]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/connection.c
Free bind callback
[openldap] / servers / slapd / connection.c
index 8570a4a16322c33c1abb63edf8825240c7c97072..65141327004c1b06ca533dac8bfe52357949f42d 100644 (file)
@@ -1,7 +1,26 @@
 /* $OpenLDAP$ */
-/*
- * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2005 The OpenLDAP Foundation.
+ * 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
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of Michigan at Ann Arbor. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
  */
 
 #include "portable.h"
 #include "lutil.h"
 #include "slap.h"
 
+#ifdef LDAP_SLAPI
+#include "slapi/slapi.h"
+#endif
+
 /* protected by connections_mutex */
 static ldap_pvt_thread_mutex_t connections_mutex;
 static Connection *connections = NULL;
+
+static ldap_pvt_thread_mutex_t conn_nextid_mutex;
 static unsigned long conn_nextid = 0;
 
 /* structure state (protected by connections_mutex) */
@@ -35,16 +60,18 @@ static unsigned long conn_nextid = 0;
 #define SLAP_C_ACTIVE                  0x02    /* one or more threads */
 #define SLAP_C_BINDING                 0x03    /* binding */
 #define SLAP_C_CLOSING                 0x04    /* closing */
+#define SLAP_C_CLIENT                  0x05    /* outbound client conn */
 
 const char *
 connection_state2str( int state )
 {
        switch( state ) {
-       case SLAP_C_INVALID:    return "!";             
-       case SLAP_C_INACTIVE:   return "|";             
-       case SLAP_C_ACTIVE:             return "";                      
+       case SLAP_C_INVALID:    return "!";
+       case SLAP_C_INACTIVE:   return "|";
+       case SLAP_C_ACTIVE:             return "";
        case SLAP_C_BINDING:    return "B";
-       case SLAP_C_CLOSING:    return "C";                     
+       case SLAP_C_CLOSING:    return "C";
+       case SLAP_C_CLIENT:             return "L";
        }
 
        return "?";
@@ -55,27 +82,26 @@ static Connection* connection_get( ber_socket_t s );
 static int connection_input( Connection *c );
 static void connection_close( Connection *c );
 
-static int connection_op_activate( Connection *conn, Operation *op );
+static int connection_op_activate( Operation *op );
 static int connection_resched( Connection *conn );
 static void connection_abandon( Connection *conn );
 static void connection_destroy( Connection *c );
 
-struct co_arg {
-       Connection      *co_conn;
-       Operation       *co_op;
-};
+static ldap_pvt_thread_start_t connection_operation;
 
 /*
  * Initialize connection management infrastructure.
  */
 int connections_init(void)
 {
+       int i;
+
        assert( connections == NULL );
 
        if( connections != NULL) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, INFO,
-                          "connections_init:  already initialized.\n", 0, 0, 0 );
+                       "connections_init: already initialized.\n", 0, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
                        0, 0, 0 );
@@ -85,14 +111,15 @@ int connections_init(void)
 
        /* should check return of every call */
        ldap_pvt_thread_mutex_init( &connections_mutex );
+       ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
 
-       connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
+       connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 
        if( connections == NULL ) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR,
-                          "connections_init: allocation (%d * %ld) of connection "
-                          "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
+                       "connections_init: allocation (%d * %ld) of connection "
+                       "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
 #else
                Debug( LDAP_DEBUG_ANY,
                        "connections_init: allocation (%d*%ld) of connection array failed\n",
@@ -101,8 +128,10 @@ int connections_init(void)
                return -1;
        }
 
-    assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
-    assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
+       assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
+       assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
+
+       for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
 
        /*
         * per entry initialization of the Connection array initialization
@@ -124,7 +153,7 @@ int connections_destroy(void)
        if( connections == NULL) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, INFO,
-                          "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
+                       "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
                        0, 0, 0 );
@@ -138,6 +167,11 @@ int connections_destroy(void)
                        ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
                        ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
                        ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
+#ifdef LDAP_SLAPI
+                       if ( slapi_plugins_used ) {
+                               slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &connections[i] );
+                       }
+#endif
                }
        }
 
@@ -145,6 +179,7 @@ int connections_destroy(void)
        connections = NULL;
 
        ldap_pvt_thread_mutex_destroy( &connections_mutex );
+       ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
        return 0;
 }
 
@@ -161,6 +196,12 @@ int connections_shutdown(void)
                if( connections[i].c_struct_state != SLAP_C_USED ) {
                        continue;
                }
+               /* give persistent clients a chance to cleanup */
+               if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
+                       ldap_pvt_thread_pool_submit( &connection_pool,
+                       connections[i].c_clientfunc, connections[i].c_clientarg );
+                       continue;
+               }
 
                ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 
@@ -189,6 +230,11 @@ int connections_timeout_idle(time_t now)
                c != NULL;
                c = connection_next( c, &connindex ) )
        {
+               /* Don't timeout a slow-running request or a persistent
+                * outbound connection */
+               if( c->c_n_ops_executing ||
+                       c->c_conn_state == SLAP_C_CLIENT ) continue;
+
                if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
                        /* close it */
                        connection_closing( c );
@@ -273,7 +319,7 @@ static Connection* connection_get( ber_socket_t s )
 
 #ifdef NEW_LOGGING
                        LDAP_LOG( CONNECTION, ARGS, 
-                               "connection_get:  connection %d not used\n", s, 0, 0 );
+                               "connection_get: connection %d not used\n", s, 0, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE,
                                "connection_get(%d): connection not used\n",
@@ -318,35 +364,33 @@ static void connection_return( Connection *c )
 
 long connection_init(
        ber_socket_t s,
-       const char* url,
+       Listener *listener,
        const char* dnsname,
        const char* peername,
-       const char* sockname,
-       int tls_udp_option,
+       int flags,
        slap_ssf_t ssf,
-       const char *authid )
+       struct berval *authid )
 {
        unsigned long id;
        Connection *c;
 
        assert( connections != NULL );
 
+       assert( listener != NULL );
        assert( dnsname != NULL );
        assert( peername != NULL );
-       assert( sockname != NULL );
 
 #ifndef HAVE_TLS
-       assert( tls_udp_option != 1 );
+       assert( flags != CONN_IS_TLS );
 #endif
 
        if( s == AC_SOCKET_INVALID ) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, INFO, 
-                          "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
+                       "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY,
-                      "connection_init(%ld): invalid.\n",
-                      (long) s, 0, 0 );
+                       "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 #endif
                return -1;
        }
@@ -363,77 +407,89 @@ long connection_init(
 
 #else
        {
-               ber_socket_t    i;
-
+               ber_socket_t i;
                c = NULL;
 
