ndp.c revision 1.2
1 /* $NetBSD: ndp.c,v 1.2 1999/07/06 13:20:04 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 /* 32 * Copyright (c) 1984, 1993 33 * The Regents of the University of California. All rights reserved. 34 * 35 * This code is derived from software contributed to Berkeley by 36 * Sun Microsystems, Inc. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 */ 66 67 /* 68 * Based on: 69 * "@(#) Copyright (c) 1984, 1993\n\ 70 * The Regents of the University of California. All rights reserved.\n"; 71 * 72 * "@(#)arp.c 8.2 (Berkeley) 1/2/94"; 73 */ 74 75 /* 76 * ndp - display, set, delete and flush neighbor cache 77 */ 78 79 80 #include <sys/param.h> 81 #include <sys/file.h> 82 #include <sys/ioctl.h> 83 #include <sys/socket.h> 84 #include <sys/sysctl.h> 85 #include <sys/time.h> 86 87 #include <net/if.h> 88 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 89 #include <net/if_var.h> 90 #endif /* __FreeBSD__ >= 3 */ 91 #include <net/if_dl.h> 92 #include <net/if_types.h> 93 #include <net/route.h> 94 95 #include <netinet/in.h> 96 #ifndef __NetBSD__ 97 #include <netinet/if_ether.h> 98 #endif 99 100 #include <netinet/icmp6.h> 101 #include <netinet6/in6_var.h> 102 #include <netinet6/nd6.h> 103 104 #include <arpa/inet.h> 105 106 #include <netdb.h> 107 #include <errno.h> 108 #include <nlist.h> 109 #include <stdio.h> 110 #include <string.h> 111 #include <paths.h> 112 #include <err.h> 113 #include <stdlib.h> 114 #include <fcntl.h> 115 #include <unistd.h> 116 #include "gmt2local.h" 117 118 extern int errno; 119 static int pid; 120 static int fflag; 121 static int nflag; 122 static int tflag; 123 static int32_t thiszone; /* time difference with gmt */ 124 static int s = -1; 125 static int repeat = 0; 126 127 char ntop_buf[INET6_ADDRSTRLEN]; /* inet_ntop() */ 128 char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 129 130 int main __P((int, char **)); 131 int file __P((char *)); 132 void getsocket __P((void)); 133 int set __P((int, char **)); 134 void get __P((char *)); 135 int delete __P((char *)); 136 void dump __P((struct in6_addr *)); 137 static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *addr, int ifindex)); 138 static char *ether_str __P((struct sockaddr_dl *)); 139 int ndp_ether_aton __P((char *, u_char *)); 140 void usage __P((void)); 141 int rtmsg __P((int)); 142 void ifinfo __P((char *)); 143 void rtrlist __P((void)); 144 void plist __P((void)); 145 void pfx_flush __P((void)); 146 void rtr_flush __P((void)); 147 void harmonize_rtr __P((void)); 148 void quit __P((char *)); 149 static char *sec2str __P((time_t t)); 150 static char *ether_str __P((struct sockaddr_dl *sdl)); 151 static void ts_print __P((const struct timeval *)); 152 153 int 154 main(argc, argv) 155 int argc; 156 char **argv; 157 { 158 int ch; 159 int aflag = 0, cflag = 0, dflag = 0, sflag = 0, Hflag = 0, 160 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0; 161 extern char *optarg; 162 extern int optind; 163 164 pid = getpid(); 165 thiszone = gmt2local(0); 166 while ((ch = getopt(argc, argv, "acndfiprstA:HPR")) != EOF) 167 switch ((char)ch) { 168 case 'a': 169 aflag = 1; 170 break; 171 case 