sbin/ping6/ping6.c

   1 /*      $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /*      BSDI    ping.c,v 2.3 1996/01/21 17:56:50 jch Exp        */
  33
  34 /*
  35  * Copyright (c) 1989, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * Mike Muuss.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. 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 static int mx_dup_ck = MAX_DUP_CHK;
 209 static char rcvd_tbl[MAX_DUP_CHK / 8];
 210
 211 static struct sockaddr_in6 dst; /* who to ping6 */
 212 static struct sockaddr_in6 src; /* src addr of this packet */
 213 static socklen_t srclen;
 214 static size_t datalen = DEFDATALEN;
 215 static int s;                   /* socket file descriptor */
 216 static u_char outpack[MAXPACKETLEN];
 217 static char BSPACE = '\b';      /* characters written for flood */
 218 static char BBELL = '\a';       /* characters written for AUDIBLE */
 219 static char DOT = '.';
 220 static char *hostname;
 221 static int ident;               /* process id to identify our packets */
 222 static u_int8_t nonce[8];       /* nonce field for node information */
 223 static int hoplimit = -1;       /* hoplimit */
 224 static u_char *packet = NULL;
 225
 226 /* counters */
 227 static long nmissedmax;         /* max value of ntransmitted - nreceived - 1 */
 228 static long npackets;           /* max packets to transmit */
 229 static long nreceived;          /* # of packets we got back */
 230 static long nrepeats;           /* number of duplicates */
 231 static long ntransmitted;       /* sequence # for outbound packets = #sent */
 232 static int interval = 1000;     /* interval between packets in ms */
 233 static int waittime = MAXWAIT;  /* timeout for each packet */
 234 static long nrcvtimeout = 0;    /* # of packets we got back after waittime */
 235
 236 /* timing */
 237 static int timing;              /* flag to do timing */
 238 static double tmin = 999999999.0;       /* minimum round trip time */
 239 static double tmax = 0.0;       /* maximum round trip time */
 240 static double tsum = 0.0;       /* sum of all times, for doing average */
 241 static double tsumsq = 0.0;     /* sum of all times squared, for std. dev. */
 242
 243 /* for node addresses */
 244 static u_short naflags;
 245
 246 /* for ancillary data(advanced API) */
 247 static struct msghdr smsghdr;
 248 static struct iovec smsgiov;
 249 static char *scmsg = 0;
 250
 251 static volatile sig_atomic_t seenint;
 252 #ifdef SIGINFO
 253 static volatile sig_atomic_t seeninfo;
 254 #endif
 255
 256 int      main(int, char *[]);
 257 static void      fill(char *, char *);
 258 static int       get_hoplim(struct msghdr *);
 259 static int       get_pathmtu(struct msghdr *);
 260 static struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
 261 static void      onsignal(int);
 262 static void      onint(int);
 263 static size_t    pingerlen(void);
 264 static int       pinger(void);
 265 static const char *pr_addr(struct sockaddr *, int);
 266 static void      pr_icmph(struct icmp6_hdr *, u_char *);
 267 static void      pr_iph(struct ip6_hdr *);
 268 static void      pr_suptypes(struct icmp6_nodeinfo *, size_t);
 269 static void      pr_nodeaddr(struct icmp6_nodeinfo *, int);
 270 static int       myechoreply(const struct icmp6_hdr *);
 271 static int       mynireply(const struct icmp6_nodeinfo *);
 272 static char *dnsdecode(const u_char **, const u_char *, const u_char *,
 273     char *, size_t);
 274 static void      pr_pack(u_char *, int, struct msghdr *);
 275 static void      pr_exthdrs(struct msghdr *);
 276 static void      pr_ip6opt(void *, size_t);
 277 static void      pr_rthdr(void *, size_t);
 278 static int       pr_bitrange(u_int32_t, int, int);
 279 static void      pr_retip(struct ip6_hdr *, u_char *);
 280 static void      summary(void);
 281 static void      tvsub(struct timeval *, struct timeval *);
 282 static int       setpolicy(int, char *);
 283 static char     *nigroup(char *, int);
 284 static void      usage(void);
 285
 286 int
 287 main(int argc, char *argv[])
 288 {
 289         struct timeval last, intvl;
 290         struct sockaddr_in6 from, *sin6;
 291         struct addrinfo hints, *res;
 292         struct sigaction si_sa;
 293         int cc, i;
 294         int almost_done, ch, hold, packlen, preload, optval, error;
 295         int nig_oldmcprefix = -1;
 296         u_char *datap;
 297         char *e, *target, *ifname = NULL, *gateway = NULL;
 298         int ip6optlen = 0;
 299         struct cmsghdr *scmsgp = NULL;
 300         /* For control (ancillary) data received from recvmsg() */
 301         struct cmsghdr cm[CONTROLLEN];
 302 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 303         u_long lsockbufsize;
 304         int sockbufsize = 0;
 305 #endif
 306         int usepktinfo = 0;
 307         struct in6_pktinfo *pktinfo = NULL;
 308 #ifdef USE_RFC2292BIS
 309         struct ip6_rthdr *rthdr = NULL;
 310 #endif
 311 #ifdef IPSEC_POLICY_IPSEC
 312         char *policy_in = NULL;
 313         char *policy_out = NULL;
 314 #endif
 315         double t;
 316         u_long alarmtimeout;
 317         size_t rthlen;
 318 #ifdef IPV6_USE_MIN_MTU
 319         int mflag = 0;
 320 #endif
 321
 322         /* just to be sure */
 323         memset(&smsghdr, 0, sizeof(smsghdr));
 324         memset(&smsgiov, 0, sizeof(smsgiov));
 325
 326         alarmtimeout = preload = 0;
 327         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 328 #ifndef IPSEC
 329 #define ADDOPTS
 330 #else
 331 #ifdef IPSEC_POLICY_IPSEC
 332 #define ADDOPTS "P:"
 333 #else
 334 #define ADDOPTS "AE"
 335 #endif /*IPSEC_POLICY_IPSEC*/
 336 #endif
 337         while ((ch = getopt(argc, argv,
 338             "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) {
 339 #undef ADDOPTS
 340                 switch (ch) {
 341                 case 'a':
 342                 {
 343                         char *cp;
 344
 345                         options &= ~F_NOUSERDATA;
 346                         options |= F_NODEADDR;
 347                         for (cp = optarg; *cp != '\0'; cp++) {
 348                                 switch (*cp) {
 349                                 case 'a':
 350                                         naflags |= NI_NODEADDR_FLAG_ALL;
 351                                         break;
 352                                 case 'c':
 353                                 case 'C':
 354                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 355                                         break;
 356                                 case 'l':
 357                                 case 'L':
 358                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 359                                         break;
 360                                 case 's':
 361                                 case 'S':
 362                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 363                                         break;
 364                                 case 'g':
 365                                 case 'G':
 366                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 367                                         break;
 368                                 case 'A': /* experimental. not in the spec */
 369 #ifdef NI_NODEADDR_FLAG_ANYCAST
 370                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 371                                         break;
 372 #else
 373                                         errx(1,
 374 "-a A is not supported on the platform");
 375                                         /*NOTREACHED*/
 376 #endif
 377                                 default:
 378                                         usage();
 379                                         /*NOTREACHED*/
 380                                 }
 381                         }
 382                         break;
 383                 }
 384                 case 'b':
 385 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 386                         errno = 0;
 387                         e = NULL;
 388                         lsockbufsize = strtoul(optarg, &e, 10);
 389                         sockbufsize = (int)lsockbufsize;
 390                         if (errno || !*optarg || *e ||
 391                             lsockbufsize > INT_MAX)
 392                                 errx(1, "invalid socket buffer size");
 393 #else
 394                         errx(1,
 395 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 396 #endif
 397                         break;
 398                 case 'c':
 399                         npackets = strtol(optarg, &e, 10);
 400                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 401                                 errx(1,
 402                                     "illegal number of packets -- %s", optarg);
 403                         break;
 404                 case 'D':
 405                         options |= F_DONTFRAG;
 406                         break;
 407                 case 'd':
 408                         options |= F_SO_DEBUG;
 409                         break;
 410                 case 'f':
 411                         if (getuid()) {
 412                                 errno = EPERM;
 413                                 errx(1, "Must be superuser to flood ping");
 414                         }
 415                         options |= F_FLOOD;
 416                         setbuf(stdout, (char *)NULL);
 417                         break;
 418                 case 'g':
 419                         gateway = optarg;
 420                         break;
 421                 case 'H':
 422                         options |= F_HOSTNAME;
 423                         break;
 424                 case 'h':               /* hoplimit */
 425                         hoplimit = strtol(optarg, &e, 10);
 426                         if (*optarg == '\0' || *e != '\0')
 427                                 errx(1, "illegal hoplimit %s", optarg);
 428                         if (255 < hoplimit || hoplimit < -1)
 429                                 errx(1,
 430                                     "illegal hoplimit -- %s", optarg);
 431                         break;
 432                 case 'I':
 433                         ifname = optarg;
 434                         options |= F_INTERFACE;
 435 #ifndef USE_SIN6_SCOPE_ID
 436                         usepktinfo++;
 437 #endif
 438                         break;
 439                 case 'i':               /* wait between sending packets */
 440                         t = strtod(optarg, &e);
 441                         if (*optarg == '\0' || *e != '\0')
 442                                 errx(1, "illegal timing interval %s", optarg);
 443                         if (t < 1 && getuid()) {
 444                                 errx(1, "%s: only root may use interval < 1s",
 445                                     strerror(EPERM));
 446                         }
 447                         intvl.tv_sec = (long)t;
 448                         intvl.tv_usec =
 449                             (long)((t - intvl.tv_sec) * 1000000);
 450                         if (intvl.tv_sec < 0)
 451                                 errx(1, "illegal timing interval %s", optarg);
 452                         /* less than 1/hz does not make sense */
 453                         if (intvl.tv_sec == 0 && intvl.tv_usec < 1) {
 454                                 warnx("too small interval, raised to .000001");
 455                                 intvl.tv_usec = 1;
 456                         }
 457                         options |= F_INTERVAL;
 458                         break;
 459                 case 'l':
 460                         if (getuid()) {
 461                                 errno = EPERM;
 462                                 errx(1, "Must be superuser to preload");
 463                         }
 464                         preload = strtol(optarg, &e, 10);
 465                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 466                                 errx(1, "illegal preload value -- %s", optarg);
 467                         break;
 468                 case 'm':
 469 #ifdef IPV6_USE_MIN_MTU
 470                         mflag++;
 471                         break;
 472 #else
 473                         errx(1, "-%c is not supported on this platform", ch);
 474                         /*NOTREACHED*/
 475 #endif
 476                 case 'n':
 477                         options &= ~F_HOSTNAME;
 478                         break;
 479                 case 'N':
 480                         options |= F_NIGROUP;
 481                         nig_oldmcprefix++;
 482                         break;
 483                 case 'o':
 484                         options |= F_ONCE;
 485                         break;
 486                 case 'p':               /* fill buffer with user pattern */
 487                         options |= F_PINGFILLED;
 488                         fill((char *)datap, optarg);
 489                                 break;
 490                 case 'q':
 491                         options |= F_QUIET;
 492                         break;
 493                 case 'r':
 494                         options |= F_AUDIBLE;
 495                         break;
 496                 case 'R':
 497                         options |= F_MISSED;
 498                         break;
 499                 case 'S':
 500                         memset(&hints, 0, sizeof(struct addrinfo));
 501                         hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
 502                         hints.ai_family = AF_INET6;
 503                         hints.ai_socktype = SOCK_RAW;
 504                         hints.ai_protocol = IPPROTO_ICMPV6;
 505
 506                         error = getaddrinfo(optarg, NULL, &hints, &res);
 507                         if (error) {
 508                                 errx(1, "invalid source address: %s",
 509                                      gai_strerror(error));
 510                         }
 511                         /*
 512                          * res->ai_family must be AF_INET6 and res->ai_addrlen
 513                          * must be sizeof(src).
