1 /*
2 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
3 * Copyright (c) 1998 Bill Paul <wpaul@ctr.columbia.edu>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote
15 * products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD: stable/9/lib/libc/yp/yplib.c 293804 2016-01-13 05:32:24Z glebius $");
33
34 #include "namespace.h"
35 #include "reentrant.h"
36 #include <sys/param.h>
37 #include <sys/types.h>
38 #include <sys/socket.h>
39 #include <sys/file.h>
40 #include <sys/uio.h>
41 #include <arpa/inet.h>
42 #include <errno.h>
43 #include <stdio.h>
44 #include <string.h>
45 #include <stdlib.h>
46 #include <unistd.h>
47 #include <rpc/rpc.h>
48 #include <rpc/xdr.h>
49 #include <rpcsvc/yp.h>
50 #include "un-namespace.h"
51 #include "libc_private.h"
52
53 /*
54 * We have to define these here due to clashes between yp_prot.h and
55 * yp.h.
56 */
57
58 #define YPMATCHCACHE
59
60 #ifdef YPMATCHCACHE
61 struct ypmatch_ent {
62 char *ypc_map;
63 keydat ypc_key;
64 valdat ypc_val;
65 time_t ypc_expire_t;
66 struct ypmatch_ent *ypc_next;
67 };
68 #define YPLIB_MAXCACHE 5 /* At most 5 entries */
69 #define YPLIB_EXPIRE 5 /* Expire after 5 seconds */
70 #endif
71
72 struct dom_binding {
73 struct dom_binding *dom_pnext;
74 char dom_domain[YPMAXDOMAIN + 1];
75 struct sockaddr_in dom_server_addr;
76 u_short dom_server_port;
77 int dom_socket;
78 CLIENT *dom_client;
79 u_short dom_local_port; /* now I finally know what this is for. */
80 long dom_vers;
81 #ifdef YPMATCHCACHE
82 struct ypmatch_ent *cache;
83 int ypmatch_cachecnt;
84 #endif
85 };
86
87 #include <rpcsvc/ypclnt.h>
88
89 #ifndef BINDINGDIR
90 #define BINDINGDIR "/var/yp/binding"
91 #endif
92 #define MAX_RETRIES 20
93
94 extern bool_t xdr_domainname(), xdr_ypbind_resp();
95 extern bool_t xdr_ypreq_key(), xdr_ypresp_val();
96 extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val();
97 extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq();
98 extern bool_t xdr_ypresp_master();
99
100 int (*ypresp_allfn)();
101 void *ypresp_data;
102
103 static void _yp_unbind(struct dom_binding *);
104 struct dom_binding *_ypbindlist;
105 static char _yp_domain[MAXHOSTNAMELEN];
106 int _yplib_timeout = 20;
107
108 static mutex_t _ypmutex = MUTEX_INITIALIZER;
109 #define YPLOCK() mutex_lock(&_ypmutex);
110 #define YPUNLOCK() mutex_unlock(&_ypmutex);
111
112 #ifdef YPMATCHCACHE
113 static void
ypmatch_cache_delete(struct dom_binding * ypdb,struct ypmatch_ent * prev,struct ypmatch_ent * cur)114 ypmatch_cache_delete(struct dom_binding *ypdb, struct ypmatch_ent *prev,
115 struct ypmatch_ent *cur)
116 {
117 if (prev == NULL)
118 ypdb->cache = cur->ypc_next;
119 else
120 prev->ypc_next = cur->ypc_next;
121
122 free(cur->ypc_map);
123 free(cur->ypc_key.keydat_val);
124 free(cur->ypc_val.valdat_val);
125 free(cur);
126
127 ypdb->ypmatch_cachecnt--;
128
129 return;
130 }
131
132 static void
ypmatch_cache_flush(struct dom_binding * ypdb)133 ypmatch_cache_flush(struct dom_binding *ypdb)
134 {
135 struct ypmatch_ent *n, *c = ypdb->cache;
136
137 while (c != NULL) {
138 n = c->ypc_next;
139 ypmatch_cache_delete(ypdb, NULL, c);
140 c = n;
141 }
142
143 return;
144 }
145
146 static void
ypmatch_cache_expire(struct dom_binding * ypdb)147 ypmatch_cache_expire(struct dom_binding *ypdb)
148 {
149 struct ypmatch_ent *c = ypdb->cache;
150 struct ypmatch_ent *n, *p = NULL;
151 time_t t;
152
153 time(&t);
154
155 while (c != NULL) {
156 if (t >= c->ypc_expire_t) {
157 n = c->ypc_next;
158 ypmatch_cache_delete(ypdb, p, c);
159 c = n;
160 } else {
161 p = c;
162 c = c->ypc_next;
163 }
164 }
165
166 return;
167 }
168
169 static void
ypmatch_cache_insert(struct dom_binding * ypdb,char * map,keydat * key,valdat * val)170 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, keydat *key,
171 valdat *val)
172 {
173 struct ypmatch_ent *new;
174
175 /* Do an expire run to maybe open up a slot. */
176 if (ypdb->ypmatch_cachecnt)
177 ypmatch_cache_expire(ypdb);
178
179 /*
180 * If there are no slots free, then force an expire of
181 * the least recently used entry.