-       for( i=0; i < dtblsize; i++) {
-               ber_socket_t    sd;
+               for( i=0; i < dtblsize; i++) {
+                       ber_socket_t    sd;
 
-           if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
-               assert( connections[i].c_sb == 0 );
-               c = &connections[i];
-               break;
-           }
+                       if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
+                               assert( connections[i].c_sb == 0 );
+                               c = &connections[i];
+                               break;
+                       }
 
                        sd = AC_SOCKET_INVALID;
-                       if (connections[i].c_sb != NULL)
-                       ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
-           
-           if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
-               assert( sd == AC_SOCKET_INVALID );
-               c = &connections[i];
-               break;
-           }
+                       if (connections[i].c_sb != NULL) {
+                               ber_sockbuf_ctrl( connections[i].c_sb,
+                                       LBER_SB_OPT_GET_FD, &sd );
+                       }
 
-           assert( connections[i].c_struct_state == SLAP_C_USED );
-           assert( connections[i].c_conn_state != SLAP_C_INVALID );
-           assert( sd != AC_SOCKET_INVALID );
-       }
+                       if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
+                               assert( sd == AC_SOCKET_INVALID );
+                               c = &connections[i];
+                               break;
+                       }
 
-       if( c == NULL ) {
+                       if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
+                               continue;
+                       }
+
+                       assert( connections[i].c_struct_state == SLAP_C_USED );
+                       assert( connections[i].c_conn_state != SLAP_C_INVALID );
+                       assert( sd != AC_SOCKET_INVALID );
+               }
+
+               if( c == NULL ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG( CONNECTION, INFO, 
-                          "connection_init: skt %d      connection table full (%d/%d)\n",
-                          s, i, dtblsize );
+                       LDAP_LOG( CONNECTION, INFO, 
+                               "connection_init(%d): connection table full "
+                               "(%d/%d)\n", s, i, dtblsize );
 #else
-               Debug( LDAP_DEBUG_ANY,
-                               "connection_init(%d): connection table full (%d/%d)\n",
-                               s, i, dtblsize);
+                       Debug( LDAP_DEBUG_ANY,
+                               "connection_init(%d): connection table full "
+                               "(%d/%d)\n", s, i, dtblsize);
 #endif
-           ldap_pvt_thread_mutex_unlock( &connections_mutex );
-           return -1;
+                       ldap_pvt_thread_mutex_unlock( &connections_mutex );
+                       return -1;
+               }
        }
-    }
 #endif
 
-    assert( c != NULL );
+       assert( c != NULL );
 
        if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
+               c->c_send_ldap_result = slap_send_ldap_result;
+               c->c_send_search_entry = slap_send_search_entry;
+               c->c_send_search_reference = slap_send_search_reference;
+               c->c_send_ldap_extended = slap_send_ldap_extended;
+#ifdef LDAP_RES_INTERMEDIATE
+               c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
+#endif
+
                c->c_authmech.bv_val = NULL;
                c->c_authmech.bv_len = 0;
                c->c_dn.bv_val = NULL;
                c->c_dn.bv_len = 0;
                c->c_ndn.bv_val = NULL;
                c->c_ndn.bv_len = 0;
-               c->c_groups = NULL;
 
-               c->c_listener_url.bv_val = NULL;
-               c->c_listener_url.bv_len = 0;
+               c->c_listener = NULL;
                c->c_peer_domain.bv_val = NULL;
                c->c_peer_domain.bv_len = 0;
                c->c_peer_name.bv_val = NULL;
                c->c_peer_name.bv_len = 0;
-               c->c_sock_name.bv_val = NULL;
-               c->c_sock_name.bv_len = 0;
 
                LDAP_STAILQ_INIT(&c->c_ops);
                LDAP_STAILQ_INIT(&c->c_pending_ops);
 
                c->c_sasl_bind_mech.bv_val = NULL;
                c->c_sasl_bind_mech.bv_len = 0;
-               c->c_sasl_context = NULL;
+               c->c_sasl_done = 0;
+               c->c_sasl_authctx = NULL;
+               c->c_sasl_sockctx = NULL;
                c->c_sasl_extra = NULL;
+               c->c_sasl_bindop = NULL;
 
                c->c_sb = ber_sockbuf_alloc( );
 
@@ -449,36 +505,54 @@ long connection_init(
                ldap_pvt_thread_mutex_init( &c->c_write_mutex );
                ldap_pvt_thread_cond_init( &c->c_write_cv );
 
+#ifdef LDAP_SLAPI
+               if ( slapi_plugins_used ) {
+                       slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
+               }
+#endif
+
                c->c_struct_state = SLAP_C_UNUSED;
        }
 
-    ldap_pvt_thread_mutex_lock( &c->c_mutex );
+       ldap_pvt_thread_mutex_lock( &c->c_mutex );
 
-    assert( c->c_struct_state == SLAP_C_UNUSED );
-    assert( c->c_authmech.bv_val == NULL );
-    assert( c->c_dn.bv_val == NULL );
-    assert( c->c_ndn.bv_val == NULL );
-    assert( c->c_groups == NULL );
-    assert( c->c_listener_url.bv_val == NULL );
-    assert( c->c_peer_domain.bv_val == NULL );
-    assert( c->c_peer_name.bv_val == NULL );
-    assert( c->c_sock_name.bv_val == NULL );
-    assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
-    assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
+       assert( c->c_struct_state == SLAP_C_UNUSED );
+       assert( c->c_authmech.bv_val == NULL );
+       assert( c->c_dn.bv_val == NULL );
+       assert( c->c_ndn.bv_val == NULL );
+       assert( c->c_listener == NULL );
+       assert( c->c_peer_domain.bv_val == NULL );
+       assert( c->c_peer_name.bv_val == NULL );
+       assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
+       assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
        assert( c->c_sasl_bind_mech.bv_val == NULL );
-       assert( c->c_sasl_context == NULL );
+       assert( c->c_sasl_done == 0 );
+       assert( c->c_sasl_authctx == NULL );
+       assert( c->c_sasl_sockctx == NULL );
        assert( c->c_sasl_extra == NULL );
+       assert( c->c_sasl_bindop == NULL );
        assert( c->c_currentber == NULL );
+       assert( c->c_writewaiter == 0);
+
+       c->c_listener = listener;
+
+       if ( flags == CONN_IS_CLIENT ) {
+               c->c_conn_state = SLAP_C_CLIENT;
+               c->c_struct_state = SLAP_C_USED;
+               ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &s );
+               ldap_pvt_thread_mutex_unlock( &c->c_mutex );
+               ldap_pvt_thread_mutex_unlock( &connections_mutex );
+
+               return 0;
+       }
 
-       ber_str2bv( url, 0, 1, &c->c_listener_url );
        ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
        ber_str2bv( peername, 0, 1, &c->c_peer_name );
-       ber_str2bv( sockname, 0, 1, &c->c_sock_name );
 
