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((char *)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((char *)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((char *)&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((char *)NULL); 709 getaddr(RTA_IFA, *++argv, 0); 710 break; 711 case K_IFP: 712 if (--argc == 0) 713 usage((char *)NULL); 714 getaddr(RTA_IFP, *++argv, 0); 715 break; 716 case K_GENMASK: 717 if (--argc == 0) 718 usage((char *)NULL); 719 getaddr(RTA_GENMASK, *++argv, 0); 720 break; 721 case K_GATEWAY: 722 if (--argc == 0) 723 usage((char *)NULL); 724 getaddr(RTA_GATEWAY, *++argv, 0); 725 break; 726 case K_DST: 727 if (--argc == 0) 728 usage((char *)NULL); 729 ishost = getaddr(RTA_DST, *++argv, &hp); 730 dest = *argv; 731 break; 732 case K_NETMASK: 733 if (--argc == 0) 734 usage((char *)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((char *)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((char *)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((char *)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 if (net == 0) 919 mask = addr = 0; 920 else { 921 if (net <= 0xff) 922 addr = net << 24; 923 else if (net <= 0xffff) 924 addr = net << 16; 925 else if (net <= 0xffffff) 926 addr = net << 8; 927 else 928 addr = net; 929 930 if (bits) 931 mask = 0xffffffff << (32 - bits); 932 else { 933 if (IN_CLASSA(addr)) { 934 mask = IN_CLASSA_NET; 935 } else if (IN_CLASSB(addr)) { 936 mask = IN_CLASSB_NET; 937 } else if (IN_CLASSC(addr)) { 938 mask = IN_CLASSC_NET; 939 } else 940 mask = 0xffffffff; 941 } 942 addr &= mask; 943 } 944 in->sin_addr.s_addr = htonl(addr); 945 in = &so_mask.sin; 946 in->sin_addr.s_addr = htonl(mask); 947 in->sin_len = 0; 948 in->sin_family = 0; 949 cp = (char *)(&in->sin_addr + 1); 950 while (*--cp == 0 && cp > (char *)in) 951 ; 952 in->sin_len = 1 + cp - (char *)in; 953 } 954 955 #ifdef INET6 956 /* 957 * XXX the function may need more improvement... 958 */ 959 static int 960 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 961 { 962 struct in6_addr in6; 963 964 if (plen == NULL) { 965 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 966 sin6->sin6_scope_id == 0) { 967 plen = "0"; 968 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 969 /* aggregatable global unicast - RFC2374 */ 970 memset(&in6, 0, sizeof(in6)); 971 if (memcmp(&sin6->sin6_addr.s6_addr[8], 972 &in6.s6_addr[8], 8) == 0) 973 plen = "64"; 974 } 975 } 976 977 if (plen == NULL || strcmp(plen, "128") == 0) 978 return(1); 979 rtm_addrs |= RTA_NETMASK; 980 prefixlen(plen); 981 return(0); 982 } 983 #endif 984 985 /* 986 * Interpret an argument as a network address of some kind, 987 * returning 1 if a host address, 0 if a network address. 988 */ 989 static int 990 getaddr(int which, char *str, struct hostent **hpp) 991 { 992 sup su; 993 struct hostent *hp; 994 struct netent *np; 995 u_long val; 996 char *q; 997 int afamily; /* local copy of af so we can change it */ 998 999 if (af == 0) { 1000 af = AF_INET; 1001 aflen = sizeof(struct sockaddr_in); 1002 } 1003 afamily = af; 1004 rtm_addrs |= which; 1005 switch (which) { 1006 case RTA_DST: 1007 su = &so_dst; 1008 break; 1009 case RTA_GATEWAY: 1010 su = &so_gate; 1011 if (iflag) { 1012 struct ifaddrs *ifap, *ifa; 1013 struct sockaddr_dl *sdl = NULL; 1014 1015 if (getifaddrs(&ifap)) 1016 err(1, "getifaddrs"); 1017 1018 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 1019 if (ifa->ifa_addr->sa_family != AF_LINK) 1020 continue; 1021 1022 if (strcmp(str, ifa->ifa_name) != 0) 1023 continue; 1024 1025 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1026 } 1027 /* If we found it, then use it */ 1028 if (sdl != NULL) { 1029 /* 1030 * Copy is safe since we have a 1031 * sockaddr_storage member in sockunion{}. 