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 #ifndef FSTACK 44 __FBSDID("$FreeBSD$"); 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/file.h> 49 #include <sys/socket.h> 50 #include <sys/ioctl.h> 51 #include <sys/sysctl.h> 52 #include <sys/types.h> 53 #include <sys/queue.h> 54 55 #include <net/if.h> 56 #include <net/route.h> 57 #include <net/if_dl.h> 58 #include <netinet/in.h> 59 #include <netinet/if_ether.h> 60 #include <arpa/inet.h> 61 #include <netdb.h> 62 63 #include <ctype.h> 64 #include <err.h> 65 #include <errno.h> 66 #include <paths.h> 67 #include <stdbool.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <sysexits.h> 72 #include <time.h> 73 #include <unistd.h> 74 #include <ifaddrs.h> 75 76 #ifdef FSTACK 77 #include "rtioctl.h" 78 #include "compat.h" 79 #include "ff_ipc.h" 80 81 #define socket(a, b, c) rt_socket((a), (b), (c)) 82 #define shutdown(a, b) rt_shutdown((a), (b)) 83 #define setsockopt(a, b, c, d, e) rt_setsockopt((a), (b), (c), (d), (e)) 84 85 #define write(a, b, c) rtioctl((b), (c), (0)) 86 87 #endif 88 89 struct fibl { 90 TAILQ_ENTRY(fibl) fl_next; 91 92 int fl_num; 93 int fl_error; 94 int fl_errno; 95 }; 96 97 static struct keytab { 98 const char *kt_cp; 99 int kt_i; 100 } const keywords[] = { 101 #include "keywords.h" 102 {0, 0} 103 }; 104 105 static struct sockaddr_storage so[RTAX_MAX]; 106 static int pid, rtm_addrs; 107 static int s; 108 #ifndef FSTACK 109 static int nflag, af, qflag, tflag; 110 #else 111 static int nflag = 1; 112 static int af, qflag, tflag; 113 #endif 114 static int verbose, aflen; 115 static int locking, lockrest, debugonly; 116 static struct rt_metrics rt_metrics; 117 static u_long rtm_inits; 118 static uid_t uid; 119 static int defaultfib; 120 static int numfibs; 121 static char domain[MAXHOSTNAMELEN + 1]; 122 static bool domain_initialized; 123 static int rtm_seq; 124 static char rt_line[NI_MAXHOST]; 125 static char net_line[MAXHOSTNAMELEN + 1]; 126 127 static struct { 128 struct rt_msghdr m_rtm; 129 char m_space[512]; 130 } m_rtmsg; 131 132 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 133 134 static void printb(int, const char *); 135 static void flushroutes(int argc, char *argv[]); 136 static int flushroutes_fib(int); 137 static int getaddr(int, char *, struct hostent **, int); 138 static int keyword(const char *); 139 #ifdef INET 140 static void inet_makenetandmask(u_long, struct sockaddr_in *, 141 struct sockaddr_in *, u_long); 142 #endif 143 #ifdef INET6 144 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 145 #endif 146 #ifndef FSTACK 147 static void interfaces(void); 148 static void monitor(int, char*[]); 149 #endif 150 static const char *netname(struct sockaddr *); 151 static void newroute(int, char **); 152 static int newroute_fib(int, char *, int); 153 static void pmsg_addrs(char *, int, size_t); 154 static void pmsg_common(struct rt_msghdr *, size_t); 155 static int prefixlen(const char *); 156 static void print_getmsg(struct rt_msghdr *, int, int); 157 static void print_rtmsg(struct rt_msghdr *, size_t); 158 static const char *routename(struct sockaddr *); 159 static int rtmsg(int, int, int); 160 static void set_metric(char *, int); 161 static int set_sofib(int); 162 static void sockaddr(char *, struct sockaddr *, size_t); 163 static void sodump(struct sockaddr *, const char *); 164 static int fiboptlist_csv(const char *, struct fibl_head_t *); 165 static int fiboptlist_range(const char *, struct fibl_head_t *); 166 167 static void usage(const char *) __dead2; 168 169 static void 170 usage(const char *cp) 171 { 172 if (cp != NULL) 173 warnx("bad keyword: %s", cp); 174 #ifndef FSTACK 175 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 176 #else 177 errx(EX_USAGE, "usage: route -p <f-stack proc_id> [-46dnqtv] command [[modifiers] args]"); 178 #endif 179 /* NOTREACHED */ 180 } 181 182 int 183 main(int argc, char **argv) 184 { 185 int ch; 186 size_t len; 187 188 if (argc < 2) 189 usage(NULL); 190 191 #ifndef FSTACK 192 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 193 #else 194 ff_ipc_init(); 195 while ((ch = getopt(argc, argv, "46nqdtvp:")) != -1) 196 #endif 197 switch(ch) { 198 case '4': 199 #ifdef INET 200 af = AF_INET; 201 aflen = sizeof(struct sockaddr_in); 202 #else 203 errx(1, "IPv4 support is not compiled in"); 204 #endif 205 break; 206 case '6': 207 #ifdef INET6 208 af = AF_INET6; 209 aflen = sizeof(struct sockaddr_in6); 210 #else 211 errx(1, "IPv6 support is not compiled in"); 212 #endif 213 break; 214 case 'n': 215 nflag = 1; 216 break; 217 case 'q': 218 qflag = 1; 219 break; 220 case 'v': 221 verbose = 1; 222 break; 223 case 't': 224 tflag = 1; 225 break; 226 case 'd': 227 debugonly = 1; 228 break; 229 #ifdef FSTACK 230 case 'p': 231 ff_set_proc_id(atoi(optarg)); 232 break; 233 #endif 234 case '?': 235 default: 236 usage(NULL); 237 } 238 argc -= optind; 239 argv += optind; 240 241 pid = getpid(); 242 uid = geteuid(); 243 if (tflag) 244 s = open(_PATH_DEVNULL, O_WRONLY, 0); 245 else 246 s = socket(PF_ROUTE, SOCK_RAW, 0); 247 if (s < 0) 248 err(EX_OSERR, "socket"); 249 250 len = sizeof(numfibs); 251 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 252 numfibs = -1; 253 254 len = sizeof(defaultfib); 255 if (numfibs != -1 && 256 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 257 0) == -1) 258 defaultfib = -1; 259 260 if (*argv != NULL) 261 switch (keyword(*argv)) { 262 case K_GET: 263 case K_SHOW: 264 uid = 0; 265 /* FALLTHROUGH */ 266 267 case K_CHANGE: 268 case K_ADD: 269 case K_DEL: 270 case K_DELETE: 271 newroute(argc, argv); 272 /* NOTREACHED */ 273 274 case K_MONITOR: 275 #ifndef FSTACK 276 monitor(argc, argv); 277 #else 278 usage(*argv); 279 #endif 280 /* NOTREACHED */ 281 282 case K_FLUSH: 283 flushroutes(argc, argv); 284 #ifdef FSTACK 285 ff_ipc_exit(); 286 #endif 287 exit(0); 288 /* NOTREACHED */ 289 } 290 usage(*argv); 291 #ifdef FSTACK 292 ff_ipc_exit(); 293 #endif 294 /* NOTREACHED */ 295 } 296 297 static int 298 set_sofib(int fib) 299 { 300 301 if (fib < 0) 302 return (0); 303 #ifdef FSTACK 304 return (rt_setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 305 sizeof(fib))); 306 #endif 307 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 308 sizeof(fib))); 309 } 310 311 static int 312 