ndp.c revision 292333
1/* $FreeBSD: head/usr.sbin/ndp/ndp.c 292333 2015-12-16 10:14:16Z melifaro $ */ 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)); cp += SA_SIZE(&s);} 115 116 117static pid_t pid; 118static int nflag; 119static int tflag; 120static int32_t thiszone; /* time difference with gmt */ 121static int s = -1; 122static int repeat = 0; 123 124static char host_buf[NI_MAXHOST]; /* getnameinfo() */ 125static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 126 127static int file(char *); 128static void getsocket(void); 129static int set(int, char **); 130static void get(char *); 131static int delete(char *); 132static void dump(struct sockaddr_in6 *, int); 133static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int); 134static char *ether_str(struct sockaddr_dl *); 135static int ndp_ether_aton(char *, u_char *); 136static void usage(void); 137static int rtmsg(int); 138static void ifinfo(char *, int, char **); 139static void rtrlist(void); 140static void plist(void); 141static void pfx_flush(void); 142static void rtr_flush(void); 143static void harmonize_rtr(void); 144#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 145static void getdefif(void); 146static void setdefif(char *); 147#endif 148static char *sec2str(time_t); 149static void ts_print(const struct timeval *); 150 151static char *rtpref_str[] = { 152 "medium", /* 00 */ 153 "high", /* 01 */ 154 "rsv", /* 10 */ 155 "low" /* 11 */ 156}; 157 158int 159main(int argc, char **argv) 160{ 161 int ch, mode = 0; 162 char *arg = NULL; 163 164 pid = getpid(); 165 thiszone = gmt2local(0); 166 while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1) 167 switch (ch) { 168 case 'a': 169 case 'c': 170 case 'p': 171 case 'r': 172 case 'H': 173 case 'P': 174 case 'R': 175 case 's': 176 case 'I': 177 if (mode) { 178 usage(); 179 /*NOTREACHED*/ 180 } 181 mode = ch; 182 arg = NULL; 183 break; 184 case 'f': 185 exit(file(optarg) ? 1 : 0); 186 case 'd': 187 case 'i': 188 if (mode) { 189 usage(); 190 /*NOTREACHED*/ 191 } 192 mode = ch; 193 arg = optarg; 194 break; 195 case 'n': 196 nflag = 1; 197 break; 198 case 't': 199 tflag = 1; 200 break; 201 case 'A': 202 if (mode) { 203 usage(); 204 /*NOTREACHED*/ 205 } 206 mode = 'a'; 207 repeat = atoi(optarg); 208 if (repeat < 0) { 209 usage(); 210 /*NOTREACHED*/ 211 } 212 break; 213 default: 214 usage(); 215 } 216 217 argc -= optind; 218 argv += optind; 219 220 switch (mode) { 221 case 'a': 222 case 'c': 223 if (argc != 0) { 224 usage(); 225 /*NOTREACHED*/ 226 } 227 dump(0, mode == 'c'); 228 break; 229 case 'd': 230 if (argc != 0) { 231 usage(); 232 /*NOTREACHED*/ 233 } 234 delete(arg); 235 break; 236 case 'I': 237#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 238 if (argc > 1) { 239 usage(); 240 /*NOTREACHED*/ 241 } else if (argc == 1) { 242 if (strcmp(*argv, "delete") == 0 || 243 if_nametoindex(*argv)) 244 setdefif(*argv); 245 else 246 errx(1, "invalid interface %s", *argv); 247 } 248 getdefif(); /* always call it to print the result */ 249 break; 250#else 251 errx(1, "not supported yet"); 252 /*NOTREACHED*/ 253#endif 254 case 'p': 255 if (argc != 0) { 256 usage(); 257 /*NOTREACHED*/ 258 } 259 plist(); 260 break; 261 case 'i': 262 ifinfo(arg, argc, argv); 263 break; 264 case 'r': 265 if (argc != 0) { 266 usage(); 267 /*NOTREACHED*/ 268 } 269 rtrlist(); 270 break; 271 case 's': 272 if (argc < 2 || argc > 4) 273 usage(); 274 exit(set(argc, argv) ? 