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 *, struct hostent **, int); 121 static int keyword(const char *); 122 #ifdef INET 123 static void inet_makenetandmask(u_long, struct sockaddr_in *, 124 struct sockaddr_in *, u_long); 125 #endif 126 #ifdef INET6 127 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 128 #endif 129 static void interfaces(void); 130 static void monitor(int, char*[]); 131 static const char *netname(struct sockaddr *); 132 static void newroute(int, char **); 133 static int newroute_fib(int, char *, int); 134 static void pmsg_addrs(char *, int, size_t); 135 static void pmsg_common(struct rt_msghdr *, size_t); 136 static int prefixlen(const char *); 137 static void print_getmsg(struct rt_msghdr *, int, int); 138 static void print_rtmsg(struct rt_msghdr *, size_t); 139 static const char *routename(struct sockaddr *); 140 static int rtmsg(int, int, int); 141 static void set_metric(char *, int); 142 static int set_sofib(int); 143 static void sockaddr(char *, struct sockaddr *, size_t); 144 static void sodump(struct sockaddr *, const char *); 145 static int fiboptlist_csv(const char *, struct fibl_head_t *); 146 static int fiboptlist_range(const char *, struct fibl_head_t *); 147 148 static void usage(const char *) __dead2; 149 150 #define READ_TIMEOUT 10 151 static volatile sig_atomic_t stop_read; 152 153 static void 154 stopit(int sig __unused) 155 { 156 157 stop_read = 1; 158 } 159 160 static void 161 usage(const char *cp) 162 { 163 if (cp != NULL) 164 warnx("bad keyword: %s", cp); 165 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 166 /* NOTREACHED */ 167 } 168 169 int 170 main(int argc, char **argv) 171 { 172 int ch; 173 size_t len; 174 175 if (argc < 2) 176 usage(NULL); 177 178 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 179 switch(ch) { 180 case '4': 181 #ifdef INET 182 af = AF_INET; 183 aflen = sizeof(struct sockaddr_in); 184 #else 185 errx(1, "IPv4 support is not compiled in"); 186 #endif 187 break; 188 case '6': 189 #ifdef INET6 190 af = AF_INET6; 191 aflen = sizeof(struct sockaddr_in6); 192 #else 193 errx(1, "IPv6 support is not compiled in"); 194 #endif 195 break; 196 case 'n': 197 nflag = 1; 198 break; 199 case 'q': 200 qflag = 1; 201 break; 202 case 'v': 203 verbose = 1; 204 break; 205 case 't': 206 tflag = 1; 207 break; 208 case 'd': 209 debugonly = 1; 210 break; 211 case '?': 212 default: 213 usage(NULL); 214 } 215 argc -= optind; 216 argv += optind; 217 218 pid = getpid(); 219 uid = geteuid(); 220 if (tflag) 221 s = open(_PATH_DEVNULL, O_WRONLY, 0); 222 else 223 s = socket(PF_ROUTE, SOCK_RAW, 0); 224 if (s < 0) 225 err(EX_OSERR, "socket"); 226 227 len = sizeof(numfibs); 228 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 229 numfibs = -1; 230 231 len = sizeof(defaultfib); 232 if (numfibs != -1 && 233 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 234 0) == -1) 235 defaultfib = -1; 236 237 if (*argv != NULL) 238 switch (keyword(*argv)) { 239 case K_GET: 240 case K_SHOW: 241 uid = 0; 242 /* FALLTHROUGH */ 243 244 case K_CHANGE: 245 case K_ADD: 246 case K_DEL: 247 case K_DELETE: 248 newroute(argc, argv); 249 /* NOTREACHED */ 250 251 case K_MONITOR: 252 monitor(argc, argv); 253 /* NOTREACHED */ 254 255 case K_FLUSH: 256 flushroutes(argc, argv); 257 exit(0); 258 /* NOTREACHED */ 259 } 260 usage(*argv); 261 /* NOTREACHED */ 262 } 263 264 static int 265 set_sofib(int fib) 266 { 267 268 if (fib < 0) 269 return (0); 270 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 271 sizeof(fib))); 272 } 273 274 static int 275 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 276 { 277 struct fibl *fl; 278 char *str0, *str, *token, *endptr; 279 int fib[2], i, error; 280 281 str0 = str = strdup(arg); 282 error = 0; 283 i = 0; 284 while ((token = strsep(&str, "-")) != NULL) { 285 switch (i) { 286 case 0: 287 case 1: 288 errno = 0; 289 fib[i] = strtol(token, &endptr, 0); 290 if (errno == 0) { 291 if (*endptr != '\0' || 292 fib[i] < 0 || 293 (numfibs != -1 && fib[i] > numfibs - 1)) 294 errno = EINVAL; 295 } 296 if (errno) 297 error = 1; 298 break; 299 default: 300 error = 1; 301 } 302 if (error) 303 goto fiboptlist_range_ret; 304 i++; 305 } 306 if (fib[0] >= fib[1]) { 307 error = 1; 308 goto fiboptlist_range_ret; 309 } 310 for (i = fib[0]; i <= fib[1]; i++) { 311 fl = calloc(1, sizeof(*fl)); 312 if (fl == NULL) { 313 error = 1; 314 goto fiboptlist_range_ret; 315 } 316 fl->fl_num = i; 317 TAILQ_INSERT_TAIL(flh, fl, fl_next); 318 } 319 fiboptlist_range_ret: 320 free(str0); 321 return (error); 322 } 323 324 #define ALLSTRLEN 64 325 static int 326 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 327 { 328 struct fibl *fl; 329 char *str0, *str, *token, *endptr; 330 int fib, error; 331 332 str0 = str = NULL; 333 if (strcmp("all", arg) == 0) { 334 str = calloc(1, ALLSTRLEN); 335 if (str == NULL) { 336 error = 1; 337 