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  * 4. 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     expire_time, flags, found_entry;
 344 struct  {
 345         struct  rt_msghdr m_rtm;
 346         char    m_space[512];
 347 }       m_rtmsg;
 348
 349 /*
 350  * Set an individual neighbor cache entry
 351  */
 352 int
 353 set(int argc, char **argv)
 354 {
 355         struct sockaddr_in6 *sin = &sin_m;
 356         struct sockaddr_dl *sdl;
 357         struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 358         struct addrinfo hints, *res;
 359         int gai_error;
 360         u_char *ea;
 361         char *host = argv[0], *eaddr = argv[1];
 362
 363         getsocket();
 364         argc -= 2;
 365         argv += 2;
 366         sdl_m = blank_sdl;
 367         sin_m = blank_sin;
 368
 369         bzero(&hints, sizeof(hints));
 370         hints.ai_family = AF_INET6;
 371         gai_error = getaddrinfo(host, NULL, &hints, &res);
 372         if (gai_error) {
 373                 fprintf(stderr, "ndp: %s: %s\n", host,
 374                         gai_strerror(gai_error));
 375                 return 1;
 376         }
 377         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 378 #ifdef __KAME__
 379         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 380                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 381                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 382         }
 383 #endif
 384         ea = (u_char *)LLADDR(&sdl_m);
 385         if (ndp_ether_aton(eaddr, ea) == 0)
 386                 sdl_m.sdl_alen = 6;
 387         flags = expire_time = 0;
 388         while (argc-- > 0) {
 389                 if (strncmp(argv[0], "temp", 4) == 0) {
 390                         struct timeval time;
 391                         gettimeofday(&time, 0);
 392                         expire_time = time.tv_sec + 20 * 60;
 393                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 394                         flags |= RTF_ANNOUNCE;
 395                 argv++;
 396         }
 397         if (rtmsg(RTM_GET) < 0) {
 398                 perror(host);
 399                 return (1);
 400         }
 401         sin = (struct sockaddr_in6 *)(rtm + 1);
 402         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 403         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 404                 if (sdl->sdl_family == AF_LINK &&
 405                     (rtm->rtm_flags & RTF_LLINFO) &&
 406                     !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
 407                 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 408                 case IFT_ISO88024: case IFT_ISO88025:
 409                         goto overwrite;
 410                 }
 411                 /*
 412                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 413                  */
 414                 fprintf(stderr, "set: cannot configure a new entry\n");
 415                 return 1;
 416         }
 417
 418 overwrite:
 419         if (sdl->sdl_family != AF_LINK) {
 420                 printf("cannot intuit interface index and type for %s\n", host);
 421                 return (1);
 422         }
 423         sdl_m.sdl_type = sdl->sdl_type;
 424         sdl_m.sdl_index = sdl->sdl_index;
 425         return (rtmsg(RTM_ADD));
 426 }
 427
 428 /*
 429  * Display an individual neighbor cache entry
 430  */
 431 void
 432 get(char *host)
 433 {
 434         struct sockaddr_in6 *sin = &sin_m;
 435         struct addrinfo hints, *res;
 436         int gai_error;
 437
 438         sin_m = blank_sin;
 439         bzero(&hints, sizeof(hints));
 440         hints.ai_family = AF_INET6;
 441         gai_error = getaddrinfo(host, NULL, &hints, &res);
 442         if (gai_error) {
 443                 fprintf(stderr, "ndp: %s: %s\n", host,
 444                         gai_strerror(gai_error));
 445                 return;
 446         }
 447         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 448 #ifdef __KAME__
 449         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 450                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 451                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 452         }
 453 #endif
 454         dump(&sin->sin6_addr);
 455         if (found_entry == 0) {
 456                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 457                             sizeof(host_buf), NULL ,0,
 458                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 459                 printf("%s (%s) -- no entry\n", host, host_buf);
 460                 exit(1);
 461         }
 462 }
 463
 464 /*
 465  * Delete a neighbor cache entry
 466  */
 467 int
 468 delete(char *host)
 469 {
 470         struct sockaddr_in6 *sin = &sin_m;
 471         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 472         struct sockaddr_dl *sdl;
 473         struct addrinfo hints, *res;
 474         int gai_error;
 475
 476         getsocket();
 477         sin_m = blank_sin;
 478
 479         bzero(&hints, sizeof(hints));
