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 <netatalk/at.h> 59 #include <arpa/inet.h> 60 #include <netdb.h> 61 62 #include <ctype.h> 63 #include <err.h> 64 #include <errno.h> 65 #include <paths.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <sysexits.h> 70 #include <unistd.h> 71 #include <ifaddrs.h> 72 73 static struct keytab { 74 const char *kt_cp; 75 int kt_i; 76 } keywords[] = { 77 #include "keywords.h" 78 {0, 0} 79 }; 80 81 static struct sockaddr_storage so[RTAX_MAX]; 82 static int pid, rtm_addrs; 83 static int s; 84 static int forcehost, forcenet, nflag, af, qflag, tflag; 85 static int verbose, aflen; 86 static int locking, lockrest, debugonly; 87 static struct rt_metrics rt_metrics; 88 static u_long rtm_inits; 89 static uid_t uid; 90 static int defaultfib; 91 static int numfibs; 92 93 static int atalk_aton(const char *, struct at_addr *); 94 static char *atalk_ntoa(struct at_addr); 95 static void printb(int, const char *); 96 static void flushroutes(int argc, char *argv[]); 97 static int flushroutes_fib(int); 98 static int getaddr(int, char *, struct hostent **, int); 99 static int keyword(const char *); 100 #ifdef INET 101 static void inet_makenetandmask(u_long, struct sockaddr_in *, 102 struct sockaddr_in *, u_long); 103 #endif 104 #ifdef INET6 105 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 106 #endif 107 static void interfaces(void); 108 static void monitor(int, char*[]); 109 static const char *netname(struct sockaddr *); 110 static void newroute(int, char **); 111 static int newroute_fib(int, char *, int); 112 static void pmsg_addrs(char *, int, size_t); 113 static void pmsg_common(struct rt_msghdr *, size_t); 114 static int prefixlen(const char *); 115 static void print_getmsg(struct rt_msghdr *, int, int); 116 static void print_rtmsg(struct rt_msghdr *, size_t); 117 static const char *routename(struct sockaddr *); 118 static int rtmsg(int, int, int); 119 static void set_metric(char *, int); 120 static int set_sofib(int); 121 static void sockaddr(char *, struct sockaddr *, size_t); 122 static void sodump(struct sockaddr *, const char *); 123 124 struct fibl { 125 TAILQ_ENTRY(fibl) fl_next; 126 127 int fl_num; 128 int fl_error; 129 int fl_errno; 130 }; 131 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 132 133 static int fiboptlist_csv(const char *, struct fibl_head_t *); 134 static int fiboptlist_range(const char *, struct fibl_head_t *); 135 136 static void usage(const char *) __dead2; 137 138 static void 139 usage(const char *cp) 140 { 141 if (cp != NULL) 142 warnx("bad keyword: %s", cp); 143 errx(EX_USAGE, "usage: route [-dnqtv] command [[modifiers] args]"); 144 /* NOTREACHED */ 145 } 146 147 int 148 main(int argc, char **argv) 149 { 150 int ch; 151 size_t len; 152 153 if (argc < 2) 154 usage(NULL); 155 156 while ((ch = getopt(argc, argv, "nqdtv")) != -1) 157 switch(ch) { 158 case 'n': 159 nflag = 1; 160 break; 161 case 'q': 162 qflag = 1; 163 break; 164 case 'v': 165 verbose = 1; 166 break; 167 case 't': 168 tflag = 1; 169 break; 170 case 'd': 171 debugonly = 1; 172 break; 173 case '?': 174 default: 175 usage(NULL); 176 } 177 argc -= optind; 178 argv += optind; 179 180 pid = getpid(); 181 uid = geteuid(); 182 if (tflag) 183 s = open(_PATH_DEVNULL, O_WRONLY, 0); 184 else 185 s = socket(PF_ROUTE, SOCK_RAW, 0); 186 if (s < 0) 187 err(EX_OSERR, "socket"); 188 189 len = sizeof(numfibs); 190 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 191 numfibs = -1; 192 193 len = sizeof(defaultfib); 194 if (numfibs != -1 && 195 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 196 0) == -1) 197 defaultfib = -1; 198 199 if (*argv != NULL) 200 switch (keyword(*argv)) { 201 case K_GET: 202 case K_SHOW: 203 uid = 0; 204 /* FALLTHROUGH */ 205 206 case K_CHANGE: 207 case K_ADD: 208 case K_DEL: 209 case K_DELETE: 210 newroute(argc, argv); 211 /* NOTREACHED */ 212 213 case K_MONITOR: 214 monitor(argc, argv); 215 /* NOTREACHED */ 216 217 case K_FLUSH: 218 flushroutes(argc, argv); 219 exit(0); 220 /* NOTREACHED */ 221 } 222 usage(*argv); 223 /* NOTREACHED */ 224 } 225 226 static int 227 set_sofib(int fib) 228 { 229 230 if (fib < 0) 231 return (0); 232 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 233 sizeof(fib))); 234 } 235 236 static int 237 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 238 { 239 struct fibl *fl; 240 char *str0, *str, *token, *endptr; 241 int fib[2], i, error; 242 243 str0 = str = strdup(arg); 244 error = 0; 245 i = 0; 246 while ((token = strsep(&str, "-")) != NULL) { 247 switch (i) { 248 case 0: 249 case 1: 250 errno = 0; 251 fib[i] = strtol(token, &endptr, 0); 252 if (errno == 0) { 253 if (*endptr != '\0' || 254 fib[i] < 0 || 255 (numfibs != -1 && fib[i] > numfibs - 1)) 256 errno = EINVAL; 257 } 258 if (errno) 259 error = 1; 260 break; 261 default: 262 error = 1; 263 } 264 if (error) 265 goto fiboptlist_range_ret; 266 i++; 267 } 268 if (fib[0] >= fib[1]) { 269 error = 1; 270 goto fiboptlist_range_ret; 271 } 272 for (i = fib[0]; i <= fib[1]; i++) { 273 fl = calloc(1, sizeof(*fl)); 274 if (fl == NULL) { 275 error = 1; 276 goto fiboptlist_range_ret; 277 } 278 fl->fl_num = i; 279 TAILQ_INSERT_TAIL(flh, fl, fl_next); 280 } 281 fiboptlist_range_ret: 282 free(str0); 283 return (error); 284 } 285 286 #define ALLSTRLEN 64 287 static int 288 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 289 { 290 struct fibl *fl; 291 char *str0, *str, *token, *endptr; 292 int fib, error; 293 294 str0 = str = NULL; 295 if (strcmp("all", arg) == 0) { 296 str = calloc(1, ALLSTRLEN); 297 if (str == NULL) { 298 error = 1; 299 goto fiboptlist_csv_ret; 300 } 301 if (numfibs > 1) 302 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 303 else 304 snprintf(str, ALLSTRLEN - 1, "%d", 0); 305 } else if (strcmp("default", arg) == 0) { 306 str0 = str = calloc(1, ALLSTRLEN); 307 if (str == NULL) { 308 error = 1; 309 goto fiboptlist_csv_ret; 310 } 