route.c revision 1.1
1 /* 2 * Copyright (c) 1983, 1989 The Regents of the University of California. 3 * 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 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)route.c 5.35 (Berkeley) 6/27/91"; 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/mbuf.h> 49 #include <sys/kinfo.h> 50 51 #include <net/route.h> 52 #include <net/if_dl.h> 53 #include <netinet/in.h> 54 #ifdef notyet 55 #include <netns/ns.h> 56 #include <netiso/iso.h> 57 #include <netccitt/x25.h> 58 #endif 59 #include <arpa/inet.h> 60 #include <netdb.h> 61 62 #include <errno.h> 63 #include <unistd.h> 64 #include <stdio.h> 65 #include <ctype.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <paths.h> 69 70 struct keytab { 71 char *kt_cp; 72 int kt_i; 73 } keywords[] = { 74 #include "keywords.h" 75 {0, 0} 76 }; 77 78 struct ortentry route; 79 union sockunion { 80 struct sockaddr sa; 81 struct sockaddr_in sin; 82 #ifdef notdef 83 struct sockaddr_ns sns; 84 struct sockaddr_iso siso; 85 #endif 86 struct sockaddr_dl sdl; 87 #ifdef notdef 88 struct sockaddr_x25 sx25; 89 #endif 90 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 91 92 union sockunion *so_addrs[] = 93 { &so_dst, &so_gate, &so_mask, &so_genmask, &so_ifp, &so_ifa, 0}; 94 95 typedef union sockunion *sup; 96 int pid, rtm_addrs, uid; 97 int s; 98 int forcehost, forcenet, doflush, nflag, af, qflag, tflag, Cflag, keyword(); 99 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 100 int locking, lockrest, debugonly; 101 struct sockaddr_in sin = { sizeof(sin), AF_INET }; 102 struct rt_metrics rt_metrics; 103 u_long rtm_inits; 104 struct in_addr inet_makeaddr(); 105 char *routename(), *netname(); 106 void flushroutes(), newroute(), monitor(), sockaddr(); 107 void print_getmsg(), print_rtmsg(), pmsg_common(), sodump(), bprintf(); 108 int getaddr(), rtmsg(); 109 extern char *inet_ntoa(), 110 #ifdef notdef 111 *iso_ntoa(), 112 #endif 113 *link_ntoa(); 114 115 void 116 usage(cp) 117 char *cp; 118 { 119 if (cp) 120 (void) fprintf(stderr, "route: botched keyword: %s\n", cp); 121 (void) fprintf(stderr, 122 "usage: route [ -Cnqv ] cmd [[ -<qualifers> ] args ]\n"); 123 exit(1); 124 /* NOTREACHED */ 125 } 126 127 void 128 quit(s) 129 char *s; 130 { 131 int sverrno = errno; 132 133 (void) fprintf(stderr, "route: "); 134 if (s) 135 (void) fprintf(stderr, "%s: ", s); 136 (void) fprintf(stderr, "%s\n", strerror(sverrno)); 137 exit(1); 138 /* NOTREACHED */ 139 } 140 141 #define ROUNDUP(a) \ 142 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 143 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 144 145 main(argc, argv) 146 int argc; 147 char **argv; 148 { 149 extern int optind; 150 int ch; 151 char *argvp; 152 153 if (argc < 2) 154 usage((char *)NULL); 155 156 while ((ch = getopt(argc, argv, "Cnqtv")) != EOF) 157 switch(ch) { 158 case 'C': 159 Cflag = 1; /* Use old ioctls. */ 160 break; 161 case 'n': 162 nflag = 1; 163 break; 164 case 'q': 165 qflag = 1; 166 break; 167 case 'v': 168 verbose = 1; 169 break; 170 case 't': 171 tflag = 1; 172 break; 173 case '?': 174 default: 175 usage(); 176 } 177 argc -= optind; 178 argv += optind; 179 180 pid = getpid(); 181 uid = getuid(); 182 if (tflag) 183 s = open("/dev/null", O_WRONLY, 0); 184 else if (Cflag) 185 s = socket(AF_INET, SOCK_RAW, 0); 186 else 187 s = socket(PF_ROUTE, SOCK_RAW, 0); 188 if (s < 0) 189 quit("socket"); 190 if (*argv) 191 switch (keyword(*argv)) { 192 case K_GET: 193 uid = 0; 194 /* FALLTHROUGH */ 195 196 case K_CHANGE: 197 if (Cflag) 198 usage("change or get with -C"); 199 /* FALLTHROUGH */ 200 201 case K_ADD: 202 case K_DELETE: 203 newroute(argc, argv); 204 exit(0); 205 /* NOTREACHED */ 206 207 case K_MONITOR: 208 monitor(); 209 /* NOTREACHED */ 210 211 case K_FLUSH: 212 flushroutes(argc, argv); 213 exit(0); 214 /* NOTREACHED */ 215 } 216 usage(*argv); 217 /* NOTREACHED */ 218 } 219 220 /* 221 * Purge all entries in the routing tables not 222 * associated with network interfaces. 