1 /* $NetBSD: ndp.c,v 1.13 2001/02/08 07:37:18 itojun Exp $ */ 2 /* $KAME: ndp.c,v 1.56 2001/02/08 07:36:45 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. All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by the University of 50 * California, Berkeley and its contributors. 51 * 4. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 /* 69 * Based on: 70 * "@(#) Copyright (c) 1984, 1993\n\ 71 * The Regents of the University of California. All rights reserved.\n"; 72 * 73 * "@(#)arp.c 8.2 (Berkeley) 1/2/94"; 74 */ 75 76 /* 77 * ndp - display, set, delete and flush neighbor cache 78 */ 79 80 81 #include <sys/param.h> 82 #include <sys/file.h> 83 #include <sys/ioctl.h> 84 #include <sys/socket.h> 85 #include <sys/sysctl.h> 86 #include <sys/time.h> 87 #include <sys/queue.h> 88 89 #include <net/if.h> 90 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 91 #include <net/if_var.h> 92 #endif /* __FreeBSD__ >= 3 */ 93 #include <net/if_dl.h> 94 #include <net/if_types.h> 95 #include <net/route.h> 96 97 #include <netinet/in.h> 98 #ifndef __NetBSD__ 99 #include <netinet/if_ether.h> 100 #endif 101 102 #include <netinet/icmp6.h> 103 #include <netinet6/in6_var.h> 104 #include <netinet6/nd6.h> 105 106 #include <arpa/inet.h> 107 108 #include <netdb.h> 109 #include <errno.h> 110 #include <nlist.h> 111 #include <stdio.h> 112 #include <string.h> 113 #include <paths.h> 114 #include <err.h> 115 #include <stdlib.h> 116 #include <fcntl.h> 117 #include <unistd.h> 118 #include "gmt2local.h" 119 120 #ifndef NI_WITHSCOPEID 121 #define NI_WITHSCOPEID 0 122 #endif 123 124 /* packing rule for routing socket */ 125 #define ROUNDUP(a) \ 126 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 127 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 128 129 static int pid; 130 static int cflag; 131 static int nflag; 132 static int tflag; 133 static int32_t thiszone; /* time difference with gmt */ 134 static int s = -1; 135 static int repeat = 0; 136 137 char ntop_buf[INET6_ADDRSTRLEN]; /* inet_ntop() */ 138 char host_buf[NI_MAXHOST]; /* getnameinfo() */ 139 char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 140 141 int main __P((int, char **)); 142 int file __P((char *)); 143 void getsocket __P((void)); 144 int set __P((int, char **)); 145 void get __P((char *)); 146 int delete __P((char *)); 147 void dump __P((struct in6_addr *)); 148 static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *addr, 149 int ifindex, int)); 150 static char *ether_str __P((struct sockaddr_dl *)); 151 int ndp_ether_aton __P((char *, u_char *)); 152 void usage __P((void)); 153 int rtmsg __P((int)); 154 void ifinfo __P((int, char **)); 155 void rtrlist __P((void)); 156 void plist __P((void)); 157 void pfx_flush __P((void)); 158 void rtrlist __P((void)); 159 void rtr_flush __P((void)); 160 void harmonize_rtr __P((void)); 161 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 162 static void getdefif __P((void)); 163 static void setdefif __P((char *)); 164 #endif 165 static char *sec2str __P((time_t t)); 166 static char *ether_str __P((struct sockaddr_dl *sdl)); 167 static void ts_print __P((const struct timeval *)); 168 169 int 170 main(argc, argv) 171 int argc; 172 char **argv; 173 { 174 int ch; 175 int aflag = 0, dflag = 0, sflag = 0, Hflag = 0, 176 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0; 177 178 pid = getpid(); 179 thiszone = gmt2local(0); 180 while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != EOF) 181 switch ((char)ch) { 182 case 'a': 183 aflag = 1; 184 break; 185 case 'c': 186 cflag = 1; 187 break; 188 case 'd': 189 dflag = 1; 190 break; 191 case 'I': 192 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 193 if (argc > 2) 194 setdefif(argv[2]); 195 getdefif(); /* always call it to print the result */ 196 exit(0); 197 #else 198 errx(1, "not supported yet"); 199 /*NOTREACHED*/ 200 #endif 201 case 'i' : 202 argc -= optind; 203 argv += optind; 204 if (argc < 1) 205 usage(); 206 ifinfo(argc, argv); 207 exit(0); 208 case 'n': 209 nflag = 1; 210 continue; 211 case 'p': 212 pflag = 1; 213 break; 214 case 'f' : 215 if (argc != 3) 216 usage(); 217 file(argv[2]); 218 exit(0); 219 case 'l' : 220 /* obsolete, ignored */ 221 break; 222 case 'r' : 223 rflag = 1; 224 break; 225 case 's': 226 sflag = 1; 227 break; 228 case 't': 229 tflag = 1; 230 break; 231 case 'A': 232 aflag = 1; 233 repeat = atoi(optarg); 234 if (repeat < 0) 235 usage(); 236 break; 237 case 'H' : 238 Hflag = 1; 239 break; 240 case 'P': 241 Pflag = 1; 242 break; 243 case 'R': 244 Rflag = 1; 245 break; 246 default: 247 usage(); 248 } 249 250 argc -= optind; 251 argv += optind; 252 253 if (aflag || cflag) { 254 dump(0); 255 exit(0); 256 } 257 if (dflag) { 258 if (argc != 1) 259 usage(); 260 delete(argv[0]); 261 exit(0); 262 } 263 if (pflag) { 264 plist(); 265 exit(0); 266 } 267 if (rflag) { 268 rtrlist(); 269 exit(0); 270 } 271 if (sflag) { 272 if (argc < 2 || argc > 4) 273 usage(); 274 exit(set(argc, argv) ? 1 : 0); 275 } 276 if (Hflag) { 277 harmonize_rtr(); 278 exit(0); 279 } 280 if (Pflag) { 281 pfx_flush(); 282 exit(0); 283 } 284 if (Rflag) { 285 rtr_flush(); 286 exit(0); 287 } 288 289 if (argc != 1) 290 usage(); 291 get(argv[0]); 292 exit(0); 293 } 294 295 /* 296 * Process a file to set standard ndp entries 297 */ 298 int 299 file(name) 300 char *name; 301 { 302 FILE *fp; 303 int i, retval; 304 char line[100], arg[5][50], *args[5]; 305 306 if ((fp = fopen(name, "r")) == NULL) { 307 fprintf(stderr, "ndp: cannot open %s\n", name); 308 exit(1); 309 } 310 args[0] = &arg[0][0]; 311 args[1] = &arg[1][0]; 312 args[2] = &arg[2][0]; 313 args[3] = &arg[3][0]; 314 args[4] = &arg[4][0]; 315 retval = 0; 316 while(fgets(line, 100, fp) != NULL) { 317 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2], 318 arg[3], arg[4]); 319 if (i < 2) { 320 fprintf(stderr, "ndp: bad line: %s\n", line); 321 retval = 1; 322 continue; 323 } 324 if (set(i, args)) 325 retval = 1; 326 } 327 fclose(fp); 328 return (retval); 329 } 330 331 void 332 getsocket() 333 { 334 if (s < 0) { 335 s = socket(PF_ROUTE, SOCK_RAW, 0); 336 if (s < 0) { 337 perror("ndp: socket"); 338 exit(1); 339 } 340 } 341 } 342 343 struct sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 }; 344 struct sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m; 345 struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m; 346 int expire_time, flags, found_entry; 347 struct { 348 struct rt_msghdr m_rtm; 349 char m_space[512]; 350 } m_rtmsg; 351 352 /* 353 * Set an individual neighbor cache entry 354 */ 355 int 356 set(argc, argv) 357 int argc; 358 char **argv; 359 { 360 register struct sockaddr_in6 *sin = &sin_m; 361 register struct sockaddr_dl *sdl; 362 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 363 struct addrinfo hints, *res; 364 int gai_error; 365 u_char *ea; 366 char *host = argv[0], *eaddr = argv[1]; 367 368 getsocket(); 369 argc -= 2; 370 argv += 2; 371 sdl_m = blank_sdl; 372 sin_m = blank_sin; 373 374 bzero(&hints, sizeof(hints)); 375 hints.ai_family = AF_INET6; 376 gai_error = getaddrinfo(host, NULL, &hints, &res); 377 if (gai_error) { 378 fprintf(stderr, "ndp: %s: %s\n", host, 379 gai_strerror(gai_error)); 380 return 1; 381 } 382 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 383 #ifdef __KAME__ 384 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 385 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 386 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 387 } 388 #endif 389 ea = (u_char *)LLADDR(&sdl_m); 390 if (ndp_ether_aton(eaddr, ea) == 0) 391 sdl_m.sdl_alen = 6; 392 flags = expire_time = 0; 393 while (argc-- > 0) { 394 if (strncmp(argv[0], "temp", 4) == 0) { 395 struct timeval time; 396 gettimeofday(&time, 0); 397 expire_time = time.tv_sec + 20 * 60; 398 } else if (strncmp(argv[0], "proxy", 5) == 0) 399 flags |= RTF_ANNOUNCE; 400 argv++; 401 } 402 if (rtmsg(RTM_GET) < 0) { 403 perror(host); 404 return (1); 405 } 406 sin = (struct sockaddr_in6 *)(rtm + 1); 407 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 408 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 409 if (sdl->sdl_family == AF_LINK && 410 (rtm->rtm_flags & RTF_LLINFO) && 411 !