sbin/ping6/ping6.c

   1 /*      $KAME: ping6.c,v 1.126 2001/05/17 03:39:08 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  * @(#) Copyright (c) 1989, 1993 The Regents of the University of California.  All rights reserved.
  32  * @(#)ping.c   8.1 (Berkeley) 6/5/93
  33  * $FreeBSD: src/sbin/ping6/ping6.c,v 1.4.2.10 2002/12/09 03:04:44 suz Exp $
  34  * $DragonFly: src/sbin/ping6/ping6.c,v 1.6 2004/02/04 17:40:01 joerg Exp $
  35  */
  36
  37 /*      BSDI    ping.c,v 2.3 1996/01/21 17:56:50 jch Exp        */
  38
  39 /*
  40  * Copyright (c) 1989, 1993
  41  *      The Regents of the University of California.  All rights reserved.
  42  *
  43  * This code is derived from software contributed to Berkeley by
  44  * Mike Muuss.
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  * 3. All advertising materials mentioning features or use of this software
  55  *    must display the following acknowledgement:
  56  *      This product includes software developed by the University of
  57  *      California, Berkeley and its contributors.
  58  * 4. Neither the name of the University nor the names of its contributors
  59  *    may be used to endorse or promote products derived from this software
  60  *    without specific prior written permission.
  61  *
  62  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  63  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  64  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  65  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  66  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  67  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  68  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  69  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  70  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  71  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  72  * SUCH DAMAGE.
  73  */
  74
  75 /*
  76  * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
  77  * measure round-trip-delays and packet loss across network paths.
  78  *
  79  * Author -
  80  *      Mike Muuss
  81  *      U. S. Army Ballistic Research Laboratory
  82  *      December, 1983
  83  *
  84  * Status -
  85  *      Public Domain.  Distribution Unlimited.
  86  * Bugs -
  87  *      More statistics could always be gathered.
  88  *      This program has to run SUID to ROOT to access the ICMP socket.
  89  */
  90 /*
  91  * NOTE:
  92  * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
  93  * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
  94  * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
  95  * network attached to 1 or more interfaces)
  96  */
  97
  98 #include <sys/param.h>
  99 #include <sys/uio.h>
 100 #include <sys/socket.h>
 101 #include <sys/time.h>
 102
 103 #include <net/if.h>
 104 #include <net/route.h>
 105
 106 #include <netinet/in.h>
 107 #include <netinet/ip6.h>
 108 #include <netinet/icmp6.h>
 109 #include <arpa/inet.h>
 110 #include <arpa/nameser.h>
 111 #include <netdb.h>
 112
 113 #include <ctype.h>
 114 #include <err.h>
 115 #include <errno.h>
 116 #include <fcntl.h>
 117 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__)
 118 #include <math.h>
 119 #endif
 120 #include <signal.h>
 121 #include <stdio.h>
 122 #include <stdlib.h>
 123 #include <string.h>
 124 #include <unistd.h>
 125
 126 #ifdef IPSEC
 127 #include <netinet6/ah.h>
 128 #include <netinet6/ipsec.h>
 129 #endif
 130
 131 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
 132 #include <md5.h>
 133 #else
 134 #include "md5.h"
 135 #endif
 136
 137 #define MAXPACKETLEN    131072
 138 #define IP6LEN          40
 139 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 140 #define ICMP6ECHOTMLEN sizeof(struct timeval)
 141 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 142 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 143 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 144 #define EXTRA           256     /* for AH and various other headers. weird. */
 145 #define DEFDATALEN      ICMP6ECHOTMLEN
 146 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 147 #define NROUTES         9               /* number of record route slots */
 148
 149 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 150 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 151 #define SET(bit)        (A(bit) |= B(bit))
 152 #define CLR(bit)        (A(bit) &= (~B(bit)))
 153 #define TST(bit)        (A(bit) & B(bit))
 154
 155 #define F_FLOOD         0x0001
 156 #define F_INTERVAL      0x0002
 157 #define F_PINGFILLED    0x0008
 158 #define F_QUIET         0x0010
 159 #define F_RROUTE        0x0020
 160 #define F_SO_DEBUG      0x0040
 161 #define F_VERBOSE       0x0100
 162 #ifdef IPSEC
 163 #ifdef IPSEC_POLICY_IPSEC
 164 #define F_POLICY        0x0400
 165 #else
 166 #define F_AUTHHDR       0x0200
 167 #define F_ENCRYPT       0x0400
 168 #endif /*IPSEC_POLICY_IPSEC*/
 169 #endif /*IPSEC*/
 170 #define F_NODEADDR      0x0800
 171 #define F_FQDN          0x1000
 172 #define F_INTERFACE     0x2000
 173 #define F_SRCADDR       0x4000
 174 #ifdef IPV6_REACHCONF
 175 #define F_REACHCONF     0x8000
 176 #endif
 177 #define F_HOSTNAME      0x10000
 178 #define F_FQDNOLD       0x20000
 179 #define F_NIGROUP       0x40000
 180 #define F_SUPTYPES      0x80000
 181 #define F_NOMINMTU      0x100000
 182 #define F_NOUSERDATA    (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
 183 u_int options;
 184
 185 #define IN6LEN          sizeof(struct in6_addr)
 186 #define SA6LEN          sizeof(struct sockaddr_in6)
 187 #define DUMMY_PORT      10101
 188
 189 #define SIN6(s) ((struct sockaddr_in6 *)(s))
 190
 191 /*
 192  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 193  * number of received sequence numbers we can keep track of.  Change 128
 194  * to 8192 for complete accuracy...
 195  */
 196 #define MAX_DUP_CHK     (8 * 8192)
 197 int mx_dup_ck = MAX_DUP_CHK;
 198 char rcvd_tbl[MAX_DUP_CHK / 8];
 199
 200 struct addrinfo *res;
 201 struct sockaddr_in6 dst;        /* who to ping6 */
 202 struct sockaddr_in6 src;        /* src addr of this packet */
 203 int datalen = DEFDATALEN;
 204 int s;                          /* socket file descriptor */
 205 u_char outpack[MAXPACKETLEN];
 206 char BSPACE = '\b';             /* characters written for flood */
 207 char DOT = '.';
 208 char *hostname;
 209 int ident;                      /* process id to identify our packets */
 210 u_int8_t nonce[8];              /* nonce field for node information */
 211 struct in6_addr srcaddr;
 212 int hoplimit = -1;              /* hoplimit */
 213 int pathmtu = 0;                /* path MTU for the destination.  0 = unspec. */
 214
 215 /* counters */
 216 long npackets;                  /* max packets to transmit */
 217 long nreceived;                 /* # of packets we got back */
 218 long nrepeats;                  /* number of duplicates */
 219 long ntransmitted;              /* sequence # for outbound packets = #sent */
 220 struct timeval interval = {1, 0}; /* interval between packets */
 221
 222 /* timing */
 223 int timing;                     /* flag to do timing */
 224 double tmin = 999999999.0;      /* minimum round trip time */
 225 double tmax = 0.0;              /* maximum round trip time */
 226 double tsum = 0.0;              /* sum of all times, for doing average */
 227 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__)
 228 double tsumsq = 0.0;            /* sum of all times squared, for std. dev. */
 229 #endif
 230
 231 /* for node addresses */
 232 u_short naflags;
 233
 234 /* for ancillary data(advanced API) */
 235 struct msghdr smsghdr;
 236 struct iovec smsgiov;
 237 char *scmsg = 0;
 238
 239 volatile int signo;
 240 volatile sig_atomic_t seenalrm;
 241 volatile sig_atomic_t seenint;
 242 #ifdef SIGINFO
 243 volatile sig_atomic_t seeninfo;
 244 #endif
 245
 246 int      main(int, char *[]);
 247 void     fill(char *, char *);
 248 int      get_hoplim(struct msghdr *);
 249 int      get_pathmtu(struct msghdr *);
 250 void     set_pathmtu(int);
 251 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
 252 void     onsignal(int);
 253 void     retransmit(void);
 254 void     onint(int);
 255 size_t   pingerlen(void);
 256 int      pinger(void);
 257 const char *pr_addr(struct sockaddr *, int);
 258 void     pr_icmph(struct icmp6_hdr *, u_char *);
 259 void     pr_iph(struct ip6_hdr *);
 260 void     pr_suptypes(struct icmp6_nodeinfo *, size_t);
 261 void     pr_nodeaddr(struct icmp6_nodeinfo *, int);
 262 int      myechoreply(const struct icmp6_hdr *);
 263 int      mynireply(const struct icmp6_nodeinfo *);
 264 char *dnsdecode(const u_char **, const u_char *, const u_char *,
 265         u_char *, size_t);
 266 void     pr_pack(u_char *, int, struct msghdr *);
 267 void     pr_exthdrs(struct msghdr *);
 268 void     pr_ip6opt(void *);
 269 void     pr_rthdr(void *);
 270 int      pr_bitrange(u_int32_t, int, int);
 271 void     pr_retip(struct ip6_hdr *, u_char *);
 272 void     summary(void);
 273 void     tvsub(struct timeval *, struct timeval *);
 274 int      setpolicy(int, char *);
 275 char    *nigroup(char *);
 276 void     usage(void);
 277
 278 int
 279 main(int argc, char **argv)
 280 {
 281         struct itimerval itimer;
 282         struct sockaddr_in6 from;
 283         struct timeval timeout, *tv;
 284         struct addrinfo hints;
 285         fd_set *fdmaskp;
 286         int fdmasks;
 287         register int cc, i;
 288         int ch, fromlen, hold, packlen, preload, optval, ret_ga;
 289         u_char *datap, *packet;
 290         char *e, *target, *ifname = NULL;
 291         int ip6optlen = 0;
 292         struct cmsghdr *scmsgp = NULL;
 293         int sockbufsize = 0;
 294         int usepktinfo = 0;
 295         struct in6_pktinfo *pktinfo = NULL;
 296 #ifdef USE_RFC2292BIS
 297         struct ip6_rthdr *rthdr = NULL;
 298 #endif
 299 #ifdef IPSEC_POLICY_IPSEC
 300         char *policy_in = NULL;
 301         char *policy_out = NULL;
 302 #endif
 303         double intval;
 304         size_t rthlen;
 305
 306         /* just to be sure */
 307         memset(&smsghdr, 0, sizeof(smsghdr));
 308         memset(&smsgiov, 0, sizeof(smsgiov));
 309
 310         preload = 0;
 311         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 312 #ifndef IPSEC
 313 #define ADDOPTS
 314 #else
 315 #ifdef IPSEC_POLICY_IPSEC
 316 #define ADDOPTS "P:"
 317 #else
 318 #define ADDOPTS "AE"
 319 #endif /*IPSEC_POLICY_IPSEC*/
 320 #endif
 321         while ((ch = getopt(argc, argv,
 322             "a:b:c:dfHh:I:i:l:mnNp:qRS:s:tvwW" ADDOPTS)) != -1) {
 323 #undef ADDOPTS
 324                 switch (ch) {
 325                 case 'a':
 326                 {
 327                         char *cp;
 328
 329                         options &= ~F_NOUSERDATA;
 330                         options |= F_NODEADDR;
 331                         for (cp = optarg; *cp != '\0'; cp++) {
 332                                 switch (*cp) {
 333                                 case 'a':
 334                                         naflags |= NI_NODEADDR_FLAG_ALL;
 335                                         break;
 336                                 case 'c':
 337                                 case 'C':
 338                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 339                                         break;
 340                                 case 'l':
 341                                 case 'L':
 342                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 343                                         break;
 344                                 case 's':
 345                                 case 'S':
 346                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 347                                         break;
 348                                 case 'g':
 349                                 case 'G':
 350                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 351                                         break;
 352                                 case 'A': /* experimental. not in the spec */
 353 #ifdef NI_NODEADDR_FLAG_ANYCAST
 354                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 355                                         break;
 356 #else
 357                                         errx(1,
 358 "-a A is not supported on the platform");
 359                                         /*NOTREACHED*/
 360 #endif
 361                                 default:
 362                                         usage();
 363                                         /*NOTREACHED*/
