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 8.1 (Berkeley) 06/05/93"; 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(); 74 int getaddr(), rtmsg(), x25_makemask(); 75 extern char *inet_ntoa(), *iso_ntoa(), *link_ntoa(); 76 77 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 main(argc, argv) 108 int argc; 109 char **argv; 110 { 111 extern int optind; 112 int ch; 113 char *argvp; 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 quit("must be root to alter routing table"); 192 shutdown(s, 0); /* Don't want to read back our messages */ 193 if (argc > 1) { 194 argv++; 195 if (argc == 2 && **argv == '-') 196 switch (keyword(*argv + 1)) { 197 case K_INET: 198 af = AF_INET; 199 break; 200 case K_XNS: 201 af = AF_NS; 202 break; 203 case K_LINK: 204 af = AF_LINK; 205 break; 206 case K_ISO: 207 case K_OSI: 208 af = AF_ISO; 209 break; 210 case K_X25: 211 af = AF_CCITT; 212 default: 213 goto bad; 214 } else 215 bad: usage(*argv); 216 } 217 mib[0] = CTL_NET; 218 mib[1] = PF_ROUTE; 219 mib[2] = 0; /* protocol */ 220 mib[3] = 0; /* wildcard address family */ 221 mib[4] = NET_RT_DUMP; 222 mib[5] = 0; /* no flags */ 223 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 224 quit("route-sysctl-estimate"); 225 if ((buf = malloc(needed)) == NULL) 226 quit("malloc"); 227 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 228 quit("actual retrieval of routing table"); 229 lim = buf + needed; 230 if (verbose) 231 (void) printf("Examining routing table from sysctl\n"); 232 seqno = 0; /* ??? */ 233 for (next = buf; next < lim; next += rtm->rtm_msglen) { 234 rtm = (struct rt_msghdr *)next; 235 if (verbose) 236 print_rtmsg(rtm, rtm->rtm_msglen); 237 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 238 continue; 239 if (af) { 240 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 241 242 if (sa->sa_family != af) 243 continue; 244 } 245 if (debugonly) 246 continue; 247 rtm->rtm_type = RTM_DELETE; 248 rtm->rtm_seq = seqno; 249 rlen = write(s, next, rtm->rtm_msglen); 250 if (rlen < (int)rtm->rtm_msglen) { 251 (void) fprintf(stderr, 252 "route: write to routing socket: %s\n", 253 strerror(errno)); 254 (void) printf("got only %d for rlen\n", rlen); 255 break; 256 } 257 seqno++; 258 if (qflag) 259 continue; 260 if (verbose) 261 print_rtmsg(rtm, rlen); 262 else { 263 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 264 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 265 routename(sa) : netname(sa)); 266 sa = (struct sockaddr *)(sa->sa_len + (char *)sa); 267 (void) printf("%-20.20s ", routename(sa)); 268 (void) printf("done\n"); 269 } 270 } 271 } 272 273 char * 274 routename(sa) 275 struct sockaddr *sa; 276 { 277 register char *cp; 278 static char line[50]; 279 struct hostent *hp; 280 static char domain[MAXHOSTNAMELEN + 1]; 281 static int first = 1; 282 char *ns_print(); 283 284 if (first) { 285 first = 0; 286 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 287 (cp = index(domain, '.'))) 288 (void) strcpy(domain, cp + 1); 289 else 290 domain[0] = 0; 291 } 292 293 if (sa->sa_len == 0) 294 strcpy(line, "default"); 295 else switch (sa->sa_family) { 296 297 case AF_INET: 298 { struct in_addr in; 299 in = ((struct sockaddr_in *)sa)->sin_addr; 300 301 cp = 0; 302 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 303 cp = "default"; 304 if (cp == 0 && !nflag) { 305 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 306 AF_INET); 307 if (hp) { 308 if ((cp = index(hp->h_name, '.')) && 309 !strcmp(cp + 1, domain)) 310 *cp = 0; 311 cp = hp->h_name; 312 } 313 } 314 if (cp) 315 strcpy(line, cp); 316 else { 317 #define C(x) ((x) & 0xff) 318 in.s_addr = ntohl(in.s_addr); 319 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 320 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 