usr.sbin/ndp/ndp.c

   1 /*      $OpenBSD: ndp.c,v 1.47 2013/03/21 04:43:17 deraadt Exp $        */
   2 /*      $KAME: ndp.c,v 1.101 2002/07/17 08:46:33 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. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  */
  63
  64 /*
  65  * Based on:
  66  * "@(#) Copyright (c) 1984, 1993\n\
  67  *      The Regents of the University of California.  All rights reserved.\n";
  68  *
  69  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  70  */
  71
  72 /*
  73  * ndp - display, set, delete and flush neighbor cache
  74  */
  75
  76
  77 #include <sys/param.h>
  78 #include <sys/file.h>
  79 #include <sys/ioctl.h>
  80 #include <sys/socket.h>
  81 #include <sys/sysctl.h>
  82 #include <sys/time.h>
  83 #include <sys/queue.h>
  84
  85 #include <net/if.h>
  86 #include <net/if_dl.h>
  87 #include <net/if_types.h>
  88 #include <net/route.h>
  89
  90 #include <netinet/in.h>
  91
  92 #include <netinet/icmp6.h>
  93 #include <netinet6/in6_var.h>
  94 #include <netinet6/nd6.h>
  95
  96 #include <arpa/inet.h>
  97
  98 #include <stdio.h>
  99 #include <errno.h>
 100 #include <fcntl.h>
 101 #include <netdb.h>
 102 #include <paths.h>
 103 #include <stdlib.h>
 104 #include <string.h>
 105 #include <unistd.h>
 106 #include <err.h>
 107
 108 #include "gmt2local.h"
 109
 110 /* packing rule for routing socket */
 111 #define ROUNDUP(a) \
 112         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 113 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 114
 115 static pid_t pid;
 116 static int nflag;
 117 static int tflag;
 118 static int32_t thiszone;        /* time difference with gmt */
 119 static int s = -1;
 120 static int repeat = 0;
 121
 122 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 123 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 124 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 125
 126 int file(char *);
 127 void getsocket(void);
 128 int set(int, char **);
 129 void get(char *);
 130 int delete(char *);
 131 void dump(struct in6_addr *, int);
 132 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
 133 static char *ether_str(struct sockaddr_dl *);
 134 int ndp_ether_aton(char *, u_char *);
 135 void usage(void);
 136 int rtmsg(int);
 137 void ifinfo(char *, int, char **);
 138 void rtrlist(void);
 139 void plist(void);
 140 void pfx_flush(void);
 141 void rtrlist(void);
 142 void rtr_flush(void);
 143 void harmonize_rtr(void);
 144 static char *sec2str(time_t);
 145 static char *ether_str(struct sockaddr_dl *);
 146 static void ts_print(const struct timeval *);
 147
 148 #ifdef ICMPV6CTL_ND6_DRLIST
 149 static char *rtpref_str[] = {
 150         "medium",               /* 00 */
 151         "high",                 /* 01 */
 152         "rsv",                  /* 10 */
 153         "low"                   /* 11 */
 154 };
 155 #endif
 156
 157 int mode = 0;
 158 char *arg = NULL;
 159
 160 int
 161 main(int argc, char *argv[])
 162 {
 163         int ch;
 164
 165         pid = getpid();
 166         thiszone = gmt2local(0);
 167         while ((ch = getopt(argc, argv, "acd:f:i:nprstA:HPR")) != -1)
 168                 switch (ch) {
 169                 case 'a':
 170                 case 'c':
 171                 case 'p':
 172                 case 'r':
 173                 case 'H':
 174                 case 'P':
 175                 case 'R':
 176                 case 's':
 177                         if (mode) {
 178                                 usage();
 179                                 /*NOTREACHED*/
 180                         }
 181                         mode = ch;
 182                         arg = NULL;
 183                         break;
 184                 case 'd':
 185                 case 'f':
 186                 case 'i' :
 187                         if (mode) {
 188                                 usage();
 189                                 /*NOTREACHED*/
 190                         }
 191                         mode = ch;
 192                         arg = optarg;
 193                         break;
 194                 case 'n':
 195                         nflag = 1;
 196                         break;
 197                 case 't':
 198                         tflag = 1;
 199                         break;
 200                 case 'A':
 201                         if (mode) {
 202                                 usage();
 203                                 /*NOTREACHED*/
 204                         }
 205                         mode = 'a';
 206                         repeat = atoi(optarg);
 207                         if (repeat < 0) {
 208                                 usage();
 209                                 /*NOTREACHED*/
 210                         }
 211                         break;
 212                 default:
 213                         usage();
 214                 }
 215
 216         argc -= optind;
 217         argv += optind;
 218
 219         switch (mode) {
 220         case 'a':
 221         case 'c':
 222                 if (argc != 0) {
 223                         usage();
 224                         /*NOTREACHED*/
 225                 }
 226                 dump(0, mode == 'c');
 227                 break;
 228         case 'd':
 229                 if (argc != 0) {
 230                         usage();
 231                         /*NOTREACHED*/
 232                 }
 233                 delete(arg);
 234                 break;
 235         case 'p':
 236                 if (argc != 0) {
 237                         usage();
 238                         /*NOTREACHED*/
 239                 }
 240                 plist();
 241                 break;
 242         case 'i':
 243                 ifinfo(arg, argc, argv);
 244                 break;
 245         case 'r':
 246                 if (argc != 0) {
 247                         usage();
 248                         /*NOTREACHED*/
 249                 }
 250                 rtrlist();
 251                 break;
 252         case 's':
 253                 if (argc < 2 || argc > 4)
 254                         usage();
 255                 exit(set(argc, argv) ? 1 : 0);
 256         case 'H':
 257                 if (argc != 0) {
 258                         usage();
