1 /* $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */ 35 36 /* 37 * Copyright (c) 1989, 1993 38 * The Regents of the University of California. All rights reserved. 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Mike Muuss. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 #if 0 69 #ifndef lint 70 static const char copyright[] = 71 "@(#) Copyright (c) 1989, 1993\n\ 72 The Regents of the University of California. All rights reserved.\n"; 73 #endif /* not lint */ 74 75 #ifndef lint 76 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 77 #endif /* not lint */ 78 #endif 79 80 #include <sys/cdefs.h> 81 /* 82 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 83 * measure round-trip-delays and packet loss across network paths. 84 * 85 * Author - 86 * Mike Muuss 87 * U. S. Army Ballistic Research Laboratory 88 * December, 1983 89 * 90 * Status - 91 * Public Domain. Distribution Unlimited. 92 * Bugs - 93 * More statistics could always be gathered. 94 * This program has to run SUID to ROOT to access the ICMP socket. 95 */ 96 /* 97 * NOTE: 98 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics 99 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link* 100 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of 101 * network attached to 1 or more interfaces) 102 */ 103 104 #include <sys/param.h> 105 #include <sys/capsicum.h> 106 #include <sys/uio.h> 107 #include <sys/socket.h> 108 109 #include <net/if.h> 110 #include <net/route.h> 111 112 #include <netinet/in.h> 113 #include <netinet/ip6.h> 114 #include <netinet/icmp6.h> 115 #include <arpa/inet.h> 116 #include <arpa/nameser.h> 117 #include <netdb.h> 118 119 #include <capsicum_helpers.h> 120 #include <casper/cap_dns.h> 121 #include <libcasper.h> 122 123 #include <ctype.h> 124 #include <err.h> 125 #include <errno.h> 126 #include <fcntl.h> 127 #include <signal.h> 128 #include <stdio.h> 129 #include <stdlib.h> 130 #include <string.h> 131 #include <sysexits.h> 132 #include <time.h> 133 #include <unistd.h> 134 135 #ifdef IPSEC 136 #include <netipsec/ah.h> 137 #include <netipsec/ipsec.h> 138 #endif 139 140 #include <md5.h> 141 142 #include "main.h" 143 #include "ping6.h" 144 145 struct tv32 { 146 u_int32_t tv32_sec; 147 u_int32_t tv32_nsec; 148 }; 149 150 #define MAXPACKETLEN 131072 151 #define IP6LEN 40 152 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 153 #define ICMP6ECHOTMLEN sizeof(struct tv32) 154 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 155 # define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */ 156 /* FQDN case, 64 bits of nonce + 32 bits ttl */ 157 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 158 #define EXTRA 256 /* for AH and various other headers. weird. */ 159 #define DEFDATALEN ICMP6ECHOTMLEN 160 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 161 #define NROUTES 9 /* number of record route slots */ 162 #define MAXWAIT 10000 /* max ms to wait for response */ 163 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 164 165 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 166 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 167 #define SET(bit) (A(bit) |= B(bit)) 168 #define CLR(bit) (A(bit) &= (~B(bit))) 169 #define TST(bit) (A(bit) & B(bit)) 170 171 #define F_FLOOD 0x0001 172 #define F_INTERVAL 0x0002 173 #define F_PINGFILLED 0x0008 174 #define F_QUIET 0x0010 175 #define F_RROUTE 0x0020 176 #define F_SO_DEBUG 0x0040 177 #define F_VERBOSE 0x0100 178 #ifdef IPSEC 179 #ifdef IPSEC_POLICY_IPSEC 180 #define F_POLICY 0x0400 181 #else 182 #define F_AUTHHDR 0x0200 183 #define F_ENCRYPT 0x0400 184 #endif /*IPSEC_POLICY_IPSEC*/ 185 #endif /*IPSEC*/ 186 #define F_NODEADDR 0x0800 187 #define F_FQDN 0x1000 188 #define F_INTERFACE 0x2000 189 #define F_SRCADDR 0x4000 190 #define F_FQDNOLD 0x20000 191 #define F_NIGROUP 0x40000 192 #define F_SUPTYPES 0x80000 193 #define F_NOMINMTU 0x100000 194 #define F_ONCE 0x200000 195 #define F_AUDIBLE 0x400000 196 #define F_MISSED 0x800000 197 #define F_DONTFRAG 0x1000000 198 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 199 #define F_WAITTIME 0x2000000 200 #define F_DOT 0x4000000 201 202 #define IN6LEN sizeof(struct in6_addr) 203 #define SA6LEN sizeof(struct sockaddr_in6) 204 #define DUMMY_PORT 10101 205 206 #define SIN6(s) ((struct sockaddr_in6 *)(s)) 207 208 /* 209 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 210 * number of received sequence numbers we can keep track of. Change 128 211 * to 8192 for complete accuracy... 212 */ 213 #define MAX_DUP_CHK (8 * 8192) 214 static int mx_dup_ck = MAX_DUP_CHK; 215 static char rcvd_tbl[MAX_DUP_CHK / 8]; 216 217 static struct sockaddr_in6 dst; /* who to ping6 */ 218 static struct sockaddr_in6 src; /* src addr of this packet */ 219 static socklen_t srclen; 220 static size_t datalen = DEFDATALEN; 221 static int ssend; /* send socket file descriptor */ 222 static int srecv; /* receive socket file descriptor */ 223 static u_char outpack[MAXPACKETLEN]; 224 static char BSPACE = '\b'; /* characters written for flood */ 225 static char BBELL = '\a'; /* characters written for AUDIBLE */ 226 static const char *DOT = "."; 227 static size_t DOTlen = 1; 228 static size_t DOTidx = 0; 229 static int ident; /* process id to identify our packets */ 230 static u_int8_t nonce[8]; /* nonce field for node information */ 231 static int hoplimit = -1; /* hoplimit */ 232 static int tclass = -1; /* traffic class */ 233 static int pcp = -2; /* vlan priority code point */ 234 static u_char *packet = NULL; 235 static cap_channel_t *capdns; 236 237 /* counters */ 238 static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 239 static long npackets; /* max packets to transmit */ 240 static long ntransmitfailures; /* number of transmit failures */ 241 static int interval = 1000; /* interval between packets in ms */ 242 static int waittime = MAXWAIT; /* timeout for each packet */ 243 244 /* for node addresses */ 245 static u_short naflags; 246 247 /* for ancillary data(advanced API) */ 248 static struct msghdr smsghdr; 249 static struct iovec smsgiov; 250 static char *scmsg = 0; 251 252 static cap_channel_t *capdns_setup(void); 253 static void fill(char *, char *); 254 static int get_hoplim(struct msghdr *); 255 static int get_pathmtu(struct msghdr *); 256 static struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); 257 static size_t pingerlen(void); 258 static int pinger(void); 259 static const char *pr_addr(struct sockaddr *, int); 260 static void pr_icmph(struct icmp6_hdr *, u_char *); 261 static void pr_iph(struct ip6_hdr *); 262 static void pr_suptypes(struct icmp6_nodeinfo *, size_t); 263 static void pr_nodeaddr(struct icmp6_nodeinfo *, int); 264 static int myechoreply(const struct icmp6_hdr *); 265 static int mynireply(const struct icmp6_nodeinfo *); 266 static const char *dnsdecode(const u_char *, const u_char *, const u_char *, 267 char *, size_t); 268 static void pr_pack(u_char *, int, struct msghdr *); 269 static void pr_exthdrs(struct msghdr *); 270 static void pr_ip6opt(void *, size_t); 271 static void pr_rthdr(void *, size_t); 272 static int pr_bitrange(u_int32_t, int, int); 273 static void pr_retip(struct ip6_hdr *, u_char *); 274 #ifdef IPSEC 275 #ifdef IPSEC_POLICY_IPSEC 276 static int setpolicy(int, char *); 277 #endif 278 #endif 279 static char *nigroup(char *, int); 280 281 int 282 ping6(int argc, char *argv[]) 283 { 284 struct timespec last, intvl; 285 struct sockaddr_in6 from, *sin6; 286 struct addrinfo hints, *res; 287 struct sigaction si_sa; 288 int cc, i; 289 int almost_done, ch, hold, packlen, preload, optval, error; 290 int nig_oldmcprefix = -1; 291 u_char *datap; 292 char *e, *target, *ifname = NULL, *gateway = NULL; 293 int ip6optlen = 0; 294 struct cmsghdr *scmsgp = NULL; 295 /* For control (ancillary) data received from recvmsg() */ 296 u_char cm[CONTROLLEN]; 297 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 298 u_long lsockbufsize; 299 int sockbufsize = 0; 300 #endif 301 int usepktinfo = 0; 302 struct in6_pktinfo pktinfo; 303 char *cmsg_pktinfo = NULL; 304 struct ip6_rthdr *rthdr = NULL; 305 #ifdef IPSEC_POLICY_IPSEC 306 char *policy_in = NULL; 307 char *policy_out = NULL; 308 #endif 309 double t; 310 u_long alarmtimeout; 311 size_t rthlen; 312 #ifdef IPV6_USE_MIN_MTU 313 int mflag = 0; 314 #endif 315 cap_rights_t rights_srecv; 316 cap_rights_t rights_ssend; 317 cap_rights_t rights_stdin; 318 319 /* just to be sure */ 320 memset(&smsghdr, 0, sizeof(smsghdr)); 321 memset(&smsgiov, 0, sizeof(smsgiov)); 322 memset(&pktinfo, 0, sizeof(pktinfo)); 323 324 intvl.tv_sec = interval / 1000; 325 intvl.tv_nsec = interval % 1000 * 1000000; 326 327 alarmtimeout = preload = 0; 328 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 329 capdns = capdns_setup(); 330 331 while ((ch = getopt(argc, argv, PING6OPTS)) != -1) { 332 switch (ch) { 333 case '.': 334 options |= F_DOT; 335 if (optarg != NULL) { 336 DOT = optarg; 337 DOTlen = strlen(optarg); 338 } 339 break; 340 case '6': 341 /* This option is processed in main(). */ 342 break; 343 case 'k': 344 { 345 char *cp; 346 347 options &= ~F_NOUSERDATA; 348 options |= F_NODEADDR; 349 for (cp = optarg; *cp != '\0'; cp++) { 350 switch (*cp) { 351 case 'a': 352 naflags |= NI_NODEADDR_FLAG_ALL; 353 break; 354 case 'c': 355 case 'C': 356 naflags |= NI_NODEADDR_FLAG_COMPAT; 357 break; 358 case 'l': 359 case 'L': 360 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 361 break; 362 case 's': 363 case 'S': 364 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 365 break; 366 case 'g': 367 case 'G': 368 naflags |= NI_NODEADDR_FLAG_GLOBAL; 369 break; 370 case 'A': /* experimental. not in the spec */ 371 #ifdef NI_NODEADDR_FLAG_ANYCAST 372 naflags |= NI_NODEADDR_FLAG_ANYCAST; 373 break; 374 #else 375 errx(1, 376 "-a A is not supported on the platform"); 377 /*NOTREACHED*/ 378 #endif 379 default: 380 usage(); 381 /*NOTREACHED*/ 382 } 383 } 384 break; 385 } 386 case 'b': 387 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 388 errno = 0; 389 e = NULL; 390 lsockbufsize = strtoul(optarg, &e, 10); 391 sockbufsize = (int)lsockbufsize; 392 if (errno || !