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 char *ether_str(struct sockaddr_dl *);
 157 static void ts_print(const struct timeval *);
 158
 159 #ifdef ICMPV6CTL_ND6_DRLIST
 160 static char *rtpref_str[] = {
 161         "medium",               /* 00 */
 162         "high",                 /* 01 */
 163         "rsv",                  /* 10 */
 164         "low"                   /* 11 */
 165 };
 166 #endif
 167
 168 int mode = 0;
 169 char *arg = NULL;
 170
 171 int
 172 main(argc, argv)
 173         int argc;
 174         char **argv;
 175 {
 176         int ch;
 177
 178         pid = getpid();
 179         thiszone = gmt2local(0);
 180         while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
 181                 switch (ch) {
 182                 case 'a':
 183                 case 'c':
 184                 case 'p':
 185                 case 'r':
 186                 case 'H':
 187                 case 'P':
 188                 case 'R':
 189                 case 's':
 190                 case 'I':
 191                         if (mode) {
 192                                 usage();
 193                                 /*NOTREACHED*/
 194                         }
 195                         mode = ch;
 196                         arg = NULL;
 197                         break;
 198                 case 'd':
 199                 case 'f':
 200                 case 'i' :
 201                         if (mode) {
 202                                 usage();
 203                                 /*NOTREACHED*/
 204                         }
 205                         mode = ch;
 206                         arg = optarg;
 207                         break;
 208                 case 'n':
 209                         nflag = 1;
 210                         break;
 211                 case 't':
 212                         tflag = 1;
 213                         break;
 214                 case 'A':
 215                         if (mode) {
 216                                 usage();
 217                                 /*NOTREACHED*/
 218                         }
 219                         mode = 'a';
 220                         repeat = atoi(optarg);
 221                         if (repeat < 0) {
 222                                 usage();
 223                                 /*NOTREACHED*/
 224                         }
 225                         break;
 226                 default:
 227                         usage();
 228                 }
 229
 230         argc -= optind;
 231         argv += optind;
 232
 233         switch (mode) {
 234         case 'a':
 235         case 'c':
 236                 if (argc != 0) {
 237                         usage();
 238                         /*NOTREACHED*/
 239                 }
 240                 dump(0, mode == 'c');
 241                 break;
 242         case 'd':
 243                 if (argc != 0) {
 244                         usage();
 245                         /*NOTREACHED*/
 246                 }
 247                 delete(arg);
 248                 break;
 249         case 'I':
 250 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 251                 if (argc > 1) {
 252                         usage();
 253                         /*NOTREACHED*/
 254                 } else if (argc == 1) {
 255                         if (strcmp(*argv, "delete") == 0 ||
 256                             if_nametoindex(*argv))
 257                                 setdefif(*argv);
 258                         else
 259                                 errx(1, "invalid interface %s", *argv);
 260                 }
 261                 getdefif(); /* always call it to print the result */
 262                 break;
 263 #else
 264                 errx(1, "not supported yet");
 265                 /*NOTREACHED*/
 266 #endif
 267         case 'p':
 268                 if (argc != 0) {
 269                         usage();
 270                         /*NOTREACHED*/
 271                 }
 272                 plist();
 273                 break;
 274         case 'i':
 275                 ifinfo(arg, argc, argv);
 276                 break;
 277         case 'r':
 278                 if (argc != 0) {
 279                         usage();
 280                         /*NOTREACHED*/
 281                 }
 282                 rtrlist();
 283                 break;
 284         case 's':
 285                 if (argc < 2 || argc > 4)
 286                         usage();
 287                 exit(set(argc, argv) ? 1 : 0);
 288         case 'H':
 289                 if (argc != 0) {
 290                         usage();
 291                         /*NOTREACHED*/
 292                 }
 293                 harmonize_rtr();
 294                 break;
 295         case 'P':
 296                 if (argc != 0) {
 297                         usage();
 298                         /*NOTREACHED*/
 299                 }
 300                 pfx_flush();
 301                 break;
 302         case 'R':
 303                 if (argc != 0) {
 304                         usage();
 305                         /*NOTREACHED*/
 306                 }
 307                 rtr_flush();
 308                 break;
 309         case 0:
 310                 if (argc != 1) {
 311                         usage();
 312                         /*NOTREACHED*/
 313                 }
 314                 get(argv[0]);
 315                 break;
 316         }
 317         exit(0);
 318 }
 319
 320 /*
 321  * Process a file to set standard ndp entries
 322  */
 323 int
 324 file(name)
 325         char *name;
 326 {
 327         FILE *fp;
 328         int i, retval;
 329         char line[100], arg[5][50], *args[5];
 330
 331         if ((fp = fopen(name, "r")) == NULL) {
 332                 fprintf(stderr, "ndp: cannot open %s\n", name);
 333                 exit(1);
 334         }
 335         args[0] = &arg[0][0];
 336         args[1] = &arg[1][0];
 337         args[2] = &arg[2][0];
 338         args[3] = &arg[3][0];
 339         args[4] = &arg[4][0];
 340         retval = 0;
 341         while (fgets(line, sizeof(line), fp) != NULL) {
 342                 i = sscanf(line, "%49s %49s %49s %49s %49s",
 343                     arg[0], arg[1], arg[2], arg[3], arg[4]);
 344                 if (i < 2) {
 345                         fprintf(stderr, "ndp: bad line: %s\n", line);
 346                         retval = 1;
 347                         continue;
 348                 }
 349                 if (set(i, args))
 350                         retval = 1;
 351         }
 352         fclose(fp);
 353         return (retval);
 354 }
 355
 356 void
 357 getsocket()
 358 {
 359         if (s < 0) {
 360                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 361                 if (s < 0) {
 362                         err(1, "socket");
 363                         /* NOTREACHED */
 364                 }
 365         }
 366 }
 367
 368 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 369 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 370 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 371 int     expire_time, 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 #ifdef __KAME__
