1/* $FreeBSD: stable/11/usr.sbin/ndp/ndp.c 314041 2017-02-21 12:45:56Z garga $ */ 2/* $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $ */ 3 4/* 5 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32/* 33 * Copyright (c) 1984, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Sun Microsystems, Inc. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 4. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 64/* 65 * Based on: 66 * "@(#) Copyright (c) 1984, 1993\n\ 67 * The Regents of the University of California. All rights reserved.\n"; 68 * 69 * "@(#)arp.c 8.2 (Berkeley) 1/2/94"; 70 */ 71 72/* 73 * ndp - display, set, delete and flush neighbor cache 74 */ 75 76 77#include <sys/param.h> 78#include <sys/file.h> 79#include <sys/ioctl.h> 80#include <sys/socket.h> 81#include <sys/sysctl.h> 82#include <sys/time.h> 83#include <sys/queue.h> 84 85#include <net/if.h> 86#include <net/if_dl.h> 87#include <net/if_types.h> 88#include <net/route.h> 89 90#include <netinet/in.h> 91#include <netinet/if_ether.h> 92 93#include <netinet/icmp6.h> 94#include <netinet6/in6_var.h> 95#include <netinet6/nd6.h> 96 97#include <arpa/inet.h> 98 99#include <ctype.h> 100#include <netdb.h> 101#include <errno.h> 102#include <nlist.h> 103#include <stdio.h> 104#include <string.h> 105#include <paths.h> 106#include <err.h> 107#include <stdlib.h> 108#include <fcntl.h> 109#include <unistd.h> 110#include "gmt2local.h" 111 112#define NEXTADDR(w, s) \ 113 if (rtm->rtm_addrs & (w)) { \ 114 bcopy((char *)&s, cp, sizeof(s)); \ 115 cp += SA_SIZE(&s); \ 116 } 117 118static pid_t pid; 119static int nflag; 120static int tflag; 121static int32_t thiszone; /* time difference with gmt */ 122static int s = -1; 123static int repeat = 0; 124 125static char host_buf[NI_MAXHOST]; /* getnameinfo() */ 126static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 127 128static int file(char *); 129static void getsocket(void); 130static int set(int, char **); 131static void get(char *); 132static int delete(char *); 133static void dump(struct sockaddr_in6 *, int); 134static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int); 135static char *ether_str(struct sockaddr_dl *); 136static int ndp_ether_aton(char *, u_char *); 137static void usage(void); 138static int rtmsg(int); 139static void ifinfo(char *, int, char **); 140static void rtrlist(void); 141static void plist(void); 142static void pfx_flush(void); 143static void rtr_flush(void); 144static void harmonize_rtr(void); 145#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 146static void getdefif(void); 147static void setdefif(char *); 148#endif 149static char *sec2str(time_t); 150static void ts_print(const struct timeval *); 151 152static char *rtpref_str[] = { 153 "medium", /* 00 */ 154 "high", /* 01 */ 155 "rsv", /* 10 */ 156 "low" /* 11 */ 157}; 158 159int 160main(int argc, char **argv) 161{ 162 int ch, mode = 0; 163 char *arg = NULL; 164 165 pid = getpid(); 166 thiszone = gmt2local(0); 167 while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1) 168 switch (ch) { 169 case 'a': 170 case 'c': 171 case 'p': 172 case 'r': 173 case 'H': 174 case 'P': 175 case 'R': 176 case 's': 177 case 'I': 178 if (mode) { 179 usage(); 180 /*NOTREACHED*/ 181 } 182 mode = ch; 183 arg = NULL; 184 break; 185 case 'f': 186 exit(file(optarg) ? 1 : 0); 187 case 'd': 188 case 'i': 189 if (mode) { 190 usage(); 191 /*NOTREACHED*/ 192 } 193 mode = ch; 194 arg = optarg; 195 break; 196 case 'n': 197 nflag = 1; 198 break; 199 case 't': 200 tflag = 1; 201 break; 202 case 'A': 203 if (mode) { 204 usage(); 205 /*NOTREACHED*/ 206 } 207 mode = 'a'; 208 repeat = atoi(optarg); 209 if (repeat < 0) { 210 usage(); 211 /*NOTREACHED*/ 212 } 213 break; 214 default: 215 usage(); 216 } 217 218 argc -= optind; 219 argv += optind; 220 221 switch (mode) { 222 case 'a': 223 case 'c': 224 if (argc != 0) { 225 usage(); 226 /*NOTREACHED*/ 227 } 228 dump(0, mode == 'c'); 229 break; 230 case 'd': 231 if (argc != 0) { 232 usage(); 233 /*NOTREACHED*/ 234 } 235 delete(arg); 236 break; 237 case 'I': 238#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 239 if (argc > 1) { 240 usage(); 241 /*NOTREACHED*/ 242 } else if (argc == 1) { 243 if (strcmp(*argv, "delete") == 0 || 244 if_nametoindex(*argv)) 245 setdefif(*argv); 246 else 247 errx(1, "invalid interface %s", *argv); 248 } 249 getdefif(); /* always call it to print the result */ 250 break; 251#else 252 errx(1, "not supported yet"); 253 /*NOTREACHED*/ 254#endif 255 case 'p': 256 if (argc != 0) { 257 usage(); 258 /*NOTREACHED*/ 259 } 260 plist(); 261 break; 262 case 'i': 263 ifinfo(arg, argc, argv); 264 break; 265 case 'r': 266 if (argc != 0) { 267 usage(); 268 /*NOTREACHED*/ 269 } 270 rtrlist(); 271 break; 272 case 's': 273 if (argc < 2 || argc > 4) 274 usage(); 275 exit(set(argc, argv) ? 