route.c revision 270050
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 270050 2014-08-16 13:47:04Z bz $"); 44 45#include <sys/param.h> 46#include <sys/file.h> 47#include <sys/socket.h> 48#include <sys/ioctl.h> 49#include <sys/sysctl.h> 50#include <sys/types.h> 51#include <sys/queue.h> 52 53#include <net/if.h> 54#include <net/route.h> 55#include <net/if_dl.h> 56#include <netinet/in.h> 57#include <netinet/if_ether.h> 58#include <netatalk/at.h> 59#include <arpa/inet.h> 60#include <netdb.h> 61 62#include <ctype.h> 63#include <err.h> 64#include <errno.h> 65#include <paths.h> 66#include <stdio.h> 67#include <stdlib.h> 68#include <string.h> 69#include <sysexits.h> 70#include <unistd.h> 71#include <ifaddrs.h> 72 73static struct keytab { 74 const char *kt_cp; 75 int kt_i; 76} keywords[] = { 77#include "keywords.h" 78 {0, 0} 79}; 80 81static struct sockaddr_storage so[RTAX_MAX]; 82static int pid, rtm_addrs; 83static int s; 84static int nflag, af, qflag, tflag; 85static int verbose, aflen; 86static int locking, lockrest, debugonly; 87static struct rt_metrics rt_metrics; 88static u_long rtm_inits; 89static uid_t uid; 90static int defaultfib; 91static int numfibs; 92 93static int atalk_aton(const char *, struct at_addr *); 94static char *atalk_ntoa(struct at_addr); 95static void printb(int, const char *); 96static void flushroutes(int argc, char *argv[]); 97static int flushroutes_fib(int); 98static int getaddr(int, char *, struct hostent **, int); 99static int keyword(const char *); 100#ifdef INET 101static void inet_makenetandmask(u_long, struct sockaddr_in *, 102 struct sockaddr_in *, u_long); 103#endif 104#ifdef INET6 105static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 106#endif 107static void interfaces(void); 108static void monitor(int, char*[]); 109static const char *netname(struct sockaddr *); 110static void newroute(int, char **); 111static int newroute_fib(int, char *, int); 112static void pmsg_addrs(char *, int, size_t); 113static void pmsg_common(struct rt_msghdr *, size_t); 114static int prefixlen(const char *); 115static void print_getmsg(struct rt_msghdr *, int, int); 116static void print_rtmsg(struct rt_msghdr *, size_t); 117static const char *routename(struct sockaddr *); 118static int rtmsg(int, int, int); 119static void set_metric(char *, int); 120static int set_sofib(int); 121static void sockaddr(char *, struct sockaddr *, size_t); 122static void sodump(struct sockaddr *, const char *); 123 124struct fibl { 125 TAILQ_ENTRY(fibl) fl_next; 126 127 int fl_num; 128 int fl_error; 129 int fl_errno; 130}; 131static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 132 133static int fiboptlist_csv(const char *, struct fibl_head_t *); 134static int fiboptlist_range(const char *, struct fibl_head_t *); 135 136static void usage(const char *) __dead2; 137 138static void 139usage(const char *cp) 140{ 141 if (cp != NULL) 142 warnx("bad keyword: %s", cp); 143 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 144 /* NOTREACHED */ 145} 146 147int 148main(int argc, char **argv) 149{ 150 int ch; 151 size_t len; 152 153 if (argc < 2) 154 usage(NULL); 155 156 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 157 switch(ch) { 158 case '4': 159#ifdef INET 160 af = AF_INET; 161 aflen = sizeof(struct sockaddr_in); 162#else 163 errx(1, "IPv4 support is not compiled in"); 164#endif 165 break; 166 case '6': 167#ifdef INET6 168 af = AF_INET6; 169 aflen = sizeof(struct sockaddr_in6); 170#else 171 errx(1, "IPv6 support is not compiled in"); 172#endif 173 break; 174 case 'n': 175 nflag = 1; 176 break; 177 case 'q': 178 qflag = 1; 179 break; 180 case 'v': 181 verbose = 1; 182 break; 183 case 't': 184 tflag = 1; 185 break; 186 case 'd': 187 debugonly = 1; 188 break; 189 case '?': 190 default: 191 usage(NULL); 192 } 193 argc -= optind; 194 argv += optind; 195 196 pid = getpid(); 197 uid = geteuid(); 198 if (tflag) 199 s = open(_PATH_DEVNULL, O_WRONLY, 0); 200 else 201 s = socket(PF_ROUTE, SOCK_RAW, 0); 202 if (s < 0) 203 err(EX_OSERR, "socket"); 204 205 len = sizeof(numfibs); 206 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 207 numfibs = -1; 208 209 len = sizeof(defaultfib); 210 if (numfibs != -1 && 211 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 212 0) == -1) 213 defaultfib = -1; 214 215 if (*argv != NULL) 216 switch (keyword(*argv)) { 217 case K_GET: 218 case K_SHOW: 219 uid = 0; 220 /* FALLTHROUGH */ 221 222 case K_CHANGE: 223 case K_ADD: 224 case K_DEL: 225 case K_DELETE: 226 newroute(argc, argv); 227 /* NOTREACHED */ 228 229 case K_MONITOR: 230 monitor(argc, argv); 231 /* NOTREACHED */ 232 233 case K_FLUSH: 234 flushroutes(argc, argv); 235 exit(0); 236 /* NOTREACHED */ 237 } 238 usage(*argv); 239 /* NOTREACHED */ 240} 241 242static int 243set_sofib(int fib) 244{ 245 246 if (fib < 0) 247 return (0); 248 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 249 sizeof(fib))); 250} 251 252static int 253fiboptlist_range(const char *arg, struct fibl_head_t *flh) 254{ 255 struct fibl *fl; 256 char *str0, *str, *token, *endptr; 257 int fib[2], i, error; 258 259 str0 = str = strdup(arg); 260 error = 0; 261 i = 0; 262 while ((token = strsep(&str, "-")) != NULL) { 263 switch (i) { 264 case 0: 265 case 1: 266 errno = 0; 267 fib[i] = strtol(token, &endptr, 0); 268 if (errno == 0) { 269 if (*endptr != '\0' || 270 fib[i] < 0 || 271 (numfibs != -1 && fib[i] > numfibs - 1)) 272 errno = EINVAL; 273 } 274 if (errno) 275 error = 1; 276 break; 277 default: 278 error = 1; 279 } 280 if (error) 281 goto fiboptlist_range_ret; 282 i++; 283 } 284 if (fib[0] >= fib[1]) { 285 error = 1; 286 goto fiboptlist_range_ret; 287 } 288 for (i = fib[0]; i <= fib[1]; i++) { 289 fl = calloc(1, sizeof(*fl)); 290 if (fl == NULL) { 291 error = 1; 292 goto fiboptlist_range_ret; 293 } 294 fl->fl_num = i; 295 TAILQ_INSERT_TAIL(flh, fl, fl_next); 296 } 297fiboptlist_range_ret: 298 free(str0); 299 return (error); 300} 301 302#define ALLSTRLEN 64 303static int 304fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 305{ 306 struct fibl *fl; 307 char *str0, *str, *token, *endptr; 308 int fib, error; 309 310 str0 = str = NULL; 311 if (strcmp("all", arg) == 0) { 312 str = calloc(1, ALLSTRLEN); 313 if (str == NULL) { 314 error = 1; 315 goto fiboptlist_csv_ret; 316 } 317 if (numfibs > 1) 318 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 319 else 320 snprintf(str, ALLSTRLEN - 1, "%d", 0); 321 } else if (strcmp("default", arg) == 0) { 322 str0 = str = calloc(1, ALLSTRLEN); 323 if (str == NULL) { 324 error = 1; 325 goto fiboptlist_csv_ret; 326 } 327 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 328 } else 329 str0 = str = strdup(arg); 330 331 error = 0; 332 while ((token = strsep(&str, ",")) != NULL) { 333 if (*token != '-' && strchr(token, '-') != NULL) { 334 error = fiboptlist_range(token, flh); 335 if (error) 336 goto fiboptlist_csv_ret; 337 } else { 338 errno = 0; 339 fib = strtol(token, &endptr, 0); 340 if (errno == 0) { 341 if (*endptr != '\0' || 342 fib < 0 || 343 (numfibs != -1 && fib > numfibs - 1)) 344 errno = EINVAL; 345 } 346 if (errno) { 347 error = 1; 348 goto fiboptlist_csv_ret; 349 } 350 fl = calloc(1, sizeof(*fl)); 351 if (fl == NULL) { 352 error = 1; 353 goto fiboptlist_csv_ret; 354 } 355 fl->fl_num = fib; 356 TAILQ_INSERT_TAIL(flh, fl, fl_next); 357 } 358 } 359fiboptlist_csv_ret: 360 if (str0 != NULL) 361 free(str0); 362 return (error); 363} 364 365/* 366 * Purge all entries in the routing tables not 367 * associated with network interfaces. 368 */ 369static void 370flushroutes(int argc, char *argv[]) 371{ 372 struct fibl *fl; 373 int error; 374 375 if (uid != 0 && !debugonly && !tflag) 376 errx(EX_NOPERM, "must be root to alter routing table"); 377 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 378 379 TAILQ_INIT(&fibl_head); 380 while (argc > 1) { 381 argc--; 382 argv++; 383 if (**argv != '-') 384 usage(*argv); 385 switch (keyword(*argv + 1)) { 386#ifdef INET 387 case K_4: 388 case K_INET: 389 af = AF_INET; 390 break; 391#endif 392#ifdef INET6 393 case K_6: 394 case K_INET6: 395 af = AF_INET6; 396 break; 397#endif 398 case K_ATALK: 399 af = AF_APPLETALK; 400 break; 401 case K_LINK: 402 af = AF_LINK; 403 break; 404 case K_FIB: 405 if (!--argc) 406 usage(*argv); 407 error = fiboptlist_csv(*++argv, &fibl_head); 408 if (error) 409 errx(EX_USAGE, "invalid fib number: %s", *argv); 410 break; 411 default: 412 usage(*argv); 413 } 414 } 415 if (TAILQ_EMPTY(&fibl_head)) { 416 error = fiboptlist_csv("default", &fibl_head); 417 if (error) 418 errx(EX_OSERR, "fiboptlist_csv failed."); 419 } 420 TAILQ_FOREACH(fl, &fibl_head, fl_next) 421 flushroutes_fib(fl->fl_num); 422} 423 424static int 425flushroutes_fib(int fib) 426{ 427 struct rt_msghdr *rtm; 428 size_t needed; 429 char *buf, *next, *lim; 430 int mib[7], rlen, seqno, count = 0; 431 int error; 432 433 error = set_sofib(fib); 434 if (error) { 435 warn("fib number %d is ignored", fib); 436 return (error); 437 } 438 439retry: 440 mib[0] = CTL_NET; 441 mib[1] = PF_ROUTE; 442 mib[2] = 0; /* protocol */ 443 mib[3] = AF_UNSPEC; 444 mib[4] = NET_RT_DUMP; 445 mib[5] = 0; /* no flags */ 446 mib[6] = fib; 447 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 448 err(EX_OSERR, "route-sysctl-estimate"); 449 if ((buf = malloc(needed)) == NULL) 450 errx(EX_OSERR, "malloc failed"); 451 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 452 if (errno == ENOMEM && count++ < 10) { 453 warnx("Routing table grew, retrying"); 454 sleep(1); 455 free(buf); 456 goto retry; 457 } 458 err(EX_OSERR, "route-sysctl-get"); 459 } 460 lim = buf + needed; 461 if (verbose) 462 (void)printf("Examining routing table from sysctl\n"); 463 seqno = 0; /* ??? */ 464 for (next = buf; next < lim; next += rtm->rtm_msglen) { 465 rtm = (struct rt_msghdr *)(void *)next; 466 if (verbose) 467 print_rtmsg(rtm, rtm->rtm_msglen); 468 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 469 continue; 470 if (af != 0) { 471 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 472 473 if (sa->sa_family != af) 474 continue; 475 } 476 if (debugonly) 477 continue; 478 rtm->rtm_type = RTM_DELETE; 479 rtm->rtm_seq = seqno; 480 rlen = write(s, next, rtm->rtm_msglen); 481 if (rlen < 0 && errno == EPERM) 482 err(1, "write to routing socket"); 483 if (rlen < (int)rtm->rtm_msglen) { 484 warn("write to routing socket"); 485 (void)printf("got only %d for rlen\n", rlen); 486 free(buf); 487 goto retry; 488 break; 489 } 490 seqno++; 491 if (qflag) 492 continue; 493 if (verbose) 494 print_rtmsg(rtm, rlen); 495 else { 496 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 497 498 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 499 routename(sa) : netname(sa)); 500 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 501 printf("%-20.20s ", routename(sa)); 502 if (fib >= 0) 503 printf("-fib %-3d ", fib); 504 printf("done\n"); 505 } 506 } 507 return (error); 508} 509 510static const char * 511routename(struct sockaddr *sa) 512{ 513 struct sockaddr_dl *sdl; 514 const char *cp; 515 static char line[NI_MAXHOST]; 516 static char domain[MAXHOSTNAMELEN + 1]; 517 static int first = 1, n; 518 519 if (first) { 520 first = 0; 521 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 522 (cp = strchr(domain, '.'))) { 523 domain[MAXHOSTNAMELEN] = '\0'; 524 (void)strcpy(domain, cp + 1); 525 } else 526 domain[0] = '\0'; 527 } 528 529 /* If the address is zero-filled, use "default". */ 530 if (sa->sa_len == 0 && nflag == 0) 531 return ("default"); 532#if defined(INET) || defined(INET6) 533 switch (sa->sa_family) { 534#ifdef INET 535 case AF_INET: 536 /* If the address is zero-filled, use "default". */ 537 if (nflag == 0 && 538 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 539 INADDR_ANY) 540 return("default"); 541 break; 542#endif 543#ifdef INET6 544 case AF_INET6: 545 /* If the address is zero-filled, use "default". */ 546 if (nflag == 0 && 547 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 548 return("default"); 549 break; 550#endif 551 } 552#endif 553 554 switch (sa->sa_family) { 555#if defined(INET) || defined(INET6) 556#ifdef INET 557 case AF_INET: 558#endif 559#ifdef INET6 560 case AF_INET6: 561#endif 562 { 563 struct sockaddr_storage ss; 564 int error; 565 char *p; 566 567 memset(&ss, 0, sizeof(ss)); 568 if (sa->sa_len == 0) 569 ss.ss_family = sa->sa_family; 570 else 571 memcpy(&ss, sa, sa->sa_len); 572 /* Expand sa->sa_len because it could be shortened. */ 573 if (sa->sa_family == AF_INET) 574 ss.ss_len = sizeof(struct sockaddr_in); 575 else if (sa->sa_family == AF_INET6) 576 ss.ss_len = sizeof(struct sockaddr_in6); 577 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 578 line, sizeof(line), NULL, 0, 579 (nflag == 0) ? 