route.c revision 253519
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 31static 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 38static 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: head/sbin/route/route.c 253519 2013-07-21 14:27:07Z hrs $"); 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 73static struct keytab { 74 const char *kt_cp; 75 int kt_i; 76} keywords[] = { 77#include "keywords.h" 78 {0, 0} 79}; 80 81static struct sockaddr_storage so[RTAX_MAX]; 82static int pid, rtm_addrs; 83static int s; 84static int forcehost, forcenet, nflag, af, qflag, tflag; 85static int verbose, aflen; 86static int locking, lockrest, debugonly; 87static struct rt_metrics rt_metrics; 88static u_long rtm_inits; 89static uid_t uid; 90static int defaultfib; 91static int numfibs; 92 93static int atalk_aton(const char *, struct at_addr *); 94static char *atalk_ntoa(struct at_addr); 95static void printb(int, const char *); 96static void flushroutes(int argc, char *argv[]); 97static int flushroutes_fib(int); 98static int getaddr(int, char *, struct hostent **, int); 99static int keyword(const char *); 100#ifdef INET 101static void inet_makenetandmask(u_long, struct sockaddr_in *, 102 struct sockaddr_in *, u_long); 103#endif 104#ifdef INET6 105static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 106#endif 107static void interfaces(void); 108static void monitor(int, char*[]); 109static const char *netname(struct sockaddr *); 110static void newroute(int, char **); 111static int newroute_fib(int, char *, int); 112static void pmsg_addrs(char *, int, size_t); 113static void pmsg_common(struct rt_msghdr *, size_t); 114static int prefixlen(const char *); 115static void print_getmsg(struct rt_msghdr *, int, int); 116static void print_rtmsg(struct rt_msghdr *, size_t); 117static const char *routename(struct sockaddr *); 118static int rtmsg(int, int, int); 119static void set_metric(char *, int); 120static int set_sofib(int); 121static void sockaddr(char *, struct sockaddr *, size_t); 122static void sodump(struct sockaddr *, const char *); 123 124struct fibl { 125 TAILQ_ENTRY(fibl) fl_next; 126 127 int fl_num; 128 int fl_error; 129 int fl_errno; 130}; 131static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 132 133static int fiboptlist_csv(const char *, struct fibl_head_t *); 134static int fiboptlist_range(const char *, struct fibl_head_t *); 135 136static void usage(const char *) __dead2; 137 138static void 139usage(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 147int 148main(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 226static int 227set_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 236static int 237fiboptlist_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 } 281fiboptlist_range_ret: 282 free(str0); 283 return (error); 284} 285 286#define ALLSTRLEN 64 287static int 288fiboptlist_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 } 343fiboptlist_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 */ 353static void 354flushroutes(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 406static int 407flushroutes_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 421retry: 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 492static const char * 493routename(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 */ 618static const char * 619netname(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 722static void 723set_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 754static void 755newroute(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 (nrflags & F_FORCEHOST) { 932 nrflags |= F_ISHOST; 933#ifdef INET6 934 if (af == AF_INET6) { 935 rtm_addrs &= ~RTA_NETMASK; 936 