1032 * Note that we need to copy before calling 1033 * freeifaddrs(). 1034 * 1035 * Interface routes are routed only by their 1036 * sdl_index or interface name (we provide 1037 * both here), not by the ARP address of the 1038 * local interface (alen, slen = 0). 1039 */ 1040 memcpy(&su->sdl, sdl, sdl->sdl_len); 1041 su->sdl.sdl_alen = 0; 1042 su->sdl.sdl_slen = 0; 1043 } 1044 freeifaddrs(ifap); 1045 if (sdl != NULL) 1046 return(1); 1047 } 1048 break; 1049 case RTA_NETMASK: 1050 su = &so_mask; 1051 break; 1052 case RTA_GENMASK: 1053 su = &so_genmask; 1054 break; 1055 case RTA_IFP: 1056 su = &so_ifp; 1057 afamily = AF_LINK; 1058 break; 1059 case RTA_IFA: 1060 su = &so_ifa; 1061 break; 1062 case RTA_MPLS1: 1063 su = &so_mpls1; 1064 break; 1065 case RTA_MPLS2: 1066 su = &so_mpls2; 1067 break; 1068 case RTA_MPLS3: 1069 su = &so_mpls3; 1070 break; 1071 default: 1072 usage("internal error"); 1073 /*NOTREACHED*/ 1074 } 1075 su->sa.sa_len = aflen; 1076 su->sa.sa_family = afamily; /* cases that don't want it have left 1077 already */ 1078 if (strcmp(str, "default") == 0) { 1079 /* 1080 * Default is net 0.0.0.0/0 1081 */ 1082 switch (which) { 1083 case RTA_DST: 1084 forcenet++; 1085 /* bzero(su, sizeof(*su)); *//* for readability */ 1086 getaddr(RTA_NETMASK, str, 0); 1087 break; 1088 case RTA_NETMASK: 1089 case RTA_GENMASK: 1090 /* bzero(su, sizeof(*su)); *//* for readability */ 1091 break; 1092 } 1093 return(0); 1094 } 1095 switch (afamily) { 1096 #ifdef INET6 1097 case AF_INET6: 1098 { 1099 struct addrinfo hints, *res; 1100 1101 q = NULL; 1102 if (which == RTA_DST && (q = strchr(str, '/')) != NULL) 1103 *q = '\0'; 1104 memset(&hints, 0, sizeof(hints)); 1105 hints.ai_family = afamily; /*AF_INET6*/ 1106 hints.ai_flags = AI_NUMERICHOST; 1107 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1108 if (getaddrinfo(str, "0", &hints, &res) != 0 || 1109 res->ai_family != AF_INET6 || 1110 res->ai_addrlen != sizeof(su->sin6)) { 1111 fprintf(stderr, "%s: bad value\n", str); 1112 exit(1); 1113 } 1114 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1115 #ifdef __KAME__ 1116 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1117 IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) && 1118 su->sin6.sin6_scope_id) { 1119 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1120 htons(su->sin6.sin6_scope_id); 1121 su->sin6.sin6_scope_id = 0; 1122 } 1123 #endif 1124 freeaddrinfo(res); 1125 if (q != NULL) 1126 *q++ = '/'; 1127 if (which == RTA_DST) 1128 return(inet6_makenetandmask(&su->sin6, q)); 1129 return(0); 1130 } 1131 #endif /* INET6 */ 1132 1133 #ifdef NS 1134 case AF_NS: 1135 if (which == RTA_DST) { 1136 struct sockaddr_ns *sms = &(so_mask.sns); 1137 memset(sms, 0, sizeof(*sms)); 1138 sms->sns_family = 0; 1139 sms->sns_len = 6; 1140 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1141 rtm_addrs |= RTA_NETMASK; 1142 } 1143 su->sns.sns_addr = ns_addr(str); 1144 return(!ns_nullhost(su->sns.sns_addr)); 1145 #endif 1146 1147 case AF_APPLETALK: 1148 if (!atalk_aton(str, &su->sat.sat_addr)) 1149 errx(EX_NOHOST, "bad address: %s", str); 1150 rtm_addrs |= RTA_NETMASK; 1151 return(forcehost || su->sat.sat_addr.s_node != 0); 1152 1153 case AF_LINK: 1154 link_addr(str, &su->sdl); 1155 return(1); 1156 1157 case PF_ROUTE: 1158 su->sa.sa_len = sizeof(*su); 1159 sockaddr(str, &su->sa); 1160 return(1); 1161 1162 case AF_MPLS: 1163 { 1164 mpls_label_t label; 