1 /* 2 * Copyright (c) 1983, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 39 #endif 40 #endif /* not lint */ 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/param.h> 46 #include <sys/file.h> 47 #include <sys/socket.h> 48 #include <sys/ioctl.h> 49 #include <sys/sysctl.h> 50 #include <sys/types.h> 51 #include <sys/queue.h> 52 53 #include <net/if.h> 54 #include <net/route.h> 55 #include <net/if_dl.h> 56 #include <netinet/in.h> 57 #include <netinet/if_ether.h> 58 #include <netatalk/at.h> 59 #include <arpa/inet.h> 60 #include <netdb.h> 61 62 #include <ctype.h> 63 #include <err.h> 64 #include <errno.h> 65 #include <paths.h> 66 #include <stdbool.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <sysexits.h> 71 #include <time.h> 72 #include <unistd.h> 73 #include <ifaddrs.h> 74 75 #define ATALK_BUF_SIZE 20 76 77 struct fibl { 78 TAILQ_ENTRY(fibl) fl_next; 79 80 int fl_num; 81 int fl_error; 82 int fl_errno; 83 }; 84 85 static struct keytab { 86 const char *kt_cp; 87 int kt_i; 88 } const keywords[] = { 89 #include "keywords.h" 90 {0, 0} 91 }; 92 93 static struct sockaddr_storage so[RTAX_MAX]; 94 static int pid, rtm_addrs; 95 static int s; 96 static int forcehost, forcenet, nflag, af, qflag, tflag; 97 static int verbose, aflen; 98 static int locking, lockrest, debugonly; 99 static struct rt_metrics rt_metrics; 100 static u_long rtm_inits; 101 static uid_t uid; 102 static int defaultfib; 103 static int numfibs; 104 static char domain[MAXHOSTNAMELEN + 1]; 105 static bool domain_initialized; 106 static int rtm_seq; 107 static char rt_line[NI_MAXHOST]; 108 static char net_line[MAXHOSTNAMELEN + 1]; 109 110 static struct { 111 struct rt_msghdr m_rtm; 112 char m_space[512]; 113 } m_rtmsg; 114 115 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 116 117 static int atalk_aton(const char *, struct at_addr *); 118 static char *atalk_ntoa(struct at_addr, char [ATALK_BUF_SIZE]); 119 static void printb(int, const char *); 120 static void flushroutes(int argc, char *argv[]); 121 static int flushroutes_fib(int); 122 static int getaddr(int, char *, struct hostent **, int); 123 static int keyword(const char *); 124 #ifdef INET 125 static void inet_makenetandmask(u_long, struct sockaddr_in *, 126 struct sockaddr_in *, u_long); 127 #endif 128 #ifdef INET6 129 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 130 #endif 131 static void interfaces(void); 132 static void monitor(int, char*[]); 133 static const char *netname(struct sockaddr *); 134 static void newroute(int, char **); 135 static int newroute_fib(int, char *, int); 136 static void pmsg_addrs(char *, int, size_t); 137 static void pmsg_common(struct rt_msghdr *, size_t); 138 static int prefixlen(const char *); 139 static void print_getmsg(struct rt_msghdr *, int, int); 140 static void print_rtmsg(struct rt_msghdr *, size_t); 141 static const char *routename(struct sockaddr *); 142 static int rtmsg(int, int, int); 143 static void set_metric(char *, int); 144 static int set_sofib(int); 145 static void sockaddr(char *, struct sockaddr *, size_t); 146 static void sodump(struct sockaddr *, const char *); 147 static int fiboptlist_csv(const char *, struct fibl_head_t *); 148 static int fiboptlist_range(const char *, struct fibl_head_t *); 149 150 static void usage(const char *) __dead2; 151 152 static void 153 usage(const char *cp) 154 { 155 if (cp != NULL) 156 warnx("bad keyword: %s", cp); 157 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 158 /* NOTREACHED */ 159 } 160 161 int 162 main(int argc, char **argv) 163 { 164 int ch; 165 size_t len; 166 167 if (argc < 2) 168 usage(NULL); 169 170 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 171 switch(ch) { 172 case '4': 173 #ifdef INET 174 af = AF_INET; 175 aflen = sizeof(struct sockaddr_in); 176 #else 177 errx(1, "IPv4 support is not compiled in"); 178 #endif 179 break; 180 case '6': 181 #ifdef INET6 182 af = AF_INET6; 183 aflen = sizeof(struct sockaddr_in6); 184 #else 185 errx(1, "IPv6 support is not compiled in"); 186 #endif 187 break; 188 case 'n': 189 nflag = 1; 190 break; 191 case 'q': 192 qflag = 1; 193 break; 194 case 'v': 195 verbose = 1; 196 break; 197 case 't': 198 tflag = 1; 199 break; 200 case 'd': 201 debugonly = 1; 202 break; 203 case '?': 204 default: 205 usage(NULL); 206 } 207 argc -= optind; 208 argv += optind; 209 210 pid = getpid(); 211 uid = geteuid(); 212 if (tflag) 213 s = open(_PATH_DEVNULL, O_WRONLY, 0); 214 else 215 s = socket(PF_ROUTE, SOCK_RAW, 0); 216 if (s < 0) 217 err(EX_OSERR, "socket"); 218 219 len = sizeof(numfibs); 220 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 221 numfibs = -1; 222 223 len = sizeof(defaultfib); 224 if (numfibs != -1 && 225 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 226 0) == -1) 227 defaultfib = -1; 228 229 if (*argv != NULL) 230 switch (keyword(*argv)) { 231 case K_GET: 232 case K_SHOW: 233 uid = 0; 234 /* FALLTHROUGH */ 235 236 case K_CHANGE: 237 case K_ADD: 238 case K_DEL: 239 case K_DELETE: 240 newroute(argc, argv); 241 /* NOTREACHED */ 242 243 case K_MONITOR: 244 monitor(argc, argv); 245 /* NOTREACHED */ 246 247 case K_FLUSH: 248 flushroutes(argc, argv); 249 exit(0); 250 /* NOTREACHED */ 251 } 252 usage(*argv); 253 /* NOTREACHED */ 254 } 255 256 static int 257 set_sofib(int fib) 258 { 259 260 if (fib < 0) 261 return (0); 262 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 263 sizeof(fib))); 264 } 265 266 static int 267 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 268 { 269 struct fibl *fl; 270 char *str0, *str, *token, *endptr; 271 int fib[2], i, error; 272 273 str0 = str = strdup(arg); 274 error = 0; 275 i = 0; 276 while ((token = strsep(&str, "-")) != NULL) { 277 switch (i) { 278 case 0: 279 case 1: 280 errno = 0; 281 fib[i] = strtol(token, &endptr, 0); 282 if (errno == 0) { 283 if (*endptr != '\0' || 284 fib[i] < 0 || 285 (numfibs != -1 && fib[i] > numfibs - 1)) 286 errno = EINVAL; 287 } 288 if (errno) 289 error = 1; 290 break; 291 default: 292 error = 1; 293 } 294 if (error) 295 goto fiboptlist_range_ret; 296 i++; 297 } 298 if (fib[0] >= fib[1]) { 299 error = 1; 300 goto fiboptlist_range_ret; 301 } 302 for (i = fib[0]; i <= fib[1]; i++) { 