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
  32 /*      BSDI    ping.c,v 2.3 1996/01/21 17:56:50 jch Exp        */
  33
  34 /*
  35  * Copyright (c) 1989, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * Mike Muuss.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *      This product includes software developed by the University of
  52  *      California, Berkeley and its contributors.
  53  * 4. Neither the name of the University nor the names of its contributors
  54  *    may be used to endorse or promote products derived from this software
  55  *    without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  58  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  60  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  61  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  62  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  63  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  64  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  65  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 #ifndef lint
  71 static const char copyright[] =
  72 "@(#) Copyright (c) 1989, 1993\n\
  73         The Regents of the University of California.  All rights reserved.\n";
  74 #endif /* not lint */
  75
  76 #ifndef lint
  77 #if 0
  78 static char sccsid[] = "@(#)ping.c      8.1 (Berkeley) 6/5/93";
  79 #endif
  80 static const char rcsid[] =
  81   "$FreeBSD$";
  82 #endif /* not lint */
  83
  84 /*
  85  * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
  86  * measure round-trip-delays and packet loss across network paths.
  87  *
  88  * Author -
  89  *      Mike Muuss
  90  *      U. S. Army Ballistic Research Laboratory
  91  *      December, 1983
  92  *
  93  * Status -
  94  *      Public Domain.  Distribution Unlimited.
  95  * Bugs -
  96  *      More statistics could always be gathered.
  97  *      This program has to run SUID to ROOT to access the ICMP socket.
  98  */
  99 /*
 100  * NOTE:
 101  * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
 102  * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
 103  * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
 104  * network attached to 1 or more interfaces)
 105  */
 106
 107 #include <sys/param.h>
 108 #include <sys/uio.h>
 109 #include <sys/socket.h>
 110 #include <sys/time.h>
 111
 112 #include <net/if.h>
 113 #include <net/route.h>
 114
 115 #include <netinet/in.h>
 116 #include <netinet/ip6.h>
 117 #include <netinet/icmp6.h>
 118 #include <arpa/inet.h>
 119 #include <arpa/nameser.h>
 120 #include <netdb.h>
 121
 122 #include <ctype.h>
 123 #include <err.h>
 124 #include <errno.h>
 125 #include <fcntl.h>
 126 #include <math.h>
 127 #include <signal.h>
 128 #include <stdio.h>
 129 #include <stdlib.h>
 130 #include <string.h>
 131 #include <unistd.h>
 132 #ifdef HAVE_POLL_H
 133 #include <poll.h>
 134 #endif
 135
 136 #ifdef IPSEC
 137 #include <netipsec/ah.h>
 138 #include <netipsec/ipsec.h>
 139 #endif
 140
 141 #include <md5.h>
 142
 143 struct tv32 {
 144         u_int32_t tv32_sec;
 145         u_int32_t tv32_usec;
 146 };
 147
 148 #define MAXPACKETLEN    131072
 149 #define IP6LEN          40
 150 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 151 #define ICMP6ECHOTMLEN sizeof(struct tv32)
 152 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 153 # define CONTROLLEN     10240   /* ancillary data buffer size RFC3542 20.1 */
 154 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 155 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 156 #define EXTRA           256     /* for AH and various other headers. weird. */
 157 #define DEFDATALEN      ICMP6ECHOTMLEN
 158 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 159 #define NROUTES         9               /* number of record route slots */
 160
 161 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 162 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 163 #define SET(bit)        (A(bit) |= B(bit))
 164 #define CLR(bit)        (A(bit) &= (~B(bit)))
 165 #define TST(bit)        (A(bit) & B(bit))
 166
 167 #define F_FLOOD         0x0001
 168 #define F_INTERVAL      0x0002
 169 #define F_PINGFILLED    0x0008
 170 #define F_QUIET         0x0010
 171 #define F_RROUTE        0x0020
 172 #define F_SO_DEBUG      0x0040
 173 #define F_VERBOSE       0x0100
 174 #ifdef IPSEC
 175 #ifdef IPSEC_POLICY_IPSEC
 176 #define F_POLICY        0x0400
 177 #else
 178 #define F_AUTHHDR       0x0200
 179 #define F_ENCRYPT       0x0400
 180 #endif /*IPSEC_POLICY_IPSEC*/
 181 #endif /*IPSEC*/
 182 #define F_NODEADDR      0x0800
 183 #define F_FQDN          0x1000
 184 #define F_INTERFACE     0x2000
 185 #define F_SRCADDR       0x4000
 186 #define F_HOSTNAME      0x10000
 187 #define F_FQDNOLD       0x20000
 188 #define F_NIGROUP       0x40000
 189 #define F_SUPTYPES      0x80000
 190 #define F_NOMINMTU      0x100000
 191 #define F_ONCE          0x200000
 192 #define F_AUDIBLE       0x400000
 193 #define F_MISSED        0x800000
 194 #define F_DONTFRAG      0x1000000
 195 #define F_NOUSERDATA    (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
 196 u_int options;
 197
 198 #define IN6LEN          sizeof(struct in6_addr)
 199 #define SA6LEN          sizeof(struct sockaddr_in6)
 200 #define DUMMY_PORT      10101
 201
 202 #define SIN6(s) ((struct sockaddr_in6 *)(s))
 203
 204 /*
 205  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 206  * number of received sequence numbers we can keep track of.  Change 128
 207  * to 8192 for complete accuracy...
 208  */
 209 #define MAX_DUP_CHK     (8 * 8192)
 210 int mx_dup_ck = MAX_DUP_CHK;
 211 char rcvd_tbl[MAX_DUP_CHK / 8];
 212
 213 struct addrinfo *res;
 214 struct sockaddr_in6 dst;        /* who to ping6 */
 215 struct sockaddr_in6 src;        /* src addr of this packet */
 216 socklen_t srclen;
 217 int datalen = DEFDATALEN;
 218 int s;                          /* socket file descriptor */
 219 u_char outpack[MAXPACKETLEN];
 220 char BSPACE = '\b';             /* characters written for flood */
 221 char BBELL = '\a';              /* characters written for AUDIBLE */
 222 char DOT = '.';
 223 char *hostname;
 224 int ident;                      /* process id to identify our packets */
 225 u_int8_t nonce[8];              /* nonce field for node information */
 226 int hoplimit = -1;              /* hoplimit */
 227 int pathmtu = 0;                /* path MTU for the destination.  0 = unspec. */
 228
 229 /* counters */
 230 long nmissedmax;                /* max value of ntransmitted - nreceived - 1 */
 231 long npackets;                  /* max packets to transmit */
 232 long nreceived;                 /* # of packets we got back */
 233 long nrepeats;                  /* number of duplicates */
 234 long ntransmitted;              /* sequence # for outbound packets = #sent */
 235 struct timeval interval = {1, 0}; /* interval between packets */
 236
 237 /* timing */
 238 int timing;                     /* flag to do timing */
 239 double tmin = 999999999.0;      /* minimum round trip time */
 240 double tmax = 0.0;              /* maximum round trip time */
 241 double tsum = 0.0;              /* sum of all times, for doing average */
 242 double tsumsq = 0.0;            /* sum of all times squared, for std. dev. */
 243
 244 /* for node addresses */
 245 u_short naflags;
 246
 247 /* for ancillary data(advanced API) */
 248 struct msghdr smsghdr;
 249 struct iovec smsgiov;
 250 char *scmsg = 0;
 251
 252 volatile sig_atomic_t seenalrm;
 253 volatile sig_atomic_t seenint;
 254 #ifdef SIGINFO
 255 volatile sig_atomic_t seeninfo;
 256 #endif
 257
 258 int      main(int, char *[]);
 259 void     fill(char *, char *);
 260 int      get_hoplim(struct msghdr *);
 261 int      get_pathmtu(struct msghdr *);
 262 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
 263 void     onsignal(int);
 264 void     retransmit(void);
 265 void     onint(int);
 266 size_t   pingerlen(void);
 267 int      pinger(void);
 268 const char *pr_addr(struct sockaddr *, int);
 269 void     pr_icmph(struct icmp6_hdr *, u_char *);
 270 void     pr_iph(struct ip6_hdr *);
 271 void     pr_suptypes(struct icmp6_nodeinfo *, size_t);
 272 void     pr_nodeaddr(struct icmp6_nodeinfo *, int);
 273 int      myechoreply(const struct icmp6_hdr *);
 274 int      mynireply(const struct icmp6_nodeinfo *);
 275 char *dnsdecode(const u_char **, const u_char *, const u_char *,
 276         char *, size_t);
 277 void     pr_pack(u_char *, int, struct msghdr *);
 278 void     pr_exthdrs(struct msghdr *);
 279 void     pr_ip6opt(void *, size_t);
 280 void     pr_rthdr(void *, size_t);
 281 int      pr_bitrange(u_int32_t, int, int);
 282 void     pr_retip(struct ip6_hdr *, u_char *);
 283 void     summary(void);
 284 void     tvsub(struct timeval *, struct timeval *);
 285 int      setpolicy(int, char *);
 286 char    *nigroup(char *);
 287 void     usage(void);
 288
 289 int
 290 main(argc, argv)
 291         int argc;
 292         char *argv[];
 293 {
 294         struct itimerval itimer;
 295         struct sockaddr_in6 from;
 296 #ifndef HAVE_ARC4RANDOM
 297         struct timeval seed;
 298 #endif
 299 #ifdef HAVE_POLL_H
 300         int timeout;
 301 #else
 302         struct timeval timeout, *tv;
 303 #endif
 304         struct addrinfo hints;
 305 #ifdef HAVE_POLL_H
 306         struct pollfd fdmaskp[1];
 307 #else
 308         fd_set *fdmaskp;
 309         int fdmasks;
 310 #endif
 311         int cc, i;
 312         int ch, hold, packlen, preload, optval, ret_ga;
 313         u_char *datap, *packet;
 314         char *e, *target, *ifname = NULL, *gateway = NULL;
 315         int ip6optlen = 0;
 316         struct cmsghdr *scmsgp = NULL;
 317         struct cmsghdr *cm;
 318 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 319         u_long lsockbufsize;
 320         int sockbufsize = 0;
 321 #endif
 322         int usepktinfo = 0;
 323         struct in6_pktinfo *pktinfo = NULL;
 324 #ifdef USE_RFC2292BIS
 325         struct ip6_rthdr *rthdr = NULL;
 326 #endif
 327 #ifdef IPSEC_POLICY_IPSEC
 328         char *policy_in = NULL;
 329         char *policy_out = NULL;
 330 #endif
 331         double intval;
 332         size_t rthlen;
 333 #ifdef IPV6_USE_MIN_MTU
 334         int mflag = 0;
 335 #endif
 336
 337         /* just to be sure */
 338         memset(&smsghdr, 0, sizeof(smsghdr));
 339         memset(&smsgiov, 0, sizeof(smsgiov));
 340
 341         preload = 0;
 342         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 343 #ifndef IPSEC
 344 #define ADDOPTS
 345 #else
 346 #ifdef IPSEC_POLICY_IPSEC
 347 #define ADDOPTS "P:"
 348 #else
 349 #define ADDOPTS "AE"
 350 #endif /*IPSEC_POLICY_IPSEC*/
 351 #endif
 352         while ((ch = getopt(argc, argv,
 353             "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwW" ADDOPTS)) != -1) {
 354 #undef ADDOPTS
 355                 switch (ch) {
 356                 case 'a':
 357                 {
 358                         char *cp;
 359
 360                         options &= ~F_NOUSERDATA;
 361                         options |= F_NODEADDR;
 362                         for (cp = optarg; *cp != '\0'; cp++) {
 363                                 switch (*cp) {
 364                                 case 'a':
 365                                         naflags |= NI_NODEADDR_FLAG_ALL;
 366                                         break;
 367                                 case 'c':
 368                                 case 'C':
 369                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 370                                         break;
 371                                 case 'l':
 372                                 case 'L':
 373                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 374                                         break;
 375                                 case 's':
 376                                 case 'S':
 377                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 378                                         break;
 379                                 case 'g':
 380                                 case 'G':
 381                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 382                                         break;
 383                                 case 'A': /* experimental. not in the spec */
 384 #ifdef NI_NODEADDR_FLAG_ANYCAST
 385                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 386                                         break;
 387 #else
 388                                         errx(1,
 389 "-a A is not supported on the platform");
 390                                         /*NOTREACHED*/
 391 #endif
 392                                 default:
 393                                         usage();
 394                                         /*NOTREACHED*/
 395                                 }
 396                         }
 397                         break;
 398                 }
 399                 case 'b':
 400 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 401                         errno = 0;
 402                         e = NULL;
 403                         lsockbufsize = strtoul(optarg, &e, 10);
 404                         sockbufsize = lsockbufsize;
 405                         if (errno || !*optarg || *e ||
 406                             sockbufsize != lsockbufsize)
 407                                 errx(1, "invalid socket buffer size");
 408 #else
 409                         errx(1,
 410 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 411 #endif
 412                         break;
 413                 case 'c':