 364                                 }
 365                         }
 366                         break;
 367                 }
 368                 case 'b':
 369 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 370                         sockbufsize = atoi(optarg);
 371 #else
 372                         err(1,
 373 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 374 #endif
 375                         break;
 376                 case 'c':
 377                         npackets = strtol(optarg, &e, 10);
 378                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 379                                 errx(1,
 380                                     "illegal number of packets -- %s", optarg);
 381                         break;
 382                 case 'd':
 383                         options |= F_SO_DEBUG;
 384                         break;
 385                 case 'f':
 386                         if (getuid()) {
 387                                 errno = EPERM;
 388                                 errx(1, "Must be superuser to flood ping");
 389                         }
 390                         options |= F_FLOOD;
 391                         setbuf(stdout, (char *)NULL);
 392                         break;
 393                 case 'H':
 394                         options |= F_HOSTNAME;
 395                         break;
 396                 case 'h':               /* hoplimit */
 397                         hoplimit = strtol(optarg, &e, 10);
 398                         if (255 < hoplimit || hoplimit < -1)
 399                                 errx(1,
 400                                     "illegal hoplimit -- %s", optarg);
 401                         break;
 402                 case 'I':
 403                         ifname = optarg;
 404                         options |= F_INTERFACE;
 405 #ifndef USE_SIN6_SCOPE_ID
 406                         usepktinfo++;
 407 #endif
 408                         break;
 409                 case 'i':               /* wait between sending packets */
 410                         intval = strtod(optarg, &e);
 411                         if (*optarg == '\0' || *e != '\0')
 412                                 errx(1, "illegal timing interval %s", optarg);
 413                         if (intval < 1 && getuid()) {
 414                                 errx(1, "%s: only root may use interval < 1s",
 415                                     strerror(EPERM));
 416                         }
 417                         interval.tv_sec = (long)intval;
 418                         interval.tv_usec =
 419                             (long)((intval - interval.tv_sec) * 1000000);
 420                         if (interval.tv_sec < 0)
 421                                 errx(1, "illegal timing interval %s", optarg);
 422                         /* less than 1/hz does not make sense */
 423                         if (interval.tv_sec == 0 && interval.tv_usec < 10000) {
 424                                 warnx("too small interval, raised to 0.01");
 425                                 interval.tv_usec = 10000;
 426                         }
 427                         options |= F_INTERVAL;
 428                         break;
 429                 case 'l':
 430                         if (getuid()) {
 431                                 errno = EPERM;
 432                                 errx(1, "Must be superuser to preload");
 433                         }
 434                         preload = strtol(optarg, &e, 10);
 435                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 436                                 errx(1, "illegal preload value -- %s", optarg);
 437                         break;
 438                 case 'm':
 439 #ifdef IPV6_USE_MIN_MTU
 440                         options |= F_NOMINMTU;
 441                         break;
 442 #else
 443                         errx(1, "-%c is not supported on this platform", ch);
 444                         /*NOTREACHED*/
 445 #endif
 446                 case 'n':
 447                         options &= ~F_HOSTNAME;
 448                         break;
 449                 case 'N':
 450                         options |= F_NIGROUP;
 451                         break;
 452                 case 'p':               /* fill buffer with user pattern */
 453                         options |= F_PINGFILLED;
 454                         fill((char *)datap, optarg);
 455                                 break;
 456                 case 'q':
 457                         options |= F_QUIET;
 458                         break;
 459                 case 'R':
 460 #ifdef IPV6_REACHCONF
 461                         options |= F_REACHCONF;
 462                         break;
 463 #else
 464                         errx(1, "-R is not supported in this configuration");
 465 #endif
 466                 case 'S':
 467                         /* XXX: use getaddrinfo? */
 468                         if (inet_pton(AF_INET6, optarg, (void *)&srcaddr) != 1)
 469                                 errx(1, "invalid IPv6 address: %s", optarg);
 470                         options |= F_SRCADDR;
 471                         usepktinfo++;
 472                         break;
 473                 case 's':               /* size of packet to send */
 474                         datalen = strtol(optarg, &e, 10);
 475                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 476                                 errx(1, "illegal datalen value -- %s", optarg);
 477                         if (datalen > MAXDATALEN) {
 478                                 errx(1,
 479                                     "datalen value too large, maximum is %d",
 480                                     MAXDATALEN);
 481                         }
 482                         break;
 483                 case 't':
 484                         options &= ~F_NOUSERDATA;
 485                         options |= F_SUPTYPES;
 486                         break;
 487                 case 'v':
 488                         options |= F_VERBOSE;
 489                         break;
 490                 case 'w':
 491                         options &= ~F_NOUSERDATA;
 492                         options |= F_FQDN;
 493                         break;
 494                 case 'W':
 495                         options &= ~F_NOUSERDATA;
 496                         options |= F_FQDNOLD;
 497                         break;
 498 #ifdef IPSEC
 499 #ifdef IPSEC_POLICY_IPSEC
 500                 case 'P':
 501                         options |= F_POLICY;
 502                         if (!strncmp("in", optarg, 2)) {
 503                                 if ((policy_in = strdup(optarg)) == NULL)
 504                                         errx(1, "strdup");
 505                         } else if (!strncmp("out", optarg, 3)) {
 506                                 if ((policy_out = strdup(optarg)) == NULL)
 507                                         errx(1, "strdup");
 508                         } else
 509                                 errx(1, "invalid security policy");
 510                         break;
 511 #else
 512                 case 'A':
 513                         options |= F_AUTHHDR;
 514                         break;
 515                 case 'E':
 516                         options |= F_ENCRYPT;
 517                         break;
 518 #endif /*IPSEC_POLICY_IPSEC*/
 519 #endif /*IPSEC*/
 520                 default:
 521                         usage();
 522                         /*NOTREACHED*/
 523                 }
 524         }
 525         argc -= optind;
 526         argv += optind;
 527
 528         if (argc < 1) {
 529                 usage();
 530                 /*NOTREACHED*/
 531         }
 532
 533         if (argc > 1) {
 534 #ifdef IPV6_RECVRTHDR   /* 2292bis */
 535                 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
 536                     argc - 1));
 537 #else  /* RFC2292 */
 538                 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
 539 #endif
 540                 if (rthlen == 0) {
 541                         errx(1, "too many intermediate hops");
 542                         /*NOTREACHED*/
 543                 }
 544                 ip6optlen += rthlen;
 545         }
 546
 547         if (options & F_NIGROUP) {
 548                 target = nigroup(argv[argc - 1]);
 549                 if (target == NULL) {
 550                         usage();
 551                         /*NOTREACHED*/
 552                 }
 553         } else
 554                 target = argv[argc - 1];
 555
 556         /* getaddrinfo */
 557         bzero(&hints, sizeof(struct addrinfo));
 558         hints.ai_flags = AI_CANONNAME;
 559         hints.ai_family = AF_INET6;
 560         hints.ai_socktype = SOCK_RAW;
 561         hints.ai_protocol = IPPROTO_ICMPV6;
 562
 563         ret_ga = getaddrinfo(target, NULL, &hints, &res);
 564         if (ret_ga) {
 565                 fprintf(stderr, "ping6: %s\n", gai_strerror(ret_ga));
 566                 exit(1);
 567         }
 568         if (res->ai_canonname)
 569                 hostname = res->ai_canonname;
 570         else
 571                 hostname = target;
 572
 573         if (!res->ai_addr)
 574                 errx(1, "getaddrinfo failed");
 575
 576         (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
 577
 578         if ((s = socket(res->ai_family, res->ai_socktype,
 579             res->ai_protocol)) < 0)
 580                 err(1, "socket");
 581
 582         /*
 583          * let the kerel pass extension headers of incoming packets,
 584          * for privileged socket options
 585          */
 586         if ((options & F_VERBOSE) != 0) {
 587                 int opton = 1;
 588
 589 #ifdef IPV6_RECVHOPOPTS
 590                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 591                     sizeof(opton)))
 592                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 593 #else  /* old adv. API */
 594                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 595                     sizeof(opton)))
 596                         err(1, "setsockopt(IPV6_HOPOPTS)");
 597 #endif
 598 #ifdef IPV6_RECVDSTOPTS
 599                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 600                     sizeof(opton)))
 601                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 602 #else  /* old adv. API */
 603                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 604                     sizeof(opton)))
 605                         err(1, "setsockopt(IPV6_DSTOPTS)");
 606 #endif
 607 #ifdef IPV6_RECVRTHDRDSTOPTS
 608                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 609                     sizeof(opton)))
 610                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 611 #endif
 612         }
 613
 614         /* revoke root privilege */
 615         seteuid(getuid());
 616         setuid(getuid());
 617
 618         if (options & F_FLOOD && options & F_INTERVAL)
 619                 errx(1, "-f and -i incompatible options");
 620
 621         if ((options & F_NOUSERDATA) == 0) {
 622                 if (datalen >= sizeof(struct timeval)) {
 623                         /* we can time transfer */
 624                         timing = 1;
 625                 } else
 626                         timing = 0;
 627                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 628                 if (options & F_VERBOSE)
 629                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 630                 else
 631                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 632         } else {
 633                 /* suppress timing for node information query */
 634                 timing = 0;
 635                 datalen = 2048;
 636                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 637         }
 638
 639         if (!(packet = (u_char *)malloc((u_int)packlen)))
 640                 err(1, "Unable to allocate packet");
 641         if (!(options & F_PINGFILLED))
 642                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 643                         *datap++ = i;
 644
 645         ident = getpid() & 0xFFFF;
 646 #ifndef __OpenBSD__
 647         gettimeofday(&timeout, NULL);
 648         srand((unsigned int)(timeout.tv_sec ^ timeout.tv_usec ^ (long)ident));
 649         memset(nonce, 0, sizeof(nonce));
 650         for (i = 0; i < sizeof(nonce); i += sizeof(int))
