route.c revision 1.17
1 /* $NetBSD: route.c,v 1.17 1996/11/15 18:01:40 gwr Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)route.c 8.3 (Berkeley) 3/19/94"; 45 #else 46 static char rcsid[] = "$NetBSD: route.c,v 1.17 1996/11/15 18:01:40 gwr Exp $"; 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/file.h> 52 #include <sys/socket.h> 53 #include <sys/ioctl.h> 54 #include <sys/mbuf.h> 55 #include <sys/sysctl.h> 56 57 #include <net/if.h> 58 #include <net/route.h> 59 #include <net/if_dl.h> 60 #include <netinet/in.h> 61 #include <netns/ns.h> 62 #include <netiso/iso.h> 63 #include <netccitt/x25.h> 64 #include <arpa/inet.h> 65 #include <netdb.h> 66 67 #include <errno.h> 68 #include <unistd.h> 69 #include <stdio.h> 70 #include <ctype.h> 71 #include <stdlib.h> 72 #include <string.h> 73 #include <paths.h> 74 75 #include "keywords.h" 76 77 struct ortentry route; 78 union sockunion { 79 struct sockaddr sa; 80 struct sockaddr_in sin; 81 struct sockaddr_ns sns; 82 struct sockaddr_iso siso; 83 struct sockaddr_dl sdl; 84 struct sockaddr_x25 sx25; 85 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 86 87 typedef union sockunion *sup; 88 int pid, rtm_addrs, uid; 89 int s; 90 int forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword(); 91 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 92 int locking, lockrest, debugonly; 93 struct rt_metrics rt_metrics; 94 u_long rtm_inits; 95 struct in_addr inet_makeaddr(); 96 char *routename(), *netname(); 97 void flushroutes(), newroute(), monitor(), sockaddr(), sodump(); 98 void print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(); 99 void bprintf(), mask_addr(); 100 int getaddr(), rtmsg(), x25_makemask(); 101 extern char *inet_ntoa(), *iso_ntoa(), *link_ntoa(); 102 extern void show(); 103 104 __dead void 105 usage(cp) 106 char *cp; 107 { 108 if (cp) 109 (void) fprintf(stderr, "route: botched keyword: %s\n", cp); 110 (void) fprintf(stderr, 111 "usage: route [ -nqv ] cmd [[ -<qualifers> ] args ]\n"); 112 exit(1); 113 /* NOTREACHED */ 114 } 115 116 void 117 quit(s) 118 char *s; 119 { 120 int sverrno = errno; 121 122 (void) fprintf(stderr, "route: "); 123 if (s) 124 (void) fprintf(stderr, "%s: ", s); 125 (void) fprintf(stderr, "%s\n", strerror(sverrno)); 126 exit(1); 127 /* NOTREACHED */ 128 } 129 130 #define ROUNDUP(a) \ 131 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 132 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 133 134 int 135 main(argc, argv) 136 int argc; 137 char **argv; 138 { 139 extern int optind; 140 int ch; 141 142 if (argc < 2) 143 usage((char *)NULL); 144 145 while ((ch = getopt(argc, argv, "nqdtv")) != EOF) 146 switch(ch) { 147 case 'n': 148 nflag = 1; 149 break; 150 case 'q': 151 qflag = 1; 152 break; 153 case 'v': 154 verbose = 1; 155 break; 156 case 't': 157 tflag = 1; 158 break; 159 case 'd': 160 debugonly = 1; 161 break; 162 case '?': 163 default: 164 usage((char *)NULL); 165 } 166 argc -= optind; 167 argv += optind; 168 169 pid = getpid(); 170 uid = getuid(); 171 if (tflag) 172 s = open("/dev/null", O_WRONLY, 0); 173 else 174 s = socket(PF_ROUTE, SOCK_RAW, 0); 175 if (s < 0) 176 quit("socket"); 177 178 if (*argv == NULL) 179 goto no_cmd; 180 switch (keyword(*argv)) { 181 182 #ifndef SMALL 183 case K_GET: 184 uid = 0; 185 /* FALLTHROUGH */ 186 #endif /* SMALL */ 187 188 case K_CHANGE: 189 case K_ADD: 190 case K_DELETE: 191 newroute(argc, argv); 192 break; 193 194 case K_SHOW: 195 uid = 0; 196 show(argc, argv); 197 break; 198 199 #ifndef SMALL 200 case K_MONITOR: 201 monitor(); 202 break; 203 204 case K_FLUSH: 205 flushroutes(argc, argv); 206 break; 207 #endif /* SMALL */ 208 209 no_cmd: 210 default: 211 usage(*argv); 212 return 1; 213 } 214 return 0; 215 } 216 217 #ifndef SMALL 218 /* 219 * Purge all entries in the routing tables not 220 * associated with network interfaces. 