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 * 4. 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 #ifndef FSTACK 44 __FBSDID("$FreeBSD$"); 45 #endif 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 <stdbool.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <sysexits.h> 72 #include <time.h> 73 #include <unistd.h> 74 #include <ifaddrs.h> 75 76 #ifdef FSTACK 77 #include "compat.h" 78 #include "ff_ipc.h" 79 80 static int shutdown_rd; 81 static int sofib; 82 83 static int 84 fake_socket(int domain, int type, int protocol) 85 { 86 return 0; 87 } 88 89 static int 90 fake_shutdown(int fd, int how) 91 { 92 if (how == SHUT_RD) { 93 shutdown_rd = 1; 94 } 95 return 0; 96 } 97 98 static int 99 fake_setsockopt(int sockfd, int level, int optname, 100 const void *optval, socklen_t optlen) 101 { 102 return 0; 103 } 104 105 static int 106 rtioctl(char *data, unsigned len, unsigned read_len) 107 { 108 struct ff_msg *msg, *retmsg = NULL; 109 unsigned maxlen; 110 111 msg = ff_ipc_msg_alloc(); 112 if (msg == NULL) { 113 errno = ENOMEM; 114 return -1; 115 } 116 117 if (len > msg->buf_len) { 118 errno = EINVAL; 119 ff_ipc_msg_free(msg); 120 return -1; 121 } 122 123 if (read_len > msg->buf_len) { 124 read_len = msg->buf_len; 125 } 126 127 maxlen = read_len ? read_len : len; 128 129 msg->msg_type = FF_ROUTE; 130 msg->route.fib = sofib; 131 msg->route.len = len; 132 msg->route.maxlen = maxlen; 133 msg->route.data = msg->buf_addr; 134 memcpy(msg->route.data, data, len); 135 msg->buf_addr += len; 136 137 int ret = ff_ipc_send(msg); 138 if (ret < 0) { 139 errno = EPIPE; 140 ff_ipc_msg_free(msg); 141 return -1; 142 } 143 144 do { 145 if (retmsg != NULL) { 146 ff_ipc_msg_free(retmsg); 147 } 148 ret = ff_ipc_recv(&retmsg); 149 if (ret < 0) { 150 errno = EPIPE; 151 ff_ipc_msg_free(msg); 152 return -1; 153 } 154 } while (msg != retmsg); 155 156 if (retmsg->result == 0) { 157 ret = retmsg->route.len; 158 159 if (!shutdown_rd && read_len > 0) { 160 memcpy(data, retmsg->route.data, retmsg->route.len); 161 } 162 } else { 163 ret = -1; 164 errno = retmsg->result; 165 } 166 167 ff_ipc_msg_free(msg); 168 169 return ret; 170 } 171 172 #define socket(a, b, c) fake_socket((a), (b), (c)) 173 #define shutdown(a, b) fake_shutdown((a), (b)) 174 #define setsockopt(a, b, c, d, e) fake_setsockopt((a), (b), (c), (d), (e)) 175 176 #define write(a, b, c) rtioctl((b), (c), (0)) 177 178 #define CLOCK_REALTIME_FAST CLOCK_REALTIME 179 180 #endif 181 182 struct fibl { 183 TAILQ_ENTRY(fibl) fl_next; 184 185 int fl_num; 186 int fl_error; 187 int fl_errno; 188 }; 189 190 static struct keytab { 191 const char *kt_cp; 192 int kt_i; 193 } const keywords[] = { 194 #include "keywords.h" 195 {0, 0} 196 }; 197 198 static struct sockaddr_storage so[RTAX_MAX]; 199 static int pid, rtm_addrs; 200 static int s; 201 #ifndef FSTACK 202 static int nflag, af, qflag, tflag; 203 #else 204 static int nflag = 1; 205 static int af, qflag, tflag; 206 #endif 207 static int verbose, aflen; 208 static int locking, lockrest, debugonly; 209 static struct rt_metrics rt_metrics; 210 static u_long rtm_inits; 211 static uid_t uid; 212 static int defaultfib; 213 static int numfibs; 214 static char domain[MAXHOSTNAMELEN + 1]; 215 static bool domain_initialized; 216 static int rtm_seq; 217 static char rt_line[NI_MAXHOST]; 218 static char net_line[MAXHOSTNAMELEN + 1]; 219 220 static struct { 221 struct rt_msghdr m_rtm; 222 char m_space[512]; 223 } m_rtmsg; 224 225 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 226 227 static void printb(int, const char *); 228 static void flushroutes(int argc, char *argv[]); 229 static int flushroutes_fib(int); 230 static int getaddr(int, char *, struct hostent **, int); 231 static int keyword(const char *); 232 #ifdef INET 233 static void inet_makenetandmask(u_long, struct sockaddr_in *, 234 struct sockaddr_in *, u_long); 235 #endif 236 #ifdef INET6 237 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 238 #endif 239 #ifndef FSTACK 240 static void interfaces(void); 241 static void monitor(int, char*[]); 242 #endif 243 static const char *netname(struct sockaddr *); 244 static void newroute(int, char **); 245 static int newroute_fib(int, char *, int); 246 static void pmsg_addrs(char *, int, size_t); 247 static void pmsg_common(struct rt_msghdr *, size_t); 248 static int prefixlen(const char *); 249 static void print_getmsg(struct rt_msghdr *, int, int); 250 static void print_rtmsg(struct rt_msghdr *, size_t); 251 static const char *routename(struct sockaddr *); 252 static int rtmsg(int, int, int); 253 static void set_metric(char *, int); 254 static int set_sofib(int); 255 static void sockaddr(char *, struct sockaddr *, size_t); 256 static void sodump(struct sockaddr *, const char *); 257 static int fiboptlist_csv(const char *, struct fibl_head_t *); 258 static int fiboptlist_range(const char *, struct fibl_head_t *); 259 260 static void usage(const char *) __dead2; 261 262 static void 263 usage(const char *cp) 264 { 265 if (cp != NULL) 266 warnx("bad keyword: %s", cp); 267 #ifndef FSTACK 268 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 269 #else 270 errx(EX_USAGE, "usage: route -p <f-stack proc_id> [-46dnqtv] command [[modifiers] args]"); 271 #endif 272 /* NOTREACHED */ 273 } 274 275 int 276 main(int argc, char **argv) 277 { 278 int ch; 279 size_t len; 280 281 if (argc < 2) 282 usage(NULL); 283 284 ff_ipc_init(); 285 286 #ifndef FSTACK 287 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 288 #else 289 while ((ch = getopt(argc, argv, "46nqdtvp:")) != -1) 290 #endif 291 switch(ch) { 292 case '4': 293 #ifdef INET 294 af = AF_INET; 295 aflen = sizeof(struct sockaddr_in); 296 #else 297 errx(1, "IPv4 support is not compiled in"); 298 #endif 299 break; 300 case '6': 301 #ifdef INET6 302 af = AF_INET6; 303 aflen = sizeof(struct sockaddr_in6); 304 #else 305 errx(1, "IPv6 support is not compiled in"); 306 #endif 307 break; 308 case 'n': 309 nflag = 1; 310 break; 311 case 'q': 312 qflag = 1; 313 break; 314 case 'v': 315 verbose = 1; 316 break; 317 case 't': 318 tflag = 1; 319 break; 320 case 'd': 321 debugonly = 1; 322 break; 323 #ifdef FSTACK 324 case 'p': 325 ff_set_proc_id(atoi(optarg)); 326 break; 327 #endif 328 case '?': 329 default: 330 usage(NULL); 331 } 332 argc -= optind; 333 argv += optind; 334 335 pid = getpid(); 336 uid = geteuid(); 337 if (tflag) 338 s = open(_PATH_DEVNULL, O_WRONLY, 0); 339 else 340 s = socket(PF_ROUTE, SOCK_RAW, 0); 341 if (s < 0) 342 err(EX_OSERR, "socket"); 343 344 len = sizeof(numfibs); 345 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 346 numfibs = -1; 347 348 len = sizeof(defaultfib); 349 if (numfibs != -1 && 350 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 351 0) == -1) 352 defaultfib = -1; 353 354 if (*argv != NULL) 355 switch (keyword(*argv)) { 356 case K_GET: 357 case K_SHOW: 358 uid = 0; 359 /* FALLTHROUGH */ 360 361 case K_CHANGE: 362 case K_ADD: 363 case K_DEL: 364 case K_DELETE: 365 newroute(argc, argv); 366 /* NOTREACHED */ 367 368 case K_MONITOR: 369 #ifndef FSTACK 370 monitor(argc, argv); 371 #else 372 usage(*argv); 373 #endif 374 /* NOTREACHED */ 375 376 case K_FLUSH: 377 flushroutes(argc, argv); 378 exit(0); 379 /* NOTREACHED */ 380 } 381 usage(*argv); 382 /* NOTREACHED */ 383 } 384 385 static int 386 set_sofib(int fib) 387 { 388 389 if (fib < 0) 390 return (0); 391 #ifdef FSTACK 392 sofib = fib; 393 #endif 394 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 395 sizeof(fib))); 396 } 397 398 static int 399 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 400 { 401 struct fibl *fl; 402 char *str0, *str, *token, *endptr; 403 int fib[2], i, error; 404 405 str0 = str = strdup(arg); 406 error = 0; 407 i = 0; 408 while ((token = strsep(&str, "-")) != NULL) { 409 switch (i) { 410 case 0: 411 case 1: 412 errno = 0; 413 fib[i] = strtol(token, &endptr, 0); 414 if (errno == 0) { 415 if (*endptr != '\0' || 416 fib[i] < 0 || 417 (numfibs != -1 && fib[i] > numfibs - 1)) 418 errno = EINVAL; 419 } 420 if (errno) 421 error = 1; 422 break; 423 default: 424 error = 1; 425 } 426 if (error) 427 goto fiboptlist_range_ret; 428 i++; 429 } 430 if (fib[0] >= fib[1]) { 431 error = 1; 432 goto fiboptlist_range_ret; 433 } 434 for (i = fib[0]; i <= fib[1]; i++) { 435 fl = calloc(1, sizeof(*fl)); 436 if (fl == NULL) { 437 error = 1; 438 goto fiboptlist_range_ret; 439 } 440 fl->fl_num = i; 441 TAILQ_INSERT_TAIL(flh, fl, fl_next); 442 } 443 fiboptlist_range_ret: 444 free(str0); 445 return (error); 446 } 447 448 #define ALLSTRLEN 64 449 static int 450 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 451 { 452 struct fibl *fl; 453 char *str0, *str, *token, *endptr; 454 int fib, error; 455 456 str0 = str = NULL; 457 if (strcmp("all", arg) == 0) { 458 str = calloc(1, ALLSTRLEN); 459 if (str == NULL) { 460 error = 1; 461 goto fiboptlist_csv_ret; 462 } 463 if (numfibs > 1) 464 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 465 else 466 snprintf(str, ALLSTRLEN - 1, "%d", 0); 467 } else if (strcmp("default", arg) == 0) { 468 str0 = str = calloc(1, ALLSTRLEN); 469 if (str == NULL) { 470 error = 1; 471 goto fiboptlist_csv_ret; 472 } 473 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 474 } else 475 str0 = str = strdup(arg); 476 477 error = 0; 478 while ((token = strsep(&str, ",")) != NULL) { 479 if (*token != '-' && strchr(token, '-') != NULL) { 480 error = fiboptlist_range(token, flh); 481 if (error) 482 goto fiboptlist_csv_ret; 483 } else { 484 errno = 0; 485 fib = strtol(token, &endptr, 0); 486 if (errno == 0) { 487 if (*endptr != '\0' || 488 fib < 0 || 489 (numfibs != -1 && fib > numfibs - 1)) 490 errno = EINVAL; 491 } 492 if (errno) { 493 error = 1; 494 goto fiboptlist_csv_ret; 495 } 496 fl = calloc(1, sizeof(*fl)); 497 if (fl == NULL) { 498 error = 1; 499 goto fiboptlist_csv_ret; 500 } 501 fl->fl_num = fib; 502 TAILQ_INSERT_TAIL(flh, fl, fl_next); 503 } 504 } 505 fiboptlist_csv_ret: 506 if (str0 != NULL) 507 free(str0); 508 return (error); 509 } 510 511 /* 512 * Purge all entries in the routing tables not 513 * associated with network interfaces. 514 */ 515 static void 516 flushroutes(int argc, char *argv[]) 517 { 518 struct fibl *fl; 519 int error; 520 521 if (uid != 0 && !debugonly && !tflag) 522 errx(EX_NOPERM, "must be root to alter routing table"); 523 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 524 525 TAILQ_INIT(&fibl_head); 526 while (argc > 1) { 527 argc--; 528 argv++; 529 if (**argv != '-') 530 usage(*argv); 531 switch (keyword(*argv + 1)) { 532 #ifdef INET 533 case K_4: 534 case K_INET: 535 af = AF_INET; 536 break; 537 #endif 538 #ifdef INET6 539 case K_6: 540 case K_INET6: 541 af = AF_INET6; 542 break; 543 #endif 544 case K_LINK: 545 af = AF_LINK; 546 break; 547 case K_FIB: 548 if (!--argc) 549 usage(*argv); 550 error = fiboptlist_csv(*++argv, &fibl_head); 551 if (error) 552 errx(EX_USAGE, "invalid fib number: %s", *argv); 553 break; 554 default: 555 usage(*argv); 556 } 557 } 558 if (TAILQ_EMPTY(&fibl_head)) { 559 error = fiboptlist_csv("default", &fibl_head); 560 if (error) 561 errx(EX_OSERR, "fiboptlist_csv failed."); 562 } 563 TAILQ_FOREACH(fl, &fibl_head, fl_next) 564 flushroutes_fib(fl->fl_num); 565 } 566 567 static int 568 flushroutes_fib(int fib) 569 { 570 struct rt_msghdr *rtm; 571 size_t needed; 572 char *buf, *next, *lim; 573 int mib[7], rlen, seqno, count = 0; 574 int error; 575 576 error = set_sofib(fib); 577 if (error) { 578 warn("fib number %d is ignored", fib); 579 return (error); 580 } 581 582 retry: 583 mib[0] = CTL_NET; 584 mib[1] = PF_ROUTE; 585 mib[2] = 0; /* protocol */ 586 mib[3] = AF_UNSPEC; 587 mib[4] = NET_RT_DUMP; 588 mib[5] = 0; /* no flags */ 589 mib[6] = fib; 590 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 591 err(EX_OSERR, "route-sysctl-estimate"); 592 if ((buf = malloc(needed)) == NULL) 593 errx(EX_OSERR, "malloc failed"); 594 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 595 if (errno == ENOMEM && count++ < 10) { 596 warnx("Routing table grew, retrying"); 597 sleep(1); 598 free(buf); 599 goto retry; 600 } 601 err(EX_OSERR, "route-sysctl-get"); 602 } 603 lim = buf + needed; 604 if (verbose) 605 (void)printf("Examining routing table from sysctl\n"); 606 seqno = 0; /* ??? */ 607 for (next = buf; next < lim; next += rtm->rtm_msglen) { 608 rtm = (struct rt_msghdr *)(void *)next; 609 if (verbose) 610 print_rtmsg(rtm, rtm->rtm_msglen); 611 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 612 continue; 613 if (af != 0) { 614 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 615 616 if (sa->sa_family != af) 617 continue; 618 } 619 if (debugonly) 620 continue; 621 rtm->rtm_type = RTM_DELETE; 622 rtm->rtm_seq = seqno; 623 rlen = write(s, next, rtm->rtm_msglen); 624 if (rlen < 0 && errno == EPERM) 625 err(1, "write to routing socket"); 626 if (rlen < (int)rtm->rtm_msglen) { 627 warn("write to routing socket"); 628 (void)printf("got only %d for rlen\n", rlen); 629 free(buf); 630 goto retry; 631 break; 632 } 633 seqno++; 634 if (qflag) 635 continue; 636 if (verbose) 637 print_rtmsg(rtm, rlen); 638 else { 639 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 640 641 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 642 routename(sa) : netname(sa)); 643 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 644 printf("%-20.20s ", routename(sa)); 645 if (fib >= 0) 646 printf("-fib %-3d ", fib); 647 printf("done\n"); 648 } 649 } 650 return (error); 651 } 652 653 static const char * 654 routename(struct sockaddr *sa) 655 { 656 struct sockaddr_dl *sdl; 657 const char *cp; 658 int n; 659 660 if (!domain_initialized) { 661 domain_initialized = true; 662 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 663 (cp = strchr(domain, '.'))) { 664 domain[MAXHOSTNAMELEN] = '\0'; 665 (void)strcpy(domain, cp + 1); 666 } else 667 domain[0] = '\0'; 668 } 669 670 /* If the address is zero-filled, use "default". */ 671 if (sa->sa_len == 0 && nflag == 0) 672 return ("default"); 673 #if defined(INET) || defined(INET6) 674 switch (sa->sa_family) { 675 #ifdef INET 676 case AF_INET: 677 /* If the address is zero-filled, use "default". */ 678 if (nflag == 0 && 679 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 680 INADDR_ANY) 681 return("default"); 682 break; 683 #endif 684 #ifdef INET6 685 case AF_INET6: 686 /* If the address is zero-filled, use "default". */ 687 if (nflag == 0 && 688 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 689 return("default"); 690 break; 691 #endif 692 } 693 #endif 694 695 switch (sa->sa_family) { 696 #if defined(INET) || defined(INET6) 697 #ifdef INET 698 case AF_INET: 699 #endif 700 #ifdef INET6 701 case AF_INET6: 702 #endif 703 { 704 struct sockaddr_storage ss; 705 int error; 706 char *p; 707 708 memset(&ss, 0, sizeof(ss)); 709 if (sa->sa_len == 0) 710 ss.ss_family = sa->sa_family; 711 else 712 memcpy(&ss, sa, sa->sa_len); 713 /* Expand sa->sa_len because it could be shortened. */ 714 if (sa->sa_family == AF_INET) 715 ss.ss_len = sizeof(struct sockaddr_in); 716 else if (sa->sa_family == AF_INET6) 717 ss.ss_len = sizeof(struct sockaddr_in6); 718 #ifndef FSTACK 719 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 720 rt_line, sizeof(rt_line), NULL, 0, 721 (nflag == 0) ? 0 : NI_NUMERICHOST); 722 #else 723 error = 0; 724 struct sockaddr_in *sin = (struct sockaddr_in *)&ss; 725 const char *dst = inet_ntop(AF_INET, &sin->sin_addr, rt_line, sizeof(rt_line)); 726 if (dst == NULL) { 727 error = EAI_NONAME; 728 } 729 #endif 730 if (error) { 731 warnx("getnameinfo(): %s", gai_strerror(error)); 732 strncpy(rt_line, "invalid", sizeof(rt_line)); 733 } 734 735 /* Remove the domain part if any. */ 736 p = strchr(rt_line, '.'); 737 if (p != NULL && strcmp(p + 1, domain) == 0) 738 *p = '\0'; 739 740 return (rt_line); 741 break; 742 } 743 #endif 744 case AF_LINK: 745 sdl = (struct sockaddr_dl *)(void *)sa; 746 747 if (sdl->sdl_nlen == 0 && 748 sdl->sdl_alen == 0 && 749 sdl->sdl_slen == 0) { 750 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 751 sdl->sdl_index); 752 if (n > (int)sizeof(rt_line)) 753 rt_line[0] = '\0'; 754 return (rt_line); 755 } else 756 return (link_ntoa(sdl)); 757 break; 758 759 default: 760 { 761 u_short *sp = (u_short *)(void *)sa; 762 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 763 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 764 char *cpe = rt_line + sizeof(rt_line); 765 766 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 767 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 768 cps += n; 769 else 770 *cps = '\0'; 771 break; 772 } 773 } 774 return (rt_line); 775 } 776 777 /* 778 * Return the name of the network whose address is given. 779 * The address is assumed to be that of a net, not a host. 780 */ 781 static const char * 782 netname(struct sockaddr *sa) 783 { 784 struct sockaddr_dl *sdl; 785 int n; 786 #ifdef INET 787 #ifndef FSTACK 788 struct netent *np = NULL; 789 const char *cp = NULL; 790 u_long i; 791 #else 792 const char *cp = NULL; 793 #endif 794 #endif 795 796 switch (sa->sa_family) { 797 #ifdef INET 798 case AF_INET: 799 { 800 struct in_addr in; 801 802 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 803 #ifndef FSTACK 804 i = in.s_addr = ntohl(in.s_addr); 805 #else 806 in.s_addr = ntohl(in.s_addr); 807 #endif 808 if (in.s_addr == 0) 809 cp = "default"; 810 #ifndef FSTACK 811 else if (!nflag) { 812 np = getnetbyaddr(i, AF_INET); 813 if (np != NULL) 814 cp = np->n_name; 815 } 816 #endif 817 #define C(x) (unsigned)((x) & 0xff) 818 if (cp != NULL) 819 strncpy(net_line, cp, sizeof(net_line)); 820 else if ((in.s_addr & 0xffffff) == 0) 821 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 822 else if ((in.s_addr & 0xffff) == 0) 823 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 824 C(in.s_addr >> 16)); 825 else if ((in.s_addr & 0xff) == 0) 826 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 827 C(in.s_addr >> 16), C(in.s_addr >> 8)); 828 else 829 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 830 C(in.s_addr >> 16), C(in.s_addr >> 8), 831 C(in.s_addr)); 832 #undef C 833 break; 834 } 835 #endif 836 #ifdef INET6 837 case AF_INET6: 838 { 839 struct sockaddr_in6 sin6; 840 int niflags = 0; 841 842 memset(&sin6, 0, sizeof(sin6)); 843 memcpy(&sin6, sa, sa->sa_len); 844 sin6.sin6_len = sizeof(sin6); 845 sin6.sin6_family = AF_INET6; 846 if (nflag) 847 niflags |= NI_NUMERICHOST; 848 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 849 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 850 strncpy(net_line, "invalid", sizeof(net_line)); 851 852 return(net_line); 853 } 854 #endif 855 case AF_LINK: 856 sdl = (struct sockaddr_dl *)(void *)sa; 857 858 if (sdl->sdl_nlen == 0 && 859 sdl->sdl_alen == 0 && 860 sdl->sdl_slen == 0) { 861 n = snprintf(net_line, sizeof(net_line), "link#%d", 862 sdl->sdl_index); 863 if (n > (int)sizeof(net_line)) 864 net_line[0] = '\0'; 865 return (net_line); 866 } else 867 return (link_ntoa(sdl)); 868 break; 869 870 default: 871 { 872 u_short *sp = (u_short *)(void *)sa->sa_data; 