route.c revision 316042
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: stable/10/sbin/route/route.c 316042 2017-03-27 18:24:27Z ngie $"); 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} 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 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 [-46dnqtv] 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, "46nqdtv")) != -1) 158 switch(ch) { 159 case '4': 160#ifdef INET 161 af = AF_INET; 162 aflen = sizeof(struct sockaddr_in); 163#else 164 errx(1, "IPv4 support is not compiled in"); 165#endif 166 break; 167 case '6': 168#ifdef INET6 169 af = AF_INET6; 170 aflen = sizeof(struct sockaddr_in6); 171#else 172 errx(1, "IPv6 support is not compiled in"); 173#endif 174 break; 175 case 'n': 176 nflag = 1; 177 break; 178 case 'q': 179 qflag = 1; 180 break; 181 case 'v': 182 verbose = 1; 183 break; 184 case 't': 185 tflag = 1; 186 break; 187 case 'd': 188 debugonly = 1; 189 break; 190 case '?': 191 default: 192 usage(NULL); 193 } 194 argc -= optind; 195 argv += optind; 196 197 pid = getpid(); 198 uid = geteuid(); 199 if (tflag) 200 s = open(_PATH_DEVNULL, O_WRONLY, 0); 201 else 202 s = socket(PF_ROUTE, SOCK_RAW, 0); 203 if (s < 0) 204 err(EX_OSERR, "socket"); 205 206 len = sizeof(numfibs); 207 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 208 numfibs = -1; 209 210 len = sizeof(defaultfib); 211 if (numfibs != -1 && 212 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 213 0) == -1) 214 defaultfib = -1; 215 216 if (*argv != NULL) 217 switch (keyword(*argv)) { 218 case K_GET: 219 case K_SHOW: 220 uid = 0; 221 /* FALLTHROUGH */ 222 223 case K_CHANGE: 224 case K_ADD: 225 case K_DEL: 226 case K_DELETE: 227 newroute(argc, argv); 228 /* NOTREACHED */ 229 230 case K_MONITOR: 231 monitor(argc, argv); 232 /* NOTREACHED */ 233 234 case K_FLUSH: 235 flushroutes(argc, argv); 236 exit(0); 237 /* NOTREACHED */ 238 } 239 usage(*argv); 240 /* NOTREACHED */ 241} 242 243static int 244set_sofib(int fib) 245{ 246 247 if (fib < 0) 248 return (0); 249 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 250 sizeof(fib))); 251} 252 253static int 254fiboptlist_range(const char *arg, struct fibl_head_t *flh) 255{ 256 struct fibl *fl; 257 char *str0, *str, *token, *endptr; 258 int fib[2], i, error; 259 260 str0 = str = strdup(arg); 261 error = 0; 262 i = 0; 263 while ((token = strsep(&str, "-")) != NULL) { 264 switch (i) { 265 case 0: 266 case 1: 267 errno = 0; 268 fib[i] = strtol(token, &endptr, 0); 269 if (errno == 0) { 270 if (*endptr != '\0' || 271 fib[i] < 0 || 272 (numfibs != -1 && fib[i] > numfibs - 1)) 273 errno = EINVAL; 274 } 275 if (errno) 276 error = 1; 277 break; 278 default: 279 error = 1; 280 } 281 if (error) 282 goto fiboptlist_range_ret; 283 i++; 284 } 285 if (fib[0] >= fib[1]) { 286 error = 1; 287 goto fiboptlist_range_ret; 288 } 289 for (i = fib[0]; i <= fib[1]; i++) { 290 fl = calloc(1, sizeof(*fl)); 291 if (fl == NULL) { 292 error = 1; 293 goto fiboptlist_range_ret; 294 } 295 fl->fl_num = i; 296 TAILQ_INSERT_TAIL(flh, fl, fl_next); 297 } 298fiboptlist_range_ret: 299 free(str0); 300 return (error); 301} 302 303#define ALLSTRLEN 64 304static int 305fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 306{ 307 struct fibl *fl; 308 char *str0, *str, *token, *endptr; 309 int fib, error; 310 311 str0 = str = NULL; 312 if (strcmp("all", arg) == 0) { 313 str = calloc(1, ALLSTRLEN); 314 if (str == NULL) { 315 error = 1; 316 goto fiboptlist_csv_ret; 317 } 318 if (numfibs > 1) 319 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 320 else 321 snprintf(str, ALLSTRLEN - 1, "%d", 0); 322 } else if (strcmp("default", arg) == 0) { 323 str0 = str = calloc(1, ALLSTRLEN); 324 if (str == NULL) { 325 error = 1; 326 goto fiboptlist_csv_ret; 327 } 328 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 329 } else 330 str0 = str = strdup(arg); 331 332 error = 0; 333 while ((token = strsep(&str, ",")) != NULL) { 334 if (*token != '-' && strchr(token, '-') != NULL) { 335 error = fiboptlist_range(token, flh); 336 if (error) 337 goto fiboptlist_csv_ret; 338 } else { 339 errno = 0; 340 fib = strtol(token, &endptr, 0); 341 if (errno == 0) { 342 if (*endptr != '\0' || 343 fib < 0 || 344 (numfibs != -1 && fib > numfibs - 1)) 345 errno = EINVAL; 346 } 347 if (errno) { 348 error = 1; 349 goto fiboptlist_csv_ret; 350 } 351 fl = calloc(1, sizeof(*fl)); 352 if (fl == NULL) { 353 error = 1; 354 goto fiboptlist_csv_ret; 355 } 356 fl->fl_num = fib; 357 TAILQ_INSERT_TAIL(flh, fl, fl_next); 358 } 359 } 360fiboptlist_csv_ret: 361 if (str0 != NULL) 362 free(str0); 363 return (error); 364} 365 366/* 367 * Purge all entries in the routing tables not 368 * associated with network interfaces. 369 */ 370static void 371flushroutes(int argc, char *argv[]) 372{ 373 struct fibl *fl; 374 int error; 375 376 if (uid != 0 && !debugonly && !tflag) 377 errx(EX_NOPERM, "must be root to alter routing table"); 378 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 379 380 TAILQ_INIT(&fibl_head); 381 while (argc > 1) { 382 argc--; 383 argv++; 384 if (**argv != '-') 385 usage(*argv); 386 switch (keyword(*argv + 1)) { 387#ifdef INET 388 case K_4: 389 case K_INET: 390 af = AF_INET; 391 break; 392#endif 393#ifdef INET6 394 case K_6: 395 case K_INET6: 396 af = AF_INET6; 397 break; 398#endif 399 case K_ATALK: 400 af = AF_APPLETALK; 401 break; 402 case K_LINK: 403 af = AF_LINK; 404 break; 405 case K_FIB: 406 if (!