ping6.c revision 285820
1/* $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */ 2 3/* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32/* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */ 33 34/* 35 * Copyright (c) 1989, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * This code is derived from software contributed to Berkeley by 39 * Mike Muuss. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 */ 65 66#ifndef lint 67static const char copyright[] = 68"@(#) Copyright (c) 1989, 1993\n\ 69 The Regents of the University of California. All rights reserved.\n"; 70#endif /* not lint */ 71 72#ifndef lint 73#if 0 74static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 75#endif 76#endif /* not lint */ 77 78#include <sys/cdefs.h> 79__FBSDID("$FreeBSD: stable/10/sbin/ping6/ping6.c 285820 2015-07-23 19:52:03Z hrs $"); 80 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/uio.h> 106#include <sys/socket.h> 107#include <sys/time.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 <ctype.h> 120#include <err.h> 121#include <errno.h> 122#include <fcntl.h> 123#include <math.h> 124#include <signal.h> 125#include <stdio.h> 126#include <stdlib.h> 127#include <string.h> 128#include <sysexits.h> 129#include <unistd.h> 130 131#ifdef IPSEC 132#include <netipsec/ah.h> 133#include <netipsec/ipsec.h> 134#endif 135 136#include <md5.h> 137 138struct tv32 { 139 u_int32_t tv32_sec; 140 u_int32_t tv32_usec; 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_HOSTNAME 0x10000 184#define F_FQDNOLD 0x20000 185#define F_NIGROUP 0x40000 186#define F_SUPTYPES 0x80000 187#define F_NOMINMTU 0x100000 188#define F_ONCE 0x200000 189#define F_AUDIBLE 0x400000 190#define F_MISSED 0x800000 191#define F_DONTFRAG 0x1000000 192#define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 193#define F_WAITTIME 0x2000000 194u_int options; 195 196#define IN6LEN sizeof(struct in6_addr) 197#define SA6LEN sizeof(struct sockaddr_in6) 198#define DUMMY_PORT 10101 199 200#define SIN6(s) ((struct sockaddr_in6 *)(s)) 201 202/* 203 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 204 * number of received sequence numbers we can keep track of. Change 128 205 * to 8192 for complete accuracy... 206 */ 207#define MAX_DUP_CHK (8 * 8192) 208int mx_dup_ck = MAX_DUP_CHK; 209char rcvd_tbl[MAX_DUP_CHK / 8]; 210 211struct sockaddr_in6 dst; /* who to ping6 */ 212struct sockaddr_in6 src; /* src addr of this packet */ 213socklen_t srclen; 214int datalen = DEFDATALEN; 215int s; /* socket file descriptor */ 216u_char outpack[MAXPACKETLEN]; 217char BSPACE = '\b'; /* characters written for flood */ 218char BBELL = '\a'; /* characters written for AUDIBLE */ 219char DOT = '.'; 220char *hostname; 221int ident; /* process id to identify our packets */ 222u_int8_t nonce[8]; /* nonce field for node information */ 223int hoplimit = -1; /* hoplimit */ 224int pathmtu = 0; /* path MTU for the destination. 0 = unspec. */ 225u_char *packet = NULL; 226 227/* counters */ 228long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 229long npackets; /* max packets to transmit */ 230long nreceived; /* # of packets we got back */ 231long nrepeats; /* number of duplicates */ 232long ntransmitted; /* sequence # for outbound packets = #sent */ 233int interval = 1000; /* interval between packets in ms */ 234int waittime = MAXWAIT; /* timeout for each packet */ 235long nrcvtimeout = 0; /* # of packets we got back after waittime */ 236 237/* timing */ 238int timing; /* flag to do timing */ 239double tmin = 999999999.0; /* minimum round trip time */ 240double tmax = 0.0; /* maximum round trip time */ 241double tsum = 0.0; /* sum of all times, for doing average */ 242double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 243 244/* for node addresses */ 245u_short naflags; 246 247/* for ancillary data(advanced API) */ 248struct msghdr smsghdr; 249struct iovec smsgiov; 250char *scmsg = 0; 251 252volatile sig_atomic_t seenint; 253#ifdef SIGINFO 254volatile sig_atomic_t seeninfo; 255#endif 256 257int main(int, char *[]); 258void fill(char *, char *); 259int get_hoplim(struct msghdr *); 260int get_pathmtu(struct msghdr *); 261struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); 262void onsignal(int); 263void onint(int); 264size_t pingerlen(void); 265int pinger(void); 266const char *pr_addr(struct sockaddr *, int); 267void pr_icmph(struct icmp6_hdr *, u_char *); 268void pr_iph(struct ip6_hdr *); 269void pr_suptypes(struct icmp6_nodeinfo *, size_t); 270void pr_nodeaddr(struct icmp6_nodeinfo *, int); 271int myechoreply(const struct icmp6_hdr *); 272int mynireply(const struct icmp6_nodeinfo *); 273char *dnsdecode(const u_char **, const u_char *, const u_char *, 274 char *, size_t); 275void pr_pack(u_char *, int, struct msghdr *); 276void pr_exthdrs(struct msghdr *); 277void pr_ip6opt(void *, size_t); 278void pr_rthdr(void *, size_t); 279int pr_bitrange(u_int32_t, int, int); 280void pr_retip(struct ip6_hdr *, u_char *); 281void summary(void); 282void tvsub(struct timeval *, struct timeval *); 283int setpolicy(int, char *); 284char *nigroup(char *, int); 285void usage(void); 286 287int 288main(int argc, char *argv[]) 289{ 290 struct timeval last, intvl; 291 struct sockaddr_in6 from, *sin6; 292#ifndef HAVE_ARC4RANDOM 293 struct timeval seed; 294#endif 295 struct addrinfo hints, *res; 296 struct sigaction si_sa; 297 int cc, i; 298 int almost_done, ch, hold, packlen, preload, optval, error; 299 int nig_oldmcprefix = -1; 300 u_char *datap; 301 char *e, *target, *ifname = NULL, *gateway = NULL; 302 int ip6optlen = 0; 303 struct cmsghdr *scmsgp = NULL; 304 /* For control (ancillary) data received from recvmsg() */ 305 struct cmsghdr cm[CONTROLLEN]; 306#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 307 u_long lsockbufsize; 308 int sockbufsize = 0; 309#endif 310 int usepktinfo = 0; 311 struct in6_pktinfo *pktinfo = NULL; 312#ifdef USE_RFC2292BIS 313 struct ip6_rthdr *rthdr = NULL; 314#endif 315#ifdef IPSEC_POLICY_IPSEC 316 char *policy_in = NULL; 317 char *policy_out = NULL; 318#endif 319 double t; 320 u_long alarmtimeout; 321 size_t rthlen; 322#ifdef IPV6_USE_MIN_MTU 323 int mflag = 0; 324#endif 325 326 /* just to be sure */ 327 memset(&smsghdr, 0, sizeof(smsghdr)); 328 memset(&smsgiov, 0, sizeof(smsgiov)); 329 330 alarmtimeout = preload = 0; 331 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 332#ifndef IPSEC 333#define ADDOPTS 334#else 335#ifdef IPSEC_POLICY_IPSEC 336#define ADDOPTS "P:" 337#else 338#define ADDOPTS "AE" 339#endif /*IPSEC_POLICY_IPSEC*/ 340#endif 341 while ((ch = getopt(argc, argv, 342 "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) { 343#undef ADDOPTS 344 switch (ch) { 345 case 'a': 346 { 347 char *cp; 348 349 options &= ~F_NOUSERDATA; 350 options |= F_NODEADDR; 351 for (cp = optarg; *cp != '\0'; cp++) { 352 switch (*cp) { 353 case 'a': 354 naflags |= NI_NODEADDR_FLAG_ALL; 355 break; 356 case 'c': 357 case 'C': 358 naflags |= NI_NODEADDR_FLAG_COMPAT; 359 break; 360 case 'l': 361 case 'L': 362 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 363 break; 364 case 's': 365 case 'S': 366 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 367 break; 368 case 'g': 369 case 'G': 370 naflags |= NI_NODEADDR_FLAG_GLOBAL; 371 break; 372 case 'A': /* experimental. not in the spec */ 373#ifdef NI_NODEADDR_FLAG_ANYCAST 374 naflags |= NI_NODEADDR_FLAG_ANYCAST; 375 break; 376#else 377 errx(1, 378"-a A is not supported on the platform"); 379 /*NOTREACHED*/ 380#endif 381 default: 382 usage(); 383 /*NOTREACHED*/ 384 } 385 } 386 break; 387 } 388 case 'b': 389#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 390 errno = 0; 391 e = NULL; 392 lsockbufsize = strtoul(optarg, &e, 10); 393 sockbufsize = lsockbufsize; 394 if (errno || !