1 /*- 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgment: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: src/sbin/routed/rtquery/rtquery.c,v 1.13 1999/08/28 00:14:21 peter Exp $ 34 * $DragonFly: src/sbin/routed/rtquery/rtquery.c,v 1.4 2004/12/18 21:43:46 swildner Exp $ 35 */ 36 37 char copyright[] = 38 "@(#) Copyright (c) 1982, 1986, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 41 #include <sys/cdefs.h> 42 #include <sys/param.h> 43 #include <sys/protosw.h> 44 #include <sys/socket.h> 45 #include <sys/time.h> 46 #include <netinet/in.h> 47 #define RIPVERSION RIPv2 48 #include <protocols/routed.h> 49 #include <arpa/inet.h> 50 #include <netdb.h> 51 #include <errno.h> 52 #include <unistd.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #ifdef sgi 57 #include <strings.h> 58 #include <bstring.h> 59 #endif 60 61 #if !defined(sgi) && !defined(__NetBSD__) 62 static char sccsid[] __attribute__((unused))= "@(#)query.c 8.1 (Berkeley) 6/5/93"; 63 #elif defined(__NetBSD__) 64 __RCSID("$NetBSD: rtquery.c,v 1.10 1999/02/23 10:47:41 christos Exp $"); 65 #endif 66 67 #ifndef sgi 68 #define _HAVE_SIN_LEN 69 #endif 70 71 #define MD5_DIGEST_LEN 16 72 typedef struct { 73 u_int32_t state[4]; /* state (ABCD) */ 74 u_int32_t count[2]; /* # of bits, modulo 2^64 (LSB 1st) */ 75 unsigned char buffer[64]; /* input buffer */ 76 } MD5_CTX; 77 extern void MD5Init(MD5_CTX*); 78 extern void MD5Update(MD5_CTX*, u_char*, u_int); 79 extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*); 80 81 82 #define WTIME 15 /* Time to wait for all responses */ 83 #define STIME (250*1000) /* usec to wait for another response */ 84 85 int soc; 86 87 const char *pgmname; 88 89 union { 90 struct rip rip; 91 char packet[MAXPACKETSIZE+MAXPATHLEN]; 92 } omsg_buf; 93 #define OMSG omsg_buf.rip 94 int omsg_len = sizeof(struct rip); 95 96 union { 97 struct rip rip; 98 char packet[MAXPACKETSIZE+1024]; 99 } imsg_buf; 100 #define IMSG imsg_buf.rip 101 102 int nflag; /* numbers, no names */ 103 int pflag; /* play the `gated` game */ 104 int ripv2 = 1; /* use RIP version 2 */ 105 int wtime = WTIME; 106 int rflag; /* 1=ask about a particular route */ 107 int trace, not_trace; /* send trace command or not */ 108 int auth_type = RIP_AUTH_NONE; 109 char passwd[RIP_AUTH_PW_LEN]; 110 u_long keyid; 111 112 struct timeval sent; /* when query sent */ 113 114 static char localhost_str[] = "localhost"; 115 static char *default_argv[] = {localhost_str, 0}; 116 117 static void rip_input(struct sockaddr_in*, int); 118 static int out(const char *); 119 static void trace_loop(char *argv[]) __attribute((__noreturn__)); 120 static void query_loop(char *argv[], int) __attribute((__noreturn__)); 121 static int getnet(char *, struct netinfo *); 122 static u_int std_mask(u_int); 123 static int parse_quote(char **, const char *, char *, char *, int); 124 static void usage(void); 125 126 127 int 128 main(int argc, 129 char *argv[]) 130 { 131 int ch, bsize; 132 char *p, *options, *value, delim; 133 const char *result; 134 135 OMSG.rip_nets[0].n_dst = RIP_DEFAULT; 136 OMSG.rip_nets[0].n_family = RIP_AF_UNSPEC; 137 OMSG.rip_nets[0].n_metric = htonl(HOPCNT_INFINITY); 138 139 pgmname = argv[0]; 140 delim = 0; 141 while ((ch = getopt(argc, argv, "np1w:r:t:a:")) != -1) 142 switch (ch) { 143 case 'n': 144 not_trace = 1; 145 nflag = 1; 146 break; 147 148 case 'p': 149 not_trace = 1; 150 pflag = 1; 151 break; 152 153 case '1': 154 ripv2 = 0; 155 break; 156 157 case 'w': 158 not_trace = 1; 159 wtime = (int)strtoul(optarg, &p, 0); 160 if (*p != '\0' 161 || wtime <= 0) 162 usage(); 163 break; 164 165 case 'r': 166 not_trace = 1; 167 if (rflag) 168 usage(); 169 rflag = getnet(optarg, &OMSG.rip_nets[0]); 170 if (!rflag) { 171 struct hostent *hp = gethostbyname(optarg); 172 if (hp == 0) { 173 fprintf(stderr, "%s: %s:", 174 pgmname, optarg); 175 herror(0); 176 exit(1); 177 } 178 memcpy(&OMSG.rip_nets[0].n_dst, hp->h_addr, 179 sizeof(OMSG.rip_nets[0].n_dst)); 180 OMSG.rip_nets[0].n_family = RIP_AF_INET; 181 OMSG.rip_nets[0].n_mask = -1; 182 rflag = 1; 183 } 184 break; 185 186 case 't': 187 trace = 1; 188 options = optarg; 189 while (*options != '\0') { 190 /* messy complications to make -W -Wall happy */ 191 static char on_str[] = "on"; 192 static char more_str[] = "more"; 193 static char off_str[] = "off"; 194 static char dump_str[] = "dump"; 195 static char *traceopts[] = { 196 # define TRACE_ON 0 197 on_str, 198 # define TRACE_MORE 1 199 more_str, 200 # define TRACE_OFF 2 201 off_str, 202 # define TRACE_DUMP 3 203 dump_str, 204 0 205 }; 206 result = ""; 207 switch (getsubopt(&options,traceopts,&value)) { 208 case TRACE_ON: 209 OMSG.rip_cmd = RIPCMD_TRACEON; 210 if (!value 211 || strlen(value) > MAXPATHLEN) 212 usage(); 213 result = value; 214 break; 215 case TRACE_MORE: 216 if (value) 217 usage(); 218 OMSG.rip_cmd = RIPCMD_TRACEON; 219 break; 220 case TRACE_OFF: 221 if (value) 222 usage(); 223 OMSG.rip_cmd = RIPCMD_TRACEOFF; 224 break; 225 case TRACE_DUMP: 226 if (value) 227 usage(); 228 OMSG.rip_cmd = RIPCMD_TRACEON; 229 result = "dump/../table"; 230 break; 231 default: 232 usage(); 233 } 234 strcpy((char*)OMSG.rip_tracefile, result); 235 omsg_len += strlen(result) - sizeof(OMSG.ripun); 236 } 237 break; 238 239 case 'a': 240 not_trace = 1; 241 p = strchr(optarg,'='); 242 if (!p) 243 usage(); 244 *p++ = '\0'; 245 if (!strcasecmp("passwd",optarg)) 246 auth_type = RIP_AUTH_PW; 247 else if (!strcasecmp("md5_passwd",optarg)) 248 auth_type = RIP_AUTH_MD5; 249 else 250 usage(); 251 if (0 > parse_quote(&p,"|",&delim, 252 passwd, sizeof(passwd))) 253 usage(); 254 if (auth_type == RIP_AUTH_MD5 255 && delim == '|') { 256 keyid = strtoul(p+1,&p,0); 257 