1 : 0); 276 case 'H': 277 if (argc != 0) { 278 usage(); 279 /*NOTREACHED*/ 280 } 281 harmonize_rtr(); 282 break; 283 case 'P': 284 if (argc != 0) { 285 usage(); 286 /*NOTREACHED*/ 287 } 288 pfx_flush(); 289 break; 290 case 'R': 291 if (argc != 0) { 292 usage(); 293 /*NOTREACHED*/ 294 } 295 rtr_flush(); 296 break; 297 case 0: 298 if (argc != 1) { 299 usage(); 300 /*NOTREACHED*/ 301 } 302 get(argv[0]); 303 break; 304 } 305 exit(0); 306} 307 308/* 309 * Process a file to set standard ndp entries 310 */ 311static int 312file(char *name) 313{ 314 FILE *fp; 315 int i, retval; 316 char line[100], arg[5][50], *args[5], *p; 317 318 if ((fp = fopen(name, "r")) == NULL) 319 err(1, "cannot open %s", name); 320 args[0] = &arg[0][0]; 321 args[1] = &arg[1][0]; 322 args[2] = &arg[2][0]; 323 args[3] = &arg[3][0]; 324 args[4] = &arg[4][0]; 325 retval = 0; 326 while (fgets(line, sizeof(line), fp) != NULL) { 327 if ((p = strchr(line, '#')) != NULL) 328 *p = '\0'; 329 for (p = line; isblank(*p); p++); 330 if (*p == '\n' || *p == '\0') 331 continue; 332 i = sscanf(line, "%49s %49s %49s %49s %49s", 333 arg[0], arg[1], arg[2], arg[3], arg[4]); 334 if (i < 2) { 335 warnx("bad line: %s", line); 336 retval = 1; 337 continue; 338 } 339 if (set(i, args)) 340 retval = 1; 341 } 342 fclose(fp); 343 return (retval); 344} 345 346static void 347getsocket() 348{ 349 if (s < 0) { 350 s = socket(PF_ROUTE, SOCK_RAW, 0); 351 if (s < 0) { 352 err(1, "socket"); 353 /* NOTREACHED */ 354 } 355 } 356} 357 358static struct sockaddr_in6 so_mask = { 359 .sin6_len = sizeof(so_mask), 360 .sin6_family = AF_INET6 361}; 362static struct sockaddr_in6 blank_sin = { 363 .sin6_len = sizeof(blank_sin), 364 .sin6_family = AF_INET6 365}; 366static struct sockaddr_in6 sin_m; 367static struct sockaddr_dl blank_sdl = { 368 .sdl_len = sizeof(blank_sdl), 369 .sdl_family = AF_LINK 370}; 371static struct sockaddr_dl sdl_m; 372static time_t expire_time; 373static int flags, found_entry; 374static struct { 375 struct rt_msghdr m_rtm; 376 char m_space[512]; 377} m_rtmsg; 378 379/* 380 * Set an individual neighbor cache entry 381 */ 382static int 383set(int argc, char **argv) 384{ 385 register struct sockaddr_in6 *sin = &sin_m; 386 register struct sockaddr_dl *sdl; 387 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 388 struct addrinfo hints, *res; 389 int gai_error; 390 u_char *ea; 391 char *host = argv[0], *eaddr = argv[1]; 392 393 getsocket(); 394 argc -= 2; 395 argv += 2; 396 sdl_m = blank_sdl; 397 sin_m = blank_sin; 398 399 bzero(&hints, sizeof(hints)); 400 hints.ai_family = AF_INET6; 401 gai_error = getaddrinfo(host, NULL, &hints, &res); 402 if (gai_error) { 403 fprintf(stderr, "ndp: %s: %s\n", host, 404 gai_strerror(gai_error)); 405 return 1; 406 } 407 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 408 sin->sin6_scope_id = 409 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 410 ea = (u_char *)LLADDR(&sdl_m); 411 if (ndp_ether_aton(eaddr, ea) == 0) 412 sdl_m.sdl_alen = 6; 413 flags = expire_time = 0; 414 while (argc-- > 0) { 415 if (strncmp(argv[0], "temp", 4) == 0) { 416 struct timeval now; 417 418 gettimeofday(&now, 0); 419 expire_time = now.tv_sec + 20 * 60; 420 } else if (strncmp(argv[0], "proxy", 5) == 0) 421 flags |= RTF_ANNOUNCE; 422 argv++; 423 } 424 if (rtmsg(RTM_GET) < 0) { 425 errx(1, "RTM_GET(%s) failed", host); 426 /* NOTREACHED */ 427 } 428 sin = (struct sockaddr_in6 *)(rtm + 1); 429 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin); 430 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 431 if (sdl->sdl_family == AF_LINK && 432 !