1 /* $FreeBSD$ */ 2 /* $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-3-Clause 6 * 7 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the project nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 /* 35 * Copyright (c) 1984, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * This code is derived from software contributed to Berkeley by 39 * Sun Microsystems, Inc. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 */ 65 66 /* 67 * Based on: 68 * "@(#) Copyright (c) 1984, 1993\n\ 69 * The Regents of the University of California. All rights reserved.\n"; 70 * 71 * "@(#)arp.c 8.2 (Berkeley) 1/2/94"; 72 */ 73 74 /* 75 * ndp - display, set, delete and flush neighbor cache 76 */ 77 78 79 #include <sys/param.h> 80 #include <sys/file.h> 81 #include <sys/ioctl.h> 82 #include <sys/socket.h> 83 #include <sys/sysctl.h> 84 #include <sys/time.h> 85 #include <sys/queue.h> 86 87 #include <net/if.h> 88 #include <net/if_dl.h> 89 #include <net/if_types.h> 90 #include <net/route.h> 91 92 #include <netinet/in.h> 93 #include <netinet/if_ether.h> 94 95 #include <netinet/icmp6.h> 96 #include <netinet6/in6_var.h> 97 #include <netinet6/nd6.h> 98 99 #include <arpa/inet.h> 100 101 #include <ctype.h> 102 #include <netdb.h> 103 #include <errno.h> 104 #include <nlist.h> 105 #include <stdio.h> 106 #include <string.h> 107 #include <paths.h> 108 #include <err.h> 109 #include <stdlib.h> 110 #include <fcntl.h> 111 #include <unistd.h> 112 #include "gmt2local.h" 113 114 #define NEXTADDR(w, s) \ 115 if (rtm->rtm_addrs & (w)) { \ 116 bcopy((char *)&s, cp, sizeof(s)); \ 117 cp += SA_SIZE(&s); \ 118 } 119 120 static pid_t pid; 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 static char host_buf[NI_MAXHOST]; /* getnameinfo() */ 128 static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 129 130 static int file(char *); 131 static void getsocket(void); 132 static int set(int, char **); 133 static void get(char *); 134 static int delete(char *); 135 static void dump(struct sockaddr_in6 *, int); 136 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int); 137 static char *ether_str(struct sockaddr_dl *); 138 static int ndp_ether_aton(char *, u_char *); 139 static void usage(void); 140 static int rtmsg(int); 141 static void ifinfo(char *, int, char **); 142 static void rtrlist(void); 143 static void plist(void); 144 static void pfx_flush(void); 145 static void rtr_flush(void); 146 static void harmonize_rtr(void); 147 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 148 static void getdefif(void); 149 static void setdefif(char *); 150 #endif 151 static char *sec2str(time_t); 152 static void ts_print(const struct timeval *); 153 154 static char *rtpref_str[] = { 155 "medium", /* 00 */ 156 "high", /* 01 */ 157 "rsv", /* 10 */ 158 "low" /* 11 */ 159 }; 160 161 int 162 main(int argc, char **argv) 163 { 164 int ch, mode = 0; 165 char *arg = NULL; 166 167 pid = getpid(); 168 thiszone = gmt2local(0); 169 while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1) 170 switch (ch) { 171 case 'a': 172 case 'c': 173 case 'p': 174 case 'r': 175 case 'H': 176 case 'P': 177 case 'R': 178 case 's': 179 case 'I': 180 if (mode) { 181 usage(); 182 /*NOTREACHED*/ 183 } 184 mode = ch; 185 arg = NULL; 186 break; 187 case 'f': 188 exit(file(optarg) ? 1 : 0); 189 case 'd': 190 case 'i': 191 if (mode) { 192 usage(); 193 /*NOTREACHED*/ 194 } 195 mode = ch; 196 arg = optarg; 197 break; 198 case 'n': 199 nflag = 1; 200 break; 201 case 't': 202 tflag = 1; 203 break; 204 case 'A': 205 if (mode) { 206 usage(); 207 /*NOTREACHED*/ 208 } 209 mode = 'a'; 210 repeat = atoi(optarg); 211 if (repeat < 0) { 212 usage(); 213 /*NOTREACHED*/ 214 } 215 break; 216 default: 217 usage(); 218 } 219 220 argc -= optind; 221 argv += optind; 222 223 switch (mode) { 224 case 'a': 225 case 'c': 226 if (argc != 0) { 227 usage(); 228 /*NOTREACHED*/ 229 } 230 dump(0, mode == 'c'); 231 break; 232 case 'd': 233 if (argc != 0) { 234 usage(); 235 /*NOTREACHED*/ 236 } 237 delete(arg); 238 break; 239 case 'I': 240 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 241 if (argc > 1) { 242 usage(); 243 /*NOTREACHED*/ 244 } else if (argc == 1) { 245 if (strcmp(*argv, "delete") == 0 || 246 if_nametoindex(*argv)) 247 setdefif(*argv); 248 else 249 errx(1, "invalid interface %s", *argv); 250 } 251 getdefif(); /* always call it to print the result */ 252 break; 253 #else 254 errx(1, "not supported yet"); 255 /*NOTREACHED*/ 256 #endif 257 case 'p': 258 if (argc != 0) { 259 usage(); 260 /*NOTREACHED*/ 261 } 262 plist(); 263 break; 264 case 'i': 265 ifinfo(arg, argc, argv); 266 break; 267 case 'r': 268 if (argc != 0) { 269 usage(); 270 /*NOTREACHED*/ 271 } 272 rtrlist(); 273 break; 274 case 's': 275 if (argc < 2 || argc > 4) 276 usage(); 277 exit(set(argc, argv) ? 