1 /* 2 * 3 * Copyright (c) 1983, 1989, 1991, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char copyright[] = 11 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 12 The Regents of the University of California. All rights reserved.\n"; 13 #endif /* not lint */ 14 15 #ifndef lint 16 static char sccsid[] = "@(#)route.c 8.2 (Berkeley) 01/02/94"; 17 #endif /* not lint */ 18 19 #include <sys/param.h> 20 #include <sys/file.h> 21 #include <sys/socket.h> 22 #include <sys/ioctl.h> 23 #include <sys/mbuf.h> 24 #include <sys/sysctl.h> 25 26 #include <net/if.h> 27 #include <net/route.h> 28 #include <net/if_dl.h> 29 #include <netinet/in.h> 30 #include <netns/ns.h> 31 #include <netiso/iso.h> 32 #include <netccitt/x25.h> 33 #include <arpa/inet.h> 34 #include <netdb.h> 35 36 #include <errno.h> 37 #include <unistd.h> 38 #include <stdio.h> 39 #include <ctype.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <paths.h> 43 44 struct keytab { 45 char *kt_cp; 46 int kt_i; 47 } keywords[] = { 48 #include "keywords.h" 49 {0, 0} 50 }; 51 52 struct ortentry route; 53 union sockunion { 54 struct sockaddr sa; 55 struct sockaddr_in sin; 56 struct sockaddr_ns sns; 57 struct sockaddr_iso siso; 58 struct sockaddr_dl sdl; 59 struct sockaddr_x25 sx25; 60 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 61 62 typedef union sockunion *sup; 63 int pid, rtm_addrs, uid; 64 int s; 65 int forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword(); 66 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 67 int locking, lockrest, debugonly; 68 struct rt_metrics rt_metrics; 69 u_long rtm_inits; 70 struct in_addr inet_makeaddr(); 71 char *routename(), *netname(); 72 void flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf(); 73 void print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr(); 74 int getaddr(), rtmsg(), x25_makemask(); 75 extern char *inet_ntoa(), *iso_ntoa(), *link_ntoa(); 76 77 __dead void 78 usage(cp) 79 char *cp; 80 { 81 if (cp) 82 (void) fprintf(stderr, "route: botched keyword: %s\n", cp); 83 (void) fprintf(stderr, 84 "usage: route [ -nqv ] cmd [[ -<qualifers> ] args ]\n"); 85 exit(1); 86 /* NOTREACHED */ 87 } 88 89 void 90 quit(s) 91 char *s; 92 { 93 int sverrno = errno; 94 95 (void) fprintf(stderr, "route: "); 96 if (s) 97 (void) fprintf(stderr, "%s: ", s); 98 (void) fprintf(stderr, "%s\n", strerror(sverrno)); 99 exit(1); 100 /* NOTREACHED */ 101 } 102 103 #define ROUNDUP(a) \ 104 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 105 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 106 107 int 108 main(argc, argv) 109 int argc; 110 char **argv; 111 { 112 extern int optind; 113 int ch; 114 115 if (argc < 2) 116 usage((char *)NULL); 117 118 while ((ch = getopt(argc, argv, "nqdtv")) != EOF) 119 switch(ch) { 120 case 'n': 121 nflag = 1; 122 break; 123 case 'q': 124 qflag = 1; 125 break; 126 case 'v': 127 verbose = 1; 128 break; 129 case 't': 130 tflag = 1; 131 break; 132 case 'd': 133 debugonly = 1; 134 break; 135 case '?': 136 default: 137 usage((char *)NULL); 138 } 139 argc -= optind; 140 argv += optind; 141 142 pid = getpid(); 143 uid = getuid(); 144 if (tflag) 145 s = open("/dev/null", O_WRONLY, 0); 146 else 147 s = socket(PF_ROUTE, SOCK_RAW, 0); 148 if (s < 0) 149 quit("socket"); 150 if (*argv) 151 switch (keyword(*argv)) { 152 case K_GET: 153 uid = 0; 154 /* FALLTHROUGH */ 155 156 case K_CHANGE: 157 case K_ADD: 158 case K_DELETE: 159 newroute(argc, argv); 160 exit(0); 161 /* NOTREACHED */ 162 163 case K_MONITOR: 164 monitor(); 165 /* NOTREACHED */ 166 167 case K_FLUSH: 168 flushroutes(argc, argv); 169 exit(0); 170 /* NOTREACHED */ 171 } 172 usage(*argv); 173 /* NOTREACHED */ 174 } 175 176 /* 177 * Purge all entries in the routing tables not 178 * associated with network interfaces. 