route.c revision 258907
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 258907 2013-12-04 04:29:52Z eadler $"); 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 <time.h> 71#include <unistd.h> 72#include <ifaddrs.h> 73 74static struct keytab { 75 const char *kt_cp; 76 int kt_i; 77} const keywords[] = { 78#include "keywords.h" 79 {0, 0} 80}; 81 82static struct sockaddr_storage so[RTAX_MAX]; 83static int pid, rtm_addrs; 84static int s; 85static int forcehost, forcenet, nflag, af, qflag, tflag; 86static int verbose, aflen; 87static int locking, lockrest, debugonly; 88static struct rt_metrics rt_metrics; 89static u_long rtm_inits; 90static uid_t uid; 91static int defaultfib; 92static int numfibs; 93 94static int atalk_aton(const char *, struct at_addr *); 95static char *atalk_ntoa(struct at_addr); 96static void printb(int, const char *); 97static void flushroutes(int argc, char *argv[]); 98static int flushroutes_fib(int); 99static int getaddr(int, char *, struct hostent **, int); 100static int keyword(const char *); 101#ifdef INET 102static void inet_makenetandmask(u_long, struct sockaddr_in *, 103 struct sockaddr_in *, u_long); 104#endif 105#ifdef INET6 106static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 107#endif 108static void interfaces(void); 109static void monitor(int, char*[]); 110static const char *netname(struct sockaddr *); 111static void newroute(int, char **); 112static int newroute_fib(int, char *, int); 113static void pmsg_addrs(char *, int, size_t); 114static void pmsg_common(struct rt_msghdr *, size_t); 115static int prefixlen(const char *); 116static void print_getmsg(struct rt_msghdr *, int, int); 117static void print_rtmsg(struct rt_msghdr *, size_t); 118static const char *routename(struct sockaddr *); 119static int rtmsg(int, int, int); 120static void set_metric(char *, int); 121static int set_sofib(int); 122static void sockaddr(char *, struct sockaddr *, size_t); 123static void sodump(struct sockaddr *, const char *); 124 125struct fibl { 126 TAILQ_ENTRY(fibl) fl_next; 127 128 int fl_num; 129 int fl_error; 130 int fl_errno; 131}; 132static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 133 134static int fiboptlist_csv(const char *, struct fibl_head_t *); 135static int fiboptlist_range(const char *, struct fibl_head_t *); 136 137static void usage(const char *) __dead2; 138 139static void 140usage(const char *cp) 141{ 142 if (cp != NULL) 143 warnx("bad keyword: %s", cp); 144 errx(EX_USAGE, "usage: route [-dnqtv] command [[modifiers] args]"); 145 /* NOTREACHED */ 146} 147 148int 149main(int argc, char **argv) 150{ 151 int ch; 152 size_t len; 153 154 if (argc < 2) 155 usage(NULL); 156 157 while ((ch = getopt(argc, argv, "nqdtv")) != -1) 158 switch(ch) { 159 case 'n': 160 nflag = 1; 161 break; 162 case 'q': 163 qflag = 1; 164 break; 165 case 'v': 166 verbose = 1; 167 break; 168 case 't': 169 tflag = 1; 170 break; 171 case 'd': 172 debugonly = 1; 173 break; 174 case '?': 175 default: 176 usage(NULL); 177 } 178 argc -= optind; 179 argv += optind; 180 181 pid = getpid(); 182 uid = geteuid(); 183 if (tflag) 184 s = open(_PATH_DEVNULL, O_WRONLY, 0); 185 else 186 s = socket(PF_ROUTE, SOCK_RAW, 0); 187 if (s < 0) 188 err(EX_OSERR, "socket"); 189 190 len = sizeof(numfibs); 191 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 192 numfibs = -1; 193 194 len = sizeof(defaultfib); 195 if (numfibs != -1 && 196 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 197 0) == -1) 198 defaultfib = -1; 199 200 if (*argv != NULL) 201 switch (keyword(*argv)) { 202 case K_GET: 203 case K_SHOW: 204 uid = 0; 205 /* FALLTHROUGH */ 206 207 case K_CHANGE: 208 case K_ADD: 209 case K_DEL: 210 case K_DELETE: 211 newroute(argc, argv); 212 /* NOTREACHED */ 213 214 case K_MONITOR: 215 monitor(argc, argv); 216 /* NOTREACHED */ 217 218 case K_FLUSH: 219 flushroutes(argc, argv); 220 exit(0); 221 /* NOTREACHED */ 222 } 223 usage(*argv); 224 /* NOTREACHED */ 225} 226 227static int 228set_sofib(int fib) 229{ 230 231 if (fib < 0) 232 return (0); 233 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 234 sizeof(fib))); 235} 236 237static int 238fiboptlist_range(const char *arg, struct fibl_head_t *flh) 239{ 240 struct fibl *fl; 241 char *str0, *str, *token, *endptr; 242 int fib[2], i, error; 243 244 str0 = str = strdup(arg); 245 error = 0; 246 i = 0; 247 while ((token = strsep(&str, "-")) != NULL) { 248 switch (i) { 249 case 0: 250 case 1: 251 errno = 0; 252 fib[i] = strtol(token, &endptr, 0); 253 if (errno == 0) { 254 if (*endptr != '\0' || 255 fib[i] < 0 || 256 (numfibs != -1 && fib[i] > numfibs - 1)) 257 errno = EINVAL; 258 } 259 if (errno) 260 error = 1; 261 break; 262 default: 263 error = 1; 264 } 265 if (error) 266 goto fiboptlist_range_ret; 267 i++; 268 } 269 if (fib[0] >= fib[1]) { 270 error = 1; 271 goto fiboptlist_range_ret; 272 } 273 for (i = fib[0]; i <= fib[1]; i++) { 274 fl = calloc(1, sizeof(*fl)); 275 if (fl == NULL) { 276 error = 1; 277 goto fiboptlist_range_ret; 278 } 279 fl->fl_num = i; 280 TAILQ_INSERT_TAIL(flh, fl, fl_next); 281 } 282fiboptlist_range_ret: 283 free(str0); 284 return (error); 285} 286 287#define ALLSTRLEN 64 288static int 289fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 290{ 291 struct fibl *fl; 292 char *str0, *str, *token, *endptr; 293 int fib, error; 294 295 str0 = str = NULL; 296 if (strcmp("all", arg) == 0) { 297 str = calloc(1, ALLSTRLEN); 298 if (str == NULL) { 299 error = 1; 300 goto fiboptlist_csv_ret; 301 } 302 if (numfibs > 1) 303 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 304 else 305 snprintf(str, ALLSTRLEN - 1, "%d", 0); 306 } else if (strcmp("default", arg) == 0) { 307 str0 = str = calloc(1, ALLSTRLEN); 308 if (str == NULL) { 309 error = 1; 310 goto fiboptlist_csv_ret; 311 } 312 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 313 } else 314 str0 = str = strdup(arg); 315 316 error = 0; 317 while ((token = strsep(&str, ",")) != NULL) { 318 if (*token != '-' && strchr(token, '-') != NULL) { 319 error = fiboptlist_range(token, flh); 320 if (error) 321 goto fiboptlist_csv_ret; 322 } else { 323 errno = 0; 324 fib = strtol(token, &endptr, 0); 325 if (errno == 0) { 326 if (*endptr != '\0' || 327 fib < 0 || 328 (numfibs != -1 && fib > numfibs - 1)) 329 errno = EINVAL; 330 } 331 if (errno) { 332 error = 1; 333 goto fiboptlist_csv_ret; 334 } 335 fl = calloc(1, sizeof(*fl)); 336 if (fl == NULL) { 337 error = 1; 338 goto fiboptlist_csv_ret; 339 } 340 fl->fl_num = fib; 341 TAILQ_INSERT_TAIL(flh, fl, fl_next); 342 } 343 } 344fiboptlist_csv_ret: 345 if (str0 != NULL) 346 free(str0); 347 return (error); 348} 349 350/* 351 * Purge all entries in the routing tables not 352 * associated with network interfaces. 