311 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 312 } else 313 str0 = str = strdup(arg); 314 315 error = 0; 316 while ((token = strsep(&str, ",")) != NULL) { 317 if (*token != '-' && strchr(token, '-') != NULL) { 318 error = fiboptlist_range(token, flh); 319 if (error) 320 goto fiboptlist_csv_ret; 321 } else { 322 errno = 0; 323 fib = strtol(token, &endptr, 0); 324 if (errno == 0) { 325 if (*endptr != '\0' || 326 fib < 0 || 327 (numfibs != -1 && fib > numfibs - 1)) 328 errno = EINVAL; 329 } 330 if (errno) { 331 error = 1; 332 goto fiboptlist_csv_ret; 333 } 334 fl = calloc(1, sizeof(*fl)); 335 if (fl == NULL) { 336 error = 1; 337 goto fiboptlist_csv_ret; 338 } 339 fl->fl_num = fib; 340 TAILQ_INSERT_TAIL(flh, fl, fl_next); 341 } 342 } 343 fiboptlist_csv_ret: 344 if (str0 != NULL) 345 free(str0); 346 return (error); 347 } 348 349 /* 350 * Purge all entries in the routing tables not 351 * associated with network interfaces. 352 */ 353 static void 354 flushroutes(int argc, char *argv[]) 355 { 356 struct fibl *fl; 357 int error; 358 359 if (uid != 0 && !debugonly && !tflag) 360 errx(EX_NOPERM, "must be root to alter routing table"); 361 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 362 363 TAILQ_INIT(&fibl_head); 364 while (argc > 1) { 365 argc--; 366 argv++; 367 if (**argv != '-') 368 usage(*argv); 369 switch (keyword(*argv + 1)) { 370 #ifdef INET 371 case K_INET: 372 af = AF_INET; 373 break; 374 #endif 375 #ifdef INET6 376 case K_INET6: 377 af = AF_INET6; 378 break; 379 #endif 380 case K_ATALK: 381 af = AF_APPLETALK; 382 break; 383 case K_LINK: 384 af = AF_LINK; 385 break; 386 case K_FIB: 387 if (!--argc) 388 usage(*argv); 389 error = fiboptlist_csv(*++argv, &fibl_head); 390 if (error) 391 errx(EX_USAGE, "invalid fib number: %s", *argv); 392 break; 393 default: 394 usage(*argv); 395 } 396 } 397 if (TAILQ_EMPTY(&fibl_head)) { 398 error = fiboptlist_csv("default", &fibl_head); 399 if (error) 400 errx(EX_OSERR, "fiboptlist_csv failed."); 401 } 402 TAILQ_FOREACH(fl, &fibl_head, fl_next) 403 flushroutes_fib(fl->fl_num); 404 } 405 406 static int 407 flushroutes_fib(int fib) 408 { 409 struct rt_msghdr *rtm; 410 size_t needed; 411 char *buf, *next, *lim; 412 int mib[7], rlen, seqno, count = 0; 413 int error; 414 415 error = set_sofib(fib); 416 if (error) { 417 warn("fib number %d is ignored", fib); 418 return (error); 419 } 420 421 retry: 422 mib[0] = CTL_NET; 423 mib[1] = PF_ROUTE; 424 mib[2] = 0; /* protocol */ 425 mib[3] = AF_UNSPEC; 426 mib[4] = NET_RT_DUMP; 427 mib[5] = 0; /* no flags */ 428 mib[6] = fib; 429 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 430 err(EX_OSERR, "route-sysctl-estimate"); 431 if ((buf = malloc(needed)) == NULL) 432 errx(EX_OSERR, "malloc failed"); 433 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 434 if (errno == ENOMEM && count++ < 10) { 435 warnx("Routing table grew, retrying"); 436 sleep(1); 437 free(buf); 438 goto retry; 439 } 440 err(EX_OSERR, "route-sysctl-get"); 441 } 442 lim = buf + needed; 443 if (verbose) 444 (void)printf("Examining routing table from sysctl\n"); 445 seqno = 0; /* ??? */ 446 for (next = buf; next < lim; next += rtm->rtm_msglen) { 447 rtm = (struct rt_msghdr *)(void *)next; 448 if (verbose) 449 print_rtmsg(rtm, rtm->rtm_msglen); 450 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 451 continue; 452 if (af != 0) { 453 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 454 455 if (sa->sa_family != af) 456 continue; 457 } 458 if (debugonly) 459 continue; 460 rtm->rtm_type = RTM_DELETE; 461 rtm->rtm_seq = seqno; 462 rlen = write(s, next, rtm->rtm_msglen); 463 if (rlen < 0 && errno == EPERM) 464 err(1, "write to routing socket"); 465 if (rlen < (int)rtm->rtm_msglen) { 466 warn("write to routing socket"); 467 (void)printf("got only %d for rlen\n", rlen); 468 free(buf); 469 goto retry; 470 break; 471 } 472 seqno++; 473 if (qflag) 474 continue; 475 if (verbose) 476 print_rtmsg(rtm, rlen); 477 else { 478 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 479 480 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 481 routename(sa) : netname(sa)); 482 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 483 printf("%-20.20s ", routename(sa)); 484 if (fib >= 0) 485 printf("-fib %-3d ", fib); 486 printf("done\n"); 487 } 488 } 489 return (error); 490 } 491 492 static const char * 493 routename(struct sockaddr *sa) 494 { 495 struct sockaddr_dl *sdl; 496 const char *cp; 497 static char line[NI_MAXHOST]; 498 static char domain[MAXHOSTNAMELEN + 1]; 499 static int first = 1, n; 500 501 if (first) { 502 first = 0; 503 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 504 (cp = strchr(domain, '.'))) { 505 domain[MAXHOSTNAMELEN] = '\0'; 506 (void)strcpy(domain, cp + 1); 507 } else 508 domain[0] = '\0'; 509 } 510 511 /* If the address is zero-filled, use "default". */ 512 if (sa->sa_len == 0 && nflag == 0) 513 return ("default"); 514 #if defined(INET) || defined(INET6) 515 switch (sa->sa_family) { 516 #ifdef INET 517 case AF_INET: 518 /* If the address is zero-filled, use "default". */ 519 if (nflag == 0 && 520 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 521 INADDR_ANY) 522 return("default"); 523 break; 524 #endif 525 #ifdef INET6 526 case AF_INET6: 527 /* If the address is zero-filled, use "default". */ 528 if (nflag == 0 && 529 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 530 return("default"); 531 break; 532 #endif 533 } 534 #endif 535 536 switch (sa->sa_family) { 537 #if defined(INET) || defined(INET6) 538 #ifdef INET 539 case AF_INET: 540 #endif 541 #ifdef INET6 542 case AF_INET6: 543 #endif 544 { 545 struct sockaddr_storage ss; 546 int error; 547 char *p; 548 549 memset(&ss, 0, sizeof(ss)); 550 if (sa->sa_len == 0) 551 ss.ss_family = sa->sa_family; 552 else 553 memcpy(&ss, sa, sa->sa_len); 554 /* Expand sa->sa_len because it could be shortened. */ 555 if (sa->sa_family == AF_INET) 556 ss.ss_len = sizeof(struct sockaddr_in); 557 else if (sa->sa_family == AF_INET6) 558 ss.ss_len = sizeof(struct sockaddr_in6); 559 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 560 line, sizeof(line), NULL, 0, 561 (nflag == 0) ? 