 409         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 410                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 411                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 412         }
 413 #endif
 414         ea = (u_char *)LLADDR(&sdl_m);
 415         if (ndp_ether_aton(eaddr, ea) == 0)
 416                 sdl_m.sdl_alen = 6;
 417         flags = expire_time = 0;
 418         while (argc-- > 0) {
 419                 if (strncmp(argv[0], "temp", 4) == 0) {
 420                         struct timeval time;
 421
 422                         gettimeofday(&time, 0);
 423                         expire_time = time.tv_sec + 20 * 60;
 424                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 425                         flags |= RTF_ANNOUNCE;
 426                 argv++;
 427         }
 428         if (rtmsg(RTM_GET) < 0) {
 429                 errx(1, "RTM_GET(%s) failed", host);
 430                 /* NOTREACHED */
 431         }
 432         sin = (struct sockaddr_in6 *)(rtm + 1);
 433         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 434         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 435                 if (sdl->sdl_family == AF_LINK &&
 436                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 437                         switch (sdl->sdl_type) {
 438                         case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 439                         case IFT_ISO88024: case IFT_ISO88025:
 440                         case IFT_L2VLAN: case IFT_BRIDGE:
 441                                 goto overwrite;
 442                         }
 443                 }
 444                 /*
 445                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 446                  */
 447                 fprintf(stderr, "set: cannot configure a new entry\n");
 448                 return 1;
 449         }
 450
 451 overwrite:
 452         if (sdl->sdl_family != AF_LINK) {
 453                 printf("cannot intuit interface index and type for %s\n", host);
 454                 return (1);
 455         }
 456         sdl_m.sdl_type = sdl->sdl_type;
 457         sdl_m.sdl_index = sdl->sdl_index;
 458         return (rtmsg(RTM_ADD));
 459 }
 460
 461 /*
 462  * Display an individual neighbor cache entry
 463  */
 464 void
 465 get(host)
 466         char *host;
 467 {
 468         struct sockaddr_in6 *sin = &sin_m;
 469         struct addrinfo hints, *res;
 470         int gai_error;
 471
 472         sin_m = blank_sin;
 473         bzero(&hints, sizeof(hints));
 474         hints.ai_family = AF_INET6;
 475         gai_error = getaddrinfo(host, NULL, &hints, &res);
 476         if (gai_error) {
 477                 fprintf(stderr, "ndp: %s: %s\n", host,
 478                     gai_strerror(gai_error));
 479                 return;
 480         }
 481         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 482 #ifdef __KAME__
 483         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 484                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 485                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 486         }
 487 #endif
 488         dump(&sin->sin6_addr, 0);
 489         if (found_entry == 0) {
 490                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 491                     sizeof(host_buf), NULL ,0,
 492                     (nflag ? NI_NUMERICHOST : 0));
 493                 printf("%s (%s) -- no entry\n", host, host_buf);
 494                 exit(1);
 495         }
 496 }
 497
 498 /*
 499  * Delete a neighbor cache entry
 500  */
 501 int
 502 delete(host)
 503         char *host;
 504 {
 505         struct sockaddr_in6 *sin = &sin_m;
 506         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 507         register char *cp = m_rtmsg.m_space;
 508         struct sockaddr_dl *sdl;
 509         struct addrinfo hints, *res;
 510         int gai_error;
 511
 512         getsocket();
 513         sin_m = blank_sin;
 514
 515         bzero(&hints, sizeof(hints));
 516         hints.ai_family = AF_INET6;
 517         gai_error = getaddrinfo(host, NULL, &hints, &res);
 518         if (gai_error) {
 519                 fprintf(stderr, "ndp: %s: %s\n", host,
 520                     gai_strerror(gai_error));
 521                 return 1;
 522         }
 523         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 524 #ifdef __KAME__
 525         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 526                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 527                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 528         }
 529 #endif
 530         if (rtmsg(RTM_GET) < 0) {
 531                 errx(1, "RTM_GET(%s) failed", host);
 532                 /* NOTREACHED */
 533         }
 534         sin = (struct sockaddr_in6 *)(rtm + 1);
 535         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 536         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 537                 if (sdl->sdl_family == AF_LINK &&
 538                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 539                         goto delete;
 540                 }
 541                 /*
 542                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 543                  */
 544                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 545                 return 1;
 546         }
 547
 548 delete:
 549         if (sdl->sdl_family != AF_LINK) {
 550                 printf("cannot locate %s\n", host);
 551                 return (1);
 552         }
 553         /*
 554          * need to reinit the field because it has rt_key
 555          * but we want the actual address
 556          */
 557         NEXTADDR(RTA_DST, sin_m);
 558         rtm->rtm_flags |= RTF_LLDATA;
 559         if (rtmsg(RTM_DELETE) == 0) {
 560                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 561
 562 #ifdef __KAME__
 563                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 564                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 565                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 566                 }
 567 #endif
 568                 getnameinfo((struct sockaddr *)&s6,
 569                     s6.sin6_len, host_buf,
 570                     sizeof(host_buf), NULL, 0,
 571                     (nflag ? NI_NUMERICHOST : 0));
 572                 printf("%s (%s) deleted\n", host, host_buf);
 573         }
 574
 575         return 0;
 576 }
 577
 578 #define W_ADDR  36
 579 #define W_LL    17
 580 #define W_IF    6
 581
 582 /*
 583  * Dump the entire neighbor cache
 584  */
 585 void
 586 dump(addr, cflag)
 587         struct in6_addr *addr;
 588         int cflag;
 589 {
 590         int mib[6];
 591         size_t needed;
 592         char *lim, *buf, *next;
 593         struct rt_msghdr *rtm;
 594         struct sockaddr_in6 *sin;
 595         struct sockaddr_dl *sdl;
 596         extern int h_errno;
 597         struct in6_nbrinfo *nbi;
 598         struct timeval time;
 599         int addrwidth;
 600         int llwidth;
 601         int ifwidth;
