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 * $FreeBSD: src/lib/libc/yp/yplib.c,v 1.51 2007/07/24 13:06:08 simon Exp $
31 */
32
33 #include "namespace.h"
34 #include "reentrant.h"
35 #include <sys/param.h>
36 #include <sys/types.h>
37 #include <sys/socket.h>
38 #include <sys/uio.h>
39 #include <arpa/inet.h>
40 #include <errno.h>
41 #include <fcntl.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 bool_t xdr_ypresp_all_seq(XDR *, u_long *);
53
54 int (*ypresp_allfn)(unsigned long, char *, int, char *, int, void *);
55
56 /*
57 * We have to define these here due to clashes between yp_prot.h and
58 * yp.h.
59 */
60
61 #define YPMATCHCACHE
62
63 #ifdef YPMATCHCACHE
64 struct ypmatch_ent {
65 char *ypc_map;
66 keydat ypc_key;
67 valdat ypc_val;
68 time_t ypc_expire_t;
69 struct ypmatch_ent *ypc_next;
70 };
71 #define YPLIB_MAXCACHE 5 /* At most 5 entries */
72 #define YPLIB_EXPIRE 5 /* Expire after 5 seconds */
73 #endif
74
75 struct dom_binding {
76 struct dom_binding *dom_pnext;
77 char dom_domain[YPMAXDOMAIN + 1];
78 struct sockaddr_in dom_server_addr;
79 u_short dom_server_port;
80 int dom_socket;
81 CLIENT *dom_client;
82 u_short dom_local_port; /* now I finally know what this is for. */
83 long dom_vers;
84 #ifdef YPMATCHCACHE
85 struct ypmatch_ent *cache;
86 int ypmatch_cachecnt;
87 #endif
88 };
89
90 #include <rpcsvc/yp.h>
91 #include <rpcsvc/ypclnt.h>
92
93 #ifndef BINDINGDIR
94 #define BINDINGDIR "/var/yp/binding"
95 #endif
96 #define MAX_RETRIES 20
97
98 void *ypresp_data;
99
100 static void _yp_unbind(struct dom_binding *);
101 struct dom_binding *_ypbindlist;
102 static char _yp_domain[MAXHOSTNAMELEN];
103 int _yplib_timeout = 20;
104
105 static mutex_t _ypmutex = MUTEX_INITIALIZER;
106 #define YPLOCK() mutex_lock(&_ypmutex);
107 #define YPUNLOCK() mutex_unlock(&_ypmutex);
108
109 #ifdef YPMATCHCACHE
110 static void
ypmatch_cache_delete(struct dom_binding * ypdb,struct ypmatch_ent * prev,struct ypmatch_ent * cur)111 ypmatch_cache_delete(struct dom_binding *ypdb, struct ypmatch_ent *prev,
112 struct ypmatch_ent *cur)
113 {
114 if (prev == NULL)
115 ypdb->cache = cur->ypc_next;
116 else
117 prev->ypc_next = cur->ypc_next;
118
119 free(cur->ypc_map);
120 free(cur->ypc_key.keydat_val);
121 free(cur->ypc_val.valdat_val);
122 free(cur);
123
124 ypdb->ypmatch_cachecnt--;
125
126 return;
127 }
128
129 static void
ypmatch_cache_flush(struct dom_binding * ypdb)130 ypmatch_cache_flush(struct dom_binding *ypdb)
131 {
132 struct ypmatch_ent *n, *c = ypdb->cache;
133
134 while (c != NULL) {
135 n = c->ypc_next;
136 ypmatch_cache_delete(ypdb, NULL, c);
137 c = n;
138 }
139
140 return;
141 }
142
143 static void
ypmatch_cache_expire(struct dom_binding * ypdb)144 ypmatch_cache_expire(struct dom_binding *ypdb)
145 {
146 struct ypmatch_ent *c = ypdb->cache;
147 struct ypmatch_ent *n, *p = NULL;
148 time_t t;
149
150 time(&t);
151
152 while (c != NULL) {
153 if (t >= c->ypc_expire_t) {
154 n = c->ypc_next;
155 ypmatch_cache_delete(ypdb, p, c);
156 c = n;
157 } else {
158 p = c;
159 c = c->ypc_next;
160 }
161 }
162
163 return;
164 }
165
166 static void
ypmatch_cache_insert(struct dom_binding * ypdb,char * map,keydat * key,valdat * val)167 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, keydat *key,
168 valdat *val)
169 {
170 struct ypmatch_ent *new;
171
172 /* Do an expire run to maybe open up a slot. */
173 if (ypdb->ypmatch_cachecnt)
174 ypmatch_cache_expire(ypdb);
175
176 /*
177 * If there are no slots free, then force an expire of
178 * the least recently used entry.
