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 /*      $DragonFly: src/usr.sbin/ndp/ndp.c,v 1.2 2003/06/17 04:29:57 dillon Exp $       */
   3 /*      $KAME: ndp.c,v 1.65 2001/05/08 04:36:34 itojun Exp $    */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33 /*
  34  * Copyright (c) 1984, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * This code is derived from software contributed to Berkeley by
  38  * Sun Microsystems, Inc.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 3. All advertising materials mentioning features or use of this software
  49  *    must display the following acknowledgement:
  50  *      This product includes software developed by the University of
  51  *      California, Berkeley and its contributors.
  52  * 4. Neither the name of the University nor the names of its contributors
  53  *    may be used to endorse or promote products derived from this software
  54  *    without specific prior written permission.
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  57  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  58  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  59  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  60  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  61  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  62  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  64  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  65  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  66  * SUCH DAMAGE.
  67  */
  68
  69 /*
  70  * Based on:
  71  * "@(#) Copyright (c) 1984, 1993\n\
  72  *      The Regents of the University of California.  All rights reserved.\n";
  73  *
  74  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  75  */
  76
  77 /*
  78  * ndp - display, set, delete and flush neighbor cache
  79  */
  80
  81
  82 #include <sys/param.h>
  83 #include <sys/file.h>
  84 #include <sys/ioctl.h>
  85 #include <sys/socket.h>
  86 #include <sys/sysctl.h>
  87 #include <sys/time.h>
  88 #include <sys/queue.h>
  89
  90 #include <net/if.h>
  91 #include <net/if_var.h>
  92 #include <net/if_dl.h>
  93 #include <net/if_types.h>
  94 #include <net/route.h>
  95
  96 #include <netinet/in.h>
  97 #include <netinet/if_ether.h>
  98
  99 #include <netinet/icmp6.h>
 100 #include <netinet6/in6_var.h>
 101 #include <netinet6/nd6.h>
 102
 103 #include <arpa/inet.h>
 104
 105 #include <netdb.h>
 106 #include <errno.h>
 107 #include <nlist.h>
 108 #include <stdio.h>
 109 #include <string.h>
 110 #include <paths.h>
 111 #include <err.h>
 112 #include <stdlib.h>
 113 #include <fcntl.h>
 114 #include <unistd.h>
 115 #include "gmt2local.h"
 116
 117 #ifndef NI_WITHSCOPEID
 118 #define NI_WITHSCOPEID  0
 119 #endif
 120
 121 /* packing rule for routing socket */
 122 #define ROUNDUP(a) \
 123         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 124 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 125
 126 static int pid;
 127 static int cflag;
 128 static int nflag;
 129 static int tflag;
 130 static int32_t thiszone;        /* time difference with gmt */
 131 static int s = -1;
 132 static int repeat = 0;
 133
 134 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 135 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 136 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 137
 138 int main __P((int, char **));
 139 int file __P((char *));
 140 void getsocket __P((void));
 141 int set __P((int, char **));
 142 void get __P((char *));
 143 int delete __P((char *));
 144 void dump __P((struct in6_addr *));
 145 static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *addr,
 146                                            int ifindex, int));
 147 static char *ether_str __P((struct sockaddr_dl *));
 148 int ndp_ether_aton __P((char *, u_char *));
 149 void usage __P((void));
 150 int rtmsg __P((int));
 151 void ifinfo __P((int, char **));
 152 void rtrlist __P((void));
 153 void plist __P((void));
 154 void pfx_flush __P((void));
 155 void rtrlist __P((void));
 156 void rtr_flush __P((void));
 157 void harmonize_rtr __P((void));
 158 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 159 static void getdefif __P((void));
 160 static void setdefif __P((char *));
 161 #endif
 162 static char *sec2str __P((time_t t));
 163 static char *ether_str __P((struct sockaddr_dl *sdl));
 164 static void ts_print __P((const struct timeval *));
 165
 166 static char *rtpref_str[] = {
 167         "medium",               /* 00 */
 168         "high",                 /* 01 */
 169         "rsv",                  /* 10 */
 170         "low"                   /* 11 */
 171 };
 172
 173 int
 174 main(argc, argv)
 175         int argc;
 176         char **argv;
 177 {
 178         int ch;
 179         int aflag = 0, dflag = 0, sflag = 0, Hflag = 0,
 180                 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
 181
 182         pid = getpid();
 183         thiszone = gmt2local(0);
 184         while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != -1)
 185                 switch ((char)ch) {
 186                 case 'a':
 187                         aflag = 1;
 188                         break;
 189                 case 'c':
 190                         cflag = 1;
 191                         break;
 192                 case 'd':
 193                         dflag = 1;
 194                         break;
 195                 case 'I':
 196 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 197                         if (argc > 2)
 198                                 setdefif(argv[2]);
 199                         getdefif(); /* always call it to print the result */
 200                         exit(0);
 201 #else
 202                         errx(1, "not supported yet");
 203                         /*NOTREACHED*/
 204 #endif
 205                 case 'i' :
 206                         argc -= optind;
 207                         argv += optind;
 208                         if (argc < 1)
 209                                 usage();
 210                         ifinfo(argc, argv);
 211                         exit(0);
 212                 case 'n':
 213                         nflag = 1;
 214                         continue;
 215                 case 'p':
 216                         pflag = 1;
 217                         break;
 218                 case 'f' :
 219                         if (argc != 3)
 220                                 usage();
 221                         file(argv[2]);
 222                         exit(0);
 223                 case 'l' :
 224                         /* obsolete, ignored */
 225                         break;
 226                 case 'r' :
 227                         rflag = 1;
 228                         break;
 229                 case 's':
 230                         sflag = 1;
 231                         break;
 232                 case 't':
