sbin/ping6/ping6.c

   1 /*      $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * @(#) 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 1.30 2007/04/19 15:41:00 mtm Exp $
  34  * $DragonFly: src/sbin/ping6/ping6.c,v 1.10 2008/09/04 10:13:10 hasso 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 #include <math.h>
 118 #include <signal.h>
 119 #include <stdio.h>
 120 #include <stdlib.h>
 121 #include <string.h>
 122 #include <unistd.h>
 123 #ifdef HAVE_POLL_H
 124 #include <poll.h>
 125 #endif
 126
 127 #ifdef IPSEC
 128 #include <netinet6/ah.h>
 129 #include <netinet6/ipsec.h>
 130 #endif
 131
 132 #include <md5.h>
 133
 134 struct tv32 {
 135         u_int32_t tv32_sec;
 136         u_int32_t tv32_usec;
 137 };
 138
 139 #define MAXPACKETLEN    131072
 140 #define IP6LEN          40
 141 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 142 #define ICMP6ECHOTMLEN sizeof(struct tv32)
 143 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 144 #define CONTROLLEN      10240   /* ancillary data buffer size RFC3542 20.1 */
 145 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 146 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 147 #define EXTRA           256     /* for AH and various other headers. weird. */
 148 #define DEFDATALEN      ICMP6ECHOTMLEN
 149 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 150 #define NROUTES         9               /* number of record route slots */
 151
 152 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 153 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 154 #define SET(bit)        (A(bit) |= B(bit))
 155 #define CLR(bit)        (A(bit) &= (~B(bit)))
 156 #define TST(bit)        (A(bit) & B(bit))
 157
 158 #define F_FLOOD         0x0001
 159 #define F_INTERVAL      0x0002
 160 #define F_PINGFILLED    0x0008
 161 #define F_QUIET         0x0010
 162 #define F_RROUTE        0x0020
 163 #define F_SO_DEBUG      0x0040
 164 #define F_VERBOSE       0x0100
 165 #ifdef IPSEC
 166 #ifdef IPSEC_POLICY_IPSEC
 167 #define F_POLICY        0x0400
 168 #else
 169 #define F_AUTHHDR       0x0200
 170 #define F_ENCRYPT       0x0400
 171 #endif /*IPSEC_POLICY_IPSEC*/
 172 #endif /*IPSEC*/
 173 #define F_NODEADDR      0x0800
 174 #define F_FQDN          0x1000
 175 #define F_INTERFACE     0x2000
 176 #define F_SRCADDR       0x4000
 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 socklen_t srclen;
 204 int datalen = DEFDATALEN;
 205 int s;                          /* socket file descriptor */
 206 u_char outpack[MAXPACKETLEN];
 207 char BSPACE = '\b';             /* characters written for flood */
 208 char DOT = '.';
 209 char *hostname;
 210 int ident;                      /* process id to identify our packets */
 211 u_int8_t nonce[8];              /* nonce field for node information */
 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 double tsumsq = 0.0;            /* sum of all times squared, for std. dev. */
 228
 229 /* for node addresses */
 230 u_short naflags;
 231
 232 /* for ancillary data(advanced API) */
 233 struct msghdr smsghdr;
 234 struct iovec smsgiov;
 235 char *scmsg = 0;
 236
 237 volatile sig_atomic_t seenalrm;
 238 volatile sig_atomic_t seenint;
 239 #ifdef SIGINFO
 240 volatile sig_atomic_t seeninfo;
 241 #endif
 242
 243 int      main(int, char *[]);
 244 void     fill(char *, char *);
 245 int      get_hoplim(struct msghdr *);
 246 #ifdef IPV6_RECVPATHMTU
 247 int      get_pathmtu(struct msghdr *);
 248 #else
 249 #define get_pathmtu(mhdr) (0)
 250 #endif
 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         char *, size_t);
 266 void     pr_pack(u_char *, int, struct msghdr *);
 267 void     pr_exthdrs(struct msghdr *);
 268 void     pr_ip6opt(void *, size_t);
 269 void     pr_rthdr(void *, size_t);
 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 #ifndef HAVE_ARC4RANDOM
 284         struct timeval seed;
 285 #endif
 286 #ifdef HAVE_POLL_H
 287         int timeout;
 288 #else
 289         struct timeval timeout, *tv;
 290 #endif
 291         struct addrinfo hints;
 292 #ifdef HAVE_POLL_H
 293         struct pollfd fdmaskp[1];
 294 #else
 295         fd_set *fdmaskp;
 296         int fdmasks;
 297 #endif
 298         int cc, i;
 299         int ch, hold, packlen, preload, optval, ret_ga;
 300         u_char *datap, *packet;
 301         char *e, *target, *ifname = NULL, *gateway = NULL;
 302         int ip6optlen = 0;
 303         struct cmsghdr *scmsgp = NULL;
 304         struct cmsghdr *cm;
 305 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 306         u_long lsockbufsize;
 307         int sockbufsize = 0;
 308 #endif
 309         int usepktinfo = 0;
 310         struct in6_pktinfo *pktinfo = NULL;
 311 #ifdef USE_RFC3542
 312         struct ip6_rthdr *rthdr = NULL;
 313 #endif
 314 #ifdef IPSEC_POLICY_IPSEC
 315         char *policy_in = NULL;
 316         char *policy_out = NULL;
 317 #endif
 318 #ifdef IPV6_USE_MIN_MTU
 319         int mflag = 0;
 320 #endif
 321         double intval;
 322
 323         /* just to be sure */
 324         memset(&smsghdr, 0, sizeof(smsghdr));
 325         memset(&smsgiov, 0, sizeof(smsgiov));
 326
 327         preload = 0;
 328         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 329 #ifndef IPSEC
 330 #define ADDOPTS
 331 #else
 332 #ifdef IPSEC_POLICY_IPSEC
 333 #define ADDOPTS "P:"
 334 #else
 335 #define ADDOPTS "AE"
 336 #endif /*IPSEC_POLICY_IPSEC*/
 337 #endif
 338         while ((ch = getopt(argc, argv,
 339             "a:b:c:dfHg:h:I:i:l:mnNp:qS:s:tvwW" ADDOPTS)) != -1) {
 340 #undef ADDOPTS
 341                 switch (ch) {
 342                 case 'a':
 343                 {
 344                         char *cp;
 345
 346                         options &= ~F_NOUSERDATA;
 347                         options |= F_NODEADDR;
 348                         for (cp = optarg; *cp != '\0'; cp++) {
 349                                 switch (*cp) {
 350                                 case 'a':
 351                                         naflags |= NI_NODEADDR_FLAG_ALL;
 352                                         break;
 353                                 case 'c':
 354                                 case 'C':
 355                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 356                                         break;
 357                                 case 'l':
 358                                 case 'L':
 359                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 360                                         break;
 361                                 case 's':
 362                                 case 'S':
 363                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 364                                         break;
 365                                 case 'g':
 366                                 case 'G':
 367                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 368                                         break;
 369                                 case 'A': /* experimental. not in the spec */
 370 #ifdef NI_NODEADDR_FLAG_ANYCAST
 371                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 372                                         break;
 373 #else
 374                                         errx(1,
 375 "-a A is not supported on the platform");
 376                                         /*NOTREACHED*/
 377 #endif
 378                                 default:
 379                                         usage();
 380                                         /*NOTREACHED*/
 381                                 }
 382                         }
 383                         break;
 384                 }
 385                 case 'b':
 386 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 387                         errno = 0;
 388                         e = NULL;
 389                         lsockbufsize = strtoul(optarg, &e, 10);
 390                         sockbufsize = lsockbufsize;
 391                         if (errno || !*optarg || *e ||
 392                             sockbufsize != (long)lsockbufsize)
 393                                 errx(1, "invalid socket buffer size");
 394 #else
 395                         errx(1,
 396 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 397 #endif
 398                         break;
 399                 case 'c':
 400                         npackets = strtol(optarg, &e, 10);
 401                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 402                                 errx(1,
 403                                     "illegal number of packets -- %s", optarg);
 404                         break;
 405                 case 'd':
 406                         options |= F_SO_DEBUG;
 407                         break;
 408                 case 'f':
 409                         if (getuid()) {
 410                                 errno = EPERM;
 411                                 errx(1, "Must be superuser to flood ping");
 412                         }
 413                         options |= F_FLOOD;
 414                         setbuf(stdout, NULL);
 415                         break;
 416                 case 'g':
 417                         gateway = optarg;
 418                         break;
 419                 case 'H':
 420                         options |= F_HOSTNAME;
 421                         break;
 422                 case 'h':               /* hoplimit */
 423                         hoplimit = strtol(optarg, &e, 10);
 424                         if (*optarg == '\0' || *e != '\0')
 425                                 errx(1, "illegal hoplimit %s", optarg);
 426                         if (255 < hoplimit || hoplimit < -1)
 427                                 errx(1,
 428                                     "illegal hoplimit -- %s", optarg);
 429                         break;
 430                 case 'I':
 431                         ifname = optarg;
 432                         options |= F_INTERFACE;
 433 #ifndef USE_SIN6_SCOPE_ID
 434                         usepktinfo++;
 435 #endif
 436                         break;
 437                 case 'i':               /* wait between sending packets */
 438                         intval = strtod(optarg, &e);
 439                         if (*optarg == '\0' || *e != '\0')
 440                                 errx(1, "illegal timing interval %s", optarg);
 441                         if (intval < 1 && getuid()) {
 442                                 errx(1, "%s: only root may use interval < 1s",
 443                                     strerror(EPERM));
 444                         }
 445                         interval.tv_sec = (long)intval;
 446                         interval.tv_usec =
 447                             (long)((intval - interval.tv_sec) * 1000000);
 448                         if (interval.tv_sec < 0)
 449                                 errx(1, "illegal timing interval %s", optarg);
 450                         /* less than 1/hz does not make sense */
 451                         if (interval.tv_sec == 0 && interval.tv_usec < 10000) {
 452                                 warnx("too small interval, raised to 0.01");
 453                                 interval.tv_usec = 10000;
 454                         }
 455                         options |= F_INTERVAL;
 456                         break;
 457                 case 'l':
 458                         if (getuid()) {
 459                                 errno = EPERM;
 460                                 errx(1, "Must be superuser to preload");
 461                         }
 462                         preload = strtol(optarg, &e, 10);
 463                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 464                                 errx(1, "illegal preload value -- %s", optarg);
 465                         break;
 466                 case 'm':
 467 #ifdef IPV6_USE_MIN_MTU
 468                         mflag++;
 469                         break;
 470 #else
 471                         errx(1, "-%c is not supported on this platform", ch);
 472                         /*NOTREACHED*/
 473 #endif
 474                 case 'n':
 475                         options &= ~F_HOSTNAME;
 476                         break;
 477                 case 'N':
 478                         options |= F_NIGROUP;
 479                         break;
 480                 case 'p':               /* fill buffer with user pattern */
 481                         options |= F_PINGFILLED;
 482                         fill((char *)datap, optarg);
 483                                 break;
 484                 case 'q':
 485                         options |= F_QUIET;
 486                         break;
 487                 case 'S':
 488                         memset(&hints, 0, sizeof(struct addrinfo));
 489                         hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
 490                         hints.ai_family = AF_INET6;
 491                         hints.ai_socktype = SOCK_RAW;
 492                         hints.ai_protocol = IPPROTO_ICMPV6;
 493
 494                         ret_ga = getaddrinfo(optarg, NULL, &hints, &res);
 495                         if (ret_ga) {
 496                                 errx(1, "invalid source address: %s",
 497                                      gai_strerror(ret_ga));
 498                         }
 499                         /*
 500                          * res->ai_family must be AF_INET6 and res->ai_addrlen
 501                          * must be sizeof(src).