223 */ 224 void 225 flushroutes(argc, argv) 226 int argc; 227 char *argv[]; 228 { 229 int needed, seqno, rlen; 230 char *buf, *next, *lim; 231 register struct rt_msghdr *rtm; 232 233 if (uid) 234 quit("must be root to alter routing table"); 235 shutdown(s, 0); /* Don't want to read back our messages */ 236 if (argc > 1) { 237 argv++; 238 if (argc == 2 && **argv == '-') 239 switch (keyword(*argv + 1)) { 240 case K_INET: 241 af = AF_INET; 242 break; 243 case K_XNS: 244 af = AF_NS; 245 break; 246 case K_LINK: 247 af = AF_LINK; 248 break; 249 case K_ISO: 250 case K_OSI: 251 af = AF_ISO; 252 break; 253 case K_X25: 254 af = AF_CCITT; 255 default: 256 goto bad; 257 } else 258 bad: usage(*argv); 259 } 260 if ((needed = getkerninfo(KINFO_RT_DUMP, 0, 0, 0)) < 0) 261 quit("route-getkerninfo-estimate"); 262 if ((buf = malloc(needed)) == NULL) 263 quit("malloc"); 264 if ((rlen = getkerninfo(KINFO_RT_DUMP, buf, &needed, 0)) < 0) 265 quit("actual retrieval of routing table"); 266 lim = buf + rlen; 267 seqno = 0; /* ??? */ 268 for (next = buf; next < lim; next += rtm->rtm_msglen) { 269 rtm = (struct rt_msghdr *)next; 270 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 271 continue; 272 if (af) { 273 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 274 275 if (sa->sa_family != af) 276 continue; 277 } 278 rtm->rtm_type = RTM_DELETE; 279 rtm->rtm_seq = seqno; 280 rlen = write(s, next, rtm->rtm_msglen); 281 if (rlen < (int)rtm->rtm_msglen) { 282 (void) fprintf(stderr, 283 "route: write to routing socket: %s\n", 284 strerror(errno)); 285 (void) printf("got only %d for rlen\n", rlen); 286 break; 287 } 288 seqno++; 289 if (qflag) 290 continue; 291 if (verbose) 292 print_rtmsg(rtm, rlen); 293 else { 294 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 295 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 296 routename(sa) : netname(sa)); 297 sa = (struct sockaddr *)(sa->sa_len + (char *)sa); 298 (void) printf("%-20.20s ", routename(sa)); 299 (void) printf("done\n"); 300 } 301 } 302 } 303 304 char * 305 routename(sa) 306 struct sockaddr *sa; 307 { 308 register char *cp; 309 static char line[50]; 310 struct hostent *hp; 311 static char domain[MAXHOSTNAMELEN + 1]; 312 static int first = 1; 313 char *ns_print(); 314 315 if (first) { 316 first = 0; 317 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 318 (cp = index(domain, '.'))) 319 (void) strcpy(domain, cp + 1); 320 else 321 domain[0] = 0; 322 } 323 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) 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 = index(hp->h_name, '.')) && 337 !strcmp(cp + 1, domain)) 338 *cp = 0; 339 cp = hp->h_name; 340 } 341 } 342 if (cp) 343 strcpy(line, cp); 344 else { 345 #define C(x) ((x) & 0xff) 346 in.s_addr = ntohl(in.s_addr); 347 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 348 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 349 } 350 break; 351 } 352 353 #ifdef notdef 354 case AF_NS: 355 return (ns_print((struct sockaddr_ns *)sa)); 356 #endif 357 358 case AF_LINK: 359 return (link_ntoa((struct sockaddr_dl *)sa)); 360 361 #ifdef notdef 362 case AF_ISO: 363 (void) sprintf(line, "iso %s", 364 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 365 break; 366 367 #endif 368 default: 369 { u_short *s = (u_short *)sa->sa_data; 370 u_short *slim = s + ((sa->sa_len + 1) >> 1); 371 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 372 373 while (s < slim) 374 cp += sprintf(cp, " %x", *s++); 375 break; 376 } 377 } 378 return (line); 379 } 380 381 /* 382 * Return the name of the network whose address is given. 