1 /* $KAME: ping6.c,v 1.126 2001/05/17 03:39:08 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 32 * @(#)ping.c 8.1 (Berkeley) 6/5/93 33 * $FreeBSD: src/sbin/ping6/ping6.c,v 1.4.2.10 2002/12/09 03:04:44 suz Exp $ 34 * $DragonFly: src/sbin/ping6/ping6.c,v 1.8 2005/03/05 22:27:08 cpressey Exp $ 35 */ 36 37 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */ 38 39 /* 40 * Copyright (c) 1989, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * Mike Muuss. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 */ 74 75 /* 76 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 77 * measure round-trip-delays and packet loss across network paths. 78 * 79 * Author - 80 * Mike Muuss 81 * U. S. Army Ballistic Research Laboratory 82 * December, 1983 83 * 84 * Status - 85 * Public Domain. Distribution Unlimited. 86 * Bugs - 87 * More statistics could always be gathered. 88 * This program has to run SUID to ROOT to access the ICMP socket. 89 */ 90 /* 91 * NOTE: 92 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics 93 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link* 94 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of 95 * network attached to 1 or more interfaces) 96 */ 97 98 #include <sys/param.h> 99 #include <sys/uio.h> 100 #include <sys/socket.h> 101 #include <sys/time.h> 102 103 #include <net/if.h> 104 #include <net/route.h> 105 106 #include <netinet/in.h> 107 #include <netinet/ip6.h> 108 #include <netinet/icmp6.h> 109 #include <arpa/inet.h> 110 #include <arpa/nameser.h> 111 #include <netdb.h> 112 113 #include <ctype.h> 114 #include <err.h> 115 #include <errno.h> 116 #include <fcntl.h> 117 #include <math.h> 118 #include <signal.h> 119 #include <stdio.h> 120 #include <stdlib.h> 121 #include <string.h> 122 #include <unistd.h> 123 124 #ifdef IPSEC 125 #include <netinet6/ah.h> 126 #include <netinet6/ipsec.h> 127 #endif 128 129 #include <md5.h> 130 131 #define MAXPACKETLEN 131072 132 #define IP6LEN 40 133 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 134 #define ICMP6ECHOTMLEN sizeof(struct timeval) 135 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 136 /* FQDN case, 64 bits of nonce + 32 bits ttl */ 137 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 138 #define EXTRA 256 /* for AH and various other headers. weird. */ 139 #define DEFDATALEN ICMP6ECHOTMLEN 140 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 141 #define NROUTES 9 /* number of record route slots */ 142 143 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 144 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 145 #define SET(bit) (A(bit) |= B(bit)) 146 #define CLR(bit) (A(bit) &= (~B(bit))) 147 #define TST(bit) (A(bit) & B(bit)) 148 149 #define F_FLOOD 0x0001 150 #define F_INTERVAL 0x0002 151 #define F_PINGFILLED 0x0008 152 #define F_QUIET 0x0010 153 #define F_RROUTE 0x0020 154 #define F_SO_DEBUG 0x0040 155 #define F_VERBOSE 0x0100 156 #ifdef IPSEC 157 #ifdef IPSEC_POLICY_IPSEC 158 #define F_POLICY 0x0400 159 #else 160 #define F_AUTHHDR 0x0200 161 #define F_ENCRYPT 0x0400 162 #endif /*IPSEC_POLICY_IPSEC*/ 163 #endif /*IPSEC*/ 164 #define F_NODEADDR 0x0800 165 #define F_FQDN 0x1000 166 #define F_INTERFACE 0x2000 167 #define F_SRCADDR 0x4000 168 #ifdef IPV6_REACHCONF 169 #define F_REACHCONF 0x8000 170 #endif 171 #define F_HOSTNAME 0x10000 172 #define F_FQDNOLD 0x20000 173 #define F_NIGROUP 0x40000 174 #define F_SUPTYPES 0x80000 175 #define F_NOMINMTU 0x100000 176 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 177 u_int options; 178 179 #define IN6LEN sizeof(struct in6_addr) 180 #define SA6LEN sizeof(struct sockaddr_in6) 181 #define DUMMY_PORT 10101 182 183 #define SIN6(s) ((struct sockaddr_in6 *)(s)) 184 185 /* 186 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 187 * number of received sequence numbers we can keep track of. Change 128 188 * to 8192 for complete accuracy... 189 */ 190 #define MAX_DUP_CHK (8 * 8192) 191 int mx_dup_ck = MAX_DUP_CHK; 192 char rcvd_tbl[MAX_DUP_CHK / 8]; 193 194 struct addrinfo *res; 195 struct sockaddr_in6 dst; /* who to ping6 */ 196 struct sockaddr_in6 src; /* src addr of this packet */ 197 int datalen = DEFDATALEN; 198 int s; /* socket file descriptor */ 199 u_char outpack[MAXPACKETLEN]; 200 char BSPACE = '\b'; /* characters written for flood */ 201 char DOT = '.'; 202 char *hostname; 203 int ident; /* process id to identify our packets */ 204 u_int8_t nonce[8]; /* nonce field for node information */ 205 struct in6_addr srcaddr; 206 int hoplimit = -1; /* hoplimit */ 207 int pathmtu = 0; /* path MTU for the destination. 0 = unspec. */ 208 209 /* counters */ 210 long npackets; /* max packets to transmit */ 211 long nreceived; /* # of packets we got back */ 212 long nrepeats; /* number of duplicates */ 213 long ntransmitted; /* sequence # for outbound packets = #sent */ 214 struct timeval interval = {1, 0}; /* interval between packets */ 215 216 /* timing */ 217 int timing; /* flag to do timing */ 218 double tmin = 999999999.0; /* minimum round trip time */ 219 double tmax = 0.0; /* maximum round trip time */ 220 double tsum = 0.0; /* sum of all times, for doing average */ 221 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 222 223 /* for node addresses */ 224 u_short naflags; 225 226 /* for ancillary data(advanced API) */ 227 struct msghdr smsghdr; 228 struct iovec smsgiov; 229 char *scmsg = 0; 230 231 volatile int signo; 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 int main(int, char *[]); 239 void fill(char *, char *); 240 int get_hoplim(struct msghdr *); 241 242 #ifdef IPV6_RECVPATHMTU 243 int get_pathmtu(struct msghdr *); 244 #else 245 #define get_pathmtu(mhdr) (0) 246 #endif 247 248 #ifdef IPV6_USE_MTU 249 void set_pathmtu(int); 250 #else 251 #define set_pathmtu(mtu) 252 #endif 253 254 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); 255 void onsignal(int); 256 void retransmit(void); 257 void onint(int); 258 size_t pingerlen(void); 259 int pinger(void); 260 const char *pr_addr(struct sockaddr *, int); 261 void pr_icmph(struct icmp6_hdr *, u_char *); 262 void pr_iph(struct ip6_hdr *); 263 void pr_suptypes(struct icmp6_nodeinfo *, size_t); 264 void pr_nodeaddr(struct icmp6_nodeinfo *, int); 265 int myechoreply(const struct icmp6_hdr *); 266 int mynireply(const struct icmp6_nodeinfo *); 267 char *dnsdecode(const u_char **, const u_char *, const u_char *, 268 u_char *, size_t); 269 void pr_pack(u_char *, int, struct msghdr *); 270 void pr_exthdrs(struct msghdr *); 271 void pr_ip6opt(void *); 272 void pr_rthdr(void *); 273 int pr_bitrange(u_int32_t, int, int); 274 void pr_retip(struct ip6_hdr *, u_char *); 275 void summary(void); 276 void tvsub(struct timeval *, struct timeval *); 277 int setpolicy(int, char *); 278 char *nigroup(char *); 279 void usage(void); 280 281 int 282 main(int argc, char **argv) 283 { 284 struct itimerval itimer; 285 struct sockaddr_in6 from; 286 struct timeval timeout, *tv; 287 struct addrinfo hints; 288 fd_set *fdmaskp; 289 int fdmasks; 290 int cc, i; 291 int ch, fromlen, hold, packlen, preload, optval, ret_ga; 292 u_char *datap, *packet; 293 char *e, *target, *ifname = NULL; 294 int ip6optlen = 0; 295 struct cmsghdr *scmsgp = NULL; 296 int sockbufsize = 0; 297 int usepktinfo = 0; 298 struct in6_pktinfo *pktinfo = NULL; 299 #ifdef USE_RFC2292BIS 300 struct ip6_rthdr *rthdr = NULL; 301 #endif 302 #ifdef IPSEC_POLICY_IPSEC 303 char *policy_in = NULL; 304 char *policy_out = NULL; 305 #endif 306 double intval; 307 size_t rthlen; 308 309 /* just to be sure */ 310 memset(&smsghdr, 0, sizeof(smsghdr)); 311 memset(&smsgiov, 0, sizeof(smsgiov)); 312 313 preload = 0; 314 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 315 #ifndef IPSEC 316 #define ADDOPTS 317 #else 318 #ifdef IPSEC_POLICY_IPSEC 319 #define ADDOPTS "P:" 320 #else 321 #define ADDOPTS "AE" 322 #endif /*IPSEC_POLICY_IPSEC*/ 323 #endif 324 while ((ch = getopt(argc, argv, 325 "a:b:c:dfHh:I:i:l:mnNp:qRS:s:tvwW" ADDOPTS)) != -1) { 326 #undef ADDOPTS 327 switch (ch) { 328 case 'a': 329 { 330 char *cp; 331 332 options &= ~F_NOUSERDATA; 333 options |= F_NODEADDR; 334 for (cp = optarg; *cp != '\0'; cp++) { 335 switch (*cp) { 336 case 'a': 337 naflags |= NI_NODEADDR_FLAG_ALL; 338 break; 339 case 'c': 340 case 'C': 341 naflags |= NI_NODEADDR_FLAG_COMPAT; 342 break; 343 case 'l': 344 case 'L': 345 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 346 break; 347 case 's': 348 case 'S': 349 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 350 break; 351 case 'g': 352 case 'G': 353 naflags |= NI_NODEADDR_FLAG_GLOBAL; 354 break; 355 case 'A': /* experimental. not in the spec */ 356 #ifdef NI_NODEADDR_FLAG_ANYCAST 