1 /* $NetBSD: rtquery.c,v 1.21 2008/07/20 01:20:23 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 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 acknowledgment: 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 #include <sys/cdefs.h> 37 #include <sys/param.h> 38 #include <sys/protosw.h> 39 #include <sys/socket.h> 40 #include <sys/time.h> 41 #include <netinet/in.h> 42 #define RIPVERSION RIPv2 43 #include <protocols/routed.h> 44 #include <arpa/inet.h> 45 #include <netdb.h> 46 #include <errno.h> 47 #include <unistd.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #ifdef sgi 52 #include <strings.h> 53 #include <bstring.h> 54 #endif 55 56 #define UNUSED __unused 57 #ifndef __RCSID 58 #define __RCSID(_s) static const char rcsid[] UNUSED = _s 59 #endif 60 #ifndef __COPYRIGHT 61 #define __COPYRIGHT(_s) static const char copyright[] UNUSED = _s 62 #endif 63 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\ 64 The Regents of the University of California. All rights reserved."); 65 #ifdef __NetBSD__ 66 __RCSID("$NetBSD: rtquery.c,v 1.21 2008/07/20 01:20:23 lukem Exp $"); 67 #elif defined(__FreeBSD__) 68 __RCSID("$FreeBSD$"); 69 #else 70 __RCSID("Revision: 2.26 "); 71 #ident "Revision: 2.26 " 72 #endif 73 74 #ifndef sgi 75 #define _HAVE_SIN_LEN 76 #endif 77 78 #ifdef __NetBSD__ 79 #include <md5.h> 80 #else 81 #define MD5_DIGEST_LEN 16 82 typedef struct { 83 u_int32_t state[4]; /* state (ABCD) */ 84 u_int32_t count[2]; /* # of bits, modulo 2^64 (LSB 1st) */ 85 unsigned char buffer[64]; /* input buffer */ 86 } MD5_CTX; 87 extern void MD5Init(MD5_CTX*); 88 extern void MD5Update(MD5_CTX*, u_char*, u_int); 89 extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*); 90 #endif 91 92 93 #define WTIME 15 /* Time to wait for all responses */ 94 #define STIME (250*1000) /* usec to wait for another response */ 95 96 int soc; 97 98 const char *pgmname; 99 100 union { 101 struct rip rip; 102 char packet[MAXPACKETSIZE+MAXPATHLEN]; 103 } omsg_buf; 104 #define OMSG omsg_buf.rip 105 int omsg_len = sizeof(struct rip); 106 107 union { 108 struct rip rip; 109 char packet[MAXPACKETSIZE+1024]; 110 } imsg_buf; 111 #define IMSG imsg_buf.rip 112 113 int nflag; /* numbers, no names */ 114 int pflag; /* play the `gated` game */ 115 int ripv2 = 1; /* use RIP version 2 */ 116 int wtime = WTIME; 117 int rflag; /* 1=ask about a particular route */ 118 int trace, not_trace; /* send trace command or not */ 119 int auth_type = RIP_AUTH_NONE; 120 char passwd[RIP_AUTH_PW_LEN]; 121 u_long keyid; 122 123 struct timeval sent; /* when query sent */ 124 125 static char localhost_str[] = "localhost"; 126 static char *default_argv[] = {localhost_str, 0}; 127 128 static void rip_input(struct sockaddr_in*, int); 129 static int out(const char *); 130 static void trace_loop(char *argv[]) __dead; 131 static void query_loop(char *argv[], int) __dead; 132 static int