usr.sbin/ndp/ndp.c

   1 /*      $FreeBSD$       */
   2 /*      $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $   */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 /*
  33  * Copyright (c) 1984, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * Sun Microsystems, Inc.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  */
  63
  64 /*
  65  * Based on:
  66  * "@(#) Copyright (c) 1984, 1993\n\
  67  *      The Regents of the University of California.  All rights reserved.\n";
  68  *
  69  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  70  */
  71
  72 /*
  73  * ndp - display, set, delete and flush neighbor cache
  74  */
  75
  76
  77 #include <sys/param.h>
  78 #include <sys/file.h>
  79 #include <sys/ioctl.h>
  80 #include <sys/socket.h>
  81 #include <sys/sysctl.h>
  82 #include <sys/time.h>
  83 #include <sys/queue.h>
  84
  85 #include <net/if.h>
  86 #include <net/if_var.h>
  87 #include <net/if_dl.h>
  88 #include <net/if_types.h>
  89 #include <net/route.h>
  90
  91 #include <netinet/in.h>
  92 #include <netinet/if_ether.h>
  93
  94 #include <netinet/icmp6.h>
  95 #include <netinet6/in6_var.h>
  96 #include <netinet6/nd6.h>
  97
  98 #include <arpa/inet.h>
  99
 100 #include <netdb.h>
 101 #include <errno.h>
 102 #include <nlist.h>
 103 #include <stdio.h>
 104 #include <string.h>
 105 #include <paths.h>
 106 #include <err.h>
 107 #include <stdlib.h>
 108 #include <fcntl.h>
 109 #include <unistd.h>
 110 #include "gmt2local.h"
 111
 112 /* packing rule for routing socket */
 113 #define ROUNDUP(a) \
 114         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 115 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 116
 117 #define NEXTADDR(w, s) \
 118         if (rtm->rtm_addrs & (w)) { \
 119                 bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);}
 120
 121
 122 static pid_t pid;
 123 static int nflag;
 124 static int tflag;
 125 static int32_t thiszone;        /* time difference with gmt */
 126 static int s = -1;
 127 static int repeat = 0;
 128
 129 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 130 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 131 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 132
 133 int main(int, char **);
 134 int file(char *);
 135 void getsocket(void);
 136 int set(int, char **);
 137 void get(char *);
 138 int delete(char *);
 139 void dump(struct in6_addr *, int);
 140 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
 141 static char *ether_str(struct sockaddr_dl *);
 142 int ndp_ether_aton(char *, u_char *);
 143 void usage(void);
 144 int rtmsg(int);
 145 void ifinfo(char *, int, char **);
 146 void rtrlist(void);
 147 void plist(void);
 148 void pfx_flush(void);
 149 void rtr_flush(void);
 150 void harmonize_rtr(void);
 151 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 152 static void getdefif(void);
 153 static void setdefif(char *);
 154 #endif
 155 static char *sec2str(time_t);
 156 static void ts_print(const struct timeval *);
 157
 158 #ifdef ICMPV6CTL_ND6_DRLIST
 159 static char *rtpref_str[] = {
 160         "medium",               /* 00 */
 161         "high",                 /* 01 */
 162         "rsv",                  /* 10 */
 163         "low"                   /* 11 */
 164 };
 165 #endif
 166
 167 int mode = 0;
 168 char *arg = NULL;
 169
 170 int
 171 main(argc, argv)
 172         int argc;
 173         char **argv;
 174 {
 175         int ch;
 176
 177         pid = getpid();
 178         thiszone = gmt2local(0);
 179         while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
 180                 switch (ch) {
 181                 case 'a':
 182                 case 'c':
 183                 case 'p':
 184                 case 'r':
 185                 case 'H':
 186                 case 'P':
 187                 case 'R':
 188                 case 's':
 189                 case 'I':
 190                         if (mode) {
 191                                 usage();
 192                                 /*NOTREACHED*/
 193                         }
 194                         mode = ch;
 195                         arg = NULL;
 196                         break;
 197                 case 'd':
 198                 case 'f':
 199                 case 'i' :
 200                         if (mode) {
 201                                 usage();
 202                                 /*NOTREACHED*/
 203                         }
 204                         mode = ch;
 205                         arg = optarg;
 206                         break;
 207                 case 'n':