*optarg || *e || 393 lsockbufsize > INT_MAX) 394 errx(1, "invalid socket buffer size"); 395 #else 396 errx(1, 397 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 398 #endif 399 break; 400 case 'C': /* vlan priority code point */ 401 pcp = strtol(optarg, &e, 10); 402 if (*optarg == '\0' || *e != '\0') 403 errx(1, "illegal vlan pcp %s", optarg); 404 if (7 < pcp || pcp < -1) 405 errx(1, "illegal vlan pcp -- %s", optarg); 406 break; 407 case 'c': 408 npackets = strtol(optarg, &e, 10); 409 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 410 errx(1, 411 "illegal number of packets -- %s", optarg); 412 break; 413 case 'D': 414 options |= F_DONTFRAG; 415 break; 416 case 'd': 417 options |= F_SO_DEBUG; 418 break; 419 case 'f': 420 if (getuid()) { 421 errno = EPERM; 422 errx(1, "Must be superuser to flood ping"); 423 } 424 options |= F_FLOOD; 425 options |= F_DOT; 426 setbuf(stdout, (char *)NULL); 427 break; 428 case 'e': 429 gateway = optarg; 430 break; 431 case 'H': 432 options |= F_HOSTNAME; 433 break; 434 case 'm': /* hoplimit */ 435 hoplimit = strtol(optarg, &e, 10); 436 if (*optarg == '\0' || *e != '\0') 437 errx(1, "illegal hoplimit %s", optarg); 438 if (255 < hoplimit || hoplimit < -1) 439 errx(1, 440 "illegal hoplimit -- %s", optarg); 441 break; 442 case 'I': 443 ifname = optarg; 444 options |= F_INTERFACE; 445 #ifndef USE_SIN6_SCOPE_ID 446 usepktinfo++; 447 #endif 448 break; 449 case 'i': /* wait between sending packets */ 450 t = strtod(optarg, &e); 451 if (*optarg == '\0' || *e != '\0') 452 errx(1, "illegal timing interval %s", optarg); 453 if (t < 1 && getuid()) { 454 errx(1, "%s: only root may use interval < 1s", 455 strerror(EPERM)); 456 } 457 intvl.tv_sec = (time_t)t; 458 intvl.tv_nsec = 459 (long)((t - intvl.tv_sec) * 1000000000); 460 if (intvl.tv_sec < 0) 461 errx(1, "illegal timing interval %s", optarg); 462 /* less than 1/hz does not make sense */ 463 if (intvl.tv_sec == 0 && intvl.tv_nsec < 1000) { 464 warnx("too small interval, raised to .000001"); 465 intvl.tv_nsec = 1000; 466 } 467 options |= F_INTERVAL; 468 break; 469 case 'l': 470 if (getuid()) { 471 errno = EPERM; 472 errx(1, "Must be superuser to preload"); 473 } 474 preload = strtol(optarg, &e, 10); 475 if (preload < 0 || *optarg == '\0' || *e != '\0') 476 errx(1, "illegal preload value -- %s", optarg); 477 break; 478 case 'u': 479 #ifdef IPV6_USE_MIN_MTU 480 mflag++; 481 break; 482 #else 483 errx(1, "-%c is not supported on this platform", ch); 484 /*NOTREACHED*/ 485 #endif 486 case 'n': 487 options &= ~F_HOSTNAME; 488 break; 489 case 'N': 490 options |= F_NIGROUP; 491 nig_oldmcprefix++; 492 break; 493 case 'o': 494 options |= F_ONCE; 495 break; 496 case 'p': /* fill buffer with user pattern */ 497 options |= F_PINGFILLED; 498 fill((char *)datap, optarg); 499 break; 500 case 'q': 501 options |= F_QUIET; 502 break; 503 case 'a': 504 options |= F_AUDIBLE; 505 break; 506 case 'A': 507 options |= F_MISSED; 508 break; 509 case 'S': 510 memset(&hints, 0, sizeof(struct addrinfo)); 511 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ 512 hints.ai_family = AF_INET6; 513 hints.ai_socktype = SOCK_RAW; 514 hints.ai_protocol = IPPROTO_ICMPV6; 515 516 error = cap_getaddrinfo(capdns, optarg, NULL, &hints, &res); 517 if (error) { 518 errx(1, "invalid source address: %s", 519 gai_strerror(error)); 520 } 521 /* 522 * res->ai_family must be AF_INET6 and res->ai_addrlen 523 * must be sizeof(src). 524 */ 525 memcpy(&src, res->ai_addr, res->ai_addrlen); 526 srclen = res->ai_addrlen; 527 freeaddrinfo(res); 528 options |= F_SRCADDR; 529 break; 530 case 's': /* size of packet to send */ 531 datalen = strtol(optarg, &e, 10); 532 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 533 errx(1, "illegal datalen value -- %s", optarg); 534 if (datalen > MAXDATALEN) { 535 errx(1, 536 "datalen value too large, maximum is %d", 537 MAXDATALEN); 538 } 539 break; 540 case 'O': 541 options &= ~F_NOUSERDATA; 542 options |= F_SUPTYPES; 543 break; 544 case 'v': 545 options |= F_VERBOSE; 546 break; 547 case 'y': 548 options &= ~F_NOUSERDATA; 549 options |= F_FQDN; 550 break; 551 case 'Y': 552 options &= ~F_NOUSERDATA; 553 options |= F_FQDNOLD; 554 break; 555 case 'W': 556 t = strtod(optarg, &e); 557 if (*e || e == optarg || t > (double)INT_MAX) 558 errx(EX_USAGE, "invalid timing interval: `%s'", 559 optarg); 560 options |= F_WAITTIME; 561 waittime = (int)t; 562 break; 563 case 't': 564 alarmtimeout = strtoul(optarg, &e, 0); 565 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 566 errx(EX_USAGE, "invalid timeout: `%s'", 567 optarg); 568 if (alarmtimeout > MAXALARM) 569 errx(EX_USAGE, "invalid timeout: `%s' > %d", 570 optarg, MAXALARM); 571 { 572 struct itimerval itv; 573 574 timerclear(&itv.it_interval); 575 timerclear(&itv.it_value); 576 itv.it_value.tv_sec = (time_t)alarmtimeout; 577 if (setitimer(ITIMER_REAL, &itv, NULL) != 0) 578 err(1, "setitimer"); 579 } 580 break; 581 case 'z': /* traffic class */ 582 tclass = strtol(optarg, &e, 10); 583 if (*optarg == '\0' || *e != '\0') 584 errx(1, "illegal traffic class %s", optarg); 585 if (255 < tclass || tclass < -1) 586 errx(1, 587 "illegal traffic class -- %s", optarg); 588 break; 589 #ifdef IPSEC 590 #ifdef IPSEC_POLICY_IPSEC 591 case 'P': 592 options |= F_POLICY; 593 if (!strncmp("in", optarg, 2)) { 594 if ((policy_in = strdup(optarg)) == NULL) 595 errx(1, "strdup"); 596 } else if (!strncmp("out", optarg, 3)) { 597 if ((policy_out = strdup(optarg)) == NULL) 598 errx(1, "strdup"); 599 } else 600 errx(1, "invalid security policy"); 601 break; 602 #else 603 case 'Z': 604 options |= F_AUTHHDR; 605 break; 606 case 'E': 607 options |= F_ENCRYPT; 608 break; 609 #endif /*IPSEC_POLICY_IPSEC*/ 610 #endif /*IPSEC*/ 611 default: 612 usage(); 613 /*NOTREACHED*/ 614 } 615 } 616 617 argc -= optind; 618 argv += optind; 619 620 if (argc < 1) { 621 usage(); 622 /*NOTREACHED*/ 623 } 624 625 if (argc > 1) { 626 #ifdef IPV6_RECVRTHDR /* 2292bis */ 627 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 628 argc - 1)); 629 #else /* RFC2292 */ 630 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 631 #endif 632 if (rthlen == 0) { 633 errx(1, "too many intermediate hops"); 634 /*NOTREACHED*/ 635 } 636 ip6optlen += rthlen; 637 } 638 639 if (options & F_NIGROUP) { 640 target = nigroup(argv[argc - 1], nig_oldmcprefix); 641 if (target == NULL) { 642 usage(); 643 /*NOTREACHED*/ 644 } 645 } else 646 target = argv[argc - 1]; 647 648 /* cap_getaddrinfo */ 649 memset(&hints, 0, sizeof(struct addrinfo)); 650 hints.ai_flags = AI_CANONNAME; 651 hints.ai_family = AF_INET6; 652 hints.ai_socktype = SOCK_RAW; 653 hints.ai_protocol = IPPROTO_ICMPV6; 654 655 error = cap_getaddrinfo(capdns, target, NULL, &hints, &res); 656 if (error) 657 errx(1, "%s", gai_strerror(error)); 658 if (res->ai_canonname) 659 hostname = strdup(res->ai_canonname); 660 else 661 hostname = target; 662 663 if (!res->ai_addr) 664 errx(1, "cap_getaddrinfo failed"); 665 666 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 667 668 if ((ssend = socket(res->ai_family, res->ai_socktype, 669 res->ai_protocol)) < 0) 670 err(1, "socket ssend"); 671 if ((srecv = socket(res->ai_family, res->ai_socktype, 672 res->ai_protocol)) < 0) 673 err(1, "socket srecv"); 674 freeaddrinfo(res); 675 676 /* set the source address if specified. */ 677 if ((options & F_SRCADDR) != 0) { 678 /* properly fill sin6_scope_id */ 679 if (IN6_IS_ADDR_LINKLOCAL(&src.sin6_addr) && ( 680 IN6_IS_ADDR_LINKLOCAL(&dst.sin6_addr) || 681 IN6_IS_ADDR_MC_LINKLOCAL(&dst.sin6_addr) || 682 IN6_IS_ADDR_MC_NODELOCAL(&dst.sin6_addr))) { 683 if (src.sin6_scope_id == 0) 684 src.sin6_scope_id = dst.sin6_scope_id; 685 if (dst.sin6_scope_id == 0) 686 dst.sin6_scope_id = src.sin6_scope_id; 687 } 688 if (bind(ssend, (struct sockaddr *)&src, srclen) != 0) 689 err(1, "bind"); 690 } 691 /* set the gateway (next hop) if specified */ 692 if (gateway) { 693 memset(&hints, 0, sizeof(hints)); 694 hints.ai_family = AF_INET6; 695 hints.ai_socktype = SOCK_RAW; 696 hints.ai_protocol = IPPROTO_ICMPV6; 697 698 error = cap_getaddrinfo(capdns, gateway, NULL, &hints, &res); 699 if (error) { 700 errx(1, "cap_getaddrinfo for the gateway %s: %s", 701 gateway, gai_strerror(error)); 702 } 703 if (res->ai_next && (options & F_VERBOSE)) 704 warnx("gateway resolves to multiple addresses"); 705 706 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_NEXTHOP, 707 res->ai_addr, res->ai_addrlen)) { 708 err(1, "setsockopt(IPV6_NEXTHOP)"); 709 } 710 711 freeaddrinfo(res); 712 } 713 714 /* 715 * let the kerel pass extension headers of incoming packets, 716 * for privileged socket options 717 */ 718 if ((options & F_VERBOSE) != 0) { 719 int opton = 1; 720 721 #ifdef IPV6_RECVHOPOPTS 722 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 723 sizeof(opton))) 724 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 725 #else /* old adv. API */ 726 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 727 sizeof(opton))) 728 err(1, "setsockopt(IPV6_HOPOPTS)"); 729 #endif 730 #ifdef IPV6_RECVDSTOPTS 731 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 732 sizeof(opton))) 733 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 734 #else /* old adv. API */ 735 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 736 sizeof(opton))) 737 err(1, "setsockopt(IPV6_DSTOPTS)"); 738 #endif 739 #ifdef IPV6_RECVRTHDRDSTOPTS 740 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 741 sizeof(opton))) 742 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 743 #endif 744 } 745 746 /* revoke root privilege */ 747 if (seteuid(getuid()) != 0) 748 err(1, "seteuid() failed"); 749 if (setuid(getuid()) != 0) 750 err(1, "setuid() failed"); 751 752 if ((options & F_FLOOD) && (options & F_INTERVAL)) 753 errx(1, "-f and -i incompatible options"); 754 755 if ((options & F_NOUSERDATA) == 0) { 756 if (datalen >= sizeof(struct tv32)) { 757 /* we can time transfer */ 758 timing = 1; 759 } else 760 timing = 0; 761 /* in F_VERBOSE case, we may get non-echoreply packets*/ 762 if (options & F_VERBOSE) 763 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 764 else 765 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 766 } else { 767 /* suppress timing for node information query */ 768 timing = 0; 769 datalen = 2048; 770 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 771 } 772 773 if (!