]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/connection.c
rework objectClass mucking to use syntax "pretty" routine
[openldap] / servers / slapd / connection.c
index 4d8fa9b3fb80fad30047b634df92b43f9a071a61..436a76c5d2cb33948a84b3fceb1107b70aa20d9a 100644 (file)
@@ -1,6 +1,6 @@
 /* $OpenLDAP$ */
 /*
- * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
  */
 
@@ -11,9 +11,9 @@
 
 #include <ac/socket.h>
 #include <ac/errno.h>
-#include <ac/signal.h>
 #include <ac/string.h>
 #include <ac/time.h>
+#include <ac/unistd.h>
 
 #include "ldap_pvt.h"
 #include "lutil.h"
@@ -55,15 +55,12 @@ 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.
@@ -74,8 +71,8 @@ int connections_init(void)
 
        if( connections != NULL) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connections_init:  already initialized.\n" ));
+               LDAP_LOG( CONNECTION, INFO,
+                          "connections_init:  already initialized.\n", 0, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
                        0, 0, 0 );
@@ -86,13 +83,13 @@ int connections_init(void)
        /* should check return of every call */
        ldap_pvt_thread_mutex_init( &connections_mutex );
 
-       connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
+       connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 
        if( connections == NULL ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
-                          "connections_init: allocation (%d * %ld) of connection array failed\n",
-                          dtblsize, (long) sizeof(Connection) ));
+               LDAP_LOG( CONNECTION, ERR,
+                          "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",
@@ -123,8 +120,8 @@ int connections_destroy(void)
 
        if( connections == NULL) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connections_destroy: nothing to destroy.\n"));
+               LDAP_LOG( CONNECTION, INFO,
+                          "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
                        0, 0, 0 );
@@ -208,8 +205,7 @@ static Connection* connection_get( ber_socket_t s )
        Connection *c;
 
 #ifdef NEW_LOGGING
-       LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
-                  "connection_get: socket %ld\n", (long)s ));
+       LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 #else
        Debug( LDAP_DEBUG_ARGS,
                "connection_get(%ld)\n",
@@ -233,15 +229,15 @@ static Connection* connection_get( ber_socket_t s )
                ber_socket_t i, sd;
 
                for(i=0; i<dtblsize; i++) {
-                       ber_sockbuf_ctrl( connections[i].c_sb,
-                               LBER_SB_OPT_GET_FD, &sd );
-
                        if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
                                assert( connections[i].c_conn_state == SLAP_C_INVALID );
                                assert( connections[i].c_sb == 0 );
                                break;
                        }
 
+                       ber_sockbuf_ctrl( connections[i].c_sb,
+                               LBER_SB_OPT_GET_FD, &sd );
+
                        if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
                                assert( connections[i].c_conn_state == SLAP_C_INVALID );
                                assert( sd == AC_SOCKET_INVALID );
@@ -273,8 +269,8 @@ static Connection* connection_get( ber_socket_t s )
                        assert( sd == AC_SOCKET_INVALID );
 
 #ifdef NEW_LOGGING
-                       LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
-                                  "connection_get:  connection %d not used\n", s ));
+                       LDAP_LOG( CONNECTION, ARGS, 
+                               "connection_get:  connection %d not used\n", s, 0, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE,
                                "connection_get(%d): connection not used\n",
@@ -286,11 +282,11 @@ static Connection* connection_get( ber_socket_t s )
                }
 
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
-                          "connection_get: get for %d got connid %ld\n",s, c->c_connid ));
+               LDAP_LOG( CONNECTION, RESULTS, 
+                       "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 #else
                Debug( LDAP_DEBUG_TRACE,
-                       "connection_get(%d): got connid=%ld\n",
+                       "connection_get(%d): got connid=%lu\n",
                        s, c->c_connid, 0 );
 #endif
 
@@ -319,10 +315,9 @@ 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,
        slap_ssf_t ssf,
        const char *authid )
@@ -332,9 +327,9 @@ long connection_init(
 
        assert( connections != NULL );
 
+       assert( listener != NULL );
        assert( dnsname != NULL );
        assert( peername != NULL );
-       assert( sockname != NULL );
 
