *ep;
363 int ch, i, on = 1, seq, rcvcmsglen, error;
364 struct addrinfo hints, *res;
365 static u_char *rcvcmsgbuf;
366 u_long probe, hops, lport;
374 if ((rcvsock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) {
375 perror("socket(ICMPv6)");
380 (void) sysctl(mib, sizeof(mib)/sizeof(mib[0]), &i, &size, NULL, 0);
383 /* specify to tell receiving interface */
384 #ifdef IPV6_RECVPKTINFO
385 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on,
387 err(1, "setsockopt(IPV6_RECVPKTINFO)");
388 #else /* old adv. API */
389 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_PKTINFO, &on,
391 err(1, "setsockopt(IPV6_PKTINFO)");
394 /* specify to tell value of hoplimit field of received IP6 hdr */
395 #ifdef IPV6_RECVHOPLIMIT
396 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on,
398 err(1, "setsockopt(IPV6_RECVHOPLIMIT)");
399 #else /* old adv. API */
400 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_HOPLIMIT, &on,
402 err(1, "setsockopt(IPV6_HOPLIMIT)");
406 ident = htons(getpid() & 0xffff); /* same as ping6 */
408 while ((ch = getopt(argc, argv, "aA:df:g:Ilm:nNp:q:rs:STUvw:")) != -1)
423 first_hop = strtoul(optarg, &ep, 0);
424 if (errno || !*optarg || *ep || first_hop > 255) {
426 "traceroute6: invalid min hoplimit.\n");
431 hp = getipnodebyname(optarg, AF_INET6, 0, &h_errno);
434 "traceroute6: unknown host %s\n", optarg);
437 #ifdef USE_RFC2292BIS
440 * XXX: We can't detect the number of
441 * intermediate nodes yet.
443 if ((rth = inet6_rth_init((void *)rtbuf,
444 sizeof(rtbuf), IPV6_RTHDR_TYPE_0,
447 "inet6_rth_init failed.\n");
451 if (inet6_rth_add((void *)rth,
452 (struct in6_addr *)hp->h_addr)) {
454 "inet6_rth_add failed for %s\n",
458 #else /* old advanced API */
460 cmsg = inet6_rthdr_init(rtbuf, IPV6_RTHDR_TYPE_0);
461 inet6_rthdr_add(cmsg, (struct in6_addr *)hp->h_addr,
467 useproto = IPPROTO_ICMPV6;
475 max_hops = strtoul(optarg, &ep, 0);
476 if (errno || !*optarg || *ep || max_hops > 255) {
478 "traceroute6: invalid max hoplimit.\n");
486 useproto = IPPROTO_NONE;
491 lport = strtoul(optarg, &ep, 0);
492 if (errno || !*optarg || *ep) {
493 fprintf(stderr, "traceroute6: invalid port.\n");
496 if (lport == 0 || lport != (lport & 0xffff)) {
498 "traceroute6: port out of range.\n");
501 port = lport & 0xffff;
506 nprobes = strtoul(optarg, &ep, 0);
507 if (errno || !*optarg || *ep) {
509 "traceroute6: invalid nprobes.\n");
514 "traceroute6: nprobes must be >0.\n");
519 options |= SO_DONTROUTE;
523 * set the ip source address of the outbound
524 * probe (e.g., on a multi-homed host).
529 useproto = IPPROTO_SCTP;
532 useproto = IPPROTO_TCP;
535 useproto = IPPROTO_UDP;
543 waittime = strtoul(optarg, &ep, 0);
544 if (errno || !*optarg || *ep) {
546 "traceroute6: invalid wait time.\n");
551 "traceroute6: wait must be >= 1 sec.\n");
562 * Open socket to send probe packets.
