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 5.34 (Berkeley) 04/25/91"; 16 #endif /* not lint */ 17 18 #include <sys/param.h> 19 #include <sys/socket.h> 20 #include <sys/ioctl.h> 21 #include <sys/mbuf.h> 22 #include <sys/kinfo.h> 23 24 #include <net/route.h> 25 #include <net/if_dl.h> 26 #include <netinet/in.h> 27 #include <netns/ns.h> 28 #include <netiso/iso.h> 29 #include <arpa/inet.h> 30 #include <netdb.h> 31 32 #include <errno.h> 33 #include <unistd.h> 34 #include <stdio.h> 35 #include <ctype.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <paths.h> 39 40 struct keytab { 41 char *kt_cp; 42 int kt_i; 43 } keywords[] = { 44 #include "keywords.h" 45 {0, 0} 46 }; 47 48 struct ortentry route; 49 union sockunion { 50 struct sockaddr sa; 51 struct sockaddr_in sin; 52 struct sockaddr_ns sns; 53 struct sockaddr_iso siso; 54 struct sockaddr_dl sdl; 55 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 56 57 union sockunion *so_addrs[] = 58 { &so_dst, &so_gate, &so_mask, &so_genmask, &so_ifp, &so_ifa, 0}; 59 60 typedef union sockunion *sup; 61 int pid, rtm_addrs, uid; 62 int s; 63 int forcehost, forcenet, doflush, nflag, af, qflag, Cflag, keyword(); 64 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 65 int locking, lockrest, debugonly; 66 struct sockaddr_in sin = { sizeof(sin), AF_INET }; 67 struct rt_metrics rt_metrics; 68 u_long rtm_inits; 69 struct in_addr inet_makeaddr(); 70 char *routename(), *netname(); 71 void flushroutes(), newroute(), monitor(); 72 void print_getmsg(), print_rtmsg(), pmsg_common(), sodump(), bprintf(); 73 int getaddr(), rtmsg(); 74 extern char *inet_ntoa(), *iso_ntoa(), *link_ntoa(); 75 76 void 77 usage(cp) 78 char *cp; 79 { 80 if (cp) 81 (void) fprintf(stderr, "route: botched keyword: %s\n", cp); 82 (void) fprintf(stderr, 83 "usage: route [ -Cnqv ] cmd [[ -<qualifers> ] args ]\n"); 84 exit(1); 85 /* NOTREACHED */ 86 } 87 88 void 89 quit(s) 90 char *s; 91 { 92 int sverrno = errno; 93 94 (void) fprintf(stderr, "route: "); 95 if (s) 96 (void) fprintf(stderr, "%s: ", s); 97 (void) fprintf(stderr, "%s\n", strerror(sverrno)); 98 exit(1); 99 /* NOTREACHED */ 100 } 101 102 #define ROUNDUP(a) \ 103 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 104 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 105 106 main(argc, argv) 107 int argc; 108 char **argv; 109 { 110 extern int optind; 111 int ch; 112 char *argvp; 113 114 if (argc < 2) 115 usage((char *)NULL); 116 117 while ((ch = getopt(argc, argv, "Cnqv")) != EOF) 118 switch(ch) { 119 case 'C': 120 Cflag = 1; /* Use old ioctls. */ 121 break; 122 case 'n': 123 nflag = 1; 124 break; 125 case 'q': 126 qflag = 1; 127 break; 128 case 'v': 129 verbose = 1; 130 break; 131 case '?': 132 default: 133 usage(); 134 } 135 argc -= optind; 136 argv += optind; 137 138 pid = getpid(); 139 uid = getuid(); 140 if (Cflag) 141 s = socket(AF_INET, SOCK_RAW, 0); 142 else 143 s = socket(PF_ROUTE, SOCK_RAW, 0); 144 if (s < 0) 145 quit("socket"); 146 if (*argv) 147 switch (keyword(*argv)) { 148 case K_GET: 149 uid = 0; 150 /* FALLTHROUGH */ 151 152 case K_CHANGE: 153 if (Cflag) 154 usage("change or get with -C"); 155 /* FALLTHROUGH */ 156 157 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 int needed, seqno, rlen; 186 char *buf, *next, *lim; 187 register struct rt_msghdr *rtm; 188 189 if (uid) 190 quit("must be root to alter routing table"); 191 shutdown(s, 0); /* Don't want to read back our messages */ 192 if (argc > 1) { 193 argv++; 194 if (argc == 2 && **argv == '-') 195 switch (keyword(*argv + 1)) { 196 case K_INET: 197 af = AF_INET; 198 break; 199 case K_XNS: 200 af = AF_NS; 201 break; 202 case K_LINK: 203 af = AF_LINK; 204 break; 205 case K_ISO: 206 case K_OSI: 207 af = AF_ISO; 208 break; 209 default: 210 goto bad; 211 } else 212 bad: usage(*argv); 213 } 214 if ((needed = getkerninfo(KINFO_RT_DUMP, 0, 0, 0)) < 0) 215 quit("route-getkerninfo-estimate"); 216 if ((buf = malloc(needed)) == NULL) 217 quit("malloc"); 218 if ((rlen = getkerninfo(KINFO_RT_DUMP, buf, &needed, 0)) < 0) 219 quit("actual retrieval of routing table"); 220 lim = buf + rlen; 221 seqno = 0; /* ??? */ 222 for (next = buf; next < lim; next += rtm->rtm_msglen) { 223 rtm = (struct rt_msghdr *)next; 224 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 225 continue; 226 if (af) { 227 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 228 229 if (sa->sa_family != af) 230 continue; 231 } 232 rtm->rtm_type = RTM_DELETE; 233 rtm->rtm_seq = seqno; 234 rlen = write(s, next, rtm->rtm_msglen); 235 if (rlen < (int)rtm->rtm_msglen) { 236 (void) fprintf(stderr, 237 "route: write to routing socket: %s\n", 238 strerror(errno)); 239 (void) printf("got only %d for rlen\n", rlen); 240 break; 241 } 242 seqno++; 243 if (qflag) 244 continue; 245 if (verbose) 246 print_rtmsg(rtm, rlen); 247 else { 248 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 249 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 250 routename(sa) : netname(sa)); 251 sa = (struct sockaddr *)(sa->sa_len + (char *)sa); 252 (void) printf("%-20.20s ", routename(sa)); 253 (void) printf("done\n"); 254 } 255 } 256 } 257 258 char * 259 routename(sa) 260 struct sockaddr *sa; 261 { 262 register char *cp; 263 static char line[50]; 264 struct hostent *hp; 265 static char domain[MAXHOSTNAMELEN + 1]; 266 static int first = 1; 267 char *ns_print(); 268 269 if (first) { 270 first = 0; 271 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 272 (cp = index(domain, '.'))) 273 (void) strcpy(domain, cp + 1); 274 else 275 domain[0] = 0; 276 } 277 switch (sa->sa_family) { 278 279 case AF_INET: 280 { struct in_addr in; 281 in = ((struct sockaddr_in *)sa)->sin_addr; 282 283 cp = 0; 284 if (in.s_addr == INADDR_ANY) 285 cp = "default"; 286 if (cp == 0 && !nflag) { 287 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 288 AF_INET); 289 if (hp) { 290 if ((cp = index(hp->h_name, '.')) && 291 !strcmp(cp + 1, domain)) 292 *cp = 0; 293 cp = hp->h_name; 294 } 295 } 296 if (cp) 297 strcpy(line, cp); 298 else { 299 #define C(x) ((x) & 0xff) 300 in.s_addr = ntohl(in.s_addr); 301 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 302 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 303 } 304 break; 305 } 306 307 case AF_NS: 308 return (ns_print((struct sockaddr_ns *)sa)); 309 310 case