*optarg || *e || 395 sockbufsize != lsockbufsize) 396 errx(1, "invalid socket buffer size"); 397#else 398 errx(1, 399"-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 400#endif 401 break; 402 case 'c': 403 npackets = strtol(optarg, &e, 10); 404 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 405 errx(1, 406 "illegal number of packets -- %s", optarg); 407 break; 408 case 'D': 409 options |= F_DONTFRAG; 410 break; 411 case 'd': 412 options |= F_SO_DEBUG; 413 break; 414 case 'f': 415 if (getuid()) { 416 errno = EPERM; 417 errx(1, "Must be superuser to flood ping"); 418 } 419 options |= F_FLOOD; 420 setbuf(stdout, (char *)NULL); 421 break; 422 case 'g': 423 gateway = optarg; 424 break; 425 case 'H': 426 options |= F_HOSTNAME; 427 break; 428 case 'h': /* hoplimit */ 429 hoplimit = strtol(optarg, &e, 10); 430 if (*optarg == '\0' || *e != '\0') 431 errx(1, "illegal hoplimit %s", optarg); 432 if (255 < hoplimit || hoplimit < -1) 433 errx(1, 434 "illegal hoplimit -- %s", optarg); 435 break; 436 case 'I': 437 ifname = optarg; 438 options |= F_INTERFACE; 439#ifndef USE_SIN6_SCOPE_ID 440 usepktinfo++; 441#endif 442 break; 443 case 'i': /* wait between sending packets */ 444 t = strtod(optarg, &e); 445 if (*optarg == '\0' || *e != '\0') 446 errx(1, "illegal timing interval %s", optarg); 447 if (t < 1 && getuid()) { 448 errx(1, "%s: only root may use interval < 1s", 449 strerror(EPERM)); 450 } 451 intvl.tv_sec = (long)t; 452 intvl.tv_usec = 453 (long)((t - intvl.tv_sec) * 1000000); 454 if (intvl.tv_sec < 0) 455 errx(1, "illegal timing interval %s", optarg); 456 /* less than 1/hz does not make sense */ 457 if (intvl.tv_sec == 0 && intvl.tv_usec < 1) { 458 warnx("too small interval, raised to .000001"); 459 intvl.tv_usec = 1; 460 } 461 options |= F_INTERVAL; 462 break; 463 case 'l': 464 if (getuid()) { 465 errno = EPERM; 466 errx(1, "Must be superuser to preload"); 467 } 468 preload = strtol(optarg, &e, 10); 469 if (preload < 0 || *optarg == '\0' || *e != '\0') 470 errx(1, "illegal preload value -- %s", optarg); 471 break; 472 case 'm': 473#ifdef IPV6_USE_MIN_MTU 474 mflag++; 475 break; 476#else 477 errx(1, "-%c is not supported on this platform", ch); 478 /*NOTREACHED*/ 479#endif 480 case 'n': 481 options &= ~F_HOSTNAME; 482 break; 483 case 'N': 484 options |= F_NIGROUP; 485 nig_oldmcprefix++; 486 break; 487 case 'o': 488 options |= F_ONCE; 489 break; 490 case 'p': /* fill buffer with user pattern */ 491 options |= F_PINGFILLED; 492 fill((char *)datap, optarg); 493 break; 494 case 'q': 495 options |= F_QUIET; 496 break; 497 case 'r': 498 options |= F_AUDIBLE; 499 break; 500 case 'R': 501 options |= F_MISSED; 502 break; 503 case 'S': 504 memset(&hints, 0, sizeof(struct addrinfo)); 505 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ 506 hints.ai_family = AF_INET6; 507 hints.ai_socktype = SOCK_RAW; 508 hints.ai_protocol = IPPROTO_ICMPV6; 509 510 error = getaddrinfo(optarg, NULL, &hints, &res); 511 if (error) { 512 errx(1, "invalid source address: %s", 513 gai_strerror(error)); 514 } 515 /* 516 * res->ai_family must be AF_INET6 and res->ai_addrlen 517 * must be sizeof(src). 518 */ 519 memcpy(&src, res->ai_addr, res->ai_addrlen); 520 srclen = res->ai_addrlen; 521 freeaddrinfo(res); 522 res = NULL; 523 options |= F_SRCADDR; 524 break; 525 case 's': /* size of packet to send */ 526 datalen = strtol(optarg, &e, 10); 527 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 528 errx(1, "illegal datalen value -- %s", optarg); 529 if (datalen > MAXDATALEN) { 530 errx(1, 531 "datalen value too large, maximum is %d", 532 MAXDATALEN); 533 } 534 break; 535 case 't': 536 options &= ~F_NOUSERDATA; 537 options |= F_SUPTYPES; 538 break; 539 case 'v': 540 options |= F_VERBOSE; 541 break; 542 case 'w': 543 options &= ~F_NOUSERDATA; 544 options |= F_FQDN; 545 break; 546 case 'W': 547 options &= ~F_NOUSERDATA; 548 options |= F_FQDNOLD; 549 break; 550 case 'x': 551 t = strtod(optarg, &e); 552 if (*e || e == optarg || t > (double)INT_MAX) 553 err(EX_USAGE, "invalid timing interval: `%s'", 554 optarg); 555 options |= F_WAITTIME; 556 waittime = (int)t; 557 break; 558 case 'X': 559 alarmtimeout = strtoul(optarg, &e, 0); 560 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 561 errx(EX_USAGE, "invalid timeout: `%s'", 562 optarg); 563 if (alarmtimeout > MAXALARM) 564 errx(EX_USAGE, "invalid timeout: `%s' > %d", 565 optarg, MAXALARM); 566 alarm((int)alarmtimeout); 567 break; 568#ifdef IPSEC 569#ifdef IPSEC_POLICY_IPSEC 570 case 'P': 571 options |= F_POLICY; 572 if (!strncmp("in", optarg, 2)) { 573 if ((policy_in = strdup(optarg)) == NULL) 574 errx(1, "strdup"); 575 } else if (!strncmp("out", optarg, 3)) { 576 if ((policy_out = strdup(optarg)) == NULL) 577 errx(1, "strdup"); 578 } else 579 errx(1, "invalid security policy"); 580 break; 581#else 582 case 'A': 583 options |= F_AUTHHDR; 584 break; 585 case 'E': 586 options |= F_ENCRYPT; 587 break; 588#endif /*IPSEC_POLICY_IPSEC*/ 589#endif /*IPSEC*/ 590 default: 591 usage(); 592 /*NOTREACHED*/ 593 } 594 } 595 596 argc -= optind; 597 argv += optind; 598 599 if (argc < 1) { 600 usage(); 601 /*NOTREACHED*/ 602 } 603 604 if (argc > 1) { 605#ifdef IPV6_RECVRTHDR /* 2292bis */ 606 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 607 argc - 1)); 608#else /* RFC2292 */ 609 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 610#endif 611 if (rthlen == 0) { 612 errx(1, "too many intermediate hops"); 613 /*NOTREACHED*/ 614 } 615 ip6optlen += rthlen; 616 } 617 618 if (options & F_NIGROUP) { 619 target = nigroup(argv[argc - 1], nig_oldmcprefix); 620 if (target == NULL) { 621 usage(); 622 /*NOTREACHED*/ 623 } 624 } else 625 target = argv[argc - 1]; 626 627 /* getaddrinfo */ 628 memset(&hints, 0, sizeof(struct addrinfo)); 629 hints.ai_flags = AI_CANONNAME; 630 hints.ai_family = AF_INET6; 631 hints.ai_socktype = SOCK_RAW; 632 hints.ai_protocol = IPPROTO_ICMPV6; 633 634 error = getaddrinfo(target, NULL, &hints, &res); 635 if (error) 636 errx(1, "%s", gai_strerror(error)); 637 if (res->ai_canonname) 638 hostname = res->ai_canonname; 639 else 640 hostname = target; 641 642 if (!res->ai_addr) 643 errx(1, "getaddrinfo failed"); 644 645 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 646 647 if ((s = socket(res->ai_family, res->ai_socktype, 648 res->ai_protocol)) < 0) 649 err(1, "socket"); 650 651 /* set the source address if specified. */ 652 if ((options & F_SRCADDR) && 653 bind(s, (struct sockaddr *)&src, srclen) != 0) { 654 err(1, "bind"); 655 } 656 657 /* set the gateway (next hop) if specified */ 658 if (gateway) { 659 memset(&hints, 0, sizeof(hints)); 660 hints.ai_family = AF_INET6; 661 hints.ai_socktype = SOCK_RAW; 662 hints.ai_protocol = IPPROTO_ICMPV6; 663 664 error = getaddrinfo(gateway, NULL, &hints, &res); 665 if (error) { 666 errx(1, "getaddrinfo for the gateway %s: %s", 667 gateway, gai_strerror(error)); 668 } 669 if (res->ai_next && (options & F_VERBOSE)) 670 warnx("gateway resolves to multiple addresses"); 671 672 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP, 673 res->ai_addr, res->ai_addrlen)) { 674 err(1, "setsockopt(IPV6_NEXTHOP)"); 675 } 676 677 freeaddrinfo(res); 678 } 679 680 /* 681 * let the kerel pass extension headers of incoming packets, 682 * for privileged socket options 683 */ 684 if ((options & F_VERBOSE) != 0) { 685 int opton = 1; 686 687#ifdef IPV6_RECVHOPOPTS 688 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 689 sizeof(opton))) 690 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 691#else /* old adv. API */ 692 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 693 sizeof(opton))) 694 err(1, "setsockopt(IPV6_HOPOPTS)"); 695#endif 696#ifdef IPV6_RECVDSTOPTS 697 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 698 sizeof(opton))) 699 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 700#else /* old adv. API */ 701 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 702 sizeof(opton))) 703 err(1, "setsockopt(IPV6_DSTOPTS)"); 704#endif 705#ifdef IPV6_RECVRTHDRDSTOPTS 706 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 707 sizeof(opton))) 708 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 709#endif 710 } 711 712 /* revoke root privilege */ 713 if (seteuid(getuid()) != 0) 714 err(1, "seteuid() failed"); 715 if (setuid(getuid()) != 0) 716 err(1, "setuid() failed"); 717 718 if ((options & F_FLOOD) && (options & F_INTERVAL)) 719 errx(1, "-f and -i incompatible options"); 720 721 if ((options & F_NOUSERDATA) == 0) { 722 if (datalen >= sizeof(struct tv32)) { 723 /* we can time transfer */ 724 timing = 1; 725 } else 726 timing = 0; 727 /* in F_VERBOSE case, we may get non-echoreply packets*/ 728 if (options & F_VERBOSE) 729 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 730 else 731 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 732 } else { 733 /* suppress timing for node information query */ 734 timing = 0; 735 datalen = 2048; 736 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 737 } 738 739 if (!(packet = (u_char *)malloc((u_int)packlen))) 740 err(1, "Unable to allocate packet"); 741 if (!(options & F_PINGFILLED)) 742 for (i = ICMP6ECHOLEN; i < packlen; ++i) 743 *datap++ = i; 744 745 ident = getpid() & 0xFFFF; 746#ifndef HAVE_ARC4RANDOM 747 gettimeofday(&seed, NULL); 748 srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident)); 749 memset(nonce, 0, sizeof(nonce)); 750 for (i = 0; i < sizeof(nonce); i += sizeof(int)) 751 *((int *)&nonce[i]) = rand(); 752#else 753 memset(nonce, 0, sizeof(nonce)); 754 for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t)) 755 *((u_int32_t *)&nonce[i]) = arc4random(); 756#endif 757 optval = 1; 758 if (options & F_DONTFRAG) 759 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG, 760 &optval, sizeof(optval)) == -1) 761 err(1, "IPV6_DONTFRAG"); 762 hold = 1; 763 764 if (options & F_SO_DEBUG) 765 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 766 sizeof(hold)); 767 optval = IPV6_DEFHLIM; 768 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 769 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 770 &optval, sizeof(optval)) == -1) 771 err(1, "IPV6_MULTICAST_HOPS"); 772#ifdef IPV6_USE_MIN_MTU 773 if (mflag != 1) { 774 optval = mflag > 1 ? 