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 8.6 (Berkeley) 04/28/95"; 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 = strchr(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 = strchr(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_BLACKHOLE: 535 flags |= RTF_BLACKHOLE; 536 break; 537 case K_PROTO1: 538 flags |= RTF_PROTO1; 539 break; 540 case K_PROTO2: 541 flags |= RTF_PROTO2; 542 break; 543 case K_CLONING: 544 flags |= RTF_CLONING; 545 break; 546 case K_XRESOLVE: 547 flags |= RTF_XRESOLVE; 548 break; 549 case K_STATIC: 550 flags |= RTF_STATIC; 551 break; 552 case K_IFA: 553 argc--; 554 (void) getaddr(RTA_IFA, *++argv, 0); 555 break; 556 case K_IFP: 557 argc--; 558 (void) getaddr(RTA_IFP, *++argv, 0); 559 break; 560 case K_GENMASK: 561 argc--; 562 (void) getaddr(RTA_GENMASK, *++argv, 0); 563 break; 564 case K_GATEWAY: 565 argc--; 566 (void) getaddr(RTA_GATEWAY, *++argv, 0); 567 break; 568 case K_DST: 569 argc--; 570 ishost = getaddr(RTA_DST, *++argv, &hp); 571 dest = *argv; 572 break; 573 case K_NETMASK: 574 argc--; 575 (void) getaddr(RTA_NETMASK, *++argv, 0); 576 /* FALLTHROUGH */ 577 case K_NET: 578 forcenet++; 579 break; 580 case K_MTU: 581 case K_HOPCOUNT: 582 case K_EXPIRE: 583 case K_RECVPIPE: 584 case K_SENDPIPE: 585 case K_SSTHRESH: 586 case K_RTT: 587 case K_RTTVAR: 588 argc--; 589 set_metric(*++argv, key); 590 break; 591 default: 592 usage(1+*argv); 593 } 594 } else { 595 if ((rtm_addrs & RTA_DST) == 0) { 596 dest = *argv; 597 ishost = getaddr(RTA_DST, *argv, &hp); 598 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 599 gateway = *argv; 600 (void) getaddr(RTA_GATEWAY, *argv, &hp); 601 } else { 602 int ret = atoi(*argv); 603 604 if (ret == 0) { 605 if (strcmp(*argv, "0") == 0) 606 printf("%s,%s", 607 "old usage of trailing 0", 608 "assuming route to if\n"); 609 else 610 usage((char *)NULL); 611 iflag = 1; 612 continue; 613 } else if (ret > 0 && ret < 10) { 614 printf("old usage of trailing digit, "); 615 printf("assuming route via gateway\n"); 616 iflag = 0; 617 continue; 618 } 619 (void) getaddr(RTA_NETMASK, *argv, 0); 620 } 621 } 622 } 623 if (forcehost) 624 ishost = 1; 625 if (forcenet) 626 ishost = 0; 627 flags |= RTF_UP; 628 if (ishost) 629 flags |= RTF_HOST; 630 if (iflag == 0) 631 flags |= RTF_GATEWAY; 632 for (attempts = 1; ; attempts++) { 633 errno = 0; 634 if ((ret = rtmsg(*cmd, flags)) == 0) 635 break; 636 if (errno != ENETUNREACH && errno != ESRCH) 637 break; 638 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 639 hp->h_addr_list++; 640 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 641 hp->h_length); 642 } else 643 break; 644 } 645 if (*cmd == 'g') 646 exit(0); 647 oerrno = errno; 648 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 649 if (*gateway) { 650 (void) printf(": gateway %s", gateway); 651 if (attempts > 1 && ret == 0 && af == AF_INET) 652 (void) printf(" (%s)", 653 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 654 } 655 if (ret == 0) 656 (void) printf("\n"); 657 else { 658 switch (oerrno) { 659 case ESRCH: 660 err = "not in table"; 661 break; 662 case EBUSY: 663 err = "entry in use"; 664 break; 665 case ENOBUFS: 666 err = "routing table overflow"; 667 break; 668 default: 669 err = strerror(oerrno); 670 break; 671 } 672 (void) printf(": %s\n", err); 673 } 674 } 675 676 void 677 inet_makenetandmask(net, sin) 678 u_long net; 679 register struct sockaddr_in *sin; 680 { 681 u_long addr, mask = 0; 682 register char *cp; 683 684 rtm_addrs |= RTA_NETMASK; 685 if (net == 0) 686 mask = addr = 0; 687 else if (net < 128) { 688 addr = net << IN_CLASSA_NSHIFT; 689 mask = IN_CLASSA_NET; 690 } else if (net < 65536) { 691 addr = net << IN_CLASSB_NSHIFT; 692 mask = IN_CLASSB_NET; 693 } else if (net < 16777216L) { 694 addr = net << IN_CLASSC_NSHIFT; 695 mask = IN_CLASSC_NET; 696 } else { 697 addr = net; 698 if ((addr & IN_CLASSA_HOST) == 0) 699 mask = IN_CLASSA_NET; 700 else if ((addr & IN_CLASSB_HOST) == 0) 701 mask = IN_CLASSB_NET; 702 else if ((addr & IN_CLASSC_HOST) == 0) 703 mask = IN_CLASSC_NET; 704 else 705 mask = -1; 706 } 707 sin->sin_addr.s_addr = htonl(addr); 708 sin = &so_mask.sin; 709 sin->sin_addr.s_addr = htonl(mask); 710 sin->sin_len = 0; 711 sin->sin_family = 0; 712 cp = (char *)(&sin->sin_addr + 1); 713 while (*--cp == 0 && cp > (char *)sin) 714 ; 715 sin->sin_len = 1 + cp - (char *)sin; 716 } 717 718 /* 719 * Interpret an argument as a network address of some kind, 720 * returning 1 if a host address, 0 if a network address. 721 */ 722 int 723 getaddr(which, s, hpp) 724 int which; 725 char *s; 726 struct hostent **hpp; 727 { 728 register sup su; 729 struct ns_addr ns_addr(); 730 struct iso_addr *iso_addr(); 731 struct hostent *hp; 732 struct netent *np; 733 u_long val; 734 735 if (af == 0) { 736 af = AF_INET; 737 aflen = sizeof(struct sockaddr_in); 738 } 739 rtm_addrs |= which; 740 switch (which) { 741 case RTA_DST: 742 su = &so_dst; 743 su->sa.sa_family = af; 744 break; 745 case RTA_GATEWAY: 746 su = &so_gate; 747 su->sa.sa_family = af; 748 break; 749 case RTA_NETMASK: 750 su = &so_mask; 751 break; 752 case RTA_GENMASK: 753 su = &so_genmask; 754 break; 755 case RTA_IFP: 756 su = &so_ifp; 757 su->sa.sa_family = af; 758 break; 759 case RTA_IFA: 760 su = &so_ifa; 761 su->sa.sa_family = af; 762 break; 763 default: 764 usage("Internal Error"); 765 /*NOTREACHED*/ 766 } 767 su->sa.sa_len = aflen; 768 if (strcmp(s, "default") == 0) { 769 switch (which) { 770 case RTA_DST: 771 forcenet++; 772 (void) getaddr(RTA_NETMASK, s, 0); 773 break; 774 case RTA_NETMASK: 775 case RTA_GENMASK: 776 su->sa.sa_len = 0; 777 } 778 return (0); 779 } 780 switch (af) { 781 case AF_NS: 782 if (which == RTA_DST) { 783 extern short ns_bh[3]; 784 struct sockaddr_ns *sms = &(so_mask.sns); 785 memset(sms, 0, sizeof(*sms)); 786 sms->sns_family = 0; 787 sms->sns_len = 6; 788 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 789 rtm_addrs |= RTA_NETMASK; 790 } 791 su->sns.sns_addr = ns_addr(s); 792 return (!ns_nullhost(su->sns.sns_addr)); 793 794 case AF_OSI: 795 su->siso.siso_addr = *iso_addr(s); 796 if (which == RTA_NETMASK || which == RTA_GENMASK) { 797 register char *cp = (char *)TSEL(&su->siso); 798 su->siso.siso_nlen = 0; 799 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 800 su->siso.siso_len = 1 + cp - (char *)su; 801 } 802 return (1); 803 804 case AF_LINK: 805 link_addr(s, &su->sdl); 806 return (1); 807 808 case AF_CCITT: 809 ccitt_addr(s, &su->sx25); 810 return (which == RTA_DST ? x25_makemask() : 1); 811 812 case PF_ROUTE: 813 su->sa.sa_len = sizeof(*su); 814 sockaddr(s, &su->sa); 815 return (1); 816 817 case AF_INET: 818 default: 819 break; 820 } 821 822 if (hpp == NULL) 823 hpp = &hp; 824 *hpp = NULL; 825 if (((val = inet_addr(s)) != -1) && 826 (which != RTA_DST || forcenet == 0)) { 827 su->sin.sin_addr.s_addr = val; 828 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 829 return (1); 830 else { 831 val = ntohl(val); 832 goto netdone; 833 } 834 } 835 if ((val = inet_network(s)) != -1 || 836 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 837 netdone: 838 if (which == RTA_DST) 839 inet_makenetandmask(val, &su->sin); 840 return (0); 841 } 842 hp = gethostbyname(s); 