usr.sbin/ndp/ndp.c

   1 /*      $FreeBSD: src/usr.sbin/ndp/ndp.c,v 1.2.2.5 2001/08/13 02:58:26 sumikawa Exp $   */
   2 /*      $DragonFly: src/usr.sbin/ndp/ndp.c,v 1.5 2004/12/18 22:48:04 swildner 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. All advertising materials mentioning features or use of this software
  49  *    must display the following acknowledgement:
  50  *      This product includes software developed by the University of
  51  *      California, Berkeley and its contributors.
  52  * 4. Neither the name of the University nor the names of its contributors
  53  *    may be used to endorse or promote products derived from this software
  54  *    without specific prior written permission.
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  57  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  58  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  59  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  60  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  61  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  62  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  64  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  65  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  66  * SUCH DAMAGE.
  67  */
  68
  69 /*
  70  * Based on:
  71  * "@(#) Copyright (c) 1984, 1993\n\
  72  *      The Regents of the University of California.  All rights reserved.\n";
  73  *
  74  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  75  */
  76
  77 /*
  78  * ndp - display, set, delete and flush neighbor cache
  79  */
  80
  81
  82 #include <sys/param.h>
  83 #include <sys/file.h>
  84 #include <sys/ioctl.h>
  85 #include <sys/socket.h>
  86 #include <sys/sysctl.h>
  87 #include <sys/time.h>
  88 #include <sys/queue.h>
  89
  90 #include <net/if.h>
  91 #include <net/if_var.h>
  92 #include <net/if_dl.h>
  93 #include <net/if_types.h>
  94 #include <net/route.h>
  95
  96 #include <netinet/in.h>
  97 #include <netinet/if_ether.h>
  98
  99 #include <netinet/icmp6.h>
 100 #include <netinet6/in6_var.h>
 101 #include <netinet6/nd6.h>
 102
 103 #include <arpa/inet.h>
 104
 105 #include <netdb.h>
 106 #include <errno.h>
 107 #include <nlist.h>
 108 #include <stdio.h>
 109 #include <string.h>
 110 #include <paths.h>
 111 #include <err.h>
 112 #include <stdlib.h>
 113 #include <fcntl.h>
 114 #include <unistd.h>
 115 #include "gmt2local.h"
 116
 117 #ifndef NI_WITHSCOPEID
 118 #define NI_WITHSCOPEID  0
 119 #endif
 120
 121 /* packing rule for routing socket */
 122 #define ROUNDUP(a) \
 123         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 124 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 125
 126 static int pid;
 127 static int cflag;
 128 static int nflag;
 129 static int tflag;
 130 static int32_t thiszone;        /* time difference with gmt */
 131 static int s = -1;
 132 static int repeat = 0;
 133
 134 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 135 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 136 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 137
 138 int main(int, char **);
 139 int file(char *);
 140 void getsocket(void);
 141 int set(int, char **);
 142 void get(char *);
 143 int delete(char *);
 144 void dump(struct in6_addr *);
 145 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *addr,
 146                                            int ifindex, int);
 147 static char *ether_str(struct sockaddr_dl *);
 148 int ndp_ether_aton(char *, u_char *);
 149 void usage(void);
 150 int rtmsg(int);
 151 void ifinfo(int, char **);
 152 void rtrlist(void);
 153 void plist(void);
 154 void pfx_flush(void);
 155 void rtrlist(void);
 156 void rtr_flush(void);
 157 void harmonize_rtr(void);
 158 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 159 static void getdefif(void);
 160 static void setdefif(char *);
 161 #endif
 162 static char *sec2str(time_t t);
 163 static char *ether_str(struct sockaddr_dl *sdl);
 164 static void ts_print(const struct timeval *);
 165
 166 static char *rtpref_str[] = {
 167         "medium",               /* 00 */
 168         "high",                 /* 01 */
 169         "rsv",                  /* 10 */
 170         "low"                   /* 11 */
 171 };
 172
 173 int
 174 main(int argc, char **argv)
 175 {
 176         int ch;
 177         int aflag = 0, dflag = 0, sflag = 0, Hflag = 0,
 178                 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
 179
 180         pid = getpid();
 181         thiszone = gmt2local(0);
 182         while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != -1)
 183                 switch ((char)ch) {
 184                 case 'a':
 185                         aflag = 1;
 186                         break;
 187                 case 'c':
 188                         cflag = 1;
 189                         break;
 190                 case 'd':
 191                         dflag = 1;
 192                         break;
 193                 case 'I':
 194 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 195                         if (argc > 2)
 196                                 setdefif(argv[2]);
 197                         getdefif(); /* always call it to print the result */
 198                         exit(0);
 199 #else
 200                         errx(1, "not supported yet");
 201                         /*NOTREACHED*/
 202 #endif
 203                 case 'i' :
 204                         argc -= optind;
 205                         argv += optind;
 206                         if (argc < 1)
 207                                 usage();
 208                         ifinfo(argc, argv);
 209                         exit(0);
 210                 case 'n':
 211                         nflag = 1;
 212                         continue;
 213                 case 'p':
 214                         pflag = 1;
 215                         break;
 216                 case 'f' :
 217                         if (argc != 3)
 218                                 usage();
 219                         file(argv[2]);
 220                         exit(0);
 221                 case 'l' :
 222                         /* obsolete, ignored */
 223                         break;
 224                 case 'r' :
 225                         rflag = 1;
 226                         break;
 227                 case 's':
 228                         sflag = 1;
 229                         break;
 230                 case 't':
 231                         tflag = 1;
 232                         break;
 233                 case 'A':
 234                         aflag = 1;
 235                         repeat = atoi(optarg);
 236                         if (repeat < 0)