353 */ 354static void 355flushroutes(int argc, char *argv[]) 356{ 357 struct fibl *fl; 358 int error; 359 360 if (uid != 0 && !debugonly && !tflag) 361 errx(EX_NOPERM, "must be root to alter routing table"); 362 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 363 364 TAILQ_INIT(&fibl_head); 365 while (argc > 1) { 366 argc--; 367 argv++; 368 if (**argv != '-') 369 usage(*argv); 370 switch (keyword(*argv + 1)) { 371#ifdef INET 372 case K_INET: 373 af = AF_INET; 374 break; 375#endif 376#ifdef INET6 377 case K_INET6: 378 af = AF_INET6; 379 break; 380#endif 381 case K_ATALK: 382 af = AF_APPLETALK; 383 break; 384 case K_LINK: 385 af = AF_LINK; 386 break; 387 case K_FIB: 388 if (!--argc) 389 usage(*argv); 390 error = fiboptlist_csv(*++argv, &fibl_head); 391 if (error) 392 errx(EX_USAGE, "invalid fib number: %s", *argv); 393 break; 394 default: 395 usage(*argv); 396 } 397 } 398 if (TAILQ_EMPTY(&fibl_head)) { 399 error = fiboptlist_csv("default", &fibl_head); 400 if (error) 401 errx(EX_OSERR, "fiboptlist_csv failed."); 402 } 403 TAILQ_FOREACH(fl, &fibl_head, fl_next) 404 flushroutes_fib(fl->fl_num); 405} 406 407static int 408flushroutes_fib(int fib) 409{ 410 struct rt_msghdr *rtm; 411 size_t needed; 412 char *buf, *next, *lim; 413 int mib[7], rlen, seqno, count = 0; 414 int error; 415 416 error = set_sofib(fib); 417 if (error) { 418 warn("fib number %d is ignored", fib); 419 return (error); 420 } 421 422retry: 423 mib[0] = CTL_NET; 424 mib[1] = PF_ROUTE; 425 mib[2] = 0; /* protocol */ 426 mib[3] = AF_UNSPEC; 427 mib[4] = NET_RT_DUMP; 428 mib[5] = 0; /* no flags */ 429 mib[6] = fib; 430 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 431 err(EX_OSERR, "route-sysctl-estimate"); 432 if ((buf = malloc(needed)) == NULL) 433 errx(EX_OSERR, "malloc failed"); 434 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 435 if (errno == ENOMEM && count++ < 10) { 436 warnx("Routing table grew, retrying"); 437 sleep(1); 438 free(buf); 439 goto retry; 440 } 441 err(EX_OSERR, "route-sysctl-get"); 442 } 443 lim = buf + needed; 444 if (verbose) 445 (void)printf("Examining routing table from sysctl\n"); 446 seqno = 0; /* ??? */ 447 for (next = buf; next < lim; next += rtm->rtm_msglen) { 448 rtm = (struct rt_msghdr *)(void *)next; 449 if (verbose) 450 print_rtmsg(rtm, rtm->rtm_msglen); 451 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 452 continue; 453 if (af != 0) { 454 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 455 456 if (sa->sa_family != af) 457 continue; 458 } 459 if (debugonly) 460 continue; 461 rtm->rtm_type = RTM_DELETE; 462 rtm->rtm_seq = seqno; 463 rlen = write(s, next, rtm->rtm_msglen); 464 if (rlen < 0 && errno == EPERM) 465 err(1, "write to routing socket"); 466 if (rlen < (int)rtm->rtm_msglen) { 467 warn("write to routing socket"); 468 (void)printf("got only %d for rlen\n", rlen); 469 free(buf); 470 goto retry; 471 break; 472 } 473 seqno++; 474 if (qflag) 475 continue; 476 if (verbose) 477 print_rtmsg(rtm, rlen); 478 else { 479 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 480 481 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 482 routename(sa) : netname(sa)); 483 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 484 printf("%-20.20s ", routename(sa)); 485 if (fib >= 0) 486 printf("-fib %-3d ", fib); 487 printf("done\n"); 488 } 489 } 490 return (error); 491} 492 493static const char * 494routename(struct sockaddr *sa) 495{ 496 struct sockaddr_dl *sdl; 497 const char *cp; 498 static char line[NI_MAXHOST]; 499 static char domain[MAXHOSTNAMELEN + 1]; 500 static int first = 1; 501 int n; 502 503 if (first) { 504 first = 0; 505 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 506 (cp = strchr(domain, '.'))) { 507 domain[MAXHOSTNAMELEN] = '\0'; 508 (void)strcpy(domain, cp + 1); 509 } else 510 domain[0] = '\0'; 511 } 512 513 /* If the address is zero-filled, use "default". */ 514 if (sa->sa_len == 0 && nflag == 0) 515 return ("default"); 516#if defined(INET) || defined(INET6) 517 switch (sa->sa_family) { 518#ifdef INET 519 case AF_INET: 520 /* If the address is zero-filled, use "default". */ 521 if (nflag == 0 && 522 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 523 INADDR_ANY) 524 return("default"); 525 break; 526#endif 527#ifdef INET6 528 case AF_INET6: 529 /* If the address is zero-filled, use "default". */ 530 if (nflag == 0 && 531 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 532 return("default"); 533 break; 534#endif 535 } 536#endif 537 538 switch (sa->sa_family) { 539#if defined(INET) || defined(INET6) 540#ifdef INET 541 case AF_INET: 542#endif 543#ifdef INET6 544 case AF_INET6: 545#endif 546 { 547 struct sockaddr_storage ss; 548 int error; 549 char *p; 550 551 memset(&ss, 0, sizeof(ss)); 552 if (sa->sa_len == 0) 553 ss.ss_family = sa->sa_family; 554 else 555 memcpy(&ss, sa, sa->sa_len); 556 /* Expand sa->sa_len because it could be shortened. */ 557 if (sa->sa_family == AF_INET) 558 ss.ss_len = sizeof(struct sockaddr_in); 559 else if (sa->sa_family == AF_INET6) 560 ss.ss_len = sizeof(struct sockaddr_in6); 561 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 562 line, sizeof(line), NULL, 0, 563 (nflag == 0) ? 