ndp.c revision 294203
1/* $FreeBSD: stable/10/usr.sbin/ndp/ndp.c 294203 2016-01-17 06:02:59Z 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_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 130static char host_buf[NI_MAXHOST]; /* getnameinfo() */ 131static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ 132 133static int file(char *); 134static void getsocket(void); 135static int set(int, char **); 136static void get(char *); 137static int delete(char *); 138static void dump(struct sockaddr_in6 *, int); 139static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int); 140static char *ether_str(struct sockaddr_dl *); 141static int ndp_ether_aton(char *, u_char *); 142static void usage(void); 143static int rtmsg(int); 144static void ifinfo(char *, int, char **); 145static void rtrlist(void); 146static void plist(void); 147static void pfx_flush(void); 148static void rtr_flush(void); 149static void harmonize_rtr(void); 150#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 151static void getdefif(void); 152static void setdefif(char *); 153#endif 154static char *sec2str(time_t); 155static void ts_print(const struct timeval *); 156 157static char *rtpref_str[] = { 158 "medium", /* 00 */ 159 "high", /* 01 */ 160 "rsv", /* 10 */ 161 "low" /* 11 */ 162}; 163 164int 165main(int argc, char **argv) 166{ 167 int ch, mode = 0; 168 char *arg = NULL; 169 170 pid = getpid(); 171 thiszone = gmt2local(0); 172 while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1) 173 switch (ch) { 174 case 'a': 175 case 'c': 176 case 'p': 177 case 'r': 178 case 'H': 179 case 'P': 180 case 'R': 181 case 's': 182 case 'I': 183 if (mode) { 184 usage(); 185 /*NOTREACHED*/ 186 } 187 mode = ch; 188 arg = NULL; 189 break; 190 case 'f': 191 exit(file(optarg) ? 1 : 0); 192 case 'd': 193 case 'i': 194 if (mode) { 195 usage(); 196 /*NOTREACHED*/ 197 } 198 mode = ch; 199 arg = optarg; 200 break; 201 case 'n': 202 nflag = 1; 203 break; 204 case 't': 205 tflag = 1; 206 break; 207 case 'A': 208 if (mode) { 209 usage(); 210 /*NOTREACHED*/ 211 } 212 mode = 'a'; 213 repeat = atoi(optarg); 214 if (repeat < 0) { 215 usage(); 216 /*NOTREACHED*/ 217 } 218 break; 219 default: 220 usage(); 221 } 222 223 argc -= optind; 224 argv += optind; 225 226 switch (mode) { 227 case 'a': 228 case 'c': 229 if (argc != 0) { 230 usage(); 231 /*NOTREACHED*/ 232 } 233 dump(0, mode == 'c'); 234 break; 235 case 'd': 236 if (argc != 0) { 237 usage(); 238 /*NOTREACHED*/ 239 } 240 delete(arg); 241 break; 242 case 'I': 243#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 244 if (argc > 1) { 245 usage(); 246 /*NOTREACHED*/ 247 } else if (argc == 1) { 248 if (strcmp(*argv, "delete") == 0 || 249 if_nametoindex(*argv)) 250 setdefif(*argv); 251 else 252 errx(1, "invalid interface %s", *argv); 253 } 254 getdefif(); /* always call it to print the result */ 255 break; 256#else 257 errx(1, "not supported yet"); 258 /*NOTREACHED*/ 259#endif 260 case 'p': 261 if (argc != 0) { 262 usage(); 263 /*NOTREACHED*/ 264 } 265 plist(); 266 break; 267 case 'i': 268 ifinfo(arg, argc, argv); 269 break; 270 case 'r': 271 if (argc != 0) { 272 usage(); 273 /*NOTREACHED*/ 274 } 275 rtrlist(); 276 break; 277 case 's': 278 if (argc < 2 || argc > 4) 279 usage(); 280 exit(set(argc, argv) ? 