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 #define NEXTADDR(w, s) \
 118         if (rtm->rtm_addrs & (w)) { \
 119                 bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);}
 120
 121
 122 static pid_t pid;
 123 static int nflag;
 124 static int tflag;
 125 static int32_t thiszone;        /* time difference with gmt */
 126 static int s = -1;
 127 static int repeat = 0;
 128
 129 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 130 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 131 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 132
 133 int main(int, char **);
 134 int file(char *);
 135 void getsocket(void);
 136 int set(int, char **);
 137 void get(char *);
 138 int delete(char *);
 139 void dump(struct in6_addr *, int);
 140 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
 141 static char *ether_str(struct sockaddr_dl *);
 142 int ndp_ether_aton(char *, u_char *);
 143 void usage(void);
 144 int rtmsg(int);
 145 void ifinfo(char *, int, char **);
 146 void rtrlist(void);
 147 void plist(void);
 148 void pfx_flush(void);
 149 void rtr_flush(void);
 150 void harmonize_rtr(void);
 151 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 152 static void getdefif(void);
 153 static void setdefif(char *);
 154 #endif
 155 static char *sec2str(time_t);
 156 static void ts_print(const struct timeval *);
 157
 158 #ifdef ICMPV6CTL_ND6_DRLIST
 159 static char *rtpref_str[] = {
 160         "medium",               /* 00 */
 161         "high",                 /* 01 */
 162         "rsv",                  /* 10 */
 163         "low"                   /* 11 */
 164 };
 165 #endif
 166
 167 int mode = 0;
 168 char *arg = NULL;
 169
 170 int
 171 main(argc, argv)
 172         int argc;
 173         char **argv;
 174 {
 175         int ch;
 176
 177         pid = getpid();
 178         thiszone = gmt2local(0);
 179         while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
 180                 switch (ch) {
 181                 case 'a':
 182                 case 'c':
 183                 case 'p':
 184                 case 'r':
 185                 case 'H':
 186                 case 'P':
 187                 case 'R':
 188                 case 's':
 189                 case 'I':
 190                         if (mode) {
 191                                 usage();
 192                                 /*NOTREACHED*/
 193                         }
 194                         mode = ch;
 195                         arg = NULL;
 196                         break;
 197                 case 'd':
 198                 case 'f':
 199                 case 'i' :
 200                         if (mode) {
 201                                 usage();
 202                                 /*NOTREACHED*/
 203                         }
 204                         mode = ch;
 205                         arg = optarg;
 206                         break;
 207                 case 'n':
 208                         nflag = 1;
 209                         break;
 210                 case 't':
 211                         tflag = 1;
 212                         break;
 213                 case 'A':
 214                         if (mode) {
 215                                 usage();
 216                                 /*NOTREACHED*/
 217                         }
 218                         mode = 'a';
 219                         repeat = atoi(optarg);
 220                         if (repeat < 0) {
 221                                 usage();
 222                                 /*NOTREACHED*/
 223                         }
 224                         break;
 225                 default:
 226                         usage();
 227                 }
 228
 229         argc -= optind;
 230         argv += optind;
 231
 232         switch (mode) {
 233         case 'a':
 234         case 'c':
 235                 if (argc != 0) {
 236                         usage();
 237                         /*NOTREACHED*/
 238                 }
 239                 dump(0, mode == 'c');
 240                 break;
 241         case 'd':
 242                 if (argc != 0) {
 243                         usage();
 244                         /*NOTREACHED*/
 245                 }
 246                 delete(arg);
 247                 break;
 248         case 'I':
 249 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 250                 if (argc > 1) {
 251                         usage();
 252                         /*NOTREACHED*/
 253                 } else if (argc == 1) {
 254                         if (strcmp(*argv, "delete") == 0 ||
 255                             if_nametoindex(*argv))
 256                                 setdefif(*argv);
 257                         else
 258                                 errx(1, "invalid interface %s", *argv);
 259                 }
 260                 getdefif(); /* always call it to print the result */
 261                 break;
 262 #else
 263                 errx(1, "not supported yet");
 264                 /*NOTREACHED*/
 265 #endif
 266         case 'p':
 267                 if (argc != 0) {
 268                         usage();
 269                         /*NOTREACHED*/
 270                 }
 271                 plist();
 272                 break;
 273         case 'i':
 274                 ifinfo(arg, argc, argv);
 275                 break;
 276         case 'r':
 277                 if (argc != 0) {
 278                         usage();
 279                         /*NOTREACHED*/
 280                 }
 281                 rtrlist();
 282                 break;
 283         case 's':
 284                 if (argc < 2 || argc > 4)
 285                         usage();
 286                 exit(set(argc, argv) ? 1 : 0);
 287         case 'H':
 288                 if (argc != 0) {
 289                         usage();
