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 static u_char packet[512]; /* last inbound (icmp) packet */
298 static char *outpacket; /* last output packet */
300 int main(int, char *[]);
301 int wait_for_reply(int, struct msghdr *);
302 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
303 int setpolicy(int so, char *policy);
305 void send_probe(int, u_long);
306 void *get_uphdr(struct ip6_hdr *, u_char *);
307 int get_hoplim(struct msghdr *);
308 double deltaT(struct timeval *, struct timeval *);
309 const char *pr_type(int);
310 int packet_ok(struct msghdr *, int, int, u_char *, u_char *);
311 void print(struct msghdr *, int);
312 const char *inetname(struct sockaddr *);
313 u_int32_t sctp_crc32c(void *, u_int32_t);
314 u_int16_t in_cksum(u_int16_t *addr, int);
315 u_int16_t tcp_chksum(struct sockaddr_in6 *, struct sockaddr_in6 *,
319 static int rcvsock; /* receive (icmp) socket file descriptor */
320 static int sndsock; /* send (raw/udp) socket file descriptor */
322 static struct msghdr rcvmhdr;
323 static struct iovec rcviov[2];
325 static struct in6_pktinfo *rcvpktinfo;
327 static struct sockaddr_in6 Src, Dst, Rcv;
328 static u_long datalen = 20; /* How much data */
329 #define ICMP6ECHOLEN 8
330 /* XXX: 2064 = 127(max hops in type 0 rthdr) * sizeof(ip6_hdr) + 16(margin) */
331 static char rtbuf[2064];
332 static struct ip6_rthdr *rth;
333 static struct cmsghdr *cmsg;
335 static char *source = NULL;
336 static char *hostname;
338 static u_long nprobes = 3;
339 static u_long first_hop = 1;
340 static u_long max_hops = 30;
341 static u_int16_t srcport;
342 static u_int16_t port = 32768+666; /* start udp dest port # for probe packets */
343 static u_int16_t ident;
344 static int tclass = -1;
345 static int options; /* socket options */
347 static int waittime = 5; /* time to wait for response (in seconds) */
348 static int nflag; /* print addresses numerically */
349 static int useproto = IPPROTO_UDP; /* protocol to use to send packet */
350 static int lflag; /* print both numerical address & hostname */
351 static int as_path; /* print as numbers for each hop */
352 static char *as_server = NULL;
356 main(int argc, char *argv[])
358 int mib[4] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_DEFHLIM };
359 char hbuf[NI_MAXHOST], src0[NI_MAXHOST], *ep;
360 int ch, i, on = 1, seq, rcvcmsglen, error;
361 struct addrinfo hints, *res;
362 static u_char *rcvcmsgbuf;
363 u_long probe, hops, lport, ltclass;
368 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
369 char ipsec_inpolicy[] = "in bypass";
370 char ipsec_outpolicy[] = "out bypass";
376 if ((rcvsock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) {
377 perror("socket(ICMPv6)");
382 (void) sysctl(mib, sizeof(mib)/sizeof(mib[0]), &i, &size, NULL, 0);
385 /* specify to tell receiving interface */
386 #ifdef IPV6_RECVPKTINFO
387 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on,
389 err(1, "setsockopt(IPV6_RECVPKTINFO)");
390 #else /* old adv. API */
391 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_PKTINFO, &on,
393 err(1, "setsockopt(IPV6_PKTINFO)");
396 /* specify to tell value of hoplimit field of received IP6 hdr */
397 #ifdef IPV6_RECVHOPLIMIT
398 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on,
400 err(1, "setsockopt(IPV6_RECVHOPLIMIT)");
401 #else /* old adv. API */
402 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_HOPLIMIT, &on,
404 err(1, "setsockopt(IPV6_HOPLIMIT)");
408 ident = htons(getpid() & 0xffff); /* same as ping6 */
410 while ((ch = getopt(argc, argv, "aA:df:g:Ilm:nNp:q:rs:St:TUvw:")) != -1)
425 first_hop = strtoul(optarg, &ep, 0);
426 if (errno || !*optarg || *ep || first_hop > 255) {
428 "traceroute6: invalid min hoplimit.\n");
433 hp = getipnodebyname(optarg, AF_INET6, 0, &h_errno);
436 "traceroute6: unknown host %s\n", optarg);
441 * XXX: We can't detect the number of
442 * intermediate nodes yet.
