1 /* 2 * 3 * Copyright (c) 1983, 1989, 1991, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef lint 36 static const char copyright[] = 37 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 /* 43 static char sccsid[] = "@(#)route.c 8.3 (Berkeley) 3/19/94"; 44 */ 45 static const char rcsid[] = 46 "$Id: route.c,v 1.6 1996/02/13 17:30:34 wollman Exp $"; 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/file.h> 51 #include <sys/socket.h> 52 #include <sys/ioctl.h> 53 #include <sys/mbuf.h> 54 #include <sys/sysctl.h> 55 56 #include <net/if.h> 57 #include <net/route.h> 58 #include <net/if_dl.h> 59 #include <netinet/in.h> 60 #ifdef NS 61 #include <netns/ns.h> 62 #endif 63 #ifdef ISO 64 #include <netiso/iso.h> 65 #endif 66 #ifdef CCITT 67 #include <netccitt/x25.h> 68 #endif 69 #include <arpa/inet.h> 70 #include <netdb.h> 71 72 #include <errno.h> 73 #include <unistd.h> 74 #include <stdio.h> 75 #include <ctype.h> 76 #include <stdlib.h> 77 #include <string.h> 78 #include <paths.h> 79 #include <err.h> 80 #include <sysexits.h> 81 82 struct keytab { 83 char *kt_cp; 84 int kt_i; 85 } keywords[] = { 86 #include "keywords.h" 87 {0, 0} 88 }; 89 90 struct ortentry route; 91 union sockunion { 92 struct sockaddr sa; 93 struct sockaddr_in sin; 94 #ifdef NS 95 struct sockaddr_ns sns; 96 #endif 97 #ifdef ISO 98 struct sockaddr_iso siso; 99 #endif 100 struct sockaddr_dl sdl; 101 #ifdef CCITT 102 struct sockaddr_x25 sx25; 103 #endif 104 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 105 106 typedef union sockunion *sup; 107 int pid, rtm_addrs, uid; 108 int s; 109 int forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword(); 110 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 111 int locking, lockrest, debugonly; 112 struct rt_metrics rt_metrics; 113 u_long rtm_inits; 114 struct in_addr inet_makeaddr(); 115 char *routename(), *netname(); 116 void flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf(); 117 void print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr(); 118 int getaddr(), rtmsg(), x25_makemask(); 119 extern char *inet_ntoa(), *iso_ntoa(), *link_ntoa(); 120 #ifdef CCITT 121 extern int ccitt_addr __P((char *, struct sockaddr_x25 *)); 122 #endif 123 124 __dead void usage __P((const char *)) __dead2; 125 126 __dead void 127 usage(cp) 128 const char *cp; 129 { 130 if (cp) 131 warnx("bad keyword: %s", cp); 132 (void) fprintf(stderr, 133 "usage: route [ -nqv ] cmd [[ -<qualifers> ] args ]\n"); 134 exit(EX_USAGE); 135 /* NOTREACHED */ 136 } 137 138 #define ROUNDUP(a) \ 139 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 140 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 141 142 int 143 main(argc, argv) 144 int argc; 145 char **argv; 146 { 147 extern int optind; 148 int ch; 149 150 if (argc < 2) 151 usage((char *)NULL); 152 153 while ((ch = getopt(argc, argv, "nqdtv")) != EOF) 154 switch(ch) { 155 case 'n': 156 nflag = 1; 157 break; 158 case 'q': 159 qflag = 1; 160 break; 161 case 'v': 162 verbose = 1; 163 break; 164 case 't': 165 tflag = 1; 166 break; 167 case 'd': 168 debugonly = 1; 169 break; 170 case '?': 171 default: 172 usage((char *)NULL); 173 } 174 argc -= optind; 175 argv += optind; 176 177 pid = getpid(); 178 uid = getuid(); 179 if (tflag) 180 s = open("/dev/null", O_WRONLY, 0); 181 else 182 s = socket(PF_ROUTE, SOCK_RAW, 0); 183 if (s < 0) 184 err(EX_OSERR, "socket"); 185 if (*argv) 186 switch (keyword(*argv)) { 187 case K_GET: 188 uid = 0; 189 /* FALLTHROUGH */ 190 191 case K_CHANGE: 192 case K_ADD: 193 case K_DELETE: 194 newroute(argc, argv); 195 exit(0); 196 /* NOTREACHED */ 197 198 case K_MONITOR: 199 monitor(); 200 /* NOTREACHED */ 201 202 case K_FLUSH: 203 flushroutes(argc, argv); 204 exit(0); 205 /* NOTREACHED */ 206 } 207 usage(*argv); 208 /* NOTREACHED */ 209 } 210 211 /* 212 * Purge all entries in the routing tables not 213 * associated with network interfaces. 