179 */ 180 void 181 flushroutes(argc, argv) 182 int argc; 183 char *argv[]; 184 { 185 size_t needed; 186 int mib[6], rlen, seqno; 187 char *buf, *next, *lim; 188 register struct rt_msghdr *rtm; 189 190 if (uid) { 191 errno = EACCES; 192 quit("must be root to alter routing table"); 193 } 194 shutdown(s, 0); /* Don't want to read back our messages */ 195 if (argc > 1) { 196 argv++; 197 if (argc == 2 && **argv == '-') 198 switch (keyword(*argv + 1)) { 199 case K_INET: 200 af = AF_INET; 201 break; 202 case K_XNS: 203 af = AF_NS; 204 break; 205 case K_LINK: 206 af = AF_LINK; 207 break; 208 case K_ISO: 209 case K_OSI: 210 af = AF_ISO; 211 break; 212 case K_X25: 213 af = AF_CCITT; 214 default: 215 goto bad; 216 } else 217 bad: usage(*argv); 218 } 219 mib[0] = CTL_NET; 220 mib[1] = PF_ROUTE; 221 mib[2] = 0; /* protocol */ 222 mib[3] = 0; /* wildcard address family */ 223 mib[4] = NET_RT_DUMP; 224 mib[5] = 0; /* no flags */ 225 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 226 quit("route-sysctl-estimate"); 227 if ((buf = malloc(needed)) == NULL) 228 quit("malloc"); 229 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 230 quit("actual retrieval of routing table"); 231 lim = buf + needed; 232 if (verbose) 233 (void) printf("Examining routing table from sysctl\n"); 234 seqno = 0; /* ??? */ 235 for (next = buf; next < lim; next += rtm->rtm_msglen) { 236 rtm = (struct rt_msghdr *)next; 237 if (verbose) 238 print_rtmsg(rtm, rtm->rtm_msglen); 239 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 240 continue; 241 if (af) { 242 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 243 244 if (sa->sa_family != af) 245 continue; 246 } 247 if (debugonly) 248 continue; 249 rtm->rtm_type = RTM_DELETE; 250 rtm->rtm_seq = seqno; 251 rlen = write(s, next, rtm->rtm_msglen); 252 if (rlen < (int)rtm->rtm_msglen) { 253 (void) fprintf(stderr, 254 "route: write to routing socket: %s\n", 255 strerror(errno)); 256 (void) printf("got only %d for rlen\n", rlen); 257 break; 258 } 259 seqno++; 260 if (qflag) 261 continue; 262 if (verbose) 263 print_rtmsg(rtm, rlen); 264 else { 265 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 266 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 267 routename(sa) : netname(sa)); 268 sa = (struct sockaddr *)(sa->sa_len + (char *)sa); 269 (void) printf("%-20.20s ", routename(sa)); 270 (void) printf("done\n"); 271 } 272 } 273 } 274 275 char * 276 routename(sa) 277 struct sockaddr *sa; 278 { 279 register char *cp; 280 static char line[50]; 281 struct hostent *hp; 282 static char domain[MAXHOSTNAMELEN + 1]; 283 static int first = 1; 284 char *ns_print(); 285 286 if (first) { 287 first = 0; 288 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 289 (cp = index(domain, '.'))) 290 (void) strcpy(domain, cp + 1); 291 else 292 domain[0] = 0; 293 } 294 295 if (sa->sa_len == 0) 296 strcpy(line, "default"); 297 else switch (sa->sa_family) { 298 299 case AF_INET: 300 { struct in_addr in; 301 in = ((struct sockaddr_in *)sa)->sin_addr; 302 303 cp = 0; 304 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 305 cp = "default"; 306 if (cp == 0 && !nflag) { 307 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 308 AF_INET); 309 if (hp) { 310 if ((cp = index(hp->h_name, '.')) && 311 !strcmp(cp + 1, domain)) 312 *cp = 0; 313 cp = hp->h_name; 314 } 315 } 316 if (cp) 317 strcpy(line, cp); 318 else { 319 #define C(x) ((x) & 0xff) 320 in.s_addr = ntohl(in.s_addr); 321 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 322 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 323 } 324 break; 325 } 326 327 case AF_NS: 328 return (ns_print((struct sockaddr_ns *)sa)); 329 330 case AF_LINK: 331 return (link_ntoa((struct sockaddr_dl *)sa)); 332 333 case AF_ISO: 334 (void) sprintf(line, "iso %s", 335 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 336 break; 337 338 default: 339 { u_short *s = (u_short *)sa; 340 u_short *slim = s + ((sa->sa_len + 1) >> 1); 341 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 342 343 while (++s < slim) /* start with sa->sa_data */ 344 cp += sprintf(cp, " %x", *s); 345 break; 346 } 347 } 348 return (line); 349 } 350 351 /* 352 * Return the name of the network whose address is given. 