 208                         nflag = 1;
 209                         break;
 210                 case 't':
 211                         tflag = 1;
 212                         break;
 213                 case 'A':
 214                         if (mode) {
 215                                 usage();
 216                                 /*NOTREACHED*/
 217                         }
 218                         mode = 'a';
 219                         repeat = atoi(optarg);
 220                         if (repeat < 0) {
 221                                 usage();
 222                                 /*NOTREACHED*/
 223                         }
 224                         break;
 225                 default:
 226                         usage();
 227                 }
 228
 229         argc -= optind;
 230         argv += optind;
 231
 232         switch (mode) {
 233         case 'a':
 234         case 'c':
 235                 if (argc != 0) {
 236                         usage();
 237                         /*NOTREACHED*/
 238                 }
 239                 dump(0, mode == 'c');
 240                 break;
 241         case 'd':
 242                 if (argc != 0) {
 243                         usage();
 244                         /*NOTREACHED*/
 245                 }
 246                 delete(arg);
 247                 break;
 248         case 'I':
 249 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 250                 if (argc > 1) {
 251                         usage();
 252                         /*NOTREACHED*/
 253                 } else if (argc == 1) {
 254                         if (strcmp(*argv, "delete") == 0 ||
 255                             if_nametoindex(*argv))
 256                                 setdefif(*argv);
 257                         else
 258                                 errx(1, "invalid interface %s", *argv);
 259                 }
 260                 getdefif(); /* always call it to print the result */
 261                 break;
 262 #else
 263                 errx(1, "not supported yet");
 264                 /*NOTREACHED*/
 265 #endif
 266         case 'p':
 267                 if (argc != 0) {
 268                         usage();
 269                         /*NOTREACHED*/
 270                 }
 271                 plist();
 272                 break;
 273         case 'i':
 274                 ifinfo(arg, argc, argv);
 275                 break;
 276         case 'r':
 277                 if (argc != 0) {
 278                         usage();
 279                         /*NOTREACHED*/
 280                 }
 281                 rtrlist();
 282                 break;
 283         case 's':
 284                 if (argc < 2 || argc > 4)
 285                         usage();
 286                 exit(set(argc, argv) ? 1 : 0);
 287         case 'H':
 288                 if (argc != 0) {
 289                         usage();
 290                         /*NOTREACHED*/
 291                 }
 292                 harmonize_rtr();
 293                 break;
 294         case 'P':
 295                 if (argc != 0) {
 296                         usage();
 297                         /*NOTREACHED*/
 298                 }
 299                 pfx_flush();
 300                 break;
 301         case 'R':
 302                 if (argc != 0) {
 303                         usage();
 304                         /*NOTREACHED*/
 305                 }
 306                 rtr_flush();
 307                 break;
 308         case 0:
 309                 if (argc != 1) {
 310                         usage();
 311                         /*NOTREACHED*/
 312                 }
 313                 get(argv[0]);
 314                 break;
 315         }
 316         exit(0);
 317 }
 318
 319 /*
 320  * Process a file to set standard ndp entries
 321  */
 322 int
 323 file(name)
 324         char *name;
 325 {
 326         FILE *fp;
 327         int i, retval;
 328         char line[100], arg[5][50], *args[5];
 329
 330         if ((fp = fopen(name, "r")) == NULL) {
 331                 fprintf(stderr, "ndp: cannot open %s\n", name);
 332                 exit(1);
 333         }
 334         args[0] = &arg[0][0];
 335         args[1] = &arg[1][0];
 336         args[2] = &arg[2][0];
 337         args[3] = &arg[3][0];
 338         args[4] = &arg[4][0];
 339         retval = 0;
 340         while (fgets(line, sizeof(line), fp) != NULL) {
 341                 i = sscanf(line, "%49s %49s %49s %49s %49s",
 342                     arg[0], arg[1], arg[2], arg[3], arg[4]);
 343                 if (i < 2) {
