ndp.c revision 287733
1/* $FreeBSD: stable/10/usr.sbin/ndp/ndp.c 287733 2015-09-13 01:59:50Z hrs $ */ 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_var.h> 87#include <net/if_dl.h> 88#include <net/if_types.h> 89#include <net/route.h> 90 91#include <netinet/in.h> 92#include <netinet/if_ether.h> 93 94#include <netinet/icmp6.h> 95#include <netinet6/in6_var.h> 96#include <netinet6/nd6.h> 97 98#include <arpa/inet.h> 99 100#include <ctype.h> 101#include <netdb.h> 102#include <errno.h> 103#include <nlist.h> 104#include <stdio.h> 105#include <string.h> 106#include <paths.h> 107#include <err.h> 108#include <stdlib.h> 109#include <fcntl.h> 110#include <unistd.h> 111#include "gmt2local.h" 112 113/* packing rule for routing socket */ 114#define ROUNDUP(a) \ 115 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 116#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 117 118#define NEXTADDR(w, s) \ 119 if (rtm->rtm_addrs & (w)) { \ 120 bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);} 121 122 123static pid_t pid; 124static int nflag; 125static int tflag; 126static int32_t thiszone; /* time difference with gmt */ 127static int s = -1; 128static int repeat = 0; 129 130char ntop_buf[INET6_ADDRSTRLEN]; /* inet_ntop() */ 131char host_buf[NI_MAXHOST]; /* getnameinfo() */ 132char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 133 134int main(int, char **); 135static int file(char *); 136void getsocket(void); 137int set(int, char **); 138void get(char *); 139int delete(char *); 140void dump(struct in6_addr *, int); 141static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int); 142static char *ether_str(struct sockaddr_dl *); 143int ndp_ether_aton(char *, u_char *); 144void usage(void); 145int rtmsg(int); 146void ifinfo(char *, int, char **); 147void rtrlist(void); 148void plist(void); 149void pfx_flush(void); 150void rtr_flush(void); 151void harmonize_rtr(void); 152#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 153static void getdefif(void); 154static void setdefif(char *); 155#endif 156static char *sec2str(time_t); 157static void ts_print(const struct timeval *); 158 159static char *rtpref_str[] = { 160 "medium", /* 00 */ 161 "high", /* 01 */ 162 "rsv", /* 10 */ 163 "low" /* 11 */ 164}; 165 166int mode = 0; 167char *arg = NULL; 168 169int 170main(argc, argv) 171 int argc; 172 char **argv; 173{ 174 int ch; 175 176 pid = getpid(); 177 thiszone = gmt2local(0); 178 while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1) 179 switch (ch) { 180 case 'a': 181 case 'c': 182 case 'p': 183 case 'r': 184 case 'H': 185 case 'P': 186 case 'R': 187 case 's': 188 case 'I': 189 if (mode) { 190 usage(); 191 /*NOTREACHED*/ 192 } 193 mode = ch; 194 arg = NULL; 195 break; 196 case 'f': 197 exit(file(optarg) ? 1 : 0); 198 case 'd': 199 case 'i': 200 if (mode) { 201 usage(); 202 /*NOTREACHED*/ 203 } 204 mode = ch; 205 arg = optarg; 206 break; 207 case 'n': 208 nflag = 1; 209 break; 210 case 't': 211 tflag = 1; 212 break; 213 case 'A': 214 if (mode) { 215 usage(); 216 /*NOTREACHED*/ 217 } 218 mode = 'a'; 219 repeat = atoi(optarg); 220 if (repeat < 0) { 221 usage(); 222 /*NOTREACHED*/ 223 } 224 break; 225 default: 226 usage(); 227 } 228 229 argc -= optind; 230 argv += optind; 231 232 switch (mode) { 233 case 'a': 234 case 'c': 235 if (argc != 0) { 236 usage(); 237 /*NOTREACHED*/ 238 } 239 dump(0, mode == 'c'); 240 break; 241 case 'd': 242 if (argc != 0) { 243 usage(); 244 /*NOTREACHED*/ 245 } 246 delete(arg); 247 break; 248 case 'I': 249#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 250 if (argc > 1) { 251 usage(); 252 /*NOTREACHED*/ 253 } else if (argc == 1) { 254 if (strcmp(*argv, "delete") == 0 || 255 if_nametoindex(*argv)) 256 setdefif(*argv); 257 else 258 errx(1, "invalid interface %s", *argv); 259 } 260 getdefif(); /* always call it to print the result */ 261 break; 262#else 263 errx(1, "not supported yet"); 264 /*NOTREACHED*/ 265#endif 266 case 'p': 267 if (argc != 0) { 268 usage(); 269 /*NOTREACHED*/ 270 } 271 plist(); 272 break; 273 case 'i': 274 ifinfo(arg, argc, argv); 275 break; 276 case 'r': 277 if (argc != 0) { 278 usage(); 279 /*NOTREACHED*/ 280 } 281 rtrlist(); 282 break; 283 case 's': 284 if (argc < 2 || argc > 4) 285 usage(); 286 exit(set(argc, argv) ? 