569 if ((sndsock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
570 perror("socket(SOCK_DGRAM)");
577 if ((sndsock = socket(AF_INET6, SOCK_RAW, useproto)) < 0) {
578 perror("socket(SOCK_RAW)");
583 fprintf(stderr, "traceroute6: unknown probe protocol %d\n",
587 if (max_hops < first_hop) {
589 "traceroute6: max hoplimit must be larger than first hoplimit.\n");
595 if (setresuid(uid, uid, uid) == -1) {
601 if (argc < 1 || argc > 2)
605 setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
610 memset(&hints, 0, sizeof(hints));
611 hints.ai_family = PF_INET6;
612 hints.ai_socktype = SOCK_RAW;
613 hints.ai_protocol = IPPROTO_ICMPV6;
614 hints.ai_flags = AI_CANONNAME;
615 error = getaddrinfo(*argv, NULL, &hints, &res);
618 "traceroute6: %s\n", gai_strerror(error));
621 if (res->ai_addrlen != sizeof(Dst)) {
623 "traceroute6: size of sockaddr mismatch\n");
626 memcpy(&Dst, res->ai_addr, res->ai_addrlen);
627 hostname = res->ai_canonname ? strdup(res->ai_canonname) : *argv;
629 fprintf(stderr, "traceroute6: not enough core\n");
633 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf,
634 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
635 strlcpy(hbuf, "?", sizeof(hbuf));
636 fprintf(stderr, "traceroute6: Warning: %s has multiple "
637 "addresses; using %s\n", hostname, hbuf);
643 datalen = strtoul(*argv, &ep, 0);
646 "traceroute6: invalid packet length.\n");
652 minlen = ICMP6ECHOLEN;
655 minlen = sizeof(struct udphdr);
662 minlen = sizeof(struct sctphdr);
665 minlen = sizeof(struct tcphdr);
668 fprintf(stderr, "traceroute6: unknown probe protocol %d.\n",
672 if (datalen < minlen)
674 else if (datalen >= MAXPACKET) {
676 "traceroute6: packet size must be %zu <= s < %d.\n",
680 if (useproto == IPPROTO_UDP)
681 datalen -= sizeof(struct udphdr);
682 if ((useproto == IPPROTO_SCTP) && (datalen & 3)) {
684 "traceroute6: packet size must be a multiple of 4.\n");
687 outpacket = malloc(datalen);
692 (void) bzero((char *)outpacket, datalen);
694 /* initialize msghdr for receiving packets */
695 rcviov[0].iov_base = (caddr_t)packet;
696 rcviov[0].iov_len = sizeof(packet);
697 rcvmhdr.msg_name = (caddr_t)&Rcv;
698 rcvmhdr.msg_namelen = sizeof(Rcv);
699 rcvmhdr.msg_iov = rcviov;
700 rcvmhdr.msg_iovlen = 1;
701 rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
702 CMSG_SPACE(sizeof(int));
703 if ((rcvcmsgbuf = malloc(rcvcmsglen)) == NULL) {
704 fprintf(stderr, "traceroute6: malloc failed\n");
707 rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf;
708 rcvmhdr.msg_controllen = rcvcmsglen;
710 if (options & SO_DEBUG)
711 (void) setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG,
712 (char *)&on, sizeof(on));
713 if (options & SO_DONTROUTE)
714 (void) setsockopt(rcvsock, SOL_SOCKET, SO_DONTROUTE,
715 (char *)&on, sizeof(on));
717 #ifdef IPSEC_POLICY_IPSEC
719 * do not raise error even if setsockopt fails, kernel may have ipsec
722 if (setpolicy(rcvsock, "in bypass") < 0)
723 errx(1, "%s", ipsec_strerror());
724 if (setpolicy(rcvsock, "out bypass") < 0)
725 errx(1, "%s", ipsec_strerror());
728 int level = IPSEC_LEVEL_NONE;
730 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level,
732 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level,
734 #ifdef IP_AUTH_TRANS_LEVEL
735 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level,
738 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level,