 233                         tflag = 1;
 234                         break;
 235                 case 'A':
 236                         aflag = 1;
 237                         repeat = atoi(optarg);
 238                         if (repeat < 0)
 239                                 usage();
 240                         break;
 241                 case 'H' :
 242                         Hflag = 1;
 243                         break;
 244                 case 'P':
 245                         Pflag = 1;
 246                         break;
 247                 case 'R':
 248                         Rflag = 1;
 249                         break;
 250                 default:
 251                         usage();
 252                 }
 253
 254         argc -= optind;
 255         argv += optind;
 256
 257         if (aflag || cflag) {
 258                 dump(0);
 259                 exit(0);
 260         }
 261         if (dflag) {
 262                 if (argc != 1)
 263                         usage();
 264                 delete(argv[0]);
 265                 exit(0);
 266         }
 267         if (pflag) {
 268                 plist();
 269                 exit(0);
 270         }
 271         if (rflag) {
 272                 rtrlist();
 273                 exit(0);
 274         }
 275         if (sflag) {
 276                 if (argc < 2 || argc > 4)
 277                         usage();
 278                 exit(set(argc, argv) ? 1 : 0);
 279         }
 280         if (Hflag) {
 281                 harmonize_rtr();
 282                 exit(0);
 283         }
 284         if (Pflag) {
 285                 pfx_flush();
 286                 exit(0);
 287         }
 288         if (Rflag) {
 289                 rtr_flush();
 290                 exit(0);
 291         }
 292
 293         if (argc != 1)
 294                 usage();
 295         get(argv[0]);
 296         exit(0);
 297 }
 298
 299 /*
 300  * Process a file to set standard ndp entries
 301  */
 302 int
 303 file(name)
 304         char *name;
 305 {
 306         FILE *fp;
 307         int i, retval;
 308         char line[100], arg[5][50], *args[5];
 309
 310         if ((fp = fopen(name, "r")) == NULL) {
 311                 fprintf(stderr, "ndp: cannot open %s\n", name);
 312                 exit(1);
 313         }
 314         args[0] = &arg[0][0];
 315         args[1] = &arg[1][0];
 316         args[2] = &arg[2][0];
 317         args[3] = &arg[3][0];
 318         args[4] = &arg[4][0];
 319         retval = 0;
 320         while(fgets(line, 100, fp) != NULL) {
 321                 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
 322                     arg[3], arg[4]);
 323                 if (i < 2) {
 324                         fprintf(stderr, "ndp: bad line: %s\n", line);
 325                         retval = 1;
 326                         continue;
 327                 }
 328                 if (set(i, args))
 329                         retval = 1;
 330         }
 331         fclose(fp);
 332         return (retval);
 333 }
 334
 335 void
 336 getsocket()
 337 {
 338         if (s < 0) {
 339                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 340                 if (s < 0) {
 341                         perror("ndp: socket");
 342                         exit(1);
 343                 }
 344         }
 345 }
 346
 347 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 348 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 349 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 350 int     expire_time, flags, found_entry;
 351 struct  {
 352         struct  rt_msghdr m_rtm;
 353         char    m_space[512];
 354 }       m_rtmsg;
 355
 356 /*
 357  * Set an individual neighbor cache entry
 358  */
 359 int
 360 set(argc, argv)
 361         int argc;
 362         char **argv;
 363 {
 364         register struct sockaddr_in6 *sin = &sin_m;
 365         register struct sockaddr_dl *sdl;
 366         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 367         struct addrinfo hints, *res;
 368         int gai_error;
 369         u_char *ea;
 370         char *host = argv[0], *eaddr = argv[1];
 371
 372         getsocket();
 373         argc -= 2;
 374         argv += 2;
 375         sdl_m = blank_sdl;
 376         sin_m = blank_sin;
 377
 378         bzero(&hints, sizeof(hints));
 379         hints.ai_family = AF_INET6;
 380         gai_error = getaddrinfo(host, NULL, &hints, &res);
 381         if (gai_error) {
 382                 fprintf(stderr, "ndp: %s: %s\n", host,
 383                         gai_strerror(gai_error));
 384                 return 1;
 385         }
 386         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 387 #ifdef __KAME__
 388         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 389                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 390                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 391         }
 392 #endif
 393         ea = (u_char *)LLADDR(&sdl_m);
 394         if (ndp_ether_aton(eaddr, ea) == 0)
 395                 sdl_m.sdl_alen = 6;
 396         flags = expire_time = 0;
 397         while (argc-- > 0) {
 398                 if (strncmp(argv[0], "temp", 4) == 0) {
 399                         struct timeval time;
 400                         gettimeofday(&time, 0);
 401                         expire_time = time.tv_sec + 20 * 60;
 402                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 403                         flags |= RTF_ANNOUNCE;
 404                 argv++;
 405         }
 406         if (rtmsg(RTM_GET) < 0) {
 407                 perror(host);
 408                 return (1);
 409         }
 410         sin = (struct sockaddr_in6 *)(rtm + 1);
 411         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 412         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 413                 if (sdl->sdl_family == AF_LINK &&
 414                     (rtm->rtm_flags & RTF_LLINFO) &&
 415                     !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
 416                 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 417                 case IFT_ISO88024: case IFT_ISO88025:
 418                         goto overwrite;
 419                 }
 420                 /*
 421                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 422                  */
 423                 fprintf(stderr, "set: cannot configure a new entry\n");
 424                 return 1;
 425         }
 426
 427 overwrite:
 428         if (sdl->sdl_family != AF_LINK) {
 429                 printf("cannot intuit interface index and type for %s\n", host);
 430                 return (1);
 431         }
 432         sdl_m.sdl_type = sdl->sdl_type;
 433         sdl_m.sdl_index = sdl->sdl_index;
 434         return (rtmsg(RTM_ADD));
 435 }
 436
 437 /*