444 if ((rth = inet6_rth_init((void *)rtbuf,
445 sizeof(rtbuf), IPV6_RTHDR_TYPE_0,
448 "inet6_rth_init failed.\n");
452 if (inet6_rth_add((void *)rth,
453 (struct in6_addr *)hp->h_addr)) {
455 "inet6_rth_add failed for %s\n",
462 useproto = IPPROTO_ICMPV6;
470 max_hops = strtoul(optarg, &ep, 0);
471 if (errno || !*optarg || *ep || max_hops > 255) {
473 "traceroute6: invalid max hoplimit.\n");
481 useproto = IPPROTO_NONE;
486 lport = strtoul(optarg, &ep, 0);
487 if (errno || !*optarg || *ep) {
488 fprintf(stderr, "traceroute6: invalid port.\n");
491 if (lport == 0 || lport != (lport & 0xffff)) {
493 "traceroute6: port out of range.\n");
496 port = lport & 0xffff;
501 nprobes = strtoul(optarg, &ep, 0);
502 if (errno || !*optarg || *ep) {
504 "traceroute6: invalid nprobes.\n");
509 "traceroute6: nprobes must be >0.\n");
514 options |= SO_DONTROUTE;
518 * set the ip source address of the outbound
519 * probe (e.g., on a multi-homed host).
524 useproto = IPPROTO_SCTP;
529 ltclass = strtoul(optarg, &ep, 0);
530 if (errno || !*optarg || *ep || ltclass > 255) {
532 "traceroute6: invalid traffic class.\n");
535 tclass = (int)ltclass;
538 useproto = IPPROTO_TCP;
541 useproto = IPPROTO_UDP;
549 waittime = strtoul(optarg, &ep, 0);
550 if (errno || !*optarg || *ep) {
552 "traceroute6: invalid wait time.\n");
557 "traceroute6: wait must be >= 1 sec.\n");
568 * Open socket to send probe packets.
575 if ((sndsock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
576 perror("socket(SOCK_DGRAM)");
583 if ((sndsock = socket(AF_INET6, SOCK_RAW, useproto)) < 0) {
584 perror("socket(SOCK_RAW)");
589 fprintf(stderr, "traceroute6: unknown probe protocol %d\n",
593 if (max_hops < first_hop) {
595 "traceroute6: max hoplimit must be larger than first hoplimit.\n");
601 if (setresuid(uid, uid, uid) == -1) {
607 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_TCLASS, &tclass,
608 sizeof(int)) == -1) {
609 perror("setsockopt(IPV6_TCLASS)");
614 if (argc < 1 || argc > 2)
618 setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
623 memset(&hints, 0, sizeof(hints));
624 hints.ai_family = PF_INET6;
625 hints.ai_socktype = SOCK_RAW;
626 hints.ai_protocol = IPPROTO_ICMPV6;
627 hints.ai_flags = AI_CANONNAME;
628 error = getaddrinfo(*argv, NULL, &hints, &res);
631 "traceroute6: %s\n", gai_strerror(error));
634 if (res->ai_addrlen != sizeof(Dst)) {
636 "traceroute6: size of sockaddr mismatch\n");
639 memcpy(&Dst, res->ai_addr, res->ai_addrlen);
640 hostname = res->ai_canonname ? strdup(res->ai_canonname) : *argv;
642 fprintf(stderr, "traceroute6: not enough core\n");
646 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf,
647 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
648 strlcpy(hbuf, "?", sizeof(hbuf));
649 fprintf(stderr, "traceroute6: Warning: %s has multiple "
650 "addresses; using %s\n", hostname, hbuf);
656 datalen = strtoul(*argv, &ep, 0);
659 "traceroute6: invalid packet length.\n");
665 minlen = ICMP6ECHOLEN;
668 minlen = sizeof(struct udphdr);
675 minlen = sizeof(struct sctphdr);
678 minlen = sizeof(struct tcphdr);
681 fprintf(stderr, "traceroute6: unknown probe protocol %d.\n",