1 : 0); 275 case 'H': 276 if (argc != 0) { 277 usage(); 278 /*NOTREACHED*/ 279 } 280 harmonize_rtr(); 281 break; 282 case 'P': 283 if (argc != 0) { 284 usage(); 285 /*NOTREACHED*/ 286 } 287 pfx_flush(); 288 break; 289 case 'R': 290 if (argc != 0) { 291 usage(); 292 /*NOTREACHED*/ 293 } 294 rtr_flush(); 295 break; 296 case 0: 297 if (argc != 1) { 298 usage(); 299 /*NOTREACHED*/ 300 } 301 get(argv[0]); 302 break; 303 } 304 exit(0); 305} 306 307/* 308 * Process a file to set standard ndp entries 309 */ 310static int 311file(char *name) 312{ 313 FILE *fp; 314 int i, retval; 315 char line[100], arg[5][50], *args[5], *p; 316 317 if ((fp = fopen(name, "r")) == NULL) 318 err(1, "cannot open %s", name); 319 args[0] = &arg[0][0]; 320 args[1] = &arg[1][0]; 321 args[2] = &arg[2][0]; 322 args[3] = &arg[3][0]; 323 args[4] = &arg[4][0]; 324 retval = 0; 325 while (fgets(line, sizeof(line), fp) != NULL) { 326 if ((p = strchr(line, '#')) != NULL) 327 *p = '\0'; 328 for (p = line; isblank(*p); p++); 329 if (*p == '\n' || *p == '\0') 330 continue; 331 i = sscanf(line, "%49s %49s %49s %49s %49s", 332 arg[0], arg[1], arg[2], arg[3], arg[4]); 333 if (i < 2) { 334 warnx("bad line: %s", line); 335 retval = 1; 336 continue; 337 } 338 if (set(i, args)) 339 retval = 1; 340 } 341 fclose(fp); 342 return (retval); 343} 344 345static void 346getsocket() 347{ 348 if (s < 0) { 349 s = socket(PF_ROUTE, SOCK_RAW, 0); 350 if (s < 0) { 351 err(1, "socket"); 352 /* NOTREACHED */ 353 } 354 } 355} 356 357static struct sockaddr_in6 so_mask = { 358 .sin6_len = sizeof(so_mask), 359 .sin6_family = AF_INET6 360}; 361static struct sockaddr_in6 blank_sin = { 362 .sin6_len = sizeof(blank_sin), 363 .sin6_family = AF_INET6 364}; 365static struct sockaddr_in6 sin_m; 366static struct sockaddr_dl blank_sdl = { 367 .sdl_len = sizeof(blank_sdl), 368 .sdl_family = AF_LINK 369}; 370static struct sockaddr_dl sdl_m; 371static time_t expire_time; 372static int flags, found_entry; 373static struct { 374 struct rt_msghdr m_rtm; 375 char m_space[512]; 376} m_rtmsg; 377 378/* 379 * Set an individual neighbor cache entry 380 */ 381static int 382set(int argc, char **argv) 383{ 384 register struct sockaddr_in6 *sin = &sin_m; 385 register struct sockaddr_dl *sdl; 386 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 387 struct addrinfo hints, *res; 388 int gai_error; 389 u_char *ea; 390 char *host = argv[0], *eaddr = argv[1]; 391 392 getsocket(); 393 argc -= 2; 394 argv += 2; 395 sdl_m = blank_sdl; 396 sin_m = blank_sin; 397 398 bzero(&hints, sizeof(hints)); 399 hints.ai_family = AF_INET6; 400 gai_error = getaddrinfo(host, NULL, &hints, &res); 401 if (gai_error) { 402 fprintf(stderr, "ndp: %s: %s\n", host, 403 gai_strerror(gai_error)); 404 return 1; 405 } 406 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 407 sin->sin6_scope_id = 408 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 409 ea = (u_char *)LLADDR(&sdl_m); 410 if (ndp_ether_aton(eaddr, ea) == 0) 411 sdl_m.sdl_alen = 6; 412 flags = expire_time = 0; 413 while (argc-- > 0) { 414 if (strncmp(argv[0], "temp", 4) == 0) { 415 struct timeval now; 416 417 gettimeofday(&now, 0); 418 expire_time = now.tv_sec + 20 * 60; 419 } else if (strncmp(argv[0], "proxy", 5) == 0) 420 flags |= RTF_ANNOUNCE; 421 argv++; 422 } 423 if (rtmsg(RTM_GET) < 0) { 424 errx(1, "RTM_GET(%s) failed", host); 425 /* NOTREACHED */ 426 } 427 sin = (struct sockaddr_in6 *)(rtm + 1); 428 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin); 429 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 430 if (sdl->sdl_family == AF_LINK && 431 !