741 #ifdef IP_AUTH_NETWORK_LEVEL
742 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level,
746 #endif /*IPSEC_POLICY_IPSEC*/
753 if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&i,
755 perror("setsockopt(SO_SNDBUF)");
758 #endif /* SO_SNDBUF */
759 if (options & SO_DEBUG)
760 (void) setsockopt(sndsock, SOL_SOCKET, SO_DEBUG,
761 (char *)&on, sizeof(on));
762 if (options & SO_DONTROUTE)
763 (void) setsockopt(sndsock, SOL_SOCKET, SO_DONTROUTE,
764 (char *)&on, sizeof(on));
765 #ifdef USE_RFC2292BIS
766 if (rth) {/* XXX: there is no library to finalize the header... */
767 rth->ip6r_len = rth->ip6r_segleft * 2;
768 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_RTHDR,
769 (void *)rth, (rth->ip6r_len + 1) << 3)) {
770 fprintf(stderr, "setsockopt(IPV6_RTHDR): %s\n",
775 #else /* old advanced API */
777 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE);
778 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_PKTOPTIONS,
779 rtbuf, cmsg->cmsg_len) < 0) {
780 fprintf(stderr, "setsockopt(IPV6_PKTOPTIONS): %s\n",
785 #endif /* USE_RFC2292BIS */
787 #ifdef IPSEC_POLICY_IPSEC
789 * do not raise error even if setsockopt fails, kernel may have ipsec
792 if (setpolicy(sndsock, "in bypass") < 0)
793 errx(1, "%s", ipsec_strerror());
794 if (setpolicy(sndsock, "out bypass") < 0)
795 errx(1, "%s", ipsec_strerror());
798 int level = IPSEC_LEVEL_BYPASS;
800 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level,
802 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level,
804 #ifdef IP_AUTH_TRANS_LEVEL
805 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level,
808 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level,
811 #ifdef IP_AUTH_NETWORK_LEVEL
812 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level,
816 #endif /*IPSEC_POLICY_IPSEC*/
822 bzero(&Src, sizeof(Src));
824 struct addrinfo hints, *res;
827 memset(&hints, 0, sizeof(hints));
828 hints.ai_family = AF_INET6;
829 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
830 hints.ai_flags = AI_NUMERICHOST;
831 error = getaddrinfo(source, "0", &hints, &res);
833 printf("traceroute6: %s: %s\n", source,
834 gai_strerror(error));
837 if (res->ai_addrlen > sizeof(Src)) {
838 printf("traceroute6: %s: %s\n", source,
839 gai_strerror(error));
842 memcpy(&Src, res->ai_addr, res->ai_addrlen);
845 struct sockaddr_in6 Nxt;
850 Nxt.sin6_port = htons(DUMMY_PORT);
852 bcopy(inet6_rthdr_getaddr(cmsg, 1), &Nxt.sin6_addr,
853 sizeof(Nxt.sin6_addr));
854 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
858 if (connect(dummy, (struct sockaddr *)&Nxt, Nxt.sin6_len) < 0) {
863 if (getsockname(dummy, (struct sockaddr *)&Src, &len) < 0) {
864 perror("getsockname");
867 if (getnameinfo((struct sockaddr *)&Src, Src.sin6_len,
868 src0, sizeof(src0), NULL, 0, NI_NUMERICHOST)) {
869 fprintf(stderr, "getnameinfo failed for source\n");
876 Src.sin6_port = htons(0);
877 if (bind(sndsock, (struct sockaddr *)&Src, Src.sin6_len) < 0) {
886 if (getsockname(sndsock, (struct sockaddr *)&Src, &len) < 0) {
887 perror("getsockname");
890 srcport = ntohs(Src.sin6_port);
894 asn = as_setup(as_server);
897 "traceroute6: as_setup failed, AS# lookups"
899 (void)fflush(stderr);
907 if (getnameinfo((struct sockaddr *)&Dst, Dst.sin6_len, hbuf,
908 sizeof(hbuf), NULL, 0, NI_NUMERICHOST))
909 strlcpy(hbuf, "(invalid)", sizeof(hbuf));
