rtquery.c revision 1.18 1 /* $NetBSD: rtquery.c,v 1.18 2006/05/10 21:53:15 mrg 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 __attribute__((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\n"
64 "The Regents of the University of California."
65 " All rights reserved.\n");
66 #ifdef __NetBSD__
67 __RCSID("$NetBSD: rtquery.c,v 1.18 2006/05/10 21:53:15 mrg Exp $");
68 #elif defined(__FreeBSD__)
69 __RCSID("$FreeBSD$");
70 #else
71 __RCSID("Revision: 2.26 ");
72 #ident "Revision: 2.26 "
73 #endif
74
75 #ifndef sgi
76 #define _HAVE_SIN_LEN
77 #endif
78
79 #ifdef __NetBSD__
80 #include <md5.h>
81 #else
82 #define MD5_DIGEST_LEN 16
83 typedef struct {
84 u_int32_t state[4]; /* state (ABCD) */
85 u_int32_t count[2]; /* # of bits, modulo 2^64 (LSB 1st) */
86 unsigned char buffer[64]; /* input buffer */
87 } MD5_CTX;
88 extern void MD5Init(MD5_CTX*);
89 extern void MD5Update(MD5_CTX*, u_char*, u_int);
90 extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*);
91 #endif
92
93
94 #define WTIME 15 /* Time to wait for all responses */
95 #define STIME (250*1000) /* usec to wait for another response */
96
97 int soc;
98
99 const char *pgmname;
100
101 union {
102 struct rip rip;
103 char packet[MAXPACKETSIZE+MAXPATHLEN];
104 } omsg_buf;
105 #define OMSG omsg_buf.rip
106 int omsg_len = sizeof(struct rip);
107
108 union {
109 struct rip rip;
110 char packet[MAXPACKETSIZE+1024];
111 } imsg_buf;
112 #define IMSG imsg_buf.rip
113
114 int nflag; /* numbers, no names */
115 int pflag; /* play the `gated` game */
116 int ripv2 = 1; /* use RIP version 2 */
117 int wtime = WTIME;
118 int rflag; /* 1=ask about a particular route */
119 int trace, not_trace; /* send trace command or not */
120 int auth_type = RIP_AUTH_NONE;
121 char passwd[RIP_AUTH_PW_LEN];
122 u_long keyid;
123
124 struct timeval sent; /* when query sent */
125
126 static char localhost_str[] = "localhost";
127 static char *default_argv[] = {localhost_str, 0};
128
129 static void rip_input(struct sockaddr_in*, int);
130 static int out(const char *);
131 static void trace_loop(char *argv[]) __attribute((__noreturn__));
132 static void query_loop(char *argv[], int) __attribute((__noreturn__));
133 static int getnet(char *, struct netinfo *);
134 static u_int std_mask(u_int);
135 static int parse_quote(char **, const char *, char *, char *, int);
136 static void usage(void);
137
138
139 int
140 main(int argc,
141 char *argv[])
142 {
143 int ch, bsize;
144 char *p, *options, *value, delim;
145 const char *result;
146
147 delim = 0; /* XXX gcc */
148
149 OMSG.rip_nets[0].n_dst = RIP_DEFAULT;
150 OMSG.rip_nets[0].n_family = RIP_AF_UNSPEC;
151 OMSG.rip_nets[0].n_metric = htonl(HOPCNT_INFINITY);
152
153 pgmname = argv[0];
154 while ((ch = getopt(argc, argv, "np1w:r:t:a:")) != -1)
155 switch (ch) {
156 case 'n':
157 not_trace = 1;
158 nflag = 1;
159 break;
160
161 case 'p':
162 not_trace = 1;
163 pflag = 1;
164 break;
165
166 case '1':
167 ripv2 = 0;
168 break;
169
170 case 'w':
171 not_trace = 1;
172 wtime = (int)strtoul(optarg, &p, 0);
173 if (*p != '\0'
