1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
5 * Copyright (c) 1998 Bill Paul <wpaul@ctr.columbia.edu>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote
17 * products derived from this software without specific prior written
18 * permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
21 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: stable/12/lib/libc/yp/yplib.c 352615 2019-09-23 07:22:22Z kib $");
35
36 #include "namespace.h"
37 #include "reentrant.h"
38 #include <sys/param.h>
39 #include <sys/socket.h>
40 #include <sys/file.h>
41 #include <sys/uio.h>
42 #include <arpa/inet.h>
43 #include <errno.h>
44 #include <stdio.h>
45 #include <string.h>
46 #include <stdlib.h>
47 #include <unistd.h>
48 #include <rpc/rpc.h>
49 #include <rpc/xdr.h>
50 #include <rpcsvc/yp.h>
51 #include "un-namespace.h"
52 #include "libc_private.h"
53
54 /*
55 * We have to define these here due to clashes between yp_prot.h and
56 * yp.h.
57 */
58
59 #define YPMATCHCACHE
60
61 #ifdef YPMATCHCACHE
62 struct ypmatch_ent {
63 char *ypc_map;
64 keydat ypc_key;
65 valdat ypc_val;
66 time_t ypc_expire_t;
67 struct ypmatch_ent *ypc_next;
68 };
69 #define YPLIB_MAXCACHE 5 /* At most 5 entries */
70 #define YPLIB_EXPIRE 5 /* Expire after 5 seconds */
71 #endif
72
73 struct dom_binding {
74 struct dom_binding *dom_pnext;
75 char dom_domain[YPMAXDOMAIN + 1];
76 struct sockaddr_in dom_server_addr;
77 u_short dom_server_port;
78 int dom_socket;
79 CLIENT *dom_client;
80 u_short dom_local_port; /* now I finally know what this is for. */
81 long dom_vers;
82 #ifdef YPMATCHCACHE
83 struct ypmatch_ent *cache;
84 int ypmatch_cachecnt;
85 #endif
86 };
87
88 #include <rpcsvc/ypclnt.h>
89
90 #ifndef BINDINGDIR
91 #define BINDINGDIR "/var/yp/binding"
92 #endif
93 #define MAX_RETRIES 20
94
95 extern bool_t xdr_domainname(), xdr_ypbind_resp();
96 extern bool_t xdr_ypreq_key(), xdr_ypresp_val();
97 extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val();
98 extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq();
99 extern bool_t xdr_ypresp_master();
100
101 int (*ypresp_allfn)();
102 void *ypresp_data;
103
104 static void _yp_unbind(struct dom_binding *);
105 struct dom_binding *_ypbindlist;
106 static char _yp_domain[MAXHOSTNAMELEN];
107 int _yplib_timeout = 20;
108
109 static mutex_t _ypmutex = MUTEX_INITIALIZER;
110 #define YPLOCK() mutex_lock(&_ypmutex);
111 #define YPUNLOCK() mutex_unlock(&_ypmutex);
112
113 #ifdef YPMATCHCACHE
114 static void
ypmatch_cache_delete(struct dom_binding * ypdb,struct ypmatch_ent * prev,struct ypmatch_ent * cur)115 ypmatch_cache_delete(struct dom_binding *ypdb, struct ypmatch_ent *prev,
116 struct ypmatch_ent *cur)
117 {
118 if (prev == NULL)
119 ypdb->cache = cur->ypc_next;
120 else
121 prev->ypc_next = cur->ypc_next;
122
123 free(cur->ypc_map);
124 free(cur->ypc_key.keydat_val);
125 free(cur->ypc_val.valdat_val);
126 free(cur);
127
128 ypdb->ypmatch_cachecnt--;
129
130 return;
131 }
132
133 static void
ypmatch_cache_flush(struct dom_binding * ypdb)134 ypmatch_cache_flush(struct dom_binding *ypdb)
135 {
136 struct ypmatch_ent *n, *c = ypdb->cache;
137
138 while (c != NULL) {
139 n = c->ypc_next;
140 ypmatch_cache_delete(ypdb, NULL, c);
141 c = n;
142 }
143
144 return;
145 }
146
147 static void
ypmatch_cache_expire(struct dom_binding * ypdb)148 ypmatch_cache_expire(struct dom_binding *ypdb)
149 {
150 struct ypmatch_ent *c = ypdb->cache;
151 struct ypmatch_ent *n, *p = NULL;
152 time_t t;
153
154 time(&t);
155
156 while (c != NULL) {
157 if (t >= c->ypc_expire_t) {
158 n = c->ypc_next;
159 ypmatch_cache_delete(ypdb, p, c);
160 c = n;
161 } else {
162 p = c;
163 c = c->ypc_next;
164 }
165 }
166
167 return;
168 }
169
170 static void
ypmatch_cache_insert(struct dom_binding * ypdb,char * map,keydat * key,valdat * val)171 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, keydat *key,
172 valdat *val)
173 {
174 struct ypmatch_ent *new;
175
176 /* Do an expire run to maybe open up a slot. */
177 if (ypdb->ypmatch_cachecnt)
178 ypmatch_cache_expire(ypdb);
179
180 /*
181 * If there are no slots free, then force an expire of
182 * the least recently used entry.