 602         char flgbuf[8];
 603         char *ifname;
 604
 605         /* Print header */
 606         if (!tflag && !cflag)
 607                 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 608                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 609                     W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 610
 611 again:;
 612         mib[0] = CTL_NET;
 613         mib[1] = PF_ROUTE;
 614         mib[2] = 0;
 615         mib[3] = AF_INET6;
 616         mib[4] = NET_RT_FLAGS;
 617 #ifdef RTF_LLINFO
 618         mib[5] = RTF_LLINFO;
 619 #else
 620         mib[5] = 0;
 621 #endif
 622         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 623                 err(1, "sysctl(PF_ROUTE estimate)");
 624         if (needed > 0) {
 625                 if ((buf = malloc(needed)) == NULL)
 626                         err(1, "malloc");
 627                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 628                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 629                 lim = buf + needed;
 630         } else
 631                 buf = lim = NULL;
 632
 633         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 634                 int isrouter = 0, prbs = 0;
 635
 636                 rtm = (struct rt_msghdr *)next;
 637                 sin = (struct sockaddr_in6 *)(rtm + 1);
 638                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 639
 640                 /*
 641                  * Some OSes can produce a route that has the LINK flag but
 642                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 643                  * and BSD/OS, where xx is not the interface identifier on
 644                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 645                  * so we skip them.
 646                  * XXX: such routes should have the GATEWAY flag, not the
 647                  * LINK flag.  However, there is rotten routing software
 648                  * that advertises all routes that have the GATEWAY flag.
 649                  * Thus, KAME kernel intentionally does not set the LINK flag.
 650                  * What is to be fixed is not ndp, but such routing software
 651                  * (and the kernel workaround)...
 652                  */
 653                 if (sdl->sdl_family != AF_LINK)
 654                         continue;
 655
 656                 if (!(rtm->rtm_flags & RTF_HOST))
 657                         continue;
 658
 659                 if (addr) {
 660                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 661                                 continue;
 662                         found_entry = 1;
 663                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 664                         continue;
 665                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 666                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 667                         /* XXX: should scope id be filled in the kernel? */
 668                         if (sin->sin6_scope_id == 0)
 669                                 sin->sin6_scope_id = sdl->sdl_index;
 670 #ifdef __KAME__
 671                         /* KAME specific hack; removed the embedded id */
 672                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 673 #endif
 674                 }
 675                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 676                     sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
 677                 if (cflag) {
 678 #ifdef RTF_WASCLONED
 679                         if (rtm->rtm_flags & RTF_WASCLONED)
 680                                 delete(host_buf);
 681 #elif defined(RTF_CLONED)
 682                         if (rtm->rtm_flags & RTF_CLONED)
 683                                 delete(host_buf);
 684 #else
 685                         delete(host_buf);
 686 #endif
 687                         continue;
 688                 }
 689                 gettimeofday(&time, 0);
 690                 if (tflag)
 691                         ts_print(&time);
 692
 693                 addrwidth = strlen(host_buf);
 694                 if (addrwidth < W_ADDR)
 695                         addrwidth = W_ADDR;
 696                 llwidth = strlen(ether_str(sdl));
 697                 if (W_ADDR + W_LL - addrwidth > llwidth)
 698                         llwidth = W_ADDR + W_LL - addrwidth;
 699                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 700                 if (!ifname)
 701                         ifname = "?";
 702                 ifwidth = strlen(ifname);
 703                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 704                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 705
 706                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 707                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 708
 709                 /* Print neighbor discovery specific informations */
 710                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 711                 if (nbi) {
 712                         if (nbi->expire > time.tv_sec) {
 713                                 printf(" %-9.9s",
 714                                     sec2str(nbi->expire - time.tv_sec));
 715                         } else if (nbi->expire == 0)
 716                                 printf(" %-9.9s", "permanent");
 717                         else
 718                                 printf(" %-9.9s", "expired");
 719
 720                         switch (nbi->state) {
 721                         case ND6_LLINFO_NOSTATE:
 722                                  printf(" N");
 723                                  break;
 724 #ifdef ND6_LLINFO_WAITDELETE
 725                         case ND6_LLINFO_WAITDELETE:
 726                                  printf(" W");
 727                                  break;
 728 #endif
 729                         case ND6_LLINFO_INCOMPLETE:
 730                                  printf(" I");
 731                                  break;
 732                         case ND6_LLINFO_REACHABLE:
 733                                  printf(" R");
 734                                  break;
 735                         case ND6_LLINFO_STALE:
 736                                  printf(" S");
 737                                  break;
 738                         case ND6_LLINFO_DELAY:
 739                                  printf(" D");
 740                                  break;
 741                         case ND6_LLINFO_PROBE:
 742                                  printf(" P");
 743                                  break;
 744                         default:
 745                                  printf(" ?");
 746                                  break;
 747                         }
 748
 749                         isrouter = nbi->isrouter;
 750                         prbs = nbi->asked;
 751                 } else {
 752                         warnx("failed to get neighbor information");
 753                         printf("  ");
 754                 }
 755
 756                 /*
 757                  * other flags. R: router, P: proxy, W: ??