357 naflags |= NI_NODEADDR_FLAG_ANYCAST; 358 break; 359 #else 360 errx(1, 361 "-a A is not supported on the platform"); 362 /*NOTREACHED*/ 363 #endif 364 default: 365 usage(); 366 /*NOTREACHED*/ 367 } 368 } 369 break; 370 } 371 case 'b': 372 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 373 sockbufsize = atoi(optarg); 374 #else 375 err(1, 376 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 377 #endif 378 break; 379 case 'c': 380 npackets = strtol(optarg, &e, 10); 381 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 382 errx(1, 383 "illegal number of packets -- %s", optarg); 384 break; 385 case 'd': 386 options |= F_SO_DEBUG; 387 break; 388 case 'f': 389 if (getuid()) { 390 errno = EPERM; 391 errx(1, "Must be superuser to flood ping"); 392 } 393 options |= F_FLOOD; 394 setbuf(stdout, (char *)NULL); 395 break; 396 case 'H': 397 options |= F_HOSTNAME; 398 break; 399 case 'h': /* hoplimit */ 400 hoplimit = strtol(optarg, &e, 10); 401 if (255 < hoplimit || hoplimit < -1) 402 errx(1, 403 "illegal hoplimit -- %s", optarg); 404 break; 405 case 'I': 406 ifname = optarg; 407 options |= F_INTERFACE; 408 #ifndef USE_SIN6_SCOPE_ID 409 usepktinfo++; 410 #endif 411 break; 412 case 'i': /* wait between sending packets */ 413 intval = strtod(optarg, &e); 414 if (*optarg == '\0' || *e != '\0') 415 errx(1, "illegal timing interval %s", optarg); 416 if (intval < 1 && getuid()) { 417 errx(1, "%s: only root may use interval < 1s", 418 strerror(EPERM)); 419 } 420 interval.tv_sec = (long)intval; 421 interval.tv_usec = 422 (long)((intval - interval.tv_sec) * 1000000); 423 if (interval.tv_sec < 0) 424 errx(1, "illegal timing interval %s", optarg); 425 /* less than 1/hz does not make sense */ 426 if (interval.tv_sec == 0 && interval.tv_usec < 10000) { 427 warnx("too small interval, raised to 0.01"); 428 interval.tv_usec = 10000; 429 } 430 options |= F_INTERVAL; 431 break; 432 case 'l': 433 if (getuid()) { 434 errno = EPERM; 435 errx(1, "Must be superuser to preload"); 436 } 437 preload = strtol(optarg, &e, 10); 438 if (preload < 0 || *optarg == '\0' || *e != '\0') 439 errx(1, "illegal preload value -- %s", optarg); 440 break; 441 case 'm': 442 #ifdef IPV6_USE_MIN_MTU 443 options |= F_NOMINMTU; 444 break; 445 #else 446 errx(1, "-%c is not supported on this platform", ch); 447 /*NOTREACHED*/ 448 #endif 449 case 'n': 450 options &= ~F_HOSTNAME; 451 break; 452 case 'N': 453 options |= F_NIGROUP; 454 break; 455 case 'p': /* fill buffer with user pattern */ 456 options |= F_PINGFILLED; 457 fill((char *)datap, optarg); 458 break; 459 case 'q': 460 options |= F_QUIET; 461 break; 462 case 'R': 463 #ifdef IPV6_REACHCONF 464 options |= F_REACHCONF; 465 break; 466 #else 467 errx(1, "-R is not supported in this configuration"); 468 #endif 469 case 'S': 470 /* XXX: use getaddrinfo? */ 471 if (inet_pton(AF_INET6, optarg, (void *)&srcaddr) != 1) 472 errx(1, "invalid IPv6 address: %s", optarg); 473 options |= F_SRCADDR; 474 usepktinfo++; 475 break; 476 case 's': /* size of packet to send */ 477 datalen = strtol(optarg, &e, 10); 478 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 479 errx(1, "illegal datalen value -- %s", optarg); 480 if (datalen > MAXDATALEN) { 481 errx(1, 482 "datalen value too large, maximum is %d", 483 MAXDATALEN); 484 } 485 break; 486 case 't': 487 options &= ~F_NOUSERDATA; 488 options |= F_SUPTYPES; 489 break; 490 case 'v': 491 options |= F_VERBOSE; 492 break; 493 case 'w': 494 options &= ~F_NOUSERDATA; 495 options |= F_FQDN; 496 break; 497 case 'W': 498 options &= ~F_NOUSERDATA; 499 options |= F_FQDNOLD; 500 break; 501 #ifdef IPSEC 502 #ifdef IPSEC_POLICY_IPSEC 503 case 'P': 504 options |= F_POLICY; 505 if (!strncmp("in", optarg, 2)) { 506 if ((policy_in = strdup(optarg)) == NULL) 507 errx(1, "strdup"); 508 } else if (!strncmp("out", optarg, 3)) { 509 if ((policy_out = strdup(optarg)) == NULL) 510 errx(1, "strdup"); 511 } else 512 errx(1, "invalid security policy"); 513 break; 514 #else 515 case 'A': 516 options |= F_AUTHHDR; 517 break; 518 case 'E': 519 options |= F_ENCRYPT; 520 break; 521 #endif /*IPSEC_POLICY_IPSEC*/ 522 #endif /*IPSEC*/ 523 default: 524 usage(); 525 /*NOTREACHED*/ 526 } 527 } 528 argc -= optind; 529 argv += optind; 530 531 if (argc < 1) { 532 usage(); 533 /*NOTREACHED*/ 534 } 535 536 if (argc > 1) { 537 #ifdef IPV6_RECVRTHDR /* 2292bis */ 538 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 539 argc - 1)); 540 #else /* RFC2292 */ 541 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 542 #endif 543 if (rthlen == 0) { 544 errx(1, "too many intermediate hops"); 545 /*NOTREACHED*/ 546 } 547 ip6optlen += rthlen; 548 } 549 550 if (options & F_NIGROUP) { 551 target = nigroup(argv[argc - 1]); 552 if (target == NULL) { 553 usage(); 554 /*NOTREACHED*/ 555 } 556 } else 557 target = argv[argc - 1]; 558 559 /* getaddrinfo */ 560 bzero(&hints, sizeof(struct addrinfo)); 561 hints.ai_flags = AI_CANONNAME; 562 hints.ai_family = AF_INET6; 563 hints.ai_socktype = SOCK_RAW; 564 hints.ai_protocol = IPPROTO_ICMPV6; 565 566 ret_ga = getaddrinfo(target, NULL, &hints, &res); 567 if (ret_ga) { 568 fprintf(stderr, "ping6: %s\n", gai_strerror(ret_ga)); 569 exit(1); 570 } 571 if (res->ai_canonname) 572 hostname = res->ai_canonname; 573 else 574 hostname = target; 575 576 if (!res->ai_addr) 577 errx(1, "getaddrinfo failed"); 578 579 memcpy(&dst, res->ai_addr, res->ai_addrlen); 580 581 if ((s = socket(res->ai_family, res->ai_socktype, 582 res->ai_protocol)) < 0) 583 err(1, "socket"); 584 585 /* 586 * let the kerel pass extension headers of incoming packets, 587 * for privileged socket options 588 */ 589 if ((options & F_VERBOSE) != 0) { 590 int opton = 1; 591 592 #ifdef IPV6_RECVHOPOPTS 593 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 594 sizeof(opton))) 595 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 596 #else /* old adv. API */ 597 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 598 sizeof(opton))) 599 err(1, "setsockopt(IPV6_HOPOPTS)"); 600 #endif 601 #ifdef IPV6_RECVDSTOPTS 602 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 603 sizeof(opton))) 604 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 605 #else /* old adv. API */ 606 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 607 sizeof(opton))) 608 err(1, "setsockopt(IPV6_DSTOPTS)"); 609 #endif 610 #ifdef IPV6_RECVRTHDRDSTOPTS 611 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 612 sizeof(opton))) 613 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 614 #endif 615 } 616 617 /* revoke root privilege */ 618 seteuid(getuid()); 619 setuid(getuid()); 620 621 if (options & F_FLOOD && options & F_INTERVAL) 622 errx(1, "-f and -i incompatible options"); 623 624 if ((options & F_NOUSERDATA) == 0) { 625 if (datalen >= (int)sizeof(struct timeval)) { 626 /* we can time transfer */ 627 timing = 1; 628 } else 629 timing = 0; 630 /* in F_VERBOSE case, we may get non-echoreply packets*/ 631 if (options & F_VERBOSE) 632 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 633 else 634 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 635 } else { 636 /* suppress timing for node information query */ 637 timing = 0; 638 datalen = 2048; 639 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 640 } 641 642 if (!(packet = (u_char *)malloc((u_int)packlen))) 643 err(1, "Unable to allocate packet"); 644 if (!(options & F_PINGFILLED)) 645 for (i = ICMP6ECHOLEN; i < packlen; ++i) 646 *datap++ = i; 647 648 ident = getpid() & 0xFFFF; 649 #ifndef __OpenBSD__ 650 gettimeofday(&timeout, NULL); 651 srand((unsigned int)(timeout.tv_sec ^ timeout.tv_usec ^ (long)ident)); 652 memset(nonce, 0, sizeof(nonce)); 653 for (i = 0; i < (int)sizeof(nonce); i += sizeof(int)) 654 *((int *)&nonce[i]) = rand(); 655 #else 656 memset(nonce, 0, sizeof(nonce)); 657 for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t)) 658 *((u_int32_t *)&nonce[i]) = arc4random(); 659 #endif 660 661 hold = 1; 662 663 if (options & F_SO_DEBUG) 664 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 665 sizeof(hold)); 666 optval = IPV6_DEFHLIM; 667 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 668 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 669 &optval, sizeof(optval)) == -1) 670 err(1, "IPV6_MULTICAST_HOPS"); 671 #ifdef IPV6_USE_MIN_MTU 672 if ((options & F_NOMINMTU) == 0) { 673 optval = 1; 674 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 675 &optval, sizeof(optval)) == -1) 676 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 677 } 678 #ifdef IPV6_RECVPATHMTU 679 else { 680 optval = 1; 681 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, 682 &optval, sizeof(optval)) == -1) 683 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 684 } 685 #endif /* IPV6_RECVPATHMTU */ 686 #endif /* IPV6_USE_MIN_MTU */ 687 688 #ifdef IPSEC 689 #ifdef IPSEC_POLICY_IPSEC 690 if (options & F_POLICY) { 691 if (setpolicy(s, policy_in) < 0) 692 errx(1, "%s", ipsec_strerror()); 693 if (setpolicy(s, policy_out) < 0) 694 errx(1, "%s", ipsec_strerror()); 695 } 696 #else 697 if (options & F_AUTHHDR) { 698 optval = IPSEC_LEVEL_REQUIRE; 699 #ifdef IPV6_AUTH_TRANS_LEVEL 700 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 701 &optval, sizeof(optval)) == -1) 702 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 703 #else /* old def */ 704 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 705 &optval, sizeof(optval)) == -1) 706 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 707 #endif 708 } 709 if (options & F_ENCRYPT) { 710 optval = IPSEC_LEVEL_REQUIRE; 711 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 712 &optval, sizeof(optval)) == -1) 713 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 714 } 715 #endif /*IPSEC_POLICY_IPSEC*/ 716 #endif 717 718 #ifdef ICMP6_FILTER 719 { 720 struct icmp6_filter filt; 721 if (!