1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/file.h> 34 #include <sys/socket.h> 35 #include <sys/ioctl.h> 36 #ifdef JAIL 37 #include <sys/jail.h> 38 #endif 39 #include <sys/sysctl.h> 40 #include <sys/types.h> 41 #include <sys/queue.h> 42 43 #include <net/if.h> 44 #include <net/route.h> 45 #include <net/if_dl.h> 46 #include <netinet/in.h> 47 #include <netinet/if_ether.h> 48 #include <arpa/inet.h> 49 #include <netdb.h> 50 51 #include <ctype.h> 52 #include <err.h> 53 #include <errno.h> 54 #ifdef JAIL 55 #include <jail.h> 56 #endif 57 #include <paths.h> 58 #include <signal.h> 59 #include <stdbool.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <sysexits.h> 64 #include <time.h> 65 #include <unistd.h> 66 #include <ifaddrs.h> 67 68 struct fibl { 69 TAILQ_ENTRY(fibl) fl_next; 70 71 int fl_num; 72 int fl_error; 73 int fl_errno; 74 }; 75 76 static struct keytab { 77 const char *kt_cp; 78 int kt_i; 79 } const keywords[] = { 80 #include "keywords.h" 81 {0, 0} 82 }; 83 84 int verbose, debugonly; 85 #ifdef JAIL 86 char * jail_name; 87 #endif 88 static struct sockaddr_storage so[RTAX_MAX]; 89 static int pid, rtm_addrs; 90 static int nflag, af, aflen, qflag, tflag; 91 static int locking, lockrest; 92 static struct rt_metrics rt_metrics; 93 static u_long rtm_inits; 94 static uid_t uid; 95 static int defaultfib; 96 static int numfibs; 97 static char domain_storage[MAXHOSTNAMELEN + 1]; 98 static const char *domain; 99 static char rt_line[NI_MAXHOST]; 100 static char net_line[MAXHOSTNAMELEN + 1]; 101 102 #ifdef WITHOUT_NETLINK 103 static int s; 104 static int rtm_seq; 105 106 static struct { 107 struct rt_msghdr m_rtm; 108 char m_space[512]; 109 } m_rtmsg; 110 111 static int rtmsg_rtsock(int, int, int); 112 static int flushroutes_fib_rtsock(int); 113 static void monitor_rtsock(void); 114 #else 115 int rtmsg_nl(int, int, int, int, struct sockaddr_storage *, struct rt_metrics *); 116 int flushroutes_fib_nl(int, int); 117 void monitor_nl(int); 118 #endif 119 120 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 121 122 void printb(int, const char *); 123 static void flushroutes(int argc, char *argv[]); 124 static int flushroutes_fib(int); 125 static int getaddr(int, char *, int); 126 static int keyword(const char *); 127 #ifdef INET 128 static void inet_makemask(struct sockaddr_in *, u_long); 129 #endif 130 #ifdef INET6 131 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 132 #endif 133 static void interfaces(void); 134 static void monitor(int, char*[]); 135 const char *netname(struct sockaddr *); 136 static void newroute(int, char **); 137 static int newroute_fib(int, char *, int); 138 static void pmsg_addrs(char *, int, size_t); 139 static void pmsg_common(struct rt_msghdr *, size_t); 140 static int prefixlen(const char *); 141 static void print_getmsg(struct rt_msghdr *, int, int); 142 static void print_rtmsg(struct rt_msghdr *, size_t); 143 const char *routename(struct sockaddr *); 144 static int rtmsg(int, int, int); 145 static void set_metric(char *, int); 146 static int set_sofib(int); 147 static void sockaddr(char *, struct sockaddr *, size_t); 148 static void sodump(struct sockaddr *, const char *); 149 static int fiboptlist_csv(const char *, struct fibl_head_t *); 150 static int fiboptlist_range(const char *, struct fibl_head_t *); 151 152 static void usage(const char *) __dead2; 153 154 #define READ_TIMEOUT 10 155 static volatile sig_atomic_t stop_read; 156 157 static void 158 stopit(int sig __unused) 159 { 160 161 stop_read = 1; 162 } 163 164 static void 165 usage(const char *cp) 166 { 167 if (cp != NULL) 168 warnx("bad keyword: %s", cp); 169 errx(EX_USAGE, "usage: route [-j jail] [-46dnqtv] command [[modifiers] args]"); 170 /* NOTREACHED */ 171 } 172 173 int 174 main(int argc, char **argv) 175 { 176 int ch; 177 #ifdef JAIL 178 int jid; 179 #endif 180 size_t len; 181 182 if (argc < 2) 183 usage(NULL); 184 185 while ((ch = getopt(argc, argv, "46nqdtvj:")) != -1) 186 switch(ch) { 187 case '4': 188 #ifdef INET 189 af = AF_INET; 190 aflen = sizeof(struct sockaddr_in); 191 #else 192 errx(1, "IPv4 support is not compiled in"); 193 #endif 194 break; 195 case '6': 196 #ifdef INET6 197 af = AF_INET6; 198 aflen = sizeof(struct sockaddr_in6); 199 #else 200 errx(1, "IPv6 support is not compiled in"); 201 #endif 202 break; 203 case 'n': 204 nflag = 1; 205 break; 206 case 'q': 207 qflag = 1; 208 break; 209 case 'v': 210 verbose = 1; 211 break; 212 case 't': 213 tflag = 1; 214 break; 215 case 'd': 216 debugonly = 1; 217 break; 218 case 'j': 219 #ifdef JAIL 220 if (optarg == NULL) 221 usage(NULL); 222 jail_name = optarg; 223 #else 224 errx(1, "Jail support is not compiled in"); 225 #endif 226 break; 227 case '?': 228 default: 229 usage(NULL); 230 } 231 argc -= optind; 232 argv += optind; 233 234 pid = getpid(); 235 uid = geteuid(); 236 237 #ifdef JAIL 238 if (jail_name != NULL) { 239 jid = jail_getid(jail_name); 240 if (jid == -1) 241 errx(1, "Jail not found"); 242 if (jail_attach(jid) != 0) 243 errx(1, "Cannot attach to jail"); 244 } 245 #endif 246 247 #ifdef WITHOUT_NETLINK 248 if (tflag) 249 s = open(_PATH_DEVNULL, O_WRONLY, 0); 250 else 251 s = socket(PF_ROUTE, SOCK_RAW, 0); 252 if (s < 0) 253 err(EX_OSERR, "socket"); 254 #endif 255 256 len = sizeof(numfibs); 257 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 258 numfibs = -1; 259 260 len = sizeof(defaultfib); 261 if (numfibs != -1 && 262 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 263 0) == -1) 264 defaultfib = -1; 265 266 if (*argv != NULL) 267 switch (keyword(*argv)) { 268 case K_GET: 269 case K_SHOW: 270 uid = 0; 271 /* FALLTHROUGH */ 272 273 case K_CHANGE: 274 case K_ADD: 275 case K_DEL: 276 case K_DELETE: 277 newroute(argc, argv); 278 /* NOTREACHED */ 279 280 case K_MONITOR: 281 monitor(argc, argv); 282 /* NOTREACHED */ 283 284 case K_FLUSH: 285 flushroutes(argc, argv); 286 exit(0); 287 /* NOTREACHED */ 288 } 289 usage(*argv); 290 /* NOTREACHED */ 291 } 292 293 static int 294 set_sofib(int fib) 295 { 296 297 #ifdef WITHOUT_NETLINK 298 if (fib < 0) 299 return (0); 300 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 301 sizeof(fib))); 302 #else 303 