ping6.c revision 1.34
1 /* $NetBSD: ping6.c,v 1.34 2001/05/09 11:19:13 itojun Exp $ */ 2 /* $KAME: ping6.c,v 1.125 2001/05/09 11:17:33 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 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */ 34 35 /* 36 * Copyright (c) 1989, 1993 37 * The Regents of the University of California. All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Mike Muuss. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #if 0 72 #ifndef lint 73 static char copyright[] = 74 "@(#) Copyright (c) 1989, 1993\n\ 75 The Regents of the University of California. All rights reserved.\n"; 76 #endif /* not lint */ 77 78 #ifndef lint 79 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 80 #endif /* not lint */ 81 #else 82 #include <sys/cdefs.h> 83 #ifndef lint 84 __RCSID("$NetBSD: ping6.c,v 1.34 2001/05/09 11:19:13 itojun Exp $"); 85 #endif 86 #endif 87 88 /* 89 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 90 * measure round-trip-delays and packet loss across network paths. 91 * 92 * Author - 93 * Mike Muuss 94 * U. S. Army Ballistic Research Laboratory 95 * December, 1983 96 * 97 * Status - 98 * Public Domain. Distribution Unlimited. 99 * Bugs - 100 * More statistics could always be gathered. 101 * This program has to run SUID to ROOT to access the ICMP socket. 102 */ 103 /* 104 * NOTE: 105 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics 106 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link* 107 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of 108 * network attached to 1 or more interfaces) 109 */ 110 111 #include <sys/param.h> 112 #include <sys/uio.h> 113 #include <sys/socket.h> 114 #include <sys/time.h> 115 116 #include <net/if.h> 117 #include <net/route.h> 118 119 #include <netinet/in.h> 120 #include <netinet/ip6.h> 121 #include <netinet/icmp6.h> 122 #include <arpa/inet.h> 123 #include <arpa/nameser.h> 124 #include <netdb.h> 125 126 #include <ctype.h> 127 #include <err.h> 128 #include <errno.h> 129 #include <fcntl.h> 130 #if defined(__OpenBSD__) || defined(__NetBSD__) 131 #include <math.h> 132 #endif 133 #include <signal.h> 134 #include <stdio.h> 135 #include <stdlib.h> 136 #include <string.h> 137 #include <unistd.h> 138 139 #ifdef IPSEC 140 #include <netinet6/ah.h> 141 #include <netinet6/ipsec.h> 142 #endif 143 144 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) 145 #include <md5.h> 146 #else 147 #include "md5.h" 148 #endif 149 150 #define MAXPACKETLEN 131072 151 #define IP6LEN 40 152 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 153 #define ICMP6ECHOTMLEN sizeof(struct timeval) 154 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 155 /* FQDN case, 64 bits of nonce + 32 bits ttl */ 156 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 157 #define EXTRA 256 /* for AH and various other headers. weird. */ 158 #define DEFDATALEN ICMP6ECHOTMLEN 159 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 160 #define NROUTES 9 /* number of record route slots */ 161 162 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 163 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 164 #define SET(bit) (A(bit) |= B(bit)) 165 #define CLR(bit) (A(bit) &= (~B(bit))) 166 #define TST(bit) (A(bit) & B(bit)) 167 168 #define F_FLOOD 0x0001 169 #define F_INTERVAL 0x0002 170 #define F_PINGFILLED 0x0008 171 #define F_QUIET 0x0010 172 #define F_RROUTE 0x0020 173 #define F_SO_DEBUG 0x0040 174 #define F_VERBOSE 0x0100 175 #ifdef IPSEC 176 #ifdef IPSEC_POLICY_IPSEC 177 #define F_POLICY 0x0400 178 #else 179 #define F_AUTHHDR 0x0200 180 #define F_ENCRYPT 0x0400 181 #endif /*IPSEC_POLICY_IPSEC*/ 182 #endif /*IPSEC*/ 183 #define F_NODEADDR 0x0800 184 #define F_FQDN 0x1000 185 #define F_INTERFACE 0x2000 186 #define F_SRCADDR 0x4000 187 #ifdef IPV6_REACHCONF 188 #define F_REACHCONF 0x8000 189 #endif 190 #define F_HOSTNAME 0x10000 191 #define F_FQDNOLD 0x20000 192 #define F_NIGROUP 0x40000 193 #define F_SUPTYPES 0x80000 194 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 195 u_int options; 196 197 #define IN6LEN sizeof(struct in6_addr) 198 #define SA6LEN sizeof(struct sockaddr_in6) 199 #define DUMMY_PORT 10101 200 201 #define SIN6(s) ((struct sockaddr_in6 *)(s)) 202 203 /* 204 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 205 * number of received sequence numbers we can keep track of. Change 128 206 * to 8192 for complete accuracy... 207 */ 208 #define MAX_DUP_CHK (8 * 8192) 209 int mx_dup_ck = MAX_DUP_CHK; 210 char rcvd_tbl[MAX_DUP_CHK / 8]; 211 212 struct addrinfo *res; 213 struct sockaddr_in6 dst; /* who to ping6 */ 214 struct sockaddr_in6 src; /* src addr of this packet */ 215 int datalen = DEFDATALEN; 216 int s; /* socket file descriptor */ 217 u_char outpack[MAXPACKETLEN]; 218 char BSPACE = '\b'; /* characters written for flood */ 219 char DOT = '.'; 220 char *hostname; 221 int ident; /* process id to identify our packets */ 222 u_int8_t nonce[8]; /* nonce field for node information */ 223 struct in6_addr srcaddr; 224 int hoplimit = -1; /* hoplimit */ 225 226 /* counters */ 227 long npackets; /* max packets to transmit */ 228 long nreceived; /* # of packets we got back */ 229 long nrepeats; /* number of duplicates */ 230 long ntransmitted; /* sequence # for outbound packets = #sent */ 231 struct timeval interval = {1, 0}; /* interval between packets */ 232 233 /* timing */ 234 int timing; /* flag to do timing */ 235 double tmin = 999999999.0; /* minimum round trip time */ 236 double tmax = 0.0; /* maximum round trip time */ 237 double tsum = 0.0; /* sum of all times, for doing average */ 238 #if defined(__OpenBSD__) || defined(__NetBSD__) 239 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 240 #endif 241 242 /* for node addresses */ 243 u_short naflags; 244 245 /* for ancillary data(advanced API) */ 246 struct msghdr smsghdr; 247 struct iovec smsgiov; 248 char *scmsg = 0; 249 250 volatile int signo; 251 volatile sig_atomic_t seenalrm; 252 volatile sig_atomic_t seenint; 253 #ifdef SIGINFO 254 volatile sig_atomic_t seeninfo; 255 #endif 256 257 int main __P((int, char *[])); 258 void fill __P((char *, char *)); 259 int get_hoplim __P((struct msghdr *)); 260 struct in6_pktinfo *get_rcvpktinfo __P((struct msghdr *)); 261 void onsignal __P((int)); 262 void retransmit __P((void)); 263 void onint __P((int)); 264 void pinger __P((void)); 265 const char *pr_addr __P((struct sockaddr *, int)); 266 void pr_icmph __P((struct icmp6_hdr *, u_char *)); 267 void pr_iph __P((struct ip6_hdr *)); 268 void pr_suptypes __P((struct icmp6_nodeinfo *, size_t)); 269 void pr_nodeaddr __P((struct icmp6_nodeinfo *, int)); 270 int myechoreply __P((const struct icmp6_hdr *)); 271 int mynireply __P((const struct icmp6_nodeinfo *)); 272 char *dnsdecode __P((const u_char **, const u_char *, const u_char *, 273 u_char *, size_t)); 274 void pr_pack __P((u_char *, int, struct msghdr *)); 275 void pr_exthdrs __P((struct msghdr *)); 276 void pr_ip6opt __P((void *)); 277 void pr_rthdr __P((void *)); 278 int pr_bitrange __P((u_int32_t, int, int)); 279 void pr_retip __P((struct ip6_hdr *, u_char *)); 280 void summary __P((void)); 281 void tvsub __P((struct timeval *, struct timeval *)); 282 int setpolicy __P((int, char *)); 283 char *nigroup __P((char *)); 284 void usage __P((void)); 285 286 int 287 main(argc, argv) 288 int argc; 289 char *argv[]; 290 { 291 struct itimerval itimer; 292 struct sockaddr_in6 from; 293 struct timeval timeout, *tv; 294 struct addrinfo hints; 295 fd_set *fdmaskp; 296 int fdmasks; 297 register int cc, i; 298 int ch, fromlen, hold, packlen, preload, optval, ret_ga; 299 u_char *datap, *packet; 300 char *e, *target, *ifname = NULL; 301 int ip6optlen = 0; 302 struct cmsghdr *scmsgp = NULL; 303 int sockbufsize = 0; 304 int usepktinfo = 0; 305 struct in6_pktinfo *pktinfo = NULL; 306 #ifdef USE_RFC2292BIS 307 struct ip6_rthdr *rthdr = NULL; 308 #endif 309 #ifdef IPSEC_POLICY_IPSEC 310 char *policy_in = NULL; 311 char *policy_out = NULL; 312 #endif 313 double intval; 314 size_t rthlen; 315 316 /* just to be sure */ 317 memset(&smsghdr, 0, sizeof(&smsghdr)); 318 memset(&smsgiov, 0, sizeof(&smsgiov)); 319 320 preload = 0; 321 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 322 #ifndef IPSEC 323 #define ADDOPTS 324 #else 325 #ifdef IPSEC_POLICY_IPSEC 