ndp.c revision 1.11
1 /* $NetBSD: ndp.c,v 1.11 2000/10/10 10:14:36 itojun Exp $ */ 2 /* $KAME: ndp.c,v 1.48 2000/10/09 22:08:21 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 static int lflag = 0; 137 138 char ntop_buf[INET6_ADDRSTRLEN]; /* inet_ntop() */ 139 char host_buf[NI_MAXHOST]; /* getnameinfo() */ 140 char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 141 142 int main __P((int, char **)); 143 int file __P((char *)); 144 void getsocket __P((void)); 145 int set __P((int, char **)); 146 void get __P((char *)); 147 int delete __P((char *)); 148 void dump __P((struct in6_addr *)); 149 static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *addr, 150 int ifindex, int)); 151 static char *ether_str __P((struct sockaddr_dl *)); 152 int ndp_ether_aton __P((char *, u_char *)); 153 void usage __P((void)); 154 int rtmsg __P((int)); 155 void ifinfo __P((int, char **)); 156 void rtrlist __P((void)); 157 void plist __P((void)); 158 void pfx_flush __P((void)); 159 void rtrlist __P((void)); 160 void rtr_flush __P((void)); 161 void harmonize_rtr __P((void)); 162 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 163 static void getdefif __P((void)); 164 static void setdefif __P((char *)); 165 #endif 166 static char *sec2str __P((time_t t)); 167 static char *ether_str __P((struct sockaddr_dl *sdl)); 168 static void ts_print __P((const struct timeval *)); 169 170 int 171 main(argc, argv) 172 int argc; 173 char **argv; 174 { 175 int ch; 176 int aflag = 0, dflag = 0, sflag = 0, Hflag = 0, 177 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0; 178 179 pid = getpid(); 180 thiszone = gmt2local(0); 181 while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != EOF) 182 switch ((char)ch) { 183 case 'a': 184 aflag = 1; 185 break; 186 case 'c': 187 cflag = 1; 188 break; 189 case 'd': 190 dflag = 1; 191 break; 192 case 'I': 193 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 194 if (argc > 2) 195 setdefif(argv[2]); 196 getdefif(); /* always call it to print the result */ 197 exit(0); 198 #else 199 errx(1, "not supported yet"); 200 /*NOTREACHED*/ 201 #endif 202 case 'i' : 203 argc -= optind; 204 argv += optind; 205 if (argc < 1) 206 usage(); 207 ifinfo(argc, argv); 208 exit(0); 209 case 'n': 210 nflag = 1; 211 continue; 212 case 'p': 213 pflag = 1; 214 break; 215 case 'f' : 216 if (argc != 3) 217 usage(); 218 file(argv[2]); 219 exit(0); 220 case 'l' : 221 lflag = 1; 222 break; 223 case 'r' : 224 rflag = 1; 225 break; 226 case 's': 227 sflag = 1; 228 break; 229 case 't': 230 tflag = 1; 231 break; 232 case 'A': 233 aflag = 1; 234 repeat = atoi(optarg); 235 if (repeat < 0) 236 usage(); 237 break; 238 case 'H' : 239 Hflag = 1; 240 break; 241 case 'P': 242 Pflag = 1; 243 break; 244 case 'R': 245 Rflag = 1; 246 break; 247 default: 248 usage(); 249 } 250 251 argc -= optind; 252 argv += optind; 253 254 if (aflag || cflag) { 255 dump(0); 256 exit(0); 257 } 258 if (dflag) { 259 if (argc != 1) 260 usage(); 261 delete(argv[0]); 262 exit(0); 263 } 264 if (pflag) { 265 plist(); 266 exit(0); 267 } 268 if (rflag) { 269 rtrlist(); 270 exit(0); 271 } 272 if (sflag) { 273 if (argc < 2 || argc > 4) 274 usage(); 275 exit(set(argc, argv) ? 