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  * @(#) Copyright (c) 1989, 1993 The Regents of the University of California.  All rights reserved.
  32  * @(#)ping.c   8.1 (Berkeley) 6/5/93
  33  * $FreeBSD: src/sbin/ping6/ping6.c,v 1.30 2007/04/19 15:41:00 mtm Exp $
  34  */
  35
  36 /*      BSDI    ping.c,v 2.3 1996/01/21 17:56:50 jch Exp        */
  37
  38 /*
  39  * Copyright (c) 1989, 1993
  40  *      The Regents of the University of California.  All rights reserved.
  41  *
  42  * This code is derived from software contributed to Berkeley by
  43  * Mike Muuss.
  44  *
  45  * Redistribution and use in source and binary forms, with or without
  46  * modification, are permitted provided that the following conditions
  47  * are met:
  48  * 1. Redistributions of source code must retain the above copyright
  49  *    notice, this list of conditions and the following disclaimer.
  50  * 2. Redistributions in binary form must reproduce the above copyright
  51  *    notice, this list of conditions and the following disclaimer in the
  52  *    documentation and/or other materials provided with the distribution.
  53  * 3. Neither the name of the University nor the names of its contributors
  54  *    may be used to endorse or promote products derived from this software
  55  *    without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  58  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  60  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  61  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  62  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  63  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  64  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  65  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 /*
  71  * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
  72  * measure round-trip-delays and packet loss across network paths.
  73  *
  74  * Author -
  75  *      Mike Muuss
  76  *      U. S. Army Ballistic Research Laboratory
  77  *      December, 1983
  78  *
  79  * Status -
  80  *      Public Domain.  Distribution Unlimited.
  81  * Bugs -
  82  *      More statistics could always be gathered.
  83  *      This program has to run SUID to ROOT to access the ICMP socket.
  84  */
  85 /*
  86  * NOTE:
  87  * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
  88  * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
  89  * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
  90  * network attached to 1 or more interfaces)
  91  */
  92
  93 #include <sys/param.h>
  94 #include <sys/uio.h>
  95 #include <sys/socket.h>
  96 #include <sys/time.h>
  97
  98 #include <net/if.h>
  99 #include <net/route.h>
 100
 101 #include <netinet/in.h>
 102 #include <netinet/ip6.h>
 103 #include <netinet/icmp6.h>
 104 #include <arpa/inet.h>
 105 #include <arpa/nameser.h>
 106 #include <netdb.h>
 107
 108 #include <ctype.h>
 109 #include <err.h>
 110 #include <errno.h>
 111 #include <fcntl.h>
 112 #include <math.h>
 113 #include <signal.h>
 114 #include <stdio.h>
 115 #include <stdlib.h>
 116 #include <string.h>
 117 #include <unistd.h>
 118 #ifdef HAVE_POLL_H
 119 #include <poll.h>
 120 #endif
 121
 122 #ifdef IPSEC
 123 #include <netinet6/ah.h>
 124 #include <netinet6/ipsec.h>
 125 #endif
 126
 127 #include <md5.h>
 128
 129 struct tv32 {
 130         u_int32_t tv32_sec;
 131         u_int32_t tv32_usec;
 132 };
 133
 134 #define MAXPACKETLEN    131072
 135 #define IP6LEN          40
 136 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 137 #define ICMP6ECHOTMLEN sizeof(struct tv32)
 138 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 139 #define CONTROLLEN      10240   /* ancillary data buffer size RFC3542 20.1 */
 140 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 141 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 142 #define EXTRA           256     /* for AH and various other headers. weird. */
 143 #define DEFDATALEN      ICMP6ECHOTMLEN
 144 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 145 #define NROUTES         9               /* number of record route slots */
 146
 147 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 148 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 149 #define SET(bit)        (A(bit) |= B(bit))
 150 #define CLR(bit)        (A(bit) &= (~B(bit)))
 151 #define TST(bit)        (A(bit) & B(bit))
 152
 153 #define F_FLOOD         0x0001
 154 #define F_INTERVAL      0x0002
 155 #define F_PINGFILLED    0x0008
 156 #define F_QUIET         0x0010
 157 #define F_RROUTE        0x0020
 158 #define F_SO_DEBUG      0x0040
 159 #define F_VERBOSE       0x0100
 160 #ifdef IPSEC
 161 #ifdef IPSEC_POLICY_IPSEC
 162 #define F_POLICY        0x0400
 163 #else
 164 #define F_AUTHHDR       0x0200
 165 #define F_ENCRYPT       0x0400
 166 #endif /*IPSEC_POLICY_IPSEC*/
 167 #endif /*IPSEC*/
 168 #define F_NODEADDR      0x0800
 169 #define F_FQDN          0x1000
 170 #define F_INTERFACE     0x2000
 171 #define F_SRCADDR       0x4000
 172 #define F_HOSTNAME      0x10000
 173 #define F_FQDNOLD       0x20000
 174 #define F_NIGROUP       0x40000
 175 #define F_SUPTYPES      0x80000
 176 #define F_NOMINMTU      0x100000
 177 #define F_NOUSERDATA    (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
 178 u_int options;
 179
 180 #define IN6LEN          sizeof(struct in6_addr)
 181 #define SA6LEN          sizeof(struct sockaddr_in6)
 182 #define DUMMY_PORT      10101
 183
 184 #define SIN6(s) ((struct sockaddr_in6 *)(s))
 185
 186 /*
 187  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 188  * number of received sequence numbers we can keep track of.  Change 128
 189  * to 8192 for complete accuracy...
 190  */
 191 #define MAX_DUP_CHK     (8 * 8192)
 192 int mx_dup_ck = MAX_DUP_CHK;
 193 char rcvd_tbl[MAX_DUP_CHK / 8];
 194
 195 struct addrinfo *res;
 196 struct sockaddr_in6 dst;        /* who to ping6 */
 197 struct sockaddr_in6 src;        /* src addr of this packet */
 198 socklen_t srclen;
 199 int datalen = DEFDATALEN;
 200 int s;                          /* socket file descriptor */
 201 u_char outpack[MAXPACKETLEN];
 202 char BSPACE = '\b';             /* characters written for flood */
 203 char DOT = '.';
 204 char *hostname;
 205 int ident;                      /* process id to identify our packets */
 206 u_int8_t nonce[8];              /* nonce field for node information */
 207 int hoplimit = -1;              /* hoplimit */
 208 int pathmtu = 0;                /* path MTU for the destination.  0 = unspec. */
 209
 210 /* counters */
 211 long npackets;                  /* max packets to transmit */
 212 long nreceived;                 /* # of packets we got back */
 213 long nrepeats;                  /* number of duplicates */
 214 long ntransmitted;              /* sequence # for outbound packets = #sent */
 215 struct timeval interval = {1, 0}; /* interval between packets */
 216
 217 /* timing */
 218 int timing;                     /* flag to do timing */
 219 double tmin = 999999999.0;      /* minimum round trip time */
 220 double tmax = 0.0;              /* maximum round trip time */
 221 double tsum = 0.0;              /* sum of all times, for doing average */
 222 double tsumsq = 0.0;            /* sum of all times squared, for std. dev. */
 223
 224 /* for node addresses */
 225 u_short naflags;
 226
 227 /* for ancillary data(advanced API) */
 228 struct msghdr smsghdr;
 229 struct iovec smsgiov;
 230 char *scmsg = NULL;
 231
 232 volatile sig_atomic_t seenalrm;
 233 volatile sig_atomic_t seenint;
 234 #ifdef SIGINFO
 235 volatile sig_atomic_t seeninfo;
 236 #endif
 237
 238 int      main(int, char *[]);
 239 void     fill(char *, char *);
 240 int      get_hoplim(struct msghdr *);
 241 #ifdef IPV6_RECVPATHMTU
 242 int      get_pathmtu(struct msghdr *);
 243 #else
 244 #define get_pathmtu(mhdr) (0)
 245 #endif
 246 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
 247 void     onsignal(int);
 248 void     retransmit(void);
 249 void     onint(int);
 250 size_t   pingerlen(void);
 251 int      pinger(void);
 252 const char *pr_addr(struct sockaddr *, int);
 253 void     pr_icmph(struct icmp6_hdr *, u_char *);
 254 void     pr_iph(struct ip6_hdr *);
 255 void     pr_suptypes(struct icmp6_nodeinfo *, size_t);
 256 void     pr_nodeaddr(struct icmp6_nodeinfo *, int);
 257 int      myechoreply(const struct icmp6_hdr *);
 258 int      mynireply(const struct icmp6_nodeinfo *);
 259 char *dnsdecode(const u_char **, const u_char *, const u_char *,
 260         char *, size_t);
 261 void     pr_pack(u_char *, int, struct msghdr *);
 262 void     pr_exthdrs(struct msghdr *);
 263 void     pr_ip6opt(void *, size_t);
 264 void     pr_rthdr(void *, size_t);
 265 int      pr_bitrange(u_int32_t, int, int);
 266 void     pr_retip(struct ip6_hdr *, u_char *);
 267 void     summary(void);
 268 void     tvsub(struct timeval *, struct timeval *);
 269 int      setpolicy(int, char *);
 270 char    *nigroup(char *);
 271 void     usage(void);
 272
 273 int
 274 main(int argc, char **argv)
 275 {
 276         struct itimerval itimer;
 277         struct sockaddr_in6 from;
 278 #ifndef HAVE_ARC4RANDOM
 279         struct timeval seed;
 280 #endif
 281 #ifdef HAVE_POLL_H
 282         int timeout;
 283 #else
 284         struct timeval timeout, *tv;
 285 #endif
 286         struct addrinfo hints;
 287 #ifdef HAVE_POLL_H
 288         struct pollfd fdmaskp[1];
 289 #else
 290         fd_set *fdmaskp;
 291         int fdmasks;
 292 #endif
 293         int cc, i;
 294         int ch, hold, packlen, preload, optval, ret_ga;
 295         u_char *datap, *packet;
 296         char *e, *target, *ifname = NULL, *gateway = NULL;
 297         int ip6optlen = 0;
 298         struct cmsghdr *scmsgp = NULL;
 299         struct cmsghdr *cm;
 300 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 301         u_long lsockbufsize;
 302         int sockbufsize = 0;
 303 #endif
 304         int usepktinfo = 0;
 305         struct in6_pktinfo *pktinfo = NULL;
 306 #ifdef USE_RFC3542
 307         struct ip6_rthdr *rthdr = NULL;
 308 #endif
 309 #ifdef IPSEC_POLICY_IPSEC
 310         char *policy_in = NULL;
 311         char *policy_out = NULL;
 312 #endif
 313 #ifdef IPV6_USE_MIN_MTU
 314         int mflag = 0;
 315 #endif
 316         double intval;
 317
 318         /* just to be sure */
 319         memset(&smsghdr, 0, sizeof(smsghdr));
 320         memset(&smsgiov, 0, sizeof(smsgiov));
 321
 322         preload = 0;
 323         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 324 #ifndef IPSEC
 325 #define ADDOPTS
 326 #else
 327 #ifdef IPSEC_POLICY_IPSEC
 328 #define ADDOPTS "P:"
 329 #else
 330 #define ADDOPTS "AE"
 331 #endif /*IPSEC_POLICY_IPSEC*/
 332 #endif
 333         while ((ch = getopt(argc, argv,
 334             "a:b:c:dfHg:h:I:i:l:mnNp:qS:s:tvwW" ADDOPTS)) != -1) {
 335 #undef ADDOPTS
 336                 switch (ch) {
 337                 case 'a':
 338                 {
 339                         char *cp;
 340
 341                         options &= ~F_NOUSERDATA;
 342                         options |= F_NODEADDR;
 343                         for (cp = optarg; *cp != '\0'; cp++) {
 344                                 switch (*cp) {
 345                                 case 'a':
 346                                         naflags |= NI_NODEADDR_FLAG_ALL;
 347                                         break;
 348                                 case 'c':
 349                                 case 'C':
 350                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 351                                         break;
 352                                 case 'l':
 353                                 case 'L':
 354                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 355                                         break;
 356                                 case 's':
 357                                 case 'S':
 358                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 359                                         break;
 360                                 case 'g':
 361                                 case 'G':
 362                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 363                                         break;
 364                                 case 'A': /* experimental. not in the spec */
 365 #ifdef NI_NODEADDR_FLAG_ANYCAST
