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/10/lib/libc/yp/yplib.c 292547 2015-12-21 14:32:29Z araujo $");
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 if (ysd == NULL)
335 return (YPERR_RESRC);
336 bzero((char *)ysd, sizeof *ysd);
337 ysd->dom_socket = -1;
338 ysd->dom_vers = 0;
339 new = 1;
340 } else {
341 /* Check the socket -- may have been hosed by the caller. */
342 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check,
343 &checklen) == -1 || check.sin_family != AF_INET ||
344 check.sin_port != ysd->dom_local_port) {
345 /* Socket became bogus somehow... need to rebind. */
346 int save, sock;
347
348 sock = ysd->dom_socket;
349 save = _dup(ysd->dom_socket);
350 if (ysd->dom_client != NULL)
351 clnt_destroy(ysd->dom_client);
352 ysd->dom_vers = 0;
353 ysd->dom_client = NULL;
354 sock = _dup2(save, sock);
355 _close(save);
356 }
357 }
358
359 again:
360 retries++;
361 if (retries > MAX_RETRIES) {
362 if (new)
363 free(ysd);
364 return(YPERR_YPBIND);
365 }
366 #ifdef BINDINGDIR
367 if (ysd->dom_vers == 0) {
368 /*
369 * We're trying to make a new binding: zorch the
370 * existing handle now (if any).
371 */
372 if (ysd->dom_client != NULL) {
373 clnt_destroy(ysd->dom_client);
374 ysd->dom_client = NULL;
375 ysd->dom_socket = -1;
376 }
377 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
378 if ((fd = _open(path, O_RDONLY | O_CLOEXEC)) == -1) {
379 /* no binding file, YP is dead. */
380 /* Try to bring it back to life. */
381 _close(fd);
382 goto skipit;
383 }
384 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
385 struct iovec iov[2];
386 struct ypbind_resp ybr;
387 u_short ypb_port;
388
389 iov[0].iov_base = (caddr_t)&ypb_port;
390 iov[0].iov_len = sizeof ypb_port;
391 iov[1].iov_base = (caddr_t)&ybr;
392 iov[1].iov_len = sizeof ybr;
393
394 r = _readv(fd, iov, 2);
395 if (r != iov[0].iov_len + iov[1].iov_len) {
396 _close(fd);
397 ysd->dom_vers = -1;
398 goto again;
399 }
400
401 bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
402 ysd->dom_server_addr.sin_family = AF_INET;
403 ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
404 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
405 &ysd->dom_server_addr.sin_addr.s_addr,
406 sizeof(ysd->dom_server_addr.sin_addr.s_addr));
407 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
408 &ysd->dom_server_addr.sin_port,
409 sizeof(ysd->dom_server_addr.sin_port));
410
411 ysd->dom_server_port = ysd->dom_server_addr.sin_port;
412 _close(fd);
413 goto gotit;
414 } else {
415 /* no lock on binding file, YP is dead. */
416 /* Try to bring it back to life. */
417 _close(fd);
418 goto skipit;
419 }
420 }
421 skipit:
422 #endif
423 if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
424 /*
425 * We're trying to make a new binding: zorch the
426 * existing handle now (if any).
427 */
428 if (ysd->dom_client != NULL) {
429 clnt_destroy(ysd->dom_client);
430 ysd->dom_client = NULL;
431 ysd->dom_socket = -1;
432 }
433 bzero((char *)&clnt_sin, sizeof clnt_sin);
434 clnt_sin.sin_family = AF_INET;
435 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
436
437 clnt_sock = RPC_ANYSOCK;
438 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
439 0, 0);
440 if (client == NULL) {
441 /*
442 * These conditions indicate ypbind just isn't
443 * alive -- we probably don't want to shoot our
444 * mouth off in this case; instead generate error
445 * messages only for really exotic problems.
446 */
447 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
448 (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
449 rpc_createerr.cf_error.re_errno == ECONNREFUSED))
450 clnt_pcreateerror("clnttcp_create");
451 if (new)
452 free(ysd);
453 return (YPERR_YPBIND);
454 }
455
456 /*
457 * Check the port number -- should be < IPPORT_RESERVED.
