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Drop main() prototype. Syncs with NetBSD-8
[minix.git] / usr.sbin / traceroute6 / traceroute6.c
blobf9c9f06558c64e657bdbeab5066195fd0d11cb95
1 /* $NetBSD: traceroute6.c,v 1.43 2012/12/10 18:11:33 christos Exp $ */
2 /* $KAME: traceroute6.c,v 1.67 2004/01/25 03:24:39 itojun Exp $ */
3
4 /*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*-
34 * Copyright (c) 1990, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * This code is derived from software contributed to Berkeley by
38 * Van Jacobson.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 */
64
65 #if 0
66 #ifndef lint
67 static char copyright[] =
68 "@(#) Copyright (c) 1990, 1993\n\
69 The Regents of the University of California. All rights reserved.\n";
70 #endif /* not lint */
71
72 #ifndef lint
73 static char sccsid[] = "@(#)traceroute.c 8.1 (Berkeley) 6/6/93";
74 #endif /* not lint */
75 #else
76 #include <sys/cdefs.h>
77 #ifndef lint
78 __RCSID("$NetBSD: traceroute6.c,v 1.43 2012/12/10 18:11:33 christos Exp $");
79 #endif
80 #endif
81
82 /*
83 * traceroute host - trace the route ip packets follow going to "host".
84 *
85 * Attempt to trace the route an ip packet would follow to some
86 * internet host. We find out intermediate hops by launching probe
87 * packets with a small ttl (time to live) then listening for an
88 * icmp "time exceeded" reply from a gateway. We start our probes
89 * with a ttl of one and increase by one until we get an icmp "port
90 * unreachable" (which means we got to "host") or hit a max (which
91 * defaults to 30 hops & can be changed with the -m flag). Three
92 * probes (change with -q flag) are sent at each ttl setting and a
93 * line is printed showing the ttl, address of the gateway and
94 * round trip time of each probe. If the probe answers come from
95 * different gateways, the address of each responding system will
96 * be printed. If there is no response within a 5 sec. timeout
97 * interval (changed with the -w flag), a "*" is printed for that
98 * probe.
99 *
100 * Probe packets are UDP format. We don't want the destination
101 * host to process them so the destination port is set to an
102 * unlikely value (if some clod on the destination is using that
103 * value, it can be changed with the -p flag).
104 *
105 * A sample use might be:
106 *
107 * [yak 71]% traceroute nis.nsf.net.
108 * traceroute to nis.nsf.net (35.1.1.48), 30 hops max, 56 byte packet
109 * 1 helios.ee.lbl.gov (128.3.112.1) 19 ms 19 ms 0 ms
110 * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms
111 * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms
112 * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 39 ms
113 * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 39 ms 39 ms 39 ms
114 * 6 128.32.197.4 (128.32.197.4) 40 ms 59 ms 59 ms
115 * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 59 ms
116 * 8 129.140.70.13 (129.140.70.13) 99 ms 99 ms 80 ms
117 * 9 129.140.71.6 (129.140.71.6) 139 ms 239 ms 319 ms
118 * 10 129.140.81.7 (129.140.81.7) 220 ms 199 ms 199 ms
119 * 11 nic.merit.edu (35.1.1.48) 239 ms 239 ms 239 ms
120 *
121 * Note that lines 2 & 3 are the same. This is due to a buggy
122 * kernel on the 2nd hop system -- lbl-csam.arpa -- that forwards
123 * packets with a zero ttl.
124 *
125 * A more interesting example is:
126 *
127 * [yak 72]% traceroute allspice.lcs.mit.edu.
128 * traceroute to allspice.lcs.mit.edu (18.26.0.115), 30 hops max
129 * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms
130 * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 19 ms 19 ms
131 * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 19 ms
132 * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 19 ms 39 ms 39 ms
133 * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 20 ms 39 ms 39 ms
134 * 6 128.32.197.4 (128.32.197.4) 59 ms 119 ms 39 ms
135 * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 39 ms
136 * 8 129.140.70.13 (129.140.70.13) 80 ms 79 ms 99 ms
137 * 9 129.140.71.6 (129.140.71.6) 139 ms 139 ms 159 ms
138 * 10 129.140.81.7 (129.140.81.7) 199 ms 180 ms 300 ms
139 * 11 129.140.72.17 (129.140.72.17) 300 ms 239 ms 239 ms
140 * 12 * * *
141 * 13 128.121.54.72 (128.121.54.72) 259 ms 499 ms 279 ms
142 * 14 * * *
143 * 15 * * *
144 * 16 * * *
145 * 17 * * *
146 * 18 ALLSPICE.LCS.MIT.EDU (18.26.0.115) 339 ms 279 ms 279 ms
147 *
148 * (I start to see why I'm having so much trouble with mail to
149 * MIT.) Note that the gateways 12, 14, 15, 16 & 17 hops away
150 * either don't send ICMP "time exceeded" messages or send them
151 * with a ttl too small to reach us. 14 - 17 are running the
152 * MIT C Gateway code that doesn't send "time exceeded"s. God
153 * only knows what's going on with 12.
154 *
155 * The silent gateway 12 in the above may be the result of a bug in
156 * the 4.[23]BSD network code (and its derivatives): 4.x (x <= 3)
157 * sends an unreachable message using whatever ttl remains in the
158 * original datagram. Since, for gateways, the remaining ttl is
159 * zero, the icmp "time exceeded" is guaranteed to not make it back
160 * to us. The behavior of this bug is slightly more interesting
161 * when it appears on the destination system:
162 *
163 * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms
164 * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 39 ms
165 * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 39 ms 19 ms
166 * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 19 ms
167 * 5 ccn-nerif35.Berkeley.EDU (128.32.168.35) 39 ms 39 ms 39 ms
168 * 6 csgw.Berkeley.EDU (128.32.133.254) 39 ms 59 ms 39 ms
169 * 7 * * *
170 * 8 * * *
171 * 9 * * *
172 * 10 * * *
173 * 11 * * *
174 * 12 * * *
175 * 13 rip.Berkeley.EDU (128.32.131.22) 59 ms ! 39 ms ! 39 ms !