179 */
180 if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
181 struct ypmatch_ent *o = NULL, *c = ypdb->cache;
182 time_t oldest = 0;
183
184 oldest = ~oldest;
185
186 while (c != NULL) {
187 if (c->ypc_expire_t < oldest) {
188 oldest = c->ypc_expire_t;
189 o = c;
190 }
191 c = c->ypc_next;
192 }
193
194 if (o == NULL)
195 return;
196 o->ypc_expire_t = 0;
197 ypmatch_cache_expire(ypdb);
198 }
199
200 new = malloc(sizeof(struct ypmatch_ent));
201 if (new == NULL)
202 return;
203
204 new->ypc_map = strdup(map);
205 if (new->ypc_map == NULL) {
206 free(new);
207 return;
208 }
209 new->ypc_key.keydat_val = malloc(key->keydat_len);
210 if (new->ypc_key.keydat_val == NULL) {
211 free(new->ypc_map);
212 free(new);
213 return;
214 }
215 new->ypc_val.valdat_val = malloc(val->valdat_len);
216 if (new->ypc_val.valdat_val == NULL) {
217 free(new->ypc_val.valdat_val);
218 free(new->ypc_map);
219 free(new);
220 return;
221 }
222
223 new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
224 new->ypc_key.keydat_len = key->keydat_len;
225 new->ypc_val.valdat_len = val->valdat_len;
226 bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
227 bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
228
229 new->ypc_next = ypdb->cache;
230 ypdb->cache = new;
231
232 ypdb->ypmatch_cachecnt++;
233
234 return;
235 }
236
237 static bool_t
ypmatch_cache_lookup(struct dom_binding * ypdb,char * map,keydat * key,valdat * val)238 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key,
239 valdat *val)
240 {
241 struct ypmatch_ent *c = ypdb->cache;
242
243 ypmatch_cache_expire(ypdb);
244
245 for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
246 if (strcmp(map, c->ypc_map))
247 continue;
248 if (key->keydat_len != c->ypc_key.keydat_len)
249 continue;
250 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
251 key->keydat_len))
252 continue;
253 }
254
255 if (c == NULL)
256 return(FALSE);
257
258 val->valdat_len = c->ypc_val.valdat_len;
259 val->valdat_val = c->ypc_val.valdat_val;
260
261 return(TRUE);
262 }
263 #endif
264
265 char *
ypbinderr_string(int incode)266 ypbinderr_string(int incode)
267 {
268 const char *errstr;
269 static char err[80];
270 switch (incode) {
271 case 0:
272 errstr = "Success";
273 break;
274 case YPBIND_ERR_ERR:
275 errstr = "Internal ypbind error";
276 break;
277 case YPBIND_ERR_NOSERV:
278 errstr = "Domain not bound";
279 break;
280 case YPBIND_ERR_RESC:
281 errstr = "System resource allocation failure";
282 break;
283 default:
284 errstr = NULL;
285 break;
286 }
287 if (errstr != NULL)
288 strlcpy(err, errstr, sizeof(err));
289 else
290 snprintf(err, sizeof(err), "Unknown ypbind error: #%d\n", incode);
291 return (err);
292 }
293
294 int
_yp_dobind(const char * dom,struct dom_binding ** ypdb)295 _yp_dobind(const char *dom, struct dom_binding **ypdb)
296 {
297 static pid_t pid = -1;
298 char path[MAXPATHLEN];
299 struct dom_binding *ysd, *ysd2;
300 struct ypbind_resp ypbr;
301 struct timeval tv;
302 struct sockaddr_in clnt_sin;
303 int clnt_sock, fd;
304 pid_t gpid;
305 CLIENT *client;
306 int new = 0;
307 ssize_t r;
308 int retries = 0;
309 struct sockaddr_in check;
310 socklen_t checklen = sizeof(struct sockaddr_in);
311
312 /* Not allowed; bad doggie. Bad. */
313 if (strchr(dom, '/') != NULL)
314 return(YPERR_BADARGS);
315
316 gpid = getpid();
317 if (!(pid == -1 || pid == gpid)) {
318 ysd = _ypbindlist;
319 while (ysd) {
320 if (ysd->dom_client != NULL)
321 _yp_unbind(ysd);
322 ysd2 = ysd->dom_pnext;
323 free(ysd);
324 ysd = ysd2;
325 }
326 _ypbindlist = NULL;
327 }
328 pid = gpid;
329
330 if (ypdb != NULL)
331 *ypdb = NULL;
332
333 if (dom == NULL || strlen(dom) == 0)
334 return (YPERR_BADARGS);
335
336 for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
