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 __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 <stdbool.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <sysexits.h> 70 #include <time.h> 71 #include <unistd.h> 72 #include <ifaddrs.h> 73 74 struct fibl { 75 TAILQ_ENTRY(fibl) fl_next; 76 77 int fl_num; 78 int fl_error; 79 int fl_errno; 80 }; 81 82 static struct keytab { 83 const char *kt_cp; 84 int kt_i; 85 } const keywords[] = { 86 #include "keywords.h" 87 {0, 0} 88 }; 89 90 static struct sockaddr_storage so[RTAX_MAX]; 91 static int pid, rtm_addrs; 92 static int s; 93 static int nflag, af, qflag, tflag; 94 static int verbose, aflen; 95 static int locking, lockrest, debugonly; 96 static struct rt_metrics rt_metrics; 97 static u_long rtm_inits; 98 static uid_t uid; 99 static int defaultfib; 100 static int numfibs; 101 static char domain[MAXHOSTNAMELEN + 1]; 102 static bool domain_initialized; 103 static int rtm_seq; 104 static char rt_line[NI_MAXHOST]; 105 static char net_line[MAXHOSTNAMELEN + 1]; 106 107 static struct { 108 struct rt_msghdr m_rtm; 109 char m_space[512]; 110 } m_rtmsg; 111 112 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 113 114 static void printb(int, const char *); 115 static void flushroutes(int argc, char *argv[]); 116 static int flushroutes_fib(int); 117 static int getaddr(int, char *, struct hostent **, int); 118 static int keyword(const char *); 119 #ifdef INET 120 static void inet_makenetandmask(u_long, struct sockaddr_in *, 121 struct sockaddr_in *, u_long); 122 #endif 123 #ifdef INET6 124 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 125 #endif 126 static void interfaces(void); 127 static void monitor(int, char*[]); 128 static const char *netname(struct sockaddr *); 129 static void newroute(int, char **); 130 static int newroute_fib(int, char *, int); 131 static void pmsg_addrs(char *, int, size_t); 132 static void pmsg_common(struct rt_msghdr *, size_t); 133 static int prefixlen(const char *); 134 static void print_getmsg(struct rt_msghdr *, int, int); 135 static void print_rtmsg(struct rt_msghdr *, size_t); 136 static const char *routename(struct sockaddr *); 137 static int rtmsg(int, int, int); 138 static void set_metric(char *, int); 139 static int set_sofib(int); 140 static void sockaddr(char *, struct sockaddr *, size_t); 141 static void sodump(struct sockaddr *, const char *); 142 static int fiboptlist_csv(const char *, struct fibl_head_t *); 143 static int fiboptlist_range(const char *, struct fibl_head_t *); 144 145 static void usage(const char *) __dead2; 146 147 static void 148 usage(const char *cp) 149 { 150 if (cp != NULL) 151 warnx("bad keyword: %s", cp); 152 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 153 /* NOTREACHED */ 154 } 155 156 int 157 main(int argc, char **argv) 158 { 159 int ch; 160 size_t len; 161 162 if (argc < 2) 163 usage(NULL); 164 165 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 166 switch(ch) { 167 case '4': 168 #ifdef INET 169 af = AF_INET; 170 aflen = sizeof(struct sockaddr_in); 171 #else 172 errx(1, "IPv4 support is not compiled in"); 173 #endif 174 break; 175 case '6': 176 #ifdef INET6 177 af = AF_INET6; 178 aflen = sizeof(struct sockaddr_in6); 179 #else 180 errx(1, "IPv6 support is not compiled in"); 181 #endif 182 break; 183 case 'n': 184 nflag = 1; 185 break; 186 case 'q': 187 qflag = 1; 188 break; 189 case 'v': 190 verbose = 1; 191 break; 192 case 't': 193 tflag = 1; 194 break; 195 case 'd': 196 debugonly = 1; 197 break; 198 case '?': 199 default: 200 usage(NULL); 201 } 202 argc -= optind; 203 argv += optind; 204 205 pid = getpid(); 206 uid = geteuid(); 207 if (tflag) 208 s = open(_PATH_DEVNULL, O_WRONLY, 0); 209 else 210 s = socket(PF_ROUTE, SOCK_RAW, 0); 211 if (s < 0) 212 err(EX_OSERR, "socket"); 213 214 len = sizeof(numfibs); 215 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 216 numfibs = -1; 217 218 len = sizeof(defaultfib); 219 if (numfibs != -1 && 220 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 221 0) == -1) 222 defaultfib = -1; 223 224 if (*argv != NULL) 225 switch (keyword(*argv)) { 226 case K_GET: 227 case K_SHOW: 228 uid = 0; 229 /* FALLTHROUGH */ 230 231 case K_CHANGE: 232 case K_ADD: 233 case K_DEL: 234 case K_DELETE: 235 newroute(argc, argv); 236 /* NOTREACHED */ 237 238 case K_MONITOR: 239 monitor(argc, argv); 240 /* NOTREACHED */ 241 242 case K_FLUSH: 243 flushroutes(argc, argv); 244 exit(0); 245 /* NOTREACHED */ 246 } 247 usage(*argv); 248 /* NOTREACHED */ 249 } 250 251 static int 252 set_sofib(int fib) 253 { 254 255 if (fib < 0) 256 return (0); 257 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 258 sizeof(fib))); 259 } 260 261 static int 262 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 263 { 264 struct fibl *fl; 265 char *str0, *str, *token, *endptr; 266 int fib[2], i, error; 267 268 str0 = str = strdup(arg); 269 error = 0; 270 i = 0; 271 while ((token = strsep(&str, "-")) != NULL) { 272 switch (i) { 273 case 0: 274 case 1: 275 errno = 0; 276 fib[i] = strtol(token, &endptr, 0); 277 if (errno == 0) { 278 if (*endptr != '\0' || 279 fib[i] < 0 || 280 (numfibs != -1 && fib[i] > numfibs - 1)) 281 errno = EINVAL; 282 } 283 if (errno) 284 error = 1; 285 break; 286 default: 287 error = 1; 288 } 289 if (error) 290 goto fiboptlist_range_ret; 291 i++; 292 } 293 if (fib[0] >= fib[1]) { 294 error = 1; 295 goto fiboptlist_range_ret; 296 } 297 for (i = fib[0]; i <= fib[1]; i++) { 298 fl = calloc(1, sizeof(*fl)); 299 if (fl == NULL) { 300 error = 1; 301 goto fiboptlist_range_ret; 302 } 303 fl->fl_num = i; 304 TAILQ_INSERT_TAIL(flh, fl, fl_next); 305 } 306 fiboptlist_range_ret: 307 free(str0); 308 return (error); 309 } 310 311 #define ALLSTRLEN 64 312 static int 313 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 314 { 315 struct fibl *fl; 316 char *str0, *str, *token, *endptr; 317 int fib, error; 318 319 