383 * The address is assumed to be that of a net or subnet, not a host. 384 */ 385 char * 386 netname(sa) 387 struct sockaddr *sa; 388 { 389 char *cp = 0; 390 static char line[50]; 391 struct netent *np = 0; 392 u_long net, mask; 393 register u_long i; 394 int subnetshift; 395 char *ns_print(); 396 397 switch (sa->sa_family) { 398 399 case AF_INET: 400 { struct in_addr in; 401 in = ((struct sockaddr_in *)sa)->sin_addr; 402 403 i = in.s_addr = ntohl(in.s_addr); 404 if (in.s_addr == 0) 405 cp = "default"; 406 else if (!nflag) { 407 if (IN_CLASSA(i)) { 408 mask = IN_CLASSA_NET; 409 subnetshift = 8; 410 } else if (IN_CLASSB(i)) { 411 mask = IN_CLASSB_NET; 412 subnetshift = 8; 413 } else { 414 mask = IN_CLASSC_NET; 415 subnetshift = 4; 416 } 417 /* 418 * If there are more bits than the standard mask 419 * would suggest, subnets must be in use. 420 * Guess at the subnet mask, assuming reasonable 421 * width subnet fields. 422 */ 423 while (in.s_addr &~ mask) 424 mask = (long)mask >> subnetshift; 425 net = in.s_addr & mask; 426 while ((mask & 1) == 0) 427 mask >>= 1, net >>= 1; 428 np = getnetbyaddr(net, AF_INET); 429 if (np) 430 cp = np->n_name; 431 } 432 if (cp) 433 strcpy(line, cp); 434 else if ((in.s_addr & 0xffffff) == 0) 435 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 436 else if ((in.s_addr & 0xffff) == 0) 437 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 438 C(in.s_addr >> 16)); 439 else if ((in.s_addr & 0xff) == 0) 440 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 441 C(in.s_addr >> 16), C(in.s_addr >> 8)); 442 else 443 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 444 C(in.s_addr >> 16), C(in.s_addr >> 8), 445 C(in.s_addr)); 446 break; 447 } 448 449 #ifdef notdef 450 case AF_NS: 451 return (ns_print((struct sockaddr_ns *)sa)); 452 break; 453 #endif 454 455 case AF_LINK: 456 return (link_ntoa((struct sockaddr_dl *)sa)); 457 458 #ifdef notdef 459 case AF_ISO: 460 (void) sprintf(line, "iso %s", 461 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 462 break; 463 #endif 464 465 default: 466 { u_short *s = (u_short *)sa->sa_data; 467 u_short *slim = s + ((sa->sa_len + 1)>>1); 468 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 469 470 while (s < slim) 471 cp += sprintf(cp, " %x", *s++); 472 break; 473 } 474 } 475 return (line); 476 } 477 478 void 479 set_metric(value, key) 480 char *value; 481 int key; 482 { 483 int flag = 0; 484 u_long noval, *valp = &noval; 485 486 switch (key) { 487 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 488 caseof(K_MTU, RTV_MTU, rmx_mtu); 489 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 490 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 491 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 492 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 493 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 494 caseof(K_RTT, RTV_RTT, rmx_rtt); 495 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 496 } 497 rtm_inits |= flag; 498 if (lockrest || locking) 499 rt_metrics.rmx_locks |= flag; 500 if (locking) 501 locking = 0; 502 *valp = atoi(value); 503 } 504 505 void 506 newroute(argc, argv) 507 int argc; 508 register char **argv; 509 { 510 char *cmd, *dest = "", *gateway = "", *err; 511 int ishost = 0, ret, attempts, oerrno, flags = 0; 