usr.sbin/ndp/ndp.c

   1 /*      $FreeBSD$       */
   2 /*      $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $   */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 /*
  33  * Copyright (c) 1984, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * Sun Microsystems, Inc.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  */
  63
  64 /*
  65  * Based on:
  66  * "@(#) Copyright (c) 1984, 1993\n\
  67  *      The Regents of the University of California.  All rights reserved.\n";
  68  *
  69  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  70  */
  71
  72 /*
  73  * ndp - display, set, delete and flush neighbor cache
  74  */
  75
  76
  77 #include <sys/param.h>
  78 #include <sys/file.h>
  79 #include <sys/ioctl.h>
  80 #include <sys/socket.h>
  81 #include <sys/sysctl.h>
  82 #include <sys/time.h>
  83 #include <sys/queue.h>
  84
  85 #include <net/if.h>
  86 #include <net/if_var.h>
  87 #include <net/if_dl.h>
  88 #include <net/if_types.h>
  89 #include <net/route.h>
  90
  91 #include <netinet/in.h>
  92 #include <netinet/if_ether.h>
  93
  94 #include <netinet/icmp6.h>
  95 #include <netinet6/in6_var.h>
  96 #include <netinet6/nd6.h>
  97
  98 #include <arpa/inet.h>
  99
 100 #include <ctype.h>
 101 #include <netdb.h>
 102 #include <errno.h>
 103 #include <nlist.h>
 104 #include <stdio.h>
 105 #include <string.h>
 106 #include <paths.h>
 107 #include <err.h>
 108 #include <stdlib.h>
 109 #include <fcntl.h>
 110 #include <unistd.h>
 111 #include "gmt2local.h"
 112
 113 /* packing rule for routing socket */
 114 #define ROUNDUP(a) \
 115         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 116 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 117
 118 #define NEXTADDR(w, s) \
 119         if (rtm->rtm_addrs & (w)) { \
 120                 bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);}
 121
 122
 123 static pid_t pid;
 124 static int nflag;
 125 static int tflag;
 126 static int32_t thiszone;        /* time difference with gmt */
 127 static int s = -1;
 128 static int repeat = 0;
 129
 130 static char host_buf[NI_MAXHOST];       /* getnameinfo() */
 131 static char ifix_buf[IFNAMSIZ];         /* if_indextoname() */
 132
 133 static int file(char *);
 134 static void getsocket(void);
 135 static int set(int, char **);
 136 static void get(char *);
 137 static int delete(char *);
 138 static void dump(struct sockaddr_in6 *, int);
 139 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
 140 static char *ether_str(struct sockaddr_dl *);
 141 static int ndp_ether_aton(char *, u_char *);
 142 static void usage(void);
 143 static int rtmsg(int);
 144 static void ifinfo(char *, int, char **);
 145 static void rtrlist(void);
 146 static void plist(void);
 147 static void pfx_flush(void);
 148 static void rtr_flush(void);
 149 static void harmonize_rtr(void);
 150 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 151 static void getdefif(void);
 152 static void setdefif(char *);
 153 #endif
 154 static char *sec2str(time_t);
 155 static void ts_print(const struct timeval *);
 156
 157 static char *rtpref_str[] = {
 158         "medium",               /* 00 */
 159         "high",                 /* 01 */
 160         "rsv",                  /* 10 */
 161         "low"                   /* 11 */
 162 };
 163
 164 int
 165 main(int argc, char **argv)
 166 {
 167         int ch, mode = 0;
 168         char *arg = NULL;
 169
 170         pid = getpid();
 171         thiszone = gmt2local(0);
 172         while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
 173                 switch (ch) {
 174                 case 'a':
 175                 case 'c':
 176                 case 'p':
 177                 case 'r':
 178                 case 'H':
 179                 case 'P':
 180                 case 'R':
 181                 case 's':
 182                 case 'I':
 183                         if (mode) {
 184                                 usage();
 185                                 /*NOTREACHED*/
 186                         }
 187                         mode = ch;
 188                         arg = NULL;
 189                         break;
 190                 case 'f':
 191                         exit(file(optarg) ? 1 : 0);
 192                 case 'd':
 193                 case 'i':
 194                         if (mode) {
 195                                 usage();
 196                                 /*NOTREACHED*/
 197                         }
 198                         mode = ch;
 199                         arg = optarg;
 200                         break;
 201                 case 'n':
 202                         nflag = 1;
 203                         break;
 204                 case 't':
 205                         tflag = 1;
 206                         break;
 207                 case 'A':
 208                         if (mode) {
 209                                 usage();
 210                                 /*NOTREACHED*/
 211                         }
 212                         mode = 'a';
 213                         repeat = atoi(optarg);
 214                         if (repeat < 0) {
 215                                 usage();
 216                                 /*NOTREACHED*/
 217                         }
 218                         break;
 219                 default:
 220                         usage();
 221                 }
 222
 223         argc -= optind;
 224         argv += optind;
 225
 226         switch (mode) {
 227         case 'a':
 228         case 'c':
 229                 if (argc != 0) {
 230                         usage();
 231                         /*NOTREACHED*/
 232                 }
 233                 dump(0, mode == 'c');
 234                 break;
 235         case 'd':
 236                 if (argc != 0) {
 237                         usage();
 238                         /*NOTREACHED*/
 239                 }
 240                 delete(arg);
 241                 break;
 242         case 'I':
 243 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 244                 if (argc > 1) {
 245                         usage();
 246                         /*NOTREACHED*/
 247                 } else if (argc == 1) {