326 #define ADDOPTS "P:" 327 #else 328 #define ADDOPTS "AE" 329 #endif /*IPSEC_POLICY_IPSEC*/ 330 #endif 331 while ((ch = getopt(argc, argv, 332 "a:b:c:dfHh:I:i:l:nNp:qRS:s:tvwW" ADDOPTS)) != -1) { 333 #undef ADDOPTS 334 switch (ch) { 335 case 'a': 336 { 337 char *cp; 338 339 options &= ~F_NOUSERDATA; 340 options |= F_NODEADDR; 341 for (cp = optarg; *cp != '\0'; cp++) { 342 switch (*cp) { 343 case 'a': 344 naflags |= NI_NODEADDR_FLAG_ALL; 345 break; 346 case 'c': 347 case 'C': 348 naflags |= NI_NODEADDR_FLAG_COMPAT; 349 break; 350 case 'l': 351 case 'L': 352 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 353 break; 354 case 's': 355 case 'S': 356 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 357 break; 358 case 'g': 359 case 'G': 360 naflags |= NI_NODEADDR_FLAG_GLOBAL; 361 break; 362 case 'A': /* experimental. not in the spec */ 363 #ifdef NI_NODEADDR_FLAG_ANYCAST 364 naflags |= NI_NODEADDR_FLAG_ANYCAST; 365 break; 366 #else 367 errx(1, 368 "-a A is not supported on the platform"); 369 /*NOTREACHED*/ 370 #endif 371 default: 372 usage(); 373 /*NOTREACHED*/ 374 } 375 } 376 break; 377 } 378 case 'b': 379 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 380 sockbufsize = atoi(optarg); 381 #else 382 err(1, 383 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 384 #endif 385 break; 386 case 'c': 387 npackets = strtol(optarg, &e, 10); 388 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 389 errx(1, 390 "illegal number of packets -- %s", optarg); 391 break; 392 case 'd': 393 options |= F_SO_DEBUG; 394 break; 395 case 'f': 396 if (getuid()) { 397 errno = EPERM; 398 errx(1, "Must be superuser to flood ping"); 399 } 400 options |= F_FLOOD; 401 setbuf(stdout, (char *)NULL); 402 break; 403 case 'H': 404 options |= F_HOSTNAME; 405 break; 406 case 'h': /* hoplimit */ 407 hoplimit = strtol(optarg, &e, 10); 408 if (255 < hoplimit || hoplimit < -1) 409 errx(1, 410 "illegal hoplimit -- %s", optarg); 411 break; 412 case 'I': 413 ifname = optarg; 414 options |= F_INTERFACE; 415 #ifndef USE_SIN6_SCOPE_ID 416 usepktinfo++; 417 #endif 418 break; 419 case 'i': /* wait between sending packets */ 420 intval = strtod(optarg, &e); 421 if (*optarg == '\0' || *e != '\0') 422 errx(1, "illegal timing interval %s", optarg); 423 if (intval < 1 && getuid()) { 424 errx(1, "%s: only root may use interval < 1s", 425 strerror(EPERM)); 426 } 427 interval.tv_sec = (long)intval; 428 interval.tv_usec = 429 (long)((intval - interval.tv_sec) * 1000000); 430 if (interval.tv_sec < 0) 431 errx(1, "illegal timing interval %s", optarg); 432 /* less than 1/hz does not make sense */ 433 if (interval.tv_sec == 0 && interval.tv_usec < 10000) { 434 warnx("too small interval, raised to 0.01"); 435 interval.tv_usec = 10000; 436 } 437 options |= F_INTERVAL; 438 break; 439 case 'l': 440 if (getuid()) { 441 errno = EPERM; 442 errx(1, "Must be superuser to preload"); 443 } 444 preload = strtol(optarg, &e, 10); 445 if (preload < 0 || *optarg == '\0' || *e != '\0') 446 errx(1, "illegal preload value -- %s", optarg); 447 break; 448 case 'N': 449 options |= F_NIGROUP; 450 break; 451 case 'p': /* fill buffer with user pattern */ 452 options |= F_PINGFILLED; 453 fill((char *)datap, optarg); 454 break; 455 case 'q': 456 options |= F_QUIET; 457 break; 458 case 'R': 459 #ifdef IPV6_REACHCONF 460 options |= F_REACHCONF; 461 break; 462 #else 463 errx(1, "-R is not supported in this configuration"); 464 #endif 465 case 'S': 466 /* XXX: use getaddrinfo? */ 467 if (inet_pton(AF_INET6, optarg, (void *)&srcaddr) != 1) 468 errx(1, "invalid IPv6 address: %s", optarg); 469 options |= F_SRCADDR; 470 usepktinfo++; 471 break; 472 case 's': /* size of packet to send */ 473 datalen = strtol(optarg, &e, 10); 474 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 475 errx(1, "illegal datalen value -- %s", optarg); 476 if (datalen > MAXDATALEN) { 477 errx(1, 478 "datalen value too large, maximum is %d", 479 MAXDATALEN); 480 } 481 break; 482 case 't': 483 options &= ~F_NOUSERDATA; 484 options |= F_SUPTYPES; 485 break; 486 case 'v': 487 options |= F_VERBOSE; 488 break; 489 case 'w': 490 options &= ~F_NOUSERDATA; 491 options |= F_FQDN; 492 break; 493 case 'W': 494 options &= ~F_NOUSERDATA; 495 options |= F_FQDNOLD; 496 break; 497 #ifdef IPSEC 498 #ifdef IPSEC_POLICY_IPSEC 499 case 'P': 500 options |= F_POLICY; 501 if (!strncmp("in", optarg, 2)) { 502 if ((policy_in = strdup(optarg)) == NULL) 503 errx(1, "strdup"); 504 } else if (!strncmp("out", optarg, 3)) { 505 if ((policy_out = strdup(optarg)) == NULL) 506 errx(1, "strdup"); 507 } else 508 errx(1, "invalid security policy"); 509 break; 510 #else 511 case 'A': 512 options |= F_AUTHHDR; 513 break; 514 case 'E': 515 options |= F_ENCRYPT; 516 break; 517 #endif /*IPSEC_POLICY_IPSEC*/ 518 #endif /*IPSEC*/ 519 default: 520 usage(); 521 /*NOTREACHED*/ 522 } 523 } 524 argc -= optind; 525 argv += optind; 526 527 if (argc < 1) { 528 usage(); 529 /*NOTREACHED*/ 530 } 531 532 if (argc > 1) { 533 #ifdef IPV6_RECVRTHDR /* 2292bis */ 534 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 535 argc - 1)); 536 #else /* RFC2292 */ 537 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 538 #endif 539 if (rthlen == 0) { 540 errx(1, "too many intermediate hops"); 541 /*NOTREACHED*/ 542 } 543 ip6optlen += rthlen; 544 } 545 546 if (options & F_NIGROUP) { 547 target = nigroup(argv[argc - 1]); 548 if (target == NULL) { 549 usage(); 550 /*NOTREACHED*/ 551 } 552 } else 553 target = argv[argc - 1]; 554 555 /* getaddrinfo */ 556 bzero(&hints, sizeof(struct addrinfo)); 557 hints.ai_flags = AI_CANONNAME; 558 hints.ai_family = AF_INET6; 559 hints.ai_socktype = SOCK_RAW; 560 hints.ai_protocol = IPPROTO_ICMPV6; 561 562 ret_ga = getaddrinfo(target, NULL, &hints, &res); 563 if (ret_ga) { 564 fprintf(stderr, "ping6: %s\n", gai_strerror(ret_ga)); 565 exit(1); 566 } 567 if (res->ai_canonname) 568 hostname = res->ai_canonname; 569 else 570 hostname = target; 571 572 if (!res->ai_addr) 573 errx(1, "getaddrinfo failed"); 574 575 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 576 577 if ((s = socket(res->ai_family, res->ai_socktype, 578 res->ai_protocol)) < 0) 579 err(1, "socket"); 580 581 /* 582 * let the kerel pass extension headers of incoming packets, 583 * for privileged socket options 584 */ 585 if ((options & F_VERBOSE) != 0) { 586 int opton = 1; 587 588 #ifdef IPV6_RECVHOPOPTS 589 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 590 sizeof(opton))) 591 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 592 #else /* old adv. API */ 593 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 594 sizeof(opton))) 595 err(1, "setsockopt(IPV6_HOPOPTS)"); 596 #endif 597 #ifdef IPV6_RECVDSTOPTS 598 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 599 sizeof(opton))) 600 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 601 #else /* old adv. API */ 602 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 603 sizeof(opton))) 604 err(1, "setsockopt(IPV6_DSTOPTS)"); 605 #endif 606 #ifdef IPV6_RECVRTHDRDSTOPTS 607 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 608 sizeof(opton))) 609 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 610 #endif 611 } 612 613 /* revoke root privilege */ 614 seteuid(getuid()); 615 setuid(getuid()); 616 617 if (options & F_FLOOD && options & F_INTERVAL) 618 errx(1, "-f and -i incompatible options"); 619 620 if ((options & F_NOUSERDATA) == 0) { 621 if (datalen >= sizeof(struct timeval)) { 622 /* we can time transfer */ 623 timing = 1; 624 } else 625 timing = 0; 626 } else { 627 /* suppress timing for node information query */ 628 timing = 0; 629 datalen = 2048; 630 } 631 632 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 633 if (!(packet = (u_char *)malloc((u_int)packlen))) 634 err(1, "Unable to allocate packet"); 635 if (!