458 * If not, it's possible someone has registered a bogus
459 * ypbind with the portmapper and is trying to trick us.
460 */
461 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
462 if (client != NULL)
463 clnt_destroy(client);
464 if (new)
465 free(ysd);
466 return(YPERR_YPBIND);
467 }
468 tv.tv_sec = _yplib_timeout/2;
469 tv.tv_usec = 0;
470 r = clnt_call(client, YPBINDPROC_DOMAIN,
471 (xdrproc_t)xdr_domainname, &dom,
472 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
473 if (r != RPC_SUCCESS) {
474 clnt_destroy(client);
475 ysd->dom_vers = -1;
476 if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
477 if (new)
478 free(ysd);
479 return(YPERR_YPBIND);
480 }
481 fprintf(stderr,
482 "YP: server for domain %s not responding, retrying\n", dom);
483 goto again;
484 } else {
485 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
486 struct timespec time_to_sleep, time_remaining;
487
488 clnt_destroy(client);
489 ysd->dom_vers = -1;
490
491 time_to_sleep.tv_sec = _yplib_timeout/2;
492 time_to_sleep.tv_nsec = 0;
493 _nanosleep(&time_to_sleep,
494 &time_remaining);
495 goto again;
496 }
497 }
498 clnt_destroy(client);
499
500 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
501 ysd->dom_server_addr.sin_family = AF_INET;
502 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
503 &ysd->dom_server_addr.sin_port,
504 sizeof(ysd->dom_server_addr.sin_port));
505 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
506 &ysd->dom_server_addr.sin_addr.s_addr,
507 sizeof(ysd->dom_server_addr.sin_addr.s_addr));
508
509 /*
510 * We could do a reserved port check here too, but this
511 * could pose compatibility problems. The local ypbind is
512 * supposed to decide whether or not to trust yp servers
513 * on insecure ports. For now, we trust its judgement.
514 */
515 ysd->dom_server_port =
516 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
517 gotit:
518 ysd->dom_vers = YPVERS;
519 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
520 }
521
522 /* Don't rebuild the connection to the server unless we have to. */
523 if (ysd->dom_client == NULL) {
524 tv.tv_sec = _yplib_timeout/2;
525 tv.tv_usec = 0;
526 ysd->dom_socket = RPC_ANYSOCK;
527 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
528 YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
529 if (ysd->dom_client == NULL) {
530 clnt_pcreateerror("clntudp_create");
531 ysd->dom_vers = -1;
532 goto again;
533 }
534 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
535 perror("fcntl: F_SETFD");
536 /*
537 * We want a port number associated with this socket
538 * so that we can check its authenticity later.
539 */
540 checklen = sizeof(struct sockaddr_in);
541 bzero((char *)&check, checklen);
542 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
543 check.sin_family = AF_INET;
544 if (!_getsockname(ysd->dom_socket,
545 (struct sockaddr *)&check, &checklen)) {
546 ysd->dom_local_port = check.sin_port;
547 } else {
548 clnt_destroy(ysd->dom_client);
549 if (new)
550 free(ysd);
551 return(YPERR_YPBIND);
552 }
553 }
554
555 if (new) {
556 ysd->dom_pnext = _ypbindlist;
557 _ypbindlist = ysd;
558 }
559
560 /*
561 * Set low retry timeout to realistically handle UDP packet
562 * loss for YP packet bursts.
