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 <sysexits.h>
 129 #include <unistd.h>
 130
 131 #ifdef IPSEC
 132 #include <netipsec/ah.h>
 133 #include <netipsec/ipsec.h>
 134 #endif
 135
 136 #include <md5.h>
 137
 138 struct tv32 {
 139         u_int32_t tv32_sec;
 140         u_int32_t tv32_usec;
 141 };
 142
 143 #define MAXPACKETLEN    131072
 144 #define IP6LEN          40
 145 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 146 #define ICMP6ECHOTMLEN sizeof(struct tv32)
 147 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 148 # define CONTROLLEN     10240   /* ancillary data buffer size RFC3542 20.1 */
 149 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 150 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 151 #define EXTRA           256     /* for AH and various other headers. weird. */
 152 #define DEFDATALEN      ICMP6ECHOTMLEN
 153 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 154 #define NROUTES         9               /* number of record route slots */
 155 #define MAXWAIT         10000           /* max ms to wait for response */
 156 #define MAXALARM        (60 * 60)       /* max seconds for alarm timeout */
 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 #define F_WAITTIME      0x2000000
 194 u_int options;
 195
 196 #define IN6LEN          sizeof(struct in6_addr)
 197 #define SA6LEN          sizeof(struct sockaddr_in6)
 198 #define DUMMY_PORT      10101
 199
 200 #define SIN6(s) ((struct sockaddr_in6 *)(s))
 201
 202 /*
 203  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 204  * number of received sequence numbers we can keep track of.  Change 128
 205  * to 8192 for complete accuracy...
 206  */
 207 #define MAX_DUP_CHK     (8 * 8192)
 208 int mx_dup_ck = MAX_DUP_CHK;
 209 char rcvd_tbl[MAX_DUP_CHK / 8];
 210
 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
 227 /* counters */
 228 long nmissedmax;                /* max value of ntransmitted - nreceived - 1 */
 229 long npackets;                  /* max packets to transmit */
 230 long nreceived;                 /* # of packets we got back */
 231 long nrepeats;                  /* number of duplicates */
 232 long ntransmitted;              /* sequence # for outbound packets = #sent */
 233 int interval = 1000;            /* interval between packets in ms */
 234 int waittime = MAXWAIT;         /* timeout for each packet */
 235 long nrcvtimeout = 0;           /* # of packets we got back after waittime */
 236
 237 /* timing */
 238 int timing;                     /* flag to do timing */
 239 double tmin = 999999999.0;      /* minimum round trip time */
 240 double tmax = 0.0;              /* maximum round trip time */
 241 double tsum = 0.0;              /* sum of all times, for doing average */
 242 double tsumsq = 0.0;            /* sum of all times squared, for std. dev. */
 243
 244 /* for node addresses */
 245 u_short naflags;
 246
 247 /* for ancillary data(advanced API) */
 248 struct msghdr smsghdr;
 249 struct iovec smsgiov;
 250 char *scmsg = 0;
 251
 252 volatile sig_atomic_t seenint;
 253 #ifdef SIGINFO
 254 volatile sig_atomic_t seeninfo;
 255 #endif
 256
 257 int      main(int, char *[]);
 258 void     fill(char *, char *);
 259 int      get_hoplim(struct msghdr *);
 260 int      get_pathmtu(struct msghdr *);
 261 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
 262 void     onsignal(int);
 263 void     onint(int);
 264 size_t   pingerlen(void);
 265 int      pinger(void);
 266 const char *pr_addr(struct sockaddr *, int);
 267 void     pr_icmph(struct icmp6_hdr *, u_char *);
 268 void     pr_iph(struct ip6_hdr *);
 269 void     pr_suptypes(struct icmp6_nodeinfo *, size_t);
 270 void     pr_nodeaddr(struct icmp6_nodeinfo *, int);
 271 int      myechoreply(const struct icmp6_hdr *);
 272 int      mynireply(const struct icmp6_nodeinfo *);
 273 char *dnsdecode(const u_char **, const u_char *, const u_char *,
 274         char *, size_t);
 275 void     pr_pack(u_char *, int, struct msghdr *);
 276 void     pr_exthdrs(struct msghdr *);
 277 void     pr_ip6opt(void *, size_t);
 278 void     pr_rthdr(void *, size_t);
 279 int      pr_bitrange(u_int32_t, int, int);
 280 void     pr_retip(struct ip6_hdr *, u_char *);
 281 void     summary(void);
 282 void     tvsub(struct timeval *, struct timeval *);
 283 int      setpolicy(int, char *);
 284 char    *nigroup(char *, int);
 285 void     usage(void);
 286
 287 int
 288 main(int argc, char *argv[])
 289 {
 290         struct timeval last, intvl;
 291         struct sockaddr_in6 from, *sin6;
 292 #ifndef HAVE_ARC4RANDOM
 293         struct timeval seed;
 294 #endif
 295         struct addrinfo hints, *res;
 296         struct sigaction si_sa;
 297         int cc, i;
 298         int almost_done, ch, hold, packlen, preload, optval, error;
 299         int nig_oldmcprefix = -1;
 300         u_char *datap;
 301         char *e, *target, *ifname = NULL, *gateway = NULL;
 302         int ip6optlen = 0;
 303         struct cmsghdr *scmsgp = NULL;
 304         /* For control (ancillary) data received from recvmsg() */
 305         struct cmsghdr cm[CONTROLLEN];
 306 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 307         u_long lsockbufsize;
 308         int sockbufsize = 0;
 309 #endif
 310         int usepktinfo = 0;
 311         struct in6_pktinfo *pktinfo = NULL;
 312 #ifdef USE_RFC2292BIS
 313         struct ip6_rthdr *rthdr = NULL;
 314 #endif
 315 #ifdef IPSEC_POLICY_IPSEC
 316         char *policy_in = NULL;
 317         char *policy_out = NULL;
 318 #endif
 319         double t;
 320         u_long alarmtimeout;
 321         size_t rthlen;
 322 #ifdef IPV6_USE_MIN_MTU
 323         int mflag = 0;
 324 #endif
 325
 326         /* just to be sure */
 327         memset(&smsghdr, 0, sizeof(smsghdr));
 328         memset(&smsgiov, 0, sizeof(smsgiov));
 329
 330         alarmtimeout = preload = 0;
 331         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 332 #ifndef IPSEC
 333 #define ADDOPTS
 334 #else
 335 #ifdef IPSEC_POLICY_IPSEC
 336 #define ADDOPTS "P:"
 337 #else
 338 #define ADDOPTS "AE"
 339 #endif /*IPSEC_POLICY_IPSEC*/
 340 #endif
 341         while ((ch = getopt(argc, argv,
 342             "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) {
 343 #undef ADDOPTS
 344                 switch (ch) {
 345                 case 'a':
 346                 {
 347                         char *cp;
 348
 349                         options &= ~F_NOUSERDATA;
 350                         options |= F_NODEADDR;
 351                         for (cp = optarg; *cp != '\0'; cp++) {
 352                                 switch (*cp) {
 353                                 case 'a':
 354                                         naflags |= NI_NODEADDR_FLAG_ALL;
 355                                         break;
 356                                 case 'c':
 357                                 case 'C':
 358                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 359                                         break;
 360                                 case 'l':
 361                                 case 'L':
 362                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 363                                         break;
 364                                 case 's':
 365                                 case 'S':
 366                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 367                                         break;
 368                                 case 'g':
 369                                 case 'G':
 370                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 371                                         break;
 372                                 case 'A': /* experimental. not in the spec */
 373 #ifdef NI_NODEADDR_FLAG_ANYCAST
 374                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 375                                         break;
 376 #else
 377                                         errx(1,
 378 "-a A is not supported on the platform");
 379                                         /*NOTREACHED*/
 380 #endif
 381                                 default:
 382                                         usage();
 383                                         /*NOTREACHED*/
 384                                 }
 385                         }
 386                         break;
 387                 }
 388                 case 'b':
 389 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 390                         errno = 0;
 391                         e = NULL;
 392                         lsockbufsize = strtoul(optarg, &e, 10);
 393                         sockbufsize = lsockbufsize;
 394                         if (errno || !*optarg || *e ||
 395                             sockbufsize != lsockbufsize)
 396                                 errx(1, "invalid socket buffer size");
 397 #else
 398                         errx(1,
 399 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 400 #endif
 401                         break;
 402                 case 'c':
 403                         npackets = strtol(optarg, &e, 10);
 404                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 405                                 errx(1,
 406                                     "illegal number of packets -- %s", optarg);
 407                         break;
 408                 case 'D':
 409                         options |= F_DONTFRAG;
 410                         break;
 411                 case 'd':
 412                         options |= F_SO_DEBUG;
 413                         break;
 414                 case 'f':
 415                         if (getuid()) {
 416                                 errno = EPERM;
 417                                 errx(1, "Must be superuser to flood ping");
 418                         }
 419                         options |= F_FLOOD;
 420                         setbuf(stdout, (char *)NULL);
 421                         break;
 422                 case 'g':
 423                         gateway = optarg;
 424                         break;
 425                 case 'H':
 426                         options |= F_HOSTNAME;
 427                         break;
 428                 case 'h':               /* hoplimit */
 429                         hoplimit = strtol(optarg, &e, 10);
 430                         if (*optarg == '\0' || *e != '\0')
 431                                 errx(1, "illegal hoplimit %s", optarg);
 432                         if (255 < hoplimit || hoplimit < -1)
 433                                 errx(1,
 434                                     "illegal hoplimit -- %s", optarg);
 435                         break;
 436                 case 'I':
 437                         ifname = optarg;
 438                         options |= F_INTERFACE;
 439 #ifndef USE_SIN6_SCOPE_ID
 440                         usepktinfo++;
 441 #endif
 442                         break;
 443                 case 'i':               /* wait between sending packets */
 444                         t = strtod(optarg, &e);
 445                         if (*optarg == '\0' || *e != '\0')
 446                                 errx(1, "illegal timing interval %s", optarg);
 447                         if (t < 1 && getuid()) {
 448                                 errx(1, "%s: only root may use interval < 1s",
 449                                     strerror(EPERM));
 450                         }
 451                         intvl.tv_sec = (long)t;
 452                         intvl.tv_usec =
 453                             (long)((t - intvl.tv_sec) * 1000000);
 454                         if (intvl.tv_sec < 0)
 455                                 errx(1, "illegal timing interval %s", optarg);
 456                         /* less than 1/hz does not make sense */
 457                         if (intvl.tv_sec == 0 && intvl.tv_usec < 1) {
 458                                 warnx("too small interval, raised to .000001");
 459                                 intvl.tv_usec = 1;
 460                         }
 461                         options |= F_INTERVAL;
 462                         break;
 463                 case 'l':
 464                         if (getuid()) {
 465                                 errno = EPERM;
 466                                 errx(1, "Must be superuser to preload");
 467                         }
 468                         preload = strtol(optarg, &e, 10);
 469                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 470                                 errx(1, "illegal preload value -- %s", optarg);
 471                         break;
 472                 case 'm':
 473 #ifdef IPV6_USE_MIN_MTU
 474                         mflag++;
 475                         break;
 476 #else
 477                         errx(1, "-%c is not supported on this platform", ch);
 478                         /*NOTREACHED*/
 479 #endif
 480                 case 'n':
 481                         options &= ~F_HOSTNAME;
 482                         break;
 483                 case 'N':
 484                         options |= F_NIGROUP;
 485                         nig_oldmcprefix++;
 486                         break;
 487                 case 'o':
 488                         options |= F_ONCE;
 489                         break;
 490                 case 'p':               /* fill buffer with user pattern */
 491                         options |= F_PINGFILLED;
 492                         fill((char *)datap, optarg);
 493                                 break;
 494                 case 'q':
 495                         options |= F_QUIET;
 496                         break;
 497                 case 'r':
 498                         options |= F_AUDIBLE;
 499                         break;
 500                 case 'R':
 501                         options |= F_MISSED;
 502                         break;
 503                 case 'S':
 504                         memset(&hints, 0, sizeof(struct addrinfo));
 505                         hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
 506                         hints.ai_family = AF_INET6;
 507                         hints.ai_socktype = SOCK_RAW;
 508                         hints.ai_protocol = IPPROTO_ICMPV6;
 509
 510                         error = getaddrinfo(optarg, NULL, &hints, &res);
 511                         if (error) {
 512                                 errx(1, "invalid source address: %s",
 513                                      gai_strerror(error));
 514                         }
 515                         /*
 516                          * res->ai_family must be AF_INET6 and res->ai_addrlen
 517                          * must be sizeof(src).