 514                          */
 515                         memcpy(&src, res->ai_addr, res->ai_addrlen);
 516                         srclen = res->ai_addrlen;
 517                         freeaddrinfo(res);
 518                         options |= F_SRCADDR;
 519                         break;
 520                 case 's':               /* size of packet to send */
 521                         datalen = strtol(optarg, &e, 10);
 522                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 523                                 errx(1, "illegal datalen value -- %s", optarg);
 524                         if (datalen > MAXDATALEN) {
 525                                 errx(1,
 526                                     "datalen value too large, maximum is %d",
 527                                     MAXDATALEN);
 528                         }
 529                         break;
 530                 case 't':
 531                         options &= ~F_NOUSERDATA;
 532                         options |= F_SUPTYPES;
 533                         break;
 534                 case 'v':
 535                         options |= F_VERBOSE;
 536                         break;
 537                 case 'w':
 538                         options &= ~F_NOUSERDATA;
 539                         options |= F_FQDN;
 540                         break;
 541                 case 'W':
 542                         options &= ~F_NOUSERDATA;
 543                         options |= F_FQDNOLD;
 544                         break;
 545                 case 'x':
 546                         t = strtod(optarg, &e);
 547                         if (*e || e == optarg || t > (double)INT_MAX)
 548                                 err(EX_USAGE, "invalid timing interval: `%s'",
 549                                     optarg);
 550                         options |= F_WAITTIME;
 551                         waittime = (int)t;
 552                         break;
 553                 case 'X':
 554                         alarmtimeout = strtoul(optarg, &e, 0);
 555                         if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
 556                                 errx(EX_USAGE, "invalid timeout: `%s'",
 557                                     optarg);
 558                         if (alarmtimeout > MAXALARM)
 559                                 errx(EX_USAGE, "invalid timeout: `%s' > %d",
 560                                     optarg, MAXALARM);
 561                         alarm((int)alarmtimeout);
 562                         break;
 563 #ifdef IPSEC
 564 #ifdef IPSEC_POLICY_IPSEC
 565                 case 'P':
 566                         options |= F_POLICY;
 567                         if (!strncmp("in", optarg, 2)) {
 568                                 if ((policy_in = strdup(optarg)) == NULL)
 569                                         errx(1, "strdup");
 570                         } else if (!strncmp("out", optarg, 3)) {
 571                                 if ((policy_out = strdup(optarg)) == NULL)
 572                                         errx(1, "strdup");
 573                         } else
 574                                 errx(1, "invalid security policy");
 575                         break;
 576 #else
 577                 case 'A':
 578                         options |= F_AUTHHDR;
 579                         break;
 580                 case 'E':
 581                         options |= F_ENCRYPT;
 582                         break;
 583 #endif /*IPSEC_POLICY_IPSEC*/
 584 #endif /*IPSEC*/
 585                 default:
 586                         usage();
 587                         /*NOTREACHED*/
 588                 }
 589         }
 590
 591         argc -= optind;
 592         argv += optind;
 593
 594         if (argc < 1) {
 595                 usage();
 596                 /*NOTREACHED*/
 597         }
 598
 599         if (argc > 1) {
 600 #ifdef IPV6_RECVRTHDR   /* 2292bis */
 601                 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
 602                     argc - 1));
 603 #else  /* RFC2292 */
 604                 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
 605 #endif
 606                 if (rthlen == 0) {
 607                         errx(1, "too many intermediate hops");
 608                         /*NOTREACHED*/
 609                 }
 610                 ip6optlen += rthlen;
 611         }
 612
 613         if (options & F_NIGROUP) {
 614                 target = nigroup(argv[argc - 1], nig_oldmcprefix);
 615                 if (target == NULL) {
 616                         usage();
 617                         /*NOTREACHED*/
 618                 }
 619         } else
 620                 target = argv[argc - 1];
 621
 622         /* getaddrinfo */
 623         memset(&hints, 0, sizeof(struct addrinfo));
 624         hints.ai_flags = AI_CANONNAME;
 625         hints.ai_family = AF_INET6;
 626         hints.ai_socktype = SOCK_RAW;
 627         hints.ai_protocol = IPPROTO_ICMPV6;
 628
 629         error = getaddrinfo(target, NULL, &hints, &res);
 630         if (error)
 631                 errx(1, "%s", gai_strerror(error));
 632         if (res->ai_canonname)
 633                 hostname = strdup(res->ai_canonname);
 634         else
 635                 hostname = target;
 636
 637         if (!res->ai_addr)
 638                 errx(1, "getaddrinfo failed");
 639
 640         (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
 641
 642         if ((s = socket(res->ai_family, res->ai_socktype,
 643             res->ai_protocol)) < 0)
 644                 err(1, "socket");
 645         freeaddrinfo(res);
 646
 647         /* set the source address if specified. */
 648         if ((options & F_SRCADDR) != 0) {
 649                 /* properly fill sin6_scope_id */
 650                 if (IN6_IS_ADDR_LINKLOCAL(&src.sin6_addr) && (
 651                     IN6_IS_ADDR_LINKLOCAL(&dst.sin6_addr) ||
 652                     IN6_IS_ADDR_MC_LINKLOCAL(&dst.sin6_addr) ||
 653                     IN6_IS_ADDR_MC_NODELOCAL(&dst.sin6_addr))) {
 654                         if (src.sin6_scope_id == 0)
 655                                 src.sin6_scope_id = dst.sin6_scope_id;
 656                         if (dst.sin6_scope_id == 0)
 657                                 dst.sin6_scope_id = src.sin6_scope_id;
 658                 }
 659                 if (bind(s, (struct sockaddr *)&src, srclen) != 0)
 660                         err(1, "bind");
 661         }
 662         /* set the gateway (next hop) if specified */
 663         if (gateway) {
 664                 memset(&hints, 0, sizeof(hints));
 665                 hints.ai_family = AF_INET6;
 666                 hints.ai_socktype = SOCK_RAW;
 667                 hints.ai_protocol = IPPROTO_ICMPV6;
 668
 669                 error = getaddrinfo(gateway, NULL, &hints, &res);
 670                 if (error) {
 671                         errx(1, "getaddrinfo for the gateway %s: %s",
 672                              gateway, gai_strerror(error));
 673                 }
 674                 if (res->ai_next && (options & F_VERBOSE))
 675                         warnx("gateway resolves to multiple addresses");
 676
 677                 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
 678                     res->ai_addr, res->ai_addrlen)) {
 679                         err(1, "setsockopt(IPV6_NEXTHOP)");
 680                 }
 681
 682                 freeaddrinfo(res);
 683         }
 684
 685         /*
 686          * let the kerel pass extension headers of incoming packets,
 687          * for privileged socket options
 688          */
 689         if ((options & F_VERBOSE) != 0) {
 690                 int opton = 1;
 691
 692 #ifdef IPV6_RECVHOPOPTS
 693                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 694                     sizeof(opton)))
 695                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 696 #else  /* old adv. API */
 697                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 698                     sizeof(opton)))
 699                         err(1, "setsockopt(IPV6_HOPOPTS)");
 700 #endif
 701 #ifdef IPV6_RECVDSTOPTS
 702                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 703                     sizeof(opton)))
 704                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 705 #else  /* old adv. API */
 706                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 707                     sizeof(opton)))
 708                         err(1, "setsockopt(IPV6_DSTOPTS)");
 709 #endif
 710 #ifdef IPV6_RECVRTHDRDSTOPTS
 711                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 712                     sizeof(opton)))
 713                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 714 #endif
 715         }
 716
 717         /* revoke root privilege */
 718         if (seteuid(getuid()) != 0)
 719                 err(1, "seteuid() failed");
 720         if (setuid(getuid()) != 0)
 721                 err(1, "setuid() failed");
 722
 723         if ((options & F_FLOOD) && (options & F_INTERVAL))
 724                 errx(1, "-f and -i incompatible options");
 725
 726         if ((options & F_NOUSERDATA) == 0) {
 727                 if (datalen >= sizeof(struct tv32)) {
 728                         /* we can time transfer */
 729                         timing = 1;
 730                 } else
 731                         timing = 0;
 732                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 733                 if (options & F_VERBOSE)
 734                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 735                 else
 736                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 737         } else {
 738                 /* suppress timing for node information query */
 739                 timing = 0;
 740                 datalen = 2048;
 741                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 742         }
 743
 744         if (!(packet = (u_char *)malloc((u_int)packlen)))
 745                 err(1, "Unable to allocate packet");
 746         if (!(options & F_PINGFILLED))
 747                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 748                         *datap++ = i;
 749
 750         ident = getpid() & 0xFFFF;
 751         arc4random_buf(nonce, sizeof(nonce));
 752         optval = 1;
 753         if (options & F_DONTFRAG)
 754                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG,
 755                     &optval, sizeof(optval)) == -1)
 756                         err(1, "IPV6_DONTFRAG");
 757         hold = 1;
 758
 759         if (options & F_SO_DEBUG)
 760                 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 761                     sizeof(hold));
 762         optval = IPV6_DEFHLIM;
 763         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 764                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 765                     &optval, sizeof(optval)) == -1)
 766                         err(1, "IPV6_MULTICAST_HOPS");
 767 #ifdef IPV6_USE_MIN_MTU
 768         if (mflag != 1) {
 769                 optval = mflag > 1 ? 0 : 1;
 770
 771                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 772                     &optval, sizeof(optval)) == -1)
 773                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 774         }
 775 #ifdef IPV6_RECVPATHMTU
 776         else {
 777                 optval = 1;
 778                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 779                     &optval, sizeof(optval)) == -1)
 780                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 781         }
 782 #endif /* IPV6_RECVPATHMTU */
 783 #endif /* IPV6_USE_MIN_MTU */
 784
 785 #ifdef IPSEC
 786 #ifdef IPSEC_POLICY_IPSEC
 787         if (options & F_POLICY) {
 788                 if (setpolicy(s, policy_in) < 0)
 789                         errx(1, "%s", ipsec_strerror());
 790                 if (setpolicy(s, policy_out) < 0)
 791                         errx(1, "%s", ipsec_strerror());
 792         }
 793 #else
 794         if (options & F_AUTHHDR) {
 795                 optval = IPSEC_LEVEL_REQUIRE;
 796 #ifdef IPV6_AUTH_TRANS_LEVEL
 797                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 798                     &optval, sizeof(optval)) == -1)
 799                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 800 #else /* old def */
 801                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 802                     &optval, sizeof(optval)) == -1)
 803                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 804 #endif
 805         }
 806         if (options & F_ENCRYPT) {
 807                 optval = IPSEC_LEVEL_REQUIRE;
 808                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 809                     &optval, sizeof(optval)) == -1)
 810                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 811         }
 812 #endif /*IPSEC_POLICY_IPSEC*/
 813 #endif
 814
 815 #ifdef ICMP6_FILTER
 816     {
 817         struct icmp6_filter filt;
 818         if (!(options & F_VERBOSE)) {
 819                 ICMP6_FILTER_SETBLOCKALL(&filt);
 820                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 821                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 822                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 823                 else
 824                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 825         } else {
 826                 ICMP6_FILTER_SETPASSALL(&filt);
 827         }
 828         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 829             sizeof(filt)) < 0)
 830                 err(1, "setsockopt(ICMP6_FILTER)");
 831     }
 832 #endif /*ICMP6_FILTER*/
 833
 834         /* let the kerel pass extension headers of incoming packets */
 835         if ((options & F_VERBOSE) != 0) {
 836                 int opton = 1;
 837
 838 #ifdef IPV6_RECVRTHDR
 839                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 840                     sizeof(opton)))