return (0); 304 #endif 305 } 306 307 static int 308 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 309 { 310 struct fibl *fl; 311 char *str0, *str, *token, *endptr; 312 int fib[2], i, error; 313 314 str0 = str = strdup(arg); 315 error = 0; 316 i = 0; 317 while ((token = strsep(&str, "-")) != NULL) { 318 switch (i) { 319 case 0: 320 case 1: 321 errno = 0; 322 fib[i] = strtol(token, &endptr, 0); 323 if (errno == 0) { 324 if (*endptr != '\0' || 325 fib[i] < 0 || 326 (numfibs != -1 && fib[i] > numfibs - 1)) 327 errno = EINVAL; 328 } 329 if (errno) 330 error = 1; 331 break; 332 default: 333 error = 1; 334 } 335 if (error) 336 goto fiboptlist_range_ret; 337 i++; 338 } 339 if (fib[0] >= fib[1]) { 340 error = 1; 341 goto fiboptlist_range_ret; 342 } 343 for (i = fib[0]; i <= fib[1]; i++) { 344 fl = calloc(1, sizeof(*fl)); 345 if (fl == NULL) { 346 error = 1; 347 goto fiboptlist_range_ret; 348 } 349 fl->fl_num = i; 350 TAILQ_INSERT_TAIL(flh, fl, fl_next); 351 } 352 fiboptlist_range_ret: 353 free(str0); 354 return (error); 355 } 356 357 #define ALLSTRLEN 64 358 static int 359 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 360 { 361 struct fibl *fl; 362 char *str0, *str, *token, *endptr; 363 int fib, error; 364 365 str0 = str = NULL; 366 if (strcmp("all", arg) == 0) { 367 str = calloc(1, ALLSTRLEN); 368 if (str == NULL) { 369 error = 1; 370 goto fiboptlist_csv_ret; 371 } 372 if (numfibs > 1) 373 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 374 else 375 snprintf(str, ALLSTRLEN - 1, "%d", 0); 376 } else if (strcmp("default", arg) == 0) { 377 str0 = str = calloc(1, ALLSTRLEN); 378 if (str == NULL) { 379 error = 1; 380 goto fiboptlist_csv_ret; 381 } 382 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 383 } else 384 str0 = str = strdup(arg); 385 386 error = 0; 387 while ((token = strsep(&str, ",")) != NULL) { 388 if (*token != '-' && strchr(token, '-') != NULL) { 389 error = fiboptlist_range(token, flh); 390 if (error) 391 goto fiboptlist_csv_ret; 392 } else { 393 errno = 0; 394 fib = strtol(token, &endptr, 0); 395 if (errno == 0) { 396 if (*endptr != '\0' || 397 fib < 0 || 398 (numfibs != -1 && fib > numfibs - 1)) 399 errno = EINVAL; 400 } 401 if (errno) { 402 error = 1; 403 goto fiboptlist_csv_ret; 404 } 405 fl = calloc(1, sizeof(*fl)); 406 if (fl == NULL) { 407 error = 1; 408 goto fiboptlist_csv_ret; 409 } 410 fl->fl_num = fib; 411 TAILQ_INSERT_TAIL(flh, fl, fl_next); 412 } 413 } 414 fiboptlist_csv_ret: 415 if (str0 != NULL) 416 free(str0); 417 return (error); 418 } 419 420 /* 421 * Purge all entries in the routing tables not 422 * associated with network interfaces. 423 */ 424 static void 425 flushroutes(int argc, char *argv[]) 426 { 427 struct fibl *fl; 428 int error; 429 430 if (uid != 0 && !debugonly && !tflag) 431 errx(EX_NOPERM, "must be root to alter routing table"); 432 #ifdef WITHOUT_NETLINK 433 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 434 #endif 435 436 TAILQ_INIT(&fibl_head); 437 while (argc > 1) { 438 argc--; 439 argv++; 440 if (**argv != '-') 441 usage(*argv); 442 switch (keyword(*argv + 1)) { 443 #ifdef INET 444 case K_4: 445 case K_INET: 446 af = AF_INET; 447 break; 448 #endif 449 #ifdef INET6 450 case K_6: 451 case K_INET6: 452 af = AF_INET6; 453 break; 454 #endif 455 case K_LINK: 456 af = AF_LINK; 457 break; 458 case K_FIB: 459 if (!--argc) 460 usage(*argv); 461 error = fiboptlist_csv(*++argv, &fibl_head); 462 if (error) 463 errx(EX_USAGE, "invalid fib number: %s", *argv); 464 break; 465 default: 466 usage(*argv); 467 } 468 } 469 if (TAILQ_EMPTY(&fibl_head)) { 470 error = fiboptlist_csv("default", &fibl_head); 471 if (error) 472 errx(EX_OSERR, "fiboptlist_csv failed."); 473 } 474 TAILQ_FOREACH(fl, &fibl_head, fl_next) 475 flushroutes_fib(fl->fl_num); 476 } 477 478 static int 479 flushroutes_fib(int fib) 480 { 481 #ifdef WITHOUT_NETLINK 482 return (flushroutes_fib_rtsock(fib)); 483 #else 484 return (flushroutes_fib_nl(fib, af)); 485 #endif 486 } 487 488 #ifdef WITHOUT_NETLINK 489 static int 490 flushroutes_fib_rtsock(int fib) 491 { 492 struct rt_msghdr *rtm; 493 size_t needed; 494 char *buf, *next, *lim; 495 int mib[7], rlen, seqno, count = 0; 496 int error; 497 498 error = set_sofib(fib); 499 if (error) { 500 warn("fib number %d is ignored", fib); 501 return (error); 502 } 503 504 retry: 505 mib[0] = CTL_NET; 506 mib[1] = PF_ROUTE; 507 mib[2] = 0; /* protocol */ 508 mib[3] = AF_UNSPEC; 509 mib[4] = NET_RT_DUMP; 510 mib[5] = 0; /* no flags */ 511 mib[6] = fib; 512 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 513 err(EX_OSERR, "route-sysctl-estimate"); 514 if ((buf = malloc(needed)) == NULL) 515 errx(EX_OSERR, "malloc failed"); 516 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 517 if (errno == ENOMEM && count++ < 10) { 518 warnx("Routing table grew, retrying"); 519 sleep(1); 520 free(buf); 521 goto retry; 522 } 523 err(EX_OSERR, "route-sysctl-get"); 524 } 525 lim = buf + needed; 526 if (verbose) 527 (void)printf("Examining routing table from sysctl\n"); 528 seqno = 0; /* ??? */ 529 for (next = buf; next < lim; next += rtm->rtm_msglen) { 530 rtm = (struct rt_msghdr *)(void *)next; 531 if (verbose) 532 print_rtmsg(rtm, rtm->rtm_msglen); 533 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 534 continue; 535 if (af != 0) { 536 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 537 538 if (sa->sa_family != af) 539 continue; 540 } 541 if (debugonly) 542 continue; 543 rtm->rtm_type = RTM_DELETE; 544 rtm->rtm_seq = seqno; 545 rlen = write(s, next, rtm->rtm_msglen); 546 if (rlen < 0 && errno == EPERM) 547 err(1, "write to routing socket"); 548 if (rlen < (int)rtm->rtm_msglen) { 549 warn("write to routing socket"); 550 (void)printf("got only %d for rlen\n", rlen); 551 free(buf); 552 goto retry; 553 break; 554 } 555 seqno++; 556 if (qflag) 557 continue; 558 if (verbose) 559 print_rtmsg(rtm, rlen); 560 else { 561 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 562 563 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 564 routename(sa) : netname(sa)); 565 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 566 printf("%-20.20s ", routename(sa)); 567 if (fib >= 0) 568 