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 /*      $KAME: ndp.c,v 1.65 2001/05/08 04:36:34 itojun Exp $    */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 /*
  33  * Copyright (c) 1984, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * Sun Microsystems, Inc.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  */
  63
  64 /*
  65  * Based on:
  66  * "@(#) Copyright (c) 1984, 1993\n\
  67  *      The Regents of the University of California.  All rights reserved.\n";
  68  *
  69  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
  70  */
  71
  72 /*
  73  * ndp - display, set, delete and flush neighbor cache
  74  */
  75
  76
  77 #include <sys/param.h>
  78 #include <sys/file.h>
  79 #include <sys/ioctl.h>
  80 #include <sys/socket.h>
  81 #include <sys/sysctl.h>
  82 #include <sys/time.h>
  83 #include <sys/queue.h>
  84
  85 #include <net/if.h>
  86 #include <net/if_var.h>
  87 #include <net/if_dl.h>
  88 #include <net/if_types.h>
  89 #include <net/route.h>
  90
  91 #include <netinet/in.h>
  92 #include <netinet/if_ether.h>
  93
  94 #include <netinet/icmp6.h>
  95 #include <netinet6/in6_var.h>
  96 #include <netinet6/nd6.h>
  97
  98 #include <arpa/inet.h>
  99
 100 #include <netdb.h>
 101 #include <errno.h>
 102 #include <nlist.h>
 103 #include <stdio.h>
 104 #include <string.h>
 105 #include <paths.h>
 106 #include <err.h>
 107 #include <stdlib.h>
 108 #include <fcntl.h>
 109 #include <unistd.h>
 110 #include "gmt2local.h"
 111
 112 #ifndef NI_WITHSCOPEID
 113 #define NI_WITHSCOPEID  0
 114 #endif
 115
 116 /* packing rule for routing socket */
 117 #define ROUNDUP(a) \
 118         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 119 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 120
 121 static int pid;
 122 static int cflag;
 123 static int nflag;
 124 static int tflag;
 125 static int32_t thiszone;        /* time difference with gmt */
 126 static int s = -1;
 127 static int repeat = 0;
 128
 129 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
 130 char host_buf[NI_MAXHOST];              /* getnameinfo() */
 131 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
 132
 133 int file(char *);
 134 void getsocket(void);
 135 int set(int, char **);
 136 void get(char *);
 137 int delete(char *);
 138 void dump(struct in6_addr *);
 139 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *addr,
 140                                            int ifindex, int);
 141 static char *ether_str(struct sockaddr_dl *);
 142 int ndp_ether_aton(char *, u_char *);
 143 void usage(void);
 144 int rtmsg(int);
 145 void ifinfo(int, char **);
 146 void rtrlist(void);
 147 void plist(void);
 148 void pfx_flush(void);
 149 void rtrlist(void);
 150 void rtr_flush(void);
 151 void harmonize_rtr(void);
 152 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 153 static void getdefif(void);
 154 static void setdefif(char *);
 155 #endif
 156 static char *sec2str(time_t t);
 157 static char *ether_str(struct sockaddr_dl *sdl);
 158 static void ts_print(const struct timeval *);
 159
 160 static char *rtpref_str[] = {
 161         "medium",               /* 00 */
 162         "high",                 /* 01 */
 163         "rsv",                  /* 10 */
 164         "low"                   /* 11 */
 165 };
 166
 167 int
 168 main(int argc, char **argv)
 169 {
 170         int ch;
 171         int aflag = 0, dflag = 0, sflag = 0, Hflag = 0,
 172                 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
 173
 174         pid = getpid();
 175         thiszone = gmt2local(0);
 176         while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != -1)
 177                 switch ((char)ch) {
 178                 case 'a':
 179                         aflag = 1;
 180                         break;
 181                 case 'c':
 182                         cflag = 1;
 183                         break;
 184                 case 'd':
 185                         dflag = 1;
 186                         break;
 187                 case 'I':
 188 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
 189                         if (argc > 2)
 190                                 setdefif(argv[2]);
 191                         getdefif(); /* always call it to print the result */
 192                         exit(0);
 193 #else
 194                         errx(1, "not supported yet");
 195                         /*NOTREACHED*/
 196 #endif
 197                 case 'i' :
 198                         argc -= optind;
 199                         argv += optind;
 200                         if (argc < 1)
 201                                 usage();
 202                         ifinfo(argc, argv);
 203                         exit(0);
 204                 case 'n':
 205                         nflag = 1;
 206                         continue;
 207                 case 'p':
 208                         pflag = 1;
 209                         break;
 210                 case 'f' :
 211                         if (argc != 3)
 212                                 usage();
 213                         file(argv[2]);
 214                         exit(0);
 215                 case 'l' :
 216                         /* obsolete, ignored */
 217                         break;
 218                 case 'r' :
 219                         rflag = 1;
 220                         break;
 221                 case 's':
 222                         sflag = 1;
 223                         break;
 224                 case 't':
 225                         tflag = 1;
 226                         break;
 227                 case 'A':
 228                         aflag = 1;
 229                         repeat = atoi(optarg);
 230                         if (repeat < 0)
 231                                 usage();
 232                         break;
 233                 case 'H' :
 234                         Hflag = 1;
 235                         break;
 236                 case 'P':
 237                         Pflag = 1;
 238                         break;
 239                 case 'R':
 240                         Rflag = 1;
 241                         break;
 242                 default:
 243                         usage();
 244                 }
 245
 246         argc -= optind;
 247         argv += optind;
 248
 249         if (aflag || cflag) {
 250                 dump(0);
 251                 exit(0);
