1 /* 2 * Copyright (c) 1983, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/file.h> 46 #include <sys/socket.h> 47 #include <sys/ioctl.h> 48 #include <sys/sysctl.h> 49 #include <sys/types.h> 50 51 #include <net/if.h> 52 #include <net/route.h> 53 #include <net/if_dl.h> 54 #include <netinet/in.h> 55 #include <netinet/if_ether.h> 56 #include <netatalk/at.h> 57 #include <arpa/inet.h> 58 #include <netdb.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 struct keytab { 72 char *kt_cp; 73 int kt_i; 74 } keywords[] = { 75 #include "keywords.h" 76 {0, 0} 77 }; 78 79 struct ortentry route; 80 union sockunion { 81 struct sockaddr sa; 82 struct sockaddr_in sin; 83 #ifdef INET6 84 struct sockaddr_in6 sin6; 85 #endif 86 struct sockaddr_at sat; 87 struct sockaddr_dl sdl; 88 struct sockaddr_inarp sinarp; 89 struct sockaddr_storage ss; /* added to avoid memory overrun */ 90 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 91 92 typedef union sockunion *sup; 93 int pid, rtm_addrs; 94 int s; 95 int forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword(); 96 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 97 int locking, lockrest, debugonly; 98 struct rt_metrics rt_metrics; 99 u_long rtm_inits; 100 uid_t uid; 101 int atalk_aton(const char *, struct at_addr *); 102 char *atalk_ntoa(struct at_addr); 103 const char *routename(), *netname(); 104 void flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf(); 105 void print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr(); 106 #ifdef INET6 107 static int inet6_makenetandmask(struct sockaddr_in6 *, char *); 108 #endif 109 int getaddr(), rtmsg(), x25_makemask(); 110 int prefixlen(); 111 extern char *iso_ntoa(); 112 113 void usage(const char *) __dead2; 114 115 void 116 usage(cp) 117 const char *cp; 118 { 119 if (cp) 120 warnx("bad keyword: %s", cp); 121 (void) fprintf(stderr, 122 "usage: route [-dnqtv] command [[modifiers] args]\n"); 123 exit(EX_USAGE); 124 /* NOTREACHED */ 125 } 126 127 int 128 main(argc, argv) 129 int argc; 130 char **argv; 131 { 132 int ch; 133 134 if (argc < 2) 135 usage((char *)NULL); 136 137 while ((ch = getopt(argc, argv, "nqdtv")) != -1) 138 switch(ch) { 139 case 'n': 140 nflag = 1; 141 break; 142 case 'q': 143 qflag = 1; 144 break; 145 case 'v': 146 verbose = 1; 147 break; 148 case 't': 149 tflag = 1; 150 break; 151 case 'd': 152 debugonly = 1; 153 break; 154 case '?': 155 default: 156 usage((char *)NULL); 157 } 158 argc -= optind; 159 argv += optind; 160 161 pid = getpid(); 162 uid = geteuid(); 163 if (tflag) 164 s = open(_PATH_DEVNULL, O_WRONLY, 0); 165 else 166 s = socket(PF_ROUTE, SOCK_RAW, 0); 167 if (s < 0) 168 err(EX_OSERR, "socket"); 169 if (*argv) 170 switch (keyword(*argv)) { 171 case K_GET: 172 uid = 0; 173 /* FALLTHROUGH */ 174 175 case K_CHANGE: 176 case K_ADD: 177 case K_DEL: 178 case K_DELETE: 179 newroute(argc, argv); 180 /* NOTREACHED */ 181 182 case K_MONITOR: 183 monitor(); 184 /* NOTREACHED */ 185 186 case K_FLUSH: 187 flushroutes(argc, argv); 188 exit(0); 189 /* NOTREACHED */ 190 } 191 usage(*argv); 192 /* NOTREACHED */ 193 } 194 195 /* 196 * Purge all entries in the routing tables not 197 * associated with network interfaces. 198 */ 199 void 200 flushroutes(argc, argv) 201 int argc; 202 char *argv[]; 203 { 204 size_t needed; 205 int mib[6], rlen, seqno, count = 0; 206 char *buf, *next, *lim; 207 struct rt_msghdr *rtm; 208 209 if (uid && !debugonly) { 210 errx(EX_NOPERM, "must be root to alter routing table"); 211 } 212 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 213 if (argc > 1) { 214 argv++; 215 if (argc == 2 && **argv == '-') 216 switch (keyword(*argv + 1)) { 217 case K_INET: 218 af = AF_INET; 219 break; 220 #ifdef INET6 221 case K_INET6: 222 af = AF_INET6; 223 break; 224 #endif 225 case K_ATALK: 226 af = AF_APPLETALK; 227 break; 228 case K_LINK: 229 af = AF_LINK; 230 break; 231 default: 232 goto bad; 233 } else 234 bad: usage(*argv); 235 } 236 retry: 237 mib[0] = CTL_NET; 238 mib[1] = PF_ROUTE; 239 mib[2] = 0; /* protocol */ 240 mib[3] = 0; /* wildcard address family */ 241 mib[4] = NET_RT_DUMP; 242 mib[5] = 0; /* no flags */ 243 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 244 err(EX_OSERR, "route-sysctl-estimate"); 245 if ((buf = malloc(needed)) == NULL) 246 errx(EX_OSERR, "malloc failed"); 247 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 248 if (errno == ENOMEM && count++ < 10) { 249 warnx("Routing table grew, retrying"); 250 sleep(1); 251 free(buf); 252 goto retry; 253 } 254 err(EX_OSERR, "route-sysctl-get"); 255 } 256 lim = buf + needed; 257 if (verbose) 258 (void) printf("Examining routing table from sysctl\n"); 259 seqno = 0; /* ??? */ 260 for (next = buf; next < lim; next += rtm->rtm_msglen) { 261 rtm = (struct rt_msghdr *)next; 262 if (verbose) 263 print_rtmsg(rtm, rtm->rtm_msglen); 264 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 265 continue; 266 if (af) { 267 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 