/* $NetBSD: referral.c,v 1.1.1.6.6.1 2019/08/10 06:17:18 martin Exp $ */ /* referral.c - DNS SRV backend referral handler */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 2000-2019 The OpenLDAP Foundation. * Portions Copyright 2000-2003 Kurt D. Zeilenga. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ /* ACKNOWLEDGEMENTS: * This work was originally developed by Kurt D. Zeilenga for inclusion * in OpenLDAP Software. */ #include __RCSID("$NetBSD: referral.c,v 1.1.1.6.6.1 2019/08/10 06:17:18 martin Exp $"); #include "portable.h" #include #include #include #include "slap.h" #include "proto-dnssrv.h" int dnssrv_back_referrals( Operation *op, SlapReply *rs ) { int i; int rc = LDAP_OTHER; char *domain = NULL; char *hostlist = NULL; char **hosts = NULL; BerVarray urls = NULL; if ( BER_BVISEMPTY( &op->o_req_dn ) ) { /* FIXME: need some means to determine whether the database * is a glue instance */ if ( SLAP_GLUE_INSTANCE( op->o_bd ) ) { return LDAP_SUCCESS; } rs->sr_text = "DNS SRV operation upon null (empty) DN disallowed"; return LDAP_UNWILLING_TO_PERFORM; } if( get_manageDSAit( op ) ) { if( op->o_tag == LDAP_REQ_SEARCH ) { return LDAP_SUCCESS; } rs->sr_text = "DNS SRV problem processing manageDSAit control"; return LDAP_OTHER; } if( ldap_dn2domain( op->o_req_dn.bv_val, &domain ) || domain == NULL ) { rs->sr_err = LDAP_REFERRAL; rs->sr_ref = default_referral; send_ldap_result( op, rs ); rs->sr_ref = NULL; return LDAP_REFERRAL; } Debug( LDAP_DEBUG_TRACE, "DNSSRV: dn=\"%s\" -> domain=\"%s\"\n", op->o_req_dn.bv_val, domain, 0 ); i = ldap_domain2hostlist( domain, &hostlist ); if ( i ) { Debug( LDAP_DEBUG_TRACE, "DNSSRV: domain2hostlist(%s) returned %d\n", domain, i, 0 ); rs->sr_text = "no DNS SRV RR available for DN"; rc = LDAP_NO_SUCH_OBJECT; goto done; } hosts = ldap_str2charray( hostlist, " " ); if( hosts == NULL ) { Debug( LDAP_DEBUG_TRACE, "DNSSRV: str2charrary error\n", 0, 0, 0 ); rs->sr_text = "problem processing DNS SRV records for DN"; goto done; } for( i=0; hosts[i] != NULL; i++) { struct berval url; url.bv_len = STRLENOF( "ldap://" ) + strlen( hosts[i] ); url.bv_val = ch_malloc( url.bv_len + 1 ); strcpy( url.bv_val, "ldap://" ); strcpy( &url.bv_val[STRLENOF( "ldap://" )], hosts[i] ); if ( ber_bvarray_add( &urls, &url ) < 0 ) { free( url.bv_val ); rs->sr_text = "problem processing DNS SRV records for DN"; goto done; } } Statslog( LDAP_DEBUG_STATS, "%s DNSSRV p=%d dn=\"%s\" url=\"%s\"\n", op->o_log_prefix, op->o_protocol, op->o_req_dn.bv_val, urls[0].bv_val, 0 ); Debug( LDAP_DEBUG_TRACE, "DNSSRV: dn=\"%s\" -> url=\"%s\"\n", op->o_req_dn.bv_val, urls[0].bv_val, 0 ); rs->sr_ref = urls; send_ldap_error( op, rs, LDAP_REFERRAL, "DNS SRV generated referrals" ); rs->sr_ref = NULL; rc = LDAP_REFERRAL; done: if( domain != NULL ) ch_free( domain ); if( hostlist != NULL ) ch_free( hostlist ); if( hosts != NULL ) ldap_charray_free( hosts ); ber_bvarray_free( urls ); return rc; }