1 /* $KAME: traceroute6.c,v 1.29 2000/06/12 16:29:18 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1990, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Van Jacobson. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by the University of 50 * California, Berkeley and its contributors. 51 * 4. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 #ifndef lint 69 static char copyright[] = 70 "@(#) Copyright (c) 1990, 1993\n\ 71 The Regents of the University of California. All rights reserved.\n"; 72 #endif /* not lint */ 73 74 #ifndef lint 75 #if 0 76 static char sccsid[] = "@(#)traceroute.c 8.1 (Berkeley) 6/6/93"; 77 #endif 78 static const char rcsid[] = 79 "$FreeBSD$"; 80 #endif /* not lint */ 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> 259 260 #include <netinet/in.h> 261 262 #include <arpa/inet.h> 263 264 #include <netdb.h> 265 #include <stdio.h> 266 #include <err.h> 267 #include <errno.h> 268 #include <stdlib.h> 269 #include <string.h> 270 #include <unistd.h> 271 272 #include <netinet/ip6.h> 273 #include <netinet/icmp6.h> 274 #include <netinet/udp.h> 275 276 #ifdef IPSEC 277 #include <net/route.h> 278 #include <netinet6/ipsec.h> 279 #endif 280 281 #define DUMMY_PORT 10010 282 283 #define MAXPACKET 65535 /* max ip packet size */ 284 #ifndef MAXHOSTNAMELEN 285 #define MAXHOSTNAMELEN 64 286 #endif 287 288 #ifndef FD_SET 289 #define NFDBITS (8*sizeof(fd_set)) 290 #define FD_SETSIZE NFDBITS 291 #define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS))) 292 #define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS))) 293 #define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS))) 294 #define FD_ZERO(p) bzero((char *)(p), sizeof(*(p))) 295 #endif 296 297 #define Fprintf (void)fprintf 298 #define Sprintf (void)sprintf 299 #define Printf (void)printf 300 301 #ifndef HAVE_GETIPNODEBYNAME 302 #define getipnodebyname(x, y, z, u) gethostbyname2((x), (y)) 303 #define freehostent(x) 304 #endif 305 306 /* 307 * format of a (udp) probe packet. 308 */ 309 struct opacket { 310 u_char seq; /* sequence number of this packet */ 311 u_char hops; /* hop limit of the packet */ 312 struct timeval tv; /* time packet left */ 313 }; 314 315 u_char packet[512]; /* last inbound (icmp) packet */ 316 struct opacket *outpacket; /* last output (udp) packet */ 317 318 int main __P((int, char *[])); 319 int wait_for_reply __P((int, struct msghdr *)); 320 #ifdef IPSEC 321 #ifdef IPSEC_POLICY_IPSEC 322 int setpolicy __P((int so, char *policy)); 323 #endif 324 #endif 325 void send_probe __P((int, int)); 326 struct udphdr *get_udphdr __P((struct ip6_hdr *, u_char *)); 327 int get_hoplim __P((struct msghdr *)); 328 double deltaT __P((struct timeval *, struct timeval *)); 329 char *pr_type __P((int)); 330 int packet_ok __P((struct msghdr *, int, int)); 331 void print __P((struct msghdr *, int)); 332 void tvsub __P((struct timeval *, struct timeval *)); 333 const char *inetname __P((struct sockaddr *)); 334 void usage __P((void)); 335 336 int rcvsock; /* receive (icmp) socket file descriptor */ 337 int sndsock; /* send (udp) socket file descriptor */ 338 struct timezone tz; /* leftover */ 339 340 struct msghdr rcvmhdr; 341 struct iovec rcviov[2]; 342 int rcvhlim; 343 struct in6_pktinfo *rcvpktinfo; 344 345 struct sockaddr_in6 Src, Dst, Rcv; 346 int datalen; /* How much