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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1983, 1989, 1991, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)route.c 8.6 (Berkeley) 4/28/95 35 * $FreeBSD: src/sbin/route/route.c,v 1.40.2.11 2003/02/27 23:10:10 ru Exp $ 36 * $DragonFly: src/sbin/route/route.c,v 1.17 2008/07/07 22:02:09 nant Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/file.h> 41 #include <sys/socket.h> 42 #include <sys/ioctl.h> 43 #include <sys/sysctl.h> 44 #include <sys/types.h> 45 46 #include <net/if.h> 47 #include <net/route.h> 48 #include <net/if_dl.h> 49 #include <netinet/in.h> 50 #include <netinet/if_ether.h> 51 #include <netatalk/at.h> 52 #ifdef NS 53 #include <netns/ns.h> 54 #endif 55 #include <arpa/inet.h> 56 #include <netdb.h> 57 58 #include <netproto/mpls/mpls.h> 59 60 #include <ctype.h> 61 #include <err.h> 62 #include <errno.h> 63 #include <paths.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <sysexits.h> 68 #include <unistd.h> 69 #include <ifaddrs.h> 70 71 #include "extern.h" 72 #include "keywords.h" 73 74 union sockunion { 75 struct sockaddr sa; 76 struct sockaddr_in sin; 77 #ifdef INET6 78 struct sockaddr_in6 sin6; 79 #endif 80 struct sockaddr_at sat; 81 #ifdef NS 82 struct sockaddr_ns sns; 83 #endif 84 struct sockaddr_mpls smpls; 85 struct sockaddr_dl sdl; 86 struct sockaddr_inarp sinarp; 87 struct sockaddr_storage ss; /* added to avoid memory overrun */ 88 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp, so_mpls1, 89 so_mpls2, so_mpls3; 90 91 typedef union sockunion *sup; 92 93 int nflag, wflag; 94 int cpuflag = -1; 95 96 static struct ortentry route; 97 static struct rt_metrics rt_metrics; 98 static int pid, rtm_addrs; 99 static int s; 100 static int forcehost, forcenet, af, qflag, tflag; 101 static int iflag, verbose, aflen = sizeof(struct sockaddr_in); 102 static int locking, lockrest, debugonly; 103 static int mplsop, popcount, pushcount, swapcount; 104 static u_long rtm_inits; 105 static uid_t uid; 106 #ifdef NS 107 static short ns_bh[] = {-1,-1,-1}; 108 #endif 109 110 static int atalk_aton(const char *, struct at_addr *); 111 static char *atalk_ntoa(struct at_addr); 112 static void flushroutes(int, char **); 113 static void set_metric(char *, int); 114 static void newroute(int, char **); 115 static void inet_makenetandmask(u_long, struct sockaddr_in *, u_long); 116 static void interfaces(void); 117 static void monitor(void); 118 static void sockaddr(char *, struct sockaddr *); 119 static void sodump(sup, const char *); 120 static void bprintf(FILE *, int, u_char *); 121 static void print_getmsg(struct rt_msghdr *, int); 122 static void print_rtmsg(struct rt_msghdr *, int); 123 static void pmsg_common(struct rt_msghdr *); 124 static void pmsg_addrs(char *, int); 125 static void mask_addr(void); 126 static int getaddr(int, char *, struct hostent **); 127 static int rtmsg(int, int); 128 static int prefixlen(const char *); 129 #ifdef INET6 130 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 131 #endif 132 133 void 134 usage(const char *cp) 135 { 136 if (cp != NULL) 137 warnx("bad keyword: %s", cp); 138 fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n"); 139 exit(EX_USAGE); 140 /* NOTREACHED */ 141 } 142 143 #define ROUNDUP(a) \ 144 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 145 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 146 147 int 148 main(int argc, char **argv) 149 { 150 int ch; 151 152 if (argc < 2) 153 usage(NULL); 154 155 while ((ch = getopt(argc, argv, "c:wnqdtv")) != -1) 156 switch(ch) { 157 case 'c': 158 cpuflag = strtol(optarg, NULL, 0); 159 break; 160 case 'w': 161 wflag = 1; 162 break; 163 case 'n': 164 nflag = 1; 165 break; 166 case 'q': 167 qflag = 1; 168 break; 169 case 'v': 170 verbose = 1; 171 break; 172 case 't': 173 tflag = 1; 174 break; 175 case 'd': 176 debugonly = 1; 177 break; 178 case '?': 179 default: 180 usage(NULL); 181 } 182 argc -= optind; 183 argv += optind; 184 185 pid = getpid(); 186 uid = geteuid(); 187 if (tflag) 188 s = open(_PATH_DEVNULL, O_WRONLY, 0); 189 else 190 s = socket(PF_ROUTE, SOCK_RAW, 0); 191 if (s < 0) 192 err(EX_OSERR, "socket"); 193 if (*argv != NULL) 194 switch (keyword(*argv)) { 195 case K_GET: 196 uid = 0; 197 /* FALLTHROUGH */ 198 199 case K_CHANGE: 200 case K_ADD: 201 case K_DELETE: 202 newroute(argc, argv); 203 /* NOTREACHED */ 204 205 case K_SHOW: 206 show(argc, argv); 207 return(0); 208 209 case K_MONITOR: 210 monitor(); 211 /* NOTREACHED */ 212 213 case K_FLUSH: 214 flushroutes(argc, argv); 215 exit(0); 216 /* NOTREACHED */ 217 } 218 usage(*argv); 219 /* NOTREACHED */ 220 } 221 222 /* 223 * Purge all entries in the routing tables not 224 * associated with network interfaces. 225 */ 226 static void 227 flushroutes(int argc, char **argv) 228 { 229 size_t needed; 230 int mib[7], rlen, seqno; 231 int miblen; 232 char *buf, *next, *lim; 233 struct rt_msghdr *rtm; 234 235 if (uid != 0) { 236 errx(EX_NOPERM, "must be root to alter routing table"); 237 } 238 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 239 if (argc > 1) { 240 argv++; 241 if (argc == 2 && **argv == '-') 242 switch (keyword(*argv + 1)) { 243 case K_INET: 244 af = AF_INET; 245 break; 246 #ifdef INET6 247 case K_INET6: 248 af = AF_INET6; 249 break; 250 #endif 251 case K_ATALK: 252 af = AF_APPLETALK; 253 break; 254 #ifdef NS 255 case K_XNS: 256 af = AF_NS; 257 break; 258 #endif 259 case K_LINK: 260 af = AF_LINK; 261 break; 262 case K_MPLS: 263 af = AF_MPLS; 264 break; 265 default: 266 goto bad; 267 } else 268 bad: usage(*argv); 269 } 270 mib[0] = CTL_NET; 271 mib[1] = PF_ROUTE; 272 mib[2] = 0; /* protocol */ 273 mib[3] = 