1 /* $NetBSD: ping6.c,v 1.82 2013/10/19 01:09:16 christos Exp $ */ 2 /* $KAME: ping6.c,v 1.164 2002/11/16 14:05:37 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. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 */ 66 67 #if 0 68 #ifndef lint 69 static char copyright[] = 70 "@(#) Copyright (c) 1989, 1993\n\ 71 The Regents of the University of California. All rights reserved.\n"; 72 #endif /* not lint */ 73 74 #ifndef lint 75 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 76 #endif /* not lint */ 77 #else 78 #include <sys/cdefs.h> 79 #ifndef lint 80 __RCSID("$NetBSD: ping6.c,v 1.82 2013/10/19 01:09:16 christos Exp $"); 81 #endif 82 #endif 83 84 /* 85 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 86 * measure round-trip-delays and packet loss across network paths. 87 * 88 * Author - 89 * Mike Muuss 90 * U. S. Army Ballistic Research Laboratory 91 * December, 1983 92 * 93 * Status - 94 * Public Domain. Distribution Unlimited. 95 * Bugs - 96 * More statistics could always be gathered. 97 * This program has to run SUID to ROOT to access the ICMP socket. 98 */ 99 /* 100 * NOTE: 101 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics 102 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link* 103 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of 104 * network attached to 1 or more interfaces) 105 */ 106 107 #include <sys/param.h> 108 #include <sys/uio.h> 109 #include <sys/socket.h> 110 #include <sys/time.h> 111 112 #include <net/if.h> 113 #include <net/route.h> 114 115 #include <netinet/in.h> 116 #include <netinet/ip6.h> 117 #include <netinet/icmp6.h> 118 #include <arpa/inet.h> 119 #include <arpa/nameser.h> 120 #include <netdb.h> 121 122 #include <ctype.h> 123 #include <err.h> 124 #include <errno.h> 125 #include <fcntl.h> 126 #include <math.h> 127 #include <signal.h> 128 #include <stdio.h> 129 #include <stdlib.h> 130 #include <string.h> 131 #include <unistd.h> 132 #include <poll.h> 133 134 #ifdef IPSEC 135 #include <netinet/ip6.h> 136 #include <netipsec/ipsec.h> 137 #endif 138 139 #include <md5.h> 140 141 struct tv32 { 142 u_int32_t tv32_sec; 143 u_int32_t tv32_usec; 144 }; 145 146 #define MAXPACKETLEN 131072 147 #define IP6LEN 40 148 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 149 #define ICMP6ECHOTMLEN sizeof(struct tv32) 150 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 151 /* FQDN case, 64 bits of nonce + 32 bits ttl */ 152 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 153 #define EXTRA 256 /* for AH and various other headers. weird. */ 154 #define DEFDATALEN ICMP6ECHOTMLEN 155 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 156 #define NROUTES 9 /* number of record route slots */ 157 158 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 159 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 160 #define SET(bit) (A(bit) |= B(bit)) 161 #define CLR(bit) (A(bit) &= (~B(bit))) 162 #define TST(bit) (A(bit) & B(bit)) 163 164 #define F_FLOOD 0x0001 165 #define F_INTERVAL 0x0002 166 #define F_PINGFILLED 0x0008 167 #define F_QUIET 0x0010 168 #define F_RROUTE 0x0020 169 #define F_SO_DEBUG 0x0040 170 #define F_VERBOSE 0x0100 171 #ifdef IPSEC 172 #ifdef IPSEC_POLICY_IPSEC 173 #define F_POLICY 0x0400 174 #else 175 #define F_AUTHHDR 0x0200 176 #define F_ENCRYPT 0x0400 177 #endif /*IPSEC_POLICY_IPSEC*/ 178 #endif /*IPSEC*/ 179 #define F_NODEADDR 0x0800 180 #define F_FQDN 0x1000 181 #define F_INTERFACE 0x2000 182 #define F_SRCADDR 0x4000 183 #ifdef IPV6_REACHCONF 184 #define F_REACHCONF 0x8000 185 #endif 186 #define F_HOSTNAME 0x10000 187 #define F_FQDNOLD 0x20000 188 #define F_NIGROUP 0x40000 189 #define F_SUPTYPES 0x80000 190 #define F_NOMINMTU 0x100000 191 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 192 static u_int options; 193 194 #define IN6LEN sizeof(struct in6_addr) 195 #define SA6LEN sizeof(struct sockaddr_in6) 196 #define DUMMY_PORT 10101 197 198 #define SIN6(s) ((struct sockaddr_in6 *)(s)) 199 200 /* 201 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 202 * number of received sequence numbers we can keep track of. Change 128 203 * to 8192 for complete accuracy... 204 */ 205 #define MAX_DUP_CHK (8 * 8192) 206 static int mx_dup_ck = MAX_DUP_CHK; 207 static char rcvd_tbl[MAX_DUP_CHK / 8]; 208 209 static struct addrinfo *res; 210 static struct sockaddr_in6 dst; /* who to ping6 */ 211 static struct sockaddr_in6 src; /* src addr of this packet */ 212 static socklen_t srclen; 213 static int datalen = DEFDATALEN; 214 static int s; /* socket file descriptor */ 215 static u_char outpack[MAXPACKETLEN]; 216 static char BSPACE = '\b'; /* characters written for flood */ 217 static char DOT = '.'; 218 static char *hostname; 219 static int ident; /* process id to identify our packets */ 220 static u_int8_t nonce[8]; /* nonce field for node information */ 221 static int hoplimit = -1; /* hoplimit */ 222 223 /* counters */ 224 static long npackets; /* max packets to transmit */ 225 static long nreceived; /* # of packets we got back */ 226 static long nrepeats; /* number of duplicates */ 227 static long ntransmitted; /* sequence # for outbound packets = #sent */ 228 static struct timeval interval = {1, 0}; /* interval between packets */ 229 230 /* timing */ 231 static int timing; /* flag to do timing */ 232 static double tmin = 999999999.0; /* minimum round trip time */ 233 static double tmax = 0.0; /* maximum round trip time */ 234 static double tsum = 0.0; /* sum of all times, for doing average */ 235 static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 236 237 /* for node addresses */ 238 static u_short naflags; 239 240 /* for ancillary data(advanced API) */ 241 static struct msghdr smsghdr; 242 static struct iovec smsgiov; 243 static char *scmsg = 0; 244 245 static volatile sig_atomic_t seenalrm; 246 static volatile sig_atomic_t seenint; 247 #ifdef SIGINFO 248 static volatile sig_atomic_t seeninfo; 249 #endif 250 251 static void fill(char *, char *); 252 static int get_hoplim(struct msghdr *); 253 static int get_pathmtu(struct msghdr *); 254 static struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); 255 static void onsignal(int); 256 static void retransmit(void); 257 __dead static void onint(int); 258 static size_t pingerlen(void); 259 static int pinger(void); 260 static const char *pr_addr(struct sockaddr *, int); 261 static void pr_icmph(struct icmp6_hdr *, u_char *); 262 static void pr_iph(struct ip6_hdr *); 263 static void pr_suptypes(struct icmp6_nodeinfo *, size_t); 264 static void pr_nodeaddr(struct icmp6_nodeinfo *, int); 265 static int myechoreply(const struct icmp6_hdr *); 266 static int mynireply(const struct icmp6_nodeinfo *); 267 static char *dnsdecode(const u_char **, const u_char *, const u_char *, 268 char *, size_t); 269 static void pr_pack(u_char *, int, struct msghdr *); 270 static void pr_exthdrs(struct msghdr *); 271 static void pr_ip6opt(void *); 272 static void pr_rthdr(void *); 273 static int pr_bitrange(u_int32_t, int, int); 274 static void pr_retip(struct ip6_hdr *, u_char *); 275 static void summary(void); 276 static void tvsub(struct timeval *, struct timeval *); 277 static int setpolicy(int, char *); 278 static char *nigroup(char *); 279 __dead static void usage(void); 280 281 int 282 main(int argc, char *argv[]) 283 { 284 struct itimerval itimer; 285 struct sockaddr_in6 from; 286 int timeout; 287 struct addrinfo hints; 288 struct pollfd fdmaskp[1]; 289 int cc; 290 u_int i, packlen; 291 int ch, hold, preload, optval, ret_ga; 292 u_char *datap, *packet; 293 char *e, *target, *ifname = NULL, *gateway = NULL; 294 int ip6optlen = 0; 295 struct cmsghdr *scmsgp = NULL; 296 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 297 u_long lsockbufsize; 298 int sockbufsize = 0; 299 #endif 300 int usepktinfo = 0; 301 struct in6_pktinfo *pktinfo = NULL; 302 struct ip6_rthdr *rthdr = NULL; 303 #ifdef IPSEC_POLICY_IPSEC 304 char *policy_in = NULL; 305 char *policy_out = NULL; 306 #endif 307 double intval; 308 size_t rthlen; 309 #ifdef IPV6_USE_MIN_MTU 310 int mflag = 0; 311 #endif 312 313 /* just to be sure */ 314 memset(&smsghdr, 0, sizeof(smsghdr)); 315 memset(&smsgiov, 0, sizeof(smsgiov)); 316 317 preload = 0; 318 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 319 #ifndef IPSEC 320 #define ADDOPTS 321 #else 322 #ifdef IPSEC_POLICY_IPSEC 323 #define ADDOPTS "P:" 324 #else 325 #define ADDOPTS "AE" 326 #endif /*IPSEC_POLICY_IPSEC*/ 327 #endif 328 while ((ch = getopt(argc, argv, 329 "a:b:c:dfHg:h:I:i:l:mnNp:qRS:s:tvwW" ADDOPTS)) != -1) { 330 #undef ADDOPTS 331 switch (ch) { 332 case 'a': 333 { 334 char *cp; 335 336 options &= ~F_NOUSERDATA; 337 options |= F_NODEADDR; 338 for (cp = optarg; *cp != '\0'; cp++) { 339 switch (*cp) { 340 case 'a': 341 naflags |= NI_NODEADDR_FLAG_ALL; 342 break; 343 case 'c': 344 case 'C': 345 naflags |= NI_NODEADDR_FLAG_COMPAT; 346 break; 347 case 'l': 348 case 'L': 349 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 350 break; 351 case 's': 352 case 'S': 353 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 354 break; 355 case 'g': 356 case 'G': 357 naflags |= NI_NODEADDR_FLAG_GLOBAL; 358 break; 359 case 'A': /* experimental. not in the spec */ 360 #ifdef NI_NODEADDR_FLAG_ANYCAST 361 naflags |= NI_NODEADDR_FLAG_ANYCAST; 362 break; 363 #else 364 errx(1, 365 "-a A is not supported on the platform"); 366 /*NOTREACHED*/ 367 #endif 368 default: 369 usage(); 370 /*NOTREACHED*/ 371 } 372 } 373 break; 374 } 375 case 'b': 376 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 377 errno = 0; 378 e = NULL; 379 lsockbufsize = strtoul(optarg, &e, 10); 380 sockbufsize = lsockbufsize; 381 if (errno || !