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#include <sys/param.h> 33#include <sys/file.h> 34#include <sys/socket.h> 35#include <sys/ioctl.h> 36#ifdef JAIL 37#include <sys/jail.h> 38#endif 39#include <sys/sysctl.h> 40#include <sys/types.h> 41#include <sys/queue.h> 42 43#include <net/if.h> 44#include <net/route.h> 45#include <net/if_dl.h> 46#include <netinet/in.h> 47#include <netinet/if_ether.h> 48#include <arpa/inet.h> 49#include <netdb.h> 50 51#include <ctype.h> 52#include <err.h> 53#include <errno.h> 54#ifdef JAIL 55#include <jail.h> 56#endif 57#include <paths.h> 58#include <signal.h> 59#include <stdbool.h> 60#include <stdio.h> 61#include <stdlib.h> 62#include <string.h> 63#include <sysexits.h> 64#include <time.h> 65#include <unistd.h> 66#include <ifaddrs.h> 67 68struct fibl { 69 TAILQ_ENTRY(fibl) fl_next; 70 71 int fl_num; 72 int fl_error; 73 int fl_errno; 74}; 75 76static struct keytab { 77 const char *kt_cp; 78 int kt_i; 79} const keywords[] = { 80#include "keywords.h" 81 {0, 0} 82}; 83 84int verbose, debugonly; 85#ifdef JAIL 86char * jail_name; 87#endif 88static struct sockaddr_storage so[RTAX_MAX]; 89static int pid, rtm_addrs; 90static int nflag, af, aflen, qflag, tflag; 91static int locking, lockrest; 92static struct rt_metrics rt_metrics; 93static u_long rtm_inits; 94static uid_t uid; 95static int defaultfib; 96static int numfibs; 97static char domain[MAXHOSTNAMELEN + 1]; 98static bool domain_initialized; 99static char rt_line[NI_MAXHOST]; 100static char net_line[MAXHOSTNAMELEN + 1]; 101 102#ifdef WITHOUT_NETLINK 103static int s; 104static int rtm_seq; 105 106static struct { 107 struct rt_msghdr m_rtm; 108 char m_space[512]; 109} m_rtmsg; 110 111static int rtmsg_rtsock(int, int, int); 112static int flushroutes_fib_rtsock(int); 113static void monitor_rtsock(void); 114#else 115int rtmsg_nl(int, int, int, int, struct sockaddr_storage *, struct rt_metrics *); 116int flushroutes_fib_nl(int, int); 117void monitor_nl(int); 118#endif 119 120static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; 121 122void printb(int, const char *); 123static void flushroutes(int argc, char *argv[]); 124static int flushroutes_fib(int); 125static int getaddr(int, char *, int); 126static int keyword(const char *); 127#ifdef INET 128static void inet_makemask(struct sockaddr_in *, u_long); 129#endif 130#ifdef INET6 131static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 132#endif 133static void interfaces(void); 134static void monitor(int, char*[]); 135const char *netname(struct sockaddr *); 136static void newroute(int, char **); 137static int newroute_fib(int, char *, int); 138static void pmsg_addrs(char *, int, size_t); 139static void pmsg_common(struct rt_msghdr *, size_t); 140static int prefixlen(const char *); 141static void print_getmsg(struct rt_msghdr *, int, int); 142static void print_rtmsg(struct rt_msghdr *, size_t); 143const char *routename(struct sockaddr *); 144static int rtmsg(int, int, int); 145static void set_metric(char *, int); 146static int set_sofib(int); 147static void sockaddr(char *, struct sockaddr *, size_t); 148static void sodump(struct sockaddr *, const char *); 149static int fiboptlist_csv(const char *, struct fibl_head_t *); 150static int fiboptlist_range(const char *, struct fibl_head_t *); 151 152static void usage(const char *) __dead2; 153 154#define READ_TIMEOUT 10 155static volatile sig_atomic_t stop_read; 156 157static void 158stopit(int sig __unused) 159{ 160 161 stop_read = 1; 162} 163 164static void 165usage(const char *cp) 166{ 167 if (cp != NULL) 168 warnx("bad keyword: %s", cp); 169 errx(EX_USAGE, "usage: route [-j jail] [-46dnqtv] command [[modifiers] args]"); 170 /* NOTREACHED */ 171} 172 173int 174main(int argc, char **argv) 175{ 176 int ch; 177#ifdef JAIL 178 int jid; 179#endif 180 size_t len; 181 182 if (argc < 2) 183 usage(NULL); 184 185 while ((ch = getopt(argc, argv, "46nqdtvj:")) != -1) 186 switch(ch) { 187 case '4': 188#ifdef INET 189 af = AF_INET; 190 aflen = sizeof(struct sockaddr_in); 191#else 192 errx(1, "IPv4 support is not compiled in"); 193#endif 194 break; 195 case '6': 196#ifdef INET6 197 af = AF_INET6; 198 aflen = sizeof(struct sockaddr_in6); 199#else 200 errx(1, "IPv6 support is not compiled in"); 201#endif 202 break; 203 case 'n': 204 nflag = 1; 205 break; 206 case 'q': 207 qflag = 1; 208 break; 209 case 'v': 210 verbose = 1; 211 break; 212 case 't': 213 tflag = 1; 214 break; 215 case 'd': 216 debugonly = 1; 217 break; 218 case 'j': 219#ifdef JAIL 220 if (optarg == NULL) 221 usage(NULL); 222 jail_name = optarg; 223#else 224 errx(1, "Jail support is not compiled in"); 225#endif 226 break; 227 case '?': 228 default: 229 usage(NULL); 230 } 231 argc -= optind; 232 argv += optind; 233 234 pid = getpid(); 235 uid = geteuid(); 236 237#ifdef JAIL 238 if (jail_name != NULL) { 239 jid = jail_getid(jail_name); 240 if (jid == -1) 241 errx(1, "Jail not found"); 242 if (jail_attach(jid) != 0) 243 errx(1, "Cannot attach to jail"); 244 } 245#endif 246 247#ifdef WITHOUT_NETLINK 248 if (tflag) 249 s = open(_PATH_DEVNULL, O_WRONLY, 0); 250 else 251 s = socket(PF_ROUTE, SOCK_RAW, 0); 252 if (s < 0) 253 err(EX_OSERR, "socket"); 254#endif 255 256 len = sizeof(numfibs); 257 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) 258 numfibs = -1; 259 260 len = sizeof(defaultfib); 261 if (numfibs != -1 && 262 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 263 0) == -1) 264 defaultfib = -1; 265 266 if (*argv != NULL) 267 switch (keyword(*argv)) { 268 case K_GET: 269 case K_SHOW: 270 uid = 0; 271 /* FALLTHROUGH */ 272 273 case K_CHANGE: 274 case K_ADD: 275 case K_DEL: 276 case K_DELETE: 277 newroute(argc, argv); 278 /* NOTREACHED */ 279 280 case K_MONITOR: 281 monitor(argc, argv); 282 /* NOTREACHED */ 283 284 case K_FLUSH: 285 flushroutes(argc, argv); 286 exit(0); 287 /* NOTREACHED */ 288 } 289 usage(*argv); 290 /* NOTREACHED */ 291} 292 293static int 294set_sofib(int fib) 295{ 296 297#ifdef WITHOUT_NETLINK 298 if (fib < 0) 299 return (0); 300 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, 301 sizeof(fib))); 302#else 303 return (0); 