1165 1166 bzero(su, sizeof(*su)); 1167 su->sa.sa_len = sizeof(*su); 1168 su->sa.sa_family = AF_MPLS; 1169 su->smpls.smpls_op = mplsop; 1170 if (mplsop != MPLSLOP_POP && mplsop != MPLSLOP_POPALL && 1171 *str != '\0') { 1172 if (sscanf(str, "%u", &label) != 1) 1173 errx(EX_NOHOST, "bad address: %s", str); 1174 su->smpls.smpls_label = htonl(label); 1175 } 1176 return(1); 1177 } 1178 1179 case AF_INET: 1180 default: 1181 break; 1182 } 1183 1184 if (hpp == NULL) 1185 hpp = &hp; 1186 *hpp = NULL; 1187 1188 q = strchr(str,'/'); 1189 if (q != NULL && which == RTA_DST) { 1190 *q = '\0'; 1191 if ((val = inet_network(str)) != INADDR_NONE) { 1192 inet_makenetandmask( 1193 val, &su->sin, strtoul(q+1, 0, 0)); 1194 return(0); 1195 } 1196 *q = '/'; 1197 } 1198 if ((which != RTA_DST || forcenet == 0) && 1199 inet_aton(str, &su->sin.sin_addr)) { 1200 val = su->sin.sin_addr.s_addr; 1201 if (which != RTA_DST || 1202 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1203 return(1); 1204 else { 1205 val = ntohl(val); 1206 goto netdone; 1207 } 1208 } 1209 if (which == RTA_DST && forcehost == 0 && 1210 ((val = inet_network(str)) != INADDR_NONE || 1211 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1212 netdone: 1213 inet_makenetandmask(val, &su->sin, 0); 1214 return(0); 1215 } 1216 hp = gethostbyname(str); 1217 if (hp != NULL) { 1218 *hpp = hp; 1219 su->sin.sin_family = hp->h_addrtype; 1220 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1221 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr))); 1222 return(1); 1223 } 1224 errx(EX_NOHOST, "bad address: %s", str); 1225 } 1226 1227 static int 1228 prefixlen(const char *len_str) 1229 { 1230 int len = atoi(len_str), q, r; 1231 int max; 1232 char *p; 1233 1234 rtm_addrs |= RTA_NETMASK; 1235 switch (af) { 1236 #ifdef INET6 1237 case AF_INET6: 1238 max = 128; 1239 p = (char *)&so_mask.sin6.sin6_addr; 1240 break; 1241 #endif 1242 case AF_INET: 1243 max = 32; 1244 p = (char *)&so_mask.sin.sin_addr; 1245 break; 1246 default: 1247 fprintf(stderr, "prefixlen not supported in this af\n"); 1248 exit(1); 1249 /*NOTREACHED*/ 1250 } 1251 1252 if (len < 0 || max < len) { 1253 fprintf(stderr, "%s: bad value\n", len_str); 1254 exit(1); 1255 } 1256 1257 q = len >> 3; 1258 r = len & 7; 1259 so_mask.sa.sa_family = af; 1260 so_mask.sa.sa_len = aflen; 1261 memset((void *)p, 0, max / 8); 1262 if (q > 0) 1263 memset((void *)p, 0xff, q); 1264 if (r > 0) 1265 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1266 if (len == max) 1267 return(-1); 1268 else 1269 return(len); 1270 } 1271 1272 #ifdef NS 1273 short ns_nullh[] = {0,0,0}; 1274 1275 char * 1276 ns_print(struct sockaddr_ns *sns) 1277 { 1278 struct ns_addr work; 1279 union { union ns_net net_e; u_long long_e; } net; 1280 u_short port; 1281 static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25]; 1282 const char *host = ""; 1283 char *p; 1284 u_char *q; 1285 1286 work = sns->sns_addr; 1287 port = ntohs(work.x_port); 1288 work.x_port = 0; 1289 net.net_e = work.x_net; 1290 if (ns_nullhost(work) && net.long_e == 0) { 1291 if (port == 0) 1292 strncpy(mybuf, "*.*", sizeof(mybuf)); 1293 else 1294 sprintf(mybuf, "*.%XH", port); 1295 return(mybuf); 1296 } 1297 1298 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1299 host = "any"; 1300 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1301 host = "*"; 1302 else { 1303 q = work.x_host.c_host; 1304 sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 1305 q[0], q[1], q[2], q[3], q[4], q[5]); 1306 for (p = chost; *p == '0' && p < chost + 12; p++) 1307 /* void */; 1308 host = p; 1309 } 1310 if (port != 0) 1311 sprintf(cport, ".