if (keyid > 255 || *p != '\0') 258 usage(); 259 } else if (delim != '\0') { 260 usage(); 261 } 262 break; 263 264 default: 265 usage(); 266 } 267 argv += optind; 268 argc -= optind; 269 if (not_trace && trace) 270 usage(); 271 if (argc == 0) { 272 argc = 1; 273 argv = default_argv; 274 } 275 276 soc = socket(AF_INET, SOCK_DGRAM, 0); 277 if (soc < 0) { 278 perror("socket"); 279 exit(2); 280 } 281 282 /* be prepared to receive a lot of routes */ 283 for (bsize = 127*1024; ; bsize -= 1024) { 284 if (setsockopt(soc, SOL_SOCKET, SO_RCVBUF, 285 &bsize, sizeof(bsize)) == 0) 286 break; 287 if (bsize <= 4*1024) { 288 perror("setsockopt SO_RCVBUF"); 289 break; 290 } 291 } 292 293 if (trace) 294 trace_loop(argv); 295 else 296 query_loop(argv, argc); 297 /* NOTREACHED */ 298 return 0; 299 } 300 301 302 static void 303 usage(void) 304 { 305 fprintf(stderr, 306 "usage: rtquery [-np1] [-r tgt_rt] [-w wtime]" 307 " [-a type=passwd] host1 [host2 ...]\n" 308 "\trtquery -t {on=filename|more|off|dump}" 309 " host1 [host2 ...]\n"); 310 exit(1); 311 } 312 313 314 /* tell the target hosts about tracing 315 */ 316 static void 317 trace_loop(char *argv[]) 318 { 319 struct sockaddr_in myaddr; 320 int res; 321 322 if (geteuid() != 0) { 323 fprintf(stderr, "-t requires UID 0\n"); 324 exit(1); 325 } 326 327 if (ripv2) { 328 OMSG.rip_vers = RIPv2; 329 } else { 330 OMSG.rip_vers = RIPv1; 331 } 332 333 memset(&myaddr, 0, sizeof(myaddr)); 334 myaddr.sin_family = AF_INET; 335 #ifdef _HAVE_SIN_LEN 336 myaddr.sin_len = sizeof(myaddr); 337 #endif 338 myaddr.sin_port = htons(IPPORT_RESERVED-1); 339 while (bind(soc, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) { 340 if (errno != EADDRINUSE 341 || myaddr.sin_port == 0) { 342 perror("bind"); 343 exit(2); 344 } 345 myaddr.sin_port = htons(ntohs(myaddr.sin_port)-1); 346 } 347 348 res = 1; 349 while (*argv != 0) { 350 if (out(*argv++) <= 0) 351 res = 0; 352 } 353 exit(res); 354 } 355 356 357 /* query all of the listed hosts 358 */ 359 static void 360 query_loop(char *argv[], int argc) 361 { 362 # define NA0 (OMSG.rip_auths[0]) 363 # define NA2 (OMSG.rip_auths[2]) 364 struct seen { 365 struct seen *next; 366 struct in_addr addr; 367 } *seen, *sp; 368 int answered = 0; 369 int cc; 370 fd_set bits; 371 struct timeval now, delay; 372 struct sockaddr_in from; 373 int fromlen; 374 MD5_CTX md5_ctx; 375 376 377 OMSG.rip_cmd = (pflag) ? RIPCMD_POLL : RIPCMD_REQUEST; 378 if (ripv2) { 379 OMSG.rip_vers = RIPv2; 380 if (auth_type == RIP_AUTH_PW) { 381 OMSG.rip_nets[1] = OMSG.rip_nets[0]; 382 NA0.a_family = RIP_AF_AUTH; 383 NA0.a_type = RIP_AUTH_PW; 384 memcpy(NA0.au.au_pw, passwd, RIP_AUTH_PW_LEN); 385 omsg_len += sizeof(OMSG.rip_nets[0]); 386 387 } else if (auth_type == RIP_AUTH_MD5) { 388 OMSG.rip_nets[1] = OMSG.rip_nets[0]; 389 NA0.a_family = RIP_AF_AUTH; 390 NA0.a_type = RIP_AUTH_MD5; 