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 free(buf); 527 return (error); 528 } 529 530 static const char * 531 routename(struct sockaddr *sa) 532 { 533 struct sockaddr_dl *sdl; 534 const char *cp; 535 int n; 536 537 if (!domain_initialized) { 538 domain_initialized = true; 539 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 540 (cp = strchr(domain, '.'))) { 541 domain[MAXHOSTNAMELEN] = '\0'; 542 (void)strcpy(domain, cp + 1); 543 } else 544 domain[0] = '\0'; 545 } 546 547 /* If the address is zero-filled, use "default". */ 548 if (sa->sa_len == 0 && nflag == 0) 549 return ("default"); 550 #if defined(INET) || defined(INET6) 551 switch (sa->sa_family) { 552 #ifdef INET 553 case AF_INET: 554 /* If the address is zero-filled, use "default". */ 555 if (nflag == 0 && 556 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 557 INADDR_ANY) 558 return("default"); 559 break; 560 #endif 561 #ifdef INET6 562 case AF_INET6: 563 /* If the address is zero-filled, use "default". */ 564 if (nflag == 0 && 565 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 566 return("default"); 567 break; 568 #endif 569 } 570 #endif 571 572 switch (sa->sa_family) { 573 #if defined(INET) || defined(INET6) 574 #ifdef INET 575 case AF_INET: 576 #endif 577 #ifdef INET6 578 case AF_INET6: 579 #endif 580 { 581 struct sockaddr_storage ss; 582 int error; 583 char *p; 584 585 memset(&ss, 0, sizeof(ss)); 586 if (sa->sa_len == 0) 587 ss.ss_family = sa->sa_family; 588 else 589 memcpy(&ss, sa, sa->sa_len); 590 /* Expand sa->sa_len because it could be shortened. */ 591 if (sa->sa_family == AF_INET) 592 ss.ss_len = sizeof(struct sockaddr_in); 593 else if (sa->sa_family == AF_INET6) 594 ss.ss_len = sizeof(struct sockaddr_in6); 595 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 596 rt_line, sizeof(rt_line), NULL, 0, 597 (nflag == 0) ? 0 : NI_NUMERICHOST); 598 if (error) { 599 warnx("getnameinfo(): %s", gai_strerror(error)); 600 strncpy(rt_line, "invalid", sizeof(rt_line)); 601 } 602 603 /* Remove the domain part if any. */ 604 p = strchr(rt_line, '.'); 605 if (p != NULL && strcmp(p + 1, domain) == 0) 606 *p = '\0'; 607 608 return (rt_line); 609 break; 610 } 611 #endif 612 case AF_LINK: 613 sdl = (struct sockaddr_dl *)(void *)sa; 614 615 if (sdl->sdl_nlen == 0 && 616 sdl->sdl_alen == 0 && 617 sdl->sdl_slen == 0) { 618 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 619 sdl->sdl_index); 620 if (n > (int)sizeof(rt_line)) 621 rt_line[0] = '\0'; 622 return (rt_line); 623 } else 624 return (link_ntoa(sdl)); 625 break; 626 627 default: 628 { 629 u_short *sp = (u_short *)(void *)sa; 630 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 631 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 632 char *cpe = rt_line + sizeof(rt_line); 633 634 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 635 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 636 cps += n; 637 else 638 *cps = '\0'; 639 break; 640 } 641 } 642 return (rt_line); 643 } 644 645 /* 646 * Return the name of the network whose address is given. 647 * The address is assumed to be that of a net, not a host. 648 */ 649 static const char * 650 netname(struct sockaddr *sa) 651 { 652 struct sockaddr_dl *sdl; 653 int n; 654 #ifdef INET 655 struct netent *np = NULL; 656 const char *cp = NULL; 657 u_long i; 658 #endif 659 660 switch (sa->sa_family) { 661 #ifdef INET 662 case AF_INET: 663 { 664 struct in_addr in; 665 666 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 667 i = in.s_addr = ntohl(in.s_addr); 668 if (in.s_addr == 0) 669 cp = "default"; 670 else if (!nflag) { 671 np = getnetbyaddr(i, AF_INET); 672 if (np != NULL) 673 cp = np->n_name; 674 } 675 #define C(x) (unsigned)((x) & 0xff) 676 if (cp != NULL) 677 strncpy(net_line, cp, sizeof(net_line)); 678 else if ((in.s_addr & 0xffffff) == 0) 679 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 680 else if ((in.s_addr & 0xffff) == 0) 681 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 682 C(in.s_addr >> 16)); 683 else if ((in.s_addr & 0xff) == 0) 684 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 685 C(in.s_addr >> 16), C(in.s_addr >> 8)); 686 else 687 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 688 C(in.s_addr >> 16), C(in.s_addr >> 8), 689 C(in.s_addr)); 690 #undef C 691 break; 692 } 693 #endif 694 #ifdef INET6 695 case AF_INET6: 696 { 697 struct sockaddr_in6 sin6; 698 int niflags = 0; 699 700 memset(&sin6, 0, sizeof(sin6)); 701 memcpy(&sin6, sa, sa->sa_len); 702 sin6.sin6_len = sizeof(sin6); 703 sin6.sin6_family = AF_INET6; 704 if (nflag) 705 niflags |= NI_NUMERICHOST; 706 