221 */ 222 void 223 flushroutes(argc, argv) 224 int argc; 225 char *argv[]; 226 { 227 size_t needed; 228 int mib[6], rlen, seqno; 229 char *buf, *next, *lim; 230 register struct rt_msghdr *rtm; 231 232 if (uid) { 233 errno = EACCES; 234 quit("must be root to alter routing table"); 235 } 236 shutdown(s, 0); /* Don't want to read back our messages */ 237 if (argc > 1) { 238 argv++; 239 if (argc == 2 && **argv == '-') 240 switch (keyword(*argv + 1)) { 241 case K_INET: 242 af = AF_INET; 243 break; 244 case K_XNS: 245 af = AF_NS; 246 break; 247 case K_LINK: 248 af = AF_LINK; 249 break; 250 case K_ISO: 251 case K_OSI: 252 af = AF_ISO; 253 break; 254 case K_X25: 255 af = AF_CCITT; 256 default: 257 goto bad; 258 } else 259 bad: usage(*argv); 260 } 261 mib[0] = CTL_NET; 262 mib[1] = PF_ROUTE; 263 mib[2] = 0; /* protocol */ 264 mib[3] = 0; /* wildcard address family */ 265 mib[4] = NET_RT_DUMP; 266 mib[5] = 0; /* no flags */ 267 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 268 quit("route-sysctl-estimate"); 269 if ((buf = malloc(needed)) == NULL) 270 quit("malloc"); 271 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 272 quit("actual retrieval of routing table"); 273 lim = buf + needed; 274 if (verbose) { 275 (void) printf("Examining routing table from sysctl\n"); 276 if (af) printf("(address family %s)\n", (*argv + 1)); 277 } 278 seqno = 0; /* ??? */ 279 for (next = buf; next < lim; next += rtm->rtm_msglen) { 280 rtm = (struct rt_msghdr *)next; 281 if (verbose) 282 print_rtmsg(rtm, rtm->rtm_msglen); 283 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 284 continue; 285 if (af) { 286 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 287 288 if (sa->sa_family != af) 289 continue; 290 } 291 if (debugonly) 292 continue; 293 rtm->rtm_type = RTM_DELETE; 294 rtm->rtm_seq = seqno; 295 rlen = write(s, next, rtm->rtm_msglen); 296 if (rlen < (int)rtm->rtm_msglen) { 297 (void) fprintf(stderr, 298 "route: write to routing socket: %s\n", 299 strerror(errno)); 300 (void) printf("got only %d for rlen\n", rlen); 301 break; 302 } 303 seqno++; 304 if (qflag) 305 continue; 306 if (verbose) 307 print_rtmsg(rtm, rlen); 308 else { 309 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 310 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 311 routename(sa) : netname(sa)); 312 sa = (struct sockaddr *)(sa->sa_len + (char *)sa); 313 (void) printf("%-20.20s ", routename(sa)); 314 (void) printf("done\n"); 315 } 316 } 317 } 318 #endif /* SMALL */ 319 320 321 static char hexlist[] = "0123456789abcdef"; 322 323 char * 324 any_ntoa(sa) 325 const struct sockaddr *sa; 326 { 327 static char obuf[64]; 328 const char *in; 329 char *out; 330 int len; 331 332 len = sa->sa_len; 333 in = sa->sa_data; 334 out = obuf; 335 336 do { 337 *out++ = hexlist[(*in >> 4) & 15]; 338 *out++ = hexlist[(*in++) & 15]; 339 *out++ = '.'; 340 } while (--len > 0); 341 out[-1] = '\0'; 342 return obuf; 343 } 344 345 346 char * 347 routename(sa) 348 struct sockaddr *sa; 349 { 350 register char *cp; 351 static char line[50]; 352 struct hostent *hp; 353 static char domain[MAXHOSTNAMELEN + 1]; 354 static int first = 1; 355 char *ns_print(); 356 struct in_addr in; 357 358 if (first) { 359 first = 0; 360 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 361 (cp = strchr(domain, '.'))) 362 (void) strcpy(domain, cp + 1); 363 else 364 domain[0] = 0; 365 } 366 367 if (sa->sa_len == 0) 368 strcpy(line, "default"); 369 else switch (sa->sa_family) { 370 371 case AF_INET: 372 in = ((struct sockaddr_in *)sa)->sin_addr; 373 374 cp = 0; 375 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 376 cp = "default"; 377 if (cp == 0 && !nflag) { 378 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 379 AF_INET); 380 if (hp) { 381 if ((cp = strchr(hp->h_name, '.')) && 382 !strcmp(cp + 1, domain)) 383 *cp = 0; 384 cp = hp->h_name; 385 } 386 } 387 if (cp) 388 strcpy(line, cp); 389 else 390 strcpy(line, inet_ntoa(in)); 391 break; 392 393 case AF_LINK: 394 return (link_ntoa((struct sockaddr_dl *)sa)); 395 396 #ifndef SMALL 397 case AF_NS: 398 return (ns_print((struct sockaddr_ns *)sa)); 399 400 case AF_ISO: 401 (void) sprintf(line, "iso %s", 402 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 403 break; 404 #endif /* SMALL */ 405 406 default: 407 (void) sprintf(line, "(%d) %s", 408 sa->sa_family, any_ntoa(sa)); 409 break; 410 411 } 412 return (line); 413 } 414 415 /* 416 * Return the name of the network whose address is given. 