1 /* 2 * Copyright (c) 1983, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 39 #endif 40 #endif /* not lint */ 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/param.h> 46 #include <sys/file.h> 47 #include <sys/socket.h> 48 #include <sys/ioctl.h> 49 #include <sys/sysctl.h> 50 #include <sys/types.h> 51 #include <sys/queue.h> 52 53 #include <net/if.h> 54 #include <net/route.h> 55 #include <net/if_dl.h> 56 #include <netinet/in.h> 57 #include <netinet/if_ether.h> 58 #include <arpa/inet.h> 59 #include <netdb.h> 60 61 #include <ctype.h> 62 #include <err.h> 63 #include <errno.h> 64 #include <paths.h> 65 #include <signal.h> 66 #include <stdbool.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <sysexits.h> 71 #include <time.h> 72 #include <unistd.h> 73 #include <ifaddrs.h> 74 75 struct fibl { 76 TAILQ_ENTRY(fibl) fl_next; 77 78 int fl_num; 79 int fl_error; 80 int fl_errno; 81 }; 82 83 static struct keytab { 84 const char *kt_cp; 85 int kt_i; 86 } const keywords[] = { 87 #include "keywords.h" 88 {0, 0} 89 }; 90 91 static struct sockaddr_storage so[RTAX_MAX]; 92 static int pid, rtm_addrs; 93 static int s; 94 static int nflag, af, qflag, tflag; 95 static int verbose, aflen; 96 static int locking, lockrest, debugonly; 97 static struct rt_metrics rt_metrics; 98 static u_long rtm_inits; 99 static uid_t uid; 100 static int defaultfib; 101 static int numfibs; 102 static char domain[MAXHOSTNAMELEN + 1]; 103 static bool domain_initialized; 104 static int rtm_seq; 105 static char rt_line[NI_MAXHOST]; 106 static char net_line[MAXHOSTNAMELEN + 1]; 107 108 static struct { 109 struct rt_msghdr m_rtm; 110 char m_space[512]; 111 } m_rtmsg; 112 113 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 114 115 static void printb(int, const char *); 116 static void flushroutes(int argc, char *argv[]); 117 static int flushroutes_fib(int); 118 static int getaddr(int, char *, struct hostent **, int); 119 static int keyword(const char *); 120 #ifdef INET 121 static void inet_makenetandmask(u_long, struct sockaddr_in *, 122 struct sockaddr_in *, u_long); 123 #endif 124 #ifdef INET6 125 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 126 #endif 127 static void interfaces(void); 128 static void monitor(int, char*[]); 129 static const char *netname(struct sockaddr *); 130 static void newroute(int, char **); 131 static int newroute_fib(int, char *, int); 132 static void pmsg_addrs(char *, int, size_t); 133 static void pmsg_common(struct rt_msghdr *, size_t); 134 static int prefixlen(const char *); 135 static void print_getmsg(struct rt_msghdr *, int, int); 136 static void print_rtmsg(struct rt_msghdr *, size_t); 137 static const char *routename(struct sockaddr *); 138 static int rtmsg(int, int, int); 139 static void set_metric(char *, int); 140 static int set_sofib(int); 141 static void sockaddr(char *, struct sockaddr *, size_t); 142 static void sodump(struct sockaddr *, const char *); 143 static int fiboptlist_csv(const char *, struct fibl_head_t *); 144 static int fiboptlist_range(const char *, struct fibl_head_t *); 145 146 static void usage(const char *) __dead2; 147 148 #define READ_TIMEOUT 10 149 static volatile sig_atomic_t stop_read; 150 151 static void 152 stopit(int sig __unused) 153 { 154 155 stop_read = 1; 156 } 157 158 static void 159 usage(const char *cp) 160 { 161 if (cp != NULL) 162 warnx("bad keyword: %s", cp); 163 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 164 /* NOTREACHED */ 165 } 166 167 int 168 main(int argc, char **argv) 169 { 170 int ch; 171 size_t len; 172 173 if (argc < 2) 174 usage(NULL); 175 176 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 177 switch(ch) { 178 case '4': 179 #ifdef INET 180 af = AF_INET; 181 aflen = sizeof(struct sockaddr_in); 182 #else 183 errx(1, "IPv4 support is not compiled in"); 184 #endif 185 break; 186 case '6': 187 #ifdef INET6 188 af = AF_INET6; 189 aflen = sizeof(struct sockaddr_in6); 190 #else 191 errx(1, "IPv6 support is not compiled in"); 192 #endif 193 break; 194 case 'n': 195 nflag = 1; 196 break; 197 case 'q': 198 qflag = 1; 199 break; 200 case 'v': 201 verbose = 1; 202 break; 203 case 't': 204 tflag = 1; 205 break; 206 case 'd': 207 debugonly = 1; 208 break; 209 case '?': 210 default: 211 usage(NULL); 212 } 213 argc -= optind; 214 argv += optind; 215 216 pid = getpid(); 217 uid = geteuid(); 218 if (tflag) 219 s = open(_PATH_DEVNULL, O_WRONLY, 0); 220 else 221 s = socket(PF_ROUTE, SOCK_RAW, 0); 222 if (s < 0) 223 err(EX_OSERR, "socket"); 224 225 len = sizeof(numfibs); 226 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 227 numfibs = -1; 228 229 len = sizeof(defaultfib); 230 if (numfibs != -1 && 231 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 232 0) == -1) 233 defaultfib = -1; 234 235 if (*argv != NULL) 236 switch (keyword(*argv)) { 237 case K_GET: 238 case K_SHOW: 239 uid = 0; 240 /* FALLTHROUGH */ 241 242 case K_CHANGE: 243 case K_ADD: 244 case K_DEL: 245 case K_DELETE: 246 newroute(argc, argv); 247 /* NOTREACHED */ 248 249 case K_MONITOR: 250 monitor(argc, argv); 251 /* NOTREACHED */ 252 253 case K_FLUSH: 254 flushroutes(argc, argv); 255 exit(0); 256 /* NOTREACHED */ 257 } 258 usage(*argv); 259 /* NOTREACHED */ 260 } 261 262 static int 263 set_sofib(int fib) 264 { 265 266 if (fib < 0) 267 return (0); 268 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 269 sizeof(fib))); 270 } 271 272 static int 273 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 274 { 275 struct fibl *fl; 276 char *str0, *str, *token, *endptr; 277 int fib[2], i, error; 278 279 str0 = str = strdup(arg); 280 error = 0; 281 i = 0; 282 while ((token = strsep(&str, "-")) != NULL) { 283 switch (i) { 284 case 0: 285 case 1: 286 errno = 0; 287 fib[i] = strtol(token, &endptr, 0); 288 if (errno == 0) { 289 if (*endptr != '\0' || 290 fib[i] < 0 || 291 (numfibs != -1 && fib[i] > numfibs - 1)) 292 errno = EINVAL; 293 } 294 if (errno) 295 error = 1; 296 break; 297 default: 298 error = 1; 299 } 300 if (error) 301 goto