%XH", htons(port)); 1312 else 1313 *cport = 0; 1314 1315 snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s", 1316 (unsigned long)ntohl(net.long_e), 1317 host, cport); 1318 return(mybuf); 1319 } 1320 #endif 1321 1322 static void 1323 interfaces(void) 1324 { 1325 size_t needed; 1326 int mib[6]; 1327 char *buf, *lim, *next; 1328 struct rt_msghdr *rtm; 1329 1330 mib[0] = CTL_NET; 1331 mib[1] = PF_ROUTE; 1332 mib[2] = 0; /* protocol */ 1333 mib[3] = 0; /* wildcard address family */ 1334 mib[4] = NET_RT_IFLIST; 1335 mib[5] = 0; /* no flags */ 1336 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1337 err(EX_OSERR, "route-sysctl-estimate"); 1338 if ((buf = malloc(needed)) == NULL) 1339 errx(EX_OSERR, "malloc failed"); 1340 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1341 err(EX_OSERR, "actual retrieval of interface table"); 1342 lim = buf + needed; 1343 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1344 rtm = (struct rt_msghdr *)next; 1345 print_rtmsg(rtm, rtm->rtm_msglen); 1346 } 1347 } 1348 1349 static void 1350 monitor(void) 1351 { 1352 int n; 1353 char msg[2048]; 1354 1355 verbose = 1; 1356 if (debugonly) { 1357 interfaces(); 1358 exit(0); 1359 } 1360 for (;;) { 1361 time_t now; 1362 n = read(s, msg, 2048); 1363 now = time(NULL); 1364 printf("\ngot message of size %d on %s", n, ctime(&now)); 1365 print_rtmsg((struct rt_msghdr *)msg, n); 1366 } 1367 } 1368 1369 struct { 1370 struct rt_msghdr m_rtm; 1371 char m_space[512]; 1372 } m_rtmsg; 1373 1374 static int 1375 rtmsg(int cmd, int flags) 1376 { 1377 static int seq; 1378 int rlen; 1379 char *cp = m_rtmsg.m_space; 1380 int l; 1381 1382 #define NEXTADDR(w, u) \ 1383 if (rtm_addrs & (w)) {\ 1384 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1385 if (verbose) sodump(&(u),"u");\ 1386 } 1387 1388 errno = 0; 1389 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1390 if (cmd == 'a') 1391 cmd = RTM_ADD; 1392 else if (cmd == 'c') 1393 cmd = RTM_CHANGE; 1394 else if (cmd == 'g') { 1395 cmd = RTM_GET; 1396 if (so_ifp.sa.sa_family == 0) { 1397 so_ifp.sa.sa_family = AF_LINK; 1398 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1399 rtm_addrs |= RTA_IFP; 1400 } 1401 } else 1402 cmd = RTM_DELETE; 1403 #define rtm m_rtmsg.m_rtm 1404 rtm.rtm_type = cmd; 1405 rtm.rtm_flags = flags; 1406 rtm.rtm_version = RTM_VERSION; 1407 rtm.rtm_seq = ++seq; 1408 rtm.rtm_addrs = rtm_addrs; 1409 rtm.rtm_rmx = rt_metrics; 1410 rtm.rtm_inits = rtm_inits; 1411 1412 if (rtm_addrs & RTA_NETMASK) 1413 mask_addr(); 1414 NEXTADDR(RTA_DST, so_dst); 1415 NEXTADDR(RTA_GATEWAY, so_gate); 1416 NEXTADDR(RTA_NETMASK, so_mask); 1417 NEXTADDR(RTA_GENMASK, so_genmask); 1418 NEXTADDR(RTA_IFP, so_ifp); 1419 NEXTADDR(RTA_IFA, so_ifa); 1420 NEXTADDR(RTA_MPLS1, so_mpls1); 1421 NEXTADDR(RTA_MPLS2, so_mpls2); 1422 NEXTADDR(RTA_MPLS3, so_mpls3); 1423 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1424 if (verbose) 1425 print_rtmsg(&rtm, l); 1426 if (debugonly) 1427 return(0); 1428 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1429 warn("writing to routing socket"); 1430 return(-1); 1431 } 1432 if (cmd == RTM_GET) { 1433 do { 1434 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1435 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1436 if (l < 0) 1437 warn("read from routing socket"); 1438 else 1439 print_getmsg(&rtm, l); 1440 } 1441 #undef rtm 1442 return(0); 1443 } 1444 1445 static void 1446 mask_addr(void) 1447 { 1448 int olen = so_mask.sa.sa_len; 1449 char *cp1 = olen + (char *)&so_mask, *cp2; 1450 1451 