685 if (datalen < minlen)
687 else if (datalen >= MAXPACKET) {
689 "traceroute6: packet size must be %zu <= s < %d.\n",
693 if (useproto == IPPROTO_UDP)
694 datalen -= sizeof(struct udphdr);
695 if ((useproto == IPPROTO_SCTP) && (datalen & 3)) {
697 "traceroute6: packet size must be a multiple of 4.\n");
700 outpacket = malloc(datalen);
705 (void) bzero((char *)outpacket, datalen);
707 /* initialize msghdr for receiving packets */
708 rcviov[0].iov_base = (caddr_t)packet;
709 rcviov[0].iov_len = sizeof(packet);
710 rcvmhdr.msg_name = (caddr_t)&Rcv;
711 rcvmhdr.msg_namelen = sizeof(Rcv);
712 rcvmhdr.msg_iov = rcviov;
713 rcvmhdr.msg_iovlen = 1;
714 rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
715 CMSG_SPACE(sizeof(int));
716 if ((rcvcmsgbuf = malloc(rcvcmsglen)) == NULL) {
717 fprintf(stderr, "traceroute6: malloc failed\n");
720 rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf;
721 rcvmhdr.msg_controllen = rcvcmsglen;
723 if (options & SO_DEBUG)
724 (void) setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG,
725 (char *)&on, sizeof(on));
726 if (options & SO_DONTROUTE)
727 (void) setsockopt(rcvsock, SOL_SOCKET, SO_DONTROUTE,
728 (char *)&on, sizeof(on));
729 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
731 * do not raise error even if setsockopt fails, kernel may have ipsec
734 if (setpolicy(rcvsock, ipsec_inpolicy) < 0)
735 errx(1, "%s", ipsec_strerror());
736 if (setpolicy(rcvsock, ipsec_outpolicy) < 0)
737 errx(1, "%s", ipsec_strerror());
740 int level = IPSEC_LEVEL_NONE;
742 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level,
744 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level,
746 #ifdef IP_AUTH_TRANS_LEVEL
747 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level,
750 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level,
753 #ifdef IP_AUTH_NETWORK_LEVEL
754 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level,
758 #endif /* !(IPSEC && IPSEC_POLICY_IPSEC) */
764 if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&i,
766 perror("setsockopt(SO_SNDBUF)");
769 #endif /* SO_SNDBUF */
770 if (options & SO_DEBUG)
771 (void) setsockopt(sndsock, SOL_SOCKET, SO_DEBUG,
772 (char *)&on, sizeof(on));
773 if (options & SO_DONTROUTE)
774 (void) setsockopt(sndsock, SOL_SOCKET, SO_DONTROUTE,
775 (char *)&on, sizeof(on));
776 if (rth) {/* XXX: there is no library to finalize the header... */
777 rth->ip6r_len = rth->ip6r_segleft * 2;
778 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_RTHDR,
779 (void *)rth, (rth->ip6r_len + 1) << 3)) {
780 fprintf(stderr, "setsockopt(IPV6_RTHDR): %s\n",
785 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
787 * do not raise error even if setsockopt fails, kernel may have ipsec
790 if (setpolicy(sndsock, ipsec_inpolicy) < 0)
791 errx(1, "%s", ipsec_strerror());
792 if (setpolicy(sndsock, ipsec_outpolicy) < 0)
793 errx(1, "%s", ipsec_strerror());
796 int level = IPSEC_LEVEL_BYPASS;
798 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level,
800 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level,
802 #ifdef IP_AUTH_TRANS_LEVEL