fiboptlist_range_ret; 302 i++; 303 } 304 if (fib[0] >= fib[1]) { 305 error = 1; 306 goto fiboptlist_range_ret; 307 } 308 for (i = fib[0]; i <= fib[1]; i++) { 309 fl = calloc(1, sizeof(*fl)); 310 if (fl == NULL) { 311 error = 1; 312 goto fiboptlist_range_ret; 313 } 314 fl->fl_num = i; 315 TAILQ_INSERT_TAIL(flh, fl, fl_next); 316 } 317 fiboptlist_range_ret: 318 free(str0); 319 return (error); 320 } 321 322 #define ALLSTRLEN 64 323 static int 324 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 325 { 326 struct fibl *fl; 327 char *str0, *str, *token, *endptr; 328 int fib, error; 329 330 str0 = str = NULL; 331 if (strcmp("all", arg) == 0) { 332 str = calloc(1, ALLSTRLEN); 333 if (str == NULL) { 334 error = 1; 335 goto fiboptlist_csv_ret; 336 } 337 if (numfibs > 1) 338 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 339 else 340 snprintf(str, ALLSTRLEN - 1, "%d", 0); 341 } else if (strcmp("default", arg) == 0) { 342 str0 = str = calloc(1, ALLSTRLEN); 343 if (str == NULL) { 344 error = 1; 345 goto fiboptlist_csv_ret; 346 } 347 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 348 } else 349 str0 = str = strdup(arg); 350 351 error = 0; 352 while ((token = strsep(&str, ",")) != NULL) { 353 if (*token != '-' && strchr(token, '-') != NULL) { 354 error = fiboptlist_range(token, flh); 355 if (error) 356 goto fiboptlist_csv_ret; 357 } else { 358 errno = 0; 359 fib = strtol(token, &endptr, 0); 360 if (errno == 0) { 361 if (*endptr != '\0' || 362 fib < 0 || 363 (numfibs != -1 && fib > numfibs - 1)) 364 errno = EINVAL; 365 } 366 if (errno) { 367 error = 1; 368 goto fiboptlist_csv_ret; 369 } 370 fl = calloc(1, sizeof(*fl)); 371 if (fl == NULL) { 372 error = 1; 373 goto fiboptlist_csv_ret; 374 } 375 fl->fl_num = fib; 376 TAILQ_INSERT_TAIL(flh, fl, fl_next); 377 } 378 } 379 fiboptlist_csv_ret: 380 if (str0 != NULL) 381 free(str0); 382 return (error); 383 } 384 385 /* 386 * Purge all entries in the routing tables not 387 * associated with network interfaces. 388 */ 389 static void 390 flushroutes(int argc, char *argv[]) 391 { 392 struct fibl *fl; 393 int error; 394 395 if (uid != 0 && !debugonly && !tflag) 396 errx(EX_NOPERM, "must be root to alter routing table"); 397 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 398 399 TAILQ_INIT(&fibl_head); 400 while (argc > 1) { 401 argc--; 402 argv++; 403 if (**argv != '-') 404 usage(*argv); 405 switch (keyword(*argv + 1)) { 406 #ifdef INET 407 case K_4: 408 case K_INET: 409 af = AF_INET; 410 break; 411 #endif 412 #ifdef INET6 413 case K_6: 414 case K_INET6: 415 af = AF_INET6; 416 break; 417 #endif 418 case K_LINK: 419 af = AF_LINK; 420 break; 421 case K_FIB: 422 if (!--argc) 423 usage(*argv); 424 error = fiboptlist_csv(*++argv, &fibl_head); 425 if (error) 426 errx(EX_USAGE, "invalid fib number: %s", *argv); 427 break; 428 default: 429 usage(*argv); 430 } 431 } 432 if (TAILQ_EMPTY(&fibl_head)) { 433 error = fiboptlist_csv("default", &fibl_head); 434 if (error) 435 errx(EX_OSERR, "fiboptlist_csv failed."); 436 } 437 TAILQ_FOREACH(fl, &fibl_head, fl_next) 438 flushroutes_fib(fl->fl_num); 439 } 440 441 static int 442 flushroutes_fib(int fib) 443 { 444 struct rt_msghdr *rtm; 445 size_t needed; 446 char *buf, *next, *lim; 447 int mib[7], rlen, seqno, count = 0; 448 int error; 449 450 error = set_sofib(fib); 451 if (error) { 452 warn("fib number %d is ignored", fib); 453 return (error); 454 } 455 456 retry: 457 mib[0] = CTL_NET; 458 mib[1] = PF_ROUTE; 459 mib[2] = 0; /* protocol */ 460 mib[3] = AF_UNSPEC; 461 mib[4] = NET_RT_DUMP; 462 mib[5] = 0; /* no flags */ 463 mib[6] = fib; 464 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 465 err(EX_OSERR, "route-sysctl-estimate"); 466 if ((buf = malloc(needed)) == NULL) 467 errx(EX_OSERR, "malloc failed"); 468 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 469 if (errno == ENOMEM && count++ < 10) { 470 warnx("Routing table grew, retrying"); 471 sleep(1); 472 free(buf); 473 goto retry; 474 } 475 err(EX_OSERR, "route-sysctl-get"); 476 } 477 lim = buf + needed; 478 if (verbose) 479 (void)printf("Examining routing table from sysctl\n"); 480 seqno = 0; /* ??? */ 481 for (next = buf; next < lim; next += rtm->rtm_msglen) { 482 rtm = (struct rt_msghdr *)(void *)next; 483 if (verbose) 484 print_rtmsg(rtm, rtm->rtm_msglen); 485 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 486 continue; 487 if (af != 0) { 488 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 489 490 if (sa->sa_family != af) 491 continue; 492 } 493 if (debugonly) 494 continue; 495 rtm->rtm_type = RTM_DELETE; 496 rtm->rtm_seq = seqno; 497 rlen = write(s, next, rtm->rtm_msglen); 498 if (rlen < 0 && errno == EPERM) 499 err(1, "write to routing socket"); 500 if (rlen < (int)rtm->rtm_msglen) { 501 warn("write to routing socket"); 502 (void)printf("got only %d for rlen\n", rlen); 503 free(buf); 504 goto retry; 505 break; 506 } 507 seqno++; 508 if (qflag) 509 continue; 510 if (verbose) 511 print_rtmsg(rtm, rlen); 512 else { 513 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 514 515 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 516 routename(sa) : netname(sa)); 517 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 518 printf("%-20.20s ", routename(sa)); 519 if (fib >= 0) 520 printf("-fib %-3d ", fib); 521 printf("done\n"); 522 } 523 } 524 return (error); 525 } 526 527 static const char * 528 routename(struct sockaddr *sa) 529 { 530 struct sockaddr_dl *sdl; 531 const char *cp; 532 int n; 533 534 if (!domain_initialized) { 535 domain_initialized = true; 536 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 537 (cp = strchr(domain, '.'))) { 538 domain[MAXHOSTNAMELEN] = '\0'; 539 (void)strcpy(domain, cp + 1); 540 } else 541 domain[0] = '\0'; 542 } 543 544 /* If the address is zero-filled, use "default". */ 545 if (sa->sa_len == 0 && nflag == 0) 546 return ("default"); 547 #if defined(INET) || defined(INET6) 548 switch (sa->sa_family) { 549 #ifdef INET 550 case AF_INET: 551 /* If the address is zero-filled, use "default". */ 552 if (nflag == 0 && 553 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 554 INADDR_ANY) 555 return("default"); 556 break; 557 #endif 558 #ifdef INET6 559 case AF_INET6: 560 /* If the address is zero-filled, use "default". */ 561 if (nflag == 0 && 562 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 563 return("default"); 564 break; 565 #endif 566 } 567 #endif 568 569 switch (sa->sa_family) { 570 #if defined(INET) || defined(INET6) 571 #ifdef INET 572 case AF_INET: 573 #endif 574 #ifdef INET6 575 case AF_INET6: 576 #endif 577 { 578 struct sockaddr_storage ss; 579 int error; 580 char *p; 581 582 memset(&ss, 0, sizeof(ss)); 583 if (sa->sa_len == 0) 584 ss.ss_family = sa->sa_family; 585 else 586 memcpy(&ss, sa, sa->sa_len); 587 /* Expand sa->sa_len because it could be shortened. */ 588 if (sa->sa_family == AF_INET) 589 ss.ss_len = sizeof(struct sockaddr_in); 590 else if (sa->sa_family == AF_INET6) 591 ss.ss_len = sizeof(struct sockaddr_in6); 592 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 593 rt_line, sizeof(rt_line), NULL, 0, 594 (nflag == 0) ? 0 : NI_NUMERICHOST); 595 if (error) { 596 warnx("getnameinfo(): %s", gai_strerror(error)); 597 strncpy(rt_line, "invalid", sizeof(rt_line)); 598 } 599 600 /* Remove the domain part if any. */ 601 p = strchr(rt_line, '.'); 602 if (p != NULL && strcmp(p + 1, domain) == 0) 603 *p = '\0'; 604 605 return (rt_line); 606 break; 607 } 608 #endif 609 case AF_LINK: 610 sdl = (struct sockaddr_dl *)(void *)sa; 611 612 if (sdl->sdl_nlen == 0 && 613 sdl->sdl_alen == 0 && 614 sdl->sdl_slen == 0) { 615 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 616 sdl->sdl_index); 617 if (n > (int)sizeof(rt_line)) 618 rt_line[0] = '\0'; 619 return (rt_line); 620 } else 621 return (link_ntoa(sdl)); 622 break; 623 624 default: 625 { 626 u_short *sp = (u_short *)(void *)sa; 627 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 628 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 629 char *cpe = rt_line + sizeof(rt_line); 630 631 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 632 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 633 cps += n; 634 else 635 *cps = '\0'; 636 break; 637 } 638 } 639 return (rt_line); 640 } 641 642 /* 643 * Return the name of the network whose address is given. 644 * The address is assumed to be that of a net, not a host. 645 */ 646 static const char * 647 netname(struct sockaddr *sa) 648 { 649 struct sockaddr_dl *sdl; 650 int n; 651 #ifdef INET 652 struct netent *np = NULL; 653 const char *cp = NULL; 654 u_long i; 655 #endif 656 657 switch (sa->sa_family) { 658 #ifdef INET 659 case AF_INET: 660 { 661 struct in_addr in; 662 663 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 664 i = in.s_addr = ntohl(in.s_addr); 665 if (in.s_addr == 0) 666 cp = "default"; 667 else if (!nflag) { 668 np = getnetbyaddr(i, AF_INET); 669 if (np != NULL) 670 cp = np->n_name; 671 } 672 #define C(x) (unsigned)((x) & 0xff) 673 if (cp != NULL) 674 strncpy(net_line, cp, sizeof(net_line)); 675 else if ((in.s_addr & 0xffffff) == 0) 676 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 677 else if ((in.s_addr & 0xffff) == 0) 678 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 679 C(in.s_addr >> 16)); 680 else if ((in.s_addr & 0xff) == 0) 681 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 682 C(in.s_addr >> 16), C(in.s_addr >> 8)); 683 else 684 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 685 C(in.s_addr >> 16), C(in.s_addr >> 8), 686 C(in.s_addr)); 687 #undef C 688 break; 689 } 690 #endif 691 #ifdef INET6 692 case AF_INET6: 693 { 694 struct sockaddr_in6 sin6; 695 int niflags = 0; 696 697 memset(&sin6, 0, sizeof(sin6)); 698 memcpy(&sin6, sa, sa->sa_len); 699 sin6.sin6_len = sizeof(sin6); 700 sin6.sin6_family = AF_INET6; 701 if (nflag) 702 niflags |= NI_NUMERICHOST; 703 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 704 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 705 strncpy(net_line, "invalid", sizeof(net_line)); 706 707 return(net_line); 708 } 709 #endif 710 case AF_LINK: 711 sdl = (struct sockaddr_dl *)(void *)sa; 712 713 if (sdl->sdl_nlen == 0 && 714 sdl->sdl_alen == 0 && 715 sdl->sdl_slen == 0) { 716 n = snprintf(net_line, sizeof(net_line), "link#%d", 717 sdl->sdl_index); 718 if (n > (int)sizeof(net_line)) 719 net_line[0] = '\0'; 720 return (net_line); 721 } else 722 return (link_ntoa(sdl)); 723 break; 724 725 default: 726 { 727 u_short *sp = (u_short *)(void *)sa->sa_data; 728 u_short *splim = sp + ((sa->sa_len + 1)>>1); 729 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 730 char *cpe = net_line + sizeof(net_line); 731 732 while (sp < splim && cps < cpe) 733 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 734 cps += n; 735 else 736 *cps = '\0'; 737 break; 738 } 739 } 740 return (net_line); 741 } 742 743 static void 744 set_metric(char *value, int key) 745 { 746 int flag = 0; 747 char *endptr; 748 u_long noval, *valp = &noval; 749 750 switch (key) { 751 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 752 caseof(K_MTU, RTV_MTU, rmx_mtu); 753 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 754 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 755 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 756 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 757 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 758 caseof(K_RTT, RTV_RTT, rmx_rtt); 759 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 760 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 761 } 762 rtm_inits |= flag; 763 if (lockrest || locking) 764 rt_metrics.rmx_locks |= flag; 765 if (locking) 766 locking = 0; 767 errno = 0; 768 *valp = strtol(value, &endptr, 0); 769 if (errno == 0 && *endptr != '\0') 770 errno = EINVAL; 771 if (errno) 772 err(EX_USAGE, "%s", value); 773 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 774 struct timespec ts; 775 776 clock_gettime(CLOCK_REALTIME_FAST, &ts); 777 *valp += ts.tv_sec; 778 } 779 } 780 781 #define