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 937 } 938#endif 939 } 940 if (nrflags & F_FORCENET) 941 nrflags &= ~F_ISHOST; 942 flags |= RTF_UP; 943 if (nrflags & F_ISHOST) 944 flags |= RTF_HOST; 945 if ((nrflags & F_INTERFACE) == 0) 946 flags |= RTF_GATEWAY; 947 if (nrflags & F_PROXY) 948 flags |= RTF_ANNOUNCE; 949 if (dest == NULL) 950 dest = ""; 951 if (gateway == NULL) 952 gateway = ""; 953 954 if (TAILQ_EMPTY(&fibl_head)) { 955 error = fiboptlist_csv("default", &fibl_head); 956 if (error) 957 errx(EX_OSERR, "fiboptlist_csv failed."); 958 } 959 error = 0; 960 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 961 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 962 if (fl->fl_error) 963 fl->fl_errno = errno; 964 error += fl->fl_error; 965 } 966 if (*cmd == 'g' || *cmd == 's') 967 exit(error); 968 969 error = 0; 970 if (!qflag) { 971 fibnum = 0; 972 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 973 if (fl->fl_error == 0) 974 fibnum++; 975 } 976 if (fibnum > 0) { 977 int firstfib = 1; 978 979 printf("%s %s %s", cmd, 980 (nrflags & F_ISHOST) ? "host" : "net", dest); 981 if (*gateway) 982 printf(": gateway %s", gateway); 983 984 if (numfibs > 1) { 985 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 986 if (fl->fl_error == 0 987 && fl->fl_num >= 0) { 988 if (firstfib) { 989 printf(" fib "); 990 firstfib = 0; 991 } 992 printf("%d", fl->fl_num); 993 if (fibnum-- > 1) 994 printf(","); 995 } 996 } 997 } 998 printf("\n"); 999 } 1000 1001 fibnum = 0; 1002 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1003 if (fl->fl_error != 0) { 1004 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1005 ? "host" : "net", dest); 1006 if (*gateway) 1007 printf(": gateway %s", gateway); 1008 1009 if (fl->fl_num >= 0) 1010 printf(" fib %d", fl->fl_num); 1011 1012 switch (fl->fl_errno) { 1013 case ESRCH: 1014 errmsg = "not in table"; 1015 break; 1016 case EBUSY: 1017 errmsg = "entry in use"; 1018 break; 1019 case ENOBUFS: 1020 errmsg = "not enough memory"; 1021 break; 1022 case EADDRINUSE: 1023 /* 1024 * handle recursion avoidance 1025 * in rt_setgate() 1026 */ 1027 errmsg = "gateway uses the same route"; 1028 break; 1029 case EEXIST: 1030 errmsg = "route already in table"; 1031 break; 1032 default: 1033 errmsg = strerror(fl->fl_errno); 1034 break; 1035 } 1036 printf(": %s\n", errmsg); 1037 error = 1; 1038 } 1039 } 1040 } 1041 exit(error); 1042} 1043 1044static int 1045newroute_fib(int fib, char *cmd, int flags) 1046{ 1047 int error; 1048 1049 error = set_sofib(fib); 1050 if (error) { 1051 warn("fib number %d is ignored", fib); 1052 return (error); 1053 } 1054 1055 error = rtmsg(*cmd, flags, fib); 1056 return (error); 1057} 1058 1059#ifdef INET 1060static void 1061inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1062 struct sockaddr_in *sin_mask, u_long bits) 1063{ 1064 u_long mask = 0; 1065 1066 rtm_addrs |= RTA_NETMASK; 1067 1068 /* 1069 * MSB of net should be meaningful. 0/0 is exception. 1070 */ 1071 if (net > 0) 1072 while ((net & 0xff000000) == 0) 1073 net <<= 8; 1074 1075 /* 1076 * If no /xx was specified we must calculate the 1077 * CIDR address. 1078 */ 1079 if ((bits == 0) && (net != 0)) { 1080 u_long i, j; 1081 1082 for(i = 0, j = 0xff; i < 4; i++) { 1083 if (net & j) { 1084 break; 1085 } 1086 j <<= 8; 1087 } 1088 /* i holds the first non zero bit */ 1089 bits = 32 - (i*8); 1090 } 1091 if (bits != 0) 1092 mask = 0xffffffff << (32 - bits); 1093 1094 sin->sin_addr.s_addr = htonl(net); 1095 sin_mask->sin_addr.s_addr = htonl(mask); 1096 sin_mask->sin_len = sizeof(struct sockaddr_in); 1097 sin_mask->sin_family = AF_INET; 1098} 1099#endif 1100 1101#ifdef INET6 1102/* 1103 * XXX the function may need more improvement... 