174 || wtime <= 0)
175 usage();
176 break;
177
178 case 'r':
179 not_trace = 1;
180 if (rflag)
181 usage();
182 rflag = getnet(optarg, &OMSG.rip_nets[0]);
183 if (!rflag) {
184 struct hostent *hp = gethostbyname(optarg);
185 if (hp == 0) {
186 fprintf(stderr, "%s: %s:",
187 pgmname, optarg);
188 herror(0);
189 exit(1);
190 }
191 memcpy(&OMSG.rip_nets[0].n_dst, hp->h_addr,
192 sizeof(OMSG.rip_nets[0].n_dst));
193 OMSG.rip_nets[0].n_family = RIP_AF_INET;
194 OMSG.rip_nets[0].n_mask = -1;
195 rflag = 1;
196 }
197 break;
198
199 case 't':
200 trace = 1;
201 options = optarg;
202 while (*options != '\0') {
203 /* messy complications to make -W -Wall happy */
204 static char on_str[] = "on";
205 static char more_str[] = "more";
206 static char off_str[] = "off";
207 static char dump_str[] = "dump";
208 static char *traceopts[] = {
209 # define TRACE_ON 0
210 on_str,
211 # define TRACE_MORE 1
212 more_str,
213 # define TRACE_OFF 2
214 off_str,
215 # define TRACE_DUMP 3
216 dump_str,
217 0
218 };
219 result = "";
220 switch (getsubopt(&options,traceopts,&value)) {
221 case TRACE_ON:
222 OMSG.rip_cmd = RIPCMD_TRACEON;
223 if (!value
224 || strlen(value) > MAXPATHLEN)
225 usage();
226 result = value;
227 break;
228 case TRACE_MORE:
229 if (value)
230 usage();
231 OMSG.rip_cmd = RIPCMD_TRACEON;
232 break;
233 case TRACE_OFF:
234 if (value)
235 usage();
236 OMSG.rip_cmd = RIPCMD_TRACEOFF;
237 break;
238 case TRACE_DUMP:
239 if (value)
240 usage();
241 OMSG.rip_cmd = RIPCMD_TRACEON;
242 result = "dump/../table";
243 break;
244 default:
245 usage();
246 }
247 strcpy((char*)OMSG.rip_tracefile, result);
248 omsg_len += strlen(result) - sizeof(OMSG.ripun);
249 }
250 break;
251
252 case 'a':
253 not_trace = 1;
254 p = strchr(optarg,'=');
255 if (!p)
256 usage();
257 *p++ = '\0';
258 if (!strcasecmp("passwd",optarg))
259 auth_type = RIP_AUTH_PW;
260 else if (!strcasecmp("md5_passwd",optarg))
261 auth_type = RIP_AUTH_MD5;
262 else
263 usage();
264 if (0 > parse_quote(&p,"|",&delim,
265 passwd, sizeof(passwd)))
266 usage();
267 if (auth_type == RIP_AUTH_MD5
268 && delim == '|') {
269 keyid = strtoul(p+1,&p,0);
270 if (keyid > 255 || *p != '\0')
271 usage();
272 } else if (delim != '\0') {
273 usage();
274 }
275 break;
276
277 default:
278 usage();
279 }
280 argv += optind;
281 argc -= optind;
282 if (not_trace && trace)
283 usage();
284 if (argc == 0) {
285 argc = 1;
286 argv = default_argv;
287 }
288
289 soc = socket(AF_INET, SOCK_DGRAM, 0);
290 if (soc < 0) {
291 perror("socket");
292 exit(2);
293 }
294
295 /* be prepared to receive a lot of routes */
296 for (bsize = 127*1024; ; bsize -= 1024) {
297 if (setsockopt(soc, SOL_SOCKET, SO_RCVBUF,
298 &bsize, sizeof(bsize)) == 0)
299 break;
300 if (bsize <= 4*1024) {
301 perror("setsockopt SO_RCVBUF");
302 break;
303 }
304 }
305
306 if (trace)
307 trace_loop(argv);
308 else
309 query_loop(argv, argc);
310 /* NOTREACHED */
311 return 0;
312 }
313
314
315 static void
316 usage(void)
317 {
318 fprintf(stderr,
319 "usage: rtquery [-np1] [-r tgt_rt] [-w wtime]"
320 " [-a type=passwd] host1 [host2 ...]\n"