data */ 347 /* XXX: 2064 = 127(max hops in type 0 rthdr) * sizeof(ip6_hdr) + 16(margin) */ 348 char rtbuf[2064]; 349 #ifdef USE_RFC2292BIS 350 struct ip6_rthdr *rth; 351 #endif 352 struct cmsghdr *cmsg; 353 354 char *source = 0; 355 char *hostname; 356 357 int nprobes = 3; 358 int first_hop = 1; 359 int max_hops = 30; 360 u_short ident; 361 u_short port = 32768+666; /* start udp dest port # for probe packets */ 362 int options; /* socket options */ 363 int verbose; 364 int waittime = 5; /* time to wait for response (in seconds) */ 365 int nflag; /* print addresses numerically */ 366 int lflag; /* print both numerical address & hostname */ 367 368 #ifdef KAME_SCOPEID 369 const int niflag = NI_WITHSCOPEID; 370 #else 371 const int niflag = 0; 372 #endif 373 374 int 375 main(argc, argv) 376 int argc; 377 char *argv[]; 378 { 379 struct hostent *hp; 380 int error; 381 struct addrinfo hints, *res; 382 int ch, i, on, probe, seq, hops, rcvcmsglen; 383 static u_char *rcvcmsgbuf; 384 char hbuf[NI_MAXHOST], src0[NI_MAXHOST]; 385 386 /* 387 * Receive ICMP 388 */ 389 if ((rcvsock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) { 390 perror("socket(ICMPv6)"); 391 exit(5); 392 } 393 394 /* set a minimum set of socket options */ 395 on = 1; 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 /* revoke privs */ 419 seteuid(getuid()); 420 setuid(getuid()); 421 422 seq = 0; 423 424 while ((ch = getopt(argc, argv, "df:g:lm:np:q:rs:w:v")) != EOF) 425 switch(ch) { 426 case 'd': 427 options |= SO_DEBUG; 428 break; 429 case 'f': 430 first_hop = atoi(optarg); 431 if (first_hop > max_hops) { 432 Fprintf(stderr, 433 "traceroute6: min hoplimit must be <= %d.\n", max_hops); 434 exit(1); 435 } 436 break; 437 case 'g': 438 hp = getipnodebyname(optarg, AF_INET6, 0, &h_errno); 439 if (hp == NULL) { 440 Fprintf(stderr, 441 "traceroute6: unknown host %s\n", optarg); 442 exit(1); 443 } 444 #ifdef USE_RFC2292BIS 445 if (rth == NULL) { 446 /* 447 * XXX: We can't detect the number of 448 * intermediate nodes yet. 449 */ 450 if ((rth = inet6_rth_init((void *)rtbuf, 451 sizeof(rtbuf), 452 IPV6_RTHDR_TYPE_0, 453 0)) == NULL) { 454 Fprintf(stderr, 455 "inet6_rth_init failed.\n"); 456 exit(1); 457 } 458 } 459 if (inet6_rth_add((void *)rth, 460 (struct in6_addr *)hp->h_addr)) { 461 Fprintf(stderr, 462 "inet6_rth_add failed for %s\n", 463 optarg); 464 exit(1); 465 } 466 #else /* old advanced API */ 467 if (cmsg == NULL) 468 cmsg = inet6_rthdr_init(rtbuf, IPV6_RTHDR_TYPE_0); 469 inet6_rthdr_add(cmsg, (struct in6_addr *)hp->h_addr, IPV6_RTHDR_LOOSE); 470 #endif 471 freehostent(hp); 472 break; 473 case 'l': 474 lflag++; 475 break; 476 case 'm': 477 max_hops = atoi(optarg); 478 if (max_hops < first_hop) { 479 Fprintf(stderr, 480 "traceroute6: max hoplimit must be >= %d.\n", first_hop); 481 exit(1); 482 } 483 break; 484 case 'n': 485 nflag++; 486 break; 487 case 'p': 488 port = atoi(optarg); 489 if (port < 1) { 490 Fprintf(stderr, 491 "traceroute6: port must be >0.\n"); 492 exit(1); 493 } 494 break; 495 case 'q': 496 nprobes = atoi(optarg); 497 if (nprobes < 1) { 498 Fprintf(stderr, 499 "traceroute6: nprobes must be >0.\n"); 500 exit(1); 501 } 502 break; 503 case 'r': 504 options |= SO_DONTROUTE; 505 break; 506 case 's': 507 /* 508 * set the ip source address of the outbound 509 * probe (e.g., on a multi-homed host). 