1 /* $KAME: ping6.c,v 1.126 2001/05/17 03:39:08 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 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 32 * @(#)ping.c 8.1 (Berkeley) 6/5/93 33 * $FreeBSD: src/sbin/ping6/ping6.c,v 1.4.2.10 2002/12/09 03:04:44 suz Exp $ 34 * $DragonFly: src/sbin/ping6/ping6.c,v 1.3 2003/09/28 14:39:20 hmp Exp $ 35 */ 36 37 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */ 38 39 /* 40 * Copyright (c) 1989, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * Mike Muuss. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 */ 74 75 /* 76 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 77 * measure round-trip-delays and packet loss across network paths. 78 * 79 * Author - 80 * Mike Muuss 81 * U. S. Army Ballistic Research Laboratory 82 * December, 1983 83 * 84 * Status - 85 * Public Domain. Distribution Unlimited. 86 * Bugs - 87 * More statistics could always be gathered. 88 * This program has to run SUID to ROOT to access the ICMP socket. 89 */ 90 /* 91 * NOTE: 92 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics 93 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link* 94 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of 95 * network attached to 1 or more interfaces) 96 */ 97 98 #include <sys/param.h> 99 #include <sys/uio.h> 100 #include <sys/socket.h> 101 #include <sys/time.h> 102 103 #include <net/if.h> 104 #include <net/route.h> 105 106 #include <netinet/in.h> 107 #include <netinet/ip6.h> 108 #include <netinet/icmp6.h> 109 #include <arpa/inet.h> 110 #include <arpa/nameser.h> 111 #include <netdb.h> 112 113 #include <ctype.h> 114 #include <err.h> 115 #include <errno.h> 116 #include <fcntl.h> 117 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) 118 #include <math.h> 119 #endif 120 #include <signal.h> 121 #include <stdio.h> 122 #include <stdlib.h> 123 #include <string.h> 124 #include <unistd.h> 125 126 #ifdef IPSEC 127 #include <netinet6/ah.h> 128 #include <netinet6/ipsec.h> 129 #endif 130 131 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) 132 #include <md5.h> 133 #else 134 #include "md5.h" 135 #endif 136 137 #define MAXPACKETLEN 131072 138 #define IP6LEN 40 139 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 140 #define ICMP6ECHOTMLEN sizeof(struct timeval) 141 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 142 /* FQDN case, 64 bits of nonce + 32 bits ttl */ 143 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 144 #define EXTRA 256 /* for AH and various other headers. weird. */ 145 #define DEFDATALEN ICMP6ECHOTMLEN 146 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 147 #define NROUTES 9 /* number of record route slots */ 148 149 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 150 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 151 #define SET(bit) (A(bit) |= B(bit)) 152 #define CLR(bit) (A(bit) &= (~B(bit))) 153 #define TST(bit) (A(bit) & B(bit)) 154 155 #define F_FLOOD 0x0001 156 #define F_INTERVAL 0x0002 157 #define F_PINGFILLED 0x0008 158 #define F_QUIET 0x0010 159 #define F_RROUTE 0x0020 160 #define F_SO_DEBUG 0x0040 161 #define F_VERBOSE 0x0100 162 #ifdef IPSEC 163 #ifdef IPSEC_POLICY_IPSEC 164 #define F_POLICY 0x0400 165 #else 166 #define F_AUTHHDR 0x0200 167 #define F_ENCRYPT 0x0400 168 #endif /*IPSEC_POLICY_IPSEC*/ 169 #endif /*IPSEC*/ 170 #define F_NODEADDR 0x0800 171 #define F_FQDN 0x1000 172 #define F_INTERFACE 0x2000 173 #define F_SRCADDR 0x4000 174 #ifdef IPV6_REACHCONF 175 #define F_REACHCONF 0x8000 176 #endif 177 #define F_HOSTNAME 0x10000 178 #define F_FQDNOLD 0x20000 179 #define F_NIGROUP 0x40000 180 #define F_SUPTYPES 0x80000 181 #define F_NOMINMTU 0x100000 182 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 183 u_int options; 184 185 #define IN6LEN sizeof(struct in6_addr) 186 #define SA6LEN sizeof(struct sockaddr_in6) 187 #define DUMMY_PORT 10101 188 189 #define SIN6(s) ((struct sockaddr_in6 *)(s)) 190 191 /* 192 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 193 * number of received sequence numbers we can keep track of. Change 128 194 * to 8192 for complete accuracy... 195 */ 196 #define MAX_DUP_CHK (8 * 8192) 197 int mx_dup_ck = MAX_DUP_CHK; 198 char rcvd_tbl[MAX_DUP_CHK / 8]; 199 200 struct addrinfo *res; 201 struct sockaddr_in6 dst; /* who to ping6 */ 202 struct sockaddr_in6 src; /* src addr of this packet */ 203 int datalen = DEFDATALEN; 204 int s; /* socket file descriptor */ 205 u_char outpack[MAXPACKETLEN]; 206 char BSPACE = '\b'; /* characters written for flood */ 207 char DOT = '.'; 208 char *hostname; 209 int ident; /* process id to identify our packets */ 210 u_int8_t nonce[8]; /* nonce field for node information */ 211 struct in6_addr srcaddr; 212 int hoplimit = -1; /* hoplimit */ 213 int pathmtu = 0; /* path MTU for the destination. 0 = unspec. */ 214 215 /* counters */ 216 long npackets; /* max packets to transmit */ 217 long nreceived; /* # of packets we got back */ 218 long nrepeats; /* number of duplicates */ 219 long ntransmitted; /* sequence # for outbound packets = #sent */ 220 struct timeval interval = {1, 0}; /* interval between packets */ 221 222 /* timing */ 223 int timing; /* flag to do timing */ 224 double tmin = 999999999.0; /* minimum round trip time */ 225 double tmax = 0.0; /* maximum round trip time */ 226 double tsum = 0.0; /* sum of all times, for doing average */ 227 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) 228 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 229 #endif 230 231 /* for node addresses */ 232 u_short naflags; 233 234 /* for ancillary data(advanced API) */ 235 struct msghdr smsghdr; 236 struct iovec smsgiov; 237 char *scmsg = 0; 238 239 volatile int signo; 240 volatile sig_atomic_t seenalrm; 241 volatile sig_atomic_t seenint; 242 #ifdef SIGINFO 243 volatile sig_atomic_t seeninfo; 244 #endif 245 246 int main __P((int, char *[])); 247 void fill __P((char *, char *)); 248 int get_hoplim __P((struct msghdr *)); 249 int get_pathmtu __P((struct msghdr *)); 250 void set_pathmtu __P((int)); 251 struct in6_pktinfo *get_rcvpktinfo __P((struct msghdr *)); 252 void onsignal __P((int)); 253 void retransmit __P((void)); 254 void onint __P((int)); 255 size_t pingerlen __P((void)); 256 int pinger __P((void)); 257 const char *pr_addr __P((struct sockaddr *, int)); 258 void pr_icmph __P((struct icmp6_hdr *, u_char *)); 259 void pr_iph __P((struct ip6_hdr *)); 260 void pr_suptypes __P((struct icmp6_nodeinfo *, size_t)); 261 void pr_nodeaddr __P((struct icmp6_nodeinfo *, int)); 262 int myechoreply __P((const struct icmp6_hdr *)); 263 int mynireply __P((const struct icmp6_nodeinfo *)); 264 char *dnsdecode __P((const u_char **, const u_char *, const u_char *, 265 u_char *, size_t)); 266 void pr_pack __P((u_char *, int, struct msghdr *)); 267 void pr_exthdrs __P((struct msghdr *)); 268 void pr_ip6opt __P((void *)); 269 void pr_rthdr __P((void *)); 270 int pr_bitrange __P((u_int32_t, int, int)); 271 void pr_retip __P((struct ip6_hdr *, u_char *)); 272 void summary __P((void)); 273 void tvsub __P((struct timeval *, struct timeval *)); 274 int setpolicy __P((int, char *)); 275 char *nigroup __P((char *)); 276 void usage __P((void)); 277 278 int 279 main(int argc, char **argv) 280 { 281 struct itimerval itimer; 282 struct sockaddr_in6 from; 283 struct timeval timeout, *tv; 284 struct addrinfo hints; 285 fd_set *fdmaskp; 286 int fdmasks; 287 register int cc, i; 288 int ch, fromlen, hold, packlen, preload, optval, ret_ga; 289 u_char *datap, *packet; 290 char *e, *target, *ifname = NULL; 291 int ip6optlen = 0; 292 struct cmsghdr *scmsgp = NULL; 293 int sockbufsize = 0; 294 int usepktinfo = 0; 295 struct in6_pktinfo *pktinfo = NULL; 296 #ifdef USE_RFC2292BIS 297 struct ip6_rthdr *rthdr = NULL; 298 #endif 299 #ifdef IPSEC_POLICY_IPSEC 300 char *policy_in = NULL; 301 char *policy_out = NULL; 302 #endif 303 double intval; 304 size_t rthlen; 305 306 /* just to be sure */ 307 memset(&smsghdr, 0, sizeof(smsghdr)); 308 memset(&smsgiov, 0, sizeof(smsgiov)); 309 310 preload = 0; 311 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 312 #ifndef IPSEC 313 #define ADDOPTS 314 #else 315 #ifdef IPSEC_POLICY_IPSEC 316 #define ADDOPTS "P:" 317 #else 318 #define ADDOPTS "AE" 319 #endif /*IPSEC_POLICY_IPSEC*/ 320 #endif 321 while ((ch = getopt(argc, argv, 322 "a:b:c:dfHh:I:i:l:mnNp:qRS:s:tvwW" ADDOPTS)) != -1) { 323 #undef ADDOPTS 324 switch (ch) { 325 case 'a': 326 { 327 char *cp; 328 329 options &= ~F_NOUSERDATA; 330 options |= F_NODEADDR; 331 for (cp = optarg; *cp != '\0'; cp++) { 332 switch (*cp) { 333 case 'a': 334 naflags |= NI_NODEADDR_FLAG_ALL; 335 break; 336 case 'c': 337 case 'C': 338 naflags |= NI_NODEADDR_FLAG_COMPAT; 339 break; 340 case 'l': 341 case 'L': 342 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 343 break; 344 case 's': 345 case 'S': 