usr.sbin/ndp/ndp.c

   1 /*      $FreeBSD$       */
   2 /*      $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $   */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 /*
  33  * Copyright (c) 1984, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * Sun Microsystems, Inc.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  */
  63
  64 /*
  65  * Based on:
  66  * "@(#) Copyright (c) 1984, 1993\n\
  67  *      The Regents of the University of California.  All rights reserved.\n";
  68  *
  69  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  70  */
  71
  72 /*
  73  * ndp - display, set, delete and flush neighbor cache
  74  */
  75
  76
  77 #include <sys/param.h>
  78 #include <sys/file.h>
  79 #include <sys/ioctl.h>
  80 #include <sys/socket.h>
  81 #include <sys/sysctl.h>
  82 #include <sys/time.h>
  83 #include <sys/queue.h>
  84
  85 #include <net/if.h>
  86 #include <net/if_var.h>
  87 #include <net/if_dl.h>
  88 #include <net/if_types.h>
  89 #include <net/route.h>
  90
  91 #include <netinet/in.h>
  92 #include <netinet/if_ether.h>
  93
  94 #include <netinet/icmp6.h>
  95 #include <netinet6/in6_var.h>
  96 #include <netinet6/nd6.h>
  97
  98 #include <arpa/inet.h>
  99
 100 #include <ctype.h>
 101 #include <netdb.h>
 102 #include <errno.h>
 103 #include <nlist.h>
 104 #include <stdio.h>
 105 #include <string.h>
 106 #include <paths.h>
 107 #include <err.h>
 108 #include <stdlib.h>
 109 #include <fcntl.h>
 110 #include <unistd.h>
 111 #include "gmt2local.h"
 112
 113 /* packing rule for routing socket */
 114 #define ROUNDUP(a) \
 115         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 116 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 117
 118 #define NEXTADDR(w, s) \
 119         if (rtm->rtm_addrs & (w)) { \
 120                 bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);}
 121
 122
 123 static pid_t pid;
 124 static int nflag;
 125 static int tflag;
 126 static int32_t thiszone;        /* time difference with gmt */
 127 static int s = -1;
 128 static int repeat = 0;
 129
 130 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 131 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 132 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 133
 134 int main(int, char **);
 135 static int file(char *);
 136 void getsocket(void);
 137 int set(int, char **);
 138 void get(char *);
 139 int delete(char *);
 140 void dump(struct in6_addr *, int);
 141 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
 142 static char *ether_str(struct sockaddr_dl *);
 143 int ndp_ether_aton(char *, u_char *);
 144 void usage(void);
 145 int rtmsg(int);
 146 void ifinfo(char *, int, char **);
 147 void rtrlist(void);
 148 void plist(void);
 149 void pfx_flush(void);
 150 void rtr_flush(void);
 151 void harmonize_rtr(void);
 152 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 153 static void getdefif(void);
 154 static void setdefif(char *);
 155 #endif
 156 static char *sec2str(time_t);
 157 static void ts_print(const struct timeval *);
 158
 159 #ifdef ICMPV6CTL_ND6_DRLIST
 160 static char *rtpref_str[] = {
 161         "medium",               /* 00 */
 162         "high",                 /* 01 */
 163         "rsv",                  /* 10 */
 164         "low"                   /* 11 */
 165 };
 166 #endif
 167
 168 int mode = 0;
 169 char *arg = NULL;
 170
 171 int
 172 main(argc, argv)
 173         int argc;
 174         char **argv;
 175 {
 176         int ch;
 177
 178         pid = getpid();
 179         thiszone = gmt2local(0);
 180         while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
 181                 switch (ch) {
 182                 case 'a':
 183                 case 'c':
 184                 case 'p':
 185                 case 'r':
 186                 case 'H':
 187                 case 'P':
 188                 case 'R':
 189                 case 's':
 190                 case 'I':
 191                         if (mode) {
 192                                 usage();
 193                                 /*NOTREACHED*/
 194                         }
 195                         mode = ch;
 196                         arg = NULL;
 197                         break;
 198                 case 'f':
 199                         exit(file(optarg) ? 1 : 0);
 200                 case 'd':
 201                 case 'i':
 202                         if (mode) {
 203                                 usage();
 204                                 /*NOTREACHED*/
 205                         }
 206                         mode = ch;
 207                         arg = optarg;
 208                         break;
 209                 case 'n':
 210                         nflag = 1;
 211                         break;
 212                 case 't':
 213                         tflag = 1;
 214                         break;
 215                 case 'A':
 216                         if (mode) {
 217                                 usage();
 218                                 /*NOTREACHED*/
 219                         }
 220                         mode = 'a';
 221                         repeat = atoi(optarg);
 222                         if (repeat < 0) {
 223                                 usage();
 224                                 /*NOTREACHED*/
 225                         }
 226                         break;
 227                 default:
 228                         usage();
 229                 }
 230
 231         argc -= optind;
 232         argv += optind;
 233
 234         switch (mode) {
 235         case 'a':
 236         case 'c':
 237                 if (argc != 0) {
 238                         usage();
 239                         /*NOTREACHED*/
 240                 }
 241                 dump(0, mode == 'c');
 242                 break;
 243         case 'd':
 244                 if (argc != 0) {
 245                         usage();
 246                         /*NOTREACHED*/
 247                 }
 248                 delete(arg);
 249                 break;
 250         case 'I':
 251 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 252                 if (argc > 1) {
 253                         usage();
 254                         /*NOTREACHED*/
 255                 } else if (argc == 1) {
 256                         if (strcmp(*argv, "delete") == 0 ||
 257                             if_nametoindex(*argv))
 258                                 setdefif(*argv);
 259                         else
 260                                 errx(1, "invalid interface %s", *argv);
 261                 }