 758                  */
 759                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 760                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 761                             isrouter ? "R" : "",
 762                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 763                 } else {
 764                         sin = (struct sockaddr_in6 *)
 765                             (sdl->sdl_len + (char *)sdl);
 766 #if 0   /* W and P are mystery even for us */
 767                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 768                             isrouter ? "R" : "",
 769                             !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 770                             (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 771                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 772 #else
 773                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 774                             isrouter ? "R" : "",
 775                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 776 #endif
 777                 }
 778                 printf(" %s", flgbuf);
 779
 780                 if (prbs)
 781                         printf(" %d", prbs);
 782
 783                 printf("\n");
 784         }
 785         if (buf != NULL)
 786                 free(buf);
 787
 788         if (repeat) {
 789                 printf("\n");
 790                 fflush(stdout);
 791                 sleep(repeat);
 792                 goto again;
 793         }
 794 }
 795
 796 static struct in6_nbrinfo *
 797 getnbrinfo(addr, ifindex, warning)
 798         struct in6_addr *addr;
 799         int ifindex;
 800         int warning;
 801 {
 802         static struct in6_nbrinfo nbi;
 803         int s;
 804
 805         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 806                 err(1, "socket");
 807
 808         bzero(&nbi, sizeof(nbi));
 809         if_indextoname(ifindex, nbi.ifname);
 810         nbi.addr = *addr;
 811         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 812                 if (warning)
 813                         warn("ioctl(SIOCGNBRINFO_IN6)");
 814                 close(s);
 815                 return(NULL);
 816         }
 817
 818         close(s);
 819         return(&nbi);
 820 }
 821
 822 static char *
 823 ether_str(sdl)
 824         struct sockaddr_dl *sdl;
 825 {
 826         static char hbuf[NI_MAXHOST];
 827         u_char *cp;
 828
 829         if (sdl->sdl_alen) {
 830                 cp = (u_char *)LLADDR(sdl);
 831                 snprintf(hbuf, sizeof(hbuf), "%x:%x:%x:%x:%x:%x",
 832                     cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 833         } else
 834                 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
 835
 836         return(hbuf);
 837 }
 838
 839 int
 840 ndp_ether_aton(a, n)
 841         char *a;
 842         u_char *n;
 843 {
 844         int i, o[6];
 845
 846         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 847             &o[3], &o[4], &o[5]);
 848         if (i != 6) {
 849                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 850                 return (1);
 851         }
 852         for (i = 0; i < 6; i++)
 853                 n[i] = o[i];
 854         return (0);
 855 }
 856
 857 void
 858 usage()
 859 {
 860         printf("usage: ndp [-nt] hostname\n");
 861         printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
 862         printf("       ndp [-nt] -A wait\n");
 863         printf("       ndp [-nt] -d hostname\n");
 864         printf("       ndp [-nt] -f filename\n");
 865         printf("       ndp [-nt] -i interface [flags...]\n");
 866 #ifdef SIOCSDEFIFACE_IN6
 867         printf("       ndp [-nt] -I [interface|delete]\n");
 868 #endif
 869         printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
 870         exit(1);
 871 }
 872
 873 int
 874 rtmsg(cmd)
 875         int cmd;
 876 {
 877         static int seq;
 878         int rlen;
 879         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 880         register char *cp = m_rtmsg.m_space;
 881         register int l;
 882
 883         errno = 0;
 884         if (cmd == RTM_DELETE)
 885                 goto doit;
 886         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 887         rtm->rtm_flags = flags;
 888         rtm->rtm_version = RTM_VERSION;
 889
 890         switch (cmd) {
 891         default:
 892                 fprintf(stderr, "ndp: internal wrong cmd\n");
 893                 exit(1);
 894         case RTM_ADD:
 895                 rtm->rtm_addrs |= RTA_GATEWAY;
 896                 if (expire_time) {
 897                         rtm->rtm_rmx.rmx_expire = expire_time;
 898                         rtm->rtm_inits = RTV_EXPIRE;
 899                 }
 900                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
 901 #if 0 /* we don't support ipv6addr/128 type proxying */
 902                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 903                         rtm->rtm_flags &= ~RTF_HOST;
 904                         rtm->rtm_addrs |= RTA_NETMASK;
 905                 }
 906 #endif
 907                 /* FALLTHROUGH */
 908         case RTM_GET:
 909                 rtm->rtm_addrs |= RTA_DST;
 910         }
 911
 912         NEXTADDR(RTA_DST, sin_m);
 913         NEXTADDR(RTA_GATEWAY, sdl_m);
 914 #if 0 /* we don't support ipv6addr/128 type proxying */
 915         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 916         NEXTADDR(RTA_NETMASK, so_mask);
 917 #endif
 918
 919         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 920 doit:
 921         l = rtm->rtm_msglen;
 922         rtm->rtm_seq = ++seq;
 923         rtm->rtm_type = cmd;
 924         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 925                 if (errno != ESRCH || cmd != RTM_DELETE) {
 926                         err(1, "writing to routing socket");
 927                         /* NOTREACHED */
 928                 }
 929         }
 930         do {
 931                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 932         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 933         if (l < 0)
 934                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 935                     strerror(errno));
 936         return (0);
 937 }
 938
 939 void
 940 ifinfo(ifname, argc, argv)
 941         char *ifname;
 942         int argc;
 943         char **argv;
 944 {
 945         struct in6_ndireq nd;
 946         int i, s;
 947         u_int32_t newflags;
 948 #ifdef IPV6CTL_USETEMPADDR
 949         u_int8_t nullbuf[8];
 950 #endif
 951
 952         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 953                 err(1, "socket");
 954                 /* NOTREACHED */
 955         }
 956         bzero(&nd, sizeof(nd));
 957         strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
 958         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 959                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 960                 /* NOTREACHED */
 961         }
 962 #define ND nd.ndi
 963         newflags = ND.flags;
 964         for (i = 0; i < argc; i++) {
 965                 int clear = 0;
 966                 char *cp = argv[i];
 967
 968                 if (*cp == '-') {
 969                         clear = 1;
 970                         cp++;
 971                 }
 972
 973 #define SETFLAG(s, f) \
 974         do {\
 975                 if (strcmp(cp, (s)) == 0) {\
 976                         if (clear)\
 977                                 newflags &= ~(f);\
 978                         else\
 979                                 newflags |= (f);\
 980                 }\
 981         } while (0)
 982 /*
 983  * XXX: this macro is not 100% correct, in that it matches "nud" against
 984  *      "nudbogus".  But we just let it go since this is minor.