 248                         if (strcmp(*argv, "delete") == 0 ||
 249                             if_nametoindex(*argv))
 250                                 setdefif(*argv);
 251                         else
 252                                 errx(1, "invalid interface %s", *argv);
 253                 }
 254                 getdefif(); /* always call it to print the result */
 255                 break;
 256 #else
 257                 errx(1, "not supported yet");
 258                 /*NOTREACHED*/
 259 #endif
 260         case 'p':
 261                 if (argc != 0) {
 262                         usage();
 263                         /*NOTREACHED*/
 264                 }
 265                 plist();
 266                 break;
 267         case 'i':
 268                 ifinfo(arg, argc, argv);
 269                 break;
 270         case 'r':
 271                 if (argc != 0) {
 272                         usage();
 273                         /*NOTREACHED*/
 274                 }
 275                 rtrlist();
 276                 break;
 277         case 's':
 278                 if (argc < 2 || argc > 4)
 279                         usage();
 280                 exit(set(argc, argv) ? 1 : 0);
 281         case 'H':
 282                 if (argc != 0) {
 283                         usage();
 284                         /*NOTREACHED*/
 285                 }
 286                 harmonize_rtr();
 287                 break;
 288         case 'P':
 289                 if (argc != 0) {
 290                         usage();
 291                         /*NOTREACHED*/
 292                 }
 293                 pfx_flush();
 294                 break;
 295         case 'R':
 296                 if (argc != 0) {
 297                         usage();
 298                         /*NOTREACHED*/
 299                 }
 300                 rtr_flush();
 301                 break;
 302         case 0:
 303                 if (argc != 1) {
 304                         usage();
 305                         /*NOTREACHED*/
 306                 }
 307                 get(argv[0]);
 308                 break;
 309         }
 310         exit(0);
 311 }
 312
 313 /*
 314  * Process a file to set standard ndp entries
 315  */
 316 static int
 317 file(char *name)
 318 {
 319         FILE *fp;
 320         int i, retval;
 321         char line[100], arg[5][50], *args[5], *p;
 322
 323         if ((fp = fopen(name, "r")) == NULL)
 324                 err(1, "cannot open %s", name);
 325         args[0] = &arg[0][0];
 326         args[1] = &arg[1][0];
 327         args[2] = &arg[2][0];
 328         args[3] = &arg[3][0];
 329         args[4] = &arg[4][0];
 330         retval = 0;
 331         while (fgets(line, sizeof(line), fp) != NULL) {
 332                 if ((p = strchr(line, '#')) != NULL)
 333                         *p = '\0';
 334                 for (p = line; isblank(*p); p++);
 335                 if (*p == '\n' || *p == '\0')
 336                         continue;
 337                 i = sscanf(line, "%49s %49s %49s %49s %49s",
 338                     arg[0], arg[1], arg[2], arg[3], arg[4]);
 339                 if (i < 2) {
 340                         warnx("bad line: %s", line);
 341                         retval = 1;
 342                         continue;
 343                 }
 344                 if (set(i, args))
 345                         retval = 1;
 346         }
 347         fclose(fp);
 348         return (retval);
 349 }
 350
 351 static void
 352 getsocket()
 353 {
 354         if (s < 0) {
 355                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 356                 if (s < 0) {
 357                         err(1, "socket");
 358                         /* NOTREACHED */
 359                 }
 360         }
 361 }
 362
 363 static struct sockaddr_in6 so_mask = {
 364         .sin6_len = sizeof(so_mask),
 365         .sin6_family = AF_INET6
 366 };
 367 static struct sockaddr_in6 blank_sin = {
 368         .sin6_len = sizeof(blank_sin),
 369         .sin6_family = AF_INET6
 370 };
 371 static struct sockaddr_in6 sin_m;
 372 static struct sockaddr_dl blank_sdl = {
 373         .sdl_len = sizeof(blank_sdl),
 374         .sdl_family = AF_LINK
 375 };
 376 static struct sockaddr_dl sdl_m;
 377 static time_t expire_time;
 378 static int flags, found_entry;
 379 static struct {
 380         struct  rt_msghdr m_rtm;
 381         char    m_space[512];
 382 } m_rtmsg;
 383
 384 /*
 385  * Set an individual neighbor cache entry
 386  */
 387 static int
 388 set(int argc, char **argv)
 389 {
 390         register struct sockaddr_in6 *sin = &sin_m;
 391         register struct sockaddr_dl *sdl;
 392         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 393         struct addrinfo hints, *res;
 394         int gai_error;
 395         u_char *ea;
 396         char *host = argv[0], *eaddr = argv[1];
 397
 398         getsocket();
 399         argc -= 2;
 400         argv += 2;
 401         sdl_m = blank_sdl;
 402         sin_m = blank_sin;
 403
 404         bzero(&hints, sizeof(hints));
 405         hints.ai_family = AF_INET6;
 406         gai_error = getaddrinfo(host, NULL, &hints, &res);
 407         if (gai_error) {
 408                 fprintf(stderr, "ndp: %s: %s\n", host,
 409                         gai_strerror(gai_error));
 410                 return 1;
 411         }
 412         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 413         sin->sin6_scope_id =
 414             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 415         ea = (u_char *)LLADDR(&sdl_m);
 416         if (ndp_ether_aton(eaddr, ea) == 0)
 417                 sdl_m.sdl_alen = 6;
 418         flags = expire_time = 0;
 419         while (argc-- > 0) {
 420                 if (strncmp(argv[0], "temp", 4) == 0) {
 421                         struct timeval now;
 422
 423                         gettimeofday(&now, 0);
 424                         expire_time = now.tv_sec + 20 * 60;
 425                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 426                         flags |= RTF_ANNOUNCE;
 427                 argv++;
 428         }
 429         if (rtmsg(RTM_GET) < 0) {
 430                 errx(1, "RTM_GET(%s) failed", host);
