1 /* $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 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 1.30 2007/04/19 15:41:00 mtm Exp $ 34 */ 35 36 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */ 37 38 /* 39 * Copyright (c) 1989, 1993 40 * The Regents of the University of California. All rights reserved. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * Mike Muuss. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 */ 69 70 /* 71 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 72 * measure round-trip-delays and packet loss across network paths. 73 * 74 * Author - 75 * Mike Muuss 76 * U. S. Army Ballistic Research Laboratory 77 * December, 1983 78 * 79 * Status - 80 * Public Domain. Distribution Unlimited. 81 * Bugs - 82 * More statistics could always be gathered. 83 * This program has to run SUID to ROOT to access the ICMP socket. 84 */ 85 /* 86 * NOTE: 87 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics 88 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link* 89 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of 90 * network attached to 1 or more interfaces) 91 */ 92 93 #include <sys/param.h> 94 #include <sys/uio.h> 95 #include <sys/socket.h> 96 #include <sys/time.h> 97 98 #include <net/if.h> 99 #include <net/route.h> 100 101 #include <netinet/in.h> 102 #include <netinet/ip6.h> 103 #include <netinet/icmp6.h> 104 #include <arpa/inet.h> 105 #include <arpa/nameser.h> 106 #include <netdb.h> 107 108 #include <ctype.h> 109 #include <err.h> 110 #include <errno.h> 111 #include <fcntl.h> 112 #include <math.h> 113 #include <signal.h> 114 #include <stdio.h> 115 #include <stdlib.h> 116 #include <string.h> 117 #include <unistd.h> 118 #ifdef HAVE_POLL_H 119 #include <poll.h> 120 #endif 121 122 #ifdef IPSEC 123 #include <netinet6/ah.h> 124 #include <netinet6/ipsec.h> 125 #endif 126 127 #include <md5.h> 128 129 struct tv32 { 130 u_int32_t tv32_sec; 131 u_int32_t tv32_usec; 132 }; 133 134 #define MAXPACKETLEN 131072 135 #define IP6LEN 40 136 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 137 #define ICMP6ECHOTMLEN sizeof(struct tv32) 138 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 139 #define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */ 140 /* FQDN case, 64 bits of nonce + 32 bits ttl */ 141 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 142 #define EXTRA 256 /* for AH and various other headers. weird. */ 143 #define DEFDATALEN ICMP6ECHOTMLEN 144 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 145 #define NROUTES 9 /* number of record route slots */ 146 147 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 148 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 149 #define SET(bit) (A(bit) |= B(bit)) 150 #define CLR(bit) (A(bit) &= (~B(bit))) 151 #define TST(bit) (A(bit) & B(bit)) 152 153 #define F_FLOOD 0x0001 154 #define F_INTERVAL 0x0002 155 #define F_PINGFILLED 0x0008 156 #define F_QUIET 0x0010 157 #define F_RROUTE 0x0020 158 #define F_SO_DEBUG 0x0040 159 #define F_VERBOSE 0x0100 160 #ifdef IPSEC 161 #ifdef IPSEC_POLICY_IPSEC 162 #define F_POLICY 0x0400 163 #else 164 #define F_AUTHHDR 0x0200 165 #define F_ENCRYPT 0x0400 166 #endif /*IPSEC_POLICY_IPSEC*/ 167 #endif /*IPSEC*/ 168 #define F_NODEADDR 0x0800 169 #define F_FQDN 0x1000 170 #define F_INTERFACE 0x2000 171 #define F_SRCADDR 0x4000 172 #define F_HOSTNAME 0x10000 173 #define F_FQDNOLD 0x20000 174 #define F_NIGROUP 0x40000 175 #define F_SUPTYPES 0x80000 176 #define F_NOMINMTU 0x100000 177 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 178 u_int options; 179 180 #define IN6LEN sizeof(struct in6_addr) 181 #define SA6LEN sizeof(struct sockaddr_in6) 182 #define DUMMY_PORT 10101 183 184 #define SIN6(s) ((struct sockaddr_in6 *)(s)) 185 186 /* 187 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 188 * number of received sequence numbers we can keep track of. Change 128 189 * to 8192 for complete accuracy... 190 */ 191 #define MAX_DUP_CHK (8 * 8192) 192 int mx_dup_ck = MAX_DUP_CHK; 193 char rcvd_tbl[MAX_DUP_CHK / 8]; 194 195 struct addrinfo *res; 196 struct sockaddr_in6 dst; /* who to ping6 */ 197 struct sockaddr_in6 src; /* src addr of this packet */ 198 socklen_t srclen; 199 int datalen = DEFDATALEN; 200 int s; /* socket file descriptor */ 201 u_char outpack[MAXPACKETLEN]; 202 char BSPACE = '\b'; /* characters written for flood */ 203 char DOT = '.'; 204 char *hostname; 205 int ident; /* process id to identify our packets */ 206 u_int8_t nonce[8]; /* nonce field for node information */ 207 int hoplimit = -1; /* hoplimit */ 208 int pathmtu = 0; /* path MTU for the destination. 0 = unspec. */ 209 210 /* counters */ 211 long npackets; /* max packets to transmit */ 212 long nreceived; /* # of packets we got back */ 213 long nrepeats; /* number of duplicates */ 214 long ntransmitted; /* sequence # for outbound packets = #sent */ 215 struct timeval interval = {1, 0}; /* interval between packets */ 216 217 /* timing */ 218 int timing; /* flag to do timing */ 219 double tmin = 999999999.0; /* minimum round trip time */ 220 double tmax = 0.0; /* maximum round trip time */ 221 double tsum = 0.0; /* sum of all times, for doing average */ 222 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 223 224 /* for node addresses */ 225 u_short naflags; 226 227 /* for ancillary data(advanced API) */ 228 struct msghdr smsghdr; 229 struct iovec smsgiov; 230 char *scmsg = NULL; 231 232 volatile sig_atomic_t seenalrm; 233 volatile sig_atomic_t seenint; 234 #ifdef SIGINFO 235 volatile sig_atomic_t seeninfo; 236 #endif 237 238 void fill(char *, char *); 239 int get_hoplim(struct msghdr *); 240 #ifdef IPV6_RECVPATHMTU 241 int get_pathmtu(struct msghdr *); 242 #else 243 #define get_pathmtu(mhdr) (0) 244 #endif 245 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); 246 void onsignal(int); 247 void retransmit(void); 248 void onint(int); 249 size_t pingerlen(void); 250 int pinger(void); 251 const char *pr_addr(struct sockaddr *, int); 252 void pr_icmph(struct icmp6_hdr *, u_char *); 253 void pr_iph(struct ip6_hdr *); 254 void pr_suptypes(struct icmp6_nodeinfo *, size_t); 255 void pr_nodeaddr(struct icmp6_nodeinfo *, int); 256 int myechoreply(const struct icmp6_hdr *); 257 int mynireply(const struct icmp6_nodeinfo *); 258 char *dnsdecode(const u_char **, const u_char *, const u_char *, 259 char *, size_t); 260 void pr_pack(u_char *, int, struct msghdr *); 261 void pr_exthdrs(struct msghdr *); 262 void pr_ip6opt(void *, size_t); 263 void pr_rthdr(void *, size_t); 264 int pr_bitrange(u_int32_t, int, int); 265 void pr_retip(struct ip6_hdr *, u_char *); 266 void summary(void); 267 void tvsub(struct timeval *, struct timeval *); 268 int setpolicy(int, char *); 269 char *nigroup(char *); 270 void usage(void); 271 272 int 273 main(int argc, char **argv) 274 { 275 struct itimerval itimer; 276 struct sockaddr_in6 from; 277 #ifndef HAVE_ARC4RANDOM 278 struct timeval seed; 279 #endif 280 #ifdef HAVE_POLL_H 281 int timeout; 282 #else 283 struct timeval timeout, *tv; 284 #endif 285 struct addrinfo hints; 286 #ifdef HAVE_POLL_H 287 struct pollfd fdmaskp[1]; 288 #else 289 fd_set *fdmaskp; 290 int fdmasks; 291 #endif 292 int cc, i; 293 int ch, hold, packlen, preload, optval, ret_ga; 294 u_char *datap, *packet; 295 char *e, *target, *ifname = NULL, *gateway = NULL; 296 int ip6optlen = 0; 297 struct cmsghdr *scmsgp = NULL; 298 struct cmsghdr *cm; 299 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 300 u_long lsockbufsize; 301 int sockbufsize = 0; 302 #endif 303 int usepktinfo = 0; 304 struct in6_pktinfo *pktinfo = NULL; 305 #ifdef USE_RFC3542 306 struct ip6_rthdr *rthdr = NULL; 307 #endif 308 #ifdef IPSEC_POLICY_IPSEC 309 char *policy_in = NULL; 310 char *policy_out = NULL; 311 #endif 312 #ifdef IPV6_USE_MIN_MTU 313 int mflag = 0; 314 #endif 315 double intval; 316 317 /* just to be sure */ 318 memset(&smsghdr, 0, sizeof(smsghdr)); 319 memset(&smsgiov, 0, sizeof(smsgiov)); 320 321 preload = 0; 322 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 323 #ifndef IPSEC 324 #define ADDOPTS 325 #else 326 #ifdef IPSEC_POLICY_IPSEC 327 #define ADDOPTS "P:" 328 #else 329 #define ADDOPTS "AE" 330 #endif /*IPSEC_POLICY_IPSEC*/ 331 #endif 332 while ((ch = getopt(argc, argv, 333 "a:b:c:dfHg:h:I:i:l:mnNp:qS:s:tvwW" ADDOPTS)) != -1) { 334 #undef ADDOPTS 335 switch (ch) { 336 case 'a': 337 { 338 char *cp; 339 340 options &= ~F_NOUSERDATA; 341 options |= F_NODEADDR; 342 for (cp = optarg; *cp != '\0'; cp++) { 343 switch (*cp) { 344 case 'a': 345 naflags |= NI_NODEADDR_FLAG_ALL; 346 break; 347 case 'c': 348 case 'C': 349 naflags |= NI_NODEADDR_FLAG_COMPAT; 350 break; 351 case 'l': 352 case 'L': 353 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 354 break; 355 case 's': 356 case 'S': 357 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 358 break; 359 case 'g': 360 case 'G': 361 naflags |= NI_NODEADDR_FLAG_GLOBAL; 362 break; 363 case 'A': /* experimental. not in the spec */ 364 #ifdef NI_NODEADDR_FLAG_ANYCAST 365 naflags |= NI_NODEADDR_FLAG_ANYCAST; 366 break; 367 #else 368 errx(1, 369 "-a A is not supported on the platform"); 370 /*NOTREACHED*/ 371 #endif 372 default: 373 usage(); 374 /*NOTREACHED*/ 375 } 376 } 377 break; 378 } 379 case 'b': 380 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 381 errno = 0; 382 e = NULL; 383 lsockbufsize = strtoul(optarg, &e, 10); 384 sockbufsize = lsockbufsize; 385 if (errno || !