563 */
564 tv.tv_sec = 1;
565 tv.tv_usec = 0;
566 clnt_control(ysd->dom_client, CLSET_RETRY_TIMEOUT, (char*)&tv);
567
568 if (ypdb != NULL)
569 *ypdb = ysd;
570 return (0);
571 }
572
573 static void
_yp_unbind(struct dom_binding * ypb)574 _yp_unbind(struct dom_binding *ypb)
575 {
576 struct sockaddr_in check;
577 socklen_t checklen = sizeof(struct sockaddr_in);
578
579 if (ypb->dom_client != NULL) {
580 /* Check the socket -- may have been hosed by the caller. */
581 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check,
582 &checklen) == -1 || check.sin_family != AF_INET ||
583 check.sin_port != ypb->dom_local_port) {
584 int save, sock;
585
586 sock = ypb->dom_socket;
587 save = _dup(ypb->dom_socket);
588 clnt_destroy(ypb->dom_client);
589 sock = _dup2(save, sock);
590 _close(save);
591 } else
592 clnt_destroy(ypb->dom_client);
593 }
594
595 ypb->dom_client = NULL;
596 ypb->dom_socket = -1;
597 ypb->dom_vers = -1;
598 #ifdef YPMATCHCACHE
599 ypmatch_cache_flush(ypb);
600 #endif
601 }
602
603 static int
yp_bind_locked(char * dom)604 yp_bind_locked(char *dom)
605 {
606 return (_yp_dobind(dom, NULL));
607 }
608
609 int
yp_bind(char * dom)610 yp_bind(char *dom)
611 {
612 int r;
613
614 YPLOCK();
615 r = yp_bind_locked(dom);
616 YPUNLOCK();
617 return (r);
618 }
619
620 static void
yp_unbind_locked(char * dom)621 yp_unbind_locked(char *dom)
622 {
623 struct dom_binding *ypb, *ypbp;
624
625 ypbp = NULL;
626 for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
627 if (strcmp(dom, ypb->dom_domain) == 0) {
628 _yp_unbind(ypb);
629 if (ypbp)
630 ypbp->dom_pnext = ypb->dom_pnext;
631 else
632 _ypbindlist = ypb->dom_pnext;
633 free(ypb);
634 return;
635 }
636 ypbp = ypb;
637 }
638 return;
639 }
640
641 void
yp_unbind(char * dom)642 yp_unbind(char *dom)
643 {
644 YPLOCK();
645 yp_unbind_locked(dom);
646 YPUNLOCK();
647 }
648
649 int
yp_match(char * indomain,char * inmap,const char * inkey,int inkeylen,char ** outval,int * outvallen)650 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
651 char **outval, int *outvallen)
652 {
653 struct dom_binding *ysd;
654 struct ypresp_val yprv;
655 struct timeval tv;
656 struct ypreq_key yprk;
657 int r;
658 int retries = 0;
659 *outval = NULL;
660 *outvallen = 0;
661
662 /* Sanity check */
663
664 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
665 inmap == NULL || !strlen(inmap) ||
666 indomain == NULL || !strlen(indomain))
667 return (YPERR_BADARGS);
668
669 YPLOCK();
670 if (_yp_dobind(indomain, &ysd) != 0) {
671 YPUNLOCK();
672 return(YPERR_DOMAIN);
673 }
674
675 yprk.domain = indomain;
676 yprk.map = inmap;
677 yprk.key.keydat_val = (char *)inkey;
678 yprk.key.keydat_len = inkeylen;
679
680 #ifdef YPMATCHCACHE
681 if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
682 /*
683 if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
684 inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
685 */
686 *outvallen = yprv.val.valdat_len;
687 *outval = (char *)malloc(*outvallen+1);
688 if (*outval == NULL) {
689 _yp_unbind(ysd);
690 *outvallen = 0;
691 YPUNLOCK();
692 return (YPERR_RESRC);
693 }
694 bcopy(yprv.val.valdat_val, *outval, *outvallen);
695 (*outval)[*outvallen] = '\0';
696 YPUNLOCK();
697 return (0);
698 }
699 _yp_unbind(ysd);
700 #endif
701
702 again:
703 if (retries > MAX_RETRIES) {
704 YPUNLOCK();
705 return (YPERR_RPC);
706 }
707
708 if (_yp_dobind(indomain, &ysd) != 0) {
