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 31 static 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 38 static 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 73 struct keytab { 74 const char *kt_cp; 75 int kt_i; 76 } keywords[] = { 77 #include "keywords.h" 78 {0, 0} 79 }; 80 81 union 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 93 typedef union sockunion *sup; 94 int pid, rtm_addrs; 95 int s; 96 int forcehost, forcenet, doflush, nflag, af, qflag, tflag; 97 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 98 int locking, lockrest, debugonly; 99 struct rt_metrics rt_metrics; 100 u_long rtm_inits; 101 uid_t uid; 102 static int defaultfib; 103 static int numfibs; 104 105 static int atalk_aton(const char *, struct at_addr *); 106 static char *atalk_ntoa(struct at_addr); 107 static void bprintf(FILE *, int, u_char *); 108 static void flushroutes(int argc, char *argv[]); 109 static int flushroutes_fib(int); 110 static int getaddr(int, char *, struct hostent **); 111 static int keyword(const char *); 112 static void inet_makenetandmask(u_long, struct sockaddr_in *, u_long); 113 #ifdef INET6 114 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 115 #endif 116 static void interfaces(void); 117 static void mask_addr(void); 118 static void monitor(int, char*[]); 119 static const char *netname(struct sockaddr *); 120 static void newroute(int, char **); 121 static int newroute_fib(int, char *, int); 122 static void pmsg_addrs(char *, int, size_t); 123 static void pmsg_common(struct rt_msghdr *, size_t); 124 static int prefixlen(const char *); 125 static void print_getmsg(struct rt_msghdr *, int, int); 126 static void print_rtmsg(struct rt_msghdr *, size_t); 127 static const char *routename(struct sockaddr *); 128 static int rtmsg(int, int, int); 129 static void set_metric(char *, int); 130 static int set_sofib(int); 131 static int set_procfib(int); 132 static void sockaddr(char *, struct sockaddr *); 133 static void sodump(sup, const char *); 134 extern char *iso_ntoa(void); 135 136 struct fibl { 137 TAILQ_ENTRY(fibl) fl_next; 138 139 int fl_num; 140 int fl_error; 141 int fl_errno; 142 }; 143 TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 144 145 static int fiboptlist_csv(const char *, struct fibl_head_t *); 146 static int fiboptlist_range(const char *, struct fibl_head_t *); 147 148 static void usage(const char *) __dead2; 149 150 void 151 usage(const char *cp) 152 { 153 if (cp != NULL) 154 warnx("bad keyword: %s", cp); 155 (void) fprintf(stderr, 156 "usage: route [-dnqtv] command [[modifiers] args]\n"); 157 exit(EX_USAGE); 158 /* NOTREACHED */ 159 } 160 161 int 162 main(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, "nqdtv")) != -1) 171 switch(ch) { 172 case 'n': 173 nflag = 1; 174 break; 175 case 'q': 176 qflag = 1; 177 break; 178 case 'v': 179 verbose = 1; 180 break; 181 case 't': 182 tflag = 1; 183 break; 184 case 'd': 185 debugonly = 1; 186 break; 187 case '?': 188 default: 189 usage(NULL); 190 } 191 argc -= optind; 192 argv += optind; 193 194 pid = getpid(); 195 uid = geteuid(); 196 if (tflag) 197 s = open(_PATH_DEVNULL, O_WRONLY, 0); 198 else 199 s = socket(PF_ROUTE, SOCK_RAW, 0); 200 if (s < 0) 201 err(EX_OSERR, "socket"); 202 203 len = sizeof(numfibs); 204 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 205 numfibs = -1; 206 207 len = sizeof(defaultfib); 208 if (numfibs != -1 && 209 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 210 0) == -1) 211 defaultfib = -1; 212 213 if (*argv != NULL) 214 switch (keyword(*argv)) { 215 case K_GET: 216 case K_SHOW: 217 uid = 0; 218 /* FALLTHROUGH */ 219 220 case K_CHANGE: 221 case K_ADD: 222 case K_DEL: 223 case K_DELETE: 224 newroute(argc, argv); 225 /* NOTREACHED */ 226 227 case K_MONITOR: 228 monitor(argc, argv); 229 /* NOTREACHED */ 230 231 case K_FLUSH: 232 flushroutes(argc, argv); 233 exit(0); 234 /* NOTREACHED */ 235 } 236 usage(*argv); 237 /* NOTREACHED */ 238 } 239 240 static int 241 set_sofib(int fib) 242 { 243 244 if (fib < 0) 245 return (0); 246 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 247 sizeof(fib))); 248 } 249 250 static int 251 set_procfib(int fib) 252 { 253 254 if (fib < 0) 255 return (0); 256 return (setfib(fib)); 257 } 258 259 static int 260 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 261 { 262 struct fibl *fl; 263 char *str, *token, *endptr; 264 int fib[2], i, error; 265 266 str = strdup(arg); 267 error = 0; 268 i = 0; 269 while ((token = strsep(&str, "-")) != NULL) { 270 switch (i) { 271 case 0: 272 case 1: 273 fib[i] = strtol(token, &endptr, 0); 274 if (*endptr != '\0' || (fib[i] == 0 && 275 (errno == EINVAL || errno == ERANGE))) 276 error = 1; 277 break; 278 default: 279 error = 1; 280 } 281 if (error) 282 goto fiboptlist_range_ret; 283 i++; 284 } 285 if (fib[0] >= fib[1]) { 286 error = 1; 287 goto fiboptlist_range_ret; 288 } 289 for (i = fib[0]; i <= fib[1]; i++) { 290 fl = calloc(1, sizeof(*fl)); 291 if (fl == NULL) { 292 error = 1; 293 goto fiboptlist_range_ret; 294 } 295 fl->fl_num = i; 296 TAILQ_INSERT_TAIL(flh, fl, fl_next); 297 } 298 fiboptlist_range_ret: 299 free(str); 300 return (error); 301 } 302 303 #define ALLSTRLEN 64 304 static int 305 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 306 { 307 struct fibl *fl; 308 char *str, *token, *endptr; 309 int fib, error; 310 311 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 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 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 fib = strtol(token, &endptr, 0); 339 if (*endptr != '\0' || (fib == 0 && 340 (errno == EINVAL || errno == ERANGE))) { 341 error = 1; 342 goto fiboptlist_csv_ret; 343 } 344 fl = calloc(1, sizeof(*fl)); 345 if (fl == NULL) { 346 error = 1; 347 goto fiboptlist_csv_ret; 348 } 349 fl->fl_num = fib; 350 TAILQ_INSERT_TAIL(flh, fl, fl_next); 351 } 352 } 353 fiboptlist_csv_ret: 354 free(str); 355 return (error); 356 } 357 358 /* 359 * Purge all entries in the routing tables not 360 * associated with network interfaces. 