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_DELETE: 178 newroute(argc, argv); 179 /* NOTREACHED */ 180 181 case K_MONITOR: 182 monitor(); 183 /* NOTREACHED */ 184 185 case K_FLUSH: 186 flushroutes(argc, argv); 187 exit(0); 188 /* NOTREACHED */ 189 } 190 usage(*argv); 191 /* NOTREACHED */ 192 } 193 194 /* 195 * Purge all entries in the routing tables not 196 * associated with network interfaces. 197 */ 198 void 199 flushroutes(argc, argv) 200 int argc; 201 char *argv[]; 202 { 203 size_t needed; 204 int mib[6], rlen, seqno, count = 0; 205 char *buf, *next, *lim; 206 struct rt_msghdr *rtm; 207 208 if (uid && !debugonly) { 209 errx(EX_NOPERM, "must be root to alter routing table"); 210 } 211 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 212 if (argc > 1) { 213 argv++; 214 if (argc == 2 && **argv == '-') 215 switch (keyword(*argv + 1)) { 216 case K_INET: 217 af = AF_INET; 218 break; 219 #ifdef INET6 220 case K_INET6: 221 af = AF_INET6; 222 break; 223 #endif 224 case K_ATALK: 225 af = AF_APPLETALK; 226 break; 227 case K_LINK: 228 af = AF_LINK; 229 break; 230 default: 231 goto bad; 232 } else 233 bad: usage(*argv); 234 } 235 retry: 236 mib[0] = CTL_NET; 237 mib[1] = PF_ROUTE; 238 mib[2] = 0; /* protocol */ 239 mib[3] = 0; /* wildcard address family */ 240 mib[4] = NET_RT_DUMP; 241 mib[5] = 0; /* no flags */ 242 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 243 err(EX_OSERR, "route-sysctl-estimate"); 244 if ((buf = malloc(needed)) == NULL) 245 errx(EX_OSERR, "malloc failed"); 246 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 247 if (errno == ENOMEM && count++ < 10) { 248 warnx("Routing table grew, retrying"); 249 sleep(1); 250 free(buf); 251 goto retry; 252 } 253 err(EX_OSERR, "route-sysctl-get"); 254 } 255 lim = buf + needed; 256 if (verbose) 257 (void) printf("Examining routing table from sysctl\n"); 258 seqno = 0; /* ??? */ 259 for (next = buf; next < lim; next += rtm->rtm_msglen) { 260 rtm = (struct rt_msghdr *)next; 261 if (verbose) 262 print_rtmsg(rtm, rtm->rtm_msglen); 263 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 264 continue; 265 if (af) { 266 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 267 268 if (sa->sa_family != af) 269 continue; 270 } 271 if (debugonly) 272 continue; 273 rtm->rtm_type = RTM_DELETE; 274 rtm->rtm_seq = seqno; 275 rlen = write(s, next, rtm->rtm_msglen); 276 if (rlen < 0 && errno == EPERM) 277 err(1, "write to routing socket"); 278 if (rlen < (int)rtm->rtm_msglen) { 279 warn("write to routing socket"); 280 (void) printf("got only %d for rlen\n", rlen); 281 free(buf); 282 goto retry; 283 break; 284 } 285 seqno++; 286 if (qflag) 287 continue; 288 if (verbose) 289 print_rtmsg(rtm, rlen); 290 else { 291 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 292 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 293 routename(sa) : netname(sa)); 294 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 295 (void) printf("%-20.20s ", routename(sa)); 296 (void) printf("done\n"); 297 } 298 } 299 } 300 301 const char * 302 routename(sa) 303 struct sockaddr *sa; 304 { 305 char *cp; 306 static char line[MAXHOSTNAMELEN + 1]; 307 struct hostent *hp; 308 static char domain[MAXHOSTNAMELEN + 1]; 309 static int first = 1, n; 310 311 if (first) { 312 first = 0; 313 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 314 (cp = strchr(domain, '.'))) { 315 domain[MAXHOSTNAMELEN] = '\0'; 316 (void) strcpy(domain, cp + 1); 317 } else 318 domain[0] = 0; 319 } 320 321 if (sa->sa_len == 0) 322 strcpy(line, "default"); 323 else switch (sa->sa_family) { 324 325 case AF_INET: 326 { struct in_addr in; 327 in = ((struct sockaddr_in *)sa)->sin_addr; 328 329 cp = 0; 330 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 331 cp = "default"; 332 if (cp == 0 && !nflag) { 333 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 334 AF_INET); 335 if (hp) { 336 if ((cp = strchr(hp->h_name, '.')) && 337 !strcmp(cp + 1, domain)) 338 *cp = 0; 339 cp = hp->h_name; 340 } 341 } 342 if (cp) { 343 strncpy(line, cp, sizeof(line) - 1); 344 line[sizeof(line) - 1] = '\0'; 345 } else 346 (void) sprintf(line, "%s", inet_ntoa(in)); 347 break; 348 } 349 350 #ifdef INET6 351 case AF_INET6: 352 { 353 struct sockaddr_in6 sin6; /* use static var for safety */ 354 int niflags = 0; 355 356 memset(&sin6, 0, sizeof(sin6)); 357 memcpy(&sin6, sa, sa->sa_len); 358 sin6.sin6_len = sizeof(struct sockaddr_in6); 359 sin6.sin6_family = AF_INET6; 360 #ifdef __KAME__ 361 if (sa->sa_len == sizeof(struct sockaddr_in6) && 362 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 363 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 