 651                 *((int *)&nonce[i]) = rand();
 652 #else
 653         memset(nonce, 0, sizeof(nonce));
 654         for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t))
 655                 *((u_int32_t *)&nonce[i]) = arc4random();
 656 #endif
 657
 658         hold = 1;
 659
 660         if (options & F_SO_DEBUG)
 661                 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 662                     sizeof(hold));
 663         optval = IPV6_DEFHLIM;
 664         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 665                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 666                     &optval, sizeof(optval)) == -1)
 667                         err(1, "IPV6_MULTICAST_HOPS");
 668 #ifdef IPV6_USE_MIN_MTU
 669         if ((options & F_NOMINMTU) == 0) {
 670                 optval = 1;
 671                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 672                     &optval, sizeof(optval)) == -1)
 673                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 674         }
 675 #ifdef IPV6_RECVPATHMTU
 676         else {
 677                 optval = 1;
 678                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 679                     &optval, sizeof(optval)) == -1)
 680                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 681         }
 682 #endif /* IPV6_RECVPATHMTU */
 683 #endif /* IPV6_USE_MIN_MTU */
 684
 685 #ifdef IPSEC
 686 #ifdef IPSEC_POLICY_IPSEC
 687         if (options & F_POLICY) {
 688                 if (setpolicy(s, policy_in) < 0)
 689                         errx(1, "%s", ipsec_strerror());
 690                 if (setpolicy(s, policy_out) < 0)
 691                         errx(1, "%s", ipsec_strerror());
 692         }
 693 #else
 694         if (options & F_AUTHHDR) {
 695                 optval = IPSEC_LEVEL_REQUIRE;
 696 #ifdef IPV6_AUTH_TRANS_LEVEL
 697                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 698                     &optval, sizeof(optval)) == -1)
 699                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 700 #else /* old def */
 701                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 702                     &optval, sizeof(optval)) == -1)
 703                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 704 #endif
 705         }
 706         if (options & F_ENCRYPT) {
 707                 optval = IPSEC_LEVEL_REQUIRE;
 708                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 709                     &optval, sizeof(optval)) == -1)
 710                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 711         }
 712 #endif /*IPSEC_POLICY_IPSEC*/
 713 #endif
 714
 715 #ifdef ICMP6_FILTER
 716     {
 717         struct icmp6_filter filt;
 718         if (!(options & F_VERBOSE)) {
 719                 ICMP6_FILTER_SETBLOCKALL(&filt);
 720                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 721                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 722                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 723                 else
 724                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 725         } else {
 726                 ICMP6_FILTER_SETPASSALL(&filt);
 727         }
 728         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 729             sizeof(filt)) < 0)
 730                 err(1, "setsockopt(ICMP6_FILTER)");
 731     }
 732 #endif /*ICMP6_FILTER*/
 733
 734         /* let the kerel pass extension headers of incoming packets */
 735         if ((options & F_VERBOSE) != 0) {
 736                 int opton = 1;
 737
 738 #ifdef IPV6_RECVRTHDR
 739                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 740                     sizeof(opton)))
 741                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 742 #else  /* old adv. API */
 743                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 744                     sizeof(opton)))
 745                         err(1, "setsockopt(IPV6_RTHDR)");
 746 #endif
 747         }
 748
 749 /*
 750         optval = 1;
 751         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 752                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 753                     &optval, sizeof(optval)) == -1)
 754                         err(1, "IPV6_MULTICAST_LOOP");
 755 */
 756
 757         /* Specify the outgoing interface and/or the source address */
 758         if (usepktinfo)
 759                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 760
 761         if (hoplimit != -1)
 762                 ip6optlen += CMSG_SPACE(sizeof(int));
 763
 764 #ifdef IPV6_REACHCONF
 765         if (options & F_REACHCONF)
 766                 ip6optlen += CMSG_SPACE(0);
 767 #endif
 768
 769         /* set IP6 packet options */
 770         if (ip6optlen) {
 771                 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
 772                         errx(1, "can't allocate enough memory");
 773                 smsghdr.msg_control = (caddr_t)scmsg;
 774                 smsghdr.msg_controllen = ip6optlen;
 775                 scmsgp = (struct cmsghdr *)scmsg;
 776         }
 777         if (usepktinfo) {
 778                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 779                 memset(pktinfo, 0, sizeof(*pktinfo));
 780                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 781                 scmsgp->cmsg_level = IPPROTO_IPV6;
 782                 scmsgp->cmsg_type = IPV6_PKTINFO;
 783                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 784         }
 785
 786         /* set the outgoing interface */
 787         if (ifname) {
 788 #ifndef USE_SIN6_SCOPE_ID
 789                 /* pktinfo must have already been allocated */
 790                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 791                         errx(1, "%s: invalid interface name", ifname);
 792 #else
 793                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 794                         errx(1, "%s: invalid interface name", ifname);
 795 #endif
 796         }
 797         /* set the source address */
 798         if (options & F_SRCADDR)/* pktinfo must be valid */
 799                 pktinfo->ipi6_addr = srcaddr;
 800
 801         if (hoplimit != -1) {
 802                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 803                 scmsgp->cmsg_level = IPPROTO_IPV6;
 804                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 805                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 806
 807                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 808         }
 809 #ifdef IPV6_REACHCONF
 810         if (options & F_REACHCONF) {
 811                 scmsgp->cmsg_len = CMSG_LEN(0);
 812                 scmsgp->cmsg_level = IPPROTO_IPV6;
 813                 scmsgp->cmsg_type = IPV6_REACHCONF;
 814
 815                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 816         }
 817 #endif
 818
 819         if (argc > 1) { /* some intermediate addrs are specified */
 820                 int hops, error;
 821 #ifdef USE_RFC2292BIS
 822                 int rthdrlen;
 823 #endif
 824
 825 #ifdef USE_RFC2292BIS
 826                 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
 827                 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
 828                 scmsgp->cmsg_level = IPPROTO_IPV6;
 829                 scmsgp->cmsg_type = IPV6_RTHDR;
 830                 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
 831                 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
 832                     IPV6_RTHDR_TYPE_0, argc - 1);
 833                 if (rthdr == NULL)
 834                         errx(1, "can't initialize rthdr");
 835 #else  /* old advanced API */
 836                 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
 837                     IPV6_RTHDR_TYPE_0)) == 0)
 838                         errx(1, "can't initialize rthdr");
 839 #endif /* USE_RFC2292BIS */
 840
 841                 for (hops = 0; hops < argc - 1; hops++) {
 842                         struct addrinfo *iaip;
 843
 844                         if ((error = getaddrinfo(argv[hops], NULL, &hints,
 845                             &iaip)))
 846                                 errx(1, "%s", gai_strerror(error));
 847                         if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6)
 848                                 errx(1,
 849                                     "bad addr family of an intermediate addr");
 850
 851 #ifdef USE_RFC2292BIS
 852                         if (inet6_rth_add(rthdr,
 853                             &(SIN6(iaip->ai_addr))->sin6_addr))
 854                                 errx(1, "can't add an intermediate node");
 855 #else  /* old advanced API */
 856                         if (inet6_rthdr_add(scmsgp,
 857                             &(SIN6(iaip->ai_addr))->sin6_addr,
 858                             IPV6_RTHDR_LOOSE))
 859                                 errx(1, "can't add an intermediate node");
 860 #endif /* USE_RFC2292BIS */
 861                         freeaddrinfo(iaip);
 862                 }
 863
 864 #ifndef USE_RFC2292BIS
 865                 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
 866                         errx(1, "can't set the last flag");
 867 #endif
 868
 869                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 870         }
 871
 872         {
 873                 /*
 874                  * source selection
 875                  */
 876                 int dummy, len = sizeof(src);
 877
 878                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 879                         err(1, "UDP socket");
 880
 881                 src.sin6_family = AF_INET6;
 882                 src.sin6_addr = dst.sin6_addr;
 883                 src.sin6_port = ntohs(DUMMY_PORT);
 884                 src.sin6_scope_id = dst.sin6_scope_id;
 885
 886 #ifdef USE_RFC2292BIS
 887                 if (pktinfo &&
 888                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 889                     (void *)pktinfo, sizeof(*pktinfo)))
 890                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 891
 892                 if (hoplimit != -1 &&
 893                     setsockopt(dummy, IPPROTO_IPV6, IPV6_HOPLIMIT,
 894                     (void *)&hoplimit, sizeof(hoplimit)))
 895                         err(1, "UDP setsockopt(IPV6_HOPLIMIT)");
 896
 897                 if (rthdr &&
 898                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
 899                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
 900                         err(1, "UDP setsockopt(IPV6_RTHDR)");
 901 #else  /* old advanced API */
 902                 if (smsghdr.msg_control &&
 903                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
 904                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
 905                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
 906 #endif
 907
 908                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
 909                         err(1, "UDP connect");
 910
 911                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
 912                         err(1, "getsockname");
 913
 914                 close(dummy);
 915         }
 916
 917 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 918         if (sockbufsize) {
 919                 if (datalen > sockbufsize)
 920                         warnx("you need -b to increase socket buffer size");
 921                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
 922                     sizeof(sockbufsize)) < 0)
 923                         err(1, "setsockopt(SO_SNDBUF)");
 924                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
 925                     sizeof(sockbufsize)) < 0)
 926                         err(1, "setsockopt(SO_RCVBUF)");
 927         }
 928         else {
 929                 if (datalen > 8 * 1024) /*XXX*/
 930                         warnx("you need -b to increase socket buffer size");
 931                 /*
 932                  * When pinging the broadcast address, you can get a lot of
 933                  * answers. Doing something so evil is useful if you are trying
 934                  * to stress the ethernet, or just want to fill the arp cache
 935                  * to get some stuff for /etc/ethers.
