sbin/ping6/ping6.c

   1 /*      $KAME: ping6.c,v 1.126 2001/05/17 03:39:08 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 1.4.2.10 2002/12/09 03:04:44 suz Exp $
  34  * $DragonFly: src/sbin/ping6/ping6.c,v 1.8 2005/03/05 22:27:08 cpressey Exp $
  35  */
  36
  37 /*      BSDI    ping.c,v 2.3 1996/01/21 17:56:50 jch Exp        */
  38
  39 /*
  40  * Copyright (c) 1989, 1993
  41  *      The Regents of the University of California.  All rights reserved.
  42  *
  43  * This code is derived from software contributed to Berkeley by
  44  * Mike Muuss.
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  * 3. All advertising materials mentioning features or use of this software
  55  *    must display the following acknowledgement:
  56  *      This product includes software developed by the University of
  57  *      California, Berkeley and its contributors.
  58  * 4. Neither the name of the University nor the names of its contributors
  59  *    may be used to endorse or promote products derived from this software
  60  *    without specific prior written permission.
  61  *
  62  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  63  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  64  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  65  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  66  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  67  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  68  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  69  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  70  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  71  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  72  * SUCH DAMAGE.
  73  */
  74
  75 /*
  76  * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
  77  * measure round-trip-delays and packet loss across network paths.
  78  *
  79  * Author -
  80  *      Mike Muuss
  81  *      U. S. Army Ballistic Research Laboratory
  82  *      December, 1983
  83  *
  84  * Status -
  85  *      Public Domain.  Distribution Unlimited.
  86  * Bugs -
  87  *      More statistics could always be gathered.
  88  *      This program has to run SUID to ROOT to access the ICMP socket.
  89  */
  90 /*
  91  * NOTE:
  92  * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
  93  * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
  94  * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
  95  * network attached to 1 or more interfaces)
  96  */
  97
  98 #include <sys/param.h>
  99 #include <sys/uio.h>
 100 #include <sys/socket.h>
 101 #include <sys/time.h>
 102
 103 #include <net/if.h>
 104 #include <net/route.h>
 105
 106 #include <netinet/in.h>
 107 #include <netinet/ip6.h>
 108 #include <netinet/icmp6.h>
 109 #include <arpa/inet.h>
 110 #include <arpa/nameser.h>
 111 #include <netdb.h>
 112
 113 #include <ctype.h>
 114 #include <err.h>
 115 #include <errno.h>
 116 #include <fcntl.h>
 117 #include <math.h>
 118 #include <signal.h>
 119 #include <stdio.h>
 120 #include <stdlib.h>
 121 #include <string.h>
 122 #include <unistd.h>
 123
 124 #ifdef IPSEC
 125 #include <netinet6/ah.h>
 126 #include <netinet6/ipsec.h>
 127 #endif
 128
 129 #include <md5.h>
 130
 131 #define MAXPACKETLEN    131072
 132 #define IP6LEN          40
 133 #define ICMP6ECHOLEN    8       /* icmp echo header len excluding time */
 134 #define ICMP6ECHOTMLEN sizeof(struct timeval)
 135 #define ICMP6_NIQLEN    (ICMP6ECHOLEN + 8)
 136 /* FQDN case, 64 bits of nonce + 32 bits ttl */
 137 #define ICMP6_NIRLEN    (ICMP6ECHOLEN + 12)
 138 #define EXTRA           256     /* for AH and various other headers. weird. */
 139 #define DEFDATALEN      ICMP6ECHOTMLEN
 140 #define MAXDATALEN      MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
 141 #define NROUTES         9               /* number of record route slots */
 142
 143 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 144 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 145 #define SET(bit)        (A(bit) |= B(bit))
 146 #define CLR(bit)        (A(bit) &= (~B(bit)))
 147 #define TST(bit)        (A(bit) & B(bit))
 148
 149 #define F_FLOOD         0x0001
 150 #define F_INTERVAL      0x0002
 151 #define F_PINGFILLED    0x0008
 152 #define F_QUIET         0x0010
 153 #define F_RROUTE        0x0020
 154 #define F_SO_DEBUG      0x0040
 155 #define F_VERBOSE       0x0100
 156 #ifdef IPSEC
 157 #ifdef IPSEC_POLICY_IPSEC
 158 #define F_POLICY        0x0400
 159 #else
 160 #define F_AUTHHDR       0x0200
 161 #define F_ENCRYPT       0x0400
 162 #endif /*IPSEC_POLICY_IPSEC*/
 163 #endif /*IPSEC*/
 164 #define F_NODEADDR      0x0800
 165 #define F_FQDN          0x1000
 166 #define F_INTERFACE     0x2000
 167 #define F_SRCADDR       0x4000
 168 #ifdef IPV6_REACHCONF
 169 #define F_REACHCONF     0x8000
 170 #endif
 171 #define F_HOSTNAME      0x10000
 172 #define F_FQDNOLD       0x20000
 173 #define F_NIGROUP       0x40000
 174 #define F_SUPTYPES      0x80000
 175 #define F_NOMINMTU      0x100000
 176 #define F_NOUSERDATA    (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
 177 u_int options;
 178
 179 #define IN6LEN          sizeof(struct in6_addr)
 180 #define SA6LEN          sizeof(struct sockaddr_in6)
 181 #define DUMMY_PORT      10101
 182
 183 #define SIN6(s) ((struct sockaddr_in6 *)(s))
 184
 185 /*
 186  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 187  * number of received sequence numbers we can keep track of.  Change 128
 188  * to 8192 for complete accuracy...
 189  */
 190 #define MAX_DUP_CHK     (8 * 8192)
 191 int mx_dup_ck = MAX_DUP_CHK;
 192 char rcvd_tbl[MAX_DUP_CHK / 8];
 193
 194 struct addrinfo *res;
 195 struct sockaddr_in6 dst;        /* who to ping6 */
 196 struct sockaddr_in6 src;        /* src addr of this packet */
 197 int datalen = DEFDATALEN;
 198 int s;                          /* socket file descriptor */
 199 u_char outpack[MAXPACKETLEN];
 200 char BSPACE = '\b';             /* characters written for flood */
 201 char DOT = '.';
 202 char *hostname;
 203 int ident;                      /* process id to identify our packets */
 204 u_int8_t nonce[8];              /* nonce field for node information */
 205 struct in6_addr srcaddr;
 206 int hoplimit = -1;              /* hoplimit */
 207 int pathmtu = 0;                /* path MTU for the destination.  0 = unspec. */
 208
 209 /* counters */
 210 long npackets;                  /* max packets to transmit */
 211 long nreceived;                 /* # of packets we got back */
 212 long nrepeats;                  /* number of duplicates */
 213 long ntransmitted;              /* sequence # for outbound packets = #sent */
 214 struct timeval interval = {1, 0}; /* interval between packets */
 215
 216 /* timing */
 217 int timing;                     /* flag to do timing */
 218 double tmin = 999999999.0;      /* minimum round trip time */
 219 double tmax = 0.0;              /* maximum round trip time */
 220 double tsum = 0.0;              /* sum of all times, for doing average */
 221 double tsumsq = 0.0;            /* sum of all times squared, for std. dev. */
 222
 223 /* for node addresses */
 224 u_short naflags;
 225
 226 /* for ancillary data(advanced API) */
 227 struct msghdr smsghdr;
 228 struct iovec smsgiov;
 229 char *scmsg = 0;
 230
 231 volatile int signo;
 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
 242 #ifdef IPV6_RECVPATHMTU
 243 int      get_pathmtu(struct msghdr *);
 244 #else
 245 #define get_pathmtu(mhdr) (0)
 246 #endif
 247
 248 #ifdef IPV6_USE_MTU
 249 void     set_pathmtu(int);
 250 #else
 251 #define set_pathmtu(mtu)
 252 #endif
 253
 254 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
 255 void     onsignal(int);
 256 void     retransmit(void);
 257 void     onint(int);
 258 size_t   pingerlen(void);
 259 int      pinger(void);
 260 const char *pr_addr(struct sockaddr *, int);
 261 void     pr_icmph(struct icmp6_hdr *, u_char *);
 262 void     pr_iph(struct ip6_hdr *);
 263 void     pr_suptypes(struct icmp6_nodeinfo *, size_t);
 264 void     pr_nodeaddr(struct icmp6_nodeinfo *, int);
 265 int      myechoreply(const struct icmp6_hdr *);
 266 int      mynireply(const struct icmp6_nodeinfo *);
 267 char *dnsdecode(const u_char **, const u_char *, const u_char *,
 268         u_char *, size_t);
 269 void     pr_pack(u_char *, int, struct msghdr *);
 270 void     pr_exthdrs(struct msghdr *);
 271 void     pr_ip6opt(void *);
 272 void     pr_rthdr(void *);
 273 int      pr_bitrange(u_int32_t, int, int);
 274 void     pr_retip(struct ip6_hdr *, u_char *);
 275 void     summary(void);
 276 void     tvsub(struct timeval *, struct timeval *);
 277 int      setpolicy(int, char *);
 278 char    *nigroup(char *);
 279 void     usage(void);
 280
 281 int
 282 main(int argc, char **argv)
 283 {
 284         struct itimerval itimer;
 285         struct sockaddr_in6 from;
 286         struct timeval timeout, *tv;
 287         struct addrinfo hints;
 288         fd_set *fdmaskp;
 289         int fdmasks;
 290         int cc, i;
 291         int ch, fromlen, hold, packlen, preload, optval, ret_ga;
 292         u_char *datap, *packet;
 293         char *e, *target, *ifname = NULL;
 294         int ip6optlen = 0;
 295         struct cmsghdr *scmsgp = NULL;
 296         int sockbufsize = 0;
 297         int usepktinfo = 0;
 298         struct in6_pktinfo *pktinfo = NULL;
 299 #ifdef USE_RFC2292BIS
 300         struct ip6_rthdr *rthdr = NULL;
 301 #endif
 302 #ifdef IPSEC_POLICY_IPSEC
 303         char *policy_in = NULL;
 304         char *policy_out = NULL;
 305 #endif
 306         double intval;
 307         size_t rthlen;
 308
 309         /* just to be sure */
 310         memset(&smsghdr, 0, sizeof(smsghdr));
 311         memset(&smsgiov, 0, sizeof(smsgiov));
 312
 313         preload = 0;
 314         datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
 315 #ifndef IPSEC
 316 #define ADDOPTS
 317 #else
 318 #ifdef IPSEC_POLICY_IPSEC
 319 #define ADDOPTS "P:"
 320 #else
 321 #define ADDOPTS "AE"
 322 #endif /*IPSEC_POLICY_IPSEC*/
 323 #endif
 324         while ((ch = getopt(argc, argv,
 325             "a:b:c:dfHh:I:i:l:mnNp:qRS:s:tvwW" ADDOPTS)) != -1) {
 326 #undef ADDOPTS
 327                 switch (ch) {
 328                 case 'a':
 329                 {
 330                         char *cp;
 331
 332                         options &= ~F_NOUSERDATA;
 333                         options |= F_NODEADDR;
 334                         for (cp = optarg; *cp != '\0'; cp++) {
 335                                 switch (*cp) {
 336                                 case 'a':
 337                                         naflags |= NI_NODEADDR_FLAG_ALL;
 338                                         break;
 339                                 case 'c':
 340                                 case 'C':
 341                                         naflags |= NI_NODEADDR_FLAG_COMPAT;
 342                                         break;
 343                                 case 'l':
 344                                 case 'L':
 345                                         naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
 346                                         break;
 347                                 case 's':
 348                                 case 'S':
 349                                         naflags |= NI_NODEADDR_FLAG_SITELOCAL;
 350                                         break;
 351                                 case 'g':
 352                                 case 'G':
 353                                         naflags |= NI_NODEADDR_FLAG_GLOBAL;
 354                                         break;
 355                                 case 'A': /* experimental. not in the spec */
 356 #ifdef NI_NODEADDR_FLAG_ANYCAST
 357                                         naflags |= NI_NODEADDR_FLAG_ANYCAST;
 358                                         break;
 359 #else
 360                                         errx(1,
 361 "-a A is not supported on the platform");
 362                                         /*NOTREACHED*/
 363 #endif
 364                                 default:
 365                                         usage();
 366                                         /*NOTREACHED*/
 367                                 }
 368                         }
 369                         break;
 370                 }
 371                 case 'b':
 372 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 373                         sockbufsize = atoi(optarg);