F_ISHOST 0x01 782 #define F_FORCENET 0x02 783 #define F_FORCEHOST 0x04 784 #define F_PROXY 0x08 785 #define F_INTERFACE 0x10 786 787 static void 788 newroute(int argc, char **argv) 789 { 790 struct sigaction sa; 791 struct hostent *hp; 792 struct fibl *fl; 793 char *cmd; 794 const char *dest, *gateway, *errmsg; 795 int key, error, flags, nrflags, fibnum; 796 797 if (uid != 0 && !debugonly && !tflag) 798 errx(EX_NOPERM, "must be root to alter routing table"); 799 dest = NULL; 800 gateway = NULL; 801 flags = RTF_STATIC; 802 nrflags = 0; 803 hp = NULL; 804 TAILQ_INIT(&fibl_head); 805 806 sigemptyset(&sa.sa_mask); 807 sa.sa_flags = 0; 808 sa.sa_handler = stopit; 809 if (sigaction(SIGALRM, &sa, 0) == -1) 810 warn("sigaction SIGALRM"); 811 812 cmd = argv[0]; 813 if (*cmd != 'g' && *cmd != 's') 814 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 815 while (--argc > 0) { 816 if (**(++argv)== '-') { 817 switch (key = keyword(1 + *argv)) { 818 case K_LINK: 819 af = AF_LINK; 820 aflen = sizeof(struct sockaddr_dl); 821 break; 822 #ifdef INET 823 case K_4: 824 case K_INET: 825 af = AF_INET; 826 aflen = sizeof(struct sockaddr_in); 827 break; 828 #endif 829 #ifdef INET6 830 case K_6: 831 case K_INET6: 832 af = AF_INET6; 833 aflen = sizeof(struct sockaddr_in6); 834 break; 835 #endif 836 case K_SA: 837 af = PF_ROUTE; 838 aflen = sizeof(struct sockaddr_storage); 839 break; 840 case K_IFACE: 841 case K_INTERFACE: 842 nrflags |= F_INTERFACE; 843 break; 844 case K_NOSTATIC: 845 flags &= ~RTF_STATIC; 846 break; 847 case K_LOCK: 848 locking = 1; 849 break; 850 case K_LOCKREST: 851 lockrest = 1; 852 break; 853 case K_HOST: 854 nrflags |= F_FORCEHOST; 855 break; 856 case K_REJECT: 857 flags |= RTF_REJECT; 858 break; 859 case K_BLACKHOLE: 860 flags |= RTF_BLACKHOLE; 861 break; 862 case K_PROTO1: 863 flags |= RTF_PROTO1; 864 break; 865 case K_PROTO2: 866 flags |= RTF_PROTO2; 867 break; 868 case K_PROXY: 869 nrflags |= F_PROXY; 870 break; 871 case K_XRESOLVE: 872 flags |= RTF_XRESOLVE; 873 break; 874 case K_STATIC: 875 flags |= RTF_STATIC; 876 break; 877 case K_STICKY: 878 flags |= RTF_STICKY; 879 break; 880 case K_NOSTICK: 881 flags &= ~RTF_STICKY; 882 break; 883 case K_FIB: 884 if (!--argc) 885 usage(NULL); 886 error = fiboptlist_csv(*++argv, &fibl_head); 887 if (error) 888 errx(EX_USAGE, 889 "invalid fib number: %s", *argv); 890 break; 891 case K_IFA: 892 if (!--argc) 893 usage(NULL); 894 getaddr(RTAX_IFA, *++argv, 0, nrflags); 895 break; 896 case K_IFP: 897 if (!--argc) 898 usage(NULL); 899 getaddr(RTAX_IFP, *++argv, 0, nrflags); 900 break; 901 case K_GENMASK: 902 if (!--argc) 903 usage(NULL); 904 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 905 break; 906 case K_GATEWAY: 907 if (!--argc) 908 usage(NULL); 909 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 910 gateway = *argv; 911 break; 912 case K_DST: 913 if (!--argc) 914 usage(NULL); 915 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 916 nrflags |= F_ISHOST; 917 dest = *argv; 918 break; 919 case K_NETMASK: 920 if (!--argc) 921 usage(NULL); 922 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 923 /* FALLTHROUGH */ 924 case K_NET: 925 nrflags |= F_FORCENET; 926 break; 927 case K_PREFIXLEN: 928 if (!--argc) 929 usage(NULL); 930 if (prefixlen(*++argv) == -1) { 931 nrflags &= ~F_FORCENET; 932 nrflags |= F_ISHOST; 933 } else { 934 nrflags |= F_FORCENET; 935 nrflags &= ~F_ISHOST; 936 } 937 break; 938 case K_MTU: 939 case K_HOPCOUNT: 940 case K_EXPIRE: 941 case K_RECVPIPE: 942 case K_SENDPIPE: 943 case K_SSTHRESH: 944 case K_RTT: 945 case K_RTTVAR: 946 case K_WEIGHT: 947 if (!--argc) 948 usage(NULL); 949 set_metric(*++argv, key); 950 break; 951 default: 952 usage(1+*argv); 953 } 954 } else { 955 if ((rtm_addrs & RTA_DST) == 0) { 956 dest = *argv; 957 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 958 nrflags |= F_ISHOST; 959 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 960 gateway = *argv; 961 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 962 } else { 963 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 964 nrflags |= F_FORCENET; 965 } 966 } 967 } 968 969 /* Do some sanity checks on resulting request */ 970 if (so[RTAX_DST].ss_len == 0) { 971 warnx("destination parameter required"); 972 usage(NULL); 973 } 974 975 if (so[RTAX_NETMASK].ss_len != 0 && 976 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 977 warnx("destination and netmask family need to be the same"); 978 usage(NULL); 979 } 980 981 if (nrflags & F_FORCEHOST) { 982 nrflags |= F_ISHOST; 983 #ifdef INET6 984 if (af == AF_INET6) { 985 rtm_addrs &= ~RTA_NETMASK; 986 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 987 } 988 #endif 989 } 990 if (nrflags & F_FORCENET) 991 nrflags &= ~F_ISHOST; 992 flags |= RTF_UP; 993 if (nrflags & F_ISHOST) 994 flags |= RTF_HOST; 995 if ((nrflags & F_INTERFACE) == 0) 996 flags |= RTF_GATEWAY; 997 if (nrflags & F_PROXY) 998 flags |= RTF_ANNOUNCE; 999 if (dest == NULL) 1000 dest = ""; 1001 if (gateway == NULL) 1002 gateway = ""; 1003 1004 if (TAILQ_EMPTY(&fibl_head)) { 1005 error = fiboptlist_csv("default", &fibl_head); 1006 if (error) 1007 errx(EX_OSERR, "fiboptlist_csv failed."); 1008 } 1009 error = 0; 1010 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1011 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1012 if (fl->fl_error) 1013 fl->fl_errno = errno; 1014 error += fl->fl_error; 1015 } 1016 if (*cmd == 'g' || *cmd == 's') 1017 exit(error); 1018 1019 error = 0; 1020 if (!qflag) { 1021 fibnum = 0; 1022 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1023 if (fl->fl_error == 0) 1024 fibnum++; 1025 } 1026 if (fibnum > 0) { 1027 int firstfib = 1; 1028 1029 printf("%s %s %s", cmd, 1030 (nrflags & F_ISHOST) ? "host" : "net", dest); 1031 if (*gateway) 1032 printf(": gateway %s", gateway); 1033 1034 if (numfibs > 1) { 1035 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1036 if (fl->fl_error == 0 1037 && fl->fl_num >= 0) { 1038 if (firstfib) { 1039 printf(" fib "); 1040 firstfib = 0; 1041 } 1042 printf("%d", fl->fl_num); 1043 if (fibnum-- > 1) 1044 printf(","); 1045 } 1046 } 1047 } 1048 printf("\n"); 1049 } 1050 1051 fibnum = 0; 1052 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1053 if (fl->fl_error != 0) { 1054 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1055 ? "host" : "net", dest); 1056 if (*gateway) 1057 printf(": gateway %s", gateway); 1058 1059 if (fl->fl_num >= 0) 1060 printf(" fib %d", fl->fl_num); 1061 1062 switch (fl->fl_errno) { 1063 case ESRCH: 1064 errmsg = "not in table"; 1065 break; 1066 case EBUSY: 1067 errmsg = "entry in use"; 1068 break; 1069 case ENOBUFS: 1070 errmsg = "not enough memory"; 1071 break; 1072 case EADDRINUSE: 1073 /* 1074 * handle recursion avoidance 1075 * in rt_setgate() 1076 */ 1077 errmsg = "gateway uses the same route"; 1078 break; 1079 case EEXIST: 1080 errmsg = "route already in table"; 1081 break; 1082 default: 1083 errmsg = strerror(fl->fl_errno); 1084 break; 1085 } 1086 printf(": %s\n", errmsg); 1087 error = 1; 1088 } 1089 } 1090 } 1091 exit(error); 1092 } 1093 1094 static int 1095 newroute_fib(int fib, char *cmd, int flags) 1096 { 1097 int error; 1098 1099 error = set_sofib(fib); 1100 if (error) { 1101 warn("fib number %d is ignored", fib); 1102 return (error); 1103 } 1104 1105 error = rtmsg(*cmd, flags, fib); 1106 return (error); 1107 } 1108 1109 #ifdef INET 1110 static void 1111 inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1112 struct sockaddr_in *sin_mask, u_long bits) 1113 { 1114 u_long mask = 0; 1115 1116 rtm_addrs |= RTA_NETMASK; 1117 1118 /* 1119 * MSB of net should be meaningful. 0/0 is exception. 1120 */ 1121 if (net > 0) 1122 while ((net & 0xff000000) == 0) 1123 net <<= 8; 1124 1125 /* 1126 * If no /xx was specified we must calculate the 1127 * CIDR address. 1128 */ 1129 if ((bits == 0) && (net != 0)) { 1130 u_long i, j; 1131 1132 for(i = 0, j = 0xff; i < 4; i++) { 1133 if (net & j) { 1134 break; 1135 } 1136 j <<= 8; 1137 } 1138 /* i holds the first non zero bit */ 1139 bits = 32 - (i*8); 1140 } 1141 if (bits != 0) 1142 mask = 0xffffffff << (32 - bits); 1143 1144 sin->sin_addr.s_addr = htonl(net); 1145 sin_mask->sin_addr.s_addr = htonl(mask); 1146 sin_mask->sin_len = sizeof(struct sockaddr_in); 1147 sin_mask->sin_family = AF_INET; 1148 } 1149 #endif 1150 1151 #ifdef INET6 1152 /* 1153 * XXX the function may need more improvement... 1154 */ 1155 static int 1156 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1157 { 1158 1159 if (plen == NULL) { 1160 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1161 sin6->sin6_scope_id == 0) 1162 plen = "0"; 1163 } 1164 1165 if (plen == NULL || strcmp(plen, "128") == 0) 1166 return (1); 1167 rtm_addrs |= RTA_NETMASK; 1168 prefixlen(plen); 1169 return (0); 1170 } 1171 #endif 1172 1173 /* 1174 * Interpret an argument as a network address of some kind, 1175 * returning 1 if a host address, 0 if a network address. 1176 */ 1177 static int 1178 getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1179 { 1180 struct sockaddr *sa; 1181 #if defined(INET) 1182 struct sockaddr_in *sin; 1183 struct hostent *hp; 1184 struct netent *np; 1185 u_long val; 1186 char *q; 1187 #elif defined(INET6) 1188 char *q; 1189 #endif 1190 1191 if (idx < 0 || idx >= RTAX_MAX) 1192 usage("internal error"); 1193 if (af == 0) { 1194 #if defined(INET) 1195 af = AF_INET; 1196 aflen = sizeof(struct sockaddr_in); 1197 #elif defined(INET6) 1198 af = AF_INET6; 1199 aflen = sizeof(struct sockaddr_in6); 1200 #else 1201 af = AF_LINK; 1202 aflen = sizeof(struct sockaddr_dl); 1203 #endif 1204 } 1205 #ifndef INET 1206 hpp = NULL; 1207 #endif 1208 rtm_addrs |= (1 << idx); 1209 sa = (struct sockaddr *)&so[idx]; 1210 sa->sa_family = af; 1211 sa->sa_len = aflen; 1212 1213 switch (idx) { 1214 case RTAX_GATEWAY: 1215 if (nrflags & F_INTERFACE) { 1216 struct ifaddrs *ifap, *ifa; 1217 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1218 struct sockaddr_dl *sdl = NULL; 1219 1220 if (getifaddrs(&ifap)) 1221 err(EX_OSERR, "getifaddrs"); 1222 1223 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1224 if (ifa->ifa_addr->sa_family != AF_LINK) 1225 continue; 1226 1227 if (strcmp(str, ifa->ifa_name) != 0) 1228 continue; 1229 1230 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1231 } 1232 /* If we found it, then use it */ 1233 if (sdl != NULL) { 1234 /* 1235 * Note that we need to copy before calling 1236 * freeifaddrs(). 1237 */ 1238 memcpy(sdl0, sdl, sdl->sdl_len); 1239 } 1240 freeifaddrs(ifap); 1241 if (sdl != NULL) 1242 return(1); 1243 else 1244 errx(EX_DATAERR, 1245 "interface '%s' does not exist", str); 1246 } 1247 break; 1248 case RTAX_IFP: 1249 sa->sa_family = AF_LINK; 1250 break; 1251 } 1252 if (strcmp(str, "default") == 0) { 1253 /* 1254 * Default is net 0.0.0.0/0 1255 */ 1256 switch (idx) { 1257 case RTAX_DST: 1258 nrflags |= F_FORCENET; 1259 getaddr(RTAX_NETMASK, str, 0, nrflags); 1260 break; 1261 } 1262 return (0); 1263 } 1264 switch (sa->sa_family) { 1265 #ifdef INET6 1266 case AF_INET6: 1267 { 1268 struct addrinfo hints, *res; 1269 int ecode; 1270 1271 q = NULL; 1272 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1273 *q = '\0'; 1274 memset(&hints, 0, sizeof(hints)); 1275 hints.ai_family = sa->sa_family; 1276 hints.ai_socktype = SOCK_DGRAM; 1277 ecode = getaddrinfo(str, NULL, &hints, &res); 1278 if (ecode != 0 || res->ai_family != AF_INET6 || 1279 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1280 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1281 memcpy(sa, res->ai_addr, res->ai_addrlen); 1282 freeaddrinfo(res); 1283 if (q != NULL) 1284 *q++ = '/'; 1285 if (idx == RTAX_DST) 1286 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1287 return (0); 1288 } 1289 #endif /* INET6 */ 1290 case AF_LINK: 1291 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1292 return (1); 1293 1294 case PF_ROUTE: 1295 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1296 return (1); 1297 #ifdef INET 1298 case AF_INET: 1299 #endif 1300 default: 