843 if (hp) { 844 *hpp = hp; 845 su->sin.sin_family = hp->h_addrtype; 846 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 847 return (1); 848 } 849 (void) fprintf(stderr, "%s: bad value\n", s); 850 exit(1); 851 } 852 853 int 854 x25_makemask() 855 { 856 register char *cp; 857 858 if ((rtm_addrs & RTA_NETMASK) == 0) { 859 rtm_addrs |= RTA_NETMASK; 860 for (cp = (char *)&so_mask.sx25.x25_net; 861 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 862 *cp = -1; 863 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 864 } 865 return 0; 866 } 867 868 short ns_nullh[] = {0,0,0}; 869 short ns_bh[] = {-1,-1,-1}; 870 871 char * 872 ns_print(sns) 873 struct sockaddr_ns *sns; 874 { 875 struct ns_addr work; 876 union { union ns_net net_e; u_long long_e; } net; 877 u_short port; 878 static char mybuf[50], cport[10], chost[25]; 879 char *host = ""; 880 register char *p; 881 register u_char *q; 882 883 work = sns->sns_addr; 884 port = ntohs(work.x_port); 885 work.x_port = 0; 886 net.net_e = work.x_net; 887 if (ns_nullhost(work) && net.long_e == 0) { 888 if (!port) 889 return ("*.*"); 890 (void) sprintf(mybuf, "*.%XH", port); 891 return (mybuf); 892 } 893 894 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 895 host = "any"; 896 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 897 host = "*"; 898 else { 899 q = work.x_host.c_host; 900 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 901 q[0], q[1], q[2], q[3], q[4], q[5]); 902 for (p = chost; *p == '0' && p < chost + 12; p++) 903 /* void */; 904 host = p; 905 } 906 if (port) 907 (void) sprintf(cport, ".%XH", htons(port)); 908 else 909 *cport = 0; 910 911 (void) sprintf(mybuf,"%XH.%s%s", ntohl(net.long_e), host, cport); 912 return (mybuf); 913 } 914 915 void 916 interfaces() 917 { 918 size_t needed; 919 int mib[6]; 920 char *buf, *lim, *next; 921 register struct rt_msghdr *rtm; 922 923 mib[0] = CTL_NET; 924 mib[1] = PF_ROUTE; 925 mib[2] = 0; /* protocol */ 926 mib[3] = 0; /* wildcard address family */ 927 mib[4] = NET_RT_IFLIST; 928 mib[5] = 0; /* no flags */ 929 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 930 quit("route-sysctl-estimate"); 931 if ((buf = malloc(needed)) == NULL) 932 quit("malloc"); 933 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 934 quit("actual retrieval of interface table"); 935 lim = buf + needed; 936 for (next = buf; next < lim; next += rtm->rtm_msglen) { 937 rtm = (struct rt_msghdr *)next; 938 print_rtmsg(rtm, rtm->rtm_msglen); 939 } 940 } 941 942 void 943 monitor() 944 { 945 int n; 946 char msg[2048]; 947 948 verbose = 1; 949 if (debugonly) { 950 interfaces(); 951 exit(0); 952 } 953 for(;;) { 954 n = read(s, msg, 2048); 955 (void) printf("got message of size %d\n", n); 956 print_rtmsg((struct rt_msghdr *)msg, n); 957 } 958 } 959 960 struct { 961 struct rt_msghdr m_rtm; 962 char m_space[512]; 963 } m_rtmsg; 964 965 int 966 rtmsg(cmd, flags) 967 int cmd, flags; 968 { 969 static int seq; 970 int rlen; 971 register char *cp = m_rtmsg.m_space; 972 register int l; 973 974 #define NEXTADDR(w, u) \ 975 if (rtm_addrs & (w)) {\ 976 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 977 if (verbose) sodump(&(u),"u");\ 978 } 979 980 errno = 0; 981 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 982 if (cmd == 'a') 983 cmd = RTM_ADD; 984 else if (cmd == 'c') 985 cmd = RTM_CHANGE; 986 else if (cmd == 'g') { 987 cmd = RTM_GET; 988 if (so_ifp.sa.sa_family == 0) { 989 so_ifp.sa.sa_family = AF_LINK; 990 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 991 rtm_addrs |= RTA_IFP; 992 } 993 } else 994 cmd = RTM_DELETE; 995 #define