usr.sbin/ndp/ndp.c

   1 /*      $FreeBSD$       */
   2 /*      $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $   */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 /*
  33  * Copyright (c) 1984, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * Sun Microsystems, Inc.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  */
  63
  64 /*
  65  * Based on:
  66  * "@(#) Copyright (c) 1984, 1993\n\
  67  *      The Regents of the University of California.  All rights reserved.\n";
  68  *
  69  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  70  */
  71
  72 /*
  73  * ndp - display, set, delete and flush neighbor cache
  74  */
  75
  76
  77 #include <sys/param.h>
  78 #include <sys/file.h>
  79 #include <sys/ioctl.h>
  80 #include <sys/socket.h>
  81 #include <sys/sysctl.h>
  82 #include <sys/time.h>
  83 #include <sys/queue.h>
  84
  85 #include <net/if.h>
  86 #include <net/if_var.h>
  87 #include <net/if_dl.h>
  88 #include <net/if_types.h>
  89 #include <net/route.h>
  90
  91 #include <netinet/in.h>
  92 #include <netinet/if_ether.h>
  93
  94 #include <netinet/icmp6.h>
  95 #include <netinet6/in6_var.h>
  96 #include <netinet6/nd6.h>
  97
  98 #include <arpa/inet.h>
  99
 100 #include <netdb.h>
 101 #include <errno.h>
 102 #include <nlist.h>
 103 #include <stdio.h>
 104 #include <string.h>
 105 #include <paths.h>
 106 #include <err.h>
 107 #include <stdlib.h>
 108 #include <fcntl.h>
 109 #include <unistd.h>
 110 #include "gmt2local.h"
 111
 112 /* packing rule for routing socket */
 113 #define ROUNDUP(a) \
 114         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 115 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 116
 117 static pid_t pid;
 118 static int nflag;
 119 static int tflag;
 120 static int32_t thiszone;        /* time difference with gmt */
 121 static int s = -1;
 122 static int repeat = 0;
 123
 124 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 125 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 126 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 127
 128 int main __P((int, char **));
 129 int file __P((char *));
 130 void getsocket __P((void));
 131 int set __P((int, char **));
 132 void get __P((char *));
 133 int delete __P((char *));
 134 void dump __P((struct in6_addr *, int));
 135 static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *, int, int));
 136 static char *ether_str __P((struct sockaddr_dl *));
 137 int ndp_ether_aton __P((char *, u_char *));
 138 void usage __P((void));
 139 int rtmsg __P((int));
 140 void ifinfo __P((char *, int, char **));
 141 void rtrlist __P((void));
 142 void plist __P((void));
 143 void pfx_flush __P((void));
 144 void rtr_flush __P((void));
 145 void harmonize_rtr __P((void));
 146 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 147 static void getdefif __P((void));
 148 static void setdefif __P((char *));
 149 #endif
 150 static char *sec2str __P((time_t));
 151 static char *ether_str __P((struct sockaddr_dl *));
 152 static void ts_print __P((const struct timeval *));
 153
 154 #ifdef ICMPV6CTL_ND6_DRLIST
 155 static char *rtpref_str[] = {
 156         "medium",               /* 00 */
 157         "high",                 /* 01 */
 158         "rsv",                  /* 10 */
 159         "low"                   /* 11 */
 160 };
 161 #endif
 162
 163 int mode = 0;
 164 char *arg = NULL;
 165
 166 int
 167 main(argc, argv)
 168         int argc;
 169         char **argv;
 170 {
 171         int ch;
 172
 173         pid = getpid();
 174         thiszone = gmt2local(0);
 175         while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
 176                 switch (ch) {
 177                 case 'a':
 178                 case 'c':
 179                 case 'p':
 180                 case 'r':
 181                 case 'H':
 182                 case 'P':
 183                 case 'R':
 184                 case 's':
 185                 case 'I':
 186                         if (mode) {
 187                                 usage();
 188                                 /*NOTREACHED*/
 189                         }
 190                         mode = ch;
 191                         arg = NULL;
 192                         break;
 193                 case 'd':
 194                 case 'f':
 195                 case 'i' :
 196                         if (mode) {
 197                                 usage();
 198                                 /*NOTREACHED*/
 199                         }
 200                         mode = ch;
 201                         arg = optarg;
 202                         break;
 203                 case 'n':
 204                         nflag = 1;
 205                         break;
 206                 case 't':
 207                         tflag = 1;
 208                         break;
 209                 case 'A':
 210                         if (mode) {
 211                                 usage();
 212                                 /*NOTREACHED*/
 213                         }
 214                         mode = 'a';
 215                         repeat = atoi(optarg);
 216                         if (repeat < 0) {
 217                                 usage();
 218                                 /*NOTREACHED*/
 219                         }
 220                         break;
 221                 default:
 222                         usage();
 223                 }
 224
 225         argc -= optind;
 226         argv += optind;
 227
 228         switch (mode) {
 229         case 'a':
 230         case 'c':
 231                 if (argc != 0) {
 232                         usage();
 233                         /*NOTREACHED*/
 234                 }
 235                 dump(0, mode == 'c');
 236                 break;
 237         case 'd':
 238                 if (argc != 0) {
 239                         usage();
 240                         /*NOTREACHED*/
 241                 }
 242                 delete(arg);
 243                 break;
 244         case 'I':
 245 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 246                 if (argc > 1) {
 247                         usage();
 248                         /*NOTREACHED*/
 249                 } else if (argc == 1) {
 250                         if (strcmp(*argv, "delete") == 0 ||
 251                             if_nametoindex(*argv))
 252                                 setdefif(*argv);
 253                         else
 254                                 errx(1, "invalid interface %s", *argv);
 255                 }
 256                 getdefif(); /* always call it to print the result */
 257                 break;
 258 #else
 259                 errx(1, "not supported yet");
 260                 /*NOTREACHED*/
 261 #endif
 262         case 'p':
 263                 if (argc != 0) {