 237                                 usage();
 238                         break;
 239                 case 'H' :
 240                         Hflag = 1;
 241                         break;
 242                 case 'P':
 243                         Pflag = 1;
 244                         break;
 245                 case 'R':
 246                         Rflag = 1;
 247                         break;
 248                 default:
 249                         usage();
 250                 }
 251
 252         argc -= optind;
 253         argv += optind;
 254
 255         if (aflag || cflag) {
 256                 dump(0);
 257                 exit(0);
 258         }
 259         if (dflag) {
 260                 if (argc != 1)
 261                         usage();
 262                 delete(argv[0]);
 263                 exit(0);
 264         }
 265         if (pflag) {
 266                 plist();
 267                 exit(0);
 268         }
 269         if (rflag) {
 270                 rtrlist();
 271                 exit(0);
 272         }
 273         if (sflag) {
 274                 if (argc < 2 || argc > 4)
 275                         usage();
 276                 exit(set(argc, argv) ? 1 : 0);
 277         }
 278         if (Hflag) {
 279                 harmonize_rtr();
 280                 exit(0);
 281         }
 282         if (Pflag) {
 283                 pfx_flush();
 284                 exit(0);
 285         }
 286         if (Rflag) {
 287                 rtr_flush();
 288                 exit(0);
 289         }
 290
 291         if (argc != 1)
 292                 usage();
 293         get(argv[0]);
 294         exit(0);
 295 }
 296
 297 /*
 298  * Process a file to set standard ndp entries
 299  */
 300 int
 301 file(char *name)
 302 {
 303         FILE *fp;
 304         int i, retval;
 305         char line[100], arg[5][50], *args[5];
 306
 307         if ((fp = fopen(name, "r")) == NULL) {
 308                 fprintf(stderr, "ndp: cannot open %s\n", name);
 309                 exit(1);
 310         }
 311         args[0] = &arg[0][0];
 312         args[1] = &arg[1][0];
 313         args[2] = &arg[2][0];
 314         args[3] = &arg[3][0];
 315         args[4] = &arg[4][0];
 316         retval = 0;
 317         while(fgets(line, 100, fp) != NULL) {
 318                 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
 319                     arg[3], arg[4]);
 320                 if (i < 2) {
 321                         fprintf(stderr, "ndp: bad line: %s\n", line);
 322                         retval = 1;
 323                         continue;
 324                 }
 325                 if (set(i, args))
 326                         retval = 1;
 327         }
 328         fclose(fp);
 329         return (retval);
 330 }
 331
 332 void
 333 getsocket(void)
 334 {
 335         if (s < 0) {
 336                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 337                 if (s < 0) {
 338                         perror("ndp: socket");
 339                         exit(1);
 340                 }
 341         }
 342 }
 343
 344 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 345 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 346 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 347 int     expire_time, flags, found_entry;
 348 struct  {
 349         struct  rt_msghdr m_rtm;
 350         char    m_space[512];
 351 }       m_rtmsg;
 352
 353 /*
 354  * Set an individual neighbor cache entry
 355  */
 356 int
 357 set(int argc, char **argv)
 358 {
 359         struct sockaddr_in6 *sin = &sin_m;
 360         struct sockaddr_dl *sdl;
 361         struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 362         struct addrinfo hints, *res;
 363         int gai_error;
 364         u_char *ea;
 365         char *host = argv[0], *eaddr = argv[1];
 366
 367         getsocket();
 368         argc -= 2;
 369         argv += 2;
 370         sdl_m = blank_sdl;
 371         sin_m = blank_sin;
 372
 373         bzero(&hints, sizeof(hints));
 374         hints.ai_family = AF_INET6;
 375         gai_error = getaddrinfo(host, NULL, &hints, &res);
 376         if (gai_error) {
 377                 fprintf(stderr, "ndp: %s: %s\n", host,
 378                         gai_strerror(gai_error));
 379                 return 1;
 380         }
 381         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 382 #ifdef __KAME__
 383         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 384                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 385                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 386         }
 387 #endif
 388         ea = (u_char *)LLADDR(&sdl_m);
 389         if (ndp_ether_aton(eaddr, ea) == 0)
 390                 sdl_m.sdl_alen = 6;
 391         flags = expire_time = 0;
 392         while (argc-- > 0) {
 393                 if (strncmp(argv[0], "temp", 4) == 0) {
 394                         struct timeval time;
 395                         gettimeofday(&time, 0);
 396                         expire_time = time.tv_sec + 20 * 60;
 397                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 398                         flags |= RTF_ANNOUNCE;
 399                 argv++;
 400         }
 401         if (rtmsg(RTM_GET) < 0) {
 402                 perror(host);
 403                 return (1);
 404         }
 405         sin = (struct sockaddr_in6 *)(rtm + 1);
 406         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 407         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 408                 if (sdl->sdl_family == AF_LINK &&
 409                     (rtm->rtm_flags & RTF_LLINFO) &&
 410                     !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
 411                 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 412                 case IFT_ISO88024: case IFT_ISO88025:
 413                         goto overwrite;
 414                 }
 415                 /*
 416                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 417                  */
 418                 fprintf(stderr, "set: cannot configure a new entry\n");
 419                 return 1;
 420         }
 421
 422 overwrite:
 423         if (sdl->sdl_family != AF_LINK) {
 424                 printf("cannot intuit interface index and type for %s\n", host);
 425                 return (1);
 426         }
 427         sdl_m.sdl_type = sdl->sdl_type;
 428         sdl_m.sdl_index = sdl->sdl_index;
 429         return (rtmsg(RTM_ADD));
 430 }
 431
 432 /*
 433  * Display an individual neighbor cache entry
 434  */
 435 void
 436 get(char *host)
 437 {
 438         struct sockaddr_in6 *sin = &sin_m;