goto fiboptlist_csv_ret; 338 } 339 if (numfibs > 1) 340 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 341 else 342 snprintf(str, ALLSTRLEN - 1, "%d", 0); 343 } else if (strcmp("default", arg) == 0) { 344 str0 = str = calloc(1, ALLSTRLEN); 345 if (str == NULL) { 346 error = 1; 347 goto fiboptlist_csv_ret; 348 } 349 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 350 } else 351 str0 = str = strdup(arg); 352 353 error = 0; 354 while ((token = strsep(&str, ",")) != NULL) { 355 if (*token != '-' && strchr(token, '-') != NULL) { 356 error = fiboptlist_range(token, flh); 357 if (error) 358 goto fiboptlist_csv_ret; 359 } else { 360 errno = 0; 361 fib = strtol(token, &endptr, 0); 362 if (errno == 0) { 363 if (*endptr != '\0' || 364 fib < 0 || 365 (numfibs != -1 && fib > numfibs - 1)) 366 errno = EINVAL; 367 } 368 if (errno) { 369 error = 1; 370 goto fiboptlist_csv_ret; 371 } 372 fl = calloc(1, sizeof(*fl)); 373 if (fl == NULL) { 374 error = 1; 375 goto fiboptlist_csv_ret; 376 } 377 fl->fl_num = fib; 378 TAILQ_INSERT_TAIL(flh, fl, fl_next); 379 } 380 } 381 fiboptlist_csv_ret: 382 if (str0 != NULL) 383 free(str0); 384 return (error); 385 } 386 387 /* 388 * Purge all entries in the routing tables not 389 * associated with network interfaces. 390 */ 391 static void 392 flushroutes(int argc, char *argv[]) 393 { 394 struct fibl *fl; 395 int error; 396 397 if (uid != 0 && !debugonly && !tflag) 398 errx(EX_NOPERM, "must be root to alter routing table"); 399 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 400 401 TAILQ_INIT(&fibl_head); 402 while (argc > 1) { 403 argc--; 404 argv++; 405 if (**argv != '-') 406 usage(*argv); 407 switch (keyword(*argv + 1)) { 408 #ifdef INET 409 case K_4: 410 case K_INET: 411 af = AF_INET; 412 break; 413 #endif 414 #ifdef INET6 415 case K_6: 416 case K_INET6: 417 af = AF_INET6; 418 break; 419 #endif 420 case K_LINK: 421 af = AF_LINK; 422 break; 423 case K_FIB: 424 if (!--argc) 425 usage(*argv); 426 error = fiboptlist_csv(*++argv, &fibl_head); 427 if (error) 428 errx(EX_USAGE, "invalid fib number: %s", *argv); 429 break; 430 default: 431 usage(*argv); 432 } 433 } 434 if (TAILQ_EMPTY(&fibl_head)) { 435 error = fiboptlist_csv("default", &fibl_head); 436 if (error) 437 errx(EX_OSERR, "fiboptlist_csv failed."); 438 } 439 TAILQ_FOREACH(fl, &fibl_head, fl_next) 440 flushroutes_fib(fl->fl_num); 441 } 442 443 static int 444 flushroutes_fib(int fib) 445 { 446 struct rt_msghdr *rtm; 447 size_t needed; 448 char *buf, *next, *lim; 449 int mib[7], rlen, seqno, count = 0; 450 int error; 451 452 error = set_sofib(fib); 453 if (error) { 454 warn("fib number %d is ignored", fib); 455 return (error); 456 } 457 458 retry: 459 mib[0] = CTL_NET; 460 mib[1] = PF_ROUTE; 461 mib[2] = 0; /* protocol */ 462 mib[3] = AF_UNSPEC; 463 mib[4] = NET_RT_DUMP; 464 mib[5] = 0; /* no flags */ 465 mib[6] = fib; 466 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 467 err(EX_OSERR, "route-sysctl-estimate"); 468 if ((buf = malloc(needed)) == NULL) 469 errx(EX_OSERR, "malloc failed"); 470 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 471 if (errno == ENOMEM && count++ < 10) { 472 warnx("Routing table grew, retrying"); 473 sleep(1); 474 free(buf); 475 goto retry; 476 } 477 err(EX_OSERR, "route-sysctl-get"); 478 } 479 lim = buf + needed; 480 if (verbose) 481 (void)printf("Examining routing table from sysctl\n"); 482 seqno = 0; /* ??? */ 483 for (next = buf; next < lim; next += rtm->rtm_msglen) { 484 rtm = (struct rt_msghdr *)(void *)next; 485 if (verbose) 486 print_rtmsg(rtm, rtm->rtm_msglen); 487 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 488 continue; 489 if (af != 0) { 490 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 491 492 if (sa->sa_family != af) 493 continue; 494 } 495 if (debugonly) 496 continue; 497 rtm->rtm_type = RTM_DELETE; 498 rtm->rtm_seq = seqno; 499 rlen = write(s, next, rtm->rtm_msglen); 500 if (rlen < 0 && errno == EPERM) 501 err(1, "write to routing socket"); 502 if (rlen < (int)rtm->rtm_msglen) { 503 warn("write to routing socket"); 504 (void)printf("got only %d for rlen\n", rlen); 505 free(buf); 506 goto retry; 507 break; 508 } 509 seqno++; 510 if (qflag) 511 continue; 512 if (verbose) 513 print_rtmsg(rtm, rlen); 514 else { 515 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 516 517 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 518 routename(sa) : netname(sa)); 519 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 520 printf("%-20.20s ", routename(sa)); 521 if (fib >= 0) 522 printf("-fib %-3d ", fib); 523 printf("done\n"); 524 } 525 } 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 hostent *hp; 794 struct fibl *fl; 795 char *cmd; 796 const char *dest, *gateway, *errmsg; 797 int key, error, flags, nrflags, fibnum; 798 799 if (uid != 0 && !debugonly && !tflag) 800 errx(EX_NOPERM, "must be root to alter routing