1/* 2 * Copyright (c) 1983, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char copyright[] = 32"@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#ifndef lint 37#if 0 38static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 39#endif 40#endif /* not lint */ 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD: stable/11/sbin/route/route.c 340943 2018-11-26 11:08:38Z eugen $"); 44 45#include <sys/param.h> 46#include <sys/file.h> 47#include <sys/socket.h> 48#include <sys/ioctl.h> 49#include <sys/sysctl.h> 50#include <sys/types.h> 51#include <sys/queue.h> 52 53#include <net/if.h> 54#include <net/route.h> 55#include <net/if_dl.h> 56#include <netinet/in.h> 57#include <netinet/if_ether.h> 58#include <arpa/inet.h> 59#include <netdb.h> 60 61#include <ctype.h> 62#include <err.h> 63#include <errno.h> 64#include <paths.h> 65#include <signal.h> 66#include <stdbool.h> 67#include <stdio.h> 68#include <stdlib.h> 69#include <string.h> 70#include <sysexits.h> 71#include <time.h> 72#include <unistd.h> 73#include <ifaddrs.h> 74 75struct fibl { 76 TAILQ_ENTRY(fibl) fl_next; 77 78 int fl_num; 79 int fl_error; 80 int fl_errno; 81}; 82 83static struct keytab { 84 const char *kt_cp; 85 int kt_i; 86} const keywords[] = { 87#include "keywords.h" 88 {0, 0} 89}; 90 91static struct sockaddr_storage so[RTAX_MAX]; 92static int pid, rtm_addrs; 93static int s; 94static int nflag, af, qflag, tflag; 95static int verbose, aflen; 96static int locking, lockrest, debugonly; 97static struct rt_metrics rt_metrics; 98static u_long rtm_inits; 99static uid_t uid; 100static int defaultfib; 101static int numfibs; 102static char domain[MAXHOSTNAMELEN + 1]; 103static bool domain_initialized; 104static int rtm_seq; 105static char rt_line[NI_MAXHOST]; 106static char net_line[MAXHOSTNAMELEN + 1]; 107 108static struct { 109 struct rt_msghdr m_rtm; 110 char m_space[512]; 111} m_rtmsg; 112 113static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 114 115static void printb(int, const char *); 116static void flushroutes(int argc, char *argv[]); 117static int flushroutes_fib(int); 118static int getaddr(int, char *, struct hostent **, int); 119static int keyword(const char *); 120#ifdef INET 121static void inet_makenetandmask(u_long, struct sockaddr_in *, 122 struct sockaddr_in *, u_long); 123#endif 124#ifdef INET6 125static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 126#endif 127static void interfaces(void); 128static void monitor(int, char*[]); 129static const char *netname(struct sockaddr *); 130static void newroute(int, char **); 131static int newroute_fib(int, char *, int); 132static void pmsg_addrs(char *, int, size_t); 133static void pmsg_common(struct rt_msghdr *, size_t); 134static int prefixlen(const char *); 135static void print_getmsg(struct rt_msghdr *, int, int); 136static void print_rtmsg(struct rt_msghdr *, size_t); 137static const char *routename(struct sockaddr *); 138static int rtmsg(int, int, int); 139static void set_metric(char *, int); 140static int set_sofib(int); 141static void sockaddr(char *, struct sockaddr *, size_t); 142static void sodump(struct sockaddr *, const char *); 143static int fiboptlist_csv(const char *, struct fibl_head_t *); 144static int fiboptlist_range(const char *, struct fibl_head_t *); 145 146static void usage(const char *) __dead2; 147 148#define READ_TIMEOUT 10 149static volatile sig_atomic_t stop_read; 150 151static void 152stopit(int sig __unused) 153{ 154 155 stop_read = 1; 156} 157 158static void 159usage(const char *cp) 160{ 161 if (cp != NULL) 162 warnx("bad keyword: %s", cp); 163 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); 164 /* NOTREACHED */ 165} 166 167int 168main(int argc, char **argv) 169{ 170 int ch; 171 size_t len; 172 173 if (argc < 2) 174 usage(NULL); 175 176 while ((ch = getopt(argc, argv, "46nqdtv")) != -1) 177 switch(ch) { 178 case '4': 179#ifdef INET 180 af = AF_INET; 181 aflen = sizeof(struct sockaddr_in); 182#else 183 errx(1, "IPv4 support is not compiled in"); 184#endif 185 break; 186 case '6': 187#ifdef INET6 188 af = AF_INET6; 189 aflen = sizeof(struct sockaddr_in6); 190#else 191 errx(1, "IPv6 support is not compiled in"); 192#endif 193 break; 194 case 'n': 195 nflag = 1; 196 break; 197 case 'q': 198 qflag = 1; 199 break; 200 case 'v': 201 verbose = 1; 202 break; 203 case 't': 204 tflag = 1; 205 break; 206 case 'd': 207 debugonly = 1; 208 break; 209 case '?': 210 default: 211 usage(NULL); 212 } 213 argc -= optind; 214 argv += optind; 215 216 pid = getpid(); 217 uid = geteuid(); 218 if (tflag) 219 s = open(_PATH_DEVNULL, O_WRONLY, 0); 220 else 221 s = socket(PF_ROUTE, SOCK_RAW, 0); 222 if (s < 0) 223 err(EX_OSERR, "socket"); 224 225 len = sizeof(numfibs); 226 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 227 numfibs = -1; 228 229 len = sizeof(defaultfib); 230 if (numfibs != -1 && 231 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 232 0) == -1) 233 defaultfib = -1; 234 235 if (*argv != NULL) 236 switch (keyword(*argv)) { 237 case K_GET: 238 case K_SHOW: 239 uid = 0; 240 /* FALLTHROUGH */ 241 242 case K_CHANGE: 243 case K_ADD: 244 case K_DEL: 245 case K_DELETE: 246 newroute(argc, argv); 247 /* NOTREACHED */ 248 249 case K_MONITOR: 250 monitor(argc, argv); 251 /* NOTREACHED */ 252 253 case K_FLUSH: 254 flushroutes(argc, argv); 255 exit(0); 256 /* NOTREACHED */ 257 } 258 usage(*argv); 259 /* NOTREACHED */ 260} 261 262static int 263set_sofib(int fib) 264{ 265 266 if (fib < 0) 267 return (0); 268 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 269 sizeof(fib))); 270} 271 272static int 273fiboptlist_range(const char *arg, struct fibl_head_t *flh) 274{ 275 struct fibl *fl; 276 char *str0, *str, *token, *endptr; 277 int fib[2], i, error; 278 279 str0 = str = strdup(arg); 280 error = 0; 281 i = 0; 282 while ((token = strsep(&str, "-")) != NULL) { 283 switch (i) { 284 case 0: 285 case 1: 286 errno = 0; 287 fib[i] = strtol(token, &endptr, 0); 288 if (errno == 0) { 289 if (*endptr != '\0' || 290 fib[i] < 0 || 