1 /* 2 * Copyright (c) 1983, 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 char copyright[] = 10 "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ 11 All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)route.c 5.30 (Berkeley) 11/29/90"; 16 #endif /* not lint */ 17 18 #include <sys/param.h> 19 #include <sys/socket.h> 20 #include <sys/ioctl.h> 21 #include <sys/file.h> 22 #include <sys/mbuf.h> 23 #include <sys/kinfo.h> 24 25 #include <net/route.h> 26 #include <net/if_dl.h> 27 #include <netinet/in.h> 28 #include <netns/ns.h> 29 #include <netiso/iso.h> 30 31 #include <netdb.h> 32 #include <stdio.h> 33 #include <errno.h> 34 #include <ctype.h> 35 #include <paths.h> 36 37 struct keytab { 38 char *kt_cp; 39 int kt_i; 40 } keywords[] = { 41 #include "keywords.h" 42 {0, 0} 43 }; 44 45 struct ortentry route; 46 union sockunion { 47 struct sockaddr sa; 48 struct sockaddr_in sin; 49 struct sockaddr_ns sns; 50 struct sockaddr_iso siso; 51 struct sockaddr_dl sdl; 52 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp, *so_addrs[] = 53 { &so_dst, &so_gate, &so_mask, &so_genmask, &so_ifp, &so_ifa, 0}; 54 typedef union sockunion *sup; 55 int pid, rtm_addrs, uid; 56 int s; 57 int forcehost, forcenet, doflush, nflag, af, qflag, Cflag, keyword(); 58 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 59 int locking, lockrest, debugonly; 60 struct sockaddr_in sin = { sizeof(sin), AF_INET }; 61 struct rt_metrics rt_metrics; 62 u_long rtm_inits; 63 struct in_addr inet_makeaddr(); 64 char *malloc(), *routename(), *netname(); 65 extern char *iso_ntoa(), *link_ntoa(); 66 67 usage(cp) 68 char *cp; 69 { 70 fprintf(stderr, 71 "usage: route [ -nqCv ] cmd [[ -<qualifers> ] args ]\n"); 72 if (cp) fprintf(stderr, "(botched keyword: %s)\n", cp); 73 74 exit(1); 75 } 76 77 #define ROUNDUP(a) \ 78 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 79 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 80 81 main(argc, argv) 82 int argc; 83 char *argv[]; 84 { 85 char *argvp; 86 if (argc < 2) 87 usage((char *)0); 88 argc--, argv++; 89 for (; argc > 0 && argv[0][0] == '-'; argc--, argv++) { 90 for (argvp = argv[0]++; *argvp; argvp++) 91 switch (*argv[0]) { 92 case 'n': 93 nflag++; 94 break; 95 case 'q': 96 qflag++; 97 break; 98 case 'C': 99 Cflag++; /* Use old ioctls */ 100 break; 101 case 'v': 102 verbose++; 103 } 104 } 105 pid = getpid(); 106 uid = getuid(); 107 if (Cflag) 108 s = socket(AF_INET, SOCK_RAW, 0); 109 else 110 s = socket(PF_ROUTE, SOCK_RAW, 0); 111 if (s < 0) { 112 perror("route: socket"); 113 exit(1); 114 } 115 if (argc > 0) switch (keyword(*argv)) { 116 case K_GET: 117 uid = 0; 118 /* FALLTHROUGH */ 119 case K_CHANGE: 120 if (Cflag) 121 usage("change or get with -C"); 122 /* FALLTHROUGH */ 123 case K_ADD: 124 case K_DELETE: 125 newroute(argc, argv); 126 case K_MONITOR: 127 monitor(); 128 case K_FLUSH: 129 flushroutes(argc, argv); 130 } 131 usage(*argv); 132 } 133 134 /* 135 * Purge all entries in the routing tables not 136 * associated with network interfaces. 