usr.sbin/ndp/ndp.c

   1 /*      $FreeBSD: src/usr.sbin/ndp/ndp.c,v 1.2.2.6 2003/08/12 16:27:57 ume Exp $        */
   2 /*      $DragonFly: src/usr.sbin/ndp/ndp.c,v 1.6 2004/12/30 02:35:24 hsu Exp $  */
   3 /*      $KAME: ndp.c,v 1.65 2001/05/08 04:36:34 itojun Exp $    */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33 /*
  34  * Copyright (c) 1984, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * This code is derived from software contributed to Berkeley by
  38  * Sun Microsystems, Inc.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 3. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  */
  64
  65 /*
  66  * Based on:
  67  * "@(#) Copyright (c) 1984, 1993\n\
  68  *      The Regents of the University of California.  All rights reserved.\n";
  69  *
  70  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  71  */
  72
  73 /*
  74  * ndp - display, set, delete and flush neighbor cache
  75  */
  76
  77
  78 #include <sys/param.h>
  79 #include <sys/file.h>
  80 #include <sys/ioctl.h>
  81 #include <sys/socket.h>
  82 #include <sys/sysctl.h>
  83 #include <sys/time.h>
  84 #include <sys/queue.h>
  85
  86 #include <net/if.h>
  87 #include <net/if_var.h>
  88 #include <net/if_dl.h>
  89 #include <net/if_types.h>
  90 #include <net/route.h>
  91
  92 #include <netinet/in.h>
  93 #include <netinet/if_ether.h>
  94
  95 #include <netinet/icmp6.h>
  96 #include <netinet6/in6_var.h>
  97 #include <netinet6/nd6.h>
  98
  99 #include <arpa/inet.h>
 100
 101 #include <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 #ifndef NI_WITHSCOPEID
 114 #define NI_WITHSCOPEID  0
 115 #endif
 116
 117 /* packing rule for routing socket */
 118 #define ROUNDUP(a) \
 119         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 120 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 121
 122 static int pid;
 123 static int cflag;
 124 static int nflag;
 125 static int tflag;
 126 static int32_t thiszone;        /* time difference with gmt */
 127 static int s = -1;
 128 static int repeat = 0;
 129
 130 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 131 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 132 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 133
 134 int main(int, char **);
 135 int file(char *);
 136 void getsocket(void);
 137 int set(int, char **);
 138 void get(char *);
 139 int delete(char *);
 140 void dump(struct in6_addr *);
 141 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *addr,
 142                                            int ifindex, int);
 143 static char *ether_str(struct sockaddr_dl *);
 144 int ndp_ether_aton(char *, u_char *);
 145 void usage(void);
 146 int rtmsg(int);
 147 void ifinfo(int, char **);
 148 void rtrlist(void);
 149 void plist(void);
 150 void pfx_flush(void);
 151 void rtrlist(void);
 152 void rtr_flush(void);
 153 void harmonize_rtr(void);
 154 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 155 static void getdefif(void);
 156 static void setdefif(char *);
 157 #endif
 158 static char *sec2str(time_t t);
 159 static char *ether_str(struct sockaddr_dl *sdl);
 160 static void ts_print(const struct timeval *);
 161
 162 static char *rtpref_str[] = {
 163         "medium",               /* 00 */
 164         "high",                 /* 01 */
 165         "rsv",                  /* 10 */
 166         "low"                   /* 11 */
 167 };
 168
 169 int
 170 main(int argc, char **argv)
 171 {
 172         int ch;
 173         int aflag = 0, dflag = 0, sflag = 0, Hflag = 0,
 174                 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
 175
 176         pid = getpid();
 177         thiszone = gmt2local(0);
 178         while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != -1)
 179                 switch ((char)ch) {
 180                 case 'a':
 181                         aflag = 1;
 182                         break;
 183                 case 'c':
 184                         cflag = 1;
 185                         break;
 186                 case 'd':
 187                         dflag = 1;
 188                         break;
 189                 case 'I':
 190 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 191                         if (argc > 2)
 192                                 setdefif(argv[2]);
 193                         getdefif(); /* always call it to print the result */
 194                         exit(0);
 195 #else
 196                         errx(1, "not supported yet");
 197                         /*NOTREACHED*/
 198 #endif
 199                 case 'i' :
 200                         argc -= optind;
 201                         argv += optind;
 202                         if (argc < 1)
 203                                 usage();
 204                         ifinfo(argc, argv);
 205                         exit(0);
 206                 case 'n':
 207                         nflag = 1;
 208                         continue;
 209                 case 'p':
 210                         pflag = 1;
 211                         break;
 212                 case 'f' :
 213                         if (argc != 3)
 214                                 usage();
 215                         file(argv[2]);
 216                         exit(0);
 217                 case 'l' :
 218                         /* obsolete, ignored */
 219                         break;
 220                 case 'r' :
 221                         rflag = 1;
 222                         break;
 223                 case 's':
 224                         sflag = 1;
 225                         break;
 226                 case 't':
 227                         tflag = 1;
 228                         break;
 229                 case 'A':
 230                         aflag = 1;
 231                         repeat = atoi(optarg);
 232                         if (repeat < 0)
 233                                 usage();
 234                         break;
 235                 case 'H' :
 236                         Hflag = 1;
 237                         break;
 238                 case 'P':
 239                         Pflag = 1;
 240                         break;
 241                 case 'R':
 242                         Rflag = 1;
 243                         break;