printf("-fib %-3d ", fib); 569 printf("done\n"); 570 } 571 } 572 free(buf); 573 return (error); 574 } 575 #endif 576 577 const char * 578 routename(struct sockaddr *sa) 579 { 580 struct sockaddr_dl *sdl; 581 const char *cp; 582 int n; 583 584 if (domain == NULL) { 585 if (gethostname(domain_storage, 586 sizeof(domain_storage) - 1) == 0 && 587 (cp = strchr(domain_storage, '.')) != NULL) { 588 domain_storage[sizeof(domain_storage) - 1] = '\0'; 589 domain = cp + 1; 590 } else { 591 domain_storage[0] = '\0'; 592 domain = domain_storage; 593 } 594 } 595 596 /* If the address is zero-filled, use "default". */ 597 if (sa->sa_len == 0 && nflag == 0) 598 return ("default"); 599 #if defined(INET) || defined(INET6) 600 switch (sa->sa_family) { 601 #ifdef INET 602 case AF_INET: 603 /* If the address is zero-filled, use "default". */ 604 if (nflag == 0 && 605 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 606 INADDR_ANY) 607 return("default"); 608 break; 609 #endif 610 #ifdef INET6 611 case AF_INET6: 612 /* If the address is zero-filled, use "default". */ 613 if (nflag == 0 && 614 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 615 return("default"); 616 break; 617 #endif 618 } 619 #endif 620 621 switch (sa->sa_family) { 622 #if defined(INET) || defined(INET6) 623 #ifdef INET 624 case AF_INET: 625 #endif 626 #ifdef INET6 627 case AF_INET6: 628 #endif 629 { 630 struct sockaddr_storage ss; 631 int error; 632 char *p; 633 634 memset(&ss, 0, sizeof(ss)); 635 if (sa->sa_len == 0) 636 ss.ss_family = sa->sa_family; 637 else 638 memcpy(&ss, sa, sa->sa_len); 639 /* Expand sa->sa_len because it could be shortened. */ 640 if (sa->sa_family == AF_INET) 641 ss.ss_len = sizeof(struct sockaddr_in); 642 else if (sa->sa_family == AF_INET6) 643 ss.ss_len = sizeof(struct sockaddr_in6); 644 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 645 rt_line, sizeof(rt_line), NULL, 0, 646 (nflag == 0) ? 0 : NI_NUMERICHOST); 647 if (error) { 648 warnx("getnameinfo(): %s", gai_strerror(error)); 649 strncpy(rt_line, "invalid", sizeof(rt_line)); 650 } 651 652 /* Remove the domain part if any. */ 653 p = strchr(rt_line, '.'); 654 if (p != NULL && strcmp(p + 1, domain) == 0) 655 *p = '\0'; 656 657 return (rt_line); 658 break; 659 } 660 #endif 661 case AF_LINK: 662 sdl = (struct sockaddr_dl *)(void *)sa; 663 664 if (sdl->sdl_nlen == 0 && 665 sdl->sdl_alen == 0 && 666 sdl->sdl_slen == 0) { 667 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 668 sdl->sdl_index); 669 if (n > (int)sizeof(rt_line)) 670 rt_line[0] = '\0'; 671 return (rt_line); 672 } else 673 return (link_ntoa(sdl)); 674 break; 675 676 default: 677 { 678 u_short *sp = (u_short *)(void *)sa; 679 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 680 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 681 char *cpe = rt_line + sizeof(rt_line); 682 683 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 684 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 685 cps += n; 686 else 687 *cps = '\0'; 688 break; 689 } 690 } 691 return (rt_line); 692 } 693 694 /* 695 * Return the name of the network whose address is given. 696 * The address is assumed to be that of a net, not a host. 697 */ 698 const char * 699 netname(struct sockaddr *sa) 700 { 701 struct sockaddr_dl *sdl; 702 int n; 703 #ifdef INET 704 struct netent *np = NULL; 705 const char *cp = NULL; 706 u_long i; 707 #endif 708 709 switch (sa->sa_family) { 710 #ifdef INET 711 case AF_INET: 712 { 713 struct in_addr in; 714 715 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 716 i = in.s_addr = ntohl(in.s_addr); 717 if (in.s_addr == 0) 718 cp = "default"; 719 else if (!nflag) { 720 np = getnetbyaddr(i, AF_INET); 721 if (np != NULL) 722 cp = np->n_name; 723 } 724 #define C(x) (unsigned)((x) & 0xff) 725 if (cp != NULL) 726 strncpy(net_line, cp, sizeof(net_line)); 727 else if ((in.s_addr & 0xffffff) == 0) 728 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 729 else if ((in.s_addr & 0xffff) == 0) 730 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 731 C(in.s_addr >> 16)); 732 else if ((in.s_addr & 0xff) == 0) 733 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 734 C(in.s_addr >> 16), C(in.s_addr >> 8)); 735 else 736 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 737 C(in.s_addr >> 16), C(in.s_addr >> 8), 738 C(in.s_addr)); 739 #undef C 740 break; 741 } 742 #endif 743 #ifdef INET6 744 case AF_INET6: 745 { 746 struct sockaddr_in6 sin6; 747 int niflags = 0; 748 749 memset(&sin6, 0, sizeof(sin6)); 750 memcpy(&sin6, sa, sa->sa_len); 751 sin6.sin6_len = sizeof(sin6); 752 sin6.sin6_family = AF_INET6; 753 if (nflag) 754 niflags |= NI_NUMERICHOST; 755 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 756 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 757 strncpy(net_line, "invalid", sizeof(net_line)); 758 759 return(net_line); 760 } 761 #endif 762 case AF_LINK: 763 sdl = (struct sockaddr_dl *)(void *)sa; 764 765 if (sdl->sdl_nlen == 0 && 766 sdl->sdl_alen == 0 && 767 sdl->sdl_slen == 0) { 768 n = snprintf(net_line, sizeof(net_line), "link#%d", 769 sdl->sdl_index); 770 if (n > (int)sizeof(net_line)) 771 net_line[0] = '\0'; 772 return (net_line); 773 } else 774 return (link_ntoa(sdl)); 775 break; 776 777 default: 778 { 779 u_short *sp = (u_short *)(void *)sa->sa_data; 780 u_short *splim = sp + ((sa->sa_len + 1)>>1); 781 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 782 char *cpe = net_line + sizeof(net_line); 783 784 while (sp < splim && cps < cpe) 785 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 786 cps += n; 787 else 788 *cps = '\0'; 789 break; 790 } 791 } 792 return (net_line); 793 } 794 795 static void 796 set_metric(char *value, int key) 797 { 798 int flag = 0; 799 char *endptr; 800 u_long noval, *valp = &noval; 801 802 switch (key) { 803 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 804 caseof(K_MTU, RTV_MTU, rmx_mtu); 805 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 806 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 807 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 808 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 809 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 