183 */
184 if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
185 struct ypmatch_ent *o = NULL, *c = ypdb->cache;
186 time_t oldest = 0;
187
188 oldest = ~oldest;
189
190 while (c != NULL) {
191 if (c->ypc_expire_t < oldest) {
192 oldest = c->ypc_expire_t;
193 o = c;
194 }
195 c = c->ypc_next;
196 }
197
198 if (o == NULL)
199 return;
200 o->ypc_expire_t = 0;
201 ypmatch_cache_expire(ypdb);
202 }
203
204 new = malloc(sizeof(struct ypmatch_ent));
205 if (new == NULL)
206 return;
207
208 new->ypc_map = strdup(map);
209 if (new->ypc_map == NULL) {
210 free(new);
211 return;
212 }
213 new->ypc_key.keydat_val = malloc(key->keydat_len);
214 if (new->ypc_key.keydat_val == NULL) {
215 free(new->ypc_map);
216 free(new);
217 return;
218 }
219 new->ypc_val.valdat_val = malloc(val->valdat_len);
220 if (new->ypc_val.valdat_val == NULL) {
221 free(new->ypc_val.valdat_val);
222 free(new->ypc_map);
223 free(new);
224 return;
225 }
226
227 new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
228 new->ypc_key.keydat_len = key->keydat_len;
229 new->ypc_val.valdat_len = val->valdat_len;
230 bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
231 bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
232
233 new->ypc_next = ypdb->cache;
234 ypdb->cache = new;
235
236 ypdb->ypmatch_cachecnt++;
237
238 return;
239 }
240
241 static bool_t
ypmatch_cache_lookup(struct dom_binding * ypdb,char * map,keydat * key,valdat * val)242 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key,
243 valdat *val)
244 {
245 struct ypmatch_ent *c;
246
247 ypmatch_cache_expire(ypdb);
248
249 for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
250 if (strcmp(map, c->ypc_map))
251 continue;
252 if (key->keydat_len != c->ypc_key.keydat_len)
253 continue;
254 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
255 key->keydat_len))
256 continue;
257 }
258
259 if (c == NULL)
260 return(FALSE);
261
262 val->valdat_len = c->ypc_val.valdat_len;
263 val->valdat_val = c->ypc_val.valdat_val;
264
265 return(TRUE);
266 }
267 #endif
268
269 const char *
ypbinderr_string(int incode)270 ypbinderr_string(int incode)
271 {
272 static char err[80];
273 switch (incode) {
274 case 0:
275 return ("Success");
276 case YPBIND_ERR_ERR:
277 return ("Internal ypbind error");
278 case YPBIND_ERR_NOSERV:
279 return ("Domain not bound");
280 case YPBIND_ERR_RESC:
281 return ("System resource allocation failure");
282 }
283 sprintf(err, "Unknown ypbind error: #%d\n", incode);
284 return (err);
285 }
286
287 int
_yp_dobind(char * dom,struct dom_binding ** ypdb)288 _yp_dobind(char *dom, struct dom_binding **ypdb)
289 {
290 static pid_t pid = -1;
291 char path[MAXPATHLEN];
292 struct dom_binding *ysd, *ysd2;
293 struct ypbind_resp ypbr;
294 struct timeval tv;
295 struct sockaddr_in clnt_sin;
296 int clnt_sock, fd;
297 pid_t gpid;
298 CLIENT *client;
299 int new = 0, r;
300 int retries = 0;
301 struct sockaddr_in check;
302 socklen_t checklen = sizeof(struct sockaddr_in);
303
304 /* Not allowed; bad doggie. Bad. */
305 if (strchr(dom, '/') != NULL)
306 return(YPERR_BADARGS);
307
308 gpid = getpid();
309 if (!(pid == -1 || pid == gpid)) {
310 ysd = _ypbindlist;
311 while (ysd) {
312 if (ysd->dom_client != NULL)
313 _yp_unbind(ysd);
314 ysd2 = ysd->dom_pnext;
315 free(ysd);
316 ysd = ysd2;
317 }
318 _ypbindlist = NULL;
319 }
320 pid = gpid;
321
322 if (ypdb != NULL)
323 *ypdb = NULL;
324
325 if (dom == NULL || strlen(dom) == 0)
326 return (YPERR_BADARGS);
327
328 for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
329 if (strcmp(dom, ysd->dom_domain) == 0)
330 break;
331
332
333 if (ysd == NULL) {
334 ysd = (struct dom_binding *)malloc(sizeof *ysd);
335 if (ysd == NULL)
336 return (YPERR_RESRC);
337 bzero((char *)ysd, sizeof *ysd);
338 ysd->dom_socket = -1;
339 ysd->dom_vers = 0;
340 new = 1;
341 } else {
342 /* Check the socket -- may have been hosed by the caller. */
343 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check,
344 &checklen) == -1 || check.sin_family != AF_INET ||
345 check.sin_port != ysd->dom_local_port) {
346 /* Socket became bogus somehow... need to rebind. */
347 int save, sock;
348
349 sock = ysd->dom_socket;
350 save = _dup(ysd->dom_socket);
351 if (ysd->dom_client != NULL)
352 clnt_destroy(ysd->dom_client);
353 ysd->dom_vers = 0;
354 ysd->dom_client = NULL;
355 sock = _dup2(save, sock);
356 _close(save);
357 }
358 }
359
360 again:
361 retries++;
362 if (retries > MAX_RETRIES) {
363 if (new)
364 free(ysd);
365 return(YPERR_YPBIND);
366 }
367 #ifdef BINDINGDIR
368 if (ysd->dom_vers == 0) {
369 /*
370 * We're trying to make a new binding: zorch the
371 * existing handle now (if any).
