]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/controls.c
fix one-time leak
[openldap] / servers / slapd / controls.c
index 4592ee2aae20b0e304bb37e99083748669bc05b3..6caa711acec2dc7c9eb513099ba8487330497485 100644 (file)
@@ -1,7 +1,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1998-2006 The OpenLDAP Foundation.
+ * Copyright 1998-2012 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
 #include <ac/socket.h>
 
 #include "slap.h"
+#include "ldif.h"
+#include "lutil.h"
 
 #include "../../libraries/liblber/lber-int.h"
 
 static SLAP_CTRL_PARSE_FN parseAssert;
-static SLAP_CTRL_PARSE_FN parsePreRead;
-static SLAP_CTRL_PARSE_FN parsePostRead;
-static SLAP_CTRL_PARSE_FN parseProxyAuthz;
-#ifdef LDAP_DEVEL
+static SLAP_CTRL_PARSE_FN parseDomainScope;
 static SLAP_CTRL_PARSE_FN parseDontUseCopy;
-static SLAP_CTRL_PARSE_FN parseManageDIT;
-#endif
 static SLAP_CTRL_PARSE_FN parseManageDSAit;
 static SLAP_CTRL_PARSE_FN parseNoOp;
 static SLAP_CTRL_PARSE_FN parsePagedResults;
-#ifdef LDAP_DEVEL
+static SLAP_CTRL_PARSE_FN parsePermissiveModify;
+static SLAP_CTRL_PARSE_FN parsePreRead, parsePostRead;
+static SLAP_CTRL_PARSE_FN parseProxyAuthz;
+static SLAP_CTRL_PARSE_FN parseRelax;
+static SLAP_CTRL_PARSE_FN parseSearchOptions;
+#ifdef SLAP_CONTROL_X_SORTEDRESULTS
 static SLAP_CTRL_PARSE_FN parseSortedResults;
 #endif
-static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
-static SLAP_CTRL_PARSE_FN parsePermissiveModify;
-static SLAP_CTRL_PARSE_FN parseDomainScope;
+static SLAP_CTRL_PARSE_FN parseSubentries;
 #ifdef SLAP_CONTROL_X_TREE_DELETE
 static SLAP_CTRL_PARSE_FN parseTreeDelete;
 #endif
-static SLAP_CTRL_PARSE_FN parseSearchOptions;
-static SLAP_CTRL_PARSE_FN parseSubentries;
+static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+static SLAP_CTRL_PARSE_FN parseSessionTracking;
+#endif
+#ifdef SLAP_CONTROL_X_WHATFAILED
+static SLAP_CTRL_PARSE_FN parseWhatFailed;
+#endif
 
 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
 
@@ -106,11 +111,19 @@ static char *manageDSAit_extops[] = {
        NULL
 };
 
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+static char *session_tracking_extops[] = {
+       LDAP_EXOP_MODIFY_PASSWD,
+       LDAP_EXOP_WHO_AM_I,
+       LDAP_EXOP_REFRESH,
+       NULL
+};
+#endif
+
 static struct slap_control control_defs[] = {
        {  LDAP_CONTROL_ASSERT,
                (int)offsetof(struct slap_control_ids, sc_assert),
-               SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME|
-                       SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
+               SLAP_CTRL_UPDATE|SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
                NULL, NULL,
                parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
        { LDAP_CONTROL_PRE_READ,
@@ -133,7 +146,7 @@ static struct slap_control control_defs[] = {
                SLAP_CTRL_SEARCH,
                NULL, NULL,
                parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
-#ifdef LDAP_DEVEL
+#ifdef SLAP_CONTROL_X_SORTEDRESULTS
        { LDAP_CONTROL_SORTREQUEST,
                (int)offsetof(struct slap_control_ids, sc_sortedResults),
                SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
@@ -145,6 +158,11 @@ static struct slap_control control_defs[] = {
                SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
                NULL, NULL,
                parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+       { LDAP_CONTROL_DONTUSECOPY,
+               (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
+               SLAP_CTRL_GLOBAL|SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
+               NULL, NULL,
+               parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
        { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
                (int)offsetof(struct slap_control_ids, sc_permissiveModify),
                SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
@@ -172,18 +190,11 @@ static struct slap_control control_defs[] = {
                SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
                NULL, NULL,
                parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
-#ifdef LDAP_DEVEL
-       { LDAP_CONTROL_DONTUSECOPY,
-               (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
-               SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
-               NULL, NULL,
-               parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
-       { LDAP_CONTROL_MANAGEDIT,
-               (int)offsetof(struct slap_control_ids, sc_manageDIT),
+       { LDAP_CONTROL_RELAX,
+               (int)offsetof(struct slap_control_ids, sc_relax),
                SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
                NULL, NULL,
-               parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
-#endif
+               parseRelax, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 #ifdef LDAP_X_TXN
        { LDAP_CONTROL_X_TXN_SPEC,
                (int)offsetof(struct slap_control_ids, sc_txnSpec),
@@ -201,6 +212,21 @@ static struct slap_control control_defs[] = {
                SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS,
                proxy_authz_extops, NULL,
                parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+       { LDAP_CONTROL_X_SESSION_TRACKING,
+               (int)offsetof(struct slap_control_ids, sc_sessionTracking),
+               SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS|SLAP_CTRL_BIND|SLAP_CTRL_HIDE,
+               session_tracking_extops, NULL,
+               parseSessionTracking, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#endif
+#ifdef SLAP_CONTROL_X_WHATFAILED
+       { LDAP_CONTROL_X_WHATFAILED,
+               (int)offsetof(struct slap_control_ids, sc_whatFailed),
+               SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
+               NULL, NULL,
+               parseWhatFailed, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#endif
+
        { NULL, 0, 0, NULL, 0, NULL, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 };
 