0 : NI_NUMERICHOST); 562 if (error) { 563 warnx("getnameinfo(): %s", gai_strerror(error)); 564 strncpy(line, "invalid", sizeof(line)); 565 } 566 567 /* Remove the domain part if any. */ 568 p = strchr(line, '.'); 569 if (p != NULL && strcmp(p + 1, domain) == 0) 570 *p = '\0'; 571 572 return (line); 573 break; 574 } 575 #endif 576 case AF_APPLETALK: 577 (void)snprintf(line, sizeof(line), "atalk %s", 578 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 579 break; 580 581 case AF_LINK: 582 sdl = (struct sockaddr_dl *)(void *)sa; 583 584 if (sdl->sdl_nlen == 0 && 585 sdl->sdl_alen == 0 && 586 sdl->sdl_slen == 0) { 587 n = snprintf(line, sizeof(line), "link#%d", 588 sdl->sdl_index); 589 if (n > (int)sizeof(line)) 590 line[0] = '\0'; 591 return (line); 592 } else 593 return (link_ntoa(sdl)); 594 break; 595 596 default: 597 { 598 u_short *sp = (u_short *)(void *)sa; 599 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 600 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 601 char *cpe = line + sizeof(line); 602 603 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 604 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 605 cps += n; 606 else 607 *cps = '\0'; 608 break; 609 } 610 } 611 return (line); 612 } 613 614 /* 615 * Return the name of the network whose address is given. 616 * The address is assumed to be that of a net, not a host. 617 */ 618 static const char * 619 netname(struct sockaddr *sa) 620 { 621 struct sockaddr_dl *sdl; 622 static char line[MAXHOSTNAMELEN + 1]; 623 int n; 624 #ifdef INET 625 struct netent *np = NULL; 626 const char *cp = NULL; 627 u_long i; 628 #endif 629 630 switch (sa->sa_family) { 631 #ifdef INET 632 case AF_INET: 633 { 634 struct in_addr in; 635 636 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 637 i = in.s_addr = ntohl(in.s_addr); 638 if (in.s_addr == 0) 639 cp = "default"; 640 else if (!nflag) { 641 np = getnetbyaddr(i, AF_INET); 642 if (np != NULL) 643 cp = np->n_name; 644 } 645 #define C(x) (unsigned)((x) & 0xff) 646 if (cp != NULL) 647 strncpy(line, cp, sizeof(line)); 648 else if ((in.s_addr & 0xffffff) == 0) 649 (void)sprintf(line, "%u", C(in.s_addr >> 24)); 650 else if ((in.s_addr & 0xffff) == 0) 651 (void)sprintf(line, "%u.%u", C(in.s_addr >> 24), 652 C(in.s_addr >> 16)); 653 else if ((in.s_addr & 0xff) == 0) 654 (void)sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 655 C(in.s_addr >> 16), C(in.s_addr >> 8)); 656 else 657 (void)sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 658 C(in.s_addr >> 16), C(in.s_addr >> 8), 659 C(in.s_addr)); 660 #undef C 661 break; 662 } 663 #endif 664 #ifdef INET6 665 case AF_INET6: 666 { 667 struct sockaddr_in6 sin6; 668 int niflags = 0; 669 670 memset(&sin6, 0, sizeof(sin6)); 671 memcpy(&sin6, sa, sa->sa_len); 672 sin6.sin6_len = sizeof(sin6); 673 sin6.sin6_family = AF_INET6; 674 if (nflag) 675 niflags |= NI_NUMERICHOST; 676 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 677 line, sizeof(line), NULL, 0, niflags) != 0) 678 strncpy(line, "invalid", sizeof(line)); 679 680 return(line); 681 } 682 #endif 683 684 case AF_APPLETALK: 685 (void)snprintf(line, sizeof(line), "atalk %s", 686 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 687 break; 688 689 case AF_LINK: 690 sdl = (struct sockaddr_dl *)(void *)sa; 691 692 if (sdl->sdl_nlen == 0 && 693 sdl->sdl_alen == 0 && 694 sdl->sdl_slen == 0) { 695 n = snprintf(line, sizeof(line), "link#%d", 696 sdl->sdl_index); 697 if (n > (int)sizeof(line)) 698 line[0] = '\0'; 699 return (line); 700 } else 701 return (link_ntoa(sdl)); 702 break; 703 704 default: 705 { 706 u_short *sp = (u_short *)(void *)sa->sa_data; 707 u_short *splim = sp + ((sa->sa_len + 1)>>1); 708 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 709 char *cpe = line + sizeof(line); 710 711 while (sp < splim && cps < cpe) 712 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 713 cps += n; 714 else 715 *cps = '\0'; 716 break; 717 } 718 } 719 return (line); 720 } 721 722 static void 723 set_metric(char *value, int key) 724 { 725 int flag = 0; 726 u_long noval, *valp = &noval; 727 728 switch (key) { 729 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 730 caseof(K_MTU, RTV_MTU, rmx_mtu); 731 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 732 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 733 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 734 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 735 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 736 caseof(K_RTT, RTV_RTT, rmx_rtt); 737 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 738 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 739 } 740 rtm_inits |= flag; 741 if (lockrest || locking) 742 rt_metrics.rmx_locks |= flag; 743 if (locking) 744 locking = 0; 745 *valp = atoi(value); 746 } 747 748 #define F_ISHOST 0x01 749 #define F_FORCENET 0x02 750 #define F_FORCEHOST 0x04 751 #define F_PROXY 0x08 752 #define F_INTERFACE 0x10 753 754 static void 755 newroute(int argc, char **argv) 756 { 757 struct hostent *hp; 758 struct fibl *fl; 759 char *cmd; 760 const char *dest, *gateway, *errmsg; 761 int key, error, flags, nrflags, fibnum; 762 763 if (uid != 0 && !debugonly && !tflag) 764 errx(EX_NOPERM, "must be root to alter routing table"); 765 dest = NULL; 766 gateway = NULL; 767 flags = RTF_STATIC; 768 nrflags = 0; 769 hp = NULL; 770 TAILQ_INIT(&fibl_head); 771 772 cmd = argv[0]; 773 if (*cmd != 'g' && *cmd != 's') 774 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 775 while (--argc > 0) { 776 if (**(++argv)== '-') { 777 switch (key = keyword(1 + *argv)) { 778 case K_LINK: 779 af = AF_LINK; 780 aflen = sizeof(struct sockaddr_dl); 781 break; 