304#endif 305} 306 307static int 308fiboptlist_range(const char *arg, struct fibl_head_t *flh) 309{ 310 struct fibl *fl; 311 char *str0, *str, *token, *endptr; 312 int fib[2], i, error; 313 314 str0 = str = strdup(arg); 315 error = 0; 316 i = 0; 317 while ((token = strsep(&str, "-")) != NULL) { 318 switch (i) { 319 case 0: 320 case 1: 321 errno = 0; 322 fib[i] = strtol(token, &endptr, 0); 323 if (errno == 0) { 324 if (*endptr != '\0' || 325 fib[i] < 0 || 326 (numfibs != -1 && fib[i] > numfibs - 1)) 327 errno = EINVAL; 328 } 329 if (errno) 330 error = 1; 331 break; 332 default: 333 error = 1; 334 } 335 if (error) 336 goto fiboptlist_range_ret; 337 i++; 338 } 339 if (fib[0] >= fib[1]) { 340 error = 1; 341 goto fiboptlist_range_ret; 342 } 343 for (i = fib[0]; i <= fib[1]; i++) { 344 fl = calloc(1, sizeof(*fl)); 345 if (fl == NULL) { 346 error = 1; 347 goto fiboptlist_range_ret; 348 } 349 fl->fl_num = i; 350 TAILQ_INSERT_TAIL(flh, fl, fl_next); 351 } 352fiboptlist_range_ret: 353 free(str0); 354 return (error); 355} 356 357#define ALLSTRLEN 64 358static int 359fiboptlist_csv(const char *arg, struct fibl_head_t *flh) 360{ 361 struct fibl *fl; 362 char *str0, *str, *token, *endptr; 363 int fib, error; 364 365 str0 = str = NULL; 366 if (strcmp("all", arg) == 0) { 367 str = calloc(1, ALLSTRLEN); 368 if (str == NULL) { 369 error = 1; 370 goto fiboptlist_csv_ret; 371 } 372 if (numfibs > 1) 373 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); 374 else 375 snprintf(str, ALLSTRLEN - 1, "%d", 0); 376 } else if (strcmp("default", arg) == 0) { 377 str0 = str = calloc(1, ALLSTRLEN); 378 if (str == NULL) { 379 error = 1; 380 goto fiboptlist_csv_ret; 381 } 382 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); 383 } else 384 str0 = str = strdup(arg); 385 386 error = 0; 387 while ((token = strsep(&str, ",")) != NULL) { 388 if (*token != '-' && strchr(token, '-') != NULL) { 389 error = fiboptlist_range(token, flh); 390 if (error) 391 goto fiboptlist_csv_ret; 392 } else { 393 errno = 0; 394 fib = strtol(token, &endptr, 0); 395 if (errno == 0) { 396 if (*endptr != '\0' || 397 fib < 0 || 398 (numfibs != -1 && fib > numfibs - 1)) 399 errno = EINVAL; 400 } 401 if (errno) { 402 error = 1; 403 goto fiboptlist_csv_ret; 404 } 405 fl = calloc(1, sizeof(*fl)); 406 if (fl == NULL) { 407 error = 1; 408 goto fiboptlist_csv_ret; 409 } 410 fl->fl_num = fib; 411 TAILQ_INSERT_TAIL(flh, fl, fl_next); 412 } 413 } 414fiboptlist_csv_ret: 415 if (str0 != NULL) 416 free(str0); 417 return (error); 418} 419 420/* 421 * Purge all entries in the routing tables not 422 * associated with network interfaces. 423 */ 424static void 425flushroutes(int argc, char *argv[]) 426{ 427 struct fibl *fl; 428 int error; 429 430 if (uid != 0 && !debugonly && !tflag) 431 errx(EX_NOPERM, "must be root to alter routing table"); 432#ifdef WITHOUT_NETLINK 433 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 434#endif 435 436 TAILQ_INIT(&fibl_head); 437 while (argc > 1) { 438 argc--; 439 argv++; 440 if (**argv != '-') 441 usage(*argv); 442 switch (keyword(*argv + 1)) { 443#ifdef INET 444 case K_4: 445 case K_INET: 446 af = AF_INET; 447 break; 448#endif 449#ifdef INET6 450 case K_6: 451 case K_INET6: 452 af = AF_INET6; 453 break; 454#endif 455 case K_LINK: 456 af = AF_LINK; 457 break; 458 case K_FIB: 459 if (!--argc) 460 usage(*argv); 461 error = fiboptlist_csv(*++argv, &fibl_head); 462 if (error) 463 errx(EX_USAGE, "invalid fib number: %s", *argv); 464 break; 465 default: 466 usage(*argv); 467 } 468 } 469 if (TAILQ_EMPTY(&fibl_head)) { 470 error = fiboptlist_csv("default", &fibl_head); 471 if (error) 472 errx(EX_OSERR, "fiboptlist_csv failed."); 473 } 474 TAILQ_FOREACH(fl, &fibl_head, fl_next) 475 flushroutes_fib(fl->fl_num); 476} 477 478static int 479flushroutes_fib(int fib) 480{ 481#ifdef WITHOUT_NETLINK 482 return (flushroutes_fib_rtsock(fib)); 483#else 484 return (flushroutes_fib_nl(fib, af)); 485#endif 486} 487 488#ifdef WITHOUT_NETLINK 489static int 490flushroutes_fib_rtsock(int fib) 491{ 492 struct rt_msghdr *rtm; 493 size_t needed; 494 char *buf, *next, *lim; 495 int mib[7], rlen, seqno, count = 0; 496 int error; 497 498 error = set_sofib(fib); 499 if (error) { 500 warn("fib number %d is ignored", fib); 501 return (error); 502 } 503 504retry: 505 mib[0] = CTL_NET; 506 mib[1] = PF_ROUTE; 507 mib[2] = 0; /* protocol */ 508 mib[3] = AF_UNSPEC; 509 mib[4] = NET_RT_DUMP; 510 mib[5] = 0; /* no flags */ 511 mib[6] = fib; 512 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 513 err(EX_OSERR, "route-sysctl-estimate"); 514 if ((buf = malloc(needed)) == NULL) 515 errx(EX_OSERR, "malloc failed"); 516 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 517 if (errno == ENOMEM && count++ < 10) { 518 warnx("Routing table grew, retrying"); 519 sleep(1); 520 free(buf); 521 goto retry; 522 } 523 err(EX_OSERR, "route-sysctl-get"); 524 } 525 lim = buf + needed; 526 if (verbose) 527 (void)printf("Examining routing table from sysctl\n"); 528 seqno = 0; /* ??? */ 529 for (next = buf; next < lim; next += rtm->rtm_msglen) { 530 rtm = (struct rt_msghdr *)(void *)next; 531 if (verbose) 532 print_rtmsg(rtm, rtm->rtm_msglen); 533 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 534 continue; 535 if (af != 0) { 536 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 537 538 if (sa->sa_family != af) 539 continue; 540 } 541 if (debugonly) 542 continue; 543 rtm->rtm_type = RTM_DELETE; 544 rtm->rtm_seq = seqno; 545 rlen = write(s, next, rtm->rtm_msglen); 546 if (rlen < 0 && errno == EPERM) 547 err(1, "write to routing socket"); 548 if (rlen < (int)rtm->rtm_msglen) { 549 warn("write to routing socket"); 550 (void)printf("got only %d for rlen\n", rlen); 551 free(buf); 552 goto retry; 553 break; 554 } 555 seqno++; 556 if (qflag) 557 continue; 558 if (verbose) 559 print_rtmsg(rtm, rlen); 560 else { 561 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 562 563 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 564 routename(sa) : netname(sa)); 565 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 566 printf("%-20.20s ", routename(sa)); 567 if (fib >= 