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 120static pid_t pid; 121static int nflag; 122static int tflag; 123static int32_t thiszone; /* time difference with gmt */ 124static int s = -1; 125static int repeat = 0; 126 127static char host_buf[NI_MAXHOST]; /* getnameinfo() */ 128static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 129 130static int file(char *); 131static void getsocket(void); 132static int set(int, char **); 133static void get(char *); 134static int delete(char *); 135static void dump(struct sockaddr_in6 *, int); 136static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int); 137static char *ether_str(struct sockaddr_dl *); 138static int ndp_ether_aton(char *, u_char *); 139static void usage(void); 140static int rtmsg(int); 141static void ifinfo(char *, int, char **); 142static void rtrlist(void); 143static void plist(void); 144static void pfx_flush(void); 145static void rtr_flush(void); 146static void harmonize_rtr(void); 147#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 148static void getdefif(void); 149static void setdefif(char *); 150#endif 151static char *sec2str(time_t); 152static void ts_print(const struct timeval *); 153 154static const char *rtpref_str[] = { 155 "medium", /* 00 */ 156 "high", /* 01 */ 157 "rsv", /* 10 */ 158 "low" /* 11 */ 159}; 160 161int 162main(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 */ 313static int 314file(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 348static void 349getsocket() 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 360static struct sockaddr_in6 so_mask = { 361 .sin6_len = sizeof(so_mask), 362 .sin6_family = AF_INET6 363}; 364static struct sockaddr_in6 blank_sin = { 365 .sin6_len = sizeof(blank_sin), 366 .sin6_family = AF_INET6 367}; 368static struct sockaddr_in6 sin_m; 369static struct sockaddr_dl blank_sdl = { 370 .sdl_len = sizeof(blank_sdl), 371 .sdl_family = AF_LINK 372}; 373static struct sockaddr_dl sdl_m; 374static time_t expire_time; 375static int flags, found_entry; 376static 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 */ 384static int 385set(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 446overwrite: 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 */ 459static void 460get(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 */ 491static int 492delete(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 530delete: 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 */ 559static void 560dump(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 struct timeval now; 569 time_t expire; 570 int addrwidth; 571 int llwidth; 572 int ifwidth; 573 char flgbuf[8]; 574 char *ifname; 575 576 /* Print header */ 577 if (!tflag && !cflag) 578 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n", 579 W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", 580 W_IF, W_IF, "Netif", "Expire", "S", "Flags"); 581 582again:; 583 mib[0] = CTL_NET; 584 mib[1] = PF_ROUTE; 585 mib[2] = 0; 586 mib[3] = AF_INET6; 587 mib[4] = NET_RT_FLAGS; 588#ifdef RTF_LLINFO 589 mib[5] = RTF_LLINFO; 590#else 591 mib[5] = 0; 592#endif 593 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 594 err(1, "sysctl(PF_ROUTE estimate)"); 595 if (needed > 0) { 596 if ((buf = malloc(needed)) == NULL) 597 err(1, "malloc"); 598 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 599 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); 600 lim = buf + needed; 601 } else 602 buf = lim = NULL; 603 604 for (next = buf; next && next < lim; next += rtm->rtm_msglen) { 605 int isrouter = 0, prbs = 0; 606 607 rtm = (struct rt_msghdr *)next; 608 sin = (struct sockaddr_in6 *)(rtm + 1); 609 sdl = (struct sockaddr_dl *)((char *)sin + 610 ALIGN(sin->sin6_len)); 611 612 /* 613 * Some OSes can produce a route that has the LINK flag but 614 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD 615 * and BSD/OS, where xx is not the interface identifier on 616 * lo0). Such routes entry would annoy getnbrinfo() below, 617 * so we skip them. 618 * XXX: such routes should have the GATEWAY flag, not the 619 * LINK flag. However, there is rotten routing software 620 * that advertises all routes that have the GATEWAY flag. 621 * Thus, KAME kernel intentionally does not set the LINK flag. 622 * What is to be fixed is not ndp, but such routing software 623 * (and the kernel workaround)... 624 */ 625 if (sdl->sdl_family != AF_LINK) 626 continue; 627 628 if (!(rtm->rtm_flags & RTF_HOST)) 629 continue; 630 631 if (addr) { 632 if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr, 633 &sin->sin6_addr) == 0 || 634 addr->sin6_scope_id != sin->sin6_scope_id) 635 continue; 636 found_entry = 1; 637 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 638 continue; 639 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || 640 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { 641 /* XXX: should scope id be filled in the kernel? */ 642 if (sin->sin6_scope_id == 0) 643 sin->sin6_scope_id = sdl->sdl_index; 644 } 645 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 646 sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); 647 if (cflag) { 648#ifdef RTF_WASCLONED 649 if (rtm->rtm_flags & RTF_WASCLONED) 650 delete(host_buf); 651#elif defined(RTF_CLONED) 652 if (rtm->rtm_flags & RTF_CLONED) 653 delete(host_buf); 654#else 655 if (rtm->rtm_flags & RTF_PINNED) 656 continue; 657 delete(host_buf); 658#endif 659 continue; 660 } 661 gettimeofday(&now, 0); 662 if (tflag) 663 ts_print(&now); 664 665 addrwidth = strlen(host_buf); 666 if (addrwidth < W_ADDR) 667 addrwidth = W_ADDR; 668 llwidth = strlen(ether_str(sdl)); 669 if (W_ADDR + W_LL - addrwidth > llwidth) 670 llwidth = W_ADDR + W_LL - addrwidth; 671 ifname = if_indextoname(sdl->sdl_index, ifix_buf); 672 if (ifname == NULL) { 673 strlcpy(ifix_buf, "?", sizeof(ifix_buf)); 674 ifname = ifix_buf; 675 } 676 ifwidth = strlen(ifname); 677 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) 678 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; 679 680 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, 681 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname); 682 683 /* Print neighbor discovery specific information */ 684 expire = rtm->rtm_rmx.rmx_expire; 685 if (expire > now.tv_sec) 686 printf(" %-9.9s", sec2str(expire - now.tv_sec)); 687 else if (expire == 0) 688 printf(" %-9.9s", "permanent"); 689 else 690 printf(" %-9.9s", "expired"); 691 692 switch (rtm->rtm_rmx.rmx_state) { 693 case ND6_LLINFO_NOSTATE: 694 printf(" N"); 695 break; 696#ifdef ND6_LLINFO_WAITDELETE 697 case ND6_LLINFO_WAITDELETE: 698 printf(" W"); 699 break; 700#endif 701 case ND6_LLINFO_INCOMPLETE: 702 printf(" I"); 703 break; 704 case ND6_LLINFO_REACHABLE: 705 printf(" R"); 706 break; 707 case ND6_LLINFO_STALE: 708 printf(" S"); 709 break; 710 case ND6_LLINFO_DELAY: 711 printf(" D"); 712 break; 713 case ND6_LLINFO_PROBE: 714 printf(" P"); 715 break; 716 default: 717 printf(" ?"); 718 break; 719 } 720 721 isrouter = rtm->rtm_flags & RTF_GATEWAY; 722 prbs = rtm->rtm_rmx.rmx_pksent; 723 724 /* 725 * other flags. R: router, P: proxy, W: ?? 