 374 #else
 375                         err(1,
 376 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
 377 #endif
 378                         break;
 379                 case 'c':
 380                         npackets = strtol(optarg, &e, 10);
 381                         if (npackets <= 0 || *optarg == '\0' || *e != '\0')
 382                                 errx(1,
 383                                     "illegal number of packets -- %s", optarg);
 384                         break;
 385                 case 'd':
 386                         options |= F_SO_DEBUG;
 387                         break;
 388                 case 'f':
 389                         if (getuid()) {
 390                                 errno = EPERM;
 391                                 errx(1, "Must be superuser to flood ping");
 392                         }
 393                         options |= F_FLOOD;
 394                         setbuf(stdout, (char *)NULL);
 395                         break;
 396                 case 'H':
 397                         options |= F_HOSTNAME;
 398                         break;
 399                 case 'h':               /* hoplimit */
 400                         hoplimit = strtol(optarg, &e, 10);
 401                         if (255 < hoplimit || hoplimit < -1)
 402                                 errx(1,
 403                                     "illegal hoplimit -- %s", optarg);
 404                         break;
 405                 case 'I':
 406                         ifname = optarg;
 407                         options |= F_INTERFACE;
 408 #ifndef USE_SIN6_SCOPE_ID
 409                         usepktinfo++;
 410 #endif
 411                         break;
 412                 case 'i':               /* wait between sending packets */
 413                         intval = strtod(optarg, &e);
 414                         if (*optarg == '\0' || *e != '\0')
 415                                 errx(1, "illegal timing interval %s", optarg);
 416                         if (intval < 1 && getuid()) {
 417                                 errx(1, "%s: only root may use interval < 1s",
 418                                     strerror(EPERM));
 419                         }
 420                         interval.tv_sec = (long)intval;
 421                         interval.tv_usec =
 422                             (long)((intval - interval.tv_sec) * 1000000);
 423                         if (interval.tv_sec < 0)
 424                                 errx(1, "illegal timing interval %s", optarg);
 425                         /* less than 1/hz does not make sense */
 426                         if (interval.tv_sec == 0 && interval.tv_usec < 10000) {
 427                                 warnx("too small interval, raised to 0.01");
 428                                 interval.tv_usec = 10000;
 429                         }
 430                         options |= F_INTERVAL;
 431                         break;
 432                 case 'l':
 433                         if (getuid()) {
 434                                 errno = EPERM;
 435                                 errx(1, "Must be superuser to preload");
 436                         }
 437                         preload = strtol(optarg, &e, 10);
 438                         if (preload < 0 || *optarg == '\0' || *e != '\0')
 439                                 errx(1, "illegal preload value -- %s", optarg);
 440                         break;
 441                 case 'm':
 442 #ifdef IPV6_USE_MIN_MTU
 443                         options |= F_NOMINMTU;
 444                         break;
 445 #else
 446                         errx(1, "-%c is not supported on this platform", ch);
 447                         /*NOTREACHED*/
 448 #endif
 449                 case 'n':
 450                         options &= ~F_HOSTNAME;
 451                         break;
 452                 case 'N':
 453                         options |= F_NIGROUP;
 454                         break;
 455                 case 'p':               /* fill buffer with user pattern */
 456                         options |= F_PINGFILLED;
 457                         fill((char *)datap, optarg);
 458                                 break;
 459                 case 'q':
 460                         options |= F_QUIET;
 461                         break;
 462                 case 'R':
 463 #ifdef IPV6_REACHCONF
 464                         options |= F_REACHCONF;
 465                         break;
 466 #else
 467                         errx(1, "-R is not supported in this configuration");
 468 #endif
 469                 case 'S':
 470                         /* XXX: use getaddrinfo? */
 471                         if (inet_pton(AF_INET6, optarg, (void *)&srcaddr) != 1)
 472                                 errx(1, "invalid IPv6 address: %s", optarg);
 473                         options |= F_SRCADDR;
 474                         usepktinfo++;
 475                         break;
 476                 case 's':               /* size of packet to send */
 477                         datalen = strtol(optarg, &e, 10);
 478                         if (datalen <= 0 || *optarg == '\0' || *e != '\0')
 479                                 errx(1, "illegal datalen value -- %s", optarg);
 480                         if (datalen > MAXDATALEN) {
 481                                 errx(1,
 482                                     "datalen value too large, maximum is %d",
 483                                     MAXDATALEN);
 484                         }
 485                         break;
 486                 case 't':
 487                         options &= ~F_NOUSERDATA;
 488                         options |= F_SUPTYPES;
 489                         break;
 490                 case 'v':
 491                         options |= F_VERBOSE;
 492                         break;
 493                 case 'w':
 494                         options &= ~F_NOUSERDATA;
 495                         options |= F_FQDN;
 496                         break;
 497                 case 'W':
 498                         options &= ~F_NOUSERDATA;
 499                         options |= F_FQDNOLD;
 500                         break;
 501 #ifdef IPSEC
 502 #ifdef IPSEC_POLICY_IPSEC
 503                 case 'P':
 504                         options |= F_POLICY;
 505                         if (!strncmp("in", optarg, 2)) {
 506                                 if ((policy_in = strdup(optarg)) == NULL)
 507                                         errx(1, "strdup");
 508                         } else if (!strncmp("out", optarg, 3)) {
 509                                 if ((policy_out = strdup(optarg)) == NULL)
 510                                         errx(1, "strdup");
 511                         } else
 512                                 errx(1, "invalid security policy");
 513                         break;
 514 #else
 515                 case 'A':
 516                         options |= F_AUTHHDR;
 517                         break;
 518                 case 'E':
 519                         options |= F_ENCRYPT;
 520                         break;
 521 #endif /*IPSEC_POLICY_IPSEC*/
 522 #endif /*IPSEC*/
 523                 default:
 524                         usage();
 525                         /*NOTREACHED*/
 526                 }
 527         }
 528         argc -= optind;
 529         argv += optind;
 530
 531         if (argc < 1) {
 532                 usage();
 533                 /*NOTREACHED*/
 534         }
 535
 536         if (argc > 1) {
 537 #ifdef IPV6_RECVRTHDR   /* 2292bis */
 538                 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
 539                     argc - 1));
 540 #else  /* RFC2292 */
 541                 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
 542 #endif
 543                 if (rthlen == 0) {
 544                         errx(1, "too many intermediate hops");
 545                         /*NOTREACHED*/
 546                 }
 547                 ip6optlen += rthlen;
 548         }
 549
 550         if (options & F_NIGROUP) {
 551                 target = nigroup(argv[argc - 1]);
 552                 if (target == NULL) {
 553                         usage();
 554                         /*NOTREACHED*/
 555                 }
 556         } else
 557                 target = argv[argc - 1];
 558
 559         /* getaddrinfo */
 560         bzero(&hints, sizeof(struct addrinfo));
 561         hints.ai_flags = AI_CANONNAME;
 562         hints.ai_family = AF_INET6;
 563         hints.ai_socktype = SOCK_RAW;
 564         hints.ai_protocol = IPPROTO_ICMPV6;
 565
 566         ret_ga = getaddrinfo(target, NULL, &hints, &res);
 567         if (ret_ga) {
 568                 fprintf(stderr, "ping6: %s\n", gai_strerror(ret_ga));
 569                 exit(1);
 570         }
 571         if (res->ai_canonname)
 572                 hostname = res->ai_canonname;
 573         else
 574                 hostname = target;
 575
 576         if (!res->ai_addr)
 577                 errx(1, "getaddrinfo failed");
 578
 579         memcpy(&dst, res->ai_addr, res->ai_addrlen);
 580
 581         if ((s = socket(res->ai_family, res->ai_socktype,
 582             res->ai_protocol)) < 0)
 583                 err(1, "socket");
 584
 585         /*
 586          * let the kerel pass extension headers of incoming packets,
 587          * for privileged socket options
 588          */
 589         if ((options & F_VERBOSE) != 0) {
 590                 int opton = 1;
 591
 592 #ifdef IPV6_RECVHOPOPTS
 593                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
 594                     sizeof(opton)))
 595                         err(1, "setsockopt(IPV6_RECVHOPOPTS)");
 596 #else  /* old adv. API */
 597                 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
 598                     sizeof(opton)))
 599                         err(1, "setsockopt(IPV6_HOPOPTS)");
 600 #endif
 601 #ifdef IPV6_RECVDSTOPTS
 602                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
 603                     sizeof(opton)))
 604                         err(1, "setsockopt(IPV6_RECVDSTOPTS)");
 605 #else  /* old adv. API */
 606                 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
 607                     sizeof(opton)))
 608                         err(1, "setsockopt(IPV6_DSTOPTS)");
 609 #endif
 610 #ifdef IPV6_RECVRTHDRDSTOPTS
 611                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
 612                     sizeof(opton)))
 613                         err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
 614 #endif
 615         }
 616
 617         /* revoke root privilege */
 618         seteuid(getuid());
 619         setuid(getuid());
 620
 621         if (options & F_FLOOD && options & F_INTERVAL)
 622                 errx(1, "-f and -i incompatible options");
 623
 624         if ((options & F_NOUSERDATA) == 0) {
 625                 if (datalen >= (int)sizeof(struct timeval)) {
 626                         /* we can time transfer */
 627                         timing = 1;
 628                 } else
 629                         timing = 0;
 630                 /* in F_VERBOSE case, we may get non-echoreply packets*/
 631                 if (options & F_VERBOSE)
 632                         packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 633                 else
 634                         packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
 635         } else {
 636                 /* suppress timing for node information query */
 637                 timing = 0;
 638                 datalen = 2048;
 639                 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
 640         }
 641
 642         if (!(packet = (u_char *)malloc((u_int)packlen)))
 643                 err(1, "Unable to allocate packet");
 644         if (!(options & F_PINGFILLED))
 645                 for (i = ICMP6ECHOLEN; i < packlen; ++i)
 646                         *datap++ = i;
 647
 648         ident = getpid() & 0xFFFF;
 649 #ifndef __OpenBSD__
 650         gettimeofday(&timeout, NULL);
 651         srand((unsigned int)(timeout.tv_sec ^ timeout.tv_usec ^ (long)ident));
 652         memset(nonce, 0, sizeof(nonce));
 653         for (i = 0; i < (int)sizeof(nonce); i += sizeof(int))
 654                 *((int *)&nonce[i]) = rand();
 655 #else
 656         memset(nonce, 0, sizeof(nonce));
 657         for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t))
