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("$FreeBSD$"); 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 struct addrinfo hints, *res; 293 struct sigaction si_sa; 294 int cc, i; 295 int almost_done, ch, hold, packlen, preload, optval, error; 296 int nig_oldmcprefix = -1; 297 u_char *datap; 298 char *e, *target, *ifname = NULL, *gateway = NULL; 299 int ip6optlen = 0; 300 struct cmsghdr *scmsgp = NULL; 301 /* For control (ancillary) data received from recvmsg() */ 302 struct cmsghdr cm[CONTROLLEN]; 303#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 304 u_long lsockbufsize; 305 int sockbufsize = 0; 306#endif 307 int usepktinfo = 0; 308 struct in6_pktinfo *pktinfo = NULL; 309#ifdef USE_RFC2292BIS 310 struct ip6_rthdr *rthdr = NULL; 311#endif 312#ifdef IPSEC_POLICY_IPSEC 313 char *policy_in = NULL; 314 char *policy_out = NULL; 315#endif 316 double t; 317 u_long alarmtimeout; 318 size_t rthlen; 319#ifdef IPV6_USE_MIN_MTU 320 int mflag = 0; 321#endif 322 323 /* just to be sure */ 324 memset(&smsghdr, 0, sizeof(smsghdr)); 325 memset(&smsgiov, 0, sizeof(smsgiov)); 326 327 alarmtimeout = preload = 0; 328 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 329#ifndef IPSEC 330#define ADDOPTS 331#else 332#ifdef IPSEC_POLICY_IPSEC 333#define ADDOPTS "P:" 334#else 335#define ADDOPTS "AE" 336#endif /*IPSEC_POLICY_IPSEC*/ 337#endif 338 while ((ch = getopt(argc, argv, 339 "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) { 340#undef ADDOPTS 341 switch (ch) { 342 case 'a': 343 { 344 char *cp; 345 346 options &= ~F_NOUSERDATA; 347 options |= F_NODEADDR; 348 for (cp = optarg; *cp != '\0'; cp++) { 349 switch (*cp) { 350 case 'a': 351 naflags |= NI_NODEADDR_FLAG_ALL; 352 break; 353 case 'c': 354 case 'C': 355 naflags |= NI_NODEADDR_FLAG_COMPAT; 356 break; 357 case 'l': 358 case 'L': 359 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 360 break; 361 case 's': 362 case 'S': 363 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 364 break; 365 case 'g': 366 case 'G': 367 naflags |= NI_NODEADDR_FLAG_GLOBAL; 368 break; 369 case 'A': /* experimental. not in the spec */ 370#ifdef NI_NODEADDR_FLAG_ANYCAST 371 naflags |= NI_NODEADDR_FLAG_ANYCAST; 372 break; 373#else 374 errx(1, 375"-a A is not supported on the platform"); 376 /*NOTREACHED*/ 377#endif 378 default: 379 usage(); 380 /*NOTREACHED*/ 381 } 382 } 383 break; 384 } 385 case 'b': 386#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 387 errno = 0; 388 e = NULL; 389 lsockbufsize = strtoul(optarg, &e, 10); 390 sockbufsize = lsockbufsize; 391 if (errno || !*optarg || *e || 392 sockbufsize != lsockbufsize) 393 errx(1, "invalid socket buffer size"); 394#else 395 errx(1, 396"-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 397#endif 398 break; 399 case 'c': 400 npackets = strtol(optarg, &e, 10); 401 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 402 errx(1, 403 "illegal number of packets -- %s", optarg); 404 break; 405 case 'D': 406 options |= F_DONTFRAG; 407 break; 408 case 'd': 409 options |= F_SO_DEBUG; 410 break; 411 case 'f': 412 if (getuid()) { 413 errno = EPERM; 414 errx(1, "Must be superuser to flood ping"); 415 } 416 options |= F_FLOOD; 417 setbuf(stdout, (char *)NULL); 418 break; 419 case 'g': 420 gateway = optarg; 421 break; 422 case 'H': 423 options |= F_HOSTNAME; 424 break; 425 case 'h': /* hoplimit */ 426 hoplimit = strtol(optarg, &e, 10); 427 if (*optarg == '\0' || *e != '\0') 428 errx(1, "illegal hoplimit %s", optarg); 429 if (255 < hoplimit || hoplimit < -1) 430 errx(1, 431 "illegal hoplimit -- %s", optarg); 432 break; 433 case 'I': 434 ifname = optarg; 435 options |= F_INTERFACE; 436#ifndef USE_SIN6_SCOPE_ID 437 usepktinfo++; 438#endif 439 break; 440 case 'i': /* wait between sending packets */ 441 t = strtod(optarg, &e); 442 if (*optarg == '\0' || *e != '\0') 443 errx(1, "illegal timing interval %s", optarg); 444 if (t < 1 && getuid()) { 445 errx(1, "%s: only root may use interval < 1s", 446 strerror(EPERM)); 447 } 448 intvl.tv_sec = (long)t; 449 intvl.tv_usec = 450 (long)((t - intvl.tv_sec) * 1000000); 451 if (intvl.tv_sec < 0) 452 errx(1, "illegal timing interval %s", optarg); 453 /* less than 1/hz does not make sense */ 454 if (intvl.tv_sec == 0 && intvl.tv_usec < 1) { 455 warnx("too small interval, raised to .000001"); 456 intvl.tv_usec = 1; 457 } 458 options |= F_INTERVAL; 459 break; 460 case 'l': 461 if (getuid()) { 462 errno = EPERM; 463 errx(1, "Must be superuser to preload"); 464 } 465 preload = strtol(optarg, &e, 10); 466 if (preload < 0 || *optarg == '\0' || *e != '\0') 467 errx(1, "illegal preload value -- %s", optarg); 468 break; 469 case 'm': 470#ifdef IPV6_USE_MIN_MTU 471 mflag++; 472 break; 473#else 474 errx(1, "-%c is not supported on this platform", ch); 475 /*NOTREACHED*/ 476#endif 477 case 'n': 478 options &= ~F_HOSTNAME; 479 break; 480 case 'N': 481 options |= F_NIGROUP; 482 nig_oldmcprefix++; 483 break; 484 case 'o': 485 options |= F_ONCE; 486 break; 487 case 'p': /* fill buffer with user pattern */ 488 options |= F_PINGFILLED; 489 fill((char *)datap, optarg); 490 break; 491 case 'q': 492 options |= F_QUIET; 493 break; 494 case 'r': 495 options |= F_AUDIBLE; 496 break; 497 case 'R': 498 options |= F_MISSED; 499 break; 500 case 'S': 501 memset(&hints, 0, sizeof(struct addrinfo)); 502 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ 503 hints.ai_family = AF_INET6; 504 hints.ai_socktype = SOCK_RAW; 505 hints.ai_protocol = IPPROTO_ICMPV6; 506 507 error = getaddrinfo(optarg, NULL, &hints, &res); 508 if (error) { 509 errx(1, "invalid source address: %s", 510 gai_strerror(error)); 511 } 512 /* 513 * res->ai_family must be AF_INET6 and res->ai_addrlen 514 * must be sizeof(src). 515 */ 516 memcpy(&src, res->ai_addr, res->ai_addrlen); 517 srclen = res->ai_addrlen; 518 freeaddrinfo(res); 519 res = NULL; 520 options |= F_SRCADDR; 521 break; 522 case 's': /* size of packet to send */ 523 datalen = strtol(optarg, &e, 10); 524 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 525 errx(1, "illegal datalen value -- %s", optarg); 526 if (datalen > MAXDATALEN) { 527 errx(1, 528 "datalen value too large, maximum is %d", 529 MAXDATALEN); 530 } 531 break; 532 case 't': 533 options &= ~F_NOUSERDATA; 534 options |= F_SUPTYPES; 535 break; 536 case 'v': 537 options |= F_VERBOSE; 538 break; 539 case 'w': 540 options &= ~F_NOUSERDATA; 541 options |= F_FQDN; 542 break; 543 case 'W': 544 options &= ~F_NOUSERDATA; 545 options |= F_FQDNOLD; 546 break; 547 case 'x': 548 t = strtod(optarg, &e); 549 if (*e || e == optarg || t > (double)INT_MAX) 550 err(EX_USAGE, "invalid timing interval: `%s'", 551 optarg); 552 options |= F_WAITTIME; 553 waittime = (int)t; 554 break; 555 case 'X': 556 alarmtimeout = strtoul(optarg, &e, 0); 557 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 558 errx(EX_USAGE, "invalid timeout: `%s'", 559 optarg); 560 if (alarmtimeout > MAXALARM) 561 errx(EX_USAGE, "invalid timeout: `%s' > %d", 562 optarg, MAXALARM); 563 alarm((int)alarmtimeout); 564 break; 565#ifdef IPSEC 566#ifdef IPSEC_POLICY_IPSEC 567 case 'P': 568 options |= F_POLICY; 569 if (!strncmp("in", optarg, 2)) { 570 if ((policy_in = strdup(optarg)) == NULL) 571 errx(1, "strdup"); 572 } else if (!strncmp("out", optarg, 3)) { 573 if ((policy_out = strdup(optarg)) == NULL) 574 errx(1, "strdup"); 575 } else 576 errx(1, "invalid security policy"); 577 break; 578#else 579 case 'A': 580 options |= F_AUTHHDR; 581 break; 582 case 'E': 583 options |= F_ENCRYPT; 584 break; 585#endif /*IPSEC_POLICY_IPSEC*/ 586#endif /*IPSEC*/ 587 default: 588 usage(); 589 /*NOTREACHED*/ 590 } 591 } 592 593 argc -= optind; 594 argv += optind; 595 596 if (argc < 1) { 597 usage(); 598 /*NOTREACHED*/ 599 } 600 601 if (argc > 1) { 602#ifdef IPV6_RECVRTHDR /* 2292bis */ 603 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 604 argc - 1)); 605#else /* RFC2292 */ 606 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 607#endif 608 if (rthlen == 0) { 609 errx(1, "too many intermediate hops"); 610 /*NOTREACHED*/ 611 } 612 ip6optlen += rthlen; 613 } 614 615 if (options & F_NIGROUP) { 616 target = nigroup(argv[argc - 1], nig_oldmcprefix); 617 if (target == NULL) { 618 usage(); 619 /*NOTREACHED*/ 620 } 621 } else 622 target = argv[argc - 1]; 623 624 /* getaddrinfo */ 625 memset(&hints, 0, sizeof(struct addrinfo)); 626 hints.ai_flags = AI_CANONNAME; 627 