346 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 347 break; 348 case 'g': 349 case 'G': 350 naflags |= NI_NODEADDR_FLAG_GLOBAL; 351 break; 352 case 'A': /* experimental. not in the spec */ 353 #ifdef NI_NODEADDR_FLAG_ANYCAST 354 naflags |= NI_NODEADDR_FLAG_ANYCAST; 355 break; 356 #else 357 errx(1, 358 "-a A is not supported on the platform"); 359 /*NOTREACHED*/ 360 #endif 361 default: 362 usage(); 363 /*NOTREACHED*/ 364 } 365 } 366 break; 367 } 368 case 'b': 369 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 370 sockbufsize = atoi(optarg); 371 #else 372 err(1, 373 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 374 #endif 375 break; 376 case 'c': 377 npackets = strtol(optarg, &e, 10); 378 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 379 errx(1, 380 "illegal number of packets -- %s", optarg); 381 break; 382 case 'd': 383 options |= F_SO_DEBUG; 384 break; 385 case 'f': 386 if (getuid()) { 387 errno = EPERM; 388 errx(1, "Must be superuser to flood ping"); 389 } 390 options |= F_FLOOD; 391 setbuf(stdout, (char *)NULL); 392 break; 393 case 'H': 394 options |= F_HOSTNAME; 395 break; 396 case 'h': /* hoplimit */ 397 hoplimit = strtol(optarg, &e, 10); 398 if (255 < hoplimit || hoplimit < -1) 399 errx(1, 400 "illegal hoplimit -- %s", optarg); 401 break; 402 case 'I': 403 ifname = optarg; 404 options |= F_INTERFACE; 405 #ifndef USE_SIN6_SCOPE_ID 406 usepktinfo++; 407 #endif 408 break; 409 case 'i': /* wait between sending packets */ 410 intval = strtod(optarg, &e); 411 if (*optarg == '\0' || *e != '\0') 412 errx(1, "illegal timing interval %s", optarg); 413 if (intval < 1 && getuid()) { 414 errx(1, "%s: only root may use interval < 1s", 415 strerror(EPERM)); 416 } 417 interval.tv_sec = (long)intval; 418 interval.tv_usec = 419 (long)((intval - interval.tv_sec) * 1000000); 420 if (interval.tv_sec < 0) 421 errx(1, "illegal timing interval %s", optarg); 422 /* less than 1/hz does not make sense */ 423 if (interval.tv_sec == 0 && interval.tv_usec < 10000) { 424 warnx("too small interval, raised to 0.01"); 425 interval.tv_usec = 10000; 426 } 427 options |= F_INTERVAL; 428 break; 429 case 'l': 430 if (getuid()) { 431 errno = EPERM; 432 errx(1, "Must be superuser to preload"); 433 } 434 preload = strtol(optarg, &e, 10); 435 if (preload < 0 || *optarg == '\0' || *e != '\0') 436 errx(1, "illegal preload value -- %s", optarg); 437 break; 438 case 'm': 439 #ifdef IPV6_USE_MIN_MTU 440 options |= F_NOMINMTU; 441 break; 442 #else 443 errx(1, "-%c is not supported on this platform", ch); 444 /*NOTREACHED*/ 445 #endif 446 case 'n': 447 options &= ~F_HOSTNAME; 448 break; 449 case 'N': 450 options |= F_NIGROUP; 451 break; 452 case 'p': /* fill buffer with user pattern */ 453 options |= F_PINGFILLED; 454 fill((char *)datap, optarg); 455 break; 456 case 'q': 457 options |= F_QUIET; 458 break; 459 case 'R': 460 #ifdef IPV6_REACHCONF 461 options |= F_REACHCONF; 462 break; 463 #else 464 errx(1, "-R is not supported in this configuration"); 465 #endif 466 case 'S': 467 /* XXX: use getaddrinfo? */ 468 if (inet_pton(AF_INET6, optarg, (void *)&srcaddr) != 1) 469 errx(1, "invalid IPv6 address: %s", optarg); 470 options |= F_SRCADDR; 471 usepktinfo++; 472 break; 473 case 's': /* size of packet to send */ 474 datalen = strtol(optarg, &e, 10); 475 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 476 errx(1, "illegal datalen value -- %s", optarg); 477 if (datalen > MAXDATALEN) { 478 errx(1, 479 "datalen value too large, maximum is %d", 480 MAXDATALEN); 481 } 482 break; 483 case 't': 484 options &= ~F_NOUSERDATA; 485 options |= F_SUPTYPES; 486 break; 487 case 'v': 488 options |= F_VERBOSE; 489 break; 490 case 'w': 491 options &= ~F_NOUSERDATA; 492 options |= F_FQDN; 493 break; 494 case 'W': 495 options &= ~F_NOUSERDATA; 496 options |= F_FQDNOLD; 497 break; 498 #ifdef IPSEC 499 #ifdef IPSEC_POLICY_IPSEC 500 case 'P': 501 options |= F_POLICY; 502 if (!strncmp("in", optarg, 2)) { 503 if ((policy_in = strdup(optarg)) == NULL) 504 errx(1, "strdup"); 505 } else if (!strncmp("out", optarg, 3)) { 506 if ((policy_out = strdup(optarg)) == NULL) 507 errx(1, "strdup"); 508 } else 509 errx(1, "invalid security policy"); 510 break; 511 #else 512 case 'A': 513 options |= F_AUTHHDR; 514 break; 515 case 'E': 516 options |= F_ENCRYPT; 517 break; 518 #endif /*IPSEC_POLICY_IPSEC*/ 519 #endif /*IPSEC*/ 520 default: 521 usage(); 522 /*NOTREACHED*/ 523 } 524 } 525 argc -= optind; 526 argv += optind; 527 528 if (argc < 1) { 529 usage(); 530 /*NOTREACHED*/ 531 } 532 533 if (argc > 1) { 534 #ifdef IPV6_RECVRTHDR /* 2292bis */ 535 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 536 argc - 1)); 537 #else /* RFC2292 */ 538 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 539 #endif 540 if (rthlen == 0) { 541 errx(1, "too many intermediate hops"); 542 /*NOTREACHED*/ 543 } 544 ip6optlen += rthlen; 545 } 546 547 if (options & F_NIGROUP) { 548 target = nigroup(argv[argc - 1]); 549 if (target == NULL) { 550 usage(); 551 /*NOTREACHED*/ 552 } 553 } else 554 target = argv[argc - 1]; 555 556 /* getaddrinfo */ 557 bzero(&hints, sizeof(struct addrinfo)); 558 hints.ai_flags = AI_CANONNAME; 559 hints.ai_family = AF_INET6; 560 hints.ai_socktype = SOCK_RAW; 561 hints.ai_protocol = IPPROTO_ICMPV6; 562 563 ret_ga = getaddrinfo(target, NULL, &hints, &res); 564 if (ret_ga) { 565 fprintf(stderr, "ping6: %s\n", gai_strerror(ret_ga)); 566 exit(1); 567 } 568 if (res->ai_canonname) 569 hostname = res->ai_canonname; 570 else 571 hostname = target; 572 573 if (!res->ai_addr) 574 errx(1, "getaddrinfo failed"); 575 576 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 577 578 if ((s = socket(res->ai_family, res->ai_socktype, 579 res->ai_protocol)) < 0) 580 err(1, "socket"); 581 582 /* 583 * let the kerel pass extension headers of incoming packets, 584 * for privileged socket options 585 */ 586 if ((options & F_VERBOSE) != 0) { 587 int opton = 1; 588 589 #ifdef IPV6_RECVHOPOPTS 590 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 591 sizeof(opton))) 592 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 593 #else /* old adv. API */ 594 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 595 sizeof(opton))) 596 err(1, "setsockopt(IPV6_HOPOPTS)"); 597 #endif 598 #ifdef IPV6_RECVDSTOPTS 599 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 600 sizeof(opton))) 601 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 602 #else /* old adv. API */ 603 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 604 sizeof(opton))) 605 err(1, "setsockopt(IPV6_DSTOPTS)"); 606 #endif 607 #ifdef IPV6_RECVRTHDRDSTOPTS 608 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 609 sizeof(opton))) 610 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 611 #endif 612 } 613 614 /* revoke root privilege */ 615 seteuid(getuid()); 616 setuid(getuid()); 617 618 if (options & F_FLOOD && options & F_INTERVAL) 619 errx(1, "-f and -i incompatible options"); 620 621 if ((options & F_NOUSERDATA) == 0) { 622 if (datalen >= sizeof(struct timeval)) { 623 /* we can time transfer */ 624 timing = 1; 625 } else 626 timing = 0; 627 /* in F_VERBOSE case, we may get non-echoreply packets*/ 628 if (options & F_VERBOSE) 629 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 630 else 631 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 632 } else { 633 /* suppress timing for node information query */ 634 timing = 0; 635 datalen = 2048; 636 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 637 } 638 639 if (!(packet = (u_char *)malloc((u_int)packlen))) 640 err(1, "Unable to allocate packet"); 641 if (!(options & F_PINGFILLED)) 642 for (i = ICMP6ECHOLEN; i < packlen; ++i) 643 *datap++ = i; 644 645 ident = getpid() & 0xFFFF; 646 #ifndef __OpenBSD__ 647 gettimeofday(&timeout, NULL); 648 srand((unsigned int)(timeout.tv_sec ^ timeout.tv_usec ^ (long)ident)); 649 memset(nonce, 0, sizeof(nonce)); 650 for (i = 0; i < sizeof(nonce); i += sizeof(int)) 651 *((int *)&nonce[i]) = rand(); 652 #else 653 memset(nonce, 0, sizeof(nonce)); 654 for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t)) 655 *((u_int32_t *)&nonce[i]) = arc4random(); 656 #endif 657 658 hold = 1; 659 660 if (options & F_SO_DEBUG) 661 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 662 sizeof(hold)); 663 optval = IPV6_DEFHLIM; 664 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 665 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 666 &optval, sizeof(optval)) == -1) 667 err(1, "IPV6_MULTICAST_HOPS"); 668 #ifdef IPV6_USE_MIN_MTU 669 if ((options & F_NOMINMTU) == 0) { 670 optval = 1; 671 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 672 &optval, sizeof(optval)) == -1) 673 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 674 } 675 #ifdef IPV6_RECVPATHMTU 676 else { 677 optval = 1; 678 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, 679 &optval, sizeof(optval)) == -1) 680 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 681 } 682 #endif /* IPV6_RECVPATHMTU */ 683 #endif /* IPV6_USE_MIN_MTU */ 684 685 #ifdef IPSEC 686 #ifdef IPSEC_POLICY_IPSEC 687 if (options & F_POLICY) { 688 if (setpolicy(s, policy_in) < 0) 689 errx(1, "%s", ipsec_strerror()); 690 if (setpolicy(s, policy_out) < 0) 691 errx(1, "%s", ipsec_strerror()); 692 } 693 #else 694 if (options & F_AUTHHDR) { 695 optval = IPSEC_LEVEL_REQUIRE; 696 #ifdef IPV6_AUTH_TRANS_LEVEL 697 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 698 &optval, sizeof(optval)) == -1) 699 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 700 #else /* old def */ 701 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 702 &optval, sizeof(optval)) == -1) 703 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 704 #endif 705 } 706 if (options & F_ENCRYPT) { 707 optval = IPSEC_LEVEL_REQUIRE; 708 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 709 &optval, sizeof(optval)) == -1) 710 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 711 } 712 #endif /*IPSEC_POLICY_IPSEC*/ 713 #endif 714 715 #ifdef ICMP6_FILTER 716 { 717 struct icmp6_filter filt; 718 if (!