*optarg || *e || 386 sockbufsize != (long)lsockbufsize) 387 errx(1, "invalid socket buffer size"); 388 #else 389 errx(1, 390 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 391 #endif 392 break; 393 case 'c': 394 npackets = strtol(optarg, &e, 10); 395 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 396 errx(1, 397 "illegal number of packets -- %s", optarg); 398 break; 399 case 'd': 400 options |= F_SO_DEBUG; 401 break; 402 case 'f': 403 if (getuid()) { 404 errno = EPERM; 405 errx(1, "Must be superuser to flood ping"); 406 } 407 options |= F_FLOOD; 408 setbuf(stdout, NULL); 409 break; 410 case 'g': 411 gateway = optarg; 412 break; 413 case 'H': 414 options |= F_HOSTNAME; 415 break; 416 case 'h': /* hoplimit */ 417 hoplimit = strtol(optarg, &e, 10); 418 if (*optarg == '\0' || *e != '\0') 419 errx(1, "illegal hoplimit %s", optarg); 420 if (255 < hoplimit || hoplimit < -1) 421 errx(1, 422 "illegal hoplimit -- %s", optarg); 423 break; 424 case 'I': 425 ifname = optarg; 426 options |= F_INTERFACE; 427 #ifndef USE_SIN6_SCOPE_ID 428 usepktinfo++; 429 #endif 430 break; 431 case 'i': /* wait between sending packets */ 432 intval = strtod(optarg, &e); 433 if (*optarg == '\0' || *e != '\0') 434 errx(1, "illegal timing interval %s", optarg); 435 if (intval < 1 && getuid()) { 436 errx(1, "%s: only root may use interval < 1s", 437 strerror(EPERM)); 438 } 439 interval.tv_sec = (long)intval; 440 interval.tv_usec = 441 (long)((intval - interval.tv_sec) * 1000000); 442 if (interval.tv_sec < 0) 443 errx(1, "illegal timing interval %s", optarg); 444 /* less than 1/hz does not make sense */ 445 if (interval.tv_sec == 0 && interval.tv_usec < 10000) { 446 warnx("too small interval, raised to 0.01"); 447 interval.tv_usec = 10000; 448 } 449 options |= F_INTERVAL; 450 break; 451 case 'l': 452 if (getuid()) { 453 errno = EPERM; 454 errx(1, "Must be superuser to preload"); 455 } 456 preload = strtol(optarg, &e, 10); 457 if (preload < 0 || *optarg == '\0' || *e != '\0') 458 errx(1, "illegal preload value -- %s", optarg); 459 break; 460 case 'm': 461 #ifdef IPV6_USE_MIN_MTU 462 mflag++; 463 break; 464 #else 465 errx(1, "-%c is not supported on this platform", ch); 466 /*NOTREACHED*/ 467 #endif 468 case 'n': 469 options &= ~F_HOSTNAME; 470 break; 471 case 'N': 472 options |= F_NIGROUP; 473 break; 474 case 'p': /* fill buffer with user pattern */ 475 options |= F_PINGFILLED; 476 fill((char *)datap, optarg); 477 break; 478 case 'q': 479 options |= F_QUIET; 480 break; 481 case 'S': 482 memset(&hints, 0, sizeof(struct addrinfo)); 483 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ 484 hints.ai_family = AF_INET6; 485 hints.ai_socktype = SOCK_RAW; 486 hints.ai_protocol = IPPROTO_ICMPV6; 487 488 ret_ga = getaddrinfo(optarg, NULL, &hints, &res); 489 if (ret_ga) { 490 errx(1, "invalid source address: %s", 491 gai_strerror(ret_ga)); 492 } 493 /* 494 * res->ai_family must be AF_INET6 and res->ai_addrlen 495 * must be sizeof(src). 496 */ 497 memcpy(&src, res->ai_addr, res->ai_addrlen); 498 srclen = res->ai_addrlen; 499 freeaddrinfo(res); 500 options |= F_SRCADDR; 501 break; 502 case 's': /* size of packet to send */ 503 datalen = strtol(optarg, &e, 10); 504 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 505 errx(1, "illegal datalen value -- %s", optarg); 506 if (datalen > MAXDATALEN) { 507 errx(1, 508 "datalen value too large, maximum is %d", 509 MAXDATALEN); 510 } 511 break; 512 case 't': 513 options &= ~F_NOUSERDATA; 514 options |= F_SUPTYPES; 515 break; 516 case 'v': 517 options |= F_VERBOSE; 518 break; 519 case 'w': 520 options &= ~F_NOUSERDATA; 521 options |= F_FQDN; 522 break; 523 case 'W': 524 options &= ~F_NOUSERDATA; 525 options |= F_FQDNOLD; 526 break; 527 #ifdef IPSEC 528 #ifdef IPSEC_POLICY_IPSEC 529 case 'P': 530 options |= F_POLICY; 531 if (!strncmp("in", optarg, 2)) { 532 if ((policy_in = strdup(optarg)) == NULL) 533 errx(1, "strdup"); 534 } else if (!strncmp("out", optarg, 3)) { 535 if ((policy_out = strdup(optarg)) == NULL) 536 errx(1, "strdup"); 537 } else 538 errx(1, "invalid security policy"); 539 break; 540 #else 541 case 'A': 542 options |= F_AUTHHDR; 543 break; 544 case 'E': 545 options |= F_ENCRYPT; 546 break; 547 #endif /*IPSEC_POLICY_IPSEC*/ 548 #endif /*IPSEC*/ 549 default: 550 usage(); 551 /*NOTREACHED*/ 552 } 553 } 554 555 argc -= optind; 556 argv += optind; 557 558 if (argc < 1) { 559 usage(); 560 /*NOTREACHED*/ 561 } 562 if (argc > 1) { 563 errx(1, "too many arguments"); 564 /*NOTREACHED*/ 565 } 566 567 if (options & F_NIGROUP) { 568 target = nigroup(argv[argc - 1]); 569 if (target == NULL) { 570 usage(); 571 /*NOTREACHED*/ 572 } 573 } else 574 target = argv[argc - 1]; 575 576 /* getaddrinfo */ 577 memset(&hints, 0, sizeof(struct addrinfo)); 578 hints.ai_flags = AI_CANONNAME; 579 hints.ai_family = AF_INET6; 580 hints.ai_socktype = SOCK_RAW; 581 hints.ai_protocol = IPPROTO_ICMPV6; 582 583 ret_ga = getaddrinfo(target, NULL, &hints, &res); 584 if (ret_ga) 585 errx(1, "%s", gai_strerror(ret_ga)); 586 if (res->ai_canonname) 587 hostname = res->ai_canonname; 588 else 589 hostname = target; 590 591 if (!res->ai_addr) 592 errx(1, "getaddrinfo failed"); 593 594 memcpy(&dst, res->ai_addr, res->ai_addrlen); 595 596 if ((s = socket(res->ai_family, res->ai_socktype, 597 res->ai_protocol)) < 0) 598 err(1, "socket"); 599 600 /* set the source address if specified. */ 601 if ((options & F_SRCADDR) && 602 bind(s, (struct sockaddr *)&src, srclen) != 0) { 603 err(1, "bind"); 604 } 605 606 /* set the gateway (next hop) if specified */ 607 if (gateway) { 608 struct addrinfo ghints, *gres; 609 int error; 610 611 memset(&ghints, 0, sizeof(ghints)); 612 ghints.ai_family = AF_INET6; 613 ghints.ai_socktype = SOCK_RAW; 614 ghints.ai_protocol = IPPROTO_ICMPV6; 615 616 error = getaddrinfo(gateway, NULL, &hints, &gres); 617 if (error) { 618 errx(1, "getaddrinfo for the gateway %s: %s", 619 gateway, gai_strerror(error)); 620 } 621 if (gres->ai_next && (options & F_VERBOSE)) 622 warnx("gateway resolves to multiple addresses"); 623 624 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP, 625 gres->ai_addr, gres->ai_addrlen)) { 626 err(1, "setsockopt(IPV6_NEXTHOP)"); 627 } 628 629 freeaddrinfo(gres); 630 } 631 632 /* 633 * let the kerel pass extension headers of incoming packets, 634 * for privileged socket options 635 */ 636 if ((options & F_VERBOSE) != 0) { 637 int opton = 1; 638 639 #ifdef IPV6_RECVHOPOPTS 640 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 641 sizeof(opton))) 642 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 643 #else /* old adv. API */ 644 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 645 sizeof(opton))) 646 err(1, "setsockopt(IPV6_HOPOPTS)"); 647 #endif 648 #ifdef IPV6_RECVDSTOPTS 649 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 650 sizeof(opton))) 651 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 652 #else /* old adv. API */ 653 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 654 sizeof(opton))) 655 err(1, "setsockopt(IPV6_DSTOPTS)"); 656 #endif 657 #ifdef IPV6_RECVRTHDRDSTOPTS 658 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 659 sizeof(opton))) 660 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 661 #endif 662 } 663 664 /* revoke root privilege */ 665 seteuid(getuid()); 666 setuid(getuid()); 667 668 if ((options & F_FLOOD) && (options & F_INTERVAL)) 669 errx(1, "-f and -i incompatible options"); 670 671 if ((options & F_NOUSERDATA) == 0) { 672 if (datalen >= (int)sizeof(struct tv32)) { 673 /* we can time transfer */ 674 timing = 1; 675 } else 676 timing = 0; 677 /* in F_VERBOSE case, we may get non-echoreply packets*/ 678 if (options & F_VERBOSE) 679 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 680 else 681 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 682 } else { 683 /* suppress timing for node information query */ 684 timing = 0; 685 datalen = 2048; 686 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 687 } 688 689 if (!