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 313 { 314 struct fibl *fl; 315 char *str0, *str, *token, *endptr; 316 int fib[2], i, error; 317 318 str0 = str = strdup(arg); 319 error = 0; 320 i = 0; 321 while ((token = strsep(&str, "-")) != NULL) { 322 switch (i) { 323 case 0: 324 case 1: 325 errno = 0; 326 fib[i] = strtol(token, &endptr, 0); 327 if (errno == 0) { 328 if (*endptr != '\0' || 329 fib[i] < 0 || 330 (numfibs != -1 && fib[i] > numfibs - 1)) 331 errno = EINVAL; 332 } 333 if (errno) 334 error = 1; 335 break; 336 default: 337 error = 1; 338 } 339 if (error) 340 goto fiboptlist_range_ret; 341 i++; 342 } 343 if (fib[0] >= fib[1]) { 344 error = 1; 345 goto fiboptlist_range_ret; 346 } 347 for (i = fib[0]; i <= fib[1]; i++) { 348 fl = calloc(1, sizeof(*fl)); 349 if (fl == NULL) { 350 error = 1; 351 goto fiboptlist_range_ret; 352 } 353 fl->fl_num = i; 354 TAILQ_INSERT_TAIL(flh, fl, fl_next); 355 } 356 fiboptlist_range_ret: 357 free(str0); 358 return (error); 359 } 360 361 #define ALLSTRLEN 64 362 static int 363 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 364 { 365 struct fibl *fl; 366 char *str0, *str, *token, *endptr; 367 int fib, error; 368 369 str0 = str = NULL; 370 if (strcmp("all", arg) == 0) { 371 str = calloc(1, ALLSTRLEN); 372 if (str == NULL) { 373 error = 1; 374 goto fiboptlist_csv_ret; 375 } 376 if (numfibs > 1) 377 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 378 else 379 snprintf(str, ALLSTRLEN - 1, "%d", 0); 380 } else if (strcmp("default", arg) == 0) { 381 str0 = str = calloc(1, ALLSTRLEN); 382 if (str == NULL) { 383 error = 1; 384 goto fiboptlist_csv_ret; 385 } 386 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 387 } else 388 str0 = str = strdup(arg); 389 390 error = 0; 391 while ((token = strsep(&str, ",")) != NULL) { 392 if (*token != '-' && strchr(token, '-') != NULL) { 393 error = fiboptlist_range(token, flh); 394 if (error) 395 goto fiboptlist_csv_ret; 396 } else { 397 errno = 0; 398 fib = strtol(token, &endptr, 0); 399 if (errno == 0) { 400 if (*endptr != '\0' || 401 fib < 0 || 402 (numfibs != -1 && fib > numfibs - 1)) 403 errno = EINVAL; 404 } 405 if (errno) { 406 error = 1; 407 goto fiboptlist_csv_ret; 408 } 409 fl = calloc(1, sizeof(*fl)); 410 if (fl == NULL) { 411 error = 1; 412 goto fiboptlist_csv_ret; 413 } 414 fl->fl_num = fib; 415 TAILQ_INSERT_TAIL(flh, fl, fl_next); 416 } 417 } 418 fiboptlist_csv_ret: 419 if (str0 != NULL) 420 free(str0); 421 return (error); 422 } 423 424 /* 425 * Purge all entries in the routing tables not 426 * associated with network interfaces. 427 */ 428 static void 429 flushroutes(int argc, char *argv[]) 430 { 431 struct fibl *fl; 432 int error; 433 434 if (uid != 0 && !debugonly && !tflag) 435 errx(EX_NOPERM, "must be root to alter routing table"); 436 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 437 438 TAILQ_INIT(&fibl_head); 439 while (argc > 1) { 440 argc--; 441 argv++; 442 if (**argv != '-') 443 usage(*argv); 444 switch (keyword(*argv + 1)) { 445 #ifdef INET 446 case K_4: 447 case K_INET: 448 af = AF_INET; 449 break; 450 #endif 451 #ifdef INET6 452 case K_6: 453 case K_INET6: 454 af = AF_INET6; 455 break; 456 #endif 457 case K_LINK: 458 af = AF_LINK; 459 break; 460 case K_FIB: 461 if (!--argc) 462 usage(*argv); 463 error = fiboptlist_csv(*++argv, &fibl_head); 464 if (error) 465 errx(EX_USAGE, "invalid fib number: %s", *argv); 466 break; 467 default: 468 usage(*argv); 469 } 470 } 471 if (TAILQ_EMPTY(&fibl_head)) { 472 error = fiboptlist_csv("default", &fibl_head); 473 if (error) 474 errx(EX_OSERR, "fiboptlist_csv failed."); 475 } 476 TAILQ_FOREACH(fl, &fibl_head, fl_next) 477 flushroutes_fib(fl->fl_num); 478 } 479 480 static int 481 flushroutes_fib(int fib) 482 { 483 struct rt_msghdr *rtm; 484 size_t needed; 485 char *buf, *next, *lim; 486 int mib[7], rlen, seqno, count = 0; 487 int error; 488 489 error = set_sofib(fib); 490 if (error) { 491 warn("fib number %d is ignored", fib); 492 return (error); 493 } 494 495 retry: 496 mib[0] = CTL_NET; 497 mib[1] = PF_ROUTE; 498 mib[2] = 0; /* protocol */ 499 mib[3] = AF_UNSPEC; 500 mib[4] = NET_RT_DUMP; 501 mib[5] = 0; /* no flags */ 502 mib[6] = fib; 503 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 504 err(EX_OSERR, "route-sysctl-estimate"); 505 if ((buf = malloc(needed)) == NULL) 506 errx(EX_OSERR, "malloc failed"); 507 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 508 if (errno == ENOMEM && count++ < 10) { 509 warnx("Routing table grew, retrying"); 510 sleep(1); 511 free(buf); 512 goto retry; 513 } 514 err(EX_OSERR, "route-sysctl-get"); 515 } 516 lim = buf + needed; 517 if (verbose) 518 (void)printf("Examining routing table from sysctl\n"); 519 seqno = 0; /* ??? */ 520 for (next = buf; next < lim; next += rtm->rtm_msglen) { 521 rtm = (struct rt_msghdr *)(void *)next; 522 if (verbose) 523 print_rtmsg(rtm, rtm->rtm_msglen); 524 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 525 continue; 526 if (af != 0) { 527 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 528 529 if (sa->sa_family != af) 530 continue; 531 } 532 if (debugonly) 533 continue; 534 rtm->rtm_type = RTM_DELETE; 535 rtm->rtm_seq = seqno; 536 rlen = write(s, next, rtm->rtm_msglen); 537 if (rlen < 0 && errno == EPERM) 538 err(1, "write to routing socket"); 539 if (rlen < (int)rtm->rtm_msglen) { 540 warn("write to routing socket"); 541 (void)printf("got only %d for rlen\n", rlen); 542 free(buf); 543 goto retry; 544 break; 545 } 546 seqno++; 547 if (qflag) 548 continue; 549 if (verbose) 550 print_rtmsg(rtm, rlen); 551 else { 552 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 553 554 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 555 routename(sa) : netname(sa)); 556 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 557 printf("%-20.20s ", routename(sa)); 558 if (fib >= 0) 559 printf("-fib %-3d ", fib); 560 printf("done\n"); 561 } 562 } 563 return (error); 564 } 565 566 static const char * 567 routename(struct sockaddr *sa) 568 { 569 struct sockaddr_dl *sdl; 570 const char *cp; 571 int n; 572 573 if (!domain_initialized) { 574 domain_initialized = true; 575 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 576 (cp = strchr(domain, '.'))) { 577 domain[MAXHOSTNAMELEN] = '\0'; 578 (void)strcpy(domain, cp + 1); 579 } else 580 