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 707 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 708 strncpy(net_line, "invalid", sizeof(net_line)); 709 710 return(net_line); 711 } 712 #endif 713 case AF_LINK: 714 sdl = (struct sockaddr_dl *)(void *)sa; 715 716 if (sdl->sdl_nlen == 0 && 717 sdl->sdl_alen == 0 && 718 sdl->sdl_slen == 0) { 719 n = snprintf(net_line, sizeof(net_line), "link#%d", 720 sdl->sdl_index); 721 if (n > (int)sizeof(net_line)) 722 net_line[0] = '\0'; 723 return (net_line); 724 } else 725 return (link_ntoa(sdl)); 726 break; 727 728 default: 729 { 730 u_short *sp = (u_short *)(void *)sa->sa_data; 731 u_short *splim = sp + ((sa->sa_len + 1)>>1); 732 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 733 char *cpe = net_line + sizeof(net_line); 734 735 while (sp < splim && cps < cpe) 736 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 737 cps += n; 738 else 739 *cps = '\0'; 740 break; 741 } 742 } 743 return (net_line); 744 } 745 746 static void 747 set_metric(char *value, int key) 748 { 749 int flag = 0; 750 char *endptr; 751 u_long noval, *valp = &noval; 752 753 switch (key) { 754 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 755 caseof(K_MTU, RTV_MTU, rmx_mtu); 756 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 757 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 758 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 759 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 760 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 761 caseof(K_RTT, RTV_RTT, rmx_rtt); 762 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 763 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 764 } 765 rtm_inits |= flag; 766 if (lockrest || locking) 767 rt_metrics.rmx_locks |= flag; 768 if (locking) 769 locking = 0; 770 errno = 0; 771 *valp = strtol(value, &endptr, 0); 772 if (errno == 0 && *endptr != '\0') 773 errno = EINVAL; 774 if (errno) 775 err(EX_USAGE, "%s", value); 776 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 777 struct timespec ts; 778 779 clock_gettime(CLOCK_REALTIME_FAST, &ts); 780 *valp += ts.tv_sec; 781 } 782 } 783 784 #define F_ISHOST 0x01 785 #define F_FORCENET 0x02 786 #define F_FORCEHOST 0x04 787 #define F_PROXY 0x08 788 #define F_INTERFACE 0x10 789 790 static void 791 newroute(int argc, char **argv) 792 { 793 struct sigaction sa; 794 struct hostent *hp; 795 struct fibl *fl; 796 char *cmd; 797 const char *dest, *gateway, *errmsg; 798 int key, error, flags, nrflags, fibnum; 799 800 if (uid != 0 && !debugonly && !tflag) 801 errx(EX_NOPERM, "must be root to alter routing table"); 802 dest = NULL; 803 gateway = NULL; 804 flags = RTF_STATIC; 805 nrflags = 0; 806 hp = NULL; 807 TAILQ_INIT(&fibl_head); 808 809 sigemptyset(&sa.sa_mask); 810 sa.sa_flags = 0; 811 sa.sa_handler = stopit; 812 if (sigaction(SIGALRM, &sa, 0) == -1) 813 warn("sigaction SIGALRM"); 814 815 cmd = argv[0]; 816 if (*cmd != 'g' && *cmd != 's') 817 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 818 while (--argc > 0) { 819 if (**(++argv)== '-') { 820 switch (key = keyword(1 + *argv)) { 821 case K_LINK: 822 af = AF_LINK; 823 aflen = sizeof(struct sockaddr_dl); 824 break; 825 #ifdef INET 826 case K_4: 827 case K_INET: 828 af = AF_INET; 829 aflen = sizeof(struct sockaddr_in); 830 break; 831 #endif 832 #ifdef INET6 833 case K_6: 834 case K_INET6: 835 af = AF_INET6; 836 aflen = sizeof(struct sockaddr_in6); 837 break; 838 #endif 839 case K_SA: 840 af = PF_ROUTE; 841 aflen = sizeof(struct sockaddr_storage); 842 break; 843 case K_IFACE: 844 case K_INTERFACE: 845 nrflags |= F_INTERFACE; 846 break; 847 case K_NOSTATIC: 848 flags &= ~RTF_STATIC; 849 break; 850 case K_LOCK: 851 locking = 1; 852 break; 853 case K_LOCKREST: 854 lockrest = 1; 855 break; 856 case K_HOST: 857 nrflags |= F_FORCEHOST; 858 break; 859 case K_REJECT: 860 flags |= RTF_REJECT; 861 break; 862 case K_BLACKHOLE: 863 flags |= RTF_BLACKHOLE; 864 break; 865 case K_PROTO1: 866 flags |= RTF_PROTO1; 867 break; 868 case K_PROTO2: 869 flags |= RTF_PROTO2; 870 break; 871 case K_PROXY: 872 nrflags |= F_PROXY; 873 break; 874 case K_XRESOLVE: 875 flags |= RTF_XRESOLVE; 876 break; 877 case K_STATIC: 878 flags |= RTF_STATIC; 879 break; 880 case K_STICKY: 881 flags |= RTF_STICKY; 882 break; 883 case K_NOSTICK: 884 flags &= ~RTF_STICKY; 885 break; 886 case K_FIB: 887 if (!--argc) 888 usage(NULL); 889 error = fiboptlist_csv(*++argv, &fibl_head); 890 if (error) 891 errx(EX_USAGE, 892 "invalid fib number: %s", *argv); 893 break; 894 case K_IFA: 895 if (!--argc) 896 usage(NULL); 897 getaddr(RTAX_IFA, *++argv, 0, nrflags); 898 break; 899 case K_IFP: 900 if (!