1 : 0); 281 case 'H': 282 if (argc != 0) { 283 usage(); 284 /*NOTREACHED*/ 285 } 286 harmonize_rtr(); 287 break; 288 case 'P': 289 if (argc != 0) { 290 usage(); 291 /*NOTREACHED*/ 292 } 293 pfx_flush(); 294 break; 295 case 'R': 296 if (argc != 0) { 297 usage(); 298 /*NOTREACHED*/ 299 } 300 rtr_flush(); 301 break; 302 case 0: 303 if (argc != 1) { 304 usage(); 305 /*NOTREACHED*/ 306 } 307 get(argv[0]); 308 break; 309 } 310 exit(0); 311} 312 313/* 314 * Process a file to set standard ndp entries 315 */ 316static int 317file(char *name) 318{ 319 FILE *fp; 320 int i, retval; 321 char line[100], arg[5][50], *args[5], *p; 322 323 if ((fp = fopen(name, "r")) == NULL) 324 err(1, "cannot open %s", name); 325 args[0] = &arg[0][0]; 326 args[1] = &arg[1][0]; 327 args[2] = &arg[2][0]; 328 args[3] = &arg[3][0]; 329 args[4] = &arg[4][0]; 330 retval = 0; 331 while (fgets(line, sizeof(line), fp) != NULL) { 332 if ((p = strchr(line, '#')) != NULL) 333 *p = '\0'; 334 for (p = line; isblank(*p); p++); 335 if (*p == '\n' || *p == '\0') 336 continue; 337 i = sscanf(line, "%49s %49s %49s %49s %49s", 338 arg[0], arg[1], arg[2], arg[3], arg[4]); 339 if (i < 2) { 340 warnx("bad line: %s", line); 341 retval = 1; 342 continue; 343 } 344 if (set(i, args)) 345 retval = 1; 346 } 347 fclose(fp); 348 return (retval); 349} 350 351static void 352getsocket() 353{ 354 if (s < 0) { 355 s = socket(PF_ROUTE, SOCK_RAW, 0); 356 if (s < 0) { 357 err(1, "socket"); 358 /* NOTREACHED */ 359 } 360 } 361} 362 363static struct sockaddr_in6 so_mask = { 364 .sin6_len = sizeof(so_mask), 365 .sin6_family = AF_INET6 366}; 367static struct sockaddr_in6 blank_sin = { 368 .sin6_len = sizeof(blank_sin), 369 .sin6_family = AF_INET6 370}; 371static struct sockaddr_in6 sin_m; 372static struct sockaddr_dl blank_sdl = { 373 .sdl_len = sizeof(blank_sdl), 374 .sdl_family = AF_LINK 375}; 376static struct sockaddr_dl sdl_m; 377static time_t expire_time; 378static int flags, found_entry; 379static struct { 380 struct rt_msghdr m_rtm; 381 char m_space[512]; 382} m_rtmsg; 383 384/* 385 * Set an individual neighbor cache entry 386 */ 387static int 388set(int argc, char **argv) 389{ 390 register struct sockaddr_in6 *sin = &sin_m; 391 register struct sockaddr_dl *sdl; 392 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); 393 struct addrinfo hints, *res; 394 int gai_error; 395 u_char *ea; 396 char *host = argv[0], *eaddr = argv[1]; 397 398 getsocket(); 399 argc -= 2; 400 argv += 2; 401 sdl_m = blank_sdl; 402 sin_m = blank_sin; 403 404 bzero(&hints, sizeof(hints)); 405 hints.ai_family = AF_INET6; 406 gai_error = getaddrinfo(host, NULL, &hints, &res); 407 if (gai_error) { 408 fprintf(stderr, "ndp: %s: %s\n", host, 409 gai_strerror(gai_error)); 410 return 1; 411 } 412 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 413 sin->sin6_scope_id = 414 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 415 ea = (u_char *)LLADDR(&sdl_m); 416 if (ndp_ether_aton(eaddr, ea) == 0) 417 sdl_m.sdl_alen = 6; 418 flags = expire_time = 0; 419 while (argc-- > 0) { 420 if (strncmp(argv[0], "temp", 4) == 0) { 421 struct timeval now; 422 423 gettimeofday(&now, 0); 424 expire_time = now.tv_sec + 20 * 60; 425 } else if (strncmp(argv[0], "proxy", 5) == 0) 426 flags |= RTF_ANNOUNCE; 427 argv++; 428 } 429 if (rtmsg(RTM_GET) < 0) { 430 errx(1, "RTM_GET(%s) failed", host); 431 /* NOTREACHED */ 432 } 433 sin = (struct sockaddr_in6 *)(rtm + 1); 434 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 435 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 436 if (sdl->sdl_family == AF_LINK && 437 !