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