(rtm->rtm_flags & RTF_GATEWAY)) { 432 switch (sdl->sdl_type) { 433 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 434 case IFT_ISO88024: case IFT_ISO88025: 435 case IFT_L2VLAN: case IFT_BRIDGE: 436 goto overwrite; 437 } 438 } 439 fprintf(stderr, "set: cannot configure a new entry\n"); 440 return 1; 441 } 442 443overwrite: 444 if (sdl->sdl_family != AF_LINK) { 445 printf("cannot intuit interface index and type for %s\n", host); 446 return (1); 447 } 448 sdl_m.sdl_type = sdl->sdl_type; 449 sdl_m.sdl_index = sdl->sdl_index; 450 return (rtmsg(RTM_ADD)); 451} 452 453/* 454 * Display an individual neighbor cache entry 455 */ 456static void 457get(char *host) 458{ 459 struct sockaddr_in6 *sin = &sin_m; 460 struct addrinfo hints, *res; 461 int gai_error; 462 463 sin_m = blank_sin; 464 bzero(&hints, sizeof(hints)); 465 hints.ai_family = AF_INET6; 466 gai_error = getaddrinfo(host, NULL, &hints, &res); 467 if (gai_error) { 468 fprintf(stderr, "ndp: %s: %s\n", host, 469 gai_strerror(gai_error)); 470 return; 471 } 472 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 473 sin->sin6_scope_id = 474 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 475 dump(sin, 0); 476 if (found_entry == 0) { 477 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 478 sizeof(host_buf), NULL ,0, 479 (nflag ? NI_NUMERICHOST : 0)); 480 printf("%s (%s) -- no entry\n", host, host_buf); 481 exit(1); 482 } 483} 484 485/* 486 * Delete a neighbor cache entry 487 */ 488static int 489delete(char *host) 490{ 491 struct sockaddr_in6 *sin = &sin_m; 492 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 493 register char *cp = m_rtmsg.m_space; 494 struct sockaddr_dl *sdl; 495 struct addrinfo hints, *res; 496 int gai_error; 497 498 getsocket(); 499 sin_m = blank_sin; 500 501 bzero(&hints, sizeof(hints)); 502 hints.ai_family = AF_INET6; 503 gai_error = getaddrinfo(host, NULL, &hints, &res); 504 if (gai_error) { 505 fprintf(stderr, "ndp: %s: %s\n", host, 506 gai_strerror(gai_error)); 507 return 1; 508 } 509 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 510 sin->sin6_scope_id = 511 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 512 if (rtmsg(RTM_GET) < 0) { 513 errx(1, "RTM_GET(%s) failed", host); 514 /* NOTREACHED */ 515 } 516 sin = (struct sockaddr_in6 *)(rtm + 1); 517 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin); 518 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 519 if (sdl->sdl_family == AF_LINK && 520 !(rtm->rtm_flags & RTF_GATEWAY)) { 521 goto delete; 522 } 523 fprintf(stderr, "delete: cannot delete non-NDP entry\n"); 524 return 1; 525 } 526 527delete: 528 if (sdl->sdl_family != AF_LINK) { 529 printf("cannot locate %s\n", host); 530 return (1); 531 } 532 /* 533 * need to reinit the field because it has rt_key 534 * but we want the actual address 535 */ 536 NEXTADDR(RTA_DST, sin_m); 537 rtm->rtm_flags |= RTF_LLDATA; 538 if (rtmsg(RTM_DELETE) == 0) { 539 getnameinfo((struct sockaddr *)sin, 540 sin->sin6_len, host_buf, 541 sizeof(host_buf), NULL, 0, 542 (nflag ? NI_NUMERICHOST : 0)); 543 printf("%s (%s) deleted\n", host, host_buf); 544 } 545 546 return 0; 547} 548 549#define W_ADDR 36 550#define W_LL 17 551#define W_IF 6 552 553/* 554 * Dump the entire neighbor cache 555 */ 556static void 557dump(struct sockaddr_in6 *addr, int cflag) 558{ 559 int mib[6]; 560 size_t needed; 561 char *lim, *buf, *next; 562 struct rt_msghdr *rtm; 563 struct sockaddr_in6 *sin; 564 struct sockaddr_dl *sdl; 565 extern int h_errno; 566 struct timeval now; 567 u_long expire; 568 int addrwidth; 569 int llwidth; 570 int ifwidth; 571 char flgbuf[8]; 572 char *ifname; 573 574 /* Print header */ 575 if (!tflag && !cflag) 576 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n", 577 W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", 578 W_IF, W_IF, "Netif", "Expire", "S", "Flags"); 579 580again:; 581 mib[0] = CTL_NET; 582 mib[1] = PF_ROUTE; 583 mib[2] = 0; 584 mib[3] = AF_INET6; 585 mib[4] = NET_RT_FLAGS; 586#ifdef RTF_LLINFO 587 mib[5] = RTF_LLINFO; 588#else 589 mib[5] = 0; 590#endif 591 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 592 err(1, "sysctl(PF_ROUTE estimate)"); 593 if (needed > 0) { 594 if ((buf = malloc(needed)) == NULL) 595 err(1, "malloc"); 596 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 597 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); 598 lim = buf + needed; 599 } else 600 buf = lim = NULL; 601 602 for (next = buf; next && next < lim; next += rtm->rtm_msglen) { 603 int isrouter = 0, prbs = 0; 604 605 rtm = (struct rt_msghdr *)next; 606 sin = (struct sockaddr_in6 *)(rtm + 1); 607 sdl = (struct sockaddr_dl *)((char *)sin + ALIGN(sin->sin6_len)); 608 609 /* 610 * Some OSes can produce a route that has the LINK flag but 611 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD 612 * and BSD/OS, where xx is not the interface identifier on 613 * lo0). Such routes entry would annoy getnbrinfo() below, 614 * so we skip them. 615 * XXX: such routes should have the GATEWAY flag, not the 616 * LINK flag. However, there is rotten routing software 617 * that advertises all routes that have the GATEWAY flag. 618 * Thus, KAME kernel intentionally does not set the LINK flag. 619 * What is to be fixed is not ndp, but such routing software 620 * (and the kernel workaround)... 621 */ 622 if (sdl->sdl_family != AF_LINK) 623 continue; 624 625 if (!(rtm->rtm_flags & RTF_HOST)) 626 continue; 627 628 if (addr) { 629 if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr, 630 &sin->sin6_addr) == 0 || 631 addr->sin6_scope_id != sin->sin6_scope_id) 632 continue; 633 found_entry = 1; 634 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 635 continue; 636 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || 637 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { 638 /* XXX: should scope id be filled in the kernel? */ 639 if (sin->sin6_scope_id == 0) 640 sin->sin6_scope_id = sdl->sdl_index; 641 } 642 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 643 sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); 644 if (cflag) { 645#ifdef RTF_WASCLONED 646 if (rtm->rtm_flags & RTF_WASCLONED) 647 delete(host_buf); 648#elif defined(RTF_CLONED) 649 if (rtm->rtm_flags & RTF_CLONED) 650 delete(host_buf); 651#else 652 if (rtm->rtm_flags & RTF_PINNED) 653 continue; 654 delete(host_buf); 655#endif 656 continue; 657 } 658 gettimeofday(&now, 0); 659 if (tflag) 660 ts_print(&now); 661 662 addrwidth = strlen(host_buf); 663 if (addrwidth < W_ADDR) 664 addrwidth = W_ADDR; 665 llwidth = strlen(ether_str(sdl)); 666 if (W_ADDR + W_LL - addrwidth > llwidth) 667 llwidth = W_ADDR + W_LL - addrwidth; 668 ifname = if_indextoname(sdl->sdl_index, ifix_buf); 669 if (!ifname) 670 ifname = "?"; 671 ifwidth = strlen(ifname); 672 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) 673 