 344                         fprintf(stderr, "ndp: bad line: %s\n", line);
 345                         retval = 1;
 346                         continue;
 347                 }
 348                 if (set(i, args))
 349                         retval = 1;
 350         }
 351         fclose(fp);
 352         return (retval);
 353 }
 354
 355 void
 356 getsocket()
 357 {
 358         if (s < 0) {
 359                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 360                 if (s < 0) {
 361                         err(1, "socket");
 362                         /* NOTREACHED */
 363                 }
 364         }
 365 }
 366
 367 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 368 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 369 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 370 int     expire_time, flags, found_entry;
 371 struct  {
 372         struct  rt_msghdr m_rtm;
 373         char    m_space[512];
 374 }       m_rtmsg;
 375
 376 /*
 377  * Set an individual neighbor cache entry
 378  */
 379 int
 380 set(argc, argv)
 381         int argc;
 382         char **argv;
 383 {
 384         register struct sockaddr_in6 *sin = &sin_m;
 385         register struct sockaddr_dl *sdl;
 386         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 387         struct addrinfo hints, *res;
 388         int gai_error;
 389         u_char *ea;
 390         char *host = argv[0], *eaddr = argv[1];
 391
 392         getsocket();
 393         argc -= 2;
 394         argv += 2;
 395         sdl_m = blank_sdl;
 396         sin_m = blank_sin;
 397
 398         bzero(&hints, sizeof(hints));
 399         hints.ai_family = AF_INET6;
 400         gai_error = getaddrinfo(host, NULL, &hints, &res);
 401         if (gai_error) {
 402                 fprintf(stderr, "ndp: %s: %s\n", host,
 403                         gai_strerror(gai_error));
 404                 return 1;
 405         }
 406         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 407 #ifdef __KAME__
 408         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 409                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 410                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 411         }
 412 #endif
 413         ea = (u_char *)LLADDR(&sdl_m);
 414         if (ndp_ether_aton(eaddr, ea) == 0)
 415                 sdl_m.sdl_alen = 6;
 416         flags = expire_time = 0;
 417         while (argc-- > 0) {
 418                 if (strncmp(argv[0], "temp", 4) == 0) {
 419                         struct timeval time;
 420
 421                         gettimeofday(&time, 0);
 422                         expire_time = time.tv_sec + 20 * 60;
 423                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 424                         flags |= RTF_ANNOUNCE;
 425                 argv++;
 426         }
 427         if (rtmsg(RTM_GET) < 0) {
 428                 errx(1, "RTM_GET(%s) failed", host);
 429                 /* NOTREACHED */
 430         }
 431         sin = (struct sockaddr_in6 *)(rtm + 1);
 432         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 433         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 434                 if (sdl->sdl_family == AF_LINK &&
 435                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 436                         switch (sdl->sdl_type) {
 437                         case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 438                         case IFT_ISO88024: case IFT_ISO88025:
 439                         case IFT_L2VLAN: case IFT_BRIDGE:
 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(struct sockaddr_dl *sdl)
 823 {
 824         static char hbuf[NI_MAXHOST];
 825         char *cp;
 826
 827         if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 828                 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
 829                     sizeof(hbuf));
 830         } else if (sdl->sdl_alen) {
 831                 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
 832                 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
 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_AUTO_LINKLOCAL
1009                 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
1010 #endif
1011 #ifdef ND6_IFF_PREFER_SOURCE
1012                 SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
1013 #endif
1014 #ifdef ND6_IFF_NO_PREFER_IFACE
1015                 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
1016 #endif
1017                 SETVALUE("basereachable", ND.basereachable);
1018                 SETVALUE("retrans", ND.retrans);