510 */ 511 source = optarg; 512 break; 513 case 'v': 514 verbose++; 515 break; 516 case 'w': 517 waittime = atoi(optarg); 518 if (waittime <= 1) { 519 Fprintf(stderr, 520 "traceroute6: wait must be >1 sec.\n"); 521 exit(1); 522 } 523 break; 524 default: 525 usage(); 526 } 527 argc -= optind; 528 argv += optind; 529 530 if (argc < 1) 531 usage(); 532 533 #if 1 534 setvbuf(stdout, NULL, _IOLBF, BUFSIZ); 535 #else 536 setlinebuf (stdout); 537 #endif 538 539 memset(&hints, 0, sizeof(hints)); 540 hints.ai_family = PF_INET6; 541 hints.ai_socktype = SOCK_RAW; 542 hints.ai_protocol = IPPROTO_ICMPV6; 543 hints.ai_flags = AI_CANONNAME; 544 error = getaddrinfo(*argv, NULL, &hints, &res); 545 if (error) { 546 (void)fprintf(stderr, 547 "traceroute6: %s\n", gai_strerror(error)); 548 exit(1); 549 } 550 if (res->ai_addrlen != sizeof(Dst)) { 551 (void)fprintf(stderr, 552 "traceroute6: size of sockaddr mismatch\n"); 553 exit(1); 554 } 555 memcpy(&Dst, res->ai_addr, res->ai_addrlen); 556 hostname = res->ai_canonname ? strdup(res->ai_canonname) : *argv; 557 558 if (*++argv) 559 datalen = atoi(*argv); 560 if (datalen < 0 || datalen >= MAXPACKET - sizeof(struct opacket)) { 561 Fprintf(stderr, 562 "traceroute6: packet size must be 0 <= s < %ld.\n", 563 (long)(MAXPACKET - sizeof(struct opacket))); 564 exit(1); 565 } 566 datalen += sizeof(struct opacket); 567 outpacket = (struct opacket *)malloc((unsigned)datalen); 568 if (! outpacket) { 569 perror("malloc"); 570 exit(1); 571 } 572 (void) bzero((char *)outpacket, datalen); 573 574 /* initialize msghdr for receiving packets */ 575 rcviov[0].iov_base = (caddr_t)packet; 576 rcviov[0].iov_len = sizeof(packet); 577 rcvmhdr.msg_name = (caddr_t)&Rcv; 578 rcvmhdr.msg_namelen = sizeof(Rcv); 579 rcvmhdr.msg_iov = rcviov; 580 rcvmhdr.msg_iovlen = 1; 581 rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) 582 + CMSG_SPACE(sizeof(int)); 583 if ((rcvcmsgbuf = malloc(rcvcmsglen)) == NULL) { 584 Fprintf(stderr, "traceroute6: malloc failed\n"); 585 exit(1); 586 } 587 rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf; 588 rcvmhdr.msg_controllen = rcvcmsglen; 589 590 if (options & SO_DEBUG) 591 (void) setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG, 592 (char *)&on, sizeof(on)); 593 if (options & SO_DONTROUTE) 594 (void) setsockopt(rcvsock, SOL_SOCKET, SO_DONTROUTE, 595 (char *)&on, sizeof(on)); 596 #ifdef IPSEC 597 #ifdef IPSEC_POLICY_IPSEC 598 /* 599 * do not raise error even if setsockopt fails, kernel may have ipsec 600 * turned off. 601 */ 602 if (setpolicy(rcvsock, "in bypass") < 0) 603 errx(1, ipsec_strerror()); 604 if (setpolicy(rcvsock, "out bypass") < 0) 605 errx(1, ipsec_strerror()); 606 #else 607 { 608 int level = IPSEC_LEVEL_NONE; 609 610 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level, 611 sizeof(level)); 612 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level, 613 sizeof(level)); 614 #ifdef IP_AUTH_TRANS_LEVEL 615 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level, 616 sizeof(level)); 617 #else 618 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level, 619 sizeof(level)); 620 #endif 621 #ifdef IP_AUTH_NETWORK_LEVEL 622 (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level, 623 sizeof(level)); 624 #endif 625 } 626 #endif /*IPSEC_POLICY_IPSEC*/ 627 #endif /*IPSEC*/ 628 629 /* 