 244                 default:
 245                         usage();
 246                 }
 247
 248         argc -= optind;
 249         argv += optind;
 250
 251         if (aflag || cflag) {
 252                 dump(0);
 253                 exit(0);
 254         }
 255         if (dflag) {
 256                 if (argc != 1)
 257                         usage();
 258                 delete(argv[0]);
 259                 exit(0);
 260         }
 261         if (pflag) {
 262                 plist();
 263                 exit(0);
 264         }
 265         if (rflag) {
 266                 rtrlist();
 267                 exit(0);
 268         }
 269         if (sflag) {
 270                 if (argc < 2 || argc > 4)
 271                         usage();
 272                 exit(set(argc, argv) ? 1 : 0);
 273         }
 274         if (Hflag) {
 275                 harmonize_rtr();
 276                 exit(0);
 277         }
 278         if (Pflag) {
 279                 pfx_flush();
 280                 exit(0);
 281         }
 282         if (Rflag) {
 283                 rtr_flush();
 284                 exit(0);
 285         }
 286
 287         if (argc != 1)
 288                 usage();
 289         get(argv[0]);
 290         exit(0);
 291 }
 292
 293 /*
 294  * Process a file to set standard ndp entries
 295  */
 296 int
 297 file(char *name)
 298 {
 299         FILE *fp;
 300         int i, retval;
 301         char line[100], arg[5][50], *args[5];
 302
 303         if ((fp = fopen(name, "r")) == NULL) {
 304                 fprintf(stderr, "ndp: cannot open %s\n", name);
 305                 exit(1);
 306         }
 307         args[0] = &arg[0][0];
 308         args[1] = &arg[1][0];
 309         args[2] = &arg[2][0];
 310         args[3] = &arg[3][0];
 311         args[4] = &arg[4][0];
 312         retval = 0;
 313         while(fgets(line, 100, fp) != NULL) {
 314                 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
 315                     arg[3], arg[4]);
 316                 if (i < 2) {
 317                         fprintf(stderr, "ndp: bad line: %s\n", line);
 318                         retval = 1;
 319                         continue;
 320                 }
 321                 if (set(i, args))
 322                         retval = 1;
 323         }
 324         fclose(fp);
 325         return (retval);
 326 }
 327
 328 void
 329 getsocket(void)
 330 {
 331         if (s < 0) {
 332                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 333                 if (s < 0) {
 334                         perror("ndp: socket");
 335                         exit(1);
 336                 }
 337         }
 338 }
 339
 340 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 341 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 342 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 343 int     flags, found_entry;
 344 time_t  expire_time;
 345 struct  {
 346         struct  rt_msghdr m_rtm;
 347         char    m_space[512];
 348 }       m_rtmsg;
 349
 350 /*
 351  * Set an individual neighbor cache entry
 352  */
 353 int
 354 set(int argc, char **argv)
 355 {
 356         struct sockaddr_in6 *sin = &sin_m;
 357         struct sockaddr_dl *sdl;
 358         struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 359         struct addrinfo hints, *res;
 360         int gai_error;
 361         u_char *ea;
 362         char *host = argv[0], *eaddr = argv[1];
 363
 364         getsocket();
 365         argc -= 2;
 366         argv += 2;
 367         sdl_m = blank_sdl;
 368         sin_m = blank_sin;
 369
 370         bzero(&hints, sizeof(hints));
 371         hints.ai_family = AF_INET6;
 372         gai_error = getaddrinfo(host, NULL, &hints, &res);
 373         if (gai_error) {
 374                 fprintf(stderr, "ndp: %s: %s\n", host,
 375                         gai_strerror(gai_error));
 376                 return 1;
 377         }
 378         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 379 #ifdef __KAME__
 380         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 381                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 382                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 383         }
 384 #endif
 385         ea = (u_char *)LLADDR(&sdl_m);
 386         if (ndp_ether_aton(eaddr, ea) == 0)
 387                 sdl_m.sdl_alen = 6;
 388         flags = 0;
 389         expire_time = 0;
 390         while (argc-- > 0) {
 391                 if (strncmp(argv[0], "temp", 4) == 0) {
 392                         struct timespec sp;
 393
 394                         clock_gettime(CLOCK_MONOTONIC, &sp);
 395                         expire_time = sp.tv_sec + 20 * 60;
 396                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 397                         flags |= RTF_ANNOUNCE;
 398                 argv++;
 399         }
 400         if (rtmsg(RTM_GET) < 0) {
 401                 perror(host);
 402                 return (1);
 403         }
 404         sin = (struct sockaddr_in6 *)(rtm + 1);
 405         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 406         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 407                 if (sdl->sdl_family == AF_LINK &&
 408                     (rtm->rtm_flags & RTF_LLINFO) &&
 409                     !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
 410                 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 411                 case IFT_ISO88024: case IFT_ISO88025:
 412                         goto overwrite;
 413                 }
 414                 /*
 415                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 416                  */
 417                 fprintf(stderr, "set: cannot configure a new entry\n");
 418                 return 1;
 419         }
 420
 421 overwrite:
 422         if (sdl->sdl_family != AF_LINK) {
 423                 printf("cannot intuit interface index and type for %s\n", host);
 424                 return (1);
 425         }
 426         sdl_m.sdl_type = sdl->sdl_type;
 427         sdl_m.sdl_index = sdl->sdl_index;
 428         return (rtmsg(RTM_ADD));
 429 }
 430
 431 /*
 432  * Display an individual neighbor cache entry
