usr.sbin/ndp/ndp.c

   1 /*      $FreeBSD: src/usr.sbin/ndp/ndp.c,v 1.2.2.5 2001/08/13 02:58:26 sumikawa Exp $   */
   2 /*      $KAME: ndp.c,v 1.65 2001/05/08 04:36:34 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  * 3. All advertising materials mentioning features or use of this software
  48  *    must display the following acknowledgement:
  49  *      This product includes software developed by the University of
  50  *      California, Berkeley and its contributors.
  51  * 4. Neither the name of the University nor the names of its contributors
  52  *    may be used to endorse or promote products derived from this software
  53  *    without specific prior written permission.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  65  * SUCH DAMAGE.
  66  */
  67
  68 /*
  69  * Based on:
  70  * "@(#) Copyright (c) 1984, 1993\n\
  71  *      The Regents of the University of California.  All rights reserved.\n";
  72  *
  73  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  74  */
  75
  76 /*
  77  * ndp - display, set, delete and flush neighbor cache
  78  */
  79
  80
  81 #include <sys/param.h>
  82 #include <sys/file.h>
  83 #include <sys/ioctl.h>
  84 #include <sys/socket.h>
  85 #include <sys/sysctl.h>
  86 #include <sys/time.h>
  87 #include <sys/queue.h>
  88
  89 #include <net/if.h>
  90 #include <net/if_var.h>
  91 #include <net/if_dl.h>
  92 #include <net/if_types.h>
  93 #include <net/route.h>
  94
  95 #include <netinet/in.h>
  96 #include <netinet/if_ether.h>
  97
  98 #include <netinet/icmp6.h>
  99 #include <netinet6/in6_var.h>
 100 #include <netinet6/nd6.h>
 101
 102 #include <arpa/inet.h>
 103
 104 #include <netdb.h>
 105 #include <errno.h>
 106 #include <nlist.h>
 107 #include <stdio.h>
 108 #include <string.h>
 109 #include <paths.h>
 110 #include <err.h>
 111 #include <stdlib.h>
 112 #include <fcntl.h>
 113 #include <unistd.h>
 114 #include "gmt2local.h"
 115
 116 #ifndef NI_WITHSCOPEID
 117 #define NI_WITHSCOPEID  0
 118 #endif
 119
 120 /* packing rule for routing socket */
 121 #define ROUNDUP(a) \
 122         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 123 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 124
 125 static int pid;
 126 static int cflag;
 127 static int nflag;
 128 static int tflag;
 129 static int32_t thiszone;        /* time difference with gmt */
 130 static int s = -1;
 131 static int repeat = 0;
 132
 133 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 134 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 135 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 136
 137 int main __P((int, char **));
 138 int file __P((char *));
 139 void getsocket __P((void));
 140 int set __P((int, char **));
 141 void get __P((char *));
 142 int delete __P((char *));
 143 void dump __P((struct in6_addr *));
 144 static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *addr,
 145                                            int ifindex, int));
 146 static char *ether_str __P((struct sockaddr_dl *));
 147 int ndp_ether_aton __P((char *, u_char *));
 148 void usage __P((void));
 149 int rtmsg __P((int));
 150 void ifinfo __P((int, char **));
 151 void rtrlist __P((void));
 152 void plist __P((void));
 153 void pfx_flush __P((void));
 154 void rtrlist __P((void));
 155 void rtr_flush __P((void));
 156 void harmonize_rtr __P((void));
 157 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 158 static void getdefif __P((void));
 159 static void setdefif __P((char *));
 160 #endif
 161 static char *sec2str __P((time_t t));
 162 static char *ether_str __P((struct sockaddr_dl *sdl));
 163 static void ts_print __P((const struct timeval *));
 164
 165 static char *rtpref_str[] = {
 166         "medium",               /* 00 */
 167         "high",                 /* 01 */
 168         "rsv",                  /* 10 */
 169         "low"                   /* 11 */
 170 };
 171
 172 int
 173 main(argc, argv)
 174         int argc;
 175         char **argv;
 176 {
 177         int ch;
 178         int aflag = 0, dflag = 0, sflag = 0, Hflag = 0,
 179                 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
 180
 181         pid = getpid();
 182         thiszone = gmt2local(0);
 183         while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != -1)
 184                 switch ((char)ch) {
 185                 case 'a':
 186                         aflag = 1;
 187                         break;
 188                 case 'c':
 189                         cflag = 1;
 190                         break;
 191                 case 'd':
 192                         dflag = 1;
 193                         break;
 194                 case 'I':
 195 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 196                         if (argc > 2)
 197                                 setdefif(argv[2]);
 198                         getdefif(); /* always call it to print the result */
 199                         exit(0);
 200 #else
 201                         errx(1, "not supported yet");
 202                         /*NOTREACHED*/
 203 #endif
 204                 case 'i' :
 205                         argc -= optind;
 206                         argv += optind;
 207                         if (argc < 1)
 208                                 usage();
 209                         ifinfo(argc, argv);
 210                         exit(0);
 211                 case 'n':
 212                         nflag = 1;
 213                         continue;
 214                 case 'p':
 215                         pflag = 1;
 216                         break;
 217                 case 'f' :
 218                         if (argc != 3)
 219                                 usage();
 220                         file(argv[2]);
 221                         exit(0);
 222                 case 'l' :
 223                         /* obsolete, ignored */
 224                         break;
 225                 case 'r' :
 226                         rflag = 1;
 227                         break;
 228                 case 's':
 229                         sflag = 1;
 230                         break;
 231                 case 't':
 232                         tflag = 1;
 233                         break;
 234                 case 'A':
 235                         aflag = 1;
 236                         repeat = atoi(optarg);
 237                         if (repeat < 0)
 238                                 usage();
 239                         break;
 240                 case 'H' :
 241                         Hflag = 1;
 242                         break;
 243                 case 'P':
 244                         Pflag = 1;