 518                          */
 519                         memcpy(&src, res->ai_addr, res->ai_addrlen);
 520                         srclen = res->ai_addrlen;
 521                         freeaddrinfo(res);
 522                         res = NULL;
 523                         options |= F_SRCADDR;
 524                         break;
 525                 case 's':               /* size of packet to send */
 526                         datalen = strtol(optarg, &e, 10);
 527                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 528                                 errx(1, "illegal datalen value -- %s", optarg);
 529                         if (datalen > MAXDATALEN) {
 530                                 errx(1,
 531                                     "datalen value too large, maximum is %d",
 532                                     MAXDATALEN);
 533                         }
 534                         break;
 535                 case 't':
 536                         options &= ~F_NOUSERDATA;
 537                         options |= F_SUPTYPES;
 538                         break;
 539                 case 'v':
 540                         options |= F_VERBOSE;
 541                         break;
 542                 case 'w':
 543                         options &= ~F_NOUSERDATA;
 544                         options |= F_FQDN;
 545                         break;
 546                 case 'W':
 547                         options &= ~F_NOUSERDATA;
 548                         options |= F_FQDNOLD;
 549                         break;
 550                 case 'x':
 551                         t = strtod(optarg, &e);
 552                         if (*e || e == optarg || t > (double)INT_MAX)
 553                                 err(EX_USAGE, "invalid timing interval: `%s'",
 554                                     optarg);
 555                         options |= F_WAITTIME;
 556                         waittime = (int)t;
 557                         break;
 558                 case 'X':
 559                         alarmtimeout = strtoul(optarg, &e, 0);
 560                         if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
 561                                 errx(EX_USAGE, "invalid timeout: `%s'",
 562                                     optarg);
 563                         if (alarmtimeout > MAXALARM)
 564                                 errx(EX_USAGE, "invalid timeout: `%s' > %d",
 565                                     optarg, MAXALARM);
 566                         alarm((int)alarmtimeout);
 567                         break;
 568 #ifdef IPSEC
 569 #ifdef IPSEC_POLICY_IPSEC
 570                 case 'P':
 571                         options |= F_POLICY;
 572                         if (!strncmp("in", optarg, 2)) {
 573                                 if ((policy_in = strdup(optarg)) == NULL)
 574                                         errx(1, "strdup");
 575                         } else if (!strncmp("out", optarg, 3)) {
 576                                 if ((policy_out = strdup(optarg)) == NULL)
 577                                         errx(1, "strdup");
 578                         } else
 579                                 errx(1, "invalid security policy");
 580                         break;
 581 #else
 582                 case 'A':
 583                         options |= F_AUTHHDR;
 584                         break;
 585                 case 'E':
 586                         options |= F_ENCRYPT;
 587                         break;
 588 #endif /*IPSEC_POLICY_IPSEC*/
 589 #endif /*IPSEC*/
 590                 default:
 591                         usage();
 592                         /*NOTREACHED*/
 593                 }
 594         }
 595
 596         argc -= optind;
 597         argv += optind;
 598
 599         if (argc < 1) {
 600                 usage();
 601                 /*NOTREACHED*/
 602         }
 603
 604         if (argc > 1) {
 605 #ifdef IPV6_RECVRTHDR   /* 2292bis */
 606                 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
 607                     argc - 1));
 608 #else  /* RFC2292 */
 609                 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
 610 #endif
 611                 if (rthlen == 0) {
 612                         errx(1, "too many intermediate hops");
 613                         /*NOTREACHED*/
 614                 }
 615                 ip6optlen += rthlen;
 616         }
 617
 618         if (options & F_NIGROUP) {
 619                 target = nigroup(argv[argc - 1], nig_oldmcprefix);
 620                 if (target == NULL) {
 621                         usage();
 622                         /*NOTREACHED*/
 623                 }
 624         } else
 625                 target = argv[argc - 1];
 626
 627         /* getaddrinfo */
 628         memset(&hints, 0, sizeof(struct addrinfo));
 629         hints.ai_flags = AI_CANONNAME;
 630         hints.ai_family = AF_INET6;
 631         hints.ai_socktype = SOCK_RAW;
 632         hints.ai_protocol = IPPROTO_ICMPV6;
 633
 634         error = getaddrinfo(target, NULL, &hints, &res);
 635         if (error)
 636                 errx(1, "%s", gai_strerror(error));
 637         if (res->ai_canonname)
 638                 hostname = res->ai_canonname;
 639         else
 640                 hostname = target;
 641
 642         if (!res->ai_addr)
 643                 errx(1, "getaddrinfo failed");
 644
 645         (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
 646
 647         if ((s = socket(res->ai_family, res->ai_socktype,
 648             res->ai_protocol)) < 0)
 649                 err(1, "socket");
 650
 651         /* set the source address if specified. */
 652         if ((options & F_SRCADDR) &&
 653             bind(s, (struct sockaddr *)&src, srclen) != 0) {
 654                 err(1, "bind");
 655         }
 656
 657         /* set the gateway (next hop) if specified */
 658         if (gateway) {
 659                 memset(&hints, 0, sizeof(hints));
 660                 hints.ai_family = AF_INET6;
 661                 hints.ai_socktype = SOCK_RAW;
 662                 hints.ai_protocol = IPPROTO_ICMPV6;
 663
 664                 error = getaddrinfo(gateway, NULL, &hints, &res);
 665                 if (error) {
 666                         errx(1, "getaddrinfo for the gateway %s: %s",
 667                              gateway, gai_strerror(error));
 668                 }
 669                 if (res->ai_next && (options & F_VERBOSE))
 670                         warnx("gateway resolves to multiple addresses");
 671
 672                 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
 673                     res->ai_addr, res->ai_addrlen)) {
 674                         err(1, "setsockopt(IPV6_NEXTHOP)");
 675                 }
 676
 677                 freeaddrinfo(res);
 678         }
 679
 680         /*
 681          * let the kerel pass extension headers of incoming packets,
 682          * for privileged socket options
 683          */
 684         if ((options & F_VERBOSE) != 0) {
 685                 int opton = 1;
 686
 687 #ifdef IPV6_RECVHOPOPTS
 688                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 689                     sizeof(opton)))
 690                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 691 #else  /* old adv. API */
 692                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 693                     sizeof(opton)))
 694                         err(1, "setsockopt(IPV6_HOPOPTS)");
 695 #endif
 696 #ifdef IPV6_RECVDSTOPTS
 697                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 698                     sizeof(opton)))
 699                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 700 #else  /* old adv. API */
 701                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 702                     sizeof(opton)))
 703                         err(1, "setsockopt(IPV6_DSTOPTS)");
 704 #endif
 705 #ifdef IPV6_RECVRTHDRDSTOPTS
 706                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 707                     sizeof(opton)))
 708                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 709 #endif
 710         }
 711
 712         /* revoke root privilege */
 713         if (seteuid(getuid()) != 0)
 714                 err(1, "seteuid() failed");
 715         if (setuid(getuid()) != 0)
 716                 err(1, "setuid() failed");
 717
 718         if ((options & F_FLOOD) && (options & F_INTERVAL))
 719                 errx(1, "-f and -i incompatible options");
 720
 721         if ((options & F_NOUSERDATA) == 0) {
 722                 if (datalen >= sizeof(struct tv32)) {
 723                         /* we can time transfer */
 724                         timing = 1;
 725                 } else
 726                         timing = 0;
 727                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 728                 if (options & F_VERBOSE)
 729                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 730                 else
 731                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 732         } else {
 733                 /* suppress timing for node information query */
 734                 timing = 0;
 735                 datalen = 2048;
 736                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 737         }
 738
 739         if (!(packet = (u_char *)malloc((u_int)packlen)))
 740                 err(1, "Unable to allocate packet");
 741         if (!(options & F_PINGFILLED))
 742                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 743                         *datap++ = i;
 744
 745         ident = getpid() & 0xFFFF;
 746 #ifndef HAVE_ARC4RANDOM
 747         gettimeofday(&seed, NULL);
 748         srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident));
 749         memset(nonce, 0, sizeof(nonce));
 750         for (i = 0; i < sizeof(nonce); i += sizeof(int))
 751                 *((int *)&nonce[i]) = rand();
 752 #else
 753         memset(nonce, 0, sizeof(nonce));
 754         for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t))
 755                 *((u_int32_t *)&nonce[i]) = arc4random();
 756 #endif
 757         optval = 1;
 758         if (options & F_DONTFRAG)
 759                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG,
 760                     &optval, sizeof(optval)) == -1)
 761                         err(1, "IPV6_DONTFRAG");
 762         hold = 1;
 763
 764         if (options & F_SO_DEBUG)
 765                 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 766                     sizeof(hold));
 767         optval = IPV6_DEFHLIM;
 768         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 769                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 770                     &optval, sizeof(optval)) == -1)
 771                         err(1, "IPV6_MULTICAST_HOPS");
 772 #ifdef IPV6_USE_MIN_MTU
 773         if (mflag != 1) {
 774                 optval = mflag > 1 ? 0 : 1;
 775
 776                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 777                     &optval, sizeof(optval)) == -1)
 778                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 779         }
 780 #ifdef IPV6_RECVPATHMTU
 781         else {
 782                 optval = 1;
 783                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 784                     &optval, sizeof(optval)) == -1)
 785                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 786         }
 787 #endif /* IPV6_RECVPATHMTU */
 788 #endif /* IPV6_USE_MIN_MTU */
 789
 790 #ifdef IPSEC
 791 #ifdef IPSEC_POLICY_IPSEC
 792         if (options & F_POLICY) {
 793                 if (setpolicy(s, policy_in) < 0)
 794                         errx(1, "%s", ipsec_strerror());
 795                 if (setpolicy(s, policy_out) < 0)
 796                         errx(1, "%s", ipsec_strerror());
 797         }
 798 #else
 799         if (options & F_AUTHHDR) {
 800                 optval = IPSEC_LEVEL_REQUIRE;
 801 #ifdef IPV6_AUTH_TRANS_LEVEL
 802                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 803                     &optval, sizeof(optval)) == -1)
 804                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 805 #else /* old def */
 806                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 807                     &optval, sizeof(optval)) == -1)
 808                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 809 #endif
 810         }
 811         if (options & F_ENCRYPT) {
 812                 optval = IPSEC_LEVEL_REQUIRE;
 813                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 814                     &optval, sizeof(optval)) == -1)
 815                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 816         }
 817 #endif /*IPSEC_POLICY_IPSEC*/
 818 #endif
 819
 820 #ifdef ICMP6_FILTER
 821     {
 822         struct icmp6_filter filt;
 823         if (!(options & F_VERBOSE)) {
 824                 ICMP6_FILTER_SETBLOCKALL(&filt);
 825                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 826                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 827                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 828                 else
 829                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 830         } else {
 831                 ICMP6_FILTER_SETPASSALL(&filt);
 832         }
 833         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 834             sizeof(filt)) < 0)
 835                 err(1, "setsockopt(ICMP6_FILTER)");
 836     }
 837 #endif /*ICMP6_FILTER*/
 838
 839         /* let the kerel pass extension headers of incoming packets */
 840         if ((options & F_VERBOSE) != 0) {
 841                 int opton = 1;
 842
 843 #ifdef IPV6_RECVRTHDR
 844                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 845                     sizeof(opton)))