(options & F_VERBOSE)) { 719 ICMP6_FILTER_SETBLOCKALL(&filt); 720 if ((options & F_FQDN) || (options & F_FQDNOLD) || 721 (options & F_NODEADDR) || (options & F_SUPTYPES)) 722 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 723 else 724 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 725 } else { 726 ICMP6_FILTER_SETPASSALL(&filt); 727 } 728 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 729 sizeof(filt)) < 0) 730 err(1, "setsockopt(ICMP6_FILTER)"); 731 } 732 #endif /*ICMP6_FILTER*/ 733 734 /* let the kerel pass extension headers of incoming packets */ 735 if ((options & F_VERBOSE) != 0) { 736 int opton = 1; 737 738 #ifdef IPV6_RECVRTHDR 739 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 740 sizeof(opton))) 741 err(1, "setsockopt(IPV6_RECVRTHDR)"); 742 #else /* old adv. API */ 743 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton, 744 sizeof(opton))) 745 err(1, "setsockopt(IPV6_RTHDR)"); 746 #endif 747 } 748 749 /* 750 optval = 1; 751 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 752 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 753 &optval, sizeof(optval)) == -1) 754 err(1, "IPV6_MULTICAST_LOOP"); 755 */ 756 757 /* Specify the outgoing interface and/or the source address */ 758 if (usepktinfo) 759 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 760 761 if (hoplimit != -1) 762 ip6optlen += CMSG_SPACE(sizeof(int)); 763 764 #ifdef IPV6_REACHCONF 765 if (options & F_REACHCONF) 766 ip6optlen += CMSG_SPACE(0); 767 #endif 768 769 /* set IP6 packet options */ 770 if (ip6optlen) { 771 if ((scmsg = (char *)malloc(ip6optlen)) == 0) 772 errx(1, "can't allocate enough memory"); 773 smsghdr.msg_control = (caddr_t)scmsg; 774 smsghdr.msg_controllen = ip6optlen; 775 scmsgp = (struct cmsghdr *)scmsg; 776 } 777 if (usepktinfo) { 778 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); 779 memset(pktinfo, 0, sizeof(*pktinfo)); 780 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 781 scmsgp->cmsg_level = IPPROTO_IPV6; 782 scmsgp->cmsg_type = IPV6_PKTINFO; 783 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 784 } 785 786 /* set the outgoing interface */ 787 if (ifname) { 788 #ifndef USE_SIN6_SCOPE_ID 789 /* pktinfo must have already been allocated */ 790 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0) 791 errx(1, "%s: invalid interface name", ifname); 792 #else 793 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 794 errx(1, "%s: invalid interface name", ifname); 795 #endif 796 } 797 /* set the source address */ 798 if (options & F_SRCADDR)/* pktinfo must be valid */ 799 pktinfo->ipi6_addr = srcaddr; 800 801 if (hoplimit != -1) { 802 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 803 scmsgp->cmsg_level = IPPROTO_IPV6; 804 scmsgp->cmsg_type = IPV6_HOPLIMIT; 805 *(int *)(CMSG_DATA(scmsgp)) = hoplimit; 806 807 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 808 } 809 #ifdef IPV6_REACHCONF 810 if (options & F_REACHCONF) { 811 scmsgp->cmsg_len = CMSG_LEN(0); 812 scmsgp->cmsg_level = IPPROTO_IPV6; 813 scmsgp->cmsg_type = IPV6_REACHCONF; 814 815 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 816 } 817 #endif 818 819 if (argc > 1) { /* some intermediate addrs are specified */ 820 int hops, error; 821 #ifdef USE_RFC2292BIS 822 int rthdrlen; 823 #endif 824 825 #ifdef USE_RFC2292BIS 826 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 827 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 828 scmsgp->cmsg_level = IPPROTO_IPV6; 829 scmsgp->cmsg_type = IPV6_RTHDR; 830 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 831 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 832 IPV6_RTHDR_TYPE_0, argc - 1); 833 if (rthdr == NULL) 834 errx(1, "can't initialize rthdr"); 835 #else /* old advanced API */ 836 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp, 837 IPV6_RTHDR_TYPE_0)) == 0) 838 errx(1, "can't initialize rthdr"); 839 #endif /* USE_RFC2292BIS */ 840 841 for (hops = 0; hops < argc - 1; hops++) { 842 struct addrinfo *iaip; 843 844 if ((error = getaddrinfo(argv[hops], NULL, &hints, 845 &iaip))) 846 errx(1, "%s", gai_strerror(error)); 847 if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6) 848 errx(1, 849 "bad addr family of an intermediate addr"); 850 851 #ifdef USE_RFC2292BIS 852 if (inet6_rth_add(rthdr, 853 &(SIN6(iaip->ai_addr))->sin6_addr)) 854 errx(1, "can't add an intermediate node"); 855 #else /* old advanced API */ 856 if (inet6_rthdr_add(scmsgp, 857 &(SIN6(iaip->ai_addr))->sin6_addr, 858 IPV6_RTHDR_LOOSE)) 859 errx(1, "can't add an intermediate node"); 860 #endif /* USE_RFC2292BIS */ 861 freeaddrinfo(iaip); 862 } 863 864 #ifndef USE_RFC2292BIS 865 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE)) 866 errx(1, "can't set the last flag"); 867 #endif 868 869 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 870 } 871 872 { 873 /* 874 * source selection 875 */ 876 int dummy, len = sizeof(src); 877 878 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 879 err(1, "UDP socket"); 880 881 src.sin6_family = AF_INET6; 882 src.sin6_addr = dst.sin6_addr; 883 src.sin6_port = ntohs(DUMMY_PORT); 884 src.sin6_scope_id = dst.sin6_scope_id; 885 886 #ifdef USE_RFC2292BIS 887 if (pktinfo && 888 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 889 (void *)pktinfo, sizeof(*pktinfo))) 890 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 891 892 if (hoplimit != -1 && 893 setsockopt(dummy, IPPROTO_IPV6, IPV6_HOPLIMIT, 894 (void *)&hoplimit, sizeof(hoplimit))) 895 err(1, "UDP setsockopt(IPV6_HOPLIMIT)"); 896 897 if (rthdr && 898 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 899 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 900 err(1, "UDP setsockopt(IPV6_RTHDR)"); 901 #else /* old advanced API */ 902 if (smsghdr.msg_control && 903 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS, 904 (void *)smsghdr.msg_control, smsghdr.msg_controllen)) 905 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)"); 906 #endif 907 908 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 909 err(1, "UDP connect"); 910 911 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 912 err(1, "getsockname"); 913 914 close(dummy); 915 } 916 917 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 918 if (sockbufsize) { 919 if (datalen > sockbufsize) 920 warnx("you need -b to increase socket buffer size"); 921 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 922 sizeof(sockbufsize)) < 0) 923 err(1, "setsockopt(SO_SNDBUF)"); 924 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 925 sizeof(sockbufsize)) < 0) 926 err(1, "setsockopt(SO_RCVBUF)"); 927 } 928 else { 929 if (datalen > 8 * 1024) /*XXX*/ 930 warnx("you need -b to increase socket buffer size"); 931 /* 932 * When pinging the broadcast address, you can get a lot of 933 * answers. Doing something so evil is useful if you are trying 934 * to stress the ethernet, or just want to fill the arp cache 935 * to get some stuff for /etc/ethers. 