1 /* $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */ 35 36 /* 37 * Copyright (c) 1989, 1993 38 * The Regents of the University of California. All rights reserved. 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Mike Muuss. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 #if 0 69 #ifndef lint 70 static const char copyright[] = 71 "@(#) Copyright (c) 1989, 1993\n\ 72 The Regents of the University of California. All rights reserved.\n"; 73 #endif /* not lint */ 74 75 #ifndef lint 76 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 77 #endif /* not lint */ 78 #endif 79 80 #include <sys/cdefs.h> 81 __FBSDID("$FreeBSD$"); 82 83 /* 84 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 85 * measure round-trip-delays and packet loss across network paths. 86 * 87 * Author - 88 * Mike Muuss 89 * U. S. Army Ballistic Research Laboratory 90 * December, 1983 91 * 92 * Status - 93 * Public Domain. Distribution Unlimited. 94 * Bugs - 95 * More statistics could always be gathered. 96 * This program has to run SUID to ROOT to access the ICMP socket. 97 */ 98 /* 99 * NOTE: 100 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics 101 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link* 102 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of 103 * network attached to 1 or more interfaces) 104 */ 105 106 #include <sys/param.h> 107 #include <sys/capsicum.h> 108 #include <sys/uio.h> 109 #include <sys/socket.h> 110 111 #include <net/if.h> 112 #include <net/route.h> 113 114 #include <netinet/in.h> 115 #include <netinet/ip6.h> 116 #include <netinet/icmp6.h> 117 #include <arpa/inet.h> 118 #include <arpa/nameser.h> 119 #include <netdb.h> 120 121 #include <capsicum_helpers.h> 122 #include <casper/cap_dns.h> 123 #include <libcasper.h> 124 125 #include <ctype.h> 126 #include <err.h> 127 #include <errno.h> 128 #include <fcntl.h> 129 #include <math.h> 130 #include <signal.h> 131 #include <stdio.h> 132 #include <stdlib.h> 133 #include <string.h> 134 #include <sysexits.h> 135 #include <time.h> 136 #include <unistd.h> 137 138 #ifdef IPSEC 139 #include <netipsec/ah.h> 140 #include <netipsec/ipsec.h> 141 #endif 142 143 #include <md5.h> 144 145 #include "main.h" 146 #include "ping6.h" 147 148 struct tv32 { 149 u_int32_t tv32_sec; 150 u_int32_t tv32_nsec; 151 }; 152 153 #define MAXPACKETLEN 131072 154 #define IP6LEN 40 155 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ 156 #define ICMP6ECHOTMLEN sizeof(struct tv32) 157 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8) 158 # define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */ 159 /* FQDN case, 64 bits of nonce + 32 bits ttl */ 160 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) 161 #define EXTRA 256 /* for AH and various other headers. weird. */ 162 #define DEFDATALEN ICMP6ECHOTMLEN 163 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN 164 #define NROUTES 9 /* number of record route slots */ 165 #define MAXWAIT 10000 /* max ms to wait for response */ 166 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 167 168 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 169 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 170 #define SET(bit) (A(bit) |= B(bit)) 171 #define CLR(bit) (A(bit) &= (~B(bit))) 172 #define TST(bit) (A(bit) & B(bit)) 173 174 #define F_FLOOD 0x0001 175 #define F_INTERVAL 0x0002 176 #define F_PINGFILLED 0x0008 177 #define F_QUIET 0x0010 178 #define F_RROUTE 0x0020 179 #define F_SO_DEBUG 0x0040 180 #define F_VERBOSE 0x0100 181 #ifdef IPSEC 182 #ifdef IPSEC_POLICY_IPSEC 183 #define F_POLICY 0x0400 184 #else 185 #define F_AUTHHDR 0x0200 186 #define F_ENCRYPT 0x0400 187 #endif /*IPSEC_POLICY_IPSEC*/ 188 #endif /*IPSEC*/ 189 #define F_NODEADDR 0x0800 190 #define F_FQDN 0x1000 191 #define F_INTERFACE 0x2000 192 #define F_SRCADDR 0x4000 193 #define F_HOSTNAME 0x10000 194 #define F_FQDNOLD 0x20000 195 #define F_NIGROUP 0x40000 196 #define F_SUPTYPES 0x80000 197 #define F_NOMINMTU 0x100000 198 #define F_ONCE 0x200000 199 #define F_AUDIBLE 0x400000 200 #define F_MISSED 0x800000 201 #define F_DONTFRAG 0x1000000 202 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES) 203 #define F_WAITTIME 0x2000000 204 #define F_DOT 0x4000000 205 static u_int options; 206 207 #define IN6LEN sizeof(struct in6_addr) 208 #define SA6LEN sizeof(struct sockaddr_in6) 209 #define DUMMY_PORT 10101 210 211 #define SIN6(s) ((struct sockaddr_in6 *)(s)) 212 213 /* 214 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 215 * number of received sequence numbers we can keep track of. Change 128 216 * to 8192 for complete accuracy... 217 */ 218 #define MAX_DUP_CHK (8 * 8192) 219 static int mx_dup_ck = MAX_DUP_CHK; 220 static char rcvd_tbl[MAX_DUP_CHK / 8]; 221 222 static struct sockaddr_in6 dst; /* who to ping6 */ 223 static struct sockaddr_in6 src; /* src addr of this packet */ 224 static socklen_t srclen; 225 static size_t datalen = DEFDATALEN; 226 static int ssend; /* send socket file descriptor */ 227 static int srecv; /* receive socket file descriptor */ 228 static u_char outpack[MAXPACKETLEN]; 229 static char BSPACE = '\b'; /* characters written for flood */ 230 static char BBELL = '\a'; /* characters written for AUDIBLE */ 231 static const char *DOT = "."; 232 static size_t DOTlen = 1; 233 static size_t DOTidx = 0; 234 static char *hostname; 235 static int ident; /* process id to identify our packets */ 236 static u_int8_t nonce[8]; /* nonce field for node information */ 237 static int hoplimit = -1; /* hoplimit */ 238 static int tclass = -1; /* traffic class */ 239 static int pcp = -2; /* vlan priority code point */ 240 static u_char *packet = NULL; 241 static cap_channel_t *capdns; 242 243 /* counters */ 244 static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 245 static long npackets; /* max packets to transmit */ 246 static long nreceived; /* # of packets we got back */ 247 static long nrepeats; /* number of duplicates */ 248 static long ntransmitted; /* sequence # for outbound packets = #sent */ 249 static long ntransmitfailures; /* number of transmit failures */ 250 static int interval = 1000; /* interval between packets in ms */ 251 static int waittime = MAXWAIT; /* timeout for each packet */ 252 static long nrcvtimeout = 0; /* # of packets we got back after waittime */ 253 254 /* timing */ 255 static int timing; /* flag to do timing */ 256 static double tmin = 999999999.0; /* minimum round trip time */ 257 static double tmax = 0.0; /* maximum round trip time */ 258 static double tsum = 0.0; /* sum of all times, for doing average */ 259 static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 260 261 /* for node addresses */ 262 static u_short naflags; 263 264 /* for ancillary data(advanced API) */ 265 static struct msghdr smsghdr; 266 static struct iovec smsgiov; 267 static char *scmsg = 0; 268 269 static volatile sig_atomic_t seenint; 270 #ifdef SIGINFO 271 static volatile sig_atomic_t seeninfo; 272 #endif 273 274 static cap_channel_t *capdns_setup(void); 275 static void fill(char *, char *); 276 static int get_hoplim(struct msghdr *); 277 static int get_pathmtu(struct msghdr *); 278 static struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); 279 static void onsignal(int); 280 static void onint(int); 281 static size_t pingerlen(void); 282 static int pinger(void); 283 static const char *pr_addr(struct sockaddr *, int); 284 static void pr_icmph(struct icmp6_hdr *, u_char *); 285 static void pr_iph(struct ip6_hdr *); 286 static void pr_suptypes(struct icmp6_nodeinfo *, size_t); 287 static void pr_nodeaddr(struct icmp6_nodeinfo *, int); 288 static int myechoreply(const struct icmp6_hdr *); 289 static int mynireply(const struct icmp6_nodeinfo *); 290 static const char *dnsdecode(const u_char *, const u_char *, const u_char *, 291 char *, size_t); 292 static void pr_pack(u_char *, int, struct msghdr *); 293 static void pr_exthdrs(struct msghdr *); 294 static void pr_ip6opt(void *, size_t); 295 static void pr_rthdr(void *, size_t); 296 static int pr_bitrange(u_int32_t, int, int); 297 static void pr_retip(struct ip6_hdr *, u_char *); 298 static void summary(void); 299 #ifdef IPSEC 300 #ifdef IPSEC_POLICY_IPSEC 301 static int setpolicy(int, char *); 302 #endif 303 #endif 304 static char *nigroup(char *, int); 305 306 int 307 ping6(int argc, char *argv[]) 308 { 309 struct timespec last, intvl; 310 struct sockaddr_in6 from, *sin6; 311 struct addrinfo hints, *res; 312 struct sigaction si_sa; 313 int cc, i; 314 int almost_done, ch, hold, packlen, preload, optval, error; 315 int nig_oldmcprefix = -1; 316 u_char *datap; 317 char *e, *target, *ifname = NULL, *gateway = NULL; 318 int ip6optlen = 0; 319 struct cmsghdr *scmsgp = NULL; 320 /* For control (ancillary) data received from recvmsg() */ 321 u_char cm[CONTROLLEN]; 322 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 323 u_long lsockbufsize; 324 int sockbufsize = 0; 325 #endif 326 int usepktinfo = 0; 327 struct in6_pktinfo pktinfo; 328 char *cmsg_pktinfo = NULL; 329 struct ip6_rthdr *rthdr = NULL; 330 #ifdef IPSEC_POLICY_IPSEC 331 char *policy_in = NULL; 332 char *policy_out = NULL; 333 #endif 334 double t; 335 u_long alarmtimeout; 336 size_t rthlen; 337 #ifdef IPV6_USE_MIN_MTU 338 int mflag = 0; 339 #endif 340 cap_rights_t rights_srecv; 341 cap_rights_t rights_ssend; 342 cap_rights_t rights_stdin; 343 344 /* just to be sure */ 345 memset(&smsghdr, 0, sizeof(smsghdr)); 346 memset(&smsgiov, 0, sizeof(smsgiov)); 347 memset(&pktinfo, 0, sizeof(pktinfo)); 348 349 intvl.tv_sec = interval / 1000; 350 intvl.tv_nsec = interval % 1000 * 1000000; 351 352 alarmtimeout = preload = 0; 353 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; 354 capdns = capdns_setup(); 355 356 while ((ch = getopt(argc, argv, PING6OPTS)) != -1) { 357 switch (ch) { 358 case '.': 359 options |= F_DOT; 360 if (optarg != NULL) { 361 DOT = optarg; 362 DOTlen = strlen(optarg); 363 } 364 break; 365 case '6': 366 /* This option is processed in main(). */ 367 break; 368 case 'k': 369 { 370 char *cp; 371 372 options &= ~F_NOUSERDATA; 373 options |= F_NODEADDR; 374 for (cp = optarg; *cp != '\0'; cp++) { 375 switch (*cp) { 376 case 'a': 377 naflags |= NI_NODEADDR_FLAG_ALL; 378 break; 379 case 'c': 380 case 'C': 381 naflags |= NI_NODEADDR_FLAG_COMPAT; 382 break; 383 case 'l': 384 case 'L': 385 naflags |= NI_NODEADDR_FLAG_LINKLOCAL; 386 break; 387 case 's': 388 case 'S': 389 naflags |= NI_NODEADDR_FLAG_SITELOCAL; 390 break; 391 case 'g': 392 case 'G': 393 naflags |= NI_NODEADDR_FLAG_GLOBAL; 394 break; 395 case 'A': /* experimental. not in the spec */ 396 #ifdef NI_NODEADDR_FLAG_ANYCAST 397 naflags |= NI_NODEADDR_FLAG_ANYCAST; 398 break; 399 #else 400 errx(1, 401 "-a A is not supported on the platform"); 402 /*NOTREACHED*/ 403 #endif 404 default: 405 usage(); 406 /*NOTREACHED*/ 407 } 408 } 409 break; 410 } 411 case 'b': 412 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 413 errno = 0; 414 e = NULL; 415 lsockbufsize = strtoul(optarg, &e, 10); 416 sockbufsize = (int)lsockbufsize; 417 if (errno || !