0) 568 printf("-fib %-3d ", fib); 569 printf("done\n"); 570 } 571 } 572 free(buf); 573 return (error); 574} 575#endif 576 577const char * 578routename(struct sockaddr *sa) 579{ 580 struct sockaddr_dl *sdl; 581 const char *cp; 582 int n; 583 584 if (!domain_initialized) { 585 domain_initialized = true; 586 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 587 (cp = strchr(domain, '.'))) { 588 domain[MAXHOSTNAMELEN] = '\0'; 589 (void)strcpy(domain, cp + 1); 590 } else 591 domain[0] = '\0'; 592 } 593 594 /* If the address is zero-filled, use "default". */ 595 if (sa->sa_len == 0 && nflag == 0) 596 return ("default"); 597#if defined(INET) || defined(INET6) 598 switch (sa->sa_family) { 599#ifdef INET 600 case AF_INET: 601 /* If the address is zero-filled, use "default". */ 602 if (nflag == 0 && 603 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == 604 INADDR_ANY) 605 return("default"); 606 break; 607#endif 608#ifdef INET6 609 case AF_INET6: 610 /* If the address is zero-filled, use "default". */ 611 if (nflag == 0 && 612 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) 613 return("default"); 614 break; 615#endif 616 } 617#endif 618 619 switch (sa->sa_family) { 620#if defined(INET) || defined(INET6) 621#ifdef INET 622 case AF_INET: 623#endif 624#ifdef INET6 625 case AF_INET6: 626#endif 627 { 628 struct sockaddr_storage ss; 629 int error; 630 char *p; 631 632 memset(&ss, 0, sizeof(ss)); 633 if (sa->sa_len == 0) 634 ss.ss_family = sa->sa_family; 635 else 636 memcpy(&ss, sa, sa->sa_len); 637 /* Expand sa->sa_len because it could be shortened. */ 638 if (sa->sa_family == AF_INET) 639 ss.ss_len = sizeof(struct sockaddr_in); 640 else if (sa->sa_family == AF_INET6) 641 ss.ss_len = sizeof(struct sockaddr_in6); 642 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, 643 rt_line, sizeof(rt_line), NULL, 0, 644 (nflag == 0) ? 0 : NI_NUMERICHOST); 645 if (error) { 646 warnx("getnameinfo(): %s", gai_strerror(error)); 647 strncpy(rt_line, "invalid", sizeof(rt_line)); 648 } 649 650 /* Remove the domain part if any. */ 651 p = strchr(rt_line, '.'); 652 if (p != NULL && strcmp(p + 1, domain) == 0) 653 *p = '\0'; 654 655 return (rt_line); 656 break; 657 } 658#endif 659 case AF_LINK: 660 sdl = (struct sockaddr_dl *)(void *)sa; 661 662 if (sdl->sdl_nlen == 0 && 663 sdl->sdl_alen == 0 && 664 sdl->sdl_slen == 0) { 665 n = snprintf(rt_line, sizeof(rt_line), "link#%d", 666 sdl->sdl_index); 667 if (n > (int)sizeof(rt_line)) 668 rt_line[0] = '\0'; 669 return (rt_line); 670 } else 671 return (link_ntoa(sdl)); 672 break; 673 674 default: 675 { 676 u_short *sp = (u_short *)(void *)sa; 677 u_short *splim = sp + ((sa->sa_len + 1) >> 1); 678 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); 679 char *cpe = rt_line + sizeof(rt_line); 680 681 while (++sp < splim && cps < cpe) /* start with sa->sa_data */ 682 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) 683 cps += n; 684 else 685 *cps = '\0'; 686 break; 687 } 688 } 689 return (rt_line); 690} 691 692/* 693 * Return the name of the network whose address is given. 694 * The address is assumed to be that of a net, not a host. 695 */ 696const char * 697netname(struct sockaddr *sa) 698{ 699 struct sockaddr_dl *sdl; 700 int n; 701#ifdef INET 702 struct netent *np = NULL; 703 const char *cp = NULL; 704 u_long i; 705#endif 706 707 switch (sa->sa_family) { 708#ifdef INET 709 case AF_INET: 710 { 711 struct in_addr in; 712 713 in = ((struct sockaddr_in *)(void *)sa)->sin_addr; 714 i = in.s_addr = ntohl(in.s_addr); 715 if (in.s_addr == 0) 716 cp = "default"; 717 else if (!nflag) { 718 np = getnetbyaddr(i, AF_INET); 719 if (np != NULL) 720 cp = np->n_name; 721 } 722#define C(x) (unsigned)((x) & 0xff) 723 if (cp != NULL) 724 strncpy(net_line, cp, sizeof(net_line)); 725 else if ((in.s_addr & 0xffffff) == 0) 726 (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); 727 else if ((in.s_addr & 0xffff) == 0) 728 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), 729 C(in.s_addr >> 16)); 730 else if ((in.s_addr & 0xff) == 0) 731 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), 732 C(in.s_addr >> 16), C(in.s_addr >> 8)); 733 else 734 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), 735 C(in.s_addr >> 16), C(in.s_addr >> 8), 736 C(in.s_addr)); 737#undef C 738 break; 739 } 740#endif 741#ifdef INET6 742 case AF_INET6: 743 { 744 struct sockaddr_in6 sin6; 745 int niflags = 0; 746 747 memset(&sin6, 0, sizeof(sin6)); 748 memcpy(&sin6, sa, sa->sa_len); 749 sin6.sin6_len = sizeof(sin6); 750 sin6.sin6_family = AF_INET6; 751 if (nflag) 752 niflags |= NI_NUMERICHOST; 753 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 754 net_line, sizeof(net_line), NULL, 0, niflags) != 0) 755 strncpy(net_line, "invalid", sizeof(net_line)); 756 757 return(net_line); 758 } 759#endif 760 case AF_LINK: 761 sdl = (struct sockaddr_dl *)(void *)sa; 762 763 if (sdl->sdl_nlen == 0 && 764 sdl->sdl_alen == 0 && 765 sdl->sdl_slen == 0) { 766 n = snprintf(net_line, sizeof(net_line), "link#%d", 767 sdl->sdl_index); 768 if (n > (int)sizeof(net_line)) 769 net_line[0] = '\0'; 770 return (net_line); 771 } else 772 return (link_ntoa(sdl)); 773 break; 774 775 default: 776 { 777 u_short *sp = (u_short *)(void *)sa->sa_data; 778 u_short *splim = sp + ((sa->sa_len + 1)>>1); 779 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); 780 char *cpe = net_line + sizeof(net_line); 781 782 while (sp < splim && cps < cpe) 783 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) 784 cps += n; 785 else 786 *cps = '\0'; 787 break; 788 } 789 } 790 return (net_line); 791} 792 793static void 794set_metric(char *value, int key) 795{ 796 int flag = 0; 797 char *endptr; 798 u_long noval, *valp = &noval; 799 800 switch (key) { 801#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 802 caseof(K_MTU, RTV_MTU, rmx_mtu); 803 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 804 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 805 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 806 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 807 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 