 846                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 847 #else  /* old adv. API */
 848                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 849                     sizeof(opton)))
 850                         err(1, "setsockopt(IPV6_RTHDR)");
 851 #endif
 852         }
 853
 854 /*
 855         optval = 1;
 856         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 857                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 858                     &optval, sizeof(optval)) == -1)
 859                         err(1, "IPV6_MULTICAST_LOOP");
 860 */
 861
 862         /* Specify the outgoing interface and/or the source address */
 863         if (usepktinfo)
 864                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 865
 866         if (hoplimit != -1)
 867                 ip6optlen += CMSG_SPACE(sizeof(int));
 868
 869         /* set IP6 packet options */
 870         if (ip6optlen) {
 871                 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
 872                         errx(1, "can't allocate enough memory");
 873                 smsghdr.msg_control = (caddr_t)scmsg;
 874                 smsghdr.msg_controllen = ip6optlen;
 875                 scmsgp = (struct cmsghdr *)scmsg;
 876         }
 877         if (usepktinfo) {
 878                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 879                 memset(pktinfo, 0, sizeof(*pktinfo));
 880                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 881                 scmsgp->cmsg_level = IPPROTO_IPV6;
 882                 scmsgp->cmsg_type = IPV6_PKTINFO;
 883                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 884         }
 885
 886         /* set the outgoing interface */
 887         if (ifname) {
 888 #ifndef USE_SIN6_SCOPE_ID
 889                 /* pktinfo must have already been allocated */
 890                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 891                         errx(1, "%s: invalid interface name", ifname);
 892 #else
 893                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 894                         errx(1, "%s: invalid interface name", ifname);
 895 #endif
 896         }
 897         if (hoplimit != -1) {
 898                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 899                 scmsgp->cmsg_level = IPPROTO_IPV6;
 900                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 901                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 902
 903                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 904         }
 905
 906         if (argc > 1) { /* some intermediate addrs are specified */
 907                 int hops;
 908 #ifdef USE_RFC2292BIS
 909                 int rthdrlen;
 910 #endif
 911
 912 #ifdef USE_RFC2292BIS
 913                 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
 914                 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
 915                 scmsgp->cmsg_level = IPPROTO_IPV6;
 916                 scmsgp->cmsg_type = IPV6_RTHDR;
 917                 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
 918                 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
 919                     IPV6_RTHDR_TYPE_0, argc - 1);
 920                 if (rthdr == NULL)
 921                         errx(1, "can't initialize rthdr");
 922 #else  /* old advanced API */
 923                 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
 924                     IPV6_RTHDR_TYPE_0)) == 0)
 925                         errx(1, "can't initialize rthdr");
 926 #endif /* USE_RFC2292BIS */
 927
 928                 for (hops = 0; hops < argc - 1; hops++) {
 929                         memset(&hints, 0, sizeof(hints));
 930                         hints.ai_family = AF_INET6;
 931
 932                         if ((error = getaddrinfo(argv[hops], NULL, &hints,
 933                             &res)))
 934                                 errx(1, "%s", gai_strerror(error));
 935                         if (res->ai_addr->sa_family != AF_INET6)
 936                                 errx(1,
 937                                     "bad addr family of an intermediate addr");
 938                         sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
 939 #ifdef USE_RFC2292BIS
 940                         if (inet6_rth_add(rthdr, &sin6->sin6_addr))
 941                                 errx(1, "can't add an intermediate node");
 942 #else  /* old advanced API */
 943                         if (inet6_rthdr_add(scmsg, &sin6->sin6_addr,
 944                             IPV6_RTHDR_LOOSE))
 945                                 errx(1, "can't add an intermediate node");
 946 #endif /* USE_RFC2292BIS */
 947                         freeaddrinfo(res);
 948                 }
 949
 950 #ifndef USE_RFC2292BIS
 951                 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
 952                         errx(1, "can't set the last flag");
 953 #endif
 954
 955                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 956         }
 957
 958         if (!(options & F_SRCADDR)) {
 959                 /*
 960                  * get the source address. XXX since we revoked the root
 961                  * privilege, we cannot use a raw socket for this.
 962                  */
 963                 int dummy;
 964                 socklen_t len = sizeof(src);
 965
 966                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 967                         err(1, "UDP socket");
 968
 969                 src.sin6_family = AF_INET6;
 970                 src.sin6_addr = dst.sin6_addr;
 971                 src.sin6_port = ntohs(DUMMY_PORT);
 972                 src.sin6_scope_id = dst.sin6_scope_id;
 973
 974 #ifdef USE_RFC2292BIS
 975                 if (pktinfo &&
 976                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 977                     (void *)pktinfo, sizeof(*pktinfo)))
 978                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 979
 980                 if (hoplimit != -1 &&
 981                     setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 982                     (void *)&hoplimit, sizeof(hoplimit)))
 983                         err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
 984
 985                 if (hoplimit != -1 &&
 986                     setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 987                     (void *)&hoplimit, sizeof(hoplimit)))
 988                         err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
 989
 990                 if (rthdr &&
 991                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
 992                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
 993                         err(1, "UDP setsockopt(IPV6_RTHDR)");
 994 #else  /* old advanced API */
 995                 if (smsghdr.msg_control &&
 996                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
 997                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
 998                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
 999 #endif
1000
1001                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
1002                         err(1, "UDP connect");
1003
1004                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
1005                         err(1, "getsockname");
1006
1007                 close(dummy);
1008         }
1009
1010 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
1011         if (sockbufsize) {
1012                 if (datalen > sockbufsize)
1013                         warnx("you need -b to increase socket buffer size");
1014                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
1015                     sizeof(sockbufsize)) < 0)
1016                         err(1, "setsockopt(SO_SNDBUF)");
1017                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
1018                     sizeof(sockbufsize)) < 0)
1019                         err(1, "setsockopt(SO_RCVBUF)");
1020         }
1021         else {
1022                 if (datalen > 8 * 1024) /*XXX*/
1023                         warnx("you need -b to increase socket buffer size");
1024                 /*
1025                  * When pinging the broadcast address, you can get a lot of
1026                  * answers. Doing something so evil is useful if you are trying
1027                  * to stress the ethernet, or just want to fill the arp cache
1028                  * to get some stuff for /etc/ethers.
1029                  */
1030                 hold = 48 * 1024;
1031                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
1032                     sizeof(hold));
1033         }
1034 #endif
1035
1036         optval = 1;
1037 #ifndef USE_SIN6_SCOPE_ID
1038 #ifdef IPV6_RECVPKTINFO
1039         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
1040             sizeof(optval)) < 0)
1041                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
1042 #else  /* old adv. API */
1043         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
1044             sizeof(optval)) < 0)
1045                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
1046 #endif
1047 #endif /* USE_SIN6_SCOPE_ID */
1048 #ifdef IPV6_RECVHOPLIMIT
1049         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
1050             sizeof(optval)) < 0)
1051                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
1052 #else  /* old adv. API */
1053         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
1054             sizeof(optval)) < 0)
1055                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
1056 #endif
1057
1058         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
1059             (unsigned long)(pingerlen() - 8));
1060         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
1061         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
1062
1063         if (preload == 0)
1064                 pinger();
1065         else {
1066                 if (npackets != 0 && preload > npackets)
1067                         preload = npackets;
1068                 while (preload--)
1069                         pinger();
1070         }
1071         gettimeofday(&last, NULL);
1072
1073         sigemptyset(&si_sa.sa_mask);
1074         si_sa.sa_flags = 0;
1075         si_sa.sa_handler = onsignal;
1076         if (sigaction(SIGINT, &si_sa, 0) == -1)
1077                 err(EX_OSERR, "sigaction SIGINT");
1078         seenint = 0;
1079 #ifdef SIGINFO
1080         if (sigaction(SIGINFO, &si_sa, 0) == -1)
1081                 err(EX_OSERR, "sigaction SIGINFO");
1082         seeninfo = 0;
1083 #endif
1084         if (alarmtimeout > 0) {
1085                 if (sigaction(SIGALRM, &si_sa, 0) == -1)
1086                         err(EX_OSERR, "sigaction SIGALRM");
1087         }
1088         if (options & F_FLOOD) {
1089                 intvl.tv_sec = 0;
1090                 intvl.tv_usec = 10000;
1091         } else if ((options & F_INTERVAL) == 0) {
1092                 intvl.tv_sec = interval / 1000;
1093                 intvl.tv_usec = interval % 1000 * 1000;
1094         }
1095
1096         almost_done = 0;
1097         while (seenint == 0) {
1098                 struct timeval now, timeout;
1099                 struct msghdr m;
1100                 struct iovec iov[2];
1101                 fd_set rfds;
1102                 int n;
1103
1104                 /* signal handling */
1105                 if (seenint)
1106                         onint(SIGINT);
1107 #ifdef SIGINFO
1108                 if (seeninfo) {
1109                         summary();
1110                         seeninfo = 0;
1111                         continue;
1112                 }
1113 #endif
1114                 FD_ZERO(&rfds);
1115                 FD_SET(s, &rfds);
1116                 gettimeofday(&now, NULL);
1117                 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
1118                 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
1119                 while (timeout.tv_usec < 0) {
1120                         timeout.tv_usec += 1000000;
1121                         timeout.tv_sec--;
1122                 }
1123                 while (timeout.tv_usec > 1000000) {
1124                         timeout.tv_usec -= 1000000;
1125                         timeout.tv_sec++;
1126                 }
1127                 if (timeout.tv_sec < 0)
1128                         timeout.tv_sec = timeout.tv_usec = 0;
1129
1130                 n = select(s + 1, &rfds, NULL, NULL, &timeout);
1131                 if (n < 0)
1132                         continue;       /* EINTR */
1133                 if (n == 1) {
1134                         m.msg_name = (caddr_t)&from;
1135                         m.msg_namelen = sizeof(from);
1136                         memset(&iov, 0, sizeof(iov));
1137                         iov[0].iov_base = (caddr_t)packet;
1138                         iov[0].iov_len = packlen;
1139                         m.msg_iov = iov;
1140                         m.msg_iovlen = 1;
1141                         memset(cm, 0, CONTROLLEN);
1142                         m.msg_control = (void *)cm;
1143                         m.msg_controllen = CONTROLLEN;
1144
1145                         cc = recvmsg(s, &m, 0);
1146                         if (cc < 0) {
1147                                 if (errno != EINTR) {
1148                                         warn("recvmsg");
1149                                         sleep(1);
1150                                 }
1151                                 continue;
1152                         } else if (cc == 0) {
1153                                 int mtu;
1154
1155                                 /*
1156                                  * receive control messages only. Process the
1157                                  * exceptions (currently the only possibility is
1158                                  * a path MTU notification.)