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1452 if (*--cp1 != 0) { 1453 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1454 break; 1455 } 1456 if ((rtm_addrs & RTA_DST) == 0) 1457 return; 1458 switch (so_dst.sa.sa_family) { 1459 #ifdef NS 1460 case AF_NS: 1461 #endif 1462 case AF_INET: 1463 #ifdef INET6 1464 case AF_INET6: 1465 #endif 1466 case AF_APPLETALK: 1467 case 0: 1468 return; 1469 } 1470 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1471 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1472 while (cp2 > cp1) 1473 *--cp2 = 0; 1474 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1475 while (cp1 > so_dst.sa.sa_data) 1476 *--cp1 &= *--cp2; 1477 } 1478 1479 const char *msgtypes[] = { 1480 "", 1481 "RTM_ADD: Add Route", 1482 "RTM_DELETE: Delete Route", 1483 "RTM_CHANGE: Change Metrics or flags", 1484 "RTM_GET: Report Metrics", 1485 "RTM_LOSING: Kernel Suspects Partitioning", 1486 "RTM_REDIRECT: Told to use different route", 1487 "RTM_MISS: Lookup failed on this address", 1488 "RTM_LOCK: fix specified metrics", 1489 "RTM_OLDADD: caused by SIOCADDRT", 1490 "RTM_OLDDEL: caused by SIOCDELRT", 1491 "RTM_RESOLVE: Route created by cloning", 1492 "RTM_NEWADDR: address being added to iface", 1493 "RTM_DELADDR: address being removed from iface", 1494 "RTM_IFINFO: iface status change", 1495 "RTM_NEWMADDR: new multicast group membership on iface", 1496 "RTM_DELMADDR: multicast group membership removed from iface", 1497 "RTM_IFANNOUNCE: interface arrival/departure", 1498 0, 1499 }; 1500 1501 char metricnames[] = 1502 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount" 1503 "\1mtu"; 1504 char routeflags[] = 1505 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT" 1506 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016" 1507 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE" 1508 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST"; 1509 char ifnetflags[] = 1510 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1511 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1512 "\017LINK2\020MULTICAST"; 1513 char addrnames[] = 1514 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD" 1515 "\011MPLS1\012MPLS2\013MPLS3"; 1516 1517 static void 1518 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused) 1519 { 1520 struct if_msghdr *ifm; 1521 struct ifa_msghdr *ifam; 1522 #ifdef RTM_NEWMADDR 1523 struct ifma_msghdr *ifmam; 1524 #endif 1525 struct if_announcemsghdr *ifan; 1526 1527 if (verbose == 0) 1528 return; 1529 if (rtm->rtm_version != RTM_VERSION) { 1530 printf("routing message version %d not understood\n", 1531 rtm->rtm_version); 1532 return; 1533 } 1534 if (msgtypes[rtm->rtm_type] != NULL) 1535 printf("%s: ", msgtypes[rtm->rtm_type]); 1536 else 1537 printf("#%d: ", rtm->rtm_type); 1538 printf("len %d, ", rtm->rtm_msglen); 1539 switch (rtm->rtm_type) { 1540 case RTM_IFINFO: 1541 ifm = (struct if_msghdr *)rtm; 1542 printf("if# %d, flags:", ifm->ifm_index); 1543 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1544 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1545 break; 1546 case RTM_NEWADDR: 1547 case RTM_DELADDR: 1548 ifam = (struct ifa_msghdr *)rtm; 1549 printf("metric %d, flags:", ifam->ifam_metric); 1550 bprintf(stdout, ifam->ifam_flags, routeflags); 1551 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1552 break; 1553 #ifdef RTM_NEWMADDR 1554 case RTM_NEWMADDR: 1555 case RTM_DELMADDR: 1556 ifmam = (struct ifma_msghdr *)rtm; 1557 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs); 1558 break; 1559 #endif 1560 case RTM_IFANNOUNCE: 1561 ifan = (struct