 431                 /* NOTREACHED */
 432         }
 433         sin = (struct sockaddr_in6 *)(rtm + 1);
 434         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 435         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 436                 if (sdl->sdl_family == AF_LINK &&
 437                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 438                         switch (sdl->sdl_type) {
 439                         case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 440                         case IFT_ISO88024: case IFT_ISO88025:
 441                         case IFT_L2VLAN: case IFT_BRIDGE:
 442                                 goto overwrite;
 443                         }
 444                 }
 445                 fprintf(stderr, "set: cannot configure a new entry\n");
 446                 return 1;
 447         }
 448
 449 overwrite:
 450         if (sdl->sdl_family != AF_LINK) {
 451                 printf("cannot intuit interface index and type for %s\n", host);
 452                 return (1);
 453         }
 454         sdl_m.sdl_type = sdl->sdl_type;
 455         sdl_m.sdl_index = sdl->sdl_index;
 456         return (rtmsg(RTM_ADD));
 457 }
 458
 459 /*
 460  * Display an individual neighbor cache entry
 461  */
 462 static void
 463 get(char *host)
 464 {
 465         struct sockaddr_in6 *sin = &sin_m;
 466         struct addrinfo hints, *res;
 467         int gai_error;
 468
 469         sin_m = blank_sin;
 470         bzero(&hints, sizeof(hints));
 471         hints.ai_family = AF_INET6;
 472         gai_error = getaddrinfo(host, NULL, &hints, &res);
 473         if (gai_error) {
 474                 fprintf(stderr, "ndp: %s: %s\n", host,
 475                     gai_strerror(gai_error));
 476                 return;
 477         }
 478         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 479         sin->sin6_scope_id =
 480             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 481         dump(sin, 0);
 482         if (found_entry == 0) {
 483                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 484                     sizeof(host_buf), NULL ,0,
 485                     (nflag ? NI_NUMERICHOST : 0));
 486                 printf("%s (%s) -- no entry\n", host, host_buf);
 487                 exit(1);
 488         }
 489 }
 490
 491 /*
 492  * Delete a neighbor cache entry
 493  */
 494 static int
 495 delete(char *host)
 496 {
 497         struct sockaddr_in6 *sin = &sin_m;
 498         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 499         register char *cp = m_rtmsg.m_space;
 500         struct sockaddr_dl *sdl;
 501         struct addrinfo hints, *res;
 502         int gai_error;
 503
 504         getsocket();
 505         sin_m = blank_sin;
 506
 507         bzero(&hints, sizeof(hints));
 508         hints.ai_family = AF_INET6;
 509         gai_error = getaddrinfo(host, NULL, &hints, &res);
 510         if (gai_error) {
 511                 fprintf(stderr, "ndp: %s: %s\n", host,
 512                     gai_strerror(gai_error));
 513                 return 1;
 514         }
 515         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 516         sin->sin6_scope_id =
 517             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 518         if (rtmsg(RTM_GET) < 0) {
 519                 errx(1, "RTM_GET(%s) failed", host);
 520                 /* NOTREACHED */
 521         }
 522         sin = (struct sockaddr_in6 *)(rtm + 1);
 523         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 524         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 525                 if (sdl->sdl_family == AF_LINK &&
 526                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 527                         goto delete;
 528                 }
 529                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 530                 return 1;
 531         }
 532
 533 delete:
 534         if (sdl->sdl_family != AF_LINK) {
 535                 printf("cannot locate %s\n", host);
 536                 return (1);
 537         }
 538         /*
 539          * need to reinit the field because it has rt_key
 540          * but we want the actual address
 541          */
 542         NEXTADDR(RTA_DST, sin_m);
 543         rtm->rtm_flags |= RTF_LLDATA;
 544         if (rtmsg(RTM_DELETE) == 0) {
 545                 getnameinfo((struct sockaddr *)sin,
 546                     sin->sin6_len, host_buf,
 547                     sizeof(host_buf), NULL, 0,
 548                     (nflag ? NI_NUMERICHOST : 0));
 549                 printf("%s (%s) deleted\n", host, host_buf);
 550         }
 551
 552         return 0;
 553 }
 554
 555 #define W_ADDR  36
 556 #define W_LL    17
 557 #define W_IF    6
 558
 559 /*
 560  * Dump the entire neighbor cache
 561  */
 562 static void
 563 dump(struct sockaddr_in6 *addr, int cflag)
 564 {
 565         int mib[6];
 566         size_t needed;
 567         char *lim, *buf, *next;
 568         struct rt_msghdr *rtm;
 569         struct sockaddr_in6 *sin;
 570         struct sockaddr_dl *sdl;
 571         extern int h_errno;
 572         struct in6_nbrinfo *nbi;
 573         struct timeval now;
 574         int addrwidth;
 575         int llwidth;
 576         int ifwidth;
 577         char flgbuf[8];
 578         char *ifname;
 579
 580         /* Print header */
 581         if (!tflag && !cflag)
 582                 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 583                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 584                     W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 585
 586 again:;
 587         mib[0] = CTL_NET;
 588         mib[1] = PF_ROUTE;
 589         mib[2] = 0;
 590         mib[3] = AF_INET6;
 591         mib[4] = NET_RT_FLAGS;
 592 #ifdef RTF_LLINFO
 593         mib[5] = RTF_LLINFO;
 594 #else
 595         mib[5] = 0;
 596 #endif
 597         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 598                 err(1, "sysctl(PF_ROUTE estimate)");
 599         if (needed > 0) {
 600                 if ((buf = malloc(needed)) == NULL)
 601                         err(1, "malloc");