getnet(char *, struct netinfo *); 133 static u_int std_mask(u_int); 134 static int parse_quote(char **, const char *, char *, char *, int); 135 static void usage(void); 136 137 138 int 139 main(int argc, 140 char *argv[]) 141 { 142 int ch, bsize; 143 char *p, *options, *value, delim; 144 const char *result; 145 146 delim = 0; /* XXX gcc */ 147 148 OMSG.rip_nets[0].n_dst = RIP_DEFAULT; 149 OMSG.rip_nets[0].n_family = RIP_AF_UNSPEC; 150 OMSG.rip_nets[0].n_metric = htonl(HOPCNT_INFINITY); 151 152 pgmname = argv[0]; 153 while ((ch = getopt(argc, argv, "np1w:r:t:a:")) != -1) 154 switch (ch) { 155 case 'n': 156 not_trace = 1; 157 nflag = 1; 158 break; 159 160 case 'p': 161 not_trace = 1; 162 pflag = 1; 163 break; 164 165 case '1': 166 ripv2 = 0; 167 break; 168 169 case 'w': 170 not_trace = 1; 171 wtime = (int)strtoul(optarg, &p, 0); 172 if (*p != '\0' 173 || wtime <= 0) 174 usage(); 175 break; 176 177 case 'r': 178 not_trace = 1; 179 if (rflag) 180 usage(); 181 rflag = getnet(optarg, &OMSG.rip_nets[0]); 182 if (!rflag) { 183 struct hostent *hp = gethostbyname(optarg); 184 if (hp == 0) { 185 fprintf(stderr, "%s: %s:", 186 pgmname, optarg); 187 herror(0); 188 exit(1); 189 } 190 memcpy(&OMSG.rip_nets[0].n_dst, hp->h_addr, 191 sizeof(OMSG.rip_nets[0].n_dst)); 192 OMSG.rip_nets[0].n_family = RIP_AF_INET; 193 OMSG.rip_nets[0].n_mask = -1; 194 rflag = 1; 195 } 196 break; 197 198 case 't': 199 trace = 1; 200 options = optarg; 201 while (*options != '\0') { 202 /* messy complications to make -W -Wall happy */ 203 static char on_str[] = "on"; 204 static char more_str[] = "more"; 205 static char off_str[] = "off"; 206 static char dump_str[] = "dump"; 207 static char *traceopts[] = { 208 # define TRACE_ON 0 209 on_str, 210 # define TRACE_MORE 1 211 more_str, 212 # define TRACE_OFF 2 213 off_str, 214 # define TRACE_DUMP 3 215 dump_str, 216 0 217 }; 218 result = ""; 219 switch (getsubopt(&options,traceopts,&value)) { 220 case TRACE_ON: 221 OMSG.rip_cmd = RIPCMD_TRACEON; 222 if (!value 223 || strlen(value) > MAXPATHLEN) 224 usage(); 225 result = value; 226 break; 227 case TRACE_MORE: 228 if (value) 229 usage(); 230 OMSG.rip_cmd = RIPCMD_TRACEON; 231 break; 232 case TRACE_OFF: 233 if (value) 234 usage(); 235 OMSG.rip_cmd = RIPCMD_TRACEOFF; 236 break; 237 case TRACE_DUMP: 238 if (value) 239 usage(); 240 OMSG.rip_cmd = RIPCMD_TRACEON; 241 result = "dump/../table"; 242 break; 243 default: 244 usage(); 245 } 246 strcpy((char*)OMSG.rip_tracefile, result); 247 omsg_len += strlen(result) - sizeof(OMSG.ripun); 248 } 249 break; 250 251 case 'a': 252 not_trace = 1; 253 p = strchr(optarg,'='); 254 if (!p) 255 usage(); 256 *p++ = '\0'; 257 if (!strcasecmp("passwd",optarg)) 258 auth_type = RIP_AUTH_PW; 259 else if (!strcasecmp("md5_passwd",optarg)) 260 auth_type = RIP_AUTH_MD5; 261 else 262 usage(); 263 if (0 > parse_quote(&p,"|",&delim, 264 passwd, sizeof(passwd))) 265 usage(); 