 290                         /*NOTREACHED*/
 291                 }
 292                 harmonize_rtr();
 293                 break;
 294         case 'P':
 295                 if (argc != 0) {
 296                         usage();
 297                         /*NOTREACHED*/
 298                 }
 299                 pfx_flush();
 300                 break;
 301         case 'R':
 302                 if (argc != 0) {
 303                         usage();
 304                         /*NOTREACHED*/
 305                 }
 306                 rtr_flush();
 307                 break;
 308         case 0:
 309                 if (argc != 1) {
 310                         usage();
 311                         /*NOTREACHED*/
 312                 }
 313                 get(argv[0]);
 314                 break;
 315         }
 316         exit(0);
 317 }
 318
 319 /*
 320  * Process a file to set standard ndp entries
 321  */
 322 int
 323 file(name)
 324         char *name;
 325 {
 326         FILE *fp;
 327         int i, retval;
 328         char line[100], arg[5][50], *args[5];
 329
 330         if ((fp = fopen(name, "r")) == NULL) {
 331                 fprintf(stderr, "ndp: cannot open %s\n", name);
 332                 exit(1);
 333         }
 334         args[0] = &arg[0][0];
 335         args[1] = &arg[1][0];
 336         args[2] = &arg[2][0];
 337         args[3] = &arg[3][0];
 338         args[4] = &arg[4][0];
 339         retval = 0;
 340         while (fgets(line, sizeof(line), fp) != NULL) {
 341                 i = sscanf(line, "%49s %49s %49s %49s %49s",
 342                     arg[0], arg[1], arg[2], arg[3], arg[4]);
 343                 if (i < 2) {
 344                         fprintf(stderr, "ndp: bad line: %s\n", line);
 345                         retval = 1;
 346                         continue;
 347                 }
 348                 if (set(i, args))
 349                         retval = 1;
 350         }
 351         fclose(fp);
 352         return (retval);
 353 }
 354
 355 void
 356 getsocket()
 357 {
 358         if (s < 0) {
 359                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 360                 if (s < 0) {
 361                         err(1, "socket");
 362                         /* NOTREACHED */
 363                 }
 364         }
 365 }
 366
 367 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 368 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 369 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 370 time_t  expire_time;
 371 int     flags, found_entry;
 372 struct  {
 373         struct  rt_msghdr m_rtm;
 374         char    m_space[512];
 375 }       m_rtmsg;
 376
 377 /*
 378  * Set an individual neighbor cache entry
 379  */
 380 int
 381 set(argc, argv)
 382         int argc;
 383         char **argv;
 384 {
 385         register struct sockaddr_in6 *sin = &sin_m;
 386         register struct sockaddr_dl *sdl;
 387         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 388         struct addrinfo hints, *res;
 389         int gai_error;
 390         u_char *ea;
 391         char *host = argv[0], *eaddr = argv[1];
 392
 393         getsocket();
 394         argc -= 2;
 395         argv += 2;
 396         sdl_m = blank_sdl;
 397         sin_m = blank_sin;
 398
 399         bzero(&hints, sizeof(hints));
 400         hints.ai_family = AF_INET6;
 401         gai_error = getaddrinfo(host, NULL, &hints, &res);
 402         if (gai_error) {
 403                 fprintf(stderr, "ndp: %s: %s\n", host,
 404                         gai_strerror(gai_error));
 405                 return 1;
 406         }
 407         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 408         sin->sin6_scope_id =
 409             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 410         ea = (u_char *)LLADDR(&sdl_m);
 411         if (ndp_ether_aton(eaddr, ea) == 0)
 412                 sdl_m.sdl_alen = 6;
 413         flags = expire_time = 0;
 414         while (argc-- > 0) {
 415                 if (strncmp(argv[0], "temp", 4) == 0) {
 416                         struct timeval now;
 417
 418                         gettimeofday(&now, 0);
 419                         expire_time = now.tv_sec + 20 * 60;
 420                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 421                         flags |= RTF_ANNOUNCE;
 422                 argv++;
 423         }
 424         if (rtmsg(RTM_GET) < 0) {
 425                 errx(1, "RTM_GET(%s) failed", host);
 426                 /* NOTREACHED */
 427         }
 428         sin = (struct sockaddr_in6 *)(rtm + 1);
 429         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 430         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 431                 if (sdl->sdl_family == AF_LINK &&
 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                         case IFT_L2VLAN: case IFT_BRIDGE:
 437                                 goto overwrite;
 438                         }
 439                 }
 440                 fprintf(stderr, "set: cannot configure a new entry\n");
 441                 return 1;
 442         }
 443
 444 overwrite:
 445         if (sdl->sdl_family != AF_LINK) {
 446                 printf("cannot intuit interface index and type for %s\n", host);
 447                 return (1);
 448         }
 449         sdl_m.sdl_type = sdl->sdl_type;
 450         sdl_m.sdl_index = sdl->sdl_index;
 451         return (rtmsg(RTM_ADD));
 452 }
 453
 454 /*
 455  * Display an individual neighbor cache entry
 456  */
 457 void
 458 get(host)
 459         char *host;
 460 {
 461         struct sockaddr_in6 *sin = &sin_m;
 462         struct addrinfo hints, *res;
 463         int gai_error;
 464
 465         sin_m = blank_sin;
 466         bzero(&hints, sizeof(hints));
 467         hints.ai_family = AF_INET6;
 468         gai_error = getaddrinfo(host, NULL, &hints, &res);