 433  */
 434 void
 435 get(char *host)
 436 {
 437         struct sockaddr_in6 *sin = &sin_m;
 438         struct addrinfo hints, *res;
 439         int gai_error;
 440
 441         sin_m = blank_sin;
 442         bzero(&hints, sizeof(hints));
 443         hints.ai_family = AF_INET6;
 444         gai_error = getaddrinfo(host, NULL, &hints, &res);
 445         if (gai_error) {
 446                 fprintf(stderr, "ndp: %s: %s\n", host,
 447                         gai_strerror(gai_error));
 448                 return;
 449         }
 450         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 451 #ifdef __KAME__
 452         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 453                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 454                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 455         }
 456 #endif
 457         dump(&sin->sin6_addr);
 458         if (found_entry == 0) {
 459                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 460                             sizeof(host_buf), NULL ,0,
 461                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 462                 printf("%s (%s) -- no entry\n", host, host_buf);
 463                 exit(1);
 464         }
 465 }
 466
 467 /*
 468  * Delete a neighbor cache entry
 469  */
 470 int
 471 delete(char *host)
 472 {
 473         struct sockaddr_in6 *sin = &sin_m;
 474         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 475         struct sockaddr_dl *sdl;
 476         struct addrinfo hints, *res;
 477         int gai_error;
 478
 479         getsocket();
 480         sin_m = blank_sin;
 481
 482         bzero(&hints, sizeof(hints));
 483         hints.ai_family = AF_INET6;
 484         gai_error = getaddrinfo(host, NULL, &hints, &res);
 485         if (gai_error) {
 486                 fprintf(stderr, "ndp: %s: %s\n", host,
 487                         gai_strerror(gai_error));
 488                 return 1;
 489         }
 490         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 491 #ifdef __KAME__
 492         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 493                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 494                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 495         }
 496 #endif
 497         if (rtmsg(RTM_GET) < 0) {
 498                 perror(host);
 499                 return (1);
 500         }
 501         sin = (struct sockaddr_in6 *)(rtm + 1);
 502         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 503         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 504                 if (sdl->sdl_family == AF_LINK &&
 505                     (rtm->rtm_flags & RTF_LLINFO) &&
 506                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 507                         goto delete;
 508                 }
 509                 /*
 510                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 511                  */
 512                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 513                 return 1;
 514         }
 515
 516 delete:
 517         if (sdl->sdl_family != AF_LINK) {
 518                 printf("cannot locate %s\n", host);
 519                 return (1);
 520         }
 521         if (rtmsg(RTM_DELETE) == 0) {
 522                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 523
 524 #ifdef __KAME__
 525                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 526                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 527                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 528                 }
 529 #endif
 530                 getnameinfo((struct sockaddr *)&s6,
 531                             s6.sin6_len, host_buf,
 532                             sizeof(host_buf), NULL, 0,
 533                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 534                 printf("%s (%s) deleted\n", host, host_buf);
 535         }
 536
 537         return 0;
 538 }
 539
 540 #define W_ADDR  31
 541 #define W_LL    17
 542 #define W_IF    6
 543
 544 /*
 545  * Dump the entire neighbor cache
 546  */
 547 void
 548 dump(struct in6_addr *addr)
 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 time;
 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 %2s %4s %4s\n",
 568                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 569                     W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs");
 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         mib[5] = RTF_LLINFO;
 578         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 579                 err(1, "sysctl(PF_ROUTE estimate)");
 580         if (needed > 0) {
 581                 if ((buf = malloc(needed)) == NULL)
 582                         errx(1, "malloc");
 583                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 584                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 585                 lim = buf + needed;
 586         } else
 587                 buf = lim = NULL;
 588
 589         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 590                 int isrouter = 0, prbs = 0;
 591
 592                 rtm = (struct rt_msghdr *)next;
 593                 sin = (struct sockaddr_in6 *)(rtm + 1);
 594                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 595
 596                 /*
 597                  * Some OSes can produce a route that has the LINK flag but
 598                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 599                  * and BSD/OS, where xx is not the interface identifier on
 600                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 601                  * so we skip them.
 602                  * XXX: such routes should have the GATEWAY flag, not the
 603                  * LINK flag.  However, there are rotten routing software
 604                  * that advertises all routes that have the GATEWAY flag.
 605                  * Thus, KAME kernel intentionally does not set the LINK flag.
 606                  * What is to be fixed is not ndp, but such routing software
 607                  * (and the kernel workaround)...