873 u_short *splim = sp + ((sa->sa_len + 1)>>1); 874 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 875 char *cpe = net_line + sizeof(net_line); 876 877 while (sp < splim && cps < cpe) 878 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 879 cps += n; 880 else 881 *cps = '\0'; 882 break; 883 } 884 } 885 return (net_line); 886 } 887 888 static void 889 set_metric(char *value, int key) 890 { 891 int flag = 0; 892 char *endptr; 893 u_long noval, *valp = &noval; 894 895 switch (key) { 896 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 897 caseof(K_MTU, RTV_MTU, rmx_mtu); 898 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 899 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 900 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 901 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 902 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 903 caseof(K_RTT, RTV_RTT, rmx_rtt); 904 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 905 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 906 } 907 rtm_inits |= flag; 908 if (lockrest || locking) 909 rt_metrics.rmx_locks |= flag; 910 if (locking) 911 locking = 0; 912 errno = 0; 913 *valp = strtol(value, &endptr, 0); 914 if (errno == 0 && *endptr != '\0') 915 errno = EINVAL; 916 if (errno) 917 err(EX_USAGE, "%s", value); 918 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 919 struct timespec ts; 920 921 clock_gettime(CLOCK_REALTIME_FAST, &ts); 922 *valp += ts.tv_sec; 923 } 924 } 925 926 #define F_ISHOST 0x01 927 #define F_FORCENET 0x02 928 #define F_FORCEHOST 0x04 929 #define F_PROXY 0x08 930 #define F_INTERFACE 0x10 931 932 static void 933 newroute(int argc, char **argv) 934 { 935 struct hostent *hp; 936 struct fibl *fl; 937 char *cmd; 938 const char *dest, *gateway, *errmsg; 939 int key, error, flags, nrflags, fibnum; 940 941 if (uid != 0 && !debugonly && !tflag) 942 errx(EX_NOPERM, "must be root to alter routing table"); 943 dest = NULL; 944 gateway = NULL; 945 flags = RTF_STATIC; 946 nrflags = 0; 947 hp = NULL; 948 TAILQ_INIT(&fibl_head); 949 950 cmd = argv[0]; 951 if (*cmd != 'g' && *cmd != 's') 952 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 953 while (--argc > 0) { 954 if (**(++argv)== '-') { 955 switch (key = keyword(1 + *argv)) { 956 case K_LINK: 957 af = AF_LINK; 958 aflen = sizeof(struct sockaddr_dl); 959 break; 960 #ifdef INET 961 case K_4: 962 case K_INET: 963 af = AF_INET; 964 aflen = sizeof(struct sockaddr_in); 965 break; 966 #endif 967 #ifdef INET6 968 case K_6: 969 case K_INET6: 970 af = AF_INET6; 971 aflen = sizeof(struct sockaddr_in6); 972 break; 973 #endif 974 case K_SA: 975 af = PF_ROUTE; 976 aflen = sizeof(struct sockaddr_storage); 977 break; 978 case K_IFACE: 979 case K_INTERFACE: 980 nrflags |= F_INTERFACE; 981 break; 982 case K_NOSTATIC: 983 flags &= ~RTF_STATIC; 984 break; 985 case K_LOCK: 986 locking = 1; 987 break; 988 case K_LOCKREST: 989 lockrest = 1; 990 break; 991 case K_HOST: 992 nrflags |= F_FORCEHOST; 993 break; 994 case K_REJECT: 995 flags |= RTF_REJECT; 996 break; 997 case K_BLACKHOLE: 998 flags |= RTF_BLACKHOLE; 999 break; 1000 case K_PROTO1: 1001 flags |= RTF_PROTO1; 1002 break; 1003 case K_PROTO2: 1004 flags |= RTF_PROTO2; 1005 break; 1006 case K_PROXY: 1007 nrflags |= F_PROXY; 1008 break; 1009 case K_XRESOLVE: 1010 flags |= RTF_XRESOLVE; 1011 break; 1012 case K_STATIC: 1013 flags |= RTF_STATIC; 1014 break; 1015 case K_STICKY: 1016 flags |= RTF_STICKY; 1017 break; 1018 case K_NOSTICK: 1019 flags &= ~RTF_STICKY; 1020 break; 1021 case K_FIB: 1022 if (!--argc) 1023 usage(NULL); 1024 error = fiboptlist_csv(*++argv, &fibl_head); 1025 if (error) 1026 errx(EX_USAGE, 1027 "invalid fib number: %s", *argv); 1028 break; 1029 case K_IFA: 1030 if (!--argc) 1031 usage(NULL); 1032 getaddr(RTAX_IFA, *++argv, 0, nrflags); 1033 break; 1034 case K_IFP: 1035 if (!--argc) 1036 usage(NULL); 1037 getaddr(RTAX_IFP, *++argv, 0, nrflags); 1038 break; 1039 case K_GENMASK: 1040 if (!--argc) 1041 usage(NULL); 1042 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 1043 break; 1044 case K_GATEWAY: 1045 if (!--argc) 1046 usage(NULL); 1047 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 1048 gateway = *argv; 1049 break; 1050 case K_DST: 1051 if (!--argc) 1052 usage(NULL); 1053 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 1054 nrflags |= F_ISHOST; 1055 dest = *argv; 1056 break; 1057 case K_NETMASK: 1058 if (!--argc) 1059 usage(NULL); 1060 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 1061 /* FALLTHROUGH */ 1062 case K_NET: 1063 nrflags |= F_FORCENET; 1064 break; 1065 case K_PREFIXLEN: 1066 if (!--argc) 1067 usage(NULL); 1068 if (prefixlen(*++argv) == -1) { 1069 nrflags &= ~F_FORCENET; 1070 nrflags |= F_ISHOST; 1071 } else { 1072 nrflags |= F_FORCENET; 1073 nrflags &= ~F_ISHOST; 1074 } 1075 break; 1076 case K_MTU: 1077 case K_HOPCOUNT: 1078 case K_EXPIRE: 1079 case K_RECVPIPE: 1080 case K_SENDPIPE: 1081 case K_SSTHRESH: 1082 case K_RTT: 1083 case K_RTTVAR: 1084 case K_WEIGHT: 1085 if (!--argc) 1086 usage(NULL); 1087 set_metric(*++argv, key); 1088 break; 1089 default: 1090 usage(1+*argv); 1091 } 1092 } else { 1093 if ((rtm_addrs & RTA_DST) == 0) { 1094 dest = *argv; 1095 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 1096 nrflags |= F_ISHOST; 1097 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 1098 gateway = *argv; 1099 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 1100 } else { 1101 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 1102 nrflags |= F_FORCENET; 1103 } 1104 } 1105 } 1106 1107 /* Do some sanity checks on resulting request */ 1108 if (so[RTAX_DST].ss_len == 0) { 1109 warnx("destination parameter required"); 1110 usage(NULL); 1111 } 1112 1113 if (so[RTAX_NETMASK].ss_len != 0 && 1114 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 1115 warnx("destination and netmask family need to be the same"); 1116 usage(NULL); 1117 } 1118 1119 if (nrflags & F_FORCEHOST) { 1120 nrflags |= F_ISHOST; 1121 #ifdef INET6 1122 if (af == AF_INET6) { 1123 rtm_addrs &= ~RTA_NETMASK; 1124 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 1125 } 1126 #endif 1127 } 1128 if (nrflags & F_FORCENET) 1129 nrflags &= ~F_ISHOST; 1130 flags |= RTF_UP; 1131 if (nrflags & F_ISHOST) 1132 flags |= RTF_HOST; 1133 if ((nrflags & F_INTERFACE) == 0) 1134 flags |= RTF_GATEWAY; 