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/* 69 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 70 * measure round-trip-delays and packet loss across network paths. 71 * 72 * Author - 73 * Mike Muuss 74 * U. S. Army Ballistic Research Laboratory 75 * December, 1983 76 * 77 * Status - 78 * Public Domain. Distribution Unlimited. 79 * Bugs - 80 * More statistics could always be gathered. 81 * This program has to run SUID to ROOT to access the ICMP socket. 82 */ 83/* 84 * NOTE: 85 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics 86 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link* 87 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of 88 * network attached to 1 or more interfaces) 89 */ 90 91#include <sys/param.h> 92#ifndef __HAIKU__ 93#include <sys/capsicum.h> 94#endif 95#include <sys/uio.h> 96#include <sys/socket.h> 97 98#include <net/if.h> 99#include <net/route.h> 100 101#include <netinet/in.h> 102#include <netinet/ip6.h> 103#include <netinet/icmp6.h> 104#include <arpa/inet.h> 105#include <arpa/nameser.h> 106#include <netdb.h> 107 108#ifndef __HAIKU__ 109#include <capsicum_helpers.h> 110#include <casper/cap_dns.h> 111#include <libcasper.h> 112#endif 113 114#include <ctype.h> 115#include <err.h> 116#include <errno.h> 117#include <fcntl.h> 118#include <signal.h> 119#include <stdio.h> 120#include <stdlib.h> 121#include <string.h> 122#include <sysexits.h> 123#include <time.h> 124#include <unistd.h> 125 126#ifdef IPSEC 127#include <netipsec/ah.h> 128#include <netipsec/ipsec.h> 129#endif 130 131#ifndef __HAIKU__ 132#include <md5.h> 133#endif 134 135#include "main.h" 136#include "ping6.h" 137 138struct tv32 { 139 u_int32_t tv32_sec; 140 u_int32_t tv32_nsec; 141}; 142 143#define MAXPACKETLEN 131072 144#define IP6LEN 40 145#define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 146#define ICMP6ECHOTMLEN sizeof(struct tv32) 147#define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 148# define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */ 149/* FQDN case, 64 bits of nonce + 32 bits ttl */ 150#define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 151#define EXTRA 256 /* for AH and various other headers. weird. */ 152#define DEFDATALEN ICMP6ECHOTMLEN 153#define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 154#define NROUTES 9 /* number of record route slots */ 155#define MAXWAIT 10000 /* max ms to wait for response */ 156#define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 157 158#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 159#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 160#define SET(bit) (A(bit) |= B(bit)) 161#define CLR(bit) (A(bit) &= (~B(bit))) 162#define TST(bit) (A(bit) & B(bit)) 163 164#define F_FLOOD 0x0001 165#define F_INTERVAL 0x0002 166#define F_PINGFILLED 0x0008 167#define F_QUIET 0x0010 168#define F_RROUTE 0x0020 169#define F_SO_DEBUG 0x0040 170#define F_VERBOSE 0x0100 171#ifdef IPSEC 172#ifdef IPSEC_POLICY_IPSEC 173#define F_POLICY 0x0400 174#else 175#define F_AUTHHDR 0x0200 176#define F_ENCRYPT 0x0400 177#endif /*IPSEC_POLICY_IPSEC*/ 178#endif /*IPSEC*/ 179#define F_NODEADDR 0x0800 180#define F_FQDN 0x1000 181#define F_INTERFACE 0x2000 182#define F_SRCADDR 0x4000 183#define F_FQDNOLD 0x20000 184#define F_NIGROUP 0x40000 185#define F_SUPTYPES 0x80000 186#define F_NOMINMTU 0x100000 187#define F_ONCE 0x200000 188#define F_AUDIBLE 0x400000 189#define F_MISSED 0x800000 190#define F_DONTFRAG 0x1000000 191#define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 192#define F_WAITTIME 0x2000000 193#define F_DOT 0x4000000 194 195#define IN6LEN sizeof(struct in6_addr) 196#define SA6LEN sizeof(struct sockaddr_in6) 197#define DUMMY_PORT 10101 198 199#define SIN6(s) ((struct sockaddr_in6 *)(s)) 200 201/* 202 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 203 * number of received sequence numbers we can keep track of. Change 128 204 * to 8192 for complete accuracy... 205 */ 206#define MAX_DUP_CHK (8 * 8192) 207static int mx_dup_ck = MAX_DUP_CHK; 208static char rcvd_tbl[MAX_DUP_CHK / 8]; 209 210static struct sockaddr_in6 dst; /* who to ping6 */ 211static struct sockaddr_in6 src; /* src addr of this packet */ 212static socklen_t srclen; 213static size_t datalen = DEFDATALEN; 214static int ssend; /* send socket file descriptor */ 215static int srecv; /* receive socket file descriptor */ 216static u_char outpack[MAXPACKETLEN]; 217static char BSPACE = '\b'; /* characters written for flood */ 218static char BBELL = '\a'; /* characters written for AUDIBLE */ 219static const char *DOT = "."; 220static size_t DOTlen = 1; 221static size_t DOTidx = 0; 222static int ident; /* process id to identify our packets */ 223static u_int8_t nonce[8]; /* nonce field for node information */ 224static int hoplimit = -1; /* hoplimit */ 225static int tclass = -1; /* traffic class */ 226static int pcp = -2; /* vlan priority code point */ 227static u_char *packet = NULL; 228#ifndef __HAIKU__ 229static cap_channel_t *capdns; 230#endif 231 232/* counters */ 233static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 234static long npackets; /* max packets to transmit */ 235static long ntransmitfailures; /* number of transmit failures */ 236static int interval = 1000; /* interval between packets in ms */ 237static int waittime = MAXWAIT; /* timeout for each packet */ 238 239/* for node addresses */ 240static u_short naflags; 241 242/* for ancillary data(advanced API) */ 243static struct msghdr smsghdr; 244static struct iovec smsgiov; 245static char *scmsg = 0; 246 247#ifndef __HAIKU__ 248static cap_channel_t *capdns_setup(void); 249#endif 250static void fill(char *, char *); 251static int get_hoplim(struct msghdr *); 252static int get_pathmtu(struct msghdr *); 253static struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); 254static size_t pingerlen(void); 255static int pinger(void); 256static const char *pr_addr(struct sockaddr *, int); 257static void pr_icmph(struct icmp6_hdr *, u_char *); 258static void pr_iph(struct ip6_hdr *); 259static void pr_suptypes(struct icmp6_nodeinfo *, size_t); 260static void pr_nodeaddr(struct icmp6_nodeinfo *, int); 261static int myechoreply(const struct icmp6_hdr *); 262static int mynireply(const struct icmp6_nodeinfo *); 263static const char *dnsdecode(const u_char *, const u_char *, const u_char *, 264 char *, size_t); 265static void pr_pack(u_char *, int, struct msghdr *); 266static void pr_exthdrs(struct msghdr *); 267static void pr_ip6opt(void *, size_t); 268static void pr_rthdr(void *, size_t); 269static int pr_bitrange(u_int32_t, int, int); 270static void pr_retip(struct ip6_hdr *, u_char *); 271#ifdef IPSEC 272#ifdef IPSEC_POLICY_IPSEC 273static int setpolicy(int, char *); 274#endif 275#endif 276#ifndef __HAIKU__ 277static char *nigroup(char *, int); 278#endif 279 280int 281ping6(int argc, char *argv[]) 282{ 283 struct timespec last, intvl; 284 struct sockaddr_in6 from, *sin6; 285 struct addrinfo hints, *res; 286 struct sigaction si_sa; 287 int cc, i; 288 int almost_done, ch, hold, packlen, preload, optval, error; 289 int nig_oldmcprefix = -1; 290 u_char *datap; 291 char *e, *target, *ifname = NULL, *gateway = NULL; 292 int ip6optlen = 0; 293 struct cmsghdr *scmsgp = NULL; 294 /* For control (ancillary) data received from recvmsg() */ 295 u_char cm[CONTROLLEN]; 296#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 297 u_long lsockbufsize; 298 int sockbufsize = 0; 299#endif 300 int usepktinfo = 0; 301 struct in6_pktinfo pktinfo; 302 char *cmsg_pktinfo = NULL; 303 struct ip6_rthdr *rthdr = NULL; 304#ifdef IPSEC_POLICY_IPSEC 305 char *policy_in = NULL; 306 char *policy_out = NULL; 307#endif 308 double t; 309 u_long alarmtimeout; 310 size_t rthlen; 311#ifdef IPV6_USE_MIN_MTU 312 int mflag = 0; 313#endif 314#ifndef __HAIKU__ 315 cap_rights_t rights_srecv; 316 cap_rights_t rights_ssend; 317 cap_rights_t rights_stdin; 318#endif 319 320 /* just to be sure */ 321 memset(&smsghdr, 0, sizeof(smsghdr)); 322 memset(&smsgiov, 0, sizeof(smsgiov)); 323 memset(&pktinfo, 0, sizeof(pktinfo)); 324 325 intvl.tv_sec = interval / 1000; 326 intvl.tv_nsec = interval % 1000 * 1000000; 327 328 alarmtimeout = preload = 0; 329 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 330#ifndef __HAIKU__ 331 capdns = capdns_setup(); 332#endif 333 334 while ((ch = getopt(argc, argv, PING6OPTS)) != -1) { 335 switch (ch) { 336 case '.': 337 options |= F_DOT; 338 if (optarg != NULL) { 339 DOT = optarg; 340 DOTlen = strlen(optarg); 341 } 342 break; 343 case '6': 344 /* This option is processed in main(). */ 345 break; 346 case 'k': 347 { 348 char *cp; 349 350 options &= ~F_NOUSERDATA; 351 options |= F_NODEADDR; 352 for (cp = optarg; *cp != '\0'; cp++) { 353 switch (*cp) { 354 case 'a': 355 naflags |= NI_NODEADDR_FLAG_ALL; 356 break; 357 case 'c': 358 case 'C': 359 naflags |= NI_NODEADDR_FLAG_COMPAT; 360 break; 361 case 'l': 362 case 'L': 363 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 364 break; 365 case 's': 366 case 'S': 367 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 368 break; 369 case 'g': 370 case 'G': 371 naflags |= NI_NODEADDR_FLAG_GLOBAL; 372 break; 373 case 'A': /* experimental. not in the spec */ 374#ifdef NI_NODEADDR_FLAG_ANYCAST 375 naflags |= NI_NODEADDR_FLAG_ANYCAST; 376 break; 377#else 378 errx(1, 379"-a A is not supported on the platform"); 380 /*NOTREACHED*/ 381#endif 382 default: 383 usage(); 384 /*NOTREACHED*/ 385 } 386 } 387 break; 388 } 389 case 'b': 390#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 391 errno = 0; 392 e = NULL; 393 lsockbufsize = strtoul(optarg, &e, 10); 394 sockbufsize = (int)lsockbufsize; 395 if (errno || !