0 : NI_NUMERICHOST); 580 if (error) { 581 warnx("getnameinfo(): %s", gai_strerror(error)); 582 strncpy(line, "invalid", sizeof(line)); 583 } 584 585 /* Remove the domain part if any. */ 586 p = strchr(line, '.'); 587 if (p != NULL && strcmp(p + 1, domain) == 0) 588 *p = '\0'; 589 590 return (line); 591 break; 592 } 593#endif 594 case AF_APPLETALK: 595 (void)snprintf(line, sizeof(line), "atalk %s", 596 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 597 break; 598 599 case AF_LINK: 600 sdl = (struct sockaddr_dl *)(void *)sa; 601 602 if (sdl->sdl_nlen == 0 && 603 sdl->sdl_alen == 0 && 604 sdl->sdl_slen == 0) { 605 n = snprintf(line, sizeof(line), "link#%d", 606 sdl->sdl_index); 607 if (n > (int)sizeof(line)) 608 line[0] = '\0'; 609 return (line); 610 } else 611 return (link_ntoa(sdl)); 612 break; 613 614 default: 615 { 616 u_short *sp = (u_short *)(void *)sa; 617 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 618 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 619 char *cpe = line + sizeof(line); 620 621 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 622 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 623 cps += n; 624 else 625 *cps = '\0'; 626 break; 627 } 628 } 629 return (line); 630} 631 632/* 633 * Return the name of the network whose address is given. 634 * The address is assumed to be that of a net, not a host. 635 */ 636static const char * 637netname(struct sockaddr *sa) 638{ 639 struct sockaddr_dl *sdl; 640 static char line[MAXHOSTNAMELEN + 1]; 641 int n; 642#ifdef INET 643 struct netent *np = NULL; 644 const char *cp = NULL; 645 u_long i; 646#endif 647 648 switch (sa->sa_family) { 649#ifdef INET 650 case AF_INET: 651 { 652 struct in_addr in; 653 654 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 655 i = in.s_addr = ntohl(in.s_addr); 656 if (in.s_addr == 0) 657 cp = "default"; 658 else if (!nflag) { 659 np = getnetbyaddr(i, AF_INET); 660 if (np != NULL) 661 cp = np->n_name; 662 } 663#define C(x) (unsigned)((x) & 0xff) 664 if (cp != NULL) 665 strncpy(line, cp, sizeof(line)); 666 else if ((in.s_addr & 0xffffff) == 0) 667 (void)sprintf(line, "%u", C(in.s_addr >> 24)); 668 else if ((in.s_addr & 0xffff) == 0) 669 (void)sprintf(line, "%u.%u", C(in.s_addr >> 24), 670 C(in.s_addr >> 16)); 671 else if ((in.s_addr & 0xff) == 0) 672 (void)sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 673 C(in.s_addr >> 16), C(in.s_addr >> 8)); 674 else 675 (void)sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 676 C(in.s_addr >> 16), C(in.s_addr >> 8), 677 C(in.s_addr)); 678#undef C 679 break; 680 } 681#endif 682#ifdef INET6 683 case AF_INET6: 684 { 685 struct sockaddr_in6 sin6; 686 int niflags = 0; 687 688 memset(&sin6, 0, sizeof(sin6)); 689 memcpy(&sin6, sa, sa->sa_len); 690 sin6.sin6_len = sizeof(sin6); 691 sin6.sin6_family = AF_INET6; 692 if (nflag) 693 niflags |= NI_NUMERICHOST; 694 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 695 line, sizeof(line), NULL, 0, niflags) != 0) 696 strncpy(line, "invalid", sizeof(line)); 697 698 return(line); 699 } 700#endif 701 702 case AF_APPLETALK: 703 (void)snprintf(line, sizeof(line), "atalk %s", 704 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 705 break; 706 707 case AF_LINK: 708 sdl = (struct sockaddr_dl *)(void *)sa; 709 710 if (sdl->sdl_nlen == 0 && 711 sdl->sdl_alen == 0 && 712 sdl->sdl_slen == 0) { 713 n = snprintf(line, sizeof(line), "link#%d", 714 sdl->sdl_index); 715 if (n > (int)sizeof(line)) 716 line[0] = '\0'; 717 return (line); 718 } else 719 return (link_ntoa(sdl)); 720 break; 721 722 default: 723 { 724 u_short *sp = (u_short *)(void *)sa->sa_data; 725 u_short *splim = sp + ((sa->sa_len + 1)>>1); 726 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 727 char *cpe = line + sizeof(line); 728 729 while (sp < splim && cps < cpe) 730 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 731 cps += n; 732 else 733 *cps = '\0'; 734 break; 735 } 736 } 737 return (line); 738} 739 740static void 741set_metric(char *value, int key) 742{ 743 int flag = 0; 744 u_long noval, *valp = &noval; 745 746 switch (key) { 747#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 748 caseof(K_MTU, RTV_MTU, rmx_mtu); 749 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 750 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 751 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 752 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 753 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 754 caseof(K_RTT, RTV_RTT, rmx_rtt); 755 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 756 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 757 } 758 rtm_inits |= flag; 759 if (lockrest || locking) 760 rt_metrics.rmx_locks |= flag; 761 if (locking) 762 locking = 0; 763 *valp = atoi(value); 764} 765 766#define F_ISHOST 0x01 767#define F_FORCENET 0x02 768#define F_FORCEHOST 0x04 769#define F_PROXY 0x08 770#define F_INTERFACE 0x10 771 772static void 773newroute(int argc, char **argv) 774{ 775 struct hostent *hp; 776 struct fibl *fl; 777 char *cmd; 778 const char *dest, *gateway, *errmsg; 779 int key, error, flags, nrflags, fibnum; 780 781 if (uid != 0 && !debugonly && !tflag) 782 errx(EX_NOPERM, "must be root to alter routing table"); 783 dest = NULL; 784 