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 int     expire_time, flags, found_entry;
 376 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 int
 385 set(argc, argv)
 386         int argc;
 387         char **argv;
 388 {
 389         register struct sockaddr_in6 *sin = &sin_m;
 390         register struct sockaddr_dl *sdl;
 391         register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 392         struct addrinfo hints, *res;
 393         int gai_error;
 394         u_char *ea;
 395         char *host = argv[0], *eaddr = argv[1];
 396
 397         getsocket();
 398         argc -= 2;
 399         argv += 2;
 400         sdl_m = blank_sdl;
 401         sin_m = blank_sin;
 402
 403         bzero(&hints, sizeof(hints));
 404         hints.ai_family = AF_INET6;
 405         gai_error = getaddrinfo(host, NULL, &hints, &res);
 406         if (gai_error) {
 407                 fprintf(stderr, "ndp: %s: %s\n", host,
 408                         gai_strerror(gai_error));
 409                 return 1;
 410         }
 411         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 412 #ifdef __KAME__
 413         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 414                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 415                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 416         }
 417 #endif
 418         ea = (u_char *)LLADDR(&sdl_m);
 419         if (ndp_ether_aton(eaddr, ea) == 0)
 420                 sdl_m.sdl_alen = 6;
 421         flags = expire_time = 0;
 422         while (argc-- > 0) {
 423                 if (strncmp(argv[0], "temp", 4) == 0) {
 424                         struct timeval time;
 425
 426                         gettimeofday(&time, 0);
 427                         expire_time = time.tv_sec + 20 * 60;
 428                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 429                         flags |= RTF_ANNOUNCE;
 430                 argv++;
 431         }
 432         if (rtmsg(RTM_GET) < 0) {
 433                 errx(1, "RTM_GET(%s) failed", host);
 434                 /* NOTREACHED */
 435         }
 436         sin = (struct sockaddr_in6 *)(rtm + 1);
 437         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 438         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 439                 if (sdl->sdl_family == AF_LINK &&
 440                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 441                         switch (sdl->sdl_type) {
 442                         case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 443                         case IFT_ISO88024: case IFT_ISO88025:
 444                         case IFT_L2VLAN: case IFT_BRIDGE:
 445                                 goto overwrite;
 446                         }
 447                 }
 448                 /*
 449                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 450                  */
 451                 fprintf(stderr, "set: cannot configure a new entry\n");
 452                 return 1;
 453         }
 454
 455 overwrite:
 456         if (sdl->sdl_family != AF_LINK) {
 457                 printf("cannot intuit interface index and type for %s\n", host);
 458                 return (1);
 459         }
 460         sdl_m.sdl_type = sdl->sdl_type;
 461         sdl_m.sdl_index = sdl->sdl_index;
 462         return (rtmsg(RTM_ADD));
 463 }
 464
 465 /*
 466  * Display an individual neighbor cache entry
 467  */
 468 void
 469 get(host)
 470         char *host;
 471 {
 472         struct sockaddr_in6 *sin = &sin_m;
 473         struct addrinfo hints, *res;
 474         int gai_error;
 475
 476         sin_m = blank_sin;
 477         bzero(&hints, sizeof(hints));
 478         hints.ai_family = AF_INET6;
 479         gai_error = getaddrinfo(host, NULL, &hints, &res);
 480         if (gai_error) {
 481                 fprintf(stderr, "ndp: %s: %s\n", host,
 482                     gai_strerror(gai_error));
 483                 return;
 484         }
 485         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 486 #ifdef __KAME__
 487         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 488                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 489                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 490         }
 491 #endif
 492         dump(&sin->sin6_addr, 0);
 493         if (found_entry == 0) {
 494                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 495                     sizeof(host_buf), NULL ,0,
 496                     (nflag ? NI_NUMERICHOST : 0));
 497                 printf("%s (%s) -- no entry\n", host, host_buf);
 498                 exit(1);
 499         }
 500 }
 501
 502 /*
 503  * Delete a neighbor cache entry
 504  */
 505 int
 506 delete(host)
 507         char *host;
 508 {
 509         struct sockaddr_in6 *sin = &sin_m;
 510         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 511         register char *cp = m_rtmsg.m_space;
 512         struct sockaddr_dl *sdl;
 513         struct addrinfo hints, *res;
 514         int gai_error;
 515
 516         getsocket();
 517         sin_m = blank_sin;
 518
 519         bzero(&hints, sizeof(hints));
 520         hints.ai_family = AF_INET6;
 521         gai_error = getaddrinfo(host, NULL, &hints, &res);