(packet = (u_char *)malloc((u_int)packlen))) 774 err(1, "Unable to allocate packet"); 775 if (!(options & F_PINGFILLED)) 776 for (i = ICMP6ECHOLEN; i < packlen; ++i) 777 *datap++ = i; 778 779 ident = getpid() & 0xFFFF; 780 arc4random_buf(nonce, sizeof(nonce)); 781 optval = 1; 782 if (options & F_DONTFRAG) 783 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_DONTFRAG, 784 &optval, sizeof(optval)) == -1) 785 err(1, "IPV6_DONTFRAG"); 786 hold = 1; 787 788 if (options & F_SO_DEBUG) { 789 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 790 sizeof(hold)); 791 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 792 sizeof(hold)); 793 } 794 optval = IPV6_DEFHLIM; 795 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 796 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 797 &optval, sizeof(optval)) == -1) 798 err(1, "IPV6_MULTICAST_HOPS"); 799 #ifdef IPV6_USE_MIN_MTU 800 if (mflag != 1) { 801 optval = mflag > 1 ? 0 : 1; 802 803 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 804 &optval, sizeof(optval)) == -1) 805 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 806 } 807 #ifdef IPV6_RECVPATHMTU 808 else { 809 optval = 1; 810 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPATHMTU, 811 &optval, sizeof(optval)) == -1) 812 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 813 } 814 #endif /* IPV6_RECVPATHMTU */ 815 #endif /* IPV6_USE_MIN_MTU */ 816 817 #ifdef IPSEC 818 #ifdef IPSEC_POLICY_IPSEC 819 if (options & F_POLICY) { 820 if (setpolicy(srecv, policy_in) < 0) 821 errx(1, "%s", ipsec_strerror()); 822 if (setpolicy(ssend, policy_out) < 0) 823 errx(1, "%s", ipsec_strerror()); 824 } 825 #else 826 if (options & F_AUTHHDR) { 827 optval = IPSEC_LEVEL_REQUIRE; 828 #ifdef IPV6_AUTH_TRANS_LEVEL 829 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 830 &optval, sizeof(optval)) == -1) 831 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 832 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 833 &optval, sizeof(optval)) == -1) 834 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 835 #else /* old def */ 836 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 837 &optval, sizeof(optval)) == -1) 838 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 839 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 840 &optval, sizeof(optval)) == -1) 841 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 842 #endif 843 } 844 if (options & F_ENCRYPT) { 845 optval = IPSEC_LEVEL_REQUIRE; 846 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 847 &optval, sizeof(optval)) == -1) 848 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 849 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 850 &optval, sizeof(optval)) == -1) 851 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 852 } 853 #endif /*IPSEC_POLICY_IPSEC*/ 854 #endif 855 856 #ifdef ICMP6_FILTER 857 { 858 struct icmp6_filter filt; 859 if (!(options & F_VERBOSE)) { 860 ICMP6_FILTER_SETBLOCKALL(&filt); 861 if ((options & F_FQDN) || (options & F_FQDNOLD) || 862 (options & F_NODEADDR) || (options & F_SUPTYPES)) 863 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 864 else 865 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 866 } else { 867 ICMP6_FILTER_SETPASSALL(&filt); 868 } 869 if (setsockopt(srecv, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 870 sizeof(filt)) < 0) 871 err(1, "setsockopt(ICMP6_FILTER)"); 872 } 873 #endif /*ICMP6_FILTER*/ 874 875 /* let the kerel pass extension headers of incoming packets */ 876 if ((options & F_VERBOSE) != 0) { 877 int opton = 1; 878 879 #ifdef IPV6_RECVRTHDR 880 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 881 sizeof(opton))) 882 err(1, "setsockopt(IPV6_RECVRTHDR)"); 883 #else /* old adv. API */ 884 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RTHDR, &opton, 885 sizeof(opton))) 886 err(1, "setsockopt(IPV6_RTHDR)"); 887 #endif 888 } 889 890 /* 891 optval = 1; 892 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 893 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 894 &optval, sizeof(optval)) == -1) 895 err(1, "IPV6_MULTICAST_LOOP"); 896 */ 897 898 /* Specify the outgoing interface and/or the source address */ 899 if (usepktinfo) 900 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 901 902 if (hoplimit != -1) 903 ip6optlen += CMSG_SPACE(sizeof(int)); 904 905 /* set IP6 packet options */ 906 if (ip6optlen) { 907 if ((scmsg = (char *)malloc(ip6optlen)) == NULL) 908 errx(1, "can't allocate enough memory"); 909 smsghdr.msg_control = (caddr_t)scmsg; 910 smsghdr.msg_controllen = ip6optlen; 911 scmsgp = CMSG_FIRSTHDR(&smsghdr); 912 } 913 if (usepktinfo) { 914 cmsg_pktinfo = CMSG_DATA(scmsgp); 915 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 916 scmsgp->cmsg_level = IPPROTO_IPV6; 917 scmsgp->cmsg_type = IPV6_PKTINFO; 918 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 919 } 920 921 /* set the outgoing interface */ 922 if (ifname) { 923 #ifndef USE_SIN6_SCOPE_ID 924 /* pktinfo must have already been allocated */ 925 if ((pktinfo.ipi6_ifindex = if_nametoindex(ifname)) == 0) 926 errx(1, "%s: invalid interface name", ifname); 927 #else 928 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 929 errx(1, "%s: invalid interface name", ifname); 930 #endif 931 } 932 if (hoplimit != -1) { 933 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 934 scmsgp->cmsg_level = IPPROTO_IPV6; 935 scmsgp->cmsg_type = IPV6_HOPLIMIT; 936 memcpy(CMSG_DATA(scmsgp), &hoplimit, sizeof(hoplimit)); 937 938 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 939 } 940 941 if (tclass != -1) { 942 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_TCLASS, 943 &tclass, sizeof(tclass)) == -1) 944 err(1, "setsockopt(IPV6_TCLASS)"); 945 } 946 947 if (pcp != -2) { 948 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_VLAN_PCP, 949 &pcp, sizeof(pcp)) == -1) 950 err(1, "setsockopt(IPV6_VLAN_PCP)"); 951 } 952 953 if (argc > 1) { /* some intermediate addrs are specified */ 954 int hops; 955 int rthdrlen; 956 957 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 958 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 959 scmsgp->cmsg_level = IPPROTO_IPV6; 960 scmsgp->cmsg_type = IPV6_RTHDR; 961 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 962 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 963 IPV6_RTHDR_TYPE_0, argc - 1); 964 if (rthdr == NULL) 965 errx(1, "can't initialize rthdr"); 966 967 for (hops = 0; hops < argc - 1; hops++) { 968 memset(&hints, 0, sizeof(hints)); 969 hints.ai_family = AF_INET6; 970 971 if ((error = cap_getaddrinfo(capdns, argv[hops], NULL, &hints, 972 &res))) 973 errx(1, "%s", gai_strerror(error)); 974 if (res->ai_addr->sa_family != AF_INET6) 975 errx(1, 976 "bad addr family of an intermediate addr"); 977 sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr; 978 if (inet6_rth_add(rthdr, &sin6->sin6_addr)) 979 errx(1, "can't add an intermediate node"); 980 freeaddrinfo(res); 981 } 982 983 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 984 } 985 986 /* From now on we will use only reverse DNS lookups. */ 987 #ifdef WITH_CASPER 988 if (capdns != NULL) { 989 const char *types[1]; 990 991 types[0] = "ADDR2NAME"; 992 if (cap_dns_type_limit(capdns, types, nitems(types)) < 0) 993 err(1, "unable to limit access to system.dns service"); 994 } 995 #endif 996 if (!