364 sin6.sin6_scope_id == 0) { 365 sin6.sin6_scope_id = 366 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 367 sin6.sin6_addr.s6_addr[2] = 0; 368 sin6.sin6_addr.s6_addr[3] = 0; 369 } 370 #endif 371 if (nflag) 372 niflags |= NI_NUMERICHOST; 373 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 374 line, sizeof(line), NULL, 0, niflags) != 0) 375 strncpy(line, "invalid", sizeof(line)); 376 377 return(line); 378 } 379 #endif 380 381 case AF_APPLETALK: 382 (void) snprintf(line, sizeof(line), "atalk %s", 383 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 384 break; 385 386 case AF_LINK: 387 return (link_ntoa((struct sockaddr_dl *)sa)); 388 389 default: 390 { u_short *s = (u_short *)sa; 391 u_short *slim = s + ((sa->sa_len + 1) >> 1); 392 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 393 char *cpe = line + sizeof(line); 394 395 while (++s < slim && cp < cpe) /* start with sa->sa_data */ 396 if ((n = snprintf(cp, cpe - cp, " %x", *s)) > 0) 397 cp += n; 398 else 399 *cp = '\0'; 400 break; 401 } 402 } 403 return (line); 404 } 405 406 /* 407 * Return the name of the network whose address is given. 408 * The address is assumed to be that of a net or subnet, not a host. 409 */ 410 const char * 411 netname(sa) 412 struct sockaddr *sa; 413 { 414 char *cp = 0; 415 static char line[MAXHOSTNAMELEN + 1]; 416 struct netent *np = 0; 417 u_long net, mask; 418 u_long i; 419 int n, subnetshift; 420 421 switch (sa->sa_family) { 422 423 case AF_INET: 424 { struct in_addr in; 425 in = ((struct sockaddr_in *)sa)->sin_addr; 426 427 i = in.s_addr = ntohl(in.s_addr); 428 if (in.s_addr == 0) 429 cp = "default"; 430 else if (!nflag) { 431 if (IN_CLASSA(i)) { 432 mask = IN_CLASSA_NET; 433 subnetshift = 8; 434 } else if (IN_CLASSB(i)) { 435 mask = IN_CLASSB_NET; 436 subnetshift = 8; 437 } else { 438 mask = IN_CLASSC_NET; 439 subnetshift = 4; 440 } 441 /* 442 * If there are more bits than the standard mask 443 * would suggest, subnets must be in use. 444 * Guess at the subnet mask, assuming reasonable 445 * width subnet fields. 446 */ 447 while (in.s_addr &~ mask) 448 mask = (long)mask >> subnetshift; 449 net = in.s_addr & mask; 450 while ((mask & 1) == 0) 451 mask >>= 1, net >>= 1; 452 np = getnetbyaddr(net, AF_INET); 453 if (np) 454 cp = np->n_name; 455 } 456 #define C(x) (unsigned)((x) & 0xff) 457 if (cp) 458 strncpy(line, cp, sizeof(line)); 459 else if ((in.s_addr & 0xffffff) == 0) 460 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 461 else if ((in.s_addr & 0xffff) == 0) 462 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 463 C(in.s_addr >> 16)); 464 else if ((in.s_addr & 0xff) == 0) 465 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 466 C(in.s_addr >> 16), C(in.s_addr >> 8)); 467 else 468 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 469 C(in.s_addr >> 16), C(in.s_addr >> 8), 470 C(in.s_addr)); 471 #undef C 472 break; 473 } 474 475 #ifdef INET6 476 case AF_INET6: 477 { 478 struct sockaddr_in6 sin6; /* use static var for safety */ 479 int niflags = 0; 480 481 memset(&sin6, 0, sizeof(sin6)); 482 memcpy(&sin6, sa, sa->sa_len); 483 sin6.sin6_len = sizeof(struct sockaddr_in6); 484 sin6.sin6_family = AF_INET6; 485 #ifdef __KAME__ 486 if (sa->sa_len == sizeof(struct sockaddr_in6) && 487 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 488 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 489 sin6.sin6_scope_id == 0) { 490 sin6.sin6_scope_id = 491 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 492 sin6.sin6_addr.s6_addr[2] = 0; 493 sin6.sin6_addr.s6_addr[3] = 0; 494 } 495 #endif 496 if (nflag) 497 niflags |= NI_NUMERICHOST; 498 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 499 line, sizeof(line), NULL, 0, niflags) != 0) 500 strncpy(line, "invalid", sizeof(line)); 501 502 return(line); 503 } 504 #endif 505 506 case AF_APPLETALK: 507 (void) snprintf(line, sizeof(line), "atalk %s", 508 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 509 break; 510 511 case AF_LINK: 512 return (link_ntoa((struct sockaddr_dl *)sa)); 513 514 515 default: 516 { u_short *s = (u_short *)sa->sa_data; 517 u_short *slim = s + ((sa->sa_len + 1)>>1); 518 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 519 char *cpe = line + sizeof(line); 520 521 while (s < slim && cp < cpe) 522 if ((n = snprintf(cp, cpe - cp, " %x", *s++)) > 0) 523 cp += n; 524 else 525 *cp = '\0'; 526 break; 527 } 528 } 529 return (line); 530 } 531 532 void 533 set_metric(value, key) 534 char *value; 535 int key; 536 { 537 int flag = 0; 538 u_long noval, *valp = &noval; 539 540 switch (key) { 541 