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) { 412 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 413 case IFT_ISO88024: case IFT_ISO88025: 414 goto overwrite; 415 } 416 /* 417 * IPv4 arp command retries with sin_other = SIN_PROXY here. 418 */ 419 fprintf(stderr, "set: cannot configure a new entry\n"); 420 return 1; 421 } 422 423 overwrite: 424 if (sdl->sdl_family != AF_LINK) { 425 printf("cannot intuit interface index and type for %s\n", host); 426 return (1); 427 } 428 sdl_m.sdl_type = sdl->sdl_type; 429 sdl_m.sdl_index = sdl->sdl_index; 430 return (rtmsg(RTM_ADD)); 431 } 432 433 /* 434 * Display an individual neighbor cache entry 435 */ 436 void 437 get(host) 438 char *host; 439 { 440 struct sockaddr_in6 *sin = &sin_m; 441 struct addrinfo hints, *res; 442 int gai_error; 443 444 sin_m = blank_sin; 445 bzero(&hints, sizeof(hints)); 446 hints.ai_family = AF_INET6; 447 gai_error = getaddrinfo(host, NULL, &hints, &res); 448 if (gai_error) { 449 fprintf(stderr, "ndp: %s: %s\n", host, 450 gai_strerror(gai_error)); 451 return; 452 } 453 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 454 #ifdef __KAME__ 455 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 456 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 457 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 458 } 459 #endif 460 dump(&sin->sin6_addr); 461 if (found_entry == 0) { 462 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 463 sizeof(host_buf), NULL ,0, 464 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 465 printf("%s (%s) -- no entry\n", host, host_buf); 466 exit(1); 467 } 468 } 469 470 /* 471 * Delete a neighbor cache entry 472 */ 473 int 474 delete(host) 475 char *host; 476 { 477 struct sockaddr_in6 *sin = &sin_m; 478 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 479 struct sockaddr_dl *sdl; 480 struct addrinfo hints, *res; 481 int gai_error; 482 483 getsocket(); 484 sin_m = blank_sin; 485 486 bzero(&hints, sizeof(hints)); 487 hints.ai_family = AF_INET6; 488 gai_error = getaddrinfo(host, NULL, &hints, &res); 489 if (gai_error) { 490 fprintf(stderr, "ndp: %s: %s\n", host, 491 gai_strerror(gai_error)); 492 return 1; 493 } 494 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 495 #ifdef __KAME__ 496 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 497 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 498 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 499 } 500 #endif 501 if (rtmsg(RTM_GET) < 0) { 502 perror(host); 503 return (1); 504 } 505 sin = (struct sockaddr_in6 *)(rtm + 1); 506 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 507 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 508 if (sdl->sdl_family == AF_LINK && 509 (rtm->rtm_flags & RTF_LLINFO) && 510 !(rtm->rtm_flags & RTF_GATEWAY)) { 511 goto delete; 512 } 513 /* 514 * IPv4 arp command retries with sin_other = SIN_PROXY here. 515 */ 516 fprintf(stderr, "delete: cannot delete non-NDP entry\n"); 517 return 1; 518 } 519 520 delete: 521 if (sdl->sdl_family != AF_LINK) { 522 printf("cannot locate %s\n", host); 523 return (1); 524 } 525 if (rtmsg(RTM_DELETE) == 0) { 526 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */ 527 528 #ifdef __KAME__ 529 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) { 530 s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]); 531 *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0; 532 } 533 #endif 534 getnameinfo((struct sockaddr *)&s6, 535 s6.sin6_len, host_buf, 536 sizeof(host_buf), NULL, 0, 537 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 