910 fprintf(stderr, "traceroute6");
911 fprintf(stderr, " to %s (%s)", hostname, hbuf);
913 fprintf(stderr, " from %s", source);
914 fprintf(stderr, ", %lu hops max, %lu byte packets\n",
916 datalen + ((useproto == IPPROTO_UDP) ? sizeof(struct udphdr) : 0));
917 (void) fflush(stderr);
920 printf("Skipping %lu intermediate hops\n", first_hop - 1);
925 for (hops = first_hop; hops <= max_hops; ++hops) {
926 struct in6_addr lastaddr;
928 unsigned unreachable = 0;
930 printf("%2lu ", hops);
931 bzero(&lastaddr, sizeof(lastaddr));
932 for (probe = 0; probe < nprobes; ++probe) {
934 struct timeval t1, t2;
936 (void) gettimeofday(&t1, NULL);
937 send_probe(++seq, hops);
938 while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) {
939 (void) gettimeofday(&t2, NULL);
940 if ((i = packet_ok(&rcvmhdr, cc, seq))) {
941 if (!IN6_ARE_ADDR_EQUAL(&Rcv.sin6_addr,
944 fputs("\n ", stdout);
946 lastaddr = Rcv.sin6_addr;
948 printf(" %.3f ms", deltaT(&t1, &t2));
950 case ICMP6_DST_UNREACH_NOROUTE:
954 case ICMP6_DST_UNREACH_ADMIN:
958 case ICMP6_DST_UNREACH_NOTNEIGHBOR:
962 case ICMP6_DST_UNREACH_ADDR:
966 case ICMP6_DST_UNREACH_NOPORT:
974 } else if (deltaT(&t1, &t2) > waittime * 1000) {
981 (void) fflush(stdout);
985 (unreachable > 0 && unreachable >= ((nprobes + 1) / 2))) {
996 wait_for_reply(int sock, struct msghdr *mhdr)
999 struct pollfd pfd[1];
1003 pfd[0].events = POLLIN;
1006 if (poll(pfd, 1, waittime * 1000) > 0)
1007 cc = recvmsg(rcvsock, mhdr, 0);
1012 struct timeval wait;
1015 fdsn = howmany(sock + 1, NFDBITS) * sizeof(fd_mask);
1016 if ((fdsp = (fd_set *)malloc(fdsn)) == NULL)
1018 memset(fdsp, 0, fdsn);
1020 wait.tv_sec = waittime; wait.tv_usec = 0;
1022 if (select(sock+1, fdsp, (fd_set *)0, (fd_set *)0, &wait) > 0)
1023 cc = recvmsg(rcvsock, mhdr, 0);
1031 #ifdef IPSEC_POLICY_IPSEC
1033 setpolicy(so, policy)
1039 buf = ipsec_set_policy(policy, strlen(policy));
1041 warnx("%s", ipsec_strerror());
1044 (void)setsockopt(so, IPPROTO_IPV6, IPV6_IPSEC_POLICY,
1045 buf, ipsec_get_policylen(buf));
1055 send_probe(int seq, u_long hops)
1057 struct icmp6_hdr *icp;
1058 struct sctphdr *sctp;
1059 struct sctp_chunkhdr *chk;
1060 struct sctp_init_chunk *init;
1061 struct sctp_paramhdr *param;
1066 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
1067 (char *)&i, sizeof(i)) < 0) {
1068 perror("setsockopt IPV6_UNICAST_HOPS");
1071 Dst.sin6_port = htons(port + seq);
1074 case IPPROTO_ICMPV6:
1075 icp = (struct icmp6_hdr *)outpacket;
1077 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1078 icp->icmp6_code = 0;
1079 icp->icmp6_cksum = 0;
1080 icp->icmp6_id = ident;
1081 icp->icmp6_seq = htons(seq);
1086 /* No space for anything. No harm as seq/tv32 are decorative. */
1089 sctp = (struct sctphdr *)outpacket;
1091 sctp->src_port = htons(ident);
1092 sctp->dest_port = htons(port + seq);
1093 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1094 sizeof(struct sctp_init_chunk))) {
1097 sctp->v_tag = (sctp->src_port << 16) | sctp->dest_port;
1099 sctp->checksum = htonl(0);
1100 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1101 sizeof(struct sctp_init_chunk))) {
1103 * Send a packet containing an INIT chunk. This works
1104 * better in case of firewalls on the path, but
1105 * results in a probe packet containing at least
1106 * 32 bytes of payload. For shorter payloads, use
1107 * SHUTDOWN-ACK chunks.
