1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #endif /* not lint */ 40 41 #include <sys/cdefs.h> 42 #include <sys/param.h> 43 #include <sys/file.h> 44 #include <sys/socket.h> 45 #include <sys/ioctl.h> 46 #ifdef JAIL 47 #include <sys/jail.h> 48 #endif 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 <arpa/inet.h> 59 #include <netdb.h> 60 61 #include <ctype.h> 62 #include <err.h> 63 #include <errno.h> 64 #ifdef JAIL 65 #include <jail.h> 66 #endif 67 #include <paths.h> 68 #include <signal.h> 69 #include <stdbool.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <string.h> 73 #include <sysexits.h> 74 #include <time.h> 75 #include <unistd.h> 76 #include <ifaddrs.h> 77 78 struct fibl { 79 TAILQ_ENTRY(fibl) fl_next; 80 81 int fl_num; 82 int fl_error; 83 int fl_errno; 84 }; 85 86 static struct keytab { 87 const char *kt_cp; 88 int kt_i; 89 } const keywords[] = { 90 #include "keywords.h" 91 {0, 0} 92 }; 93 94 int verbose, debugonly; 95 #ifdef JAIL 96 char * jail_name; 97 #endif 98 static struct sockaddr_storage so[RTAX_MAX]; 99 static int pid, rtm_addrs; 100 static int nflag, af, aflen, qflag, tflag; 101 static int locking, lockrest; 102 static struct rt_metrics rt_metrics; 103 static u_long rtm_inits; 104 static uid_t uid; 105 static int defaultfib; 106 static int numfibs; 107 static char domain[MAXHOSTNAMELEN + 1]; 108 static bool domain_initialized; 109 static char rt_line[NI_MAXHOST]; 110 static char net_line[MAXHOSTNAMELEN + 1]; 111 112 #ifdef WITHOUT_NETLINK 113 static int s; 114 static int rtm_seq; 115 116 static struct { 117 struct rt_msghdr m_rtm; 118 char m_space[512]; 119 } m_rtmsg; 120 121 static int rtmsg_rtsock(int, int, int); 122 static int flushroutes_fib_rtsock(int); 123 static void monitor_rtsock(void); 124 #else 125 int rtmsg_nl(int, int, int, int, struct sockaddr_storage *, struct rt_metrics *); 126 int flushroutes_fib_nl(int, int); 127 void monitor_nl(int); 128 #endif 129 130 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 131 132 void printb(int, const char *); 133 static void flushroutes(int argc, char *argv[]); 134 static int flushroutes_fib(int); 135 static int getaddr(int, char *, int); 136 static int keyword(const char *); 137 #ifdef INET 138 static void inet_makemask(struct sockaddr_in *, u_long); 139 #endif 140 #ifdef INET6 141 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 142 #endif 143 static void interfaces(void); 144 static void monitor(int, char*[]); 145 const char *netname(struct sockaddr *); 146 static void newroute(int, char **); 147 static int newroute_fib(int, char *, int); 148 static void pmsg_addrs(char *, int, size_t); 149 static void pmsg_common(struct rt_msghdr *, size_t); 150 static int prefixlen(const char *); 151 static void print_getmsg(struct rt_msghdr *, int, int); 152 static void print_rtmsg(struct rt_msghdr *, size_t); 153 const char *routename(struct sockaddr *); 154 static int rtmsg(int, int, int); 155 static void set_metric(char *, int); 156 static int set_sofib(int); 157 static void sockaddr(char *, struct sockaddr *, size_t); 158 static void sodump(struct sockaddr *, const char *); 159 static int fiboptlist_csv(const char *, struct fibl_head_t *); 160 static int fiboptlist_range(const char *, struct fibl_head_t *); 161 162 static void usage(const char *) __dead2; 163 164 #define READ_TIMEOUT 10 165 static volatile sig_atomic_t stop_read; 166 167 static void 168 stopit(int sig __unused) 169 { 170 171 stop_read = 1; 172 } 173 174 static void 175 usage(const char *cp) 176 { 177 if (cp != NULL) 178 warnx("bad keyword: %s", cp); 179 errx(EX_USAGE, "usage: route [-j jail] [-46dnqtv] command [[modifiers] args]"); 180 /* NOTREACHED */ 181 } 182 183 int 184 main(int argc, char **argv) 185 { 186 int ch; 187 #ifdef JAIL 188 int jid; 189 #endif 190 size_t len; 191 192 if (argc < 2) 193 usage(NULL); 194 195 while ((ch = getopt(argc, argv, "46nqdtvj:")) != -1) 196 switch(ch) { 197 case '4': 198 #ifdef INET 199 af = AF_INET; 200 aflen = sizeof(struct sockaddr_in); 201 #else 202 errx(1, "IPv4 support is not compiled in"); 203 #endif 204 break; 205 case '6': 206 #ifdef INET6 207 af = AF_INET6; 208 aflen = sizeof(struct sockaddr_in6); 209 #else 210 errx(1, "IPv6 support is not compiled in"); 211 #endif 212 break; 213 case 'n': 214 nflag = 1; 215 break; 216 case 'q': 217 qflag = 1; 218 break; 219 case 'v': 220 verbose = 1; 221 break; 222 case 't': 223 tflag = 1; 224 break; 225 case 'd': 226 debugonly = 1; 227 break; 228 case 'j': 229 #ifdef JAIL 230 if (optarg == NULL) 231 usage(NULL); 232 jail_name = optarg; 233 #else 234 errx(1, "Jail support is not compiled in"); 235 #endif 236 break; 237 case '?': 238 default: 239 usage(NULL); 240 } 241 argc -= optind; 242 argv += optind; 243 244 pid = getpid(); 245 uid = geteuid(); 246 247 #ifdef JAIL 248 if (jail_name != NULL) { 249 jid = jail_getid(jail_name); 250 if (jid == -1) 251 errx(1, "Jail not found"); 252 if (jail_attach(jid) != 0) 253 errx(1, "Cannot attach to jail"); 254 } 255 #endif 256 257 #ifdef WITHOUT_NETLINK 258 if (tflag) 259 s = open(_PATH_DEVNULL, O_WRONLY, 0); 260 else 261 s = socket(PF_ROUTE, SOCK_RAW, 0); 262 if (s < 0) 263 err(EX_OSERR, "socket"); 264 #endif 265 266 len = sizeof(numfibs); 267 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 268 numfibs = -1; 269 270 len = sizeof(defaultfib); 271 if (numfibs != -1 && 272 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 273 0) == -1) 274 defaultfib = -1; 275 276 if (*argv != NULL) 277 switch (keyword(*argv)) { 278 case K_GET: 279 case K_SHOW: 280 uid = 0; 281 /* FALLTHROUGH */ 282 283 case K_CHANGE: 284 case K_ADD: 285 case K_DEL: 286 case K_DELETE: 287 newroute(argc, argv); 288 /* NOTREACHED */ 289 290 case K_MONITOR: 291 monitor(argc, argv); 292 /* NOTREACHED */ 293 294 case K_FLUSH: 295 flushroutes(argc, argv); 296 exit(0); 297 /* NOTREACHED */ 298 } 299 usage(*argv); 300 /* NOTREACHED */ 301 } 302 303 static int 304 set_sofib(int fib) 305 { 306 307 #ifdef WITHOUT_NETLINK 308 if (fib < 0) 309 return (0); 310 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 311 