 841                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 842 #else  /* old adv. API */
 843                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 844                     sizeof(opton)))
 845                         err(1, "setsockopt(IPV6_RTHDR)");
 846 #endif
 847         }
 848
 849 /*
 850         optval = 1;
 851         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 852                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 853                     &optval, sizeof(optval)) == -1)
 854                         err(1, "IPV6_MULTICAST_LOOP");
 855 */
 856
 857         /* Specify the outgoing interface and/or the source address */
 858         if (usepktinfo)
 859                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 860
 861         if (hoplimit != -1)
 862                 ip6optlen += CMSG_SPACE(sizeof(int));
 863
 864         /* set IP6 packet options */
 865         if (ip6optlen) {
 866                 if ((scmsg = (char *)malloc(ip6optlen)) == NULL)
 867                         errx(1, "can't allocate enough memory");
 868                 smsghdr.msg_control = (caddr_t)scmsg;
 869                 smsghdr.msg_controllen = ip6optlen;
 870                 scmsgp = (struct cmsghdr *)scmsg;
 871         }
 872         if (usepktinfo) {
 873                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 874                 memset(pktinfo, 0, sizeof(*pktinfo));
 875                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 876                 scmsgp->cmsg_level = IPPROTO_IPV6;
 877                 scmsgp->cmsg_type = IPV6_PKTINFO;
 878                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 879         }
 880
 881         /* set the outgoing interface */
 882         if (ifname) {
 883 #ifndef USE_SIN6_SCOPE_ID
 884                 /* pktinfo must have already been allocated */
 885                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 886                         errx(1, "%s: invalid interface name", ifname);
 887 #else
 888                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 889                         errx(1, "%s: invalid interface name", ifname);
 890 #endif
 891         }
 892         if (hoplimit != -1) {
 893                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 894                 scmsgp->cmsg_level = IPPROTO_IPV6;
 895                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 896                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 897
 898                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 899         }
 900
 901         if (argc > 1) { /* some intermediate addrs are specified */
 902                 int hops;
 903 #ifdef USE_RFC2292BIS
 904                 int rthdrlen;
 905 #endif
 906
 907 #ifdef USE_RFC2292BIS
 908                 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
 909                 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
 910                 scmsgp->cmsg_level = IPPROTO_IPV6;
 911                 scmsgp->cmsg_type = IPV6_RTHDR;
 912                 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
 913                 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
 914                     IPV6_RTHDR_TYPE_0, argc - 1);
 915                 if (rthdr == NULL)
 916                         errx(1, "can't initialize rthdr");
 917 #else  /* old advanced API */
 918                 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
 919                     IPV6_RTHDR_TYPE_0)) == NULL)
 920                         errx(1, "can't initialize rthdr");
 921 #endif /* USE_RFC2292BIS */
 922
 923                 for (hops = 0; hops < argc - 1; hops++) {
 924                         memset(&hints, 0, sizeof(hints));
 925                         hints.ai_family = AF_INET6;
 926
 927                         if ((error = getaddrinfo(argv[hops], NULL, &hints,
 928                             &res)))
 929                                 errx(1, "%s", gai_strerror(error));
 930                         if (res->ai_addr->sa_family != AF_INET6)
 931                                 errx(1,
 932                                     "bad addr family of an intermediate addr");
 933                         sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
 934 #ifdef USE_RFC2292BIS
 935                         if (inet6_rth_add(rthdr, &sin6->sin6_addr))
 936                                 errx(1, "can't add an intermediate node");
 937 #else  /* old advanced API */
 938                         if (inet6_rthdr_add(scmsg, &sin6->sin6_addr,
 939                             IPV6_RTHDR_LOOSE))
 940                                 errx(1, "can't add an intermediate node");
 941 #endif /* USE_RFC2292BIS */
 942                         freeaddrinfo(res);
 943                 }
 944
 945 #ifndef USE_RFC2292BIS
 946                 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
 947                         errx(1, "can't set the last flag");
 948 #endif
 949
 950                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 951         }
 952
 953         if (!(options & F_SRCADDR)) {
 954                 /*
 955                  * get the source address. XXX since we revoked the root
 956                  * privilege, we cannot use a raw socket for this.
 957                  */
 958                 int dummy;
 959                 socklen_t len = sizeof(src);
 960
 961                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 962                         err(1, "UDP socket");
 963
 964                 src.sin6_family = AF_INET6;
 965                 src.sin6_addr = dst.sin6_addr;
 966                 src.sin6_port = ntohs(DUMMY_PORT);
 967                 src.sin6_scope_id = dst.sin6_scope_id;
 968
 969 #ifdef USE_RFC2292BIS
 970                 if (pktinfo &&
 971                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 972                     (void *)pktinfo, sizeof(*pktinfo)))
 973                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 974
 975                 if (hoplimit != -1 &&
 976                     setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 977                     (void *)&hoplimit, sizeof(hoplimit)))
 978                         err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
 979
 980                 if (hoplimit != -1 &&
 981                     setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 982                     (void *)&hoplimit, sizeof(hoplimit)))
 983                         err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
 984
 985                 if (rthdr &&
 986                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
 987                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
 988                         err(1, "UDP setsockopt(IPV6_RTHDR)");
 989 #else  /* old advanced API */
 990                 if (smsghdr.msg_control &&
 991                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
 992                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
 993                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
 994 #endif
 995
 996                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
 997                         err(1, "UDP connect");
 998
 999                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
1000                         err(1, "getsockname");
1001
1002                 close(dummy);
1003         }
1004
1005 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
1006         if (sockbufsize) {
1007                 if (datalen > (size_t)sockbufsize)
1008                         warnx("you need -b to increase socket buffer size");
1009                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
1010                     sizeof(sockbufsize)) < 0)
1011                         err(1, "setsockopt(SO_SNDBUF)");
1012                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
1013                     sizeof(sockbufsize)) < 0)
1014                         err(1, "setsockopt(SO_RCVBUF)");
1015         }
1016         else {
1017                 if (datalen > 8 * 1024) /*XXX*/
1018                         warnx("you need -b to increase socket buffer size");
1019                 /*
1020                  * When pinging the broadcast address, you can get a lot of
1021                  * answers. Doing something so evil is useful if you are trying
1022                  * to stress the ethernet, or just want to fill the arp cache
1023                  * to get some stuff for /etc/ethers.
1024                  */
1025                 hold = 48 * 1024;
1026                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
1027                     sizeof(hold));
1028         }
1029 #endif
1030
1031         optval = 1;
1032 #ifndef USE_SIN6_SCOPE_ID
1033 #ifdef IPV6_RECVPKTINFO
1034         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
1035             sizeof(optval)) < 0)
1036                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
1037 #else  /* old adv. API */
1038         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
1039             sizeof(optval)) < 0)
1040                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
1041 #endif
1042 #endif /* USE_SIN6_SCOPE_ID */
1043 #ifdef IPV6_RECVHOPLIMIT
1044         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
1045             sizeof(optval)) < 0)
1046                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
1047 #else  /* old adv. API */
1048         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
1049             sizeof(optval)) < 0)
1050                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
1051 #endif
1052
1053         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
1054             (unsigned long)(pingerlen() - 8));
1055         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
1056         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
1057
1058         if (preload == 0)
1059                 pinger();
1060         else {
1061                 if (npackets != 0 && preload > npackets)
1062                         preload = npackets;
1063                 while (preload--)
1064                         pinger();
1065         }
1066         gettimeofday(&last, NULL);
1067
1068         sigemptyset(&si_sa.sa_mask);
1069         si_sa.sa_flags = 0;
1070         si_sa.sa_handler = onsignal;
1071         if (sigaction(SIGINT, &si_sa, 0) == -1)
1072                 err(EX_OSERR, "sigaction SIGINT");
1073         seenint = 0;
1074 #ifdef SIGINFO
1075         if (sigaction(SIGINFO, &si_sa, 0) == -1)
1076                 err(EX_OSERR, "sigaction SIGINFO");
1077         seeninfo = 0;
1078 #endif
1079         if (alarmtimeout > 0) {
1080                 if (sigaction(SIGALRM, &si_sa, 0) == -1)
1081                         err(EX_OSERR, "sigaction SIGALRM");
1082         }
1083         if (options & F_FLOOD) {
1084                 intvl.tv_sec = 0;
1085                 intvl.tv_usec = 10000;
1086         } else if ((options & F_INTERVAL) == 0) {
1087                 intvl.tv_sec = interval / 1000;
1088                 intvl.tv_usec = interval % 1000 * 1000;
1089         }
1090
1091         almost_done = 0;
1092         while (seenint == 0) {
1093                 struct timeval now, timeout;
1094                 struct msghdr m;
1095                 struct iovec iov[2];
1096                 fd_set rfds;
1097                 int n;
1098
1099                 /* signal handling */
1100                 if (seenint)
1101                         onint(SIGINT);
1102 #ifdef SIGINFO
1103                 if (seeninfo) {
1104                         summary();
1105                         seeninfo = 0;
1106                         continue;
1107                 }
1108 #endif
1109                 FD_ZERO(&rfds);
1110                 FD_SET(s, &rfds);
1111                 gettimeofday(&now, NULL);
1112                 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
1113                 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
1114                 while (timeout.tv_usec < 0) {
1115                         timeout.tv_usec += 1000000;
1116                         timeout.tv_sec--;
1117                 }
1118                 while (timeout.tv_usec > 1000000) {
1119                         timeout.tv_usec -= 1000000;
1120                         timeout.tv_sec++;
1121                 }
1122                 if (timeout.tv_sec < 0)
1123                         timeout.tv_sec = timeout.tv_usec = 0;
1124
1125                 n = select(s + 1, &rfds, NULL, NULL, &timeout);
1126                 if (n < 0)
1127                         continue;       /* EINTR */
1128                 if (n == 1) {
1129                         m.msg_name = (caddr_t)&from;
1130                         m.msg_namelen = sizeof(from);
1131                         memset(&iov, 0, sizeof(iov));
1132                         iov[0].iov_base = (caddr_t)packet;
1133                         iov[0].iov_len = packlen;
1134                         m.msg_iov = iov;
1135                         m.msg_iovlen = 1;
1136                         memset(cm, 0, CONTROLLEN);
1137                         m.msg_control = (void *)cm;
1138                         m.msg_controllen = CONTROLLEN;
1139
1140                         cc = recvmsg(s, &m, 0);
1141                         if (cc < 0) {
1142                                 if (errno != EINTR) {
1143                                         warn("recvmsg");
1144                                         sleep(1);
1145                                 }
1146                                 continue;
1147                         } else if (cc == 0) {
1148                                 int mtu;
1149
1150                                 /*
1151                                  * receive control messages only. Process the
1152                                  * exceptions (currently the only possibility is
1153                                  * a path MTU notification.)