372 */
373 if (ysd->dom_client != NULL) {
374 clnt_destroy(ysd->dom_client);
375 ysd->dom_client = NULL;
376 ysd->dom_socket = -1;
377 }
378 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
379 if ((fd = _open(path, O_RDONLY | O_CLOEXEC)) == -1) {
380 /* no binding file, YP is dead. */
381 /* Try to bring it back to life. */
382 _close(fd);
383 goto skipit;
384 }
385 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
386 struct iovec iov[2];
387 struct ypbind_resp ybr;
388 u_short ypb_port;
389
390 iov[0].iov_base = (caddr_t)&ypb_port;
391 iov[0].iov_len = sizeof ypb_port;
392 iov[1].iov_base = (caddr_t)&ybr;
393 iov[1].iov_len = sizeof ybr;
394
395 r = _readv(fd, iov, 2);
396 if (r != iov[0].iov_len + iov[1].iov_len) {
397 _close(fd);
398 ysd->dom_vers = -1;
399 goto again;
400 }
401
402 bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
403 ysd->dom_server_addr.sin_family = AF_INET;
404 ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
405 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
406 &ysd->dom_server_addr.sin_addr.s_addr,
407 sizeof(ysd->dom_server_addr.sin_addr.s_addr));
408 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
409 &ysd->dom_server_addr.sin_port,
410 sizeof(ysd->dom_server_addr.sin_port));
411
412 ysd->dom_server_port = ysd->dom_server_addr.sin_port;
413 _close(fd);
414 goto gotit;
415 } else {
416 /* no lock on binding file, YP is dead. */
417 /* Try to bring it back to life. */
418 _close(fd);
419 goto skipit;
420 }
421 }
422 skipit:
423 #endif
424 if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
425 /*
426 * We're trying to make a new binding: zorch the
427 * existing handle now (if any).
428 */
429 if (ysd->dom_client != NULL) {
430 clnt_destroy(ysd->dom_client);
431 ysd->dom_client = NULL;
432 ysd->dom_socket = -1;
433 }
434 bzero((char *)&clnt_sin, sizeof clnt_sin);
435 clnt_sin.sin_family = AF_INET;
436 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
437
438 clnt_sock = RPC_ANYSOCK;
439 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
440 0, 0);
441 if (client == NULL) {
442 /*
443 * These conditions indicate ypbind just isn't
444 * alive -- we probably don't want to shoot our
445 * mouth off in this case; instead generate error
446 * messages only for really exotic problems.
447 */
448 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
449 (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
450 rpc_createerr.cf_error.re_errno == ECONNREFUSED))
451 clnt_pcreateerror("clnttcp_create");
452 if (new)
453 free(ysd);
454 return (YPERR_YPBIND);
455 }
456
457 /*
458 * Check the port number -- should be < IPPORT_RESERVED.
459 * If not, it's possible someone has registered a bogus
460 * ypbind with the portmapper and is trying to trick us.