*optarg || *e || 396 lsockbufsize > INT_MAX) 397 errx(1, "invalid socket buffer size"); 398#else 399 errx(1, 400"-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 401#endif 402 break; 403 case 'C': /* vlan priority code point */ 404 pcp = strtol(optarg, &e, 10); 405 if (*optarg == '\0' || *e != '\0') 406 errx(1, "illegal vlan pcp %s", optarg); 407 if (7 < pcp || pcp < -1) 408 errx(1, "illegal vlan pcp -- %s", optarg); 409 break; 410 case 'c': 411 npackets = strtol(optarg, &e, 10); 412 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 413 errx(1, 414 "illegal number of packets -- %s", optarg); 415 break; 416 case 'D': 417 options |= F_DONTFRAG; 418 break; 419 case 'd': 420 options |= F_SO_DEBUG; 421 break; 422 case 'f': 423 if (getuid()) { 424 errno = EPERM; 425 errx(1, "Must be superuser to flood ping"); 426 } 427 options |= F_FLOOD; 428 options |= F_DOT; 429 setbuf(stdout, (char *)NULL); 430 break; 431 case 'e': 432 gateway = optarg; 433 break; 434 case 'H': 435 options |= F_HOSTNAME; 436 break; 437 case 'm': /* hoplimit */ 438 hoplimit = strtol(optarg, &e, 10); 439 if (*optarg == '\0' || *e != '\0') 440 errx(1, "illegal hoplimit %s", optarg); 441 if (255 < hoplimit || hoplimit < -1) 442 errx(1, 443 "illegal hoplimit -- %s", optarg); 444 break; 445 case 'I': 446 ifname = optarg; 447 options |= F_INTERFACE; 448#ifndef USE_SIN6_SCOPE_ID 449 usepktinfo++; 450#endif 451 break; 452 case 'i': /* wait between sending packets */ 453 t = strtod(optarg, &e); 454 if (*optarg == '\0' || *e != '\0') 455 errx(1, "illegal timing interval %s", optarg); 456 if (t < 1 && getuid()) { 457 errx(1, "%s: only root may use interval < 1s", 458 strerror(EPERM)); 459 } 460 intvl.tv_sec = (time_t)t; 461 intvl.tv_nsec = 462 (long)((t - intvl.tv_sec) * 1000000000); 463 if (intvl.tv_sec < 0) 464 errx(1, "illegal timing interval %s", optarg); 465 /* less than 1/hz does not make sense */ 466 if (intvl.tv_sec == 0 && intvl.tv_nsec < 1000) { 467 warnx("too small interval, raised to .000001"); 468 intvl.tv_nsec = 1000; 469 } 470 options |= F_INTERVAL; 471 break; 472 case 'l': 473 if (getuid()) { 474 errno = EPERM; 475 errx(1, "Must be superuser to preload"); 476 } 477 preload = strtol(optarg, &e, 10); 478 if (preload < 0 || *optarg == '\0' || *e != '\0') 479 errx(1, "illegal preload value -- %s", optarg); 480 break; 481 case 'u': 482#ifdef IPV6_USE_MIN_MTU 483 mflag++; 484 break; 485#else 486 errx(1, "-%c is not supported on this platform", ch); 487 /*NOTREACHED*/ 488#endif 489 case 'n': 490 options &= ~F_HOSTNAME; 491 break; 492 case 'N': 493 options |= F_NIGROUP; 494 nig_oldmcprefix++; 495 break; 496 case 'o': 497 options |= F_ONCE; 498 break; 499 case 'p': /* fill buffer with user pattern */ 500 options |= F_PINGFILLED; 501 fill((char *)datap, optarg); 502 break; 503 case 'q': 504 options |= F_QUIET; 505 break; 506 case 'a': 507 options |= F_AUDIBLE; 508 break; 509 case 'A': 510 options |= F_MISSED; 511 break; 512 case 'S': 513 memset(&hints, 0, sizeof(struct addrinfo)); 514 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ 515 hints.ai_family = AF_INET6; 516 hints.ai_socktype = SOCK_RAW; 517 hints.ai_protocol = IPPROTO_ICMPV6; 518 519#ifdef __HAIKU__ 520#define cap_getaddrinfo(p1,p2,p3,p4,p5) getaddrinfo(p2,p3,p4,p5) 521#endif 522 error = cap_getaddrinfo(capdns, optarg, NULL, &hints, &res); 523 if (error) { 524 errx(1, "invalid source address: %s", 525 gai_strerror(error)); 526 } 527 /* 528 * res->ai_family must be AF_INET6 and res->ai_addrlen 529 * must be sizeof(src). 530 */ 531 memcpy(&src, res->ai_addr, res->ai_addrlen); 532 srclen = res->ai_addrlen; 533 freeaddrinfo(res); 534 options |= F_SRCADDR; 535 break; 536 case 's': /* size of packet to send */ 537 datalen = strtol(optarg, &e, 10); 538 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 539 errx(1, "illegal datalen value -- %s", optarg); 540 if (datalen > MAXDATALEN) { 541 errx(1, 542 "datalen value too large, maximum is %d", 543 MAXDATALEN); 544 } 545 break; 546 case 'O': 547 options &= ~F_NOUSERDATA; 548 options |= F_SUPTYPES; 549 break; 550 case 'v': 551 options |= F_VERBOSE; 552 break; 553 case 'y': 554 options &= ~F_NOUSERDATA; 555 options |= F_FQDN; 556 break; 557 case 'Y': 558 options &= ~F_NOUSERDATA; 559 options |= F_FQDNOLD; 560 break; 561 case 'W': 562 t = strtod(optarg, &e); 563 if (*e || e == optarg || t > (double)INT_MAX) 564 errx(EX_USAGE, "invalid timing interval: `%s'", 565 optarg); 566 options |= F_WAITTIME; 567 waittime = (int)t; 568 break; 569 case 't': 570 alarmtimeout = strtoul(optarg, &e, 0); 571 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 572 errx(EX_USAGE, "invalid timeout: `%s'", 573 optarg); 574 if (alarmtimeout > MAXALARM) 575 errx(EX_USAGE, "invalid timeout: `%s' > %d", 576 optarg, MAXALARM); 577 { 578 struct itimerval itv; 579 580 timerclear(&itv.it_interval); 581 timerclear(&itv.it_value); 582 itv.it_value.tv_sec = (time_t)alarmtimeout; 583 if (setitimer(ITIMER_REAL, &itv, NULL) != 0) 584 err(1, "setitimer"); 585 } 586 break; 587 case 'z': /* traffic class */ 588 tclass = strtol(optarg, &e, 10); 589 if (*optarg == '\0' || *e != '\0') 590 errx(1, "illegal traffic class %s", optarg); 591 if (255 < tclass || tclass < -1) 592 errx(1, 593 "illegal traffic class -- %s", optarg); 594 break; 595#ifdef IPSEC 596#ifdef IPSEC_POLICY_IPSEC 597 case 'P': 598 options |= F_POLICY; 599 if (!strncmp("in", optarg, 2)) { 600 if ((policy_in = strdup(optarg)) == NULL) 601 errx(1, "strdup"); 602 } else if (!strncmp("out", optarg, 3)) { 603 if ((policy_out = strdup(optarg)) == NULL) 604 errx(1, "strdup"); 605 } else 606 errx(1, "invalid security policy"); 607 break; 608#else 609 case 'Z': 610 options |= F_AUTHHDR; 611 break; 612 case 'E': 613 options |= F_ENCRYPT; 614 break; 615#endif /*IPSEC_POLICY_IPSEC*/ 616#endif /*IPSEC*/ 617 default: 618 usage(); 619 /*NOTREACHED*/ 620 } 621 } 622 623 argc -= optind; 624 argv += optind; 625 626 if (argc < 1) { 627 usage(); 628 /*NOTREACHED*/ 629 } 630 631#ifndef __HAIKU__ 632 if (argc > 1) { 633#ifdef IPV6_RECVRTHDR /* 2292bis */ 634 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 635 argc - 1)); 636#else /* RFC2292 */ 637 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 638#endif 639 if (rthlen == 0) { 640 errx(1, "too many intermediate hops"); 641 /*NOTREACHED*/ 642 } 643 ip6optlen += rthlen; 644 } 645#endif 646 647#ifndef __HAIKU__ 648 if (options & F_NIGROUP) { 649 target = nigroup(argv[argc - 1], nig_oldmcprefix); 650 if (target == NULL) { 651 usage(); 652 /*NOTREACHED*/ 653 } 654 } else 655#endif 656 target = argv[argc - 1]; 657 658 /* cap_getaddrinfo */ 659 memset(&hints, 0, sizeof(struct addrinfo)); 660 hints.ai_flags = AI_CANONNAME; 661 hints.ai_family = AF_INET6; 662 hints.ai_socktype = SOCK_RAW; 663 hints.ai_protocol = IPPROTO_ICMPV6; 664 665 error = cap_getaddrinfo(capdns, target, NULL, &hints, &res); 666 if (error) 667 errx(EX_NOHOST, "cannot resolve %s: %s", 668 target, gai_strerror(error)); 669 if (res->ai_canonname) 670 hostname = strdup(res->ai_canonname); 671 else 672 hostname = target; 673 674 if (!res->ai_addr) 675 errx(EX_NOHOST, "cannot resolve %s", target); 676 677 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 678 679 if ((ssend = socket(res->ai_family, res->ai_socktype, 680 res->ai_protocol)) < 0) 681 err(1, "socket ssend"); 682 if ((srecv = socket(res->ai_family, res->ai_socktype, 683 res->ai_protocol)) < 0) 684 err(1, "socket srecv"); 685 freeaddrinfo(res); 686 687 /* set the source address if specified. */ 688 if ((options & F_SRCADDR) != 0) { 689 /* properly fill sin6_scope_id */ 690 if (IN6_IS_ADDR_LINKLOCAL(&src.sin6_addr) && ( 691 IN6_IS_ADDR_LINKLOCAL(&dst.sin6_addr) || 692 IN6_IS_ADDR_MC_LINKLOCAL(&dst.sin6_addr) || 693 IN6_IS_ADDR_MC_NODELOCAL(&dst.sin6_addr))) { 694 if (src.sin6_scope_id == 0) 695 src.sin6_scope_id = dst.sin6_scope_id; 696 if (dst.sin6_scope_id == 0) 697 dst.sin6_scope_id = src.sin6_scope_id; 698 } 699 if (bind(ssend, (struct sockaddr *)&src, srclen) != 0) 700 err(1, "bind"); 701 } 702#ifndef __HAIKU__ 703 /* set the gateway (next hop) if specified */ 704 if (gateway) { 705 memset(&hints, 0, sizeof(hints)); 706 hints.ai_family = AF_INET6; 707 hints.ai_socktype = SOCK_RAW; 708 hints.ai_protocol = IPPROTO_ICMPV6; 709 710 error = cap_getaddrinfo(capdns, gateway, NULL, &hints, &res); 711 if (error) { 712 errx(1, "cap_getaddrinfo for the gateway %s: %s", 713 gateway, gai_strerror(error)); 714 } 715 if (res->ai_next && (options & F_VERBOSE)) 716 warnx("gateway resolves to multiple addresses"); 717 718 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_NEXTHOP, 719 res->ai_addr, res->ai_addrlen)) { 720 err(1, "setsockopt(IPV6_NEXTHOP)"); 721 } 722 723 freeaddrinfo(res); 724 } 725#endif 726 727 /* 728 * let the kernel pass extension headers of incoming packets, 729 * for privileged socket options 730 */ 731 if ((options & F_VERBOSE) != 0) { 732 int opton = 1; 733 734#ifdef IPV6_RECVHOPOPTS 735 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 736 sizeof(opton))) 737 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 738#else /* old adv. API */ 739 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 740 sizeof(opton))) 741 err(1, "setsockopt(IPV6_HOPOPTS)"); 742#endif 743#ifdef IPV6_RECVDSTOPTS 744 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 745 sizeof(opton))) 746 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 747#else /* old adv. API */ 748 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 749 sizeof(opton))) 750 err(1, "setsockopt(IPV6_DSTOPTS)"); 751#endif 752#ifdef IPV6_RECVRTHDRDSTOPTS 753 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 754 sizeof(opton))) 755 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 756#endif 757 } 758 759 /* revoke root privilege */ 760 if (seteuid(getuid()) != 0) 761 err(1, "seteuid() failed"); 762 if (setuid(getuid()) != 0) 763 err(1, "setuid() failed"); 764 765 if ((options & F_FLOOD) && (options & F_INTERVAL)) 766 errx(1, "-f and -i incompatible options"); 767 768 if ((options & F_NOUSERDATA) == 0) { 769 if (datalen >= sizeof(struct tv32)) { 770 /* we can time transfer */ 771 timing = 1; 772 } else 773 timing = 0; 774 /* in F_VERBOSE case, we may get non-echoreply packets*/ 775 if (options & F_VERBOSE) 776 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 777 else 778 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 779 } else { 780 /* suppress timing for node information query */ 781 timing = 0; 782 datalen = 2048; 783 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 784 } 785 786 if (!