-    c->c_n_ops_received = 0;
-    c->c_n_ops_executing = 0;
-    c->c_n_ops_pending = 0;
-    c->c_n_ops_completed = 0;
+       c->c_n_ops_received = 0;
+       c->c_n_ops_executing = 0;
+       c->c_n_ops_pending = 0;
+       c->c_n_ops_completed = 0;
 
        c->c_n_get = 0;
        c->c_n_read = 0;
@@ -497,26 +571,25 @@ long connection_init(
 
 #ifdef LDAP_CONNECTIONLESS
        c->c_is_udp = 0;
-       if (tls_udp_option == 2)
-       {
+       if( flags == CONN_IS_UDP ) {
                c->c_is_udp = 1;
 #ifdef LDAP_DEBUG
-       ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
-               LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
+               ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
+                       LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 #endif
-       ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
-               LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
-       ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
-               LBER_SBIOD_LEVEL_PROVIDER, NULL );
+               ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
+                       LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
+               ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
+                       LBER_SBIOD_LEVEL_PROVIDER, NULL );
        } else
 #endif
        {
 #ifdef LDAP_DEBUG
-       ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
-               LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
+               ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
+                       LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 #endif
-       ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
-               LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
+               ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
+                       LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
        }
 
 #ifdef LDAP_DEBUG
@@ -529,8 +602,8 @@ long connection_init(
        {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, INFO, 
-                          "connection_init: conn %lu  set nonblocking failed\n",
-                          c->c_connid, 0, 0 );
+                       "connection_init: conn %lu set nonblocking failed\n",
+                       c->c_connid, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY,
                        "connection_init(%d, %s): set nonblocking failed\n",
@@ -538,33 +611,35 @@ long connection_init(
 #endif
        }
 
-    id = c->c_connid = conn_nextid++;
+       ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
+       id = c->c_connid = conn_nextid++;
+       ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 
-    c->c_conn_state = SLAP_C_INACTIVE;
-    c->c_struct_state = SLAP_C_USED;
+       c->c_conn_state = SLAP_C_INACTIVE;
+       c->c_struct_state = SLAP_C_USED;
 
        c->c_ssf = c->c_transport_ssf = ssf;
        c->c_tls_ssf = 0;
 
 #ifdef HAVE_TLS
-    if ( tls_udp_option == 1 ) {
-           c->c_is_tls = 1;
-           c->c_needs_tls_accept = 1;
-    } else {
-           c->c_is_tls = 0;
-           c->c_needs_tls_accept = 0;
-    }
+       if ( flags == CONN_IS_TLS ) {
+               c->c_is_tls = 1;
+               c->c_needs_tls_accept = 1;
+       } else {
+               c->c_is_tls = 0;
+               c->c_needs_tls_accept = 0;
+       }
 #endif
 
-       slap_sasl_open( c );
+       slap_sasl_open( c, 0 );
        slap_sasl_external( c, ssf, authid );
 
-    ldap_pvt_thread_mutex_unlock( &c->c_mutex );
-    ldap_pvt_thread_mutex_unlock( &connections_mutex );
+       ldap_pvt_thread_mutex_unlock( &c->c_mutex );
+       ldap_pvt_thread_mutex_unlock( &connections_mutex );
 
-    backend_connection_init(c);
+       backend_connection_init(c);
 
-    return id;
+       return id;
 }
 
 void connection2anonymous( Connection *c )
@@ -595,47 +670,34 @@ void connection2anonymous( Connection *c )
        c->c_ndn.bv_len = 0;
 
        c->c_authz_backend = NULL;
-       
-       {
-               GroupAssertion *g, *n;
-               for (g = c->c_groups; g; g=n) {
-                       n = g->ga_next;
-                       free(g);
-               }
-               c->c_groups = NULL;
-       }
 }
 
 static void
 connection_destroy( Connection *c )
 {
        /* note: connections_mutex should be locked by caller */
-    ber_socket_t       sd;
-    unsigned long      connid;
+       ber_socket_t    sd;
+       unsigned long   connid;
 
-    assert( connections != NULL );
-    assert( c != NULL );
-    assert( c->c_struct_state != SLAP_C_UNUSED );
-    assert( c->c_conn_state != SLAP_C_INVALID );
-    assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
+       assert( connections != NULL );
+       assert( c != NULL );
+       assert( c->c_struct_state != SLAP_C_UNUSED );
+       assert( c->c_conn_state != SLAP_C_INVALID );
+       assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
+       assert( c->c_writewaiter == 0);
 
-    /* only for stats (print -1 as "%lu" may give unexpected results ;) */
-    connid = c->c_connid;
+       /* only for stats (print -1 as "%lu" may give unexpected results ;) */
+       connid = c->c_connid;
 
-    backend_connection_destroy(c);
+       backend_connection_destroy(c);
 
-    c->c_protocol = 0;
-    c->c_connid = -1;
+       c->c_protocol = 0;
+       c->c_connid = -1;
 
-    c->c_activitytime = c->c_starttime = 0;
+       c->c_activitytime = c->c_starttime = 0;
 
        connection2anonymous( c );
-
-       if(c->c_listener_url.bv_val != NULL) {
-               free(c->c_listener_url.bv_val);
-               c->c_listener_url.bv_val = NULL;
-       }
-       c->c_listener_url.bv_len = 0;
+       c->c_listener = NULL;
 
        if(c->c_peer_domain.bv_val != NULL) {
                free(c->c_peer_domain.bv_val);
@@ -643,31 +705,10 @@ connection_destroy( Connection *c )
        }
        c->c_peer_domain.bv_len = 0;
        if(c->c_peer_name.bv_val != NULL) {
-#ifdef LDAP_PF_LOCAL
-               /*
-                * If peer was a domain socket, unlink. Mind you,
-                * they may be un-named. Should we leave this to
-                * the client?
-                */
-               if (strncmp(c->c_peer_name.bv_val, "PATH=", 
-                                       sizeof("PATH=") - 1) == 0) {
-                       char *path = c->c_peer_name.bv_val 
-                               + sizeof("PATH=") - 1;
-                       if (path[0] != '\0') {
-                               (void)unlink(path);
-                       }
-               }
-#endif /* LDAP_PF_LOCAL */
-
                free(c->c_peer_name.bv_val);
                c->c_peer_name.bv_val = NULL;
        }
        c->c_peer_name.bv_len = 0;
-       if(c->c_sock_name.bv_val != NULL) {
-               free(c->c_sock_name.bv_val);
-               c->c_sock_name.bv_val = NULL;
-       }
-       c->c_sock_name.bv_len = 0;
 
        c->c_sasl_bind_in_progress = 0;
        if(c->c_sasl_bind_mech.bv_val != NULL) {
@@ -685,11 +726,11 @@ connection_destroy( Connection *c )
 
        ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
        if ( sd != AC_SOCKET_INVALID ) {
-               slapd_remove( sd, 0 );
+               slapd_remove( sd, 1, 0 );
 
                Statslog( LDAP_DEBUG_STATS,
-                   "conn=%lu fd=%d closed\n",
-                       connid, sd, 0, 0, 0 );
+                       "conn=%lu fd=%ld closed\n",
+                       connid, (long) sd, 0, 0, 0 );
        }
 
        ber_sockbuf_free( c->c_sb );
@@ -701,8 +742,15 @@ connection_destroy( Connection *c )
                ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
        }
 
-    c->c_conn_state = SLAP_C_INVALID;
-    c->c_struct_state = SLAP_C_UNUSED;
+       c->c_conn_state = SLAP_C_INVALID;
+       c->c_struct_state = SLAP_C_UNUSED;
+
+#ifdef LDAP_SLAPI
+       /* call destructors, then constructors; avoids unnecessary allocation */
+       if ( slapi_plugins_used ) {
+               slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
+       }
+#endif
 }
 
 int connection_state_closing( Connection *c )
@@ -726,7 +774,7 @@ static void connection_abandon( Connection *c )
 
        Operation *o;
 
-       LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
+       LDAP_STAILQ_FOREACH( o, &c->c_ops, o_next ) {
                o->o_abandon = 1;
        }
 
@@ -753,8 +801,8 @@ void connection_closing( Connection *c )
                ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, DETAIL1, 
-                          "connection_closing: conn %lu readying socket %d for close.\n",
-                          c->c_connid, sd, 0 );
+                       "connection_closing: conn %lu readying socket %d for close.\n",
+                       c->c_connid, sd, 0 );
 #else
                Debug( LDAP_DEBUG_TRACE,
                        "connection_closing: readying conn=%lu sd=%d for close\n",
@@ -790,8 +838,8 @@ static void connection_close( Connection *c )
        if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, DETAIL1, 
-                          "connection_close: conn %lu  deferring sd %d\n",
-                          c->c_connid, sd, 0 );
+                       "connection_close: conn %lu deferring sd %d\n",
+                               c->c_connid, sd, 0 );
 #else
                Debug( LDAP_DEBUG_TRACE,
                        "connection_close: deferring conn=%lu sd=%d\n",
@@ -802,7 +850,7 @@ static void connection_close( Connection *c )
 
 #ifdef NEW_LOGGING
        LDAP_LOG( CONNECTION, RESULTS, 
-                  "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
+               "connection_close: conn %lu sd %d\n", c->c_connid, sd, 0 );
 #else
        Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
                c->c_connid, sd, 0 );
@@ -904,20 +952,56 @@ void connection_done( Connection *c )
 #endif /* !SLAPD_MONITOR */
 
 static void *
-connection_operation( void *arg_v )
+connection_operation( void *ctx, void *arg_v )
 {
-       int rc;
-       struct co_arg   *arg = arg_v;
-       ber_tag_t tag = arg->co_op->o_tag;
+       int rc = LDAP_OTHER;
+       Operation *op = arg_v;
+       SlapReply rs = {REP_RESULT};
+       ber_tag_t tag = op->o_tag;
 #ifdef SLAPD_MONITOR
        ber_tag_t oldtag = tag;
 #endif /* SLAPD_MONITOR */
-       Connection *conn = arg->co_conn;
+       Connection *conn = op->o_conn;
+       void *memctx = NULL;
+       void *memctx_null = NULL;
+       ber_len_t memsiz;
 
        ldap_pvt_thread_mutex_lock( &num_ops_mutex );
        num_ops_initiated++;
        ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 
+       op->o_threadctx = ctx;
+
+       switch ( tag ) {
+       case LDAP_REQ_BIND:
+       case LDAP_REQ_UNBIND:
+       case LDAP_REQ_ADD:
+       case LDAP_REQ_DELETE:
+       case LDAP_REQ_MODRDN:
+       case LDAP_REQ_MODIFY:
+       case LDAP_REQ_COMPARE:
+       case LDAP_REQ_SEARCH:
+       case LDAP_REQ_ABANDON:
+       case LDAP_REQ_EXTENDED:
+               break;
+       default:
+#ifdef NEW_LOGGING
+               LDAP_LOG( CONNECTION, INFO, "connection_operation: "
+                       "conn %lu unknown LDAP request 0x%lx\n",
+                       conn->c_connid, tag, 0 );
+#else
+               Debug( LDAP_DEBUG_ANY, "connection_operation: "
+                       "conn %lu unknown LDAP request 0x%lx\n",
+                       conn->c_connid, tag, 0 );
+#endif
+               op->o_tag = LBER_ERROR;
+               rs.sr_err = LDAP_PROTOCOL_ERROR;
+               rs.sr_text = "unknown LDAP request";
+               send_ldap_disconnect( op, &rs );
+               rc = SLAPD_DISCONNECT;
+               goto operations_error;
+       }
+
        if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR, 
@@ -928,86 +1012,93 @@ connection_operation( void *arg_v )
                        "error: SASL bind in progress (tag=%ld).\n",
                        (long) tag, 0, 0 );
 #endif
-               send_ldap_result( conn, arg->co_op,
-                       rc = LDAP_OPERATIONS_ERROR,
-                       NULL, "SASL bind in progress", NULL, NULL );
+               send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
+                       "SASL bind in progress" );
+               rc = LDAP_OPERATIONS_ERROR;
                goto operations_error;
        }
 
+       /* We can use Thread-Local storage for most mallocs. We can
+        * also use TL for ber parsing, but not on Add or Modify.
+        */
+#if 0
+       memsiz = ber_len( op->o_ber ) * 64;
+       if ( SLMALLOC_SLAB_SIZE > memsiz ) memsiz = SLMALLOC_SLAB_SIZE;
+#endif
+       memsiz = SLMALLOC_SLAB_SIZE;
+
+       memctx = sl_mem_create( memsiz, ctx );
+       op->o_tmpmemctx = memctx;
+       op->o_tmpmfuncs = &sl_mfuncs;
+       if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
+               /* Note - the ber and its buffer are already allocated from
+                * regular memory; this only affects subsequent mallocs that
+                * ber_scanf may invoke.
+                */
+               ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
+       }
+
        switch ( tag ) {
        case LDAP_REQ_BIND:
                INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
-               rc = do_bind( conn, arg->co_op );
+               rc = do_bind( op, &rs );
                break;
 
        case LDAP_REQ_UNBIND:
                INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
-               rc = do_unbind( conn, arg->co_op );
+               rc = do_unbind( op, &rs );
                break;
 