if_announcemsghdr *)rtm; 1562 printf("if# %d, what: ", ifan->ifan_index); 1563 switch (ifan->ifan_what) { 1564 case IFAN_ARRIVAL: 1565 printf("arrival"); 1566 break; 1567 case IFAN_DEPARTURE: 1568 printf("departure"); 1569 break; 1570 default: 1571 printf("#%d", ifan->ifan_what); 1572 break; 1573 } 1574 printf("\n"); 1575 break; 1576 1577 default: 1578 printf("pid: %ld, seq %d, errno %d, flags:", 1579 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1580 bprintf(stdout, rtm->rtm_flags, routeflags); 1581 pmsg_common(rtm); 1582 } 1583 } 1584 1585 static void 1586 print_getmsg(struct rt_msghdr *rtm, int msglen) 1587 { 1588 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1589 struct sockaddr_dl *ifp = NULL; 1590 struct sockaddr *sa; 1591 char *cp; 1592 int i; 1593 1594 printf(" route to: %s\n", routename(&so_dst.sa)); 1595 if (rtm->rtm_version != RTM_VERSION) { 1596 warnx("routing message version %d not understood", 1597 rtm->rtm_version); 1598 return; 1599 } 1600 if (rtm->rtm_msglen > msglen) { 1601 warnx("message length mismatch, in packet %d, returned %d", 1602 rtm->rtm_msglen, msglen); 1603 } 1604 if (rtm->rtm_errno != 0) { 1605 errno = rtm->rtm_errno; 1606 warn("message indicates error %d", errno); 1607 return; 1608 } 1609 cp = ((char *)(rtm + 1)); 1610 if (rtm->rtm_addrs) 1611 for (i = 1; i != 0; i <<= 1) 1612 if (i & rtm->rtm_addrs) { 1613 sa = (struct sockaddr *)cp; 1614 switch (i) { 1615 case RTA_DST: 1616 dst = sa; 1617 break; 1618 case RTA_GATEWAY: 1619 gate = sa; 1620 break; 1621 case RTA_NETMASK: 1622 mask = sa; 1623 break; 1624 case RTA_IFP: 1625 if (sa->sa_family == AF_LINK && 1626 ((struct sockaddr_dl *)sa)->sdl_nlen) 1627 ifp = (struct sockaddr_dl *)sa; 1628 break; 1629 } 1630 ADVANCE(cp, sa); 1631 } 1632 if (dst != NULL && mask != NULL) 1633 mask->sa_family = dst->sa_family; /* XXX */ 1634 if (dst != NULL) 1635 printf("destination: %s\n", routename(dst)); 1636 if (mask != NULL) { 1637 int savenflag = nflag; 1638 1639 nflag = 1; 1640 printf(" mask: %s\n", routename(mask)); 1641 nflag = savenflag; 1642 } 1643 if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY) 1644 printf(" gateway: %s\n", routename(gate)); 1645 if (ifp != NULL) 1646 printf(" interface: %.*s\n", 1647 ifp->sdl_nlen, ifp->sdl_data); 1648 printf(" flags: "); 1649 bprintf(stdout, rtm->rtm_flags, routeflags); 1650 1651 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1652 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1653 1654 printf("\n%s\n", "\ 1655 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1656 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1657 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1658 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1659 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1660 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1661 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1662 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1663 if (rtm->rtm_rmx.rmx_expire != 0) 1664 rtm->rtm_rmx.rmx_expire -= time(0); 1665 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1666 #undef lock 1667 #undef msec 1668 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1669 if (verbose) 1670 pmsg_common(rtm); 1671 else if (rtm->rtm_addrs &~ RTA_IGN) { 1672 printf("sockaddrs: "); 1673 bprintf(stdout, rtm->rtm_addrs, addrnames); 1674 putchar('\n'); 1675 } 1676 #undef RTA_IGN 1677 } 1678 1679 static void 1680 pmsg_common(struct rt_msghdr *rtm) 1681 { 1682 printf("\nlocks: "); 1683 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1684 printf(" inits: "); 1685 