(packet = (u_char *)malloc((u_int)packlen))) 787 err(1, "Unable to allocate packet"); 788 if (!(options & F_PINGFILLED)) 789 for (i = ICMP6ECHOLEN; i < packlen; ++i) 790 *datap++ = i; 791 792 ident = getpid() & 0xFFFF; 793 arc4random_buf(nonce, sizeof(nonce)); 794 optval = 1; 795#ifndef __HAIKU__ 796 if (options & F_DONTFRAG) 797 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_DONTFRAG, 798 &optval, sizeof(optval)) == -1) 799 err(1, "IPV6_DONTFRAG"); 800#endif 801 hold = 1; 802 803 if (options & F_SO_DEBUG) { 804 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 805 sizeof(hold)); 806 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 807 sizeof(hold)); 808 } 809 optval = IPV6_DEFHLIM; 810 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 811 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 812 &optval, sizeof(optval)) == -1) 813 err(1, "IPV6_MULTICAST_HOPS"); 814#ifdef IPV6_USE_MIN_MTU 815 if (mflag != 1) { 816 optval = mflag > 1 ? 0 : 1; 817 818 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 819 &optval, sizeof(optval)) == -1) 820 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 821 } 822#ifdef IPV6_RECVPATHMTU 823 else { 824 optval = 1; 825 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPATHMTU, 826 &optval, sizeof(optval)) == -1) 827 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 828 } 829#endif /* IPV6_RECVPATHMTU */ 830#endif /* IPV6_USE_MIN_MTU */ 831 832#ifdef IPSEC 833#ifdef IPSEC_POLICY_IPSEC 834 if (options & F_POLICY) { 835 if (setpolicy(srecv, policy_in) < 0) 836 errx(1, "%s", ipsec_strerror()); 837 if (setpolicy(ssend, policy_out) < 0) 838 errx(1, "%s", ipsec_strerror()); 839 } 840#else 841 if (options & F_AUTHHDR) { 842 optval = IPSEC_LEVEL_REQUIRE; 843#ifdef IPV6_AUTH_TRANS_LEVEL 844 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 845 &optval, sizeof(optval)) == -1) 846 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 847 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 848 &optval, sizeof(optval)) == -1) 849 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 850#else /* old def */ 851 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 852 &optval, sizeof(optval)) == -1) 853 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 854 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 855 &optval, sizeof(optval)) == -1) 856 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 857#endif 858 } 859 if (options & F_ENCRYPT) { 860 optval = IPSEC_LEVEL_REQUIRE; 861 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 862 &optval, sizeof(optval)) == -1) 863 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 864 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 865 &optval, sizeof(optval)) == -1) 866 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 867 } 868#endif /*IPSEC_POLICY_IPSEC*/ 869#endif 870 871#ifdef ICMP6_FILTER 872 { 873 struct icmp6_filter filt; 874 if (!(options & F_VERBOSE)) { 875 ICMP6_FILTER_SETBLOCKALL(&filt); 876 if ((options & F_FQDN) || (options & F_FQDNOLD) || 877 (options & F_NODEADDR) || (options & F_SUPTYPES)) 878 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 879 else 880 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 881 } else { 882 ICMP6_FILTER_SETPASSALL(&filt); 883 } 884 if (setsockopt(srecv, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 885 sizeof(filt)) < 0) 886 err(1, "setsockopt(ICMP6_FILTER)"); 887 } 888#endif /*ICMP6_FILTER*/ 889 890 /* let the kernel pass extension headers of incoming packets */ 891 if ((options & F_VERBOSE) != 0) { 892 int opton = 1; 893 894#ifdef IPV6_RECVRTHDR 895 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 896 sizeof(opton))) 897 err(1, "setsockopt(IPV6_RECVRTHDR)"); 898#else /* old adv. API */ 899 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RTHDR, &opton, 900 sizeof(opton))) 901 err(1, "setsockopt(IPV6_RTHDR)"); 902#endif 903 } 904 905/* 906 optval = 1; 907 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 908 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 909 &optval, sizeof(optval)) == -1) 910 err(1, "IPV6_MULTICAST_LOOP"); 911*/ 912 913 /* Specify the outgoing interface and/or the source address */ 914 if (usepktinfo) 915 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 916 917 if (hoplimit != -1) 918 ip6optlen += CMSG_SPACE(sizeof(int)); 919 920 /* set IP6 packet options */ 921 if (ip6optlen) { 922 if ((scmsg = (char *)malloc(ip6optlen)) == NULL) 923 errx(1, "can't allocate enough memory"); 924 smsghdr.msg_control = (caddr_t)scmsg; 925 smsghdr.msg_controllen = ip6optlen; 926 scmsgp = CMSG_FIRSTHDR(&smsghdr); 927 } 928 if (usepktinfo) { 929 cmsg_pktinfo = CMSG_DATA(scmsgp); 930 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 931 scmsgp->cmsg_level = IPPROTO_IPV6; 932 scmsgp->cmsg_type = IPV6_PKTINFO; 933 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 934 } 935 936 /* set the outgoing interface */ 937 if (ifname) { 938#ifndef USE_SIN6_SCOPE_ID 939 /* pktinfo must have already been allocated */ 940 if ((pktinfo.ipi6_ifindex = if_nametoindex(ifname)) == 0) 941 errx(1, "%s: invalid interface name", ifname); 942#else 943 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 944 errx(1, "%s: invalid interface name", ifname); 945#endif 946 } 947 if (hoplimit != -1) { 948 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 949 scmsgp->cmsg_level = IPPROTO_IPV6; 950 scmsgp->cmsg_type = IPV6_HOPLIMIT; 951 memcpy(CMSG_DATA(scmsgp), &hoplimit, sizeof(hoplimit)); 952 953 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 954 } 955 956#ifndef __HAIKU__ 957 if (tclass != -1) { 958 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_TCLASS, 959 &tclass, sizeof(tclass)) == -1) 960 err(1, "setsockopt(IPV6_TCLASS)"); 961 } 962 963 if (pcp != -2) { 964 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_VLAN_PCP, 965 &pcp, sizeof(pcp)) == -1) 966 err(1, "setsockopt(IPV6_VLAN_PCP)"); 967 } 968 969 if (argc > 1) { /* some intermediate addrs are specified */ 970 int hops; 971 int rthdrlen; 972 973 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 974 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 975 scmsgp->cmsg_level = IPPROTO_IPV6; 976 scmsgp->cmsg_type = IPV6_RTHDR; 977 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 978 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 979 IPV6_RTHDR_TYPE_0, argc - 1); 980 if (rthdr == NULL) 981 errx(1, "can't initialize rthdr"); 982 983 for (hops = 0; hops < argc - 1; hops++) { 984 memset(&hints, 0, sizeof(hints)); 985 hints.ai_family = AF_INET6; 986 987 if ((error = cap_getaddrinfo(capdns, argv[hops], NULL, &hints, 988 &res))) 989 errx(1, "%s", gai_strerror(error)); 990 if (res->ai_addr->sa_family != AF_INET6) 991 errx(1, 992 "bad addr family of an intermediate addr"); 993 sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr; 994 if (inet6_rth_add(rthdr, &sin6->sin6_addr)) 995 errx(1, "can't add an intermediate node"); 996 freeaddrinfo(res); 997 } 998 999 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 1000 } 1001#endif 1002 1003 /* From now on we will use only reverse DNS lookups. */ 1004#ifdef WITH_CASPER 1005 if (capdns != NULL) { 1006 const char *types[1]; 1007 1008 types[0] = "ADDR2NAME"; 1009 if (cap_dns_type_limit(capdns, types, nitems(types)) < 0) 1010 err(1, "unable to limit access to system.dns service"); 1011 } 1012#endif 1013 if (!