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