630 * Send UDP 631 */ 632 if ((sndsock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 633 perror("socket(SOCK_DGRAM)"); 634 exit(5); 635 } 636 #ifdef SO_SNDBUF 637 if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&datalen, 638 sizeof(datalen)) < 0) { 639 perror("setsockopt(SO_SNDBUF)"); 640 exit(6); 641 } 642 #endif /* SO_SNDBUF */ 643 if (options & SO_DEBUG) 644 (void) setsockopt(sndsock, SOL_SOCKET, SO_DEBUG, 645 (char *)&on, sizeof(on)); 646 if (options & SO_DONTROUTE) 647 (void) setsockopt(sndsock, SOL_SOCKET, SO_DONTROUTE, 648 (char *)&on, sizeof(on)); 649 #ifdef USE_RFC2292BIS 650 if (rth) {/* XXX: there is no library to finalize the header... */ 651 rth->ip6r_len = rth->ip6r_segleft * 2; 652 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_RTHDR, 653 (void *)rth, (rth->ip6r_len + 1) << 3)) { 654 Fprintf(stderr, "setsockopt(IPV6_RTHDR): %s\n", 655 strerror(errno)); 656 exit(1); 657 } 658 } 659 #else /* old advanced API */ 660 if (cmsg != NULL) { 661 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE); 662 if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_PKTOPTIONS, 663 rtbuf, cmsg->cmsg_len) < 0) { 664 Fprintf(stderr, "setsockopt(IPV6_PKTOPTIONS): %s\n", 665 strerror(errno)); 666 exit(1); 667 } 668 } 669 #endif /* USE_RFC2292BIS */ 670 #ifdef IPSEC 671 #ifdef IPSEC_POLICY_IPSEC 672 /* 673 * do not raise error even if setsockopt fails, kernel may have ipsec 674 * turned off. 675 */ 676 if (setpolicy(sndsock, "in bypass") < 0) 677 errx(1, ipsec_strerror()); 678 if (setpolicy(sndsock, "out bypass") < 0) 679 errx(1, ipsec_strerror()); 680 #else 681 { 682 int level = IPSEC_LEVEL_BYPASS; 683 684 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level, 685 sizeof(level)); 686 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level, 687 sizeof(level)); 688 #ifdef IP_AUTH_TRANS_LEVEL 689 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level, 690 sizeof(level)); 691 #else 692 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level, 693 sizeof(level)); 694 #endif 695 #ifdef IP_AUTH_NETWORK_LEVEL 696 (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level, 697 sizeof(level)); 698 #endif 699 } 700 #endif /*IPSEC_POLICY_IPSEC*/ 701 #endif /*IPSEC*/ 702 703 /* 704 * Source selection 705 */ 706 bzero(&Src, sizeof(Src)); 707 if (source) { 708 struct addrinfo hints, *res; 709 int error; 710 711 memset(&hints, 0, sizeof(hints)); 712 hints.ai_family = AF_INET6; 713 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 714 hints.ai_flags = AI_NUMERICHOST; 715 error = getaddrinfo(source, "0", &hints, &res); 716 if (error) { 717 Printf("traceroute6: %s: %s\n", source, 718 gai_strerror(error)); 719 exit(1); 720 } 721 if (res->ai_addrlen > sizeof(Src)) { 722 Printf("traceroute6: %s: %s\n", source, 723 gai_strerror(error)); 724 exit(1); 725 } 726 memcpy(&Src, res->ai_addr, res->ai_addrlen); 727 freeaddrinfo(res); 728 } else { 729 struct sockaddr_in6 Nxt; 730 int dummy, len; 731 732 Nxt = Dst; 733 Nxt.sin6_port = htons(DUMMY_PORT); 734 if (cmsg != NULL) 735 bcopy(inet6_rthdr_getaddr(cmsg, 1), &Nxt.sin6_addr, 736 sizeof(Nxt.sin6_addr)); 737 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 738 perror("socket"); 739 exit(1); 740 } 741 if (connect(dummy, (struct sockaddr *)&Nxt, Nxt.sin6_len) < 0) { 742 perror("connect"); 743 exit(1); 744 } 745 len = sizeof(Src); 746 if (getsockname(dummy, (struct sockaddr *)&Src, &len) < 0) { 747 perror("getsockname"); 748 exit(1); 749 } 750 if (getnameinfo((struct sockaddr *)&Src, Src.sin6_len, 751 src0, sizeof(src0), NULL, 0, 752 NI_NUMERICHOST | niflag)) { 753 Fprintf(stderr, "getnameinfo failed for source\n"); 754 exit(1); 755 } 756 source = src0; 757 close(dummy); 758 } 759 760 #if 1 761 ident = (getpid() & 0xffff) | 0x8000; 762 #else 763 ident = 0; /*let the kernel pick one*/ 764 #endif 765 Src.sin6_port = htons(ident); 766 if (bind(sndsock, (struct sockaddr *)&Src, Src.sin6_len) < 0) { 767 perror("bind"); 768 exit(1); 769 } 770 771 if (ident == 0) { 772 int len; 773 774 len = sizeof(Src); 775 if (getsockname(sndsock, (struct sockaddr *)&Src, &i) < 0) { 776 perror("getsockname"); 777 exit(1); 778 } 779 ident = ntohs(Src.sin6_port); 780 } 781 782 /* 783 * Message to users 784 */ 785 if (getnameinfo((struct sockaddr *)&Dst, Dst.sin6_len, hbuf, 786 sizeof(hbuf), NULL, 0, NI_NUMERICHOST | niflag)) 787 strcpy(hbuf, "(invalid)"); 788 Fprintf(stderr, "traceroute6"); 789 Fprintf(stderr, " to %s (%s)", hostname, hbuf); 790 if (source) 791 Fprintf(stderr, " from %s", source); 792 Fprintf(stderr, 793 ", %d hops max, %d byte packets\n", 794 max_hops, datalen); 795 (void) fflush(stderr); 796 797 if (first_hop > 1) 798 Printf("Skipping %d intermediate hops\n", first_hop - 1); 799 800 /* 801 * Main loop 802 */ 803 for (hops = first_hop; hops <= max_hops; ++hops) { 804 struct in6_addr lastaddr; 805 int got_there = 0; 806 int unreachable = 0; 807 808 Printf("%2d ", hops); 809 bzero(&lastaddr, sizeof(lastaddr)); 810 for (probe = 0; probe < nprobes; ++probe) { 811 int cc; 812 struct timeval t1, t2; 813 struct timezone tz; 814 815 (void) gettimeofday(&t1, &tz); 816 send_probe(++seq, hops); 817 while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) { 818 (void) gettimeofday(&t2, &tz); 819 if ((i = packet_ok(&rcvmhdr, cc, seq))) { 820 if (! IN6_ARE_ADDR_EQUAL(&Rcv.sin6_addr, 821 &lastaddr)) { 822 print(&rcvmhdr, cc); 823 lastaddr = Rcv.sin6_addr; 824 } 825 Printf(" %g ms", deltaT(&t1, &t2)); 826 switch(i - 1) { 827 case ICMP6_DST_UNREACH_NOROUTE: 828 ++unreachable; 829 Printf(" !N"); 830 break; 831 case ICMP6_DST_UNREACH_ADMIN: 832 ++unreachable; 833 Printf(" !P"); 834 break; 835 case ICMP6_DST_UNREACH_NOTNEIGHBOR: 836 ++unreachable; 837 Printf(" !S"); 838 break; 839 case ICMP6_DST_UNREACH_ADDR: 840 ++unreachable; 841 Printf(" !A"); 842 break; 843 case ICMP6_DST_UNREACH_NOPORT: 844 if (rcvhlim >= 0 && 845 rcvhlim <= 1) 846 Printf(" !"); 847 ++got_there; 848 break; 849 } 850 break; 851 } 852 } 853 if (cc == 0) 854 Printf(" *"); 855 (void) fflush(stdout); 856 } 857 putchar('\n'); 858 if (got_there || 859 (unreachable > 0 && unreachable >= ((nprobes + 1) / 2))) { 860 exit(0); 861 } 862 } 863 864 exit(0); 865 } 866 867 int 868 wait_for_reply(sock, mhdr) 869 int sock; 870 struct msghdr *mhdr; 871 { 872 fd_set fds; 873 struct timeval wait; 874 int cc = 0; 875 876 FD_ZERO(&fds); 877 FD_SET(sock, &fds); 878 wait.tv_sec = waittime; wait.tv_usec = 0; 879 880 if (select(sock+1, &fds, (fd_set *)0, (fd_set *)0, &wait) > 0) 881 cc = recvmsg(rcvsock, mhdr, 0); 882 883 return(cc); 884 } 885 886 #ifdef IPSEC 887 #ifdef IPSEC_POLICY_IPSEC 888 int 889 setpolicy(so, policy) 890 int so; 891 char *policy; 892 { 893 char *buf; 894 895 buf = ipsec_set_policy(policy, strlen(policy)); 896 if (buf == NULL) { 897 warnx("%s", ipsec_strerror()); 898 return -1; 899 } 900 (void)setsockopt(so, IPPROTO_IPV6, IPV6_IPSEC_POLICY, 901 buf, ipsec_get_policylen(buf)); 902 903 free(buf); 904 905 return 0; 906 } 907 #endif 908 #endif 909 910 void 911 send_probe(seq, hops) 912 int seq, hops; 913 { 914 struct opacket *op = outpacket; 915 int i; 916 917 if(setsockopt(sndsock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 918 (char *)&hops, sizeof(hops)) < 0) { 919 perror("setsockopt IPV6_UNICAST_HOPS"); 920 } 921 922 Dst.sin6_port = htons(port + seq); 923 924 op->seq = seq; 925 op->hops = hops; 926 (void) gettimeofday(&op->tv, &tz); 927 928 i = sendto(sndsock, (char *)outpacket, datalen , 0, 929 (struct sockaddr *)&Dst, Dst.sin6_len); 930 if (i < 0 || i != datalen) { 931 if (i<0) 932 perror("sendto"); 933 Printf("traceroute6: wrote %s %d chars, ret=%d\n", hostname, 934 datalen, i); 935 (void) fflush(stdout); 936 } 937 } 938 939 int 940 get_hoplim(mhdr) 941 struct msghdr *mhdr; 942 { 943 struct cmsghdr *cm; 944 945 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 946 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 947 if (cm->cmsg_level == IPPROTO_IPV6 && 948 cm->cmsg_type == IPV6_HOPLIMIT && 949 cm->cmsg_len == CMSG_LEN(sizeof(int))) 950 return(*(int *)CMSG_DATA(cm)); 951 } 952 953 return(-1); 954 } 955 956 double 957 deltaT(t1p, t2p) 958 struct timeval *t1p, *t2p; 959 { 960 register double dt; 961 962 dt = (double)(t2p->tv_sec - t1p->tv_sec) * 1000.0 + 963 (double)(t2p->tv_usec - t1p->tv_usec) / 1000.0; 964 return (dt); 965 } 966 967 968 /* 969 * Convert an ICMP "type" field to a printable string. 970 */ 971 char * 972 pr_type(t0) 973 int t0; 974 { 975 u_char t = t0 & 0xff; 976 char *cp; 977 978 switch (t) { 979 case ICMP6_DST_UNREACH: 980 cp = "Destination Unreachable"; 981 break; 982 case ICMP6_PACKET_TOO_BIG: 983 cp = "Pakcet Too Big"; 984 break; 985 case ICMP6_TIME_EXCEEDED: 986 cp = "Time Exceeded"; 987 break; 988 case ICMP6_PARAM_PROB: 989 cp = "Parameter Problem"; 990 break; 991 case ICMP6_ECHO_REQUEST: 992 cp = "Echo Request"; 993 break; 994 case ICMP6_ECHO_REPLY: 995 cp = "Echo Reply"; 996 break; 997 case ICMP6_MEMBERSHIP_QUERY: 998 cp = "Group Membership Query"; 999 break; 1000 case ICMP6_MEMBERSHIP_REPORT: 1001 cp = "Group Membership Report"; 1002 break; 1003 case ICMP6_MEMBERSHIP_REDUCTION: 1004 cp = "Group Membership Reduction"; 1005 break; 1006 case ND_ROUTER_SOLICIT: 1007 cp = "Router Solicitation"; 1008 break; 1009 case ND_ROUTER_ADVERT: 1010 cp = "Router Advertisement"; 1011 break; 1012 case ND_NEIGHBOR_SOLICIT: 1013 cp = "Neighbor Solicitation"; 1014 break; 1015 case ND_NEIGHBOR_ADVERT: 1016 cp = "Neighbor Advertisement"; 1017 break; 1018 case ND_REDIRECT: 1019 cp = "Redirect"; 1020 break; 1021 default: 1022 cp = "Unknown"; 1023 break; 1024 } 1025 return cp; 1026 } 1027 1028 1029 int 1030 packet_ok(mhdr, cc, seq) 1031 struct msghdr *mhdr; 1032 int cc; 1033 int seq; 1034 { 1035 register struct icmp6_hdr *icp; 1036 struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name; 1037 u_char type, code; 1038 char *buf = (char *)mhdr->msg_iov[0].iov_base; 1039 struct cmsghdr *cm; 1040 int *hlimp; 1041 char hbuf[NI_MAXHOST]; 1042 1043 #ifdef OLDRAWSOCKET 