 439         struct addrinfo hints, *res;
 440         int gai_error;
 441
 442         sin_m = blank_sin;
 443         bzero(&hints, sizeof(hints));
 444         hints.ai_family = AF_INET6;
 445         gai_error = getaddrinfo(host, NULL, &hints, &res);
 446         if (gai_error) {
 447                 fprintf(stderr, "ndp: %s: %s\n", host,
 448                         gai_strerror(gai_error));
 449                 return;
 450         }
 451         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 452 #ifdef __KAME__
 453         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 454                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 455                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 456         }
 457 #endif
 458         dump(&sin->sin6_addr);
 459         if (found_entry == 0) {
 460                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 461                             sizeof(host_buf), NULL ,0,
 462                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 463                 printf("%s (%s) -- no entry\n", host, host_buf);
 464                 exit(1);
 465         }
 466 }
 467
 468 /*
 469  * Delete a neighbor cache entry
 470  */
 471 int
 472 delete(char *host)
 473 {
 474         struct sockaddr_in6 *sin = &sin_m;
 475         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 476         struct sockaddr_dl *sdl;
 477         struct addrinfo hints, *res;
 478         int gai_error;
 479
 480         getsocket();
 481         sin_m = blank_sin;
 482
 483         bzero(&hints, sizeof(hints));
 484         hints.ai_family = AF_INET6;
 485         gai_error = getaddrinfo(host, NULL, &hints, &res);
 486         if (gai_error) {
 487                 fprintf(stderr, "ndp: %s: %s\n", host,
 488                         gai_strerror(gai_error));
 489                 return 1;
 490         }
 491         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 492 #ifdef __KAME__
 493         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 494                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 495                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 496         }
 497 #endif
 498         if (rtmsg(RTM_GET) < 0) {
 499                 perror(host);
 500                 return (1);
 501         }
 502         sin = (struct sockaddr_in6 *)(rtm + 1);
 503         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 504         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 505                 if (sdl->sdl_family == AF_LINK &&
 506                     (rtm->rtm_flags & RTF_LLINFO) &&
 507                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 508                         goto delete;
 509                 }
 510                 /*
 511                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 512                  */
 513                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 514                 return 1;
 515         }
 516
 517 delete:
 518         if (sdl->sdl_family != AF_LINK) {
 519                 printf("cannot locate %s\n", host);
 520                 return (1);
 521         }
 522         if (rtmsg(RTM_DELETE) == 0) {
 523                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 524
 525 #ifdef __KAME__
 526                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 527                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 528                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 529                 }
 530 #endif
 531                 getnameinfo((struct sockaddr *)&s6,
 532                             s6.sin6_len, host_buf,
 533                             sizeof(host_buf), NULL, 0,
 534                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 535                 printf("%s (%s) deleted\n", host, host_buf);
 536         }
 537
 538         return 0;
 539 }
 540
 541 #define W_ADDR  31
 542 #define W_LL    17
 543 #define W_IF    6
 544
 545 /*
 546  * Dump the entire neighbor cache
 547  */
 548 void
 549 dump(struct in6_addr *addr)
 550 {
 551         int mib[6];
 552         size_t needed;
 553         char *lim, *buf, *next;
 554         struct rt_msghdr *rtm;
 555         struct sockaddr_in6 *sin;
 556         struct sockaddr_dl *sdl;
 557         extern int h_errno;
 558         struct in6_nbrinfo *nbi;
 559         struct timeval time;
 560         int addrwidth;
 561         int llwidth;
 562         int ifwidth;
 563         char flgbuf[8];
 564         char *ifname;
 565
 566         /* Print header */
 567         if (!tflag && !cflag)
 568                 printf("%-*.*s %-*.*s %*.*s %-9.9s %2s %4s %4s\n",
 569                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 570                     W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs");
 571
 572 again:;
 573         mib[0] = CTL_NET;
 574         mib[1] = PF_ROUTE;
 575         mib[2] = 0;
 576         mib[3] = AF_INET6;
 577         mib[4] = NET_RT_FLAGS;
 578         mib[5] = RTF_LLINFO;
 579         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 580                 err(1, "sysctl(PF_ROUTE estimate)");
 581         if (needed > 0) {
 582                 if ((buf = malloc(needed)) == NULL)
 583                         errx(1, "malloc");
 584                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 585                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 586                 lim = buf + needed;
 587         } else
 588                 buf = lim = NULL;
 589
 590         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 591                 int isrouter = 0, prbs = 0;
 592
 593                 rtm = (struct rt_msghdr *)next;
 594                 sin = (struct sockaddr_in6 *)(rtm + 1);
 595                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 596
 597                 /*
 598                  * Some OSes can produce a route that has the LINK flag but
 599                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 600                  * and BSD/OS, where xx is not the interface identifier on
 601                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 602                  * so we skip them.
 603                  * XXX: such routes should have the GATEWAY flag, not the
 604                  * LINK flag.  However, there are rotten routing software
 605                  * that advertises all routes that have the GATEWAY flag.
 606                  * Thus, KAME kernel intentionally does not set the LINK flag.
 607                  * What is to be fixed is not ndp, but such routing software
 608                  * (and the kernel workaround)...
