sbin/ping6/ping6.c

   1 /*      $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /*      BSDI    ping.c,v 2.3 1996/01/21 17:56:50 jch Exp        */
  33
  34 /*
  35  * Copyright (c) 1989, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * Mike Muuss.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  */
  65
  66 #ifndef lint
  67 static const char copyright[] =
  68 "@(#) Copyright (c) 1989, 1993\n\
  69         The Regents of the University of California.  All rights reserved.\n";
  70 #endif /* not lint */
  71
  72 #ifndef lint
  73 #if 0
  74 static char sccsid[] = "@(#)ping.c      8.1 (Berkeley) 6/5/93";
  75 #endif
  76 #endif /* not lint */
  77
  78 #include <sys/cdefs.h>
  79 __FBSDID("$FreeBSD$");
  80
  81 /*
  82  * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
  83  * measure round-trip-delays and packet loss across network paths.
  84  *
  85  * Author -
  86  *      Mike Muuss
  87  *      U. S. Army Ballistic Research Laboratory
  88  *      December, 1983
  89  *
  90  * Status -
  91  *      Public Domain.  Distribution Unlimited.
  92  * Bugs -
  93  *      More statistics could always be gathered.
  94  *      This program has to run SUID to ROOT to access the ICMP socket.
  95  */
  96 /*
  97  * NOTE:
  98  * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
  99  * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
 100  * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
 101  * network attached to 1 or more interfaces)
 102  */
 103
 104 #include <sys/param.h>
 105 #include <sys/uio.h>
 106 #include <sys/socket.h>
 107 #include <sys/time.h>
 108
 109 #include <net/if.h>
 110 #include <net/route.h>
 111
 112 #include <netinet/in.h>
 113 #include <netinet/ip6.h>
 114 #include <netinet/icmp6.h>
 115 #include <arpa/inet.h>
 116 #include <arpa/nameser.h>
 117 #include <netdb.h>
 118
 119 #include <ctype.h>
 120 #include <err.h>
 121 #include <errno.h>
 122 #include <fcntl.h>
 123 #include <math.h>
 124 #include <signal.h>
 125 #include <stdio.h>
 126 #include <stdlib.h>
 127 #include <string.h>
 128 #include <sysexits.h>
 129 #include <unistd.h>
 130
 131 #ifdef IPSEC
 132 #include <netipsec/ah.h>
 133 #include <netipsec/ipsec.h>
 134 #endif
 135
 136 #include <md5.h>
 137
 138 struct tv32 {
 139         u_int32_t tv32_sec;
 140         u_int32_t tv32_usec;
 141 };
 142
 143 #define MAXPACKETLEN    131072
 144 #define IP6LEN          40
 145 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 146 #define ICMP6ECHOTMLEN sizeof(struct tv32)
 147 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 148 # define CONTROLLEN     10240   /* ancillary data buffer size RFC3542 20.1 */
 149 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 150 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 151 #define EXTRA           256     /* for AH and various other headers. weird. */
 152 #define DEFDATALEN      ICMP6ECHOTMLEN
 153 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 154 #define NROUTES         9               /* number of record route slots */
 155 #define MAXWAIT         10000           /* max ms to wait for response */
 156 #define MAXALARM        (60 * 60)       /* max seconds for alarm timeout */
 157
 158 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 159 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 160 #define SET(bit)        (A(bit) |= B(bit))
 161 #define CLR(bit)        (A(bit) &= (~B(bit)))
 162 #define TST(bit)        (A(bit) & B(bit))
 163
 164 #define F_FLOOD         0x0001
 165 #define F_INTERVAL      0x0002
 166 #define F_PINGFILLED    0x0008
 167 #define F_QUIET         0x0010
 168 #define F_RROUTE        0x0020
 169 #define F_SO_DEBUG      0x0040
 170 #define F_VERBOSE       0x0100
 171 #ifdef IPSEC
 172 #ifdef IPSEC_POLICY_IPSEC
 173 #define F_POLICY        0x0400
 174 #else
 175 #define F_AUTHHDR       0x0200
 176 #define F_ENCRYPT       0x0400
 177 #endif /*IPSEC_POLICY_IPSEC*/
 178 #endif /*IPSEC*/
 179 #define F_NODEADDR      0x0800
 180 #define F_FQDN          0x1000
 181 #define F_INTERFACE     0x2000
 182 #define F_SRCADDR       0x4000
 183 #define F_HOSTNAME      0x10000
 184 #define F_FQDNOLD       0x20000
 185 #define F_NIGROUP       0x40000
 186 #define F_SUPTYPES      0x80000
 187 #define F_NOMINMTU      0x100000
 188 #define F_ONCE          0x200000
 189 #define F_AUDIBLE       0x400000
 190 #define F_MISSED        0x800000
 191 #define F_DONTFRAG      0x1000000
 192 #define F_NOUSERDATA    (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
 193 #define F_WAITTIME      0x2000000
 194 u_int options;
 195
 196 #define IN6LEN          sizeof(struct in6_addr)
 197 #define SA6LEN          sizeof(struct sockaddr_in6)
 198 #define DUMMY_PORT      10101
 199
 200 #define SIN6(s) ((struct sockaddr_in6 *)(s))
 201
 202 /*
 203  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 204  * number of received sequence numbers we can keep track of.  Change 128
 205  * to 8192 for complete accuracy...
 206  */
 207 #define MAX_DUP_CHK     (8 * 8192)
 208 int mx_dup_ck = MAX_DUP_CHK;
 209 char rcvd_tbl[MAX_DUP_CHK / 8];
 210
 211 struct sockaddr_in6 dst;        /* who to ping6 */
 212 struct sockaddr_in6 src;        /* src addr of this packet */
 213 socklen_t srclen;
 214 int datalen = DEFDATALEN;
 215 int s;                          /* socket file descriptor */
 216 u_char outpack[MAXPACKETLEN];
 217 char BSPACE = '\b';             /* characters written for flood */
 218 char BBELL = '\a';              /* characters written for AUDIBLE */
 219 char DOT = '.';
 220 char *hostname;
 221 int ident;                      /* process id to identify our packets */
 222 u_int8_t nonce[8];              /* nonce field for node information */
 223 int hoplimit = -1;              /* hoplimit */
 224 int pathmtu = 0;                /* path MTU for the destination.  0 = unspec. */
 225 u_char *packet = NULL;
 226
 227 /* counters */
 228 long nmissedmax;                /* max value of ntransmitted - nreceived - 1 */
 229 long npackets;                  /* max packets to transmit */
 230 long nreceived;                 /* # of packets we got back */
 231 long nrepeats;                  /* number of duplicates */
 232 long ntransmitted;              /* sequence # for outbound packets = #sent */
 233 int interval = 1000;            /* interval between packets in ms */
 234 int waittime = MAXWAIT;         /* timeout for each packet */
 235 long nrcvtimeout = 0;           /* # of packets we got back after waittime */
 236
 237 /* timing */
 238 int timing;                     /* flag to do timing */
 239 double tmin = 999999999.0;      /* minimum round trip time */
 240 double tmax = 0.0;              /* maximum round trip time */
 241 double tsum = 0.0;              /* sum of all times, for doing average */
 242 double tsumsq = 0.0;            /* sum of all times squared, for std. dev. */
 243
 244 /* for node addresses */
 245 u_short naflags;
 246
 247 /* for ancillary data(advanced API) */
 248 struct msghdr smsghdr;
 249 struct iovec smsgiov;
 250 char *scmsg = 0;
 251
 252 volatile sig_atomic_t seenint;
 253 #ifdef SIGINFO
 254 volatile sig_atomic_t seeninfo;
 255 #endif
 256
 257 int      main(int, char *[]);
 258 void     fill(char *, char *);
 259 int      get_hoplim(struct msghdr *);
 260 int      get_pathmtu(struct msghdr *);
 261 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
 262 void     onsignal(int);
 263 void     onint(int);
 264 size_t   pingerlen(void);
 265 int      pinger(void);
 266 const char *pr_addr(struct sockaddr *, int);
 267 void     pr_icmph(struct icmp6_hdr *, u_char *);
 268 void     pr_iph(struct ip6_hdr *);
 269 void     pr_suptypes(struct icmp6_nodeinfo *, size_t);
 270 void     pr_nodeaddr(struct icmp6_nodeinfo *, int);
 271 int      myechoreply(const struct icmp6_hdr *);
 272 int      mynireply(const struct icmp6_nodeinfo *);
 273 char *dnsdecode(const u_char **, const u_char *, const u_char *,
 274         char *, size_t);
 275 void     pr_pack(u_char *, int, struct msghdr *);
 276 void     pr_exthdrs(struct msghdr *);
 277 void     pr_ip6opt(void *, size_t);
 278 void     pr_rthdr(void *, size_t);
 279 int      pr_bitrange(u_int32_t, int, int);
 280 void     pr_retip(struct ip6_hdr *, u_char *);
 281 void     summary(void);
 282 void     tvsub(struct timeval *, struct timeval *);
 283 int      setpolicy(int, char *);
 284 char    *nigroup(char *, int);
 285 void     usage(void);
 286
 287 int
 288 main(int argc, char *argv[])
 289 {
 290         struct timeval last, intvl;
 291         struct sockaddr_in6 from, *sin6;
 292         struct addrinfo hints, *res;
 293         struct sigaction si_sa;
 294         int cc, i;
 295         int almost_done, ch, hold, packlen, preload, optval, error;
 296         int nig_oldmcprefix = -1;
 297         u_char *datap;
 298         char *e, *target, *ifname = NULL, *gateway = NULL;
 299         int ip6optlen = 0;
 300         struct cmsghdr *scmsgp = NULL;
 301         /* For control (ancillary) data received from recvmsg() */
 302         struct cmsghdr cm[CONTROLLEN];
 303 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 304         u_long lsockbufsize;
 305         int sockbufsize = 0;
 306 #endif
 307         int usepktinfo = 0;
 308         struct in6_pktinfo *pktinfo = NULL;
 309 #ifdef USE_RFC2292BIS
 310         struct ip6_rthdr *rthdr = NULL;
 311 #endif
 312 #ifdef IPSEC_POLICY_IPSEC
 313         char *policy_in = NULL;
 314         char *policy_out = NULL;
 315 #endif
 316         double t;
 317         u_long alarmtimeout;
 318         size_t rthlen;
 319 #ifdef IPV6_USE_MIN_MTU
 320         int mflag = 0;
 321 #endif
 322
 323         /* just to be sure */
 324         memset(&smsghdr, 0, sizeof(smsghdr));
 325         memset(&smsgiov, 0, sizeof(smsgiov));
 326
 327         alarmtimeout = preload = 0;
 328         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 329 #ifndef IPSEC
 330 #define ADDOPTS
 331 #else
 332 #ifdef IPSEC_POLICY_IPSEC
 333 #define ADDOPTS "P:"
 334 #else
 335 #define ADDOPTS "AE"
 336 #endif /*IPSEC_POLICY_IPSEC*/
 337 #endif
 338         while ((ch = getopt(argc, argv,
 339             "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) {
 340 #undef ADDOPTS
 341                 switch (ch) {
 342                 case 'a':
 343                 {
 344                         char *cp;
 345
 346                         options &= ~F_NOUSERDATA;
 347                         options |= F_NODEADDR;
 348                         for (cp = optarg; *cp != '\0'; cp++) {
 349                                 switch (*cp) {
 350                                 case 'a':
 351                                         naflags |= NI_NODEADDR_FLAG_ALL;
 352                                         break;
 353                                 case 'c':
 354                                 case 'C':
 355                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 356                                         break;
 357                                 case 'l':
 358                                 case 'L':
 359                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 360                                         break;
 361                                 case 's':
 362                                 case 'S':
 363                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 364                                         break;
 365                                 case 'g':
 366                                 case 'G':
 367                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 368                                         break;
 369                                 case 'A': /* experimental. not in the spec */
 370 #ifdef NI_NODEADDR_FLAG_ANYCAST
 371                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 372                                         break;
 373 #else
 374                                         errx(1,
 375 "-a A is not supported on the platform");
 376                                         /*NOTREACHED*/
 377 #endif
 378                                 default:
 379                                         usage();
 380                                         /*NOTREACHED*/
 381                                 }
 382                         }
 383                         break;
 384                 }
 385                 case 'b':
 386 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 387                         errno = 0;
 388                         e = NULL;
 389                         lsockbufsize = strtoul(optarg, &e, 10);
 390                         sockbufsize = lsockbufsize;
 391                         if (errno || !*optarg || *e ||
 392                             sockbufsize != lsockbufsize)
 393                                 errx(1, "invalid socket buffer size");
 394 #else
 395                         errx(1,
 396 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 397 #endif
 398                         break;
 399                 case 'c':
 400                         npackets = strtol(optarg, &e, 10);
 401                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 402                                 errx(1,
 403                                     "illegal number of packets -- %s", optarg);
 404                         break;
 405                 case 'D':
 406                         options |= F_DONTFRAG;
 407                         break;
 408                 case 'd':
 409                         options |= F_SO_DEBUG;
 410                         break;
 411                 case 'f':
 412                         if (getuid()) {