782 #ifdef INET 783 case K_INET: 784 af = AF_INET; 785 aflen = sizeof(struct sockaddr_in); 786 break; 787 #endif 788 #ifdef INET6 789 case K_INET6: 790 af = AF_INET6; 791 aflen = sizeof(struct sockaddr_in6); 792 break; 793 #endif 794 case K_ATALK: 795 af = AF_APPLETALK; 796 aflen = sizeof(struct sockaddr_at); 797 break; 798 case K_SA: 799 af = PF_ROUTE; 800 aflen = sizeof(struct sockaddr_storage); 801 break; 802 case K_IFACE: 803 case K_INTERFACE: 804 nrflags |= F_INTERFACE; 805 break; 806 case K_NOSTATIC: 807 flags &= ~RTF_STATIC; 808 break; 809 case K_LOCK: 810 locking = 1; 811 break; 812 case K_LOCKREST: 813 lockrest = 1; 814 break; 815 case K_HOST: 816 nrflags |= F_FORCEHOST; 817 break; 818 case K_REJECT: 819 flags |= RTF_REJECT; 820 break; 821 case K_BLACKHOLE: 822 flags |= RTF_BLACKHOLE; 823 break; 824 case K_PROTO1: 825 flags |= RTF_PROTO1; 826 break; 827 case K_PROTO2: 828 flags |= RTF_PROTO2; 829 break; 830 case K_PROXY: 831 nrflags |= F_PROXY; 832 break; 833 case K_XRESOLVE: 834 flags |= RTF_XRESOLVE; 835 break; 836 case K_STATIC: 837 flags |= RTF_STATIC; 838 break; 839 case K_STICKY: 840 flags |= RTF_STICKY; 841 break; 842 case K_NOSTICK: 843 flags &= ~RTF_STICKY; 844 break; 845 case K_FIB: 846 if (!--argc) 847 usage(NULL); 848 error = fiboptlist_csv(*++argv, &fibl_head); 849 if (error) 850 errx(EX_USAGE, 851 "invalid fib number: %s", *argv); 852 break; 853 case K_IFA: 854 if (!--argc) 855 usage(NULL); 856 getaddr(RTAX_IFA, *++argv, 0, nrflags); 857 break; 858 case K_IFP: 859 if (!--argc) 860 usage(NULL); 861 getaddr(RTAX_IFP, *++argv, 0, nrflags); 862 break; 863 case K_GENMASK: 864 if (!--argc) 865 usage(NULL); 866 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 867 break; 868 case K_GATEWAY: 869 if (!--argc) 870 usage(NULL); 871 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 872 gateway = *argv; 873 break; 874 case K_DST: 875 if (!--argc) 876 usage(NULL); 877 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 878 nrflags |= F_ISHOST; 879 dest = *argv; 880 break; 881 case K_NETMASK: 882 if (!--argc) 883 usage(NULL); 884 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 885 /* FALLTHROUGH */ 886 case K_NET: 887 nrflags |= F_FORCENET; 888 break; 889 case K_PREFIXLEN: 890 if (!--argc) 891 usage(NULL); 892 if (prefixlen(*++argv) == -1) { 893 nrflags &= ~F_FORCENET; 894 nrflags |= F_ISHOST; 895 } else { 896 nrflags |= F_FORCENET; 897 nrflags &= ~F_ISHOST; 898 } 899 break; 900 case K_MTU: 901 case K_HOPCOUNT: 902 case K_EXPIRE: 903 case K_RECVPIPE: 904 case K_SENDPIPE: 905 case K_SSTHRESH: 906 case K_RTT: 907 case K_RTTVAR: 908 case K_WEIGHT: 909 if (!--argc) 910 usage(NULL); 911 set_metric(*++argv, key); 912 break; 913 default: 914 usage(1+*argv); 915 } 916 } else { 917 if ((rtm_addrs & RTA_DST) == 0) { 918 dest = *argv; 919 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 920 nrflags |= F_ISHOST; 921 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 922 gateway = *argv; 923 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 924 } else { 925 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 926 nrflags |= F_FORCENET; 927 } 928 } 929 } 930 931 if (so[RTAX_DST].ss_len == 0) { 932 warnx("destination parameter required"); 933 usage(NULL); 934 } 935 936 if (nrflags & F_FORCEHOST) { 937 nrflags |= F_ISHOST; 938 #ifdef INET6 939 if (af == AF_INET6) { 940 rtm_addrs &= ~RTA_NETMASK; 941 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 942 } 943 #endif 944 } 945 if (nrflags & F_FORCENET) 946 nrflags &= ~F_ISHOST; 947 flags |= RTF_UP; 948 if (nrflags & F_ISHOST) 949 flags |= RTF_HOST; 950 if ((nrflags & F_INTERFACE) == 0) 951 flags |= RTF_GATEWAY; 952 if (nrflags & F_PROXY) 953 flags |= RTF_ANNOUNCE; 954 if (dest == NULL) 955 dest = ""; 956 if (gateway == NULL) 957 gateway = ""; 958 959 if (TAILQ_EMPTY(&fibl_head)) { 960 error = fiboptlist_csv("default", &fibl_head); 961 if (error) 962 errx(EX_OSERR, "fiboptlist_csv failed."); 963 } 964 error = 0; 965 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 966 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 967 if (fl->fl_error) 968 fl->fl_errno = errno; 969 error += fl->fl_error; 970 } 971 if (*cmd == 'g' || *cmd == 's') 972 exit(error); 973 974 error = 0; 975 if (!qflag) { 976 fibnum = 0; 977 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 978 if (fl->fl_error == 0) 979 fibnum++; 980 } 981 if (fibnum > 0) { 982 int firstfib = 1; 983 984 printf("%s %s %s", cmd, 985 (nrflags & F_ISHOST) ? "host" : "net", dest); 986 if (*gateway) 987 printf(": gateway %s", gateway); 988 989 if (numfibs > 1) { 990 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 991 if (fl->fl_error == 0 992 && fl->fl_num >= 0) { 993 if (firstfib) { 994 printf(" fib "); 995 firstfib = 0; 996 } 997 printf("%d", fl->fl_num); 998 if (fibnum-- > 1) 999 printf(","); 1000 } 1001 } 1002 } 1003 printf("\n"); 1004 } 1005 1006 fibnum = 0; 1007 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1008 if (fl->fl_error != 0) { 1009 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1010 ? "host" : "net", dest); 1011 if (*gateway) 1012 printf(": gateway %s", gateway); 1013 1014 if (fl->fl_num >= 0) 1015 printf(" fib %d", fl->fl_num); 1016 1017 switch (fl->fl_errno) { 1018 case ESRCH: 1019 errmsg = "not in table"; 1020 break; 1021 case EBUSY: 1022 errmsg = "entry in use"; 1023 break; 1024 case ENOBUFS: 1025 errmsg = "not enough memory"; 1026 break; 1027 case EADDRINUSE: 1028 /* 1029 * handle recursion avoidance 1030 * in rt_setgate() 1031 */ 1032 errmsg = "gateway uses the same route"; 1033 break; 1034 case EEXIST: 1035 errmsg = "route already in table"; 1036 break; 1037 default: 1038 errmsg = strerror(fl->fl_errno); 1039 break; 1040 } 1041 printf(": %s\n", errmsg); 1042 error = 1; 1043 } 1044 } 1045 } 1046 exit(error); 1047 } 1048 1049 static int 1050 newroute_fib(int fib, char *cmd, int flags) 1051 { 1052 int error; 1053 1054 error = set_sofib(fib); 1055 if (error) { 1056 warn("fib number %d is ignored", fib); 1057 return (error); 1058 } 1059 1060 error = rtmsg(*cmd, flags, fib); 1061 return (error); 1062 } 1063 1064 #ifdef INET 1065 static void 1066 inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1067 struct sockaddr_in *sin_mask, u_long bits) 1068 { 1069 u_long mask = 0; 1070 1071 rtm_addrs |= RTA_NETMASK; 1072 1073 /* 1074 * MSB of net should be meaningful. 