 414                         npackets = strtol(optarg, &e, 10);
 415                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 416                                 errx(1,
 417                                     "illegal number of packets -- %s", optarg);
 418                         break;
 419                 case 'D':
 420                         options |= F_DONTFRAG;
 421                         break;
 422                 case 'd':
 423                         options |= F_SO_DEBUG;
 424                         break;
 425                 case 'f':
 426                         if (getuid()) {
 427                                 errno = EPERM;
 428                                 errx(1, "Must be superuser to flood ping");
 429                         }
 430                         options |= F_FLOOD;
 431                         setbuf(stdout, (char *)NULL);
 432                         break;
 433                 case 'g':
 434                         gateway = optarg;
 435                         break;
 436                 case 'H':
 437                         options |= F_HOSTNAME;
 438                         break;
 439                 case 'h':               /* hoplimit */
 440                         hoplimit = strtol(optarg, &e, 10);
 441                         if (*optarg == '\0' || *e != '\0')
 442                                 errx(1, "illegal hoplimit %s", optarg);
 443                         if (255 < hoplimit || hoplimit < -1)
 444                                 errx(1,
 445                                     "illegal hoplimit -- %s", optarg);
 446                         break;
 447                 case 'I':
 448                         ifname = optarg;
 449                         options |= F_INTERFACE;
 450 #ifndef USE_SIN6_SCOPE_ID
 451                         usepktinfo++;
 452 #endif
 453                         break;
 454                 case 'i':               /* wait between sending packets */
 455                         intval = strtod(optarg, &e);
 456                         if (*optarg == '\0' || *e != '\0')
 457                                 errx(1, "illegal timing interval %s", optarg);
 458                         if (intval < 1 && getuid()) {
 459                                 errx(1, "%s: only root may use interval < 1s",
 460                                     strerror(EPERM));
 461                         }
 462                         interval.tv_sec = (long)intval;
 463                         interval.tv_usec =
 464                             (long)((intval - interval.tv_sec) * 1000000);
 465                         if (interval.tv_sec < 0)
 466                                 errx(1, "illegal timing interval %s", optarg);
 467                         /* less than 1/hz does not make sense */
 468                         if (interval.tv_sec == 0 && interval.tv_usec < 1) {
 469                                 warnx("too small interval, raised to .000001");
 470                                 interval.tv_usec = 1;
 471                         }
 472                         options |= F_INTERVAL;
 473                         break;
 474                 case 'l':
 475                         if (getuid()) {
 476                                 errno = EPERM;
 477                                 errx(1, "Must be superuser to preload");
 478                         }
 479                         preload = strtol(optarg, &e, 10);
 480                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 481                                 errx(1, "illegal preload value -- %s", optarg);
 482                         break;
 483                 case 'm':
 484 #ifdef IPV6_USE_MIN_MTU
 485                         mflag++;
 486                         break;
 487 #else
 488                         errx(1, "-%c is not supported on this platform", ch);
 489                         /*NOTREACHED*/
 490 #endif
 491                 case 'n':
 492                         options &= ~F_HOSTNAME;
 493                         break;
 494                 case 'N':
 495                         options |= F_NIGROUP;
 496                         break;
 497                 case 'o':
 498                         options |= F_ONCE;
 499                         break;
 500                 case 'p':               /* fill buffer with user pattern */
 501                         options |= F_PINGFILLED;
 502                         fill((char *)datap, optarg);
 503                                 break;
 504                 case 'q':
 505                         options |= F_QUIET;
 506                         break;
 507                 case 'r':
 508                         options |= F_AUDIBLE;
 509                         break;
 510                 case 'R':
 511                         options |= F_MISSED;
 512                         break;
 513                 case 'S':
 514                         memset(&hints, 0, sizeof(struct addrinfo));
 515                         hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
 516                         hints.ai_family = AF_INET6;
 517                         hints.ai_socktype = SOCK_RAW;
 518                         hints.ai_protocol = IPPROTO_ICMPV6;
 519
 520                         ret_ga = getaddrinfo(optarg, NULL, &hints, &res);
 521                         if (ret_ga) {
 522                                 errx(1, "invalid source address: %s",
 523                                      gai_strerror(ret_ga));
 524                         }
 525                         /*
 526                          * res->ai_family must be AF_INET6 and res->ai_addrlen
 527                          * must be sizeof(src).
 528                          */
 529                         memcpy(&src, res->ai_addr, res->ai_addrlen);
 530                         srclen = res->ai_addrlen;
 531                         freeaddrinfo(res);
 532                         options |= F_SRCADDR;
 533                         break;
 534                 case 's':               /* size of packet to send */
 535                         datalen = strtol(optarg, &e, 10);
 536                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 537                                 errx(1, "illegal datalen value -- %s", optarg);
 538                         if (datalen > MAXDATALEN) {
 539                                 errx(1,
 540                                     "datalen value too large, maximum is %d",
 541                                     MAXDATALEN);
 542                         }
 543                         break;
 544                 case 't':
 545                         options &= ~F_NOUSERDATA;
 546                         options |= F_SUPTYPES;
 547                         break;
 548                 case 'v':
 549                         options |= F_VERBOSE;
 550                         break;
 551                 case 'w':
 552                         options &= ~F_NOUSERDATA;
 553                         options |= F_FQDN;
 554                         break;
 555                 case 'W':
 556                         options &= ~F_NOUSERDATA;
 557                         options |= F_FQDNOLD;
 558                         break;
 559 #ifdef IPSEC
 560 #ifdef IPSEC_POLICY_IPSEC
 561                 case 'P':
 562                         options |= F_POLICY;
 563                         if (!strncmp("in", optarg, 2)) {
 564                                 if ((policy_in = strdup(optarg)) == NULL)
 565                                         errx(1, "strdup");
 566                         } else if (!strncmp("out", optarg, 3)) {
 567                                 if ((policy_out = strdup(optarg)) == NULL)
 568                                         errx(1, "strdup");
 569                         } else
 570                                 errx(1, "invalid security policy");
 571                         break;
 572 #else
 573                 case 'A':
 574                         options |= F_AUTHHDR;
 575                         break;
 576                 case 'E':
 577                         options |= F_ENCRYPT;
 578                         break;
 579 #endif /*IPSEC_POLICY_IPSEC*/
 580 #endif /*IPSEC*/
 581                 default:
 582                         usage();
 583                         /*NOTREACHED*/
 584                 }
 585         }
 586
 587         argc -= optind;
 588         argv += optind;
 589
 590         if (argc < 1) {
 591                 usage();
 592                 /*NOTREACHED*/
 593         }
 594
 595         if (argc > 1) {
 596 #ifdef IPV6_RECVRTHDR   /* 2292bis */
 597                 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
 598                     argc - 1));
 599 #else  /* RFC2292 */
 600                 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
 601 #endif
 602                 if (rthlen == 0) {
 603                         errx(1, "too many intermediate hops");
 604                         /*NOTREACHED*/
 605                 }
 606                 ip6optlen += rthlen;
 607         }
 608
 609         if (options & F_NIGROUP) {
 610                 target = nigroup(argv[argc - 1]);
 611                 if (target == NULL) {
 612                         usage();
 613                         /*NOTREACHED*/
 614                 }
 615         } else
 616                 target = argv[argc - 1];
 617
 618         /* getaddrinfo */
 619         memset(&hints, 0, sizeof(struct addrinfo));
 620         hints.ai_flags = AI_CANONNAME;
 621         hints.ai_family = AF_INET6;
 622         hints.ai_socktype = SOCK_RAW;
 623         hints.ai_protocol = IPPROTO_ICMPV6;
 624
 625         ret_ga = getaddrinfo(target, NULL, &hints, &res);
 626         if (ret_ga)
 627                 errx(1, "%s", gai_strerror(ret_ga));
 628         if (res->ai_canonname)
 629                 hostname = res->ai_canonname;
 630         else
 631                 hostname = target;
 632
 633         if (!res->ai_addr)
 634                 errx(1, "getaddrinfo failed");
 635
 636         (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
 637
 638         if ((s = socket(res->ai_family, res->ai_socktype,
 639             res->ai_protocol)) < 0)
 640                 err(1, "socket");
 641
 642         /* set the source address if specified. */
 643         if ((options & F_SRCADDR) &&
 644             bind(s, (struct sockaddr *)&src, srclen) != 0) {
 645                 err(1, "bind");
 646         }
 647
 648         /* set the gateway (next hop) if specified */
 649         if (gateway) {
 650                 struct addrinfo ghints, *gres;
 651                 int error;
 652
 653                 memset(&ghints, 0, sizeof(ghints));
 654                 ghints.ai_family = AF_INET6;
 655                 ghints.ai_socktype = SOCK_RAW;
 656                 ghints.ai_protocol = IPPROTO_ICMPV6;
 657
 658                 error = getaddrinfo(gateway, NULL, &hints, &gres);
 659                 if (error) {
 660                         errx(1, "getaddrinfo for the gateway %s: %s",
 661                              gateway, gai_strerror(error));
 662                 }
 663                 if (gres->ai_next && (options & F_VERBOSE))
 664                         warnx("gateway resolves to multiple addresses");
 665
 666                 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
 667                                gres->ai_addr, gres->ai_addrlen)) {
 668                         err(1, "setsockopt(IPV6_NEXTHOP)");
 669                 }
 670
 671                 freeaddrinfo(gres);
 672         }
 673
 674         /*
 675          * let the kerel pass extension headers of incoming packets,
 676          * for privileged socket options
 677          */
 678         if ((options & F_VERBOSE) != 0) {
 679                 int opton = 1;
 680
 681 #ifdef IPV6_RECVHOPOPTS
 682                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 683                     sizeof(opton)))
 684                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 685 #else  /* old adv. API */
 686                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 687                     sizeof(opton)))
 688                         err(1, "setsockopt(IPV6_HOPOPTS)");
 689 #endif
 690 #ifdef IPV6_RECVDSTOPTS
 691                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 692                     sizeof(opton)))
 693                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 694 #else  /* old adv. API */
 695                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 696                     sizeof(opton)))
 697                         err(1, "setsockopt(IPV6_DSTOPTS)");
 698 #endif
 699 #ifdef IPV6_RECVRTHDRDSTOPTS
 700                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 701                     sizeof(opton)))
 702                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 703 #endif
 704         }
 705
 706         /* revoke root privilege */
 707         seteuid(getuid());
 708         setuid(getuid());
 709
 710         if ((options & F_FLOOD) && (options & F_INTERVAL))
 711                 errx(1, "-f and -i incompatible options");
 712
 713         if ((options & F_NOUSERDATA) == 0) {
 714                 if (datalen >= sizeof(struct tv32)) {
 715                         /* we can time transfer */
 716                         timing = 1;
 717                 } else
 718                         timing = 0;
 719                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 720                 if (options & F_VERBOSE)