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; 674 675 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, 676 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname); 677 678 /* Print neighbor discovery specific information */ 679 expire = rtm->rtm_rmx.rmx_expire; 680 if (expire > now.tv_sec) 681 printf(" %-9.9s", sec2str(expire - now.tv_sec)); 682 else if (expire == 0) 683 printf(" %-9.9s", "permanent"); 684 else 685 printf(" %-9.9s", "expired"); 686 687 switch (rtm->rtm_rmx.rmx_state) { 688 case ND6_LLINFO_NOSTATE: 689 printf(" N"); 690 break; 691#ifdef ND6_LLINFO_WAITDELETE 692 case ND6_LLINFO_WAITDELETE: 693 printf(" W"); 694 break; 695#endif 696 case ND6_LLINFO_INCOMPLETE: 697 printf(" I"); 698 break; 699 case ND6_LLINFO_REACHABLE: 700 printf(" R"); 701 break; 702 case ND6_LLINFO_STALE: 703 printf(" S"); 704 break; 705 case ND6_LLINFO_DELAY: 706 printf(" D"); 707 break; 708 case ND6_LLINFO_PROBE: 709 printf(" P"); 710 break; 711 default: 712 printf(" ?"); 713 break; 714 } 715 716 isrouter = rtm->rtm_flags & RTF_GATEWAY; 717 prbs = rtm->rtm_rmx.rmx_pksent; 718 719 /* 720 * other flags. R: router, P: proxy, W: ?? 721 */ 722 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 723 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 724 isrouter ? "R" : "", 725 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 726 } else { 727#if 0 /* W and P are mystery even for us */ 728 sin = (struct sockaddr_in6 *) 729 (sdl->sdl_len + (char *)sdl); 730 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 731 isrouter ? "R" : "", 732 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "", 733 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "", 734 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 735#else 736 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 737 isrouter ? "R" : "", 738 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 739#endif 740 } 741 printf(" %s", flgbuf); 742 743 if (prbs) 744 printf(" %d", prbs); 745 746 printf("\n"); 747 } 748 if (buf != NULL) 749 free(buf); 750 751 if (repeat) { 752 printf("\n"); 753 fflush(stdout); 754 sleep(repeat); 755 goto again; 756 } 757} 758 759static struct in6_nbrinfo * 760getnbrinfo(struct in6_addr *addr, int ifindex, int warning) 761{ 762 static struct in6_nbrinfo nbi; 763 int s; 764 765 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 766 err(1, "socket"); 767 768 bzero(&nbi, sizeof(nbi)); 769 if_indextoname(ifindex, nbi.ifname); 770 nbi.addr = *addr; 771 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 772 if (warning) 773 warn("ioctl(SIOCGNBRINFO_IN6)"); 774 close(s); 775 return(NULL); 776 } 777 778 close(s); 779 return(&nbi); 780} 781 782static char * 783ether_str(struct sockaddr_dl *sdl) 784{ 785 static char hbuf[NI_MAXHOST]; 786 787 if (sdl->sdl_alen == ETHER_ADDR_LEN) { 788 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)), 789 sizeof(hbuf)); 790 } else if (sdl->sdl_alen) { 791 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 792 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n); 793 } else 794 snprintf(hbuf, sizeof(hbuf), "(incomplete)"); 795 796 return(hbuf); 797} 798 799static int 800ndp_ether_aton(char *a, u_char *n) 801{ 802 int i, o[6]; 803 804 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 805 &o[3], &o[4], &o[5]); 806 if (i != 6) { 807 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 808 return (1); 809 } 810 for (i = 0; i < 6; i++) 811 n[i] = o[i]; 812 return (0); 813} 814 815static void 816usage() 817{ 818 printf("usage: ndp [-nt] hostname\n"); 819 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n"); 820 printf(" ndp [-nt] -A wait\n"); 821 printf(" ndp [-nt] -d hostname\n"); 822 printf(" ndp [-nt] -f filename\n"); 823 printf(" ndp [-nt] -i interface [flags...]