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  * SPDX-License-Identifier: BSD-3-Clause
   6  *
   7  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the project nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34 /*
  35  * Copyright (c) 1984, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * Sun Microsystems, Inc.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  */
  65
  66 /*
  67  * Based on:
  68  * "@(#) Copyright (c) 1984, 1993\n\
  69  *      The Regents of the University of California.  All rights reserved.\n";
  70  *
  71  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  72  */
  73
  74 /*
  75  * ndp - display, set, delete and flush neighbor cache
  76  */
  77
  78
  79 #include <sys/param.h>
  80 #include <sys/file.h>
  81 #include <sys/ioctl.h>
  82 #include <sys/socket.h>
  83 #include <sys/sysctl.h>
  84 #include <sys/time.h>
  85 #include <sys/queue.h>
  86
  87 #include <net/if.h>
  88 #include <net/if_dl.h>
  89 #include <net/if_types.h>
  90 #include <net/route.h>
  91
  92 #include <netinet/in.h>
  93 #include <netinet/if_ether.h>
  94
  95 #include <netinet/icmp6.h>
  96 #include <netinet6/in6_var.h>
  97 #include <netinet6/nd6.h>
  98
  99 #include <arpa/inet.h>
 100
 101 #include <ctype.h>
 102 #include <netdb.h>
 103 #include <errno.h>
 104 #include <nlist.h>
 105 #include <stdio.h>
 106 #include <string.h>
 107 #include <paths.h>
 108 #include <err.h>
 109 #include <stdlib.h>
 110 #include <fcntl.h>
 111 #include <unistd.h>
 112 #include "gmt2local.h"
 113
 114 #define NEXTADDR(w, s)                                  \
 115         if (rtm->rtm_addrs & (w)) {                     \
 116                 bcopy((char *)&s, cp, sizeof(s));       \
 117                 cp += SA_SIZE(&s);                      \
 118         }
 119
 120 static pid_t pid;
 121 static int nflag;
 122 static int tflag;
 123 static int32_t thiszone;        /* time difference with gmt */
 124 static int s = -1;
 125 static int repeat = 0;
 126
 127 static char host_buf[NI_MAXHOST];       /* getnameinfo() */
 128 static char ifix_buf[IFNAMSIZ];         /* if_indextoname() */
 129
 130 static int file(char *);
 131 static void getsocket(void);
 132 static int set(int, char **);
 133 static void get(char *);
 134 static int delete(char *);
 135 static void dump(struct sockaddr_in6 *, int);
 136 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
 137 static char *ether_str(struct sockaddr_dl *);
 138 static int ndp_ether_aton(char *, u_char *);
 139 static void usage(void);
 140 static int rtmsg(int);
 141 static void ifinfo(char *, int, char **);
 142 static void rtrlist(void);
 143 static void plist(void);
 144 static void pfx_flush(void);
 145 static void rtr_flush(void);
 146 static void harmonize_rtr(void);
 147 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 148 static void getdefif(void);
 149 static void setdefif(char *);
 150 #endif
 151 static char *sec2str(time_t);
 152 static void ts_print(const struct timeval *);
 153
 154 static const char *rtpref_str[] = {
 155         "medium",               /* 00 */
 156         "high",                 /* 01 */
 157         "rsv",                  /* 10 */
 158         "low"                   /* 11 */
 159 };
 160
 161 int
 162 main(int argc, char **argv)
 163 {
 164         int ch, mode = 0;
 165         char *arg = NULL;
 166
 167         pid = getpid();
 168         thiszone = gmt2local(0);
 169         while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
 170                 switch (ch) {
 171                 case 'a':
 172                 case 'c':
 173                 case 'p':
 174                 case 'r':
 175                 case 'H':
 176                 case 'P':
 177                 case 'R':
 178                 case 's':
 179                 case 'I':
 180                         if (mode) {
 181                                 usage();
 182                                 /*NOTREACHED*/
 183                         }
 184                         mode = ch;
 185                         arg = NULL;
 186                         break;
 187                 case 'f':
 188                         exit(file(optarg) ? 1 : 0);
 189                 case 'd':
 190                 case 'i':
 191                         if (mode) {
 192                                 usage();
 193                                 /*NOTREACHED*/
 194                         }
 195                         mode = ch;
 196                         arg = optarg;
 197                         break;
 198                 case 'n':
 199                         nflag = 1;
 200                         break;
 201                 case 't':
 202                         tflag = 1;
 203                         break;
 204                 case 'A':
 205                         if (mode) {
 206                                 usage();
 207                                 /*NOTREACHED*/
 208                         }
 209                         mode = 'a';
 210                         repeat = atoi(optarg);
 211                         if (repeat < 0) {
 212                                 usage();
 213                                 /*NOTREACHED*/
 214                         }
 215                         break;
 216                 default:
 217                         usage();
 218                 }
 219
 220         argc -= optind;
 221         argv += optind;
 222
 223         switch (mode) {
 224         case 'a':
 225         case 'c':
 226                 if (argc != 0) {
 227                         usage();
 228                         /*NOTREACHED*/
 229                 }
 230                 dump(0, mode == 'c');
 231                 break;
 232         case 'd':
 233                 if (argc != 0) {
 234                         usage();
 235                         /*NOTREACHED*/
 236                 }
 237                 delete(arg);
 238                 break;
 239         case 'I':
 240 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 241                 if (argc > 1) {
 242                         usage();
 243                         /*NOTREACHED*/