303 fl = calloc(1, sizeof(*fl)); 304 if (fl == NULL) { 305 error = 1; 306 goto fiboptlist_range_ret; 307 } 308 fl->fl_num = i; 309 TAILQ_INSERT_TAIL(flh, fl, fl_next); 310 } 311 fiboptlist_range_ret: 312 free(str0); 313 return (error); 314 } 315 316 #define ALLSTRLEN 64 317 static int 318 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 319 { 320 struct fibl *fl; 321 char *str0, *str, *token, *endptr; 322 int fib, error; 323 324 str0 = str = NULL; 325 if (strcmp("all", arg) == 0) { 326 str = calloc(1, ALLSTRLEN); 327 if (str == NULL) { 328 error = 1; 329 goto fiboptlist_csv_ret; 330 } 331 if (numfibs > 1) 332 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 333 else 334 snprintf(str, ALLSTRLEN - 1, "%d", 0); 335 } else if (strcmp("default", arg) == 0) { 336 str0 = str = calloc(1, ALLSTRLEN); 337 if (str == NULL) { 338 error = 1; 339 goto fiboptlist_csv_ret; 340 } 341 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 342 } else 343 str0 = str = strdup(arg); 344 345 error = 0; 346 while ((token = strsep(&str, ",")) != NULL) { 347 if (*token != '-' && strchr(token, '-') != NULL) { 348 error = fiboptlist_range(token, flh); 349 if (error) 350 goto fiboptlist_csv_ret; 351 } else { 352 errno = 0; 353 fib = strtol(token, &endptr, 0); 354 if (errno == 0) { 355 if (*endptr != '\0' || 356 fib < 0 || 357 (numfibs != -1 && fib > numfibs - 1)) 358 errno = EINVAL; 359 } 360 if (errno) { 361 error = 1; 362 goto fiboptlist_csv_ret; 363 } 364 fl = calloc(1, sizeof(*fl)); 365 if (fl == NULL) { 366 error = 1; 367 goto fiboptlist_csv_ret; 368 } 369 fl->fl_num = fib; 370 TAILQ_INSERT_TAIL(flh, fl, fl_next); 371 } 372 } 373 fiboptlist_csv_ret: 374 if (str0 != NULL) 375 free(str0); 376 return (error); 377 } 378 379 /* 380 * Purge all entries in the routing tables not 381 * associated with network interfaces. 382 */ 383 static void 384 flushroutes(int argc, char *argv[]) 385 { 386 struct fibl *fl; 387 int error; 388 389 if (uid != 0 && !debugonly && !tflag) 390 errx(EX_NOPERM, "must be root to alter routing table"); 391 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 392 393 TAILQ_INIT(&fibl_head); 394 while (argc > 1) { 395 argc--; 396 argv++; 397 if (**argv != '-') 398 usage(*argv); 399 switch (keyword(*argv + 1)) { 400 #ifdef INET 401 case K_4: 402 case K_INET: 403 af = AF_INET; 404 break; 405 #endif 406 #ifdef INET6 407 case K_6: 408 case K_INET6: 409 af = AF_INET6; 410 break; 411 #endif 412 case K_ATALK: 413 af = AF_APPLETALK; 414 break; 415 case K_LINK: 416 af = AF_LINK; 417 break; 418 case K_FIB: 419 if (!--argc) 420 usage(*argv); 421 error = fiboptlist_csv(*++argv, &fibl_head); 422 if (error) 423 errx(EX_USAGE, "invalid fib number: %s", *argv); 424 break; 425 default: 426 usage(*argv); 427 } 428 } 429 if (TAILQ_EMPTY(&fibl_head)) { 430 error = fiboptlist_csv("default", &fibl_head); 431 if (error) 432 errx(EX_OSERR, "fiboptlist_csv failed."); 433 } 434 TAILQ_FOREACH(fl, &fibl_head, fl_next) 435 flushroutes_fib(fl->fl_num); 436 } 437 438 static int 439 flushroutes_fib(int fib) 440 { 441 struct rt_msghdr *rtm; 442 size_t needed; 443 char *buf, *next, *lim; 444 int mib[7], rlen, seqno, count = 0; 445 int error; 446 447 error = set_sofib(fib); 448 if (error) { 449 warn("fib number %d is ignored", fib); 450 return (error); 451 } 452 453 retry: 454 mib[0] = CTL_NET; 455 mib[1] = PF_ROUTE; 456 mib[2] = 0; /* protocol */ 457 mib[3] = AF_UNSPEC; 458 mib[4] = NET_RT_DUMP; 459 mib[5] = 0; /* no flags */ 460 mib[6] = fib; 461 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 462 err(EX_OSERR, "route-sysctl-estimate"); 463 if ((buf = malloc(needed)) == NULL) 464 errx(EX_OSERR, "malloc failed"); 465 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 466 if (errno == ENOMEM && count++ < 10) { 467 warnx("Routing table grew, retrying"); 468 sleep(1); 469 free(buf); 470 goto retry; 471 } 472 err(EX_OSERR, "route-sysctl-get"); 473 } 474 lim = buf + needed; 475 if (verbose) 476 (void)printf("Examining routing table from sysctl\n"); 477 seqno = 0; /* ??? */ 478 for (next = buf; next < lim; next += rtm->rtm_msglen) { 479 rtm = (struct rt_msghdr *)(void *)next; 480 if (verbose) 481 print_rtmsg(rtm, rtm->rtm_msglen); 482 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 483 continue; 484 if (af != 0) { 485 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 486 487 if (sa->sa_family != af) 488 continue; 489 } 490 if (debugonly) 491 continue; 492 rtm->rtm_type = RTM_DELETE; 493 rtm->rtm_seq = seqno; 494 rlen = write(s, next, rtm->rtm_msglen); 495 if (rlen < 0 && errno == EPERM) 496 err(1, "write to routing socket"); 497 if (rlen < (int)rtm->rtm_msglen) { 498 warn("write to routing socket"); 499 (void)printf("got only %d for rlen\n", rlen); 500 free(buf); 501 goto retry; 502 break; 503 } 504 seqno++; 505 if (qflag) 506 continue; 507 if (verbose) 508 print_rtmsg(rtm, rlen); 509 else { 510 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 511 512 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 513 routename(sa) : netname(sa)); 514 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 515 printf("%-20.20s ", routename(sa)); 516 if (fib >= 0) 517 printf("-fib %-3d ", fib); 518 printf("done\n"); 519 } 520 } 521 return (error); 522 } 523 524 static const char * 525 routename(struct sockaddr *sa) 526 { 527 struct sockaddr_dl *sdl; 528 const char *cp; 529 char atalk_buf[ATALK_BUF_SIZE]; 530 int n; 531 532 if (!domain_initialized) { 533 domain_initialized = true; 534 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 535 (cp = strchr(domain, '.'))) { 536 domain[MAXHOSTNAMELEN] = '\0'; 537 (void)strcpy(domain, cp + 1); 538 } else 539 domain[0] = '\0'; 540 } 541 542 /* If the address is zero-filled, use "default". */ 543 if (sa->sa_len == 0 && nflag == 0) 544 return ("default"); 545 #if defined(INET) || defined(INET6) 546 switch (sa->sa_family) { 547 #ifdef INET 548 case AF_INET: 549 /* If the address is zero-filled, use "default". */ 550 if (nflag == 0 && 551 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 552 INADDR_ANY) 553 return("default"); 554 break; 555 #endif 556 #ifdef INET6 557 case AF_INET6: 558 /* If the address is zero-filled, use "default". */ 559 if (nflag == 0 && 560 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 561 return("default"); 562 break; 563 #endif 564 } 565 #endif 566 567 switch (sa->sa_family) { 568 #if defined(INET) || defined(INET6) 569 #ifdef INET 570 case AF_INET: 571 #endif 572 #ifdef INET6 573 case AF_INET6: 574 #endif 575 { 576 struct sockaddr_storage ss; 577 int error; 578 char *p; 579 580 memset(&ss, 0, sizeof(ss)); 581 if (sa->sa_len == 0) 582 ss.ss_family = sa->sa_family; 583 else 584 memcpy(&ss, sa, sa->sa_len); 585 /* Expand sa->sa_len because it could be shortened. */ 586 if (sa->sa_family == AF_INET) 587 ss.ss_len = sizeof(struct sockaddr_in); 588 else if (sa->sa_family == AF_INET6) 589 ss.ss_len = sizeof(struct sockaddr_in6); 590 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 591 rt_line, sizeof(rt_line), NULL, 0, 592 (nflag == 0) ? 