321 "\trtquery -t {on=filename|more|off|dump}"
322 " host1 [host2 ...]\n");
323 exit(1);
324 }
325
326
327 /* tell the target hosts about tracing
328 */
329 static void
330 trace_loop(char *argv[])
331 {
332 struct sockaddr_in myaddr;
333 int res;
334
335 if (geteuid() != 0) {
336 (void)fprintf(stderr, "-t requires UID 0\n");
337 exit(1);
338 }
339
340 if (ripv2) {
341 OMSG.rip_vers = RIPv2;
342 } else {
343 OMSG.rip_vers = RIPv1;
344 }
345
346 memset(&myaddr, 0, sizeof(myaddr));
347 myaddr.sin_family = AF_INET;
348 #ifdef _HAVE_SIN_LEN
349 myaddr.sin_len = sizeof(myaddr);
350 #endif
351 myaddr.sin_port = htons(IPPORT_RESERVED-1);
352 while (bind(soc, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) {
353 if (errno != EADDRINUSE
354 || myaddr.sin_port == 0) {
355 perror("bind");
356 exit(2);
357 }
358 myaddr.sin_port = htons(ntohs(myaddr.sin_port)-1);
359 }
360
361 res = 1;
362 while (*argv != 0) {
363 if (out(*argv++) <= 0)
364 res = 0;
365 }
366 exit(res);
367 }
368
369
370 /* query all of the listed hosts
371 */
372 static void
373 query_loop(char *argv[], int argc)
374 {
375 # define NA0 (OMSG.rip_auths[0])
376 # define NA2 (OMSG.rip_auths[2])
377 struct seen {
378 struct seen *next;
379 struct in_addr addr;
380 } *seen, *sp;
381 int answered = 0;
382 int cc;
383 fd_set bits;
384 struct timeval now, delay;
385 struct sockaddr_in from;
386 socklen_t fromlen;
387 MD5_CTX md5_ctx;
388
389
390 OMSG.rip_cmd = (pflag) ? RIPCMD_POLL : RIPCMD_REQUEST;
391 if (ripv2) {
392 OMSG.rip_vers = RIPv2;
393 if (auth_type == RIP_AUTH_PW) {
394 OMSG.rip_nets[1] = OMSG.rip_nets[0];
395 NA0.a_family = RIP_AF_AUTH;
396 NA0.a_type = RIP_AUTH_PW;
397 memcpy(NA0.au.au_pw, passwd, RIP_AUTH_PW_LEN);
398 omsg_len += sizeof(OMSG.rip_nets[0]);
399
400 } else if (auth_type == RIP_AUTH_MD5) {
401 OMSG.rip_nets[1] = OMSG.rip_nets[0];
402 NA0.a_family = RIP_AF_AUTH;
403 NA0.a_type = RIP_AUTH_MD5;
404 NA0.au.a_md5.md5_keyid = (int8_t)keyid;
405 NA0.au.a_md5.md5_auth_len = RIP_AUTH_MD5_KEY_LEN;
406 NA0.au.a_md5.md5_seqno = 0;
407 cc = (char *)&NA2-(char *)&OMSG;
408 NA0.au.a_md5.md5_pkt_len = htons(cc);
409 NA2.a_family = RIP_AF_AUTH;
410 NA2.a_type = htons(1);
411 MD5Init(&md5_ctx);
412 MD5Update(&md5_ctx,
413 (u_char *)&OMSG, cc);
414 MD5Update(&md5_ctx,
415 (u_char *)passwd, RIP_AUTH_MD5_HASH_LEN);
416 MD5Final(NA2.au.au_pw, &md5_ctx);
417 omsg_len += 2*sizeof(OMSG.rip_nets[0]);
418 }
419
420 } else {
421 OMSG.rip_vers = RIPv1;
422 OMSG.rip_nets[0].n_mask = 0;
423 }
424
425 /* ask the first (valid) host */
426 seen = 0;
427 while (0 > out(*argv++)) {
428 if (*argv == 0)
429 exit(1);
430 answered++;
431 }
432
433 FD_ZERO(&bits);
434 for (;;) {
435 FD_SET(soc, &bits);
436 delay.tv_sec = 0;
437 delay.tv_usec = STIME;
438 cc = select(soc+1, &bits, 0,0, &delay);
439 if (cc > 0) {
440 fromlen = sizeof(from);
441 cc = recvfrom(soc, imsg_buf.packet,
442 sizeof(imsg_buf.packet), 0,
443 (struct sockaddr *)&from, &fromlen);
444 if (cc < 0) {
445 perror("recvfrom");
446 exit(1);
447 }
448 /* count the distinct responding hosts.