291 (numfibs != -1 && fib[i] > numfibs - 1)) 292 errno = EINVAL; 293 } 294 if (errno) 295 error = 1; 296 break; 297 default: 298 error = 1; 299 } 300 if (error) 301 goto fiboptlist_range_ret; 302 i++; 303 } 304 if (fib[0] >= fib[1]) { 305 error = 1; 306 goto fiboptlist_range_ret; 307 } 308 for (i = fib[0]; i <= fib[1]; i++) { 309 fl = calloc(1, sizeof(*fl)); 310 if (fl == NULL) { 311 error = 1; 312 goto fiboptlist_range_ret; 313 } 314 fl->fl_num = i; 315 TAILQ_INSERT_TAIL(flh, fl, fl_next); 316 } 317fiboptlist_range_ret: 318 free(str0); 319 return (error); 320} 321 322#define ALLSTRLEN 64 323static int 324fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 325{ 326 struct fibl *fl; 327 char *str0, *str, *token, *endptr; 328 int fib, error; 329 330 str0 = str = NULL; 331 if (strcmp("all", arg) == 0) { 332 str = calloc(1, ALLSTRLEN); 333 if (str == NULL) { 334 error = 1; 335 goto fiboptlist_csv_ret; 336 } 337 if (numfibs > 1) 338 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 339 else 340 snprintf(str, ALLSTRLEN - 1, "%d", 0); 341 } else if (strcmp("default", arg) == 0) { 342 str0 = str = calloc(1, ALLSTRLEN); 343 if (str == NULL) { 344 error = 1; 345 goto fiboptlist_csv_ret; 346 } 347 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 348 } else 349 str0 = str = strdup(arg); 350 351 error = 0; 352 while ((token = strsep(&str, ",")) != NULL) { 353 if (*token != '-' && strchr(token, '-') != NULL) { 354 error = fiboptlist_range(token, flh); 355 if (error) 356 goto fiboptlist_csv_ret; 357 } else { 358 errno = 0; 359 fib = strtol(token, &endptr, 0); 360 if (errno == 0) { 361 if (*endptr != '\0' || 362 fib < 0 || 363 (numfibs != -1 && fib > numfibs - 1)) 364 errno = EINVAL; 365 } 366 if (errno) { 367 error = 1; 368 goto fiboptlist_csv_ret; 369 } 370 fl = calloc(1, sizeof(*fl)); 371 if (fl == NULL) { 372 error = 1; 373 goto fiboptlist_csv_ret; 374 } 375 fl->fl_num = fib; 376 TAILQ_INSERT_TAIL(flh, fl, fl_next); 377 } 378 } 379fiboptlist_csv_ret: 380 if (str0 != NULL) 381 free(str0); 382 return (error); 383} 384 385/* 386 * Purge all entries in the routing tables not 387 * associated with network interfaces. 388 */ 389static void 390flushroutes(int argc, char *argv[]) 391{ 392 struct fibl *fl; 393 int error; 394 395 if (uid != 0 && !debugonly && !tflag) 396 errx(EX_NOPERM, "must be root to alter routing table"); 397 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 398 399 TAILQ_INIT(&fibl_head); 400 while (argc > 1) { 401 argc--; 402 argv++; 403 if (**argv != '-') 404 usage(*argv); 405 switch (keyword(*argv + 1)) { 406#ifdef INET 407 case K_4: 408 case K_INET: 409 af = AF_INET; 410 break; 411#endif 412#ifdef INET6 413 case K_6: 414 case K_INET6: 415 af = AF_INET6; 416 break; 417#endif 418 case K_LINK: 419 af = AF_LINK; 420 break; 421 case K_FIB: 422 if (!--argc) 423 usage(*argv); 424 error = fiboptlist_csv(*++argv, &fibl_head); 425 if (error) 426 errx(EX_USAGE, "invalid fib number: %s", *argv); 427 break; 428 default: 429 usage(*argv); 430 } 431 } 432 if (TAILQ_EMPTY(&fibl_head)) { 433 error = fiboptlist_csv("default", &fibl_head); 434 if (error) 435 errx(EX_OSERR, "fiboptlist_csv failed."); 436 } 437 TAILQ_FOREACH(fl, &fibl_head, fl_next) 438 flushroutes_fib(fl->fl_num); 439} 440 441static int 442flushroutes_fib(int fib) 443{ 444 struct rt_msghdr *rtm; 445 size_t needed; 446 char *buf, *next, *lim; 447 int mib[7], rlen, seqno, count = 0; 448 int error; 449 450 error = set_sofib(fib); 451 if (error) { 452 warn("fib number %d is ignored", fib); 453 return (error); 454 } 455 456retry: 457 mib[0] = CTL_NET; 458 mib[1] = PF_ROUTE; 459 mib[2] = 0; /* protocol */ 460 mib[3] = AF_UNSPEC; 461 mib[4] = NET_RT_DUMP; 462 mib[5] = 0; /* no flags */ 463 mib[6] = fib; 464 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 465 err(EX_OSERR, "route-sysctl-estimate"); 466 if ((buf = malloc(needed)) == NULL) 467 errx(EX_OSERR, "malloc failed"); 468 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 469 if (errno == ENOMEM && count++ < 10) { 470 warnx("Routing table grew, retrying"); 471 sleep(1); 472 free(buf); 473 goto retry; 474 } 475 err(EX_OSERR, "route-sysctl-get"); 476 } 477 lim = buf + needed; 478 if (verbose) 479 (void)printf("Examining routing table from sysctl\n"); 480 seqno = 0; /* ??? */ 481 for (next = buf; next < lim; next += rtm->rtm_msglen) { 482 rtm = (struct rt_msghdr *)(void *)next; 483 if (verbose) 484 print_rtmsg(rtm, rtm->rtm_msglen); 485 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 486 continue; 487 if (af != 0) { 488 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 489 490 if (sa->sa_family != af) 491 continue; 492 } 493 if (debugonly) 494 continue; 495 rtm->rtm_type = RTM_DELETE; 496 rtm->rtm_seq = seqno; 497 rlen = write(s, next, rtm->rtm_msglen); 498 if (rlen < 0 && errno == EPERM) 499 err(1, "write to routing socket"); 500 if (rlen < (int)rtm->rtm_msglen) { 501 warn("write to routing socket"); 502 (void)printf("got only %d for rlen\n", rlen); 503 free(buf); 504 goto retry; 505 break; 506 } 507 seqno++; 508 if (qflag) 509 continue; 510 if (verbose) 511 print_rtmsg(rtm, rlen); 512 else { 513 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 514 515 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 516 routename(sa) : netname(sa)); 517 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 518 printf("%-20.20s ", routename(sa)); 519 if (fib >= 0) 520 printf("-fib %-3d ", fib); 521 printf("done\n"); 522 } 523 } 524 return (error); 525} 526 527static const char * 528routename(struct sockaddr *sa) 529{ 530 struct sockaddr_dl *sdl; 531 const char *cp; 532 int n; 533 534 if (!domain_initialized) { 535 domain_initialized = true; 536 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 537 (cp = strchr(domain, '.'))) { 538 domain[MAXHOSTNAMELEN] = '\0'; 539 (void)strcpy(domain, cp + 1); 540 } else 541 domain[0] = '\0'; 542 } 543 544 /* If the address is zero-filled, use "default". */ 545 if (sa->sa_len == 0 && nflag == 0) 546 return ("default"); 547#if defined(INET) || defined(INET6) 548 switch (sa->sa_family) { 549#ifdef INET 550 case AF_INET: 551 /* If the address is zero-filled, use "default". */ 552 if (nflag == 0 && 553 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 554 INADDR_ANY) 555 return("default"); 556 break; 557#endif 558#ifdef INET6 559 case AF_INET6: 560 /* If the address is zero-filled, use "default". */ 561 if (nflag == 0 && 562 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 563 return("default"); 564 break; 565#endif 566 } 567#endif 568 569 switch (sa->sa_family) { 570#if defined(INET) || defined(INET6) 571#ifdef INET 572 case AF_INET: 573#endif 574#ifdef INET6 575 case AF_INET6: 576#endif 577 { 578 struct sockaddr_storage ss; 579 int error; 580 char *p; 581 582 memset(&ss, 0, sizeof(ss)); 583 if (sa->sa_len == 0) 584 ss.ss_family = sa->sa_family; 585 else 586 memcpy(&ss, sa, sa->sa_len); 587 /* Expand sa->sa_len because it could be shortened. */ 588 if (sa->sa_family == AF_INET) 589 ss.ss_len = sizeof(struct sockaddr_in); 590 else if (sa->sa_family == AF_INET6) 591 ss.ss_len = sizeof(struct sockaddr_in6); 592 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 593 rt_line, sizeof(rt_line), NULL, 0, 594 (nflag == 0) ? 0 : NI_NUMERICHOST); 595 if (error) { 596 warnx("getnameinfo(): %s", gai_strerror(error)); 597 strncpy(rt_line, "invalid", sizeof(rt_line)); 598 } 599 600 /* Remove the domain part if any. */ 601 p = strchr(rt_line, '.'); 602 if (p != NULL && strcmp(p + 1, domain) == 0) 603 *p = '\0'; 604 605 return (rt_line); 606 break; 607 } 608#endif 609 case AF_LINK: 610 sdl = (struct sockaddr_dl *)(void *)sa; 611 612 if (sdl->sdl_nlen == 0 && 613 sdl->sdl_alen == 0 && 614 sdl->sdl_slen == 0) { 615 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 616 sdl->sdl_index); 617 if (n > (int)sizeof(rt_line)) 618 rt_line[0] = '\0'; 619 return (rt_line); 620 } else 621 return (link_ntoa(sdl)); 622 break; 623 624 default: 625 { 626 u_short *sp = (u_short *)(void *)sa; 627 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 628 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 629 char *cpe = rt_line + sizeof(rt_line); 630 631 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 632 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 633 cps += n; 634 else 635 *cps = '\0'; 636 break; 637 } 638 } 639 return (rt_line); 640} 641 642/* 643 * Return the name of the network whose address is given. 644 * The address is assumed to be that of a net, not a host. 645 */ 646static const char * 647netname(struct sockaddr *sa) 648{ 649 struct sockaddr_dl *sdl; 650 int n; 651#ifdef INET 652 struct netent *np = NULL; 653 const char *cp = NULL; 654 u_long i; 655#endif 656 657 switch (sa->sa_family) { 658#ifdef INET 659 case AF_INET: 660 { 661 struct in_addr in; 662 663 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 664 i = in.s_addr = ntohl(in.s_addr); 665 if (in.s_addr == 0) 666 cp = "default"; 667 else if (!nflag) { 668 np = getnetbyaddr(i, AF_INET); 669 if (np != NULL) 670 cp = np->n_name; 671 } 672#define C(x) (unsigned)((x) & 0xff) 673 if (cp != NULL) 674 strncpy(net_line, cp, sizeof(net_line)); 675 else if ((in.s_addr & 0xffffff) == 0) 676 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 677 else if ((in.s_addr & 0xffff) == 0) 678 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 679 C(in.s_addr >> 16)); 680 else if ((in.s_addr & 0xff) == 0) 681 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 682 C(in.s_addr >> 16), C(in.s_addr >> 8)); 683 else 684 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 685 C(in.s_addr >> 16), C(in.s_addr >> 8), 686 C(in.s_addr)); 687#undef C 688 break; 689 } 690#endif 691#ifdef INET6 692 case AF_INET6: 693 { 694 struct sockaddr_in6 sin6; 695 int niflags = 0; 696 697 memset(&sin6, 0, sizeof(sin6)); 698 memcpy(&sin6, sa, sa->sa_len); 699 sin6.sin6_len = sizeof(sin6); 700 sin6.sin6_family = AF_INET6; 701 if (nflag) 702 niflags |= NI_NUMERICHOST; 703 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 704 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 705 strncpy(net_line, "invalid", sizeof(net_line)); 706 707 return(net_line); 708 } 709#endif 710 case AF_LINK: 711 sdl = (struct sockaddr_dl *)(void *)sa; 712 713 if (sdl->sdl_nlen == 0 && 714 sdl->sdl_alen == 0 && 715 sdl->sdl_slen == 0) { 716 n = snprintf(net_line, sizeof(net_line), "link#%d", 717 sdl->sdl_index); 718 if (n > (int)sizeof(net_line)) 719 net_line[0] = '\0'; 720 return (net_line); 721 } else 722 return (link_ntoa(sdl)); 723 break; 724 725 default: 726 { 727 u_short *sp = (u_short *)(void *)sa->sa_data; 728 u_short *splim = sp + ((sa->sa_len + 1)>>1); 729 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 730 char *cpe = net_line + sizeof(net_line); 731 732 while (sp < splim && cps < cpe) 733 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 734 cps += n; 735 else 736 *cps = '\0'; 737 break; 738 } 739 } 740 return (net_line); 741} 742 743static void 744set_metric(char *value, int key) 745{ 746 int flag = 0; 747 char *endptr; 748 u_long noval, *valp = &noval; 749 750 switch (key) { 751#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 752 caseof(K_MTU, RTV_MTU, rmx_mtu); 753 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 754 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 755 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 756 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 757 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 758 caseof(K_RTT, RTV_RTT, rmx_rtt); 759 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 760 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 761 } 762 rtm_inits |= flag; 763 if (lockrest || locking) 764 rt_metrics.rmx_locks |= flag; 765 if (locking) 766 locking = 0; 767 errno = 0; 768 *valp = strtol(value, &endptr, 0); 769 if (errno == 0 && *endptr != '\0') 770 errno = EINVAL; 771 if (errno) 772 err(EX_USAGE, "%s", value); 773 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 774 