0 : NI_NUMERICHOST); 593 if (error) { 594 warnx("getnameinfo(): %s", gai_strerror(error)); 595 strncpy(rt_line, "invalid", sizeof(rt_line)); 596 } 597 598 /* Remove the domain part if any. */ 599 p = strchr(rt_line, '.'); 600 if (p != NULL && strcmp(p + 1, domain) == 0) 601 *p = '\0'; 602 603 return (rt_line); 604 break; 605 } 606 #endif 607 case AF_APPLETALK: 608 (void)snprintf(rt_line, sizeof(rt_line), "atalk %s", 609 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr, 610 atalk_buf)); 611 break; 612 613 case AF_LINK: 614 sdl = (struct sockaddr_dl *)(void *)sa; 615 616 if (sdl->sdl_nlen == 0 && 617 sdl->sdl_alen == 0 && 618 sdl->sdl_slen == 0) { 619 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 620 sdl->sdl_index); 621 if (n > (int)sizeof(rt_line)) 622 rt_line[0] = '\0'; 623 return (rt_line); 624 } else 625 return (link_ntoa(sdl)); 626 break; 627 628 default: 629 { 630 u_short *sp = (u_short *)(void *)sa; 631 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 632 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 633 char *cpe = rt_line + sizeof(rt_line); 634 635 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 636 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 637 cps += n; 638 else 639 *cps = '\0'; 640 break; 641 } 642 } 643 return (rt_line); 644 } 645 646 /* 647 * Return the name of the network whose address is given. 648 * The address is assumed to be that of a net, not a host. 649 */ 650 static const char * 651 netname(struct sockaddr *sa) 652 { 653 struct sockaddr_dl *sdl; 654 char atalk_buf[ATALK_BUF_SIZE]; 655 int n; 656 #ifdef INET 657 struct netent *np = NULL; 658 const char *cp = NULL; 659 u_long i; 660 #endif 661 662 switch (sa->sa_family) { 663 #ifdef INET 664 case AF_INET: 665 { 666 struct in_addr in; 667 668 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 669 i = in.s_addr = ntohl(in.s_addr); 670 if (in.s_addr == 0) 671 cp = "default"; 672 else if (!nflag) { 673 np = getnetbyaddr(i, AF_INET); 674 if (np != NULL) 675 cp = np->n_name; 676 } 677 #define C(x) (unsigned)((x) & 0xff) 678 if (cp != NULL) 679 strncpy(net_line, cp, sizeof(net_line)); 680 else if ((in.s_addr & 0xffffff) == 0) 681 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 682 else if ((in.s_addr & 0xffff) == 0) 683 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 684 C(in.s_addr >> 16)); 685 else if ((in.s_addr & 0xff) == 0) 686 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 687 C(in.s_addr >> 16), C(in.s_addr >> 8)); 688 else 689 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 690 C(in.s_addr >> 16), C(in.s_addr >> 8), 691 C(in.s_addr)); 692 #undef C 693 break; 694 } 695 #endif 696 #ifdef INET6 697 case AF_INET6: 698 { 699 struct sockaddr_in6 sin6; 700 int niflags = 0; 701 702 memset(&sin6, 0, sizeof(sin6)); 703 memcpy(&sin6, sa, sa->sa_len); 704 sin6.sin6_len = sizeof(sin6); 705 sin6.sin6_family = AF_INET6; 706 if (nflag) 707 niflags |= NI_NUMERICHOST; 708 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 709 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 710 strncpy(net_line, "invalid", sizeof(net_line)); 711 712 return(net_line); 713 } 714 #endif 715 716 case AF_APPLETALK: 717 (void)snprintf(net_line, sizeof(net_line), "atalk %s", 718 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr, 719 atalk_buf)); 720 break; 721 722 case AF_LINK: 723 sdl = (struct sockaddr_dl *)(void *)sa; 724 725 if (sdl->sdl_nlen == 0 && 726 sdl->sdl_alen == 0 && 727 sdl->sdl_slen == 0) { 728 n = snprintf(net_line, sizeof(net_line), "link#%d", 729 sdl->sdl_index); 730 if (n > (int)sizeof(net_line)) 731 net_line[0] = '\0'; 732 return (net_line); 733 } else 734 return (link_ntoa(sdl)); 735 break; 736 737 default: 738 { 739 u_short *sp = (u_short *)(void *)sa->sa_data; 740 u_short *splim = sp + ((sa->sa_len + 1)>>1); 741 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 742 char *cpe = net_line + sizeof(net_line); 743 744 while (sp < splim && cps < cpe) 745 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 746 cps += n; 747 else 748 *cps = '\0'; 749 break; 750 } 751 } 752 return (net_line); 753 } 754 755 static void 756 set_metric(char *value, int key) 757 { 758 int flag = 0; 759 char *endptr; 760 u_long noval, *valp = &noval; 761 762 switch (key) { 763 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 764 caseof(K_MTU, RTV_MTU, rmx_mtu); 765 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 766 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 767 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 768 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 769 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 770 caseof(K_RTT, RTV_RTT, rmx_rtt); 771 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 772 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 773 } 774 rtm_inits |= flag; 775 if (lockrest || locking) 776 rt_metrics.rmx_locks |= flag; 777 if (locking) 778 locking = 0; 779 errno = 0; 780 *valp = strtol(value, &endptr, 0); 781 if (errno == 0 && *endptr != '\0') 782 errno = EINVAL; 783 if (errno) 784 err(EX_USAGE, "%s", value); 785 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 786 struct timespec ts; 787 788 clock_gettime(CLOCK_REALTIME_FAST, &ts); 789 *valp += ts.tv_sec; 790 } 791 } 792 793 #define F_ISHOST 0x01 794 #define F_FORCENET 0x02 795 #define F_FORCEHOST 0x04 796 #define F_PROXY 0x08 797 #define F_INTERFACE 0x10 798 799 static void 800 newroute(int argc, char **argv) 801 { 802 struct hostent *hp; 803 struct fibl *fl; 804 char *cmd; 805 const char *dest, *gateway, *errmsg; 806 int key, error, flags, nrflags, fibnum; 807 808 if (uid != 0 && !debugonly && !tflag) 809 errx(EX_NOPERM, "must be root to alter routing table"); 810 dest = NULL; 811 gateway = NULL; 812 flags = RTF_STATIC; 813 nrflags = 0; 814 hp = NULL; 815 TAILQ_INIT(&fibl_head); 816 817 cmd = argv[0]; 818 if (*cmd != 'g' && *cmd != 's') 819 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 820 while (--argc > 0) { 821 if (**(++argv)== '-') { 822 switch (key = keyword(1 + *argv)) { 823 case K_LINK: 824 af = AF_LINK; 825 aflen = sizeof(struct sockaddr_dl); 826 break; 827 #ifdef INET 828 case K_4: 829 case K_INET: 830 af = AF_INET; 831 aflen = sizeof(struct sockaddr_in); 832 break; 833 #endif 834 #ifdef INET6 835 case K_6: 836 case K_INET6: 837 af = AF_INET6; 838 aflen = sizeof(struct sockaddr_in6); 839 break; 840 #endif 841 case K_ATALK: 842 af = AF_APPLETALK; 843 aflen = sizeof(struct sockaddr_at); 844 break; 845 case K_SA: 846 af = PF_ROUTE; 847 aflen = sizeof(struct sockaddr_storage); 848 break; 849 case K_IFACE: 850 case K_INTERFACE: 851 nrflags |= F_INTERFACE; 852 break; 853 case K_NOSTATIC: 854 flags &= ~RTF_STATIC; 855 break; 856 case K_LOCK: 857 locking = 1; 858 break; 859 case K_LOCKREST: 860 lockrest = 1; 861 break; 862 case K_HOST: 863 nrflags |= F_FORCEHOST; 864 break; 865 case K_REJECT: 866 flags |= RTF_REJECT; 867 break; 868 case K_BLACKHOLE: 869 flags |= RTF_BLACKHOLE; 870 break; 871 case K_PROTO1: 872 flags |= RTF_PROTO1; 873 break; 874 case K_PROTO2: 875 flags |= RTF_PROTO2; 876 break; 877 case K_PROTO3: 878 flags |= RTF_PROTO3; 879 break; 880 case K_PROXY: 881 nrflags |= F_PROXY; 882 break; 883 case K_XRESOLVE: 884 flags |= RTF_XRESOLVE; 885 break; 886 case K_STATIC: 887 flags |= RTF_STATIC; 888 break; 889 case K_STICKY: 890 flags |= RTF_STICKY; 891 break; 892 case K_NOSTICK: 893 flags &= ~RTF_STICKY; 894 break; 895 case K_FIB: 896 if (!--argc) 897 usage(NULL); 898 error = fiboptlist_csv(*++argv, &fibl_head); 899 if (error) 900 errx(EX_USAGE, 901 "invalid fib number: %s", *argv); 902 break; 903 case K_IFA: 904 if (!--argc) 905 usage(NULL); 906 getaddr(RTAX_IFA, *++argv, 0, nrflags); 907 break; 908 case K_IFP: 909 if (!--argc) 910 usage(NULL); 911 getaddr(RTAX_IFP, *++argv, 0, nrflags); 912 break; 913 case K_GENMASK: 914 if (!--argc) 915 usage(NULL); 916 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 917 break; 918 case K_GATEWAY: 919 if (!--argc) 920 usage(NULL); 921 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 922 gateway = *argv; 923 break; 924 case K_DST: 925 if (!--argc) 926 usage(NULL); 927 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 928 nrflags |= F_ISHOST; 929 dest = *argv; 930 break; 931 case K_NETMASK: 932 if (!--argc) 933 usage(NULL); 934 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 935 /* FALLTHROUGH */ 936 case K_NET: 937 nrflags |= F_FORCENET; 938 break; 939 case K_PREFIXLEN: 940 if (!--argc) 941 usage(NULL); 942 if (prefixlen(*++argv) == -1) { 943 nrflags &= ~F_FORCENET; 944 nrflags |= F_ISHOST; 945 } else { 946 nrflags |= F_FORCENET; 947 nrflags &= ~F_ISHOST; 948 } 949 break; 950 case K_MTU: 951 case K_HOPCOUNT: 952 case K_EXPIRE: 953 case K_RECVPIPE: 954 case K_SENDPIPE: 955 case K_SSTHRESH: 956 case K_RTT: 957 case K_RTTVAR: 958 case K_WEIGHT: 959 if (!--argc) 960 usage(NULL); 961 set_metric(*++argv, key); 962 break; 963 default: 964 usage(1+*argv); 965 } 966 } else { 967 if ((rtm_addrs & RTA_DST) == 0) { 968 dest = *argv; 969 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 970 nrflags |= F_ISHOST; 971 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 972 gateway = *argv; 973 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 974 } else { 975 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 976 nrflags |= F_FORCENET; 977 } 978 } 979 } 980 981 /* Do some sanity checks on resulting request */ 982 if (so[RTAX_DST].ss_len == 0) { 983 warnx("destination parameter required"); 984 usage(NULL); 985 } 986 987 if (so[RTAX_NETMASK].ss_len != 0 && 988 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 989 warnx("destination and netmask family need to be the same"); 990 usage(NULL); 991 } 992 993 if (nrflags & F_FORCEHOST) { 994 nrflags |= F_ISHOST; 995 #ifdef INET6 996 if (af == AF_INET6) { 997 rtm_addrs &= ~RTA_NETMASK; 998 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 999 } 1000 #endif 1001 } 1002 if (nrflags & F_FORCENET) 1003 nrflags &= ~F_ISHOST; 1004 flags |= RTF_UP; 1005 if (nrflags & F_ISHOST) 1006 flags |= RTF_HOST; 1007 if ((nrflags & F_INTERFACE) == 0) 1008 flags |= RTF_GATEWAY; 1009 if (nrflags & F_PROXY) 1010 flags |= RTF_ANNOUNCE; 1011 if (dest == NULL) 1012 dest = ""; 1013 if (gateway == NULL) 1014 gateway = ""; 1015 1016 if (TAILQ_EMPTY(&fibl_head)) { 1017 error = fiboptlist_csv("default", &fibl_head); 1018 if (error) 1019 errx(EX_OSERR, "fiboptlist_csv failed."); 1020 } 1021 error = 0; 1022 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1023 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1024 if (fl->fl_error) 1025 fl->fl_errno = errno; 1026 error += fl->fl_error; 1027 } 1028 if (*cmd == 'g' || *cmd == 's') 1029 exit(error); 1030 1031 error = 0; 1032 if (!qflag) { 1033 fibnum = 0; 1034 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1035 if (fl->fl_error == 0) 1036 fibnum++; 1037 } 1038 if (fibnum > 0) { 1039 int firstfib = 1; 1040 1041 printf("%s %s %s", cmd, 1042 (nrflags & F_ISHOST) ? "host" : "net", dest); 1043 if (*gateway) 1044 printf(": gateway %s", gateway); 1045 1046 if (numfibs > 1) { 1047 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1048 if (fl->fl_error == 0 1049 && fl->fl_num >= 0) { 1050 if (firstfib) { 1051 printf(" fib "); 1052 firstfib = 0; 1053 } 1054 printf("%d", fl->fl_num); 1055 if (fibnum-- > 1) 1056 printf(","); 1057 } 1058 } 1059 } 1060 printf("\n"); 1061 } 1062 1063 fibnum = 0; 1064 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1065 