449 * You cannot match responding hosts with
450 * addresses to which queries were transmitted,
451 * because a router might respond with a
452 * different source address.
453 */
454 for (sp = seen; sp != 0; sp = sp->next) {
455 if (sp->addr.s_addr == from.sin_addr.s_addr)
456 break;
457 }
458 if (sp == 0) {
459 sp = malloc(sizeof(*sp));
460 if (sp == 0) {
461 fprintf(stderr,
462 "rtquery: malloc failed\n");
463 exit(1);
464 }
465 sp->addr = from.sin_addr;
466 sp->next = seen;
467 seen = sp;
468 answered++;
469 }
470
471 rip_input(&from, cc);
472 continue;
473 }
474
475 if (cc < 0) {
476 if (errno == EINTR)
477 continue;
478 perror("select");
479 exit(1);
480 }
481
482 /* After a pause in responses, probe another host.
483 * This reduces the intermingling of answers.
484 */
485 while (*argv != 0 && 0 > out(*argv++))
486 answered++;
487
488 /* continue until no more packets arrive
489 * or we have heard from all hosts
490 */
491 if (answered >= argc)
492 break;
493
494 /* or until we have waited a long time
495 */
496 if (gettimeofday(&now, 0) < 0) {
497 perror("gettimeofday(now)");
498 exit(1);
499 }
500 if (sent.tv_sec + wtime <= now.tv_sec)
501 break;
502 }
503
504 /* fail if there was no answer */
505 exit (answered >= argc ? 0 : 1);
506 }
507
508
509 /* send to one host
510 */
511 static int
512 out(const char *host)
513 {
514 struct sockaddr_in router;
515 struct hostent *hp;
516
517 if (gettimeofday(&sent, 0) < 0) {
518 perror("gettimeofday(sent)");
519 return -1;
520 }
521
522 memset(&router, 0, sizeof(router));
523 router.sin_family = AF_INET;
524 #ifdef _HAVE_SIN_LEN
525 router.sin_len = sizeof(router);
526 #endif
527 if (!inet_aton(host, &router.sin_addr)) {
528 hp = gethostbyname(host);
529 if (hp == 0) {
530 herror(host);
531 return -1;
532 }
533 memcpy(&router.sin_addr, hp->h_addr, sizeof(router.sin_addr));
534 }
535 router.sin_port = htons(RIP_PORT);
536
537 if (sendto(soc, &omsg_buf, omsg_len, 0,
538 (struct sockaddr *)&router, sizeof(router)) < 0) {
539 perror(host);
540 return -1;
541 }
542
543 return 0;
544 }
545
546
547 /*
548 * Convert string to printable characters
549 */
550 static char *
551 qstring(u_char *s, int len)
552 {
553 static char buf[8*20+1];
554 char *p;
555 u_char *s2, c;
556
557
558 for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
559 c = *s++;
560 if (c == '\0') {
561 for (s2 = s+1; s2 < &s[len]; s2++) {
562 if (*s2 != '\0')
563 break;
564 }
565 if (s2 >= &s[len])
566 goto exit;
567 }
568
569 if (c >= ' ' && c < 0x7f && c != '\\') {
570 *p++ = c;
571 continue;
572 }
573 *p++ = '\\';
574 switch (c) {
575 case '\\':
576 *p++ = '\\';
577 break;
578 case '\n':
579 *p++= 'n';
580 break;
581 case '\r':
582 *p++= 'r';
583 break;
584 case '\t':
585 *p++ = 't';
586 break;
587 case '\b':
588 *p++ = 'b';
589 break;
590 default:
591 p += sprintf(p,"%o",c);
592 break;
593 }
594 }
595 exit:
596 *p = '\0';
597 return buf;
598 }
599
600
601 /*
602 * Handle an incoming RIP packet.