361 */ 362 static void 363 flushroutes(int argc, char *argv[]) 364 { 365 struct fibl *fl; 366 int error; 367 368 if (uid != 0 && !debugonly) { 369 errx(EX_NOPERM, "must be root to alter routing table"); 370 } 371 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 372 373 TAILQ_INIT(&fibl_head); 374 while (argc > 1) { 375 argc--; 376 argv++; 377 if (**argv != '-') 378 usage(*argv); 379 switch (keyword(*argv + 1)) { 380 case K_INET: 381 af = AF_INET; 382 break; 383 #ifdef INET6 384 case K_INET6: 385 af = AF_INET6; 386 break; 387 #endif 388 case K_ATALK: 389 af = AF_APPLETALK; 390 break; 391 case K_LINK: 392 af = AF_LINK; 393 break; 394 case K_FIB: 395 if (!--argc) 396 usage(*argv); 397 error = fiboptlist_csv(*++argv, &fibl_head); 398 if (error) 399 usage(*argv); 400 break; 401 default: 402 usage(*argv); 403 } 404 } 405 if (TAILQ_EMPTY(&fibl_head)) { 406 error = fiboptlist_csv("default", &fibl_head); 407 if (error) 408 errx(EX_OSERR, "fiboptlist_csv failed."); 409 } 410 TAILQ_FOREACH(fl, &fibl_head, fl_next) 411 flushroutes_fib(fl->fl_num); 412 } 413 414 static int 415 flushroutes_fib(int fib) 416 { 417 struct rt_msghdr *rtm; 418 size_t needed; 419 char *buf, *next, *lim; 420 int mib[6], rlen, seqno, count = 0; 421 int error; 422 423 error = set_sofib(fib); 424 error += set_procfib(fib); 425 if (error) { 426 warn("fib number %d is ignored", fib); 427 return (error); 428 } 429 430 retry: 431 mib[0] = CTL_NET; 432 mib[1] = PF_ROUTE; 433 mib[2] = 0; /* protocol */ 434 mib[3] = 0; /* wildcard address family */ 435 mib[4] = NET_RT_DUMP; 436 mib[5] = 0; /* no flags */ 437 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 438 err(EX_OSERR, "route-sysctl-estimate"); 439 if ((buf = malloc(needed)) == NULL) 440 errx(EX_OSERR, "malloc failed"); 441 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 442 if (errno == ENOMEM && count++ < 10) { 443 warnx("Routing table grew, retrying"); 444 sleep(1); 445 free(buf); 446 goto retry; 447 } 448 err(EX_OSERR, "route-sysctl-get"); 449 } 450 lim = buf + needed; 451 if (verbose) 452 (void) printf("Examining routing table from sysctl\n"); 453 seqno = 0; /* ??? */ 454 for (next = buf; next < lim; next += rtm->rtm_msglen) { 455 rtm = (struct rt_msghdr *)next; 456 if (verbose) 457 print_rtmsg(rtm, rtm->rtm_msglen); 458 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 459 continue; 460 if (af != 0) { 461 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 462 463 if (sa->sa_family != af) 464 continue; 465 } 466 if (debugonly) 467 continue; 468 rtm->rtm_type = RTM_DELETE; 469 rtm->rtm_seq = seqno; 470 rlen = write(s, next, rtm->rtm_msglen); 471 if (rlen < 0 && errno == EPERM) 472 err(1, "write to routing socket"); 473 if (rlen < (int)rtm->rtm_msglen) { 474 warn("write to routing socket"); 475 (void) printf("got only %d for rlen\n", rlen); 476 free(buf); 477 goto retry; 478 break; 479 } 480 seqno++; 481 if (qflag) 482 continue; 483 if (verbose) 484 print_rtmsg(rtm, rlen); 485 else { 486 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 487 488 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 489 routename(sa) : netname(sa)); 490 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 491 printf("%-20.20s ", routename(sa)); 492 if (fib >= 0) 493 printf("-fib %-3d ", fib); 494 printf("done\n"); 495 } 496 } 497 return (error); 498 } 499 500 const char * 501 routename(struct sockaddr *sa) 502 { 503 const char *cp; 504 static char line[MAXHOSTNAMELEN + 1]; 505 struct hostent *hp; 506 static char domain[MAXHOSTNAMELEN + 1]; 507 static int first = 1, n; 508 509 if (first) { 510 first = 0; 511 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 512 (cp = strchr(domain, '.'))) { 513 domain[MAXHOSTNAMELEN] = '\0'; 514 (void) strcpy(domain, cp + 1); 515 } else 516 domain[0] = 0; 517 } 518 519 if (sa->sa_len == 0) 520 strcpy(line, "default"); 521 else switch (sa->sa_family) { 522 523 case AF_INET: 524 { struct in_addr in; 525 in = ((struct sockaddr_in *)sa)->sin_addr; 526 527 cp = NULL; 528 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 529 cp = "default"; 530 if (cp == NULL && !nflag) { 531 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 532 AF_INET); 533 if (hp != NULL) { 534 char *cptr; 535 cptr = strchr(hp->h_name, '.'); 536 if (cptr != NULL && 537 strcmp(cptr + 1, domain) == 0) 538 *cptr = '\0'; 539 cp = hp->h_name; 540 } 541 } 542 if (cp != NULL) { 543 strncpy(line, cp, sizeof(line) - 1); 544 line[sizeof(line) - 1] = '\0'; 545 } else 546 (void) sprintf(line, "%s", inet_ntoa(in)); 547 break; 548 } 549 550 #ifdef INET6 551 case AF_INET6: 552 { 553 struct sockaddr_in6 sin6; /* use static var for safety */ 554 int niflags = 0; 555 556 memset(&sin6, 0, sizeof(sin6)); 557 memcpy(&sin6, sa, sa->sa_len); 558 sin6.sin6_len = sizeof(struct sockaddr_in6); 559 sin6.sin6_family = AF_INET6; 560 if (nflag) 561 niflags |= NI_NUMERICHOST; 562 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 563 line, sizeof(line), NULL, 0, niflags) != 0) 564 strncpy(line, "invalid", sizeof(line)); 565 566 return(line); 567 } 568 #endif 569 570 case AF_APPLETALK: 571 (void) snprintf(line, sizeof(line), "atalk %s", 572 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 573 break; 574 575 case AF_LINK: 576 return (link_ntoa((struct sockaddr_dl *)sa)); 577 578 default: 579 { 580 u_short *sp = (u_short *)sa; 581 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 582 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 583 char *cpe = line + sizeof(line); 584 585 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 586 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 587 cps += n; 588 else 589 *cps = '\0'; 590 break; 591 } 592 } 593 return (line); 594 } 595 596 /* 597 * Return the name of the network whose address is given. 