*optarg || *e || 382 (u_long)sockbufsize != lsockbufsize) 383 errx(1, "invalid socket buffer size"); 384 #else 385 errx(1, 386 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 387 #endif 388 break; 389 case 'c': 390 npackets = strtol(optarg, &e, 10); 391 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 392 errx(1, 393 "illegal number of packets -- %s", optarg); 394 break; 395 case 'd': 396 options |= F_SO_DEBUG; 397 break; 398 case 'f': 399 if (getuid()) { 400 errno = EPERM; 401 errx(1, "Must be superuser to flood ping"); 402 } 403 options |= F_FLOOD; 404 setbuf(stdout, NULL); 405 break; 406 case 'g': 407 gateway = optarg; 408 break; 409 case 'H': 410 options |= F_HOSTNAME; 411 break; 412 case 'h': /* hoplimit */ 413 hoplimit = strtol(optarg, &e, 10); 414 if (*optarg == '\0' || *e != '\0') 415 errx(1, "illegal hoplimit %s", optarg); 416 if (255 < hoplimit || hoplimit < -1) 417 errx(1, 418 "illegal hoplimit -- %s", optarg); 419 break; 420 case 'I': 421 ifname = optarg; 422 options |= F_INTERFACE; 423 #ifndef USE_SIN6_SCOPE_ID 424 usepktinfo++; 425 #endif 426 break; 427 case 'i': /* wait between sending packets */ 428 intval = strtod(optarg, &e); 429 if (*optarg == '\0' || *e != '\0') 430 errx(1, "illegal timing interval %s", optarg); 431 if (intval < 1 && getuid()) { 432 errx(1, "%s: only root may use interval < 1s", 433 strerror(EPERM)); 434 } 435 interval.tv_sec = (long)intval; 436 interval.tv_usec = 437 (long)((intval - interval.tv_sec) * 1000000); 438 if (interval.tv_sec < 0) 439 errx(1, "illegal timing interval %s", optarg); 440 /* less than 1/hz does not make sense */ 441 if (interval.tv_sec == 0 && interval.tv_usec < 10000) { 442 warnx("too small interval, raised to 0.01"); 443 interval.tv_usec = 10000; 444 } 445 options |= F_INTERVAL; 446 break; 447 case 'l': 448 if (getuid()) { 449 errno = EPERM; 450 errx(1, "Must be superuser to preload"); 451 } 452 preload = strtol(optarg, &e, 10); 453 if (preload < 0 || *optarg == '\0' || *e != '\0') 454 errx(1, "illegal preload value -- %s", optarg); 455 break; 456 case 'm': 457 #ifdef IPV6_USE_MIN_MTU 458 mflag++; 459 break; 460 #else 461 errx(1, "-%c is not supported on this platform", ch); 462 /*NOTREACHED*/ 463 #endif 464 case 'n': 465 options &= ~F_HOSTNAME; 466 break; 467 case 'N': 468 options |= F_NIGROUP; 469 break; 470 case 'p': /* fill buffer with user pattern */ 471 options |= F_PINGFILLED; 472 fill((char *)datap, optarg); 473 break; 474 case 'q': 475 options |= F_QUIET; 476 break; 477 case 'R': 478 #ifdef IPV6_REACHCONF 479 options |= F_REACHCONF; 480 break; 481 #else 482 errx(1, "-R is not supported in this configuration"); 483 #endif 484 case 'S': 485 memset(&hints, 0, sizeof(struct addrinfo)); 486 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ 487 hints.ai_family = AF_INET6; 488 hints.ai_socktype = SOCK_RAW; 489 hints.ai_protocol = IPPROTO_ICMPV6; 490 491 ret_ga = getaddrinfo(optarg, NULL, &hints, &res); 492 if (ret_ga) { 493 errx(1, "invalid source address: %s", 494 gai_strerror(ret_ga)); 495 } 496 /* 497 * res->ai_family must be AF_INET6 and res->ai_addrlen 498 * must be sizeof(src). 499 */ 500 memcpy(&src, res->ai_addr, res->ai_addrlen); 501 srclen = res->ai_addrlen; 502 freeaddrinfo(res); 503 options |= F_SRCADDR; 504 break; 505 case 's': /* size of packet to send */ 506 datalen = strtol(optarg, &e, 10); 507 if (datalen < 0 || *optarg == '\0' || *e != '\0') 508 errx(1, "illegal datalen value -- %s", optarg); 509 if (datalen > MAXDATALEN) { 510 errx(1, 511 "datalen value too large, maximum is %d", 512 MAXDATALEN); 513 } 514 break; 515 case 't': 516 options &= ~F_NOUSERDATA; 517 options |= F_SUPTYPES; 518 break; 519 case 'v': 520 options |= F_VERBOSE; 521 break; 522 case 'w': 523 options &= ~F_NOUSERDATA; 524 options |= F_FQDN; 525 break; 526 case 'W': 527 options &= ~F_NOUSERDATA; 528 options |= F_FQDNOLD; 529 break; 530 #ifdef IPSEC 531 #ifdef IPSEC_POLICY_IPSEC 532 case 'P': 533 options |= F_POLICY; 534 if (!strncmp("in", optarg, 2)) { 535 if ((policy_in = strdup(optarg)) == NULL) 536 errx(1, "strdup"); 537 } else if (!strncmp("out", optarg, 3)) { 538 if ((policy_out = strdup(optarg)) == NULL) 539 errx(1, "strdup"); 540 } else 541 errx(1, "invalid security policy"); 542 break; 543 #else 544 case 'A': 545 options |= F_AUTHHDR; 546 break; 547 case 'E': 548 options |= F_ENCRYPT; 549 break; 550 #endif /*IPSEC_POLICY_IPSEC*/ 551 #endif /*IPSEC*/ 552 default: 553 usage(); 554 /*NOTREACHED*/ 555 } 556 } 557 558 argc -= optind; 559 argv += optind; 560 561 if (argc < 1) { 562 usage(); 563 /*NOTREACHED*/ 564 } 565 566 if (argc > 1) { 567 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 568 argc - 1)); 569 if (rthlen == 0) { 570 errx(1, "too many intermediate hops"); 571 /*NOTREACHED*/ 572 } 573 ip6optlen += rthlen; 574 } 575 576 if (options & F_NIGROUP) { 577 target = nigroup(argv[argc - 1]); 578 if (target == NULL) { 579 usage(); 580 /*NOTREACHED*/ 581 } 582 } else 583 target = argv[argc - 1]; 584 585 /* getaddrinfo */ 586 memset(&hints, 0, sizeof(struct addrinfo)); 587 hints.ai_flags = AI_CANONNAME; 588 hints.ai_family = AF_INET6; 589 hints.ai_socktype = SOCK_RAW; 590 hints.ai_protocol = IPPROTO_ICMPV6; 591 592 ret_ga = getaddrinfo(target, NULL, &hints, &res); 593 if (ret_ga) 594 errx(1, "%s", gai_strerror(ret_ga)); 595 if (res->ai_canonname) 596 hostname = res->ai_canonname; 597 else 598 hostname = target; 599 600 if (!res->ai_addr) 601 errx(1, "getaddrinfo failed"); 602 603 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 604 605 if ((s = socket(res->ai_family, res->ai_socktype, 606 res->ai_protocol)) < 0) 607 err(1, "socket"); 608 609 /* set the source address if specified. */ 610 if ((options & F_SRCADDR) && 611 bind(s, (struct sockaddr *)&src, srclen) != 0) { 612 err(1, "bind"); 613 } 614 615 /* set the gateway (next hop) if specified */ 616 if (gateway) { 617 struct addrinfo ghints, *gres; 618 int error; 619 620 memset(&ghints, 0, sizeof(ghints)); 621 ghints.ai_family = AF_INET6; 622 ghints.ai_socktype = SOCK_RAW; 623 ghints.ai_protocol = IPPROTO_ICMPV6; 624 625 error = getaddrinfo(gateway, NULL, &hints, &gres); 626 if (error) { 627 errx(1, "getaddrinfo for the gateway %s: %s", 628 gateway, gai_strerror(error)); 629 } 630 if (gres->ai_next && (options & F_VERBOSE)) 631 warnx("gateway resolves to multiple addresses"); 632 633 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP, 634 gres->ai_addr, gres->ai_addrlen)) { 635 err(1, "setsockopt(IPV6_NEXTHOP)"); 636 } 637 638 freeaddrinfo(gres); 639 } 640 641 /* 642 * let the kerel pass extension headers of incoming packets, 643 * for privileged socket options 644 */ 645 if ((options & F_VERBOSE) != 0) { 646 int opton = 1; 647 648 #ifdef IPV6_RECVHOPOPTS 649 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 650 sizeof(opton))) 651 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 652 #else /* old adv. API */ 653 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 654 sizeof(opton))) 655 err(1, "setsockopt(IPV6_HOPOPTS)"); 656 #endif 657 #ifdef IPV6_RECVDSTOPTS 658 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 659 sizeof(opton))) 660 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 661 #else /* old adv. API */ 662 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 663 sizeof(opton))) 664 err(1, "setsockopt(IPV6_DSTOPTS)"); 665 #endif 666 #ifdef IPV6_RECVRTHDRDSTOPTS 667 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 668 sizeof(opton))) 669 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 670 #endif 671 } 672 673 /* revoke root privilege */ 674 seteuid(getuid()); 675 setuid(getuid()); 676 677 if ((options & F_FLOOD) && (options & F_INTERVAL)) 678 errx(1, "-f and -i incompatible options"); 679 680 if ((options & F_NOUSERDATA) == 0) { 681 if (datalen >= (int)sizeof(struct tv32)) { 682 /* we can time transfer */ 683 timing = 1; 684 } else 685 timing = 0; 686 /* in F_VERBOSE case, we may get non-echoreply packets*/ 687 if (options & F_VERBOSE) 688 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 689 else 690 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 691 } else { 692 /* suppress timing for node information query */ 693 timing = 0; 694 datalen = 2048; 695 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 696 } 697 698 if (!