 609                  */
 610                 if (sdl->sdl_family != AF_LINK)
 611                         continue;
 612
 613                 if (addr) {
 614                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 615                                 continue;
 616                         found_entry = 1;
 617                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 618                         continue;
 619                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 620                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 621                         /* XXX: should scope id be filled in the kernel? */
 622                         if (sin->sin6_scope_id == 0)
 623                                 sin->sin6_scope_id = sdl->sdl_index;
 624 #ifdef __KAME__
 625                         /* KAME specific hack; removed the embedded id */
 626                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 627 #endif
 628                 }
 629                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 630                             sizeof(host_buf), NULL, 0,
 631                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 632                 if (cflag == 1) {
 633 #ifdef RTF_WASCLONED
 634                         if (rtm->rtm_flags & RTF_WASCLONED)
 635                                 delete(host_buf);
 636 #else
 637                         delete(host_buf);
 638 #endif
 639                         continue;
 640                 }
 641                 gettimeofday(&time, 0);
 642                 if (tflag)
 643                         ts_print(&time);
 644
 645                 addrwidth = strlen(host_buf);
 646                 if (addrwidth < W_ADDR)
 647                         addrwidth = W_ADDR;
 648                 llwidth = strlen(ether_str(sdl));
 649                 if (W_ADDR + W_LL - addrwidth > llwidth)
 650                         llwidth = W_ADDR + W_LL - addrwidth;
 651                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 652                 if (!ifname)
 653                         ifname = "?";
 654                 ifwidth = strlen(ifname);
 655                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 656                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 657
 658                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 659                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 660
 661                 /* Print neighbor discovery specific informations */
 662                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 663                 if (nbi) {
 664                         if (nbi->expire > time.tv_sec) {
 665                                 printf(" %-9.9s",
 666                                        sec2str(nbi->expire - time.tv_sec));
 667                         } else if (nbi->expire == 0)
 668                                 printf(" %-9.9s", "permanent");
 669                         else
 670                                 printf(" %-9.9s", "expired");
 671
 672                         switch(nbi->state) {
 673                          case ND6_LLINFO_NOSTATE:
 674                                  printf(" N");
 675                                  break;
 676 #ifdef ND6_LLINFO_WAITDELETE
 677                          case ND6_LLINFO_WAITDELETE:
 678                                  printf(" W");
 679                                  break;
 680 #endif
 681                          case ND6_LLINFO_INCOMPLETE:
 682                                  printf(" I");
 683                                  break;
 684                          case ND6_LLINFO_REACHABLE:
 685                                  printf(" R");
 686                                  break;
 687                          case ND6_LLINFO_STALE:
 688                                  printf(" S");
 689                                  break;
 690                          case ND6_LLINFO_DELAY:
 691                                  printf(" D");
 692                                  break;
 693                          case ND6_LLINFO_PROBE:
 694                                  printf(" P");
 695                                  break;
 696                          default:
 697                                  printf(" ?");
 698                                  break;
 699                         }
 700
 701                         isrouter = nbi->isrouter;
 702                         prbs = nbi->asked;
 703                 } else {
 704                         warnx("failed to get neighbor information");
 705                         printf("  ");
 706                 }
 707                 putchar(' ');
 708
 709                 /*
 710                  * other flags. R: router, P: proxy, W: ??
 711                  */
 712                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 713                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 714                                 isrouter ? "R" : "",
 715                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 716                 } else {
 717                         sin = (struct sockaddr_in6 *)
 718                                 (sdl->sdl_len + (char *)sdl);
 719                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 720                                 isrouter ? "R" : "",
 721                                 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr)
 722                                         ? "P" : "",
 723                                 (sin->sin6_len != sizeof(struct sockaddr_in6))
 724                                         ? "W" : "",
 725                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 726                 }
 727                 printf(" %-4.4s", flgbuf);
 728
 729                 if (prbs)
 730                         printf(" %4d", prbs);
 731
 732                 printf("\n");
 733         }
 734         if (buf != NULL)
 735                 free(buf);
 736
 737         if (repeat) {
 738                 printf("\n");
 739                 sleep(repeat);
 740                 goto again;
 741         }
 742 }
 743
 744 static struct in6_nbrinfo *
 745 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
 746 {
 747         static struct in6_nbrinfo nbi;
 748         int s;
 749
 750         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 751                 err(1, "socket");
 752
 753         bzero(&nbi, sizeof(nbi));
 754         if_indextoname(ifindex, nbi.ifname);
 755         nbi.addr = *addr;
 756         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 757                 if (warning)
 758                         warn("ioctl(SIOCGNBRINFO_IN6)");
 759                 close(s);
 760                 return(NULL);
 761         }
 762
 763         close(s);
 764         return(&nbi);
 765 }
 766
 767 static char *
 768 ether_str(struct sockaddr_dl *sdl)
 769 {
 770         static char ebuf[32];
 771         u_char *cp;
 772
 773         if (sdl->sdl_alen) {
 774                 cp = (u_char *)LLADDR(sdl);
 775                 sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
 776                         cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 777         } else {
 778                 sprintf(ebuf, "(incomplete)");