gateway = NULL; 785 flags = RTF_STATIC; 786 nrflags = 0; 787 hp = NULL; 788 TAILQ_INIT(&fibl_head); 789 790 cmd = argv[0]; 791 if (*cmd != 'g' && *cmd != 's') 792 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 793 while (--argc > 0) { 794 if (**(++argv)== '-') { 795 switch (key = keyword(1 + *argv)) { 796 case K_LINK: 797 af = AF_LINK; 798 aflen = sizeof(struct sockaddr_dl); 799 break; 800#ifdef INET 801 case K_4: 802 case K_INET: 803 af = AF_INET; 804 aflen = sizeof(struct sockaddr_in); 805 break; 806#endif 807#ifdef INET6 808 case K_6: 809 case K_INET6: 810 af = AF_INET6; 811 aflen = sizeof(struct sockaddr_in6); 812 break; 813#endif 814 case K_ATALK: 815 af = AF_APPLETALK; 816 aflen = sizeof(struct sockaddr_at); 817 break; 818 case K_SA: 819 af = PF_ROUTE; 820 aflen = sizeof(struct sockaddr_storage); 821 break; 822 case K_IFACE: 823 case K_INTERFACE: 824 nrflags |= F_INTERFACE; 825 break; 826 case K_NOSTATIC: 827 flags &= ~RTF_STATIC; 828 break; 829 case K_LOCK: 830 locking = 1; 831 break; 832 case K_LOCKREST: 833 lockrest = 1; 834 break; 835 case K_HOST: 836 nrflags |= F_FORCEHOST; 837 break; 838 case K_REJECT: 839 flags |= RTF_REJECT; 840 break; 841 case K_BLACKHOLE: 842 flags |= RTF_BLACKHOLE; 843 break; 844 case K_PROTO1: 845 flags |= RTF_PROTO1; 846 break; 847 case K_PROTO2: 848 flags |= RTF_PROTO2; 849 break; 850 case K_PROXY: 851 nrflags |= F_PROXY; 852 break; 853 case K_XRESOLVE: 854 flags |= RTF_XRESOLVE; 855 break; 856 case K_STATIC: 857 flags |= RTF_STATIC; 858 break; 859 case K_STICKY: 860 flags |= RTF_STICKY; 861 break; 862 case K_NOSTICK: 863 flags &= ~RTF_STICKY; 864 break; 865 case K_FIB: 866 if (!--argc) 867 usage(NULL); 868 error = fiboptlist_csv(*++argv, &fibl_head); 869 if (error) 870 errx(EX_USAGE, 871 "invalid fib number: %s", *argv); 872 break; 873 case K_IFA: 874 if (!--argc) 875 usage(NULL); 876 getaddr(RTAX_IFA, *++argv, 0, nrflags); 877 break; 878 case K_IFP: 879 if (!--argc) 880 usage(NULL); 881 getaddr(RTAX_IFP, *++argv, 0, nrflags); 882 break; 883 case K_GENMASK: 884 if (!--argc) 885 usage(NULL); 886 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 887 break; 888 case K_GATEWAY: 889 if (!--argc) 890 usage(NULL); 891 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 892 gateway = *argv; 893 break; 894 case K_DST: 895 if (!--argc) 896 usage(NULL); 897 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 898 nrflags |= F_ISHOST; 899 dest = *argv; 900 break; 901 case K_NETMASK: 902 if (!--argc) 903 usage(NULL); 904 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 905 /* FALLTHROUGH */ 906 case K_NET: 907 nrflags |= F_FORCENET; 908 break; 909 case K_PREFIXLEN: 910 if (!--argc) 911 usage(NULL); 912 if (prefixlen(*++argv) == -1) { 913 nrflags &= ~F_FORCENET; 914 nrflags |= F_ISHOST; 915 } else { 916 nrflags |= F_FORCENET; 917 nrflags &= ~F_ISHOST; 918 } 919 break; 920 case K_MTU: 921 case K_HOPCOUNT: 922 case K_EXPIRE: 923 case K_RECVPIPE: 924 case K_SENDPIPE: 925 case K_SSTHRESH: 926 case K_RTT: 927 case K_RTTVAR: 928 case K_WEIGHT: 929 if (!--argc) 930 usage(NULL); 931 set_metric(*++argv, key); 932 break; 933 default: 934 usage(1+*argv); 935 } 936 } else { 937 if ((rtm_addrs & RTA_DST) == 0) { 938 dest = *argv; 939 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 940 nrflags |= F_ISHOST; 941 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 942 gateway = *argv; 943 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 944 } else { 945 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 946 nrflags |= F_FORCENET; 947 } 948 } 949 } 950 951 if (so[RTAX_DST].ss_len == 0) { 952 warnx("destination parameter required"); 953 usage(NULL); 954 } 955 956 if (nrflags & F_FORCEHOST) { 957 nrflags |= F_ISHOST; 958#ifdef INET6 959 if (af == AF_INET6) { 960 rtm_addrs &= ~RTA_NETMASK; 961 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 962 } 963#endif 964 } 965 if (nrflags & F_FORCENET) 966 nrflags &= ~F_ISHOST; 967 flags |= RTF_UP; 968 if (nrflags & F_ISHOST) 969 flags |= RTF_HOST; 970 if ((nrflags & F_INTERFACE) == 0) 971 flags |= RTF_GATEWAY; 972 if (nrflags & F_PROXY) 973 flags |= RTF_ANNOUNCE; 974 if (dest == NULL) 975 dest = ""; 976 if (gateway == NULL) 977 gateway = ""; 978 979 if (TAILQ_EMPTY(&fibl_head)) { 980 error = fiboptlist_csv("default", &fibl_head); 981 if (error) 982 errx(EX_OSERR, "fiboptlist_csv failed."); 983 } 984 error = 0; 985 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 986 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 987 if (fl->fl_error) 988 fl->fl_errno = errno; 989 error += fl->fl_error; 990 } 991 if (*cmd == 'g' || *cmd == 's') 992 exit(error); 993 994 error = 0; 995 if (!qflag) { 996 fibnum = 0; 997 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 998 if (fl->fl_error == 0) 999 fibnum++; 1000 } 1001 if (fibnum > 0) { 1002 int firstfib = 1; 1003 1004 printf("%s %s %s", cmd, 1005 (nrflags & F_ISHOST) ? "host" : "net", dest); 1006 if (*gateway) 1007 printf(": gateway %s", gateway); 1008 1009 if (numfibs > 1) { 1010 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1011 if (fl->fl_error == 0 1012 && fl->fl_num >= 0) { 1013 if (firstfib) { 1014 printf(" fib "); 1015 firstfib = 0; 1016 } 1017 printf("%d", fl->fl_num); 1018 if (fibnum-- > 1) 1019 printf(","); 1020 } 1021 } 1022 } 1023 printf("\n"); 1024 } 1025 1026 fibnum = 0; 1027 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1028 if (fl->fl_error != 0) { 1029 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1030 ? "host" : "net", dest); 1031 if (*gateway) 1032 printf(": gateway %s", gateway); 1033 1034 if (fl->fl_num >= 0) 1035 printf(" fib %d", fl->fl_num); 1036 1037 switch (fl->fl_errno) { 1038 case ESRCH: 1039 errmsg = "not in table"; 1040 break; 1041 case EBUSY: 1042 errmsg = "entry in use"; 1043 break; 1044 case ENOBUFS: 1045 errmsg = "not enough memory"; 1046 break; 1047 case EADDRINUSE: 1048 /* 1049 * handle recursion avoidance 1050 * in rt_setgate() 1051 */ 1052 errmsg = "gateway uses the same route"; 1053 break; 1054 case EEXIST: 1055 errmsg = "route already in table"; 1056 break; 1057 default: 1058 errmsg = strerror(fl->fl_errno); 1059 break; 1060 } 1061 printf(": %s\n", errmsg); 1062 error = 1; 1063 } 1064 } 1065 } 1066 exit(error); 1067} 1068 1069static int 1070newroute_fib(int fib, char *cmd, int flags) 1071{ 1072 int error; 1073 1074 error = set_sofib(fib); 1075 if (error) { 1076 warn("fib number %d is ignored", fib); 1077 return (error); 1078 } 1079 1080 error = rtmsg(*cmd, flags, fib); 1081 return (error); 1082} 1083 1084#ifdef INET 1085static void 1086inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1087 struct sockaddr_in *sin_mask, u_long bits) 1088{ 1089 u_long mask = 0; 1090 1091 rtm_addrs |= RTA_NETMASK; 1092 1093 /* 1094 * MSB of net should be meaningful. 