337 if (strcmp(dom, ysd->dom_domain) == 0)
338 break;
339
340
341 if (ysd == NULL) {
342 ysd = (struct dom_binding *)malloc(sizeof *ysd);
343 bzero((char *)ysd, sizeof *ysd);
344 ysd->dom_socket = -1;
345 ysd->dom_vers = 0;
346 new = 1;
347 } else {
348 /* Check the socket -- may have been hosed by the caller. */
349 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check,
350 &checklen) == -1 || check.sin_family != AF_INET ||
351 check.sin_port != ysd->dom_local_port) {
352 /* Socket became bogus somehow... need to rebind. */
353 int save, sock;
354
355 sock = ysd->dom_socket;
356 save = _dup(ysd->dom_socket);
357 if (ysd->dom_client != NULL)
358 clnt_destroy(ysd->dom_client);
359 ysd->dom_vers = 0;
360 ysd->dom_client = NULL;
361 sock = _dup2(save, sock);
362 _close(save);
363 }
364 }
365
366 again:
367 retries++;
368 if (retries > MAX_RETRIES) {
369 if (new)
370 free(ysd);
371 return(YPERR_YPBIND);
372 }
373 #ifdef BINDINGDIR
374 if (ysd->dom_vers == 0) {
375 /*
376 * We're trying to make a new binding: zorch the
377 * existing handle now (if any).
378 */
379 if (ysd->dom_client != NULL) {
380 clnt_destroy(ysd->dom_client);
381 ysd->dom_client = NULL;
382 ysd->dom_socket = -1;
383 }
384 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
385 if ((fd = _open(path, O_RDONLY | O_CLOEXEC)) == -1) {
386 /* no binding file, YP is dead. */
387 /* Try to bring it back to life. */
388 _close(fd);
389 goto skipit;
390 }
391 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
392 struct iovec iov[2];
393 struct ypbind_resp ybr;
394 u_short ypb_port;
395
396 iov[0].iov_base = (caddr_t)&ypb_port;
397 iov[0].iov_len = sizeof ypb_port;
398 iov[1].iov_base = (caddr_t)&ybr;
399 iov[1].iov_len = sizeof ybr;
400
401 r = _readv(fd, iov, 2);
402 if (r != (ssize_t)(iov[0].iov_len + iov[1].iov_len)) {
403 _close(fd);
404 ysd->dom_vers = -1;
405 goto again;
406 }
407
408 bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
409 ysd->dom_server_addr.sin_family = AF_INET;
410 ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
411 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
412 &ysd->dom_server_addr.sin_addr.s_addr,
413 sizeof(ysd->dom_server_addr.sin_addr.s_addr));
414 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
415 &ysd->dom_server_addr.sin_port,
416 sizeof(ysd->dom_server_addr.sin_port));
417
418 ysd->dom_server_port = ysd->dom_server_addr.sin_port;
419 _close(fd);
420 goto gotit;
421 } else {
422 /* no lock on binding file, YP is dead. */
423 /* Try to bring it back to life. */
424 _close(fd);
425 goto skipit;
426 }
427 }
428 skipit:
429 #endif
430 if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
431 /*
432 * We're trying to make a new binding: zorch the
433 * existing handle now (if any).
434 */
435 if (ysd->dom_client != NULL) {
436 clnt_destroy(ysd->dom_client);
437 ysd->dom_client = NULL;
438 ysd->dom_socket = -1;
439 }
440 bzero((char *)&clnt_sin, sizeof clnt_sin);
441 clnt_sin.sin_family = AF_INET;
442 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
443
444 clnt_sock = RPC_ANYSOCK;
445 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
446 0, 0);
447 if (client == NULL) {
448 /*
449 * These conditions indicate ypbind just isn't
450 * alive -- we probably don't want to shoot our
451 * mouth off in this case; instead generate error
452 * messages only for really exotic problems.
453 */
454 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
455 (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
456 rpc_createerr.cf_error.re_errno == ECONNREFUSED))
457 clnt_pcreateerror("clnttcp_create");
458 if (new)
459 free(ysd);
460 return (YPERR_YPBIND);
461 }
462
463 /*
464 * Check the port number -- should be < IPPORT_RESERVED.