1154                                  */
1155                                 if ((mtu = get_pathmtu(&m)) > 0) {
1156                                         if ((options & F_VERBOSE) != 0) {
1157                                                 printf("new path MTU (%d) is "
1158                                                     "notified\n", mtu);
1159                                         }
1160                                 }
1161                                 continue;
1162                         } else {
1163                                 /*
1164                                  * an ICMPv6 message (probably an echoreply)
1165                                  * arrived.
1166                                  */
1167                                 pr_pack(packet, cc, &m);
1168                         }
1169                         if (((options & F_ONCE) != 0 && nreceived > 0) ||
1170                             (npackets > 0 && nreceived >= npackets))
1171                                 break;
1172                 }
1173                 if (n == 0 || (options & F_FLOOD)) {
1174                         if (npackets == 0 || ntransmitted < npackets)
1175                                 pinger();
1176                         else {
1177                                 if (almost_done)
1178                                         break;
1179                                 almost_done = 1;
1180                         /*
1181                          * If we're not transmitting any more packets,
1182                          * change the timer to wait two round-trip times
1183                          * if we've received any packets or (waittime)
1184                          * milliseconds if we haven't.
1185                          */
1186                                 intvl.tv_usec = 0;
1187                                 if (nreceived) {
1188                                         intvl.tv_sec = 2 * tmax / 1000;
1189                                         if (intvl.tv_sec == 0)
1190                                                 intvl.tv_sec = 1;
1191                                 } else {
1192                                         intvl.tv_sec = waittime / 1000;
1193                                         intvl.tv_usec = waittime % 1000 * 1000;
1194                                 }
1195                         }
1196                         gettimeofday(&last, NULL);
1197                         if (ntransmitted - nreceived - 1 > nmissedmax) {
1198                                 nmissedmax = ntransmitted - nreceived - 1;
1199                                 if (options & F_MISSED)
1200                                         (void)write(STDOUT_FILENO, &BBELL, 1);
1201                         }
1202                 }
1203         }
1204         sigemptyset(&si_sa.sa_mask);
1205         si_sa.sa_flags = 0;
1206         si_sa.sa_handler = SIG_IGN;
1207         sigaction(SIGINT, &si_sa, 0);
1208         sigaction(SIGALRM, &si_sa, 0);
1209         summary();
1210
1211         if(packet != NULL)
1212                 free(packet);
1213
1214         exit(nreceived == 0 ? 2 : 0);
1215 }
1216
1217 static void
1218 onsignal(int sig)
1219 {
1220
1221         switch (sig) {
1222         case SIGINT:
1223         case SIGALRM:
1224                 seenint++;
1225                 break;
1226 #ifdef SIGINFO
1227         case SIGINFO:
1228                 seeninfo++;
1229                 break;
1230 #endif
1231         }
1232 }
1233
1234 /*
1235  * pinger --
1236  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1237  * will be added on by the kernel.  The ID field is our UNIX process ID,
1238  * and the sequence number is an ascending integer.  The first 8 bytes
1239  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1240  * byte-order, to compute the round-trip time.
1241  */
1242 static size_t
1243 pingerlen(void)
1244 {
1245         size_t l;
1246
1247         if (options & F_FQDN)
1248                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1249         else if (options & F_FQDNOLD)
1250                 l = ICMP6_NIQLEN;
1251         else if (options & F_NODEADDR)
1252                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1253         else if (options & F_SUPTYPES)
1254                 l = ICMP6_NIQLEN;
1255         else
1256                 l = ICMP6ECHOLEN + datalen;
1257
1258         return l;
1259 }
1260
1261 static int
1262 pinger(void)
1263 {
1264         struct icmp6_hdr *icp;
1265         struct iovec iov[2];
1266         int i, cc;
1267         struct icmp6_nodeinfo *nip;
1268         int seq;
1269
1270         if (npackets && ntransmitted >= npackets)
1271                 return(-1);     /* no more transmission */
1272
1273         icp = (struct icmp6_hdr *)outpack;
1274         nip = (struct icmp6_nodeinfo *)outpack;
1275         memset(icp, 0, sizeof(*icp));
1276         icp->icmp6_cksum = 0;
1277         seq = ntransmitted++;
1278         CLR(seq % mx_dup_ck);
1279
1280         if (options & F_FQDN) {
1281                 icp->icmp6_type = ICMP6_NI_QUERY;
1282                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1283                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1284                 nip->ni_flags = htons(0);
1285
1286                 memcpy(nip->icmp6_ni_nonce, nonce,
1287                     sizeof(nip->icmp6_ni_nonce));
1288                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1289
1290                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1291                     sizeof(dst.sin6_addr));
1292                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1293                 datalen = 0;
1294         } else if (options & F_FQDNOLD) {
1295                 /* packet format in 03 draft - no Subject data on queries */
1296                 icp->icmp6_type = ICMP6_NI_QUERY;
1297                 icp->icmp6_code = 0;    /* code field is always 0 */
1298                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1299                 nip->ni_flags = htons(0);
1300
1301                 memcpy(nip->icmp6_ni_nonce, nonce,
1302                     sizeof(nip->icmp6_ni_nonce));
1303                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1304
1305                 cc = ICMP6_NIQLEN;
1306                 datalen = 0;
1307         } else if (options & F_NODEADDR) {
1308                 icp->icmp6_type = ICMP6_NI_QUERY;
1309                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1310                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1311                 nip->ni_flags = naflags;
1312
1313                 memcpy(nip->icmp6_ni_nonce, nonce,
1314                     sizeof(nip->icmp6_ni_nonce));
1315                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1316
1317                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1318                     sizeof(dst.sin6_addr));
1319                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1320                 datalen = 0;
1321         } else if (options & F_SUPTYPES) {
1322                 icp->icmp6_type = ICMP6_NI_QUERY;
1323                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1324                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1325                 /* we support compressed bitmap */
1326                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1327
1328                 memcpy(nip->icmp6_ni_nonce, nonce,
1329                     sizeof(nip->icmp6_ni_nonce));
1330                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1331                 cc = ICMP6_NIQLEN;
1332                 datalen = 0;
1333         } else {
1334                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1335                 icp->icmp6_code = 0;
1336                 icp->icmp6_id = htons(ident);
1337                 icp->icmp6_seq = ntohs(seq);
1338                 if (timing) {
1339                         struct timeval tv;
1340                         struct tv32 *tv32;
1341                         (void)gettimeofday(&tv, NULL);
1342                         tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1343                         tv32->tv32_sec = htonl(tv.tv_sec);
1344                         tv32->tv32_usec = htonl(tv.tv_usec);
1345                 }
1346                 cc = ICMP6ECHOLEN + datalen;
1347         }
1348
1349 #ifdef DIAGNOSTIC
1350         if (pingerlen() != cc)
1351                 errx(1, "internal error; length mismatch");
1352 #endif
1353
1354         smsghdr.msg_name = (caddr_t)&dst;
1355         smsghdr.msg_namelen = sizeof(dst);
1356         memset(&iov, 0, sizeof(iov));
1357         iov[0].iov_base = (caddr_t)outpack;
1358         iov[0].iov_len = cc;
1359         smsghdr.msg_iov = iov;
1360         smsghdr.msg_iovlen = 1;
1361
1362         i = sendmsg(s, &smsghdr, 0);
1363
1364         if (i < 0 || i != cc)  {
1365                 if (i < 0)
1366                         warn("sendmsg");
1367                 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1368                     hostname, cc, i);
1369         }
1370         if (!(options & F_QUIET) && options & F_FLOOD)
1371                 (void)write(STDOUT_FILENO, &DOT, 1);
1372
1373         return(0);
1374 }
1375
1376 static int
1377 myechoreply(const struct icmp6_hdr *icp)
1378 {
1379         if (ntohs(icp->icmp6_id) == ident)
1380                 return 1;
1381         else
1382                 return 0;
1383 }
1384
1385 static int
1386 mynireply(const struct icmp6_nodeinfo *nip)
1387 {
1388         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1389             nonce + sizeof(u_int16_t),
1390             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1391                 return 1;
1392         else
1393                 return 0;
1394 }
1395
1396 static char *
1397 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1398         size_t bufsiz)
1399         /*base for compressed name*/
1400 {
1401         int i;
1402         const u_char *cp;
1403         char cresult[MAXDNAME + 1];
1404         const u_char *comp;
1405         int l;
1406
1407         cp = *sp;
1408         *buf = '\0';
1409
1410         if (cp >= ep)
1411                 return NULL;
1412         while (cp < ep) {
1413                 i = *cp;
1414                 if (i == 0 || cp != *sp) {
1415                         if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1416                                 return NULL;    /*result overrun*/
1417                 }
1418                 if (i == 0)
1419                         break;
1420                 cp++;
1421
1422                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1423                         /* DNS compression */
1424                         if (!base)
1425                                 return NULL;
1426
1427                         comp = base + (i & 0x3f);
1428                         if (dnsdecode(&comp, cp, base, cresult,
1429                             sizeof(cresult)) == NULL)
1430                                 return NULL;
1431                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1432                                 return NULL;    /*result overrun*/
1433                         break;
1434                 } else if ((i & 0x3f) == i) {
1435                         if (i > ep - cp)
1436                                 return NULL;    /*source overrun*/
1437                         while (i-- > 0 && cp < ep) {
1438                                 l = snprintf(cresult, sizeof(cresult),
1439                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1440                                 if ((size_t)l >= sizeof(cresult) || l < 0)
1441                                         return NULL;
1442                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1443                                         return NULL;    /*result overrun*/
1444                                 cp++;
1445                         }
1446                 } else
1447                         return NULL;    /*invalid label*/
1448         }
1449         if (i != 0)
1450                 return NULL;    /*not terminated*/
1451         cp++;
1452         *sp = cp;
1453         return buf;
1454 }
1455
1456 /*
1457  * pr_pack --
1458  *      Print out the packet, if it came from us.  This logic is necessary
1459  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1460  * which arrive ('tis only fair).  This permits multiple copies of this
1461  * program to be run without having intermingled output (or statistics!).