603 */
604 static void
605 rip_input(struct sockaddr_in *from,
606 int size)
607 {
608 struct netinfo *n, *lim;
609 struct in_addr in;
610 const char *name;
611 char net_buf[80];
612 u_char hash[RIP_AUTH_MD5_KEY_LEN];
613 MD5_CTX md5_ctx;
614 u_char md5_authed = 0;
615 u_int mask, dmask;
616 char *sp;
617 int i;
618 struct hostent *hp;
619 struct netent *np;
620 struct netauth *na;
621
622
623 if (nflag) {
624 printf("%s:", inet_ntoa(from->sin_addr));
625 } else {
626 hp = gethostbyaddr((char*)&from->sin_addr,
627 sizeof(struct in_addr), AF_INET);
628 if (hp == 0) {
629 printf("%s:",
630 inet_ntoa(from->sin_addr));
631 } else {
632 printf("%s (%s):", hp->h_name,
633 inet_ntoa(from->sin_addr));
634 }
635 }
636 if (IMSG.rip_cmd != RIPCMD_RESPONSE) {
637 printf("\n unexpected response type %d\n", IMSG.rip_cmd);
638 return;
639 }
640 printf(" RIPv%d%s %d bytes\n", IMSG.rip_vers,
641 (IMSG.rip_vers != RIPv1 && IMSG.rip_vers != RIPv2) ? " ?" : "",
642 size);
643 if (size > MAXPACKETSIZE) {
644 if (size > (int)sizeof(imsg_buf) - (int)sizeof(*n)) {
645 printf(" at least %d bytes too long\n",
646 size-MAXPACKETSIZE);
647 size = (int)sizeof(imsg_buf) - (int)sizeof(*n);
648 } else {
649 printf(" %d bytes too long\n",
650 size-MAXPACKETSIZE);
651 }
652 } else if (size%sizeof(*n) != sizeof(struct rip)%sizeof(*n)) {
653 printf(" response of bad length=%d\n", size);
654 }
655
656 n = IMSG.rip_nets;
657 lim = (struct netinfo *)((char*)n + size) - 1;
658 for (; n <= lim; n++) {
659 name = "";
660 if (n->n_family == RIP_AF_INET) {
661 in.s_addr = n->n_dst;
662 (void)strcpy(net_buf, inet_ntoa(in));
663
664 mask = ntohl(n->n_mask);
665 dmask = mask & -mask;
666 if (mask != 0) {
667 sp = &net_buf[strlen(net_buf)];
668 if (IMSG.rip_vers == RIPv1) {
669 (void)sprintf(sp," mask=%#x ? ",mask);
670 mask = 0;
671 } else if (mask + dmask == 0) {
672 for (i = 0;
673 (i != 32
674 && ((1<<i)&mask) == 0);
675 i++)
676 continue;
677 (void)sprintf(sp, "/%d",32-i);
678 } else {
679 (void)sprintf(sp," (mask %#x)", mask);
680 }
681 }
682
683 if (!nflag) {
684 if (mask == 0) {
685 mask = std_mask(in.s_addr);
686 if ((ntohl(in.s_addr) & ~mask) != 0)
687 mask = 0;
688 }
689 /* Without a netmask, do not worry about
690 * whether the destination is a host or a
691 * network. Try both and use the first name
692 * we get.