709 YPUNLOCK();
710 return (YPERR_DOMAIN);
711 }
712
713 tv.tv_sec = _yplib_timeout;
714 tv.tv_usec = 0;
715
716 bzero((char *)&yprv, sizeof yprv);
717
718 r = clnt_call(ysd->dom_client, YPPROC_MATCH,
719 (xdrproc_t)xdr_ypreq_key, &yprk,
720 (xdrproc_t)xdr_ypresp_val, &yprv, tv);
721 if (r != RPC_SUCCESS) {
722 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
723 _yp_unbind(ysd);
724 retries++;
725 goto again;
726 }
727
728 if (!(r = ypprot_err(yprv.stat))) {
729 *outvallen = yprv.val.valdat_len;
730 *outval = (char *)malloc(*outvallen+1);
731 if (*outval == NULL) {
732 _yp_unbind(ysd);
733 *outvallen = 0;
734 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
735 YPUNLOCK();
736 return (YPERR_RESRC);
737 }
738 bcopy(yprv.val.valdat_val, *outval, *outvallen);
739 (*outval)[*outvallen] = '\0';
740 #ifdef YPMATCHCACHE
741 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
742 #endif
743 }
744
745 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
746 YPUNLOCK();
747 return (r);
748 }
749
750 static int
yp_get_default_domain_locked(char ** domp)751 yp_get_default_domain_locked(char **domp)
752 {
753 *domp = NULL;
754 if (_yp_domain[0] == '\0')
755 if (getdomainname(_yp_domain, sizeof _yp_domain))
756 return (YPERR_NODOM);
757 *domp = _yp_domain;
758 return (0);
759 }
760
761 int
yp_get_default_domain(char ** domp)762 yp_get_default_domain(char **domp)
763 {
764 int r;
765
766 YPLOCK();
767 r = yp_get_default_domain_locked(domp);
768 YPUNLOCK();
769 return (r);
770 }
771
772 int
yp_first(char * indomain,char * inmap,char ** outkey,int * outkeylen,char ** outval,int * outvallen)773 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen,
774 char **outval, int *outvallen)
775 {
776 struct ypresp_key_val yprkv;
777 struct ypreq_nokey yprnk;
778 struct dom_binding *ysd;
779 struct timeval tv;
780 int r;
781 int retries = 0;
782 /* Sanity check */
783
784 if (indomain == NULL || !strlen(indomain) ||
785 inmap == NULL || !strlen(inmap))
786 return (YPERR_BADARGS);
787
788 *outkey = *outval = NULL;
789 *outkeylen = *outvallen = 0;
790
791 YPLOCK();
792 again:
793 if (retries > MAX_RETRIES) {
794 YPUNLOCK();
795 return (YPERR_RPC);
796 }
797
798 if (_yp_dobind(indomain, &ysd) != 0) {
799 YPUNLOCK();
800 return (YPERR_DOMAIN);
801 }
802
803 tv.tv_sec = _yplib_timeout;
804 tv.tv_usec = 0;
805
806 yprnk.domain = indomain;
807 yprnk.map = inmap;
808 bzero((char *)&yprkv, sizeof yprkv);
809
810 r = clnt_call(ysd->dom_client, YPPROC_FIRST,
811 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
812 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
813 if (r != RPC_SUCCESS) {
814 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
815 _yp_unbind(ysd);
816 retries++;
817 goto again;
818 }
819 if (!(r = ypprot_err(yprkv.stat))) {
820 *outkeylen = yprkv.key.keydat_len;
821 *outkey = (char *)malloc(*outkeylen+1);
822 if (*outkey == NULL) {
823 _yp_unbind(ysd);
824 *outkeylen = 0;
825 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
826 YPUNLOCK();
827 return (YPERR_RESRC);
828 }
829 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
830 (*outkey)[*outkeylen] = '\0';
831 *outvallen = yprkv.val.valdat_len;
832 *outval = (char *)malloc(*outvallen+1);
833 if (*outval == NULL) {
834 free(*outkey);
835 _yp_unbind(ysd);
836 *outkeylen = *outvallen = 0;
837 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
838 YPUNLOCK();