table"); 801 dest = NULL; 802 gateway = NULL; 803 flags = RTF_STATIC; 804 nrflags = 0; 805 hp = NULL; 806 TAILQ_INIT(&fibl_head); 807 808 sigemptyset(&sa.sa_mask); 809 sa.sa_flags = 0; 810 sa.sa_handler = stopit; 811 if (sigaction(SIGALRM, &sa, 0) == -1) 812 warn("sigaction SIGALRM"); 813 814 cmd = argv[0]; 815 if (*cmd != 'g' && *cmd != 's') 816 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 817 while (--argc > 0) { 818 if (**(++argv)== '-') { 819 switch (key = keyword(1 + *argv)) { 820 case K_LINK: 821 af = AF_LINK; 822 aflen = sizeof(struct sockaddr_dl); 823 break; 824 #ifdef INET 825 case K_4: 826 case K_INET: 827 af = AF_INET; 828 aflen = sizeof(struct sockaddr_in); 829 break; 830 #endif 831 #ifdef INET6 832 case K_6: 833 case K_INET6: 834 af = AF_INET6; 835 aflen = sizeof(struct sockaddr_in6); 836 break; 837 #endif 838 case K_SA: 839 af = PF_ROUTE; 840 aflen = sizeof(struct sockaddr_storage); 841 break; 842 case K_IFACE: 843 case K_INTERFACE: 844 nrflags |= F_INTERFACE; 845 break; 846 case K_NOSTATIC: 847 flags &= ~RTF_STATIC; 848 break; 849 case K_LOCK: 850 locking = 1; 851 break; 852 case K_LOCKREST: 853 lockrest = 1; 854 break; 855 case K_HOST: 856 nrflags |= F_FORCEHOST; 857 break; 858 case K_REJECT: 859 flags |= RTF_REJECT; 860 break; 861 case K_BLACKHOLE: 862 flags |= RTF_BLACKHOLE; 863 break; 864 case K_PROTO1: 865 flags |= RTF_PROTO1; 866 break; 867 case K_PROTO2: 868 flags |= RTF_PROTO2; 869 break; 870 case K_PROXY: 871 nrflags |= F_PROXY; 872 break; 873 case K_XRESOLVE: 874 flags |= RTF_XRESOLVE; 875 break; 876 case K_STATIC: 877 flags |= RTF_STATIC; 878 break; 879 case K_STICKY: 880 flags |= RTF_STICKY; 881 break; 882 case K_NOSTICK: 883 flags &= ~RTF_STICKY; 884 break; 885 case K_FIB: 886 if (!--argc) 887 usage(NULL); 888 error = fiboptlist_csv(*++argv, &fibl_head); 889 if (error) 890 errx(EX_USAGE, 891 "invalid fib number: %s", *argv); 892 break; 893 case K_IFA: 894 if (!--argc) 895 usage(NULL); 896 getaddr(RTAX_IFA, *++argv, 0, nrflags); 897 break; 898 case K_IFP: 899 if (!--argc) 900 usage(NULL); 901 getaddr(RTAX_IFP, *++argv, 0, nrflags); 902 break; 903 case K_GENMASK: 904 if (!--argc) 905 usage(NULL); 906 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 907 break; 908 case K_GATEWAY: 909 if (!--argc) 910 usage(NULL); 911 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 912 gateway = *argv; 913 break; 914 case K_DST: 915 if (!--argc) 916 usage(NULL); 917 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 918 nrflags |= F_ISHOST; 919 dest = *argv; 920 break; 921 case K_NETMASK: 922 if (!--argc) 923 usage(NULL); 924 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 925 /* FALLTHROUGH */ 926 case K_NET: 927 nrflags |= F_FORCENET; 928 break; 929 case K_PREFIXLEN: 930 if (!--argc) 931 usage(NULL); 932 if (prefixlen(*++argv) == -1) { 933 nrflags &= ~F_FORCENET; 934 nrflags |= F_ISHOST; 935 } else { 936 nrflags |= F_FORCENET; 937 nrflags &= ~F_ISHOST; 938 } 939 break; 940 case K_MTU: 941 case K_HOPCOUNT: 942 case K_EXPIRE: 943 case K_RECVPIPE: 944 case K_SENDPIPE: 945 case K_SSTHRESH: 946 case K_RTT: 947 case K_RTTVAR: 948 case K_WEIGHT: 949 if (!--argc) 950 usage(NULL); 951 set_metric(*++argv, key); 952 break; 953 default: 954 usage(1+*argv); 955 } 956 } else { 957 if ((rtm_addrs & RTA_DST) == 0) { 958 dest = *argv; 959 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 960 nrflags |= F_ISHOST; 961 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 962 gateway = *argv; 963 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 964 } else { 965 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 966 nrflags |= F_FORCENET; 967 } 968 } 969 } 970 971 /* Do some sanity checks on resulting request */ 972 if (so[RTAX_DST].ss_len == 0) { 973 warnx("destination parameter required"); 974 usage(NULL); 975 } 976 977 if (so[RTAX_NETMASK].ss_len != 0 && 978 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 979 warnx("destination and netmask family need to be the same"); 980 usage(NULL); 981 } 982 983 if (nrflags & F_FORCEHOST) { 984 nrflags |= F_ISHOST; 985 #ifdef INET6 986 if (af == AF_INET6) { 987 rtm_addrs &= ~RTA_NETMASK; 988 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 989 } 990 #endif 991 } 992 if (nrflags & F_FORCENET) 993 nrflags &= ~F_ISHOST; 994 flags |= RTF_UP; 995 if (nrflags & F_ISHOST) 996 flags |= RTF_HOST; 997 if ((nrflags & F_INTERFACE) == 0) 998 flags |= RTF_GATEWAY; 999 if (nrflags & F_PROXY) 1000 flags |= RTF_ANNOUNCE; 1001 if (dest == NULL) 1002 dest = ""; 1003 if (gateway == NULL) 1004 gateway = ""; 1005 1006 if (TAILQ_EMPTY(&fibl_head)) { 1007 error = fiboptlist_csv("default", &fibl_head); 1008 if (error) 1009 errx(EX_OSERR, "fiboptlist_csv failed."); 1010 } 1011 error = 0; 1012 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1013 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1014 if (fl->fl_error) 1015 fl->fl_errno = errno; 1016 error += fl->fl_error; 1017 } 1018 if (*cmd == 'g' || *cmd == 's') 1019 exit(error); 1020 1021 error = 0; 1022 if (!qflag) { 1023 fibnum = 0; 1024 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1025 if (fl->fl_error == 0) 1026 fibnum++; 1027 } 1028 if (fibnum > 0) { 1029 int firstfib = 1; 1030 1031 printf("%s %s %s", cmd, 1032 (nrflags & F_ISHOST) ? "host" : "net", dest); 1033 if (*gateway) 1034 printf(": gateway %s", gateway); 1035 1036 if (numfibs > 1) { 1037 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1038 if (fl->fl_error == 0 1039 && fl->fl_num >= 0) { 1040 if (firstfib) { 1041 printf(" fib "); 1042 firstfib = 0; 1043 } 1044 printf("%d", fl->fl_num); 1045 if (fibnum-- > 1) 1046 printf(","); 1047 } 1048 } 1049 } 1050 printf("\n"); 1051 } 1052 1053 fibnum = 0; 1054 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1055 if (fl->fl_error != 0) { 1056 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1057 ? "host" : "net", dest); 1058 if (*gateway) 1059 printf(": gateway %s", gateway); 1060 1061 if (fl->fl_num >= 0) 1062 printf(" fib %d", fl->fl_num); 1063 1064 switch (fl->fl_errno) { 1065 case ESRCH: 1066 errmsg = "not in table"; 1067 break; 1068 case EBUSY: 1069 errmsg = "entry in use"; 1070 break; 1071 case ENOBUFS: 1072 errmsg = "not enough memory"; 1073 break; 1074 case EADDRINUSE: 1075 /* 1076 * handle recursion avoidance 1077 * in rt_setgate() 1078 */ 1079 errmsg = "gateway uses the same route"; 1080 break; 1081 case EEXIST: 1082 errmsg = "route already in table"; 1083 break; 1084 default: 1085 errmsg = strerror(fl->fl_errno); 1086 break; 1087 } 1088 printf(": %s\n", errmsg); 1089 error = 1; 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_makenetandmask(u_long net, struct sockaddr_in *sin, 1114 struct sockaddr_in *sin_mask, u_long bits) 1115 { 1116 u_long mask = 0; 1117 1118 rtm_addrs |= RTA_NETMASK; 1119 1120 /* 1121 * MSB of net should be meaningful. 0/0 is exception. 1122 */ 1123 if (net > 0) 1124 while ((net & 0xff000000) == 0) 1125 net <<= 8; 1126 1127 /* 1128 * If no /xx was specified we must calculate the 1129 * CIDR address. 1130 */ 1131 if ((bits == 0) && (net != 0)) { 1132 u_long i, j; 1133 1134 for(i = 0, j = 0xff; i < 4; i++) { 1135 if (net & j) { 1136 break; 1137 } 1138 j <<= 8; 1139 } 1140 /* i holds the first non zero bit */ 1141 bits = 32 - (i*8); 1142 } 1143 if (bits != 0) 1144 mask = 0xffffffff << (32 - bits); 1145 1146 sin->sin_addr.s_addr = htonl(net); 1147 sin_mask->sin_addr.s_addr = htonl(mask); 1148 sin_mask->sin_len = sizeof(struct sockaddr_in); 1149 sin_mask->sin_family = AF_INET; 1150 } 1151 #endif 1152 1153 #ifdef INET6 1154 /* 1155 * XXX the function may need more improvement... 1156 */ 1157 static int 1158 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1159 { 1160 1161 if (plen == NULL) { 1162 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1163 sin6->sin6_scope_id == 0) 1164 plen = "0"; 1165 } 1166 1167 if (plen == NULL || strcmp(plen, "128") == 0) 1168 return (1); 1169 rtm_addrs |= RTA_NETMASK; 1170 prefixlen(plen); 1171 return (0); 1172 } 1173 #endif 1174 1175 /* 1176 * Interpret an argument as a network address of some kind, 1177 * returning 1 if a host address, 0 if a network address. 1178 */ 1179 static int 1180 getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1181 { 1182 struct sockaddr *sa; 1183 #if defined(INET) 1184 struct sockaddr_in *sin; 1185 struct hostent *hp; 1186 struct netent *np; 1187 u_long val; 1188 char *q; 1189 #elif defined(INET6) 1190 char *q; 1191 #endif 1192 1193 if (idx < 0 || idx >= RTAX_MAX) 1194 usage("internal error"); 1195 if (af == 0) { 1196 #if defined(INET) 1197 af = AF_INET; 1198 aflen = sizeof(struct sockaddr_in); 1199 #elif defined(INET6) 1200 af = AF_INET6; 1201 aflen = sizeof(struct sockaddr_in6); 1202 #else 1203 af = AF_LINK; 1204 aflen = sizeof(struct sockaddr_dl); 1205 #endif 1206 } 1207 #ifndef INET 1208 hpp = NULL; 1209 #endif 1210 rtm_addrs |= (1 << idx); 1211 sa = (struct sockaddr *)&so[idx]; 1212 sa->sa_family = af; 1213 sa->sa_len = aflen; 1214 1215 switch (idx) { 1216 case RTAX_GATEWAY: 1217 if (nrflags & F_INTERFACE) { 1218 struct ifaddrs *ifap, *ifa; 1219 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1220 struct sockaddr_dl *sdl = NULL; 1221 1222 if (getifaddrs(&ifap)) 1223 err(EX_OSERR, "getifaddrs"); 1224 1225 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1226 if (ifa->ifa_addr->sa_family != AF_LINK) 1227 continue; 1228 1229 if (strcmp(str, ifa->ifa_name) != 0) 1230 continue; 1231 1232 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1233 } 1234 /* If we found it, then use it */ 1235 if (sdl != NULL) { 1236 /* 1237 * Note that we need to copy before calling 1238 * freeifaddrs(). 