 658                 *((u_int32_t *)&nonce[i]) = arc4random();
 659 #endif
 660
 661         hold = 1;
 662
 663         if (options & F_SO_DEBUG)
 664                 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 665                     sizeof(hold));
 666         optval = IPV6_DEFHLIM;
 667         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 668                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
 669                     &optval, sizeof(optval)) == -1)
 670                         err(1, "IPV6_MULTICAST_HOPS");
 671 #ifdef IPV6_USE_MIN_MTU
 672         if ((options & F_NOMINMTU) == 0) {
 673                 optval = 1;
 674                 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 675                     &optval, sizeof(optval)) == -1)
 676                         err(1, "setsockopt(IPV6_USE_MIN_MTU)");
 677         }
 678 #ifdef IPV6_RECVPATHMTU
 679         else {
 680                 optval = 1;
 681                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
 682                     &optval, sizeof(optval)) == -1)
 683                         err(1, "setsockopt(IPV6_RECVPATHMTU)");
 684         }
 685 #endif /* IPV6_RECVPATHMTU */
 686 #endif /* IPV6_USE_MIN_MTU */
 687
 688 #ifdef IPSEC
 689 #ifdef IPSEC_POLICY_IPSEC
 690         if (options & F_POLICY) {
 691                 if (setpolicy(s, policy_in) < 0)
 692                         errx(1, "%s", ipsec_strerror());
 693                 if (setpolicy(s, policy_out) < 0)
 694                         errx(1, "%s", ipsec_strerror());
 695         }
 696 #else
 697         if (options & F_AUTHHDR) {
 698                 optval = IPSEC_LEVEL_REQUIRE;
 699 #ifdef IPV6_AUTH_TRANS_LEVEL
 700                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
 701                     &optval, sizeof(optval)) == -1)
 702                         err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
 703 #else /* old def */
 704                 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
 705                     &optval, sizeof(optval)) == -1)
 706                         err(1, "setsockopt(IPV6_AUTH_LEVEL)");
 707 #endif
 708         }
 709         if (options & F_ENCRYPT) {
 710                 optval = IPSEC_LEVEL_REQUIRE;
 711                 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
 712                     &optval, sizeof(optval)) == -1)
 713                         err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
 714         }
 715 #endif /*IPSEC_POLICY_IPSEC*/
 716 #endif
 717
 718 #ifdef ICMP6_FILTER
 719     {
 720         struct icmp6_filter filt;
 721         if (!(options & F_VERBOSE)) {
 722                 ICMP6_FILTER_SETBLOCKALL(&filt);
 723                 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
 724                     (options & F_NODEADDR) || (options & F_SUPTYPES))
 725                         ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
 726                 else
 727                         ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
 728         } else {
 729                 ICMP6_FILTER_SETPASSALL(&filt);
 730         }
 731         if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
 732             sizeof(filt)) < 0)
 733                 err(1, "setsockopt(ICMP6_FILTER)");
 734     }
 735 #endif /*ICMP6_FILTER*/
 736
 737         /* let the kerel pass extension headers of incoming packets */
 738         if ((options & F_VERBOSE) != 0) {
 739                 int opton = 1;
 740
 741 #ifdef IPV6_RECVRTHDR
 742                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
 743                     sizeof(opton)))
 744                         err(1, "setsockopt(IPV6_RECVRTHDR)");
 745 #else  /* old adv. API */
 746                 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
 747                     sizeof(opton)))
 748                         err(1, "setsockopt(IPV6_RTHDR)");
 749 #endif
 750         }
 751
 752 /*
 753         optval = 1;
 754         if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
 755                 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
 756                     &optval, sizeof(optval)) == -1)
 757                         err(1, "IPV6_MULTICAST_LOOP");
 758 */
 759
 760         /* Specify the outgoing interface and/or the source address */
 761         if (usepktinfo)
 762                 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
 763
 764         if (hoplimit != -1)
 765                 ip6optlen += CMSG_SPACE(sizeof(int));
 766
 767 #ifdef IPV6_REACHCONF
 768         if (options & F_REACHCONF)
 769                 ip6optlen += CMSG_SPACE(0);
 770 #endif
 771
 772         /* set IP6 packet options */
 773         if (ip6optlen) {
 774                 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
 775                         errx(1, "can't allocate enough memory");
 776                 smsghdr.msg_control = (caddr_t)scmsg;
 777                 smsghdr.msg_controllen = ip6optlen;
 778                 scmsgp = (struct cmsghdr *)scmsg;
 779         }
 780         if (usepktinfo) {
 781                 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
 782                 memset(pktinfo, 0, sizeof(*pktinfo));
 783                 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
 784                 scmsgp->cmsg_level = IPPROTO_IPV6;
 785                 scmsgp->cmsg_type = IPV6_PKTINFO;
 786                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 787         }
 788
 789         /* set the outgoing interface */
 790         if (ifname) {
 791 #ifndef USE_SIN6_SCOPE_ID
 792                 /* pktinfo must have already been allocated */
 793                 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
 794                         errx(1, "%s: invalid interface name", ifname);
 795 #else
 796                 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
 797                         errx(1, "%s: invalid interface name", ifname);
 798 #endif
 799         }
 800         /* set the source address */
 801         if (options & F_SRCADDR)/* pktinfo must be valid */
 802                 pktinfo->ipi6_addr = srcaddr;
 803
 804         if (hoplimit != -1) {
 805                 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
 806                 scmsgp->cmsg_level = IPPROTO_IPV6;
 807                 scmsgp->cmsg_type = IPV6_HOPLIMIT;
 808                 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
 809
 810                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 811         }
 812 #ifdef IPV6_REACHCONF
 813         if (options & F_REACHCONF) {
 814                 scmsgp->cmsg_len = CMSG_LEN(0);
 815                 scmsgp->cmsg_level = IPPROTO_IPV6;
 816                 scmsgp->cmsg_type = IPV6_REACHCONF;
 817
 818                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 819         }
 820 #endif
 821
 822         if (argc > 1) { /* some intermediate addrs are specified */
 823                 int hops, error;
 824 #ifdef USE_RFC2292BIS
 825                 int rthdrlen;
 826 #endif
 827
 828 #ifdef USE_RFC2292BIS
 829                 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
 830                 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
 831                 scmsgp->cmsg_level = IPPROTO_IPV6;
 832                 scmsgp->cmsg_type = IPV6_RTHDR;
 833                 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
 834                 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
 835                     IPV6_RTHDR_TYPE_0, argc - 1);
 836                 if (rthdr == NULL)
 837                         errx(1, "can't initialize rthdr");
 838 #else  /* old advanced API */
 839                 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
 840                     IPV6_RTHDR_TYPE_0)) == 0)
 841                         errx(1, "can't initialize rthdr");
 842 #endif /* USE_RFC2292BIS */
 843
 844                 for (hops = 0; hops < argc - 1; hops++) {
 845                         struct addrinfo *iaip;
 846
 847                         if ((error = getaddrinfo(argv[hops], NULL, &hints,
 848                             &iaip)))
 849                                 errx(1, "%s", gai_strerror(error));
 850                         if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6)
 851                                 errx(1,
 852                                     "bad addr family of an intermediate addr");
 853
 854 #ifdef USE_RFC2292BIS
 855                         if (inet6_rth_add(rthdr,
 856                             &(SIN6(iaip->ai_addr))->sin6_addr))
 857                                 errx(1, "can't add an intermediate node");
 858 #else  /* old advanced API */
 859                         if (inet6_rthdr_add(scmsgp,
 860                             &(SIN6(iaip->ai_addr))->sin6_addr,
 861                             IPV6_RTHDR_LOOSE))
 862                                 errx(1, "can't add an intermediate node");
 863 #endif /* USE_RFC2292BIS */
 864                         freeaddrinfo(iaip);
 865                 }
 866
 867 #ifndef USE_RFC2292BIS
 868                 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
 869                         errx(1, "can't set the last flag");
 870 #endif
 871
 872                 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
 873         }
 874
 875         {
 876                 /*
 877                  * source selection
 878                  */
 879                 int dummy, len = sizeof(src);
 880
 881                 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 882                         err(1, "UDP socket");
 883
 884                 src.sin6_family = AF_INET6;
 885                 src.sin6_addr = dst.sin6_addr;
 886                 src.sin6_port = ntohs(DUMMY_PORT);
 887                 src.sin6_scope_id = dst.sin6_scope_id;
 888
 889 #ifdef USE_RFC2292BIS
 890                 if (pktinfo &&
 891                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
 892                     (void *)pktinfo, sizeof(*pktinfo)))
 893                         err(1, "UDP setsockopt(IPV6_PKTINFO)");
 894
 895                 if (hoplimit != -1 &&
 896                     setsockopt(dummy, IPPROTO_IPV6, IPV6_HOPLIMIT,
 897                     (void *)&hoplimit, sizeof(hoplimit)))
 898                         err(1, "UDP setsockopt(IPV6_HOPLIMIT)");
 899
 900                 if (rthdr &&
 901                     setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
 902                     (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
 903                         err(1, "UDP setsockopt(IPV6_RTHDR)");
 904 #else  /* old advanced API */
 905                 if (smsghdr.msg_control &&
 906                     setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
 907                     (void *)smsghdr.msg_control, smsghdr.msg_controllen))
 908                         err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
 909 #endif
 910
 911                 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
 912                         err(1, "UDP connect");
 913
 914                 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
 915                         err(1, "getsockname");
 916
 917                 close(dummy);
 918         }
 919
 920 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
 921         if (sockbufsize) {
 922                 if (datalen > sockbufsize)
 923                         warnx("you need -b to increase socket buffer size");
 924                 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
 925                     sizeof(sockbufsize)) < 0)
 926                         err(1, "setsockopt(SO_SNDBUF)");
 927                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
 928                     sizeof(sockbufsize)) < 0)
 929                         err(1, "setsockopt(SO_RCVBUF)");
 930         }
 931         else {
 932                 if (datalen > 8 * 1024) /*XXX*/
 933                         warnx("you need -b to increase socket buffer size");
 934                 /*
 935                  * When pinging the broadcast address, you can get a lot of
 936                  * answers. Doing something so evil is useful if you are trying
 937                  * to stress the ethernet, or just want to fill the arp cache
 938                  * to get some stuff for /etc/ethers.