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 542 caseof(K_MTU, RTV_MTU, rmx_mtu); 543 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 544 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 545 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 546 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 547 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 548 caseof(K_RTT, RTV_RTT, rmx_rtt); 549 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 550 } 551 rtm_inits |= flag; 552 if (lockrest || locking) 553 rt_metrics.rmx_locks |= flag; 554 if (locking) 555 locking = 0; 556 *valp = atoi(value); 557 } 558 559 void 560 newroute(argc, argv) 561 int argc; 562 char **argv; 563 { 564 char *cmd, *dest = "", *gateway = "", *err; 565 int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC; 566 int key; 567 struct hostent *hp = 0; 568 569 if (uid) { 570 errx(EX_NOPERM, "must be root to alter routing table"); 571 } 572 cmd = argv[0]; 573 if (*cmd != 'g') 574 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 575 while (--argc > 0) { 576 if (**(++argv)== '-') { 577 switch (key = keyword(1 + *argv)) { 578 case K_LINK: 579 af = AF_LINK; 580 aflen = sizeof(struct sockaddr_dl); 581 break; 582 case K_INET: 583 af = AF_INET; 584 aflen = sizeof(struct sockaddr_in); 585 break; 586 #ifdef INET6 587 case K_INET6: 588 af = AF_INET6; 589 aflen = sizeof(struct sockaddr_in6); 590 break; 591 #endif 592 case K_ATALK: 593 af = AF_APPLETALK; 594 aflen = sizeof(struct sockaddr_at); 595 break; 596 case K_SA: 597 af = PF_ROUTE; 598 aflen = sizeof(union sockunion); 599 break; 600 case K_IFACE: 601 case K_INTERFACE: 602 iflag++; 603 break; 604 case K_NOSTATIC: 605 flags &= ~RTF_STATIC; 606 break; 607 case K_LLINFO: 608 flags |= RTF_LLINFO; 609 break; 610 case K_LOCK: 611 locking = 1; 612 break; 613 case K_LOCKREST: 614 lockrest = 1; 615 break; 616 case K_HOST: 617 forcehost++; 618 break; 619 case K_REJECT: 620 flags |= RTF_REJECT; 621 break; 622 case K_BLACKHOLE: 623 flags |= RTF_BLACKHOLE; 624 break; 625 case K_PROTO1: 626 flags |= RTF_PROTO1; 627 break; 628 case K_PROTO2: 629 flags |= RTF_PROTO2; 630 break; 631 case K_PROXY: 632 proxy = 1; 633 break; 634 case K_CLONING: 635 flags |= RTF_CLONING; 636 break; 637 case K_XRESOLVE: 638 flags |= RTF_XRESOLVE; 639 break; 640 case K_STATIC: 641 flags |= RTF_STATIC; 642 break; 643 case K_IFA: 644 if (!--argc) 645 usage((char *)NULL); 646 (void) getaddr(RTA_IFA, *++argv, 0); 647 break; 648 case K_IFP: 649 if (!--argc) 650 usage((char *)NULL); 651 (void) getaddr(RTA_IFP, *++argv, 0); 652 break; 653 case K_GENMASK: 654 if (!--argc) 655 usage((char *)NULL); 656 (void) getaddr(RTA_GENMASK, *++argv, 0); 657 break; 658 case K_GATEWAY: 659 if (!--argc) 660 usage((char *)NULL); 661 (void) getaddr(RTA_GATEWAY, *++argv, 0); 662 break; 663 case K_DST: 664 if (!--argc) 665 usage((char *)NULL); 666 ishost = getaddr(RTA_DST, *++argv, &hp); 667 dest = *argv; 668 break; 669 case K_NETMASK: 670 if (!--argc) 671 usage((char *)NULL); 672 (void) getaddr(RTA_NETMASK, *++argv, 0); 673 /* FALLTHROUGH */ 674 case K_NET: 675 forcenet++; 676 break; 677 case K_PREFIXLEN: 678 if (!--argc) 679 usage((char *)NULL); 680 if (prefixlen(*++argv) == -1) { 681 forcenet = 0; 682 ishost = 1; 683 } else { 684 forcenet = 1; 685 ishost = 0; 686 } 687 break; 688 case K_MTU: 689 case K_HOPCOUNT: 690 case K_EXPIRE: 691 case K_RECVPIPE: 692 case K_SENDPIPE: 693 case K_SSTHRESH: 694 case K_RTT: 695 case K_RTTVAR: 696 if (!--argc) 697 usage((char *)NULL); 698 set_metric(*++argv, key); 699 break; 700 default: 701 usage(1+*argv); 702 } 703 } else { 704 if ((rtm_addrs & RTA_DST) == 0) { 705 dest = *argv; 706 ishost = getaddr(RTA_DST, *argv, &hp); 707 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 708 gateway = *argv; 709 (void) getaddr(RTA_GATEWAY, *argv, &hp); 710 } else { 711 (void) getaddr(RTA_NETMASK, *argv, 0); 712 forcenet = 1; 713 } 714 } 715 } 716 if (forcehost) { 717 ishost = 1; 718 #ifdef INET6 719 if (af == AF_INET6) { 720 rtm_addrs &= ~RTA_NETMASK; 721 memset((void *)&so_mask, 0, sizeof(so_mask)); 722 } 723 #endif 724 } 725 if (forcenet) 726 ishost = 0; 727 flags |= RTF_UP; 728 if (ishost) 729 flags |= RTF_HOST; 730 if (iflag == 0) 731 flags |= RTF_GATEWAY; 732 if (proxy) { 733 so_dst.sinarp.sin_other = SIN_PROXY; 734 flags |= RTF_ANNOUNCE; 735 } 736 for (attempts = 1; ; attempts++) { 737 errno = 0; 738 if ((ret = rtmsg(*cmd, flags)) == 0) 739 break; 740 if (errno != ENETUNREACH && errno != ESRCH) 741 break; 742 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 743 hp->h_addr_list++; 744 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 