 413                                 errno = EPERM;
 414                                 errx(1, "Must be superuser to flood ping");
 415                         }
 416                         options |= F_FLOOD;
 417                         setbuf(stdout, (char *)NULL);
 418                         break;
 419                 case 'g':
 420                         gateway = optarg;
 421                         break;
 422                 case 'H':
 423                         options |= F_HOSTNAME;
 424                         break;
 425                 case 'h':               /* hoplimit */
 426                         hoplimit = strtol(optarg, &e, 10);
 427                         if (*optarg == '\0' || *e != '\0')
 428                                 errx(1, "illegal hoplimit %s", optarg);
 429                         if (255 < hoplimit || hoplimit < -1)
 430                                 errx(1,
 431                                     "illegal hoplimit -- %s", optarg);
 432                         break;
 433                 case 'I':
 434                         ifname = optarg;
 435                         options |= F_INTERFACE;
 436 #ifndef USE_SIN6_SCOPE_ID
 437                         usepktinfo++;
 438 #endif
 439                         break;
 440                 case 'i':               /* wait between sending packets */
 441                         t = strtod(optarg, &e);
 442                         if (*optarg == '\0' || *e != '\0')
 443                                 errx(1, "illegal timing interval %s", optarg);
 444                         if (t < 1 && getuid()) {
 445                                 errx(1, "%s: only root may use interval < 1s",
 446                                     strerror(EPERM));
 447                         }
 448                         intvl.tv_sec = (long)t;
 449                         intvl.tv_usec =
 450                             (long)((t - intvl.tv_sec) * 1000000);
 451                         if (intvl.tv_sec < 0)
 452                                 errx(1, "illegal timing interval %s", optarg);
 453                         /* less than 1/hz does not make sense */
 454                         if (intvl.tv_sec == 0 && intvl.tv_usec < 1) {
 455                                 warnx("too small interval, raised to .000001");
 456                                 intvl.tv_usec = 1;
 457                         }
 458                         options |= F_INTERVAL;
 459                         break;
 460                 case 'l':
 461                         if (getuid()) {
 462                                 errno = EPERM;
 463                                 errx(1, "Must be superuser to preload");
 464                         }
 465                         preload = strtol(optarg, &e, 10);
 466                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 467                                 errx(1, "illegal preload value -- %s", optarg);
 468                         break;
 469                 case 'm':
 470 #ifdef IPV6_USE_MIN_MTU
 471                         mflag++;
 472                         break;
 473 #else
 474                         errx(1, "-%c is not supported on this platform", ch);
 475                         /*NOTREACHED*/
 476 #endif
 477                 case 'n':
 478                         options &= ~F_HOSTNAME;
 479                         break;
 480                 case 'N':
 481                         options |= F_NIGROUP;
 482                         nig_oldmcprefix++;
 483                         break;
 484                 case 'o':
 485                         options |= F_ONCE;
 486                         break;
 487                 case 'p':               /* fill buffer with user pattern */
 488                         options |= F_PINGFILLED;
 489                         fill((char *)datap, optarg);
 490                                 break;
 491                 case 'q':
 492                         options |= F_QUIET;
 493                         break;
 494                 case 'r':
 495                         options |= F_AUDIBLE;
 496                         break;
 497                 case 'R':
 498                         options |= F_MISSED;
 499                         break;
 500                 case 'S':
 501                         memset(&hints, 0, sizeof(struct addrinfo));
 502                         hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
 503                         hints.ai_family = AF_INET6;
 504                         hints.ai_socktype = SOCK_RAW;
 505                         hints.ai_protocol = IPPROTO_ICMPV6;
 506
 507                         error = getaddrinfo(optarg, NULL, &hints, &res);
 508                         if (error) {
 509                                 errx(1, "invalid source address: %s",
 510                                      gai_strerror(error));
 511                         }
 512                         /*
 513                          * res->ai_family must be AF_INET6 and res->ai_addrlen
 514                          * must be sizeof(src).
 515                          */
 516                         memcpy(&src, res->ai_addr, res->ai_addrlen);
 517                         srclen = res->ai_addrlen;
 518                         freeaddrinfo(res);
 519                         res = NULL;
 520                         options |= F_SRCADDR;
 521                         break;
 522                 case 's':               /* size of packet to send */
 523                         datalen = strtol(optarg, &e, 10);
 524                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 525                                 errx(1, "illegal datalen value -- %s", optarg);
 526                         if (datalen > MAXDATALEN) {
 527                                 errx(1,
 528                                     "datalen value too large, maximum is %d",
 529                                     MAXDATALEN);
 530                         }
 531                         break;
 532                 case 't':
 533                         options &= ~F_NOUSERDATA;
 534                         options |= F_SUPTYPES;
 535                         break;
 536                 case 'v':
 537                         options |= F_VERBOSE;
 538                         break;
 539                 case 'w':
 540                         options &= ~F_NOUSERDATA;
 541                         options |= F_FQDN;
 542                         break;
 543                 case 'W':
 544                         options &= ~F_NOUSERDATA;
 545                         options |= F_FQDNOLD;
 546                         break;
 547                 case 'x':
 548                         t = strtod(optarg, &e);
 549                         if (*e || e == optarg || t > (double)INT_MAX)
 550                                 err(EX_USAGE, "invalid timing interval: `%s'",
 551                                     optarg);
 552                         options |= F_WAITTIME;
 553                         waittime = (int)t;
 554                         break;
 555                 case 'X':
 556                         alarmtimeout = strtoul(optarg, &e, 0);
 557                         if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
 558                                 errx(EX_USAGE, "invalid timeout: `%s'",
 559                                     optarg);
 560                         if (alarmtimeout > MAXALARM)
 561                                 errx(EX_USAGE, "invalid timeout: `%s' > %d",
 562                                     optarg, MAXALARM);
 563                         alarm((int)alarmtimeout);
 564                         break;
 565 #ifdef IPSEC
 566 #ifdef IPSEC_POLICY_IPSEC
 567                 case 'P':
 568                         options |= F_POLICY;
 569                         if (!strncmp("in", optarg, 2)) {
 570                                 if ((policy_in = strdup(optarg)) == NULL)
 571                                         errx(1, "strdup");
 572                         } else if (!strncmp("out", optarg, 3)) {
 573                                 if ((policy_out = strdup(optarg)) == NULL)
 574                                         errx(1, "strdup");
 575                         } else
 576                                 errx(1, "invalid security policy");
 577                         break;
 578 #else
 579                 case 'A':
 580                         options |= F_AUTHHDR;
 581                         break;
 582                 case 'E':
 583                         options |= F_ENCRYPT;
 584                         break;
 585 #endif /*IPSEC_POLICY_IPSEC*/
 586 #endif /*IPSEC*/
 587                 default:
 588                         usage();
 589                         /*NOTREACHED*/
 590                 }
 591         }
 592
 593         argc -= optind;
 594         argv += optind;
 595
 596         if (argc < 1) {
 597                 usage();
 598                 /*NOTREACHED*/
 599         }
 600
 601         if (argc > 1) {
 602 #ifdef IPV6_RECVRTHDR   /* 2292bis */
 603                 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
 604                     argc - 1));
 605 #else  /* RFC2292 */
 606                 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
 607 #endif
 608                 if (rthlen == 0) {
 609                         errx(1, "too many intermediate hops");
 610                         /*NOTREACHED*/
 611                 }
 612                 ip6optlen += rthlen;
 613         }
 614
 615         if (options & F_NIGROUP) {
 616                 target = nigroup(argv[argc - 1], nig_oldmcprefix);
 617                 if (target == NULL) {
 618                         usage();
 619                         /*NOTREACHED*/
 620                 }
 621         } else
 622                 target = argv[argc - 1];
 623
 624         /* getaddrinfo */
 625         memset(&hints, 0, sizeof(struct addrinfo));
 626         hints.ai_flags = AI_CANONNAME;
 627         hints.ai_family = AF_INET6;
 628         hints.ai_socktype = SOCK_RAW;
 629         hints.ai_protocol = IPPROTO_ICMPV6;
 630
 631         error = getaddrinfo(target, NULL, &hints, &res);
 632         if (error)
 633                 errx(1, "%s", gai_strerror(error));
 634         if (res->ai_canonname)
 635                 hostname = res->ai_canonname;
 636         else
 637                 hostname = target;
 638
 639         if (!res->ai_addr)
 640                 errx(1, "getaddrinfo failed");
 641
 642         (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
 643
 644         if ((s = socket(res->ai_family, res->ai_socktype,
 645             res->ai_protocol)) < 0)
 646                 err(1, "socket");
 647
 648         /* set the source address if specified. */
 649         if ((options & F_SRCADDR) &&
 650             bind(s, (struct sockaddr *)&src, srclen) != 0) {
 651                 err(1, "bind");
 652         }
 653
 654         /* set the gateway (next hop) if specified */
 655         if (gateway) {
 656                 memset(&hints, 0, sizeof(hints));
 657                 hints.ai_family = AF_INET6;
 658                 hints.ai_socktype = SOCK_RAW;
 659                 hints.ai_protocol = IPPROTO_ICMPV6;
 660
 661                 error = getaddrinfo(gateway, NULL, &hints, &res);
 662                 if (error) {
 663                         errx(1, "getaddrinfo for the gateway %s: %s",
 664                              gateway, gai_strerror(error));
 665                 }
 666                 if (res->ai_next && (options & F_VERBOSE))
 667                         warnx("gateway resolves to multiple addresses");
 668
 669                 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
 670                     res->ai_addr, res->ai_addrlen)) {
 671                         err(1, "setsockopt(IPV6_NEXTHOP)");
 672                 }
 673
 674                 freeaddrinfo(res);
 675         }
 676
 677         /*
 678          * let the kerel pass extension headers of incoming packets,
 679          * for privileged socket options
 680          */
 681         if ((options & F_VERBOSE) != 0) {
 682                 int opton = 1;
 683
 684 #ifdef IPV6_RECVHOPOPTS
 685                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 686                     sizeof(opton)))
 687                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 688 #else  /* old adv. API */
 689                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 690                     sizeof(opton)))
 691                         err(1, "setsockopt(IPV6_HOPOPTS)");
 692 #endif
 693 #ifdef IPV6_RECVDSTOPTS
 694                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 695                     sizeof(opton)))
 696                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 697 #else  /* old adv. API */
 698                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 699                     sizeof(opton)))
 700                         err(1, "setsockopt(IPV6_DSTOPTS)");
 701 #endif
 702 #ifdef IPV6_RECVRTHDRDSTOPTS
 703                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 704                     sizeof(opton)))
 705                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 706 #endif
 707         }
 708
 709         /* revoke root privilege */
 710         if (seteuid(getuid()) != 0)
 711                 err(1, "seteuid() failed");
 712         if (setuid(getuid()) != 0)
 713                 err(1, "setuid() failed");
 714
 715         if ((options & F_FLOOD) && (options & F_INTERVAL))
 716                 errx(1, "-f and -i incompatible options");