417 * The address is assumed to be that of a net or subnet, not a host. 418 */ 419 char * 420 netname(sa) 421 struct sockaddr *sa; 422 { 423 char *cp = 0; 424 static char line[50]; 425 struct netent *np = 0; 426 u_long net, mask; 427 register u_long i; 428 int subnetshift; 429 char *ns_print(); 430 struct in_addr in; 431 432 switch (sa->sa_family) { 433 434 case AF_INET: 435 in = ((struct sockaddr_in *)sa)->sin_addr; 436 i = ntohl(in.s_addr); 437 if (i == 0) 438 cp = "default"; 439 else if (!nflag) { 440 if (IN_CLASSA(i)) { 441 mask = IN_CLASSA_NET; 442 subnetshift = 8; 443 } else if (IN_CLASSB(i)) { 444 mask = IN_CLASSB_NET; 445 subnetshift = 8; 446 } else { 447 mask = IN_CLASSC_NET; 448 subnetshift = 4; 449 } 450 /* 451 * If there are more bits than the standard mask 452 * would suggest, subnets must be in use. 453 * Guess at the subnet mask, assuming reasonable 454 * width subnet fields. 455 */ 456 while (i &~ mask) 457 mask = (long)mask >> subnetshift; 458 net = i & mask; 459 while ((mask & 1) == 0) 460 mask >>= 1, net >>= 1; 461 np = getnetbyaddr(net, AF_INET); 462 if (np) 463 cp = np->n_name; 464 } 465 if (cp) 466 strcpy(line, cp); 467 else { 468 #if 0 /* XXX - This is silly... */ 469 #define C(x) ((x) & 0xff) 470 if ((i & 0xffffff) == 0) 471 (void) sprintf(line, "%u", C(i >> 24)); 472 else if ((i & 0xffff) == 0) 473 (void) sprintf(line, "%u.%u", C(i >> 24), 474 C(i >> 16)); 475 else if ((i & 0xff) == 0) 476 (void) sprintf(line, "%u.%u.%u", C(i >> 24), 477 C(i >> 16), C(i >> 8)); 478 else 479 (void) sprintf(line, "%u.%u.%u.%u", C(i >> 24), 480 C(i >> 16), C(i >> 8), C(i)); 481 #undef C 482 #else /* XXX */ 483 strcpy(line, inet_ntoa(in)); 484 #endif /* XXX */ 485 } 486 break; 487 488 case AF_LINK: 489 return (link_ntoa((struct sockaddr_dl *)sa)); 490 491 #ifndef SMALL 492 case AF_NS: 493 return (ns_print((struct sockaddr_ns *)sa)); 494 495 case AF_ISO: 496 (void) sprintf(line, "iso %s", 497 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 498 break; 499 #endif /* SMALL */ 500 501 default: 502 (void) sprintf(line, "af %d: %s", 503 sa->sa_family, any_ntoa(sa)); 504 break; 505 } 506 return (line); 507 } 508 509 void 510 set_metric(value, key) 511 char *value; 512 int key; 513 { 514 int flag = 0; 515 u_long noval, *valp = &noval; 516 517 switch (key) { 518 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 519 caseof(K_MTU, RTV_MTU, rmx_mtu); 520 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 521 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 522 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 523 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 524 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 525 caseof(K_RTT, RTV_RTT, rmx_rtt); 526 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 527 } 528 rtm_inits |= flag; 529 if (lockrest || locking) 530 rt_metrics.rmx_locks |= flag; 531 if (locking) 532 locking = 0; 533 *valp = atoi(value); 534 } 535 536 void 537 newroute(argc, argv) 538 int argc; 539 register char **argv; 540 { 541 char *cmd, *dest = "", *gateway = "", *err; 542 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 543 int key; 544 struct hostent *hp = 0; 545 546 if (uid) { 547 errno = EACCES; 548 quit("must be root to alter routing table"); 549 } 550 cmd = argv[0]; 551 if (*cmd != 'g') 552 shutdown(s, 0); /* Don't want to read back our messages */ 553 while (--argc > 0) { 554 if (**(++argv)== '-') { 555 switch (key = keyword(1 + *argv)) { 556 557 case K_SA: 558 af = PF_ROUTE; 559 aflen = sizeof(union sockunion); 560 break; 561 562 case K_INET: 563 af = AF_INET; 564 aflen = sizeof(struct sockaddr_in); 565 break; 566 567 case K_LINK: 568 af = AF_LINK; 569 aflen = sizeof(struct sockaddr_dl); 570 break; 571 572 case K_OSI: 573 case K_ISO: 574 af = AF_ISO; 575 aflen = sizeof(struct sockaddr_iso); 576 break; 577 578 case K_X25: 579 af = AF_CCITT; 580 aflen = sizeof(struct sockaddr_x25); 581 break; 582 583 case K_XNS: 584 af = AF_NS; 585 aflen = sizeof(struct sockaddr_ns); 586 break; 587 588 case K_IFACE: 589 case K_INTERFACE: 590 iflag++; 591 break; 592 case K_NOSTATIC: 593 flags &= ~RTF_STATIC; 594 break; 595 case K_LLINFO: 596 flags |= RTF_LLINFO; 597 break; 598 case K_LOCK: 599 locking = 1; 600 break; 601 case K_LOCKREST: 602 lockrest = 1; 603 break; 604 case K_HOST: 605 forcehost++; 606 break; 607 case K_REJECT: 608 flags |= RTF_REJECT; 609 break; 610 case K_BLACKHOLE: 611 flags |= RTF_BLACKHOLE; 612 break; 613 case K_PROTO1: 614 flags |= RTF_PROTO1; 615 break; 616 case K_PROTO2: 617 flags |= RTF_PROTO2; 618 break; 619 case K_CLONING: 620 flags |= RTF_CLONING; 621 break; 622 case K_XRESOLVE: 623 flags |= RTF_XRESOLVE; 624 break; 625 case