266 if (auth_type == RIP_AUTH_MD5 267 && delim == '|') { 268 keyid = strtoul(p+1,&p,0); 269 if (keyid > 255 || *p != '\0') 270 usage(); 271 } else if (delim != '\0') { 272 usage(); 273 } 274 break; 275 276 default: 277 usage(); 278 } 279 argv += optind; 280 argc -= optind; 281 if (not_trace && trace) 282 usage(); 283 if (argc == 0) { 284 argc = 1; 285 argv = default_argv; 286 } 287 288 soc = socket(AF_INET, SOCK_DGRAM, 0); 289 if (soc < 0) { 290 perror("socket"); 291 exit(2); 292 } 293 294 /* be prepared to receive a lot of routes */ 295 for (bsize = 127*1024; ; bsize -= 1024) { 296 if (setsockopt(soc, SOL_SOCKET, SO_RCVBUF, 297 &bsize, sizeof(bsize)) == 0) 298 break; 299 if (bsize <= 4*1024) { 300 perror("setsockopt SO_RCVBUF"); 301 break; 302 } 303 } 304 305 if (trace) 306 trace_loop(argv); 307 else 308 query_loop(argv, argc); 309 /* NOTREACHED */ 310 return 0; 311 } 312 313 314 static void 315 usage(void) 316 { 317 fprintf(stderr, 318 "usage: rtquery [-np1] [-r tgt_rt] [-w wtime]" 319 " [-a type=passwd] host1 [host2 ...]\n" 320 "\trtquery -t {on=filename|more|off|dump}" 321 " host1 [host2 ...]\n"); 322 exit(1); 323 } 324 325 326 /* tell the target hosts about tracing 327 */ 328 static void 329 trace_loop(char *argv[]) 330 { 331 struct sockaddr_in myaddr; 332 int res; 333 334 if (geteuid() != 0) { 335 (void)fprintf(stderr, "-t requires UID 0\n"); 336 exit(1); 337 } 338 339 if (ripv2) { 340 OMSG.rip_vers = RIPv2; 341 } else { 342 OMSG.rip_vers = RIPv1; 343 } 344 345 memset(&myaddr, 0, sizeof(myaddr)); 346 myaddr.sin_family = AF_INET; 347 #ifdef _HAVE_SIN_LEN 348 myaddr.sin_len = sizeof(myaddr); 349 #endif 350 myaddr.sin_port = htons(IPPORT_RESERVED-1); 351 while (bind(soc, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) { 352 if (errno != EADDRINUSE 353 || myaddr.sin_port == 0) { 354 perror("bind"); 355 exit(2); 356 } 357 myaddr.sin_port = htons(ntohs(myaddr.sin_port)-1); 358 } 359 360 res = 1; 361 while (*argv != 0) { 362 if (out(*argv++) <= 0) 363 res = 0; 364 } 365 exit(res); 366 } 367 368 369 /* query all of the listed hosts 370 */ 371 static void 372 query_loop(char *argv[], int argc) 373 { 374 # define NA0 (OMSG.rip_auths[0]) 375 # define NA2 (OMSG.rip_auths[2]) 376 struct seen { 377 struct seen *next; 378 struct in_addr addr; 379 } *seen, *sp; 380 int answered = 0; 381 int cc; 382 fd_set bits; 383 struct timeval now, delay; 384 struct sockaddr_in from; 385 socklen_t fromlen; 386 MD5_CTX md5_ctx; 387 388 389 OMSG.rip_cmd = (pflag) ? RIPCMD_POLL : RIPCMD_REQUEST; 390 if (ripv2) { 391 OMSG.rip_vers = RIPv2; 392 if (auth_type == RIP_AUTH_PW) { 393 OMSG.rip_nets[1] = OMSG.rip_nets[0]; 394 NA0.a_family = RIP_AF_AUTH; 395 NA0.a_type = RIP_AUTH_PW; 396 memcpy(NA0.au.au_pw, passwd, RIP_AUTH_PW_LEN); 397 omsg_len += sizeof(OMSG.rip_nets[0]); 398 399 } else if (auth_type == RIP_AUTH_MD5) { 400 OMSG.rip_nets[1] = OMSG.rip_nets[0]; 401 