sbin/ping6/ping6.c

   1 /*      $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /*      BSDI    ping.c,v 2.3 1996/01/21 17:56:50 jch Exp        */
  33
  34 /*
  35  * Copyright (c) 1989, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * Mike Muuss.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  */
  65
  66 #ifndef lint
  67 static const char copyright[] =
  68 "@(#) Copyright (c) 1989, 1993\n\
  69         The Regents of the University of California.  All rights reserved.\n";
  70 #endif /* not lint */
  71
  72 #ifndef lint
  73 #if 0
  74 static char sccsid[] = "@(#)ping.c      8.1 (Berkeley) 6/5/93";
  75 #endif
  76 #endif /* not lint */
  77
  78 #include <sys/cdefs.h>
  79 __FBSDID("$FreeBSD$");
  80
  81 /*
  82  * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
  83  * measure round-trip-delays and packet loss across network paths.
  84  *
  85  * Author -
  86  *      Mike Muuss
  87  *      U. S. Army Ballistic Research Laboratory
  88  *      December, 1983
  89  *
  90  * Status -
  91  *      Public Domain.  Distribution Unlimited.
  92  * Bugs -
  93  *      More statistics could always be gathered.
  94  *      This program has to run SUID to ROOT to access the ICMP socket.
  95  */
  96 /*
  97  * NOTE:
  98  * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
  99  * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
 100  * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
 101  * network attached to 1 or more interfaces)
 102  */
 103
 104 #include <sys/param.h>
 105 #include <sys/uio.h>
 106 #include <sys/socket.h>
 107 #include <sys/time.h>
 108
 109 #include <net/if.h>
 110 #include <net/route.h>
 111
 112 #include <netinet/in.h>
 113 #include <netinet/ip6.h>
 114 #include <netinet/icmp6.h>
 115 #include <arpa/inet.h>
 116 #include <arpa/nameser.h>
 117 #include <netdb.h>
 118
 119 #include <ctype.h>
 120 #include <err.h>
 121 #include <errno.h>
 122 #include <fcntl.h>
 123 #include <math.h>
 124 #include <signal.h>
 125 #include <stdio.h>
 126 #include <stdlib.h>
 127 #include <string.h>
 128 #include <sysexits.h>
 129 #include <unistd.h>
 130
 131 #ifdef IPSEC
 132 #include <netipsec/ah.h>
 133 #include <netipsec/ipsec.h>
 134 #endif
 135
 136 #include <md5.h>
 137
 138 struct tv32 {
 139         u_int32_t tv32_sec;
 140         u_int32_t tv32_usec;
 141 };
 142
 143 #define MAXPACKETLEN    131072
 144 #define IP6LEN          40
 145 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 146 #define ICMP6ECHOTMLEN sizeof(struct tv32)
 147 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 148 # define CONTROLLEN     10240   /* ancillary data buffer size RFC3542 20.1 */
 149 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 150 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 151 #define EXTRA           256     /* for AH and various other headers. weird. */
 152 #define DEFDATALEN      ICMP6ECHOTMLEN
 153 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 154 #define NROUTES         9               /* number of record route slots */
 155 #define MAXWAIT         10000           /* max ms to wait for response */
 156 #define MAXALARM        (60 * 60)       /* max seconds for alarm timeout */
 157
 158 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 159 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 160 #define SET(bit)        (A(bit) |= B(bit))
 161 #define CLR(bit)        (A(bit) &= (~B(bit)))
 162 #define TST(bit)        (A(bit) & B(bit))
 163
 164 #define F_FLOOD         0x0001
 165 #define F_INTERVAL      0x0002
 166 #define F_PINGFILLED    0x0008
 167 #define F_QUIET         0x0010
 168 #define F_RROUTE        0x0020
 169 #define F_SO_DEBUG      0x0040
 170 #define F_VERBOSE       0x0100
 171 #ifdef IPSEC
 172 #ifdef IPSEC_POLICY_IPSEC
 173 #define F_POLICY        0x0400
 174 #else
 175 #define F_AUTHHDR       0x0200
 176 #define F_ENCRYPT       0x0400
 177 #endif /*IPSEC_POLICY_IPSEC*/
 178 #endif /*IPSEC*/
 179 #define F_NODEADDR      0x0800
 180 #define F_FQDN          0x1000
 181 #define F_INTERFACE     0x2000
 182 #define F_SRCADDR       0x4000
 183 #define F_HOSTNAME      0x10000
 184 #define F_FQDNOLD       0x20000
 185 #define F_NIGROUP       0x40000
 186 #define F_SUPTYPES      0x80000
 187 #define F_NOMINMTU      0x100000
 188 #define F_ONCE          0x200000
 189 #define F_AUDIBLE       0x400000
 190 #define F_MISSED        0x800000
 191 #define F_DONTFRAG      0x1000000
 192 #define F_NOUSERDATA    (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
 193 #define F_WAITTIME      0x2000000
 194 u_int options;
 195
 196 #define IN6LEN          sizeof(struct in6_addr)
 197 #define SA6LEN          sizeof(struct sockaddr_in6)
 198 #define DUMMY_PORT      10101
 199
 200 #define SIN6(s) ((struct sockaddr_in6 *)(s))
 201
 202 /*
 203  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 204  * number of received sequence numbers we can keep track of.  Change 128
 205  * to 8192 for complete accuracy...
 206  */
 207 #define MAX_DUP_CHK     (8 * 8192)
 208 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 #ifndef HAVE_ARC4RANDOM
 292         struct timeval seed;
 293 #endif
 294         struct addrinfo hints, *res;
 295         struct sigaction si_sa;
 296         int cc, i;
 297         int almost_done, ch, hold, packlen, preload, optval, error;
 298         int nig_oldmcprefix = -1;
 299         u_char *datap;
 300         char *e, *target, *ifname = NULL, *gateway = NULL;
 301         int ip6optlen = 0;
 302         struct cmsghdr *scmsgp = NULL;
 303         /* For control (ancillary) data received from recvmsg() */
 304         struct cmsghdr cm[CONTROLLEN];
 305 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 306         u_long lsockbufsize;
 307         int sockbufsize = 0;
 308 #endif
 309         int usepktinfo = 0;
 310         struct in6_pktinfo *pktinfo = NULL;
 311 #ifdef USE_RFC2292BIS
 312         struct ip6_rthdr *rthdr = NULL;
 313 #endif
 314 #ifdef IPSEC_POLICY_IPSEC
 315         char *policy_in = NULL;
 316         char *policy_out = NULL;
 317 #endif
 318         double t;
 319         u_long alarmtimeout;
 320         size_t rthlen;
 321 #ifdef IPV6_USE_MIN_MTU
 322         int mflag = 0;
 323 #endif
 324
 325         /* just to be sure */
 326         memset(&smsghdr, 0, sizeof(smsghdr));
 327         memset(&smsgiov, 0, sizeof(smsgiov));
 328
 329         alarmtimeout = preload = 0;
 330         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 331 #ifndef IPSEC
 332 #define ADDOPTS
 333 #else
 334 #ifdef IPSEC_POLICY_IPSEC
 335 #define ADDOPTS "P:"
 336 #else
 337 #define ADDOPTS "AE"
 338 #endif /*IPSEC_POLICY_IPSEC*/
 339 #endif
 340         while ((ch = getopt(argc, argv,
 341             "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) {
 342 #undef ADDOPTS
 343                 switch (ch) {
 344                 case 'a':
 345                 {
 346                         char *cp;
 347
 348                         options &= ~F_NOUSERDATA;
 349                         options |= F_NODEADDR;
 350                         for (cp = optarg; *cp != '\0'; cp++) {
 351                                 switch (*cp) {
 352                                 case 'a':
 353                                         naflags |= NI_NODEADDR_FLAG_ALL;
 354                                         break;
 355                                 case 'c':
 356                                 case 'C':
 357                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 358                                         break;
 359                                 case 'l':
 360                                 case 'L':
 361                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 362                                         break;
 363                                 case 's':
 364                                 case 'S':
 365                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 366                                         break;
 367                                 case 'g':
 368                                 case 'G':
 369                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 370                                         break;
 371                                 case 'A': /* experimental. not in the spec */
 372 #ifdef NI_NODEADDR_FLAG_ANYCAST
 373                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 374                                         break;
 375 #else
 376                                         errx(1,
 377 "-a A is not supported on the platform");
 378                                         /*NOTREACHED*/
 379 #endif
 380                                 default:
 381                                         usage();
 382                                         /*NOTREACHED*/
 383                                 }
 384                         }
 385                         break;
 386                 }
 387                 case 'b':
 388 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 389                         errno = 0;
 390                         e = NULL;
 391                         lsockbufsize = strtoul(optarg, &e, 10);
 392                         sockbufsize = (int)lsockbufsize;
 393                         if (errno || !*optarg || *e ||
 394                             lsockbufsize > INT_MAX)
 395                                 errx(1, "invalid socket buffer size");
 396 #else
 397                         errx(1,
 398 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 399 #endif
 400                         break;
 401                 case 'c':
 402                         npackets = strtol(optarg, &e, 10);
 403                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 404                                 errx(1,
 405                                     "illegal number of packets -- %s", optarg);
 406                         break;
 407                 case 'D':
 408                         options |= F_DONTFRAG;
 409                         break;
 410                 case 'd':
 411                         options |= F_SO_DEBUG;
 412                         break;
 413                 case 'f':
 414                         if (getuid()) {
 415                                 errno = EPERM;
 416                                 errx(1, "Must be superuser to flood ping");
 417                         }
 418                         options |= F_FLOOD;
 419                         setbuf(stdout, (char *)NULL);
 420                         break;
 421                 case 'g':
 422                         gateway = optarg;
 423                         break;
 424                 case 'H':
 425                         options |= F_HOSTNAME;
 426                         break;
 427                 case 'h':               /* hoplimit */
 428                         hoplimit = strtol(optarg, &e, 10);
 429                         if (*optarg == '\0' || *e != '\0')
 430                                 errx(1, "illegal hoplimit %s", optarg);
 431                         if (255 < hoplimit || hoplimit < -1)
 432                                 errx(1,
 433                                     "illegal hoplimit -- %s", optarg);
 434                         break;
 435                 case 'I':
 436                         ifname = optarg;
 437                         options |= F_INTERFACE;
 438 #ifndef USE_SIN6_SCOPE_ID
 439                         usepktinfo++;
 440 #endif
 441                         break;
 442                 case 'i':               /* wait between sending packets */
 443                         t = strtod(optarg, &e);
 444                         if (*optarg == '\0' || *e != '\0')
 445                                 errx(1, "illegal timing interval %s", optarg);
 446                         if (t < 1 && getuid()) {
 447                                 errx(1, "%s: only root may use interval < 1s",
 448                                     strerror(EPERM));
 449                         }
 450                         intvl.tv_sec = (long)t;
 451                         intvl.tv_usec =
 452                             (long)((t - intvl.tv_sec) * 1000000);
 453                         if (intvl.tv_sec < 0)
 454                                 errx(1, "illegal timing interval %s", optarg);
 455                         /* less than 1/hz does not make sense */
 456                         if (intvl.tv_sec == 0 && intvl.tv_usec < 1) {
 457                                 warnx("too small interval, raised to .000001");
 458                                 intvl.tv_usec = 1;
 459                         }
 460                         options |= F_INTERVAL;
 461                         break;
 462                 case 'l':
 463                         if (getuid()) {
 464                                 errno = EPERM;
 465                                 errx(1, "Must be superuser to preload");
 466                         }
 467                         preload = strtol(optarg, &e, 10);
 468                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 469                                 errx(1, "illegal preload value -- %s", optarg);
 470                         break;
 471                 case 'm':
 472 #ifdef IPV6_USE_MIN_MTU
 473                         mflag++;
 474                         break;
 475 #else
 476                         errx(1, "-%c is not supported on this platform", ch);
 477                         /*NOTREACHED*/
 478 #endif
 479                 case 'n':
 480                         options &= ~F_HOSTNAME;
 481                         break;
 482                 case 'N':
 483                         options |= F_NIGROUP;
 484                         nig_oldmcprefix++;
 485                         break;
 486                 case 'o':
 487                         options |= F_ONCE;
 488                         break;
 489                 case 'p':               /* fill buffer with user pattern */
 490                         options |= F_PINGFILLED;
 491                         fill((char *)datap, optarg);
 492                                 break;
 493                 case 'q':
 494                         options |= F_QUIET;
 495                         break;
 496                 case 'r':
 497                         options |= F_AUDIBLE;
 498                         break;
 499                 case 'R':
 500                         options |= F_MISSED;
 501                         break;
 502                 case 'S':
 503                         memset(&hints, 0, sizeof(struct addrinfo));
 504                         hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
 505                         hints.ai_family = AF_INET6;
 506                         hints.ai_socktype = SOCK_RAW;
 507                         hints.ai_protocol = IPPROTO_ICMPV6;
 508
 509                         error = getaddrinfo(optarg, NULL, &hints, &res);
 510                         if (error) {
 511                                 errx(1, "invalid source address: %s",
 512                                      gai_strerror(error));
 513                         }
 514                         /*
 515                          * res->ai_family must be AF_INET6 and res->ai_addrlen
 516                          * must be sizeof(src).
