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 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include <sys/param.h> 48 #include <sys/file.h> 49 #include <sys/socket.h> 50 #include <sys/ioctl.h> 51 #include <sys/sysctl.h> 52 #include <sys/types.h> 53 #include <sys/queue.h> 54 55 #include <net/if.h> 56 #include <net/route.h> 57 #include <net/if_dl.h> 58 #include <netinet/in.h> 59 #include <netinet/if_ether.h> 60 #include <arpa/inet.h> 61 #include <netdb.h> 62 63 #include <ctype.h> 64 #include <err.h> 65 #include <errno.h> 66 #include <paths.h> 67 #include <signal.h> 68 #include <stdbool.h> 69 #include <stdio.h> 70 #include <stdlib.h> 71 #include <string.h> 72 #include <sysexits.h> 73 #include <time.h> 74 #include <unistd.h> 75 #include <ifaddrs.h> 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 int verbose, debugonly; 94 static struct sockaddr_storage so[RTAX_MAX]; 95 static int pid, rtm_addrs; 96 static int nflag, af, aflen, qflag, tflag; 97 static int locking, lockrest; 98 static struct rt_metrics rt_metrics; 99 static u_long rtm_inits; 100 static uid_t uid; 101 static int defaultfib; 102 static int numfibs; 103 static char domain[MAXHOSTNAMELEN + 1]; 104 static bool domain_initialized; 105 static char rt_line[NI_MAXHOST]; 106 static char net_line[MAXHOSTNAMELEN + 1]; 107 108 #ifdef WITHOUT_NETLINK 109 static int s; 110 static int rtm_seq; 111 112 static struct { 113 struct rt_msghdr m_rtm; 114 char m_space[512]; 115 } m_rtmsg; 116 117 static int rtmsg_rtsock(int, int, int); 118 static int flushroutes_fib_rtsock(int); 119 static void monitor_rtsock(void); 120 #else 121 int rtmsg_nl(int, int, int, int, struct sockaddr_storage *, struct rt_metrics *); 122 int flushroutes_fib_nl(int, int); 123 void monitor_nl(int); 124 #endif 125 126 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 127 128 void printb(int, const char *); 129 static void flushroutes(int argc, char *argv[]); 130 static int flushroutes_fib(int); 131 static int getaddr(int, char *, int); 132 static int keyword(const char *); 133 #ifdef INET 134 static void inet_makemask(struct sockaddr_in *, u_long); 135 #endif 136 #ifdef INET6 137 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 138 #endif 139 static void interfaces(void); 140 static void monitor(int, char*[]); 141 const char *netname(struct sockaddr *); 142 static void newroute(int, char **); 143 static int newroute_fib(int, char *, int); 144 static void pmsg_addrs(char *, int, size_t); 145 static void pmsg_common(struct rt_msghdr *, size_t); 146 static int prefixlen(const char *); 147 static void print_getmsg(struct rt_msghdr *, int, int); 148 static void print_rtmsg(struct rt_msghdr *, size_t); 149 const char *routename(struct sockaddr *); 150 static int rtmsg(int, int, int); 151 static void set_metric(char *, int); 152 static int set_sofib(int); 153 static void sockaddr(char *, struct sockaddr *, size_t); 154 static void sodump(struct sockaddr *, const char *); 155 static int fiboptlist_csv(const char *, struct fibl_head_t *); 156 static int fiboptlist_range(const char *, struct fibl_head_t *); 157 158 static void usage(const char *) __dead2; 159 160 #define READ_TIMEOUT 10 161 static volatile sig_atomic_t stop_read; 162 163 static void 164 stopit(int sig __unused) 165 { 166 167 stop_read = 1; 168 } 169 170 static void 171 usage(const char *cp) 172 { 173 if (cp != NULL) 174 warnx("bad keyword: %s", cp); 175 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 176 /* NOTREACHED */ 177 } 178 179 int 180 main(int argc, char **argv) 181 { 182 int ch; 183 size_t len; 184 185 if (argc < 2) 186 usage(NULL); 187 188 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 189 switch(ch) { 190 case '4': 191 #ifdef INET 192 af = AF_INET; 193 aflen = sizeof(struct sockaddr_in); 194 #else 195 errx(1, "IPv4 support is not compiled in"); 196 #endif 197 break; 198 case '6': 199 #ifdef INET6 200 af = AF_INET6; 201 aflen = sizeof(struct sockaddr_in6); 202 #else 203 errx(1, "IPv6 support is not compiled in"); 204 #endif 205 break; 206 case 'n': 207 nflag = 1; 208 break; 209 case 'q': 210 qflag = 1; 211 break; 212 case 'v': 213 verbose = 1; 214 break; 215 case 't': 216 tflag = 1; 217 break; 218 case 'd': 219 debugonly = 1; 220 break; 221 case '?': 222 default: 223 usage(NULL); 224 } 225 argc -= optind; 226 argv += optind; 227 228 pid = getpid(); 229 uid = geteuid(); 230 #ifdef WITHOUT_NETLINK 231 if (tflag) 232 s = open(_PATH_DEVNULL, O_WRONLY, 0); 233 else 234 s = socket(PF_ROUTE, SOCK_RAW, 0); 235 if (s < 0) 236 err(EX_OSERR, "socket"); 237 #endif 238 239 len = sizeof(numfibs); 240 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 241 numfibs = -1; 242 243 len = sizeof(defaultfib); 244 if (numfibs != -1 && 245 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 246 0) == -1) 247 defaultfib = -1; 248 249 if (*argv != NULL) 250 switch (keyword(*argv)) { 251 case K_GET: 252 case K_SHOW: 253 uid = 0; 254 /* FALLTHROUGH */ 255 256 case K_CHANGE: 257 case K_ADD: 258 case K_DEL: 259 case K_DELETE: 260 newroute(argc, argv); 261 /* NOTREACHED */ 262 263 case K_MONITOR: 264 monitor(argc, argv); 265 /* NOTREACHED */ 266 267 case K_FLUSH: 268 flushroutes(argc, argv); 269 exit(0); 270 /* NOTREACHED */ 271 } 272 usage(*argv); 273 /* NOTREACHED */ 274 } 275 276 static int 277 set_sofib(int fib) 278 { 279 280 #ifdef WITHOUT_NETLINK 281 if (fib < 0) 282 return (0); 283 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 284 sizeof(fib))); 285 #else 286 return (0); 287 #endif 288 } 289 290 static int 291 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 292 { 293 struct fibl *fl; 294 char *str0, *str, *token, *endptr; 295 int fib[2], i, error; 296 297 str0 = str = strdup(arg); 298 error = 0; 299 i = 0; 300 while ((token = strsep(&str, "-")) != NULL) { 301 switch (i) { 302 case 0: 303 case 1: 304 errno = 0; 305 fib[i] = strtol(token, &endptr, 0); 306 if (errno == 0) { 307 if (*endptr != '\0' || 308 fib[i] < 0 || 309 (numfibs != -1 && fib[i] > numfibs - 