domain[0] = '\0'; 581 } 582 583 /* If the address is zero-filled, use "default". */ 584 if (sa->sa_len == 0 && nflag == 0) 585 return ("default"); 586 #if defined(INET) || defined(INET6) 587 switch (sa->sa_family) { 588 #ifdef INET 589 case AF_INET: 590 /* If the address is zero-filled, use "default". */ 591 if (nflag == 0 && 592 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 593 INADDR_ANY) 594 return("default"); 595 break; 596 #endif 597 #ifdef INET6 598 case AF_INET6: 599 /* If the address is zero-filled, use "default". */ 600 if (nflag == 0 && 601 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 602 return("default"); 603 break; 604 #endif 605 } 606 #endif 607 608 switch (sa->sa_family) { 609 #if defined(INET) || defined(INET6) 610 #ifdef INET 611 case AF_INET: 612 #endif 613 #ifdef INET6 614 case AF_INET6: 615 #endif 616 { 617 struct sockaddr_storage ss; 618 int error; 619 char *p; 620 621 memset(&ss, 0, sizeof(ss)); 622 if (sa->sa_len == 0) 623 ss.ss_family = sa->sa_family; 624 else 625 memcpy(&ss, sa, sa->sa_len); 626 /* Expand sa->sa_len because it could be shortened. */ 627 if (sa->sa_family == AF_INET) 628 ss.ss_len = sizeof(struct sockaddr_in); 629 else if (sa->sa_family == AF_INET6) 630 ss.ss_len = sizeof(struct sockaddr_in6); 631 #ifndef FSTACK 632 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 633 rt_line, sizeof(rt_line), NULL, 0, 634 (nflag == 0) ? 0 : NI_NUMERICHOST); 635 #else 636 const char *dst = NULL; 637 error = 0; 638 struct sockaddr_in *sin = (struct sockaddr_in *)&ss; 639 #ifdef INET6 640 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ss; 641 if (sa->sa_family == AF_INET6) 642 dst = inet_ntop(AF_INET6_LINUX, &sin6->sin6_addr, rt_line, sizeof(rt_line)); 643 else 644 #endif 645 dst = inet_ntop(AF_INET, &sin->sin_addr, rt_line, sizeof(rt_line)); 646 if (dst == NULL) { 647 error = EAI_NONAME; 648 } 649 #endif 650 if (error) { 651 warnx("getnameinfo(): %s", gai_strerror(error)); 652 strncpy(rt_line, "invalid", sizeof(rt_line)); 653 } 654 655 /* Remove the domain part if any. */ 656 p = strchr(rt_line, '.'); 657 if (p != NULL && strcmp(p + 1, domain) == 0) 658 *p = '\0'; 659 660 return (rt_line); 661 break; 662 } 663 #endif 664 case AF_LINK: 665 sdl = (struct sockaddr_dl *)(void *)sa; 666 667 if (sdl->sdl_nlen == 0 && 668 sdl->sdl_alen == 0 && 669 sdl->sdl_slen == 0) { 670 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 671 sdl->sdl_index); 672 if (n > (int)sizeof(rt_line)) 673 rt_line[0] = '\0'; 674 return (rt_line); 675 } else 676 return (link_ntoa(sdl)); 677 break; 678 679 default: 680 { 681 u_short *sp = (u_short *)(void *)sa; 682 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 683 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 684 char *cpe = rt_line + sizeof(rt_line); 685 686 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 687 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 688 cps += n; 689 else 690 *cps = '\0'; 691 break; 692 } 693 } 694 return (rt_line); 695 } 696 697 /* 698 * Return the name of the network whose address is given. 699 * The address is assumed to be that of a net, not a host. 700 */ 701 static const char * 702 netname(struct sockaddr *sa) 703 { 704 struct sockaddr_dl *sdl; 705 int n; 706 #ifdef INET 707 #ifndef FSTACK 708 struct netent *np = NULL; 709 const char *cp = NULL; 710 u_long i; 711 #else 712 const char *cp = NULL; 713 #endif 714 #endif 715 716 switch (sa->sa_family) { 717 #ifdef INET 718 case AF_INET: 719 { 720 struct in_addr in; 721 722 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 723 #ifndef FSTACK 724 i = in.s_addr = ntohl(in.s_addr); 725 #else 726 in.s_addr = ntohl(in.s_addr); 727 #endif 728 if (in.s_addr == 0) 729 cp = "default"; 730 #ifndef FSTACK 731 else if (!nflag) { 732 np = getnetbyaddr(i, AF_INET); 733 if (np != NULL) 734 cp = np->n_name; 735 } 736 #endif 737 738 #define C(x) (unsigned)((x) & 0xff) 739 if (cp != NULL) 740 strncpy(net_line, cp, sizeof(net_line)); 741 else if ((in.s_addr & 0xffffff) == 0) 742 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 743 else if ((in.s_addr & 0xffff) == 0) 744 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 745 C(in.s_addr >> 16)); 746 else if ((in.s_addr & 0xff) == 0) 747 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 748 C(in.s_addr >> 16), C(in.s_addr >> 8)); 749 else 750 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 751 C(in.s_addr >> 16), C(in.s_addr >> 8), 752 C(in.s_addr)); 753 754 #undef C 755 break; 756 } 757 #endif 758 #ifdef INET6 759 case AF_INET6: 760 { 761 struct sockaddr_in6 sin6; 762 int niflags = 0; 763 764 memset(&sin6, 0, sizeof(sin6)); 765 memcpy(&sin6, sa, sa->sa_len); 766 sin6.sin6_len = sizeof(sin6); 767 sin6.sin6_family = AF_INET6; 768 #ifndef FSTACK 769 if (nflag) 770 niflags |= NI_NUMERICHOST; 771 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 772 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 773 #else 774 if (inet_ntop(AF_INET6_LINUX, &sin6.sin6_addr, net_line, sizeof(net_line)) == NULL) 775 776 #endif 777 strncpy(net_line, "invalid", sizeof(net_line)); 778 779 return(net_line); 780 } 781 #endif 782 case AF_LINK: 783 sdl = (struct sockaddr_dl *)(void *)sa; 784 785 if (sdl->sdl_nlen == 0 && 786 sdl->sdl_alen == 0 && 787 sdl->sdl_slen == 0) { 788 n = snprintf(net_line, sizeof(net_line), "link#%d", 789 sdl->sdl_index); 790 if (n > (int)sizeof(net_line)) 791 net_line[0] = '\0'; 792 return (net_line); 793 } else 794 return (link_ntoa(sdl)); 795 break; 796 797 default: 798 { 799 u_short *sp = (u_short *)(void *)sa->sa_data; 800 u_short *splim = sp + ((sa->sa_len + 1)>>1); 801 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 802 char *cpe = net_line + sizeof(net_line); 803 804 while (sp < splim && cps < cpe) 805 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 806 cps += n; 807 else 808 *cps = '\0'; 809 break; 810 } 811 } 812 return (net_line); 813 } 814 815 static void 816 set_metric(char *value, int key) 817 { 818 int flag = 0; 819 char *endptr; 820 u_long noval, *valp = &noval; 821 822 switch (key) { 823 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 824 caseof(K_MTU, RTV_MTU, rmx_mtu); 825 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 826 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 