936 */ 937 hold = 48 * 1024; 938 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 939 sizeof(hold)); 940 } 941 #endif 942 943 optval = 1; 944 #ifndef USE_SIN6_SCOPE_ID 945 #ifdef IPV6_RECVPKTINFO 946 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 947 sizeof(optval)) < 0) 948 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 949 #else /* old adv. API */ 950 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 951 sizeof(optval)) < 0) 952 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 953 #endif 954 #endif /* USE_SIN6_SCOPE_ID */ 955 #ifdef IPV6_RECVHOPLIMIT 956 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 957 sizeof(optval)) < 0) 958 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 959 #else /* old adv. API */ 960 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 961 sizeof(optval)) < 0) 962 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 963 #endif 964 965 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 966 (unsigned long)(pingerlen() - 8)); 967 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 968 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 969 970 while (preload--) /* Fire off them quickies. */ 971 (void)pinger(); 972 973 (void)signal(SIGINT, onsignal); 974 #ifdef SIGINFO 975 (void)signal(SIGINFO, onsignal); 976 #endif 977 978 if ((options & F_FLOOD) == 0) { 979 (void)signal(SIGALRM, onsignal); 980 itimer.it_interval = interval; 981 itimer.it_value = interval; 982 (void)setitimer(ITIMER_REAL, &itimer, NULL); 983 if (ntransmitted == 0) 984 retransmit(); 985 } 986 987 fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask); 988 if ((fdmaskp = malloc(fdmasks)) == NULL) 989 err(1, "malloc"); 990 991 signo = seenalrm = seenint = 0; 992 #ifdef SIGINFO 993 seeninfo = 0; 994 #endif 995 996 for (;;) { 997 struct msghdr m; 998 struct cmsghdr *cm; 999 u_char buf[1024]; 1000 struct iovec iov[2]; 1001 1002 /* signal handling */ 1003 if (seenalrm) { 1004 retransmit(); 1005 seenalrm = 0; 1006 continue; 1007 } 1008 if (seenint) { 1009 onint(SIGINT); 1010 seenint = 0; 1011 continue; 1012 } 1013 #ifdef SIGINFO 1014 if (seeninfo) { 1015 summary(); 1016 seeninfo = 0; 1017 continue; 1018 } 1019 #endif 1020 1021 if (options & F_FLOOD) { 1022 (void)pinger(); 1023 timeout.tv_sec = 0; 1024 timeout.tv_usec = 10000; 1025 tv = &timeout; 1026 } else 1027 tv = NULL; 1028 memset(fdmaskp, 0, fdmasks); 1029 FD_SET(s, fdmaskp); 1030 cc = select(s + 1, fdmaskp, NULL, NULL, tv); 1031 if (cc < 0) { 1032 if (errno != EINTR) { 1033 warn("select"); 1034 sleep(1); 1035 } 1036 continue; 1037 } else if (cc == 0) 1038 continue; 1039 1040 fromlen = sizeof(from); 1041 m.msg_name = (caddr_t)&from; 1042 m.msg_namelen = sizeof(from); 1043 memset(&iov, 0, sizeof(iov)); 1044 iov[0].iov_base = (caddr_t)packet; 1045 iov[0].iov_len = packlen; 1046 m.msg_iov = iov; 1047 m.msg_iovlen = 1; 1048 cm = (struct cmsghdr *)buf; 1049 m.msg_control = (caddr_t)buf; 1050 m.msg_controllen = sizeof(buf); 1051 1052 cc = recvmsg(s, &m, 0); 1053 if (cc < 0) { 1054 if (errno != EINTR) { 1055 warn("recvmsg"); 1056 sleep(1); 1057 } 1058 continue; 1059 } else if (cc == 0) { 1060 int mtu; 1061 1062 /* 1063 * receive control messages only. Process the 1064 * exceptions (currently the only possiblity is 1065 * a path MTU notification.) 1066 */ 1067 if ((mtu = get_pathmtu(&m)) > 0) { 1068 if ((options & F_VERBOSE) != 0) { 1069 printf("new path MTU (%d) is " 1070 "notified\n", mtu); 1071 } 1072 set_pathmtu(mtu); 1073 } 1074 continue; 1075 } else { 1076 /* 1077 * an ICMPv6 message (probably an echoreply) arrived. 1078 */ 1079 pr_pack(packet, cc, &m); 1080 } 1081 if (npackets && nreceived >= npackets) 1082 break; 1083 } 1084 summary(); 1085 exit(nreceived == 0); 1086 } 1087 1088 void 1089 onsignal(int sig) 1090 { 1091 signo = sig; 1092 switch (sig) { 1093 case SIGALRM: 1094 seenalrm++; 1095 break; 1096 case SIGINT: 1097 seenint++; 1098 break; 1099 #ifdef SIGINFO 1100 case SIGINFO: 1101 seeninfo++; 1102 break; 1103 #endif 1104 } 1105 } 1106 1107 /* 1108 * retransmit -- 1109 * This routine transmits another ping6. 1110 */ 1111 void 1112 retransmit(void) 1113 { 1114 struct itimerval itimer; 1115 1116 if (pinger() == 0) 1117 return; 1118 1119 /* 1120 * If we're not transmitting any more packets, change the timer 1121 * to wait two round-trip times if we've received any packets or 1122 * ten seconds if we haven't. 1123 */ 1124 #define MAXWAIT 10 1125 if (nreceived) { 1126 itimer.it_value.tv_sec = 2 * tmax / 1000; 1127 if (itimer.it_value.tv_sec == 0) 1128 itimer.it_value.tv_sec = 1; 1129 } else 1130 itimer.it_value.tv_sec = MAXWAIT; 1131 itimer.it_interval.tv_sec = 0; 1132 itimer.it_interval.tv_usec = 0; 1133 itimer.it_value.tv_usec = 0; 1134 1135 (void)signal(SIGALRM, onint); 1136 (void)setitimer(ITIMER_REAL, &itimer, NULL); 1137 } 1138 1139 /* 1140 * pinger -- 1141 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1142 * will be added on by the kernel. The ID field is our UNIX process ID, 1143 * and the sequence number is an ascending integer. The first 8 bytes 1144 * of the data portion are used to hold a UNIX "timeval" struct in VAX 1145 * byte-order, to compute the round-trip time. 1146 */ 1147 size_t 1148 pingerlen(void) 1149 { 1150 size_t l; 1151 1152 if (options & F_FQDN) 1153 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1154 else if (options & F_FQDNOLD) 1155 l = ICMP6_NIQLEN; 1156 else if (options & F_NODEADDR) 1157 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1158 else if (options & F_SUPTYPES) 1159 l = ICMP6_NIQLEN; 1160 else 1161 l = ICMP6ECHOLEN + datalen; 1162 1163 return l; 1164 } 1165 1166 int 1167 pinger(void) 1168 { 1169 struct icmp6_hdr *icp; 1170 struct iovec iov[2]; 1171 int i, cc; 1172 struct icmp6_nodeinfo *nip; 1173 int seq; 1174 1175 if (npackets && ntransmitted >= npackets) 1176 return(-1); /* no more transmission */ 1177 1178 icp = (struct icmp6_hdr *)outpack; 1179 nip = (struct icmp6_nodeinfo *)outpack; 1180 memset(icp, 0, sizeof(*icp)); 1181 icp->icmp6_cksum = 0; 1182 seq = ntransmitted++; 1183 CLR(seq % mx_dup_ck); 1184 1185 if (options & F_FQDN) { 1186 icp->icmp6_type = ICMP6_NI_QUERY; 1187 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1188 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1189 nip->ni_flags = htons(0); 1190 1191 memcpy(nip->icmp6_ni_nonce, nonce, 1192 sizeof(nip->icmp6_ni_nonce)); 1193 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1194 1195 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1196 sizeof(dst.sin6_addr)); 1197 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1198 datalen = 0; 1199 } else if (options & F_FQDNOLD) { 1200 /* packet format in 03 draft - no Subject data on queries */ 1201 icp->icmp6_type = ICMP6_NI_QUERY; 1202 icp->icmp6_code = 0; /* code field is always 0 */ 1203 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1204 nip->ni_flags = htons(0); 1205 1206 memcpy(nip->icmp6_ni_nonce, nonce, 1207 sizeof(nip->icmp6_ni_nonce)); 1208 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1209 1210 cc = ICMP6_NIQLEN; 1211 datalen = 0; 1212 } else if (options & F_NODEADDR) { 1213 icp->icmp6_type = ICMP6_NI_QUERY; 1214 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1215 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1216 nip->ni_flags = naflags; 1217 1218 memcpy(nip->icmp6_ni_nonce, nonce, 1219 sizeof(nip->icmp6_ni_nonce)); 1220 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1221 1222 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1223 sizeof(dst.sin6_addr)); 1224 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1225 datalen = 0; 1226 } else if (options & F_SUPTYPES) { 1227 icp->icmp6_type = ICMP6_NI_QUERY; 1228 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1229 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1230 /* we support compressed bitmap */ 1231 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1232 1233 memcpy(nip->icmp6_ni_nonce, nonce, 1234 sizeof(nip->icmp6_ni_nonce)); 1235 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1236 cc = ICMP6_NIQLEN; 1237 datalen = 0; 1238 } else { 1239 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1240 icp->icmp6_code = 0; 1241 icp->icmp6_id = htons(ident); 1242 icp->icmp6_seq = ntohs(seq); 1243 if (timing) 1244 (void)gettimeofday((struct timeval *) 1245 &outpack[ICMP6ECHOLEN], NULL); 1246 cc = ICMP6ECHOLEN + datalen; 1247 } 1248 1249 #ifdef DIAGNOSTIC 1250 if (pingerlen() != cc) 1251 errx(1, "internal error; length mismatch"); 1252 #endif 1253 1254 smsghdr.msg_name = (caddr_t)&dst; 1255 smsghdr.msg_namelen = sizeof(dst); 1256 memset(&iov, 0, sizeof(iov)); 1257 iov[0].iov_base = (caddr_t)outpack; 1258 iov[0].iov_len = cc; 1259 smsghdr.msg_iov = iov; 1260 smsghdr.msg_iovlen = 1; 1261 1262 i = sendmsg(s, &smsghdr, 0); 1263 1264 if (i < 0 || i != cc) { 1265 if (i < 0) 1266 warn("sendmsg"); 1267 (void)printf("ping6: wrote %s %d chars, ret=%d\n", 1268 hostname, cc, i); 1269 } 1270 if (!