 939                  */
 940                 hold = 48 * 1024;
 941                 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
 942                     sizeof(hold));
 943         }
 944 #endif
 945
 946         optval = 1;
 947 #ifndef USE_SIN6_SCOPE_ID
 948 #ifdef IPV6_RECVPKTINFO
 949         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
 950             sizeof(optval)) < 0)
 951                 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
 952 #else  /* old adv. API */
 953         if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
 954             sizeof(optval)) < 0)
 955                 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
 956 #endif
 957 #endif /* USE_SIN6_SCOPE_ID */
 958 #ifdef IPV6_RECVHOPLIMIT
 959         if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
 960             sizeof(optval)) < 0)
 961                 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
 962 #else  /* old adv. API */
 963         if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
 964             sizeof(optval)) < 0)
 965                 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
 966 #endif
 967
 968         printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
 969             (unsigned long)(pingerlen() - 8));
 970         printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
 971         printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
 972
 973         while (preload--)               /* Fire off them quickies. */
 974                 pinger();
 975
 976         signal(SIGINT, onsignal);
 977 #ifdef SIGINFO
 978         signal(SIGINFO, onsignal);
 979 #endif
 980
 981         if ((options & F_FLOOD) == 0) {
 982                 signal(SIGALRM, onsignal);
 983                 itimer.it_interval = interval;
 984                 itimer.it_value = interval;
 985                 setitimer(ITIMER_REAL, &itimer, NULL);
 986                 if (ntransmitted == 0)
 987                         retransmit();
 988         }
 989
 990         fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
 991         if ((fdmaskp = malloc(fdmasks)) == NULL)
 992                 err(1, "malloc");
 993
 994         signo = seenalrm = seenint = 0;
 995 #ifdef SIGINFO
 996         seeninfo = 0;
 997 #endif
 998
 999         for (;;) {
1000                 struct msghdr m;
1001                 struct cmsghdr *cm;
1002                 u_char buf[1024];
1003                 struct iovec iov[2];
1004
1005                 /* signal handling */
1006                 if (seenalrm) {
1007                         retransmit();
1008                         seenalrm = 0;
1009                         continue;
1010                 }
1011                 if (seenint) {
1012                         onint(SIGINT);
1013                         seenint = 0;
1014                         continue;
1015                 }
1016 #ifdef SIGINFO
1017                 if (seeninfo) {
1018                         summary();
1019                         seeninfo = 0;
1020                         continue;
1021                 }
1022 #endif
1023
1024                 if (options & F_FLOOD) {
1025                         pinger();
1026                         timeout.tv_sec = 0;
1027                         timeout.tv_usec = 10000;
1028                         tv = &timeout;
1029                 } else
1030                         tv = NULL;
1031                 memset(fdmaskp, 0, fdmasks);
1032                 FD_SET(s, fdmaskp);
1033                 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1034                 if (cc < 0) {
1035                         if (errno != EINTR) {
1036                                 warn("select");
1037                                 sleep(1);
1038                         }
1039                         continue;
1040                 } else if (cc == 0)
1041                         continue;
1042
1043                 fromlen = sizeof(from);
1044                 m.msg_name = (caddr_t)&from;
1045                 m.msg_namelen = sizeof(from);
1046                 memset(&iov, 0, sizeof(iov));
1047                 iov[0].iov_base = (caddr_t)packet;
1048                 iov[0].iov_len = packlen;
1049                 m.msg_iov = iov;
1050                 m.msg_iovlen = 1;
1051                 cm = (struct cmsghdr *)buf;
1052                 m.msg_control = (caddr_t)buf;
1053                 m.msg_controllen = sizeof(buf);
1054
1055                 cc = recvmsg(s, &m, 0);
1056                 if (cc < 0) {
1057                         if (errno != EINTR) {
1058                                 warn("recvmsg");
1059                                 sleep(1);
1060                         }
1061                         continue;
1062                 } else if (cc == 0) {
1063                         int mtu;
1064
1065                         /*
1066                          * receive control messages only. Process the
1067                          * exceptions (currently the only possiblity is
1068                          * a path MTU notification.)
1069                          */
1070                         if ((mtu = get_pathmtu(&m)) > 0) {
1071                                 if ((options & F_VERBOSE) != 0) {
1072                                         printf("new path MTU (%d) is "
1073                                             "notified\n", mtu);
1074                                 }
1075                                 set_pathmtu(mtu);
1076                         }
1077                         continue;
1078                 } else {
1079                         /*
1080                          * an ICMPv6 message (probably an echoreply) arrived.
1081                          */
1082                         pr_pack(packet, cc, &m);
1083                 }
1084                 if (npackets && nreceived >= npackets)
1085                         break;
1086         }
1087         summary();
1088         exit(nreceived == 0);
1089 }
1090
1091 void
1092 onsignal(int sig)
1093 {
1094         signo = sig;
1095         switch (sig) {
1096         case SIGALRM:
1097                 seenalrm++;
1098                 break;
1099         case SIGINT:
1100                 seenint++;
1101                 break;
1102 #ifdef SIGINFO
1103         case SIGINFO:
1104                 seeninfo++;
1105                 break;
1106 #endif
1107         }
1108 }
1109
1110 /*
1111  * retransmit --
1112  *      This routine transmits another ping6.
1113  */
1114 void
1115 retransmit(void)
1116 {
1117         struct itimerval itimer;
1118
1119         if (pinger() == 0)
1120                 return;
1121
1122         /*
1123          * If we're not transmitting any more packets, change the timer
1124          * to wait two round-trip times if we've received any packets or
1125          * ten seconds if we haven't.
1126          */
1127 #define MAXWAIT         10
1128         if (nreceived) {
1129                 itimer.it_value.tv_sec =  2 * tmax / 1000;
1130                 if (itimer.it_value.tv_sec == 0)
1131                         itimer.it_value.tv_sec = 1;
1132         } else
1133                 itimer.it_value.tv_sec = MAXWAIT;
1134         itimer.it_interval.tv_sec = 0;
1135         itimer.it_interval.tv_usec = 0;
1136         itimer.it_value.tv_usec = 0;
1137
1138         signal(SIGALRM, onint);
1139         setitimer(ITIMER_REAL, &itimer, NULL);
1140 }
1141
1142 /*
1143  * pinger --
1144  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1145  * will be added on by the kernel.  The ID field is our UNIX process ID,
1146  * and the sequence number is an ascending integer.  The first 8 bytes
1147  * of the data portion are used to hold a UNIX "timeval" struct in VAX
1148  * byte-order, to compute the round-trip time.
1149  */
1150 size_t
1151 pingerlen(void)
1152 {
1153         size_t l;
1154
1155         if (options & F_FQDN)
1156                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1157         else if (options & F_FQDNOLD)
1158                 l = ICMP6_NIQLEN;
1159         else if (options & F_NODEADDR)
1160                 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1161         else if (options & F_SUPTYPES)
1162                 l = ICMP6_NIQLEN;
1163         else
1164                 l = ICMP6ECHOLEN + datalen;
1165
1166         return l;
1167 }
1168
1169 int
1170 pinger(void)
1171 {
1172         struct icmp6_hdr *icp;
1173         struct iovec iov[2];
1174         int i, cc;
1175         struct icmp6_nodeinfo *nip;
1176         int seq;
1177
1178         if (npackets && ntransmitted >= npackets)
1179                 return(-1);     /* no more transmission */
1180
1181         icp = (struct icmp6_hdr *)outpack;
1182         nip = (struct icmp6_nodeinfo *)outpack;
1183         memset(icp, 0, sizeof(*icp));
1184         icp->icmp6_cksum = 0;
1185         seq = ntransmitted++;
1186         CLR(seq % mx_dup_ck);
1187
1188         if (options & F_FQDN) {
1189                 icp->icmp6_type = ICMP6_NI_QUERY;
1190                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1191                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1192                 nip->ni_flags = htons(0);
1193
1194                 memcpy(nip->icmp6_ni_nonce, nonce,
1195                     sizeof(nip->icmp6_ni_nonce));
1196                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1197
1198                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1199                     sizeof(dst.sin6_addr));
1200                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1201                 datalen = 0;
1202         } else if (options & F_FQDNOLD) {
1203                 /* packet format in 03 draft - no Subject data on queries */
1204                 icp->icmp6_type = ICMP6_NI_QUERY;
1205                 icp->icmp6_code = 0;    /* code field is always 0 */
1206                 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1207                 nip->ni_flags = htons(0);
1208
1209                 memcpy(nip->icmp6_ni_nonce, nonce,
1210                     sizeof(nip->icmp6_ni_nonce));
1211                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1212
1213                 cc = ICMP6_NIQLEN;
1214                 datalen = 0;
1215         } else if (options & F_NODEADDR) {
1216                 icp->icmp6_type = ICMP6_NI_QUERY;
1217                 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1218                 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1219                 nip->ni_flags = naflags;
1220
1221                 memcpy(nip->icmp6_ni_nonce, nonce,
1222                     sizeof(nip->icmp6_ni_nonce));
1223                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1224
1225                 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1226                     sizeof(dst.sin6_addr));
1227                 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1228                 datalen = 0;
1229         } else if (options & F_SUPTYPES) {
1230                 icp->icmp6_type = ICMP6_NI_QUERY;
1231                 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;   /*empty*/
1232                 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1233                 /* we support compressed bitmap */
1234                 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1235
1236                 memcpy(nip->icmp6_ni_nonce, nonce,
1237                     sizeof(nip->icmp6_ni_nonce));
1238                 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1239                 cc = ICMP6_NIQLEN;
1240                 datalen = 0;
1241         } else {
1242                 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1243                 icp->icmp6_code = 0;
1244                 icp->icmp6_id = htons(ident);
1245                 icp->icmp6_seq = ntohs(seq);
1246                 if (timing)
1247                         gettimeofday((struct timeval *)
1248                                            &outpack[ICMP6ECHOLEN], NULL);
1249                 cc = ICMP6ECHOLEN + datalen;
1250         }
1251
1252 #ifdef DIAGNOSTIC
1253         if (pingerlen() != cc)
1254                 errx(1, "internal error; length mismatch");
1255 #endif
1256
1257         smsghdr.msg_name = (caddr_t)&dst;
1258         smsghdr.msg_namelen = sizeof(dst);
1259         memset(&iov, 0, sizeof(iov));
1260         iov[0].iov_base = (caddr_t)outpack;
1261         iov[0].iov_len = cc;
1262         smsghdr.msg_iov = iov;
1263         smsghdr.msg_iovlen = 1;
1264
1265         i = sendmsg(s, &smsghdr, 0);
1266
1267         if (i < 0 || i != cc)  {
1268                 if (i < 0)
1269                         warn("sendmsg");
1270                 printf("ping6: wrote %s %d chars, ret=%d\n", hostname, cc, i);
1271         }
1272         if (!(options & F_QUIET) && options & F_FLOOD)
1273                 write(STDOUT_FILENO, &DOT, 1);
1274
1275         return(0);
1276 }
1277
1278 int
1279 myechoreply(const struct icmp6_hdr *icp)
1280 {
1281         if (ntohs(icp->icmp6_id) == ident)
1282                 return 1;
1283         else
1284                 return 0;
1285 }
1286
1287 int
1288 mynireply(const struct icmp6_nodeinfo *nip)
1289 {
1290         if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1291             nonce + sizeof(u_int16_t),
1292             sizeof(nonce) - sizeof(u_int16_t)) == 0)
1293                 return 1;
1294         else
1295                 return 0;
1296 }
1297
1298 char *
1299 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, u_char *buf,
1300           size_t bufsiz)
1301 {
1302         int i = 0;
1303         const u_char *cp;
1304         char cresult[MAXDNAME + 1];
1305         const u_char *comp;
1306         int l;
1307
1308         cp = *sp;
1309         *buf = '\0';
1310
1311         if (cp >= ep)
1312                 return NULL;
1313         while (cp < ep) {
1314                 i = *cp;
1315                 if (i == 0 || cp != *sp) {
1316                         if (strlcat(buf, ".", bufsiz) >= bufsiz)
1317                                 return NULL;    /*result overrun*/
1318                 }
1319                 if (i == 0)
1320                         break;
1321                 cp++;
1322
1323                 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1324                         /* DNS compression */
1325                         if (!base)
1326                                 return NULL;
1327
1328                         comp = base + (i & 0x3f);
1329                         if (dnsdecode(&comp, cp, base, cresult,
1330                             sizeof(cresult)) == NULL)
1331                                 return NULL;
1332                         if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1333                                 return NULL;    /*result overrun*/
1334                         break;
1335                 } else if ((i & 0x3f) == i) {
1336                         if (i > ep - cp)
1337                                 return NULL;    /*source overrun*/
1338                         while (i-- > 0 && cp < ep) {
1339                                 l = snprintf(cresult, sizeof(cresult),
1340                                     isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1341                                 if (l >= (int)sizeof(cresult))
1342                                         return NULL;
1343                                 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1344                                         return NULL;    /*result overrun*/
1345                                 cp++;
1346                         }
1347                 } else
1348                         return NULL;    /*invalid label*/
1349         }
1350         if (i != 0)
1351                 return NULL;    /*not terminated*/
1352         cp++;
1353         *sp = cp;
1354         return buf;
1355 }
1356
1357 /*
1358  * pr_pack --
1359  *      Print out the packet, if it came from us.  This logic is necessary
1360  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1361  * which arrive ('tis only fair).  This permits multiple copies of this
1362  * program to be run without having intermingled output (or statistics!).