(packet = (u_char *)malloc((u_int)packlen))) 690 err(1, "Unable to allocate packet"); 691 if (!(options & F_PINGFILLED)) 692 for (i = ICMP6ECHOLEN; i < packlen; ++i) 693 *datap++ = i; 694 695 ident = getpid() & 0xFFFF; 696 #ifndef HAVE_ARC4RANDOM 697 gettimeofday(&seed, NULL); 698 srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident)); 699 memset(nonce, 0, sizeof(nonce)); 700 for (i = 0; i < (int)sizeof(nonce); i += sizeof(int)) 701 *((int *)&nonce[i]) = rand(); 702 #else 703 memset(nonce, 0, sizeof(nonce)); 704 for (i = 0; i < (int)sizeof(nonce); i += sizeof(u_int32_t)) 705 *((u_int32_t *)&nonce[i]) = arc4random(); 706 #endif 707 708 hold = 1; 709 710 if (options & F_SO_DEBUG) 711 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 712 sizeof(hold)); 713 optval = IPV6_DEFHLIM; 714 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 715 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 716 &optval, sizeof(optval)) == -1) 717 err(1, "IPV6_MULTICAST_HOPS"); 718 #ifdef IPV6_USE_MIN_MTU 719 if (mflag != 1) { 720 optval = mflag > 1 ? 0 : 1; 721 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 722 &optval, sizeof(optval)) == -1) 723 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 724 } 725 #ifdef IPV6_RECVPATHMTU 726 else { 727 optval = 1; 728 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, 729 &optval, sizeof(optval)) == -1) 730 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 731 } 732 #endif /* IPV6_RECVPATHMTU */ 733 #endif /* IPV6_USE_MIN_MTU */ 734 735 #ifdef IPSEC 736 #ifdef IPSEC_POLICY_IPSEC 737 if (options & F_POLICY) { 738 if (setpolicy(s, policy_in) < 0) 739 errx(1, "%s", ipsec_strerror()); 740 if (setpolicy(s, policy_out) < 0) 741 errx(1, "%s", ipsec_strerror()); 742 } 743 #else 744 if (options & F_AUTHHDR) { 745 optval = IPSEC_LEVEL_REQUIRE; 746 #ifdef IPV6_AUTH_TRANS_LEVEL 747 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 748 &optval, sizeof(optval)) == -1) 749 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 750 #else /* old def */ 751 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 752 &optval, sizeof(optval)) == -1) 753 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 754 #endif 755 } 756 if (options & F_ENCRYPT) { 757 optval = IPSEC_LEVEL_REQUIRE; 758 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 759 &optval, sizeof(optval)) == -1) 760 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 761 } 762 #endif /*IPSEC_POLICY_IPSEC*/ 763 #endif 764 765 #ifdef ICMP6_FILTER 766 { 767 struct icmp6_filter filt; 768 if (!(options & F_VERBOSE)) { 769 ICMP6_FILTER_SETBLOCKALL(&filt); 770 if ((options & F_FQDN) || (options & F_FQDNOLD) || 771 (options & F_NODEADDR) || (options & F_SUPTYPES)) 772 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 773 else 774 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 775 } else { 776 ICMP6_FILTER_SETPASSALL(&filt); 777 } 778 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 779 sizeof(filt)) < 0) 780 err(1, "setsockopt(ICMP6_FILTER)"); 781 } 782 #endif /*ICMP6_FILTER*/ 783 784 /* let the kerel pass extension headers of incoming packets */ 785 if ((options & F_VERBOSE) != 0) { 786 int opton = 1; 787 788 #ifdef IPV6_RECVRTHDR 789 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 790 sizeof(opton))) 791 err(1, "setsockopt(IPV6_RECVRTHDR)"); 792 #else /* old adv. API */ 793 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton, 794 sizeof(opton))) 795 err(1, "setsockopt(IPV6_RTHDR)"); 796 #endif 797 } 798 799 /* 800 optval = 1; 801 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 802 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 803 &optval, sizeof(optval)) == -1) 804 err(1, "IPV6_MULTICAST_LOOP"); 805 */ 806 807 /* Specify the outgoing interface and/or the source address */ 808 if (usepktinfo) 809 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 810 811 if (hoplimit != -1) 812 ip6optlen += CMSG_SPACE(sizeof(int)); 813 814 /* set IP6 packet options */ 815 if (ip6optlen) { 816 if ((scmsg = (char *)malloc(ip6optlen)) == NULL) 817 errx(1, "can't allocate enough memory"); 818 smsghdr.msg_control = (caddr_t)scmsg; 819 smsghdr.msg_controllen = ip6optlen; 820 scmsgp = (struct cmsghdr *)scmsg; 821 } 822 if (usepktinfo) { 823 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); 824 memset(pktinfo, 0, sizeof(*pktinfo)); 825 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 826 scmsgp->cmsg_level = IPPROTO_IPV6; 827 scmsgp->cmsg_type = IPV6_PKTINFO; 828 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 829 } 830 831 /* set the outgoing interface */ 832 if (ifname) { 833 #ifndef USE_SIN6_SCOPE_ID 834 /* pktinfo must have already been allocated */ 835 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0) 836 errx(1, "%s: invalid interface name", ifname); 837 #else 838 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 839 errx(1, "%s: invalid interface name", ifname); 840 #endif 841 } 842 if (hoplimit != -1) { 843 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 844 scmsgp->cmsg_level = IPPROTO_IPV6; 845 scmsgp->cmsg_type = IPV6_HOPLIMIT; 846 *(int *)(CMSG_DATA(scmsgp)) = hoplimit; 847 848 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 849 } 850 851 if (!(options & F_SRCADDR)) { 852 /* 853 * get the source address. XXX since we revoked the root 854 * privilege, we cannot use a raw socket for this. 855 */ 856 int dummy; 857 socklen_t len = sizeof(src); 858 859 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 860 err(1, "UDP socket"); 861 862 src.sin6_family = AF_INET6; 863 src.sin6_addr = dst.sin6_addr; 864 src.sin6_port = ntohs(DUMMY_PORT); 865 src.sin6_scope_id = dst.sin6_scope_id; 866 867 #ifdef USE_RFC3542 868 if (pktinfo && 869 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 870 (void *)pktinfo, sizeof(*pktinfo))) 871 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 872 if (hoplimit != -1 && 873 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 874 (void *)&hoplimit, sizeof(hoplimit))) 875 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); 876 if (hoplimit != -1 && 877 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 878 (void *)&hoplimit, sizeof(hoplimit))) 879 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); 880 if (rthdr && 881 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 882 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 883 err(1, "UDP setsockopt(IPV6_RTHDR)"); 884 #else /* old advanced API */ 885 if (smsghdr.msg_control && 886 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS, 887 (void *)smsghdr.msg_control, smsghdr.msg_controllen)) 888 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)"); 889 #endif 890 891 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 892 err(1, "UDP connect"); 893 894 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 895 err(1, "getsockname"); 896 897 close(dummy); 898 } 899 900 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 901 if (sockbufsize) { 902 if (datalen > sockbufsize) 903 warnx("you need -b to increase socket buffer size"); 904 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 905 sizeof(sockbufsize)) < 0) 906 err(1, "setsockopt(SO_SNDBUF)"); 907 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 908 sizeof(sockbufsize)) < 0) 909 err(1, "setsockopt(SO_RCVBUF)"); 910 } 911 else { 912 if (datalen > 8 * 1024) /*XXX*/ 913 warnx("you need -b to increase socket buffer size"); 914 /* 915 * When pinging the broadcast address, you can get a lot of 916 * answers. Doing something so evil is useful if you are trying 917 * to stress the ethernet, or just want to fill the arp cache 918 * to get some stuff for /etc/ethers. 