 252         }
 253         if (dflag) {
 254                 if (argc != 1)
 255                         usage();
 256                 delete(argv[0]);
 257                 exit(0);
 258         }
 259         if (pflag) {
 260                 plist();
 261                 exit(0);
 262         }
 263         if (rflag) {
 264                 rtrlist();
 265                 exit(0);
 266         }
 267         if (sflag) {
 268                 if (argc < 2 || argc > 4)
 269                         usage();
 270                 exit(set(argc, argv) ? 1 : 0);
 271         }
 272         if (Hflag) {
 273                 harmonize_rtr();
 274                 exit(0);
 275         }
 276         if (Pflag) {
 277                 pfx_flush();
 278                 exit(0);
 279         }
 280         if (Rflag) {
 281                 rtr_flush();
 282                 exit(0);
 283         }
 284
 285         if (argc != 1)
 286                 usage();
 287         get(argv[0]);
 288         exit(0);
 289 }
 290
 291 /*
 292  * Process a file to set standard ndp entries
 293  */
 294 int
 295 file(char *name)
 296 {
 297         FILE *fp;
 298         int i, retval;
 299         char line[100], arg[5][50], *args[5];
 300
 301         if ((fp = fopen(name, "r")) == NULL) {
 302                 fprintf(stderr, "ndp: cannot open %s\n", name);
 303                 exit(1);
 304         }
 305         args[0] = &arg[0][0];
 306         args[1] = &arg[1][0];
 307         args[2] = &arg[2][0];
 308         args[3] = &arg[3][0];
 309         args[4] = &arg[4][0];
 310         retval = 0;
 311         while(fgets(line, 100, fp) != NULL) {
 312                 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
 313                     arg[3], arg[4]);
 314                 if (i < 2) {
 315                         fprintf(stderr, "ndp: bad line: %s\n", line);
 316                         retval = 1;
 317                         continue;
 318                 }
 319                 if (set(i, args))
 320                         retval = 1;
 321         }
 322         fclose(fp);
 323         return (retval);
 324 }
 325
 326 void
 327 getsocket(void)
 328 {
 329         if (s < 0) {
 330                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 331                 if (s < 0) {
 332                         perror("ndp: socket");
 333                         exit(1);
 334                 }
 335         }
 336 }
 337
 338 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
 339 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
 340 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
 341 int     flags, found_entry;
 342 time_t  expire_time;
 343 struct  {
 344         struct  rt_msghdr m_rtm;
 345         char    m_space[512];
 346 }       m_rtmsg;
 347
 348 /*
 349  * Set an individual neighbor cache entry
 350  */
 351 int
 352 set(int argc, char **argv)
 353 {
 354         struct sockaddr_in6 *sin = &sin_m;
 355         struct sockaddr_dl *sdl;
 356         struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
 357         struct addrinfo hints, *res;
 358         int gai_error;
 359         u_char *ea;
 360         char *host = argv[0], *eaddr = argv[1];
 361
 362         getsocket();
 363         argc -= 2;
 364         argv += 2;
 365         sdl_m = blank_sdl;
 366         sin_m = blank_sin;
 367
 368         bzero(&hints, sizeof(hints));
 369         hints.ai_family = AF_INET6;
 370         gai_error = getaddrinfo(host, NULL, &hints, &res);
 371         if (gai_error) {
 372                 fprintf(stderr, "ndp: %s: %s\n", host,
 373                         gai_strerror(gai_error));
 374                 return 1;
 375         }
 376         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 377 #ifdef __KAME__
 378         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 379                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 380                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 381         }
 382 #endif
 383         ea = (u_char *)LLADDR(&sdl_m);
 384         if (ndp_ether_aton(eaddr, ea) == 0)
 385                 sdl_m.sdl_alen = 6;
 386         flags = 0;
 387         expire_time = 0;
 388         while (argc-- > 0) {
 389                 if (strncmp(argv[0], "temp", 4) == 0) {
 390                         struct timespec sp;
 391
 392                         clock_gettime(CLOCK_MONOTONIC, &sp);
 393                         expire_time = sp.tv_sec + 20 * 60;
 394                 } else if (strncmp(argv[0], "proxy", 5) == 0)
 395                         flags |= RTF_ANNOUNCE;
 396                 argv++;
 397         }
 398         if (rtmsg(RTM_GET) < 0) {
 399                 perror(host);
 400                 return (1);
 401         }
 402         sin = (struct sockaddr_in6 *)(rtm + 1);
 403         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 404         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 405                 if (sdl->sdl_family == AF_LINK &&
 406                     (rtm->rtm_flags & RTF_LLINFO) &&
 407                     !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
 408                 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
 409                 case IFT_ISO88024: case IFT_ISO88025:
 410                         goto overwrite;
 411                 }
 412                 /*
 413                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 414                  */
 415                 fprintf(stderr, "set: cannot configure a new entry\n");
 416                 return 1;
 417         }
 418
 419 overwrite:
 420         if (sdl->sdl_family != AF_LINK) {
 421                 printf("cannot intuit interface index and type for %s\n", host);
 422                 return (1);
 423         }
 424         sdl_m.sdl_type = sdl->sdl_type;
 425         sdl_m.sdl_index = sdl->sdl_index;
 426         return (rtmsg(RTM_ADD));
 427 }
 428
 429 /*
 430  * Display an individual neighbor cache entry
 431  */
 432 void
 433 get(char *host)
 434 {
 435         struct sockaddr_in6 *sin = &sin_m;
 436         struct addrinfo hints, *res;
 437         int gai_error;
 438
 439         sin_m = blank_sin;
 440         bzero(&hints, sizeof(hints));
 441         hints.ai_family = AF_INET6;
 442         gai_error = getaddrinfo(host, NULL, &hints, &res);
 443         if (gai_error) {
 444                 fprintf(stderr, "ndp: %s: %s\n", host,