808 caseof(K_RTT, RTV_RTT, rmx_rtt); 809 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 810 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 811 } 812 rtm_inits |= flag; 813 if (lockrest || locking) 814 rt_metrics.rmx_locks |= flag; 815 if (locking) 816 locking = 0; 817 errno = 0; 818 *valp = strtol(value, &endptr, 0); 819 if (errno == 0 && *endptr != '\0') 820 errno = EINVAL; 821 if (errno) 822 err(EX_USAGE, "%s", value); 823 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { 824 struct timespec ts; 825 826 clock_gettime(CLOCK_REALTIME_FAST, &ts); 827 *valp += ts.tv_sec; 828 } 829} 830 831#define F_ISHOST 0x01 832#define F_FORCENET 0x02 833#define F_FORCEHOST 0x04 834#define F_PROXY 0x08 835#define F_INTERFACE 0x10 836 837static void 838newroute(int argc, char **argv) 839{ 840 struct sigaction sa; 841 struct fibl *fl; 842 char *cmd; 843 const char *dest, *gateway, *errmsg; 844 int key, error, flags, nrflags, fibnum; 845 846 if (uid != 0 && !debugonly && !tflag) 847 errx(EX_NOPERM, "must be root to alter routing table"); 848 dest = NULL; 849 gateway = NULL; 850 flags = RTF_STATIC; 851 nrflags = 0; 852 TAILQ_INIT(&fibl_head); 853 854 sigemptyset(&sa.sa_mask); 855 sa.sa_flags = 0; 856 sa.sa_handler = stopit; 857 if (sigaction(SIGALRM, &sa, 0) == -1) 858 warn("sigaction SIGALRM"); 859 860 cmd = argv[0]; 861#ifdef WITHOUT_NETLINK 862 if (*cmd != 'g' && *cmd != 's') 863 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 864#endif 865 while (--argc > 0) { 866 if (**(++argv)== '-') { 867 switch (key = keyword(1 + *argv)) { 868 case K_LINK: 869 af = AF_LINK; 870 aflen = sizeof(struct sockaddr_dl); 871 break; 872#ifdef INET 873 case K_4: 874 case K_INET: 875 af = AF_INET; 876 aflen = sizeof(struct sockaddr_in); 877 break; 878#endif 879#ifdef INET6 880 case K_6: 881 case K_INET6: 882 af = AF_INET6; 883 aflen = sizeof(struct sockaddr_in6); 884 break; 885#endif 886 case K_SA: 887 af = PF_ROUTE; 888 aflen = sizeof(struct sockaddr_storage); 889 break; 890 case K_IFACE: 891 case K_INTERFACE: 892 nrflags |= F_INTERFACE; 893 break; 894 case K_NOSTATIC: 895 flags &= ~RTF_STATIC; 896 break; 897 case K_LOCK: 898 locking = 1; 899 break; 900 case K_LOCKREST: 901 lockrest = 1; 902 break; 903 case K_HOST: 904 nrflags |= F_FORCEHOST; 905 break; 906 case K_REJECT: 907 flags |= RTF_REJECT; 908 break; 909 case K_BLACKHOLE: 910 flags |= RTF_BLACKHOLE; 911 break; 912 case K_PROTO1: 913 flags |= RTF_PROTO1; 914 break; 915 case K_PROTO2: 916 flags |= RTF_PROTO2; 917 break; 918 case K_PROXY: 919 nrflags |= F_PROXY; 920 break; 921 case K_XRESOLVE: 922 flags |= RTF_XRESOLVE; 923 break; 924 case K_STATIC: 925 flags |= RTF_STATIC; 926 break; 927 case K_STICKY: 928 flags |= RTF_STICKY; 929 break; 930 case K_NOSTICK: 931 flags &= ~RTF_STICKY; 932 break; 933 case K_FIB: 934 if (!--argc) 935 usage(NULL); 936 error = fiboptlist_csv(*++argv, &fibl_head); 937 if (error) 938 errx(EX_USAGE, 939 "invalid fib number: %s", *argv); 940 break; 941 case K_IFA: 942 if (!--argc) 943 usage(NULL); 944 getaddr(RTAX_IFA, *++argv, nrflags); 945 break; 946 case K_IFP: 947 if (!--argc) 948 usage(NULL); 949 getaddr(RTAX_IFP, *++argv, nrflags); 950 break; 951 case K_GENMASK: 952 if (!--argc) 953 usage(NULL); 954 getaddr(RTAX_GENMASK, *++argv, nrflags); 955 break; 956 case K_GATEWAY: 957 if (!--argc) 958 usage(NULL); 959 getaddr(RTAX_GATEWAY, *++argv, nrflags); 960 gateway = *argv; 961 break; 962 case K_DST: 963 if (!--argc) 964 usage(NULL); 965 if (getaddr(RTAX_DST, *++argv, nrflags)) 966 nrflags |= F_ISHOST; 967 dest = *argv; 968 break; 969 case K_NETMASK: 970 if (!--argc) 971 usage(NULL); 972 getaddr(RTAX_NETMASK, *++argv, nrflags); 973 /* FALLTHROUGH */ 974 case K_NET: 975 nrflags |= F_FORCENET; 976 break; 977 case K_PREFIXLEN: 978 if (!--argc) 979 usage(NULL); 980 if (prefixlen(*++argv) == -1) { 981 nrflags &= ~F_FORCENET; 982 nrflags |= F_ISHOST; 983 } else { 984 nrflags |= F_FORCENET; 985 nrflags &= ~F_ISHOST; 986 } 987 break; 988 case K_MTU: 989 case K_HOPCOUNT: 990 case K_EXPIRE: 991 case K_RECVPIPE: 992 case K_SENDPIPE: 993 case K_SSTHRESH: 994 case K_RTT: 995 case K_RTTVAR: 996 case K_WEIGHT: 997 if (!--argc) 998 usage(NULL); 999 set_metric(*++argv, key); 1000 break; 1001 default: 1002 usage(1+*argv); 1003 } 1004 } else { 1005 if ((rtm_addrs & RTA_DST) == 0) { 1006 dest = *argv; 1007 if (getaddr(RTAX_DST, *argv, nrflags)) 1008 nrflags |= F_ISHOST; 1009 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 1010 gateway = *argv; 1011 getaddr(RTAX_GATEWAY, *argv, nrflags); 1012 } else { 1013 getaddr(RTAX_NETMASK, *argv, nrflags); 1014 nrflags |= F_FORCENET; 1015 } 1016 } 1017 } 1018 1019 /* Do some sanity checks on resulting request */ 1020 if (so[RTAX_DST].ss_len == 0) { 1021 warnx("destination parameter required"); 1022 usage(NULL); 1023 } 1024 1025 if (so[RTAX_NETMASK].ss_len != 0 && 1026 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { 1027 warnx("destination and netmask family need to be the same"); 1028 usage(NULL); 1029 } 1030 1031 if (nrflags & F_FORCEHOST) { 1032 nrflags |= F_ISHOST; 1033#ifdef INET6 1034 if (af == AF_INET6) { 1035 rtm_addrs &= ~RTA_NETMASK; 1036 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); 1037 } 1038#endif 1039 } 1040 if (nrflags & F_FORCENET) 1041 nrflags &= ~F_ISHOST; 1042 flags |= RTF_UP; 1043 if (nrflags & F_ISHOST) 1044 flags |= RTF_HOST; 1045 if ((nrflags & F_INTERFACE) == 0) 1046 flags |= RTF_GATEWAY; 1047 if (nrflags & F_PROXY) 1048 flags |= RTF_ANNOUNCE; 1049 if (dest == NULL) 1050 dest = ""; 1051 if (gateway == NULL) 1052 gateway = ""; 1053 1054 if (TAILQ_EMPTY(&fibl_head)) { 1055 error = fiboptlist_csv("default", &fibl_head); 1056 if (error) 1057 errx(EX_OSERR, "fiboptlist_csv failed."); 1058 } 1059 error = 0; 1060 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1061 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); 1062 if (fl->fl_error) 1063 fl->fl_errno = errno; 1064 error += fl->fl_error; 1065 } 1066 if (*cmd == 'g' || *cmd == 's') 1067 exit(error); 1068 1069 error = 0; 1070 if (!qflag) { 1071 fibnum = 0; 1072 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1073 