--argc) 901 usage(NULL); 902 getaddr(RTAX_IFP, *++argv, 0, nrflags); 903 break; 904 case K_GENMASK: 905 if (!--argc) 906 usage(NULL); 907 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 908 break; 909 case K_GATEWAY: 910 if (!--argc) 911 usage(NULL); 912 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 913 gateway = *argv; 914 break; 915 case K_DST: 916 if (!--argc) 917 usage(NULL); 918 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 919 nrflags |= F_ISHOST; 920 dest = *argv; 921 break; 922 case K_NETMASK: 923 if (!--argc) 924 usage(NULL); 925 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 926 /* FALLTHROUGH */ 927 case K_NET: 928 nrflags |= F_FORCENET; 929 break; 930 case K_PREFIXLEN: 931 if (!--argc) 932 usage(NULL); 933 if (prefixlen(*++argv) == -1) { 934 nrflags &= ~F_FORCENET; 935 nrflags |= F_ISHOST; 936 } else { 937 nrflags |= F_FORCENET; 938 nrflags &= ~F_ISHOST; 939 } 940 break; 941 case K_MTU: 942 case K_HOPCOUNT: 943 case K_EXPIRE: 944 case K_RECVPIPE: 945 case K_SENDPIPE: 946 case K_SSTHRESH: 947 case K_RTT: 948 case K_RTTVAR: 949 case K_WEIGHT: 950 if (!--argc) 951 usage(NULL); 952 set_metric(*++argv, key); 953 break; 954 default: 955 usage(1+*argv); 956 } 957 } else { 958 if ((rtm_addrs & RTA_DST) == 0) { 959 dest = *argv; 960 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 961 nrflags |= F_ISHOST; 962 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 963 gateway = *argv; 964 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 965 } else { 966 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 967 nrflags |= F_FORCENET; 968 } 969 } 970 } 971 972 /* Do some sanity checks on resulting request */ 973 if (so[RTAX_DST].ss_len == 0) { 974 warnx("destination parameter required"); 975 usage(NULL); 976 } 977 978 if (so[RTAX_NETMASK].ss_len != 0 && 979 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 980 warnx("destination and netmask family need to be the same"); 981 usage(NULL); 982 } 983 984 if (nrflags & F_FORCEHOST) { 985 nrflags |= F_ISHOST; 986 #ifdef INET6 987 if (af == AF_INET6) { 988 rtm_addrs &= ~RTA_NETMASK; 989 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 990 } 991 #endif 992 } 993 if (nrflags & F_FORCENET) 994 nrflags &= ~F_ISHOST; 995 flags |= RTF_UP; 996 if (nrflags & F_ISHOST) 997 flags |= RTF_HOST; 998 if ((nrflags & F_INTERFACE) == 0) 999 flags |= RTF_GATEWAY; 1000 if (nrflags & F_PROXY) 1001 flags |= RTF_ANNOUNCE; 1002 if (dest == NULL) 1003 dest = ""; 1004 if (gateway == NULL) 1005 gateway = ""; 1006 1007 if (TAILQ_EMPTY(&fibl_head)) { 1008 error = fiboptlist_csv("default", &fibl_head); 1009 if (error) 1010 errx(EX_OSERR, "fiboptlist_csv failed."); 1011 } 1012 error = 0; 1013 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1014 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1015 if (fl->fl_error) 1016 fl->fl_errno = errno; 1017 error += fl->fl_error; 1018 } 1019 if (*cmd == 'g' || *cmd == 's') 1020 exit(error); 1021 1022 error = 0; 1023 if (!qflag) { 1024 fibnum = 0; 1025 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1026 if (fl->fl_error == 0) 1027 fibnum++; 1028 } 1029 if (fibnum > 0) { 1030 int firstfib = 1; 1031 1032 printf("%s %s %s", cmd, 1033 (nrflags & F_ISHOST) ? "host" : "net", dest); 1034 if (*gateway) 1035 printf(": gateway %s", gateway); 1036 1037 if (numfibs > 1) { 1038 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1039 if (fl->fl_error == 0 1040 && fl->fl_num >= 0) { 1041 if (firstfib) { 1042 printf(" fib "); 1043 firstfib = 0; 1044 } 1045 printf("%d", fl->fl_num); 1046 if (fibnum-- > 1) 1047 printf(","); 1048 } 1049 } 1050 } 1051 printf("\n"); 1052 } 1053 } 1054 1055 fibnum = 0; 1056 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1057 if (fl->fl_error != 0) { 1058 error = 1; 1059 if (!qflag) { 1060 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1061 ? "host" : "net", dest); 1062 if (*gateway) 1063 printf(": gateway %s", gateway); 1064 1065 if (fl->fl_num >= 0) 1066 printf(" fib %d", fl->fl_num); 1067 1068 switch (fl->fl_errno) { 1069 case ESRCH: 1070 errmsg = "not in table"; 1071 break; 1072 case EBUSY: 1073 errmsg = "entry in use"; 1074 break; 1075 case ENOBUFS: 1076 errmsg = "not enough memory"; 1077 break; 1078 case EADDRINUSE: 1079 /* 1080 * handle recursion avoidance 1081 * in rt_setgate() 1082 */ 1083 errmsg = "gateway uses the same route"; 1084 break; 1085 case EEXIST: 1086 errmsg = "route already in table"; 1087 break; 1088 default: 1089 errmsg = strerror(fl->fl_errno); 1090 break; 1091 } 1092 printf(": %s\n", errmsg); 1093 } 1094 } 1095 } 1096 exit(error); 1097 } 1098 1099 static int 1100 newroute_fib(int fib, char *cmd, int flags) 1101 { 1102 int error; 1103 1104 error = set_sofib(fib); 1105 if (error) { 1106 warn("fib number %d is ignored", fib); 1107 return (error); 1108 } 1109 1110 error = rtmsg(*cmd, flags, fib); 1111 return (error); 1112 } 1113 1114 #ifdef INET 1115 static void 1116 inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1117 struct sockaddr_in *sin_mask, u_long bits) 1118 { 1119 u_long mask = 0; 1120 1121 rtm_addrs |= RTA_NETMASK; 1122 1123 /* 1124 * MSB of net should be meaningful. 