598 * The address is assumed to be that of a net, not a host. 599 */ 600 const char * 601 netname(struct sockaddr *sa) 602 { 603 const char *cp = NULL; 604 static char line[MAXHOSTNAMELEN + 1]; 605 struct netent *np = NULL; 606 u_long i; 607 int n; 608 609 switch (sa->sa_family) { 610 611 case AF_INET: 612 { struct in_addr in; 613 in = ((struct sockaddr_in *)sa)->sin_addr; 614 615 i = in.s_addr = ntohl(in.s_addr); 616 if (in.s_addr == 0) 617 cp = "default"; 618 else if (!nflag) { 619 np = getnetbyaddr(i, AF_INET); 620 if (np != NULL) 621 cp = np->n_name; 622 } 623 #define C(x) (unsigned)((x) & 0xff) 624 if (cp != NULL) 625 strncpy(line, cp, sizeof(line)); 626 else if ((in.s_addr & 0xffffff) == 0) 627 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 628 else if ((in.s_addr & 0xffff) == 0) 629 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 630 C(in.s_addr >> 16)); 631 else if ((in.s_addr & 0xff) == 0) 632 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 633 C(in.s_addr >> 16), C(in.s_addr >> 8)); 634 else 635 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 636 C(in.s_addr >> 16), C(in.s_addr >> 8), 637 C(in.s_addr)); 638 #undef C 639 break; 640 } 641 642 #ifdef INET6 643 case AF_INET6: 644 { 645 struct sockaddr_in6 sin6; /* use static var for safety */ 646 int niflags = 0; 647 648 memset(&sin6, 0, sizeof(sin6)); 649 memcpy(&sin6, sa, sa->sa_len); 650 sin6.sin6_len = sizeof(struct sockaddr_in6); 651 sin6.sin6_family = AF_INET6; 652 if (nflag) 653 niflags |= NI_NUMERICHOST; 654 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 655 line, sizeof(line), NULL, 0, niflags) != 0) 656 strncpy(line, "invalid", sizeof(line)); 657 658 return(line); 659 } 660 #endif 661 662 case AF_APPLETALK: 663 (void) snprintf(line, sizeof(line), "atalk %s", 664 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 665 break; 666 667 case AF_LINK: 668 return (link_ntoa((struct sockaddr_dl *)sa)); 669 670 671 default: 672 { 673 u_short *sp = (u_short *)sa->sa_data; 674 u_short *splim = sp + ((sa->sa_len + 1)>>1); 675 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 676 char *cpe = line + sizeof(line); 677 678 while (sp < splim && cps < cpe) 679 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 680 cps += n; 681 else 682 *cps = '\0'; 683 break; 684 } 685 } 686 return (line); 687 } 688 689 static void 690 set_metric(char *value, int key) 691 { 692 int flag = 0; 693 u_long noval, *valp = &noval; 694 695 switch (key) { 696 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 697 caseof(K_MTU, RTV_MTU, rmx_mtu); 698 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 699 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 700 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 701 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 702 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 703 caseof(K_RTT, RTV_RTT, rmx_rtt); 704 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 705 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 706 } 707 rtm_inits |= flag; 708 if (lockrest || locking) 709 rt_metrics.rmx_locks |= flag; 710 if (locking) 711 locking = 0; 712 *valp = atoi(value); 713 } 714 715 #define F_ISHOST 0x01 716 #define F_FORCENET 0x02 717 #define F_FORCEHOST 0x04 718 #define F_PROXY 0x08 719 #define F_INTERFACE 0x10 720 721 static void 722 newroute(int argc, char **argv) 723 { 724 struct hostent *hp; 725 struct fibl *fl; 726 char *cmd; 727 const char *dest, *gateway, *errmsg; 728 int key, error, flags, nrflags, fibnum; 729 730 if (uid != 0) { 731 errx(EX_NOPERM, "must be root to alter routing table"); 732 } 733 734 dest = NULL; 735 gateway = NULL; 736 flags = RTF_STATIC; 737 nrflags = 0; 738 hp = NULL; 739 TAILQ_INIT(&fibl_head); 740 741 cmd = argv[0]; 742 if (*cmd != 'g' && *cmd != 's') 743 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 744 745 while (--argc > 0) { 746 if (**(++argv)== '-') { 747 switch (key = keyword(1 + *argv)) { 748 case K_LINK: 749 af = AF_LINK; 750 aflen = sizeof(struct sockaddr_dl); 751 break; 752 case K_INET: 753 af = AF_INET; 754 aflen = sizeof(struct sockaddr_in); 755 break; 756 #ifdef INET6 757 case K_INET6: 758 af = AF_INET6; 759 aflen = sizeof(struct sockaddr_in6); 760 break; 761 #endif 762 case K_ATALK: 763 af = AF_APPLETALK; 764 aflen = sizeof(struct sockaddr_at); 765 break; 766 case K_SA: 767 af = PF_ROUTE; 768 aflen = sizeof(union sockunion); 769 break; 770 case K_IFACE: 771 case K_INTERFACE: 772 nrflags |= F_INTERFACE; 773 break; 774 case K_NOSTATIC: 775 flags &= ~RTF_STATIC; 776 break; 777 case K_LOCK: 778 locking = 1; 779 break; 780 case K_LOCKREST: 781 lockrest = 1; 782 break; 783 case K_HOST: 784 nrflags |= F_FORCEHOST; 785 break; 786 case K_REJECT: 787 flags |= RTF_REJECT; 788 break; 789 case K_BLACKHOLE: 790 flags |= RTF_BLACKHOLE; 791 break; 792 case K_PROTO1: 793 flags |= RTF_PROTO1; 794 break; 795 case K_PROTO2: 796 flags |= RTF_PROTO2; 797 break; 798 case K_PROXY: 799 nrflags |= F_PROXY; 800 break; 801 case K_XRESOLVE: 802 flags |= RTF_XRESOLVE; 803 break; 804 case K_STATIC: 805 flags |= RTF_STATIC; 806 break; 807 case K_STICKY: 808 flags |= RTF_STICKY; 809 break; 810 case K_NOSTICK: 811 flags &= ~RTF_STICKY; 812 break; 813 case K_FIB: 814 if (!