0; /* wildcard address family */ 274 mib[4] = NET_RT_DUMP; 275 mib[5] = 0; /* no flags */ 276 if (cpuflag >= 0) { 277 mib[6] = cpuflag; 278 miblen = 7; 279 } else { 280 miblen = 6; 281 } 282 if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) 283 err(EX_OSERR, "route-sysctl-estimate"); 284 if ((buf = malloc(needed)) == NULL) 285 errx(EX_OSERR, "malloc failed"); 286 if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) 287 err(EX_OSERR, "route-sysctl-get"); 288 lim = buf + needed; 289 if (verbose) 290 printf("Examining routing table from sysctl\n"); 291 seqno = 0; /* ??? */ 292 for (next = buf; next < lim; next += rtm->rtm_msglen) { 293 rtm = (struct rt_msghdr *)next; 294 if (verbose) 295 print_rtmsg(rtm, rtm->rtm_msglen); 296 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 297 continue; 298 if (af != 0) { 299 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 300 301 if (sa->sa_family != af) 302 continue; 303 } 304 if (debugonly) 305 continue; 306 rtm->rtm_type = RTM_DELETE; 307 rtm->rtm_seq = seqno; 308 rlen = write(s, next, rtm->rtm_msglen); 309 if (rlen < (int)rtm->rtm_msglen) { 310 warn("write to routing socket"); 311 printf("got only %d for rlen\n", rlen); 312 break; 313 } 314 seqno++; 315 if (qflag) 316 continue; 317 if (verbose) { 318 print_rtmsg(rtm, rlen); 319 } else { 320 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 321 if (wflag) { 322 printf("%-20s ", rtm->rtm_flags & RTF_HOST ? 323 routename(sa) : netname(sa)); 324 } else { 325 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 326 routename(sa) : netname(sa)); 327 } 328 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + 329 (char *)sa); 330 if (wflag) { 331 printf("%-20s ", routename(sa)); 332 } else { 333 printf("%-20.20s ", routename(sa)); 334 } 335 printf("done\n"); 336 } 337 } 338 } 339 340 char * 341 routename(struct sockaddr *sa) 342 { 343 const char *cp; 344 static char line[MAXHOSTNAMELEN + 1]; 345 struct hostent *hp; 346 static char domain[MAXHOSTNAMELEN + 1]; 347 static int first = 1; 348 349 if (first) { 350 first = 0; 351 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 352 (cp = strchr(domain, '.'))) { 353 domain[MAXHOSTNAMELEN] = '\0'; 354 strcpy(domain, cp + 1); 355 } else 356 domain[0] = 0; 357 } 358 359 if (sa->sa_len == 0) 360 strcpy(line, "default"); 361 else switch (sa->sa_family) { 362 363 case AF_INET: 364 { struct in_addr in; 365 in = ((struct sockaddr_in *)sa)->sin_addr; 366 367 cp = NULL; 368 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 369 cp = "default"; 370 if (cp == NULL && !nflag) { 371 hp = gethostbyaddr(&in, sizeof(struct in_addr), 372 AF_INET); 373 if (hp != NULL) { 374 char *cptr; 375 cptr = strchr(hp->h_name, '.'); 376 if (cptr != NULL && !wflag && 377 strcmp(cptr + 1, domain) == 0) 378 *cptr = '\0'; 379 cp = hp->h_name; 380 } 381 } 382 if (cp != NULL) { 383 strncpy(line, cp, sizeof(line) - 1); 384 line[sizeof(line) - 1] = '\0'; 385 } else 386 sprintf(line, "%s", inet_ntoa(in)); 387 break; 388 } 389 390 #ifdef INET6 391 case AF_INET6: 392 { 393 struct sockaddr_in6 sin6; /* use static var for safety */ 394 int niflags = 0; 395 #ifdef NI_WITHSCOPEID 396 niflags = NI_WITHSCOPEID; 397 #endif 398 399 memset(&sin6, 0, sizeof(sin6)); 400 memcpy(&sin6, sa, sa->sa_len); 401 sin6.sin6_len = sizeof(struct sockaddr_in6); 402 sin6.sin6_family = AF_INET6; 403 #ifdef __KAME__ 404 if (sa->sa_len == sizeof(struct sockaddr_in6) && 405 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 406 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 407 sin6.sin6_scope_id == 0) { 408 sin6.sin6_scope_id = 409 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 410 sin6.sin6_addr.s6_addr[2] = 0; 411 sin6.sin6_addr.s6_addr[3] = 0; 412 } 413 #endif 414 if (nflag) 415 niflags |= NI_NUMERICHOST; 416 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 417 line, sizeof(line), NULL, 0, niflags) != 0) 418 strncpy(line, "invalid", sizeof(line)); 419 420 return(line); 421 } 422 #endif 423 424 case AF_APPLETALK: 425 snprintf(line, sizeof(line), "atalk %s", 426 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 427 break; 428 429 #ifdef NS 430 case AF_NS: 431 return(ns_print((struct sockaddr_ns *)sa)); 432 #endif 433 434 case AF_LINK: 435 return(link_ntoa((struct sockaddr_dl *)sa)); 436 437 default: 438 { 439 /* 440 * Unknown address family; just render the raw 441 * data in sa->sa_data as hex values. 442 */ 443 uint8_t *sp = (uint8_t *)sa->sa_data; 444 uint8_t *splim = (uint8_t *)sa + sa->sa_len; 445 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 446 char *cpe = line + sizeof(line); 447 448 while (sp < splim && cps < cpe) 449 cps += snprintf(cps, cpe - cps, " %02x", *sp++); 450 break; 451 } 452 } 453 return(line); 454 } 455 456 /* 457 * Return the name of the network whose address is given. 458 * The address is assumed to be that of a net or subnet, not a host. 459 */ 460 char * 461 netname(struct sockaddr *sa) 462 { 463 const char *cp = 0; 464 static char line[MAXHOSTNAMELEN + 1]; 465 struct netent *np = 0; 466 u_long net, mask; 467 u_long i; 468 int subnetshift; 469 470 switch (sa->sa_family) { 471 472 case AF_INET: 473 { struct in_addr in; 474 in = ((struct sockaddr_in *)sa)->sin_addr; 475 476 i = in.s_addr = ntohl(in.s_addr); 477 if (in.s_addr == 0) 478 cp = "default"; 479 else if (!nflag) { 480 if (IN_CLASSA(i)) { 481 mask = IN_CLASSA_NET; 482 subnetshift = 8; 483 } else if (IN_CLASSB(i)) { 484 mask = IN_CLASSB_NET; 485 subnetshift = 8; 486 } else { 487 mask = IN_CLASSC_NET; 488 subnetshift = 4; 489 } 490 /* 491 * If there are more bits than the standard mask 492 * would suggest, subnets must be in use. 493 * Guess at the subnet mask, assuming reasonable 494 * width subnet fields. 