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