ping6.c revision 269800
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 269800 2014-08-11 06:54:07Z delphij $"); 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 <unistd.h> 129#ifdef HAVE_POLL_H 130#include <poll.h> 131#endif 132 133#ifdef IPSEC 134#include <netipsec/ah.h> 135#include <netipsec/ipsec.h> 136#endif 137 138#include <md5.h> 139 140struct tv32 { 141 u_int32_t tv32_sec; 142 u_int32_t tv32_usec; 143}; 144 145#define MAXPACKETLEN 131072 146#define IP6LEN 40 147#define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 148#define ICMP6ECHOTMLEN sizeof(struct tv32) 149#define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 150# define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */ 151/* FQDN case, 64 bits of nonce + 32 bits ttl */ 152#define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 153#define EXTRA 256 /* for AH and various other headers. weird. */ 154#define DEFDATALEN ICMP6ECHOTMLEN 155#define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 156#define NROUTES 9 /* number of record route slots */ 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) 193u_int options; 194 195#define IN6LEN sizeof(struct in6_addr) 196#define SA6LEN sizeof(struct sockaddr_in6) 197#define DUMMY_PORT 10101 198 199#define SIN6(s) ((struct sockaddr_in6 *)(s)) 200 201/* 202 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 203 * number of received sequence numbers we can keep track of. Change 128 204 * to 8192 for complete accuracy... 205 */ 206#define MAX_DUP_CHK (8 * 8192) 207int mx_dup_ck = MAX_DUP_CHK; 208char rcvd_tbl[MAX_DUP_CHK / 8]; 209 210struct addrinfo *res = NULL; 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#ifdef HAVE_POLL_H 227struct pollfd fdmaskp[1]; 228#else 229fd_set *fdmaskp = NULL; 230int fdmasks; 231#endif 232 233/* counters */ 234long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 235long npackets; /* max packets to transmit */ 236long nreceived; /* # of packets we got back */ 237long nrepeats; /* number of duplicates */ 238long ntransmitted; /* sequence # for outbound packets = #sent */ 239struct timeval interval = {1, 0}; /* interval between packets */ 240 241/* timing */ 242int timing; /* flag to do timing */ 243double tmin = 999999999.0; /* minimum round trip time */ 244double tmax = 0.0; /* maximum round trip time */ 245double tsum = 0.0; /* sum of all times, for doing average */ 246double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 247 248/* for node addresses */ 249u_short naflags; 250 251/* for ancillary data(advanced API) */ 252struct msghdr smsghdr; 253struct iovec smsgiov; 254char *scmsg = 0; 255 256volatile sig_atomic_t seenalrm; 257volatile sig_atomic_t seenint; 258#ifdef SIGINFO 259volatile sig_atomic_t seeninfo; 260#endif 261 262int main(int, char *[]); 263void fill(char *, char *); 264int get_hoplim(struct msghdr *); 265int get_pathmtu(struct msghdr *); 266struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); 267void onsignal(int); 268void retransmit(void); 269void onint(int); 270size_t pingerlen(void); 271int pinger(void); 272const char *pr_addr(struct sockaddr *, int); 273void pr_icmph(struct icmp6_hdr *, u_char *); 274void pr_iph(struct ip6_hdr *); 275void pr_suptypes(struct icmp6_nodeinfo *, size_t); 276void pr_nodeaddr(struct icmp6_nodeinfo *, int); 277int myechoreply(const struct icmp6_hdr *); 278int mynireply(const struct icmp6_nodeinfo *); 279char *dnsdecode(const u_char **, const u_char *, const u_char *, 280 char *, size_t); 281void pr_pack(u_char *, int, struct msghdr *); 282void pr_exthdrs(struct msghdr *); 283void pr_ip6opt(void *, size_t); 284void pr_rthdr(void *, size_t); 285int pr_bitrange(u_int32_t, int, int); 286void pr_retip(struct ip6_hdr *, u_char *); 287void summary(void); 288void tvsub(struct timeval *, struct timeval *); 289int setpolicy(int, char *); 290char *nigroup(char *, int); 291void usage(void); 292 293int 294main(int argc, char *argv[]) 295{ 296 struct itimerval itimer; 297 struct sockaddr_in6 from; 298#ifndef HAVE_ARC4RANDOM 299 struct timeval seed; 300#endif 301#ifdef HAVE_POLL_H 302 int timeout; 303#else 304 struct timeval timeout, *tv; 305#endif 306 struct addrinfo hints; 307 int cc, i; 308 int ch, hold, packlen, preload, optval, ret_ga; 309 int nig_oldmcprefix = -1; 310 u_char *datap; 311 char *e, *target, *ifname = NULL, *gateway = NULL; 312 int ip6optlen = 0; 313 struct cmsghdr *scmsgp = NULL; 314 /* For control (ancillary) data received from recvmsg() */ 315 struct cmsghdr cm[CONTROLLEN]; 316#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 317 u_long lsockbufsize; 318 int sockbufsize = 0; 319#endif 320 int usepktinfo = 0; 321 struct in6_pktinfo *pktinfo = NULL; 322#ifdef USE_RFC2292BIS 323 struct ip6_rthdr *rthdr = NULL; 324#endif 325#ifdef IPSEC_POLICY_IPSEC 326 char *policy_in = NULL; 327 char *policy_out = NULL; 328#endif 329 double intval; 330 size_t rthlen; 331#ifdef IPV6_USE_MIN_MTU 332 int mflag = 0; 333#endif 334 335 /* just to be sure */ 336 memset(&smsghdr, 0, sizeof(smsghdr)); 337 memset(&smsgiov, 0, sizeof(smsgiov)); 338 339 preload = 0; 340 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 341#ifndef IPSEC 342#define ADDOPTS 343#else 344#ifdef IPSEC_POLICY_IPSEC 345#define ADDOPTS "P:" 346#else 347#define ADDOPTS "AE" 348#endif /*IPSEC_POLICY_IPSEC*/ 349#endif 350 while ((ch = getopt(argc, argv, 351 "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwW" ADDOPTS)) != -1) { 352#undef ADDOPTS 353 switch (ch) { 354 case 'a': 355 { 356 char *cp; 357 358 options &= ~F_NOUSERDATA; 359 options |= F_NODEADDR; 360 for (cp = optarg; *cp != '\0'; cp++) { 361 switch (*cp) { 362 case 'a': 363 naflags |= NI_NODEADDR_FLAG_ALL; 364 break; 365 case 'c': 366 case 'C': 367 naflags |= NI_NODEADDR_FLAG_COMPAT; 368 break; 369 case 'l': 370 case 'L': 371 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 372 break; 373 case 's': 374 case 'S': 375 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 376 break; 377 case 'g': 378 case 'G': 379 naflags |= NI_NODEADDR_FLAG_GLOBAL; 380 break; 381 case 'A': /* experimental. not in the spec */ 382#ifdef NI_NODEADDR_FLAG_ANYCAST 383 naflags |= NI_NODEADDR_FLAG_ANYCAST; 384 break; 385#else 386 errx(1, 387"-a A is not supported on the platform"); 388 /*NOTREACHED*/ 389#endif 390 default: 391 usage(); 392 /*NOTREACHED*/ 393 } 394 } 395 break; 396 } 397 case 'b': 398#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 399 errno = 0; 400 e = NULL; 401 lsockbufsize = strtoul(optarg, &e, 10); 402 sockbufsize = lsockbufsize; 403 if (errno || !*optarg || *e || 404 sockbufsize != lsockbufsize) 405 errx(1, "invalid socket buffer size"); 406#else 407 errx(1, 408"-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 409#endif 410 break; 411 case 'c': 412 npackets = strtol(optarg, &e, 10); 413 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 414 errx(1, 415 "illegal number of packets -- %s", optarg); 416 break; 417 case 'D': 418 options |= F_DONTFRAG; 419 break; 420 case 'd': 421 options |= F_SO_DEBUG; 422 break; 423 case 'f': 424 if (getuid()) { 425 errno = EPERM; 426 errx(1, "Must be superuser to flood ping"); 427 } 428 options |= F_FLOOD; 429 setbuf(stdout, (char *)NULL); 430 break; 431 case 'g': 432 gateway = optarg; 433 break; 434 case 'H': 435 options |= F_HOSTNAME; 436 break; 437 case 'h': /* hoplimit */ 438 hoplimit = strtol(optarg, &e, 10); 439 if (*optarg == '\0' || *e != '\0') 440 errx(1, "illegal hoplimit %s", optarg); 441 if (255 < hoplimit || hoplimit < -1) 442 errx(1, 443 "illegal hoplimit -- %s", optarg); 444 break; 445 case 'I': 446 ifname = optarg; 447 options |= F_INTERFACE; 448#ifndef USE_SIN6_SCOPE_ID 449 usepktinfo++; 450#endif 451 break; 452 case 'i': /* wait between sending packets */ 453 intval = strtod(optarg, &e); 454 if (*optarg == '\0' || *e != '\0') 455 errx(1, "illegal timing interval %s", optarg); 456 if (intval < 1 && getuid()) { 457 errx(1, "%s: only root may use interval < 1s", 458 strerror(EPERM)); 459 } 460 interval.tv_sec = (long)intval; 461 interval.tv_usec = 462 (long)((intval - interval.tv_sec) * 1000000); 463 if (interval.tv_sec < 0) 464 errx(1, "illegal timing interval %s", optarg); 465 /* less than 1/hz does not make sense */ 466 if (interval.tv_sec == 0 && interval.tv_usec < 1) { 467 warnx("too small interval, raised to .000001"); 468 interval.tv_usec = 1; 469 } 470 options |= F_INTERVAL; 471 break; 472 case 'l': 473 if (getuid()) { 474 errno = EPERM; 475 errx(1, "Must be superuser to preload"); 476 } 477 preload = strtol(optarg, &e, 10); 478 if (preload < 0 || *optarg == '\0' || *e != '\0') 479 errx(1, "illegal preload value -- %s", optarg); 480 break; 481 case 'm': 482#ifdef IPV6_USE_MIN_MTU 483 mflag++; 484 break; 485#else 486 errx(1, "-%c is not supported on this platform", ch); 487 /*NOTREACHED*/ 488#endif 489 case 'n': 490 options &= ~F_HOSTNAME; 491 break; 492 case 'N': 493 options |= F_NIGROUP; 494 nig_oldmcprefix++; 495 break; 496 case 'o': 497 options |= F_ONCE; 498 break; 499 case 'p': /* fill buffer with user pattern */ 500 options |= F_PINGFILLED; 501 fill((char *)datap, optarg); 502 break; 503 case 'q': 504 options |= F_QUIET; 505 break; 506 case 'r': 507 options |= F_AUDIBLE; 508 break; 509 case 'R': 510 options |= F_MISSED; 511 break; 512 case 'S': 513 memset(&hints, 0, sizeof(struct addrinfo)); 514 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ 515 hints.ai_family = AF_INET6; 516 hints.ai_socktype = SOCK_RAW; 517 hints.ai_protocol = IPPROTO_ICMPV6; 518 519 ret_ga = getaddrinfo(optarg, NULL, &hints, &res); 520 if (ret_ga) { 521 errx(1, "invalid source address: %s", 522 gai_strerror(ret_ga)); 523 } 524 /* 525 * res->ai_family must be AF_INET6 and res->ai_addrlen 526 * must be sizeof(src). 