 502                          */
 503                         memcpy(&src, res->ai_addr, res->ai_addrlen);
 504                         srclen = res->ai_addrlen;
 505                         freeaddrinfo(res);
 506                         options |= F_SRCADDR;
 507                         break;
 508                 case 's':               /* size of packet to send */
 509                         datalen = strtol(optarg, &e, 10);
 510                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 511                                 errx(1, "illegal datalen value -- %s", optarg);
 512                         if (datalen > MAXDATALEN) {
 513                                 errx(1,
 514                                     "datalen value too large, maximum is %d",
 515                                     MAXDATALEN);
 516                         }
 517                         break;
 518                 case 't':
 519                         options &= ~F_NOUSERDATA;
 520                         options |= F_SUPTYPES;
 521                         break;
 522                 case 'v':
 523                         options |= F_VERBOSE;
 524                         break;
 525                 case 'w':
 526                         options &= ~F_NOUSERDATA;
 527                         options |= F_FQDN;
 528                         break;
 529                 case 'W':
 530                         options &= ~F_NOUSERDATA;
 531                         options |= F_FQDNOLD;
 532                         break;
 533 #ifdef IPSEC
 534 #ifdef IPSEC_POLICY_IPSEC
 535                 case 'P':
 536                         options |= F_POLICY;
 537                         if (!strncmp("in", optarg, 2)) {
 538                                 if ((policy_in = strdup(optarg)) == NULL)
 539                                         errx(1, "strdup");
 540                         } else if (!strncmp("out", optarg, 3)) {
 541                                 if ((policy_out = strdup(optarg)) == NULL)
 542                                         errx(1, "strdup");
 543                         } else
 544                                 errx(1, "invalid security policy");
 545                         break;
 546 #else
 547                 case 'A':
 548                         options |= F_AUTHHDR;
 549                         break;
 550                 case 'E':
 551                         options |= F_ENCRYPT;
 552                         break;
 553 #endif /*IPSEC_POLICY_IPSEC*/
 554 #endif /*IPSEC*/
 555                 default:
 556                         usage();
 557                         /*NOTREACHED*/
 558                 }
 559         }
 560
 561         argc -= optind;
 562         argv += optind;
 563
 564         if (argc < 1) {
 565                 usage();
 566                 /*NOTREACHED*/
 567         }
 568         if (argc > 1) {
 569                 errx(1, "too many arguments");
 570                 /*NOTREACHED*/
 571         }
 572
 573         if (options & F_NIGROUP) {
 574                 target = nigroup(argv[argc - 1]);
 575                 if (target == NULL) {
 576                         usage();
 577                         /*NOTREACHED*/
 578                 }
 579         } else
 580                 target = argv[argc - 1];
 581
 582         /* getaddrinfo */
 583         memset(&hints, 0, sizeof(struct addrinfo));
 584         hints.ai_flags = AI_CANONNAME;
 585         hints.ai_family = AF_INET6;
 586         hints.ai_socktype = SOCK_RAW;
 587         hints.ai_protocol = IPPROTO_ICMPV6;
 588
 589         ret_ga = getaddrinfo(target, NULL, &hints, &res);
 590         if (ret_ga)
 591                 errx(1, "%s", gai_strerror(ret_ga));
 592         if (res->ai_canonname)
 593                 hostname = res->ai_canonname;
 594         else
 595                 hostname = target;
 596
 597         if (!res->ai_addr)
 598                 errx(1, "getaddrinfo failed");
 599
 600         memcpy(&dst, res->ai_addr, res->ai_addrlen);
 601
 602         if ((s = socket(res->ai_family, res->ai_socktype,
 603             res->ai_protocol)) < 0)
 604                 err(1, "socket");
 605
 606         /* set the source address if specified. */
 607         if ((options & F_SRCADDR) &&
 608             bind(s, (struct sockaddr *)&src, srclen) != 0) {
 609                 err(1, "bind");
 610         }
 611
 612         /* set the gateway (next hop) if specified */
 613         if (gateway) {
 614                 struct addrinfo ghints, *gres;
 615                 int error;
 616
 617                 memset(&ghints, 0, sizeof(ghints));
 618                 ghints.ai_family = AF_INET6;
 619                 ghints.ai_socktype = SOCK_RAW;
 620                 ghints.ai_protocol = IPPROTO_ICMPV6;
 621
 622                 error = getaddrinfo(gateway, NULL, &hints, &gres);
 623                 if (error) {
 624                         errx(1, "getaddrinfo for the gateway %s: %s",
 625                              gateway, gai_strerror(error));
 626                 }
 627                 if (gres->ai_next && (options & F_VERBOSE))
 628                         warnx("gateway resolves to multiple addresses");
 629
 630                 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
 631                                gres->ai_addr, gres->ai_addrlen)) {
 632                         err(1, "setsockopt(IPV6_NEXTHOP)");
 633                 }
 634
 635                 freeaddrinfo(gres);
 636         }
 637
 638         /*
 639          * let the kerel pass extension headers of incoming packets,
 640          * for privileged socket options
 641          */
 642         if ((options & F_VERBOSE) != 0) {
 643                 int opton = 1;
 644
 645 #ifdef IPV6_RECVHOPOPTS
 646                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 647                     sizeof(opton)))
 648                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 649 #else  /* old adv. API */
 650                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 651                     sizeof(opton)))
 652                         err(1, "setsockopt(IPV6_HOPOPTS)");
 653 #endif
 654 #ifdef IPV6_RECVDSTOPTS
 655                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 656                     sizeof(opton)))
 657                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 658 #else  /* old adv. API */
 659                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 660                     sizeof(opton)))
 661                         err(1, "setsockopt(IPV6_DSTOPTS)");
 662 #endif
 663 #ifdef IPV6_RECVRTHDRDSTOPTS
 664                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 665                     sizeof(opton)))
 666                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 667 #endif
 668         }
 669
 670         /* revoke root privilege */
 671         seteuid(getuid());
 672         setuid(getuid());
 673
 674         if ((options & F_FLOOD) && (options & F_INTERVAL))
 675                 errx(1, "-f and -i incompatible options");
 676
 677         if ((options & F_NOUSERDATA) == 0) {
 678                 if (datalen >= (int)sizeof(struct tv32)) {
 679                         /* we can time transfer */
 680                         timing = 1;
 681                 } else
 682                         timing = 0;
 683                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 684                 if (options & F_VERBOSE)
 685                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 686                 else
 687                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 688         } else {
 689                 /* suppress timing for node information query */
 690                 timing = 0;
 691                 datalen = 2048;
 692                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 693         }
 694
 695         if (!(packet = (u_char *)malloc((u_int)packlen)))
 696                 err(1, "Unable to allocate packet");
 697         if (!(options & F_PINGFILLED))
 698                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 699                         *datap++ = i;
 700
 701         ident = getpid() & 0xFFFF;
 702 #ifndef HAVE_ARC4RANDOM
 703         gettimeofday(&seed, NULL);
 704         srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident));
 705         memset(nonce, 0, sizeof(nonce));
 706         for (i = 0; i < (int)sizeof(nonce); i += sizeof(int))
 707                 *((int *)&nonce[i]) = rand();
 708 #else
 709         memset(nonce, 0, sizeof(nonce));
 710         for (i = 0; i < (int)sizeof(nonce); i += sizeof(u_int32_t))
 711                 *((u_int32_t *)&nonce[i]) = arc4random();
 712 #endif
 713
 714         hold = 1;
 715
 716         if (options & F_SO_DEBUG)
 717                 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 718                     sizeof(hold));
 719         optval = IPV6_DEFHLIM;
 720         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 721                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 722                     &optval, sizeof(optval)) == -1)
 723                         err(1, "IPV6_MULTICAST_HOPS");
 724 #ifdef IPV6_USE_MIN_MTU
 725         if (mflag != 1) {
 726                 optval = mflag > 1 ? 0 : 1;
 727                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 728                     &optval, sizeof(optval)) == -1)
 729                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 730         }
 731 #ifdef IPV6_RECVPATHMTU
 732         else {
 733                 optval = 1;
 734                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 735                     &optval, sizeof(optval)) == -1)
 736                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 737         }
 738 #endif /* IPV6_RECVPATHMTU */
 739 #endif /* IPV6_USE_MIN_MTU */
 740
 741 #ifdef IPSEC
 742 #ifdef IPSEC_POLICY_IPSEC
 743         if (options & F_POLICY) {
 744                 if (setpolicy(s, policy_in) < 0)
 745                         errx(1, "%s", ipsec_strerror());
 746                 if (setpolicy(s, policy_out) < 0)
 747                         errx(1, "%s", ipsec_strerror());
 748         }
 749 #else
 750         if (options & F_AUTHHDR) {
 751                 optval = IPSEC_LEVEL_REQUIRE;
 752 #ifdef IPV6_AUTH_TRANS_LEVEL
 753                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 754                     &optval, sizeof(optval)) == -1)
 755                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 756 #else /* old def */
 757                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 758                     &optval, sizeof(optval)) == -1)
 759                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 760 #endif
 761         }
 762         if (options & F_ENCRYPT) {
 763                 optval = IPSEC_LEVEL_REQUIRE;
 764                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 765                     &optval, sizeof(optval)) == -1)
 766                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 767         }
 768 #endif /*IPSEC_POLICY_IPSEC*/
 769 #endif
 770
 771 #ifdef ICMP6_FILTER
 772     {
 773         struct icmp6_filter filt;
 774         if (!(options & F_VERBOSE)) {
 775                 ICMP6_FILTER_SETBLOCKALL(&filt);
 776                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 777                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 778                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 779                 else
 780                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 781         } else {
 782                 ICMP6_FILTER_SETPASSALL(&filt);
 783         }
 784         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 785             sizeof(filt)) < 0)
 786                 err(1, "setsockopt(ICMP6_FILTER)");
 787     }
 788 #endif /*ICMP6_FILTER*/
 789