 602                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 603                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 604                 lim = buf + needed;
 605         } else
 606                 buf = lim = NULL;
 607
 608         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 609                 int isrouter = 0, prbs = 0;
 610
 611                 rtm = (struct rt_msghdr *)next;
 612                 sin = (struct sockaddr_in6 *)(rtm + 1);
 613                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 614
 615                 /*
 616                  * Some OSes can produce a route that has the LINK flag but
 617                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 618                  * and BSD/OS, where xx is not the interface identifier on
 619                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 620                  * so we skip them.
 621                  * XXX: such routes should have the GATEWAY flag, not the
 622                  * LINK flag.  However, there is rotten routing software
 623                  * that advertises all routes that have the GATEWAY flag.
 624                  * Thus, KAME kernel intentionally does not set the LINK flag.
 625                  * What is to be fixed is not ndp, but such routing software
 626                  * (and the kernel workaround)...
 627                  */
 628                 if (sdl->sdl_family != AF_LINK)
 629                         continue;
 630
 631                 if (!(rtm->rtm_flags & RTF_HOST))
 632                         continue;
 633
 634                 if (addr) {
 635                         if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
 636                             &sin->sin6_addr) == 0 ||
 637                             addr->sin6_scope_id != sin->sin6_scope_id)
 638                                 continue;
 639                         found_entry = 1;
 640                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 641                         continue;
 642                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 643                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 644                         /* XXX: should scope id be filled in the kernel? */
 645                         if (sin->sin6_scope_id == 0)
 646                                 sin->sin6_scope_id = sdl->sdl_index;
 647                 }
 648                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 649                     sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
 650                 if (cflag) {
 651 #ifdef RTF_WASCLONED
 652                         if (rtm->rtm_flags & RTF_WASCLONED)
 653                                 delete(host_buf);
 654 #elif defined(RTF_CLONED)
 655                         if (rtm->rtm_flags & RTF_CLONED)
 656                                 delete(host_buf);
 657 #else
 658                         delete(host_buf);
 659 #endif
 660                         continue;
 661                 }
 662                 gettimeofday(&now, 0);
 663                 if (tflag)
 664                         ts_print(&now);
 665
 666                 addrwidth = strlen(host_buf);
 667                 if (addrwidth < W_ADDR)
 668                         addrwidth = W_ADDR;
 669                 llwidth = strlen(ether_str(sdl));
 670                 if (W_ADDR + W_LL - addrwidth > llwidth)
 671                         llwidth = W_ADDR + W_LL - addrwidth;
 672                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 673                 if (!ifname)
 674                         ifname = "?";
 675                 ifwidth = strlen(ifname);
 676                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 677                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 678
 679                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 680                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 681
 682                 /* Print neighbor discovery specific information */
 683                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 684                 if (nbi) {
 685                         if (nbi->expire > now.tv_sec) {
 686                                 printf(" %-9.9s",
 687                                     sec2str(nbi->expire - now.tv_sec));
 688                         } else if (nbi->expire == 0)
 689                                 printf(" %-9.9s", "permanent");
 690                         else
 691                                 printf(" %-9.9s", "expired");
 692
 693                         switch (nbi->state) {
 694                         case ND6_LLINFO_NOSTATE:
 695                                  printf(" N");
 696                                  break;
 697 #ifdef ND6_LLINFO_WAITDELETE
 698                         case ND6_LLINFO_WAITDELETE:
 699                                  printf(" W");
 700                                  break;
 701 #endif
 702                         case ND6_LLINFO_INCOMPLETE:
 703                                  printf(" I");
 704                                  break;
 705                         case ND6_LLINFO_REACHABLE:
 706                                  printf(" R");
 707                                  break;
 708                         case ND6_LLINFO_STALE:
 709                                  printf(" S");
 710                                  break;
 711                         case ND6_LLINFO_DELAY:
 712                                  printf(" D");
 713                                  break;
 714                         case ND6_LLINFO_PROBE:
 715                                  printf(" P");
 716                                  break;
 717                         default:
 718                                  printf(" ?");
 719                                  break;
 720                         }
 721
 722                         isrouter = nbi->isrouter;
 723                         prbs = nbi->asked;
 724                 } else {
 725                         warnx("failed to get neighbor information");
 726                         printf("  ");
 727                 }
 728
 729                 /*
 730                  * other flags. R: router, P: proxy, W: ??