AF_LINK: 311 return (link_ntoa((struct sockaddr_dl *)sa)); 312 313 case AF_ISO: 314 (void) sprintf(line, "iso %s", 315 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 316 break; 317 318 default: 319 { u_short *s = (u_short *)sa->sa_data; 320 u_short *slim = s + ((sa->sa_len + 1) >> 1); 321 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 322 323 while (s < slim) 324 cp += sprintf(cp, " %x", *s++); 325 break; 326 } 327 } 328 return (line); 329 } 330 331 /* 332 * Return the name of the network whose address is given. 333 * The address is assumed to be that of a net or subnet, not a host. 334 */ 335 char * 336 netname(sa) 337 struct sockaddr *sa; 338 { 339 char *cp = 0; 340 static char line[50]; 341 struct netent *np = 0; 342 u_long net, mask; 343 register u_long i; 344 int subnetshift; 345 char *ns_print(); 346 347 switch (sa->sa_family) { 348 349 case AF_INET: 350 { struct in_addr in; 351 in = ((struct sockaddr_in *)sa)->sin_addr; 352 353 i = in.s_addr = ntohl(in.s_addr); 354 if (in.s_addr == 0) 355 cp = "default"; 356 else if (!nflag) { 357 if (IN_CLASSA(i)) { 358 mask = IN_CLASSA_NET; 359 subnetshift = 8; 360 } else if (IN_CLASSB(i)) { 361 mask = IN_CLASSB_NET; 362 subnetshift = 8; 363 } else { 364 mask = IN_CLASSC_NET; 365 subnetshift = 4; 366 } 367 /* 368 * If there are more bits than the standard mask 369 * would suggest, subnets must be in use. 370 * Guess at the subnet mask, assuming reasonable 371 * width subnet fields. 372 */ 373 while (in.s_addr &~ mask) 374 mask = (long)mask >> subnetshift; 375 net = in.s_addr & mask; 376 while ((mask & 1) == 0) 377 mask >>= 1, net >>= 1; 378 np = getnetbyaddr(net, AF_INET); 379 if (np) 380 cp = np->n_name; 381 } 382 if (cp) 383 strcpy(line, cp); 384 else if ((in.s_addr & 0xffffff) == 0) 385 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 386 else if ((in.s_addr & 0xffff) == 0) 387 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 388 C(in.s_addr >> 16)); 389 else if ((in.s_addr & 0xff) == 0) 390 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 391 C(in.s_addr >> 16), C(in.s_addr >> 8)); 392 else 393 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 394 C(in.s_addr >> 16), C(in.s_addr >> 8), 395 C(in.s_addr)); 396 break; 397 } 398 399 case AF_NS: 400 return (ns_print((struct sockaddr_ns *)sa)); 401 break; 402 403 case AF_LINK: 404 return (link_ntoa((struct sockaddr_dl *)sa)); 405 406 case AF_ISO: 407 (void) sprintf(line, "iso %s", 408 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 409 break; 410 411 default: 412 { u_short *s = (u_short *)sa->sa_data; 413 u_short *slim = s + ((sa->sa_len + 1)>>1); 414 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 415 416 while (s < slim) 417 cp += sprintf(cp, " %x", *s++); 418 break; 419 } 420 } 421 return (line); 422 } 423 424 void 425 set_metric(value, key) 426 char *value; 427 int key; 428 { 429 int flag = 0; 430 u_long noval, *valp = &noval; 431 432 switch (key) { 433 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 434 caseof(K_MTU, RTV_MTU, rmx_mtu); 435 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 436 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 