1)) 310 errno = EINVAL; 311 } 312 if (errno) 313 error = 1; 314 break; 315 default: 316 error = 1; 317 } 318 if (error) 319 goto fiboptlist_range_ret; 320 i++; 321 } 322 if (fib[0] >= fib[1]) { 323 error = 1; 324 goto fiboptlist_range_ret; 325 } 326 for (i = fib[0]; i <= fib[1]; i++) { 327 fl = calloc(1, sizeof(*fl)); 328 if (fl == NULL) { 329 error = 1; 330 goto fiboptlist_range_ret; 331 } 332 fl->fl_num = i; 333 TAILQ_INSERT_TAIL(flh, fl, fl_next); 334 } 335 fiboptlist_range_ret: 336 free(str0); 337 return (error); 338 } 339 340 #define ALLSTRLEN 64 341 static int 342 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 343 { 344 struct fibl *fl; 345 char *str0, *str, *token, *endptr; 346 int fib, error; 347 348 str0 = str = NULL; 349 if (strcmp("all", arg) == 0) { 350 str = calloc(1, ALLSTRLEN); 351 if (str == NULL) { 352 error = 1; 353 goto fiboptlist_csv_ret; 354 } 355 if (numfibs > 1) 356 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 357 else 358 snprintf(str, ALLSTRLEN - 1, "%d", 0); 359 } else if (strcmp("default", arg) == 0) { 360 str0 = str = calloc(1, ALLSTRLEN); 361 if (str == NULL) { 362 error = 1; 363 goto fiboptlist_csv_ret; 364 } 365 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 366 } else 367 str0 = str = strdup(arg); 368 369 error = 0; 370 while ((token = strsep(&str, ",")) != NULL) { 371 if (*token != '-' && strchr(token, '-') != NULL) { 372 error = fiboptlist_range(token, flh); 373 if (error) 374 goto fiboptlist_csv_ret; 375 } else { 376 errno = 0; 377 fib = strtol(token, &endptr, 0); 378 if (errno == 0) { 379 if (*endptr != '\0' || 380 fib < 0 || 381 (numfibs != -1 && fib > numfibs - 1)) 382 errno = EINVAL; 383 } 384 if (errno) { 385 error = 1; 386 goto fiboptlist_csv_ret; 387 } 388 fl = calloc(1, sizeof(*fl)); 389 if (fl == NULL) { 390 error = 1; 391 goto fiboptlist_csv_ret; 392 } 393 fl->fl_num = fib; 394 TAILQ_INSERT_TAIL(flh, fl, fl_next); 395 } 396 } 397 fiboptlist_csv_ret: 398 if (str0 != NULL) 399 free(str0); 400 return (error); 401 } 402 403 /* 404 * Purge all entries in the routing tables not 405 * associated with network interfaces. 406 */ 407 static void 408 flushroutes(int argc, char *argv[]) 409 { 410 struct fibl *fl; 411 int error; 412 413 if (uid != 0 && !debugonly && !tflag) 414 errx(EX_NOPERM, "must be root to alter routing table"); 415 #ifdef WITHOUT_NETLINK 416 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 417 #endif 418 419 TAILQ_INIT(&fibl_head); 420 while (argc > 1) { 421 argc--; 422 argv++; 423 if (**argv != '-') 424 usage(*argv); 425 switch (keyword(*argv + 1)) { 426 #ifdef INET 427 case K_4: 428 case K_INET: 429 af = AF_INET; 430 break; 431 #endif 432 #ifdef INET6 433 case K_6: 434 case K_INET6: 435 af = AF_INET6; 436 break; 437 #endif 438 case K_LINK: 439 af = AF_LINK; 440 break; 441 case K_FIB: 442 if (!--argc) 443 usage(*argv); 444 error = fiboptlist_csv(*++argv, &fibl_head); 445 if (error) 446 errx(EX_USAGE, "invalid fib number: %s", *argv); 447 break; 448 default: 449 usage(*argv); 450 } 451 } 452 if (TAILQ_EMPTY(&fibl_head)) { 453 error = fiboptlist_csv("default", &fibl_head); 454 if (error) 455 errx(EX_OSERR, "fiboptlist_csv failed."); 456 } 457 TAILQ_FOREACH(fl, &fibl_head, fl_next) 458 flushroutes_fib(fl->fl_num); 459 } 460 461 static int 462 flushroutes_fib(int fib) 463 { 464 #ifdef WITHOUT_NETLINK 465 return (flushroutes_fib_rtsock(fib)); 466 #else 467 return (flushroutes_fib_nl(fib, af)); 468 #endif 469 } 470 471 #ifdef WITHOUT_NETLINK 472 static int 473 flushroutes_fib_rtsock(int fib) 474 { 475 struct rt_msghdr *rtm; 476 size_t needed; 477 char *buf, *next, *lim; 478 int mib[7], rlen, seqno, count = 0; 479 int error; 480 481 error = set_sofib(fib); 482 if (error) { 483 warn("fib number %d is ignored", fib); 484 return (error); 485 } 486 487 retry: 488 mib[0] = CTL_NET; 489 mib[1] = PF_ROUTE; 490 mib[2] = 0; /* protocol */ 491 mib[3] = AF_UNSPEC; 492 mib[4] = NET_RT_DUMP; 493 mib[5] = 0; /* no flags */ 494 mib[6] = fib; 495 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 496 err(EX_OSERR, "route-sysctl-estimate"); 497 if ((buf = malloc(needed)) == NULL) 498 errx(EX_OSERR, "malloc failed"); 499 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 500 if (errno == ENOMEM && count++ < 10) { 501 warnx("Routing table grew, retrying"); 502 sleep(1); 503 free(buf); 504 goto retry; 505 } 506 err(EX_OSERR, "route-sysctl-get"); 507 } 508 lim = buf + needed; 509 if (verbose) 510 (void)printf("Examining routing table from sysctl\n"); 511 seqno = 0; /* ??? */ 512 for (next = buf; next < lim; next += rtm->rtm_msglen) { 513 rtm = (struct rt_msghdr *)(void *)next; 514 if (verbose) 515 print_rtmsg(rtm, rtm->rtm_msglen); 516 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 517 continue; 518 if (af != 0) { 519 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 520 521 if (sa->sa_family != af) 522 continue; 523 } 524 if (debugonly) 525 continue; 526 rtm->rtm_type = RTM_DELETE; 527 rtm->rtm_seq = seqno; 528 rlen = write(s, next, rtm->rtm_msglen); 529 if (rlen < 0 && errno == EPERM) 530 err(1, "write to routing socket"); 531 if (rlen < (int)rtm->rtm_msglen) { 532 warn("write to routing socket"); 533 (void)printf("got only %d for rlen\n", rlen); 534 free(buf); 535 goto retry; 536 break; 537 } 538 seqno++; 539 if (qflag) 540 continue; 541 if (verbose) 542 print_rtmsg(rtm, rlen); 543 else { 544 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 545 546 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 547 routename(sa) : netname(sa)); 548 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 549 printf("%-20.20s ", routename(sa)); 550 if (fib >= 0) 551 printf("-fib %-3d ", fib); 552 printf("done\n"); 553 } 554 } 555 free(buf); 556 return (error); 557 } 558 #endif 559 560 const char * 561 routename(struct sockaddr *sa) 562 { 563 struct sockaddr_dl *sdl; 564 const char *cp; 565 int n; 566 567 if (!domain_initialized) { 568 domain_initialized = true; 569 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 