if (fl->fl_error != 0) { 1066 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1067 ? "host" : "net", dest); 1068 if (*gateway) 1069 printf(": gateway %s", gateway); 1070 1071 if (fl->fl_num >= 0) 1072 printf(" fib %d", fl->fl_num); 1073 1074 switch (fl->fl_errno) { 1075 case ESRCH: 1076 errmsg = "not in table"; 1077 break; 1078 case EBUSY: 1079 errmsg = "entry in use"; 1080 break; 1081 case ENOBUFS: 1082 errmsg = "not enough memory"; 1083 break; 1084 case EADDRINUSE: 1085 /* 1086 * handle recursion avoidance 1087 * in rt_setgate() 1088 */ 1089 errmsg = "gateway uses the same route"; 1090 break; 1091 case EEXIST: 1092 errmsg = "route already in table"; 1093 break; 1094 default: 1095 errmsg = strerror(fl->fl_errno); 1096 break; 1097 } 1098 printf(": %s\n", errmsg); 1099 error = 1; 1100 } 1101 } 1102 } 1103 exit(error); 1104 } 1105 1106 static int 1107 newroute_fib(int fib, char *cmd, int flags) 1108 { 1109 int error; 1110 1111 error = set_sofib(fib); 1112 if (error) { 1113 warn("fib number %d is ignored", fib); 1114 return (error); 1115 } 1116 1117 error = rtmsg(*cmd, flags, fib); 1118 return (error); 1119 } 1120 1121 #ifdef INET 1122 static void 1123 inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1124 struct sockaddr_in *sin_mask, u_long bits) 1125 { 1126 u_long mask = 0; 1127 1128 rtm_addrs |= RTA_NETMASK; 1129 1130 /* 1131 * MSB of net should be meaningful. 0/0 is exception. 1132 */ 1133 if (net > 0) 1134 while ((net & 0xff000000) == 0) 1135 net <<= 8; 1136 1137 /* 1138 * If no /xx was specified we must calculate the 1139 * CIDR address. 1140 */ 1141 if ((bits == 0) && (net != 0)) { 1142 u_long i, j; 1143 1144 for(i = 0, j = 0xff; i < 4; i++) { 1145 if (net & j) { 1146 break; 1147 } 1148 j <<= 8; 1149 } 1150 /* i holds the first non zero bit */ 1151 bits = 32 - (i*8); 1152 } 1153 if (bits != 0) 1154 mask = 0xffffffff << (32 - bits); 1155 1156 sin->sin_addr.s_addr = htonl(net); 1157 sin_mask->sin_addr.s_addr = htonl(mask); 1158 sin_mask->sin_len = sizeof(struct sockaddr_in); 1159 sin_mask->sin_family = AF_INET; 1160 } 1161 #endif 1162 1163 #ifdef INET6 1164 /* 1165 * XXX the function may need more improvement... 1166 */ 1167 static int 1168 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1169 { 1170 struct in6_addr in6; 1171 1172 if (plen == NULL) { 1173 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1174 sin6->sin6_scope_id == 0) { 1175 plen = "0"; 1176 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1177 /* aggregatable global unicast - RFC2374 */ 1178 memset(&in6, 0, sizeof(in6)); 1179 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1180 &in6.s6_addr[8], 8)) 1181 plen = "64"; 1182 } 1183 } 1184 1185 if (plen == NULL || strcmp(plen, "128") == 0) 1186 return (1); 1187 rtm_addrs |= RTA_NETMASK; 1188 prefixlen(plen); 1189 return (0); 1190 } 1191 #endif 1192 1193 /* 1194 * Interpret an argument as a network address of some kind, 1195 * returning 1 if a host address, 0 if a network address. 1196 */ 1197 static int 1198 getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1199 { 1200 struct sockaddr *sa; 1201 #if defined(INET) 1202 struct sockaddr_in *sin; 1203 struct hostent *hp; 1204 struct netent *np; 1205 u_long val; 1206 char *q; 1207 #elif defined(INET6) 1208 char *q; 1209 #endif 1210 1211 if (idx < 0 || idx >= RTAX_MAX) 1212 usage("internal error"); 1213 if (af == 0) { 1214 #if defined(INET) 1215 af = AF_INET; 1216 aflen = sizeof(struct sockaddr_in); 1217 #elif defined(INET6) 1218 af = AF_INET6; 1219 aflen = sizeof(struct sockaddr_in6); 1220 #else 1221 af = AF_LINK; 1222 aflen = sizeof(struct sockaddr_dl); 1223 #endif 1224 } 1225 #ifndef INET 1226 hpp = NULL; 1227 #endif 1228 rtm_addrs |= (1 << idx); 1229 sa = (struct sockaddr *)&so[idx]; 1230 sa->sa_family = af; 1231 sa->sa_len = aflen; 1232 1233 switch (idx) { 1234 case RTAX_GATEWAY: 1235 if (nrflags & F_INTERFACE) { 1236 struct ifaddrs *ifap, *ifa; 1237 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1238 struct sockaddr_dl *sdl = NULL; 1239 1240 if (getifaddrs(&ifap)) 1241 err(EX_OSERR, "getifaddrs"); 1242 1243 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1244 if (ifa->ifa_addr->sa_family != AF_LINK) 1245 continue; 1246 1247 if (strcmp(str, ifa->ifa_name) != 0) 1248 continue; 1249 1250 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1251 } 1252 /* If we found it, then use it */ 1253 if (sdl != NULL) { 1254 /* 1255 * Note that we need to copy before calling 1256 * freeifaddrs(). 1257 */ 1258 memcpy(sdl0, sdl, sdl->sdl_len); 1259 } 1260 freeifaddrs(ifap); 1261 if (sdl != NULL) 1262 return(1); 1263 } 1264 break; 1265 case RTAX_IFP: 1266 sa->sa_family = AF_LINK; 1267 break; 1268 } 1269 if (strcmp(str, "default") == 0) { 1270 /* 1271 * Default is net 0.0.0.0/0 1272 */ 1273 switch (idx) { 1274 case RTAX_DST: 1275 forcenet++; 1276 getaddr(RTAX_NETMASK, str, 0, nrflags); 1277 break; 1278 } 1279 return (0); 1280 } 1281 switch (sa->sa_family) { 1282 #ifdef INET6 1283 case AF_INET6: 1284 { 1285 struct addrinfo hints, *res; 1286 int ecode; 1287 1288 q = NULL; 1289 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1290 *q = '\0'; 1291 memset(&hints, 0, sizeof(hints)); 1292 hints.ai_family = sa->sa_family; 1293 hints.ai_socktype = SOCK_DGRAM; 1294 ecode = getaddrinfo(str, NULL, &hints, &res); 1295 if (ecode != 0 || res->ai_family != AF_INET6 || 1296 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1297 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1298 memcpy(sa, res->ai_addr, res->ai_addrlen); 1299 freeaddrinfo(res); 1300 if (q != NULL) 1301 *q++ = '/'; 1302 if (idx == RTAX_DST) 1303 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1304 return (0); 1305 } 1306 #endif /* INET6 */ 1307 1308 case AF_APPLETALK: 1309 { 1310 struct sockaddr_at *sat = (struct sockaddr_at *)(void *)sa; 1311 1312 if (!atalk_aton(str, &sat->sat_addr)) 1313 errx(EX_NOHOST, "bad address: %s", str); 1314 rtm_addrs |= RTA_NETMASK; 1315 return(forcehost || sat->sat_addr.s_node != 0); 1316 } 1317 case AF_LINK: 1318 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1319 return (1); 1320 1321 case PF_ROUTE: 1322 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1323 