 264                         usage();
 265                         /*NOTREACHED*/
 266                 }
 267                 plist();
 268                 break;
 269         case 'i':
 270                 ifinfo(arg, argc, argv);
 271                 break;
 272         case 'r':
 273                 if (argc != 0) {
 274                         usage();
 275                         /*NOTREACHED*/
 276                 }
 277                 rtrlist();
 278                 break;
 279         case 's':
 280                 if (argc < 2 || argc > 4)
 281                         usage();
 282                 exit(set(argc, argv) ? 1 : 0);
 283         case 'H':
 284                 if (argc != 0) {
 285                         usage();
 286                         /*NOTREACHED*/
 287                 }
 288                 harmonize_rtr();
 289                 break;
 290         case 'P':
 291                 if (argc != 0) {
 292                         usage();
 293                         /*NOTREACHED*/
 294                 }
 295                 pfx_flush();
 296                 break;
 297         case 'R':
 298                 if (argc != 0) {
 299                         usage();
 300                         /*NOTREACHED*/
 301                 }
 302                 rtr_flush();
 303                 break;
 304         case 0:
 305                 if (argc != 1) {
 306                         usage();
 307                         /*NOTREACHED*/
 308                 }
 309                 get(argv[0]);
 310                 break;
 311         }
 312         exit(0);
 313 }
 314
 315 /*
 316  * Process a file to set standard ndp entries
 317  */
 318 int
 319 file(name)
 320         char *name;
 321 {
 322         FILE *fp;
 323         int i, retval;
 324         char line[100], arg[5][50], *args[5];
 325
 326         if ((fp = fopen(name, "r")) == NULL) {
 327                 fprintf(stderr, "ndp: cannot open %s\n", name);
 328                 exit(1);
 329         }
 330         args[0] = &arg[0][0];
 331         args[1] = &arg[1][0];
 332         args[2] = &arg[2][0];
 333         args[3] = &arg[3][0];
 334         args[4] = &arg[4][0];
 335         retval = 0;
 336         while (fgets(line, sizeof(line), fp) != NULL) {
 337                 i = sscanf(line, "%49s %49s %49s %49s %49s",
 338                     arg[0], arg[1], arg[2], arg[3], arg[4]);
 339                 if (i < 2) {
 340                         fprintf(stderr, "ndp: bad line: %s\n", line);
 341                         retval = 1;
 342                         continue;
 343                 }
 344                 if (set(i, args))
 345                         retval = 1;
 346         }
 347         fclose(fp);
 348         return (retval);
 349 }
 350
 351 void
 352 getsocket()
 353 {
 354         if (s < 0) {
 355                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 356                 if (s < 0) {
 357                         err(1, "socket");
 358                         /* NOTREACHED */
 359                 }
 360         }
 361 }
 362
 363 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 364 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 365 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 366 int     expire_time, flags, found_entry;
 367 struct  {
 368         struct  rt_msghdr m_rtm;
 369         char    m_space[512];
 370 }       m_rtmsg;
 371
 372 /*
 373  * Set an individual neighbor cache entry
 374  */
 375 int
 376 set(argc, argv)
 377         int argc;
 378         char **argv;
 379 {
 380         register struct sockaddr_in6 *sin = &sin_m;
 381         register struct sockaddr_dl *sdl;
 382         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 383         struct addrinfo hints, *res;
 384         int gai_error;
 385         u_char *ea;
 386         char *host = argv[0], *eaddr = argv[1];
 387
 388         getsocket();
 389         argc -= 2;
 390         argv += 2;
 391         sdl_m = blank_sdl;
 392         sin_m = blank_sin;
 393
 394         bzero(&hints, sizeof(hints));
 395         hints.ai_family = AF_INET6;
 396         gai_error = getaddrinfo(host, NULL, &hints, &res);
 397         if (gai_error) {
 398                 fprintf(stderr, "ndp: %s: %s\n", host,
 399                         gai_strerror(gai_error));
 400                 return 1;
 401         }
 402         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 403 #ifdef __KAME__
 404         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 405                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 406                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 407         }
 408 #endif
 409         ea = (u_char *)LLADDR(&sdl_m);
 410         if (ndp_ether_aton(eaddr, ea) == 0)
 411                 sdl_m.sdl_alen = 6;
 412         flags = expire_time = 0;
 413         while (argc-- > 0) {
 414                 if (strncmp(argv[0], "temp", 4) == 0) {
 415                         struct timeval time;
 416
 417                         gettimeofday(&time, 0);
 418                         expire_time = time.tv_sec + 20 * 60;
 419                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 420                         flags |= RTF_ANNOUNCE;
 421                 argv++;
 422         }
 423         if (rtmsg(RTM_GET) < 0) {
 424                 errx(1, "RTM_GET(%s) failed", host);
 425                 /* NOTREACHED */
 426         }
 427         sin = (struct sockaddr_in6 *)(rtm + 1);
 428         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 429         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 430                 if (sdl->sdl_family == AF_LINK &&
 431                     (rtm->rtm_flags & RTF_LLINFO) &&
 432                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 433                         switch (sdl->sdl_type) {
 434                         case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 435                         case IFT_ISO88024: case IFT_ISO88025:
 436                                 goto overwrite;
 437                         }
 438                 }
 439                 /*
 440                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 441                  */
 442                 fprintf(stderr, "set: cannot configure a new entry\n");
 443                 return 1;
 444         }
 445
 446 overwrite:
 447         if (sdl->sdl_family != AF_LINK) {
 448                 printf("cannot intuit interface index and type for %s\n", host);
 449                 return (1);
 450         }
 451         sdl_m.sdl_type = sdl->sdl_type;
 452         sdl_m.sdl_index = sdl->sdl_index;
 453         return (rtmsg(RTM_ADD));
 454 }
 455
 456 /*
 457  * Display an individual neighbor cache entry
 458  */
 459 void
 460 get(host)