1 : 0); 287 case 'H': 288 if (argc != 0) { 289 usage(); 290 /*NOTREACHED*/ 291 } 292 harmonize_rtr(); 293 break; 294 case 'P': 295 if (argc != 0) { 296 usage(); 297 /*NOTREACHED*/ 298 } 299 pfx_flush(); 300 break; 301 case 'R': 302 if (argc != 0) { 303 usage(); 304 /*NOTREACHED*/ 305 } 306 rtr_flush(); 307 break; 308 case 0: 309 if (argc != 1) { 310 usage(); 311 /*NOTREACHED*/ 312 } 313 get(argv[0]); 314 break; 315 } 316 exit(0); 317} 318 319/* 320 * Process a file to set standard ndp entries 321 */ 322static int 323file(name) 324 char *name; 325{ 326 FILE *fp; 327 int i, retval; 328 char line[100], arg[5][50], *args[5], *p; 329 330 if ((fp = fopen(name, "r")) == NULL) 331 err(1, "cannot open %s", name); 332 args[0] = &arg[0][0]; 333 args[1] = &arg[1][0]; 334 args[2] = &arg[2][0]; 335 args[3] = &arg[3][0]; 336 args[4] = &arg[4][0]; 337 retval = 0; 338 while (fgets(line, sizeof(line), fp) != NULL) { 339 if ((p = strchr(line, '#')) != NULL) 340 *p = '\0'; 341 for (p = line; isblank(*p); p++); 342 if (*p == '\n' || *p == '\0') 343 continue; 344 i = sscanf(line, "%49s %49s %49s %49s %49s", 345 arg[0], arg[1], arg[2], arg[3], arg[4]); 346 if (i < 2) { 347 warnx("bad line: %s", line); 348 retval = 1; 349 continue; 350 } 351 if (set(i, args)) 352 retval = 1; 353 } 354 fclose(fp); 355 return (retval); 356} 357 358void 359getsocket() 360{ 361 if (s < 0) { 362 s = socket(PF_ROUTE, SOCK_RAW, 0); 363 if (s < 0) { 364 err(1, "socket"); 365 /* NOTREACHED */ 366 } 367 } 368} 369 370struct sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 }; 371struct sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m; 372struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m; 373time_t expire_time; 374int flags, found_entry; 375struct { 376 struct rt_msghdr m_rtm; 377 char m_space[512]; 378} m_rtmsg; 379 380/* 381 * Set an individual neighbor cache entry 382 */ 383int 384set(argc, argv) 385 int argc; 386 char **argv; 387{ 388 register struct sockaddr_in6 *sin = &sin_m; 389 register struct sockaddr_dl *sdl; 390 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 391 struct addrinfo hints, *res; 392 int gai_error; 393 u_char *ea; 394 char *host = argv[0], *eaddr = argv[1]; 395 396 getsocket(); 397 argc -= 2; 398 argv += 2; 399 sdl_m = blank_sdl; 400 sin_m = blank_sin; 401 402 bzero(&hints, sizeof(hints)); 403 hints.ai_family = AF_INET6; 404 gai_error = getaddrinfo(host, NULL, &hints, &res); 405 if (gai_error) { 406 fprintf(stderr, "ndp: %s: %s\n", host, 407 gai_strerror(gai_error)); 408 return 1; 409 } 410 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 411 sin->sin6_scope_id = 412 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 413 ea = (u_char *)LLADDR(&sdl_m); 414 if (ndp_ether_aton(eaddr, ea) == 0) 415 sdl_m.sdl_alen = 6; 416 flags = expire_time = 0; 417 while (argc-- > 0) { 418 if (strncmp(argv[0], "temp", 4) == 0) { 419 struct timeval now; 420 421 gettimeofday(&now, 0); 422 expire_time = now.tv_sec + 20 * 60; 423 } else if (strncmp(argv[0], "proxy", 5) == 0) 424 flags |= RTF_ANNOUNCE; 425 argv++; 426 } 427 if (rtmsg(RTM_GET) < 0) { 428 errx(1, "RTM_GET(%s) failed", host); 429 /* NOTREACHED */ 430 } 431 sin = (struct sockaddr_in6 *)(rtm + 1); 432 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 433 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 434 if (sdl->sdl_family == AF_LINK && 435 !