--argc) 815 usage(NULL); 816 error = fiboptlist_csv(*++argv, &fibl_head); 817 if (error) 818 usage(NULL); 819 break; 820 case K_IFA: 821 if (!--argc) 822 usage(NULL); 823 (void) getaddr(RTA_IFA, *++argv, 0); 824 break; 825 case K_IFP: 826 if (!--argc) 827 usage(NULL); 828 (void) getaddr(RTA_IFP, *++argv, 0); 829 break; 830 case K_GENMASK: 831 if (!--argc) 832 usage(NULL); 833 (void) getaddr(RTA_GENMASK, *++argv, 0); 834 break; 835 case K_GATEWAY: 836 if (!--argc) 837 usage(NULL); 838 (void) getaddr(RTA_GATEWAY, *++argv, 0); 839 break; 840 case K_DST: 841 if (!--argc) 842 usage(NULL); 843 if (getaddr(RTA_DST, *++argv, &hp)) 844 nrflags |= F_ISHOST; 845 dest = *argv; 846 break; 847 case K_NETMASK: 848 if (!--argc) 849 usage(NULL); 850 (void) getaddr(RTA_NETMASK, *++argv, 0); 851 /* FALLTHROUGH */ 852 case K_NET: 853 nrflags |= F_FORCENET; 854 break; 855 case K_PREFIXLEN: 856 if (!--argc) 857 usage(NULL); 858 if (prefixlen(*++argv) == -1) { 859 nrflags &= ~F_FORCENET; 860 nrflags |= F_ISHOST; 861 } else { 862 nrflags |= F_FORCENET; 863 nrflags &= ~F_ISHOST; 864 } 865 break; 866 case K_MTU: 867 case K_HOPCOUNT: 868 case K_EXPIRE: 869 case K_RECVPIPE: 870 case K_SENDPIPE: 871 case K_SSTHRESH: 872 case K_RTT: 873 case K_RTTVAR: 874 case K_WEIGHT: 875 if (!--argc) 876 usage(NULL); 877 set_metric(*++argv, key); 878 break; 879 default: 880 usage(1+*argv); 881 } 882 } else { 883 if ((rtm_addrs & RTA_DST) == 0) { 884 dest = *argv; 885 if (getaddr(RTA_DST, *argv, &hp)) 886 nrflags |= F_ISHOST; 887 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 888 gateway = *argv; 889 (void) getaddr(RTA_GATEWAY, *argv, &hp); 890 } else { 891 (void) getaddr(RTA_NETMASK, *argv, 0); 892 nrflags |= F_FORCENET; 893 } 894 } 895 } 896 897 if (nrflags & F_FORCEHOST) { 898 nrflags |= F_ISHOST; 899 #ifdef INET6 900 if (af == AF_INET6) { 901 rtm_addrs &= ~RTA_NETMASK; 902 memset((void *)&so_mask, 0, sizeof(so_mask)); 903 } 904 #endif 905 } 906 if (nrflags & F_FORCENET) 907 nrflags &= ~F_ISHOST; 908 flags |= RTF_UP; 909 if (nrflags & F_ISHOST) 910 flags |= RTF_HOST; 911 if ((nrflags & F_INTERFACE) == 0) 912 flags |= RTF_GATEWAY; 913 if (nrflags & F_PROXY) { 914 so_dst.sinarp.sin_other = SIN_PROXY; 915 flags |= RTF_ANNOUNCE; 916 } 917 if (dest == NULL) 918 dest = ""; 919 if (gateway == NULL) 920 gateway = ""; 921 922 if (TAILQ_EMPTY(&fibl_head)) { 923 error = fiboptlist_csv("default", &fibl_head); 924 if (error) 925 errx(EX_OSERR, "fiboptlist_csv failed."); 926 } 927 error = 0; 928 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 929 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 930 if (fl->fl_error) 931 fl->fl_errno = errno; 932 error += fl->fl_error; 933 } 934 if (*cmd == 'g' || *cmd == 's') 935 exit(error); 936 937 error = 0; 938 if (!qflag) { 939 fibnum = 0; 940 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 941 if (fl->fl_error == 0) 942 fibnum++; 943 } 944 if (fibnum > 0) { 945 int firstfib = 1; 946 947 printf("%s %s %s", cmd, 948 (nrflags & F_ISHOST) ? "host" : "net", dest); 949 if (*gateway) 950 printf(": gateway %s", gateway); 951 952 if (numfibs > 1) { 953 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 954 if (fl->fl_error == 0 955 && fl->fl_num >= 0) { 956 if (firstfib) { 957 printf(" fib "); 958 firstfib = 0; 959 } 960 printf("%d", fl->fl_num); 961 if (fibnum-- > 1) 962 printf(","); 963 } 964 } 965 } 966 printf("\n"); 967 } 968 969 fibnum = 0; 970 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 971 if (fl->fl_error != 0) { 972 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 973 ? "host" : "net", dest); 974 if (*gateway) 975 printf(": gateway %s", gateway); 976 977 if (fl->fl_num >= 0) 978 printf(" fib %d", fl->fl_num); 979 980 switch (fl->fl_errno) { 981 case ESRCH: 982 errmsg = "not in table"; 983 break; 984 case EBUSY: 985 errmsg = "entry in use"; 986 break; 987 case ENOBUFS: 988 errmsg = "not enough memory"; 989 break; 990 case EADDRINUSE: 991 /* 992 * handle recursion avoidance 993 * in rt_setgate() 994 */ 995 errmsg = "gateway uses the same route"; 996 break; 997 case EEXIST: 998 errmsg = "route already in table"; 999 break; 1000 default: 1001 errmsg = strerror(fl->fl_errno); 1002 break; 1003 } 1004 printf(": %s\n", errmsg); 1005 error = 1; 1006 } 1007 } 1008 } 1009 exit(error); 1010 } 1011 1012 static int 1013 newroute_fib(int fib, char *cmd, int flags) 1014 { 1015 int error; 1016 1017 error = set_sofib(fib); 1018 if (error) { 1019 warn("fib number %d is ignored", fib); 1020 return (error); 1021 } 1022 1023 error = rtmsg(*cmd, flags, fib); 1024 return (error); 1025 } 1026 1027 static void 1028 inet_makenetandmask(u_long net, struct sockaddr_in *sin, u_long bits) 1029 { 1030 u_long mask = 0; 1031 char *cp; 1032 1033 rtm_addrs |= RTA_NETMASK; 1034 1035 /* 1036 * If no /xx was specified we must calculate the 1037 * CIDR address. 1038 */ 1039 if ((bits == 0) && (net != 0)) { 1040 u_long i, j; 1041 for(i=0,j=0xff; i<4; i++) { 1042 if (net & j) { 1043 break; 1044 } 1045 j <<= 8; 1046 } 1047 /* i holds the first non zero bit */ 1048 bits = 32 - (i*8); 1049 } 1050 if (bits != 0) 1051 mask = 0xffffffff << (32 - bits); 1052 1053 sin->sin_addr.s_addr = htonl(net); 1054 sin = &so_mask.sin; 1055 sin->sin_addr.s_addr = htonl(mask); 1056 sin->sin_len = 0; 1057 sin->sin_family = 0; 1058 cp = (char *)(&sin->sin_addr + 1); 1059 while (*--cp == 0 && cp > (char *)sin) 1060 ; 1061 sin->sin_len = 1 + cp - (char *)sin; 1062 } 1063 1064 #ifdef INET6 1065 /* 1066 * XXX the function may need more improvement... 