1159                                  */
1160                                 if ((mtu = get_pathmtu(&m)) > 0) {
1161                                         if ((options & F_VERBOSE) != 0) {
1162                                                 printf("new path MTU (%d) is "
1163                                                     "notified\n", mtu);
1164                                         }
1165                                 }
1166                                 continue;
1167                         } else {
1168                                 /*
1169                                  * an ICMPv6 message (probably an echoreply)
1170                                  * arrived.
1171                                  */
1172                                 pr_pack(packet, cc, &m);
1173                         }
1174                         if (((options & F_ONCE) != 0 && nreceived > 0) ||
1175                             (npackets > 0 && nreceived >= npackets))
1176                                 break;
1177                 }
1178                 if (n == 0 || (options & F_FLOOD)) {
1179                         if (npackets == 0 || ntransmitted < npackets)
1180                                 pinger();
1181                         else {
1182                                 if (almost_done)
1183                                         break;
1184                                 almost_done = 1;
1185                         /*
1186                          * If we're not transmitting any more packets,
1187                          * change the timer to wait two round-trip times
1188                          * if we've received any packets or (waittime)
1189                          * milliseconds if we haven't.
1190                          */
1191                                 intvl.tv_usec = 0;
1192                                 if (nreceived) {
1193                                         intvl.tv_sec = 2 * tmax / 1000;
1194                                         if (intvl.tv_sec == 0)
1195                                                 intvl.tv_sec = 1;
1196                                 } else {
1197                                         intvl.tv_sec = waittime / 1000;
1198                                         intvl.tv_usec = waittime % 1000 * 1000;
1199                                 }
1200                         }
1201                         gettimeofday(&last, NULL);
1202                         if (ntransmitted - nreceived - 1 > nmissedmax) {
1203                                 nmissedmax = ntransmitted - nreceived - 1;
1204                                 if (options & F_MISSED)
1205                                         (void)write(STDOUT_FILENO, &BBELL, 1);
1206                         }
1207                 }
1208         }
1209         sigemptyset(&si_sa.sa_mask);
1210         si_sa.sa_flags = 0;
1211         si_sa.sa_handler = SIG_IGN;
1212         sigaction(SIGINT, &si_sa, 0);
1213         sigaction(SIGALRM, &si_sa, 0);
1214         summary();
1215
1216         if (res != NULL)
1217                 freeaddrinfo(res);
1218
1219         if(packet != NULL)
1220                 free(packet);
1221
1222         exit(nreceived == 0 ? 2 : 0);
1223 }
1224
1225 void
1226 onsignal(int sig)
1227 {
1228
1229         switch (sig) {
1230         case SIGINT:
1231         case SIGALRM:
1232                 seenint++;
1233                 break;
1234 #ifdef SIGINFO
1235         case SIGINFO:
1236                 seeninfo++;
1237                 break;
1238 #endif
1239         }
1240 }
1241
1242 /*
1243  * pinger --
1244  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1245  * will be added on by the kernel.  The ID field is our UNIX process ID,
1246  * and the sequence number is an ascending integer.  The first 8 bytes
1247  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1248  * byte-order, to compute the round-trip time.
1249  */
1250 size_t
1251 pingerlen(void)
1252 {
1253         size_t l;
1254
1255         if (options & F_FQDN)
1256                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1257         else if (options & F_FQDNOLD)
1258                 l = ICMP6_NIQLEN;
1259         else if (options & F_NODEADDR)
1260                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1261         else if (options & F_SUPTYPES)
1262                 l = ICMP6_NIQLEN;
1263         else
1264                 l = ICMP6ECHOLEN + datalen;
1265
1266         return l;
1267 }
1268
1269 int
1270 pinger(void)
1271 {
1272         struct icmp6_hdr *icp;
1273         struct iovec iov[2];
1274         int i, cc;
1275         struct icmp6_nodeinfo *nip;
1276         int seq;
1277
1278         if (npackets && ntransmitted >= npackets)
1279                 return(-1);     /* no more transmission */
1280
1281         icp = (struct icmp6_hdr *)outpack;
1282         nip = (struct icmp6_nodeinfo *)outpack;
1283         memset(icp, 0, sizeof(*icp));
1284         icp->icmp6_cksum = 0;
1285         seq = ntransmitted++;
1286         CLR(seq % mx_dup_ck);
1287
1288         if (options & F_FQDN) {
1289                 icp->icmp6_type = ICMP6_NI_QUERY;
1290                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1291                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1292                 nip->ni_flags = htons(0);
1293
1294                 memcpy(nip->icmp6_ni_nonce, nonce,
1295                     sizeof(nip->icmp6_ni_nonce));
1296                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1297
1298                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1299                     sizeof(dst.sin6_addr));
1300                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1301                 datalen = 0;
1302         } else if (options & F_FQDNOLD) {
1303                 /* packet format in 03 draft - no Subject data on queries */
1304                 icp->icmp6_type = ICMP6_NI_QUERY;
1305                 icp->icmp6_code = 0;    /* code field is always 0 */
1306                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1307                 nip->ni_flags = htons(0);
1308
1309                 memcpy(nip->icmp6_ni_nonce, nonce,
1310                     sizeof(nip->icmp6_ni_nonce));
1311                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1312
1313                 cc = ICMP6_NIQLEN;
1314                 datalen = 0;
1315         } else if (options & F_NODEADDR) {
1316                 icp->icmp6_type = ICMP6_NI_QUERY;
1317                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1318                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1319                 nip->ni_flags = naflags;
1320
1321                 memcpy(nip->icmp6_ni_nonce, nonce,
1322                     sizeof(nip->icmp6_ni_nonce));
1323                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1324
1325                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1326                     sizeof(dst.sin6_addr));
1327                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1328                 datalen = 0;
1329         } else if (options & F_SUPTYPES) {
1330                 icp->icmp6_type = ICMP6_NI_QUERY;
1331                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1332                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1333                 /* we support compressed bitmap */
1334                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1335
1336                 memcpy(nip->icmp6_ni_nonce, nonce,
1337                     sizeof(nip->icmp6_ni_nonce));
1338                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1339                 cc = ICMP6_NIQLEN;
1340                 datalen = 0;
1341         } else {
1342                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1343                 icp->icmp6_code = 0;
1344                 icp->icmp6_id = htons(ident);
1345                 icp->icmp6_seq = ntohs(seq);
1346                 if (timing) {
1347                         struct timeval tv;
1348                         struct tv32 *tv32;
1349                         (void)gettimeofday(&tv, NULL);
1350                         tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1351                         tv32->tv32_sec = htonl(tv.tv_sec);
1352                         tv32->tv32_usec = htonl(tv.tv_usec);
1353                 }
1354                 cc = ICMP6ECHOLEN + datalen;
1355         }
1356
1357 #ifdef DIAGNOSTIC
1358         if (pingerlen() != cc)
1359                 errx(1, "internal error; length mismatch");
1360 #endif
1361
1362         smsghdr.msg_name = (caddr_t)&dst;
1363         smsghdr.msg_namelen = sizeof(dst);
1364         memset(&iov, 0, sizeof(iov));
1365         iov[0].iov_base = (caddr_t)outpack;
1366         iov[0].iov_len = cc;
1367         smsghdr.msg_iov = iov;
1368         smsghdr.msg_iovlen = 1;
1369
1370         i = sendmsg(s, &smsghdr, 0);
1371
1372         if (i < 0 || i != cc)  {
1373                 if (i < 0)
1374                         warn("sendmsg");
1375                 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1376                     hostname, cc, i);
1377         }
1378         if (!(options & F_QUIET) && options & F_FLOOD)
1379                 (void)write(STDOUT_FILENO, &DOT, 1);
1380
1381         return(0);
1382 }
1383
1384 int
1385 myechoreply(const struct icmp6_hdr *icp)
1386 {
1387         if (ntohs(icp->icmp6_id) == ident)
1388                 return 1;
1389         else
1390                 return 0;
1391 }
1392
1393 int
1394 mynireply(const struct icmp6_nodeinfo *nip)
1395 {
1396         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1397             nonce + sizeof(u_int16_t),
1398             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1399                 return 1;
1400         else
1401                 return 0;
1402 }
1403
1404 char *
1405 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1406         size_t bufsiz)
1407         /*base for compressed name*/
1408 {
1409         int i;
1410         const u_char *cp;
1411         char cresult[MAXDNAME + 1];
1412         const u_char *comp;
1413         int l;
1414
1415         cp = *sp;
1416         *buf = '\0';
1417
1418         if (cp >= ep)
1419                 return NULL;
1420         while (cp < ep) {
1421                 i = *cp;
1422                 if (i == 0 || cp != *sp) {
1423                         if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1424                                 return NULL;    /*result overrun*/
1425                 }
1426                 if (i == 0)
1427                         break;
1428                 cp++;
1429
1430                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1431                         /* DNS compression */
1432                         if (!base)
1433                                 return NULL;
1434
1435                         comp = base + (i & 0x3f);
1436                         if (dnsdecode(&comp, cp, base, cresult,
1437                             sizeof(cresult)) == NULL)
1438                                 return NULL;
1439                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1440                                 return NULL;    /*result overrun*/
1441                         break;
1442                 } else if ((i & 0x3f) == i) {
1443                         if (i > ep - cp)
1444                                 return NULL;    /*source overrun*/
1445                         while (i-- > 0 && cp < ep) {
1446                                 l = snprintf(cresult, sizeof(cresult),
1447                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1448                                 if (l >= sizeof(cresult) || l < 0)
1449                                         return NULL;
1450                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1451                                         return NULL;    /*result overrun*/
1452                                 cp++;
1453                         }
1454                 } else
1455                         return NULL;    /*invalid label*/
1456         }
1457         if (i != 0)
1458                 return NULL;    /*not terminated*/
1459         cp++;
1460         *sp = cp;
1461         return buf;
1462 }
1463
1464 /*
1465  * pr_pack --
1466  *      Print out the packet, if it came from us.  This logic is necessary
1467  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1468  * which arrive ('tis only fair).  This permits multiple copies of this
1469  * program to be run without having intermingled output (or statistics!).
