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  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  */
  65
  66 #ifndef lint
  67 static const char copyright[] =
  68 "@(#) Copyright (c) 1989, 1993\n\
  69         The Regents of the University of California.  All rights reserved.\n";
  70 #endif /* not lint */
  71
  72 #ifndef lint
  73 #if 0
  74 static char sccsid[] = "@(#)ping.c      8.1 (Berkeley) 6/5/93";
  75 #endif
  76 #endif /* not lint */
  77
  78 #include <sys/cdefs.h>
  79 __FBSDID("$FreeBSD$");
  80
  81 /*
  82  * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
  83  * measure round-trip-delays and packet loss across network paths.
  84  *
  85  * Author -
  86  *      Mike Muuss
  87  *      U. S. Army Ballistic Research Laboratory
  88  *      December, 1983
  89  *
  90  * Status -
  91  *      Public Domain.  Distribution Unlimited.
  92  * Bugs -
  93  *      More statistics could always be gathered.
  94  *      This program has to run SUID to ROOT to access the ICMP socket.
  95  */
  96 /*
  97  * NOTE:
  98  * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
  99  * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
 100  * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
 101  * network attached to 1 or more interfaces)
 102  */
 103
 104 #include <sys/param.h>
 105 #include <sys/uio.h>
 106 #include <sys/socket.h>
 107 #include <sys/time.h>
 108
 109 #include <net/if.h>
 110 #include <net/route.h>
 111
 112 #include <netinet/in.h>
 113 #include <netinet/ip6.h>
 114 #include <netinet/icmp6.h>
 115 #include <arpa/inet.h>
 116 #include <arpa/nameser.h>
 117 #include <netdb.h>
 118
 119 #include <ctype.h>
 120 #include <err.h>
 121 #include <errno.h>
 122 #include <fcntl.h>
 123 #include <math.h>
 124 #include <signal.h>
 125 #include <stdio.h>
 126 #include <stdlib.h>
 127 #include <string.h>
 128 #include <unistd.h>
 129 #ifdef HAVE_POLL_H
 130 #include <poll.h>
 131 #endif
 132
 133 #ifdef IPSEC
 134 #include <netipsec/ah.h>
 135 #include <netipsec/ipsec.h>
 136 #endif
 137
 138 #include <md5.h>
 139
 140 struct tv32 {
 141         u_int32_t tv32_sec;
 142         u_int32_t tv32_usec;
 143 };
 144
 145 #define MAXPACKETLEN    131072
 146 #define IP6LEN          40
 147 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 148 #define ICMP6ECHOTMLEN sizeof(struct tv32)
 149 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 150 # define CONTROLLEN     10240   /* ancillary data buffer size RFC3542 20.1 */
 151 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 152 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 153 #define EXTRA           256     /* for AH and various other headers. weird. */
 154 #define DEFDATALEN      ICMP6ECHOTMLEN
 155 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 156 #define NROUTES         9               /* number of record route slots */
 157
 158 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 159 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 160 #define SET(bit)        (A(bit) |= B(bit))
 161 #define CLR(bit)        (A(bit) &= (~B(bit)))
 162 #define TST(bit)        (A(bit) & B(bit))
 163
 164 #define F_FLOOD         0x0001
 165 #define F_INTERVAL      0x0002
 166 #define F_PINGFILLED    0x0008
 167 #define F_QUIET         0x0010
 168 #define F_RROUTE        0x0020
 169 #define F_SO_DEBUG      0x0040
 170 #define F_VERBOSE       0x0100
 171 #ifdef IPSEC
 172 #ifdef IPSEC_POLICY_IPSEC
 173 #define F_POLICY        0x0400
 174 #else
 175 #define F_AUTHHDR       0x0200
 176 #define F_ENCRYPT       0x0400
 177 #endif /*IPSEC_POLICY_IPSEC*/
 178 #endif /*IPSEC*/
 179 #define F_NODEADDR      0x0800
 180 #define F_FQDN          0x1000
 181 #define F_INTERFACE     0x2000
 182 #define F_SRCADDR       0x4000
 183 #define F_HOSTNAME      0x10000
 184 #define F_FQDNOLD       0x20000
 185 #define F_NIGROUP       0x40000
 186 #define F_SUPTYPES      0x80000
 187 #define F_NOMINMTU      0x100000
 188 #define F_ONCE          0x200000
 189 #define F_AUDIBLE       0x400000
 190 #define F_MISSED        0x800000
 191 #define F_DONTFRAG      0x1000000
 192 #define F_NOUSERDATA    (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
 193 u_int options;
 194
 195 #define IN6LEN          sizeof(struct in6_addr)
 196 #define SA6LEN          sizeof(struct sockaddr_in6)
 197 #define DUMMY_PORT      10101
 198
 199 #define SIN6(s) ((struct sockaddr_in6 *)(s))
 200
 201 /*
 202  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 203  * number of received sequence numbers we can keep track of.  Change 128
 204  * to 8192 for complete accuracy...
 205  */
 206 #define MAX_DUP_CHK     (8 * 8192)
 207 int mx_dup_ck = MAX_DUP_CHK;
 208 char rcvd_tbl[MAX_DUP_CHK / 8];
 209
 210 struct addrinfo *res = NULL;
 211 struct sockaddr_in6 dst;        /* who to ping6 */
 212 struct sockaddr_in6 src;        /* src addr of this packet */
 213 socklen_t srclen;
 214 int datalen = DEFDATALEN;
 215 int s;                          /* socket file descriptor */
 216 u_char outpack[MAXPACKETLEN];
 217 char BSPACE = '\b';             /* characters written for flood */
 218 char BBELL = '\a';              /* characters written for AUDIBLE */
 219 char DOT = '.';
 220 char *hostname;
 221 int ident;                      /* process id to identify our packets */
 222 u_int8_t nonce[8];              /* nonce field for node information */
 223 int hoplimit = -1;              /* hoplimit */
 224 int pathmtu = 0;                /* path MTU for the destination.  0 = unspec. */
 225 u_char *packet = NULL;
 226 #ifdef HAVE_POLL_H
 227 struct pollfd fdmaskp[1];
 228 #else
 229 fd_set *fdmaskp = NULL;
 230 int fdmasks;
 231 #endif
 232
 233 /* counters */
 234 long nmissedmax;                /* max value of ntransmitted - nreceived - 1 */
 235 long npackets;                  /* max packets to transmit */
 236 long nreceived;                 /* # of packets we got back */
 237 long nrepeats;                  /* number of duplicates */
 238 long ntransmitted;              /* sequence # for outbound packets = #sent */
 239 struct timeval interval = {1, 0}; /* interval between packets */
 240
 241 /* timing */
 242 int timing;                     /* flag to do timing */
 243 double tmin = 999999999.0;      /* minimum round trip time */
 244 double tmax = 0.0;              /* maximum round trip time */
 245 double tsum = 0.0;              /* sum of all times, for doing average */
 246 double tsumsq = 0.0;            /* sum of all times squared, for std. dev. */
 247
 248 /* for node addresses */
 249 u_short naflags;
 250
 251 /* for ancillary data(advanced API) */
 252 struct msghdr smsghdr;
 253 struct iovec smsgiov;
 254 char *scmsg = 0;
 255
 256 volatile sig_atomic_t seenalrm;
 257 volatile sig_atomic_t seenint;
 258 #ifdef SIGINFO
 259 volatile sig_atomic_t seeninfo;
 260 #endif
 261
 262 int      main(int, char *[]);
 263 void     fill(char *, char *);
 264 int      get_hoplim(struct msghdr *);
 265 int      get_pathmtu(struct msghdr *);
 266 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
 267 void     onsignal(int);
 268 void     retransmit(void);
 269 void     onint(int);
 270 size_t   pingerlen(void);
 271 int      pinger(void);
 272 const char *pr_addr(struct sockaddr *, int);
 273 void     pr_icmph(struct icmp6_hdr *, u_char *);
 274 void     pr_iph(struct ip6_hdr *);
 275 void     pr_suptypes(struct icmp6_nodeinfo *, size_t);
 276 void     pr_nodeaddr(struct icmp6_nodeinfo *, int);
 277 int      myechoreply(const struct icmp6_hdr *);
 278 int      mynireply(const struct icmp6_nodeinfo *);
 279 char *dnsdecode(const u_char **, const u_char *, const u_char *,
 280         char *, size_t);
 281 void     pr_pack(u_char *, int, struct msghdr *);
 282 void     pr_exthdrs(struct msghdr *);
 283 void     pr_ip6opt(void *, size_t);
 284 void     pr_rthdr(void *, size_t);
 285 int      pr_bitrange(u_int32_t, int, int);
 286 void     pr_retip(struct ip6_hdr *, u_char *);
 287 void     summary(void);
 288 void     tvsub(struct timeval *, struct timeval *);
 289 int      setpolicy(int, char *);
 290 char    *nigroup(char *, int);
 291 void     usage(void);
 292
 293 int
 294 main(int argc, char *argv[])
 295 {
 296         struct itimerval itimer;
 297         struct sockaddr_in6 from;
 298 #ifndef HAVE_ARC4RANDOM
 299         struct timeval seed;
 300 #endif
 301 #ifdef HAVE_POLL_H
 302         int timeout;
 303 #else
 304         struct timeval timeout, *tv;
 305 #endif
 306         struct addrinfo hints;
 307         int cc, i;
 308         int ch, hold, packlen, preload, optval, ret_ga;
 309         int nig_oldmcprefix = -1;
 310         u_char *datap;
 311         char *e, *target, *ifname = NULL, *gateway = NULL;
 312         int ip6optlen = 0;
 313         struct cmsghdr *scmsgp = NULL;
 314         /* For control (ancillary) data received from recvmsg() */
 315         struct cmsghdr cm[CONTROLLEN];
 316 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 317         u_long lsockbufsize;
 318         int sockbufsize = 0;
 319 #endif
 320         int usepktinfo = 0;
 321         struct in6_pktinfo *pktinfo = NULL;
 322 #ifdef USE_RFC2292BIS
 323         struct ip6_rthdr *rthdr = NULL;
 324 #endif
 325 #ifdef IPSEC_POLICY_IPSEC
 326         char *policy_in = NULL;