1135 if (nrflags & F_PROXY) 1136 flags |= RTF_ANNOUNCE; 1137 if (dest == NULL) 1138 dest = ""; 1139 if (gateway == NULL) 1140 gateway = ""; 1141 1142 if (TAILQ_EMPTY(&fibl_head)) { 1143 error = fiboptlist_csv("default", &fibl_head); 1144 if (error) 1145 errx(EX_OSERR, "fiboptlist_csv failed."); 1146 } 1147 error = 0; 1148 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1149 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1150 if (fl->fl_error) 1151 fl->fl_errno = errno; 1152 error += fl->fl_error; 1153 } 1154 if (*cmd == 'g' || *cmd == 's') 1155 exit(error); 1156 1157 error = 0; 1158 if (!qflag) { 1159 fibnum = 0; 1160 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1161 if (fl->fl_error == 0) 1162 fibnum++; 1163 } 1164 if (fibnum > 0) { 1165 int firstfib = 1; 1166 1167 printf("%s %s %s", cmd, 1168 (nrflags & F_ISHOST) ? "host" : "net", dest); 1169 if (*gateway) 1170 printf(": gateway %s", gateway); 1171 1172 if (numfibs > 1) { 1173 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1174 if (fl->fl_error == 0 1175 && fl->fl_num >= 0) { 1176 if (firstfib) { 1177 printf(" fib "); 1178 firstfib = 0; 1179 } 1180 printf("%d", fl->fl_num); 1181 if (fibnum-- > 1) 1182 printf(","); 1183 } 1184 } 1185 } 1186 printf("\n"); 1187 } 1188 1189 fibnum = 0; 1190 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1191 if (fl->fl_error != 0) { 1192 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1193 ? "host" : "net", dest); 1194 if (*gateway) 1195 printf(": gateway %s", gateway); 1196 1197 if (fl->fl_num >= 0) 1198 printf(" fib %d", fl->fl_num); 1199 1200 switch (fl->fl_errno) { 1201 case ESRCH: 1202 errmsg = "not in table"; 1203 break; 1204 case EBUSY: 1205 errmsg = "entry in use"; 1206 break; 1207 case ENOBUFS: 1208 errmsg = "not enough memory"; 1209 break; 1210 case EADDRINUSE: 1211 /* 1212 * handle recursion avoidance 1213 * in rt_setgate() 1214 */ 1215 errmsg = "gateway uses the same route"; 1216 break; 1217 case EEXIST: 1218 errmsg = "route already in table"; 1219 break; 1220 default: 1221 errmsg = strerror(fl->fl_errno); 1222 break; 1223 } 1224 printf(": %s\n", errmsg); 1225 error = 1; 1226 } 1227 } 1228 } 1229 exit(error); 1230 } 1231 1232 static int 1233 newroute_fib(int fib, char *cmd, int flags) 1234 { 1235 int error; 1236 1237 error = set_sofib(fib); 1238 if (error) { 1239 warn("fib number %d is ignored", fib); 1240 return (error); 1241 } 1242 1243 error = rtmsg(*cmd, flags, fib); 1244 return (error); 1245 } 1246 1247 #ifdef INET 1248 static void 1249 inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1250 struct sockaddr_in *sin_mask, u_long bits) 1251 { 1252 u_long mask = 0; 1253 1254 rtm_addrs |= RTA_NETMASK; 1255 1256 /* 1257 * MSB of net should be meaningful. 0/0 is exception. 1258 */ 1259 if (net > 0) 1260 while ((net & 0xff000000) == 0) 1261 net <<= 8; 1262 1263 /* 1264 * If no /xx was specified we must calculate the 1265 * CIDR address. 1266 */ 1267 if ((bits == 0) && (net != 0)) { 1268 u_long i, j; 1269 1270 for(i = 0, j = 0xff; i < 4; i++) { 1271 if (net & j) { 1272 break; 1273 } 1274 j <<= 8; 1275 } 1276 /* i holds the first non zero bit */ 1277 bits = 32 - (i*8); 1278 } 1279 if (bits != 0) 1280 mask = 0xffffffff << (32 - bits); 1281 1282 sin->sin_addr.s_addr = htonl(net); 1283 sin_mask->sin_addr.s_addr = htonl(mask); 1284 sin_mask->sin_len = sizeof(struct sockaddr_in); 1285 sin_mask->sin_family = AF_INET; 1286 } 1287 #endif 1288 1289 #ifdef INET6 1290 /* 1291 * XXX the function may need more improvement... 1292 */ 1293 static int 1294 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1295 { 1296 1297 if (plen == NULL) { 1298 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1299 sin6->sin6_scope_id == 0) 1300 plen = "0"; 1301 } 1302 1303 if (plen == NULL || strcmp(plen, "128") == 0) 1304 return (1); 1305 rtm_addrs |= RTA_NETMASK; 1306 prefixlen(plen); 1307 return (0); 1308 } 1309 #endif 1310 1311 /* 1312 * Interpret an argument as a network address of some kind, 1313 * returning 1 if a host address, 0 if a network address. 1314 */ 1315 static int 1316 getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1317 { 1318 struct sockaddr *sa; 1319 #if defined(INET) 1320 struct sockaddr_in *sin; 1321 struct hostent *hp; 1322 #ifndef FSTACK 1323 struct netent *np; 1324 #endif 1325 u_long val; 1326 char *q; 1327 #elif defined(INET6) 1328 char *q; 1329 #endif 1330 1331 if (idx < 0 || idx >= RTAX_MAX) 1332 usage("internal error"); 1333 if (af == 0) { 1334 #if defined(INET) 1335 af = AF_INET; 1336 aflen = sizeof(struct sockaddr_in); 1337 #elif defined(INET6) 1338 af = AF_INET6; 1339 aflen = sizeof(struct sockaddr_in6); 1340 #else 1341 af = AF_LINK; 1342 aflen = sizeof(struct sockaddr_dl); 1343 #endif 1344 } 1345 #ifndef INET 1346 hpp = NULL; 1347 #endif 1348 rtm_addrs |= (1 << idx); 1349 sa = (struct sockaddr *)&so[idx]; 1350 sa->sa_family = af; 1351 sa->sa_len = aflen; 1352 1353 switch (idx) { 1354 case RTAX_GATEWAY: 1355 if (nrflags & F_INTERFACE) { 1356 struct ifaddrs *ifap, *ifa; 1357 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1358 struct sockaddr_dl *sdl = NULL; 1359 1360 if (getifaddrs(&ifap)) 1361 err(EX_OSERR, "getifaddrs"); 1362 1363 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1364 if (ifa->ifa_addr->sa_family != AF_LINK) 1365 continue; 1366 1367 if (strcmp(str, ifa->ifa_name) != 0) 1368 continue; 1369 1370 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1371 } 1372 /* If we found it, then use it */ 1373 if (sdl != NULL) { 1374 /* 1375 * Note that we need to copy before calling 1376 * freeifaddrs(). 