538 printf("%s (%s) deleted\n", host, host_buf); 539 } 540 541 return 0; 542 } 543 544 #define W_ADDR 31 545 #define W_LL 17 546 #define W_IF 6 547 548 /* 549 * Dump the entire neighbor cache 550 */ 551 void 552 dump(addr) 553 struct in6_addr *addr; 554 { 555 int mib[6]; 556 size_t needed; 557 char *lim, *buf, *next; 558 struct rt_msghdr *rtm; 559 struct sockaddr_in6 *sin; 560 struct sockaddr_dl *sdl; 561 extern int h_errno; 562 struct in6_nbrinfo *nbi; 563 struct timeval time; 564 int addrwidth; 565 int llwidth; 566 int ifwidth; 567 char flgbuf[8]; 568 569 /* Print header */ 570 if (!tflag && !cflag) 571 printf("%-*.*s %-*.*s %*.*s %-9.9s %2s %4s %4s\n", 572 W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", 573 W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs"); 574 575 again:; 576 mib[0] = CTL_NET; 577 mib[1] = PF_ROUTE; 578 mib[2] = 0; 579 mib[3] = AF_INET6; 580 mib[4] = NET_RT_FLAGS; 581 mib[5] = RTF_LLINFO; 582 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 583 err(1, "sysctl(PF_ROUTE estimate)"); 584 if (needed > 0) { 585 if ((buf = malloc(needed)) == NULL) 586 errx(1, "malloc"); 587 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 588 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); 589 lim = buf + needed; 590 } else 591 buf = lim = NULL; 592 593 for (next = buf; next && next < lim; next += rtm->rtm_msglen) { 594 int isrouter = 0, prbs = 0; 595 596 rtm = (struct rt_msghdr *)next; 597 sin = (struct sockaddr_in6 *)(rtm + 1); 598 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len)); 599 if (addr) { 600 if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr)) 601 continue; 602 found_entry = 1; 603 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 604 continue; 605 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || 606 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { 607 /* XXX: should scope id be filled in the kernel? */ 608 if (sin->sin6_scope_id == 0) 609 sin->sin6_scope_id = sdl->sdl_index; 610 #ifdef __KAME__ 611 /* KAME specific hack; removed the embedded id */ 612 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0; 613 #endif 614 } 615 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 616 sizeof(host_buf), NULL, 0, 617 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 618 if (cflag == 1) { 619 delete(host_buf); 620 continue; 621 } 622 gettimeofday(&time, 0); 623 if (tflag) 624 ts_print(&time); 625 626 addrwidth = strlen(host_buf); 627 if (addrwidth < W_ADDR) 628 addrwidth = W_ADDR; 629 llwidth = strlen(ether_str(sdl)); 630 if (W_ADDR + W_LL - addrwidth > llwidth) 631 llwidth = W_ADDR + W_LL - addrwidth; 632 ifwidth = strlen(if_indextoname(sdl->sdl_index, 633 ifix_buf)); 634 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) 635 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; 636 637 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, 638 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, 639 if_indextoname(sdl->sdl_index, ifix_buf)); 640 641 /* Print neighbor discovery specific informations */ 642 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1); 643 if (nbi) { 644 if (nbi->expire > time.tv_sec) { 645 printf(" %-9.9s", 646 sec2str(nbi->expire - time.tv_sec)); 647 } else if (nbi->expire == 0) 648 printf(" %-9.9s", "permanent"); 649 else 650 printf(" %-9.9s", "expired"); 651 652 switch(nbi->state) { 653 case ND6_LLINFO_NOSTATE: 654 printf(" N"); 655 break; 656 #ifdef ND6_LLINFO_WAITDELETE 657 case ND6_LLINFO_WAITDELETE: 658 printf(" W"); 659 break; 660 #endif 661 case ND6_LLINFO_INCOMPLETE: 662 printf(" I"); 663 break; 664 case ND6_LLINFO_REACHABLE: 665 printf(" R"); 666 break; 667 case ND6_LLINFO_STALE: 668 printf(" S"); 669 break; 670 case ND6_LLINFO_DELAY: 671 printf(" D"); 672 break; 673 case ND6_LLINFO_PROBE: 674 printf(" P"); 675 break; 676 default: 677 printf(" ?"); 678 break; 679 } 680 681 isrouter = nbi->isrouter; 682 prbs = nbi->asked; 683 } else { 684 warnx("failed to get neighbor information"); 685 printf(" "); 686 } 687 putchar(' '); 688 689 /* 690 * other flags. R: router, P: proxy, W: ?? 