 717
 718         if ((options & F_NOUSERDATA) == 0) {
 719                 if (datalen >= sizeof(struct tv32)) {
 720                         /* we can time transfer */
 721                         timing = 1;
 722                 } else
 723                         timing = 0;
 724                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 725                 if (options & F_VERBOSE)
 726                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 727                 else
 728                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 729         } else {
 730                 /* suppress timing for node information query */
 731                 timing = 0;
 732                 datalen = 2048;
 733                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 734         }
 735
 736         if (!(packet = (u_char *)malloc((u_int)packlen)))
 737                 err(1, "Unable to allocate packet");
 738         if (!(options & F_PINGFILLED))
 739                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 740                         *datap++ = i;
 741
 742         ident = getpid() & 0xFFFF;
 743         arc4random_buf(nonce, sizeof(nonce));
 744         optval = 1;
 745         if (options & F_DONTFRAG)
 746                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG,
 747                     &optval, sizeof(optval)) == -1)
 748                         err(1, "IPV6_DONTFRAG");
 749         hold = 1;
 750
 751         if (options & F_SO_DEBUG)
 752                 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 753                     sizeof(hold));
 754         optval = IPV6_DEFHLIM;
 755         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 756                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 757                     &optval, sizeof(optval)) == -1)
 758                         err(1, "IPV6_MULTICAST_HOPS");
 759 #ifdef IPV6_USE_MIN_MTU
 760         if (mflag != 1) {
 761                 optval = mflag > 1 ? 0 : 1;
 762
 763                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 764                     &optval, sizeof(optval)) == -1)
 765                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 766         }
 767 #ifdef IPV6_RECVPATHMTU
 768         else {
 769                 optval = 1;
 770                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 771                     &optval, sizeof(optval)) == -1)
 772                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 773         }
 774 #endif /* IPV6_RECVPATHMTU */
 775 #endif /* IPV6_USE_MIN_MTU */
 776
 777 #ifdef IPSEC
 778 #ifdef IPSEC_POLICY_IPSEC
 779         if (options & F_POLICY) {
 780                 if (setpolicy(s, policy_in) < 0)
 781                         errx(1, "%s", ipsec_strerror());
 782                 if (setpolicy(s, policy_out) < 0)
 783                         errx(1, "%s", ipsec_strerror());
 784         }
 785 #else
 786         if (options & F_AUTHHDR) {
 787                 optval = IPSEC_LEVEL_REQUIRE;
 788 #ifdef IPV6_AUTH_TRANS_LEVEL
 789                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 790                     &optval, sizeof(optval)) == -1)
 791                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 792 #else /* old def */
 793                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 794                     &optval, sizeof(optval)) == -1)
 795                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 796 #endif
 797         }
 798         if (options & F_ENCRYPT) {
 799                 optval = IPSEC_LEVEL_REQUIRE;
 800                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 801                     &optval, sizeof(optval)) == -1)
 802                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 803         }
 804 #endif /*IPSEC_POLICY_IPSEC*/
 805 #endif
 806
 807 #ifdef ICMP6_FILTER
 808     {
 809         struct icmp6_filter filt;
 810         if (!(options & F_VERBOSE)) {
 811                 ICMP6_FILTER_SETBLOCKALL(&filt);
 812                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 813                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 814                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 815                 else
 816                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 817         } else {
 818                 ICMP6_FILTER_SETPASSALL(&filt);
 819         }
 820         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 821             sizeof(filt)) < 0)
 822                 err(1, "setsockopt(ICMP6_FILTER)");
 823     }
 824 #endif /*ICMP6_FILTER*/
 825
 826         /* let the kerel pass extension headers of incoming packets */
 827         if ((options & F_VERBOSE) != 0) {
 828                 int opton = 1;
 829
 830 #ifdef IPV6_RECVRTHDR
 831                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 832                     sizeof(opton)))
 833                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 834 #else  /* old adv. API */
 835                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 836                     sizeof(opton)))
 837                         err(1, "setsockopt(IPV6_RTHDR)");
 838 #endif
 839         }
 840
 841 /*
 842         optval = 1;
 843         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 844                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 845                     &optval, sizeof(optval)) == -1)
 846                         err(1, "IPV6_MULTICAST_LOOP");
 847 */
 848
 849         /* Specify the outgoing interface and/or the source address */
 850         if (usepktinfo)
 851                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 852
 853         if (hoplimit != -1)
 854                 ip6optlen += CMSG_SPACE(sizeof(int));
 855
 856         /* set IP6 packet options */
 857         if (ip6optlen) {
 858                 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
 859                         errx(1, "can't allocate enough memory");
 860                 smsghdr.msg_control = (caddr_t)scmsg;
 861                 smsghdr.msg_controllen = ip6optlen;
 862                 scmsgp = (struct cmsghdr *)scmsg;
 863         }
 864         if (usepktinfo) {
 865                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 866                 memset(pktinfo, 0, sizeof(*pktinfo));
 867                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 868                 scmsgp->cmsg_level = IPPROTO_IPV6;
 869                 scmsgp->cmsg_type = IPV6_PKTINFO;
 870                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 871         }
 872
 873         /* set the outgoing interface */
 874         if (ifname) {
 875 #ifndef USE_SIN6_SCOPE_ID
 876                 /* pktinfo must have already been allocated */
 877                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 878                         errx(1, "%s: invalid interface name", ifname);
 879 #else
 880                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 881                         errx(1, "%s: invalid interface name", ifname);
 882 #endif
 883         }
 884         if (hoplimit != -1) {
 885                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 886                 scmsgp->cmsg_level = IPPROTO_IPV6;
 887                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 888                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 889
 890                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 891         }
 892
 893         if (argc > 1) { /* some intermediate addrs are specified */
 894                 int hops;
 895 #ifdef USE_RFC2292BIS
 896                 int rthdrlen;
 897 #endif
 898
 899 #ifdef USE_RFC2292BIS
 900                 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
 901                 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
 902                 scmsgp->cmsg_level = IPPROTO_IPV6;
 903                 scmsgp->cmsg_type = IPV6_RTHDR;
 904                 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
 905                 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
 906                     IPV6_RTHDR_TYPE_0, argc - 1);
 907                 if (rthdr == NULL)
 908                         errx(1, "can't initialize rthdr");
 909 #else  /* old advanced API */
 910                 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
 911                     IPV6_RTHDR_TYPE_0)) == 0)
 912                         errx(1, "can't initialize rthdr");
 913 #endif /* USE_RFC2292BIS */
 914
 915                 for (hops = 0; hops < argc - 1; hops++) {
 916                         memset(&hints, 0, sizeof(hints));
 917                         hints.ai_family = AF_INET6;
 918
 919                         if ((error = getaddrinfo(argv[hops], NULL, &hints,
 920                             &res)))
 921                                 errx(1, "%s", gai_strerror(error));
 922                         if (res->ai_addr->sa_family != AF_INET6)
 923                                 errx(1,
 924                                     "bad addr family of an intermediate addr");
 925                         sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
 926 #ifdef USE_RFC2292BIS
 927                         if (inet6_rth_add(rthdr, &sin6->sin6_addr))
 928                                 errx(1, "can't add an intermediate node");
 929 #else  /* old advanced API */
 930                         if (inet6_rthdr_add(scmsg, &sin6->sin6_addr,
 931                             IPV6_RTHDR_LOOSE))
 932                                 errx(1, "can't add an intermediate node");
 933 #endif /* USE_RFC2292BIS */
 934                         freeaddrinfo(res);
 935                 }
 936
 937 #ifndef USE_RFC2292BIS
 938                 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
 939                         errx(1, "can't set the last flag");
 940 #endif
 941
 942                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 943         }
 944
 945         if (!(options & F_SRCADDR)) {
 946                 /*
 947                  * get the source address. XXX since we revoked the root
 948                  * privilege, we cannot use a raw socket for this.
 949                  */
 950                 int dummy;
 951                 socklen_t len = sizeof(src);
 952
 953                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 954                         err(1, "UDP socket");
 955
 956                 src.sin6_family = AF_INET6;
 957                 src.sin6_addr = dst.sin6_addr;
 958                 src.sin6_port = ntohs(DUMMY_PORT);
 959                 src.sin6_scope_id = dst.sin6_scope_id;
 960
 961 #ifdef USE_RFC2292BIS
 962                 if (pktinfo &&
 963                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 964                     (void *)pktinfo, sizeof(*pktinfo)))
 965                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 966
 967                 if (hoplimit != -1 &&
 968                     setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 969                     (void *)&hoplimit, sizeof(hoplimit)))
 970                         err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
 971
 972                 if (hoplimit != -1 &&
 973                     setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 974                     (void *)&hoplimit, sizeof(hoplimit)))
 975                         err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
 976
 977                 if (rthdr &&
 978                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
 979                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
 980                         err(1, "UDP setsockopt(IPV6_RTHDR)");
 981 #else  /* old advanced API */
 982                 if (smsghdr.msg_control &&
 983                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
 984                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
 985                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
 986 #endif
 987
 988                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
 989                         err(1, "UDP connect");
 990
 991                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
 992                         err(1, "getsockname");
 993
 994                 close(dummy);
 995         }
 996
 997 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 998         if (sockbufsize) {
 999                 if (datalen > sockbufsize)
1000                         warnx("you need -b to increase socket buffer size");
1001                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
1002                     sizeof(sockbufsize)) < 0)
1003                         err(1, "setsockopt(SO_SNDBUF)");
1004                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
1005                     sizeof(sockbufsize)) < 0)
1006                         err(1, "setsockopt(SO_RCVBUF)");
1007         }
1008         else {
1009                 if (datalen > 8 * 1024) /*XXX*/
1010                         warnx("you need -b to increase socket buffer size");
1011                 /*
1012                  * When pinging the broadcast address, you can get a lot of
1013                  * answers. Doing something so evil is useful if you are trying
1014                  * to stress the ethernet, or just want to fill the arp cache
1015                  * to get some stuff for /etc/ethers.