1239 */ 1240 memcpy(sdl0, sdl, sdl->sdl_len); 1241 } 1242 freeifaddrs(ifap); 1243 if (sdl != NULL) 1244 return(1); 1245 else 1246 errx(EX_DATAERR, 1247 "interface '%s' does not exist", str); 1248 } 1249 break; 1250 case RTAX_IFP: 1251 sa->sa_family = AF_LINK; 1252 break; 1253 } 1254 if (strcmp(str, "default") == 0) { 1255 /* 1256 * Default is net 0.0.0.0/0 1257 */ 1258 switch (idx) { 1259 case RTAX_DST: 1260 nrflags |= F_FORCENET; 1261 getaddr(RTAX_NETMASK, str, 0, nrflags); 1262 break; 1263 } 1264 return (0); 1265 } 1266 switch (sa->sa_family) { 1267 #ifdef INET6 1268 case AF_INET6: 1269 { 1270 struct addrinfo hints, *res; 1271 int ecode; 1272 1273 q = NULL; 1274 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1275 *q = '\0'; 1276 memset(&hints, 0, sizeof(hints)); 1277 hints.ai_family = sa->sa_family; 1278 hints.ai_socktype = SOCK_DGRAM; 1279 ecode = getaddrinfo(str, NULL, &hints, &res); 1280 if (ecode != 0 || res->ai_family != AF_INET6 || 1281 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1282 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1283 memcpy(sa, res->ai_addr, res->ai_addrlen); 1284 freeaddrinfo(res); 1285 if (q != NULL) 1286 *q++ = '/'; 1287 if (idx == RTAX_DST) 1288 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1289 return (0); 1290 } 1291 #endif /* INET6 */ 1292 case AF_LINK: 1293 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1294 return (1); 1295 1296 case PF_ROUTE: 1297 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1298 return (1); 1299 #ifdef INET 1300 case AF_INET: 1301 #endif 1302 default: 1303 break; 1304 } 1305 1306 #ifdef INET 1307 sin = (struct sockaddr_in *)(void *)sa; 1308 if (hpp == NULL) 1309 hpp = &hp; 1310 *hpp = NULL; 1311 1312 q = strchr(str,'/'); 1313 if (q != NULL && idx == RTAX_DST) { 1314 *q = '\0'; 1315 if ((val = inet_network(str)) != INADDR_NONE) { 1316 inet_makenetandmask(val, sin, 1317 (struct sockaddr_in *)&so[RTAX_NETMASK], 1318 strtoul(q+1, 0, 0)); 1319 return (0); 1320 } 1321 *q = '/'; 1322 } 1323 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1324 inet_aton(str, &sin->sin_addr)) { 1325 val = sin->sin_addr.s_addr; 1326 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1327 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1328 return (1); 1329 else { 1330 val = ntohl(val); 1331 goto netdone; 1332 } 1333 } 1334 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1335 ((val = inet_network(str)) != INADDR_NONE || 1336 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1337 netdone: 1338 inet_makenetandmask(val, sin, 1339 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1340 return (0); 1341 } 1342 hp = gethostbyname(str); 1343 if (hp != NULL) { 1344 *hpp = hp; 1345 sin->sin_family = hp->h_addrtype; 1346 memmove((char *)&sin->sin_addr, hp->h_addr, 1347 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1348 return (1); 1349 } 1350 #endif 1351 errx(EX_NOHOST, "bad address: %s", str); 1352 } 1353 1354 static int 1355 prefixlen(const char *str) 1356 { 1357 int len = atoi(str), q, r; 1358 int max; 1359 char *p; 1360 1361 rtm_addrs |= RTA_NETMASK; 1362 switch (af) { 1363 #ifdef INET6 1364 case AF_INET6: 1365 { 1366 struct sockaddr_in6 *sin6 = 1367 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1368 1369 max = 128; 1370 p = (char *)&sin6->sin6_addr; 1371 sin6->sin6_family = AF_INET6; 1372 sin6->sin6_len = sizeof(*sin6); 1373 break; 1374 } 1375 #endif 1376 #ifdef INET 1377 case AF_INET: 1378 { 1379 struct sockaddr_in *sin = 1380 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1381 1382 max = 32; 1383 p = (char *)&sin->sin_addr; 1384 sin->sin_family = AF_INET; 1385 sin->sin_len = sizeof(*sin); 1386 break; 1387 } 1388 #endif 1389 default: 1390 errx(EX_OSERR, "prefixlen not supported in this af"); 1391 } 1392 1393 if (len < 0 || max < len) 1394 errx(EX_USAGE, "%s: invalid prefixlen", str); 1395 1396 q = len >> 3; 1397 r = len & 7; 1398 memset((void *)p, 0, max / 8); 1399 if (q > 0) 1400 memset((void *)p, 0xff, q); 1401 if (r > 0) 1402 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1403 if (len == max) 1404 return (-1); 1405 else 1406 return (len); 1407 } 1408 1409 static void 1410 interfaces(void) 1411 { 1412 size_t needed; 1413 int mib[6]; 1414 char *buf, *lim, *next, count = 0; 1415 struct rt_msghdr *rtm; 1416 1417 retry2: 1418 mib[0] = CTL_NET; 1419 mib[1] = PF_ROUTE; 1420 mib[2] = 0; /* protocol */ 1421 mib[3] = AF_UNSPEC; 1422 mib[4] = NET_RT_IFLIST; 1423 mib[5] = 0; /* no flags */ 1424 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1425 err(EX_OSERR, "route-sysctl-estimate"); 1426 if ((buf = malloc(needed)) == NULL) 1427 errx(EX_OSERR, "malloc failed"); 1428 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1429 if (errno == ENOMEM && count++ < 10) { 1430 warnx("Routing table grew, retrying"); 1431 sleep(1); 1432 free(buf); 1433 goto retry2; 1434 } 1435 err(EX_OSERR, "actual retrieval of interface table"); 1436 } 1437 lim = buf + needed; 1438 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1439 rtm = (struct rt_msghdr *)(void *)next; 1440 print_rtmsg(rtm, rtm->rtm_msglen); 1441 } 1442 } 1443 1444 static void 1445 monitor(int argc, char *argv[]) 1446 { 1447 int n, fib, error; 1448 char msg[2048], *endptr; 1449 1450 fib = defaultfib; 1451 while (argc > 1) { 1452 argc--; 1453 argv++; 1454 if (**argv != '-') 1455 usage(*argv); 1456 switch (keyword(*argv + 1)) { 1457 case K_FIB: 1458 if (!