182 */
183 if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
184 struct ypmatch_ent *o = NULL, *c = ypdb->cache;
185 time_t oldest = 0;
186
187 oldest = ~oldest;
188
189 while (c != NULL) {
190 if (c->ypc_expire_t < oldest) {
191 oldest = c->ypc_expire_t;
192 o = c;
193 }
194 c = c->ypc_next;
195 }
196
197 if (o == NULL)
198 return;
199 o->ypc_expire_t = 0;
200 ypmatch_cache_expire(ypdb);
201 }
202
203 new = malloc(sizeof(struct ypmatch_ent));
204 if (new == NULL)
205 return;
206
207 new->ypc_map = strdup(map);
208 if (new->ypc_map == NULL) {
209 free(new);
210 return;
211 }
212 new->ypc_key.keydat_val = malloc(key->keydat_len);
213 if (new->ypc_key.keydat_val == NULL) {
214 free(new->ypc_map);
215 free(new);
216 return;
217 }
218 new->ypc_val.valdat_val = malloc(val->valdat_len);
219 if (new->ypc_val.valdat_val == NULL) {
220 free(new->ypc_val.valdat_val);
221 free(new->ypc_map);
222 free(new);
223 return;
224 }
225
226 new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
227 new->ypc_key.keydat_len = key->keydat_len;
228 new->ypc_val.valdat_len = val->valdat_len;
229 bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
230 bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
231
232 new->ypc_next = ypdb->cache;
233 ypdb->cache = new;
234
235 ypdb->ypmatch_cachecnt++;
236
237 return;
238 }
239
240 static bool_t
ypmatch_cache_lookup(struct dom_binding * ypdb,char * map,keydat * key,valdat * val)241 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key,
242 valdat *val)
243 {
244 struct ypmatch_ent *c;
245
246 ypmatch_cache_expire(ypdb);
247
248 for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
249 if (strcmp(map, c->ypc_map))
250 continue;
251 if (key->keydat_len != c->ypc_key.keydat_len)
252 continue;
253 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
254 key->keydat_len))
255 continue;
256 }
257
258 if (c == NULL)
259 return(FALSE);
260
261 val->valdat_len = c->ypc_val.valdat_len;
262 val->valdat_val = c->ypc_val.valdat_val;
263
264 return(TRUE);
265 }
266 #endif
267
268 const char *
ypbinderr_string(int incode)269 ypbinderr_string(int incode)
270 {
271 static char err[80];
272 switch (incode) {
273 case 0:
274 return ("Success");
275 case YPBIND_ERR_ERR:
276 return ("Internal ypbind error");
277 case YPBIND_ERR_NOSERV:
278 return ("Domain not bound");
279 case YPBIND_ERR_RESC:
280 return ("System resource allocation failure");
281 }
282 sprintf(err, "Unknown ypbind error: #%d\n", incode);
283 return (err);
284 }
285
286 int
_yp_dobind(char * dom,struct dom_binding ** ypdb)287 _yp_dobind(char *dom, struct dom_binding **ypdb)
288 {
289 static pid_t pid = -1;
290 char path[MAXPATHLEN];
291 struct dom_binding *ysd, *ysd2;
292 struct ypbind_resp ypbr;
293 struct timeval tv;
294 struct sockaddr_in clnt_sin;
295 int clnt_sock, fd;
296 pid_t gpid;
297 CLIENT *client;
298 int new = 0, r;
299 int retries = 0;
300 struct sockaddr_in check;
301 socklen_t checklen = sizeof(struct sockaddr_in);
302
303 /* Not allowed; bad doggie. Bad. */
304 if (strchr(dom, '/') != NULL)
305 return(YPERR_BADARGS);
306
307 gpid = getpid();
308 if (!(pid == -1 || pid == gpid)) {
309 ysd = _ypbindlist;
310 while (ysd) {
311 if (ysd->dom_client != NULL)
312 _yp_unbind(ysd);
313 ysd2 = ysd->dom_pnext;
314 free(ysd);
315 ysd = ysd2;
316 }
317 _ypbindlist = NULL;
318 }
319 pid = gpid;
320
321 if (ypdb != NULL)
322 *ypdb = NULL;
323
324 if (dom == NULL || strlen(dom) == 0)
325 return (YPERR_BADARGS);
326
327 for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
328 if (strcmp(dom, ysd->dom_domain) == 0)
329 break;
330
331
332 if (ysd == NULL) {
333 ysd = (struct dom_binding *)malloc(sizeof *ysd);