745 MIN(hp->h_length, sizeof(so_gate.sin.sin_addr))); 746 } else 747 break; 748 } 749 if (*cmd == 'g') 750 exit(0); 751 if (!qflag) { 752 oerrno = errno; 753 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 754 if (*gateway) { 755 (void) printf(": gateway %s", gateway); 756 if (attempts > 1 && ret == 0 && af == AF_INET) 757 (void) printf(" (%s)", 758 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 759 } 760 if (ret == 0) { 761 (void) printf("\n"); 762 } else { 763 switch (oerrno) { 764 case ESRCH: 765 err = "not in table"; 766 break; 767 case EBUSY: 768 err = "entry in use"; 769 break; 770 case ENOBUFS: 771 err = "not enough memory"; 772 break; 773 case EADDRINUSE: 774 /* handle recursion avoidance in rt_setgate() */ 775 err = "gateway uses the same route"; 776 break; 777 case EEXIST: 778 err = "route already in table"; 779 break; 780 default: 781 err = strerror(oerrno); 782 break; 783 } 784 (void) printf(": %s\n", err); 785 } 786 } 787 exit(ret != 0); 788 } 789 790 void 791 inet_makenetandmask(net, sin, bits) 792 u_long net, bits; 793 struct sockaddr_in *sin; 794 { 795 u_long addr, mask = 0; 796 char *cp; 797 798 rtm_addrs |= RTA_NETMASK; 799 if (net == 0) 800 mask = addr = 0; 801 else if (net < 128) { 802 addr = net << IN_CLASSA_NSHIFT; 803 mask = IN_CLASSA_NET; 804 } else if (net < 65536) { 805 addr = net << IN_CLASSB_NSHIFT; 806 mask = IN_CLASSB_NET; 807 } else if (net < 16777216L) { 808 addr = net << IN_CLASSC_NSHIFT; 809 mask = IN_CLASSC_NET; 810 } else { 811 addr = net; 812 if ((addr & IN_CLASSA_HOST) == 0) 813 mask = IN_CLASSA_NET; 814 else if ((addr & IN_CLASSB_HOST) == 0) 815 mask = IN_CLASSB_NET; 816 else if ((addr & IN_CLASSC_HOST) == 0) 817 mask = IN_CLASSC_NET; 818 else 819 mask = -1; 820 } 821 if (bits) 822 mask = 0xffffffff << (32 - bits); 823 sin->sin_addr.s_addr = htonl(addr); 824 sin = &so_mask.sin; 825 sin->sin_addr.s_addr = htonl(mask); 826 sin->sin_len = 0; 827 sin->sin_family = 0; 828 cp = (char *)(&sin->sin_addr + 1); 829 while (*--cp == 0 && cp > (char *)sin) 830 ; 831 sin->sin_len = 1 + cp - (char *)sin; 832 } 833 834 #ifdef INET6 835 /* 836 * XXX the function may need more improvement... 837 */ 838 static int 839 inet6_makenetandmask(sin6, plen) 840 struct sockaddr_in6 *sin6; 841 char *plen; 842 { 843 struct in6_addr in6; 844 845 if (!plen) { 846 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 847 sin6->sin6_scope_id == 0) { 848 plen = "0"; 849 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 850 /* aggregatable global unicast - RFC2374 */ 851 memset(&in6, 0, sizeof(in6)); 852 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 853 &in6.s6_addr[8], 8)) 854 plen = "64"; 855 } 856 } 857 858 if (!plen || strcmp(plen, "128") == 0) 859 return 1; 860 rtm_addrs |= RTA_NETMASK; 861 (void)prefixlen(plen); 862 return 0; 863 } 864 #endif 865 866 /* 867 * Interpret an argument as a network address of some kind, 868 * returning 1 if a host address, 0 if a network address. 869 */ 870 int 871 getaddr(which, s, hpp) 872 int which; 873 char *s; 874 struct hostent **hpp; 875 { 876 sup su; 877 struct hostent *hp; 878 struct netent *np; 879 u_long val; 880 char *q; 881 int afamily; /* local copy of af so we can change it */ 882 883 if (af == 0) { 884 af = AF_INET; 885 aflen = sizeof(struct sockaddr_in); 886 } 887 afamily = af; 888 rtm_addrs |= which; 889 switch (which) { 890 case RTA_DST: 891 su = &so_dst; 892 break; 893 case RTA_GATEWAY: 894 su = &so_gate; 895 if (iflag) { 896 struct ifaddrs *ifap, *ifa; 897 struct sockaddr_dl *sdl = NULL; 898 899 if (getifaddrs(&ifap)) 900 err(1, "getifaddrs"); 901 902 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 903 if (ifa->ifa_addr->sa_family != AF_LINK) 904 continue; 905 906 if (strcmp(s, ifa->ifa_name)) 907 continue; 908 909 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 910 } 911 /* If we found it, then use it */ 912 if (sdl) { 913 /* 914 * Copy is safe since we have a 915 * sockaddr_storage member in sockunion{}. 916 * Note that we need to copy before calling 917 * freeifaddrs(). 