ndp.c revision 219819
11558Srgrimes/* $FreeBSD: head/usr.sbin/ndp/ndp.c 219819 2011-03-21 09:40:01Z jeff $ */ 21558Srgrimes/* $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $ */ 31558Srgrimes 41558Srgrimes/* 51558Srgrimes * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. 61558Srgrimes * All rights reserved. 71558Srgrimes * 81558Srgrimes * Redistribution and use in source and binary forms, with or without 91558Srgrimes * modification, are permitted provided that the following conditions 101558Srgrimes * are met: 111558Srgrimes * 1. Redistributions of source code must retain the above copyright 121558Srgrimes * notice, this list of conditions and the following disclaimer. 131558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141558Srgrimes * notice, this list of conditions and the following disclaimer in the 151558Srgrimes * documentation and/or other materials provided with the distribution. 161558Srgrimes * 3. Neither the name of the project nor the names of its contributors 171558Srgrimes * may be used to endorse or promote products derived from this software 181558Srgrimes * without specific prior written permission. 191558Srgrimes * 201558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 211558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 241558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2823684Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2950476Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301558Srgrimes * SUCH DAMAGE. 31270112Srmacklem */ 321558Srgrimes/* 331558Srgrimes * Copyright (c) 1984, 1993 341558Srgrimes * The Regents of the University of California. All rights reserved. 351558Srgrimes * 361558Srgrimes * This code is derived from software contributed to Berkeley by 371558Srgrimes * Sun Microsystems, Inc. 381558Srgrimes * 391558Srgrimes * Redistribution and use in source and binary forms, with or without 4068960Sru * modification, are permitted provided that the following conditions 41220981Srmacklem * are met: 421558Srgrimes * 1. Redistributions of source code must retain the above copyright 4353096Sdillon * notice, this list of conditions and the following disclaimer. 44243785Salfred * 2. Redistributions in binary form must reproduce the above copyright 45243785Salfred * notice, this list of conditions and the following disclaimer in the 461558Srgrimes * documentation and/or other materials provided with the distribution. 4799501Scharnier * 4. Neither the name of the University nor the names of its contributors 4899501Scharnier * may be used to endorse or promote products derived from this software 4999501Scharnier * without specific prior written permission. 501558Srgrimes * 511558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 521558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5368960Sru * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 541558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 551558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56269443Srmacklem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 571558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 581558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 591558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 601558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 611558Srgrimes * SUCH DAMAGE. 621558Srgrimes */ 631558Srgrimes 641558Srgrimes/* 651558Srgrimes * Based on: 6674462Salfred * "@(#) Copyright (c) 1984, 1993\n\ 671558Srgrimes * The Regents of the University of California. All rights reserved.\n"; 681558Srgrimes * 691558Srgrimes * "@(#)arp.c 8.2 (Berkeley) 1/2/94"; 701558Srgrimes */ 711558Srgrimes 7274462Salfred/* 7374462Salfred * ndp - display, set, delete and flush neighbor cache 7474462Salfred */ 7574462Salfred 7674462Salfred 7774462Salfred#include <sys/param.h> 7874462Salfred#include <sys/file.h> 79243785Salfred#include <sys/ioctl.h> 80243785Salfred#include <sys/socket.h> 81243785Salfred#include <sys/sysctl.h> 82243785Salfred#include <sys/time.h> 83243785Salfred#include <sys/queue.h> 84243785Salfred 85243785Salfred#include <net/if.h> 86243785Salfred#include <net/if_var.h> 87243785Salfred#include <net/if_dl.h> 88243785Salfred#include <net/if_types.h> 89243785Salfred#include <net/route.h> 9053096Sdillon 9153096Sdillon#include <netinet/in.h> 9257668Ssheldonh#include <netinet/if_ether.h> 9357668Ssheldonh 9453096Sdillon#include <netinet/icmp6.h> 9553096Sdillon#include <netinet6/in6_var.h> 9653096Sdillon#include <netinet6/nd6.h> 9753096Sdillon 9853096Sdillon#include <arpa/inet.h> 9953096Sdillon 100131500Sru#include <netdb.h> 101131500Sru#include <errno.h> 10253096Sdillon#include <nlist.h> 103131500Sru#include <stdio.h> 104131500Sru#include <string.h> 10553096Sdillon#include <paths.h> 1061558Srgrimes#include <err.h> 1071558Srgrimes#include <stdlib.h> 1081558Srgrimes#include <fcntl.h> 1091558Srgrimes#include <unistd.h> 1101558Srgrimes#include "gmt2local.h" 1111558Srgrimes 1121558Srgrimes/* packing rule for routing socket */ 1131558Srgrimes#define ROUNDUP(a) \ 114192993Srmacklem ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 115220981Srmacklem#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 116220981Srmacklem 117220981Srmacklem#define NEXTADDR(w, s) \ 118220981Srmacklem if (rtm->rtm_addrs & (w)) { \ 119220981Srmacklem bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);} 1201558Srgrimes 1211558Srgrimes 12279754Sddstatic pid_t pid; 12335582Speterstatic int nflag; 1241558Srgrimesstatic int tflag; 1251558Srgrimesstatic int32_t thiszone; /* time difference with gmt */ 1261558Srgrimesstatic int s = -1; 1271558Srgrimesstatic int repeat = 0; 1281558Srgrimes 1291558Srgrimeschar