839 return (YPERR_RESRC);
840 }
841 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
842 (*outval)[*outvallen] = '\0';
843 }
844
845 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
846 YPUNLOCK();
847 return (r);
848 }
849
850 int
yp_next(char * indomain,char * inmap,char * inkey,int inkeylen,char ** outkey,int * outkeylen,char ** outval,int * outvallen)851 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen,
852 char **outkey, int *outkeylen, char **outval, int *outvallen)
853 {
854 struct ypresp_key_val yprkv;
855 struct ypreq_key yprk;
856 struct dom_binding *ysd;
857 struct timeval tv;
858 int r;
859 int retries = 0;
860 /* Sanity check */
861
862 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
863 inmap == NULL || !strlen(inmap) ||
864 indomain == NULL || !strlen(indomain))
865 return (YPERR_BADARGS);
866
867 *outkey = *outval = NULL;
868 *outkeylen = *outvallen = 0;
869
870 YPLOCK();
871 again:
872 if (retries > MAX_RETRIES) {
873 YPUNLOCK();
874 return (YPERR_RPC);
875 }
876
877 if (_yp_dobind(indomain, &ysd) != 0) {
878 YPUNLOCK();
879 return (YPERR_DOMAIN);
880 }
881
882 tv.tv_sec = _yplib_timeout;
883 tv.tv_usec = 0;
884
885 yprk.domain = indomain;
886 yprk.map = inmap;
887 yprk.key.keydat_val = inkey;
888 yprk.key.keydat_len = inkeylen;
889 bzero((char *)&yprkv, sizeof yprkv);
890
891 r = clnt_call(ysd->dom_client, YPPROC_NEXT,
892 (xdrproc_t)xdr_ypreq_key, &yprk,
893 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
894 if (r != RPC_SUCCESS) {
895 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
896 _yp_unbind(ysd);
897 retries++;
898 goto again;
899 }
900 if (!(r = ypprot_err(yprkv.stat))) {
901 *outkeylen = yprkv.key.keydat_len;
902 *outkey = (char *)malloc(*outkeylen+1);
903 if (*outkey == NULL) {
904 _yp_unbind(ysd);
905 *outkeylen = 0;
906 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
907 YPUNLOCK();
908 return (YPERR_RESRC);
909 }
910 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
911 (*outkey)[*outkeylen] = '\0';
912 *outvallen = yprkv.val.valdat_len;
913 *outval = (char *)malloc(*outvallen+1);
914 if (*outval == NULL) {
915 free(*outkey);
916 _yp_unbind(ysd);
917 *outkeylen = *outvallen = 0;
918 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
919 YPUNLOCK();
920 return (YPERR_RESRC);
921 }
922 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
923 (*outval)[*outvallen] = '\0';
924 }
925
926 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
927 YPUNLOCK();
928 return (r);
929 }
930
931 int
yp_all(char * indomain,char * inmap,struct ypall_callback * incallback)932 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
933 {
934 struct ypreq_nokey yprnk;
935 struct dom_binding *ysd;
936 struct timeval tv;
937 struct sockaddr_in clnt_sin;
938 CLIENT *clnt;
939 u_long status, savstat;
940 int clnt_sock;
941 int retries = 0;
942 /* Sanity check */
943
944 if (indomain == NULL || !strlen(indomain) ||
945 inmap == NULL || !strlen(inmap))
946 return (YPERR_BADARGS);
947
948 YPLOCK();
949 again:
950 if (retries > MAX_RETRIES) {
951 YPUNLOCK();
952 return (YPERR_RPC);
953 }
954
955 if (_yp_dobind(indomain, &ysd) != 0) {
956 YPUNLOCK();
957 return (YPERR_DOMAIN);
958 }
959
960 tv.tv_sec = _yplib_timeout;
961 tv.tv_usec = 0;
962
963 /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
964
965 clnt_sock = RPC_ANYSOCK;
966 clnt_sin = ysd->dom_server_addr;