1 : 0); 278 case 'H': 279 if (argc != 0) { 280 usage(); 281 /*NOTREACHED*/ 282 } 283 harmonize_rtr(); 284 break; 285 case 'P': 286 if (argc != 0) { 287 usage(); 288 /*NOTREACHED*/ 289 } 290 pfx_flush(); 291 break; 292 case 'R': 293 if (argc != 0) { 294 usage(); 295 /*NOTREACHED*/ 296 } 297 rtr_flush(); 298 break; 299 case 0: 300 if (argc != 1) { 301 usage(); 302 /*NOTREACHED*/ 303 } 304 get(argv[0]); 305 break; 306 } 307 exit(0); 308 } 309 310 /* 311 * Process a file to set standard ndp entries 312 */ 313 static int 314 file(char *name) 315 { 316 FILE *fp; 317 int i, retval; 318 char line[100], arg[5][50], *args[5], *p; 319 320 if ((fp = fopen(name, "r")) == NULL) 321 err(1, "cannot open %s", name); 322 args[0] = &arg[0][0]; 323 args[1] = &arg[1][0]; 324 args[2] = &arg[2][0]; 325 args[3] = &arg[3][0]; 326 args[4] = &arg[4][0]; 327 retval = 0; 328 while (fgets(line, sizeof(line), fp) != NULL) { 329 if ((p = strchr(line, '#')) != NULL) 330 *p = '\0'; 331 for (p = line; isblank(*p); p++); 332 if (*p == '\n' || *p == '\0') 333 continue; 334 i = sscanf(line, "%49s %49s %49s %49s %49s", 335 arg[0], arg[1], arg[2], arg[3], arg[4]); 336 if (i < 2) { 337 warnx("bad line: %s", line); 338 retval = 1; 339 continue; 340 } 341 if (set(i, args)) 342 retval = 1; 343 } 344 fclose(fp); 345 return (retval); 346 } 347 348 static void 349 getsocket() 350 { 351 if (s < 0) { 352 s = socket(PF_ROUTE, SOCK_RAW, 0); 353 if (s < 0) { 354 err(1, "socket"); 355 /* NOTREACHED */ 356 } 357 } 358 } 359 360 static struct sockaddr_in6 so_mask = { 361 .sin6_len = sizeof(so_mask), 362 .sin6_family = AF_INET6 363 }; 364 static struct sockaddr_in6 blank_sin = { 365 .sin6_len = sizeof(blank_sin), 366 .sin6_family = AF_INET6 367 }; 368 static struct sockaddr_in6 sin_m; 369 static struct sockaddr_dl blank_sdl = { 370 .sdl_len = sizeof(blank_sdl), 371 .sdl_family = AF_LINK 372 }; 373 static struct sockaddr_dl sdl_m; 374 static time_t expire_time; 375 static int flags, found_entry; 376 static struct { 377 struct rt_msghdr m_rtm; 378 char m_space[512]; 379 } m_rtmsg; 380 381 /* 382 * Set an individual neighbor cache entry 383 */ 384 static int 385 set(int argc, char **argv) 386 { 387 register struct sockaddr_in6 *sin = &sin_m; 388 register struct sockaddr_dl *sdl; 389 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 390 struct addrinfo hints, *res; 391 int gai_error; 392 u_char *ea; 393 char *host = argv[0], *eaddr = argv[1]; 394 395 getsocket(); 396 argc -= 2; 397 argv += 2; 398 sdl_m = blank_sdl; 399 sin_m = blank_sin; 400 401 bzero(&hints, sizeof(hints)); 402 hints.ai_family = AF_INET6; 403 gai_error = getaddrinfo(host, NULL, &hints, &res); 404 if (gai_error) { 405 fprintf(stderr, "ndp: %s: %s\n", host, 406 gai_strerror(gai_error)); 407 return 1; 408 } 409 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 410 sin->sin6_scope_id = 411 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 412 ea = (u_char *)LLADDR(&sdl_m); 413 if (ndp_ether_aton(eaddr, ea) == 0) 414 sdl_m.sdl_alen = 6; 415 flags = expire_time = 0; 416 while (argc-- > 0) { 417 if (strncmp(argv[0], "temp", 4) == 0) { 418 struct timeval now; 419 420 gettimeofday(&now, 0); 421 expire_time = now.tv_sec + 20 * 60; 422 } else if (strncmp(argv[0], "proxy", 5) == 0) 423 flags |= RTF_ANNOUNCE; 424 argv++; 425 } 426 if (rtmsg(RTM_GET) < 0) { 427 errx(1, "RTM_GET(%s) failed", host); 428 /* NOTREACHED */ 429 } 430 sin = (struct sockaddr_in6 *)(rtm + 1); 431 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin); 432 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 433 if (sdl->sdl_family == AF_LINK && 434 !