693 *
694 * If we have a netmask we can make a
695 * good guess.
696 */
697 if ((in.s_addr & ~mask) == 0) {
698 np = getnetbyaddr((long)in.s_addr,
699 AF_INET);
700 if (np != 0)
701 name = np->n_name;
702 else if (in.s_addr == 0)
703 name = "default";
704 }
705 if (name[0] == '\0'
706 && ((in.s_addr & ~mask) != 0
707 || mask == 0xffffffff)) {
708 hp = gethostbyaddr((char*)&in,
709 sizeof(in),
710 AF_INET);
711 if (hp != 0)
712 name = hp->h_name;
713 }
714 }
715
716 } else if (n->n_family == RIP_AF_AUTH) {
717 na = (struct netauth*)n;
718 if (na->a_type == RIP_AUTH_PW
719 && n == IMSG.rip_nets) {
720 (void)printf(" Password Authentication:"
721 " \"%s\"\n",
722 qstring(na->au.au_pw,
723 RIP_AUTH_PW_LEN));
724 continue;
725 }
726
727 if (na->a_type == RIP_AUTH_MD5
728 && n == IMSG.rip_nets) {
729 (void)printf(" MD5 Auth"
730 " len=%d KeyID=%d"
731 " auth_len=%d"
732 " seqno=%#x"
733 " rsvd=%#x,%#x\n",
734 ntohs(na->au.a_md5.md5_pkt_len),
735 na->au.a_md5.md5_keyid,
736 na->au.a_md5.md5_auth_len,
737 (int)ntohl(na->au.a_md5.md5_seqno),
738 na->au.a_md5.rsvd[0],
739 na->au.a_md5.rsvd[1]);
740 md5_authed = 1;
741 continue;
742 }
743 (void)printf(" Authentication type %d: ",
744 ntohs(na->a_type));
745 for (i = 0; i < (int)sizeof(na->au.au_pw); i++)
746 (void)printf("%02x ", na->au.au_pw[i]);
747 putc('\n', stdout);
748 if (md5_authed && n+1 > lim
749 && na->a_type == ntohs(1)) {
750 MD5Init(&md5_ctx);
751 MD5Update(&md5_ctx, (u_char *)&IMSG,
752 (char *)na-(char *)&IMSG
753 +RIP_AUTH_MD5_HASH_XTRA);
754 MD5Update(&md5_ctx, (u_char *)passwd,
755 RIP_AUTH_MD5_KEY_LEN);
756 MD5Final(hash, &md5_ctx);
757 (void)printf(" %s hash\n",
758 memcmp(hash, na->au.au_pw,
759 sizeof(hash))
760 ? "WRONG" : "correct");
761 }
762 continue;
763
764 } else {
765 (void)sprintf(net_buf, "(af %#x) %d.%d.%d.%d",
766 ntohs(n->n_family),
767 (u_char)(n->n_dst >> 24),
768 (u_char)(n->n_dst >> 16),
769 (u_char)(n->n_dst >> 8),
770 (u_char)n->n_dst);
771 }
772
773 (void)printf(" %-18s metric %2d %-10s",
774 net_buf, (int)ntohl(n->n_metric), name);
775
776 if (n->n_nhop != 0) {
777 in.s_addr = n->n_nhop;
778 if (nflag)
779 hp = 0;
780 else
781 hp = gethostbyaddr((char*)&in, sizeof(in),
782 AF_INET);
783 (void)printf(" nhop=%-15s%s",
784 (hp != 0) ? hp->h_name : inet_ntoa(in),
785 (IMSG.rip_vers == RIPv1) ? " ?" : "");
786 }
787 if (n->n_tag != 0)
788 (void)printf(" tag=%#x%s", n->n_tag,
789 (IMSG.rip_vers == RIPv1) ? " ?" : "");
790 putc('\n', stdout);
791 }
792 }
793
794
795 /* Return the classical netmask for an IP address.