 469         if (gai_error) {
 470                 fprintf(stderr, "ndp: %s: %s\n", host,
 471                     gai_strerror(gai_error));
 472                 return;
 473         }
 474         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 475         dump(&sin->sin6_addr, 0);
 476         if (found_entry == 0) {
 477                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 478                     sizeof(host_buf), NULL ,0,
 479                     (nflag ? NI_NUMERICHOST : 0));
 480                 printf("%s (%s) -- no entry\n", host, host_buf);
 481                 exit(1);
 482         }
 483 }
 484
 485 /*
 486  * Delete a neighbor cache entry
 487  */
 488 int
 489 delete(host)
 490         char *host;
 491 {
 492         struct sockaddr_in6 *sin = &sin_m;
 493         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 494         register char *cp = m_rtmsg.m_space;
 495         struct sockaddr_dl *sdl;
 496         struct addrinfo hints, *res;
 497         int gai_error;
 498
 499         getsocket();
 500         sin_m = blank_sin;
 501
 502         bzero(&hints, sizeof(hints));
 503         hints.ai_family = AF_INET6;
 504         gai_error = getaddrinfo(host, NULL, &hints, &res);
 505         if (gai_error) {
 506                 fprintf(stderr, "ndp: %s: %s\n", host,
 507                     gai_strerror(gai_error));
 508                 return 1;
 509         }
 510         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 511         sin->sin6_scope_id =
 512             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 513         if (rtmsg(RTM_GET) < 0) {
 514                 errx(1, "RTM_GET(%s) failed", host);
 515                 /* NOTREACHED */
 516         }
 517         sin = (struct sockaddr_in6 *)(rtm + 1);
 518         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 519         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 520                 if (sdl->sdl_family == AF_LINK &&
 521                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 522                         goto delete;
 523                 }
 524                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 525                 return 1;
 526         }
 527
 528 delete:
 529         if (sdl->sdl_family != AF_LINK) {
 530                 printf("cannot locate %s\n", host);
 531                 return (1);
 532         }
 533         /*
 534          * need to reinit the field because it has rt_key
 535          * but we want the actual address
 536          */
 537         NEXTADDR(RTA_DST, sin_m);
 538         rtm->rtm_flags |= RTF_LLDATA;
 539         if (rtmsg(RTM_DELETE) == 0) {
 540                 getnameinfo((struct sockaddr *)sin,
 541                     sin->sin6_len, host_buf,
 542                     sizeof(host_buf), NULL, 0,
 543                     (nflag ? NI_NUMERICHOST : 0));
 544                 printf("%s (%s) deleted\n", host, host_buf);
 545         }
 546
 547         return 0;
 548 }
 549
 550 #define W_ADDR  36
 551 #define W_LL    17
 552 #define W_IF    6
 553
 554 /*
 555  * Dump the entire neighbor cache
 556  */
 557 void
 558 dump(addr, cflag)
 559         struct in6_addr *addr;
 560         int cflag;
 561 {
 562         int mib[6];
 563         size_t needed;
 564         char *lim, *buf, *next;
 565         struct rt_msghdr *rtm;
 566         struct sockaddr_in6 *sin;
 567         struct sockaddr_dl *sdl;
 568         extern int h_errno;
 569         struct in6_nbrinfo *nbi;
 570         struct timeval now;
 571         int addrwidth;
 572         int llwidth;
 573         int ifwidth;
 574         char flgbuf[8];
 575         char *ifname;
 576
 577         /* Print header */
 578         if (!tflag && !cflag)
 579                 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 580                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 581                     W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 582
 583 again:;
 584         mib[0] = CTL_NET;
 585         mib[1] = PF_ROUTE;
 586         mib[2] = 0;
 587         mib[3] = AF_INET6;
 588         mib[4] = NET_RT_FLAGS;
 589 #ifdef RTF_LLINFO
 590         mib[5] = RTF_LLINFO;
 591 #else
 592         mib[5] = 0;
 593 #endif
 594         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 595                 err(1, "sysctl(PF_ROUTE estimate)");
 596         if (needed > 0) {
 597                 if ((buf = malloc(needed)) == NULL)
 598                         err(1, "malloc");
 599                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 600                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 601                 lim = buf + needed;
 602         } else
 603                 buf = lim = NULL;
 604
 605         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 606                 int isrouter = 0, prbs = 0;
 607
 608                 rtm = (struct rt_msghdr *)next;
 609                 sin = (struct sockaddr_in6 *)(rtm + 1);
 610                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 611
 612                 /*
 613                  * Some OSes can produce a route that has the LINK flag but
 614                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 615                  * and BSD/OS, where xx is not the interface identifier on
 616                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 617                  * so we skip them.
 618                  * XXX: such routes should have the GATEWAY flag, not the
 619                  * LINK flag.  However, there is rotten routing software
 620                  * that advertises all routes that have the GATEWAY flag.
 621                  * Thus, KAME kernel intentionally does not set the LINK flag.
 622                  * What is to be fixed is not ndp, but such routing software
 623                  * (and the kernel workaround)...