 262                 getdefif(); /* always call it to print the result */
 263                 break;
 264 #else
 265                 errx(1, "not supported yet");
 266                 /*NOTREACHED*/
 267 #endif
 268         case 'p':
 269                 if (argc != 0) {
 270                         usage();
 271                         /*NOTREACHED*/
 272                 }
 273                 plist();
 274                 break;
 275         case 'i':
 276                 ifinfo(arg, argc, argv);
 277                 break;
 278         case 'r':
 279                 if (argc != 0) {
 280                         usage();
 281                         /*NOTREACHED*/
 282                 }
 283                 rtrlist();
 284                 break;
 285         case 's':
 286                 if (argc < 2 || argc > 4)
 287                         usage();
 288                 exit(set(argc, argv) ? 1 : 0);
 289         case 'H':
 290                 if (argc != 0) {
 291                         usage();
 292                         /*NOTREACHED*/
 293                 }
 294                 harmonize_rtr();
 295                 break;
 296         case 'P':
 297                 if (argc != 0) {
 298                         usage();
 299                         /*NOTREACHED*/
 300                 }
 301                 pfx_flush();
 302                 break;
 303         case 'R':
 304                 if (argc != 0) {
 305                         usage();
 306                         /*NOTREACHED*/
 307                 }
 308                 rtr_flush();
 309                 break;
 310         case 0:
 311                 if (argc != 1) {
 312                         usage();
 313                         /*NOTREACHED*/
 314                 }
 315                 get(argv[0]);
 316                 break;
 317         }
 318         exit(0);
 319 }
 320
 321 /*
 322  * Process a file to set standard ndp entries
 323  */
 324 static int
 325 file(name)
 326         char *name;
 327 {
 328         FILE *fp;
 329         int i, retval;
 330         char line[100], arg[5][50], *args[5], *p;
 331
 332         if ((fp = fopen(name, "r")) == NULL)
 333                 err(1, "cannot open %s", name);
 334         args[0] = &arg[0][0];
 335         args[1] = &arg[1][0];
 336         args[2] = &arg[2][0];
 337         args[3] = &arg[3][0];
 338         args[4] = &arg[4][0];
 339         retval = 0;
 340         while (fgets(line, sizeof(line), fp) != NULL) {
 341                 if ((p = strchr(line, '#')) != NULL)
 342                         *p = '\0';
 343                 for (p = line; isblank(*p); p++);
 344                 if (*p == '\n' || *p == '\0')
 345                         continue;
 346                 i = sscanf(line, "%49s %49s %49s %49s %49s",
 347                     arg[0], arg[1], arg[2], arg[3], arg[4]);
 348                 if (i < 2) {
 349                         warnx("bad line: %s", line);
 350                         retval = 1;
 351                         continue;
 352                 }
 353                 if (set(i, args))
 354                         retval = 1;
 355         }
 356         fclose(fp);
 357         return (retval);
 358 }
 359
 360 void
 361 getsocket()
 362 {
 363         if (s < 0) {
 364                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 365                 if (s < 0) {
 366                         err(1, "socket");
 367                         /* NOTREACHED */
 368                 }
 369         }
 370 }
 371
 372 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 373 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 374 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 375 time_t  expire_time;
 376 int     flags, found_entry;
 377 struct  {
 378         struct  rt_msghdr m_rtm;
 379         char    m_space[512];
 380 }       m_rtmsg;
 381
 382 /*
 383  * Set an individual neighbor cache entry
 384  */
 385 int
 386 set(argc, argv)
 387         int argc;
 388         char **argv;
 389 {
 390         register struct sockaddr_in6 *sin = &sin_m;
 391         register struct sockaddr_dl *sdl;
 392         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 393         struct addrinfo hints, *res;
 394         int gai_error;
 395         u_char *ea;
 396         char *host = argv[0], *eaddr = argv[1];
 397
 398         getsocket();
 399         argc -= 2;
 400         argv += 2;
 401         sdl_m = blank_sdl;
 402         sin_m = blank_sin;
 403
 404         bzero(&hints, sizeof(hints));
 405         hints.ai_family = AF_INET6;
 406         gai_error = getaddrinfo(host, NULL, &hints, &res);
 407         if (gai_error) {
 408                 fprintf(stderr, "ndp: %s: %s\n", host,
 409                         gai_strerror(gai_error));
 410                 return 1;
 411         }
 412         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 413         sin->sin6_scope_id =
 414             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 415         ea = (u_char *)LLADDR(&sdl_m);
 416         if (ndp_ether_aton(eaddr, ea) == 0)
 417                 sdl_m.sdl_alen = 6;
 418         flags = expire_time = 0;
 419         while (argc-- > 0) {
 420                 if (strncmp(argv[0], "temp", 4) == 0) {
 421                         struct timeval now;
 422
 423                         gettimeofday(&now, 0);
 424                         expire_time = now.tv_sec + 20 * 60;
 425                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 426                         flags |= RTF_ANNOUNCE;
 427                 argv++;
 428         }
 429         if (rtmsg(RTM_GET) < 0) {
 430                 errx(1, "RTM_GET(%s) failed", host);
 431                 /* NOTREACHED */
 432         }
 433         sin = (struct sockaddr_in6 *)(rtm + 1);
 434         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 435         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 436                 if (sdl->sdl_family == AF_LINK &&
 437                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 438                         switch (sdl->sdl_type) {
 439                         case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 440                         case IFT_ISO88024: case IFT_ISO88025:
 441                         case IFT_L2VLAN: case IFT_BRIDGE:
 442                                 goto overwrite;
 443                         }
 444                 }
 445                 fprintf(stderr, "set: cannot configure a new entry\n");
 446                 return 1;
 447         }
 448
 449 overwrite:
 450         if (sdl->sdl_family != AF_LINK) {