176 *
177 * Notice that there are 12 "gateways" (13 is the final
178 * destination) and exactly the last half of them are "missing".
179 * What's really happening is that rip (a Sun-3 running Sun OS3.5)
180 * is using the ttl from our arriving datagram as the ttl in its
181 * icmp reply. So, the reply will time out on the return path
182 * (with no notice sent to anyone since icmp's aren't sent for
183 * icmp's) until we probe with a ttl that's at least twice the path
184 * length. I.e., rip is really only 7 hops away. A reply that
185 * returns with a ttl of 1 is a clue this problem exists.
186 * Traceroute prints a "!" after the time if the ttl is <= 1.
187 * Since vendors ship a lot of obsolete (DEC's Ultrix, Sun 3.x) or
188 * non-standard (HPUX) software, expect to see this problem
189 * frequently and/or take care picking the target host of your
190 * probes.
191 *
192 * Other possible annotations after the time are !H, !N, !P (got a host,
193 * network or protocol unreachable, respectively), !S or !F (source
194 * route failed or fragmentation needed -- neither of these should
195 * ever occur and the associated gateway is busted if you see one). If
196 * almost all the probes result in some kind of unreachable, traceroute
197 * will give up and exit.
198 *
199 * Notes
200 * -----
201 * This program must be run by root or be setuid. (I suggest that
202 * you *don't* make it setuid -- casual use could result in a lot
203 * of unnecessary traffic on our poor, congested nets.)
204 *
205 * This program requires a kernel mod that does not appear in any
206 * system available from Berkeley: A raw ip socket using proto
207 * IPPROTO_RAW must interpret the data sent as an ip datagram (as
208 * opposed to data to be wrapped in a ip datagram). See the README
209 * file that came with the source to this program for a description
210 * of the mods I made to /sys/netinet/raw_ip.c. Your mileage may
211 * vary. But, again, ANY 4.x (x < 4) BSD KERNEL WILL HAVE TO BE
212 * MODIFIED TO RUN THIS PROGRAM.
213 *
214 * The udp port usage may appear bizarre (well, ok, it is bizarre).
215 * The problem is that an icmp message only contains 8 bytes of
216 * data from the original datagram. 8 bytes is the size of a udp
217 * header so, if we want to associate replies with the original
218 * datagram, the necessary information must be encoded into the
219 * udp header (the ip id could be used but there's no way to
220 * interlock with the kernel's assignment of ip id's and, anyway,
221 * it would have taken a lot more kernel hacking to allow this
222 * code to set the ip id). So, to allow two or more users to
223 * use traceroute simultaneously, we use this task's pid as the
224 * source port (the high bit is set to move the port number out
225 * of the "likely" range). To keep track of which probe is being
226 * replied to (so times and/or hop counts don't get confused by a
227 * reply that was delayed in transit), we increment the destination
228 * port number before each probe.
229 *
230 * Don't use this as a coding example. I was trying to find a
231 * routing problem and this code sort-of popped out after 48 hours
232 * without sleep. I was amazed it ever compiled, much less ran.
233 *
234 * I stole the idea for this program from Steve Deering. Since
235 * the first release, I've learned that had I attended the right
236 * IETF working group meetings, I also could have stolen it from Guy
237 * Almes or Matt Mathis. I don't know (or care) who came up with
238 * the idea first. I envy the originators' perspicacity and I'm
239 * glad they didn't keep the idea a secret.
240 *
241 * Tim Seaver, Ken Adelman and C. Philip Wood provided bug fixes and/or
242 * enhancements to the original distribution.
243 *
244 * I've hacked up a round-trip-route version of this that works by
245 * sending a loose-source-routed udp datagram through the destination
246 * back to yourself. Unfortunately, SO many gateways botch source
247 * routing, the thing is almost worthless. Maybe one day...
248 *
249 * -- Van Jacobson (van@helios.ee.lbl.gov)
250 * Tue Dec 20 03:50:13 PST 1988
251 */
252
253 #include <sys/param.h>
254 #include <sys/time.h>
255 #include <sys/socket.h>
256 #include <sys/uio.h>
257 #include <sys/file.h>
258 #include <sys/ioctl.h>
259 #include <sys/sysctl.h>
260
261 #include <netinet/in.h>
262
263 #include <arpa/inet.h>
264
265 #include <netdb.h>
266 #include <stdio.h>
267 #include <err.h>
268 #ifdef HAVE_POLL
269 #include <poll.h>
270 #endif
271 #include <errno.h>
272 #include <stdlib.h>
273 #include <string.h>
274 #include <unistd.h>
275
276 #include <netinet/ip6.h>
277 #include <netinet/icmp6.h>
278 #include <netinet/udp.h>
279
280 #ifdef IPSEC
281 #include <net/route.h>
282 #include <netipsec/ipsec.h>
283 #endif
284
285 #include "as.h"
286
287 #define DUMMY_PORT 10010
288
289 #define MAXPACKET 65535 /* max ip packet size */
290
291 #ifndef HAVE_GETIPNODEBYNAME
292 #define getipnodebyname(x, y, z, u) gethostbyname2((x), (y))
293 #define freehostent(x)
294 #endif
295
296 /*
297 * format of a (udp) probe packet.