--argc) 407 usage(*argv); 408 error = fiboptlist_csv(*++argv, &fibl_head); 409 if (error) 410 errx(EX_USAGE, "invalid fib number: %s", *argv); 411 break; 412 default: 413 usage(*argv); 414 } 415 } 416 if (TAILQ_EMPTY(&fibl_head)) { 417 error = fiboptlist_csv("default", &fibl_head); 418 if (error) 419 errx(EX_OSERR, "fiboptlist_csv failed."); 420 } 421 TAILQ_FOREACH(fl, &fibl_head, fl_next) 422 flushroutes_fib(fl->fl_num); 423} 424 425static int 426flushroutes_fib(int fib) 427{ 428 struct rt_msghdr *rtm; 429 size_t needed; 430 char *buf, *next, *lim; 431 int mib[7], rlen, seqno, count = 0; 432 int error; 433 434 error = set_sofib(fib); 435 if (error) { 436 warn("fib number %d is ignored", fib); 437 return (error); 438 } 439 440retry: 441 mib[0] = CTL_NET; 442 mib[1] = PF_ROUTE; 443 mib[2] = 0; /* protocol */ 444 mib[3] = AF_UNSPEC; 445 mib[4] = NET_RT_DUMP; 446 mib[5] = 0; /* no flags */ 447 mib[6] = fib; 448 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 449 err(EX_OSERR, "route-sysctl-estimate"); 450 if ((buf = malloc(needed)) == NULL) 451 errx(EX_OSERR, "malloc failed"); 452 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 453 if (errno == ENOMEM && count++ < 10) { 454 warnx("Routing table grew, retrying"); 455 sleep(1); 456 free(buf); 457 goto retry; 458 } 459 err(EX_OSERR, "route-sysctl-get"); 460 } 461 lim = buf + needed; 462 if (verbose) 463 (void)printf("Examining routing table from sysctl\n"); 464 seqno = 0; /* ??? */ 465 for (next = buf; next < lim; next += rtm->rtm_msglen) { 466 rtm = (struct rt_msghdr *)(void *)next; 467 if (verbose) 468 print_rtmsg(rtm, rtm->rtm_msglen); 469 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 470 continue; 471 if (af != 0) { 472 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 473 474 if (sa->sa_family != af) 475 continue; 476 } 477 if (debugonly) 478 continue; 479 rtm->rtm_type = RTM_DELETE; 480 rtm->rtm_seq = seqno; 481 rlen = write(s, next, rtm->rtm_msglen); 482 if (rlen < 0 && errno == EPERM) 483 err(1, "write to routing socket"); 484 if (rlen < (int)rtm->rtm_msglen) { 485 warn("write to routing socket"); 486 (void)printf("got only %d for rlen\n", rlen); 487 free(buf); 488 goto retry; 489 break; 490 } 491 seqno++; 492 if (qflag) 493 continue; 494 if (verbose) 495 print_rtmsg(rtm, rlen); 496 else { 497 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 498 499 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 500 routename(sa) : netname(sa)); 501 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 502 printf("%-20.20s ", routename(sa)); 503 if (fib >= 0) 504 printf("-fib %-3d ", fib); 505 printf("done\n"); 506 } 507 } 508 return (error); 509} 510 511static const char * 512routename(struct sockaddr *sa) 513{ 514 struct sockaddr_dl *sdl; 515 const char *cp; 516 static char line[NI_MAXHOST]; 517 static char domain[MAXHOSTNAMELEN + 1]; 518 static int first = 1, n; 519 520 if (first) { 521 first = 0; 522 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 523 (cp = strchr(domain, '.'))) { 524 domain[MAXHOSTNAMELEN] = '\0'; 525 (void)strcpy(domain, cp + 1); 526 } else 527 domain[0] = '\0'; 528 } 529 530 /* If the address is zero-filled, use "default". */ 531 if (sa->sa_len == 0 && nflag == 0) 532 return ("default"); 533#if defined(INET) || defined(INET6) 534 switch (sa->sa_family) { 535#ifdef INET 536 case AF_INET: 537 /* If the address is zero-filled, use "default". */ 538 if (nflag == 0 && 539 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 540 INADDR_ANY) 541 return("default"); 542 break; 543#endif 544#ifdef INET6 545 case AF_INET6: 546 /* If the address is zero-filled, use "default". */ 547 if (nflag == 0 && 548 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 549 return("default"); 550 break; 551#endif 552 } 553#endif 554 555 switch (sa->sa_family) { 556#if defined(INET) || defined(INET6) 557#ifdef INET 558 case AF_INET: 559#endif 560#ifdef INET6 561 case AF_INET6: 562#endif 563 { 564 struct sockaddr_storage ss; 565 int error; 566 char *p; 567 568 memset(&ss, 0, sizeof(ss)); 569 if (sa->sa_len == 0) 570 ss.ss_family = sa->sa_family; 571 else 572 memcpy(&ss, sa, sa->sa_len); 573 /* Expand sa->sa_len because it could be shortened. */ 574 if (sa->sa_family == AF_INET) 575 ss.ss_len = sizeof(struct sockaddr_in); 576 else if (sa->sa_family == AF_INET6) 577 ss.ss_len = sizeof(struct sockaddr_in6); 578 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 579 line, sizeof(line), NULL, 0, 580 (nflag == 0) ? 0 : NI_NUMERICHOST); 581 if (error) { 582 warnx("getnameinfo(): %s", gai_strerror(error)); 583 strncpy(line, "invalid", sizeof(line)); 584 } 585 586 /* Remove the domain part if any. */ 587 p = strchr(line, '.'); 588 if (p != NULL && strcmp(p + 1, domain) == 0) 589 *p = '\0'; 590 591 return (line); 592 break; 593 } 594#endif 595 case AF_APPLETALK: 596 (void)snprintf(line, sizeof(line), "atalk %s", 597 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 598 break; 599 600 case AF_LINK: 601 sdl = (struct sockaddr_dl *)(void *)sa; 602 603 if (sdl->sdl_nlen == 0 && 604 sdl->sdl_alen == 0 && 605 sdl->sdl_slen == 0) { 606 n = snprintf(line, sizeof(line), "link#%d", 607 sdl->sdl_index); 608 if (n > (int)sizeof(line)) 609 line[0] = '\0'; 610 return (line); 611 } else 612 return (link_ntoa(sdl)); 613 break; 614 615 default: 616 { 617 u_short *sp = (u_short *)(void *)sa; 618 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 619 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 620 char *cpe = line + sizeof(line); 621 622 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 623 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 624 cps += n; 625 else 626 *cps = '\0'; 627 break; 628 } 629 } 630 return (line); 631} 632 633/* 634 * Return the name of the network whose address is given. 