268 269 if (sa->sa_family != af) 270 continue; 271 } 272 if (debugonly) 273 continue; 274 rtm->rtm_type = RTM_DELETE; 275 rtm->rtm_seq = seqno; 276 rlen = write(s, next, rtm->rtm_msglen); 277 if (rlen < 0 && errno == EPERM) 278 err(1, "write to routing socket"); 279 if (rlen < (int)rtm->rtm_msglen) { 280 warn("write to routing socket"); 281 (void) printf("got only %d for rlen\n", rlen); 282 free(buf); 283 goto retry; 284 break; 285 } 286 seqno++; 287 if (qflag) 288 continue; 289 if (verbose) 290 print_rtmsg(rtm, rlen); 291 else { 292 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 293 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 294 routename(sa) : netname(sa)); 295 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 296 (void) printf("%-20.20s ", routename(sa)); 297 (void) printf("done\n"); 298 } 299 } 300 } 301 302 const char * 303 routename(sa) 304 struct sockaddr *sa; 305 { 306 char *cp; 307 static char line[MAXHOSTNAMELEN + 1]; 308 struct hostent *hp; 309 static char domain[MAXHOSTNAMELEN + 1]; 310 static int first = 1, n; 311 312 if (first) { 313 first = 0; 314 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 315 (cp = strchr(domain, '.'))) { 316 domain[MAXHOSTNAMELEN] = '\0'; 317 (void) strcpy(domain, cp + 1); 318 } else 319 domain[0] = 0; 320 } 321 322 if (sa->sa_len == 0) 323 strcpy(line, "default"); 324 else switch (sa->sa_family) { 325 326 case AF_INET: 327 { struct in_addr in; 328 in = ((struct sockaddr_in *)sa)->sin_addr; 329 330 cp = 0; 331 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 332 cp = "default"; 333 if (cp == 0 && !nflag) { 334 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 335 AF_INET); 336 if (hp) { 337 if ((cp = strchr(hp->h_name, '.')) && 338 !strcmp(cp + 1, domain)) 339 *cp = 0; 340 cp = hp->h_name; 341 } 342 } 343 if (cp) { 344 strncpy(line, cp, sizeof(line) - 1); 345 line[sizeof(line) - 1] = '\0'; 346 } else 347 (void) sprintf(line, "%s", inet_ntoa(in)); 348 break; 349 } 350 351 #ifdef INET6 352 case AF_INET6: 353 { 354 struct sockaddr_in6 sin6; /* use static var for safety */ 355 int niflags = 0; 356 357 memset(&sin6, 0, sizeof(sin6)); 358 memcpy(&sin6, sa, sa->sa_len); 359 sin6.sin6_len = sizeof(struct sockaddr_in6); 360 sin6.sin6_family = AF_INET6; 361 #ifdef __KAME__ 362 if (sa->sa_len == sizeof(struct sockaddr_in6) && 363 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 364 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 365 sin6.sin6_scope_id == 0) { 366 sin6.sin6_scope_id = 367 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 368 sin6.sin6_addr.s6_addr[2] = 0; 369 sin6.sin6_addr.s6_addr[3] = 0; 370 } 371 #endif 372 if (nflag) 373 niflags |= NI_NUMERICHOST; 374 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 375 line, sizeof(line), NULL, 0, niflags) != 0) 376 strncpy(line, "invalid", sizeof(line)); 377 378 return(line); 379 } 380 #endif 381 382 case AF_APPLETALK: 383 (void) snprintf(line, sizeof(line), "atalk %s", 384 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 385 break; 386 387 case AF_LINK: 388 return (link_ntoa((struct sockaddr_dl *)sa)); 389 390 default: 391 { u_short *s = (u_short *)sa; 392 u_short *slim = s + ((sa->sa_len + 1) >> 1); 393 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 394 char *cpe = line + sizeof(line); 395 396 while (++s < slim && cp < cpe) /* start with sa->sa_data */ 397 if ((n = snprintf(cp, cpe - cp, " %x", *s)) > 0) 398 cp += n; 399 else 400 *cp = '\0'; 401 break; 402 } 403 } 404 return (line); 405 } 406 407 /* 408 * Return the name of the network whose address is given. 409 * The address is assumed to be that of a net or subnet, not a host. 410 */ 411 const char * 412 netname(sa) 413 struct sockaddr *sa; 414 { 415 char *cp = 0; 416 static char line[MAXHOSTNAMELEN + 1]; 417 struct netent *np = 0; 418 u_long net, mask; 419 u_long i; 420 int n, subnetshift; 421 422 switch (sa->sa_family) { 423 424 case AF_INET: 425 { struct in_addr in; 426 in = ((struct sockaddr_in *)sa)->sin_addr; 427 428 i = in.s_addr = ntohl(in.s_addr); 429 if (in.s_addr == 0) 430 cp = "default"; 431 else if (!nflag) { 432 if (IN_CLASSA(i)) { 433 mask = IN_CLASSA_NET; 434 subnetshift = 8; 435 } else if (IN_CLASSB(i)) { 436 mask = IN_CLASSB_NET; 437 subnetshift = 8; 438 } else { 439 mask = IN_CLASSC_NET; 440 subnetshift = 4; 441 } 442 /* 443 * If there are more bits than the standard mask 444 * would suggest, subnets must be in use. 445 * Guess at the subnet mask, assuming reasonable 446 * width subnet fields. 