 624                  */
 625                 if (sdl->sdl_family != AF_LINK)
 626                         continue;
 627
 628                 if (!(rtm->rtm_flags & RTF_HOST))
 629                         continue;
 630
 631                 if (addr) {
 632                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 633                                 continue;
 634                         found_entry = 1;
 635                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 636                         continue;
 637                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 638                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 639                         /* XXX: should scope id be filled in the kernel? */
 640                         if (sin->sin6_scope_id == 0)
 641                                 sin->sin6_scope_id = sdl->sdl_index;
 642                 }
 643                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 644                     sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
 645                 if (cflag) {
 646 #ifdef RTF_WASCLONED
 647                         if (rtm->rtm_flags & RTF_WASCLONED)
 648                                 delete(host_buf);
 649 #elif defined(RTF_CLONED)
 650                         if (rtm->rtm_flags & RTF_CLONED)
 651                                 delete(host_buf);
 652 #else
 653                         delete(host_buf);
 654 #endif
 655                         continue;
 656                 }
 657                 gettimeofday(&now, 0);
 658                 if (tflag)
 659                         ts_print(&now);
 660
 661                 addrwidth = strlen(host_buf);
 662                 if (addrwidth < W_ADDR)
 663                         addrwidth = W_ADDR;
 664                 llwidth = strlen(ether_str(sdl));
 665                 if (W_ADDR + W_LL - addrwidth > llwidth)
 666                         llwidth = W_ADDR + W_LL - addrwidth;
 667                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 668                 if (!ifname)
 669                         ifname = "?";
 670                 ifwidth = strlen(ifname);
 671                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 672                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 673
 674                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 675                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 676
 677                 /* Print neighbor discovery specific informations */
 678                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 679                 if (nbi) {
 680                         if (nbi->expire > now.tv_sec) {
 681                                 printf(" %-9.9s",
 682                                     sec2str(nbi->expire - now.tv_sec));
 683                         } else if (nbi->expire == 0)
 684                                 printf(" %-9.9s", "permanent");
 685                         else
 686                                 printf(" %-9.9s", "expired");
 687
 688                         switch (nbi->state) {
 689                         case ND6_LLINFO_NOSTATE:
 690                                  printf(" N");
 691                                  break;
 692 #ifdef ND6_LLINFO_WAITDELETE
 693                         case ND6_LLINFO_WAITDELETE:
 694                                  printf(" W");
 695                                  break;
 696 #endif
 697                         case ND6_LLINFO_INCOMPLETE:
 698                                  printf(" I");
 699                                  break;
 700                         case ND6_LLINFO_REACHABLE:
 701                                  printf(" R");
 702                                  break;
 703                         case ND6_LLINFO_STALE:
 704                                  printf(" S");
 705                                  break;
 706                         case ND6_LLINFO_DELAY:
 707                                  printf(" D");
 708                                  break;
 709                         case ND6_LLINFO_PROBE:
 710                                  printf(" P");
 711                                  break;
 712                         default:
 713                                  printf(" ?");
 714                                  break;
 715                         }
 716
 717                         isrouter = nbi->isrouter;
 718                         prbs = nbi->asked;
 719                 } else {
 720                         warnx("failed to get neighbor information");
 721                         printf("  ");
 722                 }
 723
 724                 /*
 725                  * other flags. R: router, P: proxy, W: ??
 726                  */
 727                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 728                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 729                             isrouter ? "R" : "",
 730                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 731                 } else {
 732                         sin = (struct sockaddr_in6 *)
 733                             (sdl->sdl_len + (char *)sdl);
 734 #if 0   /* W and P are mystery even for us */
 735                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 736                             isrouter ? "R" : "",
 737                             !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 738                             (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 739                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 740 #else
 741                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 742                             isrouter ? "R" : "",
 743                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 744 #endif
 745                 }
 746                 printf(" %s", flgbuf);
 747
 748                 if (prbs)
 749                         printf(" %d", prbs);
 750
 751                 printf("\n");
 752         }
 753         if (buf != NULL)
 754                 free(buf);
 755
 756         if (repeat) {
 757                 printf("\n");
 758                 fflush(stdout);
 759                 sleep(repeat);
 760                 goto again;
 761         }
 762 }
 763
 764 static struct in6_nbrinfo *
 765 getnbrinfo(addr, ifindex, warning)
 766         struct in6_addr *addr;
 767         int ifindex;
 768         int warning;
 769 {
 770         static struct in6_nbrinfo nbi;
 771         int s;
 772
 773         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 774                 err(1, "socket");
 775
 776         bzero(&nbi, sizeof(nbi));
 777         if_indextoname(ifindex, nbi.ifname);
 778         nbi.addr = *addr;
 779         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 780                 if (warning)
 781                         warn("ioctl(SIOCGNBRINFO_IN6)");
 782                 close(s);
 783                 return(NULL);
 784         }
 785
 786         close(s);
 787         return(&nbi);
 788 }
 789
 790 static char *
 791 ether_str(struct sockaddr_dl *sdl)
 792 {
 793         static char hbuf[NI_MAXHOST];
 794         char *cp;
 795
 796         if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 797                 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
 798                     sizeof(hbuf));
 799         } else if (sdl->sdl_alen) {
 800                 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
 801                 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
 802         } else
 803                 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
 804
 805         return(hbuf);
 806 }
 807
 808 int