570 (cp = strchr(domain, '.'))) { 571 domain[MAXHOSTNAMELEN] = '\0'; 572 (void)strcpy(domain, cp + 1); 573 } else 574 domain[0] = '\0'; 575 } 576 577 /* If the address is zero-filled, use "default". */ 578 if (sa->sa_len == 0 && nflag == 0) 579 return ("default"); 580 #if defined(INET) || defined(INET6) 581 switch (sa->sa_family) { 582 #ifdef INET 583 case AF_INET: 584 /* If the address is zero-filled, use "default". */ 585 if (nflag == 0 && 586 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 587 INADDR_ANY) 588 return("default"); 589 break; 590 #endif 591 #ifdef INET6 592 case AF_INET6: 593 /* If the address is zero-filled, use "default". */ 594 if (nflag == 0 && 595 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 596 return("default"); 597 break; 598 #endif 599 } 600 #endif 601 602 switch (sa->sa_family) { 603 #if defined(INET) || defined(INET6) 604 #ifdef INET 605 case AF_INET: 606 #endif 607 #ifdef INET6 608 case AF_INET6: 609 #endif 610 { 611 struct sockaddr_storage ss; 612 int error; 613 char *p; 614 615 memset(&ss, 0, sizeof(ss)); 616 if (sa->sa_len == 0) 617 ss.ss_family = sa->sa_family; 618 else 619 memcpy(&ss, sa, sa->sa_len); 620 /* Expand sa->sa_len because it could be shortened. */ 621 if (sa->sa_family == AF_INET) 622 ss.ss_len = sizeof(struct sockaddr_in); 623 else if (sa->sa_family == AF_INET6) 624 ss.ss_len = sizeof(struct sockaddr_in6); 625 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 626 rt_line, sizeof(rt_line), NULL, 0, 627 (nflag == 0) ? 0 : NI_NUMERICHOST); 628 if (error) { 629 warnx("getnameinfo(): %s", gai_strerror(error)); 630 strncpy(rt_line, "invalid", sizeof(rt_line)); 631 } 632 633 /* Remove the domain part if any. */ 634 p = strchr(rt_line, '.'); 635 if (p != NULL && strcmp(p + 1, domain) == 0) 636 *p = '\0'; 637 638 return (rt_line); 639 break; 640 } 641 #endif 642 case AF_LINK: 643 sdl = (struct sockaddr_dl *)(void *)sa; 644 645 if (sdl->sdl_nlen == 0 && 646 sdl->sdl_alen == 0 && 647 sdl->sdl_slen == 0) { 648 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 649 sdl->sdl_index); 650 if (n > (int)sizeof(rt_line)) 651 rt_line[0] = '\0'; 652 return (rt_line); 653 } else 654 return (link_ntoa(sdl)); 655 break; 656 657 default: 658 { 659 u_short *sp = (u_short *)(void *)sa; 660 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 661 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 662 char *cpe = rt_line + sizeof(rt_line); 663 664 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 665 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 666 cps += n; 667 else 668 *cps = '\0'; 669 break; 670 } 671 } 672 return (rt_line); 673 } 674 675 /* 676 * Return the name of the network whose address is given. 677 * The address is assumed to be that of a net, not a host. 678 */ 679 const char * 680 netname(struct sockaddr *sa) 681 { 682 struct sockaddr_dl *sdl; 683 int n; 684 #ifdef INET 685 struct netent *np = NULL; 686 const char *cp = NULL; 687 u_long i; 688 #endif 689 690 switch (sa->sa_family) { 691 #ifdef INET 692 case AF_INET: 693 { 694 struct in_addr in; 695 696 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 697 i = in.s_addr = ntohl(in.s_addr); 698 if (in.s_addr == 0) 699 cp = "default"; 700 else if (!nflag) { 701 np = getnetbyaddr(i, AF_INET); 702 if (np != NULL) 703 cp = np->n_name; 704 } 705 #define C(x) (unsigned)((x) & 0xff) 706 if (cp != NULL) 707 strncpy(net_line, cp, sizeof(net_line)); 708 else if ((in.s_addr & 0xffffff) == 0) 709 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 710 else if ((in.s_addr & 0xffff) == 0) 711 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 712 C(in.s_addr >> 16)); 713 else if ((in.s_addr & 0xff) == 0) 714 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 715 C(in.s_addr >> 16), C(in.s_addr >> 8)); 716 else 717 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 718 C(in.s_addr >> 16), C(in.s_addr >> 8), 719 C(in.s_addr)); 720 #undef C 721 break; 722 } 723 #endif 724 #ifdef INET6 725 case AF_INET6: 726 { 727 struct sockaddr_in6 sin6; 728 int niflags = 0; 729 730 memset(&sin6, 0, sizeof(sin6)); 731 memcpy(&sin6, sa, sa->sa_len); 732 sin6.sin6_len = sizeof(sin6); 733 sin6.sin6_family = AF_INET6; 734 if (nflag) 735 niflags |= NI_NUMERICHOST; 736 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 737 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 738 strncpy(net_line, "invalid", sizeof(net_line)); 739 740 return(net_line); 741 } 742 #endif 743 case AF_LINK: 744 sdl = (struct sockaddr_dl *)(void *)sa; 745 746 if (sdl->sdl_nlen == 0 && 747 sdl->sdl_alen == 0 && 748 sdl->sdl_slen == 0) { 749 n = snprintf(net_line, sizeof(net_line), "link#%d", 750 sdl->sdl_index); 751 if (n > (int)sizeof(net_line)) 752 net_line[0] = '\0'; 753 return (net_line); 754 } else 755 return (link_ntoa(sdl)); 756 break; 757 758 default: 759 { 760 u_short *sp = (u_short *)(void *)sa->sa_data; 761 u_short *splim = sp + ((sa->sa_len + 1)>>1); 762 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 763 char *cpe = net_line + sizeof(net_line); 764 765 while (sp < splim && cps < cpe) 766 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 767 cps += n; 768 else 769 *cps = '\0'; 770 break; 771 } 772 } 773 return (net_line); 774 } 775 776 static void 777 set_metric(char *value, int key) 778 { 779 int flag = 0; 780 char *endptr; 781 u_long noval, *valp = &noval; 782 783 switch (key) { 784 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 785 caseof(K_MTU, RTV_MTU, rmx_mtu); 786 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 787 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 788 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 789 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 790 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 791 caseof(K_RTT, RTV_RTT, rmx_rtt); 792 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 793 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 794 } 795 rtm_inits |= flag; 796 if (lockrest || locking) 797 