 779         }
 780
 781         return(ebuf);
 782 }
 783
 784 int
 785 ndp_ether_aton(char *a, u_char *n)
 786 {
 787         int i, o[6];
 788
 789         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 790                                            &o[3], &o[4], &o[5]);
 791         if (i != 6) {
 792                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 793                 return (1);
 794         }
 795         for (i=0; i<6; i++)
 796                 n[i] = o[i];
 797         return (0);
 798 }
 799
 800 void
 801 usage(void)
 802 {
 803         printf("usage: ndp hostname\n");
 804         printf("       ndp -a[nt]\n");
 805         printf("       ndp [-nt] -A wait\n");
 806         printf("       ndp -c[nt]\n");
 807         printf("       ndp -d[nt] hostname\n");
 808         printf("       ndp -f[nt] filename\n");
 809         printf("       ndp -i interface [flags...]\n");
 810 #ifdef SIOCSDEFIFACE_IN6
 811         printf("       ndp -I [interface|delete]\n");
 812 #endif
 813         printf("       ndp -p\n");
 814         printf("       ndp -r\n");
 815         printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
 816         printf("       ndp -H\n");
 817         printf("       ndp -P\n");
 818         printf("       ndp -R\n");
 819         exit(1);
 820 }
 821
 822 int
 823 rtmsg(int cmd)
 824 {
 825         static int seq;
 826         int rlen;
 827         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 828         char *cp = m_rtmsg.m_space;
 829         int l;
 830
 831         errno = 0;
 832         if (cmd == RTM_DELETE)
 833                 goto doit;
 834         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 835         rtm->rtm_flags = flags;
 836         rtm->rtm_version = RTM_VERSION;
 837
 838         switch (cmd) {
 839         default:
 840                 fprintf(stderr, "ndp: internal wrong cmd\n");
 841                 exit(1);
 842         case RTM_ADD:
 843                 rtm->rtm_addrs |= RTA_GATEWAY;
 844                 rtm->rtm_rmx.rmx_expire = expire_time;
 845                 rtm->rtm_inits = RTV_EXPIRE;
 846                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 847                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 848                         rtm->rtm_flags &= ~RTF_HOST;
 849                         rtm->rtm_flags |= RTA_NETMASK;
 850                 }
 851                 /* FALLTHROUGH */
 852         case RTM_GET:
 853                 rtm->rtm_addrs |= RTA_DST;
 854         }
 855 #define NEXTADDR(w, s) \
 856         if (rtm->rtm_addrs & (w)) { \
 857                 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
 858
 859         NEXTADDR(RTA_DST, sin_m);
 860         NEXTADDR(RTA_GATEWAY, sdl_m);
 861         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 862         NEXTADDR(RTA_NETMASK, so_mask);
 863
 864         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 865 doit:
 866         l = rtm->rtm_msglen;
 867         rtm->rtm_seq = ++seq;
 868         rtm->rtm_type = cmd;
 869         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 870                 if (errno != ESRCH || cmd != RTM_DELETE) {
 871                         perror("writing to routing socket");
 872                         return (-1);
 873                 }
 874         }
 875         do {
 876                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 877         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 878         if (l < 0)
 879                 fprintf(stderr, "ndp: read from routing socket: %s\n",
 880                     strerror(errno));
 881         return (0);
 882 }
 883
 884 void
 885 ifinfo(int argc, char **argv)
 886 {
 887         struct in6_ndireq nd;
 888         int i, s;
 889         char *ifname = argv[0];
 890         u_int32_t newflags;
 891 #ifdef IPV6CTL_USETEMPADDR
 892         u_int8_t nullbuf[8];
 893 #endif
 894
 895         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 896                 perror("ndp: socket");
 897                 exit(1);
 898         }
 899         bzero(&nd, sizeof(nd));
 900         strcpy(nd.ifname, ifname);
 901         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 902                 perror("ioctl (SIOCGIFINFO_IN6)");
 903                 exit(1);
 904         }
 905 #define ND nd.ndi
 906         newflags = ND.flags;
 907         for (i = 1; i < argc; i++) {
 908                 int clear = 0;
 909                 char *cp = argv[i];
 910
 911                 if (*cp == '-') {
 912                         clear = 1;
 913                         cp++;
 914                 }
 915
 916 #define SETFLAG(s, f) \
 917         do {\
 918                 if (strcmp(cp, (s)) == 0) {\
 919                         if (clear)\
 920                                 newflags &= ~(f);\
 921                         else\
 922                                 newflags |= (f);\
 923                 }\
 924         } while (0)
 925                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 926
 927                 ND.flags = newflags;
 928                 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
 929                         perror("ioctl(SIOCSIFINFO_FLAGS)");
 930                         exit(1);
 931                 }
 932 #undef SETFLAG
 933         }
 934
 935         printf("linkmtu=%d", ND.linkmtu);
 936         printf(", curhlim=%d", ND.chlim);
 937         printf(", basereachable=%ds%dms",
 938                ND.basereachable / 1000, ND.basereachable % 1000);
 939         printf(", reachable=%ds", ND.reachable);
 940         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
 941 #ifdef IPV6CTL_USETEMPADDR
 942         memset(nullbuf, 0, sizeof(nullbuf));
 943         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
 944                 int j;
 945                 u_int8_t *rbuf;
 946
 947                 for (i = 0; i < 3; i++) {
 948                         switch(i) {
 949                         case 0:
 950                                 printf("\nRandom seed(0): ");
 951                                 rbuf = ND.randomseed0;
 952                                 break;
 953                         case 1:
 954                                 printf("\nRandom seed(1): ");
 955                                 rbuf = ND.randomseed1;
 956                                 break;
 957                         case 2:
 958                                 printf("\nRandom ID:      ");
 959                                 rbuf = ND.randomid;
 960                                 break;
 961                         }
 962                         for (j = 0; j < 8; j++)
 963                                 printf("%02x", rbuf[j]);
 964                 }
 965         }
 966 #endif
 967         if (ND.flags) {
 968                 printf("\nFlags: ");
 969                 if ((ND.flags & ND6_IFF_PERFORMNUD) != 0)
 970                         printf("PERFORMNUD ");
 971         }
 972         putc('\n', stdout);
 973 #undef ND
 974
 975         close(s);
 976 }
 977
 978 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
 979 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
 980 #endif
 981
 982 void
 983 rtrlist(void)
 984 {
 985 #ifdef ICMPV6CTL_ND6_DRLIST
 986         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