919 */ 920 hold = 48 * 1024; 921 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 922 sizeof(hold)); 923 } 924 #endif 925 926 optval = 1; 927 #ifndef USE_SIN6_SCOPE_ID 928 #ifdef IPV6_RECVPKTINFO 929 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 930 sizeof(optval)) < 0) 931 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 932 #else /* old adv. API */ 933 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 934 sizeof(optval)) < 0) 935 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 936 #endif 937 #endif /* USE_SIN6_SCOPE_ID */ 938 #ifdef IPV6_RECVHOPLIMIT 939 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 940 sizeof(optval)) < 0) 941 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 942 #else /* old adv. API */ 943 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 944 sizeof(optval)) < 0) 945 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 946 #endif 947 948 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 949 (unsigned long)(pingerlen() - 8)); 950 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 951 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 952 953 while (preload--) /* Fire off them quickies. */ 954 pinger(); 955 956 signal(SIGINT, onsignal); 957 #ifdef SIGINFO 958 signal(SIGINFO, onsignal); 959 #endif 960 961 if ((options & F_FLOOD) == 0) { 962 signal(SIGALRM, onsignal); 963 itimer.it_interval = interval; 964 itimer.it_value = interval; 965 setitimer(ITIMER_REAL, &itimer, NULL); 966 if (ntransmitted == 0) 967 retransmit(); 968 } 969 970 #ifndef HAVE_POLL_H 971 fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask); 972 if ((fdmaskp = malloc(fdmasks)) == NULL) 973 err(1, "malloc"); 974 #endif 975 976 seenalrm = seenint = 0; 977 #ifdef SIGINFO 978 seeninfo = 0; 979 #endif 980 981 /* For control (ancillary) data received from recvmsg() */ 982 cm = (struct cmsghdr *)malloc(CONTROLLEN); 983 if (cm == NULL) 984 err(1, "malloc"); 985 986 for (;;) { 987 struct msghdr m; 988 struct iovec iov[2]; 989 990 /* signal handling */ 991 if (seenalrm) { 992 retransmit(); 993 seenalrm = 0; 994 continue; 995 } 996 if (seenint) { 997 onint(SIGINT); 998 seenint = 0; 999 continue; 1000 } 1001 #ifdef SIGINFO 1002 if (seeninfo) { 1003 summary(); 1004 seeninfo = 0; 1005 continue; 1006 } 1007 #endif 1008 1009 if (options & F_FLOOD) { 1010 pinger(); 1011 #ifdef HAVE_POLL_H 1012 timeout = 10; 1013 #else 1014 timeout.tv_sec = 0; 1015 timeout.tv_usec = 10000; 1016 tv = &timeout; 1017 #endif 1018 } else { 1019 #ifdef HAVE_POLL_H 1020 timeout = INFTIM; 1021 #else 1022 tv = NULL; 1023 #endif 1024 } 1025 #ifdef HAVE_POLL_H 1026 fdmaskp[0].fd = s; 1027 fdmaskp[0].events = POLLIN; 1028 cc = poll(fdmaskp, 1, timeout); 1029 #else 1030 memset(fdmaskp, 0, fdmasks); 1031 FD_SET(s, fdmaskp); 1032 cc = select(s + 1, fdmaskp, NULL, NULL, tv); 1033 #endif 1034 if (cc < 0) { 1035 if (errno != EINTR) { 1036 #ifdef HAVE_POLL_H 1037 warn("poll"); 1038 #else 1039 warn("select"); 1040 #endif 1041 sleep(1); 1042 } 1043 continue; 1044 } else if (cc == 0) 1045 continue; 1046 1047 m.msg_name = (caddr_t)&from; 1048 m.msg_namelen = sizeof(from); 1049 memset(&iov, 0, sizeof(iov)); 1050 iov[0].iov_base = (caddr_t)packet; 1051 iov[0].iov_len = packlen; 1052 m.msg_iov = iov; 1053 m.msg_iovlen = 1; 1054 memset(cm, 0, CONTROLLEN); 1055 m.msg_control = (void *)cm; 1056 m.msg_controllen = CONTROLLEN; 1057 1058 cc = recvmsg(s, &m, 0); 1059 if (cc < 0) { 1060 if (errno != EINTR) { 1061 warn("recvmsg"); 1062 sleep(1); 1063 } 1064 continue; 1065 } else if (cc == 0) { 1066 int mtu; 1067 1068 /* 1069 * receive control messages only. Process the 1070 * exceptions (currently the only possiblity is 1071 * a path MTU notification.) 1072 */ 1073 if ((mtu = get_pathmtu(&m)) > 0) { 1074 if ((options & F_VERBOSE) != 0) { 1075 printf("new path MTU (%d) is " 1076 "notified\n", mtu); 1077 } 1078 } 1079 continue; 1080 } else { 1081 /* 1082 * an ICMPv6 message (probably an echoreply) arrived. 1083 */ 1084 pr_pack(packet, cc, &m); 1085 } 1086 if (npackets && nreceived >= npackets) 1087 break; 1088 } 1089 summary(); 1090 exit(nreceived == 0); 1091 } 1092 1093 void 1094 onsignal(int sig) 1095 { 1096 switch (sig) { 1097 case SIGALRM: 1098 seenalrm++; 1099 break; 1100 case SIGINT: 1101 seenint++; 1102 break; 1103 #ifdef SIGINFO 1104 case SIGINFO: 1105 seeninfo++; 1106 break; 1107 #endif 1108 } 1109 } 1110 1111 /* 1112 * retransmit -- 1113 * This routine transmits another ping6. 1114 */ 1115 void 1116 retransmit(void) 1117 { 1118 struct itimerval itimer; 1119 1120 if (pinger() == 0) 1121 return; 1122 1123 /* 1124 * If we're not transmitting any more packets, change the timer 1125 * to wait two round-trip times if we've received any packets or 1126 * ten seconds if we haven't. 1127 */ 1128 #define MAXWAIT 10 1129 if (nreceived) { 1130 itimer.it_value.tv_sec = 2 * tmax / 1000; 1131 if (itimer.it_value.tv_sec == 0) 1132 itimer.it_value.tv_sec = 1; 1133 } else 1134 itimer.it_value.tv_sec = MAXWAIT; 1135 itimer.it_interval.tv_sec = 0; 1136 itimer.it_interval.tv_usec = 0; 1137 itimer.it_value.tv_usec = 0; 1138 1139 signal(SIGALRM, onint); 1140 setitimer(ITIMER_REAL, &itimer, NULL); 1141 } 1142 1143 /* 1144 * pinger -- 1145 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1146 * will be added on by the kernel. The ID field is our UNIX process ID, 1147 * and the sequence number is an ascending integer. The first 8 bytes 1148 * of the data portion are used to hold a UNIX "timeval" struct in VAX 1149 * byte-order, to compute the round-trip time. 1150 */ 1151 size_t 1152 pingerlen(void) 1153 { 1154 size_t l; 1155 1156 if (options & F_FQDN) 1157 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1158 else if (options & F_FQDNOLD) 1159 l = ICMP6_NIQLEN; 1160 else if (options & F_NODEADDR) 1161 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1162 else if (options & F_SUPTYPES) 1163 l = ICMP6_NIQLEN; 1164 else 1165 l = ICMP6ECHOLEN + datalen; 1166 1167 return l; 1168 } 1169 1170 int 1171 pinger(void) 1172 { 1173 struct icmp6_hdr *icp; 1174 struct iovec iov[2]; 1175 int i, cc; 1176 struct icmp6_nodeinfo *nip; 1177 int seq; 1178 1179 if (npackets && ntransmitted >= npackets) 1180 return(-1); /* no more transmission */ 1181 1182 icp = (struct icmp6_hdr *)outpack; 1183 nip = (struct icmp6_nodeinfo *)outpack; 1184 memset(icp, 0, sizeof(*icp)); 1185 icp->icmp6_cksum = 0; 1186 seq = ntransmitted++; 1187 CLR(seq % mx_dup_ck); 1188 1189 if (options & F_FQDN) { 1190 icp->icmp6_type = ICMP6_NI_QUERY; 1191 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1192 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1193 nip->ni_flags = htons(0); 1194 1195 memcpy(nip->icmp6_ni_nonce, nonce, 1196 sizeof(nip->icmp6_ni_nonce)); 1197 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1198 1199 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1200 sizeof(dst.sin6_addr)); 1201 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1202 datalen = 0; 1203 } else if (options & F_FQDNOLD) { 1204 /* packet format in 03 draft - no Subject data on queries */ 1205 icp->icmp6_type = ICMP6_NI_QUERY; 1206 icp->icmp6_code = 0; /* code field is always 0 */ 1207 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1208 nip->ni_flags = htons(0); 1209 1210 memcpy(nip->icmp6_ni_nonce, nonce, 1211 sizeof(nip->icmp6_ni_nonce)); 1212 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1213 1214 cc = ICMP6_NIQLEN; 1215 datalen = 0; 1216 } else if (options & F_NODEADDR) { 1217 icp->icmp6_type = ICMP6_NI_QUERY; 1218 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1219 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1220 nip->ni_flags = naflags; 1221 1222 memcpy(nip->icmp6_ni_nonce, nonce, 1223 sizeof(nip->icmp6_ni_nonce)); 1224 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1225 1226 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1227 sizeof(dst.sin6_addr)); 1228 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1229 datalen = 0; 1230 } else if (options & F_SUPTYPES) { 1231 icp->icmp6_type = ICMP6_NI_QUERY; 1232 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1233 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1234 /* we support compressed bitmap */ 1235 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1236 1237 memcpy(nip->icmp6_ni_nonce, nonce, 1238 sizeof(nip->icmp6_ni_nonce)); 1239 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1240 cc = ICMP6_NIQLEN; 1241 datalen = 0; 1242 } else { 1243 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1244 icp->icmp6_code = 0; 1245 icp->icmp6_id = htons(ident); 1246 icp->icmp6_seq = ntohs(seq); 1247 if (timing) { 1248 struct timeval tv; 1249 struct tv32 *tv32; 1250 gettimeofday(&tv, NULL); 1251 tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN]; 1252 tv32->tv32_sec = htonl(tv.tv_sec); 1253 tv32->tv32_usec = htonl(tv.tv_usec); 1254 } 1255 cc = ICMP6ECHOLEN + datalen; 1256 } 1257 1258 #ifdef DIAGNOSTIC 1259 if (pingerlen() != cc) 1260 errx(1, "internal error; length mismatch"); 1261 #endif 1262 1263 smsghdr.msg_name = (caddr_t)&dst; 1264 smsghdr.msg_namelen = sizeof(dst); 1265 memset(&iov, 0, sizeof(iov)); 1266 iov[0].iov_base = (caddr_t)outpack; 1267 iov[0].iov_len = cc; 1268 smsghdr.msg_iov = iov; 1269 smsghdr.msg_iovlen = 1; 1270 1271 i = sendmsg(s, &smsghdr, 0); 1272 1273 if (i < 0 || i != cc) { 1274 if (i < 0) 1275 warn("sendmsg"); 1276 printf("ping6: wrote %s %d chars, ret=%d\n", hostname, cc, i); 1277 } 1278 if (!