(rtm->rtm_flags & RTF_GATEWAY)) { 438 switch (sdl->sdl_type) { 439 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 440 case IFT_ISO88024: case IFT_ISO88025: 441 case IFT_L2VLAN: case IFT_BRIDGE: 442 goto overwrite; 443 } 444 } 445 fprintf(stderr, "set: cannot configure a new entry\n"); 446 return 1; 447 } 448 449overwrite: 450 if (sdl->sdl_family != AF_LINK) { 451 printf("cannot intuit interface index and type for %s\n", host); 452 return (1); 453 } 454 sdl_m.sdl_type = sdl->sdl_type; 455 sdl_m.sdl_index = sdl->sdl_index; 456 return (rtmsg(RTM_ADD)); 457} 458 459/* 460 * Display an individual neighbor cache entry 461 */ 462static void 463get(char *host) 464{ 465 struct sockaddr_in6 *sin = &sin_m; 466 struct addrinfo hints, *res; 467 int gai_error; 468 469 sin_m = blank_sin; 470 bzero(&hints, sizeof(hints)); 471 hints.ai_family = AF_INET6; 472 gai_error = getaddrinfo(host, NULL, &hints, &res); 473 if (gai_error) { 474 fprintf(stderr, "ndp: %s: %s\n", host, 475 gai_strerror(gai_error)); 476 return; 477 } 478 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 479 sin->sin6_scope_id = 480 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 481 dump(sin, 0); 482 if (found_entry == 0) { 483 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 484 sizeof(host_buf), NULL ,0, 485 (nflag ? NI_NUMERICHOST : 0)); 486 printf("%s (%s) -- no entry\n", host, host_buf); 487 exit(1); 488 } 489} 490 491/* 492 * Delete a neighbor cache entry 493 */ 494static int 495delete(char *host) 496{ 497 struct sockaddr_in6 *sin = &sin_m; 498 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 499 register char *cp = m_rtmsg.m_space; 500 struct sockaddr_dl *sdl; 501 struct addrinfo hints, *res; 502 int gai_error; 503 504 getsocket(); 505 sin_m = blank_sin; 506 507 bzero(&hints, sizeof(hints)); 508 hints.ai_family = AF_INET6; 509 gai_error = getaddrinfo(host, NULL, &hints, &res); 510 if (gai_error) { 511 fprintf(stderr, "ndp: %s: %s\n", host, 512 gai_strerror(gai_error)); 513 return 1; 514 } 515 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; 516 sin->sin6_scope_id = 517 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 518 if (rtmsg(RTM_GET) < 0) { 519 errx(1, "RTM_GET(%s) failed", host); 520 /* NOTREACHED */ 521 } 522 sin = (struct sockaddr_in6 *)(rtm + 1); 523 sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin); 524 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { 525 if (sdl->sdl_family == AF_LINK && 526 !(rtm->rtm_flags & RTF_GATEWAY)) { 527 goto delete; 528 } 529 fprintf(stderr, "delete: cannot delete non-NDP entry\n"); 530 return 1; 531 } 532 533delete: 534 if (sdl->sdl_family != AF_LINK) { 535 printf("cannot locate %s\n", host); 536 return (1); 537 } 538 /* 539 * need to reinit the field because it has rt_key 540 * but we want the actual address 541 */ 542 NEXTADDR(RTA_DST, sin_m); 543 rtm->rtm_flags |= RTF_LLDATA; 544 if (rtmsg(RTM_DELETE) == 0) { 545 getnameinfo((struct sockaddr *)sin, 546 sin->sin6_len, host_buf, 547 sizeof(host_buf), NULL, 0, 548 (nflag ? NI_NUMERICHOST : 0)); 549 printf("%s (%s) deleted\n", host, host_buf); 550 } 551 552 return 0; 553} 554 555#define W_ADDR 36 556#define W_LL 17 557#define W_IF 6 558 559/* 560 * Dump the entire neighbor cache 561 */ 562static void 563dump(struct sockaddr_in6 *addr, 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->sin6_addr, 636 &sin->sin6_addr) == 0 || 637 addr->sin6_scope_id != sin->sin6_scope_id) 638 continue; 639 found_entry = 1; 640 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) 641 continue; 642 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || 643 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { 644 /* XXX: should scope id be filled in the kernel? */ 645 if (sin->sin6_scope_id == 0) 646 sin->sin6_scope_id = sdl->sdl_index; 647 } 648 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, 649 sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); 650 if (cflag) { 651#ifdef RTF_WASCLONED 652 if (rtm->rtm_flags & RTF_WASCLONED) 653 delete(host_buf); 654#elif defined(RTF_CLONED) 655 if (rtm->rtm_flags & RTF_CLONED) 656 delete(host_buf); 657#else 658 if (rtm->rtm_flags & RTF_PINNED) 659 continue; 660 delete(host_buf); 661#endif 662 continue; 663 } 664 gettimeofday(&now, 0); 