 721                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 722                 else
 723                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 724         } else {
 725                 /* suppress timing for node information query */
 726                 timing = 0;
 727                 datalen = 2048;
 728                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 729         }
 730
 731         if (!(packet = (u_char *)malloc((u_int)packlen)))
 732                 err(1, "Unable to allocate packet");
 733         if (!(options & F_PINGFILLED))
 734                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 735                         *datap++ = i;
 736
 737         ident = getpid() & 0xFFFF;
 738 #ifndef HAVE_ARC4RANDOM
 739         gettimeofday(&seed, NULL);
 740         srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident));
 741         memset(nonce, 0, sizeof(nonce));
 742         for (i = 0; i < sizeof(nonce); i += sizeof(int))
 743                 *((int *)&nonce[i]) = rand();
 744 #else
 745         memset(nonce, 0, sizeof(nonce));
 746         for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t))
 747                 *((u_int32_t *)&nonce[i]) = arc4random();
 748 #endif
 749         optval = 1;
 750         if (options & F_DONTFRAG)
 751                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG,
 752                     &optval, sizeof(optval)) == -1)
 753                         err(1, "IPV6_DONTFRAG");
 754         hold = 1;
 755
 756         if (options & F_SO_DEBUG)
 757                 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 758                     sizeof(hold));
 759         optval = IPV6_DEFHLIM;
 760         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 761                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 762                     &optval, sizeof(optval)) == -1)
 763                         err(1, "IPV6_MULTICAST_HOPS");
 764 #ifdef IPV6_USE_MIN_MTU
 765         if (mflag != 1) {
 766                 optval = mflag > 1 ? 0 : 1;
 767
 768                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 769                     &optval, sizeof(optval)) == -1)
 770                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 771         }
 772 #ifdef IPV6_RECVPATHMTU
 773         else {
 774                 optval = 1;
 775                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 776                     &optval, sizeof(optval)) == -1)
 777                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 778         }
 779 #endif /* IPV6_RECVPATHMTU */
 780 #endif /* IPV6_USE_MIN_MTU */
 781
 782 #ifdef IPSEC
 783 #ifdef IPSEC_POLICY_IPSEC
 784         if (options & F_POLICY) {
 785                 if (setpolicy(s, policy_in) < 0)
 786                         errx(1, "%s", ipsec_strerror());
 787                 if (setpolicy(s, policy_out) < 0)
 788                         errx(1, "%s", ipsec_strerror());
 789         }
 790 #else
 791         if (options & F_AUTHHDR) {
 792                 optval = IPSEC_LEVEL_REQUIRE;
 793 #ifdef IPV6_AUTH_TRANS_LEVEL
 794                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 795                     &optval, sizeof(optval)) == -1)
 796                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 797 #else /* old def */
 798                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 799                     &optval, sizeof(optval)) == -1)
 800                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 801 #endif
 802         }
 803         if (options & F_ENCRYPT) {
 804                 optval = IPSEC_LEVEL_REQUIRE;
 805                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 806                     &optval, sizeof(optval)) == -1)
 807                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 808         }
 809 #endif /*IPSEC_POLICY_IPSEC*/
 810 #endif
 811
 812 #ifdef ICMP6_FILTER
 813     {
 814         struct icmp6_filter filt;
 815         if (!(options & F_VERBOSE)) {
 816                 ICMP6_FILTER_SETBLOCKALL(&filt);
 817                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 818                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 819                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 820                 else
 821                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 822         } else {
 823                 ICMP6_FILTER_SETPASSALL(&filt);
 824         }
 825         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 826             sizeof(filt)) < 0)
 827                 err(1, "setsockopt(ICMP6_FILTER)");
 828     }
 829 #endif /*ICMP6_FILTER*/
 830
 831         /* let the kerel pass extension headers of incoming packets */
 832         if ((options & F_VERBOSE) != 0) {
 833                 int opton = 1;
 834
 835 #ifdef IPV6_RECVRTHDR
 836                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 837                     sizeof(opton)))
 838                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 839 #else  /* old adv. API */
 840                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 841                     sizeof(opton)))
 842                         err(1, "setsockopt(IPV6_RTHDR)");
 843 #endif
 844         }
 845
 846 /*
 847         optval = 1;
 848         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 849                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 850                     &optval, sizeof(optval)) == -1)
 851                         err(1, "IPV6_MULTICAST_LOOP");
 852 */
 853
 854         /* Specify the outgoing interface and/or the source address */
 855         if (usepktinfo)
 856                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 857
 858         if (hoplimit != -1)
 859                 ip6optlen += CMSG_SPACE(sizeof(int));
 860
 861         /* set IP6 packet options */
 862         if (ip6optlen) {
 863                 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
 864                         errx(1, "can't allocate enough memory");
 865                 smsghdr.msg_control = (caddr_t)scmsg;
 866                 smsghdr.msg_controllen = ip6optlen;
 867                 scmsgp = (struct cmsghdr *)scmsg;
 868         }
 869         if (usepktinfo) {
 870                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 871                 memset(pktinfo, 0, sizeof(*pktinfo));
 872                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 873                 scmsgp->cmsg_level = IPPROTO_IPV6;
 874                 scmsgp->cmsg_type = IPV6_PKTINFO;
 875                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 876         }
 877
 878         /* set the outgoing interface */
 879         if (ifname) {
 880 #ifndef USE_SIN6_SCOPE_ID
 881                 /* pktinfo must have already been allocated */
 882                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 883                         errx(1, "%s: invalid interface name", ifname);
 884 #else
 885                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 886                         errx(1, "%s: invalid interface name", ifname);
 887 #endif
 888         }
 889         if (hoplimit != -1) {
 890                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 891                 scmsgp->cmsg_level = IPPROTO_IPV6;
 892                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 893                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 894
 895                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 896         }
 897
 898         if (argc > 1) { /* some intermediate addrs are specified */
 899                 int hops, error;
 900 #ifdef USE_RFC2292BIS
 901                 int rthdrlen;
 902 #endif
 903
 904 #ifdef USE_RFC2292BIS
 905                 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
 906                 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
 907                 scmsgp->cmsg_level = IPPROTO_IPV6;
 908                 scmsgp->cmsg_type = IPV6_RTHDR;
 909                 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
 910                 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
 911                     IPV6_RTHDR_TYPE_0, argc - 1);
 912                 if (rthdr == NULL)
 913                         errx(1, "can't initialize rthdr");
 914 #else  /* old advanced API */
 915                 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
 916                     IPV6_RTHDR_TYPE_0)) == 0)
 917                         errx(1, "can't initialize rthdr");
 918 #endif /* USE_RFC2292BIS */
 919
 920                 for (hops = 0; hops < argc - 1; hops++) {
 921                         struct addrinfo *iaip;
 922
 923                         if ((error = getaddrinfo(argv[hops], NULL, &hints,
 924                             &iaip)))
 925                                 errx(1, "%s", gai_strerror(error));
 926                         if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6)
 927                                 errx(1,
 928                                     "bad addr family of an intermediate addr");
 929
 930 #ifdef USE_RFC2292BIS
 931                         if (inet6_rth_add(rthdr,
 932                             &(SIN6(iaip->ai_addr))->sin6_addr))
 933                                 errx(1, "can't add an intermediate node");
 934 #else  /* old advanced API */
 935                         if (inet6_rthdr_add(scmsgp,
 936                             &(SIN6(iaip->ai_addr))->sin6_addr,
 937                             IPV6_RTHDR_LOOSE))
 938                                 errx(1, "can't add an intermediate node");
 939 #endif /* USE_RFC2292BIS */
 940                         freeaddrinfo(iaip);
 941                 }
 942
 943 #ifndef USE_RFC2292BIS
 944                 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
 945                         errx(1, "can't set the last flag");
 946 #endif
 947
 948                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 949         }
 950
 951         if (!(options & F_SRCADDR)) {
 952                 /*
 953                  * get the source address. XXX since we revoked the root
 954                  * privilege, we cannot use a raw socket for this.
 955                  */
 956                 int dummy;
 957                 socklen_t len = sizeof(src);
 958
 959                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 960                         err(1, "UDP socket");
 961
 962                 src.sin6_family = AF_INET6;
 963                 src.sin6_addr = dst.sin6_addr;
 964                 src.sin6_port = ntohs(DUMMY_PORT);
 965                 src.sin6_scope_id = dst.sin6_scope_id;
 966
 967 #ifdef USE_RFC2292BIS
 968                 if (pktinfo &&
 969                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 970                     (void *)pktinfo, sizeof(*pktinfo)))
 971                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 972
 973                 if (hoplimit != -1 &&
 974                     setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 975                     (void *)&hoplimit, sizeof(hoplimit)))
 976                         err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
 977
 978                 if (hoplimit != -1 &&
 979                     setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 980                     (void *)&hoplimit, sizeof(hoplimit)))
 981                         err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
 982
 983                 if (rthdr &&
 984                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
 985                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
 986                         err(1, "UDP setsockopt(IPV6_RTHDR)");
 987 #else  /* old advanced API */
 988                 if (smsghdr.msg_control &&
 989                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
 990                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
 991                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
 992 #endif
 993
 994                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
 995                         err(1, "UDP connect");
 996
 997                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
 998                         err(1, "getsockname");
 999
1000                 close(dummy);
1001         }
1002
1003 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
1004         if (sockbufsize) {
1005                 if (datalen > sockbufsize)
1006                         warnx("you need -b to increase socket buffer size");
1007                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
1008                     sizeof(sockbufsize)) < 0)
1009                         err(1, "setsockopt(SO_SNDBUF)");
1010                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
1011                     sizeof(sockbufsize)) < 0)
1012                         err(1, "setsockopt(SO_RCVBUF)");
1013         }
1014         else {
1015                 if (datalen > 8 * 1024) /*XXX*/
1016                         warnx("you need -b to increase socket buffer size");
1017                 /*
1018                  * When pinging the broadcast address, you can get a lot of
1019                  * answers. Doing something so evil is useful if you are trying
1020                  * to stress the ethernet, or just want to fill the arp cache
1021                  * to get some stuff for /etc/ethers.