@@ -318,6 +344,38 @@ register_supported_control2(const char *controloid,
        return LDAP_SUCCESS;
 }
 
+#ifdef SLAP_CONFIG_DELETE
+int
+unregister_supported_control( const char *controloid )
+{
+       struct slap_control *sc;
+       int i;
+
+       if ( controloid == NULL || (sc = find_ctrl( controloid )) == NULL ){
+               return -1;
+       }
+
+       for ( i = 0; slap_known_controls[ i ]; i++ ) {
+               if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
+                       do {
+                               slap_known_controls[ i ] = slap_known_controls[ i+1 ];
+                       } while ( slap_known_controls[ i++ ] );
+                       num_known_controls--;
+                       break;
+               }
+       }
+
+       LDAP_SLIST_REMOVE(&controls_list, sc, slap_control, sc_next);
+       ch_free( sc->sc_oid );
+       if ( sc->sc_extendedopsbv != NULL ) {
+               ber_bvarray_free( sc->sc_extendedopsbv );
+       }
+       ch_free( sc );
+
+       return 0;
+}
+#endif /* SLAP_CONFIG_DELETE */
+
 /*
  * One-time initialization of internal controls.
  */
@@ -420,7 +478,7 @@ get_supported_controls(char ***ctrloidsp,
        }
        masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
        if  ( masks == NULL ) {
-               ch_free( oids );
+               SLAP_FREE( oids );
                return LDAP_NO_MEMORY;
        }
 
@@ -513,6 +571,37 @@ void slap_free_ctrls(
        op->o_tmpfree( ctrls, op->o_tmpmemctx );
 }
 
+int slap_add_ctrls(
+       Operation *op,
+       SlapReply *rs,
+       LDAPControl **ctrls )
+{
+       int i = 0, j;
+       LDAPControl **ctrlsp;
+
+       if ( rs->sr_ctrls ) {
+               for ( ; rs->sr_ctrls[ i ]; i++ ) ;
+       }
+
+       for ( j=0; ctrls[j]; j++ ) ;
+
+       ctrlsp = op->o_tmpalloc(( i+j+1 )*sizeof(LDAPControl *), op->o_tmpmemctx );
+       i = 0;
+       if ( rs->sr_ctrls ) {
+               for ( ; rs->sr_ctrls[i]; i++ )
+                       ctrlsp[i] = rs->sr_ctrls[i];
+       }
+       for ( j=0; ctrls[j]; j++)
+               ctrlsp[i++] = ctrls[j];
+       ctrlsp[i] = NULL;
+
+       if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED )
+               op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
+       rs->sr_ctrls = ctrlsp;
+       rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
+       return i;
+}
+
 int slap_parse_ctrl(
        Operation *op,
        SlapReply *rs,
@@ -520,6 +609,7 @@ int slap_parse_ctrl(
        const char **text )
 {
        struct slap_control *sc;
+       int rc = LDAP_SUCCESS;
 
        sc = find_ctrl( control->ldctl_oid );
        if( sc != NULL ) {
@@ -575,31 +665,29 @@ int slap_parse_ctrl(
 
                if (( sc->sc_mask & tagmask ) == tagmask ) {
                        /* available extension */
-                       int     rc;
+                       if ( sc->sc_parse ) {
+                               rc = sc->sc_parse( op, rs, control );
+                               assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 
-                       if( !sc->sc_parse ) {
+                       } else if ( control->ldctl_iscritical ) {
                                *text = "not yet implemented";
-                               return LDAP_OTHER;
+                               rc = LDAP_OTHER;
                        }
 
-                       rc = sc->sc_parse( op, rs, control );
-                       if ( rc ) {
-                               assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
-                               return rc;
-                       }
 
-               } else if( control->ldctl_iscritical ) {
+               } else if ( control->ldctl_iscritical ) {
                        /* unavailable CRITICAL control */
                        *text = "critical extension is unavailable";
-                       return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
+                       rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
                }
-       } else if( control->ldctl_iscritical ) {
+
+       } else if ( control->ldctl_iscritical ) {
                /* unrecognized CRITICAL control */
                *text = "critical extension is not recognized";
-               return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
+               rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
        }
 
-       return LDAP_SUCCESS;
+       return rc;
 }
 
 int get_ctrls(
@@ -613,6 +701,15 @@ int get_ctrls(
        char *opaque;
        BerElement *ber = op->o_ber;
        struct berval bv;
+#ifdef SLAP_CONTROL_X_WHATFAILED
+       /* NOTE: right now, slapd checks the validity of each control
+        * while parsing.  As a consequence, it can only detect one
+        * cause of failure at a time.  This results in returning
+        * exactly one OID with the whatFailed control, or no control
+        * at all.
+        */
+       char *failed_oid = NULL;
+#endif
 
        len = ber_pvt_ber_remaining(ber);
 