 244                 } else if (argc == 1) {
 245                         if (strcmp(*argv, "delete") == 0 ||
 246                             if_nametoindex(*argv))
 247                                 setdefif(*argv);
 248                         else
 249                                 errx(1, "invalid interface %s", *argv);
 250                 }
 251                 getdefif(); /* always call it to print the result */
 252                 break;
 253 #else
 254                 errx(1, "not supported yet");
 255                 /*NOTREACHED*/
 256 #endif
 257         case 'p':
 258                 if (argc != 0) {
 259                         usage();
 260                         /*NOTREACHED*/
 261                 }
 262                 plist();
 263                 break;
 264         case 'i':
 265                 ifinfo(arg, argc, argv);
 266                 break;
 267         case 'r':
 268                 if (argc != 0) {
 269                         usage();
 270                         /*NOTREACHED*/
 271                 }
 272                 rtrlist();
 273                 break;
 274         case 's':
 275                 if (argc < 2 || argc > 4)
 276                         usage();
 277                 exit(set(argc, argv) ? 1 : 0);
 278         case 'H':
 279                 if (argc != 0) {
 280                         usage();
 281                         /*NOTREACHED*/
 282                 }
 283                 harmonize_rtr();
 284                 break;
 285         case 'P':
 286                 if (argc != 0) {
 287                         usage();
 288                         /*NOTREACHED*/
 289                 }
 290                 pfx_flush();
 291                 break;
 292         case 'R':
 293                 if (argc != 0) {
 294                         usage();
 295                         /*NOTREACHED*/
 296                 }
 297                 rtr_flush();
 298                 break;
 299         case 0:
 300                 if (argc != 1) {
 301                         usage();
 302                         /*NOTREACHED*/
 303                 }
 304                 get(argv[0]);
 305                 break;
 306         }
 307         exit(0);
 308 }
 309
 310 /*
 311  * Process a file to set standard ndp entries
 312  */
 313 static int
 314 file(char *name)
 315 {
 316         FILE *fp;
 317         int i, retval;
 318         char line[100], arg[5][50], *args[5], *p;
 319
 320         if ((fp = fopen(name, "r")) == NULL)
 321                 err(1, "cannot open %s", name);
 322         args[0] = &arg[0][0];
 323         args[1] = &arg[1][0];
 324         args[2] = &arg[2][0];
 325         args[3] = &arg[3][0];
 326         args[4] = &arg[4][0];
 327         retval = 0;
 328         while (fgets(line, sizeof(line), fp) != NULL) {
 329                 if ((p = strchr(line, '#')) != NULL)
 330                         *p = '\0';
 331                 for (p = line; isblank(*p); p++);
 332                 if (*p == '\n' || *p == '\0')
 333                         continue;
 334                 i = sscanf(line, "%49s %49s %49s %49s %49s",
 335                     arg[0], arg[1], arg[2], arg[3], arg[4]);
 336                 if (i < 2) {
 337                         warnx("bad line: %s", line);
 338                         retval = 1;
 339                         continue;
 340                 }
 341                 if (set(i, args))
 342                         retval = 1;
 343         }
 344         fclose(fp);
 345         return (retval);
 346 }
 347
 348 static void
 349 getsocket()
 350 {
 351         if (s < 0) {
 352                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 353                 if (s < 0) {
 354                         err(1, "socket");
 355                         /* NOTREACHED */
 356                 }
 357         }
 358 }
 359
 360 static struct sockaddr_in6 so_mask = {
 361         .sin6_len = sizeof(so_mask),
 362         .sin6_family = AF_INET6
 363 };
 364 static struct sockaddr_in6 blank_sin = {
 365         .sin6_len = sizeof(blank_sin),
 366         .sin6_family = AF_INET6
 367 };
 368 static struct sockaddr_in6 sin_m;
 369 static struct sockaddr_dl blank_sdl = {
 370         .sdl_len = sizeof(blank_sdl),
 371         .sdl_family = AF_LINK
 372 };
 373 static struct sockaddr_dl sdl_m;
 374 static time_t expire_time;
 375 static int flags, found_entry;
 376 static struct {
 377         struct  rt_msghdr m_rtm;
 378         char    m_space[512];
 379 } m_rtmsg;
 380
 381 /*
 382  * Set an individual neighbor cache entry
 383  */
 384 static int
 385 set(int argc, char **argv)
 386 {
 387         register struct sockaddr_in6 *sin = &sin_m;
 388         register struct sockaddr_dl *sdl;
 389         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 390         struct addrinfo hints, *res;
 391         int gai_error;
 392         u_char *ea;
 393         char *host = argv[0], *eaddr = argv[1];
 394
 395         getsocket();
 396         argc -= 2;
 397         argv += 2;
 398         sdl_m = blank_sdl;
 399         sin_m = blank_sin;
 400
 401         bzero(&hints, sizeof(hints));
 402         hints.ai_family = AF_INET6;
 403         gai_error = getaddrinfo(host, NULL, &hints, &res);
 404         if (gai_error) {
 405                 fprintf(stderr, "ndp: %s: %s\n", host,
 406                         gai_strerror(gai_error));
 407                 return 1;
 408         }
 409         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 410         sin->sin6_scope_id =
 411             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 412         ea = (u_char *)LLADDR(&sdl_m);
 413         if (ndp_ether_aton(eaddr, ea) == 0)
 414                 sdl_m.sdl_alen = 6;
 415         flags = expire_time = 0;
 416         while (argc-- > 0) {
 417                 if (strncmp(argv[0], "temp", 4) == 0) {
 418                         struct timeval now;
 419
 420                         gettimeofday(&now, 0);
 421                         expire_time = now.tv_sec + 20 * 60;
 422                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 423                         flags |= RTF_ANNOUNCE;
