1 /* $NetBSD: referral.c,v 1.1.1.3 2010/12/12 15:23:01 adam Exp $ */ 2 3 /* referral.c - DNS SRV backend referral handler */ 4 /* OpenLDAP: pkg/ldap/servers/slapd/back-dnssrv/referral.c,v 1.26.2.6 2010/04/13 20:23:27 kurt Exp */ 5 /* This work is part of OpenLDAP Software <http://www.openldap.org/>. 6 * 7 * Copyright 2000-2010 The OpenLDAP Foundation. 8 * Portions Copyright 2000-2003 Kurt D. Zeilenga. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted only as authorized by the OpenLDAP 13 * Public License. 14 * 15 * A copy of this license is available in the file LICENSE in the 16 * top-level directory of the distribution or, alternatively, at 17 * <http://www.OpenLDAP.org/license.html>. 18 */ 19 /* ACKNOWLEDGEMENTS: 20 * This work was originally developed by Kurt D. Zeilenga for inclusion 21 * in OpenLDAP Software. 22 */ 23 24 #include "portable.h" 25 26 #include <stdio.h> 27 28 #include <ac/string.h> 29 #include <ac/socket.h> 30 31 #include "slap.h" 32 #include "proto-dnssrv.h" 33 34 int 35 dnssrv_back_referrals( 36 Operation *op, 37 SlapReply *rs ) 38 { 39 int i; 40 int rc = LDAP_OTHER; 41 char *domain = NULL; 42 char *hostlist = NULL; 43 char **hosts = NULL; 44 BerVarray urls = NULL; 45 46 if ( BER_BVISEMPTY( &op->o_req_dn ) ) { 47 /* FIXME: need some means to determine whether the database 48 * is a glue instance */ 49 if ( SLAP_GLUE_INSTANCE( op->o_bd ) ) { 50 return LDAP_SUCCESS; 51 } 52 53 rs->sr_text = "DNS SRV operation upon null (empty) DN disallowed"; 54 return LDAP_UNWILLING_TO_PERFORM; 55 } 56 57 if( get_manageDSAit( op ) ) { 58 if( op->o_tag == LDAP_REQ_SEARCH ) { 59 return LDAP_SUCCESS; 60 } 61 62 rs->sr_text = "DNS SRV problem processing manageDSAit control"; 63 return LDAP_OTHER; 64 } 65 66 if( ldap_dn2domain( op->o_req_dn.bv_val, &domain ) || domain == NULL ) { 67 rs->sr_err = LDAP_REFERRAL; 68 rs->sr_ref = default_referral; 69 send_ldap_result( op, rs ); 70 rs->sr_ref = NULL; 71 return LDAP_REFERRAL; 72 } 73 74 Debug( LDAP_DEBUG_TRACE, "DNSSRV: dn=\"%s\" -> domain=\"%s\"\n", 75 op->o_req_dn.bv_val, domain, 0 ); 76 77 i = ldap_domain2hostlist( domain, &hostlist ); 78 if ( i ) { 79 Debug( LDAP_DEBUG_TRACE, 80 "DNSSRV: domain2hostlist(%s) returned %d\n", 81 domain, i, 0 ); 82 rs->sr_text = "no DNS SRV RR available for DN"; 83 rc = LDAP_NO_SUCH_OBJECT; 84 goto done; 85 } 86 87 hosts = ldap_str2charray( hostlist, " " ); 88 89 if( hosts == NULL ) { 90 Debug( LDAP_DEBUG_TRACE, "DNSSRV: str2charrary error\n", 0, 0, 0 ); 91 rs->sr_text = "problem processing DNS SRV records for DN"; 92 goto done; 93 } 94 95 for( i=0; hosts[i] != NULL; i++) { 96 struct berval url; 97 98 url.bv_len = STRLENOF( "ldap://" ) + strlen( hosts[i] ); 99 url.bv_val = ch_malloc( url.bv_len + 1 ); 100 101 strcpy( url.bv_val, "ldap://" ); 102 strcpy( &url.bv_val[STRLENOF( "ldap://" )], hosts[i] ); 103 104 if ( ber_bvarray_add( &urls, &url ) < 0 ) { 105 free( url.bv_val ); 106 rs->sr_text = "problem processing DNS SRV records for DN"; 107 goto done; 108 } 109 } 110 111 Statslog( LDAP_DEBUG_STATS, 112 "%s DNSSRV p=%d dn=\"%s\" url=\"%s\"\n", 113 op->o_log_prefix, op->o_protocol, 114 op->o_req_dn.bv_val, urls[0].bv_val, 0 ); 115 116 Debug( LDAP_DEBUG_TRACE, "DNSSRV: dn=\"%s\" -> url=\"%s\"\n", 117 op->o_req_dn.bv_val, urls[0].bv_val, 0 ); 118 119 rs->sr_ref = urls; 120 send_ldap_error( op, rs, LDAP_REFERRAL, 121 "DNS SRV generated referrals" ); 122 rs->sr_ref = NULL; 123 rc = LDAP_REFERRAL; 124 125 done: 126 if( domain != NULL ) ch_free( domain ); 127 if( hostlist != NULL ) ch_free( hostlist ); 128 if( hosts != NULL ) ldap_charray_free( hosts ); 129 ber_bvarray_free( urls ); 130 return rc; 131 } 132