1067 */ 1068 static int 1069 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1070 { 1071 struct in6_addr in6; 1072 1073 if (plen == NULL) { 1074 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1075 sin6->sin6_scope_id == 0) { 1076 plen = "0"; 1077 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1078 /* aggregatable global unicast - RFC2374 */ 1079 memset(&in6, 0, sizeof(in6)); 1080 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 1081 &in6.s6_addr[8], 8)) 1082 plen = "64"; 1083 } 1084 } 1085 1086 if (plen == NULL || strcmp(plen, "128") == 0) 1087 return (1); 1088 rtm_addrs |= RTA_NETMASK; 1089 prefixlen(plen); 1090 return (0); 1091 } 1092 #endif 1093 1094 /* 1095 * Interpret an argument as a network address of some kind, 1096 * returning 1 if a host address, 0 if a network address. 1097 */ 1098 static int 1099 getaddr(int which, char *str, struct hostent **hpp) 1100 { 1101 sup su; 1102 struct hostent *hp; 1103 struct netent *np; 1104 u_long val; 1105 char *q; 1106 int afamily; /* local copy of af so we can change it */ 1107 1108 if (af == 0) { 1109 af = AF_INET; 1110 aflen = sizeof(struct sockaddr_in); 1111 } 1112 afamily = af; 1113 rtm_addrs |= which; 1114 switch (which) { 1115 case RTA_DST: 1116 su = &so_dst; 1117 break; 1118 case RTA_GATEWAY: 1119 su = &so_gate; 1120 if (iflag) { 1121 struct ifaddrs *ifap, *ifa; 1122 struct sockaddr_dl *sdl = NULL; 1123 1124 if (getifaddrs(&ifap)) 1125 err(1, "getifaddrs"); 1126 1127 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1128 if (ifa->ifa_addr->sa_family != AF_LINK) 1129 continue; 1130 1131 if (strcmp(str, ifa->ifa_name) != 0) 1132 continue; 1133 1134 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1135 } 1136 /* If we found it, then use it */ 1137 if (sdl != NULL) { 1138 /* 1139 * Copy is safe since we have a 1140 * sockaddr_storage member in sockunion{}. 1141 * Note that we need to copy before calling 1142 * freeifaddrs(). 1143 */ 1144 memcpy(&su->sdl, sdl, sdl->sdl_len); 1145 } 1146 freeifaddrs(ifap); 1147 if (sdl != NULL) 1148 return(1); 1149 } 1150 break; 1151 case RTA_NETMASK: 1152 su = &so_mask; 1153 break; 1154 case RTA_GENMASK: 1155 su = &so_genmask; 1156 break; 1157 case RTA_IFP: 1158 su = &so_ifp; 1159 afamily = AF_LINK; 1160 break; 1161 case RTA_IFA: 1162 su = &so_ifa; 1163 break; 1164 default: 1165 usage("internal error"); 1166 /*NOTREACHED*/ 1167 } 1168 su->sa.sa_len = aflen; 1169 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1170 if (strcmp(str, "default") == 0) { 1171 /* 1172 * Default is net 0.0.0.0/0 1173 */ 1174 switch (which) { 1175 case RTA_DST: 1176 forcenet++; 1177 #if 0 1178 bzero(su, sizeof(*su)); /* for readability */ 1179 #endif 1180 getaddr(RTA_NETMASK, str, 0); 1181 break; 1182 #if 0 1183 case RTA_NETMASK: 1184 case RTA_GENMASK: 1185 bzero(su, sizeof(*su)); /* for readability */ 1186 #endif 1187 } 1188 return (0); 1189 } 1190 switch (afamily) { 1191 #ifdef INET6 1192 case AF_INET6: 1193 { 1194 struct addrinfo hints, *res; 1195 int ecode; 1196 1197 q = NULL; 1198 if (which == RTA_DST && (q = strchr(str, '/')) != NULL) 1199 *q = '\0'; 1200 memset(&hints, 0, sizeof(hints)); 1201 hints.ai_family = afamily; /*AF_INET6*/ 1202 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1203 ecode = getaddrinfo(str, NULL, &hints, &res); 1204 if (ecode != 0 || res->ai_family != AF_INET6 || 1205 res->ai_addrlen != sizeof(su->sin6)) { 1206 (void) fprintf(stderr, "%s: %s\n", str, 1207 gai_strerror(ecode)); 1208 exit(1); 1209 } 1210 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1211 freeaddrinfo(res); 1212 if (q != NULL) 1213 *q++ = '/'; 1214 if (which == RTA_DST) 1215 return (inet6_makenetandmask(&su->sin6, q)); 1216 return (0); 1217 } 1218 #endif /* INET6 */ 1219 1220 case AF_APPLETALK: 1221 if (!atalk_aton(str, &su->sat.sat_addr)) 1222 errx(EX_NOHOST, "bad address: %s", str); 1223 rtm_addrs |= RTA_NETMASK; 1224 return(forcehost || su->sat.sat_addr.s_node != 0); 1225 1226 case AF_LINK: 1227 link_addr(str, &su->sdl); 1228 return (1); 1229 1230 1231 case PF_ROUTE: 1232 su->sa.sa_len = sizeof(*su); 1233 sockaddr(str, &su->sa); 1234 return (1); 1235 1236 case AF_INET: 1237 default: 1238 break; 1239 } 1240 1241 if (hpp == NULL) 1242 hpp = &hp; 1243 *hpp = NULL; 1244 1245 q = strchr(str,'/'); 1246 if (q != NULL && which == RTA_DST) { 1247 *q = '\0'; 1248 if ((val = inet_network(str)) != INADDR_NONE) { 1249 inet_makenetandmask( 1250 val, &su->sin, strtoul(q+1, 0, 0)); 1251 return (0); 1252 } 1253 *q = '/'; 1254 } 1255 if ((which != RTA_DST || forcenet == 0) && 1256 inet_aton(str, &su->sin.sin_addr)) { 1257 val = su->sin.sin_addr.s_addr; 1258 if (which != RTA_DST || forcehost || 1259 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1260 return (1); 1261 else { 1262 val = ntohl(val); 1263 goto netdone; 1264 } 1265 } 1266 if (which == RTA_DST && forcehost == 0 && 1267 ((val = inet_network(str)) != INADDR_NONE || 1268 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1269 netdone: 1270 inet_makenetandmask(val, &su->sin, 0); 1271 return (0); 1272 } 1273 hp = gethostbyname(str); 1274 if (hp != NULL) { 1275 *hpp = hp; 1276 su->sin.sin_family = hp->h_addrtype; 1277 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1278 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr))); 1279 return (1); 1280 } 1281 errx(EX_NOHOST, "bad address: %s", str); 1282 } 1283 1284 static int 1285 prefixlen(const char *str) 1286 { 1287 int len = atoi(str), q, r; 1288 int max; 1289 char *p; 1290 1291 rtm_addrs |= RTA_NETMASK; 1292 switch (af) { 1293 #ifdef INET6 1294 case AF_INET6: 1295 max = 128; 1296 p = (char *)&so_mask.sin6.sin6_addr; 1297 break; 1298 #endif 1299 case AF_INET: 1300 max = 32; 1301 p = (char *)&so_mask.sin.sin_addr; 1302 break; 1303 default: 1304 fprintf(stderr, "prefixlen not supported in this af\n"); 1305 exit(1); 1306 } 1307 1308 if (len < 0 || max < len) { 1309 fprintf(stderr, "%s: bad value\n", str); 1310 exit(1); 1311 } 1312 1313 q = len >> 3; 1314 r = len & 7; 1315 so_mask.sa.sa_family = af; 1316 so_mask.sa.sa_len = aflen; 1317 memset((void *)p, 0, max / 8); 1318 if (q > 0) 1319 memset((void *)p, 0xff, q); 1320 if (r > 0) 1321 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1322 if (len == max) 1323 return (-1); 1324 else 1325 return (len); 1326 } 1327 1328 static void 1329 interfaces(void) 1330 { 1331 size_t needed; 1332 int mib[6]; 1333 char *buf, *lim, *next, count = 0; 1334 struct rt_msghdr *rtm; 1335 1336 retry2: 1337 mib[0] = CTL_NET; 1338 mib[1] = PF_ROUTE; 1339 mib[2] = 0; /* protocol */ 1340 mib[3] = 0; /* wildcard address family */ 1341 mib[4] = NET_RT_IFLIST; 1342 mib[5] = 0; /* no flags */ 1343 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1344 err(EX_OSERR, "route-sysctl-estimate"); 1345 if ((buf = malloc(needed)) == NULL) 1346 errx(EX_OSERR, "malloc failed"); 1347 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 1348 if (errno == ENOMEM && count++ < 10) { 1349 warnx("Routing table grew, retrying"); 1350 sleep(1); 1351 free(buf); 1352 goto retry2; 1353 } 1354 err(EX_OSERR, "actual retrieval of interface table"); 1355 } 1356 lim = buf + needed; 1357 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1358 rtm = (struct rt_msghdr *)next; 1359 print_rtmsg(rtm, rtm->rtm_msglen); 1360 } 1361 } 1362 1363 static void 1364 monitor(int argc, char *argv[]) 1365 { 1366 int n, fib, error; 1367 char msg[2048], *endptr; 1368 1369 fib = defaultfib; 1370 while (argc > 1) { 1371 argc--; 1372 argv++; 1373 if (**argv != '-') 1374 usage(*argv); 1375 switch (keyword(*argv + 1)) { 1376 case K_FIB: 1377 if (!--argc) 1378 usage(*argv); 1379 fib = strtol(*++argv, &endptr, 0); 1380 if (*endptr != '\0' || (fib == 0 && 1381 (errno == EINVAL || errno == ERANGE))) 1382 usage(*argv); 1383 break; 1384 default: 1385 usage(*argv); 1386 } 1387 } 1388 error = set_sofib(fib); 1389 if (error) 1390 errx(EX_USAGE, "invalid fib number: %d", fib); 1391 1392 verbose = 1; 1393 if (debugonly) { 1394 interfaces(); 1395 exit(0); 1396 } 1397 for (;;) { 1398 time_t now; 1399 n = read(s, msg, 2048); 1400 now = time(NULL); 1401 (void) printf("\ngot message of size %d on %s", n, ctime(&now)); 1402 print_rtmsg((struct rt_msghdr *)msg, n); 1403 } 1404 } 1405 1406 struct { 1407 struct rt_msghdr m_rtm; 1408 char m_space[512]; 1409 } m_rtmsg; 1410 1411 static int 1412 rtmsg(int cmd, int flags, int fib) 1413 { 1414 static int seq; 1415 int rlen; 1416 char *cp = m_rtmsg.m_space; 1417 int l; 1418 1419 #define NEXTADDR(w, u) \ 1420 if (rtm_addrs & (w)) {\ 1421 l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\ 1422 if (verbose) sodump(&(u),#u);\ 1423 } 1424 1425 errno = 0; 1426 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1427 if (cmd == 'a') 1428 cmd = RTM_ADD; 1429 else if (cmd == 'c') 1430 cmd = RTM_CHANGE; 1431 else if (cmd == 'g' || cmd == 's') { 1432 cmd = RTM_GET; 1433 if (so_ifp.sa.sa_family == 0) { 1434 so_ifp.sa.sa_family = AF_LINK; 1435 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1436 rtm_addrs |= RTA_IFP; 1437 } 1438 } else 1439 cmd = RTM_DELETE; 1440 #define rtm m_rtmsg.m_rtm 1441 rtm.rtm_type = cmd; 1442 rtm.rtm_flags = flags; 1443 rtm.rtm_version = RTM_VERSION; 1444 rtm.rtm_seq = ++seq; 1445 rtm.rtm_addrs = rtm_addrs; 1446 rtm.rtm_rmx = rt_metrics; 1447 rtm.rtm_inits = rtm_inits; 1448 1449 if (rtm_addrs & RTA_NETMASK) 1450 mask_addr(); 1451 NEXTADDR(RTA_DST, so_dst); 1452 NEXTADDR(RTA_GATEWAY, so_gate); 1453 NEXTADDR(RTA_NETMASK, so_mask); 1454 NEXTADDR(RTA_GENMASK, so_genmask); 1455 NEXTADDR(RTA_IFP, so_ifp); 1456 NEXTADDR(RTA_IFA, so_ifa); 1457 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1458 if (verbose) 1459 print_rtmsg(&rtm, l); 1460 if (debugonly) 1461 return (0); 1462 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1463 if (errno == EPERM) 1464 err(1, "writing to routing socket"); 1465 warn("writing to routing socket"); 1466 return (-1); 1467 } 1468 if (cmd == RTM_GET) { 1469 do { 1470 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1471 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1472 if (l < 0) 1473 warn("read from routing socket"); 1474 else 1475 print_getmsg(&rtm, l, fib); 1476 } 1477 #undef rtm 1478 return (0); 1479 } 1480 1481 static void 1482 mask_addr(void) 1483 { 1484 int olen = so_mask.sa.sa_len; 1485 char *cp1 = olen + (char *)&so_mask, *cp2; 1486 1487 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1488 if (*--cp1 != 0) { 1489 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1490 break; 1491 } 1492 if ((rtm_addrs & RTA_DST) == 0) 1493 return; 1494 switch (so_dst.sa.sa_family) { 1495 case AF_INET: 1496 #ifdef INET6 1497 case AF_INET6: 1498 #endif 1499 case AF_APPLETALK: 1500 case 0: 1501 return; 1502 } 1503 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1504 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1505 while (cp2 > cp1) 1506 *--cp2 = 0; 1507 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1508 while (cp1 > so_dst.sa.sa_data) 1509 *--cp1 &= *--cp2; 1510 } 1511 1512 const char *msgtypes[] = { 1513 "", 1514 "RTM_ADD: Add Route", 1515 "RTM_DELETE: Delete Route", 1516 "RTM_CHANGE: Change Metrics or flags", 1517 "RTM_GET: Report Metrics", 1518 "RTM_LOSING: Kernel Suspects Partitioning", 1519 "RTM_REDIRECT: Told to use different route", 1520 "RTM_MISS: Lookup failed on this address", 1521 "RTM_LOCK: fix specified metrics", 1522 "RTM_OLDADD: caused by SIOCADDRT", 1523 "RTM_OLDDEL: caused by SIOCDELRT", 1524 "RTM_RESOLVE: Route created by cloning", 1525 "RTM_NEWADDR: address being added to iface", 1526 "RTM_DELADDR: address being removed from iface", 1527 "RTM_IFINFO: iface status change", 1528 "RTM_NEWMADDR: new multicast group membership on iface", 1529 "RTM_DELMADDR: multicast group membership removed from iface", 1530 "RTM_IFANNOUNCE: interface arrival/departure", 1531 "RTM_IEEE80211: IEEE 802.11 wireless event", 1532 }; 1533 1534 char metricnames[] = 1535 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1536 "\1mtu"; 1537 char routeflags[] = 1538 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1539 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1540 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1541 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1542 char ifnetflags[] = 1543 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1544 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1545 "\017LINK2\020MULTICAST"; 1546 char addrnames[] = 1547 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1548 1549 static const char errfmt[] = 1550 "\n%s: truncated route message, only %zu bytes left\n"; 1551 1552 static void 1553 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1554 { 1555 struct if_msghdr *ifm; 1556 struct ifa_msghdr *ifam; 1557 #ifdef RTM_NEWMADDR 1558 struct ifma_msghdr *ifmam; 1559 #endif 1560 struct if_announcemsghdr *ifan; 1561 const char *state; 1562 1563 if (verbose == 0) 1564 return; 1565 if (rtm->rtm_version != RTM_VERSION) { 1566 (void) printf("routing message version %d not understood\n", 1567 rtm->rtm_version); 1568 return; 1569 } 1570 if (rtm->rtm_type < sizeof(msgtypes) / sizeof(msgtypes[0])) 1571 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1572 else 1573 (void)printf("unknown type %d: ", rtm->rtm_type); 1574 (void)printf("len %d, ", rtm->rtm_msglen); 1575 1576 #define REQUIRE(x) do { \ 1577 if (msglen < sizeof(x)) \ 1578 goto badlen; \ 1579 else \ 1580 msglen -= sizeof(x); \ 1581 } while (0) 1582 1583 switch (rtm->rtm_type) { 1584 case RTM_IFINFO: 1585 REQUIRE(struct if_msghdr); 1586 ifm = (struct if_msghdr *)rtm; 1587 (void) printf("if# %d, ", ifm->ifm_index); 1588 switch (ifm->ifm_data.ifi_link_state) { 1589 case LINK_STATE_DOWN: 1590 state = "down"; 1591 break; 1592 case LINK_STATE_UP: 1593 state = "up"; 1594 break; 1595 default: 1596 state = "unknown"; 1597 break; 1598 } 1599 (void) printf("link: %s, flags:", state); 1600 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1601 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1602 break; 1603 case RTM_NEWADDR: 1604 case RTM_DELADDR: 1605 REQUIRE(struct ifa_msghdr); 1606 ifam = (struct ifa_msghdr *)rtm; 1607 (void) printf("metric %d, flags:", ifam->ifam_metric); 1608 bprintf(stdout, ifam->ifam_flags, routeflags); 1609 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1610 break; 1611 #ifdef RTM_NEWMADDR 1612 case RTM_NEWMADDR: 1613 case RTM_DELMADDR: 1614 REQUIRE(struct ifma_msghdr); 1615 ifmam = (struct ifma_msghdr *)rtm; 1616 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1617 break; 1618 #endif 1619 case RTM_IFANNOUNCE: 1620 REQUIRE(struct if_announcemsghdr); 1621 ifan = (struct if_announcemsghdr *)rtm; 1622 (void) printf("if# %d, what: ", ifan->ifan_index); 1623 switch (ifan->ifan_what) { 1624 case IFAN_ARRIVAL: 1625 printf("arrival"); 1626 break; 1627 case IFAN_DEPARTURE: 1628 printf("departure"); 1629 break; 1630 default: 1631 printf("#%d", ifan->ifan_what); 1632 break; 1633 } 1634 printf("\n"); 1635 break; 1636 1637 default: 1638 (void) printf("pid: %ld, seq %d, errno %d, flags:", 1639 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1640 bprintf(stdout, rtm->rtm_flags, routeflags); 1641 pmsg_common(rtm, msglen); 1642 } 1643 1644 return; 1645 1646 badlen: 1647 (void)printf(errfmt, __func__, msglen); 1648 #undef REQUIRE 1649 } 1650 1651 static void 1652 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1653 { 1654 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1655 struct sockaddr_dl *ifp = NULL; 1656 struct sockaddr *sa; 1657 char *cp; 1658 int i; 1659 1660 (void) printf(" route to: %s\n", 1661 routename((struct sockaddr *)&so_dst)); 1662 if (rtm->rtm_version != RTM_VERSION) { 1663 warnx("routing message version %d not understood", 1664 rtm->rtm_version); 1665 return; 1666 } 1667 if (rtm->rtm_msglen > msglen) { 1668 warnx("message length mismatch, in packet %d, returned %d", 1669 rtm->rtm_msglen, msglen); 1670 } 1671 if (rtm->rtm_errno) { 1672 errno = rtm->rtm_errno; 1673 warn("message indicates error %d", errno); 1674 return; 1675 } 1676 cp = ((char *)(rtm + 1)); 1677 if (rtm->rtm_addrs) 1678 for (i = 1; i; i <<= 1) 1679 if (i & rtm->rtm_addrs) { 1680 sa = (struct sockaddr *)cp; 1681 switch (i) { 1682 case RTA_DST: 1683 dst = sa; 1684 break; 1685 case RTA_GATEWAY: 1686 gate = sa; 1687 break; 1688 case RTA_NETMASK: 1689 mask = sa; 1690 break; 1691 case RTA_IFP: 1692 if (sa->sa_family == AF_LINK && 1693 ((struct sockaddr_dl *)sa)->sdl_nlen) 1694 ifp = (struct sockaddr_dl *)sa; 1695 break; 1696 } 1697 cp += SA_SIZE(sa); 1698 } 1699 if (dst && mask) 1700 mask->sa_family = dst->sa_family; /* XXX */ 1701 if (dst) 1702 (void)printf("destination: %s\n", routename(dst)); 1703 if (mask) { 1704 int savenflag = nflag; 1705 1706 nflag = 1; 1707 (void)printf(" mask: %s\n", routename(mask)); 1708 nflag = savenflag; 1709 } 1710 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1711 (void)printf(" gateway: %s\n", routename(gate)); 1712 if (fib >= 0) 1713 (void)printf(" fib: %u\n", (unsigned int)fib); 1714 if (ifp) 1715 (void)printf(" interface: %.