ntop_buf[INET6_ADDRSTRLEN]; /* inet_ntop() */ 1301558Srgrimeschar host_buf[NI_MAXHOST]; /* getnameinfo() */ 1311558Srgrimeschar ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 1321558Srgrimes 1331558Srgrimesint main(int, char **); 13499501Scharnierint file(char *); 13599501Scharniervoid getsocket(void); 13699501Scharnierint set(int, char **); 1371558Srgrimesvoid get(char *); 1381558Srgrimesint delete(char *); 1391558Srgrimesvoid dump(struct in6_addr *, int); 140192674Srmacklemstatic struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int); 141192674Srmacklemstatic char *ether_str(struct sockaddr_dl *); 142192674Srmacklemint ndp_ether_aton(char *, u_char *); 143192674Srmacklemvoid usage(void); 144192674Srmacklemint rtmsg(int); 1451558Srgrimesvoid ifinfo(char *, int, char **); 1462999Swollmanvoid rtrlist(void); 14768960Sruvoid plist(void); 14879754Sddvoid pfx_flush(void); 1492999Swollmanvoid rtr_flush(void); 1502999Swollmanvoid harmonize_rtr(void); 1512999Swollman#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1522999Swollmanstatic void getdefif(void); 1532999Swollmanstatic void setdefif(char *); 154101685Smux#endif 1552999Swollmanstatic char *sec2str(time_t); 1562999Swollmanstatic void ts_print(const struct timeval *); 15745212Sghelmer 15868960Sru#ifdef ICMPV6CTL_ND6_DRLIST 1592999Swollmanstatic char *rtpref_str[] = { 1602999Swollman "medium", /* 00 */ 16153096Sdillon "high", /* 01 */ 16268960Sru "rsv", /* 10 */ 16353096Sdillon "low" /* 11 */ 16453096Sdillon}; 16553096Sdillon#endif 166131500Sru 167131500Sruint mode = 0; 168131500Sruchar *arg = NULL; 169131500Sru 17053096Sdillonint 17153096Sdillonmain(argc, argv) 17299501Scharnier int argc; 17399501Scharnier char **argv; 17499501Scharnier{ 17553096Sdillon int ch; 17653096Sdillon 17753096Sdillon pid = getpid(); 178270112Srmacklem thiszone = gmt2local(0); 179270112Srmacklem while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1) 180270112Srmacklem switch (ch) { 181270112Srmacklem case 'a': 182270112Srmacklem case 'c': 183270112Srmacklem case 'p': 184270112Srmacklem case 'r': 185270112Srmacklem case 'H': 186270112Srmacklem case 'P': 187270112Srmacklem case 'R': 188270112Srmacklem case 's': 189270112Srmacklem case 'I': 190270112Srmacklem if (mode) { 191270112Srmacklem usage(); 192270112Srmacklem /*NOTREACHED*/ 193270112Srmacklem } 194270112Srmacklem mode = ch; 195270112Srmacklem arg = NULL; 19699501Scharnier break; 19774462Salfred case 'd': 19899501Scharnier case 'f': 19974519Sru case 'i' : 20074519Sru if (mode) { 20174519Sru usage(); 20274519Sru /*NOTREACHED*/ 20374519Sru } 20499501Scharnier mode = ch; 20574462Salfred arg = optarg; 20699501Scharnier break; 20774462Salfred case 'n': 20874519Sru nflag = 1; 20974519Sru break; 21074462Salfred case 't': 21174462Salfred tflag = 1; 21274462Salfred break; 213140368Sru case 'A': 21481687Sru if (mode) { 2151558Srgrimes usage(); 2161558Srgrimes /*NOTREACHED*/ 217101685Smux } 2181558Srgrimes mode = 'a'; 219192674Srmacklem repeat = atoi(optarg); 220127640Ssimon if (repeat < 0) { 221220875Srmacklem usage(); 222192674Srmacklem /*NOTREACHED*/ 22379366Sru } 2241558Srgrimes break; 22555937Sdillon default: 226192674Srmacklem usage(); 227192674Srmacklem } 228220833Srmacklem 2291558Srgrimes argc -= optind; 2301558Srgrimes argv += optind; 23168960Sru 23217797Smpp switch (mode) { 23317797Smpp case 'a': 234192674Srmacklem case 'c': 235192674Srmacklem if (argc != 0) { 236192674Srmacklem usage(); 237192674Srmacklem /*NOTREACHED*/ 238192674Srmacklem } 239192674Srmacklem dump(0, mode == 'c'); 240192674Srmacklem break; 241192674Srmacklem case 'd': 242192674Srmacklem if (argc != 0) { 243192674Srmacklem usage(); 244192674Srmacklem /*NOTREACHED*/ 245 } 246 delete(arg); 247 break; 248 case 'I': 249#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 250 if (argc > 1) { 251 usage(); 252 /*NOTREACHED*/ 253 } else if (argc == 1) { 254 if (strcmp(*argv, "delete") == 0 || 255 if_nametoindex(*argv)) 256 setdefif(*argv); 257 else 258 errx(1, "invalid interface %s", *argv); 259 } 260 getdefif(); /* always call it to print the result */ 261 break; 262#else 263 errx(1, "not supported yet"); 264 /*NOTREACHED*/ 265#endif 266 case 'p': 267 if (argc != 0) { 268 usage(); 269 /*NOTREACHED*/ 270 } 271 plist(); 272 break; 273 case 'i': 274 ifinfo(arg, argc, argv); 275 break; 276 case 'r': 277 if (argc != 0) { 278 usage(); 279 /*NOTREACHED*/ 280 } 281 rtrlist(); 282 break; 283 case 's': 284 if (argc < 2 || argc > 4) 285 usage(); 286 exit(set(argc, argv) ? 1 : 0); 287 case 'H': 288 if (argc != 0) { 289 usage(); 290 /*NOTREACHED*/ 291 } 292 harmonize_rtr(); 293 break; 294 case 'P': 295 if (argc != 0) { 296 usage(); 297 /*NOTREACHED*/ 298 } 299 pfx_flush(); 300 break; 301 case 'R': 302 if (argc != 0) { 303 usage(); 304 /*NOTREACHED*/ 305 } 306 rtr_flush(); 307 break; 308 case 0: 309 if (argc != 1) { 310 usage(); 311 /*NOTREACHED*/ 312 } 313 get(argv[0]); 314 break; 315 } 316 exit(0); 317} 318 319/* 320 * Process a file to set standard ndp entries 321 */ 322int 323file(name) 324 char *name; 325{ 326 FILE *fp; 327 int i, retval; 328 char line[100], arg[5][50], *args[5]; 329 330 if ((fp = fopen(name, "r")) == NULL) { 331 fprintf(stderr, "ndp: cannot open %s\n", name); 332 exit(1); 333 } 334 args[0] = &arg[0][0]; 335 args[1] = &arg[1][0]; 336 args[2] = &arg[2][0]; 337 args[3] = &arg[3][0]; 338 args[4] = &arg[4][0]; 339 retval = 0; 340 while (fgets(line, sizeof(line), fp) != NULL) { 341 i = sscanf(line, "%49s %49s %49s %49s %49s", 342 arg[0], arg[1], arg[2], arg[3], arg[4]); 343 if (i < 2) { 344 fprintf(stderr, "ndp: bad line: %s\n", line); 345 retval = 1; 346 continue; 347 } 348 if (set(i, args)) 