 936                  */
 937                 hold = 48 * 1024;
 938                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
 939                     sizeof(hold));
 940         }
 941 #endif
 942
 943         optval = 1;
 944 #ifndef USE_SIN6_SCOPE_ID
 945 #ifdef IPV6_RECVPKTINFO
 946         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
 947             sizeof(optval)) < 0)
 948                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
 949 #else  /* old adv. API */
 950         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
 951             sizeof(optval)) < 0)
 952                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
 953 #endif
 954 #endif /* USE_SIN6_SCOPE_ID */
 955 #ifdef IPV6_RECVHOPLIMIT
 956         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
 957             sizeof(optval)) < 0)
 958                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
 959 #else  /* old adv. API */
 960         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
 961             sizeof(optval)) < 0)
 962                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
 963 #endif
 964
 965         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
 966             (unsigned long)(pingerlen() - 8));
 967         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
 968         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
 969
 970         while (preload--)               /* Fire off them quickies. */
 971                 (void)pinger();
 972
 973         (void)signal(SIGINT, onsignal);
 974 #ifdef SIGINFO
 975         (void)signal(SIGINFO, onsignal);
 976 #endif
 977
 978         if ((options & F_FLOOD) == 0) {
 979                 (void)signal(SIGALRM, onsignal);
 980                 itimer.it_interval = interval;
 981                 itimer.it_value = interval;
 982                 (void)setitimer(ITIMER_REAL, &itimer, NULL);
 983                 if (ntransmitted == 0)
 984                         retransmit();
 985         }
 986
 987         fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
 988         if ((fdmaskp = malloc(fdmasks)) == NULL)
 989                 err(1, "malloc");
 990
 991         signo = seenalrm = seenint = 0;
 992 #ifdef SIGINFO
 993         seeninfo = 0;
 994 #endif
 995
 996         for (;;) {
 997                 struct msghdr m;
 998                 struct cmsghdr *cm;
 999                 u_char buf[1024];
1000                 struct iovec iov[2];
1001
1002                 /* signal handling */
1003                 if (seenalrm) {
1004                         retransmit();
1005                         seenalrm = 0;
1006                         continue;
1007                 }
1008                 if (seenint) {
1009                         onint(SIGINT);
1010                         seenint = 0;
1011                         continue;
1012                 }
1013 #ifdef SIGINFO
1014                 if (seeninfo) {
1015                         summary();
1016                         seeninfo = 0;
1017                         continue;
1018                 }
1019 #endif
1020
1021                 if (options & F_FLOOD) {
1022                         (void)pinger();
1023                         timeout.tv_sec = 0;
1024                         timeout.tv_usec = 10000;
1025                         tv = &timeout;
1026                 } else
1027                         tv = NULL;
1028                 memset(fdmaskp, 0, fdmasks);
1029                 FD_SET(s, fdmaskp);
1030                 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1031                 if (cc < 0) {
1032                         if (errno != EINTR) {
1033                                 warn("select");
1034                                 sleep(1);
1035                         }
1036                         continue;
1037                 } else if (cc == 0)
1038                         continue;
1039
1040                 fromlen = sizeof(from);
1041                 m.msg_name = (caddr_t)&from;
1042                 m.msg_namelen = sizeof(from);
1043                 memset(&iov, 0, sizeof(iov));
1044                 iov[0].iov_base = (caddr_t)packet;
1045                 iov[0].iov_len = packlen;
1046                 m.msg_iov = iov;
1047                 m.msg_iovlen = 1;
1048                 cm = (struct cmsghdr *)buf;
1049                 m.msg_control = (caddr_t)buf;
1050                 m.msg_controllen = sizeof(buf);
1051
1052                 cc = recvmsg(s, &m, 0);
1053                 if (cc < 0) {
1054                         if (errno != EINTR) {
1055                                 warn("recvmsg");
1056                                 sleep(1);
1057                         }
1058                         continue;
1059                 } else if (cc == 0) {
1060                         int mtu;
1061
1062                         /*
1063                          * receive control messages only. Process the
1064                          * exceptions (currently the only possiblity is
1065                          * a path MTU notification.)
1066                          */
1067                         if ((mtu = get_pathmtu(&m)) > 0) {
1068                                 if ((options & F_VERBOSE) != 0) {
1069                                         printf("new path MTU (%d) is "
1070                                             "notified\n", mtu);
1071                                 }
1072                                 set_pathmtu(mtu);
1073                         }
1074                         continue;
1075                 } else {
1076                         /*
1077                          * an ICMPv6 message (probably an echoreply) arrived.
1078                          */
1079                         pr_pack(packet, cc, &m);
1080                 }
1081                 if (npackets && nreceived >= npackets)
1082                         break;
1083         }
1084         summary();
1085         exit(nreceived == 0);
1086 }
1087
1088 void
1089 onsignal(int sig)
1090 {
1091         signo = sig;
1092         switch (sig) {
1093         case SIGALRM:
1094                 seenalrm++;
1095                 break;
1096         case SIGINT:
1097                 seenint++;
1098                 break;
1099 #ifdef SIGINFO
1100         case SIGINFO:
1101                 seeninfo++;
1102                 break;
1103 #endif
1104         }
1105 }
1106
1107 /*
1108  * retransmit --
1109  *      This routine transmits another ping6.
1110  */
1111 void
1112 retransmit(void)
1113 {
1114         struct itimerval itimer;
1115
1116         if (pinger() == 0)
1117                 return;
1118
1119         /*
1120          * If we're not transmitting any more packets, change the timer
1121          * to wait two round-trip times if we've received any packets or
1122          * ten seconds if we haven't.
1123          */
1124 #define MAXWAIT         10
1125         if (nreceived) {
1126                 itimer.it_value.tv_sec =  2 * tmax / 1000;
1127                 if (itimer.it_value.tv_sec == 0)
1128                         itimer.it_value.tv_sec = 1;
1129         } else
1130                 itimer.it_value.tv_sec = MAXWAIT;
1131         itimer.it_interval.tv_sec = 0;
1132         itimer.it_interval.tv_usec = 0;
1133         itimer.it_value.tv_usec = 0;
1134
1135         (void)signal(SIGALRM, onint);
1136         (void)setitimer(ITIMER_REAL, &itimer, NULL);
1137 }
1138
1139 /*
1140  * pinger --
1141  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1142  * will be added on by the kernel.  The ID field is our UNIX process ID,
1143  * and the sequence number is an ascending integer.  The first 8 bytes
1144  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1145  * byte-order, to compute the round-trip time.
1146  */
1147 size_t
1148 pingerlen(void)
1149 {
1150         size_t l;
1151
1152         if (options & F_FQDN)
1153                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1154         else if (options & F_FQDNOLD)
1155                 l = ICMP6_NIQLEN;
1156         else if (options & F_NODEADDR)
1157                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1158         else if (options & F_SUPTYPES)
1159                 l = ICMP6_NIQLEN;
1160         else
1161                 l = ICMP6ECHOLEN + datalen;
1162
1163         return l;
1164 }
1165
1166 int
1167 pinger(void)
1168 {
1169         struct icmp6_hdr *icp;
1170         struct iovec iov[2];
1171         int i, cc;
1172         struct icmp6_nodeinfo *nip;
1173         int seq;
1174
1175         if (npackets && ntransmitted >= npackets)
1176                 return(-1);     /* no more transmission */
1177
1178         icp = (struct icmp6_hdr *)outpack;
1179         nip = (struct icmp6_nodeinfo *)outpack;
1180         memset(icp, 0, sizeof(*icp));
1181         icp->icmp6_cksum = 0;
1182         seq = ntransmitted++;
1183         CLR(seq % mx_dup_ck);
1184
1185         if (options & F_FQDN) {
1186                 icp->icmp6_type = ICMP6_NI_QUERY;
1187                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1188                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1189                 nip->ni_flags = htons(0);
1190
1191                 memcpy(nip->icmp6_ni_nonce, nonce,
1192                     sizeof(nip->icmp6_ni_nonce));
1193                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1194
1195                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1196                     sizeof(dst.sin6_addr));
1197                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1198                 datalen = 0;
1199         } else if (options & F_FQDNOLD) {
1200                 /* packet format in 03 draft - no Subject data on queries */
1201                 icp->icmp6_type = ICMP6_NI_QUERY;
1202                 icp->icmp6_code = 0;    /* code field is always 0 */
1203                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1204                 nip->ni_flags = htons(0);
1205
1206                 memcpy(nip->icmp6_ni_nonce, nonce,
1207                     sizeof(nip->icmp6_ni_nonce));
1208                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1209
1210                 cc = ICMP6_NIQLEN;
1211                 datalen = 0;
1212         } else if (options & F_NODEADDR) {
1213                 icp->icmp6_type = ICMP6_NI_QUERY;
1214                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1215                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1216                 nip->ni_flags = naflags;
1217
1218                 memcpy(nip->icmp6_ni_nonce, nonce,
1219                     sizeof(nip->icmp6_ni_nonce));
1220                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1221
1222                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1223                     sizeof(dst.sin6_addr));
1224                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1225                 datalen = 0;
1226         } else if (options & F_SUPTYPES) {
1227                 icp->icmp6_type = ICMP6_NI_QUERY;
1228                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1229                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1230                 /* we support compressed bitmap */
1231                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1232
1233                 memcpy(nip->icmp6_ni_nonce, nonce,
1234                     sizeof(nip->icmp6_ni_nonce));
1235                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1236                 cc = ICMP6_NIQLEN;
1237                 datalen = 0;
1238         } else {
1239                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1240                 icp->icmp6_code = 0;
1241                 icp->icmp6_id = htons(ident);
1242                 icp->icmp6_seq = ntohs(seq);
1243                 if (timing)
1244                         (void)gettimeofday((struct timeval *)
1245                                            &outpack[ICMP6ECHOLEN], NULL);
1246                 cc = ICMP6ECHOLEN + datalen;
1247         }
1248
1249 #ifdef DIAGNOSTIC
1250         if (pingerlen() != cc)
1251                 errx(1, "internal error; length mismatch");
1252 #endif
1253
1254         smsghdr.msg_name = (caddr_t)&dst;
1255         smsghdr.msg_namelen = sizeof(dst);
1256         memset(&iov, 0, sizeof(iov));
1257         iov[0].iov_base = (caddr_t)outpack;
1258         iov[0].iov_len = cc;
1259         smsghdr.msg_iov = iov;
1260         smsghdr.msg_iovlen = 1;
1261
1262         i = sendmsg(s, &smsghdr, 0);
1263
1264         if (i < 0 || i != cc)  {
1265                 if (i < 0)
1266                         warn("sendmsg");
1267                 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1268                     hostname, cc, i);
1269         }
1270         if (!(options & F_QUIET) && options & F_FLOOD)
1271                 (void)write(STDOUT_FILENO, &DOT, 1);
1272
1273         return(0);
1274 }
1275
1276 int
1277 myechoreply(const struct icmp6_hdr *icp)
1278 {
1279         if (ntohs(icp->icmp6_id) == ident)
1280                 return 1;
1281         else
1282                 return 0;
1283 }
1284
1285 int
1286 mynireply(const struct icmp6_nodeinfo *nip)
1287 {
1288         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1289             nonce + sizeof(u_int16_t),
1290             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1291                 return 1;
1292         else
1293                 return 0;
1294 }
1295
1296 char *
1297 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, u_char *buf,
1298           size_t bufsiz)
1299 {
1300         int i;
1301         const u_char *cp;
1302         char cresult[MAXDNAME + 1];
1303         const u_char *comp;
1304         int l;
1305
1306         cp = *sp;
1307         *buf = '\0';
1308
1309         if (cp >= ep)
1310                 return NULL;
1311         while (cp < ep) {
1312                 i = *cp;
1313                 if (i == 0 || cp != *sp) {
1314                         if (strlcat(buf, ".", bufsiz) >= bufsiz)
1315                                 return NULL;    /*result overrun*/
1316                 }
1317                 if (i == 0)
1318                         break;
1319                 cp++;
1320
1321                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1322                         /* DNS compression */
1323                         if (!base)
1324                                 return NULL;
1325
1326                         comp = base + (i & 0x3f);
1327                         if (dnsdecode(&comp, cp, base, cresult,
1328                             sizeof(cresult)) == NULL)
1329                                 return NULL;
1330                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1331                                 return NULL;    /*result overrun*/
1332                         break;
1333                 } else if ((i & 0x3f) == i) {
1334                         if (i > ep - cp)
1335                                 return NULL;    /*source overrun*/
1336                         while (i-- > 0 && cp < ep) {
1337                                 l = snprintf(cresult, sizeof(cresult),
1338                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1339                                 if (l >= sizeof(cresult))
1340                                         return NULL;
1341                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1342                                         return NULL;    /*result overrun*/
1343                                 cp++;
1344                         }
1345                 } else
1346                         return NULL;    /*invalid label*/
1347         }
1348         if (i != 0)
1349                 return NULL;    /*not terminated*/
1350         cp++;
1351         *sp = cp;
1352         return buf;
1353 }
1354
1355 /*
1356  * pr_pack --
1357  *      Print out the packet, if it came from us.  This logic is necessary
1358  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1359  * which arrive ('tis only fair).  This permits multiple copies of this
1360  * program to be run without having intermingled output (or statistics!).