447 */ 448 while (in.s_addr &~ mask) 449 mask = (long)mask >> subnetshift; 450 net = in.s_addr & mask; 451 while ((mask & 1) == 0) 452 mask >>= 1, net >>= 1; 453 np = getnetbyaddr(net, AF_INET); 454 if (np) 455 cp = np->n_name; 456 } 457 #define C(x) (unsigned)((x) & 0xff) 458 if (cp) 459 strncpy(line, cp, sizeof(line)); 460 else if ((in.s_addr & 0xffffff) == 0) 461 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 462 else if ((in.s_addr & 0xffff) == 0) 463 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 464 C(in.s_addr >> 16)); 465 else if ((in.s_addr & 0xff) == 0) 466 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 467 C(in.s_addr >> 16), C(in.s_addr >> 8)); 468 else 469 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 470 C(in.s_addr >> 16), C(in.s_addr >> 8), 471 C(in.s_addr)); 472 #undef C 473 break; 474 } 475 476 #ifdef INET6 477 case AF_INET6: 478 { 479 struct sockaddr_in6 sin6; /* use static var for safety */ 480 int niflags = 0; 481 482 memset(&sin6, 0, sizeof(sin6)); 483 memcpy(&sin6, sa, sa->sa_len); 484 sin6.sin6_len = sizeof(struct sockaddr_in6); 485 sin6.sin6_family = AF_INET6; 486 #ifdef __KAME__ 487 if (sa->sa_len == sizeof(struct sockaddr_in6) && 488 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 489 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 490 sin6.sin6_scope_id == 0) { 491 sin6.sin6_scope_id = 492 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 493 sin6.sin6_addr.s6_addr[2] = 0; 494 sin6.sin6_addr.s6_addr[3] = 0; 495 } 496 #endif 497 if (nflag) 498 niflags |= NI_NUMERICHOST; 499 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 500 line, sizeof(line), NULL, 0, niflags) != 0) 501 strncpy(line, "invalid", sizeof(line)); 502 503 return(line); 504 } 505 #endif 506 507 case AF_APPLETALK: 508 (void) snprintf(line, sizeof(line), "atalk %s", 509 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 510 break; 511 512 case AF_LINK: 513 return (link_ntoa((struct sockaddr_dl *)sa)); 514 515 516 default: 517 { u_short *s = (u_short *)sa->sa_data; 518 u_short *slim = s + ((sa->sa_len + 1)>>1); 519 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 520 char *cpe = line + sizeof(line); 521 522 while (s < slim && cp < cpe) 523 if ((n = snprintf(cp, cpe - cp, " %x", *s++)) > 0) 524 cp += n; 525 else 526 *cp = '\0'; 527 break; 528 } 529 } 530 return (line); 531 } 532 533 void 534 set_metric(value, key) 535 char *value; 536 int key; 537 { 538 int flag = 0; 539 u_long noval, *valp = &noval; 540 541 switch (key) { 542 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 543 caseof(K_MTU, RTV_MTU, rmx_mtu); 544 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 545 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 546 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 547 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 548 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 549 caseof(K_RTT, RTV_RTT, rmx_rtt); 550 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 551 } 552 rtm_inits |= flag; 553 if (lockrest || locking) 554 rt_metrics.rmx_locks |= flag; 555 if (locking) 556 locking = 0; 557 *valp = atoi(value); 558 } 559 560 void 561 newroute(argc, argv) 562 int argc; 563 char **argv; 564 { 565 char *cmd, *dest = "", *gateway = "", *err; 566 int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC; 567 int key; 568 struct hostent *hp = 0; 569 570 if (uid) { 571 errx(EX_NOPERM, "must be root to alter routing table"); 572 } 573 cmd = argv[0]; 574 if (*cmd != 'g') 575 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 576 while (--argc > 0) { 577 if (**(++argv)== '-') { 578 switch (key = keyword(1 + *argv)) { 579 case K_LINK: 580 af = AF_LINK; 581 aflen = sizeof(struct sockaddr_dl); 582 break; 583 case K_INET: 584 af = AF_INET; 585 aflen = sizeof(struct sockaddr_in); 586 break; 587 #ifdef INET6 588 case K_INET6: 589 af = AF_INET6; 590 aflen = sizeof(struct sockaddr_in6); 591 break; 592 #endif 593 case K_ATALK: 594 af = AF_APPLETALK; 595 aflen = sizeof(struct sockaddr_at); 596 break; 597 case K_SA: 598 af = PF_ROUTE; 599 aflen = sizeof(union sockunion); 600 break; 601 case K_IFACE: 602 case K_INTERFACE: 603 iflag++; 604 break; 605 case K_NOSTATIC: 606 flags &= ~RTF_STATIC; 607 break; 608 case K_LOCK: 609 locking = 1; 610 break; 611 case K_LOCKREST: 612 lockrest = 1; 613 break; 614 case K_HOST: 615 forcehost++; 616 break; 617 case K_REJECT: 618 flags |= RTF_REJECT; 619 break; 620 case K_BLACKHOLE: 621 flags |= RTF_BLACKHOLE; 622 break; 623 case K_PROTO1: 624 flags |= RTF_PROTO1; 625 break; 626 case K_PROTO2: 627 flags |= RTF_PROTO2; 628 break; 629 case K_PROXY: 630 proxy = 1; 631 break; 632 case K_XRESOLVE: 633 flags |= RTF_XRESOLVE; 634 break; 635 case K_STATIC: 636 flags |= RTF_STATIC; 637 break; 638 case K_IFA: 639 if (!--argc) 640 usage((char *)NULL); 641 (void) getaddr(RTA_IFA, *++argv, 0); 642 break; 643 case K_IFP: 644 if (!--argc) 645 usage((char *)NULL); 646 (void) getaddr(RTA_IFP, *++argv, 0); 647 break; 648 case K_GENMASK: 649 if (!--argc) 650 usage((char *)NULL); 651 (void) getaddr(RTA_GENMASK, *++argv, 0); 652 break; 653 case K_GATEWAY: 654 if (!--argc) 655 usage((char *)NULL); 656 (void) getaddr(RTA_GATEWAY, *++argv, 0); 657 break; 658 case K_DST: 659 if (!--argc) 660 usage((char *)NULL); 661 ishost = getaddr(RTA_DST, *++argv, &hp); 662 dest = *argv; 663 break; 664 case K_NETMASK: 665 if (!