*optarg || *e || 418 lsockbufsize > INT_MAX) 419 errx(1, "invalid socket buffer size"); 420 #else 421 errx(1, 422 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported"); 423 #endif 424 break; 425 case 'C': /* vlan priority code point */ 426 pcp = strtol(optarg, &e, 10); 427 if (*optarg == '\0' || *e != '\0') 428 errx(1, "illegal vlan pcp %s", optarg); 429 if (7 < pcp || pcp < -1) 430 errx(1, "illegal vlan pcp -- %s", optarg); 431 break; 432 case 'c': 433 npackets = strtol(optarg, &e, 10); 434 if (npackets <= 0 || *optarg == '\0' || *e != '\0') 435 errx(1, 436 "illegal number of packets -- %s", optarg); 437 break; 438 case 'D': 439 options |= F_DONTFRAG; 440 break; 441 case 'd': 442 options |= F_SO_DEBUG; 443 break; 444 case 'f': 445 if (getuid()) { 446 errno = EPERM; 447 errx(1, "Must be superuser to flood ping"); 448 } 449 options |= F_FLOOD; 450 options |= F_DOT; 451 setbuf(stdout, (char *)NULL); 452 break; 453 case 'e': 454 gateway = optarg; 455 break; 456 case 'H': 457 options |= F_HOSTNAME; 458 break; 459 case 'm': /* hoplimit */ 460 hoplimit = strtol(optarg, &e, 10); 461 if (*optarg == '\0' || *e != '\0') 462 errx(1, "illegal hoplimit %s", optarg); 463 if (255 < hoplimit || hoplimit < -1) 464 errx(1, 465 "illegal hoplimit -- %s", optarg); 466 break; 467 case 'I': 468 ifname = optarg; 469 options |= F_INTERFACE; 470 #ifndef USE_SIN6_SCOPE_ID 471 usepktinfo++; 472 #endif 473 break; 474 case 'i': /* wait between sending packets */ 475 t = strtod(optarg, &e); 476 if (*optarg == '\0' || *e != '\0') 477 errx(1, "illegal timing interval %s", optarg); 478 if (t < 1 && getuid()) { 479 errx(1, "%s: only root may use interval < 1s", 480 strerror(EPERM)); 481 } 482 intvl.tv_sec = (time_t)t; 483 intvl.tv_nsec = 484 (long)((t - intvl.tv_sec) * 1000000000); 485 if (intvl.tv_sec < 0) 486 errx(1, "illegal timing interval %s", optarg); 487 /* less than 1/hz does not make sense */ 488 if (intvl.tv_sec == 0 && intvl.tv_nsec < 1000) { 489 warnx("too small interval, raised to .000001"); 490 intvl.tv_nsec = 1000; 491 } 492 options |= F_INTERVAL; 493 break; 494 case 'l': 495 if (getuid()) { 496 errno = EPERM; 497 errx(1, "Must be superuser to preload"); 498 } 499 preload = strtol(optarg, &e, 10); 500 if (preload < 0 || *optarg == '\0' || *e != '\0') 501 errx(1, "illegal preload value -- %s", optarg); 502 break; 503 case 'u': 504 #ifdef IPV6_USE_MIN_MTU 505 mflag++; 506 break; 507 #else 508 errx(1, "-%c is not supported on this platform", ch); 509 /*NOTREACHED*/ 510 #endif 511 case 'n': 512 options &= ~F_HOSTNAME; 513 break; 514 case 'N': 515 options |= F_NIGROUP; 516 nig_oldmcprefix++; 517 break; 518 case 'o': 519 options |= F_ONCE; 520 break; 521 case 'p': /* fill buffer with user pattern */ 522 options |= F_PINGFILLED; 523 fill((char *)datap, optarg); 524 break; 525 case 'q': 526 options |= F_QUIET; 527 break; 528 case 'a': 529 options |= F_AUDIBLE; 530 break; 531 case 'A': 532 options |= F_MISSED; 533 break; 534 case 'S': 535 memset(&hints, 0, sizeof(struct addrinfo)); 536 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ 537 hints.ai_family = AF_INET6; 538 hints.ai_socktype = SOCK_RAW; 539 hints.ai_protocol = IPPROTO_ICMPV6; 540 541 error = cap_getaddrinfo(capdns, optarg, NULL, &hints, &res); 542 if (error) { 543 errx(1, "invalid source address: %s", 544 gai_strerror(error)); 545 } 546 /* 547 * res->ai_family must be AF_INET6 and res->ai_addrlen 548 * must be sizeof(src). 549 */ 550 memcpy(&src, res->ai_addr, res->ai_addrlen); 551 srclen = res->ai_addrlen; 552 freeaddrinfo(res); 553 options |= F_SRCADDR; 554 break; 555 case 's': /* size of packet to send */ 556 datalen = strtol(optarg, &e, 10); 557 if (datalen <= 0 || *optarg == '\0' || *e != '\0') 558 errx(1, "illegal datalen value -- %s", optarg); 559 if (datalen > MAXDATALEN) { 560 errx(1, 561 "datalen value too large, maximum is %d", 562 MAXDATALEN); 563 } 564 break; 565 case 'O': 566 options &= ~F_NOUSERDATA; 567 options |= F_SUPTYPES; 568 break; 569 case 'v': 570 options |= F_VERBOSE; 571 break; 572 case 'y': 573 options &= ~F_NOUSERDATA; 574 options |= F_FQDN; 575 break; 576 case 'Y': 577 options &= ~F_NOUSERDATA; 578 options |= F_FQDNOLD; 579 break; 580 case 'W': 581 t = strtod(optarg, &e); 582 if (*e || e == optarg || t > (double)INT_MAX) 583 errx(EX_USAGE, "invalid timing interval: `%s'", 584 optarg); 585 options |= F_WAITTIME; 586 waittime = (int)t; 587 break; 588 case 't': 589 alarmtimeout = strtoul(optarg, &e, 0); 590 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 591 errx(EX_USAGE, "invalid timeout: `%s'", 592 optarg); 593 if (alarmtimeout > MAXALARM) 594 errx(EX_USAGE, "invalid timeout: `%s' > %d", 595 optarg, MAXALARM); 596 { 597 struct itimerval itv; 598 599 timerclear(&itv.it_interval); 600 timerclear(&itv.it_value); 601 itv.it_value.tv_sec = (time_t)alarmtimeout; 602 if (setitimer(ITIMER_REAL, &itv, NULL) != 0) 603 err(1, "setitimer"); 604 } 605 break; 606 case 'z': /* traffic class */ 607 tclass = strtol(optarg, &e, 10); 608 if (*optarg == '\0' || *e != '\0') 609 errx(1, "illegal traffic class %s", optarg); 610 if (255 < tclass || tclass < -1) 611 errx(1, 612 "illegal traffic class -- %s", optarg); 613 break; 614 #ifdef IPSEC 615 #ifdef IPSEC_POLICY_IPSEC 616 case 'P': 617 options |= F_POLICY; 618 if (!strncmp("in", optarg, 2)) { 619 if ((policy_in = strdup(optarg)) == NULL) 620 errx(1, "strdup"); 621 } else if (!strncmp("out", optarg, 3)) { 622 if ((policy_out = strdup(optarg)) == NULL) 623 errx(1, "strdup"); 624 } else 625 errx(1, "invalid security policy"); 626 break; 627 #else 628 case 'Z': 629 options |= F_AUTHHDR; 630 break; 631 case 'E': 632 options |= F_ENCRYPT; 633 break; 634 #endif /*IPSEC_POLICY_IPSEC*/ 635 #endif /*IPSEC*/ 636 default: 637 usage(); 638 /*NOTREACHED*/ 639 } 640 } 641 642 argc -= optind; 643 argv += optind; 644 645 if (argc < 1) { 646 usage(); 647 /*NOTREACHED*/ 648 } 649 650 if (argc > 1) { 651 #ifdef IPV6_RECVRTHDR /* 2292bis */ 652 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0, 653 argc - 1)); 654 #else /* RFC2292 */ 655 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1); 656 #endif 657 if (rthlen == 0) { 658 errx(1, "too many intermediate hops"); 659 /*NOTREACHED*/ 660 } 661 ip6optlen += rthlen; 662 } 663 664 if (options & F_NIGROUP) { 665 target = nigroup(argv[argc - 1], nig_oldmcprefix); 666 if (target == NULL) { 667 usage(); 668 /*NOTREACHED*/ 669 } 670 } else 671 target = argv[argc - 1]; 672 673 /* cap_getaddrinfo */ 674 memset(&hints, 0, sizeof(struct addrinfo)); 675 hints.ai_flags = AI_CANONNAME; 676 hints.ai_family = AF_INET6; 677 hints.ai_socktype = SOCK_RAW; 678 hints.ai_protocol = IPPROTO_ICMPV6; 679 680 error = cap_getaddrinfo(capdns, target, NULL, &hints, &res); 681 if (error) 682 errx(1, "%s", gai_strerror(error)); 683 if (res->ai_canonname) 684 hostname = strdup(res->ai_canonname); 685 else 686 hostname = target; 687 688 if (!res->ai_addr) 689 errx(1, "cap_getaddrinfo failed"); 690 691 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen); 692 693 if ((ssend = socket(res->ai_family, res->ai_socktype, 694 res->ai_protocol)) < 0) 695 err(1, "socket ssend"); 696 if ((srecv = socket(res->ai_family, res->ai_socktype, 697 res->ai_protocol)) < 0) 698 err(1, "socket srecv"); 699 freeaddrinfo(res); 700 701 /* set the source address if specified. */ 702 if ((options & F_SRCADDR) != 0) { 703 /* properly fill sin6_scope_id */ 704 if (IN6_IS_ADDR_LINKLOCAL(&src.sin6_addr) && ( 705 IN6_IS_ADDR_LINKLOCAL(&dst.sin6_addr) || 706 IN6_IS_ADDR_MC_LINKLOCAL(&dst.sin6_addr) || 707 IN6_IS_ADDR_MC_NODELOCAL(&dst.sin6_addr))) { 708 if (src.sin6_scope_id == 0) 709 src.sin6_scope_id = dst.sin6_scope_id; 710 if (dst.sin6_scope_id == 0) 711 dst.sin6_scope_id = src.sin6_scope_id; 712 } 713 if (bind(ssend, (struct sockaddr *)&src, srclen) != 0) 714 err(1, "bind"); 715 } 716 /* set the gateway (next hop) if specified */ 717 if (gateway) { 718 memset(&hints, 0, sizeof(hints)); 719 hints.ai_family = AF_INET6; 720 hints.ai_socktype = SOCK_RAW; 721 hints.ai_protocol = IPPROTO_ICMPV6; 722 723 error = cap_getaddrinfo(capdns, gateway, NULL, &hints, &res); 724 if (error) { 725 errx(1, "cap_getaddrinfo for the gateway %s: %s", 726 gateway, gai_strerror(error)); 727 } 728 if (res->ai_next && (options & F_VERBOSE)) 729 warnx("gateway resolves to multiple addresses"); 730 731 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_NEXTHOP, 732 res->ai_addr, res->ai_addrlen)) { 733 err(1, "setsockopt(IPV6_NEXTHOP)"); 734 } 735 736 freeaddrinfo(res); 737 } 738 739 /* 740 * let the kerel pass extension headers of incoming packets, 741 * for privileged socket options 742 */ 743 if ((options & F_VERBOSE) != 0) { 744 int opton = 1; 745 746 #ifdef IPV6_RECVHOPOPTS 747 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, 748 