if (fl->fl_error == 0) 1074 fibnum++; 1075 } 1076 if (fibnum > 0) { 1077 int firstfib = 1; 1078 1079 printf("%s %s %s", cmd, 1080 (nrflags & F_ISHOST) ? "host" : "net", dest); 1081 if (*gateway) 1082 printf(": gateway %s", gateway); 1083 1084 if (numfibs > 1) { 1085 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1086 if (fl->fl_error == 0 1087 && fl->fl_num >= 0) { 1088 if (firstfib) { 1089 printf(" fib "); 1090 firstfib = 0; 1091 } 1092 printf("%d", fl->fl_num); 1093 if (fibnum-- > 1) 1094 printf(","); 1095 } 1096 } 1097 } 1098 printf("\n"); 1099 } 1100 } 1101 1102 fibnum = 0; 1103 TAILQ_FOREACH(fl, &fibl_head, fl_next) { 1104 if (fl->fl_error != 0) { 1105 error = 1; 1106 if (!qflag) { 1107 printf("%s %s %s", cmd, (nrflags & F_ISHOST) 1108 ? "host" : "net", dest); 1109 if (*gateway) 1110 printf(": gateway %s", gateway); 1111 1112 if (fl->fl_num >= 0) 1113 printf(" fib %d", fl->fl_num); 1114 1115 switch (fl->fl_errno) { 1116 case ESRCH: 1117 errmsg = "not in table"; 1118 break; 1119 case EBUSY: 1120 errmsg = "entry in use"; 1121 break; 1122 case ENOBUFS: 1123 errmsg = "not enough memory"; 1124 break; 1125 case EADDRINUSE: 1126 /* 1127 * handle recursion avoidance 1128 * in rt_setgate() 1129 */ 1130 errmsg = "gateway uses the same route"; 1131 break; 1132 case EEXIST: 1133 errmsg = "route already in table"; 1134 break; 1135 default: 1136 errmsg = strerror(fl->fl_errno); 1137 break; 1138 } 1139 printf(": %s\n", errmsg); 1140 } 1141 } 1142 } 1143 exit(error); 1144} 1145 1146static int 1147newroute_fib(int fib, char *cmd, int flags) 1148{ 1149 int error; 1150 1151 error = set_sofib(fib); 1152 if (error) { 1153 warn("fib number %d is ignored", fib); 1154 return (error); 1155 } 1156 1157 error = rtmsg(*cmd, flags, fib); 1158 return (error); 1159} 1160 1161#ifdef INET 1162static void 1163inet_makemask(struct sockaddr_in *sin_mask, u_long bits) 1164{ 1165 u_long mask = 0; 1166 1167 rtm_addrs |= RTA_NETMASK; 1168 1169 if (bits != 0) 1170 mask = 0xffffffff << (32 - bits); 1171 1172 sin_mask->sin_addr.s_addr = htonl(mask); 1173 sin_mask->sin_len = sizeof(struct sockaddr_in); 1174 sin_mask->sin_family = AF_INET; 1175} 1176#endif 1177 1178#ifdef INET6 1179/* 1180 * XXX the function may need more improvement... 1181 */ 1182static int 1183inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 1184{ 1185 1186 if (plen == NULL) { 1187 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1188 sin6->sin6_scope_id == 0) 1189 plen = "0"; 1190 } 1191 1192 if (plen == NULL || strcmp(plen, "128") == 0) 1193 return (1); 1194 rtm_addrs |= RTA_NETMASK; 1195 prefixlen(plen); 1196 return (0); 1197} 1198#endif 1199 1200/* 1201 * Interpret an argument as a network address of some kind, 1202 * returning 1 if a host address, 0 if a network address. 1203 */ 1204static int 1205getaddr(int idx, char *str, int nrflags) 1206{ 1207 struct sockaddr *sa; 1208#if defined(INET) 1209 struct sockaddr_in *sin; 1210 struct hostent *hp; 1211 char *q; 1212#elif defined(INET6) 1213 char *q; 1214#endif 1215 1216 if (idx < 0 || idx >= RTAX_MAX) 1217 usage("internal error"); 1218 if (af == 0) { 1219#if defined(INET) 1220 af = AF_INET; 1221 aflen = sizeof(struct sockaddr_in); 1222#elif defined(INET6) 1223 af = AF_INET6; 1224 aflen = sizeof(struct sockaddr_in6); 1225#else 1226 af = AF_LINK; 1227 aflen = sizeof(struct sockaddr_dl); 1228#endif 1229 } 1230 rtm_addrs |= (1 << idx); 1231 sa = (struct sockaddr *)&so[idx]; 1232 sa->sa_family = af; 1233 sa->sa_len = aflen; 1234 1235 switch (idx) { 1236 case RTAX_GATEWAY: 1237 if (nrflags & F_INTERFACE) { 1238 struct ifaddrs *ifap, *ifa; 1239 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; 1240 struct sockaddr_dl *sdl = NULL; 1241 1242 if (getifaddrs(&ifap)) 1243 err(EX_OSERR, "getifaddrs"); 1244 1245 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1246 if (ifa->ifa_addr->sa_family != AF_LINK) 1247 continue; 1248 1249 if (strcmp(str, ifa->ifa_name) != 0) 1250 continue; 1251 1252 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; 1253 } 1254 /* If we found it, then use it */ 1255 if (sdl != NULL) { 1256 /* 1257 * Note that we need to copy before calling 1258 * freeifaddrs(). 1259 */ 1260 memcpy(sdl0, sdl, sdl->sdl_len); 1261 } 1262 freeifaddrs(ifap); 1263 if (sdl != NULL) 1264 return(1); 1265 else 1266 errx(EX_DATAERR, 1267 "interface '%s' does not exist", str); 1268 } 1269 break; 1270 case RTAX_IFP: 1271 sa->sa_family = AF_LINK; 1272 break; 1273 } 1274 if (strcmp(str, "default") == 0) { 1275 /* 1276 * Default is net 0.0.0.0/0 1277 */ 1278 switch (idx) { 1279 case RTAX_DST: 1280 nrflags |= F_FORCENET; 1281 getaddr(RTAX_NETMASK, str, nrflags); 1282 break; 1283 } 1284 return (0); 1285 } 1286 switch (sa->sa_family) { 1287#ifdef INET6 1288 case AF_INET6: 1289 { 1290 struct addrinfo hints, *res; 1291 int ecode; 1292 1293 q = NULL; 1294 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) 1295 *q = '\0'; 1296 memset(&hints, 0, sizeof(hints)); 1297 hints.ai_family = sa->sa_family; 1298 hints.ai_socktype = SOCK_DGRAM; 1299 ecode = getaddrinfo(str, NULL, &hints, &res); 1300 if (ecode != 0 || res->ai_family != AF_INET6 || 1301 res->ai_addrlen != sizeof(struct sockaddr_in6)) 1302 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); 1303 memcpy(sa, res->ai_addr, res->ai_addrlen); 1304 freeaddrinfo(res); 1305 if (q != NULL) 1306 *q++ = '/'; 1307 if (idx == RTAX_DST) 1308 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); 1309 return (0); 1310 } 1311#endif /* INET6 */ 1312 case AF_LINK: 1313 link_addr(str, (struct sockaddr_dl *)(void *)sa); 1314 return (1); 1315 1316 case PF_ROUTE: 1317 sockaddr(str, sa, sizeof(struct sockaddr_storage)); 1318 return (1); 1319#ifdef INET 1320 case AF_INET: 1321#endif 1322 default: 1323 break; 1324 } 1325 1326#ifdef INET 1327 sin = (struct sockaddr_in *)(void *)sa; 1328 1329 q = strchr(str,'/'); 1330 if (q != NULL && idx == RTAX_DST) { 1331 /* A.B.C.D/NUM */ 1332 struct sockaddr_in *mask; 1333 uint32_t mask_bits; 1334 1335 *q = '\0'; 1336 if (inet_aton(str, &sin->sin_addr) == 0) 1337 errx(EX_NOHOST, "bad address: %s", str); 1338 1339 int masklen = strtol(q + 1, NULL, 10); 1340 if (masklen < 0 || masklen > 32) 1341 errx(EX_NOHOST, "bad mask length: %s", q + 1); 1342 1343 inet_makemask((struct sockaddr_in *)&so[RTAX_NETMASK],masklen); 1344 1345 /* 1346 * Check for bogus destination such as "10/8"; heuristic is 1347 * that there are bits set in the host part, and no dot 1348 * is present. 