 461         char *host;
 462 {
 463         struct sockaddr_in6 *sin = &sin_m;
 464         struct addrinfo hints, *res;
 465         int gai_error;
 466
 467         sin_m = blank_sin;
 468         bzero(&hints, sizeof(hints));
 469         hints.ai_family = AF_INET6;
 470         gai_error = getaddrinfo(host, NULL, &hints, &res);
 471         if (gai_error) {
 472                 fprintf(stderr, "ndp: %s: %s\n", host,
 473                     gai_strerror(gai_error));
 474                 return;
 475         }
 476         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 477 #ifdef __KAME__
 478         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 479                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 480                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 481         }
 482 #endif
 483         dump(&sin->sin6_addr, 0);
 484         if (found_entry == 0) {
 485                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 486                     sizeof(host_buf), NULL ,0,
 487                     (nflag ? NI_NUMERICHOST : 0));
 488                 printf("%s (%s) -- no entry\n", host, host_buf);
 489                 exit(1);
 490         }
 491 }
 492
 493 /*
 494  * Delete a neighbor cache entry
 495  */
 496 int
 497 delete(host)
 498         char *host;
 499 {
 500         struct sockaddr_in6 *sin = &sin_m;
 501         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 502         struct sockaddr_dl *sdl;
 503         struct addrinfo hints, *res;
 504         int gai_error;
 505
 506         getsocket();
 507         sin_m = blank_sin;
 508
 509         bzero(&hints, sizeof(hints));
 510         hints.ai_family = AF_INET6;
 511         gai_error = getaddrinfo(host, NULL, &hints, &res);
 512         if (gai_error) {
 513                 fprintf(stderr, "ndp: %s: %s\n", host,
 514                     gai_strerror(gai_error));
 515                 return 1;
 516         }
 517         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 518 #ifdef __KAME__
 519         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 520                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 521                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 522         }
 523 #endif
 524         if (rtmsg(RTM_GET) < 0) {
 525                 errx(1, "RTM_GET(%s) failed", host);
 526                 /* NOTREACHED */
 527         }
 528         sin = (struct sockaddr_in6 *)(rtm + 1);
 529         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 530         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 531                 if (sdl->sdl_family == AF_LINK &&
 532                     (rtm->rtm_flags & RTF_LLINFO) &&
 533                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 534                         goto delete;
 535                 }
 536                 /*
 537                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 538                  */
 539                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 540                 return 1;
 541         }
 542
 543 delete:
 544         if (sdl->sdl_family != AF_LINK) {
 545                 printf("cannot locate %s\n", host);
 546                 return (1);
 547         }
 548         if (rtmsg(RTM_DELETE) == 0) {
 549                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 550
 551 #ifdef __KAME__
 552                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 553                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 554                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 555                 }
 556 #endif
 557                 getnameinfo((struct sockaddr *)&s6,
 558                     s6.sin6_len, host_buf,
 559                     sizeof(host_buf), NULL, 0,
 560                     (nflag ? NI_NUMERICHOST : 0));
 561                 printf("%s (%s) deleted\n", host, host_buf);
 562         }
 563
 564         return 0;
 565 }
 566
 567 #define W_ADDR  36
 568 #define W_LL    17
 569 #define W_IF    6
 570
 571 /*
 572  * Dump the entire neighbor cache
 573  */
 574 void
 575 dump(addr, cflag)
 576         struct in6_addr *addr;
 577         int cflag;
 578 {
 579         int mib[6];
 580         size_t needed;
 581         char *lim, *buf, *next;
 582         struct rt_msghdr *rtm;
 583         struct sockaddr_in6 *sin;
 584         struct sockaddr_dl *sdl;
 585         extern int h_errno;
 586         struct in6_nbrinfo *nbi;
 587         struct timeval time;
 588         int addrwidth;
 589         int llwidth;
 590         int ifwidth;
 591         char flgbuf[8];
 592         char *ifname;
 593
 594         /* Print header */
 595         if (!tflag && !cflag)
 596                 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 597                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 598                     W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 599
 600 again:;
 601         mib[0] = CTL_NET;
 602         mib[1] = PF_ROUTE;
 603         mib[2] = 0;
 604         mib[3] = AF_INET6;
 605         mib[4] = NET_RT_FLAGS;
 606         mib[5] = RTF_LLINFO;
 607         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 608                 err(1, "sysctl(PF_ROUTE estimate)");
 609         if (needed > 0) {
 610                 if ((buf = malloc(needed)) == NULL)
 611                         err(1, "malloc");
 612                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 613                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 614                 lim = buf + needed;
 615         } else
 616                 buf = lim = NULL;
 617
 618         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 619                 int isrouter = 0, prbs = 0;
 620
 621                 rtm = (struct rt_msghdr *)next;
 622                 sin = (struct sockaddr_in6 *)(rtm + 1);
 623                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 624
 625                 /*
 626                  * Some OSes can produce a route that has the LINK flag but
 627                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 628                  * and BSD/OS, where xx is not the interface identifier on
 629                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 630                  * so we skip them.
 631                  * XXX: such routes should have the GATEWAY flag, not the
 632                  * LINK flag.  However, there is rotten routing software
 633                  * that advertises all routes that have the GATEWAY flag.
 634                  * Thus, KAME kernel intentionally does not set the LINK flag.
 635                  * What is to be fixed is not ndp, but such routing software
 636                  * (and the kernel workaround)...