353 * The address is assumed to be that of a net or subnet, not a host. 354 */ 355 char * 356 netname(sa) 357 struct sockaddr *sa; 358 { 359 char *cp = 0; 360 static char line[50]; 361 struct netent *np = 0; 362 u_long net, mask; 363 register u_long i; 364 int subnetshift; 365 char *ns_print(); 366 367 switch (sa->sa_family) { 368 369 case AF_INET: 370 { struct in_addr in; 371 in = ((struct sockaddr_in *)sa)->sin_addr; 372 373 i = in.s_addr = ntohl(in.s_addr); 374 if (in.s_addr == 0) 375 cp = "default"; 376 else if (!nflag) { 377 if (IN_CLASSA(i)) { 378 mask = IN_CLASSA_NET; 379 subnetshift = 8; 380 } else if (IN_CLASSB(i)) { 381 mask = IN_CLASSB_NET; 382 subnetshift = 8; 383 } else { 384 mask = IN_CLASSC_NET; 385 subnetshift = 4; 386 } 387 /* 388 * If there are more bits than the standard mask 389 * would suggest, subnets must be in use. 390 * Guess at the subnet mask, assuming reasonable 391 * width subnet fields. 392 */ 393 while (in.s_addr &~ mask) 394 mask = (long)mask >> subnetshift; 395 net = in.s_addr & mask; 396 while ((mask & 1) == 0) 397 mask >>= 1, net >>= 1; 398 np = getnetbyaddr(net, AF_INET); 399 if (np) 400 cp = np->n_name; 401 } 402 if (cp) 403 strcpy(line, cp); 404 else if ((in.s_addr & 0xffffff) == 0) 405 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 406 else if ((in.s_addr & 0xffff) == 0) 407 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 408 C(in.s_addr >> 16)); 409 else if ((in.s_addr & 0xff) == 0) 410 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 411 C(in.s_addr >> 16), C(in.s_addr >> 8)); 412 else 413 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 414 C(in.s_addr >> 16), C(in.s_addr >> 8), 415 C(in.s_addr)); 416 break; 417 } 418 419 case AF_NS: 420 return (ns_print((struct sockaddr_ns *)sa)); 421 break; 422 423 case AF_LINK: 424 return (link_ntoa((struct sockaddr_dl *)sa)); 425 426 case AF_ISO: 427 (void) sprintf(line, "iso %s", 428 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 429 break; 430 431 default: 432 { u_short *s = (u_short *)sa->sa_data; 433 u_short *slim = s + ((sa->sa_len + 1)>>1); 434 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 435 436 while (s < slim) 437 cp += sprintf(cp, " %x", *s++); 438 break; 439 } 440 } 441 return (line); 442 } 443 444 void 445 set_metric(value, key) 446 char *value; 447 int key; 448 { 449 int flag = 0; 450 u_long noval, *valp = &noval; 451 452 switch (key) { 453 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 454 caseof(K_MTU, RTV_MTU, rmx_mtu); 455 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 456 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 457 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 458 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 459 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 460 caseof(K_RTT, RTV_RTT, rmx_rtt); 461 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 462 } 463 rtm_inits |= flag; 464 if (lockrest || locking) 465 rt_metrics.rmx_locks |= flag; 466 if (locking) 467 locking = 0; 468 *valp = atoi(value); 469 } 470 471 void 472 newroute(argc, argv) 473 int argc; 474 register char **argv; 475 { 476 char *cmd, *dest = "", *gateway = "", *err; 477 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 478 int key; 479 struct hostent *hp = 0; 480 481 if (uid) { 482 errno = EACCES; 483 quit("must be root to alter routing table"); 484 } 485 cmd = argv[0]; 486 if (*cmd != 'g') 487 shutdown(s, 0); /* Don't want to read back our messages */ 488 while (--argc > 0) { 489 if (**(++argv)== '-') { 490 switch (key = keyword(1 + *argv)) { 491 case K_LINK: 492 af = AF_LINK; 493 aflen = sizeof(struct sockaddr_dl); 494 break; 495 case K_OSI: 496 case K_ISO: 497 af = AF_ISO; 498 aflen = sizeof(struct sockaddr_iso); 499 break; 500 case K_INET: 501 af = AF_INET; 502 aflen = sizeof(struct sockaddr_in); 503 break; 504 case K_X25: 505 af = AF_CCITT; 506 aflen = sizeof(struct sockaddr_x25); 507 break; 508 case K_SA: 509 af = PF_ROUTE; 510 aflen = sizeof(union sockunion); 511 break; 512 case K_XNS: 513 af = AF_NS; 514 aflen = sizeof(struct sockaddr_ns); 515 break; 516 case K_IFACE: 517 case K_INTERFACE: 518 iflag++; 519 case K_NOSTATIC: 520 flags &= ~RTF_STATIC; 521 break; 522 case K_LOCK: 523 locking = 1; 524 break; 525 case K_LOCKREST: 526 lockrest = 1; 527 break; 528 case K_HOST: 529 forcehost++; 530 break; 531 case K_REJECT: 532 flags |= RTF_REJECT; 533 break; 534 case K_PROTO1: 535 flags |= RTF_PROTO1; 536 break; 537 case K_PROTO2: 538 flags |= RTF_PROTO2; 539 break; 540 case K_CLONING: 541 flags |= RTF_CLONING; 542 break; 543 case K_XRESOLVE: 544 flags |= RTF_XRESOLVE; 545 break; 546 case K_STATIC: 