527 */ 528 memcpy(&src, res->ai_addr, res->ai_addrlen); 529 srclen = res->ai_addrlen; 530 freeaddrinfo(res); 531 res = NULL; 532 options |= F_SRCADDR; 533 break; 534 case 's': /* size of packet to send */ 535 datalen = strtol(optarg, &e, 10); 536 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 537 errx(1, "illegal datalen value -- %s", optarg); 538 if (datalen > MAXDATALEN) { 539 errx(1, 540 "datalen value too large, maximum is %d", 541 MAXDATALEN); 542 } 543 break; 544 case 't': 545 options &= ~F_NOUSERDATA; 546 options |= F_SUPTYPES; 547 break; 548 case 'v': 549 options |= F_VERBOSE; 550 break; 551 case 'w': 552 options &= ~F_NOUSERDATA; 553 options |= F_FQDN; 554 break; 555 case 'W': 556 options &= ~F_NOUSERDATA; 557 options |= F_FQDNOLD; 558 break; 559#ifdef IPSEC 560#ifdef IPSEC_POLICY_IPSEC 561 case 'P': 562 options |= F_POLICY; 563 if (!strncmp("in", optarg, 2)) { 564 if ((policy_in = strdup(optarg)) == NULL) 565 errx(1, "strdup"); 566 } else if (!strncmp("out", optarg, 3)) { 567 if ((policy_out = strdup(optarg)) == NULL) 568 errx(1, "strdup"); 569 } else 570 errx(1, "invalid security policy"); 571 break; 572#else 573 case 'A': 574 options |= F_AUTHHDR; 575 break; 576 case 'E': 577 options |= F_ENCRYPT; 578 break; 579#endif /*IPSEC_POLICY_IPSEC*/ 580#endif /*IPSEC*/ 581 default: 582 usage(); 583 /*NOTREACHED*/ 584 } 585 } 586 587 argc -= optind; 588 argv += optind; 589 590 if (argc < 1) { 591 usage(); 592 /*NOTREACHED*/ 593 } 594 595 if (argc > 1) { 596#ifdef IPV6_RECVRTHDR /* 2292bis */ 597 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 598 argc - 1)); 599#else /* RFC2292 */ 600 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 601#endif 602 if (rthlen == 0) { 603 errx(1, "too many intermediate hops"); 604 /*NOTREACHED*/ 605 } 606 ip6optlen += rthlen; 607 } 608 609 if (options & F_NIGROUP) { 610 target = nigroup(argv[argc - 1], nig_oldmcprefix); 611 if (target == NULL) { 612 usage(); 613 /*NOTREACHED*/ 614 } 615 } else 616 target = argv[argc - 1]; 617 618 /* getaddrinfo */ 619 memset(&hints, 0, sizeof(struct addrinfo)); 620 hints.ai_flags = AI_CANONNAME; 621 hints.ai_family = AF_INET6; 622 hints.ai_socktype = SOCK_RAW; 623 hints.ai_protocol = IPPROTO_ICMPV6; 624 625 ret_ga = getaddrinfo(target, NULL, &hints, &res); 626 if (ret_ga) 627 errx(1, "%s", gai_strerror(ret_ga)); 628 if (res->ai_canonname) 629 hostname = res->ai_canonname; 630 else 631 hostname = target; 632 633 if (!res->ai_addr) 634 errx(1, "getaddrinfo failed"); 635 636 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 637 638 if ((s = socket(res->ai_family, res->ai_socktype, 639 res->ai_protocol)) < 0) 640 err(1, "socket"); 641 642 /* set the source address if specified. */ 643 if ((options & F_SRCADDR) && 644 bind(s, (struct sockaddr *)&src, srclen) != 0) { 645 err(1, "bind"); 646 } 647 648 /* set the gateway (next hop) if specified */ 649 if (gateway) { 650 struct addrinfo ghints, *gres; 651 int error; 652 653 memset(&ghints, 0, sizeof(ghints)); 654 ghints.ai_family = AF_INET6; 655 ghints.ai_socktype = SOCK_RAW; 656 ghints.ai_protocol = IPPROTO_ICMPV6; 657 658 error = getaddrinfo(gateway, NULL, &hints, &gres); 659 if (error) { 660 errx(1, "getaddrinfo for the gateway %s: %s", 661 gateway, gai_strerror(error)); 662 } 663 if (gres->ai_next && (options & F_VERBOSE)) 664 warnx("gateway resolves to multiple addresses"); 665 666 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP, 667 gres->ai_addr, gres->ai_addrlen)) { 668 err(1, "setsockopt(IPV6_NEXTHOP)"); 669 } 670 671 freeaddrinfo(gres); 672 } 673 674 /* 675 * let the kerel pass extension headers of incoming packets, 676 * for privileged socket options 677 */ 678 if ((options & F_VERBOSE) != 0) { 679 int opton = 1; 680 681#ifdef IPV6_RECVHOPOPTS 682 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 683 sizeof(opton))) 684 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 685#else /* old adv. API */ 686 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 687 sizeof(opton))) 688 err(1, "setsockopt(IPV6_HOPOPTS)"); 689#endif 690#ifdef IPV6_RECVDSTOPTS 691 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 692 sizeof(opton))) 693 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 694#else /* old adv. API */ 695 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 696 sizeof(opton))) 697 err(1, "setsockopt(IPV6_DSTOPTS)"); 698#endif 699#ifdef IPV6_RECVRTHDRDSTOPTS 700 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 701 sizeof(opton))) 702 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 703#endif 704 } 705 706 /* revoke root privilege */ 707 if (seteuid(getuid()) != 0) 708 err(1, "seteuid() failed"); 709 if (setuid(getuid()) != 0) 710 err(1, "setuid() failed"); 711 712 if ((options & F_FLOOD) && (options & F_INTERVAL)) 713 errx(1, "-f and -i incompatible options"); 714 715 if ((options & F_NOUSERDATA) == 0) { 716 if (datalen >= sizeof(struct tv32)) { 717 /* we can time transfer */ 718 timing = 1; 719 } else 720 timing = 0; 721 /* in F_VERBOSE case, we may get non-echoreply packets*/ 722 if (options & F_VERBOSE) 723 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 724 else 725 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 726 } else { 727 /* suppress timing for node information query */ 728 timing = 0; 729 datalen = 2048; 730 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 731 } 732 733 if (!(packet = (u_char *)malloc((u_int)packlen))) 734 err(1, "Unable to allocate packet"); 735 if (!(options & F_PINGFILLED)) 736 for (i = ICMP6ECHOLEN; i < packlen; ++i) 737 *datap++ = i; 738 739 ident = getpid() & 0xFFFF; 740#ifndef HAVE_ARC4RANDOM 741 gettimeofday(&seed, NULL); 742 srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident)); 743 memset(nonce, 0, sizeof(nonce)); 744 for (i = 0; i < sizeof(nonce); i += sizeof(int)) 745 *((int *)&nonce[i]) = rand(); 746#else 747 memset(nonce, 0, sizeof(nonce)); 748 for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t)) 749 *((u_int32_t *)&nonce[i]) = arc4random(); 750#endif 751 optval = 1; 752 if (options & F_DONTFRAG) 753 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG, 754 &optval, sizeof(optval)) == -1) 755 err(1, "IPV6_DONTFRAG"); 756 hold = 1; 757 758 if (options & F_SO_DEBUG) 759 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 760 sizeof(hold)); 761 optval = IPV6_DEFHLIM; 762 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 763 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 764 &optval, sizeof(optval)) == -1) 765 err(1, "IPV6_MULTICAST_HOPS"); 766#ifdef IPV6_USE_MIN_MTU 767 if (mflag != 1) { 768 optval = mflag > 1 ? 0 : 1; 769 770 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 771 &optval, sizeof(optval)) == -1) 772 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 773 } 774#ifdef IPV6_RECVPATHMTU 775 else { 776 optval = 1; 777 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, 778 &optval, sizeof(optval)) == -1) 779 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 780 } 781#endif /* IPV6_RECVPATHMTU */ 782#endif /* IPV6_USE_MIN_MTU */ 783 784#ifdef IPSEC 785#ifdef IPSEC_POLICY_IPSEC 786 if (options & F_POLICY) { 787 if (setpolicy(s, policy_in) < 0) 788 errx(1, "%s", ipsec_strerror()); 789 if (setpolicy(s, policy_out) < 0) 790 errx(1, "%s", ipsec_strerror()); 791 } 792#else 793 if (options & F_AUTHHDR) { 794 optval = IPSEC_LEVEL_REQUIRE; 795#ifdef IPV6_AUTH_TRANS_LEVEL 796 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 797 &optval, sizeof(optval)) == -1) 798 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 799#else /* old def */ 800 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 801 &optval, sizeof(optval)) == -1) 802 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 803#endif 804 } 805 if (options & F_ENCRYPT) { 806 optval = IPSEC_LEVEL_REQUIRE; 807 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 808 &optval, sizeof(optval)) == -1) 809 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 810 } 811#endif /*IPSEC_POLICY_IPSEC*/ 812#endif 813 814#ifdef ICMP6_FILTER 815 { 816 struct icmp6_filter filt; 817 if (!