@@ -753,6 +850,9 @@ int get_ctrls(
 
                rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
                if ( rs->sr_err != LDAP_SUCCESS ) {
+#ifdef SLAP_CONTROL_X_WHATFAILED
+                       failed_oid = c->ldctl_oid;
+#endif
                        goto return_results;
                }
        }
@@ -768,6 +868,71 @@ return_results:
                        send_ldap_disconnect( op, rs );
                        rs->sr_err = SLAPD_DISCONNECT;
                } else {
+#ifdef SLAP_CONTROL_X_WHATFAILED
+                       /* might have not been parsed yet? */
+                       if ( failed_oid != NULL ) {
+                               if ( !get_whatFailed( op ) ) {
+                                       /* look it up */
+
+                                       /* step through each remaining element */
+                                       for ( ; tag != LBER_ERROR; tag = ber_next_element( ber, &len, opaque ) )
+                                       {
+                                               LDAPControl c = { 0 };
+
+                                               tag = ber_scanf( ber, "{m" /*}*/, &bv );
+                                               c.ldctl_oid = bv.bv_val;
+
+                                               if ( tag == LBER_ERROR ) {
+                                                       slap_free_ctrls( op, op->o_ctrls );
+                                                       op->o_ctrls = NULL;
+                                                       break;
+
+                                               } else if ( c.ldctl_oid == NULL ) {
+                                                       slap_free_ctrls( op, op->o_ctrls );
+                                                       op->o_ctrls = NULL;
+                                                       break;
+                                               }
+
+                                               tag = ber_peek_tag( ber, &len );
+                                               if ( tag == LBER_BOOLEAN ) {
+                                                       ber_int_t crit;
+                                                       tag = ber_scanf( ber, "b", &crit );
+                                                       if( tag == LBER_ERROR ) {
+                                                               slap_free_ctrls( op, op->o_ctrls );
+                                                               op->o_ctrls = NULL;
+                                                               break;
+                                                       }
+
+                                                       tag = ber_peek_tag( ber, &len );
+                                               }
+
+                                               if ( tag == LBER_OCTETSTRING ) {
+                                                       tag = ber_scanf( ber, "m", &c.ldctl_value );
+
+                                                       if( tag == LBER_ERROR ) {
+                                                               slap_free_ctrls( op, op->o_ctrls );
+                                                               op->o_ctrls = NULL;
+                                                               break;
+                                                       }
+                                               }
+
+                                               if ( strcmp( c.ldctl_oid, LDAP_CONTROL_X_WHATFAILED ) == 0 ) {
+                                                       const char *text;
+                                                       slap_parse_ctrl( op, rs, &c, &text );
+                                                       break;
+                                               }
+                                       }
+                               }
+
+                               if ( get_whatFailed( op ) ) {
+                                       char *oids[ 2 ];
+                                       oids[ 0 ] = failed_oid;
+                                       oids[ 1 ] = NULL;
+                                       slap_ctrl_whatFailed_add( op, rs, oids );
+                               }
+                       }
+#endif
+
                        send_ldap_result( op, rs );
                }
        }
@@ -844,7 +1009,6 @@ slap_remove_control(
        return rs->sr_err;
 }
 
-#ifdef LDAP_DEVEL
 static int parseDontUseCopy (
        Operation *op,
        SlapReply *rs,
@@ -855,42 +1019,46 @@ static int parseDontUseCopy (
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len ) {
-               rs->sr_text = "dontUseCopy control value not empty";
+       if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "dontUseCopy control value not absent";
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_iscritical != SLAP_CONTROL_CRITICAL ) {
+       if ( ( global_disallows & SLAP_DISALLOW_DONTUSECOPY_N_CRIT )
+               && !ctrl->ldctl_iscritical )
+       {
                rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
                return LDAP_PROTOCOL_ERROR;
        }
 
-       op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
+       op->o_dontUseCopy = ctrl->ldctl_iscritical
+               ? SLAP_CONTROL_CRITICAL
+               : SLAP_CONTROL_NONCRITICAL;
+
        return LDAP_SUCCESS;
 }
 
-static int parseManageDIT (
+static int parseRelax (
        Operation *op,
        SlapReply *rs,
        LDAPControl *ctrl )
 {
-       if ( op->o_managedit != SLAP_CONTROL_NONE ) {
-               rs->sr_text = "manageDIT control specified multiple times";
+       if ( op->o_relax != SLAP_CONTROL_NONE ) {
+               rs->sr_text = "relax control specified multiple times";
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len ) {
-               rs->sr_text = "manageDIT control value not empty";
+       if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "relax control value not absent";
                return LDAP_PROTOCOL_ERROR;
        }
 
-       op->o_managedit = ctrl->ldctl_iscritical
+       op->o_relax = ctrl->ldctl_iscritical
                ? SLAP_CONTROL_CRITICAL
                : SLAP_CONTROL_NONCRITICAL;
 
        return LDAP_SUCCESS;
 }
-#endif
 
 static int parseManageDSAit (
        Operation *op,
@@ -902,8 +1070,8 @@ static int parseManageDSAit (
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len ) {
-               rs->sr_text = "manageDSAit control value not empty";
+       if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "manageDSAit control value not absent";
                return LDAP_PROTOCOL_ERROR;
        }
 
@@ -927,6 +1095,18 @@ static int parseProxyAuthz (
                return LDAP_PROTOCOL_ERROR;
        }
 
+       if ( BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "proxy authorization control value absent";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       if ( ( global_disallows & SLAP_DISALLOW_PROXY_AUTHZ_N_CRIT )
+               && !ctrl->ldctl_iscritical )
+       {
+               rs->sr_text = "proxied authorization criticality of FALSE not allowed";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
        if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
                && BER_BVISEMPTY( &op->o_ndn ) )
        {
@@ -944,7 +1124,7 @@ static int parseProxyAuthz (
                ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
                0 );
 
-       if ( ctrl->ldctl_value.bv_len == 0 ) {
+       if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
                Debug( LDAP_DEBUG_TRACE,
                        "parseProxyAuthz: conn=%lu anonymous\n", 
                        op->o_connid, 0, 0 );
@@ -989,15 +1169,13 @@ static int parseProxyAuthz (
        }
 
        ch_free( op->o_ndn.bv_val );
-       ch_free( op->o_dn.bv_val );
 
        /*
         * NOTE: since slap_sasl_getdn() returns a normalized dn,
         * from now on op->o_dn is normalized
         */
        op->o_ndn = dn;
-       ber_dupbv( &op->o_dn, &dn );
-
+       ber_bvreplace( &op->o_dn, &dn );
 
        Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
            op->o_log_prefix, dn.bv_val, 0, 0, 0 );
@@ -1015,7 +1193,7 @@ static int parseNoOp (
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len ) {
+       if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
                rs->sr_text = "noop control value not empty";
                return LDAP_PROTOCOL_ERROR;
        }
@@ -1032,20 +1210,26 @@ static int parsePagedResults (
        SlapReply *rs,
        LDAPControl *ctrl )
 {
+       BerElementBuffer berbuf;
+       BerElement      *ber = (BerElement *)&berbuf;
+       struct berval   cookie;
+       PagedResultsState       *ps;
        int             rc = LDAP_SUCCESS;
        ber_tag_t       tag;
        ber_int_t       size;
-       BerElement      *ber;
-       struct berval   cookie = BER_BVNULL;
-       PagedResultsState       *ps;
 
        if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
                rs->sr_text = "paged results control specified multiple times";
                return LDAP_PROTOCOL_ERROR;
        }
 
+       if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
+               rs->sr_text = "paged results control value is absent";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
        if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
-               rs->sr_text = "paged results control value is empty (or absent)";
+               rs->sr_text = "paged results control value is empty";
                return LDAP_PROTOCOL_ERROR;
        }
 
@@ -1057,11 +1241,7 @@ static int parsePagedResults (
         *              cookie  OCTET STRING
         * }
         */
-       ber = ber_init( &ctrl->ldctl_value );
-       if ( ber == NULL ) {
-               rs->sr_text = "internal error";
-               return LDAP_OTHER;
-       }
+       ber_init2( ber, &ctrl->ldctl_value, LBER_USE_DER );
 
        tag = ber_scanf( ber, "{im}", &size, &cookie );
 
@@ -1080,18 +1260,25 @@ static int parsePagedResults (
        ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
        *ps = op->o_conn->c_pagedresults_state;
        ps->ps_size = size;
+       ps->ps_cookieval = cookie;
        op->o_pagedresults_state = ps;
+       if ( !cookie.bv_len ) {
+               ps->ps_count = 0;
+               ps->ps_cookie = 0;
+               /* taint ps_cookie, to detect whether it's set */
+               op->o_conn->c_pagedresults_state.ps_cookie = NOID;
+       }
 
        /* NOTE: according to RFC 2696 3.:
 
     If the page size is greater than or equal to the sizeLimit value, the
     server should ignore the control as the request can be satisfied in a
     single page.
-        
+
         * NOTE: this assumes that the op->ors_slimit be set
         * before the controls are parsed.     
         */
-               
+
        if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
                op->o_pagedresults = SLAP_CONTROL_IGNORED;
 
@@ -1103,11 +1290,10 @@ static int parsePagedResults (
        }
 
 done:;
-       (void)ber_free( ber, 1 );
        return rc;
 }
 
-#ifdef LDAP_DEVEL
+#ifdef SLAP_CONTROL_X_SORTEDRESULTS
 static int parseSortedResults (
        Operation *op,
        SlapReply *rs,
@@ -1120,8 +1306,13 @@ static int parseSortedResults (
                return LDAP_PROTOCOL_ERROR;
        }
 
+       if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
+               rs->sr_text = "sorted results control value is absent";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
        if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
-               rs->sr_text = "sorted results control value is empty (or absent)";
+               rs->sr_text = "sorted results control value is empty";
                return LDAP_PROTOCOL_ERROR;
        }
 
@@ -1148,8 +1339,13 @@ static int parseAssert (
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len == 0 ) {
-               rs->sr_text = "assert control value is empty (or absent)";
+       if ( BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "assert control value is absent";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
+               rs->sr_text = "assert control value is empty";
                return LDAP_PROTOCOL_ERROR;
        }
 
@@ -1158,9 +1354,10 @@ static int parseAssert (
                rs->sr_text = "assert control: internal error";
                return LDAP_OTHER;
        }
-       
+
        rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
                &rs->sr_text);
+       (void) ber_free( ber, 1 );
        if( rs->sr_err != LDAP_SUCCESS ) {
                if( rs->sr_err == SLAPD_DISCONNECT ) {
                        rs->sr_err = LDAP_PROTOCOL_ERROR;
@@ -1170,7 +1367,7 @@ static int parseAssert (
                        send_ldap_result( op, rs );
                }
                if( op->o_assertion != NULL ) {
-                       filter_free_x( op, op->o_assertion );
+                       filter_free_x( op, op->o_assertion, 1 );
                }
                return rs->sr_err;
        }
@@ -1191,67 +1388,119 @@ static int parseAssert (
        return LDAP_SUCCESS;
 }
 
-static int parsePreRead (
+#define READMSG(post, msg) \
+       ( post ? "postread control: " msg : "preread control: " msg )
+
+static int
+parseReadAttrs(
        Operation *op,
        SlapReply *rs,
-       LDAPControl *ctrl )
+       LDAPControl *ctrl,
+       int post )
 {
-       ber_len_t siz, off, i;
-       AttributeName *an = NULL;
+       ber_len_t       siz, off, i;
        BerElement      *ber;
+       AttributeName   *an = NULL;
 
-       if ( op->o_preread != SLAP_CONTROL_NONE ) {
-               rs->sr_text = "preread control specified multiple times";
+       if ( ( post && op->o_postread != SLAP_CONTROL_NONE ) ||
+               ( !post && op->o_preread != SLAP_CONTROL_NONE ) )
+       {
+               rs->sr_text = READMSG( post, "specified multiple times" );
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len == 0 ) {
-               rs->sr_text = "preread control value is empty (or absent)";
+       if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
+               rs->sr_text = READMSG( post, "value is absent" );
                return LDAP_PROTOCOL_ERROR;
        }
 
+       if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
+               rs->sr_text = READMSG( post, "value is empty" );
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+#ifdef LDAP_X_TXN
        if ( op->o_txnSpec ) { /* temporary limitation */
-               rs->sr_text = "cannot perform pre-read in transaction";
+               rs->sr_text = READMSG( post, "cannot perform in transaction" );
                return LDAP_UNWILLING_TO_PERFORM;
        }
+#endif
 