0 : NI_NUMERICHOST); 564 if (error) { 565 warnx("getnameinfo(): %s", gai_strerror(error)); 566 strncpy(line, "invalid", sizeof(line)); 567 } 568 569 /* Remove the domain part if any. */ 570 p = strchr(line, '.'); 571 if (p != NULL && strcmp(p + 1, domain) == 0) 572 *p = '\0'; 573 574 return (line); 575 break; 576 } 577#endif 578 case AF_APPLETALK: 579 (void)snprintf(line, sizeof(line), "atalk %s", 580 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 581 break; 582 583 case AF_LINK: 584 sdl = (struct sockaddr_dl *)(void *)sa; 585 586 if (sdl->sdl_nlen == 0 && 587 sdl->sdl_alen == 0 && 588 sdl->sdl_slen == 0) { 589 n = snprintf(line, sizeof(line), "link#%d", 590 sdl->sdl_index); 591 if (n > (int)sizeof(line)) 592 line[0] = '\0'; 593 return (line); 594 } else 595 return (link_ntoa(sdl)); 596 break; 597 598 default: 599 { 600 u_short *sp = (u_short *)(void *)sa; 601 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 602 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 603 char *cpe = line + sizeof(line); 604 605 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 606 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 607 cps += n; 608 else 609 *cps = '\0'; 610 break; 611 } 612 } 613 return (line); 614} 615 616/* 617 * Return the name of the network whose address is given. 618 * The address is assumed to be that of a net, not a host. 619 */ 620static const char * 621netname(struct sockaddr *sa) 622{ 623 struct sockaddr_dl *sdl; 624 static char line[MAXHOSTNAMELEN + 1]; 625 int n; 626#ifdef INET 627 struct netent *np = NULL; 628 const char *cp = NULL; 629 u_long i; 630#endif 631 632 switch (sa->sa_family) { 633#ifdef INET 634 case AF_INET: 635 { 636 struct in_addr in; 637 638 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 639 i = in.s_addr = ntohl(in.s_addr); 640 if (in.s_addr == 0) 641 cp = "default"; 642 else if (!nflag) { 643 np = getnetbyaddr(i, AF_INET); 644 if (np != NULL) 645 cp = np->n_name; 646 } 647#define C(x) (unsigned)((x) & 0xff) 648 if (cp != NULL) 649 strncpy(line, cp, sizeof(line)); 650 else if ((in.s_addr & 0xffffff) == 0) 651 (void)sprintf(line, "%u", C(in.s_addr >> 24)); 652 else if ((in.s_addr & 0xffff) == 0) 653 (void)sprintf(line, "%u.%u", C(in.s_addr >> 24), 654 C(in.s_addr >> 16)); 655 else if ((in.s_addr & 0xff) == 0) 656 (void)sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 657 C(in.s_addr >> 16), C(in.s_addr >> 8)); 658 else 659 (void)sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 660 C(in.s_addr >> 16), C(in.s_addr >> 8), 661 C(in.s_addr)); 662#undef C 663 break; 664 } 665#endif 666#ifdef INET6 667 case AF_INET6: 668 { 669 struct sockaddr_in6 sin6; 670 int niflags = 0; 671 672 memset(&sin6, 0, sizeof(sin6)); 673 memcpy(&sin6, sa, sa->sa_len); 674 sin6.sin6_len = sizeof(sin6); 675 sin6.sin6_family = AF_INET6; 676 if (nflag) 677 niflags |= NI_NUMERICHOST; 678 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 679 line, sizeof(line), NULL, 0, niflags) != 0) 680 strncpy(line, "invalid", sizeof(line)); 681 682 return(line); 683 } 684#endif 685 686 case AF_APPLETALK: 687 (void)snprintf(line, sizeof(line), "atalk %s", 688 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 689 break; 690 691 case AF_LINK: 692 sdl = (struct sockaddr_dl *)(void *)sa; 693 694 if (sdl->sdl_nlen == 0 && 695 sdl->sdl_alen == 0 && 696 sdl->sdl_slen == 0) { 697 n = snprintf(line, sizeof(line), "link#%d", 698 sdl->sdl_index); 699 if (n > (int)sizeof(line)) 700 line[0] = '\0'; 701 return (line); 702 } else 703 return (link_ntoa(sdl)); 704 break; 705 706 default: 707 { 708 u_short *sp = (u_short *)(void *)sa->sa_data; 709 u_short *splim = sp + ((sa->sa_len + 1)>>1); 710 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 711 char *cpe = line + sizeof(line); 712 713 while (sp < splim && cps < cpe) 714 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 715 cps += n; 716 else 717 *cps = '\0'; 718 break; 719 } 720 } 721 return (line); 722} 723 724static void 725set_metric(char *value, int key) 726{ 727 int flag = 0; 728 char *endptr; 729 u_long noval, *valp = &noval; 730 731 switch (key) { 732#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 733 caseof(K_MTU, RTV_MTU, rmx_mtu); 734 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 735 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 736 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 737 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 738 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 739 caseof(K_RTT, RTV_RTT, rmx_rtt); 740 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 741 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 742 } 743 rtm_inits |= flag; 744 if (lockrest || locking) 745 rt_metrics.rmx_locks |= flag; 746 if (locking) 747 locking = 0; 748 errno = 0; 749 *valp = strtol(value, &endptr, 0); 750 if (errno == 0 && *endptr != '\0') 751 errno = EINVAL; 752 if (errno) 753 err(EX_USAGE, "%s", value); 754 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 755 struct timespec ts; 756 757 clock_gettime(CLOCK_REALTIME_FAST, &ts); 758 *valp += ts.tv_sec; 759 } 760} 761 762#define F_ISHOST 0x01 763#define F_FORCENET 0x02 764#define F_FORCEHOST 0x04 765#define F_PROXY 0x08 766#define F_INTERFACE 0x10 767 768static void 769newroute(int argc, char **argv) 770{ 771 struct hostent *hp; 772 struct fibl *fl; 773 char *cmd; 774 const char *dest, *gateway, *errmsg; 775 int key, error, flags, nrflags, fibnum; 776 777 if (uid != 0 && !debugonly && !tflag) 778 errx(EX_NOPERM, "must be root to alter routing table"); 779 dest = NULL; 780 gateway = NULL; 781 flags = RTF_STATIC; 782 nrflags = 0; 783 hp = NULL; 784 TAILQ_INIT(&fibl_head); 785 786 cmd = argv[0]; 787 if (*cmd != 'g' && *cmd != 's') 788 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 789 while (--argc > 0) { 790 if (**(++argv)== '-') { 791 switch (key = keyword(1 + *argv)) { 792 case K_LINK: 793 af = AF_LINK; 794 aflen = sizeof(struct sockaddr_dl); 795 break; 796#ifdef INET 797 case K_INET: 798 af = AF_INET; 799 aflen = sizeof(struct sockaddr_in); 800 break; 801#endif 802#ifdef INET6 803 case K_INET6: 804 af = AF_INET6; 805 aflen = sizeof(struct sockaddr_in6); 806 break; 807#endif 808 case K_ATALK: 809 af = AF_APPLETALK; 810 aflen = sizeof(struct sockaddr_at); 811 break; 812 case K_SA: 813 af = PF_ROUTE; 814 aflen = sizeof(struct sockaddr_storage); 815 break; 816 case K_IFACE: 817 case K_INTERFACE: 818 nrflags |= F_INTERFACE; 819 break; 820 case K_NOSTATIC: 821 flags &= ~RTF_STATIC; 822 break; 823 case K_LOCK: 824 locking = 1; 825 break; 826 case K_LOCKREST: 827 lockrest = 1; 828 break; 829 case K_HOST: 830 nrflags |= F_FORCEHOST; 831 break; 832 case K_REJECT: 833 flags |= RTF_REJECT; 834 break; 835 case K_BLACKHOLE: 836 flags |= RTF_BLACKHOLE; 837 break; 838 case K_PROTO1: 839 flags |= RTF_PROTO1; 840 break; 841 case K_PROTO2: 842 flags |= RTF_PROTO2; 843 break; 844 case K_PROTO3: 845 flags |= RTF_PROTO3; 846 break; 847 case K_PROXY: 848 nrflags |= F_PROXY; 849 break; 850 case K_XRESOLVE: 851 flags |= RTF_XRESOLVE; 852 break; 853 case K_STATIC: 854 flags |= RTF_STATIC; 855 break; 856 case K_STICKY: 857 flags |= RTF_STICKY; 858 break; 859 case K_NOSTICK: 860 flags &= ~RTF_STICKY; 861 break; 862 case K_FIB: 863 if (!--argc) 864 usage(NULL); 865 error = fiboptlist_csv(*++argv, &fibl_head); 866 if (error) 867 errx(EX_USAGE, 868 "invalid fib number: %s", *argv); 869 break; 870 case K_IFA: 871 if (!--argc) 872 usage(NULL); 873 getaddr(RTAX_IFA, *++argv, 0, nrflags); 874 break; 875 case K_IFP: 876 if (!--argc) 877 usage(NULL); 878 getaddr(RTAX_IFP, *++argv, 0, nrflags); 879 break; 880 case K_GENMASK: 881 if (!--argc) 882 usage(NULL); 883 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 884 break; 885 case K_GATEWAY: 886 if (!--argc) 887 usage(NULL); 888 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 889 gateway = *argv; 890 break; 891 case K_DST: 892 if (!--argc) 893 usage(NULL); 894 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 895 nrflags |= F_ISHOST; 896 dest = *argv; 897 break; 898 case K_NETMASK: 899 if (!--argc) 900 usage(NULL); 901 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 902 /* FALLTHROUGH */ 903 case K_NET: 904 nrflags |= F_FORCENET; 905 break; 906 case K_PREFIXLEN: 907 if (!--argc) 908 usage(NULL); 909 if (prefixlen(*++argv) == -1) { 910 nrflags &= ~F_FORCENET; 911 nrflags |= F_ISHOST; 912 } else { 913 nrflags |= F_FORCENET; 914 nrflags &= ~F_ISHOST; 915 } 916 break; 917 case K_MTU: 918 case K_HOPCOUNT: 919 case K_EXPIRE: 920 case K_RECVPIPE: 921 case K_SENDPIPE: 922 case K_SSTHRESH: 923 case K_RTT: 924 case K_RTTVAR: 925 case K_WEIGHT: 926 if (!--argc) 927 usage(NULL); 928 set_metric(*++argv, key); 929 break; 930 default: 931 usage(1+*argv); 932 } 933 } else { 934 if ((rtm_addrs & RTA_DST) == 0) { 935 dest = *argv; 936 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 937 nrflags |= F_ISHOST; 938 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 939 gateway = *argv; 940 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 941 } else { 942 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 943 nrflags |= F_FORCENET; 944 } 945 } 946 } 947 948 if (so[RTAX_DST].ss_len == 0) { 949 warnx("destination parameter required"); 950 usage(NULL); 951 } 952 953 if (nrflags & F_FORCEHOST) { 954 nrflags |= F_ISHOST; 955#ifdef INET6 956 if (af == AF_INET6) { 957 rtm_addrs &= ~RTA_NETMASK; 958 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 959 } 960#endif 961 } 962 if (nrflags & F_FORCENET) 963 nrflags &= ~F_ISHOST; 964 flags |= RTF_UP; 965 if (nrflags & F_ISHOST) 966 flags |= RTF_HOST; 967 if ((nrflags & F_INTERFACE) == 0) 968 flags |= RTF_GATEWAY; 969 if (nrflags & F_PROXY) 970 flags |= RTF_ANNOUNCE; 971 if (dest == NULL) 972 dest = ""; 973 if (gateway == NULL) 974 gateway = ""; 975 976 if (TAILQ_EMPTY(&fibl_head)) { 977 error = fiboptlist_csv("default", &fibl_head); 978 if (error) 979 errx(EX_OSERR, "fiboptlist_csv failed."); 980 } 981 error = 0; 982 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 983 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 984 if (fl->fl_error) 985 fl->fl_errno = errno; 986 error += fl->fl_error; 987 } 988 if (*cmd == 'g' || *cmd == 's') 989 exit(error); 990 991 error = 0; 992 if (!qflag) { 993 fibnum = 0; 994 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 995 if (fl->fl_error == 0) 996 fibnum++; 997 } 998 if (fibnum > 0) { 999 int firstfib = 1; 1000 1001 printf("%s %s %s", cmd, 1002 (nrflags & F_ISHOST) ? "host" : "net", dest); 1003 if (*gateway) 1004 printf(": gateway %s", gateway); 1005 1006 if (numfibs > 1) { 1007 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1008 if (fl->fl_error == 0 1009 && fl->fl_num >= 0) { 1010 if (firstfib) { 1011 printf(" fib "); 1012 firstfib = 0; 1013 } 1014 printf("%d", fl->fl_num); 1015 if (fibnum-- > 1) 1016 printf(","); 1017 } 1018 } 1019 } 1020 printf("\n"); 1021 } 1022 1023 fibnum = 0; 1024 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1025 if (fl->fl_error != 0) { 1026 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1027 ? "host" : "net", dest); 1028 if (*gateway) 1029 printf(": gateway %s", gateway); 1030 1031 if (fl->fl_num >= 0) 1032 printf(" fib %d", fl->fl_num); 1033 1034 switch (fl->fl_errno) { 1035 case ESRCH: 1036 errmsg = "not in table"; 1037 break; 1038 case EBUSY: 1039 errmsg = "entry in use"; 1040 break; 1041 case ENOBUFS: 1042 errmsg = "not enough memory"; 1043 break; 1044 case EADDRINUSE: 1045 /* 1046 * handle recursion avoidance 1047 * in rt_setgate() 1048 */ 1049 errmsg = "gateway uses the same route"; 1050 break; 1051 case EEXIST: 1052 errmsg = "route already in table"; 1053 break; 1054 default: 1055 errmsg = strerror(fl->fl_errno); 1056 break; 1057 } 1058 printf(": %s\n", errmsg); 1059 error = 1; 1060 } 1061 } 1062 } 1063 exit(error); 1064} 1065 1066static int 1067newroute_fib(int fib, char *cmd, int flags) 1068{ 1069 int error; 1070 1071 error = set_sofib(fib); 1072 if (error) { 1073 warn("fib number %d is ignored", fib); 1074 return (error); 1075 } 1076 1077 error = rtmsg(*cmd, flags, fib); 1078 return (error); 1079} 1080 1081#ifdef INET 1082static void 1083inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1084 struct sockaddr_in *sin_mask, u_long bits) 1085{ 1086 u_long mask = 0; 1087 1088 rtm_addrs |= RTA_NETMASK; 1089 1090 /* 1091 * MSB of net should be meaningful. 