1016                  */
1017                 hold = 48 * 1024;
1018                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
1019                     sizeof(hold));
1020         }
1021 #endif
1022
1023         optval = 1;
1024 #ifndef USE_SIN6_SCOPE_ID
1025 #ifdef IPV6_RECVPKTINFO
1026         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
1027             sizeof(optval)) < 0)
1028                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
1029 #else  /* old adv. API */
1030         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
1031             sizeof(optval)) < 0)
1032                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
1033 #endif
1034 #endif /* USE_SIN6_SCOPE_ID */
1035 #ifdef IPV6_RECVHOPLIMIT
1036         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
1037             sizeof(optval)) < 0)
1038                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
1039 #else  /* old adv. API */
1040         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
1041             sizeof(optval)) < 0)
1042                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
1043 #endif
1044
1045         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
1046             (unsigned long)(pingerlen() - 8));
1047         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
1048         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
1049
1050         if (preload == 0)
1051                 pinger();
1052         else {
1053                 if (npackets != 0 && preload > npackets)
1054                         preload = npackets;
1055                 while (preload--)
1056                         pinger();
1057         }
1058         gettimeofday(&last, NULL);
1059
1060         sigemptyset(&si_sa.sa_mask);
1061         si_sa.sa_flags = 0;
1062         si_sa.sa_handler = onsignal;
1063         if (sigaction(SIGINT, &si_sa, 0) == -1)
1064                 err(EX_OSERR, "sigaction SIGINT");
1065         seenint = 0;
1066 #ifdef SIGINFO
1067         if (sigaction(SIGINFO, &si_sa, 0) == -1)
1068                 err(EX_OSERR, "sigaction SIGINFO");
1069         seeninfo = 0;
1070 #endif
1071         if (alarmtimeout > 0) {
1072                 if (sigaction(SIGALRM, &si_sa, 0) == -1)
1073                         err(EX_OSERR, "sigaction SIGALRM");
1074         }
1075         if (options & F_FLOOD) {
1076                 intvl.tv_sec = 0;
1077                 intvl.tv_usec = 10000;
1078         } else if ((options & F_INTERVAL) == 0) {
1079                 intvl.tv_sec = interval / 1000;
1080                 intvl.tv_usec = interval % 1000 * 1000;
1081         }
1082
1083         almost_done = 0;
1084         while (seenint == 0) {
1085                 struct timeval now, timeout;
1086                 struct msghdr m;
1087                 struct iovec iov[2];
1088                 fd_set rfds;
1089                 int n;
1090
1091                 /* signal handling */
1092                 if (seenint)
1093                         onint(SIGINT);
1094 #ifdef SIGINFO
1095                 if (seeninfo) {
1096                         summary();
1097                         seeninfo = 0;
1098                         continue;
1099                 }
1100 #endif
1101                 FD_ZERO(&rfds);
1102                 FD_SET(s, &rfds);
1103                 gettimeofday(&now, NULL);
1104                 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
1105                 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
1106                 while (timeout.tv_usec < 0) {
1107                         timeout.tv_usec += 1000000;
1108                         timeout.tv_sec--;
1109                 }
1110                 while (timeout.tv_usec > 1000000) {
1111                         timeout.tv_usec -= 1000000;
1112                         timeout.tv_sec++;
1113                 }
1114                 if (timeout.tv_sec < 0)
1115                         timeout.tv_sec = timeout.tv_usec = 0;
1116
1117                 n = select(s + 1, &rfds, NULL, NULL, &timeout);
1118                 if (n < 0)
1119                         continue;       /* EINTR */
1120                 if (n == 1) {
1121                         m.msg_name = (caddr_t)&from;
1122                         m.msg_namelen = sizeof(from);
1123                         memset(&iov, 0, sizeof(iov));
1124                         iov[0].iov_base = (caddr_t)packet;
1125                         iov[0].iov_len = packlen;
1126                         m.msg_iov = iov;
1127                         m.msg_iovlen = 1;
1128                         memset(cm, 0, CONTROLLEN);
1129                         m.msg_control = (void *)cm;
1130                         m.msg_controllen = CONTROLLEN;
1131
1132                         cc = recvmsg(s, &m, 0);
1133                         if (cc < 0) {
1134                                 if (errno != EINTR) {
1135                                         warn("recvmsg");
1136                                         sleep(1);
1137                                 }
1138                                 continue;
1139                         } else if (cc == 0) {
1140                                 int mtu;
1141
1142                                 /*
1143                                  * receive control messages only. Process the
1144                                  * exceptions (currently the only possibility is
1145                                  * a path MTU notification.)
1146                                  */
1147                                 if ((mtu = get_pathmtu(&m)) > 0) {
1148                                         if ((options & F_VERBOSE) != 0) {
1149                                                 printf("new path MTU (%d) is "
1150                                                     "notified\n", mtu);
1151                                         }
1152                                 }
1153                                 continue;
1154                         } else {
1155                                 /*
1156                                  * an ICMPv6 message (probably an echoreply)
1157                                  * arrived.
1158                                  */
1159                                 pr_pack(packet, cc, &m);
1160                         }
1161                         if (((options & F_ONCE) != 0 && nreceived > 0) ||
1162                             (npackets > 0 && nreceived >= npackets))
1163                                 break;
1164                 }
1165                 if (n == 0 || (options & F_FLOOD)) {
1166                         if (npackets == 0 || ntransmitted < npackets)
1167                                 pinger();
1168                         else {
1169                                 if (almost_done)
1170                                         break;
1171                                 almost_done = 1;
1172                         /*
1173                          * If we're not transmitting any more packets,
1174                          * change the timer to wait two round-trip times
1175                          * if we've received any packets or (waittime)
1176                          * milliseconds if we haven't.
1177                          */
1178                                 intvl.tv_usec = 0;
1179                                 if (nreceived) {
1180                                         intvl.tv_sec = 2 * tmax / 1000;
1181                                         if (intvl.tv_sec == 0)
1182                                                 intvl.tv_sec = 1;
1183                                 } else {
1184                                         intvl.tv_sec = waittime / 1000;
1185                                         intvl.tv_usec = waittime % 1000 * 1000;
1186                                 }
1187                         }
1188                         gettimeofday(&last, NULL);
1189                         if (ntransmitted - nreceived - 1 > nmissedmax) {
1190                                 nmissedmax = ntransmitted - nreceived - 1;
1191                                 if (options & F_MISSED)
1192                                         (void)write(STDOUT_FILENO, &BBELL, 1);
1193                         }
1194                 }
1195         }
1196         sigemptyset(&si_sa.sa_mask);
1197         si_sa.sa_flags = 0;
1198         si_sa.sa_handler = SIG_IGN;
1199         sigaction(SIGINT, &si_sa, 0);
1200         sigaction(SIGALRM, &si_sa, 0);
1201         summary();
1202
1203         if (res != NULL)
1204                 freeaddrinfo(res);
1205
1206         if(packet != NULL)
1207                 free(packet);
1208
1209         exit(nreceived == 0 ? 2 : 0);
1210 }
1211
1212 void
1213 onsignal(int sig)
1214 {
1215
1216         switch (sig) {
1217         case SIGINT:
1218         case SIGALRM:
1219                 seenint++;
1220                 break;
1221 #ifdef SIGINFO
1222         case SIGINFO:
1223                 seeninfo++;
1224                 break;
1225 #endif
1226         }
1227 }
1228
1229 /*
1230  * pinger --
1231  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1232  * will be added on by the kernel.  The ID field is our UNIX process ID,
1233  * and the sequence number is an ascending integer.  The first 8 bytes
1234  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1235  * byte-order, to compute the round-trip time.
1236  */
1237 size_t
1238 pingerlen(void)
1239 {
1240         size_t l;
1241
1242         if (options & F_FQDN)
1243                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1244         else if (options & F_FQDNOLD)
1245                 l = ICMP6_NIQLEN;
1246         else if (options & F_NODEADDR)
1247                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1248         else if (options & F_SUPTYPES)
1249                 l = ICMP6_NIQLEN;
1250         else
1251                 l = ICMP6ECHOLEN + datalen;
1252
1253         return l;
1254 }
1255
1256 int
1257 pinger(void)
1258 {
1259         struct icmp6_hdr *icp;
1260         struct iovec iov[2];
1261         int i, cc;
1262         struct icmp6_nodeinfo *nip;
1263         int seq;
1264
1265         if (npackets && ntransmitted >= npackets)
1266                 return(-1);     /* no more transmission */
1267
1268         icp = (struct icmp6_hdr *)outpack;
1269         nip = (struct icmp6_nodeinfo *)outpack;
1270         memset(icp, 0, sizeof(*icp));
1271         icp->icmp6_cksum = 0;
1272         seq = ntransmitted++;
1273         CLR(seq % mx_dup_ck);
1274
1275         if (options & F_FQDN) {
1276                 icp->icmp6_type = ICMP6_NI_QUERY;
1277                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1278                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1279                 nip->ni_flags = htons(0);
1280
1281                 memcpy(nip->icmp6_ni_nonce, nonce,
1282                     sizeof(nip->icmp6_ni_nonce));
1283                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1284
1285                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1286                     sizeof(dst.sin6_addr));
1287                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1288                 datalen = 0;
1289         } else if (options & F_FQDNOLD) {
1290                 /* packet format in 03 draft - no Subject data on queries */
1291                 icp->icmp6_type = ICMP6_NI_QUERY;
1292                 icp->icmp6_code = 0;    /* code field is always 0 */
1293                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1294                 nip->ni_flags = htons(0);
1295
1296                 memcpy(nip->icmp6_ni_nonce, nonce,
1297                     sizeof(nip->icmp6_ni_nonce));
1298                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1299
1300                 cc = ICMP6_NIQLEN;
1301                 datalen = 0;
1302         } else if (options & F_NODEADDR) {
1303                 icp->icmp6_type = ICMP6_NI_QUERY;
1304                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1305                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1306                 nip->ni_flags = naflags;
1307
1308                 memcpy(nip->icmp6_ni_nonce, nonce,
1309                     sizeof(nip->icmp6_ni_nonce));
1310                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1311
1312                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1313                     sizeof(dst.sin6_addr));
1314                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1315                 datalen = 0;
1316         } else if (options & F_SUPTYPES) {
1317                 icp->icmp6_type = ICMP6_NI_QUERY;
1318                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1319                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1320                 /* we support compressed bitmap */
1321                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1322
1323                 memcpy(nip->icmp6_ni_nonce, nonce,
1324                     sizeof(nip->icmp6_ni_nonce));
1325                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1326                 cc = ICMP6_NIQLEN;
1327                 datalen = 0;
1328         } else {
1329                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1330                 icp->icmp6_code = 0;
1331                 icp->icmp6_id = htons(ident);
1332                 icp->icmp6_seq = ntohs(seq);
1333                 if (timing) {
1334                         struct timeval tv;
1335                         struct tv32 *tv32;
1336                         (void)gettimeofday(&tv, NULL);
1337                         tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1338                         tv32->tv32_sec = htonl(tv.tv_sec);
1339                         tv32->tv32_usec = htonl(tv.tv_usec);
1340                 }
1341                 cc = ICMP6ECHOLEN + datalen;
1342         }
1343
1344 #ifdef DIAGNOSTIC
1345         if (pingerlen() != cc)
1346                 errx(1, "internal error; length mismatch");
1347 #endif
1348
1349         smsghdr.msg_name = (caddr_t)&dst;
1350         smsghdr.msg_namelen = sizeof(dst);
1351         memset(&iov, 0, sizeof(iov));
1352         iov[0].iov_base = (caddr_t)outpack;
1353         iov[0].iov_len = cc;
1354         smsghdr.msg_iov = iov;
1355         smsghdr.msg_iovlen = 1;
1356
1357         i = sendmsg(s, &smsghdr, 0);
1358
1359         if (i < 0 || i != cc)  {
1360                 if (i < 0)
1361                         warn("sendmsg");
1362                 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1363                     hostname, cc, i);
1364         }
1365         if (!(options & F_QUIET) && options & F_FLOOD)
1366                 (void)write(STDOUT_FILENO, &DOT, 1);
1367
1368         return(0);
1369 }
1370
1371 int
1372 myechoreply(const struct icmp6_hdr *icp)
1373 {
1374         if (ntohs(icp->icmp6_id) == ident)
1375                 return 1;
1376         else
1377                 return 0;
1378 }
1379
1380 int
1381 mynireply(const struct icmp6_nodeinfo *nip)
1382 {
1383         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1384             nonce + sizeof(u_int16_t),
1385             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1386                 return 1;
1387         else
1388                 return 0;
1389 }
1390
1391 char *
1392 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1393         size_t bufsiz)
1394         /*base for compressed name*/
1395 {
1396         int i;
1397         const u_char *cp;
1398         char cresult[MAXDNAME + 1];
1399         const u_char *comp;
1400         int l;
1401
1402         cp = *sp;
1403         *buf = '\0';
1404
1405         if (cp >= ep)
1406                 return NULL;
1407         while (cp < ep) {
1408                 i = *cp;
1409                 if (i == 0 || cp != *sp) {
1410                         if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1411                                 return NULL;    /*result overrun*/
1412                 }
1413                 if (i == 0)
1414                         break;
1415                 cp++;
1416
1417                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1418                         /* DNS compression */
1419                         if (!base)
1420                                 return NULL;
1421
1422                         comp = base + (i & 0x3f);
1423                         if (dnsdecode(&comp, cp, base, cresult,
1424                             sizeof(cresult)) == NULL)
1425                                 return NULL;
1426                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1427                                 return NULL;    /*result overrun*/
1428                         break;
1429                 } else if ((i & 0x3f) == i) {
1430                         if (i > ep - cp)
1431                                 return NULL;    /*source overrun*/
1432                         while (i-- > 0 && cp < ep) {
1433                                 l = snprintf(cresult, sizeof(cresult),
1434                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1435                                 if (l >= sizeof(cresult) || l < 0)
1436                                         return NULL;
1437                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1438                                         return NULL;    /*result overrun*/
1439                                 cp++;
1440                         }
1441                 } else
1442                         return NULL;    /*invalid label*/
1443         }
1444         if (i != 0)
1445                 return NULL;    /*not terminated*/
1446         cp++;
1447         *sp = cp;
1448         return buf;
1449 }
1450
1451 /*
1452  * pr_pack --
1453  *      Print out the packet, if it came from us.  This logic is necessary
1454  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1455  * which arrive ('tis only fair).  This permits multiple copies of this
1456  * program to be run without having intermingled output (or statistics!).