1349 */ 1350 mask = ((struct sockaddr_in *) &so[RTAX_NETMASK]); 1351 mask_bits = ntohl(mask->sin_addr.s_addr); 1352 if ((ntohl(sin->sin_addr.s_addr) & ~mask_bits) != 0 && 1353 strchr(str, '.') == NULL) 1354 errx(EX_NOHOST, 1355 "malformed address, bits set after mask;" 1356 " %s means %s", 1357 str, inet_ntoa(sin->sin_addr)); 1358 return (0); 1359 } 1360 if (inet_aton(str, &sin->sin_addr) != 0) 1361 return (1); 1362 1363 hp = gethostbyname(str); 1364 if (hp != NULL) { 1365 sin->sin_family = hp->h_addrtype; 1366 memmove((char *)&sin->sin_addr, hp->h_addr, 1367 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 1368 return (1); 1369 } 1370#endif 1371 errx(EX_NOHOST, "bad address: %s", str); 1372} 1373 1374static int 1375prefixlen(const char *str) 1376{ 1377 int len = atoi(str), q, r; 1378 int max; 1379 char *p; 1380 1381 rtm_addrs |= RTA_NETMASK; 1382 switch (af) { 1383#ifdef INET6 1384 case AF_INET6: 1385 { 1386 struct sockaddr_in6 *sin6 = 1387 (struct sockaddr_in6 *)&so[RTAX_NETMASK]; 1388 1389 max = 128; 1390 p = (char *)&sin6->sin6_addr; 1391 sin6->sin6_family = AF_INET6; 1392 sin6->sin6_len = sizeof(*sin6); 1393 break; 1394 } 1395#endif 1396#ifdef INET 1397 case AF_INET: 1398 { 1399 struct sockaddr_in *sin = 1400 (struct sockaddr_in *)&so[RTAX_NETMASK]; 1401 1402 max = 32; 1403 p = (char *)&sin->sin_addr; 1404 sin->sin_family = AF_INET; 1405 sin->sin_len = sizeof(*sin); 1406 break; 1407 } 1408#endif 1409 default: 1410 errx(EX_OSERR, "prefixlen not supported in this af"); 1411 } 1412 1413 if (len < 0 || max < len) 1414 errx(EX_USAGE, "%s: invalid prefixlen", str); 1415 1416 q = len >> 3; 1417 r = len & 7; 1418 memset((void *)p, 0, max / 8); 1419 if (q > 0) 1420 memset((void *)p, 0xff, q); 1421 if (r > 0) 1422 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1423 if (len == max) 1424 return (-1); 1425 else 1426 return (len); 1427} 1428 1429static void 1430interfaces(void) 1431{ 1432 size_t needed; 1433 int mib[6]; 1434 char *buf, *lim, *next, count = 0; 1435 struct rt_msghdr *rtm; 1436 1437retry2: 1438 mib[0] = CTL_NET; 1439 mib[1] = PF_ROUTE; 1440 mib[2] = 0; /* protocol */ 1441 mib[3] = AF_UNSPEC; 1442 mib[4] = NET_RT_IFLIST; 1443 mib[5] = 0; /* no flags */ 1444 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 1445 err(EX_OSERR, "route-sysctl-estimate"); 1446 if ((buf = malloc(needed)) == NULL) 1447 errx(EX_OSERR, "malloc failed"); 1448 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { 1449 if (errno == ENOMEM && count++ < 10) { 1450 warnx("Routing table grew, retrying"); 1451 sleep(1); 1452 free(buf); 1453 goto retry2; 1454 } 1455 err(EX_OSERR, "actual retrieval of interface table"); 1456 } 1457 lim = buf + needed; 1458 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1459 rtm = (struct rt_msghdr *)(void *)next; 1460 print_rtmsg(rtm, rtm->rtm_msglen); 1461 } 1462 free(buf); 1463} 1464 1465static void 1466monitor(int argc, char *argv[]) 1467{ 1468 int fib, error; 1469 char *endptr; 1470 1471 fib = defaultfib; 1472 while (argc > 1) { 1473 argc--; 1474 argv++; 1475 if (**argv != '-') 1476 usage(*argv); 1477 switch (keyword(*argv + 1)) { 1478 case K_FIB: 1479 if (!--argc) 1480 usage(*argv); 1481 errno = 0; 1482 fib = strtol(*++argv, &endptr, 0); 1483 if (errno == 0) { 1484 if (*endptr != '\0' || 1485 fib < 0 || 1486 (numfibs != -1 && fib > numfibs - 1)) 1487 errno = EINVAL; 1488 } 1489 if (errno) 1490 errx(EX_USAGE, "invalid fib number: %s", *argv); 1491 break; 1492 default: 1493 usage(*argv); 1494 } 1495 } 1496 error = set_sofib(fib); 1497 if (error) 1498 errx(EX_USAGE, "invalid fib number: %d", fib); 1499 1500 verbose = 1; 1501 if (debugonly) { 1502 interfaces(); 1503 exit(0); 1504 } 1505#ifdef WITHOUT_NETLINK 1506 monitor_rtsock(); 1507#else 1508 monitor_nl(fib); 1509#endif 1510} 1511 1512#ifdef WITHOUT_NETLINK 1513static void 1514monitor_rtsock(void) 1515{ 1516 char msg[2048]; 1517 int n; 1518 1519#ifdef SO_RERROR 1520 n = 1; 1521 if (setsockopt(s, SOL_SOCKET, SO_RERROR, &n, sizeof(n)) == -1) 1522 warn("SO_RERROR"); 1523#endif 1524 1525 for (;;) { 1526 time_t now; 1527 n = read(s, msg, sizeof(msg)); 1528 if (n == -1) { 1529 warn("read"); 1530 continue; 1531 } 1532 now = time(NULL); 1533 (void)printf("\ngot message of size %d on %s", n, ctime(&now)); 1534 print_rtmsg((struct rt_msghdr *)(void *)msg, n); 1535 } 1536} 1537#endif 1538 1539static int 1540rtmsg(int cmd, int flags, int fib) 1541{ 1542 errno = 0; 1543 if (cmd == 'a') 1544 cmd = RTM_ADD; 1545 else if (cmd == 'c') 1546 cmd = RTM_CHANGE; 1547 else if (cmd == 'g' || cmd == 's') { 1548 cmd = RTM_GET; 1549 if (so[RTAX_IFP].ss_family == 0) { 1550 so[RTAX_IFP].ss_family = AF_LINK; 1551 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); 1552 rtm_addrs |= RTA_IFP; 1553 } 1554 } else { 1555 cmd = RTM_DELETE; 1556 flags |= RTF_PINNED; 1557 } 1558#ifdef WITHOUT_NETLINK 1559 return (rtmsg_rtsock(cmd, flags, fib)); 1560#else 1561 errno = rtmsg_nl(cmd, flags, fib, rtm_addrs, so, &rt_metrics); 1562 return (errno == 0 ? 