 366                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 367                                         break;
 368 #else
 369                                         errx(1,
 370 "-a A is not supported on the platform");
 371                                         /*NOTREACHED*/
 372 #endif
 373                                 default:
 374                                         usage();
 375                                         /*NOTREACHED*/
 376                                 }
 377                         }
 378                         break;
 379                 }
 380                 case 'b':
 381 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 382                         errno = 0;
 383                         e = NULL;
 384                         lsockbufsize = strtoul(optarg, &e, 10);
 385                         sockbufsize = lsockbufsize;
 386                         if (errno || !*optarg || *e ||
 387                             sockbufsize != (long)lsockbufsize)
 388                                 errx(1, "invalid socket buffer size");
 389 #else
 390                         errx(1,
 391 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 392 #endif
 393                         break;
 394                 case 'c':
 395                         npackets = strtol(optarg, &e, 10);
 396                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 397                                 errx(1,
 398                                     "illegal number of packets -- %s", optarg);
 399                         break;
 400                 case 'd':
 401                         options |= F_SO_DEBUG;
 402                         break;
 403                 case 'f':
 404                         if (getuid()) {
 405                                 errno = EPERM;
 406                                 errx(1, "Must be superuser to flood ping");
 407                         }
 408                         options |= F_FLOOD;
 409                         setbuf(stdout, NULL);
 410                         break;
 411                 case 'g':
 412                         gateway = optarg;
 413                         break;
 414                 case 'H':
 415                         options |= F_HOSTNAME;
 416                         break;
 417                 case 'h':               /* hoplimit */
 418                         hoplimit = strtol(optarg, &e, 10);
 419                         if (*optarg == '\0' || *e != '\0')
 420                                 errx(1, "illegal hoplimit %s", optarg);
 421                         if (255 < hoplimit || hoplimit < -1)
 422                                 errx(1,
 423                                     "illegal hoplimit -- %s", optarg);
 424                         break;
 425                 case 'I':
 426                         ifname = optarg;
 427                         options |= F_INTERFACE;
 428 #ifndef USE_SIN6_SCOPE_ID
 429                         usepktinfo++;
 430 #endif
 431                         break;
 432                 case 'i':               /* wait between sending packets */
 433                         intval = strtod(optarg, &e);
 434                         if (*optarg == '\0' || *e != '\0')
 435                                 errx(1, "illegal timing interval %s", optarg);
 436                         if (intval < 1 && getuid()) {
 437                                 errx(1, "%s: only root may use interval < 1s",
 438                                     strerror(EPERM));
 439                         }
 440                         interval.tv_sec = (long)intval;
 441                         interval.tv_usec =
 442                             (long)((intval - interval.tv_sec) * 1000000);
 443                         if (interval.tv_sec < 0)
 444                                 errx(1, "illegal timing interval %s", optarg);
 445                         /* less than 1/hz does not make sense */
 446                         if (interval.tv_sec == 0 && interval.tv_usec < 10000) {
 447                                 warnx("too small interval, raised to 0.01");
 448                                 interval.tv_usec = 10000;
 449                         }
 450                         options |= F_INTERVAL;
 451                         break;
 452                 case 'l':
 453                         if (getuid()) {
 454                                 errno = EPERM;
 455                                 errx(1, "Must be superuser to preload");
 456                         }
 457                         preload = strtol(optarg, &e, 10);
 458                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 459                                 errx(1, "illegal preload value -- %s", optarg);
 460                         break;
 461                 case 'm':
 462 #ifdef IPV6_USE_MIN_MTU
 463                         mflag++;
 464                         break;
 465 #else
 466                         errx(1, "-%c is not supported on this platform", ch);
 467                         /*NOTREACHED*/
 468 #endif
 469                 case 'n':
 470                         options &= ~F_HOSTNAME;
 471                         break;
 472                 case 'N':
 473                         options |= F_NIGROUP;
 474                         break;
 475                 case 'p':               /* fill buffer with user pattern */
 476                         options |= F_PINGFILLED;
 477                         fill((char *)datap, optarg);
 478                                 break;
 479                 case 'q':
 480                         options |= F_QUIET;
 481                         break;
 482                 case 'S':
 483                         memset(&hints, 0, sizeof(struct addrinfo));
 484                         hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
 485                         hints.ai_family = AF_INET6;
 486                         hints.ai_socktype = SOCK_RAW;
 487                         hints.ai_protocol = IPPROTO_ICMPV6;
 488
 489                         ret_ga = getaddrinfo(optarg, NULL, &hints, &res);
 490                         if (ret_ga) {
 491                                 errx(1, "invalid source address: %s",
 492                                      gai_strerror(ret_ga));
 493                         }
 494                         /*
 495                          * res->ai_family must be AF_INET6 and res->ai_addrlen
 496                          * must be sizeof(src).
 497                          */
 498                         memcpy(&src, res->ai_addr, res->ai_addrlen);
 499                         srclen = res->ai_addrlen;
 500                         freeaddrinfo(res);
 501                         options |= F_SRCADDR;
 502                         break;
 503                 case 's':               /* size of packet to send */
 504                         datalen = strtol(optarg, &e, 10);
 505                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 506                                 errx(1, "illegal datalen value -- %s", optarg);
 507                         if (datalen > MAXDATALEN) {
 508                                 errx(1,
 509                                     "datalen value too large, maximum is %d",
 510                                     MAXDATALEN);
 511                         }
 512                         break;
 513                 case 't':
 514                         options &= ~F_NOUSERDATA;
 515                         options |= F_SUPTYPES;
 516                         break;
 517                 case 'v':
 518                         options |= F_VERBOSE;
 519                         break;
 520                 case 'w':
 521                         options &= ~F_NOUSERDATA;
 522                         options |= F_FQDN;
 523                         break;
 524                 case 'W':
 525                         options &= ~F_NOUSERDATA;
 526                         options |= F_FQDNOLD;
 527                         break;
 528 #ifdef IPSEC
 529 #ifdef IPSEC_POLICY_IPSEC
 530                 case 'P':
 531                         options |= F_POLICY;
 532                         if (!strncmp("in", optarg, 2)) {
 533                                 if ((policy_in = strdup(optarg)) == NULL)
 534                                         errx(1, "strdup");
 535                         } else if (!strncmp("out", optarg, 3)) {
 536                                 if ((policy_out = strdup(optarg)) == NULL)
 537                                         errx(1, "strdup");
 538                         } else
 539                                 errx(1, "invalid security policy");
 540                         break;
 541 #else
 542                 case 'A':
 543                         options |= F_AUTHHDR;
 544                         break;
 545                 case 'E':
 546                         options |= F_ENCRYPT;
 547                         break;
 548 #endif /*IPSEC_POLICY_IPSEC*/
 549 #endif /*IPSEC*/
 550                 default:
 551                         usage();
 552                         /*NOTREACHED*/
 553                 }
 554         }
 555
 556         argc -= optind;
 557         argv += optind;
 558
 559         if (argc < 1) {
 560                 usage();
 561                 /*NOTREACHED*/
 562         }
 563         if (argc > 1) {
 564                 errx(1, "too many arguments");
 565                 /*NOTREACHED*/
 566         }
 567
 568         if (options & F_NIGROUP) {
 569                 target = nigroup(argv[argc - 1]);
 570                 if (target == NULL) {
 571                         usage();
 572                         /*NOTREACHED*/
 573                 }
 574         } else
 575                 target = argv[argc - 1];
 576
 577         /* getaddrinfo */
 578         memset(&hints, 0, sizeof(struct addrinfo));
 579         hints.ai_flags = AI_CANONNAME;
 580         hints.ai_family = AF_INET6;
 581         hints.ai_socktype = SOCK_RAW;
 582         hints.ai_protocol = IPPROTO_ICMPV6;
 583
 584         ret_ga = getaddrinfo(target, NULL, &hints, &res);
 585         if (ret_ga)
 586                 errx(1, "%s", gai_strerror(ret_ga));
 587         if (res->ai_canonname)
 588                 hostname = res->ai_canonname;
 589         else
 590                 hostname = target;
 591
 592         if (!res->ai_addr)
 593                 errx(1, "getaddrinfo failed");
 594
 595         memcpy(&dst, res->ai_addr, res->ai_addrlen);
 596
 597         if ((s = socket(res->ai_family, res->ai_socktype,
 598             res->ai_protocol)) < 0)
 599                 err(1, "socket");
 600
 601         /* set the source address if specified. */
 602         if ((options & F_SRCADDR) &&
 603             bind(s, (struct sockaddr *)&src, srclen) != 0) {
 604                 err(1, "bind");
 605         }
 606
 607         /* set the gateway (next hop) if specified */
 608         if (gateway) {
 609                 struct addrinfo ghints, *gres;
 610                 int error;
 611
 612                 memset(&ghints, 0, sizeof(ghints));
 613                 ghints.ai_family = AF_INET6;
 614                 ghints.ai_socktype = SOCK_RAW;
 615                 ghints.ai_protocol = IPPROTO_ICMPV6;
 616
 617                 error = getaddrinfo(gateway, NULL, &hints, &gres);
 618                 if (error) {
 619                         errx(1, "getaddrinfo for the gateway %s: %s",
 620                              gateway, gai_strerror(error));
 621                 }
 622                 if (gres->ai_next && (options & F_VERBOSE))
 623                         warnx("gateway resolves to multiple addresses");
 624
 625                 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
 626                                gres->ai_addr, gres->ai_addrlen)) {
 627                         err(1, "setsockopt(IPV6_NEXTHOP)");
 628                 }
 629
 630                 freeaddrinfo(gres);
 631         }
 632
 633         /*
 634          * let the kerel pass extension headers of incoming packets,
 635          * for privileged socket options
 636          */
 637         if ((options & F_VERBOSE) != 0) {
 638                 int opton = 1;
 639
 640 #ifdef IPV6_RECVHOPOPTS
 641                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 642                     sizeof(opton)))
 643                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 644 #else  /* old adv. API */