 809 ndp_ether_aton(a, n)
 810         char *a;
 811         u_char *n;
 812 {
 813         int i, o[6];
 814
 815         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 816             &o[3], &o[4], &o[5]);
 817         if (i != 6) {
 818                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 819                 return (1);
 820         }
 821         for (i = 0; i < 6; i++)
 822                 n[i] = o[i];
 823         return (0);
 824 }
 825
 826 void
 827 usage()
 828 {
 829         printf("usage: ndp [-nt] hostname\n");
 830         printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
 831         printf("       ndp [-nt] -A wait\n");
 832         printf("       ndp [-nt] -d hostname\n");
 833         printf("       ndp [-nt] -f filename\n");
 834         printf("       ndp [-nt] -i interface [flags...]\n");
 835 #ifdef SIOCSDEFIFACE_IN6
 836         printf("       ndp [-nt] -I [interface|delete]\n");
 837 #endif
 838         printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
 839         exit(1);
 840 }
 841
 842 int
 843 rtmsg(cmd)
 844         int cmd;
 845 {
 846         static int seq;
 847         int rlen;
 848         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 849         register char *cp = m_rtmsg.m_space;
 850         register int l;
 851
 852         errno = 0;
 853         if (cmd == RTM_DELETE)
 854                 goto doit;
 855         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 856         rtm->rtm_flags = flags;
 857         rtm->rtm_version = RTM_VERSION;
 858
 859         switch (cmd) {
 860         default:
 861                 fprintf(stderr, "ndp: internal wrong cmd\n");
 862                 exit(1);
 863         case RTM_ADD:
 864                 rtm->rtm_addrs |= RTA_GATEWAY;
 865                 if (expire_time) {
 866                         rtm->rtm_rmx.rmx_expire = expire_time;
 867                         rtm->rtm_inits = RTV_EXPIRE;
 868                 }
 869                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
 870 #if 0 /* we don't support ipv6addr/128 type proxying */
 871                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 872                         rtm->rtm_flags &= ~RTF_HOST;
 873                         rtm->rtm_addrs |= RTA_NETMASK;
 874                 }
 875 #endif
 876                 /* FALLTHROUGH */
 877         case RTM_GET:
 878                 rtm->rtm_addrs |= RTA_DST;
 879         }
 880
 881         NEXTADDR(RTA_DST, sin_m);
 882         NEXTADDR(RTA_GATEWAY, sdl_m);
 883 #if 0 /* we don't support ipv6addr/128 type proxying */
 884         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 885         NEXTADDR(RTA_NETMASK, so_mask);
 886 #endif
 887
 888         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 889 doit:
 890         l = rtm->rtm_msglen;
 891         rtm->rtm_seq = ++seq;
 892         rtm->rtm_type = cmd;
 893         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 894                 if (errno != ESRCH || cmd != RTM_DELETE) {
 895                         err(1, "writing to routing socket");
 896                         /* NOTREACHED */
 897                 }
 898         }
 899         do {
 900                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 901         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 902         if (l < 0)
 903                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 904                     strerror(errno));
 905         return (0);
 906 }
 907
 908 void
 909 ifinfo(ifname, argc, argv)
 910         char *ifname;
 911         int argc;
 912         char **argv;
 913 {
 914         struct in6_ndireq nd;
 915         int i, s;
 916         u_int32_t newflags;
 917 #ifdef IPV6CTL_USETEMPADDR
 918         u_int8_t nullbuf[8];
 919 #endif
 920
 921         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 922                 err(1, "socket");
 923                 /* NOTREACHED */
 924         }
 925         bzero(&nd, sizeof(nd));
 926         strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
 927         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 928                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 929                 /* NOTREACHED */
 930         }
 931 #define ND nd.ndi
 932         newflags = ND.flags;
 933         for (i = 0; i < argc; i++) {
 934                 int clear = 0;
 935                 char *cp = argv[i];
 936
 937                 if (*cp == '-') {
 938                         clear = 1;
 939                         cp++;
 940                 }
 941
 942 #define SETFLAG(s, f) \
 943         do {\
 944                 if (strcmp(cp, (s)) == 0) {\
 945                         if (clear)\
 946                                 newflags &= ~(f);\
 947                         else\
 948                                 newflags |= (f);\
 949                 }\
 950         } while (0)
 951 /*
 952  * XXX: this macro is not 100% correct, in that it matches "nud" against
 953  *      "nudbogus".  But we just let it go since this is minor.
 954  */
 955 #define SETVALUE(f, v) \
 956         do { \
 957                 char *valptr; \
 958                 unsigned long newval; \
 959                 v = 0; /* unspecified */ \
 960                 if (strncmp(cp, f, strlen(f)) == 0) { \
 961                         valptr = strchr(cp, '='); \
 962                         if (valptr == NULL) \
 963                                 err(1, "syntax error in %s field", (f)); \
 964                         errno = 0; \
 965                         newval = strtoul(++valptr, NULL, 0); \
 966                         if (errno) \
 967                                 err(1, "syntax error in %s's value", (f)); \
 968                         v = newval; \
 969                 } \
 970         } while (0)
 971
 972                 SETFLAG("disabled", ND6_IFF_IFDISABLED);
 973                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 974 #ifdef ND6_IFF_ACCEPT_RTADV
 975                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 976 #endif
 977 #ifdef ND6_IFF_AUTO_LINKLOCAL
 978                 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
 979 #endif
 980 #ifdef ND6_IFF_NO_PREFER_IFACE
 981                 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
 982 #endif
 983                 SETVALUE("basereachable", ND.basereachable);
 984                 SETVALUE("retrans", ND.retrans);
 985                 SETVALUE("curhlim", ND.chlim);
 986
 987                 ND.flags = newflags;
 988                 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
 989                         err(1, "ioctl(SIOCSIFINFO_IN6)");
 990                         /* NOTREACHED */
 991                 }
 992 #undef SETFLAG
 993 #undef SETVALUE
 994         }
 995
 996         if (!ND.initialized) {
 997                 errx(1, "%s: not initialized yet", ifname);
 998                 /* NOTREACHED */
 999         }
1000
1001         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1002                 err(1, "ioctl(SIOCGIFINFO_IN6)");
1003                 /* NOTREACHED */
1004         }
1005         printf("linkmtu=%d", ND.linkmtu);
1006         printf(", maxmtu=%d", ND.maxmtu);
1007         printf(", curhlim=%d", ND.chlim);
1008         printf(", basereachable=%ds%dms",
1009             ND.basereachable / 1000, ND.basereachable % 1000);
1010         printf(", reachable=%ds", ND.reachable);
1011         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1012 #ifdef IPV6CTL_USETEMPADDR
1013         memset(nullbuf, 0, sizeof(nullbuf));
1014         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1015                 int j;
1016                 u_int8_t *rbuf;
1017
