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("$FreeBSD$"); 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 73struct keytab { 74 const char *kt_cp; 75 int kt_i; 76} keywords[] = { 77#include "keywords.h" 78 {0, 0} 79}; 80 81union sockunion { 82 struct sockaddr sa; 83 struct sockaddr_in sin; 84#ifdef INET6 85 struct sockaddr_in6 sin6; 86#endif 87 struct sockaddr_at sat; 88 struct sockaddr_dl sdl; 89 struct sockaddr_inarp sinarp; 90 struct sockaddr_storage ss; /* added to avoid memory overrun */ 91} so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 92 93typedef union sockunion *sup; 94int pid, rtm_addrs; 95int s; 96int forcehost, forcenet, doflush, nflag, af, qflag, tflag; 97int verbose, aflen = sizeof (struct sockaddr_in); 98int locking, lockrest, debugonly; 99struct rt_metrics rt_metrics; 100u_long rtm_inits; 101uid_t uid; 102static int defaultfib; 103static int numfibs; 104 105static int atalk_aton(const char *, struct at_addr *); 106static char *atalk_ntoa(struct at_addr); 107static void bprintf(FILE *, int, u_char *); 108static void flushroutes(int argc, char *argv[]); 109static int flushroutes_fib(int); 110static int getaddr(int, char *, struct hostent **, int); 111static int keyword(const char *); 112static void inet_makenetandmask(u_long, struct sockaddr_in *, u_long); 113#ifdef INET6 114static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 115#endif 116static void interfaces(void); 117static void mask_addr(void); 118static void monitor(int, char*[]); 119static const char *netname(struct sockaddr *); 120static void newroute(int, char **); 121static int newroute_fib(int, char *, int); 122static void pmsg_addrs(char *, int, size_t); 123static void pmsg_common(struct rt_msghdr *, size_t); 124static int prefixlen(const char *); 125static void print_getmsg(struct rt_msghdr *, int, int); 126static void print_rtmsg(struct rt_msghdr *, size_t); 127static const char *routename(struct sockaddr *); 128static int rtmsg(int, int, int); 129static void set_metric(char *, int); 130static int set_sofib(int); 131static int set_procfib(int); 132static void sockaddr(char *, struct sockaddr *); 133static void sodump(sup, const char *); 134extern char *iso_ntoa(void); 135 136struct fibl { 137 TAILQ_ENTRY(fibl) fl_next; 138 139 int fl_num; 140 int fl_error; 141 int fl_errno; 142}; 143TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 144 145static int fiboptlist_csv(const char *, struct fibl_head_t *); 146static int fiboptlist_range(const char *, struct fibl_head_t *); 147 148static void usage(const char *) __dead2; 149 150void 151usage(const char *cp) 152{ 153 if (cp != NULL) 154 warnx("bad keyword: %s", cp); 155 (void) fprintf(stderr, 156 "usage: route [-46dnqtv] command [[modifiers] args]\n"); 157 exit(EX_USAGE); 158 /* NOTREACHED */ 159} 160 161int 162main(int argc, char **argv) 163{ 164 int ch; 165 size_t len; 166 167 if (argc < 2) 168 usage(NULL); 169 170 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 171 switch(ch) { 172 case '4': 173#ifdef INET 174 af = AF_INET; 175 aflen = sizeof(struct sockaddr_in); 176#else 177 errx(1, "IPv4 support is not compiled in"); 178#endif 179 break; 180 case '6': 181#ifdef INET6 182 af = AF_INET6; 183 aflen = sizeof(struct sockaddr_in6); 184#else 185 errx(1, "IPv6 support is not compiled in"); 186#endif 187 break; 188 case 'n': 189 nflag = 1; 190 break; 191 case 'q': 192 qflag = 1; 193 break; 194 case 'v': 195 verbose = 1; 196 break; 197 case 't': 198 tflag = 1; 199 break; 200 case 'd': 201 debugonly = 1; 202 break; 203 case '?': 204 default: 205 usage(NULL); 206 } 207 argc -= optind; 208 argv += optind; 209 210 pid = getpid(); 211 uid = geteuid(); 212 if (tflag) 213 s = open(_PATH_DEVNULL, O_WRONLY, 0); 214 else 215 s = socket(PF_ROUTE, SOCK_RAW, 0); 216 if (s < 0) 217 err(EX_OSERR, "socket"); 218 219 len = sizeof(numfibs); 220 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 221 numfibs = -1; 222 223 len = sizeof(defaultfib); 224 if (numfibs != -1 && 225 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 226 0) == -1) 227 defaultfib = -1; 228 229 if (*argv != NULL) 230 switch (keyword(*argv)) { 231 case K_GET: 232 case K_SHOW: 233 uid = 0; 234 /* FALLTHROUGH */ 235 236 case K_CHANGE: 237 case K_ADD: 238 case K_DEL: 239 case K_DELETE: 240 newroute(argc, argv); 241 /* NOTREACHED */ 242 243 case K_MONITOR: 244 monitor(argc, argv); 245 /* NOTREACHED */ 246 247 case K_FLUSH: 248 flushroutes(argc, argv); 249 exit(0); 250 /* NOTREACHED */ 251 } 252 usage(*argv); 253 /* NOTREACHED */ 254} 255 256static int 257set_sofib(int fib) 258{ 259 260 if (fib < 0) 261 return (0); 262 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 263 sizeof(fib))); 264} 265 266static int 267set_procfib(int fib) 268{ 269 270 if (fib < 0) 271 return (0); 272 return (setfib(fib)); 273} 274 275static int 276fiboptlist_range(const char *arg, struct fibl_head_t *flh) 277{ 278 struct fibl *fl; 279 char *str0, *str, *token, *endptr; 280 int fib[2], i, error; 281 282 str0 = str = strdup(arg); 283 error = 0; 284 i = 0; 285 while ((token = strsep(&str, "-")) != NULL) { 286 switch (i) { 287 case 0: 288 case 1: 289 errno = 0; 290 fib[i] = strtol(token, &endptr, 0); 291 if (errno == 0) { 292 if (*endptr != '\0' || 293 fib[i] < 0 || 294 (numfibs != -1 && fib[i] > numfibs - 1)) 295 errno = EINVAL; 296 } 297 if (errno) 298 error = 1; 299 break; 300 default: 301 error = 1; 302 } 303 if (error) 304 goto fiboptlist_range_ret; 305 i++; 306 } 307 if (fib[0] >= fib[1]) { 308 error = 1; 309 goto fiboptlist_range_ret; 310 } 311 for (i = fib[0]; i <= fib[1]; i++) { 312 fl = calloc(1, sizeof(*fl)); 313 if (fl == NULL) { 314 error = 1; 315 goto fiboptlist_range_ret; 316 } 317 fl->fl_num = i; 318 TAILQ_INSERT_TAIL(flh, fl, fl_next); 319 } 320fiboptlist_range_ret: 321 free(str0); 322 return (error); 323} 324 325#define ALLSTRLEN 64 326static int 327fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 328{ 329 struct fibl *fl; 330 char *str0, *str, *token, *endptr; 331 int fib, error; 332 333 if (strcmp("all", arg) == 0) { 334 str = calloc(1, ALLSTRLEN); 