 259                         /*NOTREACHED*/
 260                 }
 261                 harmonize_rtr();
 262                 break;
 263         case 'P':
 264                 if (argc != 0) {
 265                         usage();
 266                         /*NOTREACHED*/
 267                 }
 268                 pfx_flush();
 269                 break;
 270         case 'R':
 271                 if (argc != 0) {
 272                         usage();
 273                         /*NOTREACHED*/
 274                 }
 275                 rtr_flush();
 276                 break;
 277         case 0:
 278                 if (argc != 1) {
 279                         usage();
 280                         /*NOTREACHED*/
 281                 }
 282                 get(argv[0]);
 283                 break;
 284         }
 285         exit(0);
 286 }
 287
 288 /*
 289  * Process a file to set standard ndp entries
 290  */
 291 int
 292 file(char *name)
 293 {
 294         FILE *fp;
 295         int i, retval;
 296         char line[100], arg[5][50], *args[5];
 297
 298         if ((fp = fopen(name, "r")) == NULL) {
 299                 fprintf(stderr, "ndp: cannot open %s\n", name);
 300                 exit(1);
 301         }
 302         args[0] = &arg[0][0];
 303         args[1] = &arg[1][0];
 304         args[2] = &arg[2][0];
 305         args[3] = &arg[3][0];
 306         args[4] = &arg[4][0];
 307         retval = 0;
 308         while (fgets(line, sizeof(line), fp) != NULL) {
 309                 i = sscanf(line, "%49s %49s %49s %49s %49s",
 310                     arg[0], arg[1], arg[2], arg[3], arg[4]);
 311                 if (i < 2) {
 312                         fprintf(stderr, "ndp: bad line: %s\n", line);
 313                         retval = 1;
 314                         continue;
 315                 }
 316                 if (set(i, args))
 317                         retval = 1;
 318         }
 319         fclose(fp);
 320         return (retval);
 321 }
 322
 323 void
 324 getsocket(void)
 325 {
 326         if (s < 0) {
 327                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 328                 if (s < 0) {
 329                         err(1, "socket");
 330                         /* NOTREACHED */
 331                 }
 332         }
 333 }
 334
 335 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 336 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 337 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 338 int     expire_time, flags, found_entry;
 339 struct  {
 340         struct  rt_msghdr m_rtm;
 341         char    m_space[512];
 342 }       m_rtmsg;
 343
 344 /*
 345  * Set an individual neighbor cache entry
 346  */
 347 int
 348 set(int argc, char **argv)
 349 {
 350         struct sockaddr_in6 *sin = &sin_m;
 351         struct sockaddr_dl *sdl;
 352         struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 353         struct addrinfo hints, *res;
 354         int gai_error;
 355         u_char *ea;
 356         char *host = argv[0], *eaddr = argv[1];
 357
 358         getsocket();
 359         argc -= 2;
 360         argv += 2;
 361         sdl_m = blank_sdl;
 362         sin_m = blank_sin;
 363
 364         bzero(&hints, sizeof(hints));
 365         hints.ai_family = AF_INET6;
 366         gai_error = getaddrinfo(host, NULL, &hints, &res);
 367         if (gai_error) {
 368                 fprintf(stderr, "ndp: %s: %s\n", host,
 369                         gai_strerror(gai_error));
 370                 return 1;
 371         }
 372         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 373 #ifdef __KAME__
 374         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 375                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 376                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 377         }
 378 #endif
 379         ea = (u_char *)LLADDR(&sdl_m);
 380         if (ndp_ether_aton(eaddr, ea) == 0)
 381                 sdl_m.sdl_alen = 6;
 382         flags = expire_time = 0;
 383         while (argc-- > 0) {
 384                 if (strncmp(argv[0], "temp", 4) == 0) {
 385                         struct timeval time;
 386
 387                         gettimeofday(&time, 0);
 388                         expire_time = time.tv_sec + 20 * 60;
 389                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 390                         flags |= RTF_ANNOUNCE;
 391                 argv++;
 392         }
 393         if (rtmsg(RTM_GET) < 0) {
 394                 errx(1, "RTM_GET(%s) failed", host);
 395                 /* NOTREACHED */
 396         }
 397         sin = (struct sockaddr_in6 *)((char *)rtm + rtm->rtm_hdrlen);
 398         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 399         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 400                 if (sdl->sdl_family == AF_LINK &&
 401                     (rtm->rtm_flags & RTF_LLINFO) &&
 402                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 403                         switch (sdl->sdl_type) {
 404                         case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 405                         case IFT_ISO88024: case IFT_ISO88025:
 406                                 goto overwrite;
 407                         }
 408                 }
 409                 /*
 410                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 411                  */
 412                 fprintf(stderr, "set: cannot configure a new entry\n");
 413                 return 1;
 414         }
 415
 416 overwrite:
 417         if (sdl->sdl_family != AF_LINK) {
 418                 printf("cannot intuit interface index and type for %s\n", host);
 419                 return (1);
 420         }
 421         sdl_m.sdl_type = sdl->sdl_type;
 422         sdl_m.sdl_index = sdl->sdl_index;
 423         return (rtmsg(RTM_ADD));
 424 }
 425
 426 /*
 427  * Display an individual neighbor cache entry
 428  */
 429 void
 430 get(char *host)
 431 {
 432         struct sockaddr_in6 *sin = &sin_m;
 433         struct addrinfo hints, *res;
 434         int gai_error;
 435
 436         sin_m = blank_sin;
 437         bzero(&hints, sizeof(hints));
 438         hints.ai_family = AF_INET6;
 439         gai_error = getaddrinfo(host, NULL, &hints, &res);