sizeof(fib))); 312 #else 313 return (0); 314 #endif 315 } 316 317 static int 318 fiboptlist_range(const char *arg, struct fibl_head_t *flh) 319 { 320 struct fibl *fl; 321 char *str0, *str, *token, *endptr; 322 int fib[2], i, error; 323 324 str0 = str = strdup(arg); 325 error = 0; 326 i = 0; 327 while ((token = strsep(&str, "-")) != NULL) { 328 switch (i) { 329 case 0: 330 case 1: 331 errno = 0; 332 fib[i] = strtol(token, &endptr, 0); 333 if (errno == 0) { 334 if (*endptr != '\0' || 335 fib[i] < 0 || 336 (numfibs != -1 && fib[i] > numfibs - 1)) 337 errno = EINVAL; 338 } 339 if (errno) 340 error = 1; 341 break; 342 default: 343 error = 1; 344 } 345 if (error) 346 goto fiboptlist_range_ret; 347 i++; 348 } 349 if (fib[0] >= fib[1]) { 350 error = 1; 351 goto fiboptlist_range_ret; 352 } 353 for (i = fib[0]; i <= fib[1]; i++) { 354 fl = calloc(1, sizeof(*fl)); 355 if (fl == NULL) { 356 error = 1; 357 goto fiboptlist_range_ret; 358 } 359 fl->fl_num = i; 360 TAILQ_INSERT_TAIL(flh, fl, fl_next); 361 } 362 fiboptlist_range_ret: 363 free(str0); 364 return (error); 365 } 366 367 #define ALLSTRLEN 64 368 static int 369 fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 370 { 371 struct fibl *fl; 372 char *str0, *str, *token, *endptr; 373 int fib, error; 374 375 str0 = str = NULL; 376 if (strcmp("all", arg) == 0) { 377 str = calloc(1, ALLSTRLEN); 378 if (str == NULL) { 379 error = 1; 380 goto fiboptlist_csv_ret; 381 } 382 if (numfibs > 1) 383 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 384 else 385 snprintf(str, ALLSTRLEN - 1, "%d", 0); 386 } else if (strcmp("default", arg) == 0) { 387 str0 = str = calloc(1, ALLSTRLEN); 388 if (str == NULL) { 389 error = 1; 390 goto fiboptlist_csv_ret; 391 } 392 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 393 } else 394 str0 = str = strdup(arg); 395 396 error = 0; 397 while ((token = strsep(&str, ",")) != NULL) { 398 if (*token != '-' && strchr(token, '-') != NULL) { 399 error = fiboptlist_range(token, flh); 400 if (error) 401 goto fiboptlist_csv_ret; 402 } else { 403 errno = 0; 404 fib = strtol(token, &endptr, 0); 405 if (errno == 0) { 406 if (*endptr != '\0' || 407 fib < 0 || 408 (numfibs != -1 && fib > numfibs - 1)) 409 errno = EINVAL; 410 } 411 if (errno) { 412 error = 1; 413 goto fiboptlist_csv_ret; 414 } 415 fl = calloc(1, sizeof(*fl)); 416 if (fl == NULL) { 417 error = 1; 418 goto fiboptlist_csv_ret; 419 } 420 fl->fl_num = fib; 421 TAILQ_INSERT_TAIL(flh, fl, fl_next); 422 } 423 } 424 fiboptlist_csv_ret: 425 if (str0 != NULL) 426 free(str0); 427 return (error); 428 } 429 430 /* 431 * Purge all entries in the routing tables not 432 * associated with network interfaces. 433 */ 434 static void 435 flushroutes(int argc, char *argv[]) 436 { 437 struct fibl *fl; 438 int error; 439 440 if (uid != 0 && !debugonly && !tflag) 441 errx(EX_NOPERM, "must be root to alter routing table"); 442 #ifdef WITHOUT_NETLINK 443 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 444 #endif 445 446 TAILQ_INIT(&fibl_head); 447 while (argc > 1) { 448 argc--; 449 argv++; 450 if (**argv != '-') 451 usage(*argv); 452 switch (keyword(*argv + 1)) { 453 #ifdef INET 454 case K_4: 455 case K_INET: 456 af = AF_INET; 457 break; 458 #endif 459 #ifdef INET6 460 case K_6: 461 case K_INET6: 462 af = AF_INET6; 463 break; 464 #endif 465 case K_LINK: 466 af = AF_LINK; 467 break; 468 case K_FIB: 469 if (!--argc) 470 usage(*argv); 471 error = fiboptlist_csv(*++argv, &fibl_head); 472 if (error) 473 errx(EX_USAGE, "invalid fib number: %s", *argv); 474 break; 475 default: 476 usage(*argv); 477 } 478 } 479 if (TAILQ_EMPTY(&fibl_head)) { 480 error = fiboptlist_csv("default", &fibl_head); 481 if (error) 482 errx(EX_OSERR, "fiboptlist_csv failed."); 483 } 484 TAILQ_FOREACH(fl, &fibl_head, fl_next) 485 flushroutes_fib(fl->fl_num); 486 } 487 488 static int 489 flushroutes_fib(int fib) 490 { 491 #ifdef WITHOUT_NETLINK 492 return (flushroutes_fib_rtsock(fib)); 493 #else 494 return (flushroutes_fib_nl(fib, af)); 495 #endif 496 } 497 498 #ifdef WITHOUT_NETLINK 499 static int 500 flushroutes_fib_rtsock(int fib) 501 { 502 struct rt_msghdr *rtm; 503 size_t needed; 504 char *buf, *next, *lim; 505 int mib[7], rlen, seqno, count = 0; 506 int error; 507 508 error = set_sofib(fib); 509 if (error) { 510 warn("fib number %d is ignored", fib); 511 return (error); 512 } 513 514 retry: 515 mib[0] = CTL_NET; 516 mib[1] = PF_ROUTE; 517 mib[2] = 0; /* protocol */ 518 mib[3] = AF_UNSPEC; 519 mib[4] = NET_RT_DUMP; 520 mib[5] = 0; /* no flags */ 521 mib[6] = fib; 522 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 523 err(EX_OSERR, "route-sysctl-estimate"); 524 if ((buf = malloc(needed)) == NULL) 525 errx(EX_OSERR, "malloc failed"); 526 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 527 if (errno == ENOMEM && count++ < 10) { 528 warnx("Routing table grew, retrying"); 529 sleep(1); 530 free(buf); 531 goto retry; 532 } 533 err(EX_OSERR, "route-sysctl-get"); 534 } 535 lim = buf + needed; 536 if (verbose) 537 (void)printf("Examining routing table from sysctl\n"); 538 seqno = 0; /* ??? */ 539 for (next = buf; next < lim; next += rtm->rtm_msglen) { 540 rtm = (struct rt_msghdr *)(void *)next; 541 if (verbose) 542 print_rtmsg(rtm, rtm->rtm_msglen); 543 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 544 continue; 545 if (af != 0) { 546 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 547 548 if (sa->sa_family != af) 549 continue; 550 } 551 if (debugonly) 552 continue; 553 rtm->rtm_type = RTM_DELETE; 554 rtm->rtm_seq = seqno; 555 rlen = write(s, next, rtm->rtm_msglen); 556 if (rlen < 0 && errno == EPERM) 557 err(1, "write to routing socket"); 558 if (rlen < (int)rtm->rtm_msglen) { 559 warn("write to routing socket"); 560 (void)printf("got only %d for rlen\n", rlen); 561 free(buf); 562 goto retry; 563 break; 564 } 565 seqno++; 566 if (qflag) 567 continue; 568 if (verbose) 569 print_rtmsg(rtm, rlen); 570 else { 571 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 572 573 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 574 routename(sa) : netname(sa)); 575 