 731                  */
 732                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 733                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 734                             isrouter ? "R" : "",
 735                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 736                 } else {
 737                         sin = (struct sockaddr_in6 *)
 738                             (sdl->sdl_len + (char *)sdl);
 739 #if 0   /* W and P are mystery even for us */
 740                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 741                             isrouter ? "R" : "",
 742                             !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 743                             (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 744                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 745 #else
 746                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 747                             isrouter ? "R" : "",
 748                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 749 #endif
 750                 }
 751                 printf(" %s", flgbuf);
 752
 753                 if (prbs)
 754                         printf(" %d", prbs);
 755
 756                 printf("\n");
 757         }
 758         if (buf != NULL)
 759                 free(buf);
 760
 761         if (repeat) {
 762                 printf("\n");
 763                 fflush(stdout);
 764                 sleep(repeat);
 765                 goto again;
 766         }
 767 }
 768
 769 static struct in6_nbrinfo *
 770 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
 771 {
 772         static struct in6_nbrinfo nbi;
 773         int s;
 774
 775         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 776                 err(1, "socket");
 777
 778         bzero(&nbi, sizeof(nbi));
 779         if_indextoname(ifindex, nbi.ifname);
 780         nbi.addr = *addr;
 781         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 782                 if (warning)
 783                         warn("ioctl(SIOCGNBRINFO_IN6)");
 784                 close(s);
 785                 return(NULL);
 786         }
 787
 788         close(s);
 789         return(&nbi);
 790 }
 791
 792 static char *
 793 ether_str(struct sockaddr_dl *sdl)
 794 {
 795         static char hbuf[NI_MAXHOST];
 796
 797         if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 798                 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
 799                     sizeof(hbuf));
 800         } else if (sdl->sdl_alen) {
 801                 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
 802                 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
 803         } else
 804                 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
 805
 806         return(hbuf);
 807 }
 808
 809 static int
 810 ndp_ether_aton(char *a, u_char *n)
 811 {
 812         int i, o[6];
 813
 814         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 815             &o[3], &o[4], &o[5]);
 816         if (i != 6) {
 817                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 818                 return (1);
 819         }
 820         for (i = 0; i < 6; i++)
 821                 n[i] = o[i];
 822         return (0);
 823 }
 824
 825 static void
 826 usage()
 827 {
 828         printf("usage: ndp [-nt] hostname\n");
 829         printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
 830         printf("       ndp [-nt] -A wait\n");
 831         printf("       ndp [-nt] -d hostname\n");
 832         printf("       ndp [-nt] -f filename\n");
 833         printf("       ndp [-nt] -i interface [flags...]\n");
 834 #ifdef SIOCSDEFIFACE_IN6
 835         printf("       ndp [-nt] -I [interface|delete]\n");
 836 #endif
 837         printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
 838         exit(1);
 839 }
 840
 841 static int
 842 rtmsg(int cmd)
 843 {
 844         static int seq;
 845         int rlen;
 846         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 847         register char *cp = m_rtmsg.m_space;
 848         register int l;
 849
 850         errno = 0;
 851         if (cmd == RTM_DELETE)
 852                 goto doit;
 853         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 854         rtm->rtm_flags = flags;
 855         rtm->rtm_version = RTM_VERSION;
 856
 857         switch (cmd) {
 858         default:
 859                 fprintf(stderr, "ndp: internal wrong cmd\n");
 860                 exit(1);
 861         case RTM_ADD:
 862                 rtm->rtm_addrs |= RTA_GATEWAY;
 863                 if (expire_time) {
 864                         rtm->rtm_rmx.rmx_expire = expire_time;
 865                         rtm->rtm_inits = RTV_EXPIRE;
 866                 }
 867                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
 868 #if 0 /* we don't support ipv6addr/128 type proxying */
 869                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 870                         rtm->rtm_flags &= ~RTF_HOST;
 871                         rtm->rtm_addrs |= RTA_NETMASK;
 872                 }
 873 #endif
 874                 /* FALLTHROUGH */
 875         case RTM_GET:
 876                 rtm->rtm_addrs |= RTA_DST;
 877         }
 878
 879         NEXTADDR(RTA_DST, sin_m);
 880         NEXTADDR(RTA_GATEWAY, sdl_m);
 881 #if 0 /* we don't support ipv6addr/128 type proxying */
 882         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 883         NEXTADDR(RTA_NETMASK, so_mask);
 884 #endif
 885
 886         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 887 doit:
 888         l = rtm->rtm_msglen;
 889         rtm->rtm_seq = ++seq;
 890         rtm->rtm_type = cmd;
 891         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 892                 if (errno != ESRCH || cmd != RTM_DELETE) {
 893                         err(1, "writing to routing socket");
 894                         /* NOTREACHED */