 440         if (gai_error) {
 441                 fprintf(stderr, "ndp: %s: %s\n", host,
 442                     gai_strerror(gai_error));
 443                 return;
 444         }
 445         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 446 #ifdef __KAME__
 447         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 448                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 449                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 450         }
 451 #endif
 452         dump(&sin->sin6_addr, 0);
 453         if (found_entry == 0) {
 454                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 455                     sizeof(host_buf), NULL ,0,
 456                     (nflag ? NI_NUMERICHOST : 0));
 457                 printf("%s (%s) -- no entry\n", host, host_buf);
 458                 exit(1);
 459         }
 460 }
 461
 462 /*
 463  * Delete a neighbor cache entry
 464  */
 465 int
 466 delete(char *host)
 467 {
 468         struct sockaddr_in6 *sin = &sin_m;
 469         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 470         struct sockaddr_dl *sdl;
 471         struct addrinfo hints, *res;
 472         int gai_error;
 473
 474         getsocket();
 475         sin_m = blank_sin;
 476
 477         bzero(&hints, sizeof(hints));
 478         hints.ai_family = AF_INET6;
 479         gai_error = getaddrinfo(host, NULL, &hints, &res);
 480         if (gai_error) {
 481                 fprintf(stderr, "ndp: %s: %s\n", host,
 482                     gai_strerror(gai_error));
 483                 return 1;
 484         }
 485         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 486 #ifdef __KAME__
 487         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 488                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 489                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 490         }
 491 #endif
 492         if (rtmsg(RTM_GET) < 0) {
 493                 errx(1, "RTM_GET(%s) failed", host);
 494                 /* NOTREACHED */
 495         }
 496         sin = (struct sockaddr_in6 *)((char *)rtm + rtm->rtm_hdrlen);
 497         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 498         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 499                 if (sdl->sdl_family == AF_LINK &&
 500                     (rtm->rtm_flags & RTF_LLINFO) &&
 501                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 502                         goto delete;
 503                 }
 504                 /*
 505                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 506                  */
 507                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 508                 return 1;
 509         }
 510
 511 delete:
 512         if (sdl->sdl_family != AF_LINK) {
 513                 printf("cannot locate %s\n", host);
 514                 return (1);
 515         }
 516         if (rtmsg(RTM_DELETE) == 0) {
 517                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 518
 519 #ifdef __KAME__
 520                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 521                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 522                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 523                 }
 524 #endif
 525                 getnameinfo((struct sockaddr *)&s6,
 526                     s6.sin6_len, host_buf,
 527                     sizeof(host_buf), NULL, 0,
 528                     (nflag ? NI_NUMERICHOST : 0));
 529                 printf("%s (%s) deleted\n", host, host_buf);
 530         }
 531
 532         return 0;
 533 }
 534
 535 #define W_ADDR  36
 536 #define W_LL    17
 537 #define W_IF    6
 538
 539 /*
 540  * Dump the entire neighbor cache
 541  */
 542 void
 543 dump(struct in6_addr *addr, int cflag)
 544 {
 545         int mib[6];
 546         size_t needed;
 547         char *lim, *buf = NULL, *next;
 548         struct rt_msghdr *rtm;
 549         struct sockaddr_in6 *sin;
 550         struct sockaddr_dl *sdl;
 551         struct in6_nbrinfo *nbi;
 552         struct timeval time;
 553         int addrwidth;
 554         int llwidth;
 555         int ifwidth;
 556         char flgbuf[8];
 557         char *ifname;
 558
 559         /* Print header */
 560         if (!tflag && !cflag)
 561                 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 562                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 563                     W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 564
 565 again:;
 566         mib[0] = CTL_NET;
 567         mib[1] = PF_ROUTE;
 568         mib[2] = 0;
 569         mib[3] = AF_INET6;
 570         mib[4] = NET_RT_FLAGS;
 571         mib[5] = RTF_LLINFO;
 572         while (1) {
 573                 if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1)
 574                         err(1, "sysctl(PF_ROUTE estimate)");
 575                 if (needed == 0)
 576                         break;
 577                 if ((buf = realloc(buf, needed)) == NULL)
 578                         err(1, "realloc");
 579                 if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) {
 580                         if (errno == ENOMEM)
 581                                 continue;
 582                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 583                 }
 584                 lim = buf + needed;
 585                 break;
 586         }
 587
 588         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 589                 int isrouter = 0, prbs = 0;
 590
 591                 rtm = (struct rt_msghdr *)next;
 592                 if (rtm->rtm_version != RTM_VERSION)
 593                         continue;
 594                 sin = (struct sockaddr_in6 *)(next + rtm->rtm_hdrlen);
 595                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 596
 597                 /*
 598                  * Some OSes can produce a route that has the LINK flag but
 599                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 600                  * and BSD/OS, where xx is not the interface identifier on
 601                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 602                  * so we skip them.
