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