(options & F_QUIET) && options & F_FLOOD) 1279 write(STDOUT_FILENO, &DOT, 1); 1280 1281 return(0); 1282 } 1283 1284 int 1285 myechoreply(const struct icmp6_hdr *icp) 1286 { 1287 if (ntohs(icp->icmp6_id) == ident) 1288 return 1; 1289 else 1290 return 0; 1291 } 1292 1293 int 1294 mynireply(const struct icmp6_nodeinfo *nip) 1295 { 1296 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1297 nonce + sizeof(u_int16_t), 1298 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1299 return 1; 1300 else 1301 return 0; 1302 } 1303 1304 char * 1305 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf, 1306 size_t bufsiz) 1307 { 1308 int i = 0; 1309 const u_char *cp; 1310 char cresult[MAXDNAME + 1]; 1311 const u_char *comp; 1312 int l; 1313 1314 cp = *sp; 1315 *buf = '\0'; 1316 1317 if (cp >= ep) 1318 return NULL; 1319 while (cp < ep) { 1320 i = *cp; 1321 if (i == 0 || cp != *sp) { 1322 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz) 1323 return NULL; /*result overrun*/ 1324 } 1325 if (i == 0) 1326 break; 1327 cp++; 1328 1329 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1330 /* DNS compression */ 1331 if (!base) 1332 return NULL; 1333 1334 comp = base + (i & 0x3f); 1335 if (dnsdecode(&comp, cp, base, cresult, 1336 sizeof(cresult)) == NULL) 1337 return NULL; 1338 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1339 return NULL; /*result overrun*/ 1340 break; 1341 } else if ((i & 0x3f) == i) { 1342 if (i > ep - cp) 1343 return NULL; /*source overrun*/ 1344 while (i-- > 0 && cp < ep) { 1345 l = snprintf(cresult, sizeof(cresult), 1346 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1347 if (l >= (int)sizeof(cresult) || l < 0) 1348 return NULL; 1349 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1350 return NULL; /*result overrun*/ 1351 cp++; 1352 } 1353 } else 1354 return NULL; /*invalid label*/ 1355 } 1356 if (i != 0) 1357 return NULL; /*not terminated*/ 1358 cp++; 1359 *sp = cp; 1360 return buf; 1361 } 1362 1363 /* 1364 * pr_pack -- 1365 * Print out the packet, if it came from us. This logic is necessary 1366 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1367 * which arrive ('tis only fair). This permits multiple copies of this 1368 * program to be run without having intermingled output (or statistics!). 1369 */ 1370 void 1371 pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1372 { 1373 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1374 struct icmp6_hdr *icp; 1375 struct icmp6_nodeinfo *ni; 1376 int i; 1377 int hoplim; 1378 struct sockaddr *from; 1379 int fromlen; 1380 u_char *cp = NULL, *dp, *end = buf + cc; 1381 struct in6_pktinfo *pktinfo = NULL; 1382 struct timeval tv, tp; 1383 struct tv32 *tpp; 1384 double triptime = 0; 1385 int dupflag; 1386 size_t off; 1387 int oldfqdn; 1388 u_int16_t seq; 1389 char dnsname[MAXDNAME + 1]; 1390 1391 gettimeofday(&tv, NULL); 1392 1393 if (!mhdr || !mhdr->msg_name || 1394 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1395 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1396 if (options & F_VERBOSE) 1397 warnx("invalid peername"); 1398 return; 1399 } 1400 from = (struct sockaddr *)mhdr->msg_name; 1401 fromlen = mhdr->msg_namelen; 1402 if (cc < (int)sizeof(struct icmp6_hdr)) { 1403 if (options & F_VERBOSE) 1404 warnx("packet too short (%d bytes) from %s", cc, 1405 pr_addr(from, fromlen)); 1406 return; 1407 } 1408 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) && 1409 (options & F_VERBOSE) != 0) 1410 warnx("some control data discarded, insufficient buffer size"); 1411 icp = (struct icmp6_hdr *)buf; 1412 ni = (struct icmp6_nodeinfo *)buf; 1413 off = 0; 1414 1415 if ((hoplim = get_hoplim(mhdr)) == -1) { 1416 warnx("failed to get receiving hop limit"); 1417 return; 1418 } 1419 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1420 warnx("failed to get receiving packet information"); 1421 return; 1422 } 1423 1424 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1425 seq = ntohs(icp->icmp6_seq); 1426 ++nreceived; 1427 if (timing) { 1428 tpp = (struct tv32 *)(icp + 1); 1429 tp.tv_sec = ntohl(tpp->tv32_sec); 1430 tp.tv_usec = ntohl(tpp->tv32_usec); 1431 tvsub(&tv, &tp); 1432 triptime = ((double)tv.tv_sec) * 1000.0 + 1433 ((double)tv.tv_usec) / 1000.0; 1434 tsum += triptime; 1435 tsumsq += triptime * triptime; 1436 if (triptime < tmin) 1437 tmin = triptime; 1438 if (triptime > tmax) 1439 tmax = triptime; 1440 } 1441 1442 if (TST(seq % mx_dup_ck)) { 1443 ++nrepeats; 1444 --nreceived; 1445 dupflag = 1; 1446 } else { 1447 SET(seq % mx_dup_ck); 1448 dupflag = 0; 1449 } 1450 1451 if (options & F_QUIET) 1452 return; 1453 1454 if (options & F_FLOOD) 1455 write(STDOUT_FILENO, &BSPACE, 1); 1456 else { 1457 printf("%d bytes from %s, icmp_seq=%u", cc, 1458 pr_addr(from, fromlen), seq); 1459 printf(" hlim=%d", hoplim); 1460 if ((options & F_VERBOSE) != 0) { 1461 struct sockaddr_in6 dstsa; 1462 1463 memset(&dstsa, 0, sizeof(dstsa)); 1464 dstsa.sin6_family = AF_INET6; 1465 dstsa.sin6_len = sizeof(dstsa); 1466 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1467 dstsa.sin6_addr = pktinfo->ipi6_addr; 1468 printf(" dst=%s", 1469 pr_addr((struct sockaddr *)&dstsa, 1470 sizeof(dstsa))); 1471 } 1472 if (timing) 1473 printf(" time=%.3f ms", triptime); 1474 if (dupflag) 1475 printf("(DUP!)"); 1476 /* check the data */ 1477 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1478 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1479 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1480 if (*cp != *dp) { 1481 printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1482 break; 1483 } 1484 } 1485 } 1486 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1487 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce); 1488 ++nreceived; 1489 if (TST(seq % mx_dup_ck)) { 1490 ++nrepeats; 1491 --nreceived; 1492 dupflag = 1; 1493 } else { 1494 SET(seq % mx_dup_ck); 1495 dupflag = 0; 1496 } 1497 1498 if (options & F_QUIET) 1499 return; 1500 1501 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1502 1503 switch (ntohs(ni->ni_code)) { 1504 case ICMP6_NI_SUCCESS: 1505 break; 1506 case ICMP6_NI_REFUSED: 1507 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1508 goto fqdnend; 1509 case ICMP6_NI_UNKNOWN: 1510 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1511 goto fqdnend; 1512 default: 1513 printf("unknown code 0x%x, type 0x%x", 1514 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1515 goto fqdnend; 1516 } 1517 1518 switch (ntohs(ni->ni_qtype)) { 1519 case NI_QTYPE_NOOP: 1520 printf("NodeInfo NOOP"); 1521 break; 1522 case NI_QTYPE_SUPTYPES: 1523 pr_suptypes(ni, end - (u_char *)ni); 1524 break; 1525 case NI_QTYPE_NODEADDR: 1526 pr_nodeaddr(ni, end - (u_char *)ni); 1527 break; 1528 case NI_QTYPE_FQDN: 1529 default: /* XXX: for backward compatibility */ 1530 cp = (u_char *)ni + ICMP6_NIRLEN; 1531 if (buf[off + ICMP6_NIRLEN] == 1532 cc - off - ICMP6_NIRLEN - 1) 1533 oldfqdn = 1; 1534 else 1535 oldfqdn = 0; 1536 if (oldfqdn) { 1537 cp++; /* skip length */ 1538 while (cp < end) { 1539 safeputc(*cp & 0xff); 1540 cp++; 1541 } 1542 } else { 1543 i = 0; 1544 while (cp < end) { 1545 if (dnsdecode((const u_char **)&cp, end, 1546 (const u_char *)(ni + 1), dnsname, 1547 sizeof(dnsname)) == NULL) { 1548 printf("???"); 1549 break; 1550 } 1551 /* 1552 * name-lookup special handling for 1553 * truncated name 1554 */ 1555 if (cp + 1 <= end && !*cp && 1556 strlen(dnsname) > 0) { 1557 dnsname[strlen(dnsname) - 1] = '\0'; 1558 cp++; 1559 } 1560 printf("%s%s", i > 0 ? "," : "", 1561 dnsname); 1562 } 1563 } 1564 if (options & F_VERBOSE) { 1565 int32_t ttl; 1566 int comma = 0; 1567 1568 printf(" ("); /*)*/ 1569 1570 switch (ni->ni_code) { 1571 case ICMP6_NI_REFUSED: 1572 printf("refused"); 1573 comma++; 1574 break; 1575 case ICMP6_NI_UNKNOWN: 1576 printf("unknown qtype"); 1577 comma++; 1578 break; 1579 } 1580 1581 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1582 /* case of refusion, unknown */ 1583 /*(*/ 1584 putchar(')'); 1585 goto fqdnend; 1586 } 1587 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]); 1588 if (comma) 1589 printf(","); 1590 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1591 printf("TTL=%d:meaningless", 1592 (int)ttl); 1593 } else { 1594 if (ttl < 0) { 1595 printf("TTL=%d:invalid", ttl); 1596 } else 1597 printf("TTL=%d", ttl); 1598 } 1599 comma++; 1600 1601 if (oldfqdn) { 1602 if (comma) 1603 printf(","); 1604 printf("03 draft"); 1605 comma++; 1606 } else { 1607 cp = (u_char *)ni + ICMP6_NIRLEN; 1608 if (cp == end) { 1609 if (comma) 1610 printf(","); 1611 printf("no name"); 1612 comma++; 1613 } 1614 } 1615 1616 if (buf[off + ICMP6_NIRLEN] != 1617 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1618 if (comma) 1619 printf(","); 1620 printf("invalid namelen:%d/%lu", 1621 buf[off + ICMP6_NIRLEN], 1622 (u_long)cc - off - ICMP6_NIRLEN - 1); 1623 comma++; 1624 } 1625 /*(*/ 1626 putchar(')'); 1627 } 1628 fqdnend: 1629 ; 1630 } 1631 } else { 1632 /* We've got something other than an ECHOREPLY */ 1633 if (!