 522         if (gai_error) {
 523                 fprintf(stderr, "ndp: %s: %s\n", host,
 524                     gai_strerror(gai_error));
 525                 return 1;
 526         }
 527         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 528 #ifdef __KAME__
 529         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 530                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 531                     htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 532         }
 533 #endif
 534         if (rtmsg(RTM_GET) < 0) {
 535                 errx(1, "RTM_GET(%s) failed", host);
 536                 /* NOTREACHED */
 537         }
 538         sin = (struct sockaddr_in6 *)(rtm + 1);
 539         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 540         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 541                 if (sdl->sdl_family == AF_LINK &&
 542                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 543                         goto delete;
 544                 }
 545                 /*
 546                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 547                  */
 548                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 549                 return 1;
 550         }
 551
 552 delete:
 553         if (sdl->sdl_family != AF_LINK) {
 554                 printf("cannot locate %s\n", host);
 555                 return (1);
 556         }
 557         /*
 558          * need to reinit the field because it has rt_key
 559          * but we want the actual address
 560          */
 561         NEXTADDR(RTA_DST, sin_m);
 562         rtm->rtm_flags |= RTF_LLDATA;
 563         if (rtmsg(RTM_DELETE) == 0) {
 564                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 565
 566 #ifdef __KAME__
 567                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 568                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 569                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 570                 }
 571 #endif
 572                 getnameinfo((struct sockaddr *)&s6,
 573                     s6.sin6_len, host_buf,
 574                     sizeof(host_buf), NULL, 0,
 575                     (nflag ? NI_NUMERICHOST : 0));
 576                 printf("%s (%s) deleted\n", host, host_buf);
 577         }
 578
 579         return 0;
 580 }
 581
 582 #define W_ADDR  36
 583 #define W_LL    17
 584 #define W_IF    6
 585
 586 /*
 587  * Dump the entire neighbor cache
 588  */
 589 void
 590 dump(addr, cflag)
 591         struct in6_addr *addr;
 592         int cflag;
 593 {
 594         int mib[6];
 595         size_t needed;
 596         char *lim, *buf, *next;
 597         struct rt_msghdr *rtm;
 598         struct sockaddr_in6 *sin;
 599         struct sockaddr_dl *sdl;
 600         extern int h_errno;
 601         struct in6_nbrinfo *nbi;
 602         struct timeval time;
 603         int addrwidth;
 604         int llwidth;
 605         int ifwidth;
 606         char flgbuf[8];
 607         char *ifname;
 608
 609         /* Print header */
 610         if (!tflag && !cflag)
 611                 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 612                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 613                     W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 614
 615 again:;
 616         mib[0] = CTL_NET;
 617         mib[1] = PF_ROUTE;
 618         mib[2] = 0;
 619         mib[3] = AF_INET6;
 620         mib[4] = NET_RT_FLAGS;
 621 #ifdef RTF_LLINFO
 622         mib[5] = RTF_LLINFO;
 623 #else
 624         mib[5] = 0;
 625 #endif
 626         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 627                 err(1, "sysctl(PF_ROUTE estimate)");
 628         if (needed > 0) {
 629                 if ((buf = malloc(needed)) == NULL)
 630                         err(1, "malloc");
 631                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 632                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 633                 lim = buf + needed;
 634         } else
 635                 buf = lim = NULL;
 636
 637         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 638                 int isrouter = 0, prbs = 0;
 639
 640                 rtm = (struct rt_msghdr *)next;
 641                 sin = (struct sockaddr_in6 *)(rtm + 1);
 642                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 643
 644                 /*
 645                  * Some OSes can produce a route that has the LINK flag but
 646                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 647                  * and BSD/OS, where xx is not the interface identifier on
 648                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 649                  * so we skip them.
 650                  * XXX: such routes should have the GATEWAY flag, not the
 651                  * LINK flag.  However, there is rotten routing software
 652                  * that advertises all routes that have the GATEWAY flag.
 653                  * Thus, KAME kernel intentionally does not set the LINK flag.
 654                  * What is to be fixed is not ndp, but such routing software
 655                  * (and the kernel workaround)...