547 flags |= RTF_STATIC; 548 break; 549 case K_IFA: 550 argc--; 551 (void) getaddr(RTA_IFA, *++argv, 0); 552 break; 553 case K_IFP: 554 argc--; 555 (void) getaddr(RTA_IFP, *++argv, 0); 556 break; 557 case K_GENMASK: 558 argc--; 559 (void) getaddr(RTA_GENMASK, *++argv, 0); 560 break; 561 case K_GATEWAY: 562 argc--; 563 (void) getaddr(RTA_GATEWAY, *++argv, 0); 564 break; 565 case K_DST: 566 argc--; 567 ishost = getaddr(RTA_DST, *++argv, &hp); 568 dest = *argv; 569 break; 570 case K_NETMASK: 571 argc--; 572 (void) getaddr(RTA_NETMASK, *++argv, 0); 573 /* FALLTHROUGH */ 574 case K_NET: 575 forcenet++; 576 break; 577 case K_MTU: 578 case K_HOPCOUNT: 579 case K_EXPIRE: 580 case K_RECVPIPE: 581 case K_SENDPIPE: 582 case K_SSTHRESH: 583 case K_RTT: 584 case K_RTTVAR: 585 argc--; 586 set_metric(*++argv, key); 587 break; 588 default: 589 usage(1+*argv); 590 } 591 } else { 592 if ((rtm_addrs & RTA_DST) == 0) { 593 dest = *argv; 594 ishost = getaddr(RTA_DST, *argv, &hp); 595 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 596 gateway = *argv; 597 (void) getaddr(RTA_GATEWAY, *argv, &hp); 598 } else { 599 int ret = atoi(*argv); 600 601 if (ret == 0) { 602 if (strcmp(*argv, "0") == 0) 603 printf("%s,%s", 604 "old usage of trailing 0", 605 "assuming route to if\n"); 606 else 607 usage((char *)NULL); 608 iflag = 1; 609 continue; 610 } else if (ret > 0 && ret < 10) { 611 printf("old usage of trailing digit, "); 612 printf("assuming route via gateway\n"); 613 iflag = 0; 614 continue; 615 } 616 (void) getaddr(RTA_NETMASK, *argv, 0); 617 } 618 } 619 } 620 if (forcehost) 621 ishost = 1; 622 if (forcenet) 623 ishost = 0; 624 flags |= RTF_UP; 625 if (ishost) 626 flags |= RTF_HOST; 627 if (iflag == 0) 628 flags |= RTF_GATEWAY; 629 for (attempts = 1; ; attempts++) { 630 errno = 0; 631 if ((ret = rtmsg(*cmd, flags)) == 0) 632 break; 633 if (errno != ENETUNREACH && errno != ESRCH) 634 break; 635 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 636 hp->h_addr_list++; 637 bcopy(hp->h_addr_list[0], &so_gate.sin.sin_addr, 638 hp->h_length); 639 } else 640 break; 641 } 642 if (*cmd == 'g') 643 exit(0); 644 oerrno = errno; 645 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 646 if (*gateway) { 647 (void) printf(": gateway %s", gateway); 648 if (attempts > 1 && ret == 0 && af == AF_INET) 649 (void) printf(" (%s)", 650 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 651 } 652 if (ret == 0) 653 (void) printf("\n"); 654 else { 655 switch (oerrno) { 656 case ESRCH: 657 err = "not in table"; 658 break; 659 case EBUSY: 660 err = "entry in use"; 661 break; 662 case ENOBUFS: 663 err = "routing table overflow"; 664 break; 665 default: 666 err = strerror(oerrno); 667 break; 668 } 669 (void) printf(": %s\n", err); 670 } 671 } 672 673 void 674 inet_makenetandmask(net, sin) 675 u_long net; 676 register struct sockaddr_in *sin; 677 { 678 u_long addr, mask = 0; 679 register char *cp; 680 681 rtm_addrs |= RTA_NETMASK; 682 if (net == 0) 683 mask = addr = 0; 684 else if (net < 128) { 685 addr = net << IN_CLASSA_NSHIFT; 686 mask = IN_CLASSA_NET; 687 } else if (net < 65536) { 688 addr = net << IN_CLASSB_NSHIFT; 689 mask = IN_CLASSB_NET; 690 } else if (net < 16777216L) { 691 addr = net << IN_CLASSC_NSHIFT; 692 mask = IN_CLASSC_NET; 693 } else { 694 addr = net; 695 if ((addr & IN_CLASSA_HOST) == 0) 696 mask = IN_CLASSA_NET; 697 else if ((addr & IN_CLASSB_HOST) == 0) 698 mask = IN_CLASSB_NET; 699 else if ((addr & IN_CLASSC_HOST) == 0) 700 mask = IN_CLASSC_NET; 701 else 702 mask = -1; 703 } 704 sin->sin_addr.s_addr = htonl(addr); 705 sin = &so_mask.sin; 706 sin->sin_addr.s_addr = htonl(mask); 707 sin->sin_len = 0; 708 sin->sin_family = 0; 709 cp = (char *)(&sin->sin_addr + 1); 710 while (*--cp == 0 && cp > (char *)sin) 711 ; 712 sin->sin_len = 1 + cp - (char *)sin; 713 } 714 715 /* 716 * Interpret an argument as a network address of some kind, 717 * returning 1 if a host address, 0 if a network address. 