(options & F_SRCADDR)) { 1014 /* 1015 * get the source address. XXX since we revoked the root 1016 * privilege, we cannot use a raw socket for this. 1017 */ 1018 int dummy; 1019 socklen_t len = sizeof(src); 1020 1021 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1022 err(1, "UDP socket"); 1023 1024 src.sin6_family = AF_INET6; 1025 src.sin6_addr = dst.sin6_addr; 1026 src.sin6_port = ntohs(DUMMY_PORT); 1027 src.sin6_scope_id = dst.sin6_scope_id; 1028 1029 if (usepktinfo && 1030 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 1031 (void *)&pktinfo, sizeof(pktinfo))) 1032 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 1033 1034 if (hoplimit != -1 && 1035 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 1036 (void *)&hoplimit, sizeof(hoplimit))) 1037 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); 1038 1039 if (hoplimit != -1 && 1040 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 1041 (void *)&hoplimit, sizeof(hoplimit))) 1042 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); 1043 1044 if (rthdr && 1045 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 1046 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 1047 err(1, "UDP setsockopt(IPV6_RTHDR)"); 1048 1049 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 1050 err(1, "UDP connect"); 1051 1052 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 1053 err(1, "getsockname"); 1054 1055 close(dummy); 1056 } 1057 1058 /* Save pktinfo in the ancillary data. */ 1059 if (usepktinfo) 1060 memcpy(cmsg_pktinfo, &pktinfo, sizeof(pktinfo)); 1061 1062 if (connect(ssend, (struct sockaddr *)&dst, sizeof(dst)) != 0) 1063 err(1, "connect() ssend"); 1064 1065#ifndef __HAIKU__ 1066 caph_cache_catpages(); 1067 if (caph_enter_casper() < 0) 1068 err(1, "caph_enter_casper"); 1069 1070 cap_rights_init(&rights_stdin); 1071 if (caph_rights_limit(STDIN_FILENO, &rights_stdin) < 0) 1072 err(1, "caph_rights_limit stdin"); 1073 if (caph_limit_stdout() < 0) 1074 err(1, "caph_limit_stdout"); 1075 if (caph_limit_stderr() < 0) 1076 err(1, "caph_limit_stderr"); 1077 1078 cap_rights_init(&rights_srecv, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 1079 if (caph_rights_limit(srecv, &rights_srecv) < 0) 1080 err(1, "caph_rights_limit srecv"); 1081 cap_rights_init(&rights_ssend, CAP_SEND, CAP_SETSOCKOPT); 1082 if (caph_rights_limit(ssend, &rights_ssend) < 0) 1083 err(1, "caph_rights_limit ssend"); 1084#endif 1085 1086#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 1087 if (sockbufsize) { 1088 if (datalen > (size_t)sockbufsize) 1089 warnx("you need -b to increase socket buffer size"); 1090 if (setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 1091 sizeof(sockbufsize)) < 0) 1092 err(1, "setsockopt(SO_SNDBUF)"); 1093 if (setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 1094 sizeof(sockbufsize)) < 0) 1095 err(1, "setsockopt(SO_RCVBUF)"); 1096 } 1097 else { 1098 if (datalen > 8 * 1024) /*XXX*/ 1099 warnx("you need -b to increase socket buffer size"); 1100 /* 1101 * When pinging the broadcast address, you can get a lot of 1102 * answers. Doing something so evil is useful if you are trying 1103 * to stress the ethernet, or just want to fill the arp cache 1104 * to get some stuff for /etc/ethers. 1105 */ 1106 hold = 48 * 1024; 1107 setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 1108 sizeof(hold)); 1109 } 1110#endif 1111 1112 optval = 1; 1113#ifndef USE_SIN6_SCOPE_ID 1114#ifdef IPV6_RECVPKTINFO 1115 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 1116 sizeof(optval)) < 0) 1117 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 1118#else /* old adv. API */ 1119 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 1120 sizeof(optval)) < 0) 1121 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 1122#endif 1123#endif /* USE_SIN6_SCOPE_ID */ 1124#ifdef IPV6_RECVHOPLIMIT 1125 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 1126 sizeof(optval)) < 0) 1127 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 1128#else /* old adv. API */ 1129 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 1130 sizeof(optval)) < 0) 1131 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 1132#endif 1133 1134#ifndef __HAIKU__ 1135 cap_rights_clear(&rights_srecv, CAP_SETSOCKOPT); 1136 if (caph_rights_limit(srecv, &rights_srecv) < 0) 1137 err(1, "caph_rights_limit srecv setsockopt"); 1138 cap_rights_clear(&rights_ssend, CAP_SETSOCKOPT); 1139 if (caph_rights_limit(ssend, &rights_ssend) < 0) 1140 err(1, "caph_rights_limit ssend setsockopt"); 1141#endif 1142 1143 printf("PING(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 1144 (unsigned long)(pingerlen() - 8)); 1145 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 1146 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 1147 1148 if (preload == 0) 1149 pinger(); 1150 else { 1151 if (npackets != 0 && preload > npackets) 1152 preload = npackets; 1153 while (preload--) 1154 pinger(); 1155 } 1156 clock_gettime(CLOCK_MONOTONIC, &last); 1157 1158 sigemptyset(&si_sa.sa_mask); 1159 si_sa.sa_flags = 0; 1160 si_sa.sa_handler = onsignal; 1161 if (sigaction(SIGINT, &si_sa, 0) == -1) 1162 err(EX_OSERR, "sigaction SIGINT"); 1163 seenint = 0; 1164#ifndef __HAIKU__ 1165 if (sigaction(SIGINFO, &si_sa, 0) == -1) 1166 err(EX_OSERR, "sigaction SIGINFO"); 1167 seeninfo = 0; 1168#endif 1169 if (alarmtimeout > 0) { 1170 if (sigaction(SIGALRM, &si_sa, 0) == -1) 1171 err(EX_OSERR, "sigaction SIGALRM"); 1172 } 1173 if (options & F_FLOOD) { 1174 intvl.tv_sec = 0; 1175 intvl.tv_nsec = 10000000; 1176 } 1177 1178 almost_done = 0; 1179 while (seenint == 0) { 1180 struct timespec now, timeout; 1181 struct msghdr m; 1182 struct iovec iov[2]; 1183 fd_set rfds; 1184 int n; 1185 1186 /* signal handling */ 1187 if (seeninfo) { 1188 pr_summary(stderr); 1189 seeninfo = 0; 1190 continue; 1191 } 1192 FD_ZERO(&rfds); 1193 FD_SET(srecv, &rfds); 1194 clock_gettime(CLOCK_MONOTONIC, &now); 1195 timespecadd(&last, &intvl, &timeout); 1196 timespecsub(&timeout, &now, &timeout); 1197 if (timeout.tv_sec < 0) 1198 timespecclear(&timeout); 1199 1200 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 1201 if (n < 0) 1202 continue; /* EINTR */ 1203 if (n == 1) { 1204 m.msg_name = (caddr_t)&from; 1205 m.msg_namelen = sizeof(from); 1206 memset(&iov, 0, sizeof(iov)); 1207 iov[0].iov_base = (caddr_t)packet; 1208 iov[0].iov_len = packlen; 1209 m.msg_iov = iov; 1210 m.msg_iovlen = 1; 1211 memset(cm, 0, CONTROLLEN); 1212 m.msg_control = (void *)cm; 1213 m.msg_controllen = CONTROLLEN; 1214 1215 cc = recvmsg(srecv, &m, 0); 1216 if (cc < 0) { 1217 if (errno != EINTR) { 1218 warn("recvmsg"); 1219 sleep(1); 1220 } 1221 continue; 1222 } else if (cc == 0) { 1223 int mtu; 1224 1225 /* 1226 * receive control messages only. Process the 1227 * exceptions (currently the only possibility is 1228 * a path MTU notification.) 1229 */ 1230 if ((mtu = get_pathmtu(&m)) > 0) { 1231 if ((options & F_VERBOSE) != 0) { 1232 printf("new path MTU (%d) is " 1233 "notified\n", mtu); 1234 } 1235 } 1236 continue; 1237 } else { 1238 /* 1239 * an ICMPv6 message (probably an echoreply) 1240 * arrived. 1241 */ 1242 pr_pack(packet, cc, &m); 1243 } 1244 if (((options & F_ONCE) != 0 && nreceived > 0) || 1245 (npackets > 0 && nreceived >= npackets)) 1246 break; 1247 } 1248 if (n == 0 || (options & F_FLOOD)) { 1249 if (npackets == 0 || ntransmitted < npackets) 1250 pinger(); 1251 else { 1252 if (almost_done) 1253 break; 1254 almost_done = 1; 1255 /* 1256 * If we're not transmitting any more packets, 1257 * change the timer to wait two round-trip times 1258 * if we've received any packets or (waittime) 1259 * milliseconds if we haven't. 1260 */ 1261 intvl.tv_nsec = 0; 1262 if (nreceived) { 1263 intvl.tv_sec = 2 * tmax / 1000; 1264 if (intvl.tv_sec == 0) 1265 intvl.tv_sec = 1; 1266 } else { 1267 intvl.tv_sec = waittime / 1000; 1268 intvl.tv_nsec = 1269 waittime % 1000 * 1000000; 1270 } 1271 } 1272 clock_gettime(CLOCK_MONOTONIC, &last); 1273 if (ntransmitted - nreceived - 1 > nmissedmax) { 1274 nmissedmax = ntransmitted - nreceived - 1; 1275 if (options & F_MISSED) 1276 (void)write(STDOUT_FILENO, &BBELL, 1); 1277 } 1278 } 1279 } 1280 sigemptyset(&si_sa.sa_mask); 1281 si_sa.sa_flags = 0; 1282 si_sa.sa_handler = SIG_IGN; 1283 sigaction(SIGINT, &si_sa, 0); 1284 sigaction(SIGALRM, &si_sa, 0); 1285 pr_summary(stdout); 1286 1287 if(packet != NULL) 1288 free(packet); 1289 1290 if (nreceived > 0) 1291 exit(0); 1292 else if (ntransmitted > ntransmitfailures) 1293 exit(2); 1294 else 1295 exit(EX_OSERR); 1296} 1297 1298/* 1299 * pinger -- 1300 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1301 * will be added on by the kernel. The ID field is our UNIX process ID, 1302 * and the sequence number is an ascending integer. The first 8 bytes 1303 * of the data portion are used to hold a UNIX "timespec" struct in VAX 1304 * byte-order, to compute the round-trip time. 1305 */ 1306static size_t 1307pingerlen(void) 1308{ 1309 size_t l; 1310 1311 if (options & F_FQDN) 1312 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1313 else if (options & F_FQDNOLD) 1314 l = ICMP6_NIQLEN; 1315 else if (options & F_NODEADDR) 1316 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1317 else if (options & F_SUPTYPES) 1318 l = ICMP6_NIQLEN; 1319 else 1320 l = ICMP6ECHOLEN + datalen; 1321 1322 return l; 1323} 1324 1325static int 1326pinger(void) 1327{ 1328 struct icmp6_hdr *icp; 1329 struct iovec iov[2]; 1330 int i, cc; 1331 struct icmp6_nodeinfo *nip; 1332 uint16_t seq; 1333 1334 if (npackets && ntransmitted >= npackets) 1335 return(-1); /* no more transmission */ 1336 1337 icp = (struct icmp6_hdr *)outpack; 1338 nip = (struct icmp6_nodeinfo *)outpack; 1339 memset(icp, 0, sizeof(*icp)); 1340 icp->icmp6_cksum = 0; 1341 seq = ntransmitted++; 1342 CLR(seq % mx_dup_ck); 1343 1344 if (options & F_FQDN) { 1345 uint16_t s; 1346 1347 icp->icmp6_type = ICMP6_NI_QUERY; 1348 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1349 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1350 nip->ni_flags = htons(0); 1351 1352 memcpy(nip->icmp6_ni_nonce, nonce, 1353 sizeof(nip->icmp6_ni_nonce)); 1354 s = htons(seq); 1355 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1356 1357 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1358 sizeof(dst.sin6_addr)); 1359 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1360 datalen = 0; 1361 } else if (options & F_FQDNOLD) { 1362 uint16_t s; 1363 /* packet format in 03 draft - no Subject data on queries */ 1364 icp->icmp6_type = ICMP6_NI_QUERY; 1365 icp->icmp6_code = 0; /* code field is always 0 */ 1366 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1367 nip->ni_flags = htons(0); 1368 1369 memcpy(nip->icmp6_ni_nonce, nonce, 1370 sizeof(nip->icmp6_ni_nonce)); 1371 s = htons(seq); 1372 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1373 1374 cc = ICMP6_NIQLEN; 1375 datalen = 0; 1376 } else if (options & F_NODEADDR) { 1377 uint16_t s; 1378 1379 icp->icmp6_type = ICMP6_NI_QUERY; 1380 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1381 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1382 nip->ni_flags = naflags; 1383 1384 memcpy(nip->icmp6_ni_nonce, nonce, 1385 sizeof(nip->icmp6_ni_nonce)); 1386 s = htons(seq); 1387 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1388 1389 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1390 sizeof(dst.sin6_addr)); 1391 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1392 datalen = 0; 1393 } else if (options & F_SUPTYPES) { 1394 uint16_t s; 1395 1396 icp->icmp6_type = ICMP6_NI_QUERY; 1397 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1398 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1399 /* we support compressed bitmap */ 1400 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1401 1402 memcpy(nip->icmp6_ni_nonce, nonce, 1403 sizeof(nip->icmp6_ni_nonce)); 1404 s = htons(seq); 1405 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1406 1407 cc = ICMP6_NIQLEN; 1408 datalen = 0; 1409 } else { 1410 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1411 icp->icmp6_code = 0; 1412 icp->icmp6_id = htons(ident); 1413 icp->icmp6_seq = htons(seq); 1414 if (timing) { 1415 struct timespec tv; 1416 struct tv32 tv32; 1417 (void)clock_gettime(CLOCK_MONOTONIC, &tv); 1418 /* 1419 * Truncate seconds down to 32 bits in order 1420 * to fit the timestamp within 8 bytes of the 1421 * packet. We're only concerned with 1422 * durations, not absolute times. 1423 */ 1424 tv32.tv32_sec = (uint32_t)htonl(tv.tv_sec); 1425 tv32.tv32_nsec = (uint32_t)htonl(tv.tv_nsec); 1426 memcpy(&outpack[ICMP6ECHOLEN], &tv32, sizeof(tv32)); 1427 } 1428 cc = ICMP6ECHOLEN + datalen; 1429 } 1430 1431#ifdef DIAGNOSTIC 1432 if (pingerlen() != cc) 1433 errx(1, "internal error; length mismatch"); 1434#endif 1435 1436 memset(&iov, 0, sizeof(iov)); 1437 iov[0].iov_base = (caddr_t)outpack; 1438 iov[0].iov_len = cc; 1439 smsghdr.msg_iov = iov; 1440 smsghdr.msg_iovlen = 1; 1441 1442 i = sendmsg(ssend, &smsghdr, 0); 1443 1444 if (i < 0 || i != cc) { 1445 if (i < 0) { 1446 ntransmitfailures++; 1447 warn("sendmsg"); 1448 } 1449 (void)printf("ping: wrote %s %d chars, ret=%d\n", 1450 hostname, cc, i); 1451 } 1452 if (!(options & F_QUIET) && options & F_DOT) 1453 (void)write(STDOUT_FILENO, &DOT[DOTidx++ % DOTlen], 1); 1454 1455 return(0); 1456} 1457 1458static int 1459myechoreply(const struct icmp6_hdr *icp) 1460{ 1461 if (ntohs(icp->icmp6_id) == ident) 1462 return 1; 1463 else 1464 return 0; 1465} 1466 1467static int 1468mynireply(const struct icmp6_nodeinfo *nip) 1469{ 1470 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1471 nonce + sizeof(u_int16_t), 1472 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1473 return 1; 1474 else 1475 return 0; 1476} 1477 1478/* 1479 * Decode a name from a DNS message. 1480 * 1481 * Format of the message is described in RFC 1035 subsection 4.1.4. 1482 * 1483 * Arguments: 1484 * sp - Pointer to a DNS pointer octet or to the first octet of a label 1485 * in the message. 1486 * ep - Pointer to the end of the message (one step past the last octet). 1487 * base - Pointer to the beginning of the message. 1488 * buf - Buffer into which the decoded name will be saved. 1489 * bufsiz - Size of the buffer 'buf'. 1490 * 1491 * Return value: 1492 * Pointer to an octet immediately following the ending zero octet 1493 * of the decoded label, or NULL if an error occurred. 1494 */ 1495static const char * 1496dnsdecode(const u_char *sp, const u_char *ep, const u_char *base, char *buf, 1497 size_t bufsiz) 1498{ 1499 int i; 1500 const u_char *cp; 1501 char cresult[MAXDNAME + 1]; 1502 const u_char *comp; 1503 int l; 1504 1505 cp = sp; 1506 *buf = '\0'; 1507 1508 if (cp >= ep) 1509 return NULL; 1510 while (cp < ep) { 1511 i = *cp; 1512 if (i == 0 || cp != sp) { 1513 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz) 1514 return NULL; /*result overrun*/ 1515 } 1516 if (i == 0) 1517 break; 1518 cp++; 1519 1520 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1521 /* DNS compression */ 1522 if (!base) 1523 return NULL; 1524 1525 comp = base + (i & 0x3f); 1526 if (dnsdecode(comp, cp, base, cresult, 1527 sizeof(cresult)) == NULL) 1528 return NULL; 1529 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1530 return NULL; /*result overrun*/ 1531 break; 1532 } else if ((i & 0x3f) == i) { 1533 if (i > ep - cp) 1534 return NULL; /*source overrun*/ 1535 while (i-- > 0 && cp < ep) { 1536 l = snprintf(cresult, sizeof(cresult), 1537 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1538 if ((size_t)l >= sizeof(cresult) || l < 0) 1539 return NULL; 1540 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1541 return NULL; /*result overrun*/ 1542 cp++; 1543 } 1544 } else 1545 return NULL; /*invalid label*/ 1546 } 1547 if (i != 0) 1548 return NULL; /*not terminated*/ 1549 cp++; 1550 return cp; 1551} 1552 1553/* 1554 * pr_pack -- 1555 * Print out the packet, if it came from us. This logic is necessary 1556 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1557 * which arrive ('tis only fair). This permits multiple copies of this 1558 * program to be run without having intermingled output (or statistics!). 1559 */ 1560static void 1561pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1562{ 1563#define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1564 struct icmp6_hdr *icp; 1565 struct icmp6_nodeinfo *ni; 1566 int i; 1567 int hoplim; 1568 struct sockaddr *from; 1569 int fromlen; 1570 const u_char *cp = NULL; 1571 u_char *dp, *end = buf + cc; 1572 struct in6_pktinfo *pktinfo = NULL; 1573 struct timespec tv, tp; 1574 struct tv32 tpp; 1575 double triptime = 0; 1576 int dupflag; 1577 size_t off; 1578 int oldfqdn; 1579 u_int16_t seq; 1580 char dnsname[MAXDNAME + 1]; 1581 1582 (void)clock_gettime(CLOCK_MONOTONIC, &tv); 1583 1584 if (!mhdr || !mhdr->msg_name || 1585 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1586 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1587 if (options & F_VERBOSE) 1588 warnx("invalid peername"); 1589 return; 1590 } 1591 from = (struct sockaddr *)mhdr->msg_name; 1592 fromlen = mhdr->msg_namelen; 1593 if (cc < (int)sizeof(struct icmp6_hdr)) { 1594 if (options & F_VERBOSE) 1595 warnx("packet too short (%d bytes) from %s", cc, 1596 pr_addr(from, fromlen)); 1597 return; 1598 } 1599 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) && 1600 (options & F_VERBOSE) != 0) 1601 warnx("some control data discarded, insufficient buffer size"); 1602 icp = (struct icmp6_hdr *)buf; 1603 ni = (struct icmp6_nodeinfo *)buf; 1604 off = 0; 1605 1606 if ((hoplim = get_hoplim(mhdr)) == -1) { 1607 warnx("failed to get receiving hop limit"); 1608 return; 1609 } 1610 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1611 warnx("failed to get receiving packet information"); 1612 return; 1613 } 1614 1615 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1616 seq = ntohs(icp->icmp6_seq); 1617 ++nreceived; 1618 if (timing) { 1619 memcpy(&tpp, icp + 1, sizeof(tpp)); 1620 tp.tv_sec = ntohl(tpp.tv32_sec); 1621 tp.tv_nsec = ntohl(tpp.tv32_nsec); 1622 timespecsub(&tv, &tp, &tv); 1623 triptime = ((double)tv.tv_sec) * 1000.0 + 1624 ((double)tv.tv_nsec) / 1000000.0; 1625 tsum += triptime; 1626 tsumsq += triptime * triptime; 1627 if (triptime < tmin) 1628 tmin = triptime; 1629 if (triptime > tmax) 1630 tmax = triptime; 1631 } 1632 1633 if (TST(seq % mx_dup_ck)) { 1634 ++nrepeats; 1635 --nreceived; 1636 dupflag = 1; 1637 } else { 1638 SET(seq % mx_dup_ck); 1639 dupflag = 0; 1640 } 1641 1642 if (options & F_QUIET) 1643 return; 1644 1645 if (options & F_WAITTIME && triptime > waittime) { 1646 ++nrcvtimeout; 1647 return; 1648 } 1649 1650 if (options & F_DOT) 1651 (void)write(STDOUT_FILENO, &BSPACE, 1); 1652 else { 1653 if (options & F_AUDIBLE) 1654 (void)write(STDOUT_FILENO, &BBELL, 1); 1655 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1656 pr_addr(from, fromlen), seq); 1657 (void)printf(" hlim=%d", hoplim); 1658 if ((options & F_VERBOSE) != 0) { 1659 struct sockaddr_in6 dstsa; 1660 1661 memset(&dstsa, 0, sizeof(dstsa)); 1662 dstsa.sin6_family = AF_INET6; 1663 dstsa.sin6_len = sizeof(dstsa); 1664 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1665 dstsa.sin6_addr = pktinfo->ipi6_addr; 1666 (void)printf(" dst=%s", 1667 pr_addr((struct sockaddr *)&dstsa, 1668 sizeof(dstsa))); 1669 } 1670 if (timing) 1671 (void)printf(" time=%.3f ms", triptime); 1672 if (dupflag) 1673 (void)printf("(DUP!)"); 1674 /* check the data */ 1675 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1676 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1677 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1678 if (*cp != *dp) { 1679 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1680 break; 1681 } 1682 } 1683 } 1684 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1685 memcpy(&seq, ni->icmp6_ni_nonce, sizeof(seq)); 1686 seq = ntohs(seq); 1687 ++nreceived; 1688 if (TST(seq % mx_dup_ck)) { 1689 ++nrepeats; 1690 --nreceived; 1691 dupflag = 1; 1692 } else { 1693 SET(seq % mx_dup_ck); 1694 dupflag = 0; 1695 } 1696 1697 if (options & F_QUIET) 1698 return; 1699 1700 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1701 1702 switch (ntohs(ni->ni_code)) { 1703 case ICMP6_NI_SUCCESS: 1704 break; 1705 case ICMP6_NI_REFUSED: 1706 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1707 goto fqdnend; 1708 case ICMP6_NI_UNKNOWN: 1709 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1710 goto fqdnend; 1711 default: 1712 printf("unknown code 0x%x, type 0x%x", 1713 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1714 goto fqdnend; 1715 } 1716 1717 switch (ntohs(ni->ni_qtype)) { 1718 case NI_QTYPE_NOOP: 1719 printf("NodeInfo NOOP"); 1720 break; 1721 case NI_QTYPE_SUPTYPES: 1722 pr_suptypes(ni, end - (u_char *)ni); 1723 break; 1724 case NI_QTYPE_NODEADDR: 1725 pr_nodeaddr(ni, end - (u_char *)ni); 1726 break; 1727 case NI_QTYPE_FQDN: 1728 default: /* XXX: for backward compatibility */ 1729 cp = (u_char *)ni + ICMP6_NIRLEN; 1730 if (buf[off + ICMP6_NIRLEN] == 1731 cc - off - ICMP6_NIRLEN - 1) 1732 oldfqdn = 1; 1733 else 1734 oldfqdn = 0; 1735 if (oldfqdn) { 1736 cp++; /* skip length */ 1737 while (cp < end) { 1738 safeputc(*cp & 0xff); 1739 cp++; 1740 } 1741 } else { 1742 i = 0; 1743 while (cp < end) { 1744 cp = dnsdecode((const u_char *)cp, end, 1745 (const u_char *)(ni + 1), dnsname, 1746 sizeof(dnsname)); 1747 if (cp == NULL) { 1748 printf("???"); 1749 break; 1750 } 1751 /* 1752 * name-lookup special handling for 1753 * truncated name 1754 */ 1755 if (cp + 1 <= end && !