 987         char *buf;
 988         struct in6_defrouter *p, *ep;
 989         size_t l;
 990         struct timeval time;
 991
 992         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
 993                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
 994                 /*NOTREACHED*/
 995         }
 996         buf = malloc(l);
 997         if (!buf) {
 998                 errx(1, "not enough core");
 999                 /*NOTREACHED*/
1000         }
1001         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1002                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1003                 /*NOTREACHED*/
1004         }
1005
1006         ep = (struct in6_defrouter *)(buf + l);
1007         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1008                 int rtpref;
1009
1010                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1011                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1012                     NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)) != 0)
1013                         strlcpy(host_buf, "?", sizeof(host_buf));
1014
1015                 printf("%s if=%s", host_buf,
1016                        if_indextoname(p->if_index, ifix_buf));
1017                 printf(", flags=%s%s",
1018                        p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1019                        p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1020                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1021                 printf(", pref=%s", rtpref_str[rtpref]);
1022
1023                 gettimeofday(&time, 0);
1024                 if (p->expire == 0)
1025                         printf(", expire=Never\n");
1026                 else
1027                         printf(", expire=%s\n",
1028                                 sec2str(p->expire - time.tv_sec));
1029         }
1030         free(buf);
1031 #else
1032         struct in6_drlist dr;
1033         int s, i;
1034         struct timeval time;
1035
1036         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1037                 perror("ndp: socket");
1038                 exit(1);
1039         }
1040         bzero(&dr, sizeof(dr));
1041         strcpy(dr.ifname, "lo0"); /* dummy */
1042         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1043                 perror("ioctl (SIOCGDRLST_IN6)");
1044                 exit(1);
1045         }
1046 #define DR dr.defrouter[i]
1047         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1048                 struct sockaddr_in6 sin6;
1049
1050                 bzero(&sin6, sizeof(sin6));
1051                 sin6.sin6_family = AF_INET6;
1052                 sin6.sin6_len = sizeof(sin6);
1053                 sin6.sin6_addr = DR.rtaddr;
1054                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1055                             sizeof(host_buf), NULL, 0,
1056                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1057
1058                 printf("%s if=%s", host_buf,
1059                        if_indextoname(DR.if_index, ifix_buf));
1060                 printf(", flags=%s%s",
1061                        DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1062                        DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1063                 gettimeofday(&time, 0);
1064                 if (DR.expire == 0)
1065                         printf(", expire=Never\n");
1066                 else
1067                         printf(", expire=%s\n",
1068                                 sec2str(DR.expire - time.tv_sec));
1069         }
1070 #undef DR
1071         close(s);
1072 #endif
1073 }
1074
1075 void
1076 plist(void)
1077 {
1078 #ifdef ICMPV6CTL_ND6_PRLIST
1079         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1080         char *buf;
1081         struct in6_prefix *p, *ep, *n;
1082         struct sockaddr_in6 *advrtr;
1083         size_t l;
1084         struct timeval time;
1085 #ifdef NI_WITHSCOPEID
1086         const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
1087         int ninflags = (nflag ? NI_NUMERICHOST : 0) | NI_WITHSCOPEID;
1088 #else
1089         const int niflags = NI_NUMERICHOST;
1090         int ninflags = nflag ? NI_NUMERICHOST : 0;
1091 #endif
1092         char namebuf[NI_MAXHOST];
1093
1094         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1095                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1096                 /*NOTREACHED*/
1097         }
1098         buf = malloc(l);
1099         if (!buf) {
1100                 errx(1, "not enough core");
1101                 /*NOTREACHED*/
1102         }
1103         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1104                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1105                 /*NOTREACHED*/
1106         }
1107
1108         ep = (struct in6_prefix *)(buf + l);
1109         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1110                 advrtr = (struct sockaddr_in6 *)(p + 1);
1111                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1112
1113                 if (getnameinfo((struct sockaddr *)&p->prefix,
1114                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1115                     NULL, 0, niflags) != 0)
1116                         strlcpy(namebuf, "?", sizeof(namebuf));
1117                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1118                        if_indextoname(p->if_index, ifix_buf));
1119
1120                 gettimeofday(&time, 0);
1121                 /*
1122                  * meaning of fields, especially flags, is very different
1123                  * by origin.  notify the difference to the users.
1124                  */
1125                 printf("flags=%s%s%s%s%s",
1126                        p->raflags.onlink ? "L" : "",
1127                        p->raflags.autonomous ? "A" : "",
1128                        (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1129                        (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1130 #ifdef NDPRF_HOME
1131                        (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1132 #else
1133                        ""
1134 #endif
1135                        );
1136                 if (p->vltime == ND6_INFINITE_LIFETIME)
1137                         printf(" vltime=infinity");
1138                 else
1139                         printf(" vltime=%ld", (long)p->vltime);
1140                 if (p->pltime == ND6_INFINITE_LIFETIME)
1141                         printf(", pltime=infinity");
1142                 else
1143                         printf(", pltime=%ld", (long)p->pltime);
1144                 if (p->expire == 0)
1145                         printf(", expire=Never");
1146                 else if (p->expire >= time.tv_sec)
1147                         printf(", expire=%s",
1148                                 sec2str(p->expire - time.tv_sec));
1149                 else
1150                         printf(", expired");
1151                 printf(", ref=%d", p->refcnt);
1152                 printf("\n");
1153                 /*
1154                  * "advertising router" list is meaningful only if the prefix
1155                  * information is from RA.