 245                         break;
 246                 case 'R':
 247                         Rflag = 1;
 248                         break;
 249                 default:
 250                         usage();
 251                 }
 252
 253         argc -= optind;
 254         argv += optind;
 255
 256         if (aflag || cflag) {
 257                 dump(0);
 258                 exit(0);
 259         }
 260         if (dflag) {
 261                 if (argc != 1)
 262                         usage();
 263                 delete(argv[0]);
 264                 exit(0);
 265         }
 266         if (pflag) {
 267                 plist();
 268                 exit(0);
 269         }
 270         if (rflag) {
 271                 rtrlist();
 272                 exit(0);
 273         }
 274         if (sflag) {
 275                 if (argc < 2 || argc > 4)
 276                         usage();
 277                 exit(set(argc, argv) ? 1 : 0);
 278         }
 279         if (Hflag) {
 280                 harmonize_rtr();
 281                 exit(0);
 282         }
 283         if (Pflag) {
 284                 pfx_flush();
 285                 exit(0);
 286         }
 287         if (Rflag) {
 288                 rtr_flush();
 289                 exit(0);
 290         }
 291
 292         if (argc != 1)
 293                 usage();
 294         get(argv[0]);
 295         exit(0);
 296 }
 297
 298 /*
 299  * Process a file to set standard ndp entries
 300  */
 301 int
 302 file(name)
 303         char *name;
 304 {
 305         FILE *fp;
 306         int i, retval;
 307         char line[100], arg[5][50], *args[5];
 308
 309         if ((fp = fopen(name, "r")) == NULL) {
 310                 fprintf(stderr, "ndp: cannot open %s\n", name);
 311                 exit(1);
 312         }
 313         args[0] = &arg[0][0];
 314         args[1] = &arg[1][0];
 315         args[2] = &arg[2][0];
 316         args[3] = &arg[3][0];
 317         args[4] = &arg[4][0];
 318         retval = 0;
 319         while(fgets(line, 100, fp) != NULL) {
 320                 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
 321                     arg[3], arg[4]);
 322                 if (i < 2) {
 323                         fprintf(stderr, "ndp: bad line: %s\n", line);
 324                         retval = 1;
 325                         continue;
 326                 }
 327                 if (set(i, args))
 328                         retval = 1;
 329         }
 330         fclose(fp);
 331         return (retval);
 332 }
 333
 334 void
 335 getsocket()
 336 {
 337         if (s < 0) {
 338                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 339                 if (s < 0) {
 340                         perror("ndp: socket");
 341                         exit(1);
 342                 }
 343         }
 344 }
 345
 346 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 347 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 348 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 349 int     expire_time, flags, found_entry;
 350 struct  {
 351         struct  rt_msghdr m_rtm;
 352         char    m_space[512];
 353 }       m_rtmsg;
 354
 355 /*
 356  * Set an individual neighbor cache entry
 357  */
 358 int
 359 set(argc, argv)
 360         int argc;
 361         char **argv;
 362 {
 363         register struct sockaddr_in6 *sin = &sin_m;
 364         register struct sockaddr_dl *sdl;
 365         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 366         struct addrinfo hints, *res;
 367         int gai_error;
 368         u_char *ea;
 369         char *host = argv[0], *eaddr = argv[1];
 370
 371         getsocket();
 372         argc -= 2;
 373         argv += 2;
 374         sdl_m = blank_sdl;
 375         sin_m = blank_sin;
 376
 377         bzero(&hints, sizeof(hints));
 378         hints.ai_family = AF_INET6;
 379         gai_error = getaddrinfo(host, NULL, &hints, &res);
 380         if (gai_error) {
 381                 fprintf(stderr, "ndp: %s: %s\n", host,
 382                         gai_strerror(gai_error));
 383                 return 1;
 384         }
 385         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 386 #ifdef __KAME__
 387         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 388                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 389                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 390         }
 391 #endif
 392         ea = (u_char *)LLADDR(&sdl_m);
 393         if (ndp_ether_aton(eaddr, ea) == 0)
 394                 sdl_m.sdl_alen = 6;
 395         flags = expire_time = 0;
 396         while (argc-- > 0) {
 397                 if (strncmp(argv[0], "temp", 4) == 0) {
 398                         struct timeval time;
 399                         gettimeofday(&time, 0);
 400                         expire_time = time.tv_sec + 20 * 60;
 401                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 402                         flags |= RTF_ANNOUNCE;
 403                 argv++;
 404         }
 405         if (rtmsg(RTM_GET) < 0) {
 406                 perror(host);
 407                 return (1);
 408         }
 409         sin = (struct sockaddr_in6 *)(rtm + 1);
 410         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 411         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 412                 if (sdl->sdl_family == AF_LINK &&
 413                     (rtm->rtm_flags & RTF_LLINFO) &&
 414                     !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
 415                 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 416                 case IFT_ISO88024: case IFT_ISO88025:
 417                         goto overwrite;
 418                 }
 419                 /*
 420                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 421                  */
 422                 fprintf(stderr, "set: cannot configure a new entry\n");
 423                 return 1;
 424         }
 425
 426 overwrite:
 427         if (sdl->sdl_family != AF_LINK) {
 428                 printf("cannot intuit interface index and type for %s\n", host);
 429                 return (1);
 430         }
 431         sdl_m.sdl_type = sdl->sdl_type;
 432         sdl_m.sdl_index = sdl->sdl_index;
 433         return (rtmsg(RTM_ADD));
 434 }
 435
 436 /*
 437  * Display an individual neighbor cache entry
 438  */
 439 void
 440 get(host)
 441         char *host;
 442 {
 443         struct sockaddr_in6 *sin = &sin_m;
 444         struct addrinfo hints, *res;
 445         int gai_error;
 446
 447         sin_m = blank_sin;