214 */ 215 void 216 flushroutes(argc, argv) 217 int argc; 218 char *argv[]; 219 { 220 size_t needed; 221 int mib[6], rlen, seqno; 222 char *buf, *next, *lim; 223 register struct rt_msghdr *rtm; 224 225 if (uid) { 226 errx(EX_NOPERM, "must be root to alter routing table"); 227 } 228 shutdown(s, 0); /* Don't want to read back our messages */ 229 if (argc > 1) { 230 argv++; 231 if (argc == 2 && **argv == '-') 232 switch (keyword(*argv + 1)) { 233 case K_INET: 234 af = AF_INET; 235 break; 236 #ifdef NS 237 case K_XNS: 238 af = AF_NS; 239 break; 240 #endif 241 case K_LINK: 242 af = AF_LINK; 243 break; 244 #ifdef ISO 245 case K_ISO: 246 case K_OSI: 247 af = AF_ISO; 248 break; 249 #endif 250 #ifdef CCITT 251 case K_X25: 252 af = AF_CCITT; 253 #endif 254 default: 255 goto bad; 256 } else 257 bad: usage(*argv); 258 } 259 mib[0] = CTL_NET; 260 mib[1] = PF_ROUTE; 261 mib[2] = 0; /* protocol */ 262 mib[3] = 0; /* wildcard address family */ 263 mib[4] = NET_RT_DUMP; 264 mib[5] = 0; /* no flags */ 265 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 266 err(EX_OSERR, "route-sysctl-estimate"); 267 if ((buf = malloc(needed)) == NULL) 268 err(EX_OSERR, "malloc"); 269 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 270 err(EX_OSERR, "route-sysctl-get"); 271 lim = buf + needed; 272 if (verbose) 273 (void) printf("Examining routing table from sysctl\n"); 274 seqno = 0; /* ??? */ 275 for (next = buf; next < lim; next += rtm->rtm_msglen) { 276 rtm = (struct rt_msghdr *)next; 277 if (verbose) 278 print_rtmsg(rtm, rtm->rtm_msglen); 279 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 280 continue; 281 if (af) { 282 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 283 284 if (sa->sa_family != af) 285 continue; 286 } 287 if (debugonly) 288 continue; 289 rtm->rtm_type = RTM_DELETE; 290 rtm->rtm_seq = seqno; 291 rlen = write(s, next, rtm->rtm_msglen); 292 if (rlen < (int)rtm->rtm_msglen) { 293 warn("write to routing socket"); 294 (void) printf("got only %d for rlen\n", rlen); 295 break; 296 } 297 seqno++; 298 if (qflag) 299 continue; 300 if (verbose) 301 print_rtmsg(rtm, rlen); 302 else { 303 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 304 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 305 routename(sa) : netname(sa)); 306 sa = (struct sockaddr *)(sa->sa_len + (char *)sa); 307 (void) printf("%-20.20s ", routename(sa)); 308 (void) printf("done\n"); 309 } 310 } 311 } 312 313 char * 314 routename(sa) 315 struct sockaddr *sa; 316 { 317 register char *cp; 318 static char line[50]; 319 struct hostent *hp; 320 static char domain[MAXHOSTNAMELEN + 1]; 321 static int first = 1; 322 #ifdef NS 323 char *ns_print(); 324 #endif 325 326 if (first) { 327 first = 0; 328 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 329 (cp = index(domain, '.'))) 330 (void) strcpy(domain, cp + 1); 331 else 332 domain[0] = 0; 333 } 334 335 if (sa->sa_len == 0) 336 strcpy(line, "default"); 337 else switch (sa->sa_family) { 338 339 case AF_INET: 340 { struct in_addr in; 341 in = ((struct sockaddr_in *)sa)->sin_addr; 342 343 cp = 0; 344 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 345 cp = "default"; 346 if (cp == 0 && !nflag) { 347 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 348 AF_INET); 349 if (hp) { 350 if ((cp = index(hp->h_name, '.')) && 351 !strcmp(cp + 1, domain)) 352 *cp = 0; 353 cp = hp->h_name; 354 } 355 } 356 if (cp) 357 strcpy(line, cp); 358 else { 359 /* XXX - why not inet_ntoa()? */ 360 #define C(x) (unsigned)((x) & 0xff) 361 in.s_addr = ntohl(in.s_addr); 362 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 363 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 364 } 365 break; 366 } 367 368 #ifdef NS 369 case AF_NS: 370 return (ns_print((struct sockaddr_ns *)sa)); 371 #endif 372 373 case AF_LINK: 374 return (link_ntoa((struct sockaddr_dl *)sa)); 375 376 #ifdef ISO 377 case AF_ISO: 378 (void) sprintf(line, "iso %s", 379 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 380 break; 381 #endif 382 default: 383 { u_short *s = (u_short *)sa; 384 u_short *slim = s + ((sa->sa_len + 1) >> 1); 385 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 386 387 while (++s < slim) /* start with sa->sa_data */ 388 cp += sprintf(cp, " %x", *s); 389 break; 390 } 391 } 392 return (line); 393 } 394 395 /* 396 * Return the name of the network whose address is given. 