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 576 printf("%-20.20s ", routename(sa)); 577 if (fib >= 0) 578 printf("-fib %-3d ", fib); 579 printf("done\n"); 580 } 581 } 582 free(buf); 583 return (error); 584 } 585 #endif 586 587 const char * 588 routename(struct sockaddr *sa) 589 { 590 struct sockaddr_dl *sdl; 591 const char *cp; 592 int n; 593 594 if (!domain_initialized) { 595 domain_initialized = true; 596 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 597 (cp = strchr(domain, '.'))) { 598 domain[MAXHOSTNAMELEN] = '\0'; 599 (void)strcpy(domain, cp + 1); 600 } else 601 domain[0] = '\0'; 602 } 603 604 /* If the address is zero-filled, use "default". */ 605 if (sa->sa_len == 0 && nflag == 0) 606 return ("default"); 607 #if defined(INET) || defined(INET6) 608 switch (sa->sa_family) { 609 #ifdef INET 610 case AF_INET: 611 /* If the address is zero-filled, use "default". */ 612 if (nflag == 0 && 613 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 614 INADDR_ANY) 615 return("default"); 616 break; 617 #endif 618 #ifdef INET6 619 case AF_INET6: 620 /* If the address is zero-filled, use "default". */ 621 if (nflag == 0 && 622 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 623 return("default"); 624 break; 625 #endif 626 } 627 #endif 628 629 switch (sa->sa_family) { 630 #if defined(INET) || defined(INET6) 631 #ifdef INET 632 case AF_INET: 633 #endif 634 #ifdef INET6 635 case AF_INET6: 636 #endif 637 { 638 struct sockaddr_storage ss; 639 int error; 640 char *p; 641 642 memset(&ss, 0, sizeof(ss)); 643 if (sa->sa_len == 0) 644 ss.ss_family = sa->sa_family; 645 else 646 memcpy(&ss, sa, sa->sa_len); 647 /* Expand sa->sa_len because it could be shortened. */ 648 if (sa->sa_family == AF_INET) 649 ss.ss_len = sizeof(struct sockaddr_in); 650 else if (sa->sa_family == AF_INET6) 651 ss.ss_len = sizeof(struct sockaddr_in6); 652 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 653 rt_line, sizeof(rt_line), NULL, 0, 654 (nflag == 0) ? 0 : NI_NUMERICHOST); 655 if (error) { 656 warnx("getnameinfo(): %s", gai_strerror(error)); 657 strncpy(rt_line, "invalid", sizeof(rt_line)); 658 } 659 660 /* Remove the domain part if any. */ 661 p = strchr(rt_line, '.'); 662 if (p != NULL && strcmp(p + 1, domain) == 0) 663 *p = '\0'; 664 665 return (rt_line); 666 break; 667 } 668 #endif 669 case AF_LINK: 670 sdl = (struct sockaddr_dl *)(void *)sa; 671 672 if (sdl->sdl_nlen == 0 && 673 sdl->sdl_alen == 0 && 674 sdl->sdl_slen == 0) { 675 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 676 sdl->sdl_index); 677 if (n > (int)sizeof(rt_line)) 678 rt_line[0] = '\0'; 679 return (rt_line); 680 } else 681 return (link_ntoa(sdl)); 682 break; 683 684 default: 685 { 686 u_short *sp = (u_short *)(void *)sa; 687 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 688 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 689 char *cpe = rt_line + sizeof(rt_line); 690 691 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 692 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 693 cps += n; 694 else 695 *cps = '\0'; 696 break; 697 } 698 } 699 return (rt_line); 700 } 701 702 /* 703 * Return the name of the network whose address is given. 704 * The address is assumed to be that of a net, not a host. 705 */ 706 const char * 707 netname(struct sockaddr *sa) 708 { 709 struct sockaddr_dl *sdl; 710 int n; 711 #ifdef INET 712 struct netent *np = NULL; 713 const char *cp = NULL; 714 u_long i; 715 #endif 716 717 switch (sa->sa_family) { 718 #ifdef INET 719 case AF_INET: 720 { 721 struct in_addr in; 722 723 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 724 i = in.s_addr = ntohl(in.s_addr); 725 if (in.s_addr == 0) 726 cp = "default"; 727 else if (!nflag) { 728 np = getnetbyaddr(i, AF_INET); 729 if (np != NULL) 730 cp = np->n_name; 731 } 732 #define C(x) (unsigned)((x) & 0xff) 733 if (cp != NULL) 734 strncpy(net_line, cp, sizeof(net_line)); 735 else if ((in.s_addr & 0xffffff) == 0) 736 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 737 else if ((in.s_addr & 0xffff) == 0) 738 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 739 C(in.s_addr >> 16)); 740 else if ((in.s_addr & 0xff) == 0) 741 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 742 C(in.s_addr >> 16), C(in.s_addr >> 8)); 743 else 744 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 745 C(in.s_addr >> 16), C(in.s_addr >> 8), 746 C(in.s_addr)); 747 #undef C 748 break; 749 } 750 #endif 751 #ifdef INET6 752 case AF_INET6: 753 { 754 struct sockaddr_in6 sin6; 755 int niflags = 0; 756 757 memset(&sin6, 0, sizeof(sin6)); 758 memcpy(&sin6, sa, sa->sa_len); 759 sin6.sin6_len = sizeof(sin6); 760 sin6.sin6_family = AF_INET6; 761 if (nflag) 762 niflags |= NI_NUMERICHOST; 763 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 764 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 765 strncpy(net_line, "invalid", sizeof(net_line)); 766 767 return(net_line); 768 } 769 #endif 770 case AF_LINK: 771 sdl = (struct sockaddr_dl *)(void *)sa; 772 773 if (sdl->sdl_nlen == 0 && 774 sdl->sdl_alen == 0 && 775 sdl->sdl_slen == 0) { 776 n = snprintf(net_line, sizeof(net_line), "link#%d", 777 sdl->sdl_index); 778 if (n > (int)sizeof(net_line)) 779 net_line[0] = '\0'; 780 return (net_line); 781 } else 782 return (link_ntoa(sdl)); 783 break; 784 785 default: 786 { 787 u_short *sp = (u_short *)(void *)sa->sa_data; 788 u_short *splim = sp + ((sa->sa_len + 1)>>1); 789 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 790 char *cpe = net_line + sizeof(net_line); 791 792 while (sp < splim && cps < cpe) 793 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 794 cps += n; 795 else 796 *cps = '\0'; 797 break; 798 } 799 } 800 return (net_line); 801 } 802 803 static void 804 set_metric(char *value, int key) 805 { 806 int flag = 0; 807 char *endptr; 808 u_long noval, *valp = &noval; 809 810 switch (key) { 811 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 812 caseof(K_MTU, RTV_MTU, rmx_mtu); 813 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 814 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 815 