 645                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 646                     sizeof(opton)))
 647                         err(1, "setsockopt(IPV6_HOPOPTS)");
 648 #endif
 649 #ifdef IPV6_RECVDSTOPTS
 650                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 651                     sizeof(opton)))
 652                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 653 #else  /* old adv. API */
 654                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 655                     sizeof(opton)))
 656                         err(1, "setsockopt(IPV6_DSTOPTS)");
 657 #endif
 658 #ifdef IPV6_RECVRTHDRDSTOPTS
 659                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 660                     sizeof(opton)))
 661                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 662 #endif
 663         }
 664
 665         /* revoke root privilege */
 666         seteuid(getuid());
 667         setuid(getuid());
 668
 669         if ((options & F_FLOOD) && (options & F_INTERVAL))
 670                 errx(1, "-f and -i incompatible options");
 671
 672         if ((options & F_NOUSERDATA) == 0) {
 673                 if (datalen >= (int)sizeof(struct tv32)) {
 674                         /* we can time transfer */
 675                         timing = 1;
 676                 } else
 677                         timing = 0;
 678                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 679                 if (options & F_VERBOSE)
 680                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 681                 else
 682                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 683         } else {
 684                 /* suppress timing for node information query */
 685                 timing = 0;
 686                 datalen = 2048;
 687                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 688         }
 689
 690         if (!(packet = (u_char *)malloc((u_int)packlen)))
 691                 err(1, "Unable to allocate packet");
 692         if (!(options & F_PINGFILLED))
 693                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 694                         *datap++ = i;
 695
 696         ident = getpid() & 0xFFFF;
 697 #ifndef HAVE_ARC4RANDOM
 698         gettimeofday(&seed, NULL);
 699         srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident));
 700         memset(nonce, 0, sizeof(nonce));
 701         for (i = 0; i < (int)sizeof(nonce); i += sizeof(int))
 702                 *((int *)&nonce[i]) = rand();
 703 #else
 704         memset(nonce, 0, sizeof(nonce));
 705         for (i = 0; i < (int)sizeof(nonce); i += sizeof(u_int32_t))
 706                 *((u_int32_t *)&nonce[i]) = arc4random();
 707 #endif
 708
 709         hold = 1;
 710
 711         if (options & F_SO_DEBUG)
 712                 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 713                     sizeof(hold));
 714         optval = IPV6_DEFHLIM;
 715         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 716                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 717                     &optval, sizeof(optval)) == -1)
 718                         err(1, "IPV6_MULTICAST_HOPS");
 719 #ifdef IPV6_USE_MIN_MTU
 720         if (mflag != 1) {
 721                 optval = mflag > 1 ? 0 : 1;
 722                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 723                     &optval, sizeof(optval)) == -1)
 724                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 725         }
 726 #ifdef IPV6_RECVPATHMTU
 727         else {
 728                 optval = 1;
 729                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 730                     &optval, sizeof(optval)) == -1)
 731                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 732         }
 733 #endif /* IPV6_RECVPATHMTU */
 734 #endif /* IPV6_USE_MIN_MTU */
 735
 736 #ifdef IPSEC
 737 #ifdef IPSEC_POLICY_IPSEC
 738         if (options & F_POLICY) {
 739                 if (setpolicy(s, policy_in) < 0)
 740                         errx(1, "%s", ipsec_strerror());
 741                 if (setpolicy(s, policy_out) < 0)
 742                         errx(1, "%s", ipsec_strerror());
 743         }
 744 #else
 745         if (options & F_AUTHHDR) {
 746                 optval = IPSEC_LEVEL_REQUIRE;
 747 #ifdef IPV6_AUTH_TRANS_LEVEL
 748                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 749                     &optval, sizeof(optval)) == -1)
 750                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 751 #else /* old def */
 752                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 753                     &optval, sizeof(optval)) == -1)
 754                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 755 #endif
 756         }
 757         if (options & F_ENCRYPT) {
 758                 optval = IPSEC_LEVEL_REQUIRE;
 759                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 760                     &optval, sizeof(optval)) == -1)
 761                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 762         }
 763 #endif /*IPSEC_POLICY_IPSEC*/
 764 #endif
 765
 766 #ifdef ICMP6_FILTER
 767     {
 768         struct icmp6_filter filt;
 769         if (!(options & F_VERBOSE)) {
 770                 ICMP6_FILTER_SETBLOCKALL(&filt);
 771                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 772                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 773                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 774                 else
 775                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 776         } else {
 777                 ICMP6_FILTER_SETPASSALL(&filt);
 778         }
 779         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 780             sizeof(filt)) < 0)
 781                 err(1, "setsockopt(ICMP6_FILTER)");
 782     }
 783 #endif /*ICMP6_FILTER*/
 784
 785         /* let the kerel pass extension headers of incoming packets */
 786         if ((options & F_VERBOSE) != 0) {
 787                 int opton = 1;
 788
 789 #ifdef IPV6_RECVRTHDR
 790                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 791                     sizeof(opton)))
 792                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 793 #else  /* old adv. API */
 794                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 795                     sizeof(opton)))
 796                         err(1, "setsockopt(IPV6_RTHDR)");
 797 #endif
 798         }
 799
 800 /*
 801         optval = 1;
 802         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 803                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 804                     &optval, sizeof(optval)) == -1)
 805                         err(1, "IPV6_MULTICAST_LOOP");
 806 */
 807
 808         /* Specify the outgoing interface and/or the source address */
 809         if (usepktinfo)
 810                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 811
 812         if (hoplimit != -1)
 813                 ip6optlen += CMSG_SPACE(sizeof(int));
 814
 815         /* set IP6 packet options */
 816         if (ip6optlen) {
 817                 if ((scmsg = (char *)malloc(ip6optlen)) == NULL)
 818                         errx(1, "can't allocate enough memory");
 819                 smsghdr.msg_control = (caddr_t)scmsg;
 820                 smsghdr.msg_controllen = ip6optlen;
 821                 scmsgp = (struct cmsghdr *)scmsg;
 822         }
 823         if (usepktinfo) {
 824                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 825                 memset(pktinfo, 0, sizeof(*pktinfo));
 826                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 827                 scmsgp->cmsg_level = IPPROTO_IPV6;
 828                 scmsgp->cmsg_type = IPV6_PKTINFO;
 829                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 830         }
 831
 832         /* set the outgoing interface */
 833         if (ifname) {
 834 #ifndef USE_SIN6_SCOPE_ID
 835                 /* pktinfo must have already been allocated */
 836                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 837                         errx(1, "%s: invalid interface name", ifname);
 838 #else
 839                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 840                         errx(1, "%s: invalid interface name", ifname);
 841 #endif
 842         }
 843         if (hoplimit != -1) {
 844                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 845                 scmsgp->cmsg_level = IPPROTO_IPV6;
 846                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 847                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 848
 849                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 850         }
 851
 852         if (!(options & F_SRCADDR)) {
 853                 /*
 854                  * get the source address. XXX since we revoked the root
 855                  * privilege, we cannot use a raw socket for this.
 856                  */
 857                 int dummy;
 858                 socklen_t len = sizeof(src);
 859
 860                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 861                         err(1, "UDP socket");
 862
 863                 src.sin6_family = AF_INET6;
 864                 src.sin6_addr = dst.sin6_addr;
 865                 src.sin6_port = ntohs(DUMMY_PORT);
 866                 src.sin6_scope_id = dst.sin6_scope_id;
 867
 868 #ifdef USE_RFC3542
 869                 if (pktinfo &&
 870                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 871                     (void *)pktinfo, sizeof(*pktinfo)))
 872                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 873                 if (hoplimit != -1 &&
 874                     setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 875                     (void *)&hoplimit, sizeof(hoplimit)))
 876                         err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
 877                 if (hoplimit != -1 &&
 878                     setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 879                     (void *)&hoplimit, sizeof(hoplimit)))
 880                         err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
 881                 if (rthdr &&
 882                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
 883                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
 884                         err(1, "UDP setsockopt(IPV6_RTHDR)");
 885 #else  /* old advanced API */
 886                 if (smsghdr.msg_control &&
 887                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
 888                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
 889                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
 890 #endif
 891
 892                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
 893                         err(1, "UDP connect");
 894
 895                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
 896                         err(1, "getsockname");
 897
 898                 close(dummy);
 899         }
 900
 901 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 902         if (sockbufsize) {
 903                 if (datalen > sockbufsize)
 904                         warnx("you need -b to increase socket buffer size");
 905                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
 906                     sizeof(sockbufsize)) < 0)
 907                         err(1, "setsockopt(SO_SNDBUF)");
 908                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
 909                     sizeof(sockbufsize)) < 0)
 910                         err(1, "setsockopt(SO_RCVBUF)");
 911         }
 912         else {
 913                 if (datalen > 8 * 1024) /*XXX*/
 914                         warnx("you need -b to increase socket buffer size");
 915                 /*
 916                  * When pinging the broadcast address, you can get a lot of
 917                  * answers. Doing something so evil is useful if you are trying
 918                  * to stress the ethernet, or just want to fill the arp cache
 919                  * to get some stuff for /etc/ethers.