810 caseof(K_RTT, RTV_RTT, rmx_rtt); 811 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 812 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 813 } 814 rtm_inits |= flag; 815 if (lockrest || locking) 816 rt_metrics.rmx_locks |= flag; 817 if (locking) 818 locking = 0; 819 errno = 0; 820 *valp = strtol(value, &endptr, 0); 821 if (errno == 0 && *endptr != '\0') 822 errno = EINVAL; 823 if (errno) 824 err(EX_USAGE, "%s", value); 825 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 826 struct timespec ts; 827 828 clock_gettime(CLOCK_REALTIME_FAST, &ts); 829 *valp += ts.tv_sec; 830 } 831 } 832 833 #define F_ISHOST 0x01 834 #define F_FORCENET 0x02 835 #define F_FORCEHOST 0x04 836 #define F_PROXY 0x08 837 #define F_INTERFACE 0x10 838 839 static void 840 newroute(int argc, char **argv) 841 { 842 struct sigaction sa; 843 struct fibl *fl; 844 char *cmd; 845 const char *dest, *gateway, *errmsg; 846 int key, error, flags, nrflags, fibnum; 847 848 if (uid != 0 && !debugonly && !tflag) 849 errx(EX_NOPERM, "must be root to alter routing table"); 850 dest = NULL; 851 gateway = NULL; 852 flags = RTF_STATIC; 853 nrflags = 0; 854 TAILQ_INIT(&fibl_head); 855 856 sigemptyset(&sa.sa_mask); 857 sa.sa_flags = 0; 858 sa.sa_handler = stopit; 859 if (sigaction(SIGALRM, &sa, 0) == -1) 860 warn("sigaction SIGALRM"); 861 862 cmd = argv[0]; 863 #ifdef WITHOUT_NETLINK 864 if (*cmd != 'g' && *cmd != 's') 865 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 866 #endif 867 while (--argc > 0) { 868 if (**(++argv)== '-') { 869 switch (key = keyword(1 + *argv)) { 870 case K_LINK: 871 af = AF_LINK; 872 aflen = sizeof(struct sockaddr_dl); 873 break; 874 #ifdef INET 875 case K_4: 876 case K_INET: 877 af = AF_INET; 878 aflen = sizeof(struct sockaddr_in); 879 break; 880 #endif 881 #ifdef INET6 882 case K_6: 883 case K_INET6: 884 af = AF_INET6; 885 aflen = sizeof(struct sockaddr_in6); 886 break; 887 #endif 888 case K_SA: 889 af = PF_ROUTE; 890 aflen = sizeof(struct sockaddr_storage); 891 break; 892 case K_IFACE: 893 case K_INTERFACE: 894 nrflags |= F_INTERFACE; 895 break; 896 case K_NOSTATIC: 897 flags &= ~RTF_STATIC; 898 break; 899 case K_LOCK: 900 locking = 1; 901 break; 902 case K_LOCKREST: 903 lockrest = 1; 904 break; 905 case K_HOST: 906 nrflags |= F_FORCEHOST; 907 break; 908 case K_REJECT: 909 flags |= RTF_REJECT; 910 break; 911 case K_BLACKHOLE: 912 flags |= RTF_BLACKHOLE; 913 break; 914 case K_PROTO1: 915 flags |= RTF_PROTO1; 916 break; 917 case K_PROTO2: 918 flags |= RTF_PROTO2; 919 break; 920 case K_PROXY: 921 nrflags |= F_PROXY; 922 break; 923 case K_XRESOLVE: 924 flags |= RTF_XRESOLVE; 925 break; 926 case K_STATIC: 927 flags |= RTF_STATIC; 928 break; 929 case K_STICKY: 930 flags |= RTF_STICKY; 931 break; 932 case K_NOSTICK: 933 flags &= ~RTF_STICKY; 934 break; 935 case K_FIB: 936 if (!--argc) 937 usage(NULL); 938 error = fiboptlist_csv(*++argv, &fibl_head); 939 if (error) 940 errx(EX_USAGE, 941 "invalid fib number: %s", *argv); 942 break; 943 case K_IFA: 944 if (!--argc) 945 usage(NULL); 946 getaddr(RTAX_IFA, *++argv, nrflags); 947 break; 948 case K_IFP: 949 if (!--argc) 950 usage(NULL); 951 getaddr(RTAX_IFP, *++argv, nrflags); 952 break; 953 case K_GENMASK: 954 if (!--argc) 955 usage(NULL); 956 getaddr(RTAX_GENMASK, *++argv, nrflags); 957 break; 958 case K_GATEWAY: 959 if (!--argc) 960 usage(NULL); 961 getaddr(RTAX_GATEWAY, *++argv, nrflags); 962 gateway = *argv; 963 break; 964 case K_DST: 965 if (!--argc) 966 usage(NULL); 967 if (getaddr(RTAX_DST, *++argv, nrflags)) 968 nrflags |= F_ISHOST; 969 dest = *argv; 970 break; 971 case K_NETMASK: 972 if (!--argc) 973 usage(NULL); 974 getaddr(RTAX_NETMASK, *++argv, nrflags); 975 /* FALLTHROUGH */ 976 case K_NET: 977 nrflags |= F_FORCENET; 978 break; 979 case K_PREFIXLEN: 980 if (!--argc) 981 usage(NULL); 982 if (prefixlen(*++argv) == -1) { 983 nrflags &= ~F_FORCENET; 984 nrflags |= F_ISHOST; 985 } else { 986 nrflags |= F_FORCENET; 987 nrflags &= ~F_ISHOST; 988 } 989 break; 990 case K_MTU: 991 case K_HOPCOUNT: 992 case K_EXPIRE: 993 case K_RECVPIPE: 994 case K_SENDPIPE: 995 case K_SSTHRESH: 996 case K_RTT: 997 case K_RTTVAR: 998 case K_WEIGHT: 999 if (!--argc) 1000 usage(NULL); 1001 set_metric(*++argv, key); 1002 break; 1003 default: 1004 usage(1+*argv); 1005 } 1006 } else { 1007 if ((rtm_addrs & RTA_DST) == 0) { 1008 dest = *argv; 1009 if (getaddr(RTAX_DST, *argv, nrflags)) 1010 nrflags |= F_ISHOST; 1011 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 1012 gateway = *argv; 1013 getaddr(RTAX_GATEWAY, *argv, nrflags); 1014 } else { 1015 getaddr(RTAX_NETMASK, *argv, nrflags); 1016 nrflags |= F_FORCENET; 1017 } 1018 } 1019 } 1020 1021 /* Do some sanity checks on resulting request */ 1022 if (so[RTAX_DST].ss_len == 0) { 1023 warnx("destination parameter required"); 1024 usage(NULL); 1025 } 1026 1027 if (so[RTAX_NETMASK].ss_len != 0 && 1028 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 1029 warnx("destination and netmask family need to be the same"); 1030 usage(NULL); 1031 } 1032 1033 if (nrflags & F_FORCEHOST) { 1034 nrflags |= F_ISHOST; 1035 #ifdef INET6 1036 if (af == AF_INET6) { 1037 rtm_addrs &= ~RTA_NETMASK; 1038 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 1039 } 1040 #endif 1041 } 1042 if (nrflags & F_FORCENET) 1043 nrflags &= ~F_ISHOST; 1044 flags |= RTF_UP; 1045 if (nrflags & F_ISHOST) 1046 flags |= RTF_HOST; 1047 if ((nrflags & F_INTERFACE) == 0) 1048 flags |= RTF_GATEWAY; 1049 if (nrflags & F_PROXY) 1050 flags |= RTF_ANNOUNCE; 1051 if (dest == NULL) 1052 dest = ""; 1053 if (gateway == NULL) 1054 gateway = ""; 1055 1056 if (TAILQ_EMPTY(&fibl_head)) { 1057 error = fiboptlist_csv("default", &fibl_head); 1058 if (error) 1059 errx(EX_OSERR, "fiboptlist_csv failed."); 1060 } 1061 error = 0; 1062 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1063 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1064 if (fl->fl_error) 1065 fl->fl_errno = errno; 1066 error += fl->fl_error; 1067 } 1068 if (*cmd == 'g' || *cmd == 's') 1069 exit(error); 1070 1071 error = 0; 1072 if (!qflag) { 1073 fibnum = 0; 1074 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1075 