 637                  */
 638                 if (sdl->sdl_family != AF_LINK)
 639                         continue;
 640
 641                 if (!(rtm->rtm_flags & RTF_HOST))
 642                         continue;
 643
 644                 if (addr) {
 645                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 646                                 continue;
 647                         found_entry = 1;
 648                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 649                         continue;
 650                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 651                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 652                         /* XXX: should scope id be filled in the kernel? */
 653                         if (sin->sin6_scope_id == 0)
 654                                 sin->sin6_scope_id = sdl->sdl_index;
 655 #ifdef __KAME__
 656                         /* KAME specific hack; removed the embedded id */
 657                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 658 #endif
 659                 }
 660                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 661                     sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
 662                 if (cflag) {
 663 #ifdef RTF_WASCLONED
 664                         if (rtm->rtm_flags & RTF_WASCLONED)
 665                                 delete(host_buf);
 666 #elif defined(RTF_CLONED)
 667                         if (rtm->rtm_flags & RTF_CLONED)
 668                                 delete(host_buf);
 669 #else
 670                         delete(host_buf);
 671 #endif
 672                         continue;
 673                 }
 674                 gettimeofday(&time, 0);
 675                 if (tflag)
 676                         ts_print(&time);
 677
 678                 addrwidth = strlen(host_buf);
 679                 if (addrwidth < W_ADDR)
 680                         addrwidth = W_ADDR;
 681                 llwidth = strlen(ether_str(sdl));
 682                 if (W_ADDR + W_LL - addrwidth > llwidth)
 683                         llwidth = W_ADDR + W_LL - addrwidth;
 684                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 685                 if (!ifname)
 686                         ifname = "?";
 687                 ifwidth = strlen(ifname);
 688                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 689                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 690
 691                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 692                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 693
 694                 /* Print neighbor discovery specific informations */
 695                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 696                 if (nbi) {
 697                         if (nbi->expire > time.tv_sec) {
 698                                 printf(" %-9.9s",
 699                                     sec2str(nbi->expire - time.tv_sec));
 700                         } else if (nbi->expire == 0)
 701                                 printf(" %-9.9s", "permanent");
 702                         else
 703                                 printf(" %-9.9s", "expired");
 704
 705                         switch (nbi->state) {
 706                         case ND6_LLINFO_NOSTATE:
 707                                  printf(" N");
 708                                  break;
 709 #ifdef ND6_LLINFO_WAITDELETE
 710                         case ND6_LLINFO_WAITDELETE:
 711                                  printf(" W");
 712                                  break;
 713 #endif
 714                         case ND6_LLINFO_INCOMPLETE:
 715                                  printf(" I");
 716                                  break;
 717                         case ND6_LLINFO_REACHABLE:
 718                                  printf(" R");
 719                                  break;
 720                         case ND6_LLINFO_STALE:
 721                                  printf(" S");
 722                                  break;
 723                         case ND6_LLINFO_DELAY:
 724                                  printf(" D");
 725                                  break;
 726                         case ND6_LLINFO_PROBE:
 727                                  printf(" P");
 728                                  break;
 729                         default:
 730                                  printf(" ?");
 731                                  break;
 732                         }
 733
 734                         isrouter = nbi->isrouter;
 735                         prbs = nbi->asked;
 736                 } else {
 737                         warnx("failed to get neighbor information");
 738                         printf("  ");
 739                 }
 740
 741                 /*
 742                  * other flags. R: router, P: proxy, W: ??
 743                  */
 744                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 745                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 746                             isrouter ? "R" : "",
 747                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 748                 } else {
 749                         sin = (struct sockaddr_in6 *)
 750                             (sdl->sdl_len + (char *)sdl);
 751 #if 0   /* W and P are mystery even for us */
 752                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 753                             isrouter ? "R" : "",
 754                             !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 755                             (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 756                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 757 #else
 758                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 759                             isrouter ? "R" : "",
 760                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 761 #endif
 762                 }
 763                 printf(" %s", flgbuf);
 764
 765                 if (prbs)
 766                         printf(" %d", prbs);
 767
 768                 printf("\n");
 769         }
 770         if (buf != NULL)
 771                 free(buf);
 772
 773         if (repeat) {
 774                 printf("\n");
 775                 fflush(stdout);
 776                 sleep(repeat);
 777                 goto again;
 778         }
 779 }
 780
 781 static struct in6_nbrinfo *
 782 getnbrinfo(addr, ifindex, warning)
 783         struct in6_addr *addr;
 784         int ifindex;
 785         int warning;
 786 {
 787         static struct in6_nbrinfo nbi;
 788         int s;
 789
 790         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 791                 err(1, "socket");
 792
 793         bzero(&nbi, sizeof(nbi));
 794         if_indextoname(ifindex, nbi.ifname);
 795         nbi.addr = *addr;
 796         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 797                 if (warning)
 798                         warn("ioctl(SIOCGNBRINFO_IN6)");
 799                 close(s);
 800                 return(NULL);
 801         }
 802
 803         close(s);
 804         return(&nbi);
 805 }
 806
 807 static char *
 808 ether_str(sdl)
 809         struct sockaddr_dl *sdl;
 810 {
 811         static char hbuf[NI_MAXHOST];
 812         u_char *cp;
 813
 814         if (sdl->sdl_alen) {
 815                 cp = (u_char *)LLADDR(sdl);
 816                 snprintf(hbuf, sizeof(hbuf), "%x:%x:%x:%x:%x:%x",
 817                     cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 818         } else
 819                 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