465 * If not, it's possible someone has registered a bogus
466 * ypbind with the portmapper and is trying to trick us.
467 */
468 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
469 if (client != NULL)
470 clnt_destroy(client);
471 if (new)
472 free(ysd);
473 return(YPERR_YPBIND);
474 }
475 tv.tv_sec = _yplib_timeout/2;
476 tv.tv_usec = 0;
477 r = clnt_call(client, YPBINDPROC_DOMAIN,
478 (xdrproc_t)xdr_domainname, &dom,
479 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
480 if (r != RPC_SUCCESS) {
481 clnt_destroy(client);
482 ysd->dom_vers = -1;
483 if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
484 if (new)
485 free(ysd);
486 return(YPERR_YPBIND);
487 }
488 fprintf(stderr,
489 "YP: server for domain %s not responding, retrying\n", dom);
490 goto again;
491 } else {
492 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
493 struct timespec time_to_sleep, time_remaining;
494
495 clnt_destroy(client);
496 ysd->dom_vers = -1;
497
498 time_to_sleep.tv_sec = _yplib_timeout/2;
499 time_to_sleep.tv_nsec = 0;
500 _nanosleep(&time_to_sleep,
501 &time_remaining);
502 goto again;
503 }
504 }
505 clnt_destroy(client);
506
507 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
508 ysd->dom_server_addr.sin_family = AF_INET;
509 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
510 &ysd->dom_server_addr.sin_port,
511 sizeof(ysd->dom_server_addr.sin_port));
512 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
513 &ysd->dom_server_addr.sin_addr.s_addr,
514 sizeof(ysd->dom_server_addr.sin_addr.s_addr));
515
516 /*
517 * We could do a reserved port check here too, but this
518 * could pose compatibility problems. The local ypbind is
519 * supposed to decide whether or not to trust yp servers
520 * on insecure ports. For now, we trust its judgement.
521 */
522 ysd->dom_server_port =
523 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
524 gotit:
525 ysd->dom_vers = YPVERS;
526 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
527 }
528
529 /* Don't rebuild the connection to the server unless we have to. */
530 if (ysd->dom_client == NULL) {
531 tv.tv_sec = _yplib_timeout/2;
532 tv.tv_usec = 0;
533 ysd->dom_socket = RPC_ANYSOCK;
534 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
535 YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
536 if (ysd->dom_client == NULL) {
537 clnt_pcreateerror("clntudp_create");
538 ysd->dom_vers = -1;
539 goto again;
540 }
541 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
542 perror("fcntl: F_SETFD");
543 /*
544 * We want a port number associated with this socket
545 * so that we can check its authenticity later.
546 */
547 checklen = sizeof(struct sockaddr_in);
548 bzero((char *)&check, checklen);
549 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
550 check.sin_family = AF_INET;
551 if (!_getsockname(ysd->dom_socket,
552 (struct sockaddr *)&check, &checklen)) {
553 ysd->dom_local_port = check.sin_port;
554 } else {
555 clnt_destroy(ysd->dom_client);
556 if (new)
557 free(ysd);
558 return(YPERR_YPBIND);
559 }
560 }
561
562 if (new) {
563 ysd->dom_pnext = _ypbindlist;
564 _ypbindlist = ysd;
565 }
566
567 /*
568 * Set low retry timeout to realistically handle UDP packet
569 * loss for YP packet bursts.