(options & F_VERBOSE)) { 722 ICMP6_FILTER_SETBLOCKALL(&filt); 723 if ((options & F_FQDN) || (options & F_FQDNOLD) || 724 (options & F_NODEADDR) || (options & F_SUPTYPES)) 725 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 726 else 727 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 728 } else { 729 ICMP6_FILTER_SETPASSALL(&filt); 730 } 731 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 732 sizeof(filt)) < 0) 733 err(1, "setsockopt(ICMP6_FILTER)"); 734 } 735 #endif /*ICMP6_FILTER*/ 736 737 /* let the kerel pass extension headers of incoming packets */ 738 if ((options & F_VERBOSE) != 0) { 739 int opton = 1; 740 741 #ifdef IPV6_RECVRTHDR 742 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 743 sizeof(opton))) 744 err(1, "setsockopt(IPV6_RECVRTHDR)"); 745 #else /* old adv. API */ 746 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton, 747 sizeof(opton))) 748 err(1, "setsockopt(IPV6_RTHDR)"); 749 #endif 750 } 751 752 /* 753 optval = 1; 754 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 755 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 756 &optval, sizeof(optval)) == -1) 757 err(1, "IPV6_MULTICAST_LOOP"); 758 */ 759 760 /* Specify the outgoing interface and/or the source address */ 761 if (usepktinfo) 762 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 763 764 if (hoplimit != -1) 765 ip6optlen += CMSG_SPACE(sizeof(int)); 766 767 #ifdef IPV6_REACHCONF 768 if (options & F_REACHCONF) 769 ip6optlen += CMSG_SPACE(0); 770 #endif 771 772 /* set IP6 packet options */ 773 if (ip6optlen) { 774 if ((scmsg = (char *)malloc(ip6optlen)) == 0) 775 errx(1, "can't allocate enough memory"); 776 smsghdr.msg_control = (caddr_t)scmsg; 777 smsghdr.msg_controllen = ip6optlen; 778 scmsgp = (struct cmsghdr *)scmsg; 779 } 780 if (usepktinfo) { 781 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); 782 memset(pktinfo, 0, sizeof(*pktinfo)); 783 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 784 scmsgp->cmsg_level = IPPROTO_IPV6; 785 scmsgp->cmsg_type = IPV6_PKTINFO; 786 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 787 } 788 789 /* set the outgoing interface */ 790 if (ifname) { 791 #ifndef USE_SIN6_SCOPE_ID 792 /* pktinfo must have already been allocated */ 793 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0) 794 errx(1, "%s: invalid interface name", ifname); 795 #else 796 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 797 errx(1, "%s: invalid interface name", ifname); 798 #endif 799 } 800 /* set the source address */ 801 if (options & F_SRCADDR)/* pktinfo must be valid */ 802 pktinfo->ipi6_addr = srcaddr; 803 804 if (hoplimit != -1) { 805 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 806 scmsgp->cmsg_level = IPPROTO_IPV6; 807 scmsgp->cmsg_type = IPV6_HOPLIMIT; 808 *(int *)(CMSG_DATA(scmsgp)) = hoplimit; 809 810 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 811 } 812 #ifdef IPV6_REACHCONF 813 if (options & F_REACHCONF) { 814 scmsgp->cmsg_len = CMSG_LEN(0); 815 scmsgp->cmsg_level = IPPROTO_IPV6; 816 scmsgp->cmsg_type = IPV6_REACHCONF; 817 818 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 819 } 820 #endif 821 822 if (argc > 1) { /* some intermediate addrs are specified */ 823 int hops, error; 824 #ifdef USE_RFC2292BIS 825 int rthdrlen; 826 #endif 827 828 #ifdef USE_RFC2292BIS 829 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 830 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 831 scmsgp->cmsg_level = IPPROTO_IPV6; 832 scmsgp->cmsg_type = IPV6_RTHDR; 833 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 834 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 835 IPV6_RTHDR_TYPE_0, argc - 1); 836 if (rthdr == NULL) 837 errx(1, "can't initialize rthdr"); 838 #else /* old advanced API */ 839 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp, 840 IPV6_RTHDR_TYPE_0)) == 0) 841 errx(1, "can't initialize rthdr"); 842 #endif /* USE_RFC2292BIS */ 843 844 for (hops = 0; hops < argc - 1; hops++) { 845 struct addrinfo *iaip; 846 847 if ((error = getaddrinfo(argv[hops], NULL, &hints, 848 &iaip))) 849 errx(1, "%s", gai_strerror(error)); 850 if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6) 851 errx(1, 852 "bad addr family of an intermediate addr"); 853 854 #ifdef USE_RFC2292BIS 855 if (inet6_rth_add(rthdr, 856 &(SIN6(iaip->ai_addr))->sin6_addr)) 857 errx(1, "can't add an intermediate node"); 858 #else /* old advanced API */ 859 if (inet6_rthdr_add(scmsgp, 860 &(SIN6(iaip->ai_addr))->sin6_addr, 861 IPV6_RTHDR_LOOSE)) 862 errx(1, "can't add an intermediate node"); 863 #endif /* USE_RFC2292BIS */ 864 freeaddrinfo(iaip); 865 } 866 867 #ifndef USE_RFC2292BIS 868 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE)) 869 errx(1, "can't set the last flag"); 870 #endif 871 872 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 873 } 874 875 { 876 /* 877 * source selection 878 */ 879 int dummy, len = sizeof(src); 880 881 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 882 err(1, "UDP socket"); 883 884 src.sin6_family = AF_INET6; 885 src.sin6_addr = dst.sin6_addr; 886 src.sin6_port = ntohs(DUMMY_PORT); 887 src.sin6_scope_id = dst.sin6_scope_id; 888 889 #ifdef USE_RFC2292BIS 890 if (pktinfo && 891 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 892 (void *)pktinfo, sizeof(*pktinfo))) 893 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 894 895 if (hoplimit != -1 && 896 setsockopt(dummy, IPPROTO_IPV6, IPV6_HOPLIMIT, 897 (void *)&hoplimit, sizeof(hoplimit))) 898 err(1, "UDP setsockopt(IPV6_HOPLIMIT)"); 899 900 if (rthdr && 901 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 902 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 903 err(1, "UDP setsockopt(IPV6_RTHDR)"); 904 #else /* old advanced API */ 905 if (smsghdr.msg_control && 906 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS, 907 (void *)smsghdr.msg_control, smsghdr.msg_controllen)) 908 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)"); 909 #endif 910 911 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 912 err(1, "UDP connect"); 913 914 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 915 err(1, "getsockname"); 916 917 close(dummy); 918 } 919 920 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 921 if (sockbufsize) { 922 if (datalen > sockbufsize) 923 warnx("you need -b to increase socket buffer size"); 924 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 925 sizeof(sockbufsize)) < 0) 926 err(1, "setsockopt(SO_SNDBUF)"); 927 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 928 sizeof(sockbufsize)) < 0) 929 err(1, "setsockopt(SO_RCVBUF)"); 930 } 931 else { 932 if (datalen > 8 * 1024) /*XXX*/ 933 warnx("you need -b to increase socket buffer size"); 934 /* 935 * When pinging the broadcast address, you can get a lot of 936 * answers. Doing something so evil is useful if you are trying 937 * to stress the ethernet, or just want to fill the arp cache 938 * to get some stuff for /etc/ethers. 