349 retval = 1; 350 } 351 fclose(fp); 352 return (retval); 353} 354 355void 356getsocket() 357{ 358 if (s < 0) { 359 s = socket(PF_ROUTE, SOCK_RAW, 0); 360 if (s < 0) { 361 err(1, "socket"); 362 /* NOTREACHED */ 363 } 364 } 365} 366 367struct sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 }; 368struct sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m; 369struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m; 370int expire_time, flags, found_entry; 371struct { 372 struct rt_msghdr m_rtm; 373 char m_space[512]; 374} m_rtmsg; 375 376/* 377 * Set an individual neighbor cache entry 378 */ 379int 380set(argc, argv) 381 int argc; 382 char **argv; 383{ 384 register struct sockaddr_in6 *sin = &sin_m; 385 register struct sockaddr_dl *sdl; 386 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 387 struct addrinfo hints, *res; 388 int gai_error; 389 u_char *ea; 390 char *host = argv[0], *eaddr = argv[1]; 391 392 getsocket(); 393 argc -= 2; 394 argv += 2; 395 sdl_m = blank_sdl; 396 sin_m = blank_sin; 397 398 bzero(&hints, sizeof(hints)); 399 hints.ai_family = AF_INET6; 400 gai_error = getaddrinfo(host, NULL, &hints, &res); 401 if (gai_error) { 402 fprintf(stderr, "ndp: %s: %s\n", host, 403 gai_strerror(gai_error)); 404 return 1; 405 } 406 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 407#ifdef __KAME__ 408 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 409 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 410 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 411 } 412#endif 413 ea = (u_char *)LLADDR(&sdl_m); 414 if (ndp_ether_aton(eaddr, ea) == 0) 415 sdl_m.sdl_alen = 6; 416 flags = expire_time = 0; 417 while (argc-- > 0) { 418 if (strncmp(argv[0], "temp", 4) == 0) { 419 struct timeval time; 420 421 gettimeofday(&time, 0); 422 expire_time = time.tv_sec + 20 * 60; 423 } else if (strncmp(argv[0], "proxy", 5) == 0) 424 flags |= RTF_ANNOUNCE; 425 argv++; 426 } 427 if (rtmsg(RTM_GET) < 0) { 428 errx(1, "RTM_GET(%s) failed", host); 429 /* NOTREACHED */ 430 } 431 sin = (struct sockaddr_in6 *)(rtm + 1); 432 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 433 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 434 if (sdl->sdl_family == AF_LINK && 435 !(rtm->rtm_flags & RTF_GATEWAY)) { 436 switch (sdl->sdl_type) { 437 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 438 case IFT_ISO88024: case IFT_ISO88025: 439 case IFT_L2VLAN: case IFT_BRIDGE: 440 goto overwrite; 441 } 442 } 443 /* 444 * IPv4 arp command retries with sin_other = SIN_PROXY here. 445 */ 446 fprintf(stderr, "set: cannot configure a new entry\n"); 447 return 1; 448 } 449 450overwrite: 451 if (sdl->sdl_family != AF_LINK) { 452 printf("cannot intuit interface index and type for %s\n", host); 453 return (1); 454 } 455 sdl_m.sdl_type = sdl->sdl_type; 456 sdl_m.sdl_index = sdl->sdl_index; 457 return (rtmsg(RTM_ADD)); 458} 459 460/* 461 * Display an individual neighbor cache entry 462 */ 463void 464get(host) 465 char *host; 466{ 467 struct sockaddr_in6 *sin = &sin_m; 468 struct addrinfo hints, *res; 469 int gai_error; 470 471 sin_m = blank_sin; 472 bzero(&hints, sizeof(hints)); 473 hints.ai_family = AF_INET6; 474 gai_error = getaddrinfo(host, NULL, &hints, &res); 475 if (gai_error) { 476 fprintf(stderr, "ndp: %s: %s\n", host, 477 gai_strerror(gai_error)); 478 return; 479 } 480 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 481#ifdef __KAME__ 482 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 483 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 484 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 485 } 486#endif 487 dump(&sin->sin6_addr, 0); 488 if (found_entry == 0) { 489 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 490 sizeof(host_buf), NULL ,0, 491 (nflag ? NI_NUMERICHOST : 0)); 492 printf("%s (%s) -- no entry\n", host, host_buf); 493 exit(1); 494 } 495} 496 497/* 498 * Delete a neighbor cache entry 499 */ 500int 501delete(host) 502 char *host; 503{ 504 struct sockaddr_in6 *sin = &sin_m; 505 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 506 register char *cp = m_rtmsg.m_space; 507 struct sockaddr_dl *sdl; 508 struct addrinfo hints, *res; 509 int gai_error; 510 511 getsocket(); 512 sin_m = blank_sin; 513 514 bzero(&hints, sizeof(hints)); 515 hints.ai_family = AF_INET6; 516 gai_error = getaddrinfo(host, NULL, &hints, &res); 517 if (gai_error) { 518 fprintf(stderr, "ndp: %s: %s\n", host, 519 gai_strerror(gai_error)); 520 return 1; 521 } 522 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 523#ifdef __KAME__ 524 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 525 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 526 htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); 527 } 528#endif 529 if (rtmsg(RTM_GET) < 0) { 530 errx(1, "RTM_GET(%s) failed", host); 531 /* NOTREACHED */ 532 } 533 sin = (struct sockaddr_in6 *)(rtm + 1); 534 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 535 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 536 if (sdl->sdl_family == AF_LINK && 537 !