1361  */
1362 void
1363 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1364 {
1365 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1366         struct icmp6_hdr *icp;
1367         struct icmp6_nodeinfo *ni;
1368         int i;
1369         int hoplim;
1370         struct sockaddr *from;
1371         int fromlen;
1372         u_char *cp = NULL, *dp, *end = buf + cc;
1373         struct in6_pktinfo *pktinfo = NULL;
1374         struct timeval tv, *tp;
1375         double triptime = 0;
1376         int dupflag;
1377         size_t off;
1378         int oldfqdn;
1379         u_int16_t seq;
1380         char dnsname[MAXDNAME + 1];
1381
1382         (void)gettimeofday(&tv, NULL);
1383
1384         if (!mhdr || !mhdr->msg_name ||
1385             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1386             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1387                 if (options & F_VERBOSE)
1388                         warnx("invalid peername\n");
1389                 return;
1390         }
1391         from = (struct sockaddr *)mhdr->msg_name;
1392         fromlen = mhdr->msg_namelen;
1393         if (cc < sizeof(struct icmp6_hdr)) {
1394                 if (options & F_VERBOSE)
1395                         warnx("packet too short (%d bytes) from %s\n", cc,
1396                             pr_addr(from, fromlen));
1397                 return;
1398         }
1399         icp = (struct icmp6_hdr *)buf;
1400         ni = (struct icmp6_nodeinfo *)buf;
1401         off = 0;
1402
1403         if ((hoplim = get_hoplim(mhdr)) == -1) {
1404                 warnx("failed to get receiving hop limit");
1405                 return;
1406         }
1407         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1408                 warnx("failed to get receiving pakcet information");
1409                 return;
1410         }
1411
1412         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1413                 seq = ntohs(icp->icmp6_seq);
1414                 ++nreceived;
1415                 if (timing) {
1416                         tp = (struct timeval *)(icp + 1);
1417                         tvsub(&tv, tp);
1418                         triptime = ((double)tv.tv_sec) * 1000.0 +
1419                             ((double)tv.tv_usec) / 1000.0;
1420                         tsum += triptime;
1421 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__)
1422                         tsumsq += triptime * triptime;
1423 #endif
1424                         if (triptime < tmin)
1425                                 tmin = triptime;
1426                         if (triptime > tmax)
1427                                 tmax = triptime;
1428                 }
1429
1430                 if (TST(seq % mx_dup_ck)) {
1431                         ++nrepeats;
1432                         --nreceived;
1433                         dupflag = 1;
1434                 } else {
1435                         SET(seq % mx_dup_ck);
1436                         dupflag = 0;
1437                 }
1438
1439                 if (options & F_QUIET)
1440                         return;
1441
1442                 if (options & F_FLOOD)
1443                         (void)write(STDOUT_FILENO, &BSPACE, 1);
1444                 else {
1445                         (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1446                             pr_addr(from, fromlen), seq);
1447                         (void)printf(" hlim=%d", hoplim);
1448                         if ((options & F_VERBOSE) != 0) {
1449                                 struct sockaddr_in6 dstsa;
1450
1451                                 memset(&dstsa, 0, sizeof(dstsa));
1452                                 dstsa.sin6_family = AF_INET6;
1453 #ifdef SIN6_LEN
1454                                 dstsa.sin6_len = sizeof(dstsa);
1455 #endif
1456                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1457                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1458                                 (void)printf(" dst=%s",
1459                                     pr_addr((struct sockaddr *)&dstsa,
1460                                     sizeof(dstsa)));
1461                         }
1462                         if (timing)
1463                                 (void)printf(" time=%g ms", triptime);
1464                         if (dupflag)
1465                                 (void)printf("(DUP!)");
1466                         /* check the data */
1467                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1468                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1469                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1470                                 if (*cp != *dp) {
1471                                         (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1472                                         break;
1473                                 }
1474                         }
1475                 }
1476         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1477                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1478                 ++nreceived;
1479                 if (TST(seq % mx_dup_ck)) {
1480                         ++nrepeats;
1481                         --nreceived;
1482                         dupflag = 1;
1483                 } else {
1484                         SET(seq % mx_dup_ck);
1485                         dupflag = 0;
1486                 }
1487
1488                 if (options & F_QUIET)
1489                         return;
1490
1491                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1492
1493                 switch (ntohs(ni->ni_code)) {
1494                 case ICMP6_NI_SUCCESS:
1495                         break;
1496                 case ICMP6_NI_REFUSED:
1497                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1498                         goto fqdnend;
1499                 case ICMP6_NI_UNKNOWN:
1500                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1501                         goto fqdnend;
1502                 default:
1503                         printf("unknown code 0x%x, type 0x%x",
1504                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1505                         goto fqdnend;
1506                 }
1507
1508                 switch (ntohs(ni->ni_qtype)) {
1509                 case NI_QTYPE_NOOP:
1510                         printf("NodeInfo NOOP");
1511                         break;
1512                 case NI_QTYPE_SUPTYPES:
1513                         pr_suptypes(ni, end - (u_char *)ni);
1514                         break;
1515                 case NI_QTYPE_NODEADDR:
1516                         pr_nodeaddr(ni, end - (u_char *)ni);
1517                         break;
1518                 case NI_QTYPE_FQDN:
1519                 default:        /* XXX: for backward compatibility */
1520                         cp = (u_char *)ni + ICMP6_NIRLEN;
1521                         if (buf[off + ICMP6_NIRLEN] ==
1522                             cc - off - ICMP6_NIRLEN - 1)
1523                                 oldfqdn = 1;
1524                         else
1525                                 oldfqdn = 0;
1526                         if (oldfqdn) {
1527                                 cp++;   /* skip length */
1528                                 while (cp < end) {
1529                                         safeputc(*cp & 0xff);
1530                                         cp++;
1531                                 }
1532                         } else {
1533                                 i = 0;
1534                                 while (cp < end) {
1535                                         if (dnsdecode((const u_char **)&cp, end,
1536                                             (const u_char *)(ni + 1), dnsname,
1537                                             sizeof(dnsname)) == NULL) {
1538                                                 printf("???");
1539                                                 break;
1540                                         }
1541                                         /*
1542                                          * name-lookup special handling for
1543                                          * truncated name
1544                                          */
1545                                         if (cp + 1 <= end && !*cp &&
1546                                             strlen(dnsname) > 0) {
1547                                                 dnsname[strlen(dnsname) - 1] = '\0';
1548                                                 cp++;
1549                                         }
1550                                         printf("%s%s", i > 0 ? "," : "",
1551                                             dnsname);
1552                                 }
1553                         }
1554                         if (options & F_VERBOSE) {
1555                                 int32_t ttl;
1556                                 int comma = 0;
1557
1558                                 (void)printf(" (");     /*)*/
1559
1560                                 switch (ni->ni_code) {
1561                                 case ICMP6_NI_REFUSED:
1562                                         (void)printf("refused");
1563                                         comma++;
1564                                         break;
1565                                 case ICMP6_NI_UNKNOWN:
1566                                         (void)printf("unknwon qtype");
1567                                         comma++;
1568                                         break;
1569                                 }
1570
1571                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1572                                         /* case of refusion, unknown */
1573                                         /*(*/
1574                                         putchar(')');
1575                                         goto fqdnend;
1576                                 }
1577                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1578                                 if (comma)
1579                                         printf(",");
1580                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1581                                         (void)printf("TTL=%d:meaningless",
1582                                             (int)ttl);
1583                                 } else {
1584                                         if (ttl < 0) {
1585                                                 (void)printf("TTL=%d:invalid",
1586                                                    ttl);
1587                                         } else
1588                                                 (void)printf("TTL=%d", ttl);
1589                                 }
1590                                 comma++;
1591
1592                                 if (oldfqdn) {
1593                                         if (comma)
1594                                                 printf(",");
1595                                         printf("03 draft");
1596                                         comma++;
1597                                 } else {
1598                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1599                                         if (cp == end) {
1600                                                 if (comma)
1601                                                         printf(",");
1602                                                 printf("no name");
1603                                                 comma++;
1604                                         }
1605                                 }
1606
1607                                 if (buf[off + ICMP6_NIRLEN] !=
1608                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1609                                         if (comma)
1610                                                 printf(",");
1611                                         (void)printf("invalid namelen:%d/%lu",
1612                                             buf[off + ICMP6_NIRLEN],
1613                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1614                                         comma++;
1615                                 }
1616                                 /*(*/
1617                                 putchar(')');
1618                         }
1619                 fqdnend:
1620                         ;
1621                 }
1622         } else {
1623                 /* We've got something other than an ECHOREPLY */
1624                 if (!(options & F_VERBOSE))
1625                         return;
1626                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1627                 pr_icmph(icp, end);
1628         }
1629
1630         if (!(options & F_FLOOD)) {
1631                 (void)putchar('\n');
1632                 if (options & F_VERBOSE)
1633                         pr_exthdrs(mhdr);
1634                 (void)fflush(stdout);
1635         }
1636 #undef safeputc
1637 }
1638
1639 void
1640 pr_exthdrs(struct msghdr *mhdr)
1641 {
1642         struct cmsghdr *cm;
1643
1644         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1645              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1646                 if (cm->cmsg_level != IPPROTO_IPV6)
1647                         continue;
1648
1649                 switch (cm->cmsg_type) {
1650                 case IPV6_HOPOPTS:
1651                         printf("  HbH Options: ");
1652                         pr_ip6opt(CMSG_DATA(cm));
1653                         break;
1654                 case IPV6_DSTOPTS:
1655 #ifdef IPV6_RTHDRDSTOPTS
1656                 case IPV6_RTHDRDSTOPTS:
1657 #endif
1658                         printf("  Dst Options: ");
1659                         pr_ip6opt(CMSG_DATA(cm));
1660                         break;
1661                 case IPV6_RTHDR:
1662                         printf("  Routing: ");
1663                         pr_rthdr(CMSG_DATA(cm));
1664                         break;
1665                 }
1666         }
1667 }
1668
1669 #ifdef USE_RFC2292BIS
1670 void
1671 pr_ip6opt(void *extbuf)
1672 {
1673         struct ip6_hbh *ext;
1674         int currentlen;
1675         u_int8_t type;
1676         size_t extlen, len;
1677         void *databuf;
1678         size_t offset;
1679         u_int16_t value2;
1680         u_int32_t value4;
1681
1682         ext = (struct ip6_hbh *)extbuf;
1683         extlen = (ext->ip6h_len + 1) * 8;
1684         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1685             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1686
1687         currentlen = 0;
1688         while (1) {
1689                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1690                     &type, &len, &databuf);
1691                 if (currentlen == -1)
1692                         break;
1693                 switch (type) {
1694                 /*
1695                  * Note that inet6_opt_next automatically skips any padding
1696                  * optins.