(packet = (u_char *)malloc(packlen))) 699 err(1, "Unable to allocate packet"); 700 if (!(options & F_PINGFILLED)) 701 for (i = ICMP6ECHOLEN; i < packlen; ++i) 702 *datap++ = i; 703 704 ident = arc4random() & 0xFFFF; 705 memset(nonce, 0, sizeof(nonce)); 706 for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t)) { 707 uint32_t r = arc4random(); 708 memcpy(&nonce[i], &r, sizeof(r)); 709 } 710 711 hold = 1; 712 713 if (options & F_SO_DEBUG) 714 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 715 sizeof(hold)); 716 optval = IPV6_DEFHLIM; 717 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 718 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 719 &optval, sizeof(optval)) == -1) 720 err(1, "IPV6_MULTICAST_HOPS"); 721 #ifdef IPV6_USE_MIN_MTU 722 if (mflag != 1) { 723 optval = mflag > 1 ? 0 : 1; 724 725 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 726 &optval, sizeof(optval)) == -1) 727 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 728 } 729 #ifdef IPV6_RECVPATHMTU 730 else { 731 optval = 1; 732 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, 733 &optval, sizeof(optval)) == -1) 734 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 735 } 736 #endif /* IPV6_RECVPATHMTU */ 737 #endif /* IPV6_USE_MIN_MTU */ 738 739 #ifdef IPSEC 740 #ifdef IPSEC_POLICY_IPSEC 741 if (options & F_POLICY) { 742 if (setpolicy(s, policy_in) < 0) 743 errx(1, "%s", ipsec_strerror()); 744 if (setpolicy(s, policy_out) < 0) 745 errx(1, "%s", ipsec_strerror()); 746 } 747 #else 748 if (options & F_AUTHHDR) { 749 optval = IPSEC_LEVEL_REQUIRE; 750 #ifdef IPV6_AUTH_TRANS_LEVEL 751 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 752 &optval, sizeof(optval)) == -1) 753 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 754 #else /* old def */ 755 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 756 &optval, sizeof(optval)) == -1) 757 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 758 #endif 759 } 760 if (options & F_ENCRYPT) { 761 optval = IPSEC_LEVEL_REQUIRE; 762 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 763 &optval, sizeof(optval)) == -1) 764 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 765 } 766 #endif /*IPSEC_POLICY_IPSEC*/ 767 #endif 768 769 #ifdef ICMP6_FILTER 770 { 771 struct icmp6_filter filt; 772 if (!(options & F_VERBOSE)) { 773 ICMP6_FILTER_SETBLOCKALL(&filt); 774 if ((options & F_FQDN) || (options & F_FQDNOLD) || 775 (options & F_NODEADDR) || (options & F_SUPTYPES)) 776 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 777 else 778 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 779 } else { 780 ICMP6_FILTER_SETPASSALL(&filt); 781 } 782 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 783 sizeof(filt)) < 0) 784 err(1, "setsockopt(ICMP6_FILTER)"); 785 } 786 #endif /*ICMP6_FILTER*/ 787 788 /* let the kerel pass extension headers of incoming packets */ 789 if ((options & F_VERBOSE) != 0) { 790 int opton = 1; 791 792 #ifdef IPV6_RECVRTHDR 793 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 794 sizeof(opton))) 795 err(1, "setsockopt(IPV6_RECVRTHDR)"); 796 #else /* old adv. API */ 797 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton, 798 sizeof(opton))) 799 err(1, "setsockopt(IPV6_RTHDR)"); 800 #endif 801 } 802 803 /* 804 optval = 1; 805 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 806 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 807 &optval, sizeof(optval)) == -1) 808 err(1, "IPV6_MULTICAST_LOOP"); 809 */ 810 811 /* Specify the outgoing interface and/or the source address */ 812 if (usepktinfo) 813 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 814 815 if (hoplimit != -1) 816 ip6optlen += CMSG_SPACE(sizeof(int)); 817 818 #ifdef IPV6_REACHCONF 819 if (options & F_REACHCONF) 820 ip6optlen += CMSG_SPACE(0); 821 #endif 822 823 /* set IP6 packet options */ 824 if (ip6optlen) { 825 if ((scmsg = (char *)malloc(ip6optlen)) == 0) 826 errx(1, "can't allocate enough memory"); 827 smsghdr.msg_control = (caddr_t)scmsg; 828 smsghdr.msg_controllen = ip6optlen; 829 scmsgp = (struct cmsghdr *)scmsg; 830 } 831 if (usepktinfo) { 832 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); 833 memset(pktinfo, 0, sizeof(*pktinfo)); 834 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 835 scmsgp->cmsg_level = IPPROTO_IPV6; 836 scmsgp->cmsg_type = IPV6_PKTINFO; 837 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 838 } 839 840 /* set the outgoing interface */ 841 if (ifname) { 842 #ifndef USE_SIN6_SCOPE_ID 843 /* pktinfo must have already been allocated */ 844 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0) 845 errx(1, "%s: invalid interface name", ifname); 846 #else 847 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 848 errx(1, "%s: invalid interface name", ifname); 849 #endif 850 } 851 if (hoplimit != -1) { 852 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 853 scmsgp->cmsg_level = IPPROTO_IPV6; 854 scmsgp->cmsg_type = IPV6_HOPLIMIT; 855 *(int *)(CMSG_DATA(scmsgp)) = hoplimit; 856 857 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 858 } 859 #ifdef IPV6_REACHCONF 860 if (options & F_REACHCONF) { 861 scmsgp->cmsg_len = CMSG_LEN(0); 862 scmsgp->cmsg_level = IPPROTO_IPV6; 863 scmsgp->cmsg_type = IPV6_REACHCONF; 864 865 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 866 } 867 #endif 868 869 if (argc > 1) { /* some intermediate addrs are specified */ 870 int hops, error; 871 int rthdrlen; 872 873 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 874 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 875 scmsgp->cmsg_level = IPPROTO_IPV6; 876 scmsgp->cmsg_type = IPV6_RTHDR; 877 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 878 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 879 IPV6_RTHDR_TYPE_0, argc - 1); 880 if (rthdr == NULL) 881 errx(1, "can't initialize rthdr"); 882 883 for (hops = 0; hops < argc - 1; hops++) { 884 struct addrinfo *iaip; 885 886 if ((error = getaddrinfo(argv[hops], NULL, &hints, 887 &iaip))) 888 errx(1, "%s", gai_strerror(error)); 889 if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6) 890 errx(1, 891 "bad addr family of an intermediate addr"); 892 893 if (inet6_rth_add(rthdr, 894 &(SIN6(iaip->ai_addr))->sin6_addr)) 895 errx(1, "can't add an intermediate node"); 896 freeaddrinfo(iaip); 897 } 898 899 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 900 } 901 902 if (!(options & F_SRCADDR)) { 903 /* 904 * get the source address. XXX since we revoked the root 905 * privilege, we cannot use a raw socket for this. 906 */ 907 int dummy; 908 socklen_t len = sizeof(src); 909 910 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 911 err(1, "UDP socket"); 912 913 src.sin6_family = AF_INET6; 914 src.sin6_addr = dst.sin6_addr; 915 src.sin6_port = ntohs(DUMMY_PORT); 916 src.sin6_scope_id = dst.sin6_scope_id; 917 918 if (pktinfo && 919 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 920 (void *)pktinfo, sizeof(*pktinfo))) 921 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 922 923 if (hoplimit != -1 && 924 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 925 (void *)&hoplimit, sizeof(hoplimit))) 926 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); 927 928 if (hoplimit != -1 && 929 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 930 (void *)&hoplimit, sizeof(hoplimit))) 931 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); 932 933 if (rthdr && 934 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 935 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 936 err(1, "UDP setsockopt(IPV6_RTHDR)"); 937 938 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 939 err(1, "UDP connect"); 940 941 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 942 err(1, "getsockname"); 943 944 close(dummy); 945 } 946 947 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 948 if (sockbufsize) { 949 if (datalen > sockbufsize) 950 warnx("you need -b to increase socket buffer size"); 951 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 952 sizeof(sockbufsize)) < 0) 953 err(1, "setsockopt(SO_SNDBUF)"); 954 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 955 sizeof(sockbufsize)) < 0) 956 err(1, "setsockopt(SO_RCVBUF)"); 957 } 958 else { 959 if (datalen > 8 * 1024) /*XXX*/ 960 warnx("you need -b to increase socket buffer size"); 961 /* 962 * When pinging the broadcast address, you can get a lot of 963 * answers. Doing something so evil is useful if you are trying 964 * to stress the ethernet, or just want to fill the arp cache 965 * to get some stuff for /etc/ethers. 