1457  */
1458 void
1459 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1460 {
1461 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1462         struct icmp6_hdr *icp;
1463         struct icmp6_nodeinfo *ni;
1464         int i;
1465         int hoplim;
1466         struct sockaddr *from;
1467         int fromlen;
1468         u_char *cp = NULL, *dp, *end = buf + cc;
1469         struct in6_pktinfo *pktinfo = NULL;
1470         struct timeval tv, tp;
1471         struct tv32 *tpp;
1472         double triptime = 0;
1473         int dupflag;
1474         size_t off;
1475         int oldfqdn;
1476         u_int16_t seq;
1477         char dnsname[MAXDNAME + 1];
1478
1479         (void)gettimeofday(&tv, NULL);
1480
1481         if (!mhdr || !mhdr->msg_name ||
1482             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1483             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1484                 if (options & F_VERBOSE)
1485                         warnx("invalid peername");
1486                 return;
1487         }
1488         from = (struct sockaddr *)mhdr->msg_name;
1489         fromlen = mhdr->msg_namelen;
1490         if (cc < sizeof(struct icmp6_hdr)) {
1491                 if (options & F_VERBOSE)
1492                         warnx("packet too short (%d bytes) from %s", cc,
1493                             pr_addr(from, fromlen));
1494                 return;
1495         }
1496         if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1497             (options & F_VERBOSE) != 0)
1498                 warnx("some control data discarded, insufficient buffer size");
1499         icp = (struct icmp6_hdr *)buf;
1500         ni = (struct icmp6_nodeinfo *)buf;
1501         off = 0;
1502
1503         if ((hoplim = get_hoplim(mhdr)) == -1) {
1504                 warnx("failed to get receiving hop limit");
1505                 return;
1506         }
1507         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1508                 warnx("failed to get receiving packet information");
1509                 return;
1510         }
1511
1512         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1513                 seq = ntohs(icp->icmp6_seq);
1514                 ++nreceived;
1515                 if (timing) {
1516                         tpp = (struct tv32 *)(icp + 1);
1517                         tp.tv_sec = ntohl(tpp->tv32_sec);
1518                         tp.tv_usec = ntohl(tpp->tv32_usec);
1519                         tvsub(&tv, &tp);
1520                         triptime = ((double)tv.tv_sec) * 1000.0 +
1521                             ((double)tv.tv_usec) / 1000.0;
1522                         tsum += triptime;
1523                         tsumsq += triptime * triptime;
1524                         if (triptime < tmin)
1525                                 tmin = triptime;
1526                         if (triptime > tmax)
1527                                 tmax = triptime;
1528                 }
1529
1530                 if (TST(seq % mx_dup_ck)) {
1531                         ++nrepeats;
1532                         --nreceived;
1533                         dupflag = 1;
1534                 } else {
1535                         SET(seq % mx_dup_ck);
1536                         dupflag = 0;
1537                 }
1538
1539                 if (options & F_QUIET)
1540                         return;
1541
1542                 if (options & F_WAITTIME && triptime > waittime) {
1543                         ++nrcvtimeout;
1544                         return;
1545                 }
1546
1547                 if (options & F_FLOOD)
1548                         (void)write(STDOUT_FILENO, &BSPACE, 1);
1549                 else {
1550                         if (options & F_AUDIBLE)
1551                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1552                         (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1553                             pr_addr(from, fromlen), seq);
1554                         (void)printf(" hlim=%d", hoplim);
1555                         if ((options & F_VERBOSE) != 0) {
1556                                 struct sockaddr_in6 dstsa;
1557
1558                                 memset(&dstsa, 0, sizeof(dstsa));
1559                                 dstsa.sin6_family = AF_INET6;
1560                                 dstsa.sin6_len = sizeof(dstsa);
1561                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1562                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1563                                 (void)printf(" dst=%s",
1564                                     pr_addr((struct sockaddr *)&dstsa,
1565                                     sizeof(dstsa)));
1566                         }
1567                         if (timing)
1568                                 (void)printf(" time=%.3f ms", triptime);
1569                         if (dupflag)
1570                                 (void)printf("(DUP!)");
1571                         /* check the data */
1572                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1573                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1574                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1575                                 if (*cp != *dp) {
1576                                         (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1577                                         break;
1578                                 }
1579                         }
1580                 }
1581         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1582                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1583                 ++nreceived;
1584                 if (TST(seq % mx_dup_ck)) {
1585                         ++nrepeats;
1586                         --nreceived;
1587                         dupflag = 1;
1588                 } else {
1589                         SET(seq % mx_dup_ck);
1590                         dupflag = 0;
1591                 }
1592
1593                 if (options & F_QUIET)
1594                         return;
1595
1596                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1597
1598                 switch (ntohs(ni->ni_code)) {
1599                 case ICMP6_NI_SUCCESS:
1600                         break;
1601                 case ICMP6_NI_REFUSED:
1602                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1603                         goto fqdnend;
1604                 case ICMP6_NI_UNKNOWN:
1605                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1606                         goto fqdnend;
1607                 default:
1608                         printf("unknown code 0x%x, type 0x%x",
1609                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1610                         goto fqdnend;
1611                 }
1612
1613                 switch (ntohs(ni->ni_qtype)) {
1614                 case NI_QTYPE_NOOP:
1615                         printf("NodeInfo NOOP");
1616                         break;
1617                 case NI_QTYPE_SUPTYPES:
1618                         pr_suptypes(ni, end - (u_char *)ni);
1619                         break;
1620                 case NI_QTYPE_NODEADDR:
1621                         pr_nodeaddr(ni, end - (u_char *)ni);
1622                         break;
1623                 case NI_QTYPE_FQDN:
1624                 default:        /* XXX: for backward compatibility */
1625                         cp = (u_char *)ni + ICMP6_NIRLEN;
1626                         if (buf[off + ICMP6_NIRLEN] ==
1627                             cc - off - ICMP6_NIRLEN - 1)
1628                                 oldfqdn = 1;
1629                         else
1630                                 oldfqdn = 0;
1631                         if (oldfqdn) {
1632                                 cp++;   /* skip length */
1633                                 while (cp < end) {
1634                                         safeputc(*cp & 0xff);
1635                                         cp++;
1636                                 }
1637                         } else {
1638                                 i = 0;
1639                                 while (cp < end) {
1640                                         if (dnsdecode((const u_char **)&cp, end,
1641                                             (const u_char *)(ni + 1), dnsname,
1642                                             sizeof(dnsname)) == NULL) {
1643                                                 printf("???");
1644                                                 break;
1645                                         }
1646                                         /*
1647                                          * name-lookup special handling for
1648                                          * truncated name
1649                                          */
1650                                         if (cp + 1 <= end && !*cp &&
1651                                             strlen(dnsname) > 0) {
1652                                                 dnsname[strlen(dnsname) - 1] = '\0';
1653                                                 cp++;
1654                                         }
1655                                         printf("%s%s", i > 0 ? "," : "",
1656                                             dnsname);
1657                                 }
1658                         }
1659                         if (options & F_VERBOSE) {
1660                                 int32_t ttl;
1661                                 int comma = 0;
1662
1663                                 (void)printf(" (");     /*)*/
1664
1665                                 switch (ni->ni_code) {
1666                                 case ICMP6_NI_REFUSED:
1667                                         (void)printf("refused");
1668                                         comma++;
1669                                         break;
1670                                 case ICMP6_NI_UNKNOWN:
1671                                         (void)printf("unknown qtype");
1672                                         comma++;
1673                                         break;
1674                                 }
1675
1676                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1677                                         /* case of refusion, unknown */
1678                                         /*(*/
1679                                         putchar(')');
1680                                         goto fqdnend;
1681                                 }
1682                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1683                                 if (comma)
1684                                         printf(",");
1685                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1686                                         (void)printf("TTL=%d:meaningless",
1687                                             (int)ttl);
1688                                 } else {
1689                                         if (ttl < 0) {
1690                                                 (void)printf("TTL=%d:invalid",
1691                                                    ttl);
1692                                         } else
1693                                                 (void)printf("TTL=%d", ttl);
1694                                 }
1695                                 comma++;
1696
1697                                 if (oldfqdn) {
1698                                         if (comma)
1699                                                 printf(",");
1700                                         printf("03 draft");
1701                                         comma++;
1702                                 } else {
1703                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1704                                         if (cp == end) {
1705                                                 if (comma)
1706                                                         printf(",");
1707                                                 printf("no name");
1708                                                 comma++;
1709                                         }
1710                                 }
1711
1712                                 if (buf[off + ICMP6_NIRLEN] !=
1713                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1714                                         if (comma)
1715                                                 printf(",");
1716                                         (void)printf("invalid namelen:%d/%lu",
1717                                             buf[off + ICMP6_NIRLEN],
1718                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1719                                         comma++;
1720                                 }
1721                                 /*(*/
1722                                 putchar(')');
1723                         }
1724                 fqdnend:
1725                         ;
1726                 }
1727         } else {
1728                 /* We've got something other than an ECHOREPLY */
1729                 if (!(options & F_VERBOSE))
1730                         return;
1731                 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1732                 pr_icmph(icp, end);
1733         }
1734
1735         if (!(options & F_FLOOD)) {
1736                 (void)putchar('\n');
1737                 if (options & F_VERBOSE)
1738                         pr_exthdrs(mhdr);
1739                 (void)fflush(stdout);
1740         }
1741 #undef safeputc
1742 }
1743
1744 void
1745 pr_exthdrs(struct msghdr *mhdr)
1746 {
1747         ssize_t bufsize;
1748         void    *bufp;
1749         struct cmsghdr *cm;
1750
1751         bufsize = 0;
1752         bufp = mhdr->msg_control;
1753         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1754              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1755                 if (cm->cmsg_level != IPPROTO_IPV6)
1756                         continue;
1757
1758                 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1759                 if (bufsize <= 0)
1760                         continue;
1761                 switch (cm->cmsg_type) {
1762                 case IPV6_HOPOPTS:
1763                         printf("  HbH Options: ");
1764                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1765                         break;
1766                 case IPV6_DSTOPTS:
1767 #ifdef IPV6_RTHDRDSTOPTS
1768                 case IPV6_RTHDRDSTOPTS:
1769 #endif
1770                         printf("  Dst Options: ");
1771                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1772                         break;
1773                 case IPV6_RTHDR:
1774                         printf("  Routing: ");
1775                         pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1776                         break;
1777                 }
1778         }
1779 }
1780
1781 #ifdef USE_RFC2292BIS
1782 void
1783 pr_ip6opt(void *extbuf, size_t bufsize)
1784 {
1785         struct ip6_hbh *ext;
1786         int currentlen;
1787         u_int8_t type;
1788         socklen_t extlen, len;
1789         void *databuf;
1790         size_t offset;
1791         u_int16_t value2;
1792         u_int32_t value4;
1793
1794         ext = (struct ip6_hbh *)extbuf;
1795         extlen = (ext->ip6h_len + 1) * 8;
1796         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1797             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1798
1799         /*
1800          * Bounds checking on the ancillary data buffer:
1801          *     subtract the size of a cmsg structure from the buffer size.