 790         /* let the kerel pass extension headers of incoming packets */
 791         if ((options & F_VERBOSE) != 0) {
 792                 int opton = 1;
 793
 794 #ifdef IPV6_RECVRTHDR
 795                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 796                     sizeof(opton)))
 797                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 798 #else  /* old adv. API */
 799                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 800                     sizeof(opton)))
 801                         err(1, "setsockopt(IPV6_RTHDR)");
 802 #endif
 803         }
 804
 805 /*
 806         optval = 1;
 807         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 808                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 809                     &optval, sizeof(optval)) == -1)
 810                         err(1, "IPV6_MULTICAST_LOOP");
 811 */
 812
 813         /* Specify the outgoing interface and/or the source address */
 814         if (usepktinfo)
 815                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 816
 817         if (hoplimit != -1)
 818                 ip6optlen += CMSG_SPACE(sizeof(int));
 819
 820         /* set IP6 packet options */
 821         if (ip6optlen) {
 822                 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
 823                         errx(1, "can't allocate enough memory");
 824                 smsghdr.msg_control = (caddr_t)scmsg;
 825                 smsghdr.msg_controllen = ip6optlen;
 826                 scmsgp = (struct cmsghdr *)scmsg;
 827         }
 828         if (usepktinfo) {
 829                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 830                 memset(pktinfo, 0, sizeof(*pktinfo));
 831                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 832                 scmsgp->cmsg_level = IPPROTO_IPV6;
 833                 scmsgp->cmsg_type = IPV6_PKTINFO;
 834                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 835         }
 836
 837         /* set the outgoing interface */
 838         if (ifname) {
 839 #ifndef USE_SIN6_SCOPE_ID
 840                 /* pktinfo must have already been allocated */
 841                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 842                         errx(1, "%s: invalid interface name", ifname);
 843 #else
 844                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 845                         errx(1, "%s: invalid interface name", ifname);
 846 #endif
 847         }
 848         if (hoplimit != -1) {
 849                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 850                 scmsgp->cmsg_level = IPPROTO_IPV6;
 851                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 852                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 853
 854                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 855         }
 856
 857         if (!(options & F_SRCADDR)) {
 858                 /*
 859                  * get the source address. XXX since we revoked the root
 860                  * privilege, we cannot use a raw socket for this.
 861                  */
 862                 int dummy;
 863                 socklen_t len = sizeof(src);
 864
 865                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 866                         err(1, "UDP socket");
 867
 868                 src.sin6_family = AF_INET6;
 869                 src.sin6_addr = dst.sin6_addr;
 870                 src.sin6_port = ntohs(DUMMY_PORT);
 871                 src.sin6_scope_id = dst.sin6_scope_id;
 872
 873 #ifdef USE_RFC3542
 874                 if (pktinfo &&
 875                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 876                     (void *)pktinfo, sizeof(*pktinfo)))
 877                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 878                 if (hoplimit != -1 &&
 879                     setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 880                     (void *)&hoplimit, sizeof(hoplimit)))
 881                         err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
 882                 if (hoplimit != -1 &&
 883                     setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 884                     (void *)&hoplimit, sizeof(hoplimit)))
 885                         err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
 886                 if (rthdr &&
 887                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
 888                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
 889                         err(1, "UDP setsockopt(IPV6_RTHDR)");
 890 #else  /* old advanced API */
 891                 if (smsghdr.msg_control &&
 892                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
 893                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
 894                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
 895 #endif
 896
 897                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
 898                         err(1, "UDP connect");
 899
 900                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
 901                         err(1, "getsockname");
 902
 903                 close(dummy);
 904         }
 905
 906 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 907         if (sockbufsize) {
 908                 if (datalen > sockbufsize)
 909                         warnx("you need -b to increase socket buffer size");
 910                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
 911                     sizeof(sockbufsize)) < 0)
 912                         err(1, "setsockopt(SO_SNDBUF)");
 913                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
 914                     sizeof(sockbufsize)) < 0)
 915                         err(1, "setsockopt(SO_RCVBUF)");
 916         }
 917         else {
 918                 if (datalen > 8 * 1024) /*XXX*/
 919                         warnx("you need -b to increase socket buffer size");
 920                 /*
 921                  * When pinging the broadcast address, you can get a lot of
 922                  * answers. Doing something so evil is useful if you are trying
 923                  * to stress the ethernet, or just want to fill the arp cache
 924                  * to get some stuff for /etc/ethers.
 925                  */
 926                 hold = 48 * 1024;
 927                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
 928                     sizeof(hold));
 929         }
 930 #endif
 931
 932         optval = 1;
 933 #ifndef USE_SIN6_SCOPE_ID
 934 #ifdef IPV6_RECVPKTINFO
 935         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
 936             sizeof(optval)) < 0)
 937                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
 938 #else  /* old adv. API */
 939         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
 940             sizeof(optval)) < 0)
 941                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
 942 #endif
 943 #endif /* USE_SIN6_SCOPE_ID */
 944 #ifdef IPV6_RECVHOPLIMIT
 945         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
 946             sizeof(optval)) < 0)
 947                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
 948 #else  /* old adv. API */
 949         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
 950             sizeof(optval)) < 0)
 951                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
 952 #endif
 953
 954         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
 955             (unsigned long)(pingerlen() - 8));
 956         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
 957         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
 958
 959         while (preload--)               /* Fire off them quickies. */
 960                 pinger();
 961
 962         signal(SIGINT, onsignal);
 963 #ifdef SIGINFO
 964         signal(SIGINFO, onsignal);
 965 #endif
 966
 967         if ((options & F_FLOOD) == 0) {
 968                 signal(SIGALRM, onsignal);
 969                 itimer.it_interval = interval;
 970                 itimer.it_value = interval;
 971                 setitimer(ITIMER_REAL, &itimer, NULL);
 972                 if (ntransmitted == 0)
 973                         retransmit();
 974         }
 975
 976 #ifndef HAVE_POLL_H
 977         fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
 978         if ((fdmaskp = malloc(fdmasks)) == NULL)
 979                 err(1, "malloc");
 980 #endif
 981
 982         seenalrm = seenint = 0;
 983 #ifdef SIGINFO
 984         seeninfo = 0;
 985 #endif
 986
 987         /* For control (ancillary) data received from recvmsg() */
 988         cm = (struct cmsghdr *)malloc(CONTROLLEN);
 989         if (cm == NULL)
 990                 err(1, "malloc");
 991
 992         for (;;) {
 993                 struct msghdr m;
 994                 struct iovec iov[2];
 995
 996                 /* signal handling */
 997                 if (seenalrm) {
 998                         retransmit();
 999                         seenalrm = 0;
1000                         continue;
1001                 }
1002                 if (seenint) {
1003                         onint(SIGINT);
1004                         seenint = 0;
1005                         continue;
1006                 }
1007 #ifdef SIGINFO
1008                 if (seeninfo) {
1009                         summary();
1010                         seeninfo = 0;
1011                         continue;
1012                 }
1013 #endif
1014
1015                 if (options & F_FLOOD) {
1016                         pinger();
1017 #ifdef HAVE_POLL_H
1018                         timeout = 10;
1019 #else
1020                         timeout.tv_sec = 0;
1021                         timeout.tv_usec = 10000;
1022                         tv = &timeout;
1023 #endif
1024                 } else {
1025 #ifdef HAVE_POLL_H
1026                         timeout = INFTIM;
1027 #else
1028                         tv = NULL;
1029 #endif
1030                 }
1031 #ifdef HAVE_POLL_H
1032                 fdmaskp[0].fd = s;
1033                 fdmaskp[0].events = POLLIN;
1034                 cc = poll(fdmaskp, 1, timeout);
1035 #else
1036                 memset(fdmaskp, 0, fdmasks);
1037                 FD_SET(s, fdmaskp);
1038                 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1039 #endif
1040                 if (cc < 0) {
1041                         if (errno != EINTR) {
1042 #ifdef HAVE_POLL_H
1043                                 warn("poll");
1044 #else
1045                                 warn("select");
1046 #endif
1047                                 sleep(1);
1048                         }
1049                         continue;
1050                 } else if (cc == 0)
1051                         continue;
1052
1053                 m.msg_name = (caddr_t)&from;
1054                 m.msg_namelen = sizeof(from);
1055                 memset(&iov, 0, sizeof(iov));
1056                 iov[0].iov_base = (caddr_t)packet;
1057                 iov[0].iov_len = packlen;
1058                 m.msg_iov = iov;
1059                 m.msg_iovlen = 1;
1060                 memset(cm, 0, CONTROLLEN);
1061                 m.msg_control = (void *)cm;
1062                 m.msg_controllen = CONTROLLEN;
1063
1064                 cc = recvmsg(s, &m, 0);
1065                 if (cc < 0) {
1066                         if (errno != EINTR) {
1067                                 warn("recvmsg");
1068                                 sleep(1);
1069                         }
1070                         continue;
1071                 } else if (cc == 0) {
1072                         int mtu;
1073
1074                         /*
1075                          * receive control messages only. Process the
1076                          * exceptions (currently the only possiblity is
1077                          * a path MTU notification.)