hints.ai_family = AF_INET6; 628 hints.ai_socktype = SOCK_RAW; 629 hints.ai_protocol = IPPROTO_ICMPV6; 630 631 error = getaddrinfo(target, NULL, &hints, &res); 632 if (error) 633 errx(1, "%s", gai_strerror(error)); 634 if (res->ai_canonname) 635 hostname = res->ai_canonname; 636 else 637 hostname = target; 638 639 if (!res->ai_addr) 640 errx(1, "getaddrinfo failed"); 641 642 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 643 644 if ((s = socket(res->ai_family, res->ai_socktype, 645 res->ai_protocol)) < 0) 646 err(1, "socket"); 647 648 /* set the source address if specified. */ 649 if ((options & F_SRCADDR) && 650 bind(s, (struct sockaddr *)&src, srclen) != 0) { 651 err(1, "bind"); 652 } 653 654 /* set the gateway (next hop) if specified */ 655 if (gateway) { 656 memset(&hints, 0, sizeof(hints)); 657 hints.ai_family = AF_INET6; 658 hints.ai_socktype = SOCK_RAW; 659 hints.ai_protocol = IPPROTO_ICMPV6; 660 661 error = getaddrinfo(gateway, NULL, &hints, &res); 662 if (error) { 663 errx(1, "getaddrinfo for the gateway %s: %s", 664 gateway, gai_strerror(error)); 665 } 666 if (res->ai_next && (options & F_VERBOSE)) 667 warnx("gateway resolves to multiple addresses"); 668 669 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP, 670 res->ai_addr, res->ai_addrlen)) { 671 err(1, "setsockopt(IPV6_NEXTHOP)"); 672 } 673 674 freeaddrinfo(res); 675 } 676 677 /* 678 * let the kerel pass extension headers of incoming packets, 679 * for privileged socket options 680 */ 681 if ((options & F_VERBOSE) != 0) { 682 int opton = 1; 683 684#ifdef IPV6_RECVHOPOPTS 685 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 686 sizeof(opton))) 687 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 688#else /* old adv. API */ 689 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 690 sizeof(opton))) 691 err(1, "setsockopt(IPV6_HOPOPTS)"); 692#endif 693#ifdef IPV6_RECVDSTOPTS 694 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 695 sizeof(opton))) 696 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 697#else /* old adv. API */ 698 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 699 sizeof(opton))) 700 err(1, "setsockopt(IPV6_DSTOPTS)"); 701#endif 702#ifdef IPV6_RECVRTHDRDSTOPTS 703 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 704 sizeof(opton))) 705 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 706#endif 707 } 708 709 /* revoke root privilege */ 710 if (seteuid(getuid()) != 0) 711 err(1, "seteuid() failed"); 712 if (setuid(getuid()) != 0) 713 err(1, "setuid() failed"); 714 715 if ((options & F_FLOOD) && (options & F_INTERVAL)) 716 errx(1, "-f and -i incompatible options"); 717 718 if ((options & F_NOUSERDATA) == 0) { 719 if (datalen >= sizeof(struct tv32)) { 720 /* we can time transfer */ 721 timing = 1; 722 } else 723 timing = 0; 724 /* in F_VERBOSE case, we may get non-echoreply packets*/ 725 if (options & F_VERBOSE) 726 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 727 else 728 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 729 } else { 730 /* suppress timing for node information query */ 731 timing = 0; 732 datalen = 2048; 733 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 734 } 735 736 if (!(packet = (u_char *)malloc((u_int)packlen))) 737 err(1, "Unable to allocate packet"); 738 if (!(options & F_PINGFILLED)) 739 for (i = ICMP6ECHOLEN; i < packlen; ++i) 740 *datap++ = i; 741 742 ident = getpid() & 0xFFFF; 743 arc4random_buf(nonce, sizeof(nonce)); 744 optval = 1; 745 if (options & F_DONTFRAG) 746 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG, 747 &optval, sizeof(optval)) == -1) 748 err(1, "IPV6_DONTFRAG"); 749 hold = 1; 750 751 if (options & F_SO_DEBUG) 752 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 753 sizeof(hold)); 754 optval = IPV6_DEFHLIM; 755 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 756 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 757 &optval, sizeof(optval)) == -1) 758 err(1, "IPV6_MULTICAST_HOPS"); 759#ifdef IPV6_USE_MIN_MTU 760 if (mflag != 1) { 761 optval = mflag > 1 ? 0 : 1; 762 763 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 764 &optval, sizeof(optval)) == -1) 765 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 766 } 767#ifdef IPV6_RECVPATHMTU 768 else { 769 optval = 1; 770 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, 771 &optval, sizeof(optval)) == -1) 772 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 773 } 774#endif /* IPV6_RECVPATHMTU */ 775#endif /* IPV6_USE_MIN_MTU */ 776 777#ifdef IPSEC 778#ifdef IPSEC_POLICY_IPSEC 779 if (options & F_POLICY) { 780 if (setpolicy(s, policy_in) < 0) 781 errx(1, "%s", ipsec_strerror()); 782 if (setpolicy(s, policy_out) < 0) 783 errx(1, "%s", ipsec_strerror()); 784 } 785#else 786 if (options & F_AUTHHDR) { 787 optval = IPSEC_LEVEL_REQUIRE; 788#ifdef IPV6_AUTH_TRANS_LEVEL 789 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 790 &optval, sizeof(optval)) == -1) 791 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 792#else /* old def */ 793 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 794 &optval, sizeof(optval)) == -1) 795 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 796#endif 797 } 798 if (options & F_ENCRYPT) { 799 optval = IPSEC_LEVEL_REQUIRE; 800 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 801 &optval, sizeof(optval)) == -1) 802 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 803 } 804#endif /*IPSEC_POLICY_IPSEC*/ 805#endif 806 807#ifdef ICMP6_FILTER 808 { 809 struct icmp6_filter filt; 810 if (!(options & F_VERBOSE)) { 811 ICMP6_FILTER_SETBLOCKALL(&filt); 812 if ((options & F_FQDN) || (options & F_FQDNOLD) || 813 (options & F_NODEADDR) || (options & F_SUPTYPES)) 814 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 815 else 816 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 817 } else { 818 ICMP6_FILTER_SETPASSALL(&filt); 819 } 820 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 821 sizeof(filt)) < 0) 822 err(1, "setsockopt(ICMP6_FILTER)"); 823 } 824#endif /*ICMP6_FILTER*/ 825 826 /* let the kerel pass extension headers of incoming packets */ 827 if ((options & F_VERBOSE) != 0) { 828 int opton = 1; 829 830#ifdef IPV6_RECVRTHDR 831 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 832 sizeof(opton))) 833 err(1, "setsockopt(IPV6_RECVRTHDR)"); 834#else /* old adv. API */ 835 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton, 836 sizeof(opton))) 837 err(1, "setsockopt(IPV6_RTHDR)"); 838#endif 839 } 840 841/* 842 optval = 1; 843 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 844 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 845 &optval, sizeof(optval)) == -1) 846 err(1, "IPV6_MULTICAST_LOOP"); 847*/ 848 849 /* Specify the outgoing interface and/or the source address */ 850 if (usepktinfo) 851 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 852 853 if (hoplimit != -1) 854 ip6optlen += CMSG_SPACE(sizeof(int)); 855 856 /* set IP6 packet options */ 857 if (ip6optlen) { 858 if ((scmsg = (char *)malloc(ip6optlen)) == 0) 859 errx(1, "can't allocate enough memory"); 860 smsghdr.msg_control = (caddr_t)scmsg; 861 smsghdr.msg_controllen = ip6optlen; 862 scmsgp = (struct cmsghdr *)scmsg; 863 } 864 if (usepktinfo) { 865 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); 866 memset(pktinfo, 0, sizeof(*pktinfo)); 867 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 868 scmsgp->cmsg_level = IPPROTO_IPV6; 869 scmsgp->cmsg_type = IPV6_PKTINFO; 870 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 871 } 872 873 /* set the outgoing interface */ 874 if (ifname) { 875#ifndef USE_SIN6_SCOPE_ID 876 /* pktinfo must have already been allocated */ 877 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0) 878 errx(1, "%s: invalid interface name", ifname); 879#else 880 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 881 errx(1, "%s: invalid interface name", ifname); 882#endif 883 } 884 if (hoplimit != -1) { 885 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 886 scmsgp->cmsg_level = IPPROTO_IPV6; 887 scmsgp->cmsg_type = IPV6_HOPLIMIT; 888 *(int *)(CMSG_DATA(scmsgp)) = hoplimit; 889 890 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 891 } 892 893 if (argc > 1) { /* some intermediate addrs are specified */ 894 int hops; 895#ifdef USE_RFC2292BIS 896 int rthdrlen; 897#endif 898 899#ifdef USE_RFC2292BIS 900 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 