796 */
797 static u_int
798 std_mask(u_int addr) /* in network order */
799 {
800 NTOHL(addr); /* was a host, not a network */
801
802 if (addr == 0) /* default route has mask 0 */
803 return 0;
804 if (IN_CLASSA(addr))
805 return IN_CLASSA_NET;
806 if (IN_CLASSB(addr))
807 return IN_CLASSB_NET;
808 return IN_CLASSC_NET;
809 }
810
811
812 /* get a network number as a name or a number, with an optional "/xx"
813 * netmask.
814 */
815 static int /* 0=bad */
816 getnet(char *name,
817 struct netinfo *rt)
818 {
819 int i;
820 struct netent *nentp;
821 u_int mask;
822 struct in_addr in;
823 char hname[MAXHOSTNAMELEN+1];
824 char *mname, *p;
825
826
827 /* Detect and separate "1.2.3.4/24"
828 */
829 if (0 != (mname = strrchr(name,'/'))) {
830 i = (int)(mname - name);
831 if (i > (int)sizeof(hname)-1) /* name too long */
832 return 0;
833 memmove(hname, name, i);
834 hname[i] = '\0';
835 mname++;
836 name = hname;
837 }
838
839 nentp = getnetbyname(name);
840 if (nentp != 0) {
841 in.s_addr = nentp->n_net;
842 } else if (inet_aton(name, &in) == 1) {
843 NTOHL(in.s_addr);
844 } else {
845 return 0;
846 }
847
848 if (mname == 0) {
849 mask = std_mask(in.s_addr);
850 if ((~mask & in.s_addr) != 0)
851 mask = 0xffffffff;
852 } else {
853 mask = (u_int)strtoul(mname, &p, 0);
854 if (*p != '\0' || mask > 32)
855 return 0;
856 mask = 0xffffffff << (32-mask);
857 }
858
859 rt->n_dst = htonl(in.s_addr);
860 rt->n_family = RIP_AF_INET;
861 rt->n_mask = htonl(mask);
862 return 1;
863 }
864
865
866 /* strtok(), but honoring backslash
867 */
868 static int /* -1=bad */
869 parse_quote(char **linep,
870 const char *delims,
871 char *delimp,
872 char *buf,
873 int lim)
874 {
875 char c, *pc;
876 const char *p;
877
878
879 pc = *linep;
880 if (*pc == '\0')
881 return -1;
882
883 for (;;) {
884 if (lim == 0)
885 return -1;
886 c = *pc++;
887 if (c == '\0')
888 break;
889
890 if (c == '\\' && *pc != '\0') {
891 if ((c = *pc++) == 'n') {
892 c = '\n';
893 } else if (c == 'r') {
894 c = '\r';
895 } else if (c == 't') {
896 c = '\t';
897 } else if (c == 'b') {
898 c = '\b';
899 } else if (c >= '0' && c <= '7') {
900 c -= '0';
901 if (*pc >= '0' && *pc <= '7') {
902 c = (c<<3)+(*pc++ - '0');
903 if (*pc >= '0' && *pc <= '7')
904 c = (c<<3)+(*pc++ - '0');
905 }
906 }
907
908 } else {
909 for (p = delims; *p != '\0'; ++p) {
910 if (*p == c)
911 goto exit;
912 }
913 }
914
915 *buf++ = c;
916 --lim;
917 }
918 exit:
919 if (delimp != 0)
920 *delimp = c;
921 *linep = pc-1;
922 if (lim != 0)
923 *buf = '\0';
924 return 0;
925 }
926