K_STATIC: 626 flags |= RTF_STATIC; 627 break; 628 case K_IFA: 629 argc--; 630 (void) getaddr(RTA_IFA, *++argv, 0); 631 break; 632 case K_IFP: 633 argc--; 634 (void) getaddr(RTA_IFP, *++argv, 0); 635 break; 636 case K_GENMASK: 637 argc--; 638 (void) getaddr(RTA_GENMASK, *++argv, 0); 639 break; 640 case K_GATEWAY: 641 argc--; 642 (void) getaddr(RTA_GATEWAY, *++argv, 0); 643 break; 644 case K_DST: 645 argc--; 646 ishost = getaddr(RTA_DST, *++argv, &hp); 647 dest = *argv; 648 break; 649 case K_NETMASK: 650 argc--; 651 (void) getaddr(RTA_NETMASK, *++argv, 0); 652 /* FALLTHROUGH */ 653 case K_NET: 654 forcenet++; 655 break; 656 case K_MTU: 657 case K_HOPCOUNT: 658 case K_EXPIRE: 659 case K_RECVPIPE: 660 case K_SENDPIPE: 661 case K_SSTHRESH: 662 case K_RTT: 663 case K_RTTVAR: 664 argc--; 665 set_metric(*++argv, key); 666 break; 667 default: 668 usage(1+*argv); 669 } 670 } else { 671 if ((rtm_addrs & RTA_DST) == 0) { 672 dest = *argv; 673 ishost = getaddr(RTA_DST, *argv, &hp); 674 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 675 gateway = *argv; 676 (void) getaddr(RTA_GATEWAY, *argv, &hp); 677 } else { 678 int ret = atoi(*argv); 679 680 if (ret == 0) { 681 if (!qflag && strcmp(*argv, "0") == 0) 682 printf("%s,%s", 683 "old usage of trailing 0", 684 "assuming route to if\n"); 685 else 686 usage((char *)NULL); 687 iflag = 1; 688 continue; 689 } else if (ret > 0 && ret < 10) { 690 if (!qflag) { 691 printf("old usage of trailing digit, "); 692 printf("assuming route via gateway\n"); 693 } 694 iflag = 0; 695 continue; 696 } 697 (void) getaddr(RTA_NETMASK, *argv, 0); 698 } 699 } 700 } 701 if (forcehost) 702 ishost = 1; 703 if (forcenet) 704 ishost = 0; 705 flags |= RTF_UP; 706 if (ishost) 707 flags |= RTF_HOST; 708 if (iflag == 0) 709 flags |= RTF_GATEWAY; 710 for (attempts = 1; ; attempts++) { 711 errno = 0; 712 if ((ret = rtmsg(*cmd, flags)) == 0) 713 break; 714 if (errno != ENETUNREACH && errno != ESRCH) 715 break; 716 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 717 hp->h_addr_list++; 718 memcpy(&so_gate.sin.sin_addr, hp->h_addr_list[0], 719 hp->h_length); 720 } else 721 break; 722 } 723 if (*cmd == 'g') 724 exit(0); 725 oerrno = errno; 726 if (!qflag) { 727 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 728 if (*gateway) { 729 (void) printf(": gateway %s", gateway); 730 if (attempts > 1 && ret == 0 && af == AF_INET) 731 (void) printf(" (%s)", 732 inet_ntoa(((struct sockaddr_in *) 733 &route.rt_gateway)->sin_addr)); 734 } 735 if (ret == 0) 736 (void) printf("\n"); 737 } 738 if (ret != 0) { 739 switch (oerrno) { 740 case ESRCH: 741 err = "not in table"; 742 break; 743 case EBUSY: 744 err = "entry in use"; 745 break; 746 case ENOBUFS: 747 err = "routing table overflow"; 748 break; 749 default: 750 err = strerror(oerrno); 751 break; 752 } 753 (void) printf(": %s\n", err); 754 } 755 } 756 757 void 758 inet_makenetandmask(net, sin) 759 u_long net; 760 register struct sockaddr_in *sin; 761 { 762 u_long addr, mask = 0; 763 register char *cp; 764 765 rtm_addrs |= RTA_NETMASK; 766 if (net == 0) 767 mask = addr = 0; 768 else if (net < 128) { 769 addr = net << IN_CLASSA_NSHIFT; 770 mask = IN_CLASSA_NET; 771 } else if (net < 65536) { 772 addr = net << IN_CLASSB_NSHIFT; 773 mask = IN_CLASSB_NET; 774 } else if (net < 16777216L) { 775 addr = net << IN_CLASSC_NSHIFT; 776 mask = IN_CLASSC_NET; 777 } else { 778 addr = net; 779 if ((addr & IN_CLASSA_HOST) == 0) 780 mask = IN_CLASSA_NET; 781 else if ((addr & IN_CLASSB_HOST) == 0) 782 mask = IN_CLASSB_NET; 783 else if ((addr & IN_CLASSC_HOST) == 0) 784 mask = IN_CLASSC_NET; 785 else 786 mask = -1; 787 } 788 sin->sin_addr.s_addr = htonl(addr); 789 sin = &so_mask.sin; 790 sin->sin_addr.s_addr = htonl(mask); 791 sin->sin_len = 0; 792 sin->sin_family = 0; 793 cp = (char *)(&sin->sin_addr + 1); 794 while (*--cp == 0 && cp > (char *)sin) 795 ; 796 sin->sin_len = 1 + cp - (char *)sin; 797 } 798 799 /* 800 * Interpret an argument as a network address of some kind, 801 * returning 1 if a host address, 0 if a network address. 