 424                 argv++;
 425         }
 426         if (rtmsg(RTM_GET) < 0) {
 427                 errx(1, "RTM_GET(%s) failed", host);
 428                 /* NOTREACHED */
 429         }
 430         sin = (struct sockaddr_in6 *)(rtm + 1);
 431         sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
 432         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 433                 if (sdl->sdl_family == AF_LINK &&
 434                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 435                         switch (sdl->sdl_type) {
 436                         case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 437                         case IFT_ISO88024: case IFT_ISO88025:
 438                         case IFT_L2VLAN: case IFT_BRIDGE:
 439                                 goto overwrite;
 440                         }
 441                 }
 442                 fprintf(stderr, "set: cannot configure a new entry\n");
 443                 return 1;
 444         }
 445
 446 overwrite:
 447         if (sdl->sdl_family != AF_LINK) {
 448                 printf("cannot intuit interface index and type for %s\n", host);
 449                 return (1);
 450         }
 451         sdl_m.sdl_type = sdl->sdl_type;
 452         sdl_m.sdl_index = sdl->sdl_index;
 453         return (rtmsg(RTM_ADD));
 454 }
 455
 456 /*
 457  * Display an individual neighbor cache entry
 458  */
 459 static void
 460 get(char *host)
 461 {
 462         struct sockaddr_in6 *sin = &sin_m;
 463         struct addrinfo hints, *res;
 464         int gai_error;
 465
 466         sin_m = blank_sin;
 467         bzero(&hints, sizeof(hints));
 468         hints.ai_family = AF_INET6;
 469         gai_error = getaddrinfo(host, NULL, &hints, &res);
 470         if (gai_error) {
 471                 fprintf(stderr, "ndp: %s: %s\n", host,
 472                     gai_strerror(gai_error));
 473                 return;
 474         }
 475         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 476         sin->sin6_scope_id =
 477             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 478         dump(sin, 0);
 479         if (found_entry == 0) {
 480                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 481                     sizeof(host_buf), NULL ,0,
 482                     (nflag ? NI_NUMERICHOST : 0));
 483                 printf("%s (%s) -- no entry\n", host, host_buf);
 484                 exit(1);
 485         }
 486 }
 487
 488 /*
 489  * Delete a neighbor cache entry
 490  */
 491 static int
 492 delete(char *host)
 493 {
 494         struct sockaddr_in6 *sin = &sin_m;
 495         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 496         register char *cp = m_rtmsg.m_space;
 497         struct sockaddr_dl *sdl;
 498         struct addrinfo hints, *res;
 499         int gai_error;
 500
 501         getsocket();
 502         sin_m = blank_sin;
 503
 504         bzero(&hints, sizeof(hints));
 505         hints.ai_family = AF_INET6;
 506         gai_error = getaddrinfo(host, NULL, &hints, &res);
 507         if (gai_error) {
 508                 fprintf(stderr, "ndp: %s: %s\n", host,
 509                     gai_strerror(gai_error));
 510                 return 1;
 511         }
 512         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 513         sin->sin6_scope_id =
 514             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 515         if (rtmsg(RTM_GET) < 0) {
 516                 errx(1, "RTM_GET(%s) failed", host);
 517                 /* NOTREACHED */
 518         }
 519         sin = (struct sockaddr_in6 *)(rtm + 1);
 520         sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
 521         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 522                 if (sdl->sdl_family == AF_LINK &&
 523                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 524                         goto delete;
 525                 }
 526                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 527                 return 1;
 528         }
 529
 530 delete:
 531         if (sdl->sdl_family != AF_LINK) {
 532                 printf("cannot locate %s\n", host);
 533                 return (1);
 534         }
 535         /*
 536          * need to reinit the field because it has rt_key
 537          * but we want the actual address
 538          */
 539         NEXTADDR(RTA_DST, sin_m);
 540         rtm->rtm_flags |= RTF_LLDATA;
 541         if (rtmsg(RTM_DELETE) == 0) {
 542                 getnameinfo((struct sockaddr *)sin,
 543                     sin->sin6_len, host_buf,
 544                     sizeof(host_buf), NULL, 0,
 545                     (nflag ? NI_NUMERICHOST : 0));
 546                 printf("%s (%s) deleted\n", host, host_buf);
 547         }
 548
 549         return 0;
 550 }
 551
 552 #define W_ADDR  36
 553 #define W_LL    17
 554 #define W_IF    6
 555
 556 /*
 557  * Dump the entire neighbor cache
 558  */
 559 static void
 560 dump(struct sockaddr_in6 *addr, int cflag)
 561 {
 562         int mib[6];
 563         size_t needed;
 564         char *lim, *buf, *next;
 565         struct rt_msghdr *rtm;
 566         struct sockaddr_in6 *sin;
 567         struct sockaddr_dl *sdl;
 568         struct timeval now;
 569         time_t expire;
 570         int addrwidth;
 571         int llwidth;
 572         int ifwidth;
 573         char flgbuf[8];
 574         char *ifname;
 575
 576         /* Print header */
 577         if (!tflag && !cflag)
 578                 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 579                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 580                     W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 581
 582 again:;
 583         mib[0] = CTL_NET;
 584         mib[1] = PF_ROUTE;
 585         mib[2] = 0;
 586         mib[3] = AF_INET6;
 587         mib[4] = NET_RT_FLAGS;
 588 #ifdef RTF_LLINFO
 589         mib[5] = RTF_LLINFO;
 590 #else
 591         mib[5] = 0;
 592 #endif
 593         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 594                 err(1, "sysctl(PF_ROUTE estimate)");