0 : 1; 775 776 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 777 &optval, sizeof(optval)) == -1) 778 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 779 } 780#ifdef IPV6_RECVPATHMTU 781 else { 782 optval = 1; 783 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, 784 &optval, sizeof(optval)) == -1) 785 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 786 } 787#endif /* IPV6_RECVPATHMTU */ 788#endif /* IPV6_USE_MIN_MTU */ 789 790#ifdef IPSEC 791#ifdef IPSEC_POLICY_IPSEC 792 if (options & F_POLICY) { 793 if (setpolicy(s, policy_in) < 0) 794 errx(1, "%s", ipsec_strerror()); 795 if (setpolicy(s, policy_out) < 0) 796 errx(1, "%s", ipsec_strerror()); 797 } 798#else 799 if (options & F_AUTHHDR) { 800 optval = IPSEC_LEVEL_REQUIRE; 801#ifdef IPV6_AUTH_TRANS_LEVEL 802 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 803 &optval, sizeof(optval)) == -1) 804 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 805#else /* old def */ 806 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 807 &optval, sizeof(optval)) == -1) 808 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 809#endif 810 } 811 if (options & F_ENCRYPT) { 812 optval = IPSEC_LEVEL_REQUIRE; 813 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 814 &optval, sizeof(optval)) == -1) 815 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 816 } 817#endif /*IPSEC_POLICY_IPSEC*/ 818#endif 819 820#ifdef ICMP6_FILTER 821 { 822 struct icmp6_filter filt; 823 if (!(options & F_VERBOSE)) { 824 ICMP6_FILTER_SETBLOCKALL(&filt); 825 if ((options & F_FQDN) || (options & F_FQDNOLD) || 826 (options & F_NODEADDR) || (options & F_SUPTYPES)) 827 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 828 else 829 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 830 } else { 831 ICMP6_FILTER_SETPASSALL(&filt); 832 } 833 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 834 sizeof(filt)) < 0) 835 err(1, "setsockopt(ICMP6_FILTER)"); 836 } 837#endif /*ICMP6_FILTER*/ 838 839 /* let the kerel pass extension headers of incoming packets */ 840 if ((options & F_VERBOSE) != 0) { 841 int opton = 1; 842 843#ifdef IPV6_RECVRTHDR 844 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 845 sizeof(opton))) 846 err(1, "setsockopt(IPV6_RECVRTHDR)"); 847#else /* old adv. API */ 848 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton, 849 sizeof(opton))) 850 err(1, "setsockopt(IPV6_RTHDR)"); 851#endif 852 } 853 854/* 855 optval = 1; 856 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 857 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 858 &optval, sizeof(optval)) == -1) 859 err(1, "IPV6_MULTICAST_LOOP"); 860*/ 861 862 /* Specify the outgoing interface and/or the source address */ 863 if (usepktinfo) 864 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 865 866 if (hoplimit != -1) 867 ip6optlen += CMSG_SPACE(sizeof(int)); 868 869 /* set IP6 packet options */ 870 if (ip6optlen) { 871 if ((scmsg = (char *)malloc(ip6optlen)) == 0) 872 errx(1, "can't allocate enough memory"); 873 smsghdr.msg_control = (caddr_t)scmsg; 874 smsghdr.msg_controllen = ip6optlen; 875 scmsgp = (struct cmsghdr *)scmsg; 876 } 877 if (usepktinfo) { 878 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); 879 memset(pktinfo, 0, sizeof(*pktinfo)); 880 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 881 scmsgp->cmsg_level = IPPROTO_IPV6; 882 scmsgp->cmsg_type = IPV6_PKTINFO; 883 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 884 } 885 886 /* set the outgoing interface */ 887 if (ifname) { 888#ifndef USE_SIN6_SCOPE_ID 889 /* pktinfo must have already been allocated */ 890 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0) 891 errx(1, "%s: invalid interface name", ifname); 892#else 893 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 894 errx(1, "%s: invalid interface name", ifname); 895#endif 896 } 897 if (hoplimit != -1) { 898 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 899 scmsgp->cmsg_level = IPPROTO_IPV6; 900 scmsgp->cmsg_type = IPV6_HOPLIMIT; 901 *(int *)(CMSG_DATA(scmsgp)) = hoplimit; 902 903 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 904 } 905 906 if (argc > 1) { /* some intermediate addrs are specified */ 907 int hops; 908#ifdef USE_RFC2292BIS 909 int rthdrlen; 910#endif 911 912#ifdef USE_RFC2292BIS 913 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 914 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 915 scmsgp->cmsg_level = IPPROTO_IPV6; 916 scmsgp->cmsg_type = IPV6_RTHDR; 917 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 918 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 919 IPV6_RTHDR_TYPE_0, argc - 1); 920 if (rthdr == NULL) 921 errx(1, "can't initialize rthdr"); 922#else /* old advanced API */ 923 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp, 924 IPV6_RTHDR_TYPE_0)) == 0) 925 errx(1, "can't initialize rthdr"); 926#endif /* USE_RFC2292BIS */ 927 928 for (hops = 0; hops < argc - 1; hops++) { 929 memset(&hints, 0, sizeof(hints)); 930 hints.ai_family = AF_INET6; 931 932 if ((error = getaddrinfo(argv[hops], NULL, &hints, 933 &res))) 934 errx(1, "%s", gai_strerror(error)); 935 if (res->ai_addr->sa_family != AF_INET6) 936 errx(1, 937 "bad addr family of an intermediate addr"); 938 sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr; 939#ifdef USE_RFC2292BIS 940 if (inet6_rth_add(rthdr, &sin6->sin6_addr)) 941 errx(1, "can't add an intermediate node"); 942#else /* old advanced API */ 943 if (inet6_rthdr_add(scmsg, &sin6->sin6_addr, 944 IPV6_RTHDR_LOOSE)) 945 errx(1, "can't add an intermediate node"); 946#endif /* USE_RFC2292BIS */ 947 freeaddrinfo(res); 948 } 949 950#ifndef USE_RFC2292BIS 951 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE)) 952 errx(1, "can't set the last flag"); 953#endif 954 955 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 956 } 957 958 if (!(options & F_SRCADDR)) { 959 /* 960 * get the source address. XXX since we revoked the root 961 * privilege, we cannot use a raw socket for this. 962 */ 963 int dummy; 964 socklen_t len = sizeof(src); 965 966 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 967 err(1, "UDP socket"); 968 969 src.sin6_family = AF_INET6; 970 src.sin6_addr = dst.sin6_addr; 971 src.sin6_port = ntohs(DUMMY_PORT); 972 src.sin6_scope_id = dst.sin6_scope_id; 973 974#ifdef USE_RFC2292BIS 975 if (pktinfo && 976 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 977 (void *)pktinfo, sizeof(*pktinfo))) 978 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 979 980 if (hoplimit != -1 && 981 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 982 (void *)&hoplimit, sizeof(hoplimit))) 983 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); 984 985 if (hoplimit != -1 && 986 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 987 (void *)&hoplimit, sizeof(hoplimit))) 988 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); 989 990 if (rthdr && 991 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 992 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 993 err(1, "UDP setsockopt(IPV6_RTHDR)"); 994#else /* old advanced API */ 995 if (smsghdr.msg_control && 996 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS, 997 (void *)smsghdr.msg_control, smsghdr.msg_controllen)) 998 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)"); 999#endif 1000 1001 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 1002 err(1, "UDP connect"); 1003 1004 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 1005 err(1, "getsockname"); 1006 1007 close(dummy); 1008 } 1009 1010#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 1011 if (sockbufsize) { 1012 if (datalen > sockbufsize) 1013 warnx("you need -b to increase socket buffer size"); 1014 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 1015 sizeof(sockbufsize)) < 0) 1016 err(1, "setsockopt(SO_SNDBUF)"); 1017 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 1018 sizeof(sockbufsize)) < 0) 1019 err(1, "setsockopt(SO_RCVBUF)"); 1020 } 1021 else { 1022 if (datalen > 8 * 1024) /*XXX*/ 1023 warnx("you need -b to increase socket buffer size"); 1024 /* 1025 * When pinging the broadcast address, you can get a lot of 1026 * answers. Doing something so evil is useful if you are trying 1027 * to stress the ethernet, or just want to fill the arp cache 1028 * to get some stuff for /etc/ethers. 