495 */ 496 while (in.s_addr &~ mask) 497 mask = (long)mask >> subnetshift; 498 net = in.s_addr & mask; 499 while ((mask & 1) == 0) 500 mask >>= 1, net >>= 1; 501 np = getnetbyaddr(net, AF_INET); 502 if (np != NULL) 503 cp = np->n_name; 504 } 505 #define C(x) (unsigned)((x) & 0xff) 506 if (cp != NULL) 507 strncpy(line, cp, sizeof(line)); 508 else if ((in.s_addr & 0xffffff) == 0) 509 sprintf(line, "%u", C(in.s_addr >> 24)); 510 else if ((in.s_addr & 0xffff) == 0) 511 sprintf(line, "%u.%u", C(in.s_addr >> 24), 512 C(in.s_addr >> 16)); 513 else if ((in.s_addr & 0xff) == 0) 514 sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 515 C(in.s_addr >> 16), C(in.s_addr >> 8)); 516 else 517 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 518 C(in.s_addr >> 16), C(in.s_addr >> 8), 519 C(in.s_addr)); 520 #undef C 521 break; 522 } 523 524 #ifdef INET6 525 case AF_INET6: 526 { 527 struct sockaddr_in6 sin6; /* use static var for safety */ 528 int niflags = 0; 529 #ifdef NI_WITHSCOPEID 530 niflags = NI_WITHSCOPEID; 531 #endif 532 533 memset(&sin6, 0, sizeof(sin6)); 534 memcpy(&sin6, sa, sa->sa_len); 535 sin6.sin6_len = sizeof(struct sockaddr_in6); 536 sin6.sin6_family = AF_INET6; 537 #ifdef __KAME__ 538 if (sa->sa_len == sizeof(struct sockaddr_in6) && 539 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 540 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 541 sin6.sin6_scope_id == 0) { 542 sin6.sin6_scope_id = 543 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 544 sin6.sin6_addr.s6_addr[2] = 0; 545 sin6.sin6_addr.s6_addr[3] = 0; 546 } 547 #endif 548 if (nflag) 549 niflags |= NI_NUMERICHOST; 550 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 551 line, sizeof(line), NULL, 0, niflags) != 0) 552 strncpy(line, "invalid", sizeof(line)); 553 554 return(line); 555 } 556 #endif 557 558 case AF_APPLETALK: 559 snprintf(line, sizeof(line), "atalk %s", 560 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 561 break; 562 563 #ifdef NS 564 case AF_NS: 565 return(ns_print((struct sockaddr_ns *)sa)); 566 break; 567 #endif 568 569 case AF_LINK: 570 return(link_ntoa((struct sockaddr_dl *)sa)); 571 572 573 default: 574 { 575 /* 576 * Unknown address family; just render the raw 577 * data in sa->sa_data as hex values. 578 */ 579 uint8_t *sp = (uint8_t *)sa->sa_data; 580 uint8_t *splim = (uint8_t *)sa + sa->sa_len; 581 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 582 char *cpe = line + sizeof(line); 583 584 while (sp < splim && cps < cpe) 585 cps += snprintf(cps, cpe - cps, " %02x", *sp++); 586 break; 587 } 588 } 589 return(line); 590 } 591 592 static void 593 set_metric(char *value, int key) 594 { 595 int flag = 0; 596 u_long noval, *valp = &noval; 597 598 switch (key) { 599 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 600 caseof(K_MTU, RTV_MTU, rmx_mtu); 601 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 602 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 603 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 604 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 605 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 606 caseof(K_RTT, RTV_RTT, rmx_rtt); 607 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 608 } 609 rtm_inits |= flag; 610 if (lockrest || locking) 611 rt_metrics.rmx_locks |= flag; 612 if (locking) 613 locking = 0; 614 *valp = atoi(value); 615 } 616 617 static void 618 newroute(int argc, char **argv) 619 { 620 char *cmd; 621 const char *err_str, *dest = "", *gateway = ""; 622 int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC; 623 int key; 624 struct hostent *hp = 0; 625 626 if (uid != 0) { 627 errx(EX_NOPERM, "must be root to alter routing table"); 628 } 629 cmd = argv[0]; 630 if (*cmd != 'g') 631 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 632 while (--argc > 0) { 633 if (**(++argv)== '-') { 634 switch (key = keyword(1 + *argv)) { 635 case K_LINK: 636 af = AF_LINK; 637 aflen = sizeof(struct sockaddr_dl); 638 break; 639 case K_INET: 640 af = AF_INET; 641 aflen = sizeof(struct sockaddr_in); 642 break; 643 #ifdef INET6 644 case K_INET6: 645 af = AF_INET6; 646 aflen = sizeof(struct sockaddr_in6); 647 break; 648 #endif 649 case K_ATALK: 650 af = AF_APPLETALK; 651 aflen = sizeof(struct sockaddr_at); 652 break; 653 case K_SA: 654 af = PF_ROUTE; 655 aflen = sizeof(union sockunion); 656 break; 657 #ifdef NS 658 case K_XNS: 659 af = AF_NS; 660 aflen = sizeof(struct sockaddr_ns); 661 break; 662 #endif 663 case K_IFACE: 664 case K_INTERFACE: 665 iflag++; 666 break; 667 case K_NOSTATIC: 668 flags &= ~RTF_STATIC; 669 break; 670 case K_LLINFO: 671 flags |= RTF_LLINFO; 672 break; 673 case K_LOCK: 674 locking = 1; 675 break; 676 case K_LOCKREST: 677 lockrest = 1; 678 break; 679 case K_HOST: 680 forcehost++; 681 break; 682 case K_REJECT: 683 flags |= RTF_REJECT; 684 break; 685 case K_BLACKHOLE: 686 flags |= RTF_BLACKHOLE; 687 break; 688 case K_PROTO1: 689 flags |= RTF_PROTO1; 690 break; 691 case K_PROTO2: 692 flags |= RTF_PROTO2; 693 break; 694 case K_PROXY: 695 proxy = 1; 696 break; 697 case K_CLONING: 698 flags |= RTF_CLONING; 699 break; 700 case K_XRESOLVE: 701 flags |= RTF_XRESOLVE; 702 break; 703 case K_STATIC: 704 flags |= RTF_STATIC; 705 break; 706 case K_IFA: 707 if (--argc == 0) 708 usage(NULL); 709 getaddr(RTA_IFA, *++argv, 0); 710 break; 711 case K_IFP: 712 if (--argc == 0) 713 usage(NULL); 714 getaddr(RTA_IFP, *++argv, 0); 715 break; 716 case K_GENMASK: 717 if (--argc == 0) 718 usage(NULL); 719 getaddr(RTA_GENMASK, *++argv, 0); 720 break; 721 case K_GATEWAY: 722 if (--argc == 0) 723 usage(NULL); 724 getaddr(RTA_GATEWAY, *++argv, 