*s\n", 1716 ifp->sdl_nlen, ifp->sdl_data); 1717 (void)printf(" flags: "); 1718 bprintf(stdout, rtm->rtm_flags, routeflags); 1719 1720 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1721 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1722 1723 (void) printf("\n%s\n", "\ 1724 recvpipe sendpipe ssthresh rtt,msec mtu weight expire"); 1725 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1726 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1727 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1728 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1729 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1730 printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1731 if (rtm->rtm_rmx.rmx_expire) 1732 rtm->rtm_rmx.rmx_expire -= time(0); 1733 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1734 #undef lock 1735 #undef msec 1736 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1737 if (verbose) 1738 pmsg_common(rtm, msglen); 1739 else if (rtm->rtm_addrs &~ RTA_IGN) { 1740 (void) printf("sockaddrs: "); 1741 bprintf(stdout, rtm->rtm_addrs, addrnames); 1742 putchar('\n'); 1743 } 1744 #undef RTA_IGN 1745 } 1746 1747 static void 1748 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1749 { 1750 (void) printf("\nlocks: "); 1751 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1752 (void) printf(" inits: "); 1753 bprintf(stdout, rtm->rtm_inits, metricnames); 1754 if (msglen > sizeof(struct rt_msghdr)) 1755 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1756 msglen - sizeof(struct rt_msghdr)); 1757 else 1758 (void) fflush(stdout); 1759 } 1760 1761 static void 1762 pmsg_addrs(char *cp, int addrs, size_t len) 1763 { 1764 struct sockaddr *sa; 1765 int i; 1766 1767 if (addrs == 0) { 1768 (void) putchar('\n'); 1769 return; 1770 } 1771 (void) printf("\nsockaddrs: "); 1772 bprintf(stdout, addrs, addrnames); 1773 (void) putchar('\n'); 1774 for (i = 1; i != 0; i <<= 1) 1775 if (i & addrs) { 1776 sa = (struct sockaddr *)cp; 1777 if (len == 0 || len < SA_SIZE(sa)) { 1778 (void) printf(errfmt, __func__, len); 1779 break; 1780 } 1781 (void) printf(" %s", routename(sa)); 1782 len -= SA_SIZE(sa); 1783 cp += SA_SIZE(sa); 1784 } 1785 (void) putchar('\n'); 1786 (void) fflush(stdout); 1787 } 1788 1789 static void 1790 bprintf(FILE *fp, int b, u_char *str) 1791 { 1792 int i; 1793 int gotsome = 0; 1794 1795 if (b == 0) 1796 return; 1797 while ((i = *str++) != 0) { 1798 if (b & (1 << (i-1))) { 1799 if (gotsome == 0) 1800 i = '<'; 1801 else 1802 i = ','; 1803 (void) putc(i, fp); 1804 gotsome = 1; 1805 for (; (i = *str) > 32; str++) 1806 (void) putc(i, fp); 1807 } else 1808 while (*str > 32) 1809 str++; 1810 } 1811 if (gotsome) 1812 (void) putc('>', fp); 1813 } 1814 1815 int 1816 keyword(const char *cp) 1817 { 1818 struct keytab *kt = keywords; 1819 1820 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1821 kt++; 1822 return (kt->kt_i); 1823 } 1824 1825 static void 1826 sodump(sup su, const char *which) 1827 { 1828 switch (su->sa.sa_family) { 1829 case AF_LINK: 1830 (void) printf("%s: link %s; ", 1831 which, link_ntoa(&su->sdl)); 1832 break; 1833 case AF_INET: 1834 (void) printf("%s: inet %s; ", 1835 which, inet_ntoa(su->sin.sin_addr)); 1836 break; 1837 case AF_APPLETALK: 1838 (void) printf("%s: atalk %s; ", 1839 which, atalk_ntoa(su->sat.sat_addr)); 1840 break; 1841 } 1842 (void) fflush(stdout); 1843 } 1844 1845 /* States*/ 1846 #define VIRGIN 0 1847 #define GOTONE 1 1848 #define GOTTWO 2 1849 /* Inputs */ 1850 #define DIGIT (4*0) 1851 #define END (4*1) 1852 #define DELIM (4*2) 1853 1854 static void 1855 sockaddr(char *addr, struct sockaddr *sa) 1856 { 1857 char *cp = (char *)sa; 1858 int size = sa->sa_len; 1859 char *cplim = cp + size; 1860 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1861 1862 memset(cp, 0, size); 1863 cp++; 1864 do { 1865 if ((*addr >= '0') && (*addr <= '9')) { 1866 new = *addr - '0'; 1867 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1868 new = *addr - 'a' + 10; 1869 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1870 new = *addr - 'A' + 10; 1871 } else if (*addr == '\0') 1872 state |= END; 1873 else 1874 state |= DELIM; 1875 addr++; 1876 switch (state /* | INPUT */) { 1877 case GOTTWO | DIGIT: 1878 *cp++ = byte; /*FALLTHROUGH*/ 1879 case VIRGIN | DIGIT: 1880 state = GOTONE; byte = new; continue; 1881 case GOTONE | DIGIT: 1882 state = GOTTWO; byte = new + (byte << 4); continue; 1883 default: /* | DELIM */ 1884 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1885 case GOTONE | END: 1886 case GOTTWO | END: 1887 *cp++ = byte; /* FALLTHROUGH */ 1888 case VIRGIN | END: 1889 break; 1890 } 1891 break; 1892 } while (cp < cplim); 1893 sa->sa_len = cp - (char *)sa; 1894 } 1895 1896 static int 1897 atalk_aton(const char *text, struct at_addr *addr) 1898 { 1899 u_int net, node; 1900 1901 if (sscanf(text, "%u.%u", &net, &node) != 2 1902 || net > 0xffff || node > 0xff) 1903 return(0); 1904 addr->s_net = htons(net); 1905 addr->s_node = node; 1906 return(1); 1907 } 1908 1909 static char * 1910 atalk_ntoa(struct at_addr at) 1911 { 1912 static char buf[20]; 1913 1914 (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1915 return(buf); 1916 } 1917