 920                  */
 921                 hold = 48 * 1024;
 922                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
 923                     sizeof(hold));
 924         }
 925 #endif
 926
 927         optval = 1;
 928 #ifndef USE_SIN6_SCOPE_ID
 929 #ifdef IPV6_RECVPKTINFO
 930         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
 931             sizeof(optval)) < 0)
 932                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
 933 #else  /* old adv. API */
 934         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
 935             sizeof(optval)) < 0)
 936                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
 937 #endif
 938 #endif /* USE_SIN6_SCOPE_ID */
 939 #ifdef IPV6_RECVHOPLIMIT
 940         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
 941             sizeof(optval)) < 0)
 942                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
 943 #else  /* old adv. API */
 944         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
 945             sizeof(optval)) < 0)
 946                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
 947 #endif
 948
 949         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
 950             (unsigned long)(pingerlen() - 8));
 951         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
 952         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
 953
 954         while (preload--)               /* Fire off them quickies. */
 955                 pinger();
 956
 957         signal(SIGINT, onsignal);
 958 #ifdef SIGINFO
 959         signal(SIGINFO, onsignal);
 960 #endif
 961
 962         if ((options & F_FLOOD) == 0) {
 963                 signal(SIGALRM, onsignal);
 964                 itimer.it_interval = interval;
 965                 itimer.it_value = interval;
 966                 setitimer(ITIMER_REAL, &itimer, NULL);
 967                 if (ntransmitted == 0)
 968                         retransmit();
 969         }
 970
 971 #ifndef HAVE_POLL_H
 972         fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
 973         if ((fdmaskp = malloc(fdmasks)) == NULL)
 974                 err(1, "malloc");
 975 #endif
 976
 977         seenalrm = seenint = 0;
 978 #ifdef SIGINFO
 979         seeninfo = 0;
 980 #endif
 981
 982         /* For control (ancillary) data received from recvmsg() */
 983         cm = (struct cmsghdr *)malloc(CONTROLLEN);
 984         if (cm == NULL)
 985                 err(1, "malloc");
 986
 987         for (;;) {
 988                 struct msghdr m;
 989                 struct iovec iov[2];
 990
 991                 /* signal handling */
 992                 if (seenalrm) {
 993                         retransmit();
 994                         seenalrm = 0;
 995                         continue;
 996                 }
 997                 if (seenint) {
 998                         onint(SIGINT);
 999                         seenint = 0;
1000                         continue;
1001                 }
1002 #ifdef SIGINFO
1003                 if (seeninfo) {
1004                         summary();
1005                         seeninfo = 0;
1006                         continue;
1007                 }
1008 #endif
1009
1010                 if (options & F_FLOOD) {
1011                         pinger();
1012 #ifdef HAVE_POLL_H
1013                         timeout = 10;
1014 #else
1015                         timeout.tv_sec = 0;
1016                         timeout.tv_usec = 10000;
1017                         tv = &timeout;
1018 #endif
1019                 } else {
1020 #ifdef HAVE_POLL_H
1021                         timeout = INFTIM;
1022 #else
1023                         tv = NULL;
1024 #endif
1025                 }
1026 #ifdef HAVE_POLL_H
1027                 fdmaskp[0].fd = s;
1028                 fdmaskp[0].events = POLLIN;
1029                 cc = poll(fdmaskp, 1, timeout);
1030 #else
1031                 memset(fdmaskp, 0, fdmasks);
1032                 FD_SET(s, fdmaskp);
1033                 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1034 #endif
1035                 if (cc < 0) {
1036                         if (errno != EINTR) {
1037 #ifdef HAVE_POLL_H
1038                                 warn("poll");
1039 #else
1040                                 warn("select");
1041 #endif
1042                                 sleep(1);
1043                         }
1044                         continue;
1045                 } else if (cc == 0)
1046                         continue;
1047
1048                 m.msg_name = (caddr_t)&from;
1049                 m.msg_namelen = sizeof(from);
1050                 memset(&iov, 0, sizeof(iov));
1051                 iov[0].iov_base = (caddr_t)packet;
1052                 iov[0].iov_len = packlen;
1053                 m.msg_iov = iov;
1054                 m.msg_iovlen = 1;
1055                 memset(cm, 0, CONTROLLEN);
1056                 m.msg_control = (void *)cm;
1057                 m.msg_controllen = CONTROLLEN;
1058
1059                 cc = recvmsg(s, &m, 0);
1060                 if (cc < 0) {
1061                         if (errno != EINTR) {
1062                                 warn("recvmsg");
1063                                 sleep(1);
1064                         }
1065                         continue;
1066                 } else if (cc == 0) {
1067                         int mtu;
1068
1069                         /*
1070                          * receive control messages only. Process the
1071                          * exceptions (currently the only possiblity is
1072                          * a path MTU notification.)
1073                          */
1074                         if ((mtu = get_pathmtu(&m)) > 0) {
1075                                 if ((options & F_VERBOSE) != 0) {
1076                                         printf("new path MTU (%d) is "
1077                                             "notified\n", mtu);
1078                                 }
1079                         }
1080                         continue;
1081                 } else {
1082                         /*
1083                          * an ICMPv6 message (probably an echoreply) arrived.
1084                          */
1085                         pr_pack(packet, cc, &m);
1086                 }
1087                 if (npackets && nreceived >= npackets)
1088                         break;
1089         }
1090         summary();
1091         exit(nreceived == 0);
1092 }
1093
1094 void
1095 onsignal(int sig)
1096 {
1097         switch (sig) {
1098         case SIGALRM:
1099                 seenalrm++;
1100                 break;
1101         case SIGINT:
1102                 seenint++;
1103                 break;
1104 #ifdef SIGINFO
1105         case SIGINFO:
1106                 seeninfo++;
1107                 break;
1108 #endif
1109         }
1110 }
1111
1112 /*
1113  * retransmit --
1114  *      This routine transmits another ping6.
1115  */
1116 void
1117 retransmit(void)
1118 {
1119         struct itimerval itimer;
1120
1121         if (pinger() == 0)
1122                 return;
1123
1124         /*
1125          * If we're not transmitting any more packets, change the timer
1126          * to wait two round-trip times if we've received any packets or
1127          * ten seconds if we haven't.
1128          */
1129 #define MAXWAIT         10
1130         if (nreceived) {
1131                 itimer.it_value.tv_sec =  2 * tmax / 1000;
1132                 if (itimer.it_value.tv_sec == 0)
1133                         itimer.it_value.tv_sec = 1;
1134         } else
1135                 itimer.it_value.tv_sec = MAXWAIT;
1136         itimer.it_interval.tv_sec = 0;
1137         itimer.it_interval.tv_usec = 0;
1138         itimer.it_value.tv_usec = 0;
1139
1140         signal(SIGALRM, onint);
1141         setitimer(ITIMER_REAL, &itimer, NULL);
1142 }
1143
1144 /*
1145  * pinger --
1146  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1147  * will be added on by the kernel.  The ID field is our UNIX process ID,
1148  * and the sequence number is an ascending integer.  The first 8 bytes
1149  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1150  * byte-order, to compute the round-trip time.
1151  */
1152 size_t
1153 pingerlen(void)
1154 {
1155         size_t l;
1156
1157         if (options & F_FQDN)
1158                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1159         else if (options & F_FQDNOLD)
1160                 l = ICMP6_NIQLEN;
1161         else if (options & F_NODEADDR)
1162                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1163         else if (options & F_SUPTYPES)
1164                 l = ICMP6_NIQLEN;
1165         else
1166                 l = ICMP6ECHOLEN + datalen;
1167
1168         return l;
1169 }
1170
1171 int
1172 pinger(void)
1173 {
1174         struct icmp6_hdr *icp;
1175         struct iovec iov[2];
1176         int i, cc;
1177         struct icmp6_nodeinfo *nip;
1178         int seq;
1179
1180         if (npackets && ntransmitted >= npackets)
1181                 return(-1);     /* no more transmission */
1182
1183         icp = (struct icmp6_hdr *)outpack;
1184         nip = (struct icmp6_nodeinfo *)outpack;
1185         memset(icp, 0, sizeof(*icp));
1186         icp->icmp6_cksum = 0;
1187         seq = ntransmitted++;
1188         CLR(seq % mx_dup_ck);
1189
1190         if (options & F_FQDN) {
1191                 icp->icmp6_type = ICMP6_NI_QUERY;
1192                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1193                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1194                 nip->ni_flags = htons(0);
1195
1196                 memcpy(nip->icmp6_ni_nonce, nonce,
1197                     sizeof(nip->icmp6_ni_nonce));
1198                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1199
1200                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1201                     sizeof(dst.sin6_addr));
1202                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1203                 datalen = 0;
1204         } else if (options & F_FQDNOLD) {
1205                 /* packet format in 03 draft - no Subject data on queries */
1206                 icp->icmp6_type = ICMP6_NI_QUERY;
1207                 icp->icmp6_code = 0;    /* code field is always 0 */
1208                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1209                 nip->ni_flags = htons(0);
1210
1211                 memcpy(nip->icmp6_ni_nonce, nonce,
1212                     sizeof(nip->icmp6_ni_nonce));
1213                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1214
1215                 cc = ICMP6_NIQLEN;
1216                 datalen = 0;
1217         } else if (options & F_NODEADDR) {
1218                 icp->icmp6_type = ICMP6_NI_QUERY;
1219                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1220                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1221                 nip->ni_flags = naflags;
1222
1223                 memcpy(nip->icmp6_ni_nonce, nonce,
1224                     sizeof(nip->icmp6_ni_nonce));
1225                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1226
1227                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1228                     sizeof(dst.sin6_addr));
1229                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1230                 datalen = 0;
1231         } else if (options & F_SUPTYPES) {
1232                 icp->icmp6_type = ICMP6_NI_QUERY;
1233                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1234                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1235                 /* we support compressed bitmap */
1236                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1237
1238                 memcpy(nip->icmp6_ni_nonce, nonce,
1239                     sizeof(nip->icmp6_ni_nonce));
1240                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1241                 cc = ICMP6_NIQLEN;
1242                 datalen = 0;
1243         } else {
1244                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1245                 icp->icmp6_code = 0;
1246                 icp->icmp6_id = htons(ident);
1247                 icp->icmp6_seq = ntohs(seq);
1248                 if (timing) {
1249                         struct timeval tv;
1250                         struct tv32 *tv32;
1251                         gettimeofday(&tv, NULL);
1252                         tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1253                         tv32->tv32_sec = htonl(tv.tv_sec);
1254                         tv32->tv32_usec = htonl(tv.tv_usec);
1255                 }
1256                 cc = ICMP6ECHOLEN + datalen;
1257         }
1258
1259 #ifdef DIAGNOSTIC
1260         if (pingerlen() != cc)
1261                 errx(1, "internal error; length mismatch");
1262 #endif
1263
1264         smsghdr.msg_name = (caddr_t)&dst;
1265         smsghdr.msg_namelen = sizeof(dst);
1266         memset(&iov, 0, sizeof(iov));
1267         iov[0].iov_base = (caddr_t)outpack;
1268         iov[0].iov_len = cc;
1269         smsghdr.msg_iov = iov;
1270         smsghdr.msg_iovlen = 1;
1271
1272         i = sendmsg(s, &smsghdr, 0);
1273
1274         if (i < 0 || i != cc)  {
1275                 if (i < 0)
1276                         warn("sendmsg");
1277                 printf("ping6: wrote %s %d chars, ret=%d\n", hostname, cc, i);
1278         }
1279         if (!(options & F_QUIET) && options & F_FLOOD)
1280                 write(STDOUT_FILENO, &DOT, 1);
1281
1282         return(0);
1283 }
1284
1285 int
1286 myechoreply(const struct icmp6_hdr *icp)
1287 {
1288         if (ntohs(icp->icmp6_id) == ident)
1289                 return 1;
1290         else
1291                 return 0;
1292 }
1293
1294 int
1295 mynireply(const struct icmp6_nodeinfo *nip)
1296 {
1297         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1298             nonce + sizeof(u_int16_t),
1299             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1300                 return 1;
1301         else
1302                 return 0;
1303 }
1304
1305 char *
1306 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1307           size_t bufsiz)
1308 {
1309         int i = 0;
1310         const u_char *cp;
1311         char cresult[MAXDNAME + 1];
1312         const u_char *comp;
1313         int l;
1314
1315         cp = *sp;
1316         *buf = '\0';
1317
1318         if (cp >= ep)
1319                 return NULL;
1320         while (cp < ep) {
1321                 i = *cp;
1322                 if (i == 0 || cp != *sp) {
1323                         if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1324                                 return NULL;    /*result overrun*/
1325                 }
1326                 if (i == 0)
1327                         break;
1328                 cp++;
1329
1330                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1331                         /* DNS compression */
1332                         if (!base)
1333                                 return NULL;
1334
1335                         comp = base + (i & 0x3f);
1336                         if (dnsdecode(&comp, cp, base, cresult,
1337                             sizeof(cresult)) == NULL)
1338                                 return NULL;
1339                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1340                                 return NULL;    /*result overrun*/
1341                         break;
1342                 } else if ((i & 0x3f) == i) {
1343                         if (i > ep - cp)
1344                                 return NULL;    /*source overrun*/
1345                         while (i-- > 0 && cp < ep) {
1346                                 l = snprintf(cresult, sizeof(cresult),
1347                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1348                                 if (l >= (int)sizeof(cresult) || l < 0)
1349                                         return NULL;
1350                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1351                                         return NULL;    /*result overrun*/
1352                                 cp++;
1353                         }
1354                 } else
1355                         return NULL;    /*invalid label*/
1356         }
1357         if (i != 0)
1358                 return NULL;    /*not terminated*/
1359         cp++;
1360         *sp = cp;
1361         return buf;
1362 }
1363
1364 /*
1365  * pr_pack --
1366  *      Print out the packet, if it came from us.  This logic is necessary
1367  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1368  * which arrive ('tis only fair).  This permits multiple copies of this
1369  * program to be run without having intermingled output (or statistics!).