334 bzero((char *)ysd, sizeof *ysd);
335 ysd->dom_socket = -1;
336 ysd->dom_vers = 0;
337 new = 1;
338 } else {
339 /* Check the socket -- may have been hosed by the caller. */
340 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check,
341 &checklen) == -1 || check.sin_family != AF_INET ||
342 check.sin_port != ysd->dom_local_port) {
343 /* Socket became bogus somehow... need to rebind. */
344 int save, sock;
345
346 sock = ysd->dom_socket;
347 save = _dup(ysd->dom_socket);
348 if (ysd->dom_client != NULL)
349 clnt_destroy(ysd->dom_client);
350 ysd->dom_vers = 0;
351 ysd->dom_client = NULL;
352 sock = _dup2(save, sock);
353 _close(save);
354 }
355 }
356
357 again:
358 retries++;
359 if (retries > MAX_RETRIES) {
360 if (new)
361 free(ysd);
362 return(YPERR_YPBIND);
363 }
364 #ifdef BINDINGDIR
365 if (ysd->dom_vers == 0) {
366 /*
367 * We're trying to make a new binding: zorch the
368 * existing handle now (if any).
369 */
370 if (ysd->dom_client != NULL) {
371 clnt_destroy(ysd->dom_client);
372 ysd->dom_client = NULL;
373 ysd->dom_socket = -1;
374 }
375 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
376 if ((fd = _open(path, O_RDONLY | O_CLOEXEC)) == -1) {
377 /* no binding file, YP is dead. */
378 /* Try to bring it back to life. */
379 _close(fd);
380 goto skipit;
381 }
382 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
383 struct iovec iov[2];
384 struct ypbind_resp ybr;
385 u_short ypb_port;
386
387 iov[0].iov_base = (caddr_t)&ypb_port;
388 iov[0].iov_len = sizeof ypb_port;
389 iov[1].iov_base = (caddr_t)&ybr;
390 iov[1].iov_len = sizeof ybr;
391
392 r = _readv(fd, iov, 2);
393 if (r != iov[0].iov_len + iov[1].iov_len) {
394 _close(fd);
395 ysd->dom_vers = -1;
396 goto again;
397 }
398
399 bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
400 ysd->dom_server_addr.sin_family = AF_INET;
401 ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
402 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
403 &ysd->dom_server_addr.sin_addr.s_addr,
404 sizeof(ysd->dom_server_addr.sin_addr.s_addr));
405 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
406 &ysd->dom_server_addr.sin_port,
407 sizeof(ysd->dom_server_addr.sin_port));
408
409 ysd->dom_server_port = ysd->dom_server_addr.sin_port;
410 _close(fd);
411 goto gotit;
412 } else {
413 /* no lock on binding file, YP is dead. */
414 /* Try to bring it back to life. */
415 _close(fd);
416 goto skipit;
417 }
418 }
419 skipit:
420 #endif
421 if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
422 /*
423 * We're trying to make a new binding: zorch the
424 * existing handle now (if any).
425 */
426 if (ysd->dom_client != NULL) {
427 clnt_destroy(ysd->dom_client);
428 ysd->dom_client = NULL;
429 ysd->dom_socket = -1;
430 }
431 bzero((char *)&clnt_sin, sizeof clnt_sin);
432 clnt_sin.sin_family = AF_INET;
433 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
434
435 clnt_sock = RPC_ANYSOCK;
436 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
437 0, 0);
438 if (client == NULL) {
439 /*
440 * These conditions indicate ypbind just isn't
441 * alive -- we probably don't want to shoot our
442 * mouth off in this case; instead generate error
443 * messages only for really exotic problems.
444 */
445 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
446 (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
447 rpc_createerr.cf_error.re_errno == ECONNREFUSED))
448 clnt_pcreateerror("clnttcp_create");
449 if (new)
450 free(ysd);
451 return (YPERR_YPBIND);
452 }
453
454 /*
455 * Check the port number -- should be < IPPORT_RESERVED.
456 * If not, it's possible someone has registered a bogus
457 * ypbind with the portmapper and is trying to trick us.