137 */ 138 flushroutes(argc, argv) 139 char *argv[]; 140 { 141 int bufsize, needed, seqno, rlen; 142 char *buf, *next, *lim; 143 register struct rt_msghdr *rtm; 144 145 if (uid) 146 usage("must be root to alter routing table"); 147 shutdown(s, 0); /* Don't want to read back our messages */ 148 if (argc > 1) { 149 argv++; 150 if (argc == 2 && **argv == '-') switch (keyword(1 + *argv)) { 151 case K_INET: af = AF_INET; break; 152 case K_XNS: af = AF_NS; break; 153 case K_LINK: af = AF_LINK; break; 154 case K_ISO: case K_OSI: af = AF_ISO; break; 155 default: goto bad; 156 } else 157 bad: usage(*argv); 158 } 159 if ((needed = getkerninfo(KINFO_RT_DUMP, 0, 0, 0)) < 0) 160 { perror("route-getkerninfo-estimate"); exit(1);} 161 if ((buf = malloc(needed)) == 0) 162 { printf("out of space\n");; exit(1);} 163 if ((rlen = getkerninfo(KINFO_RT_DUMP, buf, &needed, 0)) < 0) 164 { perror("actual retrieval of routing table"); exit(1);} 165 lim = buf + rlen; 166 for (next = buf; next < lim; next += rtm->rtm_msglen) { 167 rtm = (struct rt_msghdr *)next; 168 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 169 continue; 170 if (af) { 171 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 172 if (sa->sa_family != af) 173 continue; 174 } 175 rtm->rtm_type = RTM_DELETE; 176 rtm->rtm_seq = seqno; 177 rlen = write(s, next, rtm->rtm_msglen); 178 if (rlen < (int)rtm->rtm_msglen) { 179 perror("writing to routing socket"); 180 printf("got only %d for rlen\n", rlen); 181 break; 182 } 183 seqno++; 184 if (qflag) 185 continue; 186 if (verbose) { 187 print_rtmsg(rtm, rlen); 188 } else { 189 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 190 printf("%-20.20s ", (rtm->rtm_flags & RTF_HOST) ? 191 routename(sa) : netname(sa)); 192 sa = (struct sockaddr *)(sa->sa_len + (char *)sa); 193 printf("%-20.20s ", routename(sa)); 194 printf("done\n"); 195 } 196 } 197 exit(0); 198 } 199 200 char * 201 routename(sa) 202 struct sockaddr *sa; 203 { 204 register char *cp; 205 static char line[50]; 206 struct hostent *hp; 207 static char domain[MAXHOSTNAMELEN + 1]; 208 static int first = 1; 209 char *index(); 210 char *ns_print(); 211 212 if (first) { 213 first = 0; 214 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 215 (cp = index(domain, '.'))) 216 (void) strcpy(domain, cp + 1); 217 else 218 domain[0] = 0; 219 } 220 switch (sa->sa_family) { 221 222 case AF_INET: 223 { struct in_addr in; 224 in = ((struct sockaddr_in *)sa)->sin_addr; 225 226 cp = 0; 227 if (in.s_addr == INADDR_ANY) 228 cp = "default"; 229 if (cp == 0 && !nflag) { 230 hp = gethostbyaddr(&in, sizeof (struct in_addr), 231 AF_INET); 232 if (hp) { 233 if ((cp = index(hp->h_name, '.')) && 234 !strcmp(cp + 1, domain)) 235 *cp = 0; 236 cp = hp->h_name; 237 } 238 } 239 if (cp) 240 strcpy(line, cp); 241 else { 242 #define C(x) ((x) & 0xff) 243 in.s_addr = ntohl(in.s_addr); 244 (void)sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 245 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 246 } 247 break; 248 } 249 250 case AF_NS: 251 return (ns_print((struct sockaddr_ns *)sa)); 252 253 case AF_LINK: 254 return (link_ntoa((struct sockaddr_dl *)sa)); 255 256 case AF_ISO: 257 (void) sprintf(line, "iso %s", 258 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 259 break; 260 261 default: 262 { u_short *s = (u_short *)sa->sa_data; 263 u_short *slim = s + ((sa->sa_len + 1)>>1); 264 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 265 int n; 266 267 while (s < slim) { 268 n = sprintf(cp, " %x", *s); 269 s++; cp += n; 270 } 271 break; 272 } 273 } 274 return (line); 275 } 276 277 /* 278 * Return the name of the network whose address is given. 