397 * The address is assumed to be that of a net or subnet, not a host. 398 */ 399 char * 400 netname(sa) 401 struct sockaddr *sa; 402 { 403 char *cp = 0; 404 static char line[50]; 405 struct netent *np = 0; 406 u_long net, mask; 407 register u_long i; 408 int subnetshift; 409 #ifdef NS 410 char *ns_print(); 411 #endif 412 413 switch (sa->sa_family) { 414 415 case AF_INET: 416 { struct in_addr in; 417 in = ((struct sockaddr_in *)sa)->sin_addr; 418 419 i = in.s_addr = ntohl(in.s_addr); 420 if (in.s_addr == 0) 421 cp = "default"; 422 else if (!nflag) { 423 if (IN_CLASSA(i)) { 424 mask = IN_CLASSA_NET; 425 subnetshift = 8; 426 } else if (IN_CLASSB(i)) { 427 mask = IN_CLASSB_NET; 428 subnetshift = 8; 429 } else { 430 mask = IN_CLASSC_NET; 431 subnetshift = 4; 432 } 433 /* 434 * If there are more bits than the standard mask 435 * would suggest, subnets must be in use. 436 * Guess at the subnet mask, assuming reasonable 437 * width subnet fields. 438 */ 439 while (in.s_addr &~ mask) 440 mask = (long)mask >> subnetshift; 441 net = in.s_addr & mask; 442 while ((mask & 1) == 0) 443 mask >>= 1, net >>= 1; 444 np = getnetbyaddr(net, AF_INET); 445 if (np) 446 cp = np->n_name; 447 } 448 if (cp) 449 strcpy(line, cp); 450 else if ((in.s_addr & 0xffffff) == 0) 451 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 452 else if ((in.s_addr & 0xffff) == 0) 453 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 454 C(in.s_addr >> 16)); 455 else if ((in.s_addr & 0xff) == 0) 456 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 457 C(in.s_addr >> 16), C(in.s_addr >> 8)); 458 else 459 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 460 C(in.s_addr >> 16), C(in.s_addr >> 8), 461 C(in.s_addr)); 462 break; 463 } 464 465 #ifdef NS 466 case AF_NS: 467 return (ns_print((struct sockaddr_ns *)sa)); 468 break; 469 #endif 470 471 case AF_LINK: 472 return (link_ntoa((struct sockaddr_dl *)sa)); 473 474 #ifdef ISO 475 case AF_ISO: 476 (void) sprintf(line, "iso %s", 477 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 478 break; 479 #endif 480 481 default: 482 { u_short *s = (u_short *)sa->sa_data; 483 u_short *slim = s + ((sa->sa_len + 1)>>1); 484 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 485 486 while (s < slim) 487 cp += sprintf(cp, " %x", *s++); 488 break; 489 } 490 } 491 return (line); 492 } 493 494 void 495 set_metric(value, key) 496 char *value; 497 int key; 498 { 499 int flag = 0; 500 u_long noval, *valp = &noval; 501 502 switch (key) { 503 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 504 caseof(K_MTU, RTV_MTU, rmx_mtu); 505 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 506 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 507 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 508 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 509 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 510 caseof(K_RTT, RTV_RTT, rmx_rtt); 511 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 512 } 513 rtm_inits |= flag; 514 if (lockrest || locking) 515 rt_metrics.rmx_locks |= flag; 516 if (locking) 517 locking = 0; 518 *valp = atoi(value); 519 } 520 521 void 522 newroute(argc, argv) 523 int argc; 524 register char **argv; 525 { 526 char *cmd, *dest = "", *gateway = "", *err; 527 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 528 int key; 529 struct hostent *hp = 0; 530 531 if (uid) { 532 errx(EX_NOPERM, "must be root to alter routing table"); 533 } 534 cmd = argv[0]; 535 if (*cmd != 'g') 536 shutdown(s, 0); /* Don't want to read back our messages */ 537 while (--argc > 0) { 538 if (**(++argv)== '-') { 539 switch (key = keyword(1 + *argv)) { 540 case K_LINK: 541 af = AF_LINK; 542 aflen = sizeof(struct sockaddr_dl); 543 break; 544 #ifdef ISO 545 case K_OSI: 546 case K_ISO: 547 af = AF_ISO; 548 aflen = sizeof(struct sockaddr_iso); 549 break; 550 #endif 551 case K_INET: 552 af = AF_INET; 553 aflen = sizeof(struct sockaddr_in); 554 break; 555 #ifdef CCITT 556 case K_X25: 557 af = AF_CCITT; 558 aflen = sizeof(struct sockaddr_x25); 559 break; 560 #endif 561 case K_SA: 562 af = PF_ROUTE; 563 aflen = sizeof(union sockunion); 564 break; 565 #ifdef NS 566 case K_XNS: 567 af = AF_NS; 568 aflen = sizeof(struct sockaddr_ns); 569 break; 570 #endif 571 case K_IFACE: 572 case K_INTERFACE: 573 iflag++; 574 break; 575 case K_NOSTATIC: 576 flags &= ~RTF_STATIC; 577 break; 578 case K_LOCK: 579 locking = 1; 580 break; 581 case K_LOCKREST: 582 lockrest = 1; 583 break; 584 case K_HOST: 585 forcehost++; 586 break; 587 case K_REJECT: 588 flags |= RTF_REJECT; 589 break; 590 case K_BLACKHOLE: 591 flags |= RTF_BLACKHOLE; 592 break; 593 case K_PROTO1: 594 flags |= RTF_PROTO1; 595 break; 596 