1022                  */
1023                 hold = 48 * 1024;
1024                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
1025                     sizeof(hold));
1026         }
1027 #endif
1028
1029         optval = 1;
1030 #ifndef USE_SIN6_SCOPE_ID
1031 #ifdef IPV6_RECVPKTINFO
1032         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
1033             sizeof(optval)) < 0)
1034                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
1035 #else  /* old adv. API */
1036         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
1037             sizeof(optval)) < 0)
1038                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
1039 #endif
1040 #endif /* USE_SIN6_SCOPE_ID */
1041 #ifdef IPV6_RECVHOPLIMIT
1042         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
1043             sizeof(optval)) < 0)
1044                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
1045 #else  /* old adv. API */
1046         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
1047             sizeof(optval)) < 0)
1048                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
1049 #endif
1050
1051         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
1052             (unsigned long)(pingerlen() - 8));
1053         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
1054         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
1055
1056         while (preload--)               /* Fire off them quickies. */
1057                 (void)pinger();
1058
1059         (void)signal(SIGINT, onsignal);
1060 #ifdef SIGINFO
1061         (void)signal(SIGINFO, onsignal);
1062 #endif
1063
1064         if ((options & F_FLOOD) == 0) {
1065                 (void)signal(SIGALRM, onsignal);
1066                 itimer.it_interval = interval;
1067                 itimer.it_value = interval;
1068                 (void)setitimer(ITIMER_REAL, &itimer, NULL);
1069                 if (ntransmitted == 0)
1070                         retransmit();
1071         }
1072
1073 #ifndef HAVE_POLL_H
1074         fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
1075         if ((fdmaskp = malloc(fdmasks)) == NULL)
1076                 err(1, "malloc");
1077 #endif
1078
1079         seenalrm = seenint = 0;
1080 #ifdef SIGINFO
1081         seeninfo = 0;
1082 #endif
1083
1084         /* For control (ancillary) data received from recvmsg() */
1085         cm = (struct cmsghdr *)malloc(CONTROLLEN);
1086         if (cm == NULL)
1087                 err(1, "malloc");
1088
1089         for (;;) {
1090                 struct msghdr m;
1091                 struct iovec iov[2];
1092
1093                 /* signal handling */
1094                 if (seenalrm) {
1095                         /* last packet sent, timeout reached? */
1096                         if (npackets && ntransmitted >= npackets) {
1097                                 struct timeval zerotime = {0, 0};
1098                                 itimer.it_value = zerotime;
1099                                 itimer.it_interval = zerotime;
1100                                 (void)setitimer(ITIMER_REAL, &itimer, NULL);
1101                                 seenalrm = 0;   /* clear flag */
1102                                 continue;
1103                         }
1104                         retransmit();
1105                         seenalrm = 0;
1106                         continue;
1107                 }
1108                 if (seenint) {
1109                         onint(SIGINT);
1110                         seenint = 0;
1111                         continue;
1112                 }
1113 #ifdef SIGINFO
1114                 if (seeninfo) {
1115                         summary();
1116                         seeninfo = 0;
1117                         continue;
1118                 }
1119 #endif
1120
1121                 if (options & F_FLOOD) {
1122                         (void)pinger();
1123 #ifdef HAVE_POLL_H
1124                         timeout = 10;
1125 #else
1126                         timeout.tv_sec = 0;
1127                         timeout.tv_usec = 10000;
1128                         tv = &timeout;
1129 #endif
1130                 } else {
1131 #ifdef HAVE_POLL_H
1132                         timeout = INFTIM;
1133 #else
1134                         tv = NULL;
1135 #endif
1136                 }
1137 #ifdef HAVE_POLL_H
1138                 fdmaskp[0].fd = s;
1139                 fdmaskp[0].events = POLLIN;
1140                 cc = poll(fdmaskp, 1, timeout);
1141 #else
1142                 memset(fdmaskp, 0, fdmasks);
1143                 FD_SET(s, fdmaskp);
1144                 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1145 #endif
1146                 if (cc < 0) {
1147                         if (errno != EINTR) {
1148 #ifdef HAVE_POLL_H
1149                                 warn("poll");
1150 #else
1151                                 warn("select");
1152 #endif
1153                                 sleep(1);
1154                         }
1155                         continue;
1156                 } else if (cc == 0)
1157                         continue;
1158
1159                 m.msg_name = (caddr_t)&from;
1160                 m.msg_namelen = sizeof(from);
1161                 memset(&iov, 0, sizeof(iov));
1162                 iov[0].iov_base = (caddr_t)packet;
1163                 iov[0].iov_len = packlen;
1164                 m.msg_iov = iov;
1165                 m.msg_iovlen = 1;
1166                 memset(cm, 0, CONTROLLEN);
1167                 m.msg_control = (void *)cm;
1168                 m.msg_controllen = CONTROLLEN;
1169
1170                 cc = recvmsg(s, &m, 0);
1171                 if (cc < 0) {
1172                         if (errno != EINTR) {
1173                                 warn("recvmsg");
1174                                 sleep(1);
1175                         }
1176                         continue;
1177                 } else if (cc == 0) {
1178                         int mtu;
1179
1180                         /*
1181                          * receive control messages only. Process the
1182                          * exceptions (currently the only possiblity is
1183                          * a path MTU notification.)
1184                          */
1185                         if ((mtu = get_pathmtu(&m)) > 0) {
1186                                 if ((options & F_VERBOSE) != 0) {
1187                                         printf("new path MTU (%d) is "
1188                                             "notified\n", mtu);
1189                                 }
1190                         }
1191                         continue;
1192                 } else {
1193                         /*
1194                          * an ICMPv6 message (probably an echoreply) arrived.
1195                          */
1196                         pr_pack(packet, cc, &m);
1197                 }
1198                 if (((options & F_ONCE) != 0 && nreceived > 0) ||
1199                     (npackets > 0 && nreceived >= npackets))
1200                         break;
1201                 if (ntransmitted - nreceived - 1 > nmissedmax) {
1202                         nmissedmax = ntransmitted - nreceived - 1;
1203                         if (options & F_MISSED)
1204                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1205                 }
1206         }
1207         summary();
1208         exit(nreceived == 0 ? 2 : 0);
1209 }
1210
1211 void
1212 onsignal(sig)
1213         int sig;
1214 {
1215
1216         switch (sig) {
1217         case SIGALRM:
1218                 seenalrm++;
1219                 break;
1220         case SIGINT:
1221                 seenint++;
1222                 break;
1223 #ifdef SIGINFO
1224         case SIGINFO:
1225                 seeninfo++;
1226                 break;
1227 #endif
1228         }
1229 }
1230
1231 /*
1232  * retransmit --
1233  *      This routine transmits another ping6.
1234  */
1235 void
1236 retransmit()
1237 {
1238         struct itimerval itimer;
1239
1240         if (pinger() == 0)
1241                 return;
1242
1243         /*
1244          * If we're not transmitting any more packets, change the timer
1245          * to wait two round-trip times if we've received any packets or
1246          * ten seconds if we haven't.
1247          */
1248 #define MAXWAIT         10
1249         if (nreceived) {
1250                 itimer.it_value.tv_sec =  2 * tmax / 1000;
1251                 if (itimer.it_value.tv_sec == 0)
1252                         itimer.it_value.tv_sec = 1;
1253         } else
1254                 itimer.it_value.tv_sec = MAXWAIT;
1255         itimer.it_interval.tv_sec = 0;
1256         itimer.it_interval.tv_usec = 0;
1257         itimer.it_value.tv_usec = 0;
1258
1259         (void)signal(SIGALRM, onsignal);
1260         (void)setitimer(ITIMER_REAL, &itimer, NULL);
1261 }
1262
1263 /*
1264  * pinger --
1265  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1266  * will be added on by the kernel.  The ID field is our UNIX process ID,
1267  * and the sequence number is an ascending integer.  The first 8 bytes
1268  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1269  * byte-order, to compute the round-trip time.
1270  */
1271 size_t
1272 pingerlen()
1273 {
1274         size_t l;
1275
1276         if (options & F_FQDN)
1277                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1278         else if (options & F_FQDNOLD)
1279                 l = ICMP6_NIQLEN;
1280         else if (options & F_NODEADDR)
1281                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1282         else if (options & F_SUPTYPES)
1283                 l = ICMP6_NIQLEN;
1284         else
1285                 l = ICMP6ECHOLEN + datalen;
1286
1287         return l;
1288 }
1289
1290 int
1291 pinger()
1292 {
1293         struct icmp6_hdr *icp;
1294         struct iovec iov[2];
1295         int i, cc;
1296         struct icmp6_nodeinfo *nip;
1297         int seq;
1298
1299         if (npackets && ntransmitted >= npackets)
1300                 return(-1);     /* no more transmission */
1301
1302         icp = (struct icmp6_hdr *)outpack;
1303         nip = (struct icmp6_nodeinfo *)outpack;
1304         memset(icp, 0, sizeof(*icp));
1305         icp->icmp6_cksum = 0;
1306         seq = ntransmitted++;
1307         CLR(seq % mx_dup_ck);
1308
1309         if (options & F_FQDN) {
1310                 icp->icmp6_type = ICMP6_NI_QUERY;
1311                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1312                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1313                 nip->ni_flags = htons(0);
1314
1315                 memcpy(nip->icmp6_ni_nonce, nonce,
1316                     sizeof(nip->icmp6_ni_nonce));
1317                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1318
1319                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1320                     sizeof(dst.sin6_addr));
1321                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1322                 datalen = 0;
1323         } else if (options & F_FQDNOLD) {
1324                 /* packet format in 03 draft - no Subject data on queries */
1325                 icp->icmp6_type = ICMP6_NI_QUERY;
1326                 icp->icmp6_code = 0;    /* code field is always 0 */
1327                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1328                 nip->ni_flags = htons(0);
1329
1330                 memcpy(nip->icmp6_ni_nonce, nonce,
1331                     sizeof(nip->icmp6_ni_nonce));
1332                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1333
1334                 cc = ICMP6_NIQLEN;
1335                 datalen = 0;
1336         } else if (options & F_NODEADDR) {
1337                 icp->icmp6_type = ICMP6_NI_QUERY;
1338                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1339                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1340                 nip->ni_flags = naflags;
1341
1342                 memcpy(nip->icmp6_ni_nonce, nonce,
1343                     sizeof(nip->icmp6_ni_nonce));
1344                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1345
1346                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1347                     sizeof(dst.sin6_addr));
1348                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1349                 datalen = 0;
1350         } else if (options & F_SUPTYPES) {
1351                 icp->icmp6_type = ICMP6_NI_QUERY;
1352                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1353                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1354                 /* we support compressed bitmap */
1355                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1356
1357                 memcpy(nip->icmp6_ni_nonce, nonce,
1358                     sizeof(nip->icmp6_ni_nonce));
1359                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1360                 cc = ICMP6_NIQLEN;
1361                 datalen = 0;
1362         } else {
1363                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1364                 icp->icmp6_code = 0;
1365                 icp->icmp6_id = htons(ident);
1366                 icp->icmp6_seq = ntohs(seq);
1367                 if (timing) {
1368                         struct timeval tv;
1369                         struct tv32 *tv32;
1370                         (void)gettimeofday(&tv, NULL);
1371                         tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1372                         tv32->tv32_sec = htonl(tv.tv_sec);
1373                         tv32->tv32_usec = htonl(tv.tv_usec);
1374                 }
1375                 cc = ICMP6ECHOLEN + datalen;
1376         }
1377
1378 #ifdef DIAGNOSTIC
1379         if (pingerlen() != cc)
1380                 errx(1, "internal error; length mismatch");
1381 #endif
1382
1383         smsghdr.msg_name = (caddr_t)&dst;
1384         smsghdr.msg_namelen = sizeof(dst);
1385         memset(&iov, 0, sizeof(iov));
1386         iov[0].iov_base = (caddr_t)outpack;
1387         iov[0].iov_len = cc;
1388         smsghdr.msg_iov = iov;
1389         smsghdr.msg_iovlen = 1;
1390
1391         i = sendmsg(s, &smsghdr, 0);
1392
1393         if (i < 0 || i != cc)  {
1394                 if (i < 0)
1395                         warn("sendmsg");
1396                 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1397                     hostname, cc, i);
1398         }
1399         if (!(options & F_QUIET) && options & F_FLOOD)
1400                 (void)write(STDOUT_FILENO, &DOT, 1);
1401
1402         return(0);
1403 }
1404
1405 int
1406 myechoreply(icp)
1407         const struct icmp6_hdr *icp;
1408 {
1409         if (ntohs(icp->icmp6_id) == ident)
1410                 return 1;
1411         else
1412                 return 0;
1413 }
1414
1415 int
1416 mynireply(nip)
1417         const struct icmp6_nodeinfo *nip;
1418 {
1419         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1420             nonce + sizeof(u_int16_t),
1421             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1422                 return 1;
1423         else
1424                 return 0;
1425 }
1426
1427 char *
1428 dnsdecode(sp, ep, base, buf, bufsiz)
1429         const u_char **sp;
1430         const u_char *ep;
1431         const u_char *base;     /*base for compressed name*/
1432         char *buf;
1433         size_t bufsiz;
1434 {
1435         int i;
1436         const u_char *cp;
1437         char cresult[MAXDNAME + 1];
1438         const u_char *comp;
1439         int l;
1440
1441         cp = *sp;
1442         *buf = '\0';
1443
1444         if (cp >= ep)
1445                 return NULL;
1446         while (cp < ep) {
1447                 i = *cp;
1448                 if (i == 0 || cp != *sp) {
1449                         if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1450                                 return NULL;    /*result overrun*/
1451                 }
1452                 if (i == 0)
1453                         break;
1454                 cp++;
1455
1456                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1457                         /* DNS compression */
1458                         if (!base)
1459                                 return NULL;
1460
1461                         comp = base + (i & 0x3f);
1462                         if (dnsdecode(&comp, cp, base, cresult,
1463                             sizeof(cresult)) == NULL)
1464                                 return NULL;
1465                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1466                                 return NULL;    /*result overrun*/
1467                         break;
1468                 } else if ((i & 0x3f) == i) {
1469                         if (i > ep - cp)
1470                                 return NULL;    /*source overrun*/
1471                         while (i-- > 0 && cp < ep) {
1472                                 l = snprintf(cresult, sizeof(cresult),
1473                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1474                                 if (l >= sizeof(cresult) || l < 0)
1475                                         return NULL;
1476                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1477                                         return NULL;    /*result overrun*/
1478                                 cp++;
1479                         }
1480                 } else
1481                         return NULL;    /*invalid label*/
1482         }
1483         if (i != 0)
1484                 return NULL;    /*not terminated*/
1485         cp++;
1486         *sp = cp;
1487         return buf;
1488 }
1489
1490 /*
1491  * pr_pack --
1492  *      Print out the packet, if it came from us.  This logic is necessary
1493  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1494  * which arrive ('tis only fair).  This permits multiple copies of this
1495  * program to be run without having intermingled output (or statistics!).