(rtm->rtm_flags & RTF_GATEWAY)) { 436 switch (sdl->sdl_type) { 437 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 438 case IFT_ISO88024: case IFT_ISO88025: 439 case IFT_L2VLAN: case IFT_BRIDGE: 440 goto overwrite; 441 } 442 } 443 fprintf(stderr, "set: cannot configure a new entry\n"); 444 return 1; 445 } 446 447overwrite: 448 if (sdl->sdl_family != AF_LINK) { 449 printf("cannot intuit interface index and type for %s\n", host); 450 return (1); 451 } 452 sdl_m.sdl_type = sdl->sdl_type; 453 sdl_m.sdl_index = sdl->sdl_index; 454 return (rtmsg(RTM_ADD)); 455} 456 457/* 458 * Display an individual neighbor cache entry 459 */ 460void 461get(host) 462 char *host; 463{ 464 struct sockaddr_in6 *sin = &sin_m; 465 struct addrinfo hints, *res; 466 int gai_error; 467 468 sin_m = blank_sin; 469 bzero(&hints, sizeof(hints)); 470 hints.ai_family = AF_INET6; 471 gai_error = getaddrinfo(host, NULL, &hints, &res); 472 if (gai_error) { 473 fprintf(stderr, "ndp: %s: %s\n", host, 474 gai_strerror(gai_error)); 475 return; 476 } 477 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 478 dump(&sin->sin6_addr, 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 */ 491int 492delete(host) 493 char *host; 494{ 495 struct sockaddr_in6 *sin = &sin_m; 496 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 497 register char *cp = m_rtmsg.m_space; 498 struct sockaddr_dl *sdl; 499 struct addrinfo hints, *res; 500 int gai_error; 501 502 getsocket(); 503 sin_m = blank_sin; 504 505 bzero(&hints, sizeof(hints)); 506 hints.ai_family = AF_INET6; 507 gai_error = getaddrinfo(host, NULL, &hints, &res); 508 if (gai_error) { 509 fprintf(stderr, "ndp: %s: %s\n", host, 510 gai_strerror(gai_error)); 511 return 1; 512 } 513 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 514 sin->sin6_scope_id = 515 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 516 if (rtmsg(RTM_GET) < 0) { 517 errx(1, "RTM_GET(%s) failed", host); 518 /* NOTREACHED */ 519 } 520 sin = (struct sockaddr_in6 *)(rtm + 1); 521 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 522 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 523 if (sdl->sdl_family == AF_LINK && 524 !(rtm->rtm_flags & RTF_GATEWAY)) { 525 goto delete; 526 } 527 fprintf(stderr, "delete: cannot delete non-NDP entry\n"); 528 return 1; 529 } 530 531delete: 532 if (sdl->sdl_family != AF_LINK) { 533 printf("cannot locate %s\n", host); 534 return (1); 535 } 536 /* 537 * need to reinit the field because it has rt_key 538 * but we want the actual address 539 */ 540 NEXTADDR(RTA_DST, sin_m); 541 rtm->rtm_flags |= RTF_LLDATA; 542 if (rtmsg(RTM_DELETE) == 0) { 543 getnameinfo((struct sockaddr *)sin, 544 sin->sin6_len, host_buf, 545 sizeof(host_buf), NULL, 0, 546 (nflag ? NI_NUMERICHOST : 0)); 547 printf("%s (%s) deleted\n", host, host_buf); 548 } 549 550 return 0; 551} 552 553#define W_ADDR 36 554#define W_LL 17 555#define W_IF 6 556 557/* 558 * Dump the entire neighbor cache 559 */ 560void 561dump(addr, cflag) 562 struct in6_addr *addr; 563 int cflag; 564{ 565 int mib[6]; 566 size_t needed; 567 char *lim, *buf, *next; 568 struct rt_msghdr *rtm; 569 struct sockaddr_in6 *sin; 570 struct sockaddr_dl *sdl; 571 extern int h_errno; 572 struct in6_nbrinfo *nbi; 573 struct timeval now; 574 int addrwidth; 575 int llwidth; 576 int ifwidth; 577 char flgbuf[8]; 578 char *ifname; 579 580 /* Print header */ 581 if (!tflag && !cflag) 582 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n", 583 W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", 584 W_IF, W_IF, "Netif", "Expire", "S", "Flags"); 585 586again:; 587 mib[0] = CTL_NET; 588 mib[1] = PF_ROUTE; 589 mib[2] = 0; 590 mib[3] = AF_INET6; 591 mib[4] = NET_RT_FLAGS; 592#ifdef RTF_LLINFO 593 mib[5] = RTF_LLINFO; 594#else 595 mib[5] = 0; 596#endif 597 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 598 