 603                  * XXX: such routes should have the GATEWAY flag, not the
 604                  * LINK flag.  However, there is rotten routing software
 605                  * that advertises all routes that have the GATEWAY flag.
 606                  * Thus, KAME kernel intentionally does not set the LINK flag.
 607                  * What is to be fixed is not ndp, but such routing software
 608                  * (and the kernel workaround)...
 609                  */
 610                 if (sdl->sdl_family != AF_LINK)
 611                         continue;
 612
 613                 if (!(rtm->rtm_flags & RTF_HOST))
 614                         continue;
 615
 616                 if (addr) {
 617                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 618                                 continue;
 619                         found_entry = 1;
 620                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 621                         continue;
 622                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 623                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 624                         /* XXX: should scope id be filled in the kernel? */
 625                         if (sin->sin6_scope_id == 0)
 626                                 sin->sin6_scope_id = sdl->sdl_index;
 627 #ifdef __KAME__
 628                         /* KAME specific hack; removed the embedded id */
 629                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 630 #endif
 631                 }
 632                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 633                     sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
 634                 if (cflag) {
 635 #ifdef RTF_WASCLONED
 636                         if (rtm->rtm_flags & RTF_WASCLONED)
 637                                 delete(host_buf);
 638 #elif defined(RTF_CLONED)
 639                         if (rtm->rtm_flags & RTF_CLONED)
 640                                 delete(host_buf);
 641 #else
 642                         delete(host_buf);
 643 #endif
 644                         continue;
 645                 }
 646                 gettimeofday(&time, 0);
 647                 if (tflag)
 648                         ts_print(&time);
 649
 650                 addrwidth = strlen(host_buf);
 651                 if (addrwidth < W_ADDR)
 652                         addrwidth = W_ADDR;
 653                 llwidth = strlen(ether_str(sdl));
 654                 if (W_ADDR + W_LL - addrwidth > llwidth)
 655                         llwidth = W_ADDR + W_LL - addrwidth;
 656                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 657                 if (!ifname)
 658                         ifname = "?";
 659                 ifwidth = strlen(ifname);
 660                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 661                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 662
 663                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 664                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 665
 666                 /* Print neighbor discovery specific informations */
 667                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 668                 if (nbi) {
 669                         if (nbi->expire > time.tv_sec) {
 670                                 printf(" %-9.9s",
 671                                     sec2str(nbi->expire - time.tv_sec));
 672                         } else if (nbi->expire == 0)
 673                                 printf(" %-9.9s", "permanent");
 674                         else
 675                                 printf(" %-9.9s", "expired");
 676
 677                         switch (nbi->state) {
 678                         case ND6_LLINFO_NOSTATE:
 679                                  printf(" N");
 680                                  break;
 681 #ifdef ND6_LLINFO_WAITDELETE
 682                         case ND6_LLINFO_WAITDELETE:
 683                                  printf(" W");
 684                                  break;
 685 #endif
 686                         case ND6_LLINFO_INCOMPLETE:
 687                                  printf(" I");
 688                                  break;
 689                         case ND6_LLINFO_REACHABLE:
 690                                  printf(" R");
 691                                  break;
 692                         case ND6_LLINFO_STALE:
 693                                  printf(" S");
 694                                  break;
 695                         case ND6_LLINFO_DELAY:
 696                                  printf(" D");
 697                                  break;
 698                         case ND6_LLINFO_PROBE:
 699                                  printf(" P");
 700                                  break;
 701                         default:
 702                                  printf(" ?");
 703                                  break;
 704                         }
 705
 706                         isrouter = nbi->isrouter;
 707                         prbs = nbi->asked;
 708                 } else {
 709                         warnx("failed to get neighbor information");
 710                         printf("  ");
 711                 }
 712
 713                 /*
 714                  * other flags. R: router, P: proxy, W: ??