NA0.a_family = RIP_AF_AUTH; 402 NA0.a_type = RIP_AUTH_MD5; 403 NA0.au.a_md5.md5_keyid = (int8_t)keyid; 404 NA0.au.a_md5.md5_auth_len = RIP_AUTH_MD5_KEY_LEN; 405 NA0.au.a_md5.md5_seqno = 0; 406 cc = (char *)&NA2-(char *)&OMSG; 407 NA0.au.a_md5.md5_pkt_len = htons(cc); 408 NA2.a_family = RIP_AF_AUTH; 409 NA2.a_type = htons(1); 410 MD5Init(&md5_ctx); 411 MD5Update(&md5_ctx, 412 (u_char *)&OMSG, cc); 413 MD5Update(&md5_ctx, 414 (u_char *)passwd, RIP_AUTH_MD5_HASH_LEN); 415 MD5Final(NA2.au.au_pw, &md5_ctx); 416 omsg_len += 2*sizeof(OMSG.rip_nets[0]); 417 } 418 419 } else { 420 OMSG.rip_vers = RIPv1; 421 OMSG.rip_nets[0].n_mask = 0; 422 } 423 424 /* ask the first (valid) host */ 425 seen = 0; 426 while (0 > out(*argv++)) { 427 if (*argv == 0) 428 exit(1); 429 answered++; 430 } 431 432 FD_ZERO(&bits); 433 for (;;) { 434 FD_SET(soc, &bits); 435 delay.tv_sec = 0; 436 delay.tv_usec = STIME; 437 cc = select(soc+1, &bits, 0,0, &delay); 438 if (cc > 0) { 439 fromlen = sizeof(from); 440 cc = recvfrom(soc, imsg_buf.packet, 441 sizeof(imsg_buf.packet), 0, 442 (struct sockaddr *)&from, &fromlen); 443 if (cc < 0) { 444 perror("recvfrom"); 445 exit(1); 446 } 447 /* count the distinct responding hosts. 448 * You cannot match responding hosts with 449 * addresses to which queries were transmitted, 450 * because a router might respond with a 451 * different source address. 452 */ 453 for (sp = seen; sp != 0; sp = sp->next) { 454 if (sp->addr.s_addr == from.sin_addr.s_addr) 455 break; 456 } 457 if (sp == 0) { 458 sp = malloc(sizeof(*sp)); 459 if (sp == 0) { 460 fprintf(stderr, 461 "rtquery: malloc failed\n"); 462 exit(1); 463 } 464 sp->addr = from.sin_addr; 465 sp->next = seen; 466 seen = sp; 467 answered++; 468 } 469 470 rip_input(&from, cc); 471 continue; 472 } 473 474 if (cc < 0) { 475 if (errno == EINTR) 476 continue; 477 perror("select"); 478 exit(1); 479 } 480 481 /* After a pause in responses, probe another host. 482 * This reduces the intermingling of answers. 483 */ 484 while (*argv != 0 && 0 > out(*argv++)) 485 answered++; 486 487 /* continue until no more packets arrive 488 * or we have heard from all hosts 489 */ 490 if (answered >= argc) 491 break; 492 493 /* or until we have waited a long time 494 */ 495 if (gettimeofday(&now, 0) < 0) { 496 perror("gettimeofday(now)"); 497 exit(1); 498 } 499 if (sent.tv_sec + wtime <= now.tv_sec) 500 break; 501 } 502 503 /* fail if there was no answer */ 504 exit (answered >= argc ? 0 : 1); 505 } 506 507 508 /* send to one host 509 */ 510 static int 511 out(const char *host) 512 { 513 struct sockaddr_in router; 514 struct hostent *hp; 515 516 if (gettimeofday(&sent, 0) < 0) { 517 perror("gettimeofday(sent)"); 518 return -1; 519 } 520 521 memset(&router, 0, sizeof(router)); 522 router.sin_family = AF_INET; 523 #ifdef _HAVE_SIN_LEN 524 router.sin_len = sizeof(router); 525 #endif 526 if (!inet_aton(host, &router.sin_addr)) { 