-       ber = ber_init( &(ctrl->ldctl_value) );
-       if (ber == NULL) {
-               rs->sr_text = "preread control: internal error";
+       ber = ber_init( &ctrl->ldctl_value );
+       if ( ber == NULL ) {
+               rs->sr_text = READMSG( post, "internal error" );
                return LDAP_OTHER;
        }
 
+       rs->sr_err = LDAP_SUCCESS;
        siz = sizeof( AttributeName );
        off = offsetof( AttributeName, an_name );
        if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
-               rs->sr_text = "preread control: decoding error";
-               return LDAP_PROTOCOL_ERROR;
+               rs->sr_text = READMSG( post, "decoding error" );
+               rs->sr_err = LDAP_PROTOCOL_ERROR;
+               goto done;
        }
 
-       for( i=0; i<siz; i++ ) {
-               int             rc = LDAP_SUCCESS;
+       for ( i = 0; i < siz; i++ ) {
                const char      *dummy = NULL;
+               int             rc;
 
                an[i].an_desc = NULL;
                an[i].an_oc = NULL;
-               an[i].an_oc_exclude = 0;
+               an[i].an_flags = 0;
                rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
-               if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
-                       rs->sr_text = dummy
-                               ? dummy
-                               : "postread control: unknown attributeType";
-                       return rc;
+               if ( rc == LDAP_SUCCESS ) {
+                       an[i].an_name = an[i].an_desc->ad_cname;
+
+               } else {
+                       int                     j;
+                       static struct berval    special_attrs[] = {
+                               BER_BVC( LDAP_NO_ATTRS ),
+                               BER_BVC( LDAP_ALL_USER_ATTRIBUTES ),
+                               BER_BVC( LDAP_ALL_OPERATIONAL_ATTRIBUTES ),
+                               BER_BVNULL
+                       };
+
+                       /* deal with special attribute types */
+                       for ( j = 0; !BER_BVISNULL( &special_attrs[ j ] ); j++ ) {
+                               if ( bvmatch( &an[i].an_name, &special_attrs[ j ] ) ) {
+                                       an[i].an_name = special_attrs[ j ];
+                                       break;
+                               }
+                       }
+
+                       if ( BER_BVISNULL( &special_attrs[ j ] ) && ctrl->ldctl_iscritical ) {
+                               rs->sr_err = rc;
+                               rs->sr_text = dummy ? dummy
+                                       : READMSG( post, "unknown attributeType" );
+                               goto done;
+                       }
                }
        }
 
-       op->o_preread = ctrl->ldctl_iscritical
-               ? SLAP_CONTROL_CRITICAL
-               : SLAP_CONTROL_NONCRITICAL;
+       if ( post ) {
+               op->o_postread_attrs = an;
+               op->o_postread = ctrl->ldctl_iscritical
+                       ? SLAP_CONTROL_CRITICAL
+                       : SLAP_CONTROL_NONCRITICAL;
+       } else {
+               op->o_preread_attrs = an;
+               op->o_preread = ctrl->ldctl_iscritical
+                       ? SLAP_CONTROL_CRITICAL
+                       : SLAP_CONTROL_NONCRITICAL;
+       }
 
-       op->o_preread_attrs = an;
+done:
+       (void) ber_free( ber, 1 );
+       return rs->sr_err;
+}
 
-       rs->sr_err = LDAP_SUCCESS;
-       return LDAP_SUCCESS;
+static int parsePreRead (
+       Operation *op,
+       SlapReply *rs,
+       LDAPControl *ctrl )
+{
+       return parseReadAttrs( op, rs, ctrl, 0 );
 }
 
 static int parsePostRead (
@@ -1259,62 +1508,7 @@ static int parsePostRead (
        SlapReply *rs,
        LDAPControl *ctrl )
 {
-       ber_len_t siz, off, i;
-       AttributeName *an = NULL;
-       BerElement      *ber;
-
-       if ( op->o_postread != SLAP_CONTROL_NONE ) {
-               rs->sr_text = "postread control specified multiple times";
-               return LDAP_PROTOCOL_ERROR;
-       }
-
-       if ( ctrl->ldctl_value.bv_len == 0 ) {
-               rs->sr_text = "postread control value is empty (or absent)";
-               return LDAP_PROTOCOL_ERROR;
-       }
-
-       if ( op->o_txnSpec ) { /* temporary limitation */
-               rs->sr_text = "cannot perform post-read in transaction";
-               return LDAP_UNWILLING_TO_PERFORM;
-       }
-
-       ber = ber_init( &(ctrl->ldctl_value) );
-       if (ber == NULL) {
-               rs->sr_text = "postread control: internal error";
-               return LDAP_OTHER;
-       }
-
-       siz = sizeof( AttributeName );
-       off = offsetof( AttributeName, an_name );
-       if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
-               rs->sr_text = "postread control: decoding error";
-               return LDAP_PROTOCOL_ERROR;
-       }
-
-       for( i=0; i<siz; i++ ) {
-               int             rc = LDAP_SUCCESS;
-               const char      *dummy = NULL;
-
-               an[i].an_desc = NULL;
-               an[i].an_oc = NULL;
-               an[i].an_oc_exclude = 0;
-               rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
-               if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
-                       rs->sr_text = dummy
-                               ? dummy
-                               : "postread control: unknown attributeType";
-                       return rc;
-               }
-       }
-
-       op->o_postread = ctrl->ldctl_iscritical
-               ? SLAP_CONTROL_CRITICAL
-               : SLAP_CONTROL_NONCRITICAL;
-
-       op->o_postread_attrs = an;
-
-       rs->sr_err = LDAP_SUCCESS;
-       return LDAP_SUCCESS;
+       return parseReadAttrs( op, rs, ctrl, 1 );
 }
 
 static int parseValuesReturnFilter (
@@ -1330,8 +1524,13 @@ static int parseValuesReturnFilter (
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len == 0 ) {
-               rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
+       if ( BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "valuesReturnFilter control value is absent";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
+               rs->sr_text = "valuesReturnFilter control value is empty";
                return LDAP_PROTOCOL_ERROR;
        }
 