 327         char *policy_out = NULL;
 328 #endif
 329         double intval;
 330         size_t rthlen;
 331 #ifdef IPV6_USE_MIN_MTU
 332         int mflag = 0;
 333 #endif
 334
 335         /* just to be sure */
 336         memset(&smsghdr, 0, sizeof(smsghdr));
 337         memset(&smsgiov, 0, sizeof(smsgiov));
 338
 339         preload = 0;
 340         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 341 #ifndef IPSEC
 342 #define ADDOPTS
 343 #else
 344 #ifdef IPSEC_POLICY_IPSEC
 345 #define ADDOPTS "P:"
 346 #else
 347 #define ADDOPTS "AE"
 348 #endif /*IPSEC_POLICY_IPSEC*/
 349 #endif
 350         while ((ch = getopt(argc, argv,
 351             "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwW" ADDOPTS)) != -1) {
 352 #undef ADDOPTS
 353                 switch (ch) {
 354                 case 'a':
 355                 {
 356                         char *cp;
 357
 358                         options &= ~F_NOUSERDATA;
 359                         options |= F_NODEADDR;
 360                         for (cp = optarg; *cp != '\0'; cp++) {
 361                                 switch (*cp) {
 362                                 case 'a':
 363                                         naflags |= NI_NODEADDR_FLAG_ALL;
 364                                         break;
 365                                 case 'c':
 366                                 case 'C':
 367                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 368                                         break;
 369                                 case 'l':
 370                                 case 'L':
 371                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 372                                         break;
 373                                 case 's':
 374                                 case 'S':
 375                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 376                                         break;
 377                                 case 'g':
 378                                 case 'G':
 379                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 380                                         break;
 381                                 case 'A': /* experimental. not in the spec */
 382 #ifdef NI_NODEADDR_FLAG_ANYCAST
 383                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 384                                         break;
 385 #else
 386                                         errx(1,
 387 "-a A is not supported on the platform");
 388                                         /*NOTREACHED*/
 389 #endif
 390                                 default:
 391                                         usage();
 392                                         /*NOTREACHED*/
 393                                 }
 394                         }
 395                         break;
 396                 }
 397                 case 'b':
 398 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 399                         errno = 0;
 400                         e = NULL;
 401                         lsockbufsize = strtoul(optarg, &e, 10);
 402                         sockbufsize = lsockbufsize;
 403                         if (errno || !*optarg || *e ||
 404                             sockbufsize != lsockbufsize)
 405                                 errx(1, "invalid socket buffer size");
 406 #else
 407                         errx(1,
 408 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 409 #endif
 410                         break;
 411                 case 'c':
 412                         npackets = strtol(optarg, &e, 10);
 413                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 414                                 errx(1,
 415                                     "illegal number of packets -- %s", optarg);
 416                         break;
 417                 case 'D':
 418                         options |= F_DONTFRAG;
 419                         break;
 420                 case 'd':
 421                         options |= F_SO_DEBUG;
 422                         break;
 423                 case 'f':
 424                         if (getuid()) {
 425                                 errno = EPERM;
 426                                 errx(1, "Must be superuser to flood ping");
 427                         }
 428                         options |= F_FLOOD;
 429                         setbuf(stdout, (char *)NULL);
 430                         break;
 431                 case 'g':
 432                         gateway = optarg;
 433                         break;
 434                 case 'H':
 435                         options |= F_HOSTNAME;
 436                         break;
 437                 case 'h':               /* hoplimit */
 438                         hoplimit = strtol(optarg, &e, 10);
 439                         if (*optarg == '\0' || *e != '\0')
 440                                 errx(1, "illegal hoplimit %s", optarg);
 441                         if (255 < hoplimit || hoplimit < -1)
 442                                 errx(1,
 443                                     "illegal hoplimit -- %s", optarg);
 444                         break;
 445                 case 'I':
 446                         ifname = optarg;
 447                         options |= F_INTERFACE;
 448 #ifndef USE_SIN6_SCOPE_ID
 449                         usepktinfo++;
 450 #endif
 451                         break;
 452                 case 'i':               /* wait between sending packets */
 453                         intval = strtod(optarg, &e);
 454                         if (*optarg == '\0' || *e != '\0')
 455                                 errx(1, "illegal timing interval %s", optarg);
 456                         if (intval < 1 && getuid()) {
 457                                 errx(1, "%s: only root may use interval < 1s",
 458                                     strerror(EPERM));
 459                         }
 460                         interval.tv_sec = (long)intval;
 461                         interval.tv_usec =
 462                             (long)((intval - interval.tv_sec) * 1000000);
 463                         if (interval.tv_sec < 0)
 464                                 errx(1, "illegal timing interval %s", optarg);
 465                         /* less than 1/hz does not make sense */
 466                         if (interval.tv_sec == 0 && interval.tv_usec < 1) {
 467                                 warnx("too small interval, raised to .000001");
 468                                 interval.tv_usec = 1;
 469                         }
 470                         options |= F_INTERVAL;
 471                         break;
 472                 case 'l':
 473                         if (getuid()) {
 474                                 errno = EPERM;
 475                                 errx(1, "Must be superuser to preload");
 476                         }
 477                         preload = strtol(optarg, &e, 10);
 478                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 479                                 errx(1, "illegal preload value -- %s", optarg);
 480                         break;
 481                 case 'm':
 482 #ifdef IPV6_USE_MIN_MTU
 483                         mflag++;
 484                         break;
 485 #else
 486                         errx(1, "-%c is not supported on this platform", ch);
 487                         /*NOTREACHED*/
 488 #endif
 489                 case 'n':
 490                         options &= ~F_HOSTNAME;
 491                         break;
 492                 case 'N':
 493                         options |= F_NIGROUP;
 494                         nig_oldmcprefix++;
 495                         break;
 496                 case 'o':
 497                         options |= F_ONCE;
 498                         break;
 499                 case 'p':               /* fill buffer with user pattern */
 500                         options |= F_PINGFILLED;
 501                         fill((char *)datap, optarg);
 502                                 break;
 503                 case 'q':
 504                         options |= F_QUIET;
 505                         break;
 506                 case 'r':
 507                         options |= F_AUDIBLE;
 508                         break;
 509                 case 'R':
 510                         options |= F_MISSED;
 511                         break;
 512                 case 'S':
 513                         memset(&hints, 0, sizeof(struct addrinfo));
 514                         hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
 515                         hints.ai_family = AF_INET6;
 516                         hints.ai_socktype = SOCK_RAW;
 517                         hints.ai_protocol = IPPROTO_ICMPV6;
 518
 519                         ret_ga = getaddrinfo(optarg, NULL, &hints, &res);
 520                         if (ret_ga) {
 521                                 errx(1, "invalid source address: %s",
 522                                      gai_strerror(ret_ga));
 523                         }
 524                         /*
 525                          * res->ai_family must be AF_INET6 and res->ai_addrlen
 526                          * must be sizeof(src).