        case LDAP_REQ_ADD:
                INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
-               rc = do_add( conn, arg->co_op );
+               rc = do_add( op, &rs );
                break;
 
        case LDAP_REQ_DELETE:
                INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
-               rc = do_delete( conn, arg->co_op );
+               rc = do_delete( op, &rs );
                break;
 
        case LDAP_REQ_MODRDN:
                INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
-               rc = do_modrdn( conn, arg->co_op );
+               rc = do_modrdn( op, &rs );
                break;
 
        case LDAP_REQ_MODIFY:
                INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
-               rc = do_modify( conn, arg->co_op );
+               rc = do_modify( op, &rs );
                break;
 
        case LDAP_REQ_COMPARE:
                INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
-               rc = do_compare( conn, arg->co_op );
+               rc = do_compare( op, &rs );
                break;
 
        case LDAP_REQ_SEARCH:
                INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
-               rc = do_search( conn, arg->co_op );
+               rc = do_search( op, &rs );
                break;
 
        case LDAP_REQ_ABANDON:
                INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
-               rc = do_abandon( conn, arg->co_op );
+               rc = do_abandon( op, &rs );
                break;
 
        case LDAP_REQ_EXTENDED:
                INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
-               rc = do_extended( conn, arg->co_op );
+               rc = do_extended( op, &rs );
                break;
 
        default:
-#ifdef NEW_LOGGING
-               LDAP_LOG( CONNECTION, INFO, 
-                          "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
-                          conn->c_connid, tag, 0  );
-#else
-               Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
-                   tag, 0, 0 );
-#endif
-               arg->co_op->o_tag = LBER_ERROR;
-               send_ldap_disconnect( conn, arg->co_op,
-                       LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
-               rc = -1;
-               break;
+               /* not reachable */
+               assert( 0 );
        }
 
-#ifdef SLAPD_MONITOR
-       oldtag = tag;
-#endif /* SLAPD_MONITOR */
+operations_error:
        if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 
-operations_error:
        ldap_pvt_thread_mutex_lock( &num_ops_mutex );
+
        num_ops_completed++;
 #ifdef SLAPD_MONITOR
        switch (oldtag) {
@@ -1041,22 +1132,45 @@ operations_error:
        case LDAP_REQ_EXTENDED:
                num_ops_completed_[SLAP_OP_EXTENDED]++;
                break;
+       default:
+               /* this is reachable */
+               break;
        }
 #endif /* SLAPD_MONITOR */
        ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 
+       if ( op->o_cancel == SLAP_CANCEL_REQ ) {
+               op->o_cancel = LDAP_TOO_LATE;
+       }
+       while ( op->o_cancel != SLAP_CANCEL_NONE &&
+               op->o_cancel != SLAP_CANCEL_DONE )
+       {
+               ldap_pvt_thread_yield();
+       }
+
        ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 
-       conn->c_n_ops_executing--;
-       conn->c_n_ops_completed++;
+       ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
+
+       if ( op->o_cancel != SLAP_CANCEL_ACK &&
+               ( op->o_sync_mode & SLAP_SYNC_PERSIST ) )
+       {
+               sl_mem_detach( ctx, memctx );
+
+       } else if ( op->o_sync_slog_size != -1 ) {
+               sl_mem_detach( ctx, memctx );
+               LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
+               LDAP_STAILQ_NEXT(op, o_next) = NULL;
+               conn->c_n_ops_executing--;
+               conn->c_n_ops_completed++;
 
-       LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
-       LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
-       slap_op_free( arg->co_op );
-       arg->co_op = NULL;
-       arg->co_conn = NULL;
-       free( (char *) arg );
-       arg = NULL;
+       } else {
+               LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
+               LDAP_STAILQ_NEXT(op, o_next) = NULL;
+               slap_op_free( op );
+               conn->c_n_ops_executing--;
+               conn->c_n_ops_completed++;
+       }
 
        switch( tag ) {
        case LBER_ERROR:
@@ -1064,23 +1178,59 @@ operations_error:
                /* c_mutex is locked */
                connection_closing( conn );
                break;
-
-       case LDAP_REQ_BIND:
-               conn->c_sasl_bind_in_progress =
-                       rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
-
-               if( conn->c_conn_state == SLAP_C_BINDING) {
-                       conn->c_conn_state = SLAP_C_ACTIVE;
-               }
        }
 
        connection_resched( conn );
-
        ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
-
        return NULL;
 }
 
+static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
+
+int connection_client_setup(
+       ber_socket_t s,
+       ldap_pvt_thread_start_t *func,
+       void *arg )
+{
+       int rc;
+       Connection *c;
+
+       rc = connection_init( s, (Listener *)&dummy_list, "", "",
+               CONN_IS_CLIENT, 0, NULL );
+       if ( rc < 0 ) return -1;
+
+       c = connection_get( s );
+       c->c_clientfunc = func;
+       c->c_clientarg = arg;
+       connection_return( c );
+       slapd_add_internal( s, 0 );
+       slapd_set_read( s, 1 );
+       return 0;
+}
+
+void connection_client_enable(
+       ber_socket_t s )
+{
+       slapd_set_read( s, 1 );
+}
+
+void connection_client_stop(
+       ber_socket_t s )
+{
+       Connection *c;
+
+       /* get (locked) connection */
+       c = connection_get( s );
+       
+       assert( c->c_conn_state == SLAP_C_CLIENT );
+
+       c->c_listener = NULL;
+       c->c_conn_state = SLAP_C_INVALID;
+       c->c_struct_state = SLAP_C_UNUSED;
+       connection_return( c );
+       slapd_remove( s, 0, 1 );
+}
+
 int connection_read(ber_socket_t s)
 {
        int rc = 0;
@@ -1102,7 +1252,7 @@ int connection_read(ber_socket_t s)
                        "connection_read(%ld): no connection!\n",
                        (long) s, 0, 0 );
 #endif
-               slapd_remove(s, 0);
+               slapd_remove(s, 1, 0);
 
                ldap_pvt_thread_mutex_unlock( &connections_mutex );
                return -1;
@@ -1125,10 +1275,19 @@ int connection_read(ber_socket_t s)
                return 0;
        }
 
+       if ( c->c_conn_state == SLAP_C_CLIENT ) {
+               slapd_clr_read( s, 0 );
+               ldap_pvt_thread_pool_submit( &connection_pool,
+                       c->c_clientfunc, c->c_clientarg );
+               connection_return( c );
+               ldap_pvt_thread_mutex_unlock( &connections_mutex );
+               return 0;
+       }
+
 #ifdef NEW_LOGGING
        LDAP_LOG( CONNECTION, DETAIL1, 
-                  "connection_read: conn %lu  checking for input.\n", 
-                  c->c_connid, 0, 0  );
+               "connection_read: conn %lu checking for input.\n", 
+                       c->c_connid, 0, 0 );
 #else
        Debug( LDAP_DEBUG_TRACE,
                "connection_read(%d): checking for input on id=%lu\n",
@@ -1137,7 +1296,7 @@ int connection_read(ber_socket_t s)
 