1109 init = (struct sctp_init_chunk *)(sctp + 1);
1110 init->ch.chunk_type = SCTP_INITIATION;
1111 init->ch.chunk_flags = 0;
1112 init->ch.chunk_length = htons((u_int16_t)(datalen -
1113 sizeof(struct sctphdr)));
1114 init->init.initiate_tag = (sctp->src_port << 16) |
1116 init->init.a_rwnd = htonl(1500);
1117 init->init.num_outbound_streams = htons(1);
1118 init->init.num_inbound_streams = htons(1);
1119 init->init.initial_tsn = htonl(0);
1120 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1121 sizeof(struct sctp_init_chunk) +
1122 sizeof(struct sctp_paramhdr))) {
1123 param = (struct sctp_paramhdr *)(init + 1);
1124 param->param_type = htons(SCTP_PAD);
1125 param->param_length =
1126 htons((u_int16_t)(datalen -
1127 sizeof(struct sctphdr) -
1128 sizeof(struct sctp_init_chunk)));
1132 * Send a packet containing a SHUTDOWN-ACK chunk,
1133 * possibly followed by a PAD chunk.
1135 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1136 sizeof(struct sctp_chunkhdr))) {
1137 chk = (struct sctp_chunkhdr *)(sctp + 1);
1138 chk->chunk_type = SCTP_SHUTDOWN_ACK;
1139 chk->chunk_flags = 0;
1140 chk->chunk_length = htons(4);
1142 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1143 2 * sizeof(struct sctp_chunkhdr))) {
1145 chk->chunk_type = SCTP_PAD_CHUNK;
1146 chk->chunk_flags = 0;
1147 chk->chunk_length = htons((u_int16_t)(datalen -
1148 sizeof(struct sctphdr) -
1149 sizeof(struct sctp_chunkhdr)));
1152 sctp->checksum = sctp_crc32c(outpacket, datalen);
1155 tcp = (struct tcphdr *)outpacket;
1157 tcp->th_sport = htons(ident);
1158 tcp->th_dport = htons(port + seq);
1159 tcp->th_seq = (tcp->th_sport << 16) | tcp->th_dport;
1162 tcp->th_flags = TH_SYN;
1164 tcp->th_sum = tcp_chksum(&Src, &Dst, outpacket, datalen);
1167 fprintf(stderr, "Unknown probe protocol %d.\n", useproto);
1171 i = sendto(sndsock, (char *)outpacket, datalen, 0,
1172 (struct sockaddr *)&Dst, Dst.sin6_len);
1173 if (i < 0 || (u_long)i != datalen) {
1176 printf("traceroute6: wrote %s %lu chars, ret=%d\n",
1177 hostname, datalen, i);
1178 (void) fflush(stdout);
1183 get_hoplim(struct msghdr *mhdr)
1187 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1188 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1189 if (cm->cmsg_level == IPPROTO_IPV6 &&
1190 cm->cmsg_type == IPV6_HOPLIMIT &&
1191 cm->cmsg_len == CMSG_LEN(sizeof(int)))
1192 return(*(int *)CMSG_DATA(cm));
1199 deltaT(struct timeval *t1p, struct timeval *t2p)
1203 dt = (double)(t2p->tv_sec - t1p->tv_sec) * 1000.0 +
1204 (double)(t2p->tv_usec - t1p->tv_usec) / 1000.0;
1209 * Convert an ICMP "type" field to a printable string.