512 int key; 513 struct hostent *hp = 0; 514 515 if (uid) 516 quit("must be root to alter routing table"); 517 cmd = argv[0]; 518 if (*cmd != 'g') 519 shutdown(s, 0); /* Don't want to read back our messages */ 520 while (--argc > 0) { 521 if (**(++argv)== '-') { 522 switch (key = keyword(1 + *argv)) { 523 case K_LINK: 524 af = AF_LINK; 525 aflen = sizeof(struct sockaddr_dl); 526 break; 527 #ifdef notdef 528 case K_OSI: 529 case K_ISO: 530 af = AF_ISO; 531 aflen = sizeof(struct sockaddr_iso); 532 break; 533 #endif 534 case K_INET: 535 af = AF_INET; 536 aflen = sizeof(struct sockaddr_in); 537 break; 538 #ifdef notdef 539 case K_X25: 540 af = AF_CCITT; 541 aflen = sizeof(struct sockaddr_x25); 542 break; 543 #endif 544 case K_SA: 545 af = 0; 546 aflen = sizeof(union sockunion); 547 break; 548 #ifdef notdef 549 case K_XNS: 550 af = AF_NS; 551 aflen = sizeof(struct sockaddr_ns); 552 break; 553 #endif 554 case K_IFACE: 555 case K_INTERFACE: 556 iflag++; 557 break; 558 case K_LOCK: 559 locking = 1; 560 break; 561 case K_LOCKREST: 562 lockrest = 1; 563 break; 564 case K_HOST: 565 forcehost++; 566 break; 567 case K_REJECT: 568 flags |= RTF_REJECT; 569 break; 570 case K_PROTO1: 571 flags |= RTF_PROTO1; 572 break; 573 case K_PROTO2: 574 flags |= RTF_PROTO2; 575 break; 576 case K_CLONING: 577 flags |= RTF_CLONING; 578 break; 579 case K_XRESOLVE: 580 flags |= RTF_XRESOLVE; 581 break; 582 case K_IFA: 583 argc--; 584 (void) getaddr(RTA_IFA, *++argv, 0); 585 break; 586 case K_IFP: 587 argc--; 588 (void) getaddr(RTA_IFP, *++argv, 0); 589 break; 590 case K_GENMASK: 591 argc--; 592 (void) getaddr(RTA_GENMASK, *++argv, 0); 593 break; 594 case K_GATEWAY: 595 argc--; 596 (void) getaddr(RTA_GATEWAY, *++argv, 0); 597 break; 598 case K_DST: 599 argc--; 600 ishost = getaddr(RTA_DST, *++argv, &hp); 601 dest = *argv; 602 break; 603 case K_NETMASK: 604 argc--; 605 (void) getaddr(RTA_NETMASK, *++argv, 0); 606 /* FALLTHROUGH */ 607 case K_NET: 608 forcenet++; 609 break; 610 case K_MTU: 611 case K_HOPCOUNT: 612 case K_EXPIRE: 613 case K_RECVPIPE: 614 case K_SENDPIPE: 615 case K_SSTHRESH: 616 case K_RTT: 617 case K_RTTVAR: 618 argc--; 619 set_metric(*++argv, key); 620 break; 621 default: 622 usage(1+*argv); 623 } 624 } else { 625 if ((rtm_addrs & RTA_DST) == 0) { 626 dest = *argv; 627 ishost = getaddr(RTA_DST, *argv, &hp); 628 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 629 gateway = *argv; 630 (void) getaddr(RTA_GATEWAY, *argv, &hp); 631 } else { 632 int ret = atoi(*argv); 633 if (ret == 0) { 634 printf("%s,%s", "old usage of trailing 0", 635 "assuming route to if\n"); 636 iflag = 1; 637 continue; 638 } else if (ret > 0 && ret < 10) { 639 printf("old usage of trailing digit, "); 640 printf("assuming route via gateway\n"); 641 iflag = 0; 642 continue; 643 } 644 (void) getaddr(RTA_NETMASK, *argv, 0); 645 } 646 } 647 } 648 if (forcehost) 649 ishost = 1; 650 if (forcenet) 651 ishost = 0; 652 flags |= RTF_UP; 653 if (ishost) 654 flags |= RTF_HOST; 655 if (iflag == 0) 656 flags |= RTF_GATEWAY; 657 for (attempts = 1; ; attempts++) { 658 errno = 0; 659 if (Cflag && (af == AF_INET || af == AF_NS)) { 660 route.rt_flags = flags; 661 route.rt_dst = so_dst.sa; 662 route.rt_gateway = so_gate.sa; 663 if ((ret = ioctl(s, *cmd == 'a' ? SIOCADDRT : SIOCDELRT, 664 (caddr_t)&route)) == 0) 665 break; 666 } else { 667 if ((ret = rtmsg(*cmd, flags)) == 0) 668 break; 669 } 670 if (errno != ENETUNREACH && errno != ESRCH) 671 break; 672 if (af == AF_INET && hp && hp->h_addr_list[1]) { 673 hp->h_addr_list++; 674 bcopy(hp->h_addr_list[0], (caddr_t)&so_dst.sin.sin_addr, 675 hp->h_length); 676 } else 677 