570 */
571 tv.tv_sec = 1;
572 tv.tv_usec = 0;
573 clnt_control(ysd->dom_client, CLSET_RETRY_TIMEOUT, (char*)&tv);
574
575 if (ypdb != NULL)
576 *ypdb = ysd;
577 return (0);
578 }
579
580 static void
_yp_unbind(struct dom_binding * ypb)581 _yp_unbind(struct dom_binding *ypb)
582 {
583 struct sockaddr_in check;
584 socklen_t checklen = sizeof(struct sockaddr_in);
585
586 if (ypb->dom_client != NULL) {
587 /* Check the socket -- may have been hosed by the caller. */
588 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check,
589 &checklen) == -1 || check.sin_family != AF_INET ||
590 check.sin_port != ypb->dom_local_port) {
591 int save, sock;
592
593 sock = ypb->dom_socket;
594 save = _dup(ypb->dom_socket);
595 clnt_destroy(ypb->dom_client);
596 sock = _dup2(save, sock);
597 _close(save);
598 } else
599 clnt_destroy(ypb->dom_client);
600 }
601
602 ypb->dom_client = NULL;
603 ypb->dom_socket = -1;
604 ypb->dom_vers = -1;
605 #ifdef YPMATCHCACHE
606 ypmatch_cache_flush(ypb);
607 #endif
608 }
609
610 static int
yp_bind_locked(char * dom)611 yp_bind_locked(char *dom)
612 {
613 return (_yp_dobind(dom, NULL));
614 }
615
616 int
yp_bind(char * dom)617 yp_bind(char *dom)
618 {
619 int r;
620
621 YPLOCK();
622 r = yp_bind_locked(dom);
623 YPUNLOCK();
624 return (r);
625 }
626
627 static void
yp_unbind_locked(char * dom)628 yp_unbind_locked(char *dom)
629 {
630 struct dom_binding *ypb, *ypbp;
631
632 ypbp = NULL;
633 for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
634 if (strcmp(dom, ypb->dom_domain) == 0) {
635 _yp_unbind(ypb);
636 if (ypbp)
637 ypbp->dom_pnext = ypb->dom_pnext;
638 else
639 _ypbindlist = ypb->dom_pnext;
640 free(ypb);
641 return;
642 }
643 ypbp = ypb;
644 }
645 return;
646 }
647
648 void
yp_unbind(char * dom)649 yp_unbind(char *dom)
650 {
651 YPLOCK();
652 yp_unbind_locked(dom);
653 YPUNLOCK();
654 }
655
656 int
yp_match(char * indomain,char * inmap,const char * inkey,int inkeylen,char ** outval,int * outvallen)657 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
658 char **outval, int *outvallen)
659 {
660 struct dom_binding *ysd;
661 struct ypresp_val yprv;
662 struct timeval tv;
663 struct ypreq_key yprk;
664 int r;
665
666 *outval = NULL;
667 *outvallen = 0;
668
669 /* Sanity check */
670
671 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
672 inmap == NULL || !strlen(inmap) ||
673 indomain == NULL || !strlen(indomain))
674 return (YPERR_BADARGS);
675
676 YPLOCK();
677 if (_yp_dobind(indomain, &ysd) != 0) {
678 YPUNLOCK();
679 return(YPERR_DOMAIN);
680 }
681
682 yprk.domain = indomain;
683 yprk.map = inmap;
684 yprk.key.keydat_val = (char *)inkey;
685 yprk.key.keydat_len = inkeylen;
686
687 #ifdef YPMATCHCACHE
688 if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
689 /*
690 if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
691 inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
692 */
693 *outvallen = yprv.val.valdat_len;
694 *outval = (char *)malloc(*outvallen+1);
695 bcopy(yprv.val.valdat_val, *outval, *outvallen);
696 (*outval)[*outvallen] = '\0';
697 YPUNLOCK();
698 return (0);
699 }
700 #endif
701
702 again:
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 goto again;
720 }
721
722 if (!(r = ypprot_err(yprv.stat))) {
723 *outvallen = yprv.val.valdat_len;
724 *outval = (char *)malloc(*outvallen+1);
725 bcopy(yprv.val.valdat_val, *outval, *outvallen);
726 (*outval)[*outvallen] = '\0';
727 #ifdef YPMATCHCACHE
728 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
729 #endif
730 }
731
732 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
733 YPUNLOCK();
734 return (r);
735 }
736
737 static int
yp_get_default_domain_locked(char ** domp)738 yp_get_default_domain_locked(char **domp)
739 {
740 *domp = NULL;
741 if (_yp_domain[0] == '\0')
742 if (getdomainname(_yp_domain, sizeof _yp_domain))
743 return (YPERR_NODOM);
744 *domp = _yp_domain;