(options & F_QUIET) && options & F_FLOOD) 1271 (void)write(STDOUT_FILENO, &DOT, 1); 1272 1273 return(0); 1274 } 1275 1276 int 1277 myechoreply(const struct icmp6_hdr *icp) 1278 { 1279 if (ntohs(icp->icmp6_id) == ident) 1280 return 1; 1281 else 1282 return 0; 1283 } 1284 1285 int 1286 mynireply(const struct icmp6_nodeinfo *nip) 1287 { 1288 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1289 nonce + sizeof(u_int16_t), 1290 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1291 return 1; 1292 else 1293 return 0; 1294 } 1295 1296 char * 1297 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, u_char *buf, 1298 size_t bufsiz) 1299 { 1300 int i; 1301 const u_char *cp; 1302 char cresult[MAXDNAME + 1]; 1303 const u_char *comp; 1304 int l; 1305 1306 cp = *sp; 1307 *buf = '\0'; 1308 1309 if (cp >= ep) 1310 return NULL; 1311 while (cp < ep) { 1312 i = *cp; 1313 if (i == 0 || cp != *sp) { 1314 if (strlcat(buf, ".", bufsiz) >= bufsiz) 1315 return NULL; /*result overrun*/ 1316 } 1317 if (i == 0) 1318 break; 1319 cp++; 1320 1321 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1322 /* DNS compression */ 1323 if (!base) 1324 return NULL; 1325 1326 comp = base + (i & 0x3f); 1327 if (dnsdecode(&comp, cp, base, cresult, 1328 sizeof(cresult)) == NULL) 1329 return NULL; 1330 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1331 return NULL; /*result overrun*/ 1332 break; 1333 } else if ((i & 0x3f) == i) { 1334 if (i > ep - cp) 1335 return NULL; /*source overrun*/ 1336 while (i-- > 0 && cp < ep) { 1337 l = snprintf(cresult, sizeof(cresult), 1338 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1339 if (l >= sizeof(cresult)) 1340 return NULL; 1341 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1342 return NULL; /*result overrun*/ 1343 cp++; 1344 } 1345 } else 1346 return NULL; /*invalid label*/ 1347 } 1348 if (i != 0) 1349 return NULL; /*not terminated*/ 1350 cp++; 1351 *sp = cp; 1352 return buf; 1353 } 1354 1355 /* 1356 * pr_pack -- 1357 * Print out the packet, if it came from us. This logic is necessary 1358 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1359 * which arrive ('tis only fair). This permits multiple copies of this 1360 * program to be run without having intermingled output (or statistics!). 1361 */ 1362 void 1363 pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1364 { 1365 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1366 struct icmp6_hdr *icp; 1367 struct icmp6_nodeinfo *ni; 1368 int i; 1369 int hoplim; 1370 struct sockaddr *from; 1371 int fromlen; 1372 u_char *cp = NULL, *dp, *end = buf + cc; 1373 struct in6_pktinfo *pktinfo = NULL; 1374 struct timeval tv, *tp; 1375 double triptime = 0; 1376 int dupflag; 1377 size_t off; 1378 int oldfqdn; 1379 u_int16_t seq; 1380 char dnsname[MAXDNAME + 1]; 1381 1382 (void)gettimeofday(&tv, NULL); 1383 1384 if (!mhdr || !mhdr->msg_name || 1385 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1386 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1387 if (options & F_VERBOSE) 1388 warnx("invalid peername\n"); 1389 return; 1390 } 1391 from = (struct sockaddr *)mhdr->msg_name; 1392 fromlen = mhdr->msg_namelen; 1393 if (cc < sizeof(struct icmp6_hdr)) { 1394 if (options & F_VERBOSE) 1395 warnx("packet too short (%d bytes) from %s\n", cc, 1396 pr_addr(from, fromlen)); 1397 return; 1398 } 1399 icp = (struct icmp6_hdr *)buf; 1400 ni = (struct icmp6_nodeinfo *)buf; 1401 off = 0; 1402 1403 if ((hoplim = get_hoplim(mhdr)) == -1) { 1404 warnx("failed to get receiving hop limit"); 1405 return; 1406 } 1407 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1408 warnx("failed to get receiving pakcet information"); 1409 return; 1410 } 1411 1412 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1413 seq = ntohs(icp->icmp6_seq); 1414 ++nreceived; 1415 if (timing) { 1416 tp = (struct timeval *)(icp + 1); 1417 tvsub(&tv, tp); 1418 triptime = ((double)tv.tv_sec) * 1000.0 + 1419 ((double)tv.tv_usec) / 1000.0; 1420 tsum += triptime; 1421 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) 1422 tsumsq += triptime * triptime; 1423 #endif 1424 if (triptime < tmin) 1425 tmin = triptime; 1426 if (triptime > tmax) 1427 tmax = triptime; 1428 } 1429 1430 if (TST(seq % mx_dup_ck)) { 1431 ++nrepeats; 1432 --nreceived; 1433 dupflag = 1; 1434 } else { 1435 SET(seq % mx_dup_ck); 1436 dupflag = 0; 1437 } 1438 1439 if (options & F_QUIET) 1440 return; 1441 1442 if (options & F_FLOOD) 1443 (void)write(STDOUT_FILENO, &BSPACE, 1); 1444 else { 1445 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1446 pr_addr(from, fromlen), seq); 1447 (void)printf(" hlim=%d", hoplim); 1448 if ((options & F_VERBOSE) != 0) { 1449 struct sockaddr_in6 dstsa; 1450 1451 memset(&dstsa, 0, sizeof(dstsa)); 1452 dstsa.sin6_family = AF_INET6; 1453 #ifdef SIN6_LEN 1454 dstsa.sin6_len = sizeof(dstsa); 1455 #endif 1456 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1457 dstsa.sin6_addr = pktinfo->ipi6_addr; 1458 (void)printf(" dst=%s", 1459 pr_addr((struct sockaddr *)&dstsa, 1460 sizeof(dstsa))); 1461 } 1462 if (timing) 1463 (void)printf(" time=%g ms", triptime); 1464 if (dupflag) 1465 (void)printf("(DUP!)"); 1466 /* check the data */ 1467 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1468 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1469 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1470 if (*cp != *dp) { 1471 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1472 break; 1473 } 1474 } 1475 } 1476 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1477 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce); 1478 ++nreceived; 1479 if (TST(seq % mx_dup_ck)) { 1480 ++nrepeats; 1481 --nreceived; 1482 dupflag = 1; 1483 } else { 1484 SET(seq % mx_dup_ck); 1485 dupflag = 0; 1486 } 1487 1488 if (options & F_QUIET) 1489 return; 1490 1491 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1492 1493 switch (ntohs(ni->ni_code)) { 1494 case ICMP6_NI_SUCCESS: 1495 break; 1496 case ICMP6_NI_REFUSED: 1497 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1498 goto fqdnend; 1499 case ICMP6_NI_UNKNOWN: 1500 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1501 goto fqdnend; 1502 default: 1503 printf("unknown code 0x%x, type 0x%x", 1504 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1505 goto fqdnend; 1506 } 1507 1508 switch (ntohs(ni->ni_qtype)) { 1509 case NI_QTYPE_NOOP: 1510 printf("NodeInfo NOOP"); 1511 break; 1512 case NI_QTYPE_SUPTYPES: 1513 pr_suptypes(ni, end - (u_char *)ni); 1514 break; 1515 case NI_QTYPE_NODEADDR: 1516 pr_nodeaddr(ni, end - (u_char *)ni); 1517 break; 1518 case NI_QTYPE_FQDN: 1519 default: /* XXX: for backward compatibility */ 1520 cp = (u_char *)ni + ICMP6_NIRLEN; 1521 if (buf[off + ICMP6_NIRLEN] == 1522 cc - off - ICMP6_NIRLEN - 1) 1523 oldfqdn = 1; 1524 else 1525 oldfqdn = 0; 1526 if (oldfqdn) { 1527 cp++; /* skip length */ 1528 while (cp < end) { 1529 safeputc(*cp & 0xff); 1530 cp++; 1531 } 1532 } else { 1533 i = 0; 1534 while (cp < end) { 1535 if (dnsdecode((const u_char **)&cp, end, 1536 (const u_char *)(ni + 1), dnsname, 1537 sizeof(dnsname)) == NULL) { 1538 printf("???"); 1539 break; 1540 } 1541 /* 1542 * name-lookup special handling for 1543 * truncated name 1544 */ 1545 if (cp + 1 <= end && !*cp && 1546 strlen(dnsname) > 0) { 1547 dnsname[strlen(dnsname) - 1] = '\0'; 1548 cp++; 1549 } 1550 printf("%s%s", i > 0 ? "," : "", 1551 dnsname); 1552 } 1553 } 1554 if (options & F_VERBOSE) { 1555 int32_t ttl; 1556 int comma = 0; 1557 1558 (void)printf(" ("); /*)*/ 1559 1560 switch (ni->ni_code) { 1561 case ICMP6_NI_REFUSED: 1562 (void)printf("refused"); 1563 comma++; 1564 break; 1565 case ICMP6_NI_UNKNOWN: 1566 (void)printf("unknwon qtype"); 1567 comma++; 1568 break; 1569 } 1570 1571 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1572 /* case of refusion, unknown */ 1573 /*(*/ 1574 putchar(')'); 1575 goto fqdnend; 1576 } 1577 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]); 1578 if (comma) 1579 printf(","); 1580 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1581 (void)printf("TTL=%d:meaningless", 1582 (int)ttl); 1583 } else { 1584 if (ttl < 0) { 1585 (void)printf("TTL=%d:invalid", 1586 ttl); 1587 } else 1588 (void)printf("TTL=%d", ttl); 1589 } 1590 comma++; 1591 1592 if (oldfqdn) { 1593 if (comma) 1594 printf(","); 1595 printf("03 draft"); 1596 comma++; 1597 } else { 1598 cp = (u_char *)ni + ICMP6_NIRLEN; 1599 if (cp == end) { 1600 if (comma) 1601 printf(","); 1602 printf("no name"); 1603 comma++; 1604 } 1605 } 1606 1607 if (buf[off + ICMP6_NIRLEN] != 1608 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1609 if (comma) 1610 printf(","); 1611 (void)printf("invalid namelen:%d/%lu", 1612 buf[off + ICMP6_NIRLEN], 1613 (u_long)cc - off - ICMP6_NIRLEN - 1); 1614 comma++; 1615 } 1616 /*(*/ 1617 putchar(')'); 1618 } 1619 fqdnend: 1620 ; 1621 } 1622 } else { 1623 /* We've got something other than an ECHOREPLY */ 1624 if (!(options & F_VERBOSE)) 1625 return; 1626 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1627 pr_icmph(icp, end); 1628 } 1629 1630 if (!