461 */
462 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
463 if (client != NULL)
464 clnt_destroy(client);
465 if (new)
466 free(ysd);
467 return(YPERR_YPBIND);
468 }
469 tv.tv_sec = _yplib_timeout/2;
470 tv.tv_usec = 0;
471 r = clnt_call(client, YPBINDPROC_DOMAIN,
472 (xdrproc_t)xdr_domainname, &dom,
473 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
474 if (r != RPC_SUCCESS) {
475 clnt_destroy(client);
476 ysd->dom_vers = -1;
477 if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
478 if (new)
479 free(ysd);
480 return(YPERR_YPBIND);
481 }
482 fprintf(stderr,
483 "YP: server for domain %s not responding, retrying\n", dom);
484 goto again;
485 } else {
486 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
487 struct timespec time_to_sleep, time_remaining;
488
489 clnt_destroy(client);
490 ysd->dom_vers = -1;
491
492 time_to_sleep.tv_sec = _yplib_timeout/2;
493 time_to_sleep.tv_nsec = 0;
494 _nanosleep(&time_to_sleep,
495 &time_remaining);
496 goto again;
497 }
498 }
499 clnt_destroy(client);
500
501 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
502 ysd->dom_server_addr.sin_family = AF_INET;
503 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
504 &ysd->dom_server_addr.sin_port,
505 sizeof(ysd->dom_server_addr.sin_port));
506 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
507 &ysd->dom_server_addr.sin_addr.s_addr,
508 sizeof(ysd->dom_server_addr.sin_addr.s_addr));
509
510 /*
511 * We could do a reserved port check here too, but this
512 * could pose compatibility problems. The local ypbind is
513 * supposed to decide whether or not to trust yp servers
514 * on insecure ports. For now, we trust its judgement.
515 */
516 ysd->dom_server_port =
517 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
518 gotit:
519 ysd->dom_vers = YPVERS;
520 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
521 }
522
523 /* Don't rebuild the connection to the server unless we have to. */
524 if (ysd->dom_client == NULL) {
525 tv.tv_sec = _yplib_timeout/2;
526 tv.tv_usec = 0;
527 ysd->dom_socket = RPC_ANYSOCK;
528 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
529 YPPROG, YPVERS, tv, &ysd->dom_socket, 65507, 65507);
530 if (ysd->dom_client == NULL) {
531 clnt_pcreateerror("clntudp_create");
532 ysd->dom_vers = -1;
533 goto again;
534 }
535 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
536 perror("fcntl: F_SETFD");
537 /*
538 * We want a port number associated with this socket
539 * so that we can check its authenticity later.
540 */
541 checklen = sizeof(struct sockaddr_in);
542 bzero((char *)&check, checklen);
543 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
544 check.sin_family = AF_INET;
545 if (!_getsockname(ysd->dom_socket,
546 (struct sockaddr *)&check, &checklen)) {
547 ysd->dom_local_port = check.sin_port;
548 } else {
549 clnt_destroy(ysd->dom_client);
550 if (new)
551 free(ysd);
552 return(YPERR_YPBIND);
553 }
554 }
555
556 if (new) {
557 ysd->dom_pnext = _ypbindlist;
558 _ypbindlist = ysd;
559 }
560
561 /*
562 * Set low retry timeout to realistically handle UDP packet
563 * loss for YP packet bursts.
564 */
565 tv.tv_sec = 1;
566 tv.tv_usec = 0;
567 clnt_control(ysd->dom_client, CLSET_RETRY_TIMEOUT, (char*)&tv);
568
569 if (ypdb != NULL)
570 *ypdb = ysd;
571 return (0);
572 }
573
574 static void
_yp_unbind(struct dom_binding * ypb)575 _yp_unbind(struct dom_binding *ypb)
576 {
577 struct sockaddr_in check;
578 socklen_t checklen = sizeof(struct sockaddr_in);
579
580 if (ypb->dom_client != NULL) {
581 /* Check the socket -- may have been hosed by the caller. */
582 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check,
583 &checklen) == -1 || check.sin_family != AF_INET ||
584 check.sin_port != ypb->dom_local_port) {
585 int save, sock;
586
587 sock = ypb->dom_socket;
588 save = _dup(ypb->dom_socket);
589 clnt_destroy(ypb->dom_client);
590 sock = _dup2(save, sock);
591 _close(save);
592 } else
593 clnt_destroy(ypb->dom_client);
594 }
595
596 ypb->dom_client = NULL;
597 ypb->dom_socket = -1;
598 ypb->dom_vers = -1;