*cp && 1756 strlen(dnsname) > 0) { 1757 dnsname[strlen(dnsname) - 1] = '\0'; 1758 cp++; 1759 } 1760 printf("%s%s", i > 0 ? "," : "", 1761 dnsname); 1762 } 1763 } 1764 if (options & F_VERBOSE) { 1765 u_long t; 1766 int32_t ttl; 1767 int comma = 0; 1768 1769 (void)printf(" ("); /*)*/ 1770 1771 switch (ni->ni_code) { 1772 case ICMP6_NI_REFUSED: 1773 (void)printf("refused"); 1774 comma++; 1775 break; 1776 case ICMP6_NI_UNKNOWN: 1777 (void)printf("unknown qtype"); 1778 comma++; 1779 break; 1780 } 1781 1782 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1783 /* case of refusion, unknown */ 1784 /*(*/ 1785 putchar(')'); 1786 goto fqdnend; 1787 } 1788 memcpy(&t, &buf[off+ICMP6ECHOLEN+8], sizeof(t)); 1789 ttl = (int32_t)ntohl(t); 1790 if (comma) 1791 printf(","); 1792 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1793 (void)printf("TTL=%d:meaningless", 1794 (int)ttl); 1795 } else { 1796 if (ttl < 0) { 1797 (void)printf("TTL=%d:invalid", 1798 ttl); 1799 } else 1800 (void)printf("TTL=%d", ttl); 1801 } 1802 comma++; 1803 1804 if (oldfqdn) { 1805 if (comma) 1806 printf(","); 1807 printf("03 draft"); 1808 comma++; 1809 } else { 1810 cp = (u_char *)ni + ICMP6_NIRLEN; 1811 if (cp == end) { 1812 if (comma) 1813 printf(","); 1814 printf("no name"); 1815 comma++; 1816 } 1817 } 1818 1819 if (buf[off + ICMP6_NIRLEN] != 1820 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1821 if (comma) 1822 printf(","); 1823 (void)printf("invalid namelen:%d/%lu", 1824 buf[off + ICMP6_NIRLEN], 1825 (u_long)cc - off - ICMP6_NIRLEN - 1); 1826 comma++; 1827 } 1828 /*(*/ 1829 putchar(')'); 1830 } 1831 fqdnend: 1832 ; 1833 } 1834 } else { 1835 /* We've got something other than an ECHOREPLY */ 1836 if (!(options & F_VERBOSE)) 1837 return; 1838 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1839 pr_icmph(icp, end); 1840 } 1841 1842 if (!(options & F_DOT)) { 1843 (void)putchar('\n'); 1844 if (options & F_VERBOSE) 1845 pr_exthdrs(mhdr); 1846 (void)fflush(stdout); 1847 } 1848#undef safeputc 1849} 1850 1851static void 1852pr_exthdrs(struct msghdr *mhdr) 1853{ 1854 ssize_t bufsize; 1855 void *bufp; 1856 struct cmsghdr *cm; 1857 1858 bufsize = 0; 1859 bufp = mhdr->msg_control; 1860 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1861 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1862 if (cm->cmsg_level != IPPROTO_IPV6) 1863 continue; 1864 1865 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp); 1866 if (bufsize <= 0) 1867 continue; 1868 switch (cm->cmsg_type) { 1869 case IPV6_HOPOPTS: 1870 printf(" HbH Options: "); 1871 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1872 break; 1873 case IPV6_DSTOPTS: 1874#ifdef IPV6_RTHDRDSTOPTS 1875 case IPV6_RTHDRDSTOPTS: 1876#endif 1877 printf(" Dst Options: "); 1878 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1879 break; 1880 case IPV6_RTHDR: 1881 printf(" Routing: "); 1882 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize); 1883 break; 1884 } 1885 } 1886} 1887 1888#ifndef __HAIKU__ 1889static void 1890pr_ip6opt(void *extbuf, size_t bufsize) 1891{ 1892 struct ip6_hbh *ext; 1893 int currentlen; 1894 u_int8_t type; 1895 socklen_t extlen, len; 1896 void *databuf; 1897 size_t offset; 1898 u_int16_t value2; 1899 u_int32_t value4; 1900 1901 ext = (struct ip6_hbh *)extbuf; 1902 extlen = (ext->ip6h_len + 1) * 8; 1903 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1904 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1905 1906 /* 1907 * Bounds checking on the ancillary data buffer: 1908 * subtract the size of a cmsg structure from the buffer size. 1909 */ 1910 if (bufsize < (extlen + CMSG_SPACE(0))) { 1911 extlen = bufsize - CMSG_SPACE(0); 1912 warnx("options truncated, showing only %u (total=%u)", 1913 (unsigned int)(extlen / 8 - 1), 1914 (unsigned int)(ext->ip6h_len)); 1915 } 1916 1917 currentlen = 0; 1918 while (1) { 1919 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1920 &type, &len, &databuf); 1921 if (currentlen == -1) 1922 break; 1923 switch (type) { 1924 /* 1925 * Note that inet6_opt_next automatically skips any padding 1926 * optins. 1927 */ 1928 case IP6OPT_JUMBO: 1929 offset = 0; 1930 offset = inet6_opt_get_val(databuf, offset, 1931 &value4, sizeof(value4)); 1932 printf(" Jumbo Payload Opt: Length %u\n", 1933 (u_int32_t)ntohl(value4)); 1934 break; 1935 case IP6OPT_ROUTER_ALERT: 1936 offset = 0; 1937 offset = inet6_opt_get_val(databuf, offset, 1938 &value2, sizeof(value2)); 1939 printf(" Router Alert Opt: Type %u\n", 1940 ntohs(value2)); 1941 break; 1942 default: 1943 printf(" Received Opt %u len %lu\n", 1944 type, (unsigned long)len); 1945 break; 1946 } 1947 } 1948 return; 1949} 1950#else 1951static void 1952pr_ip6opt(void *extbuf, size_t bufsize) 1953{ 1954 putchar('\n'); 1955 return; 1956} 1957#endif 1958 1959#ifndef __HAIKU__ 1960static void 1961pr_rthdr(void *extbuf, size_t bufsize) 1962{ 1963 struct in6_addr *in6; 1964 char ntopbuf[INET6_ADDRSTRLEN]; 1965 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1966 int i, segments, origsegs, rthsize, size0, size1; 1967 1968 /* print fixed part of the header */ 1969 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1970 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1971 if ((segments = inet6_rth_segments(extbuf)) >= 0) { 1972 printf("%d segments, ", segments); 1973 printf("%d left\n", rh->ip6r_segleft); 1974 } else { 1975 printf("segments unknown, "); 1976 printf("%d left\n", rh->ip6r_segleft); 1977 return; 1978 } 1979 1980 /* 1981 * Bounds checking on the ancillary data buffer. When calculating 1982 * the number of items to show keep in mind: 1983 * - The size of the cmsg structure 1984 * - The size of one segment (the size of a Type 0 routing header) 1985 * - When dividing add a fudge factor of one in case the 1986 * dividend is not evenly divisible by the divisor 1987 */ 1988 rthsize = (rh->ip6r_len + 1) * 8; 1989 if (bufsize < (rthsize + CMSG_SPACE(0))) { 1990 origsegs = segments; 1991 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0); 1992 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1); 1993 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) / 1994 (size1 - size0) + 1; 1995 warnx("segments truncated, showing only %d (total=%d)", 1996 segments, origsegs); 1997 } 1998 1999 for (i = 0; i < segments; i++) { 2000 in6 = inet6_rth_getaddr(extbuf, i); 2001 if (in6 == NULL) 2002 printf(" [%d]<NULL>\n", i); 2003 else { 2004 if (!inet_ntop(AF_INET6, in6, ntopbuf, 2005 sizeof(ntopbuf))) 2006 strlcpy(ntopbuf, "?", sizeof(ntopbuf)); 2007 printf(" [%d]%s\n", i, ntopbuf); 2008 } 2009 } 2010 2011 return; 2012 2013} 2014#else 2015static void 2016pr_rthdr(void *extbuf, size_t bufsize) 2017{ 2018 putchar('\n'); 2019 return; 2020} 2021#endif 2022 2023static int 2024pr_bitrange(u_int32_t v, int soff, int ii) 2025{ 2026 int off; 2027 int i; 2028 2029 off = 0; 2030 while (off < 32) { 2031 /* shift till we have 0x01 */ 2032 if ((v & 0x01) == 0) { 2033 if (ii > 1) 2034 printf("-%u", soff + off - 1); 2035 ii = 0; 2036 switch (v & 0x0f) { 2037 case 0x00: 2038 v >>= 4; 2039 off += 4; 2040 continue; 2041 case 0x08: 2042 v >>= 3; 2043 off += 3; 2044 continue; 2045 case 0x04: case 0x0c: 2046 v >>= 2; 2047 off += 2; 2048 continue; 2049 default: 2050 v >>= 1; 2051 off += 1; 2052 continue; 2053 } 2054 } 2055 2056 /* we have 0x01 with us */ 2057 for (i = 0; i < 32 - off; i++) { 2058 if ((v & (0x01 << i)) == 0) 2059 break; 2060 } 2061 if (!ii) 2062 printf(" %u", soff + off); 2063 ii += i; 2064 v >>= i; off += i; 2065 } 2066 return ii; 2067} 2068 2069static void 2070pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 2071 /* ni->qtype must be SUPTYPES */ 2072{ 2073 size_t clen; 2074 u_int32_t v; 2075 const u_char *cp, *end; 2076 u_int16_t cur; 2077 struct cbit { 2078 u_int16_t words; /*32bit count*/ 2079 u_int16_t skip; 2080 } cbit; 2081#define MAXQTYPES (1 << 16) 2082 size_t off; 2083 int b; 2084 2085 cp = (u_char *)(ni + 1); 2086 end = ((u_char *)ni) + nilen; 2087 cur = 0; 2088 b = 0; 2089 2090 printf("NodeInfo Supported Qtypes"); 2091 if (options & F_VERBOSE) { 2092 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 2093 printf(", compressed bitmap"); 2094 else 2095 printf(", raw bitmap"); 2096 } 2097 2098 while (cp < end) { 2099 clen = (size_t)(end - cp); 2100 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 2101 if (clen == 0 || clen > MAXQTYPES / 8 || 2102 clen % sizeof(v)) { 2103 printf("???"); 2104 return; 2105 } 2106 } else { 2107 if (clen < sizeof(cbit) || clen % sizeof(v)) 2108 return; 2109 memcpy(&cbit, cp, sizeof(cbit)); 