1363  */
1364 void
1365 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1366 {
1367 #define safeputc(c)     printf((isprint((c)) ? "%c" : "\\%03o"), c)
1368         struct icmp6_hdr *icp;
1369         struct icmp6_nodeinfo *ni;
1370         int i;
1371         int hoplim;
1372         struct sockaddr *from;
1373         int fromlen;
1374         u_char *cp = NULL, *dp, *end = buf + cc;
1375         struct in6_pktinfo *pktinfo = NULL;
1376         struct timeval tv, *tp;
1377         double triptime = 0;
1378         int dupflag;
1379         size_t off;
1380         int oldfqdn;
1381         u_int16_t seq;
1382         char dnsname[MAXDNAME + 1];
1383
1384         gettimeofday(&tv, NULL);
1385
1386         if (!mhdr || !mhdr->msg_name ||
1387             mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1388             ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1389                 if (options & F_VERBOSE)
1390                         warnx("invalid peername\n");
1391                 return;
1392         }
1393         from = (struct sockaddr *)mhdr->msg_name;
1394         fromlen = mhdr->msg_namelen;
1395         if (cc < (int)sizeof(struct icmp6_hdr)) {
1396                 if (options & F_VERBOSE)
1397                         warnx("packet too short (%d bytes) from %s\n", cc,
1398                             pr_addr(from, fromlen));
1399                 return;
1400         }
1401         icp = (struct icmp6_hdr *)buf;
1402         ni = (struct icmp6_nodeinfo *)buf;
1403         off = 0;
1404
1405         if ((hoplim = get_hoplim(mhdr)) == -1) {
1406                 warnx("failed to get receiving hop limit");
1407                 return;
1408         }
1409         if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1410                 warnx("failed to get receiving pakcet information");
1411                 return;
1412         }
1413
1414         if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1415                 seq = ntohs(icp->icmp6_seq);
1416                 ++nreceived;
1417                 if (timing) {
1418                         tp = (struct timeval *)(icp + 1);
1419                         tvsub(&tv, tp);
1420                         triptime = ((double)tv.tv_sec) * 1000.0 +
1421                             ((double)tv.tv_usec) / 1000.0;
1422                         tsum += triptime;
1423                         tsumsq += triptime * triptime;
1424                         if (triptime < tmin)
1425                                 tmin = triptime;
1426                         if (triptime > tmax)
1427                                 tmax = triptime;
1428                 }
1429
1430                 if (TST(seq % mx_dup_ck)) {
1431                         ++nrepeats;
1432                         --nreceived;
1433                         dupflag = 1;
1434                 } else {
1435                         SET(seq % mx_dup_ck);
1436                         dupflag = 0;
1437                 }
1438
1439                 if (options & F_QUIET)
1440                         return;
1441
1442                 if (options & F_FLOOD)
1443                         write(STDOUT_FILENO, &BSPACE, 1);
1444                 else {
1445                         printf("%d bytes from %s, icmp_seq=%u", cc,
1446                             pr_addr(from, fromlen), seq);
1447                         printf(" hlim=%d", hoplim);
1448                         if ((options & F_VERBOSE) != 0) {
1449                                 struct sockaddr_in6 dstsa;
1450
1451                                 memset(&dstsa, 0, sizeof(dstsa));
1452                                 dstsa.sin6_family = AF_INET6;
1453 #ifdef SIN6_LEN
1454                                 dstsa.sin6_len = sizeof(dstsa);
1455 #endif
1456                                 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1457                                 dstsa.sin6_addr = pktinfo->ipi6_addr;
1458                                 printf(" dst=%s",
1459                                     pr_addr((struct sockaddr *)&dstsa,
1460                                     sizeof(dstsa)));
1461                         }
1462                         if (timing)
1463                                 printf(" time=%g ms", triptime);
1464                         if (dupflag)
1465                                 printf("(DUP!)");
1466                         /* check the data */
1467                         cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1468                         dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1469                         for (i = 8; cp < end; ++i, ++cp, ++dp) {
1470                                 if (*cp != *dp) {
1471                                         printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1472                                         break;
1473                                 }
1474                         }
1475                 }
1476         } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1477                 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1478                 ++nreceived;
1479                 if (TST(seq % mx_dup_ck)) {
1480                         ++nrepeats;
1481                         --nreceived;
1482                         dupflag = 1;
1483                 } else {
1484                         SET(seq % mx_dup_ck);
1485                         dupflag = 0;
1486                 }
1487
1488                 if (options & F_QUIET)
1489                         return;
1490
1491                 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1492
1493                 switch (ntohs(ni->ni_code)) {
1494                 case ICMP6_NI_SUCCESS:
1495                         break;
1496                 case ICMP6_NI_REFUSED:
1497                         printf("refused, type 0x%x", ntohs(ni->ni_type));
1498                         goto fqdnend;
1499                 case ICMP6_NI_UNKNOWN:
1500                         printf("unknown, type 0x%x", ntohs(ni->ni_type));
1501                         goto fqdnend;
1502                 default:
1503                         printf("unknown code 0x%x, type 0x%x",
1504                             ntohs(ni->ni_code), ntohs(ni->ni_type));
1505                         goto fqdnend;
1506                 }
1507
1508                 switch (ntohs(ni->ni_qtype)) {
1509                 case NI_QTYPE_NOOP:
1510                         printf("NodeInfo NOOP");
1511                         break;
1512                 case NI_QTYPE_SUPTYPES:
1513                         pr_suptypes(ni, end - (u_char *)ni);
1514                         break;
1515                 case NI_QTYPE_NODEADDR:
1516                         pr_nodeaddr(ni, end - (u_char *)ni);
1517                         break;
1518                 case NI_QTYPE_FQDN:
1519                 default:        /* XXX: for backward compatibility */
1520                         cp = (u_char *)ni + ICMP6_NIRLEN;
1521                         if (buf[off + ICMP6_NIRLEN] ==
1522                             cc - off - ICMP6_NIRLEN - 1)
1523                                 oldfqdn = 1;
1524                         else
1525                                 oldfqdn = 0;
1526                         if (oldfqdn) {
1527                                 cp++;   /* skip length */
1528                                 while (cp < end) {
1529                                         safeputc(*cp & 0xff);
1530                                         cp++;
1531                                 }
1532                         } else {
1533                                 i = 0;
1534                                 while (cp < end) {
1535                                         if (dnsdecode((const u_char **)&cp, end,
1536                                             (const u_char *)(ni + 1), dnsname,
1537                                             sizeof(dnsname)) == NULL) {
1538                                                 printf("???");
1539                                                 break;
1540                                         }
1541                                         /*
1542                                          * name-lookup special handling for
1543                                          * truncated name
1544                                          */
1545                                         if (cp + 1 <= end && !*cp &&
1546                                             strlen(dnsname) > 0) {
1547                                                 dnsname[strlen(dnsname) - 1] = '\0';
1548                                                 cp++;
1549                                         }
1550                                         printf("%s%s", i > 0 ? "," : "",
1551                                             dnsname);
1552                                 }
1553                         }
1554                         if (options & F_VERBOSE) {
1555                                 int32_t ttl;
1556                                 int comma = 0;
1557
1558                                 printf(" (");   /*)*/
1559
1560                                 switch (ni->ni_code) {
1561                                 case ICMP6_NI_REFUSED:
1562                                         printf("refused");
1563                                         comma++;
1564                                         break;
1565                                 case ICMP6_NI_UNKNOWN:
1566                                         printf("unknwon qtype");
1567                                         comma++;
1568                                         break;
1569                                 }
1570
1571                                 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1572                                         /* case of refusion, unknown */
1573                                         /*(*/
1574                                         putchar(')');
1575                                         goto fqdnend;
1576                                 }
1577                                 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1578                                 if (comma)
1579                                         printf(",");
1580                                 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1581                                         printf("TTL=%d:meaningless", (int)ttl);
1582                                 } else {
1583                                         if (ttl < 0) {
1584                                                 printf("TTL=%d:invalid", ttl);
1585                                         } else
1586                                                 printf("TTL=%d", ttl);
1587                                 }
1588                                 comma++;
1589
1590                                 if (oldfqdn) {
1591                                         if (comma)
1592                                                 printf(",");
1593                                         printf("03 draft");
1594                                         comma++;
1595                                 } else {
1596                                         cp = (u_char *)ni + ICMP6_NIRLEN;
1597                                         if (cp == end) {
1598                                                 if (comma)
1599                                                         printf(",");
1600                                                 printf("no name");
1601                                                 comma++;
1602                                         }
1603                                 }
1604
1605                                 if (buf[off + ICMP6_NIRLEN] !=
1606                                     cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1607                                         if (comma)
1608                                                 printf(",");
1609                                         printf("invalid namelen:%d/%lu",
1610                                             buf[off + ICMP6_NIRLEN],
1611                                             (u_long)cc - off - ICMP6_NIRLEN - 1);
1612                                         comma++;
1613                                 }
1614                                 /*(*/
1615                                 putchar(')');
1616                         }
1617                 fqdnend:
1618                         ;
1619                 }
1620         } else {
1621                 /* We've got something other than an ECHOREPLY */
1622                 if (!(options & F_VERBOSE))
1623                         return;
1624                 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1625                 pr_icmph(icp, end);
1626         }
1627
1628         if (!(options & F_FLOOD)) {
1629                 putchar('\n');
1630                 if (options & F_VERBOSE)
1631                         pr_exthdrs(mhdr);
1632                 fflush(stdout);
1633         }
1634 #undef safeputc
1635 }
1636
1637 void
1638 pr_exthdrs(struct msghdr *mhdr)
1639 {
1640         struct cmsghdr *cm;
1641
1642         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1643              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1644                 if (cm->cmsg_level != IPPROTO_IPV6)
1645                         continue;
1646
1647                 switch (cm->cmsg_type) {
1648                 case IPV6_HOPOPTS:
1649                         printf("  HbH Options: ");
1650                         pr_ip6opt(CMSG_DATA(cm));
1651                         break;
1652                 case IPV6_DSTOPTS:
1653 #ifdef IPV6_RTHDRDSTOPTS
1654                 case IPV6_RTHDRDSTOPTS:
1655 #endif
1656                         printf("  Dst Options: ");
1657                         pr_ip6opt(CMSG_DATA(cm));
1658                         break;
1659                 case IPV6_RTHDR:
1660                         printf("  Routing: ");
1661                         pr_rthdr(CMSG_DATA(cm));
1662                         break;
1663                 }
1664         }
1665 }
1666
1667 #ifdef USE_RFC2292BIS
1668 void
1669 pr_ip6opt(void *extbuf)
1670 {
1671         struct ip6_hbh *ext;
1672         int currentlen;
1673         u_int8_t type;
1674         size_t extlen, len;
1675         void *databuf;
1676         size_t offset;
1677         u_int16_t value2;
1678         u_int32_t value4;
1679
1680         ext = (struct ip6_hbh *)extbuf;
1681         extlen = (ext->ip6h_len + 1) * 8;
1682         printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1683             (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1684
1685         currentlen = 0;
1686         while (1) {
1687                 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1688                     &type, &len, &databuf);
1689                 if (currentlen == -1)
1690                         break;
1691                 switch (type) {
1692                 /*
1693                  * Note that inet6_opt_next automatically skips any padding
1694                  * optins.