 445                         gai_strerror(gai_error));
 446                 return;
 447         }
 448         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 449 #ifdef __KAME__
 450         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 451                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 452                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 453         }
 454 #endif
 455         dump(&sin->sin6_addr);
 456         if (found_entry == 0) {
 457                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 458                             sizeof(host_buf), NULL ,0,
 459                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 460                 printf("%s (%s) -- no entry\n", host, host_buf);
 461                 exit(1);
 462         }
 463 }
 464
 465 /*
 466  * Delete a neighbor cache entry
 467  */
 468 int
 469 delete(char *host)
 470 {
 471         struct sockaddr_in6 *sin = &sin_m;
 472         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 473         struct sockaddr_dl *sdl;
 474         struct addrinfo hints, *res;
 475         int gai_error;
 476
 477         getsocket();
 478         sin_m = blank_sin;
 479
 480         bzero(&hints, sizeof(hints));
 481         hints.ai_family = AF_INET6;
 482         gai_error = getaddrinfo(host, NULL, &hints, &res);
 483         if (gai_error) {
 484                 fprintf(stderr, "ndp: %s: %s\n", host,
 485                         gai_strerror(gai_error));
 486                 return 1;
 487         }
 488         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
 489 #ifdef __KAME__
 490         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 491                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
 492                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 493         }
 494 #endif
 495         if (rtmsg(RTM_GET) < 0) {
 496                 perror(host);
 497                 return (1);
 498         }
 499         sin = (struct sockaddr_in6 *)(rtm + 1);
 500         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
 501         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 502                 if (sdl->sdl_family == AF_LINK &&
 503                     (rtm->rtm_flags & RTF_LLINFO) &&
 504                     !(rtm->rtm_flags & RTF_GATEWAY)) {
 505                         goto delete;
 506                 }
 507                 /*
 508                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
 509                  */
 510                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
 511                 return 1;
 512         }
 513
 514 delete:
 515         if (sdl->sdl_family != AF_LINK) {
 516                 printf("cannot locate %s\n", host);
 517                 return (1);
 518         }
 519         if (rtmsg(RTM_DELETE) == 0) {
 520                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
 521
 522 #ifdef __KAME__
 523                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
 524                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
 525                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
 526                 }
 527 #endif
 528                 getnameinfo((struct sockaddr *)&s6,
 529                             s6.sin6_len, host_buf,
 530                             sizeof(host_buf), NULL, 0,
 531                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 532                 printf("%s (%s) deleted\n", host, host_buf);
 533         }
 534
 535         return 0;
 536 }
 537
 538 #define W_ADDR  31
 539 #define W_LL    17
 540 #define W_IF    6
 541
 542 /*
 543  * Dump the entire neighbor cache
 544  */
 545 void
 546 dump(struct in6_addr *addr)
 547 {
 548         int mib[6];
 549         size_t needed;
 550         char *lim, *buf, *next;
 551         struct rt_msghdr *rtm;
 552         struct sockaddr_in6 *sin;
 553         struct sockaddr_dl *sdl;
 554         extern int h_errno;
 555         struct in6_nbrinfo *nbi;
 556         struct timeval time;
 557         int addrwidth;
 558         int llwidth;
 559         int ifwidth;
 560         char flgbuf[8];
 561         char *ifname;
 562
 563         /* Print header */
 564         if (!tflag && !cflag)
 565                 printf("%-*.*s %-*.*s %*.*s %-9.9s %2s %4s %4s\n",
 566                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
 567                     W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs");
 568
 569 again:;
 570         mib[0] = CTL_NET;
 571         mib[1] = PF_ROUTE;
 572         mib[2] = 0;
 573         mib[3] = AF_INET6;
 574         mib[4] = NET_RT_FLAGS;
 575         mib[5] = RTF_LLINFO;
 576         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 577                 err(1, "sysctl(PF_ROUTE estimate)");
 578         if (needed > 0) {
 579                 if ((buf = malloc(needed)) == NULL)
 580                         errx(1, "malloc");
 581                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 582                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
 583                 lim = buf + needed;
 584         } else
 585                 buf = lim = NULL;
 586
 587         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
 588                 int isrouter = 0, prbs = 0;
 589
 590                 rtm = (struct rt_msghdr *)next;
 591                 sin = (struct sockaddr_in6 *)(rtm + 1);
 592                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
 593
 594                 /*
 595                  * Some OSes can produce a route that has the LINK flag but
 596                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
 597                  * and BSD/OS, where xx is not the interface identifier on
 598                  * lo0).  Such routes entry would annoy getnbrinfo() below,
 599                  * so we skip them.
 600                  * XXX: such routes should have the GATEWAY flag, not the
 601                  * LINK flag.  However, there are rotten routing software
 602                  * that advertises all routes that have the GATEWAY flag.
 603                  * Thus, KAME kernel intentionally does not set the LINK flag.
 604                  * What is to be fixed is not ndp, but such routing software
 605                  * (and the kernel workaround)...
