AMD64 - yp functions take pointers to int, not pointers to size_t.
[dragonfly.git] / lib / libc / yp / yplib.c
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  * $DragonFly: src/lib/libc/yp/yplib.c,v 1.9 2006/08/03 16:40:46 swildner Exp $
32  */
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 bool_t  xdr_ypresp_all_seq(XDR *, u_long *);
54 int     _yp_check(char **);
55
56 int (*ypresp_allfn)(unsigned long, char *, int, char *, int, void *);
57
58 /*
59  * We have to define these here due to clashes between yp_prot.h and
60  * yp.h.
61  */
62
63 #define YPMATCHCACHE
64
65 #ifdef YPMATCHCACHE
66 struct ypmatch_ent {
67         char                    *ypc_map;
68         keydat                  ypc_key;
69         valdat                  ypc_val;
70         time_t                  ypc_expire_t;
71         struct ypmatch_ent      *ypc_next;
72 };
73 #define YPLIB_MAXCACHE  5       /* At most 5 entries */
74 #define YPLIB_EXPIRE    5       /* Expire after 5 seconds */
75 #endif
76
77 struct dom_binding {
78         struct dom_binding *dom_pnext;
79         char dom_domain[YPMAXDOMAIN + 1];
80         struct sockaddr_in dom_server_addr;
81         u_short dom_server_port;
82         int dom_socket;
83         CLIENT *dom_client;
84         u_short dom_local_port; /* now I finally know what this is for. */
85         long dom_vers;
86 #ifdef YPMATCHCACHE
87         struct ypmatch_ent *cache;
88         int ypmatch_cachecnt;
89 #endif
90 };
91
92 #include <rpcsvc/yp.h>
93 #include <rpcsvc/ypclnt.h>
94
95 #ifndef BINDINGDIR
96 #define BINDINGDIR "/var/yp/binding"
97 #endif
98 #define MAX_RETRIES 20
99
100 void *ypresp_data;
101
102 static void _yp_unbind(struct dom_binding *);
103 struct dom_binding *_ypbindlist;
104 static char _yp_domain[MAXHOSTNAMELEN];
105 int _yplib_timeout = 20;
106
107 static mutex_t _ypmutex = MUTEX_INITIALIZER;
108 #define YPLOCK()        mutex_lock(&_ypmutex);
109 #define YPUNLOCK()      mutex_unlock(&_ypmutex);
110
111 #ifdef YPMATCHCACHE
112 static void
113 ypmatch_cache_delete(struct dom_binding *ypdb, struct ypmatch_ent *prev,
114     struct ypmatch_ent *cur)
115 {
116         if (prev == NULL)
117                 ypdb->cache = cur->ypc_next;
118         else
119                 prev->ypc_next = cur->ypc_next;
120
121         free(cur->ypc_map);
122         free(cur->ypc_key.keydat_val);
123         free(cur->ypc_val.valdat_val);
124         free(cur);
125
126         ypdb->ypmatch_cachecnt--;
127
128         return;
129 }
130
131 static void
132 ypmatch_cache_flush(struct dom_binding *ypdb)
133 {
134         struct ypmatch_ent      *n, *c = ypdb->cache;
135
136         while (c != NULL) {
137                 n = c->ypc_next;
138                 ypmatch_cache_delete(ypdb, NULL, c);
139                 c = n;
140         }
141
142         return;
143 }
144
145 static void
146 ypmatch_cache_expire(struct dom_binding *ypdb)
147 {
148         struct ypmatch_ent      *c = ypdb->cache;
149         struct ypmatch_ent      *n, *p = NULL;
150         time_t                  t;
151
152         time(&t);
153
154         while (c != NULL) {
155                 if (t >= c->ypc_expire_t) {
156                         n = c->ypc_next;
157                         ypmatch_cache_delete(ypdb, p, c);
158                         c = n;
159                 } else {
160                         p = c;
161                         c = c->ypc_next;
162                 }
163         }
164
165         return;
166 }
167
168 static void
169 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, keydat *key,
170     valdat *val)
171 {
172         struct ypmatch_ent      *new;
173
174         /* Do an expire run to maybe open up a slot. */
175         if (ypdb->ypmatch_cachecnt)
176                 ypmatch_cache_expire(ypdb);
177
178         /*
179          * If there are no slots free, then force an expire of
180          * the least recently used entry.