1462  */
1463 static void
1464 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1465 {
1466 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1467         struct icmp6_hdr *icp;
1468         struct icmp6_nodeinfo *ni;
1469         int i;
1470         int hoplim;
1471         struct sockaddr *from;
1472         int fromlen;
1473         u_char *cp = NULL, *dp, *end = buf + cc;
1474         struct in6_pktinfo *pktinfo = NULL;
1475         struct timeval tv, tp;
1476         struct tv32 *tpp;
1477         double triptime = 0;
1478         int dupflag;
1479         size_t off;
1480         int oldfqdn;
1481         u_int16_t seq;
1482         char dnsname[MAXDNAME + 1];
1483
1484         (void)gettimeofday(&tv, NULL);
1485
1486         if (!mhdr || !mhdr->msg_name ||
1487             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1488             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1489                 if (options & F_VERBOSE)
1490                         warnx("invalid peername");
1491                 return;
1492         }
1493         from = (struct sockaddr *)mhdr->msg_name;
1494         fromlen = mhdr->msg_namelen;
1495         if (cc < (int)sizeof(struct icmp6_hdr)) {
1496                 if (options & F_VERBOSE)
1497                         warnx("packet too short (%d bytes) from %s", cc,
1498                             pr_addr(from, fromlen));
1499                 return;
1500         }
1501         if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1502             (options & F_VERBOSE) != 0)
1503                 warnx("some control data discarded, insufficient buffer size");
1504         icp = (struct icmp6_hdr *)buf;
1505         ni = (struct icmp6_nodeinfo *)buf;
1506         off = 0;
1507
1508         if ((hoplim = get_hoplim(mhdr)) == -1) {
1509                 warnx("failed to get receiving hop limit");
1510                 return;
1511         }
1512         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1513                 warnx("failed to get receiving packet information");
1514                 return;
1515         }
1516
1517         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1518                 seq = ntohs(icp->icmp6_seq);
1519                 ++nreceived;
1520                 if (timing) {
1521                         tpp = (struct tv32 *)(icp + 1);
1522                         tp.tv_sec = ntohl(tpp->tv32_sec);
1523                         tp.tv_usec = ntohl(tpp->tv32_usec);
1524                         tvsub(&tv, &tp);
1525                         triptime = ((double)tv.tv_sec) * 1000.0 +
1526                             ((double)tv.tv_usec) / 1000.0;
1527                         tsum += triptime;
1528                         tsumsq += triptime * triptime;
1529                         if (triptime < tmin)
1530                                 tmin = triptime;
1531                         if (triptime > tmax)
1532                                 tmax = triptime;
1533                 }
1534
1535                 if (TST(seq % mx_dup_ck)) {
1536                         ++nrepeats;
1537                         --nreceived;
1538                         dupflag = 1;
1539                 } else {
1540                         SET(seq % mx_dup_ck);
1541                         dupflag = 0;
1542                 }
1543
1544                 if (options & F_QUIET)
1545                         return;
1546
1547                 if (options & F_WAITTIME && triptime > waittime) {
1548                         ++nrcvtimeout;
1549                         return;
1550                 }
1551
1552                 if (options & F_FLOOD)
1553                         (void)write(STDOUT_FILENO, &BSPACE, 1);
1554                 else {
1555                         if (options & F_AUDIBLE)
1556                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1557                         (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1558                             pr_addr(from, fromlen), seq);
1559                         (void)printf(" hlim=%d", hoplim);
1560                         if ((options & F_VERBOSE) != 0) {
1561                                 struct sockaddr_in6 dstsa;
1562
1563                                 memset(&dstsa, 0, sizeof(dstsa));
1564                                 dstsa.sin6_family = AF_INET6;
1565                                 dstsa.sin6_len = sizeof(dstsa);
1566                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1567                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1568                                 (void)printf(" dst=%s",
1569                                     pr_addr((struct sockaddr *)&dstsa,
1570                                     sizeof(dstsa)));
1571                         }
1572                         if (timing)
1573                                 (void)printf(" time=%.3f ms", triptime);
1574                         if (dupflag)
1575                                 (void)printf("(DUP!)");
1576                         /* check the data */
1577                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1578                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1579                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1580                                 if (*cp != *dp) {
1581                                         (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1582                                         break;
1583                                 }
1584                         }
1585                 }
1586         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1587                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1588                 ++nreceived;
1589                 if (TST(seq % mx_dup_ck)) {
1590                         ++nrepeats;
1591                         --nreceived;
1592                         dupflag = 1;
1593                 } else {
1594                         SET(seq % mx_dup_ck);
1595                         dupflag = 0;
1596                 }
1597
1598                 if (options & F_QUIET)
1599                         return;
1600
1601                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1602
1603                 switch (ntohs(ni->ni_code)) {
1604                 case ICMP6_NI_SUCCESS:
1605                         break;
1606                 case ICMP6_NI_REFUSED:
1607                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1608                         goto fqdnend;
1609                 case ICMP6_NI_UNKNOWN:
1610                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1611                         goto fqdnend;
1612                 default:
1613                         printf("unknown code 0x%x, type 0x%x",
1614                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1615                         goto fqdnend;
1616                 }
1617
1618                 switch (ntohs(ni->ni_qtype)) {
1619                 case NI_QTYPE_NOOP:
1620                         printf("NodeInfo NOOP");
1621                         break;
1622                 case NI_QTYPE_SUPTYPES:
1623                         pr_suptypes(ni, end - (u_char *)ni);
1624                         break;
1625                 case NI_QTYPE_NODEADDR:
1626                         pr_nodeaddr(ni, end - (u_char *)ni);
1627                         break;
1628                 case NI_QTYPE_FQDN:
1629                 default:        /* XXX: for backward compatibility */
1630                         cp = (u_char *)ni + ICMP6_NIRLEN;
1631                         if (buf[off + ICMP6_NIRLEN] ==
1632                             cc - off - ICMP6_NIRLEN - 1)
1633                                 oldfqdn = 1;
1634                         else
1635                                 oldfqdn = 0;
1636                         if (oldfqdn) {
1637                                 cp++;   /* skip length */
1638                                 while (cp < end) {
1639                                         safeputc(*cp & 0xff);
1640                                         cp++;
1641                                 }
1642                         } else {
1643                                 i = 0;
1644                                 while (cp < end) {
1645                                         if (dnsdecode((const u_char **)&cp, end,
1646                                             (const u_char *)(ni + 1), dnsname,
1647                                             sizeof(dnsname)) == NULL) {
1648                                                 printf("???");
1649                                                 break;
1650                                         }
1651                                         /*
1652                                          * name-lookup special handling for
1653                                          * truncated name
1654                                          */
1655                                         if (cp + 1 <= end && !*cp &&
1656                                             strlen(dnsname) > 0) {
1657                                                 dnsname[strlen(dnsname) - 1] = '\0';
1658                                                 cp++;
1659                                         }
1660                                         printf("%s%s", i > 0 ? "," : "",
1661                                             dnsname);
1662                                 }
1663                         }
1664                         if (options & F_VERBOSE) {
1665                                 int32_t ttl;
1666                                 int comma = 0;
1667
1668                                 (void)printf(" (");     /*)*/
1669
1670                                 switch (ni->ni_code) {
1671                                 case ICMP6_NI_REFUSED:
1672                                         (void)printf("refused");
1673                                         comma++;
1674                                         break;
1675                                 case ICMP6_NI_UNKNOWN:
1676                                         (void)printf("unknown qtype");
1677                                         comma++;
1678                                         break;
1679                                 }
1680
1681                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1682                                         /* case of refusion, unknown */
1683                                         /*(*/
1684                                         putchar(')');
1685                                         goto fqdnend;
1686                                 }
1687                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1688                                 if (comma)
1689                                         printf(",");
1690                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1691                                         (void)printf("TTL=%d:meaningless",
1692                                             (int)ttl);
1693                                 } else {
1694                                         if (ttl < 0) {
1695                                                 (void)printf("TTL=%d:invalid",
1696                                                    ttl);
1697                                         } else
1698                                                 (void)printf("TTL=%d", ttl);
1699                                 }
1700                                 comma++;
1701
1702                                 if (oldfqdn) {
1703                                         if (comma)
1704                                                 printf(",");
1705                                         printf("03 draft");
1706                                         comma++;
1707                                 } else {
1708                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1709                                         if (cp == end) {
1710                                                 if (comma)
1711                                                         printf(",");
1712                                                 printf("no name");
1713                                                 comma++;
1714                                         }
1715                                 }
1716
1717                                 if (buf[off + ICMP6_NIRLEN] !=
1718                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1719                                         if (comma)
1720                                                 printf(",");
1721                                         (void)printf("invalid namelen:%d/%lu",
1722                                             buf[off + ICMP6_NIRLEN],
1723                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1724                                         comma++;
1725                                 }
1726                                 /*(*/
1727                                 putchar(')');
1728                         }
1729                 fqdnend:
1730                         ;
1731                 }
1732         } else {
1733                 /* We've got something other than an ECHOREPLY */
1734                 if (!(options & F_VERBOSE))
1735                         return;
1736                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1737                 pr_icmph(icp, end);
1738         }
1739
1740         if (!(options & F_FLOOD)) {
1741                 (void)putchar('\n');
1742                 if (options & F_VERBOSE)
1743                         pr_exthdrs(mhdr);
1744                 (void)fflush(stdout);
1745         }
1746 #undef safeputc
1747 }
1748
1749 static void
1750 pr_exthdrs(struct msghdr *mhdr)
1751 {
1752         ssize_t bufsize;
1753         void    *bufp;
1754         struct cmsghdr *cm;
1755
1756         bufsize = 0;
1757         bufp = mhdr->msg_control;
1758         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1759              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1760                 if (cm->cmsg_level != IPPROTO_IPV6)
1761                         continue;
1762
1763                 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1764                 if (bufsize <= 0)
1765                         continue;
1766                 switch (cm->cmsg_type) {
1767                 case IPV6_HOPOPTS:
1768                         printf("  HbH Options: ");
1769                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1770                         break;
1771                 case IPV6_DSTOPTS:
1772 #ifdef IPV6_RTHDRDSTOPTS
1773                 case IPV6_RTHDRDSTOPTS:
1774 #endif
1775                         printf("  Dst Options: ");
1776                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1777                         break;
1778                 case IPV6_RTHDR:
1779                         printf("  Routing: ");
1780                         pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1781                         break;
1782                 }
1783         }
1784 }
1785
1786 #ifdef USE_RFC2292BIS
1787 static void
1788 pr_ip6opt(void *extbuf, size_t bufsize)
1789 {
1790         struct ip6_hbh *ext;
1791         int currentlen;
1792         u_int8_t type;
1793         socklen_t extlen, len;
1794         void *databuf;
1795         size_t offset;
1796         u_int16_t value2;
1797         u_int32_t value4;
1798
1799         ext = (struct ip6_hbh *)extbuf;
1800         extlen = (ext->ip6h_len + 1) * 8;
1801         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1802             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1803
1804         /*
1805          * Bounds checking on the ancillary data buffer:
1806          *     subtract the size of a cmsg structure from the buffer size.