 606                  */
 607                 if (sdl->sdl_family != AF_LINK)
 608                         continue;
 609
 610                 if (addr) {
 611                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 612                                 continue;
 613                         found_entry = 1;
 614                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
 615                         continue;
 616                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
 617                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
 618                         /* XXX: should scope id be filled in the kernel? */
 619                         if (sin->sin6_scope_id == 0)
 620                                 sin->sin6_scope_id = sdl->sdl_index;
 621 #ifdef __KAME__
 622                         /* KAME specific hack; removed the embedded id */
 623                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
 624 #endif
 625                 }
 626                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 627                             sizeof(host_buf), NULL, 0,
 628                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
 629                 if (cflag == 1) {
 630 #ifdef RTF_WASCLONED
 631                         if (rtm->rtm_flags & RTF_WASCLONED)
 632                                 delete(host_buf);
 633 #else
 634                         delete(host_buf);
 635 #endif
 636                         continue;
 637                 }
 638                 gettimeofday(&time, 0);
 639                 if (tflag)
 640                         ts_print(&time);
 641
 642                 addrwidth = strlen(host_buf);
 643                 if (addrwidth < W_ADDR)
 644                         addrwidth = W_ADDR;
 645                 llwidth = strlen(ether_str(sdl));
 646                 if (W_ADDR + W_LL - addrwidth > llwidth)
 647                         llwidth = W_ADDR + W_LL - addrwidth;
 648                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
 649                 if (!ifname)
 650                         ifname = "?";
 651                 ifwidth = strlen(ifname);
 652                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
 653                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
 654
 655                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
 656                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
 657
 658                 /* Print neighbor discovery specific informations */
 659                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
 660                 if (nbi) {
 661                         if (nbi->expire > time.tv_sec) {
 662                                 printf(" %-9.9s",
 663                                        sec2str(nbi->expire - time.tv_sec));
 664                         } else if (nbi->expire == 0)
 665                                 printf(" %-9.9s", "permanent");
 666                         else
 667                                 printf(" %-9.9s", "expired");
 668
 669                         switch(nbi->state) {
 670                          case ND6_LLINFO_NOSTATE:
 671                                  printf(" N");
 672                                  break;
 673 #ifdef ND6_LLINFO_WAITDELETE
 674                          case ND6_LLINFO_WAITDELETE:
 675                                  printf(" W");
 676                                  break;
 677 #endif
 678                          case ND6_LLINFO_INCOMPLETE:
 679                                  printf(" I");
 680                                  break;
 681                          case ND6_LLINFO_REACHABLE:
 682                                  printf(" R");
 683                                  break;
 684                          case ND6_LLINFO_STALE:
 685                                  printf(" S");
 686                                  break;
 687                          case ND6_LLINFO_DELAY:
 688                                  printf(" D");
 689                                  break;
 690                          case ND6_LLINFO_PROBE:
 691                                  printf(" P");
 692                                  break;
 693                          default:
 694                                  printf(" ?");
 695                                  break;
 696                         }
 697
 698                         isrouter = nbi->isrouter;
 699                         prbs = nbi->asked;
 700                 } else {
 701                         warnx("failed to get neighbor information");
 702                         printf("  ");
 703                 }
 704                 putchar(' ');
 705
 706                 /*
 707                  * other flags. R: router, P: proxy, W: ??
 708                  */
 709                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
 710                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
 711                                 isrouter ? "R" : "",
 712                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 713                 } else {
 714                         sin = (struct sockaddr_in6 *)
 715                                 (sdl->sdl_len + (char *)sdl);
 716                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 717                                 isrouter ? "R" : "",
 718                                 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr)
 719                                         ? "P" : "",
 720                                 (sin->sin6_len != sizeof(struct sockaddr_in6))
 721                                         ? "W" : "",
 722                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
 723                 }
 724                 printf(" %-4.4s", flgbuf);
 725
 726                 if (prbs)
 727                         printf(" %4d", prbs);
 728
 729                 printf("\n");
 730         }
 731         if (buf != NULL)
 732                 free(buf);
 733
 734         if (repeat) {
 735                 printf("\n");
 736                 sleep(repeat);
 737                 goto again;
 738         }
 739 }
 740
 741 static struct in6_nbrinfo *
 742 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
 743 {
 744         static struct in6_nbrinfo nbi;
 745         int s;
 746
 747         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
 748                 err(1, "socket");
 749
 750         bzero(&nbi, sizeof(nbi));
 751         if_indextoname(ifindex, nbi.ifname);
 752         nbi.addr = *addr;
 753         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
 754                 if (warning)
 755                         warn("ioctl(SIOCGNBRINFO_IN6)");
 756                 close(s);
 757                 return(NULL);
 758         }
 759
 760         close(s);
 761         return(&nbi);
 762 }
 763
 764 static char *
 765 ether_str(struct sockaddr_dl *sdl)
 766 {
 767         static char ebuf[32];
 768         u_char *cp;
 769
 770         if (sdl->sdl_alen) {
 771                 cp = (u_char *)LLADDR(sdl);
 772                 sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
 773                         cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
 774         } else {
 775                 sprintf(ebuf, "(incomplete)");
 776         }
 777
 778         return(ebuf);
 779 }
 780
 781 int