1301 break; 1302 } 1303 1304 #ifdef INET 1305 sin = (struct sockaddr_in *)(void *)sa; 1306 if (hpp == NULL) 1307 hpp = &hp; 1308 *hpp = NULL; 1309 1310 q = strchr(str,'/'); 1311 if (q != NULL && idx == RTAX_DST) { 1312 *q = '\0'; 1313 if ((val = inet_network(str)) != INADDR_NONE) { 1314 inet_makenetandmask(val, sin, 1315 (struct sockaddr_in *)&so[RTAX_NETMASK], 1316 strtoul(q+1, 0, 0)); 1317 return (0); 1318 } 1319 *q = '/'; 1320 } 1321 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1322 inet_aton(str, &sin->sin_addr)) { 1323 val = sin->sin_addr.s_addr; 1324 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1325 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1326 return (1); 1327 else { 1328 val = ntohl(val); 1329 goto netdone; 1330 } 1331 } 1332 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1333 ((val = inet_network(str)) != INADDR_NONE || 1334 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1335 netdone: 1336 inet_makenetandmask(val, sin, 1337 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1338 return (0); 1339 } 1340 hp = gethostbyname(str); 1341 if (hp != NULL) { 1342 *hpp = hp; 1343 sin->sin_family = hp->h_addrtype; 1344 memmove((char *)&sin->sin_addr, hp->h_addr, 1345 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1346 return (1); 1347 } 1348 #endif 1349 errx(EX_NOHOST, "bad address: %s", str); 1350 } 1351 1352 static int 1353 prefixlen(const char *str) 1354 { 1355 int len = atoi(str), q, r; 1356 int max; 1357 char *p; 1358 1359 rtm_addrs |= RTA_NETMASK; 1360 switch (af) { 1361 #ifdef INET6 1362 case AF_INET6: 1363 { 1364 struct sockaddr_in6 *sin6 = 1365 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1366 1367 max = 128; 1368 p = (char *)&sin6->sin6_addr; 1369 sin6->sin6_family = AF_INET6; 1370 sin6->sin6_len = sizeof(*sin6); 1371 break; 1372 } 1373 #endif 1374 #ifdef INET 1375 case AF_INET: 1376 { 1377 struct sockaddr_in *sin = 1378 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1379 1380 max = 32; 1381 p = (char *)&sin->sin_addr; 1382 sin->sin_family = AF_INET; 1383 sin->sin_len = sizeof(*sin); 1384 break; 1385 } 1386 #endif 1387 default: 1388 errx(EX_OSERR, "prefixlen not supported in this af"); 1389 } 1390 1391 if (len < 0 || max < len) 1392 errx(EX_USAGE, "%s: invalid prefixlen", str); 1393 1394 q = len >> 3; 1395 r = len & 7; 1396 memset((void *)p, 0, max / 8); 1397 if (q > 0) 1398 memset((void *)p, 0xff, q); 1399 if (r > 0) 1400 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1401 if (len == max) 1402 return (-1); 1403 else 1404 return (len); 1405 } 1406 1407 static void 1408 interfaces(void) 1409 { 1410 size_t needed; 1411 int mib[6]; 1412 char *buf, *lim, *next, count = 0; 1413 struct rt_msghdr *rtm; 1414 1415 retry2: 1416 mib[0] = CTL_NET; 1417 mib[1] = PF_ROUTE; 1418 mib[2] = 0; /* protocol */ 1419 mib[3] = AF_UNSPEC; 1420 mib[4] = NET_RT_IFLIST; 1421 mib[5] = 0; /* no flags */ 1422 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1423 err(EX_OSERR, "route-sysctl-estimate"); 1424 if ((buf = malloc(needed)) == NULL) 1425 errx(EX_OSERR, "malloc failed"); 1426 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1427 if (errno == ENOMEM && count++ < 10) { 1428 warnx("Routing table grew, retrying"); 1429 sleep(1); 1430 free(buf); 1431 goto retry2; 1432 } 1433 err(EX_OSERR, "actual retrieval of interface table"); 1434 } 1435 lim = buf + needed; 1436 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1437 rtm = (struct rt_msghdr *)(void *)next; 1438 print_rtmsg(rtm, rtm->rtm_msglen); 1439 } 1440 } 1441 1442 static void 1443 monitor(int argc, char *argv[]) 1444 { 1445 int n, fib, error; 1446 char msg[2048], *endptr; 1447 1448 fib = defaultfib; 1449 while (argc > 1) { 1450 argc--; 1451 argv++; 1452 if (**argv != '-') 1453 usage(*argv); 1454 switch (keyword(*argv + 1)) { 1455 case K_FIB: 1456 if (!--argc) 1457 usage(*argv); 1458 errno = 0; 1459 fib = strtol(*++argv, &endptr, 0); 1460 if (errno == 0) { 1461 if (*endptr != '\0' || 1462 fib < 0 || 1463 (numfibs != -1 && fib > numfibs - 1)) 1464 errno = EINVAL; 1465 } 1466 if (errno) 1467 errx(EX_USAGE, "invalid fib number: %s", *argv); 1468 break; 1469 default: 1470 usage(*argv); 1471 } 1472 } 1473 error = set_sofib(fib); 1474 if (error) 1475 errx(EX_USAGE, "invalid fib number: %d", fib); 1476 1477 verbose = 1; 1478 if (debugonly) { 1479 interfaces(); 1480 exit(0); 1481 } 1482 for (;;) { 1483 time_t now; 1484 n = read(s, msg, 2048); 1485 now = time(NULL); 1486 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1487 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1488 } 1489 } 1490 1491 static int 1492 rtmsg(int cmd, int flags, int fib) 1493 { 1494 int rlen; 1495 char *cp = m_rtmsg.m_space; 1496 int l; 1497 1498 #define NEXTADDR(w, u) \ 1499 if (rtm_addrs & (w)) { \ 1500 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1501 sizeof(long) : \ 1502 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1503 | (sizeof(long) - 1)); \ 1504 memmove(cp, (char *)&(u), l); \ 1505 cp += l; \ 1506 if (verbose) \ 1507 sodump((struct sockaddr *)&(u), #w); \ 1508 } 1509 1510 errno = 0; 1511 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1512 if (cmd == 'a') 1513 cmd = RTM_ADD; 1514 else if (cmd == 'c') 1515 cmd = RTM_CHANGE; 1516 else if (cmd == 'g' || cmd == 's') { 1517 cmd = RTM_GET; 1518 if (so[RTAX_IFP].ss_family == 0) { 1519 so[RTAX_IFP].ss_family = AF_LINK; 1520 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1521 rtm_addrs |= RTA_IFP; 1522 } 1523 } else 1524 cmd = RTM_DELETE; 1525 #define rtm m_rtmsg.m_rtm 1526 rtm.rtm_type = cmd; 1527 rtm.rtm_flags = flags; 1528 rtm.rtm_version = RTM_VERSION; 1529 rtm.rtm_seq = ++rtm_seq; 1530 rtm.rtm_addrs = rtm_addrs; 1531 rtm.rtm_rmx = rt_metrics; 1532 rtm.rtm_inits = rtm_inits; 1533 1534 NEXTADDR(RTA_DST, so[RTAX_DST]); 1535 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1536 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1537 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1538 