1 : 0); 276 } 277 if (Hflag) { 278 harmonize_rtr(); 279 exit(0); 280 } 281 if (Pflag) { 282 pfx_flush(); 283 exit(0); 284 } 285 if (Rflag) { 286 rtr_flush(); 287 exit(0); 288 } 289 290 if (argc != 1) 291 usage(); 292 get(argv[0]); 293 exit(0); 294 } 295 296 /* 297 * Process a file to set standard ndp entries 298 */ 299 int 300 file(name) 301 char *name; 302 { 303 FILE *fp; 304 int i, retval; 305 char line[100], arg[5][50], *args[5]; 306 307 if ((fp = fopen(name, "r")) == NULL) { 308 fprintf(stderr, "ndp: cannot open %s\n", name); 309 exit(1); 310 } 311 args[0] = &arg[0][0]; 312 args[1] = &arg[1][0]; 313 args[2] = &arg[2][0]; 314 args[3] = &arg[3][0]; 315 args[4] = &arg[4][0]; 316 retval = 0; 317 while(fgets(line, 100, fp) != NULL) { 318 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2], 319 arg[3], arg[4]); 320 if (i < 2) { 321 fprintf(stderr, "ndp: bad line: %s\n", line); 322 retval = 1; 323 continue; 324 } 325 if (set(i, args)) 326 retval = 1; 327 } 328 fclose(fp); 329 return (retval); 330 } 331 332 void 333 getsocket() 334 { 335 if (s < 0) { 336 s = socket(PF_ROUTE, SOCK_RAW, 0); 337 if (s < 0) { 338 perror("ndp: socket"); 339 exit(1); 340 } 341 } 342 } 343 344 struct sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 }; 345 struct sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m; 346 struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m; 347 int expire_time, flags, found_entry; 348 struct { 349 struct rt_msghdr m_rtm; 350 char m_space[512]; 351 } m_rtmsg; 352 353 /* 354 * Set an individual neighbor cache entry 355 */ 356 int 357 set(argc, argv) 358 int argc; 359 char **argv; 360 { 361 register struct sockaddr_in6 *sin = &sin_m; 362 register struct sockaddr_dl *sdl; 363 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 364 struct addrinfo hints, *res; 365 int gai_error; 366 u_char *ea; 367 char *host = argv[0], *eaddr = argv[1]; 368 369 getsocket(); 370 argc -= 2; 371 argv += 2; 372 sdl_m = blank_sdl; 373 sin_m = blank_sin; 374 375 bzero(&hints, sizeof(hints)); 376 hints.ai_family = AF_INET6; 377 gai_error = getaddrinfo(host, NULL, &hints, &res); 378 if (gai_error) { 379 fprintf(stderr, "ndp: %s: %s\n", host, 380 gai_strerror(gai_error)); 381 return 1; 382 } 383 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 384 #ifdef __KAME__ 385 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 386 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 387 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 388 } 389 #endif 390 ea = (u_char *)LLADDR(&sdl_m); 391 if (ndp_ether_aton(eaddr, ea) == 0) 392 sdl_m.sdl_alen = 6; 393 flags = expire_time = 0; 394 while (argc-- > 0) { 395 if (strncmp(argv[0], "temp", 4) == 0) { 396 struct timeval time; 397 gettimeofday(&time, 0); 398 expire_time = time.tv_sec + 20 * 60; 399 } else if (strncmp(argv[0], "proxy", 5) == 0) 400 flags |= RTF_ANNOUNCE; 401 argv++; 402 } 403 if (rtmsg(RTM_GET) < 0) { 404 perror(host); 405 return (1); 406 } 407 sin = (struct sockaddr_in6 *)(rtm + 1); 408 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 409 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 410 if (sdl->sdl_family == AF_LINK && 411 (rtm->rtm_flags & RTF_LLINFO) && 412 !