1802          */
1803         if (bufsize < (extlen  + CMSG_SPACE(0))) {
1804                 extlen = bufsize - CMSG_SPACE(0);
1805                 warnx("options truncated, showing only %u (total=%u)",
1806                     (unsigned int)(extlen / 8 - 1),
1807                     (unsigned int)(ext->ip6h_len));
1808         }
1809
1810         currentlen = 0;
1811         while (1) {
1812                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1813                     &type, &len, &databuf);
1814                 if (currentlen == -1)
1815                         break;
1816                 switch (type) {
1817                 /*
1818                  * Note that inet6_opt_next automatically skips any padding
1819                  * optins.
1820                  */
1821                 case IP6OPT_JUMBO:
1822                         offset = 0;
1823                         offset = inet6_opt_get_val(databuf, offset,
1824                             &value4, sizeof(value4));
1825                         printf("    Jumbo Payload Opt: Length %u\n",
1826                             (u_int32_t)ntohl(value4));
1827                         break;
1828                 case IP6OPT_ROUTER_ALERT:
1829                         offset = 0;
1830                         offset = inet6_opt_get_val(databuf, offset,
1831                                                    &value2, sizeof(value2));
1832                         printf("    Router Alert Opt: Type %u\n",
1833                             ntohs(value2));
1834                         break;
1835                 default:
1836                         printf("    Received Opt %u len %lu\n",
1837                             type, (unsigned long)len);
1838                         break;
1839                 }
1840         }
1841         return;
1842 }
1843 #else  /* !USE_RFC2292BIS */
1844 /* ARGSUSED */
1845 void
1846 pr_ip6opt(void *extbuf, size_t bufsize __unused)
1847 {
1848         putchar('\n');
1849         return;
1850 }
1851 #endif /* USE_RFC2292BIS */
1852
1853 #ifdef USE_RFC2292BIS
1854 void
1855 pr_rthdr(void *extbuf, size_t bufsize)
1856 {
1857         struct in6_addr *in6;
1858         char ntopbuf[INET6_ADDRSTRLEN];
1859         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1860         int i, segments, origsegs, rthsize, size0, size1;
1861
1862         /* print fixed part of the header */
1863         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1864             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1865         if ((segments = inet6_rth_segments(extbuf)) >= 0) {
1866                 printf("%d segments, ", segments);
1867                 printf("%d left\n", rh->ip6r_segleft);
1868         } else {
1869                 printf("segments unknown, ");
1870                 printf("%d left\n", rh->ip6r_segleft);
1871                 return;
1872         }
1873
1874         /*
1875          * Bounds checking on the ancillary data buffer. When calculating
1876          * the number of items to show keep in mind:
1877          *      - The size of the cmsg structure
1878          *      - The size of one segment (the size of a Type 0 routing header)
1879          *      - When dividing add a fudge factor of one in case the
1880          *        dividend is not evenly divisible by the divisor
1881          */
1882         rthsize = (rh->ip6r_len + 1) * 8;
1883         if (bufsize < (rthsize + CMSG_SPACE(0))) {
1884                 origsegs = segments;
1885                 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
1886                 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
1887                 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
1888                     (size1 - size0) + 1;
1889                 warnx("segments truncated, showing only %d (total=%d)",
1890                     segments, origsegs);
1891         }
1892
1893         for (i = 0; i < segments; i++) {
1894                 in6 = inet6_rth_getaddr(extbuf, i);
1895                 if (in6 == NULL)
1896                         printf("   [%d]<NULL>\n", i);
1897                 else {
1898                         if (!inet_ntop(AF_INET6, in6, ntopbuf,
1899                             sizeof(ntopbuf)))
1900                                 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1901                         printf("   [%d]%s\n", i, ntopbuf);
1902                 }
1903         }
1904
1905         return;
1906
1907 }
1908
1909 #else  /* !USE_RFC2292BIS */
1910 /* ARGSUSED */
1911 void
1912 pr_rthdr(void *extbuf, size_t bufsize __unused)
1913 {
1914         putchar('\n');
1915         return;
1916 }
1917 #endif /* USE_RFC2292BIS */
1918
1919 int
1920 pr_bitrange(u_int32_t v, int soff, int ii)
1921 {
1922         int off;
1923         int i;
1924
1925         off = 0;
1926         while (off < 32) {
1927                 /* shift till we have 0x01 */
1928                 if ((v & 0x01) == 0) {
1929                         if (ii > 1)
1930                                 printf("-%u", soff + off - 1);
1931                         ii = 0;
1932                         switch (v & 0x0f) {
1933                         case 0x00:
1934                                 v >>= 4;
1935                                 off += 4;
1936                                 continue;
1937                         case 0x08:
1938                                 v >>= 3;
1939                                 off += 3;
1940                                 continue;
1941                         case 0x04: case 0x0c:
1942                                 v >>= 2;
1943                                 off += 2;
1944                                 continue;
1945                         default:
1946                                 v >>= 1;
1947                                 off += 1;
1948                                 continue;
1949                         }
1950                 }
1951
1952                 /* we have 0x01 with us */
1953                 for (i = 0; i < 32 - off; i++) {
1954                         if ((v & (0x01 << i)) == 0)
1955                                 break;
1956                 }
1957                 if (!ii)
1958                         printf(" %u", soff + off);
1959                 ii += i;
1960                 v >>= i; off += i;
1961         }
1962         return ii;
1963 }
1964
1965 void
1966 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1967         /* ni->qtype must be SUPTYPES */
1968 {
1969         size_t clen;
1970         u_int32_t v;
1971         const u_char *cp, *end;
1972         u_int16_t cur;
1973         struct cbit {
1974                 u_int16_t words;        /*32bit count*/
1975                 u_int16_t skip;
1976         } cbit;
1977 #define MAXQTYPES       (1 << 16)
1978         size_t off;
1979         int b;
1980
1981         cp = (u_char *)(ni + 1);
1982         end = ((u_char *)ni) + nilen;
1983         cur = 0;
1984         b = 0;
1985
1986         printf("NodeInfo Supported Qtypes");
1987         if (options & F_VERBOSE) {
1988                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
1989                         printf(", compressed bitmap");
1990                 else
1991                         printf(", raw bitmap");
1992         }
1993
1994         while (cp < end) {
1995                 clen = (size_t)(end - cp);
1996                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
1997                         if (clen == 0 || clen > MAXQTYPES / 8 ||
1998                             clen % sizeof(v)) {
1999                                 printf("???");
2000                                 return;
2001                         }
2002                 } else {
2003                         if (clen < sizeof(cbit) || clen % sizeof(v))
2004                                 return;
2005                         memcpy(&cbit, cp, sizeof(cbit));
2006                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2007                             clen)
2008                                 return;
2009                         cp += sizeof(cbit);
2010                         clen = ntohs(cbit.words) * sizeof(v);
2011                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
2012                             MAXQTYPES)
2013                                 return;
2014                 }
2015
2016                 for (off = 0; off < clen; off += sizeof(v)) {
2017                         memcpy(&v, cp + off, sizeof(v));
2018                         v = (u_int32_t)ntohl(v);
2019                         b = pr_bitrange(v, (int)(cur + off * 8), b);
2020                 }
2021                 /* flush the remaining bits */
2022                 b = pr_bitrange(0, (int)(cur + off * 8), b);
2023
2024                 cp += clen;
2025                 cur += clen * 8;
2026                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2027                         cur += ntohs(cbit.skip) * 32;
2028         }
2029 }
2030
2031 void
2032 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
2033         /* ni->qtype must be NODEADDR */
2034 {
2035         u_char *cp = (u_char *)(ni + 1);
2036         char ntop_buf[INET6_ADDRSTRLEN];
2037         int withttl = 0;
2038
2039         nilen -= sizeof(struct icmp6_nodeinfo);
2040
2041         if (options & F_VERBOSE) {
2042                 switch (ni->ni_code) {
2043                 case ICMP6_NI_REFUSED:
2044                         (void)printf("refused");
2045                         break;
2046                 case ICMP6_NI_UNKNOWN:
2047                         (void)printf("unknown qtype");
2048                         break;
2049                 }
2050                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2051                         (void)printf(" truncated");
2052         }
2053         putchar('\n');
2054         if (nilen <= 0)
2055                 printf("  no address\n");
2056
2057         /*
2058          * In icmp-name-lookups 05 and later, TTL of each returned address
2059          * is contained in the resposne. We try to detect the version
2060          * by the length of the data, but note that the detection algorithm
2061          * is incomplete. We assume the latest draft by default.