665 if (tflag) 666 ts_print(&now); 667 668 addrwidth = strlen(host_buf); 669 if (addrwidth < W_ADDR) 670 addrwidth = W_ADDR; 671 llwidth = strlen(ether_str(sdl)); 672 if (W_ADDR + W_LL - addrwidth > llwidth) 673 llwidth = W_ADDR + W_LL - addrwidth; 674 ifname = if_indextoname(sdl->sdl_index, ifix_buf); 675 if (!ifname) 676 ifname = "?"; 677 ifwidth = strlen(ifname); 678 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) 679 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; 680 681 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, 682 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname); 683 684 /* Print neighbor discovery specific information */ 685 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1); 686 if (nbi) { 687 if (nbi->expire > now.tv_sec) { 688 printf(" %-9.9s", 689 sec2str(nbi->expire - now.tv_sec)); 690 } else if (nbi->expire == 0) 691 printf(" %-9.9s", "permanent"); 692 else 693 printf(" %-9.9s", "expired"); 694 695 switch (nbi->state) { 696 case ND6_LLINFO_NOSTATE: 697 printf(" N"); 698 break; 699#ifdef ND6_LLINFO_WAITDELETE 700 case ND6_LLINFO_WAITDELETE: 701 printf(" W"); 702 break; 703#endif 704 case ND6_LLINFO_INCOMPLETE: 705 printf(" I"); 706 break; 707 case ND6_LLINFO_REACHABLE: 708 printf(" R"); 709 break; 710 case ND6_LLINFO_STALE: 711 printf(" S"); 712 break; 713 case ND6_LLINFO_DELAY: 714 printf(" D"); 715 break; 716 case ND6_LLINFO_PROBE: 717 printf(" P"); 718 break; 719 default: 720 printf(" ?"); 721 break; 722 } 723 724 isrouter = nbi->isrouter; 725 prbs = nbi->asked; 726 } else { 727 warnx("failed to get neighbor information"); 728 printf(" "); 729 } 730 731 /* 732 * other flags. R: router, P: proxy, W: ?? 733 */ 734 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) { 735 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 736 isrouter ? "R" : "", 737 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 738 } else { 739 sin = (struct sockaddr_in6 *) 740 (sdl->sdl_len + (char *)sdl); 741#if 0 /* W and P are mystery even for us */ 742 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s", 743 isrouter ? "R" : "", 744 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "", 745 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "", 746 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 747#else 748 snprintf(flgbuf, sizeof(flgbuf), "%s%s", 749 isrouter ? "R" : "", 750 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); 751#endif 752 } 753 printf(" %s", flgbuf); 754 755 if (prbs) 756 printf(" %d", prbs); 757 758 printf("\n"); 759 } 760 if (buf != NULL) 761 free(buf); 762 763 if (repeat) { 764 printf("\n"); 765 fflush(stdout); 766 sleep(repeat); 767 goto again; 768 } 769} 770 771static struct in6_nbrinfo * 772getnbrinfo(struct in6_addr *addr, int ifindex, int warning) 773{ 774 static struct in6_nbrinfo nbi; 775 int s; 776 777 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 778 err(1, "socket"); 779 780 bzero(&nbi, sizeof(nbi)); 781 if_indextoname(ifindex, nbi.ifname); 782 nbi.addr = *addr; 783 if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { 784 if (warning) 785 warn("ioctl(SIOCGNBRINFO_IN6)"); 786 close(s); 787 return(NULL); 788 } 789 790 close(s); 791 return(&nbi); 792} 793 794static char * 795ether_str(struct sockaddr_dl *sdl) 796{ 797 static char hbuf[NI_MAXHOST]; 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 811static int 812ndp_ether_aton(char *a, u_char *n) 813{ 814 int i, o[6]; 815 816 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], 817 &o[3], &o[4], &o[5]); 818 if (i != 6) { 819 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); 820 return (1); 821 } 822 for (i = 0; i < 6; i++) 823 n[i] = o[i]; 824 return (0); 825} 826 827static void 828usage() 829{ 830 printf("usage: ndp [-nt] hostname\n"); 831 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n"); 832 printf(" ndp [-nt] -A wait\n"); 833 printf(" ndp [-nt] -d hostname\n"); 834 printf(" ndp [-nt] -f filename\n"); 835 printf(" ndp [-nt] -i interface [flags...]