rt_metrics.rmx_locks |= flag; 798 if (locking) 799 locking = 0; 800 errno = 0; 801 *valp = strtol(value, &endptr, 0); 802 if (errno == 0 && *endptr != '\0') 803 errno = EINVAL; 804 if (errno) 805 err(EX_USAGE, "%s", value); 806 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 807 struct timespec ts; 808 809 clock_gettime(CLOCK_REALTIME_FAST, &ts); 810 *valp += ts.tv_sec; 811 } 812 } 813 814 #define F_ISHOST 0x01 815 #define F_FORCENET 0x02 816 #define F_FORCEHOST 0x04 817 #define F_PROXY 0x08 818 #define F_INTERFACE 0x10 819 820 static void 821 newroute(int argc, char **argv) 822 { 823 struct sigaction sa; 824 struct fibl *fl; 825 char *cmd; 826 const char *dest, *gateway, *errmsg; 827 int key, error, flags, nrflags, fibnum; 828 829 if (uid != 0 && !debugonly && !tflag) 830 errx(EX_NOPERM, "must be root to alter routing table"); 831 dest = NULL; 832 gateway = NULL; 833 flags = RTF_STATIC; 834 nrflags = 0; 835 TAILQ_INIT(&fibl_head); 836 837 sigemptyset(&sa.sa_mask); 838 sa.sa_flags = 0; 839 sa.sa_handler = stopit; 840 if (sigaction(SIGALRM, &sa, 0) == -1) 841 warn("sigaction SIGALRM"); 842 843 cmd = argv[0]; 844 #ifdef WITHOUT_NETLINK 845 if (*cmd != 'g' && *cmd != 's') 846 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 847 #endif 848 while (--argc > 0) { 849 if (**(++argv)== '-') { 850 switch (key = keyword(1 + *argv)) { 851 case K_LINK: 852 af = AF_LINK; 853 aflen = sizeof(struct sockaddr_dl); 854 break; 855 #ifdef INET 856 case K_4: 857 case K_INET: 858 af = AF_INET; 859 aflen = sizeof(struct sockaddr_in); 860 break; 861 #endif 862 #ifdef INET6 863 case K_6: 864 case K_INET6: 865 af = AF_INET6; 866 aflen = sizeof(struct sockaddr_in6); 867 break; 868 #endif 869 case K_SA: 870 af = PF_ROUTE; 871 aflen = sizeof(struct sockaddr_storage); 872 break; 873 case K_IFACE: 874 case K_INTERFACE: 875 nrflags |= F_INTERFACE; 876 break; 877 case K_NOSTATIC: 878 flags &= ~RTF_STATIC; 879 break; 880 case K_LOCK: 881 locking = 1; 882 break; 883 case K_LOCKREST: 884 lockrest = 1; 885 break; 886 case K_HOST: 887 nrflags |= F_FORCEHOST; 888 break; 889 case K_REJECT: 890 flags |= RTF_REJECT; 891 break; 892 case K_BLACKHOLE: 893 flags |= RTF_BLACKHOLE; 894 break; 895 case K_PROTO1: 896 flags |= RTF_PROTO1; 897 break; 898 case K_PROTO2: 899 flags |= RTF_PROTO2; 900 break; 901 case K_PROXY: 902 nrflags |= F_PROXY; 903 break; 904 case K_XRESOLVE: 905 flags |= RTF_XRESOLVE; 906 break; 907 case K_STATIC: 908 flags |= RTF_STATIC; 909 break; 910 case K_STICKY: 911 flags |= RTF_STICKY; 912 break; 913 case K_NOSTICK: 914 flags &= ~RTF_STICKY; 915 break; 916 case K_FIB: 917 if (!--argc) 918 usage(NULL); 919 error = fiboptlist_csv(*++argv, &fibl_head); 920 if (error) 921 errx(EX_USAGE, 922 "invalid fib number: %s", *argv); 923 break; 924 case K_IFA: 925 if (!--argc) 926 usage(NULL); 927 getaddr(RTAX_IFA, *++argv, nrflags); 928 break; 929 case K_IFP: 930 if (!--argc) 931 usage(NULL); 932 getaddr(RTAX_IFP, *++argv, nrflags); 933 break; 934 case K_GENMASK: 935 if (!--argc) 936 usage(NULL); 937 getaddr(RTAX_GENMASK, *++argv, nrflags); 938 break; 939 case K_GATEWAY: 940 if (!--argc) 941 usage(NULL); 942 getaddr(RTAX_GATEWAY, *++argv, nrflags); 943 gateway = *argv; 944 break; 945 case K_DST: 946 if (!--argc) 947 usage(NULL); 948 if (getaddr(RTAX_DST, *++argv, nrflags)) 949 nrflags |= F_ISHOST; 950 dest = *argv; 951 break; 952 case K_NETMASK: 953 if (!--argc) 954 usage(NULL); 955 getaddr(RTAX_NETMASK, *++argv, nrflags); 956 /* FALLTHROUGH */ 957 case K_NET: 958 nrflags |= F_FORCENET; 959 break; 960 case K_PREFIXLEN: 961 if (!--argc) 962 usage(NULL); 963 if (prefixlen(*++argv) == -1) { 964 nrflags &= ~F_FORCENET; 965 nrflags |= F_ISHOST; 966 } else { 967 nrflags |= F_FORCENET; 968 nrflags &= ~F_ISHOST; 969 } 970 break; 971 case K_MTU: 972 case K_HOPCOUNT: 973 case K_EXPIRE: 974 case K_RECVPIPE: 975 case K_SENDPIPE: 976 case K_SSTHRESH: 977 case K_RTT: 978 case K_RTTVAR: 979 case K_WEIGHT: 980 if (!--argc) 981 usage(NULL); 982 set_metric(*++argv, key); 983 break; 984 default: 985 usage(1+*argv); 986 } 987 } else { 988 if ((rtm_addrs & RTA_DST) == 0) { 989 dest = *argv; 990 if (getaddr(RTAX_DST, *argv, nrflags)) 991 nrflags |= F_ISHOST; 992 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 993 gateway = *argv; 994 getaddr(RTAX_GATEWAY, *argv, nrflags); 995 } else { 996 getaddr(RTAX_NETMASK, *argv, nrflags); 997 nrflags |= F_FORCENET; 998 } 999 } 1000 } 1001 1002 /* Do some sanity checks on resulting request */ 1003 if (so[RTAX_DST].ss_len == 0) { 1004 warnx("destination parameter required"); 1005 usage(NULL); 1006 } 1007 1008 if (so[RTAX_NETMASK].ss_len != 0 && 1009 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 1010 warnx("destination and netmask family need to be the same"); 1011 usage(NULL); 1012 } 1013 1014 if (nrflags & F_FORCEHOST) { 1015 nrflags |= F_ISHOST; 1016 #ifdef INET6 1017 if (af == AF_INET6) { 1018 rtm_addrs &= ~RTA_NETMASK; 1019 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 1020 } 1021 #endif 1022 } 1023 if (nrflags & F_FORCENET) 1024 nrflags &= ~F_ISHOST; 1025 flags |= RTF_UP; 1026 if (nrflags & F_ISHOST) 1027 flags |= RTF_HOST; 1028 if ((nrflags & F_INTERFACE) == 0) 1029 flags |= RTF_GATEWAY; 1030 if (nrflags & F_PROXY) 1031 flags |= RTF_ANNOUNCE; 1032 if (dest == NULL) 1033 dest = ""; 1034 if (gateway == NULL) 1035 gateway = ""; 1036 1037 if (TAILQ_EMPTY(&fibl_head)) { 1038 error = fiboptlist_csv("default", &fibl_head); 1039 if (error) 1040 errx(EX_OSERR, "fiboptlist_csv failed."); 1041 } 1042 error = 0; 1043 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1044 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1045 if (fl->fl_error) 1046 fl->fl_errno = errno; 1047 error += fl->fl_error; 1048 } 1049 if (*cmd == 'g' || *cmd == 's') 1050 exit(error); 1051 1052 error = 0; 1053 if (!qflag) { 1054 fibnum = 0; 1055 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1056 if (fl->fl_error == 0) 1057 fibnum++; 1058 } 1059 if (fibnum > 0) { 1060 int firstfib = 1; 