 451                 printf("cannot intuit interface index and type for %s\n", host);
 452                 return (1);
 453         }
 454         sdl_m.sdl_type = sdl->sdl_type;
 455         sdl_m.sdl_index = sdl->sdl_index;
 456         return (rtmsg(RTM_ADD));
 457 }
 458
 459 /*
 460  * Display an individual neighbor cache entry
 461  */
 462 void
 463 get(host)
 464         char *host;
 465 {
 466         struct sockaddr_in6 *sin = &sin_m;
 467         struct addrinfo hints, *res;
 468         int gai_error;
 469
 470         sin_m = blank_sin;
 471         bzero(&hints, sizeof(hints));
 472         hints.ai_family = AF_INET6;
 473         gai_error = getaddrinfo(host, NULL, &hints, &res);
 474         if (gai_error) {
 475                 fprintf(stderr, "ndp: %s: %s\n", host,
 476                     gai_strerror(gai_error));
 477                 return;
 478         }
 479         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 480         dump(&sin->sin6_addr, 0);
 481         if (found_entry == 0) {
 482                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 483                     sizeof(host_buf), NULL ,0,
 484                     (nflag ? NI_NUMERICHOST : 0));
 485                 printf("%s (%s) -- no entry\n", host, host_buf);
 486                 exit(1);
 487         }
 488 }
 489
 490 /*
 491  * Delete a neighbor cache entry
 492  */
 493 int
 494 delete(host)
 495         char *host;
 496 {
 497         struct sockaddr_in6 *sin = &sin_m;
 498         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 499         register char *cp = m_rtmsg.m_space;
 500         struct sockaddr_dl *sdl;
 501         struct addrinfo hints, *res;
 502         int gai_error;
 503
 504         getsocket();
 505         sin_m = blank_sin;
 506
 507         bzero(&hints, sizeof(hints));
 508         hints.ai_family = AF_INET6;
 509         gai_error = getaddrinfo(host, NULL, &hints, &res);
 510         if (gai_error) {
 511                 fprintf(stderr, "ndp: %s: %s\n", host,
 512                     gai_strerror(gai_error));
 513                 return 1;
 514         }
 515         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 516         sin->sin6_scope_id =
 517             ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 518         if (rtmsg(RTM_GET) < 0) {
 519                 errx(1, "RTM_GET(%s) failed", host);
 520                 /* NOTREACHED */
 521         }
 522         sin = (struct sockaddr_in6 *)(rtm + 1);
 523         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 524         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 525                 if (sdl->sdl_family == AF_LINK &&
 526                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 527                         goto delete;
 528                 }
 529                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 530                 return 1;
 531         }
 532
 533 delete:
 534         if (sdl->sdl_family != AF_LINK) {
 535                 printf("cannot locate %s\n", host);
 536                 return (1);
 537         }
 538         /*
 539          * need to reinit the field because it has rt_key
 540          * but we want the actual address
 541          */
 542         NEXTADDR(RTA_DST, sin_m);
 543         rtm->rtm_flags |= RTF_LLDATA;
 544         if (rtmsg(RTM_DELETE) == 0) {
 545                 getnameinfo((struct sockaddr *)sin,
 546                     sin->sin6_len, host_buf,
 547                     sizeof(host_buf), NULL, 0,
 548                     (nflag ? NI_NUMERICHOST : 0));
 549                 printf("%s (%s) deleted\n", host, host_buf);
 550         }
 551
 552         return 0;
 553 }
 554
 555 #define W_ADDR  36
 556 #define W_LL    17
 557 #define W_IF    6
 558
 559 /*
 560  * Dump the entire neighbor cache
 561  */
 562 void
 563 dump(addr, cflag)
 564         struct in6_addr *addr;
 565         int cflag;
 566 {
 567         int mib[6];
 568         size_t needed;
 569         char *lim, *buf, *next;
 570         struct rt_msghdr *rtm;
 571         struct sockaddr_in6 *sin;
 572         struct sockaddr_dl *sdl;
 573         extern int h_errno;
 574         struct in6_nbrinfo *nbi;
 575         struct timeval now;
 576         int addrwidth;
 577         int llwidth;
 578         int ifwidth;
 579         char flgbuf[8];
 580         char *ifname;
 581
 582         /* Print header */
 583         if (!tflag && !cflag)
 584                 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 585                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 586                     W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 587
 588 again:;
 589         mib[0] = CTL_NET;
 590         mib[1] = PF_ROUTE;
 591         mib[2] = 0;
 592         mib[3] = AF_INET6;
 593         mib[4] = NET_RT_FLAGS;
 594 #ifdef RTF_LLINFO
 595         mib[5] = RTF_LLINFO;
 596 #else
 597         mib[5] = 0;
 598 #endif
 599         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 600                 err(1, "sysctl(PF_ROUTE estimate)");
 601         if (needed > 0) {
 602                 if ((buf = malloc(needed)) == NULL)
 603                         err(1, "malloc");
 604                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 605                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 606                 lim = buf + needed;
 607         } else
 608                 buf = lim = NULL;
 609
 610         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 611                 int isrouter = 0, prbs = 0;
 612
 613                 rtm = (struct rt_msghdr *)next;
 614                 sin = (struct sockaddr_in6 *)(rtm + 1);
 615                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 616
 617                 /*
 618                  * Some OSes can produce a route that has the LINK flag but
 619                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 620                  * and BSD/OS, where xx is not the interface identifier on
 621                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 622                  * so we skip them.
 623                  * XXX: such routes should have the GATEWAY flag, not the
 624                  * LINK flag.  However, there is rotten routing software
 625                  * that advertises all routes that have the GATEWAY flag.
 626                  * Thus, KAME kernel intentionally does not set the LINK flag.
 627                  * What is to be fixed is not ndp, but such routing software
 628                  * (and the kernel workaround)...