 527                          */
 528                         memcpy(&src, res->ai_addr, res->ai_addrlen);
 529                         srclen = res->ai_addrlen;
 530                         freeaddrinfo(res);
 531                         res = NULL;
 532                         options |= F_SRCADDR;
 533                         break;
 534                 case 's':               /* size of packet to send */
 535                         datalen = strtol(optarg, &e, 10);
 536                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 537                                 errx(1, "illegal datalen value -- %s", optarg);
 538                         if (datalen > MAXDATALEN) {
 539                                 errx(1,
 540                                     "datalen value too large, maximum is %d",
 541                                     MAXDATALEN);
 542                         }
 543                         break;
 544                 case 't':
 545                         options &= ~F_NOUSERDATA;
 546                         options |= F_SUPTYPES;
 547                         break;
 548                 case 'v':
 549                         options |= F_VERBOSE;
 550                         break;
 551                 case 'w':
 552                         options &= ~F_NOUSERDATA;
 553                         options |= F_FQDN;
 554                         break;
 555                 case 'W':
 556                         options &= ~F_NOUSERDATA;
 557                         options |= F_FQDNOLD;
 558                         break;
 559 #ifdef IPSEC
 560 #ifdef IPSEC_POLICY_IPSEC
 561                 case 'P':
 562                         options |= F_POLICY;
 563                         if (!strncmp("in", optarg, 2)) {
 564                                 if ((policy_in = strdup(optarg)) == NULL)
 565                                         errx(1, "strdup");
 566                         } else if (!strncmp("out", optarg, 3)) {
 567                                 if ((policy_out = strdup(optarg)) == NULL)
 568                                         errx(1, "strdup");
 569                         } else
 570                                 errx(1, "invalid security policy");
 571                         break;
 572 #else
 573                 case 'A':
 574                         options |= F_AUTHHDR;
 575                         break;
 576                 case 'E':
 577                         options |= F_ENCRYPT;
 578                         break;
 579 #endif /*IPSEC_POLICY_IPSEC*/
 580 #endif /*IPSEC*/
 581                 default:
 582                         usage();
 583                         /*NOTREACHED*/
 584                 }
 585         }
 586
 587         argc -= optind;
 588         argv += optind;
 589
 590         if (argc < 1) {
 591                 usage();
 592                 /*NOTREACHED*/
 593         }
 594
 595         if (argc > 1) {
 596 #ifdef IPV6_RECVRTHDR   /* 2292bis */
 597                 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
 598                     argc - 1));
 599 #else  /* RFC2292 */
 600                 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
 601 #endif
 602                 if (rthlen == 0) {
 603                         errx(1, "too many intermediate hops");
 604                         /*NOTREACHED*/
 605                 }
 606                 ip6optlen += rthlen;
 607         }
 608
 609         if (options & F_NIGROUP) {
 610                 target = nigroup(argv[argc - 1], nig_oldmcprefix);
 611                 if (target == NULL) {
 612                         usage();
 613                         /*NOTREACHED*/
 614                 }
 615         } else
 616                 target = argv[argc - 1];
 617
 618         /* getaddrinfo */
 619         memset(&hints, 0, sizeof(struct addrinfo));
 620         hints.ai_flags = AI_CANONNAME;
 621         hints.ai_family = AF_INET6;
 622         hints.ai_socktype = SOCK_RAW;
 623         hints.ai_protocol = IPPROTO_ICMPV6;
 624
 625         ret_ga = getaddrinfo(target, NULL, &hints, &res);
 626         if (ret_ga)
 627                 errx(1, "%s", gai_strerror(ret_ga));
 628         if (res->ai_canonname)
 629                 hostname = res->ai_canonname;
 630         else
 631                 hostname = target;
 632
 633         if (!res->ai_addr)
 634                 errx(1, "getaddrinfo failed");
 635
 636         (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
 637
 638         if ((s = socket(res->ai_family, res->ai_socktype,
 639             res->ai_protocol)) < 0)
 640                 err(1, "socket");
 641
 642         /* set the source address if specified. */
 643         if ((options & F_SRCADDR) &&
 644             bind(s, (struct sockaddr *)&src, srclen) != 0) {
 645                 err(1, "bind");
 646         }
 647
 648         /* set the gateway (next hop) if specified */
 649         if (gateway) {
 650                 struct addrinfo ghints, *gres;
 651                 int error;
 652
 653                 memset(&ghints, 0, sizeof(ghints));
 654                 ghints.ai_family = AF_INET6;
 655                 ghints.ai_socktype = SOCK_RAW;
 656                 ghints.ai_protocol = IPPROTO_ICMPV6;
 657
 658                 error = getaddrinfo(gateway, NULL, &hints, &gres);
 659                 if (error) {
 660                         errx(1, "getaddrinfo for the gateway %s: %s",
 661                              gateway, gai_strerror(error));
 662                 }
 663                 if (gres->ai_next && (options & F_VERBOSE))
 664                         warnx("gateway resolves to multiple addresses");
 665
 666                 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
 667                                gres->ai_addr, gres->ai_addrlen)) {
 668                         err(1, "setsockopt(IPV6_NEXTHOP)");
 669                 }
 670
 671                 freeaddrinfo(gres);
 672         }
 673
 674         /*
 675          * let the kerel pass extension headers of incoming packets,
 676          * for privileged socket options
 677          */
 678         if ((options & F_VERBOSE) != 0) {
 679                 int opton = 1;
 680
 681 #ifdef IPV6_RECVHOPOPTS
 682                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 683                     sizeof(opton)))
 684                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 685 #else  /* old adv. API */
 686                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 687                     sizeof(opton)))
 688                         err(1, "setsockopt(IPV6_HOPOPTS)");
 689 #endif
 690 #ifdef IPV6_RECVDSTOPTS
 691                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 692                     sizeof(opton)))
 693                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 694 #else  /* old adv. API */
 695                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 696                     sizeof(opton)))
 697                         err(1, "setsockopt(IPV6_DSTOPTS)");
 698 #endif
 699 #ifdef IPV6_RECVRTHDRDSTOPTS
 700                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 701                     sizeof(opton)))
 702                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 703 #endif
 704         }
 705
 706         /* revoke root privilege */
 707         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 (;;) {
1085                 struct msghdr m;
1086                 struct iovec iov[2];
1087
1088                 /* signal handling */
1089                 if (seenalrm) {
1090                         /* last packet sent, timeout reached? */
1091                         if (npackets && ntransmitted >= npackets)
1092                                 break;
1093                         retransmit();
1094                         seenalrm = 0;
1095                         continue;
1096                 }
1097                 if (seenint) {
1098                         onint(SIGINT);
1099                         seenint = 0;
1100                         continue;
1101                 }
1102 #ifdef SIGINFO
1103                 if (seeninfo) {
1104                         summary();
1105                         seeninfo = 0;
1106                         continue;
1107                 }
1108 #endif
1109
1110                 if (options & F_FLOOD) {
1111                         (void)pinger();
1112 #ifdef HAVE_POLL_H
1113                         timeout = 10;
1114 #else
1115                         timeout.tv_sec = 0;
1116                         timeout.tv_usec = 10000;
1117                         tv = &timeout;
1118 #endif
1119                 } else {
1120 #ifdef HAVE_POLL_H
1121                         timeout = INFTIM;
1122 #else
1123                         tv = NULL;
1124 #endif
1125                 }
1126 #ifdef HAVE_POLL_H
1127                 fdmaskp[0].fd = s;
1128                 fdmaskp[0].events = POLLIN;
1129                 cc = poll(fdmaskp, 1, timeout);
1130 #else
1131                 memset(fdmaskp, 0, fdmasks);
1132                 FD_SET(s, fdmaskp);
1133                 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1134 #endif
1135                 if (cc < 0) {
1136                         if (errno != EINTR) {
1137 #ifdef HAVE_POLL_H
1138                                 warn("poll");
1139 #else
1140                                 warn("select");
1141 #endif
1142                                 sleep(1);
1143                         }
1144                         continue;
1145                 } else if (cc == 0)
1146                         continue;
1147
1148                 m.msg_name = (caddr_t)&from;
1149                 m.msg_namelen = sizeof(from);
1150                 memset(&iov, 0, sizeof(iov));
1151                 iov[0].iov_base = (caddr_t)packet;
1152                 iov[0].iov_len = packlen;
1153                 m.msg_iov = iov;
1154                 m.msg_iovlen = 1;
1155                 memset(cm, 0, CONTROLLEN);
1156                 m.msg_control = (void *)cm;
1157                 m.msg_controllen = CONTROLLEN;
1158
1159                 cc = recvmsg(s, &m, 0);
1160                 if (cc < 0) {
1161                         if (errno != EINTR) {
1162                                 warn("recvmsg");
1163                                 sleep(1);
1164                         }
1165                         continue;
1166                 } else if (cc == 0) {
1167                         int mtu;
1168
1169                         /*
1170                          * receive control messages only. Process the
1171                          * exceptions (currently the only possiblity is
1172                          * a path MTU notification.)
1173                          */
1174                         if ((mtu = get_pathmtu(&m)) > 0) {
1175                                 if ((options & F_VERBOSE) != 0) {
1176                                         printf("new path MTU (%d) is "
1177                                             "notified\n", mtu);
1178                                 }
1179                         }
1180                         continue;
1181                 } else {
1182                         /*
1183                          * an ICMPv6 message (probably an echoreply) arrived.