 895                 }
 896         }
 897         do {
 898                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 899         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 900         if (l < 0)
 901                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 902                     strerror(errno));
 903         return (0);
 904 }
 905
 906 static void
 907 ifinfo(char *ifname, int argc, char **argv)
 908 {
 909         struct in6_ndireq nd;
 910         int i, s;
 911         u_int32_t newflags;
 912 #ifdef IPV6CTL_USETEMPADDR
 913         u_int8_t nullbuf[8];
 914 #endif
 915
 916         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 917                 err(1, "socket");
 918                 /* NOTREACHED */
 919         }
 920         bzero(&nd, sizeof(nd));
 921         strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
 922         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 923                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 924                 /* NOTREACHED */
 925         }
 926 #define ND nd.ndi
 927         newflags = ND.flags;
 928         for (i = 0; i < argc; i++) {
 929                 int clear = 0;
 930                 char *cp = argv[i];
 931
 932                 if (*cp == '-') {
 933                         clear = 1;
 934                         cp++;
 935                 }
 936
 937 #define SETFLAG(s, f) \
 938         do {\
 939                 if (strcmp(cp, (s)) == 0) {\
 940                         if (clear)\
 941                                 newflags &= ~(f);\
 942                         else\
 943                                 newflags |= (f);\
 944                 }\
 945         } while (0)
 946 /*
 947  * XXX: this macro is not 100% correct, in that it matches "nud" against
 948  *      "nudbogus".  But we just let it go since this is minor.
 949  */
 950 #define SETVALUE(f, v) \
 951         do { \
 952                 char *valptr; \
 953                 unsigned long newval; \
 954                 v = 0; /* unspecified */ \
 955                 if (strncmp(cp, f, strlen(f)) == 0) { \
 956                         valptr = strchr(cp, '='); \
 957                         if (valptr == NULL) \
 958                                 err(1, "syntax error in %s field", (f)); \
 959                         errno = 0; \
 960                         newval = strtoul(++valptr, NULL, 0); \
 961                         if (errno) \
 962                                 err(1, "syntax error in %s's value", (f)); \
 963                         v = newval; \
 964                 } \
 965         } while (0)
 966
 967                 SETFLAG("disabled", ND6_IFF_IFDISABLED);
 968                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 969 #ifdef ND6_IFF_ACCEPT_RTADV
 970                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 971 #endif
 972 #ifdef ND6_IFF_AUTO_LINKLOCAL
 973                 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
 974 #endif
 975 #ifdef ND6_IFF_NO_PREFER_IFACE
 976                 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
 977 #endif
 978                 SETVALUE("basereachable", ND.basereachable);
 979                 SETVALUE("retrans", ND.retrans);
 980                 SETVALUE("curhlim", ND.chlim);
 981
 982                 ND.flags = newflags;
 983                 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
 984                         err(1, "ioctl(SIOCSIFINFO_IN6)");
 985                         /* NOTREACHED */
 986                 }
 987 #undef SETFLAG
 988 #undef SETVALUE
 989         }
 990
 991         if (!ND.initialized) {
 992                 errx(1, "%s: not initialized yet", ifname);
 993                 /* NOTREACHED */
 994         }
 995
 996         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 997                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 998                 /* NOTREACHED */
 999         }
1000         printf("linkmtu=%d", ND.linkmtu);
1001         printf(", maxmtu=%d", ND.maxmtu);
1002         printf(", curhlim=%d", ND.chlim);
1003         printf(", basereachable=%ds%dms",
1004             ND.basereachable / 1000, ND.basereachable % 1000);
1005         printf(", reachable=%ds", ND.reachable);
1006         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1007 #ifdef IPV6CTL_USETEMPADDR
1008         memset(nullbuf, 0, sizeof(nullbuf));
1009         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1010                 int j;
1011                 u_int8_t *rbuf;
1012
1013                 for (i = 0; i < 3; i++) {
1014                         switch (i) {
1015                         case 0:
1016                                 printf("\nRandom seed(0): ");
1017                                 rbuf = ND.randomseed0;
1018                                 break;
1019                         case 1:
1020                                 printf("\nRandom seed(1): ");
1021                                 rbuf = ND.randomseed1;
1022                                 break;
1023                         case 2:
1024                                 printf("\nRandom ID:      ");
1025                                 rbuf = ND.randomid;
1026                                 break;
1027                         default:
1028                                 errx(1, "impossible case for tempaddr display");
1029                         }
1030                         for (j = 0; j < 8; j++)
1031                                 printf("%02x", rbuf[j]);
1032                 }
1033         }
1034 #endif
1035         if (ND.flags) {
1036                 printf("\nFlags: ");
1037 #ifdef ND6_IFF_IFDISABLED
1038                 if ((ND.flags & ND6_IFF_IFDISABLED))
1039                         printf("disabled ");
1040 #endif
1041                 if ((ND.flags & ND6_IFF_PERFORMNUD))
1042                         printf("nud ");
1043 #ifdef ND6_IFF_ACCEPT_RTADV
1044                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1045                         printf("accept_rtadv ");