(options & F_VERBOSE)) { 818 ICMP6_FILTER_SETBLOCKALL(&filt); 819 if ((options & F_FQDN) || (options & F_FQDNOLD) || 820 (options & F_NODEADDR) || (options & F_SUPTYPES)) 821 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 822 else 823 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 824 } else { 825 ICMP6_FILTER_SETPASSALL(&filt); 826 } 827 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 828 sizeof(filt)) < 0) 829 err(1, "setsockopt(ICMP6_FILTER)"); 830 } 831#endif /*ICMP6_FILTER*/ 832 833 /* let the kerel pass extension headers of incoming packets */ 834 if ((options & F_VERBOSE) != 0) { 835 int opton = 1; 836 837#ifdef IPV6_RECVRTHDR 838 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 839 sizeof(opton))) 840 err(1, "setsockopt(IPV6_RECVRTHDR)"); 841#else /* old adv. API */ 842 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton, 843 sizeof(opton))) 844 err(1, "setsockopt(IPV6_RTHDR)"); 845#endif 846 } 847 848/* 849 optval = 1; 850 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 851 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 852 &optval, sizeof(optval)) == -1) 853 err(1, "IPV6_MULTICAST_LOOP"); 854*/ 855 856 /* Specify the outgoing interface and/or the source address */ 857 if (usepktinfo) 858 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 859 860 if (hoplimit != -1) 861 ip6optlen += CMSG_SPACE(sizeof(int)); 862 863 /* set IP6 packet options */ 864 if (ip6optlen) { 865 if ((scmsg = (char *)malloc(ip6optlen)) == 0) 866 errx(1, "can't allocate enough memory"); 867 smsghdr.msg_control = (caddr_t)scmsg; 868 smsghdr.msg_controllen = ip6optlen; 869 scmsgp = (struct cmsghdr *)scmsg; 870 } 871 if (usepktinfo) { 872 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); 873 memset(pktinfo, 0, sizeof(*pktinfo)); 874 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 875 scmsgp->cmsg_level = IPPROTO_IPV6; 876 scmsgp->cmsg_type = IPV6_PKTINFO; 877 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 878 } 879 880 /* set the outgoing interface */ 881 if (ifname) { 882#ifndef USE_SIN6_SCOPE_ID 883 /* pktinfo must have already been allocated */ 884 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0) 885 errx(1, "%s: invalid interface name", ifname); 886#else 887 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 888 errx(1, "%s: invalid interface name", ifname); 889#endif 890 } 891 if (hoplimit != -1) { 892 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 893 scmsgp->cmsg_level = IPPROTO_IPV6; 894 scmsgp->cmsg_type = IPV6_HOPLIMIT; 895 *(int *)(CMSG_DATA(scmsgp)) = hoplimit; 896 897 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 898 } 899 900 if (argc > 1) { /* some intermediate addrs are specified */ 901 int hops, error; 902#ifdef USE_RFC2292BIS 903 int rthdrlen; 904#endif 905 906#ifdef USE_RFC2292BIS 907 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 908 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 909 scmsgp->cmsg_level = IPPROTO_IPV6; 910 scmsgp->cmsg_type = IPV6_RTHDR; 911 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 912 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 913 IPV6_RTHDR_TYPE_0, argc - 1); 914 if (rthdr == NULL) 915 errx(1, "can't initialize rthdr"); 916#else /* old advanced API */ 917 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp, 918 IPV6_RTHDR_TYPE_0)) == 0) 919 errx(1, "can't initialize rthdr"); 920#endif /* USE_RFC2292BIS */ 921 922 for (hops = 0; hops < argc - 1; hops++) { 923 struct addrinfo *iaip; 924 925 if ((error = getaddrinfo(argv[hops], NULL, &hints, 926 &iaip))) 927 errx(1, "%s", gai_strerror(error)); 928 if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6) 929 errx(1, 930 "bad addr family of an intermediate addr"); 931 932#ifdef USE_RFC2292BIS 933 if (inet6_rth_add(rthdr, 934 &(SIN6(iaip->ai_addr))->sin6_addr)) 935 errx(1, "can't add an intermediate node"); 936#else /* old advanced API */ 937 if (inet6_rthdr_add(scmsgp, 938 &(SIN6(iaip->ai_addr))->sin6_addr, 939 IPV6_RTHDR_LOOSE)) 940 errx(1, "can't add an intermediate node"); 941#endif /* USE_RFC2292BIS */ 942 freeaddrinfo(iaip); 943 } 944 945#ifndef USE_RFC2292BIS 946 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE)) 947 errx(1, "can't set the last flag"); 948#endif 949 950 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 951 } 952 953 if (!(options & F_SRCADDR)) { 954 /* 955 * get the source address. XXX since we revoked the root 956 * privilege, we cannot use a raw socket for this. 957 */ 958 int dummy; 959 socklen_t len = sizeof(src); 960 961 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 962 err(1, "UDP socket"); 963 964 src.sin6_family = AF_INET6; 965 src.sin6_addr = dst.sin6_addr; 966 src.sin6_port = ntohs(DUMMY_PORT); 967 src.sin6_scope_id = dst.sin6_scope_id; 968 969#ifdef USE_RFC2292BIS 970 if (pktinfo && 971 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 972 (void *)pktinfo, sizeof(*pktinfo))) 973 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 974 975 if (hoplimit != -1 && 976 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 977 (void *)&hoplimit, sizeof(hoplimit))) 978 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); 979 980 if (hoplimit != -1 && 981 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 982 (void *)&hoplimit, sizeof(hoplimit))) 983 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); 984 985 if (rthdr && 986 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 987 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 988 err(1, "UDP setsockopt(IPV6_RTHDR)"); 989#else /* old advanced API */ 990 if (smsghdr.msg_control && 991 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS, 992 (void *)smsghdr.msg_control, smsghdr.msg_controllen)) 993 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)"); 994#endif 995 996 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 997 err(1, "UDP connect"); 998 999 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 1000 err(1, "getsockname"); 1001 1002 close(dummy); 1003 } 1004 1005#if defined(SO_SNDBUF) && defined(SO_RCVBUF) 1006 if (sockbufsize) { 1007 if (datalen > sockbufsize) 1008 warnx("you need -b to increase socket buffer size"); 1009 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 1010 sizeof(sockbufsize)) < 0) 1011 err(1, "setsockopt(SO_SNDBUF)"); 1012 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 1013 sizeof(sockbufsize)) < 0) 1014 err(1, "setsockopt(SO_RCVBUF)"); 1015 } 1016 else { 1017 if (datalen > 8 * 1024) /*XXX*/ 1018 warnx("you need -b to increase socket buffer size"); 1019 /* 1020 * When pinging the broadcast address, you can get a lot of 1021 * answers. Doing something so evil is useful if you are trying 1022 * to stress the ethernet, or just want to fill the arp cache 1023 * to get some stuff for /etc/ethers. 1024 */ 1025 hold = 48 * 1024; 1026 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 1027 sizeof(hold)); 1028 } 1029#endif 1030 1031 optval = 1; 1032#ifndef USE_SIN6_SCOPE_ID 1033#ifdef IPV6_RECVPKTINFO 1034 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 1035 sizeof(optval)) < 0) 1036 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 1037#else /* old adv. API */ 1038 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 1039 sizeof(optval)) < 0) 1040 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 1041#endif 1042#endif /* USE_SIN6_SCOPE_ID */ 1043#ifdef IPV6_RECVHOPLIMIT 1044 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 1045 sizeof(optval)) < 0) 1046 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 1047#else /* old adv. API */ 1048 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 1049 sizeof(optval)) < 0) 1050 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 1051#endif 1052 1053 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 1054 (unsigned long)(pingerlen() - 8)); 1055 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 1056 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 1057 1058 while (preload--) /* Fire off them quickies. */ 1059 (void)pinger(); 1060 1061 (void)signal(SIGINT, onsignal); 1062#ifdef SIGINFO 1063 (void)signal(SIGINFO, onsignal); 1064#endif 1065 1066 if ((options & F_FLOOD) == 0) { 1067 (void)signal(SIGALRM, onsignal); 1068 itimer.it_interval = interval; 1069 itimer.it_value = interval; 1070 (void)setitimer(ITIMER_REAL, &itimer, NULL); 1071 if (ntransmitted == 0) 1072 retransmit(); 1073 } 1074 1075#ifndef HAVE_POLL_H 1076 fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask); 1077 if ((fdmaskp = malloc(fdmasks)) == NULL) 1078 err(1, "malloc"); 1079#endif 1080 1081 seenalrm = seenint = 0; 1082#ifdef SIGINFO 1083 seeninfo = 0; 1084#endif 1085 1086 for (;;) { 1087 struct msghdr m; 1088 struct iovec iov[2]; 1089 1090 /* signal handling */ 1091 if (seenalrm) { 1092 /* last packet sent, timeout reached? */ 1093 if (npackets && ntransmitted >= npackets) { 1094 struct timeval zerotime = {0, 0}; 1095 itimer.it_value = zerotime; 1096 itimer.it_interval = zerotime; 1097 (void)setitimer(ITIMER_REAL, &itimer, NULL); 1098 seenalrm = 0; /* clear flag */ 1099 continue; 1100 } 1101 retransmit(); 1102 seenalrm = 0; 1103 continue; 1104 } 1105 if (seenint) { 1106 onint(SIGINT); 1107 seenint = 0; 1108 continue; 1109 } 1110#ifdef SIGINFO 1111 if (seeninfo) { 1112 summary(); 1113 seeninfo = 0; 1114 continue; 1115 } 1116#endif 1117 1118 if (options & F_FLOOD) { 1119 (void)pinger(); 1120#ifdef HAVE_POLL_H 1121 timeout = 10; 1122#else 1123 timeout.tv_sec = 0; 1124 timeout.tv_usec = 10000; 1125 tv = &timeout; 1126#endif 1127 } else { 1128#ifdef HAVE_POLL_H 1129 timeout = INFTIM; 1130#else 1131 tv = NULL; 1132#endif 1133 } 1134#ifdef HAVE_POLL_H 1135 fdmaskp[0].fd = s; 1136 fdmaskp[0].events = POLLIN; 1137 cc = poll(fdmaskp, 1, timeout); 1138#else 1139 memset(fdmaskp, 0, fdmasks); 1140 FD_SET(s, fdmaskp); 1141 cc = select(s + 1, fdmaskp, NULL, NULL, tv); 1142#endif 1143 if (cc < 0) { 1144 if (errno != EINTR) { 1145#ifdef HAVE_POLL_H 1146 warn("poll"); 1147#else 1148 warn("select"); 1149#endif 1150 sleep(1); 1151 } 1152 continue; 1153 } else if (cc == 0) 1154 continue; 1155 1156 m.msg_name = (caddr_t)&from; 1157 m.msg_namelen = sizeof(from); 1158 memset(&iov, 0, sizeof(iov)); 1159 iov[0].iov_base = (caddr_t)packet; 1160 iov[0].iov_len = packlen; 1161 m.msg_iov = iov; 1162 m.msg_iovlen = 1; 1163 memset(cm, 0, CONTROLLEN); 1164 m.msg_control = (void *)cm; 1165 m.msg_controllen = CONTROLLEN; 1166 1167 cc = recvmsg(s, &m, 0); 1168 if (cc < 0) { 1169 if (errno != EINTR) { 1170 warn("recvmsg"); 1171 sleep(1); 1172 } 1173 continue; 1174 } else if (cc == 0) { 1175 int mtu; 1176 1177 /* 1178 * receive control messages only. Process the 1179 * exceptions (currently the only possibility is 1180 * a path MTU notification.) 1181 */ 1182 if ((mtu = get_pathmtu(&m)) > 0) { 1183 if ((options & F_VERBOSE) != 0) { 1184 printf("new path MTU (%d) is " 1185 "notified\n", mtu); 1186 } 1187 } 1188 continue; 1189 } else { 1190 /* 1191 * an ICMPv6 message (probably an echoreply) arrived. 1192 */ 1193 pr_pack(packet, cc, &m); 1194 } 1195 if (((options & F_ONCE) != 0 && nreceived > 0) || 1196 (npackets > 0 && nreceived >= npackets)) 1197 break; 1198 if (ntransmitted - nreceived - 1 > nmissedmax) { 1199 nmissedmax = ntransmitted - nreceived - 1; 1200 if (options & F_MISSED) 1201 (void)write(STDOUT_FILENO, &BBELL, 1); 1202 } 1203 } 1204 summary(); 1205 1206 if (res != NULL) 1207 freeaddrinfo(res); 1208 1209 if(packet != NULL) 1210 free(packet); 1211 1212#ifndef HAVE_POLL_H 1213 if(fdmaskp != NULL) 1214 free(fdmaskp); 1215#endif 1216 1217 exit(nreceived == 0 ? 2 : 0); 1218} 1219 1220void 1221onsignal(int sig) 1222{ 1223 1224 switch (sig) { 1225 case SIGALRM: 1226 seenalrm++; 1227 break; 1228 case SIGINT: 1229 seenint++; 1230 break; 1231#ifdef SIGINFO 1232 case SIGINFO: 1233 seeninfo++; 1234 break; 1235#endif 1236 } 1237} 1238 1239/* 1240 * retransmit -- 1241 * This routine transmits another ping6. 1242 */ 1243void 1244retransmit(void) 1245{ 1246 struct itimerval itimer; 1247 1248 if (pinger() == 0) 1249 return; 1250 1251 /* 1252 * If we're not transmitting any more packets, change the timer 1253 * to wait two round-trip times if we've received any packets or 1254 * ten seconds if we haven't. 1255 */ 1256#define MAXWAIT 10 1257 if (nreceived) { 1258 itimer.it_value.tv_sec = 2 * tmax / 1000; 1259 if (itimer.it_value.tv_sec == 0) 1260 itimer.it_value.tv_sec = 1; 1261 } else 1262 itimer.it_value.tv_sec = MAXWAIT; 1263 itimer.it_interval.tv_sec = 0; 1264 itimer.it_interval.tv_usec = 0; 1265 itimer.it_value.tv_usec = 0; 1266 1267 (void)signal(SIGALRM, onsignal); 1268 (void)setitimer(ITIMER_REAL, &itimer, NULL); 1269} 1270 1271/* 1272 * pinger -- 1273 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1274 * will be added on by the kernel. The ID field is our UNIX process ID, 1275 * and the sequence number is an ascending integer. The first 8 bytes 1276 * of the data portion are used to hold a UNIX "timeval" struct in VAX 1277 * byte-order, to compute the round-trip time. 1278 */ 1279size_t 1280pingerlen(void) 1281{ 1282 size_t l; 1283 1284 if (options & F_FQDN) 1285 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1286 else if (options & F_FQDNOLD) 1287 l = ICMP6_NIQLEN; 1288 else if (options & F_NODEADDR) 1289 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1290 else if (options & F_SUPTYPES) 1291 l = ICMP6_NIQLEN; 1292 else 1293 l = ICMP6ECHOLEN + datalen; 1294 1295 return l; 1296} 1297 1298int 1299pinger(void) 1300{ 1301 struct icmp6_hdr *icp; 1302 struct iovec iov[2]; 1303 int i, cc; 1304 struct icmp6_nodeinfo *nip; 1305 int seq; 1306 1307 if (npackets && ntransmitted >= npackets) 1308 return(-1); /* no more transmission */ 1309 1310 icp = (struct icmp6_hdr *)outpack; 1311 nip = (struct icmp6_nodeinfo *)outpack; 1312 memset(icp, 0, sizeof(*icp)); 1313 icp->icmp6_cksum = 0; 1314 seq = ntransmitted++; 1315 CLR(seq % mx_dup_ck); 1316 1317 if (options & F_FQDN) { 1318 icp->icmp6_type = ICMP6_NI_QUERY; 1319 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1320 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1321 nip->ni_flags = htons(0); 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 1327 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1328 sizeof(dst.sin6_addr)); 1329 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1330 datalen = 0; 1331 } else if (options & F_FQDNOLD) { 1332 /* packet format in 03 draft - no Subject data on queries */ 1333 icp->icmp6_type = ICMP6_NI_QUERY; 1334 icp->icmp6_code = 0; /* code field is always 0 */ 1335 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1336 nip->ni_flags = htons(0); 1337 1338 memcpy(nip->icmp6_ni_nonce, nonce, 1339 sizeof(nip->icmp6_ni_nonce)); 1340 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1341 1342 cc = ICMP6_NIQLEN; 1343 datalen = 0; 1344 } else if (options & F_NODEADDR) { 1345 icp->icmp6_type = ICMP6_NI_QUERY; 1346 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1347 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1348 nip->ni_flags = naflags; 1349 1350 memcpy(nip->icmp6_ni_nonce, nonce, 1351 sizeof(nip->icmp6_ni_nonce)); 1352 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1353 1354 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1355 sizeof(dst.sin6_addr)); 1356 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1357 datalen = 0; 1358 } else if (options & F_SUPTYPES) { 1359 icp->icmp6_type = ICMP6_NI_QUERY; 1360 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1361 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1362 /* we support compressed bitmap */ 1363 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1364 1365 memcpy(nip->icmp6_ni_nonce, nonce, 1366 sizeof(nip->icmp6_ni_nonce)); 1367 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq); 1368 cc = ICMP6_NIQLEN; 1369 datalen = 0; 1370 } else { 1371 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1372 icp->icmp6_code = 0; 1373 icp->icmp6_id = htons(ident); 1374 icp->icmp6_seq = ntohs(seq); 1375 if (timing) { 1376 struct timeval tv; 1377 struct tv32 *tv32; 1378 (void)gettimeofday(&tv, NULL); 1379 tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN]; 1380 tv32->tv32_sec = htonl(tv.tv_sec); 1381 tv32->tv32_usec = htonl(tv.tv_usec); 1382 } 1383 cc = ICMP6ECHOLEN + datalen; 1384 } 1385 1386#ifdef DIAGNOSTIC 1387 if (pingerlen() != cc) 1388 errx(1, "internal error; length mismatch"); 1389#endif 1390 1391 smsghdr.msg_name = (caddr_t)&dst; 1392 smsghdr.msg_namelen = sizeof(dst); 1393 memset(&iov, 0, sizeof(iov)); 1394 iov[0].iov_base = (caddr_t)outpack; 1395 iov[0].iov_len = cc; 1396 smsghdr.msg_iov = iov; 1397 smsghdr.msg_iovlen = 1; 1398 1399 i = sendmsg(s, &smsghdr, 0); 1400 1401 if (i < 0 || i != cc) { 1402 if (i < 0) 1403 warn("sendmsg"); 1404 (void)printf("ping6: wrote %s %d chars, ret=%d\n", 1405 hostname, cc, i); 1406 } 1407 if (!