break; 678 } 679 if (*cmd == 'g') 680 exit(0); 681 oerrno = errno; 682 (void) printf("%s %s %s: gateway %s", cmd, ishost? "host" : "net", 683 dest, gateway); 684 if (attempts > 1 && ret == 0) 685 (void) printf(" (%s)", 686 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 687 if (ret == 0) 688 (void) printf("\n"); 689 else { 690 switch (oerrno) { 691 case ESRCH: 692 err = "not in table"; 693 break; 694 case EBUSY: 695 err = "entry in use"; 696 break; 697 case ENOBUFS: 698 err = "routing table overflow"; 699 break; 700 default: 701 err = strerror(oerrno); 702 break; 703 } 704 (void) printf(": %s\n", err); 705 } 706 } 707 708 void 709 inet_makenetandmask(net, sin) 710 u_long net; 711 register struct sockaddr_in *sin; 712 { 713 u_long addr, mask = 0; 714 register char *cp; 715 716 rtm_addrs |= RTA_NETMASK; 717 if (net == 0) 718 mask = addr = 0; 719 else if (net < 128) { 720 addr = net << IN_CLASSA_NSHIFT; 721 mask = IN_CLASSA_NET; 722 } else if (net < 65536) { 723 addr = net << IN_CLASSB_NSHIFT; 724 mask = IN_CLASSB_NET; 725 } else if (net < 16777216L) { 726 addr = net << IN_CLASSC_NSHIFT; 727 mask = IN_CLASSC_NET; 728 } else { 729 addr = net; 730 if ((addr & IN_CLASSA_HOST) == 0) 731 mask = IN_CLASSA_NET; 732 else if ((addr & IN_CLASSB_HOST) == 0) 733 mask = IN_CLASSB_NET; 734 else if ((addr & IN_CLASSC_HOST) == 0) 735 mask = IN_CLASSC_NET; 736 else 737 mask = -1; 738 } 739 sin->sin_addr.s_addr = htonl(addr); 740 sin = &so_mask.sin; 741 sin->sin_addr.s_addr = htonl(mask); 742 sin->sin_len = 0; 743 sin->sin_family = 0; 744 cp = (char *)(&sin->sin_addr + 1); 745 while (*--cp == 0 && cp > (char *)sin) 746 ; 747 sin->sin_len = 1 + cp - (char *)sin; 748 } 749 750 /* 751 * Interpret an argument as a network address of some kind, 752 * returning 1 if a host address, 0 if a network address. 753 */ 754 int 755 getaddr(which, s, hpp) 756 int which; 757 char *s; 758 struct hostent **hpp; 759 { 760 register sup su; 761 #ifdef notdef 762 struct ns_addr ns_addr(); 763 struct iso_addr *iso_addr(); 764 #endif 765 struct hostent *hp; 766 struct netent *np; 767 u_long val; 768 769 if (af == 0) { 770 af = AF_INET; 771 aflen = sizeof(struct sockaddr_in); 772 } 773 rtm_addrs |= which; 774 switch (which) { 775 case RTA_DST: su = so_addrs[0]; su->sa.sa_family = af; break; 776 case RTA_GATEWAY: su = so_addrs[1]; su->sa.sa_family = af; break; 777 case RTA_NETMASK: su = so_addrs[2]; break; 778 case RTA_GENMASK: su = so_addrs[3]; break; 779 case RTA_IFP: su = so_addrs[4]; su->sa.sa_family = af; break; 780 case RTA_IFA: su = so_addrs[5]; su->sa.sa_family = af; break; 781 default: usage("Internal Error"); /*NOTREACHED*/ 782 } 783 su->sa.sa_len = aflen; 784 if (strcmp(s, "default") == 0) { 785 switch (which) { 786 case RTA_DST: 787 forcenet++; 788 (void) getaddr(RTA_NETMASK, s, 0); 789 break; 790 case RTA_NETMASK: 791 case RTA_GENMASK: 792 su->sa.sa_len = 0; 793 } 794 return 0; 795 } 796 #ifdef notdef 797 if (af == AF_NS) 798 goto do_xns; 799 if (af == AF_OSI) 800 goto do_osi; 801 #endif 802 if (af == AF_LINK) 803 goto do_link; 804 #ifdef notdef 805 if (af == AF_CCITT) 806 goto do_ccitt; 807 #endif 808 if (af == 0) 809 goto do_sa; 810 if (hpp == NULL) 811 hpp = &hp; 812 *hpp = NULL; 813 if (((val = inet_addr(s)) != -1) && 814 (which != RTA_DST || forcenet == 0)) { 815 su->sin.sin_addr.s_addr = val; 816 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 817 return (1); 818 else { 819 val = ntohl(val); 820 out: if (which == RTA_DST) 821 inet_makenetandmask(val, &su->sin); 822 return (0); 823 } 824 } 825 val = inet_network(s); 826 if (val != -1) { 827 goto out; 828 } 829 np = getnetbyname(s); 830 if (np) { 831 val = np->n_net; 832 goto out; 833 } 834 hp = gethostbyname(s); 835 if (hp) { 836 *hpp = hp; 837 su->sin.sin_family = hp->h_addrtype; 838 bcopy(hp->h_addr, (char *)&su->sin.sin_addr, hp->h_length); 839 return (1); 840 } 841 (void) fprintf(stderr, "%s: bad value\n", s); 842 exit(1); 843 #ifdef notdef 844 do_xns: 845 if (which == RTA_DST) { 846 extern short ns_bh[3]; 847 struct sockaddr_ns *sms = &(so_mask.sns); 848 bzero((char *)sms, sizeof(*sms)); 849 sms->sns_family = 0; 850 sms->sns_len = 6; 851 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 852 rtm_addrs |= RTA_NETMASK; 853 } 854 su->sns.sns_addr = ns_addr(s); 855 return (!ns_nullhost(su->sns.sns_addr)); 856 do_osi: 857 su->siso.siso_addr = *iso_addr(s); 858 if (which == RTA_NETMASK || which == RTA_GENMASK) { 859 register char *cp = (char *)TSEL(&su->siso); 860 su->siso.siso_nlen = 0; 861 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 862 su->siso.siso_len = 1 + cp - (char *)su; 863 } 864 return (1); 865 do_ccitt: 866 ccitt_addr(s, &su->sx25); 867 return (1); 868 #endif 869 do_link: 870 link_addr(s, &su->sdl); 871 return (1); 872 do_sa: 873 su->sa.sa_len = sizeof(*su); 874 sockaddr(s, &su->sa); 875 return (1); 876 } 877 878 #ifdef notdef 879 short ns_nullh[] = {0,0,0}; 880 short ns_bh[] = {-1,-1,-1}; 881 882 char * 883 ns_print(sns) 884 struct sockaddr_ns *sns; 885 { 886 struct ns_addr work; 887 union { union ns_net net_e; u_long long_e; } net; 888 u_short port; 889 static char mybuf[50], cport[10], chost[25]; 890 char *host = ""; 891 register char *p; 892 register u_char *q; 893 894 work = sns->sns_addr; 895 port = ntohs(work.x_port); 896 work.x_port = 0; 897 net.net_e = work.x_net; 898 if (ns_nullhost(work) && net.long_e == 0) { 899 if (!port) 900 return ("*.*"); 901 (void) sprintf(mybuf, "*.%XH", port); 902 return (mybuf); 903 } 904 905 if (bcmp((char *)ns_bh, (char *)work.x_host.c_host, 6) == 0) 906 host = "any"; 907 else if (bcmp((char *)ns_nullh, (char *)work.x_host.c_host, 6) == 0) 908 host = "*"; 909 else { 910 q = work.x_host.c_host; 911 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 912 q[0], q[1], q[2], q[3], q[4], q[5]); 913 for (p = chost; *p == '0' && p < chost + 12; p++) 914 /* void */; 915 host = p; 916 } 917 if (port) 918 (void) sprintf(cport, ".%XH", htons(port)); 919 else 920 *cport = 0; 921 922 (void) sprintf(mybuf,"%XH.%s%s", ntohl(net.long_e), host, cport); 923 return (mybuf); 924 } 925 #endif 926 927 void 928 monitor() 929 { 930 int n; 931 char msg[2048]; 932 933 verbose = 1; 934 for(;;) { 935 n = read(s, msg, 2048); 936 (void) printf("got message of size %d\n", n); 937 print_rtmsg((struct rt_msghdr *)msg); 938 } 939 } 940 941 struct { 942 struct rt_msghdr m_rtm; 943 char m_space[512]; 944 } m_rtmsg; 945 946 int 947 rtmsg(cmd, flags) 948 int cmd, flags; 949 { 950 static int seq; 951 int rlen; 952 register char *cp = m_rtmsg.m_space; 953 register int l; 954 955 #define NEXTADDR(w, u) \ 956 if (rtm_addrs & (w)) {\ 957 l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\ 958 if (verbose) sodump(&(u),"u");\ 959 } 960 961 errno = 0; 962 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 963 if (cmd == 'a') 964 cmd = RTM_ADD; 965 else if (cmd == 'c') 966 cmd = RTM_CHANGE; 967 else if (cmd == 'g') 968 cmd = RTM_GET; 969 else 970 cmd = RTM_DELETE; 971 #define rtm m_rtmsg.m_rtm 972 rtm.rtm_type = cmd; 973 rtm.rtm_flags = flags; 974 rtm.rtm_version = RTM_VERSION; 975 rtm.rtm_seq = ++seq; 976 rtm.rtm_addrs = rtm_addrs; 977 rtm.rtm_rmx = rt_metrics; 978 rtm.rtm_inits = rtm_inits; 979 980 if (rtm_addrs & RTA_NETMASK) 981 