298 */
299 struct tv32 {
300 u_int32_t tv32_sec;
301 u_int32_t tv32_usec;
302 };
303
304 struct opacket {
305 u_char seq; /* sequence number of this packet */
306 u_char hops; /* hop limit of the packet */
307 u_char pad[2];
308 struct tv32 tv; /* time packet left */
309 } __packed;
310
311 static u_char packet[512]; /* last inbound (icmp) packet */
312 static struct opacket *outpacket; /* last output (udp) packet */
313
314 static ssize_t wait_for_reply(int, struct msghdr *);
315 #ifdef IPSEC
316 #ifdef IPSEC_POLICY_IPSEC
317 static int setpolicy(int so, const char *policy);
318 #endif
319 #endif
320 static void send_probe(int, u_long);
321 static struct udphdr *get_udphdr(struct ip6_hdr *, u_char *);
322 #if 0
323 static int get_hoplim(struct msghdr *);
324 #endif
325 static double deltaT(struct timeval *, struct timeval *);
326 static const char *pr_type(int);
327 static int packet_ok(struct msghdr *, ssize_t, int);
328 static void print(struct msghdr *, int);
329 static const char *inetname(struct sockaddr *);
330 static void usage(void) __attribute__((__noreturn__));
331
332 static int rcvsock; /* receive (icmp) socket file descriptor */
333 static int sndsock; /* send (udp) socket file descriptor */
334
335 static struct msghdr rcvmhdr;
336 static struct iovec rcviov[2];
337 static int rcvhlim;
338 static struct in6_pktinfo *rcvpktinfo;
339
340 static struct sockaddr_in6 Src, Dst, Rcv;
341 static u_long datalen; /* How much data */
342 #define ICMP6ECHOLEN 8
343 /* XXX: 2064 = 127(max hops in type 0 rthdr) * sizeof(ip6_hdr) + 16(margin) */
344 static char rtbuf[2064];
345 #ifdef USE_RFC3542
346 static struct ip6_rthdr *rth;
347 #endif
348 static struct cmsghdr *cmsg;
349
350 static char *source;
351 static char *hostname;
352
353 static u_long nprobes = 3;
354 static u_long first_hop = 1;
355 static u_long max_hops = 30;
356 static u_int16_t srcport;
357 static u_int16_t port = 32768+666;/* start udp dest port # for probe packets */
358 static u_int16_t ident;
359 static int options; /* socket options */
360 static int verbose;
361 static int waittime = 5; /* time to wait for response (in seconds) */
362 static int nflag; /* print addresses numerically */
363 static int useicmp;
364 static int lflag; /* print both numerical address & hostname */
365 static int as_path; /* print as numbers for each hop */
366 static char *as_server = NULL;
367 static void *asn;
368
369 int
370 main(int argc, char *argv[])
371 {
372 int mib[4] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_DEFHLIM };
373 char hbuf[NI_MAXHOST], src0[NI_MAXHOST], *ep;
374 int ch, i, on = 1, seq, rcvcmsglen, error;
375 u_long minlen;
376 struct addrinfo hints, *res;
377 static u_char *rcvcmsgbuf;
378 u_long probe, hops, lport;
379 struct hostent *hp;
380 size_t size;
381
382 /*
383 * Receive ICMP
384 */
385 if ((rcvsock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0)
386 err(5, "socket(ICMPv6)");
387
388 /* revoke privs */
389 seteuid(getuid());
390 setuid(getuid());
391
392 size = sizeof(i);
393 (void) sysctl(mib, sizeof(mib)/sizeof(mib[0]), &i, &size, NULL, 0);
394 max_hops = i;
395
396 /* specify to tell receiving interface */
397 #ifdef IPV6_RECVPKTINFO
398 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on,
399 sizeof(on)) < 0)
400 err(1, "setsockopt(IPV6_RECVPKTINFO)");
401 #else /* old adv. API */
402 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_PKTINFO, &on,
403 sizeof(on)) < 0)
404 err(1, "setsockopt(IPV6_PKTINFO)");
405 #endif
406
407 /* specify to tell value of hoplimit field of received IP6 hdr */
408 #ifdef IPV6_RECVHOPLIMIT
409 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on,
410 sizeof(on)) < 0)
411 err(1, "setsockopt(IPV6_RECVHOPLIMIT)");
412 #else /* old adv. API */
413 if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_HOPLIMIT, &on,
414 sizeof(on)) < 0)
415 err(1, "setsockopt(IPV6_HOPLIMIT)");
416 #endif
417
418 seq = 0;
419
420 while ((ch = getopt(argc, argv, "aA:df:g:Ilm:np:q:rs:w:v")) != -1)
421 switch (ch) {
422 case 'a':
423 as_path = 1;
424 break;
425 case 'A':
426 as_path = 1;
427 as_server = optarg;
428 break;
429 case 'd':
430 options |= SO_DEBUG;
431 break;
432 case 'f':
433 ep = NULL;
434 errno = 0;
435 first_hop = strtoul(optarg, &ep, 0);
436 if (errno || !*optarg || *ep|| first_hop > 255)
437 errx(1, "Invalid min hoplimit `%s'", optarg);
438 break;
439 case 'g':
440 hp = getipnodebyname(optarg, AF_INET6, 0, &h_errno);
441 if (hp == NULL)
442 errx(1, "Unknown host `%s'", optarg);
443 #ifdef USE_RFC3542
444 if (rth == NULL) {
445 /*
446 * XXX: We can't detect the number of
447 * intermediate nodes yet.