1061 1062 printf("%s %s %s", cmd, 1063 (nrflags & F_ISHOST) ? "host" : "net", dest); 1064 if (*gateway) 1065 printf(": gateway %s", gateway); 1066 1067 if (numfibs > 1) { 1068 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1069 if (fl->fl_error == 0 1070 && fl->fl_num >= 0) { 1071 if (firstfib) { 1072 printf(" fib "); 1073 firstfib = 0; 1074 } 1075 printf("%d", fl->fl_num); 1076 if (fibnum-- > 1) 1077 printf(","); 1078 } 1079 } 1080 } 1081 printf("\n"); 1082 } 1083 } 1084 1085 fibnum = 0; 1086 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1087 if (fl->fl_error != 0) { 1088 error = 1; 1089 if (!qflag) { 1090 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1091 ? "host" : "net", dest); 1092 if (*gateway) 1093 printf(": gateway %s", gateway); 1094 1095 if (fl->fl_num >= 0) 1096 printf(" fib %d", fl->fl_num); 1097 1098 switch (fl->fl_errno) { 1099 case ESRCH: 1100 errmsg = "not in table"; 1101 break; 1102 case EBUSY: 1103 errmsg = "entry in use"; 1104 break; 1105 case ENOBUFS: 1106 errmsg = "not enough memory"; 1107 break; 1108 case EADDRINUSE: 1109 /* 1110 * handle recursion avoidance 1111 * in rt_setgate() 1112 */ 1113 errmsg = "gateway uses the same route"; 1114 break; 1115 case EEXIST: 1116 errmsg = "route already in table"; 1117 break; 1118 default: 1119 errmsg = strerror(fl->fl_errno); 1120 break; 1121 } 1122 printf(": %s\n", errmsg); 1123 } 1124 } 1125 } 1126 exit(error); 1127 } 1128 1129 static int 1130 newroute_fib(int fib, char *cmd, int flags) 1131 { 1132 int error; 1133 1134 error = set_sofib(fib); 1135 if (error) { 1136 warn("fib number %d is ignored", fib); 1137 return (error); 1138 } 1139 1140 error = rtmsg(*cmd, flags, fib); 1141 return (error); 1142 } 1143 1144 #ifdef INET 1145 static void 1146 inet_makemask(struct sockaddr_in *sin_mask, u_long bits) 1147 { 1148 u_long mask = 0; 1149 1150 rtm_addrs |= RTA_NETMASK; 1151 1152 if (bits != 0) 1153 mask = 0xffffffff << (32 - bits); 1154 1155 sin_mask->sin_addr.s_addr = htonl(mask); 1156 sin_mask->sin_len = sizeof(struct sockaddr_in); 1157 sin_mask->sin_family = AF_INET; 1158 } 1159 #endif 1160 1161 #ifdef INET6 1162 /* 1163 * XXX the function may need more improvement... 1164 */ 1165 static int 1166 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1167 { 1168 1169 if (plen == NULL) { 1170 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1171 sin6->sin6_scope_id == 0) 1172 plen = "0"; 1173 } 1174 1175 if (plen == NULL || strcmp(plen, "128") == 0) 1176 return (1); 1177 rtm_addrs |= RTA_NETMASK; 1178 prefixlen(plen); 1179 return (0); 1180 } 1181 #endif 1182 1183 /* 1184 * Interpret an argument as a network address of some kind, 1185 * returning 1 if a host address, 0 if a network address. 1186 */ 1187 static int 1188 getaddr(int idx, char *str, int nrflags) 1189 { 1190 struct sockaddr *sa; 1191 #if defined(INET) 1192 struct sockaddr_in *sin; 1193 struct hostent *hp; 1194 char *q; 1195 #elif defined(INET6) 1196 char *q; 1197 #endif 1198 1199 if (idx < 0 || idx >= RTAX_MAX) 1200 usage("internal error"); 1201 if (af == 0) { 1202 #if defined(INET) 1203 af = AF_INET; 1204 aflen = sizeof(struct sockaddr_in); 1205 #elif defined(INET6) 1206 af = AF_INET6; 1207 aflen = sizeof(struct sockaddr_in6); 1208 #else 1209 af = AF_LINK; 1210 aflen = sizeof(struct sockaddr_dl); 1211 #endif 1212 } 1213 rtm_addrs |= (1 << idx); 1214 sa = (struct sockaddr *)&so[idx]; 1215 sa->sa_family = af; 1216 sa->sa_len = aflen; 1217 1218 switch (idx) { 1219 case RTAX_GATEWAY: 1220 if (nrflags & F_INTERFACE) { 1221 struct ifaddrs *ifap, *ifa; 1222 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1223 struct sockaddr_dl *sdl = NULL; 1224 1225 if (getifaddrs(&ifap)) 1226 err(EX_OSERR, "getifaddrs"); 1227 1228 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1229 if (ifa->ifa_addr->sa_family != AF_LINK) 1230 continue; 1231 1232 if (strcmp(str, ifa->ifa_name) != 0) 1233 continue; 1234 1235 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1236 } 1237 /* If we found it, then use it */ 1238 if (sdl != NULL) { 1239 /* 1240 * Note that we need to copy before calling 1241 * freeifaddrs(). 1242 */ 1243 memcpy(sdl0, sdl, sdl->sdl_len); 1244 } 1245 freeifaddrs(ifap); 1246 if (sdl != NULL) 1247 return(1); 1248 else 1249 errx(EX_DATAERR, 1250 "interface '%s' does not exist", str); 1251 } 1252 break; 1253 case RTAX_IFP: 1254 sa->sa_family = AF_LINK; 1255 break; 1256 } 1257 if (strcmp(str, "default") == 0) { 1258 /* 1259 * Default is net 0.0.0.0/0 1260 */ 1261 switch (idx) { 1262 case RTAX_DST: 1263 nrflags |= F_FORCENET; 1264 getaddr(RTAX_NETMASK, str, nrflags); 1265 break; 1266 } 1267 return (0); 1268 } 1269 switch (sa->sa_family) { 1270 #ifdef INET6 1271 case AF_INET6: 1272 { 1273 struct addrinfo hints, *res; 1274 int ecode; 1275 1276 q = NULL; 1277 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1278 *q = '\0'; 1279 memset(&hints, 0, sizeof(hints)); 1280 hints.ai_family = sa->sa_family; 1281 hints.ai_socktype = SOCK_DGRAM; 1282 ecode = getaddrinfo(str, NULL, &hints, &res); 1283 if (ecode != 0 || res->ai_family != AF_INET6 || 1284 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1285 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1286 memcpy(sa, res->ai_addr, res->ai_addrlen); 1287 freeaddrinfo(res); 1288 if (q != NULL) 1289 *q++ = '/'; 1290 if (idx == RTAX_DST) 1291 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1292 return (0); 1293 } 1294 #endif /* INET6 */ 1295 case AF_LINK: 1296 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1297 return (1); 1298 1299 case PF_ROUTE: 1300 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1301 return (1); 1302 #ifdef INET 1303 case AF_INET: 1304 #endif 1305 default: 1306 break; 1307 } 1308 1309 #ifdef INET 1310 sin = (struct sockaddr_in *)(void *)sa; 1311 1312 q = strchr(str,'/'); 1313 if (q != NULL && idx == RTAX_DST) { 1314 /* A.B.C.D/NUM */ 1315 *q = '\0'; 1316 if (inet_aton(str, &sin->sin_addr) == 0) 1317 errx(EX_NOHOST, "bad address: %s", str); 1318 1319 int