 517                          */
 518                         memcpy(&src, res->ai_addr, res->ai_addrlen);
 519                         srclen = res->ai_addrlen;
 520                         freeaddrinfo(res);
 521                         res = NULL;
 522                         options |= F_SRCADDR;
 523                         break;
 524                 case 's':               /* size of packet to send */
 525                         datalen = strtol(optarg, &e, 10);
 526                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 527                                 errx(1, "illegal datalen value -- %s", optarg);
 528                         if (datalen > MAXDATALEN) {
 529                                 errx(1,
 530                                     "datalen value too large, maximum is %d",
 531                                     MAXDATALEN);
 532                         }
 533                         break;
 534                 case 't':
 535                         options &= ~F_NOUSERDATA;
 536                         options |= F_SUPTYPES;
 537                         break;
 538                 case 'v':
 539                         options |= F_VERBOSE;
 540                         break;
 541                 case 'w':
 542                         options &= ~F_NOUSERDATA;
 543                         options |= F_FQDN;
 544                         break;
 545                 case 'W':
 546                         options &= ~F_NOUSERDATA;
 547                         options |= F_FQDNOLD;
 548                         break;
 549                 case 'x':
 550                         t = strtod(optarg, &e);
 551                         if (*e || e == optarg || t > (double)INT_MAX)
 552                                 err(EX_USAGE, "invalid timing interval: `%s'",
 553                                     optarg);
 554                         options |= F_WAITTIME;
 555                         waittime = (int)t;
 556                         break;
 557                 case 'X':
 558                         alarmtimeout = strtoul(optarg, &e, 0);
 559                         if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
 560                                 errx(EX_USAGE, "invalid timeout: `%s'",
 561                                     optarg);
 562                         if (alarmtimeout > MAXALARM)
 563                                 errx(EX_USAGE, "invalid timeout: `%s' > %d",
 564                                     optarg, MAXALARM);
 565                         alarm((int)alarmtimeout);
 566                         break;
 567 #ifdef IPSEC
 568 #ifdef IPSEC_POLICY_IPSEC
 569                 case 'P':
 570                         options |= F_POLICY;
 571                         if (!strncmp("in", optarg, 2)) {
 572                                 if ((policy_in = strdup(optarg)) == NULL)
 573                                         errx(1, "strdup");
 574                         } else if (!strncmp("out", optarg, 3)) {
 575                                 if ((policy_out = strdup(optarg)) == NULL)
 576                                         errx(1, "strdup");
 577                         } else
 578                                 errx(1, "invalid security policy");
 579                         break;
 580 #else
 581                 case 'A':
 582                         options |= F_AUTHHDR;
 583                         break;
 584                 case 'E':
 585                         options |= F_ENCRYPT;
 586                         break;
 587 #endif /*IPSEC_POLICY_IPSEC*/
 588 #endif /*IPSEC*/
 589                 default:
 590                         usage();
 591                         /*NOTREACHED*/
 592                 }
 593         }
 594
 595         argc -= optind;
 596         argv += optind;
 597
 598         if (argc < 1) {
 599                 usage();
 600                 /*NOTREACHED*/
 601         }
 602
 603         if (argc > 1) {
 604 #ifdef IPV6_RECVRTHDR   /* 2292bis */
 605                 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
 606                     argc - 1));
 607 #else  /* RFC2292 */
 608                 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
 609 #endif
 610                 if (rthlen == 0) {
 611                         errx(1, "too many intermediate hops");
 612                         /*NOTREACHED*/
 613                 }
 614                 ip6optlen += rthlen;
 615         }
 616
 617         if (options & F_NIGROUP) {
 618                 target = nigroup(argv[argc - 1], nig_oldmcprefix);
 619                 if (target == NULL) {
 620                         usage();
 621                         /*NOTREACHED*/
 622                 }
 623         } else
 624                 target = argv[argc - 1];
 625
 626         /* getaddrinfo */
 627         memset(&hints, 0, sizeof(struct addrinfo));
 628         hints.ai_flags = AI_CANONNAME;
 629         hints.ai_family = AF_INET6;
 630         hints.ai_socktype = SOCK_RAW;
 631         hints.ai_protocol = IPPROTO_ICMPV6;
 632
 633         error = getaddrinfo(target, NULL, &hints, &res);
 634         if (error)
 635                 errx(1, "%s", gai_strerror(error));
 636         if (res->ai_canonname)
 637                 hostname = res->ai_canonname;
 638         else
 639                 hostname = target;
 640
 641         if (!res->ai_addr)
 642                 errx(1, "getaddrinfo failed");
 643
 644         (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
 645
 646         if ((s = socket(res->ai_family, res->ai_socktype,
 647             res->ai_protocol)) < 0)
 648                 err(1, "socket");
 649
 650         /* set the source address if specified. */
 651         if ((options & F_SRCADDR) != 0) {
 652                 /* properly fill sin6_scope_id */
 653                 if (IN6_IS_ADDR_LINKLOCAL(&src.sin6_addr) && (
 654                     IN6_IS_ADDR_LINKLOCAL(&dst.sin6_addr) ||
 655                     IN6_IS_ADDR_MC_LINKLOCAL(&dst.sin6_addr) ||
 656                     IN6_IS_ADDR_MC_NODELOCAL(&dst.sin6_addr))) {
 657                         if (src.sin6_scope_id == 0)
 658                                 src.sin6_scope_id = dst.sin6_scope_id;
 659                         if (dst.sin6_scope_id == 0)
 660                                 dst.sin6_scope_id = src.sin6_scope_id;
 661                 }
 662                 if (bind(s, (struct sockaddr *)&src, srclen) != 0)
 663                         err(1, "bind");
 664         }
 665         /* set the gateway (next hop) if specified */
 666         if (gateway) {
 667                 memset(&hints, 0, sizeof(hints));
 668                 hints.ai_family = AF_INET6;
 669                 hints.ai_socktype = SOCK_RAW;
 670                 hints.ai_protocol = IPPROTO_ICMPV6;
 671
 672                 error = getaddrinfo(gateway, NULL, &hints, &res);
 673                 if (error) {
 674                         errx(1, "getaddrinfo for the gateway %s: %s",
 675                              gateway, gai_strerror(error));
 676                 }
 677                 if (res->ai_next && (options & F_VERBOSE))
 678                         warnx("gateway resolves to multiple addresses");
 679
 680                 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
 681                     res->ai_addr, res->ai_addrlen)) {
 682                         err(1, "setsockopt(IPV6_NEXTHOP)");
 683                 }
 684
 685                 freeaddrinfo(res);
 686         }
 687
 688         /*
 689          * let the kerel pass extension headers of incoming packets,
 690          * for privileged socket options
 691          */
 692         if ((options & F_VERBOSE) != 0) {
 693                 int opton = 1;
 694
 695 #ifdef IPV6_RECVHOPOPTS
 696                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 697                     sizeof(opton)))
 698                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 699 #else  /* old adv. API */
 700                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 701                     sizeof(opton)))
 702                         err(1, "setsockopt(IPV6_HOPOPTS)");
 703 #endif
 704 #ifdef IPV6_RECVDSTOPTS
 705                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 706                     sizeof(opton)))
 707                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 708 #else  /* old adv. API */
 709                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 710                     sizeof(opton)))
 711                         err(1, "setsockopt(IPV6_DSTOPTS)");
 712 #endif
 713 #ifdef IPV6_RECVRTHDRDSTOPTS
 714                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 715                     sizeof(opton)))
 716                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 717 #endif
 718         }
 719
 720         /* revoke root privilege */
 721         if (seteuid(getuid()) != 0)
 722                 err(1, "seteuid() failed");
 723         if (setuid(getuid()) != 0)
 724                 err(1, "setuid() failed");
 725
 726         if ((options & F_FLOOD) && (options & F_INTERVAL))
 727                 errx(1, "-f and -i incompatible options");
 728
 729         if ((options & F_NOUSERDATA) == 0) {
 730                 if (datalen >= sizeof(struct tv32)) {
 731                         /* we can time transfer */
 732                         timing = 1;
 733                 } else
 734                         timing = 0;
 735                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 736                 if (options & F_VERBOSE)
 737                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 738                 else
 739                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 740         } else {
 741                 /* suppress timing for node information query */
 742                 timing = 0;
 743                 datalen = 2048;
 744                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 745         }
 746
 747         if (!(packet = (u_char *)malloc((u_int)packlen)))
 748                 err(1, "Unable to allocate packet");
 749         if (!(options & F_PINGFILLED))
 750                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 751                         *datap++ = i;
 752
 753         ident = getpid() & 0xFFFF;
 754 #ifndef HAVE_ARC4RANDOM
 755         gettimeofday(&seed, NULL);
 756         srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident));
 757         memset(nonce, 0, sizeof(nonce));
 758         for (i = 0; i < sizeof(nonce); i += sizeof(int))
 759                 *((int *)&nonce[i]) = rand();
 760 #else
 761         memset(nonce, 0, sizeof(nonce));
 762         for (i = 0; i < (int)sizeof(nonce); i += sizeof(u_int32_t))
 763                 *((u_int32_t *)&nonce[i]) = arc4random();
 764 #endif
 765         optval = 1;
 766         if (options & F_DONTFRAG)
 767                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG,
 768                     &optval, sizeof(optval)) == -1)
 769                         err(1, "IPV6_DONTFRAG");
 770         hold = 1;
 771
 772         if (options & F_SO_DEBUG)
 773                 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 774                     sizeof(hold));
 775         optval = IPV6_DEFHLIM;
 776         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 777                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 778                     &optval, sizeof(optval)) == -1)
 779                         err(1, "IPV6_MULTICAST_HOPS");
 780 #ifdef IPV6_USE_MIN_MTU
 781         if (mflag != 1) {