 595         if (needed > 0) {
 596                 if ((buf = malloc(needed)) == NULL)
 597                         err(1, "malloc");
 598                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 599                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 600                 lim = buf + needed;
 601         } else
 602                 buf = lim = NULL;
 603
 604         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 605                 int isrouter = 0, prbs = 0;
 606
 607                 rtm = (struct rt_msghdr *)next;
 608                 sin = (struct sockaddr_in6 *)(rtm + 1);
 609                 sdl = (struct sockaddr_dl *)((char *)sin +
 610                     ALIGN(sin->sin6_len));
 611
 612                 /*
 613                  * Some OSes can produce a route that has the LINK flag but
 614                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 615                  * and BSD/OS, where xx is not the interface identifier on
 616                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 617                  * so we skip them.
 618                  * XXX: such routes should have the GATEWAY flag, not the
 619                  * LINK flag.  However, there is rotten routing software
 620                  * that advertises all routes that have the GATEWAY flag.
 621                  * Thus, KAME kernel intentionally does not set the LINK flag.
 622                  * What is to be fixed is not ndp, but such routing software
 623                  * (and the kernel workaround)...
 624                  */
 625                 if (sdl->sdl_family != AF_LINK)
 626                         continue;
 627
 628                 if (!(rtm->rtm_flags & RTF_HOST))
 629                         continue;
 630
 631                 if (addr) {
 632                         if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
 633                             &sin->sin6_addr) == 0 ||
 634                             addr->sin6_scope_id != sin->sin6_scope_id)
 635                                 continue;
 636                         found_entry = 1;
 637                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 638                         continue;
 639                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 640                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 641                         /* XXX: should scope id be filled in the kernel? */
 642                         if (sin->sin6_scope_id == 0)
 643                                 sin->sin6_scope_id = sdl->sdl_index;
 644                 }
 645                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 646                     sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
 647                 if (cflag) {
 648 #ifdef RTF_WASCLONED
 649                         if (rtm->rtm_flags & RTF_WASCLONED)
 650                                 delete(host_buf);
 651 #elif defined(RTF_CLONED)
 652                         if (rtm->rtm_flags & RTF_CLONED)
 653                                 delete(host_buf);
 654 #else
 655                         if (rtm->rtm_flags & RTF_PINNED)
 656                                 continue;
 657                         delete(host_buf);
 658 #endif
 659                         continue;
 660                 }
 661                 gettimeofday(&now, 0);
 662                 if (tflag)
 663                         ts_print(&now);
 664
 665                 addrwidth = strlen(host_buf);
 666                 if (addrwidth < W_ADDR)
 667                         addrwidth = W_ADDR;
 668                 llwidth = strlen(ether_str(sdl));
 669                 if (W_ADDR + W_LL - addrwidth > llwidth)
 670                         llwidth = W_ADDR + W_LL - addrwidth;
 671                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 672                 if (ifname == NULL) {
 673                         strlcpy(ifix_buf, "?", sizeof(ifix_buf));
 674                         ifname = ifix_buf;
 675                 }
 676                 ifwidth = strlen(ifname);
 677                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 678                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 679
 680                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 681                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 682
 683                 /* Print neighbor discovery specific information */
 684                 expire = rtm->rtm_rmx.rmx_expire;
 685                 if (expire > now.tv_sec)
 686                         printf(" %-9.9s", sec2str(expire - now.tv_sec));
 687                 else if (expire == 0)
 688                         printf(" %-9.9s", "permanent");
 689                 else
 690                         printf(" %-9.9s", "expired");
 691
 692                 switch (rtm->rtm_rmx.rmx_state) {
 693                 case ND6_LLINFO_NOSTATE:
 694                         printf(" N");
 695                         break;
 696 #ifdef ND6_LLINFO_WAITDELETE
 697                 case ND6_LLINFO_WAITDELETE:
 698                         printf(" W");
 699                         break;
 700 #endif
 701                 case ND6_LLINFO_INCOMPLETE:
 702                         printf(" I");
 703                         break;
 704                 case ND6_LLINFO_REACHABLE:
 705                         printf(" R");
 706                         break;
 707                 case ND6_LLINFO_STALE:
 708                         printf(" S");
 709                         break;
 710                 case ND6_LLINFO_DELAY:
 711                         printf(" D");
 712                         break;
 713                 case ND6_LLINFO_PROBE:
 714                         printf(" P");
 715                         break;
 716                 default:
 717                         printf(" ?");
 718                         break;
 719                 }
 720
 721                 isrouter = rtm->rtm_flags & RTF_GATEWAY;
 722                 prbs = rtm->rtm_rmx.rmx_pksent;
 723
 724                 /*
 725                  * other flags. R: router, P: proxy, W: ??