str0 = str = NULL; 320 if (strcmp("all", arg) == 0) { 321 str = calloc(1, ALLSTRLEN); 322 if (str == NULL) { 323 error = 1; 324 goto fiboptlist_csv_ret; 325 } 326 if (numfibs > 1) 327 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 328 else 329 snprintf(str, ALLSTRLEN - 1, "%d", 0); 330 } else if (strcmp("default", arg) == 0) { 331 str0 = str = calloc(1, ALLSTRLEN); 332 if (str == NULL) { 333 error = 1; 334 goto fiboptlist_csv_ret; 335 } 336 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 337 } else 338 str0 = str = strdup(arg); 339 340 error = 0; 341 while ((token = strsep(&str, ",")) != NULL) { 342 if (*token != '-' && strchr(token, '-') != NULL) { 343 error = fiboptlist_range(token, flh); 344 if (error) 345 goto fiboptlist_csv_ret; 346 } else { 347 errno = 0; 348 fib = strtol(token, &endptr, 0); 349 if (errno == 0) { 350 if (*endptr != '\0' || 351 fib < 0 || 352 (numfibs != -1 && fib > numfibs - 1)) 353 errno = EINVAL; 354 } 355 if (errno) { 356 error = 1; 357 goto fiboptlist_csv_ret; 358 } 359 fl = calloc(1, sizeof(*fl)); 360 if (fl == NULL) { 361 error = 1; 362 goto fiboptlist_csv_ret; 363 } 364 fl->fl_num = fib; 365 TAILQ_INSERT_TAIL(flh, fl, fl_next); 366 } 367 } 368 fiboptlist_csv_ret: 369 if (str0 != NULL) 370 free(str0); 371 return (error); 372 } 373 374 /* 375 * Purge all entries in the routing tables not 376 * associated with network interfaces. 377 */ 378 static void 379 flushroutes(int argc, char *argv[]) 380 { 381 struct fibl *fl; 382 int error; 383 384 if (uid != 0 && !debugonly && !tflag) 385 errx(EX_NOPERM, "must be root to alter routing table"); 386 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 387 388 TAILQ_INIT(&fibl_head); 389 while (argc > 1) { 390 argc--; 391 argv++; 392 if (**argv != '-') 393 usage(*argv); 394 switch (keyword(*argv + 1)) { 395 #ifdef INET 396 case K_4: 397 case K_INET: 398 af = AF_INET; 399 break; 400 #endif 401 #ifdef INET6 402 case K_6: 403 case K_INET6: 404 af = AF_INET6; 405 break; 406 #endif 407 case K_LINK: 408 af = AF_LINK; 409 break; 410 case K_FIB: 411 if (!--argc) 412 usage(*argv); 413 error = fiboptlist_csv(*++argv, &fibl_head); 414 if (error) 415 errx(EX_USAGE, "invalid fib number: %s", *argv); 416 break; 417 default: 418 usage(*argv); 419 } 420 } 421 if (TAILQ_EMPTY(&fibl_head)) { 422 error = fiboptlist_csv("default", &fibl_head); 423 if (error) 424 errx(EX_OSERR, "fiboptlist_csv failed."); 425 } 426 TAILQ_FOREACH(fl, &fibl_head, fl_next) 427 flushroutes_fib(fl->fl_num); 428 } 429 430 static int 431 flushroutes_fib(int fib) 432 { 433 struct rt_msghdr *rtm; 434 size_t needed; 435 char *buf, *next, *lim; 436 int mib[7], rlen, seqno, count = 0; 437 int error; 438 439 error = set_sofib(fib); 440 if (error) { 441 warn("fib number %d is ignored", fib); 442 return (error); 443 } 444 445 retry: 446 mib[0] = CTL_NET; 447 mib[1] = PF_ROUTE; 448 mib[2] = 0; /* protocol */ 449 mib[3] = AF_UNSPEC; 450 mib[4] = NET_RT_DUMP; 451 mib[5] = 0; /* no flags */ 452 mib[6] = fib; 453 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 454 err(EX_OSERR, "route-sysctl-estimate"); 455 if ((buf = malloc(needed)) == NULL) 456 errx(EX_OSERR, "malloc failed"); 457 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 458 if (errno == ENOMEM && count++ < 10) { 459 warnx("Routing table grew, retrying"); 460 sleep(1); 461 free(buf); 462 goto retry; 463 } 464 err(EX_OSERR, "route-sysctl-get"); 465 } 466 lim = buf + needed; 467 if (verbose) 468 (void)printf("Examining routing table from sysctl\n"); 469 seqno = 0; /* ??? */ 470 for (next = buf; next < lim; next += rtm->rtm_msglen) { 471 rtm = (struct rt_msghdr *)(void *)next; 472 if (verbose) 473 print_rtmsg(rtm, rtm->rtm_msglen); 474 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 475 continue; 476 if (af != 0) { 477 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 478 479 if (sa->sa_family != af) 480 continue; 481 } 482 if (debugonly) 483 continue; 484 rtm->rtm_type = RTM_DELETE; 485 rtm->rtm_seq = seqno; 486 rlen = write(s, next, rtm->rtm_msglen); 487 if (rlen < 0 && errno == EPERM) 488 err(1, "write to routing socket"); 489 if (rlen < (int)rtm->rtm_msglen) { 490 warn("write to routing socket"); 491 (void)printf("got only %d for rlen\n", rlen); 492 free(buf); 493 goto retry; 494 break; 495 } 496 seqno++; 497 if (qflag) 498 continue; 499 if (verbose) 500 print_rtmsg(rtm, rlen); 501 else { 502 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 503 504 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 505 routename(sa) : netname(sa)); 506 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 507 printf("%-20.20s ", routename(sa)); 508 if (fib >= 0) 509 printf("-fib %-3d ", fib); 510 printf("done\n"); 511 } 512 } 513 return (error); 514 } 515 516 static const char * 517 routename(struct sockaddr *sa) 518 { 519 struct sockaddr_dl *sdl; 520 const char *cp; 521 int n; 522 523 if (!domain_initialized) { 524 domain_initialized = true; 525 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 526 (cp = strchr(domain, '.'))) { 527 domain[MAXHOSTNAMELEN] = '\0'; 528 (void)strcpy(domain, cp + 1); 529 } else 530 domain[0] = '\0'; 531 } 532 533 /* If the address is zero-filled, use "default". */ 534 if (sa->sa_len == 0 && nflag == 0) 535 return ("default"); 536 #if defined(INET) || defined(INET6) 537 switch (sa->sa_family) { 538 #ifdef INET 539 case AF_INET: 540 /* If the address is zero-filled, use "default". */ 541 if (nflag == 0 && 542 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 543 INADDR_ANY) 544 return("default"); 545 break; 546 #endif 547 #ifdef INET6 548 case AF_INET6: 549 /* If the address is zero-filled, use "default". */ 550 if (nflag == 0 && 551 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 552 return("default"); 553 break; 554 #endif 555 } 556 #endif 557 558 switch (sa->sa_family) { 559 #if defined(INET) || defined(INET6) 560 #ifdef INET 561 case AF_INET: 562 #endif 563 #ifdef INET6 564 case AF_INET6: 565 #endif 566 { 567 struct sockaddr_storage ss; 568 int error; 569 char *p; 570 571 memset(&ss, 0, sizeof(ss)); 572 if (sa->sa_len == 0) 573 ss.ss_family = sa->sa_family; 574 else 575 memcpy(&ss, sa, sa->sa_len); 576 /* Expand sa->sa_len because it could be shortened. */ 577 if (sa->sa_family == AF_INET) 578 ss.ss_len = sizeof(struct sockaddr_in); 579 else if (sa->sa_family == AF_INET6) 580 ss.ss_len = sizeof(struct sockaddr_in6); 581 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 582 rt_line, sizeof(rt_line), NULL, 0, 583 (nflag == 0) ? 