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1539 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1540 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1541 if (verbose) 1542 print_rtmsg(&rtm, l); 1543 if (debugonly) 1544 return (0); 1545 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1546 switch (errno) { 1547 case EPERM: 1548 err(1, "writing to routing socket"); 1549 break; 1550 case ESRCH: 1551 warnx("route has not been found"); 1552 break; 1553 case EEXIST: 1554 /* Handled by newroute() */ 1555 break; 1556 default: 1557 warn("writing to routing socket"); 1558 } 1559 return (-1); 1560 } 1561 if (cmd == RTM_GET) { 1562 stop_read = 0; 1563 alarm(READ_TIMEOUT); 1564 do { 1565 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1566 } while (l > 0 && stop_read == 0 && 1567 (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid)); 1568 if (stop_read != 0) { 1569 warnx("read from routing socket timed out"); 1570 return (-1); 1571 } else 1572 alarm(0); 1573 if (l < 0) 1574 warn("read from routing socket"); 1575 else 1576 print_getmsg(&rtm, l, fib); 1577 } 1578 #undef rtm 1579 return (0); 1580 } 1581 1582 static const char *const msgtypes[] = { 1583 "", 1584 "RTM_ADD: Add Route", 1585 "RTM_DELETE: Delete Route", 1586 "RTM_CHANGE: Change Metrics or flags", 1587 "RTM_GET: Report Metrics", 1588 "RTM_LOSING: Kernel Suspects Partitioning", 1589 "RTM_REDIRECT: Told to use different route", 1590 "RTM_MISS: Lookup failed on this address", 1591 "RTM_LOCK: fix specified metrics", 1592 "RTM_OLDADD: caused by SIOCADDRT", 1593 "RTM_OLDDEL: caused by SIOCDELRT", 1594 "RTM_RESOLVE: Route created by cloning", 1595 "RTM_NEWADDR: address being added to iface", 1596 "RTM_DELADDR: address being removed from iface", 1597 "RTM_IFINFO: iface status change", 1598 "RTM_NEWMADDR: new multicast group membership on iface", 1599 "RTM_DELMADDR: multicast group membership removed from iface", 1600 "RTM_IFANNOUNCE: interface arrival/departure", 1601 "RTM_IEEE80211: IEEE 802.11 wireless event", 1602 }; 1603 1604 static const char metricnames[] = 1605 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1606 "\1mtu"; 1607 static const char routeflags[] = 1608 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1609 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1610 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1611 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1612 static const char ifnetflags[] = 1613 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1614 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1615 "\017LINK2\020MULTICAST"; 1616 static const char addrnames[] = 1617 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1618 1619 static const char errfmt[] = 1620 "\n%s: truncated route message, only %zu bytes left\n"; 1621 1622 static void 1623 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1624 { 1625 struct if_msghdr *ifm; 1626 struct ifa_msghdr *ifam; 1627 #ifdef RTM_NEWMADDR 1628 struct ifma_msghdr *ifmam; 1629 #endif 1630 struct if_announcemsghdr *ifan; 1631 const char *state; 1632 1633 if (verbose == 0) 1634 return; 1635 if (rtm->rtm_version != RTM_VERSION) { 1636 (void)printf("routing message version %d not understood\n", 1637 rtm->rtm_version); 1638 return; 1639 } 1640 if (rtm->rtm_type < nitems(msgtypes)) 1641 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1642 else 1643 (void)printf("unknown type %d: ", rtm->rtm_type); 1644 (void)printf("len %d, ", rtm->rtm_msglen); 1645 1646 #define REQUIRE(x) do { \ 1647 if (msglen < sizeof(x)) \ 1648 goto badlen; \ 1649 else \ 1650 msglen -= sizeof(x); \ 1651 } while (0) 1652 1653 switch (rtm->rtm_type) { 1654 case RTM_IFINFO: 1655 REQUIRE(struct if_msghdr); 1656 ifm = (struct if_msghdr *)rtm; 1657 (void)printf("if# %d, ", ifm->ifm_index); 1658 switch (ifm->ifm_data.ifi_link_state) { 1659 case LINK_STATE_DOWN: 1660 state = "down"; 1661 break; 1662 case LINK_STATE_UP: 1663 state = "up"; 1664 break; 1665 default: 1666 state = "unknown"; 1667 break; 1668 } 1669 (void)printf("link: %s, flags:", state); 1670 printb(ifm->ifm_flags, ifnetflags); 1671 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1672 break; 1673 case RTM_NEWADDR: 1674 case RTM_DELADDR: 1675 REQUIRE(struct ifa_msghdr); 1676 ifam = (struct ifa_msghdr *)rtm; 1677 (void)printf("metric %d, flags:", ifam->ifam_metric); 1678 printb(ifam->ifam_flags, routeflags); 1679 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1680 break; 1681 #ifdef RTM_NEWMADDR 1682 case RTM_NEWMADDR: 1683 case RTM_DELMADDR: 1684 REQUIRE(struct ifma_msghdr); 1685 ifmam = (struct ifma_msghdr *)rtm; 1686 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1687 break; 1688 #endif 1689 case RTM_IFANNOUNCE: 1690 REQUIRE(struct if_announcemsghdr); 1691 ifan = (struct if_announcemsghdr *)rtm; 1692 (void)printf("if# %d, what: ", ifan->ifan_index); 1693 switch (ifan->ifan_what) { 1694 case IFAN_ARRIVAL: 1695 (void)printf("arrival"); 1696 break; 1697 case IFAN_DEPARTURE: 1698 printf("departure"); 1699 break; 1700 default: 1701 printf("#%d", ifan->ifan_what); 1702 break; 1703 } 1704 printf("\n"); 1705 fflush(stdout); 1706 break; 1707 1708 default: 1709 printf("pid: %ld, seq %d, errno %d, flags:", 1710 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1711 printb(rtm->rtm_flags, routeflags); 1712 pmsg_common(rtm, msglen); 1713 } 1714 1715 return; 1716 1717 badlen: 1718 (void)printf(errfmt, __func__, msglen); 1719 #undef REQUIRE 1720 } 1721 1722 static void 1723 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1724 { 1725 struct sockaddr *sp[RTAX_MAX]; 1726 struct timespec ts; 1727 char *cp; 1728 int i; 1729 1730 memset(sp, 0, sizeof(sp)); 1731 (void)printf(" route to: %s\n", 1732 routename((struct sockaddr *)&so[RTAX_DST])); 1733 if (rtm->rtm_version != RTM_VERSION) { 1734 warnx("routing message version %d not understood", 1735 rtm->rtm_version); 1736 return; 1737 } 1738 if (rtm->rtm_msglen > msglen) { 1739 warnx("message length mismatch, in packet %d, returned %d", 