448 */
449 if ((rth = inet6_rth_init((void *)rtbuf,
450 sizeof(rtbuf), IPV6_RTHDR_TYPE_0,
451 0)) == NULL) {
452 errx(1, "inet6_rth_init failed");
453 }
454 }
455 if (inet6_rth_add((void *)rth,
456 (struct in6_addr *)hp->h_addr))
457 errx(1, "inet6_rth_add failed for `%s'",
458 optarg);
459 #else /* old advanced API */
460 if (cmsg == NULL)
461 cmsg = inet6_rthdr_init(rtbuf,
462 IPV6_RTHDR_TYPE_0);
463 inet6_rthdr_add(cmsg, (struct in6_addr *)hp->h_addr,
464 IPV6_RTHDR_LOOSE);
465 #endif
466 freehostent(hp);
467 break;
468 case 'I':
469 useicmp++;
470 /* same as ping6 */
471 ident = htons(arc4random() & 0xffff);
472 break;
473 case 'l':
474 lflag++;
475 break;
476 case 'm':
477 ep = NULL;
478 errno = 0;
479 max_hops = strtoul(optarg, &ep, 0);
480 if (errno || !*optarg || *ep || max_hops > 255)
481 errx(1, "Invalid max hoplimit `%s'", optarg);
482 break;
483 case 'n':
484 nflag++;
485 break;
486 case 'p':
487 ep = NULL;
488 errno = 0;
489 lport = strtoul(optarg, &ep, 0);
490 if (errno || !*optarg || *ep)
491 errx(1, "Invalid port `%s'", optarg);
492 if (lport == 0 || lport != (lport & 0xffff))
493 errx(1, "Port `%s' out of range", optarg);
494 port = lport & 0xffff;
495 break;
496 case 'q':
497 ep = NULL;
498 errno = 0;
499 nprobes = strtoul(optarg, &ep, 0);
500 if (errno || !*optarg || *ep)
501 errx(1, "Invalid nprobes `%s'", optarg);
502 if (nprobes < 1)
503 errx(1, "nprobes `%s' must be > 0", optarg);
504 break;
505 case 'r':
506 options |= SO_DONTROUTE;
507 break;
508 case 's':
509 /*
510 * set the ip source address of the outbound
511 * probe (e.g., on a multi-homed host).
512 */
513 source = optarg;
514 break;
515 case 'v':
516 verbose++;
517 break;
518 case 'w':
519 ep = NULL;
520 errno = 0;
521 waittime = strtoul(optarg, &ep, 0);
522 if (errno || !*optarg || *ep)
523 errx(1, "Invalid wait time `%s'", optarg);
524 if (waittime <= 1)
525 errx(1, "Wait `%s' must be > 1 sec", optarg);
526 break;
527 default:
528 usage();
529 }
530 argc -= optind;
531 argv += optind;
532
533 if (max_hops < first_hop)
534 errx(1, "max hoplimit `%lu' must be larger than "
535 "first hoplimit `%lu'", max_hops, first_hop);
536
537 if (argc < 1 || argc > 2)
538 usage();
539
540 #if 1
541 setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
542 #else
543 setlinebuf(stdout);
544 #endif
545
546 memset(&hints, 0, sizeof(hints));
547 hints.ai_family = PF_INET6;
548 hints.ai_socktype = SOCK_RAW;
549 hints.ai_protocol = IPPROTO_ICMPV6;
550 hints.ai_flags = AI_CANONNAME;
551 error = getaddrinfo(*argv, NULL, &hints, &res);
552 if (error)
553 errx(1, "%s", gai_strerror(error));
554 if (res->ai_addrlen != sizeof(Dst))
555 errx(1, "size of sockaddr mismatch");
556 memcpy(&Dst, res->ai_addr, res->ai_addrlen);
557 hostname = res->ai_canonname ? strdup(res->ai_canonname) : *argv;
558 if (!hostname)
559 err(1, NULL);
560 if (res->ai_next) {
561 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf,
562 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
563 strlcpy(hbuf, "?", sizeof(hbuf));
564 warnx("`%s' has multiple addresses; using `%s'",
565 hostname, hbuf);
566 }
567
568 if (*++argv) {
569 ep = NULL;
570 errno = 0;
571 datalen = strtoul(*argv, &ep, 0);
572 if (errno || !*argv || *ep)
573 errx(1, "Invalid packet length `%s'", *argv);
574 }
575 if (useicmp)
576 minlen = ICMP6ECHOLEN + sizeof(struct tv32);
577 else
578 minlen = sizeof(struct opacket);
579 if (datalen < minlen)
580 datalen = minlen;
581 else if (datalen >= MAXPACKET)
582 errx(1, "Packet size must be %lu <= s < %lu",
583 minlen, (u_long)MAXPACKET);
584 outpacket = (struct opacket *)malloc((unsigned)datalen);
585 if (!outpacket)
586 err(1, NULL);
587 memset(outpacket, 0, datalen);
588
589 /* initialize msghdr for receiving packets */
590 rcviov[0].iov_base = (caddr_t)packet;
591 rcviov[0].iov_len = sizeof(packet);
592 rcvmhdr.msg_name = (caddr_t)&Rcv;
593 rcvmhdr.msg_namelen = sizeof(Rcv);
594 rcvmhdr.msg_iov = rcviov;
595 rcvmhdr.msg_iovlen = 1;
596 rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
597 CMSG_SPACE(sizeof(int));
598 if ((rcvcmsgbuf = malloc(rcvcmsglen)) == NULL)
599 err(1, NULL);
600 rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf;
601 rcvmhdr.msg_controllen = rcvcmsglen;
602
603 if (options & SO_DEBUG)
604 (void) setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG,
605 (char *)&on, sizeof(on));
606 if (options & SO_DONTROUTE)
607 (void) setsockopt(rcvsock, SOL_SOCKET, SO_DONTROUTE,
608 (char *)&on, sizeof(on));
609 #ifdef IPSEC
610 #ifdef IPSEC_POLICY_IPSEC
611 /*
612 * do not raise error even if setsockopt fails, kernel may have ipsec
613 * turned off.