 629                  */
 630                 if (sdl->sdl_family != AF_LINK)
 631                         continue;
 632
 633                 if (!(rtm->rtm_flags & RTF_HOST))
 634                         continue;
 635
 636                 if (addr) {
 637                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 638                                 continue;
 639                         found_entry = 1;
 640                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 641                         continue;
 642                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 643                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 644                         /* XXX: should scope id be filled in the kernel? */
 645                         if (sin->sin6_scope_id == 0)
 646                                 sin->sin6_scope_id = sdl->sdl_index;
 647                 }
 648                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 649                     sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
 650                 if (cflag) {
 651 #ifdef RTF_WASCLONED
 652                         if (rtm->rtm_flags & RTF_WASCLONED)
 653                                 delete(host_buf);
 654 #elif defined(RTF_CLONED)
 655                         if (rtm->rtm_flags & RTF_CLONED)
 656                                 delete(host_buf);
 657 #else
 658                         delete(host_buf);
 659 #endif
 660                         continue;
 661                 }
 662                 gettimeofday(&now, 0);
 663                 if (tflag)
 664                         ts_print(&now);
 665
 666                 addrwidth = strlen(host_buf);
 667                 if (addrwidth < W_ADDR)
 668                         addrwidth = W_ADDR;
 669                 llwidth = strlen(ether_str(sdl));
 670                 if (W_ADDR + W_LL - addrwidth > llwidth)
 671                         llwidth = W_ADDR + W_LL - addrwidth;
 672                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 673                 if (!ifname)
 674                         ifname = "?";
 675                 ifwidth = strlen(ifname);
 676                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 677                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 678
 679                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 680                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 681
 682                 /* Print neighbor discovery specific informations */
 683                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 684                 if (nbi) {
 685                         if (nbi->expire > now.tv_sec) {
 686                                 printf(" %-9.9s",
 687                                     sec2str(nbi->expire - now.tv_sec));
 688                         } else if (nbi->expire == 0)
 689                                 printf(" %-9.9s", "permanent");
 690                         else
 691                                 printf(" %-9.9s", "expired");
 692
 693                         switch (nbi->state) {
 694                         case ND6_LLINFO_NOSTATE:
 695                                  printf(" N");
 696                                  break;
 697 #ifdef ND6_LLINFO_WAITDELETE
 698                         case ND6_LLINFO_WAITDELETE:
 699                                  printf(" W");
 700                                  break;
 701 #endif
 702                         case ND6_LLINFO_INCOMPLETE:
 703                                  printf(" I");
 704                                  break;
 705                         case ND6_LLINFO_REACHABLE:
 706                                  printf(" R");
 707                                  break;
 708                         case ND6_LLINFO_STALE:
 709                                  printf(" S");
 710                                  break;
 711                         case ND6_LLINFO_DELAY:
 712                                  printf(" D");
 713                                  break;
 714                         case ND6_LLINFO_PROBE:
 715                                  printf(" P");
 716                                  break;
 717                         default:
 718                                  printf(" ?");
 719                                  break;
 720                         }
 721
 722                         isrouter = nbi->isrouter;
 723                         prbs = nbi->asked;
 724                 } else {
 725                         warnx("failed to get neighbor information");
 726                         printf("  ");
 727                 }
 728
 729                 /*
 730                  * other flags. R: router, P: proxy, W: ??
 731                  */
 732                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 733                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 734                             isrouter ? "R" : "",
 735                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 736                 } else {
 737                         sin = (struct sockaddr_in6 *)
 738                             (sdl->sdl_len + (char *)sdl);
 739 #if 0   /* W and P are mystery even for us */
 740                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 741                             isrouter ? "R" : "",
 742                             !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 743                             (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 744                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 745 #else
 746                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 747                             isrouter ? "R" : "",
 748                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 749 #endif
 750                 }
 751                 printf(" %s", flgbuf);
 752
 753                 if (prbs)
 754                         printf(" %d", prbs);
 755
 756                 printf("\n");
 757         }
 758         if (buf != NULL)
 759                 free(buf);
 760
 761         if (repeat) {
 762                 printf("\n");
 763                 fflush(stdout);
 764                 sleep(repeat);
 765                 goto again;
 766         }
 767 }
 768
 769 static struct in6_nbrinfo *
 770 getnbrinfo(addr, ifindex, warning)
 771         struct in6_addr *addr;
 772         int ifindex;
 773         int warning;
 774 {
 775         static struct in6_nbrinfo nbi;
 776         int s;
 777
 778         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 779                 err(1, "socket");
 780
 781         bzero(&nbi, sizeof(nbi));
 782         if_indextoname(ifindex, nbi.ifname);
 783         nbi.addr = *addr;
 784         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 785                 if (warning)
 786                         warn("ioctl(SIOCGNBRINFO_IN6)");
 787                 close(s);
 788                 return(NULL);
 789         }
 790
 791         close(s);
 792         return(&nbi);
 793 }
 794
 795 static char *
 796 ether_str(struct sockaddr_dl *sdl)
 797 {
 798         static char hbuf[NI_MAXHOST];
 799         char *cp;
 800
 801         if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 802                 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
 803                     sizeof(hbuf));
 804         } else if (sdl->sdl_alen) {
 805                 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
 806                 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
 807         } else
 808                 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
 809
 810         return(hbuf);
 811 }
 812
 813 int