 820
 821         return(hbuf);
 822 }
 823
 824 int
 825 ndp_ether_aton(a, n)
 826         char *a;
 827         u_char *n;
 828 {
 829         int i, o[6];
 830
 831         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 832             &o[3], &o[4], &o[5]);
 833         if (i != 6) {
 834                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 835                 return (1);
 836         }
 837         for (i = 0; i < 6; i++)
 838                 n[i] = o[i];
 839         return (0);
 840 }
 841
 842 void
 843 usage()
 844 {
 845         printf("usage: ndp [-nt] hostname\n");
 846         printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
 847         printf("       ndp [-nt] -A wait\n");
 848         printf("       ndp [-nt] -d hostname\n");
 849         printf("       ndp [-nt] -f filename\n");
 850         printf("       ndp [-nt] -i interface [flags...]\n");
 851 #ifdef SIOCSDEFIFACE_IN6
 852         printf("       ndp [-nt] -I [interface|delete]\n");
 853 #endif
 854         printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
 855         exit(1);
 856 }
 857
 858 int
 859 rtmsg(cmd)
 860         int cmd;
 861 {
 862         static int seq;
 863         int rlen;
 864         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 865         register char *cp = m_rtmsg.m_space;
 866         register int l;
 867
 868         errno = 0;
 869         if (cmd == RTM_DELETE)
 870                 goto doit;
 871         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 872         rtm->rtm_flags = flags;
 873         rtm->rtm_version = RTM_VERSION;
 874
 875         switch (cmd) {
 876         default:
 877                 fprintf(stderr, "ndp: internal wrong cmd\n");
 878                 exit(1);
 879         case RTM_ADD:
 880                 rtm->rtm_addrs |= RTA_GATEWAY;
 881                 if (expire_time) {
 882                         rtm->rtm_rmx.rmx_expire = expire_time;
 883                         rtm->rtm_inits = RTV_EXPIRE;
 884                 }
 885                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 886 #if 0 /* we don't support ipv6addr/128 type proxying */
 887                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 888                         rtm->rtm_flags &= ~RTF_HOST;
 889                         rtm->rtm_addrs |= RTA_NETMASK;
 890                 }
 891 #endif
 892                 /* FALLTHROUGH */
 893         case RTM_GET:
 894                 rtm->rtm_addrs |= RTA_DST;
 895         }
 896 #define NEXTADDR(w, s) \
 897         if (rtm->rtm_addrs & (w)) { \
 898                 bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);}
 899
 900         NEXTADDR(RTA_DST, sin_m);
 901         NEXTADDR(RTA_GATEWAY, sdl_m);
 902 #if 0 /* we don't support ipv6addr/128 type proxying */
 903         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 904         NEXTADDR(RTA_NETMASK, so_mask);
 905 #endif
 906
 907         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 908 doit:
 909         l = rtm->rtm_msglen;
 910         rtm->rtm_seq = ++seq;
 911         rtm->rtm_type = cmd;
 912         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 913                 if (errno != ESRCH || cmd != RTM_DELETE) {
 914                         err(1, "writing to routing socket");
 915                         /* NOTREACHED */
 916                 }
 917         }
 918         do {
 919                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 920         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 921         if (l < 0)
 922                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 923                     strerror(errno));
 924         return (0);
 925 }
 926
 927 void
 928 ifinfo(ifname, argc, argv)
 929         char *ifname;
 930         int argc;
 931         char **argv;
 932 {
 933         struct in6_ndireq nd;
 934         int i, s;
 935         u_int32_t newflags;
 936 #ifdef IPV6CTL_USETEMPADDR
 937         u_int8_t nullbuf[8];
 938 #endif
 939
 940         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 941                 err(1, "socket");
 942                 /* NOTREACHED */
 943         }
 944         bzero(&nd, sizeof(nd));
 945         strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
 946         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 947                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 948                 /* NOTREACHED */
 949         }
 950 #define ND nd.ndi
 951         newflags = ND.flags;
 952         for (i = 0; i < argc; i++) {
 953                 int clear = 0;
 954                 char *cp = argv[i];
 955
 956                 if (*cp == '-') {
 957                         clear = 1;
 958                         cp++;
 959                 }
 960
 961 #define SETFLAG(s, f) \
 962         do {\
 963                 if (strcmp(cp, (s)) == 0) {\
 964                         if (clear)\
 965                                 newflags &= ~(f);\
 966                         else\
 967                                 newflags |= (f);\
 968                 }\
 969         } while (0)
 970 /*
 971  * XXX: this macro is not 100% correct, in that it matches "nud" against
 972  *      "nudbogus".  But we just let it go since this is minor.
 973  */
 974 #define SETVALUE(f, v) \
 975         do { \
 976                 char *valptr; \
 977                 unsigned long newval; \
 978                 v = 0; /* unspecified */ \
 979                 if (strncmp(cp, f, strlen(f)) == 0) { \
 980                         valptr = strchr(cp, '='); \
 981                         if (valptr == NULL) \
 982                                 err(1, "syntax error in %s field", (f)); \
 983                         errno = 0; \
 984                         newval = strtoul(++valptr, NULL, 0); \
 985                         if (errno) \
 986                                 err(1, "syntax error in %s's value", (f)); \
 987                         v = newval; \
 988                 } \
 989         } while (0)
 990
 991                 SETFLAG("disabled", ND6_IFF_IFDISABLED);
 992                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 993 #ifdef ND6_IFF_ACCEPT_RTADV
 994                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 995 #endif
 996 #ifdef ND6_IFF_PREFER_SOURCE
 997                 SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
 998 #endif
 999                 SETVALUE("basereachable", ND.basereachable);
1000                 SETVALUE("retrans", ND.retrans);
1001                 SETVALUE("curhlim", ND.chlim);
1002
1003                 ND.flags = newflags;
1004                 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
1005                         err(1, "ioctl(SIOCSIFINFO_IN6)");
1006                         /* NOTREACHED */
1007                 }
1008 #undef SETFLAG
1009 #undef SETVALUE
1010         }
1011
1012         if (!ND.initialized) {
1013                 errx(1, "%s: not initialized yet", ifname);
1014                 /* NOTREACHED */
1015         }
1016
1017         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1018                 err(1, "ioctl(SIOCGIFINFO_IN6)");
1019                 /* NOTREACHED */
1020         }
1021         printf("linkmtu=%d", ND.linkmtu);
1022         printf(", maxmtu=%d", ND.maxmtu);
1023         printf(", curhlim=%d", ND.chlim);
1024         printf(", basereachable=%ds%dms",
1025             ND.basereachable / 1000, ND.basereachable % 1000);
1026         printf(", reachable=%ds", ND.reachable);
1027         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1028 #ifdef IPV6CTL_USETEMPADDR
1029         memset(nullbuf, 0, sizeof(nullbuf));