(options & F_SRCADDR)) { 997 /* 998 * get the source address. XXX since we revoked the root 999 * privilege, we cannot use a raw socket for this. 1000 */ 1001 int dummy; 1002 socklen_t len = sizeof(src); 1003 1004 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1005 err(1, "UDP socket"); 1006 1007 src.sin6_family = AF_INET6; 1008 src.sin6_addr = dst.sin6_addr; 1009 src.sin6_port = ntohs(DUMMY_PORT); 1010 src.sin6_scope_id = dst.sin6_scope_id; 1011 1012 if (usepktinfo && 1013 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 1014 (void *)&pktinfo, sizeof(pktinfo))) 1015 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 1016 1017 if (hoplimit != -1 && 1018 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 1019 (void *)&hoplimit, sizeof(hoplimit))) 1020 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); 1021 1022 if (hoplimit != -1 && 1023 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 1024 (void *)&hoplimit, sizeof(hoplimit))) 1025 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); 1026 1027 if (rthdr && 1028 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 1029 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 1030 err(1, "UDP setsockopt(IPV6_RTHDR)"); 1031 1032 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 1033 err(1, "UDP connect"); 1034 1035 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 1036 err(1, "getsockname"); 1037 1038 close(dummy); 1039 } 1040 1041 /* Save pktinfo in the ancillary data. */ 1042 if (usepktinfo) 1043 memcpy(cmsg_pktinfo, &pktinfo, sizeof(pktinfo)); 1044 1045 if (connect(ssend, (struct sockaddr *)&dst, sizeof(dst)) != 0) 1046 err(1, "connect() ssend"); 1047 1048 caph_cache_catpages(); 1049 if (caph_enter_casper() < 0) 1050 err(1, "caph_enter_casper"); 1051 1052 cap_rights_init(&rights_stdin); 1053 if (caph_rights_limit(STDIN_FILENO, &rights_stdin) < 0) 1054 err(1, "caph_rights_limit stdin"); 1055 if (caph_limit_stdout() < 0) 1056 err(1, "caph_limit_stdout"); 1057 if (caph_limit_stderr() < 0) 1058 err(1, "caph_limit_stderr"); 1059 1060 cap_rights_init(&rights_srecv, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 1061 if (caph_rights_limit(srecv, &rights_srecv) < 0) 1062 err(1, "caph_rights_limit srecv"); 1063 cap_rights_init(&rights_ssend, CAP_SEND, CAP_SETSOCKOPT); 1064 if (caph_rights_limit(ssend, &rights_ssend) < 0) 1065 err(1, "caph_rights_limit ssend"); 1066 1067 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 1068 if (sockbufsize) { 1069 if (datalen > (size_t)sockbufsize) 1070 warnx("you need -b to increase socket buffer size"); 1071 if (setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 1072 sizeof(sockbufsize)) < 0) 1073 err(1, "setsockopt(SO_SNDBUF)"); 1074 if (setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 1075 sizeof(sockbufsize)) < 0) 1076 err(1, "setsockopt(SO_RCVBUF)"); 1077 } 1078 else { 1079 if (datalen > 8 * 1024) /*XXX*/ 1080 warnx("you need -b to increase socket buffer size"); 1081 /* 1082 * When pinging the broadcast address, you can get a lot of 1083 * answers. Doing something so evil is useful if you are trying 1084 * to stress the ethernet, or just want to fill the arp cache 1085 * to get some stuff for /etc/ethers. 1086 */ 1087 hold = 48 * 1024; 1088 setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 1089 sizeof(hold)); 1090 } 1091 #endif 1092 1093 optval = 1; 1094 #ifndef USE_SIN6_SCOPE_ID 1095 #ifdef IPV6_RECVPKTINFO 1096 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 1097 sizeof(optval)) < 0) 1098 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 1099 #else /* old adv. API */ 1100 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 1101 sizeof(optval)) < 0) 1102 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 1103 #endif 1104 #endif /* USE_SIN6_SCOPE_ID */ 1105 #ifdef IPV6_RECVHOPLIMIT 1106 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 1107 sizeof(optval)) < 0) 1108 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 1109 #else /* old adv. API */ 1110 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 1111 sizeof(optval)) < 0) 1112 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 1113 #endif 1114 1115 cap_rights_clear(&rights_srecv, CAP_SETSOCKOPT); 1116 if (caph_rights_limit(srecv, &rights_srecv) < 0) 1117 err(1, "caph_rights_limit srecv setsockopt"); 1118 cap_rights_clear(&rights_ssend, CAP_SETSOCKOPT); 1119 if (caph_rights_limit(ssend, &rights_ssend) < 0) 1120 err(1, "caph_rights_limit ssend setsockopt"); 1121 1122 printf("PING(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 1123 (unsigned long)(pingerlen() - 8)); 1124 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 1125 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 1126 1127 if (preload == 0) 1128 pinger(); 1129 else { 1130 if (npackets != 0 && preload > npackets) 1131 preload = npackets; 1132 while (preload--) 1133 pinger(); 1134 } 1135 clock_gettime(CLOCK_MONOTONIC, &last); 1136 1137 sigemptyset(&si_sa.sa_mask); 1138 si_sa.sa_flags = 0; 1139 si_sa.sa_handler = onsignal; 1140 if (sigaction(SIGINT, &si_sa, 0) == -1) 1141 err(EX_OSERR, "sigaction SIGINT"); 1142 seenint = 0; 1143 if (sigaction(SIGINFO, &si_sa, 0) == -1) 1144 err(EX_OSERR, "sigaction SIGINFO"); 1145 seeninfo = 0; 1146 if (alarmtimeout > 0) { 1147 if (sigaction(SIGALRM, &si_sa, 0) == -1) 1148 err(EX_OSERR, "sigaction SIGALRM"); 1149 } 1150 if (options & F_FLOOD) { 1151 intvl.tv_sec = 0; 1152 intvl.tv_nsec = 10000000; 1153 } 1154 1155 almost_done = 0; 1156 while (seenint == 0) { 1157 struct timespec now, timeout; 1158 struct msghdr m; 1159 struct iovec iov[2]; 1160 fd_set rfds; 1161 int n; 1162 1163 /* signal handling */ 1164 if (seeninfo) { 1165 pr_summary(stderr); 1166 seeninfo = 0; 1167 continue; 1168 } 1169 FD_ZERO(&rfds); 1170 FD_SET(srecv, &rfds); 1171 clock_gettime(CLOCK_MONOTONIC, &now); 1172 timespecadd(&last, &intvl, &timeout); 1173 timespecsub(&timeout, &now, &timeout); 1174 if (timeout.tv_sec < 0) 1175 timespecclear(&timeout); 1176 1177 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 1178 if (n < 0) 1179 continue; /* EINTR */ 1180 if (n == 1) { 1181 m.msg_name = (caddr_t)&from; 1182 m.msg_namelen = sizeof(from); 1183 memset(&iov, 0, sizeof(iov)); 1184 iov[0].iov_base = (caddr_t)packet; 1185 iov[0].iov_len = packlen; 1186 m.msg_iov = iov; 1187 m.msg_iovlen = 1; 1188 memset(cm, 0, CONTROLLEN); 1189 m.msg_control = (void *)cm; 1190 m.msg_controllen = CONTROLLEN; 1191 1192 cc = recvmsg(srecv, &m, 0); 1193 if (cc < 0) { 1194 if (errno != EINTR) { 1195 warn("recvmsg"); 1196 sleep(1); 1197 } 1198 continue; 1199 } else if (cc == 0) { 1200 int mtu; 1201 1202 /* 1203 * receive control messages only. Process the 1204 * exceptions (currently the only possibility is 1205 * a path MTU notification.) 1206 */ 1207 if ((mtu = get_pathmtu(&m)) > 0) { 1208 if ((options & F_VERBOSE) != 0) { 1209 printf("new path MTU (%d) is " 1210 "notified\n", mtu); 1211 } 1212 } 1213 continue; 1214 } else { 1215 /* 1216 * an ICMPv6 message (probably an echoreply) 1217 * arrived. 1218 */ 1219 pr_pack(packet, cc, &m); 1220 } 1221 if (((options & F_ONCE) != 0 && nreceived > 0) || 1222 (npackets > 0 && nreceived >= npackets)) 1223 break; 1224 } 1225 if (n == 0 || (options & F_FLOOD)) { 1226 if (npackets == 0 || ntransmitted < npackets) 1227 pinger(); 1228 else { 1229 if (almost_done) 1230 break; 1231 almost_done = 1; 1232 /* 1233 * If we're not transmitting any more packets, 1234 * change the timer to wait two round-trip times 1235 * if we've received any packets or (waittime) 1236 * milliseconds if we haven't. 1237 */ 1238 intvl.tv_nsec = 0; 1239 if (nreceived) { 1240 intvl.tv_sec = 2 * tmax / 1000; 1241 if (intvl.tv_sec == 0) 1242 intvl.tv_sec = 1; 1243 } else { 1244 intvl.tv_sec = waittime / 1000; 1245 intvl.tv_nsec = 1246 waittime % 1000 * 1000000; 1247 } 1248 } 1249 clock_gettime(CLOCK_MONOTONIC, &last); 1250 if (ntransmitted - nreceived - 1 > nmissedmax) { 1251 nmissedmax = ntransmitted - nreceived - 1; 1252 if (options & F_MISSED) 1253 (void)write(STDOUT_FILENO, &BBELL, 1); 1254 } 1255 } 1256 } 1257 sigemptyset(&si_sa.sa_mask); 1258 si_sa.sa_flags = 0; 1259 si_sa.sa_handler = SIG_IGN; 1260 sigaction(SIGINT, &si_sa, 0); 1261 sigaction(SIGALRM, &si_sa, 0); 1262 pr_summary(stdout); 1263 1264 if(packet != NULL) 1265 free(packet); 1266 1267 if (nreceived > 0) 1268 exit(0); 1269 else if (ntransmitted > ntransmitfailures) 1270 exit(2); 1271 else 1272 exit(EX_OSERR); 1273 } 1274 1275 /* 1276 * pinger -- 1277 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1278 * will be added on by the kernel. The ID field is our UNIX process ID, 1279 * and the sequence number is an ascending integer. The first 8 bytes 1280 * of the data portion are used to hold a UNIX "timespec" struct in VAX 1281 * byte-order, to compute the round-trip time. 1282 */ 1283 static size_t 1284 pingerlen(void) 1285 { 1286 size_t l; 1287 1288 if (options & F_FQDN) 1289 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1290 else if (options & F_FQDNOLD) 1291 l = ICMP6_NIQLEN; 1292 else if (options & F_NODEADDR) 1293 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1294 else if (options & F_SUPTYPES) 1295 l = ICMP6_NIQLEN; 1296 else 1297 l = ICMP6ECHOLEN + datalen; 1298 1299 return l; 1300 } 1301 1302 static int 1303 pinger(void) 1304 { 1305 struct icmp6_hdr *icp; 1306 struct iovec iov[2]; 1307 int i, cc; 1308 struct icmp6_nodeinfo *nip; 1309 uint16_t seq; 1310 1311 if (npackets && ntransmitted >= npackets) 1312 return(-1); /* no more transmission */ 1313 1314 icp = (struct icmp6_hdr *)outpack; 1315 nip = (struct icmp6_nodeinfo *)outpack; 1316 memset(icp, 0, sizeof(*icp)); 1317 icp->icmp6_cksum = 0; 1318 seq = ntransmitted++; 1319 CLR(seq % mx_dup_ck); 1320 1321 if (options & F_FQDN) { 1322 uint16_t s; 1323 1324 icp->icmp6_type = ICMP6_NI_QUERY; 1325 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1326 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1327 nip->ni_flags = htons(0); 1328 1329 memcpy(nip->icmp6_ni_nonce, nonce, 1330 sizeof(nip->icmp6_ni_nonce)); 1331 s = htons(seq); 1332 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1333 1334 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1335 sizeof(dst.sin6_addr)); 1336 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1337 datalen = 0; 1338 } else if (options & F_FQDNOLD) { 1339 uint16_t s; 1340 /* packet format in 03 draft - no Subject data on queries */ 1341 icp->icmp6_type = ICMP6_NI_QUERY; 1342 icp->icmp6_code = 0; /* code field is always 0 */ 1343 