437 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 438 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 439 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 440 caseof(K_RTT, RTV_RTT, rmx_rtt); 441 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 442 } 443 rtm_inits |= flag; 444 if (lockrest || locking) 445 rt_metrics.rmx_locks |= flag; 446 if (locking) 447 locking = 0; 448 *valp = atoi(value); 449 } 450 451 void 452 newroute(argc, argv) 453 int argc; 454 register char **argv; 455 { 456 char *cmd, *dest = "", *gateway = "", *err; 457 int ishost = 0, ret, attempts, oerrno, flags = 0; 458 int key; 459 struct hostent *hp = 0; 460 461 if (uid) 462 quit("must be root to alter routing table"); 463 cmd = argv[0]; 464 if (*cmd != 'g') 465 shutdown(s, 0); /* Don't want to read back our messages */ 466 while (--argc > 0) { 467 if (**(++argv)== '-') { 468 switch (key = keyword(1 + *argv)) { 469 case K_LINK: 470 af = AF_LINK; 471 aflen = sizeof(struct sockaddr_dl); 472 break; 473 case K_OSI: 474 case K_ISO: 475 af = AF_ISO; 476 aflen = sizeof(struct sockaddr_iso); 477 break; 478 case K_INET: 479 af = AF_INET; 480 aflen = sizeof(struct sockaddr_in); 481 break; 482 case K_XNS: 483 af = AF_NS; 484 aflen = sizeof(struct sockaddr_ns); 485 break; 486 case K_IFACE: 487 case K_INTERFACE: 488 iflag++; 489 break; 490 case K_LOCK: 491 locking = 1; 492 break; 493 case K_LOCKREST: 494 lockrest = 1; 495 break; 496 case K_HOST: 497 forcehost++; 498 break; 499 case K_REJECT: 500 flags |= RTF_REJECT; 501 break; 502 case K_PROTO1: 503 flags |= RTF_PROTO1; 504 break; 505 case K_PROTO2: 506 flags |= RTF_PROTO2; 507 break; 508 case K_CLONING: 509 flags |= RTF_CLONING; 510 break; 511 case K_XRESOLVE: 512 flags |= RTF_XRESOLVE; 513 break; 514 case K_IFA: 515 argc--; 516 (void) getaddr(RTA_IFA, *++argv, 0); 517 break; 518 case K_IFP: 519 argc--; 520 (void) getaddr(RTA_IFP, *++argv, 0); 521 break; 522 case K_GENMASK: 523 argc--; 524 (void) getaddr(RTA_GENMASK, *++argv, 0); 525 break; 526 case K_GATEWAY: 527 argc--; 528 (void) getaddr(RTA_GATEWAY, *++argv, 0); 529 break; 530 case K_DST: 531 argc--; 532 ishost = getaddr(RTA_DST, *++argv, &hp); 533 dest = *argv; 534 break; 535 case K_NETMASK: 536 argc--; 537 (void) getaddr(RTA_NETMASK, *++argv, 0); 538 /* FALLTHROUGH */ 539 case K_NET: 540 forcenet++; 541 break; 542 case K_MTU: 543 case K_HOPCOUNT: 544 case K_EXPIRE: 545 case K_RECVPIPE: 546 case K_SENDPIPE: 547 case K_SSTHRESH: 548 case K_RTT: 549 case K_RTTVAR: 550 argc--; 551 set_metric(*++argv, key); 552 break; 553 default: 554 usage(1+*argv); 555 } 556 } else { 557 if ((rtm_addrs & RTA_DST) == 0) { 558 dest = *argv; 559 ishost = getaddr(RTA_DST, *argv, &hp); 560 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 561 gateway = *argv; 562 (void) getaddr(RTA_GATEWAY, *argv, &hp); 563 } else { 564 int ret = atoi(*argv); 565 if (ret == 0) { 566 printf("%s,%s", "old usage of trailing 0", 567 "assuming route to if\n"); 568 iflag = 1; 569 continue; 570 } else if (ret > 0 && ret < 10) { 571 printf("old usage of trailing digit, "); 572 printf("assuming route via gateway\n"); 573 iflag = 0; 574 continue; 