939 */ 940 hold = 48 * 1024; 941 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 942 sizeof(hold)); 943 } 944 #endif 945 946 optval = 1; 947 #ifndef USE_SIN6_SCOPE_ID 948 #ifdef IPV6_RECVPKTINFO 949 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 950 sizeof(optval)) < 0) 951 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 952 #else /* old adv. API */ 953 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 954 sizeof(optval)) < 0) 955 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 956 #endif 957 #endif /* USE_SIN6_SCOPE_ID */ 958 #ifdef IPV6_RECVHOPLIMIT 959 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 960 sizeof(optval)) < 0) 961 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 962 #else /* old adv. API */ 963 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 964 sizeof(optval)) < 0) 965 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 966 #endif 967 968 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 969 (unsigned long)(pingerlen() - 8)); 970 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 971 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 972 973 while (preload--) /* Fire off them quickies. */ 974 pinger(); 975 976 signal(SIGINT, onsignal); 977 #ifdef SIGINFO 978 signal(SIGINFO, onsignal); 979 #endif 980 981 if ((options & F_FLOOD) == 0) { 982 signal(SIGALRM, onsignal); 983 itimer.it_interval = interval; 984 itimer.it_value = interval; 985 setitimer(ITIMER_REAL, &itimer, NULL); 986 if (ntransmitted == 0) 987 retransmit(); 988 } 989 990 fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask); 991 if ((fdmaskp = malloc(fdmasks)) == NULL) 992 err(1, "malloc"); 993 994 signo = seenalrm = seenint = 0; 995 #ifdef SIGINFO 996 seeninfo = 0; 997 #endif 998 999 for (;;) { 1000 struct msghdr m; 1001 struct cmsghdr *cm; 1002 u_char buf[1024]; 1003 struct iovec iov[2]; 1004 1005 /* signal handling */ 1006 if (seenalrm) { 1007 retransmit(); 1008 seenalrm = 0; 1009 continue; 1010 } 1011 if (seenint) { 1012 onint(SIGINT); 1013 seenint = 0; 1014 continue; 1015 } 1016 #ifdef SIGINFO 1017 if (seeninfo) { 1018 summary(); 1019 seeninfo = 0; 1020 continue; 1021 } 1022 #endif 1023 1024 if (options & F_FLOOD) { 1025 pinger(); 1026 timeout.tv_sec = 0; 1027 timeout.tv_usec = 10000; 1028 tv = &timeout; 1029 } else 1030 tv = NULL; 1031 memset(fdmaskp, 0, fdmasks); 1032 FD_SET(s, fdmaskp); 1033 cc = select(s + 1, fdmaskp, NULL, NULL, tv); 1034 if (cc < 0) { 1035 if (errno != EINTR) { 1036 warn("select"); 1037 sleep(1); 1038 } 1039 continue; 1040 } else if (cc == 0) 1041 continue; 1042 1043 fromlen = sizeof(from); 1044 m.msg_name = (caddr_t)&from; 1045 m.msg_namelen = sizeof(from); 1046 memset(&iov, 0, sizeof(iov)); 1047 iov[0].iov_base = (caddr_t)packet; 1048 iov[0].iov_len = packlen; 1049 m.msg_iov = iov; 1050 m.msg_iovlen = 1; 1051 cm = (struct cmsghdr *)buf; 1052 m.msg_control = (caddr_t)buf; 1053 m.msg_controllen = sizeof(buf); 1054 1055 cc = recvmsg(s, &m, 0); 1056 if (cc < 0) { 1057 if (errno != EINTR) { 1058 warn("recvmsg"); 1059 sleep(1); 1060 } 1061 continue; 1062 } else if (cc == 0) { 1063 int mtu; 1064 1065 /* 1066 * receive control messages only. Process the 1067 * exceptions (currently the only possiblity is 1068 * a path MTU notification.) 1069 */ 1070 if ((mtu = get_pathmtu(&m)) > 0) { 1071 if ((options & F_VERBOSE) != 0) { 1072 printf("new path MTU (%d) is " 1073 "notified\n", mtu); 1074 } 1075 set_pathmtu(mtu); 1076 } 1077 continue; 1078 } else { 1079 /* 1080 * an ICMPv6 message (probably an echoreply) arrived. 1081 */ 1082 pr_pack(packet, cc, &m); 1083 } 1084 if (npackets && nreceived >= npackets) 1085 break; 1086 } 1087 summary(); 1088 exit(nreceived == 0); 1089 } 1090 1091 void 1092 onsignal(int sig) 1093 { 1094 signo = sig; 1095 switch (sig) { 1096 case SIGALRM: 1097 seenalrm++; 1098 break; 1099 case SIGINT: 1100 seenint++; 1101 break; 1102 #ifdef SIGINFO 1103 case SIGINFO: 1104 seeninfo++; 1105 break; 1106 #endif 1107 } 1108 } 1109 1110 /* 1111 * retransmit -- 1112 * This routine transmits another ping6. 1113 */ 1114 void 1115 retransmit(void) 1116 { 1117 struct itimerval itimer; 1118 1119 if (pinger() == 0) 1120 return; 1121 1122 /* 1123 * If we're not transmitting any more packets, change the timer 1124 * to wait two round-trip times if we've received any packets or 1125 * ten seconds if we haven't. 1126 */ 1127 #define MAXWAIT 10 1128 if (nreceived) { 1129 itimer.it_value.tv_sec = 2 * tmax / 1000; 1130 if (itimer.it_value.tv_sec == 0) 1131 itimer.it_value.tv_sec = 1; 1132 } else 1133 itimer.it_value.tv_sec = MAXWAIT; 1134 itimer.it_interval.tv_sec = 0; 1135 itimer.it_interval.tv_usec = 0; 1136 itimer.it_value.tv_usec = 0; 1137 1138 signal(SIGALRM, onint); 1139 setitimer(ITIMER_REAL, &itimer, NULL); 1140 } 1141 1142 /* 1143 * pinger -- 1144 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1145 * will be added on by the kernel. The ID field is our UNIX process ID, 1146 * and the sequence number is an ascending integer. The first 8 bytes 1147 * of the data portion are used to hold a UNIX "timeval" struct in VAX 1148 * byte-order, to compute the round-trip time. 1149 */ 1150 size_t 1151 pingerlen(void) 1152 { 1153 size_t l; 1154 1155 if (options & F_FQDN) 1156 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1157 else if (options & F_FQDNOLD) 1158 l = ICMP6_NIQLEN; 1159 else if (options & F_NODEADDR) 1160 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1161 else if (options & F_SUPTYPES) 1162 l = ICMP6_NIQLEN; 1163 else 1164 l = ICMP6ECHOLEN + datalen; 1165 1166 return l; 1167 } 1168 1169 int 1170 pinger(void) 1171 { 1172 struct icmp6_hdr *icp; 1173 struct iovec iov[2]; 1174 int i, cc; 1175 struct icmp6_nodeinfo *nip; 1176 int seq; 1177 1178 if (npackets && ntransmitted >= npackets) 1179 return(-1); /* no more transmission */ 1180 1181 icp = (struct icmp6_hdr *)outpack; 1182 nip = (struct icmp6_nodeinfo *)outpack; 1183 memset(icp, 0, sizeof(*icp)); 1184 icp->icmp6_cksum = 0; 1185 seq = ntransmitted++; 1186 CLR(seq % mx_dup_ck); 1187 1188 if (options & F_FQDN) { 1189 icp->icmp6_type = ICMP6_NI_QUERY; 1190 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1191 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1192 nip->ni_flags = htons(0); 1193 1194 memcpy(nip->icmp6_ni_nonce, nonce, 1195 sizeof(nip->icmp6_ni_nonce)); 1196 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1197 1198 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1199 sizeof(dst.sin6_addr)); 1200 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1201 datalen = 0; 1202 } else if (options & F_FQDNOLD) { 1203 /* packet format in 03 draft - no Subject data on queries */ 1204 icp->icmp6_type = ICMP6_NI_QUERY; 1205 icp->icmp6_code = 0; /* code field is always 0 */ 1206 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1207 nip->ni_flags = htons(0); 1208 1209 memcpy(nip->icmp6_ni_nonce, nonce, 1210 sizeof(nip->icmp6_ni_nonce)); 1211 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1212 1213 cc = ICMP6_NIQLEN; 1214 datalen = 0; 1215 } else if (options & F_NODEADDR) { 1216 icp->icmp6_type = ICMP6_NI_QUERY; 1217 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1218 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1219 nip->ni_flags = naflags; 1220 1221 memcpy(nip->icmp6_ni_nonce, nonce, 1222 sizeof(nip->icmp6_ni_nonce)); 1223 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1224 1225 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1226 sizeof(dst.sin6_addr)); 1227 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1228 datalen = 0; 1229 } else if (options & F_SUPTYPES) { 1230 icp->icmp6_type = ICMP6_NI_QUERY; 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 memcpy(nip->icmp6_ni_nonce, nonce, 1237 sizeof(nip->icmp6_ni_nonce)); 1238 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1239 cc = ICMP6_NIQLEN; 1240 datalen = 0; 1241 } else { 1242 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1243 icp->icmp6_code = 0; 1244 icp->icmp6_id = htons(ident); 1245 icp->icmp6_seq = ntohs(seq); 1246 if (timing) 1247 gettimeofday((struct timeval *) 1248 &outpack[ICMP6ECHOLEN], NULL); 1249 cc = ICMP6ECHOLEN + datalen; 1250 } 1251 1252 #ifdef DIAGNOSTIC 1253 if (pingerlen() != cc) 1254 errx(1, "internal error; length mismatch"); 1255 #endif 1256 1257 smsghdr.msg_name = (caddr_t)&dst; 1258 smsghdr.msg_namelen = sizeof(dst); 1259 memset(&iov, 0, sizeof(iov)); 1260 iov[0].iov_base = (caddr_t)outpack; 1261 iov[0].iov_len = cc; 1262 smsghdr.msg_iov = iov; 1263 smsghdr.msg_iovlen = 1; 1264 1265 i = sendmsg(s, &smsghdr, 0); 1266 1267 if (i < 0 || i != cc) { 1268 if (i < 0) 1269 warn("sendmsg"); 1270 printf("ping6: wrote %s %d chars, ret=%d\n", hostname, cc, i); 1271 } 1272 if (!