635 * The address is assumed to be that of a net, not a host. 636 */ 637static const char * 638netname(struct sockaddr *sa) 639{ 640 struct sockaddr_dl *sdl; 641 static char line[MAXHOSTNAMELEN + 1]; 642 int n; 643#ifdef INET 644 struct netent *np = NULL; 645 const char *cp = NULL; 646 u_long i; 647#endif 648 649 switch (sa->sa_family) { 650#ifdef INET 651 case AF_INET: 652 { 653 struct in_addr in; 654 655 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 656 i = in.s_addr = ntohl(in.s_addr); 657 if (in.s_addr == 0) 658 cp = "default"; 659 else if (!nflag) { 660 np = getnetbyaddr(i, AF_INET); 661 if (np != NULL) 662 cp = np->n_name; 663 } 664#define C(x) (unsigned)((x) & 0xff) 665 if (cp != NULL) 666 strncpy(line, cp, sizeof(line)); 667 else if ((in.s_addr & 0xffffff) == 0) 668 (void)sprintf(line, "%u", C(in.s_addr >> 24)); 669 else if ((in.s_addr & 0xffff) == 0) 670 (void)sprintf(line, "%u.%u", C(in.s_addr >> 24), 671 C(in.s_addr >> 16)); 672 else if ((in.s_addr & 0xff) == 0) 673 (void)sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 674 C(in.s_addr >> 16), C(in.s_addr >> 8)); 675 else 676 (void)sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 677 C(in.s_addr >> 16), C(in.s_addr >> 8), 678 C(in.s_addr)); 679#undef C 680 break; 681 } 682#endif 683#ifdef INET6 684 case AF_INET6: 685 { 686 struct sockaddr_in6 sin6; 687 int niflags = 0; 688 689 memset(&sin6, 0, sizeof(sin6)); 690 memcpy(&sin6, sa, sa->sa_len); 691 sin6.sin6_len = sizeof(sin6); 692 sin6.sin6_family = AF_INET6; 693 if (nflag) 694 niflags |= NI_NUMERICHOST; 695 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 696 line, sizeof(line), NULL, 0, niflags) != 0) 697 strncpy(line, "invalid", sizeof(line)); 698 699 return(line); 700 } 701#endif 702 703 case AF_APPLETALK: 704 (void)snprintf(line, sizeof(line), "atalk %s", 705 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 706 break; 707 708 case AF_LINK: 709 sdl = (struct sockaddr_dl *)(void *)sa; 710 711 if (sdl->sdl_nlen == 0 && 712 sdl->sdl_alen == 0 && 713 sdl->sdl_slen == 0) { 714 n = snprintf(line, sizeof(line), "link#%d", 715 sdl->sdl_index); 716 if (n > (int)sizeof(line)) 717 line[0] = '\0'; 718 return (line); 719 } else 720 return (link_ntoa(sdl)); 721 break; 722 723 default: 724 { 725 u_short *sp = (u_short *)(void *)sa->sa_data; 726 u_short *splim = sp + ((sa->sa_len + 1)>>1); 727 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 728 char *cpe = line + sizeof(line); 729 730 while (sp < splim && cps < cpe) 731 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 732 cps += n; 733 else 734 *cps = '\0'; 735 break; 736 } 737 } 738 return (line); 739} 740 741static void 742set_metric(char *value, int key) 743{ 744 int flag = 0; 745 char *endptr; 746 u_long noval, *valp = &noval; 747 748 switch (key) { 749#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 750 caseof(K_MTU, RTV_MTU, rmx_mtu); 751 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 752 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 753 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 754 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 755 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 756 caseof(K_RTT, RTV_RTT, rmx_rtt); 757 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 758 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 759 } 760 rtm_inits |= flag; 761 if (lockrest || locking) 762 rt_metrics.rmx_locks |= flag; 763 if (locking) 764 locking = 0; 765 errno = 0; 766 *valp = strtol(value, &endptr, 0); 767 if (errno == 0 && *endptr != '\0') 768 errno = EINVAL; 769 if (errno) 770 err(EX_USAGE, "%s", value); 771 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 772 struct timespec ts; 773 774 clock_gettime(CLOCK_REALTIME_FAST, &ts); 775 *valp += ts.tv_sec; 776 } 777} 778 779#define F_ISHOST 0x01 780#define F_FORCENET 0x02 781#define F_FORCEHOST 0x04 782#define F_PROXY 0x08 783#define F_INTERFACE 0x10 784 785static void 786newroute(int argc, char **argv) 787{ 788 struct hostent *hp; 789 struct fibl *fl; 790 char *cmd; 791 const char *dest, *gateway, *errmsg; 792 int key, error, flags, nrflags, fibnum; 793 794 if (uid != 0 && !debugonly && !tflag) 795 errx(EX_NOPERM, "must be root to alter routing table"); 796 dest = NULL; 797 gateway = NULL; 798 flags = RTF_STATIC; 799 nrflags = 0; 800 hp = NULL; 801 TAILQ_INIT(&fibl_head); 802 803 cmd = argv[0]; 804 if (*cmd != 'g' && *cmd != 's') 805 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 806 while (--argc > 0) { 807 if (**(++argv)== '-') { 808 switch (key = keyword(1 + *argv)) { 809 case K_LINK: 810 af = AF_LINK; 811 aflen = sizeof(struct sockaddr_dl); 812 break; 813#ifdef INET 814 case K_4: 815 case K_INET: 816 af = AF_INET; 817 aflen = sizeof(struct sockaddr_in); 818 break; 819#endif 820#ifdef INET6 821 case K_6: 822 case K_INET6: 823 af = AF_INET6; 824 aflen = sizeof(struct sockaddr_in6); 825 break; 826#endif 827 case K_ATALK: 828 af = AF_APPLETALK; 829 aflen = sizeof(struct sockaddr_at); 830 break; 831 case K_SA: 832 af = PF_ROUTE; 833 aflen = sizeof(struct sockaddr_storage); 834 break; 835 case K_IFACE: 836 case K_INTERFACE: 837 nrflags |= F_INTERFACE; 838 break; 839 case K_NOSTATIC: 840 flags &= ~RTF_STATIC; 841 break; 842 case K_LOCK: 843 locking = 1; 844 break; 845 case K_LOCKREST: 846 lockrest = 1; 847 break; 848 case K_HOST: 849 nrflags |= F_FORCEHOST; 850 break; 851 case K_REJECT: 852 flags |= RTF_REJECT; 853 break; 854 case K_BLACKHOLE: 855 flags |= RTF_BLACKHOLE; 856 break; 857 case K_PROTO1: 858 flags |= RTF_PROTO1; 859 break; 860 case K_PROTO2: 861 flags |= RTF_PROTO2; 862 break; 863 case K_PROTO3: 864 flags |= RTF_PROTO3; 865 break; 866 case K_PROXY: 867 nrflags |= F_PROXY; 868 break; 869 case K_XRESOLVE: 870 flags |= RTF_XRESOLVE; 871 break; 872 case K_STATIC: 873 flags |= RTF_STATIC; 874 break; 875 case K_STICKY: 876 flags |= RTF_STICKY; 877 break; 878 case K_NOSTICK: 879 flags &= ~RTF_STICKY; 880 break; 881 case K_FIB: 882 if (!