1019                 SETVALUE("curhlim", ND.chlim);
1020
1021                 ND.flags = newflags;
1022                 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
1023                         err(1, "ioctl(SIOCSIFINFO_IN6)");
1024                         /* NOTREACHED */
1025                 }
1026 #undef SETFLAG
1027 #undef SETVALUE
1028         }
1029
1030         if (!ND.initialized) {
1031                 errx(1, "%s: not initialized yet", ifname);
1032                 /* NOTREACHED */
1033         }
1034
1035         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1036                 err(1, "ioctl(SIOCGIFINFO_IN6)");
1037                 /* NOTREACHED */
1038         }
1039         printf("linkmtu=%d", ND.linkmtu);
1040         printf(", maxmtu=%d", ND.maxmtu);
1041         printf(", curhlim=%d", ND.chlim);
1042         printf(", basereachable=%ds%dms",
1043             ND.basereachable / 1000, ND.basereachable % 1000);
1044         printf(", reachable=%ds", ND.reachable);
1045         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1046 #ifdef IPV6CTL_USETEMPADDR
1047         memset(nullbuf, 0, sizeof(nullbuf));
1048         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1049                 int j;
1050                 u_int8_t *rbuf;
1051
1052                 for (i = 0; i < 3; i++) {
1053                         switch (i) {
1054                         case 0:
1055                                 printf("\nRandom seed(0): ");
1056                                 rbuf = ND.randomseed0;
1057                                 break;
1058                         case 1:
1059                                 printf("\nRandom seed(1): ");
1060                                 rbuf = ND.randomseed1;
1061                                 break;
1062                         case 2:
1063                                 printf("\nRandom ID:      ");
1064                                 rbuf = ND.randomid;
1065                                 break;
1066                         default:
1067                                 errx(1, "impossible case for tempaddr display");
1068                         }
1069                         for (j = 0; j < 8; j++)
1070                                 printf("%02x", rbuf[j]);
1071                 }
1072         }
1073 #endif
1074         if (ND.flags) {
1075                 printf("\nFlags: ");
1076 #ifdef ND6_IFF_IFDISABLED
1077                 if ((ND.flags & ND6_IFF_IFDISABLED))
1078                         printf("disabled ");
1079 #endif
1080                 if ((ND.flags & ND6_IFF_PERFORMNUD))
1081                         printf("nud ");
1082 #ifdef ND6_IFF_ACCEPT_RTADV
1083                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1084                         printf("accept_rtadv ");
1085 #endif
1086 #ifdef ND6_IFF_AUTO_LINKLOCAL
1087                 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1088                         printf("auto_linklocal ");
1089 #endif
1090 #ifdef ND6_IFF_PREFER_SOURCE
1091                 if ((ND.flags & ND6_IFF_PREFER_SOURCE))
1092                         printf("prefer_source ");
1093 #endif
1094 #ifdef ND6_IFF_NO_PREFER_IFACE
1095                 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1096                         printf("no_prefer_iface ");
1097 #endif
1098         }
1099         putc('\n', stdout);
1100 #undef ND
1101
1102         close(s);
1103 }
1104
1105 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1106 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1107 #endif
1108
1109 void
1110 rtrlist()
1111 {
1112 #ifdef ICMPV6CTL_ND6_DRLIST
1113         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1114         char *buf;
1115         struct in6_defrouter *p, *ep;
1116         size_t l;
1117         struct timeval time;
1118
1119         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1120                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1121                 /*NOTREACHED*/
1122         }
1123         if (l == 0)
1124                 return;
1125         buf = malloc(l);
1126         if (!buf) {
1127                 err(1, "malloc");
1128                 /*NOTREACHED*/
1129         }
1130         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1131                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1132                 /*NOTREACHED*/
1133         }
1134
1135         ep = (struct in6_defrouter *)(buf + l);
1136         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1137                 int rtpref;
1138