(options & F_PINGFILLED)) 636 for (i = ICMP6ECHOLEN; i < packlen; ++i) 637 *datap++ = i; 638 639 ident = getpid() & 0xFFFF; 640 #ifndef __OpenBSD__ 641 gettimeofday(&timeout, NULL); 642 srand((unsigned int)(timeout.tv_sec ^ timeout.tv_usec ^ (long)ident)); 643 memset(nonce, 0, sizeof(nonce)); 644 for (i = 0; i < sizeof(nonce); i += sizeof(int)) 645 *((int *)&nonce[i]) = rand(); 646 #else 647 memset(nonce, 0, sizeof(nonce)); 648 for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t)) 649 *((u_int32_t *)&nonce[i]) = arc4random(); 650 #endif 651 652 hold = 1; 653 654 if (options & F_SO_DEBUG) 655 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 656 sizeof(hold)); 657 optval = IPV6_DEFHLIM; 658 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 659 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 660 &optval, sizeof(optval)) == -1) 661 err(1, "IPV6_MULTICAST_HOPS"); 662 #ifdef IPV6_USE_MIN_MTU 663 if ((options & F_NOMINMTU) == 0) { 664 optval = 1; 665 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 666 &optval, sizeof(optval)) == -1) 667 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 668 } 669 #ifdef IPV6_RECVPATHMTU 670 else { 671 optval = 1; 672 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, 673 &optval, sizeof(optval)) == -1) 674 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 675 } 676 #endif /* IPV6_RECVPATHMTU */ 677 #endif /* IPV6_USE_MIN_MTU */ 678 679 #ifdef IPSEC 680 #ifdef IPSEC_POLICY_IPSEC 681 if (options & F_POLICY) { 682 if (setpolicy(s, policy_in) < 0) 683 errx(1, "%s", ipsec_strerror()); 684 if (setpolicy(s, policy_out) < 0) 685 errx(1, "%s", ipsec_strerror()); 686 } 687 #else 688 if (options & F_AUTHHDR) { 689 optval = IPSEC_LEVEL_REQUIRE; 690 #ifdef IPV6_AUTH_TRANS_LEVEL 691 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 692 &optval, sizeof(optval)) == -1) 693 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 694 #else /* old def */ 695 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 696 &optval, sizeof(optval)) == -1) 697 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 698 #endif 699 } 700 if (options & F_ENCRYPT) { 701 optval = IPSEC_LEVEL_REQUIRE; 702 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 703 &optval, sizeof(optval)) == -1) 704 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 705 } 706 #endif /*IPSEC_POLICY_IPSEC*/ 707 #endif 708 709 #ifdef ICMP6_FILTER 710 { 711 struct icmp6_filter filt; 712 if (!(options & F_VERBOSE)) { 713 ICMP6_FILTER_SETBLOCKALL(&filt); 714 if ((options & F_FQDN) || (options & F_FQDNOLD) || 715 (options & F_NODEADDR) || (options & F_SUPTYPES)) 716 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 717 else 718 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 719 } else { 720 ICMP6_FILTER_SETPASSALL(&filt); 721 } 722 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 723 sizeof(filt)) < 0) 724 err(1, "setsockopt(ICMP6_FILTER)"); 725 } 726 #endif /*ICMP6_FILTER*/ 727 728 /* let the kerel pass extension headers of incoming packets */ 729 if ((options & F_VERBOSE) != 0) { 730 int opton = 1; 731 732 #ifdef IPV6_RECVRTHDR 733 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 734 sizeof(opton))) 735 err(1, "setsockopt(IPV6_RECVRTHDR)"); 736 #else /* old adv. API */ 737 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton, 738 sizeof(opton))) 739 err(1, "setsockopt(IPV6_RTHDR)"); 740 #endif 741 } 742 743 /* 744 optval = 1; 745 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 746 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 747 &optval, sizeof(optval)) == -1) 748 err(1, "IPV6_MULTICAST_LOOP"); 749 */ 750 751 /* Specify the outgoing interface and/or the source address */ 752 if (usepktinfo) 753 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 754 755 if (hoplimit != -1) 756 ip6optlen += CMSG_SPACE(sizeof(int)); 757 758 #ifdef IPV6_REACHCONF 759 if (options & F_REACHCONF) 760 ip6optlen += CMSG_SPACE(0); 761 #endif 762 763 /* set IP6 packet options */ 764 if (ip6optlen) { 765 if ((scmsg = (char *)malloc(ip6optlen)) == 0) 766 errx(1, "can't allocate enough memory"); 767 smsghdr.msg_control = (caddr_t)scmsg; 768 smsghdr.msg_controllen = ip6optlen; 769 scmsgp = (struct cmsghdr *)scmsg; 770 } 771 if (usepktinfo) { 772 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); 773 memset(pktinfo, 0, sizeof(*pktinfo)); 774 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 775 scmsgp->cmsg_level = IPPROTO_IPV6; 776 scmsgp->cmsg_type = IPV6_PKTINFO; 777 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 778 } 779 780 /* set the outgoing interface */ 781 if (ifname) { 782 #ifndef USE_SIN6_SCOPE_ID 783 /* pktinfo must have already been allocated */ 784 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0) 785 errx(1, "%s: invalid interface name", ifname); 786 #else 787 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 788 errx(1, "%s: invalid interface name", ifname); 789 #endif 790 } 791 /* set the source address */ 792 if (options & F_SRCADDR)/* pktinfo must be valid */ 793 pktinfo->ipi6_addr = srcaddr; 794 795 if (hoplimit != -1) { 796 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 797 scmsgp->cmsg_level = IPPROTO_IPV6; 798 scmsgp->cmsg_type = IPV6_HOPLIMIT; 799 *(int *)(CMSG_DATA(scmsgp)) = hoplimit; 800 801 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 802 } 803 #ifdef IPV6_REACHCONF 804 if (options & F_REACHCONF) { 805 scmsgp->cmsg_len = CMSG_LEN(0); 806 scmsgp->cmsg_level = IPPROTO_IPV6; 807 scmsgp->cmsg_type = IPV6_REACHCONF; 808 809 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 810 } 811 #endif 812 813 if (argc > 1) { /* some intermediate addrs are specified */ 814 int hops, error; 815 #ifdef USE_RFC2292BIS 816 int rthdrlen; 817 #endif 818 819 #ifdef USE_RFC2292BIS 820 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 821 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 822 scmsgp->cmsg_level = IPPROTO_IPV6; 823 scmsgp->cmsg_type = IPV6_RTHDR; 824 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 825 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 826 IPV6_RTHDR_TYPE_0, argc - 1); 827 if (rthdr == NULL) 828 errx(1, "can't initialize rthdr"); 829 #else /* old advanced API */ 830 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp, 831 IPV6_RTHDR_TYPE_0)) == 0) 832 errx(1, "can't initialize rthdr"); 833 #endif /* USE_RFC2292BIS */ 834 835 for (hops = 0; hops < argc - 1; hops++) { 836 struct addrinfo *iaip; 837 838 if ((error = getaddrinfo(argv[hops], NULL, &hints, 839 &iaip))) 840 errx(1, "%s", gai_strerror(error)); 841 if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6) 842 errx(1, 843 "bad addr family of an intermediate addr"); 844 845 #ifdef USE_RFC2292BIS 846 if (inet6_rth_add(rthdr, 847 &(SIN6(iaip->ai_addr))->sin6_addr)) 848 errx(1, "can't add an intermediate node"); 849 #else /* old advanced API */ 850 if (inet6_rthdr_add(scmsgp, 851 &(SIN6(iaip->ai_addr))->sin6_addr, 852 IPV6_RTHDR_LOOSE)) 853 errx(1, "can't add an intermediate node"); 854 #endif /* USE_RFC2292BIS */ 855 freeaddrinfo(iaip); 856 } 857 858 #ifndef USE_RFC2292BIS 859 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE)) 860 errx(1, "can't set the last flag"); 861 #endif 862 863 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 864 } 865 866 { 867 /* 868 * source selection 869 */ 870 int dummy, len = sizeof(src); 871 872 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 873 err(1, "UDP socket"); 874 875 src.sin6_family = AF_INET6; 876 src.sin6_addr = dst.sin6_addr; 877 src.sin6_port = ntohs(DUMMY_PORT); 878 src.sin6_scope_id = dst.sin6_scope_id; 879 880 #ifdef USE_RFC2292BIS 881 if (pktinfo && 882 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 883 (void *)pktinfo, sizeof(*pktinfo))) 884 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 885 886 if (hoplimit != -1 && 887 setsockopt(dummy, IPPROTO_IPV6, IPV6_HOPLIMIT, 888 (void *)&hoplimit, sizeof(hoplimit))) 889 err(1, "UDP setsockopt(IPV6_HOPLIMIT)"); 890 891 if (rthdr && 892 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 893 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 894 err(1, "UDP setsockopt(IPV6_RTHDR)"); 895 #else /* old advanced API */ 896 if (smsghdr.msg_control && 897 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS, 898 (void *)smsghdr.msg_control, smsghdr.msg_controllen)) 899 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)"); 900 #endif 901 902 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 903 err(1, "UDP connect"); 904 905 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 906 err(1, "getsockname"); 907 908 close(dummy); 909 } 910 911 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 912 if (sockbufsize) { 913 if (datalen > sockbufsize) 914 warnx("you need -b to increase socket buffer size"); 915 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 916 sizeof(sockbufsize)) < 0) 917 err(1, "setsockopt(SO_SNDBUF)"); 918 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 919 sizeof(sockbufsize)) < 0) 920 err(1, "setsockopt(SO_RCVBUF)"); 921 } 922 else { 923 if (datalen > 8 * 1024) /*XXX*/ 924 warnx("you need -b to increase socket buffer size"); 925 /* 926 * When pinging the broadcast address, you can get a lot of 927 * answers. Doing something so evil is useful if you are trying 928 * to stress the ethernet, or just want to fill the arp cache 929 * to get some stuff for /etc/ethers. 