 #ifdef HAVE_TLS
        if ( c->c_is_tls && c->c_needs_tls_accept ) {
-               rc = ldap_pvt_tls_accept( c->c_sb, NULL );
+               rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
                if ( rc < 0 ) {
 #if 0 /* required by next #if 0 */
                        struct timeval tv;
@@ -1146,8 +1305,8 @@ int connection_read(ber_socket_t s)
 
 #ifdef NEW_LOGGING
                        LDAP_LOG( CONNECTION, ERR, 
-                                  "connection_read: conn %lu  TLS accept error, error %d\n",
-                                  c->c_connid, rc, 0 );
+                               "connection_read: conn %lu TLS accept error, error %d\n",
+                               c->c_connid, rc, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE,
                                "connection_read(%d): TLS accept error "
@@ -1164,10 +1323,10 @@ int connection_read(ber_socket_t s)
                        FD_ZERO(&rfd);
                        FD_SET(s, &rfd);
                        for (rc=1; rc>0;) {
-                           tv.tv_sec = 1;
-                           tv.tv_usec = 0;
-                           rc = select(s+1, &rfd, NULL, NULL, &tv);
-                           if (rc == 1) {
+                               tv.tv_sec = 1;
+                               tv.tv_usec = 0;
+                               rc = select(s+1, &rfd, NULL, NULL, &tv);
+                               if (rc == 1) {
                                        ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
                                }
                        }
@@ -1176,7 +1335,7 @@ int connection_read(ber_socket_t s)
 
                } else if ( rc == 0 ) {
                        void *ssl;
-                       struct berval authid = { 0, NULL };
+                       struct berval authid = BER_BVNULL;
 
                        c->c_needs_tls_accept = 0;
 
@@ -1191,18 +1350,17 @@ int connection_read(ber_socket_t s)
                        rc = dnX509peerNormalize( ssl, &authid );
                        if ( rc != LDAP_SUCCESS ) {
 #ifdef NEW_LOGGING
-                               LDAP_LOG( CONNECTION, INFO, 
-                                       "connection_read: conn %lu unable to get TLS client DN, "
-                                       "error %d\n", c->c_connid, rc, 0 );
+                               LDAP_LOG( CONNECTION, INFO, "connection_read: "
+                                       "conn %lu unable to get TLS client DN, error %d\n",
+                                       c->c_connid, rc, 0 );
 #else
-                               Debug( LDAP_DEBUG_TRACE,
-                               "connection_read(%d): unable to get TLS client DN "
-                               "error=%d id=%lu\n",
-                               s, rc, c->c_connid );
+                               Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
+                                       "unable to get TLS client DN, error=%d id=%lu\n",
+                                       s, rc, c->c_connid );
 #endif
                        }
-                       slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
-                       if ( authid.bv_val )    free( authid.bv_val );
+                       slap_sasl_external( c, c->c_tls_ssf, &authid );
+                       if ( authid.bv_val ) free( authid.bv_val );
                }
 
                /* if success and data is ready, fall thru to data input loop */
@@ -1218,9 +1376,16 @@ int connection_read(ber_socket_t s)
 
 #ifdef HAVE_CYRUS_SASL
        if ( c->c_sasl_layers ) {
+               /* If previous layer is not removed yet, give up for now */
+               if ( !c->c_sasl_sockctx ) {
+                       connection_return( c );
+                       ldap_pvt_thread_mutex_unlock( &connections_mutex );
+                       return 0;
+               }
+
                c->c_sasl_layers = 0;
 
-               rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
+               rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
 
                if( rc != LDAP_SUCCESS ) {
 #ifdef NEW_LOGGING
@@ -1244,21 +1409,24 @@ int connection_read(ber_socket_t s)
 #endif
 
 #define CONNECTION_INPUT_LOOP 1
+/* #define     DATA_READY_LOOP 1 */
 
-#ifdef DATA_READY_LOOP
-       while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
-#elif CONNECTION_INPUT_LOOP
-       while(!rc)
-#endif
-       {
+       do {
                /* How do we do this without getting into a busy loop ? */
                rc = connection_input( c );
        }
+#ifdef DATA_READY_LOOP
+       while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
+#elif CONNECTION_INPUT_LOOP
+       while(!rc);
+#else
+       while(0);
+#endif
 
        if( rc < 0 ) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR, 
-                       "connection_read: conn %lu  input error %d, closing.\n",
+                       "connection_read: conn %lu input error %d, closing.\n",
                        c->c_connid, rc, 0 );
 #else
                Debug( LDAP_DEBUG_TRACE,
@@ -1288,24 +1456,26 @@ int connection_read(ber_socket_t s)
 
 static int
 connection_input(
-    Connection *conn
-)
+       Connection *conn )
 {
        Operation *op;
        ber_tag_t       tag;
        ber_len_t       len;
        ber_int_t       msgid;
        BerElement      *ber;
+       int             rc;
 #ifdef LDAP_CONNECTIONLESS
        Sockaddr        peeraddr;
        char            *cdn = NULL;
 #endif
+       char *defer = NULL;
 
-       if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
-           == NULL ) {
+       if ( conn->c_currentber == NULL &&
+               ( conn->c_currentber = ber_alloc()) == NULL )
+       {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR, 
-                       "connection_input: conn %lu  ber_alloc failed.\n", 
+                       "connection_input: conn %lu ber_alloc failed.\n", 
                        conn->c_connid, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
@@ -1316,8 +1486,7 @@ connection_input(
        errno = 0;
 
 #ifdef LDAP_CONNECTIONLESS
-       if (conn->c_is_udp)
-       {
+       if ( conn->c_is_udp ) {
                char    peername[sizeof("IP=255.255.255.255:65336")];
                len = ber_int_sb_read(conn->c_sb, &peeraddr,
                        sizeof(struct sockaddr));
@@ -1340,7 +1509,7 @@ connection_input(
 