(rtm->rtm_flags & RTF_GATEWAY)) { 433 switch (sdl->sdl_type) { 434 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 435 case IFT_ISO88024: case IFT_ISO88025: 436 case IFT_L2VLAN: case IFT_BRIDGE: 437 goto overwrite; 438 } 439 } 440 fprintf(stderr, "set: cannot configure a new entry\n"); 441 return 1; 442 } 443 444overwrite: 445 if (sdl->sdl_family != AF_LINK) { 446 printf("cannot intuit interface index and type for %s\n", host); 447 return (1); 448 } 449 sdl_m.sdl_type = sdl->sdl_type; 450 sdl_m.sdl_index = sdl->sdl_index; 451 return (rtmsg(RTM_ADD)); 452} 453 454/* 455 * Display an individual neighbor cache entry 456 */ 457static void 458get(char *host) 459{ 460 struct sockaddr_in6 *sin = &sin_m; 461 struct addrinfo hints, *res; 462 int gai_error; 463 464 sin_m = blank_sin; 465 bzero(&hints, sizeof(hints)); 466 hints.ai_family = AF_INET6; 467 gai_error = getaddrinfo(host, NULL, &hints, &res); 468 if (gai_error) { 469 fprintf(stderr, "ndp: %s: %s\n", host, 470 gai_strerror(gai_error)); 471 return; 472 } 473 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 474 sin->sin6_scope_id = 475 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 476 dump(sin, 0); 477 if (found_entry == 0) { 478 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 479 sizeof(host_buf), NULL ,0, 480 (nflag ? NI_NUMERICHOST : 0)); 481 printf("%s (%s) -- no entry\n", host, host_buf); 482 exit(1); 483 } 484} 485 486/* 487 * Delete a neighbor cache entry 488 */ 489static int 490delete(char *host) 491{ 492 struct sockaddr_in6 *sin = &sin_m; 493 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 494 register char *cp = m_rtmsg.m_space; 495 struct sockaddr_dl *sdl; 496 struct addrinfo hints, *res; 497 int gai_error; 498 499 getsocket(); 500 sin_m = blank_sin; 501 502 bzero(&hints, sizeof(hints)); 503 hints.ai_family = AF_INET6; 504 gai_error = getaddrinfo(host, NULL, &hints, &res); 505 if (gai_error) { 506 fprintf(stderr, "ndp: %s: %s\n", host, 507 gai_strerror(gai_error)); 508 return 1; 509 } 510 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 511 sin->sin6_scope_id = 512 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 513 if (rtmsg(RTM_GET) < 0) { 514 errx(1, "RTM_GET(%s) failed", host); 515 /* NOTREACHED */ 516 } 517 sin = (struct sockaddr_in6 *)(rtm + 1); 518 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin); 519 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 520 if (sdl->sdl_family == AF_LINK && 521 !(rtm->rtm_flags & RTF_GATEWAY)) { 522 goto delete; 523 } 524 fprintf(stderr, "delete: cannot delete non-NDP entry\n"); 525 return 1; 526 } 527 528delete: 529 if (sdl->sdl_family != AF_LINK) { 530 printf("cannot locate %s\n", host); 531 return (1); 532 } 533 /* 534 * need to reinit the field because it has rt_key 535 * but we want the actual address 536 */ 537 NEXTADDR(RTA_DST, sin_m); 538 rtm->rtm_flags |= RTF_LLDATA; 539 if (rtmsg(RTM_DELETE) == 0) { 540 getnameinfo((struct sockaddr *)sin, 541 sin->sin6_len, host_buf, 542 sizeof(host_buf), NULL, 0, 543 (nflag ? NI_NUMERICHOST : 0)); 544 printf("%s (%s) deleted\n", host, host_buf); 545 } 546 547 return 0; 548} 549 550#define W_ADDR 36 551#define W_LL 17 552#define W_IF 6 553 554/* 555 * Dump the entire neighbor cache 556 */ 557static void 558dump(struct sockaddr_in6 *addr, int cflag) 559{ 560 int mib[6]; 561 size_t needed; 562 char *lim, *buf, *next; 563 struct rt_msghdr *rtm; 564 struct sockaddr_in6 *sin; 565 struct sockaddr_dl *sdl; 566 extern int h_errno; 567 struct timeval now; 568 u_long expire; 569 int addrwidth; 570 int llwidth; 571 int ifwidth; 572 char flgbuf[8]; 573 char *ifname; 574 575 /* Print header */ 576 if (!tflag && !cflag) 577 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n", 578 W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", 579 W_IF, W_IF, "Netif", "Expire", "S", "Flags"); 580 581again:; 582 mib[0] = CTL_NET; 583 mib[1] = PF_ROUTE; 584 mib[2] = 0; 585 mib[3] = AF_INET6; 586 mib[4] = NET_RT_FLAGS; 587#ifdef RTF_LLINFO 588 mib[5] = RTF_LLINFO; 589#else 590 mib[5] = 0; 591#endif 592 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 593 err(1, "sysctl(PF_ROUTE estimate)"); 594 if (needed > 0) { 595 if ((buf = malloc(needed)) == NULL) 596 err(1, "malloc"); 597 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 598 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); 599 lim = buf + needed; 600 } else 601 buf = lim = NULL; 602 603 for (next = buf; next && next < lim; next += rtm->rtm_msglen) { 604 int isrouter = 0, prbs = 0; 605 606 rtm = (struct rt_msghdr *)next; 607 sin = (struct sockaddr_in6 *)(rtm + 1); 608 sdl = (struct sockaddr_dl *)((char *)sin + 609 ALIGN(sin->sin6_len)); 610 611 /* 612 * Some OSes can produce a route that has the LINK flag but 613 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD 614 * and BSD/OS, where xx is not the interface identifier on 615 * lo0). Such routes entry would annoy getnbrinfo() below, 616 * so we skip them. 617 * XXX: such routes should have the GATEWAY flag, not the 618 * LINK flag. However, there is rotten routing software 619 * that advertises all routes that have the GATEWAY flag. 620 * Thus, KAME kernel intentionally does not set the LINK flag. 621 * What is to be fixed is not ndp, but such routing software 622 * (and the kernel workaround)... 623 */ 624 if (sdl->sdl_family != AF_LINK) 625 continue; 626 627 if (!(rtm->rtm_flags & RTF_HOST)) 628 continue; 629 630 if (addr) { 631 if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr, 632 &sin->sin6_addr) == 0 || 633 addr->sin6_scope_id != sin->sin6_scope_id) 634 continue; 635 found_entry = 1; 636 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 637 continue; 638 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || 639 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { 640 /* XXX: should scope id be filled in the kernel? */ 641 if (sin->sin6_scope_id == 0) 642 sin->sin6_scope_id = sdl->sdl_index; 643 } 644 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 645 sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); 646 if (cflag) { 647#ifdef RTF_WASCLONED 648 if (rtm->rtm_flags & RTF_WASCLONED) 649 delete(host_buf); 650#elif defined(RTF_CLONED) 651 if (rtm->rtm_flags & RTF_CLONED) 652 delete(host_buf); 653#else 654 if (rtm->rtm_flags & RTF_PINNED) 655 continue; 656 delete(host_buf); 657#endif 658 continue; 659 } 660 gettimeofday(&now, 0); 661 if (tflag) 662 ts_print(&now); 663 664 addrwidth = strlen(host_buf); 665 if (addrwidth < W_ADDR) 666 addrwidth = W_ADDR; 667 llwidth = strlen(ether_str(sdl)); 668 if (W_ADDR + W_LL - addrwidth > llwidth) 669 llwidth = W_ADDR + W_LL - addrwidth; 670 ifname = if_indextoname(sdl->sdl_index, ifix_buf); 671 if (!ifname) 672 ifname = "?"; 673 ifwidth = strlen(ifname); 674 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) 675 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; 676 677 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, 678 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname); 679 680 /* Print neighbor discovery specific information */ 681 expire = rtm->rtm_rmx.rmx_expire; 682 if (expire > now.tv_sec) 683 printf(" %-9.9s", sec2str(expire - now.tv_sec)); 684 else if (expire == 0) 685 printf(" %-9.9s", "permanent"); 686 else 687 printf(" %-9.9s", "expired"); 688 689 switch (rtm->rtm_rmx.rmx_state) { 690 case ND6_LLINFO_NOSTATE: 691 printf(" N"); 692 break; 693#ifdef ND6_LLINFO_WAITDELETE 694 case ND6_LLINFO_WAITDELETE: 695 printf(" W"); 696 break; 697#endif 698 case ND6_LLINFO_INCOMPLETE: 699 printf(" I"); 700 break; 701 case ND6_LLINFO_REACHABLE: 702 printf(" R"); 703 break; 704 case ND6_LLINFO_STALE: 705 printf(" S"); 706 break; 707 case ND6_LLINFO_DELAY: 708 printf(" D"); 709 break; 710 case ND6_LLINFO_PROBE: 711 printf(" P"); 712 break; 713 default: 714 printf(" ?"); 715 break; 716 } 717 718 isrouter = rtm->rtm_flags & RTF_GATEWAY; 719 prbs = rtm->rtm_rmx.rmx_pksent; 720 721 /* 722 * other flags. R: router, P: proxy, W: ?? 