966 */ 967 hold = 48 * 1024; 968 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 969 sizeof(hold)); 970 } 971 #endif 972 973 optval = 1; 974 #ifndef USE_SIN6_SCOPE_ID 975 #ifdef IPV6_RECVPKTINFO 976 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 977 sizeof(optval)) < 0) 978 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 979 #else /* old adv. API */ 980 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 981 sizeof(optval)) < 0) 982 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 983 #endif 984 #endif /* USE_SIN6_SCOPE_ID */ 985 #ifdef IPV6_RECVHOPLIMIT 986 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 987 sizeof(optval)) < 0) 988 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 989 #else /* old adv. API */ 990 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 991 sizeof(optval)) < 0) 992 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 993 #endif 994 995 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 996 (unsigned long)(pingerlen() - 8)); 997 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 998 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 999 1000 while (preload--) /* Fire off them quickies. */ 1001 (void)pinger(); 1002 1003 (void)signal(SIGINT, onsignal); 1004 #ifdef SIGINFO 1005 (void)signal(SIGINFO, onsignal); 1006 #endif 1007 1008 if ((options & F_FLOOD) == 0) { 1009 (void)signal(SIGALRM, onsignal); 1010 itimer.it_interval = interval; 1011 itimer.it_value = interval; 1012 (void)setitimer(ITIMER_REAL, &itimer, NULL); 1013 if (ntransmitted == 0) 1014 retransmit(); 1015 } 1016 1017 seenalrm = seenint = 0; 1018 #ifdef SIGINFO 1019 seeninfo = 0; 1020 #endif 1021 1022 for (;;) { 1023 struct msghdr m; 1024 u_char buf[1024]; 1025 struct iovec iov[2]; 1026 1027 /* signal handling */ 1028 if (seenalrm) { 1029 retransmit(); 1030 seenalrm = 0; 1031 continue; 1032 } 1033 if (seenint) { 1034 onint(SIGINT); 1035 seenint = 0; 1036 continue; 1037 } 1038 #ifdef SIGINFO 1039 if (seeninfo) { 1040 summary(); 1041 seeninfo = 0; 1042 continue; 1043 } 1044 #endif 1045 1046 if (options & F_FLOOD) { 1047 (void)pinger(); 1048 timeout = 10; 1049 } else { 1050 timeout = INFTIM; 1051 } 1052 fdmaskp[0].fd = s; 1053 fdmaskp[0].events = POLLIN; 1054 cc = poll(fdmaskp, 1, timeout); 1055 if (cc < 0) { 1056 if (errno != EINTR) { 1057 warn("poll"); 1058 sleep(1); 1059 } 1060 continue; 1061 } else if (cc == 0) 1062 continue; 1063 1064 m.msg_name = (caddr_t)&from; 1065 m.msg_namelen = sizeof(from); 1066 memset(&iov, 0, sizeof(iov)); 1067 iov[0].iov_base = (caddr_t)packet; 1068 iov[0].iov_len = packlen; 1069 m.msg_iov = iov; 1070 m.msg_iovlen = 1; 1071 m.msg_control = (caddr_t)buf; 1072 m.msg_controllen = sizeof(buf); 1073 1074 cc = recvmsg(s, &m, 0); 1075 if (cc < 0) { 1076 if (errno != EINTR) { 1077 warn("recvmsg"); 1078 sleep(1); 1079 } 1080 continue; 1081 } else if (cc == 0) { 1082 int mtu; 1083 1084 /* 1085 * receive control messages only. Process the 1086 * exceptions (currently the only possiblity is 1087 * a path MTU notification.) 1088 */ 1089 if ((mtu = get_pathmtu(&m)) > 0) { 1090 if ((options & F_VERBOSE) != 0) { 1091 printf("new path MTU (%d) is " 1092 "notified\n", mtu); 1093 } 1094 } 1095 continue; 1096 } else { 1097 /* 1098 * an ICMPv6 message (probably an echoreply) arrived. 1099 */ 1100 pr_pack(packet, cc, &m); 1101 } 1102 if (npackets && nreceived >= npackets) 1103 break; 1104 } 1105 summary(); 1106 exit(nreceived == 0); 1107 } 1108 1109 static void 1110 onsignal(int sig) 1111 { 1112 1113 switch (sig) { 1114 case SIGALRM: 1115 seenalrm++; 1116 break; 1117 case SIGINT: 1118 seenint++; 1119 break; 1120 #ifdef SIGINFO 1121 case SIGINFO: 1122 seeninfo++; 1123 break; 1124 #endif 1125 } 1126 } 1127 1128 /* 1129 * retransmit -- 1130 * This routine transmits another ping6. 1131 */ 1132 static void 1133 retransmit(void) 1134 { 1135 struct itimerval itimer; 1136 1137 if (pinger() == 0) 1138 return; 1139 1140 /* 1141 * If we're not transmitting any more packets, change the timer 1142 * to wait two round-trip times if we've received any packets or 1143 * ten seconds if we haven't. 1144 */ 1145 #define MAXWAIT 10 1146 if (nreceived) { 1147 itimer.it_value.tv_sec = 2 * tmax / 1000; 1148 if (itimer.it_value.tv_sec == 0) 1149 itimer.it_value.tv_sec = 1; 1150 } else 1151 itimer.it_value.tv_sec = MAXWAIT; 1152 itimer.it_interval.tv_sec = 0; 1153 itimer.it_interval.tv_usec = 0; 1154 itimer.it_value.tv_usec = 0; 1155 1156 (void)signal(SIGALRM, onint); 1157 (void)setitimer(ITIMER_REAL, &itimer, NULL); 1158 } 1159 1160 /* 1161 * pinger -- 1162 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1163 * will be added on by the kernel. The ID field is our UNIX process ID, 1164 * and the sequence number is an ascending integer. The first 8 bytes 1165 * of the data portion are used to hold a UNIX "timeval" struct in VAX 1166 * byte-order, to compute the round-trip time. 1167 */ 1168 static size_t 1169 pingerlen(void) 1170 { 1171 size_t l; 1172 1173 if (options & F_FQDN) 1174 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1175 else if (options & F_FQDNOLD) 1176 l = ICMP6_NIQLEN; 1177 else if (options & F_NODEADDR) 1178 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1179 else if (options & F_SUPTYPES) 1180 l = ICMP6_NIQLEN; 1181 else 1182 l = ICMP6ECHOLEN + datalen; 1183 1184 return l; 1185 } 1186 1187 static int 1188 pinger(void) 1189 { 1190 struct icmp6_hdr *icp; 1191 struct iovec iov[2]; 1192 int i, cc; 1193 struct icmp6_nodeinfo *nip; 1194 uint16_t seq; 1195 1196 if (npackets && ntransmitted >= npackets) 1197 return(-1); /* no more transmission */ 1198 1199 icp = (struct icmp6_hdr *)outpack; 1200 nip = (struct icmp6_nodeinfo *)outpack; 1201 memset(icp, 0, sizeof(*icp)); 1202 icp->icmp6_cksum = 0; 1203 seq = ntransmitted++; 1204 CLR(seq % mx_dup_ck); 1205 seq = ntohs(seq); 1206 1207 if (options & F_FQDN) { 1208 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1209 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1210 nip->ni_flags = htons(0); 1211 1212 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1213 sizeof(dst.sin6_addr)); 1214 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1215 } else if (options & F_FQDNOLD) { 1216 /* packet format in 03 draft - no Subject data on queries */ 1217 icp->icmp6_code = 0; /* code field is always 0 */ 1218 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1219 nip->ni_flags = htons(0); 1220 1221 cc = ICMP6_NIQLEN; 1222 } else if (options & F_NODEADDR) { 1223 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1224 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1225 nip->ni_flags = naflags; 1226 1227 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1228 sizeof(dst.sin6_addr)); 1229 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1230 } else if (options & F_SUPTYPES) { 1231 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1232 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1233 /* we support compressed bitmap */ 1234 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1235 1236 cc = ICMP6_NIQLEN; 1237 } else 1238 cc = 0; /* XXX: gcc */ 1239 1240 if (options & (F_FQDN|F_FQDNOLD|F_NODEADDR|F_SUPTYPES)) { 1241 icp->icmp6_type = ICMP6_NI_QUERY; 1242 memcpy(nip->icmp6_ni_nonce, nonce, 1243 sizeof(nip->icmp6_ni_nonce)); 1244 memcpy(nip->icmp6_ni_nonce, &seq, sizeof(seq)); 1245 datalen = 0; 1246 } else { 1247 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1248 icp->icmp6_code = 0; 1249 icp->icmp6_id = htons(ident); 1250 icp->icmp6_seq = seq; 1251 if (timing) { 1252 struct timeval tv; 1253 struct tv32 *tv32; 1254 (void)gettimeofday(&tv, NULL); 1255 tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN]; 1256 tv32->tv32_sec = htonl(tv.tv_sec); 1257 tv32->tv32_usec = htonl(tv.tv_usec); 1258 } 1259 cc = ICMP6ECHOLEN + datalen; 1260 } 1261 1262 #ifdef DIAGNOSTIC 1263 if (pingerlen() != cc) 1264 errx(1, "internal error; length mismatch"); 1265 #endif 1266 1267 smsghdr.msg_name = (caddr_t)&dst; 1268 smsghdr.msg_namelen = sizeof(dst); 1269 memset(&iov, 0, sizeof(iov)); 1270 iov[0].iov_base = (caddr_t)outpack; 1271 iov[0].iov_len = cc; 1272 smsghdr.msg_iov = iov; 1273 smsghdr.msg_iovlen = 1; 1274 1275 i = sendmsg(s, &smsghdr, 0); 1276 1277 if (i < 0 || i != cc) { 1278 if (i < 0) 1279 warn("sendmsg"); 1280 (void)printf("ping6: wrote %s %d chars, ret=%d\n", 1281 hostname, cc, i); 1282 } 1283 if (!