527 hp = gethostbyname(host); 528 if (hp == 0) { 529 herror(host); 530 return -1; 531 } 532 memcpy(&router.sin_addr, hp->h_addr, sizeof(router.sin_addr)); 533 } 534 router.sin_port = htons(RIP_PORT); 535 536 if (sendto(soc, &omsg_buf, omsg_len, 0, 537 (struct sockaddr *)&router, sizeof(router)) < 0) { 538 perror(host); 539 return -1; 540 } 541 542 return 0; 543 } 544 545 546 /* 547 * Convert string to printable characters 548 */ 549 static char * 550 qstring(u_char *s, int len) 551 { 552 static char buf[8*20+1]; 553 char *p; 554 u_char *s2, c; 555 556 557 for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) { 558 c = *s++; 559 if (c == '\0') { 560 for (s2 = s+1; s2 < &s[len]; s2++) { 561 if (*s2 != '\0') 562 break; 563 } 564 if (s2 >= &s[len]) 565 goto exit; 566 } 567 568 if (c >= ' ' && c < 0x7f && c != '\\') { 569 *p++ = c; 570 continue; 571 } 572 *p++ = '\\'; 573 switch (c) { 574 case '\\': 575 *p++ = '\\'; 576 break; 577 case '\n': 578 *p++= 'n'; 579 break; 580 case '\r': 581 *p++= 'r'; 582 break; 583 case '\t': 584 *p++ = 't'; 585 break; 586 case '\b': 587 *p++ = 'b'; 588 break; 589 default: 590 p += sprintf(p,"%o",c); 591 break; 592 } 593 } 594 exit: 595 *p = '\0'; 596 return buf; 597 } 598 599 600 /* 601 * Handle an incoming RIP packet. 602 */ 603 static void 604 rip_input(struct sockaddr_in *from, 605 int size) 606 { 607 struct netinfo *n, *lim; 608 struct in_addr in; 609 const char *name; 610 char net_buf[80]; 611 u_char hash[RIP_AUTH_MD5_KEY_LEN]; 612 MD5_CTX md5_ctx; 613 u_char md5_authed = 0; 614 u_int mask, dmask; 615 char *sp; 616 int i; 617 struct hostent *hp; 618 struct netent *np; 619 struct netauth *na; 620 621 622 if (nflag) { 623 printf("%s:", inet_ntoa(from->sin_addr)); 624 } else { 625 hp = gethostbyaddr((char*)&from->sin_addr, 626 sizeof(struct in_addr), AF_INET); 627 if (hp == 0) { 628 printf("%s:", 629 inet_ntoa(from->sin_addr)); 630 } else { 631 printf("%s (%s):", hp->h_name, 632 inet_ntoa(from->sin_addr)); 633 } 634 } 635 if (IMSG.rip_cmd != RIPCMD_RESPONSE) { 636 printf("\n unexpected response type %d\n", IMSG.rip_cmd); 637 return; 638 } 639 printf(" RIPv%d%s %d bytes\n", IMSG.rip_vers, 640 (IMSG.rip_vers != RIPv1 && IMSG.rip_vers != RIPv2) ? " ?" : "", 641 size); 642 if (size > MAXPACKETSIZE) { 643 if (size > (int)sizeof(imsg_buf) - (int)sizeof(*n)) { 644 printf(" at least %d bytes too long\n", 645 size-MAXPACKETSIZE); 646 size = (int)sizeof(imsg_buf) - (int)sizeof(*n); 647 } else { 648 printf(" %d bytes too long\n", 649 size-MAXPACKETSIZE); 650 } 651 } else if (size%sizeof(*n) != sizeof(struct rip)%sizeof(*n)) { 652 printf(" response of bad length=%d\n", size); 653 } 654 655 n = IMSG.rip_nets; 656 lim = (struct netinfo *)((char*)n + size) - 1; 657 for (; n <= lim; n++) { 658 name = ""; 659 if (n->n_family == RIP_AF_INET) { 660 in.s_addr = n->n_dst; 661 (void)strcpy(net_buf, inet_ntoa(in)); 662 663 