(rtm->rtm_flags & RTF_GATEWAY)) { 435 switch (sdl->sdl_type) { 436 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 437 case IFT_ISO88024: case IFT_ISO88025: 438 case IFT_L2VLAN: case IFT_BRIDGE: 439 goto overwrite; 440 } 441 } 442 fprintf(stderr, "set: cannot configure a new entry\n"); 443 return 1; 444 } 445 446 overwrite: 447 if (sdl->sdl_family != AF_LINK) { 448 printf("cannot intuit interface index and type for %s\n", host); 449 return (1); 450 } 451 sdl_m.sdl_type = sdl->sdl_type; 452 sdl_m.sdl_index = sdl->sdl_index; 453 return (rtmsg(RTM_ADD)); 454 } 455 456 /* 457 * Display an individual neighbor cache entry 458 */ 459 static void 460 get(char *host) 461 { 462 struct sockaddr_in6 *sin = &sin_m; 463 struct addrinfo hints, *res; 464 int gai_error; 465 466 sin_m = blank_sin; 467 bzero(&hints, sizeof(hints)); 468 hints.ai_family = AF_INET6; 469 gai_error = getaddrinfo(host, NULL, &hints, &res); 470 if (gai_error) { 471 fprintf(stderr, "ndp: %s: %s\n", host, 472 gai_strerror(gai_error)); 473 return; 474 } 475 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 476 sin->sin6_scope_id = 477 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 478 dump(sin, 0); 479 if (found_entry == 0) { 480 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 481 sizeof(host_buf), NULL ,0, 482 (nflag ? NI_NUMERICHOST : 0)); 483 printf("%s (%s) -- no entry\n", host, host_buf); 484 exit(1); 485 } 486 } 487 488 /* 489 * Delete a neighbor cache entry 490 */ 491 static int 492 delete(char *host) 493 { 494 struct sockaddr_in6 *sin = &sin_m; 495 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 496 register char *cp = m_rtmsg.m_space; 497 struct sockaddr_dl *sdl; 498 struct addrinfo hints, *res; 499 int gai_error; 500 501 getsocket(); 502 sin_m = blank_sin; 503 504 bzero(&hints, sizeof(hints)); 505 hints.ai_family = AF_INET6; 506 gai_error = getaddrinfo(host, NULL, &hints, &res); 507 if (gai_error) { 508 fprintf(stderr, "ndp: %s: %s\n", host, 509 gai_strerror(gai_error)); 510 return 1; 511 } 512 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 513 sin->sin6_scope_id = 514 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 515 if (rtmsg(RTM_GET) < 0) { 516 errx(1, "RTM_GET(%s) failed", host); 517 /* NOTREACHED */ 518 } 519 sin = (struct sockaddr_in6 *)(rtm + 1); 520 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin); 521 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 522 if (sdl->sdl_family == AF_LINK && 523 !(rtm->rtm_flags & RTF_GATEWAY)) { 524 goto delete; 525 } 526 fprintf(stderr, "delete: cannot delete non-NDP entry\n"); 527 return 1; 528 } 529 530 delete: 531 if (sdl->sdl_family != AF_LINK) { 532 printf("cannot locate %s\n", host); 533 return (1); 534 } 535 /* 536 * need to reinit the field because it has rt_key 537 * but we want the actual address 538 */ 539 NEXTADDR(RTA_DST, sin_m); 540 rtm->rtm_flags |= RTF_LLDATA; 541 if (rtmsg(RTM_DELETE) == 0) { 542 getnameinfo((struct sockaddr *)sin, 543 sin->sin6_len, host_buf, 544 sizeof(host_buf), NULL, 0, 545 (nflag ? NI_NUMERICHOST : 0)); 546 printf("%s (%s) deleted\n", host, host_buf); 547 } 548 549 return 0; 550 } 551 552 #define W_ADDR 36 553 #define W_LL 17 554 #define W_IF 6 555 556 /* 557 * Dump the entire neighbor cache 558 */ 559 static void 560 dump(struct sockaddr_in6 *addr, int cflag) 561 { 562 int mib[6]; 563 size_t needed; 564 char *lim, *buf, *next; 565 struct rt_msghdr *rtm; 566 struct sockaddr_in6 *sin; 567 struct sockaddr_dl *sdl; 568 extern int h_errno; 569 struct timeval now; 570 u_long expire; 571 int addrwidth; 572 int llwidth; 573 int ifwidth; 574 char flgbuf[8]; 575 char *ifname; 576 577 /* Print header */ 578 if (!tflag && !cflag) 579 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n", 580 W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", 581 W_IF, W_IF, "Netif", "Expire", "S", "Flags"); 582 583 again:; 584 mib[0] = CTL_NET; 585 mib[1] = PF_ROUTE; 586 mib[2] = 0; 587 mib[3] = AF_INET6; 588 mib[4] = NET_RT_FLAGS; 589 #ifdef RTF_LLINFO 590 mib[5] = RTF_LLINFO; 591 #else 592 mib[5] = 0; 593 #endif 594 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 595 err(1, "sysctl(PF_ROUTE estimate)"); 596 if (needed > 0) { 597 if ((buf = malloc(needed)) == NULL) 598 err(1, "malloc"); 