726 */ 727 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 728 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 729 isrouter ? "R" : "", 730 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 731 } else { 732#if 0 /* W and P are mystery even for us */ 733 sin = (struct sockaddr_in6 *) 734 (sdl->sdl_len + (char *)sdl); 735 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 736 isrouter ? "R" : "", 737 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "", 738 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "", 739 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 740#else 741 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 742 isrouter ? "R" : "", 743 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 744#endif 745 } 746 printf(" %s", flgbuf); 747 748 if (prbs) 749 printf(" %d", prbs); 750 751 printf("\n"); 752 } 753 if (buf != NULL) 754 free(buf); 755 756 if (repeat) { 757 printf("\n"); 758 fflush(stdout); 759 sleep(repeat); 760 goto again; 761 } 762} 763 764static struct in6_nbrinfo * 765getnbrinfo(struct in6_addr *addr, int ifindex, int warning) 766{ 767 static struct in6_nbrinfo nbi; 768 int sock; 769 770 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 771 err(1, "socket"); 772 773 bzero(&nbi, sizeof(nbi)); 774 if_indextoname(ifindex, nbi.ifname); 775 nbi.addr = *addr; 776 if (ioctl(sock, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 777 if (warning) 778 warn("ioctl(SIOCGNBRINFO_IN6)"); 779 close(sock); 780 return(NULL); 781 } 782 783 close(sock); 784 return(&nbi); 785} 786 787static char * 788ether_str(struct sockaddr_dl *sdl) 789{ 790 static char hbuf[NI_MAXHOST]; 791 792 if (sdl->sdl_alen == ETHER_ADDR_LEN) { 793 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)), 794 sizeof(hbuf)); 795 } else if (sdl->sdl_alen) { 796 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 797 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n); 798 } else 799 snprintf(hbuf, sizeof(hbuf), "(incomplete)"); 800 801 return(hbuf); 802} 803 804static int 805ndp_ether_aton(char *a, u_char *n) 806{ 807 int i, o[6]; 808 809 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 810 &o[3], &o[4], &o[5]); 811 if (i != 6) { 812 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 813 return (1); 814 } 815 for (i = 0; i < 6; i++) 816 n[i] = o[i]; 817 return (0); 818} 819 820static void 821usage() 822{ 823 printf("usage: ndp [-nt] hostname\n"); 824 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n"); 825 printf(" ndp [-nt] -A wait\n"); 826 printf(" ndp [-nt] -d hostname\n"); 827 printf(" ndp [-nt] -f filename\n"); 828 printf(" ndp [-nt] -i interface [flags...]\n"); 829#ifdef SIOCSDEFIFACE_IN6 830 printf(" ndp [-nt] -I [interface|delete]\n"); 831#endif 832 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n"); 833 exit(1); 834} 835 836static int 837rtmsg(int cmd) 838{ 839 static int seq; 840 int rlen; 841 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 842 register char *cp = m_rtmsg.m_space; 843 register int l; 844 845 errno = 0; 846 if (cmd == RTM_DELETE) 847 goto doit; 848 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 849 rtm->rtm_flags = flags; 850 rtm->rtm_version = RTM_VERSION; 851 852 switch (cmd) { 853 default: 854 fprintf(stderr, "ndp: internal wrong cmd\n"); 855 exit(1); 856 case RTM_ADD: 857 rtm->rtm_addrs |= RTA_GATEWAY; 858 if (expire_time) { 859 rtm->rtm_rmx.rmx_expire = expire_time; 