(options & F_QUIET) && options & F_FLOOD) 1273 write(STDOUT_FILENO, &DOT, 1); 1274 1275 return(0); 1276 } 1277 1278 int 1279 myechoreply(const struct icmp6_hdr *icp) 1280 { 1281 if (ntohs(icp->icmp6_id) == ident) 1282 return 1; 1283 else 1284 return 0; 1285 } 1286 1287 int 1288 mynireply(const struct icmp6_nodeinfo *nip) 1289 { 1290 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1291 nonce + sizeof(u_int16_t), 1292 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1293 return 1; 1294 else 1295 return 0; 1296 } 1297 1298 char * 1299 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, u_char *buf, 1300 size_t bufsiz) 1301 { 1302 int i = 0; 1303 const u_char *cp; 1304 char cresult[MAXDNAME + 1]; 1305 const u_char *comp; 1306 int l; 1307 1308 cp = *sp; 1309 *buf = '\0'; 1310 1311 if (cp >= ep) 1312 return NULL; 1313 while (cp < ep) { 1314 i = *cp; 1315 if (i == 0 || cp != *sp) { 1316 if (strlcat(buf, ".", bufsiz) >= bufsiz) 1317 return NULL; /*result overrun*/ 1318 } 1319 if (i == 0) 1320 break; 1321 cp++; 1322 1323 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1324 /* DNS compression */ 1325 if (!base) 1326 return NULL; 1327 1328 comp = base + (i & 0x3f); 1329 if (dnsdecode(&comp, cp, base, cresult, 1330 sizeof(cresult)) == NULL) 1331 return NULL; 1332 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1333 return NULL; /*result overrun*/ 1334 break; 1335 } else if ((i & 0x3f) == i) { 1336 if (i > ep - cp) 1337 return NULL; /*source overrun*/ 1338 while (i-- > 0 && cp < ep) { 1339 l = snprintf(cresult, sizeof(cresult), 1340 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1341 if (l >= (int)sizeof(cresult)) 1342 return NULL; 1343 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1344 return NULL; /*result overrun*/ 1345 cp++; 1346 } 1347 } else 1348 return NULL; /*invalid label*/ 1349 } 1350 if (i != 0) 1351 return NULL; /*not terminated*/ 1352 cp++; 1353 *sp = cp; 1354 return buf; 1355 } 1356 1357 /* 1358 * pr_pack -- 1359 * Print out the packet, if it came from us. This logic is necessary 1360 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1361 * which arrive ('tis only fair). This permits multiple copies of this 1362 * program to be run without having intermingled output (or statistics!). 1363 */ 1364 void 1365 pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1366 { 1367 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1368 struct icmp6_hdr *icp; 1369 struct icmp6_nodeinfo *ni; 1370 int i; 1371 int hoplim; 1372 struct sockaddr *from; 1373 int fromlen; 1374 u_char *cp = NULL, *dp, *end = buf + cc; 1375 struct in6_pktinfo *pktinfo = NULL; 1376 struct timeval tv, *tp; 1377 double triptime = 0; 1378 int dupflag; 1379 size_t off; 1380 int oldfqdn; 1381 u_int16_t seq; 1382 char dnsname[MAXDNAME + 1]; 1383 1384 gettimeofday(&tv, NULL); 1385 1386 if (!mhdr || !mhdr->msg_name || 1387 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1388 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1389 if (options & F_VERBOSE) 1390 warnx("invalid peername\n"); 1391 return; 1392 } 1393 from = (struct sockaddr *)mhdr->msg_name; 1394 fromlen = mhdr->msg_namelen; 1395 if (cc < (int)sizeof(struct icmp6_hdr)) { 1396 if (options & F_VERBOSE) 1397 warnx("packet too short (%d bytes) from %s\n", cc, 1398 pr_addr(from, fromlen)); 1399 return; 1400 } 1401 icp = (struct icmp6_hdr *)buf; 1402 ni = (struct icmp6_nodeinfo *)buf; 1403 off = 0; 1404 1405 if ((hoplim = get_hoplim(mhdr)) == -1) { 1406 warnx("failed to get receiving hop limit"); 1407 return; 1408 } 1409 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1410 warnx("failed to get receiving pakcet information"); 1411 return; 1412 } 1413 1414 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1415 seq = ntohs(icp->icmp6_seq); 1416 ++nreceived; 1417 if (timing) { 1418 tp = (struct timeval *)(icp + 1); 1419 tvsub(&tv, tp); 1420 triptime = ((double)tv.tv_sec) * 1000.0 + 1421 ((double)tv.tv_usec) / 1000.0; 1422 tsum += triptime; 1423 tsumsq += triptime * triptime; 1424 if (triptime < tmin) 1425 tmin = triptime; 1426 if (triptime > tmax) 1427 tmax = triptime; 1428 } 1429 1430 if (TST(seq % mx_dup_ck)) { 1431 ++nrepeats; 1432 --nreceived; 1433 dupflag = 1; 1434 } else { 1435 SET(seq % mx_dup_ck); 1436 dupflag = 0; 1437 } 1438 1439 if (options & F_QUIET) 1440 return; 1441 1442 if (options & F_FLOOD) 1443 write(STDOUT_FILENO, &BSPACE, 1); 1444 else { 1445 printf("%d bytes from %s, icmp_seq=%u", cc, 1446 pr_addr(from, fromlen), seq); 1447 printf(" hlim=%d", hoplim); 1448 if ((options & F_VERBOSE) != 0) { 1449 struct sockaddr_in6 dstsa; 1450 1451 memset(&dstsa, 0, sizeof(dstsa)); 1452 dstsa.sin6_family = AF_INET6; 1453 #ifdef SIN6_LEN 1454 dstsa.sin6_len = sizeof(dstsa); 1455 #endif 1456 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1457 dstsa.sin6_addr = pktinfo->ipi6_addr; 1458 printf(" dst=%s", 1459 pr_addr((struct sockaddr *)&dstsa, 1460 sizeof(dstsa))); 1461 } 1462 if (timing) 1463 printf(" time=%g ms", triptime); 1464 if (dupflag) 1465 printf("(DUP!)"); 1466 /* check the data */ 1467 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1468 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1469 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1470 if (*cp != *dp) { 1471 printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1472 break; 1473 } 1474 } 1475 } 1476 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1477 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce); 1478 ++nreceived; 1479 if (TST(seq % mx_dup_ck)) { 1480 ++nrepeats; 1481 --nreceived; 1482 dupflag = 1; 1483 } else { 1484 SET(seq % mx_dup_ck); 1485 dupflag = 0; 1486 } 1487 1488 if (options & F_QUIET) 1489 return; 1490 1491 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1492 1493 switch (ntohs(ni->ni_code)) { 1494 case ICMP6_NI_SUCCESS: 1495 break; 1496 case ICMP6_NI_REFUSED: 1497 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1498 goto fqdnend; 1499 case ICMP6_NI_UNKNOWN: 1500 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1501 goto fqdnend; 1502 default: 1503 printf("unknown code 0x%x, type 0x%x", 1504 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1505 goto fqdnend; 1506 } 1507 1508 switch (ntohs(ni->ni_qtype)) { 1509 case NI_QTYPE_NOOP: 1510 printf("NodeInfo NOOP"); 1511 break; 1512 case NI_QTYPE_SUPTYPES: 1513 pr_suptypes(ni, end - (u_char *)ni); 1514 break; 1515 case NI_QTYPE_NODEADDR: 1516 pr_nodeaddr(ni, end - (u_char *)ni); 1517 break; 1518 case NI_QTYPE_FQDN: 1519 default: /* XXX: for backward compatibility */ 1520 cp = (u_char *)ni + ICMP6_NIRLEN; 1521 if (buf[off + ICMP6_NIRLEN] == 1522 cc - off - ICMP6_NIRLEN - 1) 1523 oldfqdn = 1; 1524 else 1525 oldfqdn = 0; 1526 if (oldfqdn) { 1527 cp++; /* skip length */ 1528 while (cp < end) { 1529 safeputc(*cp & 0xff); 1530 cp++; 1531 } 1532 } else { 1533 i = 0; 1534 while (cp < end) { 1535 if (dnsdecode((const u_char **)&cp, end, 1536 (const u_char *)(ni + 1), dnsname, 1537 sizeof(dnsname)) == NULL) { 1538 printf("???"); 1539 break; 1540 } 1541 /* 1542 * name-lookup special handling for 1543 * truncated name 1544 */ 1545 if (cp + 1 <= end && !*cp && 1546 strlen(dnsname) > 0) { 1547 dnsname[strlen(dnsname) - 1] = '\0'; 1548 cp++; 1549 } 1550 printf("%s%s", i > 0 ? "," : "", 1551 dnsname); 1552 } 1553 } 1554 if (options & F_VERBOSE) { 1555 int32_t ttl; 1556 int comma = 0; 1557 1558 printf(" ("); /*)*/ 1559 1560 switch (ni->ni_code) { 1561 case ICMP6_NI_REFUSED: 1562 printf("refused"); 1563 comma++; 1564 break; 1565 case ICMP6_NI_UNKNOWN: 1566 printf("unknwon qtype"); 1567 comma++; 1568 break; 1569 } 1570 1571 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1572 /* case of refusion, unknown */ 1573 /*(*/ 1574 putchar(')'); 1575 goto fqdnend; 1576 } 1577 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]); 1578 if (comma) 1579 printf(","); 1580 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1581 printf("TTL=%d:meaningless", (int)ttl); 1582 } else { 1583 if (ttl < 0) { 1584 printf("TTL=%d:invalid", ttl); 1585 } else 1586 printf("TTL=%d", ttl); 1587 } 1588 comma++; 1589 1590 if (oldfqdn) { 1591 if (comma) 1592 printf(","); 1593 printf("03 draft"); 1594 comma++; 1595 } else { 1596 cp = (u_char *)ni + ICMP6_NIRLEN; 1597 if (cp == end) { 1598 if (comma) 1599 printf(","); 1600 printf("no name"); 1601 comma++; 1602 } 1603 } 1604 1605 if (buf[off + ICMP6_NIRLEN] != 1606 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1607 if (comma) 1608 printf(","); 1609 printf("invalid namelen:%d/%lu", 1610 buf[off + ICMP6_NIRLEN], 1611 (u_long)cc - off - ICMP6_NIRLEN - 1); 1612 comma++; 1613 } 1614 /*(*/ 1615 putchar(')'); 1616 } 1617 fqdnend: 1618 ; 1619 } 1620 } else { 1621 /* We've got something other than an ECHOREPLY */ 1622 if (!(options & F_VERBOSE)) 1623 return; 1624 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1625 pr_icmph(icp, end); 1626 } 1627 1628 if (!