2110 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 2111 clen) 2112 return; 2113 cp += sizeof(cbit); 2114 clen = ntohs(cbit.words) * sizeof(v); 2115 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 2116 MAXQTYPES) 2117 return; 2118 } 2119 2120 for (off = 0; off < clen; off += sizeof(v)) { 2121 memcpy(&v, cp + off, sizeof(v)); 2122 v = (u_int32_t)ntohl(v); 2123 b = pr_bitrange(v, (int)(cur + off * 8), b); 2124 } 2125 /* flush the remaining bits */ 2126 b = pr_bitrange(0, (int)(cur + off * 8), b); 2127 2128 cp += clen; 2129 cur += clen * 8; 2130 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 2131 cur += ntohs(cbit.skip) * 32; 2132 } 2133} 2134 2135static void 2136pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 2137 /* ni->qtype must be NODEADDR */ 2138{ 2139 u_char *cp = (u_char *)(ni + 1); 2140 char ntop_buf[INET6_ADDRSTRLEN]; 2141 int withttl = 0; 2142 2143 nilen -= sizeof(struct icmp6_nodeinfo); 2144 2145 if (options & F_VERBOSE) { 2146 switch (ni->ni_code) { 2147 case ICMP6_NI_REFUSED: 2148 (void)printf("refused"); 2149 break; 2150 case ICMP6_NI_UNKNOWN: 2151 (void)printf("unknown qtype"); 2152 break; 2153 } 2154 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 2155 (void)printf(" truncated"); 2156 } 2157 putchar('\n'); 2158 if (nilen <= 0) 2159 printf(" no address\n"); 2160 2161 /* 2162 * In icmp-name-lookups 05 and later, TTL of each returned address 2163 * is contained in the response. We try to detect the version 2164 * by the length of the data, but note that the detection algorithm 2165 * is incomplete. We assume the latest draft by default. 2166 */ 2167 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 2168 withttl = 1; 2169 while (nilen > 0) { 2170 u_int32_t ttl = 0; 2171 2172 if (withttl) { 2173 uint32_t t; 2174 2175 memcpy(&t, cp, sizeof(t)); 2176 ttl = (u_int32_t)ntohl(t); 2177 cp += sizeof(u_int32_t); 2178 nilen -= sizeof(u_int32_t); 2179 } 2180 2181 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 2182 NULL) 2183 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2184 printf(" %s", ntop_buf); 2185 if (withttl) { 2186 if (ttl == 0xffffffff) { 2187 /* 2188 * XXX: can this convention be applied to all 2189 * type of TTL (i.e. non-ND TTL)? 2190 */ 2191 printf("(TTL=infty)"); 2192 } 2193 else 2194 printf("(TTL=%u)", ttl); 2195 } 2196 putchar('\n'); 2197 2198 nilen -= sizeof(struct in6_addr); 2199 cp += sizeof(struct in6_addr); 2200 } 2201} 2202 2203static int 2204get_hoplim(struct msghdr *mhdr) 2205{ 2206 struct cmsghdr *cm; 2207 2208 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2209 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2210 if (cm->cmsg_len == 0) 2211 return(-1); 2212 2213 if (cm->cmsg_level == IPPROTO_IPV6 && 2214 cm->cmsg_type == IPV6_HOPLIMIT && 2215 cm->cmsg_len == CMSG_LEN(sizeof(int))) { 2216 int r; 2217 2218 memcpy(&r, CMSG_DATA(cm), sizeof(r)); 2219 return(r); 2220 } 2221 } 2222 2223 return(-1); 2224} 2225 2226static struct in6_pktinfo * 2227get_rcvpktinfo(struct msghdr *mhdr) 2228{ 2229 static struct in6_pktinfo pi; 2230 struct cmsghdr *cm; 2231 2232 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2233 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2234 if (cm->cmsg_len == 0) 2235 return(NULL); 2236 2237 if (cm->cmsg_level == IPPROTO_IPV6 && 2238 cm->cmsg_type == IPV6_PKTINFO && 2239 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) { 2240 memcpy(&pi, CMSG_DATA(cm), sizeof(pi)); 2241 return(&pi); 2242 } 2243 } 2244 2245 return(NULL); 2246} 2247 2248static int 2249get_pathmtu(struct msghdr *mhdr) 2250{ 2251#ifdef IPV6_RECVPATHMTU 2252 struct cmsghdr *cm; 2253 struct ip6_mtuinfo mtuctl; 2254 2255 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2256 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2257 if (cm->cmsg_len == 0) 2258 return(0); 2259 2260 if (cm->cmsg_level == IPPROTO_IPV6 && 2261 cm->cmsg_type == IPV6_PATHMTU && 2262 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2263 memcpy(&mtuctl, CMSG_DATA(cm), sizeof(mtuctl)); 2264 2265 /* 2266 * If the notified destination is different from 2267 * the one we are pinging, just ignore the info. 2268 * We check the scope ID only when both notified value 2269 * and our own value have non-0 values, because we may 2270 * have used the default scope zone ID for sending, 2271 * in which case the scope ID value is 0. 2272 */ 2273 if (!IN6_ARE_ADDR_EQUAL(&mtuctl.ip6m_addr.sin6_addr, 2274 &dst.sin6_addr) || 2275 (mtuctl.ip6m_addr.sin6_scope_id && 2276 dst.sin6_scope_id && 2277 mtuctl.ip6m_addr.sin6_scope_id != 2278 dst.sin6_scope_id)) { 2279 if ((options & F_VERBOSE) != 0) { 2280 printf("path MTU for %s is notified. " 2281 "(ignored)\n", 2282 pr_addr((struct sockaddr *)&mtuctl.ip6m_addr, 2283 sizeof(mtuctl.ip6m_addr))); 2284 } 2285 return(0); 2286 } 2287 2288 /* 2289 * Ignore an invalid MTU. XXX: can we just believe 2290 * the kernel check? 2291 */ 2292 if (mtuctl.ip6m_mtu < IPV6_MMTU) 2293 return(0); 2294 2295 /* notification for our destination. return the MTU. */ 2296 return((int)mtuctl.ip6m_mtu); 2297 } 2298 } 2299#endif 2300 return(0); 2301} 2302 2303/*subject type*/ 2304static const char *niqcode[] = { 2305 "IPv6 address", 2306 "DNS label", /*or empty*/ 2307 "IPv4 address", 2308}; 2309 2310/*result code*/ 2311static const char *nircode[] = { 2312 "Success", "Refused", "Unknown", 2313}; 2314 2315 2316/* 2317 * pr_icmph -- 2318 * Print a descriptive string about an ICMP header. 2319 */ 2320static void 2321pr_icmph(struct icmp6_hdr *icp, u_char *end) 2322{ 2323 char ntop_buf[INET6_ADDRSTRLEN]; 2324 struct nd_redirect *red; 2325 struct icmp6_nodeinfo *ni; 2326 char dnsname[MAXDNAME + 1]; 2327 const u_char *cp; 2328 size_t l; 2329 2330 switch (icp->icmp6_type) { 2331 case ICMP6_DST_UNREACH: 2332 switch (icp->icmp6_code) { 2333 case ICMP6_DST_UNREACH_NOROUTE: 2334 (void)printf("No Route to Destination\n"); 2335 break; 2336 case ICMP6_DST_UNREACH_ADMIN: 2337 (void)printf("Destination Administratively " 2338 "Unreachable\n"); 2339 break; 2340 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2341 (void)printf("Destination Unreachable Beyond Scope\n"); 2342 break; 2343 case ICMP6_DST_UNREACH_ADDR: 2344 (void)printf("Destination Host Unreachable\n"); 2345 break; 2346 case ICMP6_DST_UNREACH_NOPORT: 2347 (void)printf("Destination Port Unreachable\n"); 2348 break; 2349 default: 2350 (void)printf("Destination Unreachable, Bad Code: %d\n", 2351 icp->icmp6_code); 2352 break; 2353 } 2354 /* Print returned IP header information */ 2355 pr_retip((struct ip6_hdr *)(icp + 1), end); 2356 break; 2357 case ICMP6_PACKET_TOO_BIG: 2358 (void)printf("Packet too big mtu = %d\n", 2359 (int)ntohl(icp->icmp6_mtu)); 2360 pr_retip((struct ip6_hdr *)(icp + 1), end); 2361 break; 2362 case ICMP6_TIME_EXCEEDED: 2363 switch (icp->icmp6_code) { 2364 case ICMP6_TIME_EXCEED_TRANSIT: 2365 (void)printf("Time to live exceeded\n"); 2366 break; 2367 case ICMP6_TIME_EXCEED_REASSEMBLY: 2368 (void)printf("Frag reassembly time exceeded\n"); 2369 break; 2370 default: 2371 (void)printf("Time exceeded, Bad Code: %d\n", 2372 icp->icmp6_code); 2373 break; 2374 } 2375 pr_retip((struct ip6_hdr *)(icp + 1), end); 2376 break; 2377 case ICMP6_PARAM_PROB: 2378 (void)printf("Parameter problem: "); 2379 switch (icp->icmp6_code) { 2380 case ICMP6_PARAMPROB_HEADER: 2381 (void)printf("Erroneous Header "); 2382 break; 2383 case ICMP6_PARAMPROB_NEXTHEADER: 2384 (void)printf("Unknown Nextheader "); 2385 break; 2386 case ICMP6_PARAMPROB_OPTION: 2387 (void)printf("Unrecognized Option "); 2388 break; 2389 default: 2390 (void)printf("Bad code(%d) ", icp->icmp6_code); 2391 break; 2392 } 2393 (void)printf("pointer = 0x%02x\n", 2394 (u_int32_t)ntohl(icp->icmp6_pptr)); 2395 pr_retip((struct ip6_hdr *)(icp + 1), end); 2396 break; 2397 case ICMP6_ECHO_REQUEST: 2398 (void)printf("Echo Request"); 2399 /* XXX ID + Seq + Data */ 2400 break; 2401 case ICMP6_ECHO_REPLY: 2402 (void)printf("Echo Reply"); 2403 /* XXX ID + Seq + Data */ 2404 break; 2405 case ICMP6_MEMBERSHIP_QUERY: 2406 (void)printf("Listener Query"); 2407 break; 2408 case ICMP6_MEMBERSHIP_REPORT: 2409 (void)printf("Listener Report"); 2410 break; 2411 case ICMP6_MEMBERSHIP_REDUCTION: 2412 (void)printf("Listener Done"); 2413 break; 2414 case ND_ROUTER_SOLICIT: 2415 (void)printf("Router Solicitation"); 2416 break; 2417 case ND_ROUTER_ADVERT: 2418 (void)printf("Router Advertisement"); 2419 break; 2420 case ND_NEIGHBOR_SOLICIT: 2421 (void)printf("Neighbor Solicitation"); 2422 break; 2423 case ND_NEIGHBOR_ADVERT: 2424 (void)printf("Neighbor Advertisement"); 2425 break; 2426 case ND_REDIRECT: 2427 red = (struct nd_redirect *)icp; 2428 (void)printf("Redirect\n"); 2429 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2430 sizeof(ntop_buf))) 2431 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2432 (void)printf("Destination: %s", ntop_buf); 2433 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2434 sizeof(ntop_buf))) 2435 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2436 (void)printf(" New Target: %s", ntop_buf); 2437 break; 2438 case ICMP6_NI_QUERY: 2439 (void)printf("Node Information Query"); 2440 /* XXX ID + Seq + Data */ 2441 ni = (struct icmp6_nodeinfo *)icp; 2442 l = end - (u_char *)(ni + 1); 2443 printf(", "); 2444 switch (ntohs(ni->ni_qtype)) { 2445 case NI_QTYPE_NOOP: 2446 (void)printf("NOOP"); 2447 break; 2448 case NI_QTYPE_SUPTYPES: 2449 (void)printf("Supported qtypes"); 2450 break; 2451 case NI_QTYPE_FQDN: 2452 (void)printf("DNS name"); 2453 break; 2454 case NI_QTYPE_NODEADDR: 2455 (void)printf("nodeaddr"); 2456 break; 2457 case