1030         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1031                 int j;
1032                 u_int8_t *rbuf;
1033
1034                 for (i = 0; i < 3; i++) {
1035                         switch (i) {
1036                         case 0:
1037                                 printf("\nRandom seed(0): ");
1038                                 rbuf = ND.randomseed0;
1039                                 break;
1040                         case 1:
1041                                 printf("\nRandom seed(1): ");
1042                                 rbuf = ND.randomseed1;
1043                                 break;
1044                         case 2:
1045                                 printf("\nRandom ID:      ");
1046                                 rbuf = ND.randomid;
1047                                 break;
1048                         default:
1049                                 errx(1, "impossible case for tempaddr display");
1050                         }
1051                         for (j = 0; j < 8; j++)
1052                                 printf("%02x", rbuf[j]);
1053                 }
1054         }
1055 #endif
1056         if (ND.flags) {
1057                 printf("\nFlags: ");
1058 #ifdef ND6_IFF_IFDISABLED
1059                 if ((ND.flags & ND6_IFF_IFDISABLED))
1060                         printf("disabled ");
1061 #endif
1062                 if ((ND.flags & ND6_IFF_PERFORMNUD))
1063                         printf("nud ");
1064 #ifdef ND6_IFF_ACCEPT_RTADV
1065                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1066                         printf("accept_rtadv ");
1067 #endif
1068 #ifdef ND6_IFF_PREFER_SOURCE
1069                 if ((ND.flags & ND6_IFF_PREFER_SOURCE))
1070                         printf("prefer_source ");
1071 #endif
1072         }
1073         putc('\n', stdout);
1074 #undef ND
1075
1076         close(s);
1077 }
1078
1079 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1080 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1081 #endif
1082
1083 void
1084 rtrlist()
1085 {
1086 #ifdef ICMPV6CTL_ND6_DRLIST
1087         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1088         char *buf;
1089         struct in6_defrouter *p, *ep;
1090         size_t l;
1091         struct timeval time;
1092
1093         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1094                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1095                 /*NOTREACHED*/
1096         }
1097         if (l == 0)
1098                 return;
1099         buf = malloc(l);
1100         if (!buf) {
1101                 err(1, "malloc");
1102                 /*NOTREACHED*/
1103         }
1104         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1105                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1106                 /*NOTREACHED*/
1107         }
1108
1109         ep = (struct in6_defrouter *)(buf + l);
1110         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1111                 int rtpref;
1112
1113                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1114                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1115                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1116                         strlcpy(host_buf, "?", sizeof(host_buf));
1117
1118                 printf("%s if=%s", host_buf,
1119                     if_indextoname(p->if_index, ifix_buf));
1120                 printf(", flags=%s%s",
1121                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1122                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1123                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1124                 printf(", pref=%s", rtpref_str[rtpref]);
1125
1126                 gettimeofday(&time, 0);
1127                 if (p->expire == 0)
1128                         printf(", expire=Never\n");
1129                 else
1130                         printf(", expire=%s\n",
1131                             sec2str(p->expire - time.tv_sec));
1132         }
1133         free(buf);
1134 #else
1135         struct in6_drlist dr;
1136         int s, i;
1137         struct timeval time;
1138
1139         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1140                 err(1, "socket");
1141                 /* NOTREACHED */
1142         }
1143         bzero(&dr, sizeof(dr));
1144         strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1145         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1146                 err(1, "ioctl(SIOCGDRLST_IN6)");
1147                 /* NOTREACHED */
1148         }
1149 #define DR dr.defrouter[i]
1150         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1151                 struct sockaddr_in6 sin6;
1152
1153                 bzero(&sin6, sizeof(sin6));
1154                 sin6.sin6_family = AF_INET6;
1155                 sin6.sin6_len = sizeof(sin6);
1156                 sin6.sin6_addr = DR.rtaddr;
1157                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1158                     sizeof(host_buf), NULL, 0,
1159                     (nflag ? NI_NUMERICHOST : 0));
1160
1161                 printf("%s if=%s", host_buf,
1162                     if_indextoname(DR.if_index, ifix_buf));
1163                 printf(", flags=%s%s",
1164                     DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1165                     DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1166                 gettimeofday(&time, 0);
1167                 if (DR.expire == 0)
1168                         printf(", expire=Never\n");
1169                 else
1170                         printf(", expire=%s\n",
1171                             sec2str(DR.expire - time.tv_sec));
1172         }
1173 #undef DR
1174         close(s);
1175 #endif
1176 }
1177
1178 void
1179 plist()
1180 {
1181 #ifdef ICMPV6CTL_ND6_PRLIST
1182         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1183         char *buf;
1184         struct in6_prefix *p, *ep, *n;
1185         struct sockaddr_in6 *advrtr;
1186         size_t l;
1187         struct timeval time;
1188         const int niflags = NI_NUMERICHOST;
1189         int ninflags = nflag ? NI_NUMERICHOST : 0;
1190         char namebuf[NI_MAXHOST];
1191
1192         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1193                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1194                 /*NOTREACHED*/
1195         }
1196         buf = malloc(l);
1197         if (!buf) {
1198                 err(1, "malloc");
1199                 /*NOTREACHED*/
1200         }
1201         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1202                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1203                 /*NOTREACHED*/
1204         }
1205
1206         ep = (struct in6_prefix *)(buf + l);
1207         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1208                 advrtr = (struct sockaddr_in6 *)(p + 1);
1209                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1210
1211                 if (getnameinfo((struct sockaddr *)&p->prefix,
1212                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1213                     NULL, 0, niflags) != 0)
1214                         strlcpy(namebuf, "?", sizeof(namebuf));
1215                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1216                     if_indextoname(p->if_index, ifix_buf));
1217
1218                 gettimeofday(&time, 0);
1219                 /*
1220                  * meaning of fields, especially flags, is very different
1221                  * by origin.  notify the difference to the users.