mask = ntohl(n->n_mask); 664 dmask = mask & -mask; 665 if (mask != 0) { 666 sp = &net_buf[strlen(net_buf)]; 667 if (IMSG.rip_vers == RIPv1) { 668 (void)sprintf(sp," mask=%#x ? ",mask); 669 mask = 0; 670 } else if (mask + dmask == 0) { 671 for (i = 0; 672 (i != 32 673 && ((1<<i)&mask) == 0); 674 i++) 675 continue; 676 (void)sprintf(sp, "/%d",32-i); 677 } else { 678 (void)sprintf(sp," (mask %#x)", mask); 679 } 680 } 681 682 if (!nflag) { 683 if (mask == 0) { 684 mask = std_mask(in.s_addr); 685 if ((ntohl(in.s_addr) & ~mask) != 0) 686 mask = 0; 687 } 688 /* Without a netmask, do not worry about 689 * whether the destination is a host or a 690 * network. Try both and use the first name 691 * we get. 692 * 693 * If we have a netmask we can make a 694 * good guess. 695 */ 696 if ((in.s_addr & ~mask) == 0) { 697 np = getnetbyaddr((long)in.s_addr, 698 AF_INET); 699 if (np != 0) 700 name = np->n_name; 701 else if (in.s_addr == 0) 702 name = "default"; 703 } 704 if (name[0] == '\0' 705 && ((in.s_addr & ~mask) != 0 706 || mask == 0xffffffff)) { 707 hp = gethostbyaddr((char*)&in, 708 sizeof(in), 709 AF_INET); 710 if (hp != 0) 711 name = hp->h_name; 712 } 713 } 714 715 } else if (n->n_family == RIP_AF_AUTH) { 716 na = (struct netauth*)n; 717 if (na->a_type == RIP_AUTH_PW 718 && n == IMSG.rip_nets) { 719 (void)printf(" Password Authentication:" 720 " \"%s\"\n", 721 qstring(na->au.au_pw, 722 RIP_AUTH_PW_LEN)); 723 continue; 724 } 725 726 if (na->a_type == RIP_AUTH_MD5 727 && n == IMSG.rip_nets) { 728 (void)printf(" MD5 Auth" 729 " len=%d KeyID=%d" 730 " auth_len=%d" 731 " seqno=%#x" 732 " rsvd=%#x,%#x\n", 733 ntohs(na->au.a_md5.md5_pkt_len), 734 na->au.a_md5.md5_keyid, 735 na->au.a_md5.md5_auth_len, 736 (int)ntohl(na->au.a_md5.md5_seqno), 737 na->au.a_md5.rsvd[0], 738 na->au.a_md5.rsvd[1]); 739 md5_authed = 1; 740 continue; 741 } 742 (void)printf(" Authentication type %d: ", 743 ntohs(na->a_type)); 744 for (i = 0; i < (int)sizeof(na->au.au_pw); i++) 745 (void)printf("%02x ", na->au.au_pw[i]); 746 putc('\n', stdout); 747 if (md5_authed && n+1 > lim 748 && na->a_type == ntohs(1)) { 749 MD5Init(&md5_ctx); 750 MD5Update(&md5_ctx, (u_char *)&IMSG, 751 (char *)na-(char *)&IMSG 752 +RIP_AUTH_MD5_HASH_XTRA); 753 MD5Update(&md5_ctx, (u_char *)passwd, 754 RIP_AUTH_MD5_KEY_LEN); 755 MD5Final(hash, &md5_ctx); 756 (void)printf(" %s hash\n", 757 memcmp(hash, na->au.au_pw, 758 sizeof(hash)) 759 ? "WRONG" : "correct"); 760 } 761 continue; 762 763 } else { 764 (void)sprintf(net_buf, "(af %#x) %d.%d.%d.%d", 765 ntohs(n->n_family), 766 (u_char)(n->n_dst >> 24), 767 (u_char)(n->n_dst >> 16), 768 (u_char)(n->n_dst >> 8), 769 (u_char)n->n_dst); 770 } 771 772 (void)printf(" %-18s metric %2d %-10s", 773 net_buf, (int)ntohl(n->n_metric), name); 774 775 if (n->n_nhop != 0) { 776 in.s_addr = n->n_nhop; 777 if (nflag) 778 hp = 0; 779 else 780 hp = gethostbyaddr((char*)&in, sizeof(in), 781 AF_INET); 782 (void)printf(" nhop=%-15s%s", 783 (hp != 0) ? hp->h_name : inet_ntoa(in), 784 (IMSG.rip_vers == RIPv1) ? " ?" : ""); 785 } 786 if (n->n_tag != 0) 787 (void)printf(" tag=%#x%s", n->n_tag, 788 (IMSG.rip_vers == RIPv1) ? " ?" : ""); 789 putc('\n', stdout); 790 } 791 } 792 793 794 /* Return the classical netmask for an IP address. 