0 : NI_NUMERICHOST); 584 if (error) { 585 warnx("getnameinfo(): %s", gai_strerror(error)); 586 strncpy(rt_line, "invalid", sizeof(rt_line)); 587 } 588 589 /* Remove the domain part if any. */ 590 p = strchr(rt_line, '.'); 591 if (p != NULL && strcmp(p + 1, domain) == 0) 592 *p = '\0'; 593 594 return (rt_line); 595 break; 596 } 597 #endif 598 case AF_LINK: 599 sdl = (struct sockaddr_dl *)(void *)sa; 600 601 if (sdl->sdl_nlen == 0 && 602 sdl->sdl_alen == 0 && 603 sdl->sdl_slen == 0) { 604 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 605 sdl->sdl_index); 606 if (n > (int)sizeof(rt_line)) 607 rt_line[0] = '\0'; 608 return (rt_line); 609 } else 610 return (link_ntoa(sdl)); 611 break; 612 613 default: 614 { 615 u_short *sp = (u_short *)(void *)sa; 616 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 617 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 618 char *cpe = rt_line + sizeof(rt_line); 619 620 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 621 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 622 cps += n; 623 else 624 *cps = '\0'; 625 break; 626 } 627 } 628 return (rt_line); 629 } 630 631 /* 632 * Return the name of the network whose address is given. 633 * The address is assumed to be that of a net, not a host. 634 */ 635 static const char * 636 netname(struct sockaddr *sa) 637 { 638 struct sockaddr_dl *sdl; 639 int n; 640 #ifdef INET 641 struct netent *np = NULL; 642 const char *cp = NULL; 643 u_long i; 644 #endif 645 646 switch (sa->sa_family) { 647 #ifdef INET 648 case AF_INET: 649 { 650 struct in_addr in; 651 652 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 653 i = in.s_addr = ntohl(in.s_addr); 654 if (in.s_addr == 0) 655 cp = "default"; 656 else if (!nflag) { 657 np = getnetbyaddr(i, AF_INET); 658 if (np != NULL) 659 cp = np->n_name; 660 } 661 #define C(x) (unsigned)((x) & 0xff) 662 if (cp != NULL) 663 strncpy(net_line, cp, sizeof(net_line)); 664 else if ((in.s_addr & 0xffffff) == 0) 665 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 666 else if ((in.s_addr & 0xffff) == 0) 667 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 668 C(in.s_addr >> 16)); 669 else if ((in.s_addr & 0xff) == 0) 670 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 671 C(in.s_addr >> 16), C(in.s_addr >> 8)); 672 else 673 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 674 C(in.s_addr >> 16), C(in.s_addr >> 8), 675 C(in.s_addr)); 676 #undef C 677 break; 678 } 679 #endif 680 #ifdef INET6 681 case AF_INET6: 682 { 683 struct sockaddr_in6 sin6; 684 int niflags = 0; 685 686 memset(&sin6, 0, sizeof(sin6)); 687 memcpy(&sin6, sa, sa->sa_len); 688 sin6.sin6_len = sizeof(sin6); 689 sin6.sin6_family = AF_INET6; 690 if (nflag) 691 niflags |= NI_NUMERICHOST; 692 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 693 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 694 strncpy(net_line, "invalid", sizeof(net_line)); 695 696 return(net_line); 697 } 698 #endif 699 case AF_LINK: 700 sdl = (struct sockaddr_dl *)(void *)sa; 701 702 if (sdl->sdl_nlen == 0 && 703 sdl->sdl_alen == 0 && 704 sdl->sdl_slen == 0) { 705 n = snprintf(net_line, sizeof(net_line), "link#%d", 706 sdl->sdl_index); 707 if (n > (int)sizeof(net_line)) 708 net_line[0] = '\0'; 709 return (net_line); 710 } else 711 return (link_ntoa(sdl)); 712 break; 713 714 default: 715 { 716 u_short *sp = (u_short *)(void *)sa->sa_data; 717 u_short *splim = sp + ((sa->sa_len + 1)>>1); 718 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 719 char *cpe = net_line + sizeof(net_line); 720 721 while (sp < splim && cps < cpe) 722 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 723 cps += n; 724 else 725 *cps = '\0'; 726 break; 727 } 728 } 729 return (net_line); 730 } 731 732 static void 733 set_metric(char *value, int key) 734 { 735 int flag = 0; 736 char *endptr; 737 u_long noval, *valp = &noval; 738 739 switch (key) { 740 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 741 caseof(K_MTU, RTV_MTU, rmx_mtu); 742 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 743 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 744 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 745 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 746 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 747 caseof(K_RTT, RTV_RTT, rmx_rtt); 748 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 749 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 750 } 751 rtm_inits |= flag; 752 if (lockrest || locking) 753 rt_metrics.rmx_locks |= flag; 754 if (locking) 755 locking = 0; 756 errno = 0; 757 *valp = strtol(value, &endptr, 0); 758 if (errno == 0 && *endptr != '\0') 759 errno = EINVAL; 760 if (errno) 761 err(EX_USAGE, "%s", value); 762 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 763 struct timespec ts; 764 765 clock_gettime(CLOCK_REALTIME_FAST, &ts); 766 *valp += ts.tv_sec; 767 } 768 } 769 770 #define F_ISHOST 0x01 771 #define F_FORCENET 0x02 772 #define F_FORCEHOST 0x04 773 #define F_PROXY 0x08 774 #define F_INTERFACE 0x10 775 776 static void 777 newroute(int argc, char **argv) 778 { 779 struct hostent *hp; 780 struct fibl *fl; 781 char *cmd; 782 const char *dest, *gateway, *errmsg; 783 int key, error, flags, nrflags, fibnum; 784 785 if (uid != 0 && !debugonly && !tflag) 786 errx(EX_NOPERM, "must be root to alter routing table"); 787 dest = NULL; 788 gateway = NULL; 789 flags = RTF_STATIC; 790 nrflags = 0; 791 hp = NULL; 792 TAILQ_INIT(&fibl_head); 793 794 cmd = argv[0]; 795 if (*cmd != 'g' && *cmd != 's') 796 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 797 while (--argc > 0) { 798 if (**(++argv)== '-') { 799 switch (key = keyword(1 + *argv)) { 800 case K_LINK: 801 af = AF_LINK; 802 aflen = sizeof(struct sockaddr_dl); 803 break; 804 #ifdef INET 805 case K_4: 806 case K_INET: 807 af = AF_INET; 808 aflen = sizeof(struct sockaddr_in); 809 break; 810 #endif 811 #ifdef INET6 812 case K_6: 813 case K_INET6: 814 af = AF_INET6; 815 aflen = sizeof(struct sockaddr_in6); 816 break; 817 #endif 818 case K_SA: 819 af = PF_ROUTE; 820 aflen = sizeof(struct sockaddr_storage); 821 break; 822 case K_IFACE: 823 case K_INTERFACE: 824 nrflags |= F_INTERFACE; 825 break; 826 case K_NOSTATIC: 827 flags &= ~RTF_STATIC; 828 break; 829 case K_LOCK: 830 locking = 1; 831 break; 832 case K_LOCKREST: 833 lockrest = 1; 834 break; 835 case K_HOST: 836 nrflags |= F_FORCEHOST; 837 break; 838 case K_REJECT: 839 flags |= RTF_REJECT; 840 break; 841 case K_BLACKHOLE: 842 flags |= RTF_BLACKHOLE; 843 break; 844 case K_PROTO1: 845 flags |= RTF_PROTO1; 846 break; 847 case K_PROTO2: 848 flags |= RTF_PROTO2; 849 break; 850 case K_PROTO3: 851 flags |= RTF_PROTO3; 852 break; 853 case K_PROXY: 854 nrflags |= F_PROXY; 855 break; 856 case K_XRESOLVE: 857 flags |= RTF_XRESOLVE; 858 break; 859 case K_STATIC: 860 flags |= RTF_STATIC; 861 break; 862 case K_STICKY: 863 flags |= RTF_STICKY; 864 break; 865 case K_NOSTICK: 866 flags &= ~RTF_STICKY; 867 break; 868 case K_FIB: 869 if (!--argc) 870 usage(NULL); 871 error = fiboptlist_csv(*++argv, &fibl_head); 872 if (error) 873 errx(EX_USAGE, 874 "invalid fib number: %s", *argv); 875 break; 876 case K_IFA: 877 if (!--argc) 878 usage(NULL); 879 getaddr(RTAX_IFA, *++argv, 0, nrflags); 880 break; 881 case K_IFP: 882 if (!--argc) 883 usage(NULL); 884 getaddr(RTAX_IFP, *++argv, 0, nrflags); 885 break; 886 case K_GENMASK: 887 if (!--argc) 888 usage(NULL); 889 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 890 break; 891 case K_GATEWAY: 892 if (!--argc) 893 usage(NULL); 894 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 895 gateway = *argv; 896 break; 897 case K_DST: 898 if (!--argc) 899 usage(NULL); 900 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 901 nrflags |= F_ISHOST; 902 dest = *argv; 903 break; 904 case K_NETMASK: 905 if (!--argc) 906 usage(NULL); 907 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 908 /* FALLTHROUGH */ 909 case K_NET: 910 nrflags |= F_FORCENET; 911 break; 912 case K_PREFIXLEN: 913 if (!--argc) 914 usage(NULL); 915 if (prefixlen(*++argv) == -1) { 916 nrflags &= ~F_FORCENET; 917 nrflags |= F_ISHOST; 918 } else { 919 nrflags |= F_FORCENET; 920 nrflags &= ~F_ISHOST; 921 } 922 break; 923 case K_MTU: 924 case K_HOPCOUNT: 925 case K_EXPIRE: 926 case K_RECVPIPE: 927 case K_SENDPIPE: 928 case K_SSTHRESH: 929 case K_RTT: 930 case K_RTTVAR: 931 case K_WEIGHT: 932 if (!--argc) 933 usage(NULL); 934 set_metric(*++argv, key); 935 break; 936 default: 937 usage(1+*argv); 938 } 939 } else { 940 if ((rtm_addrs & RTA_DST) == 0) { 941 dest = *argv; 942 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 943 nrflags |= F_ISHOST; 944 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 945 gateway = *argv; 946 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 947 } else { 948 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 949 nrflags |= F_FORCENET; 950 } 951 } 952 } 953 954 /* Do some sanity checks on resulting request */ 955 if (so[RTAX_DST].ss_len == 0) { 956 warnx("destination parameter required"); 957 usage(NULL); 958 } 959 960 if (so[RTAX_NETMASK].ss_len != 0 && 961 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 962 warnx("destination and netmask family need to be the same"); 963 usage(NULL); 964 } 965 966 if (nrflags & F_FORCEHOST) { 967 nrflags |= F_ISHOST; 968 #ifdef INET6 969 if (af == AF_INET6) { 970 rtm_addrs &= ~RTA_NETMASK; 971 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 972 } 973 #endif 974 } 975 if (nrflags & F_FORCENET) 976 nrflags &= ~F_ISHOST; 977 flags |= RTF_UP; 978 if (nrflags & F_ISHOST) 979 flags |= RTF_HOST; 980 if ((nrflags & F_INTERFACE) == 0) 981 flags |= RTF_GATEWAY; 982 if (nrflags & F_PROXY) 983 flags |= RTF_ANNOUNCE; 984 if (dest == NULL) 985 dest = ""; 986 if (gateway == NULL) 987 gateway = ""; 988 989 if (TAILQ_EMPTY(&fibl_head)) { 990 error = fiboptlist_csv("default", &fibl_head); 991 if (error) 992 errx(EX_OSERR, "fiboptlist_csv failed."); 993 } 994 error = 0; 995 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 996 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 997 if (fl->fl_error) 998 fl->fl_errno = errno; 999 error += fl->fl_error; 1000 } 1001 if (*cmd == 'g' || *cmd == 's') 1002 exit(error); 1003 1004 error = 0; 1005 if (!qflag) { 1006 fibnum = 0; 1007 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1008 if (fl->fl_error == 0) 1009 fibnum++; 1010 } 1011 if (fibnum > 0) { 1012 int firstfib = 1; 1013 1014 printf("%s %s %s", cmd, 1015 (nrflags & F_ISHOST) ? "host" : "net", dest); 1016 if (*gateway) 1017 printf(": gateway %s", gateway); 1018 1019 if (numfibs > 1) { 1020 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1021 if (fl->fl_error == 0 1022 && fl->fl_num >= 0) { 1023 if (firstfib) { 1024 printf(" fib "); 1025 firstfib = 0; 1026 } 1027 printf("%d", fl->fl_num); 1028 if (fibnum-- > 1) 1029 printf(","); 1030 } 1031 } 1032 } 1033 printf("\n"); 1034 } 1035 1036 fibnum = 0; 1037 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1038 if (fl->fl_error != 0) { 1039 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1040 ? "host" : "net", dest); 1041 if (*gateway) 1042 printf(": gateway %s", gateway); 1043 