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR, 
-                       "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
+                       "connection_input: conn %lu ber_get_next failed, errno %d (%s).\n",
                        conn->c_connid, err, sock_errstr(err) );
 #else
                Debug( LDAP_DEBUG_TRACE,
@@ -1364,11 +1533,11 @@ connection_input(
                /* log, close and send error */
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR, 
-                       "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
+                       "connection_input: conn %lu ber_get_int returns 0x%lx.\n",
                        conn->c_connid, tag, 0 );
 #else
-               Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
-                   0 );
+               Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n",
+                       tag, 0, 0 );
 #endif
                ber_free( ber, 1 );
                return -1;
@@ -1378,11 +1547,11 @@ connection_input(
                /* log, close and send error */
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR, 
-                          "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
-                          conn->c_connid, tag, 0 );
+                       "connection_input: conn %lu ber_peek_tag returns 0x%lx.\n",
+                       conn->c_connid, tag, 0 );
 #else
-               Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
-                   0 );
+               Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n",
+                       tag, 0, 0 );
 #endif
                ber_free( ber, 1 );
 
@@ -1390,22 +1559,21 @@ connection_input(
        }
 
 #ifdef LDAP_CONNECTIONLESS
-       if (conn->c_is_udp) {
-               if (tag == LBER_OCTETSTRING) {
+       if( conn->c_is_udp ) {
+               if( tag == LBER_OCTETSTRING ) {
                        ber_get_stringa( ber, &cdn );
                        tag = ber_peek_tag(ber, &len);
                }
-               if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
+               if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
 #ifdef NEW_LOGGING
-                   LDAP_LOG( CONNECTION, ERR, 
-                              "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
-                              conn->c_connid, tag, 0 );
+                       LDAP_LOG( CONNECTION, ERR, 
+                               "connection_input: conn %lu invalid req for UDP 0x%lx.\n",
+                               conn->c_connid, tag, 0 );
 #else
-                   Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
-                       0 );
+                       Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
 #endif
-                   ber_free( ber, 1 );
-                   return 0;
+                       ber_free( ber, 1 );
+                       return 0;
                }
        }
 #endif
@@ -1416,33 +1584,103 @@ connection_input(
 
        op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
 
-       op->vrFilter = NULL;
-
+       op->o_conn = conn;
+       op->o_assertion = NULL;
+       op->o_preread_attrs = NULL;
+       op->o_postread_attrs = NULL;
+       op->o_vrFilter = NULL;
+       /* clear state if the connection is being reused from inactive */
+       if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
+               memset( &conn->c_pagedresults_state, 0, sizeof( conn->c_pagedresults_state ) );
+       }
        op->o_pagedresults_state = conn->c_pagedresults_state;
 
+       op->o_res_ber = NULL;
+
 #ifdef LDAP_CONNECTIONLESS
-       op->o_peeraddr = peeraddr;
-       if (cdn) {
-           ber_str2bv( cdn, 0, 1, &op->o_dn );
-           op->o_protocol = LDAP_VERSION2;
-       }
+       if (conn->c_is_udp) {
+               if ( cdn ) {
+                       ber_str2bv( cdn, 0, 1, &op->o_dn );
+                       op->o_protocol = LDAP_VERSION2;
+               }
+               op->o_res_ber = ber_alloc_t( LBER_USE_DER );
+               if (op->o_res_ber == NULL) return 1;
+
+               rc = ber_write( op->o_res_ber, (char *)&peeraddr,
+                       sizeof(struct sockaddr), 0 );
+
+               if (rc != sizeof(struct sockaddr)) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG( CONNECTION, INFO, 
+                               "connection_input: conn %lu ber_write failed\n",
+                               conn->c_connid, 0, 0 );
+#else
+                       Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
 #endif
-       if ( conn->c_conn_state == SLAP_C_BINDING
-               || conn->c_conn_state == SLAP_C_CLOSING )
-       {
+                       return 1;
+               }
+
+               if (op->o_protocol == LDAP_VERSION2) {
+                       rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
+                       if (rc == -1) {
+#ifdef NEW_LOGGING
+                               LDAP_LOG( CONNECTION, INFO, 
+                                       "connection_input: conn %lu put outer sequence failed\n",
+                                       conn->c_connid, 0, 0 );
+#else
+                               Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
+#endif
+                               return rc;
+                       }
+               }
+       }
+#endif /* LDAP_CONNECTIONLESS */
+
+       rc = 0;
+
+       /* Don't process requests when the conn is in the middle of a
+        * Bind, or if it's closing. Also, don't let any single conn
+        * use up all the available threads, and don't execute if we're
+        * currently blocked on output. And don't execute if there are
+        * already pending ops, let them go first.  Abandon operations
+        * get exceptions to some, but not all, cases.
+        */
+       if (tag != LDAP_REQ_ABANDON && conn->c_conn_state == SLAP_C_CLOSING) {
+               defer = "closing";
+       } else if (tag != LDAP_REQ_ABANDON && conn->c_writewaiter) {
+               defer = "awaiting write";
+       } else if (conn->c_n_ops_executing >= connection_pool_max/2) {
+               defer = "too many executing";
+       } else if (conn->c_conn_state == SLAP_C_BINDING) {
+               defer = "binding";
+       } else if (tag != LDAP_REQ_ABANDON && conn->c_n_ops_pending) {
+               defer = "pending operations";
+       }
+
+       if( defer ) {
+               int max = conn->c_dn.bv_len
+                       ? slap_conn_max_pending_auth
+                       : slap_conn_max_pending;
+
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, INFO, 
-                       "connection_input: conn %lu  deferring operation\n",
-                       conn->c_connid, 0, 0 );
+                       "connection_input: conn %lu deferring operation: %s\n",
+                       conn->c_connid, defer, 0 );
 #else
-               Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
+               Debug( LDAP_DEBUG_ANY,
+                       "connection_input: conn=%lu deferring operation: %s\n",
+                       conn->c_connid, defer, 0 );
 #endif
                conn->c_n_ops_pending++;
                LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
-
+               if ( conn->c_n_ops_pending > max ) {
+                       rc = -1;
+               } else {
+                       rc = 1;
+               }
        } else {
                conn->c_n_ops_executing++;
-               connection_op_activate( conn, op );
+               connection_op_activate( op );
        }
 
 #ifdef NO_THREADS
@@ -1453,7 +1691,7 @@ connection_input(
 #endif
        assert( conn->c_struct_state == SLAP_C_USED );
 
-       return 0;
+       return rc;
 }
 
 static int
@@ -1472,7 +1710,7 @@ connection_resched( Connection *conn )
                if( rc ) {
 #ifdef NEW_LOGGING
                        LDAP_LOG( CONNECTION, DETAIL1, 
-                               "connection_resched: conn %lu  reaquiring locks.\n",
+                               "connection_resched: conn %lu reaquiring locks.\n",
                                conn->c_connid, 0, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE,
@@ -1492,7 +1730,7 @@ connection_resched( Connection *conn )
                if( conn->c_conn_state != SLAP_C_CLOSING ) {
 #ifdef NEW_LOGGING
                        LDAP_LOG( CONNECTION, INFO, 
-                               "connection_resched: conn %lu  closed by other thread.\n",
+                               "connection_resched: conn %lu closed by other thread.\n",
                                conn->c_connid, 0, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE, "connection_resched: "
@@ -1502,7 +1740,7 @@ connection_resched( Connection *conn )
                } else {
 #ifdef NEW_LOGGING
                        LDAP_LOG( CONNECTION, DETAIL1, 
-                               "connection_resched: conn %lu  attempting closing.\n",
+                               "connection_resched: conn %lu attempting closing.\n",
                                conn->c_connid, 0, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE, "connection_resched: "
@@ -1516,12 +1754,15 @@ connection_resched( Connection *conn )
                return 0;
        }
 