1184                          */
1185                         pr_pack(packet, cc, &m);
1186                 }
1187                 if (((options & F_ONCE) != 0 && nreceived > 0) ||
1188                     (npackets > 0 && nreceived >= npackets))
1189                         break;
1190                 if (ntransmitted - nreceived - 1 > nmissedmax) {
1191                         nmissedmax = ntransmitted - nreceived - 1;
1192                         if (options & F_MISSED)
1193                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1194                 }
1195         }
1196         summary();
1197
1198         if (res != NULL)
1199                 freeaddrinfo(res);
1200
1201         if(packet != NULL)
1202                 free(packet);
1203
1204 #ifndef HAVE_POLL_H
1205         if(fdmaskp != NULL)
1206                 free(fdmaskp);
1207 #endif
1208
1209         exit(nreceived == 0 ? 2 : 0);
1210 }
1211
1212 void
1213 onsignal(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(void)
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(void)
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(void)
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(const struct icmp6_hdr *icp)
1407 {
1408         if (ntohs(icp->icmp6_id) == ident)
1409                 return 1;
1410         else
1411                 return 0;
1412 }
1413
1414 int
1415 mynireply(const struct icmp6_nodeinfo *nip)
1416 {
1417         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1418             nonce + sizeof(u_int16_t),
1419             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1420                 return 1;
1421         else
1422                 return 0;
1423 }
1424
1425 char *
1426 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1427         size_t bufsiz)
1428         /*base for compressed name*/
1429 {
1430         int i;
1431         const u_char *cp;
1432         char cresult[MAXDNAME + 1];
1433         const u_char *comp;
1434         int l;
1435
1436         cp = *sp;
1437         *buf = '\0';
1438
1439         if (cp >= ep)
1440                 return NULL;
1441         while (cp < ep) {
1442                 i = *cp;
1443                 if (i == 0 || cp != *sp) {
1444                         if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1445                                 return NULL;    /*result overrun*/
1446                 }
1447                 if (i == 0)
1448                         break;
1449                 cp++;
1450
1451                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1452                         /* DNS compression */
1453                         if (!base)
1454                                 return NULL;
1455
1456                         comp = base + (i & 0x3f);
1457                         if (dnsdecode(&comp, cp, base, cresult,
1458                             sizeof(cresult)) == NULL)
1459                                 return NULL;
1460                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1461                                 return NULL;    /*result overrun*/
1462                         break;
1463                 } else if ((i & 0x3f) == i) {
1464                         if (i > ep - cp)
1465                                 return NULL;    /*source overrun*/
1466                         while (i-- > 0 && cp < ep) {
1467                                 l = snprintf(cresult, sizeof(cresult),
1468                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1469                                 if (l >= sizeof(cresult) || l < 0)
1470                                         return NULL;
1471                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1472                                         return NULL;    /*result overrun*/
1473                                 cp++;
1474                         }
1475                 } else
1476                         return NULL;    /*invalid label*/
1477         }
1478         if (i != 0)
1479                 return NULL;    /*not terminated*/
1480         cp++;
1481         *sp = cp;
1482         return buf;
1483 }
1484
1485 /*
1486  * pr_pack --
1487  *      Print out the packet, if it came from us.  This logic is necessary
1488  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1489  * which arrive ('tis only fair).  This permits multiple copies of this
1490  * program to be run without having intermingled output (or statistics!).
1491  */
1492 void
1493 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1494 {
1495 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1496         struct icmp6_hdr *icp;
1497         struct icmp6_nodeinfo *ni;
1498         int i;
1499         int hoplim;
1500         struct sockaddr *from;
1501         int fromlen;
1502         u_char *cp = NULL, *dp, *end = buf + cc;
1503         struct in6_pktinfo *pktinfo = NULL;
1504         struct timeval tv, tp;
1505         struct tv32 *tpp;
1506         double triptime = 0;
1507         int dupflag;
1508         size_t off;
1509         int oldfqdn;
1510         u_int16_t seq;
1511         char dnsname[MAXDNAME + 1];
1512
1513         (void)gettimeofday(&tv, NULL);
1514
1515         if (!mhdr || !mhdr->msg_name ||
1516             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1517             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1518                 if (options & F_VERBOSE)
1519                         warnx("invalid peername");
1520                 return;
1521         }
1522         from = (struct sockaddr *)mhdr->msg_name;
1523         fromlen = mhdr->msg_namelen;
1524         if (cc < sizeof(struct icmp6_hdr)) {
1525                 if (options & F_VERBOSE)
1526                         warnx("packet too short (%d bytes) from %s", cc,
1527                             pr_addr(from, fromlen));
1528                 return;
1529         }
1530         if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1531             (options & F_VERBOSE) != 0)
1532                 warnx("some control data discarded, insufficient buffer size");
1533         icp = (struct icmp6_hdr *)buf;
1534         ni = (struct icmp6_nodeinfo *)buf;
1535         off = 0;
1536
1537         if ((hoplim = get_hoplim(mhdr)) == -1) {
1538                 warnx("failed to get receiving hop limit");
1539                 return;
1540         }
1541         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1542                 warnx("failed to get receiving packet information");
1543                 return;
1544         }
1545
1546         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1547                 seq = ntohs(icp->icmp6_seq);
1548                 ++nreceived;
1549                 if (timing) {
1550                         tpp = (struct tv32 *)(icp + 1);
1551                         tp.tv_sec = ntohl(tpp->tv32_sec);
1552                         tp.tv_usec = ntohl(tpp->tv32_usec);
1553                         tvsub(&tv, &tp);
1554                         triptime = ((double)tv.tv_sec) * 1000.0 +
1555                             ((double)tv.tv_usec) / 1000.0;
1556                         tsum += triptime;
1557                         tsumsq += triptime * triptime;
1558                         if (triptime < tmin)
1559                                 tmin = triptime;
1560                         if (triptime > tmax)
1561                                 tmax = triptime;
1562                 }
1563
1564                 if (TST(seq % mx_dup_ck)) {
1565                         ++nrepeats;
1566                         --nreceived;
1567                         dupflag = 1;
1568                 } else {
1569                         SET(seq % mx_dup_ck);
1570                         dupflag = 0;
1571                 }
1572
1573                 if (options & F_QUIET)
1574                         return;
1575
1576                 if (options & F_FLOOD)
1577                         (void)write(STDOUT_FILENO, &BSPACE, 1);
1578                 else {
1579                         if (options & F_AUDIBLE)
1580                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1581                         (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1582                             pr_addr(from, fromlen), seq);
1583                         (void)printf(" hlim=%d", hoplim);
1584                         if ((options & F_VERBOSE) != 0) {
1585                                 struct sockaddr_in6 dstsa;
1586
1587                                 memset(&dstsa, 0, sizeof(dstsa));
1588                                 dstsa.sin6_family = AF_INET6;
1589                                 dstsa.sin6_len = sizeof(dstsa);
1590                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1591                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1592                                 (void)printf(" dst=%s",
1593                                     pr_addr((struct sockaddr *)&dstsa,
1594                                     sizeof(dstsa)));
1595                         }
1596                         if (timing)
1597                                 (void)printf(" time=%.3f ms", triptime);
1598                         if (dupflag)
1599                                 (void)printf("(DUP!)");
1600                         /* check the data */
1601                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1602                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1603                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1604                                 if (*cp != *dp) {
1605                                         (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1606                                         break;
1607                                 }
1608                         }
1609                 }
1610         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1611                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1612                 ++nreceived;
1613                 if (TST(seq % mx_dup_ck)) {
1614                         ++nrepeats;
1615                         --nreceived;
1616                         dupflag = 1;
1617                 } else {
1618                         SET(seq % mx_dup_ck);
1619                         dupflag = 0;
1620                 }
1621
1622                 if (options & F_QUIET)
1623                         return;
1624
1625                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1626
1627                 switch (ntohs(ni->ni_code)) {
1628                 case ICMP6_NI_SUCCESS:
1629                         break;
1630                 case ICMP6_NI_REFUSED:
1631                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1632                         goto fqdnend;
1633                 case ICMP6_NI_UNKNOWN:
1634                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1635                         goto fqdnend;
1636                 default:
1637                         printf("unknown code 0x%x, type 0x%x",
1638                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1639                         goto fqdnend;
1640                 }
1641
1642                 switch (ntohs(ni->ni_qtype)) {
1643                 case NI_QTYPE_NOOP:
1644                         printf("NodeInfo NOOP");
1645                         break;
1646                 case NI_QTYPE_SUPTYPES:
1647                         pr_suptypes(ni, end - (u_char *)ni);
1648                         break;
1649                 case NI_QTYPE_NODEADDR:
1650                         pr_nodeaddr(ni, end - (u_char *)ni);
1651                         break;
1652                 case NI_QTYPE_FQDN:
1653                 default:        /* XXX: for backward compatibility */
1654                         cp = (u_char *)ni + ICMP6_NIRLEN;
1655                         if (buf[off + ICMP6_NIRLEN] ==
1656                             cc - off - ICMP6_NIRLEN - 1)
1657                                 oldfqdn = 1;
1658                         else
1659                                 oldfqdn = 0;
1660                         if (oldfqdn) {
1661                                 cp++;   /* skip length */
1662                                 while (cp < end) {