614 */
615 if (setpolicy(rcvsock, "in bypass") < 0)
616 errx(1, "%s", ipsec_strerror());
617 if (setpolicy(rcvsock, "out bypass") < 0)
618 errx(1, "%s", ipsec_strerror());
619 #else
620 {
621 int level = IPSEC_LEVEL_NONE;
622
623 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level,
624 sizeof(level));
625 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level,
626 sizeof(level));
627 #ifdef IP_AUTH_TRANS_LEVEL
628 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level,
629 sizeof(level));
630 #else
631 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level,
632 sizeof(level));
633 #endif
634 #ifdef IP_AUTH_NETWORK_LEVEL
635 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level,
636 sizeof(level));
637 #endif
638 }
639 #endif /*IPSEC_POLICY_IPSEC*/
640 #endif /*IPSEC*/
641
642 /*
643 * Send UDP or ICMP
644 */
645 if (useicmp) {
646 sndsock = rcvsock;
647 } else {
648 if ((sndsock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
649 err(5, "socket(SOCK_DGRAM)");
650 }
651 #ifdef SO_SNDBUF
652 i = datalen;
653 if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&i,
654 sizeof(i)) < 0)
655 err(6, "setsockopt(SO_SNDBUF)");
656 #endif /* SO_SNDBUF */
657 if (options & SO_DEBUG)
658 (void) setsockopt(sndsock, SOL_SOCKET, SO_DEBUG,
659 (char *)&on, sizeof(on));
660 if (options & SO_DONTROUTE)
661 (void) setsockopt(sndsock, SOL_SOCKET, SO_DONTROUTE,
662 (char *)&on, sizeof(on));
663 #ifdef USE_RFC3542
664 if (rth) {/* XXX: there is no library to finalize the header... */
665 rth->ip6r_len = rth->ip6r_segleft * 2;
666 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_RTHDR,
667 (void *)rth, (rth->ip6r_len + 1) << 3))
668 err(1, "setsockopt(IPV6_RTHDR)");
669 }
670 #else /* old advanced API */
671 if (cmsg != NULL) {
672 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE);
673 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_PKTOPTIONS,
674 rtbuf, cmsg->cmsg_len) < 0)
675 err(1, "setsockopt(IPV6_PKTOPTIONS)");
676 }
677 #endif /* USE_RFC3542 */
678 #ifdef IPSEC
679 #ifdef IPSEC_POLICY_IPSEC
680 /*
681 * do not raise error even if setsockopt fails, kernel may have ipsec
682 * turned off.
683 */
684 if (setpolicy(sndsock, "in bypass") < 0)
685 errx(1, "%s", ipsec_strerror());
686 if (setpolicy(sndsock, "out bypass") < 0)
687 errx(1, "%s", ipsec_strerror());
688 #else
689 {
690 int level = IPSEC_LEVEL_BYPASS;
691
692 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level,
693 sizeof(level));
694 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level,
695 sizeof(level));
696 #ifdef IP_AUTH_TRANS_LEVEL
697 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level,
698 sizeof(level));
699 #else
700 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level,
701 sizeof(level));
702 #endif
703 #ifdef IP_AUTH_NETWORK_LEVEL
704 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level,
705 sizeof(level));
706 #endif
707 }
708 #endif /*IPSEC_POLICY_IPSEC*/
709 #endif /*IPSEC*/
710
711 /*
712 * Source selection
713 */
714 memset(&Src, 0, sizeof(Src));
715 if (source) {
716 struct addrinfo hints0, *res0;
717 int error0;
718
719 memset(&hints0, 0, sizeof(hints0));
720 hints0.ai_family = AF_INET6;
721 hints0.ai_socktype = SOCK_DGRAM; /*dummy*/
722 hints0.ai_flags = AI_NUMERICHOST;
723 error0 = getaddrinfo(source, "0", &hints0, &res0);
724 if (error0)
725 errx(1, "Cannot get address for `%s' (%s)", source,
726 gai_strerror(error0));
727 if (res0->ai_addrlen > sizeof(Src))
728 errx(1, "Bad incompatible address length");
729 memcpy(&Src, res0->ai_addr, res0->ai_addrlen);
730 freeaddrinfo(res0);
731 } else {
732 struct sockaddr_in6 Nxt;
733 int dummy;
734 socklen_t len;
735
736 Nxt = Dst;
737 Nxt.sin6_port = htons(DUMMY_PORT);
738 if (cmsg != NULL)
739 memcpy( &Nxt.sin6_addr, inet6_rthdr_getaddr(cmsg, 1),
740 sizeof(Nxt.sin6_addr));
741 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
742 err(1, "socket");
743 if (connect(dummy, (struct sockaddr *)&Nxt, Nxt.sin6_len) < 0)
744 err(1, "connect");
745 len = sizeof(Src);
746 if (getsockname(dummy, (struct sockaddr *)&Src, &len) < 0)
747 err(1, "getsockname");
748 if ((error = getnameinfo((struct sockaddr *)&Src, Src.sin6_len,
749 src0, sizeof(src0), NULL, 0, NI_NUMERICHOST)))
750 errx(1, "getnameinfo failed for source (%s)",
751 gai_strerror(error));
752 source = src0;
753 close(dummy);
754 }
755
756 Src.sin6_port = htons(0);
757 if (bind(sndsock, (struct sockaddr *)&Src, Src.sin6_len) < 0)
758 err(1, "bind");
759
760 {
761 socklen_t len;
762
763 len = sizeof(Src);
764 if (getsockname(sndsock, (struct sockaddr *)&Src, &len) < 0)
765 err(1, "bind");
766 srcport = ntohs(Src.sin6_port);
767 }
768
769 if (as_path) {
770 asn = as_setup(as_server);
771 if (asn == NULL) {
772 warnx("as_setup failed, AS# lookups disabled");
773 (void)fflush(stderr);
774 as_path = 0;
775 }
776 }
777
778 /*
779 * Message to users
780 */
781 if (getnameinfo((struct sockaddr *)&Dst, Dst.sin6_len, hbuf,
782 sizeof(hbuf), NULL, 0, NI_NUMERICHOST))
783 strlcpy(hbuf, "(invalid)", sizeof(hbuf));