391 NA0.au.a_md5.md5_keyid = (int8_t)keyid; 392 NA0.au.a_md5.md5_auth_len = RIP_AUTH_MD5_LEN; 393 NA0.au.a_md5.md5_seqno = 0; 394 cc = (char *)&NA2-(char *)&OMSG; 395 NA0.au.a_md5.md5_pkt_len = htons(cc); 396 NA2.a_family = RIP_AF_AUTH; 397 NA2.a_type = htons(1); 398 MD5Init(&md5_ctx); 399 MD5Update(&md5_ctx, 400 (u_char *)&OMSG, cc); 401 MD5Update(&md5_ctx, 402 (u_char *)passwd, RIP_AUTH_MD5_LEN); 403 MD5Final(NA2.au.au_pw, &md5_ctx); 404 omsg_len += 2*sizeof(OMSG.rip_nets[0]); 405 } 406 407 } else { 408 OMSG.rip_vers = RIPv1; 409 OMSG.rip_nets[0].n_mask = 0; 410 } 411 412 /* ask the first (valid) host */ 413 seen = 0; 414 while (0 > out(*argv++)) { 415 if (*argv == 0) 416 exit(-1); 417 answered++; 418 } 419 420 FD_ZERO(&bits); 421 for (;;) { 422 FD_SET(soc, &bits); 423 delay.tv_sec = 0; 424 delay.tv_usec = STIME; 425 cc = select(soc+1, &bits, 0,0, &delay); 426 if (cc > 0) { 427 fromlen = sizeof(from); 428 cc = recvfrom(soc, imsg_buf.packet, 429 sizeof(imsg_buf.packet), 0, 430 (struct sockaddr *)&from, &fromlen); 431 if (cc < 0) { 432 perror("recvfrom"); 433 exit(1); 434 } 435 /* count the distinct responding hosts. 436 * You cannot match responding hosts with 437 * addresses to which queries were transmitted, 438 * because a router might respond with a 439 * different source address. 440 */ 441 for (sp = seen; sp != 0; sp = sp->next) { 442 if (sp->addr.s_addr == from.sin_addr.s_addr) 443 break; 444 } 445 if (sp == 0) { 446 sp = malloc(sizeof(*sp)); 447 if (sp == 0) { 448 fprintf(stderr, 449 "rtquery: malloc failed\n"); 450 exit(1); 451 } 452 sp->addr = from.sin_addr; 453 sp->next = seen; 454 seen = sp; 455 answered++; 456 } 457 458 rip_input(&from, cc); 459 continue; 460 } 461 462 if (cc < 0) { 463 if (errno == EINTR) 464 continue; 465 perror("select"); 466 exit(1); 467 } 468 469 /* After a pause in responses, probe another host. 470 * This reduces the intermingling of answers. 471 */ 472 while (*argv != 0 && 0 > out(*argv++)) 473 answered++; 474 475 /* continue until no more packets arrive 476 * or we have heard from all hosts 477 */ 478 if (answered >= argc) 479 break; 480 481 /* or until we have waited a long time 482 */ 483 if (gettimeofday(&now, 0) < 0) { 484 perror("gettimeofday(now)"); 485 exit(1); 486 } 487 if (sent.tv_sec + wtime <= now.tv_sec) 488 break; 489 } 490 491 /* fail if there was no answer */ 492 exit (answered >= argc ? 0 : 1); 493 } 494 495 496 /* send to one host 497 */ 498 static int 499 out(const char *host) 500 { 501 struct sockaddr_in router; 502 struct hostent *hp; 503 504 if (gettimeofday(&sent, 0) < 0) { 505 perror("gettimeofday(sent)"); 506 return -1; 507 } 508 509 memset(&router, 0, sizeof(router)); 510 router.sin_family = AF_INET; 511 #ifdef _HAVE_SIN_LEN 512 router.sin_len = sizeof(router); 513 #endif 514 if (!inet_aton(host, &router.sin_addr)) { 