335 if (str == NULL) { 336 error = 1; 337 goto fiboptlist_csv_ret; 338 } 339 if (numfibs > 1) 340 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 341 else 342 snprintf(str, ALLSTRLEN - 1, "%d", 0); 343 } else if (strcmp("default", arg) == 0) { 344 str0 = str = calloc(1, ALLSTRLEN); 345 if (str == NULL) { 346 error = 1; 347 goto fiboptlist_csv_ret; 348 } 349 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 350 } else 351 str0 = str = strdup(arg); 352 353 error = 0; 354 while ((token = strsep(&str, ",")) != NULL) { 355 if (*token != '-' && strchr(token, '-') != NULL) { 356 error = fiboptlist_range(token, flh); 357 if (error) 358 goto fiboptlist_csv_ret; 359 } else { 360 errno = 0; 361 fib = strtol(token, &endptr, 0); 362 if (errno == 0) { 363 if (*endptr != '\0' || 364 fib < 0 || 365 (numfibs != -1 && fib > numfibs - 1)) 366 errno = EINVAL; 367 } 368 if (errno) { 369 error = 1; 370 goto fiboptlist_csv_ret; 371 } 372 fl = calloc(1, sizeof(*fl)); 373 if (fl == NULL) { 374 error = 1; 375 goto fiboptlist_csv_ret; 376 } 377 fl->fl_num = fib; 378 TAILQ_INSERT_TAIL(flh, fl, fl_next); 379 } 380 } 381fiboptlist_csv_ret: 382 free(str0); 383 return (error); 384} 385 386/* 387 * Purge all entries in the routing tables not 388 * associated with network interfaces. 389 */ 390static void 391flushroutes(int argc, char *argv[]) 392{ 393 struct fibl *fl; 394 int error; 395 396 if (uid != 0 && !debugonly) { 397 errx(EX_NOPERM, "must be root to alter routing table"); 398 } 399 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 400 401 TAILQ_INIT(&fibl_head); 402 while (argc > 1) { 403 argc--; 404 argv++; 405 if (**argv != '-') 406 usage(*argv); 407 switch (keyword(*argv + 1)) { 408 case K_4: 409 case K_INET: 410 af = AF_INET; 411 break; 412#ifdef INET6 413 case K_6: 414 case K_INET6: 415 af = AF_INET6; 416 break; 417#endif 418 case K_ATALK: 419 af = AF_APPLETALK; 420 break; 421 case K_LINK: 422 af = AF_LINK; 423 break; 424 case K_FIB: 425 if (!--argc) 426 usage(*argv); 427 error = fiboptlist_csv(*++argv, &fibl_head); 428 if (error) 429 errx(EX_USAGE, "invalid fib number: %s", *argv); 430 break; 431 default: 432 usage(*argv); 433 } 434 } 435 if (TAILQ_EMPTY(&fibl_head)) { 436 error = fiboptlist_csv("default", &fibl_head); 437 if (error) 438 errx(EX_OSERR, "fiboptlist_csv failed."); 439 } 440 TAILQ_FOREACH(fl, &fibl_head, fl_next) 441 flushroutes_fib(fl->fl_num); 442} 443 444static int 445flushroutes_fib(int fib) 446{ 447 struct rt_msghdr *rtm; 448 size_t needed; 449 char *buf, *next, *lim; 450 int mib[6], rlen, seqno, count = 0; 451 int error; 452 453 error = set_sofib(fib); 454 error += set_procfib(fib); 455 if (error) { 456 warn("fib number %d is ignored", fib); 457 return (error); 458 } 459 460retry: 461 mib[0] = CTL_NET; 462 mib[1] = PF_ROUTE; 463 mib[2] = 0; /* protocol */ 464 mib[3] = 0; /* wildcard address family */ 465 mib[4] = NET_RT_DUMP; 466 mib[5] = 0; /* no flags */ 467 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 468 err(EX_OSERR, "route-sysctl-estimate"); 469 if ((buf = malloc(needed)) == NULL) 470 errx(EX_OSERR, "malloc failed"); 471 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 472 if (errno == ENOMEM && count++ < 10) { 473 warnx("Routing table grew, retrying"); 474 sleep(1); 475 free(buf); 476 goto retry; 477 } 478 err(EX_OSERR, "route-sysctl-get"); 479 } 480 lim = buf + needed; 481 if (verbose) 482 (void) printf("Examining routing table from sysctl\n"); 483 seqno = 0; /* ??? */ 484 for (next = buf; next < lim; next += rtm->rtm_msglen) { 485 rtm = (struct rt_msghdr *)next; 486 if (verbose) 487 print_rtmsg(rtm, rtm->rtm_msglen); 488 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 489 continue; 490 if (af != 0) { 491 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 492 493 if (sa->sa_family != af) 494 continue; 495 } 496 if (debugonly) 497 continue; 498 rtm->rtm_type = RTM_DELETE; 499 rtm->rtm_seq = seqno; 500 rlen = write(s, next, rtm->rtm_msglen); 501 if (rlen < 0 && errno == EPERM) 502 err(1, "write to routing socket"); 503 if (rlen < (int)rtm->rtm_msglen) { 504 warn("write to routing socket"); 505 (void) printf("got only %d for rlen\n", rlen); 506 free(buf); 507 goto retry; 508 break; 509 } 510 seqno++; 511 if (qflag) 512 continue; 513 if (verbose) 514 print_rtmsg(rtm, rlen); 515 else { 516 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 517 518 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 519 routename(sa) : netname(sa)); 520 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 521 printf("%-20.20s ", routename(sa)); 522 if (fib >= 0) 523 printf("-fib %-3d ", fib); 524 printf("done\n"); 525 } 526 } 527 return (error); 528} 529 530const char * 531routename(struct sockaddr *sa) 532{ 533 const char *cp; 534 static char line[MAXHOSTNAMELEN + 1]; 535 struct hostent *hp; 536 static char domain[MAXHOSTNAMELEN + 1]; 537 static int first = 1, n; 538 539 if (first) { 540 first = 0; 541 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 542 (cp = strchr(domain, '.'))) { 543 domain[MAXHOSTNAMELEN] = '\0'; 544 (void) strcpy(domain, cp + 1); 545 } else 546 domain[0] = 0; 547 } 548 549 if (sa->sa_len == 0) 550 strcpy(line, "default"); 551 else switch (sa->sa_family) { 552 553 case AF_INET: 554 { struct in_addr in; 555 in = ((struct sockaddr_in *)sa)->sin_addr; 556 557 cp = NULL; 558 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 559 cp = "default"; 560 if (cp == NULL && !nflag) { 561 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 562 AF_INET); 563 if (hp != NULL) { 564 char *cptr; 565 cptr = strchr(hp->h_name, '.'); 566 if (cptr != NULL && 567 strcmp(cptr + 1, domain) == 0) 568 *cptr = '\0'; 569 cp = hp->h_name; 570 } 571 } 572 if (cp != NULL) { 573 strncpy(line, cp, sizeof(line) - 1); 574 line[sizeof(line) - 1] = '\0'; 575 } else 576 (void) sprintf(line, "%s", inet_ntoa(in)); 577 break; 578 } 579 580#ifdef INET6 581 case AF_INET6: 582 { 583 struct sockaddr_in6 sin6; /* use static var for safety */ 584 int niflags = 0; 585 586 memset(&sin6, 0, sizeof(sin6)); 587 memcpy(&sin6, sa, sa->sa_len); 