1139                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1140                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1141                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1142                         strlcpy(host_buf, "?", sizeof(host_buf));
1143
1144                 printf("%s if=%s", host_buf,
1145                     if_indextoname(p->if_index, ifix_buf));
1146                 printf(", flags=%s%s",
1147                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1148                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1149                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1150                 printf(", pref=%s", rtpref_str[rtpref]);
1151
1152                 gettimeofday(&time, 0);
1153                 if (p->expire == 0)
1154                         printf(", expire=Never\n");
1155                 else
1156                         printf(", expire=%s\n",
1157                             sec2str(p->expire - time.tv_sec));
1158         }
1159         free(buf);
1160 #else
1161         struct in6_drlist dr;
1162         int s, i;
1163         struct timeval time;
1164
1165         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1166                 err(1, "socket");
1167                 /* NOTREACHED */
1168         }
1169         bzero(&dr, sizeof(dr));
1170         strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1171         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1172                 err(1, "ioctl(SIOCGDRLST_IN6)");
1173                 /* NOTREACHED */
1174         }
1175 #define DR dr.defrouter[i]
1176         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1177                 struct sockaddr_in6 sin6;
1178
1179                 bzero(&sin6, sizeof(sin6));
1180                 sin6.sin6_family = AF_INET6;
1181                 sin6.sin6_len = sizeof(sin6);
1182                 sin6.sin6_addr = DR.rtaddr;
1183                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1184                     sizeof(host_buf), NULL, 0,
1185                     (nflag ? NI_NUMERICHOST : 0));
1186
1187                 printf("%s if=%s", host_buf,
1188                     if_indextoname(DR.if_index, ifix_buf));
1189                 printf(", flags=%s%s",
1190                     DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1191                     DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1192                 gettimeofday(&time, 0);
1193                 if (DR.expire == 0)
1194                         printf(", expire=Never\n");
1195                 else
1196                         printf(", expire=%s\n",
1197                             sec2str(DR.expire - time.tv_sec));
1198         }
1199 #undef DR
1200         close(s);
1201 #endif
1202 }
1203
1204 void
1205 plist()
1206 {
1207 #ifdef ICMPV6CTL_ND6_PRLIST
1208         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1209         char *buf;
1210         struct in6_prefix *p, *ep, *n;
1211         struct sockaddr_in6 *advrtr;
1212         size_t l;
1213         struct timeval time;
1214         const int niflags = NI_NUMERICHOST;
1215         int ninflags = nflag ? NI_NUMERICHOST : 0;
1216         char namebuf[NI_MAXHOST];
1217
1218         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1219                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1220                 /*NOTREACHED*/
1221         }
1222         buf = malloc(l);
1223         if (!buf) {
1224                 err(1, "malloc");
1225                 /*NOTREACHED*/
1226         }
1227         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1228                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1229                 /*NOTREACHED*/
1230         }
1231
1232         ep = (struct in6_prefix *)(buf + l);
1233         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1234                 advrtr = (struct sockaddr_in6 *)(p + 1);
1235                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1236
1237                 if (getnameinfo((struct sockaddr *)&p->prefix,
1238                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1239                     NULL, 0, niflags) != 0)
1240                         strlcpy(namebuf, "?", sizeof(namebuf));
1241                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1242                     if_indextoname(p->if_index, ifix_buf));
1243
1244                 gettimeofday(&time, 0);
1245                 /*
1246                  * meaning of fields, especially flags, is very different
1247                  * by origin.  notify the difference to the users.