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) { 413 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 414 case IFT_ISO88024: case IFT_ISO88025: 415 goto overwrite; 416 } 417 /* 418 * IPv4 arp command retries with sin_other = SIN_PROXY here. 419 */ 420 fprintf(stderr, "set: cannot configure a new entry\n"); 421 return 1; 422 } 423 424 overwrite: 425 if (sdl->sdl_family != AF_LINK) { 426 printf("cannot intuit interface index and type for %s\n", host); 427 return (1); 428 } 429 sdl_m.sdl_type = sdl->sdl_type; 430 sdl_m.sdl_index = sdl->sdl_index; 431 return (rtmsg(RTM_ADD)); 432 } 433 434 /* 435 * Display an individual neighbor cache entry 436 */ 437 void 438 get(host) 439 char *host; 440 { 441 struct sockaddr_in6 *sin = &sin_m; 442 struct addrinfo hints, *res; 443 int gai_error; 444 445 sin_m = blank_sin; 446 bzero(&hints, sizeof(hints)); 447 hints.ai_family = AF_INET6; 448 gai_error = getaddrinfo(host, NULL, &hints, &res); 449 if (gai_error) { 450 fprintf(stderr, "ndp: %s: %s\n", host, 451 gai_strerror(gai_error)); 452 return; 453 } 454 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 455 #ifdef __KAME__ 456 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 457 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 458 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 459 } 460 #endif 461 dump(&sin->sin6_addr); 462 if (found_entry == 0) { 463 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 464 sizeof(host_buf), NULL ,0, 465 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 466 printf("%s (%s) -- no entry\n", host, host_buf); 467 exit(1); 468 } 469 } 470 471 /* 472 * Delete a neighbor cache entry 473 */ 474 int 475 delete(host) 476 char *host; 477 { 478 struct sockaddr_in6 *sin = &sin_m; 479 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 480 struct sockaddr_dl *sdl; 481 struct addrinfo hints, *res; 482 int gai_error; 483 484 getsocket(); 485 sin_m = blank_sin; 486 487 bzero(&hints, sizeof(hints)); 488 hints.ai_family = AF_INET6; 489 gai_error = getaddrinfo(host, NULL, &hints, &res); 490 if (gai_error) { 491 fprintf(stderr, "ndp: %s: %s\n", host, 492 gai_strerror(gai_error)); 493 return 1; 494 } 495 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 496 #ifdef __KAME__ 497 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 498 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 499 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 500 } 501 #endif 502 if (rtmsg(RTM_GET) < 0) { 503 perror(host); 504 return (1); 505 } 506 sin = (struct sockaddr_in6 *)(rtm + 1); 507 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 508 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 509 if (sdl->sdl_family == AF_LINK && 510 (rtm->rtm_flags & RTF_LLINFO) && 511 !(rtm->rtm_flags & RTF_GATEWAY)) { 512 switch (sdl->sdl_type) { 513 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 514 case IFT_ISO88024: case IFT_ISO88025: 515 goto delete; 516 } 517 } 518 /* 519 * IPv4 arp command retries with sin_other = SIN_PROXY here. 520 */ 521 fprintf(stderr, "delete: cannot delete non-NDP entry\n"); 522 return 1; 523 } 524 525 delete: 526 if (sdl->sdl_family != AF_LINK) { 527 printf("cannot locate %s\n", host); 528 return (1); 529 } 530 if (rtmsg(RTM_DELETE) == 0) { 531 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */ 532 533 #ifdef __KAME__ 534 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) { 535 s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]); 536 *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0; 537 } 538 #endif 539 getnameinfo((struct sockaddr *)&s6, 540 s6.sin6_len, host_buf, 541 sizeof(host_buf), NULL, 0, 542 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 543 printf("%s (%s) deleted\n", host, host_buf); 544 } 545 546 return 0; 547 } 548 549 /* 550 * Dump the entire neighbor cache 551 */ 552 void 553 dump(addr) 