1156                  */
1157                 if (p->advrtrs) {
1158                         int j;
1159                         struct sockaddr_in6 *sin6;
1160
1161                         sin6 = (struct sockaddr_in6 *)(p + 1);
1162                         printf("  advertised by\n");
1163                         for (j = 0; j < p->advrtrs; j++) {
1164                                 struct in6_nbrinfo *nbi;
1165
1166                                 if (getnameinfo((struct sockaddr *)sin6,
1167                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1168                                     NULL, 0, ninflags) != 0)
1169                                         strlcpy(namebuf, "?", sizeof(namebuf));
1170                                 printf("    %s", namebuf);
1171
1172                                 nbi = getnbrinfo(&sin6->sin6_addr, p->if_index,
1173                                                  0);
1174                                 if (nbi) {
1175                                         switch(nbi->state) {
1176                                         case ND6_LLINFO_REACHABLE:
1177                                         case ND6_LLINFO_STALE:
1178                                         case ND6_LLINFO_DELAY:
1179                                         case ND6_LLINFO_PROBE:
1180                                                 printf(" (reachable)\n");
1181                                                 break;
1182                                         default:
1183                                                 printf(" (unreachable)\n");
1184                                         }
1185                                 } else
1186                                         printf(" (no neighbor state)\n");
1187                                 sin6++;
1188                         }
1189                 } else
1190                         printf("  No advertising router\n");
1191         }
1192         free(buf);
1193 #else
1194         struct in6_prlist pr;
1195         int s, i;
1196         struct timeval time;
1197
1198         gettimeofday(&time, 0);
1199
1200         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1201                 perror("ndp: socket");
1202                 exit(1);
1203         }
1204         bzero(&pr, sizeof(pr));
1205         strcpy(pr.ifname, "lo0"); /* dummy */
1206         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1207                 perror("ioctl (SIOCGPRLST_IN6)");
1208                 exit(1);
1209         }
1210 #define PR pr.prefix[i]
1211         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1212                 struct sockaddr_in6 p6;
1213                 char namebuf[NI_MAXHOST];
1214                 int niflags;
1215
1216 #ifdef NDPRF_ONLINK
1217                 p6 = PR.prefix;
1218 #else
1219                 memset(&p6, 0, sizeof(p6));
1220                 p6.sin6_family = AF_INET6;
1221                 p6.sin6_len = sizeof(p6);
1222                 p6.sin6_addr = PR.prefix;
1223 #endif
1224
1225                 /*
1226                  * copy link index to sin6_scope_id field.
1227                  * XXX: KAME specific.
1228                  */
1229                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1230                         u_int16_t linkid;
1231
1232                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1233                                sizeof(linkid));
1234                         linkid = ntohs(linkid);
1235                         p6.sin6_scope_id = linkid;
1236                         p6.sin6_addr.s6_addr[2] = 0;
1237                         p6.sin6_addr.s6_addr[3] = 0;
1238                 }
1239
1240                 niflags = NI_NUMERICHOST;
1241 #ifdef __KAME__
1242                 niflags |= NI_WITHSCOPEID;
1243 #endif
1244                 if (getnameinfo((struct sockaddr *)&p6,
1245                                 sizeof(p6), namebuf, sizeof(namebuf),
1246                                 NULL, 0, niflags)) {
1247                         warnx("getnameinfo failed");
1248                         continue;
1249                 }
1250                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1251                        if_indextoname(PR.if_index, ifix_buf));
1252
1253                 gettimeofday(&time, 0);
1254                 /*
1255                  * meaning of fields, especially flags, is very different
1256                  * by origin.  notify the difference to the users.
1257                  */
1258 #if 0
1259                 printf("  %s",
1260                        PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1261 #endif
1262 #ifdef NDPRF_ONLINK
1263                 printf("flags=%s%s%s%s%s",
1264                        PR.raflags.onlink ? "L" : "",
1265                        PR.raflags.autonomous ? "A" : "",
1266                        (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1267                        (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1268 #ifdef NDPRF_HOME
1269                        (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1270 #else
1271                        ""
1272 #endif
1273                        );
1274 #else
1275                 printf("flags=%s%s",
1276                        PR.raflags.onlink ? "L" : "",
1277                        PR.raflags.autonomous ? "A" : "");
1278 #endif
1279                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1280                         printf(" vltime=infinity");
1281                 else
1282                         printf(" vltime=%ld", (long)PR.vltime);
1283                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1284                         printf(", pltime=infinity");
1285                 else
1286                         printf(", pltime=%ld", (long)PR.pltime);
1287                 if (PR.expire == 0)
1288                         printf(", expire=Never");
1289                 else if (PR.expire >= time.tv_sec)
1290                         printf(", expire=%s",
1291                                 sec2str(PR.expire - time.tv_sec));
1292                 else
1293                         printf(", expired");
1294 #ifdef NDPRF_ONLINK
1295                 printf(", ref=%d", PR.refcnt);
1296 #endif
1297 #if 0
1298                 switch (PR.origin) {
1299                 case PR_ORIG_RA:
1300                         printf(", origin=RA");
1301                         break;
1302                 case PR_ORIG_RR:
1303                         printf(", origin=RR");
1304                         break;
1305                 case PR_ORIG_STATIC:
1306                         printf(", origin=static");
1307                         break;
1308                 case PR_ORIG_KERNEL:
1309                         printf(", origin=kernel");
1310                         break;
1311                 default:
1312                         printf(", origin=?");
1313                         break;
1314                 }
1315 #endif
1316                 printf("\n");
1317                 /*
1318                  * "advertising router" list is meaningful only if the prefix
1319                  * information is from RA.