--argc) 883 usage(NULL); 884 error = fiboptlist_csv(*++argv, &fibl_head); 885 if (error) 886 errx(EX_USAGE, 887 "invalid fib number: %s", *argv); 888 break; 889 case K_IFA: 890 if (!--argc) 891 usage(NULL); 892 getaddr(RTAX_IFA, *++argv, 0, nrflags); 893 break; 894 case K_IFP: 895 if (!--argc) 896 usage(NULL); 897 getaddr(RTAX_IFP, *++argv, 0, nrflags); 898 break; 899 case K_GENMASK: 900 if (!--argc) 901 usage(NULL); 902 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 903 break; 904 case K_GATEWAY: 905 if (!--argc) 906 usage(NULL); 907 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 908 gateway = *argv; 909 break; 910 case K_DST: 911 if (!--argc) 912 usage(NULL); 913 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 914 nrflags |= F_ISHOST; 915 dest = *argv; 916 break; 917 case K_NETMASK: 918 if (!--argc) 919 usage(NULL); 920 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 921 /* FALLTHROUGH */ 922 case K_NET: 923 nrflags |= F_FORCENET; 924 break; 925 case K_PREFIXLEN: 926 if (!--argc) 927 usage(NULL); 928 if (prefixlen(*++argv) == -1) { 929 nrflags &= ~F_FORCENET; 930 nrflags |= F_ISHOST; 931 } else { 932 nrflags |= F_FORCENET; 933 nrflags &= ~F_ISHOST; 934 } 935 break; 936 case K_MTU: 937 case K_HOPCOUNT: 938 case K_EXPIRE: 939 case K_RECVPIPE: 940 case K_SENDPIPE: 941 case K_SSTHRESH: 942 case K_RTT: 943 case K_RTTVAR: 944 case K_WEIGHT: 945 if (!--argc) 946 usage(NULL); 947 set_metric(*++argv, key); 948 break; 949 default: 950 usage(1+*argv); 951 } 952 } else { 953 if ((rtm_addrs & RTA_DST) == 0) { 954 dest = *argv; 955 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 956 nrflags |= F_ISHOST; 957 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 958 gateway = *argv; 959 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 960 } else { 961 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 962 nrflags |= F_FORCENET; 963 } 964 } 965 } 966 967 if (so[RTAX_DST].ss_len == 0) { 968 warnx("destination parameter required"); 969 usage(NULL); 970 } 971 972 if (nrflags & F_FORCEHOST) { 973 nrflags |= F_ISHOST; 974#ifdef INET6 975 if (af == AF_INET6) { 976 rtm_addrs &= ~RTA_NETMASK; 977 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 978 } 979#endif 980 } 981 if (nrflags & F_FORCENET) 982 nrflags &= ~F_ISHOST; 983 flags |= RTF_UP; 984 if (nrflags & F_ISHOST) 985 flags |= RTF_HOST; 986 if ((nrflags & F_INTERFACE) == 0) 987 flags |= RTF_GATEWAY; 988 if (nrflags & F_PROXY) 989 flags |= RTF_ANNOUNCE; 990 if (dest == NULL) 991 dest = ""; 992 if (gateway == NULL) 993 gateway = ""; 994 995 if (TAILQ_EMPTY(&fibl_head)) { 996 error = fiboptlist_csv("default", &fibl_head); 997 if (error) 998 errx(EX_OSERR, "fiboptlist_csv failed."); 999 } 1000 error = 0; 1001 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1002 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1003 if (fl->fl_error) 1004 fl->fl_errno = errno; 1005 error += fl->fl_error; 1006 } 1007 if (*cmd == 'g' || *cmd == 's') 1008 exit(error); 1009 1010 error = 0; 1011 if (!qflag) { 1012 fibnum = 0; 1013 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1014 if (fl->fl_error == 0) 1015 fibnum++; 1016 } 1017 if (fibnum > 0) { 1018 int firstfib = 1; 1019 1020 printf("%s %s %s", cmd, 1021 (nrflags & F_ISHOST) ? "host" : "net", dest); 1022 if (*gateway) 1023 printf(": gateway %s", gateway); 1024 1025 if (numfibs > 1) { 1026 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1027 if (fl->fl_error == 0 1028 && fl->fl_num >= 0) { 1029 if (firstfib) { 1030 printf(" fib "); 1031 firstfib = 0; 1032 } 1033 printf("%d", fl->fl_num); 1034 if (fibnum-- > 1) 1035 printf(","); 1036 } 1037 } 1038 } 1039 printf("\n"); 1040 } 1041 1042 fibnum = 0; 1043 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1044 if (fl->fl_error != 0) { 1045 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1046 ? "host" : "net", dest); 1047 if (*gateway) 1048 printf(": gateway %s", gateway); 1049 1050 if (fl->fl_num >= 0) 1051 printf(" fib %d", fl->fl_num); 1052 1053 switch (fl->fl_errno) { 1054 case ESRCH: 1055 errmsg = "not in table"; 1056 break; 1057 case EBUSY: 1058 errmsg = "entry in use"; 1059 break; 1060 case ENOBUFS: 1061 errmsg = "not enough memory"; 1062 break; 1063 case EADDRINUSE: 1064 /* 1065 * handle recursion avoidance 1066 * in rt_setgate() 1067 */ 1068 errmsg = "gateway uses the same route"; 1069 break; 1070 case EEXIST: 1071 errmsg = "route already in table"; 1072 break; 1073 default: 1074 errmsg = strerror(fl->fl_errno); 1075 break; 1076 } 1077 printf(": %s\n", errmsg); 1078 error = 1; 1079 } 1080 } 1081 } 1082 exit(error); 1083} 1084 1085static int 1086newroute_fib(int fib, char *cmd, int flags) 1087{ 1088 int error; 1089 1090 error = set_sofib(fib); 1091 if (error) { 1092 warn("fib number %d is ignored", fib); 1093 return (error); 1094 } 1095 1096 error = rtmsg(*cmd, flags, fib); 1097 return (error); 1098} 1099 1100#ifdef INET 1101static void 1102inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1103 struct sockaddr_in *sin_mask, u_long bits) 1104{ 1105 u_long mask = 0; 1106 1107 rtm_addrs |= RTA_NETMASK; 1108 1109 /* 1110 * MSB of net should be meaningful. 0/0 is exception. 1111 */ 1112 if (net > 0) 1113 while ((net & 0xff000000) == 0) 1114 net <<= 8; 1115 1116 /* 1117 * If no /xx was specified we must calculate the 1118 * CIDR address. 1119 */ 1120 if ((bits == 0) && (net != 0)) { 1121 u_long i, j; 1122 1123 for(i = 0, j = 0xff; i < 4; i++) { 1124 if (net & j) { 1125 break; 1126 } 1127 j <<= 8; 1128 } 1129 /* i holds the first non zero bit */ 1130 bits = 32 - (i*8); 1131 } 1132 if (bits != 0) 1133 mask = 0xffffffff << (32 - bits); 1134 1135 sin->sin_addr.s_addr = htonl(net); 1136 sin_mask->sin_addr.s_addr = htonl(mask); 1137 sin_mask->sin_len = sizeof(struct sockaddr_in); 1138 sin_mask->sin_family = AF_INET; 1139} 1140#endif 1141 1142#ifdef INET6 1143/* 1144 * XXX the function may need more improvement... 