--argc) 666 usage((char *)NULL); 667 (void) getaddr(RTA_NETMASK, *++argv, 0); 668 /* FALLTHROUGH */ 669 case K_NET: 670 forcenet++; 671 break; 672 case K_PREFIXLEN: 673 if (!--argc) 674 usage((char *)NULL); 675 if (prefixlen(*++argv) == -1) { 676 forcenet = 0; 677 ishost = 1; 678 } else { 679 forcenet = 1; 680 ishost = 0; 681 } 682 break; 683 case K_MTU: 684 case K_HOPCOUNT: 685 case K_EXPIRE: 686 case K_RECVPIPE: 687 case K_SENDPIPE: 688 case K_SSTHRESH: 689 case K_RTT: 690 case K_RTTVAR: 691 if (!--argc) 692 usage((char *)NULL); 693 set_metric(*++argv, key); 694 break; 695 default: 696 usage(1+*argv); 697 } 698 } else { 699 if ((rtm_addrs & RTA_DST) == 0) { 700 dest = *argv; 701 ishost = getaddr(RTA_DST, *argv, &hp); 702 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 703 gateway = *argv; 704 (void) getaddr(RTA_GATEWAY, *argv, &hp); 705 } else { 706 (void) getaddr(RTA_NETMASK, *argv, 0); 707 forcenet = 1; 708 } 709 } 710 } 711 if (forcehost) { 712 ishost = 1; 713 #ifdef INET6 714 if (af == AF_INET6) { 715 rtm_addrs &= ~RTA_NETMASK; 716 memset((void *)&so_mask, 0, sizeof(so_mask)); 717 } 718 #endif 719 } 720 if (forcenet) 721 ishost = 0; 722 flags |= RTF_UP; 723 if (ishost) 724 flags |= RTF_HOST; 725 if (iflag == 0) 726 flags |= RTF_GATEWAY; 727 if (proxy) { 728 so_dst.sinarp.sin_other = SIN_PROXY; 729 flags |= RTF_ANNOUNCE; 730 } 731 for (attempts = 1; ; attempts++) { 732 errno = 0; 733 if ((ret = rtmsg(*cmd, flags)) == 0) 734 break; 735 if (errno != ENETUNREACH && errno != ESRCH) 736 break; 737 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 738 hp->h_addr_list++; 739 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 740 MIN(hp->h_length, sizeof(so_gate.sin.sin_addr))); 741 } else 742 break; 743 } 744 if (*cmd == 'g') 745 exit(ret != 0); 746 if (!qflag) { 747 oerrno = errno; 748 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 749 if (*gateway) { 750 (void) printf(": gateway %s", gateway); 751 if (attempts > 1 && ret == 0 && af == AF_INET) 752 (void) printf(" (%s)", 753 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 754 } 755 if (ret == 0) { 756 (void) printf("\n"); 757 } else { 758 switch (oerrno) { 759 case ESRCH: 760 err = "not in table"; 761 break; 762 case EBUSY: 763 err = "entry in use"; 764 break; 765 case ENOBUFS: 766 err = "not enough memory"; 767 break; 768 case EADDRINUSE: 769 /* handle recursion avoidance in rt_setgate() */ 770 err = "gateway uses the same route"; 771 break; 772 case EEXIST: 773 err = "route already in table"; 774 break; 775 default: 776 err = strerror(oerrno); 777 break; 778 } 779 (void) printf(": %s\n", err); 780 } 781 } 782 exit(ret != 0); 783 } 784 785 void 786 inet_makenetandmask(net, sin, bits) 787 u_long net, bits; 788 struct sockaddr_in *sin; 789 { 790 u_long addr, mask = 0; 791 char *cp; 792 793 rtm_addrs |= RTA_NETMASK; 794 /* 795 * XXX: This approach unable to handle 0.0.0.1/32 correctly 796 * as inet_network() converts 0.0.0.1 and 1 equally. 797 */ 798 if (net <= 0xff) 799 addr = net << IN_CLASSA_NSHIFT; 800 else if (net <= 0xffff) 801 addr = net << IN_CLASSB_NSHIFT; 802 else if (net <= 0xffffff) 803 addr = net << IN_CLASSC_NSHIFT; 804 else 805 addr = net; 806 807 if (bits != 0) 808 mask = 0xffffffff << (32 - bits); 809 else if (net == 0) 810 mask = 0; 811 else if (IN_CLASSA(addr)) 812 mask = IN_CLASSA_NET; 813 else if (IN_CLASSB(addr)) 814 mask = IN_CLASSB_NET; 815 else if (IN_CLASSC(addr)) 816 mask = IN_CLASSC_NET; 817 else if (IN_MULTICAST(addr)) 818 mask = IN_CLASSD_NET; 819 else 820 mask = 0xffffffff; 821 822 sin->sin_addr.s_addr = htonl(addr); 823 sin = &so_mask.sin; 824 sin->sin_addr.s_addr = htonl(mask); 825 sin->sin_len = 0; 826 sin->sin_family = 0; 827 cp = (char *)(&sin->sin_addr + 1); 828 while (*--cp == 0 && cp > (char *)sin) 829 ; 830 sin->sin_len = 1 + cp - (char *)sin; 831 } 832 833 #ifdef INET6 834 /* 835 * XXX the function may need more improvement... 836 */ 837 static int 838 inet6_makenetandmask(sin6, plen) 839 struct sockaddr_in6 *sin6; 840 char *plen; 841 { 842 struct in6_addr in6; 843 844 if (!plen) { 845 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 846 sin6->sin6_scope_id == 0) { 847 plen = "0"; 848 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 849 /* aggregatable global unicast - RFC2374 */ 850 memset(&in6, 0, sizeof(in6)); 851 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 852 &in6.s6_addr[8], 8)) 853 plen = "64"; 854 } 855 } 856 857 if (!plen || strcmp(plen, "128") == 0) 858 return 1; 859 rtm_addrs |= RTA_NETMASK; 860 (void)prefixlen(plen); 861 return 0; 862 } 863 #endif 864 865 /* 866 * Interpret an argument as a network address of some kind, 867 * returning 1 if a host address, 0 if a network address. 