(options & F_QUIET) && options & F_FLOOD) 1284 (void)write(STDOUT_FILENO, &DOT, 1); 1285 1286 return(0); 1287 } 1288 1289 static int 1290 myechoreply(const struct icmp6_hdr *icp) 1291 { 1292 if (ntohs(icp->icmp6_id) == ident) 1293 return 1; 1294 else 1295 return 0; 1296 } 1297 1298 static int 1299 mynireply(const struct icmp6_nodeinfo *nip) 1300 { 1301 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1302 nonce + sizeof(u_int16_t), 1303 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1304 return 1; 1305 else 1306 return 0; 1307 } 1308 1309 static char * 1310 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf, 1311 size_t bufsiz) 1312 { 1313 int i; 1314 const u_char *cp; 1315 char cresult[MAXDNAME + 1]; 1316 const u_char *comp; 1317 int l; 1318 1319 i = 0; /* XXXGCC -Wuninitialized [sun2] */ 1320 1321 cp = *sp; 1322 *buf = '\0'; 1323 1324 if (cp >= ep) 1325 return NULL; 1326 while (cp < ep) { 1327 i = *cp; 1328 if (i == 0 || cp != *sp) { 1329 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz) 1330 return NULL; /*result overrun*/ 1331 } 1332 if (i == 0) 1333 break; 1334 cp++; 1335 1336 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1337 /* DNS compression */ 1338 if (!base) 1339 return NULL; 1340 1341 comp = base + (i & 0x3f); 1342 if (dnsdecode(&comp, cp, base, cresult, 1343 sizeof(cresult)) == NULL) 1344 return NULL; 1345 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1346 return NULL; /*result overrun*/ 1347 break; 1348 } else if ((i & 0x3f) == i) { 1349 if (i > ep - cp) 1350 return NULL; /*source overrun*/ 1351 while (i-- > 0 && cp < ep) { 1352 l = snprintf(cresult, sizeof(cresult), 1353 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1354 if (l >= (int)sizeof(cresult) || l < 0) 1355 return NULL; 1356 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1357 return NULL; /*result overrun*/ 1358 cp++; 1359 } 1360 } else 1361 return NULL; /*invalid label*/ 1362 } 1363 if (i != 0) 1364 return NULL; /*not terminated*/ 1365 cp++; 1366 *sp = cp; 1367 return buf; 1368 } 1369 1370 /* 1371 * pr_pack -- 1372 * Print out the packet, if it came from us. This logic is necessary 1373 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1374 * which arrive ('tis only fair). This permits multiple copies of this 1375 * program to be run without having intermingled output (or statistics!). 1376 */ 1377 static void 1378 pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1379 { 1380 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1381 struct icmp6_hdr *icp; 1382 struct icmp6_nodeinfo *ni; 1383 int i; 1384 int hoplim; 1385 struct sockaddr *from; 1386 int fromlen; 1387 u_char *cp = NULL, *dp, *end = buf + cc; 1388 struct in6_pktinfo *pktinfo = NULL; 1389 struct timeval tv, tp; 1390 struct tv32 *tpp; 1391 double triptime = 0; 1392 int dupflag; 1393 size_t off; 1394 int oldfqdn; 1395 u_int16_t seq; 1396 char dnsname[MAXDNAME + 1]; 1397 1398 (void)gettimeofday(&tv, NULL); 1399 1400 if (!mhdr || !mhdr->msg_name || 1401 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1402 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1403 if (options & F_VERBOSE) 1404 warnx("invalid peername"); 1405 return; 1406 } 1407 from = (struct sockaddr *)mhdr->msg_name; 1408 fromlen = mhdr->msg_namelen; 1409 if (cc < (int)sizeof(struct icmp6_hdr)) { 1410 if (options & F_VERBOSE) 1411 warnx("packet too short (%d bytes) from %s", cc, 1412 pr_addr(from, fromlen)); 1413 return; 1414 } 1415 icp = (struct icmp6_hdr *)buf; 1416 ni = (struct icmp6_nodeinfo *)buf; 1417 off = 0; 1418 1419 if ((hoplim = get_hoplim(mhdr)) == -1) { 1420 warnx("failed to get receiving hop limit"); 1421 return; 1422 } 1423 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1424 warnx("failed to get receiving packet information"); 1425 return; 1426 } 1427 1428 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1429 seq = ntohs(icp->icmp6_seq); 1430 ++nreceived; 1431 if (timing) { 1432 tpp = (struct tv32 *)(icp + 1); 1433 tp.tv_sec = ntohl(tpp->tv32_sec); 1434 tp.tv_usec = ntohl(tpp->tv32_usec); 1435 tvsub(&tv, &tp); 1436 triptime = ((double)tv.tv_sec) * 1000.0 + 1437 ((double)tv.tv_usec) / 1000.0; 1438 tsum += triptime; 1439 tsumsq += triptime * triptime; 1440 if (triptime < tmin) 1441 tmin = triptime; 1442 if (triptime > tmax) 1443 tmax = triptime; 1444 } 1445 1446 if (TST(seq % mx_dup_ck)) { 1447 ++nrepeats; 1448 --nreceived; 1449 dupflag = 1; 1450 } else { 1451 SET(seq % mx_dup_ck); 1452 dupflag = 0; 1453 } 1454 1455 if (options & F_QUIET) 1456 return; 1457 1458 if (options & F_FLOOD) 1459 (void)write(STDOUT_FILENO, &BSPACE, 1); 1460 else { 1461 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1462 pr_addr(from, fromlen), seq); 1463 (void)printf(" hlim=%d", hoplim); 1464 if ((options & F_VERBOSE) != 0) { 1465 struct sockaddr_in6 dstsa; 1466 1467 memset(&dstsa, 0, sizeof(dstsa)); 1468 dstsa.sin6_family = AF_INET6; 1469 #ifdef SIN6_LEN 1470 dstsa.sin6_len = sizeof(dstsa); 1471 #endif 1472 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1473 dstsa.sin6_addr = pktinfo->ipi6_addr; 1474 (void)printf(" dst=%s", 1475 pr_addr((struct sockaddr *)&dstsa, 1476 sizeof(dstsa))); 1477 } 1478 if (timing) 1479 (void)printf(" time=%.3f ms", triptime); 1480 if (dupflag) 1481 (void)printf("(DUP!)"); 1482 /* check the data */ 1483 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1484 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1485 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1486 if (*cp != *dp) { 1487 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1488 break; 1489 } 1490 } 1491 } 1492 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1493 memcpy(&seq, ni->icmp6_ni_nonce, sizeof(seq)); 1494 seq = ntohs(seq); 1495 ++nreceived; 1496 if (TST(seq % mx_dup_ck)) { 1497 ++nrepeats; 1498 --nreceived; 1499 dupflag = 1; 1500 } else { 1501 SET(seq % mx_dup_ck); 1502 dupflag = 0; 1503 } 1504 1505 if (options & F_QUIET) 1506 return; 1507 1508 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1509 1510 switch (ntohs(ni->ni_code)) { 1511 case ICMP6_NI_SUCCESS: 1512 break; 1513 case ICMP6_NI_REFUSED: 1514 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1515 goto fqdnend; 1516 case ICMP6_NI_UNKNOWN: 1517 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1518 goto fqdnend; 1519 default: 1520 printf("unknown code 0x%x, type 0x%x", 1521 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1522 goto fqdnend; 1523 } 1524 1525 switch (ntohs(ni->ni_qtype)) { 1526 case NI_QTYPE_NOOP: 1527 printf("NodeInfo NOOP"); 1528 break; 1529 case NI_QTYPE_SUPTYPES: 1530 pr_suptypes(ni, end - (u_char *)ni); 1531 break; 1532 case NI_QTYPE_NODEADDR: 1533 pr_nodeaddr(ni, end - (u_char *)ni); 1534 break; 1535 case NI_QTYPE_FQDN: 1536 default: /* XXX: for backward compatibility */ 1537 cp = (u_char *)ni + ICMP6_NIRLEN; 1538 if (buf[off + ICMP6_NIRLEN] == 1539 cc - off - ICMP6_NIRLEN - 1) 1540 oldfqdn = 1; 1541 else 1542 oldfqdn = 0; 1543 if (oldfqdn) { 1544 cp++; /* skip length */ 1545 while (cp < end) { 1546 safeputc(*cp & 0xff); 1547 cp++; 1548 } 1549 } else { 1550 i = 0; 1551 while (cp < end) { 1552 if (dnsdecode((void *)&cp, end, 1553 (const u_char *)(ni + 1), dnsname, 1554 sizeof(dnsname)) == NULL) { 1555 printf("???"); 1556 break; 1557 } 1558 /* 1559 * name-lookup special handling for 1560 * truncated name 1561 */ 1562 if (cp + 1 <= end && !