784 fprintf(stderr, "traceroute6");
785 fprintf(stderr, " to %s (%s)", hostname, hbuf);
786 if (source)
787 fprintf(stderr, " from %s", source);
788 fprintf(stderr, ", %lu hops max, %lu byte packets\n",
789 max_hops, datalen);
790 (void) fflush(stderr);
791
792 if (first_hop > 1)
793 printf("Skipping %lu intermediate hops\n", first_hop - 1);
794
795 /*
796 * Main loop
797 */
798 for (hops = first_hop; hops <= max_hops; ++hops) {
799 struct in6_addr lastaddr;
800 int got_there = 0;
801 u_long unreachable = 0;
802
803 printf("%2lu ", hops);
804 memset(&lastaddr, 0, sizeof(lastaddr));
805 for (probe = 0; probe < nprobes; ++probe) {
806 int cc;
807 struct timeval t1, t2;
808
809 (void) gettimeofday(&t1, NULL);
810 if (!useicmp && htons((in_port_t)(port + seq + 1)) == 0)
811 seq++;
812 send_probe(++seq, hops);
813 while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) {
814 (void) gettimeofday(&t2, NULL);
815 if ((i = packet_ok(&rcvmhdr, cc, seq))) {
816 if (!IN6_ARE_ADDR_EQUAL(&Rcv.sin6_addr,
817 &lastaddr)) {
818 print(&rcvmhdr, cc);
819 lastaddr = Rcv.sin6_addr;
820 }
821 printf(" %g ms", deltaT(&t1, &t2));
822 switch (i - 1) {
823 case ICMP6_DST_UNREACH_NOROUTE:
824 ++unreachable;
825 printf(" !N");
826 break;
827 case ICMP6_DST_UNREACH_ADMIN:
828 ++unreachable;
829 printf(" !X");
830 break;
831 case ICMP6_DST_UNREACH_NOTNEIGHBOR:
832 ++unreachable;
833 printf(" !S");
834 break;
835 case ICMP6_DST_UNREACH_ADDR:
836 ++unreachable;
837 printf(" !H");
838 break;
839 case ICMP6_DST_UNREACH_NOPORT:
840 if (rcvhlim >= 0 &&
841 rcvhlim <= 1)
842 printf(" !");
843 ++got_there;
844 break;
845 }
846 break;
847 }
848 }
849 if (cc == 0)
850 printf(" *");
851 (void) fflush(stdout);
852 }
853 putchar('\n');
854 if (got_there ||
855 (unreachable > 0 && unreachable >= ((nprobes + 1) / 2))) {
856 exit(0);
857 }
858 }
859
860 if (as_path)
861 as_shutdown(asn);
862
863 exit(0);
864 }
865
866 static ssize_t
867 wait_for_reply(int sock, struct msghdr *mhdr)
868 {
869 #ifdef HAVE_POLL
870 struct pollfd pfd[1];
871 ssize_t cc = 0;
872
873 pfd[0].fd = sock;
874 pfd[0].events = POLLIN;
875 pfd[0].revents = 0;
876
877 if (poll(pfd, 1, waittime * 1000) > 0)
878 cc = recvmsg(rcvsock, mhdr, 0);
879
880 return cc;
881 #else
882 fd_set *fdsp;
883 struct timeval wait;
884 ssize_t cc = 0;
885 int fdsn;
886
887 fdsn = howmany(sock + 1, NFDBITS) * sizeof(fd_mask);
888 if ((fdsp = (fd_set *)malloc(fdsn)) == NULL)
889 err(1, "malloc");
890 memset(fdsp, 0, fdsn);
891 FD_SET(sock, fdsp);
892 wait.tv_sec = waittime; wait.tv_usec = 0;
893
894 if (select(sock+1, fdsp, (fd_set *)0, (fd_set *)0, &wait) > 0)
895 cc = recvmsg(rcvsock, mhdr, 0);
896
897 free(fdsp);
898 return cc;
899 #endif
900 }
901
902 #ifdef IPSEC
903 #ifdef IPSEC_POLICY_IPSEC
904 static int
905 setpolicy(int so, const char *policy)
906 {
907 char *buf;
908
909 buf = ipsec_set_policy(policy, strlen(policy));
910 if (buf == NULL) {
911 warnx("%s", ipsec_strerror());
912 return -1;
913 }
914 (void)setsockopt(so, IPPROTO_IPV6, IPV6_IPSEC_POLICY,
915 buf, ipsec_get_policylen(buf));
916
917 free(buf);
918
919 return 0;
920 }
921 #endif
922 #endif
923
924 static void
925 send_probe(int seq, u_long hops)
926 {
927 struct timeval tv;
928 struct tv32 tv32;
929 int i;
930
931 i = hops;
932 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
933 (char *)&i, sizeof(i)) < 0)
934 warn("setsockopt IPV6_UNICAST_HOPS");
935
936 Dst.sin6_port = htons(port + seq);
937 (void) gettimeofday(&tv, NULL);
938 tv32.tv32_sec = htonl(tv.tv_sec);
939 tv32.tv32_usec = htonl(tv.tv_usec);
940
941 if (useicmp) {
942 struct icmp6_hdr *icp = (struct icmp6_hdr *)outpacket;
943
944 icp->icmp6_type = ICMP6_ECHO_REQUEST;
945 icp->icmp6_code = 0;
946 icp->icmp6_cksum = 0;
947 icp->icmp6_id = ident;
948 icp->icmp6_seq = htons(seq);
949 memcpy(((u_int8_t *)outpacket + ICMP6ECHOLEN), &tv32,
950 sizeof(tv32));
951 } else {
952 struct opacket *op = outpacket;
953
954 op->seq = seq;
955 op->hops = hops;
956 memcpy(&op->tv, &tv32, sizeof tv32);
957 }
958
959 i = sendto(sndsock, (char *)outpacket, datalen , 0,
960 (struct sockaddr *)&Dst, Dst.sin6_len);
961 if (i < 0 || i != (int)datalen) {
962 if (i < 0)
963 warnx("sendto");
964 printf("traceroute6: wrote %s %lu chars, ret=%d\n",
965 hostname, datalen, i);
966 (void) fflush(stdout);
967 }
968 }
969
970 #if 0
971 static int
972 get_hoplim(struct msghdr *mhdr)
973 {
974 struct cmsghdr *cm;
975
976 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
977 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
978 if (cm->cmsg_level == IPPROTO_IPV6 &&
979 cm->cmsg_type == IPV6_HOPLIMIT &&
980 cm->cmsg_len == CMSG_LEN(sizeof(int)))
981 return *(int *)CMSG_DATA(cm);
982 }
983
984 return -1;
985 }
986 #endif
987
988 static double
989 deltaT(struct timeval *t1p, struct timeval *t2p)
990 {
991 double dt;
992
993 dt = (double)(t2p->tv_sec - t1p->tv_sec) * 1000.0 +
994 (double)(t2p->tv_usec - t1p->tv_usec) / 1000.0;
995 return dt;
996 }
997
998 /*
999 * Convert an ICMP "type" field to a printable string.