0 : -1); 1563#endif 1564} 1565 1566#ifdef WITHOUT_NETLINK 1567static int 1568rtmsg_rtsock(int cmd, int flags, int fib) 1569{ 1570 int rlen; 1571 char *cp = m_rtmsg.m_space; 1572 int l; 1573 1574 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1575 1576#define NEXTADDR(w, u) \ 1577 if (rtm_addrs & (w)) { \ 1578 l = SA_SIZE(&(u)); \ 1579 memmove(cp, (char *)&(u), l); \ 1580 cp += l; \ 1581 if (verbose) \ 1582 sodump((struct sockaddr *)&(u), #w); \ 1583 } 1584 1585#define rtm m_rtmsg.m_rtm 1586 rtm.rtm_type = cmd; 1587 rtm.rtm_flags = flags; 1588 rtm.rtm_version = RTM_VERSION; 1589 rtm.rtm_seq = ++rtm_seq; 1590 rtm.rtm_addrs = rtm_addrs; 1591 rtm.rtm_rmx = rt_metrics; 1592 rtm.rtm_inits = rtm_inits; 1593 1594 NEXTADDR(RTA_DST, so[RTAX_DST]); 1595 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); 1596 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); 1597 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); 1598 NEXTADDR(RTA_IFP, so[RTAX_IFP]); 1599 NEXTADDR(RTA_IFA, so[RTAX_IFA]); 1600 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1601 if (verbose) 1602 print_rtmsg(&rtm, l); 1603 if (debugonly) 1604 return (0); 1605 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1606 switch (errno) { 1607 case EPERM: 1608 err(1, "writing to routing socket"); 1609 break; 1610 case ESRCH: 1611 warnx("route has not been found"); 1612 break; 1613 case EEXIST: 1614 /* Handled by newroute() */ 1615 break; 1616 default: 1617 warn("writing to routing socket"); 1618 } 1619 return (-1); 1620 } 1621 if (cmd == RTM_GET) { 1622 stop_read = 0; 1623 alarm(READ_TIMEOUT); 1624 do { 1625 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1626 } while (l > 0 && stop_read == 0 && 1627 (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq || 1628 rtm.rtm_pid != pid)); 1629 if (stop_read != 0) { 1630 warnx("read from routing socket timed out"); 1631 return (-1); 1632 } else 1633 alarm(0); 1634 if (l < 0) 1635 warn("read from routing socket"); 1636 else 1637 print_getmsg(&rtm, l, fib); 1638 } 1639#undef rtm 1640 return (0); 1641} 1642#endif 1643 1644static const char *const msgtypes[] = { 1645 "", 1646 "RTM_ADD: Add Route", 1647 "RTM_DELETE: Delete Route", 1648 "RTM_CHANGE: Change Metrics or flags", 1649 "RTM_GET: Report Metrics", 1650 "RTM_LOSING: Kernel Suspects Partitioning", 1651 "RTM_REDIRECT: Told to use different route", 1652 "RTM_MISS: Lookup failed on this address", 1653 "RTM_LOCK: fix specified metrics", 1654 "RTM_OLDADD: caused by SIOCADDRT", 1655 "RTM_OLDDEL: caused by SIOCDELRT", 1656 "RTM_RESOLVE: Route created by cloning", 1657 "RTM_NEWADDR: address being added to iface", 1658 "RTM_DELADDR: address being removed from iface", 1659 "RTM_IFINFO: iface status change", 1660 "RTM_NEWMADDR: new multicast group membership on iface", 1661 "RTM_DELMADDR: multicast group membership removed from iface", 1662 "RTM_IFANNOUNCE: interface arrival/departure", 1663 "RTM_IEEE80211: IEEE 802.11 wireless event", 1664}; 1665 1666static const char metricnames[] = 1667 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1668 "\1mtu"; 1669const char routeflags[] = 1670 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1671 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1672 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1673 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1674static const char ifnetflags[] = 1675 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1676 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1677 "\017LINK2\020MULTICAST"; 1678static const char addrnames[] = 1679 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1680 1681static const char errfmt[] = 1682 "\n%s: truncated route message, only %zu bytes left\n"; 1683 1684static void 1685print_rtmsg(struct rt_msghdr *rtm, size_t msglen) 1686{ 1687 struct if_msghdr *ifm; 1688 struct ifa_msghdr *ifam; 1689#ifdef RTM_NEWMADDR 1690 struct ifma_msghdr *ifmam; 1691#endif 1692 struct if_announcemsghdr *ifan; 1693 const char *state; 1694 1695 if (verbose == 0) 1696 return; 1697 if (rtm->rtm_version != RTM_VERSION) { 1698 (void)printf("routing message version %d not understood\n", 1699 rtm->rtm_version); 1700 return; 1701 } 1702 if (rtm->rtm_type < nitems(msgtypes)) 1703 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1704 else 1705 (void)printf("unknown type %d: ", rtm->rtm_type); 1706 (void)printf("len %d, ", rtm->rtm_msglen); 1707 1708#define REQUIRE(x) do { \ 1709 if (msglen < sizeof(x)) \ 1710 goto badlen; \ 1711 else \ 1712 msglen -= sizeof(x); \ 1713 } while (0) 1714 1715 switch (rtm->rtm_type) { 1716 case RTM_IFINFO: 1717 REQUIRE(struct if_msghdr); 1718 ifm = (struct if_msghdr *)rtm; 1719 (void)printf("if# %d, ", ifm->ifm_index); 1720 switch (ifm->ifm_data.ifi_link_state) { 1721 case LINK_STATE_DOWN: 1722 state = "down"; 1723 break; 1724 case LINK_STATE_UP: 1725 state = "up"; 1726 break; 1727 default: 1728 state = "unknown"; 1729 break; 1730 } 1731 (void)printf("link: %s, flags:", state); 1732 printb(ifm->ifm_flags, ifnetflags); 1733 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); 1734 break; 1735 case RTM_NEWADDR: 1736 case RTM_DELADDR: 1737 REQUIRE(struct ifa_msghdr); 1738 ifam = (struct ifa_msghdr *)rtm; 1739 (void)printf("metric %d, flags:", ifam->ifam_metric); 1740 printb(ifam->ifam_flags, routeflags); 1741 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); 1742 break; 1743#ifdef RTM_NEWMADDR 1744 case RTM_NEWMADDR: 1745 case RTM_DELMADDR: 1746 REQUIRE(struct ifma_msghdr); 1747 ifmam = (struct ifma_msghdr *)rtm; 1748 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); 1749 break; 1750#endif 1751 case RTM_IFANNOUNCE: 1752 REQUIRE(struct if_announcemsghdr); 1753 ifan = (struct if_announcemsghdr *)rtm; 1754 (void)printf("if# %d, what: ", ifan->ifan_index); 1755 switch (ifan->ifan_what) { 1756 case IFAN_ARRIVAL: 1757 (void)printf("arrival"); 1758 break; 1759 case IFAN_DEPARTURE: 1760 printf("departure"); 1761 break; 1762 default: 1763 printf("#%d", ifan->ifan_what); 1764 break; 1765 } 1766 printf("\n"); 1767 fflush(stdout); 1768 break; 1769 1770 default: 1771 if (rtm->rtm_type <= RTM_RESOLVE) { 1772 printf("pid: %ld, seq %d, errno %d, flags:", 1773 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1774 printb(rtm->rtm_flags, routeflags); 1775 pmsg_common(rtm, msglen); 1776 } else 1777 printf("type: %u, len: %zu\n", rtm->rtm_type, msglen); 1778 } 1779 1780 return; 1781 1782badlen: 1783 (void)printf(errfmt, __func__, msglen); 1784#undef REQUIRE 1785} 1786 1787static void 1788print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) 1789{ 1790 struct sockaddr *sp[RTAX_MAX]; 1791 struct timespec ts; 1792 char *cp; 1793 int i; 1794 1795 memset(sp, 0, sizeof(sp)); 1796 (void)printf(" route to: %s\n", 1797 routename((struct sockaddr *)&so[RTAX_DST])); 1798 if (rtm->rtm_version != RTM_VERSION) { 1799 warnx("routing message version %d not