sizeof(opton))) 749 err(1, "setsockopt(IPV6_RECVHOPOPTS)"); 750 #else /* old adv. API */ 751 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPOPTS, &opton, 752 sizeof(opton))) 753 err(1, "setsockopt(IPV6_HOPOPTS)"); 754 #endif 755 #ifdef IPV6_RECVDSTOPTS 756 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, 757 sizeof(opton))) 758 err(1, "setsockopt(IPV6_RECVDSTOPTS)"); 759 #else /* old adv. API */ 760 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_DSTOPTS, &opton, 761 sizeof(opton))) 762 err(1, "setsockopt(IPV6_DSTOPTS)"); 763 #endif 764 #ifdef IPV6_RECVRTHDRDSTOPTS 765 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton, 766 sizeof(opton))) 767 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)"); 768 #endif 769 } 770 771 /* revoke root privilege */ 772 if (seteuid(getuid()) != 0) 773 err(1, "seteuid() failed"); 774 if (setuid(getuid()) != 0) 775 err(1, "setuid() failed"); 776 777 if ((options & F_FLOOD) && (options & F_INTERVAL)) 778 errx(1, "-f and -i incompatible options"); 779 780 if ((options & F_NOUSERDATA) == 0) { 781 if (datalen >= sizeof(struct tv32)) { 782 /* we can time transfer */ 783 timing = 1; 784 } else 785 timing = 0; 786 /* in F_VERBOSE case, we may get non-echoreply packets*/ 787 if (options & F_VERBOSE) 788 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 789 else 790 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; 791 } else { 792 /* suppress timing for node information query */ 793 timing = 0; 794 datalen = 2048; 795 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; 796 } 797 798 if (!(packet = (u_char *)malloc((u_int)packlen))) 799 err(1, "Unable to allocate packet"); 800 if (!(options & F_PINGFILLED)) 801 for (i = ICMP6ECHOLEN; i < packlen; ++i) 802 *datap++ = i; 803 804 ident = getpid() & 0xFFFF; 805 arc4random_buf(nonce, sizeof(nonce)); 806 optval = 1; 807 if (options & F_DONTFRAG) 808 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_DONTFRAG, 809 &optval, sizeof(optval)) == -1) 810 err(1, "IPV6_DONTFRAG"); 811 hold = 1; 812 813 if (options & F_SO_DEBUG) { 814 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 815 sizeof(hold)); 816 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 817 sizeof(hold)); 818 } 819 optval = IPV6_DEFHLIM; 820 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 821 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 822 &optval, sizeof(optval)) == -1) 823 err(1, "IPV6_MULTICAST_HOPS"); 824 #ifdef IPV6_USE_MIN_MTU 825 if (mflag != 1) { 826 optval = mflag > 1 ? 0 : 1; 827 828 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_USE_MIN_MTU, 829 &optval, sizeof(optval)) == -1) 830 err(1, "setsockopt(IPV6_USE_MIN_MTU)"); 831 } 832 #ifdef IPV6_RECVPATHMTU 833 else { 834 optval = 1; 835 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPATHMTU, 836 &optval, sizeof(optval)) == -1) 837 err(1, "setsockopt(IPV6_RECVPATHMTU)"); 838 } 839 #endif /* IPV6_RECVPATHMTU */ 840 #endif /* IPV6_USE_MIN_MTU */ 841 842 #ifdef IPSEC 843 #ifdef IPSEC_POLICY_IPSEC 844 if (options & F_POLICY) { 845 if (setpolicy(srecv, policy_in) < 0) 846 errx(1, "%s", ipsec_strerror()); 847 if (setpolicy(ssend, policy_out) < 0) 848 errx(1, "%s", ipsec_strerror()); 849 } 850 #else 851 if (options & F_AUTHHDR) { 852 optval = IPSEC_LEVEL_REQUIRE; 853 #ifdef IPV6_AUTH_TRANS_LEVEL 854 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 855 &optval, sizeof(optval)) == -1) 856 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 857 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, 858 &optval, sizeof(optval)) == -1) 859 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)"); 860 #else /* old def */ 861 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 862 &optval, sizeof(optval)) == -1) 863 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 864 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_LEVEL, 865 &optval, sizeof(optval)) == -1) 866 err(1, "setsockopt(IPV6_AUTH_LEVEL)"); 867 #endif 868 } 869 if (options & F_ENCRYPT) { 870 optval = IPSEC_LEVEL_REQUIRE; 871 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 872 &optval, sizeof(optval)) == -1) 873 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 874 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, 875 &optval, sizeof(optval)) == -1) 876 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)"); 877 } 878 #endif /*IPSEC_POLICY_IPSEC*/ 879 #endif 880 881 #ifdef ICMP6_FILTER 882 { 883 struct icmp6_filter filt; 884 if (!(options & F_VERBOSE)) { 885 ICMP6_FILTER_SETBLOCKALL(&filt); 886 if ((options & F_FQDN) || (options & F_FQDNOLD) || 887 (options & F_NODEADDR) || (options & F_SUPTYPES)) 888 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt); 889 else 890 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); 891 } else { 892 ICMP6_FILTER_SETPASSALL(&filt); 893 } 894 if (setsockopt(srecv, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 895 sizeof(filt)) < 0) 896 err(1, "setsockopt(ICMP6_FILTER)"); 897 } 898 #endif /*ICMP6_FILTER*/ 899 900 /* let the kerel pass extension headers of incoming packets */ 901 if ((options & F_VERBOSE) != 0) { 902 int opton = 1; 903 904 #ifdef IPV6_RECVRTHDR 905 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, 906 sizeof(opton))) 907 err(1, "setsockopt(IPV6_RECVRTHDR)"); 908 #else /* old adv. API */ 909 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RTHDR, &opton, 910 sizeof(opton))) 911 err(1, "setsockopt(IPV6_RTHDR)"); 912 #endif 913 } 914 915 /* 916 optval = 1; 917 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) 918 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 919 &optval, sizeof(optval)) == -1) 920 err(1, "IPV6_MULTICAST_LOOP"); 921 */ 922 923 /* Specify the outgoing interface and/or the source address */ 924 if (usepktinfo) 925 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo)); 926 927 if (hoplimit != -1) 928 ip6optlen += CMSG_SPACE(sizeof(int)); 929 930 /* set IP6 packet options */ 931 if (ip6optlen) { 932 if ((scmsg = (char *)malloc(ip6optlen)) == NULL) 933 errx(1, "can't allocate enough memory"); 934 smsghdr.msg_control = (caddr_t)scmsg; 935 smsghdr.msg_controllen = ip6optlen; 936 scmsgp = CMSG_FIRSTHDR(&smsghdr); 937 } 938 if (usepktinfo) { 939 cmsg_pktinfo = CMSG_DATA(scmsgp); 940 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 941 scmsgp->cmsg_level = IPPROTO_IPV6; 942 scmsgp->cmsg_type = IPV6_PKTINFO; 943 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 944 } 945 946 /* set the outgoing interface */ 947 if (ifname) { 948 #ifndef USE_SIN6_SCOPE_ID 949 /* pktinfo must have already been allocated */ 950 if ((pktinfo.ipi6_ifindex = if_nametoindex(ifname)) == 0) 951 errx(1, "%s: invalid interface name", ifname); 952 #else 953 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0) 954 errx(1, "%s: invalid interface name", ifname); 955 #endif 956 } 957 if (hoplimit != -1) { 958 scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); 959 scmsgp->cmsg_level = IPPROTO_IPV6; 960 scmsgp->cmsg_type = IPV6_HOPLIMIT; 961 memcpy(CMSG_DATA(scmsgp), &hoplimit, sizeof(hoplimit)); 962 963 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 964 } 965 966 if (tclass != -1) { 967 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_TCLASS, 968 &tclass, sizeof(tclass)) == -1) 969 err(1, "setsockopt(IPV6_TCLASS)"); 970 } 971 972 if (pcp != -2) { 973 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_VLAN_PCP, 974 &pcp, sizeof(pcp)) == -1) 975 err(1, "setsockopt(IPV6_VLAN_PCP)"); 976 } 977 978 if (argc > 1) { /* some intermediate addrs are specified */ 979 int hops; 980 int rthdrlen; 981 982 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1); 983 scmsgp->cmsg_len = CMSG_LEN(rthdrlen); 984 scmsgp->cmsg_level = IPPROTO_IPV6; 985 scmsgp->cmsg_type = IPV6_RTHDR; 986 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp); 987 rthdr = inet6_rth_init((void *)rthdr, rthdrlen, 988 IPV6_RTHDR_TYPE_0, argc - 1); 989 if (rthdr == NULL) 990 errx(1, "can't initialize rthdr"); 991 992 for (hops = 0; hops < argc - 1; hops++) { 993 memset(&hints, 0, sizeof(hints)); 994 hints.ai_family = AF_INET6; 995 996 if ((error = cap_getaddrinfo(capdns, argv[hops], NULL, &hints, 997 &res))) 998 errx(1, "%s", gai_strerror(error)); 999 if (res->ai_addr->sa_family != AF_INET6) 1000 errx(1, 1001 "bad addr family of an intermediate addr"); 1002 sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr; 1003 if (inet6_rth_add(rthdr, &sin6->sin6_addr)) 1004 errx(1, "can't add an intermediate node"); 1005 freeaddrinfo(res); 1006 } 1007 1008 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); 1009 } 1010 1011 /* From now on we will use only reverse DNS lookups. */ 1012 #ifdef WITH_CASPER 1013 if (capdns != NULL) { 1014 const char *types[1]; 1015 1016 types[0] = "ADDR2NAME"; 1017 if (cap_dns_type_limit(capdns, types, nitems(types)) < 0) 1018 err(1, "unable to limit access to system.dns service"); 1019 } 1020 #endif 1021 if (!