1044 if (fl->fl_num >= 0) 1045 printf(" fib %d", fl->fl_num); 1046 1047 switch (fl->fl_errno) { 1048 case ESRCH: 1049 errmsg = "not in table"; 1050 break; 1051 case EBUSY: 1052 errmsg = "entry in use"; 1053 break; 1054 case ENOBUFS: 1055 errmsg = "not enough memory"; 1056 break; 1057 case EADDRINUSE: 1058 /* 1059 * handle recursion avoidance 1060 * in rt_setgate() 1061 */ 1062 errmsg = "gateway uses the same route"; 1063 break; 1064 case EEXIST: 1065 errmsg = "route already in table"; 1066 break; 1067 default: 1068 errmsg = strerror(fl->fl_errno); 1069 break; 1070 } 1071 printf(": %s\n", errmsg); 1072 error = 1; 1073 } 1074 } 1075 } 1076 exit(error); 1077 } 1078 1079 static int 1080 newroute_fib(int fib, char *cmd, int flags) 1081 { 1082 int error; 1083 1084 error = set_sofib(fib); 1085 if (error) { 1086 warn("fib number %d is ignored", fib); 1087 return (error); 1088 } 1089 1090 error = rtmsg(*cmd, flags, fib); 1091 return (error); 1092 } 1093 1094 #ifdef INET 1095 static void 1096 inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1097 struct sockaddr_in *sin_mask, u_long bits) 1098 { 1099 u_long mask = 0; 1100 1101 rtm_addrs |= RTA_NETMASK; 1102 1103 /* 1104 * MSB of net should be meaningful. 0/0 is exception. 1105 */ 1106 if (net > 0) 1107 while ((net & 0xff000000) == 0) 1108 net <<= 8; 1109 1110 /* 1111 * If no /xx was specified we must calculate the 1112 * CIDR address. 1113 */ 1114 if ((bits == 0) && (net != 0)) { 1115 u_long i, j; 1116 1117 for(i = 0, j = 0xff; i < 4; i++) { 1118 if (net & j) { 1119 break; 1120 } 1121 j <<= 8; 1122 } 1123 /* i holds the first non zero bit */ 1124 bits = 32 - (i*8); 1125 } 1126 if (bits != 0) 1127 mask = 0xffffffff << (32 - bits); 1128 1129 sin->sin_addr.s_addr = htonl(net); 1130 sin_mask->sin_addr.s_addr = htonl(mask); 1131 sin_mask->sin_len = sizeof(struct sockaddr_in); 1132 sin_mask->sin_family = AF_INET; 1133 } 1134 #endif 1135 1136 #ifdef INET6 1137 /* 1138 * XXX the function may need more improvement... 1139 */ 1140 static int 1141 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1142 { 1143 struct in6_addr in6; 1144 1145 if (plen == NULL) { 1146 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1147 sin6->sin6_scope_id == 0) { 1148 plen = "0"; 1149 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1150 /* aggregatable global unicast - RFC2374 */ 1151 memset(&in6, 0, sizeof(in6)); 1152 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1153 &in6.s6_addr[8], 8)) 1154 plen = "64"; 1155 } 1156 } 1157 1158 if (plen == NULL || strcmp(plen, "128") == 0) 1159 return (1); 1160 rtm_addrs |= RTA_NETMASK; 1161 prefixlen(plen); 1162 return (0); 1163 } 1164 #endif 1165 1166 /* 1167 * Interpret an argument as a network address of some kind, 1168 * returning 1 if a host address, 0 if a network address. 1169 */ 1170 static int 1171 getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1172 { 1173 struct sockaddr *sa; 1174 #if defined(INET) 1175 struct sockaddr_in *sin; 1176 struct hostent *hp; 1177 struct netent *np; 1178 u_long val; 1179 char *q; 1180 #elif defined(INET6) 1181 char *q; 1182 #endif 1183 1184 if (idx < 0 || idx >= RTAX_MAX) 1185 usage("internal error"); 1186 if (af == 0) { 1187 #if defined(INET) 1188 af = AF_INET; 1189 aflen = sizeof(struct sockaddr_in); 1190 #elif defined(INET6) 1191 af = AF_INET6; 1192 aflen = sizeof(struct sockaddr_in6); 1193 #else 1194 af = AF_LINK; 1195 aflen = sizeof(struct sockaddr_dl); 1196 #endif 1197 } 1198 #ifndef INET 1199 hpp = NULL; 1200 #endif 1201 rtm_addrs |= (1 << idx); 1202 sa = (struct sockaddr *)&so[idx]; 1203 sa->sa_family = af; 1204 sa->sa_len = aflen; 1205 1206 switch (idx) { 1207 case RTAX_GATEWAY: 1208 if (nrflags & F_INTERFACE) { 1209 struct ifaddrs *ifap, *ifa; 1210 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1211 struct sockaddr_dl *sdl = NULL; 1212 1213 if (getifaddrs(&ifap)) 1214 err(EX_OSERR, "getifaddrs"); 1215 1216 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1217 if (ifa->ifa_addr->sa_family != AF_LINK) 1218 continue; 1219 1220 if (strcmp(str, ifa->ifa_name) != 0) 1221 continue; 1222 1223 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1224 } 1225 /* If we found it, then use it */ 1226 if (sdl != NULL) { 1227 /* 1228 * Note that we need to copy before calling 1229 * freeifaddrs(). 1230 */ 1231 memcpy(sdl0, sdl, sdl->sdl_len); 1232 } 1233 freeifaddrs(ifap); 1234 if (sdl != NULL) 1235 return(1); 1236 } 1237 break; 1238 case RTAX_IFP: 1239 sa->sa_family = AF_LINK; 1240 break; 1241 } 1242 if (strcmp(str, "default") == 0) { 1243 /* 1244 * Default is net 0.0.0.0/0 1245 */ 1246 switch (idx) { 1247 case RTAX_DST: 1248 nrflags |= F_FORCENET; 1249 getaddr(RTAX_NETMASK, str, 0, nrflags); 1250 break; 1251 } 1252 return (0); 1253 } 1254 switch (sa->sa_family) { 1255 #ifdef INET6 1256 case AF_INET6: 1257 { 1258 struct addrinfo hints, *res; 1259 int ecode; 1260 1261 q = NULL; 1262 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1263 *q = '\0'; 1264 memset(&hints, 0, sizeof(hints)); 1265 hints.ai_family = sa->sa_family; 1266 hints.ai_socktype = SOCK_DGRAM; 1267 ecode = getaddrinfo(str, NULL, &hints, &res); 1268 if (ecode != 0 || res->ai_family != AF_INET6 || 1269 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1270 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1271 memcpy(sa, res->ai_addr, res->ai_addrlen); 1272 freeaddrinfo(res); 1273 if (q != NULL) 1274 *q++ = '/'; 1275 if (idx == RTAX_DST) 1276 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1277 return (0); 1278 } 1279 #endif /* INET6 */ 1280 case AF_LINK: 1281 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1282 return (1); 1283 1284 case PF_ROUTE: 1285 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1286 return (1); 1287 #ifdef INET 1288 case AF_INET: 1289 #endif 1290 default: 1291 break; 1292 } 1293 1294 #ifdef INET 1295 sin = (struct sockaddr_in *)(void *)sa; 1296 if (hpp == NULL) 1297 hpp = &hp; 1298 *hpp = NULL; 1299 1300 q = strchr(str,'/'); 1301 if (q != NULL && idx == RTAX_DST) { 1302 *q = '\0'; 1303 if ((val = inet_network(str)) != INADDR_NONE) { 1304 inet_makenetandmask(val, sin, 1305 (struct sockaddr_in *)&so[RTAX_NETMASK], 1306 strtoul(q+1, 0, 0)); 1307 return (0); 1308 } 1309 *q = '/'; 1310 } 1311 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1312 inet_aton(str, &sin->sin_addr)) { 1313 val = sin->sin_addr.s_addr; 1314 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1315 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1316 return (1); 1317 else { 1318 val = ntohl(val); 1319 goto netdone; 1320 } 1321 } 1322 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1323 ((val = inet_network(str)) != INADDR_NONE || 1324 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1325 netdone: 1326 inet_makenetandmask(val, sin, 1327 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1328 return (0); 1329 } 1330 hp = gethostbyname(str); 1331 if (hp != NULL) { 1332 *hpp = hp; 1333 sin->sin_family = hp->h_addrtype; 1334 memmove((char *)&sin->sin_addr, hp->h_addr, 1335 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1336 return (1); 1337 } 1338 #endif 1339 errx(EX_NOHOST, "bad address: %s", str); 1340 } 1341 1342 static int 1343 prefixlen(const char *str) 1344 { 1345 int len = atoi(str), q, r; 1346 int max; 1347 char *p; 1348 1349 rtm_addrs |= RTA_NETMASK; 1350 switch (af) { 1351 #ifdef INET6 1352 case AF_INET6: 1353 { 1354 struct sockaddr_in6 *sin6 = 1355 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1356 1357 max = 128; 1358 p = (char *)&sin6->sin6_addr; 1359 sin6->sin6_family = AF_INET6; 1360 sin6->sin6_len = sizeof(*sin6); 1361 break; 1362 } 1363 #endif 1364 #ifdef INET 1365 case AF_INET: 1366 { 1367 struct sockaddr_in *sin = 1368 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1369 1370 max = 32; 1371 p = (char *)&sin->sin_addr; 1372 sin->sin_family = AF_INET; 1373 sin->sin_len = sizeof(*sin); 1374 break; 1375 } 1376 #endif 1377 default: 1378 errx(EX_OSERR, "prefixlen not supported in this af"); 1379 } 1380 1381 if (len < 0 || max < len) 1382 errx(EX_USAGE, "%s: invalid prefixlen", str); 1383 1384 q = len >> 3; 1385 r = len & 7; 1386 memset((void *)p, 0, max / 8); 1387 if (q > 0) 1388 memset((void *)p, 0xff, q); 1389 if (r > 0) 1390 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1391 if (len == max) 1392 return (-1); 1393 else 1394 return (len); 1395 } 1396 1397 static void 1398 interfaces(void) 1399 { 1400 size_t needed; 1401 int mib[6]; 1402 char *buf, *lim, *next, count = 0; 1403 struct rt_msghdr *rtm; 1404 1405 retry2: 1406 mib[0] = CTL_NET; 1407 mib[1] = PF_ROUTE; 1408 mib[2] = 0; /* protocol */ 1409 mib[3] = AF_UNSPEC; 1410 mib[4] = NET_RT_IFLIST; 1411 mib[5] = 0; /* no flags */ 1412 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1413 err(EX_OSERR, "route-sysctl-estimate"); 1414 if ((buf = malloc(needed)) == NULL) 1415 errx(EX_OSERR, "malloc failed"); 1416 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1417 if (errno == ENOMEM && count++ < 10) { 1418 warnx("Routing table grew, retrying"); 1419 sleep(1); 1420 free(buf); 1421 goto retry2; 1422 } 1423 err(EX_OSERR, "actual retrieval of interface table"); 1424 } 1425 lim = buf + needed; 1426 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1427 rtm = (struct rt_msghdr *)(void *)next; 1428 print_rtmsg(rtm, rtm->rtm_msglen); 1429 } 1430 } 1431 1432 static void 1433 monitor(int argc, char *argv[]) 1434 { 1435 int n, fib, error; 1436 char msg[2048], *endptr; 1437 1438 fib = defaultfib; 1439 while (argc > 1) { 1440 argc--; 1441 argv++; 1442 if (**argv != '-') 1443 usage(*argv); 1444 switch (keyword(*argv + 1)) { 1445 case K_FIB: 1446 if (!--argc) 1447 usage(*argv); 1448 errno = 0; 1449 fib = strtol(*++argv, &endptr, 0); 1450 if (errno == 0) { 1451 if (*endptr != '\0' || 1452 fib < 0 || 1453 (numfibs != -1 && fib > numfibs - 1)) 1454 errno = EINVAL; 1455 } 1456 if (errno) 1457 errx(EX_USAGE, "invalid fib number: %s", *argv); 1458 break; 1459 default: 1460 usage(*argv); 1461 } 1462 } 1463 error = set_sofib(fib); 1464 if (error) 1465 errx(EX_USAGE, "invalid fib number: %d", fib); 1466 1467 verbose = 1; 1468 if (debugonly) { 1469 interfaces(); 1470 exit(0); 1471 } 1472 for (;;) { 1473 time_t now; 1474 n = read(s, msg, 2048); 1475 now = time(NULL); 1476 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1477 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1478 } 1479 } 1480 1481 static int 1482 rtmsg(int cmd, int flags, int fib) 1483 { 1484 int rlen; 1485 char *cp = m_rtmsg.m_space; 1486 int l; 1487 1488 #define NEXTADDR(w, u) \ 1489 if (rtm_addrs & (w)) { \ 1490 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1491 sizeof(long) : \ 1492 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1493 | (sizeof(long) - 1)); \ 1494 memmove(cp, (char *)&(u), l); \ 1495 cp += l; \ 1496 if (verbose) \ 1497 sodump((struct sockaddr *)&(u), #w); \ 1498 } 1499 1500 errno = 0; 1501 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1502 if (cmd == 'a') 1503 cmd = RTM_ADD; 1504 else if (cmd == 'c') 1505 cmd = RTM_CHANGE; 1506 else if (cmd == 'g' || cmd == 's') { 1507 cmd = RTM_GET; 1508 if (so[RTAX_IFP].ss_family == 0) { 1509 so[RTAX_IFP].ss_family = AF_LINK; 1510 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1511 rtm_addrs |= RTA_IFP; 1512 } 1513 } else 1514 cmd = RTM_DELETE; 1515 #define rtm m_rtmsg.m_rtm 1516 rtm.rtm_type = cmd; 1517 rtm.rtm_flags = flags; 1518 rtm.rtm_version = RTM_VERSION; 1519 rtm.rtm_seq = ++rtm_seq; 1520 rtm.rtm_addrs = rtm_addrs; 1521 rtm.rtm_rmx = rt_metrics; 1522 rtm.rtm_inits = rtm_inits; 1523 1524 NEXTADDR(RTA_DST, so[RTAX_DST]); 1525 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1526 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1527 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1528 