masklen = strtol(q + 1, NULL, 10); 1320 if (masklen < 0 || masklen > 32) 1321 errx(EX_NOHOST, "bad mask length: %s", q + 1); 1322 1323 inet_makemask((struct sockaddr_in *)&so[RTAX_NETMASK],masklen); 1324 return (0); 1325 } 1326 if (inet_aton(str, &sin->sin_addr) != 0) 1327 return (1); 1328 1329 hp = gethostbyname(str); 1330 if (hp != NULL) { 1331 sin->sin_family = hp->h_addrtype; 1332 memmove((char *)&sin->sin_addr, hp->h_addr, 1333 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1334 return (1); 1335 } 1336 #endif 1337 errx(EX_NOHOST, "bad address: %s", str); 1338 } 1339 1340 static int 1341 prefixlen(const char *str) 1342 { 1343 int len = atoi(str), q, r; 1344 int max; 1345 char *p; 1346 1347 rtm_addrs |= RTA_NETMASK; 1348 switch (af) { 1349 #ifdef INET6 1350 case AF_INET6: 1351 { 1352 struct sockaddr_in6 *sin6 = 1353 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1354 1355 max = 128; 1356 p = (char *)&sin6->sin6_addr; 1357 sin6->sin6_family = AF_INET6; 1358 sin6->sin6_len = sizeof(*sin6); 1359 break; 1360 } 1361 #endif 1362 #ifdef INET 1363 case AF_INET: 1364 { 1365 struct sockaddr_in *sin = 1366 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1367 1368 max = 32; 1369 p = (char *)&sin->sin_addr; 1370 sin->sin_family = AF_INET; 1371 sin->sin_len = sizeof(*sin); 1372 break; 1373 } 1374 #endif 1375 default: 1376 errx(EX_OSERR, "prefixlen not supported in this af"); 1377 } 1378 1379 if (len < 0 || max < len) 1380 errx(EX_USAGE, "%s: invalid prefixlen", str); 1381 1382 q = len >> 3; 1383 r = len & 7; 1384 memset((void *)p, 0, max / 8); 1385 if (q > 0) 1386 memset((void *)p, 0xff, q); 1387 if (r > 0) 1388 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1389 if (len == max) 1390 return (-1); 1391 else 1392 return (len); 1393 } 1394 1395 static void 1396 interfaces(void) 1397 { 1398 size_t needed; 1399 int mib[6]; 1400 char *buf, *lim, *next, count = 0; 1401 struct rt_msghdr *rtm; 1402 1403 retry2: 1404 mib[0] = CTL_NET; 1405 mib[1] = PF_ROUTE; 1406 mib[2] = 0; /* protocol */ 1407 mib[3] = AF_UNSPEC; 1408 mib[4] = NET_RT_IFLIST; 1409 mib[5] = 0; /* no flags */ 1410 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1411 err(EX_OSERR, "route-sysctl-estimate"); 1412 if ((buf = malloc(needed)) == NULL) 1413 errx(EX_OSERR, "malloc failed"); 1414 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1415 if (errno == ENOMEM && count++ < 10) { 1416 warnx("Routing table grew, retrying"); 1417 sleep(1); 1418 free(buf); 1419 goto retry2; 1420 } 1421 err(EX_OSERR, "actual retrieval of interface table"); 1422 } 1423 lim = buf + needed; 1424 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1425 rtm = (struct rt_msghdr *)(void *)next; 1426 print_rtmsg(rtm, rtm->rtm_msglen); 1427 } 1428 free(buf); 1429 } 1430 1431 static void 1432 monitor(int argc, char *argv[]) 1433 { 1434 int fib, error; 1435 char *endptr; 1436 1437 fib = defaultfib; 1438 while (argc > 1) { 1439 argc--; 1440 argv++; 1441 if (**argv != '-') 1442 usage(*argv); 1443 switch (keyword(*argv + 1)) { 1444 case K_FIB: 1445 if (!--argc) 1446 usage(*argv); 1447 errno = 0; 1448 fib = strtol(*++argv, &endptr, 0); 1449 if (errno == 0) { 1450 if (*endptr != '\0' || 1451 fib < 0 || 1452 (numfibs != -1 && fib > numfibs - 1)) 1453 errno = EINVAL; 1454 } 1455 if (errno) 1456 errx(EX_USAGE, "invalid fib number: %s", *argv); 1457 break; 1458 default: 1459 usage(*argv); 1460 } 1461 } 1462 error = set_sofib(fib); 1463 if (error) 1464 errx(EX_USAGE, "invalid fib number: %d", fib); 1465 1466 verbose = 1; 1467 if (debugonly) { 1468 interfaces(); 1469 exit(0); 1470 } 1471 #ifdef WITHOUT_NETLINK 1472 monitor_rtsock(); 1473 #else 1474 monitor_nl(fib); 1475 #endif 1476 } 1477 1478 #ifdef WITHOUT_NETLINK 1479 static void 1480 monitor_rtsock(void) 1481 { 1482 char msg[2048]; 1483 int n; 1484 1485 #ifdef SO_RERROR 1486 n = 1; 1487 if (setsockopt(s, SOL_SOCKET, SO_RERROR, &n, sizeof(n)) == -1) 1488 warn("SO_RERROR"); 1489 #endif 1490 1491 for (;;) { 1492 time_t now; 1493 n = read(s, msg, sizeof(msg)); 1494 if (n == -1) { 1495 warn("read"); 1496 continue; 1497 } 1498 now = time(NULL); 1499 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1500 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1501 } 1502 } 1503 #endif 1504 1505 static int 1506 rtmsg(int cmd, int flags, int fib) 1507 { 1508 errno = 0; 1509 if (cmd == 'a') 1510 cmd = RTM_ADD; 1511 else if (cmd == 'c') 1512 cmd = RTM_CHANGE; 1513 else if (cmd == 'g' || cmd == 's') { 1514 cmd = RTM_GET; 1515 if (so[RTAX_IFP].ss_family == 0) { 1516 so[RTAX_IFP].ss_family = AF_LINK; 1517 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1518 rtm_addrs |= RTA_IFP; 1519 } 1520 } else { 1521 cmd = RTM_DELETE; 1522 flags |= RTF_PINNED; 1523 } 1524 #ifdef WITHOUT_NETLINK 1525 return (rtmsg_rtsock(cmd, flags, fib)); 1526 #else 1527 errno = rtmsg_nl(cmd, flags, fib, rtm_addrs, so, &rt_metrics); 1528 return (errno == 0 ? 0 : -1); 1529 #endif 1530 } 1531 1532 #ifdef WITHOUT_NETLINK 1533 static int 1534 rtmsg_rtsock(int cmd, int flags, int fib) 1535 { 1536 int rlen; 1537 char *cp = m_rtmsg.m_space; 1538 int l; 1539 1540 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1541 1542 #define NEXTADDR(w, u) \ 1543 if (rtm_addrs & (w)) { \ 1544 l = SA_SIZE(&(u)); \ 1545 memmove(cp, (char *)&(u), l); \ 1546 cp += l; \ 1547 if (verbose) \ 1548 sodump((struct sockaddr *)&(u), #w); \ 1549 } 1550 1551 #define rtm m_rtmsg.m_rtm 1552 rtm.rtm_type = cmd; 1553 rtm.rtm_flags = flags; 1554 rtm.rtm_version = RTM_VERSION; 1555 rtm.rtm_seq = ++rtm_seq; 1556 rtm.rtm_addrs = rtm_addrs; 1557 rtm.rtm_rmx = rt_metrics; 1558 rtm.rtm_inits = rtm_inits; 1559 1560 NEXTADDR(RTA_DST, so[RTAX_DST]); 1561 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1562 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1563 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1564 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1565 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1566 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1567 