(options & F_SRCADDR)) { 1022 /* 1023 * get the source address. XXX since we revoked the root 1024 * privilege, we cannot use a raw socket for this. 1025 */ 1026 int dummy; 1027 socklen_t len = sizeof(src); 1028 1029 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1030 err(1, "UDP socket"); 1031 1032 src.sin6_family = AF_INET6; 1033 src.sin6_addr = dst.sin6_addr; 1034 src.sin6_port = ntohs(DUMMY_PORT); 1035 src.sin6_scope_id = dst.sin6_scope_id; 1036 1037 if (usepktinfo && 1038 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, 1039 (void *)&pktinfo, sizeof(pktinfo))) 1040 err(1, "UDP setsockopt(IPV6_PKTINFO)"); 1041 1042 if (hoplimit != -1 && 1043 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 1044 (void *)&hoplimit, sizeof(hoplimit))) 1045 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); 1046 1047 if (hoplimit != -1 && 1048 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 1049 (void *)&hoplimit, sizeof(hoplimit))) 1050 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); 1051 1052 if (rthdr && 1053 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR, 1054 (void *)rthdr, (rthdr->ip6r_len + 1) << 3)) 1055 err(1, "UDP setsockopt(IPV6_RTHDR)"); 1056 1057 if (connect(dummy, (struct sockaddr *)&src, len) < 0) 1058 err(1, "UDP connect"); 1059 1060 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) 1061 err(1, "getsockname"); 1062 1063 close(dummy); 1064 } 1065 1066 /* Save pktinfo in the ancillary data. */ 1067 if (usepktinfo) 1068 memcpy(cmsg_pktinfo, &pktinfo, sizeof(pktinfo)); 1069 1070 if (connect(ssend, (struct sockaddr *)&dst, sizeof(dst)) != 0) 1071 err(1, "connect() ssend"); 1072 1073 caph_cache_catpages(); 1074 if (caph_enter_casper() < 0) 1075 err(1, "caph_enter_casper"); 1076 1077 cap_rights_init(&rights_stdin); 1078 if (caph_rights_limit(STDIN_FILENO, &rights_stdin) < 0) 1079 err(1, "caph_rights_limit stdin"); 1080 if (caph_limit_stdout() < 0) 1081 err(1, "caph_limit_stdout"); 1082 if (caph_limit_stderr() < 0) 1083 err(1, "caph_limit_stderr"); 1084 1085 cap_rights_init(&rights_srecv, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 1086 if (caph_rights_limit(srecv, &rights_srecv) < 0) 1087 err(1, "caph_rights_limit srecv"); 1088 cap_rights_init(&rights_ssend, CAP_SEND, CAP_SETSOCKOPT); 1089 if (caph_rights_limit(ssend, &rights_ssend) < 0) 1090 err(1, "caph_rights_limit ssend"); 1091 1092 #if defined(SO_SNDBUF) && defined(SO_RCVBUF) 1093 if (sockbufsize) { 1094 if (datalen > (size_t)sockbufsize) 1095 warnx("you need -b to increase socket buffer size"); 1096 if (setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, &sockbufsize, 1097 sizeof(sockbufsize)) < 0) 1098 err(1, "setsockopt(SO_SNDBUF)"); 1099 if (setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, &sockbufsize, 1100 sizeof(sockbufsize)) < 0) 1101 err(1, "setsockopt(SO_RCVBUF)"); 1102 } 1103 else { 1104 if (datalen > 8 * 1024) /*XXX*/ 1105 warnx("you need -b to increase socket buffer size"); 1106 /* 1107 * When pinging the broadcast address, you can get a lot of 1108 * answers. Doing something so evil is useful if you are trying 1109 * to stress the ethernet, or just want to fill the arp cache 1110 * to get some stuff for /etc/ethers. 1111 */ 1112 hold = 48 * 1024; 1113 setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 1114 sizeof(hold)); 1115 } 1116 #endif 1117 1118 optval = 1; 1119 #ifndef USE_SIN6_SCOPE_ID 1120 #ifdef IPV6_RECVPKTINFO 1121 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 1122 sizeof(optval)) < 0) 1123 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ 1124 #else /* old adv. API */ 1125 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_PKTINFO, &optval, 1126 sizeof(optval)) < 0) 1127 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */ 1128 #endif 1129 #endif /* USE_SIN6_SCOPE_ID */ 1130 #ifdef IPV6_RECVHOPLIMIT 1131 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, 1132 sizeof(optval)) < 0) 1133 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ 1134 #else /* old adv. API */ 1135 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, 1136 sizeof(optval)) < 0) 1137 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */ 1138 #endif 1139 1140 cap_rights_clear(&rights_srecv, CAP_SETSOCKOPT); 1141 if (caph_rights_limit(srecv, &rights_srecv) < 0) 1142 err(1, "caph_rights_limit srecv setsockopt"); 1143 cap_rights_clear(&rights_ssend, CAP_SETSOCKOPT); 1144 if (caph_rights_limit(ssend, &rights_ssend) < 0) 1145 err(1, "caph_rights_limit ssend setsockopt"); 1146 1147 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()), 1148 (unsigned long)(pingerlen() - 8)); 1149 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); 1150 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); 1151 1152 if (preload == 0) 1153 pinger(); 1154 else { 1155 if (npackets != 0 && preload > npackets) 1156 preload = npackets; 1157 while (preload--) 1158 pinger(); 1159 } 1160 clock_gettime(CLOCK_MONOTONIC, &last); 1161 1162 sigemptyset(&si_sa.sa_mask); 1163 si_sa.sa_flags = 0; 1164 si_sa.sa_handler = onsignal; 1165 if (sigaction(SIGINT, &si_sa, 0) == -1) 1166 err(EX_OSERR, "sigaction SIGINT"); 1167 seenint = 0; 1168 #ifdef SIGINFO 1169 if (sigaction(SIGINFO, &si_sa, 0) == -1) 1170 err(EX_OSERR, "sigaction SIGINFO"); 1171 seeninfo = 0; 1172 #endif 1173 if (alarmtimeout > 0) { 1174 if (sigaction(SIGALRM, &si_sa, 0) == -1) 1175 err(EX_OSERR, "sigaction SIGALRM"); 1176 } 1177 if (options & F_FLOOD) { 1178 intvl.tv_sec = 0; 1179 intvl.tv_nsec = 10000000; 1180 } 1181 1182 almost_done = 0; 1183 while (seenint == 0) { 1184 struct timespec now, timeout; 1185 struct msghdr m; 1186 struct iovec iov[2]; 1187 fd_set rfds; 1188 int n; 1189 1190 /* signal handling */ 1191 if (seenint) 1192 onint(SIGINT); 1193 #ifdef SIGINFO 1194 if (seeninfo) { 1195 summary(); 1196 seeninfo = 0; 1197 continue; 1198 } 1199 #endif 1200 FD_ZERO(&rfds); 1201 FD_SET(srecv, &rfds); 1202 clock_gettime(CLOCK_MONOTONIC, &now); 1203 timespecadd(&last, &intvl, &timeout); 1204 timespecsub(&timeout, &now, &timeout); 1205 if (timeout.tv_sec < 0) 1206 timespecclear(&timeout); 1207 1208 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 1209 if (n < 0) 1210 continue; /* EINTR */ 1211 if (n == 1) { 1212 m.msg_name = (caddr_t)&from; 1213 m.msg_namelen = sizeof(from); 1214 memset(&iov, 0, sizeof(iov)); 1215 iov[0].iov_base = (caddr_t)packet; 1216 iov[0].iov_len = packlen; 1217 m.msg_iov = iov; 1218 m.msg_iovlen = 1; 1219 memset(cm, 0, CONTROLLEN); 1220 m.msg_control = (void *)cm; 1221 m.msg_controllen = CONTROLLEN; 1222 1223 cc = recvmsg(srecv, &m, 0); 1224 if (cc < 0) { 1225 if (errno != EINTR) { 1226 warn("recvmsg"); 1227 sleep(1); 1228 } 1229 continue; 1230 } else if (cc == 0) { 1231 int mtu; 1232 1233 /* 1234 * receive control messages only. Process the 1235 * exceptions (currently the only possibility is 1236 * a path MTU notification.) 1237 */ 1238 if ((mtu = get_pathmtu(&m)) > 0) { 1239 if ((options & F_VERBOSE) != 0) { 1240 printf("new path MTU (%d) is " 1241 "notified\n", mtu); 1242 } 1243 } 1244 continue; 1245 } else { 1246 /* 1247 * an ICMPv6 message (probably an echoreply) 1248 * arrived. 1249 */ 1250 pr_pack(packet, cc, &m); 1251 } 1252 if (((options & F_ONCE) != 0 && nreceived > 0) || 1253 (npackets > 0 && nreceived >= npackets)) 1254 break; 1255 } 1256 if (n == 0 || (options & F_FLOOD)) { 1257 if (npackets == 0 || ntransmitted < npackets) 1258 pinger(); 1259 else { 1260 if (almost_done) 1261 break; 1262 almost_done = 1; 1263 /* 1264 * If we're not transmitting any more packets, 1265 * change the timer to wait two round-trip times 1266 * if we've received any packets or (waittime) 1267 * milliseconds if we haven't. 1268 */ 1269 intvl.tv_nsec = 0; 1270 if (nreceived) { 1271 intvl.tv_sec = 2 * tmax / 1000; 1272 if (intvl.tv_sec == 0) 1273 intvl.tv_sec = 1; 1274 } else { 1275 intvl.tv_sec = waittime / 1000; 1276 intvl.tv_nsec = 1277 waittime % 1000 * 1000000; 1278 } 1279 } 1280 clock_gettime(CLOCK_MONOTONIC, &last); 1281 if (ntransmitted - nreceived - 1 > nmissedmax) { 1282 nmissedmax = ntransmitted - nreceived - 1; 1283 if (options & F_MISSED) 1284 (void)write(STDOUT_FILENO, &BBELL, 1); 1285 } 1286 } 1287 } 1288 sigemptyset(&si_sa.sa_mask); 1289 si_sa.sa_flags = 0; 1290 si_sa.sa_handler = SIG_IGN; 1291 sigaction(SIGINT, &si_sa, 0); 1292 sigaction(SIGALRM, &si_sa, 0); 1293 summary(); 1294 1295 if(packet != NULL) 1296 free(packet); 1297 1298 if (nreceived > 0) 1299 exit(0); 1300 else if (ntransmitted > ntransmitfailures) 1301 exit(2); 1302 else 1303 exit(EX_OSERR); 1304 } 1305 1306 static void 1307 onsignal(int sig) 1308 { 1309 1310 switch (sig) { 1311 case SIGINT: 1312 case SIGALRM: 1313 seenint++; 1314 break; 1315 #ifdef SIGINFO 1316 case SIGINFO: 1317 seeninfo++; 1318 break; 1319 #endif 1320 } 1321 } 1322 1323 /* 1324 * pinger -- 1325 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1326 * will be added on by the kernel. The ID field is our UNIX process ID, 1327 * and the sequence number is an ascending integer. The first 8 bytes 1328 * of the data portion are used to hold a UNIX "timespec" struct in VAX 1329 * byte-order, to compute the round-trip time. 1330 */ 1331 static size_t 1332 pingerlen(void) 1333 { 1334 size_t l; 1335 1336 if (options & F_FQDN) 1337 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1338 else if (options & F_FQDNOLD) 1339 l = ICMP6_NIQLEN; 1340 else if (options & F_NODEADDR) 1341 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1342 else if (options & F_SUPTYPES) 1343 l = ICMP6_NIQLEN; 1344 else 1345 l = ICMP6ECHOLEN + datalen; 1346 1347 return l; 1348 } 1349 1350 static int 1351 pinger(void) 1352 { 1353 struct icmp6_hdr *icp; 1354 struct iovec iov[2]; 1355 int i, cc; 1356 struct icmp6_nodeinfo *nip; 1357 uint16_t seq; 1358 1359 if (npackets && ntransmitted >= npackets) 1360 return(-1); /* no more transmission */ 1361 1362 icp = (struct icmp6_hdr *)outpack; 1363 nip = (struct icmp6_nodeinfo *)outpack; 1364 memset(icp, 0, sizeof(*icp)); 1365 icp->icmp6_cksum = 0; 1366 seq = ntransmitted++; 1367 CLR(seq % mx_dup_ck); 1368 1369 if (options & F_FQDN) { 1370 uint16_t s; 1371 1372 icp->icmp6_type = ICMP6_NI_QUERY; 1373 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1374 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1375 nip->ni_flags = htons(0); 1376 1377 memcpy(nip->icmp6_ni_nonce, nonce, 1378 sizeof(nip->icmp6_ni_nonce)); 1379 s = htons(seq); 1380 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1381 1382 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1383 sizeof(dst.sin6_addr)); 1384 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1385 datalen = 0; 1386 } else if (options & F_FQDNOLD) { 1387 uint16_t s; 1388 /* packet format in 03 draft - no Subject data on queries */ 1389 icp->icmp6_type = ICMP6_NI_QUERY; 1390 icp->icmp6_code = 0; /* code field is always 0 */ 1391 nip->ni_qtype = htons(NI_QTYPE_FQDN); 1392 nip->ni_flags = htons(0); 1393 1394 