if (fl->fl_error == 0) 1076 fibnum++; 1077 } 1078 if (fibnum > 0) { 1079 int firstfib = 1; 1080 1081 printf("%s %s %s", cmd, 1082 (nrflags & F_ISHOST) ? "host" : "net", dest); 1083 if (*gateway) 1084 printf(": gateway %s", gateway); 1085 1086 if (numfibs > 1) { 1087 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1088 if (fl->fl_error == 0 1089 && fl->fl_num >= 0) { 1090 if (firstfib) { 1091 printf(" fib "); 1092 firstfib = 0; 1093 } 1094 printf("%d", fl->fl_num); 1095 if (fibnum-- > 1) 1096 printf(","); 1097 } 1098 } 1099 } 1100 printf("\n"); 1101 } 1102 } 1103 1104 fibnum = 0; 1105 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1106 if (fl->fl_error != 0) { 1107 error = 1; 1108 if (!qflag) { 1109 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1110 ? "host" : "net", dest); 1111 if (*gateway) 1112 printf(": gateway %s", gateway); 1113 1114 if (fl->fl_num >= 0) 1115 printf(" fib %d", fl->fl_num); 1116 1117 switch (fl->fl_errno) { 1118 case ESRCH: 1119 errmsg = "not in table"; 1120 break; 1121 case EBUSY: 1122 errmsg = "entry in use"; 1123 break; 1124 case ENOBUFS: 1125 errmsg = "not enough memory"; 1126 break; 1127 case EADDRINUSE: 1128 /* 1129 * handle recursion avoidance 1130 * in rt_setgate() 1131 */ 1132 errmsg = "gateway uses the same route"; 1133 break; 1134 case EEXIST: 1135 errmsg = "route already in table"; 1136 break; 1137 default: 1138 errmsg = strerror(fl->fl_errno); 1139 break; 1140 } 1141 printf(": %s\n", errmsg); 1142 } 1143 } 1144 } 1145 exit(error); 1146 } 1147 1148 static int 1149 newroute_fib(int fib, char *cmd, int flags) 1150 { 1151 int error; 1152 1153 error = set_sofib(fib); 1154 if (error) { 1155 warn("fib number %d is ignored", fib); 1156 return (error); 1157 } 1158 1159 error = rtmsg(*cmd, flags, fib); 1160 return (error); 1161 } 1162 1163 #ifdef INET 1164 static void 1165 inet_makemask(struct sockaddr_in *sin_mask, u_long bits) 1166 { 1167 u_long mask = 0; 1168 1169 rtm_addrs |= RTA_NETMASK; 1170 1171 if (bits != 0) 1172 mask = 0xffffffff << (32 - bits); 1173 1174 sin_mask->sin_addr.s_addr = htonl(mask); 1175 sin_mask->sin_len = sizeof(struct sockaddr_in); 1176 sin_mask->sin_family = AF_INET; 1177 } 1178 #endif 1179 1180 #ifdef INET6 1181 /* 1182 * XXX the function may need more improvement... 1183 */ 1184 static int 1185 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1186 { 1187 1188 if (plen == NULL) { 1189 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1190 sin6->sin6_scope_id == 0) 1191 plen = "0"; 1192 } 1193 1194 if (plen == NULL || strcmp(plen, "128") == 0) 1195 return (1); 1196 rtm_addrs |= RTA_NETMASK; 1197 prefixlen(plen); 1198 return (0); 1199 } 1200 #endif 1201 1202 /* 1203 * Interpret an argument as a network address of some kind, 1204 * returning 1 if a host address, 0 if a network address. 1205 */ 1206 static int 1207 getaddr(int idx, char *str, int nrflags) 1208 { 1209 struct sockaddr *sa; 1210 #if defined(INET) 1211 struct sockaddr_in *sin; 1212 struct hostent *hp; 1213 char *q; 1214 #elif defined(INET6) 1215 char *q; 1216 #endif 1217 1218 if (idx < 0 || idx >= RTAX_MAX) 1219 usage("internal error"); 1220 if (af == 0) { 1221 #if defined(INET) 1222 af = AF_INET; 1223 aflen = sizeof(struct sockaddr_in); 1224 #elif defined(INET6) 1225 af = AF_INET6; 1226 aflen = sizeof(struct sockaddr_in6); 1227 #else 1228 af = AF_LINK; 1229 aflen = sizeof(struct sockaddr_dl); 1230 #endif 1231 } 1232 rtm_addrs |= (1 << idx); 1233 sa = (struct sockaddr *)&so[idx]; 1234 sa->sa_family = af; 1235 sa->sa_len = aflen; 1236 1237 switch (idx) { 1238 case RTAX_GATEWAY: 1239 if (nrflags & F_INTERFACE) { 1240 struct ifaddrs *ifap, *ifa; 1241 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1242 struct sockaddr_dl *sdl = NULL; 1243 1244 if (getifaddrs(&ifap)) 1245 err(EX_OSERR, "getifaddrs"); 1246 1247 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1248 if (ifa->ifa_addr->sa_family != AF_LINK) 1249 continue; 1250 1251 if (strcmp(str, ifa->ifa_name) != 0) 1252 continue; 1253 1254 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1255 } 1256 /* If we found it, then use it */ 1257 if (sdl != NULL) { 1258 /* 1259 * Note that we need to copy before calling 1260 * freeifaddrs(). 1261 */ 1262 memcpy(sdl0, sdl, sdl->sdl_len); 1263 } 1264 freeifaddrs(ifap); 1265 if (sdl != NULL) 1266 return(1); 1267 else 1268 errx(EX_DATAERR, 1269 "interface '%s' does not exist", str); 1270 } 1271 break; 1272 case RTAX_IFP: 1273 sa->sa_family = AF_LINK; 1274 break; 1275 } 1276 if (strcmp(str, "default") == 0) { 1277 /* 1278 * Default is net 0.0.0.0/0 1279 */ 1280 switch (idx) { 1281 case RTAX_DST: 1282 nrflags |= F_FORCENET; 1283 getaddr(RTAX_NETMASK, str, nrflags); 1284 break; 1285 } 1286 return (0); 1287 } 1288 switch (sa->sa_family) { 1289 #ifdef INET6 1290 case AF_INET6: 1291 { 1292 struct addrinfo hints, *res; 1293 int ecode; 1294 1295 q = NULL; 1296 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1297 *q = '\0'; 1298 memset(&hints, 0, sizeof(hints)); 1299 hints.ai_family = sa->sa_family; 1300 hints.ai_socktype = SOCK_DGRAM; 1301 ecode = getaddrinfo(str, NULL, &hints, &res); 1302 if (ecode != 0 || res->ai_family != AF_INET6 || 1303 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1304 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1305 memcpy(sa, res->ai_addr, res->ai_addrlen); 1306 freeaddrinfo(res); 1307 if (q != NULL) 1308 *q++ = '/'; 1309 if (idx == RTAX_DST) 1310 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1311 return (0); 1312 } 1313 #endif /* INET6 */ 1314 case AF_LINK: 1315 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1316 return (1); 1317 1318 case PF_ROUTE: 1319 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1320 return (1); 1321 #ifdef INET 1322 case AF_INET: 1323 #endif 1324 default: 1325 break; 1326 } 1327 1328 #ifdef INET 1329 sin = (struct sockaddr_in *)(void *)sa; 1330 1331 q = strchr(str,'/'); 1332 if (q != NULL && idx == RTAX_DST) { 1333 /* A.B.C.D/NUM */ 1334 struct sockaddr_in *mask; 1335 uint32_t mask_bits; 1336 1337 *q = '\0'; 1338 if (inet_aton(str, &sin->sin_addr) == 0) 1339 errx(EX_NOHOST, "bad address: %s", str); 1340 1341 int masklen = strtol(q + 1, NULL, 10); 1342 if (masklen < 0 || masklen > 32) 1343 errx(EX_NOHOST, "bad mask length: %s", q + 1); 1344 1345 inet_makemask((struct sockaddr_in *)&so[RTAX_NETMASK],masklen); 1346 1347 /* 1348 * Check for bogus destination such as "10/8"; heuristic is 1349 * that there are bits set in the host part, and no dot 1350 * is present. 