723 */ 724 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 725 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 726 isrouter ? "R" : "", 727 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 728 } else { 729#if 0 /* W and P are mystery even for us */ 730 sin = (struct sockaddr_in6 *) 731 (sdl->sdl_len + (char *)sdl); 732 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 733 isrouter ? "R" : "", 734 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "", 735 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "", 736 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 737#else 738 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 739 isrouter ? "R" : "", 740 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 741#endif 742 } 743 printf(" %s", flgbuf); 744 745 if (prbs) 746 printf(" %d", prbs); 747 748 printf("\n"); 749 } 750 if (buf != NULL) 751 free(buf); 752 753 if (repeat) { 754 printf("\n"); 755 fflush(stdout); 756 sleep(repeat); 757 goto again; 758 } 759} 760 761static struct in6_nbrinfo * 762getnbrinfo(struct in6_addr *addr, int ifindex, int warning) 763{ 764 static struct in6_nbrinfo nbi; 765 int s; 766 767 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 768 err(1, "socket"); 769 770 bzero(&nbi, sizeof(nbi)); 771 if_indextoname(ifindex, nbi.ifname); 772 nbi.addr = *addr; 773 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 774 if (warning) 775 warn("ioctl(SIOCGNBRINFO_IN6)"); 776 close(s); 777 return(NULL); 778 } 779 780 close(s); 781 return(&nbi); 782} 783 784static char * 785ether_str(struct sockaddr_dl *sdl) 786{ 787 static char hbuf[NI_MAXHOST]; 788 789 if (sdl->sdl_alen == ETHER_ADDR_LEN) { 790 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)), 791 sizeof(hbuf)); 792 } else if (sdl->sdl_alen) { 793 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 794 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n); 795 } else 796 snprintf(hbuf, sizeof(hbuf), "(incomplete)"); 797 798 return(hbuf); 799} 800 801static int 802ndp_ether_aton(char *a, u_char *n) 803{ 804 int i, o[6]; 805 806 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 807 &o[3], &o[4], &o[5]); 808 if (i != 6) { 809 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 810 return (1); 811 } 812 for (i = 0; i < 6; i++) 813 n[i] = o[i]; 814 return (0); 815} 816 817static void 818usage() 819{ 820 printf("usage: ndp [-nt] hostname\n"); 821 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n"); 822 printf(" ndp [-nt] -A wait\n"); 823 printf(" ndp [-nt] -d hostname\n"); 824 printf(" ndp [-nt] -f filename\n"); 825 printf(" ndp [-nt] -i interface [flags...]\n"); 826#ifdef SIOCSDEFIFACE_IN6 827 printf(" ndp [-nt] -I [interface|delete]\n"); 828#endif 829 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n"); 830 exit(1); 831} 832 833static int 834rtmsg(int cmd) 835{ 836 static int seq; 837 int rlen; 838 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 839 register char *cp = m_rtmsg.m_space; 840 register int l; 841 842 errno = 0; 843 if (cmd == RTM_DELETE) 844 goto doit; 845 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 846 rtm->rtm_flags = flags; 847 rtm->rtm_version = RTM_VERSION; 848 849 switch (cmd) { 850 default: 851 fprintf(stderr, "ndp: internal wrong cmd\n"); 852 exit(1); 853 case RTM_ADD: 854 rtm->rtm_addrs |= RTA_GATEWAY; 855 if (expire_time) { 856 rtm->rtm_rmx.rmx_expire = expire_time; 857 rtm->rtm_inits = RTV_EXPIRE; 858 } 859 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); 860#if 0 /* we don't support ipv6addr/128 type proxying */ 861 if (rtm->rtm_flags & RTF_ANNOUNCE) { 862 rtm->rtm_flags &= ~RTF_HOST; 863 rtm->rtm_addrs |= RTA_NETMASK; 864 } 865#endif 866 /* FALLTHROUGH */ 867 case RTM_GET: 868 rtm->rtm_addrs |= RTA_DST; 869 } 870 871 NEXTADDR(RTA_DST, sin_m); 872 NEXTADDR(RTA_GATEWAY, sdl_m); 873#if 0 /* we don't support ipv6addr/128 type proxying */ 874 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 875 NEXTADDR(RTA_NETMASK, so_mask); 876#endif 877 878 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 879doit: 880 l = rtm->rtm_msglen; 881 rtm->rtm_seq = ++seq; 882 rtm->rtm_type = cmd; 883 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 884 if (errno != ESRCH || cmd != RTM_DELETE) { 885 err(1, "writing to routing socket"); 886 /* NOTREACHED */ 887 } 888 } 889 do { 890 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 891 } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 892 if (l < 0) 893 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 894 strerror(errno)); 895 return (0); 896} 897 898static void 899ifinfo(char *ifname, int