 782 ndp_ether_aton(char *a, u_char *n)
 783 {
 784         int i, o[6];
 785
 786         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
 787                                            &o[3], &o[4], &o[5]);
 788         if (i != 6) {
 789                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
 790                 return (1);
 791         }
 792         for (i=0; i<6; i++)
 793                 n[i] = o[i];
 794         return (0);
 795 }
 796
 797 void
 798 usage(void)
 799 {
 800         printf("usage: ndp hostname\n");
 801         printf("       ndp -a[nt]\n");
 802         printf("       ndp [-nt] -A wait\n");
 803         printf("       ndp -c[nt]\n");
 804         printf("       ndp -d[nt] hostname\n");
 805         printf("       ndp -f[nt] filename\n");
 806         printf("       ndp -i interface [flags...]\n");
 807 #ifdef SIOCSDEFIFACE_IN6
 808         printf("       ndp -I [interface|delete]\n");
 809 #endif
 810         printf("       ndp -p\n");
 811         printf("       ndp -r\n");
 812         printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
 813         printf("       ndp -H\n");
 814         printf("       ndp -P\n");
 815         printf("       ndp -R\n");
 816         exit(1);
 817 }
 818
 819 int
 820 rtmsg(int cmd)
 821 {
 822         static int seq;
 823         int rlen;
 824         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
 825         char *cp = m_rtmsg.m_space;
 826         int l;
 827
 828         errno = 0;
 829         if (cmd == RTM_DELETE)
 830                 goto doit;
 831         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
 832         rtm->rtm_flags = flags;
 833         rtm->rtm_version = RTM_VERSION;
 834
 835         switch (cmd) {
 836         default:
 837                 fprintf(stderr, "ndp: internal wrong cmd\n");
 838                 exit(1);
 839         case RTM_ADD:
 840                 rtm->rtm_addrs |= RTA_GATEWAY;
 841                 rtm->rtm_rmx.rmx_expire = expire_time;
 842                 rtm->rtm_inits = RTV_EXPIRE;
 843                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 844                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 845                         rtm->rtm_flags &= ~RTF_HOST;
 846                         rtm->rtm_flags |= RTA_NETMASK;
 847                 }
 848                 /* FALLTHROUGH */
 849         case RTM_GET:
 850                 rtm->rtm_addrs |= RTA_DST;
 851         }
 852 #define NEXTADDR(w, s) \
 853         if (rtm->rtm_addrs & (w)) { \
 854                 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
 855
 856         NEXTADDR(RTA_DST, sin_m);
 857         NEXTADDR(RTA_GATEWAY, sdl_m);
 858         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
 859         NEXTADDR(RTA_NETMASK, so_mask);
 860
 861         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
 862 doit:
 863         l = rtm->rtm_msglen;
 864         rtm->rtm_seq = ++seq;
 865         rtm->rtm_type = cmd;
 866         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
 867                 if (errno != ESRCH || cmd != RTM_DELETE) {
 868                         perror("writing to routing socket");
 869                         return (-1);
 870                 }
 871         }
 872         do {
 873                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
 874         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
 875         if (l < 0)
 876                 fprintf(stderr, "ndp: read from routing socket: %s\n",
 877                     strerror(errno));
 878         return (0);
 879 }
 880
 881 void
 882 ifinfo(int argc, char **argv)
 883 {
 884         struct in6_ndireq nd;
 885         int i, s;
 886         char *ifname = argv[0];
 887         u_int32_t newflags;
 888 #ifdef IPV6CTL_USETEMPADDR
 889         u_int8_t nullbuf[8];
 890 #endif
 891
 892         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 893                 perror("ndp: socket");
 894                 exit(1);
 895         }
 896         bzero(&nd, sizeof(nd));
 897         strcpy(nd.ifname, ifname);
 898         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 899                 perror("ioctl (SIOCGIFINFO_IN6)");
 900                 exit(1);
 901         }
 902 #define ND nd.ndi
 903         newflags = ND.flags;
 904         for (i = 1; i < argc; i++) {
 905                 int clear = 0;
 906                 char *cp = argv[i];
 907
 908                 if (*cp == '-') {
 909                         clear = 1;
 910                         cp++;
 911                 }
 912
 913 #define SETFLAG(s, f) \
 914         do {\
 915                 if (strcmp(cp, (s)) == 0) {\
 916                         if (clear)\
 917                                 newflags &= ~(f);\
 918                         else\
 919                                 newflags |= (f);\
 920                 }\
 921         } while (0)
 922                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
 923 #ifdef ND6_IFF_ACCEPT_RTADV
 924                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 925 #endif
 926                 ND.flags = newflags;
 927                 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
 928                         perror("ioctl(SIOCSIFINFO_FLAGS)");
 929                         exit(1);
 930                 }
 931 #undef SETFLAG
 932         }
 933
 934         printf("linkmtu=%d", ND.linkmtu);
 935         printf(", curhlim=%d", ND.chlim);
 936         printf(", basereachable=%ds%dms",
 937                ND.basereachable / 1000, ND.basereachable % 1000);
 938         printf(", reachable=%ds", ND.reachable);
 939         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
 940 #ifdef IPV6CTL_USETEMPADDR
 941         memset(nullbuf, 0, sizeof(nullbuf));
 942         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
 943                 int j;
 944                 u_int8_t *rbuf;
 945
 946                 for (i = 0; i < 3; i++) {
 947                         switch(i) {
 948                         case 0:
 949                                 printf("\nRandom seed(0): ");
 950                                 rbuf = ND.randomseed0;
 951                                 break;
 952                         case 1:
 953                                 printf("\nRandom seed(1): ");
 954                                 rbuf = ND.randomseed1;
 955                                 break;
 956                         case 2:
 957                                 printf("\nRandom ID:      ");
 958                                 rbuf = ND.randomid;
 959                                 break;
 960                         }
 961                         for (j = 0; j < 8; j++)
 962                                 printf("%02x", rbuf[j]);
 963                 }
 964         }
 965 #endif
 966         if (ND.flags) {
 967                 printf("\nFlags: ");
 968                 if ((ND.flags & ND6_IFF_PERFORMNUD))
 969                         printf("nud ");
 970 #ifdef ND6_IFF_ACCEPT_RTADV
 971                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
 972                         printf("accept_rtadv ");
 973 #endif
 974         }
 975         putc('\n', stdout);
 976 #undef ND
 977
 978         close(s);
 979 }
 980
 981 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
 982 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
 983 #endif
 984
 985 void