 814 ndp_ether_aton(a, n)
 815         char *a;
 816         u_char *n;
 817 {
 818         int i, o[6];
 819
 820         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 821             &o[3], &o[4], &o[5]);
 822         if (i != 6) {
 823                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 824                 return (1);
 825         }
 826         for (i = 0; i < 6; i++)
 827                 n[i] = o[i];
 828         return (0);
 829 }
 830
 831 void
 832 usage()
 833 {
 834         printf("usage: ndp [-nt] hostname\n");
 835         printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
 836         printf("       ndp [-nt] -A wait\n");
 837         printf("       ndp [-nt] -d hostname\n");
 838         printf("       ndp [-nt] -f filename\n");
 839         printf("       ndp [-nt] -i interface [flags...]\n");
 840 #ifdef SIOCSDEFIFACE_IN6
 841         printf("       ndp [-nt] -I [interface|delete]\n");
 842 #endif
 843         printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
 844         exit(1);
 845 }
 846
 847 int
 848 rtmsg(cmd)
 849         int cmd;
 850 {
 851         static int seq;
 852         int rlen;
 853         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 854         register char *cp = m_rtmsg.m_space;
 855         register int l;
 856
 857         errno = 0;
 858         if (cmd == RTM_DELETE)
 859                 goto doit;
 860         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 861         rtm->rtm_flags = flags;
 862         rtm->rtm_version = RTM_VERSION;
 863
 864         switch (cmd) {
 865         default:
 866                 fprintf(stderr, "ndp: internal wrong cmd\n");
 867                 exit(1);
 868         case RTM_ADD:
 869                 rtm->rtm_addrs |= RTA_GATEWAY;
 870                 if (expire_time) {
 871                         rtm->rtm_rmx.rmx_expire = expire_time;
 872                         rtm->rtm_inits = RTV_EXPIRE;
 873                 }
 874                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
 875 #if 0 /* we don't support ipv6addr/128 type proxying */
 876                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 877                         rtm->rtm_flags &= ~RTF_HOST;
 878                         rtm->rtm_addrs |= RTA_NETMASK;
 879                 }
 880 #endif
 881                 /* FALLTHROUGH */
 882         case RTM_GET:
 883                 rtm->rtm_addrs |= RTA_DST;
 884         }
 885
 886         NEXTADDR(RTA_DST, sin_m);
 887         NEXTADDR(RTA_GATEWAY, sdl_m);
 888 #if 0 /* we don't support ipv6addr/128 type proxying */
 889         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 890         NEXTADDR(RTA_NETMASK, so_mask);
 891 #endif
 892
 893         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 894 doit:
 895         l = rtm->rtm_msglen;
 896         rtm->rtm_seq = ++seq;
 897         rtm->rtm_type = cmd;
 898         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 899                 if (errno != ESRCH || cmd != RTM_DELETE) {
 900                         err(1, "writing to routing socket");
 901                         /* NOTREACHED */
 902                 }
 903         }
 904         do {
 905                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 906         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 907         if (l < 0)
 908                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 909                     strerror(errno));
 910         return (0);
 911 }
 912
 913 void
 914 ifinfo(ifname, argc, argv)
 915         char *ifname;
 916         int argc;
 917         char **argv;
 918 {
 919         struct in6_ndireq nd;
 920         int i, s;
 921         u_int32_t newflags;
 922 #ifdef IPV6CTL_USETEMPADDR
 923         u_int8_t nullbuf[8];
 924 #endif
 925
 926         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 927                 err(1, "socket");
 928                 /* NOTREACHED */
 929         }
 930         bzero(&nd, sizeof(nd));
 931         strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
 932         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 933                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 934                 /* NOTREACHED */
 935         }
 936 #define ND nd.ndi
 937         newflags = ND.flags;
 938         for (i = 0; i < argc; i++) {
 939                 int clear = 0;
 940                 char *cp = argv[i];
 941
 942                 if (*cp == '-') {
 943                         clear = 1;
 944                         cp++;
 945                 }
 946
 947 #define SETFLAG(s, f) \
 948         do {\
 949                 if (strcmp(cp, (s)) == 0) {\
 950                         if (clear)\
 951                                 newflags &= ~(f);\
 952                         else\
 953                                 newflags |= (f);\
 954                 }\
 955         } while (0)
 956 /*
 957  * XXX: this macro is not 100% correct, in that it matches "nud" against
 958  *      "nudbogus".  But we just let it go since this is minor.
 959  */
 960 #define SETVALUE(f, v) \
 961         do { \
 962                 char *valptr; \
 963                 unsigned long newval; \
 964                 v = 0; /* unspecified */ \
 965                 if (strncmp(cp, f, strlen(f)) == 0) { \
 966                         valptr = strchr(cp, '='); \
 967                         if (valptr == NULL) \
 968                                 err(1, "syntax error in %s field", (f)); \
 969                         errno = 0; \
 970                         newval = strtoul(++valptr, NULL, 0); \
 971                         if (errno) \
 972                                 err(1, "syntax error in %s's value", (f)); \
 973                         v = newval; \
 974                 } \
 975         } while (0)
 976
 977                 SETFLAG("disabled", ND6_IFF_IFDISABLED);
 978                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 979 #ifdef ND6_IFF_ACCEPT_RTADV
 980                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 981 #endif
 982 #ifdef ND6_IFF_AUTO_LINKLOCAL
 983                 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
 984 #endif
 985 #ifdef ND6_IFF_NO_PREFER_IFACE
 986                 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
 987 #endif
 988                 SETVALUE("basereachable", ND.basereachable);
 989                 SETVALUE("retrans", ND.retrans);
 990                 SETVALUE("curhlim", ND.chlim);
 991
 992                 ND.flags = newflags;
 993                 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
 994                         err(1, "ioctl(SIOCSIFINFO_IN6)");
 995                         /* NOTREACHED */
 996                 }
 997 #undef SETFLAG
 998 #undef SETVALUE
 999         }
1000
1001         if (!ND.initialized) {
1002                 errx(1, "%s: not initialized yet", ifname);
1003                 /* NOTREACHED */
1004         }
1005
1006         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1007                 err(1, "ioctl(SIOCGIFINFO_IN6)");
1008                 /* NOTREACHED */
1009         }
1010         printf("linkmtu=%d", ND.linkmtu);
1011         printf(", maxmtu=%d", ND.maxmtu);
1012         printf(", curhlim=%d", ND.chlim);
1013         printf(", basereachable=%ds%dms",
1014             ND.basereachable / 1000, ND.basereachable % 1000);
1015         printf(", reachable=%ds", ND.reachable);
1016         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1017 #ifdef IPV6CTL_USETEMPADDR
1018         memset(nullbuf, 0, sizeof(nullbuf));
1019         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1020                 int j;
1021                 u_int8_t *rbuf;
1022