(options & F_FLOOD)) { 1629 putchar('\n'); 1630 if (options & F_VERBOSE) 1631 pr_exthdrs(mhdr); 1632 fflush(stdout); 1633 } 1634 #undef safeputc 1635 } 1636 1637 void 1638 pr_exthdrs(struct msghdr *mhdr) 1639 { 1640 struct cmsghdr *cm; 1641 1642 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1643 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1644 if (cm->cmsg_level != IPPROTO_IPV6) 1645 continue; 1646 1647 switch (cm->cmsg_type) { 1648 case IPV6_HOPOPTS: 1649 printf(" HbH Options: "); 1650 pr_ip6opt(CMSG_DATA(cm)); 1651 break; 1652 case IPV6_DSTOPTS: 1653 #ifdef IPV6_RTHDRDSTOPTS 1654 case IPV6_RTHDRDSTOPTS: 1655 #endif 1656 printf(" Dst Options: "); 1657 pr_ip6opt(CMSG_DATA(cm)); 1658 break; 1659 case IPV6_RTHDR: 1660 printf(" Routing: "); 1661 pr_rthdr(CMSG_DATA(cm)); 1662 break; 1663 } 1664 } 1665 } 1666 1667 #ifdef USE_RFC2292BIS 1668 void 1669 pr_ip6opt(void *extbuf) 1670 { 1671 struct ip6_hbh *ext; 1672 int currentlen; 1673 u_int8_t type; 1674 size_t extlen, len; 1675 void *databuf; 1676 size_t offset; 1677 u_int16_t value2; 1678 u_int32_t value4; 1679 1680 ext = (struct ip6_hbh *)extbuf; 1681 extlen = (ext->ip6h_len + 1) * 8; 1682 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1683 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1684 1685 currentlen = 0; 1686 while (1) { 1687 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1688 &type, &len, &databuf); 1689 if (currentlen == -1) 1690 break; 1691 switch (type) { 1692 /* 1693 * Note that inet6_opt_next automatically skips any padding 1694 * optins. 1695 */ 1696 case IP6OPT_JUMBO: 1697 offset = 0; 1698 offset = inet6_opt_get_val(databuf, offset, 1699 &value4, sizeof(value4)); 1700 printf(" Jumbo Payload Opt: Length %u\n", 1701 (u_int32_t)ntohl(value4)); 1702 break; 1703 case IP6OPT_ROUTER_ALERT: 1704 offset = 0; 1705 offset = inet6_opt_get_val(databuf, offset, 1706 &value2, sizeof(value2)); 1707 printf(" Router Alert Opt: Type %u\n", 1708 ntohs(value2)); 1709 break; 1710 default: 1711 printf(" Received Opt %u len %lu\n", 1712 type, (unsigned long)len); 1713 break; 1714 } 1715 } 1716 return; 1717 } 1718 #else /* !USE_RFC2292BIS */ 1719 /* ARGSUSED */ 1720 void 1721 pr_ip6opt(void *extbuf __unused) 1722 { 1723 putchar('\n'); 1724 return; 1725 } 1726 #endif /* USE_RFC2292BIS */ 1727 1728 #ifdef USE_RFC2292BIS 1729 void 1730 pr_rthdr(void *extbuf) 1731 { 1732 struct in6_addr *in6; 1733 char ntopbuf[INET6_ADDRSTRLEN]; 1734 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1735 int i, segments; 1736 1737 /* print fixed part of the header */ 1738 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1739 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1740 if ((segments = inet6_rth_segments(extbuf)) >= 0) 1741 printf("%d segments, ", segments); 1742 else 1743 printf("segments unknown, "); 1744 printf("%d left\n", rh->ip6r_segleft); 1745 1746 for (i = 0; i < segments; i++) { 1747 in6 = inet6_rth_getaddr(extbuf, i); 1748 if (in6 == NULL) 1749 printf(" [%d]<NULL>\n", i); 1750 else { 1751 if (!inet_ntop(AF_INET6, in6, ntopbuf, 1752 sizeof(ntopbuf))) 1753 strncpy(ntopbuf, "?", sizeof(ntopbuf)); 1754 printf(" [%d]%s\n", i, ntopbuf); 1755 } 1756 } 1757 1758 return; 1759 1760 } 1761 1762 #else /* !USE_RFC2292BIS */ 1763 /* ARGSUSED */ 1764 void 1765 pr_rthdr(void *extbuf __unused) 1766 { 1767 putchar('\n'); 1768 return; 1769 } 1770 #endif /* USE_RFC2292BIS */ 1771 1772 int 1773 pr_bitrange(u_int32_t v, int ss, int ii) 1774 { 1775 int off; 1776 int i; 1777 1778 off = 0; 1779 while (off < 32) { 1780 /* shift till we have 0x01 */ 1781 if ((v & 0x01) == 0) { 1782 if (ii > 1) 1783 printf("-%u", s + off - 1); 1784 ii = 0; 1785 switch (v & 0x0f) { 1786 case 0x00: 1787 v >>= 4; 1788 off += 4; 1789 continue; 1790 case 0x08: 1791 v >>= 3; 1792 off += 3; 1793 continue; 1794 case 0x04: case 0x0c: 1795 v >>= 2; 1796 off += 2; 1797 continue; 1798 default: 1799 v >>= 1; 1800 off += 1; 1801 continue; 1802 } 1803 } 1804 1805 /* we have 0x01 with us */ 1806 for (i = 0; i < 32 - off; i++) { 1807 if ((v & (0x01 << i)) == 0) 1808 break; 1809 } 1810 if (!ii) 1811 printf(" %u", ss + off); 1812 ii += i; 1813 v >>= i; off += i; 1814 } 1815 return ii; 1816 } 1817 1818 /* struct icmp6_nodeinfo *ni: ni->qtype must be SUPTYPES */ 1819 void 1820 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 1821 { 1822 size_t clen; 1823 u_int32_t v; 1824 const u_char *cp, *end; 1825 u_int16_t cur; 1826 struct cbit { 1827 u_int16_t words; /*32bit count*/ 1828 u_int16_t skip; 1829 } cbit; 1830 #define MAXQTYPES (1 << 16) 1831 size_t off; 1832 int b; 1833 1834 cp = (u_char *)(ni + 1); 1835 end = ((u_char *)ni) + nilen; 1836 cur = 0; 1837 b = 0; 1838 1839 printf("NodeInfo Supported Qtypes"); 1840 if (options & F_VERBOSE) { 1841 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 1842 printf(", compressed bitmap"); 1843 else 1844 printf(", raw bitmap"); 1845 } 1846 1847 while (cp < end) { 1848 clen = (size_t)(end - cp); 1849 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 1850 if (clen == 0 || clen > MAXQTYPES / 8 || 1851 clen % sizeof(v)) { 1852 printf("???"); 1853 return; 1854 } 1855 } else { 1856 if (clen < sizeof(cbit) || clen % sizeof(v)) 1857 return; 1858 memcpy(&cbit, cp, sizeof(cbit)); 1859 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 1860 clen) 1861 return; 1862 cp += sizeof(cbit); 1863 clen = ntohs(cbit.words) * sizeof(v); 1864 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 1865 MAXQTYPES) 1866 return; 1867 } 1868 1869 for (off = 0; off < clen; off += sizeof(v)) { 1870 memcpy(&v, cp + off, sizeof(v)); 1871 v = (u_int32_t)ntohl(v); 1872 b = pr_bitrange(v, (int)(cur + off * 8), b); 1873 } 1874 /* flush the remaining bits */ 1875 b = pr_bitrange(0, (int)(cur + off * 8), b); 1876 1877 cp += clen; 1878 cur += clen * 8; 1879 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 1880 cur += ntohs(cbit.skip) * 32; 1881 } 1882 } 1883 1884 /* struct icmp6_nodeinfo *ni: ni->qtype must be NODEADDR */ 1885 void 1886 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 1887 { 1888 u_char *cp = (u_char *)(ni + 1); 1889 char ntop_buf[INET6_ADDRSTRLEN]; 1890 int withttl = 0; 1891 1892 nilen -= sizeof(struct icmp6_nodeinfo); 1893 1894 if (options & F_VERBOSE) { 1895 switch (ni->ni_code) { 1896 case ICMP6_NI_REFUSED: 1897 printf("refused"); 1898 break; 1899 case ICMP6_NI_UNKNOWN: 1900 printf("unknown qtype"); 1901 break; 1902 } 1903 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 1904 printf(" truncated"); 1905 } 1906 putchar('\n'); 1907 if (nilen <= 0) 1908 printf(" no address\n"); 1909 1910 /* 1911 * In icmp-name-lookups 05 and later, TTL of each returned address 1912 * is contained in the resposne. We try to detect the version 1913 * by the length of the data, but note that the detection algorithm 1914 * is incomplete. We assume the latest draft by default. 1915 */ 1916 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 1917 withttl = 1; 1918 while (nilen > 0) { 1919 u_int32_t ttl = 0; 1920 1921 if (withttl) { 1922 /* XXX: alignment? */ 1923 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp); 1924 cp += sizeof(u_int32_t); 1925 nilen -= sizeof(u_int32_t); 1926 } 1927 1928 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 1929 NULL) 1930 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 1931 printf(" %s", ntop_buf); 1932 if (withttl) { 1933 if (ttl == 0xffffffff) { 1934 /* 1935 * XXX: can this convention be applied to all 1936 * type of TTL (i.e. non-ND TTL)? 1937 */ 1938 printf("(TTL=infty)"); 1939 } 1940 else 1941 printf("(TTL=%u)", ttl); 1942 } 1943 putchar('\n'); 1944 1945 nilen -= sizeof(struct in6_addr); 1946 cp += sizeof(struct in6_addr); 1947 } 1948 } 1949 1950 int 1951 get_hoplim(struct msghdr *mhdr) 1952 { 1953 struct cmsghdr *cm; 1954 1955 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1956 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1957 if (cm->cmsg_len == 0) 1958 return(-1); 1959 1960 if (cm->cmsg_level == IPPROTO_IPV6 && 1961 cm->cmsg_type == IPV6_HOPLIMIT && 1962 cm->cmsg_len == CMSG_LEN(sizeof(int))) 1963 return(*(int *)CMSG_DATA(cm)); 1964 } 1965 1966 return(-1); 1967 } 1968 1969 struct in6_pktinfo * 1970 get_rcvpktinfo(struct msghdr *mhdr) 1971 { 1972 struct cmsghdr *cm; 1973 1974 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1975 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1976 if (cm->cmsg_len == 0) 1977 return(NULL); 1978 1979 if (cm->cmsg_level == IPPROTO_IPV6 && 1980 cm->cmsg_type == IPV6_PKTINFO && 1981 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) 1982 return((struct in6_pktinfo *)CMSG_DATA(cm)); 1983 } 1984 1985 return(NULL); 1986 } 1987 1988 #ifdef IPV6_RECVPATHMTU 1989 int 1990 get_pathmtu(struct msghdr *mhdr) 1991 { 1992 struct cmsghdr *cm; 1993 struct ip6_mtuinfo *mtuctl = NULL; 1994 1995 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1996 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1997 if (cm->cmsg_len == 0) 1998 return(0); 1999 2000 if (cm->cmsg_level == IPPROTO_IPV6 && 2001 cm->cmsg_type == IPV6_PATHMTU && 2002 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2003 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm); 2004 2005 /* 2006 * If the notified destination is different from 2007 * the one we are pinging, just ignore the info. 2008 * We check the scope ID only when both notified value 2009 * and our own value have non-0 values, because we may 2010 * have used the default scope zone ID for sending, 2011 * in which case the scope ID value is 0. 