err(1, "sysctl(PF_ROUTE estimate)"); 599 if (needed > 0) { 600 if ((buf = malloc(needed)) == NULL) 601 err(1, "malloc"); 602 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 603 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); 604 lim = buf + needed; 605 } else 606 buf = lim = NULL; 607 608 for (next = buf; next && next < lim; next += rtm->rtm_msglen) { 609 int isrouter = 0, prbs = 0; 610 611 rtm = (struct rt_msghdr *)next; 612 sin = (struct sockaddr_in6 *)(rtm + 1); 613 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len)); 614 615 /* 616 * Some OSes can produce a route that has the LINK flag but 617 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD 618 * and BSD/OS, where xx is not the interface identifier on 619 * lo0). Such routes entry would annoy getnbrinfo() below, 620 * so we skip them. 621 * XXX: such routes should have the GATEWAY flag, not the 622 * LINK flag. However, there is rotten routing software 623 * that advertises all routes that have the GATEWAY flag. 624 * Thus, KAME kernel intentionally does not set the LINK flag. 625 * What is to be fixed is not ndp, but such routing software 626 * (and the kernel workaround)... 627 */ 628 if (sdl->sdl_family != AF_LINK) 629 continue; 630 631 if (!(rtm->rtm_flags & RTF_HOST)) 632 continue; 633 634 if (addr) { 635 if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr)) 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 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 informations */ 681 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1); 682 if (nbi) { 683 if (nbi->expire > now.tv_sec) { 684 printf(" %-9.9s", 685 sec2str(nbi->expire - now.tv_sec)); 686 } else if (nbi->expire == 0) 687 printf(" %-9.9s", "permanent"); 688 else 689 printf(" %-9.9s", "expired"); 690 691 switch (nbi->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 = nbi->isrouter; 721 prbs = nbi->asked; 722 } else { 723 warnx("failed to get neighbor information"); 724 printf(" "); 725 } 726 727 /* 728 * other flags. R: router, P: proxy, W: ?? 729 */ 730 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 731 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 732 isrouter ? "R" : "", 733 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 734 } else { 735 sin = (struct sockaddr_in6 *) 736 (sdl->sdl_len + (char *)sdl); 737#if 0 /* W and P are mystery even for us */ 738 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 739 isrouter ? "R" : "", 740 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "", 741 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "", 742 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 743#else 744 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 745 isrouter ? "R" : "", 746 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 747#endif 748 } 749 printf(" %s", flgbuf); 750 751 if (prbs) 752 printf(" %d", prbs); 753 754 printf("\n"); 755 } 756 if (buf != NULL) 757 free(buf); 758 759 if (repeat) { 760 printf("\n"); 761 fflush(stdout); 762 sleep(repeat); 763 goto again; 764 } 765} 766 767static struct in6_nbrinfo * 768getnbrinfo(addr, ifindex, warning) 769 struct in6_addr *addr; 770 int ifindex; 771 int warning; 772{ 773 static struct in6_nbrinfo nbi; 774 int s; 775 776 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 777 err(1, "socket"); 778 779 bzero(&nbi, sizeof(nbi)); 780 if_indextoname(ifindex, nbi.ifname); 781 nbi.addr = *addr; 782 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 783 if (warning) 784 warn("ioctl(SIOCGNBRINFO_IN6)"); 785 close(s); 786 return(NULL); 787 } 788 789 close(s); 790 return(&nbi); 791} 792 793static char * 794ether_str(struct sockaddr_dl *sdl) 795{ 796 static char hbuf[NI_MAXHOST]; 797 char *cp; 798 799 if (sdl->sdl_alen == ETHER_ADDR_LEN) { 800 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)), 801 