/* * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved. * COPYING RESTRICTIONS APPLY, see COPYRIGHT file * * Copyright 2001, Pierangelo Masarati, All rights reserved. * * This work has been developed to fulfill the requirements * of SysNet s.n.c. and it has been donated * to the OpenLDAP Foundation in the hope that it may be useful * to the Open Source community, but WITHOUT ANY WARRANTY. * * Permission is granted to anyone to use this software for any purpose * on any computer system, and to alter it and redistribute it, subject * to the following restrictions: * * 1. The author and SysNet s.n.c. are not responsible for the consequences * of use of this software, no matter how awful, even if they arise from * flaws in it. * * 2. The origin of this software must not be misrepresented, either by * explicit claim or by omission. Since few users ever read sources, * credits should appear in the documentation. * * 3. Altered versions must be plainly marked as such, and must not be * misrepresented as being the original software. Since few users * ever read sources, credits should appear in the documentation. * SysNet s.n.c. cannot be responsible for the consequences of the * alterations. * * 4. This notice may not be removed or altered. * * * This software is based on the backend back-ldap, implemented * by Howard Chu , and modified by Mark Valence * , Pierangelo Masarati and other * contributors. The contribution of the original software to the present * implementation is acknowledged in this copyright statement. * * A special acknowledgement goes to Howard for the overall architecture * (and for borrowing large pieces of code), and to Mark, who implemented * from scratch the attribute/objectclass mapping. * * The original copyright statement follows. * * Copyright 1999, Howard Chu, All rights reserved. * * Permission is granted to anyone to use this software for any purpose * on any computer system, and to alter it and redistribute it, subject * to the following restrictions: * * 1. The author is not responsible for the consequences of use of this * software, no matter how awful, even if they arise from flaws in it. * * 2. The origin of this software must not be misrepresented, either by * explicit claim or by omission. Since few users ever read sources, * credits should appear in the documentation. * * 3. Altered versions must be plainly marked as such, and must not be * misrepresented as being the original software. Since few users * ever read sources, credits should appear in the * documentation. * * 4. This notice may not be removed or altered. * */ #include "portable.h" #include #include #include #include #include "slap.h" #include "../back-ldap/back-ldap.h" #include "back-meta.h" #include "ldap_pvt.h" #undef ldap_debug /* silence a warning in ldap-int.h */ #include "ldap_log.h" #include "../../../libraries/libldap/ldap-int.h" static int meta_send_entry( Backend *be, Operation *op, struct metaconn *lc, int i, LDAPMessage *e, AttributeName *attrs, int attrsonly ); static int is_one_level_rdn( const char *rdn, int from ); int meta_back_search( Backend *be, Connection *conn, Operation *op, struct berval *base, struct berval *nbase, int scope, int deref, int slimit, int tlimit, Filter *filter, struct berval *filterstr, AttributeName *attrs, int attrsonly ) { struct