901 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 902 scmsgp->cmsg_level = IPPROTO_IPV6; 903 scmsgp->cmsg_type = IPV6_RTHDR; 904 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 905 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 906 IPV6_RTHDR_TYPE_0, argc - 1); 907 if (rthdr == NULL) 908 errx(1, "can't initialize rthdr"); 909#else /* old advanced API */ 910 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp, 911 IPV6_RTHDR_TYPE_0)) == 0) 912 errx(1, "can't initialize rthdr"); 913#endif /* USE_RFC2292BIS */ 914 915 for (hops = 0; hops < argc - 1; hops++) { 916 memset(&hints, 0, sizeof(hints)); 917 hints.ai_family = AF_INET6; 918 919 if ((error = getaddrinfo(argv[hops], NULL, &hints, 920 &res))) 921 errx(1, "%s", gai_strerror(error)); 922 if (res->ai_addr->sa_family != AF_INET6) 923 errx(1, 924 "bad addr family of an intermediate addr"); 925 sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr; 926#ifdef USE_RFC2292BIS 927 if (inet6_rth_add(rthdr, &sin6->sin6_addr)) 928 errx(1, "can't add an intermediate node"); 929#else /* old advanced API */ 930 if (inet6_rthdr_add(scmsg, &sin6->sin6_addr, 931 IPV6_RTHDR_LOOSE)) 932 errx(1, "can't add an intermediate node"); 933#endif /* USE_RFC2292BIS */ 934 freeaddrinfo(res); 935 } 936 937#ifndef USE_RFC2292BIS 938 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE)) 939 errx(1, "can't set the last flag"); 940#endif 941 942 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 943 } 944 945 if (!(options & F_SRCADDR)) { 946 /* 947 * get the source address. XXX since we revoked the root 948 * privilege, we cannot use a raw socket for this. 949 */ 950 int dummy; 951 socklen_t len = sizeof(src); 952 953 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 954 err(1, "UDP socket"); 955 956 src.sin6_family = AF_INET6; 957 src.sin6_addr = dst.sin6_addr; 958 src.sin6_port = ntohs(DUMMY_PORT); 959 src.sin6_scope_id = dst.sin6_scope_id; 960 961#ifdef USE_RFC2292BIS 962 if (pktinfo && 963 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 964 (void *)pktinfo, sizeof(*pktinfo))) 965 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 966 967 if (hoplimit != -1 && 968 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 969 (void *)&hoplimit, sizeof(hoplimit))) 970 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); 971 972 if (hoplimit != -1 && 973 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 974 (void *)&hoplimit, sizeof(hoplimit))) 975 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); 976 977 if (rthdr && 978 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 979 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 980 err(1, "UDP setsockopt(IPV6_RTHDR)"); 981#else /* old advanced API */ 982 if (smsghdr.msg_control && 983 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS, 984 (void *)smsghdr.msg_control, smsghdr.msg_controllen)) 985 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)"); 986#endif 987 988 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 989 err(1, "UDP connect"); 990 991 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 992 err(1, "getsockname"); 993 994 close(dummy); 995 } 996 997#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 998 if (sockbufsize) { 999 if (datalen > sockbufsize) 1000 warnx("you need -b to increase socket buffer size"); 1001 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 1002 sizeof(sockbufsize)) < 0) 1003 err(1, "setsockopt(SO_SNDBUF)"); 1004 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 1005 sizeof(sockbufsize)) < 0) 1006 err(1, "setsockopt(SO_RCVBUF)"); 1007 } 1008 else { 1009 if (datalen > 8 * 1024) /*XXX*/ 1010 warnx("you need -b to increase socket buffer size"); 1011 /* 1012 * When pinging the broadcast address, you can get a lot of 1013 * answers. Doing something so evil is useful if you are trying 1014 * to stress the ethernet, or just want to fill the arp cache 1015 * to get some stuff for /etc/ethers. 1016 */ 1017 hold = 48 * 1024; 1018 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 1019 sizeof(hold)); 1020 } 1021#endif 1022 1023 optval = 1; 1024#ifndef USE_SIN6_SCOPE_ID 1025#ifdef IPV6_RECVPKTINFO 1026 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 1027 sizeof(optval)) < 0) 1028 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 1029#else /* old adv. API */ 1030 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 1031 sizeof(optval)) < 0) 1032 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 1033#endif 1034#endif /* USE_SIN6_SCOPE_ID */ 1035#ifdef IPV6_RECVHOPLIMIT 1036 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 1037 sizeof(optval)) < 0) 1038 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 1039#else /* old adv. API */ 1040 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 1041 sizeof(optval)) < 0) 1042 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 1043#endif 1044 1045 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 1046 (unsigned long)(pingerlen() - 8)); 1047 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 1048 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 1049 1050 if (preload == 0) 1051 pinger(); 1052 else { 1053 if (npackets != 0 && preload > npackets) 1054 preload = npackets; 1055 while (preload--) 1056 pinger(); 1057 } 1058 gettimeofday(&last, NULL); 1059 1060 sigemptyset(&si_sa.sa_mask); 1061 si_sa.sa_flags = 0; 1062 si_sa.sa_handler = onsignal; 1063 if (sigaction(SIGINT, &si_sa, 0) == -1) 1064 err(EX_OSERR, "sigaction SIGINT"); 1065 seenint = 0; 1066#ifdef SIGINFO 1067 if (sigaction(SIGINFO, &si_sa, 0) == -1) 1068 err(EX_OSERR, "sigaction SIGINFO"); 1069 seeninfo = 0; 1070#endif 1071 if (alarmtimeout > 0) { 1072 if (sigaction(SIGALRM, &si_sa, 0) == -1) 1073 err(EX_OSERR, "sigaction SIGALRM"); 1074 } 1075 if (options & F_FLOOD) { 1076 intvl.tv_sec = 0; 1077 intvl.tv_usec = 10000; 1078 } else if ((options & F_INTERVAL) == 0) { 1079 intvl.tv_sec = interval / 1000; 1080 intvl.tv_usec = interval % 1000 * 1000; 1081 } 1082 1083 almost_done = 0; 1084 while (seenint == 0) { 1085 struct timeval now, timeout; 1086 struct msghdr m; 1087 struct iovec iov[2]; 1088 fd_set rfds; 1089 int n; 1090 1091 /* signal handling */ 1092 if (seenint) 1093 onint(SIGINT); 1094#ifdef SIGINFO 1095 if (seeninfo) { 1096 summary(); 1097 seeninfo = 0; 1098 continue; 1099 } 1100#endif 1101 FD_ZERO(&rfds); 1102 FD_SET(s, &rfds); 1103 gettimeofday(&now, NULL); 1104 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 1105 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 1106 while (timeout.tv_usec < 0) { 1107 timeout.tv_usec += 1000000; 1108 timeout.tv_sec--; 1109 } 1110 while (timeout.tv_usec > 1000000) { 1111 timeout.tv_usec -= 1000000; 1112 timeout.tv_sec++; 1113 } 1114 if (timeout.tv_sec < 0) 1115 timeout.tv_sec = timeout.tv_usec = 0; 1116 1117 n = select(s + 1, &rfds, NULL, NULL, &timeout); 1118 if (n < 0) 1119 continue; /* EINTR */ 1120 if (n == 1) { 1121 m.msg_name = (caddr_t)&from; 1122 m.msg_namelen = sizeof(from); 1123 memset(&iov, 0, sizeof(iov)); 1124 iov[0].iov_base = (caddr_t)packet; 1125 iov[0].iov_len = packlen; 1126 m.msg_iov = iov; 1127 m.msg_iovlen = 1; 1128 memset(cm, 0, CONTROLLEN); 1129 m.msg_control = (void *)cm; 1130 m.msg_controllen = CONTROLLEN; 1131 1132 cc = recvmsg(s, &m, 0); 1133 if (cc < 0) { 1134 if (errno != EINTR) { 1135 warn("recvmsg"); 1136 sleep(1); 1137 } 1138 continue; 1139 } else if (cc == 0) { 1140 int mtu; 1141 1142 /* 1143 * receive control messages only. Process the 1144 * exceptions (currently the only possibility is 1145 * a path MTU notification.) 1146 */ 1147 if ((mtu = get_pathmtu(&m)) > 0) { 1148 if ((options & F_VERBOSE) != 0) { 1149 printf("new path MTU (%d) is " 1150 "notified\n", mtu); 1151 } 1152 } 1153 continue; 1154 } else { 1155 /* 1156 * an ICMPv6 message (probably an echoreply) 1157 * arrived. 