181          */
182         if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
183                 struct ypmatch_ent      *o = NULL, *c = ypdb->cache;
184                 time_t                  oldest = 0;
185
186                 oldest = ~oldest;
187
188                 while (c != NULL) {
189                         if (c->ypc_expire_t < oldest) {
190                                 oldest = c->ypc_expire_t;
191                                 o = c;
192                         }
193                         c = c->ypc_next;
194                 }
195
196                 if (o == NULL)
197                         return;
198                 o->ypc_expire_t = 0;
199                 ypmatch_cache_expire(ypdb);
200         }
201
202         new = malloc(sizeof(struct ypmatch_ent));
203         if (new == NULL)
204                 return;
205
206         new->ypc_map = strdup(map);
207         if (new->ypc_map == NULL) {
208                 free(new);
209                 return;
210         }
211         new->ypc_key.keydat_val = malloc(key->keydat_len);
212         if (new->ypc_key.keydat_val == NULL) {
213                 free(new->ypc_map);
214                 free(new);
215                 return;
216         }
217         new->ypc_val.valdat_val = malloc(val->valdat_len);
218         if (new->ypc_val.valdat_val == NULL) {
219                 free(new->ypc_val.valdat_val);
220                 free(new->ypc_map);
221                 free(new);
222                 return;
223         }
224
225         new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
226         new->ypc_key.keydat_len = key->keydat_len;
227         new->ypc_val.valdat_len = val->valdat_len;
228         bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
229         bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
230
231         new->ypc_next = ypdb->cache;
232         ypdb->cache = new;
233
234         ypdb->ypmatch_cachecnt++;
235
236         return;
237 }
238
239 static bool_t
240 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key,
241     valdat *val)
242 {
243         struct ypmatch_ent      *c = ypdb->cache;
244
245         ypmatch_cache_expire(ypdb);
246
247         for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
248                 if (strcmp(map, c->ypc_map))
249                         continue;
250                 if (key->keydat_len != c->ypc_key.keydat_len)
251                         continue;
252                 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
253                                 key->keydat_len))
254                         continue;
255         }
256
257         if (c == NULL)
258                 return(FALSE);
259
260         val->valdat_len = c->ypc_val.valdat_len;
261         val->valdat_val = c->ypc_val.valdat_val;
262
263         return(TRUE);
264 }
265 #endif
266
267 char *
268 ypbinderr_string(int incode)
269 {
270         const char *errstr;
271         static char err[80];
272         switch (incode) {
273         case 0:
274                 errstr = "Success";
275                 break;
276         case YPBIND_ERR_ERR:
277                 errstr = "Internal ypbind error";
278                 break;
279         case YPBIND_ERR_NOSERV:
280                 errstr = "Domain not bound";
281                 break;
282         case YPBIND_ERR_RESC:
283                 errstr = "System resource allocation failure";
284                 break;
285         default:
286                 errstr = NULL;
287                 break;
288         }
289         if (errstr != NULL)
290                 strlcpy(err, errstr, sizeof(err));
291         else
292                 snprintf(err, sizeof(err), "Unknown ypbind error: #%d\n", incode);
293         return (err);
294 }
295
296 int
297 _yp_dobind(const char *dom, struct dom_binding **ypdb)
298 {
299         static pid_t pid = -1;
300         char path[MAXPATHLEN];
301         struct dom_binding *ysd, *ysd2;
302         struct ypbind_resp ypbr;
303         struct timeval tv;
304         struct sockaddr_in clnt_sin;
305         int clnt_sock, fd;
306         pid_t gpid;
307         CLIENT *client;
308         int new = 0;
309         ssize_t r;
310         int retries = 0;
311         struct sockaddr_in check;
312         socklen_t checklen = sizeof(struct sockaddr_in);
313
314         /* Not allowed; bad doggie. Bad. */
315         if (strchr(dom, '/') != NULL)
316                 return(YPERR_BADARGS);
317
318         gpid = getpid();
319         if (!(pid == -1 || pid == gpid)) {
320                 ysd = _ypbindlist;
321                 while (ysd) {
322                         if (ysd->dom_client != NULL)
323                                 _yp_unbind(ysd);
324                         ysd2 = ysd->dom_pnext;
325                         free(ysd);
326                         ysd = ysd2;
327                 }
328                 _ypbindlist = NULL;
329         }
330         pid = gpid;
331
332         if (ypdb != NULL)
333                 *ypdb = NULL;
334
335         if (dom == NULL || strlen(dom) == 0)
336                 return (YPERR_BADARGS);
337
338         for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
339                 if (strcmp(dom, ysd->dom_domain) == 0)
340                         break;
341
342
343         if (ysd == NULL) {
344                 ysd = (struct dom_binding *)malloc(sizeof *ysd);
345                 bzero((char *)ysd, sizeof *ysd);
346                 ysd->dom_socket = -1;
347                 ysd->dom_vers = 0;
348                 new = 1;
349         } else {
350         /* Check the socket -- may have been hosed by the caller. */