860 rtm->rtm_inits = RTV_EXPIRE; 861 } 862 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); 863#if 0 /* we don't support ipv6addr/128 type proxying */ 864 if (rtm->rtm_flags & RTF_ANNOUNCE) { 865 rtm->rtm_flags &= ~RTF_HOST; 866 rtm->rtm_addrs |= RTA_NETMASK; 867 } 868#endif 869 /* FALLTHROUGH */ 870 case RTM_GET: 871 rtm->rtm_addrs |= RTA_DST; 872 } 873 874 NEXTADDR(RTA_DST, sin_m); 875 NEXTADDR(RTA_GATEWAY, sdl_m); 876#if 0 /* we don't support ipv6addr/128 type proxying */ 877 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 878 NEXTADDR(RTA_NETMASK, so_mask); 879#endif 880 881 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 882doit: 883 l = rtm->rtm_msglen; 884 rtm->rtm_seq = ++seq; 885 rtm->rtm_type = cmd; 886 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 887 if (errno != ESRCH || cmd != RTM_DELETE) { 888 err(1, "writing to routing socket"); 889 /* NOTREACHED */ 890 } 891 } 892 do { 893 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 894 } while (l > 0 && (rtm->rtm_type != cmd || rtm->rtm_seq != seq || 895 rtm->rtm_pid != pid)); 896 if (l < 0) 897 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 898 strerror(errno)); 899 return (0); 900} 901 902static void 903ifinfo(char *ifname, int argc, char **argv) 904{ 905 struct in6_ndireq nd; 906 int i, sock; 907 u_int32_t newflags; 908#ifdef IPV6CTL_USETEMPADDR 909 u_int8_t nullbuf[8]; 910#endif 911 912 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 913 err(1, "socket"); 914 /* NOTREACHED */ 915 } 916 bzero(&nd, sizeof(nd)); 917 strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); 918 if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 919 err(1, "ioctl(SIOCGIFINFO_IN6)"); 920 /* NOTREACHED */ 921 } 922#define ND nd.ndi 923 newflags = ND.flags; 924 for (i = 0; i < argc; i++) { 925 int clear = 0; 926 char *cp = argv[i]; 927 928 if (*cp == '-') { 929 clear = 1; 930 cp++; 931 } 932 933#define SETFLAG(s, f) do { \ 934 if (strcmp(cp, (s)) == 0) { \ 935 if (clear) \ 936 newflags &= ~(f); \ 937 else \ 938 newflags |= (f); \ 939 } \ 940} while (0) 941/* 942 * XXX: this macro is not 100% correct, in that it matches "nud" against 943 * "nudbogus". But we just let it go since this is minor. 944 */ 945#define SETVALUE(f, v) do { \ 946 char *valptr; \ 947 unsigned long newval; \ 948 v = 0; /* unspecified */ \ 949 if (strncmp(cp, f, strlen(f)) == 0) { \ 950 valptr = strchr(cp, '='); \ 951 if (valptr == NULL) \ 952 err(1, "syntax error in %s field", (f)); \ 953 errno = 0; \ 954 newval = strtoul(++valptr, NULL, 0); \ 955 if (errno) \ 956 err(1, "syntax error in %s's value", (f)); \ 957 v = newval; \ 958 } \ 959} while (0) 960 961 SETFLAG("disabled", ND6_IFF_IFDISABLED); 962 SETFLAG("nud", ND6_IFF_PERFORMNUD); 963#ifdef ND6_IFF_ACCEPT_RTADV 964 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV); 965#endif 966#ifdef ND6_IFF_AUTO_LINKLOCAL 967 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL); 968#endif 969#ifdef ND6_IFF_NO_PREFER_IFACE 970 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE); 971#endif 972 SETVALUE("basereachable", ND.basereachable); 973 SETVALUE("retrans", ND.retrans); 974 SETVALUE("curhlim", ND.chlim); 975 976 ND.flags = newflags; 977 if (ioctl(sock, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) { 978 err(1, "ioctl(SIOCSIFINFO_IN6)"); 979 /* NOTREACHED */ 980 } 981#undef SETFLAG 982#undef SETVALUE 983 } 984 985 if (!ND.initialized) { 986 errx(1, "%s: not initialized yet", ifname); 987 /* NOTREACHED */ 988 } 