return (1); 1324 #ifdef INET 1325 case AF_INET: 1326 #endif 1327 default: 1328 break; 1329 } 1330 1331 #ifdef INET 1332 sin = (struct sockaddr_in *)(void *)sa; 1333 if (hpp == NULL) 1334 hpp = &hp; 1335 *hpp = NULL; 1336 1337 q = strchr(str,'/'); 1338 if (q != NULL && idx == RTAX_DST) { 1339 *q = '\0'; 1340 if ((val = inet_network(str)) != INADDR_NONE) { 1341 inet_makenetandmask(val, sin, 1342 (struct sockaddr_in *)&so[RTAX_NETMASK], 1343 strtoul(q+1, 0, 0)); 1344 return (0); 1345 } 1346 *q = '/'; 1347 } 1348 if ((idx != RTAX_DST || forcenet == 0) && 1349 inet_aton(str, &sin->sin_addr)) { 1350 val = sin->sin_addr.s_addr; 1351 if (idx != RTAX_DST || forcehost || 1352 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1353 return (1); 1354 else { 1355 val = ntohl(val); 1356 goto netdone; 1357 } 1358 } 1359 if (idx == RTAX_DST && forcehost == 0 && 1360 ((val = inet_network(str)) != INADDR_NONE || 1361 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1362 netdone: 1363 inet_makenetandmask(val, sin, 1364 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1365 return (0); 1366 } 1367 hp = gethostbyname(str); 1368 if (hp != NULL) { 1369 *hpp = hp; 1370 sin->sin_family = hp->h_addrtype; 1371 memmove((char *)&sin->sin_addr, hp->h_addr, 1372 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1373 return (1); 1374 } 1375 #endif 1376 errx(EX_NOHOST, "bad address: %s", str); 1377 } 1378 1379 static int 1380 prefixlen(const char *str) 1381 { 1382 int len = atoi(str), q, r; 1383 int max; 1384 char *p; 1385 1386 rtm_addrs |= RTA_NETMASK; 1387 switch (af) { 1388 #ifdef INET6 1389 case AF_INET6: 1390 { 1391 struct sockaddr_in6 *sin6 = 1392 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1393 1394 max = 128; 1395 p = (char *)&sin6->sin6_addr; 1396 sin6->sin6_family = AF_INET6; 1397 sin6->sin6_len = sizeof(*sin6); 1398 break; 1399 } 1400 #endif 1401 #ifdef INET 1402 case AF_INET: 1403 { 1404 struct sockaddr_in *sin = 1405 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1406 1407 max = 32; 1408 p = (char *)&sin->sin_addr; 1409 sin->sin_family = AF_INET; 1410 sin->sin_len = sizeof(*sin); 1411 break; 1412 } 1413 #endif 1414 default: 1415 errx(EX_OSERR, "prefixlen not supported in this af"); 1416 } 1417 1418 if (len < 0 || max < len) 1419 errx(EX_USAGE, "%s: invalid prefixlen", str); 1420 1421 q = len >> 3; 1422 r = len & 7; 1423 memset((void *)p, 0, max / 8); 1424 if (q > 0) 1425 memset((void *)p, 0xff, q); 1426 if (r > 0) 1427 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1428 if (len == max) 1429 return (-1); 1430 else 1431 return (len); 1432 } 1433 1434 static void 1435 interfaces(void) 1436 { 1437 size_t needed; 1438 int mib[6]; 1439 char *buf, *lim, *next, count = 0; 1440 struct rt_msghdr *rtm; 1441 1442 retry2: 1443 mib[0] = CTL_NET; 1444 mib[1] = PF_ROUTE; 1445 mib[2] = 0; /* protocol */ 1446 mib[3] = AF_UNSPEC; 1447 mib[4] = NET_RT_IFLIST; 1448 mib[5] = 0; /* no flags */ 1449 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1450 err(EX_OSERR, "route-sysctl-estimate"); 1451 if ((buf = malloc(needed)) == NULL) 1452 errx(EX_OSERR, "malloc failed"); 1453 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1454 if (errno == ENOMEM && count++ < 10) { 1455 warnx("Routing table grew, retrying"); 1456 sleep(1); 1457 free(buf); 1458 goto retry2; 1459 } 1460 err(EX_OSERR, "actual retrieval of interface table"); 1461 } 1462 lim = buf + needed; 1463 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1464 rtm = (struct rt_msghdr *)(void *)next; 1465 print_rtmsg(rtm, rtm->rtm_msglen); 1466 } 1467 } 1468 1469 static void 1470 monitor(int argc, char *argv[]) 1471 { 1472 int n, fib, error; 1473 char msg[2048], *endptr; 1474 1475 fib = defaultfib; 1476 while (argc > 1) { 1477 argc--; 1478 argv++; 1479 if (**argv != '-') 1480 usage(*argv); 1481 switch (keyword(*argv + 1)) { 1482 case K_FIB: 1483 if (!--argc) 1484 usage(*argv); 1485 errno = 0; 1486 fib = strtol(*++argv, &endptr, 0); 1487 if (errno == 0) { 1488 if (*endptr != '\0' || 1489 fib < 0 || 1490 (numfibs != -1 && fib > numfibs - 1)) 1491 errno = EINVAL; 1492 } 1493 if (errno) 1494 errx(EX_USAGE, "invalid fib number: %s", *argv); 1495 break; 1496 default: 1497 usage(*argv); 1498 } 1499 } 1500 error = set_sofib(fib); 1501 if (error) 1502 errx(EX_USAGE, "invalid fib number: %d", fib); 1503 1504 verbose = 1; 1505 if (debugonly) { 1506 interfaces(); 1507 exit(0); 1508 } 1509 for (;;) { 1510 time_t now; 1511 n = read(s, msg, 2048); 1512 now = time(NULL); 1513 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1514 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1515 } 1516 } 1517 1518 static int 1519 rtmsg(int cmd, int flags, int fib) 1520 { 1521 int rlen; 1522 char *cp = m_rtmsg.m_space; 1523 int l; 1524 1525 #define NEXTADDR(w, u) \ 1526 if (rtm_addrs & (w)) { \ 1527 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1528 sizeof(long) : \ 1529 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1530 | (sizeof(long) - 1)); \ 1531 memmove(cp, (char *)&(u), l); \ 1532 cp += l; \ 1533 if (verbose) \ 1534 sodump((struct sockaddr *)&(u), #w); \ 1535 } 1536 1537 errno = 0; 1538 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1539 if (cmd == 'a') 1540 cmd = RTM_ADD; 1541 else if (cmd == 'c') 1542 cmd = RTM_CHANGE; 1543 else if (cmd == 'g' || cmd == 's') { 1544 cmd = RTM_GET; 1545 if (so[RTAX_IFP].ss_family == 0) { 1546 so[RTAX_IFP].ss_family = AF_LINK; 1547 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1548 rtm_addrs |= RTA_IFP; 1549 } 1550 } else 1551 cmd = RTM_DELETE; 1552 #define rtm m_rtmsg.m_rtm 1553 rtm.rtm_type = cmd; 1554 rtm.rtm_flags = flags; 1555 rtm.rtm_version = RTM_VERSION; 1556 rtm.rtm_seq = ++rtm_seq; 1557 rtm.rtm_addrs = rtm_addrs; 1558 rtm.rtm_rmx = rt_metrics; 1559 rtm.rtm_inits = rtm_inits; 1560 1561 NEXTADDR(RTA_DST, so[RTAX_DST]); 1562 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1563 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1564 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1565 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1566 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1567 