1158 */ 1159 pr_pack(packet, cc, &m); 1160 } 1161 if (((options & F_ONCE) != 0 && nreceived > 0) || 1162 (npackets > 0 && nreceived >= npackets)) 1163 break; 1164 } 1165 if (n == 0 || (options & F_FLOOD)) { 1166 if (npackets == 0 || ntransmitted < npackets) 1167 pinger(); 1168 else { 1169 if (almost_done) 1170 break; 1171 almost_done = 1; 1172 /* 1173 * If we're not transmitting any more packets, 1174 * change the timer to wait two round-trip times 1175 * if we've received any packets or (waittime) 1176 * milliseconds if we haven't. 1177 */ 1178 intvl.tv_usec = 0; 1179 if (nreceived) { 1180 intvl.tv_sec = 2 * tmax / 1000; 1181 if (intvl.tv_sec == 0) 1182 intvl.tv_sec = 1; 1183 } else { 1184 intvl.tv_sec = waittime / 1000; 1185 intvl.tv_usec = waittime % 1000 * 1000; 1186 } 1187 } 1188 gettimeofday(&last, NULL); 1189 if (ntransmitted - nreceived - 1 > nmissedmax) { 1190 nmissedmax = ntransmitted - nreceived - 1; 1191 if (options & F_MISSED) 1192 (void)write(STDOUT_FILENO, &BBELL, 1); 1193 } 1194 } 1195 } 1196 sigemptyset(&si_sa.sa_mask); 1197 si_sa.sa_flags = 0; 1198 si_sa.sa_handler = SIG_IGN; 1199 sigaction(SIGINT, &si_sa, 0); 1200 sigaction(SIGALRM, &si_sa, 0); 1201 summary(); 1202 1203 if (res != NULL) 1204 freeaddrinfo(res); 1205 1206 if(packet != NULL) 1207 free(packet); 1208 1209 exit(nreceived == 0 ? 2 : 0); 1210} 1211 1212void 1213onsignal(int sig) 1214{ 1215 1216 switch (sig) { 1217 case SIGINT: 1218 case SIGALRM: 1219 seenint++; 1220 break; 1221#ifdef SIGINFO 1222 case SIGINFO: 1223 seeninfo++; 1224 break; 1225#endif 1226 } 1227} 1228 1229/* 1230 * pinger -- 1231 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1232 * will be added on by the kernel. The ID field is our UNIX process ID, 1233 * and the sequence number is an ascending integer. The first 8 bytes 1234 * of the data portion are used to hold a UNIX "timeval" struct in VAX 1235 * byte-order, to compute the round-trip time. 1236 */ 1237size_t 1238pingerlen(void) 1239{ 1240 size_t l; 1241 1242 if (options & F_FQDN) 1243 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1244 else if (options & F_FQDNOLD) 1245 l = ICMP6_NIQLEN; 1246 else if (options & F_NODEADDR) 1247 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1248 else if (options & F_SUPTYPES) 1249 l = ICMP6_NIQLEN; 1250 else 1251 l = ICMP6ECHOLEN + datalen; 1252 1253 return l; 1254} 1255 1256int 1257pinger(void) 1258{ 1259 struct icmp6_hdr *icp; 1260 struct iovec iov[2]; 1261 int i, cc; 1262 struct icmp6_nodeinfo *nip; 1263 int seq; 1264 1265 if (npackets && ntransmitted >= npackets) 1266 return(-1); /* no more transmission */ 1267 1268 icp = (struct icmp6_hdr *)outpack; 1269 nip = (struct icmp6_nodeinfo *)outpack; 1270 memset(icp, 0, sizeof(*icp)); 1271 icp->icmp6_cksum = 0; 1272 seq = ntransmitted++; 1273 CLR(seq % mx_dup_ck); 1274 1275 if (options & F_FQDN) { 1276 icp->icmp6_type = ICMP6_NI_QUERY; 1277 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1278 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1279 nip->ni_flags = htons(0); 1280 1281 memcpy(nip->icmp6_ni_nonce, nonce, 1282 sizeof(nip->icmp6_ni_nonce)); 1283 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1284 1285 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1286 sizeof(dst.sin6_addr)); 1287 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1288 datalen = 0; 1289 } else if (options & F_FQDNOLD) { 1290 /* packet format in 03 draft - no Subject data on queries */ 1291 icp->icmp6_type = ICMP6_NI_QUERY; 1292 icp->icmp6_code = 0; /* code field is always 0 */ 1293 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1294 nip->ni_flags = htons(0); 1295 1296 memcpy(nip->icmp6_ni_nonce, nonce, 1297 sizeof(nip->icmp6_ni_nonce)); 1298 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1299 1300 cc = ICMP6_NIQLEN; 1301 datalen = 0; 1302 } else if (options & F_NODEADDR) { 1303 icp->icmp6_type = ICMP6_NI_QUERY; 1304 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1305 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1306 nip->ni_flags = naflags; 1307 1308 memcpy(nip->icmp6_ni_nonce, nonce, 1309 sizeof(nip->icmp6_ni_nonce)); 1310 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1311 1312 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1313 sizeof(dst.sin6_addr)); 1314 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1315 datalen = 0; 1316 } else if (options & F_SUPTYPES) { 1317 icp->icmp6_type = ICMP6_NI_QUERY; 1318 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1319 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1320 /* we support compressed bitmap */ 1321 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1322 1323 memcpy(nip->icmp6_ni_nonce, nonce, 1324 sizeof(nip->icmp6_ni_nonce)); 1325 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1326 cc = ICMP6_NIQLEN; 1327 datalen = 0; 1328 } else { 1329 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1330 icp->icmp6_code = 0; 1331 icp->icmp6_id = htons(ident); 1332 icp->icmp6_seq = ntohs(seq); 1333 if (timing) { 1334 struct timeval tv; 1335 struct tv32 *tv32; 1336 (void)gettimeofday(&tv, NULL); 1337 tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN]; 1338 tv32->tv32_sec = htonl(tv.tv_sec); 1339 tv32->tv32_usec = htonl(tv.tv_usec); 1340 } 1341 cc = ICMP6ECHOLEN + datalen; 1342 } 1343 1344#ifdef DIAGNOSTIC 1345 if (pingerlen() != cc) 1346 errx(1, "internal error; length mismatch"); 1347#endif 1348 1349 smsghdr.msg_name = (caddr_t)&dst; 1350 smsghdr.msg_namelen = sizeof(dst); 1351 memset(&iov, 0, sizeof(iov)); 1352 iov[0].iov_base = (caddr_t)outpack; 1353 iov[0].iov_len = cc; 1354 smsghdr.msg_iov = iov; 1355 smsghdr.msg_iovlen = 1; 1356 1357 i = sendmsg(s, &smsghdr, 0); 1358 1359 if (i < 0 || i != cc) { 1360 if (i < 0) 1361 warn("sendmsg"); 1362 (void)printf("ping6: wrote %s %d chars, ret=%d\n", 1363 hostname, cc, i); 1364 } 1365 if (!(options & F_QUIET) && options & F_FLOOD) 1366 (void)write(STDOUT_FILENO, &DOT, 1); 1367 1368 return(0); 1369} 1370 1371int 1372myechoreply(const struct icmp6_hdr *icp) 1373{ 1374 if (ntohs(icp->icmp6_id) == ident) 1375 return 1; 1376 else 1377 return 0; 1378} 1379 1380int 1381mynireply(const struct icmp6_nodeinfo *nip) 1382{ 1383 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1384 nonce + sizeof(u_int16_t), 1385 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1386 return 1; 1387 else 1388 return 0; 1389} 1390 1391char * 1392dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf, 1393 size_t bufsiz) 1394 /*base for compressed name*/ 1395{ 1396 int i; 1397 const u_char *cp; 1398 char cresult[MAXDNAME + 1]; 1399 const u_char *comp; 1400 int l; 1401 1402 cp = *sp; 1403 *buf = '\0'; 1404 1405 if (cp >= ep) 1406 return NULL; 1407 while (cp < ep) { 1408 i = *cp; 1409 if (i == 0 || cp != *sp) { 1410 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz) 1411 return NULL; /*result overrun*/ 1412 } 1413 if (i == 0) 1414 break; 1415 cp++; 1416 1417 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1418 /* DNS compression */ 1419 if (!base) 1420 return NULL; 1421 1422 comp = base + (i & 0x3f); 1423 if (dnsdecode(&comp, cp, base, cresult, 1424 sizeof(cresult)) == NULL) 1425 return NULL; 1426 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1427 return NULL; /*result overrun*/ 1428 break; 1429 } else if ((i & 0x3f) == i) { 1430 if (i > ep - cp) 1431 return NULL; /*source overrun*/ 1432 while (i-- > 0 && cp < ep) { 1433 l = snprintf(cresult, sizeof(cresult), 1434 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1435 if (l >= sizeof(cresult) || l < 0) 1436 return NULL; 1437 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1438 return NULL; /*result overrun*/ 1439 cp++; 1440 } 1441 } else 1442 return NULL; /*invalid label*/ 1443 } 1444 if (i != 0) 1445 return NULL; /*not terminated*/ 1446 cp++; 1447 *sp = cp; 1448 return buf; 1449} 1450 1451/* 1452 * pr_pack -- 1453 * Print out the packet, if it came from us. This logic is necessary 1454 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1455 * which arrive ('tis only fair). This permits multiple copies of this 1456 * program to be run without having intermingled output (or statistics!). 