827 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 828 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 829 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 830 caseof(K_RTT, RTV_RTT, rmx_rtt); 831 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 832 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 833 } 834 rtm_inits |= flag; 835 if (lockrest || locking) 836 rt_metrics.rmx_locks |= flag; 837 if (locking) 838 locking = 0; 839 errno = 0; 840 *valp = strtol(value, &endptr, 0); 841 if (errno == 0 && *endptr != '\0') 842 errno = EINVAL; 843 if (errno) 844 err(EX_USAGE, "%s", value); 845 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 846 struct timespec ts; 847 848 clock_gettime(CLOCK_REALTIME_FAST, &ts); 849 *valp += ts.tv_sec; 850 } 851 } 852 853 #define F_ISHOST 0x01 854 #define F_FORCENET 0x02 855 #define F_FORCEHOST 0x04 856 #define F_PROXY 0x08 857 #define F_INTERFACE 0x10 858 859 static void 860 newroute(int argc, char **argv) 861 { 862 struct hostent *hp; 863 struct fibl *fl; 864 char *cmd; 865 const char *dest, *gateway, *errmsg; 866 int key, error, flags, nrflags, fibnum; 867 868 if (uid != 0 && !debugonly && !tflag) 869 errx(EX_NOPERM, "must be root to alter routing table"); 870 dest = NULL; 871 gateway = NULL; 872 flags = RTF_STATIC; 873 nrflags = 0; 874 hp = NULL; 875 TAILQ_INIT(&fibl_head); 876 877 cmd = argv[0]; 878 if (*cmd != 'g' && *cmd != 's') 879 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 880 while (--argc > 0) { 881 if (**(++argv)== '-') { 882 switch (key = keyword(1 + *argv)) { 883 case K_LINK: 884 af = AF_LINK; 885 aflen = sizeof(struct sockaddr_dl); 886 break; 887 #ifdef INET 888 case K_4: 889 case K_INET: 890 af = AF_INET; 891 aflen = sizeof(struct sockaddr_in); 892 break; 893 #endif 894 #ifdef INET6 895 case K_6: 896 case K_INET6: 897 af = AF_INET6; 898 aflen = sizeof(struct sockaddr_in6); 899 break; 900 #endif 901 case K_SA: 902 af = PF_ROUTE; 903 aflen = sizeof(struct sockaddr_storage); 904 break; 905 case K_IFACE: 906 case K_INTERFACE: 907 nrflags |= F_INTERFACE; 908 break; 909 case K_NOSTATIC: 910 flags &= ~RTF_STATIC; 911 break; 912 case K_LOCK: 913 locking = 1; 914 break; 915 case K_LOCKREST: 916 lockrest = 1; 917 break; 918 case K_HOST: 919 nrflags |= F_FORCEHOST; 920 break; 921 case K_REJECT: 922 flags |= RTF_REJECT; 923 break; 924 case K_BLACKHOLE: 925 flags |= RTF_BLACKHOLE; 926 break; 927 case K_PROTO1: 928 flags |= RTF_PROTO1; 929 break; 930 case K_PROTO2: 931 flags |= RTF_PROTO2; 932 break; 933 case K_PROXY: 934 nrflags |= F_PROXY; 935 break; 936 case K_XRESOLVE: 937 flags |= RTF_XRESOLVE; 938 break; 939 case K_STATIC: 940 flags |= RTF_STATIC; 941 break; 942 case K_STICKY: 943 flags |= RTF_STICKY; 944 break; 945 case K_NOSTICK: 946 flags &= ~RTF_STICKY; 947 break; 948 case K_FIB: 949 if (!--argc) 950 usage(NULL); 951 error = fiboptlist_csv(*++argv, &fibl_head); 952 if (error) 953 errx(EX_USAGE, 954 "invalid fib number: %s", *argv); 955 break; 956 case K_IFA: 957 if (!--argc) 958 usage(NULL); 959 getaddr(RTAX_IFA, *++argv, 0, nrflags); 960 break; 961 case K_IFP: 962 if (!--argc) 963 usage(NULL); 964 getaddr(RTAX_IFP, *++argv, 0, nrflags); 965 break; 966 case K_GENMASK: 967 if (!--argc) 968 usage(NULL); 969 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 970 break; 971 case K_GATEWAY: 972 if (!--argc) 973 usage(NULL); 974 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 975 gateway = *argv; 976 break; 977 case K_DST: 978 if (!--argc) 979 usage(NULL); 980 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 981 nrflags |= F_ISHOST; 982 dest = *argv; 983 break; 984 case K_NETMASK: 985 if (!--argc) 986 usage(NULL); 987 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 988 /* FALLTHROUGH */ 989 case K_NET: 990 nrflags |= F_FORCENET; 991 break; 992 case K_PREFIXLEN: 993 if (!--argc) 994 usage(NULL); 995 if (prefixlen(*++argv) == -1) { 996 nrflags &= ~F_FORCENET; 997 nrflags |= F_ISHOST; 998 } else { 999 nrflags |= F_FORCENET; 1000 nrflags &= ~F_ISHOST; 1001 } 1002 break; 1003 case K_MTU: 1004 case K_HOPCOUNT: 1005 case K_EXPIRE: 1006 case K_RECVPIPE: 1007 case K_SENDPIPE: 1008 case K_SSTHRESH: 1009 case K_RTT: 1010 case K_RTTVAR: 1011 case K_WEIGHT: 1012 if (!--argc) 1013 usage(NULL); 1014 set_metric(*++argv, key); 1015 break; 1016 default: 1017 usage(1+*argv); 1018 } 1019 } else { 1020 if ((rtm_addrs & RTA_DST) == 0) { 1021 dest = *argv; 1022 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 1023 nrflags |= F_ISHOST; 1024 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 1025 gateway = *argv; 1026 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 1027 } else { 1028 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 1029 nrflags |= F_FORCENET; 1030 } 1031 } 1032 } 1033 1034 /* Do some sanity checks on resulting request */ 1035 if (so[RTAX_DST].ss_len == 0) { 1036 warnx("destination parameter required"); 1037 usage(NULL); 1038 } 1039 1040 if (so[RTAX_NETMASK].ss_len != 0 && 1041 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 1042 warnx("destination and netmask family need to be the same"); 1043 usage(NULL); 1044 } 1045 1046 if (nrflags & F_FORCEHOST) { 1047 nrflags |= F_ISHOST; 1048 #ifdef INET6 1049 if (af == AF_INET6) { 1050 rtm_addrs &= ~RTA_NETMASK; 1051 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 1052 } 1053 #endif 1054 } 1055 if (nrflags & F_FORCENET) 1056 nrflags &= ~F_ISHOST; 1057 flags |= RTF_UP; 1058 if (nrflags & F_ISHOST) 1059 flags |= RTF_HOST; 1060 if ((nrflags & F_INTERFACE) == 0) 1061 flags |= RTF_GATEWAY; 1062 if (nrflags & F_PROXY) 1063 flags |= RTF_ANNOUNCE; 1064 if (dest == NULL) 1065 dest = ""; 1066 if (gateway == NULL) 1067 gateway = ""; 1068 1069 if (TAILQ_EMPTY(&fibl_head)) { 1070 error = fiboptlist_csv("default", &fibl_head); 1071 if (error) 1072 errx(EX_OSERR, "fiboptlist_csv failed."); 1073 } 1074 error = 0; 1075 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1076 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1077 if (fl->fl_error) 1078 fl->fl_errno = errno; 1079 error += fl->fl_error; 1080 } 1081 if (*cmd == 'g' || *cmd == 's'){ 1082 #ifdef FSTACK 1083 ff_ipc_exit(); 1084 #endif 1085 exit(error); 1086 } 1087 1088 error = 0; 1089 if (!qflag) { 1090 fibnum = 0; 1091 