0/0 is exception. 1125 */ 1126 if (net > 0) 1127 while ((net & 0xff000000) == 0) 1128 net <<= 8; 1129 1130 /* 1131 * If no /xx was specified we must calculate the 1132 * CIDR address. 1133 */ 1134 if ((bits == 0) && (net != 0)) { 1135 u_long i, j; 1136 1137 for(i = 0, j = 0xff; i < 4; i++) { 1138 if (net & j) { 1139 break; 1140 } 1141 j <<= 8; 1142 } 1143 /* i holds the first non zero bit */ 1144 bits = 32 - (i*8); 1145 } 1146 if (bits != 0) 1147 mask = 0xffffffff << (32 - bits); 1148 1149 sin->sin_addr.s_addr = htonl(net); 1150 sin_mask->sin_addr.s_addr = htonl(mask); 1151 sin_mask->sin_len = sizeof(struct sockaddr_in); 1152 sin_mask->sin_family = AF_INET; 1153 } 1154 #endif 1155 1156 #ifdef INET6 1157 /* 1158 * XXX the function may need more improvement... 1159 */ 1160 static int 1161 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1162 { 1163 1164 if (plen == NULL) { 1165 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1166 sin6->sin6_scope_id == 0) 1167 plen = "0"; 1168 } 1169 1170 if (plen == NULL || strcmp(plen, "128") == 0) 1171 return (1); 1172 rtm_addrs |= RTA_NETMASK; 1173 prefixlen(plen); 1174 return (0); 1175 } 1176 #endif 1177 1178 /* 1179 * Interpret an argument as a network address of some kind, 1180 * returning 1 if a host address, 0 if a network address. 1181 */ 1182 static int 1183 getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1184 { 1185 struct sockaddr *sa; 1186 #if defined(INET) 1187 struct sockaddr_in *sin; 1188 struct hostent *hp; 1189 struct netent *np; 1190 u_long val; 1191 char *q; 1192 #elif defined(INET6) 1193 char *q; 1194 #endif 1195 1196 if (idx < 0 || idx >= RTAX_MAX) 1197 usage("internal error"); 1198 if (af == 0) { 1199 #if defined(INET) 1200 af = AF_INET; 1201 aflen = sizeof(struct sockaddr_in); 1202 #elif defined(INET6) 1203 af = AF_INET6; 1204 aflen = sizeof(struct sockaddr_in6); 1205 #else 1206 af = AF_LINK; 1207 aflen = sizeof(struct sockaddr_dl); 1208 #endif 1209 } 1210 #ifndef INET 1211 hpp = NULL; 1212 #endif 1213 rtm_addrs |= (1 << idx); 1214 sa = (struct sockaddr *)&so[idx]; 1215 sa->sa_family = af; 1216 sa->sa_len = aflen; 1217 1218 switch (idx) { 1219 case RTAX_GATEWAY: 1220 if (nrflags & F_INTERFACE) { 1221 struct ifaddrs *ifap, *ifa; 1222 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1223 struct sockaddr_dl *sdl = NULL; 1224 1225 if (getifaddrs(&ifap)) 1226 err(EX_OSERR, "getifaddrs"); 1227 1228 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1229 if (ifa->ifa_addr->sa_family != AF_LINK) 1230 continue; 1231 1232 if (strcmp(str, ifa->ifa_name) != 0) 1233 continue; 1234 1235 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1236 } 1237 /* If we found it, then use it */ 1238 if (sdl != NULL) { 1239 /* 1240 * Note that we need to copy before calling 1241 * freeifaddrs(). 1242 */ 1243 memcpy(sdl0, sdl, sdl->sdl_len); 1244 } 1245 freeifaddrs(ifap); 1246 if (sdl != NULL) 1247 return(1); 1248 else 1249 errx(EX_DATAERR, 1250 "interface '%s' does not exist", str); 1251 } 1252 break; 1253 case RTAX_IFP: 1254 sa->sa_family = AF_LINK; 1255 break; 1256 } 1257 if (strcmp(str, "default") == 0) { 1258 /* 1259 * Default is net 0.0.0.0/0 1260 */ 1261 switch (idx) { 1262 case RTAX_DST: 1263 nrflags |= F_FORCENET; 1264 getaddr(RTAX_NETMASK, str, 0, nrflags); 1265 break; 1266 } 1267 return (0); 1268 } 1269 switch (sa->sa_family) { 1270 #ifdef INET6 1271 case AF_INET6: 1272 { 1273 struct addrinfo hints, *res; 1274 int ecode; 1275 1276 q = NULL; 1277 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1278 *q = '\0'; 1279 memset(&hints, 0, sizeof(hints)); 1280 hints.ai_family = sa->sa_family; 1281 hints.ai_socktype = SOCK_DGRAM; 1282 ecode = getaddrinfo(str, NULL, &hints, &res); 1283 if (ecode != 0 || res->ai_family != AF_INET6 || 1284 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1285 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1286 memcpy(sa, res->ai_addr, res->ai_addrlen); 1287 freeaddrinfo(res); 1288 if (q != NULL) 1289 *q++ = '/'; 1290 if (idx == RTAX_DST) 