2 * Copyright (c) 1990, 1994 Regents of the University of Michigan.
5 * cldap.c - synchronous, retrying interface to the cldap protocol
10 #ifdef LDAP_CONNECTIONLESS
13 static char copyright[] = "@(#) Copyright (c) 1990, 1994 Regents of the University of Michigan.\nAll rights reserved.\n";
20 #include <ac/socket.h>
21 #include <ac/string.h>
26 #define DEF_CLDAP_TIMEOUT 3
27 #define DEF_CLDAP_TRIES 4
30 struct cldap_retinfo {
37 static int add_addr LDAP_P((
38 LDAP *ld, struct sockaddr *sap ));
39 static int cldap_result LDAP_P((
40 LDAP *ld, int msgid, LDAPMessage **res,
41 struct cldap_retinfo *crip, char *base ));
42 static int cldap_parsemsg LDAP_P((
43 LDAP *ld, int msgid, BerElement *ber,
44 LDAPMessage **res, char *base ));
47 * cldap_open - initialize and connect to an ldap server. A magic cookie to
48 * be used for future communication is returned on success, NULL on failure.
52 * ld = cldap_open( hostname, port );
56 cldap_open( char *host, int port )
59 unsigned long address;
60 struct sockaddr_in sock;
66 Debug( LDAP_DEBUG_TRACE, "ldap_open\n", 0, 0, 0 );
68 if ( (s = socket( AF_INET, SOCK_DGRAM, 0 )) < 0 ) {
72 sock.sin_addr.s_addr = 0;
73 sock.sin_family = AF_INET;
75 if ( bind(s, (struct sockaddr *) &sock, sizeof(sock)) < 0) {
80 if (( ld = ldap_init( host, port )) == NULL ) {
84 if ( (ld->ld_sb.sb_fromaddr = (void *) calloc( 1,
85 sizeof( struct sockaddr ))) == NULL ) {
91 ld->ld_sb.sb_naddr = 0;
92 ld->ld_version = LDAP_VERSION;
94 sock.sin_family = AF_INET;
95 sock.sin_port = htons( port );
98 * 'host' may be a space-separated list.
100 if ( host != NULL ) {
101 for ( ; host != NULL; host = p ) {
102 if (( p = strchr( host, ' ' )) != NULL ) {
103 for (*p++ = '\0'; *p == ' '; p++) {
108 if ( (address = inet_addr( host )) == (unsigned long) -1L ) {
109 if ( (hp = gethostbyname( host )) == NULL ) {
110 errno = EHOSTUNREACH;
114 for ( i = 0; hp->h_addr_list[ i ] != 0; ++i ) {
115 SAFEMEMCPY( (char *)&sock.sin_addr.s_addr,
116 (char *)hp->h_addr_list[ i ],
117 sizeof(sock.sin_addr.s_addr));
118 if ( add_addr( ld, (struct sockaddr *)&sock ) < 0 ) {
119 ldap_ld_free( ld, 1 );
125 sock.sin_addr.s_addr = address;
126 if ( add_addr( ld, (struct sockaddr *)&sock ) < 0 ) {
127 ldap_ld_free( ld, 1 );
132 if ( ld->ld_host == NULL ) {
133 ld->ld_host = strdup( host );
138 address = INADDR_LOOPBACK;
139 sock.sin_addr.s_addr = htonl( address );
140 if ( add_addr( ld, (struct sockaddr *)&sock ) < 0 ) {
141 ldap_ld_free( ld, 1 );
146 if ( ld->ld_sb.sb_addrs == NULL
147 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS
148 || ( ld->ld_defconn = ldap_new_connection( ld, NULL, 1,0,0 )) == NULL
149 #endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS */
151 ldap_ld_free( ld, 0 );
155 ld->ld_sb.sb_useaddr = ld->ld_sb.sb_addrs[ 0 ];
156 cldap_setretryinfo( ld, 0, 0 );
160 for ( i = 0; i < ld->ld_sb.sb_naddr; ++i ) {
161 Debug( LDAP_DEBUG_TRACE, "end of cldap_open address %d is %s\n",
162 i, inet_ntoa( ((struct sockaddr_in *)
163 ld->ld_sb.sb_addrs[ i ])->sin_addr ), 0 );
173 cldap_close( LDAP *ld )
175 ldap_ld_free( ld, 0 );
180 cldap_setretryinfo( LDAP *ld, int tries, int timeout )
182 ld->ld_cldaptries = ( tries <= 0 ) ? DEF_CLDAP_TRIES : tries;
183 ld->ld_cldaptimeout = ( timeout <= 0 ) ? DEF_CLDAP_TIMEOUT : timeout;
188 cldap_search_s( LDAP *ld, char *base, int scope, char *filter, char **attrs,
189 int attrsonly, LDAPMessage **res, char *logdn )
192 struct cldap_retinfo cri;
196 (void) memset( &cri, 0, sizeof( cri ));
198 if ( logdn != NULL ) {
199 ld->ld_cldapdn = logdn;
200 } else if ( ld->ld_cldapdn == NULL ) {
205 if ( cri.cri_try != 0 ) {