515 hp = gethostbyname(host); 516 if (hp == 0) { 517 herror(host); 518 return -1; 519 } 520 memcpy(&router.sin_addr, hp->h_addr, sizeof(router.sin_addr)); 521 } 522 router.sin_port = htons(RIP_PORT); 523 524 if (sendto(soc, &omsg_buf, omsg_len, 0, 525 (struct sockaddr *)&router, sizeof(router)) < 0) { 526 perror(host); 527 return -1; 528 } 529 530 return 0; 531 } 532 533 534 /* 535 * Convert string to printable characters 536 */ 537 static char * 538 qstring(u_char *s, int len) 539 { 540 static char buf[8*20+1]; 541 char *p; 542 u_char *s2, c; 543 544 545 for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) { 546 c = *s++; 547 if (c == '\0') { 548 for (s2 = s+1; s2 < &s[len]; s2++) { 549 if (*s2 != '\0') 550 break; 551 } 552 if (s2 >= &s[len]) 553 goto exit; 554 } 555 556 if (c >= ' ' && c < 0x7f && c != '\\') { 557 *p++ = c; 558 continue; 559 } 560 *p++ = '\\'; 561 switch (c) { 562 case '\\': 563 *p++ = '\\'; 564 break; 565 case '\n': 566 *p++= 'n'; 567 break; 568 case '\r': 569 *p++= 'r'; 570 break; 571 case '\t': 572 *p++ = 't'; 573 break; 574 case '\b': 575 *p++ = 'b'; 576 break; 577 default: 578 p += sprintf(p,"%o",c); 579 break; 580 } 581 } 582 exit: 583 *p = '\0'; 584 return buf; 585 } 586 587 588 /* 589 * Handle an incoming RIP packet. 590 */ 591 static void 592 rip_input(struct sockaddr_in *from, 593 int size) 594 { 595 struct netinfo *n, *lim; 596 struct in_addr in; 597 const char *name; 598 char net_buf[80]; 599 u_char hash[RIP_AUTH_MD5_LEN]; 600 MD5_CTX md5_ctx; 601 u_char md5_authed = 0; 602 u_int mask, dmask; 603 char *sp; 604 int i; 605 struct hostent *hp; 606 struct netent *np; 607 struct netauth *na; 608 609 610 if (nflag) { 611 printf("%s:", inet_ntoa(from->sin_addr)); 612 } else { 613 hp = gethostbyaddr(&from->sin_addr, sizeof(struct in_addr), 614 AF_INET); 615 if (hp == 0) { 616 printf("%s:", 617 inet_ntoa(from->sin_addr)); 618 } else { 619 printf("%s (%s):", hp->h_name, 620 inet_ntoa(from->sin_addr)); 621 } 622 } 623 if (IMSG.rip_cmd != RIPCMD_RESPONSE) { 624 printf("\n unexpected response type %d\n", IMSG.rip_cmd); 625 return; 626 } 627 printf(" RIPv%d%s %d bytes\n", IMSG.rip_vers, 628 (IMSG.rip_vers != RIPv1 && IMSG.rip_vers != RIPv2) ? " ?" : "", 629 size); 630 if (size > MAXPACKETSIZE) { 631 if (size > (int)sizeof(imsg_buf) - (int)sizeof(*n)) { 632 printf(" at least %d bytes too long\n", 633 size-MAXPACKETSIZE); 634 size = (int)sizeof(imsg_buf) - (int)sizeof(*n); 635 } else { 636 printf(" %d bytes too long\n", 637 size-MAXPACKETSIZE); 638 } 639 } else if (size%sizeof(*n) != sizeof(struct rip)%sizeof(*n)) { 640 printf(" response of bad length=%d\n", size); 641 } 642 643 n = IMSG.rip_nets; 644 lim = (struct netinfo *)((char*)n + size) - 1; 645 for (; n <= lim; n++) { 646 name = ""; 647 if (n->n_family == RIP_AF_INET) { 648 in.s_addr = n->n_dst; 649 