588 sin6.sin6_len = sizeof(struct sockaddr_in6); 589 sin6.sin6_family = AF_INET6; 590#ifdef __KAME__ 591 if (sa->sa_len == sizeof(struct sockaddr_in6) && 592 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 593 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) || 594 IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr)) && 595 sin6.sin6_scope_id == 0) { 596 sin6.sin6_scope_id = 597 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 598 sin6.sin6_addr.s6_addr[2] = 0; 599 sin6.sin6_addr.s6_addr[3] = 0; 600 } 601#endif 602 if (nflag) 603 niflags |= NI_NUMERICHOST; 604 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 605 line, sizeof(line), NULL, 0, niflags) != 0) 606 strncpy(line, "invalid", sizeof(line)); 607 608 return(line); 609 } 610#endif 611 612 case AF_APPLETALK: 613 (void) snprintf(line, sizeof(line), "atalk %s", 614 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 615 break; 616 617 case AF_LINK: 618 return (link_ntoa((struct sockaddr_dl *)sa)); 619 620 default: 621 { 622 u_short *sp = (u_short *)sa; 623 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 624 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 625 char *cpe = line + sizeof(line); 626 627 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 628 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 629 cps += n; 630 else 631 *cps = '\0'; 632 break; 633 } 634 } 635 return (line); 636} 637 638/* 639 * Return the name of the network whose address is given. 640 * The address is assumed to be that of a net or subnet, not a host. 641 */ 642const char * 643netname(struct sockaddr *sa) 644{ 645 const char *cp = NULL; 646 static char line[MAXHOSTNAMELEN + 1]; 647 struct netent *np = NULL; 648 u_long net, mask; 649 u_long i; 650 int n, subnetshift; 651 652 switch (sa->sa_family) { 653 654 case AF_INET: 655 { struct in_addr in; 656 in = ((struct sockaddr_in *)sa)->sin_addr; 657 658 i = in.s_addr = ntohl(in.s_addr); 659 if (in.s_addr == 0) 660 cp = "default"; 661 else if (!nflag) { 662 if (IN_CLASSA(i)) { 663 mask = IN_CLASSA_NET; 664 subnetshift = 8; 665 } else if (IN_CLASSB(i)) { 666 mask = IN_CLASSB_NET; 667 subnetshift = 8; 668 } else { 669 mask = IN_CLASSC_NET; 670 subnetshift = 4; 671 } 672 /* 673 * If there are more bits than the standard mask 674 * would suggest, subnets must be in use. 675 * Guess at the subnet mask, assuming reasonable 676 * width subnet fields. 677 */ 678 while (in.s_addr &~ mask) 679 mask = (long)mask >> subnetshift; 680 net = in.s_addr & mask; 681 while ((mask & 1) == 0) 682 mask >>= 1, net >>= 1; 683 np = getnetbyaddr(net, AF_INET); 684 if (np != NULL) 685 cp = np->n_name; 686 } 687#define C(x) (unsigned)((x) & 0xff) 688 if (cp != NULL) 689 strncpy(line, cp, sizeof(line)); 690 else if ((in.s_addr & 0xffffff) == 0) 691 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 692 else if ((in.s_addr & 0xffff) == 0) 693 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 694 C(in.s_addr >> 16)); 695 else if ((in.s_addr & 0xff) == 0) 696 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 697 C(in.s_addr >> 16), C(in.s_addr >> 8)); 698 else 699 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 700 C(in.s_addr >> 16), C(in.s_addr >> 8), 701 C(in.s_addr)); 702#undef C 703 break; 704 } 705 706#ifdef INET6 707 case AF_INET6: 708 { 709 struct sockaddr_in6 sin6; /* use static var for safety */ 710 int niflags = 0; 711 712 memset(&sin6, 0, sizeof(sin6)); 713 memcpy(&sin6, sa, sa->sa_len); 714 sin6.sin6_len = sizeof(struct sockaddr_in6); 715 sin6.sin6_family = AF_INET6; 716#ifdef __KAME__ 717 if (sa->sa_len == sizeof(struct sockaddr_in6) && 718 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 719 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) || 720 IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr)) && 721 sin6.sin6_scope_id == 0) { 722 sin6.sin6_scope_id = 723 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 724 sin6.sin6_addr.s6_addr[2] = 0; 725 sin6.sin6_addr.s6_addr[3] = 0; 726 } 727#endif 728 if (nflag) 729 niflags |= NI_NUMERICHOST; 730 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 731 line, sizeof(line), NULL, 0, niflags) != 0) 732 strncpy(line, "invalid", sizeof(line)); 733 734 return(line); 735 } 736#endif 737 738 case AF_APPLETALK: 739 (void) snprintf(line, sizeof(line), "atalk %s", 740 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 741 break; 742 743 case AF_LINK: 744 return (link_ntoa((struct sockaddr_dl *)sa)); 745 746 747 default: 748 { 749 u_short *sp = (u_short *)sa->sa_data; 750 u_short *splim = sp + ((sa->sa_len + 1)>>1); 751 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 752 char *cpe = line + sizeof(line); 753 754 while (sp < splim && cps < cpe) 755 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 756 cps += n; 757 else 758 *cps = '\0'; 759 break; 760 } 761 } 762 return (line); 763} 764 765static void 766set_metric(char *value, int key) 767{ 768 int flag = 0; 769 u_long noval, *valp = &noval; 770 771 switch (key) { 772#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 773 caseof(K_MTU, RTV_MTU, rmx_mtu); 774 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 775 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 776 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 777 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 778 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 779 caseof(K_RTT, RTV_RTT, rmx_rtt); 780 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 781 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 782 } 783 rtm_inits |= flag; 784 if (lockrest || locking) 785 rt_metrics.rmx_locks |= flag; 786 if (locking) 787 locking = 0; 788 *valp = atoi(value); 789} 790 791#define F_ISHOST 0x01 792#define F_FORCENET 0x02 793#define F_FORCEHOST 0x04 794#define F_PROXY 0x08 795#define F_INTERFACE 0x10 796 797static void 798newroute(int argc, char **argv) 799{ 800 struct hostent *hp; 801 struct fibl *fl; 802 char *cmd; 803 const char *dest, *gateway, *errmsg; 804 int key, error, flags, nrflags, fibnum; 805 806 if (uid != 0) { 807 errx(EX_NOPERM, "must