1044 int hlen; 1045 struct ip6_hdr *ip; 1046 #endif 1047 1048 #ifdef OLDRAWSOCKET 1049 ip = (struct ip6_hdr *) buf; 1050 hlen = sizeof(struct ip6_hdr); 1051 if (cc < hlen + sizeof(struct icmp6_hdr)) { 1052 if (verbose) { 1053 if (getnameinfo((struct sockaddr *)from, from->sin6_len, 1054 hbuf, sizeof(hbuf), NULL, 0, 1055 NI_NUMERICHOST | niflag) != 0) 1056 strcpy(hbuf, "invalid"); 1057 Printf("packet too short (%d bytes) from %s\n", cc, 1058 hbuf); 1059 } 1060 return (0); 1061 } 1062 cc -= hlen; 1063 icp = (struct icmp6_hdr *)(buf + hlen); 1064 #else 1065 if (cc < sizeof(struct icmp6_hdr)) { 1066 if (verbose) { 1067 if (getnameinfo((struct sockaddr *)from, from->sin6_len, 1068 hbuf, sizeof(hbuf), NULL, 0, 1069 NI_NUMERICHOST | niflag) != 0) 1070 strcpy(hbuf, "invalid"); 1071 Printf("data too short (%d bytes) from %s\n", cc, hbuf); 1072 } 1073 return(0); 1074 } 1075 icp = (struct icmp6_hdr *)buf; 1076 #endif 1077 /* get optional information via advanced API */ 1078 rcvpktinfo = NULL; 1079 hlimp = NULL; 1080 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1081 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1082 if (cm->cmsg_level == IPPROTO_IPV6 && 1083 cm->cmsg_type == IPV6_PKTINFO && 1084 cm->cmsg_len == 1085 CMSG_LEN(sizeof(struct in6_pktinfo))) 1086 rcvpktinfo = (struct in6_pktinfo *)(CMSG_DATA(cm)); 1087 1088 if (cm->cmsg_level == IPPROTO_IPV6 && 1089 cm->cmsg_type == IPV6_HOPLIMIT && 1090 cm->cmsg_len == CMSG_LEN(sizeof(int))) 1091 hlimp = (int *)CMSG_DATA(cm); 1092 } 1093 if (rcvpktinfo == NULL || hlimp == NULL) { 1094 warnx("failed to get received hop limit or packet info"); 1095 #if 0 1096 return(0); 1097 #else 1098 rcvhlim = 0; /*XXX*/ 1099 #endif 1100 } 1101 else 1102 rcvhlim = *hlimp; 1103 1104 type = icp->icmp6_type; 1105 code = icp->icmp6_code; 1106 if ((type == ICMP6_TIME_EXCEEDED && code == ICMP6_TIME_EXCEED_TRANSIT) 1107 || type == ICMP6_DST_UNREACH) { 1108 struct ip6_hdr *hip; 1109 struct udphdr *up; 1110 1111 hip = (struct ip6_hdr *)(icp + 1); 1112 if ((up = get_udphdr(hip, (u_char *)(buf + cc))) == NULL) { 1113 if (verbose) 1114 warnx("failed to get upper layer header"); 1115 return(0); 1116 } 1117 if (up->uh_sport == htons(ident) && 1118 up->uh_dport == htons(port+seq)) 1119 return (type == ICMP6_TIME_EXCEEDED ? -1 : code + 1); 1120 } 1121 if (verbose) { 1122 int i; 1123 u_int8_t *p; 1124 char sbuf[NI_MAXHOST+1], dbuf[INET6_ADDRSTRLEN]; 1125 1126 if (getnameinfo((struct sockaddr *)from, from->sin6_len, 1127 sbuf, sizeof(sbuf), NULL, 0, NI_NUMERICHOST | niflag) != 0) 1128 strcpy(sbuf, "invalid"); 1129 Printf("\n%d bytes from %s to %s", cc, sbuf, 1130 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, 1131 dbuf, sizeof(dbuf)) 1132 : "?"); 1133 Printf(": icmp type %d (%s) code %d\n", type, pr_type(type), 1134 icp->icmp6_code); 1135 p = (u_int8_t *)(icp + 1); 1136 #define WIDTH 16 1137 for (i = 0; i < cc; i++) { 1138 if (i % WIDTH == 0) 1139 Printf("%04x:", i); 1140 if (i % 4 == 0) 1141 Printf(" "); 1142 Printf("%02x", p[i]); 1143 if (i % WIDTH == WIDTH - 1) 1144 Printf("\n"); 1145 } 1146 if (cc % WIDTH != 0) 1147 Printf("\n"); 1148 } 1149 return(0); 1150 } 1151 1152 /* 1153 * Increment pointer until find the UDP header. 