2062          */
2063         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
2064                 withttl = 1;
2065         while (nilen > 0) {
2066                 u_int32_t ttl;
2067
2068                 if (withttl) {
2069                         /* XXX: alignment? */
2070                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
2071                         cp += sizeof(u_int32_t);
2072                         nilen -= sizeof(u_int32_t);
2073                 }
2074
2075                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2076                     NULL)
2077                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2078                 printf("  %s", ntop_buf);
2079                 if (withttl) {
2080                         if (ttl == 0xffffffff) {
2081                                 /*
2082                                  * XXX: can this convention be applied to all
2083                                  * type of TTL (i.e. non-ND TTL)?
2084                                  */
2085                                 printf("(TTL=infty)");
2086                         }
2087                         else
2088                                 printf("(TTL=%u)", ttl);
2089                 }
2090                 putchar('\n');
2091
2092                 nilen -= sizeof(struct in6_addr);
2093                 cp += sizeof(struct in6_addr);
2094         }
2095 }
2096
2097 int
2098 get_hoplim(struct msghdr *mhdr)
2099 {
2100         struct cmsghdr *cm;
2101
2102         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2103              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2104                 if (cm->cmsg_len == 0)
2105                         return(-1);
2106
2107                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2108                     cm->cmsg_type == IPV6_HOPLIMIT &&
2109                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
2110                         return(*(int *)CMSG_DATA(cm));
2111         }
2112
2113         return(-1);
2114 }
2115
2116 struct in6_pktinfo *
2117 get_rcvpktinfo(struct msghdr *mhdr)
2118 {
2119         struct cmsghdr *cm;
2120
2121         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2122              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2123                 if (cm->cmsg_len == 0)
2124                         return(NULL);
2125
2126                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2127                     cm->cmsg_type == IPV6_PKTINFO &&
2128                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2129                         return((struct in6_pktinfo *)CMSG_DATA(cm));
2130         }
2131
2132         return(NULL);
2133 }
2134
2135 int
2136 get_pathmtu(struct msghdr *mhdr)
2137 {
2138 #ifdef IPV6_RECVPATHMTU
2139         struct cmsghdr *cm;
2140         struct ip6_mtuinfo *mtuctl = NULL;
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(0);
2146
2147                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2148                     cm->cmsg_type == IPV6_PATHMTU &&
2149                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2150                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2151
2152                         /*
2153                          * If the notified destination is different from
2154                          * the one we are pinging, just ignore the info.
2155                          * We check the scope ID only when both notified value
2156                          * and our own value have non-0 values, because we may
2157                          * have used the default scope zone ID for sending,
2158                          * in which case the scope ID value is 0.
2159                          */
2160                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2161                                                 &dst.sin6_addr) ||
2162                             (mtuctl->ip6m_addr.sin6_scope_id &&
2163                              dst.sin6_scope_id &&
2164                              mtuctl->ip6m_addr.sin6_scope_id !=
2165                              dst.sin6_scope_id)) {
2166                                 if ((options & F_VERBOSE) != 0) {
2167                                         printf("path MTU for %s is notified. "
2168                                                "(ignored)\n",
2169                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2170                                            sizeof(mtuctl->ip6m_addr)));
2171                                 }
2172                                 return(0);
2173                         }
2174
2175                         /*
2176                          * Ignore an invalid MTU. XXX: can we just believe
2177                          * the kernel check?
2178                          */
2179                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2180                                 return(0);
2181
2182                         /* notification for our destination. return the MTU. */
2183                         return((int)mtuctl->ip6m_mtu);
2184                 }
2185         }
2186 #endif
2187         return(0);
2188 }
2189
2190 /*
2191  * tvsub --
2192  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2193  * be >= in.
2194  */
2195 void
2196 tvsub(struct timeval *out, struct timeval *in)
2197 {
2198         if ((out->tv_usec -= in->tv_usec) < 0) {
2199                 --out->tv_sec;
2200                 out->tv_usec += 1000000;
2201         }
2202         out->tv_sec -= in->tv_sec;
2203 }
2204
2205 /*
2206  * onint --
2207  *      SIGINT handler.
2208  */
2209 /* ARGSUSED */
2210 void
2211 onint(int notused __unused)
2212 {
2213         /*
2214          * When doing reverse DNS lookups, the seenint flag might not
2215          * be noticed for a while.  Just exit if we get a second SIGINT.
2216          */
2217         if ((options & F_HOSTNAME) && seenint != 0)
2218                 _exit(nreceived ? 0 : 2);
2219 }
2220
2221 /*
2222  * summary --
2223  *      Print out statistics.
2224  */
2225 void
2226 summary(void)
2227 {
2228
2229         (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2230         (void)printf("%ld packets transmitted, ", ntransmitted);
2231         (void)printf("%ld packets received, ", nreceived);
2232         if (nrepeats)
2233                 (void)printf("+%ld duplicates, ", nrepeats);
2234         if (ntransmitted) {
2235                 if (nreceived > ntransmitted)
2236                         (void)printf("-- somebody's duplicating packets!");
2237                 else
2238                         (void)printf("%.1f%% packet loss",
2239                             ((((double)ntransmitted - nreceived) * 100.0) /
2240                             ntransmitted));
2241         }
2242         if (nrcvtimeout)
2243                 printf(", %ld packets out of wait time", nrcvtimeout);
2244         (void)putchar('\n');
2245         if (nreceived && timing) {
2246                 /* Only display average to microseconds */
2247                 double num = nreceived + nrepeats;
2248                 double avg = tsum / num;
2249                 double dev = sqrt(tsumsq / num - avg * avg);
2250                 (void)printf(
2251                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2252                     tmin, avg, tmax, dev);
2253                 (void)fflush(stdout);
2254         }
2255         (void)fflush(stdout);
2256 }
2257
2258 /*subject type*/
2259 static const char *niqcode[] = {
2260         "IPv6 address",
2261         "DNS label",    /*or empty*/
2262         "IPv4 address",
2263 };
2264
2265 /*result code*/
2266 static const char *nircode[] = {
2267         "Success", "Refused", "Unknown",
2268 };
2269
2270
2271 /*
2272  * pr_icmph --
2273  *      Print a descriptive string about an ICMP header.
2274  */
2275 void
2276 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2277 {
2278         char ntop_buf[INET6_ADDRSTRLEN];
2279         struct nd_redirect *red;
2280         struct icmp6_nodeinfo *ni;
2281         char dnsname[MAXDNAME + 1];
2282         const u_char *cp;
2283         size_t l;
2284
2285         switch (icp->icmp6_type) {
2286         case ICMP6_DST_UNREACH:
2287                 switch (icp->icmp6_code) {
2288                 case ICMP6_DST_UNREACH_NOROUTE:
2289                         (void)printf("No Route to Destination\n");
2290                         break;
2291                 case ICMP6_DST_UNREACH_ADMIN:
2292                         (void)printf("Destination Administratively "
2293                             "Unreachable\n");
2294                         break;
2295                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2296                         (void)printf("Destination Unreachable Beyond Scope\n");
2297                         break;
2298                 case ICMP6_DST_UNREACH_ADDR:
2299                         (void)printf("Destination Host Unreachable\n");
2300                         break;
2301                 case ICMP6_DST_UNREACH_NOPORT:
2302                         (void)printf("Destination Port Unreachable\n");
2303                         break;
2304                 default:
2305                         (void)printf("Destination Unreachable, Bad Code: %d\n",
2306                             icp->icmp6_code);
2307                         break;
2308                 }
2309                 /* Print returned IP header information */
2310                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2311                 break;
2312         case ICMP6_PACKET_TOO_BIG:
2313                 (void)printf("Packet too big mtu = %d\n",
2314                     (int)ntohl(icp->icmp6_mtu));
2315                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2316                 break;
2317         case ICMP6_TIME_EXCEEDED:
2318                 switch (icp->icmp6_code) {
2319                 case ICMP6_TIME_EXCEED_TRANSIT:
2320                         (void)printf("Time to live exceeded\n");
2321                         break;
2322                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2323                         (void)printf("Frag reassembly time exceeded\n");
2324                         break;
2325                 default:
2326                         (void)printf("Time exceeded, Bad Code: %d\n",
2327                             icp->icmp6_code);
2328                         break;
2329                 }
2330                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2331                 break;
2332         case ICMP6_PARAM_PROB:
2333                 (void)printf("Parameter problem: ");
2334                 switch (icp->icmp6_code) {
2335                 case ICMP6_PARAMPROB_HEADER:
2336                         (void)printf("Erroneous Header ");
2337                         break;
2338                 case ICMP6_PARAMPROB_NEXTHEADER:
2339                         (void)printf("Unknown Nextheader ");
2340                         break;
2341                 case ICMP6_PARAMPROB_OPTION:
2342                         (void)printf("Unrecognized Option ");
2343                         break;
2344                 default:
2345                         (void)printf("Bad code(%d) ", icp->icmp6_code);
2346                         break;
2347                 }
2348                 (void)printf("pointer = 0x%02x\n",
2349                     (u_int32_t)ntohl(icp->icmp6_pptr));
2350                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2351                 break;
2352         case ICMP6_ECHO_REQUEST:
2353                 (void)printf("Echo Request");
2354                 /* XXX ID + Seq + Data */
2355                 break;
2356         case ICMP6_ECHO_REPLY:
2357                 (void)printf("Echo Reply");
2358                 /* XXX ID + Seq + Data */
2359                 break;
2360         case ICMP6_MEMBERSHIP_QUERY:
2361                 (void)printf("Listener Query");
2362                 break;
2363         case ICMP6_MEMBERSHIP_REPORT:
2364                 (void)printf("Listener Report");
2365                 break;
2366         case ICMP6_MEMBERSHIP_REDUCTION:
2367                 (void)printf("Listener Done");
2368                 break;
2369         case ND_ROUTER_SOLICIT:
2370                 (void)printf("Router Solicitation");
2371                 break;
2372         case ND_ROUTER_ADVERT:
2373                 (void)printf("Router Advertisement");
2374                 break;
2375         case ND_NEIGHBOR_SOLICIT:
2376                 (void)printf("Neighbor Solicitation");
2377                 break;
2378         case ND_NEIGHBOR_ADVERT:
2379                 (void)printf("Neighbor Advertisement");
2380                 break;
2381         case ND_REDIRECT:
2382                 red = (struct nd_redirect *)icp;
2383                 (void)printf("Redirect\n");
2384                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2385                     sizeof(ntop_buf)))
2386                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2387                 (void)printf("Destination: %s", ntop_buf);
2388                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2389                     sizeof(ntop_buf)))
2390                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2391                 (void)printf(" New Target: %s", ntop_buf);
2392                 break;
2393         case ICMP6_NI_QUERY:
2394                 (void)printf("Node Information Query");
2395                 /* XXX ID + Seq + Data */
2396                 ni = (struct icmp6_nodeinfo *)icp;
2397                 l = end - (u_char *)(ni + 1);
2398                 printf(", ");
2399                 switch (ntohs(ni->ni_qtype)) {
2400                 case NI_QTYPE_NOOP:
2401                         (void)printf("NOOP");
2402                         break;
2403                 case NI_QTYPE_SUPTYPES:
2404                         (void)printf("Supported qtypes");
2405                         break;
2406                 case NI_QTYPE_FQDN:
2407                         (void)printf("DNS name");
2408                         break;
2409                 case NI_QTYPE_NODEADDR:
2410                         (void)printf("nodeaddr");
2411                         break;
2412                 case NI_QTYPE_IPV4ADDR:
2413                         (void)printf("IPv4 nodeaddr");
2414                         break;
2415                 default:
2416                         (void)printf("unknown qtype");
2417                         break;
2418                 }
2419                 if (options & F_VERBOSE) {
2420                         switch (ni->ni_code) {
2421                         case ICMP6_NI_SUBJ_IPV6:
2422                                 if (l == sizeof(struct in6_addr) &&
2423                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2424                                     sizeof(ntop_buf)) != NULL) {
2425                                         (void)printf(", subject=%s(%s)",
2426                                             niqcode[ni->ni_code], ntop_buf);
2427                                 } else {
2428 #if 1
2429                                         /* backward compat to -W */
2430                                         (void)printf(", oldfqdn");
2431 #else
2432                                         (void)printf(", invalid");
2433 #endif
2434                                 }
2435                                 break;
2436                         case ICMP6_NI_SUBJ_FQDN:
2437                                 if (end == (u_char *)(ni + 1)) {
2438                                         (void)printf(", no subject");
2439                                         break;
2440                                 }
2441                                 printf(", subject=%s", niqcode[ni->ni_code]);
2442                                 cp = (const u_char *)(ni + 1);
2443                                 if (dnsdecode(&cp, end, NULL, dnsname,
2444                                     sizeof(dnsname)) != NULL)
2445                                         printf("(%s)", dnsname);
2446                                 else
2447                                         printf("(invalid)");
2448                                 break;
2449                         case ICMP6_NI_SUBJ_IPV4:
2450                                 if (l == sizeof(struct in_addr) &&
2451                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2452                                     sizeof(ntop_buf)) != NULL) {
2453                                         (void)printf(", subject=%s(%s)",
2454                                             niqcode[ni->ni_code], ntop_buf);
2455                                 } else
2456                                         (void)printf(", invalid");
2457                                 break;
2458                         default:
2459                                 (void)printf(", invalid");
2460                                 break;
2461                         }
2462                 }
2463                 break;
2464         case ICMP6_NI_REPLY:
2465                 (void)printf("Node Information Reply");
2466                 /* XXX ID + Seq + Data */
2467                 ni = (struct icmp6_nodeinfo *)icp;
2468                 printf(", ");
2469                 switch (ntohs(ni->ni_qtype)) {
2470                 case NI_QTYPE_NOOP:
2471                         (void)printf("NOOP");
2472                         break;
2473                 case NI_QTYPE_SUPTYPES:
2474                         (void)printf("Supported qtypes");
2475                         break;
2476                 case NI_QTYPE_FQDN:
2477                         (void)printf("DNS name");
2478                         break;
2479                 case NI_QTYPE_NODEADDR:
2480                         (void)printf("nodeaddr");
2481                         break;
2482                 case NI_QTYPE_IPV4ADDR:
2483                         (void)printf("IPv4 nodeaddr");
2484                         break;
2485                 default:
2486                         (void)printf("unknown qtype");
2487                         break;
2488                 }
2489                 if (options & F_VERBOSE) {
2490                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2491                                 printf(", invalid");
2492                         else
2493                                 printf(", %s", nircode[ni->ni_code]);
2494                 }
2495                 break;
2496         default:
2497                 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2498         }
2499 }
2500
2501 /*
2502  * pr_iph --
2503  *      Print an IP6 header.