be root to alter routing table"); 808 } 809 810 dest = NULL; 811 gateway = NULL; 812 flags = RTF_STATIC; 813 nrflags = 0; 814 hp = NULL; 815 TAILQ_INIT(&fibl_head); 816 817 cmd = argv[0]; 818 if (*cmd != 'g' && *cmd != 's') 819 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 820 821 while (--argc > 0) { 822 if (**(++argv)== '-') { 823 switch (key = keyword(1 + *argv)) { 824 case K_LINK: 825 af = AF_LINK; 826 aflen = sizeof(struct sockaddr_dl); 827 break; 828 case K_4: 829 case K_INET: 830 af = AF_INET; 831 aflen = sizeof(struct sockaddr_in); 832 break; 833#ifdef INET6 834 case K_6: 835 case K_INET6: 836 af = AF_INET6; 837 aflen = sizeof(struct sockaddr_in6); 838 break; 839#endif 840 case K_ATALK: 841 af = AF_APPLETALK; 842 aflen = sizeof(struct sockaddr_at); 843 break; 844 case K_SA: 845 af = PF_ROUTE; 846 aflen = sizeof(union sockunion); 847 break; 848 case K_IFACE: 849 case K_INTERFACE: 850 nrflags |= F_INTERFACE; 851 break; 852 case K_NOSTATIC: 853 flags &= ~RTF_STATIC; 854 break; 855 case K_LOCK: 856 locking = 1; 857 break; 858 case K_LOCKREST: 859 lockrest = 1; 860 break; 861 case K_HOST: 862 nrflags |= F_FORCEHOST; 863 break; 864 case K_REJECT: 865 flags |= RTF_REJECT; 866 break; 867 case K_BLACKHOLE: 868 flags |= RTF_BLACKHOLE; 869 break; 870 case K_PROTO1: 871 flags |= RTF_PROTO1; 872 break; 873 case K_PROTO2: 874 flags |= RTF_PROTO2; 875 break; 876 case K_PROXY: 877 nrflags |= F_PROXY; 878 break; 879 case K_XRESOLVE: 880 flags |= RTF_XRESOLVE; 881 break; 882 case K_STATIC: 883 flags |= RTF_STATIC; 884 break; 885 case K_STICKY: 886 flags |= RTF_STICKY; 887 break; 888 case K_NOSTICK: 889 flags &= ~RTF_STICKY; 890 break; 891 case K_FIB: 892 if (!--argc) 893 usage(NULL); 894 error = fiboptlist_csv(*++argv, &fibl_head); 895 if (error) 896 errx(EX_USAGE, 897 "invalid fib number: %s", *argv); 898 break; 899 case K_IFA: 900 if (!--argc) 901 usage(NULL); 902 getaddr(RTA_IFA, *++argv, 0, nrflags); 903 break; 904 case K_IFP: 905 if (!--argc) 906 usage(NULL); 907 getaddr(RTA_IFP, *++argv, 0, nrflags); 908 break; 909 case K_GENMASK: 910 if (!--argc) 911 usage(NULL); 912 getaddr(RTA_GENMASK, *++argv, 0, nrflags); 913 break; 914 case K_GATEWAY: 915 if (!--argc) 916 usage(NULL); 917 getaddr(RTA_GATEWAY, *++argv, 0, nrflags); 918 gateway = *argv; 919 break; 920 case K_DST: 921 if (!--argc) 922 usage(NULL); 923 if (getaddr(RTA_DST, *++argv, &hp, nrflags)) 924 nrflags |= F_ISHOST; 925 dest = *argv; 926 break; 927 case K_NETMASK: 928 if (!--argc) 929 usage(NULL); 930 getaddr(RTA_NETMASK, *++argv, 0, nrflags); 931 /* FALLTHROUGH */ 932 case K_NET: 933 nrflags |= F_FORCENET; 934 break; 935 case K_PREFIXLEN: 936 if (!--argc) 937 usage(NULL); 938 if (prefixlen(*++argv) == -1) { 939 nrflags &= ~F_FORCENET; 940 nrflags |= F_ISHOST; 941 } else { 942 nrflags |= F_FORCENET; 943 nrflags &= ~F_ISHOST; 944 } 945 break; 946 case K_MTU: 947 case K_HOPCOUNT: 948 case K_EXPIRE: 949 case K_RECVPIPE: 950 case K_SENDPIPE: 951 case K_SSTHRESH: 952 case K_RTT: 953 case K_RTTVAR: 954 case K_WEIGHT: 955 if (!--argc) 956 usage(NULL); 957 set_metric(*++argv, key); 958 break; 959 default: 960 usage(1+*argv); 961 } 962 } else { 963 if ((rtm_addrs & RTA_DST) == 0) { 964 dest = *argv; 965 if (getaddr(RTA_DST, *argv, &hp, nrflags)) 966 nrflags |= F_ISHOST; 967 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 968 gateway = *argv; 969 getaddr(RTA_GATEWAY, *argv, &hp, nrflags); 970 } else { 971 getaddr(RTA_NETMASK, *argv, 0, nrflags); 972 nrflags |= F_FORCENET; 973 } 974 } 975 } 976 977 if (nrflags & F_FORCEHOST) { 978 nrflags |= F_ISHOST; 979#ifdef INET6 980 if (af == AF_INET6) { 981 rtm_addrs &= ~RTA_NETMASK; 982 memset((void *)&so_mask, 0, sizeof(so_mask)); 983 } 984#endif 985 } 986 if (nrflags & F_FORCENET) 987 nrflags &= ~F_ISHOST; 988 flags |= RTF_UP; 989 if (nrflags & F_ISHOST) 990 flags |= RTF_HOST; 991 if ((nrflags & F_INTERFACE) == 0) 992 flags |= RTF_GATEWAY; 993 if (nrflags & F_PROXY) { 994 so_dst.sinarp.sin_other = SIN_PROXY; 995 flags |= RTF_ANNOUNCE; 996 } 997 if (dest == NULL) 998 dest = ""; 999 if (gateway == NULL) 1000 gateway = ""; 1001 1002 if (TAILQ_EMPTY(&fibl_head)) { 1003 error = fiboptlist_csv("default", &fibl_head); 1004 if (error) 1005 errx(EX_OSERR, "fiboptlist_csv failed."); 1006 } 1007 error = 0; 1008 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1009 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1010 if (fl->fl_error) 1011 fl->fl_errno = errno; 1012 error += fl->fl_error; 1013 } 1014 if (*cmd == 'g' || *cmd == 's') 1015 exit(error); 1016 1017 error = 0; 1018 if (!qflag) { 1019 fibnum = 0; 1020 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1021 if (fl->fl_error == 0) 1022 fibnum++; 1023 } 1024 if (fibnum > 0) { 1025 int firstfib = 1; 1026 1027 printf("%s %s %s", cmd, 1028 (nrflags & F_ISHOST) ? "host" : "net", dest); 1029 if (*gateway) 1030 printf(": gateway %s", gateway); 1031 1032 if (numfibs > 1) { 1033 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1034 if (fl->fl_error == 0 1035 && fl->fl_num >= 0) { 1036 if (firstfib) { 1037 printf(" fib "); 1038 firstfib = 0; 1039 } 1040 printf("%d", fl->fl_num); 1041 if (fibnum-- > 1) 1042 printf(","); 1043 } 1044 } 1045 } 1046 printf("\n"); 1047 } 1048 1049 fibnum = 0; 1050 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1051 if (fl->fl_error != 0) { 1052 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1053 ? "host" : "net", dest); 1054 if (*gateway) 1055 printf(": gateway %s", gateway); 1056 1057 if (fl->fl_num >= 0) 1058 printf(" fib %d", fl->fl_num); 1059 1060 switch (fl->fl_errno) { 1061 case ESRCH: 1062 errmsg = "not in table"; 1063 break; 1064 case EBUSY: 1065 errmsg = "entry in use"; 1066 break; 1067 case ENOBUFS: 1068 errmsg = "not enough memory"; 1069 break; 1070 case EADDRINUSE: 1071 /* 1072 * handle recursion avoidance 1073 * in rt_setgate() 1074 */ 1075 errmsg = "gateway uses the same route"; 1076 break; 1077 case EEXIST: 1078 errmsg = "route already in table"; 1079 break; 1080 default: 1081 errmsg = strerror(fl->fl_errno); 1082 break; 1083 } 1084 printf(": %s\n", errmsg); 1085 error = 1; 1086 } 1087 } 1088 } 1089 exit(error); 1090} 1091 1092static int 1093newroute_fib(int fib, char *cmd, int flags) 1094{ 1095 int error; 1096 1097 error = set_sofib(fib); 1098 if (error) { 1099 warn("fib number %d is ignored", fib); 1100 return (error); 1101 } 1102 1103 error = rtmsg(*cmd, flags, fib); 1104 return (error); 1105} 1106 1107static void 1108inet_makenetandmask(u_long net, struct sockaddr_in *sin, u_long bits) 1109{ 1110 u_long addr, mask = 0; 1111 char *cp; 1112 1113 rtm_addrs |= RTA_NETMASK; 1114 /* 1115 * XXX: This approach unable to handle 0.0.0.1/32 correctly 1116 * as inet_network() converts 0.0.0.1 and 1 equally. 