802 */ 803 int 804 getaddr(which, s, hpp) 805 int which; 806 char *s; 807 struct hostent **hpp; 808 { 809 register sup su; 810 struct ns_addr ns_addr(); 811 struct iso_addr *iso_addr(); 812 struct hostent *hp; 813 struct netent *np; 814 u_long val; 815 816 if (af == 0) { 817 af = AF_INET; 818 aflen = sizeof(struct sockaddr_in); 819 } 820 rtm_addrs |= which; 821 switch (which) { 822 case RTA_DST: 823 su = &so_dst; 824 su->sa.sa_family = af; 825 break; 826 case RTA_GATEWAY: 827 su = &so_gate; 828 su->sa.sa_family = af; 829 break; 830 case RTA_NETMASK: 831 su = &so_mask; 832 break; 833 case RTA_GENMASK: 834 su = &so_genmask; 835 break; 836 case RTA_IFP: 837 su = &so_ifp; 838 su->sa.sa_family = af; 839 break; 840 case RTA_IFA: 841 su = &so_ifa; 842 su->sa.sa_family = af; 843 break; 844 default: 845 usage("Internal Error"); 846 /*NOTREACHED*/ 847 } 848 su->sa.sa_len = aflen; 849 if (strcmp(s, "default") == 0) { 850 switch (which) { 851 case RTA_DST: 852 forcenet++; 853 (void) getaddr(RTA_NETMASK, s, 0); 854 break; 855 case RTA_NETMASK: 856 case RTA_GENMASK: 857 su->sa.sa_len = 0; 858 } 859 return (0); 860 } 861 switch (af) { 862 #ifndef SMALL 863 case AF_NS: 864 if (which == RTA_DST) { 865 extern short ns_bh[3]; 866 struct sockaddr_ns *sms = &(so_mask.sns); 867 memset(sms, 0, sizeof(*sms)); 868 sms->sns_family = 0; 869 sms->sns_len = 6; 870 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 871 rtm_addrs |= RTA_NETMASK; 872 } 873 su->sns.sns_addr = ns_addr(s); 874 return (!ns_nullhost(su->sns.sns_addr)); 875 876 case AF_OSI: 877 su->siso.siso_addr = *iso_addr(s); 878 if (which == RTA_NETMASK || which == RTA_GENMASK) { 879 register char *cp = (char *)TSEL(&su->siso); 880 su->siso.siso_nlen = 0; 881 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 882 su->siso.siso_len = 1 + cp - (char *)su; 883 } 884 return (1); 885 886 case AF_CCITT: 887 ccitt_addr(s, &su->sx25); 888 return (which == RTA_DST ? x25_makemask() : 1); 889 #endif /* SMALL */ 890 891 case PF_ROUTE: 892 su->sa.sa_len = sizeof(*su); 893 sockaddr(s, &su->sa); 894 return (1); 895 896 case AF_LINK: 897 link_addr(s, &su->sdl); 898 return (1); 899 900 case AF_INET: 901 default: 902 break; 903 } 904 905 if (hpp == NULL) 906 hpp = &hp; 907 *hpp = NULL; 908 if (((val = inet_addr(s)) != INADDR_NONE) && 909 (which != RTA_DST || forcenet == 0)) { 910 su->sin.sin_addr.s_addr = val; 911 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 912 return (1); 913 else { 914 val = ntohl(val); 915 goto netdone; 916 } 917 } 918 if ((val = inet_network(s)) != INADDR_NONE || 919 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 920 netdone: 921 if (which == RTA_DST) 922 inet_makenetandmask(val, &su->sin); 923 return (0); 924 } 925 hp = gethostbyname(s); 926 if (hp) { 927 *hpp = hp; 928 su->sin.sin_family = hp->h_addrtype; 929 memcpy(&su->sin.sin_addr, hp->h_addr, hp->h_length); 930 return (1); 931 } 932 (void) fprintf(stderr, "%s: bad value\n", s); 933 exit(1); 934 } 935 936 #ifndef SMALL 937 int 938 x25_makemask() 939 { 940 register char *cp; 941 942 if ((rtm_addrs & RTA_NETMASK) == 0) { 943 rtm_addrs |= RTA_NETMASK; 944 for (cp = (char *)&so_mask.sx25.x25_net; 945 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 946 *cp = -1; 947 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 948 } 949 return 0; 950 } 951 952 short ns_nullh[] = {0,0,0}; 953 short ns_bh[] = {-1,-1,-1}; 954 955 char * 956 ns_print(sns) 957 struct sockaddr_ns *sns; 958 { 959 struct ns_addr work; 960 union { union ns_net net_e; u_long long_e; } net; 961 u_short port; 962 static char mybuf[50], cport[10], chost[25]; 963 char *host = ""; 964 register char *p; 965 register u_char *q; 966 967 work = sns->sns_addr; 968 port = ntohs(work.x_port); 969 work.x_port = 0; 970 net.net_e = work.x_net; 971 if (ns_nullhost(work) && net.long_e == 0) { 972 if (!port) 973 return ("*.*"); 974 (void) sprintf(mybuf, "*.%XH", port); 975 return (mybuf); 976 } 977 978 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 979 host = "any"; 980 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 981 host = "*"; 982 else { 983 q = work.x_host.c_host; 984 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 985 q[0], q[1], q[2], q[3], q[4], q[5]); 986 for (p = chost; *p == '0' && p < chost + 12; p++) 987 /* void */; 988 host = p; 989 } 990 if (port) 991 (void) sprintf(cport, ".%XH", htons(port)); 992 else 993 *cport = 0; 994 995 (void) sprintf(mybuf,"%XH.