 438  * Display an individual neighbor cache entry
 439  */
 440 void
 441 get(host)
 442         char *host;
 443 {
 444         struct sockaddr_in6 *sin = &sin_m;
 445         struct addrinfo hints, *res;
 446         int gai_error;
 447
 448         sin_m = blank_sin;
 449         bzero(&hints, sizeof(hints));
 450         hints.ai_family = AF_INET6;
 451         gai_error = getaddrinfo(host, NULL, &hints, &res);
 452         if (gai_error) {
 453                 fprintf(stderr, "ndp: %s: %s\n", host,
 454                         gai_strerror(gai_error));
 455                 return;
 456         }
 457         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 458 #ifdef __KAME__
 459         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 460                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 461                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 462         }
 463 #endif
 464         dump(&sin->sin6_addr);
 465         if (found_entry == 0) {
 466                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 467                             sizeof(host_buf), NULL ,0,
 468                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 469                 printf("%s (%s) -- no entry\n", host, host_buf);
 470                 exit(1);
 471         }
 472 }
 473
 474 /*
 475  * Delete a neighbor cache entry
 476  */
 477 int
 478 delete(host)
 479         char *host;
 480 {
 481         struct sockaddr_in6 *sin = &sin_m;
 482         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 483         struct sockaddr_dl *sdl;
 484         struct addrinfo hints, *res;
 485         int gai_error;
 486
 487         getsocket();
 488         sin_m = blank_sin;
 489
 490         bzero(&hints, sizeof(hints));
 491         hints.ai_family = AF_INET6;
 492         gai_error = getaddrinfo(host, NULL, &hints, &res);
 493         if (gai_error) {
 494                 fprintf(stderr, "ndp: %s: %s\n", host,
 495                         gai_strerror(gai_error));
 496                 return 1;
 497         }
 498         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 499 #ifdef __KAME__
 500         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 501                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 502                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 503         }
 504 #endif
 505         if (rtmsg(RTM_GET) < 0) {
 506                 perror(host);
 507                 return (1);
 508         }
 509         sin = (struct sockaddr_in6 *)(rtm + 1);
 510         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 511         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 512                 if (sdl->sdl_family == AF_LINK &&
 513                     (rtm->rtm_flags & RTF_LLINFO) &&
 514                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 515                         goto delete;
 516                 }
 517                 /*
 518                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 519                  */
 520                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 521                 return 1;
 522         }
 523
 524 delete:
 525         if (sdl->sdl_family != AF_LINK) {
 526                 printf("cannot locate %s\n", host);
 527                 return (1);
 528         }
 529         if (rtmsg(RTM_DELETE) == 0) {
 530                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 531
 532 #ifdef __KAME__
 533                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 534                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 535                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 536                 }
 537 #endif
 538                 getnameinfo((struct sockaddr *)&s6,
 539                             s6.sin6_len, host_buf,
 540                             sizeof(host_buf), NULL, 0,
 541                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 542                 printf("%s (%s) deleted\n", host, host_buf);
 543         }
 544
 545         return 0;
 546 }
 547
 548 #define W_ADDR  31
 549 #define W_LL    17
 550 #define W_IF    6
 551
 552 /*
 553  * Dump the entire neighbor cache
 554  */
 555 void
 556 dump(addr)
 557         struct in6_addr *addr;
 558 {
 559         int mib[6];
 560         size_t needed;
 561         char *lim, *buf, *next;
 562         struct rt_msghdr *rtm;
 563         struct sockaddr_in6 *sin;
 564         struct sockaddr_dl *sdl;
 565         extern int h_errno;
 566         struct in6_nbrinfo *nbi;
 567         struct timeval time;
 568         int addrwidth;
 569         int llwidth;
 570         int ifwidth;
 571         char flgbuf[8];
 572         char *ifname;
 573
 574         /* Print header */
 575         if (!tflag && !cflag)
 576                 printf("%-*.*s %-*.*s %*.*s %-9.9s %2s %4s %4s\n",
 577                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 578                     W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs");
 579
 580 again:;
 581         mib[0] = CTL_NET;
 582         mib[1] = PF_ROUTE;
 583         mib[2] = 0;
 584         mib[3] = AF_INET6;
 585         mib[4] = NET_RT_FLAGS;
 586         mib[5] = RTF_LLINFO;
 587         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 588                 err(1, "sysctl(PF_ROUTE estimate)");
 589         if (needed > 0) {
 590                 if ((buf = malloc(needed)) == NULL)
 591                         errx(1, "malloc");
 592                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 593                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 594                 lim = buf + needed;
 595         } else
 596                 buf = lim = NULL;
 597
 598         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 599                 int isrouter = 0, prbs = 0;
 600
 601                 rtm = (struct rt_msghdr *)next;
 602                 sin = (struct sockaddr_in6 *)(rtm + 1);
 603                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 604
 605                 /*
 606                  * Some OSes can produce a route that has the LINK flag but
 607                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 608                  * and BSD/OS, where xx is not the interface identifier on
 609                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 610                  * so we skip them.
 611                  * XXX: such routes should have the GATEWAY flag, not the
 612                  * LINK flag.  However, there are rotten routing software
 613                  * that advertises all routes that have the GATEWAY flag.
 614                  * Thus, KAME kernel intentionally does not set the LINK flag.
 615                  * What is to be fixed is not ndp, but such routing software
 616                  * (and the kernel workaround)...