718 */ 719 int 720 getaddr(which, s, hpp) 721 int which; 722 char *s; 723 struct hostent **hpp; 724 { 725 register sup su; 726 struct ns_addr ns_addr(); 727 struct iso_addr *iso_addr(); 728 struct hostent *hp; 729 struct netent *np; 730 u_long val; 731 732 if (af == 0) { 733 af = AF_INET; 734 aflen = sizeof(struct sockaddr_in); 735 } 736 rtm_addrs |= which; 737 switch (which) { 738 case RTA_DST: 739 su = &so_dst; 740 su->sa.sa_family = af; 741 break; 742 case RTA_GATEWAY: 743 su = &so_gate; 744 su->sa.sa_family = af; 745 break; 746 case RTA_NETMASK: 747 su = &so_mask; 748 break; 749 case RTA_GENMASK: 750 su = &so_genmask; 751 break; 752 case RTA_IFP: 753 su = &so_ifp; 754 su->sa.sa_family = af; 755 break; 756 case RTA_IFA: 757 su = &so_ifa; 758 su->sa.sa_family = af; 759 break; 760 default: 761 usage("Internal Error"); 762 /*NOTREACHED*/ 763 } 764 su->sa.sa_len = aflen; 765 if (strcmp(s, "default") == 0) { 766 switch (which) { 767 case RTA_DST: 768 forcenet++; 769 (void) getaddr(RTA_NETMASK, s, 0); 770 break; 771 case RTA_NETMASK: 772 case RTA_GENMASK: 773 su->sa.sa_len = 0; 774 } 775 return (0); 776 } 777 switch (af) { 778 case AF_NS: 779 if (which == RTA_DST) { 780 extern short ns_bh[3]; 781 struct sockaddr_ns *sms = &(so_mask.sns); 782 bzero((char *)sms, sizeof(*sms)); 783 sms->sns_family = 0; 784 sms->sns_len = 6; 785 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 786 rtm_addrs |= RTA_NETMASK; 787 } 788 su->sns.sns_addr = ns_addr(s); 789 return (!ns_nullhost(su->sns.sns_addr)); 790 791 case AF_OSI: 792 su->siso.siso_addr = *iso_addr(s); 793 if (which == RTA_NETMASK || which == RTA_GENMASK) { 794 register char *cp = (char *)TSEL(&su->siso); 795 su->siso.siso_nlen = 0; 796 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 797 su->siso.siso_len = 1 + cp - (char *)su; 798 } 799 return (1); 800 801 case AF_LINK: 802 link_addr(s, &su->sdl); 803 return (1); 804 805 case AF_CCITT: 806 ccitt_addr(s, &su->sx25); 807 return (which == RTA_DST ? x25_makemask() : 1); 808 809 case PF_ROUTE: 810 su->sa.sa_len = sizeof(*su); 811 sockaddr(s, &su->sa); 812 return (1); 813 814 case AF_INET: 815 default: 816 break; 817 } 818 819 if (hpp == NULL) 820 hpp = &hp; 821 *hpp = NULL; 822 if (((val = inet_addr(s)) != -1) && 823 (which != RTA_DST || forcenet == 0)) { 824 su->sin.sin_addr.s_addr = val; 825 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 826 return (1); 827 else { 828 val = ntohl(val); 829 goto netdone; 830 } 831 } 832 if ((val = inet_network(s)) != -1 || 833 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 834 netdone: 835 if (which == RTA_DST) 836 inet_makenetandmask(val, &su->sin); 837 return (0); 838 } 839 hp = gethostbyname(s); 840 if (hp) { 841 *hpp = hp; 842 su->sin.sin_family = hp->h_addrtype; 843 bcopy(hp->h_addr, (char *)&su->sin.sin_addr, hp->h_length); 844 return (1); 845 } 846 (void) fprintf(stderr, "%s: bad value\n", s); 847 exit(1); 848 } 849 850 int 851 x25_makemask() 852 { 853 register char *cp; 854 855 if ((rtm_addrs & RTA_NETMASK) == 0) { 856 rtm_addrs |= RTA_NETMASK; 857 for (cp = (char *)&so_mask.sx25.x25_net; 858 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 859 *cp = -1; 860 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 861 } 862 return 0; 863 } 864 865 short ns_nullh[] = {0,0,0}; 866 short ns_bh[] = {-1,-1,-1}; 867 868 char * 869 ns_print(sns) 870 struct sockaddr_ns *sns; 871 { 872 struct ns_addr work; 873 union { union ns_net net_e; u_long long_e; } net; 874 u_short port; 875 static char mybuf[50], cport[10], chost[25]; 876 char *host = ""; 877 register char *p; 878 register u_char *q; 879 880 work = sns->sns_addr; 881 port = ntohs(work.x_port); 882 work.x_port = 0; 883 net.net_e = work.x_net; 884 if (ns_nullhost(work) && net.long_e == 0) { 885 if (!port) 886 return ("*.*"); 887 (void) sprintf(mybuf, "*.%XH", port); 888 return (mybuf); 889 } 890 891 if (bcmp((char *)ns_bh, (char *)work.x_host.c_host, 6) == 0) 892 host = "any"; 893 else if (bcmp((char *)ns_nullh, (char *)work.x_host.c_host, 6) == 0) 894 host = "*"; 895 else { 896 q = work.x_host.c_host; 897 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 898 q[0], q[1], q[2], q[3], q[4], q[5]); 899 for (p = chost; *p == '0' && p < chost + 12; p++) 900 /* void */; 901 host = p; 902 } 903 if (port) 904 (void) sprintf(cport, ".%XH", htons(port)); 905 else 906 *cport = 0; 907 908 (void) sprintf(mybuf,"%XH.