1807          */
1808         if (bufsize < (extlen  + CMSG_SPACE(0))) {
1809                 extlen = bufsize - CMSG_SPACE(0);
1810                 warnx("options truncated, showing only %u (total=%u)",
1811                     (unsigned int)(extlen / 8 - 1),
1812                     (unsigned int)(ext->ip6h_len));
1813         }
1814
1815         currentlen = 0;
1816         while (1) {
1817                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1818                     &type, &len, &databuf);
1819                 if (currentlen == -1)
1820                         break;
1821                 switch (type) {
1822                 /*
1823                  * Note that inet6_opt_next automatically skips any padding
1824                  * optins.
1825                  */
1826                 case IP6OPT_JUMBO:
1827                         offset = 0;
1828                         offset = inet6_opt_get_val(databuf, offset,
1829                             &value4, sizeof(value4));
1830                         printf("    Jumbo Payload Opt: Length %u\n",
1831                             (u_int32_t)ntohl(value4));
1832                         break;
1833                 case IP6OPT_ROUTER_ALERT:
1834                         offset = 0;
1835                         offset = inet6_opt_get_val(databuf, offset,
1836                                                    &value2, sizeof(value2));
1837                         printf("    Router Alert Opt: Type %u\n",
1838                             ntohs(value2));
1839                         break;
1840                 default:
1841                         printf("    Received Opt %u len %lu\n",
1842                             type, (unsigned long)len);
1843                         break;
1844                 }
1845         }
1846         return;
1847 }
1848 #else  /* !USE_RFC2292BIS */
1849 /* ARGSUSED */
1850 static void
1851 pr_ip6opt(void *extbuf, size_t bufsize __unused)
1852 {
1853         putchar('\n');
1854         return;
1855 }
1856 #endif /* USE_RFC2292BIS */
1857
1858 #ifdef USE_RFC2292BIS
1859 static void
1860 pr_rthdr(void *extbuf, size_t bufsize)
1861 {
1862         struct in6_addr *in6;
1863         char ntopbuf[INET6_ADDRSTRLEN];
1864         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1865         int i, segments, origsegs, rthsize, size0, size1;
1866
1867         /* print fixed part of the header */
1868         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1869             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1870         if ((segments = inet6_rth_segments(extbuf)) >= 0) {
1871                 printf("%d segments, ", segments);
1872                 printf("%d left\n", rh->ip6r_segleft);
1873         } else {
1874                 printf("segments unknown, ");
1875                 printf("%d left\n", rh->ip6r_segleft);
1876                 return;
1877         }
1878
1879         /*
1880          * Bounds checking on the ancillary data buffer. When calculating
1881          * the number of items to show keep in mind:
1882          *      - The size of the cmsg structure
1883          *      - The size of one segment (the size of a Type 0 routing header)
1884          *      - When dividing add a fudge factor of one in case the
1885          *        dividend is not evenly divisible by the divisor
1886          */
1887         rthsize = (rh->ip6r_len + 1) * 8;
1888         if (bufsize < (rthsize + CMSG_SPACE(0))) {
1889                 origsegs = segments;
1890                 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
1891                 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
1892                 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
1893                     (size1 - size0) + 1;
1894                 warnx("segments truncated, showing only %d (total=%d)",
1895                     segments, origsegs);
1896         }
1897
1898         for (i = 0; i < segments; i++) {
1899                 in6 = inet6_rth_getaddr(extbuf, i);
1900                 if (in6 == NULL)
1901                         printf("   [%d]<NULL>\n", i);
1902                 else {
1903                         if (!inet_ntop(AF_INET6, in6, ntopbuf,
1904                             sizeof(ntopbuf)))
1905                                 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1906                         printf("   [%d]%s\n", i, ntopbuf);
1907                 }
1908         }
1909
1910         return;
1911
1912 }
1913
1914 #else  /* !USE_RFC2292BIS */
1915 /* ARGSUSED */
1916 static void
1917 pr_rthdr(void *extbuf, size_t bufsize __unused)
1918 {
1919         putchar('\n');
1920         return;
1921 }
1922 #endif /* USE_RFC2292BIS */
1923
1924 static int
1925 pr_bitrange(u_int32_t v, int soff, int ii)
1926 {
1927         int off;
1928         int i;
1929
1930         off = 0;
1931         while (off < 32) {
1932                 /* shift till we have 0x01 */
1933                 if ((v & 0x01) == 0) {
1934                         if (ii > 1)
1935                                 printf("-%u", soff + off - 1);
1936                         ii = 0;
1937                         switch (v & 0x0f) {
1938                         case 0x00:
1939                                 v >>= 4;
1940                                 off += 4;
1941                                 continue;
1942                         case 0x08:
1943                                 v >>= 3;
1944                                 off += 3;
1945                                 continue;
1946                         case 0x04: case 0x0c:
1947                                 v >>= 2;
1948                                 off += 2;
1949                                 continue;
1950                         default:
1951                                 v >>= 1;
1952                                 off += 1;
1953                                 continue;
1954                         }
1955                 }
1956
1957                 /* we have 0x01 with us */
1958                 for (i = 0; i < 32 - off; i++) {
1959                         if ((v & (0x01 << i)) == 0)
1960                                 break;
1961                 }
1962                 if (!ii)
1963                         printf(" %u", soff + off);
1964                 ii += i;
1965                 v >>= i; off += i;
1966         }
1967         return ii;
1968 }
1969
1970 static void
1971 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1972         /* ni->qtype must be SUPTYPES */
1973 {
1974         size_t clen;
1975         u_int32_t v;
1976         const u_char *cp, *end;
1977         u_int16_t cur;
1978         struct cbit {
1979                 u_int16_t words;        /*32bit count*/
1980                 u_int16_t skip;
1981         } cbit;
1982 #define MAXQTYPES       (1 << 16)
1983         size_t off;
1984         int b;
1985
1986         cp = (u_char *)(ni + 1);
1987         end = ((u_char *)ni) + nilen;
1988         cur = 0;
1989         b = 0;
1990
1991         printf("NodeInfo Supported Qtypes");
1992         if (options & F_VERBOSE) {
1993                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
1994                         printf(", compressed bitmap");
1995                 else
1996                         printf(", raw bitmap");
1997         }
1998
1999         while (cp < end) {
2000                 clen = (size_t)(end - cp);
2001                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
2002                         if (clen == 0 || clen > MAXQTYPES / 8 ||
2003                             clen % sizeof(v)) {
2004                                 printf("???");
2005                                 return;
2006                         }
2007                 } else {
2008                         if (clen < sizeof(cbit) || clen % sizeof(v))
2009                                 return;
2010                         memcpy(&cbit, cp, sizeof(cbit));
2011                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2012                             clen)
2013                                 return;
2014                         cp += sizeof(cbit);
2015                         clen = ntohs(cbit.words) * sizeof(v);
2016                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
2017                             MAXQTYPES)
2018                                 return;
2019                 }
2020
2021                 for (off = 0; off < clen; off += sizeof(v)) {
2022                         memcpy(&v, cp + off, sizeof(v));
2023                         v = (u_int32_t)ntohl(v);
2024                         b = pr_bitrange(v, (int)(cur + off * 8), b);
2025                 }
2026                 /* flush the remaining bits */
2027                 b = pr_bitrange(0, (int)(cur + off * 8), b);
2028
2029                 cp += clen;
2030                 cur += clen * 8;
2031                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2032                         cur += ntohs(cbit.skip) * 32;
2033         }
2034 }
2035
2036 static void
2037 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
2038         /* ni->qtype must be NODEADDR */
2039 {
2040         u_char *cp = (u_char *)(ni + 1);
2041         char ntop_buf[INET6_ADDRSTRLEN];
2042         int withttl = 0;
2043
2044         nilen -= sizeof(struct icmp6_nodeinfo);
2045
2046         if (options & F_VERBOSE) {
2047                 switch (ni->ni_code) {
2048                 case ICMP6_NI_REFUSED:
2049                         (void)printf("refused");
2050                         break;
2051                 case ICMP6_NI_UNKNOWN:
2052                         (void)printf("unknown qtype");
2053                         break;
2054                 }
2055                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2056                         (void)printf(" truncated");
2057         }
2058         putchar('\n');
2059         if (nilen <= 0)
2060                 printf("  no address\n");
2061
2062         /*
2063          * In icmp-name-lookups 05 and later, TTL of each returned address
2064          * is contained in the resposne. We try to detect the version
2065          * by the length of the data, but note that the detection algorithm
2066          * is incomplete. We assume the latest draft by default.
2067          */
2068         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
2069                 withttl = 1;
2070         while (nilen > 0) {
2071                 u_int32_t ttl;
2072
2073                 if (withttl) {
2074                         /* XXX: alignment? */
2075                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
2076                         cp += sizeof(u_int32_t);
2077                         nilen -= sizeof(u_int32_t);
2078                 }
2079
2080                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2081                     NULL)
2082                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2083                 printf("  %s", ntop_buf);
2084                 if (withttl) {
2085                         if (ttl == 0xffffffff) {
2086                                 /*
2087                                  * XXX: can this convention be applied to all
2088                                  * type of TTL (i.e. non-ND TTL)?