918 */ 919 memcpy(&su->sdl, sdl, sdl->sdl_len); 920 } 921 freeifaddrs(ifap); 922 if (sdl) 923 return(1); 924 } 925 break; 926 case RTA_NETMASK: 927 su = &so_mask; 928 break; 929 case RTA_GENMASK: 930 su = &so_genmask; 931 break; 932 case RTA_IFP: 933 su = &so_ifp; 934 afamily = AF_LINK; 935 break; 936 case RTA_IFA: 937 su = &so_ifa; 938 break; 939 default: 940 usage("internal error"); 941 /*NOTREACHED*/ 942 } 943 su->sa.sa_len = aflen; 944 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 945 if (strcmp(s, "default") == 0) { 946 /* 947 * Default is net 0.0.0.0/0 948 */ 949 switch (which) { 950 case RTA_DST: 951 forcenet++; 952 #if 0 953 bzero(su, sizeof(*su)); /* for readability */ 954 #endif 955 (void) getaddr(RTA_NETMASK, s, 0); 956 break; 957 #if 0 958 case RTA_NETMASK: 959 case RTA_GENMASK: 960 bzero(su, sizeof(*su)); /* for readability */ 961 #endif 962 } 963 return (0); 964 } 965 switch (afamily) { 966 #ifdef INET6 967 case AF_INET6: 968 { 969 struct addrinfo hints, *res; 970 int ecode; 971 972 q = NULL; 973 if (which == RTA_DST && (q = strchr(s, '/')) != NULL) 974 *q = '\0'; 975 memset(&hints, 0, sizeof(hints)); 976 hints.ai_family = afamily; /*AF_INET6*/ 977 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 978 ecode = getaddrinfo(s, NULL, &hints, &res); 979 if (ecode != 0 || res->ai_family != AF_INET6 || 980 res->ai_addrlen != sizeof(su->sin6)) { 981 (void) fprintf(stderr, "%s: %s\n", s, 982 gai_strerror(ecode)); 983 exit(1); 984 } 985 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 986 #ifdef __KAME__ 987 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 988 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 989 su->sin6.sin6_scope_id) { 990 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 991 htons(su->sin6.sin6_scope_id); 992 su->sin6.sin6_scope_id = 0; 993 } 994 #endif 995 freeaddrinfo(res); 996 if (q != NULL) 997 *q++ = '/'; 998 if (which == RTA_DST) 999 return (inet6_makenetandmask(&su->sin6, q)); 1000 return (0); 1001 } 1002 #endif /* INET6 */ 1003 1004 case AF_APPLETALK: 1005 if (!atalk_aton(s, &su->sat.sat_addr)) 1006 errx(EX_NOHOST, "bad address: %s", s); 1007 rtm_addrs |= RTA_NETMASK; 1008 return(forcehost || su->sat.sat_addr.s_node != 0); 1009 1010 case AF_LINK: 1011 link_addr(s, &su->sdl); 1012 return (1); 1013 1014 1015 case PF_ROUTE: 1016 su->sa.sa_len = sizeof(*su); 1017 sockaddr(s, &su->sa); 1018 return (1); 1019 1020 case AF_INET: 1021 default: 1022 break; 1023 } 1024 1025 if (hpp == NULL) 1026 hpp = &hp; 1027 *hpp = NULL; 1028 1029 q = strchr(s,'/'); 1030 if (q && which == RTA_DST) { 1031 *q = '\0'; 1032 if ((val = inet_network(s)) != INADDR_NONE) { 1033 inet_makenetandmask( 1034 val, &su->sin, strtoul(q+1, 0, 0)); 1035 return (0); 1036 } 1037 *q = '/'; 1038 } 1039 if ((which != RTA_DST || forcenet == 0) && 1040 inet_aton(s, &su->sin.sin_addr)) { 1041 val = su->sin.sin_addr.s_addr; 1042 if (which != RTA_DST || forcehost || 1043 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1044 return (1); 1045 else { 1046 val = ntohl(val); 1047 goto netdone; 1048 } 1049 } 1050 if (which == RTA_DST && forcehost == 0 && 1051 ((val = inet_network(s)) != INADDR_NONE || 1052 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) { 1053 netdone: 1054 inet_makenetandmask(val, &su->sin, 0); 1055 return (0); 1056 } 1057 hp = gethostbyname(s); 1058 if (hp) { 1059 *hpp = hp; 1060 su->sin.sin_family = hp->h_addrtype; 1061 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1062 MIN(hp->h_length, sizeof(su->sin.sin_addr))); 1063 return (1); 1064 } 1065 errx(EX_NOHOST, "bad address: %s", s); 1066 } 1067 1068 int 1069 prefixlen(s) 1070 char *s; 1071 { 1072 int len = atoi(s), q, r; 1073 int max; 1074 char *p; 1075 1076 rtm_addrs |= RTA_NETMASK; 1077 switch (af) { 1078 #ifdef INET6 1079 case AF_INET6: 1080 max = 128; 1081 p = (char *)&so_mask.sin6.sin6_addr; 1082 break; 1083 #endif 1084 case AF_INET: 1085 max = 32; 1086 p = (char *)&so_mask.sin.sin_addr; 1087 break; 1088 default: 1089 (void) fprintf(stderr, "prefixlen not supported in this af\n"); 1090 exit(1); 1091 /*NOTREACHED*/ 1092 } 1093 1094 if (len < 0 || max < len) { 1095 (void) fprintf(stderr, "%s: bad value\n", s); 1096 exit(1); 1097 } 1098 1099 q = len >> 3; 1100 r = len & 7; 1101 so_mask.sa.sa_family = af; 1102 so_mask.sa.sa_len = aflen; 1103 memset((void *)p, 0, max / 8); 1104 if (q > 0) 1105 memset((void *)p, 0xff, q); 1106 if (r > 0) 1107 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1108 if (len == max) 1109 return -1; 1110 else 1111 return len; 1112 } 1113 1114 void 1115 interfaces() 1116 { 1117 size_t needed; 1118 int mib[6]; 1119 char *buf, *lim, *next, count = 0; 1120 struct rt_msghdr *rtm; 1121 1122 retry2: 1123 mib[0] = CTL_NET; 1124 mib[1] = PF_ROUTE; 1125 mib[2] = 0; /* protocol */ 1126 mib[3] = 0; /* wildcard address family */ 1127 mib[4] = NET_RT_IFLIST; 1128 mib[5] = 0; /* no flags */ 1129 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1130 err(EX_OSERR, "route-sysctl-estimate"); 1131 if ((buf = malloc(needed)) == NULL) 1132 errx(EX_OSERR, "malloc failed"); 1133 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 1134 if (errno == ENOMEM && count++ < 