%s%s", ntohl(net.long_e), host, cport); 909 return (mybuf); 910 } 911 912 void 913 interfaces() 914 { 915 size_t needed; 916 int mib[6]; 917 char *buf, *lim, *next; 918 register struct rt_msghdr *rtm; 919 920 mib[0] = CTL_NET; 921 mib[1] = PF_ROUTE; 922 mib[2] = 0; /* protocol */ 923 mib[3] = 0; /* wildcard address family */ 924 mib[4] = NET_RT_IFLIST; 925 mib[5] = 0; /* no flags */ 926 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 927 quit("route-sysctl-estimate"); 928 if ((buf = malloc(needed)) == NULL) 929 quit("malloc"); 930 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 931 quit("actual retrieval of interface table"); 932 lim = buf + needed; 933 for (next = buf; next < lim; next += rtm->rtm_msglen) { 934 rtm = (struct rt_msghdr *)next; 935 print_rtmsg(rtm, rtm->rtm_msglen); 936 } 937 } 938 939 void 940 monitor() 941 { 942 int n; 943 char msg[2048]; 944 945 verbose = 1; 946 if (debugonly) { 947 interfaces(); 948 exit(0); 949 } 950 for(;;) { 951 n = read(s, msg, 2048); 952 (void) printf("got message of size %d\n", n); 953 print_rtmsg((struct rt_msghdr *)msg, n); 954 } 955 } 956 957 struct { 958 struct rt_msghdr m_rtm; 959 char m_space[512]; 960 } m_rtmsg; 961 962 int 963 rtmsg(cmd, flags) 964 int cmd, flags; 965 { 966 static int seq; 967 int rlen; 968 register char *cp = m_rtmsg.m_space; 969 register int l; 970 971 #define NEXTADDR(w, u) \ 972 if (rtm_addrs & (w)) {\ 973 l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\ 974 if (verbose) sodump(&(u),"u");\ 975 } 976 977 errno = 0; 978 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 979 if (cmd == 'a') 980 cmd = RTM_ADD; 981 else if (cmd == 'c') 982 cmd = RTM_CHANGE; 983 else if (cmd == 'g') { 984 cmd = RTM_GET; 985 if (so_ifp.sa.sa_family == 0) { 986 so_ifp.sa.sa_family == AF_LINK; 987 so_ifp.sa.sa_len == sizeof(struct sockaddr_dl); 988 rtm_addrs |= RTA_IFP; 989 } 990 } else 991 cmd = RTM_DELETE; 992 #define rtm m_rtmsg.m_rtm 993 rtm.rtm_type = cmd; 994 rtm.rtm_flags = flags; 995 rtm.rtm_version = RTM_VERSION; 996 rtm.rtm_seq = ++seq; 997 rtm.rtm_addrs = rtm_addrs; 998 rtm.rtm_rmx = rt_metrics; 999 rtm.rtm_inits = rtm_inits; 1000 1001 if (rtm_addrs & RTA_NETMASK) 1002 mask_addr(); 1003 NEXTADDR(RTA_DST, so_dst); 1004 NEXTADDR(RTA_GATEWAY, so_gate); 1005 NEXTADDR(RTA_NETMASK, so_mask); 1006 NEXTADDR(RTA_GENMASK, so_genmask); 1007 NEXTADDR(RTA_IFP, so_ifp); 1008 NEXTADDR(RTA_IFA, so_ifa); 1009 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1010 if (verbose) 1011 print_rtmsg(&rtm, l); 1012 if (debugonly) 1013 return (0); 1014 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1015 perror("writing to routing socket"); 1016 return (-1); 1017 } 1018 if (cmd == RTM_GET) { 1019 do { 1020 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1021 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1022 if (l < 0) 1023 (void) fprintf(stderr, 1024 "route: read from routing socket: %s\n", 1025 strerror(errno)); 1026 else 1027 print_getmsg(&rtm, l); 1028 } 1029 #undef rtm 1030 return (0); 1031 } 1032 1033 void 1034 mask_addr() 1035 { 1036 int olen = so_mask.sa.sa_len; 1037 register char *cp1 = olen + (char *)&so_mask, *cp2; 1038 1039 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1040 if (*--cp1 != 0) { 1041 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1042 break; 1043 } 1044 if ((rtm_addrs & RTA_DST) == 0) 1045 return; 1046 switch (so_dst.sa.sa_family) { 1047 case AF_NS: 1048 case AF_INET: 1049 case AF_CCITT: 1050 case 0: 1051 return; 1052 case AF_ISO: 1053 olen = MIN(so_dst.siso.siso_nlen, 1054 MAX(so_mask.sa.sa_len - 6, 0)); 1055 break; 1056 } 1057 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1058 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1059 while (cp2 > cp1) 1060 *--cp2 = 0; 1061 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1062 while (cp1 > so_dst.sa.sa_data) 1063 *--cp1 &= *--cp2; 1064 switch (so_dst.sa.sa_family) { 1065 case AF_ISO: 1066 so_dst.siso.siso_nlen = olen; 1067 break; 1068 } 1069 } 1070 1071 char *msgtypes[] = { 1072 "", 1073 "RTM_ADD: Add Route", 1074 "RTM_DELETE: Delete Route", 1075 "RTM_CHANGE: Change Metrics or flags", 1076 "RTM_GET: Report Metrics", 1077 "RTM_LOSING: Kernel Suspects Partitioning", 1078 "RTM_REDIRECT: Told to use different route", 1079 "RTM_MISS: Lookup failed on this address", 1080 "RTM_LOCK: fix specified metrics", 1081 "RTM_OLDADD: caused by SIOCADDRT", 1082 "RTM_OLDDEL: caused by SIOCDELRT", 1083 "RTM_RESOLVE: Route created by cloning", 1084 "RTM_NEWADDR: address being added to iface", 1085 "RTM_DELADDR: address being removed from iface", 1086 "RTM_IFINFO: iface status change", 1087 0, 1088 }; 1089 1090 char metricnames[] = 1091 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1092 char routeflags[] = 1093 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\017PROTO2\020PROTO1"; 1094 char ifnetflags[] = 1095 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1096 char addrnames[] = 1097 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1098 1099 void 1100 print_rtmsg(rtm, msglen) 1101 register struct rt_msghdr *rtm; 1102 int msglen; 1103 { 1104 struct if_msghdr *ifm; 1105 struct ifa_msghdr *ifam; 1106 1107 if (verbose == 0) 1108 return; 1109 if (rtm->rtm_version != RTM_VERSION) { 1110 (void) printf("routing message version %d not understood\n", 1111 rtm->rtm_version); 1112 return; 1113 } 1114 (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen); 1115 switch (rtm->rtm_type) { 1116 case RTM_IFINFO: 1117 ifm = (struct if_msghdr *)rtm; 1118 (void) printf("if# %d, flags:", ifm->ifm_index); 1119 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1120 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1121 break; 1122 case RTM_NEWADDR: 1123 case RTM_DELADDR: 1124 ifam = (struct ifa_msghdr *)rtm; 1125 (void) printf("metric %d, flags:", ifam->ifam_metric); 1126 bprintf(stdout, ifam->ifam_flags, routeflags); 1127 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1128 break; 1129 default: 1130 (void) printf("pid: %d, seq %d, errno %d, flags:", 1131 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1132 bprintf(stdout, rtm->rtm_flags, routeflags); 1133 pmsg_common(rtm); 1134 } 1135 } 1136 1137 void 1138 print_getmsg(rtm, msglen) 1139 register struct rt_msghdr *rtm; 1140 int msglen; 1141 { 1142 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1143 struct sockaddr_dl *ifp = NULL; 1144 register struct sockaddr *sa; 1145 register char *cp; 1146 register int i; 1147 1148 (void) printf(" route to: %s\n", routename(&so_dst)); 1149 if (rtm->rtm_version != RTM_VERSION) { 1150 (void)fprintf(stderr, 1151 "routing message version %d not understood\n", 1152 rtm->rtm_version); 1153 return; 1154 } 1155 if (rtm->rtm_msglen > msglen) { 1156 (void)fprintf(stderr, 1157 "message length mismatch, in packet %d, returned %d\n", 1158 rtm->rtm_msglen, msglen); 1159 } 1160 if (rtm->rtm_errno) { 1161 (void) fprintf(stderr, "RTM_GET: %s (errno %d)\n", 1162 strerror(rtm->rtm_errno), rtm->rtm_errno); 1163 return; 1164 } 1165 cp = ((char *)(rtm + 1)); 1166 if (rtm->rtm_addrs) 1167 for (i = 1; i; i <<= 1) 1168 if (i & rtm->rtm_addrs) { 1169 sa = (struct sockaddr *)cp; 1170 switch (i) { 1171 case RTA_DST: 1172 dst = sa; 1173 break; 1174 case RTA_GATEWAY: 1175 gate = sa; 1176 break; 1177 case RTA_NETMASK: 1178 mask = sa; 1179 break; 1180 case RTA_IFP: 1181 if (sa->sa_family == AF_LINK && 1182 ((struct sockaddr_dl *)sa)->sdl_nlen) 1183 ifp = (struct sockaddr_dl *)sa; 1184 break; 1185 } 1186 ADVANCE(cp, sa); 1187 } 1188 if (dst && mask) 1189 mask->sa_family = dst->sa_family; /* XXX */ 1190 if (dst) 1191 (void)printf("destination: %s\n", routename(dst)); 1192 if (mask) { 1193 int savenflag = nflag; 1194 1195 nflag = 1; 1196 (void)printf(" mask: %s\n", routename(mask)); 1197 nflag = savenflag; 1198 } 1199 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1200 (void)printf(" gateway: %s\n", routename(gate)); 1201 if (ifp) 1202 (void)printf(" interface: %.