1023                 for (i = 0; i < 3; i++) {
1024                         switch (i) {
1025                         case 0:
1026                                 printf("\nRandom seed(0): ");
1027                                 rbuf = ND.randomseed0;
1028                                 break;
1029                         case 1:
1030                                 printf("\nRandom seed(1): ");
1031                                 rbuf = ND.randomseed1;
1032                                 break;
1033                         case 2:
1034                                 printf("\nRandom ID:      ");
1035                                 rbuf = ND.randomid;
1036                                 break;
1037                         default:
1038                                 errx(1, "impossible case for tempaddr display");
1039                         }
1040                         for (j = 0; j < 8; j++)
1041                                 printf("%02x", rbuf[j]);
1042                 }
1043         }
1044 #endif
1045         if (ND.flags) {
1046                 printf("\nFlags: ");
1047 #ifdef ND6_IFF_IFDISABLED
1048                 if ((ND.flags & ND6_IFF_IFDISABLED))
1049                         printf("disabled ");
1050 #endif
1051                 if ((ND.flags & ND6_IFF_PERFORMNUD))
1052                         printf("nud ");
1053 #ifdef ND6_IFF_ACCEPT_RTADV
1054                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1055                         printf("accept_rtadv ");
1056 #endif
1057 #ifdef ND6_IFF_AUTO_LINKLOCAL
1058                 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1059                         printf("auto_linklocal ");
1060 #endif
1061 #ifdef ND6_IFF_NO_PREFER_IFACE
1062                 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1063                         printf("no_prefer_iface ");
1064 #endif
1065         }
1066         putc('\n', stdout);
1067 #undef ND
1068
1069         close(s);
1070 }
1071
1072 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1073 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1074 #endif
1075
1076 void
1077 rtrlist()
1078 {
1079 #ifdef ICMPV6CTL_ND6_DRLIST
1080         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1081         char *buf;
1082         struct in6_defrouter *p, *ep;
1083         size_t l;
1084         struct timeval now;
1085
1086         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1087                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1088                 /*NOTREACHED*/
1089         }
1090         if (l == 0)
1091                 return;
1092         buf = malloc(l);
1093         if (!buf) {
1094                 err(1, "malloc");
1095                 /*NOTREACHED*/
1096         }
1097         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1098                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1099                 /*NOTREACHED*/
1100         }
1101
1102         ep = (struct in6_defrouter *)(buf + l);
1103         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1104                 int rtpref;
1105
1106                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1107                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1108                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1109                         strlcpy(host_buf, "?", sizeof(host_buf));
1110
1111                 printf("%s if=%s", host_buf,
1112                     if_indextoname(p->if_index, ifix_buf));
1113                 printf(", flags=%s%s",
1114                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1115                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1116                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1117                 printf(", pref=%s", rtpref_str[rtpref]);
1118
1119                 gettimeofday(&now, 0);
1120                 if (p->expire == 0)
1121                         printf(", expire=Never\n");
1122                 else
1123                         printf(", expire=%s\n",
1124                             sec2str(p->expire - now.tv_sec));
1125         }
1126         free(buf);
1127 #else
1128         struct in6_drlist dr;
1129         int s, i;
1130         struct timeval now;
1131
1132         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1133                 err(1, "socket");
1134                 /* NOTREACHED */
1135         }
1136         bzero(&dr, sizeof(dr));
1137         strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1138         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1139                 err(1, "ioctl(SIOCGDRLST_IN6)");
1140                 /* NOTREACHED */
1141         }
1142 #define DR dr.defrouter[i]
1143         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1144                 struct sockaddr_in6 sin6;
1145
1146                 bzero(&sin6, sizeof(sin6));
1147                 sin6.sin6_family = AF_INET6;
1148                 sin6.sin6_len = sizeof(sin6);
1149                 sin6.sin6_addr = DR.rtaddr;
1150                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1151                     sizeof(host_buf), NULL, 0,
1152                     (nflag ? NI_NUMERICHOST : 0));
1153
1154                 printf("%s if=%s", host_buf,
1155                     if_indextoname(DR.if_index, ifix_buf));
1156                 printf(", flags=%s%s",
1157                     DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1158                     DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1159                 gettimeofday(&now, 0);
1160                 if (DR.expire == 0)
1161                         printf(", expire=Never\n");
1162                 else
1163                         printf(", expire=%s\n",
1164                             sec2str(DR.expire - now.tv_sec));
1165         }
1166 #undef DR
1167         close(s);
1168 #endif
1169 }
1170
1171 void
1172 plist()
1173 {
1174 #ifdef ICMPV6CTL_ND6_PRLIST
1175         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1176         char *buf;
1177         struct in6_prefix *p, *ep, *n;
1178         struct sockaddr_in6 *advrtr;
1179         size_t l;
1180         struct timeval now;
1181         const int niflags = NI_NUMERICHOST;
1182         int ninflags = nflag ? NI_NUMERICHOST : 0;
1183         char namebuf[NI_MAXHOST];
1184
1185         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1186                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1187                 /*NOTREACHED*/
1188         }
1189         buf = malloc(l);
1190         if (!buf) {
1191                 err(1, "malloc");
1192                 /*NOTREACHED*/
1193         }
1194         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1195                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1196                 /*NOTREACHED*/
1197         }
1198
1199         ep = (struct in6_prefix *)(buf + l);
1200         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1201                 advrtr = (struct sockaddr_in6 *)(p + 1);
1202                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1203
1204                 if (getnameinfo((struct sockaddr *)&p->prefix,
1205                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1206                     NULL, 0, niflags) != 0)
1207                         strlcpy(namebuf, "?", sizeof(namebuf));
1208                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1209                     if_indextoname(p->if_index, ifix_buf));
1210
1211                 gettimeofday(&now, 0);
1212                 /*
1213                  * meaning of fields, especially flags, is very different
1214                  * by origin.  notify the difference to the users.