458 */
459 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
460 if (client != NULL)
461 clnt_destroy(client);
462 if (new)
463 free(ysd);
464 return(YPERR_YPBIND);
465 }
466 tv.tv_sec = _yplib_timeout/2;
467 tv.tv_usec = 0;
468 r = clnt_call(client, YPBINDPROC_DOMAIN,
469 (xdrproc_t)xdr_domainname, &dom,
470 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
471 if (r != RPC_SUCCESS) {
472 clnt_destroy(client);
473 ysd->dom_vers = -1;
474 if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
475 if (new)
476 free(ysd);
477 return(YPERR_YPBIND);
478 }
479 fprintf(stderr,
480 "YP: server for domain %s not responding, retrying\n", dom);
481 goto again;
482 } else {
483 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
484 struct timespec time_to_sleep, time_remaining;
485
486 clnt_destroy(client);
487 ysd->dom_vers = -1;
488
489 time_to_sleep.tv_sec = _yplib_timeout/2;
490 time_to_sleep.tv_nsec = 0;
491 _nanosleep(&time_to_sleep,
492 &time_remaining);
493 goto again;
494 }
495 }
496 clnt_destroy(client);
497
498 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
499 ysd->dom_server_addr.sin_family = AF_INET;
500 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
501 &ysd->dom_server_addr.sin_port,
502 sizeof(ysd->dom_server_addr.sin_port));
503 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
504 &ysd->dom_server_addr.sin_addr.s_addr,
505 sizeof(ysd->dom_server_addr.sin_addr.s_addr));
506
507 /*
508 * We could do a reserved port check here too, but this
509 * could pose compatibility problems. The local ypbind is
510 * supposed to decide whether or not to trust yp servers
511 * on insecure ports. For now, we trust its judgement.
512 */
513 ysd->dom_server_port =
514 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
515 gotit:
516 ysd->dom_vers = YPVERS;
517 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
518 }
519
520 /* Don't rebuild the connection to the server unless we have to. */
521 if (ysd->dom_client == NULL) {
522 tv.tv_sec = _yplib_timeout/2;
523 tv.tv_usec = 0;
524 ysd->dom_socket = RPC_ANYSOCK;
525 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
526 YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
527 if (ysd->dom_client == NULL) {
528 clnt_pcreateerror("clntudp_create");
529 ysd->dom_vers = -1;
530 goto again;
531 }
532 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
533 perror("fcntl: F_SETFD");
534 /*
535 * We want a port number associated with this socket
536 * so that we can check its authenticity later.
537 */
538 checklen = sizeof(struct sockaddr_in);
539 bzero((char *)&check, checklen);
540 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
541 check.sin_family = AF_INET;
542 if (!_getsockname(ysd->dom_socket,
543 (struct sockaddr *)&check, &checklen)) {
544 ysd->dom_local_port = check.sin_port;
545 } else {
546 clnt_destroy(ysd->dom_client);
547 if (new)
548 free(ysd);
549 return(YPERR_YPBIND);
550 }
551 }
552
553 if (new) {
554 ysd->dom_pnext = _ypbindlist;
555 _ypbindlist = ysd;
556 }
557
558 /*
559 * Set low retry timeout to realistically handle UDP packet
560 * loss for YP packet bursts.
561 */
562 tv.tv_sec = 1;
563 tv.tv_usec = 0;
564 clnt_control(ysd->dom_client, CLSET_RETRY_TIMEOUT, (char*)&tv);
565
566 if (ypdb != NULL)
567 *ypdb = ysd;
568 return (0);
569 }
570
571 static void
_yp_unbind(struct dom_binding * ypb)572 _yp_unbind(struct dom_binding *ypb)
573 {
574 struct sockaddr_in check;
575 socklen_t checklen = sizeof(struct sockaddr_in);
576
577 if (ypb->dom_client != NULL) {
578 /* Check the socket -- may have been hosed by the caller. */
579 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check,
580 &checklen) == -1 || check.sin_family != AF_INET ||
581 check.sin_port != ypb->dom_local_port) {
582 int save, sock;
583
584 sock = ypb->dom_socket;