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1568 if (verbose) 1569 print_rtmsg(&rtm, l); 1570 if (debugonly) 1571 return (0); 1572 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1573 if (errno == EPERM) 1574 err(1, "writing to routing socket"); 1575 warn("writing to routing socket"); 1576 return (-1); 1577 } 1578 if (cmd == RTM_GET) { 1579 do { 1580 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1581 } while (l > 0 && (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid)); 1582 if (l < 0) 1583 warn("read from routing socket"); 1584 else 1585 print_getmsg(&rtm, l, fib); 1586 } 1587 #undef rtm 1588 return (0); 1589 } 1590 1591 static const char *const msgtypes[] = { 1592 "", 1593 "RTM_ADD: Add Route", 1594 "RTM_DELETE: Delete Route", 1595 "RTM_CHANGE: Change Metrics or flags", 1596 "RTM_GET: Report Metrics", 1597 "RTM_LOSING: Kernel Suspects Partitioning", 1598 "RTM_REDIRECT: Told to use different route", 1599 "RTM_MISS: Lookup failed on this address", 1600 "RTM_LOCK: fix specified metrics", 1601 "RTM_OLDADD: caused by SIOCADDRT", 1602 "RTM_OLDDEL: caused by SIOCDELRT", 1603 "RTM_RESOLVE: Route created by cloning", 1604 "RTM_NEWADDR: address being added to iface", 1605 "RTM_DELADDR: address being removed from iface", 1606 "RTM_IFINFO: iface status change", 1607 "RTM_NEWMADDR: new multicast group membership on iface", 1608 "RTM_DELMADDR: multicast group membership removed from iface", 1609 "RTM_IFANNOUNCE: interface arrival/departure", 1610 "RTM_IEEE80211: IEEE 802.11 wireless event", 1611 }; 1612 1613 static const char metricnames[] = 1614 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1615 "\1mtu"; 1616 static const char routeflags[] = 1617 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1618 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1619 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1620 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1621 static const char ifnetflags[] = 1622 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1623 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1624 "\017LINK2\020MULTICAST"; 1625 static const char addrnames[] = 1626 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1627 1628 static const char errfmt[] = 1629 "\n%s: truncated route message, only %zu bytes left\n"; 1630 1631 static void 1632 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1633 { 1634 struct if_msghdr *ifm; 1635 struct ifa_msghdr *ifam; 1636 #ifdef RTM_NEWMADDR 1637 struct ifma_msghdr *ifmam; 1638 #endif 1639 struct if_announcemsghdr *ifan; 1640 const char *state; 1641 1642 if (verbose == 0) 1643 return; 1644 if (rtm->rtm_version != RTM_VERSION) { 1645 (void)printf("routing message version %d not understood\n", 1646 rtm->rtm_version); 1647 return; 1648 } 1649 if (rtm->rtm_type < nitems(msgtypes)) 1650 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1651 else 1652 (void)printf("unknown type %d: ", rtm->rtm_type); 1653 (void)printf("len %d, ", rtm->rtm_msglen); 1654 1655 #define REQUIRE(x) do { \ 1656 if (msglen < sizeof(x)) \ 1657 goto badlen; \ 1658 else \ 1659 msglen -= sizeof(x); \ 1660 } while (0) 1661 1662 switch (rtm->rtm_type) { 1663 case RTM_IFINFO: 1664 REQUIRE(struct if_msghdr); 1665 ifm = (struct if_msghdr *)rtm; 1666 (void)printf("if# %d, ", ifm->ifm_index); 1667 switch (ifm->ifm_data.ifi_link_state) { 1668 case LINK_STATE_DOWN: 1669 state = "down"; 1670 break; 1671 case LINK_STATE_UP: 1672 state = "up"; 1673 break; 1674 default: 1675 state = "unknown"; 1676 break; 1677 } 1678 (void)printf("link: %s, flags:", state); 1679 printb(ifm->ifm_flags, ifnetflags); 1680 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1681 break; 1682 case RTM_NEWADDR: 1683 case RTM_DELADDR: 1684 REQUIRE(struct ifa_msghdr); 1685 ifam = (struct ifa_msghdr *)rtm; 1686 (void)printf("metric %d, flags:", ifam->ifam_metric); 1687 printb(ifam->ifam_flags, routeflags); 1688 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1689 break; 1690 #ifdef RTM_NEWMADDR 1691 case RTM_NEWMADDR: 1692 case RTM_DELMADDR: 1693 REQUIRE(struct ifma_msghdr); 1694 ifmam = (struct ifma_msghdr *)rtm; 1695 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1696 break; 1697 #endif 1698 case RTM_IFANNOUNCE: 1699 REQUIRE(struct if_announcemsghdr); 1700 ifan = (struct if_announcemsghdr *)rtm; 1701 (void)printf("if# %d, what: ", ifan->ifan_index); 1702 switch (ifan->ifan_what) { 1703 case IFAN_ARRIVAL: 1704 (void)printf("arrival"); 1705 break; 1706 case IFAN_DEPARTURE: 1707 printf("departure"); 1708 break; 1709 default: 1710 printf("#%d", ifan->ifan_what); 1711 break; 1712 } 1713 printf("\n"); 1714 fflush(stdout); 1715 break; 1716 1717 default: 1718 printf("pid: %ld, seq %d, errno %d, flags:", 1719 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1720 printb(rtm->rtm_flags, routeflags); 1721 pmsg_common(rtm, msglen); 1722 } 1723 1724 return; 1725 1726 badlen: 1727 (void)printf(errfmt, __func__, msglen); 1728 #undef REQUIRE 1729 } 1730 1731 static void 1732 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1733 { 1734 struct sockaddr *sp[RTAX_MAX]; 1735 struct timespec ts; 1736 char *cp; 1737 int i; 1738 1739 memset(sp, 0, sizeof(sp)); 1740 (void)printf(" route to: %s\n", 1741 routename((struct sockaddr *)&so[RTAX_DST])); 1742 if (rtm->rtm_version != RTM_VERSION) { 1743 warnx("routing message version %d not understood", 1744 rtm->rtm_version); 1745 return; 1746 } 1747 if (rtm->rtm_msglen > msglen) { 1748 warnx("message length mismatch, in packet %d, returned %d", 1749 rtm->rtm_msglen, msglen); 1750 return; 1751 } 1752 if (rtm->rtm_errno) { 1753 errno = rtm->rtm_errno; 1754 warn("message indicates error %d", errno); 1755 return; 1756 } 1757 cp = ((char *)(rtm + 1)); 1758 for (i = 0; i < RTAX_MAX; i++) 1759 if (rtm->rtm_addrs & (1 << i)) { 1760 sp[i] = (struct sockaddr *)cp; 1761 cp += SA_SIZE((struct sockaddr *)cp); 1762 } 1763 if ((rtm->rtm_addrs & RTA_IFP) && 1764 (sp[RTAX_IFP]->sa_family != AF_LINK || 1765 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1766 sp[RTAX_IFP] = NULL; 1767 if (sp[RTAX_DST] && sp[RTAX_NETMASK]) 1768 sp[RTAX_NETMASK]->sa_family = sp[RTAX_DST]->sa_family; /* XXX */ 1769 if (sp[RTAX_DST]) 1770 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1771 if (sp[RTAX_NETMASK]) 1772 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1773 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1774 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1775 if (fib >= 0) 1776 (void)printf(" fib: %u\n", (unsigned int)fib); 1777 if (sp[RTAX_IFP]) 1778 (void)printf(" interface: %.