1029 */ 1030 hold = 48 * 1024; 1031 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 1032 sizeof(hold)); 1033 } 1034#endif 1035 1036 optval = 1; 1037#ifndef USE_SIN6_SCOPE_ID 1038#ifdef IPV6_RECVPKTINFO 1039 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 1040 sizeof(optval)) < 0) 1041 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 1042#else /* old adv. API */ 1043 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 1044 sizeof(optval)) < 0) 1045 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 1046#endif 1047#endif /* USE_SIN6_SCOPE_ID */ 1048#ifdef IPV6_RECVHOPLIMIT 1049 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 1050 sizeof(optval)) < 0) 1051 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 1052#else /* old adv. API */ 1053 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 1054 sizeof(optval)) < 0) 1055 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 1056#endif 1057 1058 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 1059 (unsigned long)(pingerlen() - 8)); 1060 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 1061 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 1062 1063 if (preload == 0) 1064 pinger(); 1065 else { 1066 if (npackets != 0 && preload > npackets) 1067 preload = npackets; 1068 while (preload--) 1069 pinger(); 1070 } 1071 gettimeofday(&last, NULL); 1072 1073 sigemptyset(&si_sa.sa_mask); 1074 si_sa.sa_flags = 0; 1075 si_sa.sa_handler = onsignal; 1076 if (sigaction(SIGINT, &si_sa, 0) == -1) 1077 err(EX_OSERR, "sigaction SIGINT"); 1078 seenint = 0; 1079#ifdef SIGINFO 1080 if (sigaction(SIGINFO, &si_sa, 0) == -1) 1081 err(EX_OSERR, "sigaction SIGINFO"); 1082 seeninfo = 0; 1083#endif 1084 if (alarmtimeout > 0) { 1085 if (sigaction(SIGALRM, &si_sa, 0) == -1) 1086 err(EX_OSERR, "sigaction SIGALRM"); 1087 } 1088 if (options & F_FLOOD) { 1089 intvl.tv_sec = 0; 1090 intvl.tv_usec = 10000; 1091 } else if ((options & F_INTERVAL) == 0) { 1092 intvl.tv_sec = interval / 1000; 1093 intvl.tv_usec = interval % 1000 * 1000; 1094 } 1095 1096 almost_done = 0; 1097 while (seenint == 0) { 1098 struct timeval now, timeout; 1099 struct msghdr m; 1100 struct iovec iov[2]; 1101 fd_set rfds; 1102 int n; 1103 1104 /* signal handling */ 1105 if (seenint) 1106 onint(SIGINT); 1107#ifdef SIGINFO 1108 if (seeninfo) { 1109 summary(); 1110 seeninfo = 0; 1111 continue; 1112 } 1113#endif 1114 FD_ZERO(&rfds); 1115 FD_SET(s, &rfds); 1116 gettimeofday(&now, NULL); 1117 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 1118 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 1119 while (timeout.tv_usec < 0) { 1120 timeout.tv_usec += 1000000; 1121 timeout.tv_sec--; 1122 } 1123 while (timeout.tv_usec > 1000000) { 1124 timeout.tv_usec -= 1000000; 1125 timeout.tv_sec++; 1126 } 1127 if (timeout.tv_sec < 0) 1128 timeout.tv_sec = timeout.tv_usec = 0; 1129 1130 n = select(s + 1, &rfds, NULL, NULL, &timeout); 1131 if (n < 0) 1132 continue; /* EINTR */ 1133 if (n == 1) { 1134 m.msg_name = (caddr_t)&from; 1135 m.msg_namelen = sizeof(from); 1136 memset(&iov, 0, sizeof(iov)); 1137 iov[0].iov_base = (caddr_t)packet; 1138 iov[0].iov_len = packlen; 1139 m.msg_iov = iov; 1140 m.msg_iovlen = 1; 1141 memset(cm, 0, CONTROLLEN); 1142 m.msg_control = (void *)cm; 1143 m.msg_controllen = CONTROLLEN; 1144 1145 cc = recvmsg(s, &m, 0); 1146 if (cc < 0) { 1147 if (errno != EINTR) { 1148 warn("recvmsg"); 1149 sleep(1); 1150 } 1151 continue; 1152 } else if (cc == 0) { 1153 int mtu; 1154 1155 /* 1156 * receive control messages only. Process the 1157 * exceptions (currently the only possibility is 1158 * a path MTU notification.) 1159 */ 1160 if ((mtu = get_pathmtu(&m)) > 0) { 1161 if ((options & F_VERBOSE) != 0) { 1162 printf("new path MTU (%d) is " 1163 "notified\n", mtu); 1164 } 1165 } 1166 continue; 1167 } else { 1168 /* 1169 * an ICMPv6 message (probably an echoreply) 1170 * arrived. 1171 */ 1172 pr_pack(packet, cc, &m); 1173 } 1174 if (((options & F_ONCE) != 0 && nreceived > 0) || 1175 (npackets > 0 && nreceived >= npackets)) 1176 break; 1177 } 1178 if (n == 0 || (options & F_FLOOD)) { 1179 if (npackets == 0 || ntransmitted < npackets) 1180 pinger(); 1181 else { 1182 if (almost_done) 1183 break; 1184 almost_done = 1; 1185 /* 1186 * If we're not transmitting any more packets, 1187 * change the timer to wait two round-trip times 1188 * if we've received any packets or (waittime) 1189 * milliseconds if we haven't. 1190 */ 1191 intvl.tv_usec = 0; 1192 if (nreceived) { 1193 intvl.tv_sec = 2 * tmax / 1000; 1194 if (intvl.tv_sec == 0) 1195 intvl.tv_sec = 1; 1196 } else { 1197 intvl.tv_sec = waittime / 1000; 1198 intvl.tv_usec = waittime % 1000 * 1000; 1199 } 1200 } 1201 gettimeofday(&last, NULL); 1202 if (ntransmitted - nreceived - 1 > nmissedmax) { 1203 nmissedmax = ntransmitted - nreceived - 1; 1204 if (options & F_MISSED) 1205 (void)write(STDOUT_FILENO, &BBELL, 1); 1206 } 1207 } 1208 } 1209 sigemptyset(&si_sa.sa_mask); 1210 si_sa.sa_flags = 0; 1211 si_sa.sa_handler = SIG_IGN; 1212 sigaction(SIGINT, &si_sa, 0); 1213 sigaction(SIGALRM, &si_sa, 0); 1214 summary(); 1215 1216 if (res != NULL) 1217 freeaddrinfo(res); 1218 1219 if(packet != NULL) 1220 free(packet); 1221 1222 exit(nreceived == 0 ? 2 : 0); 1223} 1224 1225void 1226onsignal(int sig) 1227{ 1228 1229 switch (sig) { 1230 case SIGINT: 1231 case SIGALRM: 1232 seenint++; 1233 break; 1234#ifdef SIGINFO 1235 case SIGINFO: 1236 seeninfo++; 1237 break; 1238#endif 1239 } 1240} 1241 1242/* 1243 * pinger -- 1244 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1245 * will be added on by the kernel. The ID field is our UNIX process ID, 1246 * and the sequence number is an ascending integer. The first 8 bytes 1247 * of the data portion are used to hold a UNIX "timeval" struct in VAX 1248 * byte-order, to compute the round-trip time. 1249 */ 1250size_t 1251pingerlen(void) 1252{ 1253 size_t l; 1254 1255 if (options & F_FQDN) 1256 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1257 else if (options & F_FQDNOLD) 1258 l = ICMP6_NIQLEN; 1259 else if (options & F_NODEADDR) 1260 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1261 else if (options & F_SUPTYPES) 1262 l = ICMP6_NIQLEN; 1263 else 1264 l = ICMP6ECHOLEN + datalen; 1265 1266 return l; 1267} 1268 1269int 1270pinger(void) 1271{ 1272 struct icmp6_hdr *icp; 1273 struct iovec iov[2]; 1274 int i, cc; 1275 struct icmp6_nodeinfo *nip; 1276 int seq; 1277 1278 if (npackets && ntransmitted >= npackets) 1279 return(-1); /* no more transmission */ 1280 1281 icp = (struct icmp6_hdr *)outpack; 1282 nip = (struct icmp6_nodeinfo *)outpack; 1283 memset(icp, 0, sizeof(*icp)); 1284 icp->icmp6_cksum = 0; 1285 seq = ntransmitted++; 1286 CLR(seq % mx_dup_ck); 1287 1288 if (options & F_FQDN) { 1289 icp->icmp6_type = ICMP6_NI_QUERY; 1290 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1291 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1292 nip->ni_flags = htons(0); 1293 1294 memcpy(nip->icmp6_ni_nonce, nonce, 1295 sizeof(nip->icmp6_ni_nonce)); 1296 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1297 1298 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1299 sizeof(dst.sin6_addr)); 1300 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1301 datalen = 0; 1302 } else if (options & F_FQDNOLD) { 1303 /* packet format in 03 draft - no Subject data on queries */ 1304 icp->icmp6_type = ICMP6_NI_QUERY; 1305 icp->icmp6_code = 0; /* code field is always 0 */ 1306 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1307 nip->ni_flags = htons(0); 1308 1309 memcpy(nip->icmp6_ni_nonce, nonce, 1310 sizeof(nip->icmp6_ni_nonce)); 1311 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1312 1313 cc = ICMP6_NIQLEN; 1314 datalen = 0; 1315 } else if (options & F_NODEADDR) { 1316 icp->icmp6_type = ICMP6_NI_QUERY; 1317 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1318 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1319 nip->ni_flags = naflags; 1320 1321 memcpy(nip->icmp6_ni_nonce, nonce, 1322 sizeof(nip->icmp6_ni_nonce)); 1323 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1324 1325 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1326 sizeof(dst.sin6_addr)); 1327 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1328 datalen = 0; 1329 } else if (options & F_SUPTYPES) { 1330 icp->icmp6_type = ICMP6_NI_QUERY; 1331 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1332 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1333 /* we support compressed bitmap */ 1334 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1335 1336 memcpy(nip->icmp6_ni_nonce, nonce, 1337 sizeof(nip->icmp6_ni_nonce)); 1338 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1339 cc = ICMP6_NIQLEN; 1340 datalen = 0; 1341 } else { 1342 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1343 icp->icmp6_code = 0; 1344 icp->icmp6_id = htons(ident); 1345 icp->icmp6_seq = ntohs(seq); 1346 if (timing) { 1347 struct timeval tv; 1348 struct tv32 *tv32; 1349 (void)gettimeofday(&tv, NULL); 1350 tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN]; 1351 tv32->tv32_sec = htonl(tv.tv_sec); 1352 tv32->tv32_usec = htonl(tv.tv_usec); 1353 } 1354 cc = ICMP6ECHOLEN + datalen; 1355 } 1356 1357#ifdef DIAGNOSTIC 1358 if (pingerlen() != cc) 1359 errx(1, "internal error; length mismatch"); 1360#endif 1361 1362 smsghdr.msg_name = (caddr_t)&dst; 1363 smsghdr.msg_namelen = sizeof(dst); 1364 memset(&iov, 0, sizeof(iov)); 1365 iov[0].iov_base = (caddr_t)outpack; 1366 iov[0].iov_len = cc; 1367 smsghdr.msg_iov = iov; 1368 smsghdr.msg_iovlen = 1; 1369 1370 i = sendmsg(s, &smsghdr, 0); 1371 1372 if (i < 0 || i != cc) { 1373 if (i < 0) 1374 warn("sendmsg"); 1375 (void)printf("ping6: wrote %s %d chars, ret=%d\n", 1376 hostname, cc, i); 1377 } 1378 if (!