868 */ 869 int 870 getaddr(which, s, hpp) 871 int which; 872 char *s; 873 struct hostent **hpp; 874 { 875 sup su; 876 struct hostent *hp; 877 struct netent *np; 878 u_long val; 879 char *q; 880 int afamily; /* local copy of af so we can change it */ 881 882 if (af == 0) { 883 af = AF_INET; 884 aflen = sizeof(struct sockaddr_in); 885 } 886 afamily = af; 887 rtm_addrs |= which; 888 switch (which) { 889 case RTA_DST: 890 su = &so_dst; 891 break; 892 case RTA_GATEWAY: 893 su = &so_gate; 894 if (iflag) { 895 struct ifaddrs *ifap, *ifa; 896 struct sockaddr_dl *sdl = NULL; 897 898 if (getifaddrs(&ifap)) 899 err(1, "getifaddrs"); 900 901 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 902 if (ifa->ifa_addr->sa_family != AF_LINK) 903 continue; 904 905 if (strcmp(s, ifa->ifa_name)) 906 continue; 907 908 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 909 } 910 /* If we found it, then use it */ 911 if (sdl) { 912 /* 913 * Copy is safe since we have a 914 * sockaddr_storage member in sockunion{}. 915 * Note that we need to copy before calling 916 * freeifaddrs(). 917 */ 918 memcpy(&su->sdl, sdl, sdl->sdl_len); 919 } 920 freeifaddrs(ifap); 921 if (sdl) 922 return(1); 923 } 924 break; 925 case RTA_NETMASK: 926 su = &so_mask; 927 break; 928 case RTA_GENMASK: 929 su = &so_genmask; 930 break; 931 case RTA_IFP: 932 su = &so_ifp; 933 afamily = AF_LINK; 934 break; 935 case RTA_IFA: 936 su = &so_ifa; 937 break; 938 default: 939 usage("internal error"); 940 /*NOTREACHED*/ 941 } 942 su->sa.sa_len = aflen; 943 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 944 if (strcmp(s, "default") == 0) { 945 /* 946 * Default is net 0.0.0.0/0 947 */ 948 switch (which) { 949 case RTA_DST: 950 forcenet++; 951 #if 0 952 bzero(su, sizeof(*su)); /* for readability */ 953 #endif 954 (void) getaddr(RTA_NETMASK, s, 0); 955 break; 956 #if 0 957 case RTA_NETMASK: 958 case RTA_GENMASK: 959 bzero(su, sizeof(*su)); /* for readability */ 960 #endif 961 } 962 return (0); 963 } 964 switch (afamily) { 965 #ifdef INET6 966 case AF_INET6: 967 { 968 struct addrinfo hints, *res; 969 int ecode; 970 971 q = NULL; 972 if (which == RTA_DST && (q = strchr(s, '/')) != NULL) 973 *q = '\0'; 974 memset(&hints, 0, sizeof(hints)); 975 hints.ai_family = afamily; /*AF_INET6*/ 976 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 977 ecode = getaddrinfo(s, NULL, &hints, &res); 978 if (ecode != 0 || res->ai_family != AF_INET6 || 979 res->ai_addrlen != sizeof(su->sin6)) { 980 (void) fprintf(stderr, "%s: %s\n", s, 981 gai_strerror(ecode)); 982 exit(1); 983 } 984 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 985 #ifdef __KAME__ 986 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 987 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 988 su->sin6.sin6_scope_id) { 989 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 990 htons(su->sin6.sin6_scope_id); 991 su->sin6.sin6_scope_id = 0; 992 } 993 #endif 994 freeaddrinfo(res); 995 if (q != NULL) 996 *q++ = '/'; 997 if (which == RTA_DST) 998 return (inet6_makenetandmask(&su->sin6, q)); 999 return (0); 1000 } 1001 #endif /* INET6 */ 1002 1003 case AF_APPLETALK: 1004 if (!atalk_aton(s, &su->sat.sat_addr)) 1005 errx(EX_NOHOST, "bad address: %s", s); 1006 rtm_addrs |= RTA_NETMASK; 1007 return(forcehost || su->sat.sat_addr.s_node != 0); 1008 1009 case AF_LINK: 1010 link_addr(s, &su->sdl); 1011 return (1); 1012 1013 1014 case PF_ROUTE: 1015 su->sa.sa_len = sizeof(*su); 1016 sockaddr(s, &su->sa); 1017 return (1); 1018 1019 case AF_INET: 1020 default: 1021 break; 1022 } 1023 1024 if (hpp == NULL) 1025 hpp = &hp; 1026 *hpp = NULL; 1027 1028 q = strchr(s,'/'); 1029 if (q && which == RTA_DST) { 1030 *q = '\0'; 1031 if ((val = inet_network(s)) != INADDR_NONE) { 1032 inet_makenetandmask( 1033 val, &su->sin, strtoul(q+1, 0, 0)); 1034 return (0); 1035 } 1036 *q = '/'; 1037 } 1038 if ((which != RTA_DST || forcenet == 0) && 1039 inet_aton(s, &su->sin.sin_addr)) { 1040 val = su->sin.sin_addr.s_addr; 1041 if (which != RTA_DST || forcehost || 1042 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1043 return (1); 1044 else { 1045 val = ntohl(val); 1046 goto netdone; 1047 } 1048 } 1049 if (which == RTA_DST && forcehost == 0 && 1050 ((val = inet_network(s)) != INADDR_NONE || 1051 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) { 1052 netdone: 1053 inet_makenetandmask(val, &su->sin, 0); 1054 return (0); 1055 } 1056 hp = gethostbyname(s); 1057 if (hp) { 1058 *hpp = hp; 1059 su->sin.sin_family = hp->h_addrtype; 1060 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1061 MIN(hp->h_length, sizeof(su->sin.sin_addr))); 1062 return (1); 1063 } 1064 errx(EX_NOHOST, "bad address: %s", s); 1065 } 1066 1067 int 1068 prefixlen(s) 1069 char *s; 1070 { 1071 int len = atoi(s), q, r; 1072 int max; 1073 char *p; 1074 1075 rtm_addrs |= RTA_NETMASK; 1076 switch (af) { 1077 #ifdef INET6 1078 case AF_INET6: 1079 max = 128; 1080 p = (char *)&so_mask.sin6.sin6_addr; 1081 break; 1082 #endif 1083 case AF_INET: 1084 max = 32; 1085 p = (char *)&so_mask.sin.sin_addr; 1086 break; 1087 default: 1088 (void) fprintf(stderr, "prefixlen not supported in this af\n"); 1089 exit(1); 1090 /*NOTREACHED*/ 1091 } 1092 1093 if (len < 0 || max < len) { 1094 (void) fprintf(stderr, "%s: bad value\n", s); 1095 exit(1); 1096 } 1097 1098 q = len >> 3; 1099 r = len & 7; 1100 so_mask.sa.sa_family = af; 1101 so_mask.sa.sa_len = aflen; 1102 memset((void *)p, 0, max / 8); 1103 if (q > 0) 1104 memset((void *)p, 0xff, q); 1105 if (r > 0) 1106 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1107 if (len == max) 1108 return -1; 1109 else 1110 return len; 1111 } 1112 1113 void 1114 interfaces() 1115 { 1116 size_t needed; 1117 int mib[6]; 1118 char *buf, *lim, *next, count = 0; 1119 struct rt_msghdr *rtm; 1120 1121 retry2: 1122 mib[0] = CTL_NET; 1123 mib[1] = PF_ROUTE; 1124 mib[2] = 0; /* protocol */ 1125 mib[3] = 0; /* wildcard address family */ 1126 mib[4] = NET_RT_IFLIST; 1127 mib[5] = 0; /* no flags */ 1128 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1129 err(EX_OSERR, "route-sysctl-estimate"); 1130 if ((buf = malloc(needed)) == NULL) 1131 errx(EX_OSERR, "malloc failed"); 1132 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 1133 if (errno == ENOMEM && count++ < 10) { 1134 warnx("Routing table grew, retrying"); 1135 sleep(1); 1136 free(buf); 1137 goto retry2; 1138 } 1139 err(EX_OSERR, "actual retrieval of interface table"); 1140 } 1141 lim = buf + needed; 1142 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1143 rtm = (struct rt_msghdr *)next; 1144 print_rtmsg(rtm, rtm->rtm_msglen); 1145 } 1146 } 1147 1148 void 1149 monitor() 1150 { 1151 int n; 1152 char msg[2048]; 1153 1154 verbose = 1; 1155 if (debugonly) { 1156 interfaces(); 1157 exit(0); 1158 } 1159 for(;;) { 1160 time_t now; 1161 n = read(s, msg, 2048); 1162 now = time(NULL); 1163 (void) printf("\ngot message of size %d on %s", n, ctime(&now)); 1164 print_rtmsg((struct rt_msghdr *)msg, n); 1165 } 1166 } 1167 1168 struct { 1169 struct rt_msghdr m_rtm; 1170 char m_space[512]; 1171 } m_rtmsg; 1172 1173 int 1174 rtmsg(cmd, flags) 1175 int cmd, flags; 1176 { 1177 static int seq; 1178 int rlen; 1179 char *cp = m_rtmsg.m_space; 1180 int l; 1181 1182 #define NEXTADDR(w, u) \ 1183 if (rtm_addrs & (w)) {\ 1184 l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\ 1185 if (verbose) sodump(&(u),#u);\ 1186 } 1187 1188 errno = 0; 1189 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1190 if (cmd == 'a') 1191 cmd = RTM_ADD; 1192 else if (cmd == 'c') 1193 cmd = RTM_CHANGE; 1194 else if (cmd == 'g') { 1195 cmd = RTM_GET; 1196 if (so_ifp.sa.sa_family == 0) { 1197 so_ifp.sa.sa_family = AF_LINK; 1198 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1199 rtm_addrs |= RTA_IFP; 1200 } 1201 } else 1202 cmd = RTM_DELETE; 1203 #define rtm m_rtmsg.m_rtm 1204 rtm.rtm_type = cmd; 1205 rtm.rtm_flags = flags; 1206 rtm.rtm_version = RTM_VERSION; 1207 rtm.rtm_seq = ++seq; 1208 rtm.rtm_addrs = rtm_addrs; 1209 rtm.rtm_rmx = rt_metrics; 1210 rtm.rtm_inits = rtm_inits; 1211 1212 if (rtm_addrs & RTA_NETMASK) 1213 mask_addr(); 1214 NEXTADDR(RTA_DST, so_dst); 1215 NEXTADDR(RTA_GATEWAY, so_gate); 1216 NEXTADDR(RTA_NETMASK, so_mask); 1217 NEXTADDR(RTA_GENMASK, so_genmask); 1218 NEXTADDR(RTA_IFP, so_ifp); 1219 NEXTADDR(RTA_IFA, so_ifa); 1220 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1221 if (verbose) 1222 print_rtmsg(&rtm, l); 1223 if (debugonly) 1224 return (0); 1225 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1226 if (errno == EPERM) 1227 err(1, "writing to routing socket"); 1228 warn("writing to routing socket"); 1229 return (-1); 1230 } 1231 if (cmd == RTM_GET) { 1232 do { 1233 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1234 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1235 if (l < 0) 1236 warn("read from routing socket"); 1237 else 1238 print_getmsg(&rtm, l); 1239 } 1240 #undef rtm 1241 return (0); 1242 } 1243 1244 void 1245 mask_addr() 1246 { 1247 int olen = so_mask.sa.sa_len; 1248 char *cp1 = olen + (char *)&so_mask, *cp2; 1249 1250 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1251 if (*--cp1 != 0) { 1252 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1253 break; 1254 } 1255 if ((rtm_addrs & RTA_DST) == 0) 1256 return; 1257 switch (so_dst.sa.sa_family) { 1258 case AF_INET: 1259 #ifdef INET6 1260 case AF_INET6: 1261 #endif 1262 case AF_APPLETALK: 1263 case 0: 1264 return; 1265 } 1266 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1267 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1268 while (cp2 > cp1) 1269 *--cp2 = 0; 1270 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1271 while (cp1 > so_dst.sa.sa_data) 1272 *--cp1 &= *--cp2; 1273 } 1274 1275 char *msgtypes[] = { 1276 "", 1277 "RTM_ADD: Add Route", 1278 "RTM_DELETE: Delete Route", 1279 "RTM_CHANGE: Change Metrics or flags", 1280 "RTM_GET: Report Metrics", 1281 "RTM_LOSING: Kernel Suspects Partitioning", 1282 "RTM_REDIRECT: Told to use different route", 1283 "RTM_MISS: Lookup failed on this address", 1284 "RTM_LOCK: fix specified metrics", 1285 "RTM_OLDADD: caused by SIOCADDRT", 1286 "RTM_OLDDEL: caused by SIOCDELRT", 1287 "RTM_RESOLVE: Route created