 608                  */
 609                 if (sdl->sdl_family != AF_LINK)
 610                         continue;
 611
 612                 if (addr) {
 613                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 614                                 continue;
 615                         found_entry = 1;
 616                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 617                         continue;
 618                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 619                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 620                         /* XXX: should scope id be filled in the kernel? */
 621                         if (sin->sin6_scope_id == 0)
 622                                 sin->sin6_scope_id = sdl->sdl_index;
 623 #ifdef __KAME__
 624                         /* KAME specific hack; removed the embedded id */
 625                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 626 #endif
 627                 }
 628                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 629                             sizeof(host_buf), NULL, 0,
 630                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 631                 if (cflag == 1) {
 632 #ifdef RTF_WASCLONED
 633                         if (rtm->rtm_flags & RTF_WASCLONED)
 634                                 delete(host_buf);
 635 #else
 636                         delete(host_buf);
 637 #endif
 638                         continue;
 639                 }
 640                 gettimeofday(&time, 0);
 641                 if (tflag)
 642                         ts_print(&time);
 643
 644                 addrwidth = strlen(host_buf);
 645                 if (addrwidth < W_ADDR)
 646                         addrwidth = W_ADDR;
 647                 llwidth = strlen(ether_str(sdl));
 648                 if (W_ADDR + W_LL - addrwidth > llwidth)
 649                         llwidth = W_ADDR + W_LL - addrwidth;
 650                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 651                 if (!ifname)
 652                         ifname = "?";
 653                 ifwidth = strlen(ifname);
 654                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 655                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 656
 657                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 658                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 659
 660                 /* Print neighbor discovery specific informations */
 661                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 662                 if (nbi) {
 663                         if (nbi->expire > time.tv_sec) {
 664                                 printf(" %-9.9s",
 665                                        sec2str(nbi->expire - time.tv_sec));
 666                         } else if (nbi->expire == 0)
 667                                 printf(" %-9.9s", "permanent");
 668                         else
 669                                 printf(" %-9.9s", "expired");
 670
 671                         switch(nbi->state) {
 672                          case ND6_LLINFO_NOSTATE:
 673                                  printf(" N");
 674                                  break;
 675 #ifdef ND6_LLINFO_WAITDELETE
 676                          case ND6_LLINFO_WAITDELETE:
 677                                  printf(" W");
 678                                  break;
 679 #endif
 680                          case ND6_LLINFO_INCOMPLETE:
 681                                  printf(" I");
 682                                  break;
 683                          case ND6_LLINFO_REACHABLE:
 684                                  printf(" R");
 685                                  break;
 686                          case ND6_LLINFO_STALE:
 687                                  printf(" S");
 688                                  break;
 689                          case ND6_LLINFO_DELAY:
 690                                  printf(" D");
 691                                  break;
 692                          case ND6_LLINFO_PROBE:
 693                                  printf(" P");
 694                                  break;
 695                          default:
 696                                  printf(" ?");
 697                                  break;
 698                         }
 699
 700                         isrouter = nbi->isrouter;
 701                         prbs = nbi->asked;
 702                 } else {
 703                         warnx("failed to get neighbor information");
 704                         printf("  ");
 705                 }
 706                 putchar(' ');
 707
 708                 /*
 709                  * other flags. R: router, P: proxy, W: ??
 710                  */
 711                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 712                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 713                                 isrouter ? "R" : "",
 714                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 715                 } else {
 716                         sin = (struct sockaddr_in6 *)
 717                                 (sdl->sdl_len + (char *)sdl);
 718                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 719                                 isrouter ? "R" : "",
 720                                 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr)
 721                                         ? "P" : "",
 722                                 (sin->sin6_len != sizeof(struct sockaddr_in6))
 723                                         ? "W" : "",
 724                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 725                 }
 726                 printf(" %-4.4s", flgbuf);
 727
 728                 if (prbs)
 729                         printf(" %4d", prbs);
 730
 731                 printf("\n");
 732         }
 733         if (buf != NULL)
 734                 free(buf);
 735
 736         if (repeat) {
 737                 printf("\n");
 738                 sleep(repeat);
 739                 goto again;
 740         }
 741 }
 742
 743 static struct in6_nbrinfo *
 744 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
 745 {
 746         static struct in6_nbrinfo nbi;
 747         int s;
 748
 749         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 750                 err(1, "socket");
 751
 752         bzero(&nbi, sizeof(nbi));
 753         if_indextoname(ifindex, nbi.ifname);
 754         nbi.addr = *addr;
 755         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 756                 if (warning)
 757                         warn("ioctl(SIOCGNBRINFO_IN6)");
 758                 close(s);
 759                 return(NULL);
 760         }
 761
 762         close(s);
 763         return(&nbi);
 764 }
 765
 766 static char *
 767 ether_str(struct sockaddr_dl *sdl)
 768 {
 769         static char ebuf[32];
 770         u_char *cp;
 771
 772         if (sdl->sdl_alen) {
 773                 cp = (u_char *)LLADDR(sdl);
 774                 sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
 775                         cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 776         } else {
 777                 sprintf(ebuf, "(incomplete)");
 778         }
 779
 780         return(ebuf);
 781 }
 782
 783 int
 784 ndp_ether_aton(char *a, u_char *n)