 782                 optval = mflag > 1 ? 0 : 1;
 783
 784                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 785                     &optval, sizeof(optval)) == -1)
 786                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 787         }
 788 #ifdef IPV6_RECVPATHMTU
 789         else {
 790                 optval = 1;
 791                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 792                     &optval, sizeof(optval)) == -1)
 793                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 794         }
 795 #endif /* IPV6_RECVPATHMTU */
 796 #endif /* IPV6_USE_MIN_MTU */
 797
 798 #ifdef IPSEC
 799 #ifdef IPSEC_POLICY_IPSEC
 800         if (options & F_POLICY) {
 801                 if (setpolicy(s, policy_in) < 0)
 802                         errx(1, "%s", ipsec_strerror());
 803                 if (setpolicy(s, policy_out) < 0)
 804                         errx(1, "%s", ipsec_strerror());
 805         }
 806 #else
 807         if (options & F_AUTHHDR) {
 808                 optval = IPSEC_LEVEL_REQUIRE;
 809 #ifdef IPV6_AUTH_TRANS_LEVEL
 810                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 811                     &optval, sizeof(optval)) == -1)
 812                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 813 #else /* old def */
 814                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 815                     &optval, sizeof(optval)) == -1)
 816                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 817 #endif
 818         }
 819         if (options & F_ENCRYPT) {
 820                 optval = IPSEC_LEVEL_REQUIRE;
 821                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 822                     &optval, sizeof(optval)) == -1)
 823                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 824         }
 825 #endif /*IPSEC_POLICY_IPSEC*/
 826 #endif
 827
 828 #ifdef ICMP6_FILTER
 829     {
 830         struct icmp6_filter filt;
 831         if (!(options & F_VERBOSE)) {
 832                 ICMP6_FILTER_SETBLOCKALL(&filt);
 833                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 834                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 835                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 836                 else
 837                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 838         } else {
 839                 ICMP6_FILTER_SETPASSALL(&filt);
 840         }
 841         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 842             sizeof(filt)) < 0)
 843                 err(1, "setsockopt(ICMP6_FILTER)");
 844     }
 845 #endif /*ICMP6_FILTER*/
 846
 847         /* let the kerel pass extension headers of incoming packets */
 848         if ((options & F_VERBOSE) != 0) {
 849                 int opton = 1;
 850
 851 #ifdef IPV6_RECVRTHDR
 852                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 853                     sizeof(opton)))
 854                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 855 #else  /* old adv. API */
 856                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 857                     sizeof(opton)))
 858                         err(1, "setsockopt(IPV6_RTHDR)");
 859 #endif
 860         }
 861
 862 /*
 863         optval = 1;
 864         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 865                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 866                     &optval, sizeof(optval)) == -1)
 867                         err(1, "IPV6_MULTICAST_LOOP");
 868 */
 869
 870         /* Specify the outgoing interface and/or the source address */
 871         if (usepktinfo)
 872                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 873
 874         if (hoplimit != -1)
 875                 ip6optlen += CMSG_SPACE(sizeof(int));
 876
 877         /* set IP6 packet options */
 878         if (ip6optlen) {
 879                 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
 880                         errx(1, "can't allocate enough memory");
 881                 smsghdr.msg_control = (caddr_t)scmsg;
 882                 smsghdr.msg_controllen = ip6optlen;
 883                 scmsgp = (struct cmsghdr *)scmsg;
 884         }
 885         if (usepktinfo) {
 886                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 887                 memset(pktinfo, 0, sizeof(*pktinfo));
 888                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 889                 scmsgp->cmsg_level = IPPROTO_IPV6;
 890                 scmsgp->cmsg_type = IPV6_PKTINFO;
 891                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 892         }
 893
 894         /* set the outgoing interface */
 895         if (ifname) {
 896 #ifndef USE_SIN6_SCOPE_ID
 897                 /* pktinfo must have already been allocated */
 898                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 899                         errx(1, "%s: invalid interface name", ifname);
 900 #else
 901                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 902                         errx(1, "%s: invalid interface name", ifname);
 903 #endif
 904         }
 905         if (hoplimit != -1) {
 906                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 907                 scmsgp->cmsg_level = IPPROTO_IPV6;
 908                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 909                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 910
 911                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 912         }
 913
 914         if (argc > 1) { /* some intermediate addrs are specified */
 915                 int hops;
 916 #ifdef USE_RFC2292BIS
 917                 int rthdrlen;
 918 #endif
 919
 920 #ifdef USE_RFC2292BIS
 921                 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
 922                 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
 923                 scmsgp->cmsg_level = IPPROTO_IPV6;
 924                 scmsgp->cmsg_type = IPV6_RTHDR;
 925                 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
 926                 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
 927                     IPV6_RTHDR_TYPE_0, argc - 1);
 928                 if (rthdr == NULL)
 929                         errx(1, "can't initialize rthdr");
 930 #else  /* old advanced API */
 931                 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
 932                     IPV6_RTHDR_TYPE_0)) == 0)
 933                         errx(1, "can't initialize rthdr");
 934 #endif /* USE_RFC2292BIS */
 935
 936                 for (hops = 0; hops < argc - 1; hops++) {
 937                         memset(&hints, 0, sizeof(hints));
 938                         hints.ai_family = AF_INET6;
 939
 940                         if ((error = getaddrinfo(argv[hops], NULL, &hints,
 941                             &res)))
 942                                 errx(1, "%s", gai_strerror(error));
 943                         if (res->ai_addr->sa_family != AF_INET6)
 944                                 errx(1,
 945                                     "bad addr family of an intermediate addr");
 946                         sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
 947 #ifdef USE_RFC2292BIS
 948                         if (inet6_rth_add(rthdr, &sin6->sin6_addr))
 949                                 errx(1, "can't add an intermediate node");
 950 #else  /* old advanced API */
 951                         if (inet6_rthdr_add(scmsg, &sin6->sin6_addr,
 952                             IPV6_RTHDR_LOOSE))
 953                                 errx(1, "can't add an intermediate node");
 954 #endif /* USE_RFC2292BIS */
 955                         freeaddrinfo(res);
 956                 }
 957
 958 #ifndef USE_RFC2292BIS
 959                 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
 960                         errx(1, "can't set the last flag");
 961 #endif
 962
 963                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 964         }
 965
 966         if (!(options & F_SRCADDR)) {
 967                 /*
 968                  * get the source address. XXX since we revoked the root
 969                  * privilege, we cannot use a raw socket for this.
 970                  */
 971                 int dummy;
 972                 socklen_t len = sizeof(src);
 973
 974                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 975                         err(1, "UDP socket");
 976
 977                 src.sin6_family = AF_INET6;
 978                 src.sin6_addr = dst.sin6_addr;
 979                 src.sin6_port = ntohs(DUMMY_PORT);
 980                 src.sin6_scope_id = dst.sin6_scope_id;
 981
 982 #ifdef USE_RFC2292BIS
 983                 if (pktinfo &&
 984                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 985                     (void *)pktinfo, sizeof(*pktinfo)))
 986                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 987
 988                 if (hoplimit != -1 &&
 989                     setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 990                     (void *)&hoplimit, sizeof(hoplimit)))
 991                         err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
 992
 993                 if (hoplimit != -1 &&
 994                     setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 995                     (void *)&hoplimit, sizeof(hoplimit)))
 996                         err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
 997
 998                 if (rthdr &&
 999                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
1000                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
1001                         err(1, "UDP setsockopt(IPV6_RTHDR)");
1002 #else  /* old advanced API */
1003                 if (smsghdr.msg_control &&
1004                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
1005                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
1006                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
1007 #endif
1008
1009                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
1010                         err(1, "UDP connect");
1011
1012                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
1013                         err(1, "getsockname");
1014
1015                 close(dummy);
1016         }
1017
1018 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
1019         if (sockbufsize) {
1020                 if (datalen > (size_t)sockbufsize)
1021                         warnx("you need -b to increase socket buffer size");
1022                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
1023                     sizeof(sockbufsize)) < 0)
1024                         err(1, "setsockopt(SO_SNDBUF)");
1025                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
1026                     sizeof(sockbufsize)) < 0)
1027                         err(1, "setsockopt(SO_RCVBUF)");
1028         }
1029         else {
1030                 if (datalen > 8 * 1024) /*XXX*/
1031                         warnx("you need -b to increase socket buffer size");
1032                 /*
1033                  * When pinging the broadcast address, you can get a lot of
1034                  * answers. Doing something so evil is useful if you are trying
1035                  * to stress the ethernet, or just want to fill the arp cache
1036                  * to get some stuff for /etc/ethers.