 #ifndef HAVE_TLS
        assert( tls_udp_option != 1 );
@@ -342,8 +337,8 @@ long connection_init(
 
        if( s == AC_SOCKET_INVALID ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connection_init: init of socket %ld invalid.\n", (long)s ));
+               LDAP_LOG( CONNECTION, INFO, 
+                          "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY,
                       "connection_init(%ld): invalid.\n",
@@ -364,7 +359,7 @@ long connection_init(
 
 #else
        {
-               unsigned int i;
+               ber_socket_t    i;
 
                c = NULL;
 
@@ -394,39 +389,53 @@ long connection_init(
 
        if( c == NULL ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connection_init: skt %d      connection table full (%d/%d)\n",
-                          s, i, dtblsize ));
+               LDAP_LOG( CONNECTION, INFO, 
+                          "connection_init: skt %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);
+                               "connection_init(%d): connection table full "
+                               "(%d/%d)\n", s, i, dtblsize);
 #endif
            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_authmech = NULL;
-               c->c_dn = NULL;
-               c->c_cdn = NULL;
+               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_RESP
+               c->c_send_ldap_intermediate_resp = slap_send_ldap_intermediate_resp;
+#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 = NULL;
-               c->c_peer_domain = NULL;
-               c->c_peer_name = NULL;
-               c->c_sock_name = NULL;
+               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_ops = NULL;
-               c->c_pending_ops = NULL;
+               LDAP_STAILQ_INIT(&c->c_ops);
+               LDAP_STAILQ_INIT(&c->c_pending_ops);
 
-               c->c_sasl_bind_mech = NULL;
+               c->c_sasl_bind_mech.bv_val = NULL;
+               c->c_sasl_bind_mech.bv_len = 0;
                c->c_sasl_context = NULL;
                c->c_sasl_extra = NULL;
+               c->c_sasl_bindop = NULL;
 
                c->c_sb = ber_sockbuf_alloc( );
 
@@ -448,25 +457,24 @@ long connection_init(
     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 
     assert( c->c_struct_state == SLAP_C_UNUSED );
-       assert( c->c_authmech == NULL );
-    assert(    c->c_dn == NULL );
-    assert(    c->c_cdn == NULL );
+    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 == NULL );
-    assert( c->c_peer_domain == NULL );
-    assert( c->c_peer_name == NULL );
-    assert( c->c_sock_name == NULL );
-    assert( c->c_ops == NULL );
-    assert( c->c_pending_ops == NULL );
-       assert( c->c_sasl_bind_mech == 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_extra == NULL );
+       assert( c->c_sasl_bindop == NULL );
        assert( c->c_currentber == NULL );
 
-       c->c_listener_url = ch_strdup( url  );
-       c->c_peer_domain = ch_strdup( dnsname  );
-    c->c_peer_name = ch_strdup( peername  );
-    c->c_sock_name = ch_strdup( sockname );
+       c->c_listener = listener;
+       ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
+       ber_str2bv( peername, 0, 1, &c->c_peer_name );
 
     c->c_n_ops_received = 0;
     c->c_n_ops_executing = 0;
@@ -490,27 +498,26 @@ long connection_init(
 
 #ifdef LDAP_CONNECTIONLESS
        c->c_is_udp = 0;
-       if (tls_udp_option == 2)
-       {
+       if( tls_udp_option == 2 ) {
                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_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 );
        }
-       ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
-               LBER_SBIOD_LEVEL_PROVIDER, NULL );
 
 #ifdef LDAP_DEBUG
        ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
@@ -521,13 +528,13 @@ long connection_init(
                c /* non-NULL */ ) < 0 )
        {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connection_init: conn %d  set nonblocking failed\n",
-                          c->c_connid ));
+               LDAP_LOG( CONNECTION, INFO, 
+                          "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",
-                       s, c->c_peer_name, 0 );
+                       s, c->c_peer_name.bv_val, 0 );
 #endif
        }
 
@@ -562,42 +569,41 @@ long connection_init(
 
 void connection2anonymous( Connection *c )
 {
-    assert( connections != NULL );
-    assert( c != NULL );
+       assert( connections != NULL );
+       assert( c != NULL );
 
        {
                ber_len_t max = sockbuf_max_incoming;
                ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
        }
 