1663                                         safeputc(*cp & 0xff);
1664                                         cp++;
1665                                 }
1666                         } else {
1667                                 i = 0;
1668                                 while (cp < end) {
1669                                         if (dnsdecode((const u_char **)&cp, end,
1670                                             (const u_char *)(ni + 1), dnsname,
1671                                             sizeof(dnsname)) == NULL) {
1672                                                 printf("???");
1673                                                 break;
1674                                         }
1675                                         /*
1676                                          * name-lookup special handling for
1677                                          * truncated name
1678                                          */
1679                                         if (cp + 1 <= end && !*cp &&
1680                                             strlen(dnsname) > 0) {
1681                                                 dnsname[strlen(dnsname) - 1] = '\0';
1682                                                 cp++;
1683                                         }
1684                                         printf("%s%s", i > 0 ? "," : "",
1685                                             dnsname);
1686                                 }
1687                         }
1688                         if (options & F_VERBOSE) {
1689                                 int32_t ttl;
1690                                 int comma = 0;
1691
1692                                 (void)printf(" (");     /*)*/
1693
1694                                 switch (ni->ni_code) {
1695                                 case ICMP6_NI_REFUSED:
1696                                         (void)printf("refused");
1697                                         comma++;
1698                                         break;
1699                                 case ICMP6_NI_UNKNOWN:
1700                                         (void)printf("unknown qtype");
1701                                         comma++;
1702                                         break;
1703                                 }
1704
1705                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1706                                         /* case of refusion, unknown */
1707                                         /*(*/
1708                                         putchar(')');
1709                                         goto fqdnend;
1710                                 }
1711                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1712                                 if (comma)
1713                                         printf(",");
1714                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1715                                         (void)printf("TTL=%d:meaningless",
1716                                             (int)ttl);
1717                                 } else {
1718                                         if (ttl < 0) {
1719                                                 (void)printf("TTL=%d:invalid",
1720                                                    ttl);
1721                                         } else
1722                                                 (void)printf("TTL=%d", ttl);
1723                                 }
1724                                 comma++;
1725
1726                                 if (oldfqdn) {
1727                                         if (comma)
1728                                                 printf(",");
1729                                         printf("03 draft");
1730                                         comma++;
1731                                 } else {
1732                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1733                                         if (cp == end) {
1734                                                 if (comma)
1735                                                         printf(",");
1736                                                 printf("no name");
1737                                                 comma++;
1738                                         }
1739                                 }
1740
1741                                 if (buf[off + ICMP6_NIRLEN] !=
1742                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1743                                         if (comma)
1744                                                 printf(",");
1745                                         (void)printf("invalid namelen:%d/%lu",
1746                                             buf[off + ICMP6_NIRLEN],
1747                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1748                                         comma++;
1749                                 }
1750                                 /*(*/
1751                                 putchar(')');
1752                         }
1753                 fqdnend:
1754                         ;
1755                 }
1756         } else {
1757                 /* We've got something other than an ECHOREPLY */
1758                 if (!(options & F_VERBOSE))
1759                         return;
1760                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1761                 pr_icmph(icp, end);
1762         }
1763
1764         if (!(options & F_FLOOD)) {
1765                 (void)putchar('\n');
1766                 if (options & F_VERBOSE)
1767                         pr_exthdrs(mhdr);
1768                 (void)fflush(stdout);
1769         }
1770 #undef safeputc
1771 }
1772
1773 void
1774 pr_exthdrs(struct msghdr *mhdr)
1775 {
1776         ssize_t bufsize;
1777         void    *bufp;
1778         struct cmsghdr *cm;
1779
1780         bufsize = 0;
1781         bufp = mhdr->msg_control;
1782         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1783              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1784                 if (cm->cmsg_level != IPPROTO_IPV6)
1785                         continue;
1786
1787                 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1788                 if (bufsize <= 0)
1789                         continue;
1790                 switch (cm->cmsg_type) {
1791                 case IPV6_HOPOPTS:
1792                         printf("  HbH Options: ");
1793                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1794                         break;
1795                 case IPV6_DSTOPTS:
1796 #ifdef IPV6_RTHDRDSTOPTS
1797                 case IPV6_RTHDRDSTOPTS:
1798 #endif
1799                         printf("  Dst Options: ");
1800                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1801                         break;
1802                 case IPV6_RTHDR:
1803                         printf("  Routing: ");
1804                         pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1805                         break;
1806                 }
1807         }
1808 }
1809
1810 #ifdef USE_RFC2292BIS
1811 void
1812 pr_ip6opt(void *extbuf, size_t bufsize)
1813 {
1814         struct ip6_hbh *ext;
1815         int currentlen;
1816         u_int8_t type;
1817         socklen_t extlen, len;
1818         void *databuf;
1819         size_t offset;
1820         u_int16_t value2;
1821         u_int32_t value4;
1822
1823         ext = (struct ip6_hbh *)extbuf;
1824         extlen = (ext->ip6h_len + 1) * 8;
1825         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1826             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1827
1828         /*
1829          * Bounds checking on the ancillary data buffer:
1830          *     subtract the size of a cmsg structure from the buffer size.
1831          */
1832         if (bufsize < (extlen  + CMSG_SPACE(0))) {
1833                 extlen = bufsize - CMSG_SPACE(0);
1834                 warnx("options truncated, showing only %u (total=%u)",
1835                     (unsigned int)(extlen / 8 - 1),
1836                     (unsigned int)(ext->ip6h_len));
1837         }
1838
1839         currentlen = 0;
1840         while (1) {
1841                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1842                     &type, &len, &databuf);
1843                 if (currentlen == -1)
1844                         break;
1845                 switch (type) {
1846                 /*
1847                  * Note that inet6_opt_next automatically skips any padding
1848                  * optins.
1849                  */
1850                 case IP6OPT_JUMBO:
1851                         offset = 0;
1852                         offset = inet6_opt_get_val(databuf, offset,
1853                             &value4, sizeof(value4));
1854                         printf("    Jumbo Payload Opt: Length %u\n",
1855                             (u_int32_t)ntohl(value4));
1856                         break;
1857                 case IP6OPT_ROUTER_ALERT:
1858                         offset = 0;
1859                         offset = inet6_opt_get_val(databuf, offset,
1860                                                    &value2, sizeof(value2));
1861                         printf("    Router Alert Opt: Type %u\n",
1862                             ntohs(value2));
1863                         break;
1864                 default:
1865                         printf("    Received Opt %u len %lu\n",
1866                             type, (unsigned long)len);
1867                         break;
1868                 }
1869         }
1870         return;
1871 }
1872 #else  /* !USE_RFC2292BIS */
1873 /* ARGSUSED */
1874 void
1875 pr_ip6opt(void *extbuf, size_t bufsize __unused)
1876 {
1877         putchar('\n');
1878         return;
1879 }
1880 #endif /* USE_RFC2292BIS */
1881
1882 #ifdef USE_RFC2292BIS
1883 void
1884 pr_rthdr(void *extbuf, size_t bufsize)
1885 {
1886         struct in6_addr *in6;
1887         char ntopbuf[INET6_ADDRSTRLEN];
1888         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1889         int i, segments, origsegs, rthsize, size0, size1;
1890
1891         /* print fixed part of the header */
1892         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1893             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1894         if ((segments = inet6_rth_segments(extbuf)) >= 0) {
1895                 printf("%d segments, ", segments);
1896                 printf("%d left\n", rh->ip6r_segleft);
1897         } else {
1898                 printf("segments unknown, ");
1899                 printf("%d left\n", rh->ip6r_segleft);
1900                 return;
1901         }
1902
1903         /*
1904          * Bounds checking on the ancillary data buffer. When calculating
1905          * the number of items to show keep in mind:
1906          *      - The size of the cmsg structure
1907          *      - The size of one segment (the size of a Type 0 routing header)
1908          *      - When dividing add a fudge factor of one in case the
1909          *        dividend is not evenly divisible by the divisor
1910          */
1911         rthsize = (rh->ip6r_len + 1) * 8;
1912         if (bufsize < (rthsize + CMSG_SPACE(0))) {
1913                 origsegs = segments;
1914                 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
1915                 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
1916                 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
1917                     (size1 - size0) + 1;
1918                 warnx("segments truncated, showing only %d (total=%d)",
1919                     segments, origsegs);
1920         }
1921
1922         for (i = 0; i < segments; i++) {
1923                 in6 = inet6_rth_getaddr(extbuf, i);
1924                 if (in6 == NULL)
1925                         printf("   [%d]<NULL>\n", i);
1926                 else {
1927                         if (!inet_ntop(AF_INET6, in6, ntopbuf,
1928                             sizeof(ntopbuf)))
1929                                 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1930                         printf("   [%d]%s\n", i, ntopbuf);