554 struct in6_addr *addr; 555 { 556 int mib[6]; 557 size_t needed; 558 char *lim, *buf, *next; 559 struct rt_msghdr *rtm; 560 struct sockaddr_in6 *sin; 561 struct sockaddr_dl *sdl; 562 extern int h_errno; 563 struct in6_nbrinfo *nbi; 564 struct timeval time; 565 int addrwidth; 566 char flgbuf[8]; 567 568 /* Print header */ 569 if (!tflag && !cflag) 570 printf("%-31.31s %-17.17s %6.6s %-9.9s %2s %4s %4s\n", 571 "Neighbor", "Linklayer Address", "Netif", "Expire", 572 "St", "Flgs", "Prbs"); 573 574 again:; 575 mib[0] = CTL_NET; 576 mib[1] = PF_ROUTE; 577 mib[2] = 0; 578 mib[3] = AF_INET6; 579 mib[4] = NET_RT_FLAGS; 580 mib[5] = RTF_LLINFO; 581 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 582 err(1, "sysctl(PF_ROUTE estimate)"); 583 if (needed > 0) { 584 if ((buf = malloc(needed)) == NULL) 585 errx(1, "malloc"); 586 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 587 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); 588 lim = buf + needed; 589 } else 590 buf = lim = NULL; 591 592 for (next = buf; next && next < lim; next += rtm->rtm_msglen) { 593 int isrouter = 0, prbs = 0; 594 595 rtm = (struct rt_msghdr *)next; 596 sin = (struct sockaddr_in6 *)(rtm + 1); 597 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len)); 598 if (addr) { 599 if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr)) 600 continue; 601 found_entry = 1; 602 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 603 continue; 604 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || 605 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { 606 /* XXX: should scope id be filled in the kernel? */ 607 if (sin->sin6_scope_id == 0) 608 sin->sin6_scope_id = sdl->sdl_index; 609 #ifdef __KAME__ 610 /* KAME specific hack; removed the embedded id */ 611 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0; 612 #endif 613 } 614 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 615 sizeof(host_buf), NULL, 0, 616 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 617 if (cflag == 1) { 618 delete(host_buf); 619 continue; 620 } 621 gettimeofday(&time, 0); 622 if (tflag) 623 ts_print(&time); 624 625 if (lflag) { 626 addrwidth = strlen(host_buf); 627 if (addrwidth < 31) 628 addrwidth = 31; 629 } else 630 addrwidth = 31; 631 632 printf("%-*.*s %-17.17s %6.6s", addrwidth, addrwidth, host_buf, 633 ether_str(sdl), 634 if_indextoname(sdl->sdl_index, ifix_buf)); 635 636 /* Print neighbor discovery specific informations */ 637 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1); 638 if (nbi) { 639 if (nbi->expire > time.tv_sec) { 640 printf(" %-9.9s", 641 sec2str(nbi->expire - time.tv_sec)); 642 } else if (nbi->expire == 0) 643 printf(" %-9.9s", "permanent"); 644 else 645 printf(" %-9.9s", "expired"); 646 647 switch(nbi->state) { 648 case ND6_LLINFO_NOSTATE: 649 printf(" N"); 650 break; 651 #ifdef ND6_LLINFO_WAITDELETE 652 case ND6_LLINFO_WAITDELETE: 653 printf(" W"); 654 break; 655 #endif 656 case ND6_LLINFO_INCOMPLETE: 657 printf(" I"); 658 break; 659 case ND6_LLINFO_REACHABLE: 660 printf(" R"); 661 break; 662 case ND6_LLINFO_STALE: 663 printf(" S"); 664 break; 665 case ND6_LLINFO_DELAY: 666 printf(" D"); 667 break; 668 case ND6_LLINFO_PROBE: 669 printf(" P"); 670 break; 671 default: 672 printf(" ?"); 673 break; 674 } 675 676 isrouter = nbi->isrouter; 677 prbs = nbi->asked; 678 } else { 679 warnx("failed to get neighbor information"); 680 printf(" "); 681 } 682 putchar(' '); 683 684 /* 685 * other flags. R: router, P: proxy, W: ?? 