1496  */
1497 void
1498 pr_pack(buf, cc, mhdr)
1499         u_char *buf;
1500         int cc;
1501         struct msghdr *mhdr;
1502 {
1503 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1504         struct icmp6_hdr *icp;
1505         struct icmp6_nodeinfo *ni;
1506         int i;
1507         int hoplim;
1508         struct sockaddr *from;
1509         int fromlen;
1510         u_char *cp = NULL, *dp, *end = buf + cc;
1511         struct in6_pktinfo *pktinfo = NULL;
1512         struct timeval tv, tp;
1513         struct tv32 *tpp;
1514         double triptime = 0;
1515         int dupflag;
1516         size_t off;
1517         int oldfqdn;
1518         u_int16_t seq;
1519         char dnsname[MAXDNAME + 1];
1520
1521         (void)gettimeofday(&tv, NULL);
1522
1523         if (!mhdr || !mhdr->msg_name ||
1524             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1525             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1526                 if (options & F_VERBOSE)
1527                         warnx("invalid peername");
1528                 return;
1529         }
1530         from = (struct sockaddr *)mhdr->msg_name;
1531         fromlen = mhdr->msg_namelen;
1532         if (cc < sizeof(struct icmp6_hdr)) {
1533                 if (options & F_VERBOSE)
1534                         warnx("packet too short (%d bytes) from %s", cc,
1535                             pr_addr(from, fromlen));
1536                 return;
1537         }
1538         if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1539             (options & F_VERBOSE) != 0)
1540                 warnx("some control data discarded, insufficient buffer size");
1541         icp = (struct icmp6_hdr *)buf;
1542         ni = (struct icmp6_nodeinfo *)buf;
1543         off = 0;
1544
1545         if ((hoplim = get_hoplim(mhdr)) == -1) {
1546                 warnx("failed to get receiving hop limit");
1547                 return;
1548         }
1549         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1550                 warnx("failed to get receiving packet information");
1551                 return;
1552         }
1553
1554         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1555                 seq = ntohs(icp->icmp6_seq);
1556                 ++nreceived;
1557                 if (timing) {
1558                         tpp = (struct tv32 *)(icp + 1);
1559                         tp.tv_sec = ntohl(tpp->tv32_sec);
1560                         tp.tv_usec = ntohl(tpp->tv32_usec);
1561                         tvsub(&tv, &tp);
1562                         triptime = ((double)tv.tv_sec) * 1000.0 +
1563                             ((double)tv.tv_usec) / 1000.0;
1564                         tsum += triptime;
1565                         tsumsq += triptime * triptime;
1566                         if (triptime < tmin)
1567                                 tmin = triptime;
1568                         if (triptime > tmax)
1569                                 tmax = triptime;
1570                 }
1571
1572                 if (TST(seq % mx_dup_ck)) {
1573                         ++nrepeats;
1574                         --nreceived;
1575                         dupflag = 1;
1576                 } else {
1577                         SET(seq % mx_dup_ck);
1578                         dupflag = 0;
1579                 }
1580
1581                 if (options & F_QUIET)
1582                         return;
1583
1584                 if (options & F_FLOOD)
1585                         (void)write(STDOUT_FILENO, &BSPACE, 1);
1586                 else {
1587                         if (options & F_AUDIBLE)
1588                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1589                         (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1590                             pr_addr(from, fromlen), seq);
1591                         (void)printf(" hlim=%d", hoplim);
1592                         if ((options & F_VERBOSE) != 0) {
1593                                 struct sockaddr_in6 dstsa;
1594
1595                                 memset(&dstsa, 0, sizeof(dstsa));
1596                                 dstsa.sin6_family = AF_INET6;
1597                                 dstsa.sin6_len = sizeof(dstsa);
1598                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1599                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1600                                 (void)printf(" dst=%s",
1601                                     pr_addr((struct sockaddr *)&dstsa,
1602                                     sizeof(dstsa)));
1603                         }
1604                         if (timing)
1605                                 (void)printf(" time=%.3f ms", triptime);
1606                         if (dupflag)
1607                                 (void)printf("(DUP!)");
1608                         /* check the data */
1609                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1610                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1611                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1612                                 if (*cp != *dp) {
1613                                         (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1614                                         break;
1615                                 }
1616                         }
1617                 }
1618         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1619                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1620                 ++nreceived;
1621                 if (TST(seq % mx_dup_ck)) {
1622                         ++nrepeats;
1623                         --nreceived;
1624                         dupflag = 1;
1625                 } else {
1626                         SET(seq % mx_dup_ck);
1627                         dupflag = 0;
1628                 }
1629
1630                 if (options & F_QUIET)
1631                         return;
1632
1633                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1634
1635                 switch (ntohs(ni->ni_code)) {
1636                 case ICMP6_NI_SUCCESS:
1637                         break;
1638                 case ICMP6_NI_REFUSED:
1639                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1640                         goto fqdnend;
1641                 case ICMP6_NI_UNKNOWN:
1642                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1643                         goto fqdnend;
1644                 default:
1645                         printf("unknown code 0x%x, type 0x%x",
1646                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1647                         goto fqdnend;
1648                 }
1649
1650                 switch (ntohs(ni->ni_qtype)) {
1651                 case NI_QTYPE_NOOP:
1652                         printf("NodeInfo NOOP");
1653                         break;
1654                 case NI_QTYPE_SUPTYPES:
1655                         pr_suptypes(ni, end - (u_char *)ni);
1656                         break;
1657                 case NI_QTYPE_NODEADDR:
1658                         pr_nodeaddr(ni, end - (u_char *)ni);
1659                         break;
1660                 case NI_QTYPE_FQDN:
1661                 default:        /* XXX: for backward compatibility */
1662                         cp = (u_char *)ni + ICMP6_NIRLEN;
1663                         if (buf[off + ICMP6_NIRLEN] ==
1664                             cc - off - ICMP6_NIRLEN - 1)
1665                                 oldfqdn = 1;
1666                         else
1667                                 oldfqdn = 0;
1668                         if (oldfqdn) {
1669                                 cp++;   /* skip length */
1670                                 while (cp < end) {
1671                                         safeputc(*cp & 0xff);
1672                                         cp++;
1673                                 }
1674                         } else {
1675                                 i = 0;
1676                                 while (cp < end) {
1677                                         if (dnsdecode((const u_char **)&cp, end,
1678                                             (const u_char *)(ni + 1), dnsname,
1679                                             sizeof(dnsname)) == NULL) {
1680                                                 printf("???");
1681                                                 break;
1682                                         }
1683                                         /*
1684                                          * name-lookup special handling for
1685                                          * truncated name
1686                                          */
1687                                         if (cp + 1 <= end && !*cp &&
1688                                             strlen(dnsname) > 0) {
1689                                                 dnsname[strlen(dnsname) - 1] = '\0';
1690                                                 cp++;
1691                                         }
1692                                         printf("%s%s", i > 0 ? "," : "",
1693                                             dnsname);
1694                                 }
1695                         }
1696                         if (options & F_VERBOSE) {
1697                                 int32_t ttl;
1698                                 int comma = 0;
1699
1700                                 (void)printf(" (");     /*)*/
1701
1702                                 switch (ni->ni_code) {
1703                                 case ICMP6_NI_REFUSED:
1704                                         (void)printf("refused");
1705                                         comma++;
1706                                         break;
1707                                 case ICMP6_NI_UNKNOWN:
1708                                         (void)printf("unknown qtype");
1709                                         comma++;
1710                                         break;
1711                                 }
1712
1713                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1714                                         /* case of refusion, unknown */
1715                                         /*(*/
1716                                         putchar(')');
1717                                         goto fqdnend;
1718                                 }
1719                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1720                                 if (comma)
1721                                         printf(",");
1722                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1723                                         (void)printf("TTL=%d:meaningless",
1724                                             (int)ttl);
1725                                 } else {
1726                                         if (ttl < 0) {
1727                                                 (void)printf("TTL=%d:invalid",
1728                                                    ttl);
1729                                         } else
1730                                                 (void)printf("TTL=%d", ttl);
1731                                 }
1732                                 comma++;
1733
1734                                 if (oldfqdn) {
1735                                         if (comma)
1736                                                 printf(",");
1737                                         printf("03 draft");
1738                                         comma++;
1739                                 } else {
1740                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1741                                         if (cp == end) {
1742                                                 if (comma)
1743                                                         printf(",");
1744                                                 printf("no name");
1745                                                 comma++;
1746                                         }
1747                                 }
1748
1749                                 if (buf[off + ICMP6_NIRLEN] !=
1750                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1751                                         if (comma)
1752                                                 printf(",");
1753                                         (void)printf("invalid namelen:%d/%lu",
1754                                             buf[off + ICMP6_NIRLEN],
1755                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1756                                         comma++;
1757                                 }
1758                                 /*(*/
1759                                 putchar(')');
1760                         }
1761                 fqdnend:
1762                         ;
1763                 }
1764         } else {
1765                 /* We've got something other than an ECHOREPLY */
1766                 if (!(options & F_VERBOSE))
1767                         return;
1768                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1769                 pr_icmph(icp, end);
1770         }
1771
1772         if (!(options & F_FLOOD)) {
1773                 (void)putchar('\n');
1774                 if (options & F_VERBOSE)
1775                         pr_exthdrs(mhdr);
1776                 (void)fflush(stdout);
1777         }
1778 #undef safeputc
1779 }
1780
1781 void
1782 pr_exthdrs(mhdr)
1783         struct msghdr *mhdr;
1784 {
1785         ssize_t bufsize;
1786         void    *bufp;
1787         struct cmsghdr *cm;
1788
1789         bufsize = 0;
1790         bufp = mhdr->msg_control;
1791         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1792              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1793                 if (cm->cmsg_level != IPPROTO_IPV6)
1794                         continue;
1795
1796                 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1797                 if (bufsize <= 0)
1798                         continue;
1799                 switch (cm->cmsg_type) {
1800                 case IPV6_HOPOPTS:
1801                         printf("  HbH Options: ");
1802                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1803                         break;
1804                 case IPV6_DSTOPTS:
1805 #ifdef IPV6_RTHDRDSTOPTS
1806                 case IPV6_RTHDRDSTOPTS:
1807 #endif
1808                         printf("  Dst Options: ");
1809                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1810                         break;
1811                 case IPV6_RTHDR:
1812                         printf("  Routing: ");
1813                         pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1814                         break;
1815                 }
1816         }
1817 }
1818
1819 #ifdef USE_RFC2292BIS
1820 void
1821 pr_ip6opt(void *extbuf, size_t bufsize)
1822 {
1823         struct ip6_hbh *ext;
1824         int currentlen;
1825         u_int8_t type;
1826         socklen_t extlen, len, origextlen;
1827         void *databuf;
1828         size_t offset;
1829         u_int16_t value2;
1830         u_int32_t value4;
1831
1832         ext = (struct ip6_hbh *)extbuf;
1833         extlen = (ext->ip6h_len + 1) * 8;
1834         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1835             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1836
1837         /*
1838          * Bounds checking on the ancillary data buffer:
1839          *     subtract the size of a cmsg structure from the buffer size.