 726                  */
 727                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 728                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 729                             isrouter ? "R" : "",
 730                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 731                 } else {
 732 #if 0                   /* W and P are mystery even for us */
 733                         sin = (struct sockaddr_in6 *)
 734                             (sdl->sdl_len + (char *)sdl);
 735                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 736                             isrouter ? "R" : "",
 737                             !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 738                             (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 739                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 740 #else
 741                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 742                             isrouter ? "R" : "",
 743                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 744 #endif
 745                 }
 746                 printf(" %s", flgbuf);
 747
 748                 if (prbs)
 749                         printf(" %d", prbs);
 750
 751                 printf("\n");
 752         }
 753         if (buf != NULL)
 754                 free(buf);
 755
 756         if (repeat) {
 757                 printf("\n");
 758                 fflush(stdout);
 759                 sleep(repeat);
 760                 goto again;
 761         }
 762 }
 763
 764 static struct in6_nbrinfo *
 765 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
 766 {
 767         static struct in6_nbrinfo nbi;
 768         int sock;
 769
 770         if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 771                 err(1, "socket");
 772
 773         bzero(&nbi, sizeof(nbi));
 774         if_indextoname(ifindex, nbi.ifname);
 775         nbi.addr = *addr;
 776         if (ioctl(sock, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 777                 if (warning)
 778                         warn("ioctl(SIOCGNBRINFO_IN6)");
 779                 close(sock);
 780                 return(NULL);
 781         }
 782
 783         close(sock);
 784         return(&nbi);
 785 }
 786
 787 static char *
 788 ether_str(struct sockaddr_dl *sdl)
 789 {
 790         static char hbuf[NI_MAXHOST];
 791
 792         if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 793                 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
 794                     sizeof(hbuf));
 795         } else if (sdl->sdl_alen) {
 796                 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
 797                 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
 798         } else
 799                 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
 800
 801         return(hbuf);
 802 }
 803
 804 static int
 805 ndp_ether_aton(char *a, u_char *n)
 806 {
 807         int i, o[6];
 808
 809         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 810             &o[3], &o[4], &o[5]);
 811         if (i != 6) {
 812                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 813                 return (1);
 814         }
 815         for (i = 0; i < 6; i++)
 816                 n[i] = o[i];
 817         return (0);
 818 }
 819
 820 static void
 821 usage()
 822 {
 823         printf("usage: ndp [-nt] hostname\n");
 824         printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
 825         printf("       ndp [-nt] -A wait\n");
 826         printf("       ndp [-nt] -d hostname\n");
 827         printf("       ndp [-nt] -f filename\n");
 828         printf("       ndp [-nt] -i interface [flags...]\n");
 829 #ifdef SIOCSDEFIFACE_IN6
 830         printf("       ndp [-nt] -I [interface|delete]\n");
 831 #endif
 832         printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
 833         exit(1);
 834 }
 835
 836 static int
 837 rtmsg(int cmd)
 838 {
 839         static int seq;
 840         int rlen;
 841         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 842         register char *cp = m_rtmsg.m_space;
 843         register int l;
 844
 845         errno = 0;
 846         if (cmd == RTM_DELETE)
 847                 goto doit;
 848         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 849         rtm->rtm_flags = flags;
 850         rtm->rtm_version = RTM_VERSION;
 851
 852         switch (cmd) {
 853         default:
 854                 fprintf(stderr, "ndp: internal wrong cmd\n");
 855                 exit(1);
 856         case RTM_ADD:
 857                 rtm->rtm_addrs |= RTA_GATEWAY;
 858                 if (expire_time) {
 859                         rtm->rtm_rmx.rmx_expire = expire_time;
 860                         rtm->rtm_inits = RTV_EXPIRE;
 861                 }
 862                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
 863 #if 0           /* we don't support ipv6addr/128 type proxying */
 864                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 865                         rtm->rtm_flags &= ~RTF_HOST;
 866                         rtm->rtm_addrs |= RTA_NETMASK;
 867                 }
 868 #endif
 869                 /* FALLTHROUGH */
 870         case RTM_GET:
 871                 rtm->rtm_addrs |= RTA_DST;
 872         }
 873
 874         NEXTADDR(RTA_DST, sin_m);
 875         NEXTADDR(RTA_GATEWAY, sdl_m);
 876 #if 0   /* we don't support ipv6addr/128 type proxying */
 877         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 878         NEXTADDR(RTA_NETMASK, so_mask);
 879 #endif
 880
 881         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 882 doit:
 883         l = rtm->rtm_msglen;
 884         rtm->rtm_seq = ++seq;
 885         rtm->rtm_type = cmd;
 886         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 887                 if (errno != ESRCH || cmd != RTM_DELETE) {
 888                         err(1, "writing to routing socket");
 889                         /* NOTREACHED */
 890                 }
 891         }
 892         do {
 893                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 894         } while (l > 0 && (rtm->rtm_type != cmd || rtm->rtm_seq != seq ||