'c': 172 fflag = 1; 173 cflag = 1; 174 break; 175 case 'd': 176 dflag = 1; 177 break; 178 case 'i' : 179 if (argc != 3) 180 usage(); 181 ifinfo(argv[2]); 182 exit(0); 183 case 'n': 184 nflag = 1; 185 continue; 186 case 'p': 187 pflag = 1; 188 break; 189 case 'f' : 190 if (argc != 3) 191 usage(); 192 file(argv[2]); 193 exit(0); 194 case 'r' : 195 rflag = 1; 196 break; 197 case 's': 198 sflag = 1; 199 break; 200 case 't': 201 tflag = 1; 202 break; 203 case 'A': 204 aflag = 1; 205 repeat = atoi(optarg); 206 if (repeat < 0) 207 usage(); 208 break; 209 case 'H' : 210 Hflag = 1; 211 break; 212 case 'P': 213 Pflag = 1; 214 break; 215 case 'R': 216 Rflag = 1; 217 break; 218 default: 219 usage(); 220 } 221 222 argc -= optind; 223 argv += optind; 224 225 if (aflag || cflag) { 226 dump(0); 227 exit(0); 228 } 229 if (dflag) { 230 if (argc != 1) 231 usage(); 232 delete(argv[0]); 233 } 234 if (pflag) { 235 plist(); 236 exit(0); 237 } 238 if (rflag) { 239 rtrlist(); 240 exit(0); 241 } 242 if (sflag) { 243 if (argc < 2 || argc > 4) 244 usage(); 245 exit(set(argc, argv) ? 1 : 0); 246 } 247 if (Hflag) { 248 harmonize_rtr(); 249 exit(0); 250 } 251 if (Pflag) { 252 pfx_flush(); 253 exit(0); 254 } 255 if (Rflag) { 256 rtr_flush(); 257 exit(0); 258 } 259 260 if (argc != 1) 261 usage(); 262 get(argv[0]); 263 exit(0); 264 } 265 266 /* 267 * Process a file to set standard ndp entries 268 */ 269 int 270 file(name) 271 char *name; 272 { 273 FILE *fp; 274 int i, retval; 275 char line[100], arg[5][50], *args[5]; 276 277 if ((fp = fopen(name, "r")) == NULL) { 278 fprintf(stderr, "ndp: cannot open %s\n", name); 279 exit(1); 280 } 281 args[0] = &arg[0][0]; 282 args[1] = &arg[1][0]; 283 args[2] = &arg[2][0]; 284 args[3] = &arg[3][0]; 285 args[4] = &arg[4][0]; 286 retval = 0; 287 while(fgets(line, 100, fp) != NULL) { 288 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2], 289 arg[3], arg[4]); 290 if (i < 2) { 291 fprintf(stderr, "ndp: bad line: %s\n", line); 292 retval = 1; 293 continue; 294 } 295 if (set(i, args)) 296 retval = 1; 297 } 298 fclose(fp); 299 return (retval); 300 } 301 302 void 303 getsocket() 304 { 305 if (s < 0) { 306 s = socket(PF_ROUTE, SOCK_RAW, 0); 307 if (s < 0) { 308 perror("ndp: socket"); 309 exit(1); 310 } 311 } 312 } 313 314 struct sockaddr_in so_mask = {8, 0, 0, { 0xffffffff}}; 315 struct sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m; 316 struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m; 317 int expire_time, flags, found_entry; 318 struct { 319 struct rt_msghdr m_rtm; 320 char m_space[512]; 321 } m_rtmsg; 322 323 /* 324 * Set an individual neighbor cache entry 325 */ 326 int 327 set(argc, argv) 328 int argc; 329 char **argv; 330 { 331 register struct sockaddr_in6 *sin = &sin_m; 332 register struct sockaddr_dl *sdl; 333 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 334 struct addrinfo hints, *res; 335 int gai_error; 336 u_char *ea; 337 char *host = argv[0], *eaddr = argv[1]; 338 339 getsocket(); 340 argc -= 2; 341 argv += 2; 342 sdl_m = blank_sdl; 343 sin_m = blank_sin; 344 345 bzero(&hints, sizeof(hints)); 346 hints.ai_family = AF_INET6; 347 gai_error = getaddrinfo(host, NULL, &hints, &res); 348 if (gai_error) { 349 fprintf(stderr, "ndp: %s: %s\n", host, 350 gai_strerror(gai_error)); 351 return 1; 352 } 353 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 354 ea = (u_char *)LLADDR(&sdl_m); 355 if (ndp_ether_aton(eaddr, ea) == 0) 356 sdl_m.sdl_alen = 6; 357 flags = expire_time = 0; 358 while (argc-- > 0) { 359 if (strncmp(argv[0], "temp", 4) == 0) { 360 struct timeval time; 361 gettimeofday(&time, 0); 362 expire_time = time.tv_sec + 20 * 60; 363 } 364 argv++; 365 } 366 tryagain: 367 if (rtmsg(RTM_GET) < 0) { 368 perror(host); 369 return (1); 370 } 371 sin = (struct sockaddr_in6 *)(rtm + 1); 372 sdl = (struct sockaddr_dl *)(sin->sin6_len + (char *)sin); 373 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 374 if (sdl->sdl_family == AF_LINK && 375 (rtm->rtm_flags & RTF_LLINFO) && 376 !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) { 377 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 378 case IFT_ISO88024: case IFT_ISO88025: 379 goto overwrite; 380 } 381 goto tryagain; 382 } 383 overwrite: 384 if (sdl->sdl_family != AF_LINK) { 385 printf("cannot intuit interface index and type for %s\n", host); 386 return (1); 387 } 388 sdl_m.sdl_type = sdl->sdl_type; 389 sdl_m.sdl_index = sdl->sdl_index; 390 return (rtmsg(RTM_ADD)); 391 } 392 393 /* 394 * Display an individual neighbor cache entry 395 */ 396 void 397 get(host) 398 char *host; 399 { 400 struct sockaddr_in6 *sin = &sin_m; 401 struct addrinfo hints, *res; 402 int gai_error; 403 404 sin_m = blank_sin; 405 bzero(&hints, sizeof(hints)); 406 hints.ai_family = AF_INET6; 407 gai_error = getaddrinfo(host, NULL, &hints, &res); 408 if (gai_error) { 409 fprintf(stderr, "ndp: %s: %s\n", host, 410 gai_strerror(gai_error)); 411 return; 412 } 413 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 414 dump(&sin->sin6_addr); 415 if (found_entry == 0) { 416 printf("%s (%s) -- no entry\n", 417 host, inet_ntop(AF_INET6, &sin->sin6_addr, ntop_buf, 418 sizeof(ntop_buf))); 419 exit(1); 420 } 421 } 422 423 /* 424 * Delete a neighbor cache entry 425 */ 426 int 427 delete(host) 428 char *host; 429 { 430 register struct sockaddr_in6 *sin = &sin_m; 431 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 432 struct sockaddr_dl *sdl; 433 struct addrinfo hints, *res; 434 int gai_error; 435 436 getsocket(); 437 sin_m = blank_sin; 438 439 bzero(&hints, sizeof(hints)); 440 hints.ai_family = AF_INET6; 441 gai_error = getaddrinfo(host, NULL, &hints, &res); 442 if (gai_error) { 443 fprintf(stderr, "ndp: %s: %s\n", host, 444 gai_strerror(gai_error)); 445 return 1; 446 } 447 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 448 /*tryagain:*/ 449 if (rtmsg(RTM_GET) < 0) { 450 perror(host); 451 return (1); 452 } 453 sin = (struct sockaddr_in6 *)(rtm + 1); 454 sdl = (struct sockaddr_dl *)(sin->sin6_len + (char *)sin); 455 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 456 if (sdl->sdl_family == AF_LINK && 457 (rtm->rtm_flags & RTF_LLINFO) && 458 !