*s\n", 1203 ifp->sdl_nlen, ifp->sdl_data); 1204 (void)printf(" flags: "); 1205 bprintf(stdout, rtm->rtm_flags, routeflags); 1206 1207 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1208 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1209 1210 (void) printf("\n%s\n", "\ 1211 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1212 printf("%8d%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1213 printf("%8d%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1214 printf("%8d%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1215 printf("%8d%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1216 printf("%8d%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1217 printf("%8d%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1218 printf("%8d%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1219 if (rtm->rtm_rmx.rmx_expire) 1220 rtm->rtm_rmx.rmx_expire -= time(0); 1221 printf("%8d%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1222 #undef lock 1223 #undef msec 1224 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1225 if (verbose) 1226 pmsg_common(rtm); 1227 else if (rtm->rtm_addrs &~ RTA_IGN) { 1228 (void) printf("sockaddrs: "); 1229 bprintf(stdout, rtm->rtm_addrs, addrnames); 1230 putchar('\n'); 1231 } 1232 #undef RTA_IGN 1233 } 1234 1235 void 1236 pmsg_common(rtm) 1237 register struct rt_msghdr *rtm; 1238 { 1239 (void) printf("\nlocks: "); 1240 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1241 (void) printf(" inits: "); 1242 bprintf(stdout, rtm->rtm_inits, metricnames); 1243 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1244 } 1245 1246 void 1247 pmsg_addrs(cp, addrs) 1248 char *cp; 1249 int addrs; 1250 { 1251 register struct sockaddr *sa; 1252 int i; 1253 1254 if (addrs == 0) 1255 return; 1256 (void) printf("\nsockaddrs: "); 1257 bprintf(stdout, addrs, addrnames); 1258 (void) putchar('\n'); 1259 for (i = 1; i; i <<= 1) 1260 if (i & addrs) { 1261 sa = (struct sockaddr *)cp; 1262 (void) printf(" %s", routename(sa)); 1263 ADVANCE(cp, sa); 1264 } 1265 (void) putchar('\n'); 1266 (void) fflush(stdout); 1267 } 1268 1269 void 1270 bprintf(fp, b, s) 1271 register FILE *fp; 1272 register int b; 1273 register u_char *s; 1274 { 1275 register int i; 1276 int gotsome = 0; 1277 1278 if (b == 0) 1279 return; 1280 while (i = *s++) { 1281 if (b & (1 << (i-1))) { 1282 if (gotsome == 0) 1283 i = '<'; 1284 else 1285 i = ','; 1286 (void) putc(i, fp); 1287 gotsome = 1; 1288 for (; (i = *s) > 32; s++) 1289 (void) putc(i, fp); 1290 } else 1291 while (*s > 32) 1292 s++; 1293 } 1294 if (gotsome) 1295 (void) putc('>', fp); 1296 } 1297 1298 int 1299 keyword(cp) 1300 char *cp; 1301 { 1302 register struct keytab *kt = keywords; 1303 1304 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1305 kt++; 1306 return kt->kt_i; 1307 } 1308 1309 void 1310 sodump(su, which) 1311 register sup su; 1312 char *which; 1313 { 1314 switch (su->sa.sa_family) { 1315 case AF_LINK: 1316 (void) printf("%s: link %s; ", 1317 which, link_ntoa(&su->sdl)); 1318 break; 1319 case AF_ISO: 1320 (void) printf("%s: iso %s; ", 1321 which, iso_ntoa(&su->siso.siso_addr)); 1322 break; 1323 case AF_INET: 1324 (void) printf("%s: inet %s; ", 1325 which, inet_ntoa(su->sin.sin_addr)); 1326 break; 1327 case AF_NS: 1328 (void) printf("%s: xns %s; ", 1329 which, ns_ntoa(su->sns.sns_addr)); 1330 break; 1331 } 1332 (void) fflush(stdout); 1333 } 1334 1335 /* States*/ 1336 #define VIRGIN 0 1337 #define GOTONE 1 1338 #define GOTTWO 2 1339 /* Inputs */ 1340 #define DIGIT (4*0) 1341 #define END (4*1) 1342 #define DELIM (4*2) 1343 1344 void 1345 sockaddr(addr, sa) 1346 register char *addr; 1347 register struct sockaddr *sa; 1348 { 1349 register char *cp = (char *)sa; 1350 int size = sa->sa_len; 1351 char *cplim = cp + size; 1352 register int byte = 0, state = VIRGIN, new; 1353 1354 bzero(cp, size); 1355 cp++; 1356 do { 1357 if ((*addr >= '0') && (*addr <= '9')) { 1358 new = *addr - '0'; 1359 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1360 new = *addr - 'a' + 10; 1361 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1362 new = *addr - 'A' + 10; 1363 } else if (*addr == 0) 1364 state |= END; 1365 else 1366 state |= DELIM; 1367 addr++; 1368 switch (state /* | INPUT */) { 1369 case GOTTWO | DIGIT: 1370 *cp++ = byte; /*FALLTHROUGH*/ 1371 case VIRGIN | DIGIT: 1372 state = GOTONE; byte = new; continue; 1373 case GOTONE | DIGIT: 1374 state = GOTTWO; byte = new + (byte << 4); continue; 1375 default: /* | DELIM */ 1376 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1377 case GOTONE | END: 1378 case GOTTWO | END: 1379 *cp++ = byte; /* FALLTHROUGH */ 1380 case VIRGIN | END: 1381 break; 1382 } 1383 break; 1384 } while (cp < cplim); 1385 sa->sa_len = cp - (char *)sa; 1386 } 1387