memcpy(nip->icmp6_ni_nonce, nonce, 1395 sizeof(nip->icmp6_ni_nonce)); 1396 s = htons(seq); 1397 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1398 1399 cc = ICMP6_NIQLEN; 1400 datalen = 0; 1401 } else if (options & F_NODEADDR) { 1402 uint16_t s; 1403 1404 icp->icmp6_type = ICMP6_NI_QUERY; 1405 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6; 1406 nip->ni_qtype = htons(NI_QTYPE_NODEADDR); 1407 nip->ni_flags = naflags; 1408 1409 memcpy(nip->icmp6_ni_nonce, nonce, 1410 sizeof(nip->icmp6_ni_nonce)); 1411 s = htons(seq); 1412 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1413 1414 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr, 1415 sizeof(dst.sin6_addr)); 1416 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr); 1417 datalen = 0; 1418 } else if (options & F_SUPTYPES) { 1419 uint16_t s; 1420 1421 icp->icmp6_type = ICMP6_NI_QUERY; 1422 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/ 1423 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES); 1424 /* we support compressed bitmap */ 1425 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS; 1426 1427 memcpy(nip->icmp6_ni_nonce, nonce, 1428 sizeof(nip->icmp6_ni_nonce)); 1429 s = htons(seq); 1430 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s)); 1431 1432 cc = ICMP6_NIQLEN; 1433 datalen = 0; 1434 } else { 1435 icp->icmp6_type = ICMP6_ECHO_REQUEST; 1436 icp->icmp6_code = 0; 1437 icp->icmp6_id = htons(ident); 1438 icp->icmp6_seq = htons(seq); 1439 if (timing) { 1440 struct timespec tv; 1441 struct tv32 tv32; 1442 (void)clock_gettime(CLOCK_MONOTONIC, &tv); 1443 /* 1444 * Truncate seconds down to 32 bits in order 1445 * to fit the timestamp within 8 bytes of the 1446 * packet. We're only concerned with 1447 * durations, not absolute times. 1448 */ 1449 tv32.tv32_sec = (uint32_t)htonl(tv.tv_sec); 1450 tv32.tv32_nsec = (uint32_t)htonl(tv.tv_nsec); 1451 memcpy(&outpack[ICMP6ECHOLEN], &tv32, sizeof(tv32)); 1452 } 1453 cc = ICMP6ECHOLEN + datalen; 1454 } 1455 1456 #ifdef DIAGNOSTIC 1457 if (pingerlen() != cc) 1458 errx(1, "internal error; length mismatch"); 1459 #endif 1460 1461 memset(&iov, 0, sizeof(iov)); 1462 iov[0].iov_base = (caddr_t)outpack; 1463 iov[0].iov_len = cc; 1464 smsghdr.msg_iov = iov; 1465 smsghdr.msg_iovlen = 1; 1466 1467 i = sendmsg(ssend, &smsghdr, 0); 1468 1469 if (i < 0 || i != cc) { 1470 if (i < 0) { 1471 ntransmitfailures++; 1472 warn("sendmsg"); 1473 } 1474 (void)printf("ping6: wrote %s %d chars, ret=%d\n", 1475 hostname, cc, i); 1476 } 1477 if (!(options & F_QUIET) && options & F_DOT) 1478 (void)write(STDOUT_FILENO, &DOT[DOTidx++ % DOTlen], 1); 1479 1480 return(0); 1481 } 1482 1483 static int 1484 myechoreply(const struct icmp6_hdr *icp) 1485 { 1486 if (ntohs(icp->icmp6_id) == ident) 1487 return 1; 1488 else 1489 return 0; 1490 } 1491 1492 static int 1493 mynireply(const struct icmp6_nodeinfo *nip) 1494 { 1495 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t), 1496 nonce + sizeof(u_int16_t), 1497 sizeof(nonce) - sizeof(u_int16_t)) == 0) 1498 return 1; 1499 else 1500 return 0; 1501 } 1502 1503 /* 1504 * Decode a name from a DNS message. 1505 * 1506 * Format of the message is described in RFC 1035 subsection 4.1.4. 1507 * 1508 * Arguments: 1509 * sp - Pointer to a DNS pointer octet or to the first octet of a label 1510 * in the message. 1511 * ep - Pointer to the end of the message (one step past the last octet). 1512 * base - Pointer to the beginning of the message. 1513 * buf - Buffer into which the decoded name will be saved. 1514 * bufsiz - Size of the buffer 'buf'. 1515 * 1516 * Return value: 1517 * Pointer to an octet immediately following the ending zero octet 1518 * of the decoded label, or NULL if an error occurred. 1519 */ 1520 static const char * 1521 dnsdecode(const u_char *sp, const u_char *ep, const u_char *base, char *buf, 1522 size_t bufsiz) 1523 { 1524 int i; 1525 const u_char *cp; 1526 char cresult[MAXDNAME + 1]; 1527 const u_char *comp; 1528 int l; 1529 1530 cp = sp; 1531 *buf = '\0'; 1532 1533 if (cp >= ep) 1534 return NULL; 1535 while (cp < ep) { 1536 i = *cp; 1537 if (i == 0 || cp != sp) { 1538 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz) 1539 return NULL; /*result overrun*/ 1540 } 1541 if (i == 0) 1542 break; 1543 cp++; 1544 1545 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) { 1546 /* DNS compression */ 1547 if (!base) 1548 return NULL; 1549 1550 comp = base + (i & 0x3f); 1551 if (dnsdecode(comp, cp, base, cresult, 1552 sizeof(cresult)) == NULL) 1553 return NULL; 1554 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1555 return NULL; /*result overrun*/ 1556 break; 1557 } else if ((i & 0x3f) == i) { 1558 if (i > ep - cp) 1559 return NULL; /*source overrun*/ 1560 while (i-- > 0 && cp < ep) { 1561 l = snprintf(cresult, sizeof(cresult), 1562 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff); 1563 if ((size_t)l >= sizeof(cresult) || l < 0) 1564 return NULL; 1565 if (strlcat(buf, cresult, bufsiz) >= bufsiz) 1566 return NULL; /*result overrun*/ 1567 cp++; 1568 } 1569 } else 1570 return NULL; /*invalid label*/ 1571 } 1572 if (i != 0) 1573 return NULL; /*not terminated*/ 1574 cp++; 1575 return cp; 1576 } 1577 1578 /* 1579 * pr_pack -- 1580 * Print out the packet, if it came from us. This logic is necessary 1581 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1582 * which arrive ('tis only fair). This permits multiple copies of this 1583 * program to be run without having intermingled output (or statistics!). 1584 */ 1585 static void 1586 pr_pack(u_char *buf, int cc, struct msghdr *mhdr) 1587 { 1588 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) 1589 struct icmp6_hdr *icp; 1590 struct icmp6_nodeinfo *ni; 1591 int i; 1592 int hoplim; 1593 struct sockaddr *from; 1594 int fromlen; 1595 const u_char *cp = NULL; 1596 u_char *dp, *end = buf + cc; 1597 struct in6_pktinfo *pktinfo = NULL; 1598 struct timespec tv, tp; 1599 struct tv32 tpp; 1600 double triptime = 0; 1601 int dupflag; 1602 size_t off; 1603 int oldfqdn; 1604 u_int16_t seq; 1605 char dnsname[MAXDNAME + 1]; 1606 1607 (void)clock_gettime(CLOCK_MONOTONIC, &tv); 1608 1609 if (!mhdr || !mhdr->msg_name || 1610 mhdr->msg_namelen != sizeof(struct sockaddr_in6) || 1611 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { 1612 if (options & F_VERBOSE) 1613 warnx("invalid peername"); 1614 return; 1615 } 1616 from = (struct sockaddr *)mhdr->msg_name; 1617 fromlen = mhdr->msg_namelen; 1618 if (cc < (int)sizeof(struct icmp6_hdr)) { 1619 if (options & F_VERBOSE) 1620 warnx("packet too short (%d bytes) from %s", cc, 1621 pr_addr(from, fromlen)); 1622 return; 1623 } 1624 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) && 1625 (options & F_VERBOSE) != 0) 1626 warnx("some control data discarded, insufficient buffer size"); 1627 icp = (struct icmp6_hdr *)buf; 1628 ni = (struct icmp6_nodeinfo *)buf; 1629 off = 0; 1630 1631 if ((hoplim = get_hoplim(mhdr)) == -1) { 1632 warnx("failed to get receiving hop limit"); 1633 return; 1634 } 1635 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { 1636 warnx("failed to get receiving packet information"); 1637 return; 1638 } 1639 1640 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { 1641 seq = ntohs(icp->icmp6_seq); 1642 ++nreceived; 1643 if (timing) { 1644 memcpy(&tpp, icp + 1, sizeof(tpp)); 1645 tp.tv_sec = ntohl(tpp.tv32_sec); 1646 tp.tv_nsec = ntohl(tpp.tv32_nsec); 1647 timespecsub(&tv, &tp, &tv); 1648 triptime = ((double)tv.tv_sec) * 1000.0 + 1649 ((double)tv.tv_nsec) / 1000000.0; 1650 tsum += triptime; 1651 tsumsq += triptime * triptime; 1652 if (triptime < tmin) 1653 tmin = triptime; 1654 if (triptime > tmax) 1655 tmax = triptime; 1656 } 1657 1658 if (TST(seq % mx_dup_ck)) { 1659 ++nrepeats; 1660 --nreceived; 1661 dupflag = 1; 1662 } else { 1663 SET(seq % mx_dup_ck); 1664 dupflag = 0; 1665 } 1666 1667 if (options & F_QUIET) 1668 return; 1669 1670 if (options & F_WAITTIME && triptime > waittime) { 1671 ++nrcvtimeout; 1672 return; 1673 } 1674 1675 if (options & F_DOT) 1676 (void)write(STDOUT_FILENO, &BSPACE, 1); 1677 else { 1678 if (options & F_AUDIBLE) 1679 (void)write(STDOUT_FILENO, &BBELL, 1); 1680 (void)printf("%d bytes from %s, icmp_seq=%u", cc, 1681 pr_addr(from, fromlen), seq); 1682 (void)printf(" hlim=%d", hoplim); 1683 if ((options & F_VERBOSE) != 0) { 1684 struct sockaddr_in6 dstsa; 1685 1686 memset(&dstsa, 0, sizeof(dstsa)); 1687 dstsa.sin6_family = AF_INET6; 1688 dstsa.sin6_len = sizeof(dstsa); 1689 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; 1690 dstsa.sin6_addr = pktinfo->ipi6_addr; 1691 (void)printf(" dst=%s", 1692 pr_addr((struct sockaddr *)&dstsa, 1693 sizeof(dstsa))); 1694 } 1695 if (timing) 1696 (void)printf(" time=%.3f ms", triptime); 1697 if (dupflag) 1698 (void)printf("(DUP!)"); 1699 /* check the data */ 1700 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1701 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; 1702 for (i = 8; cp < end; ++i, ++cp, ++dp) { 1703 if (*cp != *dp) { 1704 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); 1705 break; 1706 } 1707 } 1708 } 1709 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) { 1710 memcpy(&seq, ni->icmp6_ni_nonce, sizeof(seq)); 1711 seq = ntohs(seq); 1712 ++nreceived; 1713 if (TST(seq % mx_dup_ck)) { 1714 ++nrepeats; 1715 --nreceived; 1716 dupflag = 1; 1717 } else { 1718 SET(seq % mx_dup_ck); 1719 dupflag = 0; 1720 } 1721 1722 if (options & F_QUIET) 1723 return; 1724 1725 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1726 1727 switch (ntohs(ni->ni_code)) { 1728 case ICMP6_NI_SUCCESS: 1729 break; 1730 case ICMP6_NI_REFUSED: 1731 printf("refused, type 0x%x", ntohs(ni->ni_type)); 1732 goto fqdnend; 1733 case ICMP6_NI_UNKNOWN: 1734 printf("unknown, type 0x%x", ntohs(ni->ni_type)); 1735 goto fqdnend; 1736 default: 1737 printf("unknown code 0x%x, type 0x%x", 1738 ntohs(ni->ni_code), ntohs(ni->ni_type)); 1739 goto fqdnend; 1740 } 1741 1742 switch (ntohs(ni->ni_qtype)) { 1743 case NI_QTYPE_NOOP: 1744 printf("NodeInfo NOOP"); 1745 break; 1746 case NI_QTYPE_SUPTYPES: 1747 pr_suptypes(ni, end - (u_char *)ni); 1748 break; 1749 case NI_QTYPE_NODEADDR: 1750 pr_nodeaddr(ni, end - (u_char *)ni); 1751 break; 1752 case NI_QTYPE_FQDN: 1753 default: /* XXX: for backward compatibility */ 1754 cp = (u_char *)ni + ICMP6_NIRLEN; 1755 if (buf[off + ICMP6_NIRLEN] == 1756 cc - off - ICMP6_NIRLEN - 1) 1757 oldfqdn = 1; 1758 else 1759 oldfqdn = 0; 1760 if (oldfqdn) { 1761 cp++; /* skip length */ 1762 while (cp < end) { 1763 safeputc(*cp & 0xff); 1764 cp++; 1765 } 1766 } else { 1767 i = 0; 1768 while (cp < end) { 1769 cp = dnsdecode((const u_char *)cp, end, 1770 (const u_char *)(ni + 1), dnsname, 1771 sizeof(dnsname)); 1772 if (cp == NULL) { 1773 printf("???"); 1774 break; 1775 } 1776 /* 1777 * name-lookup special handling for 1778 * truncated name 1779 */ 1780 if (cp + 1 <= end && !