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) { 459 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 460 case IFT_ISO88024: case IFT_ISO88025: 461 goto delete; 462 } 463 } 464 delete: 465 if (sdl->sdl_family != AF_LINK) { 466 printf("cannot locate %s\n", host); 467 return (1); 468 } 469 if (rtmsg(RTM_DELETE) == 0) 470 printf("%s (%s) deleted\n", host, 471 inet_ntop(AF_INET6, &sin->sin6_addr, ntop_buf, 472 sizeof(ntop_buf))); 473 return 0; 474 } 475 476 /* 477 * Dump the entire neighbor cache 478 */ 479 void 480 dump(addr) 481 struct in6_addr *addr; 482 { 483 int mib[6]; 484 size_t needed; 485 char *host, *lim, *buf, *next; 486 struct rt_msghdr *rtm; 487 struct sockaddr_in6 *sin; 488 struct sockaddr_dl *sdl; 489 extern int h_errno; 490 struct hostent *hp; 491 struct in6_nbrinfo *nbi; 492 struct timeval time; 493 494 /* Print header */ 495 if (!tflag) 496 printf("%-29.29s %-18.18s %6.6s %-9.9s %2s %4s %4s\n", 497 "Neighbor", "Linklayer Address", "Netif", "Expire", 498 "St", "Flgs", "Prbs"); 499 500 again:; 501 mib[0] = CTL_NET; 502 mib[1] = PF_ROUTE; 503 mib[2] = 0; 504 mib[3] = AF_INET6; 505 mib[4] = NET_RT_FLAGS; 506 mib[5] = RTF_LLINFO; 507 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 508 quit("route-sysctl-estimate"); 509 if ((buf = malloc(needed)) == NULL) 510 quit("malloc"); 511 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 512 quit("actual retrieval of routing table"); 513 lim = buf + needed; 514 515 for (next = buf; next < lim; next += rtm->rtm_msglen) { 516 int isrouter = 0, prbs = 0; 517 518 rtm = (struct rt_msghdr *)next; 519 sin = (struct sockaddr_in6 *)(rtm + 1); 520 sdl = (struct sockaddr_dl *)(sin + 1); 521 if (addr) { 522 if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr)) 523 continue; 524 found_entry = 1; 525 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 526 continue; 527 if (fflag == 1) { 528 delete((char *)inet_ntop(AF_INET6, &sin->sin6_addr, 529 ntop_buf, sizeof(ntop_buf))); 530 continue; 531 } 532 host = NULL; 533 if (nflag == 0) { 534 hp = gethostbyaddr((char *)&sin->sin6_addr, 535 sizeof(struct in6_addr), AF_INET6); 536 if (hp) 537 host = hp->h_name; 538 } 539 if (host == NULL) { 540 inet_ntop(AF_INET6, &sin->sin6_addr, 541 ntop_buf, sizeof(ntop_buf)); 542 host = ntop_buf; 543 } 544 545 gettimeofday(&time, 0); 546 if (tflag) 547 ts_print(&time); 548 549 printf("%-29.29s %-18.18s %6.6s", host, 550 ether_str(sdl), 551 if_indextoname(sdl->sdl_index, ifix_buf)); 552 553 /* Print neighbor discovery specific informations */ 554 putchar(' '); 555 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index); 556 if (nbi) { 557 if (nbi->expire > time.tv_sec) { 558 printf(" %-9.9s", 559 sec2str(nbi->expire - time.tv_sec)); 560 } 561 else if (nbi->expire == 0) 562 printf(" %-9.9s", "permanent"); 563 else 564 printf(" %-9.9s", "expired"); 565 566 switch(nbi->state) { 567 case ND6_LLINFO_NOSTATE: 568 printf(" N"); 569 break; 570 case ND6_LLINFO_WAITDELETE: 571 printf(" W"); 572 break; 573 case ND6_LLINFO_INCOMPLETE: 574 printf(" I"); 575 break; 576 case ND6_LLINFO_REACHABLE: 577 printf(" R"); 578 break; 579 case ND6_LLINFO_STALE: 580 printf(" S"); 581 break; 582 case ND6_LLINFO_DELAY: 583 printf(" D"); 584 break; 585 case ND6_LLINFO_PROBE: 586 printf(" P"); 587 break; 588 default: 589 printf(" ?"); 