1697                  */
1698                 case IP6OPT_JUMBO:
1699                         offset = 0;
1700                         offset = inet6_opt_get_val(databuf, offset,
1701                             &value4, sizeof(value4));
1702                         printf("    Jumbo Payload Opt: Length %u\n",
1703                             (u_int32_t)ntohl(value4));
1704                         break;
1705                 case IP6OPT_ROUTER_ALERT:
1706                         offset = 0;
1707                         offset = inet6_opt_get_val(databuf, offset,
1708                                                    &value2, sizeof(value2));
1709                         printf("    Router Alert Opt: Type %u\n",
1710                             ntohs(value2));
1711                         break;
1712                 default:
1713                         printf("    Received Opt %u len %lu\n",
1714                             type, (unsigned long)len);
1715                         break;
1716                 }
1717         }
1718         return;
1719 }
1720 #else  /* !USE_RFC2292BIS */
1721 /* ARGSUSED */
1722 void
1723 pr_ip6opt(void *extbuf)
1724 {
1725         putchar('\n');
1726         return;
1727 }
1728 #endif /* USE_RFC2292BIS */
1729
1730 #ifdef USE_RFC2292BIS
1731 void
1732 pr_rthdr(void *extbuf)
1733 {
1734         struct in6_addr *in6;
1735         char ntopbuf[INET6_ADDRSTRLEN];
1736         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1737         int i, segments;
1738
1739         /* print fixed part of the header */
1740         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1741             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1742         if ((segments = inet6_rth_segments(extbuf)) >= 0)
1743                 printf("%d segments, ", segments);
1744         else
1745                 printf("segments unknown, ");
1746         printf("%d left\n", rh->ip6r_segleft);
1747
1748         for (i = 0; i < segments; i++) {
1749                 in6 = inet6_rth_getaddr(extbuf, i);
1750                 if (in6 == NULL)
1751                         printf("   [%d]<NULL>\n", i);
1752                 else {
1753                         if (!inet_ntop(AF_INET6, in6, ntopbuf,
1754                             sizeof(ntopbuf)))
1755                                 strncpy(ntopbuf, "?", sizeof(ntopbuf));
1756                         printf("   [%d]%s\n", i, ntopbuf);
1757                 }
1758         }
1759
1760         return;
1761
1762 }
1763
1764 #else  /* !USE_RFC2292BIS */
1765 /* ARGSUSED */
1766 void
1767 pr_rthdr(void *extbuf)
1768 {
1769         putchar('\n');
1770         return;
1771 }
1772 #endif /* USE_RFC2292BIS */
1773
1774 int
1775 pr_bitrange(u_int32_t v, int s, int ii)
1776 {
1777         int off;
1778         int i;
1779
1780         off = 0;
1781         while (off < 32) {
1782                 /* shift till we have 0x01 */
1783                 if ((v & 0x01) == 0) {
1784                         if (ii > 1)
1785                                 printf("-%u", s + off - 1);
1786                         ii = 0;
1787                         switch (v & 0x0f) {
1788                         case 0x00:
1789                                 v >>= 4;
1790                                 off += 4;
1791                                 continue;
1792                         case 0x08:
1793                                 v >>= 3;
1794                                 off += 3;
1795                                 continue;
1796                         case 0x04: case 0x0c:
1797                                 v >>= 2;
1798                                 off += 2;
1799                                 continue;
1800                         default:
1801                                 v >>= 1;
1802                                 off += 1;
1803                                 continue;
1804                         }
1805                 }
1806
1807                 /* we have 0x01 with us */
1808                 for (i = 0; i < 32 - off; i++) {
1809                         if ((v & (0x01 << i)) == 0)
1810                                 break;
1811                 }
1812                 if (!ii)
1813                         printf(" %u", s + off);
1814                 ii += i;
1815                 v >>= i; off += i;
1816         }
1817         return ii;
1818 }
1819
1820 /* struct icmp6_nodeinfo *ni:   ni->qtype must be SUPTYPES */
1821 void
1822 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1823 {
1824         size_t clen;
1825         u_int32_t v;
1826         const u_char *cp, *end;
1827         u_int16_t cur;
1828         struct cbit {
1829                 u_int16_t words;        /*32bit count*/
1830                 u_int16_t skip;
1831         } cbit;
1832 #define MAXQTYPES       (1 << 16)
1833         size_t off;
1834         int b;
1835
1836         cp = (u_char *)(ni + 1);
1837         end = ((u_char *)ni) + nilen;
1838         cur = 0;
1839         b = 0;
1840
1841         printf("NodeInfo Supported Qtypes");
1842         if (options & F_VERBOSE) {
1843                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
1844                         printf(", compressed bitmap");
1845                 else
1846                         printf(", raw bitmap");
1847         }
1848
1849         while (cp < end) {
1850                 clen = (size_t)(end - cp);
1851                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
1852                         if (clen == 0 || clen > MAXQTYPES / 8 ||
1853                             clen % sizeof(v)) {
1854                                 printf("???");
1855                                 return;
1856                         }
1857                 } else {
1858                         if (clen < sizeof(cbit) || clen % sizeof(v))
1859                                 return;
1860                         memcpy(&cbit, cp, sizeof(cbit));
1861                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
1862                             clen)
1863                                 return;
1864                         cp += sizeof(cbit);
1865                         clen = ntohs(cbit.words) * sizeof(v);
1866                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
1867                             MAXQTYPES)
1868                                 return;
1869                 }
1870
1871                 for (off = 0; off < clen; off += sizeof(v)) {
1872                         memcpy(&v, cp + off, sizeof(v));
1873                         v = (u_int32_t)ntohl(v);
1874                         b = pr_bitrange(v, (int)(cur + off * 8), b);
1875                 }
1876                 /* flush the remaining bits */
1877                 b = pr_bitrange(0, (int)(cur + off * 8), b);
1878
1879                 cp += clen;
1880                 cur += clen * 8;
1881                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
1882                         cur += ntohs(cbit.skip) * 32;
1883         }
1884 }
1885
1886 /* struct icmp6_nodeinfo *ni:   ni->qtype must be NODEADDR */
1887 void
1888 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
1889 {
1890         u_char *cp = (u_char *)(ni + 1);
1891         char ntop_buf[INET6_ADDRSTRLEN];
1892         int withttl = 0;
1893
1894         nilen -= sizeof(struct icmp6_nodeinfo);
1895
1896         if (options & F_VERBOSE) {
1897                 switch (ni->ni_code) {
1898                 case ICMP6_NI_REFUSED:
1899                         (void)printf("refused");
1900                         break;
1901                 case ICMP6_NI_UNKNOWN:
1902                         (void)printf("unknown qtype");
1903                         break;
1904                 }
1905                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
1906                         (void)printf(" truncated");
1907         }
1908         putchar('\n');
1909         if (nilen <= 0)
1910                 printf("  no address\n");
1911
1912         /*
1913          * In icmp-name-lookups 05 and later, TTL of each returned address
1914          * is contained in the resposne. We try to detect the version
1915          * by the length of the data, but note that the detection algorithm
1916          * is incomplete. We assume the latest draft by default.
1917          */
1918         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
1919                 withttl = 1;
1920         while (nilen > 0) {
1921                 u_int32_t ttl = 0;
1922
1923                 if (withttl) {
1924                         /* XXX: alignment? */
1925                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
1926                         cp += sizeof(u_int32_t);
1927                         nilen -= sizeof(u_int32_t);
1928                 }
1929
1930                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
1931                     NULL)
1932                         strncpy(ntop_buf, "?", sizeof(ntop_buf));
1933                 printf("  %s", ntop_buf);
1934                 if (withttl) {
1935                         if (ttl == 0xffffffff) {
1936                                 /*
1937                                  * XXX: can this convention be applied to all
1938                                  * type of TTL (i.e. non-ND TTL)?
1939                                  */
1940                                 printf("(TTL=infty)");
1941                         }
1942                         else
1943                                 printf("(TTL=%u)", ttl);
1944                 }
1945                 putchar('\n');
1946
1947                 nilen -= sizeof(struct in6_addr);
1948                 cp += sizeof(struct in6_addr);
1949         }
1950 }
1951
1952 int
1953 get_hoplim(struct msghdr *mhdr)
1954 {
1955         struct cmsghdr *cm;
1956
1957         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1958              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1959                 if (cm->cmsg_len == 0)
1960                         return(-1);
1961
1962                 if (cm->cmsg_level == IPPROTO_IPV6 &&
1963                     cm->cmsg_type == IPV6_HOPLIMIT &&
1964                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
1965                         return(*(int *)CMSG_DATA(cm));
1966         }
1967
1968         return(-1);
1969 }
1970
1971 struct in6_pktinfo *
1972 get_rcvpktinfo(struct msghdr *mhdr)
1973 {
1974         struct cmsghdr *cm;
1975
1976         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1977              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1978                 if (cm->cmsg_len == 0)
1979                         return(NULL);
1980
1981                 if (cm->cmsg_level == IPPROTO_IPV6 &&
1982                     cm->cmsg_type == IPV6_PKTINFO &&
1983                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
1984                         return((struct in6_pktinfo *)CMSG_DATA(cm));
1985         }
1986
1987         return(NULL);
1988 }
1989
1990 int
1991 get_pathmtu(struct msghdr *mhdr)
1992 {
1993 #ifdef IPV6_RECVPATHMTU
1994         struct cmsghdr *cm;
1995         struct ip6_mtuinfo *mtuctl = NULL;
1996
1997         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1998              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1999                 if (cm->cmsg_len == 0)
2000                         return(0);
2001
2002                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2003                     cm->cmsg_type == IPV6_PATHMTU &&
2004                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2005                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2006
2007                         /*
2008                          * If the notified destination is different from
2009                          * the one we are pinging, just ignore the info.
2010                          * We check the scope ID only when both notified value
2011                          * and our own value have non-0 values, because we may
2012                          * have used the default scope zone ID for sending,
2013                          * in which case the scope ID value is 0.
2014                          */
2015                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2016                                                 &dst.sin6_addr) ||
2017                             (mtuctl->ip6m_addr.sin6_scope_id &&
2018                              dst.sin6_scope_id &&
2019                              mtuctl->ip6m_addr.sin6_scope_id !=
2020                              dst.sin6_scope_id)) {
2021                                 if ((options & F_VERBOSE) != 0) {
2022                                         printf("path MTU for %s is notified. "
2023                                                "(ignored)\n",
2024                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2025                                            sizeof(mtuctl->ip6m_addr)));
2026                                 }
2027                                 return(0);
2028                         }
2029
2030                         /*
2031                          * Ignore an invalid MTU. XXX: can we just believe
2032                          * the kernel check?