1215                  */
1216                 printf("flags=%s%s%s%s%s",
1217                     p->raflags.onlink ? "L" : "",
1218                     p->raflags.autonomous ? "A" : "",
1219                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1220                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1221 #ifdef NDPRF_HOME
1222                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1223 #else
1224                     ""
1225 #endif
1226                     );
1227                 if (p->vltime == ND6_INFINITE_LIFETIME)
1228                         printf(" vltime=infinity");
1229                 else
1230                         printf(" vltime=%lu", (unsigned long)p->vltime);
1231                 if (p->pltime == ND6_INFINITE_LIFETIME)
1232                         printf(", pltime=infinity");
1233                 else
1234                         printf(", pltime=%lu", (unsigned long)p->pltime);
1235                 if (p->expire == 0)
1236                         printf(", expire=Never");
1237                 else if (p->expire >= now.tv_sec)
1238                         printf(", expire=%s",
1239                             sec2str(p->expire - now.tv_sec));
1240                 else
1241                         printf(", expired");
1242                 printf(", ref=%d", p->refcnt);
1243                 printf("\n");
1244                 /*
1245                  * "advertising router" list is meaningful only if the prefix
1246                  * information is from RA.
1247                  */
1248                 if (p->advrtrs) {
1249                         int j;
1250                         struct sockaddr_in6 *sin6;
1251
1252                         sin6 = advrtr;
1253                         printf("  advertised by\n");
1254                         for (j = 0; j < p->advrtrs; j++) {
1255                                 struct in6_nbrinfo *nbi;
1256
1257                                 if (getnameinfo((struct sockaddr *)sin6,
1258                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1259                                     NULL, 0, ninflags) != 0)
1260                                         strlcpy(namebuf, "?", sizeof(namebuf));
1261                                 printf("    %s", namebuf);
1262
1263                                 nbi = getnbrinfo(&sin6->sin6_addr,
1264                                     p->if_index, 0);
1265                                 if (nbi) {
1266                                         switch (nbi->state) {
1267                                         case ND6_LLINFO_REACHABLE:
1268                                         case ND6_LLINFO_STALE:
1269                                         case ND6_LLINFO_DELAY:
1270                                         case ND6_LLINFO_PROBE:
1271                                                 printf(" (reachable)\n");
1272                                                 break;
1273                                         default:
1274                                                 printf(" (unreachable)\n");
1275                                         }
1276                                 } else
1277                                         printf(" (no neighbor state)\n");
1278                                 sin6++;
1279                         }
1280                 } else
1281                         printf("  No advertising router\n");
1282         }
1283         free(buf);
1284 #else
1285         struct in6_prlist pr;
1286         int s, i;
1287         struct timeval now;
1288
1289         gettimeofday(&now, 0);
1290
1291         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1292                 err(1, "socket");
1293                 /* NOTREACHED */
1294         }
1295         bzero(&pr, sizeof(pr));
1296         strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1297         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1298                 err(1, "ioctl(SIOCGPRLST_IN6)");
1299                 /* NOTREACHED */
1300         }
1301 #define PR pr.prefix[i]
1302         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1303                 struct sockaddr_in6 p6;
1304                 char namebuf[NI_MAXHOST];
1305                 int niflags;
1306
1307 #ifdef NDPRF_ONLINK
1308                 p6 = PR.prefix;
1309 #else
1310                 memset(&p6, 0, sizeof(p6));
1311                 p6.sin6_family = AF_INET6;
1312                 p6.sin6_len = sizeof(p6);
1313                 p6.sin6_addr = PR.prefix;
1314 #endif
1315                 niflags = NI_NUMERICHOST;
1316                 if (getnameinfo((struct sockaddr *)&p6,
1317                     sizeof(p6), namebuf, sizeof(namebuf),
1318                     NULL, 0, niflags)) {
1319                         warnx("getnameinfo failed");
1320                         continue;
1321                 }
1322                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1323                     if_indextoname(PR.if_index, ifix_buf));
1324
1325                 gettimeofday(&now, 0);
1326                 /*
1327                  * meaning of fields, especially flags, is very different
1328                  * by origin.  notify the difference to the users.
1329                  */
1330 #if 0
1331                 printf("  %s",
1332                     PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1333 #endif
1334 #ifdef NDPRF_ONLINK
1335                 printf("flags=%s%s%s%s%s",
1336                     PR.raflags.onlink ? "L" : "",
1337                     PR.raflags.autonomous ? "A" : "",
1338                     (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1339                     (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1340 #ifdef NDPRF_HOME
1341                     (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1342 #else
1343                     ""
1344 #endif
1345                     );
1346 #else
1347                 printf("flags=%s%s",
1348                     PR.raflags.onlink ? "L" : "",
1349                     PR.raflags.autonomous ? "A" : "");
1350 #endif
1351                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1352                         printf(" vltime=infinity");
1353                 else
1354                         printf(" vltime=%lu", PR.vltime);
1355                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1356                         printf(", pltime=infinity");
1357                 else
1358                         printf(", pltime=%lu", PR.pltime);
1359                 if (PR.expire == 0)
1360                         printf(", expire=Never");
1361                 else if (PR.expire >= now.tv_sec)
1362                         printf(", expire=%s",
1363                             sec2str(PR.expire - now.tv_sec));
1364                 else
1365                         printf(", expired");
1366 #ifdef NDPRF_ONLINK
1367                 printf(", ref=%d", PR.refcnt);
1368 #endif
1369 #if 0
1370                 switch (PR.origin) {
1371                 case PR_ORIG_RA:
1372                         printf(", origin=RA");
1373                         break;
1374                 case PR_ORIG_RR:
1375                         printf(", origin=RR");
1376                         break;
1377                 case PR_ORIG_STATIC:
1378                         printf(", origin=static");
1379                         break;
1380                 case PR_ORIG_KERNEL:
1381                         printf(", origin=kernel");
1382                         break;
1383                 default:
1384                         printf(", origin=?");
1385                         break;
1386                 }
1387 #endif
1388                 printf("\n");
1389                 /*
1390                  * "advertising router" list is meaningful only if the prefix
1391                  * information is from RA.