1104 */ 1105static int 1106inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1107{ 1108 struct in6_addr in6; 1109 1110 if (plen == NULL) { 1111 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1112 sin6->sin6_scope_id == 0) { 1113 plen = "0"; 1114 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1115 /* aggregatable global unicast - RFC2374 */ 1116 memset(&in6, 0, sizeof(in6)); 1117 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1118 &in6.s6_addr[8], 8)) 1119 plen = "64"; 1120 } 1121 } 1122 1123 if (plen == NULL || strcmp(plen, "128") == 0) 1124 return (1); 1125 rtm_addrs |= RTA_NETMASK; 1126 prefixlen(plen); 1127 return (0); 1128} 1129#endif 1130 1131/* 1132 * Interpret an argument as a network address of some kind, 1133 * returning 1 if a host address, 0 if a network address. 1134 */ 1135static int 1136getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1137{ 1138 struct sockaddr *sa; 1139#if defined(INET) 1140 struct sockaddr_in *sin; 1141 struct hostent *hp; 1142 struct netent *np; 1143 u_long val; 1144 char *q; 1145#elif defined(INET6) 1146 char *q; 1147#endif 1148 1149 if (af == 0) { 1150#if defined(INET) 1151 af = AF_INET; 1152 aflen = sizeof(struct sockaddr_in); 1153#elif defined(INET6) 1154 af = AF_INET6; 1155 aflen = sizeof(struct sockaddr_in6); 1156#else 1157 af = AF_LINK; 1158 aflen = sizeof(struct sockaddr_dl); 1159#endif 1160 } 1161#ifndef INET 1162 hpp = NULL; 1163#endif 1164 rtm_addrs |= (1 << idx); 1165 1166 if (idx > RTAX_MAX) 1167 usage("internal error"); 1168 sa = (struct sockaddr *)&so[idx]; 1169 sa->sa_family = af; 1170 sa->sa_len = aflen; 1171 1172 switch (idx) { 1173 case RTAX_GATEWAY: 1174 if (nrflags & F_INTERFACE) { 1175 struct ifaddrs *ifap, *ifa; 1176 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1177 struct sockaddr_dl *sdl = NULL; 1178 1179 if (getifaddrs(&ifap)) 1180 err(EX_OSERR, "getifaddrs"); 1181 1182 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1183 if (ifa->ifa_addr->sa_family != AF_LINK) 1184 continue; 1185 1186 if (strcmp(str, ifa->ifa_name) != 0) 1187 continue; 1188 1189 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1190 } 1191 /* If we found it, then use it */ 1192 if (sdl != NULL) { 1193 /* 1194 * Note that we need to copy before calling 1195 * freeifaddrs(). 1196 */ 1197 memcpy(sdl0, sdl, sdl->sdl_len); 1198 } 1199 freeifaddrs(ifap); 1200 if (sdl != NULL) 1201 return(1); 1202 } 1203 break; 1204 case RTAX_IFP: 1205 sa->sa_family = AF_LINK; 1206 break; 1207 } 1208 if (strcmp(str, "default") == 0) { 1209 /* 1210 * Default is net 0.0.0.0/0 1211 */ 1212 switch (idx) { 1213 case RTAX_DST: 1214 forcenet++; 1215 getaddr(RTAX_NETMASK, str, 0, nrflags); 1216 break; 1217 } 1218 return (0); 1219 } 1220 switch (sa->sa_family) { 1221#ifdef INET6 1222 case AF_INET6: 1223 { 1224 struct addrinfo hints, *res; 1225 int ecode; 1226 1227 q = NULL; 1228 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1229 *q = '\0'; 1230 memset(&hints, 0, sizeof(hints)); 1231 hints.ai_family = sa->sa_family; 1232 hints.ai_socktype = SOCK_DGRAM; 1233 ecode = getaddrinfo(str, NULL, &hints, &res); 1234 if (ecode != 0 || res->ai_family != AF_INET6 || 1235 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1236 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1237 memcpy(sa, res->ai_addr, res->ai_addrlen); 1238 freeaddrinfo(res); 1239 if (q != NULL) 1240 *q++ = '/'; 1241 if (idx == RTAX_DST) 1242 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1243 return (0); 1244 } 1245#endif /* INET6 */ 1246 1247 case AF_APPLETALK: 1248 { 1249 struct sockaddr_at *sat = (struct sockaddr_at *)(void *)sa; 1250 1251 if (!atalk_aton(str, &sat->sat_addr)) 1252 errx(EX_NOHOST, "bad address: %s", str); 1253 rtm_addrs |= RTA_NETMASK; 1254 return(forcehost || sat->sat_addr.s_node != 0); 1255 } 1256 case AF_LINK: 1257 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1258 return (1); 1259 1260 case PF_ROUTE: 1261 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1262 return (1); 1263#ifdef INET 1264 case AF_INET: 1265#endif 1266 default: 1267 break; 1268 } 1269 1270#ifdef INET 1271 sin = (struct sockaddr_in *)(void *)sa; 1272 if (hpp == NULL) 1273 hpp = &hp; 1274 *hpp = NULL; 1275 1276 q = strchr(str,'/'); 1277 if (q != NULL && idx == RTAX_DST) { 1278 *q = '\0'; 1279 if ((val = inet_network(str)) != INADDR_NONE) { 1280 inet_makenetandmask(val, sin, 1281 (struct sockaddr_in *)&so[RTAX_NETMASK], 1282 strtoul(q+1, 0, 0)); 1283 return (0); 1284 } 1285 *q = '/'; 1286 } 1287 if ((idx != RTAX_DST || forcenet == 0) && 1288 inet_aton(str, &sin->sin_addr)) { 1289 val = sin->sin_addr.s_addr; 1290 if (idx != RTAX_DST || forcehost || 1291 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1292 return (1); 1293 else { 1294 val = ntohl(val); 1295 goto netdone; 1296 } 1297 } 1298 if (idx == RTAX_DST && forcehost == 0 && 1299 ((val = inet_network(str)) != INADDR_NONE || 1300 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1301netdone: 1302 inet_makenetandmask(val, sin, 1303 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1304 return (0); 1305 } 1306 hp = gethostbyname(str); 1307 if (hp != NULL) { 1308 *hpp = hp; 1309 sin->sin_family = hp->h_addrtype; 1310 memmove((char *)&sin->sin_addr, hp->h_addr, 1311 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1312 return (1); 1313 } 1314#endif 1315 errx(EX_NOHOST, "bad address: %s", str); 1316} 1317 1318static int 1319prefixlen(const char *str) 1320{ 1321 int len = atoi(str), q, r; 1322 int max; 1323 char *p; 1324 1325 rtm_addrs |= RTA_NETMASK; 1326 switch (af) { 1327#ifdef INET6 1328 case AF_INET6: 1329 { 1330 struct sockaddr_in6 *sin6 = 1331 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1332 1333 max = 128; 1334 p = (char *)&sin6->sin6_addr; 1335 sin6->sin6_family = AF_INET6; 1336 sin6->sin6_len = sizeof(*sin6); 1337 break; 1338 } 1339#endif 1340#ifdef INET 1341 case AF_INET: 1342 { 1343 struct sockaddr_in *sin = 1344 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1345 1346 max = 32; 1347 p = (char *)&sin->sin_addr; 1348 sin->sin_family = AF_INET; 1349 sin->sin_len = sizeof(*sin); 1350 break; 1351 } 1352#endif 1353 default: 1354 errx(EX_OSERR, "prefixlen not supported in this af"); 1355 } 1356 1357 if (len < 0 || max < len) 1358 errx(EX_USAGE, "%s: invalid prefixlen", str); 1359 1360 q = len >> 3; 1361 r = len & 7; 1362 memset((void *)p, 0, max / 8); 1363 if (q > 0) 1364 memset((void *)p, 0xff, q); 1365 if (r > 0) 1366 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1367 if (len == max) 1368 return (-1); 1369 else 1370 return (len); 1371} 1372 1373static void 1374interfaces(void) 1375{ 1376 size_t needed; 1377 int mib[6]; 1378 char *buf, *lim, *next, count = 0; 1379 struct rt_msghdr *rtm; 1380 1381retry2: 1382 mib[0] = CTL_NET; 1383 mib[1] = PF_ROUTE; 1384 mib[2] = 0; /* protocol */ 1385 mib[3] = AF_UNSPEC; 1386 mib[4] = NET_RT_IFLIST; 1387 mib[5] = 0; /* no flags */ 1388 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1389 err(EX_OSERR, "route-sysctl-estimate"); 1390 if ((buf = malloc(needed)) == NULL) 1391 errx(EX_OSERR, "malloc failed"); 1392 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1393 if (errno == ENOMEM && count++ < 10) { 1394 warnx("Routing table grew, retrying"); 1395 sleep(1); 1396 free(buf); 1397 goto retry2; 1398 } 1399 err(EX_OSERR, "actual retrieval of interface table"); 1400 } 1401 lim = buf + needed; 1402 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1403 rtm = (struct rt_msghdr *)(void *)next; 1404 print_rtmsg(rtm, rtm->rtm_msglen); 1405 } 1406} 1407 1408static void 1409monitor(int argc, char *argv[]) 1410{ 1411 int n, fib, error; 1412 char msg[2048], *endptr; 1413 1414 fib = defaultfib; 1415 while (argc > 1) { 1416 argc--; 1417 argv++; 1418 if (**argv != '-') 1419 usage(*argv); 1420 switch (keyword(*argv + 1)) { 1421 case K_FIB: 1422 if (!