1000 */
1001 static const char *
1002 pr_type(int t0)
1003 {
1004 u_char t = t0 & 0xff;
1005 const char *cp;
1006
1007 switch (t) {
1008 case ICMP6_DST_UNREACH:
1009 cp = "Destination Unreachable";
1010 break;
1011 case ICMP6_PACKET_TOO_BIG:
1012 cp = "Packet Too Big";
1013 break;
1014 case ICMP6_TIME_EXCEEDED:
1015 cp = "Time Exceeded";
1016 break;
1017 case ICMP6_PARAM_PROB:
1018 cp = "Parameter Problem";
1019 break;
1020 case ICMP6_ECHO_REQUEST:
1021 cp = "Echo Request";
1022 break;
1023 case ICMP6_ECHO_REPLY:
1024 cp = "Echo Reply";
1025 break;
1026 case ICMP6_MEMBERSHIP_QUERY:
1027 cp = "Group Membership Query";
1028 break;
1029 case ICMP6_MEMBERSHIP_REPORT:
1030 cp = "Group Membership Report";
1031 break;
1032 case ICMP6_MEMBERSHIP_REDUCTION:
1033 cp = "Group Membership Reduction";
1034 break;
1035 case ND_ROUTER_SOLICIT:
1036 cp = "Router Solicitation";
1037 break;
1038 case ND_ROUTER_ADVERT:
1039 cp = "Router Advertisement";
1040 break;
1041 case ND_NEIGHBOR_SOLICIT:
1042 cp = "Neighbor Solicitation";
1043 break;
1044 case ND_NEIGHBOR_ADVERT:
1045 cp = "Neighbor Advertisement";
1046 break;
1047 case ND_REDIRECT:
1048 cp = "Redirect";
1049 break;
1050 default:
1051 cp = "Unknown";
1052 break;
1053 }
1054 return cp;
1055 }
1056
1057 static int
1058 packet_ok(struct msghdr *mhdr, ssize_t cc, int seq)
1059 {
1060 struct icmp6_hdr *icp;
1061 struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name;
1062 u_char type, code;
1063 char *buf = (char *)mhdr->msg_iov[0].iov_base;
1064 struct cmsghdr *cm;
1065 int *hlimp;
1066 char hbuf[NI_MAXHOST];
1067
1068 #ifdef OLDRAWSOCKET
1069 int hlen;
1070 struct ip6_hdr *ip;
1071 #endif
1072
1073 #ifdef OLDRAWSOCKET
1074 ip = (struct ip6_hdr *) buf;
1075 hlen = sizeof(struct ip6_hdr);
1076 if (cc < hlen + sizeof(struct icmp6_hdr)) {
1077 if (verbose) {
1078 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1079 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
1080 strlcpy(hbuf, "invalid", sizeof(hbuf));
1081 printf("packet too short (%d bytes) from %s\n", cc,
1082 hbuf);
1083 }
1084 return 0;
1085 }
1086 cc -= hlen;
1087 icp = (struct icmp6_hdr *)(buf + hlen);
1088 #else
1089 if (cc < (ssize_t)sizeof(struct icmp6_hdr)) {
1090 if (verbose) {
1091 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1092 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
1093 strlcpy(hbuf, "invalid", sizeof(hbuf));
1094 printf("data too short (%zd bytes) from %s\n", cc,
1095 hbuf);
1096 }
1097 return 0;
1098 }
1099 icp = (struct icmp6_hdr *)buf;
1100 #endif
1101 /* get optional information via advanced API */
1102 rcvpktinfo = NULL;
1103 hlimp = NULL;
1104 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1105 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1106 if (cm->cmsg_level == IPPROTO_IPV6 &&
1107 cm->cmsg_type == IPV6_PKTINFO &&
1108 cm->cmsg_len ==
1109 CMSG_LEN(sizeof(struct in6_pktinfo)))
1110 rcvpktinfo = (struct in6_pktinfo *)(CMSG_DATA(cm));
1111
1112 if (cm->cmsg_level == IPPROTO_IPV6 &&
1113 cm->cmsg_type == IPV6_HOPLIMIT &&
1114 cm->cmsg_len == CMSG_LEN(sizeof(int)))
1115 hlimp = (int *)CMSG_DATA(cm);
1116 }
1117 if (rcvpktinfo == NULL || hlimp == NULL) {
1118 warnx("failed to get received hop limit or packet info");
1119 #if 0
1120 return 0;
1121 #else
1122 rcvhlim = 0; /*XXX*/
1123 #endif
1124 }
1125 else
1126 rcvhlim = *hlimp;
1127
1128 type = icp->icmp6_type;
1129 code = icp->icmp6_code;
1130 if ((type == ICMP6_TIME_EXCEEDED && code == ICMP6_TIME_EXCEED_TRANSIT)
1131 || type == ICMP6_DST_UNREACH) {
1132 struct ip6_hdr *hip;
1133 struct udphdr *up;
1134
1135 hip = (struct ip6_hdr *)(icp + 1);
1136 if ((up = get_udphdr(hip, (u_char *)(buf + cc))) == NULL) {
1137 if (verbose)
1138 warnx("failed to get upper layer header");
1139 return 0;
1140 }
1141 if (useicmp &&
1142 ((struct icmp6_hdr *)up)->icmp6_id == ident &&
1143 ((struct icmp6_hdr *)up)->icmp6_seq == htons(seq))
1144 return type == ICMP6_TIME_EXCEEDED ? -1 : code + 1;
1145 else if (!useicmp &&
1146 up->uh_sport == htons(srcport) &&
1147 up->uh_dport == htons(port + seq))
1148 return type == ICMP6_TIME_EXCEEDED ? -1 : code + 1;
1149 } else if (useicmp && type == ICMP6_ECHO_REPLY) {
1150 if (icp->icmp6_id == ident &&
1151 icp->icmp6_seq == htons(seq))
1152 return ICMP6_DST_UNREACH_NOPORT + 1;
1153 }
1154 if (verbose) {
1155 char sbuf[NI_MAXHOST+1], dbuf[INET6_ADDRSTRLEN];
1156 u_int8_t *p;
1157 ssize_t i;
1158
1159 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1160 sbuf, sizeof(sbuf), NULL, 0, NI_NUMERICHOST) != 0)
1161 strlcpy(sbuf, "invalid", sizeof(sbuf));
1162 printf("\n%zd bytes from %s to %s", cc, sbuf,
1163 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1164 dbuf, sizeof(dbuf)) : "?");
1165 printf(": icmp type %d (%s) code %d\n", type, pr_type(type),
1166 icp->icmp6_code);
1167 p = (u_int8_t *)(icp + 1);
1168 #define WIDTH 16
1169 for (i = 0; i < cc; i++) {
1170 if (i % WIDTH == 0)
1171 printf("%04zx:", i);
1172 if (i % 4 == 0)
1173 printf(" ");
1174 printf("%02x", p[i]);
1175 if (i % WIDTH == WIDTH - 1)
1176 printf("\n");
1177 }
1178 if (cc % WIDTH != 0)
1179 printf("\n");
1180 }
1181 return 0;
1182 }
1183
1184 /*
1185 * Increment pointer until find the UDP or ICMP header.