0/0 is exception. 1092 */ 1093 if (net > 0) 1094 while ((net & 0xff000000) == 0) 1095 net <<= 8; 1096 1097 /* 1098 * If no /xx was specified we must calculate the 1099 * CIDR address. 1100 */ 1101 if ((bits == 0) && (net != 0)) { 1102 u_long i, j; 1103 1104 for(i = 0, j = 0xff; i < 4; i++) { 1105 if (net & j) { 1106 break; 1107 } 1108 j <<= 8; 1109 } 1110 /* i holds the first non zero bit */ 1111 bits = 32 - (i*8); 1112 } 1113 if (bits != 0) 1114 mask = 0xffffffff << (32 - bits); 1115 1116 sin->sin_addr.s_addr = htonl(net); 1117 sin_mask->sin_addr.s_addr = htonl(mask); 1118 sin_mask->sin_len = sizeof(struct sockaddr_in); 1119 sin_mask->sin_family = AF_INET; 1120} 1121#endif 1122 1123#ifdef INET6 1124/* 1125 * XXX the function may need more improvement... 1126 */ 1127static int 1128inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1129{ 1130 struct in6_addr in6; 1131 1132 if (plen == NULL) { 1133 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1134 sin6->sin6_scope_id == 0) { 1135 plen = "0"; 1136 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1137 /* aggregatable global unicast - RFC2374 */ 1138 memset(&in6, 0, sizeof(in6)); 1139 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1140 &in6.s6_addr[8], 8)) 1141 plen = "64"; 1142 } 1143 } 1144 1145 if (plen == NULL || strcmp(plen, "128") == 0) 1146 return (1); 1147 rtm_addrs |= RTA_NETMASK; 1148 prefixlen(plen); 1149 return (0); 1150} 1151#endif 1152 1153/* 1154 * Interpret an argument as a network address of some kind, 1155 * returning 1 if a host address, 0 if a network address. 1156 */ 1157static int 1158getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1159{ 1160 struct sockaddr *sa; 1161#if defined(INET) 1162 struct sockaddr_in *sin; 1163 struct hostent *hp; 1164 struct netent *np; 1165 u_long val; 1166 char *q; 1167#elif defined(INET6) 1168 char *q; 1169#endif 1170 1171 if (idx < 0 || idx >= RTAX_MAX) 1172 usage("internal error"); 1173 if (af == 0) { 1174#if defined(INET) 1175 af = AF_INET; 1176 aflen = sizeof(struct sockaddr_in); 1177#elif defined(INET6) 1178 af = AF_INET6; 1179 aflen = sizeof(struct sockaddr_in6); 1180#else 1181 af = AF_LINK; 1182 aflen = sizeof(struct sockaddr_dl); 1183#endif 1184 } 1185#ifndef INET 1186 hpp = NULL; 1187#endif 1188 rtm_addrs |= (1 << idx); 1189 sa = (struct sockaddr *)&so[idx]; 1190 sa->sa_family = af; 1191 sa->sa_len = aflen; 1192 1193 switch (idx) { 1194 case RTAX_GATEWAY: 1195 if (nrflags & F_INTERFACE) { 1196 struct ifaddrs *ifap, *ifa; 1197 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1198 struct sockaddr_dl *sdl = NULL; 1199 1200 if (getifaddrs(&ifap)) 1201 err(EX_OSERR, "getifaddrs"); 1202 1203 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1204 if (ifa->ifa_addr->sa_family != AF_LINK) 1205 continue; 1206 1207 if (strcmp(str, ifa->ifa_name) != 0) 1208 continue; 1209 1210 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1211 } 1212 /* If we found it, then use it */ 1213 if (sdl != NULL) { 1214 /* 1215 * Note that we need to copy before calling 1216 * freeifaddrs(). 1217 */ 1218 memcpy(sdl0, sdl, sdl->sdl_len); 1219 } 1220 freeifaddrs(ifap); 1221 if (sdl != NULL) 1222 return(1); 1223 } 1224 break; 1225 case RTAX_IFP: 1226 sa->sa_family = AF_LINK; 1227 break; 1228 } 1229 if (strcmp(str, "default") == 0) { 1230 /* 1231 * Default is net 0.0.0.0/0 1232 */ 1233 switch (idx) { 1234 case RTAX_DST: 1235 forcenet++; 1236 getaddr(RTAX_NETMASK, str, 0, nrflags); 1237 break; 1238 } 1239 return (0); 1240 } 1241 switch (sa->sa_family) { 1242#ifdef INET6 1243 case AF_INET6: 1244 { 1245 struct addrinfo hints, *res; 1246 int ecode; 1247 1248 q = NULL; 1249 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1250 *q = '\0'; 1251 memset(&hints, 0, sizeof(hints)); 1252 hints.ai_family = sa->sa_family; 1253 hints.ai_socktype = SOCK_DGRAM; 1254 ecode = getaddrinfo(str, NULL, &hints, &res); 1255 if (ecode != 0 || res->ai_family != AF_INET6 || 1256 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1257 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1258 memcpy(sa, res->ai_addr, res->ai_addrlen); 1259 freeaddrinfo(res); 1260 if (q != NULL) 1261 *q++ = '/'; 1262 if (idx == RTAX_DST) 1263 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1264 return (0); 1265 } 1266#endif /* INET6 */ 1267 1268 case AF_APPLETALK: 1269 { 1270 struct sockaddr_at *sat = (struct sockaddr_at *)(void *)sa; 1271 1272 if (!atalk_aton(str, &sat->sat_addr)) 1273 errx(EX_NOHOST, "bad address: %s", str); 1274 rtm_addrs |= RTA_NETMASK; 1275 return(forcehost || sat->sat_addr.s_node != 0); 1276 } 1277 case AF_LINK: 1278 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1279 return (1); 1280 1281 case PF_ROUTE: 1282 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1283 return (1); 1284#ifdef INET 1285 case AF_INET: 1286#endif 1287 default: 1288 break; 1289 } 1290 1291#ifdef INET 1292 sin = (struct sockaddr_in *)(void *)sa; 1293 if (hpp == NULL) 1294 hpp = &hp; 1295 *hpp = NULL; 1296 1297 q = strchr(str,'/'); 1298 if (q != NULL && idx == RTAX_DST) { 1299 *q = '\0'; 1300 if ((val = inet_network(str)) != INADDR_NONE) { 1301 inet_makenetandmask(val, sin, 1302 (struct sockaddr_in *)&so[RTAX_NETMASK], 1303 strtoul(q+1, 0, 0)); 1304 return (0); 1305 } 1306 *q = '/'; 1307 } 1308 if ((idx != RTAX_DST || forcenet == 0) && 1309 inet_aton(str, &sin->sin_addr)) { 1310 val = sin->sin_addr.s_addr; 