 985  */
 986 #define SETVALUE(f, v) \
 987         do { \
 988                 char *valptr; \
 989                 unsigned long newval; \
 990                 v = 0; /* unspecified */ \
 991                 if (strncmp(cp, f, strlen(f)) == 0) { \
 992                         valptr = strchr(cp, '='); \
 993                         if (valptr == NULL) \
 994                                 err(1, "syntax error in %s field", (f)); \
 995                         errno = 0; \
 996                         newval = strtoul(++valptr, NULL, 0); \
 997                         if (errno) \
 998                                 err(1, "syntax error in %s's value", (f)); \
 999                         v = newval; \
1000                 } \
1001         } while (0)
1002
1003                 SETFLAG("disabled", ND6_IFF_IFDISABLED);
1004                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
1005 #ifdef ND6_IFF_ACCEPT_RTADV
1006                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
1007 #endif
1008 #ifdef ND6_IFF_PREFER_SOURCE
1009                 SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
1010 #endif
1011                 SETVALUE("basereachable", ND.basereachable);
1012                 SETVALUE("retrans", ND.retrans);
1013                 SETVALUE("curhlim", ND.chlim);
1014
1015                 ND.flags = newflags;
1016                 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
1017                         err(1, "ioctl(SIOCSIFINFO_IN6)");
1018                         /* NOTREACHED */
1019                 }
1020 #undef SETFLAG
1021 #undef SETVALUE
1022         }
1023
1024         if (!ND.initialized) {
1025                 errx(1, "%s: not initialized yet", ifname);
1026                 /* NOTREACHED */
1027         }
1028
1029         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1030                 err(1, "ioctl(SIOCGIFINFO_IN6)");
1031                 /* NOTREACHED */
1032         }
1033         printf("linkmtu=%d", ND.linkmtu);
1034         printf(", maxmtu=%d", ND.maxmtu);
1035         printf(", curhlim=%d", ND.chlim);
1036         printf(", basereachable=%ds%dms",
1037             ND.basereachable / 1000, ND.basereachable % 1000);
1038         printf(", reachable=%ds", ND.reachable);
1039         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1040 #ifdef IPV6CTL_USETEMPADDR
1041         memset(nullbuf, 0, sizeof(nullbuf));
1042         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1043                 int j;
1044                 u_int8_t *rbuf;
1045
1046                 for (i = 0; i < 3; i++) {
1047                         switch (i) {
1048                         case 0:
1049                                 printf("\nRandom seed(0): ");
1050                                 rbuf = ND.randomseed0;
1051                                 break;
1052                         case 1:
1053                                 printf("\nRandom seed(1): ");
1054                                 rbuf = ND.randomseed1;
1055                                 break;
1056                         case 2:
1057                                 printf("\nRandom ID:      ");
1058                                 rbuf = ND.randomid;
1059                                 break;
1060                         default:
1061                                 errx(1, "impossible case for tempaddr display");
1062                         }
1063                         for (j = 0; j < 8; j++)
1064                                 printf("%02x", rbuf[j]);
1065                 }
1066         }
1067 #endif
1068         if (ND.flags) {
1069                 printf("\nFlags: ");
1070 #ifdef ND6_IFF_IFDISABLED
1071                 if ((ND.flags & ND6_IFF_IFDISABLED))
1072                         printf("disabled ");
1073 #endif
1074                 if ((ND.flags & ND6_IFF_PERFORMNUD))
1075                         printf("nud ");
1076 #ifdef ND6_IFF_ACCEPT_RTADV
1077                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1078                         printf("accept_rtadv ");
1079 #endif
1080 #ifdef ND6_IFF_PREFER_SOURCE
1081                 if ((ND.flags & ND6_IFF_PREFER_SOURCE))
1082                         printf("prefer_source ");
1083 #endif
1084         }
1085         putc('\n', stdout);
1086 #undef ND
1087
1088         close(s);
1089 }
1090
1091 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1092 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1093 #endif
1094
1095 void
1096 rtrlist()
1097 {
1098 #ifdef ICMPV6CTL_ND6_DRLIST
1099         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1100         char *buf;
1101         struct in6_defrouter *p, *ep;
1102         size_t l;
1103         struct timeval time;
1104
1105         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1106                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1107                 /*NOTREACHED*/
1108         }
1109         if (l == 0)
1110                 return;
1111         buf = malloc(l);
1112         if (!buf) {
1113                 err(1, "malloc");
1114                 /*NOTREACHED*/
1115         }
1116         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1117                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1118                 /*NOTREACHED*/
1119         }
1120
1121         ep = (struct in6_defrouter *)(buf + l);
1122         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1123                 int rtpref;
1124
1125                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1126                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1127                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1128                         strlcpy(host_buf, "?", sizeof(host_buf));
1129
1130                 printf("%s if=%s", host_buf,