1377 */ 1378 memcpy(sdl0, sdl, sdl->sdl_len); 1379 } 1380 freeifaddrs(ifap); 1381 if (sdl != NULL) 1382 return(1); 1383 else 1384 errx(EX_DATAERR, 1385 "interface '%s' does not exist", str); 1386 } 1387 break; 1388 case RTAX_IFP: 1389 sa->sa_family = AF_LINK; 1390 break; 1391 } 1392 if (strcmp(str, "default") == 0) { 1393 /* 1394 * Default is net 0.0.0.0/0 1395 */ 1396 switch (idx) { 1397 case RTAX_DST: 1398 nrflags |= F_FORCENET; 1399 getaddr(RTAX_NETMASK, str, 0, nrflags); 1400 break; 1401 } 1402 return (0); 1403 } 1404 switch (sa->sa_family) { 1405 #ifdef INET6 1406 case AF_INET6: 1407 { 1408 struct addrinfo hints, *res; 1409 int ecode; 1410 1411 q = NULL; 1412 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1413 *q = '\0'; 1414 memset(&hints, 0, sizeof(hints)); 1415 hints.ai_family = sa->sa_family; 1416 hints.ai_socktype = SOCK_DGRAM; 1417 ecode = getaddrinfo(str, NULL, &hints, &res); 1418 if (ecode != 0 || res->ai_family != AF_INET6 || 1419 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1420 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1421 memcpy(sa, res->ai_addr, res->ai_addrlen); 1422 freeaddrinfo(res); 1423 if (q != NULL) 1424 *q++ = '/'; 1425 if (idx == RTAX_DST) 1426 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1427 return (0); 1428 } 1429 #endif /* INET6 */ 1430 case AF_LINK: 1431 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1432 return (1); 1433 1434 case PF_ROUTE: 1435 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1436 return (1); 1437 #ifdef INET 1438 case AF_INET: 1439 #endif 1440 default: 1441 break; 1442 } 1443 1444 #ifdef INET 1445 sin = (struct sockaddr_in *)(void *)sa; 1446 if (hpp == NULL) 1447 hpp = &hp; 1448 *hpp = NULL; 1449 1450 q = strchr(str,'/'); 1451 if (q != NULL && idx == RTAX_DST) { 1452 *q = '\0'; 1453 if ((val = inet_network(str)) != INADDR_NONE) { 1454 inet_makenetandmask(val, sin, 1455 (struct sockaddr_in *)&so[RTAX_NETMASK], 1456 strtoul(q+1, 0, 0)); 1457 return (0); 1458 } 1459 *q = '/'; 1460 } 1461 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1462 inet_aton(str, &sin->sin_addr)) { 1463 val = sin->sin_addr.s_addr; 1464 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1465 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1466 return (1); 1467 else { 1468 val = ntohl(val); 1469 goto netdone; 1470 } 1471 } 1472 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1473 ((val = inet_network(str)) != INADDR_NONE 1474 #ifndef FSTACK 1475 || ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0) 1476 #endif 1477 )){ 1478 1479 netdone: 1480 inet_makenetandmask(val, sin, 1481 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1482 return (0); 1483 } 1484 1485 #ifndef FSTACK 1486 hp = gethostbyname(str); 1487 if (hp != NULL) { 1488 *hpp = hp; 1489 sin->sin_family = hp->h_addrtype; 1490 memmove((char *)&sin->sin_addr, hp->h_addr, 1491 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1492 return (1); 1493 } 1494 #endif 1495 #endif 1496 errx(EX_NOHOST, "bad address: %s", str); 1497 } 1498 1499 static int 1500 prefixlen(const char *str) 1501 { 1502 int len = atoi(str), q, r; 1503 int max; 1504 char *p; 1505 1506 rtm_addrs |= RTA_NETMASK; 1507 switch (af) { 1508 #ifdef INET6 1509 case AF_INET6: 1510 { 1511 struct sockaddr_in6 *sin6 = 1512 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1513 1514 max = 128; 1515 p = (char *)&sin6->sin6_addr; 1516 sin6->sin6_family = AF_INET6; 1517 sin6->sin6_len = sizeof(*sin6); 1518 break; 1519 } 1520 #endif 1521 #ifdef INET 1522 case AF_INET: 1523 { 1524 struct sockaddr_in *sin = 1525 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1526 1527 max = 32; 1528 p = (char *)&sin->sin_addr; 1529 sin->sin_family = AF_INET; 1530 sin->sin_len = sizeof(*sin); 1531 break; 1532 } 1533 #endif 1534 default: 1535 errx(EX_OSERR, "prefixlen not supported in this af"); 1536 } 1537 1538 if (len < 0 || max < len) 1539 errx(EX_USAGE, "%s: invalid prefixlen", str); 1540 1541 q = len >> 3; 1542 r = len & 7; 1543 memset((void *)p, 0, max / 8); 1544 if (q > 0) 1545 memset((void *)p, 0xff, q); 1546 if (r > 0) 1547 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1548 if (len == max) 1549 return (-1); 1550 else 1551 return (len); 1552 } 1553 1554 #ifndef FSTACK 1555 static void 1556 interfaces(void) 1557 { 1558 size_t needed; 1559 int mib[6]; 1560 char *buf, *lim, *next, count = 0; 1561 struct rt_msghdr *rtm; 1562 1563 retry2: 1564 mib[0] = CTL_NET; 1565 mib[1] = PF_ROUTE; 1566 mib[2] = 0; /* protocol */ 1567 mib[3] = AF_UNSPEC; 1568 mib[4] = NET_RT_IFLIST; 1569 mib[5] = 0; /* no flags */ 1570 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1571 err(EX_OSERR, "route-sysctl-estimate"); 1572 if ((buf = malloc(needed)) == NULL) 1573 errx(EX_OSERR, "malloc failed"); 1574 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1575 if (errno == ENOMEM && count++ < 10) { 1576 warnx("Routing table grew, retrying"); 1577 sleep(1); 1578 free(buf); 1579 goto retry2; 1580 } 1581 err(EX_OSERR, "actual retrieval of interface table"); 1582 } 1583 lim = buf + needed; 1584 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1585 rtm = (struct rt_msghdr *)(void *)next; 1586 print_rtmsg(rtm, rtm->rtm_msglen); 1587 } 1588 } 1589 1590 static void 1591 monitor(int argc, char *argv[]) 1592 { 1593 int n, fib, error; 1594 char msg[2048], *endptr; 1595 1596 fib = defaultfib; 1597 while (argc > 1) { 1598 argc--; 1599 argv++; 1600 if (**argv != '-') 1601 usage(*argv); 1602 switch (keyword(*argv + 1)) { 1603 case K_FIB: 1604 if (!--argc) 1605 usage(*argv); 1606 errno = 0; 1607 fib = strtol(*++argv, &endptr, 0); 1608 if (errno == 0) { 1609 if (*endptr != '\0' || 1610 fib < 0 || 1611 (numfibs != -1 && fib > numfibs - 1)) 1612 errno = EINVAL; 1613 } 1614 if (errno) 1615 errx(EX_USAGE, "invalid fib number: %s", *argv); 1616 break; 1617 default: 1618 usage(*argv); 1619 } 1620 } 1621 error = set_sofib(fib); 1622 if (error) 1623 errx(EX_USAGE, "invalid fib number: %d", fib); 1624 1625 verbose = 1; 1626 if (debugonly) { 1627 interfaces(); 1628 exit(0); 1629 } 1630 for (;;) { 1631 time_t now; 1632 n = read(s, msg, 2048); 1633 now = time(NULL); 1634 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1635 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1636 } 1637 } 1638 #endif 1639 1640 static int 1641 rtmsg(int cmd, int flags, int fib) 1642 { 1643 int rlen; 1644 char *cp = m_rtmsg.m_space; 1645 int l; 1646 1647 #define NEXTADDR(w, u) \ 1648 if (rtm_addrs & (w)) { \ 1649 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1650 sizeof(long) : \ 1651 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1652 | (sizeof(long) - 1)); \ 1653 memmove(cp, (char *)&(u), l); \ 1654 cp += l; \ 1655 if (verbose) \ 1656 sodump((struct sockaddr *)&(u), #w); \ 1657 } 1658 1659 errno = 0; 1660 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1661 if (cmd == 'a') 1662 cmd = RTM_ADD; 1663 else if (cmd == 'c') 1664 cmd = RTM_CHANGE; 1665 else if (cmd == 'g' || cmd == 's') { 1666 cmd = RTM_GET; 1667 if (so[RTAX_IFP].ss_family == 0) { 1668 so[RTAX_IFP].ss_family = AF_LINK; 1669 