745 return (0);
746 }
747
748 int
yp_get_default_domain(char ** domp)749 yp_get_default_domain(char **domp)
750 {
751 int r;
752
753 YPLOCK();
754 r = yp_get_default_domain_locked(domp);
755 YPUNLOCK();
756 return (r);
757 }
758
759 int
yp_first(char * indomain,char * inmap,char ** outkey,int * outkeylen,char ** outval,int * outvallen)760 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen,
761 char **outval, int *outvallen)
762 {
763 struct ypresp_key_val yprkv;
764 struct ypreq_nokey yprnk;
765 struct dom_binding *ysd;
766 struct timeval tv;
767 int r;
768
769 /* Sanity check */
770
771 if (indomain == NULL || !strlen(indomain) ||
772 inmap == NULL || !strlen(inmap))
773 return (YPERR_BADARGS);
774
775 *outkey = *outval = NULL;
776 *outkeylen = *outvallen = 0;
777
778 YPLOCK();
779 again:
780 if (_yp_dobind(indomain, &ysd) != 0) {
781 YPUNLOCK();
782 return (YPERR_DOMAIN);
783 }
784
785 tv.tv_sec = _yplib_timeout;
786 tv.tv_usec = 0;
787
788 yprnk.domain = indomain;
789 yprnk.map = inmap;
790 bzero((char *)&yprkv, sizeof yprkv);
791
792 r = clnt_call(ysd->dom_client, YPPROC_FIRST,
793 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
794 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
795 if (r != RPC_SUCCESS) {
796 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
797 _yp_unbind(ysd);
798 goto again;
799 }
800 if (!(r = ypprot_err(yprkv.stat))) {
801 *outkeylen = yprkv.key.keydat_len;
802 *outkey = (char *)malloc(*outkeylen+1);
803 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
804 (*outkey)[*outkeylen] = '\0';
805 *outvallen = yprkv.val.valdat_len;
806 *outval = (char *)malloc(*outvallen+1);
807 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
808 (*outval)[*outvallen] = '\0';
809 }
810
811 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
812 YPUNLOCK();
813 return (r);
814 }
815
816 int
yp_next(char * indomain,char * inmap,char * inkey,int inkeylen,char ** outkey,int * outkeylen,char ** outval,int * outvallen)817 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen,
818 char **outkey, int *outkeylen, char **outval, int *outvallen)
819 {
820 struct ypresp_key_val yprkv;
821 struct ypreq_key yprk;
822 struct dom_binding *ysd;
823 struct timeval tv;
824 int r;
825
826 /* Sanity check */
827
828 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
829 inmap == NULL || !strlen(inmap) ||
830 indomain == NULL || !strlen(indomain))
831 return (YPERR_BADARGS);
832
833 *outkey = *outval = NULL;
834 *outkeylen = *outvallen = 0;
835
836 YPLOCK();
837 again:
838 if (_yp_dobind(indomain, &ysd) != 0) {
839 YPUNLOCK();
840 return (YPERR_DOMAIN);
841 }
842
843 tv.tv_sec = _yplib_timeout;
844 tv.tv_usec = 0;
845
846 yprk.domain = indomain;
847 yprk.map = inmap;
848 yprk.key.keydat_val = inkey;
849 yprk.key.keydat_len = inkeylen;
850 bzero((char *)&yprkv, sizeof yprkv);
851
852 r = clnt_call(ysd->dom_client, YPPROC_NEXT,
853 (xdrproc_t)xdr_ypreq_key, &yprk,
854 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
855 if (r != RPC_SUCCESS) {
856 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
857 _yp_unbind(ysd);
858 goto again;
859 }
860 if (!(r = ypprot_err(yprkv.stat))) {
861 *outkeylen = yprkv.key.keydat_len;
862 *outkey = (char *)malloc(*outkeylen+1);
863 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
864 (*outkey)[*outkeylen] = '\0';
865 *outvallen = yprkv.val.valdat_len;
866 *outval = (char *)malloc(*outvallen+1);
867 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
868 (*outval)[*outvallen] = '\0';
869 }
870
871 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
872 YPUNLOCK();
873 return (r);
874 }
875
876 int
yp_all(char * indomain,char * inmap,struct ypall_callback * incallback)877 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
878 {
879 struct ypreq_nokey yprnk;
880 struct dom_binding *ysd;
881 struct timeval tv;
882 struct sockaddr_in clnt_sin;