321 } 322 break; 323 } 324 325 case AF_NS: 326 return (ns_print((struct sockaddr_ns *)sa)); 327 328 case AF_LINK: 329 return (link_ntoa((struct sockaddr_dl *)sa)); 330 331 case AF_ISO: 332 (void) sprintf(line, "iso %s", 333 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 334 break; 335 336 default: 337 { u_short *s = (u_short *)sa; 338 u_short *slim = s + ((sa->sa_len + 1) >> 1); 339 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 340 341 while (++s < slim) /* start with sa->sa_data */ 342 cp += sprintf(cp, " %x", *s); 343 break; 344 } 345 } 346 return (line); 347 } 348 349 /* 350 * Return the name of the network whose address is given. 351 * The address is assumed to be that of a net or subnet, not a host. 352 */ 353 char * 354 netname(sa) 355 struct sockaddr *sa; 356 { 357 char *cp = 0; 358 static char line[50]; 359 struct netent *np = 0; 360 u_long net, mask; 361 register u_long i; 362 int subnetshift; 363 char *ns_print(); 364 365 switch (sa->sa_family) { 366 367 case AF_INET: 368 { struct in_addr in; 369 in = ((struct sockaddr_in *)sa)->sin_addr; 370 371 i = in.s_addr = ntohl(in.s_addr); 372 if (in.s_addr == 0) 373 cp = "default"; 374 else if (!nflag) { 375 if (IN_CLASSA(i)) { 376 mask = IN_CLASSA_NET; 377 subnetshift = 8; 378 } else if (IN_CLASSB(i)) { 379 mask = IN_CLASSB_NET; 380 subnetshift = 8; 381 } else { 382 mask = IN_CLASSC_NET; 383 subnetshift = 4; 384 } 385 /* 386 * If there are more bits than the standard mask 387 * would suggest, subnets must be in use. 388 * Guess at the subnet mask, assuming reasonable 389 * width subnet fields. 390 */ 391 while (in.s_addr &~ mask) 392 mask = (long)mask >> subnetshift; 393 net = in.s_addr & mask; 394 while ((mask & 1) == 0) 395 mask >>= 1, net >>= 1; 396 np = getnetbyaddr(net, AF_INET); 397 if (np) 398 cp = np->n_name; 399 } 400 if (cp) 401 strcpy(line, cp); 402 else if ((in.s_addr & 0xffffff) == 0) 403 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 404 else if ((in.s_addr & 0xffff) == 0) 405 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 406 C(in.s_addr >> 16)); 407 else if ((in.s_addr & 0xff) == 0) 408 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 409 C(in.s_addr >> 16), C(in.s_addr >> 8)); 410 else 411 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 412 C(in.s_addr >> 16), C(in.s_addr >> 8), 413 C(in.s_addr)); 414 break; 415 } 416 417 case AF_NS: 418 return (ns_print((struct sockaddr_ns *)sa)); 419 break; 420 421 case AF_LINK: 422 return (link_ntoa((struct sockaddr_dl *)sa)); 423 424 case AF_ISO: 425 (void) sprintf(line, "iso %s", 426 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 427 break; 428 429 default: 430 { u_short *s = (u_short *)sa->sa_data; 431 u_short *slim = s + ((sa->sa_len + 1)>>1); 432 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 433 434 while (s < slim) 435 cp += sprintf(cp, " %x", *s++); 436 break; 437 } 438 } 439 return (line); 440 } 441 442 void 443 set_metric(value, key) 444 char *value; 445 int key; 446 { 447 int flag = 0; 448 u_long noval, *valp = &noval; 449 450 switch (key) { 451 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 452 caseof(K_MTU, RTV_MTU, rmx_mtu); 453 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 454 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 455 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 456 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 457 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 458 caseof(K_RTT, RTV_RTT, rmx_rtt); 459 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 460 } 461 rtm_inits |= flag; 462 if (lockrest || locking) 463 rt_metrics.rmx_locks |= flag; 464 if (locking) 465 locking = 0; 466 *valp = atoi(value); 467 } 468 469 void 470 newroute(argc, argv) 471 