803 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level,
806 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level,
809 #ifdef IP_AUTH_NETWORK_LEVEL
810 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level,
814 #endif /* !(IPSEC && IPSEC_POLICY_IPSEC) */
819 bzero(&Src, sizeof(Src));
821 memset(&hints, 0, sizeof(hints));
822 hints.ai_family = AF_INET6;
823 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
824 hints.ai_flags = AI_NUMERICHOST;
825 error = getaddrinfo(source, "0", &hints, &res);
827 printf("traceroute6: %s: %s\n", source,
828 gai_strerror(error));
831 if (res->ai_addrlen > sizeof(Src)) {
832 printf("traceroute6: %s: %s\n", source,
833 gai_strerror(error));
836 memcpy(&Src, res->ai_addr, res->ai_addrlen);
839 struct sockaddr_in6 Nxt;
844 Nxt.sin6_port = htons(DUMMY_PORT);
846 bcopy(inet6_rthdr_getaddr(cmsg, 1), &Nxt.sin6_addr,
847 sizeof(Nxt.sin6_addr));
848 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
852 if (connect(dummy, (struct sockaddr *)&Nxt, Nxt.sin6_len) < 0) {
857 if (getsockname(dummy, (struct sockaddr *)&Src, &len) < 0) {
858 perror("getsockname");
861 if (getnameinfo((struct sockaddr *)&Src, Src.sin6_len,
862 src0, sizeof(src0), NULL, 0, NI_NUMERICHOST)) {
863 fprintf(stderr, "getnameinfo failed for source\n");
870 Src.sin6_port = htons(0);
871 if (bind(sndsock, (struct sockaddr *)&Src, Src.sin6_len) < 0) {
880 if (getsockname(sndsock, (struct sockaddr *)&Src, &len) < 0) {
881 perror("getsockname");
884 srcport = ntohs(Src.sin6_port);
888 asn = as_setup(as_server);
891 "traceroute6: as_setup failed, AS# lookups"
893 (void)fflush(stderr);
901 if (getnameinfo((struct sockaddr *)&Dst, Dst.sin6_len, hbuf,
902 sizeof(hbuf), NULL, 0, NI_NUMERICHOST))
903 strlcpy(hbuf, "(invalid)", sizeof(hbuf));
904 fprintf(stderr, "traceroute6");
905 fprintf(stderr, " to %s (%s)", hostname, hbuf);
907 fprintf(stderr, " from %s", source);
908 fprintf(stderr, ", %lu hops max, %lu byte packets\n",
910 datalen + ((useproto == IPPROTO_UDP) ? sizeof(struct udphdr) : 0));
911 (void) fflush(stderr);
914 printf("Skipping %lu intermediate hops\n", first_hop - 1);
919 for (hops = first_hop; hops <= max_hops; ++hops) {
920 struct in6_addr lastaddr;
922 unsigned unreachable = 0;
924 printf("%2lu ", hops);
925 bzero(&lastaddr, sizeof(lastaddr));
926 for (probe = 0; probe < nprobes; ++probe) {
928 struct timeval t1, t2;
930 (void) gettimeofday(&t1, NULL);
931 send_probe(++seq, hops);
932 while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) {
933 (void) gettimeofday(&t2, NULL);
934 if (packet_ok(&rcvmhdr, cc, seq, &type, &code)) {
935 if (!IN6_ARE_ADDR_EQUAL(&Rcv.sin6_addr,
938 fputs("\n ", stdout);
940 lastaddr = Rcv.sin6_addr;
942 printf(" %.3f ms", deltaT(&t1, &t2));
943 if (type == ICMP6_DST_UNREACH) {
945 case ICMP6_DST_UNREACH_NOROUTE:
949 case ICMP6_DST_UNREACH_ADMIN:
953 case ICMP6_DST_UNREACH_NOTNEIGHBOR:
957 case ICMP6_DST_UNREACH_ADDR:
961 case ICMP6_DST_UNREACH_NOPORT:
968 } else if (type == ICMP6_PARAM_PROB &&
969 code == ICMP6_PARAMPROB_NEXTHEADER) {
972 } else if (type == ICMP6_ECHO_REPLY) {
979 } else if (deltaT(&t1, &t2) > waittime * 1000) {