585 save = _dup(ypb->dom_socket);
586 clnt_destroy(ypb->dom_client);
587 sock = _dup2(save, sock);
588 _close(save);
589 } else
590 clnt_destroy(ypb->dom_client);
591 }
592
593 ypb->dom_client = NULL;
594 ypb->dom_socket = -1;
595 ypb->dom_vers = -1;
596 #ifdef YPMATCHCACHE
597 ypmatch_cache_flush(ypb);
598 #endif
599 }
600
601 static int
yp_bind_locked(char * dom)602 yp_bind_locked(char *dom)
603 {
604 return (_yp_dobind(dom, NULL));
605 }
606
607 int
yp_bind(char * dom)608 yp_bind(char *dom)
609 {
610 int r;
611
612 YPLOCK();
613 r = yp_bind_locked(dom);
614 YPUNLOCK();
615 return (r);
616 }
617
618 static void
yp_unbind_locked(char * dom)619 yp_unbind_locked(char *dom)
620 {
621 struct dom_binding *ypb, *ypbp;
622
623 ypbp = NULL;
624 for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
625 if (strcmp(dom, ypb->dom_domain) == 0) {
626 _yp_unbind(ypb);
627 if (ypbp)
628 ypbp->dom_pnext = ypb->dom_pnext;
629 else
630 _ypbindlist = ypb->dom_pnext;
631 free(ypb);
632 return;
633 }
634 ypbp = ypb;
635 }
636 return;
637 }
638
639 void
yp_unbind(char * dom)640 yp_unbind(char *dom)
641 {
642 YPLOCK();
643 yp_unbind_locked(dom);
644 YPUNLOCK();
645 }
646
647 int
yp_match(char * indomain,char * inmap,const char * inkey,int inkeylen,char ** outval,int * outvallen)648 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
649 char **outval, int *outvallen)
650 {
651 struct dom_binding *ysd;
652 struct ypresp_val yprv;
653 struct timeval tv;
654 struct ypreq_key yprk;
655 int r;
656 int retries = 0;
657 *outval = NULL;
658 *outvallen = 0;
659
660 /* Sanity check */
661
662 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
663 inmap == NULL || !strlen(inmap) ||
664 indomain == NULL || !strlen(indomain))
665 return (YPERR_BADARGS);
666
667 YPLOCK();
668 if (_yp_dobind(indomain, &ysd) != 0) {
669 YPUNLOCK();
670 return(YPERR_DOMAIN);
671 }
672
673 yprk.domain = indomain;
674 yprk.map = inmap;
675 yprk.key.keydat_val = (char *)inkey;
676 yprk.key.keydat_len = inkeylen;
677
678 #ifdef YPMATCHCACHE
679 if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
680 /*
681 if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
682 inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
683 */
684 *outvallen = yprv.val.valdat_len;
685 *outval = (char *)malloc(*outvallen+1);
686 bcopy(yprv.val.valdat_val, *outval, *outvallen);
687 (*outval)[*outvallen] = '\0';
688 YPUNLOCK();
689 return (0);
690 }
691 #endif
692
693 again:
694 if (retries > MAX_RETRIES) {
695 YPUNLOCK();
696 return (YPERR_RPC);
697 }
698
699 if (_yp_dobind(indomain, &ysd) != 0) {
700 YPUNLOCK();
701 return (YPERR_DOMAIN);
702 }
703
704 tv.tv_sec = _yplib_timeout;
705 tv.tv_usec = 0;
706
707 bzero((char *)&yprv, sizeof yprv);
708
709 r = clnt_call(ysd->dom_client, YPPROC_MATCH,
710 (xdrproc_t)xdr_ypreq_key, &yprk,
711 (xdrproc_t)xdr_ypresp_val, &yprv, tv);
712 if (r != RPC_SUCCESS) {
713 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
714 _yp_unbind(ysd);
715 retries++;
716 goto again;
717 }
718
719 if (!(r = ypprot_err(yprv.stat))) {
720 *outvallen = yprv.val.valdat_len;
721 *outval = (char *)malloc(*outvallen+1);
722 bcopy(yprv.val.valdat_val, *outval, *outvallen);
723 (*outval)[*outvallen] = '\0';
724 #ifdef YPMATCHCACHE
725 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
726 #endif
727 }
728
729 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
730 YPUNLOCK();
731 return (r);
732 }
733
734 static int
yp_get_default_domain_locked(char ** domp)735 yp_get_default_domain_locked(char **domp)
736 {
737 *domp = NULL;
738 if (_yp_domain[0] == '\0')
739 if (getdomainname(_yp_domain, sizeof _yp_domain))
740 return (YPERR_NODOM);
741 *domp = _yp_domain;
742 return (0);
743 }
744
745 int
yp_get_default_domain(char ** domp)746 yp_get_default_domain(char **domp)
747 {
748 int r;
749
750 YPLOCK();