\n"); 836#ifdef SIOCSDEFIFACE_IN6 837 printf(" ndp [-nt] -I [interface|delete]\n"); 838#endif 839 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n"); 840 exit(1); 841} 842 843static int 844rtmsg(int cmd) 845{ 846 static int seq; 847 int rlen; 848 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; 849 register char *cp = m_rtmsg.m_space; 850 register int l; 851 852 errno = 0; 853 if (cmd == RTM_DELETE) 854 goto doit; 855 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 856 rtm->rtm_flags = flags; 857 rtm->rtm_version = RTM_VERSION; 858 859 switch (cmd) { 860 default: 861 fprintf(stderr, "ndp: internal wrong cmd\n"); 862 exit(1); 863 case RTM_ADD: 864 rtm->rtm_addrs |= RTA_GATEWAY; 865 if (expire_time) { 866 rtm->rtm_rmx.rmx_expire = expire_time; 867 rtm->rtm_inits = RTV_EXPIRE; 868 } 869 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); 870#if 0 /* we don't support ipv6addr/128 type proxying */ 871 if (rtm->rtm_flags & RTF_ANNOUNCE) { 872 rtm->rtm_flags &= ~RTF_HOST; 873 rtm->rtm_addrs |= RTA_NETMASK; 874 } 875#endif 876 /* FALLTHROUGH */ 877 case RTM_GET: 878 rtm->rtm_addrs |= RTA_DST; 879 } 880 881 NEXTADDR(RTA_DST, sin_m); 882 NEXTADDR(RTA_GATEWAY, sdl_m); 883#if 0 /* we don't support ipv6addr/128 type proxying */ 884 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); 885 NEXTADDR(RTA_NETMASK, so_mask); 886#endif 887 888 rtm->rtm_msglen = cp - (char *)&m_rtmsg; 889doit: 890 l = rtm->rtm_msglen; 891 rtm->rtm_seq = ++seq; 892 rtm->rtm_type = cmd; 893 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 894 if (errno != ESRCH || cmd != RTM_DELETE) { 895 err(1, "writing to routing socket"); 896 /* NOTREACHED */ 897 } 898 } 899 do { 900 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 901 } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 902 if (l < 0) 903 (void) fprintf(stderr, "ndp: read from routing socket: %s\n", 904 strerror(errno)); 905 return (0); 906} 907 908static void 909ifinfo(char *ifname, int argc, char **argv) 910{ 911 struct in6_ndireq nd; 912 int i, s; 913 u_int32_t newflags; 914#ifdef IPV6CTL_USETEMPADDR 915 u_int8_t nullbuf[8]; 916#endif 917 918 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 919 err(1, "socket"); 920 /* NOTREACHED */ 921 } 922 bzero(&nd, sizeof(nd)); 923 strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); 924 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 925 err(1, "ioctl(SIOCGIFINFO_IN6)"); 926 /* NOTREACHED */ 927 } 928#define ND nd.ndi 929 newflags = ND.flags; 930 for (i = 0; i < argc; i++) { 931 int clear = 0; 932 char *cp = argv[i]; 933 934 if (*cp == '-') { 935 clear = 1; 936 cp++; 937 } 938 939#define SETFLAG(s, f) \ 940 do {\ 941 if (strcmp(cp, (s)) == 0) {\ 942 if (clear)\ 943 newflags &= ~(f);\ 944 else\ 945 newflags |= (f);\ 946 }\ 947 } while (0) 948/* 949 * XXX: this macro is not 100% correct, in that it matches "nud" against 950 * "nudbogus". But we just let it go since this is minor. 