 715                  */
 716                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 717                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 718                             isrouter ? "R" : "",
 719                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 720                 } else {
 721                         sin = (struct sockaddr_in6 *)
 722                             (sdl->sdl_len + (char *)sdl);
 723 #if 0   /* W and P are mystery even for us */
 724                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 725                             isrouter ? "R" : "",
 726                             !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 727                             (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 728                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 729 #else
 730                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 731                             isrouter ? "R" : "",
 732                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 733 #endif
 734                 }
 735                 printf(" %s", flgbuf);
 736
 737                 if (prbs)
 738                         printf(" %d", prbs);
 739
 740                 printf("\n");
 741         }
 742         if (buf != NULL)
 743                 free(buf);
 744
 745         if (repeat) {
 746                 printf("\n");
 747                 fflush(stdout);
 748                 sleep(repeat);
 749                 goto again;
 750         }
 751 }
 752
 753 static struct in6_nbrinfo *
 754 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
 755 {
 756         static struct in6_nbrinfo nbi;
 757         int s;
 758
 759         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 760                 err(1, "socket");
 761
 762         bzero(&nbi, sizeof(nbi));
 763         if_indextoname(ifindex, nbi.ifname);
 764         nbi.addr = *addr;
 765         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 766                 if (warning)
 767                         warn("ioctl(SIOCGNBRINFO_IN6)");
 768                 close(s);
 769                 return(NULL);
 770         }
 771
 772         close(s);
 773         return(&nbi);
 774 }
 775
 776 static char *
 777 ether_str(struct sockaddr_dl *sdl)
 778 {
 779         static char hbuf[NI_MAXHOST];
 780         u_char *cp;
 781
 782         if (sdl->sdl_alen) {
 783                 cp = (u_char *)LLADDR(sdl);
 784                 snprintf(hbuf, sizeof(hbuf), "%x:%x:%x:%x:%x:%x",
 785                     cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 786         } else
 787                 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
 788
 789         return(hbuf);
 790 }
 791
 792 int
 793 ndp_ether_aton(char *a, u_char *n)
 794 {
 795         int i, o[6];
 796
 797         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 798             &o[3], &o[4], &o[5]);
 799         if (i != 6) {
 800                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 801                 return (1);
 802         }
 803         for (i = 0; i < 6; i++)
 804                 n[i] = o[i];
 805         return (0);
 806 }
 807
 808 void
 809 usage(void)
 810 {
 811         printf("usage: ndp [-nrt] [-a | -c | -p] [-H | -P | -R] ");
 812         printf("[-A wait] [-d hostname]\n");
 813         printf("\t[-f filename] ");
 814         printf("[-i interface [flag ...]]\n");
 815         printf("\t[-s nodename etheraddr [temp] [proxy]] [hostname]\n");
 816         exit(1);
 817 }
 818
 819 int
 820 rtmsg(int cmd)
 821 {
 822         static int seq;
 823         int rlen;
 824         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 825         char *cp = m_rtmsg.m_space;
 826         int l;
 827
 828         errno = 0;
 829         if (cmd == RTM_DELETE)
 830                 goto doit;
 831         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 832         rtm->rtm_flags = flags;
 833         rtm->rtm_version = RTM_VERSION;
 834
 835         switch (cmd) {
 836         default:
 837                 fprintf(stderr, "ndp: internal wrong cmd\n");
 838                 exit(1);
 839         case RTM_ADD:
 840                 rtm->rtm_addrs |= RTA_GATEWAY;
 841                 if (expire_time) {
 842                         rtm->rtm_rmx.rmx_expire = expire_time;
 843                         rtm->rtm_inits = RTV_EXPIRE;
 844                 }
 845                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 846 #if 0   /* we don't support ipv6addr/128 type proxying. */
 847                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 848                         rtm->rtm_flags &= ~RTF_HOST;
 849                         rtm->rtm_addrs |= RTA_NETMASK;
 850                 }
 851 #endif
 852                 /* FALLTHROUGH */
 853         case RTM_GET:
 854                 rtm->rtm_addrs |= RTA_DST;
 855         }
 856 #define NEXTADDR(w, s) \
 857         if (rtm->rtm_addrs & (w)) { \
 858                 bcopy((char *)&s, cp, sizeof(s)); cp += ROUNDUP(sizeof(s));}
 859
 860         NEXTADDR(RTA_DST, sin_m);
 861         NEXTADDR(RTA_GATEWAY, sdl_m);
 862 #if 0   /* we don't support ipv6addr/128 type proxying. */
 863         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 864         NEXTADDR(RTA_NETMASK, so_mask);
 865 #endif
 866
 867         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 868 doit:
 869         l = rtm->rtm_msglen;
 870         rtm->rtm_seq = ++seq;
 871         rtm->rtm_type = cmd;
 872         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 873                 if (errno != ESRCH || cmd != RTM_DELETE) {
 874                         err(1, "writing to routing socket");
 875                         /* NOTREACHED */
 876                 }
 877         }
 878         do {