 448         bzero(&hints, sizeof(hints));
 449         hints.ai_family = AF_INET6;
 450         gai_error = getaddrinfo(host, NULL, &hints, &res);
 451         if (gai_error) {
 452                 fprintf(stderr, "ndp: %s: %s\n", host,
 453                         gai_strerror(gai_error));
 454                 return;
 455         }
 456         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 457 #ifdef __KAME__
 458         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 459                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 460                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 461         }
 462 #endif
 463         dump(&sin->sin6_addr);
 464         if (found_entry == 0) {
 465                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 466                             sizeof(host_buf), NULL ,0,
 467                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 468                 printf("%s (%s) -- no entry\n", host, host_buf);
 469                 exit(1);
 470         }
 471 }
 472
 473 /*
 474  * Delete a neighbor cache entry
 475  */
 476 int
 477 delete(host)
 478         char *host;
 479 {
 480         struct sockaddr_in6 *sin = &sin_m;
 481         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 482         struct sockaddr_dl *sdl;
 483         struct addrinfo hints, *res;
 484         int gai_error;
 485
 486         getsocket();
 487         sin_m = blank_sin;
 488
 489         bzero(&hints, sizeof(hints));
 490         hints.ai_family = AF_INET6;
 491         gai_error = getaddrinfo(host, NULL, &hints, &res);
 492         if (gai_error) {
 493                 fprintf(stderr, "ndp: %s: %s\n", host,
 494                         gai_strerror(gai_error));
 495                 return 1;
 496         }
 497         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 498 #ifdef __KAME__
 499         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 500                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 501                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 502         }
 503 #endif
 504         if (rtmsg(RTM_GET) < 0) {
 505                 perror(host);
 506                 return (1);
 507         }
 508         sin = (struct sockaddr_in6 *)(rtm + 1);
 509         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 510         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 511                 if (sdl->sdl_family == AF_LINK &&
 512                     (rtm->rtm_flags & RTF_LLINFO) &&
 513                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 514                         goto delete;
 515                 }
 516                 /*
 517                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 518                  */
 519                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 520                 return 1;
 521         }
 522
 523 delete:
 524         if (sdl->sdl_family != AF_LINK) {
 525                 printf("cannot locate %s\n", host);
 526                 return (1);
 527         }
 528         if (rtmsg(RTM_DELETE) == 0) {
 529                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 530
 531 #ifdef __KAME__
 532                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 533                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 534                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 535                 }
 536 #endif
 537                 getnameinfo((struct sockaddr *)&s6,
 538                             s6.sin6_len, host_buf,
 539                             sizeof(host_buf), NULL, 0,
 540                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 541                 printf("%s (%s) deleted\n", host, host_buf);
 542         }
 543
 544         return 0;
 545 }
 546
 547 #define W_ADDR  31
 548 #define W_LL    17
 549 #define W_IF    6
 550
 551 /*
 552  * Dump the entire neighbor cache
 553  */
 554 void
 555 dump(addr)
 556         struct in6_addr *addr;
 557 {
 558         int mib[6];
 559         size_t needed;
 560         char *lim, *buf, *next;
 561         struct rt_msghdr *rtm;
 562         struct sockaddr_in6 *sin;
 563         struct sockaddr_dl *sdl;
 564         extern int h_errno;
 565         struct in6_nbrinfo *nbi;
 566         struct timeval time;
 567         int addrwidth;
 568         int llwidth;
 569         int ifwidth;
 570         char flgbuf[8];
 571         char *ifname;
 572
 573         /* Print header */
 574         if (!tflag && !cflag)
 575                 printf("%-*.*s %-*.*s %*.*s %-9.9s %2s %4s %4s\n",
 576                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 577                     W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs");
 578
 579 again:;
 580         mib[0] = CTL_NET;
 581         mib[1] = PF_ROUTE;
 582         mib[2] = 0;
 583         mib[3] = AF_INET6;
 584         mib[4] = NET_RT_FLAGS;
 585         mib[5] = RTF_LLINFO;
 586         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 587                 err(1, "sysctl(PF_ROUTE estimate)");
 588         if (needed > 0) {
 589                 if ((buf = malloc(needed)) == NULL)
 590                         errx(1, "malloc");
 591                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 592                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 593                 lim = buf + needed;
 594         } else
 595                 buf = lim = NULL;
 596
 597         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 598                 int isrouter = 0, prbs = 0;
 599
 600                 rtm = (struct rt_msghdr *)next;
 601                 sin = (struct sockaddr_in6 *)(rtm + 1);
 602                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 603
 604                 /*
 605                  * Some OSes can produce a route that has the LINK flag but
 606                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 607                  * and BSD/OS, where xx is not the interface identifier on
 608                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 609                  * so we skip them.
 610                  * XXX: such routes should have the GATEWAY flag, not the
 611                  * LINK flag.  However, there are rotten routing software
 612                  * that advertises all routes that have the GATEWAY flag.
 613                  * Thus, KAME kernel intentionally does not set the LINK flag.
 614                  * What is to be fixed is not ndp, but such routing software
 615                  * (and the kernel workaround)...