1222                  */
1223                 printf("flags=%s%s%s%s%s",
1224                     p->raflags.onlink ? "L" : "",
1225                     p->raflags.autonomous ? "A" : "",
1226                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1227                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1228 #ifdef NDPRF_HOME
1229                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1230 #else
1231                     ""
1232 #endif
1233                     );
1234                 if (p->vltime == ND6_INFINITE_LIFETIME)
1235                         printf(" vltime=infinity");
1236                 else
1237                         printf(" vltime=%lu", (unsigned long)p->vltime);
1238                 if (p->pltime == ND6_INFINITE_LIFETIME)
1239                         printf(", pltime=infinity");
1240                 else
1241                         printf(", pltime=%lu", (unsigned long)p->pltime);
1242                 if (p->expire == 0)
1243                         printf(", expire=Never");
1244                 else if (p->expire >= time.tv_sec)
1245                         printf(", expire=%s",
1246                             sec2str(p->expire - time.tv_sec));
1247                 else
1248                         printf(", expired");
1249                 printf(", ref=%d", p->refcnt);
1250                 printf("\n");
1251                 /*
1252                  * "advertising router" list is meaningful only if the prefix
1253                  * information is from RA.
1254                  */
1255                 if (p->advrtrs) {
1256                         int j;
1257                         struct sockaddr_in6 *sin6;
1258
1259                         sin6 = advrtr;
1260                         printf("  advertised by\n");
1261                         for (j = 0; j < p->advrtrs; j++) {
1262                                 struct in6_nbrinfo *nbi;
1263
1264                                 if (getnameinfo((struct sockaddr *)sin6,
1265                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1266                                     NULL, 0, ninflags) != 0)
1267                                         strlcpy(namebuf, "?", sizeof(namebuf));
1268                                 printf("    %s", namebuf);
1269
1270                                 nbi = getnbrinfo(&sin6->sin6_addr,
1271                                     p->if_index, 0);
1272                                 if (nbi) {
1273                                         switch (nbi->state) {
1274                                         case ND6_LLINFO_REACHABLE:
1275                                         case ND6_LLINFO_STALE:
1276                                         case ND6_LLINFO_DELAY:
1277                                         case ND6_LLINFO_PROBE:
1278                                                 printf(" (reachable)\n");
1279                                                 break;
1280                                         default:
1281                                                 printf(" (unreachable)\n");
1282                                         }
1283                                 } else
1284                                         printf(" (no neighbor state)\n");
1285                                 sin6++;
1286                         }
1287                 } else
1288                         printf("  No advertising router\n");
1289         }
1290         free(buf);
1291 #else
1292         struct in6_prlist pr;
1293         int s, i;
1294         struct timeval time;
1295
1296         gettimeofday(&time, 0);
1297
1298         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1299                 err(1, "socket");
1300                 /* NOTREACHED */
1301         }
1302         bzero(&pr, sizeof(pr));
1303         strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1304         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1305                 err(1, "ioctl(SIOCGPRLST_IN6)");
1306                 /* NOTREACHED */
1307         }
1308 #define PR pr.prefix[i]
1309         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1310                 struct sockaddr_in6 p6;
1311                 char namebuf[NI_MAXHOST];
1312                 int niflags;
1313
1314 #ifdef NDPRF_ONLINK
1315                 p6 = PR.prefix;
1316 #else
1317                 memset(&p6, 0, sizeof(p6));
1318                 p6.sin6_family = AF_INET6;
1319                 p6.sin6_len = sizeof(p6);
1320                 p6.sin6_addr = PR.prefix;
1321 #endif
1322
1323                 /*
1324                  * copy link index to sin6_scope_id field.
1325                  * XXX: KAME specific.
1326                  */
1327                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1328                         u_int16_t linkid;
1329
1330                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1331                             sizeof(linkid));
1332                         linkid = ntohs(linkid);
1333                         p6.sin6_scope_id = linkid;
1334                         p6.sin6_addr.s6_addr[2] = 0;
1335                         p6.sin6_addr.s6_addr[3] = 0;
1336                 }
1337
1338                 niflags = NI_NUMERICHOST;
1339                 if (getnameinfo((struct sockaddr *)&p6,
1340                     sizeof(p6), namebuf, sizeof(namebuf),
1341                     NULL, 0, niflags)) {
1342                         warnx("getnameinfo failed");
1343                         continue;
1344                 }
1345                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1346                     if_indextoname(PR.if_index, ifix_buf));
1347
1348                 gettimeofday(&time, 0);
1349                 /*
1350                  * meaning of fields, especially flags, is very different
1351                  * by origin.  notify the difference to the users.
1352                  */
1353 #if 0
1354                 printf("  %s",
1355                     PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1356 #endif
1357 #ifdef NDPRF_ONLINK
1358                 printf("flags=%s%s%s%s%s",
1359                     PR.raflags.onlink ? "L" : "",
1360                     PR.raflags.autonomous ? "A" : "",
1361                     (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1362                     (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1363 #ifdef NDPRF_HOME
1364                     (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1365 #else
1366                     ""
1367 #endif
1368                     );
1369 #else
1370                 printf("flags=%s%s",
1371                     PR.raflags.onlink ? "L" : "",
1372                     PR.raflags.autonomous ? "A" : "");
1373 #endif
1374                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1375                         printf(" vltime=infinity");
1376                 else
1377                         printf(" vltime=%lu", PR.vltime);
1378                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1379                         printf(", pltime=infinity");
1380                 else
1381                         printf(", pltime=%lu", PR.pltime);
1382                 if (PR.expire == 0)
1383                         printf(", expire=Never");
1384                 else if (PR.expire >= time.tv_sec)
1385                         printf(", expire=%s",
1386                             sec2str(PR.expire - time.tv_sec));
1387                 else
1388                         printf(", expired");
1389 #ifdef NDPRF_ONLINK
1390                 printf(", ref=%d", PR.refcnt);
1391 #endif
1392 #if 0
1393                 switch (PR.origin) {
1394                 case PR_ORIG_RA:
1395                         printf(", origin=RA");
1396                         break;
1397                 case PR_ORIG_RR:
1398                         printf(", origin=RR");
1399                         break;
1400                 case PR_ORIG_STATIC:
1401                         printf(", origin=static");
1402                         break;
1403                 case PR_ORIG_KERNEL:
1404                         printf(", origin=kernel");
1405                         break;
1406                 default:
1407                         printf(", origin=?");
1408                         break;
1409                 }
1410 #endif
1411                 printf("\n");
1412                 /*
1413                  * "advertising router" list is meaningful only if the prefix
1414                  * information is from RA.