0); 725 break; 726 case K_DST: 727 if (--argc == 0) 728 usage(NULL); 729 ishost = getaddr(RTA_DST, *++argv, &hp); 730 dest = *argv; 731 break; 732 case K_NETMASK: 733 if (--argc == 0) 734 usage(NULL); 735 getaddr(RTA_NETMASK, *++argv, 0); 736 /* FALLTHROUGH */ 737 case K_NET: 738 forcenet++; 739 break; 740 case K_PREFIXLEN: 741 if (--argc == 0) 742 usage(NULL); 743 if (prefixlen(*++argv) == -1) { 744 forcenet = 0; 745 ishost = 1; 746 } else { 747 forcenet = 1; 748 ishost = 0; 749 } 750 break; 751 case K_MPLS: 752 af = AF_MPLS; 753 aflen = sizeof(struct sockaddr_mpls); 754 break; 755 case K_POP: 756 flags |= RTF_MPLSOPS; 757 af = AF_MPLS; 758 mplsop = MPLSLOP_POP; 759 switch(++popcount){ 760 case 1: 761 getaddr(RTA_MPLS1, "", 0); 762 break; 763 case 2: 764 getaddr(RTA_MPLS2, "", 0); 765 break; 766 case 3: 767 getaddr(RTA_MPLS3, "", 0); 768 break; 769 } 770 break; 771 case K_PUSH: 772 case K_SWAP: 773 if (popcount > 0) { 774 warnx("Push or swap after pop. Ignoring."); 775 break; 776 } 777 if (key == K_PUSH) { 778 mplsop = MPLSLOP_PUSH; 779 ++pushcount; 780 } else { 781 if (pushcount > 0) { 782 warnx("Swap after push. Ignoring."); 783 break; 784 } 785 if (swapcount > 0) { 786 warnx("Too many swaps. Ignoring."); 787 break; 788 } 789 mplsop = MPLSLOP_SWAP; 790 ++swapcount; 791 } 792 flags |= RTF_MPLSOPS; 793 af = AF_MPLS; 794 aflen = sizeof(struct sockaddr_mpls); 795 if (--argc == 0) 796 usage(NULL); 797 switch(pushcount + swapcount){ 798 case 1: 799 getaddr(RTA_MPLS1, *++argv, 0); 800 break; 801 case 2: 802 getaddr(RTA_MPLS2, *++argv, 0); 803 break; 804 case 3: 805 getaddr(RTA_MPLS3, *++argv, 0); 806 break; 807 } 808 break; 809 case K_MTU: 810 case K_HOPCOUNT: 811 case K_EXPIRE: 812 case K_RECVPIPE: 813 case K_SENDPIPE: 814 case K_SSTHRESH: 815 case K_RTT: 816 case K_RTTVAR: 817 if (--argc == 0) 818 usage(NULL); 819 set_metric(*++argv, key); 820 break; 821 default: 822 usage(1+*argv); 823 } 824 } else { 825 if ((rtm_addrs & RTA_DST) == 0) { 826 dest = *argv; 827 ishost = getaddr(RTA_DST, *argv, &hp); 828 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 829 gateway = *argv; 830 getaddr(RTA_GATEWAY, *argv, &hp); 831 } else { 832 getaddr(RTA_NETMASK, *argv, 0); 833 forcenet = 1; 834 } 835 } 836 } 837 if (forcehost) { 838 ishost = 1; 839 #ifdef INET6 840 if (af == AF_INET6) { 841 rtm_addrs &= ~RTA_NETMASK; 842 memset((void *)&so_mask, 0, sizeof(so_mask)); 843 } 844 #endif 845 } 846 if (forcenet) 847 ishost = 0; 848 flags |= RTF_UP; 849 if (ishost) 850 flags |= RTF_HOST; 851 if (iflag == 0) 852 flags |= RTF_GATEWAY; 853 if (proxy) { 854 so_dst.sinarp.sin_other = SIN_PROXY; 855 flags |= RTF_ANNOUNCE; 856 } 857 for (attempts = 1; ; attempts++) { 858 errno = 0; 859 if ((ret = rtmsg(*cmd, flags)) == 0) 860 break; 861 if (errno != ENETUNREACH && errno != ESRCH) 862 break; 863 if (af == AF_INET && *gateway != '\0' && 864 hp != NULL && hp->h_addr_list[1] != NULL) { 865 hp->h_addr_list++; 866 memmove(&so_gate.sin.sin_addr, 867 hp->h_addr_list[0], 868 MIN((size_t)hp->h_length, 869 sizeof(so_gate.sin.sin_addr))); 870 } else 871 break; 872 } 873 if (*cmd == 'g') 874 exit(0); 875 if (!qflag) { 876 oerrno = errno; 877 printf("%s %s %s", cmd, ishost? "host" : "net", dest); 878 if (*gateway != '\0') { 879 printf(": gateway %s", gateway); 880 if (attempts > 1 && ret == 0 && af == AF_INET) 881 printf(" (%s)", 882 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 883 } 884 if (ret == 0) { 885 printf("\n"); 886 } else { 887 switch (oerrno) { 888 case ESRCH: 889 err_str = "not in table"; 890 break; 891 case EBUSY: 892 err_str = "entry in use"; 893 break; 894 case ENOBUFS: 895 err_str = "routing table overflow"; 896 break; 897 case EDQUOT: /* handle recursion avoidance in 898 rt_setgate() */ 899 err_str = "gateway uses the same route"; 900 break; 901 default: 902 err_str = strerror(oerrno); 903 break; 904 } 905 printf(": %s\n", err_str); 906 } 907 } 908 exit(ret != 0); 909 } 910 911 static void 912 inet_makenetandmask(u_long net, struct sockaddr_in *in, u_long bits) 913 { 914 u_long addr, mask = 0; 915 char *cp; 916 917 rtm_addrs |= RTA_NETMASK; 918 /* 919 * XXX: This approach unable to handle 0.0.0.1/32 correctly 920 * as inet_network() converts 0.0.0.1 and 1 equally. 921 */ 922 if (net <= 0xff) 923 addr = net << IN_CLASSA_NSHIFT; 924 else if (net <= 0xffff) 925 addr = net << IN_CLASSB_NSHIFT; 926 else if (net <= 0xffffff) 927 addr = net << IN_CLASSC_NSHIFT; 928 else 929 addr = net; 930 931 if (bits != 0) 932 mask = 0xffffffff << (32 - bits); 933 else if (net == 0) 934 mask = 0; 935 else if (IN_CLASSA(addr)) 936 mask = IN_CLASSA_NET; 937 else if (IN_CLASSB(addr)) 938 mask = IN_CLASSB_NET; 939 else if (IN_CLASSC(addr)) 940 mask = IN_CLASSC_NET; 941 else if (IN_MULTICAST(addr)) 942 mask = IN_CLASSD_NET; 943 else 944 mask = 0xffffffff; 945 946 in->sin_addr.s_addr = htonl(addr); 947 in = &so_mask.sin; 948 in->sin_addr.s_addr = htonl(mask); 949 in->sin_len = 0; 950 in->sin_family = 0; 951 cp = (char *)(&in->sin_addr + 1); 952 while (*--cp == 0 && cp > (char *)in) 953 ; 954 in->sin_len = 1 + cp - (char *)in; 955 } 956 957 #ifdef INET6 958 /* 959 * XXX the function may need more improvement... 960 */ 961 static int 962 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 963 { 964 struct in6_addr in6; 965 966 if (plen == NULL) { 967 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 968 sin6->sin6_scope_id == 0) { 969 plen = "0"; 970 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 971 /* aggregatable global unicast - RFC2374 */ 972 memset(&in6, 0, sizeof(in6)); 973 if (memcmp(&sin6->sin6_addr.s6_addr[8], 974 &in6.s6_addr[8], 8) == 0) 975 plen = "64"; 976 } 977 } 978 979 if (plen == NULL || strcmp(plen, "128") == 0) 980 return(1); 981 rtm_addrs |= RTA_NETMASK; 982 prefixlen(plen); 983 return(0); 984 } 985 #endif 986 987 /* 988 * Interpret an argument as a network address of some kind, 989 * returning 1 if a host address, 0 if a network address. 