2033                          */
2034                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2035                                 return(0);
2036
2037                         /* notification for our destination. return the MTU. */
2038                         return((int)mtuctl->ip6m_mtu);
2039                 }
2040         }
2041 #endif
2042         return(0);
2043 }
2044
2045 void
2046 set_pathmtu(int mtu)
2047 {
2048 #ifdef IPV6_USE_MTU
2049         static int firsttime = 1;
2050         struct cmsghdr *cm;
2051
2052         if (firsttime) {
2053                 int oldlen = smsghdr.msg_controllen;
2054                 char *oldbuf = smsghdr.msg_control;
2055
2056                 /* XXX: We need to enlarge control message buffer */
2057                 firsttime = 0;  /* prevent further enlargement */
2058
2059                 smsghdr.msg_controllen = oldlen + CMSG_SPACE(sizeof(int));
2060                 if ((smsghdr.msg_control =
2061                      (char *)malloc(smsghdr.msg_controllen)) == NULL)
2062                         err(1, "set_pathmtu: malloc");
2063                 cm = (struct cmsghdr *)CMSG_FIRSTHDR(&smsghdr);
2064                 cm->cmsg_len = CMSG_LEN(sizeof(int));
2065                 cm->cmsg_level = IPPROTO_IPV6;
2066                 cm->cmsg_type = IPV6_USE_MTU;
2067
2068                 cm = (struct cmsghdr *)CMSG_NXTHDR(&smsghdr, cm);
2069                 if (oldlen)
2070                         memcpy((void *)cm, (void *)oldbuf, oldlen);
2071
2072                 free(oldbuf);
2073         }
2074
2075         /*
2076          * look for a cmsgptr that points MTU structure.
2077          * XXX: this procedure seems redundant at this moment, but we'd better
2078          * keep the code generic enough for future extensions.
2079          */
2080         for (cm = CMSG_FIRSTHDR(&smsghdr); cm;
2081              cm = (struct cmsghdr *)CMSG_NXTHDR(&smsghdr, cm)) {
2082                 if (cm->cmsg_len == 0) /* XXX: paranoid check */
2083                         errx(1, "set_pathmtu: internal error");
2084
2085                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2086                     cm->cmsg_type == IPV6_USE_MTU &&
2087                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
2088                         break;
2089         }
2090
2091         if (cm == NULL)
2092                 errx(1, "set_pathmtu: internal error: no space for path MTU");
2093
2094         *(int *)CMSG_DATA(cm) = mtu;
2095 #endif
2096 }
2097
2098 /*
2099  * tvsub --
2100  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2101  * be >= in.
2102  */
2103 void
2104 tvsub(register struct timeval *out, register struct timeval *in)
2105 {
2106         if ((out->tv_usec -= in->tv_usec) < 0) {
2107                 --out->tv_sec;
2108                 out->tv_usec += 1000000;
2109         }
2110         out->tv_sec -= in->tv_sec;
2111 }
2112
2113 /*
2114  * onint --
2115  *      SIGINT handler.
2116  */
2117 /* ARGSUSED */
2118 void
2119 onint(int notused)
2120 {
2121         (void)signal(SIGINT, SIG_IGN);
2122         (void)signal(SIGALRM, SIG_IGN);
2123
2124         summary();
2125
2126         exit(nreceived == 0);
2127 }
2128
2129 /*
2130  * summary --
2131  *      Print out statistics.
2132  */
2133 void
2134 summary(void)
2135 {
2136
2137         (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2138         (void)printf("%ld packets transmitted, ", ntransmitted);
2139         (void)printf("%ld packets received, ", nreceived);
2140         if (nrepeats)
2141                 (void)printf("+%ld duplicates, ", nrepeats);
2142         if (ntransmitted) {
2143                 if (nreceived > ntransmitted)
2144                         (void)printf("-- somebody's printing up packets!");
2145                 else
2146                         (void)printf("%d%% packet loss",
2147                             (int) (((ntransmitted - nreceived) * 100) /
2148                             ntransmitted));
2149         }
2150         (void)putchar('\n');
2151         if (nreceived && timing) {
2152                 /* Only display average to microseconds */
2153                 double num = nreceived + nrepeats;
2154                 double avg = tsum / num;
2155 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__)
2156                 double dev = sqrt(tsumsq / num - avg * avg);
2157                 (void)printf(
2158                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2159                     tmin, avg, tmax, dev);
2160 #else
2161                 (void)printf(
2162                     "round-trip min/avg/max = %.3f/%.3f/%.3f ms\n",
2163                     tmin, avg, tmax);
2164 #endif
2165                 (void)fflush(stdout);
2166         }
2167         (void)fflush(stdout);
2168 }
2169
2170 /*subject type*/
2171 static char *niqcode[] = {
2172         "IPv6 address",
2173         "DNS label",    /*or empty*/
2174         "IPv4 address",
2175 };
2176
2177 /*result code*/
2178 static char *nircode[] = {
2179         "Success", "Refused", "Unknown",
2180 };
2181
2182
2183 /*
2184  * pr_icmph --
2185  *      Print a descriptive string about an ICMP header.
2186  */
2187 void
2188 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2189 {
2190         char ntop_buf[INET6_ADDRSTRLEN];
2191         struct nd_redirect *red;
2192         struct icmp6_nodeinfo *ni;
2193         char dnsname[MAXDNAME + 1];
2194         const u_char *cp;
2195         size_t l;
2196
2197         switch (icp->icmp6_type) {
2198         case ICMP6_DST_UNREACH:
2199                 switch (icp->icmp6_code) {
2200                 case ICMP6_DST_UNREACH_NOROUTE:
2201                         (void)printf("No Route to Destination\n");
2202                         break;
2203                 case ICMP6_DST_UNREACH_ADMIN:
2204                         (void)printf("Destination Administratively "
2205                             "Unreachable\n");
2206                         break;
2207                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2208                         (void)printf("Destination Unreachable Beyond Scope\n");
2209                         break;
2210                 case ICMP6_DST_UNREACH_ADDR:
2211                         (void)printf("Destination Host Unreachable\n");
2212                         break;
2213                 case ICMP6_DST_UNREACH_NOPORT:
2214                         (void)printf("Destination Port Unreachable\n");
2215                         break;
2216                 default:
2217                         (void)printf("Destination Unreachable, Bad Code: %d\n",
2218                             icp->icmp6_code);
2219                         break;
2220                 }
2221                 /* Print returned IP header information */
2222                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2223                 break;
2224         case ICMP6_PACKET_TOO_BIG:
2225                 (void)printf("Packet too big mtu = %d\n",
2226                     (int)ntohl(icp->icmp6_mtu));
2227                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2228                 break;
2229         case ICMP6_TIME_EXCEEDED:
2230                 switch (icp->icmp6_code) {
2231                 case ICMP6_TIME_EXCEED_TRANSIT:
2232                         (void)printf("Time to live exceeded\n");
2233                         break;
2234                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2235                         (void)printf("Frag reassembly time exceeded\n");
2236                         break;
2237                 default:
2238                         (void)printf("Time exceeded, Bad Code: %d\n",
2239                             icp->icmp6_code);
2240                         break;
2241                 }
2242                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2243                 break;
2244         case ICMP6_PARAM_PROB:
2245                 (void)printf("Parameter problem: ");
2246                 switch (icp->icmp6_code) {
2247                 case ICMP6_PARAMPROB_HEADER:
2248                         (void)printf("Erroneous Header ");
2249                         break;
2250                 case ICMP6_PARAMPROB_NEXTHEADER:
2251                         (void)printf("Unknown Nextheader ");
2252                         break;
2253                 case ICMP6_PARAMPROB_OPTION:
2254                         (void)printf("Unrecognized Option ");
2255                         break;
2256                 default:
2257                         (void)printf("Bad code(%d) ", icp->icmp6_code);
2258                         break;
2259                 }
2260                 (void)printf("pointer = 0x%02x\n",
2261                     (u_int32_t)ntohl(icp->icmp6_pptr));
2262                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2263                 break;
2264         case ICMP6_ECHO_REQUEST:
2265                 (void)printf("Echo Request");
2266                 /* XXX ID + Seq + Data */
2267                 break;
2268         case ICMP6_ECHO_REPLY:
2269                 (void)printf("Echo Reply");
2270                 /* XXX ID + Seq + Data */
2271                 break;
2272         case ICMP6_MEMBERSHIP_QUERY:
2273                 (void)printf("Listener Query");
2274                 break;
2275         case ICMP6_MEMBERSHIP_REPORT:
2276                 (void)printf("Listener Report");
2277                 break;
2278         case ICMP6_MEMBERSHIP_REDUCTION:
2279                 (void)printf("Listener Done");
2280                 break;
2281         case ND_ROUTER_SOLICIT:
2282                 (void)printf("Router Solicitation");
2283                 break;
2284         case ND_ROUTER_ADVERT:
2285                 (void)printf("Router Advertisement");
2286                 break;
2287         case ND_NEIGHBOR_SOLICIT:
2288                 (void)printf("Neighbor Solicitation");
2289                 break;
2290         case ND_NEIGHBOR_ADVERT:
2291                 (void)printf("Neighbor Advertisement");
2292                 break;
2293         case ND_REDIRECT:
2294                 red = (struct nd_redirect *)icp;
2295                 (void)printf("Redirect\n");
2296                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2297                     sizeof(ntop_buf)))
2298                         strncpy(ntop_buf, "?", sizeof(ntop_buf));
2299                 (void)printf("Destination: %s", ntop_buf);
2300                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2301                     sizeof(ntop_buf)))
2302                         strncpy(ntop_buf, "?", sizeof(ntop_buf));
2303                 (void)printf(" New Target: %s", ntop_buf);
2304                 break;
2305         case ICMP6_NI_QUERY:
2306                 (void)printf("Node Information Query");
2307                 /* XXX ID + Seq + Data */
2308                 ni = (struct icmp6_nodeinfo *)icp;
2309                 l = end - (u_char *)(ni + 1);
2310                 printf(", ");
2311                 switch (ntohs(ni->ni_qtype)) {
2312                 case NI_QTYPE_NOOP:
2313                         (void)printf("NOOP");
2314                         break;
2315                 case NI_QTYPE_SUPTYPES:
2316                         (void)printf("Supported qtypes");
2317                         break;
2318                 case NI_QTYPE_FQDN:
2319                         (void)printf("DNS name");
2320                         break;
2321                 case NI_QTYPE_NODEADDR:
2322                         (void)printf("nodeaddr");
2323                         break;
2324                 case NI_QTYPE_IPV4ADDR:
2325                         (void)printf("IPv4 nodeaddr");
2326                         break;
2327                 default:
2328                         (void)printf("unknown qtype");
2329                         break;
2330                 }
2331                 if (options & F_VERBOSE) {
2332                         switch (ni->ni_code) {
2333                         case ICMP6_NI_SUBJ_IPV6:
2334                                 if (l == sizeof(struct in6_addr) &&
2335                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2336                                     sizeof(ntop_buf)) != NULL) {
2337                                         (void)printf(", subject=%s(%s)",
2338                                             niqcode[ni->ni_code], ntop_buf);
2339                                 } else {
2340 #if 1
2341                                         /* backward compat to -W */
2342                                         (void)printf(", oldfqdn");
2343 #else
2344                                         (void)printf(", invalid");
2345 #endif
2346                                 }
2347                                 break;
2348                         case ICMP6_NI_SUBJ_FQDN:
2349                                 if (end == (u_char *)(ni + 1)) {
2350                                         (void)printf(", no subject");
2351                                         break;
2352                                 }
2353                                 printf(", subject=%s", niqcode[ni->ni_code]);
2354                                 cp = (const u_char *)(ni + 1);
2355                                 if (dnsdecode(&cp, end, NULL, dnsname,
2356                                     sizeof(dnsname)) != NULL)
2357                                         printf("(%s)", dnsname);
2358                                 else
2359                                         printf("(invalid)");
2360                                 break;
2361                         case ICMP6_NI_SUBJ_IPV4:
2362                                 if (l == sizeof(struct in_addr) &&
2363                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2364                                     sizeof(ntop_buf)) != NULL) {
2365                                         (void)printf(", subject=%s(%s)",
2366                                             niqcode[ni->ni_code], ntop_buf);
2367                                 } else
2368                                         (void)printf(", invalid");
2369                                 break;
2370                         default:
2371                                 (void)printf(", invalid");
2372                                 break;
2373                         }
2374                 }
2375                 break;
2376         case ICMP6_NI_REPLY:
2377                 (void)printf("Node Information Reply");
2378                 /* XXX ID + Seq + Data */
2379                 ni = (struct icmp6_nodeinfo *)icp;
2380                 printf(", ");
2381                 switch (ntohs(ni->ni_qtype)) {
2382                 case NI_QTYPE_NOOP:
2383                         (void)printf("NOOP");
2384                         break;
2385                 case NI_QTYPE_SUPTYPES:
2386                         (void)printf("Supported qtypes");
2387                         break;
2388                 case NI_QTYPE_FQDN:
2389                         (void)printf("DNS name");
2390                         break;
2391                 case NI_QTYPE_NODEADDR:
2392                         (void)printf("nodeaddr");
2393                         break;
2394                 case NI_QTYPE_IPV4ADDR:
2395                         (void)printf("IPv4 nodeaddr");
2396                         break;
2397                 default:
2398                         (void)printf("unknown qtype");
2399                         break;
2400                 }
2401                 if (options & F_VERBOSE) {
2402                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2403                                 printf(", invalid");
2404                         else
2405                                 printf(", %s", nircode[ni->ni_code]);
2406                 }
2407                 break;
2408         default:
2409                 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2410         }
2411 }
2412
2413 /*
2414  * pr_iph --
2415  *      Print an IP6 header.