struct timespec ts; 775 776 clock_gettime(CLOCK_REALTIME_FAST, &ts); 777 *valp += ts.tv_sec; 778 } 779} 780 781#define F_ISHOST 0x01 782#define F_FORCENET 0x02 783#define F_FORCEHOST 0x04 784#define F_PROXY 0x08 785#define F_INTERFACE 0x10 786 787static void 788newroute(int argc, char **argv) 789{ 790 struct sigaction sa; 791 struct hostent *hp; 792 struct fibl *fl; 793 char *cmd; 794 const char *dest, *gateway, *errmsg; 795 int key, error, flags, nrflags, fibnum; 796 797 if (uid != 0 && !debugonly && !tflag) 798 errx(EX_NOPERM, "must be root to alter routing table"); 799 dest = NULL; 800 gateway = NULL; 801 flags = RTF_STATIC; 802 nrflags = 0; 803 hp = NULL; 804 TAILQ_INIT(&fibl_head); 805 806 sigemptyset(&sa.sa_mask); 807 sa.sa_flags = 0; 808 sa.sa_handler = stopit; 809 if (sigaction(SIGALRM, &sa, 0) == -1) 810 warn("sigaction SIGALRM"); 811 812 cmd = argv[0]; 813 if (*cmd != 'g' && *cmd != 's') 814 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 815 while (--argc > 0) { 816 if (**(++argv)== '-') { 817 switch (key = keyword(1 + *argv)) { 818 case K_LINK: 819 af = AF_LINK; 820 aflen = sizeof(struct sockaddr_dl); 821 break; 822#ifdef INET 823 case K_4: 824 case K_INET: 825 af = AF_INET; 826 aflen = sizeof(struct sockaddr_in); 827 break; 828#endif 829#ifdef INET6 830 case K_6: 831 case K_INET6: 832 af = AF_INET6; 833 aflen = sizeof(struct sockaddr_in6); 834 break; 835#endif 836 case K_SA: 837 af = PF_ROUTE; 838 aflen = sizeof(struct sockaddr_storage); 839 break; 840 case K_IFACE: 841 case K_INTERFACE: 842 nrflags |= F_INTERFACE; 843 break; 844 case K_NOSTATIC: 845 flags &= ~RTF_STATIC; 846 break; 847 case K_LOCK: 848 locking = 1; 849 break; 850 case K_LOCKREST: 851 lockrest = 1; 852 break; 853 case K_HOST: 854 nrflags |= F_FORCEHOST; 855 break; 856 case K_REJECT: 857 flags |= RTF_REJECT; 858 break; 859 case K_BLACKHOLE: 860 flags |= RTF_BLACKHOLE; 861 break; 862 case K_PROTO1: 863 flags |= RTF_PROTO1; 864 break; 865 case K_PROTO2: 866 flags |= RTF_PROTO2; 867 break; 868 case K_PROXY: 869 nrflags |= F_PROXY; 870 break; 871 case K_XRESOLVE: 872 flags |= RTF_XRESOLVE; 873 break; 874 case K_STATIC: 875 flags |= RTF_STATIC; 876 break; 877 case K_STICKY: 878 flags |= RTF_STICKY; 879 break; 880 case K_NOSTICK: 881 flags &= ~RTF_STICKY; 882 break; 883 case K_FIB: 884 if (!--argc) 885 usage(NULL); 886 error = fiboptlist_csv(*++argv, &fibl_head); 887 if (error) 888 errx(EX_USAGE, 889 "invalid fib number: %s", *argv); 890 break; 891 case K_IFA: 892 if (!--argc) 893 usage(NULL); 894 getaddr(RTAX_IFA, *++argv, 0, nrflags); 895 break; 896 case K_IFP: 897 if (!--argc) 898 usage(NULL); 899 getaddr(RTAX_IFP, *++argv, 0, nrflags); 900 break; 901 case K_GENMASK: 902 if (!--argc) 903 usage(NULL); 904 getaddr(RTAX_GENMASK, *++argv, 0, nrflags); 905 break; 906 case K_GATEWAY: 907 if (!--argc) 908 usage(NULL); 909 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags); 910 gateway = *argv; 911 break; 912 case K_DST: 913 if (!--argc) 914 usage(NULL); 915 if (getaddr(RTAX_DST, *++argv, &hp, nrflags)) 916 nrflags |= F_ISHOST; 917 dest = *argv; 918 break; 919 case K_NETMASK: 920 if (!--argc) 921 usage(NULL); 922 getaddr(RTAX_NETMASK, *++argv, 0, nrflags); 923 /* FALLTHROUGH */ 924 case K_NET: 925 nrflags |= F_FORCENET; 926 break; 927 case K_PREFIXLEN: 928 if (!--argc) 929 usage(NULL); 930 if (prefixlen(*++argv) == -1) { 931 nrflags &= ~F_FORCENET; 932 nrflags |= F_ISHOST; 933 } else { 934 nrflags |= F_FORCENET; 935 nrflags &= ~F_ISHOST; 936 } 937 break; 938 case K_MTU: 939 case K_HOPCOUNT: 940 case K_EXPIRE: 941 case K_RECVPIPE: 942 case K_SENDPIPE: 943 case K_SSTHRESH: 944 case K_RTT: 945 case K_RTTVAR: 946 case K_WEIGHT: 947 if (!--argc) 948 usage(NULL); 949 set_metric(*++argv, key); 950 break; 951 default: 952 usage(1+*argv); 953 } 954 } else { 955 if ((rtm_addrs & RTA_DST) == 0) { 956 dest = *argv; 957 if (getaddr(RTAX_DST, *argv, &hp, nrflags)) 958 nrflags |= F_ISHOST; 959 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 960 gateway = *argv; 961 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags); 962 } else { 963 getaddr(RTAX_NETMASK, *argv, 0, nrflags); 964 nrflags |= F_FORCENET; 965 } 966 } 967 } 968 969 /* Do some sanity checks on resulting request */ 970 if (so[RTAX_DST].ss_len == 0) { 971 warnx("destination parameter required"); 972 usage(NULL); 973 } 974 975 if (so[RTAX_NETMASK].ss_len != 0 && 976 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 977 warnx("destination and netmask family need to be the same"); 978 usage(NULL); 979 } 980 981 if (nrflags & F_FORCEHOST) { 982 nrflags |= F_ISHOST; 983#ifdef INET6 984 if (af == AF_INET6) { 985 rtm_addrs &= ~RTA_NETMASK; 986 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 987 } 988#endif 989 } 990 if (nrflags & F_FORCENET) 991 nrflags &= ~F_ISHOST; 992 flags |= RTF_UP; 993 if (nrflags & F_ISHOST) 994 flags |= RTF_HOST; 995 if ((nrflags & F_INTERFACE) == 0) 996 flags |= RTF_GATEWAY; 997 if (nrflags & F_PROXY) 998 flags |= RTF_ANNOUNCE; 999 if (dest == NULL) 1000 dest = ""; 1001 if (gateway == NULL) 1002 gateway = ""; 1003 1004 if (TAILQ_EMPTY(&fibl_head)) { 1005 error = fiboptlist_csv("default", &fibl_head); 1006 if (error) 1007 errx(EX_OSERR, "fiboptlist_csv failed."); 1008 } 1009 error = 0; 1010 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1011 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1012 if (fl->fl_error) 1013 fl->fl_errno = errno; 1014 error += fl->fl_error; 1015 } 1016 if (*cmd == 'g' || *cmd == 's') 1017 exit(error); 1018 1019 error = 0; 1020 if (!qflag) { 1021 fibnum = 0; 1022 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1023 if (fl->fl_error == 0) 1024 fibnum++; 1025 } 1026 if (fibnum > 0) { 1027 int firstfib = 1; 1028 1029 printf("%s %s %s", cmd, 1030 (nrflags & F_ISHOST) ? "host" : "net", dest); 1031 if (*gateway) 1032 printf(": gateway %s", gateway); 1033 1034 if (numfibs > 1) { 1035 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1036 if (fl->fl_error == 0 1037 && fl->fl_num >= 0) { 1038 if (firstfib) { 1039 printf(" fib "); 1040 firstfib = 0; 1041 } 1042 printf("%d", fl->fl_num); 1043 if (fibnum-- > 1) 1044 printf(","); 1045 } 1046 } 1047 } 1048 printf("\n"); 1049 } 1050 } 1051 1052 fibnum = 0; 1053 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1054 if (fl->fl_error != 0) { 1055 error = 1; 1056 if (!qflag) { 1057 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1058 ? "host" : "net", dest); 1059 if (*gateway) 1060 printf(": gateway %s", gateway); 1061 1062 if (fl->fl_num >= 0) 1063 printf(" fib %d", fl->fl_num); 1064 1065 switch (fl->fl_errno) { 1066 case ESRCH: 1067 errmsg = "not in table"; 1068 break; 1069 case EBUSY: 1070 errmsg = "entry in use"; 1071 break; 1072 case ENOBUFS: 1073 errmsg = "not enough memory"; 1074 break; 1075 case EADDRINUSE: 1076 /* 1077 * handle recursion avoidance 1078 * in rt_setgate() 1079 */ 1080 errmsg = "gateway uses the same route"; 1081 break; 1082 case EEXIST: 1083 errmsg = "route already in table"; 1084 break; 1085 default: 1086 errmsg = strerror(fl->fl_errno); 1087 break; 1088 } 1089 printf(": %s\n", errmsg); 1090 } 1091 } 1092 } 1093 exit(error); 1094} 1095 1096static int 1097newroute_fib(int fib, char *cmd, int flags) 1098{ 1099 int error; 1100 1101 error = set_sofib(fib); 1102 if (error) { 1103 warn("fib number %d is ignored", fib); 1104 return (error); 1105 } 1106 1107 error = rtmsg(*cmd, flags, fib); 1108 return (error); 1109} 1110 1111#ifdef INET 1112static void 1113inet_makenetandmask(u_long net, struct sockaddr_in *sin, 1114 struct sockaddr_in *sin_mask, u_long bits) 1115{ 1116 u_long mask = 0; 1117 1118 rtm_addrs |= RTA_NETMASK; 1119 1120 /* 1121 * MSB of net should be meaningful. 0/0 is exception. 1122 */ 1123 if (net > 0) 1124 while ((net & 0xff000000) == 0) 1125 net <<= 8; 1126 1127 /* 1128 * If no /xx was specified we must calculate the 1129 * CIDR address. 1130 */ 1131 if ((bits == 0) && (net != 0)) { 1132 u_long i, j; 1133 1134 for(i = 0, j = 0xff; i < 4; i++) { 1135 if (net & j) { 1136 break; 1137 } 1138 j <<= 8; 1139 } 1140 /* i holds the first non zero bit */ 1141 bits = 32 - (i*8); 1142 } 1143 if (bits != 0) 1144 mask = 0xffffffff << (32 - bits); 1145 1146 sin->sin_addr.s_addr = htonl(net); 1147 sin_mask->sin_addr.s_addr = htonl(mask); 1148 sin_mask->sin_len = sizeof(struct sockaddr_in); 1149 sin_mask->sin_family = AF_INET; 1150} 1151#endif 1152 1153#ifdef INET6 1154/* 1155 * XXX the function may need more improvement... 1156 */ 1157static int 1158inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1159{ 1160 1161 if (plen == NULL) { 1162 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1163 sin6->sin6_scope_id == 0) 1164 plen = "0"; 1165 } 1166 1167 if (plen == NULL || strcmp(plen, "128") == 0) 1168 return (1); 1169 rtm_addrs |= RTA_NETMASK; 1170 prefixlen(plen); 1171 return (0); 1172} 1173#endif 1174 1175/* 1176 * Interpret an argument as a network address of some kind, 1177 * returning 1 if a host address, 0 if a network address. 1178 */ 1179static int 1180getaddr(int idx, char *str, struct hostent **hpp, int nrflags) 1181{ 1182 struct sockaddr *sa; 1183#if defined(INET) 1184 struct sockaddr_in *sin; 1185 struct hostent *hp; 1186 struct netent *np; 1187 u_long val; 1188 char *q; 1189#elif defined(INET6) 1190 char *q; 1191#endif 1192 1193 if (idx < 0 || idx >= RTAX_MAX) 1194 usage("internal error"); 1195 if (af == 0) { 1196#if defined(INET) 1197 af = AF_INET; 1198 aflen = sizeof(struct sockaddr_in); 1199#elif defined(INET6) 1200 af = AF_INET6; 1201 aflen = sizeof(struct sockaddr_in6); 1202#else 1203 af = AF_LINK; 1204 aflen = sizeof(struct sockaddr_dl); 1205#endif 1206 } 1207#ifndef INET 1208 hpp = NULL; 1209#endif 1210 rtm_addrs |= (1 << idx); 1211 sa = (struct sockaddr *)&so[idx]; 1212 sa->sa_family = af; 1213 sa->sa_len = aflen; 1214 1215 switch (idx) { 1216 case RTAX_GATEWAY: 1217 if (nrflags & F_INTERFACE) { 1218 struct ifaddrs *ifap, *ifa; 1219 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1220 struct sockaddr_dl *sdl = NULL; 1221 1222 if (getifaddrs(&ifap)) 1223 err(EX_OSERR, "getifaddrs"); 1224 1225 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1226 if (ifa->ifa_addr->sa_family != AF_LINK) 1227 continue; 1228 1229 if (strcmp(str, ifa->ifa_name) != 0) 1230 continue; 1231 1232 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1233 } 1234 /* If we found it, then use it */ 1235 if (sdl != NULL) { 1236 /* 1237 * Note that we need to copy before calling 1238 * freeifaddrs(). 1239 */ 1240 memcpy(sdl0, sdl, sdl->sdl_len); 1241 } 1242 freeifaddrs(ifap); 1243 if (sdl != NULL) 1244 return(1); 1245 else 1246 errx(EX_DATAERR, 1247 "interface '%s' does not exist", str); 1248 } 1249 break; 1250 case RTAX_IFP: 1251 sa->sa_family = AF_LINK; 1252 break; 1253 } 1254 if (strcmp(str, "default") == 0) { 1255 /* 1256 * Default is net 0.0.0.0/0 1257 */ 1258 switch (idx) { 1259 case RTAX_DST: 1260 nrflags |= F_FORCENET; 1261 getaddr(RTAX_NETMASK, str, 0, nrflags); 1262 break; 1263 } 1264 return (0); 1265 } 1266 switch (sa->sa_family) { 1267#ifdef INET6 1268 case AF_INET6: 1269 { 1270 struct addrinfo hints, *res; 1271 int ecode; 1272 1273 q = NULL; 1274 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1275 *q = '\0'; 1276 memset(&hints, 0, sizeof(hints)); 1277 hints.ai_family = sa->sa_family; 1278 hints.ai_socktype = SOCK_DGRAM; 1279 ecode = getaddrinfo(str, NULL, &hints, &res); 1280 if (ecode != 0 || res->ai_family != AF_INET6 || 1281 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1282 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1283 memcpy(sa, res->ai_addr, res->ai_addrlen); 1284 freeaddrinfo(res); 1285 if (q != NULL) 1286 *q++ = '/'; 1287 if (idx == RTAX_DST) 1288 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1289 return (0); 1290 } 1291#endif /* INET6 */ 1292 case AF_LINK: 1293 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1294 return (1); 1295 1296 case PF_ROUTE: 1297 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1298 return (1); 1299#ifdef INET 1300 case AF_INET: 1301#endif 1302 default: 1303 break; 1304 } 1305 1306#ifdef INET 1307 sin = (struct sockaddr_in *)(void *)sa; 1308 if (hpp == NULL) 1309 hpp = &hp; 1310 *hpp = NULL; 1311 1312 q = strchr(str,'/'); 1313 if (q != NULL && idx == RTAX_DST) { 1314 *q = '\0'; 1315 if ((val = inet_network(str)) != INADDR_NONE) { 1316 inet_makenetandmask(val, sin, 1317 (struct sockaddr_in *)&so[RTAX_NETMASK], 1318 strtoul(q+1, 0, 0)); 1319 return (0); 1320 } 1321 *q = '/'; 1322 } 1323 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) && 1324 inet_aton(str, &sin->sin_addr)) { 1325 val = sin->sin_addr.s_addr; 1326 if (idx != RTAX_DST || nrflags & F_FORCEHOST || 1327 inet_lnaof(sin->sin_addr) != INADDR_ANY) 1328 return (1); 1329 else { 1330 val = ntohl(val); 1331 goto netdone; 1332 } 1333 } 1334 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 && 1335 ((val = inet_network(str)) != INADDR_NONE || 1336 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1337netdone: 1338 inet_makenetandmask(val, sin, 1339 (struct sockaddr_in *)&so[RTAX_NETMASK], 0); 1340 return (0); 1341 } 1342 hp = gethostbyname(str); 1343 if (hp != NULL) { 1344 *hpp = hp; 1345 sin->sin_family = hp->h_addrtype; 1346 memmove((char *)&sin->sin_addr, hp->h_addr, 1347 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1348 return (1); 1349 } 1350#endif 1351 errx(EX_NOHOST, "bad address: %s", str); 1352} 1353 1354static int 1355prefixlen(const char *str) 1356{ 1357 int len = atoi(str), q, r; 1358 int max; 1359 char *p; 1360 1361 rtm_addrs |= RTA_NETMASK; 1362 switch (af) { 1363#ifdef INET6 1364 case AF_INET6: 1365 { 1366 struct sockaddr_in6 *sin6 = 1367 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1368 1369 max = 128; 1370 p = (char *)&sin6->sin6_addr; 1371 sin6->sin6_family = AF_INET6; 1372 sin6->sin6_len = sizeof(*sin6); 1373 break; 1374 } 1375#endif 1376#ifdef INET 1377 case AF_INET: 1378 { 1379 struct sockaddr_in *sin = 1380 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1381 1382 max = 32; 1383 p = (char *)&sin->sin_addr; 1384 sin->sin_family = AF_INET; 1385 sin->sin_len = sizeof(*sin); 1386 break; 1387 } 1388#endif 1389 default: 1390 errx(EX_OSERR, "prefixlen not supported in this af"); 1391 } 1392 1393 if (len < 0 || max < len) 1394 errx(EX_USAGE, "%s: invalid prefixlen", str); 1395 1396 q = len >> 3; 1397 r = len & 7; 1398 memset((void *)p, 0, max / 8); 1399 if (q > 0) 1400 memset((void *)p, 0xff, q); 1401 if (r > 0) 1402 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1403 if (len == max) 1404 return (-1); 1405 else 1406 return (len); 1407} 1408 1409static void 1410interfaces(void) 1411{ 1412 size_t needed; 1413 int mib[6]; 1414 char *buf, *lim, *next, count = 0; 1415 struct rt_msghdr *rtm; 1416 1417retry2: 1418 mib[0] = CTL_NET; 1419 mib[1] = PF_ROUTE; 1420 mib[2] = 0; /* protocol */ 1421 mib[3] = AF_UNSPEC; 1422 mib[4] = NET_RT_IFLIST; 1423 mib[5] = 0; /* no flags */ 1424 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1425 err(EX_OSERR, "route-sysctl-estimate"); 1426 if ((buf = malloc(needed)) == NULL) 1427 errx(EX_OSERR, "malloc failed"); 1428 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1429 if (errno == ENOMEM && count++ < 10) { 1430 warnx("Routing table grew, retrying"); 1431 sleep(1); 1432 free(buf); 1433 goto retry2; 1434 } 1435 err(EX_OSERR, "actual retrieval of interface table"); 1436 } 1437 lim = buf + needed; 1438 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1439 rtm = (struct rt_msghdr *)(void *)next; 1440 print_rtmsg(rtm, rtm->rtm_msglen); 1441 } 1442} 1443 1444static void 1445monitor(int argc, char *argv[]) 1446{ 1447 int n, fib, error; 1448 char msg[2048], *endptr; 1449 1450 fib = defaultfib; 1451 while (argc > 1) { 1452 argc--; 1453 argv++; 1454 if (**argv != '-') 1455 usage(*argv); 1456 switch (keyword(*argv + 1)) { 1457 case K_FIB: 1458 if (!--argc) 1459 usage(*argv); 1460 errno = 0; 1461 fib = strtol(*++argv, &endptr, 0); 1462 if (errno == 0) { 1463 if (*endptr != '\0' || 1464 fib < 0 || 1465 (numfibs != -1 && fib > numfibs - 1)) 1466 errno = EINVAL; 1467 } 1468 if (errno) 1469 errx(EX_USAGE, "invalid fib number: %s", *argv); 1470 break; 1471 default: 1472 usage(*argv); 1473 } 1474 } 1475 error = set_sofib(fib); 1476 if (error) 1477 errx(EX_USAGE, "invalid fib number: %d", fib); 1478 1479 verbose = 1; 1480 if (debugonly) { 1481 interfaces(); 1482 exit(0); 1483 } 1484 for (;;) { 1485 time_t now; 1486 n = read(s, msg, 2048); 1487 now = time(NULL); 1488 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1489 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1490 } 1491} 1492 1493static int 1494rtmsg(int cmd, int flags, int fib) 1495{ 1496 int rlen; 1497 char *cp = m_rtmsg.m_space; 1498 int l; 1499 1500#define NEXTADDR(w, u) \ 1501 if (rtm_addrs & (w)) { \ 1502 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \ 1503 sizeof(long) : \ 1504 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \ 1505 | (sizeof(long) - 1)); \ 1506 memmove(cp, (char *)&(u), l); \ 1507 cp += l; \ 1508 if (verbose) \ 1509 sodump((struct sockaddr *)&(u), #w); \ 1510 } 1511 1512 errno = 0; 1513 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1514 if (cmd == 'a') 1515 cmd = RTM_ADD; 1516 else if (cmd == 'c') 1517 cmd = RTM_CHANGE; 1518 else if (cmd == 'g' || cmd == 's') { 1519 cmd = RTM_GET; 1520 if (so[RTAX_IFP].ss_family == 0) { 1521 so[RTAX_IFP].ss_family = AF_LINK; 1522 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1523 rtm_addrs |= RTA_IFP; 1524 } 1525 } else { 1526 cmd = RTM_DELETE; 1527 flags |= RTF_PINNED; 1528 } 1529#define rtm m_rtmsg.m_rtm 1530 rtm.rtm_type = cmd; 1531 rtm.rtm_flags = flags; 1532 rtm.rtm_version = RTM_VERSION; 1533 rtm.rtm_seq = ++rtm_seq; 1534 rtm.rtm_addrs = rtm_addrs; 1535 rtm.rtm_rmx = rt_metrics; 1536 rtm.rtm_inits = rtm_inits; 1537 1538 NEXTADDR(RTA_DST, so[RTAX_DST]); 1539 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1540 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1541 