 879                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 880         } while (l > 0 && (rtm->rtm_version != RTM_VERSION ||
 881             rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 882         if (l < 0)
 883                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 884                     strerror(errno));
 885         return (0);
 886 }
 887
 888 void
 889 ifinfo(char *ifname, int argc, char **argv)
 890 {
 891         struct in6_ndireq nd;
 892         int i, s;
 893         u_int32_t newflags;
 894 #ifdef IPV6CTL_USETEMPADDR
 895         u_int8_t nullbuf[8];
 896 #endif
 897
 898         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 899                 err(1, "socket");
 900                 /* NOTREACHED */
 901         }
 902         bzero(&nd, sizeof(nd));
 903         strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
 904         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 905                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 906                 /* NOTREACHED */
 907         }
 908 #define ND nd.ndi
 909         newflags = ND.flags;
 910         for (i = 0; i < argc; i++) {
 911                 int clear = 0;
 912                 char *cp = argv[i];
 913
 914                 if (*cp == '-') {
 915                         clear = 1;
 916                         cp++;
 917                 }
 918
 919 #define SETFLAG(s, f) \
 920         do {\
 921                 if (strcmp(cp, (s)) == 0) {\
 922                         if (clear)\
 923                                 newflags &= ~(f);\
 924                         else\
 925                                 newflags |= (f);\
 926                 }\
 927         } while (0)
 928                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 929 #ifdef ND6_IFF_ACCEPT_RTADV
 930                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 931 #endif
 932 #ifdef ND6_IFF_PREFER_SOURCE
 933                 SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
 934 #endif
 935
 936                 ND.flags = newflags;
 937                 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
 938                         err(1, "ioctl(SIOCSIFINFO_FLAGS)");
 939                         /* NOTREACHED */
 940                 }
 941 #undef SETFLAG
 942         }
 943
 944         if (!ND.initialized) {
 945                 errx(1, "%s: not initialized yet", ifname);
 946                 /* NOTREACHED */
 947         }
 948
 949         printf("linkmtu=%d", ND.linkmtu);
 950         printf(", curhlim=%d", ND.chlim);
 951         printf(", basereachable=%ds%dms",
 952             ND.basereachable / 1000, ND.basereachable % 1000);
 953         printf(", reachable=%ds", ND.reachable);
 954         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
 955 #ifdef IPV6CTL_USETEMPADDR
 956         memset(nullbuf, 0, sizeof(nullbuf));
 957         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
 958                 int j;
 959                 u_int8_t *rbuf;
 960
 961                 for (i = 0; i < 3; i++) {
 962                         switch (i) {
 963                         case 0:
 964                                 printf("\nRandom seed(0): ");
 965                                 rbuf = ND.randomseed0;
 966                                 break;
 967                         case 1:
 968                                 printf("\nRandom seed(1): ");
 969                                 rbuf = ND.randomseed1;
 970                                 break;
 971                         case 2:
 972                                 printf("\nRandom ID:      ");
 973                                 rbuf = ND.randomid;
 974                                 break;
 975                         }
 976                         for (j = 0; j < 8; j++)
 977                                 printf("%02x", rbuf[j]);
 978                 }
 979         }
 980 #endif
 981         if (ND.flags) {
 982                 printf("\nFlags: ");
 983                 if ((ND.flags & ND6_IFF_PERFORMNUD))
 984                         printf("nud ");
 985 #ifdef ND6_IFF_ACCEPT_RTADV
 986                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
 987                         printf("accept_rtadv ");
 988 #endif
 989 #ifdef ND6_IFF_PREFER_SOURCE
 990                 if ((ND.flags & ND6_IFF_PREFER_SOURCE))
 991                         printf("prefer_source ");
 992 #endif
 993         }
 994         putc('\n', stdout);
 995 #undef ND
 996
 997         close(s);
 998 }
 999
1000 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1001 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1002 #endif
1003
1004 void
1005 rtrlist(void)
1006 {
1007 #ifdef ICMPV6CTL_ND6_DRLIST
1008         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1009         char *buf;
1010         struct in6_defrouter *p, *ep;
1011         size_t l;
1012         struct timeval time;
1013
1014         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1015                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1016                 /*NOTREACHED*/
1017         }
1018         if (l == 0)
1019                 return;
1020         buf = malloc(l);
1021         if (buf == NULL) {
1022                 err(1, "malloc");
1023                 /*NOTREACHED*/
1024         }
1025         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1026                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1027                 /*NOTREACHED*/
1028         }
1029
1030         ep = (struct in6_defrouter *)(buf + l);
1031         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1032                 int rtpref;
1033
1034                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1035                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1036                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1037                         strlcpy(host_buf, "?", sizeof(host_buf));