1145 */ 1146static int 1147inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1148{ 1149 struct in6_addr in6; 1150 1151 if (plen == NULL) { 1152 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1153 sin6->sin6_scope_id == 0) { 1154 plen = "0"; 1155 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1156 /* aggregatable global unicast - RFC2374 */ 1157 memset(&in6, 0, sizeof(in6)); 1158 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1159 &in6.s6_addr[8], 8)) 1160 plen = "64"; 1161 } 1162 } 1163 1164 if (plen == NULL || strcmp(plen, "128") == 0) 1165 return (1); 1166 rtm_addrs |= RTA_NETMASK; 1167 prefixlen(plen); 1168 return (0); 1169} 1170#endif 1171 1172/* 1173 * Interpret an argument as a network address of some kind, 1174 * returning 1 if a host address, 0 if a network address. 1175 */ 1176static int 1177getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1178{ 1179 struct sockaddr *sa; 1180#if defined(INET) 1181 struct sockaddr_in *sin; 1182 struct hostent *hp; 1183 struct netent *np; 1184 u_long val; 1185 char *q; 1186#elif defined(INET6) 1187 char *q; 1188#endif 1189 1190 if (idx < 0 || idx >= RTAX_MAX) 1191 usage("internal error"); 1192 if (af == 0) { 1193#if defined(INET) 1194 af = AF_INET; 1195 aflen = sizeof(struct sockaddr_in); 1196#elif defined(INET6) 1197 af = AF_INET6; 1198 aflen = sizeof(struct sockaddr_in6); 1199#else 1200 af = AF_LINK; 1201 aflen = sizeof(struct sockaddr_dl); 1202#endif 1203 } 1204#ifndef INET 1205 hpp = NULL; 1206#endif 1207 rtm_addrs |= (1 << idx); 1208 sa = (struct sockaddr *)&so[idx]; 1209 sa->sa_family = af; 1210 sa->sa_len = aflen; 1211 1212 switch (idx) { 1213 case RTAX_GATEWAY: 1214 if (nrflags & F_INTERFACE) { 1215 struct ifaddrs *ifap, *ifa; 1216 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1217 struct sockaddr_dl *sdl = NULL; 1218 1219 if (getifaddrs(&ifap)) 1220 err(EX_OSERR, "getifaddrs"); 1221 1222 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1223 if (ifa->ifa_addr->sa_family != AF_LINK) 1224 continue; 1225 1226 if (strcmp(str, ifa->ifa_name) != 0) 1227 continue; 1228 1229 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1230 } 1231 /* If we found it, then use it */ 1232 if (sdl != NULL) { 1233 /* 1234 * Note that we need to copy before calling 1235 * freeifaddrs(). 1236 */ 1237 memcpy(sdl0, sdl, sdl->sdl_len); 1238 } 1239 freeifaddrs(ifap); 1240 if (sdl != NULL) 1241 return(1); 1242 else 1243 errx(EX_DATAERR, 1244 "interface '%s' does not exist", str); 1245 } 1246 break; 1247 case RTAX_IFP: 1248 sa->sa_family = AF_LINK; 1249 break; 1250 } 1251 if (strcmp(str, "default") == 0) { 1252 /* 1253 * Default is net 0.0.0.0/0 1254 */ 1255 switch (idx) { 1256 case RTAX_DST: 1257 nrflags |= F_FORCENET; 1258 getaddr(RTAX_NETMASK, str, 0, nrflags); 1259 break; 1260 } 1261 return (0); 1262 } 1263 switch (sa->sa_family) { 1264#ifdef INET6 1265 case AF_INET6: 1266 { 1267 struct addrinfo hints, *res; 1268 int ecode; 1269 1270 q = NULL; 1271 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1272 *q = '\0'; 1273 memset(&hints, 0, sizeof(hints)); 1274 hints.ai_family = sa->sa_family; 1275 hints.ai_socktype = SOCK_DGRAM; 1276 ecode = getaddrinfo(str, NULL, &hints, &res); 1277 if (ecode != 0 || res->ai_family != AF_INET6 || 1278 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1279 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1280 memcpy(sa, res->ai_addr, res->ai_addrlen); 1281 freeaddrinfo(res); 1282 if (q != NULL) 1283 *q++ = '/'; 1284 if (idx == RTAX_DST) 1285 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1286 return (0); 1287 } 1288#endif /* INET6 */ 1289 1290 case AF_APPLETALK: 1291 { 1292 struct sockaddr_at *sat = (struct sockaddr_at *)(void *)sa; 1293 1294 if (!atalk_aton(str, &sat->sat_addr)) 1295 errx(EX_NOHOST, "bad address: %s", str); 1296 rtm_addrs |= RTA_NETMASK; 1297 return(nrflags & F_FORCEHOST || sat->sat_addr.s_node != 0); 1298 } 1299 case AF_LINK: 1300 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1301 return (1); 1302 1303 case PF_ROUTE: 1304 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1305 return (1); 1306#ifdef INET 1307 case AF_INET: 1308#endif 1309 default: 1310 break; 1311 } 1312 1313#ifdef INET 1314 sin = (struct sockaddr_in *)(void *)sa; 1315 if (hpp == NULL) 1316 hpp = &hp; 1317 *hpp = NULL; 1318 1319 q = strchr(str,'/'); 1320 if (q != NULL && idx == RTAX_DST) { 1321 *q = '\0'; 1322 if ((val = inet_network(str)) != INADDR_NONE) { 1323 inet_makenetandmask(val, sin, 1324 (struct sockaddr_in *)&so[RTAX_NETMASK], 1325 strtoul(q+1, 0, 0)); 1326 return (0); 1327 } 1328 *q = '/'; 1329 } 1330 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1331 inet_aton(str, &sin->sin_addr)) { 1332 val = sin->sin_addr.s_addr; 1333 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1334 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1335 return (1); 1336 else { 1337 val = ntohl(val); 1338 goto netdone; 1339 } 1340 } 1341 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1342 ((val = inet_network(str)) != INADDR_NONE || 1343 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1344netdone: 1345 inet_makenetandmask(val, sin, 1346 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1347 return (0); 1348 } 1349 hp = gethostbyname(str); 1350 if (hp != NULL) { 1351 *hpp = hp; 1352 sin->sin_family = hp->h_addrtype; 1353 memmove((char *)&sin->sin_addr, hp->h_addr, 1354 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1355 