1078                          */
1079                         if ((mtu = get_pathmtu(&m)) > 0) {
1080                                 if ((options & F_VERBOSE) != 0) {
1081                                         printf("new path MTU (%d) is "
1082                                             "notified\n", mtu);
1083                                 }
1084                         }
1085                         continue;
1086                 } else {
1087                         /*
1088                          * an ICMPv6 message (probably an echoreply) arrived.
1089                          */
1090                         pr_pack(packet, cc, &m);
1091                 }
1092                 if (npackets && nreceived >= npackets)
1093                         break;
1094         }
1095         summary();
1096         exit(nreceived == 0);
1097 }
1098
1099 void
1100 onsignal(int sig)
1101 {
1102         switch (sig) {
1103         case SIGALRM:
1104                 seenalrm++;
1105                 break;
1106         case SIGINT:
1107                 seenint++;
1108                 break;
1109 #ifdef SIGINFO
1110         case SIGINFO:
1111                 seeninfo++;
1112                 break;
1113 #endif
1114         }
1115 }
1116
1117 /*
1118  * retransmit --
1119  *      This routine transmits another ping6.
1120  */
1121 void
1122 retransmit(void)
1123 {
1124         struct itimerval itimer;
1125
1126         if (pinger() == 0)
1127                 return;
1128
1129         /*
1130          * If we're not transmitting any more packets, change the timer
1131          * to wait two round-trip times if we've received any packets or
1132          * ten seconds if we haven't.
1133          */
1134 #define MAXWAIT         10
1135         if (nreceived) {
1136                 itimer.it_value.tv_sec =  2 * tmax / 1000;
1137                 if (itimer.it_value.tv_sec == 0)
1138                         itimer.it_value.tv_sec = 1;
1139         } else
1140                 itimer.it_value.tv_sec = MAXWAIT;
1141         itimer.it_interval.tv_sec = 0;
1142         itimer.it_interval.tv_usec = 0;
1143         itimer.it_value.tv_usec = 0;
1144
1145         signal(SIGALRM, onint);
1146         setitimer(ITIMER_REAL, &itimer, NULL);
1147 }
1148
1149 /*
1150  * pinger --
1151  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1152  * will be added on by the kernel.  The ID field is our UNIX process ID,
1153  * and the sequence number is an ascending integer.  The first 8 bytes
1154  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1155  * byte-order, to compute the round-trip time.
1156  */
1157 size_t
1158 pingerlen(void)
1159 {
1160         size_t l;
1161
1162         if (options & F_FQDN)
1163                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1164         else if (options & F_FQDNOLD)
1165                 l = ICMP6_NIQLEN;
1166         else if (options & F_NODEADDR)
1167                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1168         else if (options & F_SUPTYPES)
1169                 l = ICMP6_NIQLEN;
1170         else
1171                 l = ICMP6ECHOLEN + datalen;
1172
1173         return l;
1174 }
1175
1176 int
1177 pinger(void)
1178 {
1179         struct icmp6_hdr *icp;
1180         struct iovec iov[2];
1181         int i, cc;
1182         struct icmp6_nodeinfo *nip;
1183         int seq;
1184
1185         if (npackets && ntransmitted >= npackets)
1186                 return(-1);     /* no more transmission */
1187
1188         icp = (struct icmp6_hdr *)outpack;
1189         nip = (struct icmp6_nodeinfo *)outpack;
1190         memset(icp, 0, sizeof(*icp));
1191         icp->icmp6_cksum = 0;
1192         seq = ntransmitted++;
1193         CLR(seq % mx_dup_ck);
1194
1195         if (options & F_FQDN) {
1196                 icp->icmp6_type = ICMP6_NI_QUERY;
1197                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1198                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1199                 nip->ni_flags = htons(0);
1200
1201                 memcpy(nip->icmp6_ni_nonce, nonce,
1202                     sizeof(nip->icmp6_ni_nonce));
1203                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1204
1205                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1206                     sizeof(dst.sin6_addr));
1207                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1208                 datalen = 0;
1209         } else if (options & F_FQDNOLD) {
1210                 /* packet format in 03 draft - no Subject data on queries */
1211                 icp->icmp6_type = ICMP6_NI_QUERY;
1212                 icp->icmp6_code = 0;    /* code field is always 0 */
1213                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1214                 nip->ni_flags = htons(0);
1215
1216                 memcpy(nip->icmp6_ni_nonce, nonce,
1217                     sizeof(nip->icmp6_ni_nonce));
1218                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1219
1220                 cc = ICMP6_NIQLEN;
1221                 datalen = 0;
1222         } else if (options & F_NODEADDR) {
1223                 icp->icmp6_type = ICMP6_NI_QUERY;
1224                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1225                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1226                 nip->ni_flags = naflags;
1227
1228                 memcpy(nip->icmp6_ni_nonce, nonce,
1229                     sizeof(nip->icmp6_ni_nonce));
1230                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1231
1232                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1233                     sizeof(dst.sin6_addr));
1234                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1235                 datalen = 0;
1236         } else if (options & F_SUPTYPES) {
1237                 icp->icmp6_type = ICMP6_NI_QUERY;
1238                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1239                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1240                 /* we support compressed bitmap */
1241                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1242
1243                 memcpy(nip->icmp6_ni_nonce, nonce,
1244                     sizeof(nip->icmp6_ni_nonce));
1245                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1246                 cc = ICMP6_NIQLEN;
1247                 datalen = 0;
1248         } else {
1249                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1250                 icp->icmp6_code = 0;
1251                 icp->icmp6_id = htons(ident);
1252                 icp->icmp6_seq = ntohs(seq);
1253                 if (timing) {
1254                         struct timeval tv;
1255                         struct tv32 *tv32;
1256                         gettimeofday(&tv, NULL);
1257                         tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1258                         tv32->tv32_sec = htonl(tv.tv_sec);
1259                         tv32->tv32_usec = htonl(tv.tv_usec);
1260                 }
1261                 cc = ICMP6ECHOLEN + datalen;
1262         }
1263
1264 #ifdef DIAGNOSTIC
1265         if (pingerlen() != cc)
1266                 errx(1, "internal error; length mismatch");
1267 #endif
1268
1269         smsghdr.msg_name = (caddr_t)&dst;
1270         smsghdr.msg_namelen = sizeof(dst);
1271         memset(&iov, 0, sizeof(iov));
1272         iov[0].iov_base = (caddr_t)outpack;
1273         iov[0].iov_len = cc;
1274         smsghdr.msg_iov = iov;
1275         smsghdr.msg_iovlen = 1;
1276
1277         i = sendmsg(s, &smsghdr, 0);
1278
1279         if (i < 0 || i != cc)  {
1280                 if (i < 0)
1281                         warn("sendmsg");
1282                 printf("ping6: wrote %s %d chars, ret=%d\n", hostname, cc, i);
1283         }
1284         if (!(options & F_QUIET) && options & F_FLOOD)
1285                 write(STDOUT_FILENO, &DOT, 1);
1286
1287         return(0);
1288 }
1289
1290 int
1291 myechoreply(const struct icmp6_hdr *icp)
1292 {
1293         if (ntohs(icp->icmp6_id) == ident)
1294                 return 1;
1295         else
1296                 return 0;
1297 }
1298
1299 int
1300 mynireply(const struct icmp6_nodeinfo *nip)
1301 {
1302         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1303             nonce + sizeof(u_int16_t),
1304             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1305                 return 1;
1306         else
1307                 return 0;
1308 }
1309
1310 char *
1311 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1312           size_t bufsiz)
1313 {
1314         int i = 0;
1315         const u_char *cp;
1316         char cresult[MAXDNAME + 1];
1317         const u_char *comp;
1318         int l;
1319
1320         cp = *sp;
1321         *buf = '\0';
1322
1323         if (cp >= ep)
1324                 return NULL;
1325         while (cp < ep) {
1326                 i = *cp;
1327                 if (i == 0 || cp != *sp) {
1328                         if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1329                                 return NULL;    /*result overrun*/
1330                 }
1331                 if (i == 0)
1332                         break;
1333                 cp++;
1334
1335                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1336                         /* DNS compression */
1337                         if (!base)
1338                                 return NULL;
1339
1340                         comp = base + (i & 0x3f);
1341                         if (dnsdecode(&comp, cp, base, cresult,
1342                             sizeof(cresult)) == NULL)
1343                                 return NULL;
1344                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1345                                 return NULL;    /*result overrun*/
1346                         break;
1347                 } else if ((i & 0x3f) == i) {
1348                         if (i > ep - cp)
1349                                 return NULL;    /*source overrun*/
1350                         while (i-- > 0 && cp < ep) {
1351                                 l = snprintf(cresult, sizeof(cresult),
1352                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1353                                 if (l >= (int)sizeof(cresult) || l < 0)
1354                                         return NULL;
1355                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1356                                         return NULL;    /*result overrun*/
1357                                 cp++;
1358                         }
1359                 } else
1360                         return NULL;    /*invalid label*/
1361         }
1362         if (i != 0)
1363                 return NULL;    /*not terminated*/
1364         cp++;
1365         *sp = cp;
1366         return buf;
1367 }
1368
1369 /*
1370  * pr_pack --
1371  *      Print out the packet, if it came from us.  This logic is necessary
1372  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1373  * which arrive ('tis only fair).  This permits multiple copies of this
1374  * program to be run without having intermingled output (or statistics!).