mask_addr(); 982 NEXTADDR(RTA_DST, so_dst); 983 NEXTADDR(RTA_GATEWAY, so_gate); 984 NEXTADDR(RTA_NETMASK, so_mask); 985 NEXTADDR(RTA_GENMASK, so_genmask); 986 NEXTADDR(RTA_IFP, so_ifp); 987 NEXTADDR(RTA_IFA, so_ifa); 988 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 989 if (verbose) 990 print_rtmsg(&rtm, l); 991 if (debugonly) 992 return 0; 993 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 994 perror("writing to routing socket"); 995 return (-1); 996 } 997 if (cmd == RTM_GET) { 998 do { 999 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1000 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1001 if (l < 0) 1002 (void) fprintf(stderr, 1003 "route: read from routing socket: %s\n", 1004 strerror(errno)); 1005 else 1006 print_getmsg(&rtm, l); 1007 } 1008 #undef rtm 1009 return (0); 1010 } 1011 1012 mask_addr() { 1013 register char *cp1, *cp2; 1014 int olen; 1015 1016 if ((rtm_addrs & RTA_DST) == 0) 1017 return; 1018 switch(so_dst.sa.sa_family) { 1019 #ifdef notdef 1020 case AF_NS: 1021 #endif 1022 case AF_INET: case 0: 1023 return; 1024 #ifdef notdef 1025 case AF_ISO: 1026 olen = MIN(so_dst.siso.siso_nlen, so_mask.sa.sa_len - 6); 1027 #endif 1028 } 1029 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1030 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1031 while (cp2 > cp1) 1032 *--cp2 = 0; 1033 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1034 while (cp1 > so_dst.sa.sa_data) 1035 *--cp1 &= *--cp2; 1036 #ifdef notdef 1037 switch(so_dst.sa.sa_family) { 1038 case AF_ISO: 1039 so_dst.siso.siso_nlen = olen; 1040 } 1041 #endif 1042 } 1043 1044 char *msgtypes[] = { 1045 "", 1046 "RTM_ADD: Add Route", 1047 "RTM_DELETE: Delete Route", 1048 "RTM_CHANGE: Change Metrics or flags", 1049 "RTM_GET: Report Metrics", 1050 "RTM_LOSING: Kernel Suspects Partitioning", 1051 "RTM_REDIRECT: Told to use different route", 1052 "RTM_MISS: Lookup failed on this address", 1053 "RTM_LOCK: fix specified metrics", 1054 "RTM_OLDADD: caused by SIOCADDRT", 1055 "RTM_OLDDEL: caused by SIOCDELRT", 1056 0, 1057 }; 1058 1059 char metricnames[] = 1060 "\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1061 char routeflags[] = 1062 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\017PROTO2\020PROTO1"; 1063 1064 1065 void 1066 print_rtmsg(rtm, msglen) 1067 register struct rt_msghdr *rtm; 1068 int msglen; 1069 { 1070 if (verbose == 0) 1071 return; 1072 if (rtm->rtm_version != RTM_VERSION) { 1073 (void) printf("routing message version %d not understood\n", 1074 rtm->rtm_version); 1075 return; 1076 } 1077 (void) printf("%s\npid: %d, len %d, seq %d, errno %d, flags:", 1078 msgtypes[rtm->rtm_type], rtm->rtm_pid, rtm->rtm_msglen, 1079 rtm->rtm_seq, rtm->rtm_errno); 1080 bprintf(stdout, rtm->rtm_flags, routeflags); 1081 pmsg_common(rtm); 1082 } 1083 1084 void 1085 print_getmsg(rtm, msglen) 1086 register struct rt_msghdr *rtm; 1087 int msglen; 1088 { 1089 if (rtm->rtm_version != RTM_VERSION) { 1090 (void)printf("routing message version %d not understood\n", 1091 rtm->rtm_version); 1092 return; 1093 } 1094 if (rtm->rtm_msglen > msglen) { 1095 (void)printf("get length mismatch, in packet %d, returned %d\n", 1096 rtm->rtm_msglen, msglen); 1097 } 1098 (void) printf("RTM_GET: errno %d, flags:", rtm->rtm_errno); 1099 bprintf(stdout, rtm->rtm_flags, routeflags); 1100 (void) printf("\nmetric values:\n "); 1101 #define metric(f, e)\ 1102 printf("%s: %d%s", __STRING(f), rtm->rtm_rmx.