*cp && 1563 strlen(dnsname) > 0) { 1564 dnsname[strlen(dnsname) - 1] = '\0'; 1565 cp++; 1566 } 1567 printf("%s%s", i > 0 ? "," : "", 1568 dnsname); 1569 } 1570 } 1571 if (options & F_VERBOSE) { 1572 int32_t ttl; 1573 int comma = 0; 1574 1575 (void)printf(" ("); /*)*/ 1576 1577 switch (ni->ni_code) { 1578 case ICMP6_NI_REFUSED: 1579 (void)printf("refused"); 1580 comma++; 1581 break; 1582 case ICMP6_NI_UNKNOWN: 1583 (void)printf("unknown qtype"); 1584 comma++; 1585 break; 1586 } 1587 1588 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1589 /* case of refusion, unknown */ 1590 /*(*/ 1591 putchar(')'); 1592 goto fqdnend; 1593 } 1594 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]); 1595 if (comma) 1596 printf(","); 1597 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1598 (void)printf("TTL=%d:meaningless", 1599 (int)ttl); 1600 } else { 1601 if (ttl < 0) { 1602 (void)printf("TTL=%d:invalid", 1603 ttl); 1604 } else 1605 (void)printf("TTL=%d", ttl); 1606 } 1607 comma++; 1608 1609 if (oldfqdn) { 1610 if (comma) 1611 printf(","); 1612 printf("03 draft"); 1613 comma++; 1614 } else { 1615 cp = (u_char *)ni + ICMP6_NIRLEN; 1616 if (cp == end) { 1617 if (comma) 1618 printf(","); 1619 printf("no name"); 1620 comma++; 1621 } 1622 } 1623 1624 if (buf[off + ICMP6_NIRLEN] != 1625 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1626 if (comma) 1627 printf(","); 1628 (void)printf("invalid namelen:%d/%lu", 1629 buf[off + ICMP6_NIRLEN], 1630 (u_long)cc - off - ICMP6_NIRLEN - 1); 1631 comma++; 1632 } 1633 /*(*/ 1634 putchar(')'); 1635 } 1636 fqdnend: 1637 ; 1638 } 1639 } else { 1640 /* We've got something other than an ECHOREPLY */ 1641 if (!(options & F_VERBOSE)) 1642 return; 1643 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1644 pr_icmph(icp, end); 1645 } 1646 1647 if (!(options & F_FLOOD)) { 1648 (void)putchar('\n'); 1649 if (options & F_VERBOSE) 1650 pr_exthdrs(mhdr); 1651 (void)fflush(stdout); 1652 } 1653 #undef safeputc 1654 } 1655 1656 static void 1657 pr_exthdrs(struct msghdr *mhdr) 1658 { 1659 struct cmsghdr *cm; 1660 1661 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1662 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1663 if (cm->cmsg_level != IPPROTO_IPV6) 1664 continue; 1665 1666 switch (cm->cmsg_type) { 1667 case IPV6_HOPOPTS: 1668 printf(" HbH Options: "); 1669 pr_ip6opt(CMSG_DATA(cm)); 1670 break; 1671 case IPV6_DSTOPTS: 1672 #ifdef IPV6_RTHDRDSTOPTS 1673 case IPV6_RTHDRDSTOPTS: 1674 #endif 1675 printf(" Dst Options: "); 1676 pr_ip6opt(CMSG_DATA(cm)); 1677 break; 1678 case IPV6_RTHDR: 1679 printf(" Routing: "); 1680 pr_rthdr(CMSG_DATA(cm)); 1681 break; 1682 } 1683 } 1684 } 1685 1686 static void 1687 pr_ip6opt(void *extbuf) 1688 { 1689 struct ip6_hbh *ext; 1690 int currentlen; 1691 u_int8_t type; 1692 size_t extlen; 1693 socklen_t len; 1694 void *databuf; 1695 size_t offset; 1696 u_int16_t value2; 1697 u_int32_t value4; 1698 1699 ext = (struct ip6_hbh *)extbuf; 1700 extlen = (ext->ip6h_len + 1) * 8; 1701 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1702 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1703 1704 currentlen = 0; 1705 while (1) { 1706 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1707 &type, &len, &databuf); 1708 if (currentlen == -1) 1709 break; 1710 switch (type) { 1711 /* 1712 * Note that inet6_opt_next automatically skips any padding 1713 * optins. 1714 */ 1715 case IP6OPT_JUMBO: 1716 offset = 0; 1717 offset = inet6_opt_get_val(databuf, offset, 1718 &value4, sizeof(value4)); 1719 printf(" Jumbo Payload Opt: Length %u\n", 1720 (u_int32_t)ntohl(value4)); 1721 break; 1722 case IP6OPT_ROUTER_ALERT: 1723 offset = 0; 1724 offset = inet6_opt_get_val(databuf, offset, 1725 &value2, sizeof(value2)); 1726 printf(" Router Alert Opt: Type %u\n", 1727 ntohs(value2)); 1728 break; 1729 default: 1730 printf(" Received Opt %u len %lu\n", 1731 type, (unsigned long)len); 1732 break; 1733 } 1734 } 1735 return; 1736 } 1737 1738 static void 1739 pr_rthdr(void *extbuf) 1740 { 1741 struct in6_addr *in6; 1742 char ntopbuf[INET6_ADDRSTRLEN]; 1743 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1744 int i, segments; 1745 1746 /* print fixed part of the header */ 1747 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1748 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1749 if ((segments = inet6_rth_segments(extbuf)) >= 0) 1750 printf("%d segments, ", segments); 1751 else 1752 printf("segments unknown, "); 1753 printf("%d left\n", rh->ip6r_segleft); 1754 1755 for (i = 0; i < segments; i++) { 1756 in6 = inet6_rth_getaddr(extbuf, i); 1757 if (in6 == NULL) 1758 printf(" [%d]<NULL>\n", i); 1759 else { 1760 if (!inet_ntop(AF_INET6, in6, ntopbuf, 1761 sizeof(ntopbuf))) 1762 strlcpy(ntopbuf, "?", sizeof(ntopbuf)); 1763 printf(" [%d]%s\n", i, ntopbuf); 1764 } 1765 } 1766 1767 return; 1768 1769 } 1770 1771 static int 1772 pr_bitrange(u_int32_t v, int soff, int ii) 1773 { 1774 int off; 1775 int i; 1776 1777 off = 0; 1778 while (off < 32) { 1779 /* shift till we have 0x01 */ 1780 if ((v & 0x01) == 0) { 1781 if (ii > 1) 1782 printf("-%u", soff + off - 1); 1783 ii = 0; 1784 switch (v & 0x0f) { 1785 case 0x00: 1786 v >>= 4; 1787 off += 4; 1788 continue; 1789 case 0x08: 1790 v >>= 3; 1791 off += 3; 1792 continue; 1793 case 0x04: case 0x0c: 1794 v >>= 2; 1795 off += 2; 1796 continue; 1797 default: 1798 v >>= 1; 1799 off += 1; 1800 continue; 1801 } 1802 } 1803 1804 /* we have 0x01 with us */ 1805 for (i = 0; i < 32 - off; i++) { 1806 if ((v & (0x01 << i)) == 0) 1807 break; 1808 } 1809 if (!ii) 1810 printf(" %u", soff + off); 1811 ii += i; 1812 v >>= i; off += i; 1813 } 1814 return ii; 1815 } 1816 1817 static void 1818 pr_suptypes(struct icmp6_nodeinfo *ni /* ni->qtype must be SUPTYPES */, 1819 size_t nilen) 1820 { 1821 size_t clen; 1822 u_int32_t v; 1823 const u_char *cp, *end; 1824 u_int16_t cur; 1825 struct cbit { 1826 u_int16_t words; /*32bit count*/ 1827 u_int16_t skip; 1828 } cbit; 1829 #define MAXQTYPES (1 << 16) 1830 size_t off; 1831 int b; 1832 1833 cp = (u_char *)(ni + 1); 1834 end = ((u_char *)ni) + nilen; 1835 cur = 0; 1836 b = 0; 1837 1838 printf("NodeInfo Supported Qtypes"); 1839 if (options & F_VERBOSE) { 1840 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 1841 printf(", compressed bitmap"); 1842 else 1843 printf(", raw bitmap"); 1844 } 1845 1846 while (cp < end) { 1847 clen = (size_t)(end - cp); 1848 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 1849 if (clen == 0 || clen > MAXQTYPES / 8 || 1850 clen % sizeof(v)) { 1851 printf("???"); 1852 return; 1853 } 1854 } else { 1855 if (clen < sizeof(cbit) || clen % sizeof(v)) 1856 return; 1857 memcpy(&cbit, cp, sizeof(cbit)); 1858 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 1859 clen) 1860 return; 1861 cp += sizeof(cbit); 1862 clen = ntohs(cbit.words) * sizeof(v); 1863 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 1864 MAXQTYPES) 1865 return; 1866 } 1867 1868 for (off = 0; off < clen; off += sizeof(v)) { 1869 memcpy(&v, cp + off, sizeof(v)); 1870 v = (u_int32_t)ntohl(v); 1871 b = pr_bitrange(v, (int)(cur + off * 8), b); 1872 } 1873 /* flush the remaining bits */ 1874 b = pr_bitrange(0, (int)(cur + off * 8), b); 1875 1876 cp += clen; 1877 cur += clen * 8; 1878 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 1879 cur += ntohs(cbit.skip) * 32; 1880 } 1881 } 1882 1883 static void 1884 pr_nodeaddr(struct icmp6_nodeinfo *ni, /* ni->qtype must be NODEADDR */ 1885 int nilen) 1886 { 1887 u_char *cp = (u_char *)(ni + 1); 1888 char ntop_buf[INET6_ADDRSTRLEN]; 1889 int withttl = 0; 1890 1891 nilen -= sizeof(struct icmp6_nodeinfo); 1892 1893 if (options & F_VERBOSE) { 1894 switch (ni->ni_code) { 1895 case ICMP6_NI_REFUSED: 1896 (void)printf("refused"); 1897 break; 1898 case ICMP6_NI_UNKNOWN: 1899 (void)printf("unknown qtype"); 1900 break; 1901 } 1902 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 1903 (void)printf(" truncated"); 1904 } 1905 putchar('\n'); 1906 if (nilen <= 0) 1907 printf(" no address\n"); 1908 1909 /* 1910 * In icmp-name-lookups 05 and later, TTL of each returned address 1911 * is contained in the resposne. We try to detect the version 1912 * by the length of the data, but note that the detection algorithm 1913 * is incomplete. We assume the latest draft by default. 1914 */ 1915 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 1916 withttl = 1; 1917 while (nilen > 0) { 1918 u_int32_t ttl = 0; 1919 1920 if (withttl) { 1921 /* XXX: alignment? */ 1922 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp); 1923 cp += sizeof(u_int32_t); 1924 nilen -= sizeof(u_int32_t); 1925 } 1926 1927 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 1928 NULL) 1929 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 1930 printf(" %s", ntop_buf); 1931 if (withttl) { 1932 if (ttl == 0xffffffff) { 1933 /* 1934 * XXX: can this convention be applied to all 1935 * type of TTL (i.e. non-ND TTL)? 