1375  */
1376 void
1377 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1378 {
1379 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1380         struct icmp6_hdr *icp;
1381         struct icmp6_nodeinfo *ni;
1382         int i;
1383         int hoplim;
1384         struct sockaddr *from;
1385         int fromlen;
1386         u_char *cp = NULL, *dp, *end = buf + cc;
1387         struct in6_pktinfo *pktinfo = NULL;
1388         struct timeval tv, tp;
1389         struct tv32 *tpp;
1390         double triptime = 0;
1391         int dupflag;
1392         size_t off;
1393         int oldfqdn;
1394         u_int16_t seq;
1395         char dnsname[MAXDNAME + 1];
1396
1397         gettimeofday(&tv, NULL);
1398
1399         if (!mhdr || !mhdr->msg_name ||
1400             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1401             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1402                 if (options & F_VERBOSE)
1403                         warnx("invalid peername");
1404                 return;
1405         }
1406         from = (struct sockaddr *)mhdr->msg_name;
1407         fromlen = mhdr->msg_namelen;
1408         if (cc < (int)sizeof(struct icmp6_hdr)) {
1409                 if (options & F_VERBOSE)
1410                         warnx("packet too short (%d bytes) from %s", cc,
1411                             pr_addr(from, fromlen));
1412                 return;
1413         }
1414         if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1415             (options & F_VERBOSE) != 0)
1416                 warnx("some control data discarded, insufficient buffer size");
1417         icp = (struct icmp6_hdr *)buf;
1418         ni = (struct icmp6_nodeinfo *)buf;
1419         off = 0;
1420
1421         if ((hoplim = get_hoplim(mhdr)) == -1) {
1422                 warnx("failed to get receiving hop limit");
1423                 return;
1424         }
1425         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1426                 warnx("failed to get receiving packet information");
1427                 return;
1428         }
1429
1430         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1431                 seq = ntohs(icp->icmp6_seq);
1432                 ++nreceived;
1433                 if (timing) {
1434                         tpp = (struct tv32 *)(icp + 1);
1435                         tp.tv_sec = ntohl(tpp->tv32_sec);
1436                         tp.tv_usec = ntohl(tpp->tv32_usec);
1437                         tvsub(&tv, &tp);
1438                         triptime = ((double)tv.tv_sec) * 1000.0 +
1439                             ((double)tv.tv_usec) / 1000.0;
1440                         tsum += triptime;
1441                         tsumsq += triptime * triptime;
1442                         if (triptime < tmin)
1443                                 tmin = triptime;
1444                         if (triptime > tmax)
1445                                 tmax = triptime;
1446                 }
1447
1448                 if (TST(seq % mx_dup_ck)) {
1449                         ++nrepeats;
1450                         --nreceived;
1451                         dupflag = 1;
1452                 } else {
1453                         SET(seq % mx_dup_ck);
1454                         dupflag = 0;
1455                 }
1456
1457                 if (options & F_QUIET)
1458                         return;
1459
1460                 if (options & F_FLOOD)
1461                         write(STDOUT_FILENO, &BSPACE, 1);
1462                 else {
1463                         printf("%d bytes from %s, icmp_seq=%u", cc,
1464                             pr_addr(from, fromlen), seq);
1465                         printf(" hlim=%d", hoplim);
1466                         if ((options & F_VERBOSE) != 0) {
1467                                 struct sockaddr_in6 dstsa;
1468
1469                                 memset(&dstsa, 0, sizeof(dstsa));
1470                                 dstsa.sin6_family = AF_INET6;
1471                                 dstsa.sin6_len = sizeof(dstsa);
1472                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1473                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1474                                 printf(" dst=%s",
1475                                     pr_addr((struct sockaddr *)&dstsa,
1476                                     sizeof(dstsa)));
1477                         }
1478                         if (timing)
1479                                 printf(" time=%.3f ms", triptime);
1480                         if (dupflag)
1481                                 printf("(DUP!)");
1482                         /* check the data */
1483                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1484                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1485                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1486                                 if (*cp != *dp) {
1487                                         printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1488                                         break;
1489                                 }
1490                         }
1491                 }
1492         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1493                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1494                 ++nreceived;
1495                 if (TST(seq % mx_dup_ck)) {
1496                         ++nrepeats;
1497                         --nreceived;
1498                         dupflag = 1;
1499                 } else {
1500                         SET(seq % mx_dup_ck);
1501                         dupflag = 0;
1502                 }
1503
1504                 if (options & F_QUIET)
1505                         return;
1506
1507                 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1508
1509                 switch (ntohs(ni->ni_code)) {
1510                 case ICMP6_NI_SUCCESS:
1511                         break;
1512                 case ICMP6_NI_REFUSED:
1513                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1514                         goto fqdnend;
1515                 case ICMP6_NI_UNKNOWN:
1516                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1517                         goto fqdnend;
1518                 default:
1519                         printf("unknown code 0x%x, type 0x%x",
1520                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1521                         goto fqdnend;
1522                 }
1523
1524                 switch (ntohs(ni->ni_qtype)) {
1525                 case NI_QTYPE_NOOP:
1526                         printf("NodeInfo NOOP");
1527                         break;
1528                 case NI_QTYPE_SUPTYPES:
1529                         pr_suptypes(ni, end - (u_char *)ni);
1530                         break;
1531                 case NI_QTYPE_NODEADDR:
1532                         pr_nodeaddr(ni, end - (u_char *)ni);
1533                         break;
1534                 case NI_QTYPE_FQDN:
1535                 default:        /* XXX: for backward compatibility */
1536                         cp = (u_char *)ni + ICMP6_NIRLEN;
1537                         if (buf[off + ICMP6_NIRLEN] ==
1538                             cc - off - ICMP6_NIRLEN - 1)
1539                                 oldfqdn = 1;
1540                         else
1541                                 oldfqdn = 0;
1542                         if (oldfqdn) {
1543                                 cp++;   /* skip length */
1544                                 while (cp < end) {
1545                                         safeputc(*cp & 0xff);
1546                                         cp++;
1547                                 }
1548                         } else {
1549                                 i = 0;
1550                                 while (cp < end) {
1551                                         if (dnsdecode((const u_char **)&cp, end,
1552                                             (const u_char *)(ni + 1), dnsname,
1553                                             sizeof(dnsname)) == NULL) {
1554                                                 printf("???");
1555                                                 break;
1556                                         }
1557                                         /*
1558                                          * name-lookup special handling for
1559                                          * truncated name
1560                                          */
1561                                         if (cp + 1 <= end && !*cp &&
1562                                             strlen(dnsname) > 0) {
1563                                                 dnsname[strlen(dnsname) - 1] = '\0';
1564                                                 cp++;
1565                                         }
1566                                         printf("%s%s", i > 0 ? "," : "",
1567                                             dnsname);
1568                                 }
1569                         }
1570                         if (options & F_VERBOSE) {
1571                                 int32_t ttl;
1572                                 int comma = 0;
1573
1574                                 printf(" (");   /*)*/
1575
1576                                 switch (ni->ni_code) {
1577                                 case ICMP6_NI_REFUSED:
1578                                         printf("refused");
1579                                         comma++;
1580                                         break;
1581                                 case ICMP6_NI_UNKNOWN:
1582                                         printf("unknown qtype");
1583                                         comma++;
1584                                         break;
1585                                 }
1586
1587                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1588                                         /* case of refusion, unknown */
1589                                         /*(*/
1590                                         putchar(')');
1591                                         goto fqdnend;
1592                                 }
1593                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1594                                 if (comma)
1595                                         printf(",");
1596                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1597                                         printf("TTL=%d:meaningless",
1598                                             (int)ttl);
1599                                 } else {
1600                                         if (ttl < 0) {
1601                                                 printf("TTL=%d:invalid", ttl);
1602                                         } else
1603                                                 printf("TTL=%d", ttl);
1604                                 }
1605                                 comma++;
1606
1607                                 if (oldfqdn) {
1608                                         if (comma)
1609                                                 printf(",");
1610                                         printf("03 draft");
1611                                         comma++;
1612                                 } else {
1613                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1614                                         if (cp == end) {
1615                                                 if (comma)
1616                                                         printf(",");
1617                                                 printf("no name");
1618                                                 comma++;
1619                                         }
1620                                 }
1621
1622                                 if (buf[off + ICMP6_NIRLEN] !=
1623                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1624                                         if (comma)
1625                                                 printf(",");
1626                                         printf("invalid namelen:%d/%lu",
1627                                             buf[off + ICMP6_NIRLEN],
1628                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1629                                         comma++;
1630                                 }
1631                                 /*(*/
1632                                 putchar(')');
1633                         }
1634                 fqdnend:
1635                         ;
1636                 }
1637         } else {
1638                 /* We've got something other than an ECHOREPLY */
1639                 if (!(options & F_VERBOSE))
1640                         return;
1641                 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1642                 pr_icmph(icp, end);
1643         }
1644
1645         if (!(options & F_FLOOD)) {
1646                 putchar('\n');
1647                 if (options & F_VERBOSE)
1648                         pr_exthdrs(mhdr);
1649                 fflush(stdout);
1650         }
1651 #undef safeputc
1652 }
1653
1654 void
1655 pr_exthdrs(struct msghdr *mhdr)
1656 {
1657         ssize_t bufsize;
1658         void    *bufp;
1659         struct cmsghdr *cm;
1660
1661         bufsize = 0;
1662         bufp = mhdr->msg_control;
1663         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1664              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1665                 if (cm->cmsg_level != IPPROTO_IPV6)
1666                         continue;
1667
1668                 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1669                 if (bufsize <= 0)
1670                         continue;
1671                 switch (cm->cmsg_type) {
1672                 case IPV6_HOPOPTS:
1673                         printf("  HbH Options: ");
1674                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1675                         break;
1676                 case IPV6_DSTOPTS:
1677 #ifdef IPV6_RTHDRDSTOPTS
1678                 case IPV6_RTHDRDSTOPTS:
1679 #endif
1680                         printf("  Dst Options: ");
1681                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1682                         break;
1683                 case IPV6_RTHDR:
1684                         printf("  Routing: ");
1685                         pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1686                         break;
1687                 }
1688         }
1689 }
1690
1691 #ifdef USE_RFC3542
1692 void
1693 pr_ip6opt(void *extbuf, size_t bufsize)
1694 {
1695         struct ip6_hbh *ext;
1696         int currentlen;
1697         u_int8_t type;
1698         socklen_t extlen, len, origextlen;
1699         void *databuf;
1700         size_t offset;
1701         u_int16_t value2;
1702         u_int32_t value4;
1703
1704         ext = (struct ip6_hbh *)extbuf;
1705         extlen = (ext->ip6h_len + 1) * 8;
1706         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1707             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1708
1709         /*
1710          * Bounds checking on the ancillary data buffer:
1711          *     subtract the size of a cmsg structure from the buffer size.