by cloning", 1288 "RTM_NEWADDR: address being added to iface", 1289 "RTM_DELADDR: address being removed from iface", 1290 "RTM_IFINFO: iface status change", 1291 "RTM_NEWMADDR: new multicast group membership on iface", 1292 "RTM_DELMADDR: multicast group membership removed from iface", 1293 "RTM_IFANNOUNCE: interface arrival/departure", 1294 0, 1295 }; 1296 1297 char metricnames[] = 1298 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount" 1299 "\1mtu"; 1300 char routeflags[] = 1301 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT" 1302 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016" 1303 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE" 1304 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST"; 1305 char ifnetflags[] = 1306 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1307 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1308 "\017LINK2\020MULTICAST"; 1309 char addrnames[] = 1310 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1311 1312 void 1313 print_rtmsg(rtm, msglen) 1314 struct rt_msghdr *rtm; 1315 int msglen; 1316 { 1317 struct if_msghdr *ifm; 1318 struct ifa_msghdr *ifam; 1319 #ifdef RTM_NEWMADDR 1320 struct ifma_msghdr *ifmam; 1321 #endif 1322 struct if_announcemsghdr *ifan; 1323 char *state; 1324 1325 if (verbose == 0) 1326 return; 1327 if (rtm->rtm_version != RTM_VERSION) { 1328 (void) printf("routing message version %d not understood\n", 1329 rtm->rtm_version); 1330 return; 1331 } 1332 if (msgtypes[rtm->rtm_type] != NULL) 1333 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1334 else 1335 (void)printf("#%d: ", rtm->rtm_type); 1336 (void)printf("len %d, ", rtm->rtm_msglen); 1337 switch (rtm->rtm_type) { 1338 case RTM_IFINFO: 1339 ifm = (struct if_msghdr *)rtm; 1340 (void) printf("if# %d, ", ifm->ifm_index); 1341 switch (ifm->ifm_data.ifi_link_state) { 1342 case LINK_STATE_DOWN: 1343 state = "down"; 1344 break; 1345 case LINK_STATE_UP: 1346 state = "up"; 1347 break; 1348 default: 1349 state = "unknown"; 1350 break; 1351 } 1352 (void) printf("link: %s, flags:", state); 1353 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1354 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1355 break; 1356 case RTM_NEWADDR: 1357 case RTM_DELADDR: 1358 ifam = (struct ifa_msghdr *)rtm; 1359 (void) printf("metric %d, flags:", ifam->ifam_metric); 1360 bprintf(stdout, ifam->ifam_flags, routeflags); 1361 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1362 break; 1363 #ifdef RTM_NEWMADDR 1364 case RTM_NEWMADDR: 1365 case RTM_DELMADDR: 1366 ifmam = (struct ifma_msghdr *)rtm; 1367 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs); 1368 break; 1369 #endif 1370 case RTM_IFANNOUNCE: 1371 ifan = (struct if_announcemsghdr *)rtm; 1372 (void) printf("if# %d, what: ", ifan->ifan_index); 1373 switch (ifan->ifan_what) { 1374 case IFAN_ARRIVAL: 1375 printf("arrival"); 1376 break; 1377 case IFAN_DEPARTURE: 1378 printf("departure"); 1379 break; 1380 default: 1381 printf("#%d", ifan->ifan_what); 1382 break; 1383 } 1384 printf("\n"); 1385 break; 1386 1387 default: 1388 (void) printf("pid: %ld, seq %d, errno %d, flags:", 1389 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1390 bprintf(stdout, rtm->rtm_flags, routeflags); 1391 pmsg_common(rtm); 1392 } 1393 } 1394 1395 void 1396 print_getmsg(rtm, msglen) 1397 struct rt_msghdr *rtm; 1398 int msglen; 1399 { 1400 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1401 struct sockaddr_dl *ifp = NULL; 1402 struct sockaddr *sa; 1403 char *cp; 1404 int i; 1405 1406 (void) printf(" route to: %s\n", routename(&so_dst)); 1407 if (rtm->rtm_version != RTM_VERSION) { 1408 warnx("routing message version %d not understood", 1409 rtm->rtm_version); 1410 return; 1411 } 1412 if (rtm->rtm_msglen > msglen) { 1413 warnx("message length mismatch, in packet %d, returned %d", 1414 rtm->rtm_msglen, msglen); 1415 } 1416 if (rtm->rtm_errno) { 1417 errno = rtm->rtm_errno; 1418 warn("message indicates error %d", errno); 1419 return; 1420 } 1421 cp = ((char *)(rtm + 1)); 1422 if (rtm->rtm_addrs) 1423 for (i = 1; i; i <<= 1) 1424 if (i & rtm->rtm_addrs) { 1425 sa = (struct sockaddr *)cp; 1426 switch (i) { 1427 case RTA_DST: 1428 dst = sa; 1429 break; 1430 case RTA_GATEWAY: 1431 gate = sa; 1432 break; 1433 case RTA_NETMASK: 1434 mask = sa; 1435 break; 1436 case RTA_IFP: 1437 if (sa->sa_family == AF_LINK && 1438 ((struct sockaddr_dl *)sa)->sdl_nlen) 1439 ifp = (struct sockaddr_dl *)sa; 1440 break; 1441 } 1442 cp += SA_SIZE(sa); 1443 } 1444 if (dst && mask) 1445 mask->sa_family = dst->sa_family; /* XXX */ 1446 if (dst) 1447 (void)printf("destination: %s\n", routename(dst)); 1448 if (mask) { 1449 int savenflag = nflag; 1450 1451 nflag = 1; 1452 (void)printf(" mask: %s\n", routename(mask)); 1453 nflag = savenflag; 1454 } 1455 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1456 (void)printf(" gateway: %s\n", routename(gate)); 1457 if (ifp) 1458 (void)printf(" interface: %.