 895             rtm->rtm_pid != pid));
 896         if (l < 0)
 897                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 898                     strerror(errno));
 899         return (0);
 900 }
 901
 902 static void
 903 ifinfo(char *ifname, int argc, char **argv)
 904 {
 905         struct in6_ndireq nd;
 906         int i, sock;
 907         u_int32_t newflags;
 908 #ifdef IPV6CTL_USETEMPADDR
 909         u_int8_t nullbuf[8];
 910 #endif
 911
 912         if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 913                 err(1, "socket");
 914                 /* NOTREACHED */
 915         }
 916         bzero(&nd, sizeof(nd));
 917         strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
 918         if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 919                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 920                 /* NOTREACHED */
 921         }
 922 #define ND nd.ndi
 923         newflags = ND.flags;
 924         for (i = 0; i < argc; i++) {
 925                 int clear = 0;
 926                 char *cp = argv[i];
 927
 928                 if (*cp == '-') {
 929                         clear = 1;
 930                         cp++;
 931                 }
 932
 933 #define SETFLAG(s, f) do {                      \
 934         if (strcmp(cp, (s)) == 0) {             \
 935                 if (clear)                      \
 936                         newflags &= ~(f);       \
 937                 else                            \
 938                         newflags |= (f);        \
 939         }                                       \
 940 } while (0)
 941 /*
 942  * XXX: this macro is not 100% correct, in that it matches "nud" against
 943  *      "nudbogus".  But we just let it go since this is minor.
 944  */
 945 #define SETVALUE(f, v) do {                                             \
 946         char *valptr;                                                   \
 947         unsigned long newval;                                           \
 948         v = 0; /* unspecified */                                        \
 949         if (strncmp(cp, f, strlen(f)) == 0) {                           \
 950                 valptr = strchr(cp, '=');                               \
 951                 if (valptr == NULL)                                     \
 952                         err(1, "syntax error in %s field", (f));        \
 953                 errno = 0;                                              \
 954                 newval = strtoul(++valptr, NULL, 0);                    \
 955                 if (errno)                                              \
 956                         err(1, "syntax error in %s's value", (f));      \
 957                 v = newval;                                             \
 958         }                                                               \
 959 } while (0)
 960
 961                 SETFLAG("disabled", ND6_IFF_IFDISABLED);
 962                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 963 #ifdef ND6_IFF_ACCEPT_RTADV
 964                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 965 #endif
 966 #ifdef ND6_IFF_AUTO_LINKLOCAL
 967                 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
 968 #endif
 969 #ifdef ND6_IFF_NO_PREFER_IFACE
 970                 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
 971 #endif
 972                 SETVALUE("basereachable", ND.basereachable);
 973                 SETVALUE("retrans", ND.retrans);
 974                 SETVALUE("curhlim", ND.chlim);
 975
 976                 ND.flags = newflags;
 977                 if (ioctl(sock, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
 978                         err(1, "ioctl(SIOCSIFINFO_IN6)");
 979                         /* NOTREACHED */
 980                 }
 981 #undef SETFLAG
 982 #undef SETVALUE
 983         }
 984
 985         if (!ND.initialized) {
 986                 errx(1, "%s: not initialized yet", ifname);
 987                 /* NOTREACHED */
 988         }
 989
 990         if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 991                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 992                 /* NOTREACHED */
 993         }
 994         printf("linkmtu=%d", ND.linkmtu);
 995         printf(", maxmtu=%d", ND.maxmtu);
 996         printf(", curhlim=%d", ND.chlim);
 997         printf(", basereachable=%ds%dms",
 998             ND.basereachable / 1000, ND.basereachable % 1000);
 999         printf(", reachable=%ds", ND.reachable);
1000         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1001 #ifdef IPV6CTL_USETEMPADDR
1002         memset(nullbuf, 0, sizeof(nullbuf));
1003         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1004                 int j;
1005                 u_int8_t *rbuf;
1006
1007                 for (i = 0; i < 3; i++) {
1008                         switch (i) {
1009                         case 0:
1010                                 printf("\nRandom seed(0): ");
1011                                 rbuf = ND.randomseed0;
1012                                 break;
1013                         case 1:
1014                                 printf("\nRandom seed(1): ");
1015                                 rbuf = ND.randomseed1;
1016                                 break;
1017                         case 2:
1018                                 printf("\nRandom ID:      ");
1019                                 rbuf = ND.randomid;
1020                                 break;
1021                         default:
1022                                 errx(1, "impossible case for tempaddr display");
1023                         }
1024                         for (j = 0; j < 8; j++)
1025                                 printf("%02x", rbuf[j]);
1026                 }
1027         }
1028 #endif /* IPV6CTL_USETEMPADDR */
1029         if (ND.flags) {
1030                 printf("\nFlags: ");
1031 #ifdef ND6_IFF_IFDISABLED
1032                 if ((ND.flags & ND6_IFF_IFDISABLED))
1033                         printf("disabled ");
1034 #endif
1035                 if ((ND.flags & ND6_IFF_PERFORMNUD))
1036                         printf("nud ");
1037 #ifdef ND6_IFF_ACCEPT_RTADV