986 (void) fflush(stdout);
990 (unreachable > 0 && unreachable >= ((nprobes + 1) / 2))) {
1001 wait_for_reply(int sock, struct msghdr *mhdr)
1004 struct pollfd pfd[1];
1008 pfd[0].events = POLLIN;
1011 if (poll(pfd, 1, waittime * 1000) > 0)
1012 cc = recvmsg(rcvsock, mhdr, 0);
1017 struct timeval wait;
1020 fdsn = howmany(sock + 1, NFDBITS) * sizeof(fd_mask);
1021 if ((fdsp = (fd_set *)malloc(fdsn)) == NULL)
1023 memset(fdsp, 0, fdsn);
1025 wait.tv_sec = waittime; wait.tv_usec = 0;
1027 if (select(sock+1, fdsp, (fd_set *)0, (fd_set *)0, &wait) > 0)
1028 cc = recvmsg(rcvsock, mhdr, 0);
1035 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
1037 setpolicy(int so, char *policy)
1041 buf = ipsec_set_policy(policy, strlen(policy));
1043 warnx("%s", ipsec_strerror());
1046 (void)setsockopt(so, IPPROTO_IPV6, IPV6_IPSEC_POLICY,
1047 buf, ipsec_get_policylen(buf));
1056 send_probe(int seq, u_long hops)
1058 struct icmp6_hdr *icp;
1059 struct sctphdr *sctp;
1060 struct sctp_chunkhdr *chk;
1061 struct sctp_init_chunk *init;
1062 struct sctp_paramhdr *param;
1067 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
1068 (char *)&i, sizeof(i)) < 0) {
1069 perror("setsockopt IPV6_UNICAST_HOPS");
1072 Dst.sin6_port = htons(port + seq);
1075 case IPPROTO_ICMPV6:
1076 icp = (struct icmp6_hdr *)outpacket;
1078 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1079 icp->icmp6_code = 0;
1080 icp->icmp6_cksum = 0;
1081 icp->icmp6_id = ident;
1082 icp->icmp6_seq = htons(seq);
1087 /* No space for anything. No harm as seq/tv32 are decorative. */
1090 sctp = (struct sctphdr *)outpacket;
1092 sctp->src_port = htons(ident);
1093 sctp->dest_port = htons(port + seq);
1094 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1095 sizeof(struct sctp_init_chunk))) {
1098 sctp->v_tag = (sctp->src_port << 16) | sctp->dest_port;
1100 sctp->checksum = htonl(0);
1101 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1102 sizeof(struct sctp_init_chunk))) {
1104 * Send a packet containing an INIT chunk. This works
1105 * better in case of firewalls on the path, but
1106 * results in a probe packet containing at least
1107 * 32 bytes of payload. For shorter payloads, use
1108 * SHUTDOWN-ACK chunks.
1110 init = (struct sctp_init_chunk *)(sctp + 1);
1111 init->ch.chunk_type = SCTP_INITIATION;
1112 init->ch.chunk_flags = 0;
1113 init->ch.chunk_length = htons((u_int16_t)(datalen -
1114 sizeof(struct sctphdr)));
1115 init->init.initiate_tag = (sctp->src_port << 16) |
1117 init->init.a_rwnd = htonl(1500);
1118 init->init.num_outbound_streams = htons(1);
1119 init->init.num_inbound_streams = htons(1);
1120 init->init.initial_tsn = htonl(0);
1121 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1122 sizeof(struct sctp_init_chunk) +
1123 sizeof(struct sctp_paramhdr))) {
1124 param = (struct sctp_paramhdr *)(init + 1);
1125 param->param_type = htons(SCTP_PAD);
1126 param->param_length =
1127 htons((u_int16_t)(datalen -
1128 sizeof(struct sctphdr) -
1129 sizeof(struct sctp_init_chunk)));
1133 * Send a packet containing a SHUTDOWN-ACK chunk,
1134 * possibly followed by a PAD chunk.