1931                 }
1932         }
1933
1934         return;
1935
1936 }
1937
1938 #else  /* !USE_RFC2292BIS */
1939 /* ARGSUSED */
1940 void
1941 pr_rthdr(void *extbuf, size_t bufsize __unused)
1942 {
1943         putchar('\n');
1944         return;
1945 }
1946 #endif /* USE_RFC2292BIS */
1947
1948 int
1949 pr_bitrange(u_int32_t v, int soff, int ii)
1950 {
1951         int off;
1952         int i;
1953
1954         off = 0;
1955         while (off < 32) {
1956                 /* shift till we have 0x01 */
1957                 if ((v & 0x01) == 0) {
1958                         if (ii > 1)
1959                                 printf("-%u", soff + off - 1);
1960                         ii = 0;
1961                         switch (v & 0x0f) {
1962                         case 0x00:
1963                                 v >>= 4;
1964                                 off += 4;
1965                                 continue;
1966                         case 0x08:
1967                                 v >>= 3;
1968                                 off += 3;
1969                                 continue;
1970                         case 0x04: case 0x0c:
1971                                 v >>= 2;
1972                                 off += 2;
1973                                 continue;
1974                         default:
1975                                 v >>= 1;
1976                                 off += 1;
1977                                 continue;
1978                         }
1979                 }
1980
1981                 /* we have 0x01 with us */
1982                 for (i = 0; i < 32 - off; i++) {
1983                         if ((v & (0x01 << i)) == 0)
1984                                 break;
1985                 }
1986                 if (!ii)
1987                         printf(" %u", soff + off);
1988                 ii += i;
1989                 v >>= i; off += i;
1990         }
1991         return ii;
1992 }
1993
1994 void
1995 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1996         /* ni->qtype must be SUPTYPES */
1997 {
1998         size_t clen;
1999         u_int32_t v;
2000         const u_char *cp, *end;
2001         u_int16_t cur;
2002         struct cbit {
2003                 u_int16_t words;        /*32bit count*/
2004                 u_int16_t skip;
2005         } cbit;
2006 #define MAXQTYPES       (1 << 16)
2007         size_t off;
2008         int b;
2009
2010         cp = (u_char *)(ni + 1);
2011         end = ((u_char *)ni) + nilen;
2012         cur = 0;
2013         b = 0;
2014
2015         printf("NodeInfo Supported Qtypes");
2016         if (options & F_VERBOSE) {
2017                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
2018                         printf(", compressed bitmap");
2019                 else
2020                         printf(", raw bitmap");
2021         }
2022
2023         while (cp < end) {
2024                 clen = (size_t)(end - cp);
2025                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
2026                         if (clen == 0 || clen > MAXQTYPES / 8 ||
2027                             clen % sizeof(v)) {
2028                                 printf("???");
2029                                 return;
2030                         }
2031                 } else {
2032                         if (clen < sizeof(cbit) || clen % sizeof(v))
2033                                 return;
2034                         memcpy(&cbit, cp, sizeof(cbit));
2035                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2036                             clen)
2037                                 return;
2038                         cp += sizeof(cbit);
2039                         clen = ntohs(cbit.words) * sizeof(v);
2040                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
2041                             MAXQTYPES)
2042                                 return;
2043                 }
2044
2045                 for (off = 0; off < clen; off += sizeof(v)) {
2046                         memcpy(&v, cp + off, sizeof(v));
2047                         v = (u_int32_t)ntohl(v);
2048                         b = pr_bitrange(v, (int)(cur + off * 8), b);
2049                 }
2050                 /* flush the remaining bits */
2051                 b = pr_bitrange(0, (int)(cur + off * 8), b);
2052
2053                 cp += clen;
2054                 cur += clen * 8;
2055                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2056                         cur += ntohs(cbit.skip) * 32;
2057         }
2058 }
2059
2060 void
2061 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
2062         /* ni->qtype must be NODEADDR */
2063 {
2064         u_char *cp = (u_char *)(ni + 1);
2065         char ntop_buf[INET6_ADDRSTRLEN];
2066         int withttl = 0;
2067
2068         nilen -= sizeof(struct icmp6_nodeinfo);
2069
2070         if (options & F_VERBOSE) {
2071                 switch (ni->ni_code) {
2072                 case ICMP6_NI_REFUSED:
2073                         (void)printf("refused");
2074                         break;
2075                 case ICMP6_NI_UNKNOWN:
2076                         (void)printf("unknown qtype");
2077                         break;
2078                 }
2079                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2080                         (void)printf(" truncated");
2081         }
2082         putchar('\n');
2083         if (nilen <= 0)
2084                 printf("  no address\n");
2085
2086         /*
2087          * In icmp-name-lookups 05 and later, TTL of each returned address
2088          * is contained in the resposne. We try to detect the version
2089          * by the length of the data, but note that the detection algorithm
2090          * is incomplete. We assume the latest draft by default.
2091          */
2092         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
2093                 withttl = 1;
2094         while (nilen > 0) {
2095                 u_int32_t ttl;
2096
2097                 if (withttl) {
2098                         /* XXX: alignment? */
2099                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
2100                         cp += sizeof(u_int32_t);
2101                         nilen -= sizeof(u_int32_t);
2102                 }
2103
2104                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2105                     NULL)
2106                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2107                 printf("  %s", ntop_buf);
2108                 if (withttl) {
2109                         if (ttl == 0xffffffff) {
2110                                 /*
2111                                  * XXX: can this convention be applied to all
2112                                  * type of TTL (i.e. non-ND TTL)?
2113                                  */
2114                                 printf("(TTL=infty)");
2115                         }
2116                         else
2117                                 printf("(TTL=%u)", ttl);
2118                 }
2119                 putchar('\n');
2120
2121                 nilen -= sizeof(struct in6_addr);
2122                 cp += sizeof(struct in6_addr);
2123         }
2124 }
2125
2126 int
2127 get_hoplim(struct msghdr *mhdr)
2128 {
2129         struct cmsghdr *cm;
2130
2131         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2132              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2133                 if (cm->cmsg_len == 0)
2134                         return(-1);
2135
2136                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2137                     cm->cmsg_type == IPV6_HOPLIMIT &&
2138                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
2139                         return(*(int *)CMSG_DATA(cm));
2140         }
2141
2142         return(-1);
2143 }
2144
2145 struct in6_pktinfo *
2146 get_rcvpktinfo(struct msghdr *mhdr)
2147 {
2148         struct cmsghdr *cm;
2149
2150         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2151              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2152                 if (cm->cmsg_len == 0)
2153                         return(NULL);
2154
2155                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2156                     cm->cmsg_type == IPV6_PKTINFO &&
2157                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2158                         return((struct in6_pktinfo *)CMSG_DATA(cm));
2159         }
2160
2161         return(NULL);
2162 }
2163
2164 int
2165 get_pathmtu(struct msghdr *mhdr)
2166 {
2167 #ifdef IPV6_RECVPATHMTU
2168         struct cmsghdr *cm;
2169         struct ip6_mtuinfo *mtuctl = NULL;
2170
2171         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2172              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2173                 if (cm->cmsg_len == 0)
2174                         return(0);
2175
2176                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2177                     cm->cmsg_type == IPV6_PATHMTU &&
2178                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2179                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2180
2181                         /*
2182                          * If the notified destination is different from
2183                          * the one we are pinging, just ignore the info.
2184                          * We check the scope ID only when both notified value
2185                          * and our own value have non-0 values, because we may
2186                          * have used the default scope zone ID for sending,
2187                          * in which case the scope ID value is 0.
2188                          */
2189                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2190                                                 &dst.sin6_addr) ||
2191                             (mtuctl->ip6m_addr.sin6_scope_id &&
2192                              dst.sin6_scope_id &&
2193                              mtuctl->ip6m_addr.sin6_scope_id !=
2194                              dst.sin6_scope_id)) {
2195                                 if ((options & F_VERBOSE) != 0) {
2196                                         printf("path MTU for %s is notified. "
2197                                                "(ignored)\n",
2198                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2199                                            sizeof(mtuctl->ip6m_addr)));
2200                                 }
2201                                 return(0);
2202                         }
2203
2204                         /*
2205                          * Ignore an invalid MTU. XXX: can we just believe
2206                          * the kernel check?
2207                          */
2208                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2209                                 return(0);
2210
2211                         /* notification for our destination. return the MTU. */
2212                         return((int)mtuctl->ip6m_mtu);
2213                 }
2214         }
2215 #endif
2216         return(0);
2217 }
2218
2219 /*
2220  * tvsub --
2221  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2222  * be >= in.
2223  */
2224 void
2225 tvsub(struct timeval *out, struct timeval *in)
2226 {
2227         if ((out->tv_usec -= in->tv_usec) < 0) {
2228                 --out->tv_sec;
2229                 out->tv_usec += 1000000;
2230         }
2231         out->tv_sec -= in->tv_sec;
2232 }
2233
2234 /*
2235  * onint --
2236  *      SIGINT handler.
2237  */
2238 /* ARGSUSED */
2239 void
2240 onint(int notused __unused)
2241 {
2242         summary();
2243
2244         if (res != NULL)
2245                 freeaddrinfo(res);
2246
2247         if(packet != NULL)
2248                 free(packet);
2249
2250 #ifndef HAVE_POLL_H
2251         if(fdmaskp != NULL)
2252                 free(fdmaskp);
2253 #endif
2254
2255         (void)signal(SIGINT, SIG_DFL);
2256         (void)kill(getpid(), SIGINT);
2257
2258         /* NOTREACHED */
2259         exit(1);
2260 }
2261
2262 /*
2263  * summary --
2264  *      Print out statistics.