 480         hints.ai_family = AF_INET6;
 481         gai_error = getaddrinfo(host, NULL, &hints, &res);
 482         if (gai_error) {
 483                 fprintf(stderr, "ndp: %s: %s\n", host,
 484                         gai_strerror(gai_error));
 485                 return 1;
 486         }
 487         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 488 #ifdef __KAME__
 489         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 490                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 491                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 492         }
 493 #endif
 494         if (rtmsg(RTM_GET) < 0) {
 495                 perror(host);
 496                 return (1);
 497         }
 498         sin = (struct sockaddr_in6 *)(rtm + 1);
 499         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 500         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 501                 if (sdl->sdl_family == AF_LINK &&
 502                     (rtm->rtm_flags & RTF_LLINFO) &&
 503                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 504                         goto delete;
 505                 }
 506                 /*
 507                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 508                  */
 509                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 510                 return 1;
 511         }
 512
 513 delete:
 514         if (sdl->sdl_family != AF_LINK) {
 515                 printf("cannot locate %s\n", host);
 516                 return (1);
 517         }
 518         if (rtmsg(RTM_DELETE) == 0) {
 519                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 520
 521 #ifdef __KAME__
 522                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 523                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 524                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 525                 }
 526 #endif
 527                 getnameinfo((struct sockaddr *)&s6,
 528                             s6.sin6_len, host_buf,
 529                             sizeof(host_buf), NULL, 0,
 530                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 531                 printf("%s (%s) deleted\n", host, host_buf);
 532         }
 533
 534         return 0;
 535 }
 536
 537 #define W_ADDR  31
 538 #define W_LL    17
 539 #define W_IF    6
 540
 541 /*
 542  * Dump the entire neighbor cache
 543  */
 544 void
 545 dump(struct in6_addr *addr)
 546 {
 547         int mib[6];
 548         size_t needed;
 549         char *lim, *buf, *next;
 550         struct rt_msghdr *rtm;
 551         struct sockaddr_in6 *sin;
 552         struct sockaddr_dl *sdl;
 553         extern int h_errno;
 554         struct in6_nbrinfo *nbi;
 555         struct timeval time;
 556         int addrwidth;
 557         int llwidth;
 558         int ifwidth;
 559         char flgbuf[8];
 560         char *ifname;
 561
 562         /* Print header */
 563         if (!tflag && !cflag)
 564                 printf("%-*.*s %-*.*s %*.*s %-9.9s %2s %4s %4s\n",
 565                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 566                     W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs");
 567
 568 again:;
 569         mib[0] = CTL_NET;
 570         mib[1] = PF_ROUTE;
 571         mib[2] = 0;
 572         mib[3] = AF_INET6;
 573         mib[4] = NET_RT_FLAGS;
 574         mib[5] = RTF_LLINFO;
 575         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 576                 err(1, "sysctl(PF_ROUTE estimate)");
 577         if (needed > 0) {
 578                 if ((buf = malloc(needed)) == NULL)
 579                         errx(1, "malloc");
 580                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 581                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 582                 lim = buf + needed;
 583         } else
 584                 buf = lim = NULL;
 585
 586         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 587                 int isrouter = 0, prbs = 0;
 588
 589                 rtm = (struct rt_msghdr *)next;
 590                 sin = (struct sockaddr_in6 *)(rtm + 1);
 591                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 592
 593                 /*
 594                  * Some OSes can produce a route that has the LINK flag but
 595                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 596                  * and BSD/OS, where xx is not the interface identifier on
 597                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 598                  * so we skip them.
 599                  * XXX: such routes should have the GATEWAY flag, not the
 600                  * LINK flag.  However, there are rotten routing software
 601                  * that advertises all routes that have the GATEWAY flag.
 602                  * Thus, KAME kernel intentionally does not set the LINK flag.
 603                  * What is to be fixed is not ndp, but such routing software
 604                  * (and the kernel workaround)...