if (verbose) 1568 print_rtmsg(&rtm, l); 1569 if (debugonly) 1570 return (0); 1571 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1572 switch (errno) { 1573 case EPERM: 1574 err(1, "writing to routing socket"); 1575 break; 1576 case ESRCH: 1577 warnx("route has not been found"); 1578 break; 1579 case EEXIST: 1580 /* Handled by newroute() */ 1581 break; 1582 default: 1583 warn("writing to routing socket"); 1584 } 1585 return (-1); 1586 } 1587 if (cmd == RTM_GET) { 1588 stop_read = 0; 1589 alarm(READ_TIMEOUT); 1590 do { 1591 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1592 } while (l > 0 && stop_read == 0 && 1593 (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq || 1594 rtm.rtm_pid != pid)); 1595 if (stop_read != 0) { 1596 warnx("read from routing socket timed out"); 1597 return (-1); 1598 } else 1599 alarm(0); 1600 if (l < 0) 1601 warn("read from routing socket"); 1602 else 1603 print_getmsg(&rtm, l, fib); 1604 } 1605 #undef rtm 1606 return (0); 1607 } 1608 #endif 1609 1610 static const char *const msgtypes[] = { 1611 "", 1612 "RTM_ADD: Add Route", 1613 "RTM_DELETE: Delete Route", 1614 "RTM_CHANGE: Change Metrics or flags", 1615 "RTM_GET: Report Metrics", 1616 "RTM_LOSING: Kernel Suspects Partitioning", 1617 "RTM_REDIRECT: Told to use different route", 1618 "RTM_MISS: Lookup failed on this address", 1619 "RTM_LOCK: fix specified metrics", 1620 "RTM_OLDADD: caused by SIOCADDRT", 1621 "RTM_OLDDEL: caused by SIOCDELRT", 1622 "RTM_RESOLVE: Route created by cloning", 1623 "RTM_NEWADDR: address being added to iface", 1624 "RTM_DELADDR: address being removed from iface", 1625 "RTM_IFINFO: iface status change", 1626 "RTM_NEWMADDR: new multicast group membership on iface", 1627 "RTM_DELMADDR: multicast group membership removed from iface", 1628 "RTM_IFANNOUNCE: interface arrival/departure", 1629 "RTM_IEEE80211: IEEE 802.11 wireless event", 1630 }; 1631 1632 static const char metricnames[] = 1633 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1634 "\1mtu"; 1635 const char routeflags[] = 1636 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1637 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1638 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1639 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1640 static const char ifnetflags[] = 1641 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1642 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1643 "\017LINK2\020MULTICAST"; 1644 static const char addrnames[] = 1645 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1646 1647 static const char errfmt[] = 1648 "\n%s: truncated route message, only %zu bytes left\n"; 1649 1650 static void 1651 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1652 { 1653 struct if_msghdr *ifm; 1654 struct ifa_msghdr *ifam; 1655 #ifdef RTM_NEWMADDR 1656 struct ifma_msghdr *ifmam; 1657 #endif 1658 struct if_announcemsghdr *ifan; 1659 const char *state; 1660 1661 if (verbose == 0) 1662 return; 1663 if (rtm->rtm_version != RTM_VERSION) { 1664 (void)printf("routing message version %d not understood\n", 1665 rtm->rtm_version); 1666 return; 1667 } 1668 if (rtm->rtm_type < nitems(msgtypes)) 1669 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1670 else 1671 (void)printf("unknown type %d: ", rtm->rtm_type); 1672 (void)printf("len %d, ", rtm->rtm_msglen); 1673 1674 #define REQUIRE(x) do { \ 1675 if (msglen < sizeof(x)) \ 1676 goto badlen; \ 1677 else \ 1678 msglen -= sizeof(x); \ 1679 } while (0) 1680 1681 switch (rtm->rtm_type) { 1682 case RTM_IFINFO: 1683 REQUIRE(struct if_msghdr); 1684 ifm = (struct if_msghdr *)rtm; 1685 (void)printf("if# %d, ", ifm->ifm_index); 1686 switch (ifm->ifm_data.ifi_link_state) { 1687 case LINK_STATE_DOWN: 1688 state = "down"; 1689 break; 1690 case LINK_STATE_UP: 1691 state = "up"; 1692 break; 1693 default: 1694 state = "unknown"; 1695 break; 1696 } 1697 (void)printf("link: %s, flags:", state); 1698 printb(ifm->ifm_flags, ifnetflags); 1699 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1700 break; 1701 case RTM_NEWADDR: 1702 case RTM_DELADDR: 1703 REQUIRE(struct ifa_msghdr); 1704 ifam = (struct ifa_msghdr *)rtm; 1705 (void)printf("metric %d, flags:", ifam->ifam_metric); 1706 printb(ifam->ifam_flags, routeflags); 1707 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1708 break; 1709 #ifdef RTM_NEWMADDR 1710 case RTM_NEWMADDR: 1711 case RTM_DELMADDR: 1712 REQUIRE(struct ifma_msghdr); 1713 ifmam = (struct ifma_msghdr *)rtm; 1714 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1715 break; 1716 #endif 1717 case RTM_IFANNOUNCE: 1718 REQUIRE(struct if_announcemsghdr); 1719 ifan = (struct if_announcemsghdr *)rtm; 1720 (void)printf("if# %d, what: ", ifan->ifan_index); 1721 switch (ifan->ifan_what) { 1722 case IFAN_ARRIVAL: 1723 (void)printf("arrival"); 1724 break; 1725 case IFAN_DEPARTURE: 1726 printf("departure"); 1727 break; 1728 default: 1729 printf("#%d", ifan->ifan_what); 1730 break; 1731 } 1732 printf("\n"); 1733 fflush(stdout); 1734 break; 1735 1736 default: 1737 if (rtm->rtm_type <= RTM_RESOLVE) { 1738 printf("pid: %ld, seq %d, errno %d, flags:", 1739 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1740 printb(rtm->rtm_flags, routeflags); 1741 pmsg_common(rtm, msglen); 1742 } else 1743 printf("type: %u, len: %zu\n", rtm->rtm_type, msglen); 1744 } 1745 1746 return; 1747 1748 badlen: 1749 (void)printf(errfmt, __func__, msglen); 1750 #undef REQUIRE 1751 } 1752 1753 static void 1754 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1755 { 1756 struct sockaddr *sp[RTAX_MAX]; 1757 struct timespec ts; 1758 char *cp; 1759 int i; 1760 1761 memset(sp, 0, sizeof(sp)); 1762 (void)printf(" route to: %s\n", 1763 routename((struct sockaddr *)&so[RTAX_DST])); 1764 if (rtm->rtm_version != RTM_VERSION) { 1765 warnx("routing message version %d not understood", 1766 rtm->rtm_version); 1767 return; 1768 } 1769 if (rtm->rtm_msglen > msglen) { 1770 warnx("message length mismatch, in packet %d, returned %d", 1771 rtm->rtm_msglen, msglen); 1772 return; 1773 } 1774 if (rtm->rtm_errno) { 1775 errno = rtm->rtm_errno; 1776 warn("message indicates error %d", errno); 1777 return; 1778 } 1779 cp = ((char *)(rtm + 1)); 1780 for (i = 0; i < RTAX_MAX; i++) 1781 if (rtm->rtm_addrs & (1 << i)) { 1782 sp[i] = (struct sockaddr *)cp; 1783 cp += SA_SIZE((struct sockaddr *)cp); 1784 } 1785 if ((rtm->rtm_addrs & RTA_IFP) && 1786 (sp[RTAX_IFP]->sa_family != AF_LINK || 1787 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1788 sp[RTAX_IFP] = NULL; 1789 if (sp[RTAX_DST]) 1790 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1791 if (sp[RTAX_NETMASK]) 1792 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1793 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1794 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1795 if (fib >= 0) 1796 (void)printf(" fib: %u\n", (unsigned int)fib); 1797 if (sp[RTAX_IFP]) 1798 (void)printf(" interface: %.*s\n", 1799 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1800 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1801 (void)printf(" flags: "); 1802 printb(rtm->rtm_flags, routeflags); 1803 1804 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1805 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1806 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1807 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1808 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1809 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1810 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1811 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1812 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1813 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1814 if (rtm->rtm_rmx.rmx_expire > 0) 1815 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1816 else 1817 ts.tv_sec = 0; 1818 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1819 lock(EXPIRE)); 1820 #undef lock 1821 #undef msec 1822 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1823 if (verbose) 1824 pmsg_common(rtm, msglen); 1825 else if (rtm->rtm_addrs &~ RTA_IGN) { 1826 (void)printf("sockaddrs: "); 1827 printb(rtm->rtm_addrs, addrnames); 1828 putchar('\n'); 1829 } 1830 #undef RTA_IGN 1831 } 1832 1833 static void 1834 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1835 { 1836 1837 (void)printf("\nlocks: "); 1838 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1839 (void)printf(" inits: "); 1840 printb(rtm->rtm_inits, metricnames); 1841 if (msglen > sizeof(struct rt_msghdr)) 1842 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1843 msglen - sizeof(struct rt_msghdr)); 1844 else 1845 (void)fflush(stdout); 1846 } 1847 1848 static void 1849 pmsg_addrs(char *cp, int addrs, size_t len) 1850 { 1851 struct sockaddr *sa; 1852 int i; 1853 1854 if (addrs == 0) { 1855 (void)putchar('\n'); 1856 return; 1857 } 1858 (void)printf("\nsockaddrs: "); 1859 printb(addrs, addrnames); 1860 putchar('\n'); 1861 for (i = 0; i < RTAX_MAX; i++) 1862 if (addrs & (1 << i)) { 1863 sa = (struct sockaddr *)cp; 1864 if (len == 0 || len < SA_SIZE(sa)) { 1865 (void)printf(errfmt, __func__, len); 1866 break; 1867 } 1868 (void)printf(" %s", routename(sa)); 1869 len -= SA_SIZE(sa); 1870 cp += SA_SIZE(sa); 1871 } 1872 (void)putchar('\n'); 1873 (void)fflush(stdout); 1874 } 1875 1876 void 1877 printb(int b, const char *str) 1878 { 1879 int i; 1880 int gotsome = 0; 1881 1882 if (b == 0) 1883 return; 1884 while ((i = *str++) != 0) { 1885 if (b & (1 << (i-1))) { 1886 if (gotsome == 0) 1887 i = '<'; 1888 else 1889 i = ','; 1890 putchar(i); 1891 gotsome = 1; 1892 for (; (i = *str) > 32; str++) 1893 putchar(i); 1894 } else 1895 while (*str > 32) 1896 str++; 1897 } 1898 if (gotsome) 1899 putchar('>'); 1900 } 1901 1902 int 1903 keyword(const char *cp) 1904 { 1905 const struct keytab *kt = keywords; 1906 1907 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1908 kt++; 1909 return (kt->kt_i); 1910 } 1911 1912 static void 1913 sodump(struct sockaddr *sa, const char *which) 1914 { 1915 #ifdef INET6 1916 char nbuf[INET6_ADDRSTRLEN]; 1917 #endif 1918 1919 switch (sa->sa_family) { 1920 case AF_LINK: 1921 (void)printf("%s: link %s; ", which, 1922 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1923 break; 1924 #ifdef INET 1925 case AF_INET: 1926 (void)printf("%s: inet %s; ", which, 1927 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1928 break; 1929 #endif 1930 #ifdef INET6 1931 case AF_INET6: 1932 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1933 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1934 sizeof(nbuf))); 1935 break; 1936 #endif 1937 } 1938 (void)fflush(stdout); 1939 } 1940 1941 /* States*/ 1942 #define VIRGIN 0 1943 #define GOTONE 1 1944 #define GOTTWO 2 1945 /* Inputs */ 1946 #define DIGIT (4*0) 1947 #define END (4*1) 1948 #define DELIM (4*2) 1949 1950 static void 1951 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1952 { 1953 char *cp = (char *)sa; 1954 char *cplim = cp + size; 1955 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1956 1957 memset(cp, 0, size); 1958 cp++; 1959 do { 1960 if ((*addr >= '0') && (*addr <= '9')) { 1961 new = *addr - '0'; 1962 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1963 new = *addr - 'a' + 10; 1964 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1965 new = *addr - 'A' + 10; 1966 } else if (*addr == '\0') 1967 state |= END; 1968 else 1969 state |= DELIM; 1970 addr++; 1971 switch (state /* | INPUT */) { 1972 case GOTTWO | DIGIT: 1973 *cp++ = byte; /*FALLTHROUGH*/ 1974 case VIRGIN | DIGIT: 1975 state = GOTONE; byte = new; continue; 1976 case GOTONE | DIGIT: 1977 state = GOTTWO; byte = new + (byte << 4); continue; 1978 default: /* | DELIM */ 1979 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1980 case GOTONE | END: 1981 case GOTTWO | END: 1982 *cp++ = byte; /* FALLTHROUGH */ 1983 case VIRGIN | END: 1984 break; 1985 } 1986 break; 1987 } while (cp < cplim); 1988 sa->sa_len = cp - (char *)sa; 1989 } 1990