0/0 is exception. 1075 */ 1076 if (net > 0) 1077 while ((net & 0xff000000) == 0) 1078 net <<= 8; 1079 1080 /* 1081 * If no /xx was specified we must calculate the 1082 * CIDR address. 1083 */ 1084 if ((bits == 0) && (net != 0)) { 1085 u_long i, j; 1086 1087 for(i = 0, j = 0xff; i < 4; i++) { 1088 if (net & j) { 1089 break; 1090 } 1091 j <<= 8; 1092 } 1093 /* i holds the first non zero bit */ 1094 bits = 32 - (i*8); 1095 } 1096 if (bits != 0) 1097 mask = 0xffffffff << (32 - bits); 1098 1099 sin->sin_addr.s_addr = htonl(net); 1100 sin_mask->sin_addr.s_addr = htonl(mask); 1101 sin_mask->sin_len = sizeof(struct sockaddr_in); 1102 sin_mask->sin_family = AF_INET; 1103 } 1104 #endif 1105 1106 #ifdef INET6 1107 /* 1108 * XXX the function may need more improvement... 1109 */ 1110 static int 1111 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1112 { 1113 struct in6_addr in6; 1114 1115 if (plen == NULL) { 1116 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1117 sin6->sin6_scope_id == 0) { 1118 plen = "0"; 1119 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1120 /* aggregatable global unicast - RFC2374 */ 1121 memset(&in6, 0, sizeof(in6)); 1122 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1123 &in6.s6_addr[8], 8)) 1124 plen = "64"; 1125 } 1126 } 1127 1128 if (plen == NULL || strcmp(plen, "128") == 0) 1129 return (1); 1130 rtm_addrs |= RTA_NETMASK; 1131 prefixlen(plen); 1132 return (0); 1133 } 1134 #endif 1135 1136 /* 1137 * Interpret an argument as a network address of some kind, 1138 * returning 1 if a host address, 0 if a network address. 1139 */ 1140 static int 1141 getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1142 { 1143 struct sockaddr *sa; 1144 #if defined(INET) 1145 struct sockaddr_in *sin; 1146 struct hostent *hp; 1147 struct netent *np; 1148 u_long val; 1149 char *q; 1150 #elif defined(INET6) 1151 char *q; 1152 #endif 1153 1154 if (idx < 0 || idx >= RTAX_MAX) 1155 usage("internal error"); 1156 if (af == 0) { 1157 #if defined(INET) 1158 af = AF_INET; 1159 aflen = sizeof(struct sockaddr_in); 1160 #elif defined(INET6) 1161 af = AF_INET6; 1162 aflen = sizeof(struct sockaddr_in6); 1163 #else 1164 af = AF_LINK; 1165 aflen = sizeof(struct sockaddr_dl); 1166 #endif 1167 } 1168 #ifndef INET 1169 hpp = NULL; 1170 #endif 1171 rtm_addrs |= (1 << idx); 1172 sa = (struct sockaddr *)&so[idx]; 1173 sa->sa_family = af; 1174 sa->sa_len = aflen; 1175 1176 switch (idx) { 1177 case RTAX_GATEWAY: 1178 if (nrflags & F_INTERFACE) { 1179 struct ifaddrs *ifap, *ifa; 1180 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1181 struct sockaddr_dl *sdl = NULL; 1182 1183 if (getifaddrs(&ifap)) 1184 err(EX_OSERR, "getifaddrs"); 1185 1186 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1187 if (ifa->ifa_addr->sa_family != AF_LINK) 1188 continue; 1189 1190 if (strcmp(str, ifa->ifa_name) != 0) 1191 continue; 1192 1193 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1194 } 1195 /* If we found it, then use it */ 1196 if (sdl != NULL) { 1197 /* 1198 * Note that we need to copy before calling 1199 * freeifaddrs(). 1200 */ 1201 memcpy(sdl0, sdl, sdl->sdl_len); 1202 } 1203 freeifaddrs(ifap); 1204 if (sdl != NULL) 1205 return(1); 1206 } 1207 break; 1208 case RTAX_IFP: 1209 sa->sa_family = AF_LINK; 1210 break; 1211 } 1212 if (strcmp(str, "default") == 0) { 1213 /* 1214 * Default is net 0.0.0.0/0 1215 */ 1216 switch (idx) { 1217 case RTAX_DST: 1218 forcenet++; 1219 getaddr(RTAX_NETMASK, str, 0, nrflags); 1220 break; 1221 } 1222 return (0); 1223 } 1224 switch (sa->sa_family) { 1225 #ifdef INET6 1226 case AF_INET6: 1227 { 1228 struct addrinfo hints, *res; 1229 int ecode; 1230 1231 q = NULL; 1232 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1233 *q = '\0'; 1234 memset(&hints, 0, sizeof(hints)); 1235 hints.ai_family = sa->sa_family; 1236 hints.ai_socktype = SOCK_DGRAM; 1237 ecode = getaddrinfo(str, NULL, &hints, &res); 1238 if (ecode != 0 || res->ai_family != AF_INET6 || 1239 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1240 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1241 memcpy(sa, res->ai_addr, res->ai_addrlen); 1242 freeaddrinfo(res); 1243 if (q != NULL) 1244 *q++ = '/'; 1245 if (idx == RTAX_DST) 1246 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1247 return (0); 1248 } 1249 #endif /* INET6 */ 1250 1251 case AF_APPLETALK: 1252 { 1253 struct sockaddr_at *sat = (struct sockaddr_at *)(void *)sa; 1254 1255 if (!atalk_aton(str, &sat->sat_addr)) 1256 errx(EX_NOHOST, "bad address: %s", str); 1257 rtm_addrs |= RTA_NETMASK; 1258 return(forcehost || sat->sat_addr.s_node != 0); 1259 } 1260 case AF_LINK: 1261 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1262 return (1); 1263 1264 case PF_ROUTE: 1265 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1266 return (1); 1267 #ifdef INET 1268 case AF_INET: 1269 #endif 1270 default: 1271 break; 1272 } 1273 1274 #ifdef INET 1275 sin = (struct sockaddr_in *)(void *)sa; 1276 if (hpp == NULL) 1277 hpp = &hp; 1278 *hpp = NULL; 1279 1280 q = strchr(str,'/'); 1281 if (q != NULL && idx == RTAX_DST) { 1282 *q = '\0'; 1283 if ((val = inet_network(str)) != INADDR_NONE) { 1284 inet_makenetandmask(val, sin, 1285 (struct sockaddr_in *)&so[RTAX_NETMASK], 1286 strtoul(q+1, 0, 0)); 1287 return (0); 1288 } 1289 *q = '/'; 1290 } 1291 if ((idx != RTAX_DST || forcenet == 0) && 1292 inet_aton(str, &sin->sin_addr)) { 1293 val = sin->sin_addr.s_addr; 1294 if (idx != RTAX_DST || forcehost || 1295 