1214 u_char t = t0 & 0xff;
1218 case ICMP6_DST_UNREACH:
1219 cp = "Destination Unreachable";
1221 case ICMP6_PACKET_TOO_BIG:
1222 cp = "Packet Too Big";
1224 case ICMP6_TIME_EXCEEDED:
1225 cp = "Time Exceeded";
1227 case ICMP6_PARAM_PROB:
1228 cp = "Parameter Problem";
1230 case ICMP6_ECHO_REQUEST:
1231 cp = "Echo Request";
1233 case ICMP6_ECHO_REPLY:
1236 case ICMP6_MEMBERSHIP_QUERY:
1237 cp = "Group Membership Query";
1239 case ICMP6_MEMBERSHIP_REPORT:
1240 cp = "Group Membership Report";
1242 case ICMP6_MEMBERSHIP_REDUCTION:
1243 cp = "Group Membership Reduction";
1245 case ND_ROUTER_SOLICIT:
1246 cp = "Router Solicitation";
1248 case ND_ROUTER_ADVERT:
1249 cp = "Router Advertisement";
1251 case ND_NEIGHBOR_SOLICIT:
1252 cp = "Neighbor Solicitation";
1254 case ND_NEIGHBOR_ADVERT:
1255 cp = "Neighbor Advertisement";
1268 packet_ok(struct msghdr *mhdr, int cc, int seq)
1270 struct icmp6_hdr *icp;
1271 struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name;
1273 char *buf = (char *)mhdr->msg_iov[0].iov_base;
1276 char hbuf[NI_MAXHOST];
1284 ip = (struct ip6_hdr *) buf;
1285 hlen = sizeof(struct ip6_hdr);
1286 if (cc < hlen + sizeof(struct icmp6_hdr)) {
1288 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1289 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
1290 strlcpy(hbuf, "invalid", sizeof(hbuf));
1291 printf("packet too short (%d bytes) from %s\n", cc,
1297 icp = (struct icmp6_hdr *)(buf + hlen);
1299 if (cc < (int)sizeof(struct icmp6_hdr)) {
1301 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1302 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
1303 strlcpy(hbuf, "invalid", sizeof(hbuf));
1304 printf("data too short (%d bytes) from %s\n", cc, hbuf);
1308 icp = (struct icmp6_hdr *)buf;
1310 /* get optional information via advanced API */
1313 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1314 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1315 if (cm->cmsg_level == IPPROTO_IPV6 &&
1316 cm->cmsg_type == IPV6_PKTINFO &&
1318 CMSG_LEN(sizeof(struct in6_pktinfo)))
1319 rcvpktinfo = (struct in6_pktinfo *)(CMSG_DATA(cm));
1321 if (cm->cmsg_level == IPPROTO_IPV6 &&
1322 cm->cmsg_type == IPV6_HOPLIMIT &&
1323 cm->cmsg_len == CMSG_LEN(sizeof(int)))
1324 hlimp = (int *)CMSG_DATA(cm);
1326 if (rcvpktinfo == NULL || hlimp == NULL) {
1327 warnx("failed to get received hop limit or packet info");
1331 rcvhlim = 0; /*XXX*/
1337 type = icp->icmp6_type;
1338 code = icp->icmp6_code;
1339 if ((type == ICMP6_TIME_EXCEEDED && code == ICMP6_TIME_EXCEED_TRANSIT)
1340 || type == ICMP6_DST_UNREACH) {
1341 struct ip6_hdr *hip;
1342 struct icmp6_hdr *icmp;
1343 struct sctp_init_chunk *init;
1344 struct sctphdr *sctp;
1349 hip = (struct ip6_hdr *)(icp + 1);
1350 if ((up = get_uphdr(hip, (u_char *)(buf + cc))) == NULL) {
1352 warnx("failed to get upper layer header");
1356 case IPPROTO_ICMPV6:
1357 icmp = (struct icmp6_hdr *)up;
1358 if (icmp->icmp6_id == ident &&
1359 icmp->icmp6_seq == htons(seq))
1360 return (type == ICMP6_TIME_EXCEEDED ?
1364 udp = (struct udphdr *)up;
1365 if (udp->uh_sport == htons(srcport) &&
1366 udp->uh_dport == htons(port + seq))
1367 return (type == ICMP6_TIME_EXCEEDED ?
1371 sctp = (struct sctphdr *)up;
1372 if (sctp->src_port != htons(ident) ||
1373 sctp->dest_port != htons(port + seq)) {
1376 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1377 sizeof(struct sctp_init_chunk))) {
1378 if (sctp->v_tag != 0) {
1381 init = (struct sctp_init_chunk *)(sctp + 1);
1382 /* Check the initiate tag, if available. */
1383 if ((char *)&init->init.a_rwnd > buf + cc) {
1384 return (type == ICMP6_TIME_EXCEEDED ?