1018                 for (i = 0; i < 3; i++) {
1019                         switch (i) {
1020                         case 0:
1021                                 printf("\nRandom seed(0): ");
1022                                 rbuf = ND.randomseed0;
1023                                 break;
1024                         case 1:
1025                                 printf("\nRandom seed(1): ");
1026                                 rbuf = ND.randomseed1;
1027                                 break;
1028                         case 2:
1029                                 printf("\nRandom ID:      ");
1030                                 rbuf = ND.randomid;
1031                                 break;
1032                         default:
1033                                 errx(1, "impossible case for tempaddr display");
1034                         }
1035                         for (j = 0; j < 8; j++)
1036                                 printf("%02x", rbuf[j]);
1037                 }
1038         }
1039 #endif
1040         if (ND.flags) {
1041                 printf("\nFlags: ");
1042 #ifdef ND6_IFF_IFDISABLED
1043                 if ((ND.flags & ND6_IFF_IFDISABLED))
1044                         printf("disabled ");
1045 #endif
1046                 if ((ND.flags & ND6_IFF_PERFORMNUD))
1047                         printf("nud ");
1048 #ifdef ND6_IFF_ACCEPT_RTADV
1049                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1050                         printf("accept_rtadv ");
1051 #endif
1052 #ifdef ND6_IFF_AUTO_LINKLOCAL
1053                 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1054                         printf("auto_linklocal ");
1055 #endif
1056 #ifdef ND6_IFF_NO_PREFER_IFACE
1057                 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1058                         printf("no_prefer_iface ");
1059 #endif
1060         }
1061         putc('\n', stdout);
1062 #undef ND
1063
1064         close(s);
1065 }
1066
1067 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1068 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1069 #endif
1070
1071 void
1072 rtrlist()
1073 {
1074 #ifdef ICMPV6CTL_ND6_DRLIST
1075         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1076         char *buf;
1077         struct in6_defrouter *p, *ep;
1078         size_t l;
1079         struct timeval now;
1080
1081         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1082                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1083                 /*NOTREACHED*/
1084         }
1085         if (l == 0)
1086                 return;
1087         buf = malloc(l);
1088         if (!buf) {
1089                 err(1, "malloc");
1090                 /*NOTREACHED*/
1091         }
1092         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1093                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1094                 /*NOTREACHED*/
1095         }
1096
1097         ep = (struct in6_defrouter *)(buf + l);
1098         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1099                 int rtpref;
1100
1101                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1102                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1103                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1104                         strlcpy(host_buf, "?", sizeof(host_buf));
1105
1106                 printf("%s if=%s", host_buf,
1107                     if_indextoname(p->if_index, ifix_buf));
1108                 printf(", flags=%s%s",
1109                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1110                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1111                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1112                 printf(", pref=%s", rtpref_str[rtpref]);
1113
1114                 gettimeofday(&now, 0);
1115                 if (p->expire == 0)
1116                         printf(", expire=Never\n");
1117                 else
1118                         printf(", expire=%s\n",
1119                             sec2str(p->expire - now.tv_sec));
1120         }
1121         free(buf);
1122 #else
1123         struct in6_drlist dr;
1124         int s, i;
1125         struct timeval now;
1126
1127         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1128                 err(1, "socket");
1129                 /* NOTREACHED */
1130         }
1131         bzero(&dr, sizeof(dr));
1132         strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1133         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1134                 err(1, "ioctl(SIOCGDRLST_IN6)");
1135                 /* NOTREACHED */
1136         }
1137 #define DR dr.defrouter[i]
1138         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1139                 struct sockaddr_in6 sin6;
1140
1141                 bzero(&sin6, sizeof(sin6));
1142                 sin6.sin6_family = AF_INET6;
1143                 sin6.sin6_len = sizeof(sin6);
1144                 sin6.sin6_addr = DR.rtaddr;
1145                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1146                     sizeof(host_buf), NULL, 0,
1147                     (nflag ? NI_NUMERICHOST : 0));
1148
1149                 printf("%s if=%s", host_buf,
1150                     if_indextoname(DR.if_index, ifix_buf));
1151                 printf(", flags=%s%s",
1152                     DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1153                     DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1154                 gettimeofday(&now, 0);
1155                 if (DR.expire == 0)
1156                         printf(", expire=Never\n");
1157                 else
1158                         printf(", expire=%s\n",
1159                             sec2str(DR.expire - now.tv_sec));
1160         }
1161 #undef DR
1162         close(s);
1163 #endif
1164 }
1165
1166 void
1167 plist()
1168 {
1169 #ifdef ICMPV6CTL_ND6_PRLIST
1170         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1171         char *buf;
1172         struct in6_prefix *p, *ep, *n;
1173         struct sockaddr_in6 *advrtr;
1174         size_t l;
1175         struct timeval now;
1176         const int niflags = NI_NUMERICHOST;
1177         int ninflags = nflag ? NI_NUMERICHOST : 0;
1178         char namebuf[NI_MAXHOST];
1179
1180         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1181                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1182                 /*NOTREACHED*/
1183         }
1184         buf = malloc(l);
1185         if (!buf) {
1186                 err(1, "malloc");
1187                 /*NOTREACHED*/
1188         }
1189         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1190                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1191                 /*NOTREACHED*/
1192         }
1193
1194         ep = (struct in6_prefix *)(buf + l);
1195         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1196                 advrtr = (struct sockaddr_in6 *)(p + 1);
1197                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1198
1199                 if (getnameinfo((struct sockaddr *)&p->prefix,
1200                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1201                     NULL, 0, niflags) != 0)
1202                         strlcpy(namebuf, "?", sizeof(namebuf));
1203                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1204                     if_indextoname(p->if_index, ifix_buf));
1205
1206                 gettimeofday(&now, 0);
1207                 /*
1208                  * meaning of fields, especially flags, is very different
1209                  * by origin.  notify the difference to the users.