__CONCAT(rmx_,f), e) 1103 metric(recvpipe, ", "); 1104 metric(sendpipe, ", "); 1105 metric(ssthresh, ", "); 1106 metric(rtt, "\n "); 1107 metric(rttvar, ", "); 1108 metric(hopcount, ", "); 1109 metric(mtu, ", "); 1110 metric(expire, "\n"); 1111 #undef metric 1112 pmsg_common(rtm); 1113 } 1114 1115 void 1116 pmsg_common(rtm) 1117 register struct rt_msghdr *rtm; 1118 { 1119 char *cp; 1120 register struct sockaddr *sa; 1121 int i; 1122 1123 (void) printf("\nlocks: "); 1124 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1125 (void) printf(" inits: "); 1126 bprintf(stdout, rtm->rtm_inits, metricnames); 1127 (void) printf("\nsockaddrs: "); 1128 bprintf(stdout, rtm->rtm_addrs, 1129 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR"); 1130 (void) putchar('\n'); 1131 cp = ((char *)(rtm + 1)); 1132 if (rtm->rtm_addrs) 1133 for (i = 1; i; i <<= 1) 1134 if (i & rtm->rtm_addrs) { 1135 sa = (struct sockaddr *)cp; 1136 (void) printf(" %s", routename(sa)); 1137 ADVANCE(cp, sa); 1138 } 1139 (void) putchar('\n'); 1140 (void) fflush(stdout); 1141 } 1142 1143 void 1144 bprintf(fp, b, s) 1145 register FILE *fp; 1146 register int b; 1147 register u_char *s; 1148 { 1149 register int i; 1150 int gotsome = 0; 1151 1152 if (b == 0) 1153 return; 1154 while (i = *s++) { 1155 if (b & (1 << (i-1))) { 1156 if (gotsome == 0) 1157 i = '<'; 1158 else 1159 i = ','; 1160 (void) putc(i, fp); 1161 gotsome = 1; 1162 for (; (i = *s) > 32; s++) 1163 (void) putc(i, fp); 1164 } else 1165 while (*s > 32) 1166 s++; 1167 } 1168 if (gotsome) 1169 (void) putc('>', fp); 1170 } 1171 1172 int 1173 keyword(cp) 1174 char *cp; 1175 { 1176 register struct keytab *kt = keywords; 1177 1178 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1179 kt++; 1180 return kt->kt_i; 1181 } 1182 1183 void 1184 sodump(su, which) 1185 register sup su; 1186 char *which; 1187 { 1188 switch (su->sa.sa_family) { 1189 case AF_LINK: 1190 (void) printf("%s: link %s; ", 1191 which, link_ntoa(&su->sdl)); 1192 break; 1193 #ifdef notdef 1194 case AF_ISO: 1195 (void) printf("%s: iso %s; ", 1196 which, iso_ntoa(&su->siso.siso_addr)); 1197 break; 1198 #endif 1199 case AF_INET: 1200 (void) printf("%s: inet %s; ", 1201 which, inet_ntoa(su->sin.sin_addr)); 1202 break; 1203 #ifdef notdef 1204 case AF_NS: 1205 (void) printf("%s: xns %s; ", 1206 which, ns_ntoa(su->sns.sns_addr)); 1207 break; 1208 #endif 1209 } 1210 (void) fflush(stdout); 1211 } 1212 /* States*/ 1213 #define VIRGIN 0 1214 #define GOTONE 1 1215 #define GOTTWO 2 1216 /* Inputs */ 1217 #define DIGIT (4*0) 1218 #define END (4*1) 1219 #define DELIM (4*2) 1220 1221 void 1222 sockaddr(addr, sa) 1223 register char *addr; 1224 register struct sockaddr *sa; 1225 { 1226 register char *cp = (char *)sa; 1227 int size = sa->sa_len; 1228 char *cplim = cp + size; 1229 register int byte = 0, state = VIRGIN, new; 1230 1231 bzero(cp, size); 1232 do { 1233 if ((*addr >= '0') && (*addr <= '9')) { 1234 new = *addr - '0'; 1235 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1236 new = *addr - 'a' + 10; 1237 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1238 new = *addr - 'A' + 10; 1239 } else if (*addr == 0) 1240 state |= END; 1241 else 1242 state |= DELIM; 1243 addr++; 1244 switch (state /* | INPUT */) { 1245 case GOTTWO | DIGIT: 1246 *cp++ = byte; /*FALLTHROUGH*/ 1247 case VIRGIN | DIGIT: 1248 state = GOTONE; byte = new; continue; 1249 case GOTONE | DIGIT: 1250 state = GOTTWO; byte = new + (byte << 4); continue; 1251 default: /* | DELIM */ 1252 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1253 case GOTONE | END: 1254 case GOTTWO | END: 1255 *cp++ = byte; /* FALLTHROUGH */ 1256 case VIRGIN | END: 1257 break; 1258 } 1259 break; 1260 } while (cp < cplim); 1261 sa->sa_len = cp - (char *)sa; 1262 } 1263
Indexes created Thu Sep 25 16:09:42 GMT 2025