1470  */
1471 void
1472 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1473 {
1474 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1475         struct icmp6_hdr *icp;
1476         struct icmp6_nodeinfo *ni;
1477         int i;
1478         int hoplim;
1479         struct sockaddr *from;
1480         int fromlen;
1481         u_char *cp = NULL, *dp, *end = buf + cc;
1482         struct in6_pktinfo *pktinfo = NULL;
1483         struct timeval tv, tp;
1484         struct tv32 *tpp;
1485         double triptime = 0;
1486         int dupflag;
1487         size_t off;
1488         int oldfqdn;
1489         u_int16_t seq;
1490         char dnsname[MAXDNAME + 1];
1491
1492         (void)gettimeofday(&tv, NULL);
1493
1494         if (!mhdr || !mhdr->msg_name ||
1495             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1496             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1497                 if (options & F_VERBOSE)
1498                         warnx("invalid peername");
1499                 return;
1500         }
1501         from = (struct sockaddr *)mhdr->msg_name;
1502         fromlen = mhdr->msg_namelen;
1503         if (cc < sizeof(struct icmp6_hdr)) {
1504                 if (options & F_VERBOSE)
1505                         warnx("packet too short (%d bytes) from %s", cc,
1506                             pr_addr(from, fromlen));
1507                 return;
1508         }
1509         if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1510             (options & F_VERBOSE) != 0)
1511                 warnx("some control data discarded, insufficient buffer size");
1512         icp = (struct icmp6_hdr *)buf;
1513         ni = (struct icmp6_nodeinfo *)buf;
1514         off = 0;
1515
1516         if ((hoplim = get_hoplim(mhdr)) == -1) {
1517                 warnx("failed to get receiving hop limit");
1518                 return;
1519         }
1520         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1521                 warnx("failed to get receiving packet information");
1522                 return;
1523         }
1524
1525         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1526                 seq = ntohs(icp->icmp6_seq);
1527                 ++nreceived;
1528                 if (timing) {
1529                         tpp = (struct tv32 *)(icp + 1);
1530                         tp.tv_sec = ntohl(tpp->tv32_sec);
1531                         tp.tv_usec = ntohl(tpp->tv32_usec);
1532                         tvsub(&tv, &tp);
1533                         triptime = ((double)tv.tv_sec) * 1000.0 +
1534                             ((double)tv.tv_usec) / 1000.0;
1535                         tsum += triptime;
1536                         tsumsq += triptime * triptime;
1537                         if (triptime < tmin)
1538                                 tmin = triptime;
1539                         if (triptime > tmax)
1540                                 tmax = triptime;
1541                 }
1542
1543                 if (TST(seq % mx_dup_ck)) {
1544                         ++nrepeats;
1545                         --nreceived;
1546                         dupflag = 1;
1547                 } else {
1548                         SET(seq % mx_dup_ck);
1549                         dupflag = 0;
1550                 }
1551
1552                 if (options & F_QUIET)
1553                         return;
1554
1555                 if (options & F_WAITTIME && triptime > waittime) {
1556                         ++nrcvtimeout;
1557                         return;
1558                 }
1559
1560                 if (options & F_FLOOD)
1561                         (void)write(STDOUT_FILENO, &BSPACE, 1);
1562                 else {
1563                         if (options & F_AUDIBLE)
1564                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1565                         (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1566                             pr_addr(from, fromlen), seq);
1567                         (void)printf(" hlim=%d", hoplim);
1568                         if ((options & F_VERBOSE) != 0) {
1569                                 struct sockaddr_in6 dstsa;
1570
1571                                 memset(&dstsa, 0, sizeof(dstsa));
1572                                 dstsa.sin6_family = AF_INET6;
1573                                 dstsa.sin6_len = sizeof(dstsa);
1574                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1575                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1576                                 (void)printf(" dst=%s",
1577                                     pr_addr((struct sockaddr *)&dstsa,
1578                                     sizeof(dstsa)));
1579                         }
1580                         if (timing)
1581                                 (void)printf(" time=%.3f ms", triptime);
1582                         if (dupflag)
1583                                 (void)printf("(DUP!)");
1584                         /* check the data */
1585                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1586                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1587                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1588                                 if (*cp != *dp) {
1589                                         (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1590                                         break;
1591                                 }
1592                         }
1593                 }
1594         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1595                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1596                 ++nreceived;
1597                 if (TST(seq % mx_dup_ck)) {
1598                         ++nrepeats;
1599                         --nreceived;
1600                         dupflag = 1;
1601                 } else {
1602                         SET(seq % mx_dup_ck);
1603                         dupflag = 0;
1604                 }
1605
1606                 if (options & F_QUIET)
1607                         return;
1608
1609                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1610
1611                 switch (ntohs(ni->ni_code)) {
1612                 case ICMP6_NI_SUCCESS:
1613                         break;
1614                 case ICMP6_NI_REFUSED:
1615                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1616                         goto fqdnend;
1617                 case ICMP6_NI_UNKNOWN:
1618                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1619                         goto fqdnend;
1620                 default:
1621                         printf("unknown code 0x%x, type 0x%x",
1622                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1623                         goto fqdnend;
1624                 }
1625
1626                 switch (ntohs(ni->ni_qtype)) {
1627                 case NI_QTYPE_NOOP:
1628                         printf("NodeInfo NOOP");
1629                         break;
1630                 case NI_QTYPE_SUPTYPES:
1631                         pr_suptypes(ni, end - (u_char *)ni);
1632                         break;
1633                 case NI_QTYPE_NODEADDR:
1634                         pr_nodeaddr(ni, end - (u_char *)ni);
1635                         break;
1636                 case NI_QTYPE_FQDN:
1637                 default:        /* XXX: for backward compatibility */
1638                         cp = (u_char *)ni + ICMP6_NIRLEN;
1639                         if (buf[off + ICMP6_NIRLEN] ==
1640                             cc - off - ICMP6_NIRLEN - 1)
1641                                 oldfqdn = 1;
1642                         else
1643                                 oldfqdn = 0;
1644                         if (oldfqdn) {
1645                                 cp++;   /* skip length */
1646                                 while (cp < end) {
1647                                         safeputc(*cp & 0xff);
1648                                         cp++;
1649                                 }
1650                         } else {
1651                                 i = 0;
1652                                 while (cp < end) {
1653                                         if (dnsdecode((const u_char **)&cp, end,
1654                                             (const u_char *)(ni + 1), dnsname,
1655                                             sizeof(dnsname)) == NULL) {
1656                                                 printf("???");
1657                                                 break;
1658                                         }
1659                                         /*
1660                                          * name-lookup special handling for
1661                                          * truncated name
1662                                          */
1663                                         if (cp + 1 <= end && !*cp &&
1664                                             strlen(dnsname) > 0) {
1665                                                 dnsname[strlen(dnsname) - 1] = '\0';
1666                                                 cp++;
1667                                         }
1668                                         printf("%s%s", i > 0 ? "," : "",
1669                                             dnsname);
1670                                 }
1671                         }
1672                         if (options & F_VERBOSE) {
1673                                 int32_t ttl;
1674                                 int comma = 0;
1675
1676                                 (void)printf(" (");     /*)*/
1677
1678                                 switch (ni->ni_code) {
1679                                 case ICMP6_NI_REFUSED:
1680                                         (void)printf("refused");
1681                                         comma++;
1682                                         break;
1683                                 case ICMP6_NI_UNKNOWN:
1684                                         (void)printf("unknown qtype");
1685                                         comma++;
1686                                         break;
1687                                 }
1688
1689                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1690                                         /* case of refusion, unknown */
1691                                         /*(*/
1692                                         putchar(')');
1693                                         goto fqdnend;
1694                                 }
1695                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1696                                 if (comma)
1697                                         printf(",");
1698                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1699                                         (void)printf("TTL=%d:meaningless",
1700                                             (int)ttl);
1701                                 } else {
1702                                         if (ttl < 0) {
1703                                                 (void)printf("TTL=%d:invalid",
1704                                                    ttl);
1705                                         } else
1706                                                 (void)printf("TTL=%d", ttl);
1707                                 }
1708                                 comma++;
1709
1710                                 if (oldfqdn) {
1711                                         if (comma)
1712                                                 printf(",");
1713                                         printf("03 draft");
1714                                         comma++;
1715                                 } else {
1716                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1717                                         if (cp == end) {
1718                                                 if (comma)
1719                                                         printf(",");
1720                                                 printf("no name");
1721                                                 comma++;
1722                                         }
1723                                 }
1724
1725                                 if (buf[off + ICMP6_NIRLEN] !=
1726                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1727                                         if (comma)
1728                                                 printf(",");
1729                                         (void)printf("invalid namelen:%d/%lu",
1730                                             buf[off + ICMP6_NIRLEN],
1731                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1732                                         comma++;
1733                                 }
1734                                 /*(*/
1735                                 putchar(')');
1736                         }
1737                 fqdnend:
1738                         ;
1739                 }
1740         } else {
1741                 /* We've got something other than an ECHOREPLY */
1742                 if (!(options & F_VERBOSE))
1743                         return;
1744                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1745                 pr_icmph(icp, end);
1746         }
1747
1748         if (!(options & F_FLOOD)) {
1749                 (void)putchar('\n');
1750                 if (options & F_VERBOSE)
1751                         pr_exthdrs(mhdr);
1752                 (void)fflush(stdout);
1753         }
1754 #undef safeputc
1755 }
1756
1757 void
1758 pr_exthdrs(struct msghdr *mhdr)
1759 {
1760         ssize_t bufsize;
1761         void    *bufp;
1762         struct cmsghdr *cm;
1763
1764         bufsize = 0;
1765         bufp = mhdr->msg_control;
1766         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1767              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1768                 if (cm->cmsg_level != IPPROTO_IPV6)
1769                         continue;
1770
1771                 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1772                 if (bufsize <= 0)
1773                         continue;
1774                 switch (cm->cmsg_type) {
1775                 case IPV6_HOPOPTS:
1776                         printf("  HbH Options: ");
1777                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1778                         break;
1779                 case IPV6_DSTOPTS:
1780 #ifdef IPV6_RTHDRDSTOPTS
1781                 case IPV6_RTHDRDSTOPTS:
1782 #endif
1783                         printf("  Dst Options: ");
1784                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1785                         break;
1786                 case IPV6_RTHDR:
1787                         printf("  Routing: ");
1788                         pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1789                         break;
1790                 }
1791         }
1792 }
1793
1794 #ifdef USE_RFC2292BIS
1795 void
1796 pr_ip6opt(void *extbuf, size_t bufsize)
1797 {
1798         struct ip6_hbh *ext;
1799         int currentlen;
1800         u_int8_t type;
1801         socklen_t extlen, len;
1802         void *databuf;
1803         size_t offset;
1804         u_int16_t value2;
1805         u_int32_t value4;
1806
1807         ext = (struct ip6_hbh *)extbuf;
1808         extlen = (ext->ip6h_len + 1) * 8;
1809         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1810             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1811
1812         /*
1813          * Bounds checking on the ancillary data buffer:
1814          *     subtract the size of a cmsg structure from the buffer size.