751 r = yp_get_default_domain_locked(domp);
752 YPUNLOCK();
753 return (r);
754 }
755
756 int
yp_first(char * indomain,char * inmap,char ** outkey,int * outkeylen,char ** outval,int * outvallen)757 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen,
758 char **outval, int *outvallen)
759 {
760 struct ypresp_key_val yprkv;
761 struct ypreq_nokey yprnk;
762 struct dom_binding *ysd;
763 struct timeval tv;
764 int r;
765 int retries = 0;
766 /* Sanity check */
767
768 if (indomain == NULL || !strlen(indomain) ||
769 inmap == NULL || !strlen(inmap))
770 return (YPERR_BADARGS);
771
772 *outkey = *outval = NULL;
773 *outkeylen = *outvallen = 0;
774
775 YPLOCK();
776 again:
777 if (retries > MAX_RETRIES) {
778 YPUNLOCK();
779 return (YPERR_RPC);
780 }
781
782 if (_yp_dobind(indomain, &ysd) != 0) {
783 YPUNLOCK();
784 return (YPERR_DOMAIN);
785 }
786
787 tv.tv_sec = _yplib_timeout;
788 tv.tv_usec = 0;
789
790 yprnk.domain = indomain;
791 yprnk.map = inmap;
792 bzero((char *)&yprkv, sizeof yprkv);
793
794 r = clnt_call(ysd->dom_client, YPPROC_FIRST,
795 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
796 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
797 if (r != RPC_SUCCESS) {
798 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
799 _yp_unbind(ysd);
800 retries++;
801 goto again;
802 }
803 if (!(r = ypprot_err(yprkv.stat))) {
804 *outkeylen = yprkv.key.keydat_len;
805 *outkey = (char *)malloc(*outkeylen+1);
806 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
807 (*outkey)[*outkeylen] = '\0';
808 *outvallen = yprkv.val.valdat_len;
809 *outval = (char *)malloc(*outvallen+1);
810 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
811 (*outval)[*outvallen] = '\0';
812 }
813
814 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
815 YPUNLOCK();
816 return (r);
817 }
818
819 int
yp_next(char * indomain,char * inmap,char * inkey,int inkeylen,char ** outkey,int * outkeylen,char ** outval,int * outvallen)820 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen,
821 char **outkey, int *outkeylen, char **outval, int *outvallen)
822 {
823 struct ypresp_key_val yprkv;
824 struct ypreq_key yprk;
825 struct dom_binding *ysd;
826 struct timeval tv;
827 int r;
828 int retries = 0;
829 /* Sanity check */
830
831 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
832 inmap == NULL || !strlen(inmap) ||
833 indomain == NULL || !strlen(indomain))
834 return (YPERR_BADARGS);
835
836 *outkey = *outval = NULL;
837 *outkeylen = *outvallen = 0;
838
839 YPLOCK();
840 again:
841 if (retries > MAX_RETRIES) {
842 YPUNLOCK();
843 return (YPERR_RPC);
844 }
845
846 if (_yp_dobind(indomain, &ysd) != 0) {
847 YPUNLOCK();
848 return (YPERR_DOMAIN);
849 }
850
851 tv.tv_sec = _yplib_timeout;
852 tv.tv_usec = 0;
853
854 yprk.domain = indomain;
855 yprk.map = inmap;
856 yprk.key.keydat_val = inkey;
857 yprk.key.keydat_len = inkeylen;
858 bzero((char *)&yprkv, sizeof yprkv);
859
860 r = clnt_call(ysd->dom_client, YPPROC_NEXT,
861 (xdrproc_t)xdr_ypreq_key, &yprk,
862 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
863 if (r != RPC_SUCCESS) {
864 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
865 _yp_unbind(ysd);
866 retries++;
867 goto again;
868 }
869 if (!(r = ypprot_err(yprkv.stat))) {
870 *outkeylen = yprkv.key.keydat_len;
871 *outkey = (char *)malloc(*outkeylen+1);
872 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
873 (*outkey)[*outkeylen] = '\0';
874 *outvallen = yprkv.val.valdat_len;
875 *outval = (char *)malloc(*outvallen+1);
876 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
877 (*outval)[*outvallen] = '\0';
878 }
879
880 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
881 YPUNLOCK();
882 return (r);
883 }
884
885 int
yp_all(char * indomain,char * inmap,struct ypall_callback * incallback)886 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