@@ -1340,10 +1539,12 @@ static int parseValuesReturnFilter (
                rs->sr_text = "internal error";
                return LDAP_OTHER;
        }
-       
+
        rs->sr_err = get_vrFilter( op, ber,
                (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
 
+       (void) ber_free( ber, 1 );
+
        if( rs->sr_err != LDAP_SUCCESS ) {
                if( rs->sr_err == SLAPD_DISCONNECT ) {
                        rs->sr_err = LDAP_PROTOCOL_ERROR;
@@ -1412,8 +1613,8 @@ static int parsePermissiveModify (
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len ) {
-               rs->sr_text = "permissiveModify control value not empty";
+       if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "permissiveModify control value not absent";
                return LDAP_PROTOCOL_ERROR;
        }
 
@@ -1434,7 +1635,7 @@ static int parseDomainScope (
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len ) {
+       if ( BER_BVISNULL( &ctrl->ldctl_value )) {
                rs->sr_text = "domainScope control value not empty";
                return LDAP_PROTOCOL_ERROR;
        }
@@ -1457,8 +1658,8 @@ static int parseTreeDelete (
                return LDAP_PROTOCOL_ERROR;
        }
 
-       if ( ctrl->ldctl_value.bv_len ) {
-               rs->sr_text = "treeDelete control value not empty";
+       if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "treeDelete control value not absent";
                return LDAP_PROTOCOL_ERROR;
        }
 
@@ -1479,8 +1680,13 @@ static int parseSearchOptions (
        ber_int_t search_flags;
        ber_tag_t tag;
 
-       if ( ctrl->ldctl_value.bv_len == 0 ) {
-               rs->sr_text = "searchOptions control value is empty (or absent)";
+       if ( BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "searchOptions control value is absent";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
+               rs->sr_text = "searchOptions control value is empty";
                return LDAP_PROTOCOL_ERROR;
        }
 
@@ -1490,12 +1696,31 @@ static int parseSearchOptions (
                return LDAP_OTHER;
        }
 
-       if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
+       tag = ber_scanf( ber, "{i}", &search_flags );
+       (void) ber_free( ber, 1 );
+
+       if ( tag == LBER_ERROR ) {
                rs->sr_text = "searchOptions control decoding error";
                return LDAP_PROTOCOL_ERROR;
        }
 
-       (void) ber_free( ber, 1 );
+       if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
+               /* Search flags not recognised so far,
+                * including:
+                *              LDAP_SEARCH_FLAG_PHANTOM_ROOT
+                */
+               if ( ctrl->ldctl_iscritical ) {
+                       rs->sr_text = "searchOptions contained unrecognized flag";
+                       return LDAP_UNWILLING_TO_PERFORM;
+               }
+
+               /* Ignore */
+               Debug( LDAP_DEBUG_TRACE,
+                       "searchOptions: conn=%lu unrecognized flag(s) 0x%x (non-critical)\n", 
+                       op->o_connid, (unsigned)search_flags, 0 );
+
+               return LDAP_SUCCESS;
+       }
 
        if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
                if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
@@ -1509,15 +1734,389 @@ static int parseSearchOptions (
                        : SLAP_CONTROL_NONCRITICAL;
        }
 