883 CLIENT *clnt;
884 u_long status, savstat;
885 int clnt_sock;
886
887 /* Sanity check */
888
889 if (indomain == NULL || !strlen(indomain) ||
890 inmap == NULL || !strlen(inmap))
891 return (YPERR_BADARGS);
892
893 YPLOCK();
894 again:
895
896 if (_yp_dobind(indomain, &ysd) != 0) {
897 YPUNLOCK();
898 return (YPERR_DOMAIN);
899 }
900
901 tv.tv_sec = _yplib_timeout;
902 tv.tv_usec = 0;
903
904 /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
905
906 clnt_sock = RPC_ANYSOCK;
907 clnt_sin = ysd->dom_server_addr;
908 clnt_sin.sin_port = 0;
909 clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
910 if (clnt == NULL) {
911 YPUNLOCK();
912 printf("clnttcp_create failed\n");
913 return (YPERR_PMAP);
914 }
915
916 yprnk.domain = indomain;
917 yprnk.map = inmap;
918 ypresp_allfn = incallback->foreach;
919 ypresp_data = (void *)incallback->data;
920
921 if (clnt_call(clnt, YPPROC_ALL,
922 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
923 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
924 clnt_perror(ysd->dom_client, "yp_all: clnt_call");
925 clnt_destroy(clnt);
926 _yp_unbind(ysd);
927 goto again;
928 }
929
930 clnt_destroy(clnt);
931 savstat = status;
932 xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status); /* not really needed... */
933 YPUNLOCK();
934 if (savstat != YP_NOMORE)
935 return (ypprot_err(savstat));
936 return (0);
937 }
938
939 int
yp_order(char * indomain,char * inmap,int * outorder)940 yp_order(char *indomain, char *inmap, int *outorder)
941 {
942 struct dom_binding *ysd;
943 struct ypresp_order ypro;
944 struct ypreq_nokey yprnk;
945 struct timeval tv;
946 int r;
947
948 /* Sanity check */
949
950 if (indomain == NULL || !strlen(indomain) ||
951 inmap == NULL || !strlen(inmap))
952 return (YPERR_BADARGS);
953
954 YPLOCK();
955 again:
956 if (_yp_dobind(indomain, &ysd) != 0) {
957 YPUNLOCK();
958 return (YPERR_DOMAIN);
959 }
960
961 tv.tv_sec = _yplib_timeout;
962 tv.tv_usec = 0;
963
964 yprnk.domain = indomain;
965 yprnk.map = inmap;
966
967 bzero((char *)(char *)&ypro, sizeof ypro);
968
969 r = clnt_call(ysd->dom_client, YPPROC_ORDER,
970 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
971 (xdrproc_t)xdr_ypresp_order, &ypro, tv);
972
973 /*
974 * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
975 * procedure.
976 */
977 if (r == RPC_PROCUNAVAIL) {
978 YPUNLOCK();
979 return(YPERR_YPERR);
980 }
981
982 if (r != RPC_SUCCESS) {
983 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
984 _yp_unbind(ysd);
985 goto again;
986 }
987
988 if (!(r = ypprot_err(ypro.stat))) {
989 *outorder = ypro.ordernum;
990 }
991
992 xdr_free((xdrproc_t)xdr_ypresp_order, &ypro);
993 YPUNLOCK();
994 return (r);
995 }
996
997 int
yp_master(char * indomain,char * inmap,char ** outname)998 yp_master(char *indomain, char *inmap, char **outname)
999 {
1000 struct dom_binding *ysd;
1001 struct ypresp_master yprm;
1002 struct ypreq_nokey yprnk;
1003 struct timeval tv;
1004 int r;
1005
1006 /* Sanity check */
1007
1008 if (indomain == NULL || !strlen(indomain) ||
1009 inmap == NULL || !strlen(inmap))
1010 return (YPERR_BADARGS);
1011 YPLOCK();
1012 again:
1013 if (_yp_dobind(indomain, &ysd) != 0) {
1014 YPUNLOCK();
1015 return (YPERR_DOMAIN);
1016 }
1017
1018 tv.tv_sec = _yplib_timeout;
1019 tv.tv_usec = 0;
1020
1021 yprnk.domain = indomain;
1022 yprnk.map = inmap;
1023
1024 bzero((char *)&yprm, sizeof yprm);
1025
1026 r = clnt_call(ysd->dom_client, YPPROC_MASTER,
1027 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
1028 (xdrproc_t)xdr_ypresp_master, &yprm, tv);
1029 if (r != RPC_SUCCESS) {
1030 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
1031 _yp_unbind(ysd);
1032 goto again;
1033 }
1034
1035 if (!(r = ypprot_err(yprm.stat))) {
1036 *outname = (char *)strdup(yprm.peer);
1037 }
1038
1039 xdr_free((xdrproc_t)xdr_ypresp_master, &yprm);
1040 YPUNLOCK();
1041 return (r);