990 */ 991 static int 992 getaddr(int which, char *str, struct hostent **hpp) 993 { 994 sup su; 995 struct hostent *hp; 996 struct netent *np; 997 u_long val; 998 char *q; 999 int afamily; /* local copy of af so we can change it */ 1000 1001 if (af == 0) { 1002 af = AF_INET; 1003 aflen = sizeof(struct sockaddr_in); 1004 } 1005 afamily = af; 1006 rtm_addrs |= which; 1007 switch (which) { 1008 case RTA_DST: 1009 su = &so_dst; 1010 break; 1011 case RTA_GATEWAY: 1012 su = &so_gate; 1013 if (iflag) { 1014 struct ifaddrs *ifap, *ifa; 1015 struct sockaddr_dl *sdl = NULL; 1016 1017 if (getifaddrs(&ifap)) 1018 err(1, "getifaddrs"); 1019 1020 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1021 if (ifa->ifa_addr->sa_family != AF_LINK) 1022 continue; 1023 1024 if (strcmp(str, ifa->ifa_name) != 0) 1025 continue; 1026 1027 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1028 } 1029 /* If we found it, then use it */ 1030 if (sdl != NULL) { 1031 /* 1032 * Copy is safe since we have a 1033 * sockaddr_storage member in sockunion{}. 1034 * Note that we need to copy before calling 1035 * freeifaddrs(). 1036 * 1037 * Interface routes are routed only by their 1038 * sdl_index or interface name (we provide 1039 * both here), not by the ARP address of the 1040 * local interface (alen, slen = 0). 1041 */ 1042 memcpy(&su->sdl, sdl, sdl->sdl_len); 1043 su->sdl.sdl_alen = 0; 1044 su->sdl.sdl_slen = 0; 1045 } 1046 freeifaddrs(ifap); 1047 if (sdl != NULL) 1048 return(1); 1049 } 1050 break; 1051 case RTA_NETMASK: 1052 su = &so_mask; 1053 break; 1054 case RTA_GENMASK: 1055 su = &so_genmask; 1056 break; 1057 case RTA_IFP: 1058 su = &so_ifp; 1059 afamily = AF_LINK; 1060 break; 1061 case RTA_IFA: 1062 su = &so_ifa; 1063 break; 1064 case RTA_MPLS1: 1065 su = &so_mpls1; 1066 break; 1067 case RTA_MPLS2: 1068 su = &so_mpls2; 1069 break; 1070 case RTA_MPLS3: 1071 su = &so_mpls3; 1072 break; 1073 default: 1074 usage("internal error"); 1075 /*NOTREACHED*/ 1076 } 1077 su->sa.sa_len = aflen; 1078 su->sa.sa_family = afamily; /* cases that don't want it have left 1079 already */ 1080 if (strcmp(str, "default") == 0) { 1081 /* 1082 * Default is net 0.0.0.0/0 1083 */ 1084 switch (which) { 1085 case RTA_DST: 1086 forcenet++; 1087 /* bzero(su, sizeof(*su)); *//* for readability */ 1088 getaddr(RTA_NETMASK, str, 0); 1089 break; 1090 case RTA_NETMASK: 1091 case RTA_GENMASK: 1092 /* bzero(su, sizeof(*su)); *//* for readability */ 1093 break; 1094 } 1095 return(0); 1096 } 1097 switch (afamily) { 1098 #ifdef INET6 1099 case AF_INET6: 1100 { 1101 struct addrinfo hints, *res; 1102 1103 q = NULL; 1104 if (which == RTA_DST && (q = strchr(str, '/')) != NULL) 1105 *q = '\0'; 1106 memset(&hints, 0, sizeof(hints)); 1107 hints.ai_family = afamily; /*AF_INET6*/ 1108 hints.ai_flags = AI_NUMERICHOST; 1109 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1110 if (getaddrinfo(str, "0", &hints, &res) != 0 || 1111 res->ai_family != AF_INET6 || 1112 res->ai_addrlen != sizeof(su->sin6)) { 1113 fprintf(stderr, "%s: bad value\n", str); 1114 exit(1); 1115 } 1116 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1117 #ifdef __KAME__ 1118 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1119 IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) && 1120 su->sin6.sin6_scope_id) { 1121 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1122 htons(su->sin6.sin6_scope_id); 1123 su->sin6.sin6_scope_id = 0; 1124 } 1125 #endif 1126 freeaddrinfo(res); 1127 if (q != NULL) 1128 *q++ = '/'; 1129 if (which == RTA_DST) 1130 return(inet6_makenetandmask(&su->sin6, q)); 1131 return(0); 1132 } 1133 #endif /* INET6 */ 1134 1135 #ifdef NS 1136 case AF_NS: 1137 if (which == RTA_DST) { 1138 struct sockaddr_ns *sms = &(so_mask.sns); 1139 memset(sms, 0, sizeof(*sms)); 1140 sms->sns_family = 0; 1141 sms->sns_len = 6; 1142 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1143 rtm_addrs |= RTA_NETMASK; 1144 } 1145 su->sns.sns_addr = ns_addr(str); 1146 return(!ns_nullhost(su->sns.sns_addr)); 1147 #endif 1148 1149 case AF_APPLETALK: 1150 if (!atalk_aton(str, &su->sat.sat_addr)) 1151 errx(EX_NOHOST, "bad address: %s", str); 1152 rtm_addrs |= RTA_NETMASK; 1153 return(forcehost || su->sat.sat_addr.s_node != 0); 1154 1155 case AF_LINK: 1156 link_addr(str, &su->sdl); 1157 return(1); 1158 1159 case PF_ROUTE: 1160 su->sa.sa_len = sizeof(*su); 1161 sockaddr(str, &su->sa); 1162 return(1); 1163 1164 case AF_MPLS: 1165 { 1166 mpls_label_t label; 1167 1168 bzero(su, sizeof(*su)); 1169 su->sa.sa_len = sizeof(*su); 1170 su->sa.sa_family = AF_MPLS; 1171 su->smpls.smpls_op = mplsop; 1172 if (mplsop != MPLSLOP_POP && mplsop != MPLSLOP_POPALL && 1173 *str != '\0') { 1174 if (sscanf(str, "%u", &label) != 1) 1175 errx(EX_NOHOST, "bad address: %s", str); 1176 su->smpls.smpls_label = htonl(label); 1177 } 1178 return(1); 1179 } 1180 1181 case AF_INET: 1182 default: 1183 break; 1184 } 1185 1186 if (hpp == NULL) 1187 hpp = &hp; 1188 *hpp = NULL; 1189 1190 q = strchr(str,'/'); 1191 if (q != NULL && which == RTA_DST) { 1192 *q = '\0'; 1193 if ((val = inet_network(str)) != INADDR_NONE) { 1194 inet_makenetandmask( 1195 val, &su->sin, strtoul(q+1, 0, 0)); 1196 return(0); 1197 } 1198 *q = '/'; 1199 } 1200 if ((which != RTA_DST || forcenet == 0) && 1201 inet_aton(str, &su->sin.sin_addr)) { 1202 val = su->sin.sin_addr.s_addr; 1203 if (which != RTA_DST || 1204 