(options & F_FLOOD)) { 1631 (void)putchar('\n'); 1632 if (options & F_VERBOSE) 1633 pr_exthdrs(mhdr); 1634 (void)fflush(stdout); 1635 } 1636 #undef safeputc 1637 } 1638 1639 void 1640 pr_exthdrs(struct msghdr *mhdr) 1641 { 1642 struct cmsghdr *cm; 1643 1644 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1645 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1646 if (cm->cmsg_level != IPPROTO_IPV6) 1647 continue; 1648 1649 switch (cm->cmsg_type) { 1650 case IPV6_HOPOPTS: 1651 printf(" HbH Options: "); 1652 pr_ip6opt(CMSG_DATA(cm)); 1653 break; 1654 case IPV6_DSTOPTS: 1655 #ifdef IPV6_RTHDRDSTOPTS 1656 case IPV6_RTHDRDSTOPTS: 1657 #endif 1658 printf(" Dst Options: "); 1659 pr_ip6opt(CMSG_DATA(cm)); 1660 break; 1661 case IPV6_RTHDR: 1662 printf(" Routing: "); 1663 pr_rthdr(CMSG_DATA(cm)); 1664 break; 1665 } 1666 } 1667 } 1668 1669 #ifdef USE_RFC2292BIS 1670 void 1671 pr_ip6opt(void *extbuf) 1672 { 1673 struct ip6_hbh *ext; 1674 int currentlen; 1675 u_int8_t type; 1676 size_t extlen, len; 1677 void *databuf; 1678 size_t offset; 1679 u_int16_t value2; 1680 u_int32_t value4; 1681 1682 ext = (struct ip6_hbh *)extbuf; 1683 extlen = (ext->ip6h_len + 1) * 8; 1684 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1685 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1686 1687 currentlen = 0; 1688 while (1) { 1689 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1690 &type, &len, &databuf); 1691 if (currentlen == -1) 1692 break; 1693 switch (type) { 1694 /* 1695 * Note that inet6_opt_next automatically skips any padding 1696 * optins. 1697 */ 1698 case IP6OPT_JUMBO: 1699 offset = 0; 1700 offset = inet6_opt_get_val(databuf, offset, 1701 &value4, sizeof(value4)); 1702 printf(" Jumbo Payload Opt: Length %u\n", 1703 (u_int32_t)ntohl(value4)); 1704 break; 1705 case IP6OPT_ROUTER_ALERT: 1706 offset = 0; 1707 offset = inet6_opt_get_val(databuf, offset, 1708 &value2, sizeof(value2)); 1709 printf(" Router Alert Opt: Type %u\n", 1710 ntohs(value2)); 1711 break; 1712 default: 1713 printf(" Received Opt %u len %lu\n", 1714 type, (unsigned long)len); 1715 break; 1716 } 1717 } 1718 return; 1719 } 1720 #else /* !USE_RFC2292BIS */ 1721 /* ARGSUSED */ 1722 void 1723 pr_ip6opt(void *extbuf) 1724 { 1725 putchar('\n'); 1726 return; 1727 } 1728 #endif /* USE_RFC2292BIS */ 1729 1730 #ifdef USE_RFC2292BIS 1731 void 1732 pr_rthdr(void *extbuf) 1733 { 1734 struct in6_addr *in6; 1735 char ntopbuf[INET6_ADDRSTRLEN]; 1736 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1737 int i, segments; 1738 1739 /* print fixed part of the header */ 1740 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1741 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1742 if ((segments = inet6_rth_segments(extbuf)) >= 0) 1743 printf("%d segments, ", segments); 1744 else 1745 printf("segments unknown, "); 1746 printf("%d left\n", rh->ip6r_segleft); 1747 1748 for (i = 0; i < segments; i++) { 1749 in6 = inet6_rth_getaddr(extbuf, i); 1750 if (in6 == NULL) 1751 printf(" [%d]<NULL>\n", i); 1752 else { 1753 if (!inet_ntop(AF_INET6, in6, ntopbuf, 1754 sizeof(ntopbuf))) 1755 strncpy(ntopbuf, "?", sizeof(ntopbuf)); 1756 printf(" [%d]%s\n", i, ntopbuf); 1757 } 1758 } 1759 1760 return; 1761 1762 } 1763 1764 #else /* !USE_RFC2292BIS */ 1765 /* ARGSUSED */ 1766 void 1767 pr_rthdr(void *extbuf) 1768 { 1769 putchar('\n'); 1770 return; 1771 } 1772 #endif /* USE_RFC2292BIS */ 1773 1774 int 1775 pr_bitrange(u_int32_t v, int s, int ii) 1776 { 1777 int off; 1778 int i; 1779 1780 off = 0; 1781 while (off < 32) { 1782 /* shift till we have 0x01 */ 1783 if ((v & 0x01) == 0) { 1784 if (ii > 1) 1785 printf("-%u", s + off - 1); 1786 ii = 0; 1787 switch (v & 0x0f) { 1788 case 0x00: 1789 v >>= 4; 1790 off += 4; 1791 continue; 1792 case 0x08: 1793 v >>= 3; 1794 off += 3; 1795 continue; 1796 case 0x04: case 0x0c: 1797 v >>= 2; 1798 off += 2; 1799 continue; 1800 default: 1801 v >>= 1; 1802 off += 1; 1803 continue; 1804 } 1805 } 1806 1807 /* we have 0x01 with us */ 1808 for (i = 0; i < 32 - off; i++) { 1809 if ((v & (0x01 << i)) == 0) 1810 break; 1811 } 1812 if (!ii) 1813 printf(" %u", s + off); 1814 ii += i; 1815 v >>= i; off += i; 1816 } 1817 return ii; 1818 } 1819 1820 /* struct icmp6_nodeinfo *ni: ni->qtype must be SUPTYPES */ 1821 void 1822 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 1823 { 1824 size_t clen; 1825 u_int32_t v; 1826 const u_char *cp, *end; 1827 u_int16_t cur; 1828 struct cbit { 1829 u_int16_t words; /*32bit count*/ 1830 u_int16_t skip; 1831 } cbit; 1832 #define MAXQTYPES (1 << 16) 1833 size_t off; 1834 int b; 1835 1836 cp = (u_char *)(ni + 1); 1837 end = ((u_char *)ni) + nilen; 1838 cur = 0; 1839 b = 0; 1840 1841 printf("NodeInfo Supported Qtypes"); 1842 if (options & F_VERBOSE) { 1843 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 1844 printf(", compressed bitmap"); 1845 else 1846 printf(", raw bitmap"); 1847 } 1848 1849 while (cp < end) { 1850 clen = (size_t)(end - cp); 1851 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 1852 if (clen == 0 || clen > MAXQTYPES / 8 || 1853 clen % sizeof(v)) { 1854 printf("???"); 1855 return; 1856 } 1857 } else { 1858 if (clen < sizeof(cbit) || clen % sizeof(v)) 1859 return; 1860 memcpy(&cbit, cp, sizeof(cbit)); 1861 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 1862 clen) 1863 return; 1864 cp += sizeof(cbit); 1865 clen = ntohs(cbit.words) * sizeof(v); 1866 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 1867 MAXQTYPES) 1868 return; 1869 } 1870 1871 for (off = 0; off < clen; off += sizeof(v)) { 1872 memcpy(&v, cp + off, sizeof(v)); 1873 v = (u_int32_t)ntohl(v); 1874 b = pr_bitrange(v, (int)(cur + off * 8), b); 1875 } 1876 /* flush the remaining bits */ 1877 b = pr_bitrange(0, (int)(cur + off * 8), b); 1878 1879 cp += clen; 1880 cur += clen * 8; 1881 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 1882 cur += ntohs(cbit.skip) * 32; 1883 } 1884 } 1885 1886 /* struct icmp6_nodeinfo *ni: ni->qtype must be NODEADDR */ 1887 void 1888 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 1889 { 1890 u_char *cp = (u_char *)(ni + 1); 1891 char ntop_buf[INET6_ADDRSTRLEN]; 1892 int withttl = 0; 1893 1894 nilen -= sizeof(struct icmp6_nodeinfo); 1895 1896 if (options & F_VERBOSE) { 1897 switch (ni->ni_code) { 1898 case ICMP6_NI_REFUSED: 1899 (void)printf("refused"); 1900 break; 1901 case ICMP6_NI_UNKNOWN: 1902 (void)printf("unknown qtype"); 1903 break; 1904 } 1905 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 1906 (void)printf(" truncated"); 1907 } 1908 putchar('\n'); 1909 if (nilen <= 0) 1910 printf(" no address\n"); 1911 1912 /* 1913 * In icmp-name-lookups 05 and later, TTL of each returned address 1914 * is contained in the resposne. We try to detect the version 1915 * by the length of the data, but note that the detection algorithm 1916 * is incomplete. We assume the latest draft by default. 1917 */ 1918 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 1919 withttl = 1; 1920 while (nilen > 0) { 1921 u_int32_t ttl; 1922 1923 if (withttl) { 1924 /* XXX: alignment? */ 1925 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp); 1926 cp += sizeof(u_int32_t); 1927 nilen -= sizeof(u_int32_t); 1928 } 1929 1930 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 1931 NULL) 1932 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 1933 printf(" %s", ntop_buf); 1934 if (withttl) { 1935 if (ttl == 0xffffffff) { 1936 /* 1937 * XXX: can this convention be applied to all 1938 * type of TTL (i.e. non-ND TTL)? 1939 */ 1940 printf("(TTL=infty)"); 1941 } 1942 else 1943 printf("(TTL=%u)", ttl); 1944 } 1945 putchar('\n'); 1946 1947 nilen -= sizeof(struct in6_addr); 1948 cp += sizeof(struct in6_addr); 1949 } 1950 } 1951 1952 int 1953 get_hoplim(struct msghdr *mhdr) 1954 { 1955 struct cmsghdr *cm; 1956 1957 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1958 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1959 if (cm->cmsg_len == 0) 1960 return(-1); 1961 1962 if (cm->cmsg_level == IPPROTO_IPV6 && 1963 cm->cmsg_type == IPV6_HOPLIMIT && 1964 cm->cmsg_len == CMSG_LEN(sizeof(int))) 1965 return(*(int *)CMSG_DATA(cm)); 1966 } 1967 1968 return(-1); 1969 } 1970 1971 struct in6_pktinfo * 1972 get_rcvpktinfo(struct msghdr *mhdr) 1973 { 1974 struct cmsghdr *cm; 1975 1976 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1977 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1978 if (cm->cmsg_len == 0) 1979 return(NULL); 1980 1981 if (cm->cmsg_level == IPPROTO_IPV6 && 1982 cm->cmsg_type == IPV6_PKTINFO && 1983 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) 1984 return((struct in6_pktinfo *)CMSG_DATA(cm)); 1985 } 1986 1987 return(NULL); 1988 } 1989 1990 int 1991 get_pathmtu(struct msghdr *mhdr) 1992 { 1993 #ifdef IPV6_RECVPATHMTU 1994 struct cmsghdr *cm; 1995 struct ip6_mtuinfo *mtuctl = NULL; 1996 1997 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1998 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1999 if (cm->cmsg_len == 0) 2000 return(0); 2001 2002 if (cm->cmsg_level == IPPROTO_IPV6 && 2003 cm->cmsg_type == IPV6_PATHMTU && 2004 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2005 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm); 2006 2007 /* 2008 * If the notified destination is different from 2009 * the one we are pinging, just ignore the info. 2010 * We check the scope ID only when both notified value 2011 * and our own value have non-0 values, because we may 2012 * have used the default scope zone ID for sending, 2013 * in which case the scope ID value is 0. 