686 */ 687 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 688 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 689 isrouter ? "R" : "", 690 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 691 } else { 692 sin = (struct sockaddr_in6 *) 693 (sdl->sdl_len + (char *)sdl); 694 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 695 isrouter ? "R" : "", 696 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) 697 ? "P" : "", 698 (sin->sin6_len != sizeof(struct sockaddr_in6)) 699 ? "W" : "", 700 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 701 } 702 printf(" %-4.4s", flgbuf); 703 704 if (prbs) 705 printf(" %4d", prbs); 706 707 printf("\n"); 708 } 709 710 if (repeat) { 711 printf("\n"); 712 sleep(repeat); 713 goto again; 714 } 715 } 716 717 static struct in6_nbrinfo * 718 getnbrinfo(addr, ifindex, warning) 719 struct in6_addr *addr; 720 int ifindex; 721 int warning; 722 { 723 static struct in6_nbrinfo nbi; 724 int s; 725 726 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 727 err(1, "socket"); 728 729 bzero(&nbi, sizeof(nbi)); 730 if_indextoname(ifindex, nbi.ifname); 731 nbi.addr = *addr; 732 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 733 if (warning) 734 warn("ioctl(SIOCGNBRINFO_IN6)"); 735 close(s); 736 return(NULL); 737 } 738 739 close(s); 740 return(&nbi); 741 } 742 743 static char * 744 ether_str(sdl) 745 struct sockaddr_dl *sdl; 746 { 747 static char ebuf[32]; 748 u_char *cp; 749 750 if (sdl->sdl_alen) { 751 cp = (u_char *)LLADDR(sdl); 752 sprintf(ebuf, "%x:%x:%x:%x:%x:%x", 753 cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); 754 } else { 755 sprintf(ebuf, "(incomplete)"); 756 } 757 758 return(ebuf); 759 } 760 761 int 762 ndp_ether_aton(a, n) 763 char *a; 764 u_char *n; 765 { 766 int i, o[6]; 767 768 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 769 &o[3], &o[4], &o[5]); 770 if (i != 6) { 771 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 772 return (1); 773 } 774 for (i=0; i<6; i++) 775 n[i] = o[i]; 776 return (0); 777 } 778 779 void 780 usage() 781 { 782 printf("usage: ndp hostname\n"); 783 printf(" ndp -a[ntl]\n"); 784 printf(" ndp [-ntl] -A wait\n"); 785 printf(" ndp -c[nt]\n"); 786 printf(" ndp -d[nt] hostname\n"); 787 printf(" ndp -f[nt] filename\n"); 788 printf(" ndp -i interface [flags...]\n"); 789 #ifdef SIOCSDEFIFACE_IN6 790 printf(" ndp -I [interface|delete]\n"); 791 #endif 792 printf(" ndp -p\n"); 793 printf(" ndp -r\n"); 794 printf(" ndp -s hostname ether_addr [temp] [proxy]\n"); 795 printf(" ndp -H\n"); 796 printf(" ndp -P\n"); 797 printf(" ndp -R\n"); 798 exit(1); 799 } 800 801 int 802 rtmsg(cmd) 803 int cmd; 804 { 805 static int seq; 806 int rlen; 807 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 808 register char *cp = m_rtmsg.m_space; 809 register int l; 810 811 errno = 0; 812 if (cmd == RTM_DELETE) 813 goto doit; 814 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 815 rtm->rtm_flags = flags; 816 rtm->rtm_version = RTM_VERSION; 817 818 switch (cmd) { 819 default: 820 fprintf(stderr, "ndp: internal wrong cmd\n"); 821 exit(1); 822 case RTM_ADD: 823 rtm->rtm_addrs |= RTA_GATEWAY; 824 rtm->rtm_rmx.rmx_expire = expire_time; 825 rtm->rtm_inits = RTV_EXPIRE; 826 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC); 827 if (rtm->rtm_flags & RTF_ANNOUNCE) { 828 rtm->rtm_flags &= ~RTF_HOST; 