279 * The address is assumed to be that of a net or subnet, not a host. 280 */ 281 char * 282 netname(sa) 283 struct sockaddr *sa; 284 { 285 char *cp = 0; 286 static char line[50]; 287 struct netent *np = 0; 288 u_long net, mask; 289 register u_long i; 290 int subnetshift; 291 char *ns_print(); 292 293 switch (sa->sa_family) { 294 295 case AF_INET: 296 { struct in_addr in; 297 in = ((struct sockaddr_in *)sa)->sin_addr; 298 299 i = in.s_addr = ntohl(in.s_addr); 300 if (in.s_addr == 0) 301 cp = "default"; 302 else if (!nflag) { 303 if (IN_CLASSA(i)) { 304 mask = IN_CLASSA_NET; 305 subnetshift = 8; 306 } else if (IN_CLASSB(i)) { 307 mask = IN_CLASSB_NET; 308 subnetshift = 8; 309 } else { 310 mask = IN_CLASSC_NET; 311 subnetshift = 4; 312 } 313 /* 314 * If there are more bits than the standard mask 315 * would suggest, subnets must be in use. 316 * Guess at the subnet mask, assuming reasonable 317 * width subnet fields. 318 */ 319 while (in.s_addr &~ mask) 320 mask = (long)mask >> subnetshift; 321 net = in.s_addr & mask; 322 while ((mask & 1) == 0) 323 mask >>= 1, net >>= 1; 324 np = getnetbyaddr(net, AF_INET); 325 if (np) 326 cp = np->n_name; 327 } 328 if (cp) 329 strcpy(line, cp); 330 else if ((in.s_addr & 0xffffff) == 0) 331 (void)sprintf(line, "%u", C(in.s_addr >> 24)); 332 else if ((in.s_addr & 0xffff) == 0) 333 (void)sprintf(line, "%u.%u", C(in.s_addr >> 24), 334 C(in.s_addr >> 16)); 335 else if ((in.s_addr & 0xff) == 0) 336 (void)sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 337 C(in.s_addr >> 16), C(in.s_addr >> 8)); 338 else 339 (void)sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 340 C(in.s_addr >> 16), C(in.s_addr >> 8), 341 C(in.s_addr)); 342 break; 343 } 344 345 case AF_NS: 346 return (ns_print((struct sockaddr_ns *)sa)); 347 break; 348 349 case AF_LINK: 350 return (link_ntoa((struct sockaddr_dl *)sa)); 351 352 case AF_ISO: 353 (void) sprintf(line, "iso %s", 354 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 355 break; 356 357 default: 358 { u_short *s = (u_short *)sa->sa_data; 359 u_short *slim = s + ((sa->sa_len + 1)>>1); 360 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 361 int n; 362 363 while (s < slim) { 364 n = sprintf(cp, " %x", *s); 365 s++; cp += n; 366 } 367 break; 368 } 369 } 370 return (line); 371 } 372 373 set_metric(value, key) 374 char *value; 375 { 376 int flag = 0; 377 u_long noval, *valp = &noval; 378 379 switch (key) { 380 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 381 caseof(K_MTU, RTV_MTU, rmx_mtu); 382 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 383 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 384 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 385 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 386 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 