1046 #endif
1047 #ifdef ND6_IFF_AUTO_LINKLOCAL
1048                 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1049                         printf("auto_linklocal ");
1050 #endif
1051 #ifdef ND6_IFF_NO_PREFER_IFACE
1052                 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1053                         printf("no_prefer_iface ");
1054 #endif
1055         }
1056         putc('\n', stdout);
1057 #undef ND
1058
1059         close(s);
1060 }
1061
1062 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1063 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1064 #endif
1065
1066 static void
1067 rtrlist()
1068 {
1069         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1070         char *buf;
1071         struct in6_defrouter *p, *ep;
1072         size_t l;
1073         struct timeval now;
1074
1075         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1076                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1077                 /*NOTREACHED*/
1078         }
1079         if (l == 0)
1080                 return;
1081         buf = malloc(l);
1082         if (!buf) {
1083                 err(1, "malloc");
1084                 /*NOTREACHED*/
1085         }
1086         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1087                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1088                 /*NOTREACHED*/
1089         }
1090
1091         ep = (struct in6_defrouter *)(buf + l);
1092         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1093                 int rtpref;
1094
1095                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1096                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1097                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1098                         strlcpy(host_buf, "?", sizeof(host_buf));
1099
1100                 printf("%s if=%s", host_buf,
1101                     if_indextoname(p->if_index, ifix_buf));
1102                 printf(", flags=%s%s",
1103                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1104                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1105                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1106                 printf(", pref=%s", rtpref_str[rtpref]);
1107
1108                 gettimeofday(&now, 0);
1109                 if (p->expire == 0)
1110                         printf(", expire=Never\n");
1111                 else
1112                         printf(", expire=%s\n",
1113                             sec2str(p->expire - now.tv_sec));
1114         }
1115         free(buf);
1116 }
1117
1118 static void
1119 plist()
1120 {
1121         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1122         char *buf;
1123         struct in6_prefix *p, *ep, *n;
1124         struct sockaddr_in6 *advrtr;
1125         size_t l;
1126         struct timeval now;
1127         const int niflags = NI_NUMERICHOST;
1128         int ninflags = nflag ? NI_NUMERICHOST : 0;
1129         char namebuf[NI_MAXHOST];
1130
1131         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1132                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1133                 /*NOTREACHED*/
1134         }
1135         buf = malloc(l);
1136         if (!buf) {
1137                 err(1, "malloc");
1138                 /*NOTREACHED*/
1139         }
1140         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1141                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1142                 /*NOTREACHED*/
1143         }
1144
1145         ep = (struct in6_prefix *)(buf + l);
1146         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1147                 advrtr = (struct sockaddr_in6 *)(p + 1);
1148                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1149
1150                 if (getnameinfo((struct sockaddr *)&p->prefix,
1151                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1152                     NULL, 0, niflags) != 0)
1153                         strlcpy(namebuf, "?", sizeof(namebuf));
1154                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1155                     if_indextoname(p->if_index, ifix_buf));
1156
1157                 gettimeofday(&now, 0);
1158                 /*
1159                  * meaning of fields, especially flags, is very different
1160                  * by origin.  notify the difference to the users.
1161                  */
1162                 printf("flags=%s%s%s%s%s",
1163                     p->raflags.onlink ? "L" : "",
1164                     p->raflags.autonomous ? "A" : "",
1165                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1166                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1167 #ifdef NDPRF_HOME
1168                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1169 #else
1170                     ""
1171 #endif
1172                     );
1173                 if (p->vltime == ND6_INFINITE_LIFETIME)
1174                         printf(" vltime=infinity");
1175                 else
1176                         printf(" vltime=%lu", (unsigned long)p->vltime);
1177                 if (p->pltime == ND6_INFINITE_LIFETIME)
1178                         printf(", pltime=infinity");
1179                 else
1180                         printf(", pltime=%lu", (unsigned long)p->pltime);
1181                 if (p->expire == 0)
1182                         printf(", expire=Never");
1183                 else if (p->expire >= now.tv_sec)
1184                         printf(", expire=%s",
1185                             sec2str(p->expire - now.tv_sec));
1186                 else
1187                         printf(", expired");
1188                 printf(", ref=%d", p->refcnt);
1189                 printf("\n");
1190                 /*
1191                  * "advertising router" list is meaningful only if the prefix
1192                  * information is from RA.