1037                  */
1038                 hold = 48 * 1024;
1039                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
1040                     sizeof(hold));
1041         }
1042 #endif
1043
1044         optval = 1;
1045 #ifndef USE_SIN6_SCOPE_ID
1046 #ifdef IPV6_RECVPKTINFO
1047         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
1048             sizeof(optval)) < 0)
1049                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
1050 #else  /* old adv. API */
1051         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
1052             sizeof(optval)) < 0)
1053                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
1054 #endif
1055 #endif /* USE_SIN6_SCOPE_ID */
1056 #ifdef IPV6_RECVHOPLIMIT
1057         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
1058             sizeof(optval)) < 0)
1059                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
1060 #else  /* old adv. API */
1061         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
1062             sizeof(optval)) < 0)
1063                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
1064 #endif
1065
1066         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
1067             (unsigned long)(pingerlen() - 8));
1068         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
1069         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
1070
1071         if (preload == 0)
1072                 pinger();
1073         else {
1074                 if (npackets != 0 && preload > npackets)
1075                         preload = npackets;
1076                 while (preload--)
1077                         pinger();
1078         }
1079         gettimeofday(&last, NULL);
1080
1081         sigemptyset(&si_sa.sa_mask);
1082         si_sa.sa_flags = 0;
1083         si_sa.sa_handler = onsignal;
1084         if (sigaction(SIGINT, &si_sa, 0) == -1)
1085                 err(EX_OSERR, "sigaction SIGINT");
1086         seenint = 0;
1087 #ifdef SIGINFO
1088         if (sigaction(SIGINFO, &si_sa, 0) == -1)
1089                 err(EX_OSERR, "sigaction SIGINFO");
1090         seeninfo = 0;
1091 #endif
1092         if (alarmtimeout > 0) {
1093                 if (sigaction(SIGALRM, &si_sa, 0) == -1)
1094                         err(EX_OSERR, "sigaction SIGALRM");
1095         }
1096         if (options & F_FLOOD) {
1097                 intvl.tv_sec = 0;
1098                 intvl.tv_usec = 10000;
1099         } else if ((options & F_INTERVAL) == 0) {
1100                 intvl.tv_sec = interval / 1000;
1101                 intvl.tv_usec = interval % 1000 * 1000;
1102         }
1103
1104         almost_done = 0;
1105         while (seenint == 0) {
1106                 struct timeval now, timeout;
1107                 struct msghdr m;
1108                 struct iovec iov[2];
1109                 fd_set rfds;
1110                 int n;
1111
1112                 /* signal handling */
1113                 if (seenint)
1114                         onint(SIGINT);
1115 #ifdef SIGINFO
1116                 if (seeninfo) {
1117                         summary();
1118                         seeninfo = 0;
1119                         continue;
1120                 }
1121 #endif
1122                 FD_ZERO(&rfds);
1123                 FD_SET(s, &rfds);
1124                 gettimeofday(&now, NULL);
1125                 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
1126                 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
1127                 while (timeout.tv_usec < 0) {
1128                         timeout.tv_usec += 1000000;
1129                         timeout.tv_sec--;
1130                 }
1131                 while (timeout.tv_usec > 1000000) {
1132                         timeout.tv_usec -= 1000000;
1133                         timeout.tv_sec++;
1134                 }
1135                 if (timeout.tv_sec < 0)
1136                         timeout.tv_sec = timeout.tv_usec = 0;
1137
1138                 n = select(s + 1, &rfds, NULL, NULL, &timeout);
1139                 if (n < 0)
1140                         continue;       /* EINTR */
1141                 if (n == 1) {
1142                         m.msg_name = (caddr_t)&from;
1143                         m.msg_namelen = sizeof(from);
1144                         memset(&iov, 0, sizeof(iov));
1145                         iov[0].iov_base = (caddr_t)packet;
1146                         iov[0].iov_len = packlen;
1147                         m.msg_iov = iov;
1148                         m.msg_iovlen = 1;
1149                         memset(cm, 0, CONTROLLEN);
1150                         m.msg_control = (void *)cm;
1151                         m.msg_controllen = CONTROLLEN;
1152
1153                         cc = recvmsg(s, &m, 0);
1154                         if (cc < 0) {
1155                                 if (errno != EINTR) {
1156                                         warn("recvmsg");
1157                                         sleep(1);
1158                                 }
1159                                 continue;
1160                         } else if (cc == 0) {
1161                                 int mtu;
1162
1163                                 /*
1164                                  * receive control messages only. Process the
1165                                  * exceptions (currently the only possibility is
1166                                  * a path MTU notification.)
1167                                  */
1168                                 if ((mtu = get_pathmtu(&m)) > 0) {
1169                                         if ((options & F_VERBOSE) != 0) {
1170                                                 printf("new path MTU (%d) is "
1171                                                     "notified\n", mtu);
1172                                         }
1173                                 }
1174                                 continue;
1175                         } else {
1176                                 /*
1177                                  * an ICMPv6 message (probably an echoreply)
1178                                  * arrived.
1179                                  */
1180                                 pr_pack(packet, cc, &m);
1181                         }
1182                         if (((options & F_ONCE) != 0 && nreceived > 0) ||
1183                             (npackets > 0 && nreceived >= npackets))
1184                                 break;
1185                 }
1186                 if (n == 0 || (options & F_FLOOD)) {
1187                         if (npackets == 0 || ntransmitted < npackets)
1188                                 pinger();
1189                         else {
1190                                 if (almost_done)
1191                                         break;
1192                                 almost_done = 1;
1193                         /*
1194                          * If we're not transmitting any more packets,
1195                          * change the timer to wait two round-trip times
1196                          * if we've received any packets or (waittime)
1197                          * milliseconds if we haven't.
1198                          */
1199                                 intvl.tv_usec = 0;
1200                                 if (nreceived) {
1201                                         intvl.tv_sec = 2 * tmax / 1000;
1202                                         if (intvl.tv_sec == 0)
1203                                                 intvl.tv_sec = 1;
1204                                 } else {
1205                                         intvl.tv_sec = waittime / 1000;
1206                                         intvl.tv_usec = waittime % 1000 * 1000;
1207                                 }
1208                         }
1209                         gettimeofday(&last, NULL);
1210                         if (ntransmitted - nreceived - 1 > nmissedmax) {
1211                                 nmissedmax = ntransmitted - nreceived - 1;
1212                                 if (options & F_MISSED)
1213                                         (void)write(STDOUT_FILENO, &BBELL, 1);
1214                         }
1215                 }
1216         }
1217         sigemptyset(&si_sa.sa_mask);
1218         si_sa.sa_flags = 0;
1219         si_sa.sa_handler = SIG_IGN;
1220         sigaction(SIGINT, &si_sa, 0);
1221         sigaction(SIGALRM, &si_sa, 0);
1222         summary();
1223
1224         if (res != NULL)
1225                 freeaddrinfo(res);
1226
1227         if(packet != NULL)
1228                 free(packet);
1229
1230         exit(nreceived == 0 ? 2 : 0);
1231 }
1232
1233 static void
1234 onsignal(int sig)
1235 {
1236
1237         switch (sig) {
1238         case SIGINT:
1239         case SIGALRM:
1240                 seenint++;
1241                 break;
1242 #ifdef SIGINFO
1243         case SIGINFO:
1244                 seeninfo++;
1245                 break;
1246 #endif
1247         }
1248 }
1249
1250 /*
1251  * pinger --
1252  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1253  * will be added on by the kernel.  The ID field is our UNIX process ID,
1254  * and the sequence number is an ascending integer.  The first 8 bytes
1255  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1256  * byte-order, to compute the round-trip time.
1257  */
1258 static size_t
1259 pingerlen(void)
1260 {
1261         size_t l;
1262
1263         if (options & F_FQDN)
1264                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1265         else if (options & F_FQDNOLD)
1266                 l = ICMP6_NIQLEN;
1267         else if (options & F_NODEADDR)
1268                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1269         else if (options & F_SUPTYPES)
1270                 l = ICMP6_NIQLEN;
1271         else
1272                 l = ICMP6ECHOLEN + datalen;
1273
1274         return l;
1275 }
1276
1277 static int
1278 pinger(void)
1279 {
1280         struct icmp6_hdr *icp;
1281         struct iovec iov[2];
1282         int i, cc;
1283         struct icmp6_nodeinfo *nip;
1284         int seq;
1285
1286         if (npackets && ntransmitted >= npackets)
1287                 return(-1);     /* no more transmission */
1288
1289         icp = (struct icmp6_hdr *)outpack;
1290         nip = (struct icmp6_nodeinfo *)outpack;
1291         memset(icp, 0, sizeof(*icp));
1292         icp->icmp6_cksum = 0;
1293         seq = ntransmitted++;
1294         CLR(seq % mx_dup_ck);
1295
1296         if (options & F_FQDN) {
1297                 icp->icmp6_type = ICMP6_NI_QUERY;
1298                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1299                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1300                 nip->ni_flags = htons(0);
1301
1302                 memcpy(nip->icmp6_ni_nonce, nonce,
1303                     sizeof(nip->icmp6_ni_nonce));
1304                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1305
1306                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1307                     sizeof(dst.sin6_addr));
1308                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1309                 datalen = 0;
1310         } else if (options & F_FQDNOLD) {
1311                 /* packet format in 03 draft - no Subject data on queries */
1312                 icp->icmp6_type = ICMP6_NI_QUERY;
1313                 icp->icmp6_code = 0;    /* code field is always 0 */
1314                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1315                 nip->ni_flags = htons(0);
1316
1317                 memcpy(nip->icmp6_ni_nonce, nonce,
1318                     sizeof(nip->icmp6_ni_nonce));
1319                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1320
1321                 cc = ICMP6_NIQLEN;
1322                 datalen = 0;
1323         } else if (options & F_NODEADDR) {
1324                 icp->icmp6_type = ICMP6_NI_QUERY;
1325                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1326                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1327                 nip->ni_flags = naflags;
1328
1329                 memcpy(nip->icmp6_ni_nonce, nonce,
1330                     sizeof(nip->icmp6_ni_nonce));
1331                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1332
1333                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1334                     sizeof(dst.sin6_addr));
1335                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1336                 datalen = 0;
1337         } else if (options & F_SUPTYPES) {
1338                 icp->icmp6_type = ICMP6_NI_QUERY;
1339                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1340                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1341                 /* we support compressed bitmap */
1342                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1343
1344                 memcpy(nip->icmp6_ni_nonce, nonce,
1345                     sizeof(nip->icmp6_ni_nonce));
1346                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1347                 cc = ICMP6_NIQLEN;
1348                 datalen = 0;
1349         } else {
1350                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1351                 icp->icmp6_code = 0;
1352                 icp->icmp6_id = htons(ident);
1353                 icp->icmp6_seq = ntohs(seq);
1354                 if (timing) {
1355                         struct timeval tv;
1356                         struct tv32 *tv32;
1357                         (void)gettimeofday(&tv, NULL);
1358                         tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1359                         tv32->tv32_sec = htonl(tv.tv_sec);
1360                         tv32->tv32_usec = htonl(tv.tv_usec);
1361                 }
1362                 cc = ICMP6ECHOLEN + datalen;
1363         }
1364
1365 #ifdef DIAGNOSTIC
1366         if (pingerlen() != cc)
1367                 errx(1, "internal error; length mismatch");
1368 #endif
1369
1370         smsghdr.msg_name = (caddr_t)&dst;
1371         smsghdr.msg_namelen = sizeof(dst);
1372         memset(&iov, 0, sizeof(iov));
1373         iov[0].iov_base = (caddr_t)outpack;
1374         iov[0].iov_len = cc;
1375         smsghdr.msg_iov = iov;
1376         smsghdr.msg_iovlen = 1;
1377
1378         i = sendmsg(s, &smsghdr, 0);
1379
1380         if (i < 0 || i != cc)  {
1381                 if (i < 0)
1382                         warn("sendmsg");
1383                 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1384                     hostname, cc, i);
1385         }
1386         if (!(options & F_QUIET) && options & F_FLOOD)
1387                 (void)write(STDOUT_FILENO, &DOT, 1);
1388
1389         return(0);
1390 }
1391
1392 static int
1393 myechoreply(const struct icmp6_hdr *icp)
1394 {
1395         if (ntohs(icp->icmp6_id) == ident)
1396                 return 1;
1397         else
1398                 return 0;
1399 }
1400
1401 static int
1402 mynireply(const struct icmp6_nodeinfo *nip)
1403 {
1404         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1405             nonce + sizeof(u_int16_t),
1406             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1407                 return 1;
1408         else
1409                 return 0;
1410 }
1411
1412 static char *
1413 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1414         size_t bufsiz)
1415         /*base for compressed name*/
1416 {
1417         int i;
1418         const u_char *cp;
1419         char cresult[MAXDNAME + 1];
1420         const u_char *comp;
1421         int l;
1422
1423         cp = *sp;
1424         *buf = '\0';
1425
1426         if (cp >= ep)
1427                 return NULL;
1428         while (cp < ep) {
1429                 i = *cp;
1430                 if (i == 0 || cp != *sp) {
1431                         if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1432                                 return NULL;    /*result overrun*/
1433                 }
1434                 if (i == 0)
1435                         break;
1436                 cp++;
1437
1438                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1439                         /* DNS compression */
1440                         if (!base)
1441                                 return NULL;
1442
1443                         comp = base + (i & 0x3f);
1444                         if (dnsdecode(&comp, cp, base, cresult,
1445                             sizeof(cresult)) == NULL)
1446                                 return NULL;
1447                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1448                                 return NULL;    /*result overrun*/
1449                         break;
1450                 } else if ((i & 0x3f) == i) {
1451                         if (i > ep - cp)
1452                                 return NULL;    /*source overrun*/
1453                         while (i-- > 0 && cp < ep) {
1454                                 l = snprintf(cresult, sizeof(cresult),
1455                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1456                                 if ((size_t)l >= sizeof(cresult) || l < 0)
1457                                         return NULL;
1458                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1459                                         return NULL;    /*result overrun*/
1460                                 cp++;
1461                         }
1462                 } else
1463                         return NULL;    /*invalid label*/
1464         }
1465         if (i != 0)
1466                 return NULL;    /*not terminated*/
1467         cp++;
1468         *sp = cp;
1469         return buf;
1470 }
1471
1472 /*
1473  * pr_pack --
1474  *      Print out the packet, if it came from us.  This logic is necessary
1475  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1476  * which arrive ('tis only fair).  This permits multiple copies of this
1477  * program to be run without having intermingled output (or statistics!).