 616                  */
 617                 if (sdl->sdl_family != AF_LINK)
 618                         continue;
 619
 620                 if (addr) {
 621                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 622                                 continue;
 623                         found_entry = 1;
 624                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 625                         continue;
 626                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 627                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 628                         /* XXX: should scope id be filled in the kernel? */
 629                         if (sin->sin6_scope_id == 0)
 630                                 sin->sin6_scope_id = sdl->sdl_index;
 631 #ifdef __KAME__
 632                         /* KAME specific hack; removed the embedded id */
 633                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 634 #endif
 635                 }
 636                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 637                             sizeof(host_buf), NULL, 0,
 638                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 639                 if (cflag == 1) {
 640 #ifdef RTF_WASCLONED
 641                         if (rtm->rtm_flags & RTF_WASCLONED)
 642                                 delete(host_buf);
 643 #else
 644                         delete(host_buf);
 645 #endif
 646                         continue;
 647                 }
 648                 gettimeofday(&time, 0);
 649                 if (tflag)
 650                         ts_print(&time);
 651
 652                 addrwidth = strlen(host_buf);
 653                 if (addrwidth < W_ADDR)
 654                         addrwidth = W_ADDR;
 655                 llwidth = strlen(ether_str(sdl));
 656                 if (W_ADDR + W_LL - addrwidth > llwidth)
 657                         llwidth = W_ADDR + W_LL - addrwidth;
 658                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 659                 if (!ifname)
 660                         ifname = "?";
 661                 ifwidth = strlen(ifname);
 662                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 663                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 664
 665                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 666                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 667
 668                 /* Print neighbor discovery specific informations */
 669                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 670                 if (nbi) {
 671                         if (nbi->expire > time.tv_sec) {
 672                                 printf(" %-9.9s",
 673                                        sec2str(nbi->expire - time.tv_sec));
 674                         } else if (nbi->expire == 0)
 675                                 printf(" %-9.9s", "permanent");
 676                         else
 677                                 printf(" %-9.9s", "expired");
 678
 679                         switch(nbi->state) {
 680                          case ND6_LLINFO_NOSTATE:
 681                                  printf(" N");
 682                                  break;
 683 #ifdef ND6_LLINFO_WAITDELETE
 684                          case ND6_LLINFO_WAITDELETE:
 685                                  printf(" W");
 686                                  break;
 687 #endif
 688                          case ND6_LLINFO_INCOMPLETE:
 689                                  printf(" I");
 690                                  break;
 691                          case ND6_LLINFO_REACHABLE:
 692                                  printf(" R");
 693                                  break;
 694                          case ND6_LLINFO_STALE:
 695                                  printf(" S");
 696                                  break;
 697                          case ND6_LLINFO_DELAY:
 698                                  printf(" D");
 699                                  break;
 700                          case ND6_LLINFO_PROBE:
 701                                  printf(" P");
 702                                  break;
 703                          default:
 704                                  printf(" ?");
 705                                  break;
 706                         }
 707
 708                         isrouter = nbi->isrouter;
 709                         prbs = nbi->asked;
 710                 } else {
 711                         warnx("failed to get neighbor information");
 712                         printf("  ");
 713                 }
 714                 putchar(' ');
 715
 716                 /*
 717                  * other flags. R: router, P: proxy, W: ??
 718                  */
 719                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 720                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 721                                 isrouter ? "R" : "",
 722                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 723                 } else {
 724                         sin = (struct sockaddr_in6 *)
 725                                 (sdl->sdl_len + (char *)sdl);
 726                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 727                                 isrouter ? "R" : "",
 728                                 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr)
 729                                         ? "P" : "",
 730                                 (sin->sin6_len != sizeof(struct sockaddr_in6))
 731                                         ? "W" : "",
 732                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 733                 }
 734                 printf(" %-4.4s", flgbuf);
 735
 736                 if (prbs)
 737                         printf(" %4d", prbs);
 738
 739                 printf("\n");
 740         }
 741         if (buf != NULL)
 742                 free(buf);
 743
 744         if (repeat) {
 745                 printf("\n");
 746                 sleep(repeat);
 747                 goto again;
 748         }
 749 }
 750
 751 static struct in6_nbrinfo *
 752 getnbrinfo(addr, ifindex, warning)
 753         struct in6_addr *addr;
 754         int ifindex;
 755         int warning;
 756 {
 757         static struct in6_nbrinfo nbi;
 758         int s;
 759
 760         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 761                 err(1, "socket");
 762
 763         bzero(&nbi, sizeof(nbi));
 764         if_indextoname(ifindex, nbi.ifname);
 765         nbi.addr = *addr;
 766         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 767                 if (warning)
 768                         warn("ioctl(SIOCGNBRINFO_IN6)");
 769                 close(s);
 770                 return(NULL);
 771         }
 772
 773         close(s);
 774         return(&nbi);
 775 }
 776
 777 static char *
 778 ether_str(sdl)
 779         struct sockaddr_dl *sdl;
 780 {
 781         static char ebuf[32];
 782         u_char *cp;
 783
 784         if (sdl->sdl_alen) {
 785                 cp = (u_char *)LLADDR(sdl);
 786                 sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
 787                         cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 788         } else {