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1092 if (fl->fl_error == 0) 1093 fibnum++; 1094 } 1095 if (fibnum > 0) { 1096 int firstfib = 1; 1097 1098 printf("%s %s %s", cmd, 1099 (nrflags & F_ISHOST) ? "host" : "net", dest); 1100 if (*gateway) 1101 printf(": gateway %s", gateway); 1102 1103 if (numfibs > 1) { 1104 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1105 if (fl->fl_error == 0 1106 && fl->fl_num >= 0) { 1107 if (firstfib) { 1108 printf(" fib "); 1109 firstfib = 0; 1110 } 1111 printf("%d", fl->fl_num); 1112 if (fibnum-- > 1) 1113 printf(","); 1114 } 1115 } 1116 } 1117 printf("\n"); 1118 } 1119 1120 fibnum = 0; 1121 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1122 if (fl->fl_error != 0) { 1123 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1124 ? "host" : "net", dest); 1125 if (*gateway) 1126 printf(": gateway %s", gateway); 1127 1128 if (fl->fl_num >= 0) 1129 printf(" fib %d", fl->fl_num); 1130 1131 switch (fl->fl_errno) { 1132 case ESRCH: 1133 errmsg = "not in table"; 1134 break; 1135 case EBUSY: 1136 errmsg = "entry in use"; 1137 break; 1138 case ENOBUFS: 1139 errmsg = "not enough memory"; 1140 break; 1141 case EADDRINUSE: 1142 /* 1143 * handle recursion avoidance 1144 * in rt_setgate() 1145 */ 1146 errmsg = "gateway uses the same route"; 1147 break; 1148 case EEXIST: 1149 errmsg = "route already in table"; 1150 break; 1151 default: 1152 errmsg = strerror(fl->fl_errno); 1153 break; 1154 } 1155 printf(": %s\n", errmsg); 1156 error = 1; 1157 } 1158 } 1159 } 1160 #ifdef FSTACK 1161 ff_ipc_exit(); 1162 #endif 1163 exit(error); 1164 } 1165 1166 static int 1167 newroute_fib(int fib, char *cmd, int flags) 1168 { 1169 int error; 1170 1171 error = set_sofib(fib); 1172 if (error) { 1173 warn("fib number %d is ignored", fib); 1174 return (error); 1175 } 1176 1177 error = rtmsg(*cmd, flags, fib); 1178 return (error); 1179 } 1180 1181 #ifdef INET 1182 static void 1183 inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1184 struct sockaddr_in *sin_mask, u_long bits) 1185 { 1186 u_long mask = 0; 1187 1188 rtm_addrs |= RTA_NETMASK; 1189 1190 /* 1191 * MSB of net should be meaningful. 0/0 is exception. 1192 */ 1193 if (net > 0) 1194 while ((net & 0xff000000) == 0) 1195 net <<= 8; 1196 1197 /* 1198 * If no /xx was specified we must calculate the 1199 * CIDR address. 1200 */ 1201 if ((bits == 0) && (net != 0)) { 1202 u_long i, j; 1203 1204 for(i = 0, j = 0xff; i < 4; i++) { 1205 if (net & j) { 1206 break; 1207 } 1208 j <<= 8; 1209 } 1210 /* i holds the first non zero bit */ 1211 bits = 32 - (i*8); 1212 } 1213 if (bits != 0) 1214 mask = 0xffffffff << (32 - bits); 1215 1216 sin->sin_addr.s_addr = htonl(net); 1217 sin_mask->sin_addr.s_addr = htonl(mask); 1218 sin_mask->sin_len = sizeof(struct sockaddr_in); 1219 sin_mask->sin_family = AF_INET; 1220 } 1221 #endif 1222 1223 #ifdef INET6 1224 /* 1225 * XXX the function may need more improvement... 1226 */ 1227 static int 1228 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1229 { 1230 1231 if (plen == NULL) { 1232 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1233 sin6->sin6_scope_id == 0) 1234 plen = "0"; 1235 } 1236 1237 if (plen == NULL || strcmp(plen, "128") == 0) 1238 return (1); 1239 rtm_addrs |= RTA_NETMASK; 1240 prefixlen(plen); 1241 return (0); 1242 } 1243 #endif 1244 1245 /* 1246 * Interpret an argument as a network address of some kind, 1247 * returning 1 if a host address, 0 if a network address. 1248 */ 1249 static int 1250 getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1251 { 1252 struct sockaddr *sa; 1253 #if defined(INET) 1254 struct sockaddr_in *sin; 1255 struct hostent *hp; 1256 #ifndef FSTACK 1257 struct netent *np; 1258 #endif 1259 u_long val; 1260 char *q; 1261 #elif defined(INET6) 1262 char *q; 1263 #endif 1264 1265 if (idx < 0 || idx >= RTAX_MAX) 1266 usage("internal error"); 1267 if (af == 0) { 1268 #if defined(INET) 1269 af = AF_INET; 1270 aflen = sizeof(struct sockaddr_in); 1271 #elif defined(INET6) 1272 af = AF_INET6; 1273 aflen = sizeof(struct sockaddr_in6); 1274 #else 1275 af = AF_LINK; 1276 aflen = sizeof(struct sockaddr_dl); 1277 #endif 1278 } 1279 #ifndef INET 1280 hpp = NULL; 1281 #endif 1282 rtm_addrs |= (1 << idx); 1283 sa = (struct sockaddr *)&so[idx]; 1284 sa->sa_family = af; 1285 sa->sa_len = aflen; 1286 1287 switch (idx) { 1288 case RTAX_GATEWAY: 1289 if (nrflags & F_INTERFACE) { 1290 struct ifaddrs *ifap, *ifa; 1291 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1292 struct sockaddr_dl *sdl = NULL; 1293 1294 if (getifaddrs(&ifap)) 1295 err(EX_OSERR, "getifaddrs"); 1296 1297 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1298 if (ifa->ifa_addr->sa_family != AF_LINK) 1299 continue; 1300 1301 if (strcmp(str, ifa->ifa_name) != 0) 1302 continue; 1303 1304 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1305 } 1306 /* If we found it, then use it */ 1307 if (sdl != NULL) { 1308 /* 1309 * Note that we need to copy before calling 1310 * freeifaddrs(). 1311 */ 1312 memcpy(sdl0, sdl, sdl->sdl_len); 1313 } 1314 freeifaddrs(ifap); 1315 if (sdl != NULL) 1316 return(1); 1317 else 1318 errx(EX_DATAERR, 1319 "interface '%s' does not exist", str); 1320 } 1321 break; 1322 case RTAX_IFP: 1323 sa->sa_family = AF_LINK; 1324 break; 1325 } 1326 if (strcmp(str, "default") == 0) { 1327 /* 1328 * Default is net 0.0.0.0/0 1329 */ 1330 switch (idx) { 1331 case RTAX_DST: 1332 nrflags |= F_FORCENET; 1333 getaddr(RTAX_NETMASK, str, 0, nrflags); 1334 break; 1335 } 1336 return (0); 1337 } 1338 switch (sa->sa_family) { 1339 #ifdef INET6 1340 case AF_INET6: 1341 { 1342 #ifndef FSTACK 1343 struct addrinfo hints, *res; 1344 int ecode; 1345 #endif 1346 1347 q = NULL; 1348 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1349 *q = '\0'; 1350 #ifndef FSTACK 1351 memset(&hints, 0, sizeof(hints)); 1352 hints.ai_family = sa->sa_family; 1353 hints.ai_socktype = SOCK_DGRAM; 1354 ecode = getaddrinfo(str, NULL, &hints, &res); 1355 if (ecode != 0 || res->ai_family != AF_INET6 || 1356 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1357 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1358 memcpy(sa, res->ai_addr, res->ai_addrlen); 1359 freeaddrinfo(res); 1360 #else 1361 if (inet_pton(AF_INET6_LINUX, str, &((struct sockaddr_in6 *)sa)->sin6_addr) == -1) 1362 errx(EX_OSERR, "%s: %d, %s", str, errno, strerror(errno)); 1363 #endif 1364 if (q != NULL) 1365 *q++ = '/'; 1366 if (idx == RTAX_DST) 1367 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1368 return (0); 1369 } 1370 #endif /* INET6 */ 1371 case AF_LINK: 1372 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1373 return (1); 1374 1375 case PF_ROUTE: 1376 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1377 return (1); 1378 #ifdef INET 1379 case AF_INET: 1380 #endif 1381 default: 1382 break; 1383 } 1384 1385 #ifdef INET 1386 sin = (struct sockaddr_in *)(void *)sa; 1387 if (hpp == NULL) 1388 hpp = &hp; 1389 *hpp = NULL; 1390 1391 q = strchr(str,'/'); 1392 if (q != NULL && idx == RTAX_DST) { 1393 *q = '\0'; 1394 if ((val = inet_network(str)) != INADDR_NONE) { 1395 inet_makenetandmask(val, sin, 1396 (struct sockaddr_in *)&so[RTAX_NETMASK], 1397 strtoul(q+1, 0, 0)); 1398 return (0); 1399 } 1400 *q = '/'; 1401 } 1402 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1403 inet_aton(str, &sin->sin_addr)) { 1404 val = sin->sin_addr.s_addr; 1405 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1406 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1407 return (1); 1408 else { 1409 val = ntohl(val); 1410 goto netdone; 1411 } 1412 } 1413 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1414 ((val = inet_network(str)) != INADDR_NONE 1415 #ifndef FSTACK 1416 || ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0) 1417 #endif 1418 )){ 1419 1420 netdone: 1421 inet_makenetandmask(val, sin, 1422 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1423 return (0); 1424 } 1425 1426 #ifndef FSTACK 1427 hp = gethostbyname(str); 1428 if (hp != NULL) { 1429 *hpp = hp; 1430 sin->sin_family = hp->h_addrtype; 1431 memmove((char *)&sin->sin_addr, hp->h_addr, 1432 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1433 return (1); 1434 } 1435 #endif 1436 #endif 1437 errx(EX_NOHOST, "bad address: %s", str); 1438 } 1439 1440 static int 1441 prefixlen(const char *str) 1442 { 1443 int len = atoi(str), q, r; 1444 int max; 1445 char *p; 1446 1447 rtm_addrs |= RTA_NETMASK; 1448 switch (af) { 1449 #ifdef INET6 1450 case AF_INET6: 1451 { 1452 struct sockaddr_in6 *sin6 = 1453 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1454 1455 max = 128; 1456 p = (char *)&sin6->sin6_addr; 1457 sin6->sin6_family = AF_INET6; 1458 sin6->sin6_len = sizeof(*sin6); 1459 break; 1460 } 1461 #endif 1462 #ifdef INET 1463 case AF_INET: 1464 { 1465 struct sockaddr_in *sin = 1466 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1467 1468 max = 32; 1469 p = (char *)&sin->sin_addr; 1470 sin->sin_family = AF_INET; 1471 sin->sin_len = sizeof(*sin); 1472 break; 1473 } 1474 #endif 1475 default: 1476 errx(EX_OSERR, "prefixlen not supported in this af"); 1477 } 1478 1479 if (len < 0 || max < len) 1480 errx(EX_USAGE, "%s: invalid prefixlen", str); 1481 1482 q = len >> 3; 1483 r = len & 7; 1484 memset((void *)p, 0, max / 8); 1485 if (q > 0) 1486 memset((void *)p, 0xff, q); 1487 if (r > 0) 1488 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1489 if (len == max) 1490 return (-1); 1491 else 1492 return (len); 1493 } 1494 1495 #ifndef FSTACK 1496 static void 1497 interfaces(void) 1498 { 1499 size_t needed; 1500 int mib[6]; 1501 char *buf, *lim, *next, count = 0; 1502 struct rt_msghdr *rtm; 1503 1504 retry2: 1505 mib[0] = CTL_NET; 1506 mib[1] = PF_ROUTE; 1507 mib[2] = 0; /* protocol */ 1508 mib[3] = AF_UNSPEC; 1509 mib[4] = NET_RT_IFLIST; 1510 mib[5] = 0; /* no flags */ 1511 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1512 err(EX_OSERR, "route-sysctl-estimate"); 1513 if ((buf = malloc(needed)) == NULL) 1514 errx(EX_OSERR, "malloc failed"); 1515 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1516 if (errno == ENOMEM && count++ < 10) { 1517 warnx("Routing table grew, retrying"); 1518 sleep(1); 1519 free(buf); 1520 goto retry2; 1521 } 1522 err(EX_OSERR, "actual retrieval of interface table"); 1523 } 1524 lim = buf + needed; 1525 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1526 rtm = (struct rt_msghdr *)(void *)next; 1527 print_rtmsg(rtm, rtm->rtm_msglen); 1528 } 1529 } 1530 1531 static void 1532 monitor(int argc, char *argv[]) 1533 { 1534 int n, fib, error; 1535 char msg[2048], *endptr; 1536 1537 fib = defaultfib; 1538 while (argc > 1) { 1539 argc--; 1540 argv++; 1541 if (**argv != '-') 1542 usage(*argv); 1543 switch (keyword(*argv + 1)) { 1544 case K_FIB: 1545 if (!--argc) 1546 usage(*argv); 1547 errno = 0; 1548 fib = strtol(*++argv, &endptr, 0); 1549 if (errno == 0) { 1550 if (*endptr != '\0' || 1551 fib < 0 || 1552 (numfibs != -1 && fib > numfibs - 1)) 1553 errno = EINVAL; 1554 } 1555 if (errno) 1556 errx(EX_USAGE, "invalid fib number: %s", *argv); 1557 break; 1558 default: 1559 usage(*argv); 1560 } 1561 } 1562 error = set_sofib(fib); 1563 if (error) 1564 errx(EX_USAGE, "invalid fib number: %d", fib); 1565 1566 verbose = 1; 1567 if (debugonly) { 1568 interfaces(); 1569 #ifdef FSTACK 1570 ff_ipc_exit(); 1571 #endif 1572 exit(0); 1573 } 1574 for (;;) { 1575 time_t now; 1576 n = read(s, msg, 2048); 1577 now = time(NULL); 1578 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1579 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1580 } 1581 } 1582 #endif 1583 1584 static int 1585 rtmsg(int cmd, int flags, int fib) 1586 { 1587 int rlen; 1588 char *cp = m_rtmsg.m_space; 1589 int l; 1590 1591 #define NEXTADDR(w, u) \ 1592 if (rtm_addrs & (w)) { \ 1593 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1594 sizeof(long) : \ 1595 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1596 | (sizeof(long) - 1)); \ 1597 memmove(cp, (char *)&(u), l); \ 1598 cp += l; \ 1599 if (verbose) \ 1600 sodump((struct sockaddr *)&(u), #w); \ 1601 } 1602 1603 errno = 0; 1604 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1605 if (cmd == 'a') 1606 cmd = RTM_ADD; 1607 else if (cmd == 'c') 1608 cmd = RTM_CHANGE; 1609 else if (cmd == 'g' || cmd == 's') { 1610 cmd = RTM_GET; 1611 if (so[RTAX_IFP].ss_family == 0) { 1612 so[RTAX_IFP].ss_family = AF_LINK; 1613 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1614 rtm_addrs |= RTA_IFP; 1615 } 1616 } else 1617 cmd = RTM_DELETE; 1618 #define rtm m_rtmsg.m_rtm 1619 rtm.rtm_type = cmd; 1620 rtm.rtm_flags = flags; 1621 rtm.rtm_version = RTM_VERSION; 1622 rtm.rtm_seq = ++rtm_seq; 1623 rtm.rtm_addrs = rtm_addrs; 1624 rtm.rtm_rmx = rt_metrics; 1625 rtm.rtm_inits = rtm_inits; 1626 1627 NEXTADDR(RTA_DST, so[RTAX_DST]); 1628 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1629 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1630 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1631 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1632 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1633 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1634 if (verbose) 1635 print_rtmsg(&rtm, l); 1636 if (debugonly) 1637 return (0); 1638 #ifndef FSTACK 1639 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1640 #else 1641 if (cmd == RTM_GET) { 1642 rlen = rtioctl((char *)&m_rtmsg, l, sizeof(m_rtmsg)); 1643 } else { 1644 rlen = write(s, (char *)&m_rtmsg, l); 1645 } 1646 if (rlen < 0) { 1647 #endif 1648 switch (errno) { 1649 case EPERM: 1650 err(1, "writing to routing socket"); 1651 break; 1652 case ESRCH: 1653 warnx("route has not been found"); 1654 break; 1655 case EEXIST: 1656 /* Handled by newroute() */ 1657 break; 1658 default: 1659 warn("writing to routing socket"); 1660 } 1661 return (-1); 1662 } 1663 if (cmd == RTM_GET) { 1664 #ifndef FSTACK 1665 do { 1666 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1667 } while (l > 0 && (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid)); 1668 #else 1669 l = rlen; 1670 #endif 1671 if (l < 0) 1672 warn("read from routing socket"); 1673 else 1674 print_getmsg(&rtm, l, fib); 1675 } 1676 #undef rtm 1677 return (0); 1678 } 1679 1680 static const char *const msgtypes[] = { 1681 "", 1682 "RTM_ADD: Add Route", 1683 "RTM_DELETE: Delete Route", 1684 "RTM_CHANGE: Change Metrics or flags", 1685 "RTM_GET: Report Metrics", 1686 "RTM_LOSING: Kernel Suspects Partitioning", 1687 "RTM_REDIRECT: Told to use different route", 1688 "RTM_MISS: Lookup failed on this address", 1689 "RTM_LOCK: fix specified metrics", 1690 "RTM_OLDADD: caused by SIOCADDRT", 1691 "RTM_OLDDEL: caused by SIOCDELRT", 1692 "RTM_RESOLVE: Route created by cloning", 1693 "RTM_NEWADDR: address being added to iface", 1694 "RTM_DELADDR: address being removed from iface", 1695 "RTM_IFINFO: iface status change", 1696 "RTM_NEWMADDR: new multicast group membership on iface", 1697 "RTM_DELMADDR: multicast group membership removed from iface", 1698 "RTM_IFANNOUNCE: interface arrival/departure", 1699 "RTM_IEEE80211: IEEE 802.11 wireless event", 1700 }; 1701 1702 static const char metricnames[] = 1703 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1704 "\1mtu"; 1705 static const char routeflags[] = 1706 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1707 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1708 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1709 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1710 static const char ifnetflags[] = 1711 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1712 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1713 "\017LINK2\020MULTICAST"; 1714 static const char addrnames[] = 1715 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1716 1717 static const char errfmt[] = 1718 "\n%s: truncated route message, only %zu bytes left\n"; 1719 1720 static void 1721 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1722 { 1723 struct if_msghdr *ifm; 1724 struct ifa_msghdr *ifam; 1725 #ifdef RTM_NEWMADDR 1726 struct ifma_msghdr *ifmam; 1727 #endif 1728 struct if_announcemsghdr *ifan; 1729 const char *state; 1730 1731 if (verbose == 0) 1732 return; 1733 if (rtm->rtm_version != RTM_VERSION) { 1734 (void)printf("routing message version %d not understood\n", 1735 rtm->rtm_version); 1736 return; 1737 } 1738 if (rtm->rtm_type < nitems(msgtypes)) 1739 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1740 else 1741 (void)printf("unknown type %d: ", rtm->rtm_type); 1742 (void)printf("len %d, ", rtm->rtm_msglen); 1743 1744 #define REQUIRE(x) do { \ 1745 if (msglen < sizeof(x)) \ 1746 goto badlen; \ 1747 else \ 1748 msglen -= sizeof(x); \ 1749 } while (0) 1750 1751 switch (rtm->rtm_type) { 1752 case RTM_IFINFO: 1753 REQUIRE(struct if_msghdr); 1754 ifm = (struct if_msghdr *)rtm; 1755 (void)printf("if# %d, ", ifm->ifm_index); 1756 switch (ifm->ifm_data.ifi_link_state) { 1757 case LINK_STATE_DOWN: 1758 state = "down"; 1759 break; 1760 case LINK_STATE_UP: 1761 state = "up"; 1762 break; 1763 default: 1764 state = "unknown"; 1765 break; 1766 } 1767 (void)printf("link: %s, flags:", state); 1768 printb(ifm->ifm_flags, ifnetflags); 1769 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1770 break; 1771 case RTM_NEWADDR: 1772 case RTM_DELADDR: 1773 REQUIRE(struct ifa_msghdr); 1774 ifam = (struct ifa_msghdr *)rtm; 1775 (void)printf("metric %d, flags:", ifam->ifam_metric); 1776 printb(ifam->ifam_flags, routeflags); 1777 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1778 break; 1779 #ifdef RTM_NEWMADDR 1780 case RTM_NEWMADDR: 1781 case RTM_DELMADDR: 1782 REQUIRE(struct ifma_msghdr); 1783 ifmam = (struct ifma_msghdr *)rtm; 1784 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1785 break; 1786 #endif 1787 case RTM_IFANNOUNCE: 1788 REQUIRE(struct if_announcemsghdr); 1789 ifan = (struct if_announcemsghdr *)rtm; 1790 (void)printf("if# %d, what: ", ifan->ifan_index); 1791 switch (ifan->ifan_what) { 1792 case IFAN_ARRIVAL: 1793 (void)printf("arrival"); 1794 break; 1795 case IFAN_DEPARTURE: 1796 printf("departure"); 1797 break; 1798 default: 1799 printf("#%d", ifan->ifan_what); 1800 break; 1801 } 1802 printf("\n"); 1803 fflush(stdout); 1804 break; 1805 1806 default: 1807 printf("pid: %ld, seq %d, errno %d, flags:", 1808 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1809 printb(rtm->rtm_flags, routeflags); 1810 pmsg_common(rtm, msglen); 1811 } 1812 1813 return; 1814 1815 badlen: 1816 (void)printf(errfmt, __func__, msglen); 1817 #undef REQUIRE 1818 } 1819 1820 static void 1821 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1822 { 1823 struct sockaddr *sp[RTAX_MAX]; 1824 struct timespec ts; 1825 char *cp; 1826 int i; 1827 1828 memset(sp, 0, sizeof(sp)); 1829 (void)printf(" route to: %s\n", 1830 routename((struct sockaddr *)&so[RTAX_DST])); 1831 if (rtm->rtm_version != RTM_VERSION) { 1832 warnx("routing message version %d not understood", 1833 rtm->rtm_version); 1834 return; 1835 } 1836 if (rtm->rtm_msglen > msglen) { 1837 warnx("message length mismatch, in packet %d, returned %d", 1838 rtm->rtm_msglen, msglen); 1839 return; 1840 } 1841 if (rtm->rtm_errno) { 1842 errno = rtm->rtm_errno; 1843 warn("message indicates error %d", errno); 1844 return; 1845 } 1846 cp = ((char *)(rtm + 1)); 1847 for (i = 0; i < RTAX_MAX; i++) 1848 if (rtm->rtm_addrs & (1 << i)) { 1849 sp[i] = (struct sockaddr *)cp; 1850 cp += SA_SIZE((struct sockaddr *)cp); 1851 } 1852 if ((rtm->rtm_addrs & RTA_IFP) && 1853 (sp[RTAX_IFP]->sa_family != AF_LINK || 1854 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1855 sp[RTAX_IFP] = NULL; 1856 if (sp[RTAX_DST]) 1857 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1858 if (sp[RTAX_NETMASK]) 1859 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1860 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1861 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1862 if (fib >= 0) 1863 (void)printf(" fib: %u\n", (unsigned int)fib); 1864 if (sp[RTAX_IFP]) 1865 (void)printf(" interface: %.*s\n", 1866 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1867 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1868 (void)printf(" flags: "); 1869 printb(rtm->rtm_flags, routeflags); 1870 1871 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1872 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1873 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1874 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1875 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1876 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1877 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1878 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1879 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1880 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1881 if (rtm->rtm_rmx.rmx_expire > 0) 1882 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1883 else 1884 ts.tv_sec = 0; 1885 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1886 lock(EXPIRE)); 1887 #undef lock 1888 #undef msec 1889 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1890 if (verbose) 1891 pmsg_common(rtm, msglen); 1892 else if (rtm->rtm_addrs &~ RTA_IGN) { 1893 (void)printf("sockaddrs: "); 1894 printb(rtm->rtm_addrs, addrnames); 1895 putchar('\n'); 1896 } 1897 #undef RTA_IGN 1898 } 1899 1900 static void 1901 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1902 { 1903 1904 (void)printf("\nlocks: "); 1905 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1906 (void)printf(" inits: "); 1907 printb(rtm->rtm_inits, metricnames); 1908 if (msglen > sizeof(struct rt_msghdr)) 1909 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1910 msglen - sizeof(struct rt_msghdr)); 1911 else 1912 (void)fflush(stdout); 1913 } 1914 1915 static void 1916 pmsg_addrs(char *cp, int addrs, size_t len) 1917 { 1918 struct sockaddr *sa; 1919 int i; 1920 1921 if (addrs == 0) { 1922 (void)putchar('\n'); 1923 return; 1924 } 1925 (void)printf("\nsockaddrs: "); 1926 printb(addrs, addrnames); 1927 putchar('\n'); 1928 for (i = 0; i < RTAX_MAX; i++) 1929 if (addrs & (1 << i)) { 1930 sa = (struct sockaddr *)cp; 1931 if (len == 0 || len < SA_SIZE(sa)) { 1932 (void)printf(errfmt, __func__, len); 1933 break; 1934 } 1935 (void)printf(" %s", routename(sa)); 1936 len -= SA_SIZE(sa); 1937 cp += SA_SIZE(sa); 1938 } 1939 (void)putchar('\n'); 1940 (void)fflush(stdout); 1941 } 1942 1943 static void 1944 printb(int b, const char *str) 1945 { 1946 int i; 1947 int gotsome = 0; 1948 1949 if (b == 0) 1950 return; 1951 while ((i = *str++) != 0) { 1952 if (b & (1 << (i-1))) { 1953 if (gotsome == 0) 1954 i = '<'; 1955 else 1956 i = ','; 1957 putchar(i); 1958 gotsome = 1; 1959 for (; (i = *str) > 32; str++) 1960 putchar(i); 1961 } else 1962 while (*str > 32) 1963 str++; 1964 } 1965 if (gotsome) 1966 putchar('>'); 1967 } 1968 1969 int 1970 keyword(const char *cp) 1971 { 1972 const struct keytab *kt = keywords; 1973 1974 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1975 kt++; 1976 return (kt->kt_i); 1977 } 1978 1979 static void 1980 sodump(struct sockaddr *sa, const char *which) 1981 { 1982 #ifdef INET6 1983 char nbuf[INET6_ADDRSTRLEN]; 1984 #endif 1985 1986 switch (sa->sa_family) { 1987 case AF_LINK: 1988 (void)printf("%s: link %s; ", which, 1989 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1990 break; 1991 #ifdef INET 1992 case AF_INET: 1993 (void)printf("%s: inet %s; ", which, 1994 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1995 break; 1996 #endif 1997 #ifdef INET6 1998 case AF_INET6: 1999 #ifdef FSTACK 2000 (void)printf("%s: inet6 %s; ", which, inet_ntop(AF_INET6_LINUX, 2001 #else 2002 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 2003 #endif 2004 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 2005 sizeof(nbuf))); 2006 break; 2007 #endif 2008 } 2009 (void)fflush(stdout); 2010 } 2011 2012 /* States*/ 2013 #define VIRGIN 0 2014 #define GOTONE 1 2015 #define GOTTWO 2 2016 /* Inputs */ 2017 #define DIGIT (4*0) 2018 #define END (4*1) 2019 #define DELIM (4*2) 2020 2021 static void 2022 sockaddr(char *addr, struct sockaddr *sa, size_t size) 2023 { 2024 char *cp = (char *)sa; 2025 char *cplim = cp + size; 2026 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 2027 2028 memset(cp, 0, size); 2029 cp++; 2030 do { 2031 if ((*addr >= '0') && (*addr <= '9')) { 2032 new = *addr - '0'; 2033 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2034 new = *addr - 'a' + 10; 2035 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2036 new = *addr - 'A' + 10; 2037 } else if (*addr == '\0') 2038 state |= END; 2039 else 2040 state |= DELIM; 2041 addr++; 2042 switch (state /* | INPUT */) { 2043 case GOTTWO | DIGIT: 2044 *cp++ = byte; /*FALLTHROUGH*/ 2045 case VIRGIN | DIGIT: 2046 state = GOTONE; byte = new; continue; 2047 case GOTONE | DIGIT: 2048 state = GOTTWO; byte = new + (byte << 4); continue; 2049 default: /* | DELIM */ 2050 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2051 case GOTONE | END: 2052 case GOTTWO | END: 2053 *cp++ = byte; /* FALLTHROUGH */ 2054 case VIRGIN | END: 2055 break; 2056 } 2057 break; 2058 } while (cp < cplim); 2059 sa->sa_len = cp - (char *)sa; 2060 } 2061