1038                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1039                         printf("accept_rtadv ");
1040 #endif
1041 #ifdef ND6_IFF_AUTO_LINKLOCAL
1042                 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1043                         printf("auto_linklocal ");
1044 #endif
1045 #ifdef ND6_IFF_NO_PREFER_IFACE
1046                 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1047                         printf("no_prefer_iface ");
1048 #endif
1049         }
1050         putc('\n', stdout);
1051 #undef ND
1052
1053         close(sock);
1054 }
1055
1056 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1057 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1058 #endif
1059
1060 static void
1061 rtrlist()
1062 {
1063         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1064         char *buf;
1065         struct in6_defrouter *p, *ep;
1066         size_t l;
1067         struct timeval now;
1068
1069         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1070                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1071                 /*NOTREACHED*/
1072         }
1073         if (l == 0)
1074                 return;
1075         buf = malloc(l);
1076         if (!buf) {
1077                 err(1, "malloc");
1078                 /*NOTREACHED*/
1079         }
1080         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1081                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1082                 /*NOTREACHED*/
1083         }
1084
1085         ep = (struct in6_defrouter *)(buf + l);
1086         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1087                 int rtpref;
1088
1089                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1090                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1091                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1092                         strlcpy(host_buf, "?", sizeof(host_buf));
1093
1094                 printf("%s if=%s", host_buf,
1095                     if_indextoname(p->if_index, ifix_buf));
1096                 printf(", flags=%s%s",
1097                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1098                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1099 #ifdef DRAFT_IETF_6MAN_IPV6ONLY_FLAG
1100                 printf("%s", p->flags & ND_RA_FLAG_IPV6_ONLY ? "S" : "");
1101 #endif
1102                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1103                 printf(", pref=%s", rtpref_str[rtpref]);
1104
1105                 gettimeofday(&now, 0);
1106                 if (p->expire == 0)
1107                         printf(", expire=Never\n");
1108                 else
1109                         printf(", expire=%s\n",
1110                             sec2str(p->expire - now.tv_sec));
1111         }
1112         free(buf);
1113 }
1114
1115 static void
1116 plist()
1117 {
1118         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1119         char *buf;
1120         struct in6_prefix *p, *ep, *n;
1121         struct sockaddr_in6 *advrtr;
1122         size_t l;
1123         struct timeval now;
1124         const int niflags = NI_NUMERICHOST;
1125         int ninflags = nflag ? NI_NUMERICHOST : 0;
1126         char namebuf[NI_MAXHOST];
1127
1128         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1129                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1130                 /*NOTREACHED*/
1131         }
1132         buf = malloc(l);
1133         if (!buf) {
1134                 err(1, "malloc");
1135                 /*NOTREACHED*/
1136         }
1137         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1138                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1139                 /*NOTREACHED*/
1140         }
1141
1142         ep = (struct in6_prefix *)(buf + l);
1143         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1144                 advrtr = (struct sockaddr_in6 *)(p + 1);
1145                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1146
1147                 if (getnameinfo((struct sockaddr *)&p->prefix,
1148                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1149                     NULL, 0, niflags) != 0)
1150                         strlcpy(namebuf, "?", sizeof(namebuf));
1151                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1152                     if_indextoname(p->if_index, ifix_buf));
1153
1154                 gettimeofday(&now, 0);
1155                 /*
1156                  * meaning of fields, especially flags, is very different
1157                  * by origin.  notify the difference to the users.
1158                  */
1159                 printf("flags=%s%s%s%s%s",
1160                     p->raflags.onlink ? "L" : "",
1161                     p->raflags.autonomous ? "A" : "",
1162                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1163                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1164 #ifdef NDPRF_HOME
1165                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1166 #else
1167                     ""
1168 #endif
1169                     );
1170                 if (p->vltime == ND6_INFINITE_LIFETIME)
1171                         printf(" vltime=infinity");
1172                 else
1173                         printf(" vltime=%lu", (unsigned long)p->vltime);
1174                 if (p->pltime == ND6_INFINITE_LIFETIME)
1175                         printf(", pltime=infinity");
1176                 else
1177                         printf(", pltime=%lu", (unsigned long)p->pltime);
1178                 if (p->expire == 0)
1179                         printf(", expire=Never");
1180                 else if (p->expire >= now.tv_sec)
1181                         printf(", expire=%s",
1182                             sec2str(p->expire - now.tv_sec));
1183                 else
1184                         printf(", expired");
1185                 printf(", ref=%d", p->refcnt);
1186                 printf("\n");
1187                 /*
1188                  * "advertising router" list is meaningful only if the prefix
1189                  * information is from RA.