2012 */ 2013 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr, 2014 &dst.sin6_addr) || 2015 (mtuctl->ip6m_addr.sin6_scope_id && 2016 dst.sin6_scope_id && 2017 mtuctl->ip6m_addr.sin6_scope_id != 2018 dst.sin6_scope_id)) { 2019 if ((options & F_VERBOSE) != 0) { 2020 printf("path MTU for %s is notified. " 2021 "(ignored)\n", 2022 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr, 2023 sizeof(mtuctl->ip6m_addr))); 2024 } 2025 return(0); 2026 } 2027 2028 /* 2029 * Ignore an invalid MTU. XXX: can we just believe 2030 * the kernel check? 2031 */ 2032 if (mtuctl->ip6m_mtu < IPV6_MMTU) 2033 return(0); 2034 2035 /* notification for our destination. return the MTU. */ 2036 return((int)mtuctl->ip6m_mtu); 2037 } 2038 } 2039 return(0); 2040 } 2041 #endif 2042 2043 #ifdef IPV6_USE_MTU 2044 void 2045 set_pathmtu(int mtu) 2046 { 2047 static int firsttime = 1; 2048 struct cmsghdr *cm; 2049 2050 if (firsttime) { 2051 int oldlen = smsghdr.msg_controllen; 2052 char *oldbuf = smsghdr.msg_control; 2053 2054 /* XXX: We need to enlarge control message buffer */ 2055 firsttime = 0; /* prevent further enlargement */ 2056 2057 smsghdr.msg_controllen = oldlen + CMSG_SPACE(sizeof(int)); 2058 if ((smsghdr.msg_control = 2059 (char *)malloc(smsghdr.msg_controllen)) == NULL) 2060 err(1, "set_pathmtu: malloc"); 2061 cm = (struct cmsghdr *)CMSG_FIRSTHDR(&smsghdr); 2062 cm->cmsg_len = CMSG_LEN(sizeof(int)); 2063 cm->cmsg_level = IPPROTO_IPV6; 2064 cm->cmsg_type = IPV6_USE_MTU; 2065 2066 cm = (struct cmsghdr *)CMSG_NXTHDR(&smsghdr, cm); 2067 if (oldlen) 2068 memcpy((void *)cm, (void *)oldbuf, oldlen); 2069 2070 free(oldbuf); 2071 } 2072 2073 /* 2074 * look for a cmsgptr that points MTU structure. 2075 * XXX: this procedure seems redundant at this moment, but we'd better 2076 * keep the code generic enough for future extensions. 2077 */ 2078 for (cm = CMSG_FIRSTHDR(&smsghdr); cm; 2079 cm = (struct cmsghdr *)CMSG_NXTHDR(&smsghdr, cm)) { 2080 if (cm->cmsg_len == 0) /* XXX: paranoid check */ 2081 errx(1, "set_pathmtu: internal error"); 2082 2083 if (cm->cmsg_level == IPPROTO_IPV6 && 2084 cm->cmsg_type == IPV6_USE_MTU && 2085 cm->cmsg_len == CMSG_LEN(sizeof(int))) 2086 break; 2087 } 2088 2089 if (cm == NULL) 2090 errx(1, "set_pathmtu: internal error: no space for path MTU"); 2091 2092 *(int *)CMSG_DATA(cm) = mtu; 2093 } 2094 #endif 2095 2096 /* 2097 * tvsub -- 2098 * Subtract 2 timeval structs: out = out - in. Out is assumed to 2099 * be >= in. 2100 */ 2101 void 2102 tvsub(struct timeval *out, struct timeval *in) 2103 { 2104 if ((out->tv_usec -= in->tv_usec) < 0) { 2105 --out->tv_sec; 2106 out->tv_usec += 1000000; 2107 } 2108 out->tv_sec -= in->tv_sec; 2109 } 2110 2111 /* 2112 * onint -- 2113 * SIGINT handler. 2114 */ 2115 /* ARGSUSED */ 2116 void 2117 onint(int sig __unused) 2118 { 2119 signal(SIGINT, SIG_IGN); 2120 signal(SIGALRM, SIG_IGN); 2121 2122 summary(); 2123 2124 exit(nreceived == 0); 2125 } 2126 2127 /* 2128 * summary -- 2129 * Print out statistics. 2130 */ 2131 void 2132 summary(void) 2133 { 2134 2135 printf("\n--- %s ping6 statistics ---\n", hostname); 2136 printf("%ld packets transmitted, ", ntransmitted); 2137 printf("%ld packets received, ", nreceived); 2138 if (nrepeats) 2139 printf("+%ld duplicates, ", nrepeats); 2140 if (ntransmitted) { 2141 if (nreceived > ntransmitted) 2142 printf("-- somebody's printing up packets!"); 2143 else 2144 printf("%d%% packet loss", 2145 (int) (((ntransmitted - nreceived) * 100) / 2146 ntransmitted)); 2147 } 2148 putchar('\n'); 2149 if (nreceived && timing) { 2150 /* Only display average to microseconds */ 2151 double num = nreceived + nrepeats; 2152 double avg = tsum / num; 2153 double dev = sqrt(tsumsq / num - avg * avg); 2154 printf( 2155 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2156 tmin, avg, tmax, dev); 2157 fflush(stdout); 2158 } 2159 fflush(stdout); 2160 } 2161 2162 /*subject type*/ 2163 static const char *niqcode[] = { 2164 "IPv6 address", 2165 "DNS label", /*or empty*/ 2166 "IPv4 address", 2167 }; 2168 2169 /*result code*/ 2170 static const char *nircode[] = { 2171 "Success", "Refused", "Unknown", 2172 }; 2173 2174 2175 /* 2176 * pr_icmph -- 2177 * Print a descriptive string about an ICMP header. 2178 */ 2179 void 2180 pr_icmph(struct icmp6_hdr *icp, u_char *end) 2181 { 2182 char ntop_buf[INET6_ADDRSTRLEN]; 2183 struct nd_redirect *red; 2184 struct icmp6_nodeinfo *ni; 2185 char dnsname[MAXDNAME + 1]; 2186 const u_char *cp; 2187 size_t l; 2188 2189 switch (icp->icmp6_type) { 2190 case ICMP6_DST_UNREACH: 2191 switch (icp->icmp6_code) { 2192 case ICMP6_DST_UNREACH_NOROUTE: 2193 printf("No Route to Destination\n"); 2194 break; 2195 case ICMP6_DST_UNREACH_ADMIN: 2196 printf("Destination Administratively Unreachable\n"); 2197 break; 2198 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2199 printf("Destination Unreachable Beyond Scope\n"); 2200 break; 2201 case ICMP6_DST_UNREACH_ADDR: 2202 printf("Destination Host Unreachable\n"); 2203 break; 2204 case ICMP6_DST_UNREACH_NOPORT: 2205 printf("Destination Port Unreachable\n"); 2206 break; 2207 default: 2208 printf("Destination Unreachable, Bad Code: %d\n", 2209 icp->icmp6_code); 2210 break; 2211 } 2212 /* Print returned IP header information */ 2213 pr_retip((struct ip6_hdr *)(icp + 1), end); 2214 break; 2215 case ICMP6_PACKET_TOO_BIG: 2216 printf("Packet too big mtu = %d\n", 2217 (int)ntohl(icp->icmp6_mtu)); 2218 pr_retip((struct ip6_hdr *)(icp + 1), end); 2219 break; 2220 case ICMP6_TIME_EXCEEDED: 2221 switch (icp->icmp6_code) { 2222 case ICMP6_TIME_EXCEED_TRANSIT: 2223 printf("Time to live exceeded\n"); 2224 break; 2225 case ICMP6_TIME_EXCEED_REASSEMBLY: 2226 printf("Frag reassembly time exceeded\n"); 2227 break; 2228 default: 2229 printf("Time exceeded, Bad Code: %d\n", 2230 icp->icmp6_code); 2231 break; 2232 } 2233 pr_retip((struct ip6_hdr *)(icp + 1), end); 2234 break; 2235 case ICMP6_PARAM_PROB: 2236 printf("Parameter problem: "); 2237 switch (icp->icmp6_code) { 2238 case ICMP6_PARAMPROB_HEADER: 2239 printf("Erroneous Header "); 2240 break; 2241 case ICMP6_PARAMPROB_NEXTHEADER: 2242 printf("Unknown Nextheader "); 2243 break; 2244 case ICMP6_PARAMPROB_OPTION: 2245 printf("Unrecognized Option "); 2246 break; 2247 default: 2248 printf("Bad code(%d) ", icp->icmp6_code); 2249 break; 2250 } 2251 printf("pointer = 0x%02x\n", (u_int32_t)ntohl(icp->icmp6_pptr)); 2252 pr_retip((struct ip6_hdr *)(icp + 1), end); 2253 break; 2254 case ICMP6_ECHO_REQUEST: 2255 printf("Echo Request"); 2256 /* XXX ID + Seq + Data */ 2257 break; 2258 case ICMP6_ECHO_REPLY: 2259 printf("Echo Reply"); 2260 /* XXX ID + Seq + Data */ 2261 break; 2262 case ICMP6_MEMBERSHIP_QUERY: 2263 printf("Listener Query"); 2264 break; 2265 case ICMP6_MEMBERSHIP_REPORT: 2266 printf("Listener Report"); 2267 break; 2268 case ICMP6_MEMBERSHIP_REDUCTION: 2269 printf("Listener Done"); 2270 break; 2271 case ND_ROUTER_SOLICIT: 2272 printf("Router Solicitation"); 2273 break; 2274 case ND_ROUTER_ADVERT: 2275 printf("Router Advertisement"); 2276 break; 2277 case ND_NEIGHBOR_SOLICIT: 2278 printf("Neighbor Solicitation"); 2279 break; 2280 case ND_NEIGHBOR_ADVERT: 2281 printf("Neighbor Advertisement"); 2282 break; 2283 case ND_REDIRECT: 2284 red = (struct nd_redirect *)icp; 2285 printf("Redirect\n"); 2286 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2287 sizeof(ntop_buf))) 2288 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2289 printf("Destination: %s", ntop_buf); 2290 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2291 sizeof(ntop_buf))) 2292 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2293 printf(" New Target: %s", ntop_buf); 2294 break; 2295 case ICMP6_NI_QUERY: 2296 printf("Node Information Query"); 2297 /* XXX ID + Seq + Data */ 2298 ni = (struct icmp6_nodeinfo *)icp; 2299 l = end - (u_char *)(ni + 1); 2300 printf(", "); 2301 switch (ntohs(ni->ni_qtype)) { 2302 case NI_QTYPE_NOOP: 2303 printf("NOOP"); 2304 break; 2305 case NI_QTYPE_SUPTYPES: 2306 printf("Supported