return (1); 1356 } 1357#endif 1358 errx(EX_NOHOST, "bad address: %s", str); 1359} 1360 1361static int 1362prefixlen(const char *str) 1363{ 1364 int len = atoi(str), q, r; 1365 int max; 1366 char *p; 1367 1368 rtm_addrs |= RTA_NETMASK; 1369 switch (af) { 1370#ifdef INET6 1371 case AF_INET6: 1372 { 1373 struct sockaddr_in6 *sin6 = 1374 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1375 1376 max = 128; 1377 p = (char *)&sin6->sin6_addr; 1378 sin6->sin6_family = AF_INET6; 1379 sin6->sin6_len = sizeof(*sin6); 1380 break; 1381 } 1382#endif 1383#ifdef INET 1384 case AF_INET: 1385 { 1386 struct sockaddr_in *sin = 1387 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1388 1389 max = 32; 1390 p = (char *)&sin->sin_addr; 1391 sin->sin_family = AF_INET; 1392 sin->sin_len = sizeof(*sin); 1393 break; 1394 } 1395#endif 1396 default: 1397 errx(EX_OSERR, "prefixlen not supported in this af"); 1398 } 1399 1400 if (len < 0 || max < len) 1401 errx(EX_USAGE, "%s: invalid prefixlen", str); 1402 1403 q = len >> 3; 1404 r = len & 7; 1405 memset((void *)p, 0, max / 8); 1406 if (q > 0) 1407 memset((void *)p, 0xff, q); 1408 if (r > 0) 1409 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1410 if (len == max) 1411 return (-1); 1412 else 1413 return (len); 1414} 1415 1416static void 1417interfaces(void) 1418{ 1419 size_t needed; 1420 int mib[6]; 1421 char *buf, *lim, *next, count = 0; 1422 struct rt_msghdr *rtm; 1423 1424retry2: 1425 mib[0] = CTL_NET; 1426 mib[1] = PF_ROUTE; 1427 mib[2] = 0; /* protocol */ 1428 mib[3] = AF_UNSPEC; 1429 mib[4] = NET_RT_IFLIST; 1430 mib[5] = 0; /* no flags */ 1431 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1432 err(EX_OSERR, "route-sysctl-estimate"); 1433 if ((buf = malloc(needed)) == NULL) 1434 errx(EX_OSERR, "malloc failed"); 1435 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1436 if (errno == ENOMEM && count++ < 10) { 1437 warnx("Routing table grew, retrying"); 1438 sleep(1); 1439 free(buf); 1440 goto retry2; 1441 } 1442 err(EX_OSERR, "actual retrieval of interface table"); 1443 } 1444 lim = buf + needed; 1445 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1446 rtm = (struct rt_msghdr *)(void *)next; 1447 print_rtmsg(rtm, rtm->rtm_msglen); 1448 } 1449} 1450 1451static void 1452monitor(int argc, char *argv[]) 1453{ 1454 int n, fib, error; 1455 char msg[2048], *endptr; 1456 1457 fib = defaultfib; 1458 while (argc > 1) { 1459 argc--; 1460 argv++; 1461 if (**argv != '-') 1462 usage(*argv); 1463 switch (keyword(*argv + 1)) { 1464 case K_FIB: 1465 if (!--argc) 1466 usage(*argv); 1467 errno = 0; 1468 fib = strtol(*++argv, &endptr, 0); 1469 if (errno == 0) { 1470 if (*endptr != '\0' || 1471 fib < 0 || 1472 (numfibs != -1 && fib > numfibs - 1)) 1473 errno = EINVAL; 1474 } 1475 if (errno) 1476 errx(EX_USAGE, "invalid fib number: %s", *argv); 1477 break; 1478 default: 1479 usage(*argv); 1480 } 1481 } 1482 error = set_sofib(fib); 1483 if (error) 1484 errx(EX_USAGE, "invalid fib number: %d", fib); 1485 1486 verbose = 1; 1487 if (debugonly) { 1488 interfaces(); 1489 exit(0); 1490 } 1491 for (;;) { 1492 time_t now; 1493 n = read(s, msg, 2048); 1494 now = time(NULL); 1495 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1496 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1497 } 1498} 1499 1500static struct { 1501 struct rt_msghdr m_rtm; 1502 char m_space[512]; 1503} m_rtmsg; 1504 1505static int 1506rtmsg(int cmd, int flags, int fib) 1507{ 1508 static int seq; 1509 int rlen; 1510 char *cp = m_rtmsg.m_space; 1511 int l; 1512 1513#define NEXTADDR(w, u) \ 1514 if (rtm_addrs & (w)) { \ 1515 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1516 sizeof(long) : \ 1517 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1518 | (sizeof(long) - 1)); \ 1519 memmove(cp, (char *)&(u), l); \ 1520 cp += l; \ 1521 if (verbose) \ 1522 sodump((struct sockaddr *)&(u), #w); \ 1523 } 1524 1525 errno = 0; 1526 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1527 if (cmd == 'a') 1528 cmd = RTM_ADD; 1529 else if (cmd == 'c') 1530 cmd = RTM_CHANGE; 1531 else if (cmd == 'g' || cmd == 's') { 1532 cmd = RTM_GET; 1533 if (so[RTAX_IFP].ss_family == 0) { 1534 so[RTAX_IFP].ss_family = AF_LINK; 1535 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1536 rtm_addrs |= RTA_IFP; 1537 } 1538 } else 1539 cmd = RTM_DELETE; 1540#define rtm m_rtmsg.m_rtm 1541 rtm.rtm_type = cmd; 1542 rtm.rtm_flags = flags; 1543 rtm.rtm_version = RTM_VERSION; 1544 rtm.rtm_seq = ++seq; 1545 rtm.rtm_addrs = rtm_addrs; 1546 rtm.rtm_rmx = rt_metrics; 1547 rtm.rtm_inits = rtm_inits; 1548 1549 NEXTADDR(RTA_DST, so[RTAX_DST]); 1550 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1551 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1552 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1553 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1554 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1555 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1556 if (verbose) 1557 print_rtmsg(&rtm, l); 1558 if (debugonly) 1559 return (0); 1560 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1561 if (errno == EPERM) 1562 err(1, "writing to routing socket"); 1563 warn("writing to routing socket"); 1564 return (-1); 1565 } 1566 if (cmd == RTM_GET) { 1567 do { 1568 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1569 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1570 if (l < 0) 1571 warn("read from routing socket"); 1572 else 1573 print_getmsg(&rtm, l, fib); 1574 } 1575#undef rtm 1576 return (0); 1577} 1578 1579static const char *msgtypes[] = { 1580 "", 1581 "RTM_ADD: Add Route", 1582 "RTM_DELETE: Delete Route", 1583 "RTM_CHANGE: Change Metrics or flags", 