1248                  */
1249                 printf("flags=%s%s%s%s%s",
1250                     p->raflags.onlink ? "L" : "",
1251                     p->raflags.autonomous ? "A" : "",
1252                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1253                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1254 #ifdef NDPRF_HOME
1255                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1256 #else
1257                     ""
1258 #endif
1259                     );
1260                 if (p->vltime == ND6_INFINITE_LIFETIME)
1261                         printf(" vltime=infinity");
1262                 else
1263                         printf(" vltime=%lu", (unsigned long)p->vltime);
1264                 if (p->pltime == ND6_INFINITE_LIFETIME)
1265                         printf(", pltime=infinity");
1266                 else
1267                         printf(", pltime=%lu", (unsigned long)p->pltime);
1268                 if (p->expire == 0)
1269                         printf(", expire=Never");
1270                 else if (p->expire >= time.tv_sec)
1271                         printf(", expire=%s",
1272                             sec2str(p->expire - time.tv_sec));
1273                 else
1274                         printf(", expired");
1275                 printf(", ref=%d", p->refcnt);
1276                 printf("\n");
1277                 /*
1278                  * "advertising router" list is meaningful only if the prefix
1279                  * information is from RA.
1280                  */
1281                 if (p->advrtrs) {
1282                         int j;
1283                         struct sockaddr_in6 *sin6;
1284
1285                         sin6 = advrtr;
1286                         printf("  advertised by\n");
1287                         for (j = 0; j < p->advrtrs; j++) {
1288                                 struct in6_nbrinfo *nbi;
1289
1290                                 if (getnameinfo((struct sockaddr *)sin6,
1291                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1292                                     NULL, 0, ninflags) != 0)
1293                                         strlcpy(namebuf, "?", sizeof(namebuf));
1294                                 printf("    %s", namebuf);
1295
1296                                 nbi = getnbrinfo(&sin6->sin6_addr,
1297                                     p->if_index, 0);
1298                                 if (nbi) {
1299                                         switch (nbi->state) {
1300                                         case ND6_LLINFO_REACHABLE:
1301                                         case ND6_LLINFO_STALE:
1302                                         case ND6_LLINFO_DELAY:
1303                                         case ND6_LLINFO_PROBE:
1304                                                 printf(" (reachable)\n");
1305                                                 break;
1306                                         default:
1307                                                 printf(" (unreachable)\n");
1308                                         }
1309                                 } else
1310                                         printf(" (no neighbor state)\n");
1311                                 sin6++;
1312                         }
1313                 } else
1314                         printf("  No advertising router\n");
1315         }
1316         free(buf);
1317 #else
1318         struct in6_prlist pr;
1319         int s, i;
1320         struct timeval time;
1321
1322         gettimeofday(&time, 0);
1323
1324         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1325                 err(1, "socket");
1326                 /* NOTREACHED */
1327         }
1328         bzero(&pr, sizeof(pr));
1329         strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1330         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1331                 err(1, "ioctl(SIOCGPRLST_IN6)");
1332                 /* NOTREACHED */
1333         }
1334 #define PR pr.prefix[i]
1335         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1336                 struct sockaddr_in6 p6;
1337                 char namebuf[NI_MAXHOST];
1338                 int niflags;
1339
1340 #ifdef NDPRF_ONLINK
1341                 p6 = PR.prefix;
1342 #else
1343                 memset(&p6, 0, sizeof(p6));
1344                 p6.sin6_family = AF_INET6;
1345                 p6.sin6_len = sizeof(p6);
1346                 p6.sin6_addr = PR.prefix;
1347 #endif
1348
1349                 /*
1350                  * copy link index to sin6_scope_id field.
1351                  * XXX: KAME specific.
1352                  */
1353                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1354                         u_int16_t linkid;
1355
1356                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1357                             sizeof(linkid));
1358                         linkid = ntohs(linkid);
1359                         p6.sin6_scope_id = linkid;
1360                         p6.sin6_addr.s6_addr[2] = 0;
1361                         p6.sin6_addr.s6_addr[3] = 0;
1362                 }
1363
1364                 niflags = NI_NUMERICHOST;
1365                 if (getnameinfo((struct sockaddr *)&p6,
1366                     sizeof(p6), namebuf, sizeof(namebuf),
1367                     NULL, 0, niflags)) {
1368                         warnx("getnameinfo failed");
1369                         continue;
1370                 }
1371                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1372                     if_indextoname(PR.if_index, ifix_buf));
1373
1374                 gettimeofday(&time, 0);
1375                 /*
1376                  * meaning of fields, especially flags, is very different
1377                  * by origin.  notify the difference to the users.