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1529 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1530 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1531 if (verbose) 1532 print_rtmsg(&rtm, l); 1533 if (debugonly) 1534 return (0); 1535 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1536 if (errno == EPERM) 1537 err(1, "writing to routing socket"); 1538 warn("writing to routing socket"); 1539 return (-1); 1540 } 1541 if (cmd == RTM_GET) { 1542 do { 1543 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1544 } while (l > 0 && (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid)); 1545 if (l < 0) 1546 warn("read from routing socket"); 1547 else 1548 print_getmsg(&rtm, l, fib); 1549 } 1550 #undef rtm 1551 return (0); 1552 } 1553 1554 static const char *const msgtypes[] = { 1555 "", 1556 "RTM_ADD: Add Route", 1557 "RTM_DELETE: Delete Route", 1558 "RTM_CHANGE: Change Metrics or flags", 1559 "RTM_GET: Report Metrics", 1560 "RTM_LOSING: Kernel Suspects Partitioning", 1561 "RTM_REDIRECT: Told to use different route", 1562 "RTM_MISS: Lookup failed on this address", 1563 "RTM_LOCK: fix specified metrics", 1564 "RTM_OLDADD: caused by SIOCADDRT", 1565 "RTM_OLDDEL: caused by SIOCDELRT", 1566 "RTM_RESOLVE: Route created by cloning", 1567 "RTM_NEWADDR: address being added to iface", 1568 "RTM_DELADDR: address being removed from iface", 1569 "RTM_IFINFO: iface status change", 1570 "RTM_NEWMADDR: new multicast group membership on iface", 1571 "RTM_DELMADDR: multicast group membership removed from iface", 1572 "RTM_IFANNOUNCE: interface arrival/departure", 1573 "RTM_IEEE80211: IEEE 802.11 wireless event", 1574 }; 1575 1576 static const char metricnames[] = 1577 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1578 "\1mtu"; 1579 static const char routeflags[] = 1580 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1581 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1582 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1583 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1584 static const char ifnetflags[] = 1585 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1586 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1587 "\017LINK2\020MULTICAST"; 1588 static const char addrnames[] = 1589 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1590 1591 static const char errfmt[] = 1592 "\n%s: truncated route message, only %zu bytes left\n"; 1593 1594 static void 1595 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1596 { 1597 struct if_msghdr *ifm; 1598 struct ifa_msghdr *ifam; 1599 #ifdef RTM_NEWMADDR 1600 struct ifma_msghdr *ifmam; 1601 #endif 1602 struct if_announcemsghdr *ifan; 1603 const char *state; 1604 1605 if (verbose == 0) 1606 return; 1607 if (rtm->rtm_version != RTM_VERSION) { 1608 (void)printf("routing message version %d not understood\n", 1609 rtm->rtm_version); 1610 return; 1611 } 1612 if (rtm->rtm_type < nitems(msgtypes)) 1613 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1614 else 1615 (void)printf("unknown type %d: ", rtm->rtm_type); 1616 (void)printf("len %d, ", rtm->rtm_msglen); 1617 1618 #define REQUIRE(x) do { \ 1619 if (msglen < sizeof(x)) \ 1620 goto badlen; \ 1621 else \ 1622 msglen -= sizeof(x); \ 1623 } while (0) 1624 1625 switch (rtm->rtm_type) { 1626 case RTM_IFINFO: 1627 REQUIRE(struct if_msghdr); 1628 ifm = (struct if_msghdr *)rtm; 1629 (void)printf("if# %d, ", ifm->ifm_index); 1630 switch (ifm->ifm_data.ifi_link_state) { 1631 case LINK_STATE_DOWN: 1632 state = "down"; 1633 break; 1634 case LINK_STATE_UP: 1635 state = "up"; 1636 break; 1637 default: 1638 state = "unknown"; 1639 break; 1640 } 1641 (void)printf("link: %s, flags:", state); 1642 printb(ifm->ifm_flags, ifnetflags); 1643 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1644 break; 1645 case RTM_NEWADDR: 1646 case RTM_DELADDR: 1647 REQUIRE(struct ifa_msghdr); 1648 ifam = (struct ifa_msghdr *)rtm; 1649 (void)printf("metric %d, flags:", ifam->ifam_metric); 1650 printb(ifam->ifam_flags, routeflags); 1651 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1652 break; 1653 #ifdef RTM_NEWMADDR 1654 case RTM_NEWMADDR: 1655 case RTM_DELMADDR: 1656 REQUIRE(struct ifma_msghdr); 1657 ifmam = (struct ifma_msghdr *)rtm; 1658 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1659 break; 1660 #endif 1661 case RTM_IFANNOUNCE: 1662 REQUIRE(struct if_announcemsghdr); 1663 ifan = (struct if_announcemsghdr *)rtm; 1664 (void)printf("if# %d, what: ", ifan->ifan_index); 1665 switch (ifan->ifan_what) { 1666 case IFAN_ARRIVAL: 1667 (void)printf("arrival"); 1668 break; 1669 case IFAN_DEPARTURE: 1670 printf("departure"); 1671 break; 1672 default: 1673 printf("#%d", ifan->ifan_what); 1674 break; 1675 } 1676 printf("\n"); 1677 fflush(stdout); 1678 break; 1679 1680 default: 1681 printf("pid: %ld, seq %d, errno %d, flags:", 1682 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1683 printb(rtm->rtm_flags, routeflags); 1684 pmsg_common(rtm, msglen); 1685 } 1686 1687 return; 1688 1689 badlen: 1690 (void)printf(errfmt, __func__, msglen); 1691 #undef REQUIRE 1692 } 1693 1694 static void 1695 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1696 { 1697 struct sockaddr *sp[RTAX_MAX]; 1698 struct timespec ts; 1699 char *cp; 1700 int i; 1701 1702 memset(sp, 0, sizeof(sp)); 1703 (void)printf(" route to: %s\n", 1704 routename((struct sockaddr *)&so[RTAX_DST])); 1705 if (rtm->rtm_version != RTM_VERSION) { 1706 warnx("routing message version %d not understood", 1707 rtm->rtm_version); 1708 return; 1709 } 1710 if (rtm->rtm_msglen > msglen) { 1711 warnx("message length mismatch, in packet %d, returned %d", 1712 rtm->rtm_msglen, msglen); 1713 return; 1714 } 1715 if (rtm->rtm_errno) { 1716 errno = rtm->rtm_errno; 1717 warn("message indicates error %d", errno); 1718 return; 1719 } 1720 cp = ((char *)(rtm + 1)); 1721 for (i = 0; i < RTAX_MAX; i++) 1722 if (rtm->rtm_addrs & (1 << i)) { 1723 sp[i] = (struct sockaddr *)cp; 1724 cp += SA_SIZE((struct sockaddr *)cp); 1725 } 1726 if ((rtm->rtm_addrs & RTA_IFP) && 1727 (sp[RTAX_IFP]->sa_family != AF_LINK || 1728 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1729 sp[RTAX_IFP] = NULL; 1730 if (sp[RTAX_DST] && sp[RTAX_NETMASK]) 1731 sp[RTAX_NETMASK]->sa_family = sp[RTAX_DST]->sa_family; /* XXX */ 1732 if (sp[RTAX_DST]) 1733 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1734 if (sp[RTAX_NETMASK]) 1735 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1736 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1737 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1738 if (fib >= 0) 1739 (void)printf(" fib: %u\n", (unsigned int)fib); 1740 if (sp[RTAX_IFP]) 1741 (void)printf(" interface: %.