1695                  */
1696                 case IP6OPT_JUMBO:
1697                         offset = 0;
1698                         offset = inet6_opt_get_val(databuf, offset,
1699                             &value4, sizeof(value4));
1700                         printf("    Jumbo Payload Opt: Length %u\n",
1701                             (u_int32_t)ntohl(value4));
1702                         break;
1703                 case IP6OPT_ROUTER_ALERT:
1704                         offset = 0;
1705                         offset = inet6_opt_get_val(databuf, offset,
1706                                                    &value2, sizeof(value2));
1707                         printf("    Router Alert Opt: Type %u\n",
1708                             ntohs(value2));
1709                         break;
1710                 default:
1711                         printf("    Received Opt %u len %lu\n",
1712                             type, (unsigned long)len);
1713                         break;
1714                 }
1715         }
1716         return;
1717 }
1718 #else  /* !USE_RFC2292BIS */
1719 /* ARGSUSED */
1720 void
1721 pr_ip6opt(void *extbuf __unused)
1722 {
1723         putchar('\n');
1724         return;
1725 }
1726 #endif /* USE_RFC2292BIS */
1727
1728 #ifdef USE_RFC2292BIS
1729 void
1730 pr_rthdr(void *extbuf)
1731 {
1732         struct in6_addr *in6;
1733         char ntopbuf[INET6_ADDRSTRLEN];
1734         struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1735         int i, segments;
1736
1737         /* print fixed part of the header */
1738         printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1739             rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1740         if ((segments = inet6_rth_segments(extbuf)) >= 0)
1741                 printf("%d segments, ", segments);
1742         else
1743                 printf("segments unknown, ");
1744         printf("%d left\n", rh->ip6r_segleft);
1745
1746         for (i = 0; i < segments; i++) {
1747                 in6 = inet6_rth_getaddr(extbuf, i);
1748                 if (in6 == NULL)
1749                         printf("   [%d]<NULL>\n", i);
1750                 else {
1751                         if (!inet_ntop(AF_INET6, in6, ntopbuf,
1752                             sizeof(ntopbuf)))
1753                                 strncpy(ntopbuf, "?", sizeof(ntopbuf));
1754                         printf("   [%d]%s\n", i, ntopbuf);
1755                 }
1756         }
1757
1758         return;
1759
1760 }
1761
1762 #else  /* !USE_RFC2292BIS */
1763 /* ARGSUSED */
1764 void
1765 pr_rthdr(void *extbuf __unused)
1766 {
1767         putchar('\n');
1768         return;
1769 }
1770 #endif /* USE_RFC2292BIS */
1771
1772 int
1773 pr_bitrange(u_int32_t v, int ss, int ii)
1774 {
1775         int off;
1776         int i;
1777
1778         off = 0;
1779         while (off < 32) {
1780                 /* shift till we have 0x01 */
1781                 if ((v & 0x01) == 0) {
1782                         if (ii > 1)
1783                                 printf("-%u", s + off - 1);
1784                         ii = 0;
1785                         switch (v & 0x0f) {
1786                         case 0x00:
1787                                 v >>= 4;
1788                                 off += 4;
1789                                 continue;
1790                         case 0x08:
1791                                 v >>= 3;
1792                                 off += 3;
1793                                 continue;
1794                         case 0x04: case 0x0c:
1795                                 v >>= 2;
1796                                 off += 2;
1797                                 continue;
1798                         default:
1799                                 v >>= 1;
1800                                 off += 1;
1801                                 continue;
1802                         }
1803                 }
1804
1805                 /* we have 0x01 with us */
1806                 for (i = 0; i < 32 - off; i++) {
1807                         if ((v & (0x01 << i)) == 0)
1808                                 break;
1809                 }
1810                 if (!ii)
1811                         printf(" %u", ss + off);
1812                 ii += i;
1813                 v >>= i; off += i;
1814         }
1815         return ii;
1816 }
1817
1818 /* struct icmp6_nodeinfo *ni:   ni->qtype must be SUPTYPES */
1819 void
1820 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1821 {
1822         size_t clen;
1823         u_int32_t v;
1824         const u_char *cp, *end;
1825         u_int16_t cur;
1826         struct cbit {
1827                 u_int16_t words;        /*32bit count*/
1828                 u_int16_t skip;
1829         } cbit;
1830 #define MAXQTYPES       (1 << 16)
1831         size_t off;
1832         int b;
1833
1834         cp = (u_char *)(ni + 1);
1835         end = ((u_char *)ni) + nilen;
1836         cur = 0;
1837         b = 0;
1838
1839         printf("NodeInfo Supported Qtypes");
1840         if (options & F_VERBOSE) {
1841                 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
1842                         printf(", compressed bitmap");
1843                 else
1844                         printf(", raw bitmap");
1845         }
1846
1847         while (cp < end) {
1848                 clen = (size_t)(end - cp);
1849                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
1850                         if (clen == 0 || clen > MAXQTYPES / 8 ||
1851                             clen % sizeof(v)) {
1852                                 printf("???");
1853                                 return;
1854                         }
1855                 } else {
1856                         if (clen < sizeof(cbit) || clen % sizeof(v))
1857                                 return;
1858                         memcpy(&cbit, cp, sizeof(cbit));
1859                         if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
1860                             clen)
1861                                 return;
1862                         cp += sizeof(cbit);
1863                         clen = ntohs(cbit.words) * sizeof(v);
1864                         if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
1865                             MAXQTYPES)
1866                                 return;
1867                 }
1868
1869                 for (off = 0; off < clen; off += sizeof(v)) {
1870                         memcpy(&v, cp + off, sizeof(v));
1871                         v = (u_int32_t)ntohl(v);
1872                         b = pr_bitrange(v, (int)(cur + off * 8), b);
1873                 }
1874                 /* flush the remaining bits */
1875                 b = pr_bitrange(0, (int)(cur + off * 8), b);
1876
1877                 cp += clen;
1878                 cur += clen * 8;
1879                 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
1880                         cur += ntohs(cbit.skip) * 32;
1881         }
1882 }
1883
1884 /* struct icmp6_nodeinfo *ni:   ni->qtype must be NODEADDR */
1885 void
1886 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
1887 {
1888         u_char *cp = (u_char *)(ni + 1);
1889         char ntop_buf[INET6_ADDRSTRLEN];
1890         int withttl = 0;
1891
1892         nilen -= sizeof(struct icmp6_nodeinfo);
1893
1894         if (options & F_VERBOSE) {
1895                 switch (ni->ni_code) {
1896                 case ICMP6_NI_REFUSED:
1897                         printf("refused");
1898                         break;
1899                 case ICMP6_NI_UNKNOWN:
1900                         printf("unknown qtype");
1901                         break;
1902                 }
1903                 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
1904                         printf(" truncated");
1905         }
1906         putchar('\n');
1907         if (nilen <= 0)
1908                 printf("  no address\n");
1909
1910         /*
1911          * In icmp-name-lookups 05 and later, TTL of each returned address
1912          * is contained in the resposne. We try to detect the version
1913          * by the length of the data, but note that the detection algorithm
1914          * is incomplete. We assume the latest draft by default.
1915          */
1916         if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
1917                 withttl = 1;
1918         while (nilen > 0) {
1919                 u_int32_t ttl = 0;
1920
1921                 if (withttl) {
1922                         /* XXX: alignment? */
1923                         ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
1924                         cp += sizeof(u_int32_t);
1925                         nilen -= sizeof(u_int32_t);
1926                 }
1927
1928                 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
1929                     NULL)
1930                         strncpy(ntop_buf, "?", sizeof(ntop_buf));
1931                 printf("  %s", ntop_buf);
1932                 if (withttl) {
1933                         if (ttl == 0xffffffff) {
1934                                 /*
1935                                  * XXX: can this convention be applied to all
1936                                  * type of TTL (i.e. non-ND TTL)?
1937                                  */
1938                                 printf("(TTL=infty)");
1939                         }
1940                         else
1941                                 printf("(TTL=%u)", ttl);
1942                 }
1943                 putchar('\n');
1944
1945                 nilen -= sizeof(struct in6_addr);
1946                 cp += sizeof(struct in6_addr);
1947         }
1948 }
1949
1950 int
1951 get_hoplim(struct msghdr *mhdr)
1952 {
1953         struct cmsghdr *cm;
1954
1955         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1956              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1957                 if (cm->cmsg_len == 0)
1958                         return(-1);
1959
1960                 if (cm->cmsg_level == IPPROTO_IPV6 &&
1961                     cm->cmsg_type == IPV6_HOPLIMIT &&
1962                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
1963                         return(*(int *)CMSG_DATA(cm));
1964         }
1965
1966         return(-1);
1967 }
1968
1969 struct in6_pktinfo *
1970 get_rcvpktinfo(struct msghdr *mhdr)
1971 {
1972         struct cmsghdr *cm;
1973
1974         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1975              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1976                 if (cm->cmsg_len == 0)
1977                         return(NULL);
1978
1979                 if (cm->cmsg_level == IPPROTO_IPV6 &&
1980                     cm->cmsg_type == IPV6_PKTINFO &&
1981                     cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
1982                         return((struct in6_pktinfo *)CMSG_DATA(cm));
1983         }
1984
1985         return(NULL);
1986 }
1987
1988 #ifdef IPV6_RECVPATHMTU
1989 int
1990 get_pathmtu(struct msghdr *mhdr)
1991 {
1992         struct cmsghdr *cm;
1993         struct ip6_mtuinfo *mtuctl = NULL;
1994
1995         for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1996              cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1997                 if (cm->cmsg_len == 0)
1998                         return(0);
1999
2000                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2001                     cm->cmsg_type == IPV6_PATHMTU &&
2002                     cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2003                         mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2004
2005                         /*
2006                          * If the notified destination is different from
2007                          * the one we are pinging, just ignore the info.
2008                          * We check the scope ID only when both notified value
2009                          * and our own value have non-0 values, because we may
2010                          * have used the default scope zone ID for sending,
2011                          * in which case the scope ID value is 0.