1378                  */
1379 #if 0
1380                 printf("  %s",
1381                     PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1382 #endif
1383 #ifdef NDPRF_ONLINK
1384                 printf("flags=%s%s%s%s%s",
1385                     PR.raflags.onlink ? "L" : "",
1386                     PR.raflags.autonomous ? "A" : "",
1387                     (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1388                     (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1389 #ifdef NDPRF_HOME
1390                     (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1391 #else
1392                     ""
1393 #endif
1394                     );
1395 #else
1396                 printf("flags=%s%s",
1397                     PR.raflags.onlink ? "L" : "",
1398                     PR.raflags.autonomous ? "A" : "");
1399 #endif
1400                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1401                         printf(" vltime=infinity");
1402                 else
1403                         printf(" vltime=%lu", PR.vltime);
1404                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1405                         printf(", pltime=infinity");
1406                 else
1407                         printf(", pltime=%lu", PR.pltime);
1408                 if (PR.expire == 0)
1409                         printf(", expire=Never");
1410                 else if (PR.expire >= time.tv_sec)
1411                         printf(", expire=%s",
1412                             sec2str(PR.expire - time.tv_sec));
1413                 else
1414                         printf(", expired");
1415 #ifdef NDPRF_ONLINK
1416                 printf(", ref=%d", PR.refcnt);
1417 #endif
1418 #if 0
1419                 switch (PR.origin) {
1420                 case PR_ORIG_RA:
1421                         printf(", origin=RA");
1422                         break;
1423                 case PR_ORIG_RR:
1424                         printf(", origin=RR");
1425                         break;
1426                 case PR_ORIG_STATIC:
1427                         printf(", origin=static");
1428                         break;
1429                 case PR_ORIG_KERNEL:
1430                         printf(", origin=kernel");
1431                         break;
1432                 default:
1433                         printf(", origin=?");
1434                         break;
1435                 }
1436 #endif
1437                 printf("\n");
1438                 /*
1439                  * "advertising router" list is meaningful only if the prefix
1440                  * information is from RA.
1441                  */
1442                 if (0 &&        /* prefix origin is almost obsolted */
1443                     PR.origin != PR_ORIG_RA)
1444                         ;
1445                 else if (PR.advrtrs) {
1446                         int j;
1447                         printf("  advertised by\n");
1448                         for (j = 0; j < PR.advrtrs; j++) {
1449                                 struct sockaddr_in6 sin6;
1450                                 struct in6_nbrinfo *nbi;
1451
1452                                 bzero(&sin6, sizeof(sin6));
1453                                 sin6.sin6_family = AF_INET6;
1454                                 sin6.sin6_len = sizeof(sin6);
1455                                 sin6.sin6_addr = PR.advrtr[j];
1456                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1457                                 getnameinfo((struct sockaddr *)&sin6,
1458                                     sin6.sin6_len, host_buf,
1459                                     sizeof(host_buf), NULL, 0,
1460                                     (nflag ? NI_NUMERICHOST : 0));
1461                                 printf("    %s", host_buf);
1462
1463                                 nbi = getnbrinfo(&sin6.sin6_addr,
1464                                     PR.if_index, 0);
1465                                 if (nbi) {
1466                                         switch (nbi->state) {
1467                                         case ND6_LLINFO_REACHABLE:
1468                                         case ND6_LLINFO_STALE:
1469                                         case ND6_LLINFO_DELAY:
1470                                         case ND6_LLINFO_PROBE:
1471                                                  printf(" (reachable)\n");
1472                                                  break;
1473                                         default:
1474                                                  printf(" (unreachable)\n");
1475                                         }
1476                                 } else
1477                                         printf(" (no neighbor state)\n");
1478                         }
1479                         if (PR.advrtrs > DRLSTSIZ)