(rtm->rtm_flags & RTF_GATEWAY)) { 538 goto delete; 539 } 540 /* 541 * IPv4 arp command retries with sin_other = SIN_PROXY here. 542 */ 543 fprintf(stderr, "delete: cannot delete non-NDP entry\n"); 544 return 1; 545 } 546 547delete: 548 if (sdl->sdl_family != AF_LINK) { 549 printf("cannot locate %s\n", host); 550 return (1); 551 } 552 /* 553 * need to reinit the field because it has rt_key 554 * but we want the actual address 555 */ 556 NEXTADDR(RTA_DST, sin_m); 557 rtm->rtm_flags |= RTF_LLDATA; 558 if (rtmsg(RTM_DELETE) == 0) { 559 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */ 560 561#ifdef __KAME__ 562 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) { 563 s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]); 564 *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0; 565 } 566#endif 567 getnameinfo((struct sockaddr *)&s6, 568 s6.sin6_len, host_buf, 569 sizeof(host_buf), NULL, 0, 570 (nflag ? NI_NUMERICHOST : 0)); 571 printf("%s (%s) deleted\n", host, host_buf); 572 } 573 574 return 0; 575} 576 577#define W_ADDR 36 578#define W_LL 17 579#define W_IF 6 580 581/* 582 * Dump the entire neighbor cache 583 */ 584void 585dump(addr, cflag) 586 struct in6_addr *addr; 587 int cflag; 588{ 589 int mib[6]; 590 size_t needed; 591 char *lim, *buf, *next; 592 struct rt_msghdr *rtm; 593 struct sockaddr_in6 *sin; 594 struct sockaddr_dl *sdl; 595 extern int h_errno; 596 struct in6_nbrinfo *nbi; 597 struct timeval time; 598 int addrwidth; 599 int llwidth; 600 int ifwidth; 601 char flgbuf[8]; 602 char *ifname; 603 604 /* Print header */ 605 if (!tflag && !cflag) 606 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n", 607 W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", 608 W_IF, W_IF, "Netif", "Expire", "S", "Flags"); 609 610again:; 611 mib[0] = CTL_NET; 612 mib[1] = PF_ROUTE; 613 mib[2] = 0; 614 mib[3] = AF_INET6; 615 mib[4] = NET_RT_FLAGS; 616#ifdef RTF_LLINFO 617 mib[5] = RTF_LLINFO; 618#else 619 mib[5] = 0; 620#endif 621 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 622 err(1, "sysctl(PF_ROUTE estimate)"); 623 if (needed > 0) { 624 if ((buf = malloc(needed)) == NULL) 625 err(1, "malloc"); 626 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 627 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); 628 lim = buf + needed; 629 } else 630 buf = lim = NULL; 631 632 for (next = buf; next && next < lim; next += rtm->rtm_msglen) { 633 int isrouter = 0, prbs = 0; 634 635 rtm = (struct rt_msghdr *)next; 636 sin = (struct sockaddr_in6 *)(rtm + 1); 637 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len)); 638 639 /* 640 * Some OSes can produce a route that has the LINK flag but 641 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD 642 * and BSD/OS, where xx is not the interface identifier on 643 * lo0). Such routes entry would annoy getnbrinfo() below, 644 * so we skip them. 645 * XXX: such routes should have the GATEWAY flag, not the 646 * LINK flag. However, there is rotten routing software 647 * that advertises all routes that have the GATEWAY flag. 648 * Thus, KAME kernel intentionally does not set the LINK flag. 649 * What is to be fixed is not ndp, but such routing software 650 * (and the kernel workaround)... 651 */ 652 if (sdl->sdl_family != AF_LINK) 653 continue; 654 655 if (!(rtm->rtm_flags & RTF_HOST)) 656 continue; 657 658 if (addr) { 659 if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr)) 660 continue; 661 found_entry = 1; 662 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 663 continue; 664 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || 665 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { 666 /* XXX: should scope id be filled in the kernel? */ 667 if (sin->sin6_scope_id == 0) 668 sin->sin6_scope_id = sdl->sdl_index; 669#ifdef __KAME__ 670 /* KAME specific hack; removed the embedded id */ 671 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0; 672#endif 673 } 674 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 675 sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); 676 if (cflag) { 677#ifdef RTF_WASCLONED 678 if (rtm->rtm_flags & RTF_WASCLONED) 679 delete(host_buf); 680#elif defined(RTF_CLONED) 681 if (rtm->rtm_flags & RTF_CLONED) 682 delete(host_buf); 683#else 684 delete(host_buf); 685#endif 686 continue; 687 } 688 gettimeofday(&time, 0); 689 if (tflag) 690 ts_print(&time); 691 692 addrwidth = strlen(host_buf); 693 if (addrwidth < W_ADDR) 694 addrwidth = W_ADDR; 695 llwidth = strlen(ether_str(sdl)); 696 if (W_ADDR + W_LL - addrwidth > llwidth) 697 llwidth = W_ADDR + W_LL - addrwidth; 698 ifname = if_indextoname(sdl->sdl_index, ifix_buf); 699 if (!ifname) 700 ifname = "?"; 701 ifwidth = strlen(ifname); 702 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) 703 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; 704 705 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, 706 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname); 707 708 /* Print neighbor discovery specific informations */ 709 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1); 710 if (nbi) { 711 if (nbi->expire > time.tv_sec) { 712 printf(" %-9.9s", 713 sec2str(nbi->expire - time.tv_sec)); 714 } else if (nbi->expire == 0) 715 printf(" %-9.9s", "permanent"); 716 else 717 printf(" %-9.9s", "expired"); 718 719 switch (nbi->state) { 720 case ND6_LLINFO_NOSTATE: 721 printf(" N"); 722 break; 723#ifdef ND6_LLINFO_WAITDELETE 724 case ND6_LLINFO_WAITDELETE: 725 printf(" W"); 726 break; 727#endif 728 case ND6_LLINFO_INCOMPLETE: 729 printf(" I"); 730 break; 731 case ND6_LLINFO_REACHABLE: 732 printf(" R"); 733 break; 734 case ND6_LLINFO_STALE: 735 printf(" S"); 736 break; 737 case ND6_LLINFO_DELAY: 738 printf(" D"); 739 break; 740 case ND6_LLINFO_PROBE: 741 printf(" P"); 742 break; 743 default: 744 printf(" ?"); 745 break; 746 } 747 748 isrouter = nbi->isrouter; 749 prbs = nbi->asked; 750 } else { 751 warnx("failed to get neighbor information"); 752 printf(" "); 753 } 754 755 /* 756 * other flags. R: router, P: proxy, W: ?? 