1311 if (idx != RTAX_DST || forcehost || 1312 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1313 return (1); 1314 else { 1315 val = ntohl(val); 1316 goto netdone; 1317 } 1318 } 1319 if (idx == RTAX_DST && forcehost == 0 && 1320 ((val = inet_network(str)) != INADDR_NONE || 1321 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1322netdone: 1323 inet_makenetandmask(val, sin, 1324 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1325 return (0); 1326 } 1327 hp = gethostbyname(str); 1328 if (hp != NULL) { 1329 *hpp = hp; 1330 sin->sin_family = hp->h_addrtype; 1331 memmove((char *)&sin->sin_addr, hp->h_addr, 1332 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1333 return (1); 1334 } 1335#endif 1336 errx(EX_NOHOST, "bad address: %s", str); 1337} 1338 1339static int 1340prefixlen(const char *str) 1341{ 1342 int len = atoi(str), q, r; 1343 int max; 1344 char *p; 1345 1346 rtm_addrs |= RTA_NETMASK; 1347 switch (af) { 1348#ifdef INET6 1349 case AF_INET6: 1350 { 1351 struct sockaddr_in6 *sin6 = 1352 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1353 1354 max = 128; 1355 p = (char *)&sin6->sin6_addr; 1356 sin6->sin6_family = AF_INET6; 1357 sin6->sin6_len = sizeof(*sin6); 1358 break; 1359 } 1360#endif 1361#ifdef INET 1362 case AF_INET: 1363 { 1364 struct sockaddr_in *sin = 1365 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1366 1367 max = 32; 1368 p = (char *)&sin->sin_addr; 1369 sin->sin_family = AF_INET; 1370 sin->sin_len = sizeof(*sin); 1371 break; 1372 } 1373#endif 1374 default: 1375 errx(EX_OSERR, "prefixlen not supported in this af"); 1376 } 1377 1378 if (len < 0 || max < len) 1379 errx(EX_USAGE, "%s: invalid prefixlen", str); 1380 1381 q = len >> 3; 1382 r = len & 7; 1383 memset((void *)p, 0, max / 8); 1384 if (q > 0) 1385 memset((void *)p, 0xff, q); 1386 if (r > 0) 1387 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1388 if (len == max) 1389 return (-1); 1390 else 1391 return (len); 1392} 1393 1394static void 1395interfaces(void) 1396{ 1397 size_t needed; 1398 int mib[6]; 1399 char *buf, *lim, *next, count = 0; 1400 struct rt_msghdr *rtm; 1401 1402retry2: 1403 mib[0] = CTL_NET; 1404 mib[1] = PF_ROUTE; 1405 mib[2] = 0; /* protocol */ 1406 mib[3] = AF_UNSPEC; 1407 mib[4] = NET_RT_IFLIST; 1408 mib[5] = 0; /* no flags */ 1409 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1410 err(EX_OSERR, "route-sysctl-estimate"); 1411 if ((buf = malloc(needed)) == NULL) 1412 errx(EX_OSERR, "malloc failed"); 1413 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1414 if (errno == ENOMEM && count++ < 10) { 1415 warnx("Routing table grew, retrying"); 1416 sleep(1); 1417 free(buf); 1418 goto retry2; 1419 } 1420 err(EX_OSERR, "actual retrieval of interface table"); 1421 } 1422 lim = buf + needed; 1423 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1424 rtm = (struct rt_msghdr *)(void *)next; 1425 print_rtmsg(rtm, rtm->rtm_msglen); 1426 } 1427} 1428 1429static void 1430monitor(int argc, char *argv[]) 1431{ 1432 int n, fib, error; 1433 char msg[2048], *endptr; 1434 1435 fib = defaultfib; 1436 while (argc > 1) { 1437 argc--; 1438 argv++; 1439 if (**argv != '-') 1440 usage(*argv); 1441 switch (keyword(*argv + 1)) { 1442 case K_FIB: 1443 if (!--argc) 1444 usage(*argv); 1445 errno = 0; 1446 fib = strtol(*++argv, &endptr, 0); 1447 if (errno == 0) { 1448 if (*endptr != '\0' || 1449 fib < 0 || 1450 (numfibs != -1 && fib > numfibs - 1)) 1451 errno = EINVAL; 1452 } 1453 if (errno) 1454 errx(EX_USAGE, "invalid fib number: %s", *argv); 1455 break; 1456 default: 1457 usage(*argv); 1458 } 1459 } 1460 error = set_sofib(fib); 1461 if (error) 1462 errx(EX_USAGE, "invalid fib number: %d", fib); 1463 1464 verbose = 1; 1465 if (debugonly) { 1466 interfaces(); 1467 exit(0); 1468 } 1469 for (;;) { 1470 time_t now; 1471 n = read(s, msg, 2048); 1472 now = time(NULL); 1473 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1474 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1475 } 1476} 1477 1478static struct { 1479 struct rt_msghdr m_rtm; 1480 char m_space[512]; 1481} m_rtmsg; 1482 1483static int 1484rtmsg(int cmd, int flags, int fib) 1485{ 1486 static int seq; 1487 int rlen; 1488 char *cp = m_rtmsg.m_space; 1489 int l; 1490 1491#define NEXTADDR(w, u) \ 1492 if (rtm_addrs & (w)) { \ 1493 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1494 sizeof(long) : \ 1495 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1496 | (sizeof(long) - 1)); \ 1497 memmove(cp, (char *)&(u), l); \ 1498 cp += l; \ 1499 if (verbose) \ 1500 sodump((struct sockaddr *)&(u), #w); \ 1501 } 1502 1503 errno = 0; 1504 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1505 if (cmd == 'a') 1506 cmd = RTM_ADD; 1507 else if (cmd == 'c') 1508 cmd = RTM_CHANGE; 1509 else if (cmd == 'g' || cmd == 's') { 1510 cmd = RTM_GET; 1511 if (so[RTAX_IFP].ss_family == 0) { 1512 so[RTAX_IFP].ss_family = AF_LINK; 1513 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1514 rtm_addrs |= RTA_IFP; 1515 } 1516 } else 1517 cmd = RTM_DELETE; 1518#define rtm m_rtmsg.m_rtm 1519 rtm.rtm_type = cmd; 1520 rtm.rtm_flags = flags; 1521 rtm.rtm_version = RTM_VERSION; 1522 rtm.rtm_seq = ++seq; 1523 rtm.rtm_addrs = rtm_addrs; 1524 rtm.rtm_rmx = rt_metrics; 1525 rtm.rtm_inits = rtm_inits; 1526 1527 NEXTADDR(RTA_DST, so[RTAX_DST]); 1528 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1529 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1530 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1531 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1532 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1533 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1534 if (verbose) 1535 print_rtmsg(&rtm, l); 1536 if (debugonly) 1537 return (0); 1538 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1539 if (errno == EPERM) 1540 err(1, "writing to routing socket"); 1541 warn("writing to routing socket"); 1542 return (-1); 1543 } 1544 if (cmd == RTM_GET) { 1545 do { 1546 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1547 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1548 if (l < 0) 1549 warn("read from routing socket"); 1550 else 1551 print_getmsg(&rtm, l, fib); 1552 } 1553#undef rtm 1554 return (0); 1555} 1556 1557static const char *const msgtypes[] = { 1558 "", 1559 "RTM_ADD: Add Route", 1560 "RTM_DELETE: Delete Route", 1561 "RTM_CHANGE: Change Metrics or flags", 1562 "RTM_GET: Report Metrics", 1563 "RTM_LOSING: Kernel Suspects Partitioning", 1564 "RTM_REDIRECT: Told to use different route", 1565 "RTM_MISS: Lookup failed on this address", 1566 "RTM_LOCK: fix specified metrics", 1567 "RTM_OLDADD: caused by SIOCADDRT", 1568 "RTM_OLDDEL: caused by SIOCDELRT", 1569 "RTM_RESOLVE: Route created by cloning", 1570 "RTM_NEWADDR: address being added to iface", 1571 "RTM_DELADDR: address being removed from iface", 1572 "RTM_IFINFO: iface status change", 1573 "RTM_NEWMADDR: new multicast group membership on iface", 1574 "RTM_DELMADDR: multicast group membership removed from iface", 1575 "RTM_IFANNOUNCE: interface arrival/departure", 1576 "RTM_IEEE80211: IEEE 802.11 wireless event", 1577}; 1578 1579static const char metricnames[] = 1580 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1581 "\1mtu"; 1582static const char routeflags[] = 1583 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1584 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1585 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1586 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1587static const char ifnetflags[] = 1588 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1589 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1590 "\017LINK2\020MULTICAST"; 1591static const char addrnames[] = 1592 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1593 1594static const char errfmt[] = 1595 "\n%s: truncated route message, only %zu bytes left\n"; 1596 1597static void 1598print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1599{ 1600 struct if_msghdr *ifm; 1601 struct ifa_msghdr *ifam; 1602#ifdef RTM_NEWMADDR 1603 struct ifma_msghdr *ifmam; 1604#endif 1605 struct if_announcemsghdr *ifan; 1606 const char *state; 1607 1608 if (verbose == 0) 1609 return; 1610 if (rtm->rtm_version != RTM_VERSION) { 1611 (void)printf("routing message version %d not understood\n", 1612 rtm->rtm_version); 1613 return; 1614 } 1615 if (rtm->rtm_type < nitems(msgtypes)) 1616 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1617 else 1618 (void)printf("unknown type %d: ", rtm->rtm_type); 1619 (void)printf("len %d, ", rtm->rtm_msglen); 1620 1621#define REQUIRE(x) do { \ 1622 if (msglen < sizeof(x)) \ 1623 goto badlen; \ 1624 else \ 1625 msglen -= sizeof(x); \ 1626 } while (0) 1627 1628 switch (rtm->rtm_type) { 1629 case RTM_IFINFO: 1630 REQUIRE(struct if_msghdr); 1631 ifm = (struct if_msghdr *)rtm; 1632 (void)printf("if# %d, ", ifm->ifm_index); 1633 switch (ifm->ifm_data.ifi_link_state) { 1634 case LINK_STATE_DOWN: 1635 state = "down"; 1636 break; 1637 case LINK_STATE_UP: 1638 state = "up"; 1639 break; 1640 default: 1641 state = "unknown"; 1642 break; 1643 } 1644 (void)printf("link: %s, flags:", state); 1645 printb(ifm->ifm_flags, ifnetflags); 1646 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1647 break; 1648 case RTM_NEWADDR: 1649 case RTM_DELADDR: 1650 REQUIRE(struct ifa_msghdr); 1651 ifam = (struct ifa_msghdr *)rtm; 1652 (void)printf("metric %d, flags:", ifam->ifam_metric); 1653 printb(ifam->ifam_flags, routeflags); 1654 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1655 break; 1656#ifdef RTM_NEWMADDR 1657 case RTM_NEWMADDR: 1658 case RTM_DELMADDR: 1659 REQUIRE(struct ifma_msghdr); 1660 ifmam = (struct ifma_msghdr *)rtm; 1661 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1662 break; 1663#endif 1664 case RTM_IFANNOUNCE: 1665 REQUIRE(struct if_announcemsghdr); 1666 ifan = (struct if_announcemsghdr *)rtm; 1667 (void)printf("if# %d, what: ", ifan->ifan_index); 1668 switch (ifan->ifan_what) { 1669 case IFAN_ARRIVAL: 1670 (void)printf("arrival"); 1671 break; 1672 case IFAN_DEPARTURE: 1673 printf("departure"); 1674 break; 1675 default: 1676 printf("#%d", ifan->ifan_what); 1677 break; 1678 } 1679 printf("\n"); 1680 fflush(stdout); 1681 break; 1682 1683 default: 1684 printf("pid: %ld, seq %d, errno %d, flags:", 1685 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1686 printb(rtm->rtm_flags, routeflags); 1687 pmsg_common(rtm, msglen); 1688 } 1689 1690 return; 1691 1692badlen: 1693 (void)printf(errfmt, __func__, msglen); 1694#undef REQUIRE 1695} 1696 1697static void 1698print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1699{ 1700 struct sockaddr *sp[RTAX_MAX]; 1701 struct timespec ts; 1702 char *cp; 1703 int i; 1704 1705 memset(sp, 0, sizeof(sp)); 1706 (void)printf(" route to: %s\n", 1707 routename((struct sockaddr *)&so[RTAX_DST])); 1708 if (rtm->rtm_version != RTM_VERSION) { 1709 warnx("routing message version %d not understood", 1710 rtm->rtm_version); 1711 return; 1712 } 1713 if (rtm->rtm_msglen > msglen) { 1714 warnx("message length mismatch, in packet %d, returned %d", 1715 rtm->rtm_msglen, msglen); 1716 return; 1717 } 1718 if (rtm->rtm_errno) { 1719 errno = rtm->rtm_errno; 1720 warn("message indicates error %d", errno); 1721 return; 1722 } 1723 cp = ((char *)(rtm + 1)); 1724 for (i = 0; i < RTAX_MAX; i++) 1725 if (rtm->rtm_addrs & (1 << i)) { 1726 sp[i] = (struct sockaddr *)cp; 1727 cp += SA_SIZE((struct sockaddr *)cp); 1728 } 1729 if ((rtm->rtm_addrs & RTA_IFP) && 1730 (sp[RTAX_IFP]->sa_family != AF_LINK || 1731 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1732 sp[RTAX_IFP] = NULL; 1733 if (sp[RTAX_DST] && sp[RTAX_NETMASK]) 1734 sp[RTAX_NETMASK]->sa_family = sp[RTAX_DST]->sa_family; /* XXX */ 1735 if (sp[RTAX_DST]) 1736 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1737 if (sp[RTAX_NETMASK]) 1738 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1739 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1740 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1741 if (fib >= 0) 1742 (void)printf(" fib: %u\n", (unsigned int)fib); 1743 if (sp[RTAX_IFP]) 1744 (void)printf(" interface: %.