(options & F_VERBOSE)) 1634 return; 1635 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1636 pr_icmph(icp, end); 1637 } 1638 1639 if (!(options & F_FLOOD)) { 1640 putchar('\n'); 1641 if (options & F_VERBOSE) 1642 pr_exthdrs(mhdr); 1643 fflush(stdout); 1644 } 1645 #undef safeputc 1646 } 1647 1648 void 1649 pr_exthdrs(struct msghdr *mhdr) 1650 { 1651 ssize_t bufsize; 1652 void *bufp; 1653 struct cmsghdr *cm; 1654 1655 bufsize = 0; 1656 bufp = mhdr->msg_control; 1657 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1658 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1659 if (cm->cmsg_level != IPPROTO_IPV6) 1660 continue; 1661 1662 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp); 1663 if (bufsize <= 0) 1664 continue; 1665 switch (cm->cmsg_type) { 1666 case IPV6_HOPOPTS: 1667 printf(" HbH Options: "); 1668 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1669 break; 1670 case IPV6_DSTOPTS: 1671 #ifdef IPV6_RTHDRDSTOPTS 1672 case IPV6_RTHDRDSTOPTS: 1673 #endif 1674 printf(" Dst Options: "); 1675 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1676 break; 1677 case IPV6_RTHDR: 1678 printf(" Routing: "); 1679 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize); 1680 break; 1681 } 1682 } 1683 } 1684 1685 #ifdef USE_RFC3542 1686 void 1687 pr_ip6opt(void *extbuf, size_t bufsize) 1688 { 1689 struct ip6_hbh *ext; 1690 int currentlen; 1691 u_int8_t type; 1692 socklen_t extlen, len; 1693 void *databuf; 1694 size_t offset; 1695 u_int16_t value2; 1696 u_int32_t value4; 1697 1698 ext = (struct ip6_hbh *)extbuf; 1699 extlen = (ext->ip6h_len + 1) * 8; 1700 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1701 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1702 1703 /* 1704 * Bounds checking on the ancillary data buffer: 1705 * subtract the size of a cmsg structure from the buffer size. 1706 */ 1707 if (bufsize < (extlen + CMSG_SPACE(0))) { 1708 extlen = bufsize - CMSG_SPACE(0); 1709 warnx("options truncated, showing only %u (total=%u)", 1710 (unsigned int)(extlen / 8 - 1), 1711 (unsigned int)(ext->ip6h_len)); 1712 } 1713 1714 currentlen = 0; 1715 while (1) { 1716 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1717 &type, &len, &databuf); 1718 if (currentlen == -1) 1719 break; 1720 switch (type) { 1721 /* 1722 * Note that inet6_opt_next automatically skips any padding 1723 * optins. 1724 */ 1725 case IP6OPT_JUMBO: 1726 offset = 0; 1727 offset = inet6_opt_get_val(databuf, offset, 1728 &value4, sizeof(value4)); 1729 printf(" Jumbo Payload Opt: Length %u\n", 1730 (u_int32_t)ntohl(value4)); 1731 break; 1732 /* FIXME: RFC3542 option is IP6OPT_ROUTER_ALERT. */ 1733 case IP6OPT_RTALERT: 1734 offset = 0; 1735 offset = inet6_opt_get_val(databuf, offset, 1736 &value2, sizeof(value2)); 1737 printf(" Router Alert Opt: Type %u\n", 1738 ntohs(value2)); 1739 break; 1740 default: 1741 printf(" Received Opt %u len %lu\n", 1742 type, (unsigned long)len); 1743 break; 1744 } 1745 } 1746 return; 1747 } 1748 #else /* !USE_RFC3542 */ 1749 /* ARGSUSED */ 1750 void 1751 pr_ip6opt(void *extbuf __unused, size_t bufsize __unused) 1752 { 1753 putchar('\n'); 1754 return; 1755 } 1756 #endif /* USE_RFC3542 */ 1757 1758 #ifdef USE_RFC3542 1759 void 1760 pr_rthdr(void *extbuf, size_t bufsize __unused) 1761 { 1762 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1763 1764 /* print fixed part of the header */ 1765 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1766 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1767 printf("segments unknown, "); 1768 printf("%d left\n", rh->ip6r_segleft); 1769 return; 1770 1771 } 1772 1773 #else /* !USE_RFC3542 */ 1774 /* ARGSUSED */ 1775 void 1776 pr_rthdr(void *extbuf __unused) 1777 { 1778 putchar('\n'); 1779 return; 1780 } 1781 #endif /* USE_RFC3542 */ 1782 1783 int 1784 pr_bitrange(u_int32_t v, int soff, int ii) 1785 { 1786 int off; 1787 int i; 1788 1789 off = 0; 1790 while (off < 32) { 1791 /* shift till we have 0x01 */ 1792 if ((v & 0x01) == 0) { 1793 if (ii > 1) 1794 printf("-%u", soff + off - 1); 1795 ii = 0; 1796 switch (v & 0x0f) { 1797 case 0x00: 1798 v >>= 4; 1799 off += 4; 1800 continue; 1801 case 0x08: 1802 v >>= 3; 1803 off += 3; 1804 continue; 1805 case 0x04: case 0x0c: 1806 v >>= 2; 1807 off += 2; 1808 continue; 1809 default: 1810 v >>= 1; 1811 off += 1; 1812 continue; 1813 } 1814 } 1815 1816 /* we have 0x01 with us */ 1817 for (i = 0; i < 32 - off; i++) { 1818 if ((v & (0x01 << i)) == 0) 1819 break; 1820 } 1821 if (!ii) 1822 printf(" %u", soff + off); 1823 ii += i; 1824 v >>= i; off += i; 1825 } 1826 return ii; 1827 } 1828 1829 /* struct icmp6_nodeinfo *ni: ni->qtype must be SUPTYPES */ 1830 void 1831 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 1832 { 1833 size_t clen; 1834 u_int32_t v; 1835 const u_char *cp, *end; 1836 u_int16_t cur; 1837 struct cbit { 1838 u_int16_t words; /*32bit count*/ 1839 u_int16_t skip; 1840 } cbit; 1841 #define MAXQTYPES (1 << 16) 1842 size_t off; 1843 int b; 1844 1845 cp = (u_char *)(ni + 1); 1846 end = ((u_char *)ni) + nilen; 1847 cur = 0; 1848 b = 0; 1849 1850 printf("NodeInfo Supported Qtypes"); 1851 if (options & F_VERBOSE) { 1852 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 1853 printf(", compressed bitmap"); 1854 else 1855 printf(", raw bitmap"); 1856 } 1857 1858 while (cp < end) { 1859 clen = (size_t)(end - cp); 1860 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 1861 if (clen == 0 || clen > MAXQTYPES / 8 || 1862 clen % sizeof(v)) { 1863 printf("???"); 1864 return; 1865 } 1866 } else { 1867 if (clen < sizeof(cbit) || clen % sizeof(v)) 1868 return; 1869 memcpy(&cbit, cp, sizeof(cbit)); 1870 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 1871 clen) 1872 return; 1873 cp += sizeof(cbit); 1874 clen = ntohs(cbit.words) * sizeof(v); 1875 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 1876 MAXQTYPES) 1877 return; 1878 } 1879 1880 for (off = 0; off < clen; off += sizeof(v)) { 1881 memcpy(&v, cp + off, sizeof(v)); 1882 v = (u_int32_t)ntohl(v); 1883 b = pr_bitrange(v, (int)(cur + off * 8), b); 1884 } 1885 /* flush the remaining bits */ 1886 b = pr_bitrange(0, (int)(cur + off * 8), b); 1887 1888 cp += clen; 1889 cur += clen * 8; 1890 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 1891 cur += ntohs(cbit.skip) * 32; 1892 } 1893 } 1894 1895 /* struct icmp6_nodeinfo *ni: ni->qtype must be NODEADDR */ 1896 void 1897 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 1898 { 1899 u_char *cp = (u_char *)(ni + 1); 1900 char ntop_buf[INET6_ADDRSTRLEN]; 1901 int withttl = 0; 1902 1903 nilen -= sizeof(struct icmp6_nodeinfo); 1904 1905 if (options & F_VERBOSE) { 1906 switch (ni->ni_code) { 1907 case ICMP6_NI_REFUSED: 1908 printf("refused"); 1909 break; 1910 case ICMP6_NI_UNKNOWN: 1911 printf("unknown qtype"); 1912 break; 1913 } 1914 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 1915 printf(" truncated"); 1916 } 1917 putchar('\n'); 1918 if (nilen <= 0) 1919 printf(" no address\n"); 1920 1921 /* 1922 * In icmp-name-lookups 05 and later, TTL of each returned address 1923 * is contained in the resposne. We try to detect the version 1924 * by the length of the data, but note that the detection algorithm 1925 * is incomplete. We assume the latest draft by default. 1926 */ 1927 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 1928 withttl = 1; 1929 while (nilen > 0) { 1930 u_int32_t ttl = 0; 1931 1932 if (withttl) { 1933 /* XXX: alignment? */ 1934 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp); 1935 cp += sizeof(u_int32_t); 1936 nilen -= sizeof(u_int32_t); 1937 } 1938 1939 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 1940 NULL) 1941 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 1942 printf(" %s", ntop_buf); 1943 if (withttl) { 1944 if (ttl == 0xffffffff) { 1945 /* 1946 * XXX: can this convention be applied to all 1947 * type of TTL (i.e. non-ND TTL)? 