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