qtypes"); 2307 break; 2308 case NI_QTYPE_FQDN: 2309 printf("DNS name"); 2310 break; 2311 case NI_QTYPE_NODEADDR: 2312 printf("nodeaddr"); 2313 break; 2314 case NI_QTYPE_IPV4ADDR: 2315 printf("IPv4 nodeaddr"); 2316 break; 2317 default: 2318 printf("unknown qtype"); 2319 break; 2320 } 2321 if (options & F_VERBOSE) { 2322 switch (ni->ni_code) { 2323 case ICMP6_NI_SUBJ_IPV6: 2324 if (l == sizeof(struct in6_addr) && 2325 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2326 sizeof(ntop_buf)) != NULL) { 2327 printf(", subject=%s(%s)", 2328 niqcode[ni->ni_code], ntop_buf); 2329 } else { 2330 #if 1 2331 /* backward compat to -W */ 2332 printf(", oldfqdn"); 2333 #else 2334 printf(", invalid"); 2335 #endif 2336 } 2337 break; 2338 case ICMP6_NI_SUBJ_FQDN: 2339 if (end == (u_char *)(ni + 1)) { 2340 printf(", no subject"); 2341 break; 2342 } 2343 printf(", subject=%s", niqcode[ni->ni_code]); 2344 cp = (const u_char *)(ni + 1); 2345 if (dnsdecode(&cp, end, NULL, dnsname, 2346 sizeof(dnsname)) != NULL) 2347 printf("(%s)", dnsname); 2348 else 2349 printf("(invalid)"); 2350 break; 2351 case ICMP6_NI_SUBJ_IPV4: 2352 if (l == sizeof(struct in_addr) && 2353 inet_ntop(AF_INET, ni + 1, ntop_buf, 2354 sizeof(ntop_buf)) != NULL) { 2355 printf(", subject=%s(%s)", 2356 niqcode[ni->ni_code], ntop_buf); 2357 } else 2358 printf(", invalid"); 2359 break; 2360 default: 2361 printf(", invalid"); 2362 break; 2363 } 2364 } 2365 break; 2366 case ICMP6_NI_REPLY: 2367 printf("Node Information Reply"); 2368 /* XXX ID + Seq + Data */ 2369 ni = (struct icmp6_nodeinfo *)icp; 2370 printf(", "); 2371 switch (ntohs(ni->ni_qtype)) { 2372 case NI_QTYPE_NOOP: 2373 printf("NOOP"); 2374 break; 2375 case NI_QTYPE_SUPTYPES: 2376 printf("Supported qtypes"); 2377 break; 2378 case NI_QTYPE_FQDN: 2379 printf("DNS name"); 2380 break; 2381 case NI_QTYPE_NODEADDR: 2382 printf("nodeaddr"); 2383 break; 2384 case NI_QTYPE_IPV4ADDR: 2385 printf("IPv4 nodeaddr"); 2386 break; 2387 default: 2388 printf("unknown qtype"); 2389 break; 2390 } 2391 if (options & F_VERBOSE) { 2392 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0])) 2393 printf(", invalid"); 2394 else 2395 printf(", %s", nircode[ni->ni_code]); 2396 } 2397 break; 2398 default: 2399 printf("Bad ICMP type: %d", icp->icmp6_type); 2400 } 2401 } 2402 2403 /* 2404 * pr_iph -- 2405 * Print an IP6 header. 2406 */ 2407 void 2408 pr_iph(struct ip6_hdr *ip6) 2409 { 2410 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2411 u_int8_t tc; 2412 char ntop_buf[INET6_ADDRSTRLEN]; 2413 2414 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2415 tc = (tc >> 4) & 0x0f; 2416 tc |= (ip6->ip6_vfc << 4); 2417 2418 printf("Vr TC Flow Plen Nxt Hlim\n"); 2419 printf(" %1x %02x %05x %04x %02x %02x\n", 2420 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2421 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2422 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2423 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2424 printf("%s->", ntop_buf); 2425 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2426 strncpy(ntop_buf, "?", sizeof(ntop_buf)); 2427 printf("%s\n", ntop_buf); 2428 } 2429 2430 /* 2431 * pr_addr -- 2432 * Return an ascii host address as a dotted quad and optionally with 2433 * a hostname. 2434 */ 2435 const char * 2436 pr_addr(struct sockaddr *addr, int addrlen) 2437 { 2438 static char buf[NI_MAXHOST]; 2439 int flag; 2440 2441 #ifdef NI_WITHSCOPEID 2442 flag = NI_WITHSCOPEID; 2443 #else 2444 flag = 0; 2445 #endif 2446 if ((options & F_HOSTNAME) == 0) 2447 flag |= NI_NUMERICHOST; 2448 2449 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) 2450 return (buf); 2451 else 2452 return "?"; 2453 } 2454 2455 /* 2456 * pr_retip -- 2457 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2458 */ 2459 void 2460 pr_retip(struct ip6_hdr *ip6, u_char *end) 2461 { 2462 u_char *cp = (u_char *)ip6, nh; 2463 int hlen; 2464 2465 if (end - (u_char *)ip6 < (int)sizeof(*ip6)) { 2466 printf("IP6"); 2467 goto trunc; 2468 } 2469 pr_iph(ip6); 2470 hlen = sizeof(*ip6); 2471 2472 nh = ip6->ip6_nxt; 2473 cp += hlen; 2474 while (end - cp >= 8) { 2475 switch (nh) { 2476 case IPPROTO_HOPOPTS: 2477 printf("HBH "); 2478 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2479 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2480 break; 2481 case IPPROTO_DSTOPTS: 2482 printf("DSTOPT "); 2483 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2484 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2485 break; 2486 case IPPROTO_FRAGMENT: 2487 printf("FRAG "); 2488 hlen = sizeof(struct ip6_frag); 2489 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2490 break; 2491 case IPPROTO_ROUTING: 2492 printf("RTHDR "); 2493 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2494 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2495 break; 2496 #ifdef IPSEC 2497 case IPPROTO_AH: 2498 printf("AH "); 2499 hlen = (((struct ah *)cp)->ah_len+2) << 2; 2500 nh = ((struct ah *)cp)->ah_nxt; 2501 break; 2502 #endif 2503 case IPPROTO_ICMPV6: 2504 printf("ICMP6: type = %d, code = %d\n", 2505 *cp, *(cp + 1)); 2506 return; 2507 case IPPROTO_ESP: 2508 printf("ESP\n"); 2509 return; 2510 case IPPROTO_TCP: 2511 printf("TCP: from port %u, to port %u (decimal)\n", 2512 (*cp * 256 + *(cp + 1)), 2513 (*(cp + 2) * 256 + *(cp + 3))); 2514 return; 2515 case IPPROTO_UDP: 2516 printf("UDP: from port %u, to port %u (decimal)\n", 2517 (*cp * 256 + *(cp + 1)), 2518 (*(cp + 2) * 256 + *(cp + 3))); 2519 return; 2520 default: 2521 printf("Unknown Header(%d)\n", nh); 2522 return; 2523 } 2524 2525 if ((cp += hlen) >= end) 2526 goto trunc; 2527 } 2528 if (end - cp < 8) 2529 goto trunc; 2530 2531 putchar('\n'); 2532 return; 2533 2534 trunc: 2535 printf("...\n"); 2536 return; 2537 } 2538 2539 void 2540 fill(char *bp, char *patp) 2541 { 2542 int ii, jj, kk; 2543 int pat[16]; 2544 char *cp; 2545 2546 for (cp = patp; *cp; cp++) 2547 if (!isxdigit(*cp)) 2548 errx(1, "patterns must be specified as hex digits"); 2549 ii = sscanf(patp, 2550 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2551 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2552 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2553 &pat[13], &pat[14], &pat[15]); 2554 2555 /* xxx */ 2556 if (ii > 0) 2557 for (kk = 0; 2558 kk <= MAXDATALEN - (8 + (int)sizeof(struct timeval) + ii); 2559 kk += ii) 2560 for (jj = 0; jj < ii; ++jj) 2561 bp[jj + kk] = pat[jj]; 2562 if (!(options & F_QUIET)) { 2563 printf("PATTERN: 0x"); 2564 for (jj = 0; jj < ii; ++jj) 2565 printf("%02x", bp[jj] & 0xFF); 2566 printf("\n"); 2567 } 2568 } 2569 2570 #ifdef IPSEC 2571 #ifdef IPSEC_POLICY_IPSEC 2572 int 2573 setpolicy(int so __unused, char *policy) 2574 { 2575 char *buf; 2576 2577 if (policy == NULL) 2578 return 0; /* ignore */ 2579 2580 buf = ipsec_set_policy(policy, strlen(policy)); 2581 if (buf == NULL) 2582 errx(1, "%s", ipsec_strerror()); 2583 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2584 ipsec_get_policylen(buf)) < 0) 2585 warnx("Unable to set IPSec policy"); 2586 free(buf); 2587 2588 return 0; 2589 } 2590 #endif 2591 #endif 2592 2593 char * 2594 nigroup(char *name) 2595 { 2596 char *p; 2597 unsigned char *q; 2598 MD5_CTX ctxt; 2599 u_int8_t digest[16]; 2600 u_int8_t c; 2601 size_t l; 2602 char hbuf[NI_MAXHOST]; 2603 struct in6_addr in6; 2604 2605 p = strchr(name, '.'); 2606 if (!p) 2607 p = name + strlen(name); 2608 l = p - name; 2609 if (l > 63 || l > sizeof(hbuf) - 1) 2610 return NULL; /*label too long*/ 2611 strncpy(hbuf, name, l); 2612 hbuf[(int)l] = '\0'; 2613 2614 for (q = name; *q; q++) { 2615 if (isupper(*q)) 2616 *q = tolower(*q); 2617 } 2618 2619 /* generate 8 bytes of pseudo-random value. */ 2620 bzero(&ctxt, sizeof(ctxt)); 2621 MD5Init(&ctxt); 2622 c = l & 0xff; 2623 MD5Update(&ctxt, &c, sizeof(c)); 2624 MD5Update(&ctxt, name, l); 2625 MD5Final(digest, &ctxt); 2626 2627 if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1) 2628 return NULL; /*XXX*/ 2629 bcopy(digest, &in6.s6_addr[12], 4); 2630 2631 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2632 return NULL; 2633 2634 return strdup(hbuf); 2635 } 2636 2637 void 2638 usage(void) 2639 { 2640 fprintf(stderr, 2641 "usage: ping6 [-dfH" 2642 #ifdef IPV6_USE_MIN_MTU 2643 "m" 2644 #endif 2645 "nNqtvwW" 2646 #ifdef IPV6_REACHCONF 2647 "R" 2648 #endif 2649 #ifdef IPSEC 2650 #ifdef IPSEC_POLICY_IPSEC 2651 "] [-P policy" 2652 #else 2653 "AE" 2654 #endif 2655 #endif 2656 "] [-a [aAclsg]] [-b sockbufsiz] [-c count] \n" 2657 "\t[-I interface] [-i wait] [-l preload] [-p pattern] " 2658 "[-S sourceaddr]\n" 2659 "\t[-s packetsize] [-h hoplimit] [hops...] host\n"); 2660 exit(1); 2661 } 2662