967 clnt_sin.sin_port = 0;
968 clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
969 if (clnt == NULL) {
970 YPUNLOCK();
971 printf("clnttcp_create failed\n");
972 return (YPERR_PMAP);
973 }
974
975 yprnk.domain = indomain;
976 yprnk.map = inmap;
977 ypresp_allfn = incallback->foreach;
978 ypresp_data = (void *)incallback->data;
979
980 if (clnt_call(clnt, YPPROC_ALL,
981 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
982 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
983 clnt_perror(clnt, "yp_all: clnt_call");
984 clnt_destroy(clnt);
985 _yp_unbind(ysd);
986 retries++;
987 goto again;
988 }
989
990 clnt_destroy(clnt);
991 savstat = status;
992 xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status); /* not really needed... */
993 YPUNLOCK();
994 if (savstat != YP_NOMORE)
995 return (ypprot_err(savstat));
996 return (0);
997 }
998
999 int
yp_order(char * indomain,char * inmap,int * outorder)1000 yp_order(char *indomain, char *inmap, int *outorder)
1001 {
1002 struct dom_binding *ysd;
1003 struct ypresp_order ypro;
1004 struct ypreq_nokey yprnk;
1005 struct timeval tv;
1006 int r;
1007
1008 /* Sanity check */
1009
1010 if (indomain == NULL || !strlen(indomain) ||
1011 inmap == NULL || !strlen(inmap))
1012 return (YPERR_BADARGS);
1013
1014 YPLOCK();
1015 again:
1016 if (_yp_dobind(indomain, &ysd) != 0) {
1017 YPUNLOCK();
1018 return (YPERR_DOMAIN);
1019 }
1020
1021 tv.tv_sec = _yplib_timeout;
1022 tv.tv_usec = 0;
1023
1024 yprnk.domain = indomain;
1025 yprnk.map = inmap;
1026
1027 bzero((char *)(char *)&ypro, sizeof ypro);
1028
1029 r = clnt_call(ysd->dom_client, YPPROC_ORDER,
1030 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
1031 (xdrproc_t)xdr_ypresp_order, &ypro, tv);
1032
1033 /*
1034 * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
1035 * procedure.
1036 */
1037 if (r == RPC_PROCUNAVAIL) {
1038 YPUNLOCK();
1039 return(YPERR_YPERR);
1040 }
1041
1042 if (r != RPC_SUCCESS) {
1043 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
1044 _yp_unbind(ysd);
1045 goto again;
1046 }
1047
1048 if (!(r = ypprot_err(ypro.stat))) {
1049 *outorder = ypro.ordernum;
1050 }
1051
1052 xdr_free((xdrproc_t)xdr_ypresp_order, &ypro);
1053 YPUNLOCK();
1054 return (r);
1055 }
1056
1057 int
yp_master(char * indomain,char * inmap,char ** outname)1058 yp_master(char *indomain, char *inmap, char **outname)
1059 {
1060 struct dom_binding *ysd;
1061 struct ypresp_master yprm;
1062 struct ypreq_nokey yprnk;
1063 struct timeval tv;
1064 int r;
1065
1066 /* Sanity check */
1067
1068 if (indomain == NULL || !strlen(indomain) ||
1069 inmap == NULL || !strlen(inmap))
1070 return (YPERR_BADARGS);
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 yprnk.domain = indomain;
1082 yprnk.map = inmap;
1083
1084 bzero((char *)&yprm, sizeof yprm);
1085
1086 r = clnt_call(ysd->dom_client, YPPROC_MASTER,
1087 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
1088 (xdrproc_t)xdr_ypresp_master, &yprm, tv);
1089 if (r != RPC_SUCCESS) {
1090 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
1091 _yp_unbind(ysd);
1092 goto again;
1093 }
1094
1095 if (!(r = ypprot_err(yprm.stat))) {
1096 *outname = (char *)strdup(yprm.peer);
1097 }
1098
1099 xdr_free((xdrproc_t)xdr_ypresp_master, &yprm);
1100 YPUNLOCK();
1101 return (r);
1102 }
1103
1104 int
yp_maplist(char * indomain,struct ypmaplist ** outmaplist)1105 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