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1344 nip->ni_flags = htons(0); 1345 1346 memcpy(nip->icmp6_ni_nonce, nonce, 1347 sizeof(nip->icmp6_ni_nonce)); 1348 s = htons(seq); 1349 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1350 1351 cc = ICMP6_NIQLEN; 1352 datalen = 0; 1353 } else if (options & F_NODEADDR) { 1354 uint16_t s; 1355 1356 icp->icmp6_type = ICMP6_NI_QUERY; 1357 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1358 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1359 nip->ni_flags = naflags; 1360 1361 memcpy(nip->icmp6_ni_nonce, nonce, 1362 sizeof(nip->icmp6_ni_nonce)); 1363 s = htons(seq); 1364 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1365 1366 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1367 sizeof(dst.sin6_addr)); 1368 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1369 datalen = 0; 1370 } else if (options & F_SUPTYPES) { 1371 uint16_t s; 1372 1373 icp->icmp6_type = ICMP6_NI_QUERY; 1374 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1375 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1376 /* we support compressed bitmap */ 1377 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1378 1379 memcpy(nip->icmp6_ni_nonce, nonce, 1380 sizeof(nip->icmp6_ni_nonce)); 1381 s = htons(seq); 1382 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1383 1384 cc = ICMP6_NIQLEN; 1385 datalen = 0; 1386 } else { 1387 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1388 icp->icmp6_code = 0; 1389 icp->icmp6_id = htons(ident); 1390 icp->icmp6_seq = htons(seq); 1391 if (timing) { 1392 struct timespec tv; 1393 struct tv32 tv32; 1394 (void)clock_gettime(CLOCK_MONOTONIC, &tv); 1395 /* 1396 * Truncate seconds down to 32 bits in order 1397 * to fit the timestamp within 8 bytes of the 1398 * packet. We're only concerned with 1399 * durations, not absolute times. 1400 */ 1401 tv32.tv32_sec = (uint32_t)htonl(tv.tv_sec); 1402 tv32.tv32_nsec = (uint32_t)htonl(tv.tv_nsec); 1403 memcpy(&outpack[ICMP6ECHOLEN], &tv32, sizeof(tv32)); 1404 } 1405 cc = ICMP6ECHOLEN + datalen; 1406 } 1407 1408 #ifdef DIAGNOSTIC 1409 if (pingerlen() != cc) 1410 errx(1, "internal error; length mismatch"); 1411 #endif 1412 1413 memset(&iov, 0, sizeof(iov)); 1414 iov[0].iov_base = (caddr_t)outpack; 1415 iov[0].iov_len = cc; 1416 smsghdr.msg_iov = iov; 1417 smsghdr.msg_iovlen = 1; 1418 1419 i = sendmsg(ssend, &smsghdr, 0); 1420 1421 if (i < 0 || i != cc) { 1422 if (i < 0) { 1423 ntransmitfailures++; 1424 warn("sendmsg"); 1425 } 1426 (void)printf("ping: wrote %s %d chars, ret=%d\n", 1427 hostname, cc, i); 1428 } 1429 if (!(options & F_QUIET) && options & F_DOT) 1430 (void)write(STDOUT_FILENO, &DOT[DOTidx++ % DOTlen], 1); 1431 1432 return(0); 1433 } 1434 1435 static int 1436 myechoreply(const struct icmp6_hdr *icp) 1437 { 1438 if (ntohs(icp->icmp6_id) == ident) 1439 return 1; 1440 else 1441 return 0; 1442 } 1443 1444 static int 1445 mynireply(const struct icmp6_nodeinfo *nip) 1446 { 1447 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1448 nonce + sizeof(u_int16_t), 1449 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1450 return 1; 1451 else 1452 return 0; 1453 } 1454 1455 /* 1456 * Decode a name from a DNS message. 1457 * 1458 * Format of the message is described in RFC 1035 subsection 4.1.4. 1459 * 1460 * Arguments: 1461 * sp - Pointer to a DNS pointer octet or to the first octet of a label 1462 * in the message. 1463 * ep - Pointer to the end of the message (one step past the last octet). 1464 * base - Pointer to the beginning of the message. 1465 * buf - Buffer into which the decoded name will be saved. 1466 * bufsiz - Size of the buffer 'buf'. 1467 * 1468 * Return value: 1469 * Pointer to an octet immediately following the ending zero octet 1470 * of the decoded label, or NULL if an error occurred. 1471 */ 1472 static const char * 1473 dnsdecode(const u_char *sp, const u_char *ep, const u_char *base, char *buf, 1474 size_t bufsiz) 1475 { 1476 int i; 1477 const u_char *cp; 1478 char cresult[MAXDNAME + 1]; 1479 const u_char *comp; 1480 int l; 1481 1482 cp = sp; 1483 *buf = '\0'; 1484 1485 if (cp >= ep) 1486 return NULL; 1487 while (cp < ep) { 1488 i = *cp; 1489 if (i == 0 || cp != sp) { 1490 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz) 1491 return NULL; /*result overrun*/ 1492 } 1493 if (i == 0) 1494 break; 1495 cp++; 1496 1497 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1498 /* DNS compression */ 1499 if (!base) 1500 return NULL; 1501 1502 comp = base + (i & 0x3f); 1503 if (dnsdecode(comp, cp, base, cresult, 1504 sizeof(cresult)) == NULL) 1505 return NULL; 1506 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1507 return NULL; /*result overrun*/ 1508 break; 1509 } else if ((i & 0x3f) == i) { 1510 if (i > ep - cp) 1511 return NULL; /*source overrun*/ 1512 while (i-- > 0 && cp < ep) { 1513 l = snprintf(cresult, sizeof(cresult), 1514 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1515 if ((size_t)l >= sizeof(cresult) || l < 0) 1516 return NULL; 1517 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1518 return NULL; /*result overrun*/ 1519 cp++; 1520 } 1521 } else 1522 return NULL; /*invalid label*/ 1523 } 1524 if (i != 0) 1525 return NULL; /*not terminated*/ 1526 cp++; 1527 return cp; 1528 } 1529 1530 /* 1531 * pr_pack -- 1532 * Print out the packet, if it came from us. This logic is necessary 1533 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1534 * which arrive ('tis only fair). This permits multiple copies of this 1535 * program to be run without having intermingled output (or statistics!). 1536 */ 1537 static void 1538 pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1539 { 1540 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1541 struct icmp6_hdr *icp; 1542 struct icmp6_nodeinfo *ni; 1543 int i; 1544 int hoplim; 1545 struct sockaddr *from; 1546 int fromlen; 1547 const u_char *cp = NULL; 1548 u_char *dp, *end = buf + cc; 1549 struct in6_pktinfo *pktinfo = NULL; 1550 struct timespec tv, tp; 1551 struct tv32 tpp; 1552 double triptime = 0; 1553 int dupflag; 1554 size_t off; 1555 int oldfqdn; 1556 u_int16_t seq; 1557 char dnsname[MAXDNAME + 1]; 1558 1559 (void)clock_gettime(CLOCK_MONOTONIC, &tv); 1560 1561 if (!mhdr || !mhdr->msg_name || 1562 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1563 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1564 if (options & F_VERBOSE) 1565 warnx("invalid peername"); 1566 return; 1567 } 1568 from = (struct sockaddr *)mhdr->msg_name; 1569 fromlen = mhdr->msg_namelen; 1570 if (cc < (int)sizeof(struct icmp6_hdr)) { 1571 if (options & F_VERBOSE) 1572 warnx("packet too short (%d bytes) from %s", cc, 1573 pr_addr(from, fromlen)); 1574 return; 1575 } 1576 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) && 1577 (options & F_VERBOSE) != 0) 1578 warnx("some control data discarded, insufficient buffer size"); 1579 icp = (struct icmp6_hdr *)buf; 1580 ni = (struct icmp6_nodeinfo *)buf; 1581 off = 0; 1582 1583 if ((hoplim = get_hoplim(mhdr)) == -1) { 1584 warnx("failed to get receiving hop limit"); 1585 return; 1586 } 1587 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1588 warnx("failed to get receiving packet information"); 1589 return; 1590 } 1591 1592 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1593 seq = ntohs(icp->icmp6_seq); 1594 ++nreceived; 1595 if (timing) { 1596 memcpy(&tpp, icp + 1, sizeof(tpp)); 1597 tp.tv_sec = ntohl(tpp.tv32_sec); 1598 tp.tv_nsec = ntohl(tpp.tv32_nsec); 1599 timespecsub(&tv, &tp, &tv); 1600 triptime = ((double)tv.tv_sec) * 1000.0 + 1601 ((double)tv.tv_nsec) / 1000000.0; 1602 tsum += triptime; 1603 tsumsq += triptime * triptime; 1604 if (triptime < tmin) 1605 tmin = triptime; 1606 if (triptime > tmax) 1607 tmax = triptime; 1608 } 1609 1610 if (TST(seq % mx_dup_ck)) { 1611 ++nrepeats; 1612 --nreceived; 1613 dupflag = 1; 1614 } else { 1615 SET(seq % mx_dup_ck); 1616 dupflag = 0; 1617 } 1618 1619 if (options & F_QUIET) 1620 return; 1621 1622 if (options & F_WAITTIME && triptime > waittime) { 1623 ++nrcvtimeout; 1624 return; 1625 } 1626 1627 if (options & F_DOT) 1628 (void)write(STDOUT_FILENO, &BSPACE, 1); 1629 else { 1630 if (options & F_AUDIBLE) 1631 (void)write(STDOUT_FILENO, &BBELL, 1); 1632 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1633 pr_addr(from, fromlen), seq); 1634 (void)printf(" hlim=%d", hoplim); 1635 if ((options & F_VERBOSE) != 0) { 1636 struct sockaddr_in6 dstsa; 1637 1638 memset(&dstsa, 0, sizeof(dstsa)); 1639 dstsa.sin6_family = AF_INET6; 1640 dstsa.sin6_len = sizeof(dstsa); 1641 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1642 dstsa.sin6_addr = pktinfo->ipi6_addr; 1643 (void)printf(" dst=%s", 1644 pr_addr((struct sockaddr *)&dstsa, 1645 sizeof(dstsa))); 1646 } 1647 if (timing) 1648 (void)printf(" time=%.3f ms", triptime); 1649 if (dupflag) 1650 (void)printf("(DUP!)"); 1651 /* check the data */ 1652 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1653 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1654 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1655 if (*cp != *dp) { 1656 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1657 break; 1658 } 1659 } 1660 } 1661 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1662 memcpy(&seq, ni->icmp6_ni_nonce, sizeof(seq)); 1663 seq = ntohs(seq); 1664 ++nreceived; 1665 if (TST(seq % mx_dup_ck)) { 1666 ++nrepeats; 1667 --nreceived; 1668 dupflag = 1; 1669 } else { 1670 SET(seq % mx_dup_ck); 1671 dupflag = 0; 1672 } 1673 1674 if (options & F_QUIET) 1675 return; 1676 1677 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1678 1679 switch (ntohs(ni->ni_code)) { 1680 case ICMP6_NI_SUCCESS: 1681 break; 1682 case ICMP6_NI_REFUSED: 1683 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1684 goto fqdnend; 1685 case ICMP6_NI_UNKNOWN: 1686 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1687 goto fqdnend; 1688 default: 1689 printf("unknown code 0x%x, type 0x%x", 1690 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1691 goto fqdnend; 1692 } 1693 1694 switch (ntohs(ni->ni_qtype)) { 1695 case NI_QTYPE_NOOP: 1696 printf("NodeInfo NOOP"); 1697 break; 1698 case NI_QTYPE_SUPTYPES: 1699 pr_suptypes(ni, end - (u_char *)ni); 1700 break; 1701 case NI_QTYPE_NODEADDR: 1702 pr_nodeaddr(ni, end - (u_char *)ni); 1703 break; 1704 case NI_QTYPE_FQDN: 1705 default: /* XXX: for backward compatibility */ 1706 cp = (u_char *)ni + ICMP6_NIRLEN; 1707 if (buf[off + ICMP6_NIRLEN] == 1708 cc - off - ICMP6_NIRLEN - 1) 1709 oldfqdn = 1; 1710 else 1711 oldfqdn = 0; 1712 if (oldfqdn) { 1713 cp++; /* skip length */ 1714 while (cp < end) { 1715 safeputc(*cp & 0xff); 1716 cp++; 1717 } 1718 } else { 1719 i = 0; 1720 while (cp < end) { 1721 cp = dnsdecode((const u_char *)cp, end, 1722 (const u_char *)(ni + 1), dnsname, 1723 sizeof(dnsname)); 1724 if (cp == NULL) { 1725 printf("???"); 1726 break; 1727 } 1728 /* 1729 * name-lookup special handling for 1730 * truncated name 1731 */ 1732 if (cp + 1 <= end && !