1457 */ 1458void 1459pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1460{ 1461#define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1462 struct icmp6_hdr *icp; 1463 struct icmp6_nodeinfo *ni; 1464 int i; 1465 int hoplim; 1466 struct sockaddr *from; 1467 int fromlen; 1468 u_char *cp = NULL, *dp, *end = buf + cc; 1469 struct in6_pktinfo *pktinfo = NULL; 1470 struct timeval tv, tp; 1471 struct tv32 *tpp; 1472 double triptime = 0; 1473 int dupflag; 1474 size_t off; 1475 int oldfqdn; 1476 u_int16_t seq; 1477 char dnsname[MAXDNAME + 1]; 1478 1479 (void)gettimeofday(&tv, NULL); 1480 1481 if (!mhdr || !mhdr->msg_name || 1482 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1483 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1484 if (options & F_VERBOSE) 1485 warnx("invalid peername"); 1486 return; 1487 } 1488 from = (struct sockaddr *)mhdr->msg_name; 1489 fromlen = mhdr->msg_namelen; 1490 if (cc < sizeof(struct icmp6_hdr)) { 1491 if (options & F_VERBOSE) 1492 warnx("packet too short (%d bytes) from %s", cc, 1493 pr_addr(from, fromlen)); 1494 return; 1495 } 1496 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) && 1497 (options & F_VERBOSE) != 0) 1498 warnx("some control data discarded, insufficient buffer size"); 1499 icp = (struct icmp6_hdr *)buf; 1500 ni = (struct icmp6_nodeinfo *)buf; 1501 off = 0; 1502 1503 if ((hoplim = get_hoplim(mhdr)) == -1) { 1504 warnx("failed to get receiving hop limit"); 1505 return; 1506 } 1507 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1508 warnx("failed to get receiving packet information"); 1509 return; 1510 } 1511 1512 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1513 seq = ntohs(icp->icmp6_seq); 1514 ++nreceived; 1515 if (timing) { 1516 tpp = (struct tv32 *)(icp + 1); 1517 tp.tv_sec = ntohl(tpp->tv32_sec); 1518 tp.tv_usec = ntohl(tpp->tv32_usec); 1519 tvsub(&tv, &tp); 1520 triptime = ((double)tv.tv_sec) * 1000.0 + 1521 ((double)tv.tv_usec) / 1000.0; 1522 tsum += triptime; 1523 tsumsq += triptime * triptime; 1524 if (triptime < tmin) 1525 tmin = triptime; 1526 if (triptime > tmax) 1527 tmax = triptime; 1528 } 1529 1530 if (TST(seq % mx_dup_ck)) { 1531 ++nrepeats; 1532 --nreceived; 1533 dupflag = 1; 1534 } else { 1535 SET(seq % mx_dup_ck); 1536 dupflag = 0; 1537 } 1538 1539 if (options & F_QUIET) 1540 return; 1541 1542 if (options & F_WAITTIME && triptime > waittime) { 1543 ++nrcvtimeout; 1544 return; 1545 } 1546 1547 if (options & F_FLOOD) 1548 (void)write(STDOUT_FILENO, &BSPACE, 1); 1549 else { 1550 if (options & F_AUDIBLE) 1551 (void)write(STDOUT_FILENO, &BBELL, 1); 1552 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1553 pr_addr(from, fromlen), seq); 1554 (void)printf(" hlim=%d", hoplim); 1555 if ((options & F_VERBOSE) != 0) { 1556 struct sockaddr_in6 dstsa; 1557 1558 memset(&dstsa, 0, sizeof(dstsa)); 1559 dstsa.sin6_family = AF_INET6; 1560 dstsa.sin6_len = sizeof(dstsa); 1561 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1562 dstsa.sin6_addr = pktinfo->ipi6_addr; 1563 (void)printf(" dst=%s", 1564 pr_addr((struct sockaddr *)&dstsa, 1565 sizeof(dstsa))); 1566 } 1567 if (timing) 1568 (void)printf(" time=%.3f ms", triptime); 1569 if (dupflag) 1570 (void)printf("(DUP!)"); 1571 /* check the data */ 1572 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1573 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1574 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1575 if (*cp != *dp) { 1576 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1577 break; 1578 } 1579 } 1580 } 1581 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1582 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce); 1583 ++nreceived; 1584 if (TST(seq % mx_dup_ck)) { 1585 ++nrepeats; 1586 --nreceived; 1587 dupflag = 1; 1588 } else { 1589 SET(seq % mx_dup_ck); 1590 dupflag = 0; 1591 } 1592 1593 if (options & F_QUIET) 1594 return; 1595 1596 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1597 1598 switch (ntohs(ni->ni_code)) { 1599 case ICMP6_NI_SUCCESS: 1600 break; 1601 case ICMP6_NI_REFUSED: 1602 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1603 goto fqdnend; 1604 case ICMP6_NI_UNKNOWN: 1605 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1606 goto fqdnend; 1607 default: 1608 printf("unknown code 0x%x, type 0x%x", 1609 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1610 goto fqdnend; 1611 } 1612 1613 switch (ntohs(ni->ni_qtype)) { 1614 case NI_QTYPE_NOOP: 1615 printf("NodeInfo NOOP"); 1616 break; 1617 case NI_QTYPE_SUPTYPES: 1618 pr_suptypes(ni, end - (u_char *)ni); 1619 break; 1620 case NI_QTYPE_NODEADDR: 1621 pr_nodeaddr(ni, end - (u_char *)ni); 1622 break; 1623 case NI_QTYPE_FQDN: 1624 default: /* XXX: for backward compatibility */ 1625 cp = (u_char *)ni + ICMP6_NIRLEN; 1626 if (buf[off + ICMP6_NIRLEN] == 1627 cc - off - ICMP6_NIRLEN - 1) 1628 oldfqdn = 1; 1629 else 1630 oldfqdn = 0; 1631 if (oldfqdn) { 1632 cp++; /* skip length */ 1633 while (cp < end) { 1634 safeputc(*cp & 0xff); 1635 cp++; 1636 } 1637 } else { 1638 i = 0; 1639 while (cp < end) { 1640 if (dnsdecode((const u_char **)&cp, end, 1641 (const u_char *)(ni + 1), dnsname, 1642 sizeof(dnsname)) == NULL) { 1643 printf("???"); 1644 break; 1645 } 1646 /* 1647 * name-lookup special handling for 1648 * truncated name 1649 */ 1650 if (cp + 1 <= end && !*cp && 1651 strlen(dnsname) > 0) { 1652 dnsname[strlen(dnsname) - 1] = '\0'; 1653 cp++; 1654 } 1655 printf("%s%s", i > 0 ? "," : "", 1656 dnsname); 1657 } 1658 } 1659 if (options & F_VERBOSE) { 1660 int32_t ttl; 1661 int comma = 0; 1662 1663 (void)printf(" ("); /*)*/ 1664 1665 switch (ni->ni_code) { 1666 case ICMP6_NI_REFUSED: 1667 (void)printf("refused"); 1668 comma++; 1669 break; 1670 case ICMP6_NI_UNKNOWN: 1671 (void)printf("unknown qtype"); 1672 comma++; 1673 break; 1674 } 1675 1676 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1677 /* case of refusion, unknown */ 1678 /*(*/ 1679 putchar(')'); 1680 goto fqdnend; 1681 } 1682 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]); 1683 if (comma) 1684 printf(","); 1685 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1686 (void)printf("TTL=%d:meaningless", 1687 (int)ttl); 1688 } else { 1689 if (ttl < 0) { 1690 (void)printf("TTL=%d:invalid", 1691 ttl); 1692 } else 1693 (void)printf("TTL=%d", ttl); 1694 } 1695 comma++; 1696 1697 if (oldfqdn) { 1698 if (comma) 1699 printf(","); 1700 printf("03 draft"); 1701 comma++; 1702 } else { 1703 cp = (u_char *)ni + ICMP6_NIRLEN; 1704 if (cp == end) { 1705 if (comma) 1706 printf(","); 1707 printf("no name"); 1708 comma++; 1709 } 1710 } 1711 1712 if (buf[off + ICMP6_NIRLEN] != 1713 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1714 if (comma) 1715 printf(","); 1716 (void)printf("invalid namelen:%d/%lu", 1717 buf[off + ICMP6_NIRLEN], 1718 (u_long)cc - off - ICMP6_NIRLEN - 1); 1719 comma++; 1720 } 1721 /*(*/ 1722 putchar(')'); 1723 } 1724 fqdnend: 1725 ; 1726 } 1727 } else { 1728 /* We've got something other than an ECHOREPLY */ 1729 if (!(options & F_VERBOSE)) 1730 return; 1731 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1732 pr_icmph(icp, end); 1733 } 1734 1735 if (!(options & F_FLOOD)) { 1736 (void)putchar('\n'); 1737 if (options & F_VERBOSE) 1738 pr_exthdrs(mhdr); 1739 (void)fflush(stdout); 1740 } 1741#undef safeputc 1742} 1743 1744void 1745pr_exthdrs(struct msghdr *mhdr) 1746{ 1747 ssize_t bufsize; 1748 void *bufp; 1749 struct cmsghdr *cm; 1750 1751 bufsize = 0; 1752 bufp = mhdr->msg_control; 1753 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1754 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1755 if (cm->cmsg_level != IPPROTO_IPV6) 1756 continue; 1757 1758 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp); 1759 if (bufsize <= 0) 1760 continue; 1761 switch (cm->cmsg_type) { 1762 case IPV6_HOPOPTS: 1763 printf(" HbH Options: "); 1764 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1765 break; 1766 case IPV6_DSTOPTS: 1767#ifdef IPV6_RTHDRDSTOPTS 1768 case IPV6_RTHDRDSTOPTS: 1769#endif 1770 printf(" Dst Options: "); 1771 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1772 break; 1773 case IPV6_RTHDR: 1774 printf(" Routing: "); 1775 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize); 1776 break; 1777 } 1778 } 1779} 1780 1781#ifdef USE_RFC2292BIS 1782void 1783pr_ip6opt(void *extbuf, size_t bufsize) 1784{ 1785 struct ip6_hbh *ext; 1786 int currentlen; 1787 u_int8_t type; 1788 socklen_t extlen, len; 1789 void *databuf; 1790 size_t offset; 1791 u_int16_t value2; 1792 u_int32_t value4; 1793 1794 ext = (struct ip6_hbh *)extbuf; 1795 extlen = (ext->ip6h_len + 1) * 8; 1796 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1797 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1798 1799 /* 1800 * Bounds checking on the ancillary data buffer: 1801 * subtract the size of a cmsg structure from the buffer size. 1802 */ 1803 if (bufsize < (extlen + CMSG_SPACE(0))) { 1804 extlen = bufsize - CMSG_SPACE(0); 1805 warnx("options truncated, showing only %u (total=%u)", 1806 (unsigned int)(extlen / 8 - 1), 1807 (unsigned int)(ext->ip6h_len)); 1808 } 1809 1810 currentlen = 0; 1811 while (1) { 1812 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1813 &type, &len, &databuf); 1814 if (currentlen == -1) 1815 break; 1816 switch (type) { 1817 /* 1818 * Note that inet6_opt_next automatically skips any padding 1819 * optins. 