(options & F_QUIET) && options & F_FLOOD) 1408 (void)write(STDOUT_FILENO, &DOT, 1); 1409 1410 return(0); 1411} 1412 1413int 1414myechoreply(const struct icmp6_hdr *icp) 1415{ 1416 if (ntohs(icp->icmp6_id) == ident) 1417 return 1; 1418 else 1419 return 0; 1420} 1421 1422int 1423mynireply(const struct icmp6_nodeinfo *nip) 1424{ 1425 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1426 nonce + sizeof(u_int16_t), 1427 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1428 return 1; 1429 else 1430 return 0; 1431} 1432 1433char * 1434dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf, 1435 size_t bufsiz) 1436 /*base for compressed name*/ 1437{ 1438 int i; 1439 const u_char *cp; 1440 char cresult[MAXDNAME + 1]; 1441 const u_char *comp; 1442 int l; 1443 1444 cp = *sp; 1445 *buf = '\0'; 1446 1447 if (cp >= ep) 1448 return NULL; 1449 while (cp < ep) { 1450 i = *cp; 1451 if (i == 0 || cp != *sp) { 1452 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz) 1453 return NULL; /*result overrun*/ 1454 } 1455 if (i == 0) 1456 break; 1457 cp++; 1458 1459 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1460 /* DNS compression */ 1461 if (!base) 1462 return NULL; 1463 1464 comp = base + (i & 0x3f); 1465 if (dnsdecode(&comp, cp, base, cresult, 1466 sizeof(cresult)) == NULL) 1467 return NULL; 1468 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1469 return NULL; /*result overrun*/ 1470 break; 1471 } else if ((i & 0x3f) == i) { 1472 if (i > ep - cp) 1473 return NULL; /*source overrun*/ 1474 while (i-- > 0 && cp < ep) { 1475 l = snprintf(cresult, sizeof(cresult), 1476 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1477 if (l >= sizeof(cresult) || l < 0) 1478 return NULL; 1479 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1480 return NULL; /*result overrun*/ 1481 cp++; 1482 } 1483 } else 1484 return NULL; /*invalid label*/ 1485 } 1486 if (i != 0) 1487 return NULL; /*not terminated*/ 1488 cp++; 1489 *sp = cp; 1490 return buf; 1491} 1492 1493/* 1494 * pr_pack -- 1495 * Print out the packet, if it came from us. This logic is necessary 1496 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1497 * which arrive ('tis only fair). This permits multiple copies of this 1498 * program to be run without having intermingled output (or statistics!). 1499 */ 1500void 1501pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1502{ 1503#define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1504 struct icmp6_hdr *icp; 1505 struct icmp6_nodeinfo *ni; 1506 int i; 1507 int hoplim; 1508 struct sockaddr *from; 1509 int fromlen; 1510 u_char *cp = NULL, *dp, *end = buf + cc; 1511 struct in6_pktinfo *pktinfo = NULL; 1512 struct timeval tv, tp; 1513 struct tv32 *tpp; 1514 double triptime = 0; 1515 int dupflag; 1516 size_t off; 1517 int oldfqdn; 1518 u_int16_t seq; 1519 char dnsname[MAXDNAME + 1]; 1520 1521 (void)gettimeofday(&tv, NULL); 1522 1523 if (!mhdr || !mhdr->msg_name || 1524 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1525 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1526 if (options & F_VERBOSE) 1527 warnx("invalid peername"); 1528 return; 1529 } 1530 from = (struct sockaddr *)mhdr->msg_name; 1531 fromlen = mhdr->msg_namelen; 1532 if (cc < sizeof(struct icmp6_hdr)) { 1533 if (options & F_VERBOSE) 1534 warnx("packet too short (%d bytes) from %s", cc, 1535 pr_addr(from, fromlen)); 1536 return; 1537 } 1538 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) && 1539 (options & F_VERBOSE) != 0) 1540 warnx("some control data discarded, insufficient buffer size"); 1541 icp = (struct icmp6_hdr *)buf; 1542 ni = (struct icmp6_nodeinfo *)buf; 1543 off = 0; 1544 1545 if ((hoplim = get_hoplim(mhdr)) == -1) { 1546 warnx("failed to get receiving hop limit"); 1547 return; 1548 } 1549 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1550 warnx("failed to get receiving packet information"); 1551 return; 1552 } 1553 1554 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1555 seq = ntohs(icp->icmp6_seq); 1556 ++nreceived; 1557 if (timing) { 1558 tpp = (struct tv32 *)(icp + 1); 1559 tp.tv_sec = ntohl(tpp->tv32_sec); 1560 tp.tv_usec = ntohl(tpp->tv32_usec); 1561 tvsub(&tv, &tp); 1562 triptime = ((double)tv.tv_sec) * 1000.0 + 1563 ((double)tv.tv_usec) / 1000.0; 1564 tsum += triptime; 1565 tsumsq += triptime * triptime; 1566 if (triptime < tmin) 1567 tmin = triptime; 1568 if (triptime > tmax) 1569 tmax = triptime; 1570 } 1571 1572 if (TST(seq % mx_dup_ck)) { 1573 ++nrepeats; 1574 --nreceived; 1575 dupflag = 1; 1576 } else { 1577 SET(seq % mx_dup_ck); 1578 dupflag = 0; 1579 } 1580 1581 if (options & F_QUIET) 1582 return; 1583 1584 if (options & F_FLOOD) 1585 (void)write(STDOUT_FILENO, &BSPACE, 1); 1586 else { 1587 if (options & F_AUDIBLE) 1588 (void)write(STDOUT_FILENO, &BBELL, 1); 1589 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1590 pr_addr(from, fromlen), seq); 1591 (void)printf(" hlim=%d", hoplim); 1592 if ((options & F_VERBOSE) != 0) { 1593 struct sockaddr_in6 dstsa; 1594 1595 memset(&dstsa, 0, sizeof(dstsa)); 1596 dstsa.sin6_family = AF_INET6; 1597 dstsa.sin6_len = sizeof(dstsa); 1598 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1599 dstsa.sin6_addr = pktinfo->ipi6_addr; 1600 (void)printf(" dst=%s", 1601 pr_addr((struct sockaddr *)&dstsa, 1602 sizeof(dstsa))); 1603 } 1604 if (timing) 1605 (void)printf(" time=%.3f ms", triptime); 1606 if (dupflag) 1607 (void)printf("(DUP!)"); 1608 /* check the data */ 1609 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1610 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1611 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1612 if (*cp != *dp) { 1613 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1614 break; 1615 } 1616 } 1617 } 1618 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1619 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce); 1620 ++nreceived; 1621 if (TST(seq % mx_dup_ck)) { 1622 ++nrepeats; 1623 --nreceived; 1624 dupflag = 1; 1625 } else { 1626 SET(seq % mx_dup_ck); 1627 dupflag = 0; 1628 } 1629 1630 if (options & F_QUIET) 1631 return; 1632 1633 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1634 1635 switch (ntohs(ni->ni_code)) { 1636 case ICMP6_NI_SUCCESS: 1637 break; 1638 case ICMP6_NI_REFUSED: 1639 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1640 goto fqdnend; 1641 case ICMP6_NI_UNKNOWN: 1642 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1643 goto fqdnend; 1644 default: 1645 printf("unknown code 0x%x, type 0x%x", 1646 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1647 goto fqdnend; 1648 } 1649 1650 switch (ntohs(ni->ni_qtype)) { 1651 case NI_QTYPE_NOOP: 1652 printf("NodeInfo NOOP"); 1653 break; 1654 case NI_QTYPE_SUPTYPES: 1655 pr_suptypes(ni, end - (u_char *)ni); 1656 break; 1657 case NI_QTYPE_NODEADDR: 1658 pr_nodeaddr(ni, end - (u_char *)ni); 1659 break; 1660 case NI_QTYPE_FQDN: 1661 default: /* XXX: for backward compatibility */ 1662 cp = (u_char *)ni + ICMP6_NIRLEN; 1663 if (buf[off + ICMP6_NIRLEN] == 1664 cc - off - ICMP6_NIRLEN - 1) 1665 oldfqdn = 1; 1666 else 1667 oldfqdn = 0; 1668 if (oldfqdn) { 1669 cp++; /* skip length */ 1670 while (cp < end) { 1671 safeputc(*cp & 0xff); 1672 cp++; 1673 } 1674 } else { 1675 i = 0; 1676 while (cp < end) { 1677 if (dnsdecode((const u_char **)&cp, end, 1678 (const u_char *)(ni + 1), dnsname, 1679 sizeof(dnsname)) == NULL) { 1680 printf("???"); 1681 break; 1682 } 1683 /* 1684 * name-lookup special handling for 1685 * truncated name 1686 */ 1687 if (cp + 1 <= end && !*cp && 1688 strlen(dnsname) > 0) { 1689 dnsname[strlen(dnsname) - 1] = '\0'; 1690 cp++; 1691 } 1692 printf("%s%s", i > 0 ? "," : "", 1693 dnsname); 1694 } 1695 } 1696 if (options & F_VERBOSE) { 1697 int32_t ttl; 1698 int comma = 0; 1699 1700 (void)printf(" ("); /*)*/ 1701 1702 switch (ni->ni_code) { 1703 case ICMP6_NI_REFUSED: 1704 (void)printf("refused"); 1705 comma++; 1706 break; 1707 case ICMP6_NI_UNKNOWN: 1708 (void)printf("unknown qtype"); 1709 comma++; 1710 break; 1711 } 1712 1713 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1714 /* case of refusion, unknown */ 1715 /*(*/ 1716 putchar(')'); 1717 goto fqdnend; 1718 } 1719 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]); 1720 if (comma) 1721 printf(","); 1722 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1723 (void)printf("TTL=%d:meaningless", 1724 (int)ttl); 1725 } else { 1726 if (ttl < 0) { 1727 (void)printf("TTL=%d:invalid", 1728 ttl); 1729 } else 1730 (void)printf("TTL=%d", ttl); 1731 } 1732 comma++; 1733 1734 if (oldfqdn) { 1735 if (comma) 1736 printf(","); 1737 printf("03 draft"); 1738 comma++; 1739 } else { 1740 cp = (u_char *)ni + ICMP6_NIRLEN; 1741 if (cp == end) { 1742 if (comma) 1743 printf(","); 1744 printf("no name"); 1745 comma++; 1746 } 1747 } 1748 1749 if (buf[off + ICMP6_NIRLEN] != 1750 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1751 if (comma) 1752 printf(","); 1753 (void)printf("invalid namelen:%d/%lu", 1754 buf[off + ICMP6_NIRLEN], 1755 (u_long)cc - off - ICMP6_NIRLEN - 1); 1756 comma++; 1757 } 1758 /*(*/ 1759 putchar(')'); 1760 } 1761 fqdnend: 1762 ; 1763 } 1764 } else { 1765 /* We've got something other than an ECHOREPLY */ 1766 if (!(options & F_VERBOSE)) 1767 return; 1768 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1769 pr_icmph(icp, end); 1770 } 1771 1772 if (!