1387 if (init->init.initiate_tag == (u_int32_t)
1388 ((sctp->src_port << 16) | sctp->dest_port)) {
1389 return (type == ICMP6_TIME_EXCEEDED ?
1394 (u_int32_t)((sctp->src_port << 16) |
1396 return (type == ICMP6_TIME_EXCEEDED ?
1402 tcp = (struct tcphdr *)up;
1403 if (tcp->th_sport == htons(ident) &&
1404 tcp->th_dport == htons(port + seq) &&
1406 (tcp_seq)((tcp->th_sport << 16) | tcp->th_dport))
1407 return (type == ICMP6_TIME_EXCEEDED ?
1411 return (type == ICMP6_TIME_EXCEEDED ? -1 : code + 1);
1413 fprintf(stderr, "Unknown probe proto %d.\n", useproto);
1416 } else if (useproto == IPPROTO_ICMPV6 && type == ICMP6_ECHO_REPLY) {
1417 if (icp->icmp6_id == ident &&
1418 icp->icmp6_seq == htons(seq))
1419 return (ICMP6_DST_UNREACH_NOPORT + 1);
1422 char sbuf[NI_MAXHOST+1], dbuf[INET6_ADDRSTRLEN];
1426 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1427 sbuf, sizeof(sbuf), NULL, 0, NI_NUMERICHOST) != 0)
1428 strlcpy(sbuf, "invalid", sizeof(sbuf));
1429 printf("\n%d bytes from %s to %s", cc, sbuf,
1430 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1431 dbuf, sizeof(dbuf)) : "?");
1432 printf(": icmp type %d (%s) code %d\n", type, pr_type(type),
1434 p = (u_int8_t *)(icp + 1);
1436 for (i = 0; i < cc; i++) {
1441 printf("%02x", p[i]);
1442 if (i % WIDTH == WIDTH - 1)
1445 if (cc % WIDTH != 0)
1452 * Increment pointer until find the UDP or ICMP header.
1455 get_uphdr(struct ip6_hdr *ip6, u_char *lim)
1457 u_char *cp = (u_char *)ip6, nh;
1459 static u_char none_hdr[1]; /* Fake pointer for IPPROTO_NONE. */
1461 if (cp + sizeof(*ip6) > lim)
1465 cp += sizeof(struct ip6_hdr);
1467 while (lim - cp >= (nh == IPPROTO_NONE ? 0 : 8)) {
1471 case IPPROTO_ICMPV6:
1472 return(useproto == nh ? cp : NULL);
1476 return(useproto == nh ? cp : NULL);
1478 return(useproto == nh ? none_hdr : NULL);
1479 case IPPROTO_FRAGMENT:
1480 hlen = sizeof(struct ip6_frag);
1481 nh = ((struct ip6_frag *)cp)->ip6f_nxt;
1484 hlen = (((struct ip6_ext *)cp)->ip6e_len + 2) << 2;
1485 nh = ((struct ip6_ext *)cp)->ip6e_nxt;
1488 hlen = (((struct ip6_ext *)cp)->ip6e_len + 1) << 3;
1489 nh = ((struct ip6_ext *)cp)->ip6e_nxt;
1500 print(struct msghdr *mhdr, int cc)
1502 struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name;
1503 char hbuf[NI_MAXHOST];
1505 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1506 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
1507 strlcpy(hbuf, "invalid", sizeof(hbuf));
1509 printf(" [AS%u]", as_lookup(asn, hbuf, AF_INET6));
1511 printf(" %s", hbuf);
1513 printf(" %s (%s)", inetname((struct sockaddr *)from), hbuf);
1515 printf(" %s", inetname((struct sockaddr *)from));
1519 printf(" %d bytes to %s", cc,
1520 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1521 hbuf, sizeof(hbuf)) : "?");
1523 printf(" %d bytes of data to %s", cc,
1524 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1525 hbuf, sizeof(hbuf)) : "?");
1531 * Construct an Internet address representation.
1532 * If the nflag has been supplied, give
1533 * numeric value, otherwise try for symbolic name.