387 caseof(K_RTT, RTV_RTT, rmx_rtt); 388 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 389 } 390 rtm_inits |= flag; 391 if (lockrest || locking) 392 rt_metrics.rmx_locks |= flag; 393 if (locking) 394 locking = 0; 395 *valp = atoi(value); 396 } 397 398 newroute(argc, argv) 399 int argc; 400 register char **argv; 401 { 402 struct sockaddr_in *sin; 403 char *cmd, *dest, *gateway, *mask; 404 int ishost, metric = 0, ret, attempts, oerrno, flags = 0, next; 405 int key; 406 struct hostent *hp = 0; 407 extern int errno; 408 409 if (uid) 410 usage("must be root to alter routing table"); 411 cmd = argv[0]; 412 if (*cmd != 'g') 413 shutdown(s, 0); /* Don't want to read back our messages */ 414 while (--argc > 0) { 415 if (**(++argv)== '-') { 416 switch(key = keyword(1 + *argv)) { 417 case K_LINK: 418 af = AF_LINK; 419 aflen = sizeof(struct sockaddr_dl); 420 break; 421 case K_OSI: 422 case K_ISO: 423 af = AF_ISO; 424 aflen = sizeof(struct sockaddr_iso); 425 break; 426 case K_INET: 427 af = AF_INET; 428 aflen = sizeof(struct sockaddr_in); 429 break; 430 case K_XNS: 431 af = AF_NS; 432 aflen = sizeof(struct sockaddr_ns); 433 break; 434 case K_IFACE: 435 case K_INTERFACE: 436 iflag++; 437 break; 438 case K_LOCK: 439 locking = 1; 440 break; 441 case K_LOCKREST: 442 lockrest = 1; 443 break; 444 case K_HOST: 445 forcehost++; 446 break; 447 case K_REJECT: 448 flags |= RTF_REJECT; 449 break; 450 case K_CLONING: 451 flags |= RTF_CLONING; 452 break; 453 case K_XRESOLVE: 454 flags |= RTF_XRESOLVE; 455 break; 456 case K_IFA: 457 argc--; 458 (void) getaddr(RTA_IFA, *++argv, 0); 459 break; 460 case K_IFP: 461 argc--; 462 (void) getaddr(RTA_IFP, *++argv, 0); 463 break; 464 case K_GENMASK: 465 argc--; 466 (void) getaddr(RTA_GENMASK, *++argv, 0); 467 break; 468 case K_GATEWAY: 469 argc--; 470 (void) getaddr(RTA_GATEWAY, *++argv, 0); 471 break; 472 case K_DST: 473 argc--; 474 ishost = getaddr(RTA_DST, *++argv, &hp); 475 dest = *argv; 476 break; 477 case K_NETMASK: 478 argc--; 479 (void) getaddr(RTA_NETMASK, *++argv, 0); 480 /* FALLTHROUGH */ 481 case K_NET: 482 forcenet++; 483 break; 484 case K_MTU: 485 case K_HOPCOUNT: 486 case K_EXPIRE: 487 case K_RECVPIPE: 488 case K_SENDPIPE: 489 case K_SSTHRESH: 490 case K_RTT: 491 case K_RTTVAR: 492 argc--; 493 set_metric(*++argv, key); 494 break; 495 default: 496 usage(1+*argv); 497 } 498 } else { 499 if ((rtm_addrs & RTA_DST) == 0) { 500 dest = *argv; 501 ishost = getaddr(RTA_DST, *argv, &hp); 502 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 503 gateway = *argv; 504 (void) getaddr(RTA_GATEWAY, *argv, &hp); 505 } else { 506 int ret = atoi(*argv); 507 if (ret == 0) { 508 printf("%s,%s", "old usage of trailing 0", 509 "assuming route to if\n"); 510 iflag = 1; 511 continue; 512 } else if (ret > 0 && ret < 10) { 513 printf("old usage of trailing digit, "); 514 printf("assuming route via gateway\n"); 515 iflag = 0; 516 continue; 517 } 518 (void) getaddr(RTA_NETMASK, *argv, 0); 519 } 520 } 521 } 522 if (forcehost) 523 ishost = 1; 524 if (forcenet) 525 ishost = 0; 526 flags |= RTF_UP; 527 if (ishost) 528 flags |= RTF_HOST; 529 if (iflag == 0) 