 617                  */
 618                 if (sdl->sdl_family != AF_LINK)
 619                         continue;
 620
 621                 if (addr) {
 622                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 623                                 continue;
 624                         found_entry = 1;
 625                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 626                         continue;
 627                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 628                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 629                         /* XXX: should scope id be filled in the kernel? */
 630                         if (sin->sin6_scope_id == 0)
 631                                 sin->sin6_scope_id = sdl->sdl_index;
 632 #ifdef __KAME__
 633                         /* KAME specific hack; removed the embedded id */
 634                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 635 #endif
 636                 }
 637                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 638                             sizeof(host_buf), NULL, 0,
 639                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 640                 if (cflag == 1) {
 641 #ifdef RTF_WASCLONED
 642                         if (rtm->rtm_flags & RTF_WASCLONED)
 643                                 delete(host_buf);
 644 #else
 645                         delete(host_buf);
 646 #endif
 647                         continue;
 648                 }
 649                 gettimeofday(&time, 0);
 650                 if (tflag)
 651                         ts_print(&time);
 652
 653                 addrwidth = strlen(host_buf);
 654                 if (addrwidth < W_ADDR)
 655                         addrwidth = W_ADDR;
 656                 llwidth = strlen(ether_str(sdl));
 657                 if (W_ADDR + W_LL - addrwidth > llwidth)
 658                         llwidth = W_ADDR + W_LL - addrwidth;
 659                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 660                 if (!ifname)
 661                         ifname = "?";
 662                 ifwidth = strlen(ifname);
 663                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 664                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 665
 666                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 667                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 668
 669                 /* Print neighbor discovery specific informations */
 670                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 671                 if (nbi) {
 672                         if (nbi->expire > time.tv_sec) {
 673                                 printf(" %-9.9s",
 674                                        sec2str(nbi->expire - time.tv_sec));
 675                         } else if (nbi->expire == 0)
 676                                 printf(" %-9.9s", "permanent");
 677                         else
 678                                 printf(" %-9.9s", "expired");
 679
 680                         switch(nbi->state) {
 681                          case ND6_LLINFO_NOSTATE:
 682                                  printf(" N");
 683                                  break;
 684 #ifdef ND6_LLINFO_WAITDELETE
 685                          case ND6_LLINFO_WAITDELETE:
 686                                  printf(" W");
 687                                  break;
 688 #endif
 689                          case ND6_LLINFO_INCOMPLETE:
 690                                  printf(" I");
 691                                  break;
 692                          case ND6_LLINFO_REACHABLE:
 693                                  printf(" R");
 694                                  break;
 695                          case ND6_LLINFO_STALE:
 696                                  printf(" S");
 697                                  break;
 698                          case ND6_LLINFO_DELAY:
 699                                  printf(" D");
 700                                  break;
 701                          case ND6_LLINFO_PROBE:
 702                                  printf(" P");
 703                                  break;
 704                          default:
 705                                  printf(" ?");
 706                                  break;
 707                         }
 708
 709                         isrouter = nbi->isrouter;
 710                         prbs = nbi->asked;
 711                 } else {
 712                         warnx("failed to get neighbor information");
 713                         printf("  ");
 714                 }
 715                 putchar(' ');
 716
 717                 /*
 718                  * other flags. R: router, P: proxy, W: ??
 719                  */
 720                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 721                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 722                                 isrouter ? "R" : "",
 723                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 724                 } else {
 725                         sin = (struct sockaddr_in6 *)
 726                                 (sdl->sdl_len + (char *)sdl);
 727                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 728                                 isrouter ? "R" : "",
 729                                 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr)
 730                                         ? "P" : "",
 731                                 (sin->sin6_len != sizeof(struct sockaddr_in6))
 732                                         ? "W" : "",
 733                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 734                 }
 735                 printf(" %-4.4s", flgbuf);
 736
 737                 if (prbs)
 738                         printf(" %4d", prbs);
 739
 740                 printf("\n");
 741         }
 742         if (buf != NULL)
 743                 free(buf);
 744
 745         if (repeat) {
 746                 printf("\n");
 747                 sleep(repeat);
 748                 goto again;
 749         }
 750 }
 751
 752 static struct in6_nbrinfo *
 753 getnbrinfo(addr, ifindex, warning)
 754         struct in6_addr *addr;
 755         int ifindex;
 756         int warning;
 757 {
 758         static struct in6_nbrinfo nbi;
 759         int s;
 760
 761         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 762                 err(1, "socket");
 763
 764         bzero(&nbi, sizeof(nbi));
 765         if_indextoname(ifindex, nbi.ifname);
 766         nbi.addr = *addr;
 767         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 768                 if (warning)
 769                         warn("ioctl(SIOCGNBRINFO_IN6)");
 770                 close(s);
 771                 return(NULL);
 772         }
 773
 774         close(s);
 775         return(&nbi);
 776 }
 777
 778 static char *
 779 ether_str(sdl)
 780         struct sockaddr_dl *sdl;
 781 {
 782         static char ebuf[32];
 783         u_char *cp;
 784
 785         if (sdl->sdl_alen) {
 786                 cp = (u_char *)LLADDR(sdl);
 787                 sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
 788                         cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 789         } else {