1210                  */
1211                 printf("flags=%s%s%s%s%s",
1212                     p->raflags.onlink ? "L" : "",
1213                     p->raflags.autonomous ? "A" : "",
1214                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1215                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1216 #ifdef NDPRF_HOME
1217                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1218 #else
1219                     ""
1220 #endif
1221                     );
1222                 if (p->vltime == ND6_INFINITE_LIFETIME)
1223                         printf(" vltime=infinity");
1224                 else
1225                         printf(" vltime=%lu", (unsigned long)p->vltime);
1226                 if (p->pltime == ND6_INFINITE_LIFETIME)
1227                         printf(", pltime=infinity");
1228                 else
1229                         printf(", pltime=%lu", (unsigned long)p->pltime);
1230                 if (p->expire == 0)
1231                         printf(", expire=Never");
1232                 else if (p->expire >= now.tv_sec)
1233                         printf(", expire=%s",
1234                             sec2str(p->expire - now.tv_sec));
1235                 else
1236                         printf(", expired");
1237                 printf(", ref=%d", p->refcnt);
1238                 printf("\n");
1239                 /*
1240                  * "advertising router" list is meaningful only if the prefix
1241                  * information is from RA.
1242                  */
1243                 if (p->advrtrs) {
1244                         int j;
1245                         struct sockaddr_in6 *sin6;
1246
1247                         sin6 = advrtr;
1248                         printf("  advertised by\n");
1249                         for (j = 0; j < p->advrtrs; j++) {
1250                                 struct in6_nbrinfo *nbi;
1251
1252                                 if (getnameinfo((struct sockaddr *)sin6,
1253                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1254                                     NULL, 0, ninflags) != 0)
1255                                         strlcpy(namebuf, "?", sizeof(namebuf));
1256                                 printf("    %s", namebuf);
1257
1258                                 nbi = getnbrinfo(&sin6->sin6_addr,
1259                                     p->if_index, 0);
1260                                 if (nbi) {
1261                                         switch (nbi->state) {
1262                                         case ND6_LLINFO_REACHABLE:
1263                                         case ND6_LLINFO_STALE:
1264                                         case ND6_LLINFO_DELAY:
1265                                         case ND6_LLINFO_PROBE:
1266                                                 printf(" (reachable)\n");
1267                                                 break;
1268                                         default:
1269                                                 printf(" (unreachable)\n");
1270                                         }
1271                                 } else
1272                                         printf(" (no neighbor state)\n");
1273                                 sin6++;
1274                         }
1275                 } else
1276                         printf("  No advertising router\n");
1277         }
1278         free(buf);
1279 #else
1280         struct in6_prlist pr;
1281         int s, i;
1282         struct timeval now;
1283
1284         gettimeofday(&now, 0);
1285
1286         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1287                 err(1, "socket");
1288                 /* NOTREACHED */
1289         }
1290         bzero(&pr, sizeof(pr));
1291         strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1292         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1293                 err(1, "ioctl(SIOCGPRLST_IN6)");
1294                 /* NOTREACHED */
1295         }
1296 #define PR pr.prefix[i]
1297         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1298                 struct sockaddr_in6 p6;
1299                 char namebuf[NI_MAXHOST];
1300                 int niflags;
1301
1302 #ifdef NDPRF_ONLINK
1303                 p6 = PR.prefix;
1304 #else
1305                 memset(&p6, 0, sizeof(p6));
1306                 p6.sin6_family = AF_INET6;
1307                 p6.sin6_len = sizeof(p6);
1308                 p6.sin6_addr = PR.prefix;
1309 #endif
1310                 niflags = NI_NUMERICHOST;
1311                 if (getnameinfo((struct sockaddr *)&p6,
1312                     sizeof(p6), namebuf, sizeof(namebuf),
1313                     NULL, 0, niflags)) {
1314                         warnx("getnameinfo failed");
1315                         continue;
1316                 }
1317                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1318                     if_indextoname(PR.if_index, ifix_buf));
1319
1320                 gettimeofday(&now, 0);
1321                 /*
1322                  * meaning of fields, especially flags, is very different
1323                  * by origin.  notify the difference to the users.
1324                  */
1325 #if 0
1326                 printf("  %s",
1327                     PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1328 #endif
1329 #ifdef NDPRF_ONLINK
1330                 printf("flags=%s%s%s%s%s",
1331                     PR.raflags.onlink ? "L" : "",
1332                     PR.raflags.autonomous ? "A" : "",
1333                     (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1334                     (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1335 #ifdef NDPRF_HOME
1336                     (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1337 #else
1338                     ""
1339 #endif
1340                     );
1341 #else
1342                 printf("flags=%s%s",
1343                     PR.raflags.onlink ? "L" : "",
1344                     PR.raflags.autonomous ? "A" : "");
1345 #endif
1346                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1347                         printf(" vltime=infinity");
1348                 else
1349                         printf(" vltime=%lu", PR.vltime);
1350                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1351                         printf(", pltime=infinity");
1352                 else
1353                         printf(", pltime=%lu", PR.pltime);
1354                 if (PR.expire == 0)
1355                         printf(", expire=Never");
1356                 else if (PR.expire >= now.tv_sec)
1357                         printf(", expire=%s",
1358                             sec2str(PR.expire - now.tv_sec));
1359                 else
1360                         printf(", expired");
1361 #ifdef NDPRF_ONLINK
1362                 printf(", ref=%d", PR.refcnt);
1363 #endif
1364 #if 0
1365                 switch (PR.origin) {
1366                 case PR_ORIG_RA:
1367                         printf(", origin=RA");
1368                         break;
1369                 case PR_ORIG_RR:
1370                         printf(", origin=RR");
1371                         break;
1372                 case PR_ORIG_STATIC:
1373                         printf(", origin=static");
1374                         break;
1375                 case PR_ORIG_KERNEL:
1376                         printf(", origin=kernel");
1377                         break;
1378                 default:
1379                         printf(", origin=?");
1380                         break;
1381                 }
1382 #endif
1383                 printf("\n");
1384                 /*
1385                  * "advertising router" list is meaningful only if the prefix
1386                  * information is from RA.