*cp && 1733 strlen(dnsname) > 0) { 1734 dnsname[strlen(dnsname) - 1] = '\0'; 1735 cp++; 1736 } 1737 printf("%s%s", i > 0 ? "," : "", 1738 dnsname); 1739 } 1740 } 1741 if (options & F_VERBOSE) { 1742 u_long t; 1743 int32_t ttl; 1744 int comma = 0; 1745 1746 (void)printf(" ("); /*)*/ 1747 1748 switch (ni->ni_code) { 1749 case ICMP6_NI_REFUSED: 1750 (void)printf("refused"); 1751 comma++; 1752 break; 1753 case ICMP6_NI_UNKNOWN: 1754 (void)printf("unknown qtype"); 1755 comma++; 1756 break; 1757 } 1758 1759 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1760 /* case of refusion, unknown */ 1761 /*(*/ 1762 putchar(')'); 1763 goto fqdnend; 1764 } 1765 memcpy(&t, &buf[off+ICMP6ECHOLEN+8], sizeof(t)); 1766 ttl = (int32_t)ntohl(t); 1767 if (comma) 1768 printf(","); 1769 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1770 (void)printf("TTL=%d:meaningless", 1771 (int)ttl); 1772 } else { 1773 if (ttl < 0) { 1774 (void)printf("TTL=%d:invalid", 1775 ttl); 1776 } else 1777 (void)printf("TTL=%d", ttl); 1778 } 1779 comma++; 1780 1781 if (oldfqdn) { 1782 if (comma) 1783 printf(","); 1784 printf("03 draft"); 1785 comma++; 1786 } else { 1787 cp = (u_char *)ni + ICMP6_NIRLEN; 1788 if (cp == end) { 1789 if (comma) 1790 printf(","); 1791 printf("no name"); 1792 comma++; 1793 } 1794 } 1795 1796 if (buf[off + ICMP6_NIRLEN] != 1797 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1798 if (comma) 1799 printf(","); 1800 (void)printf("invalid namelen:%d/%lu", 1801 buf[off + ICMP6_NIRLEN], 1802 (u_long)cc - off - ICMP6_NIRLEN - 1); 1803 comma++; 1804 } 1805 /*(*/ 1806 putchar(')'); 1807 } 1808 fqdnend: 1809 ; 1810 } 1811 } else { 1812 /* We've got something other than an ECHOREPLY */ 1813 if (!(options & F_VERBOSE)) 1814 return; 1815 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1816 pr_icmph(icp, end); 1817 } 1818 1819 if (!(options & F_DOT)) { 1820 (void)putchar('\n'); 1821 if (options & F_VERBOSE) 1822 pr_exthdrs(mhdr); 1823 (void)fflush(stdout); 1824 } 1825 #undef safeputc 1826 } 1827 1828 static void 1829 pr_exthdrs(struct msghdr *mhdr) 1830 { 1831 ssize_t bufsize; 1832 void *bufp; 1833 struct cmsghdr *cm; 1834 1835 bufsize = 0; 1836 bufp = mhdr->msg_control; 1837 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1838 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1839 if (cm->cmsg_level != IPPROTO_IPV6) 1840 continue; 1841 1842 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp); 1843 if (bufsize <= 0) 1844 continue; 1845 switch (cm->cmsg_type) { 1846 case IPV6_HOPOPTS: 1847 printf(" HbH Options: "); 1848 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1849 break; 1850 case IPV6_DSTOPTS: 1851 #ifdef IPV6_RTHDRDSTOPTS 1852 case IPV6_RTHDRDSTOPTS: 1853 #endif 1854 printf(" Dst Options: "); 1855 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1856 break; 1857 case IPV6_RTHDR: 1858 printf(" Routing: "); 1859 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize); 1860 break; 1861 } 1862 } 1863 } 1864 1865 static void 1866 pr_ip6opt(void *extbuf, size_t bufsize) 1867 { 1868 struct ip6_hbh *ext; 1869 int currentlen; 1870 u_int8_t type; 1871 socklen_t extlen, len; 1872 void *databuf; 1873 size_t offset; 1874 u_int16_t value2; 1875 u_int32_t value4; 1876 1877 ext = (struct ip6_hbh *)extbuf; 1878 extlen = (ext->ip6h_len + 1) * 8; 1879 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1880 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1881 1882 /* 1883 * Bounds checking on the ancillary data buffer: 1884 * subtract the size of a cmsg structure from the buffer size. 1885 */ 1886 if (bufsize < (extlen + CMSG_SPACE(0))) { 1887 extlen = bufsize - CMSG_SPACE(0); 1888 warnx("options truncated, showing only %u (total=%u)", 1889 (unsigned int)(extlen / 8 - 1), 1890 (unsigned int)(ext->ip6h_len)); 1891 } 1892 1893 currentlen = 0; 1894 while (1) { 1895 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1896 &type, &len, &databuf); 1897 if (currentlen == -1) 1898 break; 1899 switch (type) { 1900 /* 1901 * Note that inet6_opt_next automatically skips any padding 1902 * optins. 1903 */ 1904 case IP6OPT_JUMBO: 1905 offset = 0; 1906 offset = inet6_opt_get_val(databuf, offset, 1907 &value4, sizeof(value4)); 1908 printf(" Jumbo Payload Opt: Length %u\n", 1909 (u_int32_t)ntohl(value4)); 1910 break; 1911 case IP6OPT_ROUTER_ALERT: 1912 offset = 0; 1913 offset = inet6_opt_get_val(databuf, offset, 1914 &value2, sizeof(value2)); 1915 printf(" Router Alert Opt: Type %u\n", 1916 ntohs(value2)); 1917 break; 1918 default: 1919 printf(" Received Opt %u len %lu\n", 1920 type, (unsigned long)len); 1921 break; 1922 } 1923 } 1924 return; 1925 } 1926 1927 static void 1928 pr_rthdr(void *extbuf, size_t bufsize) 1929 { 1930 struct in6_addr *in6; 1931 char ntopbuf[INET6_ADDRSTRLEN]; 1932 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1933 int i, segments, origsegs, rthsize, size0, size1; 1934 1935 /* print fixed part of the header */ 1936 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1937 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1938 if ((segments = inet6_rth_segments(extbuf)) >= 0) { 1939 printf("%d segments, ", segments); 1940 printf("%d left\n", rh->ip6r_segleft); 1941 } else { 1942 printf("segments unknown, "); 1943 printf("%d left\n", rh->ip6r_segleft); 1944 return; 1945 } 1946 1947 /* 1948 * Bounds checking on the ancillary data buffer. When calculating 1949 * the number of items to show keep in mind: 1950 * - The size of the cmsg structure 1951 * - The size of one segment (the size of a Type 0 routing header) 1952 * - When dividing add a fudge factor of one in case the 1953 * dividend is not evenly divisible by the divisor 1954 */ 1955 rthsize = (rh->ip6r_len + 1) * 8; 1956 if (bufsize < (rthsize + CMSG_SPACE(0))) { 1957 origsegs = segments; 1958 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0); 1959 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1); 1960 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) / 1961 (size1 - size0) + 1; 1962 warnx("segments truncated, showing only %d (total=%d)", 1963 segments, origsegs); 1964 } 1965 1966 for (i = 0; i < segments; i++) { 1967 in6 = inet6_rth_getaddr(extbuf, i); 1968 if (in6 == NULL) 1969 printf(" [%d]<NULL>\n", i); 1970 else { 1971 if (!inet_ntop(AF_INET6, in6, ntopbuf, 1972 sizeof(ntopbuf))) 1973 strlcpy(ntopbuf, "?", sizeof(ntopbuf)); 1974 printf(" [%d]%s\n", i, ntopbuf); 1975 } 1976 } 1977 1978 return; 1979 1980 } 1981 1982 static int 1983 pr_bitrange(u_int32_t v, int soff, int ii) 1984 { 1985 int off; 1986 int i; 1987 1988 off = 0; 1989 while (off < 32) { 1990 /* shift till we have 0x01 */ 1991 if ((v & 0x01) == 0) { 1992 if (ii > 1) 1993 printf("-%u", soff + off - 1); 1994 ii = 0; 1995 switch (v & 0x0f) { 1996 case 0x00: 1997 v >>= 4; 1998 off += 4; 1999 continue; 2000 case 0x08: 2001 v >>= 3; 2002 off += 3; 2003 continue; 2004 case 0x04: case 0x0c: 2005 v >>= 2; 2006 off += 2; 2007 continue; 2008 default: 2009 v >>= 1; 2010 off += 1; 2011 continue; 2012 } 2013 } 2014 2015 /* we have 0x01 with us */ 2016 for (i = 0; i < 32 - off; i++) { 2017 if ((v & (0x01 << i)) == 0) 2018 break; 2019 } 2020 if (!ii) 2021 printf(" %u", soff + off); 2022 ii += i; 2023 v >>= i; off += i; 2024 } 2025 return ii; 2026 } 2027 2028 static void 2029 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 2030 /* ni->qtype must be SUPTYPES */ 2031 { 2032 size_t clen; 2033 u_int32_t v; 2034 const u_char *cp, *end; 2035 u_int16_t cur; 2036 struct cbit { 2037 u_int16_t words; /*32bit count*/ 2038 u_int16_t skip; 2039 } cbit; 2040 #define MAXQTYPES (1 << 16) 2041 size_t off; 2042 int b; 2043 2044 cp = (u_char *)(ni + 1); 2045 end = ((u_char *)ni) + nilen; 2046 cur = 0; 2047 b = 0; 2048 2049 printf("NodeInfo Supported Qtypes"); 2050 if (options & F_VERBOSE) { 2051 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 2052 printf(", compressed bitmap"); 2053 else 2054 printf(", raw bitmap"); 2055 } 2056 2057 while (cp < end) { 2058 clen = (size_t)(end - cp); 2059 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 2060 if (clen == 0 || clen > MAXQTYPES / 8 || 2061 clen % sizeof(v)) { 2062 printf("???"); 2063 return; 2064 } 2065 } else { 2066 if (clen < sizeof(cbit) || clen % sizeof(v)) 