(options & F_QUIET) && options & F_FLOOD) 1379 (void)write(STDOUT_FILENO, &DOT, 1); 1380 1381 return(0); 1382} 1383 1384int 1385myechoreply(const struct icmp6_hdr *icp) 1386{ 1387 if (ntohs(icp->icmp6_id) == ident) 1388 return 1; 1389 else 1390 return 0; 1391} 1392 1393int 1394mynireply(const struct icmp6_nodeinfo *nip) 1395{ 1396 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1397 nonce + sizeof(u_int16_t), 1398 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1399 return 1; 1400 else 1401 return 0; 1402} 1403 1404char * 1405dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf, 1406 size_t bufsiz) 1407 /*base for compressed name*/ 1408{ 1409 int i; 1410 const u_char *cp; 1411 char cresult[MAXDNAME + 1]; 1412 const u_char *comp; 1413 int l; 1414 1415 cp = *sp; 1416 *buf = '\0'; 1417 1418 if (cp >= ep) 1419 return NULL; 1420 while (cp < ep) { 1421 i = *cp; 1422 if (i == 0 || cp != *sp) { 1423 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz) 1424 return NULL; /*result overrun*/ 1425 } 1426 if (i == 0) 1427 break; 1428 cp++; 1429 1430 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1431 /* DNS compression */ 1432 if (!base) 1433 return NULL; 1434 1435 comp = base + (i & 0x3f); 1436 if (dnsdecode(&comp, cp, base, cresult, 1437 sizeof(cresult)) == NULL) 1438 return NULL; 1439 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1440 return NULL; /*result overrun*/ 1441 break; 1442 } else if ((i & 0x3f) == i) { 1443 if (i > ep - cp) 1444 return NULL; /*source overrun*/ 1445 while (i-- > 0 && cp < ep) { 1446 l = snprintf(cresult, sizeof(cresult), 1447 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1448 if (l >= sizeof(cresult) || l < 0) 1449 return NULL; 1450 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1451 return NULL; /*result overrun*/ 1452 cp++; 1453 } 1454 } else 1455 return NULL; /*invalid label*/ 1456 } 1457 if (i != 0) 1458 return NULL; /*not terminated*/ 1459 cp++; 1460 *sp = cp; 1461 return buf; 1462} 1463 1464/* 1465 * pr_pack -- 1466 * Print out the packet, if it came from us. This logic is necessary 1467 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1468 * which arrive ('tis only fair). This permits multiple copies of this 1469 * program to be run without having intermingled output (or statistics!). 1470 */ 1471void 1472pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1473{ 1474#define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1475 struct icmp6_hdr *icp; 1476 struct icmp6_nodeinfo *ni; 1477 int i; 1478 int hoplim; 1479 struct sockaddr *from; 1480 int fromlen; 1481 u_char *cp = NULL, *dp, *end = buf + cc; 1482 struct in6_pktinfo *pktinfo = NULL; 1483 struct timeval tv, tp; 1484 struct tv32 *tpp; 1485 double triptime = 0; 1486 int dupflag; 1487 size_t off; 1488 int oldfqdn; 1489 u_int16_t seq; 1490 char dnsname[MAXDNAME + 1]; 1491 1492 (void)gettimeofday(&tv, NULL); 1493 1494 if (!mhdr || !mhdr->msg_name || 1495 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1496 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1497 if (options & F_VERBOSE) 1498 warnx("invalid peername"); 1499 return; 1500 } 1501 from = (struct sockaddr *)mhdr->msg_name; 1502 fromlen = mhdr->msg_namelen; 1503 if (cc < sizeof(struct icmp6_hdr)) { 1504 if (options & F_VERBOSE) 1505 warnx("packet too short (%d bytes) from %s", cc, 1506 pr_addr(from, fromlen)); 1507 return; 1508 } 1509 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) && 1510 (options & F_VERBOSE) != 0) 1511 warnx("some control data discarded, insufficient buffer size"); 1512 icp = (struct icmp6_hdr *)buf; 1513 ni = (struct icmp6_nodeinfo *)buf; 1514 off = 0; 1515 1516 if ((hoplim = get_hoplim(mhdr)) == -1) { 1517 warnx("failed to get receiving hop limit"); 1518 return; 1519 } 1520 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1521 warnx("failed to get receiving packet information"); 1522 return; 1523 } 1524 1525 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1526 seq = ntohs(icp->icmp6_seq); 1527 ++nreceived; 1528 if (timing) { 1529 tpp = (struct tv32 *)(icp + 1); 1530 tp.tv_sec = ntohl(tpp->tv32_sec); 1531 tp.tv_usec = ntohl(tpp->tv32_usec); 1532 tvsub(&tv, &tp); 1533 triptime = ((double)tv.tv_sec) * 1000.0 + 1534 ((double)tv.tv_usec) / 1000.0; 1535 tsum += triptime; 1536 tsumsq += triptime * triptime; 1537 if (triptime < tmin) 1538 tmin = triptime; 1539 if (triptime > tmax) 1540 tmax = triptime; 1541 } 1542 1543 if (TST(seq % mx_dup_ck)) { 1544 ++nrepeats; 1545 --nreceived; 1546 dupflag = 1; 1547 } else { 1548 SET(seq % mx_dup_ck); 1549 dupflag = 0; 1550 } 1551 1552 if (options & F_QUIET) 1553 return; 1554 1555 if (options & F_WAITTIME && triptime > waittime) { 1556 ++nrcvtimeout; 1557 return; 1558 } 1559 1560 if (options & F_FLOOD) 1561 (void)write(STDOUT_FILENO, &BSPACE, 1); 1562 else { 1563 if (options & F_AUDIBLE) 1564 (void)write(STDOUT_FILENO, &BBELL, 1); 1565 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1566 pr_addr(from, fromlen), seq); 1567 (void)printf(" hlim=%d", hoplim); 1568 if ((options & F_VERBOSE) != 0) { 1569 struct sockaddr_in6 dstsa; 1570 1571 memset(&dstsa, 0, sizeof(dstsa)); 1572 dstsa.sin6_family = AF_INET6; 1573 dstsa.sin6_len = sizeof(dstsa); 1574 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1575 dstsa.sin6_addr = pktinfo->ipi6_addr; 1576 (void)printf(" dst=%s", 1577 pr_addr((struct sockaddr *)&dstsa, 1578 sizeof(dstsa))); 1579 } 1580 if (timing) 1581 (void)printf(" time=%.3f ms", triptime); 1582 if (dupflag) 1583 (void)printf("(DUP!)"); 1584 /* check the data */ 1585 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1586 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1587 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1588 if (*cp != *dp) { 1589 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1590 break; 1591 } 1592 } 1593 } 1594 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1595 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce); 1596 ++nreceived; 1597 if (TST(seq % mx_dup_ck)) { 1598 ++nrepeats; 1599 --nreceived; 1600 dupflag = 1; 1601 } else { 1602 SET(seq % mx_dup_ck); 1603 dupflag = 0; 1604 } 1605 1606 if (options & F_QUIET) 1607 return; 1608 1609 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1610 1611 switch (ntohs(ni->ni_code)) { 1612 case ICMP6_NI_SUCCESS: 1613 break; 1614 case ICMP6_NI_REFUSED: 1615 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1616 goto fqdnend; 1617 case ICMP6_NI_UNKNOWN: 1618 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1619 goto fqdnend; 1620 default: 1621 printf("unknown code 0x%x, type 0x%x", 1622 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1623 goto fqdnend; 1624 } 1625 1626 switch (ntohs(ni->ni_qtype)) { 1627 case NI_QTYPE_NOOP: 1628 printf("NodeInfo NOOP"); 1629 break; 1630 case NI_QTYPE_SUPTYPES: 1631 pr_suptypes(ni, end - (u_char *)ni); 1632 break; 1633 case NI_QTYPE_NODEADDR: 1634 pr_nodeaddr(ni, end - (u_char *)ni); 1635 break; 1636 case NI_QTYPE_FQDN: 1637 default: /* XXX: for backward compatibility */ 1638 cp = (u_char *)ni + ICMP6_NIRLEN; 1639 if (buf[off + ICMP6_NIRLEN] == 1640 cc - off - ICMP6_NIRLEN - 1) 1641 oldfqdn = 1; 1642 else 1643 oldfqdn = 0; 1644 if (oldfqdn) { 1645 cp++; /* skip length */ 1646 while (cp < end) { 1647 safeputc(*cp & 0xff); 1648 cp++; 1649 } 1650 } else { 1651 i = 0; 1652 while (cp < end) { 1653 if (dnsdecode((const u_char **)&cp, end, 1654 (const u_char *)(ni + 1), dnsname, 1655 sizeof(dnsname)) == NULL) { 1656 printf("???"); 1657 break; 1658 } 1659 /* 1660 * name-lookup special handling for 1661 * truncated name 1662 */ 1663 if (cp + 1 <= end && !*cp && 1664 strlen(dnsname) > 0) { 1665 dnsname[strlen(dnsname) - 1] = '\0'; 1666 cp++; 1667 } 1668 printf("%s%s", i > 0 ? "," : "", 1669 dnsname); 1670 } 1671 } 1672 if (options & F_VERBOSE) { 1673 int32_t ttl; 1674 int comma = 0; 1675 1676 (void)printf(" ("); /*)*/ 1677 1678 switch (ni->ni_code) { 1679 case ICMP6_NI_REFUSED: 1680 (void)printf("refused"); 1681 comma++; 1682 break; 1683 case ICMP6_NI_UNKNOWN: 1684 (void)printf("unknown qtype"); 1685 comma++; 1686 break; 1687 } 1688 1689 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1690 /* case of refusion, unknown */ 1691 /*(*/ 1692 putchar(')'); 1693 goto fqdnend; 1694 } 1695 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]); 1696 if (comma) 1697 printf(","); 1698 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1699 (void)printf("TTL=%d:meaningless", 1700 (int)ttl); 1701 } else { 1702 if (ttl < 0) { 1703 (void)printf("TTL=%d:invalid", 1704 ttl); 1705 } else 1706 (void)printf("TTL=%d", ttl); 1707 } 1708 comma++; 1709 1710 if (oldfqdn) { 1711 if (comma) 1712 printf(","); 1713 printf("03 draft"); 1714 comma++; 1715 } else { 1716 cp = (u_char *)ni + ICMP6_NIRLEN; 1717 if (cp == end) { 1718 if (comma) 1719 printf(","); 1720 printf("no name"); 1721 comma++; 1722 } 1723 } 1724 1725 if (buf[off + ICMP6_NIRLEN] != 1726 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1727 if (comma) 1728 printf(","); 1729 (void)printf("invalid namelen:%d/%lu", 1730 buf[off + ICMP6_NIRLEN], 1731 (u_long)cc - off - ICMP6_NIRLEN - 1); 1732 comma++; 1733 } 1734 /*(*/ 1735 putchar(')'); 1736 } 1737 fqdnend: 1738 ; 1739 } 1740 } else { 1741 /* We've got something other than an ECHOREPLY */ 1742 if (!(options & F_VERBOSE)) 1743 return; 1744 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1745 pr_icmph(icp, end); 1746 } 1747 1748 if (!