 656                  */
 657                 if (sdl->sdl_family != AF_LINK)
 658                         continue;
 659
 660                 if (!(rtm->rtm_flags & RTF_HOST))
 661                         continue;
 662
 663                 if (addr) {
 664                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 665                                 continue;
 666                         found_entry = 1;
 667                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 668                         continue;
 669                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 670                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 671                         /* XXX: should scope id be filled in the kernel? */
 672                         if (sin->sin6_scope_id == 0)
 673                                 sin->sin6_scope_id = sdl->sdl_index;
 674 #ifdef __KAME__
 675                         /* KAME specific hack; removed the embedded id */
 676                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 677 #endif
 678                 }
 679                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 680                     sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
 681                 if (cflag) {
 682 #ifdef RTF_WASCLONED
 683                         if (rtm->rtm_flags & RTF_WASCLONED)
 684                                 delete(host_buf);
 685 #elif defined(RTF_CLONED)
 686                         if (rtm->rtm_flags & RTF_CLONED)
 687                                 delete(host_buf);
 688 #else
 689                         delete(host_buf);
 690 #endif
 691                         continue;
 692                 }
 693                 gettimeofday(&time, 0);
 694                 if (tflag)
 695                         ts_print(&time);
 696
 697                 addrwidth = strlen(host_buf);
 698                 if (addrwidth < W_ADDR)
 699                         addrwidth = W_ADDR;
 700                 llwidth = strlen(ether_str(sdl));
 701                 if (W_ADDR + W_LL - addrwidth > llwidth)
 702                         llwidth = W_ADDR + W_LL - addrwidth;
 703                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 704                 if (!ifname)
 705                         ifname = "?";
 706                 ifwidth = strlen(ifname);
 707                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 708                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 709
 710                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 711                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 712
 713                 /* Print neighbor discovery specific informations */
 714                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 715                 if (nbi) {
 716                         if (nbi->expire > time.tv_sec) {
 717                                 printf(" %-9.9s",
 718                                     sec2str(nbi->expire - time.tv_sec));
 719                         } else if (nbi->expire == 0)
 720                                 printf(" %-9.9s", "permanent");
 721                         else
 722                                 printf(" %-9.9s", "expired");
 723
 724                         switch (nbi->state) {
 725                         case ND6_LLINFO_NOSTATE:
 726                                  printf(" N");
 727                                  break;
 728 #ifdef ND6_LLINFO_WAITDELETE
 729                         case ND6_LLINFO_WAITDELETE:
 730                                  printf(" W");
 731                                  break;
 732 #endif
 733                         case ND6_LLINFO_INCOMPLETE:
 734                                  printf(" I");
 735                                  break;
 736                         case ND6_LLINFO_REACHABLE:
 737                                  printf(" R");
 738                                  break;
 739                         case ND6_LLINFO_STALE:
 740                                  printf(" S");
 741                                  break;
 742                         case ND6_LLINFO_DELAY:
 743                                  printf(" D");
 744                                  break;
 745                         case ND6_LLINFO_PROBE:
 746                                  printf(" P");
 747                                  break;
 748                         default:
 749                                  printf(" ?");
 750                                  break;
 751                         }
 752
 753                         isrouter = nbi->isrouter;
 754                         prbs = nbi->asked;
 755                 } else {
 756                         warnx("failed to get neighbor information");
 757                         printf("  ");
 758                 }
 759
 760                 /*
 761                  * other flags. R: router, P: proxy, W: ??
 762                  */
 763                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 764                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 765                             isrouter ? "R" : "",
 766                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 767                 } else {
 768                         sin = (struct sockaddr_in6 *)
 769                             (sdl->sdl_len + (char *)sdl);
 770 #if 0   /* W and P are mystery even for us */
 771                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 772                             isrouter ? "R" : "",
 773                             !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 774                             (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 775                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 776 #else
 777                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 778                             isrouter ? "R" : "",
 779                             (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 780 #endif
 781                 }
 782                 printf(" %s", flgbuf);
 783
 784                 if (prbs)
 785                         printf(" %d", prbs);
 786
 787                 printf("\n");
 788         }
 789         if (buf != NULL)
 790                 free(buf);
 791
 792         if (repeat) {
 793                 printf("\n");
 794                 fflush(stdout);
 795                 sleep(repeat);
 796                 goto again;
 797         }
 798 }
