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