 789                 sprintf(ebuf, "(incomplete)");
 790         }
 791
 792         return(ebuf);
 793 }
 794
 795 int
 796 ndp_ether_aton(a, n)
 797         char *a;
 798         u_char *n;
 799 {
 800         int i, o[6];
 801
 802         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 803                                            &o[3], &o[4], &o[5]);
 804         if (i != 6) {
 805                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 806                 return (1);
 807         }
 808         for (i=0; i<6; i++)
 809                 n[i] = o[i];
 810         return (0);
 811 }
 812
 813 void
 814 usage()
 815 {
 816         printf("usage: ndp hostname\n");
 817         printf("       ndp -a[nt]\n");
 818         printf("       ndp [-nt] -A wait\n");
 819         printf("       ndp -c[nt]\n");
 820         printf("       ndp -d[nt] hostname\n");
 821         printf("       ndp -f[nt] filename\n");
 822         printf("       ndp -i interface [flags...]\n");
 823 #ifdef SIOCSDEFIFACE_IN6
 824         printf("       ndp -I [interface|delete]\n");
 825 #endif
 826         printf("       ndp -p\n");
 827         printf("       ndp -r\n");
 828         printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
 829         printf("       ndp -H\n");
 830         printf("       ndp -P\n");
 831         printf("       ndp -R\n");
 832         exit(1);
 833 }
 834
 835 int
 836 rtmsg(cmd)
 837         int cmd;
 838 {
 839         static int seq;
 840         int rlen;
 841         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 842         register char *cp = m_rtmsg.m_space;
 843         register int l;
 844
 845         errno = 0;
 846         if (cmd == RTM_DELETE)
 847                 goto doit;
 848         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 849         rtm->rtm_flags = flags;
 850         rtm->rtm_version = RTM_VERSION;
 851
 852         switch (cmd) {
 853         default:
 854                 fprintf(stderr, "ndp: internal wrong cmd\n");
 855                 exit(1);
 856         case RTM_ADD:
 857                 rtm->rtm_addrs |= RTA_GATEWAY;
 858                 rtm->rtm_rmx.rmx_expire = expire_time;
 859                 rtm->rtm_inits = RTV_EXPIRE;
 860                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 861                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 862                         rtm->rtm_flags &= ~RTF_HOST;
 863                         rtm->rtm_flags |= RTA_NETMASK;
 864                 }
 865                 /* FALLTHROUGH */
 866         case RTM_GET:
 867                 rtm->rtm_addrs |= RTA_DST;
 868         }
 869 #define NEXTADDR(w, s) \
 870         if (rtm->rtm_addrs & (w)) { \
 871                 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
 872
 873         NEXTADDR(RTA_DST, sin_m);
 874         NEXTADDR(RTA_GATEWAY, sdl_m);
 875         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 876         NEXTADDR(RTA_NETMASK, so_mask);
 877
 878         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 879 doit:
 880         l = rtm->rtm_msglen;
 881         rtm->rtm_seq = ++seq;
 882         rtm->rtm_type = cmd;
 883         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 884                 if (errno != ESRCH || cmd != RTM_DELETE) {
 885                         perror("writing to routing socket");
 886                         return (-1);
 887                 }
 888         }
 889         do {
 890                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 891         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 892         if (l < 0)
 893                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 894                     strerror(errno));
 895         return (0);
 896 }
 897
 898 void
 899 ifinfo(argc, argv)
 900         int argc;
 901         char **argv;
 902 {
 903         struct in6_ndireq nd;
 904         int i, s;
 905         char *ifname = argv[0];
 906         u_int32_t newflags;
 907 #ifdef IPV6CTL_USETEMPADDR
 908         u_int8_t nullbuf[8];
 909 #endif
 910
 911         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 912                 perror("ndp: socket");
 913                 exit(1);
 914         }
 915         bzero(&nd, sizeof(nd));
 916         strcpy(nd.ifname, ifname);
 917         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 918                 perror("ioctl (SIOCGIFINFO_IN6)");
 919                 exit(1);
 920         }
 921 #define ND nd.ndi
 922         newflags = ND.flags;
 923         for (i = 1; i < argc; i++) {
 924                 int clear = 0;
 925                 char *cp = argv[i];
 926
 927                 if (*cp == '-') {
 928                         clear = 1;
 929                         cp++;
 930                 }
 931
 932 #define SETFLAG(s, f) \
 933         do {\
 934                 if (strcmp(cp, (s)) == 0) {\
 935                         if (clear)\
 936                                 newflags &= ~(f);\
 937                         else\
 938                                 newflags |= (f);\
 939                 }\
 940         } while (0)
 941                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 942
 943                 ND.flags = newflags;
 944                 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
 945                         perror("ioctl(SIOCSIFINFO_FLAGS)");
 946                         exit(1);
 947                 }
 948 #undef SETFLAG
 949         }
 950
 951         printf("linkmtu=%d", ND.linkmtu);
 952         printf(", curhlim=%d", ND.chlim);
 953         printf(", basereachable=%ds%dms",
 954                ND.basereachable / 1000, ND.basereachable % 1000);
 955         printf(", reachable=%ds", ND.reachable);
 956         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
 957 #ifdef IPV6CTL_USETEMPADDR
 958         memset(nullbuf, 0, sizeof(nullbuf));
 959         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
 960                 int j;
 961                 u_int8_t *rbuf;
 962
 963                 for (i = 0; i < 3; i++) {
 964                         switch(i) {
 965                         case 0:
 966                                 printf("\nRandom seed(0): ");
 967                                 rbuf = ND.randomseed0;
 968                                 break;
 969                         case 1:
 970                                 printf("\nRandom seed(1): ");
 971                                 rbuf = ND.randomseed1;
 972                                 break;
 973                         case 2:
 974                                 printf("\nRandom ID:      ");
 975                                 rbuf = ND.randomid;
 976                                 break;
 977                         }
 978                         for (j = 0; j < 8; j++)
 979                                 printf("%02x", rbuf[j]);
 980                 }
 981         }
 982 #endif
 983         if (ND.flags) {
 984                 printf("\nFlags: ");
 985                 if ((ND.flags & ND6_IFF_PERFORMNUD) != 0)
 986                         printf("PERFORMNUD ");
 987         }
 988         putc('\n', stdout);
 989 #undef ND
 990
 991         close(s);
 992 }
 993
 994 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
 995 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
 996 #endif
 997
 998 void
 999 rtrlist()
1000 {