351                 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check,
352                     &checklen) == -1 || check.sin_family != AF_INET ||
353                     check.sin_port != ysd->dom_local_port) {
354                 /* Socket became bogus somehow... need to rebind. */
355                         int save, sock;
356
357                         sock = ysd->dom_socket;
358                         save = _dup(ysd->dom_socket);
359                         if (ysd->dom_client != NULL)
360                                 clnt_destroy(ysd->dom_client);
361                         ysd->dom_vers = 0;
362                         ysd->dom_client = NULL;
363                         sock = _dup2(save, sock);
364                         _close(save);
365                 }
366         }
367
368 again:
369         retries++;
370         if (retries > MAX_RETRIES) {
371                 if (new)
372                         free(ysd);
373                 return(YPERR_YPBIND);
374         }
375 #ifdef BINDINGDIR
376         if (ysd->dom_vers == 0) {
377                 /*
378                  * We're trying to make a new binding: zorch the
379                  * existing handle now (if any).
380                  */
381                 if (ysd->dom_client != NULL) {
382                         clnt_destroy(ysd->dom_client);
383                         ysd->dom_client = NULL;
384                         ysd->dom_socket = -1;
385                 }
386                 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
387                 if ((fd = _open(path, O_RDONLY)) == -1) {
388                         /* no binding file, YP is dead. */
389                         /* Try to bring it back to life. */
390                         _close(fd);
391                         goto skipit;
392                 }
393                 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
394                         struct iovec iov[2];
395                         struct ypbind_resp ybr;
396                         u_short ypb_port;
397
398                         iov[0].iov_base = (caddr_t)&ypb_port;
399                         iov[0].iov_len = sizeof ypb_port;
400                         iov[1].iov_base = (caddr_t)&ybr;
401                         iov[1].iov_len = sizeof ybr;
402
403                         r = _readv(fd, iov, 2);
404                         if (r != (ssize_t)(iov[0].iov_len + iov[1].iov_len)) {
405                                 _close(fd);
406                                 ysd->dom_vers = -1;
407                                 goto again;
408                         }
409
410                         bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
411                         ysd->dom_server_addr.sin_family = AF_INET;
412                         ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
413                         bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
414                             &ysd->dom_server_addr.sin_addr.s_addr,
415                             sizeof(ysd->dom_server_addr.sin_addr.s_addr));
416                         bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
417                             &ysd->dom_server_addr.sin_port,
418                             sizeof(ysd->dom_server_addr.sin_port));
419
420                         ysd->dom_server_port = ysd->dom_server_addr.sin_port;
421                         _close(fd);
422                         goto gotit;
423                 } else {
424                         /* no lock on binding file, YP is dead. */
425                         /* Try to bring it back to life. */
426                         _close(fd);
427                         goto skipit;
428                 }
429         }
430 skipit:
431 #endif
432         if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
433                 /*
434                  * We're trying to make a new binding: zorch the
435                  * existing handle now (if any).
436                  */
437                 if (ysd->dom_client != NULL) {
438                         clnt_destroy(ysd->dom_client);
439                         ysd->dom_client = NULL;
440                         ysd->dom_socket = -1;
441                 }
442                 bzero((char *)&clnt_sin, sizeof clnt_sin);
443                 clnt_sin.sin_family = AF_INET;
444                 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
445
446                 clnt_sock = RPC_ANYSOCK;
447                 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
448                         0, 0);
449                 if (client == NULL) {
450                         /*
451                          * These conditions indicate ypbind just isn't
452                          * alive -- we probably don't want to shoot our
453                          * mouth off in this case; instead generate error
454                          * messages only for really exotic problems.
455                          */
456                         if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
457                            (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
458                            rpc_createerr.cf_error.re_errno == ECONNREFUSED))
459                                 clnt_pcreateerror("clnttcp_create");
460                         if (new)
461                                 free(ysd);
462                         return (YPERR_YPBIND);
463                 }
464
465                 /*
466                  * Check the port number -- should be < IPPORT_RESERVED.