989 990 if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 991 err(1, "ioctl(SIOCGIFINFO_IN6)"); 992 /* NOTREACHED */ 993 } 994 printf("linkmtu=%d", ND.linkmtu); 995 printf(", maxmtu=%d", ND.maxmtu); 996 printf(", curhlim=%d", ND.chlim); 997 printf(", basereachable=%ds%dms", 998 ND.basereachable / 1000, ND.basereachable % 1000); 999 printf(", reachable=%ds", ND.reachable); 1000 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); 1001#ifdef IPV6CTL_USETEMPADDR 1002 memset(nullbuf, 0, sizeof(nullbuf)); 1003 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) { 1004 int j; 1005 u_int8_t *rbuf; 1006 1007 for (i = 0; i < 3; i++) { 1008 switch (i) { 1009 case 0: 1010 printf("\nRandom seed(0): "); 1011 rbuf = ND.randomseed0; 1012 break; 1013 case 1: 1014 printf("\nRandom seed(1): "); 1015 rbuf = ND.randomseed1; 1016 break; 1017 case 2: 1018 printf("\nRandom ID: "); 1019 rbuf = ND.randomid; 1020 break; 1021 default: 1022 errx(1, "impossible case for tempaddr display"); 1023 } 1024 for (j = 0; j < 8; j++) 1025 printf("%02x", rbuf[j]); 1026 } 1027 } 1028#endif /* IPV6CTL_USETEMPADDR */ 1029 if (ND.flags) { 1030 printf("\nFlags: "); 1031#ifdef ND6_IFF_IFDISABLED 1032 if ((ND.flags & ND6_IFF_IFDISABLED)) 1033 printf("disabled "); 1034#endif 1035 if ((ND.flags & ND6_IFF_PERFORMNUD)) 1036 printf("nud "); 1037#ifdef ND6_IFF_ACCEPT_RTADV 1038 if ((ND.flags & ND6_IFF_ACCEPT_RTADV)) 1039 printf("accept_rtadv "); 1040#endif 1041#ifdef ND6_IFF_AUTO_LINKLOCAL 1042 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL)) 1043 printf("auto_linklocal "); 1044#endif 1045#ifdef ND6_IFF_NO_PREFER_IFACE 1046 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE)) 1047 printf("no_prefer_iface "); 1048#endif 1049 } 1050 putc('\n', stdout); 1051#undef ND 1052 1053 close(sock); 1054} 1055 1056#ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */ 1057#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ 1058#endif 1059 1060static void 1061rtrlist() 1062{ 1063 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST }; 1064 char *buf; 1065 struct in6_defrouter *p, *ep; 1066 size_t l; 1067 struct timeval now; 1068 1069 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1070 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1071 /*NOTREACHED*/ 1072 } 1073 if (l == 0) 1074 return; 1075 buf = malloc(l); 1076 if (!buf) { 1077 err(1, "malloc"); 1078 /*NOTREACHED*/ 1079 } 1080 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1081 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1082 /*NOTREACHED*/ 1083 } 1084 1085 ep = (struct in6_defrouter *)(buf + l); 1086 for (p = (struct in6_defrouter *)buf; p < ep; p++) { 1087 int rtpref; 1088 1089 if (getnameinfo((struct sockaddr *)&p->rtaddr, 1090 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0, 1091 (nflag ? NI_NUMERICHOST : 0)) != 0) 1092 strlcpy(host_buf, "?", sizeof(host_buf)); 1093 1094 printf("%s if=%s", host_buf, 1095 if_indextoname(p->if_index, ifix_buf)); 1096 printf(", flags=%s%s", 1097 p->flags & ND_RA_FLAG_MANAGED ? "M" : "", 1098 p->flags & ND_RA_FLAG_OTHER ? "O" : ""); 1099 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff; 1100 printf(", pref=%s", rtpref_str[rtpref]); 1101 1102 gettimeofday(&now, 0); 1103 if (p->expire == 0) 1104 printf(", expire=Never\n"); 1105 else 1106 printf(", expire=%s\n", 1107 sec2str(p->expire - now.tv_sec)); 1108 } 1109 free(buf); 1110} 1111 1112static void 1113plist() 1114{ 1115 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST }; 1116 char *buf; 1117 struct in6_prefix *p, *ep, *n; 1118 struct sockaddr_in6 *advrtr; 1119 size_t l; 1120 struct timeval now; 1121 const int niflags = NI_NUMERICHOST; 1122 int ninflags = nflag ? NI_NUMERICHOST : 0; 1123 char namebuf[NI_MAXHOST]; 1124 1125 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1126 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1127 /*NOTREACHED*/ 1128 } 1129 buf = malloc(l); 1130 if (!buf) { 1131 err(1, "malloc"); 1132 /*NOTREACHED*/ 1133 } 1134 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1135 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1136 /*NOTREACHED*/ 1137 } 1138 1139 ep = (struct in6_prefix *)(buf + l); 1140 for (p = (struct in6_prefix *)buf; p < ep; p = n) { 1141 advrtr = (struct sockaddr_in6 *)(p + 1); 1142 n = (struct in6_prefix *)&advrtr[p->advrtrs]; 1143 1144 if (getnameinfo((struct sockaddr *)&p->prefix, 1145 p->prefix.sin6_len, namebuf, sizeof(namebuf), 1146 NULL, 0, niflags) != 0) 1147 strlcpy(namebuf, "?", sizeof(namebuf)); 1148 printf("%s/%d if=%s\n", namebuf, p->prefixlen, 1149 if_indextoname(p->if_index, ifix_buf)); 1150 1151 gettimeofday(&now, 0); 1152 /* 1153 * meaning of fields, especially flags, is very different 1154 * by origin. notify the difference to the users. 1155 */ 1156 printf("flags=%s%s%s%s%s", 1157 p->raflags.onlink ? "L" : "", 1158 p->raflags.autonomous ? "A" : "", 1159 (p->flags & NDPRF_ONLINK) != 0 ? "O" : "", 1160 (p->flags & NDPRF_DETACHED) != 0 ? "D" : "", 1161#ifdef NDPRF_HOME 1162 (p->flags & NDPRF_HOME) != 0 ? "H" : "" 1163#else 1164 "" 1165#endif 1166 ); 1167 if (p->vltime == ND6_INFINITE_LIFETIME) 1168 printf(" vltime=infinity"); 1169 else 1170 printf(" vltime=%lu", (unsigned long)p->vltime); 1171 if (p->pltime == ND6_INFINITE_LIFETIME) 1172 printf(", pltime=infinity"); 1173 else 1174 printf(", pltime=%lu", (unsigned long)p->pltime); 1175 if (p->expire == 0) 1176 printf(", expire=Never"); 1177 else if (p->expire >= now.tv_sec) 1178 printf(", expire=%s", 1179 sec2str(p->expire - now.tv_sec)); 1180 else 1181 printf(", expired"); 1182 printf(", ref=%d", p->refcnt); 1183 printf("\n"); 1184 /* 1185 * "advertising router" list is meaningful only if the prefix 1186 * information is from RA. 1187 */ 1188 if (p->advrtrs) { 1189 int j; 1190 struct sockaddr_in6 *sin6; 1191 1192 sin6 = advrtr; 1193 printf(" advertised by\n"); 1194 for (j = 0; j < p->advrtrs; j++) { 1195 struct in6_nbrinfo *nbi; 1196 1197 if (getnameinfo((struct sockaddr *)sin6, 1198 sin6->sin6_len, namebuf, sizeof(namebuf), 1199 NULL, 0, ninflags) != 0) 1200 strlcpy(namebuf, "?", sizeof(namebuf)); 1201 printf(" %s", namebuf); 1202 1203 nbi = getnbrinfo(&sin6->sin6_addr, 1204 p->if_index, 0); 1205 if (nbi) { 1206 switch (nbi->state) { 1207 case ND6_LLINFO_REACHABLE: 1208 case ND6_LLINFO_STALE: 1209 case ND6_LLINFO_DELAY: 1210 case ND6_LLINFO_PROBE: 1211 printf(" (reachable)\n"); 1212 break; 1213 default: 1214 printf(" (unreachable)\n"); 1215 } 1216 } else 1217 printf(" (no neighbor state)\n"); 1218 sin6++; 1219 } 1220 } else 1221 printf(" No advertising router\n"); 1222 } 1223 free(buf); 1224} 1225 1226static void 1227pfx_flush() 1228{ 1229 char dummyif[IFNAMSIZ+8]; 1230 int sock; 1231 1232 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1233 err(1, "socket"); 1234 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1235 if (ioctl(sock, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 1236 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 1237 1238 close(sock); 1239} 1240 