1291 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1292 return (0); 1293 } 1294 #endif /* INET6 */ 1295 case AF_LINK: 1296 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1297 return (1); 1298 1299 case PF_ROUTE: 1300 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1301 return (1); 1302 #ifdef INET 1303 case AF_INET: 1304 #endif 1305 default: 1306 break; 1307 } 1308 1309 #ifdef INET 1310 sin = (struct sockaddr_in *)(void *)sa; 1311 if (hpp == NULL) 1312 hpp = &hp; 1313 *hpp = NULL; 1314 1315 q = strchr(str,'/'); 1316 if (q != NULL && idx == RTAX_DST) { 1317 *q = '\0'; 1318 if ((val = inet_network(str)) != INADDR_NONE) { 1319 inet_makenetandmask(val, sin, 1320 (struct sockaddr_in *)&so[RTAX_NETMASK], 1321 strtoul(q+1, 0, 0)); 1322 return (0); 1323 } 1324 *q = '/'; 1325 } 1326 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1327 inet_aton(str, &sin->sin_addr)) { 1328 val = sin->sin_addr.s_addr; 1329 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1330 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1331 return (1); 1332 else { 1333 val = ntohl(val); 1334 goto netdone; 1335 } 1336 } 1337 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1338 ((val = inet_network(str)) != INADDR_NONE || 1339 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1340 netdone: 1341 inet_makenetandmask(val, sin, 1342 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1343 return (0); 1344 } 1345 hp = gethostbyname(str); 1346 if (hp != NULL) { 1347 *hpp = hp; 1348 sin->sin_family = hp->h_addrtype; 1349 memmove((char *)&sin->sin_addr, hp->h_addr, 1350 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1351 return (1); 1352 } 1353 #endif 1354 errx(EX_NOHOST, "bad address: %s", str); 1355 } 1356 1357 static int 1358 prefixlen(const char *str) 1359 { 1360 int len = atoi(str), q, r; 1361 int max; 1362 char *p; 1363 1364 rtm_addrs |= RTA_NETMASK; 1365 switch (af) { 1366 #ifdef INET6 1367 case AF_INET6: 1368 { 1369 struct sockaddr_in6 *sin6 = 1370 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1371 1372 max = 128; 1373 p = (char *)&sin6->sin6_addr; 1374 sin6->sin6_family = AF_INET6; 1375 sin6->sin6_len = sizeof(*sin6); 1376 break; 1377 } 1378 #endif 1379 #ifdef INET 1380 case AF_INET: 1381 { 1382 struct sockaddr_in *sin = 1383 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1384 1385 max = 32; 1386 p = (char *)&sin->sin_addr; 1387 sin->sin_family = AF_INET; 1388 sin->sin_len = sizeof(*sin); 1389 break; 1390 } 1391 #endif 1392 default: 1393 errx(EX_OSERR, "prefixlen not supported in this af"); 1394 } 1395 1396 if (len < 0 || max < len) 1397 errx(EX_USAGE, "%s: invalid prefixlen", str); 1398 1399 q = len >> 3; 1400 r = len & 7; 1401 memset((void *)p, 0, max / 8); 1402 if (q > 0) 1403 memset((void *)p, 0xff, q); 1404 if (r > 0) 1405 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1406 if (len == max) 1407 return (-1); 1408 else 1409 return (len); 1410 } 1411 1412 static void 1413 interfaces(void) 1414 { 1415 size_t needed; 1416 int mib[6]; 1417 char *buf, *lim, *next, count = 0; 1418 struct rt_msghdr *rtm; 1419 1420 retry2: 1421 mib[0] = CTL_NET; 1422 mib[1] = PF_ROUTE; 1423 mib[2] = 0; /* protocol */ 1424 mib[3] = AF_UNSPEC; 1425 mib[4] = NET_RT_IFLIST; 1426 mib[5] = 0; /* no flags */ 1427 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1428 err(EX_OSERR, "route-sysctl-estimate"); 1429 if ((buf = malloc(needed)) == NULL) 1430 errx(EX_OSERR, "malloc failed"); 1431 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1432 if (errno == ENOMEM && count++ < 10) { 1433 warnx("Routing table grew, retrying"); 1434 sleep(1); 1435 free(buf); 1436 goto retry2; 1437 } 1438 err(EX_OSERR, "actual retrieval of interface table"); 1439 } 1440 lim = buf + needed; 1441 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1442 rtm = (struct rt_msghdr *)(void *)next; 1443 print_rtmsg(rtm, rtm->rtm_msglen); 1444 } 1445 free(buf); 1446 } 1447 1448 static void 1449 monitor(int argc, char *argv[]) 1450 { 1451 int n, fib, error; 1452 char msg[2048], *endptr; 1453 1454 fib = defaultfib; 1455 while (argc > 1) { 1456 argc--; 1457 argv++; 1458 if (**argv != '-') 1459 usage(*argv); 1460 switch (keyword(*argv + 1)) { 1461 case K_FIB: 1462 if (!