--argc) 1423 usage(*argv); 1424 errno = 0; 1425 fib = strtol(*++argv, &endptr, 0); 1426 if (errno == 0) { 1427 if (*endptr != '\0' || 1428 fib < 0 || 1429 (numfibs != -1 && fib > numfibs - 1)) 1430 errno = EINVAL; 1431 } 1432 if (errno) 1433 errx(EX_USAGE, "invalid fib number: %s", *argv); 1434 break; 1435 default: 1436 usage(*argv); 1437 } 1438 } 1439 error = set_sofib(fib); 1440 if (error) 1441 errx(EX_USAGE, "invalid fib number: %d", fib); 1442 1443 verbose = 1; 1444 if (debugonly) { 1445 interfaces(); 1446 exit(0); 1447 } 1448 for (;;) { 1449 time_t now; 1450 n = read(s, msg, 2048); 1451 now = time(NULL); 1452 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1453 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1454 } 1455} 1456 1457static struct { 1458 struct rt_msghdr m_rtm; 1459 char m_space[512]; 1460} m_rtmsg; 1461 1462static int 1463rtmsg(int cmd, int flags, int fib) 1464{ 1465 static int seq; 1466 int rlen; 1467 char *cp = m_rtmsg.m_space; 1468 int l; 1469 1470#define NEXTADDR(w, u) \ 1471 if (rtm_addrs & (w)) { \ 1472 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1473 sizeof(long) : \ 1474 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1475 | (sizeof(long) - 1)); \ 1476 memmove(cp, (char *)&(u), l); \ 1477 cp += l; \ 1478 if (verbose) \ 1479 sodump((struct sockaddr *)&(u), #w); \ 1480 } 1481 1482 errno = 0; 1483 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1484 if (cmd == 'a') 1485 cmd = RTM_ADD; 1486 else if (cmd == 'c') 1487 cmd = RTM_CHANGE; 1488 else if (cmd == 'g' || cmd == 's') { 1489 cmd = RTM_GET; 1490 if (so[RTAX_IFP].ss_family == 0) { 1491 so[RTAX_IFP].ss_family = AF_LINK; 1492 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1493 rtm_addrs |= RTA_IFP; 1494 } 1495 } else 1496 cmd = RTM_DELETE; 1497#define rtm m_rtmsg.m_rtm 1498 rtm.rtm_type = cmd; 1499 rtm.rtm_flags = flags; 1500 rtm.rtm_version = RTM_VERSION; 1501 rtm.rtm_seq = ++seq; 1502 rtm.rtm_addrs = rtm_addrs; 1503 rtm.rtm_rmx = rt_metrics; 1504 rtm.rtm_inits = rtm_inits; 1505 1506 NEXTADDR(RTA_DST, so[RTAX_DST]); 1507 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1508 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1509 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1510 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1511 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1512 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1513 if (verbose) 1514 print_rtmsg(&rtm, l); 1515 if (debugonly) 1516 return (0); 1517 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1518 if (errno == EPERM) 1519 err(1, "writing to routing socket"); 1520 warn("writing to routing socket"); 1521 return (-1); 1522 } 1523 if (cmd == RTM_GET) { 1524 do { 1525 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1526 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1527 if (l < 0) 1528 warn("read from routing socket"); 1529 else 1530 print_getmsg(&rtm, l, fib); 1531 } 1532#undef rtm 1533 return (0); 1534} 1535 1536static const char *msgtypes[] = { 1537 "", 1538 "RTM_ADD: Add Route", 1539 "RTM_DELETE: Delete Route", 1540 "RTM_CHANGE: Change Metrics or flags", 1541 "RTM_GET: Report Metrics", 1542 "RTM_LOSING: Kernel Suspects Partitioning", 1543 "RTM_REDIRECT: Told to use different route", 1544 "RTM_MISS: Lookup failed on this address", 