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 address = inet_addr( host );
109 /* This was just a test for -1 until OSF1 let inet_addr return
110 unsigned int, which is narrower than 'unsigned long address' */
111 if ( address == 0xffffffff || address == (unsigned long) -1 ) {
112 if ( (hp = gethostbyname( host )) == NULL ) {
113 errno = EHOSTUNREACH;
117 for ( i = 0; hp->h_addr_list[ i ] != 0; ++i ) {
118 SAFEMEMCPY( (char *)&sock.sin_addr.s_addr,
119 (char *)hp->h_addr_list[ i ],
120 sizeof(sock.sin_addr.s_addr));
121 if ( add_addr( ld, (struct sockaddr *)&sock ) < 0 ) {
122 ldap_ld_free( ld, 1 );
128 sock.sin_addr.s_addr = address;
129 if ( add_addr( ld, (struct sockaddr *)&sock ) < 0 ) {
130 ldap_ld_free( ld, 1 );
135 if ( ld->ld_host == NULL ) {
136 ld->ld_host = strdup( host );
141 address = INADDR_LOOPBACK;
142 sock.sin_addr.s_addr = htonl( address );
143 if ( add_addr( ld, (struct sockaddr *)&sock ) < 0 ) {
144 ldap_ld_free( ld, 1 );
149 if ( ld->ld_sb.sb_addrs == NULL
150 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS
151 || ( ld->ld_defconn = ldap_new_connection( ld, NULL, 1,0,0 )) == NULL
152 #endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS */
154 ldap_ld_free( ld, 0 );
158 ld->ld_sb.sb_useaddr = ld->ld_sb.sb_addrs[ 0 ];
159 cldap_setretryinfo( ld, 0, 0 );
163 for ( i = 0; i < ld->ld_sb.sb_naddr; ++i ) {
164 Debug( LDAP_DEBUG_TRACE, "end of cldap_open address %d is %s\n",
165 i, inet_ntoa( ((struct sockaddr_in *)
166 ld->ld_sb.sb_addrs[ i ])->sin_addr ), 0 );
176 cldap_close( LDAP *ld )
178 ldap_ld_free( ld, 0 );
183 cldap_setretryinfo( LDAP *ld, int tries, int timeout )
185 ld->ld_cldaptries = ( tries <= 0 ) ? DEF_CLDAP_TRIES : tries;
186 ld->ld_cldaptimeout = ( timeout <= 0 ) ? DEF_CLDAP_TIMEOUT : timeout;
191 cldap_search_s( LDAP *ld, char *base, int scope, char *filter, char **attrs,
192 int attrsonly, LDAPMessage **res, char *logdn )
195 struct cldap_retinfo cri;
199 (void) memset( &cri, 0, sizeof( cri ));
201 if ( logdn != NULL ) {
202 ld->ld_cldapdn = logdn;
203 } else if ( ld->ld_cldapdn == NULL ) {
208 if ( cri.cri_try != 0 ) {
209 --ld->ld_msgid; /* use same id as before */
211 ld->ld_sb.sb_useaddr = ld->ld_sb.sb_addrs[ cri.cri_useaddr ];
213 Debug( LDAP_DEBUG_TRACE, "cldap_search_s try %d (to %s)\n",
214 cri.cri_try, inet_ntoa( ((struct sockaddr_in *)
215 ld->ld_sb.sb_useaddr)->sin_addr ), 0 );
217 if ( (msgid = ldap_search( ld, base, scope, filter, attrs,
218 attrsonly )) == -1 ) {
219 return( ld->ld_errno );
222 if ( ld->ld_cache != NULL && ld->ld_responses != NULL ) {
223 Debug( LDAP_DEBUG_TRACE, "cldap_search_s res from cache\n",
225 *res = ld->ld_responses;
226 ld->ld_responses = ld->ld_responses->lm_next;
227 return( ldap_result2error( ld, *res, 0 ));
229 #endif /* LDAP_NOCACHE */
230 ret = cldap_result( ld, msgid, res, &cri, base );
238 add_addr( LDAP *ld, struct sockaddr *sap )