467                  * If not, it's possible someone has registered a bogus
468                  * ypbind with the portmapper and is trying to trick us.
469                  */
470                 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
471                         if (client != NULL)
472                                 clnt_destroy(client);
473                         if (new)
474                                 free(ysd);
475                         return(YPERR_YPBIND);
476                 }
477                 tv.tv_sec = _yplib_timeout/2;
478                 tv.tv_usec = 0;
479                 r = clnt_call(client, YPBINDPROC_DOMAIN,
480                     (xdrproc_t)xdr_domainname, &dom,
481                     (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
482                 if (r != RPC_SUCCESS) {
483                         clnt_destroy(client);
484                         ysd->dom_vers = -1;
485                         if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
486                                 if (new)
487                                         free(ysd);
488                                 return(YPERR_YPBIND);
489                         }
490                         fprintf(stderr,
491                         "YP: server for domain %s not responding, retrying\n", dom);
492                         goto again;
493                 } else {
494                         if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
495                                 struct timespec time_to_sleep, time_remaining;
496
497                                 clnt_destroy(client);
498                                 ysd->dom_vers = -1;
499
500                                 time_to_sleep.tv_sec = _yplib_timeout/2;
501                                 time_to_sleep.tv_nsec = 0;
502                                 _nanosleep(&time_to_sleep,
503                                     &time_remaining);
504                                 goto again;
505                         }
506                 }
507                 clnt_destroy(client);
508
509                 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
510                 ysd->dom_server_addr.sin_family = AF_INET;
511                 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
512                     &ysd->dom_server_addr.sin_port,
513                     sizeof(ysd->dom_server_addr.sin_port));
514                 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
515                     &ysd->dom_server_addr.sin_addr.s_addr,
516                     sizeof(ysd->dom_server_addr.sin_addr.s_addr));
517
518                 /*
519                  * We could do a reserved port check here too, but this
520                  * could pose compatibility problems. The local ypbind is
521                  * supposed to decide whether or not to trust yp servers
522                  * on insecure ports. For now, we trust its judgement.
523                  */
524                 ysd->dom_server_port =
525                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
526 gotit:
527                 ysd->dom_vers = YPVERS;
528                 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
529         }
530
531         /* Don't rebuild the connection to the server unless we have to. */
532         if (ysd->dom_client == NULL) {
533                 tv.tv_sec = _yplib_timeout/2;
534                 tv.tv_usec = 0;
535                 ysd->dom_socket = RPC_ANYSOCK;
536                 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
537                         YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
538                 if (ysd->dom_client == NULL) {
539                         clnt_pcreateerror("clntudp_create");
540                         ysd->dom_vers = -1;
541                         goto again;
542                 }
543                 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
544                         perror("fcntl: F_SETFD");
545                 /*
546                  * We want a port number associated with this socket
547                  * so that we can check its authenticity later.
548                  */
549                 checklen = sizeof(struct sockaddr_in);
550                 bzero((char *)&check, checklen);
551                 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
552                 check.sin_family = AF_INET;
553                 if (!_getsockname(ysd->dom_socket,
554                     (struct sockaddr *)&check, &checklen)) {
555                         ysd->dom_local_port = check.sin_port;
556                 } else {
557                         clnt_destroy(ysd->dom_client);
558                         if (new)
559                                 free(ysd);
560                         return(YPERR_YPBIND);
561                 }
562         }
563
564         if (new) {
565                 ysd->dom_pnext = _ypbindlist;
566                 _ypbindlist = ysd;
567         }
568
569         /*
570          * Set low retry timeout to realistically handle UDP packet
571          * loss for YP packet bursts.