951 */ 952#define SETVALUE(f, v) \ 953 do { \ 954 char *valptr; \ 955 unsigned long newval; \ 956 v = 0; /* unspecified */ \ 957 if (strncmp(cp, f, strlen(f)) == 0) { \ 958 valptr = strchr(cp, '='); \ 959 if (valptr == NULL) \ 960 err(1, "syntax error in %s field", (f)); \ 961 errno = 0; \ 962 newval = strtoul(++valptr, NULL, 0); \ 963 if (errno) \ 964 err(1, "syntax error in %s's value", (f)); \ 965 v = newval; \ 966 } \ 967 } while (0) 968 969 SETFLAG("disabled", ND6_IFF_IFDISABLED); 970 SETFLAG("nud", ND6_IFF_PERFORMNUD); 971#ifdef ND6_IFF_ACCEPT_RTADV 972 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV); 973#endif 974#ifdef ND6_IFF_AUTO_LINKLOCAL 975 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL); 976#endif 977#ifdef ND6_IFF_NO_PREFER_IFACE 978 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE); 979#endif 980 SETVALUE("basereachable", ND.basereachable); 981 SETVALUE("retrans", ND.retrans); 982 SETVALUE("curhlim", ND.chlim); 983 984 ND.flags = newflags; 985 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) { 986 err(1, "ioctl(SIOCSIFINFO_IN6)"); 987 /* NOTREACHED */ 988 } 989#undef SETFLAG 990#undef SETVALUE 991 } 992 993 if (!ND.initialized) { 994 errx(1, "%s: not initialized yet", ifname); 995 /* NOTREACHED */ 996 } 997 998 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { 999 err(1, "ioctl(SIOCGIFINFO_IN6)"); 1000 /* NOTREACHED */ 1001 } 1002 printf("linkmtu=%d", ND.linkmtu); 1003 printf(", maxmtu=%d", ND.maxmtu); 1004 printf(", curhlim=%d", ND.chlim); 1005 printf(", basereachable=%ds%dms", 1006 ND.basereachable / 1000, ND.basereachable % 1000); 1007 printf(", reachable=%ds", ND.reachable); 1008 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); 1009#ifdef IPV6CTL_USETEMPADDR 1010 memset(nullbuf, 0, sizeof(nullbuf)); 1011 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) { 1012 int j; 1013 u_int8_t *rbuf; 1014 1015 for (i = 0; i < 3; i++) { 1016 switch (i) { 1017 case 0: 1018 printf("\nRandom seed(0): "); 1019 rbuf = ND.randomseed0; 1020 break; 1021 case 1: 1022 printf("\nRandom seed(1): "); 1023 rbuf = ND.randomseed1; 1024 break; 1025 case 2: 1026 printf("\nRandom ID: "); 1027 rbuf = ND.randomid; 1028 break; 1029 default: 1030 errx(1, "impossible case for tempaddr display"); 1031 } 1032 for (j = 0; j < 8; j++) 1033 printf("%02x", rbuf[j]); 1034 } 1035 } 1036#endif 1037 if (ND.flags) { 1038 printf("\nFlags: "); 1039#ifdef ND6_IFF_IFDISABLED 1040 if ((ND.flags & ND6_IFF_IFDISABLED)) 1041 printf("disabled "); 1042#endif 1043 if ((ND.flags & ND6_IFF_PERFORMNUD)) 1044 printf("nud "); 1045#ifdef ND6_IFF_ACCEPT_RTADV 1046 if ((ND.flags & ND6_IFF_ACCEPT_RTADV)) 1047 printf("accept_rtadv "); 1048#endif 1049#ifdef ND6_IFF_AUTO_LINKLOCAL 1050 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL)) 1051 printf("auto_linklocal "); 1052#endif 1053#ifdef ND6_IFF_NO_PREFER_IFACE 1054 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE)) 1055 printf("no_prefer_iface "); 1056#endif 1057 } 1058 putc('\n', stdout); 1059#undef ND 1060 1061 close(s); 1062} 1063 1064#ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */ 1065#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ 1066#endif 1067 1068static void 1069rtrlist() 1070{ 1071 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST }; 1072 char *buf; 1073 struct in6_defrouter *p, *ep; 1074 size_t l; 1075 struct timeval now; 1076 1077 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1078 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1079 /*NOTREACHED*/ 1080 } 1081 if (l == 0) 1082 return; 1083 buf = malloc(l); 1084 if (!buf) { 1085 err(1, "malloc"); 1086 /*NOTREACHED*/ 1087 } 1088 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1089 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)"); 1090 /*NOTREACHED*/ 1091 } 1092 1093 ep = (struct in6_defrouter *)(buf + l); 1094 for (p = (struct in6_defrouter *)buf; p < ep; p++) { 1095 int rtpref; 1096 1097 if (getnameinfo((struct sockaddr *)&p->rtaddr, 1098 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0, 1099 (nflag ? NI_NUMERICHOST : 0)) != 0) 1100 strlcpy(host_buf, "?", sizeof(host_buf)); 1101 1102 printf("%s if=%s", host_buf, 