 605                  */
 606                 if (sdl->sdl_family != AF_LINK)
 607                         continue;
 608
 609                 if (addr) {
 610                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 611                                 continue;
 612                         found_entry = 1;
 613                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 614                         continue;
 615                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 616                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 617                         /* XXX: should scope id be filled in the kernel? */
 618                         if (sin->sin6_scope_id == 0)
 619                                 sin->sin6_scope_id = sdl->sdl_index;
 620 #ifdef __KAME__
 621                         /* KAME specific hack; removed the embedded id */
 622                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 623 #endif
 624                 }
 625                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 626                             sizeof(host_buf), NULL, 0,
 627                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 628                 if (cflag == 1) {
 629 #ifdef RTF_WASCLONED
 630                         if (rtm->rtm_flags & RTF_WASCLONED)
 631                                 delete(host_buf);
 632 #else
 633                         delete(host_buf);
 634 #endif
 635                         continue;
 636                 }
 637                 gettimeofday(&time, 0);
 638                 if (tflag)
 639                         ts_print(&time);
 640
 641                 addrwidth = strlen(host_buf);
 642                 if (addrwidth < W_ADDR)
 643                         addrwidth = W_ADDR;
 644                 llwidth = strlen(ether_str(sdl));
 645                 if (W_ADDR + W_LL - addrwidth > llwidth)
 646                         llwidth = W_ADDR + W_LL - addrwidth;
 647                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 648                 if (!ifname)
 649                         ifname = "?";
 650                 ifwidth = strlen(ifname);
 651                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 652                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 653
 654                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 655                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 656
 657                 /* Print neighbor discovery specific informations */
 658                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 659                 if (nbi) {
 660                         if (nbi->expire > time.tv_sec) {
 661                                 printf(" %-9.9s",
 662                                        sec2str(nbi->expire - time.tv_sec));
 663                         } else if (nbi->expire == 0)
 664                                 printf(" %-9.9s", "permanent");
 665                         else
 666                                 printf(" %-9.9s", "expired");
 667
 668                         switch(nbi->state) {
 669                          case ND6_LLINFO_NOSTATE:
 670                                  printf(" N");
 671                                  break;
 672 #ifdef ND6_LLINFO_WAITDELETE
 673                          case ND6_LLINFO_WAITDELETE:
 674                                  printf(" W");
 675                                  break;
 676 #endif
 677                          case ND6_LLINFO_INCOMPLETE:
 678                                  printf(" I");
 679                                  break;
 680                          case ND6_LLINFO_REACHABLE:
 681                                  printf(" R");
 682                                  break;
 683                          case ND6_LLINFO_STALE:
 684                                  printf(" S");
 685                                  break;
 686                          case ND6_LLINFO_DELAY:
 687                                  printf(" D");
 688                                  break;
 689                          case ND6_LLINFO_PROBE:
 690                                  printf(" P");
 691                                  break;
 692                          default:
 693                                  printf(" ?");
 694                                  break;
 695                         }
 696
 697                         isrouter = nbi->isrouter;
 698                         prbs = nbi->asked;
 699                 } else {
 700                         warnx("failed to get neighbor information");
 701                         printf("  ");
 702                 }
 703                 putchar(' ');
 704
 705                 /*
 706                  * other flags. R: router, P: proxy, W: ??
 707                  */
 708                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 709                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 710                                 isrouter ? "R" : "",
 711                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 712                 } else {
 713                         sin = (struct sockaddr_in6 *)
 714                                 (sdl->sdl_len + (char *)sdl);
 715                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 716                                 isrouter ? "R" : "",
 717                                 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr)
 718                                         ? "P" : "",
 719                                 (sin->sin6_len != sizeof(struct sockaddr_in6))
 720                                         ? "W" : "",
 721                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 722                 }
 723                 printf(" %-4.4s", flgbuf);
 724
 725                 if (prbs)
 726                         printf(" %4d", prbs);
 727
 728                 printf("\n");
 729         }
 730         if (buf != NULL)
 731                 free(buf);
 732
 733         if (repeat) {
 734                 printf("\n");
 735                 sleep(repeat);
 736                 goto again;
 737         }
 738 }
 739
 740 static struct in6_nbrinfo *
 741 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
 742 {
 743         static struct in6_nbrinfo nbi;
 744         int s;