1820 */ 1821 case IP6OPT_JUMBO: 1822 offset = 0; 1823 offset = inet6_opt_get_val(databuf, offset, 1824 &value4, sizeof(value4)); 1825 printf(" Jumbo Payload Opt: Length %u\n", 1826 (u_int32_t)ntohl(value4)); 1827 break; 1828 case IP6OPT_ROUTER_ALERT: 1829 offset = 0; 1830 offset = inet6_opt_get_val(databuf, offset, 1831 &value2, sizeof(value2)); 1832 printf(" Router Alert Opt: Type %u\n", 1833 ntohs(value2)); 1834 break; 1835 default: 1836 printf(" Received Opt %u len %lu\n", 1837 type, (unsigned long)len); 1838 break; 1839 } 1840 } 1841 return; 1842} 1843#else /* !USE_RFC2292BIS */ 1844/* ARGSUSED */ 1845void 1846pr_ip6opt(void *extbuf, size_t bufsize __unused) 1847{ 1848 putchar('\n'); 1849 return; 1850} 1851#endif /* USE_RFC2292BIS */ 1852 1853#ifdef USE_RFC2292BIS 1854void 1855pr_rthdr(void *extbuf, size_t bufsize) 1856{ 1857 struct in6_addr *in6; 1858 char ntopbuf[INET6_ADDRSTRLEN]; 1859 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1860 int i, segments, origsegs, rthsize, size0, size1; 1861 1862 /* print fixed part of the header */ 1863 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1864 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1865 if ((segments = inet6_rth_segments(extbuf)) >= 0) { 1866 printf("%d segments, ", segments); 1867 printf("%d left\n", rh->ip6r_segleft); 1868 } else { 1869 printf("segments unknown, "); 1870 printf("%d left\n", rh->ip6r_segleft); 1871 return; 1872 } 1873 1874 /* 1875 * Bounds checking on the ancillary data buffer. When calculating 1876 * the number of items to show keep in mind: 1877 * - The size of the cmsg structure 1878 * - The size of one segment (the size of a Type 0 routing header) 1879 * - When dividing add a fudge factor of one in case the 1880 * dividend is not evenly divisible by the divisor 1881 */ 1882 rthsize = (rh->ip6r_len + 1) * 8; 1883 if (bufsize < (rthsize + CMSG_SPACE(0))) { 1884 origsegs = segments; 1885 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0); 1886 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1); 1887 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) / 1888 (size1 - size0) + 1; 1889 warnx("segments truncated, showing only %d (total=%d)", 1890 segments, origsegs); 1891 } 1892 1893 for (i = 0; i < segments; i++) { 1894 in6 = inet6_rth_getaddr(extbuf, i); 1895 if (in6 == NULL) 1896 printf(" [%d]<NULL>\n", i); 1897 else { 1898 if (!inet_ntop(AF_INET6, in6, ntopbuf, 1899 sizeof(ntopbuf))) 1900 strlcpy(ntopbuf, "?", sizeof(ntopbuf)); 1901 printf(" [%d]%s\n", i, ntopbuf); 1902 } 1903 } 1904 1905 return; 1906 1907} 1908 1909#else /* !USE_RFC2292BIS */ 1910/* ARGSUSED */ 1911void 1912pr_rthdr(void *extbuf, size_t bufsize __unused) 1913{ 1914 putchar('\n'); 1915 return; 1916} 1917#endif /* USE_RFC2292BIS */ 1918 1919int 1920pr_bitrange(u_int32_t v, int soff, int ii) 1921{ 1922 int off; 1923 int i; 1924 1925 off = 0; 1926 while (off < 32) { 1927 /* shift till we have 0x01 */ 1928 if ((v & 0x01) == 0) { 1929 if (ii > 1) 1930 printf("-%u", soff + off - 1); 1931 ii = 0; 1932 switch (v & 0x0f) { 1933 case 0x00: 1934 v >>= 4; 1935 off += 4; 1936 continue; 1937 case 0x08: 1938 v >>= 3; 1939 off += 3; 1940 continue; 1941 case 0x04: case 0x0c: 1942 v >>= 2; 1943 off += 2; 1944 continue; 1945 default: 1946 v >>= 1; 1947 off += 1; 1948 continue; 1949 } 1950 } 1951 1952 /* we have 0x01 with us */ 1953 for (i = 0; i < 32 - off; i++) { 1954 if ((v & (0x01 << i)) == 0) 1955 break; 1956 } 1957 if (!ii) 1958 printf(" %u", soff + off); 1959 ii += i; 1960 v >>= i; off += i; 1961 } 1962 return ii; 1963} 1964 1965void 1966pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 1967 /* ni->qtype must be SUPTYPES */ 1968{ 1969 size_t clen; 1970 u_int32_t v; 1971 const u_char *cp, *end; 1972 u_int16_t cur; 1973 struct cbit { 1974 u_int16_t words; /*32bit count*/ 1975 u_int16_t skip; 1976 } cbit; 1977#define MAXQTYPES (1 << 16) 1978 size_t off; 1979 int b; 1980 1981 cp = (u_char *)(ni + 1); 1982 end = ((u_char *)ni) + nilen; 1983 cur = 0; 1984 b = 0; 1985 1986 printf("NodeInfo Supported Qtypes"); 1987 if (options & F_VERBOSE) { 1988 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 1989 printf(", compressed bitmap"); 1990 else 1991 printf(", raw bitmap"); 1992 } 1993 1994 while (cp < end) { 1995 clen = (size_t)(end - cp); 1996 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 1997 if (clen == 0 || clen > MAXQTYPES / 8 || 1998 clen % sizeof(v)) { 1999 printf("???"); 2000 return; 2001 } 2002 } else { 2003 if (clen < sizeof(cbit) || clen % sizeof(v)) 2004 return; 2005 memcpy(&cbit, cp, sizeof(cbit)); 2006 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 2007 clen) 2008 return; 2009 cp += sizeof(cbit); 2010 clen = ntohs(cbit.words) * sizeof(v); 2011 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 2012 MAXQTYPES) 2013 return; 2014 } 2015 2016 for (off = 0; off < clen; off += sizeof(v)) { 2017 memcpy(&v, cp + off, sizeof(v)); 2018 v = (u_int32_t)ntohl(v); 2019 b = pr_bitrange(v, (int)(cur + off * 8), b); 2020 } 2021 /* flush the remaining bits */ 2022 b = pr_bitrange(0, (int)(cur + off * 8), b); 2023 2024 cp += clen; 2025 cur += clen * 8; 2026 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 2027 cur += ntohs(cbit.skip) * 32; 2028 } 2029} 2030 2031void 2032pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 2033 /* ni->qtype must be NODEADDR */ 2034{ 2035 u_char *cp = (u_char *)(ni + 1); 2036 char ntop_buf[INET6_ADDRSTRLEN]; 2037 int withttl = 0; 2038 2039 nilen -= sizeof(struct icmp6_nodeinfo); 2040 2041 if (options & F_VERBOSE) { 2042 switch (ni->ni_code) { 2043 case ICMP6_NI_REFUSED: 2044 (void)printf("refused"); 2045 break; 2046 case ICMP6_NI_UNKNOWN: 2047 (void)printf("unknown qtype"); 2048 break; 2049 } 2050 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 2051 (void)printf(" truncated"); 2052 } 2053 putchar('\n'); 2054 if (nilen <= 0) 2055 printf(" no address\n"); 2056 2057 /* 2058 * In icmp-name-lookups 05 and later, TTL of each returned address 2059 * is contained in the resposne. We try to detect the version 2060 * by the length of the data, but note that the detection algorithm 2061 * is incomplete. We assume the latest draft by default. 2062 */ 2063 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 2064 withttl = 1; 2065 while (nilen > 0) { 2066 u_int32_t ttl; 2067 2068 if (withttl) { 2069 /* XXX: alignment? */ 2070 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp); 2071 cp += sizeof(u_int32_t); 2072 nilen -= sizeof(u_int32_t); 2073 } 2074 2075 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 2076 NULL) 2077 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2078 printf(" %s", ntop_buf); 2079 if (withttl) { 2080 if (ttl == 0xffffffff) { 2081 /* 2082 * XXX: can this convention be applied to all 2083 * type of TTL (i.e. non-ND TTL)? 2084 */ 2085 printf("(TTL=infty)"); 2086 } 2087 else 2088 printf("(TTL=%u)", ttl); 2089 } 2090 putchar('\n'); 2091 2092 nilen -= sizeof(struct in6_addr); 2093 cp += sizeof(struct in6_addr); 2094 } 2095} 2096 2097int 2098get_hoplim(struct msghdr *mhdr) 2099{ 2100 struct cmsghdr *cm; 2101 2102 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2103 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2104 if (cm->cmsg_len == 0) 2105 return(-1); 2106 2107 if (cm->cmsg_level == IPPROTO_IPV6 && 2108 cm->cmsg_type == IPV6_HOPLIMIT && 2109 cm->cmsg_len == CMSG_LEN(sizeof(int))) 2110 return(*(int *)CMSG_DATA(cm)); 2111 } 2112 2113 return(-1); 2114} 2115 2116struct in6_pktinfo * 2117get_rcvpktinfo(struct msghdr *mhdr) 2118{ 2119 struct cmsghdr *cm; 2120 2121 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2122 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2123 if (cm->cmsg_len == 0) 2124 return(NULL); 2125 2126 if (cm->cmsg_level == IPPROTO_IPV6 && 2127 cm->cmsg_type == IPV6_PKTINFO && 2128 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) 2129 return((struct in6_pktinfo *)CMSG_DATA(cm)); 2130 } 2131 2132 return(NULL); 2133} 2134 2135int 2136get_pathmtu(struct msghdr *mhdr) 2137{ 2138#ifdef IPV6_RECVPATHMTU 2139 struct cmsghdr *cm; 2140 struct ip6_mtuinfo *mtuctl = NULL; 2141 2142 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2143 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2144 if (cm->cmsg_len == 0) 2145 return(0); 2146 2147 if (cm->cmsg_level == IPPROTO_IPV6 && 2148 cm->cmsg_type == IPV6_PATHMTU && 2149 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2150 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm); 2151 2152 /* 2153 * If the notified destination is different from 2154 * the one we are pinging, just ignore the info. 2155 * We check the scope ID only when both notified value 2156 * and our own value have non-0 values, because we may 2157 * have used the default scope zone ID for sending, 2158 * in which case the scope ID value is 0. 