206 --ld->ld_msgid; /* use same id as before */
208 ld->ld_sb.sb_useaddr = ld->ld_sb.sb_addrs[ cri.cri_useaddr ];
210 Debug( LDAP_DEBUG_TRACE, "cldap_search_s try %d (to %s)\n",
211 cri.cri_try, inet_ntoa( ((struct sockaddr_in *)
212 ld->ld_sb.sb_useaddr)->sin_addr ), 0 );
214 if ( (msgid = ldap_search( ld, base, scope, filter, attrs,
215 attrsonly )) == -1 ) {
216 return( ld->ld_errno );
219 if ( ld->ld_cache != NULL && ld->ld_responses != NULL ) {
220 Debug( LDAP_DEBUG_TRACE, "cldap_search_s res from cache\n",
222 *res = ld->ld_responses;
223 ld->ld_responses = ld->ld_responses->lm_next;
224 return( ldap_result2error( ld, *res, 0 ));
226 #endif /* LDAP_NOCACHE */
227 ret = cldap_result( ld, msgid, res, &cri, base );
235 add_addr( LDAP *ld, struct sockaddr *sap )
237 struct sockaddr *newsap, **addrs;
239 if (( newsap = (struct sockaddr *)malloc( sizeof( struct sockaddr )))
241 ld->ld_errno = LDAP_NO_MEMORY;
245 if ( ld->ld_sb.sb_naddr == 0 ) {
246 addrs = (struct sockaddr **)malloc( sizeof(struct sockaddr *));
248 addrs = (struct sockaddr **)realloc( ld->ld_sb.sb_addrs,
249 ( ld->ld_sb.sb_naddr + 1 ) * sizeof(struct sockaddr *));
252 if ( addrs == NULL ) {
254 ld->ld_errno = LDAP_NO_MEMORY;
258 SAFEMEMCPY( (char *)newsap, (char *)sap, sizeof( struct sockaddr ));
259 addrs[ ld->ld_sb.sb_naddr++ ] = newsap;
260 ld->ld_sb.sb_addrs = (void **)addrs;
266 cldap_result( LDAP *ld, int msgid, LDAPMessage **res,
267 struct cldap_retinfo *crip, char *base )
269 Sockbuf *sb = &ld->ld_sb;
272 int ret, id, fromaddr, i;
277 if ( crip->cri_try == 0 ) {
278 crip->cri_maxtries = ld->ld_cldaptries * sb->sb_naddr;
279 crip->cri_timeout = ld->ld_cldaptimeout;
280 crip->cri_useaddr = 0;
281 Debug( LDAP_DEBUG_TRACE, "cldap_result tries %d timeout %d\n",
282 ld->ld_cldaptries, ld->ld_cldaptimeout, 0 );
285 if ((tv.tv_sec = crip->cri_timeout / sb->sb_naddr) < 1 ) {
290 Debug( LDAP_DEBUG_TRACE,
291 "cldap_result waiting up to %d seconds for a response\n",
293 ber_init_w_nullc( &ber, 0 );
294 ldap_set_ber_options( ld, &ber );
296 if ( cldap_getmsg( ld, &tv, &ber ) == -1 ) {
298 Debug( LDAP_DEBUG_TRACE, "cldap_getmsg returned -1 (%d)\n",
300 } else if ( ld->ld_errno == LDAP_TIMEOUT ) {
301 Debug( LDAP_DEBUG_TRACE,
302 "cldap_result timed out\n", 0, 0, 0 );
304 * It timed out; is it time to give up?
306 if ( ++crip->cri_try >= crip->cri_maxtries ) {
310 if ( ++crip->cri_useaddr >= sb->sb_naddr ) {
312 * new round: reset address to first one and
315 crip->cri_useaddr = 0;
316 crip->cri_timeout <<= 1;
323 * Got a response. It should look like:
324 * { msgid, logdn, { searchresponse...}}
328 if ( ber_scanf( &ber, "ia", &id, &logdn ) == LBER_ERROR ) {
329 free( ber.ber_buf ); /* gack! */
330 ret = LDAP_DECODING_ERROR;
331 Debug( LDAP_DEBUG_TRACE,
332 "cldap_result: ber_scanf returned LBER_ERROR (%d)\n",
334 } else if ( id != msgid ) {
335 free( ber.ber_buf ); /* gack! */
336 Debug( LDAP_DEBUG_TRACE,
337 "cldap_result: looking for msgid %d; got %d\n",
339 ret = -1; /* ignore and keep looking */
342 * got a result: determine which server it came from
343 * decode into ldap message chain
345 for ( fromaddr = 0; fromaddr < sb->sb_naddr; ++fromaddr ) {
346 if ( memcmp( &((struct sockaddr_in *)
347 sb->sb_addrs[ fromaddr ])->sin_addr,
348 &((struct sockaddr_in *)sb->sb_fromaddr)->sin_addr,
349 sizeof( struct in_addr )) == 0 ) {
353 ret = cldap_parsemsg( ld, msgid, &ber, res, base );
354 free( ber.ber_buf ); /* gack! */
355 Debug( LDAP_DEBUG_TRACE,
356 "cldap_result got result (%d)\n", ret, 0, 0 );
359 if ( logdn != NULL ) {
366 * If we are giving up (successfully or otherwise) then
367 * abandon any outstanding requests.