1136 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1137 sizeof(struct sctp_chunkhdr))) {
1138 chk = (struct sctp_chunkhdr *)(sctp + 1);
1139 chk->chunk_type = SCTP_SHUTDOWN_ACK;
1140 chk->chunk_flags = 0;
1141 chk->chunk_length = htons(4);
1143 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1144 2 * sizeof(struct sctp_chunkhdr))) {
1146 chk->chunk_type = SCTP_PAD_CHUNK;
1147 chk->chunk_flags = 0;
1148 chk->chunk_length = htons((u_int16_t)(datalen -
1149 sizeof(struct sctphdr) -
1150 sizeof(struct sctp_chunkhdr)));
1153 sctp->checksum = sctp_crc32c(outpacket, datalen);
1156 tcp = (struct tcphdr *)outpacket;
1158 tcp->th_sport = htons(ident);
1159 tcp->th_dport = htons(port + seq);
1160 tcp->th_seq = (tcp->th_sport << 16) | tcp->th_dport;
1163 tcp->th_flags = TH_SYN;
1165 tcp->th_sum = tcp_chksum(&Src, &Dst, outpacket, datalen);
1168 fprintf(stderr, "Unknown probe protocol %d.\n", useproto);
1172 i = sendto(sndsock, (char *)outpacket, datalen, 0,
1173 (struct sockaddr *)&Dst, Dst.sin6_len);
1174 if (i < 0 || (u_long)i != datalen) {
1177 printf("traceroute6: wrote %s %lu chars, ret=%d\n",
1178 hostname, datalen, i);
1179 (void) fflush(stdout);
1184 get_hoplim(struct msghdr *mhdr)
1188 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1189 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1190 if (cm->cmsg_level == IPPROTO_IPV6 &&
1191 cm->cmsg_type == IPV6_HOPLIMIT &&
1192 cm->cmsg_len == CMSG_LEN(sizeof(int)))
1193 return (*(int *)CMSG_DATA(cm));
1200 deltaT(struct timeval *t1p, struct timeval *t2p)
1204 dt = (double)(t2p->tv_sec - t1p->tv_sec) * 1000.0 +
1205 (double)(t2p->tv_usec - t1p->tv_usec) / 1000.0;
1210 * Convert an ICMP "type" field to a printable string.
1215 u_char t = t0 & 0xff;
1219 case ICMP6_DST_UNREACH:
1220 cp = "Destination Unreachable";
1222 case ICMP6_PACKET_TOO_BIG:
1223 cp = "Packet Too Big";
1225 case ICMP6_TIME_EXCEEDED:
1226 cp = "Time Exceeded";
1228 case ICMP6_PARAM_PROB:
1229 cp = "Parameter Problem";
1231 case ICMP6_ECHO_REQUEST:
1232 cp = "Echo Request";
1234 case ICMP6_ECHO_REPLY:
1237 case ICMP6_MEMBERSHIP_QUERY:
1238 cp = "Group Membership Query";
1240 case ICMP6_MEMBERSHIP_REPORT:
1241 cp = "Group Membership Report";
1243 case ICMP6_MEMBERSHIP_REDUCTION:
1244 cp = "Group Membership Reduction";
1246 case ND_ROUTER_SOLICIT:
1247 cp = "Router Solicitation";
1249 case ND_ROUTER_ADVERT:
1250 cp = "Router Advertisement";
1252 case ND_NEIGHBOR_SOLICIT:
1253 cp = "Neighbor Solicitation";
1255 case ND_NEIGHBOR_ADVERT:
1256 cp = "Neighbor Advertisement";
1269 packet_ok(struct msghdr *mhdr, int cc, int seq, u_char *type, u_char *code)
1271 struct icmp6_hdr *icp;
1272 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 &&
1340 *code == ICMP6_TIME_EXCEED_TRANSIT) ||
1341 (*type == ICMP6_DST_UNREACH) ||
1342 (*type == ICMP6_PARAM_PROB &&
1343 *code == ICMP6_PARAMPROB_NEXTHEADER)) {
1344 struct ip6_hdr *hip;
1345 struct icmp6_hdr *icmp;
1346 struct sctp_init_chunk *init;
1347 struct sctphdr *sctp;
1352 hip = (struct ip6_hdr *)(icp + 1);
1353 if ((up = get_uphdr(hip, (u_char *)(buf + cc))) == NULL) {
1355 warnx("failed to get upper layer header");
1359 case IPPROTO_ICMPV6:
1360 icmp = (struct icmp6_hdr *)up;
1361 if (icmp->icmp6_id == ident &&
1362 icmp->icmp6_seq == htons(seq))
1366 udp = (struct udphdr *)up;