argc, char **argv) 900{ 901 struct in6_ndireq nd; 902 int i, s; 903 u_int32_t newflags; 904#ifdef IPV6CTL_USETEMPADDR 905 u_int8_t nullbuf[8]; 906#endif 907 908 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 909 err(1, "socket"); 910 /* NOTREACHED */ 911 } 912 bzero(&nd, sizeof(nd)); 913 strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); 914 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 915 err(1, "ioctl(SIOCGIFINFO_IN6)"); 916 /* NOTREACHED */ 917 } 918#define ND nd.ndi 919 newflags = ND.flags; 920 for (i = 0; i < argc; i++) { 921 int clear = 0; 922 char *cp = argv[i]; 923 924 if (*cp == '-') { 925 clear = 1; 926 cp++; 927 } 928 929#define SETFLAG(s, f) do { \ 930 if (strcmp(cp, (s)) == 0) { \ 931 if (clear) \ 932 newflags &= ~(f); \ 933 else \ 934 newflags |= (f); \ 935 } \ 936} while (0) 937/* 938 * XXX: this macro is not 100% correct, in that it matches "nud" against 939 * "nudbogus". But we just let it go since this is minor. 940 */ 941#define SETVALUE(f, v) do { \ 942 char *valptr; \ 943 unsigned long newval; \ 944 v = 0; /* unspecified */ \ 945 if (strncmp(cp, f, strlen(f)) == 0) { \ 946 valptr = strchr(cp, '='); \ 947 if (valptr == NULL) \ 948 err(1, "syntax error in %s field", (f)); \ 949 errno = 0; \ 950 newval = strtoul(++valptr, NULL, 0); \ 951 if (errno) \ 952 err(1, "syntax error in %s's value", (f)); \ 953 v = newval; \ 954 } \ 955} while (0) 956 957 SETFLAG("disabled", ND6_IFF_IFDISABLED); 958 SETFLAG("nud", ND6_IFF_PERFORMNUD); 959#ifdef ND6_IFF_ACCEPT_RTADV 960 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV); 961#endif 962#ifdef ND6_IFF_AUTO_LINKLOCAL 963 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL); 964#endif 965#ifdef ND6_IFF_NO_PREFER_IFACE 966 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE); 967#endif 968 SETVALUE("basereachable", ND.basereachable); 969 SETVALUE("retrans", ND.retrans); 970 SETVALUE("curhlim", ND.chlim); 971 972 ND.flags = newflags; 973 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) { 974 err(1, "ioctl(SIOCSIFINFO_IN6)"); 975 /* NOTREACHED */ 976 } 977#undef SETFLAG 978#undef SETVALUE 979 } 980 981 if (!ND.initialized) { 982 errx(1, "%s: not initialized yet", ifname); 983 /* NOTREACHED */ 984 } 985 986 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 987 err(1, "ioctl(SIOCGIFINFO_IN6)"); 988 /* NOTREACHED */ 989 } 990 printf("linkmtu=%d", ND.linkmtu); 991 printf(", maxmtu=%d", ND.maxmtu); 992 printf(", curhlim=%d", ND.chlim); 993 printf(", basereachable=%ds%dms", 994 ND.basereachable / 1000, ND.basereachable % 1000); 995 printf(", reachable=%ds", ND.reachable); 996 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); 997#ifdef IPV6CTL_USETEMPADDR 998 memset(nullbuf, 0, sizeof(nullbuf)); 999 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) { 1000 int j; 1001 u_int8_t *rbuf; 1002 1003 for (i = 0; i < 3; i++) { 1004 switch (i) { 1005 case 0: 1006 printf("\nRandom seed(0): "); 1007 rbuf = ND.randomseed0; 1008 break; 1009 case 1: 1010 printf("\nRandom seed(1): "); 1011 rbuf = ND.randomseed1; 1012 break; 1013 case 2: 1014 printf("\nRandom ID: "); 1015 rbuf = ND.randomid; 1016 break; 1017 default: 1018 errx(1, "impossible case for tempaddr display"); 1019 } 1020 for (j = 0; j < 8; j++) 1021 printf("%02x", rbuf[j]); 1022 } 1023 } 1024#endif /* IPV6CTL_USETEMPADDR */ 1025 if (ND.flags) { 1026 printf("\nFlags: "); 1027#ifdef ND6_IFF_IFDISABLED 1028 if ((ND.flags & ND6_IFF_IFDISABLED)) 1029 printf("disabled "); 1030#endif 1031 if ((ND.flags & ND6_IFF_PERFORMNUD)) 1032 printf("nud "); 1033#ifdef ND6_IFF_ACCEPT_RTADV 1034 if ((ND.flags & ND6_IFF_ACCEPT_RTADV)) 1035 printf("accept_rtadv "); 1036#endif 1037#ifdef ND6_IFF_AUTO_LINKLOCAL 1038 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL)) 1039 printf("auto_linklocal "); 1040#endif 1041#ifdef ND6_IFF_NO_PREFER_IFACE 1042 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE)) 1043 printf("no_prefer_iface "); 1044#endif 1045 } 1046 putc('\n', stdout); 1047#undef ND 1048 1049 close(s); 1050} 1051 1052#ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */ 1053#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ 1054#endif 1055 1056static void 1057rtrlist() 