1948 */ 1949 printf("(TTL=infty)"); 1950 } 1951 else 1952 printf("(TTL=%u)", ttl); 1953 } 1954 putchar('\n'); 1955 1956 nilen -= sizeof(struct in6_addr); 1957 cp += sizeof(struct in6_addr); 1958 } 1959 } 1960 1961 int 1962 get_hoplim(struct msghdr *mhdr) 1963 { 1964 struct cmsghdr *cm; 1965 1966 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1967 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1968 if (cm->cmsg_len == 0) 1969 return(-1); 1970 1971 if (cm->cmsg_level == IPPROTO_IPV6 && 1972 cm->cmsg_type == IPV6_HOPLIMIT && 1973 cm->cmsg_len == CMSG_LEN(sizeof(int))) 1974 return(*(int *)CMSG_DATA(cm)); 1975 } 1976 1977 return(-1); 1978 } 1979 1980 struct in6_pktinfo * 1981 get_rcvpktinfo(struct msghdr *mhdr) 1982 { 1983 struct cmsghdr *cm; 1984 1985 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1986 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1987 if (cm->cmsg_len == 0) 1988 return(NULL); 1989 1990 if (cm->cmsg_level == IPPROTO_IPV6 && 1991 cm->cmsg_type == IPV6_PKTINFO && 1992 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) 1993 return((struct in6_pktinfo *)CMSG_DATA(cm)); 1994 } 1995 1996 return(NULL); 1997 } 1998 1999 #ifdef IPV6_RECVPATHMTU 2000 int 2001 get_pathmtu(struct msghdr *mhdr) 2002 { 2003 struct cmsghdr *cm; 2004 struct ip6_mtuinfo *mtuctl = NULL; 2005 2006 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2007 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2008 if (cm->cmsg_len == 0) 2009 return(0); 2010 2011 if (cm->cmsg_level == IPPROTO_IPV6 && 2012 cm->cmsg_type == IPV6_PATHMTU && 2013 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2014 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm); 2015 2016 /* 2017 * If the notified destination is different from 2018 * the one we are pinging, just ignore the info. 2019 * We check the scope ID only when both notified value 2020 * and our own value have non-0 values, because we may 2021 * have used the default scope zone ID for sending, 2022 * in which case the scope ID value is 0. 2023 */ 2024 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr, 2025 &dst.sin6_addr) || 2026 (mtuctl->ip6m_addr.sin6_scope_id && 2027 dst.sin6_scope_id && 2028 mtuctl->ip6m_addr.sin6_scope_id != 2029 dst.sin6_scope_id)) { 2030 if ((options & F_VERBOSE) != 0) { 2031 printf("path MTU for %s is notified. " 2032 "(ignored)\n", 2033 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr, 2034 sizeof(mtuctl->ip6m_addr))); 2035 } 2036 return(0); 2037 } 2038 2039 /* 2040 * Ignore an invalid MTU. XXX: can we just believe 2041 * the kernel check? 2042 */ 2043 if (mtuctl->ip6m_mtu < IPV6_MMTU) 2044 return(0); 2045 2046 /* notification for our destination. return the MTU. */ 2047 return((int)mtuctl->ip6m_mtu); 2048 } 2049 } 2050 return(0); 2051 } 2052 #endif 2053 2054 /* 2055 * tvsub -- 2056 * Subtract 2 timeval structs: out = out - in. Out is assumed to 2057 * be >= in. 2058 */ 2059 void 2060 tvsub(struct timeval *out, struct timeval *in) 2061 { 2062 if ((out->tv_usec -= in->tv_usec) < 0) { 2063 --out->tv_sec; 2064 out->tv_usec += 1000000; 2065 } 2066 out->tv_sec -= in->tv_sec; 2067 } 2068 2069 /* 2070 * onint -- 2071 * SIGINT handler. 2072 */ 2073 /* ARGSUSED */ 2074 void 2075 onint(int sig __unused) 2076 { 2077 summary(); 2078 2079 signal(SIGINT, SIG_DFL); 2080 kill(getpid(), SIGINT); 2081 2082 /* NOTREACHED */ 2083 exit(1); 2084 } 2085 2086 /* 2087 * summary -- 2088 * Print out statistics. 2089 */ 2090 void 2091 summary(void) 2092 { 2093 2094 printf("\n--- %s ping6 statistics ---\n", hostname); 2095 printf("%ld packets transmitted, ", ntransmitted); 2096 printf("%ld packets received, ", nreceived); 2097 if (nrepeats) 2098 printf("+%ld duplicates, ", nrepeats); 2099 if (ntransmitted) { 2100 if (nreceived > ntransmitted) 2101 printf("-- somebody's duplicating packets!"); 2102 else 2103 printf("%.1f%% packet loss", 2104 ((((double)ntransmitted - nreceived) * 100.0) / 2105 ntransmitted)); 2106 } 2107 putchar('\n'); 2108 if (nreceived && timing) { 2109 /* Only display average to microseconds */ 2110 double num = nreceived + nrepeats; 2111 double avg = tsum / num; 2112 double dev = sqrt(tsumsq / num - avg * avg); 2113 printf( 2114 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2115 tmin, avg, tmax, dev); 2116 fflush(stdout); 2117 } 2118 fflush(stdout); 2119 } 2120 2121 /*subject type*/ 2122 static const char *niqcode[] = { 2123 "IPv6 address", 2124 "DNS label", /*or empty*/ 2125 "IPv4 address", 2126 }; 2127 2128 /*result code*/ 2129 static const char *nircode[] = { 2130 "Success", "Refused", "Unknown", 2131 }; 2132 2133 2134 /* 2135 * pr_icmph -- 2136 * Print a descriptive string about an ICMP header. 2137 */ 2138 void 2139 pr_icmph(struct icmp6_hdr *icp, u_char *end) 2140 { 2141 char ntop_buf[INET6_ADDRSTRLEN]; 2142 struct nd_redirect *red; 2143 struct icmp6_nodeinfo *ni; 2144 char dnsname[MAXDNAME + 1]; 2145 const u_char *cp; 2146 size_t l; 2147 2148 switch (icp->icmp6_type) { 2149 case ICMP6_DST_UNREACH: 2150 switch (icp->icmp6_code) { 2151 case ICMP6_DST_UNREACH_NOROUTE: 2152 printf("No Route to Destination\n"); 2153 break; 2154 case ICMP6_DST_UNREACH_ADMIN: 2155 printf("Destination Administratively " 2156 "Unreachable\n"); 2157 break; 2158 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2159 printf("Destination Unreachable Beyond Scope\n"); 2160 break; 2161 case ICMP6_DST_UNREACH_ADDR: 2162 printf("Destination Host Unreachable\n"); 2163 break; 2164 case ICMP6_DST_UNREACH_NOPORT: 2165 printf("Destination Port Unreachable\n"); 2166 break; 2167 default: 2168 printf("Destination Unreachable, Bad Code: %d\n", 2169 icp->icmp6_code); 2170 break; 2171 } 2172 /* Print returned IP header information */ 2173 pr_retip((struct ip6_hdr *)(icp + 1), end); 2174 break; 2175 case ICMP6_PACKET_TOO_BIG: 2176 printf("Packet too big mtu = %d\n", 2177 (int)ntohl(icp->icmp6_mtu)); 2178 pr_retip((struct ip6_hdr *)(icp + 1), end); 2179 break; 2180 case ICMP6_TIME_EXCEEDED: 2181 switch (icp->icmp6_code) { 2182 case ICMP6_TIME_EXCEED_TRANSIT: 2183 printf("Time to live exceeded\n"); 2184 break; 2185 case ICMP6_TIME_EXCEED_REASSEMBLY: 2186 printf("Frag reassembly time exceeded\n"); 2187 break; 2188 default: 2189 printf("Time exceeded, Bad Code: %d\n", 2190 icp->icmp6_code); 2191 break; 2192 } 2193 pr_retip((struct ip6_hdr *)(icp + 1), end); 2194 break; 2195 case ICMP6_PARAM_PROB: 2196 printf("Parameter problem: "); 2197 switch (icp->icmp6_code) { 2198 case ICMP6_PARAMPROB_HEADER: 2199 printf("Erroneous Header "); 2200 break; 2201 case ICMP6_PARAMPROB_NEXTHEADER: 2202 printf("Unknown Nextheader "); 2203 break; 2204 case ICMP6_PARAMPROB_OPTION: 2205 printf("Unrecognized Option "); 2206 break; 2207 default: 2208 printf("Bad code(%d) ", icp->icmp6_code); 2209 break; 2210 } 2211 printf("pointer = 0x%02x\n", (u_int32_t)ntohl(icp->icmp6_pptr)); 2212 pr_retip((struct ip6_hdr *)(icp + 1), end); 2213 break; 2214 case ICMP6_ECHO_REQUEST: 2215 printf("Echo Request"); 2216 /* XXX ID + Seq + Data */ 2217 break; 2218 case ICMP6_ECHO_REPLY: 2219 printf("Echo Reply"); 2220 /* XXX ID + Seq + Data */ 2221 break; 2222 case ICMP6_MEMBERSHIP_QUERY: 2223 printf("Listener Query"); 2224 break; 2225 case ICMP6_MEMBERSHIP_REPORT: 2226 printf("Listener Report"); 2227 break; 2228 case ICMP6_MEMBERSHIP_REDUCTION: 2229 printf("Listener Done"); 2230 break; 2231 case ND_ROUTER_SOLICIT: 2232 printf("Router Solicitation"); 2233 break; 2234 case ND_ROUTER_ADVERT: 2235 printf("Router Advertisement"); 2236 break; 2237 case ND_NEIGHBOR_SOLICIT: 2238 printf("Neighbor Solicitation"); 2239 break; 2240 case ND_NEIGHBOR_ADVERT: 2241 printf("Neighbor Advertisement"); 2242 break; 2243 case ND_REDIRECT: 2244 red = (struct nd_redirect *)icp; 2245 printf("Redirect\n"); 2246 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2247 sizeof(ntop_buf))) 2248 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2249 printf("Destination: %s", ntop_buf); 2250 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2251 sizeof(ntop_buf))) 2252 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2253 printf(" New Target: %s", ntop_buf); 2254 break; 2255 case ICMP6_NI_QUERY: 2256 printf("Node Information Query"); 2257 /* XXX ID + Seq + Data */ 2258 ni = (struct icmp6_nodeinfo *)icp; 2259 l = end - (u_char *)(ni + 1); 2260 printf(", "); 2261 switch (ntohs(ni->ni_qtype)) { 2262 case NI_QTYPE_NOOP: 2263 printf("NOOP"); 2264 break; 2265 case NI_QTYPE_SUPTYPES: 2266 printf("Supported qtypes"); 2267 break; 2268 case NI_QTYPE_FQDN: 2269 printf("DNS name"); 2270 break; 2271 case NI_QTYPE_NODEADDR: 2272 printf("nodeaddr"); 2273 break; 2274 case