1387                  */
1388                 if (0 &&        /* prefix origin is almost obsolted */
1389                     PR.origin != PR_ORIG_RA)
1390                         ;
1391                 else if (PR.advrtrs) {
1392                         int j;
1393                         printf("  advertised by\n");
1394                         for (j = 0; j < PR.advrtrs; j++) {
1395                                 struct sockaddr_in6 sin6;
1396                                 struct in6_nbrinfo *nbi;
1397
1398                                 bzero(&sin6, sizeof(sin6));
1399                                 sin6.sin6_family = AF_INET6;
1400                                 sin6.sin6_len = sizeof(sin6);
1401                                 sin6.sin6_addr = PR.advrtr[j];
1402                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1403                                 getnameinfo((struct sockaddr *)&sin6,
1404                                     sin6.sin6_len, host_buf,
1405                                     sizeof(host_buf), NULL, 0,
1406                                     (nflag ? NI_NUMERICHOST : 0));
1407                                 printf("    %s", host_buf);
1408
1409                                 nbi = getnbrinfo(&sin6.sin6_addr,
1410                                     PR.if_index, 0);
1411                                 if (nbi) {
1412                                         switch (nbi->state) {
1413                                         case ND6_LLINFO_REACHABLE:
1414                                         case ND6_LLINFO_STALE:
1415                                         case ND6_LLINFO_DELAY:
1416                                         case ND6_LLINFO_PROBE:
1417                                                  printf(" (reachable)\n");
1418                                                  break;
1419                                         default:
1420                                                  printf(" (unreachable)\n");
1421                                         }
1422                                 } else
1423                                         printf(" (no neighbor state)\n");
1424                         }
1425                         if (PR.advrtrs > DRLSTSIZ)
1426                                 printf("    and %d routers\n",
1427                                     PR.advrtrs - DRLSTSIZ);
1428                 } else
1429                         printf("  No advertising router\n");
1430         }
1431 #undef PR
1432         close(s);
1433 #endif
1434 }
1435
1436 void
1437 pfx_flush()
1438 {
1439         char dummyif[IFNAMSIZ+8];
1440         int s;
1441
1442         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1443                 err(1, "socket");
1444         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1445         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1446                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1447 }
1448
1449 void
1450 rtr_flush()
1451 {
1452         char dummyif[IFNAMSIZ+8];
1453         int s;
1454
1455         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1456                 err(1, "socket");
1457         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1458         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1459                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1460
1461         close(s);
1462 }
1463
1464 void
1465 harmonize_rtr()
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, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1474                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1475
1476         close(s);
1477 }
1478
1479 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1480 static void
1481 setdefif(ifname)
1482         char *ifname;
1483 {
1484         struct in6_ndifreq ndifreq;
1485         unsigned int ifindex;
1486
1487         if (strcasecmp(ifname, "delete") == 0)
1488                 ifindex = 0;
1489         else {
1490                 if ((ifindex = if_nametoindex(ifname)) == 0)
1491                         err(1, "failed to resolve i/f index for %s", ifname);
1492         }
1493
1494         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1495                 err(1, "socket");
1496
1497         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1498         ndifreq.ifindex = ifindex;
1499
1500         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1501                 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1502
1503         close(s);
1504 }
1505
1506 static void
1507 getdefif()
1508 {
1509         struct in6_ndifreq ndifreq;
1510         char ifname[IFNAMSIZ+8];
1511
1512         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1513                 err(1, "socket");
1514
1515         memset(&ndifreq, 0, sizeof(ndifreq));
1516         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1517
1518         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1519                 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1520
1521         if (ndifreq.ifindex == 0)
1522                 printf("No default interface.\n");
1523         else {
1524                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1525                         err(1, "failed to resolve ifname for index %lu",
1526                             ndifreq.ifindex);
1527                 printf("ND default interface = %s\n", ifname);
1528         }
1529
1530         close(s);
1531 }
1532 #endif
1533
1534 static char *
1535 sec2str(total)
1536         time_t total;
1537 {
1538         static char result[256];
1539         int days, hours, mins, secs;
1540         int first = 1;
1541         char *p = result;
1542         char *ep = &result[sizeof(result)];
1543         int n;
1544
1545         days = total / 3600 / 24;
1546         hours = (total / 3600) % 24;
1547         mins = (total / 60) % 60;
1548         secs = total % 60;
1549
1550         if (days) {
1551                 first = 0;
1552                 n = snprintf(p, ep - p, "%dd", days);
1553                 if (n < 0 || n >= ep - p)
1554                         return "?";
1555                 p += n;
1556         }
1557         if (!first || hours) {
1558                 first = 0;
1559                 n = snprintf(p, ep - p, "%dh", hours);
1560                 if (n < 0 || n >= ep - p)
1561                         return "?";
1562                 p += n;
1563         }
1564         if (!first || mins) {
1565                 first = 0;
1566                 n = snprintf(p, ep - p, "%dm", mins);
1567                 if (n < 0 || n >= ep - p)
1568                         return "?";
1569                 p += n;
1570         }
1571         snprintf(p, ep - p, "%ds", secs);
1572
1573         return(result);
1574 }
1575
1576 /*
1577  * Print the timestamp
1578  * from tcpdump/util.c
1579  */
1580 static void
1581 ts_print(tvp)
1582         const struct timeval *tvp;
1583 {
1584         int s;
1585
1586         /* Default */
1587         s = (tvp->tv_sec + thiszone) % 86400;
1588         (void)printf("%02d:%02d:%02d.%06u ",
1589             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1590 }
1591
1592 #undef NEXTADDR