1351 */ 1352 mask = ((struct sockaddr_in *) &so[RTAX_NETMASK]); 1353 mask_bits = ntohl(mask->sin_addr.s_addr); 1354 if ((ntohl(sin->sin_addr.s_addr) & ~mask_bits) != 0 && 1355 strchr(str, '.') == NULL) 1356 errx(EX_NOHOST, 1357 "malformed address, bits set after mask;" 1358 " %s means %s", 1359 str, inet_ntoa(sin->sin_addr)); 1360 return (0); 1361 } 1362 if (inet_aton(str, &sin->sin_addr) != 0) 1363 return (1); 1364 1365 hp = gethostbyname(str); 1366 if (hp != NULL) { 1367 sin->sin_family = hp->h_addrtype; 1368 memmove((char *)&sin->sin_addr, hp->h_addr, 1369 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1370 return (1); 1371 } 1372 #endif 1373 errx(EX_NOHOST, "bad address: %s", str); 1374 } 1375 1376 static int 1377 prefixlen(const char *str) 1378 { 1379 int len = atoi(str), q, r; 1380 int max; 1381 char *p; 1382 1383 rtm_addrs |= RTA_NETMASK; 1384 switch (af) { 1385 #ifdef INET6 1386 case AF_INET6: 1387 { 1388 struct sockaddr_in6 *sin6 = 1389 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1390 1391 max = 128; 1392 p = (char *)&sin6->sin6_addr; 1393 sin6->sin6_family = AF_INET6; 1394 sin6->sin6_len = sizeof(*sin6); 1395 break; 1396 } 1397 #endif 1398 #ifdef INET 1399 case AF_INET: 1400 { 1401 struct sockaddr_in *sin = 1402 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1403 1404 max = 32; 1405 p = (char *)&sin->sin_addr; 1406 sin->sin_family = AF_INET; 1407 sin->sin_len = sizeof(*sin); 1408 break; 1409 } 1410 #endif 1411 default: 1412 errx(EX_OSERR, "prefixlen not supported in this af"); 1413 } 1414 1415 if (len < 0 || max < len) 1416 errx(EX_USAGE, "%s: invalid prefixlen", str); 1417 1418 q = len >> 3; 1419 r = len & 7; 1420 memset((void *)p, 0, max / 8); 1421 if (q > 0) 1422 memset((void *)p, 0xff, q); 1423 if (r > 0) 1424 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1425 if (len == max) 1426 return (-1); 1427 else 1428 return (len); 1429 } 1430 1431 static void 1432 interfaces(void) 1433 { 1434 size_t needed; 1435 int mib[6]; 1436 char *buf, *lim, *next, count = 0; 1437 struct rt_msghdr *rtm; 1438 1439 retry2: 1440 mib[0] = CTL_NET; 1441 mib[1] = PF_ROUTE; 1442 mib[2] = 0; /* protocol */ 1443 mib[3] = AF_UNSPEC; 1444 mib[4] = NET_RT_IFLIST; 1445 mib[5] = 0; /* no flags */ 1446 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1447 err(EX_OSERR, "route-sysctl-estimate"); 1448 if ((buf = malloc(needed)) == NULL) 1449 errx(EX_OSERR, "malloc failed"); 1450 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1451 if (errno == ENOMEM && count++ < 10) { 1452 warnx("Routing table grew, retrying"); 1453 sleep(1); 1454 free(buf); 1455 goto retry2; 1456 } 1457 err(EX_OSERR, "actual retrieval of interface table"); 1458 } 1459 lim = buf + needed; 1460 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1461 rtm = (struct rt_msghdr *)(void *)next; 1462 print_rtmsg(rtm, rtm->rtm_msglen); 1463 } 1464 free(buf); 1465 } 1466 1467 static void 1468 monitor(int argc, char *argv[]) 1469 { 1470 int fib, error; 1471 char *endptr; 1472 1473 fib = defaultfib; 1474 while (argc > 1) { 1475 argc--; 1476 argv++; 1477 if (**argv != '-') 1478 usage(*argv); 1479 switch (keyword(*argv + 1)) { 1480 case K_FIB: 1481 if (!--argc) 1482 usage(*argv); 1483 errno = 0; 1484 fib = strtol(*++argv, &endptr, 0); 1485 if (errno == 0) { 1486 if (*endptr != '\0' || 1487 fib < 0 || 1488 (numfibs != -1 && fib > numfibs - 1)) 1489 errno = EINVAL; 1490 } 1491 if (errno) 1492 errx(EX_USAGE, "invalid fib number: %s", *argv); 1493 break; 1494 default: 1495 usage(*argv); 1496 } 1497 } 1498 error = set_sofib(fib); 1499 if (error) 1500 errx(EX_USAGE, "invalid fib number: %d", fib); 1501 1502 verbose = 1; 1503 if (debugonly) { 1504 interfaces(); 1505 exit(0); 1506 } 1507 #ifdef WITHOUT_NETLINK 1508 monitor_rtsock(); 1509 #else 1510 monitor_nl(fib); 1511 #endif 1512 } 1513 1514 #ifdef WITHOUT_NETLINK 1515 static void 1516 monitor_rtsock(void) 1517 { 1518 char msg[2048]; 1519 int n; 1520 1521 #ifdef SO_RERROR 1522 n = 1; 1523 if (setsockopt(s, SOL_SOCKET, SO_RERROR, &n, sizeof(n)) == -1) 1524 warn("SO_RERROR"); 1525 #endif 1526 1527 for (;;) { 1528 time_t now; 1529 n = read(s, msg, sizeof(msg)); 1530 if (n == -1) { 1531 warn("read"); 1532 continue; 1533 } 1534 now = time(NULL); 1535 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1536 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1537 } 1538 } 1539 #endif 1540 1541 static int 1542 rtmsg(int cmd, int flags, int fib) 1543 { 1544 errno = 0; 1545 if (cmd == 'a') 1546 cmd = RTM_ADD; 1547 else if (cmd == 'c') 1548 cmd = RTM_CHANGE; 1549 else if (cmd == 'g' || cmd == 's') { 1550 cmd = RTM_GET; 1551 if (so[RTAX_IFP].ss_family == 0) { 1552 so[RTAX_IFP].ss_family = AF_LINK; 1553 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1554 rtm_addrs |= RTA_IFP; 1555 } 1556 } else { 1557 cmd = RTM_DELETE; 1558 flags |= RTF_PINNED; 1559 } 1560 #ifdef WITHOUT_NETLINK 1561 return (rtmsg_rtsock(cmd, flags, fib)); 1562 #else 1563 errno = rtmsg_nl(cmd, flags, fib, rtm_addrs, so, &rt_metrics); 1564 return (errno == 0 ? 