%s%s", ntohl(net.long_e), host, cport); 996 return (mybuf); 997 } 998 999 void 1000 interfaces() 1001 { 1002 size_t needed; 1003 int mib[6]; 1004 char *buf, *lim, *next; 1005 register struct rt_msghdr *rtm; 1006 1007 mib[0] = CTL_NET; 1008 mib[1] = PF_ROUTE; 1009 mib[2] = 0; /* protocol */ 1010 mib[3] = 0; /* wildcard address family */ 1011 mib[4] = NET_RT_IFLIST; 1012 mib[5] = 0; /* no flags */ 1013 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1014 quit("route-sysctl-estimate"); 1015 if ((buf = malloc(needed)) == NULL) 1016 quit("malloc"); 1017 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1018 quit("actual retrieval of interface table"); 1019 lim = buf + needed; 1020 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1021 rtm = (struct rt_msghdr *)next; 1022 print_rtmsg(rtm, rtm->rtm_msglen); 1023 } 1024 } 1025 1026 void 1027 monitor() 1028 { 1029 int n; 1030 char msg[2048]; 1031 1032 verbose = 1; 1033 if (debugonly) { 1034 interfaces(); 1035 exit(0); 1036 } 1037 for(;;) { 1038 n = read(s, msg, 2048); 1039 (void) printf("got message of size %d\n", n); 1040 print_rtmsg((struct rt_msghdr *)msg, n); 1041 } 1042 } 1043 1044 #endif /* SMALL */ 1045 1046 1047 struct { 1048 struct rt_msghdr m_rtm; 1049 char m_space[512]; 1050 } m_rtmsg; 1051 1052 int 1053 rtmsg(cmd, flags) 1054 int cmd, flags; 1055 { 1056 static int seq; 1057 int rlen; 1058 register char *cp = m_rtmsg.m_space; 1059 register int l; 1060 1061 #define NEXTADDR(w, u) \ 1062 if (rtm_addrs & (w)) {\ 1063 l = ROUNDUP(u.sa.sa_len); memcpy(cp, &(u), l); cp += l;\ 1064 if (verbose) sodump(&(u),"u");\ 1065 } 1066 1067 errno = 0; 1068 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1069 if (cmd == 'a') 1070 cmd = RTM_ADD; 1071 else if (cmd == 'c') 1072 cmd = RTM_CHANGE; 1073 else if (cmd == 'g') { 1074 #ifdef SMALL 1075 return (-1); 1076 #else /* SMALL */ 1077 cmd = RTM_GET; 1078 if (so_ifp.sa.sa_family == 0) { 1079 so_ifp.sa.sa_family = AF_LINK; 1080 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1081 rtm_addrs |= RTA_IFP; 1082 } 1083 #endif /* SMALL */ 1084 } else 1085 cmd = RTM_DELETE; 1086 #define rtm m_rtmsg.m_rtm 1087 rtm.rtm_type = cmd; 1088 rtm.rtm_flags = flags; 1089 rtm.rtm_version = RTM_VERSION; 1090 rtm.rtm_seq = ++seq; 1091 rtm.rtm_addrs = rtm_addrs; 1092 rtm.rtm_rmx = rt_metrics; 1093 rtm.rtm_inits = rtm_inits; 1094 1095 if (rtm_addrs & RTA_NETMASK) 1096 mask_addr(); 1097 NEXTADDR(RTA_DST, so_dst); 1098 NEXTADDR(RTA_GATEWAY, so_gate); 1099 NEXTADDR(RTA_NETMASK, so_mask); 1100 NEXTADDR(RTA_GENMASK, so_genmask); 1101 NEXTADDR(RTA_IFP, so_ifp); 1102 NEXTADDR(RTA_IFA, so_ifa); 1103 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1104 if (verbose) 1105 print_rtmsg(&rtm, l); 1106 if (debugonly) 1107 return (0); 1108 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1109 perror("writing to routing socket"); 1110 return (-1); 1111 } 1112 #ifndef SMALL 1113 if (cmd == RTM_GET) { 1114 do { 1115 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1116 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1117 if (l < 0) 1118 (void) fprintf(stderr, 1119 "route: read from routing socket: %s\n", 1120 strerror(errno)); 1121 else 1122 print_getmsg(&rtm, l); 1123 } 1124 #endif /* SMALL */ 1125 #undef rtm 1126 return (0); 1127 } 1128 1129 void 1130 mask_addr() 1131 { 1132 int olen = so_mask.sa.sa_len; 1133 register char *cp1 = olen + (char *)&so_mask, *cp2; 1134 1135 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1136 if (*--cp1 != 0) { 1137 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1138 break; 1139 } 1140 if ((rtm_addrs & RTA_DST) == 0) 1141 return; 1142 switch (so_dst.sa.sa_family) { 1143 case AF_NS: 1144 case AF_INET: 1145 case AF_CCITT: 1146 case 0: 1147 return; 1148 case AF_ISO: 1149 olen = MIN(so_dst.siso.siso_nlen, 1150 MAX(so_mask.sa.sa_len - 6, 0)); 1151 break; 1152 } 1153 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1154 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1155 while (cp2 > cp1) 1156 *--cp2 = 0; 1157 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1158 while (cp1 > so_dst.sa.sa_data) 1159 *--cp1 &= *--cp2; 1160 switch (so_dst.sa.sa_family) { 1161 case AF_ISO: 1162 so_dst.siso.siso_nlen = olen; 1163 break; 1164 } 1165 } 1166 1167 char *msgtypes[] = { 1168 "", 1169 "RTM_ADD: Add Route", 1170 "RTM_DELETE: Delete Route", 1171 "RTM_CHANGE: Change Metrics or flags", 1172 "RTM_GET: Report Metrics", 1173 "RTM_LOSING: Kernel Suspects Partitioning", 1174 "RTM_REDIRECT: Told to use different route", 