(options & F_FLOOD)) { 1773 (void)putchar('\n'); 1774 if (options & F_VERBOSE) 1775 pr_exthdrs(mhdr); 1776 (void)fflush(stdout); 1777 } 1778#undef safeputc 1779} 1780 1781void 1782pr_exthdrs(struct msghdr *mhdr) 1783{ 1784 ssize_t bufsize; 1785 void *bufp; 1786 struct cmsghdr *cm; 1787 1788 bufsize = 0; 1789 bufp = mhdr->msg_control; 1790 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1791 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1792 if (cm->cmsg_level != IPPROTO_IPV6) 1793 continue; 1794 1795 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp); 1796 if (bufsize <= 0) 1797 continue; 1798 switch (cm->cmsg_type) { 1799 case IPV6_HOPOPTS: 1800 printf(" HbH Options: "); 1801 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1802 break; 1803 case IPV6_DSTOPTS: 1804#ifdef IPV6_RTHDRDSTOPTS 1805 case IPV6_RTHDRDSTOPTS: 1806#endif 1807 printf(" Dst Options: "); 1808 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1809 break; 1810 case IPV6_RTHDR: 1811 printf(" Routing: "); 1812 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize); 1813 break; 1814 } 1815 } 1816} 1817 1818#ifdef USE_RFC2292BIS 1819void 1820pr_ip6opt(void *extbuf, size_t bufsize) 1821{ 1822 struct ip6_hbh *ext; 1823 int currentlen; 1824 u_int8_t type; 1825 socklen_t extlen, len; 1826 void *databuf; 1827 size_t offset; 1828 u_int16_t value2; 1829 u_int32_t value4; 1830 1831 ext = (struct ip6_hbh *)extbuf; 1832 extlen = (ext->ip6h_len + 1) * 8; 1833 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1834 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1835 1836 /* 1837 * Bounds checking on the ancillary data buffer: 1838 * subtract the size of a cmsg structure from the buffer size. 1839 */ 1840 if (bufsize < (extlen + CMSG_SPACE(0))) { 1841 extlen = bufsize - CMSG_SPACE(0); 1842 warnx("options truncated, showing only %u (total=%u)", 1843 (unsigned int)(extlen / 8 - 1), 1844 (unsigned int)(ext->ip6h_len)); 1845 } 1846 1847 currentlen = 0; 1848 while (1) { 1849 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1850 &type, &len, &databuf); 1851 if (currentlen == -1) 1852 break; 1853 switch (type) { 1854 /* 1855 * Note that inet6_opt_next automatically skips any padding 1856 * optins. 1857 */ 1858 case IP6OPT_JUMBO: 1859 offset = 0; 1860 offset = inet6_opt_get_val(databuf, offset, 1861 &value4, sizeof(value4)); 1862 printf(" Jumbo Payload Opt: Length %u\n", 1863 (u_int32_t)ntohl(value4)); 1864 break; 1865 case IP6OPT_ROUTER_ALERT: 1866 offset = 0; 1867 offset = inet6_opt_get_val(databuf, offset, 1868 &value2, sizeof(value2)); 1869 printf(" Router Alert Opt: Type %u\n", 1870 ntohs(value2)); 1871 break; 1872 default: 1873 printf(" Received Opt %u len %lu\n", 1874 type, (unsigned long)len); 1875 break; 1876 } 1877 } 1878 return; 1879} 1880#else /* !USE_RFC2292BIS */ 1881/* ARGSUSED */ 1882void 1883pr_ip6opt(void *extbuf, size_t bufsize __unused) 1884{ 1885 putchar('\n'); 1886 return; 1887} 1888#endif /* USE_RFC2292BIS */ 1889 1890#ifdef USE_RFC2292BIS 1891void 1892pr_rthdr(void *extbuf, size_t bufsize) 1893{ 1894 struct in6_addr *in6; 1895 char ntopbuf[INET6_ADDRSTRLEN]; 1896 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1897 int i, segments, origsegs, rthsize, size0, size1; 1898 1899 /* print fixed part of the header */ 1900 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1901 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1902 if ((segments = inet6_rth_segments(extbuf)) >= 0) { 1903 printf("%d segments, ", segments); 1904 printf("%d left\n", rh->ip6r_segleft); 1905 } else { 1906 printf("segments unknown, "); 1907 printf("%d left\n", rh->ip6r_segleft); 1908 return; 1909 } 1910 1911 /* 1912 * Bounds checking on the ancillary data buffer. When calculating 1913 * the number of items to show keep in mind: 1914 * - The size of the cmsg structure 1915 * - The size of one segment (the size of a Type 0 routing header) 1916 * - When dividing add a fudge factor of one in case the 1917 * dividend is not evenly divisible by the divisor 1918 */ 1919 rthsize = (rh->ip6r_len + 1) * 8; 1920 if (bufsize < (rthsize + CMSG_SPACE(0))) { 1921 origsegs = segments; 1922 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0); 1923 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1); 1924 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) / 1925 (size1 - size0) + 1; 1926 warnx("segments truncated, showing only %d (total=%d)", 1927 segments, origsegs); 1928 } 1929 1930 for (i = 0; i < segments; i++) { 1931 in6 = inet6_rth_getaddr(extbuf, i); 1932 if (in6 == NULL) 1933 printf(" [%d]<NULL>\n", i); 1934 else { 1935 if (!inet_ntop(AF_INET6, in6, ntopbuf, 1936 sizeof(ntopbuf))) 1937 strlcpy(ntopbuf, "?", sizeof(ntopbuf)); 1938 printf(" [%d]%s\n", i, ntopbuf); 1939 } 1940 } 1941 1942 return; 1943 1944} 1945 1946#else /* !USE_RFC2292BIS */ 1947/* ARGSUSED */ 1948void 1949pr_rthdr(void *extbuf, size_t bufsize __unused) 1950{ 1951 putchar('\n'); 1952 return; 1953} 1954#endif /* USE_RFC2292BIS */ 1955 1956int 1957pr_bitrange(u_int32_t v, int soff, int ii) 1958{ 1959 int off; 1960 int i; 1961 1962 off = 0; 1963 while (off < 32) { 1964 /* shift till we have 0x01 */ 1965 if ((v & 0x01) == 0) { 1966 if (ii > 1) 1967 printf("-%u", soff + off - 1); 1968 ii = 0; 1969 switch (v & 0x0f) { 1970 case 0x00: 1971 v >>= 4; 1972 off += 4; 1973 continue; 1974 case 0x08: 1975 v >>= 3; 1976 off += 3; 1977 continue; 1978 case 0x04: case 0x0c: 1979 v >>= 2; 1980 off += 2; 1981 continue; 1982 default: 1983 v >>= 1; 1984 off += 1; 1985 continue; 1986 } 1987 } 1988 1989 /* we have 0x01 with us */ 1990 for (i = 0; i < 32 - off; i++) { 1991 if ((v & (0x01 << i)) == 0) 1992 break; 1993 } 1994 if (!ii) 1995 printf(" %u", soff + off); 1996 ii += i; 1997 v >>= i; off += i; 1998 } 1999 return ii; 2000} 2001 2002void 2003pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 2004 /* ni->qtype must be SUPTYPES */ 2005{ 2006 size_t clen; 2007 u_int32_t v; 2008 const u_char *cp, *end; 2009 u_int16_t cur; 2010 struct cbit { 2011 u_int16_t words; /*32bit count*/ 2012 u_int16_t skip; 2013 } cbit; 2014#define MAXQTYPES (1 << 16) 2015 size_t off; 2016 int b; 2017 2018 cp = (u_char *)(ni + 1); 2019 end = ((u_char *)ni) + nilen; 2020 cur = 0; 2021 b = 0; 2022 2023 printf("NodeInfo Supported Qtypes"); 2024 if (options & F_VERBOSE) { 2025 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 2026 printf(", compressed bitmap"); 2027 else 2028 printf(", raw bitmap"); 2029 } 2030 2031 while (cp < end) { 2032 clen = (size_t)(end - cp); 2033 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 2034 if (clen == 0 || clen > MAXQTYPES / 8 || 2035 clen % sizeof(v)) { 2036 printf("???"); 2037 return; 2038 } 2039 } else { 2040 if (clen < sizeof(cbit) || clen % sizeof(v)) 2041 return; 2042 memcpy(&cbit, cp, sizeof(cbit)); 2043 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 2044 clen) 2045 return; 2046 cp += sizeof(cbit); 2047 clen = ntohs(cbit.words) * sizeof(v); 2048 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 2049 MAXQTYPES) 2050 return; 2051 } 2052 2053 for (off = 0; off < clen; off += sizeof(v)) { 2054 memcpy(&v, cp + off, sizeof(v)); 2055 v = (u_int32_t)ntohl(v); 2056 b = pr_bitrange(v, (int)(cur + off * 8), b); 2057 } 2058 /* flush the remaining bits */ 2059 b = pr_bitrange(0, (int)(cur + off * 8), b); 2060 2061 cp += clen; 2062 cur += clen * 8; 2063 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 2064 cur += ntohs(cbit.skip) * 32; 2065 } 2066} 2067 2068void 2069pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 2070 /* ni->qtype must be NODEADDR */ 2071{ 2072 u_char *cp = (u_char *)(ni + 1); 2073 char ntop_buf[INET6_ADDRSTRLEN]; 2074 int withttl = 0; 2075 2076 nilen -= sizeof(struct icmp6_nodeinfo); 2077 2078 if (options & F_VERBOSE) { 2079 switch (ni->ni_code) { 2080 case ICMP6_NI_REFUSED: 2081 (void)printf("refused"); 2082 break; 2083 case ICMP6_NI_UNKNOWN: 2084 (void)printf("unknown qtype"); 2085 break; 2086 } 2087 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 2088 (void)printf(" truncated"); 2089 } 2090 putchar('\n'); 2091 if (nilen <= 0) 2092 printf(" no address\n"); 2093 2094 /* 2095 * In icmp-name-lookups 05 and later, TTL of each returned address 2096 * is contained in the resposne. We try to detect the version 2097 * by the length of the data, but note that the detection algorithm 2098 * is incomplete. We assume the latest draft by default. 2099 */ 2100 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 2101 withttl = 1; 2102 while (nilen > 0) { 2103 u_int32_t ttl; 2104 2105 if (withttl) { 2106 /* XXX: alignment? */ 2107 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp); 2108 cp += sizeof(u_int32_t); 2109 nilen -= sizeof(u_int32_t); 2110 } 2111 2112 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 2113 NULL) 2114 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2115 printf(" %s", ntop_buf); 2116 if (withttl) { 2117 if (ttl == 0xffffffff) { 2118 /* 2119 * XXX: can this convention be applied to all 2120 * type of TTL (i.e. non-ND TTL)? 