rtm m_rtmsg.m_rtm 996 rtm.rtm_type = cmd; 997 rtm.rtm_flags = flags; 998 rtm.rtm_version = RTM_VERSION; 999 rtm.rtm_seq = ++seq; 1000 rtm.rtm_addrs = rtm_addrs; 1001 rtm.rtm_rmx = rt_metrics; 1002 rtm.rtm_inits = rtm_inits; 1003 1004 if (rtm_addrs & RTA_NETMASK) 1005 mask_addr(); 1006 NEXTADDR(RTA_DST, so_dst); 1007 NEXTADDR(RTA_GATEWAY, so_gate); 1008 NEXTADDR(RTA_NETMASK, so_mask); 1009 NEXTADDR(RTA_GENMASK, so_genmask); 1010 NEXTADDR(RTA_IFP, so_ifp); 1011 NEXTADDR(RTA_IFA, so_ifa); 1012 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1013 if (verbose) 1014 print_rtmsg(&rtm, l); 1015 if (debugonly) 1016 return (0); 1017 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1018 perror("writing to routing socket"); 1019 return (-1); 1020 } 1021 if (cmd == RTM_GET) { 1022 do { 1023 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1024 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1025 if (l < 0) 1026 (void) fprintf(stderr, 1027 "route: read from routing socket: %s\n", 1028 strerror(errno)); 1029 else 1030 print_getmsg(&rtm, l); 1031 } 1032 #undef rtm 1033 return (0); 1034 } 1035 1036 void 1037 mask_addr() 1038 { 1039 int olen = so_mask.sa.sa_len; 1040 register char *cp1 = olen + (char *)&so_mask, *cp2; 1041 1042 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1043 if (*--cp1 != 0) { 1044 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1045 break; 1046 } 1047 if ((rtm_addrs & RTA_DST) == 0) 1048 return; 1049 switch (so_dst.sa.sa_family) { 1050 case AF_NS: 1051 case AF_INET: 1052 case AF_CCITT: 1053 case 0: 1054 return; 1055 case AF_ISO: 1056 olen = MIN(so_dst.siso.siso_nlen, 1057 MAX(so_mask.sa.sa_len - 6, 0)); 1058 break; 1059 } 1060 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1061 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1062 while (cp2 > cp1) 1063 *--cp2 = 0; 1064 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1065 while (cp1 > so_dst.sa.sa_data) 1066 *--cp1 &= *--cp2; 1067 switch (so_dst.sa.sa_family) { 1068 case AF_ISO: 1069 so_dst.siso.siso_nlen = olen; 1070 break; 1071 } 1072 } 1073 1074 char *msgtypes[] = { 1075 "", 1076 "RTM_ADD: Add Route", 1077 "RTM_DELETE: Delete Route", 1078 "RTM_CHANGE: Change Metrics or flags", 1079 "RTM_GET: Report Metrics", 1080 "RTM_LOSING: Kernel Suspects Partitioning", 1081 "RTM_REDIRECT: Told to use different route", 1082 "RTM_MISS: Lookup failed on this address", 1083 "RTM_LOCK: fix specified metrics", 1084 "RTM_OLDADD: caused by SIOCADDRT", 1085 "RTM_OLDDEL: caused by SIOCDELRT", 1086 "RTM_RESOLVE: Route created by cloning", 1087 "RTM_NEWADDR: address being added to iface", 1088 "RTM_DELADDR: address being removed from iface", 1089 "RTM_IFINFO: iface status change", 1090 0, 1091 }; 1092 1093 char metricnames[] = 1094 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1095 char routeflags[] = 1096 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\017PROTO2\020PROTO1"; 1097 char ifnetflags[] = 1098 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1099 char addrnames[] = 1100 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1101 1102 void 1103 print_rtmsg(rtm, msglen) 1104 register struct rt_msghdr *rtm; 1105 int msglen; 1106 { 1107 struct if_msghdr *ifm; 1108 struct ifa_msghdr *ifam; 1109 1110 if (verbose == 0) 1111 return; 1112 if (rtm->rtm_version != RTM_VERSION) { 1113 (void) printf("routing message version %d not understood\n", 1114 rtm->rtm_version); 1115 return; 1116 } 1117 (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen); 1118 switch (rtm->rtm_type) { 1119 case RTM_IFINFO: 1120 ifm = (struct if_msghdr *)rtm; 