530 flags |= RTF_GATEWAY; 531 for (attempts = 1; ; attempts++) { 532 errno = 0; 533 if (Cflag && (af == AF_INET || af == AF_NS)) { 534 route.rt_flags = flags; 535 route.rt_dst = so_dst.sa; 536 route.rt_gateway = so_gate.sa; 537 if ((ret = ioctl(s, *cmd == 'a' ? SIOCADDRT : SIOCDELRT, 538 (caddr_t)&route)) == 0) 539 break; 540 } else { 541 if ((ret = rtmsg(*cmd, flags)) == 0) 542 break; 543 } 544 if (errno != ENETUNREACH && errno != ESRCH) 545 break; 546 if (af == AF_INET && hp && hp->h_addr_list[1]) { 547 hp->h_addr_list++; 548 bcopy(hp->h_addr_list[0], (caddr_t)&so_dst.sin.sin_addr, 549 hp->h_length); 550 } else 551 break; 552 } 553 if (*cmd == 'g') 554 exit(0); 555 oerrno = errno; 556 printf("%s %s %s: gateway %s", cmd, ishost? "host" : "net", 557 dest, gateway); 558 if (attempts > 1 && ret == 0) 559 printf(" (%s)", 560 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 561 if (ret == 0) 562 printf("\n"); 563 else { 564 printf(": "); 565 fflush(stdout); 566 errno = oerrno; 567 error(""); 568 } 569 exit(0); 570 } 571 572 error(cmd) 573 char *cmd; 574 { 575 extern int errno; 576 577 switch(errno) { 578 case ESRCH: 579 printf("not in table\n"); 580 break; 581 case EBUSY: 582 printf("entry in use\n"); 583 break; 584 case ENOBUFS: 585 printf("routing table overflow\n"); 586 break; 587 default: 588 printf("ioctl returns %d\n", errno); 589 perror(cmd); 590 } 591 fflush(stdout); 592 errno = 0; 593 } 594 595 char * 596 savestr(s) 597 char *s; 598 { 599 char *sav; 600 601 sav = malloc(strlen(s) + 1); 602 if (sav == NULL) { 603 fprintf("route: out of memory\n"); 604 exit(1); 605 } 606 strcpy(sav, s); 607 return (sav); 608 } 609 610 inet_makenetandmask(net, sin) 611 u_long net; 612 register struct sockaddr_in *sin; 613 { 614 u_long addr; 615 u_long mask = 0; 616 register char *cp; 617 618 rtm_addrs |= RTA_NETMASK; 619 if (net == 0) 620 mask = addr = 0; 621 else if (net < 128) { 622 addr = net << IN_CLASSA_NSHIFT; 623 mask = IN_CLASSA_NET; 624 } else if (net < 65536) { 625 addr = net << IN_CLASSB_NSHIFT; 626 mask = IN_CLASSB_NET; 627 } else if (net < 16777216L) { 628 addr = net << IN_CLASSC_NSHIFT; 629 mask = IN_CLASSC_NET; 630 } else { 631 addr = net; 632 if ((addr & IN_CLASSA_HOST) == 0) 633 mask = IN_CLASSA_NET; 634 else if ((addr & IN_CLASSB_HOST) == 0) 635 mask = IN_CLASSB_NET; 636 else if ((addr & IN_CLASSC_HOST) == 0) 637 mask = IN_CLASSC_NET; 638 else 639 mask = -1; 640 } 641 sin->sin_addr.s_addr = htonl(addr); 642 sin = &so_mask.sin; 643 sin->sin_addr.s_addr = htonl(mask); 644 sin->sin_len = 0; 645 sin->sin_family = 0; 646 cp = (char *)(1 + &(sin->sin_addr)); 647 while (*--cp == 0 && cp > (char *)sin) 648 ; 649 sin->sin_len = 1 + cp - (char *)sin; 650 } 651 652 /* 653 * Interpret an argument as a network address of some kind, 654 * returning 1 if a host address, 0 if a network address. 