1370  */
1371 void
1372 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1373 {
1374 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1375         struct icmp6_hdr *icp;
1376         struct icmp6_nodeinfo *ni;
1377         int i;
1378         int hoplim;
1379         struct sockaddr *from;
1380         int fromlen;
1381         u_char *cp = NULL, *dp, *end = buf + cc;
1382         struct in6_pktinfo *pktinfo = NULL;
1383         struct timeval tv, tp;
1384         struct tv32 *tpp;
1385         double triptime = 0;
1386         int dupflag;
1387         size_t off;
1388         int oldfqdn;
1389         u_int16_t seq;
1390         char dnsname[MAXDNAME + 1];
1391
1392         gettimeofday(&tv, NULL);
1393
1394         if (!mhdr || !mhdr->msg_name ||
1395             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1396             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1397                 if (options & F_VERBOSE)
1398                         warnx("invalid peername");
1399                 return;
1400         }
1401         from = (struct sockaddr *)mhdr->msg_name;
1402         fromlen = mhdr->msg_namelen;
1403         if (cc < (int)sizeof(struct icmp6_hdr)) {
1404                 if (options & F_VERBOSE)
1405                         warnx("packet too short (%d bytes) from %s", cc,
1406                             pr_addr(from, fromlen));
1407                 return;
1408         }
1409         if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1410             (options & F_VERBOSE) != 0)
1411                 warnx("some control data discarded, insufficient buffer size");
1412         icp = (struct icmp6_hdr *)buf;
1413         ni = (struct icmp6_nodeinfo *)buf;
1414         off = 0;
1415
1416         if ((hoplim = get_hoplim(mhdr)) == -1) {
1417                 warnx("failed to get receiving hop limit");
1418                 return;
1419         }
1420         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1421                 warnx("failed to get receiving packet information");
1422                 return;
1423         }
1424
1425         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1426                 seq = ntohs(icp->icmp6_seq);
1427                 ++nreceived;
1428                 if (timing) {
1429                         tpp = (struct tv32 *)(icp + 1);
1430                         tp.tv_sec = ntohl(tpp->tv32_sec);
1431                         tp.tv_usec = ntohl(tpp->tv32_usec);
1432                         tvsub(&tv, &tp);
1433                         triptime = ((double)tv.tv_sec) * 1000.0 +
1434                             ((double)tv.tv_usec) / 1000.0;
1435                         tsum += triptime;
1436                         tsumsq += triptime * triptime;
1437                         if (triptime < tmin)
1438                                 tmin = triptime;
1439                         if (triptime > tmax)
1440                                 tmax = triptime;
1441                 }
1442
1443                 if (TST(seq % mx_dup_ck)) {
1444                         ++nrepeats;
1445                         --nreceived;
1446                         dupflag = 1;
1447                 } else {
1448                         SET(seq % mx_dup_ck);
1449                         dupflag = 0;
1450                 }
1451
1452                 if (options & F_QUIET)
1453                         return;
1454
1455                 if (options & F_FLOOD)
1456                         write(STDOUT_FILENO, &BSPACE, 1);
1457                 else {
1458                         printf("%d bytes from %s, icmp_seq=%u", cc,
1459                             pr_addr(from, fromlen), seq);
1460                         printf(" hlim=%d", hoplim);
1461                         if ((options & F_VERBOSE) != 0) {
1462                                 struct sockaddr_in6 dstsa;
1463
1464                                 memset(&dstsa, 0, sizeof(dstsa));
1465                                 dstsa.sin6_family = AF_INET6;
1466                                 dstsa.sin6_len = sizeof(dstsa);
1467                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1468                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1469                                 printf(" dst=%s",
1470                                     pr_addr((struct sockaddr *)&dstsa,
1471                                     sizeof(dstsa)));
1472                         }
1473                         if (timing)
1474                                 printf(" time=%.3f ms", triptime);
1475                         if (dupflag)
1476                                 printf("(DUP!)");
1477                         /* check the data */
1478                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1479                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1480                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1481                                 if (*cp != *dp) {
1482                                         printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1483                                         break;
1484                                 }
1485                         }
1486                 }
1487         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1488                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1489                 ++nreceived;
1490                 if (TST(seq % mx_dup_ck)) {
1491                         ++nrepeats;
1492                         --nreceived;
1493                         dupflag = 1;
1494                 } else {
1495                         SET(seq % mx_dup_ck);
1496                         dupflag = 0;
1497                 }
1498
1499                 if (options & F_QUIET)
1500                         return;
1501
1502                 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1503
1504                 switch (ntohs(ni->ni_code)) {
1505                 case ICMP6_NI_SUCCESS:
1506                         break;
1507                 case ICMP6_NI_REFUSED:
1508                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1509                         goto fqdnend;
1510                 case ICMP6_NI_UNKNOWN:
1511                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1512                         goto fqdnend;
1513                 default:
1514                         printf("unknown code 0x%x, type 0x%x",
1515                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1516                         goto fqdnend;
1517                 }
1518
1519                 switch (ntohs(ni->ni_qtype)) {
1520                 case NI_QTYPE_NOOP:
1521                         printf("NodeInfo NOOP");
1522                         break;
1523                 case NI_QTYPE_SUPTYPES:
1524                         pr_suptypes(ni, end - (u_char *)ni);
1525                         break;
1526                 case NI_QTYPE_NODEADDR:
1527                         pr_nodeaddr(ni, end - (u_char *)ni);
1528                         break;
1529                 case NI_QTYPE_FQDN:
1530                 default:        /* XXX: for backward compatibility */
1531                         cp = (u_char *)ni + ICMP6_NIRLEN;
1532                         if (buf[off + ICMP6_NIRLEN] ==
1533                             cc - off - ICMP6_NIRLEN - 1)
1534                                 oldfqdn = 1;
1535                         else
1536                                 oldfqdn = 0;
1537                         if (oldfqdn) {
1538                                 cp++;   /* skip length */
1539                                 while (cp < end) {
1540                                         safeputc(*cp & 0xff);
1541                                         cp++;
1542                                 }
1543                         } else {
1544                                 i = 0;
1545                                 while (cp < end) {
1546                                         if (dnsdecode((const u_char **)&cp, end,
1547                                             (const u_char *)(ni + 1), dnsname,
1548                                             sizeof(dnsname)) == NULL) {
1549                                                 printf("???");
1550                                                 break;
1551                                         }
1552                                         /*
1553                                          * name-lookup special handling for
1554                                          * truncated name
1555                                          */
1556                                         if (cp + 1 <= end && !*cp &&
1557                                             strlen(dnsname) > 0) {
1558                                                 dnsname[strlen(dnsname) - 1] = '\0';
1559                                                 cp++;
1560                                         }
1561                                         printf("%s%s", i > 0 ? "," : "",
1562                                             dnsname);
1563                                 }
1564                         }
1565                         if (options & F_VERBOSE) {
1566                                 int32_t ttl;
1567                                 int comma = 0;
1568
1569                                 printf(" (");   /*)*/
1570
1571                                 switch (ni->ni_code) {
1572                                 case ICMP6_NI_REFUSED:
1573                                         printf("refused");
1574                                         comma++;
1575                                         break;
1576                                 case ICMP6_NI_UNKNOWN:
1577                                         printf("unknown qtype");
1578                                         comma++;
1579                                         break;
1580                                 }
1581
1582                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1583                                         /* case of refusion, unknown */
1584                                         /*(*/
1585                                         putchar(')');
1586                                         goto fqdnend;
1587                                 }
1588                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1589                                 if (comma)
1590                                         printf(",");
1591                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1592                                         printf("TTL=%d:meaningless",
1593                                             (int)ttl);
1594                                 } else {
1595                                         if (ttl < 0) {
1596                                                 printf("TTL=%d:invalid", ttl);
1597                                         } else
1598                                                 printf("TTL=%d", ttl);
1599                                 }
1600                                 comma++;
1601
1602                                 if (oldfqdn) {
1603                                         if (comma)
1604                                                 printf(",");
1605                                         printf("03 draft");
1606                                         comma++;
1607                                 } else {
1608                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1609                                         if (cp == end) {
1610                                                 if (comma)
1611                                                         printf(",");
1612                                                 printf("no name");
1613                                                 comma++;
1614                                         }
1615                                 }
1616
1617                                 if (buf[off + ICMP6_NIRLEN] !=
1618                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1619                                         if (comma)
1620                                                 printf(",");
1621                                         printf("invalid namelen:%d/%lu",
1622                                             buf[off + ICMP6_NIRLEN],
1623                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1624                                         comma++;
1625                                 }
1626                                 /*(*/
1627                                 putchar(')');
1628                         }
1629                 fqdnend:
1630                         ;
1631                 }
1632         } else {
1633                 /* We've got something other than an ECHOREPLY */
1634                 if (!(options & F_VERBOSE))
1635                         return;
1636                 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1637                 pr_icmph(icp, end);
1638         }
1639
1640         if (!(options & F_FLOOD)) {
1641                 putchar('\n');
1642                 if (options & F_VERBOSE)
1643                         pr_exthdrs(mhdr);
1644                 fflush(stdout);
1645         }
1646 #undef safeputc
1647 }
1648
1649 void
1650 pr_exthdrs(struct msghdr *mhdr)
1651 {
1652         ssize_t bufsize;
1653         void    *bufp;
1654         struct cmsghdr *cm;
1655
1656         bufsize = 0;
1657         bufp = mhdr->msg_control;
1658         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1659              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1660                 if (cm->cmsg_level != IPPROTO_IPV6)
1661                         continue;
1662
1663                 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1664                 if (bufsize <= 0)
1665                         continue;
1666                 switch (cm->cmsg_type) {
1667                 case IPV6_HOPOPTS:
1668                         printf("  HbH Options: ");
1669                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1670                         break;
1671                 case IPV6_DSTOPTS:
1672 #ifdef IPV6_RTHDRDSTOPTS
1673                 case IPV6_RTHDRDSTOPTS:
1674 #endif
1675                         printf("  Dst Options: ");
1676                         pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1677                         break;
1678                 case IPV6_RTHDR:
1679                         printf("  Routing: ");
1680                         pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1681                         break;
1682                 }
1683         }
1684 }
1685
1686 #ifdef USE_RFC3542
1687 void
1688 pr_ip6opt(void *extbuf, size_t bufsize)
1689 {
1690         struct ip6_hbh *ext;
1691         int currentlen;
1692         u_int8_t type;
1693         socklen_t extlen, len;
1694         void *databuf;
1695         size_t offset;
1696         u_int16_t value2;
1697         u_int32_t value4;
1698
1699         ext = (struct ip6_hbh *)extbuf;
1700         extlen = (ext->ip6h_len + 1) * 8;
1701         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1702             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1703
1704         /*
1705          * Bounds checking on the ancillary data buffer:
1706          *     subtract the size of a cmsg structure from the buffer size.