0/0 is exception. 1095 */ 1096 if (net > 0) 1097 while ((net & 0xff000000) == 0) 1098 net <<= 8; 1099 1100 /* 1101 * If no /xx was specified we must calculate the 1102 * CIDR address. 1103 */ 1104 if ((bits == 0) && (net != 0)) { 1105 u_long i, j; 1106 1107 for(i = 0, j = 0xff; i < 4; i++) { 1108 if (net & j) { 1109 break; 1110 } 1111 j <<= 8; 1112 } 1113 /* i holds the first non zero bit */ 1114 bits = 32 - (i*8); 1115 } 1116 if (bits != 0) 1117 mask = 0xffffffff << (32 - bits); 1118 1119 sin->sin_addr.s_addr = htonl(net); 1120 sin_mask->sin_addr.s_addr = htonl(mask); 1121 sin_mask->sin_len = sizeof(struct sockaddr_in); 1122 sin_mask->sin_family = AF_INET; 1123} 1124#endif 1125 1126#ifdef INET6 1127/* 1128 * XXX the function may need more improvement... 1129 */ 1130static int 1131inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1132{ 1133 struct in6_addr in6; 1134 1135 if (plen == NULL) { 1136 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1137 sin6->sin6_scope_id == 0) { 1138 plen = "0"; 1139 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1140 /* aggregatable global unicast - RFC2374 */ 1141 memset(&in6, 0, sizeof(in6)); 1142 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1143 &in6.s6_addr[8], 8)) 1144 plen = "64"; 1145 } 1146 } 1147 1148 if (plen == NULL || strcmp(plen, "128") == 0) 1149 return (1); 1150 rtm_addrs |= RTA_NETMASK; 1151 prefixlen(plen); 1152 return (0); 1153} 1154#endif 1155 1156/* 1157 * Interpret an argument as a network address of some kind, 1158 * returning 1 if a host address, 0 if a network address. 1159 */ 1160static int 1161getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1162{ 1163 struct sockaddr *sa; 1164#if defined(INET) 1165 struct sockaddr_in *sin; 1166 struct hostent *hp; 1167 struct netent *np; 1168 u_long val; 1169 char *q; 1170#elif defined(INET6) 1171 char *q; 1172#endif 1173 1174 if (idx < 0 || idx >= RTAX_MAX) 1175 usage("internal error"); 1176 if (af == 0) { 1177#if defined(INET) 1178 af = AF_INET; 1179 aflen = sizeof(struct sockaddr_in); 1180#elif defined(INET6) 1181 af = AF_INET6; 1182 aflen = sizeof(struct sockaddr_in6); 1183#else 1184 af = AF_LINK; 1185 aflen = sizeof(struct sockaddr_dl); 1186#endif 1187 } 1188#ifndef INET 1189 hpp = NULL; 1190#endif 1191 rtm_addrs |= (1 << idx); 1192 sa = (struct sockaddr *)&so[idx]; 1193 sa->sa_family = af; 1194 sa->sa_len = aflen; 1195 1196 switch (idx) { 1197 case RTAX_GATEWAY: 1198 if (nrflags & F_INTERFACE) { 1199 struct ifaddrs *ifap, *ifa; 1200 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1201 struct sockaddr_dl *sdl = NULL; 1202 1203 if (getifaddrs(&ifap)) 1204 err(EX_OSERR, "getifaddrs"); 1205 1206 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1207 if (ifa->ifa_addr->sa_family != AF_LINK) 1208 continue; 1209 1210 if (strcmp(str, ifa->ifa_name) != 0) 1211 continue; 1212 1213 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1214 } 1215 /* If we found it, then use it */ 1216 if (sdl != NULL) { 1217 /* 1218 * Note that we need to copy before calling 1219 * freeifaddrs(). 1220 */ 1221 memcpy(sdl0, sdl, sdl->sdl_len); 1222 } 1223 freeifaddrs(ifap); 1224 if (sdl != NULL) 1225 return(1); 1226 } 1227 break; 1228 case RTAX_IFP: 1229 sa->sa_family = AF_LINK; 1230 break; 1231 } 1232 if (strcmp(str, "default") == 0) { 1233 /* 1234 * Default is net 0.0.0.0/0 1235 */ 1236 switch (idx) { 1237 case RTAX_DST: 1238 nrflags |= F_FORCENET; 1239 getaddr(RTAX_NETMASK, str, 0, nrflags); 1240 break; 1241 } 1242 return (0); 1243 } 1244 switch (sa->sa_family) { 1245#ifdef INET6 1246 case AF_INET6: 1247 { 1248 struct addrinfo hints, *res; 1249 int ecode; 1250 1251 q = NULL; 1252 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1253 *q = '\0'; 1254 memset(&hints, 0, sizeof(hints)); 1255 hints.ai_family = sa->sa_family; 1256 hints.ai_socktype = SOCK_DGRAM; 1257 ecode = getaddrinfo(str, NULL, &hints, &res); 1258 if (ecode != 0 || res->ai_family != AF_INET6 || 1259 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1260 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1261 memcpy(sa, res->ai_addr, res->ai_addrlen); 1262 freeaddrinfo(res); 1263 if (q != NULL) 1264 *q++ = '/'; 1265 if (idx == RTAX_DST) 1266 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1267 return (0); 1268 } 1269#endif /* INET6 */ 1270 1271 case AF_APPLETALK: 1272 { 1273 struct sockaddr_at *sat = (struct sockaddr_at *)(void *)sa; 1274 1275 if (!atalk_aton(str, &sat->sat_addr)) 1276 errx(EX_NOHOST, "bad address: %s", str); 1277 rtm_addrs |= RTA_NETMASK; 1278 return(nrflags & F_FORCEHOST || sat->sat_addr.s_node != 0); 1279 } 1280 case AF_LINK: 1281 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1282 return (1); 1283 1284 case PF_ROUTE: 1285 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1286 return (1); 1287#ifdef INET 1288 case AF_INET: 1289#endif 1290 default: 1291 break; 1292 } 1293 1294#ifdef INET 1295 sin = (struct sockaddr_in *)(void *)sa; 1296 if (hpp == NULL) 1297 hpp = &hp; 1298 *hpp = NULL; 1299 1300 q = strchr(str,'/'); 1301 if (q != NULL && idx == RTAX_DST) { 1302 *q = '\0'; 1303 if ((val = inet_network(str)) != INADDR_NONE) { 1304 inet_makenetandmask(val, sin, 1305 (struct