 799
 800 static struct in6_nbrinfo *
 801 getnbrinfo(addr, ifindex, warning)
 802         struct in6_addr *addr;
 803         int ifindex;
 804         int warning;
 805 {
 806         static struct in6_nbrinfo nbi;
 807         int s;
 808
 809         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 810                 err(1, "socket");
 811
 812         bzero(&nbi, sizeof(nbi));
 813         if_indextoname(ifindex, nbi.ifname);
 814         nbi.addr = *addr;
 815         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 816                 if (warning)
 817                         warn("ioctl(SIOCGNBRINFO_IN6)");
 818                 close(s);
 819                 return(NULL);
 820         }
 821
 822         close(s);
 823         return(&nbi);
 824 }
 825
 826 static char *
 827 ether_str(struct sockaddr_dl *sdl)
 828 {
 829         static char hbuf[NI_MAXHOST];
 830         char *cp;
 831
 832         if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 833                 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
 834                     sizeof(hbuf));
 835         } else if (sdl->sdl_alen) {
 836                 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
 837                 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
 838         } else
 839                 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
 840
 841         return(hbuf);
 842 }
 843
 844 int
 845 ndp_ether_aton(a, n)
 846         char *a;
 847         u_char *n;
 848 {
 849         int i, o[6];
 850
 851         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 852             &o[3], &o[4], &o[5]);
 853         if (i != 6) {
 854                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 855                 return (1);
 856         }
 857         for (i = 0; i < 6; i++)
 858                 n[i] = o[i];
 859         return (0);
 860 }
 861
 862 void
 863 usage()
 864 {
 865         printf("usage: ndp [-nt] hostname\n");
 866         printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
 867         printf("       ndp [-nt] -A wait\n");
 868         printf("       ndp [-nt] -d hostname\n");
 869         printf("       ndp [-nt] -f filename\n");
 870         printf("       ndp [-nt] -i interface [flags...]\n");
 871 #ifdef SIOCSDEFIFACE_IN6
 872         printf("       ndp [-nt] -I [interface|delete]\n");
 873 #endif
 874         printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
 875         exit(1);
 876 }
 877
 878 int
 879 rtmsg(cmd)
 880         int cmd;
 881 {
 882         static int seq;
 883         int rlen;
 884         register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 885         register char *cp = m_rtmsg.m_space;
 886         register int l;
 887
 888         errno = 0;
 889         if (cmd == RTM_DELETE)
 890                 goto doit;
 891         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 892         rtm->rtm_flags = flags;
 893         rtm->rtm_version = RTM_VERSION;
 894
 895         switch (cmd) {
 896         default:
 897                 fprintf(stderr, "ndp: internal wrong cmd\n");
 898                 exit(1);
 899         case RTM_ADD:
 900                 rtm->rtm_addrs |= RTA_GATEWAY;
 901                 if (expire_time) {
 902                         rtm->rtm_rmx.rmx_expire = expire_time;
 903                         rtm->rtm_inits = RTV_EXPIRE;
 904                 }
 905                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
 906 #if 0 /* we don't support ipv6addr/128 type proxying */
 907                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 908                         rtm->rtm_flags &= ~RTF_HOST;
 909                         rtm->rtm_addrs |= RTA_NETMASK;
 910                 }
 911 #endif
 912                 /* FALLTHROUGH */
 913         case RTM_GET:
 914                 rtm->rtm_addrs |= RTA_DST;
 915         }
 916
 917         NEXTADDR(RTA_DST, sin_m);
 918         NEXTADDR(RTA_GATEWAY, sdl_m);
 919 #if 0 /* we don't support ipv6addr/128 type proxying */
 920         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 921         NEXTADDR(RTA_NETMASK, so_mask);
 922 #endif
 923
 924         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 925 doit:
 926         l = rtm->rtm_msglen;
 927         rtm->rtm_seq = ++seq;
 928         rtm->rtm_type = cmd;
 929         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 930                 if (errno != ESRCH || cmd != RTM_DELETE) {
 931                         err(1, "writing to routing socket");
 932                         /* NOTREACHED */
 933                 }
 934         }
 935         do {
 936                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 937         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 938         if (l < 0)
 939                 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
 940                     strerror(errno));
 941         return (0);
 942 }
 943
 944 void
 945 ifinfo(ifname, argc, argv)
 946         char *ifname;
 947         int argc;
 948         char **argv;
 949 {
 950         struct in6_ndireq nd;
 951         int i, s;
 952         u_int32_t newflags;
 953 #ifdef IPV6CTL_USETEMPADDR
 954         u_int8_t nullbuf[8];
 955 #endif
 956
 957         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 958                 err(1, "socket");
 959                 /* NOTREACHED */
 960         }
 961         bzero(&nd, sizeof(nd));
 962         strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
 963         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 964                 err(1, "ioctl(SIOCGIFINFO_IN6)");
 965                 /* NOTREACHED */
 966         }
 967 #define ND nd.ndi
 968         newflags = ND.flags;
 969         for (i = 0; i < argc; i++) {
 970                 int clear = 0;
 971                 char *cp = argv[i];
 972
 973                 if (*cp == '-') {
 974                         clear = 1;
 975                         cp++;
 976                 }
 977
 978 #define SETFLAG(s, f) \
 979         do {\
 980                 if (strcmp(cp, (s)) == 0) {\
 981                         if (clear)\
 982                                 newflags &= ~(f);\
 983                         else\
 984                                 newflags |= (f);\
 985                 }\
 986         } while (0)
 987 /*
 988  * XXX: this macro is not 100% correct, in that it matches "nud" against
 989  *      "nudbogus".  But we just let it go since this is minor.