bprintf(stdout, rtm->rtm_inits, metricnames); 1686 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1687 } 1688 1689 static void 1690 pmsg_addrs(char *cp, int addrs) 1691 { 1692 struct sockaddr *sa; 1693 int i; 1694 1695 if (addrs == 0) { 1696 putchar('\n'); 1697 return; 1698 } 1699 printf("\nsockaddrs: "); 1700 bprintf(stdout, addrs, addrnames); 1701 putchar('\n'); 1702 for (i = 1; i != 0; i <<= 1) 1703 if (i & addrs) { 1704 sa = (struct sockaddr *)cp; 1705 printf(" %s", routename(sa)); 1706 ADVANCE(cp, sa); 1707 } 1708 putchar('\n'); 1709 fflush(stdout); 1710 } 1711 1712 static void 1713 bprintf(FILE *fp, int b, u_char *str) 1714 { 1715 int i; 1716 int gotsome = 0; 1717 1718 if (b == 0) 1719 return; 1720 while ((i = *str++) != 0) { 1721 if (b & (1 << (i-1))) { 1722 if (!gotsome) 1723 i = '<'; 1724 else 1725 i = ','; 1726 putc(i, fp); 1727 gotsome = 1; 1728 for (; (i = *str) > 32; str++) 1729 putc(i, fp); 1730 } else 1731 while (*str > 32) 1732 str++; 1733 } 1734 if (gotsome) 1735 putc('>', fp); 1736 } 1737 1738 int 1739 keyword(const char *cp) 1740 { 1741 struct keytab *kt = keywords; 1742 1743 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1744 kt++; 1745 return(kt->kt_i); 1746 } 1747 1748 static void 1749 sodump(sup su, const char *which) 1750 { 1751 switch (su->sa.sa_family) { 1752 case AF_LINK: 1753 printf("%s: link %s; ", 1754 which, link_ntoa(&su->sdl)); 1755 break; 1756 case AF_INET: 1757 printf("%s: inet %s; ", 1758 which, inet_ntoa(su->sin.sin_addr)); 1759 break; 1760 case AF_APPLETALK: 1761 printf("%s: atalk %s; ", 1762 which, atalk_ntoa(su->sat.sat_addr)); 1763 break; 1764 #ifdef NS 1765 case AF_NS: 1766 printf("%s: xns %s; ", 1767 which, ns_ntoa(su->sns.sns_addr)); 1768 break; 1769 #endif 1770 } 1771 fflush(stdout); 1772 } 1773 1774 /* States*/ 1775 #define VIRGIN 0 1776 #define GOTONE 1 1777 #define GOTTWO 2 1778 /* Inputs */ 1779 #define DIGIT (4*0) 1780 #define END (4*1) 1781 #define DELIM (4*2) 1782 1783 static void 1784 sockaddr(char *addr, struct sockaddr *sa) 1785 { 1786 char *cp = (char *)sa; 1787 int size = sa->sa_len; 1788 char *cplim = cp + size; 1789 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1790 1791 memset(cp, 0, size); 1792 cp++; 1793 do { 1794 if ((*addr >= '0') && (*addr <= '9')) { 1795 new = *addr - '0'; 1796 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1797 new = *addr - 'a' + 10; 1798 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1799 new = *addr - 'A' + 10; 1800 } else if (*addr == '\0') 1801 state |= END; 1802 else 1803 state |= DELIM; 1804 addr++; 1805 switch (state /* | INPUT */) { 1806 case GOTTWO | DIGIT: 1807 *cp++ = byte; /*FALLTHROUGH*/ 1808 case VIRGIN | DIGIT: 1809 state = GOTONE; byte = new; continue; 1810 case GOTONE | DIGIT: 1811 state = GOTTWO; byte = new + (byte << 4); continue; 1812 default: /* | DELIM */ 1813 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1814 case GOTONE | END: 1815 case GOTTWO | END: 1816 *cp++ = byte; /* FALLTHROUGH */ 1817 case VIRGIN | END: 1818 break; 1819 } 1820 break; 1821 } while (cp < cplim); 1822 sa->sa_len = cp - (char *)sa; 1823 } 1824 1825 static int 1826 atalk_aton(const char *text, struct at_addr *addr) 1827 { 1828 u_int net, node; 1829 1830 if (sscanf(text, "%u.%u", &net, &node) != 2 1831 || net > 0xffff || node > 0xff) 1832 return(0); 1833 addr->s_net = htons(net); 1834 addr->s_node = node; 1835 return(1); 1836 } 1837 1838 static char * 1839 atalk_ntoa(struct at_addr at) 1840 { 1841 static char buf[20]; 1842 1843 snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1844 return(buf); 1845 } 1846