sockaddr_in *)&so[RTAX_NETMASK], 1306 strtoul(q+1, 0, 0)); 1307 return (0); 1308 } 1309 *q = '/'; 1310 } 1311 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1312 inet_aton(str, &sin->sin_addr)) { 1313 val = sin->sin_addr.s_addr; 1314 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1315 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1316 return (1); 1317 else { 1318 val = ntohl(val); 1319 goto netdone; 1320 } 1321 } 1322 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1323 ((val = inet_network(str)) != INADDR_NONE || 1324 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1325netdone: 1326 inet_makenetandmask(val, sin, 1327 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1328 return (0); 1329 } 1330 hp = gethostbyname(str); 1331 if (hp != NULL) { 1332 *hpp = hp; 1333 sin->sin_family = hp->h_addrtype; 1334 memmove((char *)&sin->sin_addr, hp->h_addr, 1335 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1336 return (1); 1337 } 1338#endif 1339 errx(EX_NOHOST, "bad address: %s", str); 1340} 1341 1342static int 1343prefixlen(const char *str) 1344{ 1345 int len = atoi(str), q, r; 1346 int max; 1347 char *p; 1348 1349 rtm_addrs |= RTA_NETMASK; 1350 switch (af) { 1351#ifdef INET6 1352 case AF_INET6: 1353 { 1354 struct sockaddr_in6 *sin6 = 1355 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1356 1357 max = 128; 1358 p = (char *)&sin6->sin6_addr; 1359 sin6->sin6_family = AF_INET6; 1360 sin6->sin6_len = sizeof(*sin6); 1361 break; 1362 } 1363#endif 1364#ifdef INET 1365 case AF_INET: 1366 { 1367 struct sockaddr_in *sin = 1368 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1369 1370 max = 32; 1371 p = (char *)&sin->sin_addr; 1372 sin->sin_family = AF_INET; 1373 sin->sin_len = sizeof(*sin); 1374 break; 1375 } 1376#endif 1377 default: 1378 errx(EX_OSERR, "prefixlen not supported in this af"); 1379 } 1380 1381 if (len < 0 || max < len) 1382 errx(EX_USAGE, "%s: invalid prefixlen", str); 1383 1384 q = len >> 3; 1385 r = len & 7; 1386 memset((void *)p, 0, max / 8); 1387 if (q > 0) 1388 memset((void *)p, 0xff, q); 1389 if (r > 0) 1390 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1391 if (len == max) 1392 return (-1); 1393 else 1394 return (len); 1395} 1396 1397static void 1398interfaces(void) 1399{ 1400 size_t needed; 1401 int mib[6]; 1402 char *buf, *lim, *next, count = 0; 1403 struct rt_msghdr *rtm; 1404 1405retry2: 1406 mib[0] = CTL_NET; 1407 mib[1] = PF_ROUTE; 1408 mib[2] = 0; /* protocol */ 1409 mib[3] = AF_UNSPEC; 1410 mib[4] = NET_RT_IFLIST; 1411 mib[5] = 0; /* no flags */ 1412 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1413 err(EX_OSERR, "route-sysctl-estimate"); 1414 if ((buf = malloc(needed)) == NULL) 1415 errx(EX_OSERR, "malloc failed"); 1416 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1417 if (errno == ENOMEM && count++ < 10) { 1418 warnx("Routing table grew, retrying"); 1419 sleep(1); 1420 free(buf); 1421 goto retry2; 1422 } 1423 err(EX_OSERR, "actual retrieval of interface table"); 1424 } 1425 lim = buf + needed; 1426 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1427 rtm = (struct rt_msghdr *)(void *)next; 1428 print_rtmsg(rtm, rtm->rtm_msglen); 1429 } 1430} 1431 1432static void 1433monitor(int argc, char *argv[]) 1434{ 1435 int n, fib, error; 1436 char msg[2048], *endptr; 1437 1438 fib = defaultfib; 1439 while (argc > 1) { 1440 argc--; 1441 argv++; 1442 if (**argv != '-') 1443 usage(*argv); 1444 switch (keyword(*argv + 1)) { 1445 case K_FIB: 1446 if (!--argc) 1447 usage(*argv); 1448 errno = 0; 1449 fib = strtol(*++argv, &endptr, 0); 1450 if (errno == 0) { 1451 if (*endptr != '\0' || 1452 fib < 0 || 1453 (numfibs != -1 && fib > numfibs - 1)) 1454 errno = EINVAL; 1455 } 1456 if (errno) 1457 errx(EX_USAGE, "invalid fib number: %s", *argv); 1458 break; 1459 default: 1460 usage(*argv); 1461 } 1462 } 1463 error = set_sofib(fib); 1464 if (error) 1465 errx(EX_USAGE, "invalid fib number: %d", fib); 1466 1467 verbose = 1; 1468 if (debugonly) { 1469 interfaces(); 1470 exit(0); 1471 } 1472 for (;;) { 1473 time_t now; 1474 n = read(s, msg, 2048); 1475 now = time(NULL); 1476 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1477 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1478 } 1479} 1480 1481static struct { 1482 struct rt_msghdr m_rtm; 1483 char m_space[512]; 1484} m_rtmsg; 1485 1486static int 1487rtmsg(int cmd, int flags, int fib) 1488{ 1489 static int seq; 1490 int rlen; 1491 char *cp = m_rtmsg.m_space; 1492 int l; 1493 1494#define NEXTADDR(w, u) \ 1495 if (rtm_addrs & (w)) { \ 1496 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1497 sizeof(long) : \ 1498 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1499 | (sizeof(long) - 1)); \ 1500 memmove(cp, (char *)&(u), l); \ 1501 cp += l; \ 1502 if (verbose) \ 1503 sodump((struct sockaddr *)&(u), #w); \ 1504 } 1505 1506 errno = 0; 1507 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1508 if (cmd == 'a') 1509 cmd = RTM_ADD; 1510 else if (cmd == 'c') 1511 cmd = RTM_CHANGE; 1512 else if (cmd == 'g' || cmd == 's') { 1513 cmd = RTM_GET; 1514 if (so[RTAX_IFP].ss_family == 0) { 1515 so[RTAX_IFP].ss_family = AF_LINK; 1516 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1517 rtm_addrs |= RTA_IFP; 1518 } 1519 } else 1520 cmd = RTM_DELETE; 1521#define rtm m_rtmsg.m_rtm 1522 rtm.rtm_type = cmd; 1523 rtm.rtm_flags = flags; 1524 rtm.rtm_version = RTM_VERSION; 1525 rtm.rtm_seq = ++seq; 1526 rtm.rtm_addrs = rtm_addrs; 1527 rtm.rtm_rmx = rt_metrics; 1528 rtm.rtm_inits = rtm_inits; 1529 1530 NEXTADDR(RTA_DST, so[RTAX_DST]); 1531 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1532 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1533 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1534 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1535 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1536 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1537 if (verbose) 1538 print_rtmsg(&rtm, l); 1539 if (debugonly) 1540 return (0); 1541 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1542 if (errno == EPERM) 1543 err(1, "writing to routing socket"); 1544 warn("writing to routing socket"); 1545 return (-1); 1546 } 1547 if (cmd == RTM_GET) { 1548 do { 1549 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1550 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1551 if (l < 0) 1552 warn("read from routing socket"); 1553 else 1554 print_getmsg(&rtm, l, fib); 1555 } 1556#undef rtm 1557 return (0); 1558} 1559 1560static const char *msgtypes[] = { 1561 "", 1562 "RTM_ADD: Add Route", 1563 "RTM_DELETE: Delete Route", 1564 "RTM_CHANGE: Change Metrics or flags", 1565 "RTM_GET: Report Metrics", 1566 "RTM_LOSING: Kernel Suspects Partitioning", 1567 "RTM_REDIRECT: Told to use different route", 1568 "RTM_MISS: Lookup failed on this address", 1569 "RTM_LOCK: fix specified metrics", 1570 "RTM_OLDADD: caused by SIOCADDRT", 1571 "RTM_OLDDEL: caused by SIOCDELRT", 1572 "RTM_RESOLVE: Route created by cloning", 1573 "RTM_NEWADDR: address being added to iface", 1574 "RTM_DELADDR: address being removed from iface", 1575 "RTM_IFINFO: iface status change", 1576 "RTM_NEWMADDR: new multicast group membership on iface", 1577 "RTM_DELMADDR: multicast group membership removed from iface", 1578 "RTM_IFANNOUNCE: interface arrival/departure", 1579 "RTM_IEEE80211: IEEE 802.11 wireless event", 1580}; 1581 1582static const char metricnames[] = 1583 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1584 "\1mtu"; 1585static const char routeflags[] = 1586 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1587 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1588 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1589 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1590static const char ifnetflags[] = 1591 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1592 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1593 "\017LINK2\020MULTICAST"; 1594static const char addrnames[] = 1595 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1596 1597static const char errfmt[] = 1598 "\n%s: truncated route message, only %zu bytes left\n"; 1599 1600static void 1601print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1602{ 1603 struct if_msghdr *ifm; 1604 struct ifa_msghdr *ifam; 1605#ifdef RTM_NEWMADDR 1606 struct ifma_msghdr *ifmam; 1607#endif 1608 struct if_announcemsghdr *ifan; 1609 const char *state; 1610 1611 if (verbose == 0) 1612 return; 1613 if (rtm->rtm_version != RTM_VERSION) { 1614 (void)printf("routing message version %d not understood\n", 1615 rtm->rtm_version); 1616 return; 1617 } 1618 if (rtm->rtm_type < nitems(msgtypes)) 1619 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1620 else 1621 (void)printf("unknown type %d: ", rtm->rtm_type); 1622 (void)printf("len %d, ", rtm->rtm_msglen); 1623 1624#define REQUIRE(x) do { \ 1625 if (msglen < sizeof(x)) \ 1626 goto badlen; \ 1627 else \ 1628 msglen -= sizeof(x); \ 1629 } while (0) 1630 1631 switch (rtm->rtm_type) { 1632 case RTM_IFINFO: 1633 REQUIRE(struct if_msghdr); 1634 ifm = (struct if_msghdr *)rtm; 1635 (void)printf("if# %d, ", ifm->ifm_index); 1636 switch (ifm->ifm_data.ifi_link_state) { 1637 case LINK_STATE_DOWN: 1638 state = "down"; 1639 break; 1640 case LINK_STATE_UP: 1641 state = "up"; 1642 break; 1643 default: 1644 state = "unknown"; 1645 break; 1646 } 1647 (void)printf("link: %s, flags:", state); 1648 printb(ifm->ifm_flags, ifnetflags); 1649 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1650 break; 1651 case RTM_NEWADDR: 1652 case RTM_DELADDR: 1653 REQUIRE(struct ifa_msghdr); 1654 ifam = (struct ifa_msghdr *)rtm; 1655 (void)printf("metric %d, flags:", ifam->ifam_metric); 1656 printb(ifam->ifam_flags, routeflags); 1657 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1658 break; 1659#ifdef RTM_NEWMADDR 1660 case RTM_NEWMADDR: 1661 case RTM_DELMADDR: 1662 REQUIRE(struct ifma_msghdr); 1663 ifmam = (struct ifma_msghdr *)rtm; 1664 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1665 break; 1666#endif 1667 case RTM_IFANNOUNCE: 1668 REQUIRE(struct if_announcemsghdr); 1669 ifan = (struct if_announcemsghdr *)rtm; 1670 (void)printf("if# %d, what: ", ifan->ifan_index); 1671 switch (ifan->ifan_what) { 1672 case IFAN_ARRIVAL: 1673 (void)printf("arrival"); 1674 break; 1675 case IFAN_DEPARTURE: 1676 printf("departure"); 1677 break; 1678 default: 1679 printf("#%d", ifan->ifan_what); 1680 break; 1681 } 1682 printf("\n"); 1683 fflush(stdout); 1684 break; 1685 1686 default: 1687 printf("pid: %ld, seq %d, errno %d, flags:", 1688 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1689 printb(rtm->rtm_flags, routeflags); 1690 pmsg_common(rtm, msglen); 1691 } 1692 1693 return; 1694 1695badlen: 1696 (void)printf(errfmt, __func__, msglen); 1697#undef REQUIRE 1698} 1699 1700static void 1701print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1702{ 1703 struct sockaddr *sp[RTAX_MAX]; 1704 char *cp; 1705 int i; 1706 1707 memset(sp, 0, sizeof(sp)); 1708 (void)printf(" route to: %s\n", 1709 routename((struct sockaddr *)&so[RTAX_DST])); 1710 if (rtm->rtm_version != RTM_VERSION) { 1711 warnx("routing message version %d not understood", 1712 rtm->rtm_version); 1713 return; 1714 } 1715 if (rtm->rtm_msglen > msglen) { 1716 warnx("message length mismatch, in packet %d, returned %d", 1717 rtm->rtm_msglen, msglen); 1718 return; 1719 } 1720 if (rtm->rtm_errno) { 1721 errno = rtm->rtm_errno; 1722 warn("message indicates error %d", errno); 1723 return; 1724 } 1725 cp = ((char *)(rtm + 1)); 1726 for (i = 0; i < RTAX_MAX; i++) 1727 if (rtm->rtm_addrs & (1 << i)) { 1728 sp[i] = (struct sockaddr *)cp; 1729 cp += SA_SIZE((struct sockaddr *)cp); 1730 } 1731 if ((rtm->rtm_addrs & RTA_IFP) && 1732 (sp[RTAX_IFP]->sa_family != AF_LINK || 1733 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1734 sp[RTAX_IFP] = NULL; 1735 if (sp[RTAX_DST] && sp[RTAX_NETMASK]) 1736 sp[RTAX_NETMASK]->sa_family = sp[RTAX_DST]->sa_family; /* XXX */ 1737 if (sp[RTAX_DST]) 1738 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1739 if (sp[RTAX_NETMASK]) 1740 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1741 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1742 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1743 if (fib >= 0) 1744 (void)printf(" fib: %u\n", (unsigned int)fib); 1745 if (sp[RTAX_IFP]) 1746 (void)printf(" interface: %.