1058{ 1059 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST }; 1060 char *buf; 1061 struct in6_defrouter *p, *ep; 1062 size_t l; 1063 struct timeval now; 1064 1065 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1066 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1067 /*NOTREACHED*/ 1068 } 1069 if (l == 0) 1070 return; 1071 buf = malloc(l); 1072 if (!buf) { 1073 err(1, "malloc"); 1074 /*NOTREACHED*/ 1075 } 1076 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1077 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1078 /*NOTREACHED*/ 1079 } 1080 1081 ep = (struct in6_defrouter *)(buf + l); 1082 for (p = (struct in6_defrouter *)buf; p < ep; p++) { 1083 int rtpref; 1084 1085 if (getnameinfo((struct sockaddr *)&p->rtaddr, 1086 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0, 1087 (nflag ? NI_NUMERICHOST : 0)) != 0) 1088 strlcpy(host_buf, "?", sizeof(host_buf)); 1089 1090 printf("%s if=%s", host_buf, 1091 if_indextoname(p->if_index, ifix_buf)); 1092 printf(", flags=%s%s", 1093 p->flags & ND_RA_FLAG_MANAGED ? "M" : "", 1094 p->flags & ND_RA_FLAG_OTHER ? "O" : ""); 1095 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff; 1096 printf(", pref=%s", rtpref_str[rtpref]); 1097 1098 gettimeofday(&now, 0); 1099 if (p->expire == 0) 1100 printf(", expire=Never\n"); 1101 else 1102 printf(", expire=%s\n", 1103 sec2str(p->expire - now.tv_sec)); 1104 } 1105 free(buf); 1106} 1107 1108static void 1109plist() 1110{ 1111 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST }; 1112 char *buf; 1113 struct in6_prefix *p, *ep, *n; 1114 struct sockaddr_in6 *advrtr; 1115 size_t l; 1116 struct timeval now; 1117 const int niflags = NI_NUMERICHOST; 1118 int ninflags = nflag ? NI_NUMERICHOST : 0; 1119 char namebuf[NI_MAXHOST]; 1120 1121 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1122 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1123 /*NOTREACHED*/ 1124 } 1125 buf = malloc(l); 1126 if (!buf) { 1127 err(1, "malloc"); 1128 /*NOTREACHED*/ 1129 } 1130 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1131 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1132 /*NOTREACHED*/ 1133 } 1134 1135 ep = (struct in6_prefix *)(buf + l); 1136 for (p = (struct in6_prefix *)buf; p < ep; p = n) { 1137 advrtr = (struct sockaddr_in6 *)(p + 1); 1138 n = (struct in6_prefix *)&advrtr[p->advrtrs]; 1139 1140 if (getnameinfo((struct sockaddr *)&p->prefix, 1141 p->prefix.sin6_len, namebuf, sizeof(namebuf), 1142 NULL, 0, niflags) != 0) 1143 strlcpy(namebuf, "?", sizeof(namebuf)); 1144 printf("%s/%d if=%s\n", namebuf, p->prefixlen, 1145 if_indextoname(p->if_index, ifix_buf)); 1146 1147 gettimeofday(&now, 0); 1148 /* 1149 * meaning of fields, especially flags, is very different 1150 * by origin. notify the difference to the users. 1151 */ 1152 printf("flags=%s%s%s%s%s", 1153 p->raflags.onlink ? "L" : "", 1154 p->raflags.autonomous ? "A" : "", 1155 (p->flags & NDPRF_ONLINK) != 0 ? "O" : "", 1156 (p->flags & NDPRF_DETACHED) != 0 ? "D" : "", 1157#ifdef NDPRF_HOME 1158 (p->flags & NDPRF_HOME) != 0 ? "H" : "" 1159#else 1160 "" 1161#endif 1162 ); 1163 if (p->vltime == ND6_INFINITE_LIFETIME) 1164 printf(" vltime=infinity"); 1165 else 1166 printf(" vltime=%lu", (unsigned long)p->vltime); 1167 if (p->pltime == ND6_INFINITE_LIFETIME) 1168 printf(", pltime=infinity"); 1169 else 1170 printf(", pltime=%lu", (unsigned long)p->pltime); 1171 if (p->expire == 0) 1172 printf(", expire=Never"); 1173 else if (p->expire >= now.tv_sec) 1174 printf(", expire=%s", 1175 sec2str(p->expire - now.tv_sec)); 1176 else 1177 printf(", expired"); 1178 printf(", ref=%d", p->refcnt); 1179 printf("\n"); 1180 /* 1181 * "advertising router" list is meaningful only if the prefix 1182 * information is from RA. 1183 */ 1184 if (p->advrtrs) { 1185 int j; 1186 struct sockaddr_in6 *sin6; 1187 1188 sin6 = advrtr; 1189 printf(" advertised by\n"); 1190 for (j = 0; j < p->advrtrs; j++) { 1191 struct in6_nbrinfo *nbi; 1192 1193 if (getnameinfo((struct sockaddr *)sin6, 1194 sin6->sin6_len, namebuf, sizeof(namebuf), 1195 NULL, 0, ninflags) != 0) 1196 strlcpy(namebuf, "?", sizeof(namebuf)); 1197 printf(" %s", namebuf); 1198 1199 nbi = getnbrinfo(&sin6->sin6_addr, 