1478  */
1479 static void
1480 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1481 {
1482 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1483         struct icmp6_hdr *icp;
1484         struct icmp6_nodeinfo *ni;
1485         int i;
1486         int hoplim;
1487         struct sockaddr *from;
1488         int fromlen;
1489         u_char *cp = NULL, *dp, *end = buf + cc;
1490         struct in6_pktinfo *pktinfo = NULL;
1491         struct timeval tv, tp;
1492         struct tv32 *tpp;
1493         double triptime = 0;
1494         int dupflag;
1495         size_t off;
1496         int oldfqdn;
1497         u_int16_t seq;
1498         char dnsname[MAXDNAME + 1];
1499
1500         (void)gettimeofday(&tv, NULL);
1501
1502         if (!mhdr || !mhdr->msg_name ||
1503             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1504             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1505                 if (options & F_VERBOSE)
1506                         warnx("invalid peername");
1507                 return;
1508         }
1509         from = (struct sockaddr *)mhdr->msg_name;
1510         fromlen = mhdr->msg_namelen;
1511         if (cc < (int)sizeof(struct icmp6_hdr)) {
1512                 if (options & F_VERBOSE)
1513                         warnx("packet too short (%d bytes) from %s", cc,
1514                             pr_addr(from, fromlen));
1515                 return;
1516         }
1517         if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1518             (options & F_VERBOSE) != 0)
1519                 warnx("some control data discarded, insufficient buffer size");
1520         icp = (struct icmp6_hdr *)buf;
1521         ni = (struct icmp6_nodeinfo *)buf;
1522         off = 0;
1523
1524         if ((hoplim = get_hoplim(mhdr)) == -1) {
1525                 warnx("failed to get receiving hop limit");
1526                 return;
1527         }
1528         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1529                 warnx("failed to get receiving packet information");
1530                 return;
1531         }
1532
1533         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1534                 seq = ntohs(icp->icmp6_seq);
1535                 ++nreceived;
1536                 if (timing) {
1537                         tpp = (struct tv32 *)(icp + 1);
1538                         tp.tv_sec = ntohl(tpp->tv32_sec);
1539                         tp.tv_usec = ntohl(tpp->tv32_usec);
1540                         tvsub(&tv, &tp);
1541                         triptime = ((double)tv.tv_sec) * 1000.0 +
1542                             ((double)tv.tv_usec) / 1000.0;
1543                         tsum += triptime;
1544                         tsumsq += triptime * triptime;
1545                         if (triptime < tmin)
1546                                 tmin = triptime;
1547                         if (triptime > tmax)
1548                                 tmax = triptime;
1549                 }
1550
1551                 if (TST(seq % mx_dup_ck)) {
1552                         ++nrepeats;
1553                         --nreceived;
1554                         dupflag = 1;
1555                 } else {
1556                         SET(seq % mx_dup_ck);
1557                         dupflag = 0;
1558                 }
1559
1560                 if (options & F_QUIET)
1561                         return;
1562
1563                 if (options & F_WAITTIME && triptime > waittime) {
1564                         ++nrcvtimeout;
1565                         return;
1566                 }
1567
1568                 if (options & F_FLOOD)
1569                         (void)write(STDOUT_FILENO, &BSPACE, 1);
1570                 else {
1571                         if (options & F_AUDIBLE)
1572                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1573                         (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1574                             pr_addr(from, fromlen), seq);
1575                         (void)printf(" hlim=%d", hoplim);
1576                         if ((options & F_VERBOSE) != 0) {
1577                                 struct sockaddr_in6 dstsa;
1578
1579                                 memset(&dstsa, 0, sizeof(dstsa));
1580                                 dstsa.sin6_family = AF_INET6;
1581                                 dstsa.sin6_len = sizeof(dstsa);
1582                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1583                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1584                                 (void)printf(" dst=%s",
1585                                     pr_addr((struct sockaddr *)&dstsa,
1586                                     sizeof(dstsa)));
1587                         }
1588                         if (timing)
1589                                 (void)printf(" time=%.3f ms", triptime);
1590                         if (dupflag)
1591                                 (void)printf("(DUP!)");
1592                         /* check the data */
1593                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1594                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1595                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1596                                 if (*cp != *dp) {
1597                                         (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1598                                         break;
1599                                 }
1600                         }
1601                 }
1602         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1603                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1604                 ++nreceived;
1605                 if (TST(seq % mx_dup_ck)) {
1606                         ++nrepeats;
1607                         --nreceived;
1608                         dupflag = 1;
1609                 } else {
1610                         SET(seq % mx_dup_ck);
1611                         dupflag = 0;
1612                 }
1613
1614                 if (options & F_QUIET)
1615                         return;
1616
1617                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1618
1619                 switch (ntohs(ni->ni_code)) {
1620                 case ICMP6_NI_SUCCESS:
1621                         break;
1622                 case ICMP6_NI_REFUSED:
1623                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1624                         goto fqdnend;
1625                 case ICMP6_NI_UNKNOWN:
1626                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1627                         goto fqdnend;
1628                 default:
1629                         printf("unknown code 0x%x, type 0x%x",
1630                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1631                         goto fqdnend;
1632                 }
1633
1634                 switch (ntohs(ni->ni_qtype)) {
1635                 case NI_QTYPE_NOOP:
1636                         printf("NodeInfo NOOP");
1637                         break;
1638                 case NI_QTYPE_SUPTYPES:
1639                         pr_suptypes(ni, end - (u_char *)ni);
1640                         break;
1641                 case NI_QTYPE_NODEADDR:
1642                         pr_nodeaddr(ni, end - (u_char *)ni);
1643                         break;
1644                 case NI_QTYPE_FQDN:
1645                 default:        /* XXX: for backward compatibility */
1646                         cp = (u_char *)ni + ICMP6_NIRLEN;
1647                         if (buf[off + ICMP6_NIRLEN] ==
1648                             cc - off - ICMP6_NIRLEN - 1)
1649                                 oldfqdn = 1;
1650                         else
1651                                 oldfqdn = 0;
1652                         if (oldfqdn) {
1653                                 cp++;   /* skip length */
1654                                 while (cp < end) {
1655                                         safeputc(*cp & 0xff);
1656                                         cp++;
1657                                 }
1658                         } else {
1659                                 i = 0;
1660                                 while (cp < end) {
1661                                         if (dnsdecode((const u_char **)&cp, end,
1662                                             (const u_char *)(ni + 1), dnsname,
1663                                             sizeof(dnsname)) == NULL) {
1664                                                 printf("???");
1665                                                 break;
1666                                         }
1667                                         /*
1668                                          * name-lookup special handling for
1669                                          * truncated name
1670                                          */
1671                                         if (cp + 1 <= end && !*cp &&
1672                                             strlen(dnsname) > 0) {
1673                                                 dnsname[strlen(dnsname) - 1] = '\0';
1674                                                 cp++;
1675                                         }
1676                                         printf("%s%s", i > 0 ? "," : "",
1677                                             dnsname);
1678                                 }
1679                         }
1680                         if (options & F_VERBOSE) {
1681                                 int32_t ttl;
1682                                 int comma = 0;
1683
1684                                 (void)printf(" (");     /*)*/
1685
1686                                 switch (ni->ni_code) {
1687                                 case ICMP6_NI_REFUSED:
1688                                         (void)printf("refused");
1689                                         comma++;
1690                                         break;
1691                                 case ICMP6_NI_UNKNOWN:
1692                                         (void)printf("unknown qtype");
1693                                         comma++;
1694                                         break;
1695                                 }
1696
1697                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1698                                         /* case of refusion, unknown */
1699                                         /*(*/
1700                                         putchar(')');
1701                                         goto fqdnend;
1702                                 }
1703                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1704                                 if (comma)
1705                                         printf(",");
1706                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1707                                         (void)printf("TTL=%d:meaningless",
1708                                             (int)ttl);
1709                                 } else {
1710                                         if (ttl < 0) {
1711                                                 (void)printf("TTL=%d:invalid",
1712                                                    ttl);
1713                                         } else
1714                                                 (void)printf("TTL=%d", ttl);
1715                                 }
1716                                 comma++;
1717
1718                                 if (oldfqdn) {
1719                                         if (comma)
1720                                                 printf(",");
1721                                         printf("03 draft");
1722                                         comma++;
1723                                 } else {
1724                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1725                                         if (cp == end) {
1726                                                 if (comma)
1727                                                         printf(",");
1728                                                 printf("no name");
1729                                                 comma++;
1730                                         }
1731                                 }
1732
1733                                 if (buf[off + ICMP6_NIRLEN] !=
1734                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1735                                         if (comma)
1736                                                 printf(",");
1737                                         (void)printf("invalid namelen:%d/%lu",
1738                                             buf[off + ICMP6_NIRLEN],
1739                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1740                                         comma++;
1741                                 }
1742                                 /*(*/
1743                                 putchar(')');
1744                         }
1745                 fqdnend:
1746                         ;
1747                 }
1748         } else {
1749                 /* We've got something other than an ECHOREPLY */
1750                 if (!(options & F_VERBOSE))
1751                         return;
1752                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1753                 pr_icmph(icp, end);
1754         }
1755
1756         if (!(options & F_FLOOD)) {
1757                 (void)putchar('\n');
1758                 if (options & F_VERBOSE)
1759                         pr_exthdrs(mhdr);
1760                 (void)fflush(stdout);
1761         }
1762 #undef safeputc
1763 }
1764
1765 static void
1766 pr_exthdrs(struct msghdr *mhdr)
1767 {
1768         ssize_t bufsize;
1769         void    *bufp;
1770         struct cmsghdr *cm;
1771
1772         bufsize = 0;
1773         bufp = mhdr->msg_control;
1774         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1775              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1776                 if (cm->cmsg_level != IPPROTO_IPV6)
1777                         continue;
1778
1779                 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1780                 if (bufsize <= 0)
1781                         continue;
1782                 switch (cm->cmsg_type) {
1783                 case IPV6_HOPOPTS:
1784                         printf("  HbH Options: ");
1785                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1786                         break;
1787                 case IPV6_DSTOPTS:
1788 #ifdef IPV6_RTHDRDSTOPTS
1789                 case IPV6_RTHDRDSTOPTS:
1790 #endif
1791                         printf("  Dst Options: ");
1792                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1793                         break;
1794                 case IPV6_RTHDR:
1795                         printf("  Routing: ");
1796                         pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1797                         break;
1798                 }
1799         }
1800 }
1801
1802 #ifdef USE_RFC2292BIS
1803 static void
1804 pr_ip6opt(void *extbuf, size_t bufsize)
1805 {
1806         struct ip6_hbh *ext;
1807         int currentlen;
1808         u_int8_t type;
1809         socklen_t extlen, len;
1810         void *databuf;
1811         size_t offset;
1812         u_int16_t value2;
1813         u_int32_t value4;
1814
1815         ext = (struct ip6_hbh *)extbuf;
1816         extlen = (ext->ip6h_len + 1) * 8;
1817         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1818             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1819
1820         /*
1821          * Bounds checking on the ancillary data buffer:
1822          *     subtract the size of a cmsg structure from the buffer size.