 990  */
 991 #define SETVALUE(f, v) \
 992         do { \
 993                 char *valptr; \
 994                 unsigned long newval; \
 995                 v = 0; /* unspecified */ \
 996                 if (strncmp(cp, f, strlen(f)) == 0) { \
 997                         valptr = strchr(cp, '='); \
 998                         if (valptr == NULL) \
 999                                 err(1, "syntax error in %s field", (f)); \
1000                         errno = 0; \
1001                         newval = strtoul(++valptr, NULL, 0); \
1002                         if (errno) \
1003                                 err(1, "syntax error in %s's value", (f)); \
1004                         v = newval; \
1005                 } \
1006         } while (0)
1007
1008                 SETFLAG("disabled", ND6_IFF_IFDISABLED);
1009                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
1010 #ifdef ND6_IFF_ACCEPT_RTADV
1011                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
1012 #endif
1013 #ifdef ND6_IFF_AUTO_LINKLOCAL
1014                 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
1015 #endif
1016 #ifdef ND6_IFF_NO_PREFER_IFACE
1017                 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
1018 #endif
1019                 SETVALUE("basereachable", ND.basereachable);
1020                 SETVALUE("retrans", ND.retrans);
1021                 SETVALUE("curhlim", ND.chlim);
1022
1023                 ND.flags = newflags;
1024                 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
1025                         err(1, "ioctl(SIOCSIFINFO_IN6)");
1026                         /* NOTREACHED */
1027                 }
1028 #undef SETFLAG
1029 #undef SETVALUE
1030         }
1031
1032         if (!ND.initialized) {
1033                 errx(1, "%s: not initialized yet", ifname);
1034                 /* NOTREACHED */
1035         }
1036
1037         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1038                 err(1, "ioctl(SIOCGIFINFO_IN6)");
1039                 /* NOTREACHED */
1040         }
1041         printf("linkmtu=%d", ND.linkmtu);
1042         printf(", maxmtu=%d", ND.maxmtu);
1043         printf(", curhlim=%d", ND.chlim);
1044         printf(", basereachable=%ds%dms",
1045             ND.basereachable / 1000, ND.basereachable % 1000);
1046         printf(", reachable=%ds", ND.reachable);
1047         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1048 #ifdef IPV6CTL_USETEMPADDR
1049         memset(nullbuf, 0, sizeof(nullbuf));
1050         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1051                 int j;
1052                 u_int8_t *rbuf;
1053
1054                 for (i = 0; i < 3; i++) {
1055                         switch (i) {
1056                         case 0:
1057                                 printf("\nRandom seed(0): ");
1058                                 rbuf = ND.randomseed0;
1059                                 break;
1060                         case 1:
1061                                 printf("\nRandom seed(1): ");
1062                                 rbuf = ND.randomseed1;
1063                                 break;
1064                         case 2:
1065                                 printf("\nRandom ID:      ");
1066                                 rbuf = ND.randomid;
1067                                 break;
1068                         default:
1069                                 errx(1, "impossible case for tempaddr display");
1070                         }
1071                         for (j = 0; j < 8; j++)
1072                                 printf("%02x", rbuf[j]);
1073                 }
1074         }
1075 #endif
1076         if (ND.flags) {
1077                 printf("\nFlags: ");
1078 #ifdef ND6_IFF_IFDISABLED
1079                 if ((ND.flags & ND6_IFF_IFDISABLED))
1080                         printf("disabled ");
1081 #endif
1082                 if ((ND.flags & ND6_IFF_PERFORMNUD))
1083                         printf("nud ");
1084 #ifdef ND6_IFF_ACCEPT_RTADV
1085                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1086                         printf("accept_rtadv ");
1087 #endif
1088 #ifdef ND6_IFF_AUTO_LINKLOCAL
1089                 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1090                         printf("auto_linklocal ");
1091 #endif
1092 #ifdef ND6_IFF_NO_PREFER_IFACE
1093                 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1094                         printf("no_prefer_iface ");
1095 #endif
1096         }
1097         putc('\n', stdout);
1098 #undef ND
1099
1100         close(s);
1101 }
1102
1103 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
1104 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
1105 #endif
1106
1107 void
1108 rtrlist()
1109 {
1110 #ifdef ICMPV6CTL_ND6_DRLIST
1111         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1112         char *buf;
1113         struct in6_defrouter *p, *ep;
1114         size_t l;
1115         struct timeval time;
1116
1117         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1118                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1119                 /*NOTREACHED*/
1120         }
1121         if (l == 0)
1122                 return;
1123         buf = malloc(l);
1124         if (!buf) {
1125                 err(1, "malloc");
1126                 /*NOTREACHED*/
1127         }
1128         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1129                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1130                 /*NOTREACHED*/
1131         }
1132
1133         ep = (struct in6_defrouter *)(buf + l);
1134         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1135                 int rtpref;
1136
1137                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1138                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1139                     (nflag ? NI_NUMERICHOST : 0)) != 0)
1140                         strlcpy(host_buf, "?", sizeof(host_buf));
1141
1142                 printf("%s if=%s", host_buf,
1143                     if_indextoname(p->if_index, ifix_buf));
1144                 printf(", flags=%s%s",
1145                     p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1146                     p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1147                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1148                 printf(", pref=%s", rtpref_str[rtpref]);
1149
1150                 gettimeofday(&time, 0);
1151                 if (p->expire == 0)
1152                         printf(", expire=Never\n");
1153                 else
1154                         printf(", expire=%s\n",
1155                             sec2str(p->expire - time.tv_sec));
1156         }
1157         free(buf);
1158 #else
1159         struct in6_drlist dr;
1160         int s, i;
1161         struct timeval time;
1162
1163         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1164                 err(1, "socket");
1165                 /* NOTREACHED */
1166         }
1167         bzero(&dr, sizeof(dr));
1168         strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1169         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1170                 err(1, "ioctl(SIOCGDRLST_IN6)");
1171                 /* NOTREACHED */
1172         }
1173 #define DR dr.defrouter[i]
1174         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1175                 struct sockaddr_in6 sin6;
1176