 745
 746         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 747                 err(1, "socket");
 748
 749         bzero(&nbi, sizeof(nbi));
 750         if_indextoname(ifindex, nbi.ifname);
 751         nbi.addr = *addr;
 752         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 753                 if (warning)
 754                         warn("ioctl(SIOCGNBRINFO_IN6)");
 755                 close(s);
 756                 return(NULL);
 757         }
 758
 759         close(s);
 760         return(&nbi);
 761 }
 762
 763 static char *
 764 ether_str(struct sockaddr_dl *sdl)
 765 {
 766         static char ebuf[32];
 767         u_char *cp;
 768
 769         if (sdl->sdl_alen) {
 770                 cp = (u_char *)LLADDR(sdl);
 771                 sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
 772                         cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 773         } else {
 774                 sprintf(ebuf, "(incomplete)");
 775         }
 776
 777         return(ebuf);
 778 }
 779
 780 int
 781 ndp_ether_aton(char *a, u_char *n)
 782 {
 783         int i, o[6];
 784
 785         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 786                                            &o[3], &o[4], &o[5]);
 787         if (i != 6) {
 788                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 789                 return (1);
 790         }
 791         for (i=0; i<6; i++)
 792                 n[i] = o[i];
 793         return (0);
 794 }
 795
 796 void
 797 usage(void)
 798 {
 799         printf("usage: ndp hostname\n");
 800         printf("       ndp -a[nt]\n");
 801         printf("       ndp [-nt] -A wait\n");
 802         printf("       ndp -c[nt]\n");
 803         printf("       ndp -d[nt] hostname\n");
 804         printf("       ndp -f[nt] filename\n");
 805         printf("       ndp -i interface [flags...]\n");
 806 #ifdef SIOCSDEFIFACE_IN6
 807         printf("       ndp -I [interface|delete]\n");
 808 #endif
 809         printf("       ndp -p\n");
 810         printf("       ndp -r\n");
 811         printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
 812         printf("       ndp -H\n");
 813         printf("       ndp -P\n");
 814         printf("       ndp -R\n");
 815         exit(1);
 816 }
 817
 818 int
 819 rtmsg(int cmd)
 820 {
 821         static int seq;
 822         int rlen;
 823         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 824         char *cp = m_rtmsg.m_space;
 825         int l;
 826
 827         errno = 0;
 828         if (cmd == RTM_DELETE)
 829                 goto doit;
 830         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 831         rtm->rtm_flags = flags;
 832         rtm->rtm_version = RTM_VERSION;
 833
 834         switch (cmd) {
 835         default:
 836                 fprintf(stderr, "ndp: internal wrong cmd\n");
 837                 exit(1);
 838         case RTM_ADD:
 839                 rtm->rtm_addrs |= RTA_GATEWAY;
 840                 rtm->rtm_rmx.rmx_expire = expire_time;
 841                 rtm->rtm_inits = RTV_EXPIRE;
 842                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 843                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 844                         rtm->rtm_flags &= ~RTF_HOST;
 845                         rtm->rtm_flags |= RTA_NETMASK;
 846                 }
 847                 /* FALLTHROUGH */
 848         case RTM_GET:
 849                 rtm->rtm_addrs |= RTA_DST;
 850         }
 851 #define NEXTADDR(w, s) \
 852         if (rtm->rtm_addrs & (w)) { \
 853                 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
 854
 855         NEXTADDR(RTA_DST, sin_m);
 856         NEXTADDR(RTA_GATEWAY, sdl_m);
 857         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 858         NEXTADDR(RTA_NETMASK, so_mask);
 859
 860         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 861 doit:
 862         l = rtm->rtm_msglen;
 863         rtm->rtm_seq = ++seq;
 864         rtm->rtm_type = cmd;
 865         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 866                 if (errno != ESRCH || cmd != RTM_DELETE) {
 867                         perror("writing to routing socket");
 868                         return (-1);
 869                 }
 870         }
 871         do {
 872                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 873         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 874         if (l < 0)
 875                 fprintf(stderr, "ndp: read from routing socket: %s\n",
 876                     strerror(errno));
 877         return (0);
 878 }
 879
 880 void
 881 ifinfo(int argc, char **argv)
 882 {
 883         struct in6_ndireq nd;
 884         int i, s;
 885         char *ifname = argv[0];
 886         u_int32_t newflags;
 887 #ifdef IPV6CTL_USETEMPADDR
 888         u_int8_t nullbuf[8];
 889 #endif
 890
 891         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 892                 perror("ndp: socket");
 893                 exit(1);
 894         }
 895         bzero(&nd, sizeof(nd));
 896         strcpy(nd.ifname, ifname);
 897         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 898                 perror("ioctl (SIOCGIFINFO_IN6)");
 899                 exit(1);
 900         }
 901 #define ND nd.ndi
 902         newflags = ND.flags;
 903         for (i = 1; i < argc; i++) {
 904                 int clear = 0;
 905                 char *cp = argv[i];
 906
 907                 if (*cp == '-') {
 908                         clear = 1;
 909                         cp++;
 910                 }
 911
 912 #define SETFLAG(s, f) \
 913         do {\
 914                 if (strcmp(cp, (s)) == 0) {\
 915                         if (clear)\
 916                                 newflags &= ~(f);\
 917                         else\
 918                                 newflags |= (f);\
 919                 }\
 920         } while (0)
 921                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 922 #ifdef ND6_IFF_ACCEPT_RTADV
 923                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 924 #endif
 925                 ND.flags = newflags;
 926                 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
 927                         perror("ioctl(SIOCSIFINFO_FLAGS)");