sizeof(hbuf)); 802 } else if (sdl->sdl_alen) { 803 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 804 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n); 805 } else 806 snprintf(hbuf, sizeof(hbuf), "(incomplete)"); 807 808 return(hbuf); 809} 810 811int 812ndp_ether_aton(a, n) 813 char *a; 814 u_char *n; 815{ 816 int i, o[6]; 817 818 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 819 &o[3], &o[4], &o[5]); 820 if (i != 6) { 821 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 822 return (1); 823 } 824 for (i = 0; i < 6; i++) 825 n[i] = o[i]; 826 return (0); 827} 828 829void 830usage() 831{ 832 printf("usage: ndp [-nt] hostname\n"); 833 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n"); 834 printf(" ndp [-nt] -A wait\n"); 835 printf(" ndp [-nt] -d hostname\n"); 836 printf(" ndp [-nt] -f filename\n"); 837 printf(" ndp [-nt] -i interface [flags...]\n"); 838#ifdef SIOCSDEFIFACE_IN6 839 printf(" ndp [-nt] -I [interface|delete]\n"); 840#endif 841 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n"); 842 exit(1); 843} 844 845int 846rtmsg(cmd) 847 int cmd; 848{ 849 static int seq; 850 int rlen; 851 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 852 register char *cp = m_rtmsg.m_space; 853 register int l; 854 855 errno = 0; 856 if (cmd == RTM_DELETE) 857 goto doit; 858 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 859 rtm->rtm_flags = flags; 860 rtm->rtm_version = RTM_VERSION; 861 862 switch (cmd) { 863 default: 864 fprintf(stderr, "ndp: internal wrong cmd\n"); 865 exit(1); 866 case RTM_ADD: 867 rtm->rtm_addrs |= RTA_GATEWAY; 868 if (expire_time) { 869 rtm->rtm_rmx.rmx_expire = expire_time; 870 rtm->rtm_inits = RTV_EXPIRE; 871 } 872 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); 873#if 0 /* we don't support ipv6addr/128 type proxying */ 874 if (rtm->rtm_flags & RTF_ANNOUNCE) { 875 rtm->rtm_flags &= ~RTF_HOST; 876 rtm->rtm_addrs |= RTA_NETMASK; 877 } 878#endif 879 /* FALLTHROUGH */ 880 case RTM_GET: 881 rtm->rtm_addrs |= RTA_DST; 882 } 883 884 NEXTADDR(RTA_DST, sin_m); 885 NEXTADDR(RTA_GATEWAY, sdl_m); 886#if 0 /* we don't support ipv6addr/128 type proxying */ 887 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 888 NEXTADDR(RTA_NETMASK, so_mask); 889#endif 890 891 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 892doit: 893 l = rtm->rtm_msglen; 894 rtm->rtm_seq = ++seq; 895 rtm->rtm_type = cmd; 896 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 897 if (errno != ESRCH || cmd != RTM_DELETE) { 898 err(1, "writing to routing socket"); 899 /* NOTREACHED */ 900 } 901 } 902 do { 903 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 904 } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 905 if (l < 0) 906 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 907 strerror(errno)); 908 return (0); 909} 910 911void 912ifinfo(ifname, argc, argv) 913 char *ifname; 914 int argc; 915 char **argv; 916{ 917 struct in6_ndireq nd; 918 int i, s; 919 u_int32_t newflags; 920#ifdef IPV6CTL_USETEMPADDR 921 u_int8_t nullbuf[8]; 922#endif 923 924 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 925 err(1, "socket"); 926 /* NOTREACHED */ 927 } 928 bzero(&nd, sizeof(nd)); 929 strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); 930 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 931 err(1, "ioctl(SIOCGIFINFO_IN6)"); 932 /* NOTREACHED */ 933 } 934#define ND nd.ndi 935 newflags = ND.flags; 936 for (i = 0; i < argc; i++) { 937 int clear = 0; 938 char *cp = argv[i]; 939 940 if (*cp == '-') { 941 clear = 1; 942 cp++; 943 } 944 945#define SETFLAG(s, f) \ 946 do {\ 947 if (strcmp(cp, (s)) == 0) {\ 948 if (clear)\ 949 newflags &= ~(f);\ 950 else\ 951 newflags |= (f);\ 952 }\ 953 } while (0) 954/* 955 * XXX: this macro is not 100% correct, in that it matches "nud" against 956 * "nudbogus". But we just let it go since this is minor. 