930 */ 931 hold = 48 * 1024; 932 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 933 sizeof(hold)); 934 } 935 #endif 936 937 optval = 1; 938 #ifndef USE_SIN6_SCOPE_ID 939 #ifdef IPV6_RECVPKTINFO 940 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 941 sizeof(optval)) < 0) 942 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 943 #else /* old adv. API */ 944 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 945 sizeof(optval)) < 0) 946 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 947 #endif 948 #endif /* USE_SIN6_SCOPE_ID */ 949 #ifdef IPV6_RECVHOPLIMIT 950 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 951 sizeof(optval)) < 0) 952 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 953 #else /* old adv. API */ 954 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 955 sizeof(optval)) < 0) 956 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 957 #endif 958 959 printf("PING6(%d=40+8+%d bytes) ", datalen + 48, datalen); 960 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 961 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 962 963 while (preload--) /* Fire off them quickies. */ 964 pinger(); 965 966 (void)signal(SIGINT, onsignal); 967 #ifdef SIGINFO 968 (void)signal(SIGINFO, onsignal); 969 #endif 970 971 if ((options & F_FLOOD) == 0) { 972 (void)signal(SIGALRM, onsignal); 973 itimer.it_interval = interval; 974 itimer.it_value = interval; 975 (void)setitimer(ITIMER_REAL, &itimer, NULL); 976 retransmit(); 977 } 978 979 fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask); 980 if ((fdmaskp = malloc(fdmasks)) == NULL) 981 err(1, "malloc"); 982 983 signo = seenalrm = seenint = 0; 984 #ifdef SIGINFO 985 seeninfo = 0; 986 #endif 987 988 for (;;) { 989 struct msghdr m; 990 struct cmsghdr *cm; 991 u_char buf[1024]; 992 struct iovec iov[2]; 993 994 /* signal handling */ 995 if (seenalrm) { 996 retransmit(); 997 seenalrm = 0; 998 continue; 999 } 1000 if (seenint) { 1001 onint(SIGINT); 1002 seenint = 0; 1003 continue; 1004 } 1005 #ifdef SIGINFO 1006 if (seeninfo) { 1007 summary(); 1008 seeninfo = 0; 1009 continue; 1010 } 1011 #endif 1012 1013 if (options & F_FLOOD) { 1014 pinger(); 1015 timeout.tv_sec = 0; 1016 timeout.tv_usec = 10000; 1017 tv = &timeout; 1018 } else 1019 tv = NULL; 1020 memset(fdmaskp, 0, fdmasks); 1021 FD_SET(s, fdmaskp); 1022 cc = select(s + 1, fdmaskp, NULL, NULL, tv); 1023 if (cc < 0) { 1024 if (errno != EINTR) { 1025 warn("select"); 1026 sleep(1); 1027 } 1028 continue; 1029 } else if (cc == 0) 1030 continue; 1031 1032 fromlen = sizeof(from); 1033 m.msg_name = (caddr_t)&from; 1034 m.msg_namelen = sizeof(from); 1035 memset(&iov, 0, sizeof(iov)); 1036 iov[0].iov_base = (caddr_t)packet; 1037 iov[0].iov_len = packlen; 1038 m.msg_iov = iov; 1039 m.msg_iovlen = 1; 1040 cm = (struct cmsghdr *)buf; 1041 m.msg_control = (caddr_t)buf; 1042 m.msg_controllen = sizeof(buf); 1043 1044 cc = recvmsg(s, &m, 0); 1045 if (cc < 0) { 1046 if (errno != EINTR) { 1047 warn("recvmsg"); 1048 sleep(1); 1049 } 1050 continue; 1051 } else { 1052 /* 1053 * an ICMPv6 message (probably an echoreply) arrived. 1054 */ 1055 pr_pack(packet, cc, &m); 1056 } 1057 if (npackets && nreceived >= npackets) 1058 break; 1059 } 1060 summary(); 1061 exit(nreceived == 0); 1062 } 1063 1064 void 1065 onsignal(sig) 1066 int sig; 1067 { 1068 signo = sig; 1069 switch (sig) { 1070 case SIGALRM: 1071 seenalrm++; 1072 break; 1073 case SIGINT: 1074 seenint++; 1075 break; 1076 #ifdef SIGINFO 1077 case SIGINFO: 1078 seeninfo++; 1079 break; 1080 #endif 1081 } 1082 } 1083 1084 /* 1085 * retransmit -- 1086 * This routine transmits another ping6. 1087 */ 1088 void 1089 retransmit() 1090 { 1091 struct itimerval itimer; 1092 1093 if (!npackets || ntransmitted < npackets) { 1094 pinger(); 1095 return; 1096 } 1097 1098 /* 1099 * If we're not transmitting any more packets, change the timer 1100 * to wait two round-trip times if we've received any packets or 1101 * ten seconds if we haven't. 1102 */ 1103 #define MAXWAIT 10 1104 if (nreceived) { 1105 itimer.it_value.tv_sec = 2 * tmax / 1000; 1106 if (itimer.it_value.tv_sec == 0) 1107 itimer.it_value.tv_sec = 1; 1108 } else 1109 itimer.it_value.tv_sec = MAXWAIT; 1110 itimer.it_interval.tv_sec = 0; 1111 itimer.it_interval.tv_usec = 0; 1112 itimer.it_value.tv_usec = 0; 1113 1114 (void)signal(SIGALRM, onint); 1115 (void)setitimer(ITIMER_REAL, &itimer, NULL); 1116 } 1117 1118 /* 1119 * pinger -- 1120 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1121 * will be added on by the kernel. The ID field is our UNIX process ID, 1122 * and the sequence number is an ascending integer. The first 8 bytes 1123 * of the data portion are used to hold a UNIX "timeval" struct in VAX 1124 * byte-order, to compute the round-trip time. 1125 */ 1126 void 1127 pinger() 1128 { 1129 struct icmp6_hdr *icp; 1130 struct iovec iov[2]; 1131 int i, cc; 1132 struct icmp6_nodeinfo *nip; 1133 int seq; 1134 1135 icp = (struct icmp6_hdr *)outpack; 1136 nip = (struct icmp6_nodeinfo *)outpack; 1137 memset(icp, 0, sizeof(*icp)); 1138 icp->icmp6_cksum = 0; 1139 seq = ntransmitted++; 1140 CLR(seq % mx_dup_ck); 1141 1142 if (options & F_FQDN) { 1143 icp->icmp6_type = ICMP6_NI_QUERY; 1144 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1145 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1146 nip->ni_flags = htons(0); 1147 1148 memcpy(nip->icmp6_ni_nonce, nonce, 1149 sizeof(nip->icmp6_ni_nonce)); 1150 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1151 1152 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1153 sizeof(dst.sin6_addr)); 1154 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1155 datalen = 0; 1156 } else if (options & F_FQDNOLD) { 1157 /* packet format in 03 draft - no Subject data on queries */ 1158 icp->icmp6_type = ICMP6_NI_QUERY; 1159 icp->icmp6_code = 0; /* code field is always 0 */ 1160 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1161 nip->ni_flags = htons(0); 1162 1163 memcpy(nip->icmp6_ni_nonce, nonce, 1164 sizeof(nip->icmp6_ni_nonce)); 1165 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1166 1167 cc = ICMP6_NIQLEN; 1168 datalen = 0; 1169 } else if (options & F_NODEADDR) { 1170 icp->icmp6_type = ICMP6_NI_QUERY; 1171 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1172 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1173 nip->ni_flags = naflags; 1174 1175 memcpy(nip->icmp6_ni_nonce, nonce, 1176 sizeof(nip->icmp6_ni_nonce)); 1177 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1178 1179 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1180 sizeof(dst.sin6_addr)); 1181 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1182 datalen = 0; 1183 } else if (options & F_SUPTYPES) { 1184 icp->icmp6_type = ICMP6_NI_QUERY; 1185 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1186 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1187 /* we support compressed bitmap */ 1188 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1189 1190 memcpy(nip->icmp6_ni_nonce, nonce, 1191 sizeof(nip->icmp6_ni_nonce)); 1192 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1193 cc = ICMP6_NIQLEN; 1194 datalen = 0; 1195 } else { 1196 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1197 icp->icmp6_code = 0; 1198 icp->icmp6_id = htons(ident); 1199 icp->icmp6_seq = ntohs(seq); 1200 if (timing) 1201 (void)gettimeofday((struct timeval *) 1202 &outpack[ICMP6ECHOLEN], NULL); 1203 cc = ICMP6ECHOLEN + datalen; 1204 } 1205 1206 smsghdr.msg_name = (caddr_t)&dst; 1207 smsghdr.msg_namelen = sizeof(dst); 1208 memset(&iov, 0, sizeof(iov)); 1209 iov[0].iov_base = (caddr_t)outpack; 1210 iov[0].iov_len = cc; 1211 smsghdr.msg_iov = iov; 1212 smsghdr.msg_iovlen = 1; 1213 1214 i = sendmsg(s, &smsghdr, 0); 1215 1216 if (i < 0 || i != cc) { 1217 if (i < 0) 1218 warn("sendmsg"); 1219 (void)printf("ping6: wrote %s %d chars, ret=%d\n", 1220 hostname, cc, i); 1221 } 1222 if (!