 928                         exit(1);
 929                 }
 930 #undef SETFLAG
 931         }
 932
 933         printf("linkmtu=%d", ND.linkmtu);
 934         printf(", curhlim=%d", ND.chlim);
 935         printf(", basereachable=%ds%dms",
 936                ND.basereachable / 1000, ND.basereachable % 1000);
 937         printf(", reachable=%ds", ND.reachable);
 938         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
 939 #ifdef IPV6CTL_USETEMPADDR
 940         memset(nullbuf, 0, sizeof(nullbuf));
 941         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
 942                 int j;
 943                 u_int8_t *rbuf;
 944
 945                 for (i = 0; i < 3; i++) {
 946                         switch(i) {
 947                         case 0:
 948                                 printf("\nRandom seed(0): ");
 949                                 rbuf = ND.randomseed0;
 950                                 break;
 951                         case 1:
 952                                 printf("\nRandom seed(1): ");
 953                                 rbuf = ND.randomseed1;
 954                                 break;
 955                         case 2:
 956                                 printf("\nRandom ID:      ");
 957                                 rbuf = ND.randomid;
 958                                 break;
 959                         }
 960                         for (j = 0; j < 8; j++)
 961                                 printf("%02x", rbuf[j]);
 962                 }
 963         }
 964 #endif
 965         if (ND.flags) {
 966                 printf("\nFlags: ");
 967                 if ((ND.flags & ND6_IFF_PERFORMNUD))
 968                         printf("nud ");
 969 #ifdef ND6_IFF_ACCEPT_RTADV
 970                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
 971                         printf("accept_rtadv ");
 972 #endif
 973         }
 974         putc('\n', stdout);
 975 #undef ND
 976
 977         close(s);
 978 }
 979
 980 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
 981 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
 982 #endif
 983
 984 void
 985 rtrlist(void)
 986 {
 987 #ifdef ICMPV6CTL_ND6_DRLIST
 988         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
 989         char *buf;
 990         struct in6_defrouter *p, *ep;
 991         size_t l;
 992         struct timeval time;
 993
 994         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
 995                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
 996                 /*NOTREACHED*/
 997         }
 998         buf = malloc(l);
 999         if (!buf) {
1000                 errx(1, "not enough core");
1001                 /*NOTREACHED*/
1002         }
1003         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1004                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1005                 /*NOTREACHED*/
1006         }
1007
1008         ep = (struct in6_defrouter *)(buf + l);
1009         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1010                 int rtpref;
1011
1012                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1013                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1014                     NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)) != 0)
1015                         strlcpy(host_buf, "?", sizeof(host_buf));
1016
1017                 printf("%s if=%s", host_buf,
1018                        if_indextoname(p->if_index, ifix_buf));
1019                 printf(", flags=%s%s",
1020                        p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1021                        p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1022                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1023                 printf(", pref=%s", rtpref_str[rtpref]);
1024
1025                 gettimeofday(&time, 0);
1026                 if (p->expire == 0)
1027                         printf(", expire=Never\n");
1028                 else
1029                         printf(", expire=%s\n",
1030                                 sec2str(p->expire - time.tv_sec));
1031         }
1032         free(buf);
1033 #else
1034         struct in6_drlist dr;
1035         int s, i;
1036         struct timeval time;
1037
1038         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1039                 perror("ndp: socket");
1040                 exit(1);
1041         }
1042         bzero(&dr, sizeof(dr));
1043         strcpy(dr.ifname, "lo0"); /* dummy */
1044         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1045                 perror("ioctl (SIOCGDRLST_IN6)");
1046                 exit(1);
1047         }
1048 #define DR dr.defrouter[i]
1049         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1050                 struct sockaddr_in6 sin6;
1051
1052                 bzero(&sin6, sizeof(sin6));
1053                 sin6.sin6_family = AF_INET6;
1054                 sin6.sin6_len = sizeof(sin6);
1055                 sin6.sin6_addr = DR.rtaddr;
1056                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1057                             sizeof(host_buf), NULL, 0,
1058                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1059
1060                 printf("%s if=%s", host_buf,
1061                        if_indextoname(DR.if_index, ifix_buf));
1062                 printf(", flags=%s%s",
1063                        DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1064                        DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1065                 gettimeofday(&time, 0);
1066                 if (DR.expire == 0)
1067                         printf(", expire=Never\n");
1068                 else
1069                         printf(", expire=%s\n",
1070                                 sec2str(DR.expire - time.tv_sec));
1071         }
1072 #undef DR
1073         close(s);
1074 #endif
1075 }
1076
1077 void
1078 plist(void)
1079 {
1080 #ifdef ICMPV6CTL_ND6_PRLIST
1081         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1082         char *buf;
1083         struct in6_prefix *p, *ep, *n;
1084         struct sockaddr_in6 *advrtr;
1085         size_t l;
1086         struct timeval time;
1087 #ifdef NI_WITHSCOPEID
1088         const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