(options & F_FLOOD)) { 1749 (void)putchar('\n'); 1750 if (options & F_VERBOSE) 1751 pr_exthdrs(mhdr); 1752 (void)fflush(stdout); 1753 } 1754#undef safeputc 1755} 1756 1757void 1758pr_exthdrs(struct msghdr *mhdr) 1759{ 1760 ssize_t bufsize; 1761 void *bufp; 1762 struct cmsghdr *cm; 1763 1764 bufsize = 0; 1765 bufp = mhdr->msg_control; 1766 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1767 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1768 if (cm->cmsg_level != IPPROTO_IPV6) 1769 continue; 1770 1771 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp); 1772 if (bufsize <= 0) 1773 continue; 1774 switch (cm->cmsg_type) { 1775 case IPV6_HOPOPTS: 1776 printf(" HbH Options: "); 1777 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1778 break; 1779 case IPV6_DSTOPTS: 1780#ifdef IPV6_RTHDRDSTOPTS 1781 case IPV6_RTHDRDSTOPTS: 1782#endif 1783 printf(" Dst Options: "); 1784 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1785 break; 1786 case IPV6_RTHDR: 1787 printf(" Routing: "); 1788 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize); 1789 break; 1790 } 1791 } 1792} 1793 1794#ifdef USE_RFC2292BIS 1795void 1796pr_ip6opt(void *extbuf, size_t bufsize) 1797{ 1798 struct ip6_hbh *ext; 1799 int currentlen; 1800 u_int8_t type; 1801 socklen_t extlen, len; 1802 void *databuf; 1803 size_t offset; 1804 u_int16_t value2; 1805 u_int32_t value4; 1806 1807 ext = (struct ip6_hbh *)extbuf; 1808 extlen = (ext->ip6h_len + 1) * 8; 1809 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1810 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1811 1812 /* 1813 * Bounds checking on the ancillary data buffer: 1814 * subtract the size of a cmsg structure from the buffer size. 1815 */ 1816 if (bufsize < (extlen + CMSG_SPACE(0))) { 1817 extlen = bufsize - CMSG_SPACE(0); 1818 warnx("options truncated, showing only %u (total=%u)", 1819 (unsigned int)(extlen / 8 - 1), 1820 (unsigned int)(ext->ip6h_len)); 1821 } 1822 1823 currentlen = 0; 1824 while (1) { 1825 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1826 &type, &len, &databuf); 1827 if (currentlen == -1) 1828 break; 1829 switch (type) { 1830 /* 1831 * Note that inet6_opt_next automatically skips any padding 1832 * optins. 1833 */ 1834 case IP6OPT_JUMBO: 1835 offset = 0; 1836 offset = inet6_opt_get_val(databuf, offset, 1837 &value4, sizeof(value4)); 1838 printf(" Jumbo Payload Opt: Length %u\n", 1839 (u_int32_t)ntohl(value4)); 1840 break; 1841 case IP6OPT_ROUTER_ALERT: 1842 offset = 0; 1843 offset = inet6_opt_get_val(databuf, offset, 1844 &value2, sizeof(value2)); 1845 printf(" Router Alert Opt: Type %u\n", 1846 ntohs(value2)); 1847 break; 1848 default: 1849 printf(" Received Opt %u len %lu\n", 1850 type, (unsigned long)len); 1851 break; 1852 } 1853 } 1854 return; 1855} 1856#else /* !USE_RFC2292BIS */ 1857/* ARGSUSED */ 1858void 1859pr_ip6opt(void *extbuf, size_t bufsize __unused) 1860{ 1861 putchar('\n'); 1862 return; 1863} 1864#endif /* USE_RFC2292BIS */ 1865 1866#ifdef USE_RFC2292BIS 1867void 1868pr_rthdr(void *extbuf, size_t bufsize) 1869{ 1870 struct in6_addr *in6; 1871 char ntopbuf[INET6_ADDRSTRLEN]; 1872 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1873 int i, segments, origsegs, rthsize, size0, size1; 1874 1875 /* print fixed part of the header */ 1876 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1877 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1878 if ((segments = inet6_rth_segments(extbuf)) >= 0) { 1879 printf("%d segments, ", segments); 1880 printf("%d left\n", rh->ip6r_segleft); 1881 } else { 1882 printf("segments unknown, "); 1883 printf("%d left\n", rh->ip6r_segleft); 1884 return; 1885 } 1886 1887 /* 1888 * Bounds checking on the ancillary data buffer. When calculating 1889 * the number of items to show keep in mind: 1890 * - The size of the cmsg structure 1891 * - The size of one segment (the size of a Type 0 routing header) 1892 * - When dividing add a fudge factor of one in case the 1893 * dividend is not evenly divisible by the divisor 1894 */ 1895 rthsize = (rh->ip6r_len + 1) * 8; 1896 if (bufsize < (rthsize + CMSG_SPACE(0))) { 1897 origsegs = segments; 1898 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0); 1899 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1); 1900 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) / 1901 (size1 - size0) + 1; 1902 warnx("segments truncated, showing only %d (total=%d)", 1903 segments, origsegs); 1904 } 1905 1906 for (i = 0; i < segments; i++) { 1907 in6 = inet6_rth_getaddr(extbuf, i); 1908 if (in6 == NULL) 1909 printf(" [%d]<NULL>\n", i); 1910 else { 1911 if (!inet_ntop(AF_INET6, in6, ntopbuf, 1912 sizeof(ntopbuf))) 1913 strlcpy(ntopbuf, "?", sizeof(ntopbuf)); 1914 printf(" [%d]%s\n", i, ntopbuf); 1915 } 1916 } 1917 1918 return; 1919 1920} 1921 1922#else /* !USE_RFC2292BIS */ 1923/* ARGSUSED */ 1924void 1925pr_rthdr(void *extbuf, size_t bufsize __unused) 1926{ 1927 putchar('\n'); 1928 return; 1929} 1930#endif /* USE_RFC2292BIS */ 1931 1932int 1933pr_bitrange(u_int32_t v, int soff, int ii) 1934{ 1935 int off; 1936 int i; 1937 1938 off = 0; 1939 while (off < 32) { 1940 /* shift till we have 0x01 */ 1941 if ((v & 0x01) == 0) { 1942 if (ii > 1) 1943 printf("-%u", soff + off - 1); 1944 ii = 0; 1945 switch (v & 0x0f) { 1946 case 0x00: 1947 v >>= 4; 1948 off += 4; 1949 continue; 1950 case 0x08: 1951 v >>= 3; 1952 off += 3; 1953 continue; 1954 case 0x04: case 0x0c: 1955 v >>= 2; 1956 off += 2; 1957 continue; 1958 default: 1959 v >>= 1; 1960 off += 1; 1961 continue; 1962 } 1963 } 1964 1965 /* we have 0x01 with us */ 1966 for (i = 0; i < 32 - off; i++) { 1967 if ((v & (0x01 << i)) == 0) 1968 break; 1969 } 1970 if (!ii) 1971 printf(" %u", soff + off); 1972 ii += i; 1973 v >>= i; off += i; 1974 } 1975 return ii; 1976} 1977 1978void 1979pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 1980 /* ni->qtype must be SUPTYPES */ 1981{ 1982 size_t clen; 1983 u_int32_t v; 1984 const u_char *cp, *end; 1985 u_int16_t cur; 1986 struct cbit { 1987 u_int16_t words; /*32bit count*/ 1988 u_int16_t skip; 1989 } cbit; 1990#define MAXQTYPES (1 << 16) 1991 size_t off; 1992 int b; 1993 1994 cp = (u_char *)(ni + 1); 1995 end = ((u_char *)ni) + nilen; 1996 cur = 0; 1997 b = 0; 1998 1999 printf("NodeInfo Supported Qtypes"); 2000 if (options & F_VERBOSE) { 2001 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 2002 printf(", compressed bitmap"); 2003 else 2004 printf(", raw bitmap"); 2005 } 2006 2007 while (cp < end) { 2008 clen = (size_t)(end - cp); 2009 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 2010 if (clen == 0 || clen > MAXQTYPES / 8 || 2011 clen % sizeof(v)) { 2012 printf("???"); 2013 return; 2014 } 2015 } else { 2016 if (clen < sizeof(cbit) || clen % sizeof(v)) 2017 return; 2018 memcpy(&cbit, cp, sizeof(cbit)); 2019 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 2020 clen) 2021 return; 2022 cp += sizeof(cbit); 2023 clen = ntohs(cbit.words) * sizeof(v); 2024 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 2025 MAXQTYPES) 2026 return; 2027 } 2028 2029 for (off = 0; off < clen; off += sizeof(v)) { 2030 memcpy(&v, cp + off, sizeof(v)); 2031 v = (u_int32_t)ntohl(v); 2032 b = pr_bitrange(v, (int)(cur + off * 8), b); 2033 } 2034 /* flush the remaining bits */ 2035 b = pr_bitrange(0, (int)(cur + off * 8), b); 2036 2037 cp += clen; 2038 cur += clen * 8; 2039 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 2040 cur += ntohs(cbit.skip) * 32; 2041 } 2042} 2043 2044void 2045pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 2046 /* ni->qtype must be NODEADDR */ 2047{ 2048 u_char *cp = (u_char *)(ni + 1); 2049 char ntop_buf[INET6_ADDRSTRLEN]; 2050 int withttl = 0; 2051 2052 nilen -= sizeof(struct icmp6_nodeinfo); 2053 2054 if (options & F_VERBOSE) { 2055 switch (ni->ni_code) { 2056 case ICMP6_NI_REFUSED: 2057 (void)printf("refused"); 2058 break; 2059 case ICMP6_NI_UNKNOWN: 2060 (void)printf("unknown qtype"); 2061 break; 2062 } 2063 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 2064 (void)printf(" truncated"); 2065 } 2066 putchar('\n'); 2067 if (nilen <= 0) 2068 printf(" no address\n"); 2069 2070 /* 2071 * In icmp-name-lookups 05 and later, TTL of each returned address 2072 * is contained in the resposne. We try to detect the version 2073 * by the length of the data, but note that the detection algorithm 2074 * is incomplete. We assume the latest draft by default. 2075 */ 2076 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 2077 withttl = 1; 2078 while (nilen > 0) { 2079 u_int32_t ttl; 2080 2081 if (withttl) { 2082 /* XXX: alignment? */ 2083 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp); 2084 cp += sizeof(u_int32_t); 2085 nilen -= sizeof(u_int32_t); 2086 } 2087 2088 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 2089 NULL) 2090 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2091 printf(" %s", ntop_buf); 2092 if (withttl) { 2093 if (ttl == 0xffffffff) { 2094 /* 2095 * XXX: can this convention be applied to all 2096 * type of TTL (i.e. non-ND TTL)? 