2012                          */
2013                         if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2014                                                 &dst.sin6_addr) ||
2015                             (mtuctl->ip6m_addr.sin6_scope_id &&
2016                              dst.sin6_scope_id &&
2017                              mtuctl->ip6m_addr.sin6_scope_id !=
2018                              dst.sin6_scope_id)) {
2019                                 if ((options & F_VERBOSE) != 0) {
2020                                         printf("path MTU for %s is notified. "
2021                                                "(ignored)\n",
2022                                            pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2023                                            sizeof(mtuctl->ip6m_addr)));
2024                                 }
2025                                 return(0);
2026                         }
2027
2028                         /*
2029                          * Ignore an invalid MTU. XXX: can we just believe
2030                          * the kernel check?
2031                          */
2032                         if (mtuctl->ip6m_mtu < IPV6_MMTU)
2033                                 return(0);
2034
2035                         /* notification for our destination. return the MTU. */
2036                         return((int)mtuctl->ip6m_mtu);
2037                 }
2038         }
2039         return(0);
2040 }
2041 #endif
2042
2043 #ifdef IPV6_USE_MTU
2044 void
2045 set_pathmtu(int mtu)
2046 {
2047         static int firsttime = 1;
2048         struct cmsghdr *cm;
2049
2050         if (firsttime) {
2051                 int oldlen = smsghdr.msg_controllen;
2052                 char *oldbuf = smsghdr.msg_control;
2053
2054                 /* XXX: We need to enlarge control message buffer */
2055                 firsttime = 0;  /* prevent further enlargement */
2056
2057                 smsghdr.msg_controllen = oldlen + CMSG_SPACE(sizeof(int));
2058                 if ((smsghdr.msg_control =
2059                      (char *)malloc(smsghdr.msg_controllen)) == NULL)
2060                         err(1, "set_pathmtu: malloc");
2061                 cm = (struct cmsghdr *)CMSG_FIRSTHDR(&smsghdr);
2062                 cm->cmsg_len = CMSG_LEN(sizeof(int));
2063                 cm->cmsg_level = IPPROTO_IPV6;
2064                 cm->cmsg_type = IPV6_USE_MTU;
2065
2066                 cm = (struct cmsghdr *)CMSG_NXTHDR(&smsghdr, cm);
2067                 if (oldlen)
2068                         memcpy((void *)cm, (void *)oldbuf, oldlen);
2069
2070                 free(oldbuf);
2071         }
2072
2073         /*
2074          * look for a cmsgptr that points MTU structure.
2075          * XXX: this procedure seems redundant at this moment, but we'd better
2076          * keep the code generic enough for future extensions.
2077          */
2078         for (cm = CMSG_FIRSTHDR(&smsghdr); cm;
2079              cm = (struct cmsghdr *)CMSG_NXTHDR(&smsghdr, cm)) {
2080                 if (cm->cmsg_len == 0) /* XXX: paranoid check */
2081                         errx(1, "set_pathmtu: internal error");
2082
2083                 if (cm->cmsg_level == IPPROTO_IPV6 &&
2084                     cm->cmsg_type == IPV6_USE_MTU &&
2085                     cm->cmsg_len == CMSG_LEN(sizeof(int)))
2086                         break;
2087         }
2088
2089         if (cm == NULL)
2090                 errx(1, "set_pathmtu: internal error: no space for path MTU");
2091
2092         *(int *)CMSG_DATA(cm) = mtu;
2093 }
2094 #endif
2095
2096 /*
2097  * tvsub --
2098  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
2099  * be >= in.
2100  */
2101 void
2102 tvsub(struct timeval *out, struct timeval *in)
2103 {
2104         if ((out->tv_usec -= in->tv_usec) < 0) {
2105                 --out->tv_sec;
2106                 out->tv_usec += 1000000;
2107         }
2108         out->tv_sec -= in->tv_sec;
2109 }
2110
2111 /*
2112  * onint --
2113  *      SIGINT handler.
2114  */
2115 /* ARGSUSED */
2116 void
2117 onint(int sig __unused)
2118 {
2119         signal(SIGINT, SIG_IGN);
2120         signal(SIGALRM, SIG_IGN);
2121
2122         summary();
2123
2124         exit(nreceived == 0);
2125 }
2126
2127 /*
2128  * summary --
2129  *      Print out statistics.
2130  */
2131 void
2132 summary(void)
2133 {
2134
2135         printf("\n--- %s ping6 statistics ---\n", hostname);
2136         printf("%ld packets transmitted, ", ntransmitted);
2137         printf("%ld packets received, ", nreceived);
2138         if (nrepeats)
2139                 printf("+%ld duplicates, ", nrepeats);
2140         if (ntransmitted) {
2141                 if (nreceived > ntransmitted)
2142                         printf("-- somebody's printing up packets!");
2143                 else
2144                         printf("%d%% packet loss",
2145                             (int) (((ntransmitted - nreceived) * 100) /
2146                             ntransmitted));
2147         }
2148         putchar('\n');
2149         if (nreceived && timing) {
2150                 /* Only display average to microseconds */
2151                 double num = nreceived + nrepeats;
2152                 double avg = tsum / num;
2153                 double dev = sqrt(tsumsq / num - avg * avg);
2154                 printf(
2155                     "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2156                     tmin, avg, tmax, dev);
2157                 fflush(stdout);
2158         }
2159         fflush(stdout);
2160 }
2161
2162 /*subject type*/
2163 static const char *niqcode[] = {
2164         "IPv6 address",
2165         "DNS label",    /*or empty*/
2166         "IPv4 address",
2167 };
2168
2169 /*result code*/
2170 static const char *nircode[] = {
2171         "Success", "Refused", "Unknown",
2172 };
2173
2174
2175 /*
2176  * pr_icmph --
2177  *      Print a descriptive string about an ICMP header.
2178  */
2179 void
2180 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2181 {
2182         char ntop_buf[INET6_ADDRSTRLEN];
2183         struct nd_redirect *red;
2184         struct icmp6_nodeinfo *ni;
2185         char dnsname[MAXDNAME + 1];
2186         const u_char *cp;
2187         size_t l;
2188
2189         switch (icp->icmp6_type) {
2190         case ICMP6_DST_UNREACH:
2191                 switch (icp->icmp6_code) {
2192                 case ICMP6_DST_UNREACH_NOROUTE:
2193                         printf("No Route to Destination\n");
2194                         break;
2195                 case ICMP6_DST_UNREACH_ADMIN:
2196                         printf("Destination Administratively Unreachable\n");
2197                         break;
2198                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2199                         printf("Destination Unreachable Beyond Scope\n");
2200                         break;
2201                 case ICMP6_DST_UNREACH_ADDR:
2202                         printf("Destination Host Unreachable\n");
2203                         break;
2204                 case ICMP6_DST_UNREACH_NOPORT:
2205                         printf("Destination Port Unreachable\n");
2206                         break;
2207                 default:
2208                         printf("Destination Unreachable, Bad Code: %d\n",
2209                             icp->icmp6_code);
2210                         break;
2211                 }
2212                 /* Print returned IP header information */
2213                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2214                 break;
2215         case ICMP6_PACKET_TOO_BIG:
2216                 printf("Packet too big mtu = %d\n",
2217                     (int)ntohl(icp->icmp6_mtu));
2218                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2219                 break;
2220         case ICMP6_TIME_EXCEEDED:
2221                 switch (icp->icmp6_code) {
2222                 case ICMP6_TIME_EXCEED_TRANSIT:
2223                         printf("Time to live exceeded\n");
2224                         break;
2225                 case ICMP6_TIME_EXCEED_REASSEMBLY:
2226                         printf("Frag reassembly time exceeded\n");
2227                         break;
2228                 default:
2229                         printf("Time exceeded, Bad Code: %d\n",
2230                             icp->icmp6_code);
2231                         break;
2232                 }
2233                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2234                 break;
2235         case ICMP6_PARAM_PROB:
2236                 printf("Parameter problem: ");
2237                 switch (icp->icmp6_code) {
2238                 case ICMP6_PARAMPROB_HEADER:
2239                         printf("Erroneous Header ");
2240                         break;
2241                 case ICMP6_PARAMPROB_NEXTHEADER:
2242                         printf("Unknown Nextheader ");
2243                         break;
2244                 case ICMP6_PARAMPROB_OPTION:
2245                         printf("Unrecognized Option ");
2246                         break;
2247                 default:
2248                         printf("Bad code(%d) ", icp->icmp6_code);
2249                         break;
2250                 }
2251                 printf("pointer = 0x%02x\n", (u_int32_t)ntohl(icp->icmp6_pptr));
2252                 pr_retip((struct ip6_hdr *)(icp + 1), end);
2253                 break;
2254         case ICMP6_ECHO_REQUEST:
2255                 printf("Echo Request");
2256                 /* XXX ID + Seq + Data */
2257                 break;
2258         case ICMP6_ECHO_REPLY:
2259                 printf("Echo Reply");
2260                 /* XXX ID + Seq + Data */
2261                 break;
2262         case ICMP6_MEMBERSHIP_QUERY:
2263                 printf("Listener Query");
2264                 break;
2265         case ICMP6_MEMBERSHIP_REPORT:
2266                 printf("Listener Report");
2267                 break;
2268         case ICMP6_MEMBERSHIP_REDUCTION:
2269                 printf("Listener Done");
2270                 break;
2271         case ND_ROUTER_SOLICIT:
2272                 printf("Router Solicitation");
2273                 break;
2274         case ND_ROUTER_ADVERT:
2275                 printf("Router Advertisement");
2276                 break;
2277         case ND_NEIGHBOR_SOLICIT:
2278                 printf("Neighbor Solicitation");
2279                 break;
2280         case ND_NEIGHBOR_ADVERT:
2281                 printf("Neighbor Advertisement");
2282                 break;
2283         case ND_REDIRECT:
2284                 red = (struct nd_redirect *)icp;
2285                 printf("Redirect\n");
2286                 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2287                     sizeof(ntop_buf)))
2288                         strncpy(ntop_buf, "?", sizeof(ntop_buf));
2289                 printf("Destination: %s", ntop_buf);
2290                 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2291                     sizeof(ntop_buf)))
2292                         strncpy(ntop_buf, "?", sizeof(ntop_buf));
2293                 printf(" New Target: %s", ntop_buf);
2294                 break;
2295         case ICMP6_NI_QUERY:
2296                 printf("Node Information Query");
2297                 /* XXX ID + Seq + Data */
2298                 ni = (struct icmp6_nodeinfo *)icp;
2299                 l = end - (u_char *)(ni + 1);
2300                 printf(", ");
2301                 switch (ntohs(ni->ni_qtype)) {
2302                 case NI_QTYPE_NOOP:
2303                         printf("NOOP");
2304                         break;
2305                 case NI_QTYPE_SUPTYPES:
2306                         printf("Supported qtypes");
2307                         break;
2308                 case NI_QTYPE_FQDN:
2309                         printf("DNS name");
2310                         break;
2311                 case NI_QTYPE_NODEADDR:
2312                         printf("nodeaddr");
2313                         break;
2314                 case NI_QTYPE_IPV4ADDR:
2315                         printf("IPv4 nodeaddr");
2316                         break;
2317                 default:
2318                         printf("unknown qtype");
2319                         break;
2320                 }
2321                 if (options & F_VERBOSE) {
2322                         switch (ni->ni_code) {
2323                         case ICMP6_NI_SUBJ_IPV6:
2324                                 if (l == sizeof(struct in6_addr) &&
2325                                     inet_ntop(AF_INET6, ni + 1, ntop_buf,
2326                                     sizeof(ntop_buf)) != NULL) {
2327                                         printf(", subject=%s(%s)",
2328                                             niqcode[ni->ni_code], ntop_buf);
2329                                 } else {
2330 #if 1
2331                                         /* backward compat to -W */
2332                                         printf(", oldfqdn");
2333 #else
2334                                         printf(", invalid");
2335 #endif
2336                                 }
2337                                 break;
2338                         case ICMP6_NI_SUBJ_FQDN:
2339                                 if (end == (u_char *)(ni + 1)) {
2340                                         printf(", no subject");
2341                                         break;
2342                                 }
2343                                 printf(", subject=%s", niqcode[ni->ni_code]);
2344                                 cp = (const u_char *)(ni + 1);
2345                                 if (dnsdecode(&cp, end, NULL, dnsname,
2346                                     sizeof(dnsname)) != NULL)
2347                                         printf("(%s)", dnsname);
2348                                 else
2349                                         printf("(invalid)");
2350                                 break;
2351                         case ICMP6_NI_SUBJ_IPV4:
2352                                 if (l == sizeof(struct in_addr) &&
2353                                     inet_ntop(AF_INET, ni + 1, ntop_buf,
2354                                     sizeof(ntop_buf)) != NULL) {
2355                                         printf(", subject=%s(%s)",
2356                                             niqcode[ni->ni_code], ntop_buf);
2357                                 } else
2358                                         printf(", invalid");
2359                                 break;
2360                         default:
2361                                 printf(", invalid");
2362                                 break;
2363                         }
2364                 }
2365                 break;
2366         case ICMP6_NI_REPLY:
2367                 printf("Node Information Reply");
2368                 /* XXX ID + Seq + Data */
2369                 ni = (struct icmp6_nodeinfo *)icp;
2370                 printf(", ");
2371                 switch (ntohs(ni->ni_qtype)) {
2372                 case NI_QTYPE_NOOP:
2373                         printf("NOOP");
2374                         break;
2375                 case NI_QTYPE_SUPTYPES:
2376                         printf("Supported qtypes");
2377                         break;
2378                 case NI_QTYPE_FQDN:
2379                         printf("DNS name");
2380                         break;
2381                 case NI_QTYPE_NODEADDR:
2382                         printf("nodeaddr");
2383                         break;
2384                 case NI_QTYPE_IPV4ADDR:
2385                         printf("IPv4 nodeaddr");
2386                         break;
2387                 default:
2388                         printf("unknown qtype");
2389                         break;
2390                 }
2391                 if (options & F_VERBOSE) {
2392                         if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2393                                 printf(", invalid");
2394                         else
2395                                 printf(", %s", nircode[ni->ni_code]);
2396                 }
2397                 break;
2398         default:
2399                 printf("Bad ICMP type: %d", icp->icmp6_type);
2400         }
2401 }
2402
2403 /*
2404  * pr_iph --
2405  *      Print an IP6 header.