887 {
888 struct ypreq_nokey yprnk;
889 struct dom_binding *ysd;
890 struct timeval tv;
891 struct sockaddr_in clnt_sin;
892 CLIENT *clnt;
893 u_long status, savstat;
894 int clnt_sock;
895 int retries = 0;
896 /* Sanity check */
897
898 if (indomain == NULL || !strlen(indomain) ||
899 inmap == NULL || !strlen(inmap))
900 return (YPERR_BADARGS);
901
902 YPLOCK();
903 again:
904 if (retries > MAX_RETRIES) {
905 YPUNLOCK();
906 return (YPERR_RPC);
907 }
908
909 if (_yp_dobind(indomain, &ysd) != 0) {
910 YPUNLOCK();
911 return (YPERR_DOMAIN);
912 }
913
914 tv.tv_sec = _yplib_timeout;
915 tv.tv_usec = 0;
916
917 /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
918
919 clnt_sock = RPC_ANYSOCK;
920 clnt_sin = ysd->dom_server_addr;
921 clnt_sin.sin_port = 0;
922 clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
923 if (clnt == NULL) {
924 YPUNLOCK();
925 printf("clnttcp_create failed\n");
926 return (YPERR_PMAP);
927 }
928
929 yprnk.domain = indomain;
930 yprnk.map = inmap;
931 ypresp_allfn = incallback->foreach;
932 ypresp_data = (void *)incallback->data;
933
934 if (clnt_call(clnt, YPPROC_ALL,
935 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
936 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
937 clnt_perror(clnt, "yp_all: clnt_call");
938 clnt_destroy(clnt);
939 _yp_unbind(ysd);
940 retries++;
941 goto again;
942 }
943
944 clnt_destroy(clnt);
945 savstat = status;
946 xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status); /* not really needed... */
947 YPUNLOCK();
948 if (savstat != YP_NOMORE)
949 return (ypprot_err(savstat));
950 return (0);
951 }
952
953 int
yp_order(char * indomain,char * inmap,int * outorder)954 yp_order(char *indomain, char *inmap, int *outorder)
955 {
956 struct dom_binding *ysd;
957 struct ypresp_order ypro;
958 struct ypreq_nokey yprnk;
959 struct timeval tv;
960 int r;
961
962 /* Sanity check */
963
964 if (indomain == NULL || !strlen(indomain) ||
965 inmap == NULL || !strlen(inmap))
966 return (YPERR_BADARGS);
967
968 YPLOCK();
969 again:
970 if (_yp_dobind(indomain, &ysd) != 0) {
971 YPUNLOCK();
972 return (YPERR_DOMAIN);
973 }
974
975 tv.tv_sec = _yplib_timeout;
976 tv.tv_usec = 0;
977
978 yprnk.domain = indomain;
979 yprnk.map = inmap;
980
981 bzero((char *)(char *)&ypro, sizeof ypro);
982
983 r = clnt_call(ysd->dom_client, YPPROC_ORDER,
984 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
985 (xdrproc_t)xdr_ypresp_order, &ypro, tv);
986
987 /*
988 * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
989 * procedure.
990 */
991 if (r == RPC_PROCUNAVAIL) {
992 YPUNLOCK();
993 return(YPERR_YPERR);
994 }
995
996 if (r != RPC_SUCCESS) {
997 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
998 _yp_unbind(ysd);
999 goto again;
1000 }
1001
1002 if (!(r = ypprot_err(ypro.stat))) {
1003 *outorder = ypro.ordernum;
1004 }
1005
1006 xdr_free((xdrproc_t)xdr_ypresp_order, &ypro);
1007 YPUNLOCK();
1008 return (r);
1009 }
1010
1011 int
yp_master(char * indomain,char * inmap,char ** outname)1012 yp_master(char *indomain, char *inmap, char **outname)
1013 {
1014 struct dom_binding *ysd;
1015 struct ypresp_master yprm;
1016 struct ypreq_nokey yprnk;
1017 struct timeval tv;
1018 int r;
1019
1020 /* Sanity check */
1021
1022 if (indomain == NULL || !strlen(indomain) ||
1023 inmap == NULL || !strlen(inmap))
1024 return (YPERR_BADARGS);
1025 YPLOCK();
1026 again:
1027 if (_yp_dobind(indomain, &ysd) != 0) {
1028 YPUNLOCK();
1029 return (YPERR_DOMAIN);
1030 }
1031
1032 tv.tv_sec = _yplib_timeout;
1033 tv.tv_usec = 0;
1034
1035 yprnk.domain = indomain;
1036 yprnk.map = inmap;
1037
1038 bzero((char *)&yprm, sizeof yprm);
1039
1040 r = clnt_call(ysd->dom_client, YPPROC_MASTER,
1041 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
1042 (xdrproc_t)xdr_ypresp_master, &yprm, tv);