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1670 rtm_addrs |= RTA_IFP; 1671 } 1672 } else 1673 cmd = RTM_DELETE; 1674 #define rtm m_rtmsg.m_rtm 1675 rtm.rtm_type = cmd; 1676 rtm.rtm_flags = flags; 1677 rtm.rtm_version = RTM_VERSION; 1678 rtm.rtm_seq = ++rtm_seq; 1679 rtm.rtm_addrs = rtm_addrs; 1680 rtm.rtm_rmx = rt_metrics; 1681 rtm.rtm_inits = rtm_inits; 1682 1683 NEXTADDR(RTA_DST, so[RTAX_DST]); 1684 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1685 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1686 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1687 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1688 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1689 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1690 if (verbose) 1691 print_rtmsg(&rtm, l); 1692 if (debugonly) 1693 return (0); 1694 #ifndef FSTACK 1695 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1696 #else 1697 if (cmd == RTM_GET) { 1698 rlen = rtioctl((char *)&m_rtmsg, l, sizeof(m_rtmsg)); 1699 } else { 1700 rlen = write(s, (char *)&m_rtmsg, l); 1701 } 1702 if (rlen < 0) { 1703 #endif 1704 switch (errno) { 1705 case EPERM: 1706 err(1, "writing to routing socket"); 1707 break; 1708 case ESRCH: 1709 warnx("route has not been found"); 1710 break; 1711 case EEXIST: 1712 /* Handled by newroute() */ 1713 break; 1714 default: 1715 warn("writing to routing socket"); 1716 } 1717 return (-1); 1718 } 1719 if (cmd == RTM_GET) { 1720 #ifndef FSTACK 1721 do { 1722 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1723 } while (l > 0 && (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid)); 1724 #else 1725 l = rlen; 1726 #endif 1727 if (l < 0) 1728 warn("read from routing socket"); 1729 else 1730 print_getmsg(&rtm, l, fib); 1731 } 1732 #undef rtm 1733 return (0); 1734 } 1735 1736 static const char *const msgtypes[] = { 1737 "", 1738 "RTM_ADD: Add Route", 1739 "RTM_DELETE: Delete Route", 1740 "RTM_CHANGE: Change Metrics or flags", 1741 "RTM_GET: Report Metrics", 1742 "RTM_LOSING: Kernel Suspects Partitioning", 1743 "RTM_REDIRECT: Told to use different route", 1744 "RTM_MISS: Lookup failed on this address", 1745 "RTM_LOCK: fix specified metrics", 1746 "RTM_OLDADD: caused by SIOCADDRT", 1747 "RTM_OLDDEL: caused by SIOCDELRT", 1748 "RTM_RESOLVE: Route created by cloning", 1749 "RTM_NEWADDR: address being added to iface", 1750 "RTM_DELADDR: address being removed from iface", 1751 "RTM_IFINFO: iface status change", 1752 "RTM_NEWMADDR: new multicast group membership on iface", 1753 "RTM_DELMADDR: multicast group membership removed from iface", 1754 "RTM_IFANNOUNCE: interface arrival/departure", 1755 "RTM_IEEE80211: IEEE 802.11 wireless event", 1756 }; 1757 1758 static const char metricnames[] = 1759 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1760 "\1mtu"; 1761 static const char routeflags[] = 1762 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1763 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1764 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1765 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1766 static const char ifnetflags[] = 1767 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1768 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1769 "\017LINK2\020MULTICAST"; 1770 static const char addrnames[] = 1771 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1772 1773 static const char errfmt[] = 1774 "\n%s: truncated route message, only %zu bytes left\n"; 1775 1776 static void 1777 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1778 { 1779 struct if_msghdr *ifm; 1780 struct ifa_msghdr *ifam; 1781 #ifdef RTM_NEWMADDR 1782 struct ifma_msghdr *ifmam; 1783 #endif 1784 struct if_announcemsghdr *ifan; 1785 const char *state; 1786 1787 if (verbose == 0) 1788 return; 1789 if (rtm->rtm_version != RTM_VERSION) { 1790 (void)printf("routing message version %d not understood\n", 1791 rtm->rtm_version); 1792 return; 1793 } 1794 if (rtm->rtm_type < nitems(msgtypes)) 1795 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1796 else 1797 (void)printf("unknown type %d: ", rtm->rtm_type); 1798 (void)printf("len %d, ", rtm->rtm_msglen); 1799 1800 #define REQUIRE(x) do { \ 1801 if (msglen < sizeof(x)) \ 1802 goto badlen; \ 1803 else \ 1804 msglen -= sizeof(x); \ 1805 } while (0) 1806 1807 switch (rtm->rtm_type) { 1808 case RTM_IFINFO: 1809 REQUIRE(struct if_msghdr); 1810 ifm = (struct if_msghdr *)rtm; 1811 (void)printf("if# %d, ", ifm->ifm_index); 1812 switch (ifm->ifm_data.ifi_link_state) { 1813 case LINK_STATE_DOWN: 1814 state = "down"; 1815 break; 1816 case LINK_STATE_UP: 1817 state = "up"; 1818 break; 1819 default: 1820 state = "unknown"; 1821 break; 1822 } 1823 (void)printf("link: %s, flags:", state); 1824 printb(ifm->ifm_flags, ifnetflags); 1825 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1826 break; 1827 case RTM_NEWADDR: 1828 case RTM_DELADDR: 1829 REQUIRE(struct ifa_msghdr); 1830 ifam = (struct ifa_msghdr *)rtm; 1831 (void)printf("metric %d, flags:", ifam->ifam_metric); 1832 printb(ifam->ifam_flags, routeflags); 1833 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1834 break; 1835 #ifdef RTM_NEWMADDR 1836 case RTM_NEWMADDR: 1837 case RTM_DELMADDR: 1838 REQUIRE(struct ifma_msghdr); 1839 ifmam = (struct ifma_msghdr *)rtm; 1840 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1841 break; 1842 #endif 1843 case RTM_IFANNOUNCE: 1844 REQUIRE(struct if_announcemsghdr); 1845 ifan = (struct if_announcemsghdr *)rtm; 1846 (void)printf("if# %d, what: ", ifan->ifan_index); 1847 switch (ifan->ifan_what) { 1848 case IFAN_ARRIVAL: 1849 (void)printf("arrival"); 1850 break; 1851 case IFAN_DEPARTURE: 1852 printf("departure"); 1853 break; 1854 default: 1855 printf("#%d", ifan->ifan_what); 1856 break; 1857 } 1858 printf("\n"); 1859 fflush(stdout); 1860 break; 1861 1862 default: 1863 printf("pid: %ld, seq %d, errno %d, flags:", 1864 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1865 printb(rtm->rtm_flags, routeflags); 1866 pmsg_common(rtm, msglen); 1867 } 1868 1869 return; 1870 1871 badlen: 1872 (void)printf(errfmt, __func__, msglen); 1873 #undef REQUIRE 1874 } 1875 1876 static void 1877 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1878 { 1879 struct sockaddr *sp[RTAX_MAX]; 1880 struct timespec ts; 1881 char *cp; 1882 int i; 1883 1884 memset(sp, 0, sizeof(sp)); 