1712          */
1713         if (bufsize < (extlen  + CMSG_SPACE(0))) {
1714                 origextlen = extlen;
1715                 extlen = bufsize - CMSG_SPACE(0);
1716                 warnx("options truncated, showing only %u (total=%u)",
1717                     (unsigned int)(extlen / 8 - 1),
1718                     (unsigned int)(ext->ip6h_len));
1719         }
1720
1721         currentlen = 0;
1722         while (1) {
1723                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1724                     &type, &len, &databuf);
1725                 if (currentlen == -1)
1726                         break;
1727                 switch (type) {
1728                 /*
1729                  * Note that inet6_opt_next automatically skips any padding
1730                  * optins.
1731                  */
1732                 case IP6OPT_JUMBO:
1733                         offset = 0;
1734                         offset = inet6_opt_get_val(databuf, offset,
1735                             &value4, sizeof(value4));
1736                         printf("    Jumbo Payload Opt: Length %u\n",
1737                             (u_int32_t)ntohl(value4));
1738                         break;
1739                 /* FIXME: RFC3542 option is IP6OPT_ROUTER_ALERT. */
1740                 case IP6OPT_RTALERT:
1741                         offset = 0;
1742                         offset = inet6_opt_get_val(databuf, offset,
1743                                                    &value2, sizeof(value2));
1744                         printf("    Router Alert Opt: Type %u\n",
1745                             ntohs(value2));
1746                         break;
1747                 default:
1748                         printf("    Received Opt %u len %lu\n",
1749                             type, (unsigned long)len);
1750                         break;
1751                 }
1752         }
1753         return;
1754 }
1755 #else  /* !USE_RFC3542 */
1756 /* ARGSUSED */
1757 void
1758 pr_ip6opt(void *extbuf __unused, size_t bufsize __unused)
1759 {
1760         putchar('\n');
1761         return;
1762 }
1763 #endif /* USE_RFC3542 */
1764
1765 #ifdef USE_RFC3542
1766 void
1767 pr_rthdr(void *extbuf, size_t bufsize __unused)
1768 {
1769         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1770
1771         /* print fixed part of the header */
1772         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1773             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1774         printf("segments unknown, ");
1775         printf("%d left\n", rh->ip6r_segleft);
1776         return;
1777
1778 }
1779
1780 #else  /* !USE_RFC3542 */
1781 /* ARGSUSED */
1782 void
1783 pr_rthdr(void *extbuf __unused)
1784 {
1785         putchar('\n');
1786         return;
1787 }
1788 #endif /* USE_RFC3542 */
1789
1790 int
1791 pr_bitrange(u_int32_t v, int soff, int ii)
1792 {
1793         int off;
1794         int i;
1795
1796         off = 0;
1797         while (off < 32) {
1798                 /* shift till we have 0x01 */
1799                 if ((v & 0x01) == 0) {
1800                         if (ii > 1)
1801                                 printf("-%u", soff + off - 1);
1802                         ii = 0;
1803                         switch (v & 0x0f) {
1804                         case 0x00:
1805                                 v >>= 4;
1806                                 off += 4;
1807                                 continue;
1808                         case 0x08:
1809                                 v >>= 3;
1810                                 off += 3;
1811                                 continue;
1812                         case 0x04: case 0x0c:
1813                                 v >>= 2;
1814                                 off += 2;
1815                                 continue;
1816                         default:
1817                                 v >>= 1;
1818                                 off += 1;
1819                                 continue;
1820                         }
1821                 }
1822
1823                 /* we have 0x01 with us */
1824                 for (i = 0; i < 32 - off; i++) {
1825                         if ((v & (0x01 << i)) == 0)
1826                                 break;
1827                 }
1828                 if (!ii)
1829                         printf(" %u", soff + off);
1830                 ii += i;
1831                 v >>= i; off += i;
1832         }
1833         return ii;
1834 }
1835
1836 /* struct icmp6_nodeinfo *ni:   ni->qtype must be SUPTYPES */
1837 void
1838 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1839 {
1840         size_t clen;
1841         u_int32_t v;
1842         const u_char *cp, *end;
1843         u_int16_t cur;
1844         struct cbit {
1845                 u_int16_t words;        /*32bit count*/
1846                 u_int16_t skip;
1847         } cbit;
1848 #define MAXQTYPES       (1 << 16)
1849         size_t off;
1850         int b;
1851
1852         cp = (u_char *)(ni + 1);
1853         end = ((u_char *)ni) + nilen;
1854         cur = 0;
1855         b = 0;
1856
1857         printf("NodeInfo Supported Qtypes");
1858         if (options & F_VERBOSE) {
1859                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
1860                         printf(", compressed bitmap");
1861                 else
1862                         printf(", raw bitmap");
1863         }
1864
1865         while (cp < end) {
1866                 clen = (size_t)(end - cp);
1867                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
1868                         if (clen == 0 || clen > MAXQTYPES / 8 ||
1869                             clen % sizeof(v)) {
1870                                 printf("???");
1871                                 return;
1872                         }
1873                 } else {
1874                         if (clen < sizeof(cbit) || clen % sizeof(v))
1875                                 return;
1876                         memcpy(&cbit, cp, sizeof(cbit));
1877                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
1878                             clen)
1879                                 return;
1880                         cp += sizeof(cbit);
1881                         clen = ntohs(cbit.words) * sizeof(v);
1882                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
1883                             MAXQTYPES)
1884                                 return;
1885                 }
1886
1887                 for (off = 0; off < clen; off += sizeof(v)) {
1888                         memcpy(&v, cp + off, sizeof(v));
1889                         v = (u_int32_t)ntohl(v);
1890                         b = pr_bitrange(v, (int)(cur + off * 8), b);
1891                 }
1892                 /* flush the remaining bits */
1893                 b = pr_bitrange(0, (int)(cur + off * 8), b);
1894
1895                 cp += clen;
1896                 cur += clen * 8;
1897                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
1898                         cur += ntohs(cbit.skip) * 32;
1899         }
1900 }
1901
1902 /* struct icmp6_nodeinfo *ni:   ni->qtype must be NODEADDR */
1903 void
1904 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
1905 {
1906         u_char *cp = (u_char *)(ni + 1);
1907         char ntop_buf[INET6_ADDRSTRLEN];
1908         int withttl = 0;
1909
1910         nilen -= sizeof(struct icmp6_nodeinfo);
1911
1912         if (options & F_VERBOSE) {
1913                 switch (ni->ni_code) {
1914                 case ICMP6_NI_REFUSED:
1915                         printf("refused");
1916                         break;
1917                 case ICMP6_NI_UNKNOWN:
1918                         printf("unknown qtype");
1919                         break;
1920                 }
1921                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
1922                         printf(" truncated");
1923         }
1924         putchar('\n');
1925         if (nilen <= 0)
1926                 printf("  no address\n");
1927
1928         /*
1929          * In icmp-name-lookups 05 and later, TTL of each returned address
1930          * is contained in the resposne. We try to detect the version
1931          * by the length of the data, but note that the detection algorithm
1932          * is incomplete. We assume the latest draft by default.
1933          */
1934         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
1935                 withttl = 1;
1936         while (nilen > 0) {
1937                 u_int32_t ttl = 0;
1938
1939                 if (withttl) {
1940                         /* XXX: alignment? */
1941                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
1942                         cp += sizeof(u_int32_t);
1943                         nilen -= sizeof(u_int32_t);
1944                 }
1945
1946                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
1947                     NULL)
1948                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
1949                 printf("  %s", ntop_buf);
1950                 if (withttl) {
1951                         if (ttl == 0xffffffff) {
1952                                 /*
1953                                  * XXX: can this convention be applied to all
1954                                  * type of TTL (i.e. non-ND TTL)?
1955                                  */
1956                                 printf("(TTL=infty)");
1957                         }
1958                         else
1959                                 printf("(TTL=%u)", ttl);
1960                 }
1961                 putchar('\n');
1962
1963                 nilen -= sizeof(struct in6_addr);
1964                 cp += sizeof(struct in6_addr);
1965         }
1966 }
1967
1968 int
1969 get_hoplim(struct msghdr *mhdr)
1970 {
1971         struct cmsghdr *cm;
1972
1973         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1974              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1975                 if (cm->cmsg_len == 0)
1976                         return(-1);
1977
1978                 if (cm->cmsg_level == IPPROTO_IPV6 &&
1979                     cm->cmsg_type == IPV6_HOPLIMIT &&
1980                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
1981                         return(*(int *)CMSG_DATA(cm));
1982         }
1983
1984         return(-1);
1985 }
1986
1987 struct in6_pktinfo *
1988 get_rcvpktinfo(struct msghdr *mhdr)
1989 {
1990         struct cmsghdr *cm;
1991
1992         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1993              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1994                 if (cm->cmsg_len == 0)
1995                         return(NULL);
1996
1997                 if (cm->cmsg_level == IPPROTO_IPV6 &&
1998                     cm->cmsg_type == IPV6_PKTINFO &&
1999                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2000                         return((struct in6_pktinfo *)CMSG_DATA(cm));
2001         }
2002
2003         return(NULL);
2004 }
2005
2006 #ifdef IPV6_RECVPATHMTU
2007 int
2008 get_pathmtu(struct msghdr *mhdr)
2009 {
2010         struct cmsghdr *cm;
2011         struct ip6_mtuinfo *mtuctl = NULL;
2012
2013         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2014              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2015                 if (cm->cmsg_len == 0)
2016                         return(0);
2017
2018                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2019                     cm->cmsg_type == IPV6_PATHMTU &&
2020                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2021                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2022
2023                         /*
2024                          * If the notified destination is different from
2025                          * the one we are pinging, just ignore the info.