599 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 600 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); 601 lim = buf + needed; 602 } else 603 buf = lim = NULL; 604 605 for (next = buf; next && next < lim; next += rtm->rtm_msglen) { 606 int isrouter = 0, prbs = 0; 607 608 rtm = (struct rt_msghdr *)next; 609 sin = (struct sockaddr_in6 *)(rtm + 1); 610 sdl = (struct sockaddr_dl *)((char *)sin + 611 ALIGN(sin->sin6_len)); 612 613 /* 614 * Some OSes can produce a route that has the LINK flag but 615 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD 616 * and BSD/OS, where xx is not the interface identifier on 617 * lo0). Such routes entry would annoy getnbrinfo() below, 618 * so we skip them. 619 * XXX: such routes should have the GATEWAY flag, not the 620 * LINK flag. However, there is rotten routing software 621 * that advertises all routes that have the GATEWAY flag. 622 * Thus, KAME kernel intentionally does not set the LINK flag. 623 * What is to be fixed is not ndp, but such routing software 624 * (and the kernel workaround)... 625 */ 626 if (sdl->sdl_family != AF_LINK) 627 continue; 628 629 if (!(rtm->rtm_flags & RTF_HOST)) 630 continue; 631 632 if (addr) { 633 if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr, 634 &sin->sin6_addr) == 0 || 635 addr->sin6_scope_id != sin->sin6_scope_id) 636 continue; 637 found_entry = 1; 638 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 639 continue; 640 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || 641 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { 642 /* XXX: should scope id be filled in the kernel? */ 643 if (sin->sin6_scope_id == 0) 644 sin->sin6_scope_id = sdl->sdl_index; 645 } 646 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 647 sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); 648 if (cflag) { 649 #ifdef RTF_WASCLONED 650 if (rtm->rtm_flags & RTF_WASCLONED) 651 delete(host_buf); 652 #elif defined(RTF_CLONED) 653 if (rtm->rtm_flags & RTF_CLONED) 654 delete(host_buf); 655 #else 656 if (rtm->rtm_flags & RTF_PINNED) 657 continue; 658 delete(host_buf); 659 #endif 660 continue; 661 } 662 gettimeofday(&now, 0); 663 if (tflag) 664 ts_print(&now); 665 666 addrwidth = strlen(host_buf); 667 if (addrwidth < W_ADDR) 668 addrwidth = W_ADDR; 669 llwidth = strlen(ether_str(sdl)); 670 if (W_ADDR + W_LL - addrwidth > llwidth) 671 llwidth = W_ADDR + W_LL - addrwidth; 672 ifname = if_indextoname(sdl->sdl_index, ifix_buf); 673 if (!ifname) 674 ifname = "?"; 675 ifwidth = strlen(ifname); 676 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) 677 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; 678 679 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, 680 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname); 681 682 /* Print neighbor discovery specific information */ 683 expire = rtm->rtm_rmx.rmx_expire; 684 if (expire > now.tv_sec) 685 printf(" %-9.9s", sec2str(expire - now.tv_sec)); 686 else if (expire == 0) 687 printf(" %-9.9s", "permanent"); 688 else 689 printf(" %-9.9s", "expired"); 690 691 switch (rtm->rtm_rmx.rmx_state) { 692 case ND6_LLINFO_NOSTATE: 693 printf(" N"); 694 break; 695 #ifdef ND6_LLINFO_WAITDELETE 696 case ND6_LLINFO_WAITDELETE: 697 printf(" W"); 698 break; 699 #endif 700 case ND6_LLINFO_INCOMPLETE: 701 printf(" I"); 702 break; 703 case ND6_LLINFO_REACHABLE: 704 printf(" R"); 705 break; 706 case ND6_LLINFO_STALE: 707 printf(" S"); 708 break; 709 case ND6_LLINFO_DELAY: 710 printf(" D"); 711 break; 712 case ND6_LLINFO_PROBE: 713 printf(" P"); 714 break; 715 default: 716 printf(" ?"); 717 break; 718 } 719 720 isrouter = rtm->rtm_flags & RTF_GATEWAY; 721 prbs = rtm->rtm_rmx.rmx_pksent; 722 723 /* 724 * other flags. R: router, P: proxy, W: ?? 