1154 */ 1155 struct udphdr * 1156 get_udphdr(ip6, lim) 1157 struct ip6_hdr *ip6; 1158 u_char *lim; 1159 { 1160 u_char *cp = (u_char *)ip6, nh; 1161 int hlen; 1162 1163 if (cp + sizeof(*ip6) >= lim) 1164 return(NULL); 1165 1166 nh = ip6->ip6_nxt; 1167 cp += sizeof(struct ip6_hdr); 1168 1169 while(lim - cp >= 8) { 1170 switch(nh) { 1171 case IPPROTO_ESP: 1172 case IPPROTO_TCP: 1173 case IPPROTO_ICMPV6: 1174 return(NULL); 1175 case IPPROTO_UDP: 1176 return((struct udphdr *)cp); 1177 case IPPROTO_FRAGMENT: 1178 hlen = sizeof(struct ip6_frag); 1179 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 1180 break; 1181 case IPPROTO_AH: 1182 hlen = (((struct ip6_ext *)cp)->ip6e_len + 2) << 2; 1183 nh = ((struct ip6_ext *)cp)->ip6e_nxt; 1184 break; 1185 default: 1186 hlen = (((struct ip6_ext *)cp)->ip6e_len + 1) << 3; 1187 nh = ((struct ip6_ext *)cp)->ip6e_nxt; 1188 break; 1189 } 1190 1191 cp += hlen; 1192 } 1193 1194 return(NULL); 1195 } 1196 1197 void 1198 print(mhdr, cc) 1199 struct msghdr *mhdr; 1200 int cc; 1201 { 1202 struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name; 1203 char hbuf[NI_MAXHOST]; 1204 1205 if (getnameinfo((struct sockaddr *)from, from->sin6_len, 1206 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST | niflag) != 0) 1207 strcpy(hbuf, "invalid"); 1208 if (nflag) 1209 Printf(" %s", hbuf); 1210 else if (lflag) 1211 Printf(" %s (%s)", inetname((struct sockaddr *)from), hbuf); 1212 else 1213 Printf(" %s", inetname((struct sockaddr *)from)); 1214 1215 if (verbose) { 1216 #ifdef OLDRAWSOCKET 1217 Printf(" %d bytes to %s", cc, 1218 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, 1219 hbuf, sizeof(hbuf)) 1220 : "?"); 1221 #else 1222 Printf(" %d bytes of data to %s", cc, 1223 rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, 1224 hbuf, sizeof(hbuf)) 1225 : "?"); 1226 #endif 1227 } 1228 } 1229 1230 /* 1231 * Subtract 2 timeval structs: out = out - in. 1232 * Out is assumed to be >= in. 1233 */ 1234 void 1235 tvsub(out, in) 1236 register struct timeval *out, *in; 1237 { 1238 if ((out->tv_usec -= in->tv_usec) < 0) { 1239 out->tv_sec--; 1240 out->tv_usec += 1000000; 1241 } 1242 out->tv_sec -= in->tv_sec; 1243 } 1244 1245 1246 /* 1247 * Construct an Internet address representation. 1248 * If the nflag has been supplied, give 1249 * numeric value, otherwise try for symbolic name. 1250 */ 1251 const char * 1252 inetname(sa) 1253 struct sockaddr *sa; 1254 { 1255 register char *cp; 1256 static char line[NI_MAXHOST]; 1257 static char domain[MAXHOSTNAMELEN + 1]; 1258 static int first = 1; 1259 1260 if (first && !nflag) { 1261 first = 0; 1262 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 1263 (cp = index(domain, '.'))) 1264 (void) strcpy(domain, cp + 1); 1265 else 1266 domain[0] = 0; 1267 } 1268 cp = NULL; 1269 if (!nflag) { 1270 if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0, 1271 NI_NAMEREQD) == 0) { 1272 if ((cp = index(line, '.')) && 1273 !strcmp(cp + 1, domain)) 1274 *cp = 0; 1275 cp = line; 1276 } 1277 } 1278 if (cp) 1279 return cp; 1280 1281 if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0, 1282 NI_NUMERICHOST | niflag) != 0) 1283 strcpy(line, "invalid"); 1284 return line; 1285 } 1286 1287 void 1288 usage() 1289 { 1290 (void)fprintf(stderr, 1291 "usage: traceroute6 [-dlnrv] [-f first_hop] [-m max_hops] [-p port#] \n" 1292 " [-q nqueries] [-s src_addr] [-g gateway] [-w wait] host [data size]\n"); 1293 exit(1); 1294 } 1295