1707          */
1708         if (bufsize < (extlen  + CMSG_SPACE(0))) {
1709                 extlen = bufsize - CMSG_SPACE(0);
1710                 warnx("options truncated, showing only %u (total=%u)",
1711                     (unsigned int)(extlen / 8 - 1),
1712                     (unsigned int)(ext->ip6h_len));
1713         }
1714
1715         currentlen = 0;
1716         while (1) {
1717                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1718                     &type, &len, &databuf);
1719                 if (currentlen == -1)
1720                         break;
1721                 switch (type) {
1722                 /*
1723                  * Note that inet6_opt_next automatically skips any padding
1724                  * optins.
1725                  */
1726                 case IP6OPT_JUMBO:
1727                         offset = 0;
1728                         offset = inet6_opt_get_val(databuf, offset,
1729                             &value4, sizeof(value4));
1730                         printf("    Jumbo Payload Opt: Length %u\n",
1731                             (u_int32_t)ntohl(value4));
1732                         break;
1733                 /* FIXME: RFC3542 option is IP6OPT_ROUTER_ALERT. */
1734                 case IP6OPT_RTALERT:
1735                         offset = 0;
1736                         offset = inet6_opt_get_val(databuf, offset,
1737                                                    &value2, sizeof(value2));
1738                         printf("    Router Alert Opt: Type %u\n",
1739                             ntohs(value2));
1740                         break;
1741                 default:
1742                         printf("    Received Opt %u len %lu\n",
1743                             type, (unsigned long)len);
1744                         break;
1745                 }
1746         }
1747         return;
1748 }
1749 #else  /* !USE_RFC3542 */
1750 /* ARGSUSED */
1751 void
1752 pr_ip6opt(void *extbuf __unused, size_t bufsize __unused)
1753 {
1754         putchar('\n');
1755         return;
1756 }
1757 #endif /* USE_RFC3542 */
1758
1759 #ifdef USE_RFC3542
1760 void
1761 pr_rthdr(void *extbuf, size_t bufsize __unused)
1762 {
1763         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1764
1765         /* print fixed part of the header */
1766         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1767             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1768         printf("segments unknown, ");
1769         printf("%d left\n", rh->ip6r_segleft);
1770         return;
1771
1772 }
1773
1774 #else  /* !USE_RFC3542 */
1775 /* ARGSUSED */
1776 void
1777 pr_rthdr(void *extbuf __unused)
1778 {
1779         putchar('\n');
1780         return;
1781 }
1782 #endif /* USE_RFC3542 */
1783
1784 int
1785 pr_bitrange(u_int32_t v, int soff, int ii)
1786 {
1787         int off;
1788         int i;
1789
1790         off = 0;
1791         while (off < 32) {
1792                 /* shift till we have 0x01 */
1793                 if ((v & 0x01) == 0) {
1794                         if (ii > 1)
1795                                 printf("-%u", soff + off - 1);
1796                         ii = 0;
1797                         switch (v & 0x0f) {
1798                         case 0x00:
1799                                 v >>= 4;
1800                                 off += 4;
1801                                 continue;
1802                         case 0x08:
1803                                 v >>= 3;
1804                                 off += 3;
1805                                 continue;
1806                         case 0x04: case 0x0c:
1807                                 v >>= 2;
1808                                 off += 2;
1809                                 continue;
1810                         default:
1811                                 v >>= 1;
1812                                 off += 1;
1813                                 continue;
1814                         }
1815                 }
1816
1817                 /* we have 0x01 with us */
1818                 for (i = 0; i < 32 - off; i++) {
1819                         if ((v & (0x01 << i)) == 0)
1820                                 break;
1821                 }
1822                 if (!ii)
1823                         printf(" %u", soff + off);
1824                 ii += i;
1825                 v >>= i; off += i;
1826         }
1827         return ii;
1828 }
1829
1830 /* struct icmp6_nodeinfo *ni:   ni->qtype must be SUPTYPES */
1831 void
1832 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1833 {
1834         size_t clen;
1835         u_int32_t v;
1836         const u_char *cp, *end;
1837         u_int16_t cur;
1838         struct cbit {
1839                 u_int16_t words;        /*32bit count*/
1840                 u_int16_t skip;
1841         } cbit;
1842 #define MAXQTYPES       (1 << 16)
1843         size_t off;
1844         int b;
1845
1846         cp = (u_char *)(ni + 1);
1847         end = ((u_char *)ni) + nilen;
1848         cur = 0;
1849         b = 0;
1850
1851         printf("NodeInfo Supported Qtypes");
1852         if (options & F_VERBOSE) {
1853                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
1854                         printf(", compressed bitmap");
1855                 else
1856                         printf(", raw bitmap");
1857         }
1858
1859         while (cp < end) {
1860                 clen = (size_t)(end - cp);
1861                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
1862                         if (clen == 0 || clen > MAXQTYPES / 8 ||
1863                             clen % sizeof(v)) {
1864                                 printf("???");
1865                                 return;
1866                         }
1867                 } else {
1868                         if (clen < sizeof(cbit) || clen % sizeof(v))
1869                                 return;
1870                         memcpy(&cbit, cp, sizeof(cbit));
1871                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
1872                             clen)
1873                                 return;
1874                         cp += sizeof(cbit);
1875                         clen = ntohs(cbit.words) * sizeof(v);
1876                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
1877                             MAXQTYPES)
1878                                 return;
1879                 }
1880
1881                 for (off = 0; off < clen; off += sizeof(v)) {
1882                         memcpy(&v, cp + off, sizeof(v));
1883                         v = (u_int32_t)ntohl(v);
1884                         b = pr_bitrange(v, (int)(cur + off * 8), b);
1885                 }
1886                 /* flush the remaining bits */
1887                 b = pr_bitrange(0, (int)(cur + off * 8), b);
1888
1889                 cp += clen;
1890                 cur += clen * 8;
1891                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
1892                         cur += ntohs(cbit.skip) * 32;
1893         }
1894 }
1895
1896 /* struct icmp6_nodeinfo *ni:   ni->qtype must be NODEADDR */
1897 void
1898 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
1899 {
1900         u_char *cp = (u_char *)(ni + 1);
1901         char ntop_buf[INET6_ADDRSTRLEN];
1902         int withttl = 0;
1903
1904         nilen -= sizeof(struct icmp6_nodeinfo);
1905
1906         if (options & F_VERBOSE) {
1907                 switch (ni->ni_code) {
1908                 case ICMP6_NI_REFUSED:
1909                         printf("refused");
1910                         break;
1911                 case ICMP6_NI_UNKNOWN:
1912                         printf("unknown qtype");
1913                         break;
1914                 }
1915                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
1916                         printf(" truncated");
1917         }
1918         putchar('\n');
1919         if (nilen <= 0)
1920                 printf("  no address\n");
1921
1922         /*
1923          * In icmp-name-lookups 05 and later, TTL of each returned address
1924          * is contained in the resposne. We try to detect the version
1925          * by the length of the data, but note that the detection algorithm
1926          * is incomplete. We assume the latest draft by default.
1927          */
1928         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
1929                 withttl = 1;
1930         while (nilen > 0) {
1931                 u_int32_t ttl = 0;
1932
1933                 if (withttl) {
1934                         /* XXX: alignment? */
1935                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
1936                         cp += sizeof(u_int32_t);
1937                         nilen -= sizeof(u_int32_t);
1938                 }
1939
1940                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
1941                     NULL)
1942                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
1943                 printf("  %s", ntop_buf);
1944                 if (withttl) {
1945                         if (ttl == 0xffffffff) {
1946                                 /*
1947                                  * XXX: can this convention be applied to all
1948                                  * type of TTL (i.e. non-ND TTL)?