2067 return; 2068 memcpy(&cbit, cp, sizeof(cbit)); 2069 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 2070 clen) 2071 return; 2072 cp += sizeof(cbit); 2073 clen = ntohs(cbit.words) * sizeof(v); 2074 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 2075 MAXQTYPES) 2076 return; 2077 } 2078 2079 for (off = 0; off < clen; off += sizeof(v)) { 2080 memcpy(&v, cp + off, sizeof(v)); 2081 v = (u_int32_t)ntohl(v); 2082 b = pr_bitrange(v, (int)(cur + off * 8), b); 2083 } 2084 /* flush the remaining bits */ 2085 b = pr_bitrange(0, (int)(cur + off * 8), b); 2086 2087 cp += clen; 2088 cur += clen * 8; 2089 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 2090 cur += ntohs(cbit.skip) * 32; 2091 } 2092 } 2093 2094 static void 2095 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 2096 /* ni->qtype must be NODEADDR */ 2097 { 2098 u_char *cp = (u_char *)(ni + 1); 2099 char ntop_buf[INET6_ADDRSTRLEN]; 2100 int withttl = 0; 2101 2102 nilen -= sizeof(struct icmp6_nodeinfo); 2103 2104 if (options & F_VERBOSE) { 2105 switch (ni->ni_code) { 2106 case ICMP6_NI_REFUSED: 2107 (void)printf("refused"); 2108 break; 2109 case ICMP6_NI_UNKNOWN: 2110 (void)printf("unknown qtype"); 2111 break; 2112 } 2113 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 2114 (void)printf(" truncated"); 2115 } 2116 putchar('\n'); 2117 if (nilen <= 0) 2118 printf(" no address\n"); 2119 2120 /* 2121 * In icmp-name-lookups 05 and later, TTL of each returned address 2122 * is contained in the resposne. We try to detect the version 2123 * by the length of the data, but note that the detection algorithm 2124 * is incomplete. We assume the latest draft by default. 2125 */ 2126 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 2127 withttl = 1; 2128 while (nilen > 0) { 2129 u_int32_t ttl = 0; 2130 2131 if (withttl) { 2132 uint32_t t; 2133 2134 memcpy(&t, cp, sizeof(t)); 2135 ttl = (u_int32_t)ntohl(t); 2136 cp += sizeof(u_int32_t); 2137 nilen -= sizeof(u_int32_t); 2138 } 2139 2140 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 2141 NULL) 2142 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2143 printf(" %s", ntop_buf); 2144 if (withttl) { 2145 if (ttl == 0xffffffff) { 2146 /* 2147 * XXX: can this convention be applied to all 2148 * type of TTL (i.e. non-ND TTL)? 2149 */ 2150 printf("(TTL=infty)"); 2151 } 2152 else 2153 printf("(TTL=%u)", ttl); 2154 } 2155 putchar('\n'); 2156 2157 nilen -= sizeof(struct in6_addr); 2158 cp += sizeof(struct in6_addr); 2159 } 2160 } 2161 2162 static int 2163 get_hoplim(struct msghdr *mhdr) 2164 { 2165 struct cmsghdr *cm; 2166 2167 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2168 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2169 if (cm->cmsg_len == 0) 2170 return(-1); 2171 2172 if (cm->cmsg_level == IPPROTO_IPV6 && 2173 cm->cmsg_type == IPV6_HOPLIMIT && 2174 cm->cmsg_len == CMSG_LEN(sizeof(int))) { 2175 int r; 2176 2177 memcpy(&r, CMSG_DATA(cm), sizeof(r)); 2178 return(r); 2179 } 2180 } 2181 2182 return(-1); 2183 } 2184 2185 static struct in6_pktinfo * 2186 get_rcvpktinfo(struct msghdr *mhdr) 2187 { 2188 static struct in6_pktinfo pi; 2189 struct cmsghdr *cm; 2190 2191 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2192 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2193 if (cm->cmsg_len == 0) 2194 return(NULL); 2195 2196 if (cm->cmsg_level == IPPROTO_IPV6 && 2197 cm->cmsg_type == IPV6_PKTINFO && 2198 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) { 2199 memcpy(&pi, CMSG_DATA(cm), sizeof(pi)); 2200 return(&pi); 2201 } 2202 } 2203 2204 return(NULL); 2205 } 2206 2207 static int 2208 get_pathmtu(struct msghdr *mhdr) 2209 { 2210 #ifdef IPV6_RECVPATHMTU 2211 struct cmsghdr *cm; 2212 struct ip6_mtuinfo mtuctl; 2213 2214 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2215 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2216 if (cm->cmsg_len == 0) 2217 return(0); 2218 2219 if (cm->cmsg_level == IPPROTO_IPV6 && 2220 cm->cmsg_type == IPV6_PATHMTU && 2221 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2222 memcpy(&mtuctl, CMSG_DATA(cm), sizeof(mtuctl)); 2223 2224 /* 2225 * If the notified destination is different from 2226 * the one we are pinging, just ignore the info. 2227 * We check the scope ID only when both notified value 2228 * and our own value have non-0 values, because we may 2229 * have used the default scope zone ID for sending, 2230 * in which case the scope ID value is 0. 2231 */ 2232 if (!IN6_ARE_ADDR_EQUAL(&mtuctl.ip6m_addr.sin6_addr, 2233 &dst.sin6_addr) || 2234 (mtuctl.ip6m_addr.sin6_scope_id && 2235 dst.sin6_scope_id && 2236 mtuctl.ip6m_addr.sin6_scope_id != 2237 dst.sin6_scope_id)) { 2238 if ((options & F_VERBOSE) != 0) { 2239 printf("path MTU for %s is notified. " 2240 "(ignored)\n", 2241 pr_addr((struct sockaddr *)&mtuctl.ip6m_addr, 2242 sizeof(mtuctl.ip6m_addr))); 2243 } 2244 return(0); 2245 } 2246 2247 /* 2248 * Ignore an invalid MTU. XXX: can we just believe 2249 * the kernel check? 2250 */ 2251 if (mtuctl.ip6m_mtu < IPV6_MMTU) 2252 return(0); 2253 2254 /* notification for our destination. return the MTU. */ 2255 return((int)mtuctl.ip6m_mtu); 2256 } 2257 } 2258 #endif 2259 return(0); 2260 } 2261 2262 /*subject type*/ 2263 static const char *niqcode[] = { 2264 "IPv6 address", 2265 "DNS label", /*or empty*/ 2266 "IPv4 address", 2267 }; 2268 2269 /*result code*/ 2270 static const char *nircode[] = { 2271 "Success", "Refused", "Unknown", 2272 }; 2273 2274 2275 /* 2276 * pr_icmph -- 2277 * Print a descriptive string about an ICMP header. 2278 */ 2279 static void 2280 pr_icmph(struct icmp6_hdr *icp, u_char *end) 2281 { 2282 char ntop_buf[INET6_ADDRSTRLEN]; 2283 struct nd_redirect *red; 2284 struct icmp6_nodeinfo *ni; 2285 char dnsname[MAXDNAME + 1]; 2286 const u_char *cp; 2287 size_t l; 2288 2289 switch (icp->icmp6_type) { 2290 case ICMP6_DST_UNREACH: 2291 switch (icp->icmp6_code) { 2292 case ICMP6_DST_UNREACH_NOROUTE: 2293 (void)printf("No Route to Destination\n"); 2294 break; 2295 case ICMP6_DST_UNREACH_ADMIN: 2296 (void)printf("Destination Administratively " 2297 "Unreachable\n"); 2298 break; 2299 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2300 (void)printf("Destination Unreachable Beyond Scope\n"); 2301 break; 2302 case ICMP6_DST_UNREACH_ADDR: 2303 (void)printf("Destination Host Unreachable\n"); 2304 break; 2305 case ICMP6_DST_UNREACH_NOPORT: 2306 (void)printf("Destination Port Unreachable\n"); 2307 break; 2308 default: 2309 (void)printf("Destination Unreachable, Bad Code: %d\n", 2310 icp->icmp6_code); 2311 break; 2312 } 2313 /* Print returned IP header information */ 2314 pr_retip((struct ip6_hdr *)(icp + 1), end); 2315 break; 2316 case ICMP6_PACKET_TOO_BIG: 2317 (void)printf("Packet too big mtu = %d\n", 2318 (int)ntohl(icp->icmp6_mtu)); 2319 pr_retip((struct ip6_hdr *)(icp + 1), end); 2320 break; 2321 case ICMP6_TIME_EXCEEDED: 2322 switch (icp->icmp6_code) { 2323 case ICMP6_TIME_EXCEED_TRANSIT: 2324 (void)printf("Time to live exceeded\n"); 2325 break; 2326 case ICMP6_TIME_EXCEED_REASSEMBLY: 2327 (void)printf("Frag reassembly time exceeded\n"); 2328 break; 2329 default: 2330 (void)printf("Time exceeded, Bad Code: %d\n", 2331 icp->icmp6_code); 2332 break; 2333 } 2334 pr_retip((struct ip6_hdr *)(icp + 1), end); 2335 break; 2336 case ICMP6_PARAM_PROB: 2337 (void)printf("Parameter problem: "); 2338 switch (icp->icmp6_code) { 2339 case ICMP6_PARAMPROB_HEADER: 2340 (void)printf("Erroneous Header "); 2341 break; 2342 case ICMP6_PARAMPROB_NEXTHEADER: 2343 (void)printf("Unknown Nextheader "); 2344 break; 2345 case ICMP6_PARAMPROB_OPTION: 2346 (void)printf("Unrecognized Option "); 2347 break; 2348 default: 2349 (void)printf("Bad code(%d) ", icp->icmp6_code); 2350 break; 2351 } 2352 (void)printf("pointer = 0x%02x\n", 2353 (u_int32_t)ntohl(icp->icmp6_pptr)); 2354 pr_retip((struct ip6_hdr *)(icp + 1), end); 2355 break; 2356 case ICMP6_ECHO_REQUEST: 2357 (void)printf("Echo Request"); 2358 /* XXX ID + Seq + Data */ 2359 break; 2360 case ICMP6_ECHO_REPLY: 2361 (void)printf("Echo Reply"); 2362 /* XXX ID + Seq + Data */ 2363 break; 2364 case ICMP6_MEMBERSHIP_QUERY: 2365 (void)printf("Listener Query"); 2366 break; 2367 case ICMP6_MEMBERSHIP_REPORT: 2368 (void)printf("Listener Report"); 2369 break; 2370 case ICMP6_MEMBERSHIP_REDUCTION: 2371 (void)printf("Listener Done"); 2372 break; 2373 case ND_ROUTER_SOLICIT: 2374 (void)printf("Router Solicitation"); 2375 break; 2376 case ND_ROUTER_ADVERT: 2377 (void)printf("Router Advertisement"); 2378 break; 2379 case ND_NEIGHBOR_SOLICIT: 2380 (void)printf("Neighbor Solicitation"); 2381 break; 2382 case ND_NEIGHBOR_ADVERT: 2383 (void)printf("Neighbor Advertisement"); 2384 break; 2385 case ND_REDIRECT: 2386 red = (struct nd_redirect *)icp; 2387 (void)printf("Redirect\n"); 2388 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2389 sizeof(ntop_buf))) 2390 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2391 (void)printf("Destination: %s", ntop_buf); 2392 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2393 sizeof(ntop_buf))) 2394 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2395 (void)printf(" New Target: %s", ntop_buf); 2396 break; 2397 case ICMP6_NI_QUERY: 2398 (void)printf("Node Information Query"); 2399 /* XXX ID + Seq + Data */ 2400 ni = (struct icmp6_nodeinfo *)icp; 2401 l = end - (u_char *)(ni + 1); 2402 printf(", "); 2403 switch (ntohs(ni->ni_qtype)) { 2404 case NI_QTYPE_NOOP: 2405 (void)printf("NOOP"); 2406 break; 2407 case NI_QTYPE_SUPTYPES: 2408 (void)printf("Supported qtypes"); 2409 break; 2410 case NI_QTYPE_FQDN: 2411 (void)printf("DNS