757 */ 758 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 759 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 760 isrouter ? "R" : "", 761 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 762 } else { 763 sin = (struct sockaddr_in6 *) 764 (sdl->sdl_len + (char *)sdl); 765#if 0 /* W and P are mystery even for us */ 766 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 767 isrouter ? "R" : "", 768 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "", 769 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "", 770 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 771#else 772 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 773 isrouter ? "R" : "", 774 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 775#endif 776 } 777 printf(" %s", flgbuf); 778 779 if (prbs) 780 printf(" %d", prbs); 781 782 printf("\n"); 783 } 784 if (buf != NULL) 785 free(buf); 786 787 if (repeat) { 788 printf("\n"); 789 fflush(stdout); 790 sleep(repeat); 791 goto again; 792 } 793} 794 795static struct in6_nbrinfo * 796getnbrinfo(addr, ifindex, warning) 797 struct in6_addr *addr; 798 int ifindex; 799 int warning; 800{ 801 static struct in6_nbrinfo nbi; 802 int s; 803 804 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 805 err(1, "socket"); 806 807 bzero(&nbi, sizeof(nbi)); 808 if_indextoname(ifindex, nbi.ifname); 809 nbi.addr = *addr; 810 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 811 if (warning) 812 warn("ioctl(SIOCGNBRINFO_IN6)"); 813 close(s); 814 return(NULL); 815 } 816 817 close(s); 818 return(&nbi); 819} 820 821static char * 822ether_str(struct sockaddr_dl *sdl) 823{ 824 static char hbuf[NI_MAXHOST]; 825 char *cp; 826 827 if (sdl->sdl_alen == ETHER_ADDR_LEN) { 828 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)), 829 sizeof(hbuf)); 830 } else if (sdl->sdl_alen) { 831 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 832 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n); 833 } else 834 snprintf(hbuf, sizeof(hbuf), "(incomplete)"); 835 836 return(hbuf); 837} 838 839int 840ndp_ether_aton(a, n) 841 char *a; 842 u_char *n; 843{ 844 int i, o[6]; 845 846 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 847 &o[3], &o[4], &o[5]); 848 if (i != 6) { 849 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 850 return (1); 851 } 852 for (i = 0; i < 6; i++) 853 n[i] = o[i]; 854 return (0); 855} 856 857void 858usage() 859{ 860 printf("usage: ndp [-nt] hostname\n"); 861 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n"); 862 printf(" ndp [-nt] -A wait\n"); 863 printf(" ndp [-nt] -d hostname\n"); 864 printf(" ndp [-nt] -f filename\n"); 865 printf(" ndp [-nt] -i interface [flags...]\n"); 866#ifdef SIOCSDEFIFACE_IN6 867 printf(" ndp [-nt] -I [interface|delete]\n"); 868#endif 869 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n"); 870 exit(1); 871} 872 873int 874rtmsg(cmd) 875 int cmd; 876{ 877 static int seq; 878 int rlen; 879 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 880 register char *cp = m_rtmsg.m_space; 881 register int l; 882 883 errno = 0; 884 if (cmd == RTM_DELETE) 885 goto doit; 886 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 887 rtm->rtm_flags = flags; 888 rtm->rtm_version = RTM_VERSION; 889 890 switch (cmd) { 891 default: 892 fprintf(stderr, "ndp: internal wrong cmd\n"); 893 exit(1); 894 case RTM_ADD: 895 rtm->rtm_addrs |= RTA_GATEWAY; 896 if (expire_time) { 897 rtm->rtm_rmx.rmx_expire = expire_time; 898 rtm->rtm_inits = RTV_EXPIRE; 899 } 900 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); 901#if 0 /* we don't support ipv6addr/128 type proxying */ 902 if (rtm->rtm_flags & RTF_ANNOUNCE) { 903 rtm->rtm_flags &= ~RTF_HOST; 904 rtm->rtm_addrs |= RTA_NETMASK; 905 } 906#endif 907 /* FALLTHROUGH */ 908 case RTM_GET: 909 rtm->rtm_addrs |= RTA_DST; 910 } 911 912 NEXTADDR(RTA_DST, sin_m); 913 NEXTADDR(RTA_GATEWAY, sdl_m); 914#if 0 /* we don't support ipv6addr/128 type proxying */ 915 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 916 NEXTADDR(RTA_NETMASK, so_mask); 917#endif 918 919 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 920doit: 921 l = rtm->rtm_msglen; 922 rtm->rtm_seq = ++seq; 923 rtm->rtm_type = cmd; 924 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 925 if (errno != ESRCH || cmd != RTM_DELETE) { 926 err(1, "writing to routing socket"); 927 /* NOTREACHED */ 928 } 929 } 930 do { 931 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 932 } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 933 if (l < 0) 934 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 935 strerror(errno)); 936 return (0); 937} 938 939void 940ifinfo(ifname, argc, argv) 941 char *ifname; 942 int argc; 943 char **argv; 944{ 945 struct in6_ndireq nd; 946 int i, s; 947 u_int32_t newflags; 948#ifdef IPV6CTL_USETEMPADDR 949 u_int8_t nullbuf[8]; 950#endif 951 952 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 953 err(1, "socket"); 954 /* NOTREACHED */ 955 } 956 bzero(&nd, sizeof(nd)); 957 strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); 958 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 959 err(1, "ioctl(SIOCGIFINFO_IN6)"); 960 /* NOTREACHED */ 961 } 962#define ND nd.ndi 963 newflags = ND.flags; 964 for (i = 0; i < argc; i++) { 965 int clear = 0; 966 char *cp = argv[i]; 967 968 if (*cp == '-') { 969 clear = 1; 970 cp++; 971 } 972 973#define SETFLAG(s, f) \ 974 do {\ 975 if (strcmp(cp, (s)) == 0) {\ 976 if (clear)\ 977 newflags &= ~(f);\ 978 else\ 979 newflags |= (f);\ 980 }\ 981 } while (0) 982/* 983 * XXX: this macro is not 100% correct, in that it matches "nud" against 984 * "nudbogus". But we just let it go since this is minor. 