1001 #ifdef ICMPV6CTL_ND6_DRLIST
1002         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1003         char *buf;
1004         struct in6_defrouter *p, *ep;
1005         size_t l;
1006         struct timeval time;
1007
1008         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1009                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1010                 /*NOTREACHED*/
1011         }
1012         buf = malloc(l);
1013         if (!buf) {
1014                 errx(1, "not enough core");
1015                 /*NOTREACHED*/
1016         }
1017         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1018                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1019                 /*NOTREACHED*/
1020         }
1021
1022         ep = (struct in6_defrouter *)(buf + l);
1023         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1024                 int rtpref;
1025
1026                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1027                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1028                     NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)) != 0)
1029                         strlcpy(host_buf, "?", sizeof(host_buf));
1030
1031                 printf("%s if=%s", host_buf,
1032                        if_indextoname(p->if_index, ifix_buf));
1033                 printf(", flags=%s%s",
1034                        p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1035                        p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1036                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1037                 printf(", pref=%s", rtpref_str[rtpref]);
1038
1039                 gettimeofday(&time, 0);
1040                 if (p->expire == 0)
1041                         printf(", expire=Never\n");
1042                 else
1043                         printf(", expire=%s\n",
1044                                 sec2str(p->expire - time.tv_sec));
1045         }
1046         free(buf);
1047 #else
1048         struct in6_drlist dr;
1049         int s, i;
1050         struct timeval time;
1051
1052         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1053                 perror("ndp: socket");
1054                 exit(1);
1055         }
1056         bzero(&dr, sizeof(dr));
1057         strcpy(dr.ifname, "lo0"); /* dummy */
1058         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1059                 perror("ioctl (SIOCGDRLST_IN6)");
1060                 exit(1);
1061         }
1062 #define DR dr.defrouter[i]
1063         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1064                 struct sockaddr_in6 sin6;
1065
1066                 bzero(&sin6, sizeof(sin6));
1067                 sin6.sin6_family = AF_INET6;
1068                 sin6.sin6_len = sizeof(sin6);
1069                 sin6.sin6_addr = DR.rtaddr;
1070                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1071                             sizeof(host_buf), NULL, 0,
1072                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1073
1074                 printf("%s if=%s", host_buf,
1075                        if_indextoname(DR.if_index, ifix_buf));
1076                 printf(", flags=%s%s",
1077                        DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1078                        DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1079                 gettimeofday(&time, 0);
1080                 if (DR.expire == 0)
1081                         printf(", expire=Never\n");
1082                 else
1083                         printf(", expire=%s\n",
1084                                 sec2str(DR.expire - time.tv_sec));
1085         }
1086 #undef DR
1087         close(s);
1088 #endif
1089 }
1090
1091 void
1092 plist()
1093 {
1094 #ifdef ICMPV6CTL_ND6_PRLIST
1095         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1096         char *buf;
1097         struct in6_prefix *p, *ep, *n;
1098         struct sockaddr_in6 *advrtr;
1099         size_t l;
1100         struct timeval time;
1101 #ifdef NI_WITHSCOPEID
1102         const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
1103         int ninflags = (nflag ? NI_NUMERICHOST : 0) | NI_WITHSCOPEID;
1104 #else
1105         const int niflags = NI_NUMERICHOST;
1106         int ninflags = nflag ? NI_NUMERICHOST : 0;
1107 #endif
1108         char namebuf[NI_MAXHOST];
1109
1110         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1111                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1112                 /*NOTREACHED*/
1113         }
1114         buf = malloc(l);
1115         if (!buf) {
1116                 errx(1, "not enough core");
1117                 /*NOTREACHED*/
1118         }
1119         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1120                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1121                 /*NOTREACHED*/
1122         }
1123
1124         ep = (struct in6_prefix *)(buf + l);
1125         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1126                 advrtr = (struct sockaddr_in6 *)(p + 1);
1127                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1128
1129                 if (getnameinfo((struct sockaddr *)&p->prefix,
1130                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1131                     NULL, 0, niflags) != 0)
1132                         strlcpy(namebuf, "?", sizeof(namebuf));
1133                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1134                        if_indextoname(p->if_index, ifix_buf));
1135
1136                 gettimeofday(&time, 0);
1137                 /*
1138                  * meaning of fields, especially flags, is very different
1139                  * by origin.  notify the difference to the users.
1140                  */
1141                 printf("flags=%s%s%s%s%s",
1142                        p->raflags.onlink ? "L" : "",
1143                        p->raflags.autonomous ? "A" : "",
1144                        (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1145                        (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1146 #ifdef NDPRF_HOME
1147                        (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1148 #else
1149                        ""
1150 #endif
1151                        );
1152                 if (p->vltime == ND6_INFINITE_LIFETIME)
1153                         printf(" vltime=infinity");
1154                 else
1155                         printf(" vltime=%ld", (long)p->vltime);
1156                 if (p->pltime == ND6_INFINITE_LIFETIME)
1157                         printf(", pltime=infinity");
1158                 else
1159                         printf(", pltime=%ld", (long)p->pltime);
1160                 if (p->expire == 0)
1161                         printf(", expire=Never");
1162                 else if (p->expire >= time.tv_sec)
1163                         printf(", expire=%s",
1164                                 sec2str(p->expire - time.tv_sec));
1165                 else
1166                         printf(", expired");
1167                 printf(", ref=%d", p->refcnt);
1168                 printf("\n");
1169                 /*
1170                  * "advertising router" list is meaningful only if the prefix
1171                  * information is from RA.