691 */ 692 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 693 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 694 isrouter ? "R" : "", 695 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 696 } else { 697 sin = (struct sockaddr_in6 *) 698 (sdl->sdl_len + (char *)sdl); 699 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 700 isrouter ? "R" : "", 701 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) 702 ? "P" : "", 703 (sin->sin6_len != sizeof(struct sockaddr_in6)) 704 ? "W" : "", 705 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 706 } 707 printf(" %-4.4s", flgbuf); 708 709 if (prbs) 710 printf(" %4d", prbs); 711 712 printf("\n"); 713 } 714 if (buf != NULL) 715 free(buf); 716 717 if (repeat) { 718 printf("\n"); 719 sleep(repeat); 720 goto again; 721 } 722 } 723 724 static struct in6_nbrinfo * 725 getnbrinfo(addr, ifindex, warning) 726 struct in6_addr *addr; 727 int ifindex; 728 int warning; 729 { 730 static struct in6_nbrinfo nbi; 731 int s; 732 733 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 734 err(1, "socket"); 735 736 bzero(&nbi, sizeof(nbi)); 737 if_indextoname(ifindex, nbi.ifname); 738 nbi.addr = *addr; 739 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 740 if (warning) 741 warn("ioctl(SIOCGNBRINFO_IN6)"); 742 close(s); 743 return(NULL); 744 } 745 746 close(s); 747 return(&nbi); 748 } 749 750 static char * 751 ether_str(sdl) 752 struct sockaddr_dl *sdl; 753 { 754 static char ebuf[32]; 755 u_char *cp; 756 757 if (sdl->sdl_alen) { 758 cp = (u_char *)LLADDR(sdl); 759 sprintf(ebuf, "%x:%x:%x:%x:%x:%x", 760 cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); 761 } else { 762 sprintf(ebuf, "(incomplete)"); 763 } 764 765 return(ebuf); 766 } 767 768 int 769 ndp_ether_aton(a, n) 770 char *a; 771 u_char *n; 772 { 773 int i, o[6]; 774 775 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 776 &o[3], &o[4], &o[5]); 777 if (i != 6) { 778 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 779 return (1); 780 } 781 for (i=0; i<6; i++) 782 n[i] = o[i]; 783 return (0); 784 } 785 786 void 787 usage() 788 { 789 printf("usage: ndp hostname\n"); 790 printf(" ndp -a[nt]\n"); 791 printf(" ndp [-nt] -A wait\n"); 792 printf(" ndp -c[nt]\n"); 793 printf(" ndp -d[nt] hostname\n"); 794 printf(" ndp -f[nt] filename\n"); 795 printf(" ndp -i interface [flags...]\n"); 796 #ifdef SIOCSDEFIFACE_IN6 797 printf(" ndp -I [interface|delete]\n"); 798 #endif 799 printf(" ndp -p\n"); 800 printf(" ndp -r\n"); 801 printf(" ndp -s hostname ether_addr [temp] [proxy]\n"); 802 printf(" ndp -H\n"); 803 printf(" ndp -P\n"); 804 printf(" ndp -R\n"); 805 exit(1); 806 } 807 808 int 809 rtmsg(cmd) 810 int cmd; 811 { 812 static int seq; 813 int rlen; 814 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 815 register char *cp = m_rtmsg.m_space; 816 register int l; 817 818 errno = 0; 819 if (cmd == RTM_DELETE) 820 goto doit; 821 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 822 rtm->rtm_flags = flags; 823 rtm->rtm_version = RTM_VERSION; 824 825 switch (cmd) { 826 default: 827 fprintf(stderr, "ndp: internal wrong cmd\n"); 828 exit(1); 829 case RTM_ADD: 830 rtm->rtm_addrs |= RTA_GATEWAY; 831 rtm->rtm_rmx.rmx_expire = expire_time; 832 rtm->rtm_inits = RTV_EXPIRE; 833 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC); 834 if (rtm->rtm_flags & RTF_ANNOUNCE) { 835 rtm->rtm_flags &= ~RTF_HOST; 836 rtm->rtm_flags |= RTA_NETMASK; 837 } 838 /* FALLTHROUGH */ 839 case RTM_GET: 840 rtm->rtm_addrs |= RTA_DST; 841 } 842 #define NEXTADDR(w, s) \ 843 if (rtm->rtm_addrs & (w)) { \ 844 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);} 845 846 NEXTADDR(RTA_DST, sin_m); 847 NEXTADDR(RTA_GATEWAY, sdl_m); 848 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 