(options & F_QUIET) && options & F_FLOOD) 1223 (void)write(STDOUT_FILENO, &DOT, 1); 1224 } 1225 1226 int 1227 myechoreply(icp) 1228 const struct icmp6_hdr *icp; 1229 { 1230 if (ntohs(icp->icmp6_id) == ident) 1231 return 1; 1232 else 1233 return 0; 1234 } 1235 1236 int 1237 mynireply(nip) 1238 const struct icmp6_nodeinfo *nip; 1239 { 1240 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1241 nonce + sizeof(u_int16_t), 1242 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1243 return 1; 1244 else 1245 return 0; 1246 } 1247 1248 char * 1249 dnsdecode(sp, ep, base, buf, bufsiz) 1250 const u_char **sp; 1251 const u_char *ep; 1252 const u_char *base; /*base for compressed name*/ 1253 u_char *buf; 1254 size_t bufsiz; 1255 { 1256 int i; 1257 const u_char *cp; 1258 char cresult[MAXDNAME + 1]; 1259 const u_char *comp; 1260 int l; 1261 1262 cp = *sp; 1263 *buf = '\0'; 1264 1265 if (cp >= ep) 1266 return NULL; 1267 while (cp < ep) { 1268 i = *cp; 1269 if (i == 0 || cp != *sp) { 1270 if (strlcat(buf, ".", bufsiz) >= bufsiz) 1271 return NULL; /*result overrun*/ 1272 } 1273 if (i == 0) 1274 break; 1275 cp++; 1276 1277 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1278 /* DNS compression */ 1279 if (!base) 1280 return NULL; 1281 1282 comp = base + (i & 0x3f); 1283 if (dnsdecode(&comp, cp, base, cresult, 1284 sizeof(cresult)) == NULL) 1285 return NULL; 1286 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1287 return NULL; /*result overrun*/ 1288 break; 1289 } else if ((i & 0x3f) == i) { 1290 if (i > ep - cp) 1291 return NULL; /*source overrun*/ 1292 while (i-- > 0 && cp < ep) { 1293 l = snprintf(cresult, sizeof(cresult), 1294 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1295 if (l >= sizeof(cresult)) 1296 return NULL; 1297 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1298 return NULL; /*result overrun*/ 1299 cp++; 1300 } 1301 } else 1302 return NULL; /*invalid label*/ 1303 } 1304 if (i != 0) 1305 return NULL; /*not terminated*/ 1306 cp++; 1307 *sp = cp; 1308 return buf; 1309 } 1310 1311 /* 1312 * pr_pack -- 1313 * Print out the packet, if it came from us. This logic is necessary 1314 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1315 * which arrive ('tis only fair). This permits multiple copies of this 1316 * program to be run without having intermingled output (or statistics!). 1317 */ 1318 void 1319 pr_pack(buf, cc, mhdr) 1320 u_char *buf; 1321 int cc; 1322 struct msghdr *mhdr; 1323 { 1324 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1325 struct icmp6_hdr *icp; 1326 struct icmp6_nodeinfo *ni; 1327 int i; 1328 int hoplim; 1329 struct sockaddr *from; 1330 int fromlen; 1331 u_char *cp = NULL, *dp, *end = buf + cc; 1332 struct in6_pktinfo *pktinfo = NULL; 1333 struct timeval tv, *tp; 1334 double triptime = 0; 1335 int dupflag; 1336 size_t off; 1337 int oldfqdn; 1338 u_int16_t seq; 1339 char dnsname[MAXDNAME + 1]; 1340 1341 (void)gettimeofday(&tv, NULL); 1342 1343 if (!mhdr || !mhdr->msg_name || 1344 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1345 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1346 if (options & F_VERBOSE) 1347 warnx("invalid peername\n"); 1348 return; 1349 } 1350 from = (struct sockaddr *)mhdr->msg_name; 1351 fromlen = mhdr->msg_namelen; 1352 if (cc < sizeof(struct icmp6_hdr)) { 1353 if (options & F_VERBOSE) 1354 warnx("packet too short (%d bytes) from %s\n", cc, 1355 pr_addr(from, fromlen)); 1356 return; 1357 } 1358 icp = (struct icmp6_hdr *)buf; 1359 ni = (struct icmp6_nodeinfo *)buf; 1360 off = 0; 1361 1362 if ((hoplim = get_hoplim(mhdr)) == -1) { 1363 warnx("failed to get receiving hop limit"); 1364 return; 1365 } 1366 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1367 warnx("failed to get receiving pakcet information"); 1368 return; 1369 } 1370 1371 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1372 seq = ntohs(icp->icmp6_seq); 1373 ++nreceived; 1374 if (timing) { 1375 tp = (struct timeval *)(icp + 1); 1376 tvsub(&tv, tp); 1377 triptime = ((double)tv.tv_sec) * 1000.0 + 1378 ((double)tv.tv_usec) / 1000.0; 1379 tsum += triptime; 1380 #if defined(__OpenBSD__) || defined(__NetBSD__) 1381 tsumsq += triptime * triptime; 1382 #endif 1383 if (triptime < tmin) 1384 tmin = triptime; 1385 if (triptime > tmax) 1386 tmax = triptime; 1387 } 1388 1389 if (TST(seq % mx_dup_ck)) { 1390 ++nrepeats; 1391 --nreceived; 1392 dupflag = 1; 1393 } else { 1394 SET(seq % mx_dup_ck); 1395 dupflag = 0; 1396 } 1397 1398 if (options & F_QUIET) 1399 return; 1400 1401 if (options & F_FLOOD) 1402 (void)write(STDOUT_FILENO, &BSPACE, 1); 1403 else { 1404 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1405 pr_addr(from, fromlen), seq); 1406 (void)printf(" hlim=%d", hoplim); 1407 if ((options & F_VERBOSE) != 0) { 1408 struct sockaddr_in6 dstsa; 1409 1410 memset(&dstsa, 0, sizeof(dstsa)); 1411 dstsa.sin6_family = AF_INET6; 1412 #ifdef SIN6_LEN 1413 dstsa.sin6_len = sizeof(dstsa); 1414 #endif 1415 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1416 dstsa.sin6_addr = pktinfo->ipi6_addr; 1417 (void)printf(" dst=%s", 1418 pr_addr((struct sockaddr *)&dstsa, 1419 sizeof(dstsa))); 1420 } 1421 if (timing) 1422 (void)printf(" time=%g ms", triptime); 1423 if (dupflag) 1424 (void)printf("(DUP!)"); 1425 /* check the data */ 1426 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1427 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1428 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1429 if (*cp != *dp) { 1430 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1431 break; 1432 } 1433 } 1434 } 1435 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1436 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce); 1437 ++nreceived; 1438 if (TST(seq % mx_dup_ck)) { 1439 ++nrepeats; 1440 --nreceived; 1441 dupflag = 1; 1442 } else { 1443 SET(seq % mx_dup_ck); 1444 dupflag = 0; 1445 } 1446 1447 if (options & F_QUIET) 1448 return; 1449 1450 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1451 1452 switch (ntohs(ni->ni_code)) { 1453 case ICMP6_NI_SUCCESS: 1454 break; 1455 case ICMP6_NI_REFUSED: 1456 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1457 goto fqdnend; 1458 case ICMP6_NI_UNKNOWN: 1459 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1460 goto fqdnend; 1461 default: 1462 printf("unknown code 0x%x, type 0x%x", 1463 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1464 goto fqdnend; 1465 } 1466 1467 switch (ntohs(ni->ni_qtype)) { 1468 case NI_QTYPE_NOOP: 1469 printf("NodeInfo NOOP"); 1470 break; 1471 case NI_QTYPE_SUPTYPES: 1472 pr_suptypes(ni, end - (u_char *)ni); 1473 break; 1474 case NI_QTYPE_NODEADDR: 1475 pr_nodeaddr(ni, end - (u_char *)ni); 1476 break; 1477 case NI_QTYPE_FQDN: 1478 default: /* XXX: for backward compatibility */ 1479 cp = (u_char *)ni + ICMP6_NIRLEN; 1480 if (buf[off + ICMP6_NIRLEN] == 1481 cc - off - ICMP6_NIRLEN - 1) 1482 oldfqdn = 1; 1483 else 1484 oldfqdn = 0; 1485 if (oldfqdn) { 1486 cp++; /* skip length */ 1487 while (cp < end) { 1488 safeputc(*cp & 0xff); 1489 cp++; 1490 } 1491 } else { 1492 i = 0; 1493 while (cp < end) { 1494 if (dnsdecode((const u_char **)&cp, end, 1495 (const u_char *)(ni + 1), dnsname, 1496 sizeof(dnsname)) == NULL) { 1497 printf("???"); 1498 break; 1499 } 1500 /* 1501 * name-lookup special handling for 1502 * truncated name 1503 */ 1504 if (cp + 1 <= end && !