985 */ 986#define SETVALUE(f, v) \ 987 do { \ 988 char *valptr; \ 989 unsigned long newval; \ 990 v = 0; /* unspecified */ \ 991 if (strncmp(cp, f, strlen(f)) == 0) { \ 992 valptr = strchr(cp, '='); \ 993 if (valptr == NULL) \ 994 err(1, "syntax error in %s field", (f)); \ 995 errno = 0; \ 996 newval = strtoul(++valptr, NULL, 0); \ 997 if (errno) \ 998 err(1, "syntax error in %s's value", (f)); \ 999 v = newval; \ 1000 } \ 1001 } while (0) 1002 1003 SETFLAG("disabled", ND6_IFF_IFDISABLED); 1004 SETFLAG("nud", ND6_IFF_PERFORMNUD); 1005#ifdef ND6_IFF_ACCEPT_RTADV 1006 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV); 1007#endif 1008#ifdef ND6_IFF_AUTO_LINKLOCAL 1009 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL); 1010#endif 1011#ifdef ND6_IFF_PREFER_SOURCE 1012 SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE); 1013#endif 1014 SETVALUE("basereachable", ND.basereachable); 1015 SETVALUE("retrans", ND.retrans); 1016 SETVALUE("curhlim", ND.chlim); 1017 1018 ND.flags = newflags; 1019 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) { 1020 err(1, "ioctl(SIOCSIFINFO_IN6)"); 1021 /* NOTREACHED */ 1022 } 1023#undef SETFLAG 1024#undef SETVALUE 1025 } 1026 1027 if (!ND.initialized) { 1028 errx(1, "%s: not initialized yet", ifname); 1029 /* NOTREACHED */ 1030 } 1031 1032 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 1033 err(1, "ioctl(SIOCGIFINFO_IN6)"); 1034 /* NOTREACHED */ 1035 } 1036 printf("linkmtu=%d", ND.linkmtu); 1037 printf(", maxmtu=%d", ND.maxmtu); 1038 printf(", curhlim=%d", ND.chlim); 1039 printf(", basereachable=%ds%dms", 1040 ND.basereachable / 1000, ND.basereachable % 1000); 1041 printf(", reachable=%ds", ND.reachable); 1042 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); 1043#ifdef IPV6CTL_USETEMPADDR 1044 memset(nullbuf, 0, sizeof(nullbuf)); 1045 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) { 1046 int j; 1047 u_int8_t *rbuf; 1048 1049 for (i = 0; i < 3; i++) { 1050 switch (i) { 1051 case 0: 1052 printf("\nRandom seed(0): "); 1053 rbuf = ND.randomseed0; 1054 break; 1055 case 1: 1056 printf("\nRandom seed(1): "); 1057 rbuf = ND.randomseed1; 1058 break; 1059 case 2: 1060 printf("\nRandom ID: "); 1061 rbuf = ND.randomid; 1062 break; 1063 default: 1064 errx(1, "impossible case for tempaddr display"); 1065 } 1066 for (j = 0; j < 8; j++) 1067 printf("%02x", rbuf[j]); 1068 } 1069 } 1070#endif 1071 if (ND.flags) { 1072 printf("\nFlags: "); 1073#ifdef ND6_IFF_IFDISABLED 1074 if ((ND.flags & ND6_IFF_IFDISABLED)) 1075 printf("disabled "); 1076#endif 1077 if ((ND.flags & ND6_IFF_PERFORMNUD)) 1078 printf("nud "); 1079#ifdef ND6_IFF_ACCEPT_RTADV 1080 if ((ND.flags & ND6_IFF_ACCEPT_RTADV)) 1081 printf("accept_rtadv "); 1082#endif 1083#ifdef ND6_IFF_AUTO_LINKLOCAL 1084 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL)) 1085 printf("auto_linklocal "); 1086#endif 1087#ifdef ND6_IFF_PREFER_SOURCE 1088 if ((ND.flags & ND6_IFF_PREFER_SOURCE)) 1089 printf("prefer_source "); 1090#endif 1091 } 1092 putc('\n', stdout); 1093#undef ND 1094 1095 close(s); 1096} 1097 1098#ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */ 1099#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ 1100#endif 1101 1102void 1103rtrlist() 1104{ 1105#ifdef ICMPV6CTL_ND6_DRLIST 1106 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST }; 1107 char *buf; 1108 struct in6_defrouter *p, *ep; 1109 size_t l; 1110 struct timeval time; 1111 1112 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1113 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1114 /*NOTREACHED*/ 1115 } 1116 if (l == 0) 1117 return; 1118 buf = malloc(l); 1119 if (!buf) { 1120 err(1, "malloc"); 1121 /*NOTREACHED*/ 1122 } 1123 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1124 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1125 /*NOTREACHED*/ 1126 } 1127 1128 ep = (struct in6_defrouter *)(buf + l); 1129 for (p = (struct in6_defrouter *)buf; p < ep; p++) { 1130 int rtpref; 1131 1132 if (getnameinfo((struct sockaddr *)&p->rtaddr, 1133 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0, 1134 (nflag ? NI_NUMERICHOST : 0)) != 0) 1135 strlcpy(host_buf, "?", sizeof(host_buf)); 1136 1137 printf("%s if=%s", host_buf, 1138 if_indextoname(p->if_index, ifix_buf)); 1139 printf(", flags=%s%s", 1140 p->flags & ND_RA_FLAG_MANAGED ? "M" : "", 1141 p->flags & ND_RA_FLAG_OTHER ? "O" : ""); 1142 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff; 1143 printf(", pref=%s", rtpref_str[rtpref]); 1144 1145 gettimeofday(&time, 0); 1146 if (p->expire == 0) 1147 printf(", expire=Never\n"); 1148 else 1149 printf(", expire=%s\n", 1150 sec2str(p->expire - time.tv_sec)); 1151 } 1152 free(buf); 1153#else 1154 struct in6_drlist dr; 1155 int s, i; 1156 struct timeval time; 1157 1158 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 1159 err(1, "socket"); 1160 /* NOTREACHED */ 1161 } 1162 bzero(&dr, sizeof(dr)); 1163 strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */ 1164 if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) { 1165 err(1, "ioctl(SIOCGDRLST_IN6)"); 1166 /* NOTREACHED */ 1167 } 1168#define DR dr.defrouter[i] 1169 for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) { 1170 struct sockaddr_in6 sin6; 1171 1172 bzero(&sin6, sizeof(sin6)); 1173 sin6.sin6_family = AF_INET6; 1174 sin6.sin6_len = sizeof(sin6); 1175 sin6.sin6_addr = DR.rtaddr; 1176 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf, 1177 sizeof(host_buf), NULL, 0, 1178 (nflag ? NI_NUMERICHOST : 0)); 1179 1180 printf("%s if=%s", host_buf, 1181 if_indextoname(DR.if_index, ifix_buf)); 1182 printf(", flags=%s%s", 1183 DR.flags & ND_RA_FLAG_MANAGED ? "M" : "", 1184 DR.flags & ND_RA_FLAG_OTHER ? "O" : ""); 1185 gettimeofday(&time, 0); 1186 if (DR.expire == 0) 1187 printf(", expire=Never\n"); 1188 else 1189 printf(", expire=%s\n", 1190 sec2str(DR.expire - time.tv_sec)); 1191 } 1192#undef DR 1193 close(s); 1194#endif 1195} 1196 1197void 1198plist() 1199{ 1200#ifdef ICMPV6CTL_ND6_PRLIST 1201 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST }; 1202 char *buf; 1203 struct in6_prefix *p, *ep, *n; 1204 struct sockaddr_in6 *advrtr; 1205 size_t l; 1206 struct timeval time; 1207 const int niflags = NI_NUMERICHOST; 1208 int ninflags = nflag ? NI_NUMERICHOST : 0; 1209 char namebuf[NI_MAXHOST]; 1210 1211 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1212 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1213 /*NOTREACHED*/ 1214 } 1215 buf = malloc(l); 1216 if (!buf) { 1217 err(1, "malloc"); 1218 /*NOTREACHED*/ 1219 } 1220 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1221 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1222 /*NOTREACHED*/ 1223 } 1224 1225 ep = (struct in6_prefix *)(buf + l); 1226 for (p = (struct in6_prefix *)buf; p < ep; p = n) { 1227 advrtr = (struct sockaddr_in6 *)(p + 1); 1228 n = (struct in6_prefix *)&advrtr[p->advrtrs]; 1229 1230 if (getnameinfo((struct sockaddr *)&p->prefix, 1231 p->prefix.sin6_len, namebuf, sizeof(namebuf), 1232 NULL, 0, niflags) != 0) 1233 strlcpy(namebuf, "?", sizeof(namebuf)); 1234 printf("%s/%d if=%s\n", namebuf, p->prefixlen, 1235 if_indextoname(p->if_index, ifix_buf)); 1236 1237 gettimeofday(&time, 0); 1238 /* 1239 * meaning of fields, especially flags, is very different 1240 * by origin. notify the difference to the users. 1241 */ 1242 printf("flags=%s%s%s%s%s", 1243 p->raflags.onlink ? "L" : "", 1244 p->raflags.autonomous ? "A" : "", 1245 (p->flags & NDPRF_ONLINK) != 0 ? "O" : "", 1246 (p->flags & NDPRF_DETACHED) != 0 ? "D" : "", 1247#ifdef NDPRF_HOME 1248 (p->flags & NDPRF_HOME) != 0 ? "H" : "" 1249#else 1250 "" 1251#endif 1252 ); 1253 if (p->vltime == ND6_INFINITE_LIFETIME) 1254 printf(" vltime=infinity"); 1255 else 1256 printf(" vltime=%lu", (unsigned long)p->vltime); 1257 if (p->pltime == ND6_INFINITE_LIFETIME) 1258 printf(", pltime=infinity"); 1259 else 1260 printf(", pltime=%lu", (unsigned long)p->pltime); 1261 if (p->expire == 0) 1262 printf(", expire=Never"); 1263 else if (p->expire >= time.tv_sec) 1264 printf(", expire=%s", 1265 sec2str(p->expire - time.tv_sec)); 1266 else 1267 printf(", expired"); 1268 printf(", ref=%d", p->refcnt); 1269 printf("\n"); 1270 /* 1271 * "advertising router" list is meaningful only if the prefix 1272 * information is from RA. 1273 */ 1274 if (p->advrtrs) { 1275 int j; 1276 struct sockaddr_in6 *sin6; 1277 1278 sin6 = advrtr; 1279 printf(" advertised by\n"); 1280 for (j = 0; j < p->advrtrs; j++) { 1281 struct in6_nbrinfo *nbi; 1282 1283 if (getnameinfo((struct sockaddr *)sin6, 1284 sin6->sin6_len, namebuf, sizeof(namebuf), 1285 NULL, 0, ninflags) != 0) 1286 strlcpy(namebuf, "?", sizeof(namebuf)); 1287 printf(" %s", namebuf); 1288 1289 nbi = getnbrinfo(&sin6->sin6_addr, 1290 p->if_index, 0); 1291 if (nbi) { 1292 switch (nbi->state) { 1293 case ND6_LLINFO_REACHABLE: 1294 case ND6_LLINFO_STALE: 1295 case ND6_LLINFO_DELAY: 1296 case ND6_LLINFO_PROBE: 1297 printf(" (reachable)\n"); 1298 break; 1299 default: 1300 printf(" (unreachable)\n"); 1301 } 1302 } else 1303 printf(" (no neighbor state)\n"); 1304 sin6++; 1305 } 1306 } else 1307 printf(" No advertising router\n"); 1308 } 1309 free(buf); 1310#else 1311 struct in6_prlist pr; 1312 int s, i; 1313 struct timeval time; 1314 1315 gettimeofday(&time, 0); 1316 1317 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 1318 err(1, "socket"); 1319 /* NOTREACHED */ 1320 } 1321 bzero(&pr, sizeof(pr)); 1322 strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */ 1323 if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) { 1324 err(1, "ioctl(SIOCGPRLST_IN6)"); 1325 /* NOTREACHED */ 1326 } 1327#define PR pr.prefix[i] 1328 for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) { 1329 struct sockaddr_in6 p6; 1330 char namebuf[NI_MAXHOST]; 1331 int niflags; 1332 1333#ifdef NDPRF_ONLINK 1334 p6 = PR.prefix; 1335#else 1336 memset(&p6, 0, sizeof(p6)); 1337 p6.sin6_family = AF_INET6; 1338 p6.sin6_len = sizeof(p6); 1339 p6.sin6_addr = PR.prefix; 1340#endif 1341 1342 /* 1343 * copy link index to sin6_scope_id field. 1344 * XXX: KAME specific. 1345 */ 1346 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) { 1347 u_int16_t linkid; 1348 1349 memcpy(&linkid, &p6.sin6_addr.s6_addr[2], 1350 sizeof(linkid)); 1351 linkid = ntohs(linkid); 1352 p6.sin6_scope_id = linkid; 1353 p6.sin6_addr.s6_addr[2] = 0; 1354 p6.sin6_addr.s6_addr[3] = 0; 1355 } 1356 1357 niflags = NI_NUMERICHOST; 1358 if (getnameinfo((struct sockaddr *)&p6, 1359 sizeof(p6), namebuf, sizeof(namebuf), 1360 NULL, 0, niflags)) { 1361 warnx("getnameinfo failed"); 1362 continue; 1363 } 1364 printf("%s/%d if=%s\n", namebuf, PR.prefixlen, 1365 if_indextoname(PR.if_index, ifix_buf)); 1366 1367 gettimeofday(&time, 0); 1368 /* 1369 * meaning of fields, especially flags, is very different 1370 * by origin. notify the difference to the users. 1371 */ 1372#if 0 1373 printf(" %s", 1374 PR.origin == PR_ORIG_RA ? "" : "advertise: "); 1375#endif 1376#ifdef NDPRF_ONLINK 1377 printf("flags=%s%s%s%s%s", 1378 PR.raflags.onlink ? "L" : "", 1379 PR.raflags.autonomous ? "A" : "", 1380 (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "", 1381 (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "", 1382#ifdef NDPRF_HOME 1383 (PR.flags & NDPRF_HOME) != 0 ? "H" : "" 1384#else 1385 "" 1386#endif 1387 ); 1388#else 1389 printf("flags=%s%s", 1390 PR.raflags.onlink ? "L" : "", 1391 PR.raflags.autonomous ? "A" : ""); 1392#endif 1393 if (PR.vltime == ND6_INFINITE_LIFETIME) 1394 printf(" vltime=infinity"); 1395 else 1396 printf(" vltime=%lu", PR.vltime); 1397 if (PR.pltime == ND6_INFINITE_LIFETIME) 1398 printf(", pltime=infinity"); 1399 else 1400 printf(", pltime=%lu", PR.pltime); 1401 if (PR.expire == 0) 1402 printf(", expire=Never"); 