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 816 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 817 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 818 caseof(K_RTT, RTV_RTT, rmx_rtt); 819 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 820 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 821 } 822 rtm_inits |= flag; 823 if (lockrest || locking) 824 rt_metrics.rmx_locks |= flag; 825 if (locking) 826 locking = 0; 827 errno = 0; 828 *valp = strtol(value, &endptr, 0); 829 if (errno == 0 && *endptr != '\0') 830 errno = EINVAL; 831 if (errno) 832 err(EX_USAGE, "%s", value); 833 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 834 struct timespec ts; 835 836 clock_gettime(CLOCK_REALTIME_FAST, &ts); 837 *valp += ts.tv_sec; 838 } 839 } 840 841 #define F_ISHOST 0x01 842 #define F_FORCENET 0x02 843 #define F_FORCEHOST 0x04 844 #define F_PROXY 0x08 845 #define F_INTERFACE 0x10 846 847 static void 848 newroute(int argc, char **argv) 849 { 850 struct sigaction sa; 851 struct fibl *fl; 852 char *cmd; 853 const char *dest, *gateway, *errmsg; 854 int key, error, flags, nrflags, fibnum; 855 856 if (uid != 0 && !debugonly && !tflag) 857 errx(EX_NOPERM, "must be root to alter routing table"); 858 dest = NULL; 859 gateway = NULL; 860 flags = RTF_STATIC; 861 nrflags = 0; 862 TAILQ_INIT(&fibl_head); 863 864 sigemptyset(&sa.sa_mask); 865 sa.sa_flags = 0; 866 sa.sa_handler = stopit; 867 if (sigaction(SIGALRM, &sa, 0) == -1) 868 warn("sigaction SIGALRM"); 869 870 cmd = argv[0]; 871 #ifdef WITHOUT_NETLINK 872 if (*cmd != 'g' && *cmd != 's') 873 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 874 #endif 875 while (--argc > 0) { 876 if (**(++argv)== '-') { 877 switch (key = keyword(1 + *argv)) { 878 case K_LINK: 879 af = AF_LINK; 880 aflen = sizeof(struct sockaddr_dl); 881 break; 882 #ifdef INET 883 case K_4: 884 case K_INET: 885 af = AF_INET; 886 aflen = sizeof(struct sockaddr_in); 887 break; 888 #endif 889 #ifdef INET6 890 case K_6: 891 case K_INET6: 892 af = AF_INET6; 893 aflen = sizeof(struct sockaddr_in6); 894 break; 895 #endif 896 case K_SA: 897 af = PF_ROUTE; 898 aflen = sizeof(struct sockaddr_storage); 899 break; 900 case K_IFACE: 901 case K_INTERFACE: 902 nrflags |= F_INTERFACE; 903 break; 904 case K_NOSTATIC: 905 flags &= ~RTF_STATIC; 906 break; 907 case K_LOCK: 908 locking = 1; 909 break; 910 case K_LOCKREST: 911 lockrest = 1; 912 break; 913 case K_HOST: 914 nrflags |= F_FORCEHOST; 915 break; 916 case K_REJECT: 917 flags |= RTF_REJECT; 918 break; 919 case K_BLACKHOLE: 920 flags |= RTF_BLACKHOLE; 921 break; 922 case K_PROTO1: 923 flags |= RTF_PROTO1; 924 break; 925 case K_PROTO2: 926 flags |= RTF_PROTO2; 927 break; 928 case K_PROXY: 929 nrflags |= F_PROXY; 930 break; 931 case K_XRESOLVE: 932 flags |= RTF_XRESOLVE; 933 break; 934 case K_STATIC: 935 flags |= RTF_STATIC; 936 break; 937 case K_STICKY: 938 flags |= RTF_STICKY; 939 break; 940 case K_NOSTICK: 941 flags &= ~RTF_STICKY; 942 break; 943 case K_FIB: 944 if (!--argc) 945 usage(NULL); 946 error = fiboptlist_csv(*++argv, &fibl_head); 947 if (error) 948 errx(EX_USAGE, 949 "invalid fib number: %s", *argv); 950 break; 951 case K_IFA: 952 if (!--argc) 953 usage(NULL); 954 getaddr(RTAX_IFA, *++argv, nrflags); 955 break; 956 case K_IFP: 957 if (!--argc) 958 usage(NULL); 959 getaddr(RTAX_IFP, *++argv, nrflags); 960 break; 961 case K_GENMASK: 962 if (!--argc) 963 usage(NULL); 964 getaddr(RTAX_GENMASK, *++argv, nrflags); 965 break; 966 case K_GATEWAY: 967 if (!--argc) 968 usage(NULL); 969 getaddr(RTAX_GATEWAY, *++argv, nrflags); 970 gateway = *argv; 971 break; 972 case K_DST: 973 if (!--argc) 974 usage(NULL); 975 if (getaddr(RTAX_DST, *++argv, nrflags)) 976 nrflags |= F_ISHOST; 977 dest = *argv; 978 break; 979 case K_NETMASK: 980 if (!--argc) 981 usage(NULL); 982 getaddr(RTAX_NETMASK, *++argv, nrflags); 983 /* FALLTHROUGH */ 984 case K_NET: 985 nrflags |= F_FORCENET; 986 break; 987 case K_PREFIXLEN: 988 if (!--argc) 989 usage(NULL); 990 if (prefixlen(*++argv) == -1) { 991 nrflags &= ~F_FORCENET; 992 nrflags |= F_ISHOST; 993 } else { 994 nrflags |= F_FORCENET; 995 nrflags &= ~F_ISHOST; 996 } 997 break; 998 case K_MTU: 999 case K_HOPCOUNT: 1000 case K_EXPIRE: 1001 case K_RECVPIPE: 1002 case K_SENDPIPE: 1003 case K_SSTHRESH: 1004 case K_RTT: 1005 case K_RTTVAR: 1006 case K_WEIGHT: 1007 if (!--argc) 1008 usage(NULL); 1009 set_metric(*++argv, key); 1010 break; 1011 default: 1012 usage(1+*argv); 1013 } 1014 } else { 1015 if ((rtm_addrs & RTA_DST) == 0) { 1016 dest = *argv; 1017 if (getaddr(RTAX_DST, *argv, nrflags)) 1018 nrflags |= F_ISHOST; 1019 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 1020 gateway = *argv; 1021 getaddr(RTAX_GATEWAY, *argv, nrflags); 1022 } else { 1023 getaddr(RTAX_NETMASK, *argv, nrflags); 1024 nrflags |= F_FORCENET; 1025 } 1026 } 1027 } 1028 1029 /* Do some sanity checks on resulting request */ 1030 if (so[RTAX_DST].ss_len == 0) { 1031 warnx("destination parameter required"); 1032 usage(NULL); 1033 } 1034 1035 if (so[RTAX_NETMASK].ss_len != 0 && 1036 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 1037 warnx("destination and netmask family need to be the same"); 1038 usage(NULL); 1039 } 1040 1041 if (nrflags & F_FORCEHOST) { 1042 nrflags |= F_ISHOST; 1043 #ifdef INET6 1044 if (af == AF_INET6) { 1045 rtm_addrs &= ~RTA_NETMASK; 1046 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 1047 } 1048 #endif 1049 } 1050 if (nrflags & F_FORCENET) 1051 nrflags &= ~F_ISHOST; 1052 flags |= RTF_UP; 1053 if (nrflags & F_ISHOST) 1054 flags |= RTF_HOST; 1055 if ((nrflags & F_INTERFACE) == 0) 1056 flags |= RTF_GATEWAY; 1057 if (nrflags & F_PROXY) 1058 flags |= RTF_ANNOUNCE; 1059 if (dest == NULL) 1060 dest = ""; 1061 if (gateway == NULL) 1062 gateway = ""; 1063 1064 if (TAILQ_EMPTY(&fibl_head)) { 1065 error = fiboptlist_csv("default", &fibl_head); 1066 if (error) 1067 errx(EX_OSERR, "fiboptlist_csv failed."); 1068 } 1069 error = 0; 1070 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1071 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1072 if (fl->fl_error) 1073 