1043 if (r != RPC_SUCCESS) {
1044 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
1045 _yp_unbind(ysd);
1046 goto again;
1047 }
1048
1049 if (!(r = ypprot_err(yprm.stat))) {
1050 *outname = (char *)strdup(yprm.peer);
1051 }
1052
1053 xdr_free((xdrproc_t)xdr_ypresp_master, &yprm);
1054 YPUNLOCK();
1055 return (r);
1056 }
1057
1058 int
yp_maplist(char * indomain,struct ypmaplist ** outmaplist)1059 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
1060 {
1061 struct dom_binding *ysd;
1062 struct ypresp_maplist ypml;
1063 struct timeval tv;
1064 int r;
1065
1066 /* Sanity check */
1067
1068 if (indomain == NULL || !strlen(indomain))
1069 return (YPERR_BADARGS);
1070
1071 YPLOCK();
1072 again:
1073 if (_yp_dobind(indomain, &ysd) != 0) {
1074 YPUNLOCK();
1075 return (YPERR_DOMAIN);
1076 }
1077
1078 tv.tv_sec = _yplib_timeout;
1079 tv.tv_usec = 0;
1080
1081 bzero((char *)&ypml, sizeof ypml);
1082
1083 r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
1084 (xdrproc_t)xdr_domainname, &indomain,
1085 (xdrproc_t)xdr_ypresp_maplist, &ypml,tv);
1086 if (r != RPC_SUCCESS) {
1087 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
1088 _yp_unbind(ysd);
1089 goto again;
1090 }
1091 if (!(r = ypprot_err(ypml.stat))) {
1092 *outmaplist = ypml.maps;
1093 }
1094
1095 /* NO: xdr_free((xdrproc_t)xdr_ypresp_maplist, &ypml);*/
1096 YPUNLOCK();
1097 return (r);
1098 }
1099
1100 const char *
yperr_string(int incode)1101 yperr_string(int incode)
1102 {
1103 static char err[80];
1104
1105 switch (incode) {
1106 case 0:
1107 return ("Success");
1108 case YPERR_BADARGS:
1109 return ("Request arguments bad");
1110 case YPERR_RPC:
1111 return ("RPC failure");
1112 case YPERR_DOMAIN:
1113 return ("Can't bind to server which serves this domain");
1114 case YPERR_MAP:
1115 return ("No such map in server's domain");
1116 case YPERR_KEY:
1117 return ("No such key in map");
1118 case YPERR_YPERR:
1119 return ("YP server error");
1120 case YPERR_RESRC:
1121 return ("Local resource allocation failure");
1122 case YPERR_NOMORE:
1123 return ("No more records in map database");
1124 case YPERR_PMAP:
1125 return ("Can't communicate with portmapper");
1126 case YPERR_YPBIND:
1127 return ("Can't communicate with ypbind");
1128 case YPERR_YPSERV:
1129 return ("Can't communicate with ypserv");
1130 case YPERR_NODOM:
1131 return ("Local domain name not set");
1132 case YPERR_BADDB:
1133 return ("Server data base is bad");
1134 case YPERR_VERS:
1135 return ("YP server version mismatch - server can't supply service.");
1136 case YPERR_ACCESS:
1137 return ("Access violation");
1138 case YPERR_BUSY:
1139 return ("Database is busy");
1140 }
1141 sprintf(err, "YP unknown error %d\n", incode);
1142 return (err);
1143 }
1144
1145 int
ypprot_err(unsigned int incode)1146 ypprot_err(unsigned int incode)
1147 {
1148 switch (incode) {
1149 case YP_TRUE:
1150 return (0);
1151 case YP_FALSE:
1152 return (YPERR_YPBIND);
1153 case YP_NOMORE:
1154 return (YPERR_NOMORE);
1155 case YP_NOMAP:
1156 return (YPERR_MAP);
1157 case YP_NODOM:
1158 return (YPERR_DOMAIN);
1159 case YP_NOKEY:
1160 return (YPERR_KEY);
1161 case YP_BADOP:
1162 return (YPERR_YPERR);
1163 case YP_BADDB:
1164 return (YPERR_BADDB);
1165 case YP_YPERR:
1166 return (YPERR_YPERR);
1167 case YP_BADARGS:
1168 return (YPERR_BADARGS);
1169 case YP_VERS:
1170 return (YPERR_VERS);
1171 }
1172 return (YPERR_YPERR);
1173 }
1174
1175 int
_yp_check(char ** dom)1176 _yp_check(char **dom)
1177 {
1178 char *unused;
1179
1180 YPLOCK();
1181 if (_yp_domain[0]=='\0')
1182 if (yp_get_default_domain_locked(&unused)) {
1183 YPUNLOCK();
1184 return (0);
1185 }
1186
1187 if (dom)
1188 *dom = _yp_domain;
1189
1190 if (yp_bind_locked(_yp_domain) == 0) {
1191 yp_unbind_locked(_yp_domain);
1192 YPUNLOCK();
1193 return (1);
1194 }
1195 YPUNLOCK();
1196 return (0);
1197 }
1198