572          */
573         tv.tv_sec = 1;
574         tv.tv_usec = 0;
575         clnt_control(ysd->dom_client, CLSET_RETRY_TIMEOUT, (char*)&tv);
576
577         if (ypdb != NULL)
578                 *ypdb = ysd;
579         return (0);
580 }
581
582 static void
583 _yp_unbind(struct dom_binding *ypb)
584 {
585         struct sockaddr_in check;
586         socklen_t checklen = sizeof(struct sockaddr_in);
587
588         if (ypb->dom_client != NULL) {
589                 /* Check the socket -- may have been hosed by the caller. */
590                 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check,
591                 &checklen) == -1 || check.sin_family != AF_INET ||
592                 check.sin_port != ypb->dom_local_port) {
593                         int save, sock;
594
595                         sock = ypb->dom_socket;
596                         save = _dup(ypb->dom_socket);
597                         clnt_destroy(ypb->dom_client);
598                         sock = _dup2(save, sock);
599                         _close(save);
600                 } else
601                         clnt_destroy(ypb->dom_client);
602         }
603
604         ypb->dom_client = NULL;
605         ypb->dom_socket = -1;
606         ypb->dom_vers = -1;
607 #ifdef YPMATCHCACHE
608         ypmatch_cache_flush(ypb);
609 #endif
610 }
611
612 static int
613 yp_bind_locked(char *dom)
614 {
615         return (_yp_dobind(dom, NULL));
616 }
617
618 int
619 yp_bind(char *dom)
620 {
621         int r;
622
623         YPLOCK();
624         r = yp_bind_locked(dom);
625         YPUNLOCK();
626         return (r);
627 }
628
629 static void
630 yp_unbind_locked(char *dom)
631 {
632         struct dom_binding *ypb, *ypbp;
633
634         ypbp = NULL;
635         for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
636                 if (strcmp(dom, ypb->dom_domain) == 0) {
637                         _yp_unbind(ypb);
638                         if (ypbp)
639                                 ypbp->dom_pnext = ypb->dom_pnext;
640                         else
641                                 _ypbindlist = ypb->dom_pnext;
642                         free(ypb);
643                         return;
644                 }
645                 ypbp = ypb;
646         }
647         return;
648 }
649
650 void
651 yp_unbind(char *dom)
652 {
653         YPLOCK();
654         yp_unbind_locked(dom);
655         YPUNLOCK();
656 }
657
658 int
659 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
660     char **outval, int *outvallen)
661 {
662         struct dom_binding *ysd;
663         struct ypresp_val yprv;
664         struct timeval tv;
665         struct ypreq_key yprk;
666         int r;
667
668         *outval = NULL;
669         *outvallen = 0;
670
671         /* Sanity check */
672
673         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
674             inmap == NULL || !strlen(inmap) ||
675             indomain == NULL || !strlen(indomain))
676                 return (YPERR_BADARGS);
677
678         YPLOCK();
679         if (_yp_dobind(indomain, &ysd) != 0) {
680                 YPUNLOCK();
681                 return(YPERR_DOMAIN);
682         }
683
684         yprk.domain = indomain;
685         yprk.map = inmap;
686         yprk.key.keydat_val = (char *)inkey;
687         yprk.key.keydat_len = inkeylen;
688
689 #ifdef YPMATCHCACHE
690         if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
691 /*
692         if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
693             inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
694 */
695                 *outvallen = yprv.val.valdat_len;
696                 *outval = (char *)malloc(*outvallen+1);
697                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
698                 (*outval)[*outvallen] = '\0';
699                 YPUNLOCK();
700                 return (0);
701         }
702 #endif
703
704 again:
705         if (_yp_dobind(indomain, &ysd) != 0) {
706                 YPUNLOCK();
707                 return (YPERR_DOMAIN);
708         }
709
710         tv.tv_sec = _yplib_timeout;
711         tv.tv_usec = 0;
712
713         bzero((char *)&yprv, sizeof yprv);
714
715         r = clnt_call(ysd->dom_client, YPPROC_MATCH,
716             (xdrproc_t)xdr_ypreq_key, &yprk,
717             (xdrproc_t)xdr_ypresp_val, &yprv, tv);
718         if (r != RPC_SUCCESS) {
719                 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
720                 _yp_unbind(ysd);
721                 goto again;
722         }
723
724         if (!(r = ypprot_err(yprv.stat))) {
725                 *outvallen = yprv.val.valdat_len;
726                 *outval = (char *)malloc(*outvallen+1);
727                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
728                 (*outval)[*outvallen] = '\0';