590 break; 591 } 592 593 isrouter = nbi->isrouter; 594 prbs = nbi->asked; 595 } 596 else { 597 warnx("failed to get neighbor information"); 598 printf(" "); 599 } 600 601 /* other flags */ 602 putchar(' '); 603 { 604 u_char flgbuf[8], *p = flgbuf; 605 606 flgbuf[0] = '\0'; 607 if (isrouter) 608 p += sprintf((char *)p, "R"); 609 #ifndef RADISH 610 if (rtm->rtm_addrs & RTA_NETMASK) { 611 sin = (struct sockaddr_in6 *) 612 (sdl->sdl_len + (char *)sdl); 613 if (!IN6_IS_ADDR_ANY(&sin->sin6_addr)) 614 p += sprintf((char *)p, "P"); 615 if (sin->sin6_len != sizeof(struct sockaddr_in6)) 616 p += sprintf((char *)p, "W"); 617 } 618 #endif /*RADISH*/ 619 printf("%4s", flgbuf); 620 } 621 622 putchar(' '); 623 if (prbs) 624 printf("% 4d", prbs); 625 626 printf("\n"); 627 } 628 629 if (repeat) { 630 printf("\n"); 631 sleep(repeat); 632 goto again; 633 } 634 } 635 636 static struct in6_nbrinfo * 637 getnbrinfo(addr, ifindex) 638 struct in6_addr *addr; 639 int ifindex; 640 { 641 static struct in6_nbrinfo nbi; 642 int s; 643 644 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 645 err(1, "socket"); 646 647 bzero(&nbi, sizeof(nbi)); 648 if_indextoname(ifindex, nbi.ifname); 649 nbi.addr = *addr; 650 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 651 warn("ioctl"); 652 close(s); 653 return(NULL); 654 } 655 656 close(s); 657 return(&nbi); 658 } 659 660 static char * 661 ether_str(sdl) 662 struct sockaddr_dl *sdl; 663 { 664 static char ebuf[32]; 665 u_char *cp; 666 667 if (sdl->sdl_alen) { 668 cp = (u_char *)LLADDR(sdl); 669 sprintf(ebuf, "%x:%x:%x:%x:%x:%x", 670 cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); 671 } 672 else { 673 sprintf(ebuf, "(incomplete)"); 674 } 675 676 return(ebuf); 677 } 678 679 int 680 ndp_ether_aton(a, n) 681 char *a; 682 u_char *n; 683 { 684 int i, o[6]; 685 686 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 687 &o[3], &o[4], &o[5]); 688 if (i != 6) { 689 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 690 return (1); 691 } 692 for (i=0; i<6; i++) 693 n[i] = o[i]; 694 return (0); 695 } 696 697 void 698 usage() 699 { 700 printf("usage: ndp hostname\n"); 701 printf(" ndp -a[nt]\n"); 702 printf(" ndp [-nt] -A wait\n"); 703 printf(" ndp -c[nt]\n"); 704 printf(" ndp -d[nt] hostname\n"); 705 printf(" ndp -f[nt] filename\n"); 706 printf(" ndp -i interface\n"); 707 printf(" ndp -p\n"); 708 printf(" ndp -r\n"); 709 printf(" ndp -s hostname ether_addr [temp]\n"); 710 printf(" ndp -H\n"); 711 printf(" ndp -P\n"); 712 printf(" ndp -R\n"); 713 exit(1); 714 } 715 716 int 717 rtmsg(cmd) 718 int cmd; 719 { 720 static int seq; 721 int rlen; 722 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 723 register char *cp = m_rtmsg.m_space; 724 register int l; 725 726 errno = 0; 727 if (cmd == RTM_DELETE) 728 goto doit; 729 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 730 rtm->rtm_flags = flags; 731 rtm->rtm_version = RTM_VERSION; 732 733 switch (cmd) { 734 default: 735 fprintf(stderr, "ndp: internal wrong cmd\n"); 736 exit(1); 737 case RTM_ADD: 738 rtm->rtm_addrs |= RTA_GATEWAY; 739 rtm->rtm_rmx.rmx_expire = expire_time; 740 rtm->rtm_inits = RTV_EXPIRE; 741 