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1205 return(1); 1206 else { 1207 val = ntohl(val); 1208 goto netdone; 1209 } 1210 } 1211 if (which == RTA_DST && forcehost == 0 && 1212 ((val = inet_network(str)) != INADDR_NONE || 1213 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1214 netdone: 1215 inet_makenetandmask(val, &su->sin, 0); 1216 return(0); 1217 } 1218 hp = gethostbyname(str); 1219 if (hp != NULL) { 1220 *hpp = hp; 1221 su->sin.sin_family = hp->h_addrtype; 1222 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1223 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr))); 1224 return(1); 1225 } 1226 errx(EX_NOHOST, "bad address: %s", str); 1227 } 1228 1229 static int 1230 prefixlen(const char *len_str) 1231 { 1232 int len = atoi(len_str), q, r; 1233 int max; 1234 char *p; 1235 1236 rtm_addrs |= RTA_NETMASK; 1237 switch (af) { 1238 #ifdef INET6 1239 case AF_INET6: 1240 max = 128; 1241 p = (char *)&so_mask.sin6.sin6_addr; 1242 break; 1243 #endif 1244 case AF_INET: 1245 max = 32; 1246 p = (char *)&so_mask.sin.sin_addr; 1247 break; 1248 default: 1249 fprintf(stderr, "prefixlen not supported in this af\n"); 1250 exit(1); 1251 /*NOTREACHED*/ 1252 } 1253 1254 if (len < 0 || max < len) { 1255 fprintf(stderr, "%s: bad value\n", len_str); 1256 exit(1); 1257 } 1258 1259 q = len >> 3; 1260 r = len & 7; 1261 so_mask.sa.sa_family = af; 1262 so_mask.sa.sa_len = aflen; 1263 memset((void *)p, 0, max / 8); 1264 if (q > 0) 1265 memset((void *)p, 0xff, q); 1266 if (r > 0) 1267 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1268 if (len == max) 1269 return(-1); 1270 else 1271 return(len); 1272 } 1273 1274 #ifdef NS 1275 short ns_nullh[] = {0,0,0}; 1276 1277 char * 1278 ns_print(struct sockaddr_ns *sns) 1279 { 1280 struct ns_addr work; 1281 union { union ns_net net_e; u_long long_e; } net; 1282 u_short port; 1283 static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25]; 1284 const char *host = ""; 1285 char *p; 1286 u_char *q; 1287 1288 work = sns->sns_addr; 1289 port = ntohs(work.x_port); 1290 work.x_port = 0; 1291 net.net_e = work.x_net; 1292 if (ns_nullhost(work) && net.long_e == 0) { 1293 if (port == 0) 1294 strncpy(mybuf, "*.*", sizeof(mybuf)); 1295 else 1296 sprintf(mybuf, "*.%XH", port); 1297 return(mybuf); 1298 } 1299 1300 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1301 host = "any"; 1302 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1303 host = "*"; 1304 else { 1305 q = work.x_host.c_host; 1306 sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 1307 q[0], q[1], q[2], q[3], q[4], q[5]); 1308 for (p = chost; *p == '0' && p < chost + 12; p++) 1309 /* void */; 1310 host = p; 1311 } 1312 if (port != 0) 1313 sprintf(cport, ".%XH", htons(port)); 1314 else 1315 *cport = 0; 1316 1317 snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s", 1318 (unsigned long)ntohl(net.long_e), 1319 host, cport); 1320 return(mybuf); 1321 } 1322 #endif 1323 1324 static void 1325 interfaces(void) 1326 { 1327 size_t needed; 1328 int mib[6]; 1329 char *buf, *lim, *next; 1330 struct rt_msghdr *rtm; 1331 1332 mib[0] = CTL_NET; 1333 mib[1] = PF_ROUTE; 1334 mib[2] = 0; /* protocol */ 1335 mib[3] = 0; /* wildcard address family */ 1336 mib[4] = NET_RT_IFLIST; 1337 mib[5] = 0; /* no flags */ 1338 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1339 err(EX_OSERR, "route-sysctl-estimate"); 1340 if ((buf = malloc(needed)) == NULL) 1341 errx(EX_OSERR, "malloc failed"); 1342 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1343 err(EX_OSERR, "actual retrieval of interface table"); 1344 lim = buf + needed; 1345 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1346 rtm = (struct rt_msghdr *)next; 1347 print_rtmsg(rtm, rtm->rtm_msglen); 1348 } 1349 } 1350 1351 static void 1352 monitor(void) 1353 { 1354 int n; 1355 char msg[2048]; 1356 1357 verbose = 1; 1358 if (debugonly) { 1359 interfaces(); 1360 exit(0); 1361 } 1362 for (;;) { 1363 time_t now; 1364 n = read(s, msg, 2048); 1365 now = time(NULL); 1366 printf("\ngot message of size %d on %s", n, ctime(&now)); 1367 print_rtmsg((struct rt_msghdr *)msg, n); 1368 } 1369 } 1370 1371 struct { 1372 struct rt_msghdr m_rtm; 1373 char m_space[512]; 1374 } m_rtmsg; 1375 1376 static int 1377 rtmsg(int cmd, int flags) 1378 { 1379 static int seq; 1380 int rlen; 1381 char *cp = m_rtmsg.m_space; 1382 int l; 1383 1384 #define NEXTADDR(w, u) \ 1385 if (rtm_addrs & (w)) {\ 1386 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1387 if (verbose) sodump(&(u),"u");\ 1388 } 1389 1390 errno = 0; 1391 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1392 if (cmd == 'a') 1393 cmd = RTM_ADD; 1394 else if (cmd == 'c') 1395 cmd = RTM_CHANGE; 1396 else if (cmd == 'g') { 1397 cmd = RTM_GET; 1398 if (so_ifp.sa.sa_family == 0) { 1399 so_ifp.sa.sa_family = AF_LINK; 1400 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1401 rtm_addrs |= RTA_IFP; 1402 } 1403 } else 1404 cmd = RTM_DELETE; 1405 #define rtm m_rtmsg.m_rtm 1406 rtm.rtm_type = cmd; 1407 rtm.rtm_flags = flags; 1408 rtm.rtm_version = RTM_VERSION; 1409 rtm.rtm_seq = ++seq; 1410 rtm.rtm_addrs = rtm_addrs; 1411 rtm.rtm_rmx = rt_metrics; 1412 rtm.rtm_inits = rtm_inits; 1413 1414 if (rtm_addrs & RTA_NETMASK) 1415 mask_addr(); 1416 NEXTADDR(RTA_DST, so_dst); 1417 NEXTADDR(RTA_GATEWAY, so_gate); 1418 NEXTADDR(RTA_NETMASK, so_mask); 1419 NEXTADDR(RTA_GENMASK, so_genmask); 1420 NEXTADDR(RTA_IFP, so_ifp); 1421 NEXTADDR(RTA_IFA, so_ifa); 1422 NEXTADDR(RTA_MPLS1, so_mpls1); 1423 NEXTADDR(RTA_MPLS2, so_mpls2); 1424 NEXTADDR(RTA_MPLS3, so_mpls3); 1425 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1426 if (verbose) 1427 print_rtmsg(&rtm, l); 1428 if (debugonly) 1429 return(0); 1430 