2121 */ 2122 printf("(TTL=infty)"); 2123 } 2124 else 2125 printf("(TTL=%u)", ttl); 2126 } 2127 putchar('\n'); 2128 2129 nilen -= sizeof(struct in6_addr); 2130 cp += sizeof(struct in6_addr); 2131 } 2132} 2133 2134int 2135get_hoplim(struct msghdr *mhdr) 2136{ 2137 struct cmsghdr *cm; 2138 2139 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2140 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2141 if (cm->cmsg_len == 0) 2142 return(-1); 2143 2144 if (cm->cmsg_level == IPPROTO_IPV6 && 2145 cm->cmsg_type == IPV6_HOPLIMIT && 2146 cm->cmsg_len == CMSG_LEN(sizeof(int))) 2147 return(*(int *)CMSG_DATA(cm)); 2148 } 2149 2150 return(-1); 2151} 2152 2153struct in6_pktinfo * 2154get_rcvpktinfo(struct msghdr *mhdr) 2155{ 2156 struct cmsghdr *cm; 2157 2158 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2159 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2160 if (cm->cmsg_len == 0) 2161 return(NULL); 2162 2163 if (cm->cmsg_level == IPPROTO_IPV6 && 2164 cm->cmsg_type == IPV6_PKTINFO && 2165 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) 2166 return((struct in6_pktinfo *)CMSG_DATA(cm)); 2167 } 2168 2169 return(NULL); 2170} 2171 2172int 2173get_pathmtu(struct msghdr *mhdr) 2174{ 2175#ifdef IPV6_RECVPATHMTU 2176 struct cmsghdr *cm; 2177 struct ip6_mtuinfo *mtuctl = NULL; 2178 2179 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2180 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2181 if (cm->cmsg_len == 0) 2182 return(0); 2183 2184 if (cm->cmsg_level == IPPROTO_IPV6 && 2185 cm->cmsg_type == IPV6_PATHMTU && 2186 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2187 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm); 2188 2189 /* 2190 * If the notified destination is different from 2191 * the one we are pinging, just ignore the info. 2192 * We check the scope ID only when both notified value 2193 * and our own value have non-0 values, because we may 2194 * have used the default scope zone ID for sending, 2195 * in which case the scope ID value is 0. 2196 */ 2197 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr, 2198 &dst.sin6_addr) || 2199 (mtuctl->ip6m_addr.sin6_scope_id && 2200 dst.sin6_scope_id && 2201 mtuctl->ip6m_addr.sin6_scope_id != 2202 dst.sin6_scope_id)) { 2203 if ((options & F_VERBOSE) != 0) { 2204 printf("path MTU for %s is notified. " 2205 "(ignored)\n", 2206 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr, 2207 sizeof(mtuctl->ip6m_addr))); 2208 } 2209 return(0); 2210 } 2211 2212 /* 2213 * Ignore an invalid MTU. XXX: can we just believe 2214 * the kernel check? 2215 */ 2216 if (mtuctl->ip6m_mtu < IPV6_MMTU) 2217 return(0); 2218 2219 /* notification for our destination. return the MTU. */ 2220 return((int)mtuctl->ip6m_mtu); 2221 } 2222 } 2223#endif 2224 return(0); 2225} 2226 2227/* 2228 * tvsub -- 2229 * Subtract 2 timeval structs: out = out - in. Out is assumed to 2230 * be >= in. 2231 */ 2232void 2233tvsub(struct timeval *out, struct timeval *in) 2234{ 2235 if ((out->tv_usec -= in->tv_usec) < 0) { 2236 --out->tv_sec; 2237 out->tv_usec += 1000000; 2238 } 2239 out->tv_sec -= in->tv_sec; 2240} 2241 2242/* 2243 * onint -- 2244 * SIGINT handler. 2245 */ 2246/* ARGSUSED */ 2247void 2248onint(int notused __unused) 2249{ 2250 summary(); 2251 2252 if (res != NULL) 2253 freeaddrinfo(res); 2254 2255 if(packet != NULL) 2256 free(packet); 2257 2258#ifndef HAVE_POLL_H 2259 if(fdmaskp != NULL) 2260 free(fdmaskp); 2261#endif 2262 2263 (void)signal(SIGINT, SIG_DFL); 2264 (void)kill(getpid(), SIGINT); 2265 2266 /* NOTREACHED */ 2267 exit(1); 2268} 2269 2270/* 2271 * summary -- 2272 * Print out statistics. 2273 */ 2274void 2275summary(void) 2276{ 2277 2278 (void)printf("\n--- %s ping6 statistics ---\n", hostname); 2279 (void)printf("%ld packets transmitted, ", ntransmitted); 2280 (void)printf("%ld packets received, ", nreceived); 2281 if (nrepeats) 2282 (void)printf("+%ld duplicates, ", nrepeats); 2283 if (ntransmitted) { 2284 if (nreceived > ntransmitted) 2285 (void)printf("-- somebody's duplicating packets!"); 2286 else 2287 (void)printf("%.1f%% packet loss", 2288 ((((double)ntransmitted - nreceived) * 100.0) / 2289 ntransmitted)); 2290 } 2291 (void)putchar('\n'); 2292 if (nreceived && timing) { 2293 /* Only display average to microseconds */ 2294 double num = nreceived + nrepeats; 2295 double avg = tsum / num; 2296 double dev = sqrt(tsumsq / num - avg * avg); 2297 (void)printf( 2298 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2299 tmin, avg, tmax, dev); 2300 (void)fflush(stdout); 2301 } 2302 (void)fflush(stdout); 2303} 2304 2305/*subject type*/ 2306static const char *niqcode[] = { 2307 "IPv6 address", 2308 "DNS label", /*or empty*/ 2309 "IPv4 address", 2310}; 2311 2312/*result code*/ 2313static const char *nircode[] = { 2314 "Success", "Refused", "Unknown", 2315}; 2316 2317 2318/* 2319 * pr_icmph -- 2320 * Print a descriptive string about an ICMP header. 2321 */ 2322void 2323pr_icmph(struct icmp6_hdr *icp, u_char *end) 2324{ 2325 char ntop_buf[INET6_ADDRSTRLEN]; 2326 struct nd_redirect *red; 2327 struct icmp6_nodeinfo *ni; 2328 char dnsname[MAXDNAME + 1]; 2329 const u_char *cp; 2330 size_t l; 2331 2332 switch (icp->icmp6_type) { 2333 case ICMP6_DST_UNREACH: 2334 switch (icp->icmp6_code) { 2335 case ICMP6_DST_UNREACH_NOROUTE: 2336 (void)printf("No Route to Destination\n"); 2337 break; 2338 case ICMP6_DST_UNREACH_ADMIN: 2339 (void)printf("Destination Administratively " 2340 "Unreachable\n"); 2341 break; 2342 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2343 (void)printf("Destination Unreachable Beyond Scope\n"); 2344 break; 2345 case ICMP6_DST_UNREACH_ADDR: 2346 (void)printf("Destination Host Unreachable\n"); 2347 break; 2348 case ICMP6_DST_UNREACH_NOPORT: 2349 (void)printf("Destination Port Unreachable\n"); 2350 break; 2351 default: 2352 (void)printf("Destination Unreachable, Bad Code: %d\n", 2353 icp->icmp6_code); 2354 break; 2355 } 2356 /* Print returned IP header information */ 2357 pr_retip((struct ip6_hdr *)(icp + 1), end); 2358 break; 2359 case ICMP6_PACKET_TOO_BIG: 2360 (void)printf("Packet too big mtu = %d\n", 2361 (int)ntohl(icp->icmp6_mtu)); 2362 pr_retip((struct ip6_hdr *)(icp + 1), end); 2363 break; 2364 case ICMP6_TIME_EXCEEDED: 2365 switch (icp->icmp6_code) { 2366 case ICMP6_TIME_EXCEED_TRANSIT: 2367 (void)printf("Time to live exceeded\n"); 2368 break; 2369 case ICMP6_TIME_EXCEED_REASSEMBLY: 2370 (void)printf("Frag reassembly time exceeded\n"); 2371 break; 2372 default: 2373 (void)printf("Time exceeded, Bad Code: %d\n", 2374 icp->icmp6_code); 2375 break; 2376 } 2377 pr_retip((struct ip6_hdr *)(icp + 1), end); 2378 break; 2379 case ICMP6_PARAM_PROB: 2380 (void)printf("Parameter problem: "); 2381 switch (icp->icmp6_code) { 2382 case ICMP6_PARAMPROB_HEADER: 2383 (void)printf("Erroneous Header "); 2384 break; 2385 case ICMP6_PARAMPROB_NEXTHEADER: 2386 (void)printf("Unknown Nextheader "); 2387 break; 2388 case ICMP6_PARAMPROB_OPTION: 2389 (void)printf("Unrecognized Option "); 2390 break; 2391 default: 2392 (void)printf("Bad code(%d) ", icp->icmp6_code); 2393 break; 2394 } 2395 (void)printf("pointer = 0x%02x\n", 2396 (u_int32_t)ntohl(icp->icmp6_pptr)); 2397 pr_retip((struct ip6_hdr *)(icp + 1), end); 2398 break; 2399 case ICMP6_ECHO_REQUEST: 2400 (void)printf("Echo Request"); 2401 /* XXX ID + Seq + Data */ 2402 break; 2403 case ICMP6_ECHO_REPLY: 2404 (void)printf("Echo Reply"); 2405 /* XXX ID + Seq + Data */ 2406 break; 2407 case ICMP6_MEMBERSHIP_QUERY: 2408 (void)printf("Listener Query"); 2409 break; 2410 case ICMP6_MEMBERSHIP_REPORT: 2411 (void)printf("Listener Report"); 2412 break; 2413 case ICMP6_MEMBERSHIP_REDUCTION: 2414 (void)printf("Listener Done"); 2415 break; 2416 case ND_ROUTER_SOLICIT: 2417 (void)printf("Router Solicitation"); 2418 break; 2419 case ND_ROUTER_ADVERT: 2420 (void)printf("Router Advertisement"); 2421 break; 2422 case ND_NEIGHBOR_SOLICIT: 2423 (void)printf("Neighbor Solicitation"); 2424 break; 2425 case ND_NEIGHBOR_ADVERT: 2426 (void)printf("Neighbor Advertisement"); 2427 break; 2428 case ND_REDIRECT: 2429 red = (struct nd_redirect *)icp; 2430 (void)printf("Redirect\n"); 2431 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2432 sizeof(ntop_buf))) 2433 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2434 (void)printf("Destination: %s", ntop_buf); 2435 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2436 sizeof(ntop_buf))) 2437 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2438 (void)printf(" New Target: %s", ntop_buf); 2439 break; 2440 case ICMP6_NI_QUERY: 2441 (void)printf("Node Information Query"); 2442 /* XXX ID + Seq + Data */ 2443 ni = (struct icmp6_nodeinfo *)icp; 2444 l = end - (u_char *)(ni + 1); 2445 printf(", "); 2446 switch (ntohs(ni->ni_qtype)) { 2447 case NI_QTYPE_NOOP: 2448 (void)printf("NOOP"); 2449 break; 2450 case NI_QTYPE_SUPTYPES: 2451 (void)printf("Supported qtypes"); 2452 break; 2453 case NI_QTYPE_FQDN: 2454 (void)printf("DNS name"); 2455 break; 2456 case NI_QTYPE_NODEADDR: 2457 (void)printf("nodeaddr"); 2458 break; 2459 case NI_QTYPE_IPV4ADDR: 2460 (void)printf("IPv4 nodeaddr"); 2461 break; 2462 default: 2463 (void)printf("unknown qtype"); 2464 break; 2465 } 2466 if (options & F_VERBOSE) { 