1536 inetname(struct sockaddr *sa)
1538 static char line[NI_MAXHOST], domain[MAXHOSTNAMELEN + 1];
1539 static int first = 1;
1542 if (first && !nflag) {
1544 if (gethostname(domain, sizeof(domain)) == 0 &&
1545 (cp = strchr(domain, '.')))
1546 (void) strlcpy(domain, cp + 1, sizeof(domain));
1552 if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
1553 NI_NAMEREQD) == 0) {
1554 if ((cp = strchr(line, '.')) &&
1555 !strcmp(cp + 1, domain))
1563 if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
1564 NI_NUMERICHOST) != 0)
1565 strlcpy(line, "invalid", sizeof(line));
1570 * CRC32C routine for the Stream Control Transmission Protocol
1573 #define CRC32C(c, d) (c = (c>>8) ^ crc_c[(c^(d))&0xFF])
1575 static u_int32_t crc_c[256] = {
1576 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4,
1577 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
1578 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B,
1579 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
1580 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B,
1581 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
1582 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54,
1583 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
1584 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A,
1585 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
1586 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5,
1587 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
1588 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45,
1589 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
1590 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A,
1591 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
1592 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48,
1593 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
1594 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687,
1595 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
1596 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927,
1597 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
1598 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8,
1599 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
1600 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096,
1601 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
1602 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859,
1603 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
1604 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9,
1605 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
1606 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36,
1607 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
1608 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C,
1609 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
1610 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043,
1611 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
1612 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3,
1613 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
1614 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C,
1615 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
1616 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652,
1617 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
1618 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D,
1619 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
1620 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D,
1621 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
1622 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2,
1623 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
1624 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530,
1625 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
1626 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF,
1627 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
1628 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F,
1629 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
1630 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90,
1631 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
1632 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE,
1633 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
1634 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321,
1635 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
1636 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81,
1637 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
1638 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E,
1639 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351
1643 sctp_crc32c(void *packet, u_int32_t len)
1645 u_int32_t i, crc32c;
1646 u_int8_t byte0, byte1, byte2, byte3;
1647 u_int8_t *buf = (u_int8_t *)packet;
1650 for (i = 0; i < len; i++)
1651 CRC32C(crc32c, buf[i]);
1653 byte0 = crc32c & 0xff;
1654 byte1 = (crc32c>>8) & 0xff;
1655 byte2 = (crc32c>>16) & 0xff;
1656 byte3 = (crc32c>>24) & 0xff;
1657 crc32c = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3);
1658 return htonl(crc32c);
1662 in_cksum(u_int16_t *addr, int len)
1665 u_int16_t *w = addr;
1670 * Our algorithm is simple, using a 32 bit accumulator (sum),
1671 * we add sequential 16 bit words to it, and at the end, fold
1672 * back all the carry bits from the top 16 bits into the lower
1680 /* mop up an odd byte, if necessary */
1682 sum += *(u_char *)w;
1685 * add back carry outs from top 16 bits to low 16 bits
1687 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
1688 sum += (sum >> 16); /* add carry */
1689 answer = ~sum; /* truncate to 16 bits */
1694 tcp_chksum(struct sockaddr_in6 *src, struct sockaddr_in6 *dst,
1695 void *payload, u_int32_t len)
1698 struct in6_addr src;
1699 struct in6_addr dst;
1706 pseudo_hdr.src = src->sin6_addr;
1707 pseudo_hdr.dst = dst->sin6_addr;
1708 pseudo_hdr.len = htonl(len);
1709 pseudo_hdr.zero[0] = 0;
1710 pseudo_hdr.zero[1] = 0;
1711 pseudo_hdr.zero[2] = 0;
1712 pseudo_hdr.next = IPPROTO_TCP;
1714 sum[1] = in_cksum((u_int16_t *)&pseudo_hdr, sizeof(pseudo_hdr));
1715 sum[0] = in_cksum(payload, len);
1717 return (~in_cksum(sum, sizeof(sum)));
1725 "usage: traceroute6 [-adIlnNrSTUv] [-A as_server] [-f firsthop] [-g gateway]\n"
1726 " [-m hoplimit] [-p port] [-q probes] [-s src] [-w waittime] target\n"