1840          */
1841         if (bufsize < (extlen  + CMSG_SPACE(0))) {
1842                 origextlen = extlen;
1843                 extlen = bufsize - CMSG_SPACE(0);
1844                 warnx("options truncated, showing only %u (total=%u)",
1845                     (unsigned int)(extlen / 8 - 1),
1846                     (unsigned int)(ext->ip6h_len));
1847         }
1848
1849         currentlen = 0;
1850         while (1) {
1851                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1852                     &type, &len, &databuf);
1853                 if (currentlen == -1)
1854                         break;
1855                 switch (type) {
1856                 /*
1857                  * Note that inet6_opt_next automatically skips any padding
1858                  * optins.
1859                  */
1860                 case IP6OPT_JUMBO:
1861                         offset = 0;
1862                         offset = inet6_opt_get_val(databuf, offset,
1863                             &value4, sizeof(value4));
1864                         printf("    Jumbo Payload Opt: Length %u\n",
1865                             (u_int32_t)ntohl(value4));
1866                         break;
1867                 case IP6OPT_ROUTER_ALERT:
1868                         offset = 0;
1869                         offset = inet6_opt_get_val(databuf, offset,
1870                                                    &value2, sizeof(value2));
1871                         printf("    Router Alert Opt: Type %u\n",
1872                             ntohs(value2));
1873                         break;
1874                 default:
1875                         printf("    Received Opt %u len %lu\n",
1876                             type, (unsigned long)len);
1877                         break;
1878                 }
1879         }
1880         return;
1881 }
1882 #else  /* !USE_RFC2292BIS */
1883 /* ARGSUSED */
1884 void
1885 pr_ip6opt(void *extbuf, size_t bufsize __unused)
1886 {
1887         putchar('\n');
1888         return;
1889 }
1890 #endif /* USE_RFC2292BIS */
1891
1892 #ifdef USE_RFC2292BIS
1893 void
1894 pr_rthdr(void *extbuf, size_t bufsize)
1895 {
1896         struct in6_addr *in6;
1897         char ntopbuf[INET6_ADDRSTRLEN];
1898         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1899         int i, segments, origsegs, rthsize, size0, size1;
1900
1901         /* print fixed part of the header */
1902         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1903             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1904         if ((segments = inet6_rth_segments(extbuf)) >= 0) {
1905                 printf("%d segments, ", segments);
1906                 printf("%d left\n", rh->ip6r_segleft);
1907         } else {
1908                 printf("segments unknown, ");
1909                 printf("%d left\n", rh->ip6r_segleft);
1910                 return;
1911         }
1912
1913         /*
1914          * Bounds checking on the ancillary data buffer. When calculating
1915          * the number of items to show keep in mind:
1916          *      - The size of the cmsg structure
1917          *      - The size of one segment (the size of a Type 0 routing header)
1918          *      - When dividing add a fudge factor of one in case the
1919          *        dividend is not evenly divisible by the divisor
1920          */
1921         rthsize = (rh->ip6r_len + 1) * 8;
1922         if (bufsize < (rthsize + CMSG_SPACE(0))) {
1923                 origsegs = segments;
1924                 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
1925                 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
1926                 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
1927                     (size1 - size0) + 1;
1928                 warnx("segments truncated, showing only %d (total=%d)",
1929                     segments, origsegs);
1930         }
1931
1932         for (i = 0; i < segments; i++) {
1933                 in6 = inet6_rth_getaddr(extbuf, i);
1934                 if (in6 == NULL)
1935                         printf("   [%d]<NULL>\n", i);
1936                 else {
1937                         if (!inet_ntop(AF_INET6, in6, ntopbuf,
1938                             sizeof(ntopbuf)))
1939                                 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1940                         printf("   [%d]%s\n", i, ntopbuf);
1941                 }
1942         }
1943
1944         return;
1945
1946 }
1947
1948 #else  /* !USE_RFC2292BIS */
1949 /* ARGSUSED */
1950 void
1951 pr_rthdr(void *extbuf, size_t bufsize __unused)
1952 {
1953         putchar('\n');
1954         return;
1955 }
1956 #endif /* USE_RFC2292BIS */
1957
1958 int
1959 pr_bitrange(v, soff, ii)
1960         u_int32_t v;
1961         int soff;
1962         int ii;
1963 {
1964         int off;
1965         int i;
1966
1967         off = 0;
1968         while (off < 32) {
1969                 /* shift till we have 0x01 */
1970                 if ((v & 0x01) == 0) {
1971                         if (ii > 1)
1972                                 printf("-%u", soff + off - 1);
1973                         ii = 0;
1974                         switch (v & 0x0f) {
1975                         case 0x00:
1976                                 v >>= 4;
1977                                 off += 4;
1978                                 continue;
1979                         case 0x08:
1980                                 v >>= 3;
1981                                 off += 3;
1982                                 continue;
1983                         case 0x04: case 0x0c:
1984                                 v >>= 2;
1985                                 off += 2;
1986                                 continue;
1987                         default:
1988                                 v >>= 1;
1989                                 off += 1;
1990                                 continue;
1991                         }
1992                 }
1993
1994                 /* we have 0x01 with us */
1995                 for (i = 0; i < 32 - off; i++) {
1996                         if ((v & (0x01 << i)) == 0)
1997                                 break;
1998                 }
1999                 if (!ii)
2000                         printf(" %u", soff + off);
2001                 ii += i;
2002                 v >>= i; off += i;
2003         }
2004         return ii;
2005 }
2006
2007 void
2008 pr_suptypes(ni, nilen)
2009         struct icmp6_nodeinfo *ni; /* ni->qtype must be SUPTYPES */
2010         size_t nilen;
2011 {
2012         size_t clen;
2013         u_int32_t v;
2014         const u_char *cp, *end;
2015         u_int16_t cur;
2016         struct cbit {
2017                 u_int16_t words;        /*32bit count*/
2018                 u_int16_t skip;
2019         } cbit;
2020 #define MAXQTYPES       (1 << 16)
2021         size_t off;
2022         int b;
2023
2024         cp = (u_char *)(ni + 1);
2025         end = ((u_char *)ni) + nilen;
2026         cur = 0;
2027         b = 0;
2028
2029         printf("NodeInfo Supported Qtypes");
2030         if (options & F_VERBOSE) {
2031                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
2032                         printf(", compressed bitmap");
2033                 else
2034                         printf(", raw bitmap");
2035         }
2036
2037         while (cp < end) {
2038                 clen = (size_t)(end - cp);
2039                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
2040                         if (clen == 0 || clen > MAXQTYPES / 8 ||
2041                             clen % sizeof(v)) {
2042                                 printf("???");
2043                                 return;
2044                         }
2045                 } else {
2046                         if (clen < sizeof(cbit) || clen % sizeof(v))
2047                                 return;
2048                         memcpy(&cbit, cp, sizeof(cbit));
2049                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2050                             clen)
2051                                 return;
2052                         cp += sizeof(cbit);
2053                         clen = ntohs(cbit.words) * sizeof(v);
2054                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
2055                             MAXQTYPES)
2056                                 return;
2057                 }
2058
2059                 for (off = 0; off < clen; off += sizeof(v)) {
2060                         memcpy(&v, cp + off, sizeof(v));
2061                         v = (u_int32_t)ntohl(v);
2062                         b = pr_bitrange(v, (int)(cur + off * 8), b);
2063                 }
2064                 /* flush the remaining bits */
2065                 b = pr_bitrange(0, (int)(cur + off * 8), b);
2066
2067                 cp += clen;
2068                 cur += clen * 8;
2069                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2070                         cur += ntohs(cbit.skip) * 32;
2071         }
2072 }
2073
2074 void
2075 pr_nodeaddr(ni, nilen)
2076         struct icmp6_nodeinfo *ni; /* ni->qtype must be NODEADDR */
2077         int nilen;
2078 {
2079         u_char *cp = (u_char *)(ni + 1);
2080         char ntop_buf[INET6_ADDRSTRLEN];
2081         int withttl = 0;
2082
2083         nilen -= sizeof(struct icmp6_nodeinfo);
2084
2085         if (options & F_VERBOSE) {
2086                 switch (ni->ni_code) {
2087                 case ICMP6_NI_REFUSED:
2088                         (void)printf("refused");
2089                         break;
2090                 case ICMP6_NI_UNKNOWN:
2091                         (void)printf("unknown qtype");
2092                         break;
2093                 }
2094                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2095                         (void)printf(" truncated");
2096         }
2097         putchar('\n');
2098         if (nilen <= 0)
2099                 printf("  no address\n");
2100
2101         /*
2102          * In icmp-name-lookups 05 and later, TTL of each returned address
2103          * is contained in the resposne. We try to detect the version
2104          * by the length of the data, but note that the detection algorithm
2105          * is incomplete. We assume the latest draft by default.