2089                                  */
2090                                 printf("(TTL=infty)");
2091                         }
2092                         else
2093                                 printf("(TTL=%u)", ttl);
2094                 }
2095                 putchar('\n');
2096
2097                 nilen -= sizeof(struct in6_addr);
2098                 cp += sizeof(struct in6_addr);
2099         }
2100 }
2101
2102 static int
2103 get_hoplim(struct msghdr *mhdr)
2104 {
2105         struct cmsghdr *cm;
2106
2107         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2108              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2109                 if (cm->cmsg_len == 0)
2110                         return(-1);
2111
2112                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2113                     cm->cmsg_type == IPV6_HOPLIMIT &&
2114                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
2115                         return(*(int *)CMSG_DATA(cm));
2116         }
2117
2118         return(-1);
2119 }
2120
2121 static struct in6_pktinfo *
2122 get_rcvpktinfo(struct msghdr *mhdr)
2123 {
2124         struct cmsghdr *cm;
2125
2126         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2127              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2128                 if (cm->cmsg_len == 0)
2129                         return(NULL);
2130
2131                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2132                     cm->cmsg_type == IPV6_PKTINFO &&
2133                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2134                         return((struct in6_pktinfo *)CMSG_DATA(cm));
2135         }
2136
2137         return(NULL);
2138 }
2139
2140 static int
2141 get_pathmtu(struct msghdr *mhdr)
2142 {
2143 #ifdef IPV6_RECVPATHMTU
2144         struct cmsghdr *cm;
2145         struct ip6_mtuinfo *mtuctl = NULL;
2146
2147         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2148              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2149                 if (cm->cmsg_len == 0)
2150                         return(0);
2151
2152                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2153                     cm->cmsg_type == IPV6_PATHMTU &&
2154                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2155                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2156
2157                         /*
2158                          * If the notified destination is different from
2159                          * the one we are pinging, just ignore the info.
2160                          * We check the scope ID only when both notified value
2161                          * and our own value have non-0 values, because we may
2162                          * have used the default scope zone ID for sending,
2163                          * in which case the scope ID value is 0.
2164                          */
2165                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2166                                                 &dst.sin6_addr) ||
2167                             (mtuctl->ip6m_addr.sin6_scope_id &&
2168                              dst.sin6_scope_id &&
2169                              mtuctl->ip6m_addr.sin6_scope_id !=
2170                              dst.sin6_scope_id)) {
2171                                 if ((options & F_VERBOSE) != 0) {
2172                                         printf("path MTU for %s is notified. "
2173                                                "(ignored)\n",
2174                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2175                                            sizeof(mtuctl->ip6m_addr)));
2176                                 }
2177                                 return(0);
2178                         }
2179
2180                         /*
2181                          * Ignore an invalid MTU. XXX: can we just believe
2182                          * the kernel check?
2183                          */
2184                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2185                                 return(0);
2186
2187                         /* notification for our destination. return the MTU. */
2188                         return((int)mtuctl->ip6m_mtu);
2189                 }
2190         }
2191 #endif
2192         return(0);
2193 }
2194
2195 /*
2196  * tvsub --
2197  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2198  * be >= in.
2199  */
2200 static void
2201 tvsub(struct timeval *out, struct timeval *in)
2202 {
2203         if ((out->tv_usec -= in->tv_usec) < 0) {
2204                 --out->tv_sec;
2205                 out->tv_usec += 1000000;
2206         }
2207         out->tv_sec -= in->tv_sec;
2208 }
2209
2210 /*
2211  * onint --
2212  *      SIGINT handler.
2213  */
2214 /* ARGSUSED */
2215 static void
2216 onint(int notused __unused)
2217 {
2218         /*
2219          * When doing reverse DNS lookups, the seenint flag might not
2220          * be noticed for a while.  Just exit if we get a second SIGINT.
2221          */
2222         if ((options & F_HOSTNAME) && seenint != 0)
2223                 _exit(nreceived ? 0 : 2);
2224 }
2225
2226 /*
2227  * summary --
2228  *      Print out statistics.
2229  */
2230 static void
2231 summary(void)
2232 {
2233
2234         (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2235         (void)printf("%ld packets transmitted, ", ntransmitted);
2236         (void)printf("%ld packets received, ", nreceived);
2237         if (nrepeats)
2238                 (void)printf("+%ld duplicates, ", nrepeats);
2239         if (ntransmitted) {
2240                 if (nreceived > ntransmitted)
2241                         (void)printf("-- somebody's duplicating packets!");
2242                 else
2243                         (void)printf("%.1f%% packet loss",
2244                             ((((double)ntransmitted - nreceived) * 100.0) /
2245                             ntransmitted));
2246         }
2247         if (nrcvtimeout)
2248                 printf(", %ld packets out of wait time", nrcvtimeout);
2249         (void)putchar('\n');
2250         if (nreceived && timing) {
2251                 /* Only display average to microseconds */
2252                 double num = nreceived + nrepeats;
2253                 double avg = tsum / num;
2254                 double dev = sqrt(tsumsq / num - avg * avg);
2255                 (void)printf(
2256                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2257                     tmin, avg, tmax, dev);
2258                 (void)fflush(stdout);
2259         }
2260         (void)fflush(stdout);
2261 }
2262
2263 /*subject type*/
2264 static const char *niqcode[] = {
2265         "IPv6 address",
2266         "DNS label",    /*or empty*/
2267         "IPv4 address",
2268 };
2269
2270 /*result code*/
2271 static const char *nircode[] = {
2272         "Success", "Refused", "Unknown",
2273 };
2274
2275
2276 /*
2277  * pr_icmph --
2278  *      Print a descriptive string about an ICMP header.
2279  */
2280 static void
2281 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2282 {
2283         char ntop_buf[INET6_ADDRSTRLEN];
2284         struct nd_redirect *red;
2285         struct icmp6_nodeinfo *ni;
2286         char dnsname[MAXDNAME + 1];
2287         const u_char *cp;
2288         size_t l;
2289
2290         switch (icp->icmp6_type) {
2291         case ICMP6_DST_UNREACH:
2292                 switch (icp->icmp6_code) {
2293                 case ICMP6_DST_UNREACH_NOROUTE:
2294                         (void)printf("No Route to Destination\n");
2295                         break;
2296                 case ICMP6_DST_UNREACH_ADMIN:
2297                         (void)printf("Destination Administratively "
2298                             "Unreachable\n");
2299                         break;
2300                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2301                         (void)printf("Destination Unreachable Beyond Scope\n");
2302                         break;
2303                 case ICMP6_DST_UNREACH_ADDR:
2304                         (void)printf("Destination Host Unreachable\n");
2305                         break;
2306                 case ICMP6_DST_UNREACH_NOPORT:
2307                         (void)printf("Destination Port Unreachable\n");
2308                         break;
2309                 default:
2310                         (void)printf("Destination Unreachable, Bad Code: %d\n",
2311                             icp->icmp6_code);
2312                         break;
2313                 }
2314                 /* Print returned IP header information */
2315                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2316                 break;
2317         case ICMP6_PACKET_TOO_BIG:
2318                 (void)printf("Packet too big mtu = %d\n",
2319                     (int)ntohl(icp->icmp6_mtu));
2320                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2321                 break;
2322         case ICMP6_TIME_EXCEEDED:
2323                 switch (icp->icmp6_code) {
2324                 case ICMP6_TIME_EXCEED_TRANSIT:
2325                         (void)printf("Time to live exceeded\n");
2326                         break;
2327                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2328                         (void)printf("Frag reassembly time exceeded\n");
2329                         break;
2330                 default:
2331                         (void)printf("Time exceeded, Bad Code: %d\n",
2332                             icp->icmp6_code);
2333                         break;
2334                 }
2335                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2336                 break;
2337         case ICMP6_PARAM_PROB:
2338                 (void)printf("Parameter problem: ");
2339                 switch (icp->icmp6_code) {
2340                 case ICMP6_PARAMPROB_HEADER:
2341                         (void)printf("Erroneous Header ");
2342                         break;
2343                 case ICMP6_PARAMPROB_NEXTHEADER:
2344                         (void)printf("Unknown Nextheader ");
2345                         break;
2346                 case ICMP6_PARAMPROB_OPTION:
2347                         (void)printf("Unrecognized Option ");
2348                         break;
2349                 default:
2350                         (void)printf("Bad code(%d) ", icp->icmp6_code);
2351                         break;
2352                 }
2353                 (void)printf("pointer = 0x%02x\n",
2354                     (u_int32_t)ntohl(icp->icmp6_pptr));
2355                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2356                 break;
2357         case ICMP6_ECHO_REQUEST:
2358                 (void)printf("Echo Request");
2359                 /* XXX ID + Seq + Data */
2360                 break;
2361         case ICMP6_ECHO_REPLY:
2362                 (void)printf("Echo Reply");
2363                 /* XXX ID + Seq + Data */
2364                 break;
2365         case ICMP6_MEMBERSHIP_QUERY:
2366                 (void)printf("Listener Query");
2367                 break;
2368         case ICMP6_MEMBERSHIP_REPORT:
2369                 (void)printf("Listener Report");
2370                 break;
2371         case ICMP6_MEMBERSHIP_REDUCTION:
2372                 (void)printf("Listener Done");
2373                 break;
2374         case ND_ROUTER_SOLICIT:
2375                 (void)printf("Router Solicitation");
2376                 break;
2377         case ND_ROUTER_ADVERT:
2378                 (void)printf("Router Advertisement");
2379                 break;
2380         case ND_NEIGHBOR_SOLICIT:
2381                 (void)printf("Neighbor Solicitation");
2382                 break;
2383         case ND_NEIGHBOR_ADVERT:
2384                 (void)printf("Neighbor Advertisement");
2385                 break;
2386         case ND_REDIRECT:
2387                 red = (struct nd_redirect *)icp;
2388                 (void)printf("Redirect\n");
2389                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2390                     sizeof(ntop_buf)))
2391                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2392                 (void)printf("Destination: %s", ntop_buf);
2393                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2394                     sizeof(ntop_buf)))
2395                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2396                 (void)printf(" New Target: %s", ntop_buf);
2397                 break;
2398         case ICMP6_NI_QUERY:
2399                 (void)printf("Node Information Query");
2400                 /* XXX ID + Seq + Data */
2401                 ni = (struct icmp6_nodeinfo *)icp;
2402                 l = end - (u_char *)(ni + 1);
2403                 printf(", ");
2404                 switch (ntohs(ni->ni_qtype)) {
2405                 case NI_QTYPE_NOOP:
2406                         (void)printf("NOOP");
2407                         break;
2408                 case NI_QTYPE_SUPTYPES:
2409                         (void)printf("Supported qtypes");
2410                         break;
2411                 case NI_QTYPE_FQDN:
2412                         (void)printf("DNS name");
2413                         break;
2414                 case NI_QTYPE_NODEADDR:
2415                         (void)printf("nodeaddr");
2416                         break;
2417                 case NI_QTYPE_IPV4ADDR:
2418                         (void)printf("IPv4 nodeaddr");
2419                         break;
2420                 default:
2421                         (void)printf("unknown qtype");
2422                         break;
2423                 }
2424                 if (options & F_VERBOSE) {
2425                         switch (ni->ni_code) {
2426                         case ICMP6_NI_SUBJ_IPV6:
2427                                 if (l == sizeof(struct in6_addr) &&
2428                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2429                                     sizeof(ntop_buf)) != NULL) {
2430                                         (void)printf(", subject=%s(%s)",
2431                                             niqcode[ni->ni_code], ntop_buf);
2432                                 } else {
2433 #if 1
2434                                         /* backward compat to -W */
2435                                         (void)printf(", oldfqdn");
2436 #else
2437                                         (void)printf(", invalid");
2438 #endif
2439                                 }
2440                                 break;
2441                         case ICMP6_NI_SUBJ_FQDN:
2442                                 if (end == (u_char *)(ni + 1)) {
2443                                         (void)printf(", no subject");
2444                                         break;
2445                                 }
2446                                 printf(", subject=%s", niqcode[ni->ni_code]);
2447                                 cp = (const u_char *)(ni + 1);
2448                                 if (dnsdecode(&cp, end, NULL, dnsname,
2449                                     sizeof(dnsname)) != NULL)
2450                                         printf("(%s)", dnsname);
2451                                 else
2452                                         printf("(invalid)");
2453                                 break;
2454                         case ICMP6_NI_SUBJ_IPV4:
2455                                 if (l == sizeof(struct in_addr) &&
2456                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2457                                     sizeof(ntop_buf)) != NULL) {
2458                                         (void)printf(", subject=%s(%s)",
2459                                             niqcode[ni->ni_code], ntop_buf);
2460                                 } else
2461                                         (void)printf(", invalid");
2462                                 break;
2463                         default:
2464                                 (void)printf(", invalid");
2465                                 break;
2466                         }
2467                 }
2468                 break;
2469         case ICMP6_NI_REPLY:
2470                 (void)printf("Node Information Reply");
2471                 /* XXX ID + Seq + Data */
2472                 ni = (struct icmp6_nodeinfo *)icp;
2473                 printf(", ");
2474                 switch (ntohs(ni->ni_qtype)) {
2475                 case NI_QTYPE_NOOP:
2476                         (void)printf("NOOP");
2477                         break;
2478                 case NI_QTYPE_SUPTYPES:
2479                         (void)printf("Supported qtypes");
2480                         break;
2481                 case NI_QTYPE_FQDN:
2482                         (void)printf("DNS name");
2483                         break;
2484                 case NI_QTYPE_NODEADDR:
2485                         (void)printf("nodeaddr");
2486                         break;
2487                 case NI_QTYPE_IPV4ADDR:
2488                         (void)printf("IPv4 nodeaddr");
2489                         break;
2490                 default:
2491                         (void)printf("unknown qtype");
2492                         break;
2493                 }
2494                 if (options & F_VERBOSE) {
2495                         if (ni->ni_code > nitems(nircode))
2496                                 printf(", invalid");
2497                         else
2498                                 printf(", %s", nircode[ni->ni_code]);
2499                 }
2500                 break;
2501         default:
2502                 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2503         }
2504 }
2505
2506 /*
2507  * pr_iph --
2508  *      Print an IP6 header.