829 rtm->rtm_flags |= RTA_NETMASK; 830 } 831 /* FALLTHROUGH */ 832 case RTM_GET: 833 rtm->rtm_addrs |= RTA_DST; 834 } 835 #define NEXTADDR(w, s) \ 836 if (rtm->rtm_addrs & (w)) { \ 837 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);} 838 839 NEXTADDR(RTA_DST, sin_m); 840 NEXTADDR(RTA_GATEWAY, sdl_m); 841 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 842 NEXTADDR(RTA_NETMASK, so_mask); 843 844 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 845 doit: 846 l = rtm->rtm_msglen; 847 rtm->rtm_seq = ++seq; 848 rtm->rtm_type = cmd; 849 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 850 if (errno != ESRCH || cmd != RTM_DELETE) { 851 perror("writing to routing socket"); 852 return (-1); 853 } 854 } 855 do { 856 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 857 } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 858 if (l < 0) 859 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 860 strerror(errno)); 861 return (0); 862 } 863 864 void 865 ifinfo(argc, argv) 866 int argc; 867 char **argv; 868 { 869 struct in6_ndireq nd; 870 int i, s; 871 char *ifname = argv[0]; 872 u_int32_t newflags; 873 874 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 875 perror("ndp: socket"); 876 exit(1); 877 } 878 bzero(&nd, sizeof(nd)); 879 strcpy(nd.ifname, ifname); 880 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 881 perror("ioctl (SIOCGIFINFO_IN6)"); 882 exit(1); 883 } 884 #define ND nd.ndi 885 newflags = ND.flags; 886 for (i = 1; i < argc; i++) { 887 int clear = 0; 888 char *cp = argv[i]; 889 890 if (*cp == '-') { 891 clear = 1; 892 cp++; 893 } 894 895 #define SETFLAG(s, f) \ 896 do {\ 897 if (strcmp(cp, (s)) == 0) {\ 898 if (clear)\ 899 newflags &= ~(f);\ 900 else\ 901 newflags |= (f);\ 902 }\ 903 } while (0) 904 SETFLAG("nud", ND6_IFF_PERFORMNUD); 905 906 ND.flags = newflags; 907 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) { 908 perror("ioctl(SIOCSIFINFO_FLAGS)"); 909 exit(1); 910 } 911 #undef SETFLAG 912 } 913 914 printf("linkmtu=%d", ND.linkmtu); 915 printf(", curhlim=%d", ND.chlim); 916 printf(", basereachable=%ds%dms", 917 ND.basereachable / 1000, ND.basereachable % 1000); 918 printf(", reachable=%ds", ND.reachable); 919 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); 920 if (ND.flags) { 921 printf("\nFlags: "); 922 if ((ND.flags & ND6_IFF_PERFORMNUD) != 0) 923 printf("PERFORMNUD "); 924 } 925 putc('\n', stdout); 926 #undef ND 927 928 close(s); 929 } 930 931 void 932 rtrlist() 933 { 934 struct in6_drlist dr; 935 int s, i; 936 struct timeval time; 937 938 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 939 perror("ndp: socket"); 940 exit(1); 941 } 942 bzero(&dr, sizeof(dr)); 943 strcpy(dr.ifname, "lo0"); /* dummy */ 944 if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) { 945 perror("ioctl (SIOCGDRLST_IN6)"); 946 exit(1); 947 } 948 #define DR dr.defrouter[i] 949 for (i = 0 ; DR.if_index && i < PRLSTSIZ ; i++) { 950 struct sockaddr_in6 sin6; 951 952 bzero(&sin6, sizeof(sin6)); 953 sin6.sin6_family = AF_INET6; 954 sin6.sin6_len = sizeof(sin6); 955 sin6.sin6_addr = DR.rtaddr; 956 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf, 957 sizeof(host_buf), NULL, 0, 958 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 959 960 printf("%s if=%s", host_buf, 961 if_indextoname(DR.if_index, ifix_buf)); 962 printf(", flags=%s%s", 963 DR.flags & ND_RA_FLAG_MANAGED ? "M" : "", 964 DR.flags & ND_RA_FLAG_OTHER ? "O" : ""); 965 gettimeofday(&time, 0); 966 if (DR.expire == 0) 967 printf(", expire=Never\n"); 968 else 969 printf(", expire=%s\n", 970 sec2str(DR.expire - time.tv_sec)); 971 } 972 #undef DR 973 close(s); 974 } 975 976 void 977 plist() 978 { 979 struct in6_prlist pr; 980 int s, i; 981 struct timeval time; 982 983 gettimeofday(&time, 0); 984 985 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 986 perror("ndp: socket"); 987 exit(1); 988 } 989 bzero(&pr, sizeof(pr)); 990 strcpy(pr.ifname, "lo0"); /* dummy */ 991 if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) { 992 perror("ioctl (SIOCGPRLST_IN6)"); 993 exit(1); 994 } 995 #define PR pr.prefix[i] 996 for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) { 997 printf("%s/%d if=%s\n", 998 inet_ntop(AF_INET6, &PR.prefix, ntop_buf, 999 sizeof(ntop_buf)), PR.prefixlen, 1000 if_indextoname(PR.if_index, ifix_buf)); 1001 gettimeofday(&time, 0); 1002 /* 1003 * meaning of fields, especially flags, is very different 1004 * by origin. notify the difference to the users. 1005 */ 1006 printf(" %s", PR.origin == PR_ORIG_RA ? "" : "advertise: "); 1007 printf("flags=%s%s", 1008 PR.raflags.onlink ? "L" : "", 1009 PR.raflags.autonomous ? "A" : ""); 1010 if (PR.vltime == ND6_INFINITE_LIFETIME) 1011 printf(" vltime=infinity"); 1012 else 1013 printf(" vltime=%ld", (long)PR.vltime); 1014 if (PR.pltime == ND6_INFINITE_LIFETIME) 1015 printf(", pltime=infinity"); 1016 else 1017 printf(", pltime=%ld", (long)PR.pltime); 1018 if (PR.expire == 0) 1019 printf(", expire=Never"); 1020 else if (PR.expire >= time.tv_sec) 1021 printf(", expire=%s", 1022 sec2str(PR.expire - time.tv_sec)); 1023 else 1024 printf(", expired"); 1025 switch (PR.origin) { 1026 case PR_ORIG_RA: 1027 printf(", origin=RA"); 1028 break; 1029 case PR_ORIG_RR: 1030 printf(", origin=RR"); 1031 break; 1032 case PR_ORIG_STATIC: 1033 printf(", origin=static"); 1034 break; 1035 case PR_ORIG_KERNEL: 1036 printf(", origin=kernel"); 1037 break; 1038 default: 1039 printf(", origin=?"); 1040 break; 1041 } 1042 printf("\n"); 1043 /* 1044 * "advertising router" list is meaningful only if the prefix 1045 * information is from RA. 1046 */ 1047 if (PR.origin != PR_ORIG_RA) 1048 ; 1049 else if (PR.advrtrs) { 1050 int j; 1051 printf(" advertised by\n"); 1052 for (j = 0; j < PR.advrtrs; j++) { 1053 struct sockaddr_in6 sin6; 1054 struct in6_nbrinfo *nbi; 1055 1056 bzero(&sin6, sizeof(sin6)); 1057 sin6.sin6_family = AF_INET6; 1058 sin6.sin6_len = sizeof(sin6); 1059 sin6.sin6_addr = PR.advrtr[j]; 1060 sin6.sin6_scope_id = PR.if_index; /* XXX */ 1061 getnameinfo((struct sockaddr *)&sin6, 1062 sin6.sin6_len, host_buf, 1063 sizeof(host_buf), NULL, 0, 1064 NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)); 1065 printf(" %s", host_buf); 1066 1067 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index, 1068 0); 1069 if (nbi) { 1070 switch(nbi->state) { 1071 case ND6_LLINFO_REACHABLE: 1072 case ND6_LLINFO_STALE: 1073 case ND6_LLINFO_DELAY: 1074 case ND6_LLINFO_PROBE: 1075 printf(" (reachable)\n"); 1076 break; 1077 default: 1078 printf(" (unreachable)\n"); 1079 } 1080 } else 1081 printf(" (no neighbor state)\n"); 1082 } 1083 if (PR.advrtrs > DRLSTSIZ) 1084 printf(" and %d routers\n", 1085 PR.advrtrs - DRLSTSIZ); 1086 } else 1087 printf(" No advertising router\n"); 1088 } 1089 #undef PR 1090 close(s); 1091 } 1092 1093 void 1094 pfx_flush() 1095 { 