2026                          * We check the scope ID only when both notified value
2027                          * and our own value have non-0 values, because we may
2028                          * have used the default scope zone ID for sending,
2029                          * in which case the scope ID value is 0.
2030                          */
2031                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2032                                                 &dst.sin6_addr) ||
2033                             (mtuctl->ip6m_addr.sin6_scope_id &&
2034                              dst.sin6_scope_id &&
2035                              mtuctl->ip6m_addr.sin6_scope_id !=
2036                              dst.sin6_scope_id)) {
2037                                 if ((options & F_VERBOSE) != 0) {
2038                                         printf("path MTU for %s is notified. "
2039                                                "(ignored)\n",
2040                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2041                                            sizeof(mtuctl->ip6m_addr)));
2042                                 }
2043                                 return(0);
2044                         }
2045
2046                         /*
2047                          * Ignore an invalid MTU. XXX: can we just believe
2048                          * the kernel check?
2049                          */
2050                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2051                                 return(0);
2052
2053                         /* notification for our destination. return the MTU. */
2054                         return((int)mtuctl->ip6m_mtu);
2055                 }
2056         }
2057         return(0);
2058 }
2059 #endif
2060
2061 /*
2062  * tvsub --
2063  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2064  * be >= in.
2065  */
2066 void
2067 tvsub(struct timeval *out, struct timeval *in)
2068 {
2069         if ((out->tv_usec -= in->tv_usec) < 0) {
2070                 --out->tv_sec;
2071                 out->tv_usec += 1000000;
2072         }
2073         out->tv_sec -= in->tv_sec;
2074 }
2075
2076 /*
2077  * onint --
2078  *      SIGINT handler.
2079  */
2080 /* ARGSUSED */
2081 void
2082 onint(int sig __unused)
2083 {
2084         summary();
2085
2086         signal(SIGINT, SIG_DFL);
2087         kill(getpid(), SIGINT);
2088
2089         /* NOTREACHED */
2090         exit(1);
2091 }
2092
2093 /*
2094  * summary --
2095  *      Print out statistics.
2096  */
2097 void
2098 summary(void)
2099 {
2100
2101         printf("\n--- %s ping6 statistics ---\n", hostname);
2102         printf("%ld packets transmitted, ", ntransmitted);
2103         printf("%ld packets received, ", nreceived);
2104         if (nrepeats)
2105                 printf("+%ld duplicates, ", nrepeats);
2106         if (ntransmitted) {
2107                 if (nreceived > ntransmitted)
2108                         printf("-- somebody's duplicating packets!");
2109                 else
2110                         printf("%.1f%% packet loss",
2111                             ((((double)ntransmitted - nreceived) * 100.0) /
2112                             ntransmitted));
2113         }
2114         putchar('\n');
2115         if (nreceived && timing) {
2116                 /* Only display average to microseconds */
2117                 double num = nreceived + nrepeats;
2118                 double avg = tsum / num;
2119                 double dev = sqrt(tsumsq / num - avg * avg);
2120                 printf(
2121                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2122                     tmin, avg, tmax, dev);
2123                 fflush(stdout);
2124         }
2125         fflush(stdout);
2126 }
2127
2128 /*subject type*/
2129 static const char *niqcode[] = {
2130         "IPv6 address",
2131         "DNS label",    /*or empty*/
2132         "IPv4 address",
2133 };
2134
2135 /*result code*/
2136 static const char *nircode[] = {
2137         "Success", "Refused", "Unknown",
2138 };
2139
2140
2141 /*
2142  * pr_icmph --
2143  *      Print a descriptive string about an ICMP header.
2144  */
2145 void
2146 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2147 {
2148         char ntop_buf[INET6_ADDRSTRLEN];
2149         struct nd_redirect *red;
2150         struct icmp6_nodeinfo *ni;
2151         char dnsname[MAXDNAME + 1];
2152         const u_char *cp;
2153         size_t l;
2154
2155         switch (icp->icmp6_type) {
2156         case ICMP6_DST_UNREACH:
2157                 switch (icp->icmp6_code) {
2158                 case ICMP6_DST_UNREACH_NOROUTE:
2159                         printf("No Route to Destination\n");
2160                         break;
2161                 case ICMP6_DST_UNREACH_ADMIN:
2162                         printf("Destination Administratively "
2163                             "Unreachable\n");
2164                         break;
2165                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2166                         printf("Destination Unreachable Beyond Scope\n");
2167                         break;
2168                 case ICMP6_DST_UNREACH_ADDR:
2169                         printf("Destination Host Unreachable\n");
2170                         break;
2171                 case ICMP6_DST_UNREACH_NOPORT:
2172                         printf("Destination Port Unreachable\n");
2173                         break;
2174                 default:
2175                         printf("Destination Unreachable, Bad Code: %d\n",
2176                             icp->icmp6_code);
2177                         break;
2178                 }
2179                 /* Print returned IP header information */
2180                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2181                 break;
2182         case ICMP6_PACKET_TOO_BIG:
2183                 printf("Packet too big mtu = %d\n",
2184                     (int)ntohl(icp->icmp6_mtu));
2185                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2186                 break;
2187         case ICMP6_TIME_EXCEEDED:
2188                 switch (icp->icmp6_code) {
2189                 case ICMP6_TIME_EXCEED_TRANSIT:
2190                         printf("Time to live exceeded\n");
2191                         break;
2192                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2193                         printf("Frag reassembly time exceeded\n");
2194                         break;
2195                 default:
2196                         printf("Time exceeded, Bad Code: %d\n",
2197                             icp->icmp6_code);
2198                         break;
2199                 }
2200                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2201                 break;
2202         case ICMP6_PARAM_PROB:
2203                 printf("Parameter problem: ");
2204                 switch (icp->icmp6_code) {
2205                 case ICMP6_PARAMPROB_HEADER:
2206                         printf("Erroneous Header ");
2207                         break;
2208                 case ICMP6_PARAMPROB_NEXTHEADER:
2209                         printf("Unknown Nextheader ");
2210                         break;
2211                 case ICMP6_PARAMPROB_OPTION:
2212                         printf("Unrecognized Option ");
2213                         break;
2214                 default:
2215                         printf("Bad code(%d) ", icp->icmp6_code);
2216                         break;
2217                 }
2218                 printf("pointer = 0x%02x\n", (u_int32_t)ntohl(icp->icmp6_pptr));
2219                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2220                 break;
2221         case ICMP6_ECHO_REQUEST:
2222                 printf("Echo Request");
2223                 /* XXX ID + Seq + Data */
2224                 break;
2225         case ICMP6_ECHO_REPLY:
2226                 printf("Echo Reply");
2227                 /* XXX ID + Seq + Data */
2228                 break;
2229         case ICMP6_MEMBERSHIP_QUERY:
2230                 printf("Listener Query");
2231                 break;
2232         case ICMP6_MEMBERSHIP_REPORT:
2233                 printf("Listener Report");
2234                 break;
2235         case ICMP6_MEMBERSHIP_REDUCTION:
2236                 printf("Listener Done");
2237                 break;
2238         case ND_ROUTER_SOLICIT:
2239                 printf("Router Solicitation");
2240                 break;
2241         case ND_ROUTER_ADVERT:
2242                 printf("Router Advertisement");
2243                 break;
2244         case ND_NEIGHBOR_SOLICIT:
2245                 printf("Neighbor Solicitation");
2246                 break;
2247         case ND_NEIGHBOR_ADVERT:
2248                 printf("Neighbor Advertisement");
2249                 break;
2250         case ND_REDIRECT:
2251                 red = (struct nd_redirect *)icp;
2252                 printf("Redirect\n");
2253                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2254                     sizeof(ntop_buf)))
2255                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2256                 printf("Destination: %s", ntop_buf);
2257                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2258                     sizeof(ntop_buf)))
2259                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2260                 printf(" New Target: %s", ntop_buf);
2261                 break;
2262         case ICMP6_NI_QUERY:
2263                 printf("Node Information Query");
2264                 /* XXX ID + Seq + Data */
2265                 ni = (struct icmp6_nodeinfo *)icp;
2266                 l = end - (u_char *)(ni + 1);
2267                 printf(", ");
2268                 switch (ntohs(ni->ni_qtype)) {
2269                 case NI_QTYPE_NOOP:
2270                         printf("NOOP");
2271                         break;
2272                 case NI_QTYPE_SUPTYPES:
2273                         printf("Supported qtypes");
2274                         break;
2275                 case NI_QTYPE_FQDN:
2276                         printf("DNS name");
2277                         break;
2278                 case NI_QTYPE_NODEADDR:
2279                         printf("nodeaddr");
2280                         break;
2281                 case NI_QTYPE_IPV4ADDR:
2282                         printf("IPv4 nodeaddr");
2283                         break;
2284                 default:
2285                         printf("unknown qtype");
2286                         break;
2287                 }
2288                 if (options & F_VERBOSE) {
2289                         switch (ni->ni_code) {
2290                         case ICMP6_NI_SUBJ_IPV6:
2291                                 if (l == sizeof(struct in6_addr) &&
2292                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2293                                     sizeof(ntop_buf)) != NULL) {
2294                                         printf(", subject=%s(%s)",
2295                                             niqcode[ni->ni_code], ntop_buf);
2296                                 } else {
2297 #if 1
2298                                         /* backward compat to -W */
2299                                         printf(", oldfqdn");
2300 #else
2301                                         printf(", invalid");
2302 #endif
2303                                 }
2304                                 break;
2305                         case ICMP6_NI_SUBJ_FQDN:
2306                                 if (end == (u_char *)(ni + 1)) {
2307                                         printf(", no subject");
2308                                         break;
2309                                 }
2310                                 printf(", subject=%s", niqcode[ni->ni_code]);
2311                                 cp = (const u_char *)(ni + 1);
2312                                 if (dnsdecode(&cp, end, NULL, dnsname,
2313                                     sizeof(dnsname)) != NULL)
2314                                         printf("(%s)", dnsname);
2315                                 else
2316                                         printf("(invalid)");
2317                                 break;
2318                         case ICMP6_NI_SUBJ_IPV4:
2319                                 if (l == sizeof(struct in_addr) &&
2320                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2321                                     sizeof(ntop_buf)) != NULL) {
2322                                         printf(", subject=%s(%s)",
2323                                             niqcode[ni->ni_code], ntop_buf);
2324                                 } else
2325                                         printf(", invalid");
2326                                 break;
2327                         default:
2328                                 printf(", invalid");
2329                                 break;
2330                         }
2331                 }
2332                 break;
2333         case ICMP6_NI_REPLY:
2334                 printf("Node Information Reply");
2335                 /* XXX ID + Seq + Data */
2336                 ni = (struct icmp6_nodeinfo *)icp;
2337                 printf(", ");
2338                 switch (ntohs(ni->ni_qtype)) {
2339                 case NI_QTYPE_NOOP:
2340                         printf("NOOP");
2341                         break;
2342                 case NI_QTYPE_SUPTYPES:
2343                         printf("Supported qtypes");
2344                         break;
2345                 case NI_QTYPE_FQDN:
2346                         printf("DNS name");
2347                         break;
2348                 case NI_QTYPE_NODEADDR:
2349                         printf("nodeaddr");
2350                         break;
2351                 case NI_QTYPE_IPV4ADDR:
2352                         printf("IPv4 nodeaddr");
2353                         break;
2354                 default:
2355                         printf("unknown qtype");
2356                         break;
2357                 }
2358                 if (options & F_VERBOSE) {
2359                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2360                                 printf(", invalid");
2361                         else
2362                                 printf(", %s", nircode[ni->ni_code]);
2363                 }
2364                 break;
2365         default:
2366                 printf("Bad ICMP type: %d", icp->icmp6_type);
2367         }
2368 }
2369
2370 /*
2371  * pr_iph --
2372  *      Print an IP6 header.