2406  */
2407 void
2408 pr_iph(struct ip6_hdr *ip6)
2409 {
2410         u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2411         u_int8_t tc;
2412         char ntop_buf[INET6_ADDRSTRLEN];
2413
2414         tc = *(&ip6->ip6_vfc + 1); /* XXX */
2415         tc = (tc >> 4) & 0x0f;
2416         tc |= (ip6->ip6_vfc << 4);
2417
2418         printf("Vr TC  Flow Plen Nxt Hlim\n");
2419         printf(" %1x %02x %05x %04x  %02x   %02x\n",
2420             (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2421             ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2422         if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2423                 strncpy(ntop_buf, "?", sizeof(ntop_buf));
2424         printf("%s->", ntop_buf);
2425         if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2426                 strncpy(ntop_buf, "?", sizeof(ntop_buf));
2427         printf("%s\n", ntop_buf);
2428 }
2429
2430 /*
2431  * pr_addr --
2432  *      Return an ascii host address as a dotted quad and optionally with
2433  * a hostname.
2434  */
2435 const char *
2436 pr_addr(struct sockaddr *addr, int addrlen)
2437 {
2438         static char buf[NI_MAXHOST];
2439         int flag;
2440
2441 #ifdef NI_WITHSCOPEID
2442         flag = NI_WITHSCOPEID;
2443 #else
2444         flag = 0;
2445 #endif
2446         if ((options & F_HOSTNAME) == 0)
2447                 flag |= NI_NUMERICHOST;
2448
2449         if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2450                 return (buf);
2451         else
2452                 return "?";
2453 }
2454
2455 /*
2456  * pr_retip --
2457  *      Dump some info on a returned (via ICMPv6) IPv6 packet.
2458  */
2459 void
2460 pr_retip(struct ip6_hdr *ip6, u_char *end)
2461 {
2462         u_char *cp = (u_char *)ip6, nh;
2463         int hlen;
2464
2465         if (end - (u_char *)ip6 < (int)sizeof(*ip6)) {
2466                 printf("IP6");
2467                 goto trunc;
2468         }
2469         pr_iph(ip6);
2470         hlen = sizeof(*ip6);
2471
2472         nh = ip6->ip6_nxt;
2473         cp += hlen;
2474         while (end - cp >= 8) {
2475                 switch (nh) {
2476                 case IPPROTO_HOPOPTS:
2477                         printf("HBH ");
2478                         hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2479                         nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2480                         break;
2481                 case IPPROTO_DSTOPTS:
2482                         printf("DSTOPT ");
2483                         hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2484                         nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2485                         break;
2486                 case IPPROTO_FRAGMENT:
2487                         printf("FRAG ");
2488                         hlen = sizeof(struct ip6_frag);
2489                         nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2490                         break;
2491                 case IPPROTO_ROUTING:
2492                         printf("RTHDR ");
2493                         hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2494                         nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2495                         break;
2496 #ifdef IPSEC
2497                 case IPPROTO_AH:
2498                         printf("AH ");
2499                         hlen = (((struct ah *)cp)->ah_len+2) << 2;
2500                         nh = ((struct ah *)cp)->ah_nxt;
2501                         break;
2502 #endif
2503                 case IPPROTO_ICMPV6:
2504                         printf("ICMP6: type = %d, code = %d\n",
2505                             *cp, *(cp + 1));
2506                         return;
2507                 case IPPROTO_ESP:
2508                         printf("ESP\n");
2509                         return;
2510                 case IPPROTO_TCP:
2511                         printf("TCP: from port %u, to port %u (decimal)\n",
2512                             (*cp * 256 + *(cp + 1)),
2513                             (*(cp + 2) * 256 + *(cp + 3)));
2514                         return;
2515                 case IPPROTO_UDP:
2516                         printf("UDP: from port %u, to port %u (decimal)\n",
2517                             (*cp * 256 + *(cp + 1)),
2518                             (*(cp + 2) * 256 + *(cp + 3)));
2519                         return;
2520                 default:
2521                         printf("Unknown Header(%d)\n", nh);
2522                         return;
2523                 }
2524
2525                 if ((cp += hlen) >= end)
2526                         goto trunc;
2527         }
2528         if (end - cp < 8)
2529                 goto trunc;
2530
2531         putchar('\n');
2532         return;
2533
2534   trunc:
2535         printf("...\n");
2536         return;
2537 }
2538
2539 void
2540 fill(char *bp, char *patp)
2541 {
2542         int ii, jj, kk;
2543         int pat[16];
2544         char *cp;
2545
2546         for (cp = patp; *cp; cp++)
2547                 if (!isxdigit(*cp))
2548                         errx(1, "patterns must be specified as hex digits");
2549         ii = sscanf(patp,
2550             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2551             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2552             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2553             &pat[13], &pat[14], &pat[15]);
2554
2555 /* xxx */
2556         if (ii > 0)
2557                 for (kk = 0;
2558                     kk <= MAXDATALEN - (8 + (int)sizeof(struct timeval) + ii);
2559                     kk += ii)
2560                         for (jj = 0; jj < ii; ++jj)
2561                                 bp[jj + kk] = pat[jj];
2562         if (!(options & F_QUIET)) {
2563                 printf("PATTERN: 0x");
2564                 for (jj = 0; jj < ii; ++jj)
2565                         printf("%02x", bp[jj] & 0xFF);
2566                 printf("\n");
2567         }
2568 }
2569
2570 #ifdef IPSEC
2571 #ifdef IPSEC_POLICY_IPSEC
2572 int
2573 setpolicy(int so __unused, char *policy)
2574 {
2575         char *buf;
2576
2577         if (policy == NULL)
2578                 return 0;       /* ignore */
2579
2580         buf = ipsec_set_policy(policy, strlen(policy));
2581         if (buf == NULL)
2582                 errx(1, "%s", ipsec_strerror());
2583         if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2584             ipsec_get_policylen(buf)) < 0)
2585                 warnx("Unable to set IPSec policy");
2586         free(buf);
2587
2588         return 0;
2589 }
2590 #endif
2591 #endif
2592
2593 char *
2594 nigroup(char *name)
2595 {
2596         char *p;
2597         unsigned char *q;
2598         MD5_CTX ctxt;
2599         u_int8_t digest[16];
2600         u_int8_t c;
2601         size_t l;
2602         char hbuf[NI_MAXHOST];
2603         struct in6_addr in6;
2604
2605         p = strchr(name, '.');
2606         if (!p)
2607                 p = name + strlen(name);
2608         l = p - name;
2609         if (l > 63 || l > sizeof(hbuf) - 1)
2610                 return NULL;    /*label too long*/
2611         strncpy(hbuf, name, l);
2612         hbuf[(int)l] = '\0';
2613
2614         for (q = name; *q; q++) {
2615                 if (isupper(*q))
2616                         *q = tolower(*q);
2617         }
2618
2619         /* generate 8 bytes of pseudo-random value. */
2620         bzero(&ctxt, sizeof(ctxt));
2621         MD5Init(&ctxt);
2622         c = l & 0xff;
2623         MD5Update(&ctxt, &c, sizeof(c));
2624         MD5Update(&ctxt, name, l);
2625         MD5Final(digest, &ctxt);
2626
2627         if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1)
2628                 return NULL;    /*XXX*/
2629         bcopy(digest, &in6.s6_addr[12], 4);
2630
2631         if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2632                 return NULL;
2633
2634         return strdup(hbuf);
2635 }
2636
2637 void
2638 usage(void)
2639 {
2640         fprintf(stderr,
2641             "usage: ping6 [-dfH"
2642 #ifdef IPV6_USE_MIN_MTU
2643             "m"
2644 #endif
2645             "nNqtvwW"
2646 #ifdef IPV6_REACHCONF
2647             "R"
2648 #endif
2649 #ifdef IPSEC
2650 #ifdef IPSEC_POLICY_IPSEC
2651             "] [-P policy"
2652 #else
2653             "AE"
2654 #endif
2655 #endif
2656             "] [-a [aAclsg]] [-b sockbufsiz] [-c count] \n"
2657             "\t[-I interface] [-i wait] [-l preload] [-p pattern] "
2658             "[-S sourceaddr]\n"
2659             "\t[-s packetsize] [-h hoplimit] [hops...] host\n");
2660         exit(1);
2661 }