--argc) 1463 usage(*argv); 1464 errno = 0; 1465 fib = strtol(*++argv, &endptr, 0); 1466 if (errno == 0) { 1467 if (*endptr != '\0' || 1468 fib < 0 || 1469 (numfibs != -1 && fib > numfibs - 1)) 1470 errno = EINVAL; 1471 } 1472 if (errno) 1473 errx(EX_USAGE, "invalid fib number: %s", *argv); 1474 break; 1475 default: 1476 usage(*argv); 1477 } 1478 } 1479 error = set_sofib(fib); 1480 if (error) 1481 errx(EX_USAGE, "invalid fib number: %d", fib); 1482 1483 verbose = 1; 1484 if (debugonly) { 1485 interfaces(); 1486 exit(0); 1487 } 1488 for (;;) { 1489 time_t now; 1490 n = read(s, msg, 2048); 1491 now = time(NULL); 1492 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1493 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1494 } 1495 } 1496 1497 static int 1498 rtmsg(int cmd, int flags, int fib) 1499 { 1500 int rlen; 1501 char *cp = m_rtmsg.m_space; 1502 int l; 1503 1504 #define NEXTADDR(w, u) \ 1505 if (rtm_addrs & (w)) { \ 1506 l = SA_SIZE(&(u)); \ 1507 memmove(cp, (char *)&(u), l); \ 1508 cp += l; \ 1509 if (verbose) \ 1510 sodump((struct sockaddr *)&(u), #w); \ 1511 } 1512 1513 errno = 0; 1514 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1515 if (cmd == 'a') 1516 cmd = RTM_ADD; 1517 else if (cmd == 'c') 1518 cmd = RTM_CHANGE; 1519 else if (cmd == 'g' || cmd == 's') { 1520 cmd = RTM_GET; 1521 if (so[RTAX_IFP].ss_family == 0) { 1522 so[RTAX_IFP].ss_family = AF_LINK; 1523 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1524 rtm_addrs |= RTA_IFP; 1525 } 1526 } else { 1527 cmd = RTM_DELETE; 1528 flags |= RTF_PINNED; 1529 } 1530 #define rtm m_rtmsg.m_rtm 1531 rtm.rtm_type = cmd; 1532 rtm.rtm_flags = flags; 1533 rtm.rtm_version = RTM_VERSION; 1534 rtm.rtm_seq = ++rtm_seq; 1535 rtm.rtm_addrs = rtm_addrs; 1536 rtm.rtm_rmx = rt_metrics; 1537 rtm.rtm_inits = rtm_inits; 1538 1539 NEXTADDR(RTA_DST, so[RTAX_DST]); 1540 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1541 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1542 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1543 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1544 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1545 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1546 if (verbose) 1547 print_rtmsg(&rtm, l); 1548 if (debugonly) 1549 return (0); 1550 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1551 switch (errno) { 1552 case EPERM: 1553 err(1, "writing to routing socket"); 1554 break; 1555 case ESRCH: 1556 warnx("route has not been found"); 1557 break; 1558 case EEXIST: 1559 /* Handled by newroute() */ 1560 break; 1561 default: 1562 warn("writing to routing socket"); 1563 } 1564 return (-1); 1565 } 1566 if (cmd == RTM_GET) { 1567 stop_read = 0; 1568 alarm(READ_TIMEOUT); 1569 do { 1570 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1571 } while (l > 0 && stop_read == 0 && 1572 (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq || 1573 rtm.rtm_pid != pid)); 1574 if (stop_read != 0) { 1575 warnx("read from routing socket timed out"); 1576 return (-1); 1577 } else 1578 alarm(0); 1579 if (l < 0) 1580 warn("read from routing socket"); 1581 else 1582 print_getmsg(&rtm, l, fib); 1583 } 1584 #undef rtm 1585 return (0); 1586 } 1587 1588 static const char *const msgtypes[] = { 1589 "", 1590 "RTM_ADD: Add Route", 1591 "RTM_DELETE: Delete Route", 1592 "RTM_CHANGE: Change Metrics or flags", 1593 "RTM_GET: Report Metrics", 1594 "RTM_LOSING: Kernel Suspects Partitioning", 1595 "RTM_REDIRECT: Told to use different route", 1596 "RTM_MISS: Lookup failed on this address", 1597 "RTM_LOCK: fix specified metrics", 1598 "RTM_OLDADD: caused by SIOCADDRT", 1599 "RTM_OLDDEL: caused by SIOCDELRT", 1600 "RTM_RESOLVE: Route created by cloning", 1601 "RTM_NEWADDR: address being added to iface", 1602 "RTM_DELADDR: address being removed from iface", 1603 "RTM_IFINFO: iface status change", 1604 "RTM_NEWMADDR: new multicast group membership on iface", 1605 "RTM_DELMADDR: multicast group membership removed from iface", 1606 "RTM_IFANNOUNCE: interface arrival/departure", 1607 "RTM_IEEE80211: IEEE 802.11 wireless event", 1608 }; 1609 1610 static const char metricnames[] = 1611 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1612 "\1mtu"; 1613 static const char routeflags[] = 1614 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1615 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1616 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1617 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1618 static const char ifnetflags[] = 1619 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1620 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1621 "\017LINK2\020MULTICAST"; 1622 static const char addrnames[] = 1623 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1624 1625 static const char errfmt[] = 1626 "\n%s: truncated route message, only %zu bytes left\n"; 1627 1628 static void 1629 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1630 { 1631 struct if_msghdr *ifm; 