725 */ 726 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 727 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 728 isrouter ? "R" : "", 729 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 730 } else { 731 #if 0 /* W and P are mystery even for us */ 732 sin = (struct sockaddr_in6 *) 733 (sdl->sdl_len + (char *)sdl); 734 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 735 isrouter ? "R" : "", 736 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "", 737 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "", 738 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 739 #else 740 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 741 isrouter ? "R" : "", 742 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 743 #endif 744 } 745 printf(" %s", flgbuf); 746 747 if (prbs) 748 printf(" %d", prbs); 749 750 printf("\n"); 751 } 752 if (buf != NULL) 753 free(buf); 754 755 if (repeat) { 756 printf("\n"); 757 fflush(stdout); 758 sleep(repeat); 759 goto again; 760 } 761 } 762 763 static struct in6_nbrinfo * 764 getnbrinfo(struct in6_addr *addr, int ifindex, int warning) 765 { 766 static struct in6_nbrinfo nbi; 767 int s; 768 769 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 770 err(1, "socket"); 771 772 bzero(&nbi, sizeof(nbi)); 773 if_indextoname(ifindex, nbi.ifname); 774 nbi.addr = *addr; 775 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 776 if (warning) 777 warn("ioctl(SIOCGNBRINFO_IN6)"); 778 close(s); 779 return(NULL); 780 } 781 782 close(s); 783 return(&nbi); 784 } 785 786 static char * 787 ether_str(struct sockaddr_dl *sdl) 788 { 789 static char hbuf[NI_MAXHOST]; 790 791 if (sdl->sdl_alen == ETHER_ADDR_LEN) { 792 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)), 793 sizeof(hbuf)); 794 } else if (sdl->sdl_alen) { 795 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 796 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n); 797 } else 798 snprintf(hbuf, sizeof(hbuf), "(incomplete)"); 799 800 return(hbuf); 801 } 802 803 static int 804 ndp_ether_aton(char *a, u_char *n) 805 { 806 int i, o[6]; 807 808 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 809 &o[3], &o[4], &o[5]); 810 if (i != 6) { 811 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 812 return (1); 813 } 814 for (i = 0; i < 6; i++) 815 n[i] = o[i]; 816 return (0); 817 } 818 819 static void 820 usage() 821 { 822 printf("usage: ndp [-nt] hostname\n"); 823 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n"); 824 printf(" ndp [-nt] -A wait\n"); 825 printf(" ndp [-nt] -d hostname\n"); 826 printf(" ndp [-nt] -f filename\n"); 827 printf(" ndp [-nt] -i interface [flags...]\n"); 828 #ifdef SIOCSDEFIFACE_IN6 829 printf(" ndp [-nt] -I [interface|delete]\n"); 830 #endif 831 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n"); 832 exit(1); 833 } 834 835 static int 836 rtmsg(int cmd) 837 { 838 static int seq; 839 int rlen; 840 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 841 register char *cp = m_rtmsg.m_space; 842 register int l; 843 844 errno = 0; 845 if (cmd == RTM_DELETE) 846 goto doit; 847 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 848 rtm->rtm_flags = flags; 849 rtm->rtm_version = RTM_VERSION; 850 851 switch (cmd) { 852 default: 853 fprintf(stderr, "ndp: internal wrong cmd\n"); 854 exit(1); 855 case RTM_ADD: 856 rtm->rtm_addrs |= RTA_GATEWAY; 857 if (expire_time) { 858 rtm->rtm_rmx.rmx_expire = expire_time; 859 rtm->rtm_inits = RTV_EXPIRE; 860 } 861 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); 862 #if 0 /* we don't support ipv6addr/128 type proxying */ 863 if (rtm->rtm_flags & RTF_ANNOUNCE) { 864 rtm->rtm_flags &= ~RTF_HOST; 865 rtm->rtm_addrs |= RTA_NETMASK; 866 } 867 #endif 868 /* FALLTHROUGH */ 869 case RTM_GET: 870 rtm->rtm_addrs |= RTA_DST; 871 } 872 873 NEXTADDR(RTA_DST, sin_m); 874 NEXTADDR(RTA_GATEWAY, sdl_m); 875 #if 0 /* we don't support ipv6addr/128 type proxying */ 876 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 877 NEXTADDR(RTA_NETMASK, so_mask); 878 #endif 879 880 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 881 doit: 882 l = rtm->rtm_msglen; 883 rtm->rtm_seq = ++seq; 884 rtm->rtm_type = cmd; 885 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 886 if (errno != ESRCH || cmd != RTM_DELETE) { 887 err(1, "writing to routing socket"); 888 /* NOTREACHED */ 889 } 890 } 891 do { 892 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 893 } while (l > 0 && (rtm->rtm_type != cmd || rtm->rtm_seq != seq || 894 rtm->rtm_pid != pid)); 895 if (l < 0) 896 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 897 strerror(errno)); 898 return (0); 899 } 900 901 static void 902 ifinfo(char *ifname, int argc, char **argv) 903 { 904 struct in6_ndireq nd; 905 int i, s; 906 u_int32_t newflags; 907 #ifdef IPV6CTL_USETEMPADDR 908 u_int8_t nullbuf[8]; 909 #endif 910 911 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 912 err(1, "socket"); 913 /* NOTREACHED */ 914 } 915 bzero(&nd, sizeof(nd)); 916 strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); 917 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 918 err(1, "ioctl(SIOCGIFINFO_IN6)"); 919 /* NOTREACHED */ 920 } 921 #define ND nd.ndi 922 newflags = ND.flags; 923 for (i = 0; i < argc; i++) { 924 int clear = 0; 925 char *cp = argv[i]; 926 927 if (*cp == '-') { 928 clear = 1; 929 cp++; 930 } 931 932 #define SETFLAG(s, f) do { \ 933 if (strcmp(cp, (s)) == 0) { \ 934 if (clear) \ 935 newflags &= ~(f); \ 936 else \ 937 newflags |= (f); \ 938 } \ 939 } while (0) 940 /* 941 * XXX: this macro is not 100% correct, in that it matches "nud" against 942 * "nudbogus". But we just let it go since this is minor. 943 */ 944 #define SETVALUE(f, v) do { \ 945 char *valptr; \ 946 unsigned long newval; \ 947 v = 0; /* unspecified */ \ 948 if (strncmp(cp, f, strlen(f)) == 0) { \ 949 valptr = strchr(cp, '='); \ 950 if (valptr == NULL) \ 951 err(1, "syntax error in %s field", (f)); \ 952 errno = 0; \ 953 newval = strtoul(++valptr, NULL, 0); \ 954 if (errno) \ 955 err(1, "syntax error in %s's value", (f)); \ 956 v = newval; \ 957 } \ 958 } while (0) 959 960 SETFLAG("disabled", ND6_IFF_IFDISABLED); 961 SETFLAG("nud", ND6_IFF_PERFORMNUD); 962 #ifdef ND6_IFF_ACCEPT_RTADV 963 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV); 964 #endif 965 #ifdef ND6_IFF_AUTO_LINKLOCAL 966 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL); 967 #endif 968 #ifdef ND6_IFF_NO_PREFER_IFACE 969 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE); 970 #endif 971 SETVALUE("basereachable", ND.basereachable); 972 SETVALUE("retrans", ND.retrans); 973 SETVALUE("curhlim", ND.chlim); 974 975 ND.flags = newflags; 976 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) { 977 err(1, "ioctl(SIOCSIFINFO_IN6)"); 978 /* NOTREACHED */ 979 } 980 #undef SETFLAG 981 #undef SETVALUE 982 } 983 984 if (!ND.initialized) { 985 errx(1, "%s: not initialized yet", ifname); 986 /* NOTREACHED */ 987 } 988 989 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 990 err(1, "ioctl(SIOCGIFINFO_IN6)"); 991 /* NOTREACHED */ 992 } 993 printf("linkmtu=%d", ND.linkmtu); 994 printf(", maxmtu=%d", ND.maxmtu); 995 printf(", curhlim=%d", ND.chlim); 996 printf(", basereachable=%ds%dms", 997 ND.basereachable / 1000, ND.basereachable % 1000); 998 printf(", reachable=%ds", ND.reachable); 999 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); 1000 #ifdef IPV6CTL_USETEMPADDR 1001 memset(nullbuf, 0, sizeof(nullbuf)); 1002 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) { 1003 int j; 1004 u_int8_t *rbuf; 1005 1006 for (i = 0; i < 3; i++) { 1007 switch (i) { 1008 case 0: 1009 printf("\nRandom seed(0): "); 1010 rbuf = ND.randomseed0; 1011 break; 1012 case 1: 1013 printf("\nRandom seed(1): "); 1014 rbuf = ND.randomseed1; 1015 break; 1016 case 2: 1017 printf("\nRandom ID: "); 1018 rbuf = ND.randomid; 1019 break; 1020 default: 1021 errx(1, "impossible case for tempaddr display"); 1022 } 1023 for (j = 0; j < 8; j++) 1024 printf("%02x", rbuf[j]); 1025 } 1026 } 1027 #endif /* IPV6CTL_USETEMPADDR */ 1028 if (ND.flags) { 1029 printf("\nFlags: "); 1030 #ifdef ND6_IFF_IFDISABLED 1031 if ((ND.flags & ND6_IFF_IFDISABLED)) 1032 printf("disabled "); 1033 #endif 1034 if ((ND.flags & ND6_IFF_PERFORMNUD)) 1035 printf("nud "); 1036 #ifdef ND6_IFF_ACCEPT_RTADV 1037 if ((ND.flags & ND6_IFF_ACCEPT_RTADV)) 1038 printf("accept_rtadv "); 1039 #endif 1040 #ifdef ND6_IFF_AUTO_LINKLOCAL 1041 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL)) 1042 printf("auto_linklocal "); 1043 #endif 1044 #ifdef ND6_IFF_NO_PREFER_IFACE 1045 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE)) 1046 printf("no_prefer_iface "); 1047 #endif 1048 } 1049 putc('\n', stdout); 1050 #undef ND 1051 1052 close(s); 1053 } 1054 1055 #ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */ 1056 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ 1057 #endif 1058 1059 static void 1060 