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1542 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1543 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1544 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1545 if (verbose) 1546 print_rtmsg(&rtm, l); 1547 if (debugonly) 1548 return (0); 1549 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1550 switch (errno) { 1551 case EPERM: 1552 err(1, "writing to routing socket"); 1553 break; 1554 case ESRCH: 1555 warnx("route has not been found"); 1556 break; 1557 case EEXIST: 1558 /* Handled by newroute() */ 1559 break; 1560 default: 1561 warn("writing to routing socket"); 1562 } 1563 return (-1); 1564 } 1565 if (cmd == RTM_GET) { 1566 stop_read = 0; 1567 alarm(READ_TIMEOUT); 1568 do { 1569 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1570 } while (l > 0 && stop_read == 0 && 1571 (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid)); 1572 if (stop_read != 0) { 1573 warnx("read from routing socket timed out"); 1574 return (-1); 1575 } else 1576 alarm(0); 1577 if (l < 0) 1578 warn("read from routing socket"); 1579 else 1580 print_getmsg(&rtm, l, fib); 1581 } 1582#undef rtm 1583 return (0); 1584} 1585 1586static const char *const msgtypes[] = { 1587 "", 1588 "RTM_ADD: Add Route", 1589 "RTM_DELETE: Delete Route", 1590 "RTM_CHANGE: Change Metrics or flags", 1591 "RTM_GET: Report Metrics", 1592 "RTM_LOSING: Kernel Suspects Partitioning", 1593 "RTM_REDIRECT: Told to use different route", 1594 "RTM_MISS: Lookup failed on this address", 1595 "RTM_LOCK: fix specified metrics", 1596 "RTM_OLDADD: caused by SIOCADDRT", 1597 "RTM_OLDDEL: caused by SIOCDELRT", 1598 "RTM_RESOLVE: Route created by cloning", 1599 "RTM_NEWADDR: address being added to iface", 1600 "RTM_DELADDR: address being removed from iface", 1601 "RTM_IFINFO: iface status change", 1602 "RTM_NEWMADDR: new multicast group membership on iface", 1603 "RTM_DELMADDR: multicast group membership removed from iface", 1604 "RTM_IFANNOUNCE: interface arrival/departure", 1605 "RTM_IEEE80211: IEEE 802.11 wireless event", 1606}; 1607 1608static const char metricnames[] = 1609 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1610 "\1mtu"; 1611static const char routeflags[] = 1612 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1613 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1614 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1615 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1616static const char ifnetflags[] = 1617 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1618 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1619 "\017LINK2\020MULTICAST"; 1620static const char addrnames[] = 1621 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1622 1623static const char errfmt[] = 1624 "\n%s: truncated route message, only %zu bytes left\n"; 1625 1626static void 1627print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1628{ 1629 struct if_msghdr *ifm; 1630 struct ifa_msghdr *ifam; 1631#ifdef RTM_NEWMADDR 1632 struct ifma_msghdr *ifmam; 1633#endif 1634 struct if_announcemsghdr *ifan; 1635 const char *state; 1636 1637 if (verbose == 0) 1638 return; 1639 if (rtm->rtm_version != RTM_VERSION) { 1640 (void)printf("routing message version %d not understood\n", 1641 rtm->rtm_version); 1642 return; 1643 } 1644 if (rtm->rtm_type < nitems(msgtypes)) 1645 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1646 else 1647 (void)printf("unknown type %d: ", rtm->rtm_type); 1648 (void)printf("len %d, ", rtm->rtm_msglen); 1649 1650#define REQUIRE(x) do { \ 1651 if (msglen < sizeof(x)) \ 1652 goto badlen; \ 1653 else \ 1654 msglen -= sizeof(x); \ 1655 } while (0) 1656 1657 switch (rtm->rtm_type) { 1658 case RTM_IFINFO: 1659 REQUIRE(struct if_msghdr); 1660 ifm = (struct if_msghdr *)rtm; 1661 (void)printf("if# %d, ", ifm->ifm_index); 1662 switch (ifm->ifm_data.ifi_link_state) { 1663 case LINK_STATE_DOWN: 1664 state = "down"; 1665 break; 1666 case LINK_STATE_UP: 1667 state = "up"; 1668 break; 1669 default: 1670 state = "unknown"; 1671 break; 1672 } 1673 (void)printf("link: %s, flags:", state); 1674 printb(ifm->ifm_flags, ifnetflags); 1675 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1676 break; 1677 case RTM_NEWADDR: 1678 case RTM_DELADDR: 1679 REQUIRE(struct ifa_msghdr); 1680 ifam = (struct ifa_msghdr *)rtm; 1681 (void)printf("metric %d, flags:", ifam->ifam_metric); 1682 printb(ifam->ifam_flags, routeflags); 1683 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1684 break; 1685#ifdef RTM_NEWMADDR 1686 case RTM_NEWMADDR: 1687 case RTM_DELMADDR: 1688 REQUIRE(struct ifma_msghdr); 1689 ifmam = (struct ifma_msghdr *)rtm; 1690 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1691 break; 1692#endif 1693 case RTM_IFANNOUNCE: 1694 REQUIRE(struct if_announcemsghdr); 1695 ifan = (struct if_announcemsghdr *)rtm; 1696 (void)printf("if# %d, what: ", ifan->ifan_index); 1697 switch (ifan->ifan_what) { 1698 case IFAN_ARRIVAL: 1699 (void)printf("arrival"); 1700 break; 1701 case IFAN_DEPARTURE: 1702 printf("departure"); 1703 break; 1704 default: 1705 printf("#%d", ifan->ifan_what); 1706 break; 1707 } 1708 printf("\n"); 1709 fflush(stdout); 1710 break; 1711 1712 default: 1713 printf("pid: %ld, seq %d, errno %d, flags:", 1714 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1715 printb(rtm->rtm_flags, routeflags); 1716 pmsg_common(rtm, msglen); 1717 } 1718 1719 return; 1720 1721badlen: 1722 (void)printf(errfmt, __func__, msglen); 1723#undef REQUIRE 1724} 1725 1726static void 1727print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1728{ 1729 struct sockaddr *sp[RTAX_MAX]; 1730 struct timespec ts; 1731 char *cp; 1732 int i; 1733 1734 memset(sp, 0, sizeof(sp)); 1735 (void)printf(" route to: %s\n", 1736 routename((struct sockaddr *)&so[RTAX_DST])); 1737 if (rtm->rtm_version != RTM_VERSION) { 1738 warnx("routing message version %d not understood", 1739 rtm->rtm_version); 1740 return; 1741 } 1742 if (rtm->rtm_msglen > msglen) { 1743 warnx("message length