--argc) 1459 usage(*argv); 1460 errno = 0; 1461 fib = strtol(*++argv, &endptr, 0); 1462 if (errno == 0) { 1463 if (*endptr != '\0' || 1464 fib < 0 || 1465 (numfibs != -1 && fib > numfibs - 1)) 1466 errno = EINVAL; 1467 } 1468 if (errno) 1469 errx(EX_USAGE, "invalid fib number: %s", *argv); 1470 break; 1471 default: 1472 usage(*argv); 1473 } 1474 } 1475 error = set_sofib(fib); 1476 if (error) 1477 errx(EX_USAGE, "invalid fib number: %d", fib); 1478 1479 verbose = 1; 1480 if (debugonly) { 1481 interfaces(); 1482 exit(0); 1483 } 1484 for (;;) { 1485 time_t now; 1486 n = read(s, msg, 2048); 1487 now = time(NULL); 1488 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1489 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1490 } 1491 } 1492 1493 static int 1494 rtmsg(int cmd, int flags, int fib) 1495 { 1496 int rlen; 1497 char *cp = m_rtmsg.m_space; 1498 int l; 1499 1500 #define NEXTADDR(w, u) \ 1501 if (rtm_addrs & (w)) { \ 1502 l = SA_SIZE(&(u)); \ 1503 memmove(cp, (char *)&(u), l); \ 1504 cp += l; \ 1505 if (verbose) \ 1506 sodump((struct sockaddr *)&(u), #w); \ 1507 } 1508 1509 errno = 0; 1510 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1511 if (cmd == 'a') 1512 cmd = RTM_ADD; 1513 else if (cmd == 'c') 1514 cmd = RTM_CHANGE; 1515 else if (cmd == 'g' || cmd == 's') { 1516 cmd = RTM_GET; 1517 if (so[RTAX_IFP].ss_family == 0) { 1518 so[RTAX_IFP].ss_family = AF_LINK; 1519 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1520 rtm_addrs |= RTA_IFP; 1521 } 1522 } else { 1523 cmd = RTM_DELETE; 1524 flags |= RTF_PINNED; 1525 } 1526 #define rtm m_rtmsg.m_rtm 1527 rtm.rtm_type = cmd; 1528 rtm.rtm_flags = flags; 1529 rtm.rtm_version = RTM_VERSION; 1530 rtm.rtm_seq = ++rtm_seq; 1531 rtm.rtm_addrs = rtm_addrs; 1532 rtm.rtm_rmx = rt_metrics; 1533 rtm.rtm_inits = rtm_inits; 1534 1535 NEXTADDR(RTA_DST, so[RTAX_DST]); 1536 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1537 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1538 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1539 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1540 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1541 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1542 if (verbose) 1543 print_rtmsg(&rtm, l); 1544 if (debugonly) 1545 return (0); 1546 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1547 switch (errno) { 1548 case EPERM: 1549 err(1, "writing to routing socket"); 1550 break; 1551 case ESRCH: 1552 warnx("route has not been found"); 1553 break; 1554 case EEXIST: 1555 /* Handled by newroute() */ 1556 break; 1557 default: 1558 warn("writing to routing socket"); 1559 } 1560 return (-1); 1561 } 1562 if (cmd == RTM_GET) { 1563 stop_read = 0; 1564 alarm(READ_TIMEOUT); 1565 do { 1566 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1567 } while (l > 0 && stop_read == 0 && 1568 (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq || 1569 rtm.rtm_pid != pid)); 1570 if (stop_read != 0) { 1571 warnx("read from routing socket timed out"); 1572 return (-1); 1573 } else 1574 alarm(0); 1575 if (l < 0) 1576 warn("read from routing socket"); 1577 else 1578 print_getmsg(&rtm, l, fib); 1579 } 1580 #undef rtm 1581 return (0); 1582 } 1583 1584 static const char *const msgtypes[] = { 1585 "", 1586 "RTM_ADD: Add Route", 1587 "RTM_DELETE: Delete Route", 1588 "RTM_CHANGE: Change Metrics or flags", 1589 "RTM_GET: Report Metrics", 1590 "RTM_LOSING: Kernel Suspects Partitioning", 1591 "RTM_REDIRECT: Told to use different route", 1592 "RTM_MISS: Lookup failed on this address", 1593 "RTM_LOCK: fix specified metrics", 1594 "RTM_OLDADD: caused by SIOCADDRT", 1595 "RTM_OLDDEL: caused by SIOCDELRT", 1596 "RTM_RESOLVE: Route created by cloning", 1597 "RTM_NEWADDR: address being added to iface", 1598 "RTM_DELADDR: address being removed from iface", 1599 "RTM_IFINFO: iface status change", 1600 "RTM_NEWMADDR: new multicast group membership on iface", 1601 "RTM_DELMADDR: multicast group membership removed from iface", 1602 "RTM_IFANNOUNCE: interface arrival/departure", 1603 "RTM_IEEE80211: IEEE 802.11 wireless event", 1604 }; 1605 1606 static const char metricnames[] = 1607 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1608 "\1mtu"; 1609 static const char routeflags[] = 1610 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1611 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1612 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1613 