fl->fl_errno = errno; 1074 error += fl->fl_error; 1075 } 1076 if (*cmd == 'g' || *cmd == 's') 1077 exit(error); 1078 1079 error = 0; 1080 if (!qflag) { 1081 fibnum = 0; 1082 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1083 if (fl->fl_error == 0) 1084 fibnum++; 1085 } 1086 if (fibnum > 0) { 1087 int firstfib = 1; 1088 1089 printf("%s %s %s", cmd, 1090 (nrflags & F_ISHOST) ? "host" : "net", dest); 1091 if (*gateway) 1092 printf(": gateway %s", gateway); 1093 1094 if (numfibs > 1) { 1095 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1096 if (fl->fl_error == 0 1097 && fl->fl_num >= 0) { 1098 if (firstfib) { 1099 printf(" fib "); 1100 firstfib = 0; 1101 } 1102 printf("%d", fl->fl_num); 1103 if (fibnum-- > 1) 1104 printf(","); 1105 } 1106 } 1107 } 1108 printf("\n"); 1109 } 1110 } 1111 1112 fibnum = 0; 1113 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1114 if (fl->fl_error != 0) { 1115 error = 1; 1116 if (!qflag) { 1117 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1118 ? "host" : "net", dest); 1119 if (*gateway) 1120 printf(": gateway %s", gateway); 1121 1122 if (fl->fl_num >= 0) 1123 printf(" fib %d", fl->fl_num); 1124 1125 switch (fl->fl_errno) { 1126 case ESRCH: 1127 errmsg = "not in table"; 1128 break; 1129 case EBUSY: 1130 errmsg = "entry in use"; 1131 break; 1132 case ENOBUFS: 1133 errmsg = "not enough memory"; 1134 break; 1135 case EADDRINUSE: 1136 /* 1137 * handle recursion avoidance 1138 * in rt_setgate() 1139 */ 1140 errmsg = "gateway uses the same route"; 1141 break; 1142 case EEXIST: 1143 errmsg = "route already in table"; 1144 break; 1145 default: 1146 errmsg = strerror(fl->fl_errno); 1147 break; 1148 } 1149 printf(": %s\n", errmsg); 1150 } 1151 } 1152 } 1153 exit(error); 1154 } 1155 1156 static int 1157 newroute_fib(int fib, char *cmd, int flags) 1158 { 1159 int error; 1160 1161 error = set_sofib(fib); 1162 if (error) { 1163 warn("fib number %d is ignored", fib); 1164 return (error); 1165 } 1166 1167 error = rtmsg(*cmd, flags, fib); 1168 return (error); 1169 } 1170 1171 #ifdef INET 1172 static void 1173 inet_makemask(struct sockaddr_in *sin_mask, u_long bits) 1174 { 1175 u_long mask = 0; 1176 1177 rtm_addrs |= RTA_NETMASK; 1178 1179 if (bits != 0) 1180 mask = 0xffffffff << (32 - bits); 1181 1182 sin_mask->sin_addr.s_addr = htonl(mask); 1183 sin_mask->sin_len = sizeof(struct sockaddr_in); 1184 sin_mask->sin_family = AF_INET; 1185 } 1186 #endif 1187 1188 #ifdef INET6 1189 /* 1190 * XXX the function may need more improvement... 1191 */ 1192 static int 1193 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1194 { 1195 1196 if (plen == NULL) { 1197 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1198 sin6->sin6_scope_id == 0) 1199 plen = "0"; 1200 } 1201 1202 if (plen == NULL || strcmp(plen, "128") == 0) 1203 return (1); 1204 rtm_addrs |= RTA_NETMASK; 1205 prefixlen(plen); 1206 return (0); 1207 } 1208 #endif 1209 1210 /* 1211 * Interpret an argument as a network address of some kind, 1212 * returning 1 if a host address, 0 if a network address. 1213 */ 1214 static int 1215 getaddr(int idx, char *str, int nrflags) 1216 { 1217 struct sockaddr *sa; 1218 #if defined(INET) 1219 struct sockaddr_in *sin; 1220 struct hostent *hp; 1221 char *q; 1222 #elif defined(INET6) 1223 char *q; 1224 #endif 1225 1226 if (idx < 0 || idx >= RTAX_MAX) 1227 usage("internal error"); 1228 if (af == 0) { 1229 #if defined(INET) 1230 af = AF_INET; 1231 aflen = sizeof(struct sockaddr_in); 1232 #elif defined(INET6) 1233 af = AF_INET6; 1234 aflen = sizeof(struct sockaddr_in6); 1235 #else 1236 af = AF_LINK; 1237 aflen = sizeof(struct sockaddr_dl); 1238 #endif 1239 } 1240 rtm_addrs |= (1 << idx); 1241 sa = (struct sockaddr *)&so[idx]; 1242 sa->sa_family = af; 1243 sa->sa_len = aflen; 1244 1245 switch (idx) { 1246 case RTAX_GATEWAY: 1247 if (nrflags & F_INTERFACE) { 1248 struct ifaddrs *ifap, *ifa; 1249 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1250 struct sockaddr_dl *sdl = NULL; 1251 1252 if (getifaddrs(&ifap)) 1253 err(EX_OSERR, "getifaddrs"); 1254 1255 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1256 if (ifa->ifa_addr->sa_family != AF_LINK) 1257 continue; 1258 1259 if (strcmp(str, ifa->ifa_name) != 0) 1260 continue; 1261 1262 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1263 } 1264 /* If we found it, then use it */ 1265 if (sdl != NULL) { 1266 /* 1267 * Note that we need to copy before calling 1268 * freeifaddrs(). 1269 */ 1270 memcpy(sdl0, sdl, sdl->sdl_len); 1271 } 1272 freeifaddrs(ifap); 1273 if (sdl != NULL) 1274 return(1); 1275 else 1276 errx(EX_DATAERR, 1277 "interface '%s' does not exist", str); 1278 } 1279 break; 1280 case RTAX_IFP: 1281 sa->sa_family = AF_LINK; 1282 break; 1283 } 1284 if (strcmp(str, "default") == 0) { 1285 /* 1286 * Default is net 0.0.0.0/0 1287 */ 1288 switch (idx) { 1289 case RTAX_DST: 1290 nrflags |= F_FORCENET; 1291 getaddr(RTAX_NETMASK, str, nrflags); 1292 break; 1293 } 1294 return (0); 1295 } 1296 switch (sa->sa_family) { 1297 #ifdef INET6 1298 case AF_INET6: 1299 { 1300 struct addrinfo hints, *res; 1301 int ecode; 1302 1303 q = NULL; 1304 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1305 *q = '\0'; 1306 memset(&hints, 0, sizeof(hints)); 1307 hints.ai_family = sa->sa_family; 1308 hints.ai_socktype = SOCK_DGRAM; 1309 ecode = getaddrinfo(str, NULL, &hints, &res); 1310 if (ecode != 0 || res->ai_family != AF_INET6 || 1311 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1312 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1313 memcpy(sa, res->ai_addr, res->ai_addrlen); 1314 freeaddrinfo(res); 1315 if (q != NULL) 1316 *q++ = '/'; 1317 if (idx == RTAX_DST) 1318 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1319 return (0); 1320 } 1321 #endif /* INET6 */ 1322 case AF_LINK: 1323 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1324 return (1); 1325 1326 case PF_ROUTE: 1327 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1328 return (1); 1329 #ifdef INET 1330 case AF_INET: 1331 #endif 1332 default: 1333 break; 1334 } 1335 1336 #ifdef INET 1337 sin = (struct