 790                 sprintf(ebuf, "(incomplete)");
 791         }
 792
 793         return(ebuf);
 794 }
 795
 796 int
 797 ndp_ether_aton(a, n)
 798         char *a;
 799         u_char *n;
 800 {
 801         int i, o[6];
 802
 803         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 804                                            &o[3], &o[4], &o[5]);
 805         if (i != 6) {
 806                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 807                 return (1);
 808         }
 809         for (i=0; i<6; i++)
 810                 n[i] = o[i];
 811         return (0);
 812 }
 813
 814 void
 815 usage()
 816 {
 817         printf("usage: ndp hostname\n");
 818         printf("       ndp -a[nt]\n");
 819         printf("       ndp [-nt] -A wait\n");
 820         printf("       ndp -c[nt]\n");
 821         printf("       ndp -d[nt] hostname\n");
 822         printf("       ndp -f[nt] filename\n");
 823         printf("       ndp -i interface [flags...]\n");
 824 #ifdef SIOCSDEFIFACE_IN6
 825         printf("       ndp -I [interface|delete]\n");
 826 #endif
 827         printf("       ndp -p\n");
 828         printf("       ndp -r\n");
 829         printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
 830         printf("       ndp -H\n");
 831         printf("       ndp -P\n");
 832         printf("       ndp -R\n");
 833         exit(1);
 834 }
 835
 836 int
 837 rtmsg(cmd)
 838         int cmd;
 839 {
 840         static int seq;
 841         int rlen;
 842         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 843         register char *cp = m_rtmsg.m_space;
 844         register int l;
 845
 846         errno = 0;
 847         if (cmd == RTM_DELETE)
 848                 goto doit;
 849         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 850         rtm->rtm_flags = flags;
 851         rtm->rtm_version = RTM_VERSION;
 852
 853         switch (cmd) {
 854         default:
 855                 fprintf(stderr, "ndp: internal wrong cmd\n");
 856                 exit(1);
 857         case RTM_ADD:
 858                 rtm->rtm_addrs |= RTA_GATEWAY;
 859                 rtm->rtm_rmx.rmx_expire = expire_time;
 860                 rtm->rtm_inits = RTV_EXPIRE;
 861                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 862                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 863                         rtm->rtm_flags &= ~RTF_HOST;
 864                         rtm->rtm_flags |= RTA_NETMASK;
 865                 }
 866                 /* FALLTHROUGH */
 867         case RTM_GET:
 868                 rtm->rtm_addrs |= RTA_DST;
 869         }
 870 #define NEXTADDR(w, s) \
 871         if (rtm->rtm_addrs & (w)) { \
 872                 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
 873
 874         NEXTADDR(RTA_DST, sin_m);
 875         NEXTADDR(RTA_GATEWAY, sdl_m);
 876         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 877         NEXTADDR(RTA_NETMASK, so_mask);
 878
 879         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 880 doit:
 881         l = rtm->rtm_msglen;
 882         rtm->rtm_seq = ++seq;
 883         rtm->rtm_type = cmd;
 884         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 885                 if (errno != ESRCH || cmd != RTM_DELETE) {
 886                         perror("writing to routing socket");
 887                         return (-1);
 888                 }
 889         }
 890         do {
 891                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 892         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 893         if (l < 0)
 894                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 895                     strerror(errno));
 896         return (0);
 897 }
 898
 899 void
 900 ifinfo(argc, argv)
 901         int argc;
 902         char **argv;
 903 {
 904         struct in6_ndireq nd;
 905         int i, s;
 906         char *ifname = argv[0];
 907         u_int32_t newflags;
 908 #ifdef IPV6CTL_USETEMPADDR
 909         u_int8_t nullbuf[8];
 910 #endif
 911
 912         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 913                 perror("ndp: socket");
 914                 exit(1);
 915         }
 916         bzero(&nd, sizeof(nd));
 917         strcpy(nd.ifname, ifname);
 918         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 919                 perror("ioctl (SIOCGIFINFO_IN6)");
 920                 exit(1);
 921         }
 922 #define ND nd.ndi
 923         newflags = ND.flags;
 924         for (i = 1; i < argc; i++) {
 925                 int clear = 0;
 926                 char *cp = argv[i];
 927
 928                 if (*cp == '-') {
 929                         clear = 1;
 930                         cp++;
 931                 }
 932
 933 #define SETFLAG(s, f) \
 934         do {\
 935                 if (strcmp(cp, (s)) == 0) {\
 936                         if (clear)\
 937                                 newflags &= ~(f);\
 938                         else\
 939                                 newflags |= (f);\
 940                 }\
 941         } while (0)
 942                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 943
 944                 ND.flags = newflags;
 945                 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
 946                         perror("ioctl(SIOCSIFINFO_FLAGS)");
 947                         exit(1);
 948                 }
 949 #undef SETFLAG
 950         }
 951
 952         printf("linkmtu=%d", ND.linkmtu);
 953         printf(", curhlim=%d", ND.chlim);
 954         printf(", basereachable=%ds%dms",
 955                ND.basereachable / 1000, ND.basereachable % 1000);
 956         printf(", reachable=%ds", ND.reachable);
 957         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
 958 #ifdef IPV6CTL_USETEMPADDR
 959         memset(nullbuf, 0, sizeof(nullbuf));
 960         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
 961                 int j;
 962                 u_int8_t *rbuf;
 963
 964                 for (i = 0; i < 3; i++) {
 965                         switch(i) {
 966                         case 0:
 967                                 printf("\nRandom seed(0): ");
 968                                 rbuf = ND.randomseed0;
 969                                 break;
 970                         case 1:
 971                                 printf("\nRandom seed(1): ");
 972                                 rbuf = ND.randomseed1;
 973                                 break;
 974                         case 2:
 975                                 printf("\nRandom ID:      ");
 976                                 rbuf = ND.randomid;
 977                                 break;
 978                         }
 979                         for (j = 0; j < 8; j++)
 980                                 printf("%02x", rbuf[j]);
 981                 }
 982         }
 983 #endif
 984         if (ND.flags) {
 985                 printf("\nFlags: ");
 986                 if ((ND.flags & ND6_IFF_PERFORMNUD) != 0)
 987                         printf("PERFORMNUD ");
 988         }
 989         putc('\n', stdout);
 990 #undef ND
 991
 992         close(s);
 993 }
 994
 995 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
 996 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
 997 #endif
 998
 999 void
1000 rtrlist()
1001 {