10) { 1135 warnx("Routing table grew, retrying"); 1136 sleep(1); 1137 free(buf); 1138 goto retry2; 1139 } 1140 err(EX_OSERR, "actual retrieval of interface table"); 1141 } 1142 lim = buf + needed; 1143 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1144 rtm = (struct rt_msghdr *)next; 1145 print_rtmsg(rtm, rtm->rtm_msglen); 1146 } 1147 } 1148 1149 void 1150 monitor() 1151 { 1152 int n; 1153 char msg[2048]; 1154 1155 verbose = 1; 1156 if (debugonly) { 1157 interfaces(); 1158 exit(0); 1159 } 1160 for(;;) { 1161 time_t now; 1162 n = read(s, msg, 2048); 1163 now = time(NULL); 1164 (void) printf("\ngot message of size %d on %s", n, ctime(&now)); 1165 print_rtmsg((struct rt_msghdr *)msg, n); 1166 } 1167 } 1168 1169 struct { 1170 struct rt_msghdr m_rtm; 1171 char m_space[512]; 1172 } m_rtmsg; 1173 1174 int 1175 rtmsg(cmd, flags) 1176 int cmd, flags; 1177 { 1178 static int seq; 1179 int rlen; 1180 char *cp = m_rtmsg.m_space; 1181 int l; 1182 1183 #define NEXTADDR(w, u) \ 1184 if (rtm_addrs & (w)) {\ 1185 l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\ 1186 if (verbose) sodump(&(u),"u");\ 1187 } 1188 1189 errno = 0; 1190 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1191 if (cmd == 'a') 1192 cmd = RTM_ADD; 1193 else if (cmd == 'c') 1194 cmd = RTM_CHANGE; 1195 else if (cmd == 'g') { 1196 cmd = RTM_GET; 1197 if (so_ifp.sa.sa_family == 0) { 1198 so_ifp.sa.sa_family = AF_LINK; 1199 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1200 rtm_addrs |= RTA_IFP; 1201 } 1202 } else 1203 cmd = RTM_DELETE; 1204 #define rtm m_rtmsg.m_rtm 1205 rtm.rtm_type = cmd; 1206 rtm.rtm_flags = flags; 1207 rtm.rtm_version = RTM_VERSION; 1208 rtm.rtm_seq = ++seq; 1209 rtm.rtm_addrs = rtm_addrs; 1210 rtm.rtm_rmx = rt_metrics; 1211 rtm.rtm_inits = rtm_inits; 1212 1213 if (rtm_addrs & RTA_NETMASK) 1214 mask_addr(); 1215 NEXTADDR(RTA_DST, so_dst); 1216 NEXTADDR(RTA_GATEWAY, so_gate); 1217 NEXTADDR(RTA_NETMASK, so_mask); 1218 NEXTADDR(RTA_GENMASK, so_genmask); 1219 NEXTADDR(RTA_IFP, so_ifp); 1220 NEXTADDR(RTA_IFA, so_ifa); 1221 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1222 if (verbose) 1223 print_rtmsg(&rtm, l); 1224 if (debugonly) 1225 return (0); 1226 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1227 if (errno == EPERM) 1228 err(1, "writing to routing socket"); 1229 warn("writing to routing socket"); 1230 return (-1); 1231 } 1232 if (cmd == RTM_GET) { 1233 do { 1234 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1235 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1236 if (l < 0) 1237 warn("read from routing socket"); 1238 else 1239 print_getmsg(&rtm, l); 1240 } 1241 #undef rtm 1242 return (0); 1243 } 1244 1245 void 1246 mask_addr() 1247 { 1248 int olen = so_mask.sa.sa_len; 1249 char *cp1 = olen + (char *)&so_mask, *cp2; 1250 1251 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1252 if (*--cp1 != 0) { 1253 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1254 break; 1255 } 1256 if ((rtm_addrs & RTA_DST) == 0) 1257 return; 1258 switch (so_dst.sa.sa_family) { 1259 case AF_INET: 1260 #ifdef INET6 1261 case AF_INET6: 1262 #endif 1263 case AF_APPLETALK: 1264 case 0: 1265 return; 1266 } 1267 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1268 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1269 while (cp2 > cp1) 1270 *--cp2 = 0; 1271 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1272 while (cp1 > so_dst.sa.sa_data) 1273 *--cp1 &= *--cp2; 1274 } 1275 1276 char *msgtypes[] = { 1277 "", 1278 "RTM_ADD: Add Route", 1279 "RTM_DELETE: Delete Route", 1280 "RTM_CHANGE: Change Metrics or flags", 1281 "RTM_GET: Report Metrics", 1282 "RTM_LOSING: Kernel Suspects Partitioning", 1283 "RTM_REDIRECT: Told to use different route", 1284 "RTM_MISS: Lookup failed on this address", 1285 "RTM_LOCK: fix specified metrics", 1286 "RTM_OLDADD: caused by SIOCADDRT", 1287 "RTM_OLDDEL: caused by SIOCDELRT", 1288 "RTM_RESOLVE: Route created by cloning", 1289 "RTM_NEWADDR: address being added to iface", 1290 "RTM_DELADDR: address being removed from iface", 1291 "RTM_IFINFO: iface status change", 1292 "RTM_NEWMADDR: new multicast group membership on iface", 1293 "RTM_DELMADDR: multicast group membership removed from iface", 1294 "RTM_IFANNOUNCE: interface arrival/departure", 1295 0, 1296 }; 1297 1298 char metricnames[] = 1299 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount" 1300 "\1mtu"; 1301 char routeflags[] = 1302 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT" 1303 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016" 1304 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE" 1305 