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1614 static const char ifnetflags[] = 1615 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1616 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1617 "\017LINK2\020MULTICAST"; 1618 static const char addrnames[] = 1619 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1620 1621 static const char errfmt[] = 1622 "\n%s: truncated route message, only %zu bytes left\n"; 1623 1624 static void 1625 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1626 { 1627 struct if_msghdr *ifm; 1628 struct ifa_msghdr *ifam; 1629 #ifdef RTM_NEWMADDR 1630 struct ifma_msghdr *ifmam; 1631 #endif 1632 struct if_announcemsghdr *ifan; 1633 const char *state; 1634 1635 if (verbose == 0) 1636 return; 1637 if (rtm->rtm_version != RTM_VERSION) { 1638 (void)printf("routing message version %d not understood\n", 1639 rtm->rtm_version); 1640 return; 1641 } 1642 if (rtm->rtm_type < nitems(msgtypes)) 1643 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1644 else 1645 (void)printf("unknown type %d: ", rtm->rtm_type); 1646 (void)printf("len %d, ", rtm->rtm_msglen); 1647 1648 #define REQUIRE(x) do { \ 1649 if (msglen < sizeof(x)) \ 1650 goto badlen; \ 1651 else \ 1652 msglen -= sizeof(x); \ 1653 } while (0) 1654 1655 switch (rtm->rtm_type) { 1656 case RTM_IFINFO: 1657 REQUIRE(struct if_msghdr); 1658 ifm = (struct if_msghdr *)rtm; 1659 (void)printf("if# %d, ", ifm->ifm_index); 1660 switch (ifm->ifm_data.ifi_link_state) { 1661 case LINK_STATE_DOWN: 1662 state = "down"; 1663 break; 1664 case LINK_STATE_UP: 1665 state = "up"; 1666 break; 1667 default: 1668 state = "unknown"; 1669 break; 1670 } 1671 (void)printf("link: %s, flags:", state); 1672 printb(ifm->ifm_flags, ifnetflags); 1673 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1674 break; 1675 case RTM_NEWADDR: 1676 case RTM_DELADDR: 1677 REQUIRE(struct ifa_msghdr); 1678 ifam = (struct ifa_msghdr *)rtm; 1679 (void)printf("metric %d, flags:", ifam->ifam_metric); 1680 printb(ifam->ifam_flags, routeflags); 1681 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1682 break; 1683 #ifdef RTM_NEWMADDR 1684 case RTM_NEWMADDR: 1685 case RTM_DELMADDR: 1686 REQUIRE(struct ifma_msghdr); 1687 ifmam = (struct ifma_msghdr *)rtm; 1688 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1689 break; 1690 #endif 1691 case RTM_IFANNOUNCE: 1692 REQUIRE(struct if_announcemsghdr); 1693 ifan = (struct if_announcemsghdr *)rtm; 1694 (void)printf("if# %d, what: ", ifan->ifan_index); 1695 switch (ifan->ifan_what) { 1696 case IFAN_ARRIVAL: 1697 (void)printf("arrival"); 1698 break; 1699 case IFAN_DEPARTURE: 1700 printf("departure"); 1701 break; 1702 default: 1703 printf("#%d", ifan->ifan_what); 1704 break; 1705 } 1706 printf("\n"); 1707 fflush(stdout); 1708 break; 1709 1710 default: 1711 if (rtm->rtm_type <= RTM_RESOLVE) { 1712 printf("pid: %ld, seq %d, errno %d, flags:", 1713 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1714 printb(rtm->rtm_flags, routeflags); 1715 pmsg_common(rtm, msglen); 1716 } else 1717 printf("type: %u, len: %zu\n", rtm->rtm_type, msglen); 1718 } 1719 1720 return; 1721 1722 badlen: 1723 (void)printf(errfmt, __func__, msglen); 1724 #undef REQUIRE 1725 } 1726 1727 static void 1728 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1729 { 1730 struct sockaddr *sp[RTAX_MAX]; 1731 struct timespec ts; 1732 char *cp; 1733 int i; 1734 1735 memset(sp, 0, sizeof(sp)); 1736 (void)printf(" route to: %s\n", 1737 routename((struct sockaddr *)&so[RTAX_DST])); 1738 if (rtm->rtm_version != RTM_VERSION) { 1739 warnx("routing message version %d not understood", 1740 rtm->rtm_version); 1741 return; 1742 } 1743 if (rtm->rtm_msglen > msglen) { 1744 warnx("message length mismatch, in packet %d, returned %d", 1745 rtm->rtm_msglen, msglen); 1746 return; 1747 } 1748 if (rtm->rtm_errno) { 1749 errno = rtm->rtm_errno; 1750 warn("message indicates error %d", errno); 1751 return; 1752 } 1753 cp = ((char *)(rtm + 1)); 1754 for (i = 0; i < RTAX_MAX; i++) 1755 if (rtm->rtm_addrs & (1 << i)) { 1756 sp[i] = (struct sockaddr *)cp; 1757 cp += SA_SIZE((struct sockaddr *)cp); 1758 } 1759 if ((rtm->rtm_addrs & RTA_IFP) && 1760 (sp[RTAX_IFP]->sa_family != AF_LINK || 1761 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1762 sp[RTAX_IFP] = NULL; 1763 if (sp[RTAX_DST]) 1764 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1765 if (sp[RTAX_NETMASK]) 1766 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1767 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1768 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1769 if (fib >= 0) 1770 (void)printf(" fib: %u\n", (unsigned int)fib); 1771 if (sp[RTAX_IFP]) 1772 (void)printf(" interface: %.