1038
1039                 printf("%s if=%s", host_buf,
1040                     if_indextoname(p->if_index, ifix_buf));
1041                 printf(", flags=%s%s",
1042                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1043                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1044                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1045                 printf(", pref=%s", rtpref_str[rtpref]);
1046
1047                 gettimeofday(&time, 0);
1048                 if (p->expire == 0)
1049                         printf(", expire=Never\n");
1050                 else
1051                         printf(", expire=%s\n",
1052                             sec2str(p->expire - time.tv_sec));
1053         }
1054         free(buf);
1055 #else
1056         struct in6_drlist dr;
1057         int s, i;
1058         struct timeval time;
1059
1060         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1061                 err(1, "socket");
1062                 /* NOTREACHED */
1063         }
1064         bzero(&dr, sizeof(dr));
1065         strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1066         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1067                 err(1, "ioctl(SIOCGDRLST_IN6)");
1068                 /* NOTREACHED */
1069         }
1070 #define DR dr.defrouter[i]
1071         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1072                 struct sockaddr_in6 sin6;
1073
1074                 bzero(&sin6, sizeof(sin6));
1075                 sin6.sin6_family = AF_INET6;
1076                 sin6.sin6_len = sizeof(sin6);
1077                 sin6.sin6_addr = DR.rtaddr;
1078                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1079                     sizeof(host_buf), NULL, 0,
1080                     (nflag ? NI_NUMERICHOST : 0));
1081
1082                 printf("%s if=%s", host_buf,
1083                     if_indextoname(DR.if_index, ifix_buf));
1084                 printf(", flags=%s%s",
1085                     DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1086                     DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1087                 gettimeofday(&time, 0);
1088                 if (DR.expire == 0)
1089                         printf(", expire=Never\n");
1090                 else
1091                         printf(", expire=%s\n",
1092                             sec2str(DR.expire - time.tv_sec));
1093         }
1094 #undef DR
1095         close(s);
1096 #endif
1097 }
1098
1099 void
1100 plist(void)
1101 {
1102 #ifdef ICMPV6CTL_ND6_PRLIST
1103         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1104         char *buf;
1105         struct in6_prefix *p, *ep, *n;
1106         struct sockaddr_in6 *advrtr;
1107         size_t l;
1108         struct timeval time;
1109         const int niflags = NI_NUMERICHOST;
1110         int ninflags = nflag ? NI_NUMERICHOST : 0;
1111         char namebuf[NI_MAXHOST];
1112
1113         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1114                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1115                 /*NOTREACHED*/
1116         }
1117         buf = malloc(l);
1118         if (buf == NULL) {
1119                 err(1, "malloc");
1120                 /*NOTREACHED*/
1121         }
1122         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1123                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1124                 /*NOTREACHED*/
1125         }
1126
1127         ep = (struct in6_prefix *)(buf + l);
1128         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1129                 advrtr = (struct sockaddr_in6 *)(p + 1);
1130                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1131
1132                 if (getnameinfo((struct sockaddr *)&p->prefix,
1133                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1134                     NULL, 0, niflags) != 0)
1135                         strlcpy(namebuf, "?", sizeof(namebuf));
1136                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1137                     if_indextoname(p->if_index, ifix_buf));
1138
1139                 gettimeofday(&time, 0);
1140                 /*
1141                  * meaning of fields, especially flags, is very different
1142                  * by origin.  notify the difference to the users.
1143                  */
1144                 printf("flags=%s%s%s%s%s",
1145                     p->raflags.onlink ? "L" : "",
1146                     p->raflags.autonomous ? "A" : "",
1147                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1148                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1149 #ifdef NDPRF_HOME
1150                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1151 #else
1152                     ""
1153 #endif
1154                     );
1155                 if (p->vltime == ND6_INFINITE_LIFETIME)
1156                         printf(" vltime=infinity");
1157                 else
1158                         printf(" vltime=%lu", (unsigned long)p->vltime);
1159                 if (p->pltime == ND6_INFINITE_LIFETIME)
1160                         printf(", pltime=infinity");
1161                 else
1162                         printf(", pltime=%lu", (unsigned long)p->pltime);
1163                 if (p->expire == 0)
1164                         printf(", expire=Never");
1165                 else if (p->expire >= time.tv_sec)
1166                         printf(", expire=%s",
1167                             sec2str(p->expire - time.tv_sec));
1168                 else
1169                         printf(", expired");
1170                 printf(", ref=%d", p->refcnt);
1171                 printf("\n");
1172                 /*
1173                  * "advertising router" list is meaningful only if the prefix
1174                  * information is from RA.