1002 #ifdef ICMPV6CTL_ND6_DRLIST
1003         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1004         char *buf;
1005         struct in6_defrouter *p, *ep;
1006         size_t l;
1007         struct timeval time;
1008
1009         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1010                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1011                 /*NOTREACHED*/
1012         }
1013         buf = malloc(l);
1014         if (!buf) {
1015                 errx(1, "not enough core");
1016                 /*NOTREACHED*/
1017         }
1018         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1019                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1020                 /*NOTREACHED*/
1021         }
1022
1023         ep = (struct in6_defrouter *)(buf + l);
1024         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1025                 int rtpref;
1026
1027                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1028                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1029                     NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)) != 0)
1030                         strlcpy(host_buf, "?", sizeof(host_buf));
1031
1032                 printf("%s if=%s", host_buf,
1033                        if_indextoname(p->if_index, ifix_buf));
1034                 printf(", flags=%s%s",
1035                        p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1036                        p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1037                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1038                 printf(", pref=%s", rtpref_str[rtpref]);
1039
1040                 gettimeofday(&time, 0);
1041                 if (p->expire == 0)
1042                         printf(", expire=Never\n");
1043                 else
1044                         printf(", expire=%s\n",
1045                                 sec2str(p->expire - time.tv_sec));
1046         }
1047         free(buf);
1048 #else
1049         struct in6_drlist dr;
1050         int s, i;
1051         struct timeval time;
1052
1053         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1054                 perror("ndp: socket");
1055                 exit(1);
1056         }
1057         bzero(&dr, sizeof(dr));
1058         strcpy(dr.ifname, "lo0"); /* dummy */
1059         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1060                 perror("ioctl (SIOCGDRLST_IN6)");
1061                 exit(1);
1062         }
1063 #define DR dr.defrouter[i]
1064         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1065                 struct sockaddr_in6 sin6;
1066
1067                 bzero(&sin6, sizeof(sin6));
1068                 sin6.sin6_family = AF_INET6;
1069                 sin6.sin6_len = sizeof(sin6);
1070                 sin6.sin6_addr = DR.rtaddr;
1071                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1072                             sizeof(host_buf), NULL, 0,
1073                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1074
1075                 printf("%s if=%s", host_buf,
1076                        if_indextoname(DR.if_index, ifix_buf));
1077                 printf(", flags=%s%s",
1078                        DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1079                        DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1080                 gettimeofday(&time, 0);
1081                 if (DR.expire == 0)
1082                         printf(", expire=Never\n");
1083                 else
1084                         printf(", expire=%s\n",
1085                                 sec2str(DR.expire - time.tv_sec));
1086         }
1087 #undef DR
1088         close(s);
1089 #endif
1090 }
1091
1092 void
1093 plist()
1094 {
1095 #ifdef ICMPV6CTL_ND6_PRLIST
1096         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1097         char *buf;
1098         struct in6_prefix *p, *ep, *n;
1099         struct sockaddr_in6 *advrtr;
1100         size_t l;
1101         struct timeval time;
1102 #ifdef NI_WITHSCOPEID
1103         const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
1104         int ninflags = (nflag ? NI_NUMERICHOST : 0) | NI_WITHSCOPEID;
1105 #else
1106         const int niflags = NI_NUMERICHOST;
1107         int ninflags = nflag ? NI_NUMERICHOST : 0;
1108 #endif
1109         char namebuf[NI_MAXHOST];
1110
1111         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1112                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1113                 /*NOTREACHED*/
1114         }
1115         buf = malloc(l);
1116         if (!buf) {
1117                 errx(1, "not enough core");
1118                 /*NOTREACHED*/
1119         }
1120         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1121                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1122                 /*NOTREACHED*/
1123         }
1124
1125         ep = (struct in6_prefix *)(buf + l);
1126         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1127                 advrtr = (struct sockaddr_in6 *)(p + 1);
1128                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1129
1130                 if (getnameinfo((struct sockaddr *)&p->prefix,
1131                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1132                     NULL, 0, niflags) != 0)
1133                         strlcpy(namebuf, "?", sizeof(namebuf));
1134                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1135                        if_indextoname(p->if_index, ifix_buf));
1136
1137                 gettimeofday(&time, 0);
1138                 /*
1139                  * meaning of fields, especially flags, is very different
1140                  * by origin.  notify the difference to the users.
1141                  */
1142                 printf("flags=%s%s%s%s%s",
1143                        p->raflags.onlink ? "L" : "",
1144                        p->raflags.autonomous ? "A" : "",
1145                        (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1146                        (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1147 #ifdef NDPRF_HOME
1148                        (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1149 #else
1150                        ""
1151 #endif
1152                        );
1153                 if (p->vltime == ND6_INFINITE_LIFETIME)
1154                         printf(" vltime=infinity");
1155                 else
1156                         printf(" vltime=%ld", (long)p->vltime);
1157                 if (p->pltime == ND6_INFINITE_LIFETIME)
1158                         printf(", pltime=infinity");
1159                 else
1160                         printf(", pltime=%ld", (long)p->pltime);
1161                 if (p->expire == 0)
1162                         printf(", expire=Never");
1163                 else if (p->expire >= time.tv_sec)
1164                         printf(", expire=%s",
1165                                 sec2str(p->expire - time.tv_sec));
1166                 else
1167                         printf(", expired");
1168                 printf(", ref=%d", p->refcnt);
1169                 printf("\n");
1170                 /*
1171                  * "advertising router" list is meaningful only if the prefix
1172                  * information is from RA.