1131                     if_indextoname(p->if_index, ifix_buf));
1132                 printf(", flags=%s%s",
1133                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1134                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1135                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1136                 printf(", pref=%s", rtpref_str[rtpref]);
1137
1138                 gettimeofday(&time, 0);
1139                 if (p->expire == 0)
1140                         printf(", expire=Never\n");
1141                 else
1142                         printf(", expire=%s\n",
1143                             sec2str(p->expire - time.tv_sec));
1144         }
1145         free(buf);
1146 #else
1147         struct in6_drlist dr;
1148         int s, i;
1149         struct timeval time;
1150
1151         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1152                 err(1, "socket");
1153                 /* NOTREACHED */
1154         }
1155         bzero(&dr, sizeof(dr));
1156         strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1157         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1158                 err(1, "ioctl(SIOCGDRLST_IN6)");
1159                 /* NOTREACHED */
1160         }
1161 #define DR dr.defrouter[i]
1162         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1163                 struct sockaddr_in6 sin6;
1164
1165                 bzero(&sin6, sizeof(sin6));
1166                 sin6.sin6_family = AF_INET6;
1167                 sin6.sin6_len = sizeof(sin6);
1168                 sin6.sin6_addr = DR.rtaddr;
1169                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1170                     sizeof(host_buf), NULL, 0,
1171                     (nflag ? NI_NUMERICHOST : 0));
1172
1173                 printf("%s if=%s", host_buf,
1174                     if_indextoname(DR.if_index, ifix_buf));
1175                 printf(", flags=%s%s",
1176                     DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1177                     DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1178                 gettimeofday(&time, 0);
1179                 if (DR.expire == 0)
1180                         printf(", expire=Never\n");
1181                 else
1182                         printf(", expire=%s\n",
1183                             sec2str(DR.expire - time.tv_sec));
1184         }
1185 #undef DR
1186         close(s);
1187 #endif
1188 }
1189
1190 void
1191 plist()
1192 {
1193 #ifdef ICMPV6CTL_ND6_PRLIST
1194         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1195         char *buf;
1196         struct in6_prefix *p, *ep, *n;
1197         struct sockaddr_in6 *advrtr;
1198         size_t l;
1199         struct timeval time;
1200         const int niflags = NI_NUMERICHOST;
1201         int ninflags = nflag ? NI_NUMERICHOST : 0;
1202         char namebuf[NI_MAXHOST];
1203
1204         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1205                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1206                 /*NOTREACHED*/
1207         }
1208         buf = malloc(l);
1209         if (!buf) {
1210                 err(1, "malloc");
1211                 /*NOTREACHED*/
1212         }
1213         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1214                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1215                 /*NOTREACHED*/
1216         }
1217
1218         ep = (struct in6_prefix *)(buf + l);
1219         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1220                 advrtr = (struct sockaddr_in6 *)(p + 1);
1221                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1222
1223                 if (getnameinfo((struct sockaddr *)&p->prefix,
1224                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1225                     NULL, 0, niflags) != 0)
1226                         strlcpy(namebuf, "?", sizeof(namebuf));
1227                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1228                     if_indextoname(p->if_index, ifix_buf));
1229
1230                 gettimeofday(&time, 0);
1231                 /*
1232                  * meaning of fields, especially flags, is very different
1233                  * by origin.  notify the difference to the users.
1234                  */
1235                 printf("flags=%s%s%s%s%s",
1236                     p->raflags.onlink ? "L" : "",
1237                     p->raflags.autonomous ? "A" : "",
1238                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1239                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1240 #ifdef NDPRF_HOME
1241                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1242 #else
1243                     ""
1244 #endif
1245                     );
1246                 if (p->vltime == ND6_INFINITE_LIFETIME)
1247                         printf(" vltime=infinity");
1248                 else
1249                         printf(" vltime=%lu", (unsigned long)p->vltime);
1250                 if (p->pltime == ND6_INFINITE_LIFETIME)
1251                         printf(", pltime=infinity");
1252                 else
1253                         printf(", pltime=%lu", (unsigned long)p->pltime);
1254                 if (p->expire == 0)
1255                         printf(", expire=Never");
1256                 else if (p->expire >= time.tv_sec)
1257                         printf(", expire=%s",
1258                             sec2str(p->expire - time.tv_sec));
1259                 else
1260                         printf(", expired");
1261                 printf(", ref=%d", p->refcnt);
1262                 printf("\n");
1263                 /*
1264                  * "advertising router" list is meaningful only if the prefix
1265                  * information is from RA.