1106 {
1107 struct dom_binding *ysd;
1108 struct ypresp_maplist ypml;
1109 struct timeval tv;
1110 int r;
1111
1112 /* Sanity check */
1113
1114 if (indomain == NULL || !strlen(indomain))
1115 return (YPERR_BADARGS);
1116
1117 YPLOCK();
1118 again:
1119 if (_yp_dobind(indomain, &ysd) != 0) {
1120 YPUNLOCK();
1121 return (YPERR_DOMAIN);
1122 }
1123
1124 tv.tv_sec = _yplib_timeout;
1125 tv.tv_usec = 0;
1126
1127 bzero((char *)&ypml, sizeof ypml);
1128
1129 r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
1130 (xdrproc_t)xdr_domainname, &indomain,
1131 (xdrproc_t)xdr_ypresp_maplist, &ypml,tv);
1132 if (r != RPC_SUCCESS) {
1133 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
1134 _yp_unbind(ysd);
1135 goto again;
1136 }
1137 if (!(r = ypprot_err(ypml.stat))) {
1138 *outmaplist = ypml.maps;
1139 }
1140
1141 /* NO: xdr_free((xdrproc_t)xdr_ypresp_maplist, &ypml);*/
1142 YPUNLOCK();
1143 return (r);
1144 }
1145
1146 const char *
yperr_string(int incode)1147 yperr_string(int incode)
1148 {
1149 static char err[80];
1150
1151 switch (incode) {
1152 case 0:
1153 return ("Success");
1154 case YPERR_BADARGS:
1155 return ("Request arguments bad");
1156 case YPERR_RPC:
1157 return ("RPC failure");
1158 case YPERR_DOMAIN:
1159 return ("Can't bind to server which serves this domain");
1160 case YPERR_MAP:
1161 return ("No such map in server's domain");
1162 case YPERR_KEY:
1163 return ("No such key in map");
1164 case YPERR_YPERR:
1165 return ("YP server error");
1166 case YPERR_RESRC:
1167 return ("Local resource allocation failure");
1168 case YPERR_NOMORE:
1169 return ("No more records in map database");
1170 case YPERR_PMAP:
1171 return ("Can't communicate with portmapper");
1172 case YPERR_YPBIND:
1173 return ("Can't communicate with ypbind");
1174 case YPERR_YPSERV:
1175 return ("Can't communicate with ypserv");
1176 case YPERR_NODOM:
1177 return ("Local domain name not set");
1178 case YPERR_BADDB:
1179 return ("Server data base is bad");
1180 case YPERR_VERS:
1181 return ("YP server version mismatch - server can't supply service.");
1182 case YPERR_ACCESS:
1183 return ("Access violation");
1184 case YPERR_BUSY:
1185 return ("Database is busy");
1186 }
1187 sprintf(err, "YP unknown error %d\n", incode);
1188 return (err);
1189 }
1190
1191 int
ypprot_err(unsigned int incode)1192 ypprot_err(unsigned int incode)
1193 {
1194 switch (incode) {
1195 case YP_TRUE:
1196 return (0);
1197 case YP_FALSE:
1198 return (YPERR_YPBIND);
1199 case YP_NOMORE:
1200 return (YPERR_NOMORE);
1201 case YP_NOMAP:
1202 return (YPERR_MAP);
1203 case YP_NODOM:
1204 return (YPERR_DOMAIN);
1205 case YP_NOKEY:
1206 return (YPERR_KEY);
1207 case YP_BADOP:
1208 return (YPERR_YPERR);
1209 case YP_BADDB:
1210 return (YPERR_BADDB);
1211 case YP_YPERR:
1212 return (YPERR_YPERR);
1213 case YP_BADARGS:
1214 return (YPERR_BADARGS);
1215 case YP_VERS:
1216 return (YPERR_VERS);
1217 }
1218 return (YPERR_YPERR);
1219 }
1220
1221 int
_yp_check(char ** dom)1222 _yp_check(char **dom)
1223 {
1224 char *unused;
1225
1226 YPLOCK();
1227 if (_yp_domain[0]=='\0')
1228 if (yp_get_default_domain_locked(&unused)) {
1229 YPUNLOCK();
1230 return (0);
1231 }
1232
1233 if (dom)
1234 *dom = _yp_domain;
1235
1236 if (yp_bind_locked(_yp_domain) == 0) {
1237 yp_unbind_locked(_yp_domain);
1238 YPUNLOCK();
1239 return (1);
1240 }
1241 YPUNLOCK();
1242 return (0);
1243 }
1244