1173                  */
1174                 if (p->advrtrs) {
1175                         int j;
1176                         struct sockaddr_in6 *sin6;
1177
1178                         sin6 = (struct sockaddr_in6 *)(p + 1);
1179                         printf("  advertised by\n");
1180                         for (j = 0; j < p->advrtrs; j++) {
1181                                 struct in6_nbrinfo *nbi;
1182
1183                                 if (getnameinfo((struct sockaddr *)sin6,
1184                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1185                                     NULL, 0, ninflags) != 0)
1186                                         strlcpy(namebuf, "?", sizeof(namebuf));
1187                                 printf("    %s", namebuf);
1188
1189                                 nbi = getnbrinfo(&sin6->sin6_addr, p->if_index,
1190                                                  0);
1191                                 if (nbi) {
1192                                         switch(nbi->state) {
1193                                         case ND6_LLINFO_REACHABLE:
1194                                         case ND6_LLINFO_STALE:
1195                                         case ND6_LLINFO_DELAY:
1196                                         case ND6_LLINFO_PROBE:
1197                                                 printf(" (reachable)\n");
1198                                                 break;
1199                                         default:
1200                                                 printf(" (unreachable)\n");
1201                                         }
1202                                 } else
1203                                         printf(" (no neighbor state)\n");
1204                                 sin6++;
1205                         }
1206                 } else
1207                         printf("  No advertising router\n");
1208         }
1209         free(buf);
1210 #else
1211         struct in6_prlist pr;
1212         int s, i;
1213         struct timeval time;
1214
1215         gettimeofday(&time, 0);
1216
1217         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1218                 perror("ndp: socket");
1219                 exit(1);
1220         }
1221         bzero(&pr, sizeof(pr));
1222         strcpy(pr.ifname, "lo0"); /* dummy */
1223         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1224                 perror("ioctl (SIOCGPRLST_IN6)");
1225                 exit(1);
1226         }
1227 #define PR pr.prefix[i]
1228         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1229                 struct sockaddr_in6 p6;
1230                 char namebuf[NI_MAXHOST];
1231                 int niflags;
1232
1233 #ifdef NDPRF_ONLINK
1234                 p6 = PR.prefix;
1235 #else
1236                 memset(&p6, 0, sizeof(p6));
1237                 p6.sin6_family = AF_INET6;
1238                 p6.sin6_len = sizeof(p6);
1239                 p6.sin6_addr = PR.prefix;
1240 #endif
1241
1242                 /*
1243                  * copy link index to sin6_scope_id field.
1244                  * XXX: KAME specific.
1245                  */
1246                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1247                         u_int16_t linkid;
1248
1249                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1250                                sizeof(linkid));
1251                         linkid = ntohs(linkid);
1252                         p6.sin6_scope_id = linkid;
1253                         p6.sin6_addr.s6_addr[2] = 0;
1254                         p6.sin6_addr.s6_addr[3] = 0;
1255                 }
1256
1257                 niflags = NI_NUMERICHOST;
1258 #ifdef __KAME__
1259                 niflags |= NI_WITHSCOPEID;
1260 #endif
1261                 if (getnameinfo((struct sockaddr *)&p6,
1262                                 sizeof(p6), namebuf, sizeof(namebuf),
1263                                 NULL, 0, niflags)) {
1264                         warnx("getnameinfo failed");
1265                         continue;
1266                 }
1267                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1268                        if_indextoname(PR.if_index, ifix_buf));
1269
1270                 gettimeofday(&time, 0);
1271                 /*
1272                  * meaning of fields, especially flags, is very different
1273                  * by origin.  notify the difference to the users.
1274                  */
1275 #if 0
1276                 printf("  %s",
1277                        PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1278 #endif
1279 #ifdef NDPRF_ONLINK
1280                 printf("flags=%s%s%s%s%s",
1281                        PR.raflags.onlink ? "L" : "",
1282                        PR.raflags.autonomous ? "A" : "",
1283                        (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1284                        (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1285 #ifdef NDPRF_HOME
1286                        (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1287 #else
1288                        ""
1289 #endif
1290                        );
1291 #else
1292                 printf("flags=%s%s",
1293                        PR.raflags.onlink ? "L" : "",
1294                        PR.raflags.autonomous ? "A" : "");
1295 #endif
1296                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1297                         printf(" vltime=infinity");
1298                 else
1299                         printf(" vltime=%ld", (long)PR.vltime);
1300                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1301                         printf(", pltime=infinity");
1302                 else
1303                         printf(", pltime=%ld", (long)PR.pltime);
1304                 if (PR.expire == 0)
1305                         printf(", expire=Never");
1306                 else if (PR.expire >= time.tv_sec)
1307                         printf(", expire=%s",
1308                                 sec2str(PR.expire - time.tv_sec));
1309                 else
1310                         printf(", expired");
1311 #ifdef NDPRF_ONLINK
1312                 printf(", ref=%d", PR.refcnt);
1313 #endif
1314 #if 0
1315                 switch (PR.origin) {
1316                 case PR_ORIG_RA:
1317                         printf(", origin=RA");
1318                         break;
1319                 case PR_ORIG_RR:
1320                         printf(", origin=RR");
1321                         break;
1322                 case PR_ORIG_STATIC:
1323                         printf(", origin=static");
1324                         break;
1325                 case PR_ORIG_KERNEL:
1326                         printf(", origin=kernel");
1327                         break;
1328                 default:
1329                         printf(", origin=?");
1330                         break;
1331                 }
1332 #endif
1333                 printf("\n");
1334                 /*
1335                  * "advertising router" list is meaningful only if the prefix
1336                  * information is from RA.