1117 */ 1118 if (net <= 0xff) 1119 addr = net << IN_CLASSA_NSHIFT; 1120 else if (net <= 0xffff) 1121 addr = net << IN_CLASSB_NSHIFT; 1122 else if (net <= 0xffffff) 1123 addr = net << IN_CLASSC_NSHIFT; 1124 else 1125 addr = net; 1126 /* 1127 * If no /xx was specified we must calculate the 1128 * CIDR address. 1129 */ 1130 if ((bits == 0) && (addr != 0)) { 1131 u_long i, j; 1132 for(i=0,j=0xff; i<4; i++) { 1133 if (addr & j) { 1134 break; 1135 } 1136 j <<= 8; 1137 } 1138 /* i holds the first non zero bit */ 1139 bits = 32 - (i*8); 1140 } 1141 if (bits != 0) 1142 mask = 0xffffffff << (32 - bits); 1143 1144 sin->sin_addr.s_addr = htonl(addr); 1145 sin = &so_mask.sin; 1146 sin->sin_addr.s_addr = htonl(mask); 1147 sin->sin_len = 0; 1148 sin->sin_family = 0; 1149 cp = (char *)(&sin->sin_addr + 1); 1150 while (*--cp == 0 && cp > (char *)sin) 1151 ; 1152 sin->sin_len = 1 + cp - (char *)sin; 1153} 1154 1155#ifdef INET6 1156/* 1157 * XXX the function may need more improvement... 1158 */ 1159static int 1160inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1161{ 1162 struct in6_addr in6; 1163 1164 if (plen == NULL) { 1165 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1166 sin6->sin6_scope_id == 0) { 1167 plen = "0"; 1168 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1169 /* aggregatable global unicast - RFC2374 */ 1170 memset(&in6, 0, sizeof(in6)); 1171 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1172 &in6.s6_addr[8], 8)) 1173 plen = "64"; 1174 } 1175 } 1176 1177 if (plen == NULL || strcmp(plen, "128") == 0) 1178 return (1); 1179 rtm_addrs |= RTA_NETMASK; 1180 prefixlen(plen); 1181 return (0); 1182} 1183#endif 1184 1185/* 1186 * Interpret an argument as a network address of some kind, 1187 * returning 1 if a host address, 0 if a network address. 1188 */ 1189static int 1190getaddr(int which, char *str, struct hostent **hpp, int nrflags) 1191{ 1192 sup su; 1193 struct hostent *hp; 1194 struct netent *np; 1195 u_long val; 1196 char *q; 1197 int afamily; /* local copy of af so we can change it */ 1198 1199 if (af == 0) { 1200 af = AF_INET; 1201 aflen = sizeof(struct sockaddr_in); 1202 } 1203 afamily = af; 1204 rtm_addrs |= which; 1205 switch (which) { 1206 case RTA_DST: 1207 su = &so_dst; 1208 break; 1209 case RTA_GATEWAY: 1210 su = &so_gate; 1211 if (nrflags & F_INTERFACE) { 1212 struct ifaddrs *ifap, *ifa; 1213 struct sockaddr_dl *sdl = NULL; 1214 1215 if (getifaddrs(&ifap)) 1216 err(1, "getifaddrs"); 1217 1218 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1219 if (ifa->ifa_addr->sa_family != AF_LINK) 1220 continue; 1221 1222 if (strcmp(str, ifa->ifa_name) != 0) 1223 continue; 1224 1225 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1226 } 1227 /* If we found it, then use it */ 1228 if (sdl != NULL) { 1229 /* 1230 * Copy is safe since we have a 1231 * sockaddr_storage member in sockunion{}. 1232 * Note that we need to copy before calling 1233 * freeifaddrs(). 1234 */ 1235 memcpy(&su->sdl, sdl, sdl->sdl_len); 1236 } 1237 freeifaddrs(ifap); 1238 if (sdl != NULL) 1239 return(1); 1240 } 1241 break; 1242 case RTA_NETMASK: 1243 su = &so_mask; 1244 break; 1245 case RTA_GENMASK: 1246 su = &so_genmask; 1247 break; 1248 case RTA_IFP: 1249 su = &so_ifp; 1250 afamily = AF_LINK; 1251 break; 1252 case RTA_IFA: 1253 su = &so_ifa; 1254 break; 1255 default: 1256 usage("internal error"); 1257 /*NOTREACHED*/ 1258 } 1259 su->sa.sa_len = aflen; 1260 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1261 if (strcmp(str, "default") == 0) { 1262 /* 1263 * Default is net 0.0.0.0/0 1264 */ 1265 switch (which) { 1266 case RTA_DST: 1267 forcenet++; 1268#if 0 1269 bzero(su, sizeof(*su)); /* for readability */ 1270#endif 1271 getaddr(RTA_NETMASK, str, 0, nrflags); 1272 break; 1273#if 0 1274 case RTA_NETMASK: 1275 case RTA_GENMASK: 1276 bzero(su, sizeof(*su)); /* for readability */ 1277#endif 1278 } 1279 return (0); 1280 } 1281 switch (afamily) { 1282#ifdef INET6 1283 case AF_INET6: 1284 { 1285 struct addrinfo hints, *res; 1286 int ecode; 1287 1288 q = NULL; 1289 if (which == RTA_DST && (q = strchr(str, '/')) != NULL) 1290 *q = '\0'; 1291 memset(&hints, 0, sizeof(hints)); 1292 hints.ai_family = afamily; /*AF_INET6*/ 1293 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1294 ecode = getaddrinfo(str, NULL, &hints, &res); 1295 if (ecode != 0 || res->ai_family != AF_INET6 || 1296 res->ai_addrlen != sizeof(su->sin6)) { 1297 (void) fprintf(stderr, "%s: %s\n", str, 1298 gai_strerror(ecode)); 1299 exit(1); 1300 } 1301 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1302#ifdef __KAME__ 1303 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1304 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr) || 1305 IN6_IS_ADDR_MC_NODELOCAL(&su->sin6.sin6_addr)) && 1306 su->sin6.sin6_scope_id) { 1307 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1308 htons(su->sin6.sin6_scope_id); 1309 su->sin6.sin6_scope_id = 0; 1310 } 1311#endif 1312 freeaddrinfo(res); 1313 if (q != NULL) 1314 *q++ = '/'; 1315 if (which == RTA_DST) 1316 return (inet6_makenetandmask(&su->sin6, q)); 1317 return (0); 1318 } 1319#endif /* INET6 */ 1320 1321 case AF_APPLETALK: 1322 if (!atalk_aton(str, &su->sat.sat_addr)) 1323 errx(EX_NOHOST, "bad address: %s", str); 1324 rtm_addrs |= RTA_NETMASK; 1325 return(forcehost || su->sat.sat_addr.s_node != 0); 1326 1327 case AF_LINK: 1328 link_addr(str, &su->sdl); 1329 return (1); 1330 1331 1332 case