 785 {
 786         int i, o[6];
 787
 788         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 789                                            &o[3], &o[4], &o[5]);
 790         if (i != 6) {
 791                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 792                 return (1);
 793         }
 794         for (i=0; i<6; i++)
 795                 n[i] = o[i];
 796         return (0);
 797 }
 798
 799 void
 800 usage(void)
 801 {
 802         printf("usage: ndp hostname\n");
 803         printf("       ndp -a[nt]\n");
 804         printf("       ndp [-nt] -A wait\n");
 805         printf("       ndp -c[nt]\n");
 806         printf("       ndp -d[nt] hostname\n");
 807         printf("       ndp -f[nt] filename\n");
 808         printf("       ndp -i interface [flags...]\n");
 809 #ifdef SIOCSDEFIFACE_IN6
 810         printf("       ndp -I [interface|delete]\n");
 811 #endif
 812         printf("       ndp -p\n");
 813         printf("       ndp -r\n");
 814         printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
 815         printf("       ndp -H\n");
 816         printf("       ndp -P\n");
 817         printf("       ndp -R\n");
 818         exit(1);
 819 }
 820
 821 int
 822 rtmsg(int cmd)
 823 {
 824         static int seq;
 825         int rlen;
 826         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 827         char *cp = m_rtmsg.m_space;
 828         int l;
 829
 830         errno = 0;
 831         if (cmd == RTM_DELETE)
 832                 goto doit;
 833         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 834         rtm->rtm_flags = flags;
 835         rtm->rtm_version = RTM_VERSION;
 836
 837         switch (cmd) {
 838         default:
 839                 fprintf(stderr, "ndp: internal wrong cmd\n");
 840                 exit(1);
 841         case RTM_ADD:
 842                 rtm->rtm_addrs |= RTA_GATEWAY;
 843                 rtm->rtm_rmx.rmx_expire = expire_time;
 844                 rtm->rtm_inits = RTV_EXPIRE;
 845                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 846                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 847                         rtm->rtm_flags &= ~RTF_HOST;
 848                         rtm->rtm_flags |= RTA_NETMASK;
 849                 }
 850                 /* FALLTHROUGH */
 851         case RTM_GET:
 852                 rtm->rtm_addrs |= RTA_DST;
 853         }
 854 #define NEXTADDR(w, s) \
 855         if (rtm->rtm_addrs & (w)) { \
 856                 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
 857
 858         NEXTADDR(RTA_DST, sin_m);
 859         NEXTADDR(RTA_GATEWAY, sdl_m);
 860         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 861         NEXTADDR(RTA_NETMASK, so_mask);
 862
 863         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 864 doit:
 865         l = rtm->rtm_msglen;
 866         rtm->rtm_seq = ++seq;
 867         rtm->rtm_type = cmd;
 868         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 869                 if (errno != ESRCH || cmd != RTM_DELETE) {
 870                         perror("writing to routing socket");
 871                         return (-1);
 872                 }
 873         }
 874         do {
 875                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 876         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 877         if (l < 0)
 878                 fprintf(stderr, "ndp: read from routing socket: %s\n",
 879                     strerror(errno));
 880         return (0);
 881 }
 882
 883 void
 884 ifinfo(int argc, char **argv)
 885 {
 886         struct in6_ndireq nd;
 887         int i, s;
 888         char *ifname = argv[0];
 889         u_int32_t newflags;
 890 #ifdef IPV6CTL_USETEMPADDR
 891         u_int8_t nullbuf[8];
 892 #endif
 893
 894         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 895                 perror("ndp: socket");
 896                 exit(1);
 897         }
 898         bzero(&nd, sizeof(nd));
 899         strcpy(nd.ifname, ifname);
 900         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 901                 perror("ioctl (SIOCGIFINFO_IN6)");
 902                 exit(1);
 903         }
 904 #define ND nd.ndi
 905         newflags = ND.flags;
 906         for (i = 1; i < argc; i++) {
 907                 int clear = 0;
 908                 char *cp = argv[i];
 909
 910                 if (*cp == '-') {
 911                         clear = 1;
 912                         cp++;
 913                 }
 914
 915 #define SETFLAG(s, f) \
 916         do {\
 917                 if (strcmp(cp, (s)) == 0) {\
 918                         if (clear)\
 919                                 newflags &= ~(f);\
 920                         else\
 921                                 newflags |= (f);\
 922                 }\
 923         } while (0)
 924                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 925 #ifdef ND6_IFF_ACCEPT_RTADV
 926                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 927 #endif
 928                 ND.flags = newflags;
 929                 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
 930                         perror("ioctl(SIOCSIFINFO_FLAGS)");
 931                         exit(1);
 932                 }
 933 #undef SETFLAG
 934         }
 935
 936         printf("linkmtu=%d", ND.linkmtu);
 937         printf(", curhlim=%d", ND.chlim);
 938         printf(", basereachable=%ds%dms",
 939                ND.basereachable / 1000, ND.basereachable % 1000);
 940         printf(", reachable=%ds", ND.reachable);
 941         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
 942 #ifdef IPV6CTL_USETEMPADDR
 943         memset(nullbuf, 0, sizeof(nullbuf));
 944         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
 945                 int j;
 946                 u_int8_t *rbuf;
 947
 948                 for (i = 0; i < 3; i++) {
 949                         switch(i) {
 950                         case 0:
 951                                 printf("\nRandom seed(0): ");
 952                                 rbuf = ND.randomseed0;
 953                                 break;
 954                         case 1:
 955                                 printf("\nRandom seed(1): ");
 956                                 rbuf = ND.randomseed1;
 957                                 break;
 958                         case 2:
 959                                 printf("\nRandom ID:      ");
 960                                 rbuf = ND.randomid;
 961                                 break;
 962                         }
 963                         for (j = 0; j < 8; j++)
 964                                 printf("%02x", rbuf[j]);
 965                 }
 966         }
 967 #endif
 968         if (ND.flags) {
 969                 printf("\nFlags: ");
 970                 if ((ND.flags & ND6_IFF_PERFORMNUD))
 971                         printf("nud ");
 972 #ifdef ND6_IFF_ACCEPT_RTADV
 973                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
 974                         printf("accept_rtadv ");
 975 #endif
 976         }
 977         putc('\n', stdout);
 978 #undef ND
 979
 980         close(s);
 981 }
 982
 983 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
 984 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
 985 #endif
 986
 987 void
 988 rtrlist(void)