1177                 bzero(&sin6, sizeof(sin6));
1178                 sin6.sin6_family = AF_INET6;
1179                 sin6.sin6_len = sizeof(sin6);
1180                 sin6.sin6_addr = DR.rtaddr;
1181                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1182                     sizeof(host_buf), NULL, 0,
1183                     (nflag ? NI_NUMERICHOST : 0));
1184
1185                 printf("%s if=%s", host_buf,
1186                     if_indextoname(DR.if_index, ifix_buf));
1187                 printf(", flags=%s%s",
1188                     DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1189                     DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1190                 gettimeofday(&time, 0);
1191                 if (DR.expire == 0)
1192                         printf(", expire=Never\n");
1193                 else
1194                         printf(", expire=%s\n",
1195                             sec2str(DR.expire - time.tv_sec));
1196         }
1197 #undef DR
1198         close(s);
1199 #endif
1200 }
1201
1202 void
1203 plist()
1204 {
1205 #ifdef ICMPV6CTL_ND6_PRLIST
1206         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1207         char *buf;
1208         struct in6_prefix *p, *ep, *n;
1209         struct sockaddr_in6 *advrtr;
1210         size_t l;
1211         struct timeval time;
1212         const int niflags = NI_NUMERICHOST;
1213         int ninflags = nflag ? NI_NUMERICHOST : 0;
1214         char namebuf[NI_MAXHOST];
1215
1216         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1217                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1218                 /*NOTREACHED*/
1219         }
1220         buf = malloc(l);
1221         if (!buf) {
1222                 err(1, "malloc");
1223                 /*NOTREACHED*/
1224         }
1225         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1226                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1227                 /*NOTREACHED*/
1228         }
1229
1230         ep = (struct in6_prefix *)(buf + l);
1231         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1232                 advrtr = (struct sockaddr_in6 *)(p + 1);
1233                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1234
1235                 if (getnameinfo((struct sockaddr *)&p->prefix,
1236                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1237                     NULL, 0, niflags) != 0)
1238                         strlcpy(namebuf, "?", sizeof(namebuf));
1239                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1240                     if_indextoname(p->if_index, ifix_buf));
1241
1242                 gettimeofday(&time, 0);
1243                 /*
1244                  * meaning of fields, especially flags, is very different
1245                  * by origin.  notify the difference to the users.
1246                  */
1247                 printf("flags=%s%s%s%s%s",
1248                     p->raflags.onlink ? "L" : "",
1249                     p->raflags.autonomous ? "A" : "",
1250                     (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1251                     (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1252 #ifdef NDPRF_HOME
1253                     (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1254 #else
1255                     ""
1256 #endif
1257                     );
1258                 if (p->vltime == ND6_INFINITE_LIFETIME)
1259                         printf(" vltime=infinity");
1260                 else
1261                         printf(" vltime=%lu", (unsigned long)p->vltime);
1262                 if (p->pltime == ND6_INFINITE_LIFETIME)
1263                         printf(", pltime=infinity");
1264                 else
1265                         printf(", pltime=%lu", (unsigned long)p->pltime);
1266                 if (p->expire == 0)
1267                         printf(", expire=Never");
1268                 else if (p->expire >= time.tv_sec)
1269                         printf(", expire=%s",
1270                             sec2str(p->expire - time.tv_sec));
1271                 else
1272                         printf(", expired");
1273                 printf(", ref=%d", p->refcnt);
1274                 printf("\n");
1275                 /*
1276                  * "advertising router" list is meaningful only if the prefix
1277                  * information is from RA.
1278                  */
1279                 if (p->advrtrs) {
1280                         int j;
1281                         struct sockaddr_in6 *sin6;
1282
1283                         sin6 = advrtr;
1284                         printf("  advertised by\n");
1285                         for (j = 0; j < p->advrtrs; j++) {
1286                                 struct in6_nbrinfo *nbi;
1287
1288                                 if (getnameinfo((struct sockaddr *)sin6,
1289                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1290                                     NULL, 0, ninflags) != 0)
1291                                         strlcpy(namebuf, "?", sizeof(namebuf));
1292                                 printf("    %s", namebuf);
1293
1294                                 nbi = getnbrinfo(&sin6->sin6_addr,
1295                                     p->if_index, 0);
1296                                 if (nbi) {
1297                                         switch (nbi->state) {
1298                                         case ND6_LLINFO_REACHABLE:
1299                                         case ND6_LLINFO_STALE:
1300                                         case ND6_LLINFO_DELAY:
1301                                         case ND6_LLINFO_PROBE:
1302                                                 printf(" (reachable)\n");
1303                                                 break;
1304                                         default:
1305                                                 printf(" (unreachable)\n");
1306                                         }
1307                                 } else
1308                                         printf(" (no neighbor state)\n");
1309                                 sin6++;
1310                         }
1311                 } else
1312                         printf("  No advertising router\n");
1313         }
1314         free(buf);
1315 #else
1316         struct in6_prlist pr;
1317         int s, i;
1318         struct timeval time;
1319
1320         gettimeofday(&time, 0);
1321
1322         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1323                 err(1, "socket");
1324                 /* NOTREACHED */
1325         }
1326         bzero(&pr, sizeof(pr));
1327         strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1328         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1329                 err(1, "ioctl(SIOCGPRLST_IN6)");
1330                 /* NOTREACHED */
1331         }
1332 #define PR pr.prefix[i]
1333         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1334                 struct sockaddr_in6 p6;
1335                 char namebuf[NI_MAXHOST];
1336                 int niflags;
1337
1338 #ifdef NDPRF_ONLINK
1339                 p6 = PR.prefix;
1340 #else
1341                 memset(&p6, 0, sizeof(p6));
1342                 p6.sin6_family = AF_INET6;
1343                 p6.sin6_len = sizeof(p6);
1344                 p6.sin6_addr = PR.prefix;
1345 #endif
1346
1347                 /*
1348                  * copy link index to sin6_scope_id field.