2097 */ 2098 printf("(TTL=infty)"); 2099 } 2100 else 2101 printf("(TTL=%u)", ttl); 2102 } 2103 putchar('\n'); 2104 2105 nilen -= sizeof(struct in6_addr); 2106 cp += sizeof(struct in6_addr); 2107 } 2108} 2109 2110int 2111get_hoplim(struct msghdr *mhdr) 2112{ 2113 struct cmsghdr *cm; 2114 2115 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2116 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2117 if (cm->cmsg_len == 0) 2118 return(-1); 2119 2120 if (cm->cmsg_level == IPPROTO_IPV6 && 2121 cm->cmsg_type == IPV6_HOPLIMIT && 2122 cm->cmsg_len == CMSG_LEN(sizeof(int))) 2123 return(*(int *)CMSG_DATA(cm)); 2124 } 2125 2126 return(-1); 2127} 2128 2129struct in6_pktinfo * 2130get_rcvpktinfo(struct msghdr *mhdr) 2131{ 2132 struct cmsghdr *cm; 2133 2134 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2135 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2136 if (cm->cmsg_len == 0) 2137 return(NULL); 2138 2139 if (cm->cmsg_level == IPPROTO_IPV6 && 2140 cm->cmsg_type == IPV6_PKTINFO && 2141 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) 2142 return((struct in6_pktinfo *)CMSG_DATA(cm)); 2143 } 2144 2145 return(NULL); 2146} 2147 2148int 2149get_pathmtu(struct msghdr *mhdr) 2150{ 2151#ifdef IPV6_RECVPATHMTU 2152 struct cmsghdr *cm; 2153 struct ip6_mtuinfo *mtuctl = NULL; 2154 2155 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2156 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2157 if (cm->cmsg_len == 0) 2158 return(0); 2159 2160 if (cm->cmsg_level == IPPROTO_IPV6 && 2161 cm->cmsg_type == IPV6_PATHMTU && 2162 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2163 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm); 2164 2165 /* 2166 * If the notified destination is different from 2167 * the one we are pinging, just ignore the info. 2168 * We check the scope ID only when both notified value 2169 * and our own value have non-0 values, because we may 2170 * have used the default scope zone ID for sending, 2171 * in which case the scope ID value is 0. 2172 */ 2173 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr, 2174 &dst.sin6_addr) || 2175 (mtuctl->ip6m_addr.sin6_scope_id && 2176 dst.sin6_scope_id && 2177 mtuctl->ip6m_addr.sin6_scope_id != 2178 dst.sin6_scope_id)) { 2179 if ((options & F_VERBOSE) != 0) { 2180 printf("path MTU for %s is notified. " 2181 "(ignored)\n", 2182 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr, 2183 sizeof(mtuctl->ip6m_addr))); 2184 } 2185 return(0); 2186 } 2187 2188 /* 2189 * Ignore an invalid MTU. XXX: can we just believe 2190 * the kernel check? 2191 */ 2192 if (mtuctl->ip6m_mtu < IPV6_MMTU) 2193 return(0); 2194 2195 /* notification for our destination. return the MTU. */ 2196 return((int)mtuctl->ip6m_mtu); 2197 } 2198 } 2199#endif 2200 return(0); 2201} 2202 2203/* 2204 * tvsub -- 2205 * Subtract 2 timeval structs: out = out - in. Out is assumed to 2206 * be >= in. 2207 */ 2208void 2209tvsub(struct timeval *out, struct timeval *in) 2210{ 2211 if ((out->tv_usec -= in->tv_usec) < 0) { 2212 --out->tv_sec; 2213 out->tv_usec += 1000000; 2214 } 2215 out->tv_sec -= in->tv_sec; 2216} 2217 2218/* 2219 * onint -- 2220 * SIGINT handler. 2221 */ 2222/* ARGSUSED */ 2223void 2224onint(int notused __unused) 2225{ 2226 /* 2227 * When doing reverse DNS lookups, the seenint flag might not 2228 * be noticed for a while. Just exit if we get a second SIGINT. 2229 */ 2230 if ((options & F_HOSTNAME) && seenint != 0) 2231 _exit(nreceived ? 0 : 2); 2232} 2233 2234/* 2235 * summary -- 2236 * Print out statistics. 2237 */ 2238void 2239summary(void) 2240{ 2241 2242 (void)printf("\n--- %s ping6 statistics ---\n", hostname); 2243 (void)printf("%ld packets transmitted, ", ntransmitted); 2244 (void)printf("%ld packets received, ", nreceived); 2245 if (nrepeats) 2246 (void)printf("+%ld duplicates, ", nrepeats); 2247 if (ntransmitted) { 2248 if (nreceived > ntransmitted) 2249 (void)printf("-- somebody's duplicating packets!"); 2250 else 2251 (void)printf("%.1f%% packet loss", 2252 ((((double)ntransmitted - nreceived) * 100.0) / 2253 ntransmitted)); 2254 } 2255 if (nrcvtimeout) 2256 printf(", %ld packets out of wait time", nrcvtimeout); 2257 (void)putchar('\n'); 2258 if (nreceived && timing) { 2259 /* Only display average to microseconds */ 2260 double num = nreceived + nrepeats; 2261 double avg = tsum / num; 2262 double dev = sqrt(tsumsq / num - avg * avg); 2263 (void)printf( 2264 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2265 tmin, avg, tmax, dev); 2266 (void)fflush(stdout); 2267 } 2268 (void)fflush(stdout); 2269} 2270 2271/*subject type*/ 2272static const char *niqcode[] = { 2273 "IPv6 address", 2274 "DNS label", /*or empty*/ 2275 "IPv4 address", 2276}; 2277 2278/*result code*/ 2279static const char *nircode[] = { 2280 "Success", "Refused", "Unknown", 2281}; 2282 2283 2284/* 2285 * pr_icmph -- 2286 * Print a descriptive string about an ICMP header. 2287 */ 2288void 2289pr_icmph(struct icmp6_hdr *icp, u_char *end) 2290{ 2291 char ntop_buf[INET6_ADDRSTRLEN]; 2292 struct nd_redirect *red; 2293 struct icmp6_nodeinfo *ni; 2294 char dnsname[MAXDNAME + 1]; 2295 const u_char *cp; 2296 size_t l; 2297 2298 switch (icp->icmp6_type) { 2299 case ICMP6_DST_UNREACH: 2300 switch (icp->icmp6_code) { 2301 case ICMP6_DST_UNREACH_NOROUTE: 2302 (void)printf("No Route to Destination\n"); 2303 break; 2304 case ICMP6_DST_UNREACH_ADMIN: 2305 (void)printf("Destination Administratively " 2306 "Unreachable\n"); 2307 break; 2308 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2309 (void)printf("Destination Unreachable Beyond Scope\n"); 2310 break; 2311 case ICMP6_DST_UNREACH_ADDR: 2312 (void)printf("Destination Host Unreachable\n"); 2313 break; 2314 case ICMP6_DST_UNREACH_NOPORT: 2315 (void)printf("Destination Port Unreachable\n"); 2316 break; 2317 default: 2318 (void)printf("Destination Unreachable, Bad Code: %d\n", 2319 icp->icmp6_code); 2320 break; 2321 } 2322 /* Print returned IP header information */ 2323 pr_retip((struct ip6_hdr *)(icp + 1), end); 2324 break; 2325 case ICMP6_PACKET_TOO_BIG: 2326 (void)printf("Packet too big mtu = %d\n", 2327 (int)ntohl(icp->icmp6_mtu)); 2328 pr_retip((struct ip6_hdr *)(icp + 1), end); 2329 break; 2330 case ICMP6_TIME_EXCEEDED: 2331 switch (icp->icmp6_code) { 2332 case ICMP6_TIME_EXCEED_TRANSIT: 2333 (void)printf("Time to live exceeded\n"); 2334 break; 2335 case ICMP6_TIME_EXCEED_REASSEMBLY: 2336 (void)printf("Frag reassembly time exceeded\n"); 2337 break; 2338 default: 2339 (void)printf("Time exceeded, Bad Code: %d\n", 2340 icp->icmp6_code); 2341 break; 2342 } 2343 pr_retip((struct ip6_hdr *)(icp + 1), end); 2344 break; 2345 case ICMP6_PARAM_PROB: 2346 (void)printf("Parameter problem: "); 2347 switch (icp->icmp6_code) { 2348 case ICMP6_PARAMPROB_HEADER: 2349 (void)printf("Erroneous Header "); 2350 break; 2351 case ICMP6_PARAMPROB_NEXTHEADER: 2352 (void)printf("Unknown Nextheader "); 2353 break; 2354 case ICMP6_PARAMPROB_OPTION: 2355 (void)printf("Unrecognized Option "); 2356 break; 2357 default: 2358 (void)printf("Bad code(%d) ", icp->icmp6_code); 2359 break; 2360 } 2361 (void)printf("pointer = 0x%02x\n", 2362 (u_int32_t)ntohl(icp->icmp6_pptr)); 2363 pr_retip((struct ip6_hdr *)(icp + 1), end); 2364 break; 2365 case ICMP6_ECHO_REQUEST: 2366 (void)printf("Echo Request"); 2367 /* XXX ID + Seq + Data */ 2368 break; 2369 case ICMP6_ECHO_REPLY: 2370 (void)printf("Echo Reply"); 2371 /* XXX ID + Seq + Data */ 2372 break; 2373 case ICMP6_MEMBERSHIP_QUERY: 2374 (void)printf("Listener Query"); 2375 break; 2376 case ICMP6_MEMBERSHIP_REPORT: 2377 (void)printf("Listener Report"); 2378 break; 2379 case ICMP6_MEMBERSHIP_REDUCTION: 2380 (void)printf("Listener Done"); 2381 break; 2382 case ND_ROUTER_SOLICIT: 2383 (void)printf("Router Solicitation"); 2384 break; 2385 case ND_ROUTER_ADVERT: 2386 (void)printf("Router Advertisement"); 2387 break; 2388 case ND_NEIGHBOR_SOLICIT: 2389 (void)printf("Neighbor Solicitation"); 2390 break; 2391 case ND_NEIGHBOR_ADVERT: 2392 (void)printf("Neighbor Advertisement"); 2393 break; 2394 case ND_REDIRECT: 2395 red = (struct nd_redirect *)icp; 2396 (void)printf("Redirect\n"); 2397 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2398 sizeof(ntop_buf))) 2399 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2400 (void)printf("Destination: %s", ntop_buf); 2401 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2402 sizeof(ntop_buf))) 2403 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2404 (void)printf(" New Target: %s", ntop_buf); 2405 break; 2406 case ICMP6_NI_QUERY: 2407 (void)printf("Node Information Query"); 2408 /* XXX ID + Seq + Data */ 2409 ni = (struct icmp6_nodeinfo *)icp; 2410 l = end - (u_char *)(ni + 1); 2411 printf(", "); 2412 switch (ntohs(ni->ni_qtype)) { 2413 case NI_QTYPE_NOOP: 2414 (void)printf("NOOP"); 2415 break; 2416 case NI_QTYPE_SUPTYPES: 2417 (void)printf("Supported qtypes"); 2418 break; 2419 case NI_QTYPE_FQDN: 2420 (void)printf("DNS name"); 2421 break; 2422 case NI_QTYPE_NODEADDR: 2423 (void)printf("nodeaddr"); 2424 break; 2425 case NI_QTYPE_IPV4ADDR: 