int argc; 472 register char **argv; 473 { 474 char *cmd, *dest = "", *gateway = "", *err; 475 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 476 int key; 477 struct hostent *hp = 0; 478 479 if (uid) 480 quit("must be root to alter routing table"); 481 cmd = argv[0]; 482 if (*cmd != 'g') 483 shutdown(s, 0); /* Don't want to read back our messages */ 484 while (--argc > 0) { 485 if (**(++argv)== '-') { 486 switch (key = keyword(1 + *argv)) { 487 case K_LINK: 488 af = AF_LINK; 489 aflen = sizeof(struct sockaddr_dl); 490 break; 491 case K_OSI: 492 case K_ISO: 493 af = AF_ISO; 494 aflen = sizeof(struct sockaddr_iso); 495 break; 496 case K_INET: 497 af = AF_INET; 498 aflen = sizeof(struct sockaddr_in); 499 break; 500 case K_X25: 501 af = AF_CCITT; 502 aflen = sizeof(struct sockaddr_x25); 503 break; 504 case K_SA: 505 af = PF_ROUTE; 506 aflen = sizeof(union sockunion); 507 break; 508 case K_XNS: 509 af = AF_NS; 510 aflen = sizeof(struct sockaddr_ns); 511 break; 512 case K_IFACE: 513 case K_INTERFACE: 514 iflag++; 515 case K_NOSTATIC: 516 flags &= ~RTF_STATIC; 517 break; 518 case K_LOCK: 519 locking = 1; 520 break; 521 case K_LOCKREST: 522 lockrest = 1; 523 break; 524 case K_HOST: 525 forcehost++; 526 break; 527 case K_REJECT: 528 flags |= RTF_REJECT; 529 break; 530 case K_PROTO1: 531 flags |= RTF_PROTO1; 532 break; 533 case K_PROTO2: 534 flags |= RTF_PROTO2; 535 break; 536 case K_CLONING: 537 flags |= RTF_CLONING; 538 break; 539 case K_XRESOLVE: 540 flags |= RTF_XRESOLVE; 541 break; 542 case K_STATIC: 543 flags |= RTF_STATIC; 544 break; 545 case K_IFA: 546 argc--; 547 (void) getaddr(RTA_IFA, *++argv, 0); 548 break; 549 case K_IFP: 550 argc--; 551 (void) getaddr(RTA_IFP, *++argv, 0); 552 break; 553 case K_GENMASK: 554 argc--; 555 (void) getaddr(RTA_GENMASK, *++argv, 0); 556 break; 557 case K_GATEWAY: 558 argc--; 559 (void) getaddr(RTA_GATEWAY, *++argv, 0); 560 break; 561 case K_DST: 562 argc--; 563 ishost = getaddr(RTA_DST, *++argv, &hp); 564 dest = *argv; 565 break; 566 case K_NETMASK: 567 argc--; 568 (void) getaddr(RTA_NETMASK, *++argv, 0); 569 /* FALLTHROUGH */ 570 case K_NET: 571 forcenet++; 572 break; 573 case K_MTU: 574 case K_HOPCOUNT: 575 case K_EXPIRE: 576 case K_RECVPIPE: 577 case K_SENDPIPE: 578 case K_SSTHRESH: 579 case K_RTT: 580 case K_RTTVAR: 581 argc--; 582 set_metric(*++argv, key); 583 break; 584 default: 585 usage(1+*argv); 586 } 587 } else { 588 if ((rtm_addrs & RTA_DST) == 0) { 589 dest = *argv; 590 ishost = getaddr(RTA_DST, *argv, &hp); 591 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 592 gateway = *argv; 593 (void) getaddr(RTA_GATEWAY, *argv, &hp); 594 } else { 595 int ret = atoi(*argv); 596 597 if (ret == 0) { 598 if (strcmp(*argv, "0") == 0) 599 printf("%s,%s", 600 "old usage of trailing 0", 601 "assuming route to if\n"); 602 else 603 usage((char *)NULL); 604 iflag = 1; 605 continue; 606 } else if (ret > 0 && ret < 10) { 607 printf("old usage of trailing digit, "); 608 printf("assuming route via gateway\n"); 609 iflag = 0; 610 continue; 611 } 612 (void) getaddr(RTA_NETMASK, *argv, 0); 613 } 614 } 615 } 616 if (forcehost) 617 ishost = 1; 618 if (forcenet) 619 ishost = 0; 620 flags |= RTF_UP; 621 if (ishost) 622 flags |= RTF_HOST; 623 if (iflag == 0) 624 flags |= RTF_GATEWAY; 625 for (attempts = 1; ; attempts++) { 626 errno = 0; 627 if ((ret = rtmsg(*cmd, flags)) == 0) 628 break; 629 if (errno != ENETUNREACH && errno != ESRCH) 630 break; 631 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 632 hp->h_addr_list++; 633 bcopy(hp->h_addr_list[0], &so_gate.sin.sin_addr, 634 hp->h_length); 635 } else 636 break; 637 } 638 if (*cmd == 'g') 639 exit(0); 640 oerrno = errno; 641 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 642 if (*gateway) { 643 (void) printf(": gateway %s", gateway); 644 if (attempts > 1 && ret == 0 && af == AF_INET) 645 (void) printf(" (%s)", 646 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 647 } 648 if (ret == 0) 649 (void) printf("\n"); 650 else { 651 switch (oerrno) { 652 case ESRCH: 653 err = "not in table"; 654 break; 655 case EBUSY: 656 err = "entry in use"; 657 break; 658 case ENOBUFS: 659 err = "routing table overflow"; 660 break; 661 default: 662 err = strerror(oerrno); 663 break; 664 } 665 (void) printf(": %s\n", err); 666 } 667 } 668 669 void 670 inet_makenetandmask(net, sin) 671 u_long net; 672 register struct sockaddr_in *sin; 673 { 674 u_long addr, mask = 0; 675 register char *cp; 676 677 rtm_addrs |= RTA_NETMASK; 678 if (net == 0) 679 mask = addr = 0; 680 else if (net < 128) { 681 addr = net << IN_CLASSA_NSHIFT; 682 mask = IN_CLASSA_NET; 683 } else if (net < 65536) { 684 addr = net << IN_CLASSB_NSHIFT; 685 mask = IN_CLASSB_NET; 686 } else if (net < 16777216L) { 687 addr = net << IN_CLASSC_NSHIFT; 688 mask = IN_CLASSC_NET; 689 } else { 690 addr = net; 691 if ((addr & IN_CLASSA_HOST) == 0) 692 mask = IN_CLASSA_NET; 693 else if ((addr & IN_CLASSB_HOST) == 0) 694 mask = IN_CLASSB_NET; 695 else if ((addr & IN_CLASSC_HOST) == 0) 696 mask = IN_CLASSC_NET; 697 else 698 mask = -1; 699 } 700 sin->sin_addr.s_addr = htonl(addr); 701 sin = &so_mask.sin; 702 sin->sin_addr.s_addr = htonl(mask); 703 sin->sin_len = 0; 704 sin->sin_family = 0; 705 cp = (char *)(&sin->sin_addr + 1); 706 while (*--cp == 0 && cp > (char *)sin) 707 ; 708 sin->sin_len = 1 + cp - (char *)sin; 709 } 710 711 /* 712 * Interpret an argument as a network address of some kind, 713 * returning 1 if a host address, 0 if a network address. 714 */ 715 int 716 getaddr(which, s, hpp) 717 int which; 718 char *s; 719 struct hostent **hpp; 720 { 721 register sup su; 722 struct ns_addr ns_addr(); 723 struct iso_addr *iso_addr(); 724 struct hostent *hp; 725 struct netent *np; 726 u_long val; 727 728 if (af == 0) { 729 af = AF_INET; 730 aflen = sizeof(struct sockaddr_in); 731 } 732 rtm_addrs |= which; 733 switch (which) { 734 case RTA_DST: 735 su = &so_dst; 736 su->sa.sa_family = af; 737 break; 738 case RTA_GATEWAY: 739 su = &so_gate; 740 su->sa.sa_family = af; 741 break; 742 case RTA_NETMASK: 743 su = &so_mask; 744 break; 745 case RTA_GENMASK: 746 su = &so_genmask; 747 break; 748 case RTA_IFP: 749 su = &so_ifp; 750 su->sa.sa_family = af; 751 break; 752 case RTA_IFA: 753 su = &so_ifa; 754 su->sa.sa_family = af; 755 break; 756 default: 757 usage("Internal Error"); 758 /*NOTREACHED*/ 759 } 760 su->sa.sa_len = aflen; 761 if (strcmp(s, "default") == 0) { 762 switch (which) { 763 case RTA_DST: 764 forcenet++; 765 (void) getaddr(RTA_NETMASK, s, 0); 766 break; 767 case RTA_NETMASK: 768 case RTA_GENMASK: 769 su->sa.sa_len = 0; 770 } 771 return (0); 772 } 773 switch (af) { 774 case AF_NS: 775 if (which == RTA_DST) { 776 extern short ns_bh[3]; 777 struct sockaddr_ns *sms = &(so_mask.sns); 778 bzero((char *)sms, sizeof(*sms)); 779 sms->sns_family = 0; 780 sms->sns_len = 6; 781 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 782 rtm_addrs |= RTA_NETMASK; 783 } 784 su->sns.sns_addr = ns_addr(s); 785 return (!ns_nullhost(su->sns.sns_addr)); 786 787 case AF_OSI: 788 su->siso.siso_addr = *iso_addr(s); 789 if (which == RTA_NETMASK || which == RTA_GENMASK) { 790 register char *cp = (char *)TSEL(&su->siso); 791 su->siso.siso_nlen = 0; 792 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 793 su->siso.siso_len = 1 + cp - (char *)su; 794 } 795 return (1); 796 797 case AF_LINK: 798 link_addr(s, &su->sdl); 799 return (1); 800 801 case AF_CCITT: 802 ccitt_addr(s, &su->sx25); 803 return (which == RTA_DST ? x25_makemask() : 1); 804 805 case PF_ROUTE: 806 su->sa.sa_len = sizeof(*su); 807 sockaddr(s, &su->sa); 808 return (1); 809 810 case AF_INET: 811 default: 812 break; 813 } 814 815 if (hpp == NULL) 816 hpp = &hp; 817 *hpp = NULL; 818 if (((val = inet_addr(s)) != -1) && 819 (which != RTA_DST || forcenet == 0)) { 820 su->sin.sin_addr.s_addr = val; 821 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 822 return (1); 823 else { 824 val = ntohl(val); 825 goto netdone; 826 } 827 } 828 if ((val = inet_network(s)) != -1 || 829 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 830 netdone: 831 if (which == RTA_DST) 832 inet_makenetandmask(val, &su->sin); 833 return (0); 834 } 835 hp = gethostbyname(s); 836 if (hp) { 837 *hpp = hp; 838 su->sin.sin_family = hp->h_addrtype; 839 bcopy(hp->h_addr, (char *)&su->sin.sin_addr, hp->h_length); 840 return (1); 841 } 842 (void) fprintf(stderr, "%s: bad value\n", s); 843 exit(1); 844 } 845 846 x25_makemask() 847 { 848 register char *cp; 849 850 if ((rtm_addrs & RTA_NETMASK) == 0) { 851 rtm_addrs |= RTA_NETMASK; 852 for (cp = (char *)&so_mask.sx25.x25_net; 853 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 854 *cp = -1; 855 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 856 } 857 return 0; 858 } 859 860 short ns_nullh[] = {0,0,0}; 861 short ns_bh[] = {-1,-1,-1}; 862 863 char * 864 ns_print(sns) 865 struct sockaddr_ns *sns; 866 { 867 struct ns_addr work; 868 union { union ns_net net_e; u_long long_e; } net; 869 u_short port; 870 static char mybuf[50], cport[10], chost[25]; 871 char *host = ""; 872 register char *p; 873 register u_char *q; 874 875 work = sns->sns_addr; 876 port = ntohs(work.x_port); 877 work.x_port = 0; 878 net.net_e = work.x_net; 879 if (ns_nullhost(work) && net.long_e == 0) { 880 if (!port) 881 return ("*.*"); 882 (void) sprintf(mybuf, "*.%XH", port); 883 return (mybuf); 884 } 885 886 if (bcmp((char *)ns_bh, (char *)work.x_host.c_host, 6) == 0) 887 host = "any"; 888 else if (bcmp((char *)ns_nullh, (char *)work.x_host.c_host, 6) == 0) 889 host = "*"; 890 else { 891 q = work.x_host.c_host; 892 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 893 q[0], q[1], q[2], q[3], q[4], q[5]); 894 for (p = chost; *p == '0' && p < chost + 12; p++) 895 /* void */; 896 host = p; 897 } 898 if (port) 899 (void) sprintf(cport, ".%XH", htons(port)); 900 else 901 *cport = 0; 902 903 (void) sprintf(mybuf,"%XH.%s%s", ntohl(net.long_e), host, cport); 904 return (mybuf); 905 } 906 907 void 908 interfaces() 909 { 910 size_t needed; 911 int mib[6], af; 912 char *buf, *lim, *next; 913 register struct rt_msghdr *rtm; 914 915 mib[0] = CTL_NET; 916 mib[1] = PF_ROUTE; 917 mib[2] = 0; /* protocol */ 918 mib[3] = 0; /* wildcard address family */ 919 mib[4] = NET_RT_IFLIST; 920 mib[5] = 0; /* no flags */ 921 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 922 quit("route-sysctl-estimate"); 923 if ((buf = malloc(needed)) == NULL) 924 quit("malloc"); 925 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 926 quit("actual retrieval of interface table"); 927 lim = buf + needed; 928 for (next = buf; next < lim; next += rtm->rtm_msglen) { 929 rtm = (struct rt_msghdr *)next; 930 print_rtmsg(rtm, rtm->rtm_msglen); 931 } 932 } 933 934 void 935 monitor() 936 { 937 int n; 938 char msg[2048]; 939 940 verbose = 1; 941 if (debugonly) { 942 interfaces(); 943 exit(0); 944 } 945 for(;;) { 946 n = read(s, msg, 2048); 947 (void) printf("got message of size %d\n", n); 948 print_rtmsg((struct rt_msghdr *)msg, n); 949 } 950 } 951 952 struct { 953 struct rt_msghdr m_rtm; 954 char m_space[512]; 955 } m_rtmsg; 956 957 int 958 rtmsg(cmd, flags) 959 int cmd, flags; 960 { 961 static int seq; 962 int rlen; 963 register char *cp = m_rtmsg.m_space; 964 register int l; 965 966 #define NEXTADDR(w, u) \ 967 if (rtm_addrs & (w)) {\ 968 