2509  */
2510 static void
2511 pr_iph(struct ip6_hdr *ip6)
2512 {
2513         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2514         u_int8_t tc;
2515         char ntop_buf[INET6_ADDRSTRLEN];
2516
2517         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2518         tc = (tc >> 4) & 0x0f;
2519         tc |= (ip6->ip6_vfc << 4);
2520
2521         printf("Vr TC  Flow Plen Nxt Hlim\n");
2522         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2523             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2524             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2525         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2526                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2527         printf("%s->", ntop_buf);
2528         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2529                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2530         printf("%s\n", ntop_buf);
2531 }
2532
2533 /*
2534  * pr_addr --
2535  *      Return an ascii host address as a dotted quad and optionally with
2536  * a hostname.
2537  */
2538 static const char *
2539 pr_addr(struct sockaddr *addr, int addrlen)
2540 {
2541         static char buf[NI_MAXHOST];
2542         int flag = 0;
2543
2544         if ((options & F_HOSTNAME) == 0)
2545                 flag |= NI_NUMERICHOST;
2546
2547         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2548                 return (buf);
2549         else
2550                 return "?";
2551 }
2552
2553 /*
2554  * pr_retip --
2555  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2556  */
2557 static void
2558 pr_retip(struct ip6_hdr *ip6, u_char *end)
2559 {
2560         u_char *cp = (u_char *)ip6, nh;
2561         int hlen;
2562
2563         if ((size_t)(end - (u_char *)ip6) < sizeof(*ip6)) {
2564                 printf("IP6");
2565                 goto trunc;
2566         }
2567         pr_iph(ip6);
2568         hlen = sizeof(*ip6);
2569
2570         nh = ip6->ip6_nxt;
2571         cp += hlen;
2572         while (end - cp >= 8) {
2573                 switch (nh) {
2574                 case IPPROTO_HOPOPTS:
2575                         printf("HBH ");
2576                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2577                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2578                         break;
2579                 case IPPROTO_DSTOPTS:
2580                         printf("DSTOPT ");
2581                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2582                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2583                         break;
2584                 case IPPROTO_FRAGMENT:
2585                         printf("FRAG ");
2586                         hlen = sizeof(struct ip6_frag);
2587                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2588                         break;
2589                 case IPPROTO_ROUTING:
2590                         printf("RTHDR ");
2591                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2592                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2593                         break;
2594 #ifdef IPSEC
2595                 case IPPROTO_AH:
2596                         printf("AH ");
2597                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2598                         nh = ((struct ah *)cp)->ah_nxt;
2599                         break;
2600 #endif
2601                 case IPPROTO_ICMPV6:
2602                         printf("ICMP6: type = %d, code = %d\n",
2603                             *cp, *(cp + 1));
2604                         return;
2605                 case IPPROTO_ESP:
2606                         printf("ESP\n");
2607                         return;
2608                 case IPPROTO_TCP:
2609                         printf("TCP: from port %u, to port %u (decimal)\n",
2610                             (*cp * 256 + *(cp + 1)),
2611                             (*(cp + 2) * 256 + *(cp + 3)));
2612                         return;
2613                 case IPPROTO_UDP:
2614                         printf("UDP: from port %u, to port %u (decimal)\n",
2615                             (*cp * 256 + *(cp + 1)),
2616                             (*(cp + 2) * 256 + *(cp + 3)));
2617                         return;
2618                 default:
2619                         printf("Unknown Header(%d)\n", nh);
2620                         return;
2621                 }
2622
2623                 if ((cp += hlen) >= end)
2624                         goto trunc;
2625         }
2626         if (end - cp < 8)
2627                 goto trunc;
2628
2629         putchar('\n');
2630         return;
2631
2632   trunc:
2633         printf("...\n");
2634         return;
2635 }
2636
2637 static void
2638 fill(char *bp, char *patp)
2639 {
2640         int ii, jj, kk;
2641         int pat[16];
2642         char *cp;
2643
2644         for (cp = patp; *cp; cp++)
2645                 if (!isxdigit(*cp))
2646                         errx(1, "patterns must be specified as hex digits");
2647         ii = sscanf(patp,
2648             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2649             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2650             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2651             &pat[13], &pat[14], &pat[15]);
2652
2653 /* xxx */
2654         if (ii > 0)
2655                 for (kk = 0;
2656                     (size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + ii;
2657                     kk += ii)
2658                         for (jj = 0; jj < ii; ++jj)
2659                                 bp[jj + kk] = pat[jj];
2660         if (!(options & F_QUIET)) {
2661                 (void)printf("PATTERN: 0x");
2662                 for (jj = 0; jj < ii; ++jj)
2663                         (void)printf("%02x", bp[jj] & 0xFF);
2664                 (void)printf("\n");
2665         }
2666 }
2667
2668 #ifdef IPSEC
2669 #ifdef IPSEC_POLICY_IPSEC
2670 static int
2671 setpolicy(int so __unused, char *policy)
2672 {
2673         char *buf;
2674
2675         if (policy == NULL)
2676                 return 0;       /* ignore */
2677
2678         buf = ipsec_set_policy(policy, strlen(policy));
2679         if (buf == NULL)
2680                 errx(1, "%s", ipsec_strerror());
2681         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2682             ipsec_get_policylen(buf)) < 0)
2683                 warnx("Unable to set IPsec policy");
2684         free(buf);
2685
2686         return 0;
2687 }
2688 #endif
2689 #endif
2690
2691 static char *
2692 nigroup(char *name, int nig_oldmcprefix)
2693 {
2694         char *p;
2695         char *q;
2696         MD5_CTX ctxt;
2697         u_int8_t digest[16];
2698         u_int8_t c;
2699         size_t l;
2700         char hbuf[NI_MAXHOST];
2701         struct in6_addr in6;
2702         int valid;
2703
2704         p = strchr(name, '.');
2705         if (!p)
2706                 p = name + strlen(name);
2707         l = p - name;
2708         if (l > 63 || l > sizeof(hbuf) - 1)
2709                 return NULL;    /*label too long*/
2710         strncpy(hbuf, name, l);
2711         hbuf[(int)l] = '\0';
2712
2713         for (q = name; *q; q++) {
2714                 if (isupper(*(unsigned char *)q))
2715                         *q = tolower(*(unsigned char *)q);
2716         }
2717
2718         /* generate 16 bytes of pseudo-random value. */
2719         memset(&ctxt, 0, sizeof(ctxt));
2720         MD5Init(&ctxt);
2721         c = l & 0xff;
2722         MD5Update(&ctxt, &c, sizeof(c));
2723         MD5Update(&ctxt, (unsigned char *)name, l);
2724         MD5Final(digest, &ctxt);
2725
2726         if (nig_oldmcprefix) {
2727                 /* draft-ietf-ipngwg-icmp-name-lookup */
2728                 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
2729         } else {
2730                 /* RFC 4620 */
2731                 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
2732         }
2733         if (valid != 1)
2734                 return NULL;    /*XXX*/
2735
2736         if (nig_oldmcprefix) {
2737                 /* draft-ietf-ipngwg-icmp-name-lookup */
2738                 bcopy(digest, &in6.s6_addr[12], 4);
2739         } else {
2740                 /* RFC 4620 */
2741                 bcopy(digest, &in6.s6_addr[13], 3);
2742         }
2743
2744         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2745                 return NULL;
2746
2747         return strdup(hbuf);
2748 }
2749
2750 static void
2751 usage(void)
2752 {
2753         (void)fprintf(stderr,
2754 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2755             "A"
2756 #endif
2757             "usage: ping6 [-"
2758             "Dd"
2759 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2760             "E"
2761 #endif
2762             "fH"
2763 #ifdef IPV6_USE_MIN_MTU
2764             "m"
2765 #endif
2766             "nNoqrRtvwW] "
2767             "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2768             "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2769 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2770             " [-P policy]"
2771 #endif
2772             "\n"
2773             "             [-p pattern] [-S sourceaddr] [-s packetsize] "
2774             "[-x waittime]\n"
2775             "             [-X timeout] [hops ...] host\n");
2776         exit(1);
2777 }