1823          */
1824         if (bufsize < (extlen  + CMSG_SPACE(0))) {
1825                 extlen = bufsize - CMSG_SPACE(0);
1826                 warnx("options truncated, showing only %u (total=%u)",
1827                     (unsigned int)(extlen / 8 - 1),
1828                     (unsigned int)(ext->ip6h_len));
1829         }
1830
1831         currentlen = 0;
1832         while (1) {
1833                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1834                     &type, &len, &databuf);
1835                 if (currentlen == -1)
1836                         break;
1837                 switch (type) {
1838                 /*
1839                  * Note that inet6_opt_next automatically skips any padding
1840                  * optins.
1841                  */
1842                 case IP6OPT_JUMBO:
1843                         offset = 0;
1844                         offset = inet6_opt_get_val(databuf, offset,
1845                             &value4, sizeof(value4));
1846                         printf("    Jumbo Payload Opt: Length %u\n",
1847                             (u_int32_t)ntohl(value4));
1848                         break;
1849                 case IP6OPT_ROUTER_ALERT:
1850                         offset = 0;
1851                         offset = inet6_opt_get_val(databuf, offset,
1852                                                    &value2, sizeof(value2));
1853                         printf("    Router Alert Opt: Type %u\n",
1854                             ntohs(value2));
1855                         break;
1856                 default:
1857                         printf("    Received Opt %u len %lu\n",
1858                             type, (unsigned long)len);
1859                         break;
1860                 }
1861         }
1862         return;
1863 }
1864 #else  /* !USE_RFC2292BIS */
1865 /* ARGSUSED */
1866 static void
1867 pr_ip6opt(void *extbuf, size_t bufsize __unused)
1868 {
1869         putchar('\n');
1870         return;
1871 }
1872 #endif /* USE_RFC2292BIS */
1873
1874 #ifdef USE_RFC2292BIS
1875 static void
1876 pr_rthdr(void *extbuf, size_t bufsize)
1877 {
1878         struct in6_addr *in6;
1879         char ntopbuf[INET6_ADDRSTRLEN];
1880         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1881         int i, segments, origsegs, rthsize, size0, size1;
1882
1883         /* print fixed part of the header */
1884         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1885             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1886         if ((segments = inet6_rth_segments(extbuf)) >= 0) {
1887                 printf("%d segments, ", segments);
1888                 printf("%d left\n", rh->ip6r_segleft);
1889         } else {
1890                 printf("segments unknown, ");
1891                 printf("%d left\n", rh->ip6r_segleft);
1892                 return;
1893         }
1894
1895         /*
1896          * Bounds checking on the ancillary data buffer. When calculating
1897          * the number of items to show keep in mind:
1898          *      - The size of the cmsg structure
1899          *      - The size of one segment (the size of a Type 0 routing header)
1900          *      - When dividing add a fudge factor of one in case the
1901          *        dividend is not evenly divisible by the divisor
1902          */
1903         rthsize = (rh->ip6r_len + 1) * 8;
1904         if (bufsize < (rthsize + CMSG_SPACE(0))) {
1905                 origsegs = segments;
1906                 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
1907                 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
1908                 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
1909                     (size1 - size0) + 1;
1910                 warnx("segments truncated, showing only %d (total=%d)",
1911                     segments, origsegs);
1912         }
1913
1914         for (i = 0; i < segments; i++) {
1915                 in6 = inet6_rth_getaddr(extbuf, i);
1916                 if (in6 == NULL)
1917                         printf("   [%d]<NULL>\n", i);
1918                 else {
1919                         if (!inet_ntop(AF_INET6, in6, ntopbuf,
1920                             sizeof(ntopbuf)))
1921                                 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1922                         printf("   [%d]%s\n", i, ntopbuf);
1923                 }
1924         }
1925
1926         return;
1927
1928 }
1929
1930 #else  /* !USE_RFC2292BIS */
1931 /* ARGSUSED */
1932 static void
1933 pr_rthdr(void *extbuf, size_t bufsize __unused)
1934 {
1935         putchar('\n');
1936         return;
1937 }
1938 #endif /* USE_RFC2292BIS */
1939
1940 static int
1941 pr_bitrange(u_int32_t v, int soff, int ii)
1942 {
1943         int off;
1944         int i;
1945
1946         off = 0;
1947         while (off < 32) {
1948                 /* shift till we have 0x01 */
1949                 if ((v & 0x01) == 0) {
1950                         if (ii > 1)
1951                                 printf("-%u", soff + off - 1);
1952                         ii = 0;
1953                         switch (v & 0x0f) {
1954                         case 0x00:
1955                                 v >>= 4;
1956                                 off += 4;
1957                                 continue;
1958                         case 0x08:
1959                                 v >>= 3;
1960                                 off += 3;
1961                                 continue;
1962                         case 0x04: case 0x0c:
1963                                 v >>= 2;
1964                                 off += 2;
1965                                 continue;
1966                         default:
1967                                 v >>= 1;
1968                                 off += 1;
1969                                 continue;
1970                         }
1971                 }
1972
1973                 /* we have 0x01 with us */
1974                 for (i = 0; i < 32 - off; i++) {
1975                         if ((v & (0x01 << i)) == 0)
1976                                 break;
1977                 }
1978                 if (!ii)
1979                         printf(" %u", soff + off);
1980                 ii += i;
1981                 v >>= i; off += i;
1982         }
1983         return ii;
1984 }
1985
1986 static void
1987 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1988         /* ni->qtype must be SUPTYPES */
1989 {
1990         size_t clen;
1991         u_int32_t v;
1992         const u_char *cp, *end;
1993         u_int16_t cur;
1994         struct cbit {
1995                 u_int16_t words;        /*32bit count*/
1996                 u_int16_t skip;
1997         } cbit;
1998 #define MAXQTYPES       (1 << 16)
1999         size_t off;
2000         int b;
2001
2002         cp = (u_char *)(ni + 1);
2003         end = ((u_char *)ni) + nilen;
2004         cur = 0;
2005         b = 0;
2006
2007         printf("NodeInfo Supported Qtypes");
2008         if (options & F_VERBOSE) {
2009                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
2010                         printf(", compressed bitmap");
2011                 else
2012                         printf(", raw bitmap");
2013         }
2014
2015         while (cp < end) {
2016                 clen = (size_t)(end - cp);
2017                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
2018                         if (clen == 0 || clen > MAXQTYPES / 8 ||
2019                             clen % sizeof(v)) {
2020                                 printf("???");
2021                                 return;
2022                         }
2023                 } else {
2024                         if (clen < sizeof(cbit) || clen % sizeof(v))
2025                                 return;
2026                         memcpy(&cbit, cp, sizeof(cbit));
2027                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2028                             clen)
2029                                 return;
2030                         cp += sizeof(cbit);
2031                         clen = ntohs(cbit.words) * sizeof(v);
2032                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
2033                             MAXQTYPES)
2034                                 return;
2035                 }
2036
2037                 for (off = 0; off < clen; off += sizeof(v)) {
2038                         memcpy(&v, cp + off, sizeof(v));
2039                         v = (u_int32_t)ntohl(v);
2040                         b = pr_bitrange(v, (int)(cur + off * 8), b);
2041                 }
2042                 /* flush the remaining bits */
2043                 b = pr_bitrange(0, (int)(cur + off * 8), b);
2044
2045                 cp += clen;
2046                 cur += clen * 8;
2047                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2048                         cur += ntohs(cbit.skip) * 32;
2049         }
2050 }
2051
2052 static void
2053 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
2054         /* ni->qtype must be NODEADDR */
2055 {
2056         u_char *cp = (u_char *)(ni + 1);
2057         char ntop_buf[INET6_ADDRSTRLEN];
2058         int withttl = 0;
2059
2060         nilen -= sizeof(struct icmp6_nodeinfo);
2061
2062         if (options & F_VERBOSE) {
2063                 switch (ni->ni_code) {
2064                 case ICMP6_NI_REFUSED:
2065                         (void)printf("refused");
2066                         break;
2067                 case ICMP6_NI_UNKNOWN:
2068                         (void)printf("unknown qtype");
2069                         break;
2070                 }
2071                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2072                         (void)printf(" truncated");
2073         }
2074         putchar('\n');
2075         if (nilen <= 0)
2076                 printf("  no address\n");
2077
2078         /*
2079          * In icmp-name-lookups 05 and later, TTL of each returned address
2080          * is contained in the resposne. We try to detect the version
2081          * by the length of the data, but note that the detection algorithm
2082          * is incomplete. We assume the latest draft by default.
2083          */
2084         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
2085                 withttl = 1;
2086         while (nilen > 0) {
2087                 u_int32_t ttl;
2088
2089                 if (withttl) {
2090                         /* XXX: alignment? */
2091                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
2092                         cp += sizeof(u_int32_t);
2093                         nilen -= sizeof(u_int32_t);
2094                 }
2095
2096                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2097                     NULL)
2098                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2099                 printf("  %s", ntop_buf);
2100                 if (withttl) {
2101                         if (ttl == 0xffffffff) {
2102                                 /*
2103                                  * XXX: can this convention be applied to all
2104                                  * type of TTL (i.e. non-ND TTL)?