strcpy(net_buf, inet_ntoa(in)); 650 651 mask = ntohl(n->n_mask); 652 dmask = mask & -mask; 653 if (mask != 0) { 654 sp = &net_buf[strlen(net_buf)]; 655 if (IMSG.rip_vers == RIPv1) { 656 sprintf(sp," mask=%#x ? ",mask); 657 mask = 0; 658 } else if (mask + dmask == 0) { 659 for (i = 0; 660 (i != 32 661 && ((1<<i)&mask) == 0); 662 i++) 663 continue; 664 sprintf(sp, "/%d",32-i); 665 } else { 666 sprintf(sp," (mask %#x)", mask); 667 } 668 } 669 670 if (!nflag) { 671 if (mask == 0) { 672 mask = std_mask(in.s_addr); 673 if ((ntohl(in.s_addr) & ~mask) != 0) 674 mask = 0; 675 } 676 /* Without a netmask, do not worry about 677 * whether the destination is a host or a 678 * network. Try both and use the first name 679 * we get. 680 * 681 * If we have a netmask we can make a 682 * good guess. 683 */ 684 if ((in.s_addr & ~mask) == 0) { 685 np = getnetbyaddr((long)in.s_addr, 686 AF_INET); 687 if (np != 0) 688 name = np->n_name; 689 else if (in.s_addr == 0) 690 name = "default"; 691 } 692 if (name[0] == '\0' 693 && ((in.s_addr & ~mask) != 0 694 || mask == 0xffffffff)) { 695 hp = gethostbyaddr(&in, sizeof(in), 696 AF_INET); 697 if (hp != 0) 698 name = hp->h_name; 699 } 700 } 701 702 } else if (n->n_family == RIP_AF_AUTH) { 703 na = (struct netauth*)n; 704 if (na->a_type == RIP_AUTH_PW 705 && n == IMSG.rip_nets) { 706 printf(" Password Authentication: \"%s\"\n", 707 qstring(na->au.au_pw, RIP_AUTH_PW_LEN)); 708 continue; 709 } 710 711 if (na->a_type == RIP_AUTH_MD5 712 && n == IMSG.rip_nets) { 713 printf(" MD5 Auth" 714 " len=%d KeyID=%d" 715 " auth_len=%d" 716 " seqno=%#x" 717 " rsvd=%#x,%#x\n", 718 ntohs(na->au.a_md5.md5_pkt_len), 719 na->au.a_md5.md5_keyid, 720 na->au.a_md5.md5_auth_len, 721 (int)ntohl(na->au.a_md5.md5_seqno), 722 na->au.a_md5.rsvd[0], 723 na->au.a_md5.rsvd[1]); 724 md5_authed = 1; 725 continue; 726 } 727 printf(" Authentication type %d: ", ntohs(na->a_type)); 728 for (i = 0; i < (int)sizeof(na->au.au_pw); i++) 729 printf("%02x ", na->au.au_pw[i]); 730 putc('\n', stdout); 731 if (md5_authed && n+1 > lim 732 && na->a_type == ntohs(1)) { 733 MD5Init(&md5_ctx); 734 MD5Update(&md5_ctx, (u_char *)&IMSG, 735 (char *)na-(char *)&IMSG); 736 MD5Update(&md5_ctx, (u_char *)passwd, 737 RIP_AUTH_MD5_LEN); 738 MD5Final(hash, &md5_ctx); 739 printf(" %s hash\n", 740 memcmp(hash, na->au.au_pw, sizeof(hash)) 741 ? "WRONG" : "correct"); 742 } 743 continue; 744 745 } else { 746 sprintf(net_buf, "(af %#x) %d.%d.%d.%d", 747 ntohs(n->n_family), 748 (char)(n->n_dst >> 24), 749 (char)(n->n_dst >> 16), 750 (char)(n->n_dst >> 8), 751 (char)n->n_dst); 752 } 753 754 printf(" %-18s metric %2d %-10s", 755 net_buf, (int)ntohl(n->n_metric), name); 756 757 if (n->n_nhop != 0) { 758 in.s_addr = n->n_nhop; 759 if (nflag) 760 hp = 0; 761 else 762 hp = gethostbyaddr(&in, sizeof(in), AF_INET); 763 printf(" nhop=%-15s%s", 764 (hp != 0) ? hp->h_name : inet_ntoa(in), 765 (IMSG.rip_vers == RIPv1) ? " ?" : ""); 766 } 767 if (n->n_tag != 0) 768 printf(" tag=%#x%s", n->n_tag, 769 (IMSG.rip_vers == RIPv1) ? " ?" : ""); 770 putc('\n', stdout); 771 } 772 } 773 774 775 /* Return the classical netmask for an IP address. 