*s\n", 1459 ifp->sdl_nlen, ifp->sdl_data); 1460 (void)printf(" flags: "); 1461 bprintf(stdout, rtm->rtm_flags, routeflags); 1462 1463 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1464 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1465 1466 (void) printf("\n%s\n", "\ 1467 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1468 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1469 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1470 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1471 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1472 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1473 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1474 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1475 if (rtm->rtm_rmx.rmx_expire) 1476 rtm->rtm_rmx.rmx_expire -= time(0); 1477 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1478 #undef lock 1479 #undef msec 1480 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1481 if (verbose) 1482 pmsg_common(rtm); 1483 else if (rtm->rtm_addrs &~ RTA_IGN) { 1484 (void) printf("sockaddrs: "); 1485 bprintf(stdout, rtm->rtm_addrs, addrnames); 1486 putchar('\n'); 1487 } 1488 #undef RTA_IGN 1489 } 1490 1491 void 1492 pmsg_common(rtm) 1493 struct rt_msghdr *rtm; 1494 { 1495 (void) printf("\nlocks: "); 1496 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1497 (void) printf(" inits: "); 1498 bprintf(stdout, rtm->rtm_inits, metricnames); 1499 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1500 } 1501 1502 void 1503 pmsg_addrs(cp, addrs) 1504 char *cp; 1505 int addrs; 1506 { 1507 struct sockaddr *sa; 1508 int i; 1509 1510 if (addrs == 0) { 1511 (void) putchar('\n'); 1512 return; 1513 } 1514 (void) printf("\nsockaddrs: "); 1515 bprintf(stdout, addrs, addrnames); 1516 (void) putchar('\n'); 1517 for (i = 1; i; i <<= 1) 1518 if (i & addrs) { 1519 sa = (struct sockaddr *)cp; 1520 (void) printf(" %s", routename(sa)); 1521 cp += SA_SIZE(sa); 1522 } 1523 (void) putchar('\n'); 1524 (void) fflush(stdout); 1525 } 1526 1527 void 1528 bprintf(fp, b, s) 1529 FILE *fp; 1530 int b; 1531 u_char *s; 1532 { 1533 int i; 1534 int gotsome = 0; 1535 1536 if (b == 0) 1537 return; 1538 while ((i = *s++) != 0) { 1539 if (b & (1 << (i-1))) { 1540 if (gotsome == 0) 1541 i = '<'; 1542 else 1543 i = ','; 1544 (void) putc(i, fp); 1545 gotsome = 1; 1546 for (; (i = *s) > 32; s++) 1547 (void) putc(i, fp); 1548 } else 1549 while (*s > 32) 1550 s++; 1551 } 1552 if (gotsome) 1553 (void) putc('>', fp); 1554 } 1555 1556 int 1557 keyword(cp) 1558 char *cp; 1559 { 1560 struct keytab *kt = keywords; 1561 1562 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1563 kt++; 1564 return kt->kt_i; 1565 } 1566 1567 void 1568 sodump(su, which) 1569 sup su; 1570 char *which; 1571 { 1572 switch (su->sa.sa_family) { 1573 case AF_LINK: 1574 (void) printf("%s: link %s; ", 1575 which, link_ntoa(&su->sdl)); 1576 break; 1577 case AF_INET: 1578 (void) printf("%s: inet %s; ", 1579 which, inet_ntoa(su->sin.sin_addr)); 1580 break; 1581 case AF_APPLETALK: 1582 (void) printf("%s: atalk %s; ", 1583 which, atalk_ntoa(su->sat.sat_addr)); 1584 break; 1585 } 1586 (void) fflush(stdout); 1587 } 1588 1589 /* States*/ 1590 #define VIRGIN 0 1591 #define GOTONE 1 1592 #define GOTTWO 2 1593 /* Inputs */ 1594 #define DIGIT (4*0) 1595 #define END (4*1) 1596 #define DELIM (4*2) 1597 1598 void 1599 sockaddr(addr, sa) 1600 char *addr; 1601 struct sockaddr *sa; 1602 { 1603 char *cp = (char *)sa; 1604 int size = sa->sa_len; 1605 char *cplim = cp + size; 1606 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1607 1608 memset(cp, 0, size); 1609 cp++; 1610 do { 1611 if ((*addr >= '0') && (*addr <= '9')) { 1612 new = *addr - '0'; 1613 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1614 new = *addr - 'a' + 10; 1615 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1616 new = *addr - 'A' + 10; 1617 } else if (*addr == 0) 1618 state |= END; 1619 else 1620 state |= DELIM; 1621 addr++; 1622 switch (state /* | INPUT */) { 1623 case GOTTWO | DIGIT: 1624 *cp++ = byte; /*FALLTHROUGH*/ 1625 case VIRGIN | DIGIT: 1626 state = GOTONE; byte = new; continue; 1627 case GOTONE | DIGIT: 1628 state = GOTTWO; byte = new + (byte << 4); continue; 1629 default: /* | DELIM */ 1630 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1631 case GOTONE | END: 1632 case GOTTWO | END: 1633 *cp++ = byte; /* FALLTHROUGH */ 1634 case VIRGIN | END: 1635 break; 1636 } 1637 break; 1638 } while (cp < cplim); 1639 sa->sa_len = cp - (char *)sa; 1640 } 1641 1642 int 1643 atalk_aton(const char *text, struct at_addr *addr) 1644 { 1645 u_int net, node; 1646 1647 if (sscanf(text, "%u.%u", &net, &node) != 2 1648 || net > 0xffff || node > 0xff) 1649 return(0); 1650 addr->s_net = htons(net); 1651 addr->s_node = node; 1652 return(1); 1653 } 1654 1655 char * 1656 atalk_ntoa(struct at_addr at) 1657 { 1658 static char buf[20]; 1659 1660 (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1661 return(buf); 1662 } 1663