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1431 warn("writing to routing socket"); 1432 return(-1); 1433 } 1434 if (cmd == RTM_GET) { 1435 do { 1436 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1437 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1438 if (l < 0) 1439 warn("read from routing socket"); 1440 else 1441 print_getmsg(&rtm, l); 1442 } 1443 #undef rtm 1444 return(0); 1445 } 1446 1447 static void 1448 mask_addr(void) 1449 { 1450 int olen = so_mask.sa.sa_len; 1451 char *cp1 = olen + (char *)&so_mask, *cp2; 1452 1453 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1454 if (*--cp1 != 0) { 1455 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1456 break; 1457 } 1458 if ((rtm_addrs & RTA_DST) == 0) 1459 return; 1460 switch (so_dst.sa.sa_family) { 1461 #ifdef NS 1462 case AF_NS: 1463 #endif 1464 case AF_INET: 1465 #ifdef INET6 1466 case AF_INET6: 1467 #endif 1468 case AF_APPLETALK: 1469 case 0: 1470 return; 1471 } 1472 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1473 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1474 while (cp2 > cp1) 1475 *--cp2 = 0; 1476 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1477 while (cp1 > so_dst.sa.sa_data) 1478 *--cp1 &= *--cp2; 1479 } 1480 1481 const char *msgtypes[] = { 1482 "", 1483 "RTM_ADD: Add Route", 1484 "RTM_DELETE: Delete Route", 1485 "RTM_CHANGE: Change Metrics or flags", 1486 "RTM_GET: Report Metrics", 1487 "RTM_LOSING: Kernel Suspects Partitioning", 1488 "RTM_REDIRECT: Told to use different route", 1489 "RTM_MISS: Lookup failed on this address", 1490 "RTM_LOCK: fix specified metrics", 1491 "RTM_OLDADD: caused by SIOCADDRT", 1492 "RTM_OLDDEL: caused by SIOCDELRT", 1493 "RTM_RESOLVE: Route created by cloning", 1494 "RTM_NEWADDR: address being added to iface", 1495 "RTM_DELADDR: address being removed from iface", 1496 "RTM_IFINFO: iface status change", 1497 "RTM_NEWMADDR: new multicast group membership on iface", 1498 "RTM_DELMADDR: multicast group membership removed from iface", 1499 "RTM_IFANNOUNCE: interface arrival/departure", 1500 0, 1501 }; 1502 1503 char metricnames[] = 1504 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount" 1505 "\1mtu"; 1506 char routeflags[] = 1507 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT" 1508 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016" 1509 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE" 1510 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST"; 1511 char ifnetflags[] = 1512 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1513 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1514 "\017LINK2\020MULTICAST"; 1515 char addrnames[] = 1516 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD" 1517 "\011MPLS1\012MPLS2\013MPLS3"; 1518 1519 static void 1520 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused) 1521 { 1522 struct if_msghdr *ifm; 1523 struct ifa_msghdr *ifam; 1524 #ifdef RTM_NEWMADDR 1525 struct ifma_msghdr *ifmam; 1526 #endif 1527 struct if_announcemsghdr *ifan; 1528 1529 if (verbose == 0) 1530 return; 1531 if (rtm->rtm_version != RTM_VERSION) { 1532 printf("routing message version %d not understood\n", 1533 rtm->rtm_version); 1534 return; 1535 } 1536 if (msgtypes[rtm->rtm_type] != NULL) 1537 printf("%s: ", msgtypes[rtm->rtm_type]); 1538 else 1539 printf("#%d: ", rtm->rtm_type); 1540 printf("len %d, ", rtm->rtm_msglen); 1541 switch (rtm->rtm_type) { 1542 case RTM_IFINFO: 1543 ifm = (struct if_msghdr *)rtm; 1544 printf("if# %d, flags:", ifm->ifm_index); 1545 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1546 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1547 break; 1548 case RTM_NEWADDR: 1549 case RTM_DELADDR: 1550 ifam = (struct ifa_msghdr *)rtm; 1551 printf("metric %d, flags:", ifam->ifam_metric); 1552 bprintf(stdout, ifam->ifam_flags, routeflags); 1553 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1554 break; 1555 #ifdef RTM_NEWMADDR 1556 case RTM_NEWMADDR: 1557 case RTM_DELMADDR: 1558 ifmam = (struct ifma_msghdr *)rtm; 1559 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs); 1560 break; 1561 #endif 1562 case RTM_IFANNOUNCE: 1563 ifan = (struct if_announcemsghdr *)rtm; 1564 printf("if# %d, what: ", ifan->ifan_index); 1565 switch (ifan->ifan_what) { 1566 case IFAN_ARRIVAL: 1567 printf("arrival"); 1568 break; 1569 case IFAN_DEPARTURE: 1570 printf("departure"); 1571 break; 1572 default: 1573 printf("#%d", ifan->ifan_what); 1574 break; 1575 } 1576 printf("\n"); 1577 break; 1578 1579 default: 1580 printf("pid: %ld, seq %d, errno %d, flags:", 1581 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1582 bprintf(stdout, rtm->rtm_flags, routeflags); 1583 pmsg_common(rtm); 1584 } 1585 } 1586 1587 static void 1588 print_getmsg(struct rt_msghdr *rtm, int msglen) 1589 { 1590 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1591 struct sockaddr_dl *ifp = NULL; 1592 struct sockaddr *sa; 1593 char *cp; 1594 int i; 1595 1596 printf(" route to: %s\n", routename(&so_dst.sa)); 1597 if (rtm->rtm_version != RTM_VERSION) { 1598 warnx("routing message version %d not understood", 1599 rtm->rtm_version); 1600 return; 1601 } 1602 if (rtm->rtm_msglen > msglen) { 1603 warnx("message length mismatch, in packet %d, returned %d", 1604 rtm->rtm_msglen, msglen); 1605 } 1606 if (rtm->rtm_errno != 0) { 1607 errno = rtm->rtm_errno; 1608 warn("message indicates error %d", errno); 1609 return; 1610 } 1611 cp = ((char *)(rtm + 1)); 1612 if (rtm->rtm_addrs) 1613 for (i = 1; i != 0; i <<= 1) 1614 if (i & rtm->rtm_addrs) { 1615 sa = (struct sockaddr *)cp; 1616 switch (i) { 1617 case RTA_DST: 1618 dst = sa; 1619 break; 1620 case RTA_GATEWAY: 1621 gate = sa; 1622 break; 1623 case RTA_NETMASK: 1624 mask = sa; 1625 break; 1626 case RTA_IFP: 1627 if (sa->sa_family == AF_LINK && 1628 ((struct sockaddr_dl *)sa)->sdl_nlen) 1629 ifp = (struct sockaddr_dl *)sa; 1630 break; 1631 } 1632 ADVANCE(cp, sa); 1633 } 1634 if (dst != NULL && mask != NULL) 1635 mask->sa_family = dst->sa_family; /* XXX */ 1636 if (dst != NULL) 1637 printf("destination: %s\n", routename(dst)); 1638 if (mask != NULL) { 1639 int savenflag = nflag; 1640 1641 nflag = 1; 1642 printf(" mask: %s\n", routename(mask)); 1643 nflag = savenflag; 1644 } 1645 if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY) 1646 printf(" gateway: %s\n", routename(gate)); 1647 if (ifp != NULL) 1648 printf(" interface: %.