1172                  */
1173                 if (p->advrtrs) {
1174                         int j;
1175                         struct sockaddr_in6 *sin6;
1176
1177                         sin6 = (struct sockaddr_in6 *)(p + 1);
1178                         printf("  advertised by\n");
1179                         for (j = 0; j < p->advrtrs; j++) {
1180                                 struct in6_nbrinfo *nbi;
1181
1182                                 if (getnameinfo((struct sockaddr *)sin6,
1183                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1184                                     NULL, 0, ninflags) != 0)
1185                                         strlcpy(namebuf, "?", sizeof(namebuf));
1186                                 printf("    %s", namebuf);
1187
1188                                 nbi = getnbrinfo(&sin6->sin6_addr, p->if_index,
1189                                                  0);
1190                                 if (nbi) {
1191                                         switch(nbi->state) {
1192                                         case ND6_LLINFO_REACHABLE:
1193                                         case ND6_LLINFO_STALE:
1194                                         case ND6_LLINFO_DELAY:
1195                                         case ND6_LLINFO_PROBE:
1196                                                 printf(" (reachable)\n");
1197                                                 break;
1198                                         default:
1199                                                 printf(" (unreachable)\n");
1200                                         }
1201                                 } else
1202                                         printf(" (no neighbor state)\n");
1203                                 sin6++;
1204                         }
1205                 } else
1206                         printf("  No advertising router\n");
1207         }
1208         free(buf);
1209 #else
1210         struct in6_prlist pr;
1211         int s, i;
1212         struct timeval time;
1213
1214         gettimeofday(&time, 0);
1215
1216         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1217                 perror("ndp: socket");
1218                 exit(1);
1219         }
1220         bzero(&pr, sizeof(pr));
1221         strcpy(pr.ifname, "lo0"); /* dummy */
1222         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1223                 perror("ioctl (SIOCGPRLST_IN6)");
1224                 exit(1);
1225         }
1226 #define PR pr.prefix[i]
1227         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1228                 struct sockaddr_in6 p6;
1229                 char namebuf[NI_MAXHOST];
1230                 int niflags;
1231
1232 #ifdef NDPRF_ONLINK
1233                 p6 = PR.prefix;
1234 #else
1235                 memset(&p6, 0, sizeof(p6));
1236                 p6.sin6_family = AF_INET6;
1237                 p6.sin6_len = sizeof(p6);
1238                 p6.sin6_addr = PR.prefix;
1239 #endif
1240
1241                 /*
1242                  * copy link index to sin6_scope_id field.
1243                  * XXX: KAME specific.
1244                  */
1245                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1246                         u_int16_t linkid;
1247
1248                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1249                                sizeof(linkid));
1250                         linkid = ntohs(linkid);
1251                         p6.sin6_scope_id = linkid;
1252                         p6.sin6_addr.s6_addr[2] = 0;
1253                         p6.sin6_addr.s6_addr[3] = 0;
1254                 }
1255
1256                 niflags = NI_NUMERICHOST;
1257 #ifdef __KAME__
1258                 niflags |= NI_WITHSCOPEID;
1259 #endif
1260                 if (getnameinfo((struct sockaddr *)&p6,
1261                                 sizeof(p6), namebuf, sizeof(namebuf),
1262                                 NULL, 0, niflags)) {
1263                         warnx("getnameinfo failed");
1264                         continue;
1265                 }
1266                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1267                        if_indextoname(PR.if_index, ifix_buf));
1268
1269                 gettimeofday(&time, 0);
1270                 /*
1271                  * meaning of fields, especially flags, is very different
1272                  * by origin.  notify the difference to the users.
1273                  */
1274 #if 0
1275                 printf("  %s",
1276                        PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1277 #endif
1278 #ifdef NDPRF_ONLINK
1279                 printf("flags=%s%s%s%s%s",
1280                        PR.raflags.onlink ? "L" : "",
1281                        PR.raflags.autonomous ? "A" : "",
1282                        (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1283                        (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1284 #ifdef NDPRF_HOME
1285                        (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1286 #else
1287                        ""
1288 #endif
1289                        );
1290 #else
1291                 printf("flags=%s%s",
1292                        PR.raflags.onlink ? "L" : "",
1293                        PR.raflags.autonomous ? "A" : "");
1294 #endif
1295                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1296                         printf(" vltime=infinity");
1297                 else
1298                         printf(" vltime=%ld", (long)PR.vltime);
1299                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1300                         printf(", pltime=infinity");
1301                 else
1302                         printf(", pltime=%ld", (long)PR.pltime);
1303                 if (PR.expire == 0)
1304                         printf(", expire=Never");
1305                 else if (PR.expire >= time.tv_sec)
1306                         printf(", expire=%s",
1307                                 sec2str(PR.expire - time.tv_sec));
1308                 else
1309                         printf(", expired");
1310 #ifdef NDPRF_ONLINK
1311                 printf(", ref=%d", PR.refcnt);
1312 #endif
1313 #if 0
1314                 switch (PR.origin) {
1315                 case PR_ORIG_RA:
1316                         printf(", origin=RA");
1317                         break;
1318                 case PR_ORIG_RR:
1319                         printf(", origin=RR");
1320                         break;
1321                 case PR_ORIG_STATIC:
1322                         printf(", origin=static");
1323                         break;
1324                 case PR_ORIG_KERNEL:
1325                         printf(", origin=kernel");
1326                         break;
1327                 default:
1328                         printf(", origin=?");
1329                         break;
1330                 }
1331 #endif
1332                 printf("\n");
1333                 /*
1334                  * "advertising router" list is meaningful only if the prefix
1335                  * information is from RA.