rtrlist() 1061 { 1062 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST }; 1063 char *buf; 1064 struct in6_defrouter *p, *ep; 1065 size_t l; 1066 struct timeval now; 1067 1068 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1069 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1070 /*NOTREACHED*/ 1071 } 1072 if (l == 0) 1073 return; 1074 buf = malloc(l); 1075 if (!buf) { 1076 err(1, "malloc"); 1077 /*NOTREACHED*/ 1078 } 1079 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1080 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1081 /*NOTREACHED*/ 1082 } 1083 1084 ep = (struct in6_defrouter *)(buf + l); 1085 for (p = (struct in6_defrouter *)buf; p < ep; p++) { 1086 int rtpref; 1087 1088 if (getnameinfo((struct sockaddr *)&p->rtaddr, 1089 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0, 1090 (nflag ? NI_NUMERICHOST : 0)) != 0) 1091 strlcpy(host_buf, "?", sizeof(host_buf)); 1092 1093 printf("%s if=%s", host_buf, 1094 if_indextoname(p->if_index, ifix_buf)); 1095 printf(", flags=%s%s", 1096 p->flags & ND_RA_FLAG_MANAGED ? "M" : "", 1097 p->flags & ND_RA_FLAG_OTHER ? "O" : ""); 1098 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff; 1099 printf(", pref=%s", rtpref_str[rtpref]); 1100 1101 gettimeofday(&now, 0); 1102 if (p->expire == 0) 1103 printf(", expire=Never\n"); 1104 else 1105 printf(", expire=%s\n", 1106 sec2str(p->expire - now.tv_sec)); 1107 } 1108 free(buf); 1109 } 1110 1111 static void 1112 plist() 1113 { 1114 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST }; 1115 char *buf; 1116 struct in6_prefix *p, *ep, *n; 1117 struct sockaddr_in6 *advrtr; 1118 size_t l; 1119 struct timeval now; 1120 const int niflags = NI_NUMERICHOST; 1121 int ninflags = nflag ? NI_NUMERICHOST : 0; 1122 char namebuf[NI_MAXHOST]; 1123 1124 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1125 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1126 /*NOTREACHED*/ 1127 } 1128 buf = malloc(l); 1129 if (!buf) { 1130 err(1, "malloc"); 1131 /*NOTREACHED*/ 1132 } 1133 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1134 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1135 /*NOTREACHED*/ 1136 } 1137 1138 ep = (struct in6_prefix *)(buf + l); 1139 for (p = (struct in6_prefix *)buf; p < ep; p = n) { 1140 advrtr = (struct sockaddr_in6 *)(p + 1); 1141 n = (struct in6_prefix *)&advrtr[p->advrtrs]; 1142 1143 if (getnameinfo((struct sockaddr *)&p->prefix, 1144 p->prefix.sin6_len, namebuf, sizeof(namebuf), 1145 NULL, 0, niflags) != 0) 1146 strlcpy(namebuf, "?", sizeof(namebuf)); 1147 printf("%s/%d if=%s\n", namebuf, p->prefixlen, 1148 if_indextoname(p->if_index, ifix_buf)); 1149 1150 gettimeofday(&now, 0); 1151 /* 1152 * meaning of fields, especially flags, is very different 1153 * by origin. notify the difference to the users. 1154 */ 1155 printf("flags=%s%s%s%s%s", 1156 p->raflags.onlink ? "L" : "", 1157 p->raflags.autonomous ? "A" : "", 1158 (p->flags & NDPRF_ONLINK) != 0 ? "O" : "", 1159 (p->flags & NDPRF_DETACHED) != 0 ? "D" : "", 1160 #ifdef NDPRF_HOME 1161 (p->flags & NDPRF_HOME) != 0 ? "H" : "" 1162 #else 1163 "" 1164 #endif 1165 ); 1166 if (p->vltime == ND6_INFINITE_LIFETIME) 1167 printf(" vltime=infinity"); 1168 else 1169 printf(" vltime=%lu", (unsigned long)p->vltime); 1170 if (p->pltime == ND6_INFINITE_LIFETIME) 1171 printf(", pltime=infinity"); 1172 else 1173 printf(", pltime=%lu", (unsigned long)p->pltime); 1174 if (p->expire == 0) 1175 printf(", expire=Never"); 1176 else if (p->expire >= now.tv_sec) 1177 printf(", expire=%s", 1178 sec2str(p->expire - now.tv_sec)); 1179 else 1180 printf(", expired"); 1181 printf(", ref=%d", p->refcnt); 1182 printf("\n"); 1183 /* 1184 * "advertising router" list is meaningful only if the prefix 1185 * information is from RA. 1186 */ 1187 if (p->advrtrs) { 1188 int j; 1189 struct sockaddr_in6 *sin6; 1190 1191 sin6 = advrtr; 1192 printf(" advertised by\n"); 1193 for (j = 0; j < p->advrtrs; j++) { 1194 struct in6_nbrinfo *nbi; 1195 1196 if (getnameinfo((struct sockaddr *)sin6, 1197 sin6->sin6_len, namebuf, sizeof(namebuf), 1198 NULL, 0, ninflags) != 0) 1199 strlcpy(namebuf, "?", sizeof(namebuf)); 1200 printf(" %s", namebuf); 1201 1202 nbi = getnbrinfo(&sin6->sin6_addr, 