 989 {
 990 #ifdef ICMPV6CTL_ND6_DRLIST
 991         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
 992         char *buf;
 993         struct in6_defrouter *p, *ep;
 994         size_t l;
 995         struct timeval time;
 996
 997         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
 998                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
 999                 /*NOTREACHED*/
1000         }
1001         buf = malloc(l);
1002         if (!buf) {
1003                 errx(1, "not enough core");
1004                 /*NOTREACHED*/
1005         }
1006         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1007                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1008                 /*NOTREACHED*/
1009         }
1010
1011         ep = (struct in6_defrouter *)(buf + l);
1012         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1013                 int rtpref;
1014
1015                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1016                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1017                     NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)) != 0)
1018                         strlcpy(host_buf, "?", sizeof(host_buf));
1019
1020                 printf("%s if=%s", host_buf,
1021                        if_indextoname(p->if_index, ifix_buf));
1022                 printf(", flags=%s%s",
1023                        p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1024                        p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1025                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1026                 printf(", pref=%s", rtpref_str[rtpref]);
1027
1028                 gettimeofday(&time, 0);
1029                 if (p->expire == 0)
1030                         printf(", expire=Never\n");
1031                 else
1032                         printf(", expire=%s\n",
1033                                 sec2str(p->expire - time.tv_sec));
1034         }
1035         free(buf);
1036 #else
1037         struct in6_drlist dr;
1038         int s, i;
1039         struct timeval time;
1040
1041         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1042                 perror("ndp: socket");
1043                 exit(1);
1044         }
1045         bzero(&dr, sizeof(dr));
1046         strcpy(dr.ifname, "lo0"); /* dummy */
1047         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1048                 perror("ioctl (SIOCGDRLST_IN6)");
1049                 exit(1);
1050         }
1051 #define DR dr.defrouter[i]
1052         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1053                 struct sockaddr_in6 sin6;
1054
1055                 bzero(&sin6, sizeof(sin6));
1056                 sin6.sin6_family = AF_INET6;
1057                 sin6.sin6_len = sizeof(sin6);
1058                 sin6.sin6_addr = DR.rtaddr;
1059                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1060                             sizeof(host_buf), NULL, 0,
1061                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1062
1063                 printf("%s if=%s", host_buf,
1064                        if_indextoname(DR.if_index, ifix_buf));
1065                 printf(", flags=%s%s",
1066                        DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1067                        DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1068                 gettimeofday(&time, 0);
1069                 if (DR.expire == 0)
1070                         printf(", expire=Never\n");
1071                 else
1072                         printf(", expire=%s\n",
1073                                 sec2str(DR.expire - time.tv_sec));
1074         }
1075 #undef DR
1076         close(s);
1077 #endif
1078 }
1079
1080 void
1081 plist(void)
1082 {
1083 #ifdef ICMPV6CTL_ND6_PRLIST
1084         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1085         char *buf;
1086         struct in6_prefix *p, *ep, *n;
1087         struct sockaddr_in6 *advrtr;
1088         size_t l;
1089         struct timeval time;
1090 #ifdef NI_WITHSCOPEID
1091         const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
1092         int ninflags = (nflag ? NI_NUMERICHOST : 0) | NI_WITHSCOPEID;
1093 #else
1094         const int niflags = NI_NUMERICHOST;
1095         int ninflags = nflag ? NI_NUMERICHOST : 0;
1096 #endif
1097         char namebuf[NI_MAXHOST];
1098
1099         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1100                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1101                 /*NOTREACHED*/
1102         }
1103         buf = malloc(l);
1104         if (!buf) {
1105                 errx(1, "not enough core");
1106                 /*NOTREACHED*/
1107         }
1108         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1109                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1110                 /*NOTREACHED*/
1111         }
1112
1113         ep = (struct in6_prefix *)(buf + l);
1114         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1115                 advrtr = (struct sockaddr_in6 *)(p + 1);
1116                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1117
1118                 if (getnameinfo((struct sockaddr *)&p->prefix,
1119                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1120                     NULL, 0, niflags) != 0)
1121                         strlcpy(namebuf, "?", sizeof(namebuf));
1122                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1123                        if_indextoname(p->if_index, ifix_buf));
1124
1125                 gettimeofday(&time, 0);
1126                 /*
1127                  * meaning of fields, especially flags, is very different
1128                  * by origin.  notify the difference to the users.
1129                  */
1130                 printf("flags=%s%s%s%s%s",
1131                        p->raflags.onlink ? "L" : "",
1132                        p->raflags.autonomous ? "A" : "",
1133                        (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1134                        (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1135 #ifdef NDPRF_HOME
1136                        (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1137 #else
1138                        ""
1139 #endif
1140                        );
1141                 if (p->vltime == ND6_INFINITE_LIFETIME)
1142                         printf(" vltime=infinity");
1143                 else
1144                         printf(" vltime=%ld", (long)p->vltime);
1145                 if (p->pltime == ND6_INFINITE_LIFETIME)
1146                         printf(", pltime=infinity");
1147                 else
1148                         printf(", pltime=%ld", (long)p->pltime);
1149                 if (p->expire == 0)
1150                         printf(", expire=Never");
1151                 else if (p->expire >= time.tv_sec)
1152                         printf(", expire=%s",
1153                                 sec2str(p->expire - time.tv_sec));
1154                 else
1155                         printf(", expired");
1156                 printf(", ref=%d", p->refcnt);
1157                 printf("\n");
1158                 /*
1159                  * "advertising router" list is meaningful only if the prefix
1160                  * information is from RA.