599 #ifdef YPMATCHCACHE
600 ypmatch_cache_flush(ypb);
601 #endif
602 }
603
604 static int
yp_bind_locked(char * dom)605 yp_bind_locked(char *dom)
606 {
607 return (_yp_dobind(dom, NULL));
608 }
609
610 int
yp_bind(char * dom)611 yp_bind(char *dom)
612 {
613 int r;
614
615 YPLOCK();
616 r = yp_bind_locked(dom);
617 YPUNLOCK();
618 return (r);
619 }
620
621 static void
yp_unbind_locked(char * dom)622 yp_unbind_locked(char *dom)
623 {
624 struct dom_binding *ypb, *ypbp;
625
626 ypbp = NULL;
627 for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
628 if (strcmp(dom, ypb->dom_domain) == 0) {
629 _yp_unbind(ypb);
630 if (ypbp)
631 ypbp->dom_pnext = ypb->dom_pnext;
632 else
633 _ypbindlist = ypb->dom_pnext;
634 free(ypb);
635 return;
636 }
637 ypbp = ypb;
638 }
639 return;
640 }
641
642 void
yp_unbind(char * dom)643 yp_unbind(char *dom)
644 {
645 YPLOCK();
646 yp_unbind_locked(dom);
647 YPUNLOCK();
648 }
649
650 int
yp_match(char * indomain,char * inmap,const char * inkey,int inkeylen,char ** outval,int * outvallen)651 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
652 char **outval, int *outvallen)
653 {
654 struct dom_binding *ysd;
655 struct ypresp_val yprv;
656 struct timeval tv;
657 struct ypreq_key yprk;
658 int r;
659 int retries = 0;
660 *outval = NULL;
661 *outvallen = 0;
662
663 /* Sanity check */
664
665 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
666 inmap == NULL || !strlen(inmap) ||
667 indomain == NULL || !strlen(indomain))
668 return (YPERR_BADARGS);
669
670 YPLOCK();
671 if (_yp_dobind(indomain, &ysd) != 0) {
672 YPUNLOCK();
673 return(YPERR_DOMAIN);
674 }
675
676 yprk.domain = indomain;
677 yprk.map = inmap;
678 yprk.key.keydat_val = (char *)inkey;
679 yprk.key.keydat_len = inkeylen;
680
681 #ifdef YPMATCHCACHE
682 if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
683 /*
684 if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
685 inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
686 */
687 *outvallen = yprv.val.valdat_len;
688 *outval = (char *)malloc(*outvallen+1);
689 if (*outval == NULL) {
690 _yp_unbind(ysd);
691 *outvallen = 0;
692 YPUNLOCK();
693 return (YPERR_RESRC);
694 }
695 bcopy(yprv.val.valdat_val, *outval, *outvallen);
696 (*outval)[*outvallen] = '\0';
697 YPUNLOCK();
698 return (0);
699 }
700 _yp_unbind(ysd);
701 #endif
702
703 again:
704 if (retries > MAX_RETRIES) {
705 YPUNLOCK();
706 return (YPERR_RPC);
707 }
708
709 if (_yp_dobind(indomain, &ysd) != 0) {
710 YPUNLOCK();
711 return (YPERR_DOMAIN);
712 }
713
714 tv.tv_sec = _yplib_timeout;
715 tv.tv_usec = 0;
716
717 bzero((char *)&yprv, sizeof yprv);
718
719 r = clnt_call(ysd->dom_client, YPPROC_MATCH,
720 (xdrproc_t)xdr_ypreq_key, &yprk,
721 (xdrproc_t)xdr_ypresp_val, &yprv, tv);
722 if (r != RPC_SUCCESS) {
723 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
724 _yp_unbind(ysd);
725 retries++;
726 goto again;
727 }
728
729 if (!(r = ypprot_err(yprv.stat))) {
730 *outvallen = yprv.val.valdat_len;
731 *outval = (char *)malloc(*outvallen+1);
732 if (*outval == NULL) {
733 _yp_unbind(ysd);
734 *outvallen = 0;
735 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
736 YPUNLOCK();
737 return (YPERR_RESRC);
738 }
739 bcopy(yprv.val.valdat_val, *outval, *outvallen);
740 (*outval)[*outvallen] = '\0';
741 #ifdef YPMATCHCACHE
742 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
743 #endif
744 }
745
746 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
747 YPUNLOCK();
748 return (r);
749 }
750
751 static int
yp_get_default_domain_locked(char ** domp)752 yp_get_default_domain_locked(char **domp)
753 {
754 *domp = NULL;
755 if (_yp_domain[0] == '\0')
756 if (getdomainname(_yp_domain, sizeof _yp_domain))
757 return (YPERR_NODOM);
758 *domp = _yp_domain;
759 return (0);
760 }
761
762 int
yp_get_default_domain(char ** domp)763 yp_get_default_domain(char **domp)
764 {
765 int r;
766
767 YPLOCK();
768 r = yp_get_default_domain_locked(domp);
769 YPUNLOCK();
770 return (r);
771 }
772
773 int