*cp && 1781 strlen(dnsname) > 0) { 1782 dnsname[strlen(dnsname) - 1] = '\0'; 1783 cp++; 1784 } 1785 printf("%s%s", i > 0 ? "," : "", 1786 dnsname); 1787 } 1788 } 1789 if (options & F_VERBOSE) { 1790 u_long t; 1791 int32_t ttl; 1792 int comma = 0; 1793 1794 (void)printf(" ("); /*)*/ 1795 1796 switch (ni->ni_code) { 1797 case ICMP6_NI_REFUSED: 1798 (void)printf("refused"); 1799 comma++; 1800 break; 1801 case ICMP6_NI_UNKNOWN: 1802 (void)printf("unknown qtype"); 1803 comma++; 1804 break; 1805 } 1806 1807 if ((end - (u_char *)ni) < ICMP6_NIRLEN) { 1808 /* case of refusion, unknown */ 1809 /*(*/ 1810 putchar(')'); 1811 goto fqdnend; 1812 } 1813 memcpy(&t, &buf[off+ICMP6ECHOLEN+8], sizeof(t)); 1814 ttl = (int32_t)ntohl(t); 1815 if (comma) 1816 printf(","); 1817 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) { 1818 (void)printf("TTL=%d:meaningless", 1819 (int)ttl); 1820 } else { 1821 if (ttl < 0) { 1822 (void)printf("TTL=%d:invalid", 1823 ttl); 1824 } else 1825 (void)printf("TTL=%d", ttl); 1826 } 1827 comma++; 1828 1829 if (oldfqdn) { 1830 if (comma) 1831 printf(","); 1832 printf("03 draft"); 1833 comma++; 1834 } else { 1835 cp = (u_char *)ni + ICMP6_NIRLEN; 1836 if (cp == end) { 1837 if (comma) 1838 printf(","); 1839 printf("no name"); 1840 comma++; 1841 } 1842 } 1843 1844 if (buf[off + ICMP6_NIRLEN] != 1845 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) { 1846 if (comma) 1847 printf(","); 1848 (void)printf("invalid namelen:%d/%lu", 1849 buf[off + ICMP6_NIRLEN], 1850 (u_long)cc - off - ICMP6_NIRLEN - 1); 1851 comma++; 1852 } 1853 /*(*/ 1854 putchar(')'); 1855 } 1856 fqdnend: 1857 ; 1858 } 1859 } else { 1860 /* We've got something other than an ECHOREPLY */ 1861 if (!(options & F_VERBOSE)) 1862 return; 1863 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); 1864 pr_icmph(icp, end); 1865 } 1866 1867 if (!(options & F_DOT)) { 1868 (void)putchar('\n'); 1869 if (options & F_VERBOSE) 1870 pr_exthdrs(mhdr); 1871 (void)fflush(stdout); 1872 } 1873 #undef safeputc 1874 } 1875 1876 static void 1877 pr_exthdrs(struct msghdr *mhdr) 1878 { 1879 ssize_t bufsize; 1880 void *bufp; 1881 struct cmsghdr *cm; 1882 1883 bufsize = 0; 1884 bufp = mhdr->msg_control; 1885 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 1886 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 1887 if (cm->cmsg_level != IPPROTO_IPV6) 1888 continue; 1889 1890 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp); 1891 if (bufsize <= 0) 1892 continue; 1893 switch (cm->cmsg_type) { 1894 case IPV6_HOPOPTS: 1895 printf(" HbH Options: "); 1896 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1897 break; 1898 case IPV6_DSTOPTS: 1899 #ifdef IPV6_RTHDRDSTOPTS 1900 case IPV6_RTHDRDSTOPTS: 1901 #endif 1902 printf(" Dst Options: "); 1903 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize); 1904 break; 1905 case IPV6_RTHDR: 1906 printf(" Routing: "); 1907 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize); 1908 break; 1909 } 1910 } 1911 } 1912 1913 static void 1914 pr_ip6opt(void *extbuf, size_t bufsize) 1915 { 1916 struct ip6_hbh *ext; 1917 int currentlen; 1918 u_int8_t type; 1919 socklen_t extlen, len; 1920 void *databuf; 1921 size_t offset; 1922 u_int16_t value2; 1923 u_int32_t value4; 1924 1925 ext = (struct ip6_hbh *)extbuf; 1926 extlen = (ext->ip6h_len + 1) * 8; 1927 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, 1928 (unsigned int)ext->ip6h_len, (unsigned long)extlen); 1929 1930 /* 1931 * Bounds checking on the ancillary data buffer: 1932 * subtract the size of a cmsg structure from the buffer size. 1933 */ 1934 if (bufsize < (extlen + CMSG_SPACE(0))) { 1935 extlen = bufsize - CMSG_SPACE(0); 1936 warnx("options truncated, showing only %u (total=%u)", 1937 (unsigned int)(extlen / 8 - 1), 1938 (unsigned int)(ext->ip6h_len)); 1939 } 1940 1941 currentlen = 0; 1942 while (1) { 1943 currentlen = inet6_opt_next(extbuf, extlen, currentlen, 1944 &type, &len, &databuf); 1945 if (currentlen == -1) 1946 break; 1947 switch (type) { 1948 /* 1949 * Note that inet6_opt_next automatically skips any padding 1950 * optins. 1951 */ 1952 case IP6OPT_JUMBO: 1953 offset = 0; 1954 offset = inet6_opt_get_val(databuf, offset, 1955 &value4, sizeof(value4)); 1956 printf(" Jumbo Payload Opt: Length %u\n", 1957 (u_int32_t)ntohl(value4)); 1958 break; 1959 case IP6OPT_ROUTER_ALERT: 1960 offset = 0; 1961 offset = inet6_opt_get_val(databuf, offset, 1962 &value2, sizeof(value2)); 1963 printf(" Router Alert Opt: Type %u\n", 1964 ntohs(value2)); 1965 break; 1966 default: 1967 printf(" Received Opt %u len %lu\n", 1968 type, (unsigned long)len); 1969 break; 1970 } 1971 } 1972 return; 1973 } 1974 1975 static void 1976 pr_rthdr(void *extbuf, size_t bufsize) 1977 { 1978 struct in6_addr *in6; 1979 char ntopbuf[INET6_ADDRSTRLEN]; 1980 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; 1981 int i, segments, origsegs, rthsize, size0, size1; 1982 1983 /* print fixed part of the header */ 1984 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, 1985 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); 1986 if ((segments = inet6_rth_segments(extbuf)) >= 0) { 1987 printf("%d segments, ", segments); 1988 printf("%d left\n", rh->ip6r_segleft); 1989 } else { 1990 printf("segments unknown, "); 1991 printf("%d left\n", rh->ip6r_segleft); 1992 return; 1993 } 1994 1995 /* 1996 * Bounds checking on the ancillary data buffer. When calculating 1997 * the number of items to show keep in mind: 1998 * - The size of the cmsg structure 1999 * - The size of one segment (the size of a Type 0 routing header) 2000 * - When dividing add a fudge factor of one in case the 2001 * dividend is not evenly divisible by the divisor 2002 */ 2003 rthsize = (rh->ip6r_len + 1) * 8; 2004 if (bufsize < (rthsize + CMSG_SPACE(0))) { 2005 origsegs = segments; 2006 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0); 2007 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1); 2008 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) / 2009 (size1 - size0) + 1; 2010 warnx("segments truncated, showing only %d (total=%d)", 2011 segments, origsegs); 2012 } 2013 2014 for (i = 0; i < segments; i++) { 2015 in6 = inet6_rth_getaddr(extbuf, i); 2016 if (in6 == NULL) 2017 printf(" [%d]<NULL>\n", i); 2018 else { 2019 if (!inet_ntop(AF_INET6, in6, ntopbuf, 2020 sizeof(ntopbuf))) 2021 strlcpy(ntopbuf, "?", sizeof(ntopbuf)); 2022 printf(" [%d]%s\n", i, ntopbuf); 2023 } 2024 } 2025 2026 return; 2027 2028 } 2029 2030 static int 2031 pr_bitrange(u_int32_t v, int soff, int ii) 2032 { 2033 int off; 2034 int i; 2035 2036 off = 0; 2037 while (off < 32) { 2038 /* shift till we have 0x01 */ 2039 if ((v & 0x01) == 0) { 2040 if (ii > 1) 2041 printf("-%u", soff + off - 1); 2042 ii = 0; 2043 switch (v & 0x0f) { 2044 case 0x00: 2045 v >>= 4; 2046 off += 4; 2047 continue; 2048 case 0x08: 2049 v >>= 3; 2050 off += 3; 2051 continue; 2052 case 0x04: case 0x0c: 2053 v >>= 2; 2054 off += 2; 2055 continue; 2056 default: 2057 v >>= 1; 2058 off += 1; 2059 continue; 2060 } 2061 } 2062 2063 /* we have 0x01 with us */ 2064 for (i = 0; i < 32 - off; i++) { 2065 if ((v & (0x01 << i)) == 0) 2066 break; 2067 } 2068 if (!ii) 2069 printf(" %u", soff + off); 2070 ii += i; 2071 v >>= i; off += i; 2072 } 2073 return ii; 2074 } 2075 2076 static void 2077 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen) 2078 /* ni->qtype must be SUPTYPES */ 2079 { 2080 size_t clen; 2081 u_int32_t v; 2082 const u_char *cp, *end; 2083 u_int16_t cur; 2084 struct cbit { 2085 u_int16_t words; /*32bit count*/ 2086 u_int16_t skip; 2087 } cbit; 2088 #define MAXQTYPES (1 << 16) 2089 size_t off; 2090 int b; 2091 2092 cp = (u_char *)(ni + 1); 2093 end = ((u_char *)ni) + nilen; 2094 cur = 0; 2095 b = 0; 2096 2097 printf("NodeInfo Supported Qtypes"); 2098 if (options & F_VERBOSE) { 2099 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) 2100 printf(", compressed bitmap"); 2101 else 2102 printf(", raw bitmap"); 2103 } 2104 2105 while (cp < end) { 2106 clen = (size_t)(end - cp); 2107 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) { 2108 if (clen == 0 || clen > MAXQTYPES / 8 || 2109 clen % sizeof(v)) { 2110 printf("???"); 2111 return; 2112 } 2113 } else { 2114 if (clen < sizeof(cbit) || clen % sizeof(v)) 2115 return; 2116 memcpy(&cbit, cp, sizeof(cbit)); 2117 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) > 2118 clen) 2119 return; 2120 cp += sizeof(cbit); 2121 clen = ntohs(cbit.words) * sizeof(v); 2122 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 > 2123 MAXQTYPES) 2124 return; 2125 } 2126 2127 for (off = 0; off < clen; off += sizeof(v)) { 2128 memcpy(&v, cp + off, sizeof(v)); 2129 v = (u_int32_t)ntohl(v); 2130 b = pr_bitrange(v, (int)(cur + off * 8), b); 2131 } 2132 /* flush the remaining bits */ 2133 b = pr_bitrange(0, (int)(cur + off * 8), b); 2134 2135 cp += clen; 2136 cur += clen * 8; 2137 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0) 2138 cur += ntohs(cbit.skip) * 32; 2139 } 2140 } 2141 2142 static void 2143 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen) 2144 /* ni->qtype must be NODEADDR */ 2145 { 2146 u_char *cp = (u_char *)(ni + 1); 2147 char ntop_buf[INET6_ADDRSTRLEN]; 2148 int withttl = 0; 2149 2150 nilen -= sizeof(struct icmp6_nodeinfo); 2151 2152 if (options & F_VERBOSE) { 2153 switch (ni->ni_code) { 2154 case ICMP6_NI_REFUSED: 2155 (void)printf("refused"); 2156 break; 2157 case ICMP6_NI_UNKNOWN: 2158 (void)printf("unknown qtype"); 2159 break; 2160 } 2161 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE) 2162 (void)printf(" truncated"); 2163 } 2164 putchar('\n'); 2165 if (nilen <= 0) 2166 printf(" no address\n"); 2167 2168 /* 2169 * In icmp-name-lookups 05 and later, TTL of each returned address 2170 * is contained in the resposne. We try to detect the version 2171 * by the length of the data, but note that the detection algorithm 2172 * is incomplete. We assume the latest draft by default. 