575 } 576 (void) getaddr(RTA_NETMASK, *argv, 0); 577 } 578 } 579 } 580 if (forcehost) 581 ishost = 1; 582 if (forcenet) 583 ishost = 0; 584 flags |= RTF_UP; 585 if (ishost) 586 flags |= RTF_HOST; 587 if (iflag == 0) 588 flags |= RTF_GATEWAY; 589 for (attempts = 1; ; attempts++) { 590 errno = 0; 591 if (Cflag && (af == AF_INET || af == AF_NS)) { 592 route.rt_flags = flags; 593 route.rt_dst = so_dst.sa; 594 route.rt_gateway = so_gate.sa; 595 if ((ret = ioctl(s, *cmd == 'a' ? SIOCADDRT : SIOCDELRT, 596 (caddr_t)&route)) == 0) 597 break; 598 } else { 599 if ((ret = rtmsg(*cmd, flags)) == 0) 600 break; 601 } 602 if (errno != ENETUNREACH && errno != ESRCH) 603 break; 604 if (af == AF_INET && hp && hp->h_addr_list[1]) { 605 hp->h_addr_list++; 606 bcopy(hp->h_addr_list[0], (caddr_t)&so_dst.sin.sin_addr, 607 hp->h_length); 608 } else 609 break; 610 } 611 if (*cmd == 'g') 612 exit(0); 613 oerrno = errno; 614 (void) printf("%s %s %s: gateway %s", cmd, ishost? "host" : "net", 615 dest, gateway); 616 if (attempts > 1 && ret == 0) 617 (void) printf(" (%s)", 618 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 619 if (ret == 0) 620 (void) printf("\n"); 621 else { 622 switch (oerrno) { 623 case ESRCH: 624 err = "not in table"; 625 break; 626 case EBUSY: 627 err = "entry in use"; 628 break; 629 case ENOBUFS: 630 err = "routing table overflow"; 631 break; 632 default: 633 err = strerror(oerrno); 634 break; 635 } 636 (void) printf(": %s\n", err); 637 } 638 } 639 640 void 641 inet_makenetandmask(net, sin) 642 u_long net; 643 register struct sockaddr_in *sin; 644 { 645 u_long addr, mask = 0; 646 register char *cp; 647 648 rtm_addrs |= RTA_NETMASK; 649 if (net == 0) 650 mask = addr = 0; 651 else if (net < 128) { 652 addr = net << IN_CLASSA_NSHIFT; 653 mask = IN_CLASSA_NET; 654 } else if (net < 65536) { 655 addr = net << IN_CLASSB_NSHIFT; 656 mask = IN_CLASSB_NET; 657 } else if (net < 16777216L) { 658 addr = net << IN_CLASSC_NSHIFT; 659 mask = IN_CLASSC_NET; 660 } else { 661 addr = net; 662 if ((addr & IN_CLASSA_HOST) == 0) 663 mask = IN_CLASSA_NET; 664 else if ((addr & IN_CLASSB_HOST) == 0) 665 mask = IN_CLASSB_NET; 666 else if ((addr & IN_CLASSC_HOST) == 0) 667 mask = IN_CLASSC_NET; 668 else 669 mask = -1; 670 } 671 sin->sin_addr.s_addr = htonl(addr); 672 sin = &so_mask.sin; 673 sin->sin_addr.s_addr = htonl(mask); 674 sin->sin_len = 0; 675 sin->sin_family = 0; 676 cp = (char *)(&sin->sin_addr + 1); 677 while (*--cp == 0 && cp > (char *)sin) 678 ; 679 sin->sin_len = 1 + cp - (char *)sin; 680 } 681 682 /* 683 * Interpret an argument as a network address of some kind, 684 * returning 1 if a host address, 0 if a network address. 685 */ 686 int 687 getaddr(which, s, hpp) 688 int which; 689 char *s; 690 struct hostent **hpp; 691 { 692 register sup su; 693 struct ns_addr ns_addr(); 694 struct iso_addr *iso_addr(); 695 struct hostent *hp; 696 struct netent *np; 697 u_long val; 698 699 if (af == 0) { 700 af = AF_INET; 701 aflen = sizeof(struct sockaddr_in); 702 } 703 rtm_addrs |= which; 704 switch (which) { 705 case RTA_DST: su = so_addrs[0]; su->sa.sa_family = af; break; 706 case RTA_GATEWAY: su = so_addrs[1]; su->sa.sa_family = af; break; 707 case RTA_NETMASK: su = so_addrs[2]; break; 708 case RTA_GENMASK: su = so_addrs[3]; break; 709 case RTA_IFP: su = so_addrs[4]; su->sa.sa_family = af; break; 710 case RTA_IFA: su = so_addrs[5]; su->sa.sa_family = af; break; 711 default: usage("Internal Error"); /*NOTREACHED*/ 712 } 713 su->sa.sa_len = aflen; 714 if (strcmp(s, "default") == 0) { 715 switch (which) { 716 case RTA_DST: 717 forcenet++; 718 (void) getaddr(RTA_NETMASK, s, 0); 719 break; 720 case RTA_NETMASK: 721 case RTA_GENMASK: 722 su->sa.sa_len = 0; 723 } 724 return 0; 725 } 726 if (af == AF_NS) 727 goto do_xns; 728 if (af == AF_OSI) 729 goto do_osi; 730 if (af == AF_LINK) 731 goto do_link; 732 if (hpp == NULL) 733 hpp = &hp; 734 *hpp = NULL; 735 if (((val = inet_addr(s)) != -1) && 736 (which != RTA_DST || forcenet == 0)) { 737 su->sin.sin_addr.s_addr = val; 738 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 739 return (1); 740 else { 741 val = ntohl(val); 742 out: if (which == RTA_DST) 743 inet_makenetandmask(val, &su->sin); 744 return (0); 745 } 746 } 747 val = inet_network(s); 748 if (val != -1) { 749 goto out; 750 } 751 np = getnetbyname(s); 752 if (np) { 753 val = np->n_net; 754 goto out; 755 } 756 hp = gethostbyname(s); 757 if (hp) { 758 *hpp = hp; 759 su->sin.sin_family = hp->h_addrtype; 760 bcopy(hp->h_addr, (char *)&su->sin.sin_addr, hp->h_length); 761 return (1); 762 } 763 (void) fprintf(stderr, "%s: bad value\n", s); 764 exit(1); 765 do_xns: 766 if (which == RTA_DST) { 767 extern short ns_bh[3]; 768 struct sockaddr_ns *sms = &(so_mask.sns); 769 bzero((char *)sms, sizeof(*sms)); 770 sms->sns_family = 0; 771 sms->sns_len = 6; 772 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 773 rtm_addrs |= RTA_NETMASK; 774 } 775 su->sns.sns_addr = ns_addr(s); 776 return (!ns_nullhost(su->sns.sns_addr)); 777 do_osi: 778 su->siso.siso_addr = *iso_addr(s); 779 if (which == RTA_NETMASK || which == RTA_GENMASK) { 780 register char *cp = (char *)TSEL(&su->siso); 781 su->siso.siso_nlen = 0; 782 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 783 su->siso.siso_len = 1 + cp - (char *)su; 784 } 785 return (1); 786 do_link: 787 link_addr(s, &su->sdl); 788 return (1); 789 } 790 791 short ns_nullh[] = {0,0,0}; 792 short ns_bh[] = {-1,-1,-1}; 793 794 char * 795 ns_print(sns) 796 struct sockaddr_ns *sns; 797 { 798 struct ns_addr work; 799 union { union ns_net net_e; u_long long_e; } net; 800 u_short port; 801 static char mybuf[50], cport[10], chost[25]; 802 char *host = ""; 803 register char *p; 804 register u_char *q; 805 806 work = sns->sns_addr; 807 port = ntohs(work.x_port); 808 work.x_port = 0; 809 net.net_e = work.x_net; 810 if (ns_nullhost(work) && net.long_e == 0) { 811 if (!port) 812 return ("*.*"); 813 (void) sprintf(mybuf, "*.%XH", port); 814 return (mybuf); 815 } 816 817 if (bcmp((char *)ns_bh, (char *)work.x_host.c_host, 6) == 0) 818 host = "any"; 819 else if (bcmp((char *)ns_nullh, (char *)work.x_host.c_host, 6) == 0) 820 host = "*"; 821 else { 822 q = work.x_host.c_host; 823 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 824 q[0], q[1], q[2], q[3], q[4], q[5]); 825 for (p = chost; *p == '0' && p < chost + 12; p++) 826 /* void */; 827 host = p; 828 } 829 if (port) 830 (void) sprintf(cport, ".