1885 (void)printf(" route to: %s\n", 1886 routename((struct sockaddr *)&so[RTAX_DST])); 1887 if (rtm->rtm_version != RTM_VERSION) { 1888 warnx("routing message version %d not understood", 1889 rtm->rtm_version); 1890 return; 1891 } 1892 if (rtm->rtm_msglen > msglen) { 1893 warnx("message length mismatch, in packet %d, returned %d", 1894 rtm->rtm_msglen, msglen); 1895 return; 1896 } 1897 if (rtm->rtm_errno) { 1898 errno = rtm->rtm_errno; 1899 warn("message indicates error %d", errno); 1900 return; 1901 } 1902 cp = ((char *)(rtm + 1)); 1903 for (i = 0; i < RTAX_MAX; i++) 1904 if (rtm->rtm_addrs & (1 << i)) { 1905 sp[i] = (struct sockaddr *)cp; 1906 cp += SA_SIZE((struct sockaddr *)cp); 1907 } 1908 if ((rtm->rtm_addrs & RTA_IFP) && 1909 (sp[RTAX_IFP]->sa_family != AF_LINK || 1910 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1911 sp[RTAX_IFP] = NULL; 1912 if (sp[RTAX_DST]) 1913 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1914 if (sp[RTAX_NETMASK]) 1915 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1916 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1917 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1918 if (fib >= 0) 1919 (void)printf(" fib: %u\n", (unsigned int)fib); 1920 if (sp[RTAX_IFP]) 1921 (void)printf(" interface: %.*s\n", 1922 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1923 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1924 (void)printf(" flags: "); 1925 printb(rtm->rtm_flags, routeflags); 1926 1927 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1928 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1929 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1930 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1931 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1932 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1933 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1934 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1935 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1936 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1937 if (rtm->rtm_rmx.rmx_expire > 0) 1938 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1939 else 1940 ts.tv_sec = 0; 1941 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1942 lock(EXPIRE)); 1943 #undef lock 1944 #undef msec 1945 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1946 if (verbose) 1947 pmsg_common(rtm, msglen); 1948 else if (rtm->rtm_addrs &~ RTA_IGN) { 1949 (void)printf("sockaddrs: "); 1950 printb(rtm->rtm_addrs, addrnames); 1951 putchar('\n'); 1952 } 1953 #undef RTA_IGN 1954 } 1955 1956 static void 1957 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1958 { 1959 1960 (void)printf("\nlocks: "); 1961 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1962 (void)printf(" inits: "); 1963 printb(rtm->rtm_inits, metricnames); 1964 if (msglen > sizeof(struct rt_msghdr)) 1965 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1966 msglen - sizeof(struct rt_msghdr)); 1967 else 1968 (void)fflush(stdout); 1969 } 1970 1971 static void 1972 pmsg_addrs(char *cp, int addrs, size_t len) 1973 { 1974 struct sockaddr *sa; 1975 int i; 1976 1977 if (addrs == 0) { 1978 (void)putchar('\n'); 1979 return; 1980 } 1981 (void)printf("\nsockaddrs: "); 1982 printb(addrs, addrnames); 1983 putchar('\n'); 1984 for (i = 0; i < RTAX_MAX; i++) 1985 if (addrs & (1 << i)) { 1986 sa = (struct sockaddr *)cp; 1987 if (len == 0 || len < SA_SIZE(sa)) { 1988 (void)printf(errfmt, __func__, len); 1989 break; 1990 } 1991 (void)printf(" %s", routename(sa)); 1992 len -= SA_SIZE(sa); 1993 cp += SA_SIZE(sa); 1994 } 1995 (void)putchar('\n'); 1996 (void)fflush(stdout); 1997 } 1998 1999 static void 2000 printb(int b, const char *str) 2001 { 2002 int i; 2003 int gotsome = 0; 2004 2005 if (b == 0) 2006 return; 2007 while ((i = *str++) != 0) { 2008 if (b & (1 << (i-1))) { 2009 if (gotsome == 0) 2010 i = '<'; 2011 else 2012 i = ','; 2013 putchar(i); 2014 gotsome = 1; 2015 for (; (i = *str) > 32; str++) 2016 putchar(i); 2017 } else 2018 while (*str > 32) 2019 str++; 2020 } 2021 if (gotsome) 2022 putchar('>'); 2023 } 2024 2025 int 2026 keyword(const char *cp) 2027 { 2028 const struct keytab *kt = keywords; 2029 2030 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 2031 kt++; 2032 return (kt->kt_i); 2033 } 2034 2035 static void 2036 sodump(struct sockaddr *sa, const char *which) 2037 { 2038 #ifdef INET6 2039 char nbuf[INET6_ADDRSTRLEN]; 2040 #endif 2041 2042 switch (sa->sa_family) { 2043 case AF_LINK: 2044 (void)printf("%s: link %s; ", which, 2045 link_ntoa((struct sockaddr_dl *)(void *)sa)); 2046 break; 2047 #ifdef INET 2048 case AF_INET: 2049 (void)printf("%s: inet %s; ", which, 2050 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 2051 break; 2052 #endif 2053 #ifdef INET6 2054 case AF_INET6: 2055 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 2056 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 2057 sizeof(nbuf))); 2058 break; 2059 #endif 2060 } 2061 (void)fflush(stdout); 2062 } 2063 2064 /* States*/ 2065 #define VIRGIN 0 2066 #define GOTONE 1 2067 #define GOTTWO 2 2068 /* Inputs */ 2069 #define DIGIT (4*0) 2070 #define END (4*1) 2071 #define DELIM (4*2) 2072 2073 static void 2074 sockaddr(char *addr, struct sockaddr *sa, size_t size) 2075 { 2076 char *cp = (char *)sa; 2077 char *cplim = cp + size; 2078 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 2079 2080 memset(cp, 0, size); 2081 cp++; 2082 do { 2083 if ((*addr >= '0') && (*addr <= '9')) { 2084 new = *addr - '0'; 2085 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2086 new = *addr - 'a' + 10; 2087 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2088 new = *addr - 'A' + 10; 2089 } else if (*addr == '\0') 2090 state |= END; 2091 else 2092 state |= DELIM; 2093 addr++; 2094 switch (state /* | INPUT */) { 2095 case GOTTWO | DIGIT: 2096 *cp++ = byte; /*FALLTHROUGH*/ 2097 case VIRGIN | DIGIT: 2098 state = GOTONE; byte = new; continue; 2099 case GOTONE | DIGIT: 2100 state = GOTTWO; byte = new + (byte << 4); continue; 2101 default: /* | DELIM */ 2102 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2103 case GOTONE | END: 2104 case GOTTWO | END: 2105 *cp++ = byte; /* FALLTHROUGH */ 2106 case VIRGIN | END: 2107 break; 2108 } 2109 break; 2110 } while (cp < cplim); 2111 sa->sa_len = cp - (char *)sa; 2112 } 2113