2159 */ 2160 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr, 2161 &dst.sin6_addr) || 2162 (mtuctl->ip6m_addr.sin6_scope_id && 2163 dst.sin6_scope_id && 2164 mtuctl->ip6m_addr.sin6_scope_id != 2165 dst.sin6_scope_id)) { 2166 if ((options & F_VERBOSE) != 0) { 2167 printf("path MTU for %s is notified. " 2168 "(ignored)\n", 2169 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr, 2170 sizeof(mtuctl->ip6m_addr))); 2171 } 2172 return(0); 2173 } 2174 2175 /* 2176 * Ignore an invalid MTU. XXX: can we just believe 2177 * the kernel check? 2178 */ 2179 if (mtuctl->ip6m_mtu < IPV6_MMTU) 2180 return(0); 2181 2182 /* notification for our destination. return the MTU. */ 2183 return((int)mtuctl->ip6m_mtu); 2184 } 2185 } 2186#endif 2187 return(0); 2188} 2189 2190/* 2191 * tvsub -- 2192 * Subtract 2 timeval structs: out = out - in. Out is assumed to 2193 * be >= in. 2194 */ 2195void 2196tvsub(struct timeval *out, struct timeval *in) 2197{ 2198 if ((out->tv_usec -= in->tv_usec) < 0) { 2199 --out->tv_sec; 2200 out->tv_usec += 1000000; 2201 } 2202 out->tv_sec -= in->tv_sec; 2203} 2204 2205/* 2206 * onint -- 2207 * SIGINT handler. 2208 */ 2209/* ARGSUSED */ 2210void 2211onint(int notused __unused) 2212{ 2213 /* 2214 * When doing reverse DNS lookups, the seenint flag might not 2215 * be noticed for a while. Just exit if we get a second SIGINT. 2216 */ 2217 if ((options & F_HOSTNAME) && seenint != 0) 2218 _exit(nreceived ? 0 : 2); 2219} 2220 2221/* 2222 * summary -- 2223 * Print out statistics. 2224 */ 2225void 2226summary(void) 2227{ 2228 2229 (void)printf("\n--- %s ping6 statistics ---\n", hostname); 2230 (void)printf("%ld packets transmitted, ", ntransmitted); 2231 (void)printf("%ld packets received, ", nreceived); 2232 if (nrepeats) 2233 (void)printf("+%ld duplicates, ", nrepeats); 2234 if (ntransmitted) { 2235 if (nreceived > ntransmitted) 2236 (void)printf("-- somebody's duplicating packets!"); 2237 else 2238 (void)printf("%.1f%% packet loss", 2239 ((((double)ntransmitted - nreceived) * 100.0) / 2240 ntransmitted)); 2241 } 2242 if (nrcvtimeout) 2243 printf(", %ld packets out of wait time", nrcvtimeout); 2244 (void)putchar('\n'); 2245 if (nreceived && timing) { 2246 /* Only display average to microseconds */ 2247 double num = nreceived + nrepeats; 2248 double avg = tsum / num; 2249 double dev = sqrt(tsumsq / num - avg * avg); 2250 (void)printf( 2251 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2252 tmin, avg, tmax, dev); 2253 (void)fflush(stdout); 2254 } 2255 (void)fflush(stdout); 2256} 2257 2258/*subject type*/ 2259static const char *niqcode[] = { 2260 "IPv6 address", 2261 "DNS label", /*or empty*/ 2262 "IPv4 address", 2263}; 2264 2265/*result code*/ 2266static const char *nircode[] = { 2267 "Success", "Refused", "Unknown", 2268}; 2269 2270 2271/* 2272 * pr_icmph -- 2273 * Print a descriptive string about an ICMP header. 2274 */ 2275void 2276pr_icmph(struct icmp6_hdr *icp, u_char *end) 2277{ 2278 char ntop_buf[INET6_ADDRSTRLEN]; 2279 struct nd_redirect *red; 2280 struct icmp6_nodeinfo *ni; 2281 char dnsname[MAXDNAME + 1]; 2282 const u_char *cp; 2283 size_t l; 2284 2285 switch (icp->icmp6_type) { 2286 case ICMP6_DST_UNREACH: 2287 switch (icp->icmp6_code) { 2288 case ICMP6_DST_UNREACH_NOROUTE: 2289 (void)printf("No Route to Destination\n"); 2290 break; 2291 case ICMP6_DST_UNREACH_ADMIN: 2292 (void)printf("Destination Administratively " 2293 "Unreachable\n"); 2294 break; 2295 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2296 (void)printf("Destination Unreachable Beyond Scope\n"); 2297 break; 2298 case ICMP6_DST_UNREACH_ADDR: 2299 (void)printf("Destination Host Unreachable\n"); 2300 break; 2301 case ICMP6_DST_UNREACH_NOPORT: 2302 (void)printf("Destination Port Unreachable\n"); 2303 break; 2304 default: 2305 (void)printf("Destination Unreachable, Bad Code: %d\n", 2306 icp->icmp6_code); 2307 break; 2308 } 2309 /* Print returned IP header information */ 2310 pr_retip((struct ip6_hdr *)(icp + 1), end); 2311 break; 2312 case ICMP6_PACKET_TOO_BIG: 2313 (void)printf("Packet too big mtu = %d\n", 2314 (int)ntohl(icp->icmp6_mtu)); 2315 pr_retip((struct ip6_hdr *)(icp + 1), end); 2316 break; 2317 case ICMP6_TIME_EXCEEDED: 2318 switch (icp->icmp6_code) { 2319 case ICMP6_TIME_EXCEED_TRANSIT: 2320 (void)printf("Time to live exceeded\n"); 2321 break; 2322 case ICMP6_TIME_EXCEED_REASSEMBLY: 2323 (void)printf("Frag reassembly time exceeded\n"); 2324 break; 2325 default: 2326 (void)printf("Time exceeded, Bad Code: %d\n", 2327 icp->icmp6_code); 2328 break; 2329 } 2330 pr_retip((struct ip6_hdr *)(icp + 1), end); 2331 break; 2332 case ICMP6_PARAM_PROB: 2333 (void)printf("Parameter problem: "); 2334 switch (icp->icmp6_code) { 2335 case ICMP6_PARAMPROB_HEADER: 2336 (void)printf("Erroneous Header "); 2337 break; 2338 case ICMP6_PARAMPROB_NEXTHEADER: 2339 (void)printf("Unknown Nextheader "); 2340 break; 2341 case ICMP6_PARAMPROB_OPTION: 2342 (void)printf("Unrecognized Option "); 2343 break; 2344 default: 2345 (void)printf("Bad code(%d) ", icp->icmp6_code); 2346 break; 2347 } 2348 (void)printf("pointer = 0x%02x\n", 2349 (u_int32_t)ntohl(icp->icmp6_pptr)); 2350 pr_retip((struct ip6_hdr *)(icp + 1), end); 2351 break; 2352 case ICMP6_ECHO_REQUEST: 2353 (void)printf("Echo Request"); 2354 /* XXX ID + Seq + Data */ 2355 break; 2356 case ICMP6_ECHO_REPLY: 2357 (void)printf("Echo Reply"); 2358 /* XXX ID + Seq + Data */ 2359 break; 2360 case ICMP6_MEMBERSHIP_QUERY: 2361 (void)printf("Listener Query"); 2362 break; 2363 case ICMP6_MEMBERSHIP_REPORT: 2364 (void)printf("Listener Report"); 2365 break; 2366 case ICMP6_MEMBERSHIP_REDUCTION: 2367 (void)printf("Listener Done"); 2368 break; 2369 case ND_ROUTER_SOLICIT: 2370 (void)printf("Router Solicitation"); 2371 break; 2372 case ND_ROUTER_ADVERT: 2373 (void)printf("Router Advertisement"); 2374 break; 2375 case ND_NEIGHBOR_SOLICIT: 2376 (void)printf("Neighbor Solicitation"); 2377 break; 2378 case ND_NEIGHBOR_ADVERT: 2379 (void)printf("Neighbor Advertisement"); 2380 break; 2381 case ND_REDIRECT: 2382 red = (struct nd_redirect *)icp; 2383 (void)printf("Redirect\n"); 2384 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2385 sizeof(ntop_buf))) 2386 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2387 (void)printf("Destination: %s", ntop_buf); 2388 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2389 sizeof(ntop_buf))) 2390 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2391 (void)printf(" New Target: %s", ntop_buf); 2392 break; 2393 case ICMP6_NI_QUERY: 2394 (void)printf("Node Information Query"); 2395 /* XXX ID + Seq + Data */ 2396 ni = (struct icmp6_nodeinfo *)icp; 2397 l = end - (u_char *)(ni + 1); 2398 printf(", "); 2399 switch (ntohs(ni->ni_qtype)) { 2400 case NI_QTYPE_NOOP: 2401 (void)printf("NOOP"); 2402 break; 2403 case NI_QTYPE_SUPTYPES: 2404 (void)printf("Supported qtypes"); 2405 break; 2406 case NI_QTYPE_FQDN: 2407 (void)printf("DNS name"); 2408 break; 2409 case NI_QTYPE_NODEADDR: 2410 (void)printf("nodeaddr"); 2411 break; 2412 case NI_QTYPE_IPV4ADDR: 2413 (void)printf("IPv4 nodeaddr"); 2414 break; 2415 default: 2416 (void)printf("unknown qtype"); 2417 break; 2418 } 2419 if (options & F_VERBOSE) { 2420 switch (ni->ni_code) { 2421 case ICMP6_NI_SUBJ_IPV6: 2422 if (l == sizeof(struct in6_addr) && 2423 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2424 sizeof(ntop_buf)) != NULL) { 2425 (void)printf(", subject=%s(%s)", 2426 niqcode[ni->ni_code], ntop_buf); 2427 } else { 2428#if 1 2429 /* backward compat to -W */ 2430 (void)printf(", oldfqdn"); 2431#else 2432 (void)printf(", invalid"); 2433#endif 2434 } 2435 break; 2436 case ICMP6_NI_SUBJ_FQDN: 2437 if (end == (u_char *)(ni + 1)) { 2438 (void)printf(", no subject"); 2439 break; 