1403 else if (PR.expire >= time.tv_sec) 1404 printf(", expire=%s", 1405 sec2str(PR.expire - time.tv_sec)); 1406 else 1407 printf(", expired"); 1408#ifdef NDPRF_ONLINK 1409 printf(", ref=%d", PR.refcnt); 1410#endif 1411#if 0 1412 switch (PR.origin) { 1413 case PR_ORIG_RA: 1414 printf(", origin=RA"); 1415 break; 1416 case PR_ORIG_RR: 1417 printf(", origin=RR"); 1418 break; 1419 case PR_ORIG_STATIC: 1420 printf(", origin=static"); 1421 break; 1422 case PR_ORIG_KERNEL: 1423 printf(", origin=kernel"); 1424 break; 1425 default: 1426 printf(", origin=?"); 1427 break; 1428 } 1429#endif 1430 printf("\n"); 1431 /* 1432 * "advertising router" list is meaningful only if the prefix 1433 * information is from RA. 1434 */ 1435 if (0 && /* prefix origin is almost obsolted */ 1436 PR.origin != PR_ORIG_RA) 1437 ; 1438 else if (PR.advrtrs) { 1439 int j; 1440 printf(" advertised by\n"); 1441 for (j = 0; j < PR.advrtrs; j++) { 1442 struct sockaddr_in6 sin6; 1443 struct in6_nbrinfo *nbi; 1444 1445 bzero(&sin6, sizeof(sin6)); 1446 sin6.sin6_family = AF_INET6; 1447 sin6.sin6_len = sizeof(sin6); 1448 sin6.sin6_addr = PR.advrtr[j]; 1449 sin6.sin6_scope_id = PR.if_index; /* XXX */ 1450 getnameinfo((struct sockaddr *)&sin6, 1451 sin6.sin6_len, host_buf, 1452 sizeof(host_buf), NULL, 0, 1453 (nflag ? NI_NUMERICHOST : 0)); 1454 printf(" %s", host_buf); 1455 1456 nbi = getnbrinfo(&sin6.sin6_addr, 1457 PR.if_index, 0); 1458 if (nbi) { 1459 switch (nbi->state) { 1460 case ND6_LLINFO_REACHABLE: 1461 case ND6_LLINFO_STALE: 1462 case ND6_LLINFO_DELAY: 1463 case ND6_LLINFO_PROBE: 1464 printf(" (reachable)\n"); 1465 break; 1466 default: 1467 printf(" (unreachable)\n"); 1468 } 1469 } else 1470 printf(" (no neighbor state)\n"); 1471 } 1472 if (PR.advrtrs > DRLSTSIZ) 1473 printf(" and %d routers\n", 1474 PR.advrtrs - DRLSTSIZ); 1475 } else 1476 printf(" No advertising router\n"); 1477 } 1478#undef PR 1479 close(s); 1480#endif 1481} 1482 1483void 1484pfx_flush() 1485{ 1486 char dummyif[IFNAMSIZ+8]; 1487 int s; 1488 1489 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1490 err(1, "socket"); 1491 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1492 if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 1493 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 1494} 1495 1496void 1497rtr_flush() 1498{ 1499 char dummyif[IFNAMSIZ+8]; 1500 int s; 1501 1502 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1503 err(1, "socket"); 1504 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1505 if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 1506 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 1507 1508 close(s); 1509} 1510 1511void 1512harmonize_rtr() 1513{ 1514 char dummyif[IFNAMSIZ+8]; 1515 int s; 1516 1517 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1518 err(1, "socket"); 1519 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1520 if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) 1521 err(1, "ioctl(SIOCSNDFLUSH_IN6)"); 1522 1523 close(s); 1524} 1525 1526#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1527static void 1528setdefif(ifname) 1529 char *ifname; 1530{ 1531 struct in6_ndifreq ndifreq; 1532 unsigned int ifindex; 1533 1534 if (strcasecmp(ifname, "delete") == 0) 1535 ifindex = 0; 1536 else { 1537 if ((ifindex = if_nametoindex(ifname)) == 0) 1538 err(1, "failed to resolve i/f index for %s", ifname); 1539 } 1540 1541 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1542 err(1, "socket"); 1543 1544 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1545 ndifreq.ifindex = ifindex; 1546 1547 if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1548 err(1, "ioctl(SIOCSDEFIFACE_IN6)"); 1549 1550 close(s); 1551} 1552 1553static void 1554getdefif() 1555{ 1556 struct in6_ndifreq ndifreq; 1557 char ifname[IFNAMSIZ+8]; 1558 1559 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1560 err(1, "socket"); 1561 1562 memset(&ndifreq, 0, sizeof(ndifreq)); 1563 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1564 1565 if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1566 err(1, "ioctl(SIOCGDEFIFACE_IN6)"); 1567 1568 if (ndifreq.ifindex == 0) 1569 printf("No default interface.\n"); 1570 else { 1571 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL) 1572 err(1, "failed to resolve ifname for index %lu", 1573 ndifreq.ifindex); 1574 printf("ND default interface = %s\n", ifname); 1575 } 1576 1577 close(s); 1578} 1579#endif 1580 1581static char * 1582sec2str(total) 1583 time_t total; 1584{ 1585 static char result[256]; 1586 int days, hours, mins, secs; 1587 int first = 1; 1588 char *p = result; 1589 char *ep = &result[sizeof(result)]; 1590 int n; 1591 1592 days = total / 3600 / 24; 1593 hours = (total / 3600) % 24; 1594 mins = (total / 60) % 60; 1595 secs = total % 60; 1596 1597 if (days) { 1598 first = 0; 1599 n = snprintf(p, ep - p, "%dd", days); 1600 if (n < 0 || n >= ep - p) 1601 return "?"; 1602 p += n; 1603 } 1604 if (!first || hours) { 1605 first = 0; 1606 n = snprintf(p, ep - p, "%dh", hours); 1607 if (n < 0 || n >= ep - p) 1608 return "?"; 1609 p += n; 1610 } 1611 if (!first || mins) { 1612 first = 0; 1613 n = snprintf(p, ep - p, "%dm", mins); 1614 if (n < 0 || n >= ep - p) 1615 return "?"; 1616 p += n; 1617 } 1618 snprintf(p, ep - p, "%ds", secs); 1619 1620 return(result); 1621} 1622 1623/* 1624 * Print the timestamp 1625 * from tcpdump/util.c 1626 */ 1627static void 1628ts_print(tvp) 1629 const struct timeval *tvp; 1630{ 1631 int s; 1632 1633 /* Default */ 1634 s = (tvp->tv_sec + thiszone) % 86400; 1635 (void)printf("%02d:%02d:%02d.%06u ", 1636 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); 1637} 1638 1639#undef NEXTADDR 1640