795 */ 796 static u_int 797 std_mask(u_int addr) /* in network order */ 798 { 799 NTOHL(addr); /* was a host, not a network */ 800 801 if (addr == 0) /* default route has mask 0 */ 802 return 0; 803 if (IN_CLASSA(addr)) 804 return IN_CLASSA_NET; 805 if (IN_CLASSB(addr)) 806 return IN_CLASSB_NET; 807 return IN_CLASSC_NET; 808 } 809 810 811 /* get a network number as a name or a number, with an optional "/xx" 812 * netmask. 813 */ 814 static int /* 0=bad */ 815 getnet(char *name, 816 struct netinfo *rt) 817 { 818 int i; 819 struct netent *nentp; 820 u_int mask; 821 struct in_addr in; 822 char hname[MAXHOSTNAMELEN+1]; 823 char *mname, *p; 824 825 826 /* Detect and separate "1.2.3.4/24" 827 */ 828 if (0 != (mname = strrchr(name,'/'))) { 829 i = (int)(mname - name); 830 if (i > (int)sizeof(hname)-1) /* name too long */ 831 return 0; 832 memmove(hname, name, i); 833 hname[i] = '\0'; 834 mname++; 835 name = hname; 836 } 837 838 nentp = getnetbyname(name); 839 if (nentp != 0) { 840 in.s_addr = nentp->n_net; 841 } else if (inet_aton(name, &in) == 1) { 842 NTOHL(in.s_addr); 843 } else { 844 return 0; 845 } 846 847 if (mname == 0) { 848 mask = std_mask(in.s_addr); 849 if ((~mask & in.s_addr) != 0) 850 mask = 0xffffffff; 851 } else { 852 mask = (u_int)strtoul(mname, &p, 0); 853 if (*p != '\0' || mask > 32) 854 return 0; 855 mask = 0xffffffff << (32-mask); 856 } 857 858 rt->n_dst = htonl(in.s_addr); 859 rt->n_family = RIP_AF_INET; 860 rt->n_mask = htonl(mask); 861 return 1; 862 } 863 864 865 /* strtok(), but honoring backslash 866 */ 867 static int /* -1=bad */ 868 parse_quote(char **linep, 869 const char *delims, 870 char *delimp, 871 char *buf, 872 int lim) 873 { 874 char c, *pc; 875 const char *p; 876 877 878 pc = *linep; 879 if (*pc == '\0') 880 return -1; 881 882 for (;;) { 883 if (lim == 0) 884 return -1; 885 c = *pc++; 886 if (c == '\0') 887 break; 888 889 if (c == '\\' && *pc != '\0') { 890 if ((c = *pc++) == 'n') { 891 c = '\n'; 892 } else if (c == 'r') { 893 c = '\r'; 894 } else if (c == 't') { 895 c = '\t'; 896 } else if (c == 'b') { 897 c = '\b'; 898 } else if (c >= '0' && c <= '7') { 899 c -= '0'; 900 if (*pc >= '0' && *pc <= '7') { 901 c = (c<<3)+(*pc++ - '0'); 902 if (*pc >= '0' && *pc <= '7') 903 c = (c<<3)+(*pc++ - '0'); 904 } 905 } 906 907 } else { 908 for (p = delims; *p != '\0'; ++p) { 909 if (*p == c) 910 goto exit; 911 } 912 } 913 914 *buf++ = c; 915 --lim; 916 } 917 exit: 918 if (delimp != 0) 919 *delimp = c; 920 *linep = pc-1; 921 if (lim != 0) 922 *buf = '\0'; 923 return 0; 924 } 925