2106          */
2107         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
2108                 withttl = 1;
2109         while (nilen > 0) {
2110                 u_int32_t ttl;
2111
2112                 if (withttl) {
2113                         /* XXX: alignment? */
2114                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
2115                         cp += sizeof(u_int32_t);
2116                         nilen -= sizeof(u_int32_t);
2117                 }
2118
2119                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2120                     NULL)
2121                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2122                 printf("  %s", ntop_buf);
2123                 if (withttl) {
2124                         if (ttl == 0xffffffff) {
2125                                 /*
2126                                  * XXX: can this convention be applied to all
2127                                  * type of TTL (i.e. non-ND TTL)?
2128                                  */
2129                                 printf("(TTL=infty)");
2130                         }
2131                         else
2132                                 printf("(TTL=%u)", ttl);
2133                 }
2134                 putchar('\n');
2135
2136                 nilen -= sizeof(struct in6_addr);
2137                 cp += sizeof(struct in6_addr);
2138         }
2139 }
2140
2141 int
2142 get_hoplim(mhdr)
2143         struct msghdr *mhdr;
2144 {
2145         struct cmsghdr *cm;
2146
2147         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2148              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2149                 if (cm->cmsg_len == 0)
2150                         return(-1);
2151
2152                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2153                     cm->cmsg_type == IPV6_HOPLIMIT &&
2154                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
2155                         return(*(int *)CMSG_DATA(cm));
2156         }
2157
2158         return(-1);
2159 }
2160
2161 struct in6_pktinfo *
2162 get_rcvpktinfo(mhdr)
2163         struct msghdr *mhdr;
2164 {
2165         struct cmsghdr *cm;
2166
2167         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2168              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2169                 if (cm->cmsg_len == 0)
2170                         return(NULL);
2171
2172                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2173                     cm->cmsg_type == IPV6_PKTINFO &&
2174                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2175                         return((struct in6_pktinfo *)CMSG_DATA(cm));
2176         }
2177
2178         return(NULL);
2179 }
2180
2181 int
2182 get_pathmtu(mhdr)
2183         struct msghdr *mhdr;
2184 {
2185 #ifdef IPV6_RECVPATHMTU
2186         struct cmsghdr *cm;
2187         struct ip6_mtuinfo *mtuctl = NULL;
2188
2189         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2190              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2191                 if (cm->cmsg_len == 0)
2192                         return(0);
2193
2194                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2195                     cm->cmsg_type == IPV6_PATHMTU &&
2196                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2197                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2198
2199                         /*
2200                          * If the notified destination is different from
2201                          * the one we are pinging, just ignore the info.
2202                          * We check the scope ID only when both notified value
2203                          * and our own value have non-0 values, because we may
2204                          * have used the default scope zone ID for sending,
2205                          * in which case the scope ID value is 0.
2206                          */
2207                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2208                                                 &dst.sin6_addr) ||
2209                             (mtuctl->ip6m_addr.sin6_scope_id &&
2210                              dst.sin6_scope_id &&
2211                              mtuctl->ip6m_addr.sin6_scope_id !=
2212                              dst.sin6_scope_id)) {
2213                                 if ((options & F_VERBOSE) != 0) {
2214                                         printf("path MTU for %s is notified. "
2215                                                "(ignored)\n",
2216                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2217                                            sizeof(mtuctl->ip6m_addr)));
2218                                 }
2219                                 return(0);
2220                         }
2221
2222                         /*
2223                          * Ignore an invalid MTU. XXX: can we just believe
2224                          * the kernel check?
2225                          */
2226                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2227                                 return(0);
2228
2229                         /* notification for our destination. return the MTU. */
2230                         return((int)mtuctl->ip6m_mtu);
2231                 }
2232         }
2233 #endif
2234         return(0);
2235 }
2236
2237 /*
2238  * tvsub --
2239  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2240  * be >= in.
2241  */
2242 void
2243 tvsub(out, in)
2244         struct timeval *out, *in;
2245 {
2246         if ((out->tv_usec -= in->tv_usec) < 0) {
2247                 --out->tv_sec;
2248                 out->tv_usec += 1000000;
2249         }
2250         out->tv_sec -= in->tv_sec;
2251 }
2252
2253 /*
2254  * onint --
2255  *      SIGINT handler.
2256  */
2257 /* ARGSUSED */
2258 void
2259 onint(notused)
2260         int notused;
2261 {
2262         summary();
2263
2264         (void)signal(SIGINT, SIG_DFL);
2265         (void)kill(getpid(), SIGINT);
2266
2267         /* NOTREACHED */
2268         exit(1);
2269 }
2270
2271 /*
2272  * summary --
2273  *      Print out statistics.
2274  */
2275 void
2276 summary()
2277 {
2278
2279         (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2280         (void)printf("%ld packets transmitted, ", ntransmitted);
2281         (void)printf("%ld packets received, ", nreceived);
2282         if (nrepeats)
2283                 (void)printf("+%ld duplicates, ", nrepeats);
2284         if (ntransmitted) {
2285                 if (nreceived > ntransmitted)
2286                         (void)printf("-- somebody's duplicating packets!");
2287                 else
2288                         (void)printf("%.1f%% packet loss",
2289                             ((((double)ntransmitted - nreceived) * 100.0) /
2290                             ntransmitted));
2291         }
2292         (void)putchar('\n');
2293         if (nreceived && timing) {
2294                 /* Only display average to microseconds */
2295                 double num = nreceived + nrepeats;
2296                 double avg = tsum / num;
2297                 double dev = sqrt(tsumsq / num - avg * avg);
2298                 (void)printf(
2299                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2300                     tmin, avg, tmax, dev);
2301                 (void)fflush(stdout);
2302         }
2303         (void)fflush(stdout);
2304 }
2305
2306 /*subject type*/
2307 static const char *niqcode[] = {
2308         "IPv6 address",
2309         "DNS label",    /*or empty*/
2310         "IPv4 address",
2311 };
2312
2313 /*result code*/
2314 static const char *nircode[] = {
2315         "Success", "Refused", "Unknown",
2316 };
2317
2318
2319 /*
2320  * pr_icmph --
2321  *      Print a descriptive string about an ICMP header.
2322  */
2323 void
2324 pr_icmph(icp, end)
2325         struct icmp6_hdr *icp;
2326         u_char *end;
2327 {
2328         char ntop_buf[INET6_ADDRSTRLEN];
2329         struct nd_redirect *red;
2330         struct icmp6_nodeinfo *ni;
2331         char dnsname[MAXDNAME + 1];
2332         const u_char *cp;
2333         size_t l;
2334
2335         switch (icp->icmp6_type) {
2336         case ICMP6_DST_UNREACH:
2337                 switch (icp->icmp6_code) {
2338                 case ICMP6_DST_UNREACH_NOROUTE:
2339                         (void)printf("No Route to Destination\n");
2340                         break;
2341                 case ICMP6_DST_UNREACH_ADMIN:
2342                         (void)printf("Destination Administratively "
2343                             "Unreachable\n");
2344                         break;
2345                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2346                         (void)printf("Destination Unreachable Beyond Scope\n");
2347                         break;
2348                 case ICMP6_DST_UNREACH_ADDR:
2349                         (void)printf("Destination Host Unreachable\n");
2350                         break;
2351                 case ICMP6_DST_UNREACH_NOPORT:
2352                         (void)printf("Destination Port Unreachable\n");
2353                         break;
2354                 default:
2355                         (void)printf("Destination Unreachable, Bad Code: %d\n",
2356                             icp->icmp6_code);
2357                         break;
2358                 }
2359                 /* Print returned IP header information */
2360                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2361                 break;
2362         case ICMP6_PACKET_TOO_BIG:
2363                 (void)printf("Packet too big mtu = %d\n",
2364                     (int)ntohl(icp->icmp6_mtu));
2365                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2366                 break;
2367         case ICMP6_TIME_EXCEEDED:
2368                 switch (icp->icmp6_code) {
2369                 case ICMP6_TIME_EXCEED_TRANSIT:
2370                         (void)printf("Time to live exceeded\n");
2371                         break;
2372                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2373                         (void)printf("Frag reassembly time exceeded\n");
2374                         break;
2375                 default:
2376                         (void)printf("Time exceeded, Bad Code: %d\n",
2377                             icp->icmp6_code);
2378                         break;
2379                 }
2380                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2381                 break;
2382         case ICMP6_PARAM_PROB:
2383                 (void)printf("Parameter problem: ");
2384                 switch (icp->icmp6_code) {
2385                 case ICMP6_PARAMPROB_HEADER:
2386                         (void)printf("Erroneous Header ");
2387                         break;
2388                 case ICMP6_PARAMPROB_NEXTHEADER:
2389                         (void)printf("Unknown Nextheader ");
2390                         break;
2391                 case ICMP6_PARAMPROB_OPTION:
2392                         (void)printf("Unrecognized Option ");
2393                         break;
2394                 default:
2395                         (void)printf("Bad code(%d) ", icp->icmp6_code);
2396                         break;
2397                 }
2398                 (void)printf("pointer = 0x%02x\n",
2399                     (u_int32_t)ntohl(icp->icmp6_pptr));
2400                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2401                 break;
2402         case ICMP6_ECHO_REQUEST:
2403                 (void)printf("Echo Request");
2404                 /* XXX ID + Seq + Data */
2405                 break;
2406         case ICMP6_ECHO_REPLY:
2407                 (void)printf("Echo Reply");
2408                 /* XXX ID + Seq + Data */
2409                 break;
2410         case ICMP6_MEMBERSHIP_QUERY:
2411                 (void)printf("Listener Query");
2412                 break;
2413         case ICMP6_MEMBERSHIP_REPORT:
2414                 (void)printf("Listener Report");
2415                 break;
2416         case ICMP6_MEMBERSHIP_REDUCTION:
2417                 (void)printf("Listener Done");
2418                 break;
2419         case ND_ROUTER_SOLICIT:
2420                 (void)printf("Router Solicitation");
2421                 break;
2422         case ND_ROUTER_ADVERT:
2423                 (void)printf("Router Advertisement");
2424                 break;
2425         case ND_NEIGHBOR_SOLICIT:
2426                 (void)printf("Neighbor Solicitation");
2427                 break;
2428         case ND_NEIGHBOR_ADVERT:
2429                 (void)printf("Neighbor Advertisement");
2430                 break;
2431         case ND_REDIRECT:
2432                 red = (struct nd_redirect *)icp;
2433                 (void)printf("Redirect\n");
2434                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2435                     sizeof(ntop_buf)))
2436                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2437                 (void)printf("Destination: %s", ntop_buf);
2438                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2439                     sizeof(ntop_buf)))
2440                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2441                 (void)printf(" New Target: %s", ntop_buf);
2442                 break;
2443         case ICMP6_NI_QUERY:
2444                 (void)printf("Node Information Query");
2445                 /* XXX ID + Seq + Data */
2446                 ni = (struct icmp6_nodeinfo *)icp;
2447                 l = end - (u_char *)(ni + 1);
2448                 printf(", ");
2449                 switch (ntohs(ni->ni_qtype)) {
2450                 case NI_QTYPE_NOOP:
2451                         (void)printf("NOOP");
2452                         break;
2453                 case NI_QTYPE_SUPTYPES:
2454                         (void)printf("Supported qtypes");
2455                         break;
2456                 case NI_QTYPE_FQDN:
2457                         (void)printf("DNS name");
2458                         break;
2459                 case NI_QTYPE_NODEADDR:
2460                         (void)printf("nodeaddr");
2461                         break;
2462                 case NI_QTYPE_IPV4ADDR:
2463                         (void)printf("IPv4 nodeaddr");
2464                         break;
2465                 default:
2466                         (void)printf("unknown qtype");
2467                         break;
2468                 }
2469                 if (options & F_VERBOSE) {
2470                         switch (ni->ni_code) {
2471                         case ICMP6_NI_SUBJ_IPV6:
2472                                 if (l == sizeof(struct in6_addr) &&
2473                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2474                                     sizeof(ntop_buf)) != NULL) {
2475                                         (void)printf(", subject=%s(%s)",
2476                                             niqcode[ni->ni_code], ntop_buf);
2477                                 } else {
2478 #if 1
2479                                         /* backward compat to -W */
2480                                         (void)printf(", oldfqdn");
2481 #else
2482                                         (void)printf(", invalid");
2483 #endif
2484                                 }
2485                                 break;
2486                         case ICMP6_NI_SUBJ_FQDN:
2487                                 if (end == (u_char *)(ni + 1)) {
2488                                         (void)printf(", no subject");
2489                                         break;
2490                                 }
2491                                 printf(", subject=%s", niqcode[ni->ni_code]);
2492                                 cp = (const u_char *)(ni + 1);
2493                                 if (dnsdecode(&cp, end, NULL, dnsname,
2494                                     sizeof(dnsname)) != NULL)
2495                                         printf("(%s)", dnsname);
2496                                 else
2497                                         printf("(invalid)");
2498                                 break;
2499                         case ICMP6_NI_SUBJ_IPV4:
2500                                 if (l == sizeof(struct in_addr) &&
2501                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2502                                     sizeof(ntop_buf)) != NULL) {
2503                                         (void)printf(", subject=%s(%s)",
2504                                             niqcode[ni->ni_code], ntop_buf);
2505                                 } else
2506                                         (void)printf(", invalid");
2507                                 break;
2508                         default:
2509                                 (void)printf(", invalid");
2510                                 break;
2511                         }
2512                 }
2513                 break;
2514         case ICMP6_NI_REPLY:
2515                 (void)printf("Node Information Reply");
2516                 /* XXX ID + Seq + Data */
2517                 ni = (struct icmp6_nodeinfo *)icp;
2518                 printf(", ");
2519                 switch (ntohs(ni->ni_qtype)) {
2520                 case NI_QTYPE_NOOP:
2521                         (void)printf("NOOP");
2522                         break;
2523                 case NI_QTYPE_SUPTYPES:
2524                         (void)printf("Supported qtypes");
2525                         break;
2526                 case NI_QTYPE_FQDN:
2527                         (void)printf("DNS name");
2528                         break;
2529                 case NI_QTYPE_NODEADDR:
2530                         (void)printf("nodeaddr");
2531                         break;
2532                 case NI_QTYPE_IPV4ADDR:
2533                         (void)printf("IPv4 nodeaddr");
2534                         break;
2535                 default:
2536                         (void)printf("unknown qtype");
2537                         break;
2538                 }
2539                 if (options & F_VERBOSE) {
2540                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2541                                 printf(", invalid");
2542                         else
2543                                 printf(", %s", nircode[ni->ni_code]);
2544                 }
2545                 break;
2546         default:
2547                 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2548         }
2549 }
2550
2551 /*
2552  * pr_iph --
2553  *      Print an IP6 header.
2554  */
2555 void
2556 pr_iph(ip6)
2557         struct ip6_hdr *ip6;
2558 {
2559         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2560         u_int8_t tc;
2561         char ntop_buf[INET6_ADDRSTRLEN];
2562
2563         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2564         tc = (tc >> 4) & 0x0f;
2565         tc |= (ip6->ip6_vfc << 4);
2566
2567         printf("Vr TC  Flow Plen Nxt Hlim\n");
2568         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2569             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2570             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2571         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2572                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2573         printf("%s->", ntop_buf);
2574         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2575                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2576         printf("%s\n", ntop_buf);
2577 }
2578
2579 /*
2580  * pr_addr --
2581  *      Return an ascii host address as a dotted quad and optionally with
2582  * a hostname.
2583  */
2584 const char *
2585 pr_addr(addr, addrlen)
2586         struct sockaddr *addr;
2587         int addrlen;
2588 {
2589         static char buf[NI_MAXHOST];
2590         int flag = 0;
2591
2592         if ((options & F_HOSTNAME) == 0)
2593                 flag |= NI_NUMERICHOST;
2594
2595         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2596                 return (buf);
2597         else
2598                 return "?";
2599 }
2600
2601 /*
2602  * pr_retip --
2603  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2604  */
2605 void
2606 pr_retip(ip6, end)
2607         struct ip6_hdr *ip6;
2608         u_char *end;
2609 {
2610         u_char *cp = (u_char *)ip6, nh;
2611         int hlen;
2612
2613         if (end - (u_char *)ip6 < sizeof(*ip6)) {
2614                 printf("IP6");
2615                 goto trunc;
2616         }
2617         pr_iph(ip6);
2618         hlen = sizeof(*ip6);
2619
2620         nh = ip6->ip6_nxt;
2621         cp += hlen;
2622         while (end - cp >= 8) {
2623                 switch (nh) {
2624                 case IPPROTO_HOPOPTS:
2625                         printf("HBH ");
2626                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2627                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2628                         break;
2629                 case IPPROTO_DSTOPTS:
2630                         printf("DSTOPT ");
2631                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2632                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2633                         break;
2634                 case IPPROTO_FRAGMENT:
2635                         printf("FRAG ");
2636                         hlen = sizeof(struct ip6_frag);
2637                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2638                         break;
2639                 case IPPROTO_ROUTING:
2640                         printf("RTHDR ");
2641                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2642                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2643                         break;
2644 #ifdef IPSEC
2645                 case IPPROTO_AH:
2646                         printf("AH ");
2647                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2648                         nh = ((struct ah *)cp)->ah_nxt;
2649                         break;
2650 #endif
2651                 case IPPROTO_ICMPV6:
2652                         printf("ICMP6: type = %d, code = %d\n",
2653                             *cp, *(cp + 1));
2654                         return;
2655                 case IPPROTO_ESP:
2656                         printf("ESP\n");
2657                         return;
2658                 case IPPROTO_TCP:
2659                         printf("TCP: from port %u, to port %u (decimal)\n",
2660                             (*cp * 256 + *(cp + 1)),
2661                             (*(cp + 2) * 256 + *(cp + 3)));
2662                         return;
2663                 case IPPROTO_UDP:
2664                         printf("UDP: from port %u, to port %u (decimal)\n",
2665                             (*cp * 256 + *(cp + 1)),
2666                             (*(cp + 2) * 256 + *(cp + 3)));
2667                         return;
2668                 default:
2669                         printf("Unknown Header(%d)\n", nh);
2670                         return;
2671                 }
2672
2673                 if ((cp += hlen) >= end)
2674                         goto trunc;
2675         }
2676         if (end - cp < 8)
2677                 goto trunc;
2678
2679         putchar('\n');
2680         return;
2681
2682   trunc:
2683         printf("...\n");
2684         return;
2685 }
2686
2687 void
2688 fill(bp, patp)
2689         char *bp, *patp;
2690 {
2691         int ii, jj, kk;
2692         int pat[16];
2693         char *cp;
2694
2695         for (cp = patp; *cp; cp++)
2696                 if (!isxdigit(*cp))
2697                         errx(1, "patterns must be specified as hex digits");
2698         ii = sscanf(patp,
2699             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2700             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2701             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2702             &pat[13], &pat[14], &pat[15]);
2703
2704 /* xxx */
2705         if (ii > 0)
2706                 for (kk = 0;
2707                     kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii);
2708                     kk += ii)
2709                         for (jj = 0; jj < ii; ++jj)
2710                                 bp[jj + kk] = pat[jj];
2711         if (!(options & F_QUIET)) {
2712                 (void)printf("PATTERN: 0x");
2713                 for (jj = 0; jj < ii; ++jj)
2714                         (void)printf("%02x", bp[jj] & 0xFF);
2715                 (void)printf("\n");
2716         }
2717 }
2718
2719 #ifdef IPSEC
2720 #ifdef IPSEC_POLICY_IPSEC
2721 int
2722 setpolicy(so, policy)
2723         int so;
2724         char *policy;
2725 {
2726         char *buf;
2727
2728         if (policy == NULL)
2729                 return 0;       /* ignore */
2730
2731         buf = ipsec_set_policy(policy, strlen(policy));
2732         if (buf == NULL)
2733                 errx(1, "%s", ipsec_strerror());
2734         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2735             ipsec_get_policylen(buf)) < 0)
2736                 warnx("Unable to set IPsec policy");
2737         free(buf);
2738
2739         return 0;
2740 }
2741 #endif
2742 #endif
2743
2744 char *
2745 nigroup(name)
2746         char *name;
2747 {
2748         char *p;
2749         char *q;
2750         MD5_CTX ctxt;
2751         u_int8_t digest[16];
2752         u_int8_t c;
2753         size_t l;
2754         char hbuf[NI_MAXHOST];
2755         struct in6_addr in6;
2756
2757         p = strchr(name, '.');
2758         if (!p)
2759                 p = name + strlen(name);
2760         l = p - name;
2761         if (l > 63 || l > sizeof(hbuf) - 1)
2762                 return NULL;    /*label too long*/
2763         strncpy(hbuf, name, l);
2764         hbuf[(int)l] = '\0';
2765
2766         for (q = name; *q; q++) {
2767                 if (isupper(*(unsigned char *)q))
2768                         *q = tolower(*(unsigned char *)q);
2769         }
2770
2771         /* generate 8 bytes of pseudo-random value. */
2772         memset(&ctxt, 0, sizeof(ctxt));
2773         MD5Init(&ctxt);
2774         c = l & 0xff;
2775         MD5Update(&ctxt, &c, sizeof(c));
2776         MD5Update(&ctxt, (unsigned char *)name, l);
2777         MD5Final(digest, &ctxt);
2778
2779         if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1)
2780                 return NULL;    /*XXX*/
2781         bcopy(digest, &in6.s6_addr[12], 4);
2782
2783         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2784                 return NULL;
2785
2786         return strdup(hbuf);
2787 }
2788
2789 void
2790 usage()
2791 {
2792         (void)fprintf(stderr,
2793 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2794             "A"
2795 #endif
2796             "usage: ping6 [-"
2797             "Dd"
2798 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2799             "E"
2800 #endif
2801             "fH"
2802 #ifdef IPV6_USE_MIN_MTU
2803             "m"
2804 #endif
2805             "nNoqrRtvwW] "
2806             "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2807             "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2808 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2809             " [-P policy]"
2810 #endif
2811             "\n"
2812             "             [-p pattern] [-S sourceaddr] [-s packetsize] "
2813             "[hops ...] host\n");
2814         exit(1);
2815 }