655 */ 656 getaddr(which, s, hpp) 657 char *s; 658 struct hostent **hpp; 659 { 660 register sup su; 661 struct ns_addr ns_addr(); 662 struct iso_addr *iso_addr(); 663 struct hostent *hp; 664 struct netent *np; 665 u_long val; 666 667 if (af == 0) { 668 af = AF_INET; 669 aflen = sizeof(struct sockaddr_in); 670 } 671 rtm_addrs |= which; 672 switch (which) { 673 case RTA_DST: su = so_addrs[0]; su->sa.sa_family = af; break; 674 case RTA_GATEWAY: su = so_addrs[1]; su->sa.sa_family = af; break; 675 case RTA_NETMASK: su = so_addrs[2]; break; 676 case RTA_GENMASK: su = so_addrs[3]; break; 677 case RTA_IFP: su = so_addrs[4]; su->sa.sa_family = af; break; 678 case RTA_IFA: su = so_addrs[5]; su->sa.sa_family = af; break; 679 default: usage("Internal Error"); /*NOTREACHED*/ 680 } 681 su->sa.sa_len = aflen; 682 if (strcmp(s, "default") == 0) { 683 switch (which) { 684 case RTA_DST: 685 forcenet++; 686 getaddr(RTA_NETMASK, s, 0); 687 break; 688 case RTA_NETMASK: 689 case RTA_GENMASK: 690 su->sa.sa_len = 0; 691 } 692 return 0; 693 } 694 if (af == AF_NS) 695 goto do_xns; 696 if (af == AF_OSI) 697 goto do_osi; 698 if (af == AF_LINK) 699 goto do_link; 700 if (hpp == 0) hpp = &hp; 701 *hpp = 0; 702 if (((val = inet_addr(s)) != -1) && 703 (which != RTA_DST || forcenet == 0)) { 704 su->sin.sin_addr.s_addr = val; 705 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 706 return (1); 707 else { 708 val = ntohl(val); 709 out: if (which == RTA_DST) 710 inet_makenetandmask(val, &su->sin); 711 return (0); 712 } 713 } 714 val = inet_network(s); 715 if (val != -1) { 716 goto out; 717 } 718 np = getnetbyname(s); 719 if (np) { 720 val = np->n_net; 721 goto out; 722 } 723 hp = gethostbyname(s); 724 if (hp) { 725 *hpp = hp; 726 su->sin.sin_family = hp->h_addrtype; 727 bcopy(hp->h_addr, &su->sin.sin_addr, hp->h_length); 728 return (1); 729 } 730 fprintf(stderr, "%s: bad value\n", s); 731 exit(1); 732 do_xns: 733 if (which == RTA_DST) { 734 extern short ns_bh[3]; 735 struct sockaddr_ns *sms = &(so_mask.sns); 736 bzero((char *)sms, sizeof(*sms)); 737 sms->sns_family = 0; 738 sms->sns_len = 6; 739 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 740 rtm_addrs |= RTA_NETMASK; 741 } 742 su->sns.sns_addr = ns_addr(s); 743 return (!ns_nullhost(su->sns.sns_addr)); 744 do_osi: 745 su->siso.siso_addr = *iso_addr(s); 746 if (which == RTA_NETMASK || which == RTA_GENMASK) { 747 register char *cp = (char *)TSEL(&su->siso); 748 su->siso.siso_nlen = 0; 749 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 750 su->siso.siso_len = 1 + cp - (char *)su; 751 } 752 return (1); 753 do_link: 754 link_addr(s, &su->sdl); 755 return (1); 756 } 757 758 short ns_nullh[] = {0,0,0}; 759 short ns_bh[] = {-1,-1,-1}; 760 761 char * 762 ns_print(sns) 763 struct sockaddr_ns *sns; 764 { 765 struct ns_addr work; 766 union { union ns_net net_e; u_long long_e; } net; 767 u_short port; 768 static char mybuf[50], cport[10], chost[25]; 769 char *host = ""; 770 register char *p; register u_char *q; u_char *q_lim; 771 772 work = sns->sns_addr; 773 port = ntohs(work.x_port); 774 work.x_port = 0; 775 net.net_e = work.x_net; 776 if (ns_nullhost(work) && net.long_e == 0) { 777 if (port ) { 778 (void)sprintf(mybuf, "*.%xH", port); 779 upHex(mybuf); 780 } else 781 (void)sprintf(mybuf, "*.