1186 */
1187 static struct udphdr *
1188 get_udphdr(struct ip6_hdr *ip6, u_char *lim)
1189 {
1190 u_char *cp = (u_char *)ip6, nh;
1191 int hlen;
1192
1193 if (cp + sizeof(*ip6) >= lim)
1194 return NULL;
1195
1196 nh = ip6->ip6_nxt;
1197 cp += sizeof(struct ip6_hdr);
1198
1199 while (lim - cp >= 8) {
1200 switch (nh) {
1201 case IPPROTO_ESP:
1202 case IPPROTO_TCP:
1203 return NULL;
1204 case IPPROTO_ICMPV6:
1205 return useicmp ? (struct udphdr *)cp : NULL;
1206 case IPPROTO_UDP:
1207 return useicmp ? NULL : (struct udphdr *)cp;
1208 case IPPROTO_FRAGMENT:
1209 hlen = sizeof(struct ip6_frag);
1210 nh = ((struct ip6_frag *)cp)->ip6f_nxt;
1211 break;
1212 case IPPROTO_AH:
1213 hlen = (((struct ip6_ext *)cp)->ip6e_len + 2) << 2;
1214 nh = ((struct ip6_ext *)cp)->ip6e_nxt;
1215 break;
1216 default:
1217 hlen = (((struct ip6_ext *)cp)->ip6e_len + 1) << 3;
1218 nh = ((struct ip6_ext *)cp)->ip6e_nxt;
1219 break;
1220 }
1221
1222 cp += hlen;
1223 }
1224
1225 return NULL;
1226 }
1227
1228 static void
1229 print(struct msghdr *mhdr, int cc)
1230 {
1231 struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name;
1232 char hbuf[NI_MAXHOST];
1233
1234 if (getnameinfo((struct sockaddr *)from, from->sin6_len,
1235 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
1236 strlcpy(hbuf, "invalid", sizeof(hbuf));
1237 if (as_path)
1238 printf(" [AS%u]", as_lookup(asn, hbuf, AF_INET6));
1239 if (nflag)
1240 printf(" %s", hbuf);
1241 else if (lflag)
1242 printf(" %s (%s)", inetname((struct sockaddr *)from), hbuf);
1243 else
1244 printf(" %s", inetname((struct sockaddr *)from));
1245
1246 if (verbose) {
1247 #ifdef OLDRAWSOCKET
1248 printf(" %d bytes to %s", cc,
1249 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1250 hbuf, sizeof(hbuf)) : "?");
1251 #else
1252 printf(" %d bytes of data to %s", cc,
1253 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
1254 hbuf, sizeof(hbuf)) : "?");
1255 #endif
1256 }
1257 }
1258
1259 /*
1260 * Construct an Internet address representation.
1261 * If the nflag has been supplied, give
1262 * numeric value, otherwise try for symbolic name.
1263 */
1264 static const char *
1265 inetname(struct sockaddr *sa)
1266 {
1267 static char line[NI_MAXHOST], domain[MAXHOSTNAMELEN + 1];
1268 static int first = 1;
1269 char *cp;
1270
1271 if (first && !nflag) {
1272 first = 0;
1273 if (gethostname(domain, sizeof(domain)) == 0 &&
1274 (cp = strchr(domain, '.')))
1275 (void) strlcpy(domain, cp + 1, sizeof(domain));
1276 else
1277 domain[0] = 0;
1278 }
1279 cp = NULL;
1280 if (!nflag) {
1281 if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
1282 NI_NAMEREQD) == 0) {
1283 if ((cp = strchr(line, '.')) &&
1284 !strcmp(cp + 1, domain))
1285 *cp = 0;
1286 cp = line;
1287 }
1288 }
1289 if (cp)
1290 return cp;
1291
1292 if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
1293 NI_NUMERICHOST) != 0)
1294 strlcpy(line, "invalid", sizeof(line));
1295 return line;
1296 }
1297
1298 static void
1299 usage(void)
1300 {
1301
1302 fprintf(stderr,
1303 "Usage: %s [-adIlnrv] [-A as_server] [-f firsthop] [-g gateway]\n"
1304 "\t[-m hoplimit] [-p port] [-q probes] [-s src] [-w waittime] target [datalen]\n",
1305 getprogname());
1306 exit(1);
1307 }
MINIX 3 (repo.or.cz mirror)