1103 if_indextoname(p->if_index, ifix_buf)); 1104 printf(", flags=%s%s", 1105 p->flags & ND_RA_FLAG_MANAGED ? "M" : "", 1106 p->flags & ND_RA_FLAG_OTHER ? "O" : ""); 1107 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff; 1108 printf(", pref=%s", rtpref_str[rtpref]); 1109 1110 gettimeofday(&now, 0); 1111 if (p->expire == 0) 1112 printf(", expire=Never\n"); 1113 else 1114 printf(", expire=%s\n", 1115 sec2str(p->expire - now.tv_sec)); 1116 } 1117 free(buf); 1118} 1119 1120static void 1121plist() 1122{ 1123 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST }; 1124 char *buf; 1125 struct in6_prefix *p, *ep, *n; 1126 struct sockaddr_in6 *advrtr; 1127 size_t l; 1128 struct timeval now; 1129 const int niflags = NI_NUMERICHOST; 1130 int ninflags = nflag ? NI_NUMERICHOST : 0; 1131 char namebuf[NI_MAXHOST]; 1132 1133 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) { 1134 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1135 /*NOTREACHED*/ 1136 } 1137 buf = malloc(l); 1138 if (!buf) { 1139 err(1, "malloc"); 1140 /*NOTREACHED*/ 1141 } 1142 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 1143 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)"); 1144 /*NOTREACHED*/ 1145 } 1146 1147 ep = (struct in6_prefix *)(buf + l); 1148 for (p = (struct in6_prefix *)buf; p < ep; p = n) { 1149 advrtr = (struct sockaddr_in6 *)(p + 1); 1150 n = (struct in6_prefix *)&advrtr[p->advrtrs]; 1151 1152 if (getnameinfo((struct sockaddr *)&p->prefix, 1153 p->prefix.sin6_len, namebuf, sizeof(namebuf), 1154 NULL, 0, niflags) != 0) 1155 strlcpy(namebuf, "?", sizeof(namebuf)); 1156 printf("%s/%d if=%s\n", namebuf, p->prefixlen, 1157 if_indextoname(p->if_index, ifix_buf)); 1158 1159 gettimeofday(&now, 0); 1160 /* 1161 * meaning of fields, especially flags, is very different 1162 * by origin. notify the difference to the users. 1163 */ 1164 printf("flags=%s%s%s%s%s", 1165 p->raflags.onlink ? "L" : "", 1166 p->raflags.autonomous ? "A" : "", 1167 (p->flags & NDPRF_ONLINK) != 0 ? "O" : "", 1168 (p->flags & NDPRF_DETACHED) != 0 ? "D" : "", 1169#ifdef NDPRF_HOME 1170 (p->flags & NDPRF_HOME) != 0 ? "H" : "" 1171#else 1172 "" 1173#endif 1174 ); 1175 if (p->vltime == ND6_INFINITE_LIFETIME) 1176 printf(" vltime=infinity"); 1177 else 1178 printf(" vltime=%lu", (unsigned long)p->vltime); 1179 if (p->pltime == ND6_INFINITE_LIFETIME) 1180 printf(", pltime=infinity"); 1181 else 1182 printf(", pltime=%lu", (unsigned long)p->pltime); 1183 if (p->expire == 0) 1184 printf(", expire=Never"); 1185 else if (p->expire >= now.tv_sec) 1186 printf(", expire=%s", 1187 sec2str(p->expire - now.tv_sec)); 1188 else 1189 printf(", expired"); 1190 printf(", ref=%d", p->refcnt); 1191 printf("\n"); 1192 /* 1193 * "advertising router" list is meaningful only if the prefix 1194 * information is from RA. 1195 */ 1196 if (p->advrtrs) { 1197 int j; 1198 struct sockaddr_in6 *sin6; 1199 1200 sin6 = advrtr; 1201 printf(" advertised by\n"); 1202 for (j = 0; j < p->advrtrs; j++) { 1203 struct in6_nbrinfo *nbi; 1204 1205 if (getnameinfo((struct sockaddr *)sin6, 1206 sin6->sin6_len, namebuf, sizeof(namebuf), 1207 NULL, 0, ninflags) != 0) 1208 strlcpy(namebuf, "?", sizeof(namebuf)); 1209 printf(" %s", namebuf); 1210 1211 nbi = getnbrinfo(&sin6->sin6_addr, 1212 p->if_index, 0); 1213 if (nbi) { 1214 switch (nbi->state) { 1215 case ND6_LLINFO_REACHABLE: 1216 case ND6_LLINFO_STALE: 1217 case ND6_LLINFO_DELAY: 1218 case ND6_LLINFO_PROBE: 1219 printf(" (reachable)\n"); 1220 break; 1221 default: 1222 printf(" (unreachable)\n"); 1223 } 1224 } else 1225 printf(" (no neighbor state)\n"); 1226 sin6++; 1227 } 1228 } else 1229 printf(" No advertising router\n"); 1230 } 1231 free(buf); 1232} 1233 