1190                  */
1191                 if (p->advrtrs) {
1192                         int j;
1193                         struct sockaddr_in6 *sin6;
1194
1195                         sin6 = advrtr;
1196                         printf("  advertised by\n");
1197                         for (j = 0; j < p->advrtrs; j++) {
1198                                 struct in6_nbrinfo *nbi;
1199
1200                                 if (getnameinfo((struct sockaddr *)sin6,
1201                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1202                                     NULL, 0, ninflags) != 0)
1203                                         strlcpy(namebuf, "?", sizeof(namebuf));
1204                                 printf("    %s", namebuf);
1205
1206                                 nbi = getnbrinfo(&sin6->sin6_addr,
1207                                     p->if_index, 0);
1208                                 if (nbi) {
1209                                         switch (nbi->state) {
1210                                         case ND6_LLINFO_REACHABLE:
1211                                         case ND6_LLINFO_STALE:
1212                                         case ND6_LLINFO_DELAY:
1213                                         case ND6_LLINFO_PROBE:
1214                                                 printf(" (reachable)\n");
1215                                                 break;
1216                                         default:
1217                                                 printf(" (unreachable)\n");
1218                                         }
1219                                 } else
1220                                         printf(" (no neighbor state)\n");
1221                                 sin6++;
1222                         }
1223                 } else
1224                         printf("  No advertising router\n");
1225         }
1226         free(buf);
1227 }
1228
1229 static void
1230 pfx_flush()
1231 {
1232         char dummyif[IFNAMSIZ+8];
1233         int sock;
1234
1235         if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1236                 err(1, "socket");
1237         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1238         if (ioctl(sock, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1239                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1240
1241         close(sock);
1242 }
1243
1244 static void
1245 rtr_flush()
1246 {
1247         char dummyif[IFNAMSIZ+8];
1248         int sock;
1249
1250         if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1251                 err(1, "socket");
1252         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1253         if (ioctl(sock, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1254                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1255
1256         close(sock);
1257 }
1258
1259 static void
1260 harmonize_rtr()
1261 {
1262         char dummyif[IFNAMSIZ+8];
1263         int sock;
1264
1265         if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1266                 err(1, "socket");
1267         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1268         if (ioctl(sock, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1269                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1270
1271         close(sock);
1272 }
1273
1274 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1275 static void
1276 setdefif(char *ifname)
1277 {
1278         struct in6_ndifreq ndifreq;
1279         unsigned int ifindex;
1280         int sock;
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 ((sock = 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(sock, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1296                 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1297
1298         close(sock);
1299 }
1300
1301 static void
1302 getdefif()
1303 {
1304         struct in6_ndifreq ndifreq;
1305         char ifname[IFNAMSIZ+8];
1306         int sock;
1307
1308         if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1309                 err(1, "socket");
1310
1311         memset(&ndifreq, 0, sizeof(ndifreq));
1312         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1313
1314         if (ioctl(sock, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1315                 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1316
1317         if (ndifreq.ifindex == 0)
1318                 printf("No default interface.\n");
1319         else {
1320                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1321                         err(1, "failed to resolve ifname for index %lu",
1322                             ndifreq.ifindex);
1323                 printf("ND default interface = %s\n", ifname);
1324         }
1325
1326         close(sock);
1327 }
1328 #endif /* SIOCSDEFIFACE_IN6 */
1329
1330 static char *
1331 sec2str(time_t total)
1332 {
1333         static char result[256];
1334         int days, hours, mins, secs;
1335         int first = 1;
1336         char *p = result;
1337         char *ep = &result[sizeof(result)];
1338         int n;
1339
1340         days = total / 3600 / 24;
1341         hours = (total / 3600) % 24;
1342         mins = (total / 60) % 60;
1343         secs = total % 60;
1344
1345         if (days) {
1346                 first = 0;
1347                 n = snprintf(p, ep - p, "%dd", days);
1348                 if (n < 0 || n >= ep - p)
1349                         return "?";
1350                 p += n;
1351         }
1352         if (!first || hours) {
1353                 first = 0;
1354                 n = snprintf(p, ep - p, "%dh", hours);
1355                 if (n < 0 || n >= ep - p)
1356                         return "?";
1357                 p += n;
1358         }
1359         if (!first || mins) {
1360                 first = 0;
1361                 n = snprintf(p, ep - p, "%dm", mins);
1362                 if (n < 0 || n >= ep - p)
1363                         return "?";
1364                 p += n;
1365         }
1366         snprintf(p, ep - p, "%ds", secs);
1367
1368         return(result);
1369 }
1370
1371 /*
1372  * Print the timestamp
1373  * from tcpdump/util.c
1374  */
1375 static void
1376 ts_print(const struct timeval *tvp)
1377 {
1378         int sec;
1379
1380         /* Default */
1381         sec = (tvp->tv_sec + thiszone) % 86400;
1382         (void)printf("%02d:%02d:%02d.%06u ",
1383             sec / 3600, (sec % 3600) / 60, sec % 60, (u_int32_t)tvp->tv_usec);
1384 }
1385
1386 #undef NEXTADDR