1042 }
1043
1044 int
yp_maplist(char * indomain,struct ypmaplist ** outmaplist)1045 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
1046 {
1047 struct dom_binding *ysd;
1048 struct ypresp_maplist ypml;
1049 struct timeval tv;
1050 int r;
1051
1052 /* Sanity check */
1053
1054 if (indomain == NULL || !strlen(indomain))
1055 return (YPERR_BADARGS);
1056
1057 YPLOCK();
1058 again:
1059 if (_yp_dobind(indomain, &ysd) != 0) {
1060 YPUNLOCK();
1061 return (YPERR_DOMAIN);
1062 }
1063
1064 tv.tv_sec = _yplib_timeout;
1065 tv.tv_usec = 0;
1066
1067 bzero((char *)&ypml, sizeof ypml);
1068
1069 r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
1070 (xdrproc_t)xdr_domainname, &indomain,
1071 (xdrproc_t)xdr_ypresp_maplist, &ypml, tv);
1072 if (r != RPC_SUCCESS) {
1073 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
1074 _yp_unbind(ysd);
1075 goto again;
1076 }
1077 if (!(r = ypprot_err(ypml.stat))) {
1078 *outmaplist = ypml.maps;
1079 }
1080
1081 /* NO: xdr_free((xdrproc_t)xdr_ypresp_maplist, &ypml);*/
1082 YPUNLOCK();
1083 return (r);
1084 }
1085
1086 char *
yperr_string(int incode)1087 yperr_string(int incode)
1088 {
1089 const char *errstr;
1090 static char err[80];
1091
1092 switch (incode) {
1093 case 0:
1094 errstr = "Success";
1095 break;
1096 case YPERR_BADARGS:
1097 errstr = "Request arguments bad";
1098 break;
1099 case YPERR_RPC:
1100 errstr = "RPC failure";
1101 break;
1102 case YPERR_DOMAIN:
1103 errstr = "Can't bind to server which serves this domain";
1104 break;
1105 case YPERR_MAP:
1106 errstr = "No such map in server's domain";
1107 break;
1108 case YPERR_KEY:
1109 errstr = "No such key in map";
1110 break;
1111 case YPERR_YPERR:
1112 errstr = "YP server error";
1113 break;
1114 case YPERR_RESRC:
1115 errstr = "Local resource allocation failure";
1116 break;
1117 case YPERR_NOMORE:
1118 errstr = "No more records in map database";
1119 break;
1120 case YPERR_PMAP:
1121 errstr = "Can't communicate with portmapper";
1122 break;
1123 case YPERR_YPBIND:
1124 errstr = "Can't communicate with ypbind";
1125 break;
1126 case YPERR_YPSERV:
1127 errstr = "Can't communicate with ypserv";
1128 break;
1129 case YPERR_NODOM:
1130 errstr = "Local domain name not set";
1131 break;
1132 case YPERR_BADDB:
1133 errstr = "Server data base is bad";
1134 break;
1135 case YPERR_VERS:
1136 errstr = "YP server version mismatch - server can't supply service.";
1137 break;
1138 case YPERR_ACCESS:
1139 errstr = "Access violation";
1140 break;
1141 case YPERR_BUSY:
1142 errstr = "Database is busy";
1143 break;
1144 default:
1145 errstr = NULL;
1146 break;
1147 }
1148 if (errstr != NULL)
1149 strlcpy(err, errstr, sizeof(err));
1150 else
1151 snprintf(err, sizeof(err), "YP unknown error %d\n", incode);
1152 return (err);
1153 }
1154
1155 int
ypprot_err(unsigned int incode)1156 ypprot_err(unsigned int incode)
1157 {
1158 switch (incode) {
1159 case YP_TRUE:
1160 return (0);
1161 case YP_FALSE:
1162 return (YPERR_YPBIND);
1163 case YP_NOMORE:
1164 return (YPERR_NOMORE);
1165 case YP_NOMAP:
1166 return (YPERR_MAP);
1167 case YP_NODOM:
1168 return (YPERR_DOMAIN);
1169 case YP_NOKEY:
1170 return (YPERR_KEY);
1171 case YP_BADOP:
1172 return (YPERR_YPERR);
1173 case YP_BADDB:
1174 return (YPERR_BADDB);
1175 case YP_YPERR:
1176 return (YPERR_YPERR);
1177 case YP_BADARGS:
1178 return (YPERR_BADARGS);
1179 case YP_VERS:
1180 return (YPERR_VERS);
1181 }
1182 return (YPERR_YPERR);
1183 }
1184
1185 int
_yp_check(char ** dom)1186 _yp_check(char **dom)
1187 {
1188 char *unused;
1189
1190 YPLOCK();
1191 if (_yp_domain[0]=='\0')
1192 if (yp_get_default_domain_locked(&unused)) {
1193 YPUNLOCK();
1194 return (0);
1195 }
1196
1197 if (dom)
1198 *dom = _yp_domain;
1199
1200 if (yp_bind_locked(_yp_domain) == 0) {
1201 yp_unbind_locked(_yp_domain);
1202 YPUNLOCK();
1203 return (1);
1204 }
1205 YPUNLOCK();
1206 return (0);
1207 }
1208