PF_ROUTE: 1333 su->sa.sa_len = sizeof(*su); 1334 sockaddr(str, &su->sa); 1335 return (1); 1336 1337 case AF_INET: 1338 default: 1339 break; 1340 } 1341 1342 if (hpp == NULL) 1343 hpp = &hp; 1344 *hpp = NULL; 1345 1346 q = strchr(str,'/'); 1347 if (q != NULL && which == RTA_DST) { 1348 *q = '\0'; 1349 if ((val = inet_network(str)) != INADDR_NONE) { 1350 inet_makenetandmask( 1351 val, &su->sin, strtoul(q+1, 0, 0)); 1352 return (0); 1353 } 1354 *q = '/'; 1355 } 1356 if ((which != RTA_DST || forcenet == 0) && 1357 inet_aton(str, &su->sin.sin_addr)) { 1358 val = su->sin.sin_addr.s_addr; 1359 if (which != RTA_DST || forcehost || 1360 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1361 return (1); 1362 else { 1363 val = ntohl(val); 1364 goto netdone; 1365 } 1366 } 1367 if (which == RTA_DST && forcehost == 0 && 1368 ((val = inet_network(str)) != INADDR_NONE || 1369 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1370netdone: 1371 inet_makenetandmask(val, &su->sin, 0); 1372 return (0); 1373 } 1374 hp = gethostbyname(str); 1375 if (hp != NULL) { 1376 *hpp = hp; 1377 su->sin.sin_family = hp->h_addrtype; 1378 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1379 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr))); 1380 return (1); 1381 } 1382 errx(EX_NOHOST, "bad address: %s", str); 1383} 1384 1385static int 1386prefixlen(const char *str) 1387{ 1388 int len = atoi(str), q, r; 1389 int max; 1390 char *p; 1391 1392 rtm_addrs |= RTA_NETMASK; 1393 switch (af) { 1394#ifdef INET6 1395 case AF_INET6: 1396 max = 128; 1397 p = (char *)&so_mask.sin6.sin6_addr; 1398 break; 1399#endif 1400 case AF_INET: 1401 max = 32; 1402 p = (char *)&so_mask.sin.sin_addr; 1403 break; 1404 default: 1405 fprintf(stderr, "prefixlen not supported in this af\n"); 1406 exit(1); 1407 } 1408 1409 if (len < 0 || max < len) { 1410 fprintf(stderr, "%s: bad value\n", str); 1411 exit(1); 1412 } 1413 1414 q = len >> 3; 1415 r = len & 7; 1416 so_mask.sa.sa_family = af; 1417 so_mask.sa.sa_len = aflen; 1418 memset((void *)p, 0, max / 8); 1419 if (q > 0) 1420 memset((void *)p, 0xff, q); 1421 if (r > 0) 1422 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1423 if (len == max) 1424 return (-1); 1425 else 1426 return (len); 1427} 1428 1429static void 1430interfaces(void) 1431{ 1432 size_t needed; 1433 int mib[6]; 1434 char *buf, *lim, *next, count = 0; 1435 struct rt_msghdr *rtm; 1436 1437retry2: 1438 mib[0] = CTL_NET; 1439 mib[1] = PF_ROUTE; 1440 mib[2] = 0; /* protocol */ 1441 mib[3] = 0; /* wildcard address family */ 1442 mib[4] = NET_RT_IFLIST; 1443 mib[5] = 0; /* no flags */ 1444 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1445 err(EX_OSERR, "route-sysctl-estimate"); 1446 if ((buf = malloc(needed)) == NULL) 1447 errx(EX_OSERR, "malloc failed"); 1448 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 1449 if (errno == ENOMEM && count++ < 10) { 1450 warnx("Routing table grew, retrying"); 1451 sleep(1); 1452 free(buf); 1453 goto retry2; 1454 } 1455 err(EX_OSERR, "actual retrieval of interface table"); 1456 } 1457 lim = buf + needed; 1458 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1459 rtm = (struct rt_msghdr *)next; 1460 print_rtmsg(rtm, rtm->rtm_msglen); 1461 } 1462} 1463 1464static void 1465monitor(int argc, char *argv[]) 1466{ 1467 int n, fib, error; 1468 char msg[2048], *endptr; 1469 1470 fib = defaultfib; 1471 while (argc > 1) { 1472 argc--; 1473 argv++; 1474 if (**argv != '-') 1475 usage(*argv); 1476 switch (keyword(*argv + 1)) { 1477 case K_FIB: 1478 if (!--argc) 1479 usage(*argv); 1480 errno = 0; 1481 fib = strtol(*++argv, &endptr, 0); 1482 if (errno == 0) { 1483 if (*endptr != '\0' || 1484 fib < 0 || 1485 (numfibs != -1 && fib > numfibs - 1)) 1486 errno = EINVAL; 1487 } 1488 if (errno) 1489 errx(EX_USAGE, "invalid fib number: %s", *argv); 1490 break; 1491 default: 1492 usage(*argv); 1493 } 1494 } 1495 error = set_sofib(fib); 1496 if (error) 1497 errx(EX_USAGE, "invalid fib number: %d", fib); 1498 1499 verbose = 1; 1500 if (debugonly) { 1501 interfaces(); 1502 exit(0); 1503 } 1504 for (;;) { 1505 time_t now; 1506 n = read(s, msg, 2048); 1507 now = time(NULL); 1508 (void) printf("\ngot message of size %d on %s", n, ctime(&now)); 1509 print_rtmsg((struct rt_msghdr *)msg, n); 1510 } 1511} 1512 1513struct { 1514 struct rt_msghdr m_rtm; 1515 char m_space[512]; 1516} m_rtmsg; 1517 1518static int 1519rtmsg(int cmd, int flags, int fib) 1520{ 1521 static int seq; 1522 int rlen; 1523 char *cp = m_rtmsg.m_space; 1524 int l; 1525 1526#define NEXTADDR(w, u) \ 1527 if (rtm_addrs & (w)) {\ 1528 l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\ 1529 if (verbose) sodump(&(u),#u);\ 1530 } 1531 1532 errno = 0; 1533 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1534 if (cmd == 'a') 1535 cmd = RTM_ADD; 1536 else if (cmd == 'c') 1537 cmd = RTM_CHANGE; 1538 else if (cmd == 'g' || cmd == 's') { 1539 cmd = RTM_GET; 1540 if (so_ifp.sa.sa_family == 0) { 1541 so_ifp.sa.sa_family = AF_LINK; 1542 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1543 rtm_addrs |= RTA_IFP; 1544 } 1545 } else 1546 cmd = RTM_DELETE; 1547#define rtm m_rtmsg.m_rtm 1548 rtm.rtm_type = cmd; 1549 rtm.rtm_flags = flags; 1550 rtm.rtm_version = RTM_VERSION; 1551 rtm.rtm_seq = ++seq; 1552 rtm.rtm_addrs = rtm_addrs; 1553 rtm.rtm_rmx = rt_metrics; 1554 rtm.rtm_inits = rtm_inits; 1555 1556 if (rtm_addrs & RTA_NETMASK) 1557 mask_addr(); 1558 NEXTADDR(RTA_DST, so_dst); 1559 NEXTADDR(RTA_GATEWAY, so_gate); 1560 NEXTADDR(RTA_NETMASK, so_mask); 1561 NEXTADDR(RTA_GENMASK, so_genmask); 1562 NEXTADDR(RTA_IFP, so_ifp); 1563 NEXTADDR(RTA_IFA, so_ifa); 1564 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1565 if (verbose) 1566 print_rtmsg(&rtm, l); 1567 if (debugonly) 1568 return (0); 1569 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1570 if (errno == EPERM) 1571 err(1, "writing to routing socket"); 1572 warn("writing to routing socket"); 1573 return (-1); 1574 } 1575 if (cmd == RTM_GET) { 1576 do { 1577 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1578 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1579 