240 struct sockaddr *newsap, **addrs;
242 if (( newsap = (struct sockaddr *)malloc( sizeof( struct sockaddr )))
244 ld->ld_errno = LDAP_NO_MEMORY;
248 if ( ld->ld_sb.sb_naddr == 0 ) {
249 addrs = (struct sockaddr **)malloc( sizeof(struct sockaddr *));
251 addrs = (struct sockaddr **)realloc( ld->ld_sb.sb_addrs,
252 ( ld->ld_sb.sb_naddr + 1 ) * sizeof(struct sockaddr *));
255 if ( addrs == NULL ) {
257 ld->ld_errno = LDAP_NO_MEMORY;
261 SAFEMEMCPY( (char *)newsap, (char *)sap, sizeof( struct sockaddr ));
262 addrs[ ld->ld_sb.sb_naddr++ ] = newsap;
263 ld->ld_sb.sb_addrs = (void **)addrs;
269 cldap_result( LDAP *ld, int msgid, LDAPMessage **res,
270 struct cldap_retinfo *crip, char *base )
272 Sockbuf *sb = &ld->ld_sb;
275 int ret, id, fromaddr, i;
280 if ( crip->cri_try == 0 ) {
281 crip->cri_maxtries = ld->ld_cldaptries * sb->sb_naddr;
282 crip->cri_timeout = ld->ld_cldaptimeout;
283 crip->cri_useaddr = 0;
284 Debug( LDAP_DEBUG_TRACE, "cldap_result tries %d timeout %d\n",
285 ld->ld_cldaptries, ld->ld_cldaptimeout, 0 );
288 if ((tv.tv_sec = crip->cri_timeout / sb->sb_naddr) < 1 ) {
293 Debug( LDAP_DEBUG_TRACE,
294 "cldap_result waiting up to %d seconds for a response\n",
296 ber_init_w_nullc( &ber, 0 );
297 ldap_set_ber_options( ld, &ber );
299 if ( cldap_getmsg( ld, &tv, &ber ) == -1 ) {
301 Debug( LDAP_DEBUG_TRACE, "cldap_getmsg returned -1 (%d)\n",
303 } else if ( ld->ld_errno == LDAP_TIMEOUT ) {
304 Debug( LDAP_DEBUG_TRACE,
305 "cldap_result timed out\n", 0, 0, 0 );
307 * It timed out; is it time to give up?
309 if ( ++crip->cri_try >= crip->cri_maxtries ) {
313 if ( ++crip->cri_useaddr >= sb->sb_naddr ) {
315 * new round: reset address to first one and
318 crip->cri_useaddr = 0;
319 crip->cri_timeout <<= 1;
326 * Got a response. It should look like:
327 * { msgid, logdn, { searchresponse...}}
331 if ( ber_scanf( &ber, "ia", &id, &logdn ) == LBER_ERROR ) {
332 free( ber.ber_buf ); /* gack! */
333 ret = LDAP_DECODING_ERROR;
334 Debug( LDAP_DEBUG_TRACE,
335 "cldap_result: ber_scanf returned LBER_ERROR (%d)\n",
337 } else if ( id != msgid ) {
338 free( ber.ber_buf ); /* gack! */
339 Debug( LDAP_DEBUG_TRACE,
340 "cldap_result: looking for msgid %d; got %d\n",
342 ret = -1; /* ignore and keep looking */
345 * got a result: determine which server it came from
346 * decode into ldap message chain
348 for ( fromaddr = 0; fromaddr < sb->sb_naddr; ++fromaddr ) {
349 if ( memcmp( &((struct sockaddr_in *)
350 sb->sb_addrs[ fromaddr ])->sin_addr,
351 &((struct sockaddr_in *)sb->sb_fromaddr)->sin_addr,
352 sizeof( struct in_addr )) == 0 ) {
356 ret = cldap_parsemsg( ld, msgid, &ber, res, base );
357 free( ber.ber_buf ); /* gack! */
358 Debug( LDAP_DEBUG_TRACE,
359 "cldap_result got result (%d)\n", ret, 0, 0 );
362 if ( logdn != NULL ) {
369 * If we are giving up (successfully or otherwise) then
370 * abandon any outstanding requests.