*s\n", 1649 ifp->sdl_nlen, ifp->sdl_data); 1650 printf(" flags: "); 1651 bprintf(stdout, rtm->rtm_flags, routeflags); 1652 1653 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1654 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1655 1656 printf("\n%s\n", "\ 1657 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1658 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1659 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1660 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1661 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1662 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1663 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1664 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1665 if (rtm->rtm_rmx.rmx_expire != 0) 1666 rtm->rtm_rmx.rmx_expire -= time(0); 1667 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1668 #undef lock 1669 #undef msec 1670 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1671 if (verbose) 1672 pmsg_common(rtm); 1673 else if (rtm->rtm_addrs &~ RTA_IGN) { 1674 printf("sockaddrs: "); 1675 bprintf(stdout, rtm->rtm_addrs, addrnames); 1676 putchar('\n'); 1677 } 1678 #undef RTA_IGN 1679 } 1680 1681 static void 1682 pmsg_common(struct rt_msghdr *rtm) 1683 { 1684 printf("\nlocks: "); 1685 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1686 printf(" inits: "); 1687 bprintf(stdout, rtm->rtm_inits, metricnames); 1688 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1689 } 1690 1691 static void 1692 pmsg_addrs(char *cp, int addrs) 1693 { 1694 struct sockaddr *sa; 1695 int i; 1696 1697 if (addrs == 0) { 1698 putchar('\n'); 1699 return; 1700 } 1701 printf("\nsockaddrs: "); 1702 bprintf(stdout, addrs, addrnames); 1703 putchar('\n'); 1704 for (i = 1; i != 0; i <<= 1) 1705 if (i & addrs) { 1706 sa = (struct sockaddr *)cp; 1707 printf(" %s", routename(sa)); 1708 ADVANCE(cp, sa); 1709 } 1710 putchar('\n'); 1711 fflush(stdout); 1712 } 1713 1714 static void 1715 bprintf(FILE *fp, int b, u_char *str) 1716 { 1717 int i; 1718 int gotsome = 0; 1719 1720 if (b == 0) 1721 return; 1722 while ((i = *str++) != 0) { 1723 if (b & (1 << (i-1))) { 1724 if (!gotsome) 1725 i = '<'; 1726 else 1727 i = ','; 1728 putc(i, fp); 1729 gotsome = 1; 1730 for (; (i = *str) > 32; str++) 1731 putc(i, fp); 1732 } else 1733 while (*str > 32) 1734 str++; 1735 } 1736 if (gotsome) 1737 putc('>', fp); 1738 } 1739 1740 int 1741 keyword(const char *cp) 1742 { 1743 struct keytab *kt = keywords; 1744 1745 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1746 kt++; 1747 return(kt->kt_i); 1748 } 1749 1750 static void 1751 sodump(sup su, const char *which) 1752 { 1753 switch (su->sa.sa_family) { 1754 case AF_LINK: 1755 printf("%s: link %s; ", 1756 which, link_ntoa(&su->sdl)); 1757 break; 1758 case AF_INET: 1759 printf("%s: inet %s; ", 1760 which, inet_ntoa(su->sin.sin_addr)); 1761 break; 1762 case AF_APPLETALK: 1763 printf("%s: atalk %s; ", 1764 which, atalk_ntoa(su->sat.sat_addr)); 1765 break; 1766 #ifdef NS 1767 case AF_NS: 1768 printf("%s: xns %s; ", 1769 which, ns_ntoa(su->sns.sns_addr)); 1770 break; 1771 #endif 1772 } 1773 fflush(stdout); 1774 } 1775 1776 /* States*/ 1777 #define VIRGIN 0 1778 #define GOTONE 1 1779 #define GOTTWO 2 1780 /* Inputs */ 1781 #define DIGIT (4*0) 1782 #define END (4*1) 1783 #define DELIM (4*2) 1784 1785 static void 1786 sockaddr(char *addr, struct sockaddr *sa) 1787 { 1788 char *cp = (char *)sa; 1789 int size = sa->sa_len; 1790 char *cplim = cp + size; 1791 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1792 1793 memset(cp, 0, size); 1794 cp++; 1795 do { 1796 if ((*addr >= '0') && (*addr <= '9')) { 1797 new = *addr - '0'; 1798 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1799 new = *addr - 'a' + 10; 1800 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1801 new = *addr - 'A' + 10; 1802 } else if (*addr == '\0') 1803 state |= END; 1804 else 1805 state |= DELIM; 1806 addr++; 1807 switch (state /* | INPUT */) { 1808 case GOTTWO | DIGIT: 1809 *cp++ = byte; /*FALLTHROUGH*/ 1810 case VIRGIN | DIGIT: 1811 state = GOTONE; byte = new; continue; 1812 case GOTONE | DIGIT: 1813 state = GOTTWO; byte = new + (byte << 4); continue; 1814 default: /* | DELIM */ 1815 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1816 case GOTONE | END: 1817 case GOTTWO | END: 1818 *cp++ = byte; /* FALLTHROUGH */ 1819 case VIRGIN | END: 1820 break; 1821 } 1822 break; 1823 } while (cp < cplim); 1824 sa->sa_len = cp - (char *)sa; 1825 } 1826 1827 static int 1828 atalk_aton(const char *text, struct at_addr *addr) 1829 { 1830 u_int net, node; 1831 1832 if (sscanf(text, "%u.%u", &net, &node) != 2 1833 || net > 0xffff || node > 0xff) 1834 return(0); 1835 addr->s_net = htons(net); 1836 addr->s_node = node; 1837 return(1); 1838 } 1839 1840 static char * 1841 atalk_ntoa(struct at_addr at) 1842 { 1843 static char buf[20]; 1844 1845 snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1846 return(buf); 1847 } 1848