1415                  */
1416                 if (0 &&        /* prefix origin is almost obsolted */
1417                     PR.origin != PR_ORIG_RA)
1418                         ;
1419                 else if (PR.advrtrs) {
1420                         int j;
1421                         printf("  advertised by\n");
1422                         for (j = 0; j < PR.advrtrs; j++) {
1423                                 struct sockaddr_in6 sin6;
1424                                 struct in6_nbrinfo *nbi;
1425
1426                                 bzero(&sin6, sizeof(sin6));
1427                                 sin6.sin6_family = AF_INET6;
1428                                 sin6.sin6_len = sizeof(sin6);
1429                                 sin6.sin6_addr = PR.advrtr[j];
1430                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1431                                 getnameinfo((struct sockaddr *)&sin6,
1432                                     sin6.sin6_len, host_buf,
1433                                     sizeof(host_buf), NULL, 0,
1434                                     (nflag ? NI_NUMERICHOST : 0));
1435                                 printf("    %s", host_buf);
1436
1437                                 nbi = getnbrinfo(&sin6.sin6_addr,
1438                                     PR.if_index, 0);
1439                                 if (nbi) {
1440                                         switch (nbi->state) {
1441                                         case ND6_LLINFO_REACHABLE:
1442                                         case ND6_LLINFO_STALE:
1443                                         case ND6_LLINFO_DELAY:
1444                                         case ND6_LLINFO_PROBE:
1445                                                  printf(" (reachable)\n");
1446                                                  break;
1447                                         default:
1448                                                  printf(" (unreachable)\n");
1449                                         }
1450                                 } else
1451                                         printf(" (no neighbor state)\n");
1452                         }
1453                         if (PR.advrtrs > DRLSTSIZ)
1454                                 printf("    and %d routers\n",
1455                                     PR.advrtrs - DRLSTSIZ);
1456                 } else
1457                         printf("  No advertising router\n");
1458         }
1459 #undef PR
1460         close(s);
1461 #endif
1462 }
1463
1464 void
1465 pfx_flush()
1466 {
1467         char dummyif[IFNAMSIZ+8];
1468         int s;
1469
1470         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1471                 err(1, "socket");
1472         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1473         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1474                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1475 }
1476
1477 void
1478 rtr_flush()
1479 {
1480         char dummyif[IFNAMSIZ+8];
1481         int s;
1482
1483         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1484                 err(1, "socket");
1485         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1486         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1487                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1488
1489         close(s);
1490 }
1491
1492 void
1493 harmonize_rtr()
1494 {
1495         char dummyif[IFNAMSIZ+8];
1496         int s;
1497
1498         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1499                 err(1, "socket");
1500         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1501         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1502                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1503
1504         close(s);
1505 }
1506
1507 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1508 static void
1509 setdefif(ifname)
1510         char *ifname;
1511 {
1512         struct in6_ndifreq ndifreq;
1513         unsigned int ifindex;
1514
1515         if (strcasecmp(ifname, "delete") == 0)
1516                 ifindex = 0;
1517         else {
1518                 if ((ifindex = if_nametoindex(ifname)) == 0)
1519                         err(1, "failed to resolve i/f index for %s", ifname);
1520         }
1521
1522         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1523                 err(1, "socket");
1524
1525         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1526         ndifreq.ifindex = ifindex;
1527
1528         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1529                 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1530
1531         close(s);
1532 }
1533
1534 static void
1535 getdefif()
1536 {
1537         struct in6_ndifreq ndifreq;
1538         char ifname[IFNAMSIZ+8];
1539
1540         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1541                 err(1, "socket");
1542
1543         memset(&ndifreq, 0, sizeof(ndifreq));
1544         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1545
1546         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1547                 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1548
1549         if (ndifreq.ifindex == 0)
1550                 printf("No default interface.\n");
1551         else {
1552                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1553                         err(1, "failed to resolve ifname for index %lu",
1554                             ndifreq.ifindex);
1555                 printf("ND default interface = %s\n", ifname);
1556         }
1557
1558         close(s);
1559 }
1560 #endif
1561
1562 static char *
1563 sec2str(total)
1564         time_t total;
1565 {
1566         static char result[256];
1567         int days, hours, mins, secs;
1568         int first = 1;
1569         char *p = result;
1570         char *ep = &result[sizeof(result)];
1571         int n;
1572
1573         days = total / 3600 / 24;
1574         hours = (total / 3600) % 24;
1575         mins = (total / 60) % 60;
1576         secs = total % 60;
1577
1578         if (days) {
1579                 first = 0;
1580                 n = snprintf(p, ep - p, "%dd", days);
1581                 if (n < 0 || n >= ep - p)
1582                         return "?";
1583                 p += n;
1584         }
1585         if (!first || hours) {
1586                 first = 0;
1587                 n = snprintf(p, ep - p, "%dh", hours);
1588                 if (n < 0 || n >= ep - p)
1589                         return "?";
1590                 p += n;
1591         }
1592         if (!first || mins) {
1593                 first = 0;
1594                 n = snprintf(p, ep - p, "%dm", mins);
1595                 if (n < 0 || n >= ep - p)
1596                         return "?";
1597                 p += n;
1598         }
1599         snprintf(p, ep - p, "%ds", secs);
1600
1601         return(result);
1602 }
1603
1604 /*
1605  * Print the timestamp
1606  * from tcpdump/util.c
1607  */
1608 static void
1609 ts_print(tvp)
1610         const struct timeval *tvp;
1611 {
1612         int s;
1613
1614         /* Default */
1615         s = (tvp->tv_sec + thiszone) % 86400;
1616         (void)printf("%02d:%02d:%02d.%06u ",
1617             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1618 }