1161                  */
1162                 if (p->advrtrs) {
1163                         int j;
1164                         struct sockaddr_in6 *sin6;
1165
1166                         sin6 = (struct sockaddr_in6 *)(p + 1);
1167                         printf("  advertised by\n");
1168                         for (j = 0; j < p->advrtrs; j++) {
1169                                 struct in6_nbrinfo *nbi;
1170
1171                                 if (getnameinfo((struct sockaddr *)sin6,
1172                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1173                                     NULL, 0, ninflags) != 0)
1174                                         strlcpy(namebuf, "?", sizeof(namebuf));
1175                                 printf("    %s", namebuf);
1176
1177                                 nbi = getnbrinfo(&sin6->sin6_addr, p->if_index,
1178                                                  0);
1179                                 if (nbi) {
1180                                         switch(nbi->state) {
1181                                         case ND6_LLINFO_REACHABLE:
1182                                         case ND6_LLINFO_STALE:
1183                                         case ND6_LLINFO_DELAY:
1184                                         case ND6_LLINFO_PROBE:
1185                                                 printf(" (reachable)\n");
1186                                                 break;
1187                                         default:
1188                                                 printf(" (unreachable)\n");
1189                                         }
1190                                 } else
1191                                         printf(" (no neighbor state)\n");
1192                                 sin6++;
1193                         }
1194                 } else
1195                         printf("  No advertising router\n");
1196         }
1197         free(buf);
1198 #else
1199         struct in6_prlist pr;
1200         int s, i;
1201         struct timeval time;
1202
1203         gettimeofday(&time, 0);
1204
1205         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1206                 perror("ndp: socket");
1207                 exit(1);
1208         }
1209         bzero(&pr, sizeof(pr));
1210         strcpy(pr.ifname, "lo0"); /* dummy */
1211         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1212                 perror("ioctl (SIOCGPRLST_IN6)");
1213                 exit(1);
1214         }
1215 #define PR pr.prefix[i]
1216         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1217                 struct sockaddr_in6 p6;
1218                 char namebuf[NI_MAXHOST];
1219                 int niflags;
1220
1221 #ifdef NDPRF_ONLINK
1222                 p6 = PR.prefix;
1223 #else
1224                 memset(&p6, 0, sizeof(p6));
1225                 p6.sin6_family = AF_INET6;
1226                 p6.sin6_len = sizeof(p6);
1227                 p6.sin6_addr = PR.prefix;
1228 #endif
1229
1230                 /*
1231                  * copy link index to sin6_scope_id field.
1232                  * XXX: KAME specific.
1233                  */
1234                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1235                         u_int16_t linkid;
1236
1237                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1238                                sizeof(linkid));
1239                         linkid = ntohs(linkid);
1240                         p6.sin6_scope_id = linkid;
1241                         p6.sin6_addr.s6_addr[2] = 0;
1242                         p6.sin6_addr.s6_addr[3] = 0;
1243                 }
1244
1245                 niflags = NI_NUMERICHOST;
1246 #ifdef __KAME__
1247                 niflags |= NI_WITHSCOPEID;
1248 #endif
1249                 if (getnameinfo((struct sockaddr *)&p6,
1250                                 sizeof(p6), namebuf, sizeof(namebuf),
1251                                 NULL, 0, niflags)) {
1252                         warnx("getnameinfo failed");
1253                         continue;
1254                 }
1255                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1256                        if_indextoname(PR.if_index, ifix_buf));
1257
1258                 gettimeofday(&time, 0);
1259                 /*
1260                  * meaning of fields, especially flags, is very different
1261                  * by origin.  notify the difference to the users.
1262                  */
1263 #if 0
1264                 printf("  %s",
1265                        PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1266 #endif
1267 #ifdef NDPRF_ONLINK
1268                 printf("flags=%s%s%s%s%s",
1269                        PR.raflags.onlink ? "L" : "",
1270                        PR.raflags.autonomous ? "A" : "",
1271                        (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1272                        (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1273 #ifdef NDPRF_HOME
1274                        (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1275 #else
1276                        ""
1277 #endif
1278                        );
1279 #else
1280                 printf("flags=%s%s",
1281                        PR.raflags.onlink ? "L" : "",
1282                        PR.raflags.autonomous ? "A" : "");
1283 #endif
1284                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1285                         printf(" vltime=infinity");
1286                 else
1287                         printf(" vltime=%ld", (long)PR.vltime);
1288                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1289                         printf(", pltime=infinity");
1290                 else
1291                         printf(", pltime=%ld", (long)PR.pltime);
1292                 if (PR.expire == 0)
1293                         printf(", expire=Never");
1294                 else if (PR.expire >= time.tv_sec)
1295                         printf(", expire=%s",
1296                                 sec2str(PR.expire - time.tv_sec));
1297                 else
1298                         printf(", expired");
1299 #ifdef NDPRF_ONLINK
1300                 printf(", ref=%d", PR.refcnt);
1301 #endif
1302 #if 0
1303                 switch (PR.origin) {
1304                 case PR_ORIG_RA:
1305                         printf(", origin=RA");
1306                         break;
1307                 case PR_ORIG_RR:
1308                         printf(", origin=RR");
1309                         break;
1310                 case PR_ORIG_STATIC:
1311                         printf(", origin=static");
1312                         break;
1313                 case PR_ORIG_KERNEL:
1314                         printf(", origin=kernel");
1315                         break;
1316                 default:
1317                         printf(", origin=?");
1318                         break;
1319                 }
1320 #endif
1321                 printf("\n");
1322                 /*
1323                  * "advertising router" list is meaningful only if the prefix
1324                  * information is from RA.