2173 */ 2174 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0) 2175 withttl = 1; 2176 while (nilen > 0) { 2177 u_int32_t ttl = 0; 2178 2179 if (withttl) { 2180 uint32_t t; 2181 2182 memcpy(&t, cp, sizeof(t)); 2183 ttl = (u_int32_t)ntohl(t); 2184 cp += sizeof(u_int32_t); 2185 nilen -= sizeof(u_int32_t); 2186 } 2187 2188 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) == 2189 NULL) 2190 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2191 printf(" %s", ntop_buf); 2192 if (withttl) { 2193 if (ttl == 0xffffffff) { 2194 /* 2195 * XXX: can this convention be applied to all 2196 * type of TTL (i.e. non-ND TTL)? 2197 */ 2198 printf("(TTL=infty)"); 2199 } 2200 else 2201 printf("(TTL=%u)", ttl); 2202 } 2203 putchar('\n'); 2204 2205 nilen -= sizeof(struct in6_addr); 2206 cp += sizeof(struct in6_addr); 2207 } 2208 } 2209 2210 static int 2211 get_hoplim(struct msghdr *mhdr) 2212 { 2213 struct cmsghdr *cm; 2214 2215 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2216 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2217 if (cm->cmsg_len == 0) 2218 return(-1); 2219 2220 if (cm->cmsg_level == IPPROTO_IPV6 && 2221 cm->cmsg_type == IPV6_HOPLIMIT && 2222 cm->cmsg_len == CMSG_LEN(sizeof(int))) { 2223 int r; 2224 2225 memcpy(&r, CMSG_DATA(cm), sizeof(r)); 2226 return(r); 2227 } 2228 } 2229 2230 return(-1); 2231 } 2232 2233 static struct in6_pktinfo * 2234 get_rcvpktinfo(struct msghdr *mhdr) 2235 { 2236 static struct in6_pktinfo pi; 2237 struct cmsghdr *cm; 2238 2239 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2240 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2241 if (cm->cmsg_len == 0) 2242 return(NULL); 2243 2244 if (cm->cmsg_level == IPPROTO_IPV6 && 2245 cm->cmsg_type == IPV6_PKTINFO && 2246 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) { 2247 memcpy(&pi, CMSG_DATA(cm), sizeof(pi)); 2248 return(&pi); 2249 } 2250 } 2251 2252 return(NULL); 2253 } 2254 2255 static int 2256 get_pathmtu(struct msghdr *mhdr) 2257 { 2258 #ifdef IPV6_RECVPATHMTU 2259 struct cmsghdr *cm; 2260 struct ip6_mtuinfo mtuctl; 2261 2262 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; 2263 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { 2264 if (cm->cmsg_len == 0) 2265 return(0); 2266 2267 if (cm->cmsg_level == IPPROTO_IPV6 && 2268 cm->cmsg_type == IPV6_PATHMTU && 2269 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { 2270 memcpy(&mtuctl, CMSG_DATA(cm), sizeof(mtuctl)); 2271 2272 /* 2273 * If the notified destination is different from 2274 * the one we are pinging, just ignore the info. 2275 * We check the scope ID only when both notified value 2276 * and our own value have non-0 values, because we may 2277 * have used the default scope zone ID for sending, 2278 * in which case the scope ID value is 0. 2279 */ 2280 if (!IN6_ARE_ADDR_EQUAL(&mtuctl.ip6m_addr.sin6_addr, 2281 &dst.sin6_addr) || 2282 (mtuctl.ip6m_addr.sin6_scope_id && 2283 dst.sin6_scope_id && 2284 mtuctl.ip6m_addr.sin6_scope_id != 2285 dst.sin6_scope_id)) { 2286 if ((options & F_VERBOSE) != 0) { 2287 printf("path MTU for %s is notified. " 2288 "(ignored)\n", 2289 pr_addr((struct sockaddr *)&mtuctl.ip6m_addr, 2290 sizeof(mtuctl.ip6m_addr))); 2291 } 2292 return(0); 2293 } 2294 2295 /* 2296 * Ignore an invalid MTU. XXX: can we just believe 2297 * the kernel check? 2298 */ 2299 if (mtuctl.ip6m_mtu < IPV6_MMTU) 2300 return(0); 2301 2302 /* notification for our destination. return the MTU. */ 2303 return((int)mtuctl.ip6m_mtu); 2304 } 2305 } 2306 #endif 2307 return(0); 2308 } 2309 2310 /* 2311 * onint -- 2312 * SIGINT handler. 2313 */ 2314 /* ARGSUSED */ 2315 static void 2316 onint(int notused __unused) 2317 { 2318 /* 2319 * When doing reverse DNS lookups, the seenint flag might not 2320 * be noticed for a while. Just exit if we get a second SIGINT. 2321 */ 2322 if ((options & F_HOSTNAME) && seenint != 0) 2323 _exit(nreceived ? 0 : 2); 2324 } 2325 2326 /* 2327 * summary -- 2328 * Print out statistics. 2329 */ 2330 static void 2331 summary(void) 2332 { 2333 2334 (void)printf("\n--- %s ping6 statistics ---\n", hostname); 2335 (void)printf("%ld packets transmitted, ", ntransmitted); 2336 (void)printf("%ld packets received, ", nreceived); 2337 if (nrepeats) 2338 (void)printf("+%ld duplicates, ", nrepeats); 2339 if (ntransmitted) { 2340 if (nreceived > ntransmitted) 2341 (void)printf("-- somebody's duplicating packets!"); 2342 else 2343 (void)printf("%.1f%% packet loss", 2344 ((((double)ntransmitted - nreceived) * 100.0) / 2345 ntransmitted)); 2346 } 2347 if (nrcvtimeout) 2348 printf(", %ld packets out of wait time", nrcvtimeout); 2349 (void)putchar('\n'); 2350 if (nreceived && timing) { 2351 /* Only display average to microseconds */ 2352 double num = nreceived + nrepeats; 2353 double avg = tsum / num; 2354 double dev = sqrt(tsumsq / num - avg * avg); 2355 (void)printf( 2356 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", 2357 tmin, avg, tmax, dev); 2358 (void)fflush(stdout); 2359 } 2360 (void)fflush(stdout); 2361 } 2362 2363 /*subject type*/ 2364 static const char *niqcode[] = { 2365 "IPv6 address", 2366 "DNS label", /*or empty*/ 2367 "IPv4 address", 2368 }; 2369 2370 /*result code*/ 2371 static const char *nircode[] = { 2372 "Success", "Refused", "Unknown", 2373 }; 2374 2375 2376 /* 2377 * pr_icmph -- 2378 * Print a descriptive string about an ICMP header. 2379 */ 2380 static void 2381 pr_icmph(struct icmp6_hdr *icp, u_char *end) 2382 { 2383 char ntop_buf[INET6_ADDRSTRLEN]; 2384 struct nd_redirect *red; 2385 struct icmp6_nodeinfo *ni; 2386 char dnsname[MAXDNAME + 1]; 2387 const u_char *cp; 2388 size_t l; 2389 2390 switch (icp->icmp6_type) { 2391 case ICMP6_DST_UNREACH: 2392 switch (icp->icmp6_code) { 2393 case ICMP6_DST_UNREACH_NOROUTE: 2394 (void)printf("No Route to Destination\n"); 2395 break; 2396 case ICMP6_DST_UNREACH_ADMIN: 2397 (void)printf("Destination Administratively " 2398 "Unreachable\n"); 2399 break; 2400 case ICMP6_DST_UNREACH_BEYONDSCOPE: 2401 (void)printf("Destination Unreachable Beyond Scope\n"); 2402 break; 2403 case ICMP6_DST_UNREACH_ADDR: 2404 (void)printf("Destination Host Unreachable\n"); 2405 break; 2406 case ICMP6_DST_UNREACH_NOPORT: 2407 (void)printf("Destination Port Unreachable\n"); 2408 break; 2409 default: 2410 (void)printf("Destination Unreachable, Bad Code: %d\n", 2411 icp->icmp6_code); 2412 break; 2413 } 2414 /* Print returned IP header information */ 2415 pr_retip((struct ip6_hdr *)(icp + 1), end); 2416 break; 2417 case ICMP6_PACKET_TOO_BIG: 2418 (void)printf("Packet too big mtu = %d\n", 2419 (int)ntohl(icp->icmp6_mtu)); 2420 pr_retip((struct ip6_hdr *)(icp + 1), end); 2421 break; 2422 case ICMP6_TIME_EXCEEDED: 2423 switch (icp->icmp6_code) { 2424 case ICMP6_TIME_EXCEED_TRANSIT: 2425 (void)printf("Time to live exceeded\n"); 2426 break; 2427 case ICMP6_TIME_EXCEED_REASSEMBLY: 2428 (void)printf("Frag reassembly time exceeded\n"); 2429 break; 2430 default: 2431 (void)printf("Time exceeded, Bad Code: %d\n", 2432 icp->icmp6_code); 2433 break; 2434 } 2435 pr_retip((struct ip6_hdr *)(icp + 1), end); 2436 break; 2437 case ICMP6_PARAM_PROB: 2438 (void)printf("Parameter problem: "); 2439 switch (icp->icmp6_code) { 2440 case ICMP6_PARAMPROB_HEADER: 2441 (void)printf("Erroneous Header "); 2442 break; 2443 case ICMP6_PARAMPROB_NEXTHEADER: 2444 (void)printf("Unknown Nextheader "); 2445 break; 2446 case ICMP6_PARAMPROB_OPTION: 2447 (void)printf("Unrecognized Option "); 2448 break; 2449 default: 2450 (void)printf("Bad code(%d) ", icp->icmp6_code); 2451 break; 2452 } 2453 (void)printf("pointer = 0x%02x\n", 2454 (u_int32_t)ntohl(icp->icmp6_pptr)); 2455 pr_retip((struct ip6_hdr *)(icp + 1), end); 2456 break; 2457 case ICMP6_ECHO_REQUEST: 2458 (void)printf("Echo Request"); 2459 /* XXX ID + Seq + Data */ 2460 break; 2461 case ICMP6_ECHO_REPLY: 2462 (void)printf("Echo Reply"); 2463 /* XXX ID + Seq + Data */ 2464 break; 2465 case ICMP6_MEMBERSHIP_QUERY: 2466 (void)printf("Listener Query"); 2467 break; 2468 case ICMP6_MEMBERSHIP_REPORT: 2469 (void)printf("Listener Report"); 2470 break; 2471 case ICMP6_MEMBERSHIP_REDUCTION: 2472 (void)printf("Listener Done"); 2473 break; 2474 case ND_ROUTER_SOLICIT: 2475 (void)printf("Router Solicitation"); 2476 break; 2477 case ND_ROUTER_ADVERT: 2478 (void)printf("Router Advertisement"); 2479 break; 2480 case ND_NEIGHBOR_SOLICIT: 2481 (void)printf("Neighbor Solicitation"); 2482 break; 2483 case ND_NEIGHBOR_ADVERT: 2484 (void)printf("Neighbor Advertisement"); 2485 break; 2486 case ND_REDIRECT: 2487 red = (struct nd_redirect *)icp; 2488 (void)printf("Redirect\n"); 2489 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, 2490 sizeof(ntop_buf))) 2491 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2492 (void)printf("Destination: %s", ntop_buf); 2493 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, 2494 sizeof(ntop_buf))) 2495 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2496 (void)printf(" New Target: %s", ntop_buf); 2497 break; 2498 case ICMP6_NI_QUERY: 2499 (void)printf("Node Information Query"); 2500 /* XXX ID + Seq + Data */ 2501 ni = (struct icmp6_nodeinfo *)icp; 2502 l = end - (u_char *)(ni + 1); 2503 printf(", "); 2504 switch (ntohs(ni->ni_qtype)) { 2505 case NI_QTYPE_NOOP: 2506 (void)printf("NOOP"); 2507 break; 2508 case NI_QTYPE_SUPTYPES: 2509 (void)printf("Supported qtypes"); 2510 break; 2511 case NI_QTYPE_FQDN: 2512 (void)printf("DNS name"); 2513 break; 2514 case NI_QTYPE_NODEADDR: 2515 (void)printf("nodeaddr"); 2516 break; 2517 case NI_QTYPE_IPV4ADDR: 2518 (void)printf("IPv4 nodeaddr"); 2519 break; 2520 default: 2521 (void)printf("unknown qtype"); 2522 break; 2523 } 2524 if (options & F_VERBOSE) { 2525 switch (ni->ni_code) { 2526 case ICMP6_NI_SUBJ_IPV6: 2527 if (l == sizeof(struct in6_addr) && 2528 inet_ntop(AF_INET6, ni + 1, ntop_buf, 2529 sizeof(ntop_buf)) != NULL) { 2530 (void)printf(", subject=%s(%s)", 2531 niqcode[ni->ni_code], ntop_buf); 2532 } else { 2533 #if 1 2534 /* backward compat to -W */ 2535 (void)printf(", oldfqdn"); 2536 #else 2537 (void)printf(", invalid"); 2538 #endif 2539 } 2540 break; 2541 case ICMP6_NI_SUBJ_FQDN: 2542 if (end == (u_char *)(ni + 1)) { 2543 (void)printf(", no subject"); 2544 break; 2545 } 2546 printf(", subject=%s", niqcode[ni->ni_code]); 2547 cp = (const u_char *)(ni + 1); 2548 cp = dnsdecode(cp, end, NULL, dnsname, 2549 sizeof(dnsname)); 2550 if (cp != NULL) 2551 printf("(%s)", dnsname); 2552 else 2553 printf("(invalid)"); 2554 break; 2555 case ICMP6_NI_SUBJ_IPV4: 2556 if (l == sizeof(struct in_addr) && 2557 inet_ntop(AF_INET, ni + 1, ntop_buf, 2558 sizeof(ntop_buf)) != NULL) { 2559 (void)printf(", subject=%s(%s)", 2560 niqcode[ni->ni_code], ntop_buf); 2561 } else 2562 (void)printf(", invalid"); 2563 break; 2564 default: 2565 (void)printf(", invalid"); 2566 break; 2567 } 2568 } 2569 break; 2570 case ICMP6_NI_REPLY: 2571 (void)printf("Node Information Reply"); 2572 /* XXX ID + Seq + Data */ 2573 ni = (struct icmp6_nodeinfo *)icp; 2574 printf(", "); 2575 switch (ntohs(ni->ni_qtype)) { 2576 case NI_QTYPE_NOOP: 2577 (void)printf("NOOP"); 2578 break; 2579 case NI_QTYPE_SUPTYPES: 2580 (void)printf("Supported qtypes"); 2581 break; 2582 case NI_QTYPE_FQDN: 2583 (void)printf("DNS name"); 2584 break; 2585 case NI_QTYPE_NODEADDR: 2586 (void)printf("nodeaddr"); 2587 break; 2588 case NI_QTYPE_IPV4ADDR: 2589 (void)printf("IPv4 nodeaddr"); 2590 break; 2591 default: 2592 (void)printf("unknown qtype"); 2593 break; 2594 } 2595 if (options & F_VERBOSE) { 2596 if (ni->ni_code > nitems(nircode)) 2597 printf(", invalid"); 2598 else 2599 printf(", %s", nircode[ni->ni_code]); 2600 } 2601 break; 2602 default: 2603 (void)printf("Bad ICMP type: %d", icp->icmp6_type); 2604 } 2605 } 2606 2607 /* 2608 * pr_iph -- 2609 * Print an IP6 header. 2610 */ 2611 static void 2612 pr_iph(struct ip6_hdr *ip6) 2613 { 2614 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 2615 u_int8_t tc; 2616 char ntop_buf[INET6_ADDRSTRLEN]; 2617 2618 tc = *(&ip6->ip6_vfc + 1); /* XXX */ 2619 tc = (tc >> 4) & 0x0f; 2620 tc |= (ip6->ip6_vfc << 4); 2621 2622 printf("Vr TC Flow Plen Nxt Hlim\n"); 2623 printf(" %1x %02x %05x %04x %02x %02x\n", 2624 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), 2625 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); 2626 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) 2627 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2628 printf("%s->", ntop_buf); 2629 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) 2630 strlcpy(ntop_buf, "?", sizeof(ntop_buf)); 2631 printf("%s\n", ntop_buf); 2632 } 2633 2634 /* 2635 * pr_addr -- 2636 * Return an ascii host address as a dotted quad and optionally with 2637 * a hostname. 2638 */ 2639 static const char * 2640 pr_addr(struct sockaddr *addr, int addrlen) 2641 { 2642 static char buf[NI_MAXHOST]; 2643 int flag = 0; 2644 2645 if ((options & F_HOSTNAME) == 0) 2646 flag |= NI_NUMERICHOST; 2647 2648 if (cap_getnameinfo(capdns, addr, addrlen, buf, sizeof(buf), NULL, 0, 2649 flag) == 0) 2650 return (buf); 2651 else 2652 return "?"; 2653 } 2654 2655 /* 2656 * pr_retip -- 2657 * Dump some info on a returned (via ICMPv6) IPv6 packet. 2658 */ 2659 static void 2660 pr_retip(struct ip6_hdr *ip6, u_char *end) 2661 { 2662 u_char *cp = (u_char *)ip6, nh; 2663 int hlen; 2664 2665 if ((size_t)(end - (u_char *)ip6) < sizeof(*ip6)) { 2666 printf("IP6"); 2667 goto trunc; 2668 } 2669 pr_iph(ip6); 2670 hlen = sizeof(*ip6); 2671 2672 nh = ip6->ip6_nxt; 2673 cp += hlen; 2674 while (end - cp >= 8) { 2675 #ifdef IPSEC 2676 struct ah ah; 2677 #endif 2678 2679 switch (nh) { 2680 case IPPROTO_HOPOPTS: 2681 printf("HBH "); 2682 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; 2683 nh = ((struct ip6_hbh *)cp)->ip6h_nxt; 2684 break; 2685 case IPPROTO_DSTOPTS: 2686 printf("DSTOPT "); 2687 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; 2688 nh = ((struct ip6_dest *)cp)->ip6d_nxt; 2689 break; 2690 case IPPROTO_FRAGMENT: 2691 printf("FRAG "); 2692 hlen = sizeof(struct ip6_frag); 2693 nh = ((struct ip6_frag *)cp)->ip6f_nxt; 2694 break; 2695 case IPPROTO_ROUTING: 2696 printf("RTHDR "); 2697 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; 2698 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; 2699 break; 2700 #ifdef IPSEC 2701 case IPPROTO_AH: 2702 printf("AH "); 2703 memcpy(&ah, cp, sizeof(ah)); 2704 hlen = (ah.ah_len+2) << 2; 2705 nh = ah.ah_nxt; 2706 break; 2707 #endif 2708 case IPPROTO_ICMPV6: 2709 printf("ICMP6: type = %d, code = %d\n", 2710 *cp, *(cp + 1)); 2711 return; 2712 case IPPROTO_ESP: 2713 printf("ESP\n"); 2714 return; 2715 case IPPROTO_TCP: 2716 printf("TCP: from port %u, to port %u (decimal)\n", 2717 (*cp * 256 + *(cp + 1)), 2718 (*(cp + 2) * 256 + *(cp + 3))); 2719 return; 2720 case IPPROTO_UDP: 2721 printf("UDP: from port %u, to port %u (decimal)\n", 2722 (*cp * 256 + *(cp + 1)), 2723 (*(cp + 2) * 256 + *(cp + 3))); 2724 return; 2725 default: 2726 printf("Unknown Header(%d)\n", nh); 2727 return; 2728 } 2729 2730 if ((cp += hlen) >= end) 2731 goto trunc; 2732 } 2733 if (end - cp < 8) 2734 goto trunc; 2735 2736 putchar('\n'); 2737 return; 2738 2739 trunc: 2740 printf("...\n"); 2741 return; 2742 } 2743 2744 static void 2745 fill(char *bp, char *patp) 2746 { 2747 int ii, jj, kk; 2748 int pat[16]; 2749 char *cp; 2750 2751 for (cp = patp; *cp; cp++) 2752 if (!isxdigit(*cp)) 2753 errx(1, "patterns must be specified as hex digits"); 2754 ii = sscanf(patp, 2755 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 2756 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 2757 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 2758 &pat[13], &pat[14], &pat[15]); 2759 2760 /* xxx */ 2761 if (ii > 0) 2762 for (kk = 0; 2763 (size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + ii; 2764 kk += ii) 2765 for (jj = 0; jj < ii; ++jj) 2766 bp[jj + kk] = pat[jj]; 2767 if (!(options & F_QUIET)) { 2768 (void)printf("PATTERN: 0x"); 2769 for (jj = 0; jj < ii; ++jj) 2770 (void)printf("%02x", bp[jj] & 0xFF); 2771 (void)printf("\n"); 2772 } 2773 } 2774 2775 #ifdef IPSEC 2776 #ifdef IPSEC_POLICY_IPSEC 2777 static int 2778 setpolicy(int so __unused, char *policy) 2779 { 2780 char *buf; 2781 2782 if (policy == NULL) 2783 return 0; /* ignore */ 2784 2785 buf = ipsec_set_policy(policy, strlen(policy)); 2786 if (buf == NULL) 2787 errx(1, "%s", ipsec_strerror()); 2788 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, 2789 ipsec_get_policylen(buf)) < 0) 2790 warnx("Unable to set IPsec policy"); 2791 free(buf); 2792 2793 return 0; 2794 } 2795 #endif 2796 #endif 2797 2798 static char * 2799 nigroup(char *name, int nig_oldmcprefix) 2800 { 2801 char *p; 2802 char *q; 2803 MD5_CTX ctxt; 2804 u_int8_t digest[16]; 2805 u_int8_t c; 2806 size_t l; 2807 char hbuf[NI_MAXHOST]; 2808 struct in6_addr in6; 2809 int valid; 2810 2811 p = strchr(name, '.'); 2812 if (!p) 2813 p = name + strlen(name); 2814 l = p - name; 2815 if (l > 63 || l > sizeof(hbuf) - 1) 2816 return NULL; /*label too long*/ 2817 strncpy(hbuf, name, l); 2818 hbuf[(int)l] = '\0'; 2819 2820 for (q = name; *q; q++) { 2821 if (isupper(*(unsigned char *)q)) 2822 *q = tolower(*(unsigned char *)q); 2823 } 2824 2825 /* generate 16 bytes of pseudo-random value. */ 2826 memset(&ctxt, 0, sizeof(ctxt)); 2827 MD5Init(&ctxt); 2828 c = l & 0xff; 2829 MD5Update(&ctxt, &c, sizeof(c)); 2830 MD5Update(&ctxt, (unsigned char *)name, l); 2831 MD5Final(digest, &ctxt); 2832 2833 if (nig_oldmcprefix) { 2834 /* draft-ietf-ipngwg-icmp-name-lookup */ 2835 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6); 2836 } else { 2837 /* RFC 4620 */ 2838 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6); 2839 } 2840 if (valid != 1) 2841 return NULL; /*XXX*/ 2842 2843 if (nig_oldmcprefix) { 2844 /* draft-ietf-ipngwg-icmp-name-lookup */ 2845 bcopy(digest, &in6.s6_addr[12], 4); 2846 } else { 2847 /* RFC 4620 */ 2848 bcopy(digest, &in6.s6_addr[13], 3); 2849 } 2850 2851 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL) 2852 return NULL; 2853 2854 return strdup(hbuf); 2855 } 2856 2857 static cap_channel_t * 2858 capdns_setup(void) 2859 { 2860 cap_channel_t *capcas, *capdnsloc; 2861 #ifdef WITH_CASPER 2862 const char *types[2]; 2863 int families[1]; 2864 #endif 2865 capcas = cap_init(); 2866 if (capcas == NULL) 2867 err(1, "unable to create casper process"); 2868 capdnsloc = cap_service_open(capcas, "system.dns"); 2869 /* Casper capability no longer needed. */ 2870 cap_close(capcas); 2871 if (capdnsloc == NULL) 2872 err(1, "unable to open system.dns service"); 2873 #ifdef WITH_CASPER 2874 types[0] = "NAME2ADDR"; 2875 types[1] = "ADDR2NAME"; 2876 if (cap_dns_type_limit(capdnsloc, types, nitems(types)) < 0) 2877 err(1, "unable to limit access to system.dns service"); 2878 families[0] = AF_INET6; 2879 if (cap_dns_family_limit(capdnsloc, families, nitems(families)) < 0) 2880 err(1, "unable to limit access to system.dns service"); 2881 #endif 2882 return (capdnsloc); 2883 } 2884