1349                  * XXX: KAME specific.
1350                  */
1351                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1352                         u_int16_t linkid;
1353
1354                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1355                             sizeof(linkid));
1356                         linkid = ntohs(linkid);
1357                         p6.sin6_scope_id = linkid;
1358                         p6.sin6_addr.s6_addr[2] = 0;
1359                         p6.sin6_addr.s6_addr[3] = 0;
1360                 }
1361
1362                 niflags = NI_NUMERICHOST;
1363                 if (getnameinfo((struct sockaddr *)&p6,
1364                     sizeof(p6), namebuf, sizeof(namebuf),
1365                     NULL, 0, niflags)) {
1366                         warnx("getnameinfo failed");
1367                         continue;
1368                 }
1369                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1370                     if_indextoname(PR.if_index, ifix_buf));
1371
1372                 gettimeofday(&time, 0);
1373                 /*
1374                  * meaning of fields, especially flags, is very different
1375                  * by origin.  notify the difference to the users.
1376                  */
1377 #if 0
1378                 printf("  %s",
1379                     PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1380 #endif
1381 #ifdef NDPRF_ONLINK
1382                 printf("flags=%s%s%s%s%s",
1383                     PR.raflags.onlink ? "L" : "",
1384                     PR.raflags.autonomous ? "A" : "",
1385                     (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1386                     (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1387 #ifdef NDPRF_HOME
1388                     (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1389 #else
1390                     ""
1391 #endif
1392                     );
1393 #else
1394                 printf("flags=%s%s",
1395                     PR.raflags.onlink ? "L" : "",
1396                     PR.raflags.autonomous ? "A" : "");
1397 #endif
1398                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1399                         printf(" vltime=infinity");
1400                 else
1401                         printf(" vltime=%lu", PR.vltime);
1402                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1403                         printf(", pltime=infinity");
1404                 else
1405                         printf(", pltime=%lu", PR.pltime);
1406                 if (PR.expire == 0)
1407                         printf(", expire=Never");
1408                 else if (PR.expire >= time.tv_sec)
1409                         printf(", expire=%s",
1410                             sec2str(PR.expire - time.tv_sec));
1411                 else
1412                         printf(", expired");
1413 #ifdef NDPRF_ONLINK
1414                 printf(", ref=%d", PR.refcnt);
1415 #endif
1416 #if 0
1417                 switch (PR.origin) {
1418                 case PR_ORIG_RA:
1419                         printf(", origin=RA");
1420                         break;
1421                 case PR_ORIG_RR:
1422                         printf(", origin=RR");
1423                         break;
1424                 case PR_ORIG_STATIC:
1425                         printf(", origin=static");
1426                         break;
1427                 case PR_ORIG_KERNEL:
1428                         printf(", origin=kernel");
1429                         break;
1430                 default:
1431                         printf(", origin=?");
1432                         break;
1433                 }
1434 #endif
1435                 printf("\n");
1436                 /*
1437                  * "advertising router" list is meaningful only if the prefix
1438                  * information is from RA.