1584 "RTM_GET: Report Metrics", 1585 "RTM_LOSING: Kernel Suspects Partitioning", 1586 "RTM_REDIRECT: Told to use different route", 1587 "RTM_MISS: Lookup failed on this address", 1588 "RTM_LOCK: fix specified metrics", 1589 "RTM_OLDADD: caused by SIOCADDRT", 1590 "RTM_OLDDEL: caused by SIOCDELRT", 1591 "RTM_RESOLVE: Route created by cloning", 1592 "RTM_NEWADDR: address being added to iface", 1593 "RTM_DELADDR: address being removed from iface", 1594 "RTM_IFINFO: iface status change", 1595 "RTM_NEWMADDR: new multicast group membership on iface", 1596 "RTM_DELMADDR: multicast group membership removed from iface", 1597 "RTM_IFANNOUNCE: interface arrival/departure", 1598 "RTM_IEEE80211: IEEE 802.11 wireless event", 1599}; 1600 1601static const char metricnames[] = 1602 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1603 "\1mtu"; 1604static const char routeflags[] = 1605 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1606 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1607 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1608 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1609static const char ifnetflags[] = 1610 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1611 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1612 "\017LINK2\020MULTICAST"; 1613static const char addrnames[] = 1614 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1615 1616static const char errfmt[] = 1617 "\n%s: truncated route message, only %zu bytes left\n"; 1618 1619static void 1620print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1621{ 1622 struct if_msghdr *ifm; 1623 struct ifa_msghdr *ifam; 1624#ifdef RTM_NEWMADDR 1625 struct ifma_msghdr *ifmam; 1626#endif 1627 struct if_announcemsghdr *ifan; 1628 const char *state; 1629 1630 if (verbose == 0) 1631 return; 1632 if (rtm->rtm_version != RTM_VERSION) { 1633 (void)printf("routing message version %d not understood\n", 1634 rtm->rtm_version); 1635 return; 1636 } 1637 if (rtm->rtm_type < nitems(msgtypes)) 1638 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1639 else 1640 (void)printf("unknown type %d: ", rtm->rtm_type); 1641 (void)printf("len %d, ", rtm->rtm_msglen); 1642 1643#define REQUIRE(x) do { \ 1644 if (msglen < sizeof(x)) \ 1645 goto badlen; \ 1646 else \ 1647 msglen -= sizeof(x); \ 1648 } while (0) 1649 1650 switch (rtm->rtm_type) { 1651 case RTM_IFINFO: 1652 REQUIRE(struct if_msghdr); 1653 ifm = (struct if_msghdr *)rtm; 1654 (void)printf("if# %d, ", ifm->ifm_index); 1655 switch (ifm->ifm_data.ifi_link_state) { 1656 case LINK_STATE_DOWN: 1657 state = "down"; 1658 break; 1659 case LINK_STATE_UP: 1660 state = "up"; 1661 break; 1662 default: 1663 state = "unknown"; 1664 break; 1665 } 1666 (void)printf("link: %s, flags:", state); 1667 printb(ifm->ifm_flags, ifnetflags); 1668 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1669 break; 1670 case RTM_NEWADDR: 1671 case RTM_DELADDR: 1672 REQUIRE(struct ifa_msghdr); 1673 ifam = (struct ifa_msghdr *)rtm; 1674 (void)printf("metric %d, flags:", ifam->ifam_metric); 1675 printb(ifam->ifam_flags, routeflags); 1676 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1677 break; 1678#ifdef RTM_NEWMADDR 1679 case RTM_NEWMADDR: 1680 case RTM_DELMADDR: 1681 REQUIRE(struct ifma_msghdr); 1682 ifmam = (struct ifma_msghdr *)rtm; 1683 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1684 break; 1685#endif 1686 case RTM_IFANNOUNCE: 1687 REQUIRE(struct if_announcemsghdr); 1688 ifan = (struct if_announcemsghdr *)rtm; 1689 (void)printf("if# %d, what: ", ifan->ifan_index); 1690 switch (ifan->ifan_what) { 1691 case IFAN_ARRIVAL: 1692 (void)printf("arrival"); 1693 break; 1694 case IFAN_DEPARTURE: 1695 printf("departure"); 1696 break; 1697 default: 1698 printf("#%d", ifan->ifan_what); 1699 break; 1700 } 1701 printf("\n"); 1702 fflush(stdout); 1703 break; 1704 1705 default: 1706 printf("pid: %ld, seq %d, errno %d, flags:", 1707 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1708 printb(rtm->rtm_flags, routeflags); 1709 pmsg_common(rtm, msglen); 1710 } 1711 1712 return; 1713 1714badlen: 1715 (void)printf(errfmt, __func__, msglen); 1716#undef REQUIRE 1717} 1718 1719static void 1720print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1721{ 1722 struct sockaddr *sp[RTAX_MAX]; 1723 struct timespec ts; 1724 char *cp; 1725 int i; 1726 1727 memset(sp, 0, sizeof(sp)); 1728 (void)printf(" route to: %s\n", 1729 routename((struct sockaddr *)&so[RTAX_DST])); 1730 if (rtm->rtm_version != RTM_VERSION) { 1731 warnx("routing message version %d not understood", 1732 rtm->rtm_version); 1733 return; 1734 } 1735 if (rtm->rtm_msglen > msglen) { 1736 warnx("message length mismatch, in packet %d, returned %d", 1737 rtm->rtm_msglen, msglen); 1738 return; 1739 } 1740 if (rtm->rtm_errno) { 1741 errno = rtm->rtm_errno; 1742 warn("message indicates error %d", errno); 1743 return; 1744 } 1745 cp = ((char *)(rtm + 1)); 1746 for (i = 0; i < RTAX_MAX; i++) 1747 if (rtm->rtm_addrs & (1 << i)) { 1748 sp[i] = (struct sockaddr *)cp; 1749 cp += SA_SIZE((struct sockaddr *)cp); 1750 } 1751 if ((rtm->rtm_addrs & RTA_IFP) && 1752 (sp[RTAX_IFP]->sa_family != AF_LINK || 1753 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1754 sp[RTAX_IFP] = NULL; 1755 if (sp[RTAX_DST] && sp[RTAX_NETMASK]) 1756 sp[RTAX_NETMASK]->sa_family = sp[RTAX_DST]->sa_family; /* XXX */ 1757 if (sp[RTAX_DST]) 1758 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1759 if (sp[RTAX_NETMASK]) 1760 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1761 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1762 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1763 if (fib >= 0) 1764 (void)printf(" fib: %u\n", (unsigned int)fib); 1765 if (sp[RTAX_IFP]) 1766 (void)printf(" interface: %.