-       if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
-               /* Other search flags not recognised so far,
-                * including:
-                *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
-                */
-               rs->sr_text = "searchOptions contained unrecognized flag";
-               return LDAP_UNWILLING_TO_PERFORM;
+       return LDAP_SUCCESS;
+}
+
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+struct berval session_tracking_formats[] = {
+       BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_RADIUS_ACCT_SESSION_ID ),
+               BER_BVC( "RADIUS-Acct-Session-Id" ),
+       BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_RADIUS_ACCT_MULTI_SESSION_ID ),
+               BER_BVC( "RADIUS-Acct-Multi-Session-Id" ),
+       BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_USERNAME ),
+               BER_BVC( "USERNAME" ),
+
+       BER_BVNULL
+};
+
+static int parseSessionTracking(
+       Operation *op,
+       SlapReply *rs,
+       LDAPControl *ctrl )
+{
+       BerElement              *ber;
+       ber_tag_t               tag;
+       ber_len_t               len;
+       int                     i, rc;
+
+       struct berval           sessionSourceIp = BER_BVNULL,
+                               sessionSourceName = BER_BVNULL,
+                               formatOID = BER_BVNULL,
+                               sessionTrackingIdentifier = BER_BVNULL;
+
+       size_t                  st_len, st_pos;
+
+       if ( ctrl->ldctl_iscritical ) {
+               rs->sr_text = "sessionTracking criticality is TRUE";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
+               rs->sr_text = "sessionTracking control value is absent";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
+               rs->sr_text = "sessionTracking control value is empty";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       /* TODO: add the capability to determine if a client is allowed
+        * to use this control, based on identity, ip and so */
+
+       ber = ber_init( &ctrl->ldctl_value );
+       if ( ber == NULL ) {
+               rs->sr_text = "internal error";
+               return LDAP_OTHER;
+       }
+
+       tag = ber_skip_tag( ber, &len );
+       if ( tag != LBER_SEQUENCE ) {
+               tag = LBER_ERROR;
+               goto error;
+       }
+
+       /* sessionSourceIp */
+       tag = ber_peek_tag( ber, &len );
+       if ( tag == LBER_DEFAULT ) {
+               tag = LBER_ERROR;
+               goto error;
+       }
+
+       if ( len == 0 ) {
+               tag = ber_skip_tag( ber, &len );
+
+       } else if ( len > 128 ) {
+               rs->sr_text = "sessionTracking.sessionSourceIp too long";
+               rs->sr_err = LDAP_PROTOCOL_ERROR;
+               goto error;
+
+       } else {
+               tag = ber_scanf( ber, "m", &sessionSourceIp );
+       }
+
+       if ( ldif_is_not_printable( sessionSourceIp.bv_val, sessionSourceIp.bv_len ) ) {
+               BER_BVZERO( &sessionSourceIp );
+       }
+
+       /* sessionSourceName */
+       tag = ber_peek_tag( ber, &len );
+       if ( tag == LBER_DEFAULT ) {
+               tag = LBER_ERROR;
+               goto error;
+       }
+
+       if ( len == 0 ) {
+               tag = ber_skip_tag( ber, &len );
+
+       } else if ( len > 65536 ) {
+               rs->sr_text = "sessionTracking.sessionSourceName too long";
+               rs->sr_err = LDAP_PROTOCOL_ERROR;
+               goto error;
+
+       } else {
+               tag = ber_scanf( ber, "m", &sessionSourceName );
+       }
+
+       if ( ldif_is_not_printable( sessionSourceName.bv_val, sessionSourceName.bv_len ) ) {
+               BER_BVZERO( &sessionSourceName );
+       }
+
+       /* formatOID */
+       tag = ber_peek_tag( ber, &len );
+       if ( tag == LBER_DEFAULT ) {
+               tag = LBER_ERROR;
+               goto error;
+       }
+
+       if ( len == 0 ) {
+               rs->sr_text = "sessionTracking.formatOID empty";
+               rs->sr_err = LDAP_PROTOCOL_ERROR;
+               goto error;
+
+       } else if ( len > 1024 ) {
+               rs->sr_text = "sessionTracking.formatOID too long";
+               rs->sr_err = LDAP_PROTOCOL_ERROR;
+               goto error;
+
+       } else {
+               tag = ber_scanf( ber, "m", &formatOID );
+       }
+
+       rc = numericoidValidate( NULL, &formatOID );
+       if ( rc != LDAP_SUCCESS ) {
+               rs->sr_text = "sessionTracking.formatOID invalid";
+               goto error;
+       }
+
+       for ( i = 0; !BER_BVISNULL( &session_tracking_formats[ i ] ); i += 2 )
+       {
+               if ( bvmatch( &formatOID, &session_tracking_formats[ i ] ) ) {
+                       formatOID = session_tracking_formats[ i + 1 ];
+                       break;
+               }
+       }
+
+       /* sessionTrackingIdentifier */
+       tag = ber_peek_tag( ber, &len );
+       if ( tag == LBER_DEFAULT ) {
+               tag = LBER_ERROR;
+               goto error;
+       }
+
+       if ( len == 0 ) {
+               tag = ber_skip_tag( ber, &len );
+
+       } else {
+               /* note: should not be more than 65536... */
+               tag = ber_scanf( ber, "m", &sessionTrackingIdentifier );
+               if ( ldif_is_not_printable( sessionTrackingIdentifier.bv_val, sessionTrackingIdentifier.bv_len ) ) {
+                       /* we want the OID printed, at least */
+                       BER_BVSTR( &sessionTrackingIdentifier, "" );
+               }
+       }
+
+       /* closure */
+       tag = ber_skip_tag( ber, &len );
+       if ( tag != LBER_DEFAULT || len != 0 ) {
+               tag = LBER_ERROR;
+               goto error;
        }
+       tag = 0;
+
+       st_len = 0;
+       if ( !BER_BVISNULL( &sessionSourceIp ) ) {
+               st_len += STRLENOF( "IP=" ) + sessionSourceIp.bv_len;
+       }
+       if ( !BER_BVISNULL( &sessionSourceName ) ) {
+               if ( st_len ) st_len++;
+               st_len += STRLENOF( "NAME=" ) + sessionSourceName.bv_len;
+       }
+       if ( !BER_BVISNULL( &sessionTrackingIdentifier ) ) {
+               if ( st_len ) st_len++;
+               st_len += formatOID.bv_len + STRLENOF( "=" )
+                       + sessionTrackingIdentifier.bv_len;
+       }
+
+       if ( st_len == 0 ) {
+               goto error;
+       }
+
+       st_len += STRLENOF( " []" );
+       st_pos = strlen( op->o_log_prefix );
+
+       if ( sizeof( op->o_log_prefix ) - st_pos > st_len ) {
+               char    *ptr = &op->o_log_prefix[ st_pos ];
+
+               ptr = lutil_strcopy( ptr, " [" /*]*/ );
+
+               st_len = 0;
+               if ( !BER_BVISNULL( &sessionSourceIp ) ) {
+                       ptr = lutil_strcopy( ptr, "IP=" );
+                       ptr = lutil_strcopy( ptr, sessionSourceIp.bv_val );
+                       st_len++;
+               }
+
+               if ( !BER_BVISNULL( &sessionSourceName ) ) {
+                       if ( st_len ) *ptr++ = ' ';
+                       ptr = lutil_strcopy( ptr, "NAME=" );
+                       ptr = lutil_strcopy( ptr, sessionSourceName.bv_val );
+                       st_len++;
+               }
+
+               if ( !BER_BVISNULL( &sessionTrackingIdentifier ) ) {
+                       if ( st_len ) *ptr++ = ' ';
+                       ptr = lutil_strcopy( ptr, formatOID.bv_val );
+                       *ptr++ = '=';
+                       ptr = lutil_strcopy( ptr, sessionTrackingIdentifier.bv_val );
+               }
+
+               *ptr++ = /*[*/ ']';
+               *ptr = '\0';
+       }
+
+error:;
+       (void)ber_free( ber, 1 );
+
+       if ( tag == LBER_ERROR ) {
+               rs->sr_text = "sessionTracking control decoding error";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+
+       return rs->sr_err;
+}
+
+int
+slap_ctrl_session_tracking_add(
+       Operation *op,
+       SlapReply *rs,
+       struct berval *ip,
+       struct berval *name,
+       struct berval *id,
+       LDAPControl *ctrl )
+{
+       BerElementBuffer berbuf;
+       BerElement      *ber = (BerElement *)&berbuf;
+
+       static struct berval    oid = BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_USERNAME );
+
+       assert( ctrl != NULL );
+
+       ber_init2( ber, NULL, LBER_USE_DER );
+
+       ber_printf( ber, "{OOOO}", ip, name, &oid, id ); 
+
+       if ( ber_flatten2( ber, &ctrl->ldctl_value, 0 ) == -1 ) {
+               rs->sr_err = LDAP_OTHER;
+               goto done;
+       }
+
+       ctrl->ldctl_oid = LDAP_CONTROL_X_SESSION_TRACKING;
+       ctrl->ldctl_iscritical = 0;
+
+       rs->sr_err = LDAP_SUCCESS;
+
+done:;
+       return rs->sr_err;
+}
+
+int
+slap_ctrl_session_tracking_request_add( Operation *op, SlapReply *rs, LDAPControl *ctrl )
+{
+       static struct berval    bv_unknown = BER_BVC( SLAP_STRING_UNKNOWN );
+       struct berval           ip = BER_BVNULL,
+                               name = BER_BVNULL,
+                               id = BER_BVNULL;
+
+       if ( !BER_BVISNULL( &op->o_conn->c_peer_name ) &&
+               memcmp( op->o_conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
+       {
+               char    *ptr;
+
+               ip.bv_val = op->o_conn->c_peer_name.bv_val + STRLENOF( "IP=" );
+               ip.bv_len = op->o_conn->c_peer_name.bv_len - STRLENOF( "IP=" );
+
+               ptr = ber_bvchr( &ip, ':' );
+               if ( ptr ) {
+                       ip.bv_len = ptr - ip.bv_val;
+               }
+       }
+
+       if ( !BER_BVISNULL( &op->o_conn->c_peer_domain ) &&
+               !bvmatch( &op->o_conn->c_peer_domain, &bv_unknown ) )
+       {
+               name = op->o_conn->c_peer_domain;
+       }
+
+       if ( !BER_BVISNULL( &op->o_dn ) && !BER_BVISEMPTY( &op->o_dn ) ) {
+               id = op->o_dn;
+       }
+
+       return slap_ctrl_session_tracking_add( op, rs, &ip, &name, &id, ctrl );
+}
+#endif
+
+#ifdef SLAP_CONTROL_X_WHATFAILED
+static int parseWhatFailed(
+       Operation *op,
+       SlapReply *rs,
+       LDAPControl *ctrl )
+{
+       if ( op->o_whatFailed != SLAP_CONTROL_NONE ) {
+               rs->sr_text = "\"WHat Failed?\" control specified multiple times";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+               rs->sr_text = "\"What Failed?\" control value not absent";
+               return LDAP_PROTOCOL_ERROR;
+       }
+
+       op->o_whatFailed = ctrl->ldctl_iscritical
+               ? SLAP_CONTROL_CRITICAL
+               : SLAP_CONTROL_NONCRITICAL;
 