2426 (void)printf("IPv4 nodeaddr"); 2427 break; 2428 default: 2429 (void)printf("unknown qtype"); 2430 break; 2431 } 2432 if (options & F_VERBOSE) { 2433 switch (ni->ni_code) { 2434 case ICMP6_NI_SUBJ_IPV6: 2435 if (l == sizeof(struct in6_addr) && 2436 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2437 sizeof(ntop_buf)) != NULL) { 2438 (void)printf(", subject=%s(%s)", 2439 niqcode[ni->ni_code], ntop_buf); 2440 } else { 2441#if 1 2442 /* backward compat to -W */ 2443 (void)printf(", oldfqdn"); 2444#else 2445 (void)printf(", invalid"); 2446#endif 2447 } 2448 break; 2449 case ICMP6_NI_SUBJ_FQDN: 2450 if (end == (u_char *)(ni + 1)) { 2451 (void)printf(", no subject"); 2452 break; 2453 } 2454 printf(", subject=%s", niqcode[ni->ni_code]); 2455 cp = (const u_char *)(ni + 1); 2456 if (dnsdecode(&cp, end, NULL, dnsname, 2457 sizeof(dnsname)) != NULL) 2458 printf("(%s)", dnsname); 2459 else 2460 printf("(invalid)"); 2461 break; 2462 case ICMP6_NI_SUBJ_IPV4: 2463 if (l == sizeof(struct in_addr) && 2464 inet_ntop(AF_INET, ni + 1, ntop_buf, 2465 sizeof(ntop_buf)) != NULL) { 2466 (void)printf(", subject=%s(%s)", 2467 niqcode[ni->ni_code], ntop_buf); 2468 } else 2469 (void)printf(", invalid"); 2470 break; 2471 default: 2472 (void)printf(", invalid"); 2473 break; 2474 } 2475 } 2476 break; 2477 case ICMP6_NI_REPLY: 2478 (void)printf("Node Information Reply"); 2479 /* XXX ID + Seq + Data */ 2480 ni = (struct icmp6_nodeinfo *)icp; 2481 printf(", "); 2482 switch (ntohs(ni->ni_qtype)) { 2483 case NI_QTYPE_NOOP: 2484 (void)printf("NOOP"); 2485 break; 2486 case NI_QTYPE_SUPTYPES: 2487 (void)printf("Supported qtypes"); 2488 break; 2489 case NI_QTYPE_FQDN: 2490 (void)printf("DNS name"); 2491 break; 2492 case NI_QTYPE_NODEADDR: 2493 (void)printf("nodeaddr"); 2494 break; 2495 case NI_QTYPE_IPV4ADDR: 2496 (void)printf("IPv4 nodeaddr"); 2497 break; 2498 default: 2499 (void)printf("unknown qtype"); 2500 break; 2501 } 2502 if (options & F_VERBOSE) { 2503 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0])) 2504 printf(", invalid"); 2505 else 2506 printf(", %s", nircode[ni->ni_code]); 2507 } 2508 break; 2509 default: 2510 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2511 } 2512} 2513 2514/* 2515 * pr_iph -- 2516 * Print an IP6 header. 2517 */ 2518void 2519pr_iph(struct ip6_hdr *ip6) 2520{ 2521 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2522 u_int8_t tc; 2523 char ntop_buf[INET6_ADDRSTRLEN]; 2524 2525 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2526 tc = (tc >> 4) & 0x0f; 2527 tc |= (ip6->ip6_vfc << 4); 2528 2529 printf("Vr TC Flow Plen Nxt Hlim\n"); 2530 printf(" %1x %02x %05x %04x %02x %02x\n", 2531 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2532 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2533 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2534 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2535 printf("%s->", ntop_buf); 2536 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2537 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2538 printf("%s\n", ntop_buf); 2539} 2540 2541/* 2542 * pr_addr -- 2543 * Return an ascii host address as a dotted quad and optionally with 2544 * a hostname. 2545 */ 2546const char * 2547pr_addr(struct sockaddr *addr, int addrlen) 2548{ 2549 static char buf[NI_MAXHOST]; 2550 int flag = 0; 2551 2552 if ((options & F_HOSTNAME) == 0) 2553 flag |= NI_NUMERICHOST; 2554 2555 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) 2556 return (buf); 2557 else 2558 return "?"; 2559} 2560 2561/* 2562 * pr_retip -- 2563 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2564 */ 2565void 2566pr_retip(struct ip6_hdr *ip6, u_char *end) 2567{ 2568 u_char *cp = (u_char *)ip6, nh; 2569 int hlen; 2570 2571 if (end - (u_char *)ip6 < sizeof(*ip6)) { 2572 printf("IP6"); 2573 goto trunc; 2574 } 2575 pr_iph(ip6); 2576 hlen = sizeof(*ip6); 2577 2578 nh = ip6->ip6_nxt; 2579 cp += hlen; 2580 while (end - cp >= 8) { 2581 switch (nh) { 2582 case IPPROTO_HOPOPTS: 2583 printf("HBH "); 2584 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2585 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2586 break; 2587 case IPPROTO_DSTOPTS: 2588 printf("DSTOPT "); 2589 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2590 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2591 break; 2592 case IPPROTO_FRAGMENT: 2593 printf("FRAG "); 2594 hlen = sizeof(struct ip6_frag); 2595 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2596 break; 2597 case IPPROTO_ROUTING: 2598 printf("RTHDR "); 2599 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2600 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2601 break; 2602#ifdef IPSEC 2603 case IPPROTO_AH: 2604 printf("AH "); 2605 hlen = (((struct ah *)cp)->ah_len+2) << 2; 2606 nh = ((struct ah *)cp)->ah_nxt; 2607 break; 2608#endif 2609 case IPPROTO_ICMPV6: 2610 printf("ICMP6: type = %d, code = %d\n", 2611 *cp, *(cp + 1)); 2612 return; 2613 case IPPROTO_ESP: 2614 printf("ESP\n"); 2615 return; 2616 case IPPROTO_TCP: 2617 printf("TCP: from port %u, to port %u (decimal)\n", 2618 (*cp * 256 + *(cp + 1)), 2619 (*(cp + 2) * 256 + *(cp + 3))); 2620 return; 2621 case IPPROTO_UDP: 2622 printf("UDP: from port %u, to port %u (decimal)\n", 2623 (*cp * 256 + *(cp + 1)), 2624 (*(cp + 2) * 256 + *(cp + 3))); 2625 return; 2626 default: 2627 printf("Unknown Header(%d)\n", nh); 2628 return; 2629 } 2630 2631 if ((cp += hlen) >= end) 2632 goto trunc; 2633 } 2634 if (end - cp < 8) 2635 goto trunc; 2636 2637 putchar('\n'); 2638 return; 2639 2640 trunc: 2641 printf("...\n"); 2642 return; 2643} 2644 2645void 2646fill(char *bp, char *patp) 2647{ 2648 int ii, jj, kk; 2649 int pat[16]; 2650 char *cp; 2651 2652 for (cp = patp; *cp; cp++) 2653 if (!isxdigit(*cp)) 2654 errx(1, "patterns must be specified as hex digits"); 2655 ii = sscanf(patp, 2656 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2657 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2658 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2659 &pat[13], &pat[14], &pat[15]); 2660 2661/* xxx */ 2662 if (ii > 0) 2663 for (kk = 0; 2664 kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii); 2665 kk += ii) 2666 for (jj = 0; jj < ii; ++jj) 2667 bp[jj + kk] = pat[jj]; 2668 if (!(options & F_QUIET)) { 2669 (void)printf("PATTERN: 0x"); 2670 for (jj = 0; jj < ii; ++jj) 2671 (void)printf("%02x", bp[jj] & 0xFF); 2672 (void)printf("\n"); 2673 } 2674} 2675 2676#ifdef IPSEC 2677#ifdef IPSEC_POLICY_IPSEC 2678int 2679setpolicy(int so __unused, char *policy) 2680{ 2681 char *buf; 2682 2683 if (policy == NULL) 2684 return 0; /* ignore */ 2685 2686 buf = ipsec_set_policy(policy, strlen(policy)); 2687 if (buf == NULL) 2688 errx(1, "%s", ipsec_strerror()); 2689 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2690 ipsec_get_policylen(buf)) < 0) 2691 warnx("Unable to set IPsec policy"); 2692 free(buf); 2693 2694 return 0; 2695} 2696#endif 2697#endif 2698 2699char * 2700nigroup(char *name, int nig_oldmcprefix) 2701{ 2702 char *p; 2703 char *q; 2704 MD5_CTX ctxt; 2705 u_int8_t digest[16]; 2706 u_int8_t c; 2707 size_t l; 2708 char hbuf[NI_MAXHOST]; 2709 struct in6_addr in6; 2710 int valid; 2711 2712 p = strchr(name, '.'); 2713 if (!p) 2714 p = name + strlen(name); 2715 l = p - name; 2716 if (l > 63 || l > sizeof(hbuf) - 1) 2717 return NULL; /*label too long*/ 2718 strncpy(hbuf, name, l); 2719 hbuf[(int)l] = '\0'; 2720 2721 for (q = name; *q; q++) { 2722 if (isupper(*(unsigned char *)q)) 2723 *q = tolower(*(unsigned char *)q); 2724 } 2725 2726 /* generate 16 bytes of pseudo-random value. */ 2727 memset(&ctxt, 0, sizeof(ctxt)); 2728 MD5Init(&ctxt); 2729 c = l & 0xff; 2730 MD5Update(&ctxt, &c, sizeof(c)); 2731 MD5Update(&ctxt, (unsigned char *)name, l); 2732 MD5Final(digest, &ctxt); 2733 2734 if (nig_oldmcprefix) { 2735 /* draft-ietf-ipngwg-icmp-name-lookup */ 2736 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6); 2737 } else { 2738 /* RFC 4620 */ 2739 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6); 2740 } 2741 if (valid != 1) 2742 return NULL; /*XXX*/ 2743 2744 if (nig_oldmcprefix) { 2745 /* draft-ietf-ipngwg-icmp-name-lookup */ 2746 bcopy(digest, &in6.s6_addr[12], 4); 2747 } else { 2748 /* RFC 4620 */ 2749 bcopy(digest, &in6.s6_addr[13], 3); 2750 } 2751 2752 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2753 return NULL; 2754 2755 return strdup(hbuf); 2756} 2757 2758void 2759usage(void) 2760{ 2761 (void)fprintf(stderr, 2762#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 2763 "A" 2764#endif 2765 "usage: ping6 [-" 2766 "Dd" 2767#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 2768 "E" 2769#endif 2770 "fH" 2771#ifdef IPV6_USE_MIN_MTU 2772 "m" 2773#endif 2774 "nNoqrRtvwW] " 2775 "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n" 2776 " [-h hoplimit] [-I interface] [-i wait] [-l preload]" 2777#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2778 " [-P policy]" 2779#endif 2780 "\n" 2781 " [-p pattern] [-S sourceaddr] [-s packetsize] " 2782 "[-x waittime]\n" 2783 " [-X timeout] [hops ...] host\n"); 2784 exit(1); 2785} 2786