1632 struct ifa_msghdr *ifam; 1633 #ifdef RTM_NEWMADDR 1634 struct ifma_msghdr *ifmam; 1635 #endif 1636 struct if_announcemsghdr *ifan; 1637 const char *state; 1638 1639 if (verbose == 0) 1640 return; 1641 if (rtm->rtm_version != RTM_VERSION) { 1642 (void)printf("routing message version %d not understood\n", 1643 rtm->rtm_version); 1644 return; 1645 } 1646 if (rtm->rtm_type < nitems(msgtypes)) 1647 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1648 else 1649 (void)printf("unknown type %d: ", rtm->rtm_type); 1650 (void)printf("len %d, ", rtm->rtm_msglen); 1651 1652 #define REQUIRE(x) do { \ 1653 if (msglen < sizeof(x)) \ 1654 goto badlen; \ 1655 else \ 1656 msglen -= sizeof(x); \ 1657 } while (0) 1658 1659 switch (rtm->rtm_type) { 1660 case RTM_IFINFO: 1661 REQUIRE(struct if_msghdr); 1662 ifm = (struct if_msghdr *)rtm; 1663 (void)printf("if# %d, ", ifm->ifm_index); 1664 switch (ifm->ifm_data.ifi_link_state) { 1665 case LINK_STATE_DOWN: 1666 state = "down"; 1667 break; 1668 case LINK_STATE_UP: 1669 state = "up"; 1670 break; 1671 default: 1672 state = "unknown"; 1673 break; 1674 } 1675 (void)printf("link: %s, flags:", state); 1676 printb(ifm->ifm_flags, ifnetflags); 1677 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1678 break; 1679 case RTM_NEWADDR: 1680 case RTM_DELADDR: 1681 REQUIRE(struct ifa_msghdr); 1682 ifam = (struct ifa_msghdr *)rtm; 1683 (void)printf("metric %d, flags:", ifam->ifam_metric); 1684 printb(ifam->ifam_flags, routeflags); 1685 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1686 break; 1687 #ifdef RTM_NEWMADDR 1688 case RTM_NEWMADDR: 1689 case RTM_DELMADDR: 1690 REQUIRE(struct ifma_msghdr); 1691 ifmam = (struct ifma_msghdr *)rtm; 1692 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1693 break; 1694 #endif 1695 case RTM_IFANNOUNCE: 1696 REQUIRE(struct if_announcemsghdr); 1697 ifan = (struct if_announcemsghdr *)rtm; 1698 (void)printf("if# %d, what: ", ifan->ifan_index); 1699 switch (ifan->ifan_what) { 1700 case IFAN_ARRIVAL: 1701 (void)printf("arrival"); 1702 break; 1703 case IFAN_DEPARTURE: 1704 printf("departure"); 1705 break; 1706 default: 1707 printf("#%d", ifan->ifan_what); 1708 break; 1709 } 1710 printf("\n"); 1711 fflush(stdout); 1712 break; 1713 1714 default: 1715 if (rtm->rtm_type <= RTM_RESOLVE) { 1716 printf("pid: %ld, seq %d, errno %d, flags:", 1717 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1718 printb(rtm->rtm_flags, routeflags); 1719 pmsg_common(rtm, msglen); 1720 } else 1721 printf("type: %u, len: %zu\n", rtm->rtm_type, msglen); 1722 } 1723 1724 return; 1725 1726 badlen: 1727 (void)printf(errfmt, __func__, msglen); 1728 #undef REQUIRE 1729 } 1730 1731 static void 1732 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1733 { 1734 struct sockaddr *sp[RTAX_MAX]; 1735 struct timespec ts; 1736 char *cp; 1737 int i; 1738 1739 memset(sp, 0, sizeof(sp)); 1740 (void)printf(" route to: %s\n", 1741 routename((struct sockaddr *)&so[RTAX_DST])); 1742 if (rtm->rtm_version != RTM_VERSION) { 1743 warnx("routing message version %d not understood", 1744 rtm->rtm_version); 1745 return; 1746 } 1747 if (rtm->rtm_msglen > msglen) { 1748 warnx("message length mismatch, in packet %d, returned %d", 1749 rtm->rtm_msglen, msglen); 1750 return; 1751 } 1752 if (rtm->rtm_errno) { 1753 errno = rtm->rtm_errno; 1754 warn("message indicates error %d", errno); 1755 return; 1756 } 1757 cp = ((char *)(rtm + 1)); 1758 for (i = 0; i < RTAX_MAX; i++) 1759 if (rtm->rtm_addrs & (1 << i)) { 1760 sp[i] = (struct sockaddr *)cp; 1761 cp += SA_SIZE((struct sockaddr *)cp); 1762 } 1763 if ((rtm->rtm_addrs & RTA_IFP) && 1764 (sp[RTAX_IFP]->sa_family != AF_LINK || 1765 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1766 sp[RTAX_IFP] = NULL; 1767 if (sp[RTAX_DST]) 1768 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1769 if (sp[RTAX_NETMASK]) 1770 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1771 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1772 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1773 if (fib >= 0) 1774 (void)printf(" fib: %u\n", (unsigned int)fib); 1775 if (sp[RTAX_IFP]) 1776 (void)printf(" interface: %.