*"); 782 return (mybuf); 783 } 784 785 if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) { 786 host = "any"; 787 } else if (bcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 788 host = "*"; 789 } else { 790 q = work.x_host.c_host; 791 (void)sprintf(chost, "%02x%02x%02x%02x%02x%02xH", 792 q[0], q[1], q[2], q[3], q[4], q[5]); 793 for (p = chost; *p == '0' && p < chost + 12; p++); 794 host = p; 795 } 796 if (port) 797 (void)sprintf(cport, ".%xH", htons(port)); 798 else 799 *cport = 0; 800 801 (void)sprintf(mybuf,"%xH.%s%s", ntohl(net.long_e), host, cport); 802 upHex(mybuf); 803 return(mybuf); 804 } 805 806 upHex(p0) 807 char *p0; 808 { 809 register char *p = p0; 810 for (; *p; p++) switch (*p) { 811 812 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': 813 *p += ('A' - 'a'); 814 } 815 } 816 817 monitor() 818 { 819 int n; 820 char msg[2048]; 821 verbose = 1; 822 for(;;) { 823 n = read(s, msg, 2048); 824 printf("got message of size %d\n", n); 825 print_rtmsg((struct rt_msghdr *)msg); 826 } 827 } 828 829 struct { 830 struct rt_msghdr m_rtm; 831 char m_space[512]; 832 } m_rtmsg; 833 834 rtmsg(cmd, flags) 835 { 836 static int seq; 837 int rlen; 838 extern int errno; 839 register char *cp = m_rtmsg.m_space; 840 register int l; 841 842 #define NEXTADDR(w, u) \ 843 if (rtm_addrs & (w)) {\ 844 l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\ 845 if (verbose) sodump(&(u),"u");\ 846 } 847 848 errno = 0; 849 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 850 if (cmd == 'a') 851 cmd = RTM_ADD; 852 else if (cmd == 'c') 853 cmd = RTM_CHANGE; 854 else if (cmd == 'g') 855 cmd = RTM_GET; 856 else 857 cmd = RTM_DELETE; 858 #define rtm m_rtmsg.m_rtm 859 rtm.rtm_type = cmd; 860 rtm.rtm_flags = flags; 861 rtm.rtm_version = RTM_VERSION; 862 rtm.rtm_seq = ++seq; 863 rtm.rtm_addrs = rtm_addrs; 864 rtm.rtm_rmx = rt_metrics; 865 rtm.rtm_inits = rtm_inits; 866 867 NEXTADDR(RTA_DST, so_dst); 868 NEXTADDR(RTA_GATEWAY, so_gate); 869 NEXTADDR(RTA_NETMASK, so_mask); 870 NEXTADDR(RTA_GENMASK, so_genmask); 871 NEXTADDR(RTA_IFP, so_ifp); 872 NEXTADDR(RTA_IFA, so_ifa); 873 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 874 if (verbose) 875 print_rtmsg(&rtm, l); 876 if (debugonly) 877 return 0; 878 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 879 perror("writing to routing socket"); 880 return (-1); 881 } 882 if (cmd == RTM_GET) { 883 do { 884 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 885 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 886 if (l < 0) 887 perror("reading from routing socket"); 888 else 889 print_getmsg(&rtm, l); 890 } 891 #undef rtm 892 return (0); 893 } 894 895 char *msgtypes[] = { 896 "", 897 "RTM_ADD: Add Route", 898 "RTM_DELETE: Delete Route", 899 "RTM_CHANGE: Change Metrics or flags", 900 "RTM_GET: Report Metrics", 901 "RTM_LOSING: Kernel Suspects Partitioning", 902 "RTM_REDIRECT: Told to use different route", 903 "RTM_MISS: Lookup failed on this address", 904 "RTM_LOCK: fix specified metrics", 905 "RTM_OLDADD: caused by SIOCADDRT", 906 "RTM_OLDDEL: caused by SIOCDELRT", 907 0, }; 908 909 char metricnames[] = 910 "\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 911 char routeflags[] = 912 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE"; 913 914 915 print_rtmsg(rtm, msglen) 916 register struct rt_msghdr *rtm; 