1266                  */
1267                 if (p->advrtrs) {
1268                         int j;
1269                         struct sockaddr_in6 *sin6;
1270
1271                         sin6 = advrtr;
1272                         printf("  advertised by\n");
1273                         for (j = 0; j < p->advrtrs; j++) {
1274                                 struct in6_nbrinfo *nbi;
1275
1276                                 if (getnameinfo((struct sockaddr *)sin6,
1277                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1278                                     NULL, 0, ninflags) != 0)
1279                                         strlcpy(namebuf, "?", sizeof(namebuf));
1280                                 printf("    %s", namebuf);
1281
1282                                 nbi = getnbrinfo(&sin6->sin6_addr,
1283                                     p->if_index, 0);
1284                                 if (nbi) {
1285                                         switch (nbi->state) {
1286                                         case ND6_LLINFO_REACHABLE:
1287                                         case ND6_LLINFO_STALE:
1288                                         case ND6_LLINFO_DELAY:
1289                                         case ND6_LLINFO_PROBE:
1290                                                 printf(" (reachable)\n");
1291                                                 break;
1292                                         default:
1293                                                 printf(" (unreachable)\n");
1294                                         }
1295                                 } else
1296                                         printf(" (no neighbor state)\n");
1297                                 sin6++;
1298                         }
1299                 } else
1300                         printf("  No advertising router\n");
1301         }
1302         free(buf);
1303 #else
1304         struct in6_prlist pr;
1305         int s, i;
1306         struct timeval time;
1307
1308         gettimeofday(&time, 0);
1309
1310         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1311                 err(1, "socket");
1312                 /* NOTREACHED */
1313         }
1314         bzero(&pr, sizeof(pr));
1315         strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1316         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1317                 err(1, "ioctl(SIOCGPRLST_IN6)");
1318                 /* NOTREACHED */
1319         }
1320 #define PR pr.prefix[i]
1321         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1322                 struct sockaddr_in6 p6;
1323                 char namebuf[NI_MAXHOST];
1324                 int niflags;
1325
1326 #ifdef NDPRF_ONLINK
1327                 p6 = PR.prefix;
1328 #else
1329                 memset(&p6, 0, sizeof(p6));
1330                 p6.sin6_family = AF_INET6;
1331                 p6.sin6_len = sizeof(p6);
1332                 p6.sin6_addr = PR.prefix;
1333 #endif
1334
1335                 /*
1336                  * copy link index to sin6_scope_id field.
1337                  * XXX: KAME specific.
1338                  */
1339                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1340                         u_int16_t linkid;
1341
1342                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1343                             sizeof(linkid));
1344                         linkid = ntohs(linkid);
1345                         p6.sin6_scope_id = linkid;
1346                         p6.sin6_addr.s6_addr[2] = 0;
1347                         p6.sin6_addr.s6_addr[3] = 0;
1348                 }
1349
1350                 niflags = NI_NUMERICHOST;
1351                 if (getnameinfo((struct sockaddr *)&p6,
1352                     sizeof(p6), namebuf, sizeof(namebuf),
1353                     NULL, 0, niflags)) {
1354                         warnx("getnameinfo failed");
1355                         continue;
1356                 }
1357                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1358                     if_indextoname(PR.if_index, ifix_buf));
1359
1360                 gettimeofday(&time, 0);
1361                 /*
1362                  * meaning of fields, especially flags, is very different
1363                  * by origin.  notify the difference to the users.
1364                  */
1365 #if 0
1366                 printf("  %s",
1367                     PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1368 #endif
1369 #ifdef NDPRF_ONLINK
1370                 printf("flags=%s%s%s%s%s",
1371                     PR.raflags.onlink ? "L" : "",
1372                     PR.raflags.autonomous ? "A" : "",
1373                     (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1374                     (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1375 #ifdef NDPRF_HOME
1376                     (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1377 #else
1378                     ""
1379 #endif
1380                     );
1381 #else
1382                 printf("flags=%s%s",
1383                     PR.raflags.onlink ? "L" : "",
1384                     PR.raflags.autonomous ? "A" : "");
1385 #endif
1386                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1387                         printf(" vltime=infinity");
1388                 else
1389                         printf(" vltime=%lu", PR.vltime);
1390                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1391                         printf(", pltime=infinity");
1392                 else
1393                         printf(", pltime=%lu", PR.pltime);
1394                 if (PR.expire == 0)
1395                         printf(", expire=Never");
1396                 else if (PR.expire >= time.tv_sec)
1397                         printf(", expire=%s",
1398                             sec2str(PR.expire - time.tv_sec));
1399                 else
1400                         printf(", expired");
1401 #ifdef NDPRF_ONLINK
1402                 printf(", ref=%d", PR.refcnt);
1403 #endif
1404 #if 0
1405                 switch (PR.origin) {
1406                 case PR_ORIG_RA:
1407                         printf(", origin=RA");
1408                         break;
1409                 case PR_ORIG_RR:
1410                         printf(", origin=RR");
1411                         break;
1412                 case PR_ORIG_STATIC:
1413                         printf(", origin=static");
1414                         break;
1415                 case PR_ORIG_KERNEL:
1416                         printf(", origin=kernel");
1417                         break;
1418                 default:
1419                         printf(", origin=?");
1420                         break;
1421                 }
1422 #endif
1423                 printf("\n");
1424                 /*
1425                  * "advertising router" list is meaningful only if the prefix
1426                  * information is from RA.