1089         int ninflags = (nflag ? NI_NUMERICHOST : 0) | NI_WITHSCOPEID;
1090 #else
1091         const int niflags = NI_NUMERICHOST;
1092         int ninflags = nflag ? NI_NUMERICHOST : 0;
1093 #endif
1094         char namebuf[NI_MAXHOST];
1095
1096         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1097                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1098                 /*NOTREACHED*/
1099         }
1100         buf = malloc(l);
1101         if (!buf) {
1102                 errx(1, "not enough core");
1103                 /*NOTREACHED*/
1104         }
1105         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1106                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1107                 /*NOTREACHED*/
1108         }
1109
1110         ep = (struct in6_prefix *)(buf + l);
1111         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1112                 advrtr = (struct sockaddr_in6 *)(p + 1);
1113                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1114
1115                 if (getnameinfo((struct sockaddr *)&p->prefix,
1116                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1117                     NULL, 0, niflags) != 0)
1118                         strlcpy(namebuf, "?", sizeof(namebuf));
1119                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1120                        if_indextoname(p->if_index, ifix_buf));
1121
1122                 gettimeofday(&time, 0);
1123                 /*
1124                  * meaning of fields, especially flags, is very different
1125                  * by origin.  notify the difference to the users.
1126                  */
1127                 printf("flags=%s%s%s%s%s",
1128                        p->raflags.onlink ? "L" : "",
1129                        p->raflags.autonomous ? "A" : "",
1130                        (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1131                        (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1132 #ifdef NDPRF_HOME
1133                        (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1134 #else
1135                        ""
1136 #endif
1137                        );
1138                 if (p->vltime == ND6_INFINITE_LIFETIME)
1139                         printf(" vltime=infinity");
1140                 else
1141                         printf(" vltime=%ld", (long)p->vltime);
1142                 if (p->pltime == ND6_INFINITE_LIFETIME)
1143                         printf(", pltime=infinity");
1144                 else
1145                         printf(", pltime=%ld", (long)p->pltime);
1146                 if (p->expire == 0)
1147                         printf(", expire=Never");
1148                 else if (p->expire >= time.tv_sec)
1149                         printf(", expire=%s",
1150                                 sec2str(p->expire - time.tv_sec));
1151                 else
1152                         printf(", expired");
1153                 printf(", ref=%d", p->refcnt);
1154                 printf("\n");
1155                 /*
1156                  * "advertising router" list is meaningful only if the prefix
1157                  * information is from RA.
1158                  */
1159                 if (p->advrtrs) {
1160                         int j;
1161                         struct sockaddr_in6 *sin6;
1162
1163                         sin6 = (struct sockaddr_in6 *)(p + 1);
1164                         printf("  advertised by\n");
1165                         for (j = 0; j < p->advrtrs; j++) {
1166                                 struct in6_nbrinfo *nbi;
1167
1168                                 if (getnameinfo((struct sockaddr *)sin6,
1169                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1170                                     NULL, 0, ninflags) != 0)
1171                                         strlcpy(namebuf, "?", sizeof(namebuf));
1172                                 printf("    %s", namebuf);
1173
1174                                 nbi = getnbrinfo(&sin6->sin6_addr, p->if_index,
1175                                                  0);
1176                                 if (nbi) {
1177                                         switch(nbi->state) {
1178                                         case ND6_LLINFO_REACHABLE:
1179                                         case ND6_LLINFO_STALE:
1180                                         case ND6_LLINFO_DELAY:
1181                                         case ND6_LLINFO_PROBE:
1182                                                 printf(" (reachable)\n");
1183                                                 break;
1184                                         default:
1185                                                 printf(" (unreachable)\n");
1186                                         }
1187                                 } else
1188                                         printf(" (no neighbor state)\n");
1189                                 sin6++;
1190                         }
1191                 } else
1192                         printf("  No advertising router\n");
1193         }
1194         free(buf);
1195 #else
1196         struct in6_prlist pr;
1197         int s, i;
1198         struct timeval time;
1199
1200         gettimeofday(&time, 0);
1201
1202         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1203                 perror("ndp: socket");
1204                 exit(1);
1205         }
1206         bzero(&pr, sizeof(pr));
1207         strcpy(pr.ifname, "lo0"); /* dummy */
1208         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1209                 perror("ioctl (SIOCGPRLST_IN6)");
1210                 exit(1);
1211         }
1212 #define PR pr.prefix[i]
1213         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1214                 struct sockaddr_in6 p6;
1215                 char namebuf[NI_MAXHOST];
1216                 int niflags;
1217
1218 #ifdef NDPRF_ONLINK
1219                 p6 = PR.prefix;
1220 #else
1221                 memset(&p6, 0, sizeof(p6));
1222                 p6.sin6_family = AF_INET6;
1223                 p6.sin6_len = sizeof(p6);
1224                 p6.sin6_addr = PR.prefix;
1225 #endif
1226
1227                 /*
1228                  * copy link index to sin6_scope_id field.