1949                                  */
1950                                 printf("(TTL=infty)");
1951                         }
1952                         else
1953                                 printf("(TTL=%u)", ttl);
1954                 }
1955                 putchar('\n');
1956
1957                 nilen -= sizeof(struct in6_addr);
1958                 cp += sizeof(struct in6_addr);
1959         }
1960 }
1961
1962 int
1963 get_hoplim(struct msghdr *mhdr)
1964 {
1965         struct cmsghdr *cm;
1966
1967         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1968              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1969                 if (cm->cmsg_len == 0)
1970                         return(-1);
1971
1972                 if (cm->cmsg_level == IPPROTO_IPV6 &&
1973                     cm->cmsg_type == IPV6_HOPLIMIT &&
1974                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
1975                         return(*(int *)CMSG_DATA(cm));
1976         }
1977
1978         return(-1);
1979 }
1980
1981 struct in6_pktinfo *
1982 get_rcvpktinfo(struct msghdr *mhdr)
1983 {
1984         struct cmsghdr *cm;
1985
1986         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1987              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1988                 if (cm->cmsg_len == 0)
1989                         return(NULL);
1990
1991                 if (cm->cmsg_level == IPPROTO_IPV6 &&
1992                     cm->cmsg_type == IPV6_PKTINFO &&
1993                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
1994                         return((struct in6_pktinfo *)CMSG_DATA(cm));
1995         }
1996
1997         return(NULL);
1998 }
1999
2000 #ifdef IPV6_RECVPATHMTU
2001 int
2002 get_pathmtu(struct msghdr *mhdr)
2003 {
2004         struct cmsghdr *cm;
2005         struct ip6_mtuinfo *mtuctl = NULL;
2006
2007         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2008              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2009                 if (cm->cmsg_len == 0)
2010                         return(0);
2011
2012                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2013                     cm->cmsg_type == IPV6_PATHMTU &&
2014                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2015                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2016
2017                         /*
2018                          * If the notified destination is different from
2019                          * the one we are pinging, just ignore the info.
2020                          * We check the scope ID only when both notified value
2021                          * and our own value have non-0 values, because we may
2022                          * have used the default scope zone ID for sending,
2023                          * in which case the scope ID value is 0.
2024                          */
2025                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2026                                                 &dst.sin6_addr) ||
2027                             (mtuctl->ip6m_addr.sin6_scope_id &&
2028                              dst.sin6_scope_id &&
2029                              mtuctl->ip6m_addr.sin6_scope_id !=
2030                              dst.sin6_scope_id)) {
2031                                 if ((options & F_VERBOSE) != 0) {
2032                                         printf("path MTU for %s is notified. "
2033                                                "(ignored)\n",
2034                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2035                                            sizeof(mtuctl->ip6m_addr)));
2036                                 }
2037                                 return(0);
2038                         }
2039
2040                         /*
2041                          * Ignore an invalid MTU. XXX: can we just believe
2042                          * the kernel check?
2043                          */
2044                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2045                                 return(0);
2046
2047                         /* notification for our destination. return the MTU. */
2048                         return((int)mtuctl->ip6m_mtu);
2049                 }
2050         }
2051         return(0);
2052 }
2053 #endif
2054
2055 /*
2056  * tvsub --
2057  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2058  * be >= in.
2059  */
2060 void
2061 tvsub(struct timeval *out, struct timeval *in)
2062 {
2063         if ((out->tv_usec -= in->tv_usec) < 0) {
2064                 --out->tv_sec;
2065                 out->tv_usec += 1000000;
2066         }
2067         out->tv_sec -= in->tv_sec;
2068 }
2069
2070 /*
2071  * onint --
2072  *      SIGINT handler.
2073  */
2074 /* ARGSUSED */
2075 void
2076 onint(int sig __unused)
2077 {
2078         summary();
2079
2080         signal(SIGINT, SIG_DFL);
2081         kill(getpid(), SIGINT);
2082
2083         /* NOTREACHED */
2084         exit(1);
2085 }
2086
2087 /*
2088  * summary --
2089  *      Print out statistics.
2090  */
2091 void
2092 summary(void)
2093 {
2094
2095         printf("\n--- %s ping6 statistics ---\n", hostname);
2096         printf("%ld packets transmitted, ", ntransmitted);
2097         printf("%ld packets received, ", nreceived);
2098         if (nrepeats)
2099                 printf("+%ld duplicates, ", nrepeats);
2100         if (ntransmitted) {
2101                 if (nreceived > ntransmitted)
2102                         printf("-- somebody's duplicating packets!");
2103                 else
2104                         printf("%.1f%% packet loss",
2105                             ((((double)ntransmitted - nreceived) * 100.0) /
2106                             ntransmitted));
2107         }
2108         putchar('\n');
2109         if (nreceived && timing) {
2110                 /* Only display average to microseconds */
2111                 double num = nreceived + nrepeats;
2112                 double avg = tsum / num;
2113                 double dev = sqrt(tsumsq / num - avg * avg);
2114                 printf(
2115                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2116                     tmin, avg, tmax, dev);
2117                 fflush(stdout);
2118         }
2119         fflush(stdout);
2120 }
2121
2122 /*subject type*/
2123 static const char *niqcode[] = {
2124         "IPv6 address",
2125         "DNS label",    /*or empty*/
2126         "IPv4 address",
2127 };
2128
2129 /*result code*/
2130 static const char *nircode[] = {
2131         "Success", "Refused", "Unknown",
2132 };
2133
2134
2135 /*
2136  * pr_icmph --
2137  *      Print a descriptive string about an ICMP header.
2138  */
2139 void
2140 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2141 {
2142         char ntop_buf[INET6_ADDRSTRLEN];
2143         struct nd_redirect *red;
2144         struct icmp6_nodeinfo *ni;
2145         char dnsname[MAXDNAME + 1];
2146         const u_char *cp;
2147         size_t l;
2148
2149         switch (icp->icmp6_type) {
2150         case ICMP6_DST_UNREACH:
2151                 switch (icp->icmp6_code) {
2152                 case ICMP6_DST_UNREACH_NOROUTE:
2153                         printf("No Route to Destination\n");
2154                         break;
2155                 case ICMP6_DST_UNREACH_ADMIN:
2156                         printf("Destination Administratively "
2157                             "Unreachable\n");
2158                         break;
2159                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2160                         printf("Destination Unreachable Beyond Scope\n");
2161                         break;
2162                 case ICMP6_DST_UNREACH_ADDR:
2163                         printf("Destination Host Unreachable\n");
2164                         break;
2165                 case ICMP6_DST_UNREACH_NOPORT:
2166                         printf("Destination Port Unreachable\n");
2167                         break;
2168                 default:
2169                         printf("Destination Unreachable, Bad Code: %d\n",
2170                             icp->icmp6_code);
2171                         break;
2172                 }
2173                 /* Print returned IP header information */
2174                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2175                 break;
2176         case ICMP6_PACKET_TOO_BIG:
2177                 printf("Packet too big mtu = %d\n",
2178                     (int)ntohl(icp->icmp6_mtu));
2179                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2180                 break;
2181         case ICMP6_TIME_EXCEEDED:
2182                 switch (icp->icmp6_code) {
2183                 case ICMP6_TIME_EXCEED_TRANSIT:
2184                         printf("Time to live exceeded\n");
2185                         break;
2186                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2187                         printf("Frag reassembly time exceeded\n");
2188                         break;
2189                 default:
2190                         printf("Time exceeded, Bad Code: %d\n",
2191                             icp->icmp6_code);
2192                         break;
2193                 }
2194                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2195                 break;
2196         case ICMP6_PARAM_PROB:
2197                 printf("Parameter problem: ");
2198                 switch (icp->icmp6_code) {
2199                 case ICMP6_PARAMPROB_HEADER:
2200                         printf("Erroneous Header ");
2201                         break;
2202                 case ICMP6_PARAMPROB_NEXTHEADER:
2203                         printf("Unknown Nextheader ");
2204                         break;
2205                 case ICMP6_PARAMPROB_OPTION:
2206                         printf("Unrecognized Option ");
2207                         break;
2208                 default:
2209                         printf("Bad code(%d) ", icp->icmp6_code);
2210                         break;
2211                 }
2212                 printf("pointer = 0x%02x\n", (u_int32_t)ntohl(icp->icmp6_pptr));
2213                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2214                 break;
2215         case ICMP6_ECHO_REQUEST:
2216                 printf("Echo Request");
2217                 /* XXX ID + Seq + Data */
2218                 break;
2219         case ICMP6_ECHO_REPLY:
2220                 printf("Echo Reply");
2221                 /* XXX ID + Seq + Data */
2222                 break;
2223         case ICMP6_MEMBERSHIP_QUERY:
2224                 printf("Listener Query");
2225                 break;
2226         case ICMP6_MEMBERSHIP_REPORT:
2227                 printf("Listener Report");
2228                 break;
2229         case ICMP6_MEMBERSHIP_REDUCTION:
2230                 printf("Listener Done");
2231                 break;
2232         case ND_ROUTER_SOLICIT:
2233                 printf("Router Solicitation");
2234                 break;
2235         case ND_ROUTER_ADVERT:
2236                 printf("Router Advertisement");
2237                 break;
2238         case ND_NEIGHBOR_SOLICIT:
2239                 printf("Neighbor Solicitation");
2240                 break;
2241         case ND_NEIGHBOR_ADVERT:
2242                 printf("Neighbor Advertisement");
2243                 break;
2244         case ND_REDIRECT:
2245                 red = (struct nd_redirect *)icp;
2246                 printf("Redirect\n");
2247                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2248                     sizeof(ntop_buf)))
2249                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2250                 printf("Destination: %s", ntop_buf);
2251                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2252                     sizeof(ntop_buf)))
2253                         strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2254                 printf(" New Target: %s", ntop_buf);
2255                 break;
2256         case ICMP6_NI_QUERY:
2257                 printf("Node Information Query");
2258                 /* XXX ID + Seq + Data */
2259                 ni = (struct icmp6_nodeinfo *)icp;
2260                 l = end - (u_char *)(ni + 1);
2261                 printf(", ");
2262                 switch (ntohs(ni->ni_qtype)) {
2263                 case NI_QTYPE_NOOP:
2264                         printf("NOOP");
2265                         break;
2266                 case NI_QTYPE_SUPTYPES:
2267                         printf("Supported qtypes");
2268                         break;
2269                 case NI_QTYPE_FQDN:
2270                         printf("DNS name");
2271                         break;
2272                 case NI_QTYPE_NODEADDR:
2273                         printf("nodeaddr");
2274                         break;
2275                 case NI_QTYPE_IPV4ADDR:
2276                         printf("IPv4 nodeaddr");
2277                         break;
2278                 default:
2279                         printf("unknown qtype");
2280                         break;
2281                 }
2282                 if (options & F_VERBOSE) {
2283                         switch (ni->ni_code) {
2284                         case ICMP6_NI_SUBJ_IPV6:
2285                                 if (l == sizeof(struct in6_addr) &&
2286                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2287                                     sizeof(ntop_buf)) != NULL) {
2288                                         printf(", subject=%s(%s)",
2289                                             niqcode[ni->ni_code], ntop_buf);
2290                                 } else {
2291 #if 1
2292                                         /* backward compat to -W */
2293                                         printf(", oldfqdn");
2294 #else
2295                                         printf(", invalid");
2296 #endif
2297                                 }
2298                                 break;
2299                         case ICMP6_NI_SUBJ_FQDN:
2300                                 if (end == (u_char *)(ni + 1)) {
2301                                         printf(", no subject");
2302                                         break;
2303                                 }
2304                                 printf(", subject=%s", niqcode[ni->ni_code]);
2305                                 cp = (const u_char *)(ni + 1);
2306                                 if (dnsdecode(&cp, end, NULL, dnsname,
2307                                     sizeof(dnsname)) != NULL)
2308                                         printf("(%s)", dnsname);
2309                                 else
2310                                         printf("(invalid)");
2311                                 break;
2312                         case ICMP6_NI_SUBJ_IPV4:
2313                                 if (l == sizeof(struct in_addr) &&
2314                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2315                                     sizeof(ntop_buf)) != NULL) {
2316                                         printf(", subject=%s(%s)",
2317                                             niqcode[ni->ni_code], ntop_buf);
2318                                 } else
2319                                         printf(", invalid");
2320                                 break;
2321                         default:
2322                                 printf(", invalid");
2323                                 break;
2324                         }
2325                 }
2326                 break;
2327         case ICMP6_NI_REPLY:
2328                 printf("Node Information Reply");
2329                 /* XXX ID + Seq + Data */
2330                 ni = (struct icmp6_nodeinfo *)icp;
2331                 printf(", ");
2332                 switch (ntohs(ni->ni_qtype)) {
2333                 case NI_QTYPE_NOOP:
2334                         printf("NOOP");
2335                         break;
2336                 case NI_QTYPE_SUPTYPES:
2337                         printf("Supported qtypes");
2338                         break;
2339                 case NI_QTYPE_FQDN:
2340                         printf("DNS name");
2341                         break;
2342                 case NI_QTYPE_NODEADDR:
2343                         printf("nodeaddr");
2344                         break;
2345                 case NI_QTYPE_IPV4ADDR:
2346                         printf("IPv4 nodeaddr");
2347                         break;
2348                 default:
2349                         printf("unknown qtype");
2350                         break;
2351                 }
2352                 if (options & F_VERBOSE) {
2353                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2354                                 printf(", invalid");
2355                         else
2356                                 printf(", %s", nircode[ni->ni_code]);
2357                 }
2358                 break;
2359         default:
2360                 printf("Bad ICMP type: %d", icp->icmp6_type);
2361         }
2362 }
2363
2364 /*
2365  * pr_iph --
2366  *      Print an IP6 header.
2367  */
2368 void
2369 pr_iph(struct ip6_hdr *ip6)
2370 {
2371         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2372         u_int8_t tc;
2373         char ntop_buf[INET6_ADDRSTRLEN];
2374
2375         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2376         tc = (tc >> 4) & 0x0f;
2377         tc |= (ip6->ip6_vfc << 4);
2378
2379         printf("Vr TC  Flow Plen Nxt Hlim\n");
2380         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2381             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2382             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2383         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2384                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2385         printf("%s->", ntop_buf);
2386         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2387                 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2388         printf("%s\n", ntop_buf);
2389 }
2390
2391 /*
2392  * pr_addr --
2393  *      Return an ascii host address as a dotted quad and optionally with
2394  * a hostname.
2395  */
2396 const char *
2397 pr_addr(struct sockaddr *addr, int addrlen)
2398 {
2399         static char buf[NI_MAXHOST];
2400         int flag = 0;
2401
2402         if ((options & F_HOSTNAME) == 0)
2403                 flag |= NI_NUMERICHOST;
2404
2405         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2406                 return (buf);
2407         else
2408                 return "?";
2409 }
2410
2411 /*
2412  * pr_retip --
2413  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2414  */
2415 void
2416 pr_retip(struct ip6_hdr *ip6, u_char *end)
2417 {
2418         u_char *cp = (u_char *)ip6, nh;
2419         int hlen;
2420
2421         if (end - (u_char *)ip6 < (int)sizeof(*ip6)) {
2422                 printf("IP6");
2423                 goto trunc;
2424         }
2425         pr_iph(ip6);
2426         hlen = sizeof(*ip6);
2427
2428         nh = ip6->ip6_nxt;
2429         cp += hlen;
2430         while (end - cp >= 8) {
2431                 switch (nh) {
2432                 case IPPROTO_HOPOPTS:
2433                         printf("HBH ");
2434                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2435                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2436                         break;
2437                 case IPPROTO_DSTOPTS:
2438                         printf("DSTOPT ");
2439                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2440                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2441                         break;
2442                 case IPPROTO_FRAGMENT:
2443                         printf("FRAG ");
2444                         hlen = sizeof(struct ip6_frag);
2445                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2446                         break;
2447                 case IPPROTO_ROUTING:
2448                         printf("RTHDR ");
2449                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2450                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2451                         break;
2452 #ifdef IPSEC
2453                 case IPPROTO_AH:
2454                         printf("AH ");
2455                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2456                         nh = ((struct ah *)cp)->ah_nxt;
2457                         break;
2458 #endif
2459                 case IPPROTO_ICMPV6:
2460                         printf("ICMP6: type = %d, code = %d\n",
2461                             *cp, *(cp + 1));
2462                         return;
2463                 case IPPROTO_ESP:
2464                         printf("ESP\n");
2465                         return;
2466                 case IPPROTO_TCP:
2467                         printf("TCP: from port %u, to port %u (decimal)\n",
2468                             (*cp * 256 + *(cp + 1)),
2469                             (*(cp + 2) * 256 + *(cp + 3)));
2470                         return;
2471                 case IPPROTO_UDP:
2472                         printf("UDP: from port %u, to port %u (decimal)\n",
2473                             (*cp * 256 + *(cp + 1)),
2474                             (*(cp + 2) * 256 + *(cp + 3)));
2475                         return;
2476                 default:
2477                         printf("Unknown Header(%d)\n", nh);
2478                         return;
2479                 }
2480
2481                 if ((cp += hlen) >= end)
2482                         goto trunc;
2483         }
2484         if (end - cp < 8)
2485                 goto trunc;
2486
2487         putchar('\n');
2488         return;
2489
2490   trunc:
2491         printf("...\n");
2492         return;
2493 }
2494
2495 void
2496 fill(char *bp, char *patp)
2497 {
2498         int ii, jj, kk;
2499         int pat[16];
2500         char *cp;
2501
2502         for (cp = patp; *cp; cp++)
2503                 if (!isxdigit(*cp))
2504                         errx(1, "patterns must be specified as hex digits");
2505         ii = sscanf(patp,
2506             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2507             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2508             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2509             &pat[13], &pat[14], &pat[15]);
2510
2511 /* xxx */
2512         if (ii > 0)
2513                 for (kk = 0;
2514                     kk <= MAXDATALEN - (8 + (int)sizeof(struct tv32) + ii);
2515                     kk += ii)
2516                         for (jj = 0; jj < ii; ++jj)
2517                                 bp[jj + kk] = pat[jj];
2518         if (!(options & F_QUIET)) {
2519                 printf("PATTERN: 0x");
2520                 for (jj = 0; jj < ii; ++jj)
2521                         printf("%02x", bp[jj] & 0xFF);
2522                 printf("\n");
2523         }
2524 }
2525
2526 #ifdef IPSEC
2527 #ifdef IPSEC_POLICY_IPSEC
2528 int
2529 setpolicy(int so __unused, char *policy)
2530 {
2531         char *buf;
2532
2533         if (policy == NULL)
2534                 return 0;       /* ignore */
2535
2536         buf = ipsec_set_policy(policy, strlen(policy));
2537         if (buf == NULL)
2538                 errx(1, "%s", ipsec_strerror());
2539         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2540             ipsec_get_policylen(buf)) < 0)
2541                 warnx("Unable to set IPsec policy");
2542         free(buf);
2543
2544         return 0;
2545 }
2546 #endif
2547 #endif
2548
2549 char *
2550 nigroup(char *name)
2551 {
2552         char *p;
2553         char *q;
2554         MD5_CTX ctxt;
2555         u_int8_t digest[16];
2556         u_int8_t c;
2557         size_t l;
2558         char hbuf[NI_MAXHOST];
2559         struct in6_addr in6;
2560
2561         p = strchr(name, '.');
2562         if (!p)
2563                 p = name + strlen(name);
2564         l = p - name;
2565         if (l > 63 || l > sizeof(hbuf) - 1)
2566                 return NULL;    /*label too long*/
2567         strncpy(hbuf, name, l);
2568         hbuf[(int)l] = '\0';
2569
2570         for (q = name; *q; q++) {
2571                 if (isupper(*(unsigned char *)q))
2572                         *q = tolower(*(unsigned char *)q);
2573         }
2574
2575         /* generate 8 bytes of pseudo-random value. */
2576         memset(&ctxt, 0, sizeof(ctxt));
2577         MD5Init(&ctxt);
2578         c = l & 0xff;
2579         MD5Update(&ctxt, &c, sizeof(c));
2580         MD5Update(&ctxt, (unsigned char *)name, l);
2581         MD5Final(digest, &ctxt);
2582
2583         if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1)
2584                 return NULL;    /*XXX*/
2585         bcopy(digest, &in6.s6_addr[12], 4);
2586
2587         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2588                 return NULL;
2589
2590         return strdup(hbuf);
2591 }
2592
2593 void
2594 usage(void)
2595 {
2596         fprintf(stderr,
2597 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2598             "A"
2599 #endif
2600             "usage: ping6 [-"
2601             "d"
2602 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2603             "E"
2604 #endif
2605             "fH"
2606 #ifdef IPV6_USE_MIN_MTU
2607             "m"
2608 #endif
2609             "nNqtvwW] "
2610             "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2611             "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2612 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2613             " [-P policy]"
2614 #endif
2615             "\n"
2616             "             [-p pattern] [-S sourceaddr] [-s packetsize] "
2617             "[hops ...] host\n");
2618         exit(1);
2619 }