*cp && 1505 strlen(dnsname) > 0) { 1506 dnsname[strlen(dnsname) - 1] = '\0'; 1507 cp++; 1508 } 1509 printf("%s%s", i > 0 ? "," : "", 1510 dnsname); 1511 } 1512 } 1513 if (options & F_VERBOSE) { 1514 int32_t ttl; 1515 int comma = 0; 1516 1517 (void)printf(" ("); /*)*/ 1518 1519 switch (ni->ni_code) { 1520 case ICMP6_NI_REFUSED: 1521 (void)printf("refused"); 1522 comma++; 1523 break; 1524 case ICMP6_NI_UNKNOWN: 1525 (void)printf("unknwon qtype"); 1526 comma++; 1527 break; 1528 } 1529 1530 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1531 /* case of refusion, unknown */ 1532 /*(*/ 1533 putchar(')'); 1534 goto fqdnend; 1535 } 1536 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]); 1537 if (comma) 1538 printf(","); 1539 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1540 (void)printf("TTL=%d:meaningless", 1541 (int)ttl); 1542 } else { 1543 if (ttl < 0) { 1544 (void)printf("TTL=%d:invalid", 1545 ttl); 1546 } else 1547 (void)printf("TTL=%d", ttl); 1548 } 1549 comma++; 1550 1551 if (oldfqdn) { 1552 if (comma) 1553 printf(","); 1554 printf("03 draft"); 1555 comma++; 1556 } else { 1557 cp = (u_char *)ni + ICMP6_NIRLEN; 1558 if (cp == end) { 1559 if (comma) 1560 printf(","); 1561 printf("no name"); 1562 comma++; 1563 } 1564 } 1565 1566 if (buf[off + ICMP6_NIRLEN] != 1567 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1568 if (comma) 1569 printf(","); 1570 (void)printf("invalid namelen:%d/%lu", 1571 buf[off + ICMP6_NIRLEN], 1572 (u_long)cc - off - ICMP6_NIRLEN - 1); 1573 comma++; 1574 } 1575 /*(*/ 1576 putchar(')'); 1577 } 1578 fqdnend: 1579 ; 1580 } 1581 } else { 1582 /* We've got something other than an ECHOREPLY */ 1583 if (!(options & F_VERBOSE)) 1584 return; 1585 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1586 pr_icmph(icp, end); 1587 } 1588 1589 if (!(options & F_FLOOD)) { 1590 (void)putchar('\n'); 1591 if (options & F_VERBOSE) 1592 pr_exthdrs(mhdr); 1593 (void)fflush(stdout); 1594 } 1595 #undef safeputc 1596 } 1597 1598 void 1599 pr_exthdrs(mhdr) 1600 struct msghdr *mhdr; 1601 { 1602 struct cmsghdr *cm; 1603 1604 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1605 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1606 if (cm->cmsg_level != IPPROTO_IPV6) 1607 continue; 1608 1609 switch (cm->cmsg_type) { 1610 case IPV6_HOPOPTS: 1611 printf(" HbH Options: "); 1612 pr_ip6opt(CMSG_DATA(cm)); 1613 break; 1614 case IPV6_DSTOPTS: 1615 #ifdef IPV6_RTHDRDSTOPTS 1616 case IPV6_RTHDRDSTOPTS: 1617 #endif 1618 printf(" Dst Options: "); 1619 pr_ip6opt(CMSG_DATA(cm)); 1620 break; 1621 case IPV6_RTHDR: 1622 printf(" Routing: "); 1623 pr_rthdr(CMSG_DATA(cm)); 1624 break; 1625 } 1626 } 1627 } 1628 1629 #ifdef USE_RFC2292BIS 1630 void 1631 pr_ip6opt(void *extbuf) 1632 { 1633 struct ip6_hbh *ext; 1634 int currentlen; 1635 u_int8_t type; 1636 size_t extlen, len; 1637 void *databuf; 1638 size_t offset; 1639 u_int16_t value2; 1640 u_int32_t value4; 1641 1642 ext = (struct ip6_hbh *)extbuf; 1643 extlen = (ext->ip6h_len + 1) * 8; 1644 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1645 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1646 1647 currentlen = 0; 1648 while (1) { 1649 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1650 &type, &len, &databuf); 1651 if (currentlen == -1) 1652 break; 1653 switch (type) { 1654 /* 1655 * Note that inet6_opt_next automatically skips any padding 1656 * optins. 1657 */ 1658 case IP6OPT_JUMBO: 1659 offset = 0; 1660 offset = inet6_opt_get_val(databuf, offset, 1661 &value4, sizeof(value4)); 1662 printf(" Jumbo Payload Opt: Length %u\n", 1663 (u_int32_t)ntohl(value4)); 1664 break; 1665 case IP6OPT_ROUTER_ALERT: 1666 offset = 0; 1667 offset = inet6_opt_get_val(databuf, offset, 1668 &value2, sizeof(value2)); 1669 printf(" Router Alert Opt: Type %u\n", 1670 ntohs(value2)); 1671 break; 1672 default: 1673 printf(" Received Opt %u len %lu\n", 1674 type, (unsigned long)len); 1675 break; 1676 } 1677 } 1678 return; 1679 } 1680 #else /* !USE_RFC2292BIS */ 1681 /* ARGSUSED */ 1682 void 1683 pr_ip6opt(void *extbuf) 1684 { 1685 putchar('\n'); 1686 return; 1687 } 1688 #endif /* USE_RFC2292BIS */ 1689 1690 #ifdef USE_RFC2292BIS 1691 void 1692 pr_rthdr(void *extbuf) 1693 { 1694 struct in6_addr *in6; 1695 char ntopbuf[INET6_ADDRSTRLEN]; 1696 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1697 int i, segments; 1698 1699 /* print fixed part of the header */ 1700 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1701 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1702 if ((segments = inet6_rth_segments(extbuf)) >= 0) 1703 printf("%d segments, ", segments); 1704 else 1705 printf("segments unknown, "); 1706 printf("%d left\n", rh->ip6r_segleft); 1707 1708 for (i = 0; i < segments; i++) { 1709 in6 = inet6_rth_getaddr(extbuf, i); 1710 if (in6 == NULL) 1711 printf(" [%d]<NULL>\n", i); 1712 else { 1713 if (!inet_ntop(AF_INET6, in6, ntopbuf, 1714 sizeof(ntopbuf))) 1715 strncpy(ntopbuf, "?", sizeof(ntopbuf)); 1716 printf(" [%d]%s\n", i, ntopbuf); 1717 } 1718 } 1719 1720 return; 1721 1722 } 1723 1724 #else /* !USE_RFC2292BIS */ 1725 /* ARGSUSED */ 1726 void 1727 pr_rthdr(void *extbuf) 1728 { 1729 putchar('\n'); 1730 return; 1731 } 1732 #endif /* USE_RFC2292BIS */ 1733 1734 int 1735 pr_bitrange(v, s, ii) 1736 u_int32_t v; 1737 int s; 1738 int ii; 1739 { 1740 int off; 1741 int i; 1742 1743 off = 0; 1744 while (off < 32) { 1745 /* shift till we have 0x01 */ 1746 if ((v & 0x01) == 0) { 1747 if (ii > 1) 1748 printf("-%u", s + off - 1); 1749 ii = 0; 1750 switch (v & 0x0f) { 1751 case 0x00: 1752 v >>= 4; 1753 off += 4; 1754 continue; 1755 case 0x08: 1756 v >>= 3; 1757 off += 3; 1758 continue; 1759 case 0x04: case 0x0c: 1760 v >>= 2; 1761 off += 2; 1762 continue; 1763 default: 1764 v >>= 1; 1765 off += 1; 1766 continue; 1767 } 1768 } 1769 1770 /* we have 0x01 with us */ 1771 for (i = 0; i < 32 - off; i++) { 1772 if ((v & (0x01 << i)) == 0) 1773 break; 1774 } 1775 if (!ii) 1776 printf(" %u", s + off); 1777 ii += i; 1778 v >>= i; off += i; 1779 } 1780 return ii; 1781 } 1782 1783 void 1784 pr_suptypes(ni, nilen) 1785 struct icmp6_nodeinfo *ni; /* ni->qtype must be SUPTYPES */ 1786 size_t nilen; 1787 { 1788 size_t clen; 1789 u_int32_t v; 1790 const u_char *cp, *end; 1791 u_int16_t cur; 1792 struct cbit { 1793 u_int16_t words; /*32bit count*/ 1794 u_int16_t skip; 1795 } cbit; 1796 #define MAXQTYPES (1 << 16) 1797 size_t off; 1798 int b; 1799 1800 cp = (u_char *)(ni + 1); 1801 end = ((u_char *)ni) + nilen; 1802 cur = 0; 1803 b = 0; 1804 1805 printf("NodeInfo Supported Qtypes"); 1806 if (options & F_VERBOSE) { 1807 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 1808 printf(", compressed bitmap"); 1809 else 1810 printf(", raw bitmap"); 1811 } 1812 1813 while (cp < end) { 1814 clen = (size_t)(end - cp); 1815 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 1816 if (clen == 0 || clen > MAXQTYPES / 8 || 1817 clen % sizeof(v)) { 1818 printf("???"); 1819 return; 1820 } 1821 } else { 1822 if (clen < sizeof(cbit) || clen % sizeof(v)) 1823 return; 1824 memcpy(&cbit, cp, sizeof(cbit)); 1825 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 1826 clen) 1827 return; 1828 cp += sizeof(cbit); 1829 clen = ntohs(cbit.words) * sizeof(v); 1830 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 1831 MAXQTYPES) 1832 return; 1833 } 1834 1835 for (off = 0; off < clen; off += sizeof(v)) { 1836 memcpy(&v, cp + off, sizeof(v)); 1837 v = (u_int32_t)ntohl(v); 1838 b = pr_bitrange(v, (int)(cur + off * 8), b); 1839 } 1840 /* flush the remaining bits */ 1841 b = pr_bitrange(0, (int)(cur + off * 8), b); 1842 1843 cp += clen; 1844 cur += clen * 8; 1845 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 1846 cur += ntohs(cbit.skip) * 32; 1847 } 1848 } 1849 1850 void 1851 pr_nodeaddr(ni, nilen) 1852 struct icmp6_nodeinfo *ni; /* ni->qtype must be NODEADDR */ 1853 int nilen; 1854 { 1855 u_char *cp = (u_char *)(ni + 1); 1856 char ntop_buf[INET6_ADDRSTRLEN]; 1857 int withttl = 0; 1858 1859 nilen -= sizeof(struct icmp6_nodeinfo); 1860 1861 if (options & F_VERBOSE) { 1862 switch (ni->ni_code) { 1863 case ICMP6_NI_REFUSED: 1864 (void)printf("refused"); 1865 break; 1866 case ICMP6_NI_UNKNOWN: 1867 (void)printf("unknown qtype"); 1868 break; 1869 } 1870 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 1871 (void)printf(" truncated"); 1872 } 1873 putchar('\n'); 1874 if (nilen <= 0) 1875 printf(" no address\n"); 1876 1877 /* 1878 * In icmp-name-lookups 05 and later, TTL of each returned address 1879 * is contained in the resposne. We try to detect the version 1880 * by the length of the data, but note that the detection algorithm 1881 * is incomplete. We assume the latest draft by default. 