1392                  */
1393                 if (0 &&        /* prefix origin is almost obsolted */
1394                     PR.origin != PR_ORIG_RA)
1395                         ;
1396                 else if (PR.advrtrs) {
1397                         int j;
1398                         printf("  advertised by\n");
1399                         for (j = 0; j < PR.advrtrs; j++) {
1400                                 struct sockaddr_in6 sin6;
1401                                 struct in6_nbrinfo *nbi;
1402
1403                                 bzero(&sin6, sizeof(sin6));
1404                                 sin6.sin6_family = AF_INET6;
1405                                 sin6.sin6_len = sizeof(sin6);
1406                                 sin6.sin6_addr = PR.advrtr[j];
1407                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1408                                 getnameinfo((struct sockaddr *)&sin6,
1409                                     sin6.sin6_len, host_buf,
1410                                     sizeof(host_buf), NULL, 0,
1411                                     (nflag ? NI_NUMERICHOST : 0));
1412                                 printf("    %s", host_buf);
1413
1414                                 nbi = getnbrinfo(&sin6.sin6_addr,
1415                                     PR.if_index, 0);
1416                                 if (nbi) {
1417                                         switch (nbi->state) {
1418                                         case ND6_LLINFO_REACHABLE:
1419                                         case ND6_LLINFO_STALE:
1420                                         case ND6_LLINFO_DELAY:
1421                                         case ND6_LLINFO_PROBE:
1422                                                  printf(" (reachable)\n");
1423                                                  break;
1424                                         default:
1425                                                  printf(" (unreachable)\n");
1426                                         }
1427                                 } else
1428                                         printf(" (no neighbor state)\n");
1429                         }
1430                         if (PR.advrtrs > DRLSTSIZ)
1431                                 printf("    and %d routers\n",
1432                                     PR.advrtrs - DRLSTSIZ);
1433                 } else
1434                         printf("  No advertising router\n");
1435         }
1436 #undef PR
1437         close(s);
1438 #endif
1439 }
1440
1441 void
1442 pfx_flush()
1443 {
1444         char dummyif[IFNAMSIZ+8];
1445         int s;
1446
1447         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1448                 err(1, "socket");
1449         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1450         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1451                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1452 }
1453
1454 void
1455 rtr_flush()
1456 {
1457         char dummyif[IFNAMSIZ+8];
1458         int s;
1459
1460         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1461                 err(1, "socket");
1462         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1463         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1464                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1465
1466         close(s);
1467 }
1468
1469 void
1470 harmonize_rtr()
1471 {
1472         char dummyif[IFNAMSIZ+8];
1473         int s;
1474
1475         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1476                 err(1, "socket");
1477         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1478         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1479                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1480
1481         close(s);
1482 }
1483
1484 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1485 static void
1486 setdefif(ifname)
1487         char *ifname;
1488 {
1489         struct in6_ndifreq ndifreq;
1490         unsigned int ifindex;
1491
1492         if (strcasecmp(ifname, "delete") == 0)
1493                 ifindex = 0;
1494         else {
1495                 if ((ifindex = if_nametoindex(ifname)) == 0)
1496                         err(1, "failed to resolve i/f index for %s", ifname);
1497         }
1498
1499         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1500                 err(1, "socket");
1501
1502         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1503         ndifreq.ifindex = ifindex;
1504
1505         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1506                 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1507
1508         close(s);
1509 }
1510
1511 static void
1512 getdefif()
1513 {
1514         struct in6_ndifreq ndifreq;
1515         char ifname[IFNAMSIZ+8];
1516
1517         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1518                 err(1, "socket");
1519
1520         memset(&ndifreq, 0, sizeof(ndifreq));
1521         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1522
1523         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1524                 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1525
1526         if (ndifreq.ifindex == 0)
1527                 printf("No default interface.\n");
1528         else {
1529                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1530                         err(1, "failed to resolve ifname for index %lu",
1531                             ndifreq.ifindex);
1532                 printf("ND default interface = %s\n", ifname);
1533         }
1534
1535         close(s);
1536 }
1537 #endif
1538
1539 static char *
1540 sec2str(total)
1541         time_t total;
1542 {
1543         static char result[256];
1544         int days, hours, mins, secs;
1545         int first = 1;
1546         char *p = result;
1547         char *ep = &result[sizeof(result)];
1548         int n;
1549
1550         days = total / 3600 / 24;
1551         hours = (total / 3600) % 24;
1552         mins = (total / 60) % 60;
1553         secs = total % 60;
1554
1555         if (days) {
1556                 first = 0;
1557                 n = snprintf(p, ep - p, "%dd", days);
1558                 if (n < 0 || n >= ep - p)
1559                         return "?";
1560                 p += n;
1561         }
1562         if (!first || hours) {
1563                 first = 0;
1564                 n = snprintf(p, ep - p, "%dh", hours);
1565                 if (n < 0 || n >= ep - p)
1566                         return "?";
1567                 p += n;
1568         }
1569         if (!first || mins) {
1570                 first = 0;
1571                 n = snprintf(p, ep - p, "%dm", mins);
1572                 if (n < 0 || n >= ep - p)
1573                         return "?";
1574                 p += n;
1575         }
1576         snprintf(p, ep - p, "%ds", secs);
1577
1578         return(result);
1579 }
1580
1581 /*
1582  * Print the timestamp
1583  * from tcpdump/util.c
1584  */
1585 static void
1586 ts_print(tvp)
1587         const struct timeval *tvp;
1588 {
1589         int s;
1590
1591         /* Default */
1592         s = (tvp->tv_sec + thiszone) % 86400;
1593         (void)printf("%02d:%02d:%02d.%06u ",
1594             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1595 }
1596
1597 #undef NEXTADDR