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC); 742 /* FALLTHROUGH */ 743 case RTM_GET: 744 rtm->rtm_addrs |= RTA_DST; 745 } 746 #define NEXTADDR(w, s) \ 747 if (rtm->rtm_addrs & (w)) { \ 748 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);} 749 750 NEXTADDR(RTA_DST, sin_m); 751 NEXTADDR(RTA_GATEWAY, sdl_m); 752 NEXTADDR(RTA_NETMASK, so_mask); 753 754 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 755 doit: 756 l = rtm->rtm_msglen; 757 rtm->rtm_seq = ++seq; 758 rtm->rtm_type = cmd; 759 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 760 if (errno != ESRCH || cmd != RTM_DELETE) { 761 perror("writing to routing socket"); 762 return (-1); 763 } 764 } 765 do { 766 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 767 } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 768 if (l < 0) 769 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 770 strerror(errno)); 771 return (0); 772 } 773 774 void 775 ifinfo(ifname) 776 char *ifname; 777 { 778 struct in6_ndireq nd; 779 int s; 780 781 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 782 perror("ndp: socket"); 783 exit(1); 784 } 785 bzero(&nd, sizeof(nd)); 786 strcpy(nd.ifname, ifname); 787 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 788 perror("ioctl (SIOCGIFINFO_IN6)"); 789 exit(1); 790 } 791 #define ND nd.ndi 792 printf("linkmtu=%d", ND.linkmtu); 793 printf(", curhlim=%d", ND.chlim); 794 printf(", basereachable=%ds%dms", 795 ND.basereachable / 1000, ND.basereachable % 1000); 796 printf(", reachable=%ds", ND.reachable); 797 printf(", retrans=%ds%dms\n", ND.retrans / 1000, ND.retrans % 1000); 798 #undef ND 799 close(s); 800 } 801 802 void 803 rtrlist() 804 { 805 struct in6_drlist dr; 806 int s, i; 807 struct timeval time; 808 809 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 810 perror("ndp: socket"); 811 exit(1); 812 } 813 bzero(&dr, sizeof(dr)); 814 strcpy(dr.ifname, "lo0"); /* dummy */ 815 if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) { 816 perror("ioctl (SIOCGDRLST_IN6)"); 817 exit(1); 818 } 819 #define DR dr.defrouter[i] 820 for (i = 0 ; DR.if_index && i < PRLSTSIZ ; i++) { 821 printf("%s if=%s", inet_ntop(AF_INET6, &DR.rtaddr, 822 ntop_buf, sizeof(ntop_buf)), 823 if_indextoname(DR.if_index, ifix_buf)); 824 printf(", flags=%s%s", 825 DR.flags & ND_RA_FLAG_MANAGED ? "M" : "", 826 DR.flags & ND_RA_FLAG_OTHER ? "O" : ""); 827 gettimeofday(&time, 0); 828 if (DR.expire == 0) 829 printf(", expire=Never\n"); 830 else 831 printf(", expire=%s\n", 832 sec2str(DR.expire - time.tv_sec)); 833 } 834 #undef DR 835 close(s); 836 } 837 838 void 839 plist() 840 { 841 struct in6_prlist pr; 842 int s, i; 843 struct timeval time; 844 845 gettimeofday(&time, 0); 846 847 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 848 perror("ndp: socket"); 849 exit(1); 850 } 851 bzero(&pr, sizeof(pr)); 852 strcpy(pr.ifname, "lo0"); /* dummy */ 853 if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) { 854 perror("ioctl (SIOCGPRLST_IN6)"); 855 exit(1); 856 } 857 #define PR pr.prefix[i] 858 for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) { 859 printf("%s/%d if=%s\n", 860 