776 */ 777 static u_int 778 std_mask(u_int addr) /* in network order */ 779 { 780 addr = ntohl(addr); /* was a host, not a network */ 781 782 if (addr == 0) /* default route has mask 0 */ 783 return 0; 784 if (IN_CLASSA(addr)) 785 return IN_CLASSA_NET; 786 if (IN_CLASSB(addr)) 787 return IN_CLASSB_NET; 788 return IN_CLASSC_NET; 789 } 790 791 792 /* get a network number as a name or a number, with an optional "/xx" 793 * netmask. 794 */ 795 static int /* 0=bad */ 796 getnet(char *name, 797 struct netinfo *rt) 798 { 799 int i; 800 struct netent *nentp; 801 u_int mask; 802 struct in_addr in; 803 char hname[MAXHOSTNAMELEN+1]; 804 char *mname, *p; 805 806 807 /* Detect and separate "1.2.3.4/24" 808 */ 809 if (0 != (mname = strrchr(name,'/'))) { 810 i = (int)(mname - name); 811 if (i > (int)sizeof(hname)-1) /* name too long */ 812 return 0; 813 memmove(hname, name, i); 814 hname[i] = '\0'; 815 mname++; 816 name = hname; 817 } 818 819 nentp = getnetbyname(name); 820 if (nentp != 0) { 821 in.s_addr = nentp->n_net; 822 } else if (inet_aton(name, &in) == 1) { 823 in.s_addr = ntohl(in.s_addr); 824 } else { 825 return 0; 826 } 827 828 if (mname == 0) { 829 mask = std_mask(in.s_addr); 830 if ((~mask & in.s_addr) != 0) 831 mask = 0xffffffff; 832 } else { 833 mask = (u_int)strtoul(mname, &p, 0); 834 if (*p != '\0' || mask > 32) 835 return 0; 836 mask = 0xffffffff << (32-mask); 837 } 838 839 rt->n_dst = htonl(in.s_addr); 840 rt->n_family = RIP_AF_INET; 841 rt->n_mask = htonl(mask); 842 return 1; 843 } 844 845 846 /* strtok(), but honoring backslash 847 */ 848 static int /* -1=bad */ 849 parse_quote(char **linep, 850 const char *delims, 851 char *delimp, 852 char *buf, 853 int lim) 854 { 855 char c, *pc; 856 const char *p; 857 858 859 pc = *linep; 860 if (*pc == '\0') 861 return -1; 862 863 for (;;) { 864 if (lim == 0) 865 return -1; 866 c = *pc++; 867 if (c == '\0') 868 break; 869 870 if (c == '\\' && *pc != '\0') { 871 if ((c = *pc++) == 'n') { 872 c = '\n'; 873 } else if (c == 'r') { 874 c = '\r'; 875 } else if (c == 't') { 876 c = '\t'; 877 } else if (c == 'b') { 878 c = '\b'; 879 } else if (c >= '0' && c <= '7') { 880 c -= '0'; 881 if (*pc >= '0' && *pc <= '7') { 882 c = (c<<3)+(*pc++ - '0'); 883 if (*pc >= '0' && *pc <= '7') 884 c = (c<<3)+(*pc++ - '0'); 885 } 886 } 887 888 } else { 889 for (p = delims; *p != '\0'; ++p) { 890 if (*p == c) 891 goto exit; 892 } 893 } 894 895 *buf++ = c; 896 --lim; 897 } 898 exit: 899 if (delimp != 0) 900 *delimp = c; 901 *linep = pc-1; 902 if (lim != 0) 903 *buf = '\0'; 904 return 0; 905 } 906