957 */ 958#define SETVALUE(f, v) \ 959 do { \ 960 char *valptr; \ 961 unsigned long newval; \ 962 v = 0; /* unspecified */ \ 963 if (strncmp(cp, f, strlen(f)) == 0) { \ 964 valptr = strchr(cp, '='); \ 965 if (valptr == NULL) \ 966 err(1, "syntax error in %s field", (f)); \ 967 errno = 0; \ 968 newval = strtoul(++valptr, NULL, 0); \ 969 if (errno) \ 970 err(1, "syntax error in %s's value", (f)); \ 971 v = newval; \ 972 } \ 973 } while (0) 974 975 SETFLAG("disabled", ND6_IFF_IFDISABLED); 976 SETFLAG("nud", ND6_IFF_PERFORMNUD); 977#ifdef ND6_IFF_ACCEPT_RTADV 978 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV); 979#endif 980#ifdef ND6_IFF_AUTO_LINKLOCAL 981 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL); 982#endif 983#ifdef ND6_IFF_NO_PREFER_IFACE 984 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE); 985#endif 986 SETVALUE("basereachable", ND.basereachable); 987 SETVALUE("retrans", ND.retrans); 988 SETVALUE("curhlim", ND.chlim); 989 990 ND.flags = newflags; 991 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) { 992 err(1, "ioctl(SIOCSIFINFO_IN6)"); 993 /* NOTREACHED */ 994 } 995#undef SETFLAG 996#undef SETVALUE 997 } 998 999 if (!ND.initialized) { 1000 errx(1, "%s: not initialized yet", ifname); 1001 /* NOTREACHED */ 1002 } 1003 1004 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 1005 err(1, "ioctl(SIOCGIFINFO_IN6)"); 1006 /* NOTREACHED */ 1007 } 1008 printf("linkmtu=%d", ND.linkmtu); 1009 printf(", maxmtu=%d", ND.maxmtu); 1010 printf(", curhlim=%d", ND.chlim); 1011 printf(", basereachable=%ds%dms", 1012 ND.basereachable / 1000, ND.basereachable % 1000); 1013 printf(", reachable=%ds", ND.reachable); 1014 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); 1015#ifdef IPV6CTL_USETEMPADDR 1016 memset(nullbuf, 0, sizeof(nullbuf)); 1017 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) { 1018 int j; 1019 u_int8_t *rbuf; 1020 1021 for (i = 0; i < 3; i++) { 1022 switch (i) { 1023 case 0: 1024 printf("\nRandom seed(0): "); 1025 rbuf = ND.randomseed0; 1026 break; 1027 case 1: 1028 printf("\nRandom seed(1): "); 1029 rbuf = ND.randomseed1; 1030 break; 1031 case 2: 1032 printf("\nRandom ID: "); 1033 rbuf = ND.randomid; 1034 break; 1035 default: 1036 errx(1, "impossible case for tempaddr display"); 1037 } 1038 for (j = 0; j < 8; j++) 1039 printf("%02x", rbuf[j]); 1040 } 1041 } 1042#endif 1043 if (ND.flags) { 1044 printf("\nFlags: "); 1045#ifdef ND6_IFF_IFDISABLED 1046 if ((ND.flags & ND6_IFF_IFDISABLED)) 1047 printf("disabled "); 1048#endif 1049 if ((ND.flags & ND6_IFF_PERFORMNUD)) 1050 printf("nud "); 1051#ifdef ND6_IFF_ACCEPT_RTADV 1052 if ((ND.flags & ND6_IFF_ACCEPT_RTADV)) 1053 printf("accept_rtadv "); 1054#endif 1055#ifdef ND6_IFF_AUTO_LINKLOCAL 1056 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL)) 1057 printf("auto_linklocal "); 1058#endif 1059#ifdef ND6_IFF_NO_PREFER_IFACE 1060 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE)) 1061 printf("no_prefer_iface "); 1062#endif 1063 } 1064 putc('\n', stdout); 1065#undef ND 1066 1067 close(s); 1068} 1069 1070#ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */ 1071#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ 1072#endif 1073 1074void 1075rtrlist() 1076{ 1077 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST }; 1078 char *buf; 1079 struct in6_defrouter *p, *ep; 1080 size_t l; 1081 struct timeval now; 1082 1083 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1084 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1085 /*NOTREACHED*/ 1086 } 1087 if (l == 0) 1088 return; 1089 buf = malloc(l); 1090 if (!buf) { 1091 err(1, "malloc"); 1092 /*NOTREACHED*/ 1093 } 1094 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1095 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1096 /*NOTREACHED*/ 1097 } 1098 1099 ep = (struct in6_defrouter *)(buf + l); 1100 for (p = (struct in6_defrouter *)buf; p < ep; p++) { 1101 int rtpref; 1102 1103 if (getnameinfo((struct sockaddr *)&p->rtaddr, 1104 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0, 1105 (nflag ? NI_NUMERICHOST : 0)) != 0) 1106 strlcpy(host_buf, "?", sizeof(host_buf)); 1107 1108 printf("%s if=%s", host_buf, 1109 if_indextoname(p->if_index, ifix_buf)); 1110 printf(", flags=%s%s", 1111 p->flags & ND_RA_FLAG_MANAGED ? "M" : "", 1112 p->flags & ND_RA_FLAG_OTHER ? "O" : ""); 1113 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff; 1114 printf(", pref=%s", rtpref_str[rtpref]); 1115 1116 gettimeofday(&now, 0); 1117 if (p->expire == 0) 1118 printf(", expire=Never\n"); 1119 else 1120 printf(", expire=%s\n", 1121 sec2str(p->expire - now.tv_sec)); 1122 } 1123 free(buf); 1124} 1125 1126void 1127plist() 1128{ 1129 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST }; 1130 char *buf; 1131 struct in6_prefix *p, *ep, *n; 1132 struct sockaddr_in6 *advrtr; 1133 size_t l; 1134 struct timeval now; 1135 const int niflags = NI_NUMERICHOST; 1136 int ninflags = nflag ? NI_NUMERICHOST : 0; 1137 char namebuf[NI_MAXHOST]; 1138 1139 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1140 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1141 /*NOTREACHED*/ 1142 } 1143 buf = malloc(l); 1144 if (!buf) { 1145 err(1, "malloc"); 1146 /*NOTREACHED*/ 1147 } 1148 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1149 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1150 /*NOTREACHED*/ 1151 } 1152 1153 ep = (struct in6_prefix *)(buf + l); 1154 for (p = (struct in6_prefix *)buf; p < ep; p = n) { 1155 advrtr = (struct sockaddr_in6 *)(p + 1); 1156 n = (struct in6_prefix *)&advrtr[p->advrtrs]; 1157 1158 if (getnameinfo((struct sockaddr *)&p->prefix, 1159 p->prefix.sin6_len, namebuf, sizeof(namebuf), 1160 NULL, 0, niflags) != 0) 1161 strlcpy(namebuf, "?", sizeof(namebuf)); 1162 printf("%s/%d if=%s\n", namebuf, p->prefixlen, 1163 if_indextoname(p->if_index, ifix_buf)); 1164 1165 gettimeofday(&now, 0); 1166 /* 1167 * meaning of fields, especially flags, is very different 1168 * by origin. notify the difference to the users. 1169 */ 1170 printf("flags=%s%s%s%s%s", 1171 p->raflags.onlink ? "L" : "", 1172 p->raflags.autonomous ? "A" : "", 1173 (p->flags & NDPRF_ONLINK) != 0 ? "O" : "", 1174 (p->flags & NDPRF_DETACHED) != 0 ? "D" : "", 1175#ifdef NDPRF_HOME 1176 (p->flags & NDPRF_HOME) != 0 ? "H" : "" 1177#else 1178 "" 1179#endif 1180 ); 1181 if (p->vltime == ND6_INFINITE_LIFETIME) 1182 printf(" vltime=infinity"); 1183 else 1184 printf(" vltime=%lu", (unsigned long)p->vltime); 1185 if (p->pltime == ND6_INFINITE_LIFETIME) 1186 printf(", pltime=infinity"); 1187 else 1188 printf(", pltime=%lu", (unsigned long)p->pltime); 1189 if (p->expire == 0) 1190 printf(", expire=Never"); 1191 else if (p->expire >= now.tv_sec) 1192 printf(", expire=%s", 1193 sec2str(p->expire - now.tv_sec)); 1194 else 1195 printf(", expired"); 1196 printf(", ref=%d", p->refcnt); 1197 printf("\n"); 1198 /* 1199 * "advertising router" list is meaningful only if the prefix 1200 * information is from RA. 1201 */ 1202 if (p->advrtrs) { 1203 int j; 1204 struct sockaddr_in6 *sin6; 1205 1206 sin6 = advrtr; 1207 printf(" advertised by\n"); 1208 for (j = 0; j < p->advrtrs; j++) { 1209 struct in6_nbrinfo *nbi; 1210 1211 if (getnameinfo((struct sockaddr *)sin6, 1212 sin6->sin6_len, namebuf, sizeof(namebuf), 1213 NULL, 0, ninflags) != 0) 1214 strlcpy(namebuf, "?", sizeof(namebuf)); 1215 printf(" %s", namebuf); 1216 1217 nbi = getnbrinfo(&sin6->sin6_addr, 1218 p->if_index, 0); 1219 if (nbi) { 1220 switch (nbi->state) { 1221 case ND6_LLINFO_REACHABLE: 1222 case ND6_LLINFO_STALE: 1223 case ND6_LLINFO_DELAY: 1224 case ND6_LLINFO_PROBE: 1225 printf(" (reachable)\n"); 