1427                  */
1428                 if (0 &&        /* prefix origin is almost obsolted */
1429                     PR.origin != PR_ORIG_RA)
1430                         ;
1431                 else if (PR.advrtrs) {
1432                         int j;
1433                         printf("  advertised by\n");
1434                         for (j = 0; j < PR.advrtrs; j++) {
1435                                 struct sockaddr_in6 sin6;
1436                                 struct in6_nbrinfo *nbi;
1437
1438                                 bzero(&sin6, sizeof(sin6));
1439                                 sin6.sin6_family = AF_INET6;
1440                                 sin6.sin6_len = sizeof(sin6);
1441                                 sin6.sin6_addr = PR.advrtr[j];
1442                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1443                                 getnameinfo((struct sockaddr *)&sin6,
1444                                     sin6.sin6_len, host_buf,
1445                                     sizeof(host_buf), NULL, 0,
1446                                     (nflag ? NI_NUMERICHOST : 0));
1447                                 printf("    %s", host_buf);
1448
1449                                 nbi = getnbrinfo(&sin6.sin6_addr,
1450                                     PR.if_index, 0);
1451                                 if (nbi) {
1452                                         switch (nbi->state) {
1453                                         case ND6_LLINFO_REACHABLE:
1454                                         case ND6_LLINFO_STALE:
1455                                         case ND6_LLINFO_DELAY:
1456                                         case ND6_LLINFO_PROBE:
1457                                                  printf(" (reachable)\n");
1458                                                  break;
1459                                         default:
1460                                                  printf(" (unreachable)\n");
1461                                         }
1462                                 } else
1463                                         printf(" (no neighbor state)\n");
1464                         }
1465                         if (PR.advrtrs > DRLSTSIZ)
1466                                 printf("    and %d routers\n",
1467                                     PR.advrtrs - DRLSTSIZ);
1468                 } else
1469                         printf("  No advertising router\n");
1470         }
1471 #undef PR
1472         close(s);
1473 #endif
1474 }
1475
1476 void
1477 pfx_flush()
1478 {
1479         char dummyif[IFNAMSIZ+8];
1480         int s;
1481
1482         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1483                 err(1, "socket");
1484         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1485         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1486                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1487 }
1488
1489 void
1490 rtr_flush()
1491 {
1492         char dummyif[IFNAMSIZ+8];
1493         int s;
1494
1495         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1496                 err(1, "socket");
1497         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1498         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1499                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1500
1501         close(s);
1502 }
1503
1504 void
1505 harmonize_rtr()
1506 {
1507         char dummyif[IFNAMSIZ+8];
1508         int s;
1509
1510         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1511                 err(1, "socket");
1512         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1513         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1514                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1515
1516         close(s);
1517 }
1518
1519 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1520 static void
1521 setdefif(ifname)
1522         char *ifname;
1523 {
1524         struct in6_ndifreq ndifreq;
1525         unsigned int ifindex;
1526
1527         if (strcasecmp(ifname, "delete") == 0)
1528                 ifindex = 0;
1529         else {
1530                 if ((ifindex = if_nametoindex(ifname)) == 0)
1531                         err(1, "failed to resolve i/f index for %s", ifname);
1532         }
1533
1534         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1535                 err(1, "socket");
1536
1537         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1538         ndifreq.ifindex = ifindex;
1539
1540         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1541                 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1542
1543         close(s);
1544 }
1545
1546 static void
1547 getdefif()
1548 {
1549         struct in6_ndifreq ndifreq;
1550         char ifname[IFNAMSIZ+8];
1551
1552         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1553                 err(1, "socket");
1554
1555         memset(&ndifreq, 0, sizeof(ndifreq));
1556         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1557
1558         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1559                 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1560
1561         if (ndifreq.ifindex == 0)
1562                 printf("No default interface.\n");
1563         else {
1564                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1565                         err(1, "failed to resolve ifname for index %lu",
1566                             ndifreq.ifindex);
1567                 printf("ND default interface = %s\n", ifname);
1568         }
1569
1570         close(s);
1571 }
1572 #endif
1573
1574 static char *
1575 sec2str(total)
1576         time_t total;
1577 {
1578         static char result[256];
1579         int days, hours, mins, secs;
1580         int first = 1;
1581         char *p = result;
1582         char *ep = &result[sizeof(result)];
1583         int n;
1584
1585         days = total / 3600 / 24;
1586         hours = (total / 3600) % 24;
1587         mins = (total / 60) % 60;
1588         secs = total % 60;
1589
1590         if (days) {
1591                 first = 0;
1592                 n = snprintf(p, ep - p, "%dd", days);
1593                 if (n < 0 || n >= ep - p)
1594                         return "?";
1595                 p += n;
1596         }
1597         if (!first || hours) {
1598                 first = 0;
1599                 n = snprintf(p, ep - p, "%dh", hours);
1600                 if (n < 0 || n >= ep - p)
1601                         return "?";
1602                 p += n;
1603         }
1604         if (!first || mins) {
1605                 first = 0;
1606                 n = snprintf(p, ep - p, "%dm", mins);
1607                 if (n < 0 || n >= ep - p)
1608                         return "?";
1609                 p += n;
1610         }
1611         snprintf(p, ep - p, "%ds", secs);
1612
1613         return(result);
1614 }
1615
1616 /*
1617  * Print the timestamp
1618  * from tcpdump/util.c
1619  */
1620 static void
1621 ts_print(tvp)
1622         const struct timeval *tvp;
1623 {
1624         int s;
1625
1626         /* Default */
1627         s = (tvp->tv_sec + thiszone) % 86400;
1628         (void)printf("%02d:%02d:%02d.%06u ",
1629             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1630 }
1631
1632 #undef NEXTADDR