849 NEXTADDR(RTA_NETMASK, so_mask); 850 851 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 852 doit: 853 l = rtm->rtm_msglen; 854 rtm->rtm_seq = ++seq; 855 rtm->rtm_type = cmd; 856 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 857 if (errno != ESRCH || cmd != RTM_DELETE) { 858 perror("writing to routing socket"); 859 return (-1); 860 } 861 } 862 do { 863 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 864 } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 865 if (l < 0) 866 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 867 strerror(errno)); 868 return (0); 869 } 870 871 void 872 ifinfo(argc, argv) 873 int argc; 874 char **argv; 875 { 876 struct in6_ndireq nd; 877 int i, s; 878 char *ifname = argv[0]; 879 u_int32_t newflags; 880 #ifdef IPV6CTL_USETEMPADDR 881 u_int8_t nullbuf[8]; 882 #endif 883 884 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 885 perror("ndp: socket"); 886 exit(1); 887 } 888 bzero(&nd, sizeof(nd)); 889 strcpy(nd.ifname, ifname); 890 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 891 perror("ioctl (SIOCGIFINFO_IN6)"); 892 exit(1); 893 } 894 #define ND nd.ndi 895 newflags = ND.flags; 896 for (i = 1; i < argc; i++) { 897 int clear = 0; 898 char *cp = argv[i]; 899 900 if (*cp == '-') { 901 clear = 1; 902 cp++; 903 } 904 905 #define SETFLAG(s, f) \ 906 do {\ 907 if (strcmp(cp, (s)) == 0) {\ 908 if (clear)\ 909 newflags &= ~(f);\ 910 else\ 911 newflags |= (f);\ 912 }\ 913 } while (0) 914 SETFLAG("nud", ND6_IFF_PERFORMNUD); 915 916 ND.flags = newflags; 917 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) { 918 perror("ioctl(SIOCSIFINFO_FLAGS)"); 919 exit(1); 920 } 921 #undef SETFLAG 922 } 923 924 printf("linkmtu=%d", ND.linkmtu); 925 printf(", curhlim=%d", ND.chlim); 926 printf(", basereachable=%ds%dms", 927 ND.basereachable / 1000, ND.basereachable % 1000); 928 printf(", reachable=%ds", ND.reachable); 929 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); 930 #ifdef IPV6CTL_USETEMPADDR 931 memset(nullbuf, 0, sizeof(nullbuf)); 932 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) { 933 int j; 934 u_int8_t *rbuf; 935 936 for (i = 0; i < 3; i++) { 937 switch(i) { 938 case 0: 939 printf("\nRandom seed(0): "); 940 rbuf = ND.randomseed0; 941 break; 942 case 1: 943 printf("\nRandom seed(1): "); 944 rbuf = ND.randomseed1; 945 break; 946 case 2: 947 printf("\nRandom ID: "); 948 rbuf = ND.randomid; 949 break; 950 } 951 for (j = 0; j < 8; j++) 952 printf("%02x", rbuf[j]); 953 } 954 } 955 #endif 956 if (ND.flags) { 957 printf("\nFlags: "); 958 if ((ND.flags & ND6_IFF_PERFORMNUD) != 0) 959 printf("PERFORMNUD "); 960 } 961 putc('\n', stdout); 962 #undef ND 963 964 close(s); 965 } 966 967 void 968 rtrlist() 969 { 970 struct in6_drlist dr; 971 int s, i; 972 struct timeval time; 973 974 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 975 perror("ndp: socket"); 976 exit(1); 977 } 978 bzero(&dr, sizeof(dr)); 979 strcpy(dr.ifname, "lo0"); /* dummy */ 980 if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) { 981 perror("ioctl (SIOCGDRLST_IN6)"); 982 exit(1); 983 } 984 #define DR dr.defrouter[i] 985 for (i = 0 ; DR.if_index && i < PRLSTSIZ ; i++) { 986 struct sockaddr_in6 sin6; 987 988 bzero(&sin6, sizeof(sin6)); 989 sin6.sin6_family = AF_INET6; 990 sin6.sin6_len = sizeof(sin6); 991 sin6.sin6_addr = DR.rtaddr; 992 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf, 993 sizeof(host_buf), NULL, 0, 994 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 995 996 printf("%s if=%s", host_buf, 997 if_indextoname(DR.if_index, ifix_buf)); 998 printf(", flags=%s%s", 999 DR.flags & ND_RA_FLAG_MANAGED ? "M" : "", 1000 DR.flags & ND_RA_FLAG_OTHER ? "O" : ""); 1001 gettimeofday(&time, 0); 1002 if (DR.expire == 0) 1003 printf(", expire=Never\n"); 1004 else 1005 printf(", expire=%s\n", 1006 sec2str(DR.expire - time.tv_sec)); 1007 } 1008 #undef DR 1009 