1336                  */
1337                 if (0 &&        /* prefix origin is almost obsolted */
1338                     PR.origin != PR_ORIG_RA)
1339                         ;
1340                 else if (PR.advrtrs) {
1341                         int j;
1342                         printf("  advertised by\n");
1343                         for (j = 0; j < PR.advrtrs; j++) {
1344                                 struct sockaddr_in6 sin6;
1345                                 struct in6_nbrinfo *nbi;
1346
1347                                 bzero(&sin6, sizeof(sin6));
1348                                 sin6.sin6_family = AF_INET6;
1349                                 sin6.sin6_len = sizeof(sin6);
1350                                 sin6.sin6_addr = PR.advrtr[j];
1351                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1352                                 getnameinfo((struct sockaddr *)&sin6,
1353                                             sin6.sin6_len, host_buf,
1354                                             sizeof(host_buf), NULL, 0,
1355                                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1356                                 printf("    %s", host_buf);
1357
1358                                 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
1359                                                  0);
1360                                 if (nbi) {
1361                                         switch(nbi->state) {
1362                                          case ND6_LLINFO_REACHABLE:
1363                                          case ND6_LLINFO_STALE:
1364                                          case ND6_LLINFO_DELAY:
1365                                          case ND6_LLINFO_PROBE:
1366                                                  printf(" (reachable)\n");
1367                                                  break;
1368                                          default:
1369                                                  printf(" (unreachable)\n");
1370                                         }
1371                                 } else
1372                                         printf(" (no neighbor state)\n");
1373                         }
1374                         if (PR.advrtrs > DRLSTSIZ)
1375                                 printf("    and %d routers\n",
1376                                        PR.advrtrs - DRLSTSIZ);
1377                 } else
1378                         printf("  No advertising router\n");
1379         }
1380 #undef PR
1381         close(s);
1382 #endif
1383 }
1384
1385 void
1386 pfx_flush()
1387 {
1388         char dummyif[IFNAMSIZ+8];
1389         int s;
1390
1391         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1392                 err(1, "socket");
1393         strcpy(dummyif, "lo0"); /* dummy */
1394         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1395                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1396 }
1397
1398 void
1399 rtr_flush()
1400 {
1401         char dummyif[IFNAMSIZ+8];
1402         int s;
1403
1404         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1405                 err(1, "socket");
1406         strcpy(dummyif, "lo0"); /* dummy */
1407         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1408                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1409
1410         close(s);
1411 }
1412
1413 void
1414 harmonize_rtr()
1415 {
1416         char dummyif[IFNAMSIZ+8];
1417         int s;
1418
1419         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1420                 err(1, "socket");
1421         strcpy(dummyif, "lo0"); /* dummy */
1422         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1423                 err(1, "ioctl (SIOCSNDFLUSH_IN6)");
1424
1425         close(s);
1426 }
1427
1428 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1429 static void
1430 setdefif(ifname)
1431         char *ifname;
1432 {
1433         struct in6_ndifreq ndifreq;
1434         unsigned int ifindex;
1435
1436         if (strcasecmp(ifname, "delete") == 0)
1437                 ifindex = 0;
1438         else {
1439                 if ((ifindex = if_nametoindex(ifname)) == 0)
1440                         err(1, "failed to resolve i/f index for %s", ifname);
1441         }
1442
1443         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1444                 err(1, "socket");
1445
1446         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1447         ndifreq.ifindex = ifindex;
1448
1449         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1450                 err(1, "ioctl (SIOCSDEFIFACE_IN6)");
1451
1452         close(s);
1453 }
1454
1455 static void
1456 getdefif()
1457 {
1458         struct in6_ndifreq ndifreq;
1459         char ifname[IFNAMSIZ+8];
1460
1461         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1462                 err(1, "socket");
1463
1464         memset(&ndifreq, 0, sizeof(ndifreq));
1465         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1466
1467         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1468                 err(1, "ioctl (SIOCGDEFIFACE_IN6)");
1469
1470         if (ndifreq.ifindex == 0)
1471                 printf("No default interface.\n");
1472         else {
1473                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1474                         err(1, "failed to resolve ifname for index %lu",
1475                             ndifreq.ifindex);
1476                 printf("ND default interface = %s\n", ifname);
1477         }
1478
1479         close(s);
1480 }
1481 #endif
1482
1483 static char *
1484 sec2str(total)
1485         time_t total;
1486 {
1487         static char result[256];
1488         int days, hours, mins, secs;
1489         int first = 1;
1490         char *p = result;
1491
1492         days = total / 3600 / 24;
1493         hours = (total / 3600) % 24;
1494         mins = (total / 60) % 60;
1495         secs = total % 60;
1496
1497         if (days) {
1498                 first = 0;
1499                 p += sprintf(p, "%dd", days);
1500         }
1501         if (!first || hours) {
1502                 first = 0;
1503                 p += sprintf(p, "%dh", hours);
1504         }
1505         if (!first || mins) {
1506                 first = 0;
1507                 p += sprintf(p, "%dm", mins);
1508         }
1509         sprintf(p, "%ds", secs);
1510
1511         return(result);
1512 }
1513
1514 /*
1515  * Print the timestamp
1516  * from tcpdump/util.c
1517  */
1518 static void
1519 ts_print(tvp)
1520         const struct timeval *tvp;
1521 {
1522         int s;
1523
1524         /* Default */
1525         s = (tvp->tv_sec + thiszone) % 86400;
1526         (void)printf("%02d:%02d:%02d.%06u ",
1527             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1528 }