1096 char dummyif[IFNAMSIZ+8]; 1097 int s; 1098 1099 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1100 err(1, "socket"); 1101 strcpy(dummyif, "lo0"); /* dummy */ 1102 if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 1103 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 1104 } 1105 1106 void 1107 rtr_flush() 1108 { 1109 char dummyif[IFNAMSIZ+8]; 1110 int s; 1111 1112 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1113 err(1, "socket"); 1114 strcpy(dummyif, "lo0"); /* dummy */ 1115 if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 1116 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 1117 1118 close(s); 1119 } 1120 1121 void 1122 harmonize_rtr() 1123 { 1124 char dummyif[IFNAMSIZ+8]; 1125 int s; 1126 1127 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1128 err(1, "socket"); 1129 strcpy(dummyif, "lo0"); /* dummy */ 1130 if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) 1131 err(1, "ioctl (SIOCSNDFLUSH_IN6)"); 1132 1133 close(s); 1134 } 1135 1136 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1137 static void 1138 setdefif(ifname) 1139 char *ifname; 1140 { 1141 struct in6_ndifreq ndifreq; 1142 unsigned int ifindex; 1143 1144 if (strcasecmp(ifname, "delete") == 0) 1145 ifindex = 0; 1146 else { 1147 if ((ifindex = if_nametoindex(ifname)) == 0) 1148 err(1, "failed to resolve i/f index for %s", ifname); 1149 } 1150 1151 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1152 err(1, "socket"); 1153 1154 strcpy(ndifreq.ifname, "lo0"); /* dummy */ 1155 ndifreq.ifindex = ifindex; 1156 1157 if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1158 err(1, "ioctl (SIOCSDEFIFACE_IN6)"); 1159 1160 close(s); 1161 } 1162 1163 static void 1164 getdefif() 1165 { 1166 struct in6_ndifreq ndifreq; 1167 char ifname[IFNAMSIZ+8]; 1168 1169 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1170 err(1, "socket"); 1171 1172 memset(&ndifreq, 0, sizeof(ndifreq)); 1173 strcpy(ndifreq.ifname, "lo0"); /* dummy */ 1174 1175 if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1176 err(1, "ioctl (SIOCGDEFIFACE_IN6)"); 1177 1178 if (ndifreq.ifindex == 0) 1179 printf("No default interface.\n"); 1180 else { 1181 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL) 1182 err(1, "failed to resolve ifname for index %lu", 1183 ndifreq.ifindex); 1184 printf("ND default interface = %s\n", ifname); 1185 } 1186 1187 close(s); 1188 } 1189 #endif 1190 1191 static char * 1192 sec2str(total) 1193 time_t total; 1194 { 1195 static char result[256]; 1196 int days, hours, mins, secs; 1197 int first = 1; 1198 char *p = result; 1199 1200 days = total / 3600 / 24; 1201 hours = (total / 3600) % 24; 1202 mins = (total / 60) % 60; 1203 secs = total % 60; 1204 1205 if (days) { 1206 first = 0; 1207 p += sprintf(p, "%dd", days); 1208 } 1209 if (!first || hours) { 1210 first = 0; 1211 p += sprintf(p, "%dh", hours); 1212 } 1213 if (!first || mins) { 1214 first = 0; 1215 p += sprintf(p, "%dm", mins); 1216 } 1217 sprintf(p, "%ds", secs); 1218 1219 return(result); 1220 } 1221 1222 /* 1223 * Print the timestamp 1224 * from tcpdump/util.c 1225 */ 1226 static void 1227 ts_print(tvp) 1228 const struct timeval *tvp; 1229 { 1230 int s; 1231 1232 /* Default */ 1233 s = (tvp->tv_sec + thiszone) % 86400; 1234 (void)printf("%02d:%02d:%02d.%06u ", 1235 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); 1236 } 1237
Indexes created Mon Sep 29 21:09:56 GMT 2025