*s\n", 1773 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1774 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1775 (void)printf(" flags: "); 1776 printb(rtm->rtm_flags, routeflags); 1777 1778 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1779 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1780 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1781 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1782 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1783 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1784 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1785 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1786 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1787 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1788 if (rtm->rtm_rmx.rmx_expire > 0) 1789 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1790 else 1791 ts.tv_sec = 0; 1792 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1793 lock(EXPIRE)); 1794 #undef lock 1795 #undef msec 1796 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1797 if (verbose) 1798 pmsg_common(rtm, msglen); 1799 else if (rtm->rtm_addrs &~ RTA_IGN) { 1800 (void)printf("sockaddrs: "); 1801 printb(rtm->rtm_addrs, addrnames); 1802 putchar('\n'); 1803 } 1804 #undef RTA_IGN 1805 } 1806 1807 static void 1808 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1809 { 1810 1811 (void)printf("\nlocks: "); 1812 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1813 (void)printf(" inits: "); 1814 printb(rtm->rtm_inits, metricnames); 1815 if (msglen > sizeof(struct rt_msghdr)) 1816 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1817 msglen - sizeof(struct rt_msghdr)); 1818 else 1819 (void)fflush(stdout); 1820 } 1821 1822 static void 1823 pmsg_addrs(char *cp, int addrs, size_t len) 1824 { 1825 struct sockaddr *sa; 1826 int i; 1827 1828 if (addrs == 0) { 1829 (void)putchar('\n'); 1830 return; 1831 } 1832 (void)printf("\nsockaddrs: "); 1833 printb(addrs, addrnames); 1834 putchar('\n'); 1835 for (i = 0; i < RTAX_MAX; i++) 1836 if (addrs & (1 << i)) { 1837 sa = (struct sockaddr *)cp; 1838 if (len == 0 || len < SA_SIZE(sa)) { 1839 (void)printf(errfmt, __func__, len); 1840 break; 1841 } 1842 (void)printf(" %s", routename(sa)); 1843 len -= SA_SIZE(sa); 1844 cp += SA_SIZE(sa); 1845 } 1846 (void)putchar('\n'); 1847 (void)fflush(stdout); 1848 } 1849 1850 static void 1851 printb(int b, const char *str) 1852 { 1853 int i; 1854 int gotsome = 0; 1855 1856 if (b == 0) 1857 return; 1858 while ((i = *str++) != 0) { 1859 if (b & (1 << (i-1))) { 1860 if (gotsome == 0) 1861 i = '<'; 1862 else 1863 i = ','; 1864 putchar(i); 1865 gotsome = 1; 1866 for (; (i = *str) > 32; str++) 1867 putchar(i); 1868 } else 1869 while (*str > 32) 1870 str++; 1871 } 1872 if (gotsome) 1873 putchar('>'); 1874 } 1875 1876 int 1877 keyword(const char *cp) 1878 { 1879 const struct keytab *kt = keywords; 1880 1881 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1882 kt++; 1883 return (kt->kt_i); 1884 } 1885 1886 static void 1887 sodump(struct sockaddr *sa, const char *which) 1888 { 1889 #ifdef INET6 1890 char nbuf[INET6_ADDRSTRLEN]; 1891 #endif 1892 1893 switch (sa->sa_family) { 1894 case AF_LINK: 1895 (void)printf("%s: link %s; ", which, 1896 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1897 break; 1898 #ifdef INET 1899 case AF_INET: 1900 (void)printf("%s: inet %s; ", which, 1901 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1902 break; 1903 #endif 1904 #ifdef INET6 1905 case AF_INET6: 1906 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1907 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1908 sizeof(nbuf))); 1909 break; 1910 #endif 1911 } 1912 (void)fflush(stdout); 1913 } 1914 1915 /* States*/ 1916 #define VIRGIN 0 1917 #define GOTONE 1 1918 #define GOTTWO 2 1919 /* Inputs */ 1920 #define DIGIT (4*0) 1921 #define END (4*1) 1922 #define DELIM (4*2) 1923 1924 static void 1925 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1926 { 1927 char *cp = (char *)sa; 1928 char *cplim = cp + size; 1929 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1930 1931 memset(cp, 0, size); 1932 cp++; 1933 do { 1934 if ((*addr >= '0') && (*addr <= '9')) { 1935 new = *addr - '0'; 1936 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1937 new = *addr - 'a' + 10; 1938 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1939 new = *addr - 'A' + 10; 1940 } else if (*addr == '\0') 1941 state |= END; 1942 else 1943 state |= DELIM; 1944 addr++; 1945 switch (state /* | INPUT */) { 1946 case GOTTWO | DIGIT: 1947 *cp++ = byte; /*FALLTHROUGH*/ 1948 case VIRGIN | DIGIT: 1949 state = GOTONE; byte = new; continue; 1950 case GOTONE | DIGIT: 1951 state = GOTTWO; byte = new + (byte << 4); continue; 1952 default: /* | DELIM */ 1953 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1954 case GOTONE | END: 1955 case GOTTWO | END: 1956 *cp++ = byte; /* FALLTHROUGH */ 1957 case VIRGIN | END: 1958 break; 1959 } 1960 break; 1961 } while (cp < cplim); 1962 sa->sa_len = cp - (char *)sa; 1963 } 1964