l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\ 969 if (verbose) sodump(&(u),"u");\ 970 } 971 972 errno = 0; 973 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 974 if (cmd == 'a') 975 cmd = RTM_ADD; 976 else if (cmd == 'c') 977 cmd = RTM_CHANGE; 978 else if (cmd == 'g') { 979 cmd = RTM_GET; 980 if (so_ifp.sa.sa_family == 0) { 981 so_ifp.sa.sa_family == AF_LINK; 982 so_ifp.sa.sa_len == sizeof(struct sockaddr_dl); 983 rtm_addrs |= RTA_IFP; 984 } 985 } else 986 cmd = RTM_DELETE; 987 #define rtm m_rtmsg.m_rtm 988 rtm.rtm_type = cmd; 989 rtm.rtm_flags = flags; 990 rtm.rtm_version = RTM_VERSION; 991 rtm.rtm_seq = ++seq; 992 rtm.rtm_addrs = rtm_addrs; 993 rtm.rtm_rmx = rt_metrics; 994 rtm.rtm_inits = rtm_inits; 995 996 if (rtm_addrs & RTA_NETMASK) 997 mask_addr(); 998 NEXTADDR(RTA_DST, so_dst); 999 NEXTADDR(RTA_GATEWAY, so_gate); 1000 NEXTADDR(RTA_NETMASK, so_mask); 1001 NEXTADDR(RTA_GENMASK, so_genmask); 1002 NEXTADDR(RTA_IFP, so_ifp); 1003 NEXTADDR(RTA_IFA, so_ifa); 1004 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1005 if (verbose) 1006 print_rtmsg(&rtm, l); 1007 if (debugonly) 1008 return (0); 1009 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1010 perror("writing to routing socket"); 1011 return (-1); 1012 } 1013 if (cmd == RTM_GET) { 1014 do { 1015 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1016 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1017 if (l < 0) 1018 (void) fprintf(stderr, 1019 "route: read from routing socket: %s\n", 1020 strerror(errno)); 1021 else 1022 print_getmsg(&rtm, l); 1023 } 1024 #undef rtm 1025 return (0); 1026 } 1027 1028 mask_addr() 1029 { 1030 int olen = so_mask.sa.sa_len; 1031 register char *cp1 = olen + (char *)&so_mask, *cp2; 1032 1033 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1034 if (*--cp1 != 0) { 1035 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1036 break; 1037 } 1038 if ((rtm_addrs & RTA_DST) == 0) 1039 return; 1040 switch (so_dst.sa.sa_family) { 1041 case AF_NS: 1042 case AF_INET: 1043 case AF_CCITT: 1044 case 0: 1045 return; 1046 case AF_ISO: 1047 olen = MIN(so_dst.siso.siso_nlen, 1048 MAX(so_mask.sa.sa_len - 6, 0)); 1049 break; 1050 } 1051 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1052 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1053 while (cp2 > cp1) 1054 *--cp2 = 0; 1055 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1056 while (cp1 > so_dst.sa.sa_data) 1057 *--cp1 &= *--cp2; 1058 switch (so_dst.sa.sa_family) { 1059 case AF_ISO: 1060 so_dst.siso.siso_nlen = olen; 1061 break; 1062 } 1063 } 1064 1065 char *msgtypes[] = { 1066 "", 1067 "RTM_ADD: Add Route", 1068 "RTM_DELETE: Delete Route", 1069 "RTM_CHANGE: Change Metrics or flags", 1070 "RTM_GET: Report Metrics", 1071 "RTM_LOSING: Kernel Suspects Partitioning", 1072 "RTM_REDIRECT: Told to use different route", 1073 "RTM_MISS: Lookup failed on this address", 1074 "RTM_LOCK: fix specified metrics", 1075 "RTM_OLDADD: caused by SIOCADDRT", 1076 "RTM_OLDDEL: caused by SIOCDELRT", 1077 "RTM_RESOLVE: Route created by cloning", 1078 "RTM_NEWADDR: address being added to iface", 1079 "RTM_DELADDR: address being removed from iface", 1080 "RTM_IFINFO: iface status change", 1081 0, 1082 }; 1083 1084 char metricnames[] = 1085 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1086 char routeflags[] = 1087 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\017PROTO2\020PROTO1"; 1088 char ifnetflags[] = 1089 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1090 char addrnames[] = 1091 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1092 1093 void 1094 print_rtmsg(rtm, msglen) 1095 register struct rt_msghdr *rtm; 1096 int msglen; 1097 { 1098 struct if_msghdr *ifm; 1099 struct ifa_msghdr *ifam; 1100 1101 if (verbose == 0) 1102 return; 1103 if (rtm->rtm_version != RTM_VERSION) { 1104 (void) printf("routing message version %d not understood\n", 1105 rtm->rtm_version); 1106 return; 1107 } 1108 (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen); 1109 switch (rtm->rtm_type) { 1110 case RTM_IFINFO: 1111 ifm = (struct if_msghdr *)rtm; 1112 (void) printf("if# %d, flags:", ifm->ifm_index); 1113 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1114 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1115 break; 1116 case RTM_NEWADDR: 1117 case RTM_DELADDR: 1118 ifam = (struct ifa_msghdr *)rtm; 1119 (void) printf("metric %d, flags:", ifam->ifam_metric); 1120 bprintf(stdout, ifam->ifam_flags, routeflags); 1121 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1122 break; 1123 default: 1124 (void) printf("pid: %d, seq %d, errno %d, flags:", 1125 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1126 bprintf(stdout, rtm->rtm_flags, routeflags); 1127 pmsg_common(rtm); 1128 } 1129 } 1130 1131 void 1132 print_getmsg(rtm, msglen) 1133 register struct rt_msghdr *rtm; 1134 int msglen; 1135 { 1136 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1137 struct sockaddr_dl *ifp = NULL; 1138 register struct sockaddr *sa; 1139 register char *cp; 1140 register int i; 1141 1142 (void) printf(" route to: %s\n", routename(&so_dst)); 1143 if (rtm->rtm_version != RTM_VERSION) { 1144 (void)fprintf(stderr, 1145 "routing message version %d not understood\n", 1146 rtm->rtm_version); 1147 return; 1148 } 1149 if (rtm->rtm_msglen > msglen) { 1150 (void)fprintf(stderr, 1151 "message length mismatch, in packet %d, returned %d\n", 1152 rtm->rtm_msglen, msglen); 1153 } 1154 if (rtm->rtm_errno) { 1155 (void) fprintf(stderr, "RTM_GET: %s (errno %d)\n", 1156 strerror(rtm->rtm_errno), rtm->rtm_errno); 1157 return; 1158 } 1159 cp = ((char *)(rtm + 1)); 1160 if (rtm->rtm_addrs) 1161 for (i = 1; i; i <<= 1) 1162 if (i & rtm->rtm_addrs) { 1163 sa = (struct sockaddr *)cp; 1164 switch (i) { 1165 case RTA_DST: 1166 dst = sa; 1167 break; 1168 case RTA_GATEWAY: 1169 gate = sa; 1170 break; 1171 case RTA_NETMASK: 1172 mask = sa; 1173 break; 1174 case RTA_IFP: 1175 if (sa->sa_family == AF_LINK && 1176 ((struct sockaddr_dl *)sa)->sdl_nlen) 1177 ifp = (struct sockaddr_dl *)sa; 1178 break; 1179 } 1180 ADVANCE(cp, sa); 1181 } 1182 if (dst && mask) 1183 mask->sa_family = dst->sa_family; /* XXX */ 1184 if (dst) 1185 (void)printf("destination: %s\n", routename(dst)); 1186 if (mask) { 1187 int savenflag = nflag; 1188 1189 nflag = 1; 1190 (void)printf(" mask: %s\n", routename(mask)); 1191 nflag = savenflag; 1192 } 1193 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1194 (void)printf(" gateway: %s\n", routename(gate)); 1195 if (ifp) 1196 (void)printf(" interface: %.*s\n", 1197 ifp->sdl_nlen, ifp->sdl_data); 1198 (void)printf(" flags: "); 1199 bprintf(stdout, rtm->rtm_flags, routeflags); 1200 1201 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1202 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1203 1204 (void) printf("\n%s\n", "\ 1205 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1206 printf("%8d%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1207 printf("%8d%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1208 printf("%8d%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1209 printf("%8d%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1210 printf("%8d%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1211 printf("%8d%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1212 printf("%8d%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1213 if (rtm->rtm_rmx.rmx_expire) 1214 rtm->rtm_rmx.rmx_expire -= time(0); 1215 printf("%8d%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1216 #undef lock 