1229                  * XXX: KAME specific.
1230                  */
1231                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1232                         u_int16_t linkid;
1233
1234                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1235                                sizeof(linkid));
1236                         linkid = ntohs(linkid);
1237                         p6.sin6_scope_id = linkid;
1238                         p6.sin6_addr.s6_addr[2] = 0;
1239                         p6.sin6_addr.s6_addr[3] = 0;
1240                 }
1241
1242                 niflags = NI_NUMERICHOST;
1243 #ifdef __KAME__
1244                 niflags |= NI_WITHSCOPEID;
1245 #endif
1246                 if (getnameinfo((struct sockaddr *)&p6,
1247                                 sizeof(p6), namebuf, sizeof(namebuf),
1248                                 NULL, 0, niflags)) {
1249                         warnx("getnameinfo failed");
1250                         continue;
1251                 }
1252                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1253                        if_indextoname(PR.if_index, ifix_buf));
1254
1255                 gettimeofday(&time, 0);
1256                 /*
1257                  * meaning of fields, especially flags, is very different
1258                  * by origin.  notify the difference to the users.
1259                  */
1260 #if 0
1261                 printf("  %s",
1262                        PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1263 #endif
1264 #ifdef NDPRF_ONLINK
1265                 printf("flags=%s%s%s%s%s",
1266                        PR.raflags.onlink ? "L" : "",
1267                        PR.raflags.autonomous ? "A" : "",
1268                        (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1269                        (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1270 #ifdef NDPRF_HOME
1271                        (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1272 #else
1273                        ""
1274 #endif
1275                        );
1276 #else
1277                 printf("flags=%s%s",
1278                        PR.raflags.onlink ? "L" : "",
1279                        PR.raflags.autonomous ? "A" : "");
1280 #endif
1281                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1282                         printf(" vltime=infinity");
1283                 else
1284                         printf(" vltime=%ld", (long)PR.vltime);
1285                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1286                         printf(", pltime=infinity");
1287                 else
1288                         printf(", pltime=%ld", (long)PR.pltime);
1289                 if (PR.expire == 0)
1290                         printf(", expire=Never");
1291                 else if (PR.expire >= time.tv_sec)
1292                         printf(", expire=%s",
1293                                 sec2str(PR.expire - time.tv_sec));
1294                 else
1295                         printf(", expired");
1296 #ifdef NDPRF_ONLINK
1297                 printf(", ref=%d", PR.refcnt);
1298 #endif
1299 #if 0
1300                 switch (PR.origin) {
1301                 case PR_ORIG_RA:
1302                         printf(", origin=RA");
1303                         break;
1304                 case PR_ORIG_RR:
1305                         printf(", origin=RR");
1306                         break;
1307                 case PR_ORIG_STATIC:
1308                         printf(", origin=static");
1309                         break;
1310                 case PR_ORIG_KERNEL:
1311                         printf(", origin=kernel");
1312                         break;
1313                 default:
1314                         printf(", origin=?");
1315                         break;
1316                 }
1317 #endif
1318                 printf("\n");
1319                 /*
1320                  * "advertising router" list is meaningful only if the prefix
1321                  * information is from RA.