2440 } 2441 printf(", subject=%s", niqcode[ni->ni_code]); 2442 cp = (const u_char *)(ni + 1); 2443 if (dnsdecode(&cp, end, NULL, dnsname, 2444 sizeof(dnsname)) != NULL) 2445 printf("(%s)", dnsname); 2446 else 2447 printf("(invalid)"); 2448 break; 2449 case ICMP6_NI_SUBJ_IPV4: 2450 if (l == sizeof(struct in_addr) && 2451 inet_ntop(AF_INET, ni + 1, ntop_buf, 2452 sizeof(ntop_buf)) != NULL) { 2453 (void)printf(", subject=%s(%s)", 2454 niqcode[ni->ni_code], ntop_buf); 2455 } else 2456 (void)printf(", invalid"); 2457 break; 2458 default: 2459 (void)printf(", invalid"); 2460 break; 2461 } 2462 } 2463 break; 2464 case ICMP6_NI_REPLY: 2465 (void)printf("Node Information Reply"); 2466 /* XXX ID + Seq + Data */ 2467 ni = (struct icmp6_nodeinfo *)icp; 2468 printf(", "); 2469 switch (ntohs(ni->ni_qtype)) { 2470 case NI_QTYPE_NOOP: 2471 (void)printf("NOOP"); 2472 break; 2473 case NI_QTYPE_SUPTYPES: 2474 (void)printf("Supported qtypes"); 2475 break; 2476 case NI_QTYPE_FQDN: 2477 (void)printf("DNS name"); 2478 break; 2479 case NI_QTYPE_NODEADDR: 2480 (void)printf("nodeaddr"); 2481 break; 2482 case NI_QTYPE_IPV4ADDR: 2483 (void)printf("IPv4 nodeaddr"); 2484 break; 2485 default: 2486 (void)printf("unknown qtype"); 2487 break; 2488 } 2489 if (options & F_VERBOSE) { 2490 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0])) 2491 printf(", invalid"); 2492 else 2493 printf(", %s", nircode[ni->ni_code]); 2494 } 2495 break; 2496 default: 2497 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2498 } 2499} 2500 2501/* 2502 * pr_iph -- 2503 * Print an IP6 header. 2504 */ 2505void 2506pr_iph(struct ip6_hdr *ip6) 2507{ 2508 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2509 u_int8_t tc; 2510 char ntop_buf[INET6_ADDRSTRLEN]; 2511 2512 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2513 tc = (tc >> 4) & 0x0f; 2514 tc |= (ip6->ip6_vfc << 4); 2515 2516 printf("Vr TC Flow Plen Nxt Hlim\n"); 2517 printf(" %1x %02x %05x %04x %02x %02x\n", 2518 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2519 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2520 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2521 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2522 printf("%s->", ntop_buf); 2523 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2524 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2525 printf("%s\n", ntop_buf); 2526} 2527 2528/* 2529 * pr_addr -- 2530 * Return an ascii host address as a dotted quad and optionally with 2531 * a hostname. 2532 */ 2533const char * 2534pr_addr(struct sockaddr *addr, int addrlen) 2535{ 2536 static char buf[NI_MAXHOST]; 2537 int flag = 0; 2538 2539 if ((options & F_HOSTNAME) == 0) 2540 flag |= NI_NUMERICHOST; 2541 2542 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) 2543 return (buf); 2544 else 2545 return "?"; 2546} 2547 2548/* 2549 * pr_retip -- 2550 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2551 */ 2552void 2553pr_retip(struct ip6_hdr *ip6, u_char *end) 2554{ 2555 u_char *cp = (u_char *)ip6, nh; 2556 int hlen; 2557 2558 if (end - (u_char *)ip6 < sizeof(*ip6)) { 2559 printf("IP6"); 2560 goto trunc; 2561 } 2562 pr_iph(ip6); 2563 hlen = sizeof(*ip6); 2564 2565 nh = ip6->ip6_nxt; 2566 cp += hlen; 2567 while (end - cp >= 8) { 2568 switch (nh) { 2569 case IPPROTO_HOPOPTS: 2570 printf("HBH "); 2571 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2572 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2573 break; 2574 case IPPROTO_DSTOPTS: 2575 printf("DSTOPT "); 2576 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2577 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2578 break; 2579 case IPPROTO_FRAGMENT: 2580 printf("FRAG "); 2581 hlen = sizeof(struct ip6_frag); 2582 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2583 break; 2584 case IPPROTO_ROUTING: 2585 printf("RTHDR "); 2586 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2587 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2588 break; 2589#ifdef IPSEC 2590 case IPPROTO_AH: 2591 printf("AH "); 2592 hlen = (((struct ah *)cp)->ah_len+2) << 2; 2593 nh = ((struct ah *)cp)->ah_nxt; 2594 break; 2595#endif 2596 case IPPROTO_ICMPV6: 2597 printf("ICMP6: type = %d, code = %d\n", 2598 *cp, *(cp + 1)); 2599 return; 2600 case IPPROTO_ESP: 2601 printf("ESP\n"); 2602 return; 2603 case IPPROTO_TCP: 2604 printf("TCP: from port %u, to port %u (decimal)\n", 2605 (*cp * 256 + *(cp + 1)), 2606 (*(cp + 2) * 256 + *(cp + 3))); 2607 return; 2608 case IPPROTO_UDP: 2609 printf("UDP: from port %u, to port %u (decimal)\n", 2610 (*cp * 256 + *(cp + 1)), 2611 (*(cp + 2) * 256 + *(cp + 3))); 2612 return; 2613 default: 2614 printf("Unknown Header(%d)\n", nh); 2615 return; 2616 } 2617 2618 if ((cp += hlen) >= end) 2619 goto trunc; 2620 } 2621 if (end - cp < 8) 2622 goto trunc; 2623 2624 putchar('\n'); 2625 return; 2626 2627 trunc: 2628 printf("...\n"); 2629 return; 2630} 2631 2632void 2633fill(char *bp, char *patp) 2634{ 2635 int ii, jj, kk; 2636 int pat[16]; 2637 char *cp; 2638 2639 for (cp = patp; *cp; cp++) 2640 if (!isxdigit(*cp)) 2641 errx(1, "patterns must be specified as hex digits"); 2642 ii = sscanf(patp, 2643 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2644 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2645 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2646 &pat[13], &pat[14], &pat[15]); 2647 2648/* xxx */ 2649 if (ii > 0) 2650 for (kk = 0; 2651 kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii); 2652 kk += ii) 2653 for (jj = 0; jj < ii; ++jj) 2654 bp[jj + kk] = pat[jj]; 2655 if (!(options & F_QUIET)) { 2656 (void)printf("PATTERN: 0x"); 2657 for (jj = 0; jj < ii; ++jj) 2658 (void)printf("%02x", bp[jj] & 0xFF); 2659 (void)printf("\n"); 2660 } 2661} 2662 2663#ifdef IPSEC 2664#ifdef IPSEC_POLICY_IPSEC 2665int 2666setpolicy(int so __unused, char *policy) 2667{ 2668 char *buf; 2669 2670 if (policy == NULL) 2671 return 0; /* ignore */ 2672 2673 buf = ipsec_set_policy(policy, strlen(policy)); 2674 if (buf == NULL) 2675 errx(1, "%s", ipsec_strerror()); 2676 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2677 ipsec_get_policylen(buf)) < 0) 2678 warnx("Unable to set IPsec policy"); 2679 free(buf); 2680 2681 return 0; 2682} 2683#endif 2684#endif 2685 2686char * 2687nigroup(char *name, int nig_oldmcprefix) 2688{ 2689 char *p; 2690 char *q; 2691 MD5_CTX ctxt; 2692 u_int8_t digest[16]; 2693 u_int8_t c; 2694 size_t l; 2695 char hbuf[NI_MAXHOST]; 2696 struct in6_addr in6; 2697 int valid; 2698 2699 p = strchr(name, '.'); 2700 if (!p) 2701 p = name + strlen(name); 2702 l = p - name; 2703 if (l > 63 || l > sizeof(hbuf) - 1) 2704 return NULL; /*label too long*/ 2705 strncpy(hbuf, name, l); 2706 hbuf[(int)l] = '\0'; 2707 2708 for (q = name; *q; q++) { 2709 if (isupper(*(unsigned char *)q)) 2710 *q = tolower(*(unsigned char *)q); 2711 } 2712 2713 /* generate 16 bytes of pseudo-random value. */ 2714 memset(&ctxt, 0, sizeof(ctxt)); 2715 MD5Init(&ctxt); 2716 c = l & 0xff; 2717 MD5Update(&ctxt, &c, sizeof(c)); 2718 MD5Update(&ctxt, (unsigned char *)name, l); 2719 MD5Final(digest, &ctxt); 2720 2721 if (nig_oldmcprefix) { 2722 /* draft-ietf-ipngwg-icmp-name-lookup */ 2723 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6); 2724 } else { 2725 /* RFC 4620 */ 2726 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6); 2727 } 2728 if (valid != 1) 2729 return NULL; /*XXX*/ 2730 2731 if (nig_oldmcprefix) { 2732 /* draft-ietf-ipngwg-icmp-name-lookup */ 2733 bcopy(digest, &in6.s6_addr[12], 4); 2734 } else { 2735 /* RFC 4620 */ 2736 bcopy(digest, &in6.s6_addr[13], 3); 2737 } 2738 2739 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2740 return NULL; 2741 2742 return strdup(hbuf); 2743} 2744 2745void 2746usage(void) 2747{ 2748 (void)fprintf(stderr, 2749#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 2750 "A" 2751#endif 2752 "usage: ping6 [-" 2753 "Dd" 2754#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 2755 "E" 2756#endif 2757 "fH" 2758#ifdef IPV6_USE_MIN_MTU 2759 "m" 2760#endif 2761 "nNoqrRtvwW] " 2762 "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n" 2763 " [-h hoplimit] [-I interface] [-i wait] [-l preload]" 2764#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2765 " [-P policy]" 2766#endif 2767 "\n" 2768 " [-p pattern] [-S sourceaddr] [-s packetsize] " 2769 "[-x waittime]\n" 2770 " [-X timeout] [hops ...] host\n"); 2771 exit(1); 2772} 2773