yp_first(char * indomain,char * inmap,char ** outkey,int * outkeylen,char ** outval,int * outvallen)774 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen,
775 char **outval, int *outvallen)
776 {
777 struct ypresp_key_val yprkv;
778 struct ypreq_nokey yprnk;
779 struct dom_binding *ysd;
780 struct timeval tv;
781 int r;
782 int retries = 0;
783 /* Sanity check */
784
785 if (indomain == NULL || !strlen(indomain) ||
786 inmap == NULL || !strlen(inmap))
787 return (YPERR_BADARGS);
788
789 *outkey = *outval = NULL;
790 *outkeylen = *outvallen = 0;
791
792 YPLOCK();
793 again:
794 if (retries > MAX_RETRIES) {
795 YPUNLOCK();
796 return (YPERR_RPC);
797 }
798
799 if (_yp_dobind(indomain, &ysd) != 0) {
800 YPUNLOCK();
801 return (YPERR_DOMAIN);
802 }
803
804 tv.tv_sec = _yplib_timeout;
805 tv.tv_usec = 0;
806
807 yprnk.domain = indomain;
808 yprnk.map = inmap;
809 bzero((char *)&yprkv, sizeof yprkv);
810
811 r = clnt_call(ysd->dom_client, YPPROC_FIRST,
812 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
813 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
814 if (r != RPC_SUCCESS) {
815 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
816 _yp_unbind(ysd);
817 retries++;
818 goto again;
819 }
820 if (!(r = ypprot_err(yprkv.stat))) {
821 *outkeylen = yprkv.key.keydat_len;
822 *outkey = (char *)malloc(*outkeylen+1);
823 if (*outkey == NULL) {
824 _yp_unbind(ysd);
825 *outkeylen = 0;
826 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
827 YPUNLOCK();
828 return (YPERR_RESRC);
829 }
830 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
831 (*outkey)[*outkeylen] = '\0';
832 *outvallen = yprkv.val.valdat_len;
833 *outval = (char *)malloc(*outvallen+1);
834 if (*outval == NULL) {
835 free(*outkey);
836 _yp_unbind(ysd);
837 *outkeylen = *outvallen = 0;
838 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
839 YPUNLOCK();
840 return (YPERR_RESRC);
841 }
842 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
843 (*outval)[*outvallen] = '\0';
844 }
845
846 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
847 YPUNLOCK();
848 return (r);
849 }
850
851 int
yp_next(char * indomain,char * inmap,char * inkey,int inkeylen,char ** outkey,int * outkeylen,char ** outval,int * outvallen)852 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen,
853 char **outkey, int *outkeylen, char **outval, int *outvallen)
854 {
855 struct ypresp_key_val yprkv;
856 struct ypreq_key yprk;
857 struct dom_binding *ysd;
858 struct timeval tv;
859 int r;
860 int retries = 0;
861 /* Sanity check */
862
863 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
864 inmap == NULL || !strlen(inmap) ||
865 indomain == NULL || !strlen(indomain))
866 return (YPERR_BADARGS);
867
868 *outkey = *outval = NULL;
869 *outkeylen = *outvallen = 0;
870
871 YPLOCK();
872 again:
873 if (retries > MAX_RETRIES) {
874 YPUNLOCK();
875 return (YPERR_RPC);
876 }
877
878 if (_yp_dobind(indomain, &ysd) != 0) {
879 YPUNLOCK();
880 return (YPERR_DOMAIN);
881 }
882
883 tv.tv_sec = _yplib_timeout;
884 tv.tv_usec = 0;
885
886 yprk.domain = indomain;
887 yprk.map = inmap;
888 yprk.key.keydat_val = inkey;
889 yprk.key.keydat_len = inkeylen;
890 bzero((char *)&yprkv, sizeof yprkv);
891
892 r = clnt_call(ysd->dom_client, YPPROC_NEXT,
893 (xdrproc_t)xdr_ypreq_key, &yprk,
894 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
895 if (r != RPC_SUCCESS) {
896 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
897 _yp_unbind(ysd);
898 retries++;
899 goto again;
900 }
901 if (!(r = ypprot_err(yprkv.stat))) {
902 *outkeylen = yprkv.key.keydat_len;
903 *outkey = (char *)malloc(*outkeylen+1);
904 if (*outkey == NULL) {
905 _yp_unbind(ysd);
906 *outkeylen = 0;
907 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
908 YPUNLOCK();
909 return (YPERR_RESRC);
910 }
911 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
912 (*outkey)[*outkeylen] = '\0';
913 *outvallen = yprkv.val.valdat_len;
914 *outval = (char *)malloc(*outvallen+1);
915 if (*outval == NULL) {
916 free(*outkey);
917 _yp_unbind(ysd);
918 *outkeylen = *outvallen = 0;
919 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