371 if ( i >= sb->sb_naddr ) {
372 i = sb->sb_naddr - 1;
375 for ( ; i >= 0; --i ) {
376 if ( i == fromaddr ) {
379 sb->sb_useaddr = sb->sb_addrs[ i ];
380 Debug( LDAP_DEBUG_TRACE, "cldap_result abandoning id %d (to %s)\n",
381 msgid, inet_ntoa( ((struct sockaddr_in *)
382 sb->sb_useaddr)->sin_addr ), 0 );
383 (void) ldap_abandon( ld, msgid );
387 return( ld->ld_errno = ret );
392 cldap_parsemsg( LDAP *ld, int msgid, BerElement *ber,
393 LDAPMessage **res, char *base )
395 unsigned long tag, len;
396 int baselen, slen, rc;
397 char *dn, *p, *cookie;
398 LDAPMessage *chain, *prev, *ldm;
401 rc = LDAP_DECODING_ERROR; /* pessimistic */
402 ldm = chain = prev = NULLMSG;
403 baselen = ( base == NULL ) ? 0 : strlen( base );
406 for ( tag = ber_first_element( ber, &len, &cookie );
407 tag != LBER_DEFAULT && rc != LDAP_SUCCESS;
408 tag = ber_next_element( ber, &len, cookie )) {
409 if (( ldm = (LDAPMessage *)calloc( 1, sizeof(LDAPMessage)))
410 == NULL || ( ldm->lm_ber = ldap_alloc_ber_with_options( ld ))
413 break; /* return w/error*/
415 ldm->lm_msgid = msgid;
416 ldm->lm_msgtype = tag;
418 if ( tag == LDAP_RES_SEARCH_RESULT ) {
419 Debug( LDAP_DEBUG_TRACE, "cldap_parsemsg got search result\n",
422 if ( ber_get_stringal( ber, &bv ) == LBER_DEFAULT ) {
423 break; /* return w/error */
426 if ( ber_printf( ldm->lm_ber, "to", tag, bv->bv_val,
427 bv->bv_len ) == -1 ) {
428 break; /* return w/error */
434 } else if ( tag == LDAP_RES_SEARCH_ENTRY ) {
435 if ( ber_scanf( ber, "{aO", &dn, &bv ) == LBER_ERROR ) {
436 break; /* return w/error */
438 Debug( LDAP_DEBUG_TRACE, "cldap_parsemsg entry %s\n", dn, 0, 0 );
439 if ( dn != NULL && *(dn + ( slen = strlen(dn)) - 1) == '*' &&
442 * substitute original searchbase for trailing '*'
444 if (( p = (char *)malloc( slen + baselen )) == NULL ) {
447 break; /* return w/error */
450 strcpy( p + slen - 1, base );
455 if ( ber_printf( ldm->lm_ber, "t{so}", tag, dn, bv->bv_val,
456 bv->bv_len ) == -1 ) {
457 break; /* return w/error */
464 Debug( LDAP_DEBUG_TRACE, "cldap_parsemsg got unknown tag %d\n",
466 rc = LDAP_PROTOCOL_ERROR;
467 break; /* return w/error */
470 /* Reset message ber so we can read from it later. Gack! */
471 ldm->lm_ber->ber_end = ldm->lm_ber->ber_ptr;
472 ldm->lm_ber->ber_ptr = ldm->lm_ber->ber_buf;
475 if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
476 fprintf( stderr, "cldap_parsemsg add message id %d type %d:\n",
477 ldm->lm_msgid, ldm->lm_msgtype );
478 ber_dump( ldm->lm_ber, 1 );
480 #endif /* LDAP_DEBUG */
483 if ( ld->ld_cache != NULL ) {
484 ldap_add_result_to_cache( ld, ldm );
486 #endif /* LDAP_NOCACHE */
488 if ( chain == NULL ) {
491 prev->lm_chain = ldm;
497 /* dispose of any leftovers */
499 if ( ldm->lm_ber != NULLBER ) {
500 ber_free( ldm->lm_ber, 1 );
508 /* return chain, calling result2error if we got anything at all */
510 return(( *res == NULLMSG ) ? rc : ldap_result2error( ld, *res, 0 ));
512 #endif /* LDAP_CONNECTIONLESS */