1226 break; 1227 default: 1228 printf(" (unreachable)\n"); 1229 } 1230 } else 1231 printf(" (no neighbor state)\n"); 1232 sin6++; 1233 } 1234 } else 1235 printf(" No advertising router\n"); 1236 } 1237 free(buf); 1238} 1239 1240void 1241pfx_flush() 1242{ 1243 char dummyif[IFNAMSIZ+8]; 1244 int s; 1245 1246 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1247 err(1, "socket"); 1248 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1249 if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 1250 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 1251} 1252 1253void 1254rtr_flush() 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, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 1263 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 1264 1265 close(s); 1266} 1267 1268void 1269harmonize_rtr() 1270{ 1271 char dummyif[IFNAMSIZ+8]; 1272 int s; 1273 1274 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1275 err(1, "socket"); 1276 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1277 if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) 1278 err(1, "ioctl(SIOCSNDFLUSH_IN6)"); 1279 1280 close(s); 1281} 1282 1283#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1284static void 1285setdefif(ifname) 1286 char *ifname; 1287{ 1288 struct in6_ndifreq ndifreq; 1289 unsigned int ifindex; 1290 1291 if (strcasecmp(ifname, "delete") == 0) 1292 ifindex = 0; 1293 else { 1294 if ((ifindex = if_nametoindex(ifname)) == 0) 1295 err(1, "failed to resolve i/f index for %s", ifname); 1296 } 1297 1298 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1299 err(1, "socket"); 1300 1301 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1302 ndifreq.ifindex = ifindex; 1303 1304 if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1305 err(1, "ioctl(SIOCSDEFIFACE_IN6)"); 1306 1307 close(s); 1308} 1309 1310static void 1311getdefif() 1312{ 1313 struct in6_ndifreq ndifreq; 1314 char ifname[IFNAMSIZ+8]; 1315 1316 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1317 err(1, "socket"); 1318 1319 memset(&ndifreq, 0, sizeof(ndifreq)); 1320 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1321 1322 if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1323 err(1, "ioctl(SIOCGDEFIFACE_IN6)"); 1324 1325 if (ndifreq.ifindex == 0) 1326 printf("No default interface.\n"); 1327 else { 1328 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL) 1329 err(1, "failed to resolve ifname for index %lu", 1330 ndifreq.ifindex); 1331 printf("ND default interface = %s\n", ifname); 1332 } 1333 1334 close(s); 1335} 1336#endif 1337 1338static char * 1339sec2str(total) 1340 time_t total; 1341{ 1342 static char result[256]; 1343 int days, hours, mins, secs; 1344 int first = 1; 1345 char *p = result; 1346 char *ep = &result[sizeof(result)]; 1347 int n; 1348 1349 days = total / 3600 / 24; 1350 hours = (total / 3600) % 24; 1351 mins = (total / 60) % 60; 1352 secs = total % 60; 1353 1354 if (days) { 1355 first = 0; 1356 n = snprintf(p, ep - p, "%dd", days); 1357 if (n < 0 || n >= ep - p) 1358 return "?"; 1359 p += n; 1360 } 1361 if (!first || hours) { 1362 first = 0; 1363 n = snprintf(p, ep - p, "%dh", hours); 1364 if (n < 0 || n >= ep - p) 1365 return "?"; 1366 p += n; 1367 } 1368 if (!first || mins) { 1369 first = 0; 1370 n = snprintf(p, ep - p, "%dm", mins); 1371 if (n < 0 || n >= ep - p) 1372 return "?"; 1373 p += n; 1374 } 1375 snprintf(p, ep - p, "%ds", secs); 1376 1377 return(result); 1378} 1379 1380/* 1381 * Print the timestamp 1382 * from tcpdump/util.c 1383 */ 1384static void 1385ts_print(tvp) 1386 const struct timeval *tvp; 1387{ 1388 int s; 1389 1390 /* Default */ 1391 s = (tvp->tv_sec + thiszone) % 86400; 1392 (void)printf("%02d:%02d:%02d.%06u ", 1393 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); 1394} 1395 1396#undef NEXTADDR 1397