inet_ntop(AF_INET6, &PR.prefix, ntop_buf, 861 sizeof(ntop_buf)), PR.prefixlen, 862 if_indextoname(PR.if_index, ifix_buf)); 863 gettimeofday(&time, 0); 864 printf(" flags=%s%s", 865 PR.raflags.onlink ? "L" : "", 866 PR.raflags.autonomous ? "A" : ""); 867 if (PR.vltime == ND6_INFINITE_LIFETIME) 868 printf(" vltime=infinity"); 869 else 870 printf(" vltime=%ld", (long)PR.vltime); 871 if (PR.pltime == ND6_INFINITE_LIFETIME) 872 printf(", pltime=infinity"); 873 else 874 printf(", pltime=%ld", (long)PR.pltime); 875 if (PR.expire == 0) 876 printf(", expire=Never\n"); 877 else if (PR.expire >= time.tv_sec) 878 printf(", expire=%s\n", 879 sec2str(PR.expire - time.tv_sec)); 880 else 881 printf(", expired\n"); 882 if (PR.advrtrs) { 883 int j; 884 printf(" advertised by\n"); 885 for (j = 0; j < PR.advrtrs; j++) { 886 printf(" %s\n", 887 inet_ntop(AF_INET6, &PR.advrtr[j], 888 ntop_buf, 889 sizeof(ntop_buf))); 890 } 891 if (PR.advrtrs > DRLSTSIZ) 892 printf(" and %d routers\n", 893 PR.advrtrs - DRLSTSIZ); 894 } 895 else 896 printf(" No advertising router\n"); 897 } 898 #undef PR 899 close(s); 900 } 901 902 void 903 pfx_flush() 904 { 905 char dummyif[IFNAMSIZ+8]; 906 int s; 907 908 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 909 err(1, "socket"); 910 strcpy(dummyif, "lo0"); /* dummy */ 911 if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 912 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 913 } 914 915 void 916 rtr_flush() 917 { 918 char dummyif[IFNAMSIZ+8]; 919 int s; 920 921 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 922 err(1, "socket"); 923 strcpy(dummyif, "lo0"); /* dummy */ 924 if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 925 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 926 } 927 928 void 929 harmonize_rtr() 930 { 931 char dummyif[IFNAMSIZ+8]; 932 int s; 933 934 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 935 perror("ndp: socket"); 936 exit(1); 937 } 938 strcpy(dummyif, "lo0"); /* dummy */ 939 if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) { 940 perror("ioctl (SIOCSNDFLUSH_IN6)"); 941 exit(1); 942 } 943 } 944 945 void 946 quit(msg) 947 char *msg; 948 { 949 fprintf(stderr, "%s\n", msg); 950 exit(1); 951 } 952 953 static char * 954 sec2str(total) 955 time_t total; 956 { 957 static char result[256]; 958 int days, hours, mins, secs; 959 int first = 1; 960 char *p = result; 961 962 days = total / 3600 / 24; 963 hours = (total / 3600) % 24; 964 mins = (total / 60) % 60; 965 secs = total % 60; 966 967 if (days) { 968 first = 0; 969 p += sprintf(p, "%dd", days); 970 } 971 if (!first || hours) { 972 first = 0; 973 p += sprintf(p, "%dh", hours); 974 } 975 if (!first || mins) { 976 first = 0; 977 p += sprintf(p, "%dm", mins); 978 } 979 sprintf(p, "%ds", secs); 980 981 return(result); 982 } 983 984 /* 985 * Print the timestamp 986 * from tcpdump/util.c 987 */ 988 static void 989 ts_print(tvp) 990 const struct timeval *tvp; 991 { 992 int s; 993 994 /* Default */ 995 s = (tvp->tv_sec + thiszone) % 86400; 996 (void)printf("%02d:%02d:%02d.%06u ", 997 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); 998 } 999
Indexes created Fri Sep 26 20:09:58 GMT 2025