1325                  */
1326                 if (0 &&        /* prefix origin is almost obsolted */
1327                     PR.origin != PR_ORIG_RA)
1328                         ;
1329                 else if (PR.advrtrs) {
1330                         int j;
1331                         printf("  advertised by\n");
1332                         for (j = 0; j < PR.advrtrs; j++) {
1333                                 struct sockaddr_in6 sin6;
1334                                 struct in6_nbrinfo *nbi;
1335
1336                                 bzero(&sin6, sizeof(sin6));
1337                                 sin6.sin6_family = AF_INET6;
1338                                 sin6.sin6_len = sizeof(sin6);
1339                                 sin6.sin6_addr = PR.advrtr[j];
1340                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1341                                 getnameinfo((struct sockaddr *)&sin6,
1342                                             sin6.sin6_len, host_buf,
1343                                             sizeof(host_buf), NULL, 0,
1344                                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1345                                 printf("    %s", host_buf);
1346
1347                                 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
1348                                                  0);
1349                                 if (nbi) {
1350                                         switch(nbi->state) {
1351                                          case ND6_LLINFO_REACHABLE:
1352                                          case ND6_LLINFO_STALE:
1353                                          case ND6_LLINFO_DELAY:
1354                                          case ND6_LLINFO_PROBE:
1355                                                  printf(" (reachable)\n");
1356                                                  break;
1357                                          default:
1358                                                  printf(" (unreachable)\n");
1359                                         }
1360                                 } else
1361                                         printf(" (no neighbor state)\n");
1362                         }
1363                         if (PR.advrtrs > DRLSTSIZ)
1364                                 printf("    and %d routers\n",
1365                                        PR.advrtrs - DRLSTSIZ);
1366                 } else
1367                         printf("  No advertising router\n");
1368         }
1369 #undef PR
1370         close(s);
1371 #endif
1372 }
1373
1374 void
1375 pfx_flush(void)
1376 {
1377         char dummyif[IFNAMSIZ+8];
1378         int s;
1379
1380         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1381                 err(1, "socket");
1382         strcpy(dummyif, "lo0"); /* dummy */
1383         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1384                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1385 }
1386
1387 void
1388 rtr_flush(void)
1389 {
1390         char dummyif[IFNAMSIZ+8];
1391         int s;
1392
1393         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1394                 err(1, "socket");
1395         strcpy(dummyif, "lo0"); /* dummy */
1396         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1397                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1398
1399         close(s);
1400 }
1401
1402 void
1403 harmonize_rtr(void)
1404 {
1405         char dummyif[IFNAMSIZ+8];
1406         int s;
1407
1408         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1409                 err(1, "socket");
1410         strcpy(dummyif, "lo0"); /* dummy */
1411         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1412                 err(1, "ioctl (SIOCSNDFLUSH_IN6)");
1413
1414         close(s);
1415 }
1416
1417 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1418 static void
1419 setdefif(char *ifname)
1420 {
1421         struct in6_ndifreq ndifreq;
1422         unsigned int ifindex;
1423
1424         if (strcasecmp(ifname, "delete") == 0)
1425                 ifindex = 0;
1426         else {
1427                 if ((ifindex = if_nametoindex(ifname)) == 0)
1428                         err(1, "failed to resolve i/f index for %s", ifname);
1429         }
1430
1431         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1432                 err(1, "socket");
1433
1434         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1435         ndifreq.ifindex = ifindex;
1436
1437         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1438                 err(1, "ioctl (SIOCSDEFIFACE_IN6)");
1439
1440         close(s);
1441 }
1442
1443 static void
1444 getdefif(void)
1445 {
1446         struct in6_ndifreq ndifreq;
1447         char ifname[IFNAMSIZ+8];
1448
1449         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1450                 err(1, "socket");
1451
1452         memset(&ndifreq, 0, sizeof(ndifreq));
1453         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1454
1455         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1456                 err(1, "ioctl (SIOCGDEFIFACE_IN6)");
1457
1458         if (ndifreq.ifindex == 0)
1459                 printf("No default interface.\n");
1460         else {
1461                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1462                         err(1, "failed to resolve ifname for index %lu",
1463                             ndifreq.ifindex);
1464                 printf("ND default interface = %s\n", ifname);
1465         }
1466
1467         close(s);
1468 }
1469 #endif
1470
1471 static char *
1472 sec2str(time_t total)
1473 {
1474         static char result[256];
1475         int days, hours, mins, secs;
1476         int first = 1;
1477         char *p = result;
1478
1479         days = total / 3600 / 24;
1480         hours = (total / 3600) % 24;
1481         mins = (total / 60) % 60;
1482         secs = total % 60;
1483
1484         if (days) {
1485                 first = 0;
1486                 p += sprintf(p, "%dd", days);
1487         }
1488         if (!first || hours) {
1489                 first = 0;
1490                 p += sprintf(p, "%dh", hours);
1491         }
1492         if (!first || mins) {
1493                 first = 0;
1494                 p += sprintf(p, "%dm", mins);
1495         }
1496         sprintf(p, "%ds", secs);
1497
1498         return(result);
1499 }
1500
1501 /*
1502  * Print the timestamp
1503  * from tcpdump/util.c
1504  */
1505 static void
1506 ts_print(const struct timeval *tvp)
1507 {
1508         int s;
1509
1510         /* Default */
1511         s = (tvp->tv_sec + thiszone) % 86400;
1512         printf("%02d:%02d:%02d.%06u ",
1513             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1514 }