920 YPUNLOCK();
921 return (YPERR_RESRC);
922 }
923 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
924 (*outval)[*outvallen] = '\0';
925 }
926
927 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
928 YPUNLOCK();
929 return (r);
930 }
931
932 int
yp_all(char * indomain,char * inmap,struct ypall_callback * incallback)933 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
934 {
935 struct ypreq_nokey yprnk;
936 struct dom_binding *ysd;
937 struct timeval tv;
938 struct sockaddr_in clnt_sin;
939 CLIENT *clnt;
940 u_long status, savstat;
941 int clnt_sock;
942 int retries = 0;
943 /* Sanity check */
944
945 if (indomain == NULL || !strlen(indomain) ||
946 inmap == NULL || !strlen(inmap))
947 return (YPERR_BADARGS);
948
949 YPLOCK();
950 again:
951 if (retries > MAX_RETRIES) {
952 YPUNLOCK();
953 return (YPERR_RPC);
954 }
955
956 if (_yp_dobind(indomain, &ysd) != 0) {
957 YPUNLOCK();
958 return (YPERR_DOMAIN);
959 }
960
961 tv.tv_sec = _yplib_timeout;
962 tv.tv_usec = 0;
963
964 /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
965
966 clnt_sock = RPC_ANYSOCK;
967 clnt_sin = ysd->dom_server_addr;
968 clnt_sin.sin_port = 0;
969 clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
970 if (clnt == NULL) {
971 YPUNLOCK();
972 printf("clnttcp_create failed\n");
973 return (YPERR_PMAP);
974 }
975
976 yprnk.domain = indomain;
977 yprnk.map = inmap;
978 ypresp_allfn = incallback->foreach;
979 ypresp_data = (void *)incallback->data;
980
981 if (clnt_call(clnt, YPPROC_ALL,
982 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
983 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
984 clnt_perror(clnt, "yp_all: clnt_call");
985 clnt_destroy(clnt);
986 _yp_unbind(ysd);
987 retries++;
988 goto again;
989 }
990
991 clnt_destroy(clnt);
992 savstat = status;
993 xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status); /* not really needed... */
994 YPUNLOCK();
995 if (savstat != YP_NOMORE)
996 return (ypprot_err(savstat));
997 return (0);
998 }
999
1000 int
yp_order(char * indomain,char * inmap,int * outorder)1001 yp_order(char *indomain, char *inmap, int *outorder)
1002 {
1003 struct dom_binding *ysd;
1004 struct ypresp_order ypro;
1005 struct ypreq_nokey yprnk;
1006 struct timeval tv;
1007 int r;
1008
1009 /* Sanity check */
1010
1011 if (indomain == NULL || !strlen(indomain) ||
1012 inmap == NULL || !strlen(inmap))
1013 return (YPERR_BADARGS);
1014
1015 YPLOCK();
1016 again:
1017 if (_yp_dobind(indomain, &ysd) != 0) {
1018 YPUNLOCK();
1019 return (YPERR_DOMAIN);
1020 }
1021
1022 tv.tv_sec = _yplib_timeout;
1023 tv.tv_usec = 0;
1024
1025 yprnk.domain = indomain;
1026 yprnk.map = inmap;
1027
1028 bzero((char *)(char *)&ypro, sizeof ypro);
1029
1030 r = clnt_call(ysd->dom_client, YPPROC_ORDER,
1031 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
1032 (xdrproc_t)xdr_ypresp_order, &ypro, tv);
1033
1034 /*
1035 * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
1036 * procedure.
1037 */
1038 if (r == RPC_PROCUNAVAIL) {
1039 YPUNLOCK();
1040 return(YPERR_YPERR);
1041 }
1042
1043 if (r != RPC_SUCCESS) {
1044 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
1045 _yp_unbind(ysd);
1046 goto again;
1047 }
1048
1049 if (!(r = ypprot_err(ypro.stat))) {
1050 *outorder = ypro.ordernum;
1051 }
1052
1053 xdr_free((xdrproc_t)xdr_ypresp_order, &ypro);
1054 YPUNLOCK();
1055 return (r);
1056 }
1057
1058 int
yp_master(char * indomain,char * inmap,char ** outname)1059 yp_master(char *indomain, char *inmap, char **outname)
1060 {
1061 struct dom_binding *ysd;
1062 struct ypresp_master yprm;
1063 struct ypreq_nokey yprnk;
1064 struct timeval tv;
1065 int r;
1066
1067 /* Sanity check */
1068
1069 if (indomain == NULL || !strlen(indomain) ||
1070 inmap == NULL || !strlen(inmap))
1071 return (YPERR_BADARGS);
1072 YPLOCK();
1073 again:
1074 if (_yp_dobind(indomain, &ysd) != 0) {
1075 YPUNLOCK();
1076 return (YPERR_DOMAIN);
1077 }
1078
1079 tv.tv_sec = _yplib_timeout;
1080 tv.tv_usec = 0;
1081
1082 yprnk.domain = indomain;
1083 yprnk.map = inmap;