2014 */ 2015 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr, 2016 &dst.sin6_addr) || 2017 (mtuctl->ip6m_addr.sin6_scope_id && 2018 dst.sin6_scope_id && 2019 mtuctl->ip6m_addr.sin6_scope_id != 2020 dst.sin6_scope_id)) { 2021 if ((options & F_VERBOSE) != 0) { 2022 printf("path MTU for %s is notified. " 2023 "(ignored)\n", 2024 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr, 2025 sizeof(mtuctl->ip6m_addr))); 2026 } 2027 return(0); 2028 } 2029 2030 /* 2031 * Ignore an invalid MTU. XXX: can we just believe 2032 * the kernel check? 2033 */ 2034 if (mtuctl->ip6m_mtu < IPV6_MMTU) 2035 return(0); 2036 2037 /* notification for our destination. return the MTU. */ 2038 return((int)mtuctl->ip6m_mtu); 2039 } 2040 } 2041 #endif 2042 return(0); 2043 } 2044 2045 void 2046 set_pathmtu(int mtu) 2047 { 2048 #ifdef IPV6_USE_MTU 2049 static int firsttime = 1; 2050 struct cmsghdr *cm; 2051 2052 if (firsttime) { 2053 int oldlen = smsghdr.msg_controllen; 2054 char *oldbuf = smsghdr.msg_control; 2055 2056 /* XXX: We need to enlarge control message buffer */ 2057 firsttime = 0; /* prevent further enlargement */ 2058 2059 smsghdr.msg_controllen = oldlen + CMSG_SPACE(sizeof(int)); 2060 if ((smsghdr.msg_control = 2061 (char *)malloc(smsghdr.msg_controllen)) == NULL) 2062 err(1, "set_pathmtu: malloc"); 2063 cm = (struct cmsghdr *)CMSG_FIRSTHDR(&smsghdr); 2064 cm->cmsg_len = CMSG_LEN(sizeof(int)); 2065 cm->cmsg_level = IPPROTO_IPV6; 2066 cm->cmsg_type = IPV6_USE_MTU; 2067 2068 cm = (struct cmsghdr *)CMSG_NXTHDR(&smsghdr, cm); 2069 if (oldlen) 2070 memcpy((void *)cm, (void *)oldbuf, oldlen); 2071 2072 free(oldbuf); 2073 } 2074 2075 /* 2076 * look for a cmsgptr that points MTU structure. 2077 * XXX: this procedure seems redundant at this moment, but we'd better 2078 * keep the code generic enough for future extensions. 2079 */ 2080 for (cm = CMSG_FIRSTHDR(&smsghdr); cm; 2081 cm = (struct cmsghdr *)CMSG_NXTHDR(&smsghdr, cm)) { 2082 if (cm->cmsg_len == 0) /* XXX: paranoid check */ 2083 errx(1, "set_pathmtu: internal error"); 2084 2085 if (cm->cmsg_level == IPPROTO_IPV6 && 2086 cm->cmsg_type == IPV6_USE_MTU && 2087 cm->cmsg_len == CMSG_LEN(sizeof(int))) 2088 break; 2089 } 2090 2091 if (cm == NULL) 2092 errx(1, "set_pathmtu: internal error: no space for path MTU"); 2093 2094 *(int *)CMSG_DATA(cm) = mtu; 2095 #endif 2096 } 2097 2098 /* 2099 * tvsub -- 2100 * Subtract 2 timeval structs: out = out - in. Out is assumed to 2101 * be >= in. 2102 */ 2103 void 2104 tvsub(register struct timeval *out, register struct timeval *in) 2105 { 2106 if ((out->tv_usec -= in->tv_usec) < 0) { 2107 --out->tv_sec; 2108 out->tv_usec += 1000000; 2109 } 2110 out->tv_sec -= in->tv_sec; 2111 } 2112 2113 /* 2114 * onint -- 2115 * SIGINT handler. 2116 */ 2117 /* ARGSUSED */ 2118 void 2119 onint(int notused) 2120 { 2121 (void)signal(SIGINT, SIG_IGN); 2122 (void)signal(SIGALRM, SIG_IGN); 2123 2124 summary(); 2125 2126 exit(nreceived == 0); 2127 } 2128 2129 /* 2130 * summary -- 2131 * Print out statistics. 2132 */ 2133 void 2134 summary(void) 2135 { 2136 2137 (void)printf("\n--- %s ping6 statistics ---\n", hostname); 2138 (void)printf("%ld packets transmitted, ", ntransmitted); 2139 (void)printf("%ld packets received, ", nreceived); 2140 if (nrepeats) 2141 (void)printf("+%ld duplicates, ", nrepeats); 2142 if (ntransmitted) { 2143 if (nreceived > ntransmitted) 2144 (void)printf("-- somebody's printing up packets!"); 2145 else 2146 (void)printf("%d%% packet loss", 2147 (int) (((ntransmitted - nreceived) * 100) / 2148 ntransmitted)); 2149 } 2150 (void)putchar('\n'); 2151 if (nreceived && timing) { 2152 /* Only display average to microseconds */ 2153 double num = nreceived + nrepeats; 2154 double avg = tsum / num; 2155 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) 2156 double dev = sqrt(tsumsq / num - avg * avg); 2157 (void)printf( 2158 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2159 tmin, avg, tmax, dev); 2160 #else 2161 (void)printf( 2162 "round-trip min/avg/max = %.3f/%.3f/%.3f ms\n", 2163 tmin, avg, tmax); 2164 #endif 2165 (void)fflush(stdout); 2166 } 2167 (void)fflush(stdout); 2168 } 2169 2170 /*subject type*/ 2171 static char *niqcode[] = { 2172 "IPv6 address", 2173 "DNS label", /*or empty*/ 2174 "IPv4 address", 2175 }; 2176 2177 /*result code*/ 2178 static char *nircode[] = { 2179 "Success", "Refused", "Unknown", 2180 }; 2181 2182 2183 /* 2184 * pr_icmph -- 2185 * Print a descriptive string about an ICMP header. 2186 */ 2187 void 2188 pr_icmph(struct icmp6_hdr *icp, u_char *end) 2189 { 2190 char ntop_buf[INET6_ADDRSTRLEN]; 2191 struct nd_redirect *red; 2192 struct icmp6_nodeinfo *ni; 2193 char dnsname[MAXDNAME + 1]; 2194 const u_char *cp; 2195 size_t l; 2196 2197 switch (icp->icmp6_type) { 2198 case ICMP6_DST_UNREACH: 2199 switch (icp->icmp6_code) { 2200 case ICMP6_DST_UNREACH_NOROUTE: 2201 (void)printf("No Route to Destination\n"); 2202 break; 2203 case ICMP6_DST_UNREACH_ADMIN: 2204 (void)printf("Destination Administratively " 2205 "Unreachable\n"); 2206 break; 2207 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2208 (void)printf("Destination Unreachable Beyond Scope\n"); 2209 break; 2210 case ICMP6_DST_UNREACH_ADDR: 2211 (void)printf("Destination Host Unreachable\n"); 2212 break; 2213 case ICMP6_DST_UNREACH_NOPORT: 2214 (void)printf("Destination Port Unreachable\n"); 2215 break; 2216 default: 2217 (void)printf("Destination Unreachable, Bad Code: %d\n", 2218 icp->icmp6_code); 2219 break; 2220 } 2221 /* Print returned IP header information */ 2222 pr_retip((struct ip6_hdr *)(icp + 1), end); 2223 break; 2224 case ICMP6_PACKET_TOO_BIG: 2225 (void)printf("Packet too big mtu = %d\n", 2226 (int)ntohl(icp->icmp6_mtu)); 2227 pr_retip((struct ip6_hdr *)(icp + 1), end); 2228 break; 2229 case ICMP6_TIME_EXCEEDED: 2230 switch (icp->icmp6_code) { 2231 case ICMP6_TIME_EXCEED_TRANSIT: 2232 (void)printf("Time to live exceeded\n"); 2233 break; 2234 case ICMP6_TIME_EXCEED_REASSEMBLY: 2235 (void)printf("Frag reassembly time exceeded\n"); 2236 break; 2237 default: 2238 (void)printf("Time exceeded, Bad Code: %d\n", 2239 icp->icmp6_code); 2240 break; 2241 } 2242 pr_retip((struct ip6_hdr *)(icp + 1), end); 2243 break; 2244 case ICMP6_PARAM_PROB: 2245 (void)printf("Parameter problem: "); 2246 switch (icp->icmp6_code) { 2247 case ICMP6_PARAMPROB_HEADER: 2248 (void)printf("Erroneous Header "); 2249 break; 2250 case ICMP6_PARAMPROB_NEXTHEADER: 2251 (void)printf("Unknown Nextheader "); 2252 break; 2253 case ICMP6_PARAMPROB_OPTION: 2254 (void)printf("Unrecognized Option "); 2255 break; 2256 default: 2257 (void)printf("Bad code(%d) ", icp->icmp6_code); 2258 break; 2259 } 2260 (void)printf("pointer = 0x%02x\n", 2261 (u_int32_t)ntohl(icp->icmp6_pptr)); 2262 pr_retip((struct ip6_hdr *)(icp + 1), end); 2263 break; 2264 case ICMP6_ECHO_REQUEST: 2265 (void)printf("Echo Request"); 2266 /* XXX ID + Seq + Data */ 2267 break; 2268 case ICMP6_ECHO_REPLY: 2269 (void)printf("Echo Reply"); 2270 /* XXX ID + Seq + Data */ 2271 break; 2272 case ICMP6_MEMBERSHIP_QUERY: 2273 (void)printf("Listener Query"); 2274 break; 2275 case ICMP6_MEMBERSHIP_REPORT: 2276 (void)printf("Listener Report"); 2277 break; 2278 case ICMP6_MEMBERSHIP_REDUCTION: 2279 (void)printf("Listener Done"); 2280 break; 2281 case ND_ROUTER_SOLICIT: 2282 (void)printf("Router Solicitation"); 2283 break; 2284 case ND_ROUTER_ADVERT: 2285 (void)printf("Router Advertisement"); 2286 break; 2287 case ND_NEIGHBOR_SOLICIT: 2288 (void)printf("Neighbor Solicitation"); 2289 break; 2290 case ND_NEIGHBOR_ADVERT: 2291 (void)printf("Neighbor Advertisement"); 2292 break; 2293 case ND_REDIRECT: 2294 red = (struct nd_redirect *)icp; 2295 (void)printf("Redirect\n"); 2296 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2297 sizeof(ntop_buf))) 2298 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2299 (void)printf("Destination: %s", ntop_buf); 2300 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2301 sizeof(ntop_buf))) 2302 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2303 (void)printf(" New Target: %s", ntop_buf); 2304 break; 2305 case ICMP6_NI_QUERY: 2306 (void)printf("Node Information Query"); 2307 /* XXX ID + Seq + Data */ 2308 ni = (struct icmp6_nodeinfo *)icp; 2309 l = end - (u_char *)(ni + 1); 2310 printf(", "); 2311 switch (ntohs(ni->ni_qtype)) { 2312 case NI_QTYPE_NOOP: 2313 (void)printf("NOOP"); 2314 break; 2315 case NI_QTYPE_SUPTYPES: 