1936 */ 1937 printf("(TTL=infty)"); 1938 } 1939 else 1940 printf("(TTL=%u)", ttl); 1941 } 1942 putchar('\n'); 1943 1944 nilen -= sizeof(struct in6_addr); 1945 cp += sizeof(struct in6_addr); 1946 } 1947 } 1948 1949 static int 1950 get_hoplim(struct msghdr *mhdr) 1951 { 1952 struct cmsghdr *cm; 1953 1954 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1955 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1956 if (cm->cmsg_len == 0) 1957 return(-1); 1958 1959 if (cm->cmsg_level == IPPROTO_IPV6 && 1960 cm->cmsg_type == IPV6_HOPLIMIT && 1961 cm->cmsg_len == CMSG_LEN(sizeof(int))) 1962 return(*(int *)CMSG_DATA(cm)); 1963 } 1964 1965 return(-1); 1966 } 1967 1968 static struct in6_pktinfo * 1969 get_rcvpktinfo(struct msghdr *mhdr) 1970 { 1971 struct cmsghdr *cm; 1972 1973 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1974 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1975 if (cm->cmsg_len == 0) 1976 return(NULL); 1977 1978 if (cm->cmsg_level == IPPROTO_IPV6 && 1979 cm->cmsg_type == IPV6_PKTINFO && 1980 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) 1981 return((struct in6_pktinfo *)CMSG_DATA(cm)); 1982 } 1983 1984 return(NULL); 1985 } 1986 1987 static int 1988 get_pathmtu(struct msghdr *mhdr) 1989 { 1990 #ifdef IPV6_RECVPATHMTU 1991 struct cmsghdr *cm; 1992 struct ip6_mtuinfo *mtuctl = NULL; 1993 1994 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1995 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1996 if (cm->cmsg_len == 0) 1997 return(0); 1998 1999 if (cm->cmsg_level == IPPROTO_IPV6 && 2000 cm->cmsg_type == IPV6_PATHMTU && 2001 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2002 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm); 2003 2004 /* 2005 * If the notified destination is different from 2006 * the one we are pinging, just ignore the info. 2007 * We check the scope ID only when both notified value 2008 * and our own value have non-0 values, because we may 2009 * have used the default scope zone ID for sending, 2010 * in which case the scope ID value is 0. 2011 */ 2012 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr, 2013 &dst.sin6_addr) || 2014 (mtuctl->ip6m_addr.sin6_scope_id && 2015 dst.sin6_scope_id && 2016 mtuctl->ip6m_addr.sin6_scope_id != 2017 dst.sin6_scope_id)) { 2018 if ((options & F_VERBOSE) != 0) { 2019 printf("path MTU for %s is notified. " 2020 "(ignored)\n", 2021 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr, 2022 sizeof(mtuctl->ip6m_addr))); 2023 } 2024 return(0); 2025 } 2026 2027 /* 2028 * Ignore an invalid MTU. XXX: can we just believe 2029 * the kernel check? 2030 */ 2031 if (mtuctl->ip6m_mtu < IPV6_MMTU) 2032 return(0); 2033 2034 /* notification for our destination. return the MTU. */ 2035 return((int)mtuctl->ip6m_mtu); 2036 } 2037 } 2038 #endif 2039 return(0); 2040 } 2041 2042 /* 2043 * tvsub -- 2044 * Subtract 2 timeval structs: out = out - in. Out is assumed to 2045 * be >= in. 2046 */ 2047 static void 2048 tvsub(struct timeval *out, struct timeval *in) 2049 { 2050 if ((out->tv_usec -= in->tv_usec) < 0) { 2051 --out->tv_sec; 2052 out->tv_usec += 1000000; 2053 } 2054 out->tv_sec -= in->tv_sec; 2055 } 2056 2057 /* 2058 * onint -- 2059 * SIGINT handler. 2060 */ 2061 /* ARGSUSED */ 2062 static void 2063 onint(int notused) 2064 { 2065 summary(); 2066 2067 (void)signal(SIGINT, SIG_DFL); 2068 (void)kill(getpid(), SIGINT); 2069 2070 /* NOTREACHED */ 2071 exit(1); 2072 } 2073 2074 /* 2075 * summary -- 2076 * Print out statistics. 2077 */ 2078 static void 2079 summary(void) 2080 { 2081 2082 (void)printf("\n--- %s ping6 statistics ---\n", hostname); 2083 (void)printf("%ld packets transmitted, ", ntransmitted); 2084 (void)printf("%ld packets received, ", nreceived); 2085 if (nrepeats) 2086 (void)printf("+%ld duplicates, ", nrepeats); 2087 if (ntransmitted) { 2088 if (nreceived > ntransmitted) 2089 (void)printf("-- somebody's duplicating packets!"); 2090 else 2091 (void)printf("%.1f%% packet loss", 2092 ((((double)ntransmitted - nreceived) * 100.0) / 2093 ntransmitted)); 2094 } 2095 (void)putchar('\n'); 2096 if (nreceived && timing) { 2097 /* Only display average to microseconds */ 2098 double num = nreceived + nrepeats; 2099 double dev, avg; 2100 if (num > 1) { 2101 avg = tsum / num; 2102 dev = sqrt((tsumsq - num * avg * avg) / (num - 1)); 2103 } else { 2104 avg = tsum; 2105 dev = 0.0; 2106 } 2107 (void)printf( 2108 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2109 tmin, avg, tmax, dev); 2110 (void)fflush(stdout); 2111 } 2112 (void)fflush(stdout); 2113 } 2114 2115 /*subject type*/ 2116 static const char *niqcode[] = { 2117 "IPv6 address", 2118 "DNS label", /*or empty*/ 2119 "IPv4 address", 2120 }; 2121 2122 /*result code*/ 2123 static const char *nircode[] = { 2124 "Success", "Refused", "Unknown", 2125 }; 2126 2127 2128 /* 2129 * pr_icmph -- 2130 * Print a descriptive string about an ICMP header. 2131 */ 2132 static void 2133 pr_icmph(struct icmp6_hdr *icp, u_char *end) 2134 { 2135 char ntop_buf[INET6_ADDRSTRLEN]; 2136 struct nd_redirect *red; 2137 struct icmp6_nodeinfo *ni; 2138 char dnsname[MAXDNAME + 1]; 2139 const u_char *cp; 2140 size_t l; 2141 2142 switch (icp->icmp6_type) { 2143 case ICMP6_DST_UNREACH: 2144 switch (icp->icmp6_code) { 2145 case ICMP6_DST_UNREACH_NOROUTE: 2146 (void)printf("No Route to Destination\n"); 2147 break; 2148 case ICMP6_DST_UNREACH_ADMIN: 2149 (void)printf("Destination Administratively " 2150 "Unreachable\n"); 2151 break; 2152 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2153 (void)printf("Destination Unreachable Beyond Scope\n"); 2154 break; 2155 case ICMP6_DST_UNREACH_ADDR: 2156 (void)printf("Destination Host Unreachable\n"); 2157 break; 2158 case ICMP6_DST_UNREACH_NOPORT: 2159 (void)printf("Destination Port Unreachable\n"); 2160 break; 2161 default: 2162 (void)printf("Destination Unreachable, Bad Code: %d\n", 2163 icp->icmp6_code); 2164 break; 2165 } 2166 /* Print returned IP header information */ 2167 pr_retip((struct ip6_hdr *)(icp + 1), end); 2168 break; 2169 case ICMP6_PACKET_TOO_BIG: 2170 (void)printf("Packet too big mtu = %d\n", 2171 (int)ntohl(icp->icmp6_mtu)); 2172 pr_retip((struct ip6_hdr *)(icp + 1), end); 2173 break; 2174 case ICMP6_TIME_EXCEEDED: 2175 switch (icp->icmp6_code) { 2176 case ICMP6_TIME_EXCEED_TRANSIT: 2177 (void)printf("Time to live exceeded\n"); 2178 break; 2179 case ICMP6_TIME_EXCEED_REASSEMBLY: 2180 (void)printf("Frag reassembly time exceeded\n"); 2181 break; 2182 default: 2183 (void)printf("Time exceeded, Bad Code: %d\n", 2184 icp->icmp6_code); 2185 break; 2186 } 2187 pr_retip((struct ip6_hdr *)(icp + 1), end); 2188 break; 2189 case ICMP6_PARAM_PROB: 2190 (void)printf("Parameter problem: "); 2191 switch (icp->icmp6_code) { 2192 case ICMP6_PARAMPROB_HEADER: 2193 (void)printf("Erroneous Header "); 2194 break; 2195 case ICMP6_PARAMPROB_NEXTHEADER: 2196 (void)printf("Unknown Nextheader "); 2197 break; 2198 case ICMP6_PARAMPROB_OPTION: 2199 (void)printf("Unrecognized Option "); 2200 break; 2201 default: 2202 (void)printf("Bad code(%d) ", icp->icmp6_code); 2203 break; 2204 } 2205 (void)printf("pointer = 0x%02x\n", 2206 (u_int32_t)ntohl(icp->icmp6_pptr)); 2207 pr_retip((struct ip6_hdr *)(icp + 1), end); 2208 break; 2209 case ICMP6_ECHO_REQUEST: 2210 (void)printf("Echo Request"); 2211 /* XXX ID + Seq + Data */ 2212 break; 2213 case ICMP6_ECHO_REPLY: 2214 (void)printf("Echo Reply"); 2215 /* XXX ID + Seq + Data */ 2216 break; 2217 case ICMP6_MEMBERSHIP_QUERY: 2218 (void)printf("Listener Query"); 2219 break; 2220 case ICMP6_MEMBERSHIP_REPORT: 2221 (void)printf("Listener Report"); 2222 break; 2223 case ICMP6_MEMBERSHIP_REDUCTION: 2224 (void)printf("Listener Done"); 2225 break; 2226 case ND_ROUTER_SOLICIT: 2227 (void)printf("Router Solicitation"); 2228 break; 2229 case ND_ROUTER_ADVERT: 2230 (void)printf("Router Advertisement"); 2231 break; 2232 case ND_NEIGHBOR_SOLICIT: 2233 (void)printf("Neighbor Solicitation"); 2234 break; 2235 case ND_NEIGHBOR_ADVERT: 2236 (void)printf("Neighbor Advertisement"); 2237 break; 2238 case ND_REDIRECT: 2239 red = (struct nd_redirect *)icp; 2240 (void)printf("Redirect\n"); 2241 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2242 sizeof(ntop_buf))) 2243 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2244 (void)printf("Destination: %s", ntop_buf); 2245 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2246 sizeof(ntop_buf))) 2247 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2248 (void)printf(" New Target: %s", ntop_buf); 2249 break; 2250 case ICMP6_NI_QUERY: 2251 (void)printf("Node Information Query"); 2252 /* XXX ID + Seq + Data */ 2253 ni = (struct icmp6_nodeinfo *)icp; 2254 l = end - (u_char *)(ni + 1); 2255 printf(", "); 2256 switch (ntohs(ni->ni_qtype)) { 2257 case NI_QTYPE_NOOP: 2258 (void)printf("NOOP"); 2259 break; 2260 case NI_QTYPE_SUPTYPES: 2261 (void)printf("Supported qtypes"); 2262 break; 2263 case NI_QTYPE_FQDN: 2264 (void)printf("DNS name"); 2265 break; 2266 case NI_QTYPE_NODEADDR: 2267 (void)printf("nodeaddr"); 2268 break; 2269 case NI_QTYPE_IPV4ADDR: 2270 (void)printf("IPv4 nodeaddr"); 2271 