1320                  */
1321                 if (0 &&        /* prefix origin is almost obsolted */
1322                     PR.origin != PR_ORIG_RA)
1323                         ;
1324                 else if (PR.advrtrs) {
1325                         int j;
1326                         printf("  advertised by\n");
1327                         for (j = 0; j < PR.advrtrs; j++) {
1328                                 struct sockaddr_in6 sin6;
1329                                 struct in6_nbrinfo *nbi;
1330
1331                                 bzero(&sin6, sizeof(sin6));
1332                                 sin6.sin6_family = AF_INET6;
1333                                 sin6.sin6_len = sizeof(sin6);
1334                                 sin6.sin6_addr = PR.advrtr[j];
1335                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1336                                 getnameinfo((struct sockaddr *)&sin6,
1337                                             sin6.sin6_len, host_buf,
1338                                             sizeof(host_buf), NULL, 0,
1339                                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1340                                 printf("    %s", host_buf);
1341
1342                                 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
1343                                                  0);
1344                                 if (nbi) {
1345                                         switch(nbi->state) {
1346                                          case ND6_LLINFO_REACHABLE:
1347                                          case ND6_LLINFO_STALE:
1348                                          case ND6_LLINFO_DELAY:
1349                                          case ND6_LLINFO_PROBE:
1350                                                  printf(" (reachable)\n");
1351                                                  break;
1352                                          default:
1353                                                  printf(" (unreachable)\n");
1354                                         }
1355                                 } else
1356                                         printf(" (no neighbor state)\n");
1357                         }
1358                         if (PR.advrtrs > DRLSTSIZ)
1359                                 printf("    and %d routers\n",
1360                                        PR.advrtrs - DRLSTSIZ);
1361                 } else
1362                         printf("  No advertising router\n");
1363         }
1364 #undef PR
1365         close(s);
1366 #endif
1367 }
1368
1369 void
1370 pfx_flush(void)
1371 {
1372         char dummyif[IFNAMSIZ+8];
1373         int s;
1374
1375         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1376                 err(1, "socket");
1377         strcpy(dummyif, "lo0"); /* dummy */
1378         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1379                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1380 }
1381
1382 void
1383 rtr_flush(void)
1384 {
1385         char dummyif[IFNAMSIZ+8];
1386         int s;
1387
1388         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1389                 err(1, "socket");
1390         strcpy(dummyif, "lo0"); /* dummy */
1391         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1392                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1393
1394         close(s);
1395 }
1396
1397 void
1398 harmonize_rtr(void)
1399 {
1400         char dummyif[IFNAMSIZ+8];
1401         int s;
1402
1403         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1404                 err(1, "socket");
1405         strcpy(dummyif, "lo0"); /* dummy */
1406         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1407                 err(1, "ioctl (SIOCSNDFLUSH_IN6)");
1408
1409         close(s);
1410 }
1411
1412 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1413 static void
1414 setdefif(char *ifname)
1415 {
1416         struct in6_ndifreq ndifreq;
1417         unsigned int ifindex;
1418
1419         if (strcasecmp(ifname, "delete") == 0)
1420                 ifindex = 0;
1421         else {
1422                 if ((ifindex = if_nametoindex(ifname)) == 0)
1423                         err(1, "failed to resolve i/f index for %s", ifname);
1424         }
1425
1426         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1427                 err(1, "socket");
1428
1429         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1430         ndifreq.ifindex = ifindex;
1431
1432         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1433                 err(1, "ioctl (SIOCSDEFIFACE_IN6)");
1434
1435         close(s);
1436 }
1437
1438 static void
1439 getdefif(void)
1440 {
1441         struct in6_ndifreq ndifreq;
1442         char ifname[IFNAMSIZ+8];
1443
1444         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1445                 err(1, "socket");
1446
1447         memset(&ndifreq, 0, sizeof(ndifreq));
1448         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1449
1450         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1451                 err(1, "ioctl (SIOCGDEFIFACE_IN6)");
1452
1453         if (ndifreq.ifindex == 0)
1454                 printf("No default interface.\n");
1455         else {
1456                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1457                         err(1, "failed to resolve ifname for index %lu",
1458                             ndifreq.ifindex);
1459                 printf("ND default interface = %s\n", ifname);
1460         }
1461
1462         close(s);
1463 }
1464 #endif
1465
1466 static char *
1467 sec2str(time_t total)
1468 {
1469         static char result[256];
1470         int days, hours, mins, secs;
1471         int first = 1;
1472         char *p = result;
1473
1474         days = total / 3600 / 24;
1475         hours = (total / 3600) % 24;
1476         mins = (total / 60) % 60;
1477         secs = total % 60;
1478
1479         if (days) {
1480                 first = 0;
1481                 p += sprintf(p, "%dd", days);
1482         }
1483         if (!first || hours) {
1484                 first = 0;
1485                 p += sprintf(p, "%dh", hours);
1486         }
1487         if (!first || mins) {
1488                 first = 0;
1489                 p += sprintf(p, "%dm", mins);
1490         }
1491         sprintf(p, "%ds", secs);
1492
1493         return(result);
1494 }
1495
1496 /*
1497  * Print the timestamp
1498  * from tcpdump/util.c
1499  */
1500 static void
1501 ts_print(const struct timeval *tvp)
1502 {
1503         int s;
1504
1505         /* Default */
1506         s = (tvp->tv_sec + thiszone) % 86400;
1507         printf("%02d:%02d:%02d.%06u ",
1508             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1509 }