1882 */ 1883 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 1884 withttl = 1; 1885 while (nilen > 0) { 1886 u_int32_t ttl; 1887 1888 if (withttl) { 1889 /* XXX: alignment? */ 1890 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp); 1891 cp += sizeof(u_int32_t); 1892 nilen -= sizeof(u_int32_t); 1893 } 1894 1895 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 1896 NULL) 1897 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 1898 printf(" %s", ntop_buf); 1899 if (withttl) { 1900 if (ttl == 0xffffffff) { 1901 /* 1902 * XXX: can this convention be applied to all 1903 * type of TTL (i.e. non-ND TTL)? 1904 */ 1905 printf("(TTL=infty)"); 1906 } 1907 else 1908 printf("(TTL=%u)", ttl); 1909 } 1910 putchar('\n'); 1911 1912 nilen -= sizeof(struct in6_addr); 1913 cp += sizeof(struct in6_addr); 1914 } 1915 } 1916 1917 int 1918 get_hoplim(mhdr) 1919 struct msghdr *mhdr; 1920 { 1921 struct cmsghdr *cm; 1922 1923 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1924 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1925 if (cm->cmsg_len == 0) 1926 return(-1); 1927 1928 if (cm->cmsg_level == IPPROTO_IPV6 && 1929 cm->cmsg_type == IPV6_HOPLIMIT && 1930 cm->cmsg_len == CMSG_LEN(sizeof(int))) 1931 return(*(int *)CMSG_DATA(cm)); 1932 } 1933 1934 return(-1); 1935 } 1936 1937 struct in6_pktinfo * 1938 get_rcvpktinfo(mhdr) 1939 struct msghdr *mhdr; 1940 { 1941 struct cmsghdr *cm; 1942 1943 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1944 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1945 if (cm->cmsg_len == 0) 1946 return(NULL); 1947 1948 if (cm->cmsg_level == IPPROTO_IPV6 && 1949 cm->cmsg_type == IPV6_PKTINFO && 1950 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) 1951 return((struct in6_pktinfo *)CMSG_DATA(cm)); 1952 } 1953 1954 return(NULL); 1955 } 1956 1957 /* 1958 * tvsub -- 1959 * Subtract 2 timeval structs: out = out - in. Out is assumed to 1960 * be >= in. 1961 */ 1962 void 1963 tvsub(out, in) 1964 register struct timeval *out, *in; 1965 { 1966 if ((out->tv_usec -= in->tv_usec) < 0) { 1967 --out->tv_sec; 1968 out->tv_usec += 1000000; 1969 } 1970 out->tv_sec -= in->tv_sec; 1971 } 1972 1973 /* 1974 * onint -- 1975 * SIGINT handler. 1976 */ 1977 /* ARGSUSED */ 1978 void 1979 onint(notused) 1980 int notused; 1981 { 1982 summary(); 1983 1984 (void)signal(SIGINT, SIG_DFL); 1985 (void)kill(getpid(), SIGINT); 1986 1987 /* NOTREACHED */ 1988 exit(1); 1989 } 1990 1991 /* 1992 * summary -- 1993 * Print out statistics. 1994 */ 1995 void 1996 summary() 1997 { 1998 1999 (void)printf("\n--- %s ping6 statistics ---\n", hostname); 2000 (void)printf("%ld packets transmitted, ", ntransmitted); 2001 (void)printf("%ld packets received, ", nreceived); 2002 if (nrepeats) 2003 (void)printf("+%ld duplicates, ", nrepeats); 2004 if (ntransmitted) { 2005 if (nreceived > ntransmitted) 2006 (void)printf("-- somebody's printing up packets!"); 2007 else 2008 (void)printf("%d%% packet loss", 2009 (int) (((ntransmitted - nreceived) * 100) / 2010 ntransmitted)); 2011 } 2012 (void)putchar('\n'); 2013 if (nreceived && timing) { 2014 /* Only display average to microseconds */ 2015 double num = nreceived + nrepeats; 2016 double avg = tsum / num; 2017 #if defined(__OpenBSD__) || defined(__NetBSD__) 2018 double dev = sqrt(tsumsq / num - avg * avg); 2019 (void)printf( 2020 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2021 tmin, avg, tmax, dev); 2022 #else 2023 (void)printf( 2024 "round-trip min/avg/max = %.3f/%.3f/%.3f ms\n", 2025 tmin, avg, tmax); 2026 #endif 2027 (void)fflush(stdout); 2028 } 2029 (void)fflush(stdout); 2030 } 2031 2032 /*subject type*/ 2033 static char *niqcode[] = { 2034 "IPv6 address", 2035 "DNS label", /*or empty*/ 2036 "IPv4 address", 2037 }; 2038 2039 /*result code*/ 2040 static char *nircode[] = { 2041 "Success", "Refused", "Unknown", 2042 }; 2043 2044 2045 /* 2046 * pr_icmph -- 2047 * Print a descriptive string about an ICMP header. 2048 */ 2049 void 2050 pr_icmph(icp, end) 2051 struct icmp6_hdr *icp; 2052 u_char *end; 2053 { 2054 char ntop_buf[INET6_ADDRSTRLEN]; 2055 struct nd_redirect *red; 2056 struct icmp6_nodeinfo *ni; 2057 char dnsname[MAXDNAME + 1]; 2058 const u_char *cp; 2059 size_t l; 2060 2061 switch (icp->icmp6_type) { 2062 case ICMP6_DST_UNREACH: 2063 switch (icp->icmp6_code) { 2064 case ICMP6_DST_UNREACH_NOROUTE: 2065 (void)printf("No Route to Destination\n"); 2066 break; 2067 case ICMP6_DST_UNREACH_ADMIN: 2068 (void)printf("Destination Administratively " 2069 "Unreachable\n"); 2070 break; 2071 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2072 (void)printf("Destination Unreachable Beyond Scope\n"); 2073 break; 2074 case ICMP6_DST_UNREACH_ADDR: 2075 (void)printf("Destination Host Unreachable\n"); 2076 break; 2077 case ICMP6_DST_UNREACH_NOPORT: 2078 (void)printf("Destination Port Unreachable\n"); 2079 break; 2080 default: 2081 (void)printf("Destination Unreachable, Bad Code: %d\n", 2082 icp->icmp6_code); 2083 break; 2084 } 2085 /* Print returned IP header information */ 2086 pr_retip((struct ip6_hdr *)(icp + 1), end); 2087 break; 2088 case ICMP6_PACKET_TOO_BIG: 2089 (void)printf("Packet too big mtu = %d\n", 2090 (int)ntohl(icp->icmp6_mtu)); 2091 pr_retip((struct ip6_hdr *)(icp + 1), end); 2092 break; 2093 case ICMP6_TIME_EXCEEDED: 2094 switch (icp->icmp6_code) { 2095 case ICMP6_TIME_EXCEED_TRANSIT: 2096 (void)printf("Time to live exceeded\n"); 2097 break; 2098 case ICMP6_TIME_EXCEED_REASSEMBLY: 2099 (void)printf("Frag reassembly time exceeded\n"); 2100 break; 2101 default: 2102 (void)printf("Time exceeded, Bad Code: %d\n", 2103 icp->icmp6_code); 2104 break; 2105 } 2106 pr_retip((struct ip6_hdr *)(icp + 1), end); 2107 break; 2108 case ICMP6_PARAM_PROB: 2109 (void)printf("Parameter problem: "); 2110 switch (icp->icmp6_code) { 2111 case ICMP6_PARAMPROB_HEADER: 2112 (void)printf("Erroneous Header "); 2113 break; 2114 case ICMP6_PARAMPROB_NEXTHEADER: 2115 (void)printf("Unknown Nextheader "); 2116 break; 2117 case ICMP6_PARAMPROB_OPTION: 2118 (void)printf("Unrecognized Option "); 2119 break; 2120 default: 2121 (void)printf("Bad code(%d) ", icp->icmp6_code); 2122 break; 2123 } 2124 (void)printf("pointer = 0x%02x\n", 2125 (u_int32_t)ntohl(icp->icmp6_pptr)); 2126 pr_retip((struct ip6_hdr *)(icp + 1), end); 2127 break; 2128 case ICMP6_ECHO_REQUEST: 2129 (void)printf("Echo Request"); 2130 /* XXX ID + Seq + Data */ 2131 break; 2132 case ICMP6_ECHO_REPLY: 2133 (void)printf("Echo Reply"); 2134 /* XXX ID + Seq + Data */ 2135 break; 2136 case ICMP6_MEMBERSHIP_QUERY: 2137 (void)printf("Listener Query"); 2138 break; 2139 case ICMP6_MEMBERSHIP_REPORT: 2140 (void)printf("Listener Report"); 2141 break; 2142 case ICMP6_MEMBERSHIP_REDUCTION: 2143 (void)printf("Listener Done"); 2144 break; 2145 case ND_ROUTER_SOLICIT: 2146 (void)printf("Router Solicitation"); 2147 break; 2148 case ND_ROUTER_ADVERT: 2149 (void)printf("Router Advertisement"); 2150 break; 2151 case ND_NEIGHBOR_SOLICIT: 2152 (void)printf("Neighbor Solicitation"); 2153 break; 2154 case ND_NEIGHBOR_ADVERT: 2155 (void)printf("Neighbor Advertisement"); 2156 break; 2157 case ND_REDIRECT: 2158 red = (struct nd_redirect *)icp; 2159 (void)printf("Redirect\n"); 2160 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2161 sizeof(ntop_buf))) 2162 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2163 (void)printf("Destination: %s", ntop_buf); 2164 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2165 sizeof(ntop_buf))) 2166 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2167 (void)printf(" New Target: %s", ntop_buf); 2168 break; 2169 case ICMP6_NI_QUERY: 2170 (void)printf("Node Information Query"); 2171 /* XXX ID + Seq + Data */ 2172 ni = (struct icmp6_nodeinfo *)icp; 2173 l = end - (u_char *)(ni + 1); 2174 printf(", "); 2175 switch (ntohs(ni->ni_qtype)) { 2176 case NI_QTYPE_NOOP: 2177 (void)printf("NOOP"); 2178 break; 2179 case NI_QTYPE_SUPTYPES: 2180 (void)printf("Supported qtypes"); 2181 break; 2182 case NI_QTYPE_FQDN: 2183 (void)printf("DNS name"); 2184 break; 2185 case NI_QTYPE_NODEADDR: 2186 (void)printf("nodeaddr"); 2187 break; 2188 case NI_QTYPE_IPV4ADDR: 2189 (void)printf("IPv4 nodeaddr"); 2190 break; 2191 default: 2192 (void)printf("unknown qtype"); 2193 break; 2194 } 2195 if (options & F_VERBOSE) { 2196 switch (ni->ni_code) { 2197 case ICMP6_NI_SUBJ_IPV6: 2198 if (l == sizeof(struct in6_addr) && 2199 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2200 sizeof(ntop_buf)) != NULL) { 2201 (void)printf(", subject=%s(%s)", 2202 niqcode[ni->ni_code], ntop_buf); 