1175                  */
1176                 if (p->advrtrs) {
1177                         int j;
1178                         struct sockaddr_in6 *sin6;
1179
1180                         sin6 = advrtr;
1181                         printf("  advertised by\n");
1182                         for (j = 0; j < p->advrtrs; j++) {
1183                                 struct in6_nbrinfo *nbi;
1184
1185                                 if (getnameinfo((struct sockaddr *)sin6,
1186                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1187                                     NULL, 0, ninflags) != 0)
1188                                         strlcpy(namebuf, "?", sizeof(namebuf));
1189                                 printf("    %s", namebuf);
1190
1191                                 nbi = getnbrinfo(&sin6->sin6_addr,
1192                                     p->if_index, 0);
1193                                 if (nbi) {
1194                                         switch (nbi->state) {
1195                                         case ND6_LLINFO_REACHABLE:
1196                                         case ND6_LLINFO_STALE:
1197                                         case ND6_LLINFO_DELAY:
1198                                         case ND6_LLINFO_PROBE:
1199                                                 printf(" (reachable)\n");
1200                                                 break;
1201                                         default:
1202                                                 printf(" (unreachable)\n");
1203                                         }
1204                                 } else
1205                                         printf(" (no neighbor state)\n");
1206                                 sin6++;
1207                         }
1208                 } else
1209                         printf("  No advertising router\n");
1210         }
1211         free(buf);
1212 #else
1213         struct in6_prlist pr;
1214         int s, i;
1215         struct timeval time;
1216
1217         gettimeofday(&time, 0);
1218
1219         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1220                 err(1, "socket");
1221                 /* NOTREACHED */
1222         }
1223         bzero(&pr, sizeof(pr));
1224         strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1225         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1226                 err(1, "ioctl(SIOCGPRLST_IN6)");
1227                 /* NOTREACHED */
1228         }
1229 #define PR pr.prefix[i]
1230         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1231                 struct sockaddr_in6 p6;
1232                 char namebuf[NI_MAXHOST];
1233                 int niflags;
1234
1235 #ifdef NDPRF_ONLINK
1236                 p6 = PR.prefix;
1237 #else
1238                 memset(&p6, 0, sizeof(p6));
1239                 p6.sin6_family = AF_INET6;
1240                 p6.sin6_len = sizeof(p6);
1241                 p6.sin6_addr = PR.prefix;
1242 #endif
1243
1244                 /*
1245                  * copy link index to sin6_scope_id field.
1246                  * XXX: KAME specific.
1247                  */
1248                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1249                         u_int16_t linkid;
1250
1251                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1252                             sizeof(linkid));
1253                         linkid = ntohs(linkid);
1254                         p6.sin6_scope_id = linkid;
1255                         p6.sin6_addr.s6_addr[2] = 0;
1256                         p6.sin6_addr.s6_addr[3] = 0;
1257                 }
1258
1259                 niflags = NI_NUMERICHOST;
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=%lu", PR.vltime);
1299                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1300                         printf(", pltime=infinity");
1301                 else
1302                         printf(", pltime=%lu", 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                                     (nflag ? NI_NUMERICHOST : 0));
1356                                 printf("    %s", host_buf);
1357
1358                                 nbi = getnbrinfo(&sin6.sin6_addr,
1359                                     PR.if_index, 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(void)
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         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1394         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1395                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1396         close(s);
1397 }
1398
1399 void
1400 rtr_flush(void)
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         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* 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(void)
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         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1423         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1424                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1425
1426         close(s);
1427 }
1428
1429 static char *
1430 sec2str(time_t total)
1431 {
1432         static char result[256];
1433         int days, hours, mins, secs;
1434         int first = 1;
1435         char *p = result;
1436         char *ep = &result[sizeof(result)];
1437         int n;
1438
1439         days = total / 3600 / 24;
1440         hours = (total / 3600) % 24;
1441         mins = (total / 60) % 60;
1442         secs = total % 60;
1443
1444         if (days) {
1445                 first = 0;
1446                 n = snprintf(p, ep - p, "%dd", days);
1447                 if (n < 0 || n >= ep - p)
1448                         return "?";
1449                 p += n;
1450         }
1451         if (!first || hours) {
1452                 first = 0;
1453                 n = snprintf(p, ep - p, "%dh", hours);
1454                 if (n < 0 || n >= ep - p)
1455                         return "?";
1456                 p += n;
1457         }
1458         if (!first || mins) {
1459                 first = 0;
1460                 n = snprintf(p, ep - p, "%dm", mins);
1461                 if (n < 0 || n >= ep - p)
1462                         return "?";
1463                 p += n;
1464         }
1465         snprintf(p, ep - p, "%ds", secs);
1466
1467         return(result);
1468 }
1469
1470 /*
1471  * Print the timestamp
1472  * from tcpdump/util.c
1473  */
1474 static void
1475 ts_print(const struct timeval *tvp)
1476 {
1477         int s;
1478
1479         /* Default */
1480         s = (tvp->tv_sec + thiszone) % 86400;
1481         (void)printf("%02d:%02d:%02d.%06u ",
1482             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1483 }