*s\n", 1767 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1768 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1769 (void)printf(" flags: "); 1770 printb(rtm->rtm_flags, routeflags); 1771 1772#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1773#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1774 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1775 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1776 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1777 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1778 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1779 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1780 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1781 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1782 if (rtm->rtm_rmx.rmx_expire > 0) 1783 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1784 else 1785 ts.tv_sec = 0; 1786 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1787 lock(EXPIRE)); 1788#undef lock 1789#undef msec 1790#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1791 if (verbose) 1792 pmsg_common(rtm, msglen); 1793 else if (rtm->rtm_addrs &~ RTA_IGN) { 1794 (void)printf("sockaddrs: "); 1795 printb(rtm->rtm_addrs, addrnames); 1796 putchar('\n'); 1797 } 1798#undef RTA_IGN 1799} 1800 1801static void 1802pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1803{ 1804 1805 (void)printf("\nlocks: "); 1806 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1807 (void)printf(" inits: "); 1808 printb(rtm->rtm_inits, metricnames); 1809 if (msglen > sizeof(struct rt_msghdr)) 1810 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1811 msglen - sizeof(struct rt_msghdr)); 1812 else 1813 (void)fflush(stdout); 1814} 1815 1816static void 1817pmsg_addrs(char *cp, int addrs, size_t len) 1818{ 1819 struct sockaddr *sa; 1820 int i; 1821 1822 if (addrs == 0) { 1823 (void)putchar('\n'); 1824 return; 1825 } 1826 (void)printf("\nsockaddrs: "); 1827 printb(addrs, addrnames); 1828 putchar('\n'); 1829 for (i = 0; i < RTAX_MAX; i++) 1830 if (addrs & (1 << i)) { 1831 sa = (struct sockaddr *)cp; 1832 if (len == 0 || len < SA_SIZE(sa)) { 1833 (void)printf(errfmt, __func__, len); 1834 break; 1835 } 1836 (void)printf(" %s", routename(sa)); 1837 len -= SA_SIZE(sa); 1838 cp += SA_SIZE(sa); 1839 } 1840 (void)putchar('\n'); 1841 (void)fflush(stdout); 1842} 1843 1844static void 1845printb(int b, const char *str) 1846{ 1847 int i; 1848 int gotsome = 0; 1849 1850 if (b == 0) 1851 return; 1852 while ((i = *str++) != 0) { 1853 if (b & (1 << (i-1))) { 1854 if (gotsome == 0) 1855 i = '<'; 1856 else 1857 i = ','; 1858 putchar(i); 1859 gotsome = 1; 1860 for (; (i = *str) > 32; str++) 1861 putchar(i); 1862 } else 1863 while (*str > 32) 1864 str++; 1865 } 1866 if (gotsome) 1867 putchar('>'); 1868} 1869 1870int 1871keyword(const char *cp) 1872{ 1873 struct keytab *kt = keywords; 1874 1875 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1876 kt++; 1877 return (kt->kt_i); 1878} 1879 1880static void 1881sodump(struct sockaddr *sa, const char *which) 1882{ 1883#ifdef INET6 1884 char nbuf[INET6_ADDRSTRLEN]; 1885#endif 1886 1887 switch (sa->sa_family) { 1888 case AF_LINK: 1889 (void)printf("%s: link %s; ", which, 1890 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1891 break; 1892#ifdef INET 1893 case AF_INET: 1894 (void)printf("%s: inet %s; ", which, 1895 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1896 break; 1897#endif 1898#ifdef INET6 1899 case AF_INET6: 1900 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1901 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1902 sizeof(nbuf))); 1903 break; 1904#endif 1905 case AF_APPLETALK: 1906 (void)printf("%s: atalk %s; ", which, 1907 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 1908 break; 1909 } 1910 (void)fflush(stdout); 1911} 1912 1913/* States*/ 1914#define VIRGIN 0 1915#define GOTONE 1 1916#define GOTTWO 2 1917/* Inputs */ 1918#define DIGIT (4*0) 1919#define END (4*1) 1920#define DELIM (4*2) 1921 1922static void 1923sockaddr(char *addr, struct sockaddr *sa, size_t size) 1924{ 1925 char *cp = (char *)sa; 1926 char *cplim = cp + size; 1927 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1928 1929 memset(cp, 0, size); 1930 cp++; 1931 do { 1932 if ((*addr >= '0') && (*addr <= '9')) { 1933 new = *addr - '0'; 1934 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1935 new = *addr - 'a' + 10; 1936 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1937 new = *addr - 'A' + 10; 1938 } else if (*addr == '\0') 1939 state |= END; 1940 else 1941 state |= DELIM; 1942 addr++; 1943 switch (state /* | INPUT */) { 1944 case GOTTWO | DIGIT: 1945 *cp++ = byte; /*FALLTHROUGH*/ 1946 case VIRGIN | DIGIT: 1947 state = GOTONE; byte = new; continue; 1948 case GOTONE | DIGIT: 1949 state = GOTTWO; byte = new + (byte << 4); continue; 1950 default: /* | DELIM */ 1951 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1952 case GOTONE | END: 1953 case GOTTWO | END: 1954 *cp++ = byte; /* FALLTHROUGH */ 1955 case VIRGIN | END: 1956 break; 1957 } 1958 break; 1959 } while (cp < cplim); 1960 sa->sa_len = cp - (char *)sa; 1961} 1962 1963static int 1964atalk_aton(const char *text, struct at_addr *addr) 1965{ 1966 u_int net, node; 1967 1968 if (sscanf(text, "%u.%u", &net, &node) != 2 1969 || net > 0xffff || node > 0xff) 1970 return(0); 1971 addr->s_net = htons(net); 1972 addr->s_node = node; 1973 return(1); 1974} 1975 1976static char * 1977atalk_ntoa(struct at_addr at) 1978{ 1979 static char buf[20]; 1980 1981 (void)snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1982 buf[sizeof(buf) - 1] = '\0'; 1983 return(buf); 1984} 1985