1815          */
1816         if (bufsize < (extlen  + CMSG_SPACE(0))) {
1817                 extlen = bufsize - CMSG_SPACE(0);
1818                 warnx("options truncated, showing only %u (total=%u)",
1819                     (unsigned int)(extlen / 8 - 1),
1820                     (unsigned int)(ext->ip6h_len));
1821         }
1822
1823         currentlen = 0;
1824         while (1) {
1825                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1826                     &type, &len, &databuf);
1827                 if (currentlen == -1)
1828                         break;
1829                 switch (type) {
1830                 /*
1831                  * Note that inet6_opt_next automatically skips any padding
1832                  * optins.
1833                  */
1834                 case IP6OPT_JUMBO:
1835                         offset = 0;
1836                         offset = inet6_opt_get_val(databuf, offset,
1837                             &value4, sizeof(value4));
1838                         printf("    Jumbo Payload Opt: Length %u\n",
1839                             (u_int32_t)ntohl(value4));
1840                         break;
1841                 case IP6OPT_ROUTER_ALERT:
1842                         offset = 0;
1843                         offset = inet6_opt_get_val(databuf, offset,
1844                                                    &value2, sizeof(value2));
1845                         printf("    Router Alert Opt: Type %u\n",
1846                             ntohs(value2));
1847                         break;
1848                 default:
1849                         printf("    Received Opt %u len %lu\n",
1850                             type, (unsigned long)len);
1851                         break;
1852                 }
1853         }
1854         return;
1855 }
1856 #else  /* !USE_RFC2292BIS */
1857 /* ARGSUSED */
1858 void
1859 pr_ip6opt(void *extbuf, size_t bufsize __unused)
1860 {
1861         putchar('\n');
1862         return;
1863 }
1864 #endif /* USE_RFC2292BIS */
1865
1866 #ifdef USE_RFC2292BIS
1867 void
1868 pr_rthdr(void *extbuf, size_t bufsize)
1869 {
1870         struct in6_addr *in6;
1871         char ntopbuf[INET6_ADDRSTRLEN];
1872         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1873         int i, segments, origsegs, rthsize, size0, size1;
1874
1875         /* print fixed part of the header */
1876         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1877             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1878         if ((segments = inet6_rth_segments(extbuf)) >= 0) {
1879                 printf("%d segments, ", segments);
1880                 printf("%d left\n", rh->ip6r_segleft);
1881         } else {
1882                 printf("segments unknown, ");
1883                 printf("%d left\n", rh->ip6r_segleft);
1884                 return;
1885         }
1886
1887         /*
1888          * Bounds checking on the ancillary data buffer. When calculating
1889          * the number of items to show keep in mind:
1890          *      - The size of the cmsg structure
1891          *      - The size of one segment (the size of a Type 0 routing header)
1892          *      - When dividing add a fudge factor of one in case the
1893          *        dividend is not evenly divisible by the divisor
1894          */
1895         rthsize = (rh->ip6r_len + 1) * 8;
1896         if (bufsize < (rthsize + CMSG_SPACE(0))) {
1897                 origsegs = segments;
1898                 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
1899                 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
1900                 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
1901                     (size1 - size0) + 1;
1902                 warnx("segments truncated, showing only %d (total=%d)",
1903                     segments, origsegs);
1904         }
1905
1906         for (i = 0; i < segments; i++) {
1907                 in6 = inet6_rth_getaddr(extbuf, i);
1908                 if (in6 == NULL)
1909                         printf("   [%d]<NULL>\n", i);
1910                 else {
1911                         if (!inet_ntop(AF_INET6, in6, ntopbuf,
1912                             sizeof(ntopbuf)))
1913                                 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1914                         printf("   [%d]%s\n", i, ntopbuf);
1915                 }
1916         }
1917
1918         return;
1919
1920 }
1921
1922 #else  /* !USE_RFC2292BIS */
1923 /* ARGSUSED */
1924 void
1925 pr_rthdr(void *extbuf, size_t bufsize __unused)
1926 {
1927         putchar('\n');
1928         return;
1929 }
1930 #endif /* USE_RFC2292BIS */
1931
1932 int
1933 pr_bitrange(u_int32_t v, int soff, int ii)
1934 {
1935         int off;
1936         int i;
1937
1938         off = 0;
1939         while (off < 32) {
1940                 /* shift till we have 0x01 */
1941                 if ((v & 0x01) == 0) {
1942                         if (ii > 1)
1943                                 printf("-%u", soff + off - 1);
1944                         ii = 0;
1945                         switch (v & 0x0f) {
1946                         case 0x00:
1947                                 v >>= 4;
1948                                 off += 4;
1949                                 continue;
1950                         case 0x08:
1951                                 v >>= 3;
1952                                 off += 3;
1953                                 continue;
1954                         case 0x04: case 0x0c:
1955                                 v >>= 2;
1956                                 off += 2;
1957                                 continue;
1958                         default:
1959                                 v >>= 1;
1960                                 off += 1;
1961                                 continue;
1962                         }
1963                 }
1964
1965                 /* we have 0x01 with us */
1966                 for (i = 0; i < 32 - off; i++) {
1967                         if ((v & (0x01 << i)) == 0)
1968                                 break;
1969                 }
1970                 if (!ii)
1971                         printf(" %u", soff + off);
1972                 ii += i;
1973                 v >>= i; off += i;
1974         }
1975         return ii;
1976 }
1977
1978 void
1979 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1980         /* ni->qtype must be SUPTYPES */
1981 {
1982         size_t clen;
1983         u_int32_t v;
1984         const u_char *cp, *end;
1985         u_int16_t cur;
1986         struct cbit {
1987                 u_int16_t words;        /*32bit count*/
1988                 u_int16_t skip;
1989         } cbit;
1990 #define MAXQTYPES       (1 << 16)
1991         size_t off;
1992         int b;
1993
1994         cp = (u_char *)(ni + 1);
1995         end = ((u_char *)ni) + nilen;
1996         cur = 0;
1997         b = 0;
1998
1999         printf("NodeInfo Supported Qtypes");
2000         if (options & F_VERBOSE) {
2001                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
2002                         printf(", compressed bitmap");
2003                 else
2004                         printf(", raw bitmap");
2005         }
2006
2007         while (cp < end) {
2008                 clen = (size_t)(end - cp);
2009                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
2010                         if (clen == 0 || clen > MAXQTYPES / 8 ||
2011                             clen % sizeof(v)) {
2012                                 printf("???");
2013                                 return;
2014                         }
2015                 } else {
2016                         if (clen < sizeof(cbit) || clen % sizeof(v))
2017                                 return;
2018                         memcpy(&cbit, cp, sizeof(cbit));
2019                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2020                             clen)
2021                                 return;
2022                         cp += sizeof(cbit);
2023                         clen = ntohs(cbit.words) * sizeof(v);
2024                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
2025                             MAXQTYPES)
2026                                 return;
2027                 }
2028
2029                 for (off = 0; off < clen; off += sizeof(v)) {
2030                         memcpy(&v, cp + off, sizeof(v));
2031                         v = (u_int32_t)ntohl(v);
2032                         b = pr_bitrange(v, (int)(cur + off * 8), b);
2033                 }
2034                 /* flush the remaining bits */
2035                 b = pr_bitrange(0, (int)(cur + off * 8), b);
2036
2037                 cp += clen;
2038                 cur += clen * 8;
2039                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2040                         cur += ntohs(cbit.skip) * 32;
2041         }
2042 }
2043
2044 void
2045 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
2046         /* ni->qtype must be NODEADDR */
2047 {
2048         u_char *cp = (u_char *)(ni + 1);
2049         char ntop_buf[INET6_ADDRSTRLEN];
2050         int withttl = 0;
2051
2052         nilen -= sizeof(struct icmp6_nodeinfo);
2053
2054         if (options & F_VERBOSE) {
2055                 switch (ni->ni_code) {
2056                 case ICMP6_NI_REFUSED:
2057                         (void)printf("refused");
2058                         break;
2059                 case ICMP6_NI_UNKNOWN:
2060                         (void)printf("unknown qtype");
2061                         break;
2062                 }
2063                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2064                         (void)printf(" truncated");
2065         }
2066         putchar('\n');
2067         if (nilen <= 0)
2068                 printf("  no address\n");
2069
2070         /*
2071          * In icmp-name-lookups 05 and later, TTL of each returned address
2072          * is contained in the resposne. We try to detect the version
2073          * by the length of the data, but note that the detection algorithm
2074          * is incomplete. We assume the latest draft by default.
2075          */
2076         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
2077                 withttl = 1;
2078         while (nilen > 0) {
2079                 u_int32_t ttl;
2080
2081                 if (withttl) {
2082                         /* XXX: alignment? */
2083                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
2084                         cp += sizeof(u_int32_t);
2085                         nilen -= sizeof(u_int32_t);
2086                 }
2087
2088                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2089                     NULL)
2090                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2091                 printf("  %s", ntop_buf);
2092                 if (withttl) {
2093                         if (ttl == 0xffffffff) {
2094                                 /*
2095                                  * XXX: can this convention be applied to all
2096                                  * type of TTL (i.e. non-ND TTL)?