1322                  */
1323                 if (0 &&        /* prefix origin is almost obsolted */
1324                     PR.origin != PR_ORIG_RA)
1325                         ;
1326                 else if (PR.advrtrs) {
1327                         int j;
1328                         printf("  advertised by\n");
1329                         for (j = 0; j < PR.advrtrs; j++) {
1330                                 struct sockaddr_in6 sin6;
1331                                 struct in6_nbrinfo *nbi;
1332
1333                                 bzero(&sin6, sizeof(sin6));
1334                                 sin6.sin6_family = AF_INET6;
1335                                 sin6.sin6_len = sizeof(sin6);
1336                                 sin6.sin6_addr = PR.advrtr[j];
1337                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1338                                 getnameinfo((struct sockaddr *)&sin6,
1339                                             sin6.sin6_len, host_buf,
1340                                             sizeof(host_buf), NULL, 0,
1341                                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1342                                 printf("    %s", host_buf);
1343
1344                                 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
1345                                                  0);
1346                                 if (nbi) {
1347                                         switch(nbi->state) {
1348                                          case ND6_LLINFO_REACHABLE:
1349                                          case ND6_LLINFO_STALE:
1350                                          case ND6_LLINFO_DELAY:
1351                                          case ND6_LLINFO_PROBE:
1352                                                  printf(" (reachable)\n");
1353                                                  break;
1354                                          default:
1355                                                  printf(" (unreachable)\n");
1356                                         }
1357                                 } else
1358                                         printf(" (no neighbor state)\n");
1359                         }
1360                         if (PR.advrtrs > DRLSTSIZ)
1361                                 printf("    and %d routers\n",
1362                                        PR.advrtrs - DRLSTSIZ);
1363                 } else
1364                         printf("  No advertising router\n");
1365         }
1366 #undef PR
1367         close(s);
1368 #endif
1369 }
1370
1371 void
1372 pfx_flush(void)
1373 {
1374         char dummyif[IFNAMSIZ+8];
1375         int s;
1376
1377         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1378                 err(1, "socket");
1379         strcpy(dummyif, "lo0"); /* dummy */
1380         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1381                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1382 }
1383
1384 void
1385 rtr_flush(void)
1386 {
1387         char dummyif[IFNAMSIZ+8];
1388         int s;
1389
1390         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1391                 err(1, "socket");
1392         strcpy(dummyif, "lo0"); /* dummy */
1393         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1394                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1395
1396         close(s);
1397 }
1398
1399 void
1400 harmonize_rtr(void)
1401 {
1402         char dummyif[IFNAMSIZ+8];
1403         int s;
1404
1405         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1406                 err(1, "socket");
1407         strcpy(dummyif, "lo0"); /* dummy */
1408         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1409                 err(1, "ioctl (SIOCSNDFLUSH_IN6)");
1410
1411         close(s);
1412 }
1413
1414 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1415 static void
1416 setdefif(char *ifname)
1417 {
1418         struct in6_ndifreq ndifreq;
1419         unsigned int ifindex;
1420
1421         if (strcasecmp(ifname, "delete") == 0)
1422                 ifindex = 0;
1423         else {
1424                 if ((ifindex = if_nametoindex(ifname)) == 0)
1425                         err(1, "failed to resolve i/f index for %s", ifname);
1426         }
1427
1428         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1429                 err(1, "socket");
1430
1431         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1432         ndifreq.ifindex = ifindex;
1433
1434         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1435                 err(1, "ioctl (SIOCSDEFIFACE_IN6)");
1436
1437         close(s);
1438 }
1439
1440 static void
1441 getdefif(void)
1442 {
1443         struct in6_ndifreq ndifreq;
1444         char ifname[IFNAMSIZ+8];
1445
1446         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1447                 err(1, "socket");
1448
1449         memset(&ndifreq, 0, sizeof(ndifreq));
1450         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1451
1452         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1453                 err(1, "ioctl (SIOCGDEFIFACE_IN6)");
1454
1455         if (ndifreq.ifindex == 0)
1456                 printf("No default interface.\n");
1457         else {
1458                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1459                         err(1, "failed to resolve ifname for index %lu",
1460                             ndifreq.ifindex);
1461                 printf("ND default interface = %s\n", ifname);
1462         }
1463
1464         close(s);
1465 }
1466 #endif
1467
1468 static char *
1469 sec2str(time_t total)
1470 {
1471         static char result[256];
1472         int days, hours, mins, secs;
1473         int first = 1;
1474         char *p = result;
1475
1476         days = total / 3600 / 24;
1477         hours = (total / 3600) % 24;
1478         mins = (total / 60) % 60;
1479         secs = total % 60;
1480
1481         if (days) {
1482                 first = 0;
1483                 p += sprintf(p, "%dd", days);
1484         }
1485         if (!first || hours) {
1486                 first = 0;
1487                 p += sprintf(p, "%dh", hours);
1488         }
1489         if (!first || mins) {
1490                 first = 0;
1491                 p += sprintf(p, "%dm", mins);
1492         }
1493         sprintf(p, "%ds", secs);
1494
1495         return(result);
1496 }
1497
1498 /*
1499  * Print the timestamp
1500  * from tcpdump/util.c
1501  */
1502 static void
1503 ts_print(const struct timeval *tvp)
1504 {
1505         int s;
1506
1507         /* Default */
1508         s = (tvp->tv_sec + thiszone) % 86400;
1509         printf("%02d:%02d:%02d.%06u ",
1510             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1511 }