break; 2272 default: 2273 (void)printf("unknown qtype"); 2274 break; 2275 } 2276 if (options & F_VERBOSE) { 2277 switch (ni->ni_code) { 2278 case ICMP6_NI_SUBJ_IPV6: 2279 if (l == sizeof(struct in6_addr) && 2280 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2281 sizeof(ntop_buf)) != NULL) { 2282 (void)printf(", subject=%s(%s)", 2283 niqcode[ni->ni_code], ntop_buf); 2284 } else { 2285 #if 1 2286 /* backward compat to -W */ 2287 (void)printf(", oldfqdn"); 2288 #else 2289 (void)printf(", invalid"); 2290 #endif 2291 } 2292 break; 2293 case ICMP6_NI_SUBJ_FQDN: 2294 if (end == (u_char *)(ni + 1)) { 2295 (void)printf(", no subject"); 2296 break; 2297 } 2298 printf(", subject=%s", niqcode[ni->ni_code]); 2299 cp = (const u_char *)(ni + 1); 2300 if (dnsdecode(&cp, end, NULL, dnsname, 2301 sizeof(dnsname)) != NULL) 2302 printf("(%s)", dnsname); 2303 else 2304 printf("(invalid)"); 2305 break; 2306 case ICMP6_NI_SUBJ_IPV4: 2307 if (l == sizeof(struct in_addr) && 2308 inet_ntop(AF_INET, ni + 1, ntop_buf, 2309 sizeof(ntop_buf)) != NULL) { 2310 (void)printf(", subject=%s(%s)", 2311 niqcode[ni->ni_code], ntop_buf); 2312 } else 2313 (void)printf(", invalid"); 2314 break; 2315 default: 2316 (void)printf(", invalid"); 2317 break; 2318 } 2319 } 2320 break; 2321 case ICMP6_NI_REPLY: 2322 (void)printf("Node Information Reply"); 2323 /* XXX ID + Seq + Data */ 2324 ni = (struct icmp6_nodeinfo *)icp; 2325 printf(", "); 2326 switch (ntohs(ni->ni_qtype)) { 2327 case NI_QTYPE_NOOP: 2328 (void)printf("NOOP"); 2329 break; 2330 case NI_QTYPE_SUPTYPES: 2331 (void)printf("Supported qtypes"); 2332 break; 2333 case NI_QTYPE_FQDN: 2334 (void)printf("DNS name"); 2335 break; 2336 case NI_QTYPE_NODEADDR: 2337 (void)printf("nodeaddr"); 2338 break; 2339 case NI_QTYPE_IPV4ADDR: 2340 (void)printf("IPv4 nodeaddr"); 2341 break; 2342 default: 2343 (void)printf("unknown qtype"); 2344 break; 2345 } 2346 if (options & F_VERBOSE) { 2347 if (ni->ni_code >= sizeof(nircode) / sizeof(nircode[0])) 2348 printf(", invalid"); 2349 else 2350 printf(", %s", nircode[ni->ni_code]); 2351 } 2352 break; 2353 default: 2354 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2355 } 2356 } 2357 2358 /* 2359 * pr_iph -- 2360 * Print an IP6 header. 2361 */ 2362 static void 2363 pr_iph(struct ip6_hdr *ip6) 2364 { 2365 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2366 u_int8_t tc; 2367 char ntop_buf[INET6_ADDRSTRLEN]; 2368 2369 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2370 tc = (tc >> 4) & 0x0f; 2371 tc |= (ip6->ip6_vfc << 4); 2372 2373 printf("Vr TC Flow Plen Nxt Hlim\n"); 2374 printf(" %1x %02x %05x %04x %02x %02x\n", 2375 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2376 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2377 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2378 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2379 printf("%s->", ntop_buf); 2380 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2381 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2382 printf("%s\n", ntop_buf); 2383 } 2384 2385 /* 2386 * pr_addr -- 2387 * Return an ascii host address as a dotted quad and optionally with 2388 * a hostname. 2389 */ 2390 static const char * 2391 pr_addr(struct sockaddr *addr, int addrlen) 2392 { 2393 static char buf[NI_MAXHOST]; 2394 int flag = 0; 2395 2396 if ((options & F_HOSTNAME) == 0) 2397 flag |= NI_NUMERICHOST; 2398 2399 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) 2400 return (buf); 2401 else 2402 return "?"; 2403 } 2404 2405 /* 2406 * pr_retip -- 2407 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2408 */ 2409 static void 2410 pr_retip(struct ip6_hdr *ip6, u_char *end) 2411 { 2412 u_char *cp = (u_char *)ip6, nh; 2413 int hlen; 2414 2415 if (end - (u_char *)ip6 < (intptr_t)sizeof(*ip6)) { 2416 printf("IP6"); 2417 goto trunc; 2418 } 2419 pr_iph(ip6); 2420 hlen = sizeof(*ip6); 2421 2422 nh = ip6->ip6_nxt; 2423 cp += hlen; 2424 while (end - cp >= 8) { 2425 switch (nh) { 2426 case IPPROTO_HOPOPTS: 2427 printf("HBH "); 2428 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2429 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2430 break; 2431 case IPPROTO_DSTOPTS: 2432 printf("DSTOPT "); 2433 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2434 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2435 break; 2436 case IPPROTO_FRAGMENT: 2437 printf("FRAG "); 2438 hlen = sizeof(struct ip6_frag); 2439 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2440 break; 2441 case IPPROTO_ROUTING: 2442 printf("RTHDR "); 2443 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2444 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2445 break; 2446 #ifdef IPSEC 2447 case IPPROTO_AH: 2448 printf("AH "); 2449 hlen = (((struct ip6_ext *)cp)->ip6e_len+2) << 2; 2450 nh = ((struct ip6_ext *)cp)->ip6e_nxt; 2451 break; 2452 #endif 2453 case IPPROTO_ICMPV6: 2454 printf("ICMP6: type = %d, code = %d\n", 2455 *cp, *(cp + 1)); 2456 return; 2457 case IPPROTO_ESP: 2458 printf("ESP\n"); 2459 return; 2460 case IPPROTO_TCP: 2461 printf("TCP: from port %u, to port %u (decimal)\n", 2462 (*cp * 256 + *(cp + 1)), 2463 (*(cp + 2) * 256 + *(cp + 3))); 2464 return; 2465 case IPPROTO_UDP: 2466 printf("UDP: from port %u, to port %u (decimal)\n", 2467 (*cp * 256 + *(cp + 1)), 2468 (*(cp + 2) * 256 + *(cp + 3))); 2469 return; 2470 default: 2471 printf("Unknown Header(%d)\n", nh); 2472 return; 2473 } 2474 2475 if ((cp += hlen) >= end) 2476 goto trunc; 2477 } 2478 if (end - cp < 8) 2479 goto trunc; 2480 2481 putchar('\n'); 2482 return; 2483 2484 trunc: 2485 printf("...\n"); 2486 return; 2487 } 2488 2489 static void 2490 fill(char *bp, char *patp) 2491 { 2492 int ii, jj, kk; 2493 int pat[16]; 2494 char *cp; 2495 2496 for (cp = patp; *cp; cp++) 2497 if (!isxdigit((unsigned char)*cp)) 2498 errx(1, "patterns must be specified as hex digits"); 2499 ii = sscanf(patp, 2500 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2501 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2502 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2503 &pat[13], &pat[14], &pat[15]); 2504 2505 /* xxx */ 2506 if (ii > 0) 2507 for (kk = 0; 2508 kk <= (int)(MAXDATALEN - (8 + sizeof(struct tv32) + ii)); 2509 kk += ii) 2510 for (jj = 0; jj < ii; ++jj) 2511 bp[jj + kk] = pat[jj]; 2512 if (!(options & F_QUIET)) { 2513 (void)printf("PATTERN: 0x"); 2514 for (jj = 0; jj < ii; ++jj) 2515 (void)printf("%02x", bp[jj] & 0xFF); 2516 (void)printf("\n"); 2517 } 2518 } 2519 2520 #ifdef IPSEC 2521 #ifdef IPSEC_POLICY_IPSEC 2522 static int 2523 setpolicy(int so, char *policy) 2524 { 2525 char *buf; 2526 2527 if (policy == NULL) 2528 return 0; /* ignore */ 2529 2530 buf = ipsec_set_policy(policy, strlen(policy)); 2531 if (buf == NULL) 2532 errx(1, "%s", ipsec_strerror()); 2533 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2534 ipsec_get_policylen(buf)) < 0) 2535 warnx("Unable to set IPsec policy"); 2536 free(buf); 2537 2538 return 0; 2539 } 2540 #endif 2541 #endif 2542 2543 static char * 2544 nigroup(char *name) 2545 { 2546 char *p; 2547 char *q; 2548 MD5_CTX ctxt; 2549 u_int8_t digest[16]; 2550 u_int8_t c; 2551 size_t l; 2552 char hbuf[NI_MAXHOST]; 2553 struct in6_addr in6; 2554 2555 p = strchr(name, '.'); 2556 if (!p) 2557 p = name + strlen(name); 2558 l = p - name; 2559 if (l > 63 || l > sizeof(hbuf) - 1) 2560 return NULL; /*label too long*/ 2561 strncpy(hbuf, name, l); 2562 hbuf[(int)l] = '\0'; 2563 2564 for (q = name; *q; q++) { 2565 if (isupper(*(unsigned char *)q)) 2566 *q = tolower(*(unsigned char *)q); 2567 } 2568 2569 /* generate 8 bytes of pseudo-random value. */ 2570 memset(&ctxt, 0, sizeof(ctxt)); 2571 MD5Init(&ctxt); 2572 c = l & 0xff; 2573 MD5Update(&ctxt, &c, sizeof(c)); 2574 MD5Update(&ctxt, (unsigned char *)name, l); 2575 MD5Final(digest, &ctxt); 2576 2577 if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1) 2578 return NULL; /*XXX*/ 2579 bcopy(digest, &in6.s6_addr[12], 4); 2580 2581 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2582 return NULL; 2583 2584 return strdup(hbuf); 2585 } 2586 2587 static void 2588 usage(void) 2589 { 2590 (void)fprintf(stderr, 2591 "usage: ping6 [-dfH" 2592 #ifdef IPV6_USE_MIN_MTU 2593 "m" 2594 #endif 2595 "nNqtvwW" 2596 #ifdef IPV6_REACHCONF 2597 "R" 2598 #endif 2599 #ifdef IPSEC 2600 #ifdef IPSEC_POLICY_IPSEC 2601 "] [-P policy" 2602 #else 2603 "AE" 2604 #endif 2605 #endif 2606 "] [-a [aAclsg]] [-b sockbufsiz] [-c count] \n" 2607 "\t[-I interface] [-i wait] [-l preload] [-p pattern] " 2608 "[-S sourceaddr]\n" 2609 "\t[-s packetsize] [-h hoplimit] [-g gateway] [hops...] host\n"); 2610 exit(1); 2611 } 2612