1203 p->if_index, 0); 1204 if (nbi) { 1205 switch (nbi->state) { 1206 case ND6_LLINFO_REACHABLE: 1207 case ND6_LLINFO_STALE: 1208 case ND6_LLINFO_DELAY: 1209 case ND6_LLINFO_PROBE: 1210 printf(" (reachable)\n"); 1211 break; 1212 default: 1213 printf(" (unreachable)\n"); 1214 } 1215 } else 1216 printf(" (no neighbor state)\n"); 1217 sin6++; 1218 } 1219 } else 1220 printf(" No advertising router\n"); 1221 } 1222 free(buf); 1223 } 1224 1225 static void 1226 pfx_flush() 1227 { 1228 char dummyif[IFNAMSIZ+8]; 1229 int s; 1230 1231 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1232 err(1, "socket"); 1233 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1234 if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 1235 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 1236 } 1237 1238 static void 1239 rtr_flush() 1240 { 1241 char dummyif[IFNAMSIZ+8]; 1242 int s; 1243 1244 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1245 err(1, "socket"); 1246 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1247 if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 1248 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 1249 1250 close(s); 1251 } 1252 1253 static void 1254 harmonize_rtr() 1255 { 1256 char dummyif[IFNAMSIZ+8]; 1257 int s; 1258 1259 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1260 err(1, "socket"); 1261 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1262 if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) 1263 err(1, "ioctl(SIOCSNDFLUSH_IN6)"); 1264 1265 close(s); 1266 } 1267 1268 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1269 static void 1270 setdefif(char *ifname) 1271 { 1272 struct in6_ndifreq ndifreq; 1273 unsigned int ifindex; 1274 1275 if (strcasecmp(ifname, "delete") == 0) 1276 ifindex = 0; 1277 else { 1278 if ((ifindex = if_nametoindex(ifname)) == 0) 1279 err(1, "failed to resolve i/f index for %s", ifname); 1280 } 1281 1282 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1283 err(1, "socket"); 1284 1285 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1286 ndifreq.ifindex = ifindex; 1287 1288 if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1289 err(1, "ioctl(SIOCSDEFIFACE_IN6)"); 1290 1291 close(s); 1292 } 1293 1294 static void 1295 getdefif() 1296 { 1297 struct in6_ndifreq ndifreq; 1298 char ifname[IFNAMSIZ+8]; 1299 1300 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1301 err(1, "socket"); 1302 1303 memset(&ndifreq, 0, sizeof(ndifreq)); 1304 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1305 1306 if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1307 err(1, "ioctl(SIOCGDEFIFACE_IN6)"); 1308 1309 if (ndifreq.ifindex == 0) 1310 printf("No default interface.\n"); 1311 else { 1312 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL) 1313 err(1, "failed to resolve ifname for index %lu", 1314 ndifreq.ifindex); 1315 printf("ND default interface = %s\n", ifname); 1316 } 1317 1318 close(s); 1319 } 1320 #endif /* SIOCSDEFIFACE_IN6 */ 1321 1322 static char * 1323 sec2str(time_t total) 1324 { 1325 static char result[256]; 1326 int days, hours, mins, secs; 1327 int first = 1; 1328 char *p = result; 1329 char *ep = &result[sizeof(result)]; 1330 int n; 1331 1332 days = total / 3600 / 24; 1333 hours = (total / 3600) % 24; 1334 mins = (total / 60) % 60; 1335 secs = total % 60; 1336 1337 if (days) { 1338 first = 0; 1339 n = snprintf(p, ep - p, "%dd", days); 1340 if (n < 0 || n >= ep - p) 1341 return "?"; 1342 p += n; 1343 } 1344 if (!first || hours) { 1345 first = 0; 1346 n = snprintf(p, ep - p, "%dh", hours); 1347 if (n < 0 || n >= ep - p) 1348 return "?"; 1349 p += n; 1350 } 1351 if (!first || mins) { 1352 first = 0; 1353 n = snprintf(p, ep - p, "%dm", mins); 1354 if (n < 0 || n >= ep - p) 1355 return "?"; 1356 p += n; 1357 } 1358 snprintf(p, ep - p, "%ds", secs); 1359 1360 return(result); 1361 } 1362 1363 /* 1364 * Print the timestamp 1365 * from tcpdump/util.c 1366 */ 1367 static void 1368 ts_print(const struct timeval *tvp) 1369 { 1370 int s; 1371 1372 /* Default */ 1373 s = (tvp->tv_sec + thiszone) % 86400; 1374 (void)printf("%02d:%02d:%02d.%06u ", 1375 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); 1376 } 1377 1378 #undef NEXTADDR 1379