729 #ifdef YPMATCHCACHE
730                 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
731 #endif
732         }
733
734         xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
735         YPUNLOCK();
736         return (r);
737 }
738
739 static int
740 yp_get_default_domain_locked(char **domp)
741 {
742         *domp = NULL;
743         if (_yp_domain[0] == '\0')
744                 if (getdomainname(_yp_domain, sizeof _yp_domain))
745                         return (YPERR_NODOM);
746         *domp = _yp_domain;
747         return (0);
748 }
749
750 int
751 yp_get_default_domain(char **domp)
752 {
753         int r;
754
755         YPLOCK();
756         r = yp_get_default_domain_locked(domp);
757         YPUNLOCK();
758         return (r);
759 }
760
761 int
762 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen,
763     char **outval, int *outvallen)
764 {
765         struct ypresp_key_val yprkv;
766         struct ypreq_nokey yprnk;
767         struct dom_binding *ysd;
768         struct timeval tv;
769         int r;
770
771         /* Sanity check */
772
773         if (indomain == NULL || !strlen(indomain) ||
774             inmap == NULL || !strlen(inmap))
775                 return (YPERR_BADARGS);
776
777         *outkey = *outval = NULL;
778         *outkeylen = *outvallen = 0;
779
780         YPLOCK();
781 again:
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                 goto again;
801         }
802         if (!(r = ypprot_err(yprkv.stat))) {
803                 *outkeylen = yprkv.key.keydat_len;
804                 *outkey = (char *)malloc(*outkeylen+1);
805                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
806                 (*outkey)[*outkeylen] = '\0';
807                 *outvallen = yprkv.val.valdat_len;
808                 *outval = (char *)malloc(*outvallen+1);
809                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
810                 (*outval)[*outvallen] = '\0';
811         }
812
813         xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
814         YPUNLOCK();
815         return (r);
816 }
817
818 int
819 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen,
820     char **outkey, int *outkeylen, char **outval, int *outvallen)
821 {
822         struct ypresp_key_val yprkv;
823         struct ypreq_key yprk;
824         struct dom_binding *ysd;
825         struct timeval tv;
826         int r;
827
828         /* Sanity check */
829
830         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
831             inmap == NULL || !strlen(inmap) ||
832             indomain == NULL || !strlen(indomain))
833                 return (YPERR_BADARGS);
834
835         *outkey = *outval = NULL;
836         *outkeylen = *outvallen = 0;
837
838         YPLOCK();
839 again:
840         if (_yp_dobind(indomain, &ysd) != 0) {
841                 YPUNLOCK();
842                 return (YPERR_DOMAIN);
843         }
844
845         tv.tv_sec = _yplib_timeout;
846         tv.tv_usec = 0;
847
848         yprk.domain = indomain;
849         yprk.map = inmap;
850         yprk.key.keydat_val = inkey;
851         yprk.key.keydat_len = inkeylen;
852         bzero((char *)&yprkv, sizeof yprkv);
853
854         r = clnt_call(ysd->dom_client, YPPROC_NEXT,
855             (xdrproc_t)xdr_ypreq_key, &yprk,
856             (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
857         if (r != RPC_SUCCESS) {
858                 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
859                 _yp_unbind(ysd);
860                 goto again;
861         }
862         if (!(r = ypprot_err(yprkv.stat))) {
863                 *outkeylen = yprkv.key.keydat_len;
864                 *outkey = (char *)malloc(*outkeylen+1);
865                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
866                 (*outkey)[*outkeylen] = '\0';
867                 *outvallen = yprkv.val.valdat_len;
868                 *outval = (char *)malloc(*outvallen+1);
869                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
870                 (*outval)[*outvallen] = '\0';
871         }
872
873         xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
874         YPUNLOCK();
875         return (r);
876 }
877
878 int
879 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
880 {
881         struct ypreq_nokey yprnk;
882         struct dom_binding *ysd;
883         struct timeval tv;
884         struct sockaddr_in clnt_sin;
885         CLIENT *clnt;
886         u_long status, savstat;
887         int clnt_sock;
888
889         /* Sanity check */
890
891         if (indomain == NULL || !strlen(indomain) ||
892             inmap == NULL || !strlen(inmap))
893                 return (YPERR_BADARGS);
894
895         YPLOCK();
896 again:
897
898         if (_yp_dobind(indomain, &ysd) != 0) {