1121 (void) printf("if# %d, flags:", ifm->ifm_index); 1122 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1123 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1124 break; 1125 case RTM_NEWADDR: 1126 case RTM_DELADDR: 1127 ifam = (struct ifa_msghdr *)rtm; 1128 (void) printf("metric %d, flags:", ifam->ifam_metric); 1129 bprintf(stdout, ifam->ifam_flags, routeflags); 1130 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1131 break; 1132 default: 1133 (void) printf("pid: %d, seq %d, errno %d, flags:", 1134 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1135 bprintf(stdout, rtm->rtm_flags, routeflags); 1136 pmsg_common(rtm); 1137 } 1138 } 1139 1140 void 1141 print_getmsg(rtm, msglen) 1142 register struct rt_msghdr *rtm; 1143 int msglen; 1144 { 1145 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1146 struct sockaddr_dl *ifp = NULL; 1147 register struct sockaddr *sa; 1148 register char *cp; 1149 register int i; 1150 1151 (void) printf(" route to: %s\n", routename(&so_dst)); 1152 if (rtm->rtm_version != RTM_VERSION) { 1153 (void)fprintf(stderr, 1154 "routing message version %d not understood\n", 1155 rtm->rtm_version); 1156 return; 1157 } 1158 if (rtm->rtm_msglen > msglen) { 1159 (void)fprintf(stderr, 1160 "message length mismatch, in packet %d, returned %d\n", 1161 rtm->rtm_msglen, msglen); 1162 } 1163 if (rtm->rtm_errno) { 1164 (void) fprintf(stderr, "RTM_GET: %s (errno %d)\n", 1165 strerror(rtm->rtm_errno), rtm->rtm_errno); 1166 return; 1167 } 1168 cp = ((char *)(rtm + 1)); 1169 if (rtm->rtm_addrs) 1170 for (i = 1; i; i <<= 1) 1171 if (i & rtm->rtm_addrs) { 1172 sa = (struct sockaddr *)cp; 1173 switch (i) { 1174 case RTA_DST: 1175 dst = sa; 1176 break; 1177 case RTA_GATEWAY: 1178 gate = sa; 1179 break; 1180 case RTA_NETMASK: 1181 mask = sa; 1182 break; 1183 case RTA_IFP: 1184 if (sa->sa_family == AF_LINK && 1185 ((struct sockaddr_dl *)sa)->sdl_nlen) 1186 ifp = (struct sockaddr_dl *)sa; 1187 break; 1188 } 1189 ADVANCE(cp, sa); 1190 } 1191 if (dst && mask) 1192 mask->sa_family = dst->sa_family; /* XXX */ 1193 if (dst) 1194 (void)printf("destination: %s\n", routename(dst)); 1195 if (mask) { 1196 int savenflag = nflag; 1197 1198 nflag = 1; 1199 (void)printf(" mask: %s\n", routename(mask)); 1200 nflag = savenflag; 1201 } 1202 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1203 (void)printf(" gateway: %s\n", routename(gate)); 1204 if (ifp) 1205 (void)printf(" interface: %.*s\n", 1206 ifp->sdl_nlen, ifp->sdl_data); 1207 (void)printf(" flags: "); 1208 bprintf(stdout, rtm->rtm_flags, routeflags); 1209 1210 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1211 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1212 1213 (void) printf("\n%s\n", "\ 1214 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1215 printf("%8d%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1216 printf("%8d%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1217 printf("%8d%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1218 printf("%8d%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1219 printf("%8d%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1220 printf("%8d%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1221 printf("%8d%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1222 if (rtm->rtm_rmx.rmx_expire) 1223 rtm->rtm_rmx.rmx_expire -= time(0); 1224 printf("%8d%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1225 #undef lock 1226 #undef msec 1227 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1228 if (verbose) 1229 pmsg_common(rtm); 1230 else if (rtm->rtm_addrs &~ RTA_IGN) { 1231 (void) printf("sockaddrs: "); 1232 bprintf(stdout, rtm->rtm_addrs, addrnames); 1233 putchar('\n'); 1234 } 1235 #undef RTA_IGN 1236 } 1237 1238 void 1239 pmsg_common(rtm) 1240 register struct rt_msghdr *rtm; 1241 { 1242 (void) printf("\nlocks: "); 1243 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1244 (void) printf(" inits: "); 1245 bprintf(stdout, rtm->rtm_inits, metricnames); 1246 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1247 } 1248 1249 void 1250 pmsg_addrs(cp, addrs) 1251 char *cp; 1252 int addrs; 1253 { 1254 register struct sockaddr *sa; 1255 int i; 1256 1257 if (addrs == 0) 1258 return; 1259 (void) printf("\nsockaddrs: "); 1260 bprintf(stdout, addrs, addrnames); 1261 (void) putchar('\n'); 1262 for (i = 1; i; i <<= 1) 1263 if (i & addrs) { 1264 sa = (struct sockaddr *)cp; 1265 (void) printf(" %s", routename(sa)); 1266 ADVANCE(cp, sa); 1267 } 1268 (void) putchar('\n'); 1269 (void) fflush(stdout); 1270 } 1271 1272 void 1273 bprintf(fp, b, s) 1274 register FILE *fp; 1275 register int b; 1276 register u_char *s; 1277 { 1278 register int i; 1279 int gotsome = 0; 1280 1281 if (b == 0) 1282 return; 1283 while (i = *s++) { 1284 if (b & (1 << (i-1))) { 1285 if (gotsome == 0) 1286 i = '<'; 1287 else 1288 i = ','; 1289 (void) putc(i, fp); 1290 gotsome = 1; 1291 for (; (i = *s) > 32; s++) 1292 (void) putc(i, fp); 1293 } else 1294 while (*s > 32) 1295 s++; 1296 } 1297 if (gotsome) 1298 (void) putc('>', fp); 1299 } 1300 1301 int 1302 keyword(cp) 1303 char *cp; 1304 { 1305 register struct keytab *kt = keywords; 1306 1307 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1308 kt++; 1309 return kt->kt_i; 1310 } 1311 1312 void 1313 sodump(su, which) 1314 register sup su; 1315 char *which; 1316 { 1317 switch (su->sa.sa_family) { 1318 case AF_LINK: 1319 (void) printf("%s: link %s; ", 1320 which, link_ntoa(&su->sdl)); 1321 break; 1322 case AF_ISO: 1323 (void) printf("%s: iso %s; ", 1324 which, iso_ntoa(&su->siso.siso_addr)); 1325 break; 1326 case AF_INET: 1327 (void) printf("%s: inet %s; ", 1328 which, inet_ntoa(su->sin.sin_addr)); 1329 break; 1330 case AF_NS: 1331 (void) printf("%s: xns %s; ", 1332 which, ns_ntoa(su->sns.sns_addr)); 1333 break; 1334 } 1335 (void) fflush(stdout); 1336 } 1337 1338 /* States*/ 1339 #define VIRGIN 0 1340 #define GOTONE 1 1341 #define GOTTWO 2 1342 /* Inputs */ 1343 #define DIGIT (4*0) 1344 #define END (4*1) 1345 #define DELIM (4*2) 1346 1347 void 1348 sockaddr(addr, sa) 1349 register char *addr; 1350 register struct sockaddr *sa; 1351 { 1352 register char *cp = (char *)sa; 1353 int size = sa->sa_len; 1354 char *cplim = cp + size; 1355 register int byte = 0, state = VIRGIN, new; 1356 1357 memset(cp, 0, size); 1358 cp++; 1359 do { 1360 if ((*addr >= '0') && (*addr <= '9')) { 1361 new = *addr - '0'; 1362 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1363 new = *addr - 'a' + 10; 1364 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1365 new = *addr - 'A' + 10; 1366 } else if (*addr == 0) 1367 state |= END; 1368 else 1369 state |= DELIM; 1370 addr++; 1371 switch (state /* | INPUT */) { 1372 case GOTTWO | DIGIT: 1373 *cp++ = byte; /*FALLTHROUGH*/ 1374 case VIRGIN | DIGIT: 1375 state = GOTONE; byte = new; continue; 1376 case GOTONE | DIGIT: 1377 state = GOTTWO; byte = new + (byte << 4); continue; 1378 default: /* | DELIM */ 1379 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1380 case GOTONE | END: 1381 case GOTTWO | END: 1382 *cp++ = byte; /* FALLTHROUGH */ 1383 case VIRGIN | END: 1384 break; 1385 } 1386 break; 1387 } while (cp < cplim); 1388 sa->sa_len = cp - (char *)sa; 1389 } 1390