917 { 918 if (verbose == 0) 919 return; 920 if (rtm->rtm_version != RTM_VERSION) { 921 printf("routing message version %d not understood\n", 922 rtm->rtm_version); 923 return; 924 } 925 printf("%s\npid: %d, len %d, seq %d, errno %d, flags:", 926 msgtypes[rtm->rtm_type], rtm->rtm_pid, rtm->rtm_msglen, 927 rtm->rtm_seq, rtm->rtm_errno); 928 bprintf(stdout, rtm->rtm_flags, routeflags); 929 pmsg_common(rtm); 930 } 931 932 print_getmsg(rtm, msglen) 933 register struct rt_msghdr *rtm; 934 { 935 if (rtm->rtm_version != RTM_VERSION) { 936 printf("routing message version %d not understood\n", 937 rtm->rtm_version); 938 return; 939 } 940 if (rtm->rtm_msglen > msglen) { 941 printf("get length mismatch, in packet %d, returned %d\n", 942 rtm->rtm_msglen, msglen); 943 } 944 printf("RTM_GET: errno %d, flags:", rtm->rtm_errno); 945 bprintf(stdout, rtm->rtm_flags, routeflags); 946 printf("\nmetric values:\n\n"); 947 #define metric(f, e) printf("\t%s:\t%d\n", "f", rtm->rtm_rmx.e) 948 metric(RTV_RPIPE, rmx_recvpipe); 949 metric(RTV_SPIPE, rmx_sendpipe); 950 metric(RTV_SSTHRESH, rmx_ssthresh); 951 metric(RTV_RTT, rmx_rtt); 952 metric(RTV_RTTVAR, rmx_rttvar); 953 metric(RTV_HOPCOUNT, rmx_hopcount); 954 metric(RTV_MTU, rmx_mtu); 955 metric(RTV_EXPIRE, rmx_expire); 956 #undef metric 957 pmsg_common(rtm); 958 } 959 960 pmsg_common(rtm) 961 register struct rt_msghdr *rtm; 962 { 963 char *cp; 964 register struct sockaddr *sa; 965 int i; 966 967 printf("\nlocks: "); bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 968 printf(" inits: "); bprintf(stdout, rtm->rtm_inits, metricnames); 969 printf("\nsockaddrs: "); 970 bprintf(stdout, rtm->rtm_addrs, 971 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR"); 972 putchar('\n'); 973 cp = ((char *)(rtm + 1)); 974 if (rtm->rtm_addrs) 975 for (i = 1; i; i <<= 1) 976 if (i & rtm->rtm_addrs) { 977 sa = (struct sockaddr *)cp; 978 printf(" %s", routename(sa)); 979 ADVANCE(cp, sa); 980 } 981 putchar('\n'); 982 fflush(stdout); 983 } 984 985 bprintf(fp, b, s) 986 register FILE *fp; 987 register int b; 988 register u_char *s; 989 { 990 register int i; 991 int gotsome = 0; 992 993 if (b == 0) 994 return; 995 while (i = *s++) { 996 if (b & (1 << (i-1))) { 997 if (gotsome == 0) i = '<'; else i = ','; 998 putc(i, fp); 999 gotsome = 1; 1000 for (; (i = *s) > 32; s++) 1001 putc(i, fp); 1002 } else 1003 while (*s > 32) 1004 s++; 1005 } 1006 if (gotsome) 1007 putc('>', fp); 1008 } 1009 int 1010 keyword(cp) 1011 char *cp; 1012 { 1013 register struct keytab *kt = keywords; 1014 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1015 kt++; 1016 return kt->kt_i; 1017 } 1018 1019 sodump(su, which) 1020 register sup su; 1021 char *which; 1022 { 1023 switch (su->sa.sa_family) { 1024 case AF_LINK: 1025 printf("%s: link %s; ", which, link_ntoa(&su->sdl)); 1026 break; 1027 case AF_ISO: 1028 printf("%s: iso %s; ", which, iso_ntoa(&su->siso.siso_addr)); 1029 break; 1030 case AF_INET: 1031 printf("%s: inet %s; ", which, inet_ntoa(su->sin.sin_addr)); 1032 break; 1033 case AF_NS: 1034 printf("%s: xns %s; ", which, ns_ntoa(su->sns.sns_addr)); 1035 break; 1036 } 1037 fflush(stdout); 1038 } 1039