case K_PROTO2: 597 flags |= RTF_PROTO2; 598 break; 599 case K_CLONING: 600 flags |= RTF_CLONING; 601 break; 602 case K_XRESOLVE: 603 flags |= RTF_XRESOLVE; 604 break; 605 case K_STATIC: 606 flags |= RTF_STATIC; 607 break; 608 case K_IFA: 609 argc--; 610 (void) getaddr(RTA_IFA, *++argv, 0); 611 break; 612 case K_IFP: 613 argc--; 614 (void) getaddr(RTA_IFP, *++argv, 0); 615 break; 616 case K_GENMASK: 617 argc--; 618 (void) getaddr(RTA_GENMASK, *++argv, 0); 619 break; 620 case K_GATEWAY: 621 argc--; 622 (void) getaddr(RTA_GATEWAY, *++argv, 0); 623 break; 624 case K_DST: 625 argc--; 626 ishost = getaddr(RTA_DST, *++argv, &hp); 627 dest = *argv; 628 break; 629 case K_NETMASK: 630 argc--; 631 (void) getaddr(RTA_NETMASK, *++argv, 0); 632 /* FALLTHROUGH */ 633 case K_NET: 634 forcenet++; 635 break; 636 case K_MTU: 637 case K_HOPCOUNT: 638 case K_EXPIRE: 639 case K_RECVPIPE: 640 case K_SENDPIPE: 641 case K_SSTHRESH: 642 case K_RTT: 643 case K_RTTVAR: 644 argc--; 645 set_metric(*++argv, key); 646 break; 647 default: 648 usage(1+*argv); 649 } 650 } else { 651 if ((rtm_addrs & RTA_DST) == 0) { 652 dest = *argv; 653 ishost = getaddr(RTA_DST, *argv, &hp); 654 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 655 gateway = *argv; 656 (void) getaddr(RTA_GATEWAY, *argv, &hp); 657 } else { 658 #ifdef CRUFT 659 int ret = atoi(*argv); 660 661 if (ret == 0) { 662 if (strcmp(*argv, "0") == 0) 663 printf("%s,%s", 664 "old usage of trailing 0", 665 "assuming route to if\n"); 666 else 667 usage((char *)NULL); 668 iflag = 1; 669 continue; 670 } else if (ret > 0 && ret < 10) { 671 printf("old usage of trailing digit, "); 672 printf("assuming route via gateway\n"); 673 iflag = 0; 674 continue; 675 } 676 #endif 677 (void) getaddr(RTA_NETMASK, *argv, 0); 678 } 679 } 680 } 681 if (forcehost) 682 ishost = 1; 683 if (forcenet) 684 ishost = 0; 685 flags |= RTF_UP; 686 if (ishost) 687 flags |= RTF_HOST; 688 if (iflag == 0) 689 flags |= RTF_GATEWAY; 690 for (attempts = 1; ; attempts++) { 691 errno = 0; 692 if ((ret = rtmsg(*cmd, flags)) == 0) 693 break; 694 if (errno != ENETUNREACH && errno != ESRCH) 695 break; 696 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 697 hp->h_addr_list++; 698 bcopy(hp->h_addr_list[0], &so_gate.sin.sin_addr, 699 hp->h_length); 700 } else 701 break; 702 } 703 if (*cmd == 'g') 704 exit(0); 705 oerrno = errno; 706 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 707 if (*gateway) { 708 (void) printf(": gateway %s", gateway); 709 if (attempts > 1 && ret == 0 && af == AF_INET) 710 (void) printf(" (%s)", 711 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 712 } 713 if (ret == 0) 714 (void) printf("\n"); 715 else { 716 switch (oerrno) { 717 case ESRCH: 718 err = "not in table"; 719 break; 720 case EBUSY: 721 err = "entry in use"; 722 break; 723 case ENOBUFS: 724 err = "routing table overflow"; 725 break; 726 default: 727 err = strerror(oerrno); 728 break; 729 } 730 (void) printf(": %s\n", err); 731 } 732 } 733 734 void 735 inet_makenetandmask(net, sin) 736 u_long net; 737 register struct sockaddr_in *sin; 738 { 739 u_long addr, mask = 0; 740 register char *cp; 741 742 rtm_addrs |= RTA_NETMASK; 743 if (net == 0) 744 mask = addr = 0; 745 else if (net < 128) { 746 addr = net << IN_CLASSA_NSHIFT; 747 mask = IN_CLASSA_NET; 748 } else if (net < 65536) { 749 addr = net << IN_CLASSB_NSHIFT; 750 mask = IN_CLASSB_NET; 751 } else if (net < 16777216L) { 752 addr = net << IN_CLASSC_NSHIFT; 753 mask = IN_CLASSC_NET; 754 } else { 755 addr = net; 756 if ((addr & IN_CLASSA_HOST) == 0) 757 mask = IN_CLASSA_NET; 758 else if ((addr & IN_CLASSB_HOST) == 0) 759 mask = IN_CLASSB_NET; 760 else if ((addr & IN_CLASSC_HOST) == 0) 761 mask = IN_CLASSC_NET; 762 else 763 mask = -1; 764 } 765 sin->sin_addr.s_addr = htonl(addr); 766 sin = &so_mask.sin; 767 sin->sin_addr.s_addr = htonl(mask); 768 sin->sin_len = 0; 769 sin->sin_family = 0; 770 cp = (char *)(&sin->sin_addr + 1); 771 while (*--cp == 0 && cp > (char *)sin) 772 ; 773 sin->sin_len = 1 + cp - (char *)sin; 774 } 775 776 /* 777 * Interpret an argument as a network address of some kind, 778 * returning 1 if a host address, 0 if a network address. 