*s\n", 1742 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1743 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1744 (void)printf(" flags: "); 1745 printb(rtm->rtm_flags, routeflags); 1746 1747 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1748 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1749 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1750 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1751 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1752 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1753 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1754 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1755 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1756 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1757 if (rtm->rtm_rmx.rmx_expire > 0) 1758 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1759 else 1760 ts.tv_sec = 0; 1761 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1762 lock(EXPIRE)); 1763 #undef lock 1764 #undef msec 1765 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1766 if (verbose) 1767 pmsg_common(rtm, msglen); 1768 else if (rtm->rtm_addrs &~ RTA_IGN) { 1769 (void)printf("sockaddrs: "); 1770 printb(rtm->rtm_addrs, addrnames); 1771 putchar('\n'); 1772 } 1773 #undef RTA_IGN 1774 } 1775 1776 static void 1777 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1778 { 1779 1780 (void)printf("\nlocks: "); 1781 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1782 (void)printf(" inits: "); 1783 printb(rtm->rtm_inits, metricnames); 1784 if (msglen > sizeof(struct rt_msghdr)) 1785 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1786 msglen - sizeof(struct rt_msghdr)); 1787 else 1788 (void)fflush(stdout); 1789 } 1790 1791 static void 1792 pmsg_addrs(char *cp, int addrs, size_t len) 1793 { 1794 struct sockaddr *sa; 1795 int i; 1796 1797 if (addrs == 0) { 1798 (void)putchar('\n'); 1799 return; 1800 } 1801 (void)printf("\nsockaddrs: "); 1802 printb(addrs, addrnames); 1803 putchar('\n'); 1804 for (i = 0; i < RTAX_MAX; i++) 1805 if (addrs & (1 << i)) { 1806 sa = (struct sockaddr *)cp; 1807 if (len == 0 || len < SA_SIZE(sa)) { 1808 (void)printf(errfmt, __func__, len); 1809 break; 1810 } 1811 (void)printf(" %s", routename(sa)); 1812 len -= SA_SIZE(sa); 1813 cp += SA_SIZE(sa); 1814 } 1815 (void)putchar('\n'); 1816 (void)fflush(stdout); 1817 } 1818 1819 static void 1820 printb(int b, const char *str) 1821 { 1822 int i; 1823 int gotsome = 0; 1824 1825 if (b == 0) 1826 return; 1827 while ((i = *str++) != 0) { 1828 if (b & (1 << (i-1))) { 1829 if (gotsome == 0) 1830 i = '<'; 1831 else 1832 i = ','; 1833 putchar(i); 1834 gotsome = 1; 1835 for (; (i = *str) > 32; str++) 1836 putchar(i); 1837 } else 1838 while (*str > 32) 1839 str++; 1840 } 1841 if (gotsome) 1842 putchar('>'); 1843 } 1844 1845 int 1846 keyword(const char *cp) 1847 { 1848 const struct keytab *kt = keywords; 1849 1850 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1851 kt++; 1852 return (kt->kt_i); 1853 } 1854 1855 static void 1856 sodump(struct sockaddr *sa, const char *which) 1857 { 1858 #ifdef INET6 1859 char nbuf[INET6_ADDRSTRLEN]; 1860 #endif 1861 1862 switch (sa->sa_family) { 1863 case AF_LINK: 1864 (void)printf("%s: link %s; ", which, 1865 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1866 break; 1867 #ifdef INET 1868 case AF_INET: 1869 (void)printf("%s: inet %s; ", which, 1870 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1871 break; 1872 #endif 1873 #ifdef INET6 1874 case AF_INET6: 1875 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1876 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1877 sizeof(nbuf))); 1878 break; 1879 #endif 1880 } 1881 (void)fflush(stdout); 1882 } 1883 1884 /* States*/ 1885 #define VIRGIN 0 1886 #define GOTONE 1 1887 #define GOTTWO 2 1888 /* Inputs */ 1889 #define DIGIT (4*0) 1890 #define END (4*1) 1891 #define DELIM (4*2) 1892 1893 static void 1894 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1895 { 1896 char *cp = (char *)sa; 1897 char *cplim = cp + size; 1898 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1899 1900 memset(cp, 0, size); 1901 cp++; 1902 do { 1903 if ((*addr >= '0') && (*addr <= '9')) { 1904 new = *addr - '0'; 1905 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1906 new = *addr - 'a' + 10; 1907 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1908 new = *addr - 'A' + 10; 1909 } else if (*addr == '\0') 1910 state |= END; 1911 else 1912 state |= DELIM; 1913 addr++; 1914 switch (state /* | INPUT */) { 1915 case GOTTWO | DIGIT: 1916 *cp++ = byte; /*FALLTHROUGH*/ 1917 case VIRGIN | DIGIT: 1918 state = GOTONE; byte = new; continue; 1919 case GOTONE | DIGIT: 1920 state = GOTTWO; byte = new + (byte << 4); continue; 1921 default: /* | DELIM */ 1922 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1923 case GOTONE | END: 1924 case GOTTWO | END: 1925 *cp++ = byte; /* FALLTHROUGH */ 1926 case VIRGIN | END: 1927 break; 1928 } 1929 break; 1930 } while (cp < cplim); 1931 sa->sa_len = cp - (char *)sa; 1932 } 1933