1175 "RTM_MISS: Lookup failed on this address", 1176 "RTM_LOCK: fix specified metrics", 1177 "RTM_OLDADD: caused by SIOCADDRT", 1178 "RTM_OLDDEL: caused by SIOCDELRT", 1179 "RTM_RESOLVE: Route created by cloning", 1180 "RTM_NEWADDR: address being added to iface", 1181 "RTM_DELADDR: address being removed from iface", 1182 "RTM_IFINFO: iface status change", 1183 0, 1184 }; 1185 1186 char metricnames[] = 1187 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1188 char routeflags[] = 1189 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\017PROTO2\020PROTO1"; 1190 char ifnetflags[] = 1191 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1192 char addrnames[] = 1193 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1194 1195 void 1196 print_rtmsg(rtm, msglen) 1197 register struct rt_msghdr *rtm; 1198 int msglen; 1199 { 1200 struct if_msghdr *ifm; 1201 struct ifa_msghdr *ifam; 1202 1203 if (verbose == 0) 1204 return; 1205 if (rtm->rtm_version != RTM_VERSION) { 1206 (void) printf("routing message version %d not understood\n", 1207 rtm->rtm_version); 1208 return; 1209 } 1210 (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen); 1211 switch (rtm->rtm_type) { 1212 case RTM_IFINFO: 1213 ifm = (struct if_msghdr *)rtm; 1214 (void) printf("if# %d, flags:", ifm->ifm_index); 1215 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1216 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1217 break; 1218 case RTM_NEWADDR: 1219 case RTM_DELADDR: 1220 ifam = (struct ifa_msghdr *)rtm; 1221 (void) printf("metric %d, flags:", ifam->ifam_metric); 1222 bprintf(stdout, ifam->ifam_flags, routeflags); 1223 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1224 break; 1225 default: 1226 (void) printf("pid: %d, seq %d, errno %d, flags:", 1227 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1228 bprintf(stdout, rtm->rtm_flags, routeflags); 1229 pmsg_common(rtm); 1230 } 1231 } 1232 1233 #ifndef SMALL 1234 void 1235 print_getmsg(rtm, msglen) 1236 register struct rt_msghdr *rtm; 1237 int msglen; 1238 { 1239 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1240 struct sockaddr_dl *ifp = NULL; 1241 register struct sockaddr *sa; 1242 register char *cp; 1243 register int i; 1244 1245 (void) printf(" route to: %s\n", routename(&so_dst)); 1246 if (rtm->rtm_version != RTM_VERSION) { 1247 (void)fprintf(stderr, 1248 "routing message version %d not understood\n", 1249 rtm->rtm_version); 1250 return; 1251 } 1252 if (rtm->rtm_msglen > msglen) { 1253 (void)fprintf(stderr, 1254 "message length mismatch, in packet %d, returned %d\n", 1255 rtm->rtm_msglen, msglen); 1256 } 1257 if (rtm->rtm_errno) { 1258 (void) fprintf(stderr, "RTM_GET: %s (errno %d)\n", 1259 strerror(rtm->rtm_errno), rtm->rtm_errno); 1260 return; 1261 } 1262 cp = ((char *)(rtm + 1)); 1263 if (rtm->rtm_addrs) 1264 for (i = 1; i; i <<= 1) 1265 if (i & rtm->rtm_addrs) { 1266 sa = (struct sockaddr *)cp; 1267 switch (i) { 1268 case RTA_DST: 1269 dst = sa; 1270 break; 1271 case RTA_GATEWAY: 1272 gate = sa; 1273 break; 1274 case RTA_NETMASK: 1275 mask = sa; 1276 break; 1277 case RTA_IFP: 1278 if (sa->sa_family == AF_LINK && 1279 ((struct sockaddr_dl *)sa)->sdl_nlen) 1280 ifp = (struct sockaddr_dl *)sa; 1281 break; 1282 } 1283 ADVANCE(cp, sa); 1284 } 1285 if (dst && mask) 1286 mask->sa_family = dst->sa_family; /* XXX */ 1287 if (dst) 1288 (void)printf("destination: %s\n", routename(dst)); 1289 if (mask) { 1290 int savenflag = nflag; 1291 1292 nflag = 1; 1293 (void)printf(" mask: %s\n", routename(mask)); 1294 nflag = savenflag; 1295 } 1296 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1297 (void)printf(" gateway: %s\n", routename(gate)); 1298 if (ifp) 1299 (void)printf(" interface: %.