        return LDAP_SUCCESS;
 }
 
+int
+slap_ctrl_whatFailed_add(
+       Operation *op,
+       SlapReply *rs,
+       char **oids )
+{
+       BerElementBuffer berbuf;
+       BerElement *ber = (BerElement *) &berbuf;
+       LDAPControl **ctrls = NULL;
+       struct berval ctrlval;
+       int i, rc = LDAP_SUCCESS;
+
+       ber_init2( ber, NULL, LBER_USE_DER );
+       ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
+       ber_printf( ber, "[" /*]*/ );
+       for ( i = 0; oids[ i ] != NULL; i++ ) {
+               ber_printf( ber, "s", oids[ i ] );
+       }
+       ber_printf( ber, /*[*/ "]" );
+
+       if ( ber_flatten2( ber, &ctrlval, 0 ) == -1 ) {
+               rc = LDAP_OTHER;
+               goto done;
+       }
+
+       i = 0;
+       if ( rs->sr_ctrls != NULL ) {
+               for ( ; rs->sr_ctrls[ i ] != NULL; i++ ) {
+                       if ( strcmp( rs->sr_ctrls[ i ]->ldctl_oid, LDAP_CONTROL_X_WHATFAILED ) != 0 ) {
+                               /* TODO: add */
+                               assert( 0 );
+                       }
+               }
+       }
+
+       ctrls = op->o_tmprealloc( rs->sr_ctrls,
+                       sizeof(LDAPControl *)*( i + 2 )
+                       + sizeof(LDAPControl)
+                       + ctrlval.bv_len + 1,
+                       op->o_tmpmemctx );
+       if ( ctrls == NULL ) {
+               rc = LDAP_OTHER;
+               goto done;
+       }
+       ctrls[ i + 1 ] = NULL;
+       ctrls[ i ] = (LDAPControl *)&ctrls[ i + 2 ];
+       ctrls[ i ]->ldctl_oid = LDAP_CONTROL_X_WHATFAILED;
+       ctrls[ i ]->ldctl_iscritical = 0;
+       ctrls[ i ]->ldctl_value.bv_val = (char *)&ctrls[ i ][ 1 ];
+       AC_MEMCPY( ctrls[ i ]->ldctl_value.bv_val, ctrlval.bv_val, ctrlval.bv_len + 1 );
+       ctrls[ i ]->ldctl_value.bv_len = ctrlval.bv_len;
+
+       ber_free_buf( ber );
+
+       rs->sr_ctrls = ctrls;
+
+done:;
+       return rc;
+}
+#endif