understood", 1800 rtm->rtm_version); 1801 return; 1802 } 1803 if (rtm->rtm_msglen > msglen) { 1804 warnx("message length mismatch, in packet %d, returned %d", 1805 rtm->rtm_msglen, msglen); 1806 return; 1807 } 1808 if (rtm->rtm_errno) { 1809 errno = rtm->rtm_errno; 1810 warn("message indicates error %d", errno); 1811 return; 1812 } 1813 cp = ((char *)(rtm + 1)); 1814 for (i = 0; i < RTAX_MAX; i++) 1815 if (rtm->rtm_addrs & (1 << i)) { 1816 sp[i] = (struct sockaddr *)cp; 1817 cp += SA_SIZE((struct sockaddr *)cp); 1818 } 1819 if ((rtm->rtm_addrs & RTA_IFP) && 1820 (sp[RTAX_IFP]->sa_family != AF_LINK || 1821 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) 1822 sp[RTAX_IFP] = NULL; 1823 if (sp[RTAX_DST]) 1824 (void)printf("destination: %s\n", routename(sp[RTAX_DST])); 1825 if (sp[RTAX_NETMASK]) 1826 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); 1827 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) 1828 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); 1829 if (fib >= 0) 1830 (void)printf(" fib: %u\n", (unsigned int)fib); 1831 if (sp[RTAX_IFP]) 1832 (void)printf(" interface: %.*s\n", 1833 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, 1834 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); 1835 (void)printf(" flags: "); 1836 printb(rtm->rtm_flags, routeflags); 1837 1838#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1839#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1840 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", 1841 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); 1842 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1843 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1844 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1845 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1846 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1847 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1848 if (rtm->rtm_rmx.rmx_expire > 0) 1849 clock_gettime(CLOCK_REALTIME_FAST, &ts); 1850 else 1851 ts.tv_sec = 0; 1852 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), 1853 lock(EXPIRE)); 1854#undef lock 1855#undef msec 1856#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1857 if (verbose) 1858 pmsg_common(rtm, msglen); 1859 else if (rtm->rtm_addrs &~ RTA_IGN) { 1860 (void)printf("sockaddrs: "); 1861 printb(rtm->rtm_addrs, addrnames); 1862 putchar('\n'); 1863 } 1864#undef RTA_IGN 1865} 1866 1867static void 1868pmsg_common(struct rt_msghdr *rtm, size_t msglen) 1869{ 1870 1871 (void)printf("\nlocks: "); 1872 printb(rtm->rtm_rmx.rmx_locks, metricnames); 1873 (void)printf(" inits: "); 1874 printb(rtm->rtm_inits, metricnames); 1875 if (msglen > sizeof(struct rt_msghdr)) 1876 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, 1877 msglen - sizeof(struct rt_msghdr)); 1878 else 1879 (void)fflush(stdout); 1880} 1881 1882static void 1883pmsg_addrs(char *cp, int addrs, size_t len) 1884{ 1885 struct sockaddr *sa; 1886 int i; 1887 1888 if (addrs == 0) { 1889 (void)putchar('\n'); 1890 return; 1891 } 1892 (void)printf("\nsockaddrs: "); 1893 printb(addrs, addrnames); 1894 putchar('\n'); 1895 for (i = 0; i < RTAX_MAX; i++) 1896 if (addrs & (1 << i)) { 1897 sa = (struct sockaddr *)cp; 1898 if (len == 0 || len < SA_SIZE(sa)) { 1899 (void)printf(errfmt, __func__, len); 1900 break; 1901 } 1902 (void)printf(" %s", routename(sa)); 1903 len -= SA_SIZE(sa); 1904 cp += SA_SIZE(sa); 1905 } 1906 (void)putchar('\n'); 1907 (void)fflush(stdout); 1908} 1909 1910void 1911printb(int b, const char *str) 1912{ 1913 int i; 1914 int gotsome = 0; 1915 1916 if (b == 0) 1917 return; 1918 while ((i = *str++) != 0) { 1919 if (b & (1 << (i-1))) { 1920 if (gotsome == 0) 1921 i = '<'; 1922 else 1923 i = ','; 1924 putchar(i); 1925 gotsome = 1; 1926 for (; (i = *str) > 32; str++) 1927 putchar(i); 1928 } else 1929 while (*str > 32) 1930 str++; 1931 } 1932 if (gotsome) 1933 putchar('>'); 1934} 1935 1936int 1937keyword(const char *cp) 1938{ 1939 const struct keytab *kt = keywords; 1940 1941 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1942 kt++; 1943 return (kt->kt_i); 1944} 1945 1946static void 1947sodump(struct sockaddr *sa, const char *which) 1948{ 1949#ifdef INET6 1950 char nbuf[INET6_ADDRSTRLEN]; 1951#endif 1952 1953 switch (sa->sa_family) { 1954 case AF_LINK: 1955 (void)printf("%s: link %s; ", which, 1956 link_ntoa((struct sockaddr_dl *)(void *)sa)); 1957 break; 1958#ifdef INET 1959 case AF_INET: 1960 (void)printf("%s: inet %s; ", which, 1961 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); 1962 break; 1963#endif 1964#ifdef INET6 1965 case AF_INET6: 1966 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, 1967 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, 1968 sizeof(nbuf))); 1969 break; 1970#endif 1971 } 1972 (void)fflush(stdout); 1973} 1974 1975/* States*/ 1976#define VIRGIN 0 1977#define GOTONE 1 1978#define GOTTWO 2 1979/* Inputs */ 1980#define DIGIT (4*0) 1981#define END (4*1) 1982#define DELIM (4*2) 1983 1984static void 1985sockaddr(char *addr, struct sockaddr *sa, size_t size) 1986{ 1987 char *cp = (char *)sa; 1988 char *cplim = cp + size; 1989 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1990 1991 memset(cp, 0, size); 1992 cp++; 1993 do { 1994 if ((*addr >= '0') && (*addr <= '9')) { 1995 new = *addr - '0'; 1996 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1997 new = *addr - 'a' + 10; 1998 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1999 new = *addr - 'A' + 10; 2000 } else if (*addr == '\0') 2001 state |= END; 2002 else 2003 state |= DELIM; 2004 addr++; 2005 switch (state /* | INPUT */) { 2006 case GOTTWO | DIGIT: 2007 *cp++ = byte; /*FALLTHROUGH*/ 2008 case VIRGIN | DIGIT: 2009 state = GOTONE; byte = new; continue; 2010 case GOTONE | DIGIT: 2011 state = GOTTWO; byte = new + (byte << 4); continue; 2012 default: /* | DELIM */ 2013 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2014 case GOTONE | END: 2015 case GOTTWO | END: 2016 *cp++ = byte; /* FALLTHROUGH */ 2017 case VIRGIN | END: 2018 break; 2019 } 2020 break; 2021 } while (cp < cplim); 2022 sa->sa_len = cp - (char *)sa; 2023} 2024