sockaddr_in *)(void *)sa; 1338 1339 q = strchr(str,'/'); 1340 if (q != NULL && idx == RTAX_DST) { 1341 /* A.B.C.D/NUM */ 1342 *q = '\0'; 1343 if (inet_aton(str, &sin->sin_addr) == 0) 1344 errx(EX_NOHOST, "bad address: %s", str); 1345 1346 int masklen = strtol(q + 1, NULL, 10); 1347 if (masklen < 0 || masklen > 32) 1348 errx(EX_NOHOST, "bad mask length: %s", q + 1); 1349 1350 inet_makemask((struct sockaddr_in *)&so[RTAX_NETMASK],masklen); 1351 return (0); 1352 } 1353 if (inet_aton(str, &sin->sin_addr) != 0) 1354 return (1); 1355 1356 hp = gethostbyname(str); 1357 if (hp != NULL) { 1358 sin->sin_family = hp->h_addrtype; 1359 memmove((char *)&sin->sin_addr, hp->h_addr, 1360 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1361 return (1); 1362 } 1363 #endif 1364 errx(EX_NOHOST, "bad address: %s", str); 1365 } 1366 1367 static int 1368 prefixlen(const char *str) 1369 { 1370 int len = atoi(str), q, r; 1371 int max; 1372 char *p; 1373 1374 rtm_addrs |= RTA_NETMASK; 1375 switch (af) { 1376 #ifdef INET6 1377 case AF_INET6: 1378 { 1379 struct sockaddr_in6 *sin6 = 1380 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1381 1382 max = 128; 1383 p = (char *)&sin6->sin6_addr; 1384 sin6->sin6_family = AF_INET6; 1385 sin6->sin6_len = sizeof(*sin6); 1386 break; 1387 } 1388 #endif 1389 #ifdef INET 1390 case AF_INET: 1391 { 1392 struct sockaddr_in *sin = 1393 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1394 1395 max = 32; 1396 p = (char *)&sin->sin_addr; 1397 sin->sin_family = AF_INET; 1398 sin->sin_len = sizeof(*sin); 1399 break; 1400 } 1401 #endif 1402 default: 1403 errx(EX_OSERR, "prefixlen not supported in this af"); 1404 } 1405 1406 if (len < 0 || max < len) 1407 errx(EX_USAGE, "%s: invalid prefixlen", str); 1408 1409 q = len >> 3; 1410 r = len & 7; 1411 memset((void *)p, 0, max / 8); 1412 if (q > 0) 1413 memset((void *)p, 0xff, q); 1414 if (r > 0) 1415 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1416 if (len == max) 1417 return (-1); 1418 else 1419 return (len); 1420 } 1421 1422 static void 1423 interfaces(void) 1424 { 1425 size_t needed; 1426 int mib[6]; 1427 char *buf, *lim, *next, count = 0; 1428 struct rt_msghdr *rtm; 1429 1430 retry2: 1431 mib[0] = CTL_NET; 1432 mib[1] = PF_ROUTE; 1433 mib[2] = 0; /* protocol */ 1434 mib[3] = AF_UNSPEC; 1435 mib[4] = NET_RT_IFLIST; 1436 mib[5] = 0; /* no flags */ 1437 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1438 err(EX_OSERR, "route-sysctl-estimate"); 1439 if ((buf = malloc(needed)) == NULL) 1440 errx(EX_OSERR, "malloc failed"); 1441 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1442 if (errno == ENOMEM && count++ < 10) { 1443 warnx("Routing table grew, retrying"); 1444 sleep(1); 1445 free(buf); 1446 goto retry2; 1447 } 1448 err(EX_OSERR, "actual retrieval of interface table"); 1449 } 1450 lim = buf + needed; 1451 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1452 rtm = (struct rt_msghdr *)(void *)next; 1453 print_rtmsg(rtm, rtm->rtm_msglen); 1454 } 1455 free(buf); 1456 } 1457 1458 static void 1459 monitor(int argc, char *argv[]) 1460 { 1461 int fib, error; 1462 char *endptr; 1463 1464 fib = defaultfib; 1465 while (argc > 1) { 1466 argc--; 1467 argv++; 1468 if (**argv != '-') 1469 usage(*argv); 1470 switch (keyword(*argv + 1)) { 1471 case K_FIB: 1472 if (!--argc) 1473 usage(*argv); 1474 errno = 0; 1475 fib = strtol(*++argv, &endptr, 0); 1476 if (errno == 0) { 1477 if (*endptr != '\0' || 1478 fib < 0 || 1479 (numfibs != -1 && fib > numfibs - 1)) 1480 errno = EINVAL; 1481 } 1482 if (errno) 1483 errx(EX_USAGE, "invalid fib number: %s", *argv); 1484 break; 1485 default: 1486 usage(*argv); 1487 } 1488 } 1489 error = set_sofib(fib); 1490 if (error) 1491 errx(EX_USAGE, "invalid fib number: %d", fib); 1492 1493 verbose = 1; 1494 if (debugonly) { 1495 interfaces(); 1496 exit(0); 1497 } 1498 #ifdef WITHOUT_NETLINK 1499 monitor_rtsock(); 1500 #else 1501 monitor_nl(fib); 1502 #endif 1503 } 1504 1505 #ifdef WITHOUT_NETLINK 1506 static void 1507 monitor_rtsock(void) 1508 { 1509 char msg[2048]; 1510 int n; 1511 1512 #ifdef SO_RERROR 1513 n = 1; 1514 if (setsockopt(s, SOL_SOCKET, SO_RERROR, &n, sizeof(n)) == -1) 1515 warn("SO_RERROR"); 1516 #endif 1517 1518 for (;;) { 1519 time_t now; 1520 n = read(s, msg, sizeof(msg)); 1521 if (n == -1) { 1522 warn("read"); 1523 continue; 1524 } 1525 now = time(NULL); 1526 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1527 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1528 } 1529 } 1530 #endif 1531 1532 static int 1533 rtmsg(int cmd, int flags, int fib) 1534 { 1535 errno = 0; 1536 if (cmd == 'a') 1537 cmd = RTM_ADD; 1538 else if (cmd == 'c') 1539 cmd = RTM_CHANGE; 1540 else if (cmd == 'g' || cmd == 's') { 1541 cmd = RTM_GET; 1542 if (so[RTAX_IFP].ss_family == 0) { 1543 so[RTAX_IFP].ss_family = AF_LINK; 1544 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1545 rtm_addrs |= RTA_IFP; 1546 } 1547 } else { 1548 cmd = RTM_DELETE; 1549 flags |= RTF_PINNED; 1550 } 1551 #ifdef WITHOUT_NETLINK 1552 return (rtmsg_rtsock(cmd, flags, fib)); 1553 #else 1554 errno = rtmsg_nl(cmd, flags, fib, rtm_addrs, so, &rt_metrics); 1555 return (errno == 0 ? 0 : -1); 1556 #endif 1557 } 1558 1559 #ifdef WITHOUT_NETLINK 1560 static int 1561 rtmsg_rtsock(int cmd, int flags, int fib) 1562 { 1563 int rlen; 1564 char *cp = m_rtmsg.m_space; 1565 int l; 1566 1567 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1568 1569 #define NEXTADDR(w, u) \ 1570 if (rtm_addrs & (w)) { \ 1571 l = SA_SIZE(&(u)); \ 1572 memmove(cp, (char *)&(u), l); \ 1573 cp += l; \ 1574 if (verbose) \ 1575 sodump((struct sockaddr *)&(u), #w); \ 1576 } 1577 1578 #define rtm m_rtmsg.m_rtm 1579 rtm.rtm_type = cmd; 1580 rtm.rtm_flags = flags; 1581 rtm.rtm_version = RTM_VERSION; 1582 rtm.rtm_seq = ++rtm_seq; 1583 rtm.rtm_addrs = rtm_addrs; 1584 rtm.rtm_rmx = rt_metrics; 1585 rtm.rtm_inits = rtm_inits; 1586 1587 NEXTADDR(RTA_DST, so[RTAX_DST]); 1588 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1589 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1590 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1591 