name"); 2412 break; 2413 case NI_QTYPE_NODEADDR: 2414 (void)printf("nodeaddr"); 2415 break; 2416 case NI_QTYPE_IPV4ADDR: 2417 (void)printf("IPv4 nodeaddr"); 2418 break; 2419 default: 2420 (void)printf("unknown qtype"); 2421 break; 2422 } 2423 if (options & F_VERBOSE) { 2424 switch (ni->ni_code) { 2425 case ICMP6_NI_SUBJ_IPV6: 2426 if (l == sizeof(struct in6_addr) && 2427 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2428 sizeof(ntop_buf)) != NULL) { 2429 (void)printf(", subject=%s(%s)", 2430 niqcode[ni->ni_code], ntop_buf); 2431 } else { 2432 #if 1 2433 /* backward compat to -W */ 2434 (void)printf(", oldfqdn"); 2435 #else 2436 (void)printf(", invalid"); 2437 #endif 2438 } 2439 break; 2440 case ICMP6_NI_SUBJ_FQDN: 2441 if (end == (u_char *)(ni + 1)) { 2442 (void)printf(", no subject"); 2443 break; 2444 } 2445 printf(", subject=%s", niqcode[ni->ni_code]); 2446 cp = (const u_char *)(ni + 1); 2447 cp = dnsdecode(cp, end, NULL, dnsname, 2448 sizeof(dnsname)); 2449 if (cp != NULL) 2450 printf("(%s)", dnsname); 2451 else 2452 printf("(invalid)"); 2453 break; 2454 case ICMP6_NI_SUBJ_IPV4: 2455 if (l == sizeof(struct in_addr) && 2456 inet_ntop(AF_INET, ni + 1, ntop_buf, 2457 sizeof(ntop_buf)) != NULL) { 2458 (void)printf(", subject=%s(%s)", 2459 niqcode[ni->ni_code], ntop_buf); 2460 } else 2461 (void)printf(", invalid"); 2462 break; 2463 default: 2464 (void)printf(", invalid"); 2465 break; 2466 } 2467 } 2468 break; 2469 case ICMP6_NI_REPLY: 2470 (void)printf("Node Information Reply"); 2471 /* XXX ID + Seq + Data */ 2472 ni = (struct icmp6_nodeinfo *)icp; 2473 printf(", "); 2474 switch (ntohs(ni->ni_qtype)) { 2475 case NI_QTYPE_NOOP: 2476 (void)printf("NOOP"); 2477 break; 2478 case NI_QTYPE_SUPTYPES: 2479 (void)printf("Supported qtypes"); 2480 break; 2481 case NI_QTYPE_FQDN: 2482 (void)printf("DNS name"); 2483 break; 2484 case NI_QTYPE_NODEADDR: 2485 (void)printf("nodeaddr"); 2486 break; 2487 case NI_QTYPE_IPV4ADDR: 2488 (void)printf("IPv4 nodeaddr"); 2489 break; 2490 default: 2491 (void)printf("unknown qtype"); 2492 break; 2493 } 2494 if (options & F_VERBOSE) { 2495 if (ni->ni_code > nitems(nircode)) 2496 printf(", invalid"); 2497 else 2498 printf(", %s", nircode[ni->ni_code]); 2499 } 2500 break; 2501 default: 2502 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2503 } 2504 } 2505 2506 /* 2507 * pr_iph -- 2508 * Print an IP6 header. 2509 */ 2510 static void 2511 pr_iph(struct ip6_hdr *ip6) 2512 { 2513 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2514 u_int8_t tc; 2515 char ntop_buf[INET6_ADDRSTRLEN]; 2516 2517 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2518 tc = (tc >> 4) & 0x0f; 2519 tc |= (ip6->ip6_vfc << 4); 2520 2521 printf("Vr TC Flow Plen Nxt Hlim\n"); 2522 printf(" %1x %02x %05x %04x %02x %02x\n", 2523 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2524 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2525 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2526 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2527 printf("%s->", ntop_buf); 2528 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2529 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2530 printf("%s\n", ntop_buf); 2531 } 2532 2533 /* 2534 * pr_addr -- 2535 * Return an ascii host address as a dotted quad and optionally with 2536 * a hostname. 2537 */ 2538 static const char * 2539 pr_addr(struct sockaddr *addr, int addrlen) 2540 { 2541 static char buf[NI_MAXHOST]; 2542 int flag = 0; 2543 2544 if (!(options & F_HOSTNAME)) 2545 flag |= NI_NUMERICHOST; 2546 2547 if (cap_getnameinfo(capdns, addr, addrlen, buf, sizeof(buf), NULL, 0, 2548 flag) == 0) 2549 return (buf); 2550 else 2551 return "?"; 2552 } 2553 2554 /* 2555 * pr_retip -- 2556 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2557 */ 2558 static void 2559 pr_retip(struct ip6_hdr *ip6, u_char *end) 2560 { 2561 u_char *cp = (u_char *)ip6, nh; 2562 int hlen; 2563 2564 if ((size_t)(end - (u_char *)ip6) < sizeof(*ip6)) { 2565 printf("IP6"); 2566 goto trunc; 2567 } 2568 pr_iph(ip6); 2569 hlen = sizeof(*ip6); 2570 2571 nh = ip6->ip6_nxt; 2572 cp += hlen; 2573 while (end - cp >= 8) { 2574 #ifdef IPSEC 2575 struct ah ah; 2576 #endif 2577 2578 switch (nh) { 2579 case IPPROTO_HOPOPTS: 2580 printf("HBH "); 2581 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2582 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2583 break; 2584 case IPPROTO_DSTOPTS: 2585 printf("DSTOPT "); 2586 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2587 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2588 break; 2589 case IPPROTO_FRAGMENT: 2590 printf("FRAG "); 2591 hlen = sizeof(struct ip6_frag); 2592 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2593 break; 2594 case IPPROTO_ROUTING: 2595 printf("RTHDR "); 2596 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2597 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2598 break; 2599 #ifdef IPSEC 2600 case IPPROTO_AH: 2601 printf("AH "); 2602 memcpy(&ah, cp, sizeof(ah)); 2603 hlen = (ah.ah_len+2) << 2; 2604 nh = ah.ah_nxt; 2605 break; 2606 #endif 2607 case IPPROTO_ICMPV6: 2608 printf("ICMP6: type = %d, code = %d\n", 2609 *cp, *(cp + 1)); 2610 return; 2611 case IPPROTO_ESP: 2612 printf("ESP\n"); 2613 return; 2614 case IPPROTO_TCP: 2615 printf("TCP: from port %u, to port %u (decimal)\n", 2616 (*cp * 256 + *(cp + 1)), 2617 (*(cp + 2) * 256 + *(cp + 3))); 2618 return; 2619 case IPPROTO_UDP: 2620 printf("UDP: from port %u, to port %u (decimal)\n", 2621 (*cp * 256 + *(cp + 1)), 2622 (*(cp + 2) * 256 + *(cp + 3))); 2623 return; 2624 default: 2625 printf("Unknown Header(%d)\n", nh); 2626 return; 2627 } 2628 2629 if ((cp += hlen) >= end) 2630 goto trunc; 2631 } 2632 if (end - cp < 8) 2633 goto trunc; 2634 2635 putchar('\n'); 2636 return; 2637 2638 trunc: 2639 printf("...\n"); 2640 return; 2641 } 2642 2643 static void 2644 fill(char *bp, char *patp) 2645 { 2646 int ii, jj, kk; 2647 int pat[16]; 2648 char *cp; 2649 2650 for (cp = patp; *cp; cp++) 2651 if (!isxdigit(*cp)) 2652 errx(1, "patterns must be specified as hex digits"); 2653 ii = sscanf(patp, 2654 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2655 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2656 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2657 &pat[13], &pat[14], &pat[15]); 2658 2659 /* xxx */ 2660 if (ii > 0) 2661 for (kk = 0; 2662 (size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + ii; 2663 kk += ii) 2664 for (jj = 0; jj < ii; ++jj) 2665 bp[jj + kk] = pat[jj]; 2666 if (!(options & F_QUIET)) { 2667 (void)printf("PATTERN: 0x"); 2668 for (jj = 0; jj < ii; ++jj) 2669 (void)printf("%02x", bp[jj] & 0xFF); 2670 (void)printf("\n"); 2671 } 2672 } 2673 2674 #ifdef IPSEC 2675 #ifdef IPSEC_POLICY_IPSEC 2676 static int 2677 setpolicy(int so __unused, char *policy) 2678 { 2679 char *buf; 2680 2681 if (policy == NULL) 2682 return 0; /* ignore */ 2683 2684 buf = ipsec_set_policy(policy, strlen(policy)); 2685 if (buf == NULL) 2686 errx(1, "%s", ipsec_strerror()); 2687 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2688 ipsec_get_policylen(buf)) < 0) 2689 warnx("Unable to set IPsec policy"); 2690 free(buf); 2691 2692 return 0; 2693 } 2694 #endif 2695 #endif 2696 2697 static char * 2698 nigroup(char *name, int nig_oldmcprefix) 2699 { 2700 char *p; 2701 char *q; 2702 MD5_CTX ctxt; 2703 u_int8_t digest[16]; 2704 u_int8_t c; 2705 size_t l; 2706 char hbuf[NI_MAXHOST]; 2707 struct in6_addr in6; 2708 int valid; 2709 2710 p = strchr(name, '.'); 2711 if (!p) 2712 p = name + strlen(name); 2713 l = p - name; 2714 if (l > 63 || l > sizeof(hbuf) - 1) 2715 return NULL; /*label too long*/ 2716 strncpy(hbuf, name, l); 2717 hbuf[(int)l] = '\0'; 2718 2719 for (q = name; *q; q++) { 2720 if (isupper(*(unsigned char *)q)) 2721 *q = tolower(*(unsigned char *)q); 2722 } 2723 2724 /* generate 16 bytes of pseudo-random value. */ 2725 memset(&ctxt, 0, sizeof(ctxt)); 2726 MD5Init(&ctxt); 2727 c = l & 0xff; 2728 MD5Update(&ctxt, &c, sizeof(c)); 2729 MD5Update(&ctxt, (unsigned char *)name, l); 2730 MD5Final(digest, &ctxt); 2731 2732 if (nig_oldmcprefix) { 2733 /* draft-ietf-ipngwg-icmp-name-lookup */ 2734 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6); 2735 } else { 2736 /* RFC 4620 */ 2737 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6); 2738 } 2739 if (valid != 1) 2740 return NULL; /*XXX*/ 2741 2742 if (nig_oldmcprefix) { 2743 /* draft-ietf-ipngwg-icmp-name-lookup */ 2744 bcopy(digest, &in6.s6_addr[12], 4); 2745 } else { 2746 /* RFC 4620 */ 2747 bcopy(digest, &in6.s6_addr[13], 3); 2748 } 2749 2750 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2751 return NULL; 2752 2753 return strdup(hbuf); 2754 } 2755 2756 static cap_channel_t * 2757 capdns_setup(void) 2758 { 2759 cap_channel_t *capcas, *capdnsloc; 2760 #ifdef WITH_CASPER 2761 const char *types[2]; 2762 int families[1]; 2763 #endif 2764 capcas = cap_init(); 2765 if (capcas == NULL) 2766 err(1, "unable to create casper process"); 2767 capdnsloc = cap_service_open(capcas, "system.dns"); 2768 /* Casper capability no longer needed. */ 2769 cap_close(capcas); 2770 if (capdnsloc == NULL) 2771 err(1, "unable to open system.dns service"); 2772 #ifdef WITH_CASPER 2773 types[0] = "NAME2ADDR"; 2774 types[1] = "ADDR2NAME"; 2775 if (cap_dns_type_limit(capdnsloc, types, nitems(types)) < 0) 2776 err(1, "unable to limit access to system.dns service"); 2777 families[0] = AF_INET6; 2778 if (cap_dns_family_limit(capdnsloc, families, nitems(families)) < 0) 2779 err(1, "unable to limit access to system.dns service"); 2780 #endif 2781 return (capdnsloc); 2782 } 2783