2097                                  */
2098                                 printf("(TTL=infty)");
2099                         }
2100                         else
2101                                 printf("(TTL=%u)", ttl);
2102                 }
2103                 putchar('\n');
2104
2105                 nilen -= sizeof(struct in6_addr);
2106                 cp += sizeof(struct in6_addr);
2107         }
2108 }
2109
2110 int
2111 get_hoplim(struct msghdr *mhdr)
2112 {
2113         struct cmsghdr *cm;
2114
2115         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2116              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2117                 if (cm->cmsg_len == 0)
2118                         return(-1);
2119
2120                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2121                     cm->cmsg_type == IPV6_HOPLIMIT &&
2122                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
2123                         return(*(int *)CMSG_DATA(cm));
2124         }
2125
2126         return(-1);
2127 }
2128
2129 struct in6_pktinfo *
2130 get_rcvpktinfo(struct msghdr *mhdr)
2131 {
2132         struct cmsghdr *cm;
2133
2134         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2135              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2136                 if (cm->cmsg_len == 0)
2137                         return(NULL);
2138
2139                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2140                     cm->cmsg_type == IPV6_PKTINFO &&
2141                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2142                         return((struct in6_pktinfo *)CMSG_DATA(cm));
2143         }
2144
2145         return(NULL);
2146 }
2147
2148 int
2149 get_pathmtu(struct msghdr *mhdr)
2150 {
2151 #ifdef IPV6_RECVPATHMTU
2152         struct cmsghdr *cm;
2153         struct ip6_mtuinfo *mtuctl = NULL;
2154
2155         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2156              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2157                 if (cm->cmsg_len == 0)
2158                         return(0);
2159
2160                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2161                     cm->cmsg_type == IPV6_PATHMTU &&
2162                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2163                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2164
2165                         /*
2166                          * If the notified destination is different from
2167                          * the one we are pinging, just ignore the info.
2168                          * We check the scope ID only when both notified value
2169                          * and our own value have non-0 values, because we may
2170                          * have used the default scope zone ID for sending,
2171                          * in which case the scope ID value is 0.
2172                          */
2173                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2174                                                 &dst.sin6_addr) ||
2175                             (mtuctl->ip6m_addr.sin6_scope_id &&
2176                              dst.sin6_scope_id &&
2177                              mtuctl->ip6m_addr.sin6_scope_id !=
2178                              dst.sin6_scope_id)) {
2179                                 if ((options & F_VERBOSE) != 0) {
2180                                         printf("path MTU for %s is notified. "
2181                                                "(ignored)\n",
2182                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2183                                            sizeof(mtuctl->ip6m_addr)));
2184                                 }
2185                                 return(0);
2186                         }
2187
2188                         /*
2189                          * Ignore an invalid MTU. XXX: can we just believe
2190                          * the kernel check?
2191                          */
2192                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2193                                 return(0);
2194
2195                         /* notification for our destination. return the MTU. */
2196                         return((int)mtuctl->ip6m_mtu);
2197                 }
2198         }
2199 #endif
2200         return(0);
2201 }
2202
2203 /*
2204  * tvsub --
2205  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2206  * be >= in.
2207  */
2208 void
2209 tvsub(struct timeval *out, struct timeval *in)
2210 {
2211         if ((out->tv_usec -= in->tv_usec) < 0) {
2212                 --out->tv_sec;
2213                 out->tv_usec += 1000000;
2214         }
2215         out->tv_sec -= in->tv_sec;
2216 }
2217
2218 /*
2219  * onint --
2220  *      SIGINT handler.
2221  */
2222 /* ARGSUSED */
2223 void
2224 onint(int notused __unused)
2225 {
2226         /*
2227          * When doing reverse DNS lookups, the seenint flag might not
2228          * be noticed for a while.  Just exit if we get a second SIGINT.
2229          */
2230         if ((options & F_HOSTNAME) && seenint != 0)
2231                 _exit(nreceived ? 0 : 2);
2232 }
2233
2234 /*
2235  * summary --
2236  *      Print out statistics.
2237  */
2238 void
2239 summary(void)
2240 {
2241
2242         (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2243         (void)printf("%ld packets transmitted, ", ntransmitted);
2244         (void)printf("%ld packets received, ", nreceived);
2245         if (nrepeats)
2246                 (void)printf("+%ld duplicates, ", nrepeats);
2247         if (ntransmitted) {
2248                 if (nreceived > ntransmitted)
2249                         (void)printf("-- somebody's duplicating packets!");
2250                 else
2251                         (void)printf("%.1f%% packet loss",
2252                             ((((double)ntransmitted - nreceived) * 100.0) /
2253                             ntransmitted));
2254         }
2255         if (nrcvtimeout)
2256                 printf(", %ld packets out of wait time", nrcvtimeout);
2257         (void)putchar('\n');
2258         if (nreceived && timing) {
2259                 /* Only display average to microseconds */
2260                 double num = nreceived + nrepeats;
2261                 double avg = tsum / num;
2262                 double dev = sqrt(tsumsq / num - avg * avg);
2263                 (void)printf(
2264                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2265                     tmin, avg, tmax, dev);
2266                 (void)fflush(stdout);
2267         }
2268         (void)fflush(stdout);
2269 }
2270
2271 /*subject type*/
2272 static const char *niqcode[] = {
2273         "IPv6 address",
2274         "DNS label",    /*or empty*/
2275         "IPv4 address",
2276 };
2277
2278 /*result code*/
2279 static const char *nircode[] = {
2280         "Success", "Refused", "Unknown",
2281 };
2282
2283
2284 /*
2285  * pr_icmph --
2286  *      Print a descriptive string about an ICMP header.
2287  */
2288 void
2289 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2290 {
2291         char ntop_buf[INET6_ADDRSTRLEN];
2292         struct nd_redirect *red;
2293         struct icmp6_nodeinfo *ni;
2294         char dnsname[MAXDNAME + 1];
2295         const u_char *cp;
2296         size_t l;
2297
2298         switch (icp->icmp6_type) {
2299         case ICMP6_DST_UNREACH:
2300                 switch (icp->icmp6_code) {
2301                 case ICMP6_DST_UNREACH_NOROUTE:
2302                         (void)printf("No Route to Destination\n");
2303                         break;
2304                 case ICMP6_DST_UNREACH_ADMIN:
2305                         (void)printf("Destination Administratively "
2306                             "Unreachable\n");
2307                         break;
2308                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2309                         (void)printf("Destination Unreachable Beyond Scope\n");
2310                         break;
2311                 case ICMP6_DST_UNREACH_ADDR:
2312                         (void)printf("Destination Host Unreachable\n");
2313                         break;
2314                 case ICMP6_DST_UNREACH_NOPORT:
2315                         (void)printf("Destination Port Unreachable\n");
2316                         break;
2317                 default:
2318                         (void)printf("Destination Unreachable, Bad Code: %d\n",
2319                             icp->icmp6_code);
2320                         break;
2321                 }
2322                 /* Print returned IP header information */
2323                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2324                 break;
2325         case ICMP6_PACKET_TOO_BIG:
2326                 (void)printf("Packet too big mtu = %d\n",
2327                     (int)ntohl(icp->icmp6_mtu));
2328                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2329                 break;
2330         case ICMP6_TIME_EXCEEDED:
2331                 switch (icp->icmp6_code) {
2332                 case ICMP6_TIME_EXCEED_TRANSIT:
2333                         (void)printf("Time to live exceeded\n");
2334                         break;
2335                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2336                         (void)printf("Frag reassembly time exceeded\n");
2337                         break;
2338                 default:
2339                         (void)printf("Time exceeded, Bad Code: %d\n",
2340                             icp->icmp6_code);
2341                         break;
2342                 }
2343                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2344                 break;
2345         case ICMP6_PARAM_PROB:
2346                 (void)printf("Parameter problem: ");
2347                 switch (icp->icmp6_code) {
2348                 case ICMP6_PARAMPROB_HEADER:
2349                         (void)printf("Erroneous Header ");
2350                         break;
2351                 case ICMP6_PARAMPROB_NEXTHEADER:
2352                         (void)printf("Unknown Nextheader ");
2353                         break;
2354                 case ICMP6_PARAMPROB_OPTION:
2355                         (void)printf("Unrecognized Option ");
2356                         break;
2357                 default:
2358                         (void)printf("Bad code(%d) ", icp->icmp6_code);
2359                         break;
2360                 }
2361                 (void)printf("pointer = 0x%02x\n",
2362                     (u_int32_t)ntohl(icp->icmp6_pptr));
2363                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2364                 break;
2365         case ICMP6_ECHO_REQUEST:
2366                 (void)printf("Echo Request");
2367                 /* XXX ID + Seq + Data */
2368                 break;
2369         case ICMP6_ECHO_REPLY:
2370                 (void)printf("Echo Reply");
2371                 /* XXX ID + Seq + Data */
2372                 break;
2373         case ICMP6_MEMBERSHIP_QUERY:
2374                 (void)printf("Listener Query");
2375                 break;
2376         case ICMP6_MEMBERSHIP_REPORT:
2377                 (void)printf("Listener Report");
2378                 break;
2379         case ICMP6_MEMBERSHIP_REDUCTION:
2380                 (void)printf("Listener Done");
2381                 break;
2382         case ND_ROUTER_SOLICIT:
2383                 (void)printf("Router Solicitation");
2384                 break;
2385         case ND_ROUTER_ADVERT:
2386                 (void)printf("Router Advertisement");
2387                 break;
2388         case ND_NEIGHBOR_SOLICIT:
2389                 (void)printf("Neighbor Solicitation");
2390                 break;
2391         case ND_NEIGHBOR_ADVERT:
2392                 (void)printf("Neighbor Advertisement");
2393                 break;
2394         case ND_REDIRECT:
2395                 red = (struct nd_redirect *)icp;
2396                 (void)printf("Redirect\n");
2397                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2398                     sizeof(ntop_buf)))
2399                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2400                 (void)printf("Destination: %s", ntop_buf);
2401                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2402                     sizeof(ntop_buf)))
2403                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2404                 (void)printf(" New Target: %s", ntop_buf);
2405                 break;
2406         case ICMP6_NI_QUERY:
2407                 (void)printf("Node Information Query");
2408                 /* XXX ID + Seq + Data */
2409                 ni = (struct icmp6_nodeinfo *)icp;
2410                 l = end - (u_char *)(ni + 1);
2411                 printf(", ");
2412                 switch (ntohs(ni->ni_qtype)) {
2413                 case NI_QTYPE_NOOP:
2414                         (void)printf("NOOP");
2415                         break;
2416                 case NI_QTYPE_SUPTYPES:
2417                         (void)printf("Supported qtypes");
2418                         break;
2419                 case NI_QTYPE_FQDN:
2420                         (void)printf("DNS name");
2421                         break;
2422                 case NI_QTYPE_NODEADDR:
2423                         (void)printf("nodeaddr");
2424                         break;
2425                 case NI_QTYPE_IPV4ADDR:
2426                         (void)printf("IPv4 nodeaddr");
2427                         break;
2428                 default:
2429                         (void)printf("unknown qtype");
2430                         break;
2431                 }
2432                 if (options & F_VERBOSE) {
2433                         switch (ni->ni_code) {
2434                         case ICMP6_NI_SUBJ_IPV6:
2435                                 if (l == sizeof(struct in6_addr) &&
2436                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2437                                     sizeof(ntop_buf)) != NULL) {
2438                                         (void)printf(", subject=%s(%s)",
2439                                             niqcode[ni->ni_code], ntop_buf);
2440                                 } else {
2441 #if 1
2442                                         /* backward compat to -W */
2443                                         (void)printf(", oldfqdn");
2444 #else
2445                                         (void)printf(", invalid");
2446 #endif
2447                                 }
2448                                 break;
2449                         case ICMP6_NI_SUBJ_FQDN:
2450                                 if (end == (u_char *)(ni + 1)) {
2451                                         (void)printf(", no subject");
2452                                         break;
2453                                 }
2454                                 printf(", subject=%s", niqcode[ni->ni_code]);
2455                                 cp = (const u_char *)(ni + 1);
2456                                 if (dnsdecode(&cp, end, NULL, dnsname,
2457                                     sizeof(dnsname)) != NULL)
2458                                         printf("(%s)", dnsname);
2459                                 else
2460                                         printf("(invalid)");
2461                                 break;
2462                         case ICMP6_NI_SUBJ_IPV4:
2463                                 if (l == sizeof(struct in_addr) &&
2464                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2465                                     sizeof(ntop_buf)) != NULL) {
2466                                         (void)printf(", subject=%s(%s)",
2467                                             niqcode[ni->ni_code], ntop_buf);
2468                                 } else
2469                                         (void)printf(", invalid");
2470                                 break;
2471                         default:
2472                                 (void)printf(", invalid");
2473                                 break;
2474                         }
2475                 }
2476                 break;
2477         case ICMP6_NI_REPLY:
2478                 (void)printf("Node Information Reply");
2479                 /* XXX ID + Seq + Data */
2480                 ni = (struct icmp6_nodeinfo *)icp;
2481                 printf(", ");
2482                 switch (ntohs(ni->ni_qtype)) {
2483                 case NI_QTYPE_NOOP:
2484                         (void)printf("NOOP");
2485                         break;
2486                 case NI_QTYPE_SUPTYPES:
2487                         (void)printf("Supported qtypes");
2488                         break;
2489                 case NI_QTYPE_FQDN:
2490                         (void)printf("DNS name");
2491                         break;
2492                 case NI_QTYPE_NODEADDR:
2493                         (void)printf("nodeaddr");
2494                         break;
2495                 case NI_QTYPE_IPV4ADDR:
2496                         (void)printf("IPv4 nodeaddr");
2497                         break;
2498                 default:
2499                         (void)printf("unknown qtype");
2500                         break;
2501                 }
2502                 if (options & F_VERBOSE) {
2503                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2504                                 printf(", invalid");
2505                         else
2506                                 printf(", %s", nircode[ni->ni_code]);
2507                 }
2508                 break;
2509         default:
2510                 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2511         }
2512 }
2513
2514 /*
2515  * pr_iph --
2516  *      Print an IP6 header.