1234static void 1235pfx_flush() 1236{ 1237 char dummyif[IFNAMSIZ+8]; 1238 int s; 1239 1240 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1241 err(1, "socket"); 1242 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1243 if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0) 1244 err(1, "ioctl(SIOCSPFXFLUSH_IN6)"); 1245} 1246 1247static void 1248rtr_flush() 1249{ 1250 char dummyif[IFNAMSIZ+8]; 1251 int s; 1252 1253 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1254 err(1, "socket"); 1255 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1256 if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0) 1257 err(1, "ioctl(SIOCSRTRFLUSH_IN6)"); 1258 1259 close(s); 1260} 1261 1262static void 1263harmonize_rtr() 1264{ 1265 char dummyif[IFNAMSIZ+8]; 1266 int s; 1267 1268 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1269 err(1, "socket"); 1270 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */ 1271 if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) 1272 err(1, "ioctl(SIOCSNDFLUSH_IN6)"); 1273 1274 close(s); 1275} 1276 1277#ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */ 1278static void 1279setdefif(char *ifname) 1280{ 1281 struct in6_ndifreq ndifreq; 1282 unsigned int ifindex; 1283 1284 if (strcasecmp(ifname, "delete") == 0) 1285 ifindex = 0; 1286 else { 1287 if ((ifindex = if_nametoindex(ifname)) == 0) 1288 err(1, "failed to resolve i/f index for %s", ifname); 1289 } 1290 1291 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1292 err(1, "socket"); 1293 1294 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1295 ndifreq.ifindex = ifindex; 1296 1297 if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1298 err(1, "ioctl(SIOCSDEFIFACE_IN6)"); 1299 1300 close(s); 1301} 1302 1303static void 1304getdefif() 1305{ 1306 struct in6_ndifreq ndifreq; 1307 char ifname[IFNAMSIZ+8]; 1308 1309 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1310 err(1, "socket"); 1311 1312 memset(&ndifreq, 0, sizeof(ndifreq)); 1313 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */ 1314 1315 if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0) 1316 err(1, "ioctl(SIOCGDEFIFACE_IN6)"); 1317 1318 if (ndifreq.ifindex == 0) 1319 printf("No default interface.\n"); 1320 else { 1321 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL) 1322 err(1, "failed to resolve ifname for index %lu", 1323 ndifreq.ifindex); 1324 printf("ND default interface = %s\n", ifname); 1325 } 1326 1327 close(s); 1328} 1329#endif 1330 1331static char * 1332sec2str(time_t total) 1333{ 1334 static char result[256]; 1335 int days, hours, mins, secs; 1336 int first = 1; 1337 char *p = result; 1338 char *ep = &result[sizeof(result)]; 1339 int n; 1340 1341 days = total / 3600 / 24; 1342 hours = (total / 3600) % 24; 1343 mins = (total / 60) % 60; 1344 secs = total % 60; 1345 1346 if (days) { 1347 first = 0; 1348 n = snprintf(p, ep - p, "%dd", days); 1349 if (n < 0 || n >= ep - p) 1350 return "?"; 1351 p += n; 1352 } 1353 if (!first || hours) { 1354 first = 0; 1355 n = snprintf(p, ep - p, "%dh", hours); 1356 if (n < 0 || n >= ep - p) 1357 return "?"; 1358 p += n; 1359 } 1360 if (!first || mins) { 1361 first = 0; 1362 n = snprintf(p, ep - p, "%dm", mins); 1363 if (n < 0 || n >= ep - p) 1364 return "?"; 1365 p += n; 1366 } 1367 snprintf(p, ep - p, "%ds", secs); 1368 1369 return(result); 1370} 1371 1372/* 1373 * Print the timestamp 1374 * from tcpdump/util.c 1375 */ 1376static void 1377ts_print(const struct timeval *tvp) 1378{ 1379 int s; 1380 1381 /* Default */ 1382 s = (tvp->tv_sec + thiszone) % 86400; 1383 (void)printf("%02d:%02d:%02d.%06u ", 1384 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); 1385} 1386 1387#undef NEXTADDR 1388