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST"; 1306 char ifnetflags[] = 1307 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1308 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1309 "\017LINK2\020MULTICAST"; 1310 char addrnames[] = 1311 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1312 1313 void 1314 print_rtmsg(rtm, msglen) 1315 struct rt_msghdr *rtm; 1316 int msglen; 1317 { 1318 struct if_msghdr *ifm; 1319 struct ifa_msghdr *ifam; 1320 #ifdef RTM_NEWMADDR 1321 struct ifma_msghdr *ifmam; 1322 #endif 1323 struct if_announcemsghdr *ifan; 1324 char *state; 1325 1326 if (verbose == 0) 1327 return; 1328 if (rtm->rtm_version != RTM_VERSION) { 1329 (void) printf("routing message version %d not understood\n", 1330 rtm->rtm_version); 1331 return; 1332 } 1333 if (msgtypes[rtm->rtm_type] != NULL) 1334 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1335 else 1336 (void)printf("#%d: ", rtm->rtm_type); 1337 (void)printf("len %d, ", rtm->rtm_msglen); 1338 switch (rtm->rtm_type) { 1339 case RTM_IFINFO: 1340 ifm = (struct if_msghdr *)rtm; 1341 (void) printf("if# %d, ", ifm->ifm_index); 1342 switch (ifm->ifm_data.ifi_link_state) { 1343 case LINK_STATE_DOWN: 1344 state = "down"; 1345 break; 1346 case LINK_STATE_UP: 1347 state = "up"; 1348 break; 1349 default: 1350 state = "unknown"; 1351 break; 1352 } 1353 (void) printf("link: %s, flags:", state); 1354 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1355 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1356 break; 1357 case RTM_NEWADDR: 1358 case RTM_DELADDR: 1359 ifam = (struct ifa_msghdr *)rtm; 1360 (void) printf("metric %d, flags:", ifam->ifam_metric); 1361 bprintf(stdout, ifam->ifam_flags, routeflags); 1362 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1363 break; 1364 #ifdef RTM_NEWMADDR 1365 case RTM_NEWMADDR: 1366 case RTM_DELMADDR: 1367 ifmam = (struct ifma_msghdr *)rtm; 1368 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs); 1369 break; 1370 #endif 1371 case RTM_IFANNOUNCE: 1372 ifan = (struct if_announcemsghdr *)rtm; 1373 (void) printf("if# %d, what: ", ifan->ifan_index); 1374 switch (ifan->ifan_what) { 1375 case IFAN_ARRIVAL: 1376 printf("arrival"); 1377 break; 1378 case IFAN_DEPARTURE: 1379 printf("departure"); 1380 break; 1381 default: 1382 printf("#%d", ifan->ifan_what); 1383 break; 1384 } 1385 printf("\n"); 1386 break; 1387 1388 default: 1389 (void) printf("pid: %ld, seq %d, errno %d, flags:", 1390 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1391 bprintf(stdout, rtm->rtm_flags, routeflags); 1392 pmsg_common(rtm); 1393 } 1394 } 1395 1396 void 1397 print_getmsg(rtm, msglen) 1398 struct rt_msghdr *rtm; 1399 int msglen; 1400 { 1401 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1402 struct sockaddr_dl *ifp = NULL; 1403 struct sockaddr *sa; 1404 char *cp; 1405 int i; 1406 1407 (void) printf(" route to: %s\n", routename(&so_dst)); 1408 if (rtm->rtm_version != RTM_VERSION) { 1409 warnx("routing message version %d not understood", 1410 rtm->rtm_version); 1411 return; 1412 } 1413 if (rtm->rtm_msglen > msglen) { 1414 warnx("message length mismatch, in packet %d, returned %d", 1415 rtm->rtm_msglen, msglen); 1416 } 1417 if (rtm->rtm_errno) { 1418 errno = rtm->rtm_errno; 1419 warn("message indicates error %d", errno); 1420 return; 1421 } 1422 cp = ((char *)(rtm + 1)); 1423 if (rtm->rtm_addrs) 1424 for (i = 1; i; i <<= 1) 1425 if (i & rtm->rtm_addrs) { 1426 sa = (struct sockaddr *)cp; 1427 switch (i) { 1428 case RTA_DST: 1429 dst = sa; 1430 break; 1431 case RTA_GATEWAY: 1432 gate = sa; 1433 break; 1434 case RTA_NETMASK: 1435 mask = sa; 1436 break; 1437 case RTA_IFP: 1438 if (sa->sa_family == AF_LINK && 1439 ((struct sockaddr_dl *)sa)->sdl_nlen) 1440 ifp = (struct sockaddr_dl *)sa; 1441 break; 1442 } 1443 cp += SA_SIZE(sa); 1444 } 1445 if (dst && mask) 1446 mask->sa_family = dst->sa_family; /* XXX */ 1447 if (dst) 1448 (void)printf("destination: %s\n", routename(dst)); 1449 if (mask) { 1450 int savenflag = nflag; 1451 1452 nflag = 1; 1453 (void)printf(" mask: %s\n", routename(mask)); 1454 nflag = savenflag; 1455 } 1456 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1457 (void)printf(" gateway: %s\n", routename(gate)); 1458 if (ifp) 1459 (void)printf(" interface: %.