2373  */
2374 void
2375 pr_iph(struct ip6_hdr *ip6)
2376 {
2377         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2378         u_int8_t tc;
2379         char ntop_buf[INET6_ADDRSTRLEN];
2380
2381         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2382         tc = (tc >> 4) & 0x0f;
2383         tc |= (ip6->ip6_vfc << 4);
2384
2385         printf("Vr TC  Flow Plen Nxt Hlim\n");
2386         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2387             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2388             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2389         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2390                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2391         printf("%s->", ntop_buf);
2392         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2393                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2394         printf("%s\n", ntop_buf);
2395 }
2396
2397 /*
2398  * pr_addr --
2399  *      Return an ascii host address as a dotted quad and optionally with
2400  * a hostname.
2401  */
2402 const char *
2403 pr_addr(struct sockaddr *addr, int addrlen)
2404 {
2405         static char buf[NI_MAXHOST];
2406         int flag = 0;
2407
2408         if ((options & F_HOSTNAME) == 0)
2409                 flag |= NI_NUMERICHOST;
2410
2411         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2412                 return (buf);
2413         else
2414                 return "?";
2415 }
2416
2417 /*
2418  * pr_retip --
2419  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2420  */
2421 void
2422 pr_retip(struct ip6_hdr *ip6, u_char *end)
2423 {
2424         u_char *cp = (u_char *)ip6, nh;
2425         int hlen;
2426
2427         if (end - (u_char *)ip6 < (int)sizeof(*ip6)) {
2428                 printf("IP6");
2429                 goto trunc;
2430         }
2431         pr_iph(ip6);
2432         hlen = sizeof(*ip6);
2433
2434         nh = ip6->ip6_nxt;
2435         cp += hlen;
2436         while (end - cp >= 8) {
2437                 switch (nh) {
2438                 case IPPROTO_HOPOPTS:
2439                         printf("HBH ");
2440                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2441                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2442                         break;
2443                 case IPPROTO_DSTOPTS:
2444                         printf("DSTOPT ");
2445                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2446                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2447                         break;
2448                 case IPPROTO_FRAGMENT:
2449                         printf("FRAG ");
2450                         hlen = sizeof(struct ip6_frag);
2451                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2452                         break;
2453                 case IPPROTO_ROUTING:
2454                         printf("RTHDR ");
2455                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2456                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2457                         break;
2458 #ifdef IPSEC
2459                 case IPPROTO_AH:
2460                         printf("AH ");
2461                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2462                         nh = ((struct ah *)cp)->ah_nxt;
2463                         break;
2464 #endif
2465                 case IPPROTO_ICMPV6:
2466                         printf("ICMP6: type = %d, code = %d\n",
2467                             *cp, *(cp + 1));
2468                         return;
2469                 case IPPROTO_ESP:
2470                         printf("ESP\n");
2471                         return;
2472                 case IPPROTO_TCP:
2473                         printf("TCP: from port %u, to port %u (decimal)\n",
2474                             (*cp * 256 + *(cp + 1)),
2475                             (*(cp + 2) * 256 + *(cp + 3)));
2476                         return;
2477                 case IPPROTO_UDP:
2478                         printf("UDP: from port %u, to port %u (decimal)\n",
2479                             (*cp * 256 + *(cp + 1)),
2480                             (*(cp + 2) * 256 + *(cp + 3)));
2481                         return;
2482                 default:
2483                         printf("Unknown Header(%d)\n", nh);
2484                         return;
2485                 }
2486
2487                 if ((cp += hlen) >= end)
2488                         goto trunc;
2489         }
2490         if (end - cp < 8)
2491                 goto trunc;
2492
2493         putchar('\n');
2494         return;
2495
2496   trunc:
2497         printf("...\n");
2498         return;
2499 }
2500
2501 void
2502 fill(char *bp, char *patp)
2503 {
2504         int ii, jj, kk;
2505         int pat[16];
2506         char *cp;
2507
2508         for (cp = patp; *cp; cp++)
2509                 if (!isxdigit(*cp))
2510                         errx(1, "patterns must be specified as hex digits");
2511         ii = sscanf(patp,
2512             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2513             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2514             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2515             &pat[13], &pat[14], &pat[15]);
2516
2517 /* xxx */
2518         if (ii > 0)
2519                 for (kk = 0;
2520                     kk <= MAXDATALEN - (8 + (int)sizeof(struct tv32) + ii);
2521                     kk += ii)
2522                         for (jj = 0; jj < ii; ++jj)
2523                                 bp[jj + kk] = pat[jj];
2524         if (!(options & F_QUIET)) {
2525                 printf("PATTERN: 0x");
2526                 for (jj = 0; jj < ii; ++jj)
2527                         printf("%02x", bp[jj] & 0xFF);
2528                 printf("\n");
2529         }
2530 }
2531
2532 #ifdef IPSEC
2533 #ifdef IPSEC_POLICY_IPSEC
2534 int
2535 setpolicy(int so __unused, char *policy)
2536 {
2537         char *buf;
2538
2539         if (policy == NULL)
2540                 return 0;       /* ignore */
2541
2542         buf = ipsec_set_policy(policy, strlen(policy));
2543         if (buf == NULL)
2544                 errx(1, "%s", ipsec_strerror());
2545         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2546             ipsec_get_policylen(buf)) < 0)
2547                 warnx("Unable to set IPsec policy");
2548         free(buf);
2549
2550         return 0;
2551 }
2552 #endif
2553 #endif
2554
2555 char *
2556 nigroup(char *name)
2557 {
2558         char *p;
2559         char *q;
2560         MD5_CTX ctxt;
2561         u_int8_t digest[16];
2562         u_int8_t c;
2563         size_t l;
2564         char hbuf[NI_MAXHOST];
2565         struct in6_addr in6;
2566
2567         p = strchr(name, '.');
2568         if (!p)
2569                 p = name + strlen(name);
2570         l = p - name;
2571         if (l > 63 || l > sizeof(hbuf) - 1)
2572                 return NULL;    /*label too long*/
2573         strncpy(hbuf, name, l);
2574         hbuf[(int)l] = '\0';
2575
2576         for (q = name; *q; q++) {
2577                 if (isupper(*(unsigned char *)q))
2578                         *q = tolower(*(unsigned char *)q);
2579         }
2580
2581         /* generate 8 bytes of pseudo-random value. */
2582         memset(&ctxt, 0, sizeof(ctxt));
2583         MD5Init(&ctxt);
2584         c = l & 0xff;
2585         MD5Update(&ctxt, &c, sizeof(c));
2586         MD5Update(&ctxt, (unsigned char *)name, l);
2587         MD5Final(digest, &ctxt);
2588
2589         if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1)
2590                 return NULL;    /*XXX*/
2591         bcopy(digest, &in6.s6_addr[12], 4);
2592
2593         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2594                 return NULL;
2595
2596         return strdup(hbuf);
2597 }
2598
2599 void
2600 usage(void)
2601 {
2602         fprintf(stderr,
2603 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2604             "A"
2605 #endif
2606             "usage: ping6 [-"
2607             "d"
2608 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2609             "E"
2610 #endif
2611             "fH"
2612 #ifdef IPV6_USE_MIN_MTU
2613             "m"
2614 #endif
2615             "nNqtvwW] "
2616             "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2617             "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2618 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2619             " [-P policy]"
2620 #endif
2621             "\n"
2622             "             [-p pattern] [-S sourceaddr] [-s packetsize] "
2623             "[hops ...] host\n");
2624         exit(1);
2625 }