2203 } else { 2204 #if 1 2205 /* backward compat to -W */ 2206 (void)printf(", oldfqdn"); 2207 #else 2208 (void)printf(", invalid"); 2209 #endif 2210 } 2211 break; 2212 case ICMP6_NI_SUBJ_FQDN: 2213 if (end == (u_char *)(ni + 1)) { 2214 (void)printf(", no subject"); 2215 break; 2216 } 2217 printf(", subject=%s", niqcode[ni->ni_code]); 2218 cp = (const u_char *)(ni + 1); 2219 if (dnsdecode(&cp, end, NULL, dnsname, 2220 sizeof(dnsname)) != NULL) 2221 printf("(%s)", dnsname); 2222 else 2223 printf("(invalid)"); 2224 break; 2225 case ICMP6_NI_SUBJ_IPV4: 2226 if (l == sizeof(struct in_addr) && 2227 inet_ntop(AF_INET, ni + 1, ntop_buf, 2228 sizeof(ntop_buf)) != NULL) { 2229 (void)printf(", subject=%s(%s)", 2230 niqcode[ni->ni_code], ntop_buf); 2231 } else 2232 (void)printf(", invalid"); 2233 break; 2234 default: 2235 (void)printf(", invalid"); 2236 break; 2237 } 2238 } 2239 break; 2240 case ICMP6_NI_REPLY: 2241 (void)printf("Node Information Reply"); 2242 /* XXX ID + Seq + Data */ 2243 ni = (struct icmp6_nodeinfo *)icp; 2244 printf(", "); 2245 switch (ntohs(ni->ni_qtype)) { 2246 case NI_QTYPE_NOOP: 2247 (void)printf("NOOP"); 2248 break; 2249 case NI_QTYPE_SUPTYPES: 2250 (void)printf("Supported qtypes"); 2251 break; 2252 case NI_QTYPE_FQDN: 2253 (void)printf("DNS name"); 2254 break; 2255 case NI_QTYPE_NODEADDR: 2256 (void)printf("nodeaddr"); 2257 break; 2258 case NI_QTYPE_IPV4ADDR: 2259 (void)printf("IPv4 nodeaddr"); 2260 break; 2261 default: 2262 (void)printf("unknown qtype"); 2263 break; 2264 } 2265 if (options & F_VERBOSE) { 2266 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0])) 2267 printf(", invalid"); 2268 else 2269 printf(", %s", nircode[ni->ni_code]); 2270 } 2271 break; 2272 default: 2273 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2274 } 2275 } 2276 2277 /* 2278 * pr_iph -- 2279 * Print an IP6 header. 2280 */ 2281 void 2282 pr_iph(ip6) 2283 struct ip6_hdr *ip6; 2284 { 2285 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2286 u_int8_t tc; 2287 char ntop_buf[INET6_ADDRSTRLEN]; 2288 2289 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2290 tc = (tc >> 4) & 0x0f; 2291 tc |= (ip6->ip6_vfc << 4); 2292 2293 printf("Vr TC Flow Plen Nxt Hlim\n"); 2294 printf(" %1x %02x %05x %04x %02x %02x\n", 2295 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2296 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2297 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2298 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2299 printf("%s->", ntop_buf); 2300 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2301 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2302 printf("%s\n", ntop_buf); 2303 } 2304 2305 /* 2306 * pr_addr -- 2307 * Return an ascii host address as a dotted quad and optionally with 2308 * a hostname. 2309 */ 2310 const char * 2311 pr_addr(addr, addrlen) 2312 struct sockaddr *addr; 2313 int addrlen; 2314 { 2315 static char buf[NI_MAXHOST]; 2316 int flag; 2317 2318 #ifdef NI_WITHSCOPEID 2319 flag = NI_WITHSCOPEID; 2320 #else 2321 flag = 0; 2322 #endif 2323 if ((options & F_HOSTNAME) == 0) 2324 flag |= NI_NUMERICHOST; 2325 2326 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) 2327 return (buf); 2328 else 2329 return "?"; 2330 } 2331 2332 /* 2333 * pr_retip -- 2334 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2335 */ 2336 void 2337 pr_retip(ip6, end) 2338 struct ip6_hdr *ip6; 2339 u_char *end; 2340 { 2341 u_char *cp = (u_char *)ip6, nh; 2342 int hlen; 2343 2344 if (end - (u_char *)ip6 < sizeof(*ip6)) { 2345 printf("IP6"); 2346 goto trunc; 2347 } 2348 pr_iph(ip6); 2349 hlen = sizeof(*ip6); 2350 2351 nh = ip6->ip6_nxt; 2352 cp += hlen; 2353 while (end - cp >= 8) { 2354 switch (nh) { 2355 case IPPROTO_HOPOPTS: 2356 printf("HBH "); 2357 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2358 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2359 break; 2360 case IPPROTO_DSTOPTS: 2361 printf("DSTOPT "); 2362 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2363 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2364 break; 2365 case IPPROTO_FRAGMENT: 2366 printf("FRAG "); 2367 hlen = sizeof(struct ip6_frag); 2368 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2369 break; 2370 case IPPROTO_ROUTING: 2371 printf("RTHDR "); 2372 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2373 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2374 break; 2375 #ifdef IPSEC 2376 case IPPROTO_AH: 2377 printf("AH "); 2378 hlen = (((struct ah *)cp)->ah_len+2) << 2; 2379 nh = ((struct ah *)cp)->ah_nxt; 2380 break; 2381 #endif 2382 case IPPROTO_ICMPV6: 2383 printf("ICMP6: type = %d, code = %d\n", 2384 *cp, *(cp + 1)); 2385 return; 2386 case IPPROTO_ESP: 2387 printf("ESP\n"); 2388 return; 2389 case IPPROTO_TCP: 2390 printf("TCP: from port %u, to port %u (decimal)\n", 2391 (*cp * 256 + *(cp + 1)), 2392 (*(cp + 2) * 256 + *(cp + 3))); 2393 return; 2394 case IPPROTO_UDP: 2395 printf("UDP: from port %u, to port %u (decimal)\n", 2396 (*cp * 256 + *(cp + 1)), 2397 (*(cp + 2) * 256 + *(cp + 3))); 2398 return; 2399 default: 2400 printf("Unknown Header(%d)\n", nh); 2401 return; 2402 } 2403 2404 if ((cp += hlen) >= end) 2405 goto trunc; 2406 } 2407 if (end - cp < 8) 2408 goto trunc; 2409 2410 putchar('\n'); 2411 return; 2412 2413 trunc: 2414 printf("...\n"); 2415 return; 2416 } 2417 2418 void 2419 fill(bp, patp) 2420 char *bp, *patp; 2421 { 2422 register int ii, jj, kk; 2423 int pat[16]; 2424 char *cp; 2425 2426 for (cp = patp; *cp; cp++) 2427 if (!isxdigit(*cp)) 2428 errx(1, "patterns must be specified as hex digits"); 2429 ii = sscanf(patp, 2430 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2431 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2432 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2433 &pat[13], &pat[14], &pat[15]); 2434 2435 /* xxx */ 2436 if (ii > 0) 2437 for (kk = 0; 2438 kk <= MAXDATALEN - (8 + sizeof(struct timeval) + ii); 2439 kk += ii) 2440 for (jj = 0; jj < ii; ++jj) 2441 bp[jj + kk] = pat[jj]; 2442 if (!(options & F_QUIET)) { 2443 (void)printf("PATTERN: 0x"); 2444 for (jj = 0; jj < ii; ++jj) 2445 (void)printf("%02x", bp[jj] & 0xFF); 2446 (void)printf("\n"); 2447 } 2448 } 2449 2450 #ifdef IPSEC 2451 #ifdef IPSEC_POLICY_IPSEC 2452 int 2453 setpolicy(so, policy) 2454 int so; 2455 char *policy; 2456 { 2457 char *buf; 2458 2459 if (policy == NULL) 2460 return 0; /* ignore */ 2461 2462 buf = ipsec_set_policy(policy, strlen(policy)); 2463 if (buf == NULL) 2464 errx(1, "%s", ipsec_strerror()); 2465 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2466 ipsec_get_policylen(buf)) < 0) 2467 warnx("Unable to set IPSec policy"); 2468 free(buf); 2469 2470 return 0; 2471 } 2472 #endif 2473 #endif 2474 2475 char * 2476 nigroup(name) 2477 char *name; 2478 { 2479 char *p; 2480 unsigned char *q; 2481 MD5_CTX ctxt; 2482 u_int8_t digest[16]; 2483 u_int8_t c; 2484 size_t l; 2485 char hbuf[NI_MAXHOST]; 2486 struct in6_addr in6; 2487 2488 p = strchr(name, '.'); 2489 if (!p) 2490 p = name + strlen(name); 2491 l = p - name; 2492 if (l > 63 || l > sizeof(hbuf) - 1) 2493 return NULL; /*label too long*/ 2494 strncpy(hbuf, name, l); 2495 hbuf[(int)l] = '\0'; 2496 2497 for (q = name; *q; q++) { 2498 if (isupper(*q)) 2499 *q = tolower(*q); 2500 } 2501 2502 /* generate 8 bytes of pseudo-random value. */ 2503 bzero(&ctxt, sizeof(ctxt)); 2504 MD5Init(&ctxt); 2505 c = l & 0xff; 2506 MD5Update(&ctxt, &c, sizeof(c)); 2507 MD5Update(&ctxt, name, l); 2508 MD5Final(digest, &ctxt); 2509 2510 if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1) 2511 return NULL; /*XXX*/ 2512 bcopy(digest, &in6.s6_addr[12], 4); 2513 2514 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2515 return NULL; 2516 2517 return strdup(hbuf); 2518 } 2519 2520 void 2521 usage() 2522 { 2523 (void)fprintf(stderr, 2524 "usage: ping6 [-dfHnNqvwW" 2525 #ifdef IPV6_REACHCONF 2526 "R" 2527 #endif 2528 #ifdef IPSEC 2529 #ifdef IPSEC_POLICY_IPSEC 2530 "] [-P policy" 2531 #else 2532 "AE" 2533 #endif 2534 #endif 2535 "] [-a [aAclsg]] [-b sockbufsiz] [-c count] \n" 2536 "\t[-I interface] [-i wait] [-l preload] [-p pattern] " 2537 "[-S sourceaddr]\n" 2538 "\t[-s packetsize] [-h hoplimit] [hops...] host\n"); 2539 exit(1); 2540 } 2541
Indexes created Mon Oct 20 20:10:13 GMT 2025