NI_QTYPE_IPV4ADDR: 2275 printf("IPv4 nodeaddr"); 2276 break; 2277 default: 2278 printf("unknown qtype"); 2279 break; 2280 } 2281 if (options & F_VERBOSE) { 2282 switch (ni->ni_code) { 2283 case ICMP6_NI_SUBJ_IPV6: 2284 if (l == sizeof(struct in6_addr) && 2285 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2286 sizeof(ntop_buf)) != NULL) { 2287 printf(", subject=%s(%s)", 2288 niqcode[ni->ni_code], ntop_buf); 2289 } else { 2290 #if 1 2291 /* backward compat to -W */ 2292 printf(", oldfqdn"); 2293 #else 2294 printf(", invalid"); 2295 #endif 2296 } 2297 break; 2298 case ICMP6_NI_SUBJ_FQDN: 2299 if (end == (u_char *)(ni + 1)) { 2300 printf(", no subject"); 2301 break; 2302 } 2303 printf(", subject=%s", niqcode[ni->ni_code]); 2304 cp = (const u_char *)(ni + 1); 2305 if (dnsdecode(&cp, end, NULL, dnsname, 2306 sizeof(dnsname)) != NULL) 2307 printf("(%s)", dnsname); 2308 else 2309 printf("(invalid)"); 2310 break; 2311 case ICMP6_NI_SUBJ_IPV4: 2312 if (l == sizeof(struct in_addr) && 2313 inet_ntop(AF_INET, ni + 1, ntop_buf, 2314 sizeof(ntop_buf)) != NULL) { 2315 printf(", subject=%s(%s)", 2316 niqcode[ni->ni_code], ntop_buf); 2317 } else 2318 printf(", invalid"); 2319 break; 2320 default: 2321 printf(", invalid"); 2322 break; 2323 } 2324 } 2325 break; 2326 case ICMP6_NI_REPLY: 2327 printf("Node Information Reply"); 2328 /* XXX ID + Seq + Data */ 2329 ni = (struct icmp6_nodeinfo *)icp; 2330 printf(", "); 2331 switch (ntohs(ni->ni_qtype)) { 2332 case NI_QTYPE_NOOP: 2333 printf("NOOP"); 2334 break; 2335 case NI_QTYPE_SUPTYPES: 2336 printf("Supported qtypes"); 2337 break; 2338 case NI_QTYPE_FQDN: 2339 printf("DNS name"); 2340 break; 2341 case NI_QTYPE_NODEADDR: 2342 printf("nodeaddr"); 2343 break; 2344 case NI_QTYPE_IPV4ADDR: 2345 printf("IPv4 nodeaddr"); 2346 break; 2347 default: 2348 printf("unknown qtype"); 2349 break; 2350 } 2351 if (options & F_VERBOSE) { 2352 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0])) 2353 printf(", invalid"); 2354 else 2355 printf(", %s", nircode[ni->ni_code]); 2356 } 2357 break; 2358 default: 2359 printf("Bad ICMP type: %d", icp->icmp6_type); 2360 } 2361 } 2362 2363 /* 2364 * pr_iph -- 2365 * Print an IP6 header. 2366 */ 2367 void 2368 pr_iph(struct ip6_hdr *ip6) 2369 { 2370 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2371 u_int8_t tc; 2372 char ntop_buf[INET6_ADDRSTRLEN]; 2373 2374 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2375 tc = (tc >> 4) & 0x0f; 2376 tc |= (ip6->ip6_vfc << 4); 2377 2378 printf("Vr TC Flow Plen Nxt Hlim\n"); 2379 printf(" %1x %02x %05x %04x %02x %02x\n", 2380 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2381 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2382 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2383 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2384 printf("%s->", ntop_buf); 2385 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2386 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2387 printf("%s\n", ntop_buf); 2388 } 2389 2390 /* 2391 * pr_addr -- 2392 * Return an ascii host address as a dotted quad and optionally with 2393 * a hostname. 2394 */ 2395 const char * 2396 pr_addr(struct sockaddr *addr, int addrlen) 2397 { 2398 static char buf[NI_MAXHOST]; 2399 int flag = 0; 2400 2401 if ((options & F_HOSTNAME) == 0) 2402 flag |= NI_NUMERICHOST; 2403 2404 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) 2405 return (buf); 2406 else 2407 return "?"; 2408 } 2409 2410 /* 2411 * pr_retip -- 2412 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2413 */ 2414 void 2415 pr_retip(struct ip6_hdr *ip6, u_char *end) 2416 { 2417 u_char *cp = (u_char *)ip6, nh; 2418 int hlen; 2419 2420 if (end - (u_char *)ip6 < (int)sizeof(*ip6)) { 2421 printf("IP6"); 2422 goto trunc; 2423 } 2424 pr_iph(ip6); 2425 hlen = sizeof(*ip6); 2426 2427 nh = ip6->ip6_nxt; 2428 cp += hlen; 2429 while (end - cp >= 8) { 2430 switch (nh) { 2431 case IPPROTO_HOPOPTS: 2432 printf("HBH "); 2433 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2434 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2435 break; 2436 case IPPROTO_DSTOPTS: 2437 printf("DSTOPT "); 2438 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2439 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2440 break; 2441 case IPPROTO_FRAGMENT: 2442 printf("FRAG "); 2443 hlen = sizeof(struct ip6_frag); 2444 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2445 break; 2446 case IPPROTO_ROUTING: 2447 printf("RTHDR "); 2448 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2449 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2450 break; 2451 #ifdef IPSEC 2452 case IPPROTO_AH: 2453 printf("AH "); 2454 hlen = (((struct ah *)cp)->ah_len+2) << 2; 2455 nh = ((struct ah *)cp)->ah_nxt; 2456 break; 2457 #endif 2458 case IPPROTO_ICMPV6: 2459 printf("ICMP6: type = %d, code = %d\n", 2460 *cp, *(cp + 1)); 2461 return; 2462 case IPPROTO_ESP: 2463 printf("ESP\n"); 2464 return; 2465 case IPPROTO_TCP: 2466 printf("TCP: from port %u, to port %u (decimal)\n", 2467 (*cp * 256 + *(cp + 1)), 2468 (*(cp + 2) * 256 + *(cp + 3))); 2469 return; 2470 case IPPROTO_UDP: 2471 printf("UDP: from port %u, to port %u (decimal)\n", 2472 (*cp * 256 + *(cp + 1)), 2473 (*(cp + 2) * 256 + *(cp + 3))); 2474 return; 2475 default: 2476 printf("Unknown Header(%d)\n", nh); 2477 return; 2478 } 2479 2480 if ((cp += hlen) >= end) 2481 goto trunc; 2482 } 2483 if (end - cp < 8) 2484 goto trunc; 2485 2486 putchar('\n'); 2487 return; 2488 2489 trunc: 2490 printf("...\n"); 2491 return; 2492 } 2493 2494 void 2495 fill(char *bp, char *patp) 2496 { 2497 int ii, jj, kk; 2498 int pat[16]; 2499 char *cp; 2500 2501 for (cp = patp; *cp; cp++) 2502 if (!isxdigit(*cp)) 2503 errx(1, "patterns must be specified as hex digits"); 2504 ii = sscanf(patp, 2505 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2506 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2507 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2508 &pat[13], &pat[14], &pat[15]); 2509 2510 /* xxx */ 2511 if (ii > 0) 2512 for (kk = 0; 2513 kk <= MAXDATALEN - (8 + (int)sizeof(struct tv32) + ii); 2514 kk += ii) 2515 for (jj = 0; jj < ii; ++jj) 2516 bp[jj + kk] = pat[jj]; 2517 if (!(options & F_QUIET)) { 2518 printf("PATTERN: 0x"); 2519 for (jj = 0; jj < ii; ++jj) 2520 printf("%02x", bp[jj] & 0xFF); 2521 printf("\n"); 2522 } 2523 } 2524 2525 #ifdef IPSEC 2526 #ifdef IPSEC_POLICY_IPSEC 2527 int 2528 setpolicy(int so __unused, char *policy) 2529 { 2530 char *buf; 2531 2532 if (policy == NULL) 2533 return 0; /* ignore */ 2534 2535 buf = ipsec_set_policy(policy, strlen(policy)); 2536 if (buf == NULL) 2537 errx(1, "%s", ipsec_strerror()); 2538 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2539 ipsec_get_policylen(buf)) < 0) 2540 warnx("Unable to set IPsec policy"); 2541 free(buf); 2542 2543 return 0; 2544 } 2545 #endif 2546 #endif 2547 2548 char * 2549 nigroup(char *name) 2550 { 2551 char *p; 2552 char *q; 2553 MD5_CTX ctxt; 2554 u_int8_t digest[16]; 2555 u_int8_t c; 2556 size_t l; 2557 char hbuf[NI_MAXHOST]; 2558 struct in6_addr in6; 2559 2560 p = strchr(name, '.'); 2561 if (!p) 2562 p = name + strlen(name); 2563 l = p - name; 2564 if (l > 63 || l > sizeof(hbuf) - 1) 2565 return NULL; /*label too long*/ 2566 strncpy(hbuf, name, l); 2567 hbuf[(int)l] = '\0'; 2568 2569 for (q = name; *q; q++) { 2570 if (isupper(*(unsigned char *)q)) 2571 *q = tolower(*(unsigned char *)q); 2572 } 2573 2574 /* generate 8 bytes of pseudo-random value. */ 2575 memset(&ctxt, 0, sizeof(ctxt)); 2576 MD5Init(&ctxt); 2577 c = l & 0xff; 2578 MD5Update(&ctxt, &c, sizeof(c)); 2579 MD5Update(&ctxt, (unsigned char *)name, l); 2580 MD5Final(digest, &ctxt); 2581 2582 if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1) 2583 return NULL; /*XXX*/ 2584 bcopy(digest, &in6.s6_addr[12], 4); 2585 2586 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2587 return NULL; 2588 2589 return strdup(hbuf); 2590 } 2591 2592 void 2593 usage(void) 2594 { 2595 fprintf(stderr, 2596 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 2597 "A" 2598 #endif 2599 "usage: ping6 [-" 2600 "d" 2601 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 2602 "E" 2603 #endif 2604 "fH" 2605 #ifdef IPV6_USE_MIN_MTU 2606 "m" 2607 #endif 2608 "nNqtvwW] " 2609 "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n" 2610 " [-h hoplimit] [-I interface] [-i wait] [-l preload]" 2611 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2612 " [-P policy]" 2613 #endif 2614 "\n" 2615 " [-p pattern] [-S sourceaddr] [-s packetsize] " 2616 "[hops ...] host\n"); 2617 exit(1); 2618 } 2619