2517  */
2518 void
2519 pr_iph(struct ip6_hdr *ip6)
2520 {
2521         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2522         u_int8_t tc;
2523         char ntop_buf[INET6_ADDRSTRLEN];
2524
2525         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2526         tc = (tc >> 4) & 0x0f;
2527         tc |= (ip6->ip6_vfc << 4);
2528
2529         printf("Vr TC  Flow Plen Nxt Hlim\n");
2530         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2531             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2532             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2533         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2534                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2535         printf("%s->", ntop_buf);
2536         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2537                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2538         printf("%s\n", ntop_buf);
2539 }
2540
2541 /*
2542  * pr_addr --
2543  *      Return an ascii host address as a dotted quad and optionally with
2544  * a hostname.
2545  */
2546 const char *
2547 pr_addr(struct sockaddr *addr, int addrlen)
2548 {
2549         static char buf[NI_MAXHOST];
2550         int flag = 0;
2551
2552         if ((options & F_HOSTNAME) == 0)
2553                 flag |= NI_NUMERICHOST;
2554
2555         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2556                 return (buf);
2557         else
2558                 return "?";
2559 }
2560
2561 /*
2562  * pr_retip --
2563  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2564  */
2565 void
2566 pr_retip(struct ip6_hdr *ip6, u_char *end)
2567 {
2568         u_char *cp = (u_char *)ip6, nh;
2569         int hlen;
2570
2571         if (end - (u_char *)ip6 < sizeof(*ip6)) {
2572                 printf("IP6");
2573                 goto trunc;
2574         }
2575         pr_iph(ip6);
2576         hlen = sizeof(*ip6);
2577
2578         nh = ip6->ip6_nxt;
2579         cp += hlen;
2580         while (end - cp >= 8) {
2581                 switch (nh) {
2582                 case IPPROTO_HOPOPTS:
2583                         printf("HBH ");
2584                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2585                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2586                         break;
2587                 case IPPROTO_DSTOPTS:
2588                         printf("DSTOPT ");
2589                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2590                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2591                         break;
2592                 case IPPROTO_FRAGMENT:
2593                         printf("FRAG ");
2594                         hlen = sizeof(struct ip6_frag);
2595                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2596                         break;
2597                 case IPPROTO_ROUTING:
2598                         printf("RTHDR ");
2599                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2600                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2601                         break;
2602 #ifdef IPSEC
2603                 case IPPROTO_AH:
2604                         printf("AH ");
2605                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2606                         nh = ((struct ah *)cp)->ah_nxt;
2607                         break;
2608 #endif
2609                 case IPPROTO_ICMPV6:
2610                         printf("ICMP6: type = %d, code = %d\n",
2611                             *cp, *(cp + 1));
2612                         return;
2613                 case IPPROTO_ESP:
2614                         printf("ESP\n");
2615                         return;
2616                 case IPPROTO_TCP:
2617                         printf("TCP: from port %u, to port %u (decimal)\n",
2618                             (*cp * 256 + *(cp + 1)),
2619                             (*(cp + 2) * 256 + *(cp + 3)));
2620                         return;
2621                 case IPPROTO_UDP:
2622                         printf("UDP: from port %u, to port %u (decimal)\n",
2623                             (*cp * 256 + *(cp + 1)),
2624                             (*(cp + 2) * 256 + *(cp + 3)));
2625                         return;
2626                 default:
2627                         printf("Unknown Header(%d)\n", nh);
2628                         return;
2629                 }
2630
2631                 if ((cp += hlen) >= end)
2632                         goto trunc;
2633         }
2634         if (end - cp < 8)
2635                 goto trunc;
2636
2637         putchar('\n');
2638         return;
2639
2640   trunc:
2641         printf("...\n");
2642         return;
2643 }
2644
2645 void
2646 fill(char *bp, char *patp)
2647 {
2648         int ii, jj, kk;
2649         int pat[16];
2650         char *cp;
2651
2652         for (cp = patp; *cp; cp++)
2653                 if (!isxdigit(*cp))
2654                         errx(1, "patterns must be specified as hex digits");
2655         ii = sscanf(patp,
2656             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2657             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2658             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2659             &pat[13], &pat[14], &pat[15]);
2660
2661 /* xxx */
2662         if (ii > 0)
2663                 for (kk = 0;
2664                     kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii);
2665                     kk += ii)
2666                         for (jj = 0; jj < ii; ++jj)
2667                                 bp[jj + kk] = pat[jj];
2668         if (!(options & F_QUIET)) {
2669                 (void)printf("PATTERN: 0x");
2670                 for (jj = 0; jj < ii; ++jj)
2671                         (void)printf("%02x", bp[jj] & 0xFF);
2672                 (void)printf("\n");
2673         }
2674 }
2675
2676 #ifdef IPSEC
2677 #ifdef IPSEC_POLICY_IPSEC
2678 int
2679 setpolicy(int so __unused, char *policy)
2680 {
2681         char *buf;
2682
2683         if (policy == NULL)
2684                 return 0;       /* ignore */
2685
2686         buf = ipsec_set_policy(policy, strlen(policy));
2687         if (buf == NULL)
2688                 errx(1, "%s", ipsec_strerror());
2689         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2690             ipsec_get_policylen(buf)) < 0)
2691                 warnx("Unable to set IPsec policy");
2692         free(buf);
2693
2694         return 0;
2695 }
2696 #endif
2697 #endif
2698
2699 char *
2700 nigroup(char *name, int nig_oldmcprefix)
2701 {
2702         char *p;
2703         char *q;
2704         MD5_CTX ctxt;
2705         u_int8_t digest[16];
2706         u_int8_t c;
2707         size_t l;
2708         char hbuf[NI_MAXHOST];
2709         struct in6_addr in6;
2710         int valid;
2711
2712         p = strchr(name, '.');
2713         if (!p)
2714                 p = name + strlen(name);
2715         l = p - name;
2716         if (l > 63 || l > sizeof(hbuf) - 1)
2717                 return NULL;    /*label too long*/
2718         strncpy(hbuf, name, l);
2719         hbuf[(int)l] = '\0';
2720
2721         for (q = name; *q; q++) {
2722                 if (isupper(*(unsigned char *)q))
2723                         *q = tolower(*(unsigned char *)q);
2724         }
2725
2726         /* generate 16 bytes of pseudo-random value. */
2727         memset(&ctxt, 0, sizeof(ctxt));
2728         MD5Init(&ctxt);
2729         c = l & 0xff;
2730         MD5Update(&ctxt, &c, sizeof(c));
2731         MD5Update(&ctxt, (unsigned char *)name, l);
2732         MD5Final(digest, &ctxt);
2733
2734         if (nig_oldmcprefix) {
2735                 /* draft-ietf-ipngwg-icmp-name-lookup */
2736                 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
2737         } else {
2738                 /* RFC 4620 */
2739                 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
2740         }
2741         if (valid != 1)
2742                 return NULL;    /*XXX*/
2743
2744         if (nig_oldmcprefix) {
2745                 /* draft-ietf-ipngwg-icmp-name-lookup */
2746                 bcopy(digest, &in6.s6_addr[12], 4);
2747         } else {
2748                 /* RFC 4620 */
2749                 bcopy(digest, &in6.s6_addr[13], 3);
2750         }
2751
2752         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2753                 return NULL;
2754
2755         return strdup(hbuf);
2756 }
2757
2758 void
2759 usage(void)
2760 {
2761         (void)fprintf(stderr,
2762 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2763             "A"
2764 #endif
2765             "usage: ping6 [-"
2766             "Dd"
2767 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2768             "E"
2769 #endif
2770             "fH"
2771 #ifdef IPV6_USE_MIN_MTU
2772             "m"
2773 #endif
2774             "nNoqrRtvwW] "
2775             "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2776             "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2777 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2778             " [-P policy]"
2779 #endif
2780             "\n"
2781             "             [-p pattern] [-S sourceaddr] [-s packetsize] "
2782             "[-x waittime]\n"
2783             "             [-X timeout] [hops ...] host\n");
2784         exit(1);
2785 }