*s\n", 1747 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1748 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1749 (void)printf(" flags: "); 1750 printb(rtm->rtm_flags, routeflags); 1751 1752#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1753#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1754 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1755 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1756 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1757 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1758 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1759 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1760 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1761 printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1762 if (rtm->rtm_rmx.rmx_expire) 1763 rtm->rtm_rmx.rmx_expire -= time(0); 1764 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1765#undef lock 1766#undef msec 1767#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1768 if (verbose) 1769 pmsg_common(rtm, msglen); 1770 else if (rtm->rtm_addrs &~ RTA_IGN) { 1771 (void)printf("sockaddrs: "); 1772 printb(rtm->rtm_addrs, addrnames); 1773 putchar('\n'); 1774 } 1775#undef RTA_IGN 1776} 1777 1778static void 1779pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1780{ 1781 1782 (void)printf("\nlocks: "); 1783 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1784 (void)printf(" inits: "); 1785 printb(rtm->rtm_inits, metricnames); 1786 if (msglen > sizeof(struct rt_msghdr)) 1787 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1788 msglen - sizeof(struct rt_msghdr)); 1789 else 1790 (void)fflush(stdout); 1791} 1792 1793static void 1794pmsg_addrs(char *cp, int addrs, size_t len) 1795{ 1796 struct sockaddr *sa; 1797 int i; 1798 1799 if (addrs == 0) { 1800 (void)putchar('\n'); 1801 return; 1802 } 1803 (void)printf("\nsockaddrs: "); 1804 printb(addrs, addrnames); 1805 putchar('\n'); 1806 for (i = 0; i < RTAX_MAX; i++) 1807 if (addrs & (1 << i)) { 1808 sa = (struct sockaddr *)cp; 1809 if (len == 0 || len < SA_SIZE(sa)) { 1810 (void)printf(errfmt, __func__, len); 1811 break; 1812 } 1813 (void)printf(" %s", routename(sa)); 1814 len -= SA_SIZE(sa); 1815 cp += SA_SIZE(sa); 1816 } 1817 (void)putchar('\n'); 1818 (void)fflush(stdout); 1819} 1820 1821static void 1822printb(int b, const char *str) 1823{ 1824 int i; 1825 int gotsome = 0; 1826 1827 if (b == 0) 1828 return; 1829 while ((i = *str++) != 0) { 1830 if (b & (1 << (i-1))) { 1831 if (gotsome == 0) 1832 i = '<'; 1833 else 1834 i = ','; 1835 putchar(i); 1836 gotsome = 1; 1837 for (; (i = *str) > 32; str++) 1838 putchar(i); 1839 } else 1840 while (*str > 32) 1841 str++; 1842 } 1843 if (gotsome) 1844 putchar('>'); 1845} 1846 1847int 1848keyword(const char *cp) 1849{ 1850 struct keytab *kt = keywords; 1851 1852 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1853 kt++; 1854 return (kt->kt_i); 1855} 1856 1857static void 1858sodump(struct sockaddr *sa, const char *which) 1859{ 1860#ifdef INET6 1861 char nbuf[INET6_ADDRSTRLEN]; 1862#endif 1863 1864 switch (sa->sa_family) { 1865 case AF_LINK: 1866 (void)printf("%s: link %s; ", which, 1867 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1868 break; 1869#ifdef INET 1870 case AF_INET: 1871 (void)printf("%s: inet %s; ", which, 1872 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1873 break; 1874#endif 1875#ifdef INET6 1876 case AF_INET6: 1877 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1878 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1879 sizeof(nbuf))); 1880 break; 1881#endif 1882 case AF_APPLETALK: 1883 (void)printf("%s: atalk %s; ", which, 1884 atalk_ntoa(((struct sockaddr_at *)(void *)sa)->sat_addr)); 1885 break; 1886 } 1887 (void)fflush(stdout); 1888} 1889 1890/* States*/ 1891#define VIRGIN 0 1892#define GOTONE 1 1893#define GOTTWO 2 1894/* Inputs */ 1895#define DIGIT (4*0) 1896#define END (4*1) 1897#define DELIM (4*2) 1898 1899static void 1900sockaddr(char *addr, struct sockaddr *sa, size_t size) 1901{ 1902 char *cp = (char *)sa; 1903 char *cplim = cp + size; 1904 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1905 1906 memset(cp, 0, size); 1907 cp++; 1908 do { 1909 if ((*addr >= '0') && (*addr <= '9')) { 1910 new = *addr - '0'; 1911 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1912 new = *addr - 'a' + 10; 1913 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1914 new = *addr - 'A' + 10; 1915 } else if (*addr == '\0') 1916 state |= END; 1917 else 1918 state |= DELIM; 1919 addr++; 1920 switch (state /* | INPUT */) { 1921 case GOTTWO | DIGIT: 1922 *cp++ = byte; /*FALLTHROUGH*/ 1923 case VIRGIN | DIGIT: 1924 state = GOTONE; byte = new; continue; 1925 case GOTONE | DIGIT: 1926 state = GOTTWO; byte = new + (byte << 4); continue; 1927 default: /* | DELIM */ 1928 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1929 case GOTONE | END: 1930 case GOTTWO | END: 1931 *cp++ = byte; /* FALLTHROUGH */ 1932 case VIRGIN | END: 1933 break; 1934 } 1935 break; 1936 } while (cp < cplim); 1937 sa->sa_len = cp - (char *)sa; 1938} 1939 1940static int 1941atalk_aton(const char *text, struct at_addr *addr) 1942{ 1943 u_int net, node; 1944 1945 if (sscanf(text, "%u.%u", &net, &node) != 2 1946 || net > 0xffff || node > 0xff) 1947 return(0); 1948 addr->s_net = htons(net); 1949 addr->s_node = node; 1950 return(1); 1951} 1952 1953static char * 1954atalk_ntoa(struct at_addr at) 1955{ 1956 static char buf[20]; 1957 1958 (void)snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1959 buf[sizeof(buf) - 1] = '\0'; 1960 return(buf); 1961} 1962