*s\n", 1745 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1746 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1747 (void)printf(" flags: "); 1748 printb(rtm->rtm_flags, routeflags); 1749 1750#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1751#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1752 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1753 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1754 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1755 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1756 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1757 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1758 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1759 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1760 if (rtm->rtm_rmx.rmx_expire > 0) 1761 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1762 else 1763 ts.tv_sec = 0; 1764 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1765 lock(EXPIRE)); 1766#undef lock 1767#undef msec 1768#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1769 if (verbose) 1770 pmsg_common(rtm, msglen); 1771 else if (rtm->rtm_addrs &~ RTA_IGN) { 1772 (void)printf("sockaddrs: "); 1773 printb(rtm->rtm_addrs, addrnames); 1774 putchar('\n'); 1775 } 1776#undef RTA_IGN 1777} 1778 1779static void 1780pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1781{ 1782 1783 (void)printf("\nlocks: "); 1784 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1785 (void)printf(" inits: "); 1786 printb(rtm->rtm_inits, metricnames); 1787 if (msglen > sizeof(struct rt_msghdr)) 1788 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1789 msglen - sizeof(struct rt_msghdr)); 1790 else 1791 (void)fflush(stdout); 1792} 1793 1794static void 1795pmsg_addrs(char *cp, int addrs, size_t len) 1796{ 1797 struct sockaddr *sa; 1798 int i; 1799 1800 if (addrs == 0) { 1801 (void)putchar('\n'); 1802 return; 1803 } 1804 (void)printf("\nsockaddrs: "); 1805 printb(addrs, addrnames); 1806 putchar('\n'); 1807 for (i = 0; i < RTAX_MAX; i++) 1808 if (addrs & (1 << i)) { 1809 sa = (struct sockaddr *)cp; 1810 if (len == 0 || len < SA_SIZE(sa)) { 1811 (void)printf(errfmt, __func__, len); 1812 break; 1813 } 1814 (void)printf(" %s", routename(sa)); 1815 len -= SA_SIZE(sa); 1816 cp += SA_SIZE(sa); 1817 } 1818 (void)putchar('\n'); 1819 (void)fflush(stdout); 1820} 1821 1822static void 1823printb(int b, const char *str) 1824{ 1825 int i; 1826 int gotsome = 0; 1827 1828 if (b == 0) 1829 return; 1830 while ((i = *str++) != 0) { 1831 if (b & (1 << (i-1))) { 1832 if (gotsome == 0) 1833 i = '<'; 1834 else 1835 i = ','; 1836 putchar(i); 1837 gotsome = 1; 1838 for (; (i = *str) > 32; str++) 1839 putchar(i); 1840 } else 1841 while (*str > 32) 1842 str++; 1843 } 1844 if (gotsome) 1845 putchar('>'); 1846} 1847 1848int 1849keyword(const char *cp) 1850{ 1851 const struct keytab *kt = keywords; 1852 1853 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1854 kt++; 1855 return (kt->kt_i); 1856} 1857 1858static void 1859sodump(struct sockaddr *sa, const char *which) 1860{ 1861#ifdef INET6 1862 char nbuf[INET6_ADDRSTRLEN]; 1863#endif 1864 1865 switch (sa->sa_family) { 1866 case AF_LINK: 1867 (void)printf("%s: link %s; ", which, 1868 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1869 break; 1870#ifdef INET 1871 case AF_INET: 1872 (void)printf("%s: inet %s; ", which, 1873 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1874 break; 1875#endif 1876#ifdef INET6 1877 case AF_INET6: 1878 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1879 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1880 sizeof(nbuf))); 1881 break; 1882#endif 1883 case AF_APPLETALK: 1884 (void)printf("%s: atalk %s; ", which, 1885 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 1886 break; 1887 } 1888 (void)fflush(stdout); 1889} 1890 1891/* States*/ 1892#define VIRGIN 0 1893#define GOTONE 1 1894#define GOTTWO 2 1895/* Inputs */ 1896#define DIGIT (4*0) 1897#define END (4*1) 1898#define DELIM (4*2) 1899 1900static void 1901sockaddr(char *addr, struct sockaddr *sa, size_t size) 1902{ 1903 char *cp = (char *)sa; 1904 char *cplim = cp + size; 1905 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1906 1907 memset(cp, 0, size); 1908 cp++; 1909 do { 1910 if ((*addr >= '0') && (*addr <= '9')) { 1911 new = *addr - '0'; 1912 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1913 new = *addr - 'a' + 10; 1914 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1915 new = *addr - 'A' + 10; 1916 } else if (*addr == '\0') 1917 state |= END; 1918 else 1919 state |= DELIM; 1920 addr++; 1921 switch (state /* | INPUT */) { 1922 case GOTTWO | DIGIT: 1923 *cp++ = byte; /*FALLTHROUGH*/ 1924 case VIRGIN | DIGIT: 1925 state = GOTONE; byte = new; continue; 1926 case GOTONE | DIGIT: 1927 state = GOTTWO; byte = new + (byte << 4); continue; 1928 default: /* | DELIM */ 1929 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1930 case GOTONE | END: 1931 case GOTTWO | END: 1932 *cp++ = byte; /* FALLTHROUGH */ 1933 case VIRGIN | END: 1934 break; 1935 } 1936 break; 1937 } while (cp < cplim); 1938 sa->sa_len = cp - (char *)sa; 1939} 1940 1941static int 1942atalk_aton(const char *text, struct at_addr *addr) 1943{ 1944 u_int net, node; 1945 1946 if (sscanf(text, "%u.%u", &net, &node) != 2 1947 || net > 0xffff || node > 0xff) 1948 return(0); 1949 addr->s_net = htons(net); 1950 addr->s_node = node; 1951 return(1); 1952} 1953 1954static char * 1955atalk_ntoa(struct at_addr at) 1956{ 1957 static char buf[20]; 1958 1959 (void)snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1960 buf[sizeof(buf) - 1] = '\0'; 1961 return(buf); 1962} 1963