-       if( conn->c_conn_state != SLAP_C_ACTIVE ) {
+       if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
                /* other states need different handling */
                return 0;
        }
 
        while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
+               if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
+                       break;
+               }
                LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
                LDAP_STAILQ_NEXT(op, o_next) = NULL;
                /* pending operations should not be marked for abandonment */
@@ -1530,7 +1771,7 @@ connection_resched( Connection *conn )
                conn->c_n_ops_pending--;
                conn->c_n_ops_executing++;
 
-               connection_op_activate( conn, op );
+               connection_op_activate( op );
 
                if ( conn->c_conn_state == SLAP_C_BINDING ) {
                        break;
@@ -1539,49 +1780,66 @@ connection_resched( Connection *conn )
        return 0;
 }
 
-static int connection_op_activate( Connection *conn, Operation *op )
+static int connection_bind_cb( Operation *op, SlapReply *rs )
+{
+       slap_callback *cb = op->o_callback;
+       op->o_callback = cb->sc_next;
+
+       ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+       op->o_conn->c_conn_state = SLAP_C_ACTIVE;
+       ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
+
+       ch_free( cb );
+       return SLAP_CB_CONTINUE;
+}
+
+static int connection_op_activate( Operation *op )
 {
-       struct co_arg *arg;
        int status;
        ber_tag_t tag = op->o_tag;
 
        if(tag == LDAP_REQ_BIND) {
-               conn->c_conn_state = SLAP_C_BINDING;
+               slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
+               sc->sc_response = connection_bind_cb;
+               sc->sc_next = op->o_callback;
+               op->o_callback = sc;
+               op->o_conn->c_conn_state = SLAP_C_BINDING;
        }
 
-       arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
-       arg->co_conn = conn;
-       arg->co_op = op;
-
-       if (!arg->co_op->o_dn.bv_len) {
-           arg->co_op->o_authz = conn->c_authz;
-           arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
-               conn->c_dn.bv_val : "" );
-           arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
-               conn->c_ndn.bv_val : "" );
+       if (!op->o_dn.bv_len) {
+               op->o_authz = op->o_conn->c_authz;
+               ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
+               ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
        }
-       arg->co_op->o_authtype = conn->c_authtype;
-       ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
+       op->o_authtype = op->o_conn->c_authtype;
+       ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
        
-       if (!arg->co_op->o_protocol) {
-           arg->co_op->o_protocol = conn->c_protocol
-               ? conn->c_protocol : LDAP_VERSION3;
+       if (!op->o_protocol) {
+               op->o_protocol = op->o_conn->c_protocol
+                       ? op->o_conn->c_protocol : LDAP_VERSION3;
+       }
+       if (op->o_conn->c_conn_state == SLAP_C_INACTIVE
+               && op->o_protocol > LDAP_VERSION2)
+       {
+               op->o_conn->c_conn_state = SLAP_C_ACTIVE;
        }
-       arg->co_op->o_connid = conn->c_connid;
 
-       LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
+       op->o_connid = op->o_conn->c_connid;
+
+       LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
 
        status = ldap_pvt_thread_pool_submit( &connection_pool,
-               connection_operation, (void *) arg );
+               connection_operation, (void *) op );
 
        if ( status != 0 ) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR, 
                        "connection_op_activate: conn %lu        thread pool submit failed.\n",
-                       conn->c_connid, 0, 0 );
+                       op->o_connid, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY,
-               "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
+                       "ldap_pvt_thread_pool_submit: failed (%d) for conn=%lu\n",
+                       status, op->o_connid, 0 );
 #endif
                /* should move op to pending list */
        }
@@ -1604,13 +1862,13 @@ int connection_write(ber_socket_t s)
        if( c == NULL ) {
 #ifdef NEW_LOGGING
                LDAP_LOG( CONNECTION, ERR, 
-                       "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
+                       "connection_write: sock %ld no connection!\n", (long)s, 0, 0);
 #else
                Debug( LDAP_DEBUG_ANY,
                        "connection_write(%ld): no connection!\n",
-                       (long) s, 0, 0 );
+                       (long)s, 0, 0 );
 #endif
-               slapd_remove(s, 0);
+               slapd_remove(s, 1, 0);
                ldap_pvt_thread_mutex_unlock( &connections_mutex );
                return -1;
        }
@@ -1619,7 +1877,7 @@ int connection_write(ber_socket_t s)
 
 #ifdef NEW_LOGGING
        LDAP_LOG( CONNECTION, DETAIL1, 
-               "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
+               "connection_write conn %lu waking output.\n", c->c_connid, 0, 0 );
 #else
        Debug( LDAP_DEBUG_TRACE,
                "connection_write(%d): waking output for id=%lu\n",
@@ -1627,12 +1885,47 @@ int connection_write(ber_socket_t s)
 #endif
        ldap_pvt_thread_cond_signal( &c->c_write_cv );
 
-       if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
+       if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
                slapd_set_read( s, 1 );
-       if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
+       }
+       if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
                slapd_set_write( s, 1 );
+       }
        connection_return( c );
        ldap_pvt_thread_mutex_unlock( &connections_mutex );
        return 0;
 }
 
+void
+connection_fake_init(
+       Connection *conn,
+       Operation *op,
+       void *ctx )
+{
+       conn->c_connid = -1;
+       conn->c_send_ldap_result = slap_send_ldap_result;
+       conn->c_send_search_entry = slap_send_search_entry;
+       conn->c_send_search_reference = slap_send_search_reference;
+       conn->c_listener = (Listener *)&dummy_list;
+       conn->c_peer_domain = slap_empty_bv;
+       conn->c_peer_name = slap_empty_bv;
+
+       /* set memory context */
+       op->o_tmpmemctx = sl_mem_create( SLMALLOC_SLAB_SIZE, ctx );
+       op->o_tmpmfuncs = &sl_mfuncs;
+       op->o_threadctx = ctx;
+
+       op->o_conn = conn;
+       op->o_connid = op->o_conn->c_connid;
+
+       op->o_time = slap_get_time();
+}
+
+void
+connection_assign_nextid( Connection *conn )
+{
+       ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
+       conn->c_connid = conn_nextid++;
+       ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
+}
+