1545 "RTM_LOCK: fix specified metrics", 1546 "RTM_OLDADD: caused by SIOCADDRT", 1547 "RTM_OLDDEL: caused by SIOCDELRT", 1548 "RTM_RESOLVE: Route created by cloning", 1549 "RTM_NEWADDR: address being added to iface", 1550 "RTM_DELADDR: address being removed from iface", 1551 "RTM_IFINFO: iface status change", 1552 "RTM_NEWMADDR: new multicast group membership on iface", 1553 "RTM_DELMADDR: multicast group membership removed from iface", 1554 "RTM_IFANNOUNCE: interface arrival/departure", 1555 "RTM_IEEE80211: IEEE 802.11 wireless event", 1556}; 1557 1558static const char metricnames[] = 1559 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1560 "\1mtu"; 1561static const char routeflags[] = 1562 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1563 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1564 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1565 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1566static const char ifnetflags[] = 1567 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1568 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1569 "\017LINK2\020MULTICAST"; 1570static const char addrnames[] = 1571 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1572 1573static const char errfmt[] = 1574 "\n%s: truncated route message, only %zu bytes left\n"; 1575 1576static void 1577print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1578{ 1579 struct if_msghdr *ifm; 1580 struct ifa_msghdr *ifam; 1581#ifdef RTM_NEWMADDR 1582 struct ifma_msghdr *ifmam; 1583#endif 1584 struct if_announcemsghdr *ifan; 1585 const char *state; 1586 1587 if (verbose == 0) 1588 return; 1589 if (rtm->rtm_version != RTM_VERSION) { 1590 (void)printf("routing message version %d not understood\n", 1591 rtm->rtm_version); 1592 return; 1593 } 1594 if (rtm->rtm_type < nitems(msgtypes)) 1595 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1596 else 1597 (void)printf("unknown type %d: ", rtm->rtm_type); 1598 (void)printf("len %d, ", rtm->rtm_msglen); 1599 1600#define REQUIRE(x) do { \ 1601 if (msglen < sizeof(x)) \ 1602 goto badlen; \ 1603 else \ 1604 msglen -= sizeof(x); \ 1605 } while (0) 1606 1607 switch (rtm->rtm_type) { 1608 case RTM_IFINFO: 1609 REQUIRE(struct if_msghdr); 1610 ifm = (struct if_msghdr *)rtm; 1611 (void)printf("if# %d, ", ifm->ifm_index); 1612 switch (ifm->ifm_data.ifi_link_state) { 1613 case LINK_STATE_DOWN: 1614 state = "down"; 1615 break; 1616 case LINK_STATE_UP: 1617 state = "up"; 1618 break; 1619 default: 1620 state = "unknown"; 1621 break; 1622 } 1623 (void)printf("link: %s, flags:", state); 1624 printb(ifm->ifm_flags, ifnetflags); 1625 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1626 break; 1627 case RTM_NEWADDR: 1628 case RTM_DELADDR: 1629 REQUIRE(struct ifa_msghdr); 1630 ifam = (struct ifa_msghdr *)rtm; 1631 (void)printf("metric %d, flags:", ifam->ifam_metric); 1632 printb(ifam->ifam_flags, routeflags); 1633 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1634 break; 1635#ifdef RTM_NEWMADDR 1636 case RTM_NEWMADDR: 1637 case RTM_DELMADDR: 1638 REQUIRE(struct ifma_msghdr); 1639 ifmam = (struct ifma_msghdr *)rtm; 1640 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1641 break; 1642#endif 1643 case RTM_IFANNOUNCE: 1644 REQUIRE(struct if_announcemsghdr); 1645 ifan = (struct if_announcemsghdr *)rtm; 1646 (void)printf("if# %d, what: ", ifan->ifan_index); 1647 switch (ifan->ifan_what) { 1648 case IFAN_ARRIVAL: 1649 (void)printf("arrival"); 1650 break; 1651 case IFAN_DEPARTURE: 1652 printf("departure"); 1653 break; 1654 default: 1655 printf("#%d", ifan->ifan_what); 1656 break; 1657 } 1658 printf("\n"); 1659 fflush(stdout); 1660 break; 1661 1662 default: 1663 printf("pid: %ld, seq %d, errno %d, flags:", 1664 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1665 printb(rtm->rtm_flags, routeflags); 1666 pmsg_common(rtm, msglen); 1667 } 1668 1669 return; 1670 1671badlen: 1672 (void)printf(errfmt, __func__, msglen); 1673#undef REQUIRE 1674} 1675 1676static void 1677print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1678{ 1679 struct sockaddr *sp[RTAX_MAX]; 1680 char *cp; 1681 int i; 1682 1683 memset(sp, 0, sizeof(sp)); 1684 (void)printf(" route to: %s\n", 1685 routename((struct sockaddr *)&so[RTAX_DST])); 1686 if (rtm->rtm_version != RTM_VERSION) { 1687 warnx("routing message version %d not understood", 1688 rtm->rtm_version); 1689 return; 1690 } 1691 if (rtm->rtm_msglen > msglen) { 1692 warnx("message length mismatch, in packet %d, returned %d", 1693 rtm->rtm_msglen, msglen); 1694 return; 1695 } 1696 if (rtm->rtm_errno) { 1697 errno = rtm->rtm_errno; 1698 warn("message indicates error %d", errno); 1699 return; 1700 } 1701 cp = ((char *)(rtm + 1)); 1702 for (i = 0; i < RTAX_MAX; i++) { 1703 if (rtm->rtm_addrs & (1 << i)) 1704 sp[i] = (struct sockaddr *)cp; 1705 cp += SA_SIZE((struct sockaddr *)cp); 1706 } 1707 if (rtm->rtm_addrs & RTA_IFP) { 1708 if (sp[RTAX_IFP]->sa_family != AF_LINK || 1709 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0) 1710 sp[RTAX_IFP] = NULL; 1711 } 1712 if (sp[RTAX_DST] && sp[RTAX_NETMASK]) 1713 sp[RTAX_NETMASK]->sa_family = sp[RTAX_DST]->sa_family; /* XXX */ 1714 if (sp[RTAX_DST]) 1715 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1716 if (sp[RTAX_NETMASK]) 1717 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1718 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1719 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1720 if (fib >= 0) 1721 (void)printf(" fib: %u\n", (unsigned int)fib); 1722 if (sp[RTAX_IFP]) 1723 (void)printf(" interface: %.*s\n", 1724 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1725 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1726 (void)printf(" flags: "); 1727 printb(rtm->rtm_flags, routeflags); 1728 1729#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1730#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1731 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1732 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1733 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1734 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1735 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1736 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1737 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1738 printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1739 if (rtm->rtm_rmx.rmx_expire) 1740 rtm->rtm_rmx.rmx_expire -= time(0); 1741 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1742#undef lock 1743#undef msec 1744#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1745 if (verbose) 1746 pmsg_common(rtm, msglen); 1747 else if (rtm->rtm_addrs &~ RTA_IGN) { 1748 (void)printf("sockaddrs: "); 1749 printb(rtm->rtm_addrs, addrnames); 1750 putchar('\n'); 1751 } 1752#undef RTA_IGN 1753} 1754 1755static void 1756pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1757{ 1758 1759 (void)printf("\nlocks: "); 1760 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1761 (void)printf(" inits: "); 1762 printb(rtm->rtm_inits, metricnames); 1763 if (msglen > sizeof(struct rt_msghdr)) 1764 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1765 msglen - sizeof(struct rt_msghdr)); 1766 else 1767 (void)fflush(stdout); 1768} 1769 1770static void 1771pmsg_addrs(char *cp, int addrs, size_t len) 1772{ 1773 struct sockaddr *sa; 1774 int i; 1775 1776 if (addrs == 0) { 1777 (void)putchar('\n'); 1778 return; 1779 } 1780 (void)printf("\nsockaddrs: "); 1781 printb(addrs, addrnames); 1782 putchar('\n'); 1783 for (i = 0; i < RTAX_MAX; i++) 1784 if (addrs & (1 << i)) { 1785 sa = (struct sockaddr *)cp; 1786 if (len == 0 || len < SA_SIZE(sa)) { 1787 (void)printf(errfmt, __func__, len); 1788 break; 1789 } 1790 (void)printf(" %s", routename(sa)); 1791 len -= SA_SIZE(sa); 1792 cp += SA_SIZE(sa); 1793 } 1794 (void)putchar('\n'); 1795 (void)fflush(stdout); 1796} 1797 1798static void 1799printb(int b, const char *str) 1800{ 1801 int i; 1802 int gotsome = 0; 1803 1804 if (b == 0) 1805 return; 1806 while ((i = *str++) != 0) { 1807 if (b & (1 << (i-1))) { 1808 if (gotsome == 0) 1809 i = '<'; 1810 else 1811 i = ','; 1812 putchar(i); 1813 gotsome = 1; 1814 for (; (i = *str) > 32; str++) 1815 putchar(i); 1816 } else 1817 while (*str > 32) 1818 str++; 1819 } 1820 if (gotsome) 1821 putchar('>'); 1822} 1823 1824int 1825keyword(const char *cp) 1826{ 1827 struct keytab *kt = keywords; 1828 1829 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1830 kt++; 1831 return (kt->kt_i); 1832} 1833 1834static void 1835sodump(struct sockaddr *sa, const char *which) 1836{ 1837#ifdef INET6 1838 char nbuf[INET6_ADDRSTRLEN]; 1839#endif 1840 1841 switch (sa->sa_family) { 1842 case AF_LINK: 1843 (void)printf("%s: link %s; ", which, 1844 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1845 break; 1846#ifdef INET 1847 case AF_INET: 1848 (void)printf("%s: inet %s; ", which, 1849 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1850 break; 1851#endif 1852#ifdef INET6 1853 case AF_INET6: 1854 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1855 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1856 sizeof(nbuf))); 1857 break; 1858#endif 1859 case AF_APPLETALK: 1860 (void)printf("%s: atalk %s; ", which, 1861 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 1862 break; 1863 } 1864 (void)fflush(stdout); 1865} 1866 1867/* States*/ 1868#define VIRGIN 0 1869#define GOTONE 1 1870#define GOTTWO 2 1871/* Inputs */ 1872#define DIGIT (4*0) 1873#define END (4*1) 1874#define DELIM (4*2) 1875 1876static void 1877sockaddr(char *addr, struct sockaddr *sa, size_t size) 1878{ 1879 char *cp = (char *)sa; 1880 char *cplim = cp + size; 1881 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1882 1883 memset(cp, 0, size); 1884 cp++; 1885 do { 1886 if ((*addr >= '0') && (*addr <= '9')) { 1887 new = *addr - '0'; 1888 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1889 new = *addr - 'a' + 10; 1890 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1891 new = *addr - 'A' + 10; 1892 } else if (*addr == '\0') 1893 state |= END; 1894 else 1895 state |= DELIM; 1896 addr++; 1897 switch (state /* | INPUT */) { 1898 case GOTTWO | DIGIT: 1899 *cp++ = byte; /*FALLTHROUGH*/ 1900 case VIRGIN | DIGIT: 1901 state = GOTONE; byte = new; continue; 1902 case GOTONE | DIGIT: 1903 state = GOTTWO; byte = new + (byte << 4); continue; 1904 default: /* | DELIM */ 1905 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1906 case GOTONE | END: 1907 case GOTTWO | END: 1908 *cp++ = byte; /* FALLTHROUGH */ 1909 case VIRGIN | END: 1910 break; 1911 } 1912 break; 1913 } while (cp < cplim); 1914 sa->sa_len = cp - (char *)sa; 1915} 1916 1917static int 1918atalk_aton(const char *text, struct at_addr *addr) 1919{ 1920 u_int net, node; 1921 1922 if (sscanf(text, "%u.%u", &net, &node) != 2 1923 || net > 0xffff || node > 0xff) 1924 return(0); 1925 addr->s_net = htons(net); 1926 addr->s_node = node; 1927 return(1); 1928} 1929 1930static char * 1931atalk_ntoa(struct at_addr at) 1932{ 1933 static char buf[20]; 1934 1935 (void)snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1936 buf[sizeof(buf) - 1] = '\0'; 1937 return(buf); 1938} 1939