779 */ 780 int 781 getaddr(which, s, hpp) 782 int which; 783 char *s; 784 struct hostent **hpp; 785 { 786 register sup su; 787 #ifdef NS 788 struct ns_addr ns_addr(); 789 #endif 790 #ifdef ISO 791 struct iso_addr *iso_addr(); 792 #endif 793 struct hostent *hp; 794 struct netent *np; 795 u_long val; 796 797 if (af == 0) { 798 af = AF_INET; 799 aflen = sizeof(struct sockaddr_in); 800 } 801 rtm_addrs |= which; 802 switch (which) { 803 case RTA_DST: 804 su = &so_dst; 805 su->sa.sa_family = af; 806 break; 807 case RTA_GATEWAY: 808 su = &so_gate; 809 su->sa.sa_family = af; 810 break; 811 case RTA_NETMASK: 812 su = &so_mask; 813 break; 814 case RTA_GENMASK: 815 su = &so_genmask; 816 break; 817 case RTA_IFP: 818 su = &so_ifp; 819 su->sa.sa_family = af; 820 break; 821 case RTA_IFA: 822 su = &so_ifa; 823 su->sa.sa_family = af; 824 break; 825 default: 826 usage("Internal Error"); 827 /*NOTREACHED*/ 828 } 829 su->sa.sa_len = aflen; 830 if (strcmp(s, "default") == 0) { 831 switch (which) { 832 case RTA_DST: 833 forcenet++; 834 (void) getaddr(RTA_NETMASK, s, 0); 835 break; 836 case RTA_NETMASK: 837 case RTA_GENMASK: 838 su->sa.sa_len = 0; 839 } 840 return (0); 841 } 842 switch (af) { 843 #ifdef NS 844 case AF_NS: 845 if (which == RTA_DST) { 846 extern short ns_bh[3]; 847 struct sockaddr_ns *sms = &(so_mask.sns); 848 bzero((char *)sms, sizeof(*sms)); 849 sms->sns_family = 0; 850 sms->sns_len = 6; 851 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 852 rtm_addrs |= RTA_NETMASK; 853 } 854 su->sns.sns_addr = ns_addr(s); 855 return (!ns_nullhost(su->sns.sns_addr)); 856 #endif 857 858 #ifdef ISO 859 case AF_OSI: 860 su->siso.siso_addr = *iso_addr(s); 861 if (which == RTA_NETMASK || which == RTA_GENMASK) { 862 register char *cp = (char *)TSEL(&su->siso); 863 su->siso.siso_nlen = 0; 864 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 865 su->siso.siso_len = 1 + cp - (char *)su; 866 } 867 return (1); 868 #endif 869 870 case AF_LINK: 871 link_addr(s, &su->sdl); 872 return (1); 873 874 #ifdef ISO 875 case AF_CCITT: 876 ccitt_addr(s, &su->sx25); 877 return (which == RTA_DST ? x25_makemask() : 1); 878 #endif 879 880 case PF_ROUTE: 881 su->sa.sa_len = sizeof(*su); 882 sockaddr(s, &su->sa); 883 return (1); 884 885 case AF_INET: 886 default: 887 break; 888 } 889 890 if (hpp == NULL) 891 hpp = &hp; 892 *hpp = NULL; 893 if (((val = inet_addr(s)) != INADDR_NONE) && 894 (which != RTA_DST || forcenet == 0)) { 895 su->sin.sin_addr.s_addr = val; 896 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 897 return (1); 898 else { 899 val = ntohl(val); 900 goto netdone; 901 } 902 } 903 if ((val = inet_network(s)) != INADDR_NONE || 904 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 905 netdone: 906 if (which == RTA_DST) 907 inet_makenetandmask(val, &su->sin); 908 return (0); 909 } 910 hp = gethostbyname(s); 911 if (hp) { 912 *hpp = hp; 913 su->sin.sin_family = hp->h_addrtype; 914 bcopy(hp->h_addr, (char *)&su->sin.sin_addr, hp->h_length); 915 return (1); 916 } 917 errx(EX_NOHOST, "bad address: %s", s); 918 } 919 920 #ifdef CCITT 921 int 922 x25_makemask() 923 { 924 register char *cp; 925 926 if ((rtm_addrs & RTA_NETMASK) == 0) { 927 rtm_addrs |= RTA_NETMASK; 928 for (cp = (char *)&so_mask.sx25.x25_net; 929 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 930 *cp = -1; 931 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 932 } 933 return 0; 934 } 935 #endif 936 937 #ifdef NS 938 short ns_nullh[] = {0,0,0}; 939 short ns_bh[] = {-1,-1,-1}; 940 941 char * 942 ns_print(sns) 943 struct sockaddr_ns *sns; 944 { 945 struct ns_addr work; 946 union { union ns_net net_e; u_long long_e; } net; 947 u_short port; 948 static char mybuf[50], cport[10], chost[25]; 949 char *host = ""; 950 register char *p; 951 register u_char *q; 952 953 work = sns->sns_addr; 954 port = ntohs(work.x_port); 955 work.x_port = 0; 956 net.net_e = work.x_net; 957 if (ns_nullhost(work) && net.long_e == 0) { 958 if (!port) 959 return ("*.*"); 960 (void) sprintf(mybuf, "*.%XH", port); 961 return (mybuf); 962 } 963 964 if (bcmp((char *)ns_bh, (char *)work.x_host.c_host, 6) == 0) 965 host = "any"; 966 else if (bcmp((char *)ns_nullh, (char *)work.x_host.c_host, 6) == 0) 967 host = "*"; 968 else { 969 q = work.x_host.c_host; 970 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 971 q[0], q[1], q[2], q[3], q[4], q[5]); 972 for (p = chost; *p == '0' && p < chost + 12; p++) 973 /* void */; 974 host = p; 975 } 976 if (port) 977 (void) sprintf(cport, ".