2504  */
2505 void
2506 pr_iph(struct ip6_hdr *ip6)
2507 {
2508         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2509         u_int8_t tc;
2510         char ntop_buf[INET6_ADDRSTRLEN];
2511
2512         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2513         tc = (tc >> 4) & 0x0f;
2514         tc |= (ip6->ip6_vfc << 4);
2515
2516         printf("Vr TC  Flow Plen Nxt Hlim\n");
2517         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2518             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2519             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2520         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2521                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2522         printf("%s->", ntop_buf);
2523         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2524                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2525         printf("%s\n", ntop_buf);
2526 }
2527
2528 /*
2529  * pr_addr --
2530  *      Return an ascii host address as a dotted quad and optionally with
2531  * a hostname.
2532  */
2533 const char *
2534 pr_addr(struct sockaddr *addr, int addrlen)
2535 {
2536         static char buf[NI_MAXHOST];
2537         int flag = 0;
2538
2539         if ((options & F_HOSTNAME) == 0)
2540                 flag |= NI_NUMERICHOST;
2541
2542         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2543                 return (buf);
2544         else
2545                 return "?";
2546 }
2547
2548 /*
2549  * pr_retip --
2550  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2551  */
2552 void
2553 pr_retip(struct ip6_hdr *ip6, u_char *end)
2554 {
2555         u_char *cp = (u_char *)ip6, nh;
2556         int hlen;
2557
2558         if (end - (u_char *)ip6 < sizeof(*ip6)) {
2559                 printf("IP6");
2560                 goto trunc;
2561         }
2562         pr_iph(ip6);
2563         hlen = sizeof(*ip6);
2564
2565         nh = ip6->ip6_nxt;
2566         cp += hlen;
2567         while (end - cp >= 8) {
2568                 switch (nh) {
2569                 case IPPROTO_HOPOPTS:
2570                         printf("HBH ");
2571                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2572                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2573                         break;
2574                 case IPPROTO_DSTOPTS:
2575                         printf("DSTOPT ");
2576                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2577                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2578                         break;
2579                 case IPPROTO_FRAGMENT:
2580                         printf("FRAG ");
2581                         hlen = sizeof(struct ip6_frag);
2582                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2583                         break;
2584                 case IPPROTO_ROUTING:
2585                         printf("RTHDR ");
2586                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2587                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2588                         break;
2589 #ifdef IPSEC
2590                 case IPPROTO_AH:
2591                         printf("AH ");
2592                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2593                         nh = ((struct ah *)cp)->ah_nxt;
2594                         break;
2595 #endif
2596                 case IPPROTO_ICMPV6:
2597                         printf("ICMP6: type = %d, code = %d\n",
2598                             *cp, *(cp + 1));
2599                         return;
2600                 case IPPROTO_ESP:
2601                         printf("ESP\n");
2602                         return;
2603                 case IPPROTO_TCP:
2604                         printf("TCP: from port %u, to port %u (decimal)\n",
2605                             (*cp * 256 + *(cp + 1)),
2606                             (*(cp + 2) * 256 + *(cp + 3)));
2607                         return;
2608                 case IPPROTO_UDP:
2609                         printf("UDP: from port %u, to port %u (decimal)\n",
2610                             (*cp * 256 + *(cp + 1)),
2611                             (*(cp + 2) * 256 + *(cp + 3)));
2612                         return;
2613                 default:
2614                         printf("Unknown Header(%d)\n", nh);
2615                         return;
2616                 }
2617
2618                 if ((cp += hlen) >= end)
2619                         goto trunc;
2620         }
2621         if (end - cp < 8)
2622                 goto trunc;
2623
2624         putchar('\n');
2625         return;
2626
2627   trunc:
2628         printf("...\n");
2629         return;
2630 }
2631
2632 void
2633 fill(char *bp, char *patp)
2634 {
2635         int ii, jj, kk;
2636         int pat[16];
2637         char *cp;
2638
2639         for (cp = patp; *cp; cp++)
2640                 if (!isxdigit(*cp))
2641                         errx(1, "patterns must be specified as hex digits");
2642         ii = sscanf(patp,
2643             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2644             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2645             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2646             &pat[13], &pat[14], &pat[15]);
2647
2648 /* xxx */
2649         if (ii > 0)
2650                 for (kk = 0;
2651                     kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii);
2652                     kk += ii)
2653                         for (jj = 0; jj < ii; ++jj)
2654                                 bp[jj + kk] = pat[jj];
2655         if (!(options & F_QUIET)) {
2656                 (void)printf("PATTERN: 0x");
2657                 for (jj = 0; jj < ii; ++jj)
2658                         (void)printf("%02x", bp[jj] & 0xFF);
2659                 (void)printf("\n");
2660         }
2661 }
2662
2663 #ifdef IPSEC
2664 #ifdef IPSEC_POLICY_IPSEC
2665 int
2666 setpolicy(int so __unused, char *policy)
2667 {
2668         char *buf;
2669
2670         if (policy == NULL)
2671                 return 0;       /* ignore */
2672
2673         buf = ipsec_set_policy(policy, strlen(policy));
2674         if (buf == NULL)
2675                 errx(1, "%s", ipsec_strerror());
2676         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2677             ipsec_get_policylen(buf)) < 0)
2678                 warnx("Unable to set IPsec policy");
2679         free(buf);
2680
2681         return 0;
2682 }
2683 #endif
2684 #endif
2685
2686 char *
2687 nigroup(char *name, int nig_oldmcprefix)
2688 {
2689         char *p;
2690         char *q;
2691         MD5_CTX ctxt;
2692         u_int8_t digest[16];
2693         u_int8_t c;
2694         size_t l;
2695         char hbuf[NI_MAXHOST];
2696         struct in6_addr in6;
2697         int valid;
2698
2699         p = strchr(name, '.');
2700         if (!p)
2701                 p = name + strlen(name);
2702         l = p - name;
2703         if (l > 63 || l > sizeof(hbuf) - 1)
2704                 return NULL;    /*label too long*/
2705         strncpy(hbuf, name, l);
2706         hbuf[(int)l] = '\0';
2707
2708         for (q = name; *q; q++) {
2709                 if (isupper(*(unsigned char *)q))
2710                         *q = tolower(*(unsigned char *)q);
2711         }
2712
2713         /* generate 16 bytes of pseudo-random value. */
2714         memset(&ctxt, 0, sizeof(ctxt));
2715         MD5Init(&ctxt);
2716         c = l & 0xff;
2717         MD5Update(&ctxt, &c, sizeof(c));
2718         MD5Update(&ctxt, (unsigned char *)name, l);
2719         MD5Final(digest, &ctxt);
2720
2721         if (nig_oldmcprefix) {
2722                 /* draft-ietf-ipngwg-icmp-name-lookup */
2723                 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
2724         } else {
2725                 /* RFC 4620 */
2726                 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
2727         }
2728         if (valid != 1)
2729                 return NULL;    /*XXX*/
2730
2731         if (nig_oldmcprefix) {
2732                 /* draft-ietf-ipngwg-icmp-name-lookup */
2733                 bcopy(digest, &in6.s6_addr[12], 4);
2734         } else {
2735                 /* RFC 4620 */
2736                 bcopy(digest, &in6.s6_addr[13], 3);
2737         }
2738
2739         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2740                 return NULL;
2741
2742         return strdup(hbuf);
2743 }
2744
2745 void
2746 usage(void)
2747 {
2748         (void)fprintf(stderr,
2749 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2750             "A"
2751 #endif
2752             "usage: ping6 [-"
2753             "Dd"
2754 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2755             "E"
2756 #endif
2757             "fH"
2758 #ifdef IPV6_USE_MIN_MTU
2759             "m"
2760 #endif
2761             "nNoqrRtvwW] "
2762             "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2763             "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2764 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2765             " [-P policy]"
2766 #endif
2767             "\n"
2768             "             [-p pattern] [-S sourceaddr] [-s packetsize] "
2769             "[-x waittime]\n"
2770             "             [-X timeout] [hops ...] host\n");
2771         exit(1);
2772 }