1740 rtm->rtm_msglen, msglen); 1741 return; 1742 } 1743 if (rtm->rtm_errno) { 1744 errno = rtm->rtm_errno; 1745 warn("message indicates error %d", errno); 1746 return; 1747 } 1748 cp = ((char *)(rtm + 1)); 1749 for (i = 0; i < RTAX_MAX; i++) 1750 if (rtm->rtm_addrs & (1 << i)) { 1751 sp[i] = (struct sockaddr *)cp; 1752 cp += SA_SIZE((struct sockaddr *)cp); 1753 } 1754 if ((rtm->rtm_addrs & RTA_IFP) && 1755 (sp[RTAX_IFP]->sa_family != AF_LINK || 1756 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1757 sp[RTAX_IFP] = NULL; 1758 if (sp[RTAX_DST]) 1759 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1760 if (sp[RTAX_NETMASK]) 1761 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1762 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1763 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1764 if (fib >= 0) 1765 (void)printf(" fib: %u\n", (unsigned int)fib); 1766 if (sp[RTAX_IFP]) 1767 (void)printf(" interface: %.*s\n", 1768 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1769 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1770 (void)printf(" flags: "); 1771 printb(rtm->rtm_flags, routeflags); 1772 1773 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1774 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1775 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1776 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1777 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1778 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1779 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1780 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1781 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1782 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1783 if (rtm->rtm_rmx.rmx_expire > 0) 1784 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1785 else 1786 ts.tv_sec = 0; 1787 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1788 lock(EXPIRE)); 1789 #undef lock 1790 #undef msec 1791 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1792 if (verbose) 1793 pmsg_common(rtm, msglen); 1794 else if (rtm->rtm_addrs &~ RTA_IGN) { 1795 (void)printf("sockaddrs: "); 1796 printb(rtm->rtm_addrs, addrnames); 1797 putchar('\n'); 1798 } 1799 #undef RTA_IGN 1800 } 1801 1802 static void 1803 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1804 { 1805 1806 (void)printf("\nlocks: "); 1807 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1808 (void)printf(" inits: "); 1809 printb(rtm->rtm_inits, metricnames); 1810 if (msglen > sizeof(struct rt_msghdr)) 1811 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1812 msglen - sizeof(struct rt_msghdr)); 1813 else 1814 (void)fflush(stdout); 1815 } 1816 1817 static void 1818 pmsg_addrs(char *cp, int addrs, size_t len) 1819 { 1820 struct sockaddr *sa; 1821 int i; 1822 1823 if (addrs == 0) { 1824 (void)putchar('\n'); 1825 return; 1826 } 1827 (void)printf("\nsockaddrs: "); 1828 printb(addrs, addrnames); 1829 putchar('\n'); 1830 for (i = 0; i < RTAX_MAX; i++) 1831 if (addrs & (1 << i)) { 1832 sa = (struct sockaddr *)cp; 1833 if (len == 0 || len < SA_SIZE(sa)) { 1834 (void)printf(errfmt, __func__, len); 1835 break; 1836 } 1837 (void)printf(" %s", routename(sa)); 1838 len -= SA_SIZE(sa); 1839 cp += SA_SIZE(sa); 1840 } 1841 (void)putchar('\n'); 1842 (void)fflush(stdout); 1843 } 1844 1845 static void 1846 printb(int b, const char *str) 1847 { 1848 int i; 1849 int gotsome = 0; 1850 1851 if (b == 0) 1852 return; 1853 while ((i = *str++) != 0) { 1854 if (b & (1 << (i-1))) { 1855 if (gotsome == 0) 1856 i = '<'; 1857 else 1858 i = ','; 1859 putchar(i); 1860 gotsome = 1; 1861 for (; (i = *str) > 32; str++) 1862 putchar(i); 1863 } else 1864 while (*str > 32) 1865 str++; 1866 } 1867 if (gotsome) 1868 putchar('>'); 1869 } 1870 1871 int 1872 keyword(const char *cp) 1873 { 1874 const struct keytab *kt = keywords; 1875 1876 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1877 kt++; 1878 return (kt->kt_i); 1879 } 1880 1881 static void 1882 sodump(struct sockaddr *sa, const char *which) 1883 { 1884 #ifdef INET6 1885 char nbuf[INET6_ADDRSTRLEN]; 1886 #endif 1887 1888 switch (sa->sa_family) { 1889 case AF_LINK: 1890 (void)printf("%s: link %s; ", which, 1891 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1892 break; 1893 #ifdef INET 1894 case AF_INET: 1895 (void)printf("%s: inet %s; ", which, 1896 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1897 break; 1898 #endif 1899 #ifdef INET6 1900 case AF_INET6: 1901 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1902 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1903 sizeof(nbuf))); 1904 break; 1905 #endif 1906 } 1907 (void)fflush(stdout); 1908 } 1909 1910 /* States*/ 1911 #define VIRGIN 0 1912 #define GOTONE 1 1913 #define GOTTWO 2 1914 /* Inputs */ 1915 #define DIGIT (4*0) 1916 #define END (4*1) 1917 #define DELIM (4*2) 1918 1919 static void 1920 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1921 { 1922 char *cp = (char *)sa; 1923 char *cplim = cp + size; 1924 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1925 1926 memset(cp, 0, size); 1927 cp++; 1928 do { 1929 if ((*addr >= '0') && (*addr <= '9')) { 1930 new = *addr - '0'; 1931 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1932 new = *addr - 'a' + 10; 1933 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1934 new = *addr - 'A' + 10; 1935 } else if (*addr == '\0') 1936 state |= END; 1937 else 1938 state |= DELIM; 1939 addr++; 1940 switch (state /* | INPUT */) { 1941 case GOTTWO | DIGIT: 1942 *cp++ = byte; /*FALLTHROUGH*/ 1943 case VIRGIN | DIGIT: 1944 state = GOTONE; byte = new; continue; 1945 case GOTONE | DIGIT: 1946 state = GOTTWO; byte = new + (byte << 4); continue; 1947 default: /* | DELIM */ 1948 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1949 case GOTONE | END: 1950 case GOTTWO | END: 1951 *cp++ = byte; /* FALLTHROUGH */ 1952 case VIRGIN | END: 1953 break; 1954 } 1955 break; 1956 } while (cp < cplim); 1957 sa->sa_len = cp - (char *)sa; 1958 } 1959