%XH", htons(port)); 978 else 979 *cport = 0; 980 981 (void) sprintf(mybuf,"%lxH.%s%s", (unsigned long)ntohl(net.long_e), 982 host, cport); 983 return (mybuf); 984 } 985 #endif 986 987 void 988 interfaces() 989 { 990 size_t needed; 991 int mib[6]; 992 char *buf, *lim, *next; 993 register struct rt_msghdr *rtm; 994 995 mib[0] = CTL_NET; 996 mib[1] = PF_ROUTE; 997 mib[2] = 0; /* protocol */ 998 mib[3] = 0; /* wildcard address family */ 999 mib[4] = NET_RT_IFLIST; 1000 mib[5] = 0; /* no flags */ 1001 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1002 err(EX_OSERR, "route-sysctl-estimate"); 1003 if ((buf = malloc(needed)) == NULL) 1004 err(EX_OSERR, "malloc"); 1005 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1006 err(EX_OSERR, "actual retrieval of interface table"); 1007 lim = buf + needed; 1008 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1009 rtm = (struct rt_msghdr *)next; 1010 print_rtmsg(rtm, rtm->rtm_msglen); 1011 } 1012 } 1013 1014 void 1015 monitor() 1016 { 1017 int n; 1018 char msg[2048]; 1019 1020 verbose = 1; 1021 if (debugonly) { 1022 interfaces(); 1023 exit(0); 1024 } 1025 for(;;) { 1026 n = read(s, msg, 2048); 1027 (void) printf("got message of size %d\n", n); 1028 print_rtmsg((struct rt_msghdr *)msg, n); 1029 } 1030 } 1031 1032 struct { 1033 struct rt_msghdr m_rtm; 1034 char m_space[512]; 1035 } m_rtmsg; 1036 1037 int 1038 rtmsg(cmd, flags) 1039 int cmd, flags; 1040 { 1041 static int seq; 1042 int rlen; 1043 register char *cp = m_rtmsg.m_space; 1044 register int l; 1045 1046 #define NEXTADDR(w, u) \ 1047 if (rtm_addrs & (w)) {\ 1048 l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\ 1049 if (verbose) sodump(&(u),"u");\ 1050 } 1051 1052 errno = 0; 1053 bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); 1054 if (cmd == 'a') 1055 cmd = RTM_ADD; 1056 else if (cmd == 'c') 1057 cmd = RTM_CHANGE; 1058 else if (cmd == 'g') { 1059 cmd = RTM_GET; 1060 if (so_ifp.sa.sa_family == 0) { 1061 so_ifp.sa.sa_family = AF_LINK; 1062 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1063 rtm_addrs |= RTA_IFP; 1064 } 1065 } else 1066 cmd = RTM_DELETE; 1067 #define rtm m_rtmsg.m_rtm 1068 rtm.rtm_type = cmd; 1069 rtm.rtm_flags = flags; 1070 rtm.rtm_version = RTM_VERSION; 1071 rtm.rtm_seq = ++seq; 1072 rtm.rtm_addrs = rtm_addrs; 1073 rtm.rtm_rmx = rt_metrics; 1074 rtm.rtm_inits = rtm_inits; 1075 1076 if (rtm_addrs & RTA_NETMASK) 1077 mask_addr(); 1078 NEXTADDR(RTA_DST, so_dst); 1079 NEXTADDR(RTA_GATEWAY, so_gate); 1080 NEXTADDR(RTA_NETMASK, so_mask); 1081 NEXTADDR(RTA_GENMASK, so_genmask); 1082 NEXTADDR(RTA_IFP, so_ifp); 1083 NEXTADDR(RTA_IFA, so_ifa); 1084 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1085 if (verbose) 1086 print_rtmsg(&rtm, l); 1087 if (debugonly) 1088 return (0); 1089 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1090 perror("writing to routing socket"); 1091 return (-1); 1092 } 1093 if (cmd == RTM_GET) { 1094 do { 1095 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1096 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1097 if (l < 0) 1098 warn("read from routing socket"); 1099 else 1100 print_getmsg(&rtm, l); 1101 } 1102 #undef rtm 1103 return (0); 1104 } 1105 1106 void 1107 mask_addr() 1108 { 1109 int olen = so_mask.sa.sa_len; 1110 register char *cp1 = olen + (char *)&so_mask, *cp2; 1111 1112 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1113 if (*--cp1 != 0) { 1114 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1115 break; 1116 } 1117 if ((rtm_addrs & RTA_DST) == 0) 1118 return; 1119 switch (so_dst.sa.sa_family) { 1120 #ifdef NS 1121 case AF_NS: 1122 #endif 1123 case AF_INET: 1124 #ifdef CCITT 1125 case AF_CCITT: 1126 #endif 1127 case 0: 1128 return; 1129 #ifdef ISO 1130 case AF_ISO: 1131 olen = MIN(so_dst.siso.siso_nlen, 1132 MAX(so_mask.sa.sa_len - 6, 0)); 1133 break; 1134 #endif 1135 } 1136 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1137 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1138 while (cp2 > cp1) 1139 *--cp2 = 0; 1140 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1141 while (cp1 > so_dst.sa.sa_data) 1142 *--cp1 &= *--cp2; 1143 #ifdef ISO 1144 switch (so_dst.sa.sa_family) { 1145 case AF_ISO: 1146 so_dst.siso.siso_nlen = olen; 1147 break; 1148 } 1149 #endif 1150 } 1151 1152 char *msgtypes[] = { 1153 "", 1154 "RTM_ADD: Add Route", 1155 "RTM_DELETE: Delete Route", 1156 "RTM_CHANGE: Change Metrics or flags", 1157 "RTM_GET: Report Metrics", 1158 "RTM_LOSING: Kernel Suspects Partitioning", 1159 "RTM_REDIRECT: Told to use different route", 1160 "RTM_MISS: Lookup failed on this address", 1161 "RTM_LOCK: fix specified metrics", 1162 "RTM_OLDADD: caused by SIOCADDRT", 1163 "RTM_OLDDEL: caused by SIOCDELRT", 1164 "RTM_RESOLVE: Route created by cloning", 1165 "RTM_NEWADDR: address being added to iface", 1166 "RTM_DELADDR: address being removed from iface", 1167 "RTM_IFINFO: iface status change", 1168 0, 1169 }; 1170 1171 char metricnames[] = 1172 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1173 char routeflags[] = 1174 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\017PROTO2\020PROTO1"; 1175 char ifnetflags[] = 1176 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1177 char addrnames[] = 1178 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1179 1180 void 1181 print_rtmsg(rtm, msglen) 1182 register struct rt_msghdr *rtm; 1183 int msglen; 1184 { 1185 struct if_msghdr *ifm; 1186 struct ifa_msghdr *ifam; 1187 1188 if (verbose == 0) 1189 return; 1190 if (rtm->rtm_version != RTM_VERSION) { 1191 (void) printf("routing message version %d not understood\n", 1192 rtm->rtm_version); 1193 return; 1194 } 1195 (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen); 1196 switch (rtm->rtm_type) { 1197 case RTM_IFINFO: 1198 ifm = (struct if_msghdr *)rtm; 1199 (void) printf("if# %d, flags:", ifm->ifm_index); 1200 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1201 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1202 break; 1203 case RTM_NEWADDR: 1204 case RTM_DELADDR: 1205 ifam = (struct ifa_msghdr *)rtm; 1206 (void) printf("metric %d, flags:", ifam->ifam_metric); 1207 bprintf(stdout, ifam->ifam_flags, routeflags); 1208 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1209 break; 1210 default: 1211 (void) printf("pid: %ld, seq %d, errno %d, flags:", 1212 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1213 bprintf(stdout, rtm->rtm_flags, routeflags); 1214 pmsg_common(rtm); 1215 } 1216 } 1217 1218 void 1219 print_getmsg(rtm, msglen) 1220 register struct rt_msghdr *rtm; 1221 int msglen; 1222 { 1223 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1224 struct sockaddr_dl *ifp = NULL; 1225 register struct sockaddr *sa; 1226 register char *cp; 1227 register int i; 1228 1229 (void) printf(" route to: %s\n", routename(&so_dst)); 1230 if (rtm->rtm_version != RTM_VERSION) { 1231 warnx("routing message version %d not understood", 1232 rtm->rtm_version); 1233 return; 1234 } 1235 if (rtm->rtm_msglen > msglen) { 1236 warnx("message length mismatch, in packet %d, returned %d\n", 1237 rtm->rtm_msglen, msglen); 1238 } 1239 if (rtm->rtm_errno) { 1240 errno = rtm->rtm_errno; 1241 warn("message indicates error %d", errno); 1242 return; 1243 } 1244 cp = ((char *)(rtm + 1)); 1245 if (rtm->rtm_addrs) 1246 for (i = 1; i; i <<= 1) 1247 if (i & rtm->rtm_addrs) { 1248 sa = (struct sockaddr *)cp; 1249 switch (i) { 1250 case RTA_DST: 1251 dst = sa; 1252 break; 1253 case RTA_GATEWAY: 1254 gate = sa; 1255 break; 1256 case RTA_NETMASK: 1257 mask = sa; 1258 break; 1259 case RTA_IFP: 1260 if (sa->sa_family == AF_LINK && 1261 ((struct sockaddr_dl *)sa)->sdl_nlen) 1262 ifp = (struct sockaddr_dl *)sa; 1263 break; 1264 } 1265 ADVANCE(cp, sa); 1266 } 1267 if (dst && mask) 1268 mask->sa_family = dst->sa_family; /* XXX */ 1269 if (dst) 1270 (void)printf("destination: %s\n", routename(dst)); 1271 if (mask) { 1272 int savenflag = nflag; 1273 1274 nflag = 1; 1275 (void)printf(" mask: %s\n", routename(mask)); 1276 nflag = savenflag; 1277 } 1278 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1279 (void)printf(" gateway: %s\n", routename(gate)); 1280 if (ifp) 1281 (void)printf(" interface: %.