close(s); 1010 } 1011 1012 void 1013 plist() 1014 { 1015 struct in6_prlist pr; 1016 int s, i; 1017 struct timeval time; 1018 1019 gettimeofday(&time, 0); 1020 1021 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 1022 perror("ndp: socket"); 1023 exit(1); 1024 } 1025 bzero(&pr, sizeof(pr)); 1026 strcpy(pr.ifname, "lo0"); /* dummy */ 1027 if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) { 1028 perror("ioctl (SIOCGPRLST_IN6)"); 1029 exit(1); 1030 } 1031 #define PR pr.prefix[i] 1032 for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) { 1033 struct sockaddr_in6 p6; 1034 char namebuf[NI_MAXHOST]; 1035 int niflags; 1036 1037 #ifdef NDPRF_ONLINK 1038 p6 = PR.prefix; 1039 #else 1040 memset(&p6, 0, sizeof(p6)); 1041 p6.sin6_family = AF_INET6; 1042 p6.sin6_len = sizeof(p6); 1043 p6.sin6_addr = PR.prefix; 1044 #endif 1045 1046 /* 1047 * copy link index to sin6_scope_id field. 1048 * XXX: KAME specific. 1049 */ 1050 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) { 1051 u_int16_t linkid; 1052 1053 memcpy(&linkid, &p6.sin6_addr.s6_addr[2], 1054 sizeof(linkid)); 1055 linkid = ntohs(linkid); 1056 p6.sin6_scope_id = linkid; 1057 p6.sin6_addr.s6_addr[2] = 0; 1058 p6.sin6_addr.s6_addr[3] = 0; 1059 } 1060 1061 niflags = NI_NUMERICHOST; 1062 #ifdef __KAME__ 1063 niflags |= NI_WITHSCOPEID; 1064 #endif 1065 if (getnameinfo((struct sockaddr *)&p6, 1066 sizeof(p6), namebuf, sizeof(namebuf), 1067 NULL, 0, niflags)) { 1068 warnx("getnameinfo failed"); 1069 continue; 1070 } 1071 printf("%s/%d if=%s\n", namebuf, PR.prefixlen, 1072 if_indextoname(PR.if_index, ifix_buf)); 1073 1074 gettimeofday(&time, 0); 1075 /* 1076 * meaning of fields, especially flags, is very different 1077 * by origin. notify the difference to the users. 1078 */ 1079 printf(" %s", PR.origin == PR_ORIG_RA ? "" : "advertise: "); 1080 #ifdef NDPRF_ONLINK 1081 printf("flags=%s%s%s%s", 1082 PR.raflags.onlink ? "L" : "", 1083 PR.raflags.autonomous ? "A" : "", 1084 (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "", 1085 (PR.flags & NDPRF_DETACHED) != 0 ? "D" : ""); 1086 #else 1087 printf("flags=%s%s", 1088 PR.raflags.onlink ? "L" : "", 1089 PR.raflags.autonomous ? "A" : ""); 1090 #endif 1091 if (PR.vltime == ND6_INFINITE_LIFETIME) 1092 printf(" vltime=infinity"); 1093 else 1094 printf(" vltime=%ld", (long)PR.vltime); 1095 if (PR.pltime == ND6_INFINITE_LIFETIME) 1096 printf(", pltime=infinity"); 1097 else 1098 printf(", pltime=%ld", (long)PR.pltime); 1099 if (PR.expire == 0) 1100 printf(", expire=Never"); 1101 else if (PR.expire >= time.tv_sec) 1102 printf(", expire=%s", 1103 sec2str(PR.expire - time.tv_sec)); 1104 else 1105 printf(", expired"); 1106 #ifdef NDPRF_ONLINK 1107 printf(", ref=%d", PR.refcnt); 1108 #endif 1109 switch (PR.origin) { 1110 case PR_ORIG_RA: 1111 printf(", origin=RA"); 1112 break; 1113 case PR_ORIG_RR: 1114 printf(", origin=RR"); 1115 break; 1116 case PR_ORIG_STATIC: 1117 printf(", origin=static"); 1118 break; 1119 case PR_ORIG_KERNEL: 1120 printf(", origin=kernel"); 1121 break; 1122 default: 1123 printf(", origin=?"); 1124 break; 1125 } 1126 printf("\n"); 1127 /* 1128 * "advertising router" list is meaningful only if the prefix 1129 * information is from RA. 1130 */ 1131 if (PR.origin != PR_ORIG_RA) 1132 ; 1133 else if (PR.advrtrs) { 1134 int j; 1135 printf(" advertised by\n"); 1136 for (j = 0; j < PR.advrtrs; j++) { 1137 struct sockaddr_in6 sin6; 1138 struct in6_nbrinfo *nbi; 1139 1140 bzero(&sin6, sizeof(sin6)); 1141 sin6.sin6_family = AF_INET6; 1142 sin6.sin6_len = sizeof(sin6); 1143 sin6.sin6_addr = PR.advrtr[j]; 1144 sin6.sin6_scope_id = PR.if_index; /* XXX */ 1145 getnameinfo((struct sockaddr *)&sin6, 1146 sin6.sin6_len, host_buf, 1147 sizeof(host_buf), NULL, 0, 1148 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 1149 printf(" %s", host_buf); 1150 1151 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index, 1152 0); 1153 if (nbi) { 1154 switch(nbi->state) { 1155 case ND6_LLINFO_REACHABLE: 1156 case ND6_LLINFO_STALE: 1157 case ND6_LLINFO_DELAY: 1158 case ND6_LLINFO_PROBE: 1159 printf(" (reachable)\n"); 1160 break; 1161 default: 1162 printf(" (unreachable)\n"); 1163 } 1164 } else 1165 printf(" (no neighbor state)\n"); 1166 } 1167 if (PR.advrtrs > DRLSTSIZ) 1168 printf(" and %d routers\n", 1169 PR.advrtrs - DRLSTSIZ); 1170 } else 1171 printf(" No advertising router\n"); 1172 } 1173 #undef PR 1174 close(s); 1175 } 1176 1177 void 1178 pfx_flush() 1179 { 1180 char dummyif[IFNAMSIZ+8]; 1181 int s; 1182 1183 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1184 err(1, "socket"); 1185 strcpy(dummyif, "lo0"); /* dummy */ 1186 if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 1187 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 1188 } 1189 1190 void 1191 rtr_flush() 1192 { 1193 char dummyif[IFNAMSIZ+8]; 1194 int s; 1195 1196 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1197 err(1, "socket"); 1198 strcpy(dummyif, "lo0"); /* dummy */ 1199 if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 1200 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 1201 1202 close(s); 1203 } 1204 1205 void 1206 harmonize_rtr() 1207 { 1208 char dummyif[IFNAMSIZ+8]; 1209 int s; 1210 1211 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1212 err(1, "socket"); 1213 strcpy(dummyif, "lo0"); /* dummy */ 1214 if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) 1215 err(1, "ioctl (SIOCSNDFLUSH_IN6)"); 1216 1217 close(s); 1218 } 1219 1220 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1221 static void 1222 setdefif(ifname) 1223 char *ifname; 1224 { 1225 struct in6_ndifreq ndifreq; 1226 unsigned int ifindex; 1227 1228 if (strcasecmp(ifname, "delete") == 0) 1229 ifindex = 0; 1230 else { 1231 if ((ifindex = if_nametoindex(ifname)) == 0) 1232 err(1, "failed to resolve i/f index for %s", ifname); 1233 } 1234 1235 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1236 err(1, "socket"); 1237 1238 strcpy(ndifreq.ifname, "lo0"); /* dummy */ 1239 ndifreq.ifindex = ifindex; 1240 1241 if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1242 err(1, "ioctl (SIOCSDEFIFACE_IN6)"); 1243 1244 close(s); 1245 } 1246 1247 static void 1248 getdefif() 1249 { 1250 struct in6_ndifreq ndifreq; 1251 char ifname[IFNAMSIZ+8]; 1252 1253 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1254 err(1, "socket"); 1255 1256 memset(&ndifreq, 0, sizeof(ndifreq)); 1257 strcpy(ndifreq.ifname, "lo0"); /* dummy */ 1258 1259 if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1260 err(1, "ioctl (SIOCGDEFIFACE_IN6)"); 1261 1262 if (ndifreq.ifindex == 0) 1263 printf("No default interface.\n"); 1264 else { 1265 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL) 1266 err(1, "failed to resolve ifname for index %lu", 1267 ndifreq.ifindex); 1268 printf("ND default interface = %s\n", ifname); 1269 } 1270 1271 close(s); 1272 } 1273 #endif 1274 1275 static char * 1276 sec2str(total) 1277 time_t total; 1278 { 1279 static char result[256]; 1280 int days, hours, mins, secs; 1281 int first = 1; 1282 char *p = result; 1283 1284 days = total / 3600 / 24; 1285 hours = (total / 3600) % 24; 1286 mins = (total / 60) % 60; 1287 secs = total % 60; 1288 1289 if (days) { 1290 first = 0; 1291 p += sprintf(p, "%dd", days); 1292 } 1293 if (!first || hours) { 1294 first = 0; 1295 p += sprintf(p, "%dh", hours); 1296 } 1297 if (!first || mins) { 1298 first = 0; 1299 p += sprintf(p, "%dm", mins); 1300 } 1301 sprintf(p, "%ds", secs); 1302 1303 return(result); 1304 } 1305 1306 /* 1307 * Print the timestamp 1308 * from tcpdump/util.c 1309 */ 1310 static void 1311 ts_print(tvp) 1312 const struct timeval *tvp; 1313 { 1314 int s; 1315 1316 /* Default */ 1317 s = (tvp->tv_sec + thiszone) % 86400; 1318 (void)printf("%02d:%02d:%02d.%06u ", 1319 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); 1320 } 1321