1200 p->if_index, 0); 1201 if (nbi) { 1202 switch (nbi->state) { 1203 case ND6_LLINFO_REACHABLE: 1204 case ND6_LLINFO_STALE: 1205 case ND6_LLINFO_DELAY: 1206 case ND6_LLINFO_PROBE: 1207 printf(" (reachable)\n"); 1208 break; 1209 default: 1210 printf(" (unreachable)\n"); 1211 } 1212 } else 1213 printf(" (no neighbor state)\n"); 1214 sin6++; 1215 } 1216 } else 1217 printf(" No advertising router\n"); 1218 } 1219 free(buf); 1220} 1221 1222static void 1223pfx_flush() 1224{ 1225 char dummyif[IFNAMSIZ+8]; 1226 int s; 1227 1228 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1229 err(1, "socket"); 1230 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1231 if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 1232 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 1233} 1234 1235static void 1236rtr_flush() 1237{ 1238 char dummyif[IFNAMSIZ+8]; 1239 int s; 1240 1241 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1242 err(1, "socket"); 1243 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1244 if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 1245 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 1246 1247 close(s); 1248} 1249 1250static void 1251harmonize_rtr() 1252{ 1253 char dummyif[IFNAMSIZ+8]; 1254 int s; 1255 1256 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1257 err(1, "socket"); 1258 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1259 if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) 1260 err(1, "ioctl(SIOCSNDFLUSH_IN6)"); 1261 1262 close(s); 1263} 1264 1265#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1266static void 1267setdefif(char *ifname) 1268{ 1269 struct in6_ndifreq ndifreq; 1270 unsigned int ifindex; 1271 1272 if (strcasecmp(ifname, "delete") == 0) 1273 ifindex = 0; 1274 else { 1275 if ((ifindex = if_nametoindex(ifname)) == 0) 1276 err(1, "failed to resolve i/f index for %s", ifname); 1277 } 1278 1279 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1280 err(1, "socket"); 1281 1282 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1283 ndifreq.ifindex = ifindex; 1284 1285 if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1286 err(1, "ioctl(SIOCSDEFIFACE_IN6)"); 1287 1288 close(s); 1289} 1290 1291static void 1292getdefif() 1293{ 1294 struct in6_ndifreq ndifreq; 1295 char ifname[IFNAMSIZ+8]; 1296 1297 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1298 err(1, "socket"); 1299 1300 memset(&ndifreq, 0, sizeof(ndifreq)); 1301 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1302 1303 if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1304 err(1, "ioctl(SIOCGDEFIFACE_IN6)"); 1305 1306 if (ndifreq.ifindex == 0) 1307 printf("No default interface.\n"); 1308 else { 1309 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL) 1310 err(1, "failed to resolve ifname for index %lu", 1311 ndifreq.ifindex); 1312 printf("ND default interface = %s\n", ifname); 1313 } 1314 1315 close(s); 1316} 1317#endif /* SIOCSDEFIFACE_IN6 */ 1318 1319static char * 1320sec2str(time_t total) 1321{ 1322 static char result[256]; 1323 int days, hours, mins, secs; 1324 int first = 1; 1325 char *p = result; 1326 char *ep = &result[sizeof(result)]; 1327 int n; 1328 1329 days = total / 3600 / 24; 1330 hours = (total / 3600) % 24; 1331 mins = (total / 60) % 60; 1332 secs = total % 60; 1333 1334 if (days) { 1335 first = 0; 1336 n = snprintf(p, ep - p, "%dd", days); 1337 if (n < 0 || n >= ep - p) 1338 return "?"; 1339 p += n; 1340 } 1341 if (!first || hours) { 1342 first = 0; 1343 n = snprintf(p, ep - p, "%dh", hours); 1344 if (n < 0 || n >= ep - p) 1345 return "?"; 1346 p += n; 1347 } 1348 if (!first || mins) { 1349 first = 0; 1350 n = snprintf(p, ep - p, "%dm", mins); 1351 if (n < 0 || n >= ep - p) 1352 return "?"; 1353 p += n; 1354 } 1355 snprintf(p, ep - p, "%ds", secs); 1356 1357 return(result); 1358} 1359 1360/* 1361 * Print the timestamp 1362 * from tcpdump/util.c 1363 */ 1364static void 1365ts_print(const struct timeval *tvp) 1366{ 1367 int s; 1368 1369 /* Default */ 1370 s = (tvp->tv_sec + thiszone) % 86400; 1371 (void)printf("%02d:%02d:%02d.%06u ", 1372 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); 1373} 1374 1375#undef NEXTADDR 1376