if (l < 0) 1580 warn("read from routing socket"); 1581 else 1582 print_getmsg(&rtm, l, fib); 1583 } 1584#undef rtm 1585 return (0); 1586} 1587 1588static void 1589mask_addr(void) 1590{ 1591 int olen = so_mask.sa.sa_len; 1592 char *cp1 = olen + (char *)&so_mask, *cp2; 1593 1594 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1595 if (*--cp1 != 0) { 1596 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1597 break; 1598 } 1599 if ((rtm_addrs & RTA_DST) == 0) 1600 return; 1601 switch (so_dst.sa.sa_family) { 1602 case AF_INET: 1603#ifdef INET6 1604 case AF_INET6: 1605#endif 1606 case AF_APPLETALK: 1607 case 0: 1608 return; 1609 } 1610 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1611 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1612 while (cp2 > cp1) 1613 *--cp2 = 0; 1614 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1615 while (cp1 > so_dst.sa.sa_data) 1616 *--cp1 &= *--cp2; 1617} 1618 1619const char *msgtypes[] = { 1620 "", 1621 "RTM_ADD: Add Route", 1622 "RTM_DELETE: Delete Route", 1623 "RTM_CHANGE: Change Metrics or flags", 1624 "RTM_GET: Report Metrics", 1625 "RTM_LOSING: Kernel Suspects Partitioning", 1626 "RTM_REDIRECT: Told to use different route", 1627 "RTM_MISS: Lookup failed on this address", 1628 "RTM_LOCK: fix specified metrics", 1629 "RTM_OLDADD: caused by SIOCADDRT", 1630 "RTM_OLDDEL: caused by SIOCDELRT", 1631 "RTM_RESOLVE: Route created by cloning", 1632 "RTM_NEWADDR: address being added to iface", 1633 "RTM_DELADDR: address being removed from iface", 1634 "RTM_IFINFO: iface status change", 1635 "RTM_NEWMADDR: new multicast group membership on iface", 1636 "RTM_DELMADDR: multicast group membership removed from iface", 1637 "RTM_IFANNOUNCE: interface arrival/departure", 1638 "RTM_IEEE80211: IEEE 802.11 wireless event", 1639}; 1640 1641char metricnames[] = 1642"\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1643"\1mtu"; 1644char routeflags[] = 1645"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1646"\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1647"\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1648"\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1649char ifnetflags[] = 1650"\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1651"\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1652"\017LINK2\020MULTICAST"; 1653char addrnames[] = 1654"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1655 1656static const char errfmt[] = 1657"\n%s: truncated route message, only %zu bytes left\n"; 1658 1659static void 1660print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1661{ 1662 struct if_msghdr *ifm; 1663 struct ifa_msghdr *ifam; 1664#ifdef RTM_NEWMADDR 1665 struct ifma_msghdr *ifmam; 1666#endif 1667 struct if_announcemsghdr *ifan; 1668 const char *state; 1669 1670 if (verbose == 0) 1671 return; 1672 if (rtm->rtm_version != RTM_VERSION) { 1673 (void) printf("routing message version %d not understood\n", 1674 rtm->rtm_version); 1675 return; 1676 } 1677 if (rtm->rtm_type < sizeof(msgtypes) / sizeof(msgtypes[0])) 1678 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1679 else 1680 (void)printf("unknown type %d: ", rtm->rtm_type); 1681 (void)printf("len %d, ", rtm->rtm_msglen); 1682 1683#define REQUIRE(x) do { \ 1684 if (msglen < sizeof(x)) \ 1685 goto badlen; \ 1686 else \ 1687 msglen -= sizeof(x); \ 1688 } while (0) 1689 1690 switch (rtm->rtm_type) { 1691 case RTM_IFINFO: 1692 REQUIRE(struct if_msghdr); 1693 ifm = (struct if_msghdr *)rtm; 1694 (void) printf("if# %d, ", ifm->ifm_index); 1695 switch (ifm->ifm_data.ifi_link_state) { 1696 case LINK_STATE_DOWN: 1697 state = "down"; 1698 break; 1699 case LINK_STATE_UP: 1700 state = "up"; 1701 break; 1702 default: 1703 state = "unknown"; 1704 break; 1705 } 1706 (void) printf("link: %s, flags:", state); 1707 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1708 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1709 break; 1710 case RTM_NEWADDR: 1711 case RTM_DELADDR: 1712 REQUIRE(struct ifa_msghdr); 1713 ifam = (struct ifa_msghdr *)rtm; 1714 (void) printf("metric %d, flags:", ifam->ifam_metric); 1715 bprintf(stdout, ifam->ifam_flags, routeflags); 1716 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1717 break; 1718#ifdef RTM_NEWMADDR 1719 case RTM_NEWMADDR: 1720 case RTM_DELMADDR: 1721 REQUIRE(struct ifma_msghdr); 1722 ifmam = (struct ifma_msghdr *)rtm; 1723 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1724 break; 1725#endif 1726 case RTM_IFANNOUNCE: 1727 REQUIRE(struct if_announcemsghdr); 1728 ifan = (struct if_announcemsghdr *)rtm; 1729 (void) printf("if# %d, what: ", ifan->ifan_index); 1730 switch (ifan->ifan_what) { 1731 case IFAN_ARRIVAL: 1732 printf("arrival"); 1733 break; 1734 case IFAN_DEPARTURE: 1735 printf("departure"); 1736 break; 1737 default: 1738 printf("#%d", ifan->ifan_what); 1739 break; 1740 } 1741 printf("\n"); 1742 fflush(stdout); 1743 break; 1744 1745 default: 1746 (void) printf("pid: %ld, seq %d, errno %d, flags:", 1747 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1748 bprintf(stdout, rtm->rtm_flags, routeflags); 1749 pmsg_common(rtm, msglen); 1750 } 1751 1752 return; 1753 1754badlen: 1755 (void)printf(errfmt, __func__, msglen); 1756#undef REQUIRE 1757} 1758 1759static void 1760print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1761{ 1762 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1763 struct sockaddr_dl *ifp = NULL; 1764 struct sockaddr *sa; 1765 char *cp; 1766 int i; 1767 1768 (void) printf(" route to: %s\n", 1769 routename((struct sockaddr *)&so_dst)); 1770 if (rtm->rtm_version != RTM_VERSION) { 1771 warnx("routing message version %d not understood", 1772 rtm->rtm_version); 1773 return; 1774 } 1775 if (rtm->rtm_msglen > msglen) { 1776 warnx("message length mismatch, in packet %d, returned %d", 1777 rtm->rtm_msglen, msglen); 1778 } 1779 if (rtm->rtm_errno) { 1780 errno = rtm->rtm_errno; 1781 warn("message indicates error %d", errno); 1782 return; 1783 } 1784 cp = ((char *)(rtm + 1)); 1785 if (rtm->rtm_addrs) 1786 for (i = 1; i; i <<= 1) 1787 if (i & rtm->rtm_addrs) { 1788 sa = (struct sockaddr *)cp; 1789 switch (i) { 1790 case RTA_DST: 1791 dst = sa; 1792 break; 1793 case RTA_GATEWAY: 1794 gate = sa; 1795 break; 1796 case RTA_NETMASK: 1797 mask = sa; 1798 break; 1799 case RTA_IFP: 1800 if (sa->sa_family == AF_LINK && 1801 ((struct sockaddr_dl *)sa)->sdl_nlen) 1802 ifp = (struct sockaddr_dl *)sa; 1803 break; 1804 } 1805 cp += SA_SIZE(sa); 1806 } 1807 if (dst && mask) 1808 mask->sa_family = dst->sa_family; /* XXX */ 1809 if (dst) 1810 (void)printf("destination: %s\n", routename(dst)); 1811 if (mask) { 1812 int savenflag = nflag; 1813 1814 nflag = 1; 1815 (void)printf(" mask: %s\n", routename(mask)); 1816 nflag = savenflag; 1817 } 1818 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1819 (void)printf(" gateway: %s\n", routename(gate)); 1820 if (fib >= 0) 1821 (void)printf(" fib: %u\n", (unsigned int)fib); 1822 if (ifp) 1823 (void)printf(" interface: %.*s\n", 1824 ifp->sdl_nlen, ifp->sdl_data); 1825 (void)printf(" flags: "); 1826 bprintf(stdout, rtm->rtm_flags, routeflags); 1827 1828#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1829#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1830 1831 (void) printf("\n%s\n", "\ 1832 recvpipe sendpipe ssthresh rtt,msec mtu weight expire"); 1833 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1834 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1835 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1836 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1837 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1838 printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1839 if (rtm->rtm_rmx.rmx_expire) 1840 rtm->rtm_rmx.rmx_expire -= time(0); 1841 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1842#undef lock 1843#undef msec 1844#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1845 if (verbose) 1846 pmsg_common(rtm, msglen); 1847 else if (rtm->rtm_addrs &~ RTA_IGN) { 1848 (void) printf("sockaddrs: "); 1849 bprintf(stdout, rtm->rtm_addrs, addrnames); 1850 putchar('\n'); 1851 } 1852#undef RTA_IGN 1853} 1854 1855static void 1856pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1857{ 1858 (void) printf("\nlocks: "); 1859 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1860 (void) printf(" inits: "); 1861 bprintf(stdout, rtm->rtm_inits, metricnames); 1862 if (msglen > sizeof(struct rt_msghdr)) 1863 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1864 msglen - sizeof(struct rt_msghdr)); 1865 else 1866 (void) fflush(stdout); 1867} 1868 1869static void 1870pmsg_addrs(char *cp, int addrs, size_t len) 1871{ 1872 struct sockaddr *sa; 1873 int i; 1874 1875 if (addrs == 0) { 1876 (void) putchar('\n'); 1877 return; 1878 } 1879 (void) printf("\nsockaddrs: "); 1880 bprintf(stdout, addrs, addrnames); 1881 (void) putchar('\n'); 1882 for (i = 1; i != 0; i <<= 1) 1883 if (i & addrs) { 1884 sa = (struct sockaddr *)cp; 1885 if (len == 0 || len < SA_SIZE(sa)) { 1886 (void) printf(errfmt, __func__, len); 1887 break; 1888 } 1889 (void) printf(" %s", routename(sa)); 1890 len -= SA_SIZE(sa); 1891 cp += SA_SIZE(sa); 1892 } 1893 (void) putchar('\n'); 1894 (void) fflush(stdout); 1895} 1896 1897static void 1898bprintf(FILE *fp, int b, u_char *str) 1899{ 1900 int i; 1901 int gotsome = 0; 1902 1903 if (b == 0) 1904 return; 1905 while ((i = *str++) != 0) { 1906 if (b & (1 << (i-1))) { 1907 if (gotsome == 0) 1908 i = '<'; 1909 else 1910 i = ','; 1911 (void) putc(i, fp); 1912 gotsome = 1; 1913 for (; (i = *str) > 32; str++) 1914 (void) putc(i, fp); 1915 } else 1916 while (*str > 32) 1917 str++; 1918 } 1919 if (gotsome) 1920 (void) putc('>', fp); 1921} 1922 1923int 1924keyword(const char *cp) 1925{ 1926 struct keytab *kt = keywords; 1927 1928 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1929 kt++; 1930 return (kt->kt_i); 1931} 1932 1933static void 1934sodump(sup su, const char *which) 1935{ 1936 switch (su->sa.sa_family) { 1937 case AF_LINK: 1938 (void) printf("%s: link %s; ", 1939 which, link_ntoa(&su->sdl)); 1940 break; 1941 case AF_INET: 1942 (void) printf("%s: inet %s; ", 1943 which, inet_ntoa(su->sin.sin_addr)); 1944 break; 1945 case AF_APPLETALK: 1946 (void) printf("%s: atalk %s; ", 1947 which, atalk_ntoa(su->sat.sat_addr)); 1948 break; 1949 } 1950 (void) fflush(stdout); 1951} 1952 1953/* States*/ 1954#define VIRGIN 0 1955#define GOTONE 1 1956#define GOTTWO 2 1957/* Inputs */ 1958#define DIGIT (4*0) 1959#define END (4*1) 1960#define DELIM (4*2) 1961 1962static void 1963sockaddr(char *addr, struct sockaddr *sa) 1964{ 1965 char *cp = (char *)sa; 1966 int size = sa->sa_len; 1967 char *cplim = cp + size; 1968 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1969 1970 memset(cp, 0, size); 1971 cp++; 1972 do { 1973 if ((*addr >= '0') && (*addr <= '9')) { 1974 new = *addr - '0'; 1975 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1976 new = *addr - 'a' + 10; 1977 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1978 new = *addr - 'A' + 10; 1979 } else if (*addr == '\0') 1980 state |= END; 1981 else 1982 state |= DELIM; 1983 addr++; 1984 switch (state /* | INPUT */) { 1985 case GOTTWO | DIGIT: 1986 *cp++ = byte; /*FALLTHROUGH*/ 1987 case VIRGIN | DIGIT: 1988 state = GOTONE; byte = new; continue; 1989 case GOTONE | DIGIT: 1990 state = GOTTWO; byte = new + (byte << 4); continue; 1991 default: /* | DELIM */ 1992 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1993 case GOTONE | END: 1994 case GOTTWO | END: 1995 *cp++ = byte; /* FALLTHROUGH */ 1996 case VIRGIN | END: 1997 break; 1998 } 1999 break; 2000 } while (cp < cplim); 2001 sa->sa_len = cp - (char *)sa; 2002} 2003 2004static int 2005atalk_aton(const char *text, struct at_addr *addr) 2006{ 2007 u_int net, node; 2008 2009 if (sscanf(text, "%u.%u", &net, &node) != 2 2010 || net > 0xffff || node > 0xff) 2011 return(0); 2012 addr->s_net = htons(net); 2013 addr->s_node = node; 2014 return(1); 2015} 2016 2017static char * 2018atalk_ntoa(struct at_addr at) 2019{ 2020 static char buf[20]; 2021 2022 (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 2023 return(buf); 2024} 2025