*s\n", 1282 ifp->sdl_nlen, ifp->sdl_data); 1283 (void)printf(" flags: "); 1284 bprintf(stdout, rtm->rtm_flags, routeflags); 1285 1286 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1287 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1288 1289 (void) printf("\n%s\n", "\ 1290 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1291 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1292 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1293 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1294 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1295 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1296 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1297 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1298 if (rtm->rtm_rmx.rmx_expire) 1299 rtm->rtm_rmx.rmx_expire -= time(0); 1300 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1301 #undef lock 1302 #undef msec 1303 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1304 if (verbose) 1305 pmsg_common(rtm); 1306 else if (rtm->rtm_addrs &~ RTA_IGN) { 1307 (void) printf("sockaddrs: "); 1308 bprintf(stdout, rtm->rtm_addrs, addrnames); 1309 putchar('\n'); 1310 } 1311 #undef RTA_IGN 1312 } 1313 1314 void 1315 pmsg_common(rtm) 1316 register struct rt_msghdr *rtm; 1317 { 1318 (void) printf("\nlocks: "); 1319 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1320 (void) printf(" inits: "); 1321 bprintf(stdout, rtm->rtm_inits, metricnames); 1322 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1323 } 1324 1325 void 1326 pmsg_addrs(cp, addrs) 1327 char *cp; 1328 int addrs; 1329 { 1330 register struct sockaddr *sa; 1331 int i; 1332 1333 if (addrs == 0) 1334 return; 1335 (void) printf("\nsockaddrs: "); 1336 bprintf(stdout, addrs, addrnames); 1337 (void) putchar('\n'); 1338 for (i = 1; i; i <<= 1) 1339 if (i & addrs) { 1340 sa = (struct sockaddr *)cp; 1341 (void) printf(" %s", routename(sa)); 1342 ADVANCE(cp, sa); 1343 } 1344 (void) putchar('\n'); 1345 (void) fflush(stdout); 1346 } 1347 1348 void 1349 bprintf(fp, b, s) 1350 register FILE *fp; 1351 register int b; 1352 register u_char *s; 1353 { 1354 register int i; 1355 int gotsome = 0; 1356 1357 if (b == 0) 1358 return; 1359 while ((i = *s++) != 0) { 1360 if (b & (1 << (i-1))) { 1361 if (gotsome == 0) 1362 i = '<'; 1363 else 1364 i = ','; 1365 (void) putc(i, fp); 1366 gotsome = 1; 1367 for (; (i = *s) > 32; s++) 1368 (void) putc(i, fp); 1369 } else 1370 while (*s > 32) 1371 s++; 1372 } 1373 if (gotsome) 1374 (void) putc('>', fp); 1375 } 1376 1377 int 1378 keyword(cp) 1379 char *cp; 1380 { 1381 register struct keytab *kt = keywords; 1382 1383 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1384 kt++; 1385 return kt->kt_i; 1386 } 1387 1388 void 1389 sodump(su, which) 1390 register sup su; 1391 char *which; 1392 { 1393 switch (su->sa.sa_family) { 1394 case AF_LINK: 1395 (void) printf("%s: link %s; ", 1396 which, link_ntoa(&su->sdl)); 1397 break; 1398 #ifdef ISO 1399 case AF_ISO: 1400 (void) printf("%s: iso %s; ", 1401 which, iso_ntoa(&su->siso.siso_addr)); 1402 break; 1403 #endif 1404 case AF_INET: 1405 (void) printf("%s: inet %s; ", 1406 which, inet_ntoa(su->sin.sin_addr)); 1407 break; 1408 #ifdef NS 1409 case AF_NS: 1410 (void) printf("%s: xns %s; ", 1411 which, ns_ntoa(su->sns.sns_addr)); 1412 break; 1413 #endif 1414 } 1415 (void) fflush(stdout); 1416 } 1417 1418 /* States*/ 1419 #define VIRGIN 0 1420 #define GOTONE 1 1421 #define GOTTWO 2 1422 /* Inputs */ 1423 #define DIGIT (4*0) 1424 #define END (4*1) 1425 #define DELIM (4*2) 1426 1427 void 1428 sockaddr(addr, sa) 1429 register char *addr; 1430 register struct sockaddr *sa; 1431 { 1432 register char *cp = (char *)sa; 1433 int size = sa->sa_len; 1434 char *cplim = cp + size; 1435 register int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1436 1437 bzero(cp, size); 1438 cp++; 1439 do { 1440 if ((*addr >= '0') && (*addr <= '9')) { 1441 new = *addr - '0'; 1442 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1443 new = *addr - 'a' + 10; 1444 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1445 new = *addr - 'A' + 10; 1446 } else if (*addr == 0) 1447 state |= END; 1448 else 1449 state |= DELIM; 1450 addr++; 1451 switch (state /* | INPUT */) { 1452 case GOTTWO | DIGIT: 1453 *cp++ = byte; /*FALLTHROUGH*/ 1454 case VIRGIN | DIGIT: 1455 state = GOTONE; byte = new; continue; 1456 case GOTONE | DIGIT: 1457 state = GOTTWO; byte = new + (byte << 4); continue; 1458 default: /* | DELIM */ 1459 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1460 case GOTONE | END: 1461 case GOTTWO | END: 1462 *cp++ = byte; /* FALLTHROUGH */ 1463 case VIRGIN | END: 1464 break; 1465 } 1466 break; 1467 } while (cp < cplim); 1468 sa->sa_len = cp - (char *)sa; 1469 } 1470