*s\n", 1300 ifp->sdl_nlen, ifp->sdl_data); 1301 (void)printf(" flags: "); 1302 bprintf(stdout, rtm->rtm_flags, routeflags); 1303 1304 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1305 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1306 1307 (void) printf("\n%s\n", "\ 1308 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1309 printf("%8d%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1310 printf("%8d%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1311 printf("%8d%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1312 printf("%8d%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1313 printf("%8d%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1314 printf("%8d%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1315 printf("%8d%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1316 if (rtm->rtm_rmx.rmx_expire) 1317 rtm->rtm_rmx.rmx_expire -= time(0); 1318 printf("%8d%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1319 #undef lock 1320 #undef msec 1321 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1322 if (verbose) 1323 pmsg_common(rtm); 1324 else if (rtm->rtm_addrs &~ RTA_IGN) { 1325 (void) printf("sockaddrs: "); 1326 bprintf(stdout, rtm->rtm_addrs, addrnames); 1327 putchar('\n'); 1328 } 1329 #undef RTA_IGN 1330 } 1331 #endif /* SMALL */ 1332 1333 void 1334 pmsg_common(rtm) 1335 register struct rt_msghdr *rtm; 1336 { 1337 (void) printf("\nlocks: "); 1338 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1339 (void) printf(" inits: "); 1340 bprintf(stdout, rtm->rtm_inits, metricnames); 1341 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1342 } 1343 1344 void 1345 pmsg_addrs(cp, addrs) 1346 char *cp; 1347 int addrs; 1348 { 1349 register struct sockaddr *sa; 1350 int i; 1351 1352 if (addrs == 0) 1353 return; 1354 (void) printf("\nsockaddrs: "); 1355 bprintf(stdout, addrs, addrnames); 1356 (void) putchar('\n'); 1357 for (i = 1; i; i <<= 1) 1358 if (i & addrs) { 1359 sa = (struct sockaddr *)cp; 1360 (void) printf(" %s", routename(sa)); 1361 ADVANCE(cp, sa); 1362 } 1363 (void) putchar('\n'); 1364 (void) fflush(stdout); 1365 } 1366 1367 void 1368 bprintf(fp, b, s) 1369 register FILE *fp; 1370 register int b; 1371 register u_char *s; 1372 { 1373 register int i; 1374 int gotsome = 0; 1375 1376 if (b == 0) 1377 return; 1378 while (i = *s++) { 1379 if (b & (1 << (i-1))) { 1380 if (gotsome == 0) 1381 i = '<'; 1382 else 1383 i = ','; 1384 (void) putc(i, fp); 1385 gotsome = 1; 1386 for (; (i = *s) > 32; s++) 1387 (void) putc(i, fp); 1388 } else 1389 while (*s > 32) 1390 s++; 1391 } 1392 if (gotsome) 1393 (void) putc('>', fp); 1394 } 1395 1396 int 1397 keyword(cp) 1398 char *cp; 1399 { 1400 register struct keytab *kt = keywords; 1401 1402 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1403 kt++; 1404 return kt->kt_i; 1405 } 1406 1407 void 1408 sodump(su, which) 1409 register sup su; 1410 char *which; 1411 { 1412 switch (su->sa.sa_family) { 1413 case AF_INET: 1414 (void) printf("%s: inet %s; ", 1415 which, inet_ntoa(su->sin.sin_addr)); 1416 break; 1417 case AF_LINK: 1418 (void) printf("%s: link %s; ", 1419 which, link_ntoa(&su->sdl)); 1420 break; 1421 #ifndef SMALL 1422 case AF_ISO: 1423 (void) printf("%s: iso %s; ", 1424 which, iso_ntoa(&su->siso.siso_addr)); 1425 break; 1426 case AF_NS: 1427 (void) printf("%s: xns %s; ", 1428 which, ns_ntoa(su->sns.sns_addr)); 1429 break; 1430 #endif /* SMALL */ 1431 default: 1432 (void) printf("af %d: %s; ", 1433 which, any_ntoa(&su->sa)); 1434 } 1435 (void) fflush(stdout); 1436 } 1437 1438 /* States*/ 1439 #define VIRGIN 0 1440 #define GOTONE 1 1441 #define GOTTWO 2 1442 /* Inputs */ 1443 #define DIGIT (4*0) 1444 #define END (4*1) 1445 #define DELIM (4*2) 1446 1447 void 1448 sockaddr(addr, sa) 1449 register char *addr; 1450 register struct sockaddr *sa; 1451 { 1452 register char *cp = (char *)sa; 1453 int size = sa->sa_len; 1454 char *cplim = cp + size; 1455 register int byte = 0, state = VIRGIN, new; 1456 1457 memset(cp, 0, size); 1458 cp++; 1459 do { 1460 if ((*addr >= '0') && (*addr <= '9')) { 1461 new = *addr - '0'; 1462 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1463 new = *addr - 'a' + 10; 1464 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1465 new = *addr - 'A' + 10; 1466 } else if (*addr == 0) 1467 state |= END; 1468 else 1469 state |= DELIM; 1470 addr++; 1471 switch (state /* | INPUT */) { 1472 case GOTTWO | DIGIT: 1473 *cp++ = byte; /*FALLTHROUGH*/ 1474 case VIRGIN | DIGIT: 1475 state = GOTONE; byte = new; continue; 1476 case GOTONE | DIGIT: 1477 state = GOTTWO; byte = new + (byte << 4); continue; 1478 default: /* | DELIM */ 1479 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1480 case GOTONE | END: 1481 case GOTTWO | END: 1482 *cp++ = byte; /* FALLTHROUGH */ 1483 case VIRGIN | END: 1484 break; 1485 } 1486 break; 1487 } while (cp < cplim); 1488 sa->sa_len = cp - (char *)sa; 1489 } 1490
Indexes created Fri Sep 26 08:10:20 GMT 2025