 986 rtrlist(void)
 987 {
 988 #ifdef ICMPV6CTL_ND6_DRLIST
 989         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
 990         char *buf;
 991         struct in6_defrouter *p, *ep;
 992         size_t l;
 993         struct timeval time;
 994
 995         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
 996                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
 997                 /*NOTREACHED*/
 998         }
 999         buf = malloc(l);
1000         if (!buf) {
1001                 errx(1, "not enough core");
1002                 /*NOTREACHED*/
1003         }
1004         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1005                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1006                 /*NOTREACHED*/
1007         }
1008
1009         ep = (struct in6_defrouter *)(buf + l);
1010         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1011                 int rtpref;
1012
1013                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1014                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1015                     NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)) != 0)
1016                         strlcpy(host_buf, "?", sizeof(host_buf));
1017
1018                 printf("%s if=%s", host_buf,
1019                        if_indextoname(p->if_index, ifix_buf));
1020                 printf(", flags=%s%s",
1021                        p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1022                        p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1023                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1024                 printf(", pref=%s", rtpref_str[rtpref]);
1025
1026                 gettimeofday(&time, 0);
1027                 if (p->expire == 0)
1028                         printf(", expire=Never\n");
1029                 else
1030                         printf(", expire=%s\n",
1031                                 sec2str(p->expire - time.tv_sec));
1032         }
1033         free(buf);
1034 #else
1035         struct in6_drlist dr;
1036         int s, i;
1037         struct timeval time;
1038
1039         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1040                 perror("ndp: socket");
1041                 exit(1);
1042         }
1043         bzero(&dr, sizeof(dr));
1044         strcpy(dr.ifname, "lo0"); /* dummy */
1045         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1046                 perror("ioctl (SIOCGDRLST_IN6)");
1047                 exit(1);
1048         }
1049 #define DR dr.defrouter[i]
1050         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1051                 struct sockaddr_in6 sin6;
1052
1053                 bzero(&sin6, sizeof(sin6));
1054                 sin6.sin6_family = AF_INET6;
1055                 sin6.sin6_len = sizeof(sin6);
1056                 sin6.sin6_addr = DR.rtaddr;
1057                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1058                             sizeof(host_buf), NULL, 0,
1059                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1060
1061                 printf("%s if=%s", host_buf,
1062                        if_indextoname(DR.if_index, ifix_buf));
1063                 printf(", flags=%s%s",
1064                        DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1065                        DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1066                 gettimeofday(&time, 0);
1067                 if (DR.expire == 0)
1068                         printf(", expire=Never\n");
1069                 else
1070                         printf(", expire=%s\n",
1071                                 sec2str(DR.expire - time.tv_sec));
1072         }
1073 #undef DR
1074         close(s);
1075 #endif
1076 }
1077
1078 void
1079 plist(void)
1080 {
1081 #ifdef ICMPV6CTL_ND6_PRLIST
1082         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1083         char *buf;
1084         struct in6_prefix *p, *ep, *n;
1085         struct sockaddr_in6 *advrtr;
1086         size_t l;
1087         struct timeval time;
1088 #ifdef NI_WITHSCOPEID
1089         const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
1090         int ninflags = (nflag ? NI_NUMERICHOST : 0) | NI_WITHSCOPEID;
1091 #else
1092         const int niflags = NI_NUMERICHOST;
1093         int ninflags = nflag ? NI_NUMERICHOST : 0;
1094 #endif
1095         char namebuf[NI_MAXHOST];
1096
1097         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1098                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1099                 /*NOTREACHED*/
1100         }
1101         buf = malloc(l);
1102         if (!buf) {
1103                 errx(1, "not enough core");
1104                 /*NOTREACHED*/
1105         }
1106         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1107                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1108                 /*NOTREACHED*/
1109         }
1110
1111         ep = (struct in6_prefix *)(buf + l);
1112         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1113                 advrtr = (struct sockaddr_in6 *)(p + 1);
1114                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1115
1116                 if (getnameinfo((struct sockaddr *)&p->prefix,
1117                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1118                     NULL, 0, niflags) != 0)
1119                         strlcpy(namebuf, "?", sizeof(namebuf));
1120                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1121                        if_indextoname(p->if_index, ifix_buf));
1122
1123                 gettimeofday(&time, 0);
1124                 /*
1125                  * meaning of fields, especially flags, is very different
1126                  * by origin.  notify the difference to the users.
1127                  */
1128                 printf("flags=%s%s%s%s%s",
1129                        p->raflags.onlink ? "L" : "",
1130                        p->raflags.autonomous ? "A" : "",
1131                        (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1132                        (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1133 #ifdef NDPRF_HOME
1134                        (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1135 #else
1136                        ""
1137 #endif
1138                        );
1139                 if (p->vltime == ND6_INFINITE_LIFETIME)
1140                         printf(" vltime=infinity");
1141                 else
1142                         printf(" vltime=%ld", (long)p->vltime);
1143                 if (p->pltime == ND6_INFINITE_LIFETIME)
1144                         printf(", pltime=infinity");
1145                 else
1146                         printf(", pltime=%ld", (long)p->pltime);
1147                 if (p->expire == 0)
1148                         printf(", expire=Never");
1149                 else if (p->expire >= time.tv_sec)
1150                         printf(", expire=%s",
1151                                 sec2str(p->expire - time.tv_sec));
1152                 else
1153                         printf(", expired");
1154                 printf(", ref=%d", p->refcnt);
1155                 printf("\n");
1156                 /*
1157                  * "advertising router" list is meaningful only if the prefix
1158                  * information is from RA.