2105                                  */
2106                                 printf("(TTL=infty)");
2107                         }
2108                         else
2109                                 printf("(TTL=%u)", ttl);
2110                 }
2111                 putchar('\n');
2112
2113                 nilen -= sizeof(struct in6_addr);
2114                 cp += sizeof(struct in6_addr);
2115         }
2116 }
2117
2118 static int
2119 get_hoplim(struct msghdr *mhdr)
2120 {
2121         struct cmsghdr *cm;
2122
2123         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2124              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2125                 if (cm->cmsg_len == 0)
2126                         return(-1);
2127
2128                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2129                     cm->cmsg_type == IPV6_HOPLIMIT &&
2130                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
2131                         return(*(int *)CMSG_DATA(cm));
2132         }
2133
2134         return(-1);
2135 }
2136
2137 static struct in6_pktinfo *
2138 get_rcvpktinfo(struct msghdr *mhdr)
2139 {
2140         struct cmsghdr *cm;
2141
2142         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2143              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2144                 if (cm->cmsg_len == 0)
2145                         return(NULL);
2146
2147                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2148                     cm->cmsg_type == IPV6_PKTINFO &&
2149                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2150                         return((struct in6_pktinfo *)CMSG_DATA(cm));
2151         }
2152
2153         return(NULL);
2154 }
2155
2156 static int
2157 get_pathmtu(struct msghdr *mhdr)
2158 {
2159 #ifdef IPV6_RECVPATHMTU
2160         struct cmsghdr *cm;
2161         struct ip6_mtuinfo *mtuctl = NULL;
2162
2163         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2164              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2165                 if (cm->cmsg_len == 0)
2166                         return(0);
2167
2168                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2169                     cm->cmsg_type == IPV6_PATHMTU &&
2170                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2171                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2172
2173                         /*
2174                          * If the notified destination is different from
2175                          * the one we are pinging, just ignore the info.
2176                          * We check the scope ID only when both notified value
2177                          * and our own value have non-0 values, because we may
2178                          * have used the default scope zone ID for sending,
2179                          * in which case the scope ID value is 0.
2180                          */
2181                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2182                                                 &dst.sin6_addr) ||
2183                             (mtuctl->ip6m_addr.sin6_scope_id &&
2184                              dst.sin6_scope_id &&
2185                              mtuctl->ip6m_addr.sin6_scope_id !=
2186                              dst.sin6_scope_id)) {
2187                                 if ((options & F_VERBOSE) != 0) {
2188                                         printf("path MTU for %s is notified. "
2189                                                "(ignored)\n",
2190                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2191                                            sizeof(mtuctl->ip6m_addr)));
2192                                 }
2193                                 return(0);
2194                         }
2195
2196                         /*
2197                          * Ignore an invalid MTU. XXX: can we just believe
2198                          * the kernel check?
2199                          */
2200                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2201                                 return(0);
2202
2203                         /* notification for our destination. return the MTU. */
2204                         return((int)mtuctl->ip6m_mtu);
2205                 }
2206         }
2207 #endif
2208         return(0);
2209 }
2210
2211 /*
2212  * tvsub --
2213  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2214  * be >= in.
2215  */
2216 static void
2217 tvsub(struct timeval *out, struct timeval *in)
2218 {
2219         if ((out->tv_usec -= in->tv_usec) < 0) {
2220                 --out->tv_sec;
2221                 out->tv_usec += 1000000;
2222         }
2223         out->tv_sec -= in->tv_sec;
2224 }
2225
2226 /*
2227  * onint --
2228  *      SIGINT handler.
2229  */
2230 /* ARGSUSED */
2231 static void
2232 onint(int notused __unused)
2233 {
2234         /*
2235          * When doing reverse DNS lookups, the seenint flag might not
2236          * be noticed for a while.  Just exit if we get a second SIGINT.
2237          */
2238         if ((options & F_HOSTNAME) && seenint != 0)
2239                 _exit(nreceived ? 0 : 2);
2240 }
2241
2242 /*
2243  * summary --
2244  *      Print out statistics.
2245  */
2246 static void
2247 summary(void)
2248 {
2249
2250         (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2251         (void)printf("%ld packets transmitted, ", ntransmitted);
2252         (void)printf("%ld packets received, ", nreceived);
2253         if (nrepeats)
2254                 (void)printf("+%ld duplicates, ", nrepeats);
2255         if (ntransmitted) {
2256                 if (nreceived > ntransmitted)
2257                         (void)printf("-- somebody's duplicating packets!");
2258                 else
2259                         (void)printf("%.1f%% packet loss",
2260                             ((((double)ntransmitted - nreceived) * 100.0) /
2261                             ntransmitted));
2262         }
2263         if (nrcvtimeout)
2264                 printf(", %ld packets out of wait time", nrcvtimeout);
2265         (void)putchar('\n');
2266         if (nreceived && timing) {
2267                 /* Only display average to microseconds */
2268                 double num = nreceived + nrepeats;
2269                 double avg = tsum / num;
2270                 double dev = sqrt(tsumsq / num - avg * avg);
2271                 (void)printf(
2272                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2273                     tmin, avg, tmax, dev);
2274                 (void)fflush(stdout);
2275         }
2276         (void)fflush(stdout);
2277 }
2278
2279 /*subject type*/
2280 static const char *niqcode[] = {
2281         "IPv6 address",
2282         "DNS label",    /*or empty*/
2283         "IPv4 address",
2284 };
2285
2286 /*result code*/
2287 static const char *nircode[] = {
2288         "Success", "Refused", "Unknown",
2289 };
2290
2291
2292 /*
2293  * pr_icmph --
2294  *      Print a descriptive string about an ICMP header.
2295  */
2296 static void
2297 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2298 {
2299         char ntop_buf[INET6_ADDRSTRLEN];
2300         struct nd_redirect *red;
2301         struct icmp6_nodeinfo *ni;
2302         char dnsname[MAXDNAME + 1];
2303         const u_char *cp;
2304         size_t l;
2305
2306         switch (icp->icmp6_type) {
2307         case ICMP6_DST_UNREACH:
2308                 switch (icp->icmp6_code) {
2309                 case ICMP6_DST_UNREACH_NOROUTE:
2310                         (void)printf("No Route to Destination\n");
2311                         break;
2312                 case ICMP6_DST_UNREACH_ADMIN:
2313                         (void)printf("Destination Administratively "
2314                             "Unreachable\n");
2315                         break;
2316                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2317                         (void)printf("Destination Unreachable Beyond Scope\n");
2318                         break;
2319                 case ICMP6_DST_UNREACH_ADDR:
2320                         (void)printf("Destination Host Unreachable\n");
2321                         break;
2322                 case ICMP6_DST_UNREACH_NOPORT:
2323                         (void)printf("Destination Port Unreachable\n");
2324                         break;
2325                 default:
2326                         (void)printf("Destination Unreachable, Bad Code: %d\n",
2327                             icp->icmp6_code);
2328                         break;
2329                 }
2330                 /* Print returned IP header information */
2331                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2332                 break;
2333         case ICMP6_PACKET_TOO_BIG:
2334                 (void)printf("Packet too big mtu = %d\n",
2335                     (int)ntohl(icp->icmp6_mtu));
2336                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2337                 break;
2338         case ICMP6_TIME_EXCEEDED:
2339                 switch (icp->icmp6_code) {
2340                 case ICMP6_TIME_EXCEED_TRANSIT:
2341                         (void)printf("Time to live exceeded\n");
2342                         break;
2343                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2344                         (void)printf("Frag reassembly time exceeded\n");
2345                         break;
2346                 default:
2347                         (void)printf("Time exceeded, Bad Code: %d\n",
2348                             icp->icmp6_code);
2349                         break;
2350                 }
2351                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2352                 break;
2353         case ICMP6_PARAM_PROB:
2354                 (void)printf("Parameter problem: ");
2355                 switch (icp->icmp6_code) {
2356                 case ICMP6_PARAMPROB_HEADER:
2357                         (void)printf("Erroneous Header ");
2358                         break;
2359                 case ICMP6_PARAMPROB_NEXTHEADER:
2360                         (void)printf("Unknown Nextheader ");
2361                         break;
2362                 case ICMP6_PARAMPROB_OPTION:
2363                         (void)printf("Unrecognized Option ");
2364                         break;
2365                 default:
2366                         (void)printf("Bad code(%d) ", icp->icmp6_code);
2367                         break;
2368                 }
2369                 (void)printf("pointer = 0x%02x\n",
2370                     (u_int32_t)ntohl(icp->icmp6_pptr));
2371                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2372                 break;
2373         case ICMP6_ECHO_REQUEST:
2374                 (void)printf("Echo Request");
2375                 /* XXX ID + Seq + Data */
2376                 break;
2377         case ICMP6_ECHO_REPLY:
2378                 (void)printf("Echo Reply");
2379                 /* XXX ID + Seq + Data */
2380                 break;
2381         case ICMP6_MEMBERSHIP_QUERY:
2382                 (void)printf("Listener Query");
2383                 break;
2384         case ICMP6_MEMBERSHIP_REPORT:
2385                 (void)printf("Listener Report");
2386                 break;
2387         case ICMP6_MEMBERSHIP_REDUCTION:
2388                 (void)printf("Listener Done");
2389                 break;
2390         case ND_ROUTER_SOLICIT:
2391                 (void)printf("Router Solicitation");
2392                 break;
2393         case ND_ROUTER_ADVERT:
2394                 (void)printf("Router Advertisement");
2395                 break;
2396         case ND_NEIGHBOR_SOLICIT:
2397                 (void)printf("Neighbor Solicitation");
2398                 break;
2399         case ND_NEIGHBOR_ADVERT:
2400                 (void)printf("Neighbor Advertisement");
2401                 break;
2402         case ND_REDIRECT:
2403                 red = (struct nd_redirect *)icp;
2404                 (void)printf("Redirect\n");
2405                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2406                     sizeof(ntop_buf)))
2407                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2408                 (void)printf("Destination: %s", ntop_buf);
2409                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2410                     sizeof(ntop_buf)))
2411                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2412                 (void)printf(" New Target: %s", ntop_buf);
2413                 break;
2414         case ICMP6_NI_QUERY:
2415                 (void)printf("Node Information Query");
2416                 /* XXX ID + Seq + Data */
2417                 ni = (struct icmp6_nodeinfo *)icp;
2418                 l = end - (u_char *)(ni + 1);
2419                 printf(", ");
2420                 switch (ntohs(ni->ni_qtype)) {
2421                 case NI_QTYPE_NOOP:
2422                         (void)printf("NOOP");
2423                         break;
2424                 case NI_QTYPE_SUPTYPES:
2425                         (void)printf("Supported qtypes");
2426                         break;
2427                 case NI_QTYPE_FQDN:
2428                         (void)printf("DNS name");
2429                         break;
2430                 case NI_QTYPE_NODEADDR:
2431                         (void)printf("nodeaddr");
2432                         break;
2433                 case NI_QTYPE_IPV4ADDR:
2434                         (void)printf("IPv4 nodeaddr");
2435                         break;
2436                 default:
2437                         (void)printf("unknown qtype");
2438                         break;
2439                 }
2440                 if (options & F_VERBOSE) {
2441                         switch (ni->ni_code) {
2442                         case ICMP6_NI_SUBJ_IPV6:
2443                                 if (l == sizeof(struct in6_addr) &&
2444                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2445                                     sizeof(ntop_buf)) != NULL) {
2446                                         (void)printf(", subject=%s(%s)",
2447                                             niqcode[ni->ni_code], ntop_buf);
2448                                 } else {
2449 #if 1
2450                                         /* backward compat to -W */
2451                                         (void)printf(", oldfqdn");
2452 #else
2453                                         (void)printf(", invalid");
2454 #endif
2455                                 }
2456                                 break;
2457                         case ICMP6_NI_SUBJ_FQDN:
2458                                 if (end == (u_char *)(ni + 1)) {
2459                                         (void)printf(", no subject");
2460                                         break;
2461                                 }
2462                                 printf(", subject=%s", niqcode[ni->ni_code]);
2463                                 cp = (const u_char *)(ni + 1);
2464                                 if (dnsdecode(&cp, end, NULL, dnsname,
2465                                     sizeof(dnsname)) != NULL)
2466                                         printf("(%s)", dnsname);
2467                                 else
2468                                         printf("(invalid)");
2469                                 break;
2470                         case ICMP6_NI_SUBJ_IPV4:
2471                                 if (l == sizeof(struct in_addr) &&
2472                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2473                                     sizeof(ntop_buf)) != NULL) {
2474                                         (void)printf(", subject=%s(%s)",
2475                                             niqcode[ni->ni_code], ntop_buf);
2476                                 } else
2477                                         (void)printf(", invalid");
2478                                 break;
2479                         default:
2480                                 (void)printf(", invalid");
2481                                 break;
2482                         }
2483                 }
2484                 break;
2485         case ICMP6_NI_REPLY:
2486                 (void)printf("Node Information Reply");
2487                 /* XXX ID + Seq + Data */
2488                 ni = (struct icmp6_nodeinfo *)icp;
2489                 printf(", ");
2490                 switch (ntohs(ni->ni_qtype)) {
2491                 case NI_QTYPE_NOOP:
2492                         (void)printf("NOOP");
2493                         break;
2494                 case NI_QTYPE_SUPTYPES:
2495                         (void)printf("Supported qtypes");
2496                         break;
2497                 case NI_QTYPE_FQDN:
2498                         (void)printf("DNS name");
2499                         break;
2500                 case NI_QTYPE_NODEADDR:
2501                         (void)printf("nodeaddr");
2502                         break;
2503                 case NI_QTYPE_IPV4ADDR:
2504                         (void)printf("IPv4 nodeaddr");
2505                         break;
2506                 default:
2507                         (void)printf("unknown qtype");
2508                         break;
2509                 }
2510                 if (options & F_VERBOSE) {
2511                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2512                                 printf(", invalid");
2513                         else
2514                                 printf(", %s", nircode[ni->ni_code]);
2515                 }
2516                 break;
2517         default:
2518                 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2519         }
2520 }
2521
2522 /*
2523  * pr_iph --
2524  *      Print an IP6 header.