1193                  */
1194                 if (p->advrtrs) {
1195                         int j;
1196                         struct sockaddr_in6 *sin6;
1197
1198                         sin6 = advrtr;
1199                         printf("  advertised by\n");
1200                         for (j = 0; j < p->advrtrs; j++) {
1201                                 struct in6_nbrinfo *nbi;
1202
1203                                 if (getnameinfo((struct sockaddr *)sin6,
1204                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1205                                     NULL, 0, ninflags) != 0)
1206                                         strlcpy(namebuf, "?", sizeof(namebuf));
1207                                 printf("    %s", namebuf);
1208
1209                                 nbi = getnbrinfo(&sin6->sin6_addr,
1210                                     p->if_index, 0);
1211                                 if (nbi) {
1212                                         switch (nbi->state) {
1213                                         case ND6_LLINFO_REACHABLE:
1214                                         case ND6_LLINFO_STALE:
1215                                         case ND6_LLINFO_DELAY:
1216                                         case ND6_LLINFO_PROBE:
1217                                                 printf(" (reachable)\n");
1218                                                 break;
1219                                         default:
1220                                                 printf(" (unreachable)\n");
1221                                         }
1222                                 } else
1223                                         printf(" (no neighbor state)\n");
1224                                 sin6++;
1225                         }
1226                 } else
1227                         printf("  No advertising router\n");
1228         }
1229         free(buf);
1230 }
1231
1232 static void
1233 pfx_flush()
1234 {
1235         char dummyif[IFNAMSIZ+8];
1236         int s;
1237
1238         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1239                 err(1, "socket");
1240         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1241         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1242                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1243 }
1244
1245 static void
1246 rtr_flush()
1247 {
1248         char dummyif[IFNAMSIZ+8];
1249         int s;
1250
1251         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1252                 err(1, "socket");
1253         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1254         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1255                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1256
1257         close(s);
1258 }
1259
1260 static void
1261 harmonize_rtr()
1262 {
1263         char dummyif[IFNAMSIZ+8];
1264         int s;
1265
1266         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1267                 err(1, "socket");
1268         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1269         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1270                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1271
1272         close(s);
1273 }
1274
1275 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1276 static void
1277 setdefif(char *ifname)
1278 {
1279         struct in6_ndifreq ndifreq;
1280         unsigned int ifindex;
1281
1282         if (strcasecmp(ifname, "delete") == 0)
1283                 ifindex = 0;
1284         else {
1285                 if ((ifindex = if_nametoindex(ifname)) == 0)
1286                         err(1, "failed to resolve i/f index for %s", ifname);
1287         }
1288
1289         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1290                 err(1, "socket");
1291
1292         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1293         ndifreq.ifindex = ifindex;
1294
1295         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1296                 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1297
1298         close(s);
1299 }
1300
1301 static void
1302 getdefif()
1303 {
1304         struct in6_ndifreq ndifreq;
1305         char ifname[IFNAMSIZ+8];
1306
1307         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1308                 err(1, "socket");
1309
1310         memset(&ndifreq, 0, sizeof(ndifreq));
1311         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1312
1313         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1314                 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1315
1316         if (ndifreq.ifindex == 0)
1317                 printf("No default interface.\n");
1318         else {
1319                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1320                         err(1, "failed to resolve ifname for index %lu",
1321                             ndifreq.ifindex);
1322                 printf("ND default interface = %s\n", ifname);
1323         }
1324
1325         close(s);
1326 }
1327 #endif
1328
1329 static char *
1330 sec2str(time_t total)
1331 {
1332         static char result[256];
1333         int days, hours, mins, secs;
1334         int first = 1;
1335         char *p = result;
1336         char *ep = &result[sizeof(result)];
1337         int n;
1338
1339         days = total / 3600 / 24;
1340         hours = (total / 3600) % 24;
1341         mins = (total / 60) % 60;
1342         secs = total % 60;
1343
1344         if (days) {
1345                 first = 0;
1346                 n = snprintf(p, ep - p, "%dd", days);
1347                 if (n < 0 || n >= ep - p)
1348                         return "?";
1349                 p += n;
1350         }
1351         if (!first || hours) {
1352                 first = 0;
1353                 n = snprintf(p, ep - p, "%dh", hours);
1354                 if (n < 0 || n >= ep - p)
1355                         return "?";
1356                 p += n;
1357         }
1358         if (!first || mins) {
1359                 first = 0;
1360                 n = snprintf(p, ep - p, "%dm", mins);
1361                 if (n < 0 || n >= ep - p)
1362                         return "?";
1363                 p += n;
1364         }
1365         snprintf(p, ep - p, "%ds", secs);
1366
1367         return(result);
1368 }
1369
1370 /*
1371  * Print the timestamp
1372  * from tcpdump/util.c
1373  */
1374 static void
1375 ts_print(const struct timeval *tvp)
1376 {
1377         int s;
1378
1379         /* Default */
1380         s = (tvp->tv_sec + thiszone) % 86400;
1381         (void)printf("%02d:%02d:%02d.%06u ",
1382             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1383 }
1384
1385 #undef NEXTADDR