1367 if (udp->uh_sport == htons(srcport) &&
1368 udp->uh_dport == htons(port + seq))
1372 sctp = (struct sctphdr *)up;
1373 if (sctp->src_port != htons(ident) ||
1374 sctp->dest_port != htons(port + seq)) {
1377 if (datalen >= (u_long)(sizeof(struct sctphdr) +
1378 sizeof(struct sctp_init_chunk))) {
1379 if (sctp->v_tag != 0) {
1382 init = (struct sctp_init_chunk *)(sctp + 1);
1383 /* Check the initiate tag, if available. */
1384 if ((char *)&init->init.a_rwnd > buf + cc) {
1387 if (init->init.initiate_tag == (u_int32_t)
1388 ((sctp->src_port << 16) | sctp->dest_port)) {
1393 (u_int32_t)((sctp->src_port << 16) |
1400 tcp = (struct tcphdr *)up;
1401 if (tcp->th_sport == htons(ident) &&
1402 tcp->th_dport == htons(port + seq) &&
1404 (tcp_seq)((tcp->th_sport << 16) | tcp->th_dport))
1410 fprintf(stderr, "Unknown probe proto %d.\n", useproto);
1413 } else if (useproto == IPPROTO_ICMPV6 && *type == ICMP6_ECHO_REPLY) {
1414 if (icp->icmp6_id == ident &&
1415 icp->icmp6_seq == htons(seq))
1419 char sbuf[NI_MAXHOST+1], dbuf[INET6_ADDRSTRLEN];
1423 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1424 sbuf, sizeof(sbuf), NULL, 0, NI_NUMERICHOST) != 0)
1425 strlcpy(sbuf, "invalid", sizeof(sbuf));
1426 printf("\n%d bytes from %s to %s", cc, sbuf,
1427 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1428 dbuf, sizeof(dbuf)) : "?");
1429 printf(": icmp type %d (%s) code %d\n", *type, pr_type(*type),
1431 p = (u_int8_t *)(icp + 1);
1433 for (i = 0; i < cc; i++) {
1438 printf("%02x", p[i]);
1439 if (i % WIDTH == WIDTH - 1)
1442 if (cc % WIDTH != 0)
1449 * Increment pointer until find the UDP or ICMP header.
1452 get_uphdr(struct ip6_hdr *ip6, u_char *lim)
1454 u_char *cp = (u_char *)ip6, nh;
1456 static u_char none_hdr[1]; /* Fake pointer for IPPROTO_NONE. */
1458 if (cp + sizeof(*ip6) > lim)
1462 cp += sizeof(struct ip6_hdr);
1464 while (lim - cp >= (nh == IPPROTO_NONE ? 0 : 8)) {
1468 case IPPROTO_ICMPV6:
1469 return (useproto == nh ? cp : NULL);
1473 return (useproto == nh ? cp : NULL);
1475 return (useproto == nh ? none_hdr : NULL);
1476 case IPPROTO_FRAGMENT:
1477 hlen = sizeof(struct ip6_frag);
1478 nh = ((struct ip6_frag *)cp)->ip6f_nxt;
1481 hlen = (((struct ip6_ext *)cp)->ip6e_len + 2) << 2;
1482 nh = ((struct ip6_ext *)cp)->ip6e_nxt;
1485 hlen = (((struct ip6_ext *)cp)->ip6e_len + 1) << 3;
1486 nh = ((struct ip6_ext *)cp)->ip6e_nxt;
1497 print(struct msghdr *mhdr, int cc)
1499 struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name;
1500 char hbuf[NI_MAXHOST];
1502 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1503 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
1504 strlcpy(hbuf, "invalid", sizeof(hbuf));
1506 printf(" [AS%u]", as_lookup(asn, hbuf, AF_INET6));
1508 printf(" %s", hbuf);
1510 printf(" %s (%s)", inetname((struct sockaddr *)from), hbuf);
1512 printf(" %s", inetname((struct sockaddr *)from));
1516 printf(" %d bytes to %s", cc,
1517 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1518 hbuf, sizeof(hbuf)) : "?");
1520 printf(" %d bytes of data to %s", cc,
1521 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1522 hbuf, sizeof(hbuf)) : "?");
1528 * Construct an Internet address representation.
1529 * If the nflag has been supplied, give
1530 * numeric value, otherwise try for symbolic name.