1337                  */
1338                 if (0 &&        /* prefix origin is almost obsolted */
1339                     PR.origin != PR_ORIG_RA)
1340                         ;
1341                 else if (PR.advrtrs) {
1342                         int j;
1343                         printf("  advertised by\n");
1344                         for (j = 0; j < PR.advrtrs; j++) {
1345                                 struct sockaddr_in6 sin6;
1346                                 struct in6_nbrinfo *nbi;
1347
1348                                 bzero(&sin6, sizeof(sin6));
1349                                 sin6.sin6_family = AF_INET6;
1350                                 sin6.sin6_len = sizeof(sin6);
1351                                 sin6.sin6_addr = PR.advrtr[j];
1352                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1353                                 getnameinfo((struct sockaddr *)&sin6,
1354                                             sin6.sin6_len, host_buf,
1355                                             sizeof(host_buf), NULL, 0,
1356                                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1357                                 printf("    %s", host_buf);
1358
1359                                 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
1360                                                  0);
1361                                 if (nbi) {
1362                                         switch(nbi->state) {
1363                                          case ND6_LLINFO_REACHABLE:
1364                                          case ND6_LLINFO_STALE:
1365                                          case ND6_LLINFO_DELAY:
1366                                          case ND6_LLINFO_PROBE:
1367                                                  printf(" (reachable)\n");
1368                                                  break;
1369                                          default:
1370                                                  printf(" (unreachable)\n");
1371                                         }
1372                                 } else
1373                                         printf(" (no neighbor state)\n");
1374                         }
1375                         if (PR.advrtrs > DRLSTSIZ)
1376                                 printf("    and %d routers\n",
1377                                        PR.advrtrs - DRLSTSIZ);
1378                 } else
1379                         printf("  No advertising router\n");
1380         }
1381 #undef PR
1382         close(s);
1383 #endif
1384 }
1385
1386 void
1387 pfx_flush()
1388 {
1389         char dummyif[IFNAMSIZ+8];
1390         int s;
1391
1392         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1393                 err(1, "socket");
1394         strcpy(dummyif, "lo0"); /* dummy */
1395         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1396                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1397 }
1398
1399 void
1400 rtr_flush()
1401 {
1402         char dummyif[IFNAMSIZ+8];
1403         int s;
1404
1405         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1406                 err(1, "socket");
1407         strcpy(dummyif, "lo0"); /* dummy */
1408         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1409                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1410
1411         close(s);
1412 }
1413
1414 void
1415 harmonize_rtr()
1416 {
1417         char dummyif[IFNAMSIZ+8];
1418         int s;
1419
1420         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1421                 err(1, "socket");
1422         strcpy(dummyif, "lo0"); /* dummy */
1423         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1424                 err(1, "ioctl (SIOCSNDFLUSH_IN6)");
1425
1426         close(s);
1427 }
1428
1429 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1430 static void
1431 setdefif(ifname)
1432         char *ifname;
1433 {
1434         struct in6_ndifreq ndifreq;
1435         unsigned int ifindex;
1436
1437         if (strcasecmp(ifname, "delete") == 0)
1438                 ifindex = 0;
1439         else {
1440                 if ((ifindex = if_nametoindex(ifname)) == 0)
1441                         err(1, "failed to resolve i/f index for %s", ifname);
1442         }
1443
1444         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1445                 err(1, "socket");
1446
1447         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1448         ndifreq.ifindex = ifindex;
1449
1450         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1451                 err(1, "ioctl (SIOCSDEFIFACE_IN6)");
1452
1453         close(s);
1454 }
1455
1456 static void
1457 getdefif()
1458 {
1459         struct in6_ndifreq ndifreq;
1460         char ifname[IFNAMSIZ+8];
1461
1462         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1463                 err(1, "socket");
1464
1465         memset(&ndifreq, 0, sizeof(ndifreq));
1466         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1467
1468         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1469                 err(1, "ioctl (SIOCGDEFIFACE_IN6)");
1470
1471         if (ndifreq.ifindex == 0)
1472                 printf("No default interface.\n");
1473         else {
1474                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1475                         err(1, "failed to resolve ifname for index %lu",
1476                             ndifreq.ifindex);
1477                 printf("ND default interface = %s\n", ifname);
1478         }
1479
1480         close(s);
1481 }
1482 #endif
1483
1484 static char *
1485 sec2str(total)
1486         time_t total;
1487 {
1488         static char result[256];
1489         int days, hours, mins, secs;
1490         int first = 1;
1491         char *p = result;
1492
1493         days = total / 3600 / 24;
1494         hours = (total / 3600) % 24;
1495         mins = (total / 60) % 60;
1496         secs = total % 60;
1497
1498         if (days) {
1499                 first = 0;
1500                 p += sprintf(p, "%dd", days);
1501         }
1502         if (!first || hours) {
1503                 first = 0;
1504                 p += sprintf(p, "%dh", hours);
1505         }
1506         if (!first || mins) {
1507                 first = 0;
1508                 p += sprintf(p, "%dm", mins);
1509         }
1510         sprintf(p, "%ds", secs);
1511
1512         return(result);
1513 }
1514
1515 /*
1516  * Print the timestamp
1517  * from tcpdump/util.c
1518  */
1519 static void
1520 ts_print(tvp)
1521         const struct timeval *tvp;
1522 {
1523         int s;
1524
1525         /* Default */
1526         s = (tvp->tv_sec + thiszone) % 86400;
1527         (void)printf("%02d:%02d:%02d.%06u ",
1528             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1529 }