mismatch, in packet %d, returned %d", 1744 rtm->rtm_msglen, msglen); 1745 return; 1746 } 1747 if (rtm->rtm_errno) { 1748 errno = rtm->rtm_errno; 1749 warn("message indicates error %d", errno); 1750 return; 1751 } 1752 cp = ((char *)(rtm + 1)); 1753 for (i = 0; i < RTAX_MAX; i++) 1754 if (rtm->rtm_addrs & (1 << i)) { 1755 sp[i] = (struct sockaddr *)cp; 1756 cp += SA_SIZE((struct sockaddr *)cp); 1757 } 1758 if ((rtm->rtm_addrs & RTA_IFP) && 1759 (sp[RTAX_IFP]->sa_family != AF_LINK || 1760 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1761 sp[RTAX_IFP] = NULL; 1762 if (sp[RTAX_DST]) 1763 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1764 if (sp[RTAX_NETMASK]) 1765 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1766 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1767 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1768 if (fib >= 0) 1769 (void)printf(" fib: %u\n", (unsigned int)fib); 1770 if (sp[RTAX_IFP]) 1771 (void)printf(" interface: %.*s\n", 1772 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1773 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1774 (void)printf(" flags: "); 1775 printb(rtm->rtm_flags, routeflags); 1776 1777#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1778#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1779 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1780 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1781 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1782 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1783 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1784 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1785 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1786 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1787 if (rtm->rtm_rmx.rmx_expire > 0) 1788 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1789 else 1790 ts.tv_sec = 0; 1791 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1792 lock(EXPIRE)); 1793#undef lock 1794#undef msec 1795#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1796 if (verbose) 1797 pmsg_common(rtm, msglen); 1798 else if (rtm->rtm_addrs &~ RTA_IGN) { 1799 (void)printf("sockaddrs: "); 1800 printb(rtm->rtm_addrs, addrnames); 1801 putchar('\n'); 1802 } 1803#undef RTA_IGN 1804} 1805 1806static void 1807pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1808{ 1809 1810 (void)printf("\nlocks: "); 1811 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1812 (void)printf(" inits: "); 1813 printb(rtm->rtm_inits, metricnames); 1814 if (msglen > sizeof(struct rt_msghdr)) 1815 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1816 msglen - sizeof(struct rt_msghdr)); 1817 else 1818 (void)fflush(stdout); 1819} 1820 1821static void 1822pmsg_addrs(char *cp, int addrs, size_t len) 1823{ 1824 struct sockaddr *sa; 1825 int i; 1826 1827 if (addrs == 0) { 1828 (void)putchar('\n'); 1829 return; 1830 } 1831 (void)printf("\nsockaddrs: "); 1832 printb(addrs, addrnames); 1833 putchar('\n'); 1834 for (i = 0; i < RTAX_MAX; i++) 1835 if (addrs & (1 << i)) { 1836 sa = (struct sockaddr *)cp; 1837 if (len == 0 || len < SA_SIZE(sa)) { 1838 (void)printf(errfmt, __func__, len); 1839 break; 1840 } 1841 (void)printf(" %s", routename(sa)); 1842 len -= SA_SIZE(sa); 1843 cp += SA_SIZE(sa); 1844 } 1845 (void)putchar('\n'); 1846 (void)fflush(stdout); 1847} 1848 1849static void 1850printb(int b, const char *str) 1851{ 1852 int i; 1853 int gotsome = 0; 1854 1855 if (b == 0) 1856 return; 1857 while ((i = *str++) != 0) { 1858 if (b & (1 << (i-1))) { 1859 if (gotsome == 0) 1860 i = '<'; 1861 else 1862 i = ','; 1863 putchar(i); 1864 gotsome = 1; 1865 for (; (i = *str) > 32; str++) 1866 putchar(i); 1867 } else 1868 while (*str > 32) 1869 str++; 1870 } 1871 if (gotsome) 1872 putchar('>'); 1873} 1874 1875int 1876keyword(const char *cp) 1877{ 1878 const struct keytab *kt = keywords; 1879 1880 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1881 kt++; 1882 return (kt->kt_i); 1883} 1884 1885static void 1886sodump(struct sockaddr *sa, const char *which) 1887{ 1888#ifdef INET6 1889 char nbuf[INET6_ADDRSTRLEN]; 1890#endif 1891 1892 switch (sa->sa_family) { 1893 case AF_LINK: 1894 (void)printf("%s: link %s; ", which, 1895 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1896 break; 1897#ifdef INET 1898 case AF_INET: 1899 (void)printf("%s: inet %s; ", which, 1900 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1901 break; 1902#endif 1903#ifdef INET6 1904 case AF_INET6: 1905 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1906 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1907 sizeof(nbuf))); 1908 break; 1909#endif 1910 } 1911 (void)fflush(stdout); 1912} 1913 1914/* States*/ 1915#define VIRGIN 0 1916#define GOTONE 1 1917#define GOTTWO 2 1918/* Inputs */ 1919#define DIGIT (4*0) 1920#define END (4*1) 1921#define DELIM (4*2) 1922 1923static void 1924sockaddr(char *addr, struct sockaddr *sa, size_t size) 1925{ 1926 char *cp = (char *)sa; 1927 char *cplim = cp + size; 1928 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1929 1930 memset(cp, 0, size); 1931 cp++; 1932 do { 1933 if ((*addr >= '0') && (*addr <= '9')) { 1934 new = *addr - '0'; 1935 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1936 new = *addr - 'a' + 10; 1937 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1938 new = *addr - 'A' + 10; 1939 } else if (*addr == '\0') 1940 state |= END; 1941 else 1942 state |= DELIM; 1943 addr++; 1944 switch (state /* | INPUT */) { 1945 case GOTTWO | DIGIT: 1946 *cp++ = byte; /*FALLTHROUGH*/ 1947 case VIRGIN | DIGIT: 1948 state = GOTONE; byte = new; continue; 1949 case GOTONE | DIGIT: 1950 state = GOTTWO; byte = new + (byte << 4); continue; 1951 default: /* | DELIM */ 1952 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1953 case GOTONE | END: 1954 case GOTTWO | END: 1955 *cp++ = byte; /* FALLTHROUGH */ 1956 case VIRGIN | END: 1957 break; 1958 } 1959 break; 1960 } while (cp < cplim); 1961 sa->sa_len = cp - (char *)sa; 1962} 1963