1533 inetname(struct sockaddr *sa)
1535 static char line[NI_MAXHOST], domain[MAXHOSTNAMELEN + 1];
1536 static int first = 1;
1539 if (first && !nflag) {
1541 if (gethostname(domain, sizeof(domain)) == 0 &&
1542 (cp = strchr(domain, '.')))
1543 (void) strlcpy(domain, cp + 1, sizeof(domain));
1549 if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
1550 NI_NAMEREQD) == 0) {
1551 if ((cp = strchr(line, '.')) &&
1552 !strcmp(cp + 1, domain))
1560 if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
1561 NI_NUMERICHOST) != 0)
1562 strlcpy(line, "invalid", sizeof(line));
1567 * CRC32C routine for the Stream Control Transmission Protocol
1570 #define CRC32C(c, d) (c = (c>>8) ^ crc_c[(c^(d))&0xFF])
1572 static u_int32_t crc_c[256] = {
1573 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4,
1574 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
1575 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B,
1576 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
1577 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B,
1578 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
1579 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54,
1580 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
1581 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A,
1582 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
1583 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5,
1584 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
1585 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45,
1586 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
1587 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A,
1588 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
1589 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48,
1590 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
1591 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687,
1592 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
1593 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927,
1594 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
1595 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8,
1596 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
1597 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096,
1598 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
1599 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859,
1600 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
1601 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9,
1602 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
1603 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36,
1604 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
1605 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C,
1606 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
1607 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043,
1608 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
1609 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3,
1610 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
1611 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C,
1612 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
1613 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652,
1614 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
1615 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D,
1616 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
1617 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D,
1618 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
1619 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2,
1620 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
1621 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530,
1622 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
1623 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF,
1624 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
1625 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F,
1626 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
1627 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90,
1628 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
1629 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE,
1630 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
1631 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321,
1632 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
1633 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81,
1634 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
1635 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E,
1636 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351
1640 sctp_crc32c(void *pack, u_int32_t len)
1642 u_int32_t i, crc32c;
1643 u_int8_t byte0, byte1, byte2, byte3;
1644 u_int8_t *buf = (u_int8_t *)pack;
1647 for (i = 0; i < len; i++)
1648 CRC32C(crc32c, buf[i]);
1650 byte0 = crc32c & 0xff;
1651 byte1 = (crc32c>>8) & 0xff;
1652 byte2 = (crc32c>>16) & 0xff;
1653 byte3 = (crc32c>>24) & 0xff;
1654 crc32c = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3);
1655 return htonl(crc32c);
1659 in_cksum(u_int16_t *addr, int len)
1662 u_int16_t *w = addr;
1667 * Our algorithm is simple, using a 32 bit accumulator (sum),
1668 * we add sequential 16 bit words to it, and at the end, fold
1669 * back all the carry bits from the top 16 bits into the lower
1677 /* mop up an odd byte, if necessary */
1679 sum += *(u_char *)w;
1682 * add back carry outs from top 16 bits to low 16 bits
1684 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
1685 sum += (sum >> 16); /* add carry */
1686 answer = ~sum; /* truncate to 16 bits */
1691 tcp_chksum(struct sockaddr_in6 *src, struct sockaddr_in6 *dst,
1692 void *payload, u_int32_t len)
1695 struct in6_addr src;
1696 struct in6_addr dst;
1703 pseudo_hdr.src = src->sin6_addr;
1704 pseudo_hdr.dst = dst->sin6_addr;
1705 pseudo_hdr.len = htonl(len);
1706 pseudo_hdr.zero[0] = 0;
1707 pseudo_hdr.zero[1] = 0;
1708 pseudo_hdr.zero[2] = 0;
1709 pseudo_hdr.next = IPPROTO_TCP;
1711 sum[1] = in_cksum((u_int16_t *)&pseudo_hdr, sizeof(pseudo_hdr));
1712 sum[0] = in_cksum(payload, len);
1714 return (~in_cksum(sum, sizeof(sum)));
1722 "usage: traceroute6 [-adIlnNrSTUv] [-A as_server] [-f firsthop] [-g gateway]\n"
1723 " [-m hoplimit] [-p port] [-q probes] [-s src] [-w waittime] target\n"