2467 switch (ni->ni_code) { 2468 case ICMP6_NI_SUBJ_IPV6: 2469 if (l == sizeof(struct in6_addr) && 2470 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2471 sizeof(ntop_buf)) != NULL) { 2472 (void)printf(", subject=%s(%s)", 2473 niqcode[ni->ni_code], ntop_buf); 2474 } else { 2475#if 1 2476 /* backward compat to -W */ 2477 (void)printf(", oldfqdn"); 2478#else 2479 (void)printf(", invalid"); 2480#endif 2481 } 2482 break; 2483 case ICMP6_NI_SUBJ_FQDN: 2484 if (end == (u_char *)(ni + 1)) { 2485 (void)printf(", no subject"); 2486 break; 2487 } 2488 printf(", subject=%s", niqcode[ni->ni_code]); 2489 cp = (const u_char *)(ni + 1); 2490 if (dnsdecode(&cp, end, NULL, dnsname, 2491 sizeof(dnsname)) != NULL) 2492 printf("(%s)", dnsname); 2493 else 2494 printf("(invalid)"); 2495 break; 2496 case ICMP6_NI_SUBJ_IPV4: 2497 if (l == sizeof(struct in_addr) && 2498 inet_ntop(AF_INET, ni + 1, ntop_buf, 2499 sizeof(ntop_buf)) != NULL) { 2500 (void)printf(", subject=%s(%s)", 2501 niqcode[ni->ni_code], ntop_buf); 2502 } else 2503 (void)printf(", invalid"); 2504 break; 2505 default: 2506 (void)printf(", invalid"); 2507 break; 2508 } 2509 } 2510 break; 2511 case ICMP6_NI_REPLY: 2512 (void)printf("Node Information Reply"); 2513 /* XXX ID + Seq + Data */ 2514 ni = (struct icmp6_nodeinfo *)icp; 2515 printf(", "); 2516 switch (ntohs(ni->ni_qtype)) { 2517 case NI_QTYPE_NOOP: 2518 (void)printf("NOOP"); 2519 break; 2520 case NI_QTYPE_SUPTYPES: 2521 (void)printf("Supported qtypes"); 2522 break; 2523 case NI_QTYPE_FQDN: 2524 (void)printf("DNS name"); 2525 break; 2526 case NI_QTYPE_NODEADDR: 2527 (void)printf("nodeaddr"); 2528 break; 2529 case NI_QTYPE_IPV4ADDR: 2530 (void)printf("IPv4 nodeaddr"); 2531 break; 2532 default: 2533 (void)printf("unknown qtype"); 2534 break; 2535 } 2536 if (options & F_VERBOSE) { 2537 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0])) 2538 printf(", invalid"); 2539 else 2540 printf(", %s", nircode[ni->ni_code]); 2541 } 2542 break; 2543 default: 2544 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2545 } 2546} 2547 2548/* 2549 * pr_iph -- 2550 * Print an IP6 header. 2551 */ 2552void 2553pr_iph(struct ip6_hdr *ip6) 2554{ 2555 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2556 u_int8_t tc; 2557 char ntop_buf[INET6_ADDRSTRLEN]; 2558 2559 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2560 tc = (tc >> 4) & 0x0f; 2561 tc |= (ip6->ip6_vfc << 4); 2562 2563 printf("Vr TC Flow Plen Nxt Hlim\n"); 2564 printf(" %1x %02x %05x %04x %02x %02x\n", 2565 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2566 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2567 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2568 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2569 printf("%s->", ntop_buf); 2570 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2571 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2572 printf("%s\n", ntop_buf); 2573} 2574 2575/* 2576 * pr_addr -- 2577 * Return an ascii host address as a dotted quad and optionally with 2578 * a hostname. 2579 */ 2580const char * 2581pr_addr(struct sockaddr *addr, int addrlen) 2582{ 2583 static char buf[NI_MAXHOST]; 2584 int flag = 0; 2585 2586 if ((options & F_HOSTNAME) == 0) 2587 flag |= NI_NUMERICHOST; 2588 2589 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) 2590 return (buf); 2591 else 2592 return "?"; 2593} 2594 2595/* 2596 * pr_retip -- 2597 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2598 */ 2599void 2600pr_retip(struct ip6_hdr *ip6, u_char *end) 2601{ 2602 u_char *cp = (u_char *)ip6, nh; 2603 int hlen; 2604 2605 if (end - (u_char *)ip6 < sizeof(*ip6)) { 2606 printf("IP6"); 2607 goto trunc; 2608 } 2609 pr_iph(ip6); 2610 hlen = sizeof(*ip6); 2611 2612 nh = ip6->ip6_nxt; 2613 cp += hlen; 2614 while (end - cp >= 8) { 2615 switch (nh) { 2616 case IPPROTO_HOPOPTS: 2617 printf("HBH "); 2618 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2619 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2620 break; 2621 case IPPROTO_DSTOPTS: 2622 printf("DSTOPT "); 2623 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2624 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2625 break; 2626 case IPPROTO_FRAGMENT: 2627 printf("FRAG "); 2628 hlen = sizeof(struct ip6_frag); 2629 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2630 break; 2631 case IPPROTO_ROUTING: 2632 printf("RTHDR "); 2633 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2634 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2635 break; 2636#ifdef IPSEC 2637 case IPPROTO_AH: 2638 printf("AH "); 2639 hlen = (((struct ah *)cp)->ah_len+2) << 2; 2640 nh = ((struct ah *)cp)->ah_nxt; 2641 break; 2642#endif 2643 case IPPROTO_ICMPV6: 2644 printf("ICMP6: type = %d, code = %d\n", 2645 *cp, *(cp + 1)); 2646 return; 2647 case IPPROTO_ESP: 2648 printf("ESP\n"); 2649 return; 2650 case IPPROTO_TCP: 2651 printf("TCP: from port %u, to port %u (decimal)\n", 2652 (*cp * 256 + *(cp + 1)), 2653 (*(cp + 2) * 256 + *(cp + 3))); 2654 return; 2655 case IPPROTO_UDP: 2656 printf("UDP: from port %u, to port %u (decimal)\n", 2657 (*cp * 256 + *(cp + 1)), 2658 (*(cp + 2) * 256 + *(cp + 3))); 2659 return; 2660 default: 2661 printf("Unknown Header(%d)\n", nh); 2662 return; 2663 } 2664 2665 if ((cp += hlen) >= end) 2666 goto trunc; 2667 } 2668 if (end - cp < 8) 2669 goto trunc; 2670 2671 putchar('\n'); 2672 return; 2673 2674 trunc: 2675 printf("...\n"); 2676 return; 2677} 2678 2679void 2680fill(char *bp, char *patp) 2681{ 2682 int ii, jj, kk; 2683 int pat[16]; 2684 char *cp; 2685 2686 for (cp = patp; *cp; cp++) 2687 if (!isxdigit(*cp)) 2688 errx(1, "patterns must be specified as hex digits"); 2689 ii = sscanf(patp, 2690 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2691 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2692 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2693 &pat[13], &pat[14], &pat[15]); 2694 2695/* xxx */ 2696 if (ii > 0) 2697 for (kk = 0; 2698 kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii); 2699 kk += ii) 2700 for (jj = 0; jj < ii; ++jj) 2701 bp[jj + kk] = pat[jj]; 2702 if (!(options & F_QUIET)) { 2703 (void)printf("PATTERN: 0x"); 2704 for (jj = 0; jj < ii; ++jj) 2705 (void)printf("%02x", bp[jj] & 0xFF); 2706 (void)printf("\n"); 2707 } 2708} 2709 2710#ifdef IPSEC 2711#ifdef IPSEC_POLICY_IPSEC 2712int 2713setpolicy(int so __unused, char *policy) 2714{ 2715 char *buf; 2716 2717 if (policy == NULL) 2718 return 0; /* ignore */ 2719 2720 buf = ipsec_set_policy(policy, strlen(policy)); 2721 if (buf == NULL) 2722 errx(1, "%s", ipsec_strerror()); 2723 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2724 ipsec_get_policylen(buf)) < 0) 2725 warnx("Unable to set IPsec policy"); 2726 free(buf); 2727 2728 return 0; 2729} 2730#endif 2731#endif 2732 2733char * 2734nigroup(char *name, int nig_oldmcprefix) 2735{ 2736 char *p; 2737 char *q; 2738 MD5_CTX ctxt; 2739 u_int8_t digest[16]; 2740 u_int8_t c; 2741 size_t l; 2742 char hbuf[NI_MAXHOST]; 2743 struct in6_addr in6; 2744 int valid; 2745 2746 p = strchr(name, '.'); 2747 if (!p) 2748 p = name + strlen(name); 2749 l = p - name; 2750 if (l > 63 || l > sizeof(hbuf) - 1) 2751 return NULL; /*label too long*/ 2752 strncpy(hbuf, name, l); 2753 hbuf[(int)l] = '\0'; 2754 2755 for (q = name; *q; q++) { 2756 if (isupper(*(unsigned char *)q)) 2757 *q = tolower(*(unsigned char *)q); 2758 } 2759 2760 /* generate 16 bytes of pseudo-random value. */ 2761 memset(&ctxt, 0, sizeof(ctxt)); 2762 MD5Init(&ctxt); 2763 c = l & 0xff; 2764 MD5Update(&ctxt, &c, sizeof(c)); 2765 MD5Update(&ctxt, (unsigned char *)name, l); 2766 MD5Final(digest, &ctxt); 2767 2768 if (nig_oldmcprefix) { 2769 /* draft-ietf-ipngwg-icmp-name-lookup */ 2770 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6); 2771 } else { 2772 /* RFC 4620 */ 2773 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6); 2774 } 2775 if (valid != 1) 2776 return NULL; /*XXX*/ 2777 2778 if (nig_oldmcprefix) { 2779 /* draft-ietf-ipngwg-icmp-name-lookup */ 2780 bcopy(digest, &in6.s6_addr[12], 4); 2781 } else { 2782 /* RFC 4620 */ 2783 bcopy(digest, &in6.s6_addr[13], 3); 2784 } 2785 2786 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2787 return NULL; 2788 2789 return strdup(hbuf); 2790} 2791 2792void 2793usage(void) 2794{ 2795 (void)fprintf(stderr, 2796#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 2797 "A" 2798#endif 2799 "usage: ping6 [-" 2800 "Dd" 2801#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 2802 "E" 2803#endif 2804 "fH" 2805#ifdef IPV6_USE_MIN_MTU 2806 "m" 2807#endif 2808 "nNoqrRtvwW] " 2809 "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n" 2810 " [-h hoplimit] [-I interface] [-i wait] [-l preload]" 2811#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2812 " [-P policy]" 2813#endif 2814 "\n" 2815 " [-p pattern] [-S sourceaddr] [-s packetsize] " 2816 "[hops ...] host\n"); 2817 exit(1); 2818} 2819