\n"); 824#ifdef SIOCSDEFIFACE_IN6 825 printf(" ndp [-nt] -I [interface|delete]\n"); 826#endif 827 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n"); 828 exit(1); 829} 830 831static int 832rtmsg(int cmd) 833{ 834 static int seq; 835 int rlen; 836 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 837 register char *cp = m_rtmsg.m_space; 838 register int l; 839 840 errno = 0; 841 if (cmd == RTM_DELETE) 842 goto doit; 843 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 844 rtm->rtm_flags = flags; 845 rtm->rtm_version = RTM_VERSION; 846 847 switch (cmd) { 848 default: 849 fprintf(stderr, "ndp: internal wrong cmd\n"); 850 exit(1); 851 case RTM_ADD: 852 rtm->rtm_addrs |= RTA_GATEWAY; 853 if (expire_time) { 854 rtm->rtm_rmx.rmx_expire = expire_time; 855 rtm->rtm_inits = RTV_EXPIRE; 856 } 857 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); 858#if 0 /* we don't support ipv6addr/128 type proxying */ 859 if (rtm->rtm_flags & RTF_ANNOUNCE) { 860 rtm->rtm_flags &= ~RTF_HOST; 861 rtm->rtm_addrs |= RTA_NETMASK; 862 } 863#endif 864 /* FALLTHROUGH */ 865 case RTM_GET: 866 rtm->rtm_addrs |= RTA_DST; 867 } 868 869 NEXTADDR(RTA_DST, sin_m); 870 NEXTADDR(RTA_GATEWAY, sdl_m); 871#if 0 /* we don't support ipv6addr/128 type proxying */ 872 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 873 NEXTADDR(RTA_NETMASK, so_mask); 874#endif 875 876 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 877doit: 878 l = rtm->rtm_msglen; 879 rtm->rtm_seq = ++seq; 880 rtm->rtm_type = cmd; 881 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 882 if (errno != ESRCH || cmd != RTM_DELETE) { 883 err(1, "writing to routing socket"); 884 /* NOTREACHED */ 885 } 886 } 887 do { 888 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 889 } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 890 if (l < 0) 891 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 892 strerror(errno)); 893 return (0); 894} 895 896static void 897ifinfo(char *ifname, int argc, char **argv) 898{ 899 struct in6_ndireq nd; 900 int i, s; 901 u_int32_t newflags; 902#ifdef IPV6CTL_USETEMPADDR 903 u_int8_t nullbuf[8]; 904#endif 905 906 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 907 err(1, "socket"); 908 /* NOTREACHED */ 909 } 910 bzero(&nd, sizeof(nd)); 911 strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); 912 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 913 err(1, "ioctl(SIOCGIFINFO_IN6)"); 914 /* NOTREACHED */ 915 } 916#define ND nd.ndi 917 newflags = ND.flags; 918 for (i = 0; i < argc; i++) { 919 int clear = 0; 920 char *cp = argv[i]; 921 922 if (*cp == '-') { 923 clear = 1; 924 cp++; 925 } 926 927#define SETFLAG(s, f) \ 928 do {\ 929 if (strcmp(cp, (s)) == 0) {\ 930 if (clear)\ 931 newflags &= ~(f);\ 932 else\ 933 newflags |= (f);\ 934 }\ 935 } while (0) 936/* 937 * XXX: this macro is not 100% correct, in that it matches "nud" against 938 * "nudbogus". But we just let it go since this is minor. 939 */ 940#define SETVALUE(f, v) \ 941 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 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 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