899                 YPUNLOCK();
900                 return (YPERR_DOMAIN);
901         }
902
903         tv.tv_sec = _yplib_timeout;
904         tv.tv_usec = 0;
905
906         /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
907
908         clnt_sock = RPC_ANYSOCK;
909         clnt_sin = ysd->dom_server_addr;
910         clnt_sin.sin_port = 0;
911         clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
912         if (clnt == NULL) {
913                 YPUNLOCK();
914                 printf("clnttcp_create failed\n");
915                 return (YPERR_PMAP);
916         }
917
918         yprnk.domain = indomain;
919         yprnk.map = inmap;
920         ypresp_allfn = incallback->foreach;
921         ypresp_data = (void *)incallback->data;
922
923         if (clnt_call(clnt, YPPROC_ALL,
924                 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
925                 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
926                         clnt_perror(ysd->dom_client, "yp_all: clnt_call");
927                         clnt_destroy(clnt);
928                         _yp_unbind(ysd);
929                         goto again;
930         }
931
932         clnt_destroy(clnt);
933         savstat = status;
934         xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status);       /* not really needed... */
935         YPUNLOCK();
936         if (savstat != YP_NOMORE)
937                 return (ypprot_err(savstat));
938         return (0);
939 }
940
941 int
942 yp_order(char *indomain, char *inmap, int *outorder)
943 {
944         struct dom_binding *ysd;
945         struct ypresp_order ypro;
946         struct ypreq_nokey yprnk;
947         struct timeval tv;
948         int r;
949
950         /* Sanity check */
951
952         if (indomain == NULL || !strlen(indomain) ||
953             inmap == NULL || !strlen(inmap))
954                 return (YPERR_BADARGS);
955
956         YPLOCK();
957 again:
958         if (_yp_dobind(indomain, &ysd) != 0) {
959                 YPUNLOCK();
960                 return (YPERR_DOMAIN);
961         }
962
963         tv.tv_sec = _yplib_timeout;
964         tv.tv_usec = 0;
965
966         yprnk.domain = indomain;
967         yprnk.map = inmap;
968
969         bzero((char *)(char *)&ypro, sizeof ypro);
970
971         r = clnt_call(ysd->dom_client, YPPROC_ORDER,
972             (xdrproc_t)xdr_ypreq_nokey, &yprnk,
973             (xdrproc_t)xdr_ypresp_order, &ypro, tv);
974
975         /*
976          * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
977          * procedure.
978          */
979         if (r == RPC_PROCUNAVAIL) {
980                 YPUNLOCK();
981                 return(YPERR_YPERR);
982         }
983
984         if (r != RPC_SUCCESS) {
985                 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
986                 _yp_unbind(ysd);
987                 goto again;
988         }
989
990         if (!(r = ypprot_err(ypro.stat))) {
991                 *outorder = ypro.ordernum;
992         }
993
994         xdr_free((xdrproc_t)xdr_ypresp_order, &ypro);
995         YPUNLOCK();
996         return (r);
997 }
998
999 int
1000 yp_master(char *indomain, char *inmap, char **outname)
1001 {
1002         struct dom_binding *ysd;
1003         struct ypresp_master yprm;
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         YPLOCK();
1014 again:
1015         if (_yp_dobind(indomain, &ysd) != 0) {
1016                 YPUNLOCK();
1017                 return (YPERR_DOMAIN);
1018         }
1019
1020         tv.tv_sec = _yplib_timeout;
1021         tv.tv_usec = 0;
1022
1023         yprnk.domain = indomain;
1024         yprnk.map = inmap;
1025
1026         bzero((char *)&yprm, sizeof yprm);
1027
1028         r = clnt_call(ysd->dom_client, YPPROC_MASTER,
1029             (xdrproc_t)xdr_ypreq_nokey, &yprnk,
1030             (xdrproc_t)xdr_ypresp_master, &yprm, tv);
1031         if (r != RPC_SUCCESS) {
1032                 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
1033                 _yp_unbind(ysd);
1034                 goto again;
1035         }
1036
1037         if (!(r = ypprot_err(yprm.stat))) {
1038                 *outname = (char *)strdup(yprm.peer);
1039         }
1040
1041         xdr_free((xdrproc_t)xdr_ypresp_master, &yprm);
1042         YPUNLOCK();
1043         return (r);
1044 }
1045
1046 int
1047 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
1048 {
1049         struct dom_binding *ysd;
1050         struct ypresp_maplist ypml;
1051         struct timeval tv;
1052         int r;
1053
1054         /* Sanity check */
1055
1056         if (indomain == NULL || !strlen(indomain))
1057                 return (YPERR_BADARGS);
1058
1059         YPLOCK();
1060 again:
1061         if (_yp_dobind(indomain, &ysd) != 0) {
1062                 YPUNLOCK();