%XH", htons(port)); 831 else 832 *cport = 0; 833 834 (void) sprintf(mybuf,"%XH.%s%s", ntohl(net.long_e), host, cport); 835 return (mybuf); 836 } 837 838 void 839 monitor() 840 { 841 int n; 842 char msg[2048]; 843 844 verbose = 1; 845 for(;;) { 846 n = read(s, msg, 2048); 847 (void) printf("got message of size %d\n", n); 848 print_rtmsg((struct rt_msghdr *)msg); 849 } 850 } 851 852 struct { 853 struct rt_msghdr m_rtm; 854 char m_space[512]; 855 } m_rtmsg; 856 857 int 858 rtmsg(cmd, flags) 859 int cmd, flags; 860 { 861 static int seq; 862 int rlen; 863 register char *cp = m_rtmsg.m_space; 864 register int l; 865 866 #define NEXTADDR(w, u) \ 867 if (rtm_addrs & (w)) {\ 868 l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\ 869 if (verbose) sodump(&(u),"u");\ 870 } 871 872 errno = 0; 873 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 874 if (cmd == 'a') 875 cmd = RTM_ADD; 876 else if (cmd == 'c') 877 cmd = RTM_CHANGE; 878 else if (cmd == 'g') 879 cmd = RTM_GET; 880 else 881 cmd = RTM_DELETE; 882 #define rtm m_rtmsg.m_rtm 883 rtm.rtm_type = cmd; 884 rtm.rtm_flags = flags; 885 rtm.rtm_version = RTM_VERSION; 886 rtm.rtm_seq = ++seq; 887 rtm.rtm_addrs = rtm_addrs; 888 rtm.rtm_rmx = rt_metrics; 889 rtm.rtm_inits = rtm_inits; 890 891 NEXTADDR(RTA_DST, so_dst); 892 NEXTADDR(RTA_GATEWAY, so_gate); 893 NEXTADDR(RTA_NETMASK, so_mask); 894 NEXTADDR(RTA_GENMASK, so_genmask); 895 NEXTADDR(RTA_IFP, so_ifp); 896 NEXTADDR(RTA_IFA, so_ifa); 897 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 898 if (verbose) 899 print_rtmsg(&rtm, l); 900 if (debugonly) 901 return 0; 902 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 903 perror("writing to routing socket"); 904 return (-1); 905 } 906 if (cmd == RTM_GET) { 907 do { 908 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 909 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 910 if (l < 0) 911 (void) fprintf(stderr, 912 "route: read from routing socket: %s\n", 913 strerror(errno)); 914 else 915 print_getmsg(&rtm, l); 916 } 917 #undef rtm 918 return (0); 919 } 920 921 char *msgtypes[] = { 922 "", 923 "RTM_ADD: Add Route", 924 "RTM_DELETE: Delete Route", 925 "RTM_CHANGE: Change Metrics or flags", 926 "RTM_GET: Report Metrics", 927 "RTM_LOSING: Kernel Suspects Partitioning", 928 "RTM_REDIRECT: Told to use different route", 929 "RTM_MISS: Lookup failed on this address", 930 "RTM_LOCK: fix specified metrics", 931 "RTM_OLDADD: caused by SIOCADDRT", 932 "RTM_OLDDEL: caused by SIOCDELRT", 933 0, 934 }; 935 936 char metricnames[] = 937 "\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 938 char routeflags[] = 939 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\017PROTO2\020PROTO1"; 940 941 942 void 943 print_rtmsg(rtm, msglen) 944 register struct rt_msghdr *rtm; 945 int msglen; 946 { 947 if (verbose == 0) 948 return; 949 if (rtm->rtm_version != RTM_VERSION) { 950 (void) printf("routing message version %d not understood\n", 951 rtm->rtm_version); 952 return; 953 } 954 (void) printf("%s\npid: %d, len %d, seq %d, errno %d, flags:", 955 msgtypes[rtm->rtm_type], rtm->rtm_pid, rtm->rtm_msglen, 956 rtm->rtm_seq, rtm->rtm_errno); 957 bprintf(stdout, rtm->rtm_flags, routeflags); 958 pmsg_common(rtm); 959 } 960 961 void 962 print_getmsg(rtm, msglen) 963 register struct rt_msghdr *rtm; 964 int msglen; 965 { 966 if (rtm->rtm_version != RTM_VERSION) { 967 (void)printf("routing message version %d not understood\n", 968 rtm->rtm_version); 969 return; 970 } 971 if (rtm->rtm_msglen > msglen) { 972 (void)printf("get length mismatch, in packet %d, returned %d\n", 973 rtm->rtm_msglen, msglen); 974 } 975 (void) printf("RTM_GET: errno %d, flags:", rtm->rtm_errno); 976 bprintf(stdout, rtm->rtm_flags, routeflags); 977 (void) printf("\nmetric values:\n "); 978 #define metric(f, e)\ 979 printf("%s: %d%s", __STRING(f), rtm->rtm_rmx.__CONCAT(rmx_,f), e) 980 metric(recvpipe, ", "); 981 metric(sendpipe, ", "); 982 metric(ssthresh, ", "); 983 metric(rtt, "\n "); 984 metric(rttvar, ", "); 985 metric(hopcount, ", "); 986 metric(mtu, ", "); 987 metric(expire, "\n"); 988 #undef metric 989 pmsg_common(rtm); 990 } 991 992 void 993 pmsg_common(rtm) 994 register struct rt_msghdr *rtm; 995 { 996 char *cp; 997 register struct sockaddr *sa; 998 int i; 999 1000 (void) printf("\nlocks: "); 1001 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1002 (void) printf(" inits: "); 1003 bprintf(stdout, rtm->rtm_inits, metricnames); 1004 (void) printf("\nsockaddrs: "); 1005 bprintf(stdout, rtm->rtm_addrs, 1006 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR"); 1007 (void) putchar('\n'); 1008 cp = ((char *)(rtm + 1)); 1009 if (rtm->rtm_addrs) 1010 for (i = 1; i; i <<= 1) 1011 if (i & rtm->rtm_addrs) { 1012 sa = (struct sockaddr *)cp; 1013 (void) printf(" %s", routename(sa)); 1014 ADVANCE(cp, sa); 1015 } 1016 (void) putchar('\n'); 1017 (void) fflush(stdout); 1018 } 1019 1020 void 1021 bprintf(fp, b, s) 1022 register FILE *fp; 1023 register int b; 1024 register u_char *s; 1025 { 1026 register int i; 1027 int gotsome = 0; 1028 1029 if (b == 0) 1030 return; 1031 while (i = *s++) { 1032 if (b & (1 << (i-1))) { 1033 if (gotsome == 0) 1034 i = '<'; 1035 else 1036 i = ','; 1037 (void) putc(i, fp); 1038 gotsome = 1; 1039 for (; (i = *s) > 32; s++) 1040 (void) putc(i, fp); 1041 } else 1042 while (*s > 32) 1043 s++; 1044 } 1045 if (gotsome) 1046 (void) putc('>', fp); 1047 } 1048 1049 int 1050 keyword(cp) 1051 char *cp; 1052 { 1053 register struct keytab *kt = keywords; 1054 1055 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1056 kt++; 1057 return kt->kt_i; 1058 } 1059 1060 void 1061 sodump(su, which) 1062 register sup su; 1063 char *which; 1064 { 1065 switch (su->sa.sa_family) { 1066 case AF_LINK: 1067 (void) printf("%s: link %s; ", 1068 which, link_ntoa(&su->sdl)); 1069 break; 1070 case AF_ISO: 1071 (void) printf("%s: iso %s; ", 1072 which, iso_ntoa(&su->siso.siso_addr)); 1073 break; 1074 case AF_INET: 1075 (void) printf("%s: inet %s; ", 1076 which, inet_ntoa(su->sin.sin_addr)); 1077 break; 1078 case AF_NS: 1079 (void) printf("%s: xns %s; ", 1080 which, ns_ntoa(su->sns.sns_addr)); 1081 break; 1082 } 1083 (void) fflush(stdout); 1084 } 1085