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1296 return (1); 1297 else { 1298 val = ntohl(val); 1299 goto netdone; 1300 } 1301 } 1302 if (idx == RTAX_DST && forcehost == 0 && 1303 ((val = inet_network(str)) != INADDR_NONE || 1304 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1305 netdone: 1306 inet_makenetandmask(val, sin, 1307 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1308 return (0); 1309 } 1310 hp = gethostbyname(str); 1311 if (hp != NULL) { 1312 *hpp = hp; 1313 sin->sin_family = hp->h_addrtype; 1314 memmove((char *)&sin->sin_addr, hp->h_addr, 1315 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1316 return (1); 1317 } 1318 #endif 1319 errx(EX_NOHOST, "bad address: %s", str); 1320 } 1321 1322 static int 1323 prefixlen(const char *str) 1324 { 1325 int len = atoi(str), q, r; 1326 int max; 1327 char *p; 1328 1329 rtm_addrs |= RTA_NETMASK; 1330 switch (af) { 1331 #ifdef INET6 1332 case AF_INET6: 1333 { 1334 struct sockaddr_in6 *sin6 = 1335 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1336 1337 max = 128; 1338 p = (char *)&sin6->sin6_addr; 1339 sin6->sin6_family = AF_INET6; 1340 sin6->sin6_len = sizeof(*sin6); 1341 break; 1342 } 1343 #endif 1344 #ifdef INET 1345 case AF_INET: 1346 { 1347 struct sockaddr_in *sin = 1348 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1349 1350 max = 32; 1351 p = (char *)&sin->sin_addr; 1352 sin->sin_family = AF_INET; 1353 sin->sin_len = sizeof(*sin); 1354 break; 1355 } 1356 #endif 1357 default: 1358 errx(EX_OSERR, "prefixlen not supported in this af"); 1359 } 1360 1361 if (len < 0 || max < len) 1362 errx(EX_USAGE, "%s: invalid prefixlen", str); 1363 1364 q = len >> 3; 1365 r = len & 7; 1366 memset((void *)p, 0, max / 8); 1367 if (q > 0) 1368 memset((void *)p, 0xff, q); 1369 if (r > 0) 1370 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1371 if (len == max) 1372 return (-1); 1373 else 1374 return (len); 1375 } 1376 1377 static void 1378 interfaces(void) 1379 { 1380 size_t needed; 1381 int mib[6]; 1382 char *buf, *lim, *next, count = 0; 1383 struct rt_msghdr *rtm; 1384 1385 retry2: 1386 mib[0] = CTL_NET; 1387 mib[1] = PF_ROUTE; 1388 mib[2] = 0; /* protocol */ 1389 mib[3] = AF_UNSPEC; 1390 mib[4] = NET_RT_IFLIST; 1391 mib[5] = 0; /* no flags */ 1392 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1393 err(EX_OSERR, "route-sysctl-estimate"); 1394 if ((buf = malloc(needed)) == NULL) 1395 errx(EX_OSERR, "malloc failed"); 1396 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1397 if (errno == ENOMEM && count++ < 10) { 1398 warnx("Routing table grew, retrying"); 1399 sleep(1); 1400 free(buf); 1401 goto retry2; 1402 } 1403 err(EX_OSERR, "actual retrieval of interface table"); 1404 } 1405 lim = buf + needed; 1406 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1407 rtm = (struct rt_msghdr *)(void *)next; 1408 print_rtmsg(rtm, rtm->rtm_msglen); 1409 } 1410 } 1411 1412 static void 1413 monitor(int argc, char *argv[]) 1414 { 1415 int n, fib, error; 1416 char msg[2048], *endptr; 1417 1418 fib = defaultfib; 1419 while (argc > 1) { 1420 argc--; 1421 argv++; 1422 if (**argv != '-') 1423 usage(*argv); 1424 switch (keyword(*argv + 1)) { 1425 case K_FIB: 1426 if (!--argc) 1427 usage(*argv); 1428 errno = 0; 1429 fib = strtol(*++argv, &endptr, 0); 1430 if (errno == 0) { 1431 if (*endptr != '\0' || 1432 fib < 0 || 1433 (numfibs != -1 && fib > numfibs - 1)) 1434 errno = EINVAL; 1435 } 1436 if (errno) 1437 errx(EX_USAGE, "invalid fib number: %s", *argv); 1438 break; 1439 default: 1440 usage(*argv); 1441 } 1442 } 1443 error = set_sofib(fib); 1444 if (error) 1445 errx(EX_USAGE, "invalid fib number: %d", fib); 1446 1447 verbose = 1; 1448 if (debugonly) { 1449 interfaces(); 1450 exit(0); 1451 } 1452 for (;;) { 1453 time_t now; 1454 n = read(s, msg, 2048); 1455 now = time(NULL); 1456 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1457 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1458 } 1459 } 1460 1461 static struct { 1462 struct rt_msghdr m_rtm; 1463 char m_space[512]; 1464 } m_rtmsg; 1465 1466 static int 1467 rtmsg(int cmd, int flags, int fib) 1468 { 1469 static int seq; 1470 int rlen; 1471 char *cp = m_rtmsg.m_space; 1472 int l; 1473 1474 #define NEXTADDR(w, u) \ 1475 if (rtm_addrs & (w)) { \ 1476 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1477 sizeof(long) : \ 1478 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1479 | (sizeof(long) - 1)); \ 1480 memmove(cp, (char *)&(u), l); \ 1481 cp += l; \ 1482 if (verbose) \ 1483 sodump((struct sockaddr *)&(u), #w); \ 1484 } 1485 1486 errno = 0; 1487 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1488 if (cmd == 'a') 1489 cmd = RTM_ADD; 1490 else if (cmd == 'c') 1491 cmd = RTM_CHANGE; 1492 else if (cmd == 'g' || cmd == 's') { 1493 cmd = RTM_GET; 1494 if (so[RTAX_IFP].ss_family == 0) { 1495 so[RTAX_IFP].ss_family = AF_LINK; 1496 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1497 rtm_addrs |= RTA_IFP; 1498 } 1499 } else 1500 cmd = RTM_DELETE; 1501 #define rtm m_rtmsg.m_rtm 1502 rtm.rtm_type = cmd; 1503 rtm.rtm_flags = flags; 1504 rtm.rtm_version = RTM_VERSION; 1505 rtm.rtm_seq = ++seq; 1506 rtm.rtm_addrs = rtm_addrs; 1507 rtm.rtm_rmx = rt_metrics; 1508 rtm.rtm_inits = rtm_inits; 1509 1510 NEXTADDR(RTA_DST, so[RTAX_DST]); 1511 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1512 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1513 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1514 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1515 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1516 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1517 if (verbose) 1518 print_rtmsg(&rtm, l); 1519 if (debugonly) 1520 return (0); 1521 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1522 if (errno == EPERM) 1523 err(1, "writing to routing socket"); 1524 warn("writing to routing socket"); 1525 return (-1); 1526 } 1527 if (cmd == RTM_GET) { 1528 do { 1529 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1530 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1531 if (l < 0) 1532 warn("read from routing socket"); 1533 else 1534 print_getmsg(&rtm, l, fib); 1535 } 1536 #undef rtm 1537 return (0); 1538 } 1539 1540 static const char *msgtypes[] = { 1541 "", 1542 "RTM_ADD: Add Route", 1543 "RTM_DELETE: Delete Route", 1544 "RTM_CHANGE: Change Metrics or flags", 1545 "RTM_GET: Report Metrics", 1546 "RTM_LOSING: Kernel Suspects Partitioning", 1547 "RTM_REDIRECT: Told to use different route", 1548 "RTM_MISS: Lookup failed on this address", 1549 "RTM_LOCK: fix specified metrics", 1550 "RTM_OLDADD: caused by SIOCADDRT", 1551 "RTM_OLDDEL: caused by SIOCDELRT", 1552 "RTM_RESOLVE: Route created by cloning", 1553 "RTM_NEWADDR: address being added to iface", 1554 "RTM_DELADDR: address being removed from iface", 1555 "RTM_IFINFO: iface status change", 1556 "RTM_NEWMADDR: new multicast group membership on iface", 1557 "RTM_DELMADDR: multicast group membership removed from iface", 1558 "RTM_IFANNOUNCE: interface arrival/departure", 1559 "RTM_IEEE80211: IEEE 802.11 wireless event", 1560 }; 1561 1562 static const char metricnames[] = 1563 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1564 "\1mtu"; 1565 static const char routeflags[] = 1566 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1567 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1568 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1569 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1570 static const char ifnetflags[] = 1571 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1572 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1573 "\017LINK2\020MULTICAST"; 1574 static const char addrnames[] = 1575 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1576 1577 static const char errfmt[] = 1578 "\n%s: truncated route message, only %zu bytes left\n"; 1579 1580 static void 1581 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1582 { 1583 struct if_msghdr *ifm; 1584 struct ifa_msghdr *ifam; 1585 #ifdef RTM_NEWMADDR 1586 struct ifma_msghdr *ifmam; 1587 #endif 1588 struct if_announcemsghdr *ifan; 1589 const char *state; 1590 1591 if (verbose == 0) 1592 return; 1593 if (rtm->rtm_version != RTM_VERSION) { 1594 (void)printf("routing message version %d not understood\n", 1595 rtm->rtm_version); 1596 return; 1597 } 1598 if (rtm->rtm_type < nitems(msgtypes)) 1599 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1600 else 1601 (void)printf("unknown type %d: ", rtm->rtm_type); 1602 (void)printf("len %d, ", rtm->rtm_msglen); 1603 1604 #define REQUIRE(x) do { \ 1605 if (msglen < sizeof(x)) \ 1606 goto badlen; \ 1607 else \ 1608 msglen -= sizeof(x); \ 1609 } while (0) 1610 1611 switch (rtm->rtm_type) { 1612 case RTM_IFINFO: 1613 REQUIRE(struct if_msghdr); 1614 ifm = (struct if_msghdr *)rtm; 1615 (void)printf("if# %d, ", ifm->ifm_index); 1616 switch (ifm->ifm_data.ifi_link_state) { 1617 case LINK_STATE_DOWN: 1618 state = "down"; 1619 break; 1620 case LINK_STATE_UP: 1621 state = "up"; 1622 break; 1623 default: 1624 state = "unknown"; 1625 break; 1626 } 1627 (void)printf("link: %s, flags:", state); 1628 printb(ifm->ifm_flags, ifnetflags); 1629 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1630 break; 1631 case RTM_NEWADDR: 1632 case RTM_DELADDR: 1633 REQUIRE(struct ifa_msghdr); 1634 ifam = (struct ifa_msghdr *)rtm; 1635 (void)printf("metric %d, flags:", ifam->ifam_metric); 1636 printb(ifam->ifam_flags, routeflags); 1637 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1638 break; 1639 #ifdef RTM_NEWMADDR 1640 case RTM_NEWMADDR: 1641 case RTM_DELMADDR: 1642 REQUIRE(struct ifma_msghdr); 1643 ifmam = (struct ifma_msghdr *)rtm; 1644 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1645 break; 1646 #endif 1647 case RTM_IFANNOUNCE: 1648 REQUIRE(struct if_announcemsghdr); 1649 ifan = (struct if_announcemsghdr *)rtm; 1650 (void)printf("if# %d, what: ", ifan->ifan_index); 1651 switch (ifan->ifan_what) { 1652 case IFAN_ARRIVAL: 1653 (void)printf("arrival"); 1654 break; 1655 case IFAN_DEPARTURE: 1656 printf("departure"); 1657 break; 1658 default: 1659 printf("#%d", ifan->ifan_what); 1660 break; 1661 } 1662 printf("\n"); 1663 fflush(stdout); 1664 break; 1665 1666 default: 1667 printf("pid: %ld, seq %d, errno %d, flags:", 1668 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1669 printb(rtm->rtm_flags, routeflags); 1670 pmsg_common(rtm, msglen); 1671 } 1672 1673 return; 1674 1675 badlen: 1676 (void)printf(errfmt, __func__, msglen); 1677 #undef REQUIRE 1678 } 1679 1680 static void 1681 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1682 { 1683 struct sockaddr *sp[RTAX_MAX]; 1684 char *cp; 1685 int i; 1686 1687 memset(sp, 0, sizeof(sp)); 1688 (void)printf(" route to: %s\n", 1689 routename((struct sockaddr *)&so[RTAX_DST])); 1690 if (rtm->rtm_version != RTM_VERSION) { 1691 warnx("routing message version %d not understood", 1692 rtm->rtm_version); 1693 return; 1694 } 1695 if (rtm->rtm_msglen > msglen) { 1696 warnx("message length mismatch, in packet %d, returned %d", 1697 rtm->rtm_msglen, msglen); 1698 return; 1699 } 1700 if (rtm->rtm_errno) { 1701 errno = rtm->rtm_errno; 1702 warn("message indicates error %d", errno); 1703 return; 1704 } 1705 cp = ((char *)(rtm + 1)); 1706 for (i = 0; i < RTAX_MAX; i++) 1707 if (rtm->rtm_addrs & (1 << i)) { 1708 sp[i] = (struct sockaddr *)cp; 1709 cp += SA_SIZE((struct sockaddr *)cp); 1710 } 1711 if ((rtm->rtm_addrs & RTA_IFP) && 1712 (sp[RTAX_IFP]->sa_family != AF_LINK || 1713 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1714 sp[RTAX_IFP] = NULL; 1715 if (sp[RTAX_DST] && sp[RTAX_NETMASK]) 1716 sp[RTAX_NETMASK]->sa_family = sp[RTAX_DST]->sa_family; /* XXX */ 1717 if (sp[RTAX_DST]) 1718 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1719 if (sp[RTAX_NETMASK]) 1720 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1721 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1722 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1723 if (fib >= 0) 1724 (void)printf(" fib: %u\n", (unsigned int)fib); 1725 if (sp[RTAX_IFP]) 1726 (void)printf(" interface: %.