2316 (void)printf("Supported qtypes"); 2317 break; 2318 case NI_QTYPE_FQDN: 2319 (void)printf("DNS name"); 2320 break; 2321 case NI_QTYPE_NODEADDR: 2322 (void)printf("nodeaddr"); 2323 break; 2324 case NI_QTYPE_IPV4ADDR: 2325 (void)printf("IPv4 nodeaddr"); 2326 break; 2327 default: 2328 (void)printf("unknown qtype"); 2329 break; 2330 } 2331 if (options & F_VERBOSE) { 2332 switch (ni->ni_code) { 2333 case ICMP6_NI_SUBJ_IPV6: 2334 if (l == sizeof(struct in6_addr) && 2335 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2336 sizeof(ntop_buf)) != NULL) { 2337 (void)printf(", subject=%s(%s)", 2338 niqcode[ni->ni_code], ntop_buf); 2339 } else { 2340 #if 1 2341 /* backward compat to -W */ 2342 (void)printf(", oldfqdn"); 2343 #else 2344 (void)printf(", invalid"); 2345 #endif 2346 } 2347 break; 2348 case ICMP6_NI_SUBJ_FQDN: 2349 if (end == (u_char *)(ni + 1)) { 2350 (void)printf(", no subject"); 2351 break; 2352 } 2353 printf(", subject=%s", niqcode[ni->ni_code]); 2354 cp = (const u_char *)(ni + 1); 2355 if (dnsdecode(&cp, end, NULL, dnsname, 2356 sizeof(dnsname)) != NULL) 2357 printf("(%s)", dnsname); 2358 else 2359 printf("(invalid)"); 2360 break; 2361 case ICMP6_NI_SUBJ_IPV4: 2362 if (l == sizeof(struct in_addr) && 2363 inet_ntop(AF_INET, ni + 1, ntop_buf, 2364 sizeof(ntop_buf)) != NULL) { 2365 (void)printf(", subject=%s(%s)", 2366 niqcode[ni->ni_code], ntop_buf); 2367 } else 2368 (void)printf(", invalid"); 2369 break; 2370 default: 2371 (void)printf(", invalid"); 2372 break; 2373 } 2374 } 2375 break; 2376 case ICMP6_NI_REPLY: 2377 (void)printf("Node Information Reply"); 2378 /* XXX ID + Seq + Data */ 2379 ni = (struct icmp6_nodeinfo *)icp; 2380 printf(", "); 2381 switch (ntohs(ni->ni_qtype)) { 2382 case NI_QTYPE_NOOP: 2383 (void)printf("NOOP"); 2384 break; 2385 case NI_QTYPE_SUPTYPES: 2386 (void)printf("Supported qtypes"); 2387 break; 2388 case NI_QTYPE_FQDN: 2389 (void)printf("DNS name"); 2390 break; 2391 case NI_QTYPE_NODEADDR: 2392 (void)printf("nodeaddr"); 2393 break; 2394 case NI_QTYPE_IPV4ADDR: 2395 (void)printf("IPv4 nodeaddr"); 2396 break; 2397 default: 2398 (void)printf("unknown qtype"); 2399 break; 2400 } 2401 if (options & F_VERBOSE) { 2402 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0])) 2403 printf(", invalid"); 2404 else 2405 printf(", %s", nircode[ni->ni_code]); 2406 } 2407 break; 2408 default: 2409 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2410 } 2411 } 2412 2413 /* 2414 * pr_iph -- 2415 * Print an IP6 header. 2416 */ 2417 void 2418 pr_iph(struct ip6_hdr *ip6) 2419 { 2420 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2421 u_int8_t tc; 2422 char ntop_buf[INET6_ADDRSTRLEN]; 2423 2424 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2425 tc = (tc >> 4) & 0x0f; 2426 tc |= (ip6->ip6_vfc << 4); 2427 2428 printf("Vr TC Flow Plen Nxt Hlim\n"); 2429 printf(" %1x %02x %05x %04x %02x %02x\n", 2430 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2431 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2432 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2433 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2434 printf("%s->", ntop_buf); 2435 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2436 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2437 printf("%s\n", ntop_buf); 2438 } 2439 2440 /* 2441 * pr_addr -- 2442 * Return an ascii host address as a dotted quad and optionally with 2443 * a hostname. 2444 */ 2445 const char * 2446 pr_addr(struct sockaddr *addr, int addrlen) 2447 { 2448 static char buf[NI_MAXHOST]; 2449 int flag; 2450 2451 #ifdef NI_WITHSCOPEID 2452 flag = NI_WITHSCOPEID; 2453 #else 2454 flag = 0; 2455 #endif 2456 if ((options & F_HOSTNAME) == 0) 2457 flag |= NI_NUMERICHOST; 2458 2459 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) 2460 return (buf); 2461 else 2462 return "?"; 2463 } 2464 2465 /* 2466 * pr_retip -- 2467 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2468 */ 2469 void 2470 pr_retip(struct ip6_hdr *ip6, u_char *end) 2471 { 2472 u_char *cp = (u_char *)ip6, nh; 2473 int hlen; 2474 2475 if (end - (u_char *)ip6 < sizeof(*ip6)) { 2476 printf("IP6"); 2477 goto trunc; 2478 } 2479 pr_iph(ip6); 2480 hlen = sizeof(*ip6); 2481 2482 nh = ip6->ip6_nxt; 2483 cp += hlen; 2484 while (end - cp >= 8) { 2485 switch (nh) { 2486 case IPPROTO_HOPOPTS: 2487 printf("HBH "); 2488 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2489 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2490 break; 2491 case IPPROTO_DSTOPTS: 2492 printf("DSTOPT "); 2493 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2494 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2495 break; 2496 case IPPROTO_FRAGMENT: 2497 printf("FRAG "); 2498 hlen = sizeof(struct ip6_frag); 2499 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2500 break; 2501 case IPPROTO_ROUTING: 2502 printf("RTHDR "); 2503 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2504 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2505 break; 2506 #ifdef IPSEC 2507 case IPPROTO_AH: 2508 printf("AH "); 2509 hlen = (((struct ah *)cp)->ah_len+2) << 2; 2510 nh = ((struct ah *)cp)->ah_nxt; 2511 break; 2512 #endif 2513 case IPPROTO_ICMPV6: 2514 printf("ICMP6: type = %d, code = %d\n", 2515 *cp, *(cp + 1)); 2516 return; 2517 case IPPROTO_ESP: 2518 printf("ESP\n"); 2519 return; 2520 case IPPROTO_TCP: 2521 printf("TCP: from port %u, to port %u (decimal)\n", 2522 (*cp * 256 + *(cp + 1)), 2523 (*(cp + 2) * 256 + *(cp + 3))); 2524 return; 2525 case IPPROTO_UDP: 2526 printf("UDP: from port %u, to port %u (decimal)\n", 2527 (*cp * 256 + *(cp + 1)), 2528 (*(cp + 2) * 256 + *(cp + 3))); 2529 return; 2530 default: 2531 printf("Unknown Header(%d)\n", nh); 2532 return; 2533 } 2534 2535 if ((cp += hlen) >= end) 2536 goto trunc; 2537 } 2538 if (end - cp < 8) 2539 goto trunc; 2540 2541 putchar('\n'); 2542 return; 2543 2544 trunc: 2545 printf("...\n"); 2546 return; 2547 } 2548 2549 void 2550 fill(char *bp, char *patp) 2551 { 2552 register int ii, jj, kk; 2553 int pat[16]; 2554 char *cp; 2555 2556 for (cp = patp; *cp; cp++) 2557 if (!isxdigit(*cp)) 2558 errx(1, "patterns must be specified as hex digits"); 2559 ii = sscanf(patp, 2560 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2561 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2562 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2563 &pat[13], &pat[14], &pat[15]); 2564 2565 /* xxx */ 2566 if (ii > 0) 2567 for (kk = 0; 2568 kk <= MAXDATALEN - (8 + sizeof(struct timeval) + ii); 2569 kk += ii) 2570 for (jj = 0; jj < ii; ++jj) 2571 bp[jj + kk] = pat[jj]; 2572 if (!(options & F_QUIET)) { 2573 (void)printf("PATTERN: 0x"); 2574 for (jj = 0; jj < ii; ++jj) 2575 (void)printf("%02x", bp[jj] & 0xFF); 2576 (void)printf("\n"); 2577 } 2578 } 2579 2580 #ifdef IPSEC 2581 #ifdef IPSEC_POLICY_IPSEC 2582 int 2583 setpolicy(int so, char *policy) 2584 { 2585 char *buf; 2586 2587 if (policy == NULL) 2588 return 0; /* ignore */ 2589 2590 buf = ipsec_set_policy(policy, strlen(policy)); 2591 if (buf == NULL) 2592 errx(1, "%s", ipsec_strerror()); 2593 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2594 ipsec_get_policylen(buf)) < 0) 2595 warnx("Unable to set IPSec policy"); 2596 free(buf); 2597 2598 return 0; 2599 } 2600 #endif 2601 #endif 2602 2603 char * 2604 nigroup(char *name) 2605 { 2606 char *p; 2607 unsigned char *q; 2608 MD5_CTX ctxt; 2609 u_int8_t digest[16]; 2610 u_int8_t c; 2611 size_t l; 2612 char hbuf[NI_MAXHOST]; 2613 struct in6_addr in6; 2614 2615 p = strchr(name, '.'); 2616 if (!p) 2617 p = name + strlen(name); 2618 l = p - name; 2619 if (l > 63 || l > sizeof(hbuf) - 1) 2620 return NULL; /*label too long*/ 2621 strncpy(hbuf, name, l); 2622 hbuf[(int)l] = '\0'; 2623 2624 for (q = name; *q; q++) { 2625 if (isupper(*q)) 2626 *q = tolower(*q); 2627 } 2628 2629 /* generate 8 bytes of pseudo-random value. */ 2630 bzero(&ctxt, sizeof(ctxt)); 2631 MD5Init(&ctxt); 2632 c = l & 0xff; 2633 MD5Update(&ctxt, &c, sizeof(c)); 2634 MD5Update(&ctxt, name, l); 2635 MD5Final(digest, &ctxt); 2636 2637 if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1) 2638 return NULL; /*XXX*/ 2639 bcopy(digest, &in6.s6_addr[12], 4); 2640 2641 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2642 return NULL; 2643 2644 return strdup(hbuf); 2645 } 2646 2647 void 2648 usage(void) 2649 { 2650 (void)fprintf(stderr, 2651 "usage: ping6 [-dfH" 2652 #ifdef IPV6_USE_MIN_MTU 2653 "m" 2654 #endif 2655 "nNqtvwW" 2656 #ifdef IPV6_REACHCONF 2657 "R" 2658 #endif 2659 #ifdef IPSEC 2660 #ifdef IPSEC_POLICY_IPSEC 2661 "] [-P policy" 2662 #else 2663 "AE" 2664 #endif 2665 #endif 2666 "] [-a [aAclsg]] [-b sockbufsiz] [-c count] \n" 2667 "\t[-I interface] [-i wait] [-l preload] [-p pattern] " 2668 "[-S sourceaddr]\n" 2669 "\t[-s packetsize] [-h hoplimit] [hops...] host\n"); 2670 exit(1); 2671 } 2672