1241static void 1242rtr_flush() 1243{ 1244 char dummyif[IFNAMSIZ+8]; 1245 int sock; 1246 1247 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1248 err(1, "socket"); 1249 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1250 if (ioctl(sock, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 1251 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 1252 1253 close(sock); 1254} 1255 1256static void 1257harmonize_rtr() 1258{ 1259 char dummyif[IFNAMSIZ+8]; 1260 int sock; 1261 1262 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1263 err(1, "socket"); 1264 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1265 if (ioctl(sock, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) 1266 err(1, "ioctl(SIOCSNDFLUSH_IN6)"); 1267 1268 close(sock); 1269} 1270 1271#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1272static void 1273setdefif(char *ifname) 1274{ 1275 struct in6_ndifreq ndifreq; 1276 unsigned int ifindex; 1277 int sock; 1278 1279 if (strcasecmp(ifname, "delete") == 0) 1280 ifindex = 0; 1281 else { 1282 if ((ifindex = if_nametoindex(ifname)) == 0) 1283 err(1, "failed to resolve i/f index for %s", ifname); 1284 } 1285 1286 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1287 err(1, "socket"); 1288 1289 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1290 ndifreq.ifindex = ifindex; 1291 1292 if (ioctl(sock, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1293 err(1, "ioctl(SIOCSDEFIFACE_IN6)"); 1294 1295 close(sock); 1296} 1297 1298static void 1299getdefif() 1300{ 1301 struct in6_ndifreq ndifreq; 1302 char ifname[IFNAMSIZ+8]; 1303 int sock; 1304 1305 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1306 err(1, "socket"); 1307 1308 memset(&ndifreq, 0, sizeof(ndifreq)); 1309 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1310 1311 if (ioctl(sock, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1312 err(1, "ioctl(SIOCGDEFIFACE_IN6)"); 1313 1314 if (ndifreq.ifindex == 0) 1315 printf("No default interface.\n"); 1316 else { 1317 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL) 1318 err(1, "failed to resolve ifname for index %lu", 1319 ndifreq.ifindex); 1320 printf("ND default interface = %s\n", ifname); 1321 } 1322 1323 close(sock); 1324} 1325#endif /* SIOCSDEFIFACE_IN6 */ 1326 1327static char * 1328sec2str(time_t total) 1329{ 1330 static char result[256]; 1331 int days, hours, mins, secs; 1332 int first = 1; 1333 char *p = result; 1334 char *ep = &result[sizeof(result)]; 1335 int n; 1336 1337 days = total / 3600 / 24; 1338 hours = (total / 3600) % 24; 1339 mins = (total / 60) % 60; 1340 secs = total % 60; 1341 1342 if (days) { 1343 first = 0; 1344 n = snprintf(p, ep - p, "%dd", days); 1345 if (n < 0 || n >= ep - p) 1346 return "?"; 1347 p += n; 1348 } 1349 if (!first || hours) { 1350 first = 0; 1351 n = snprintf(p, ep - p, "%dh", hours); 1352 if (n < 0 || n >= ep - p) 1353 return "?"; 1354 p += n; 1355 } 1356 if (!first || mins) { 1357 first = 0; 1358 n = snprintf(p, ep - p, "%dm", mins); 1359 if (n < 0 || n >= ep - p) 1360 return "?"; 1361 p += n; 1362 } 1363 snprintf(p, ep - p, "%ds", secs); 1364 1365 return(result); 1366} 1367 1368/* 1369 * Print the timestamp 1370 * from tcpdump/util.c 1371 */ 1372static void 1373ts_print(const struct timeval *tvp) 1374{ 1375 int sec; 1376 1377 /* Default */ 1378 sec = (tvp->tv_sec + thiszone) % 86400; 1379 (void)printf("%02d:%02d:%02d.%06u ", 1380 sec / 3600, (sec % 3600) / 60, sec % 60, (u_int32_t)tvp->tv_usec); 1381} 1382 1383#undef NEXTADDR 1384