0 : -1); 1565 #endif 1566 } 1567 1568 #ifdef WITHOUT_NETLINK 1569 static int 1570 rtmsg_rtsock(int cmd, int flags, int fib) 1571 { 1572 int rlen; 1573 char *cp = m_rtmsg.m_space; 1574 int l; 1575 1576 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1577 1578 #define NEXTADDR(w, u) \ 1579 if (rtm_addrs & (w)) { \ 1580 l = SA_SIZE(&(u)); \ 1581 memmove(cp, (char *)&(u), l); \ 1582 cp += l; \ 1583 if (verbose) \ 1584 sodump((struct sockaddr *)&(u), #w); \ 1585 } 1586 1587 #define rtm m_rtmsg.m_rtm 1588 rtm.rtm_type = cmd; 1589 rtm.rtm_flags = flags; 1590 rtm.rtm_version = RTM_VERSION; 1591 rtm.rtm_seq = ++rtm_seq; 1592 rtm.rtm_addrs = rtm_addrs; 1593 rtm.rtm_rmx = rt_metrics; 1594 rtm.rtm_inits = rtm_inits; 1595 1596 NEXTADDR(RTA_DST, so[RTAX_DST]); 1597 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1598 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1599 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1600 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1601 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1602 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1603 if (verbose) 1604 print_rtmsg(&rtm, l); 1605 if (debugonly) 1606 return (0); 1607 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1608 switch (errno) { 1609 case EPERM: 1610 err(1, "writing to routing socket"); 1611 break; 1612 case ESRCH: 1613 warnx("route has not been found"); 1614 break; 1615 case EEXIST: 1616 /* Handled by newroute() */ 1617 break; 1618 default: 1619 warn("writing to routing socket"); 1620 } 1621 return (-1); 1622 } 1623 if (cmd == RTM_GET) { 1624 stop_read = 0; 1625 alarm(READ_TIMEOUT); 1626 do { 1627 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1628 } while (l > 0 && stop_read == 0 && 1629 (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq || 1630 rtm.rtm_pid != pid)); 1631 if (stop_read != 0) { 1632 warnx("read from routing socket timed out"); 1633 return (-1); 1634 } else 1635 alarm(0); 1636 if (l < 0) 1637 warn("read from routing socket"); 1638 else 1639 print_getmsg(&rtm, l, fib); 1640 } 1641 #undef rtm 1642 return (0); 1643 } 1644 #endif 1645 1646 static const char *const msgtypes[] = { 1647 "", 1648 "RTM_ADD: Add Route", 1649 "RTM_DELETE: Delete Route", 1650 "RTM_CHANGE: Change Metrics or flags", 1651 "RTM_GET: Report Metrics", 1652 "RTM_LOSING: Kernel Suspects Partitioning", 1653 "RTM_REDIRECT: Told to use different route", 1654 "RTM_MISS: Lookup failed on this address", 1655 "RTM_LOCK: fix specified metrics", 1656 "RTM_OLDADD: caused by SIOCADDRT", 1657 "RTM_OLDDEL: caused by SIOCDELRT", 1658 "RTM_RESOLVE: Route created by cloning", 1659 "RTM_NEWADDR: address being added to iface", 1660 "RTM_DELADDR: address being removed from iface", 1661 "RTM_IFINFO: iface status change", 1662 "RTM_NEWMADDR: new multicast group membership on iface", 1663 "RTM_DELMADDR: multicast group membership removed from iface", 1664 "RTM_IFANNOUNCE: interface arrival/departure", 1665 "RTM_IEEE80211: IEEE 802.11 wireless event", 1666 }; 1667 1668 static const char metricnames[] = 1669 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1670 "\1mtu"; 1671 const char routeflags[] = 1672 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1673 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1674 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1675 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1676 static const char ifnetflags[] = 1677 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1678 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1679 "\017LINK2\020MULTICAST"; 1680 static const char addrnames[] = 1681 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1682 1683 static const char errfmt[] = 1684 "\n%s: truncated route message, only %zu bytes left\n"; 1685 1686 static void 1687 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1688 { 1689 struct if_msghdr *ifm; 1690 struct ifa_msghdr *ifam; 1691 #ifdef RTM_NEWMADDR 1692 struct ifma_msghdr *ifmam; 1693 #endif 1694 struct if_announcemsghdr *ifan; 1695 const char *state; 1696 1697 if (verbose == 0) 1698 return; 1699 if (rtm->rtm_version != RTM_VERSION) { 1700 (void)printf("routing message version %d not understood\n", 1701 rtm->rtm_version); 1702 return; 1703 } 1704 if (rtm->rtm_type < nitems(msgtypes)) 1705 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1706 else 1707 (void)printf("unknown type %d: ", rtm->rtm_type); 1708 (void)printf("len %d, ", rtm->rtm_msglen); 1709 1710 #define REQUIRE(x) do { \ 1711 if (msglen < sizeof(x)) \ 1712 goto badlen; \ 1713 else \ 1714 msglen -= sizeof(x); \ 1715 } while (0) 1716 1717 switch (rtm->rtm_type) { 1718 case RTM_IFINFO: 1719 REQUIRE(struct if_msghdr); 1720 ifm = (struct if_msghdr *)rtm; 1721 (void)printf("if# %d, ", ifm->ifm_index); 1722 switch (ifm->ifm_data.ifi_link_state) { 1723 case LINK_STATE_DOWN: 1724 state = "down"; 1725 break; 1726 case LINK_STATE_UP: 1727 state = "up"; 1728 break; 1729 default: 1730 state = "unknown"; 1731 break; 1732 } 1733 (void)printf("link: %s, flags:", state); 1734 printb(ifm->ifm_flags, ifnetflags); 1735 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1736 break; 1737 case RTM_NEWADDR: 1738 case RTM_DELADDR: 1739 REQUIRE(struct ifa_msghdr); 1740 ifam = (struct ifa_msghdr *)rtm; 1741 (void)printf("metric %d, flags:", ifam->ifam_metric); 1742 printb(ifam->ifam_flags, routeflags); 1743 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1744 break; 1745 #ifdef RTM_NEWMADDR 1746 case RTM_NEWMADDR: 1747 case RTM_DELMADDR: 1748 REQUIRE(struct ifma_msghdr); 1749 ifmam = (struct ifma_msghdr *)rtm; 1750 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1751 break; 1752 #endif 1753 case RTM_IFANNOUNCE: 1754 REQUIRE(struct if_announcemsghdr); 1755 ifan = (struct if_announcemsghdr *)rtm; 1756 (void)printf("if# %d, what: ", ifan->ifan_index); 1757 switch (ifan->ifan_what) { 1758 case IFAN_ARRIVAL: 1759 (void)printf("arrival"); 1760 break; 1761 case IFAN_DEPARTURE: 1762 printf("departure"); 1763 break; 1764 default: 1765 printf("#%d", ifan->ifan_what); 1766 break; 1767 } 1768 printf("\n"); 1769 fflush(stdout); 1770 break; 1771 1772 default: 1773 if (rtm->rtm_type <= RTM_RESOLVE) { 1774 printf("pid: %ld, seq %d, errno %d, flags:", 1775 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1776 printb(rtm->rtm_flags, routeflags); 1777 pmsg_common(rtm, msglen); 1778 } else 1779 printf("type: %u, len: %zu\n", rtm->rtm_type, msglen); 1780 } 1781 1782 return; 1783 1784 badlen: 1785 (void)printf(errfmt, __func__, msglen); 1786 #undef REQUIRE 1787 } 1788 1789 static void 1790 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1791 { 1792 struct sockaddr *sp[RTAX_MAX]; 1793 struct timespec ts; 1794 char *cp; 1795 int i; 1796 1797 memset(sp, 0, sizeof(sp)); 1798 (void)printf(" route to: %s\n", 1799 routename((struct sockaddr *)&so[RTAX_DST])); 1800 if (rtm->rtm_version != RTM_VERSION) { 1801 warnx("routing message version %d not understood", 1802 rtm->rtm_version); 1803 return; 1804 } 1805 if (rtm->rtm_msglen > msglen) { 1806 warnx("message length mismatch, in packet %d, returned %d", 1807 rtm->rtm_msglen, msglen); 1808 return; 1809 } 1810 if (rtm->rtm_errno) { 1811 errno = rtm->rtm_errno; 1812 warn("message indicates error %d", errno); 1813 return; 1814 } 1815 cp = ((char *)(rtm + 1)); 1816 for (i = 0; i < RTAX_MAX; i++) 1817 if (rtm->rtm_addrs & (1 << i)) { 1818 sp[i] = (struct sockaddr *)cp; 1819 cp += SA_SIZE((struct sockaddr *)cp); 1820 } 1821 if ((rtm->rtm_addrs & RTA_IFP) && 1822 (sp[RTAX_IFP]->sa_family != AF_LINK || 1823 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1824 sp[RTAX_IFP] = NULL; 1825 if (sp[RTAX_DST]) 1826 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1827 if (sp[RTAX_NETMASK]) 1828 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1829 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1830 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1831 if (fib >= 0) 1832 (void)printf(" fib: %u\n", (unsigned int)fib); 1833 if (sp[RTAX_IFP]) 1834 (void)printf(" interface: %.*s\n", 1835 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1836 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1837 (void)printf(" flags: "); 1838 printb(rtm->rtm_flags, routeflags); 1839 1840 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1841 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1842 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1843 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1844 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1845 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1846 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1847 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1848 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1849 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1850 if (rtm->rtm_rmx.rmx_expire > 0) 1851 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1852 else 1853 ts.tv_sec = 0; 1854 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1855 lock(EXPIRE)); 1856 #undef lock 1857 #undef msec 1858 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1859 if (verbose) 1860 pmsg_common(rtm, msglen); 1861 else if (rtm->rtm_addrs &~ RTA_IGN) { 1862 (void)printf("sockaddrs: "); 1863 printb(rtm->rtm_addrs, addrnames); 1864 putchar('\n'); 1865 } 1866 #undef RTA_IGN 1867 } 1868 1869 static void 1870 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1871 { 1872 1873 (void)printf("\nlocks: "); 1874 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1875 (void)printf(" inits: "); 1876 printb(rtm->rtm_inits, metricnames); 1877 if (msglen > sizeof(struct rt_msghdr)) 1878 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1879 msglen - sizeof(struct rt_msghdr)); 1880 else 1881 (void)fflush(stdout); 1882 } 1883 1884 static void 1885 pmsg_addrs(char *cp, int addrs, size_t len) 1886 { 1887 struct sockaddr *sa; 1888 int i; 1889 1890 if (addrs == 0) { 1891 (void)putchar('\n'); 1892 return; 1893 } 1894 (void)printf("\nsockaddrs: "); 1895 printb(addrs, addrnames); 1896 putchar('\n'); 1897 for (i = 0; i < RTAX_MAX; i++) 1898 if (addrs & (1 << i)) { 1899 sa = (struct sockaddr *)cp; 1900 if (len == 0 || len < SA_SIZE(sa)) { 1901 (void)printf(errfmt, __func__, len); 1902 break; 1903 } 1904 (void)printf(" %s", routename(sa)); 1905 len -= SA_SIZE(sa); 1906 cp += SA_SIZE(sa); 1907 } 1908 (void)putchar('\n'); 1909 (void)fflush(stdout); 1910 } 1911 1912 void 1913 printb(int b, const char *str) 1914 { 1915 int i; 1916 int gotsome = 0; 1917 1918 if (b == 0) 1919 return; 1920 while ((i = *str++) != 0) { 1921 if (b & (1 << (i-1))) { 1922 if (gotsome == 0) 1923 i = '<'; 1924 else 1925 i = ','; 1926 putchar(i); 1927 gotsome = 1; 1928 for (; (i = *str) > 32; str++) 1929 putchar(i); 1930 } else 1931 while (*str > 32) 1932 str++; 1933 } 1934 if (gotsome) 1935 putchar('>'); 1936 } 1937 1938 int 1939 keyword(const char *cp) 1940 { 1941 const struct keytab *kt = keywords; 1942 1943 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1944 kt++; 1945 return (kt->kt_i); 1946 } 1947 1948 static void 1949 sodump(struct sockaddr *sa, const char *which) 1950 { 1951 #ifdef INET6 1952 char nbuf[INET6_ADDRSTRLEN]; 1953 #endif 1954 1955 switch (sa->sa_family) { 1956 case AF_LINK: 1957 (void)printf("%s: link %s; ", which, 1958 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1959 break; 1960 #ifdef INET 1961 case AF_INET: 1962 (void)printf("%s: inet %s; ", which, 1963 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1964 break; 1965 #endif 1966 #ifdef INET6 1967 case AF_INET6: 1968 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1969 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1970 sizeof(nbuf))); 1971 break; 1972 #endif 1973 } 1974 (void)fflush(stdout); 1975 } 1976 1977 /* States*/ 1978 #define VIRGIN 0 1979 #define GOTONE 1 1980 #define GOTTWO 2 1981 /* Inputs */ 1982 #define DIGIT (4*0) 1983 #define END (4*1) 1984 #define DELIM (4*2) 1985 1986 static void 1987 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1988 { 1989 char *cp = (char *)sa; 1990 char *cplim = cp + size; 1991 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1992 1993 memset(cp, 0, size); 1994 cp++; 1995 do { 1996 if ((*addr >= '0') && (*addr <= '9')) { 1997 new = *addr - '0'; 1998 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1999 new = *addr - 'a' + 10; 2000 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2001 new = *addr - 'A' + 10; 2002 } else if (*addr == '\0') 2003 state |= END; 2004 else 2005 state |= DELIM; 2006 addr++; 2007 switch (state /* | INPUT */) { 2008 case GOTTWO | DIGIT: 2009 *cp++ = byte; /*FALLTHROUGH*/ 2010 case VIRGIN | DIGIT: 2011 state = GOTONE; byte = new; continue; 2012 case GOTONE | DIGIT: 2013 state = GOTTWO; byte = new + (byte << 4); continue; 2014 default: /* | DELIM */ 2015 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2016 case GOTONE | END: 2017 case GOTTWO | END: 2018 *cp++ = byte; /* FALLTHROUGH */ 2019 case VIRGIN | END: 2020 break; 2021 } 2022 break; 2023 } while (cp < cplim); 2024 sa->sa_len = cp - (char *)sa; 2025 } 2026