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1592 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1593 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1594 if (verbose) 1595 print_rtmsg(&rtm, l); 1596 if (debugonly) 1597 return (0); 1598 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1599 switch (errno) { 1600 case EPERM: 1601 err(1, "writing to routing socket"); 1602 break; 1603 case ESRCH: 1604 warnx("route has not been found"); 1605 break; 1606 case EEXIST: 1607 /* Handled by newroute() */ 1608 break; 1609 default: 1610 warn("writing to routing socket"); 1611 } 1612 return (-1); 1613 } 1614 if (cmd == RTM_GET) { 1615 stop_read = 0; 1616 alarm(READ_TIMEOUT); 1617 do { 1618 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1619 } while (l > 0 && stop_read == 0 && 1620 (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq || 1621 rtm.rtm_pid != pid)); 1622 if (stop_read != 0) { 1623 warnx("read from routing socket timed out"); 1624 return (-1); 1625 } else 1626 alarm(0); 1627 if (l < 0) 1628 warn("read from routing socket"); 1629 else 1630 print_getmsg(&rtm, l, fib); 1631 } 1632 #undef rtm 1633 return (0); 1634 } 1635 #endif 1636 1637 static const char *const msgtypes[] = { 1638 "", 1639 "RTM_ADD: Add Route", 1640 "RTM_DELETE: Delete Route", 1641 "RTM_CHANGE: Change Metrics or flags", 1642 "RTM_GET: Report Metrics", 1643 "RTM_LOSING: Kernel Suspects Partitioning", 1644 "RTM_REDIRECT: Told to use different route", 1645 "RTM_MISS: Lookup failed on this address", 1646 "RTM_LOCK: fix specified metrics", 1647 "RTM_OLDADD: caused by SIOCADDRT", 1648 "RTM_OLDDEL: caused by SIOCDELRT", 1649 "RTM_RESOLVE: Route created by cloning", 1650 "RTM_NEWADDR: address being added to iface", 1651 "RTM_DELADDR: address being removed from iface", 1652 "RTM_IFINFO: iface status change", 1653 "RTM_NEWMADDR: new multicast group membership on iface", 1654 "RTM_DELMADDR: multicast group membership removed from iface", 1655 "RTM_IFANNOUNCE: interface arrival/departure", 1656 "RTM_IEEE80211: IEEE 802.11 wireless event", 1657 }; 1658 1659 static const char metricnames[] = 1660 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1661 "\1mtu"; 1662 const char routeflags[] = 1663 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1664 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1665 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1666 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1667 static const char ifnetflags[] = 1668 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1669 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1670 "\017LINK2\020MULTICAST"; 1671 static const char addrnames[] = 1672 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1673 1674 static const char errfmt[] = 1675 "\n%s: truncated route message, only %zu bytes left\n"; 1676 1677 static void 1678 print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1679 { 1680 struct if_msghdr *ifm; 1681 struct ifa_msghdr *ifam; 1682 #ifdef RTM_NEWMADDR 1683 struct ifma_msghdr *ifmam; 1684 #endif 1685 struct if_announcemsghdr *ifan; 1686 const char *state; 1687 1688 if (verbose == 0) 1689 return; 1690 if (rtm->rtm_version != RTM_VERSION) { 1691 (void)printf("routing message version %d not understood\n", 1692 rtm->rtm_version); 1693 return; 1694 } 1695 if (rtm->rtm_type < nitems(msgtypes)) 1696 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1697 else 1698 (void)printf("unknown type %d: ", rtm->rtm_type); 1699 (void)printf("len %d, ", rtm->rtm_msglen); 1700 1701 #define REQUIRE(x) do { \ 1702 if (msglen < sizeof(x)) \ 1703 goto badlen; \ 1704 else \ 1705 msglen -= sizeof(x); \ 1706 } while (0) 1707 1708 switch (rtm->rtm_type) { 1709 case RTM_IFINFO: 1710 REQUIRE(struct if_msghdr); 1711 ifm = (struct if_msghdr *)rtm; 1712 (void)printf("if# %d, ", ifm->ifm_index); 1713 switch (ifm->ifm_data.ifi_link_state) { 1714 case LINK_STATE_DOWN: 1715 state = "down"; 1716 break; 1717 case LINK_STATE_UP: 1718 state = "up"; 1719 break; 1720 default: 1721 state = "unknown"; 1722 break; 1723 } 1724 (void)printf("link: %s, flags:", state); 1725 printb(ifm->ifm_flags, ifnetflags); 1726 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1727 break; 1728 case RTM_NEWADDR: 1729 case RTM_DELADDR: 1730 REQUIRE(struct ifa_msghdr); 1731 ifam = (struct ifa_msghdr *)rtm; 1732 (void)printf("metric %d, flags:", ifam->ifam_metric); 1733 printb(ifam->ifam_flags, routeflags); 1734 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1735 break; 1736 #ifdef RTM_NEWMADDR 1737 case RTM_NEWMADDR: 1738 case RTM_DELMADDR: 1739 REQUIRE(struct ifma_msghdr); 1740 ifmam = (struct ifma_msghdr *)rtm; 1741 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1742 break; 1743 #endif 1744 case RTM_IFANNOUNCE: 1745 REQUIRE(struct if_announcemsghdr); 1746 ifan = (struct if_announcemsghdr *)rtm; 1747 (void)printf("if# %d, what: ", ifan->ifan_index); 1748 switch (ifan->ifan_what) { 1749 case IFAN_ARRIVAL: 1750 (void)printf("arrival"); 1751 break; 1752 case IFAN_DEPARTURE: 1753 printf("departure"); 1754 break; 1755 default: 1756 printf("#%d", ifan->ifan_what); 1757 break; 1758 } 1759 printf("\n"); 1760 fflush(stdout); 1761 break; 1762 1763 default: 1764 if (rtm->rtm_type <= RTM_RESOLVE) { 1765 printf("pid: %ld, seq %d, errno %d, flags:", 1766 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1767 printb(rtm->rtm_flags, routeflags); 1768 pmsg_common(rtm, msglen); 1769 } else 1770 printf("type: %u, len: %zu\n", rtm->rtm_type, msglen); 1771 } 1772 1773 return; 1774 1775 badlen: 1776 (void)printf(errfmt, __func__, msglen); 1777 #undef REQUIRE 1778 } 1779 1780 static void 1781 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1782 { 1783 struct sockaddr *sp[RTAX_MAX]; 1784 struct timespec ts; 1785 char *cp; 1786 int i; 1787 1788 memset(sp, 0, sizeof(sp)); 1789 (void)printf(" route to: %s\n", 1790 routename((struct sockaddr *)&so[RTAX_DST])); 1791 if (rtm->rtm_version != RTM_VERSION) { 1792 warnx("routing message version %d not understood", 1793 rtm->rtm_version); 1794 return; 1795 } 1796 if (rtm->rtm_msglen > msglen) { 1797 warnx("message length mismatch, in packet %d, returned %d", 1798 rtm->rtm_msglen, msglen); 1799 return; 1800 } 1801 if (rtm->rtm_errno) { 1802 errno = rtm->rtm_errno; 1803 warn("message indicates error %d", errno); 1804 return; 1805 } 1806 cp = ((char *)(rtm + 1)); 1807 for (i = 0; i < RTAX_MAX; i++) 1808 if (rtm->rtm_addrs & (1 << i)) { 1809 sp[i] = (struct sockaddr *)cp; 1810 cp += SA_SIZE((struct sockaddr *)cp); 1811 } 1812 if ((rtm->rtm_addrs & RTA_IFP) && 1813 (sp[RTAX_IFP]->sa_family != AF_LINK || 1814 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1815 sp[RTAX_IFP] = NULL; 1816 if (sp[RTAX_DST]) 1817 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1818 if (sp[RTAX_NETMASK]) 1819 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1820 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1821 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1822 if (fib >= 0) 1823 (void)printf(" fib: %u\n", (unsigned int)fib); 1824 if (sp[RTAX_IFP]) 1825 (void)printf(" interface: %.*s\n", 1826 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1827 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1828 (void)printf(" flags: "); 1829 printb(rtm->rtm_flags, routeflags); 1830 1831 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1832 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1833 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1834 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1835 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1836 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1837 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1838 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1839 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1840 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1841 if (rtm->rtm_rmx.rmx_expire > 0) 1842 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1843 else 1844 ts.tv_sec = 0; 1845 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1846 lock(EXPIRE)); 1847 #undef lock 1848 #undef msec 1849 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1850 if (verbose) 1851 pmsg_common(rtm, msglen); 1852 else if (rtm->rtm_addrs &~ RTA_IGN) { 1853 (void)printf("sockaddrs: "); 1854 printb(rtm->rtm_addrs, addrnames); 1855 putchar('\n'); 1856 } 1857 #undef RTA_IGN 1858 } 1859 1860 static void 1861 pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1862 { 1863 1864 (void)printf("\nlocks: "); 1865 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1866 (void)printf(" inits: "); 1867 printb(rtm->rtm_inits, metricnames); 1868 if (msglen > sizeof(struct rt_msghdr)) 1869 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1870 msglen - sizeof(struct rt_msghdr)); 1871 else 1872 (void)fflush(stdout); 1873 } 1874 1875 static void 1876 pmsg_addrs(char *cp, int addrs, size_t len) 1877 { 1878 struct sockaddr *sa; 1879 int i; 1880 1881 if (addrs == 0) { 1882 (void)putchar('\n'); 1883 return; 1884 } 1885 (void)printf("\nsockaddrs: "); 1886 printb(addrs, addrnames); 1887 putchar('\n'); 1888 for (i = 0; i < RTAX_MAX; i++) 1889 if (addrs & (1 << i)) { 1890 sa = (struct sockaddr *)cp; 1891 if (len == 0 || len < SA_SIZE(sa)) { 1892 (void)printf(errfmt, __func__, len); 1893 break; 1894 } 1895 (void)printf(" %s", routename(sa)); 1896 len -= SA_SIZE(sa); 1897 cp += SA_SIZE(sa); 1898 } 1899 (void)putchar('\n'); 1900 (void)fflush(stdout); 1901 } 1902 1903 void 1904 printb(int b, const char *str) 1905 { 1906 int i; 1907 int gotsome = 0; 1908 1909 if (b == 0) 1910 return; 1911 while ((i = *str++) != 0) { 1912 if (b & (1 << (i-1))) { 1913 if (gotsome == 0) 1914 i = '<'; 1915 else 1916 i = ','; 1917 putchar(i); 1918 gotsome = 1; 1919 for (; (i = *str) > 32; str++) 1920 putchar(i); 1921 } else 1922 while (*str > 32) 1923 str++; 1924 } 1925 if (gotsome) 1926 putchar('>'); 1927 } 1928 1929 int 1930 keyword(const char *cp) 1931 { 1932 const struct keytab *kt = keywords; 1933 1934 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1935 kt++; 1936 return (kt->kt_i); 1937 } 1938 1939 static void 1940 sodump(struct sockaddr *sa, const char *which) 1941 { 1942 #ifdef INET6 1943 char nbuf[INET6_ADDRSTRLEN]; 1944 #endif 1945 1946 switch (sa->sa_family) { 1947 case AF_LINK: 1948 (void)printf("%s: link %s; ", which, 1949 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1950 break; 1951 #ifdef INET 1952 case AF_INET: 1953 (void)printf("%s: inet %s; ", which, 1954 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1955 break; 1956 #endif 1957 #ifdef INET6 1958 case AF_INET6: 1959 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1960 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1961 sizeof(nbuf))); 1962 break; 1963 #endif 1964 } 1965 (void)fflush(stdout); 1966 } 1967 1968 /* States*/ 1969 #define VIRGIN 0 1970 #define GOTONE 1 1971 #define GOTTWO 2 1972 /* Inputs */ 1973 #define DIGIT (4*0) 1974 #define END (4*1) 1975 #define DELIM (4*2) 1976 1977 static void 1978 sockaddr(char *addr, struct sockaddr *sa, size_t size) 1979 { 1980 char *cp = (char *)sa; 1981 char *cplim = cp + size; 1982 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1983 1984 memset(cp, 0, size); 1985 cp++; 1986 do { 1987 if ((*addr >= '0') && (*addr <= '9')) { 1988 new = *addr - '0'; 1989 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1990 new = *addr - 'a' + 10; 1991 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1992 new = *addr - 'A' + 10; 1993 } else if (*addr == '\0') 1994 state |= END; 1995 else 1996 state |= DELIM; 1997 addr++; 1998 switch (state /* | INPUT */) { 1999 case GOTTWO | DIGIT: 2000 *cp++ = byte; /*FALLTHROUGH*/ 2001 case VIRGIN | DIGIT: 2002 state = GOTONE; byte = new; continue; 2003 case GOTONE | DIGIT: 2004 state = GOTTWO; byte = new + (byte << 4); continue; 2005 default: /* | DELIM */ 2006 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2007 case GOTONE | END: 2008 case GOTTWO | END: 2009 *cp++ = byte; /* FALLTHROUGH */ 2010 case VIRGIN | END: 2011 break; 2012 } 2013 break; 2014 } while (cp < cplim); 2015 sa->sa_len = cp - (char *)sa; 2016 } 2017