NI_QTYPE_IPV4ADDR: 2458 (void)printf("IPv4 nodeaddr"); 2459 break; 2460 default: 2461 (void)printf("unknown qtype"); 2462 break; 2463 } 2464 if (options & F_VERBOSE) { 2465 switch (ni->ni_code) { 2466 case ICMP6_NI_SUBJ_IPV6: 2467 if (l == sizeof(struct in6_addr) && 2468 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2469 sizeof(ntop_buf)) != NULL) { 2470 (void)printf(", subject=%s(%s)", 2471 niqcode[ni->ni_code], ntop_buf); 2472 } else { 2473#if 1 2474 /* backward compat to -W */ 2475 (void)printf(", oldfqdn"); 2476#else 2477 (void)printf(", invalid"); 2478#endif 2479 } 2480 break; 2481 case ICMP6_NI_SUBJ_FQDN: 2482 if (end == (u_char *)(ni + 1)) { 2483 (void)printf(", no subject"); 2484 break; 2485 } 2486 printf(", subject=%s", niqcode[ni->ni_code]); 2487 cp = (const u_char *)(ni + 1); 2488 cp = dnsdecode(cp, end, NULL, dnsname, 2489 sizeof(dnsname)); 2490 if (cp != NULL) 2491 printf("(%s)", dnsname); 2492 else 2493 printf("(invalid)"); 2494 break; 2495 case ICMP6_NI_SUBJ_IPV4: 2496 if (l == sizeof(struct in_addr) && 2497 inet_ntop(AF_INET, ni + 1, ntop_buf, 2498 sizeof(ntop_buf)) != NULL) { 2499 (void)printf(", subject=%s(%s)", 2500 niqcode[ni->ni_code], ntop_buf); 2501 } else 2502 (void)printf(", invalid"); 2503 break; 2504 default: 2505 (void)printf(", invalid"); 2506 break; 2507 } 2508 } 2509 break; 2510 case ICMP6_NI_REPLY: 2511 (void)printf("Node Information Reply"); 2512 /* XXX ID + Seq + Data */ 2513 ni = (struct icmp6_nodeinfo *)icp; 2514 printf(", "); 2515 switch (ntohs(ni->ni_qtype)) { 2516 case NI_QTYPE_NOOP: 2517 (void)printf("NOOP"); 2518 break; 2519 case NI_QTYPE_SUPTYPES: 2520 (void)printf("Supported qtypes"); 2521 break; 2522 case NI_QTYPE_FQDN: 2523 (void)printf("DNS name"); 2524 break; 2525 case NI_QTYPE_NODEADDR: 2526 (void)printf("nodeaddr"); 2527 break; 2528 case NI_QTYPE_IPV4ADDR: 2529 (void)printf("IPv4 nodeaddr"); 2530 break; 2531 default: 2532 (void)printf("unknown qtype"); 2533 break; 2534 } 2535 if (options & F_VERBOSE) { 2536 if (ni->ni_code > nitems(nircode)) 2537 printf(", invalid"); 2538 else 2539 printf(", %s", nircode[ni->ni_code]); 2540 } 2541 break; 2542 default: 2543 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2544 } 2545} 2546 2547/* 2548 * pr_iph -- 2549 * Print an IP6 header. 2550 */ 2551static void 2552pr_iph(struct ip6_hdr *ip6) 2553{ 2554 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2555 u_int8_t tc; 2556 char ntop_buf[INET6_ADDRSTRLEN]; 2557 2558 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2559 tc = (tc >> 4) & 0x0f; 2560 tc |= (ip6->ip6_vfc << 4); 2561 2562 printf("Vr TC Flow Plen Nxt Hlim\n"); 2563 printf(" %1x %02x %05x %04x %02x %02x\n", 2564 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2565 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2566 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2567 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2568 printf("%s->", ntop_buf); 2569 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2570 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2571 printf("%s\n", ntop_buf); 2572} 2573 2574/* 2575 * pr_addr -- 2576 * Return an ascii host address as a dotted quad and optionally with 2577 * a hostname. 2578 */ 2579static const char * 2580pr_addr(struct sockaddr *addr, int addrlen) 2581{ 2582 static char buf[NI_MAXHOST]; 2583 int flag = 0; 2584 2585 if (!(options & F_HOSTNAME)) 2586 flag |= NI_NUMERICHOST; 2587 2588#ifdef __HAIKU__ 2589#define cap_getnameinfo(p1,p2,p3,p4,p5,p6,p7,p8) getnameinfo(p2,p3,p4,p5,p6,p7,p8) 2590#endif 2591 if (cap_getnameinfo(capdns, addr, addrlen, buf, sizeof(buf), NULL, 0, 2592 flag) == 0) 2593 return (buf); 2594 else 2595 return "?"; 2596} 2597 2598/* 2599 * pr_retip -- 2600 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2601 */ 2602static void 2603pr_retip(struct ip6_hdr *ip6, u_char *end) 2604{ 2605 u_char *cp = (u_char *)ip6, nh; 2606 int hlen; 2607 2608 if ((size_t)(end - (u_char *)ip6) < sizeof(*ip6)) { 2609 printf("IP6"); 2610 goto trunc; 2611 } 2612 pr_iph(ip6); 2613 hlen = sizeof(*ip6); 2614 2615 nh = ip6->ip6_nxt; 2616 cp += hlen; 2617 while (end - cp >= 8) { 2618#ifdef IPSEC 2619 struct ah ah; 2620#endif 2621 2622 switch (nh) { 2623 case IPPROTO_HOPOPTS: 2624 printf("HBH "); 2625 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2626 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2627 break; 2628 case IPPROTO_DSTOPTS: 2629 printf("DSTOPT "); 2630 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2631 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2632 break; 2633 case IPPROTO_FRAGMENT: 2634 printf("FRAG "); 2635 hlen = sizeof(struct ip6_frag); 2636 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2637 break; 2638 case IPPROTO_ROUTING: 2639 printf("RTHDR "); 2640 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2641 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2642 break; 2643#ifdef IPSEC 2644 case IPPROTO_AH: 2645 printf("AH "); 2646 memcpy(&ah, cp, sizeof(ah)); 2647 hlen = (ah.ah_len+2) << 2; 2648 nh = ah.ah_nxt; 2649 break; 2650#endif 2651 case IPPROTO_ICMPV6: 2652 printf("ICMP6: type = %d, code = %d\n", 2653 *cp, *(cp + 1)); 2654 return; 2655 case IPPROTO_ESP: 2656 printf("ESP\n"); 2657 return; 2658 case IPPROTO_TCP: 2659 printf("TCP: from port %u, to port %u (decimal)\n", 2660 (*cp * 256 + *(cp + 1)), 2661 (*(cp + 2) * 256 + *(cp + 3))); 2662 return; 2663 case IPPROTO_UDP: 2664 printf("UDP: from port %u, to port %u (decimal)\n", 2665 (*cp * 256 + *(cp + 1)), 2666 (*(cp + 2) * 256 + *(cp + 3))); 2667 return; 2668 default: 2669 printf("Unknown Header(%d)\n", nh); 2670 return; 2671 } 2672 2673 if ((cp += hlen) >= end) 2674 goto trunc; 2675 } 2676 if (end - cp < 8) 2677 goto trunc; 2678 2679 putchar('\n'); 2680 return; 2681 2682 trunc: 2683 printf("...\n"); 2684 return; 2685} 2686 2687static void 2688fill(char *bp, char *patp) 2689{ 2690 int ii, jj, kk; 2691 int pat[16]; 2692 char *cp; 2693 2694 for (cp = patp; *cp; cp++) 2695 if (!isxdigit(*cp)) 2696 errx(1, "patterns must be specified as hex digits"); 2697 ii = sscanf(patp, 2698 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2699 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2700 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2701 &pat[13], &pat[14], &pat[15]); 2702 2703/* xxx */ 2704 if (ii > 0) 2705 for (kk = 0; 2706 (size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + ii; 2707 kk += ii) 2708 for (jj = 0; jj < ii; ++jj) 2709 bp[jj + kk] = pat[jj]; 2710 if (!(options & F_QUIET)) { 2711 (void)printf("PATTERN: 0x"); 2712 for (jj = 0; jj < ii; ++jj) 2713 (void)printf("%02x", bp[jj] & 0xFF); 2714 (void)printf("\n"); 2715 } 2716} 2717 2718#ifdef IPSEC 2719#ifdef IPSEC_POLICY_IPSEC 2720static int 2721setpolicy(int so __unused, char *policy) 2722{ 2723 char *buf; 2724 2725 if (policy == NULL) 2726 return 0; /* ignore */ 2727 2728 buf = ipsec_set_policy(policy, strlen(policy)); 2729 if (buf == NULL) 2730 errx(1, "%s", ipsec_strerror()); 2731 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2732 ipsec_get_policylen(buf)) < 0) 2733 warnx("Unable to set IPsec policy"); 2734 free(buf); 2735 2736 return 0; 2737} 2738#endif 2739#endif 2740 2741#ifndef __HAIKU__ 2742static char * 2743nigroup(char *name, int nig_oldmcprefix) 2744{ 2745 char *p; 2746 char *q; 2747 MD5_CTX ctxt; 2748 u_int8_t digest[16]; 2749 u_int8_t c; 2750 size_t l; 2751 char hbuf[NI_MAXHOST]; 2752 struct in6_addr in6; 2753 int valid; 2754 2755 p = strchr(name, '.'); 2756 if (!p) 2757 p = name + strlen(name); 2758 l = p - name; 2759 if (l > 63 || l > sizeof(hbuf) - 1) 2760 return NULL; /*label too long*/ 2761 strncpy(hbuf, name, l); 2762 hbuf[(int)l] = '\0'; 2763 2764 for (q = name; *q; q++) { 2765 if (isupper(*(unsigned char *)q)) 2766 *q = tolower(*(unsigned char *)q); 2767 } 2768 2769 /* generate 16 bytes of pseudo-random value. */ 2770 memset(&ctxt, 0, sizeof(ctxt)); 2771 MD5Init(&ctxt); 2772 c = l & 0xff; 2773 MD5Update(&ctxt, &c, sizeof(c)); 2774 MD5Update(&ctxt, (unsigned char *)name, l); 2775 MD5Final(digest, &ctxt); 2776 2777 if (nig_oldmcprefix) { 2778 /* draft-ietf-ipngwg-icmp-name-lookup */ 2779 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6); 2780 } else { 2781 /* RFC 4620 */ 2782 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6); 2783 } 2784 if (valid != 1) 2785 return NULL; /*XXX*/ 2786 2787 if (nig_oldmcprefix) { 2788 /* draft-ietf-ipngwg-icmp-name-lookup */ 2789 bcopy(digest, &in6.s6_addr[12], 4); 2790 } else { 2791 /* RFC 4620 */ 2792 bcopy(digest, &in6.s6_addr[13], 3); 2793 } 2794 2795 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2796 return NULL; 2797 2798 return strdup(hbuf); 2799} 2800#endif 2801 2802#ifndef __HAIKU__ 2803static cap_channel_t * 2804capdns_setup(void) 2805{ 2806 cap_channel_t *capcas, *capdnsloc; 2807#ifdef WITH_CASPER 2808 const char *types[2]; 2809 int families[1]; 2810#endif 2811 capcas = cap_init(); 2812 if (capcas == NULL) 2813 err(1, "unable to create casper process"); 2814 capdnsloc = cap_service_open(capcas, "system.dns"); 2815 /* Casper capability no longer needed. */ 2816 cap_close(capcas); 2817 if (capdnsloc == NULL) 2818 err(1, "unable to open system.dns service"); 2819#ifdef WITH_CASPER 2820 types[0] = "NAME2ADDR"; 2821 types[1] = "ADDR2NAME"; 2822 if (cap_dns_type_limit(capdnsloc, types, nitems(types)) < 0) 2823 err(1, "unable to limit access to system.dns service"); 2824 families[0] = AF_INET6; 2825 if (cap_dns_family_limit(capdnsloc, families, nitems(families)) < 0) 2826 err(1, "unable to limit access to system.dns service"); 2827#endif 2828 return (capdnsloc); 2829} 2830#endif 2831