1217 #undef msec 1218 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1219 if (verbose) 1220 pmsg_common(rtm); 1221 else if (rtm->rtm_addrs &~ RTA_IGN) { 1222 (void) printf("sockaddrs: "); 1223 bprintf(stdout, rtm->rtm_addrs, addrnames); 1224 putchar('\n'); 1225 } 1226 #undef RTA_IGN 1227 } 1228 1229 void 1230 pmsg_common(rtm) 1231 register struct rt_msghdr *rtm; 1232 { 1233 (void) printf("\nlocks: "); 1234 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1235 (void) printf(" inits: "); 1236 bprintf(stdout, rtm->rtm_inits, metricnames); 1237 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1238 } 1239 1240 void 1241 pmsg_addrs(cp, addrs) 1242 char *cp; 1243 int addrs; 1244 { 1245 register struct sockaddr *sa; 1246 int i; 1247 1248 if (addrs == 0) 1249 return; 1250 (void) printf("\nsockaddrs: "); 1251 bprintf(stdout, addrs, addrnames); 1252 (void) putchar('\n'); 1253 for (i = 1; i; i <<= 1) 1254 if (i & addrs) { 1255 sa = (struct sockaddr *)cp; 1256 (void) printf(" %s", routename(sa)); 1257 ADVANCE(cp, sa); 1258 } 1259 (void) putchar('\n'); 1260 (void) fflush(stdout); 1261 } 1262 1263 void 1264 bprintf(fp, b, s) 1265 register FILE *fp; 1266 register int b; 1267 register u_char *s; 1268 { 1269 register int i; 1270 int gotsome = 0; 1271 1272 if (b == 0) 1273 return; 1274 while (i = *s++) { 1275 if (b & (1 << (i-1))) { 1276 if (gotsome == 0) 1277 i = '<'; 1278 else 1279 i = ','; 1280 (void) putc(i, fp); 1281 gotsome = 1; 1282 for (; (i = *s) > 32; s++) 1283 (void) putc(i, fp); 1284 } else 1285 while (*s > 32) 1286 s++; 1287 } 1288 if (gotsome) 1289 (void) putc('>', fp); 1290 } 1291 1292 int 1293 keyword(cp) 1294 char *cp; 1295 { 1296 register struct keytab *kt = keywords; 1297 1298 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1299 kt++; 1300 return kt->kt_i; 1301 } 1302 1303 void 1304 sodump(su, which) 1305 register sup su; 1306 char *which; 1307 { 1308 switch (su->sa.sa_family) { 1309 case AF_LINK: 1310 (void) printf("%s: link %s; ", 1311 which, link_ntoa(&su->sdl)); 1312 break; 1313 case AF_ISO: 1314 (void) printf("%s: iso %s; ", 1315 which, iso_ntoa(&su->siso.siso_addr)); 1316 break; 1317 case AF_INET: 1318 (void) printf("%s: inet %s; ", 1319 which, inet_ntoa(su->sin.sin_addr)); 1320 break; 1321 case AF_NS: 1322 (void) printf("%s: xns %s; ", 1323 which, ns_ntoa(su->sns.sns_addr)); 1324 break; 1325 } 1326 (void) fflush(stdout); 1327 } 1328 1329 /* States*/ 1330 #define VIRGIN 0 1331 #define GOTONE 1 1332 #define GOTTWO 2 1333 /* Inputs */ 1334 #define DIGIT (4*0) 1335 #define END (4*1) 1336 #define DELIM (4*2) 1337 1338 void 1339 sockaddr(addr, sa) 1340 register char *addr; 1341 register struct sockaddr *sa; 1342 { 1343 register char *cp = (char *)sa; 1344 int size = sa->sa_len; 1345 char *cplim = cp + size; 1346 register int byte = 0, state = VIRGIN, new; 1347 1348 bzero(cp, size); 1349 cp++; 1350 do { 1351 if ((*addr >= '0') && (*addr <= '9')) { 1352 new = *addr - '0'; 1353 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1354 new = *addr - 'a' + 10; 1355 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1356 new = *addr - 'A' + 10; 1357 } else if (*addr == 0) 1358 state |= END; 1359 else 1360 state |= DELIM; 1361 addr++; 1362 switch (state /* | INPUT */) { 1363 case GOTTWO | DIGIT: 1364 *cp++ = byte; /*FALLTHROUGH*/ 1365 case VIRGIN | DIGIT: 1366 state = GOTONE; byte = new; continue; 1367 case GOTONE | DIGIT: 1368 state = GOTTWO; byte = new + (byte << 4); continue; 1369 default: /* | DELIM */ 1370 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1371 case GOTONE | END: 1372 case GOTTWO | END: 1373 *cp++ = byte; /* FALLTHROUGH */ 1374 case VIRGIN | END: 1375 break; 1376 } 1377 break; 1378 } while (cp < cplim); 1379 sa->sa_len = cp - (char *)sa; 1380 } 1381