2265  */
2266 void
2267 summary(void)
2268 {
2269
2270         (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2271         (void)printf("%ld packets transmitted, ", ntransmitted);
2272         (void)printf("%ld packets received, ", nreceived);
2273         if (nrepeats)
2274                 (void)printf("+%ld duplicates, ", nrepeats);
2275         if (ntransmitted) {
2276                 if (nreceived > ntransmitted)
2277                         (void)printf("-- somebody's duplicating packets!");
2278                 else
2279                         (void)printf("%.1f%% packet loss",
2280                             ((((double)ntransmitted - nreceived) * 100.0) /
2281                             ntransmitted));
2282         }
2283         (void)putchar('\n');
2284         if (nreceived && timing) {
2285                 /* Only display average to microseconds */
2286                 double num = nreceived + nrepeats;
2287                 double avg = tsum / num;
2288                 double dev = sqrt(tsumsq / num - avg * avg);
2289                 (void)printf(
2290                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2291                     tmin, avg, tmax, dev);
2292                 (void)fflush(stdout);
2293         }
2294         (void)fflush(stdout);
2295 }
2296
2297 /*subject type*/
2298 static const char *niqcode[] = {
2299         "IPv6 address",
2300         "DNS label",    /*or empty*/
2301         "IPv4 address",
2302 };
2303
2304 /*result code*/
2305 static const char *nircode[] = {
2306         "Success", "Refused", "Unknown",
2307 };
2308
2309
2310 /*
2311  * pr_icmph --
2312  *      Print a descriptive string about an ICMP header.
2313  */
2314 void
2315 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2316 {
2317         char ntop_buf[INET6_ADDRSTRLEN];
2318         struct nd_redirect *red;
2319         struct icmp6_nodeinfo *ni;
2320         char dnsname[MAXDNAME + 1];
2321         const u_char *cp;
2322         size_t l;
2323
2324         switch (icp->icmp6_type) {
2325         case ICMP6_DST_UNREACH:
2326                 switch (icp->icmp6_code) {
2327                 case ICMP6_DST_UNREACH_NOROUTE:
2328                         (void)printf("No Route to Destination\n");
2329                         break;
2330                 case ICMP6_DST_UNREACH_ADMIN:
2331                         (void)printf("Destination Administratively "
2332                             "Unreachable\n");
2333                         break;
2334                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2335                         (void)printf("Destination Unreachable Beyond Scope\n");
2336                         break;
2337                 case ICMP6_DST_UNREACH_ADDR:
2338                         (void)printf("Destination Host Unreachable\n");
2339                         break;
2340                 case ICMP6_DST_UNREACH_NOPORT:
2341                         (void)printf("Destination Port Unreachable\n");
2342                         break;
2343                 default:
2344                         (void)printf("Destination Unreachable, Bad Code: %d\n",
2345                             icp->icmp6_code);
2346                         break;
2347                 }
2348                 /* Print returned IP header information */
2349                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2350                 break;
2351         case ICMP6_PACKET_TOO_BIG:
2352                 (void)printf("Packet too big mtu = %d\n",
2353                     (int)ntohl(icp->icmp6_mtu));
2354                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2355                 break;
2356         case ICMP6_TIME_EXCEEDED:
2357                 switch (icp->icmp6_code) {
2358                 case ICMP6_TIME_EXCEED_TRANSIT:
2359                         (void)printf("Time to live exceeded\n");
2360                         break;
2361                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2362                         (void)printf("Frag reassembly time exceeded\n");
2363                         break;
2364                 default:
2365                         (void)printf("Time exceeded, Bad Code: %d\n",
2366                             icp->icmp6_code);
2367                         break;
2368                 }
2369                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2370                 break;
2371         case ICMP6_PARAM_PROB:
2372                 (void)printf("Parameter problem: ");
2373                 switch (icp->icmp6_code) {
2374                 case ICMP6_PARAMPROB_HEADER:
2375                         (void)printf("Erroneous Header ");
2376                         break;
2377                 case ICMP6_PARAMPROB_NEXTHEADER:
2378                         (void)printf("Unknown Nextheader ");
2379                         break;
2380                 case ICMP6_PARAMPROB_OPTION:
2381                         (void)printf("Unrecognized Option ");
2382                         break;
2383                 default:
2384                         (void)printf("Bad code(%d) ", icp->icmp6_code);
2385                         break;
2386                 }
2387                 (void)printf("pointer = 0x%02x\n",
2388                     (u_int32_t)ntohl(icp->icmp6_pptr));
2389                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2390                 break;
2391         case ICMP6_ECHO_REQUEST:
2392                 (void)printf("Echo Request");
2393                 /* XXX ID + Seq + Data */
2394                 break;
2395         case ICMP6_ECHO_REPLY:
2396                 (void)printf("Echo Reply");
2397                 /* XXX ID + Seq + Data */
2398                 break;
2399         case ICMP6_MEMBERSHIP_QUERY:
2400                 (void)printf("Listener Query");
2401                 break;
2402         case ICMP6_MEMBERSHIP_REPORT:
2403                 (void)printf("Listener Report");
2404                 break;
2405         case ICMP6_MEMBERSHIP_REDUCTION:
2406                 (void)printf("Listener Done");
2407                 break;
2408         case ND_ROUTER_SOLICIT:
2409                 (void)printf("Router Solicitation");
2410                 break;
2411         case ND_ROUTER_ADVERT:
2412                 (void)printf("Router Advertisement");
2413                 break;
2414         case ND_NEIGHBOR_SOLICIT:
2415                 (void)printf("Neighbor Solicitation");
2416                 break;
2417         case ND_NEIGHBOR_ADVERT:
2418                 (void)printf("Neighbor Advertisement");
2419                 break;
2420         case ND_REDIRECT:
2421                 red = (struct nd_redirect *)icp;
2422                 (void)printf("Redirect\n");
2423                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2424                     sizeof(ntop_buf)))
2425                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2426                 (void)printf("Destination: %s", ntop_buf);
2427                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2428                     sizeof(ntop_buf)))
2429                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2430                 (void)printf(" New Target: %s", ntop_buf);
2431                 break;
2432         case ICMP6_NI_QUERY:
2433                 (void)printf("Node Information Query");
2434                 /* XXX ID + Seq + Data */
2435                 ni = (struct icmp6_nodeinfo *)icp;
2436                 l = end - (u_char *)(ni + 1);
2437                 printf(", ");
2438                 switch (ntohs(ni->ni_qtype)) {
2439                 case NI_QTYPE_NOOP:
2440                         (void)printf("NOOP");
2441                         break;
2442                 case NI_QTYPE_SUPTYPES:
2443                         (void)printf("Supported qtypes");
2444                         break;
2445                 case NI_QTYPE_FQDN:
2446                         (void)printf("DNS name");
2447                         break;
2448                 case NI_QTYPE_NODEADDR:
2449                         (void)printf("nodeaddr");
2450                         break;
2451                 case NI_QTYPE_IPV4ADDR:
2452                         (void)printf("IPv4 nodeaddr");
2453                         break;
2454                 default:
2455                         (void)printf("unknown qtype");
2456                         break;
2457                 }
2458                 if (options & F_VERBOSE) {
2459                         switch (ni->ni_code) {
2460                         case ICMP6_NI_SUBJ_IPV6:
2461                                 if (l == sizeof(struct in6_addr) &&
2462                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2463                                     sizeof(ntop_buf)) != NULL) {
2464                                         (void)printf(", subject=%s(%s)",
2465                                             niqcode[ni->ni_code], ntop_buf);
2466                                 } else {
2467 #if 1
2468                                         /* backward compat to -W */
2469                                         (void)printf(", oldfqdn");
2470 #else
2471                                         (void)printf(", invalid");
2472 #endif
2473                                 }
2474                                 break;
2475                         case ICMP6_NI_SUBJ_FQDN:
2476                                 if (end == (u_char *)(ni + 1)) {
2477                                         (void)printf(", no subject");
2478                                         break;
2479                                 }
2480                                 printf(", subject=%s", niqcode[ni->ni_code]);
2481                                 cp = (const u_char *)(ni + 1);
2482                                 if (dnsdecode(&cp, end, NULL, dnsname,
2483                                     sizeof(dnsname)) != NULL)
2484                                         printf("(%s)", dnsname);
2485                                 else
2486                                         printf("(invalid)");
2487                                 break;
2488                         case ICMP6_NI_SUBJ_IPV4:
2489                                 if (l == sizeof(struct in_addr) &&
2490                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2491                                     sizeof(ntop_buf)) != NULL) {
2492                                         (void)printf(", subject=%s(%s)",
2493                                             niqcode[ni->ni_code], ntop_buf);
2494                                 } else
2495                                         (void)printf(", invalid");
2496                                 break;
2497                         default:
2498                                 (void)printf(", invalid");
2499                                 break;
2500                         }
2501                 }
2502                 break;
2503         case ICMP6_NI_REPLY:
2504                 (void)printf("Node Information Reply");
2505                 /* XXX ID + Seq + Data */
2506                 ni = (struct icmp6_nodeinfo *)icp;
2507                 printf(", ");
2508                 switch (ntohs(ni->ni_qtype)) {
2509                 case NI_QTYPE_NOOP:
2510                         (void)printf("NOOP");
2511                         break;
2512                 case NI_QTYPE_SUPTYPES:
2513                         (void)printf("Supported qtypes");
2514                         break;
2515                 case NI_QTYPE_FQDN:
2516                         (void)printf("DNS name");
2517                         break;
2518                 case NI_QTYPE_NODEADDR:
2519                         (void)printf("nodeaddr");
2520                         break;
2521                 case NI_QTYPE_IPV4ADDR:
2522                         (void)printf("IPv4 nodeaddr");
2523                         break;
2524                 default:
2525                         (void)printf("unknown qtype");
2526                         break;
2527                 }
2528                 if (options & F_VERBOSE) {
2529                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2530                                 printf(", invalid");
2531                         else
2532                                 printf(", %s", nircode[ni->ni_code]);
2533                 }
2534                 break;
2535         default:
2536                 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2537         }
2538 }
2539
2540 /*
2541  * pr_iph --
2542  *      Print an IP6 header.