2525  */
2526 static void
2527 pr_iph(struct ip6_hdr *ip6)
2528 {
2529         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2530         u_int8_t tc;
2531         char ntop_buf[INET6_ADDRSTRLEN];
2532
2533         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2534         tc = (tc >> 4) & 0x0f;
2535         tc |= (ip6->ip6_vfc << 4);
2536
2537         printf("Vr TC  Flow Plen Nxt Hlim\n");
2538         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2539             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2540             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2541         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2542                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2543         printf("%s->", ntop_buf);
2544         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2545                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2546         printf("%s\n", ntop_buf);
2547 }
2548
2549 /*
2550  * pr_addr --
2551  *      Return an ascii host address as a dotted quad and optionally with
2552  * a hostname.
2553  */
2554 static const char *
2555 pr_addr(struct sockaddr *addr, int addrlen)
2556 {
2557         static char buf[NI_MAXHOST];
2558         int flag = 0;
2559
2560         if ((options & F_HOSTNAME) == 0)
2561                 flag |= NI_NUMERICHOST;
2562
2563         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2564                 return (buf);
2565         else
2566                 return "?";
2567 }
2568
2569 /*
2570  * pr_retip --
2571  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2572  */
2573 static void
2574 pr_retip(struct ip6_hdr *ip6, u_char *end)
2575 {
2576         u_char *cp = (u_char *)ip6, nh;
2577         int hlen;
2578
2579         if ((size_t)(end - (u_char *)ip6) < sizeof(*ip6)) {
2580                 printf("IP6");
2581                 goto trunc;
2582         }
2583         pr_iph(ip6);
2584         hlen = sizeof(*ip6);
2585
2586         nh = ip6->ip6_nxt;
2587         cp += hlen;
2588         while (end - cp >= 8) {
2589                 switch (nh) {
2590                 case IPPROTO_HOPOPTS:
2591                         printf("HBH ");
2592                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2593                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2594                         break;
2595                 case IPPROTO_DSTOPTS:
2596                         printf("DSTOPT ");
2597                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2598                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2599                         break;
2600                 case IPPROTO_FRAGMENT:
2601                         printf("FRAG ");
2602                         hlen = sizeof(struct ip6_frag);
2603                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2604                         break;
2605                 case IPPROTO_ROUTING:
2606                         printf("RTHDR ");
2607                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2608                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2609                         break;
2610 #ifdef IPSEC
2611                 case IPPROTO_AH:
2612                         printf("AH ");
2613                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2614                         nh = ((struct ah *)cp)->ah_nxt;
2615                         break;
2616 #endif
2617                 case IPPROTO_ICMPV6:
2618                         printf("ICMP6: type = %d, code = %d\n",
2619                             *cp, *(cp + 1));
2620                         return;
2621                 case IPPROTO_ESP:
2622                         printf("ESP\n");
2623                         return;
2624                 case IPPROTO_TCP:
2625                         printf("TCP: from port %u, to port %u (decimal)\n",
2626                             (*cp * 256 + *(cp + 1)),
2627                             (*(cp + 2) * 256 + *(cp + 3)));
2628                         return;
2629                 case IPPROTO_UDP:
2630                         printf("UDP: from port %u, to port %u (decimal)\n",
2631                             (*cp * 256 + *(cp + 1)),
2632                             (*(cp + 2) * 256 + *(cp + 3)));
2633                         return;
2634                 default:
2635                         printf("Unknown Header(%d)\n", nh);
2636                         return;
2637                 }
2638
2639                 if ((cp += hlen) >= end)
2640                         goto trunc;
2641         }
2642         if (end - cp < 8)
2643                 goto trunc;
2644
2645         putchar('\n');
2646         return;
2647
2648   trunc:
2649         printf("...\n");
2650         return;
2651 }
2652
2653 static void
2654 fill(char *bp, char *patp)
2655 {
2656         int ii, jj, kk;
2657         int pat[16];
2658         char *cp;
2659
2660         for (cp = patp; *cp; cp++)
2661                 if (!isxdigit(*cp))
2662                         errx(1, "patterns must be specified as hex digits");
2663         ii = sscanf(patp,
2664             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2665             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2666             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2667             &pat[13], &pat[14], &pat[15]);
2668
2669 /* xxx */
2670         if (ii > 0)
2671                 for (kk = 0;
2672                     (size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + ii;
2673                     kk += ii)
2674                         for (jj = 0; jj < ii; ++jj)
2675                                 bp[jj + kk] = pat[jj];
2676         if (!(options & F_QUIET)) {
2677                 (void)printf("PATTERN: 0x");
2678                 for (jj = 0; jj < ii; ++jj)
2679                         (void)printf("%02x", bp[jj] & 0xFF);
2680                 (void)printf("\n");
2681         }
2682 }
2683
2684 #ifdef IPSEC
2685 #ifdef IPSEC_POLICY_IPSEC
2686 static int
2687 setpolicy(int so __unused, char *policy)
2688 {
2689         char *buf;
2690
2691         if (policy == NULL)
2692                 return 0;       /* ignore */
2693
2694         buf = ipsec_set_policy(policy, strlen(policy));
2695         if (buf == NULL)
2696                 errx(1, "%s", ipsec_strerror());
2697         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2698             ipsec_get_policylen(buf)) < 0)
2699                 warnx("Unable to set IPsec policy");
2700         free(buf);
2701
2702         return 0;
2703 }
2704 #endif
2705 #endif
2706
2707 static char *
2708 nigroup(char *name, int nig_oldmcprefix)
2709 {
2710         char *p;
2711         char *q;
2712         MD5_CTX ctxt;
2713         u_int8_t digest[16];
2714         u_int8_t c;
2715         size_t l;
2716         char hbuf[NI_MAXHOST];
2717         struct in6_addr in6;
2718         int valid;
2719
2720         p = strchr(name, '.');
2721         if (!p)
2722                 p = name + strlen(name);
2723         l = p - name;
2724         if (l > 63 || l > sizeof(hbuf) - 1)
2725                 return NULL;    /*label too long*/
2726         strncpy(hbuf, name, l);
2727         hbuf[(int)l] = '\0';
2728
2729         for (q = name; *q; q++) {
2730                 if (isupper(*(unsigned char *)q))
2731                         *q = tolower(*(unsigned char *)q);
2732         }
2733
2734         /* generate 16 bytes of pseudo-random value. */
2735         memset(&ctxt, 0, sizeof(ctxt));
2736         MD5Init(&ctxt);
2737         c = l & 0xff;
2738         MD5Update(&ctxt, &c, sizeof(c));
2739         MD5Update(&ctxt, (unsigned char *)name, l);
2740         MD5Final(digest, &ctxt);
2741
2742         if (nig_oldmcprefix) {
2743                 /* draft-ietf-ipngwg-icmp-name-lookup */
2744                 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
2745         } else {
2746                 /* RFC 4620 */
2747                 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
2748         }
2749         if (valid != 1)
2750                 return NULL;    /*XXX*/
2751
2752         if (nig_oldmcprefix) {
2753                 /* draft-ietf-ipngwg-icmp-name-lookup */
2754                 bcopy(digest, &in6.s6_addr[12], 4);
2755         } else {
2756                 /* RFC 4620 */
2757                 bcopy(digest, &in6.s6_addr[13], 3);
2758         }
2759
2760         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2761                 return NULL;
2762
2763         return strdup(hbuf);
2764 }
2765
2766 static void
2767 usage(void)
2768 {
2769         (void)fprintf(stderr,
2770 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2771             "A"
2772 #endif
2773             "usage: ping6 [-"
2774             "Dd"
2775 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2776             "E"
2777 #endif
2778             "fH"
2779 #ifdef IPV6_USE_MIN_MTU
2780             "m"
2781 #endif
2782             "nNoqrRtvwW] "
2783             "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2784             "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2785 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2786             " [-P policy]"
2787 #endif
2788             "\n"
2789             "             [-p pattern] [-S sourceaddr] [-s packetsize] "
2790             "[-x waittime]\n"
2791             "             [-X timeout] [hops ...] host\n");
2792         exit(1);
2793 }