1480                                 printf("    and %d routers\n",
1481                                     PR.advrtrs - DRLSTSIZ);
1482                 } else
1483                         printf("  No advertising router\n");
1484         }
1485 #undef PR
1486         close(s);
1487 #endif
1488 }
1489
1490 void
1491 pfx_flush()
1492 {
1493         char dummyif[IFNAMSIZ+8];
1494         int s;
1495
1496         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1497                 err(1, "socket");
1498         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1499         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1500                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1501 }
1502
1503 void
1504 rtr_flush()
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, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1513                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1514
1515         close(s);
1516 }
1517
1518 void
1519 harmonize_rtr()
1520 {
1521         char dummyif[IFNAMSIZ+8];
1522         int s;
1523
1524         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1525                 err(1, "socket");
1526         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1527         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1528                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1529
1530         close(s);
1531 }
1532
1533 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1534 static void
1535 setdefif(ifname)
1536         char *ifname;
1537 {
1538         struct in6_ndifreq ndifreq;
1539         unsigned int ifindex;
1540
1541         if (strcasecmp(ifname, "delete") == 0)
1542                 ifindex = 0;
1543         else {
1544                 if ((ifindex = if_nametoindex(ifname)) == 0)
1545                         err(1, "failed to resolve i/f index for %s", ifname);
1546         }
1547
1548         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1549                 err(1, "socket");
1550
1551         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1552         ndifreq.ifindex = ifindex;
1553
1554         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1555                 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1556
1557         close(s);
1558 }
1559
1560 static void
1561 getdefif()
1562 {
1563         struct in6_ndifreq ndifreq;
1564         char ifname[IFNAMSIZ+8];
1565
1566         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1567                 err(1, "socket");
1568
1569         memset(&ndifreq, 0, sizeof(ndifreq));
1570         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1571
1572         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1573                 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1574
1575         if (ndifreq.ifindex == 0)
1576                 printf("No default interface.\n");
1577         else {
1578                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1579                         err(1, "failed to resolve ifname for index %lu",
1580                             ndifreq.ifindex);
1581                 printf("ND default interface = %s\n", ifname);
1582         }
1583
1584         close(s);
1585 }
1586 #endif
1587
1588 static char *
1589 sec2str(total)
1590         time_t total;
1591 {
1592         static char result[256];
1593         int days, hours, mins, secs;
1594         int first = 1;
1595         char *p = result;
1596         char *ep = &result[sizeof(result)];
1597         int n;
1598
1599         days = total / 3600 / 24;
1600         hours = (total / 3600) % 24;
1601         mins = (total / 60) % 60;
1602         secs = total % 60;
1603
1604         if (days) {
1605                 first = 0;
1606                 n = snprintf(p, ep - p, "%dd", days);
1607                 if (n < 0 || n >= ep - p)
1608                         return "?";
1609                 p += n;
1610         }
1611         if (!first || hours) {
1612                 first = 0;
1613                 n = snprintf(p, ep - p, "%dh", hours);
1614                 if (n < 0 || n >= ep - p)
1615                         return "?";
1616                 p += n;
1617         }
1618         if (!first || mins) {
1619                 first = 0;
1620                 n = snprintf(p, ep - p, "%dm", mins);
1621                 if (n < 0 || n >= ep - p)
1622                         return "?";
1623                 p += n;
1624         }
1625         snprintf(p, ep - p, "%ds", secs);
1626
1627         return(result);
1628 }
1629
1630 /*
1631  * Print the timestamp
1632  * from tcpdump/util.c
1633  */
1634 static void
1635 ts_print(tvp)
1636         const struct timeval *tvp;
1637 {
1638         int s;
1639
1640         /* Default */
1641         s = (tvp->tv_sec + thiszone) % 86400;
1642         (void)printf("%02d:%02d:%02d.%06u ",
1643             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1644 }
1645
1646 #undef NEXTADDR