*s\n", 1777 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1778 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1779 (void)printf(" flags: "); 1780 printb(rtm->rtm_flags, routeflags); 1781 1782 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1783 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1784 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1785 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1786 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1787 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1788 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1789 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1790 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1791 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1792 if (rtm->rtm_rmx.rmx_expire > 0) 1793 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1794 else 1795 ts.tv_sec = 0; 1796 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1797 lock(EXPIRE)); 1798 #undef lock 1799 #undef msec 1800 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1801 if (verbose) 1802 pmsg_common(rtm, msglen); 1803 else if (rtm->rtm_addrs &~ RTA_IGN) { 1804 (void)printf("sockaddrs: "); 1805 printb(rtm->rtm_addrs, addrnames); 1806 putchar('\n'); 1807 } 1808 #undef RTA_IGN 1809 } 1810 1811 static void 1812 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1813 { 1814 1815 (void)printf("\nlocks: "); 1816 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1817 (void)printf(" inits: "); 1818 printb(rtm->rtm_inits, metricnames); 1819 if (msglen > sizeof(struct rt_msghdr)) 1820 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1821 msglen - sizeof(struct rt_msghdr)); 1822 else 1823 (void)fflush(stdout); 1824 } 1825 1826 static void 1827 pmsg_addrs(char *cp, int addrs, size_t len) 1828 { 1829 struct sockaddr *sa; 1830 int i; 1831 1832 if (addrs == 0) { 1833 (void)putchar('\n'); 1834 return; 1835 } 1836 (void)printf("\nsockaddrs: "); 1837 printb(addrs, addrnames); 1838 putchar('\n'); 1839 for (i = 0; i < RTAX_MAX; i++) 1840 if (addrs & (1 << i)) { 1841 sa = (struct sockaddr *)cp; 1842 if (len == 0 || len < SA_SIZE(sa)) { 1843 (void)printf(errfmt, __func__, len); 1844 break; 1845 } 1846 (void)printf(" %s", routename(sa)); 1847 len -= SA_SIZE(sa); 1848 cp += SA_SIZE(sa); 1849 } 1850 (void)putchar('\n'); 1851 (void)fflush(stdout); 1852 } 1853 1854 static void 1855 printb(int b, const char *str) 1856 { 1857 int i; 1858 int gotsome = 0; 1859 1860 if (b == 0) 1861 return; 1862 while ((i = *str++) != 0) { 1863 if (b & (1 << (i-1))) { 1864 if (gotsome == 0) 1865 i = '<'; 1866 else 1867 i = ','; 1868 putchar(i); 1869 gotsome = 1; 1870 for (; (i = *str) > 32; str++) 1871 putchar(i); 1872 } else 1873 while (*str > 32) 1874 str++; 1875 } 1876 if (gotsome) 1877 putchar('>'); 1878 } 1879 1880 int 1881 keyword(const char *cp) 1882 { 1883 const struct keytab *kt = keywords; 1884 1885 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1886 kt++; 1887 return (kt->kt_i); 1888 } 1889 1890 static void 1891 sodump(struct sockaddr *sa, const char *which) 1892 { 1893 #ifdef INET6 1894 char nbuf[INET6_ADDRSTRLEN]; 1895 #endif 1896 1897 switch (sa->sa_family) { 1898 case AF_LINK: 1899 (void)printf("%s: link %s; ", which, 1900 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1901 break; 1902 #ifdef INET 1903 case AF_INET: 1904 (void)printf("%s: inet %s; ", which, 1905 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1906 break; 1907 #endif 1908 #ifdef INET6 1909 case AF_INET6: 1910 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1911 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1912 sizeof(nbuf))); 1913 break; 1914 #endif 1915 } 1916 (void)fflush(stdout); 1917 } 1918 1919 /* States*/ 1920 #define VIRGIN 0 1921 #define GOTONE 1 1922 #define GOTTWO 2 1923 /* Inputs */ 1924 #define DIGIT (4*0) 1925 #define END (4*1) 1926 #define DELIM (4*2) 1927 1928 static void 1929 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1930 { 1931 char *cp = (char *)sa; 1932 char *cplim = cp + size; 1933 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1934 1935 memset(cp, 0, size); 1936 cp++; 1937 do { 1938 if ((*addr >= '0') && (*addr <= '9')) { 1939 new = *addr - '0'; 1940 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1941 new = *addr - 'a' + 10; 1942 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1943 new = *addr - 'A' + 10; 1944 } else if (*addr == '\0') 1945 state |= END; 1946 else 1947 state |= DELIM; 1948 addr++; 1949 switch (state /* | INPUT */) { 1950 case GOTTWO | DIGIT: 1951 *cp++ = byte; /*FALLTHROUGH*/ 1952 case VIRGIN | DIGIT: 1953 state = GOTONE; byte = new; continue; 1954 case GOTONE | DIGIT: 1955 state = GOTTWO; byte = new + (byte << 4); continue; 1956 default: /* | DELIM */ 1957 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1958 case GOTONE | END: 1959 case GOTTWO | END: 1960 *cp++ = byte; /* FALLTHROUGH */ 1961 case VIRGIN | END: 1962 break; 1963 } 1964 break; 1965 } while (cp < cplim); 1966 sa->sa_len = cp - (char *)sa; 1967 } 1968