1084
1085 bzero((char *)&yprm, sizeof yprm);
1086
1087 r = clnt_call(ysd->dom_client, YPPROC_MASTER,
1088 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
1089 (xdrproc_t)xdr_ypresp_master, &yprm, tv);
1090 if (r != RPC_SUCCESS) {
1091 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
1092 _yp_unbind(ysd);
1093 goto again;
1094 }
1095
1096 if (!(r = ypprot_err(yprm.stat))) {
1097 *outname = (char *)strdup(yprm.peer);
1098 }
1099
1100 xdr_free((xdrproc_t)xdr_ypresp_master, &yprm);
1101 YPUNLOCK();
1102 return (r);
1103 }
1104
1105 int
yp_maplist(char * indomain,struct ypmaplist ** outmaplist)1106 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
1107 {
1108 struct dom_binding *ysd;
1109 struct ypresp_maplist ypml;
1110 struct timeval tv;
1111 int r;
1112
1113 /* Sanity check */
1114
1115 if (indomain == NULL || !strlen(indomain))
1116 return (YPERR_BADARGS);
1117
1118 YPLOCK();
1119 again:
1120 if (_yp_dobind(indomain, &ysd) != 0) {
1121 YPUNLOCK();
1122 return (YPERR_DOMAIN);
1123 }
1124
1125 tv.tv_sec = _yplib_timeout;
1126 tv.tv_usec = 0;
1127
1128 bzero((char *)&ypml, sizeof ypml);
1129
1130 r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
1131 (xdrproc_t)xdr_domainname, &indomain,
1132 (xdrproc_t)xdr_ypresp_maplist, &ypml,tv);
1133 if (r != RPC_SUCCESS) {
1134 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
1135 _yp_unbind(ysd);
1136 goto again;
1137 }
1138 if (!(r = ypprot_err(ypml.stat))) {
1139 *outmaplist = ypml.maps;
1140 }
1141
1142 /* NO: xdr_free((xdrproc_t)xdr_ypresp_maplist, &ypml);*/
1143 YPUNLOCK();
1144 return (r);
1145 }
1146
1147 const char *
yperr_string(int incode)1148 yperr_string(int incode)
1149 {
1150 static char err[80];
1151
1152 switch (incode) {
1153 case 0:
1154 return ("Success");
1155 case YPERR_BADARGS:
1156 return ("Request arguments bad");
1157 case YPERR_RPC:
1158 return ("RPC failure");
1159 case YPERR_DOMAIN:
1160 return ("Can't bind to server which serves this domain");
1161 case YPERR_MAP:
1162 return ("No such map in server's domain");
1163 case YPERR_KEY:
1164 return ("No such key in map");
1165 case YPERR_YPERR:
1166 return ("YP server error");
1167 case YPERR_RESRC:
1168 return ("Local resource allocation failure");
1169 case YPERR_NOMORE:
1170 return ("No more records in map database");
1171 case YPERR_PMAP:
1172 return ("Can't communicate with portmapper");
1173 case YPERR_YPBIND:
1174 return ("Can't communicate with ypbind");
1175 case YPERR_YPSERV:
1176 return ("Can't communicate with ypserv");
1177 case YPERR_NODOM:
1178 return ("Local domain name not set");
1179 case YPERR_BADDB:
1180 return ("Server data base is bad");
1181 case YPERR_VERS:
1182 return ("YP server version mismatch - server can't supply service.");
1183 case YPERR_ACCESS:
1184 return ("Access violation");
1185 case YPERR_BUSY:
1186 return ("Database is busy");
1187 }
1188 sprintf(err, "YP unknown error %d\n", incode);
1189 return (err);
1190 }
1191
1192 int
ypprot_err(unsigned int incode)1193 ypprot_err(unsigned int incode)
1194 {
1195 switch (incode) {
1196 case YP_TRUE:
1197 return (0);
1198 case YP_FALSE:
1199 return (YPERR_YPBIND);
1200 case YP_NOMORE:
1201 return (YPERR_NOMORE);
1202 case YP_NOMAP:
1203 return (YPERR_MAP);
1204 case YP_NODOM:
1205 return (YPERR_DOMAIN);
1206 case YP_NOKEY:
1207 return (YPERR_KEY);
1208 case YP_BADOP:
1209 return (YPERR_YPERR);
1210 case YP_BADDB:
1211 return (YPERR_BADDB);
1212 case YP_YPERR:
1213 return (YPERR_YPERR);
1214 case YP_BADARGS:
1215 return (YPERR_BADARGS);
1216 case YP_VERS:
1217 return (YPERR_VERS);
1218 }
1219 return (YPERR_YPERR);
1220 }
1221
1222 int
_yp_check(char ** dom)1223 _yp_check(char **dom)
1224 {
1225 char *unused;
1226
1227 YPLOCK();
1228 if (_yp_domain[0]=='\0')
1229 if (yp_get_default_domain_locked(&unused)) {
1230 YPUNLOCK();
1231 return (0);
1232 }
1233
1234 if (dom)
1235 *dom = _yp_domain;
1236
1237 if (yp_bind_locked(_yp_domain) == 0) {
1238 yp_unbind_locked(_yp_domain);
1239 YPUNLOCK();
1240 return (1);
1241 }
1242 YPUNLOCK();
1243 return (0);
1244 }
1245