2543  */
2544 void
2545 pr_iph(struct ip6_hdr *ip6)
2546 {
2547         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2548         u_int8_t tc;
2549         char ntop_buf[INET6_ADDRSTRLEN];
2550
2551         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2552         tc = (tc >> 4) & 0x0f;
2553         tc |= (ip6->ip6_vfc << 4);
2554
2555         printf("Vr TC  Flow Plen Nxt Hlim\n");
2556         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2557             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2558             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2559         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2560                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2561         printf("%s->", ntop_buf);
2562         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2563                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2564         printf("%s\n", ntop_buf);
2565 }
2566
2567 /*
2568  * pr_addr --
2569  *      Return an ascii host address as a dotted quad and optionally with
2570  * a hostname.
2571  */
2572 const char *
2573 pr_addr(struct sockaddr *addr, int addrlen)
2574 {
2575         static char buf[NI_MAXHOST];
2576         int flag = 0;
2577
2578         if ((options & F_HOSTNAME) == 0)
2579                 flag |= NI_NUMERICHOST;
2580
2581         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2582                 return (buf);
2583         else
2584                 return "?";
2585 }
2586
2587 /*
2588  * pr_retip --
2589  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2590  */
2591 void
2592 pr_retip(struct ip6_hdr *ip6, u_char *end)
2593 {
2594         u_char *cp = (u_char *)ip6, nh;
2595         int hlen;
2596
2597         if (end - (u_char *)ip6 < sizeof(*ip6)) {
2598                 printf("IP6");
2599                 goto trunc;
2600         }
2601         pr_iph(ip6);
2602         hlen = sizeof(*ip6);
2603
2604         nh = ip6->ip6_nxt;
2605         cp += hlen;
2606         while (end - cp >= 8) {
2607                 switch (nh) {
2608                 case IPPROTO_HOPOPTS:
2609                         printf("HBH ");
2610                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2611                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2612                         break;
2613                 case IPPROTO_DSTOPTS:
2614                         printf("DSTOPT ");
2615                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2616                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2617                         break;
2618                 case IPPROTO_FRAGMENT:
2619                         printf("FRAG ");
2620                         hlen = sizeof(struct ip6_frag);
2621                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2622                         break;
2623                 case IPPROTO_ROUTING:
2624                         printf("RTHDR ");
2625                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2626                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2627                         break;
2628 #ifdef IPSEC
2629                 case IPPROTO_AH:
2630                         printf("AH ");
2631                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2632                         nh = ((struct ah *)cp)->ah_nxt;
2633                         break;
2634 #endif
2635                 case IPPROTO_ICMPV6:
2636                         printf("ICMP6: type = %d, code = %d\n",
2637                             *cp, *(cp + 1));
2638                         return;
2639                 case IPPROTO_ESP:
2640                         printf("ESP\n");
2641                         return;
2642                 case IPPROTO_TCP:
2643                         printf("TCP: from port %u, to port %u (decimal)\n",
2644                             (*cp * 256 + *(cp + 1)),
2645                             (*(cp + 2) * 256 + *(cp + 3)));
2646                         return;
2647                 case IPPROTO_UDP:
2648                         printf("UDP: from port %u, to port %u (decimal)\n",
2649                             (*cp * 256 + *(cp + 1)),
2650                             (*(cp + 2) * 256 + *(cp + 3)));
2651                         return;
2652                 default:
2653                         printf("Unknown Header(%d)\n", nh);
2654                         return;
2655                 }
2656
2657                 if ((cp += hlen) >= end)
2658                         goto trunc;
2659         }
2660         if (end - cp < 8)
2661                 goto trunc;
2662
2663         putchar('\n');
2664         return;
2665
2666   trunc:
2667         printf("...\n");
2668         return;
2669 }
2670
2671 void
2672 fill(char *bp, char *patp)
2673 {
2674         int ii, jj, kk;
2675         int pat[16];
2676         char *cp;
2677
2678         for (cp = patp; *cp; cp++)
2679                 if (!isxdigit(*cp))
2680                         errx(1, "patterns must be specified as hex digits");
2681         ii = sscanf(patp,
2682             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2683             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2684             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2685             &pat[13], &pat[14], &pat[15]);
2686
2687 /* xxx */
2688         if (ii > 0)
2689                 for (kk = 0;
2690                     kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii);
2691                     kk += ii)
2692                         for (jj = 0; jj < ii; ++jj)
2693                                 bp[jj + kk] = pat[jj];
2694         if (!(options & F_QUIET)) {
2695                 (void)printf("PATTERN: 0x");
2696                 for (jj = 0; jj < ii; ++jj)
2697                         (void)printf("%02x", bp[jj] & 0xFF);
2698                 (void)printf("\n");
2699         }
2700 }
2701
2702 #ifdef IPSEC
2703 #ifdef IPSEC_POLICY_IPSEC
2704 int
2705 setpolicy(int so __unused, char *policy)
2706 {
2707         char *buf;
2708
2709         if (policy == NULL)
2710                 return 0;       /* ignore */
2711
2712         buf = ipsec_set_policy(policy, strlen(policy));
2713         if (buf == NULL)
2714                 errx(1, "%s", ipsec_strerror());
2715         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2716             ipsec_get_policylen(buf)) < 0)
2717                 warnx("Unable to set IPsec policy");
2718         free(buf);
2719
2720         return 0;
2721 }
2722 #endif
2723 #endif
2724
2725 char *
2726 nigroup(char *name, int nig_oldmcprefix)
2727 {
2728         char *p;
2729         char *q;
2730         MD5_CTX ctxt;
2731         u_int8_t digest[16];
2732         u_int8_t c;
2733         size_t l;
2734         char hbuf[NI_MAXHOST];
2735         struct in6_addr in6;
2736         int valid;
2737
2738         p = strchr(name, '.');
2739         if (!p)
2740                 p = name + strlen(name);
2741         l = p - name;
2742         if (l > 63 || l > sizeof(hbuf) - 1)
2743                 return NULL;    /*label too long*/
2744         strncpy(hbuf, name, l);
2745         hbuf[(int)l] = '\0';
2746
2747         for (q = name; *q; q++) {
2748                 if (isupper(*(unsigned char *)q))
2749                         *q = tolower(*(unsigned char *)q);
2750         }
2751
2752         /* generate 16 bytes of pseudo-random value. */
2753         memset(&ctxt, 0, sizeof(ctxt));
2754         MD5Init(&ctxt);
2755         c = l & 0xff;
2756         MD5Update(&ctxt, &c, sizeof(c));
2757         MD5Update(&ctxt, (unsigned char *)name, l);
2758         MD5Final(digest, &ctxt);
2759
2760         if (nig_oldmcprefix) {
2761                 /* draft-ietf-ipngwg-icmp-name-lookup */
2762                 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
2763         } else {
2764                 /* RFC 4620 */
2765                 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
2766         }
2767         if (valid != 1)
2768                 return NULL;    /*XXX*/
2769
2770         if (nig_oldmcprefix) {
2771                 /* draft-ietf-ipngwg-icmp-name-lookup */
2772                 bcopy(digest, &in6.s6_addr[12], 4);
2773         } else {
2774                 /* RFC 4620 */
2775                 bcopy(digest, &in6.s6_addr[13], 3);
2776         }
2777
2778         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2779                 return NULL;
2780
2781         return strdup(hbuf);
2782 }
2783
2784 void
2785 usage(void)
2786 {
2787         (void)fprintf(stderr,
2788 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2789             "A"
2790 #endif
2791             "usage: ping6 [-"
2792             "Dd"
2793 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2794             "E"
2795 #endif
2796             "fH"
2797 #ifdef IPV6_USE_MIN_MTU
2798             "m"
2799 #endif
2800             "nNoqrRtvwW] "
2801             "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2802             "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2803 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2804             " [-P policy]"
2805 #endif
2806             "\n"
2807             "             [-p pattern] [-S sourceaddr] [-s packetsize] "
2808             "[hops ...] host\n");
2809         exit(1);
2810 }