1063                 return (YPERR_DOMAIN);
1064         }
1065
1066         tv.tv_sec = _yplib_timeout;
1067         tv.tv_usec = 0;
1068
1069         bzero((char *)&ypml, sizeof ypml);
1070
1071         r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
1072             (xdrproc_t)xdr_domainname, &indomain,
1073             (xdrproc_t)xdr_ypresp_maplist, &ypml, tv);
1074         if (r != RPC_SUCCESS) {
1075                 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
1076                 _yp_unbind(ysd);
1077                 goto again;
1078         }
1079         if (!(r = ypprot_err(ypml.stat))) {
1080                 *outmaplist = ypml.maps;
1081         }
1082
1083         /* NO: xdr_free((xdrproc_t)xdr_ypresp_maplist, &ypml);*/
1084         YPUNLOCK();
1085         return (r);
1086 }
1087
1088 char *
1089 yperr_string(int incode)
1090 {
1091         const char *errstr;
1092         static char err[80];
1093
1094         switch (incode) {
1095         case 0:
1096                 errstr = "Success";
1097                 break;
1098         case YPERR_BADARGS:
1099                 errstr = "Request arguments bad";
1100                 break;
1101         case YPERR_RPC:
1102                 errstr = "RPC failure";
1103                 break;
1104         case YPERR_DOMAIN:
1105                 errstr = "Can't bind to server which serves this domain";
1106                 break;
1107         case YPERR_MAP:
1108                 errstr = "No such map in server's domain";
1109                 break;
1110         case YPERR_KEY:
1111                 errstr = "No such key in map";
1112                 break;
1113         case YPERR_YPERR:
1114                 errstr = "YP server error";
1115                 break;
1116         case YPERR_RESRC:
1117                 errstr = "Local resource allocation failure";
1118                 break;
1119         case YPERR_NOMORE:
1120                 errstr = "No more records in map database";
1121                 break;
1122         case YPERR_PMAP:
1123                 errstr = "Can't communicate with portmapper";
1124                 break;
1125         case YPERR_YPBIND:
1126                 errstr = "Can't communicate with ypbind";
1127                 break;
1128         case YPERR_YPSERV:
1129                 errstr = "Can't communicate with ypserv";
1130                 break;
1131         case YPERR_NODOM:
1132                 errstr = "Local domain name not set";
1133                 break;
1134         case YPERR_BADDB:
1135                 errstr = "Server data base is bad";
1136                 break;
1137         case YPERR_VERS:
1138                 errstr = "YP server version mismatch - server can't supply service.";
1139                 break;
1140         case YPERR_ACCESS:
1141                 errstr = "Access violation";
1142                 break;
1143         case YPERR_BUSY:
1144                 errstr = "Database is busy";
1145                 break;
1146         default:
1147                 errstr = NULL;
1148                 break;
1149         }
1150         if (errstr != NULL)
1151                 strlcpy(err, errstr, sizeof(err));
1152         else
1153                 snprintf(err, sizeof(err), "YP unknown error %d\n", incode);
1154         return (err);
1155 }
1156
1157 int
1158 ypprot_err(unsigned int incode)
1159 {
1160         switch (incode) {
1161         case YP_TRUE:
1162                 return (0);
1163         case YP_FALSE:
1164                 return (YPERR_YPBIND);
1165         case YP_NOMORE:
1166                 return (YPERR_NOMORE);
1167         case YP_NOMAP:
1168                 return (YPERR_MAP);
1169         case YP_NODOM:
1170                 return (YPERR_DOMAIN);
1171         case YP_NOKEY:
1172                 return (YPERR_KEY);
1173         case YP_BADOP:
1174                 return (YPERR_YPERR);
1175         case YP_BADDB:
1176                 return (YPERR_BADDB);
1177         case YP_YPERR:
1178                 return (YPERR_YPERR);
1179         case YP_BADARGS:
1180                 return (YPERR_BADARGS);
1181         case YP_VERS:
1182                 return (YPERR_VERS);
1183         }
1184         return (YPERR_YPERR);
1185 }
1186
1187 int
1188 _yp_check(char **dom)
1189 {
1190         char *unused;
1191
1192         YPLOCK();
1193         if (_yp_domain[0]=='\0')
1194                 if (yp_get_default_domain_locked(&unused)) {
1195                         YPUNLOCK();
1196                         return (0);
1197                 }
1198
1199         if (dom)
1200                 *dom = _yp_domain;
1201
1202         if (yp_bind_locked(_yp_domain) == 0) {
1203                 yp_unbind_locked(_yp_domain);
1204                 YPUNLOCK();
1205                 return (1);
1206         }
1207         YPUNLOCK();
1208         return (0);
1209 }