*s\n", 1460 ifp->sdl_nlen, ifp->sdl_data); 1461 (void)printf(" flags: "); 1462 bprintf(stdout, rtm->rtm_flags, routeflags); 1463 1464 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1465 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1466 1467 (void) printf("\n%s\n", "\ 1468 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1469 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1470 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1471 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1472 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1473 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1474 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1475 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1476 if (rtm->rtm_rmx.rmx_expire) 1477 rtm->rtm_rmx.rmx_expire -= time(0); 1478 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1479 #undef lock 1480 #undef msec 1481 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1482 if (verbose) 1483 pmsg_common(rtm); 1484 else if (rtm->rtm_addrs &~ RTA_IGN) { 1485 (void) printf("sockaddrs: "); 1486 bprintf(stdout, rtm->rtm_addrs, addrnames); 1487 putchar('\n'); 1488 } 1489 #undef RTA_IGN 1490 } 1491 1492 void 1493 pmsg_common(rtm) 1494 struct rt_msghdr *rtm; 1495 { 1496 (void) printf("\nlocks: "); 1497 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1498 (void) printf(" inits: "); 1499 bprintf(stdout, rtm->rtm_inits, metricnames); 1500 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1501 } 1502 1503 void 1504 pmsg_addrs(cp, addrs) 1505 char *cp; 1506 int addrs; 1507 { 1508 struct sockaddr *sa; 1509 int i; 1510 1511 if (addrs == 0) { 1512 (void) putchar('\n'); 1513 return; 1514 } 1515 (void) printf("\nsockaddrs: "); 1516 bprintf(stdout, addrs, addrnames); 1517 (void) putchar('\n'); 1518 for (i = 1; i; i <<= 1) 1519 if (i & addrs) { 1520 sa = (struct sockaddr *)cp; 1521 (void) printf(" %s", routename(sa)); 1522 cp += SA_SIZE(sa); 1523 } 1524 (void) putchar('\n'); 1525 (void) fflush(stdout); 1526 } 1527 1528 void 1529 bprintf(fp, b, s) 1530 FILE *fp; 1531 int b; 1532 u_char *s; 1533 { 1534 int i; 1535 int gotsome = 0; 1536 1537 if (b == 0) 1538 return; 1539 while ((i = *s++) != 0) { 1540 if (b & (1 << (i-1))) { 1541 if (gotsome == 0) 1542 i = '<'; 1543 else 1544 i = ','; 1545 (void) putc(i, fp); 1546 gotsome = 1; 1547 for (; (i = *s) > 32; s++) 1548 (void) putc(i, fp); 1549 } else 1550 while (*s > 32) 1551 s++; 1552 } 1553 if (gotsome) 1554 (void) putc('>', fp); 1555 } 1556 1557 int 1558 keyword(cp) 1559 char *cp; 1560 { 1561 struct keytab *kt = keywords; 1562 1563 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1564 kt++; 1565 return kt->kt_i; 1566 } 1567 1568 void 1569 sodump(su, which) 1570 sup su; 1571 char *which; 1572 { 1573 switch (su->sa.sa_family) { 1574 case AF_LINK: 1575 (void) printf("%s: link %s; ", 1576 which, link_ntoa(&su->sdl)); 1577 break; 1578 case AF_INET: 1579 (void) printf("%s: inet %s; ", 1580 which, inet_ntoa(su->sin.sin_addr)); 1581 break; 1582 case AF_APPLETALK: 1583 (void) printf("%s: atalk %s; ", 1584 which, atalk_ntoa(su->sat.sat_addr)); 1585 break; 1586 } 1587 (void) fflush(stdout); 1588 } 1589 1590 /* States*/ 1591 #define VIRGIN 0 1592 #define GOTONE 1 1593 #define GOTTWO 2 1594 /* Inputs */ 1595 #define DIGIT (4*0) 1596 #define END (4*1) 1597 #define DELIM (4*2) 1598 1599 void 1600 sockaddr(addr, sa) 1601 char *addr; 1602 struct sockaddr *sa; 1603 { 1604 char *cp = (char *)sa; 1605 int size = sa->sa_len; 1606 char *cplim = cp + size; 1607 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1608 1609 memset(cp, 0, size); 1610 cp++; 1611 do { 1612 if ((*addr >= '0') && (*addr <= '9')) { 1613 new = *addr - '0'; 1614 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1615 new = *addr - 'a' + 10; 1616 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1617 new = *addr - 'A' + 10; 1618 } else if (*addr == 0) 1619 state |= END; 1620 else 1621 state |= DELIM; 1622 addr++; 1623 switch (state /* | INPUT */) { 1624 case GOTTWO | DIGIT: 1625 *cp++ = byte; /*FALLTHROUGH*/ 1626 case VIRGIN | DIGIT: 1627 state = GOTONE; byte = new; continue; 1628 case GOTONE | DIGIT: 1629 state = GOTTWO; byte = new + (byte << 4); continue; 1630 default: /* | DELIM */ 1631 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1632 case GOTONE | END: 1633 case GOTTWO | END: 1634 *cp++ = byte; /* FALLTHROUGH */ 1635 case VIRGIN | END: 1636 break; 1637 } 1638 break; 1639 } while (cp < cplim); 1640 sa->sa_len = cp - (char *)sa; 1641 } 1642 1643 int 1644 atalk_aton(const char *text, struct at_addr *addr) 1645 { 1646 u_int net, node; 1647 1648 if (sscanf(text, "%u.%u", &net, &node) != 2 1649 || net > 0xffff || node > 0xff) 1650 return(0); 1651 addr->s_net = htons(net); 1652 addr->s_node = node; 1653 return(1); 1654 } 1655 1656 char * 1657 atalk_ntoa(struct at_addr at) 1658 { 1659 static char buf[20]; 1660 1661 (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1662 return(buf); 1663 } 1664