1439                  */
1440                 if (0 &&        /* prefix origin is almost obsolted */
1441                     PR.origin != PR_ORIG_RA)
1442                         ;
1443                 else if (PR.advrtrs) {
1444                         int j;
1445                         printf("  advertised by\n");
1446                         for (j = 0; j < PR.advrtrs; j++) {
1447                                 struct sockaddr_in6 sin6;
1448                                 struct in6_nbrinfo *nbi;
1449
1450                                 bzero(&sin6, sizeof(sin6));
1451                                 sin6.sin6_family = AF_INET6;
1452                                 sin6.sin6_len = sizeof(sin6);
1453                                 sin6.sin6_addr = PR.advrtr[j];
1454                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1455                                 getnameinfo((struct sockaddr *)&sin6,
1456                                     sin6.sin6_len, host_buf,
1457                                     sizeof(host_buf), NULL, 0,
1458                                     (nflag ? NI_NUMERICHOST : 0));
1459                                 printf("    %s", host_buf);
1460
1461                                 nbi = getnbrinfo(&sin6.sin6_addr,
1462                                     PR.if_index, 0);
1463                                 if (nbi) {
1464                                         switch (nbi->state) {
1465                                         case ND6_LLINFO_REACHABLE:
1466                                         case ND6_LLINFO_STALE:
1467                                         case ND6_LLINFO_DELAY:
1468                                         case ND6_LLINFO_PROBE:
1469                                                  printf(" (reachable)\n");
1470                                                  break;
1471                                         default:
1472                                                  printf(" (unreachable)\n");
1473                                         }
1474                                 } else
1475                                         printf(" (no neighbor state)\n");
1476                         }
1477                         if (PR.advrtrs > DRLSTSIZ)
1478                                 printf("    and %d routers\n",
1479                                     PR.advrtrs - DRLSTSIZ);
1480                 } else
1481                         printf("  No advertising router\n");
1482         }
1483 #undef PR
1484         close(s);
1485 #endif
1486 }
1487
1488 void
1489 pfx_flush()
1490 {
1491         char dummyif[IFNAMSIZ+8];
1492         int s;
1493
1494         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1495                 err(1, "socket");
1496         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1497         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1498                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1499 }
1500
1501 void
1502 rtr_flush()
1503 {
1504         char dummyif[IFNAMSIZ+8];
1505         int s;
1506
1507         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1508                 err(1, "socket");
1509         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1510         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1511                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1512
1513         close(s);
1514 }
1515
1516 void
1517 harmonize_rtr()
1518 {
1519         char dummyif[IFNAMSIZ+8];
1520         int s;
1521
1522         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1523                 err(1, "socket");
1524         strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1525         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1526                 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1527
1528         close(s);
1529 }
1530
1531 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1532 static void
1533 setdefif(ifname)
1534         char *ifname;
1535 {
1536         struct in6_ndifreq ndifreq;
1537         unsigned int ifindex;
1538
1539         if (strcasecmp(ifname, "delete") == 0)
1540                 ifindex = 0;
1541         else {
1542                 if ((ifindex = if_nametoindex(ifname)) == 0)
1543                         err(1, "failed to resolve i/f index for %s", ifname);
1544         }
1545
1546         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1547                 err(1, "socket");
1548
1549         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1550         ndifreq.ifindex = ifindex;
1551
1552         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1553                 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1554
1555         close(s);
1556 }
1557
1558 static void
1559 getdefif()
1560 {
1561         struct in6_ndifreq ndifreq;
1562         char ifname[IFNAMSIZ+8];
1563
1564         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1565                 err(1, "socket");
1566
1567         memset(&ndifreq, 0, sizeof(ndifreq));
1568         strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1569
1570         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1571                 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1572
1573         if (ndifreq.ifindex == 0)
1574                 printf("No default interface.\n");
1575         else {
1576                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1577                         err(1, "failed to resolve ifname for index %lu",
1578                             ndifreq.ifindex);
1579                 printf("ND default interface = %s\n", ifname);
1580         }
1581
1582         close(s);
1583 }
1584 #endif
1585
1586 static char *
1587 sec2str(total)
1588         time_t total;
1589 {
1590         static char result[256];
1591         int days, hours, mins, secs;
1592         int first = 1;
1593         char *p = result;
1594         char *ep = &result[sizeof(result)];
1595         int n;
1596
1597         days = total / 3600 / 24;
1598         hours = (total / 3600) % 24;
1599         mins = (total / 60) % 60;
1600         secs = total % 60;
1601
1602         if (days) {
1603                 first = 0;
1604                 n = snprintf(p, ep - p, "%dd", days);
1605                 if (n < 0 || n >= ep - p)
1606                         return "?";
1607                 p += n;
1608         }
1609         if (!first || hours) {
1610                 first = 0;
1611                 n = snprintf(p, ep - p, "%dh", hours);
1612                 if (n < 0 || n >= ep - p)
1613                         return "?";
1614                 p += n;
1615         }
1616         if (!first || mins) {
1617                 first = 0;
1618                 n = snprintf(p, ep - p, "%dm", mins);
1619                 if (n < 0 || n >= ep - p)
1620                         return "?";
1621                 p += n;
1622         }
1623         snprintf(p, ep - p, "%ds", secs);
1624
1625         return(result);
1626 }
1627
1628 /*
1629  * Print the timestamp
1630  * from tcpdump/util.c
1631  */
1632 static void
1633 ts_print(tvp)
1634         const struct timeval *tvp;
1635 {
1636         int s;
1637
1638         /* Default */
1639         s = (tvp->tv_sec + thiszone) % 86400;
1640         (void)printf("%02d:%02d:%02d.%06u ",
1641             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1642 }
1643
1644 #undef NEXTADDR