*s\n", 1727 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1728 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1729 (void)printf(" flags: "); 1730 printb(rtm->rtm_flags, routeflags); 1731 1732 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1733 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1734 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1735 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1736 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1737 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1738 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1739 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1740 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1741 printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1742 if (rtm->rtm_rmx.rmx_expire) 1743 rtm->rtm_rmx.rmx_expire -= time(0); 1744 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1745 #undef lock 1746 #undef msec 1747 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1748 if (verbose) 1749 pmsg_common(rtm, msglen); 1750 else if (rtm->rtm_addrs &~ RTA_IGN) { 1751 (void)printf("sockaddrs: "); 1752 printb(rtm->rtm_addrs, addrnames); 1753 putchar('\n'); 1754 } 1755 #undef RTA_IGN 1756 } 1757 1758 static void 1759 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1760 { 1761 1762 (void)printf("\nlocks: "); 1763 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1764 (void)printf(" inits: "); 1765 printb(rtm->rtm_inits, metricnames); 1766 if (msglen > sizeof(struct rt_msghdr)) 1767 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1768 msglen - sizeof(struct rt_msghdr)); 1769 else 1770 (void)fflush(stdout); 1771 } 1772 1773 static void 1774 pmsg_addrs(char *cp, int addrs, size_t len) 1775 { 1776 struct sockaddr *sa; 1777 int i; 1778 1779 if (addrs == 0) { 1780 (void)putchar('\n'); 1781 return; 1782 } 1783 (void)printf("\nsockaddrs: "); 1784 printb(addrs, addrnames); 1785 putchar('\n'); 1786 for (i = 0; i < RTAX_MAX; i++) 1787 if (addrs & (1 << i)) { 1788 sa = (struct sockaddr *)cp; 1789 if (len == 0 || len < SA_SIZE(sa)) { 1790 (void)printf(errfmt, __func__, len); 1791 break; 1792 } 1793 (void)printf(" %s", routename(sa)); 1794 len -= SA_SIZE(sa); 1795 cp += SA_SIZE(sa); 1796 } 1797 (void)putchar('\n'); 1798 (void)fflush(stdout); 1799 } 1800 1801 static void 1802 printb(int b, const char *str) 1803 { 1804 int i; 1805 int gotsome = 0; 1806 1807 if (b == 0) 1808 return; 1809 while ((i = *str++) != 0) { 1810 if (b & (1 << (i-1))) { 1811 if (gotsome == 0) 1812 i = '<'; 1813 else 1814 i = ','; 1815 putchar(i); 1816 gotsome = 1; 1817 for (; (i = *str) > 32; str++) 1818 putchar(i); 1819 } else 1820 while (*str > 32) 1821 str++; 1822 } 1823 if (gotsome) 1824 putchar('>'); 1825 } 1826 1827 int 1828 keyword(const char *cp) 1829 { 1830 struct keytab *kt = keywords; 1831 1832 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1833 kt++; 1834 return (kt->kt_i); 1835 } 1836 1837 static void 1838 sodump(struct sockaddr *sa, const char *which) 1839 { 1840 #ifdef INET6 1841 char nbuf[INET6_ADDRSTRLEN]; 1842 #endif 1843 1844 switch (sa->sa_family) { 1845 case AF_LINK: 1846 (void)printf("%s: link %s; ", which, 1847 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1848 break; 1849 #ifdef INET 1850 case AF_INET: 1851 (void)printf("%s: inet %s; ", which, 1852 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1853 break; 1854 #endif 1855 #ifdef INET6 1856 case AF_INET6: 1857 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1858 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1859 sizeof(nbuf))); 1860 break; 1861 #endif 1862 case AF_APPLETALK: 1863 (void)printf("%s: atalk %s; ", which, 1864 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 1865 break; 1866 } 1867 (void)fflush(stdout); 1868 } 1869 1870 /* States*/ 1871 #define VIRGIN 0 1872 #define GOTONE 1 1873 #define GOTTWO 2 1874 /* Inputs */ 1875 #define DIGIT (4*0) 1876 #define END (4*1) 1877 #define DELIM (4*2) 1878 1879 static void 1880 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1881 { 1882 char *cp = (char *)sa; 1883 char *cplim = cp + size; 1884 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1885 1886 memset(cp, 0, size); 1887 cp++; 1888 do { 1889 if ((*addr >= '0') && (*addr <= '9')) { 1890 new = *addr - '0'; 1891 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1892 new = *addr - 'a' + 10; 1893 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1894 new = *addr - 'A' + 10; 1895 } else if (*addr == '\0') 1896 state |= END; 1897 else 1898 state |= DELIM; 1899 addr++; 1900 switch (state /* | INPUT */) { 1901 case GOTTWO | DIGIT: 1902 *cp++ = byte; /*FALLTHROUGH*/ 1903 case VIRGIN | DIGIT: 1904 state = GOTONE; byte = new; continue; 1905 case GOTONE | DIGIT: 1906 state = GOTTWO; byte = new + (byte << 4); continue; 1907 default: /* | DELIM */ 1908 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1909 case GOTONE | END: 1910 case GOTTWO | END: 1911 *cp++ = byte; /* FALLTHROUGH */ 1912 case VIRGIN | END: 1913 break; 1914 } 1915 break; 1916 } while (cp < cplim); 1917 sa->sa_len = cp - (char *)sa; 1918 } 1919 1920 static int 1921 atalk_aton(const char *text, struct at_addr *addr) 1922 { 1923 u_int net, node; 1924 1925 if (sscanf(text, "%u.%u", &net, &node) != 2 1926 || net > 0xffff || node > 0xff) 1927 return(0); 1928 addr->s_net = htons(net); 1929 addr->s_node = node; 1930 return(1); 1931 } 1932 1933 static char * 1934 atalk_ntoa(struct at_addr at) 1935 { 1936 static char buf[20]; 1937 1938 (void)snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1939 buf[sizeof(buf) - 1] = '\0'; 1940 return(buf); 1941 } 1942