1159                  */
1160                 if (p->advrtrs) {
1161                         int j;
1162                         struct sockaddr_in6 *sin6;
1163
1164                         sin6 = (struct sockaddr_in6 *)(p + 1);
1165                         printf("  advertised by\n");
1166                         for (j = 0; j < p->advrtrs; j++) {
1167                                 struct in6_nbrinfo *nbi;
1168
1169                                 if (getnameinfo((struct sockaddr *)sin6,
1170                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1171                                     NULL, 0, ninflags) != 0)
1172                                         strlcpy(namebuf, "?", sizeof(namebuf));
1173                                 printf("    %s", namebuf);
1174
1175                                 nbi = getnbrinfo(&sin6->sin6_addr, p->if_index,
1176                                                  0);
1177                                 if (nbi) {
1178                                         switch(nbi->state) {
1179                                         case ND6_LLINFO_REACHABLE:
1180                                         case ND6_LLINFO_STALE:
1181                                         case ND6_LLINFO_DELAY:
1182                                         case ND6_LLINFO_PROBE:
1183                                                 printf(" (reachable)\n");
1184                                                 break;
1185                                         default:
1186                                                 printf(" (unreachable)\n");
1187                                         }
1188                                 } else
1189                                         printf(" (no neighbor state)\n");
1190                                 sin6++;
1191                         }
1192                 } else
1193                         printf("  No advertising router\n");
1194         }
1195         free(buf);
1196 #else
1197         struct in6_prlist pr;
1198         int s, i;
1199         struct timeval time;
1200
1201         gettimeofday(&time, 0);
1202
1203         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1204                 perror("ndp: socket");
1205                 exit(1);
1206         }
1207         bzero(&pr, sizeof(pr));
1208         strcpy(pr.ifname, "lo0"); /* dummy */
1209         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1210                 perror("ioctl (SIOCGPRLST_IN6)");
1211                 exit(1);
1212         }
1213 #define PR pr.prefix[i]
1214         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1215                 struct sockaddr_in6 p6;
1216                 char namebuf[NI_MAXHOST];
1217                 int niflags;
1218
1219 #ifdef NDPRF_ONLINK
1220                 p6 = PR.prefix;
1221 #else
1222                 memset(&p6, 0, sizeof(p6));
1223                 p6.sin6_family = AF_INET6;
1224                 p6.sin6_len = sizeof(p6);
1225                 p6.sin6_addr = PR.prefix;
1226 #endif
1227
1228                 /*
1229                  * copy link index to sin6_scope_id field.
1230                  * XXX: KAME specific.
1231                  */
1232                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1233                         u_int16_t linkid;
1234
1235                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1236                                sizeof(linkid));
1237                         linkid = ntohs(linkid);
1238                         p6.sin6_scope_id = linkid;
1239                         p6.sin6_addr.s6_addr[2] = 0;
1240                         p6.sin6_addr.s6_addr[3] = 0;
1241                 }
1242
1243                 niflags = NI_NUMERICHOST;
1244 #ifdef __KAME__
1245                 niflags |= NI_WITHSCOPEID;
1246 #endif
1247                 if (getnameinfo((struct sockaddr *)&p6,
1248                                 sizeof(p6), namebuf, sizeof(namebuf),
1249                                 NULL, 0, niflags)) {
1250                         warnx("getnameinfo failed");
1251                         continue;
1252                 }
1253                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1254                        if_indextoname(PR.if_index, ifix_buf));
1255
1256                 gettimeofday(&time, 0);
1257                 /*
1258                  * meaning of fields, especially flags, is very different
1259                  * by origin.  notify the difference to the users.
1260                  */
1261 #if 0
1262                 printf("  %s",
1263                        PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1264 #endif
1265 #ifdef NDPRF_ONLINK
1266                 printf("flags=%s%s%s%s%s",
1267                        PR.raflags.onlink ? "L" : "",
1268                        PR.raflags.autonomous ? "A" : "",
1269                        (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1270                        (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1271 #ifdef NDPRF_HOME
1272                        (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1273 #else
1274                        ""
1275 #endif
1276                        );
1277 #else
1278                 printf("flags=%s%s",
1279                        PR.raflags.onlink ? "L" : "",
1280                        PR.raflags.autonomous ? "A" : "");
1281 #endif
1282                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1283                         printf(" vltime=infinity");
1284                 else
1285                         printf(" vltime=%ld", (long)PR.vltime);
1286                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1287                         printf(", pltime=infinity");
1288                 else
1289                         printf(", pltime=%ld", (long)PR.pltime);
1290                 if (PR.expire == 0)
1291                         printf(", expire=Never");
1292                 else if (PR.expire >= time.tv_sec)
1293                         printf(", expire=%s",
1294                                 sec2str(PR.expire - time.tv_sec));
1295                 else
1296                         printf(", expired");
1297 #ifdef NDPRF_ONLINK
1298                 printf(", ref=%d", PR.refcnt);
1299 #endif
1300 #if 0
1301                 switch (PR.origin) {
1302                 case PR_ORIG_RA:
1303                         printf(", origin=RA");
1304                         break;
1305                 case PR_ORIG_RR:
1306                         printf(", origin=RR");
1307                         break;
1308                 case PR_ORIG_STATIC:
1309                         printf(", origin=static");
1310                         break;
1311                 case PR_ORIG_KERNEL:
1312                         printf(", origin=kernel");
1313                         break;
1314                 default:
1315                         printf(", origin=?");
1316                         break;
1317                 }
1318 #endif
1319                 printf("\n");
1320                 /*
1321                  * "advertising router" list is meaningful only if the prefix
1322                  * information is from RA.