metainfo *li = ( struct metainfo * )be->be_private; struct metaconn *lc; struct metasingleconn *lsc; struct timeval tv = { 0, 0 }; LDAPMessage *res, *e; int count, rc = 0, *msgid, sres = LDAP_NO_SUCH_OBJECT; char *match = NULL, *err = NULL; char *mbase = NULL, *mmatch = NULL; struct berval mfilter; BerVarray v2refs = NULL; int i, last = 0, candidates = 0; struct slap_limits_set *limit = NULL; int isroot = 0; /* * controls are set in ldap_back_dobind() * * FIXME: in case of values return filter, we might want * to map attrs and maybe rewrite value */ lc = meta_back_getconn( li, conn, op, META_OP_ALLOW_MULTIPLE, nbase, NULL ); if ( !lc || !meta_back_dobind( lc, op ) ) { send_ldap_result( conn, op, LDAP_OTHER, NULL, NULL, NULL, NULL ); return -1; } /* * Array of message id of each target */ msgid = ch_calloc( sizeof( int ), li->ntargets ); if ( msgid == NULL ) { send_ldap_result( conn, op, LDAP_OTHER, NULL, NULL, NULL, NULL ); return -1; } /* if not root, get appropriate limits */ if ( be_isroot( be, &op->o_ndn ) ) { isroot = 1; } else { ( void ) get_limits( be, &op->o_ndn, &limit ); } /* if no time limit requested, rely on remote server limits */ /* if requested limit higher than hard limit, abort */ if ( !isroot && tlimit > limit->lms_t_hard ) { /* no hard limit means use soft instead */ if ( limit->lms_t_hard == 0 && limit->lms_t_soft > -1 && tlimit > limit->lms_t_soft ) { tlimit = limit->lms_t_soft; /* positive hard limit means abort */ } else if ( limit->lms_t_hard > 0 ) { send_ldap_result( conn, op, LDAP_ADMINLIMIT_EXCEEDED, NULL, NULL, NULL, NULL ); rc = 0; goto finish; } /* negative hard limit means no limit */ } /* if no size limit requested, rely on remote server limits */ /* if requested limit higher than hard limit, abort */ if ( !isroot && slimit > limit->lms_s_hard ) { /* no hard limit means use soft instead */ if ( limit->lms_s_hard == 0 && limit->lms_s_soft > -1 && slimit > limit->lms_s_soft ) { slimit = limit->lms_s_soft; /* positive hard limit means abort */ } else if ( limit->lms_s_hard > 0 ) { send_ldap_result( conn, op, LDAP_ADMINLIMIT_EXCEEDED, NULL, NULL, NULL, NULL ); rc = 0; goto finish; } /* negative hard limit means no limit */ } /* * Inits searches */ for ( i = 0, lsc = lc->conns; !META_LAST(lsc); ++i, ++lsc ) { char *realbase = ( char * )base->bv_val; int realscope = scope; ber_len_t suffixlen; char *mapped_filter, **mapped_attrs; if ( lsc->candidate != META_CANDIDATE ) { msgid[ i ] = -1; continue; } /* should we check return values? */ if ( deref != -1 ) { ldap_set_option( lsc->ld, LDAP_OPT_DEREF, ( void * )&deref); } if ( tlimit != -1 ) { ldap_set_option( lsc->ld, LDAP_OPT_TIMELIMIT, ( void * )&tlimit); } if ( slimit != -1 ) { ldap_set_option( lsc->ld, LDAP_OPT_SIZELIMIT, ( void * )&slimit); } /* * modifies the base according to the scope, if required */ suffixlen = li->targets[ i ]->suffix.bv_len; if ( suffixlen > nbase->bv_len ) { switch ( scope ) { case LDAP_SCOPE_SUBTREE: /* * make the target suffix the new base * FIXME: this is very forgiving, because * illegal bases may be turned into * the suffix of the target. */ if ( dnIsSuffix( &li->targets[ i ]->suffix, nbase ) ) { realbase = li->targets[ i ]->suffix.bv_val; } else { /* * this target is no longer candidate */ msgid[ i ] = -1; goto new_candidate; } break; case LDAP_SCOPE_ONELEVEL: if ( is_one_level_rdn( li->targets[ i ]->suffix.bv_val, suffixlen - nbase->bv_len - 1 ) && dnIsSuffix( &li->targets[ i ]->suffix, nbase ) ) { /* * if there is exactly one level, * make the target suffix the new * base, and make scope "base" */ realbase = li->targets[ i ]->suffix.bv_val; realscope = LDAP_SCOPE_BASE; break; } /* else continue with the next case */ case LDAP_SCOPE_BASE: /* * this target is no longer candidate */ msgid[ i ] = -1; goto new_candidate; } } /* * Rewrite the search base, if required */ switch ( rewrite_session( li->targets[ i ]->rwinfo, "searchBase", realbase, conn, &mbase ) ) { case REWRITE_REGEXEC_OK: if ( mbase == NULL ) { mbase = realbase; } #ifdef NEW_LOGGING LDAP_LOG( BACK_META, DETAIL1, "[rw] searchBase [%d]: \"%s\" -> \"%s\"\n", i, base->bv_val, mbase ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> searchBase [%d]: \"%s\" -> \"%s\"\n", i, base->bv_val, mbase ); #endif /* !NEW_LOGGING */ break; case REWRITE_REGEXEC_UNWILLING: send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL, "Operation not allowed", NULL, NULL ); rc = -1; goto finish; case REWRITE_REGEXEC_ERR: send_ldap_result( conn, op, LDAP_OTHER, NULL, "rewrite error", NULL, NULL ); rc = -1; goto finish; } /* * Rewrite the search filter, if required */ switch ( rewrite_session( li->targets[ i ]->rwinfo, "searchFilter", filterstr->bv_val, conn, &mfilter.bv_val ) ) { case REWRITE_REGEXEC_OK: if ( mfilter.bv_val != NULL && mfilter.bv_val[ 0 ] != '\0') { mfilter.bv_len = strlen( mfilter.bv_val ); } else { if ( mfilter.bv_val != NULL ) { free( mfilter.bv_val ); } mfilter = *filterstr; } #ifdef NEW_LOGGING LDAP_LOG( BACK_META, DETAIL1, "[rw] searchFilter [%d]: \"%s\" -> \"%s\"\n", i, filterstr->bv_val, mfilter.bv_val ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> searchFilter [%d]: \"%s\" -> \"%s\"\n", i, filterstr->bv_val, mfilter.bv_val ); #endif /* !NEW_LOGGING */ break; case REWRITE_REGEXEC_UNWILLING: send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL, "Operation not allowed", NULL, NULL ); rc = -1; goto finish; case REWRITE_REGEXEC_ERR: send_ldap_result( conn, op, LDAP_OTHER, NULL, "Rewrite error", NULL, NULL ); rc = -1; goto finish; } /* * Maps attributes in filter */ mapped_filter = ldap_back_map_filter( &li->targets[ i ]->at_map, &li->targets[ i ]->oc_map, &mfilter, BACKLDAP_MAP ); if ( mapped_filter == NULL ) { mapped_filter = ( char * )mfilter.bv_val; } else { if ( mfilter.bv_val != filterstr->bv_val ) { free( mfilter.bv_val ); } } mfilter.bv_val = NULL; mfilter.bv_len = 0; /* * Maps required attributes */ mapped_attrs = ldap_back_map_attrs( &li->targets[ i ]->at_map, attrs, BACKLDAP_MAP ); if ( mapped_attrs == NULL && attrs) { for ( count=0; attrs[ count ].an_name.bv_val; count++ ); mapped_attrs = ch_malloc( ( count + 1 ) * sizeof(char *)); for ( count=0; attrs[ count ].an_name.bv_val; count++ ) { mapped_attrs[ count ] = attrs[ count ].an_name.bv_val; } mapped_attrs[ count ] = NULL; } /* * Starts the search */ msgid[ i ] = ldap_search( lsc->ld, mbase, realscope, mapped_filter, mapped_attrs, attrsonly ); if ( mapped_attrs ) { free( mapped_attrs ); mapped_attrs = NULL; } if ( mapped_filter != filterstr->bv_val ) { free( mapped_filter ); mapped_filter = NULL; } if ( mbase != realbase ) { free( mbase ); mbase = NULL; } if ( msgid[ i ] == -1 ) { continue; } ++candidates; new_candidate:; } /* We pull apart the ber result, stuff it into a slapd entry, and * let send_search_entry stuff it back into ber format. Slow & ugly, * but this is necessary for version matching, and for ACL processing. */ /* * In case there are no candidates, no cycle takes place... * * FIXME: we might use a queue, to balance the load * among the candidates */ for ( count = 0, rc = 0; candidates > 0; ) { int ab, gotit = 0; /* check for abandon */ ab = op->o_abandon; for ( i = 0, lsc = lc->conns; !META_LAST(lsc); lsc++, i++ ) { if ( msgid[ i ] == -1 ) { continue; } if ( ab ) { ldap_abandon( lsc->ld, msgid[ i ] ); rc = 0; break; } if ( slimit > 0 && count == slimit ) { send_search_result( conn, op, LDAP_SIZELIMIT_EXCEEDED, NULL, NULL, v2refs, NULL, count ); goto finish; } /* * FIXME: handle time limit as well? * Note that target servers are likely * to handle it, so at some time we'll * get a LDAP_TIMELIMIT_EXCEEDED from * one of them ... */ rc = ldap_result( lsc->ld, msgid[ i ], 0, &tv, &res ); if ( rc == 0 ) { continue; } else if ( rc == -1 ) { /* something REALLY bad happened! */ ( void )meta_clear_unused_candidates( li, lc, -1, 0 ); send_search_result( conn, op, LDAP_OTHER, NULL, NULL, v2refs, NULL, count ); /* anything else needs be done? */ goto finish; } else if ( rc == LDAP_RES_SEARCH_ENTRY ) { e = ldap_first_entry( lsc->ld, res ); if ( meta_send_entry( be, op, lc, i, e, attrs, attrsonly ) == LDAP_SUCCESS ) { count++; } /* * If scope is BASE, we need to jump out * as soon as one entry is found; if * the target pool is properly crafted, * this should correspond to the sole * entry that has the base DN */ if ( scope == LDAP_SCOPE_BASE && count > 0 ) { candidates = 0; sres = LDAP_SUCCESS; break; } ldap_msgfree( res ); gotit = 1; } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) { char **references = NULL; LDAPControl **ctrls = NULL; BerVarray refs; int cnt; /* * FIXME: should we collect references * and send them alltogether at the end? */ rc = ldap_parse_reference( lsc->ld, res, &references, &ctrls, 1 ); if ( rc != LDAP_SUCCESS ) { continue; } if ( references == NULL ) { continue; } for ( cnt = 0; references[ cnt ]; cnt++ ) /* NO OP */ ; refs = ch_calloc( cnt + 1, sizeof( struct berval ) ); for ( cnt = 0; references[ cnt ]; cnt++ ) { refs[ cnt ].bv_val = references[ cnt ]; refs[ cnt ].bv_len = strlen( references[ cnt ] ); } /* ignore return value by now */ ( void )send_search_reference( be, conn, op, NULL, refs, ctrls, &v2refs ); /* cleanup */ if ( references ) { ldap_value_free( references ); ch_free( refs ); } if ( ctrls ) { ldap_controls_free( ctrls ); } } else { sres = ldap_result2error( lsc->ld, res, 1 ); sres = ldap_back_map_result( sres ); if ( err != NULL ) { free( err ); } ldap_get_option( lsc->ld, LDAP_OPT_ERROR_STRING, &err ); if ( match != NULL ) { free( match ); } ldap_get_option( lsc->ld, LDAP_OPT_MATCHED_DN, &match ); #ifdef NEW_LOGGING LDAP_LOG( BACK_META, ERR, "meta_back_search [%d] " "match=\"%s\" err=\"%s\"\n", i, match, err ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ANY, "=>meta_back_search [%d] " "match=\"%s\" err=\"%s\"\n", i, match, err ); #endif /* !NEW_LOGGING */ last = i; rc = 0; /* * When no candidates are left, * the outer cycle finishes */ msgid[ i ] = -1; --candidates; } } if ( ab ) { goto finish; } if ( gotit == 0 ) { tv.tv_sec = 0; tv.tv_usec = 100000; ldap_pvt_thread_yield(); } else { tv.tv_sec = 0; tv.tv_usec = 0; } } if ( rc == -1 ) { /* * FIXME: need a strategy to handle errors */ rc = meta_back_op_result( lc, op ); goto finish; } /* * Rewrite the matched portion of the search base, if required * * FIXME: only the last one gets caught! */ if ( match != NULL ) { switch ( rewrite_session( li->targets[ last ]->rwinfo, "matchedDn", match, conn, &mmatch ) ) { case REWRITE_REGEXEC_OK: if ( mmatch == NULL ) { mmatch = ( char * )match; } #ifdef NEW_LOGGING LDAP_LOG( BACK_META, DETAIL1, "[rw] matchedDn: \"%s\" -> \"%s\"\n", match, mmatch, 0 ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> matchedDn: \"%s\" -> \"%s\"\n", match, mmatch, 0 ); #endif /* !NEW_LOGGING */ break; case REWRITE_REGEXEC_UNWILLING: case REWRITE_REGEXEC_ERR: /* FIXME: no error, but no matched ... */ mmatch = NULL; break; } } /* * In case we returned at least one entry, we return LDAP_SUCCESS * otherwise, the latter error code we got * * FIXME: we should handle error codes and return the more * important/reasonable */ if ( sres == LDAP_SUCCESS && v2refs ) { sres = LDAP_REFERRAL; } send_search_result( conn, op, sres, mmatch, err, v2refs, NULL, count ); finish:; if ( match ) { if ( mmatch != match ) { free( mmatch ); } free(match); } if ( err ) { free( err ); } if ( msgid ) { ch_free( msgid ); } return rc; } static int meta_send_entry( Backend *be, Operation *op, struct metaconn *lc, int target, LDAPMessage *e, AttributeName *attrs, int attrsonly ) { struct metainfo *li = ( struct metainfo * )be->be_private; struct berval a, mapped; Entry ent; BerElement ber = *e->lm_ber; Attribute *attr, **attrp; struct berval dummy = { 0, NULL }; struct berval *bv, bdn; const char *text; if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) { return LDAP_DECODING_ERROR; } /* * Rewrite the dn of the result, if needed */ switch ( rewrite_session( li->targets[ target ]->rwinfo, "searchResult", bdn.bv_val, lc->conn, &ent.e_name.bv_val ) ) { case REWRITE_REGEXEC_OK: if ( ent.e_name.bv_val == NULL ) { ent.e_name = bdn; } else { #ifdef NEW_LOGGING LDAP_LOG( BACK_META, DETAIL1, "[rw] searchResult[%d]: \"%s\" -> \"%s\"\n", target, bdn.bv_val, ent.e_name.bv_val ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> searchResult[%d]: \"%s\"" " -> \"%s\"\n", target, bdn.bv_val, ent.e_name.bv_val ); #endif /* !NEW_LOGGING */ ent.e_name.bv_len = strlen( ent.e_name.bv_val ); } break; case REWRITE_REGEXEC_UNWILLING: return LDAP_UNWILLING_TO_PERFORM; case REWRITE_REGEXEC_ERR: return LDAP_OTHER; } /* * Note: this may fail if the target host(s) schema differs * from the one known to the meta, and a DN with unknown * attributes is returned. * * FIXME: should we log anything, or delegate to dnNormalize2? */ if ( dnNormalize2( NULL, &ent.e_name, &ent.e_nname ) != LDAP_SUCCESS ) { return LDAP_INVALID_DN_SYNTAX; } /* * cache dn */ if ( li->cache.ttl != META_DNCACHE_DISABLED ) { ( void )meta_dncache_update_entry( &li->cache, &ent.e_nname, target ); } ent.e_id = 0; ent.e_attrs = 0; ent.e_private = 0; attrp = &ent.e_attrs; while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) { ldap_back_map( &li->targets[ target ]->at_map, &a, &mapped, BACKLDAP_REMAP ); if ( mapped.bv_val == NULL || mapped.bv_val[0] == '\0' ) { continue; } attr = ( Attribute * )ch_malloc( sizeof( Attribute ) ); if ( attr == NULL ) { continue; } attr->a_flags = 0; attr->a_next = 0; attr->a_desc = NULL; if ( slap_bv2ad( &mapped, &attr->a_desc, &text ) != LDAP_SUCCESS) { if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text ) != LDAP_SUCCESS) { #ifdef NEW_LOGGING LDAP_LOG( BACK_META, DETAIL1, "slap_bv2undef_ad(%s): %s\n", mapped.bv_val, text, 0 ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ANY, "slap_bv2undef_ad(%s): " "%s\n%s", mapped.bv_val, text, "" ); #endif /* !NEW_LOGGING */ ch_free( attr ); continue; } } /* no subschemaSubentry */ if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) { ch_free(attr); continue; } if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR || attr->a_vals == NULL ) { attr->a_vals = &dummy; } else if ( attr->a_desc == slap_schema.si_ad_objectClass || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) { int i, last; for ( last = 0; attr->a_vals[ last ].bv_val; ++last ); for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) { ldap_back_map( &li->targets[ target]->oc_map, bv, &mapped, BACKLDAP_REMAP ); if ( mapped.bv_val == NULL || mapped.bv_val[0] == '\0') { free( bv->bv_val ); bv->bv_val = NULL; if ( --last < 0 ) { break; } *bv = attr->a_vals[ last ]; attr->a_vals[ last ].bv_val = NULL; i--; } else if ( mapped.bv_val != bv->bv_val ) { free( bv->bv_val ); ber_dupbv( bv, &mapped ); } } /* * It is necessary to try to rewrite attributes with * dn syntax because they might be used in ACLs as * members of groups; since ACLs are applied to the * rewritten stuff, no dn-based subecj clause could * be used at the ldap backend side (see * http://www.OpenLDAP.org/faq/data/cache/452.html) * The problem can be overcome by moving the dn-based * ACLs to the target directory server, and letting * everything pass thru the ldap backend. */ } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid, SLAPD_DN_SYNTAX ) == 0 ) { int i; for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) { char *newval; switch ( rewrite_session( li->targets[ target ]->rwinfo, "searchResult", bv->bv_val, lc->conn, &newval )) { case REWRITE_REGEXEC_OK: /* left as is */ if ( newval == NULL ) { break; } #ifdef NEW_LOGGING LDAP_LOG( BACK_META, DETAIL1, "[rw] searchResult on attr=%s: \"%s\" -> \"%s\"\n", attr->a_desc->ad_type->sat_cname.bv_val, bv->bv_val, newval ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> searchResult on attr=%s:" " \"%s\" -> \"%s\"\n", attr->a_desc->ad_type->sat_cname.bv_val, bv->bv_val, newval ); #endif /* !NEW_LOGGING */ free( bv->bv_val ); bv->bv_val = newval; bv->bv_len = strlen( newval ); break; case REWRITE_REGEXEC_UNWILLING: case REWRITE_REGEXEC_ERR: /* * FIXME: better give up, * skip the attribute * or leave it untouched? */ break; } } } *attrp = attr; attrp = &attr->a_next; } send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL ); while ( ent.e_attrs ) { attr = ent.e_attrs; ent.e_attrs = attr->a_next; if ( attr->a_vals != &dummy ) { ber_bvarray_free( attr->a_vals ); } free( attr ); } if ( ent.e_dn && ent.e_dn != bdn.bv_val ) { free( ent.e_dn ); } if ( ent.e_ndn ) { free( ent.e_ndn ); } return LDAP_SUCCESS; } static int is_one_level_rdn( const char *rdn, int from ) { for ( ; from--; ) { if ( DN_SEPARATOR( rdn[ from ] ) ) { return 0; } } return 1; }