374 if ( i >= sb->sb_naddr ) {
375 i = sb->sb_naddr - 1;
378 for ( ; i >= 0; --i ) {
379 if ( i == fromaddr ) {
382 sb->sb_useaddr = sb->sb_addrs[ i ];
383 Debug( LDAP_DEBUG_TRACE, "cldap_result abandoning id %d (to %s)\n",
384 msgid, inet_ntoa( ((struct sockaddr_in *)
385 sb->sb_useaddr)->sin_addr ), 0 );
386 (void) ldap_abandon( ld, msgid );
390 return( ld->ld_errno = ret );
395 cldap_parsemsg( LDAP *ld, int msgid, BerElement *ber,
396 LDAPMessage **res, char *base )
398 unsigned long tag, len;
399 int baselen, slen, rc;
400 char *dn, *p, *cookie;
401 LDAPMessage *chain, *prev, *ldm;
404 rc = LDAP_DECODING_ERROR; /* pessimistic */
405 ldm = chain = prev = NULLMSG;
406 baselen = ( base == NULL ) ? 0 : strlen( base );
409 for ( tag = ber_first_element( ber, &len, &cookie );
410 tag != LBER_DEFAULT && rc != LDAP_SUCCESS;
411 tag = ber_next_element( ber, &len, cookie )) {
412 if (( ldm = (LDAPMessage *)calloc( 1, sizeof(LDAPMessage)))
413 == NULL || ( ldm->lm_ber = ldap_alloc_ber_with_options( ld ))
416 break; /* return w/error*/
418 ldm->lm_msgid = msgid;
419 ldm->lm_msgtype = tag;
421 if ( tag == LDAP_RES_SEARCH_RESULT ) {
422 Debug( LDAP_DEBUG_TRACE, "cldap_parsemsg got search result\n",
425 if ( ber_get_stringal( ber, &bv ) == LBER_DEFAULT ) {
426 break; /* return w/error */
429 if ( ber_printf( ldm->lm_ber, "to", tag, bv->bv_val,
430 bv->bv_len ) == -1 ) {
431 break; /* return w/error */
437 } else if ( tag == LDAP_RES_SEARCH_ENTRY ) {
438 if ( ber_scanf( ber, "{aO", &dn, &bv ) == LBER_ERROR ) {
439 break; /* return w/error */
441 Debug( LDAP_DEBUG_TRACE, "cldap_parsemsg entry %s\n", dn, 0, 0 );
442 if ( dn != NULL && *(dn + ( slen = strlen(dn)) - 1) == '*' &&
445 * substitute original searchbase for trailing '*'
447 if (( p = (char *)malloc( slen + baselen )) == NULL ) {
450 break; /* return w/error */
453 strcpy( p + slen - 1, base );
458 if ( ber_printf( ldm->lm_ber, "t{so}", tag, dn, bv->bv_val,
459 bv->bv_len ) == -1 ) {
460 break; /* return w/error */
467 Debug( LDAP_DEBUG_TRACE, "cldap_parsemsg got unknown tag %d\n",
469 rc = LDAP_PROTOCOL_ERROR;
470 break; /* return w/error */
473 /* Reset message ber so we can read from it later. Gack! */
474 ldm->lm_ber->ber_end = ldm->lm_ber->ber_ptr;
475 ldm->lm_ber->ber_ptr = ldm->lm_ber->ber_buf;
478 if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
479 fprintf( stderr, "cldap_parsemsg add message id %d type %d:\n",
480 ldm->lm_msgid, ldm->lm_msgtype );
481 ber_dump( ldm->lm_ber, 1 );
483 #endif /* LDAP_DEBUG */
486 if ( ld->ld_cache != NULL ) {
487 ldap_add_result_to_cache( ld, ldm );
489 #endif /* LDAP_NOCACHE */
491 if ( chain == NULL ) {
494 prev->lm_chain = ldm;
500 /* dispose of any leftovers */
502 if ( ldm->lm_ber != NULLBER ) {
503 ber_free( ldm->lm_ber, 1 );
511 /* return chain, calling result2error if we got anything at all */
513 return(( *res == NULLMSG ) ? rc : ldap_result2error( ld, *res, 0 ));
515 #endif /* LDAP_CONNECTIONLESS */