1323                  */
1324                 if (0 &&        /* prefix origin is almost obsolted */
1325                     PR.origin != PR_ORIG_RA)
1326                         ;
1327                 else if (PR.advrtrs) {
1328                         int j;
1329                         printf("  advertised by\n");
1330                         for (j = 0; j < PR.advrtrs; j++) {
1331                                 struct sockaddr_in6 sin6;
1332                                 struct in6_nbrinfo *nbi;
1333
1334                                 bzero(&sin6, sizeof(sin6));
1335                                 sin6.sin6_family = AF_INET6;
1336                                 sin6.sin6_len = sizeof(sin6);
1337                                 sin6.sin6_addr = PR.advrtr[j];
1338                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1339                                 getnameinfo((struct sockaddr *)&sin6,
1340                                             sin6.sin6_len, host_buf,
1341                                             sizeof(host_buf), NULL, 0,
1342                                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1343                                 printf("    %s", host_buf);
1344
1345                                 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
1346                                                  0);
1347                                 if (nbi) {
1348                                         switch(nbi->state) {
1349                                          case ND6_LLINFO_REACHABLE:
1350                                          case ND6_LLINFO_STALE:
1351                                          case ND6_LLINFO_DELAY:
1352                                          case ND6_LLINFO_PROBE:
1353                                                  printf(" (reachable)\n");
1354                                                  break;
1355                                          default:
1356                                                  printf(" (unreachable)\n");
1357                                         }
1358                                 } else
1359                                         printf(" (no neighbor state)\n");
1360                         }
1361                         if (PR.advrtrs > DRLSTSIZ)
1362                                 printf("    and %d routers\n",
1363                                        PR.advrtrs - DRLSTSIZ);
1364                 } else
1365                         printf("  No advertising router\n");
1366         }
1367 #undef PR
1368         close(s);
1369 #endif
1370 }
1371
1372 void
1373 pfx_flush(void)
1374 {
1375         char dummyif[IFNAMSIZ+8];
1376         int s;
1377
1378         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1379                 err(1, "socket");
1380         strcpy(dummyif, "lo0"); /* dummy */
1381         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1382                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1383 }
1384
1385 void
1386 rtr_flush(void)
1387 {
1388         char dummyif[IFNAMSIZ+8];
1389         int s;
1390
1391         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1392                 err(1, "socket");
1393         strcpy(dummyif, "lo0"); /* dummy */
1394         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1395                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1396
1397         close(s);
1398 }
1399
1400 void
1401 harmonize_rtr(void)
1402 {
1403         char dummyif[IFNAMSIZ+8];
1404         int s;
1405
1406         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1407                 err(1, "socket");
1408         strcpy(dummyif, "lo0"); /* dummy */
1409         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1410                 err(1, "ioctl (SIOCSNDFLUSH_IN6)");
1411
1412         close(s);
1413 }
1414
1415 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1416 static void
1417 setdefif(char *ifname)
1418 {
1419         struct in6_ndifreq ndifreq;
1420         unsigned int ifindex;
1421
1422         if (strcasecmp(ifname, "delete") == 0)
1423                 ifindex = 0;
1424         else {
1425                 if ((ifindex = if_nametoindex(ifname)) == 0)
1426                         err(1, "failed to resolve i/f index for %s", ifname);
1427         }
1428
1429         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1430                 err(1, "socket");
1431
1432         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1433         ndifreq.ifindex = ifindex;
1434
1435         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1436                 err(1, "ioctl (SIOCSDEFIFACE_IN6)");
1437
1438         close(s);
1439 }
1440
1441 static void
1442 getdefif(void)
1443 {
1444         struct in6_ndifreq ndifreq;
1445         char ifname[IFNAMSIZ+8];
1446
1447         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1448                 err(1, "socket");
1449
1450         memset(&ndifreq, 0, sizeof(ndifreq));
1451         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1452
1453         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1454                 err(1, "ioctl (SIOCGDEFIFACE_IN6)");
1455
1456         if (ndifreq.ifindex == 0)
1457                 printf("No default interface.\n");
1458         else {
1459                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1460                         err(1, "failed to resolve ifname for index %lu",
1461                             ndifreq.ifindex);
1462                 printf("ND default interface = %s\n", ifname);
1463         }
1464
1465         close(s);
1466 }
1467 #endif
1468
1469 static char *
1470 sec2str(time_t total)
1471 {
1472         static char result[256];
1473         int days, hours, mins, secs;
1474         int first = 1;
1475         char *p = result;
1476
1477         days = total / 3600 / 24;
1478         hours = (total / 3600) % 24;
1479         mins = (total / 60) % 60;
1480         secs = total % 60;
1481
1482         if (days) {
1483                 first = 0;
1484                 p += sprintf(p, "%dd", days);
1485         }
1486         if (!first || hours) {
1487                 first = 0;
1488                 p += sprintf(p, "%dh", hours);
1489         }
1490         if (!first || mins) {
1491                 first = 0;
1492                 p += sprintf(p, "%dm", mins);
1493         }
1494         sprintf(p, "%ds", secs);
1495
1496         return(result);
1497 }
1498
1499 /*
1500  * Print the timestamp
1501  * from tcpdump/util.c
1502  */
1503 static void
1504 ts_print(const struct timeval *tvp)
1505 {
1506         int s;
1507
1508         /* Default */
1509         s = (tvp->tv_sec + thiszone) % 86400;
1510         printf("%02d:%02d:%02d.%06u ",
1511             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1512 }