*s\n", 1779 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1780 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1781 (void)printf(" flags: "); 1782 printb(rtm->rtm_flags, routeflags); 1783 1784 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1785 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1786 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1787 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1788 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1789 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1790 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1791 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1792 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1793 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1794 if (rtm->rtm_rmx.rmx_expire > 0) 1795 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1796 else 1797 ts.tv_sec = 0; 1798 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1799 lock(EXPIRE)); 1800 #undef lock 1801 #undef msec 1802 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1803 if (verbose) 1804 pmsg_common(rtm, msglen); 1805 else if (rtm->rtm_addrs &~ RTA_IGN) { 1806 (void)printf("sockaddrs: "); 1807 printb(rtm->rtm_addrs, addrnames); 1808 putchar('\n'); 1809 } 1810 #undef RTA_IGN 1811 } 1812 1813 static void 1814 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1815 { 1816 1817 (void)printf("\nlocks: "); 1818 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1819 (void)printf(" inits: "); 1820 printb(rtm->rtm_inits, metricnames); 1821 if (msglen > sizeof(struct rt_msghdr)) 1822 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1823 msglen - sizeof(struct rt_msghdr)); 1824 else 1825 (void)fflush(stdout); 1826 } 1827 1828 static void 1829 pmsg_addrs(char *cp, int addrs, size_t len) 1830 { 1831 struct sockaddr *sa; 1832 int i; 1833 1834 if (addrs == 0) { 1835 (void)putchar('\n'); 1836 return; 1837 } 1838 (void)printf("\nsockaddrs: "); 1839 printb(addrs, addrnames); 1840 putchar('\n'); 1841 for (i = 0; i < RTAX_MAX; i++) 1842 if (addrs & (1 << i)) { 1843 sa = (struct sockaddr *)cp; 1844 if (len == 0 || len < SA_SIZE(sa)) { 1845 (void)printf(errfmt, __func__, len); 1846 break; 1847 } 1848 (void)printf(" %s", routename(sa)); 1849 len -= SA_SIZE(sa); 1850 cp += SA_SIZE(sa); 1851 } 1852 (void)putchar('\n'); 1853 (void)fflush(stdout); 1854 } 1855 1856 static void 1857 printb(int b, const char *str) 1858 { 1859 int i; 1860 int gotsome = 0; 1861 1862 if (b == 0) 1863 return; 1864 while ((i = *str++) != 0) { 1865 if (b & (1 << (i-1))) { 1866 if (gotsome == 0) 1867 i = '<'; 1868 else 1869 i = ','; 1870 putchar(i); 1871 gotsome = 1; 1872 for (; (i = *str) > 32; str++) 1873 putchar(i); 1874 } else 1875 while (*str > 32) 1876 str++; 1877 } 1878 if (gotsome) 1879 putchar('>'); 1880 } 1881 1882 int 1883 keyword(const char *cp) 1884 { 1885 const struct keytab *kt = keywords; 1886 1887 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1888 kt++; 1889 return (kt->kt_i); 1890 } 1891 1892 static void 1893 sodump(struct sockaddr *sa, const char *which) 1894 { 1895 char atalk_buf[ATALK_BUF_SIZE]; 1896 #ifdef INET6 1897 char nbuf[INET6_ADDRSTRLEN]; 1898 #endif 1899 1900 switch (sa->sa_family) { 1901 case AF_LINK: 1902 (void)printf("%s: link %s; ", which, 1903 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1904 break; 1905 #ifdef INET 1906 case AF_INET: 1907 (void)printf("%s: inet %s; ", which, 1908 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1909 break; 1910 #endif 1911 #ifdef INET6 1912 case AF_INET6: 1913 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1914 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1915 sizeof(nbuf))); 1916 break; 1917 #endif 1918 case AF_APPLETALK: 1919 (void)printf("%s: atalk %s; ", which, 1920 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr, 1921 atalk_buf)); 1922 break; 1923 } 1924 (void)fflush(stdout); 1925 } 1926 1927 /* States*/ 1928 #define VIRGIN 0 1929 #define GOTONE 1 1930 #define GOTTWO 2 1931 /* Inputs */ 1932 #define DIGIT (4*0) 1933 #define END (4*1) 1934 #define DELIM (4*2) 1935 1936 static void 1937 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1938 { 1939 char *cp = (char *)sa; 1940 char *cplim = cp + size; 1941 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1942 1943 memset(cp, 0, size); 1944 cp++; 1945 do { 1946 if ((*addr >= '0') && (*addr <= '9')) { 1947 new = *addr - '0'; 1948 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1949 new = *addr - 'a' + 10; 1950 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1951 new = *addr - 'A' + 10; 1952 } else if (*addr == '\0') 1953 state |= END; 1954 else 1955 state |= DELIM; 1956 addr++; 1957 switch (state /* | INPUT */) { 1958 case GOTTWO | DIGIT: 1959 *cp++ = byte; /*FALLTHROUGH*/ 1960 case VIRGIN | DIGIT: 1961 state = GOTONE; byte = new; continue; 1962 case GOTONE | DIGIT: 1963 state = GOTTWO; byte = new + (byte << 4); continue; 1964 default: /* | DELIM */ 1965 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1966 case GOTONE | END: 1967 case GOTTWO | END: 1968 *cp++ = byte; /* FALLTHROUGH */ 1969 case VIRGIN | END: 1970 break; 1971 } 1972 break; 1973 } while (cp < cplim); 1974 sa->sa_len = cp - (char *)sa; 1975 } 1976 1977 static int 1978 atalk_aton(const char *text, struct at_addr *addr) 1979 { 1980 u_int net, node; 1981 1982 if (sscanf(text, "%u.%u", &net, &node) != 2 1983 || net > 0xffff || node > 0xff) 1984 return(0); 1985 addr->s_net = htons(net); 1986 addr->s_node = node; 1987 return(1); 1988 } 1989 1990 static char * 1991 atalk_ntoa(struct at_addr at, char buf[ATALK_BUF_SIZE]) 1992 { 1993 (void)snprintf(buf, ATALK_BUF_SIZE, "%u.%u", ntohs(at.s_net), at.s_node); 1994 buf[ATALK_BUF_SIZE - 1] = '\0'; 1995 return(buf); 1996 } 1997