2416  */
2417 void
2418 pr_iph(struct ip6_hdr *ip6)
2419 {
2420         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2421         u_int8_t tc;
2422         char ntop_buf[INET6_ADDRSTRLEN];
2423
2424         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2425         tc = (tc >> 4) & 0x0f;
2426         tc |= (ip6->ip6_vfc << 4);
2427
2428         printf("Vr TC  Flow Plen Nxt Hlim\n");
2429         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2430             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2431             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2432         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2433                 strncpy(ntop_buf, "?", sizeof(ntop_buf));
2434         printf("%s->", ntop_buf);
2435         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2436                 strncpy(ntop_buf, "?", sizeof(ntop_buf));
2437         printf("%s\n", ntop_buf);
2438 }
2439
2440 /*
2441  * pr_addr --
2442  *      Return an ascii host address as a dotted quad and optionally with
2443  * a hostname.
2444  */
2445 const char *
2446 pr_addr(struct sockaddr *addr, int addrlen)
2447 {
2448         static char buf[NI_MAXHOST];
2449         int flag;
2450
2451 #ifdef NI_WITHSCOPEID
2452         flag = NI_WITHSCOPEID;
2453 #else
2454         flag = 0;
2455 #endif
2456         if ((options & F_HOSTNAME) == 0)
2457                 flag |= NI_NUMERICHOST;
2458
2459         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2460                 return (buf);
2461         else
2462                 return "?";
2463 }
2464
2465 /*
2466  * pr_retip --
2467  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2468  */
2469 void
2470 pr_retip(struct ip6_hdr *ip6, u_char *end)
2471 {
2472         u_char *cp = (u_char *)ip6, nh;
2473         int hlen;
2474
2475         if (end - (u_char *)ip6 < sizeof(*ip6)) {
2476                 printf("IP6");
2477                 goto trunc;
2478         }
2479         pr_iph(ip6);
2480         hlen = sizeof(*ip6);
2481
2482         nh = ip6->ip6_nxt;
2483         cp += hlen;
2484         while (end - cp >= 8) {
2485                 switch (nh) {
2486                 case IPPROTO_HOPOPTS:
2487                         printf("HBH ");
2488                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2489                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2490                         break;
2491                 case IPPROTO_DSTOPTS:
2492                         printf("DSTOPT ");
2493                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2494                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2495                         break;
2496                 case IPPROTO_FRAGMENT:
2497                         printf("FRAG ");
2498                         hlen = sizeof(struct ip6_frag);
2499                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2500                         break;
2501                 case IPPROTO_ROUTING:
2502                         printf("RTHDR ");
2503                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2504                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2505                         break;
2506 #ifdef IPSEC
2507                 case IPPROTO_AH:
2508                         printf("AH ");
2509                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2510                         nh = ((struct ah *)cp)->ah_nxt;
2511                         break;
2512 #endif
2513                 case IPPROTO_ICMPV6:
2514                         printf("ICMP6: type = %d, code = %d\n",
2515                             *cp, *(cp + 1));
2516                         return;
2517                 case IPPROTO_ESP:
2518                         printf("ESP\n");
2519                         return;
2520                 case IPPROTO_TCP:
2521                         printf("TCP: from port %u, to port %u (decimal)\n",
2522                             (*cp * 256 + *(cp + 1)),
2523                             (*(cp + 2) * 256 + *(cp + 3)));
2524                         return;
2525                 case IPPROTO_UDP:
2526                         printf("UDP: from port %u, to port %u (decimal)\n",
2527                             (*cp * 256 + *(cp + 1)),
2528                             (*(cp + 2) * 256 + *(cp + 3)));
2529                         return;
2530                 default:
2531                         printf("Unknown Header(%d)\n", nh);
2532                         return;
2533                 }
2534
2535                 if ((cp += hlen) >= end)
2536                         goto trunc;
2537         }
2538         if (end - cp < 8)
2539                 goto trunc;
2540
2541         putchar('\n');
2542         return;
2543
2544   trunc:
2545         printf("...\n");
2546         return;
2547 }
2548
2549 void
2550 fill(char *bp, char *patp)
2551 {
2552         register int ii, jj, kk;
2553         int pat[16];
2554         char *cp;
2555
2556         for (cp = patp; *cp; cp++)
2557                 if (!isxdigit(*cp))
2558                         errx(1, "patterns must be specified as hex digits");
2559         ii = sscanf(patp,
2560             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2561             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2562             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2563             &pat[13], &pat[14], &pat[15]);
2564
2565 /* xxx */
2566         if (ii > 0)
2567                 for (kk = 0;
2568                     kk <= MAXDATALEN - (8 + sizeof(struct timeval) + ii);
2569                     kk += ii)
2570                         for (jj = 0; jj < ii; ++jj)
2571                                 bp[jj + kk] = pat[jj];
2572         if (!(options & F_QUIET)) {
2573                 (void)printf("PATTERN: 0x");
2574                 for (jj = 0; jj < ii; ++jj)
2575                         (void)printf("%02x", bp[jj] & 0xFF);
2576                 (void)printf("\n");
2577         }
2578 }
2579
2580 #ifdef IPSEC
2581 #ifdef IPSEC_POLICY_IPSEC
2582 int
2583 setpolicy(int so, char *policy)
2584 {
2585         char *buf;
2586
2587         if (policy == NULL)
2588                 return 0;       /* ignore */
2589
2590         buf = ipsec_set_policy(policy, strlen(policy));
2591         if (buf == NULL)
2592                 errx(1, "%s", ipsec_strerror());
2593         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2594             ipsec_get_policylen(buf)) < 0)
2595                 warnx("Unable to set IPSec policy");
2596         free(buf);
2597
2598         return 0;
2599 }
2600 #endif
2601 #endif
2602
2603 char *
2604 nigroup(char *name)
2605 {
2606         char *p;
2607         unsigned char *q;
2608         MD5_CTX ctxt;
2609         u_int8_t digest[16];
2610         u_int8_t c;
2611         size_t l;
2612         char hbuf[NI_MAXHOST];
2613         struct in6_addr in6;
2614
2615         p = strchr(name, '.');
2616         if (!p)
2617                 p = name + strlen(name);
2618         l = p - name;
2619         if (l > 63 || l > sizeof(hbuf) - 1)
2620                 return NULL;    /*label too long*/
2621         strncpy(hbuf, name, l);
2622         hbuf[(int)l] = '\0';
2623
2624         for (q = name; *q; q++) {
2625                 if (isupper(*q))
2626                         *q = tolower(*q);
2627         }
2628
2629         /* generate 8 bytes of pseudo-random value. */
2630         bzero(&ctxt, sizeof(ctxt));
2631         MD5Init(&ctxt);
2632         c = l & 0xff;
2633         MD5Update(&ctxt, &c, sizeof(c));
2634         MD5Update(&ctxt, name, l);
2635         MD5Final(digest, &ctxt);
2636
2637         if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1)
2638                 return NULL;    /*XXX*/
2639         bcopy(digest, &in6.s6_addr[12], 4);
2640
2641         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2642                 return NULL;
2643
2644         return strdup(hbuf);
2645 }
2646
2647 void
2648 usage(void)
2649 {
2650         (void)fprintf(stderr,
2651             "usage: ping6 [-dfH"
2652 #ifdef IPV6_USE_MIN_MTU
2653             "m"
2654 #endif
2655             "nNqtvwW"
2656 #ifdef IPV6_REACHCONF
2657             "R"
2658 #endif
2659 #ifdef IPSEC
2660 #ifdef IPSEC_POLICY_IPSEC
2661             "] [-P policy"
2662 #else
2663             "AE"
2664 #endif
2665 #endif
2666             "] [-a [aAclsg]] [-b sockbufsiz] [-c count] \n"
2667             "\t[-I interface] [-i wait] [-l preload] [-p pattern] "
2668             "[-S sourceaddr]\n"
2669             "\t[-s packetsize] [-h hoplimit] [hops...] host\n");
2670         exit(1);
2671 }