-       if(c->c_authmech != NULL ) {
-               free(c->c_authmech);
-               c->c_authmech = NULL;
+       if(c->c_authmech.bv_val != NULL ) {
+               free(c->c_authmech.bv_val);
+               c->c_authmech.bv_val = NULL;
        }
+       c->c_authmech.bv_len = 0;
 
-    if(c->c_dn != NULL) {
-       free(c->c_dn);
-       c->c_dn = NULL;
-    }
-
-       if(c->c_cdn != NULL) {
-               free(c->c_cdn);
-               c->c_cdn = NULL;
+       if(c->c_dn.bv_val != NULL) {
+               free(c->c_dn.bv_val);
+               c->c_dn.bv_val = NULL;
+       }
+       c->c_dn.bv_len = 0;
+       if(c->c_ndn.bv_val != NULL) {
+               free(c->c_ndn.bv_val);
+               c->c_ndn.bv_val = NULL;
        }
+       c->c_ndn.bv_len = 0;
 
-       c->c_authc_backend = NULL;
        c->c_authz_backend = NULL;
-    
-    {
-       GroupAssertion *g, *n;
-       for (g = c->c_groups; g; g=n)
+       
        {
-           n = g->next;
-           free(g);
+               GroupAssertion *g, *n;
+               for (g = c->c_groups; g; g=n) {
+                       n = g->ga_next;
+                       free(g);
+               }
+               c->c_groups = NULL;
        }
-       c->c_groups = NULL;
-    }
-
 }
 
 static void
@@ -605,12 +611,16 @@ connection_destroy( Connection *c )
 {
        /* note: connections_mutex should be locked by caller */
     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( c->c_ops == NULL );
+    assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
+
+    /* only for stats (print -1 as "%lu" may give unexpected results ;) */
+    connid = c->c_connid;
 
     backend_connection_destroy(c);
 
@@ -620,44 +630,25 @@ connection_destroy( Connection *c )
     c->c_activitytime = c->c_starttime = 0;
 
        connection2anonymous( c );
+       c->c_listener = NULL;
 
-       if(c->c_listener_url != NULL) {
-               free(c->c_listener_url);
-               c->c_listener_url = NULL;
-       }
-
-       if(c->c_peer_domain != NULL) {
-               free(c->c_peer_domain);
-               c->c_peer_domain = NULL;
-       }
-       if(c->c_peer_name != 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, "PATH=", 5) == 0) {
-                       char *path = c->c_peer_name + 5;
-                       if (path != '\0') {
-                               (void)unlink(path);
-                       }
-               }
-#endif /* LDAP_PF_LOCAL */
-
-               free(c->c_peer_name);
-               c->c_peer_name = NULL;
+       if(c->c_peer_domain.bv_val != NULL) {
+               free(c->c_peer_domain.bv_val);
+               c->c_peer_domain.bv_val = NULL;
        }
-       if(c->c_sock_name != NULL) {
-               free(c->c_sock_name);
-               c->c_sock_name = NULL;
+       c->c_peer_domain.bv_len = 0;
+       if(c->c_peer_name.bv_val != NULL) {
+               free(c->c_peer_name.bv_val);
+               c->c_peer_name.bv_val = NULL;
        }
+       c->c_peer_name.bv_len = 0;
 
        c->c_sasl_bind_in_progress = 0;
-       if(c->c_sasl_bind_mech != NULL) {
-               free(c->c_sasl_bind_mech);
-               c->c_sasl_bind_mech = NULL;
+       if(c->c_sasl_bind_mech.bv_val != NULL) {
+               free(c->c_sasl_bind_mech.bv_val);
+               c->c_sasl_bind_mech.bv_val = NULL;
        }
+       c->c_sasl_bind_mech.bv_len = 0;
 
        slap_sasl_close( c );
 
@@ -671,8 +662,8 @@ connection_destroy( Connection *c )
                slapd_remove( sd, 0 );
 
                Statslog( LDAP_DEBUG_STATS,
-                   "conn=%ld fd=%d closed\n",
-                       c->c_connid, sd, 0, 0, 0 );
+                   "conn=%lu fd=%d closed\n",
+                       connid, sd, 0, 0, 0 );
        }
 
        ber_sockbuf_free( c->c_sb );
@@ -709,17 +700,14 @@ static void connection_abandon( Connection *c )
 
        Operation *o;
 
-       for( o = c->c_ops; o != NULL; o = o->o_next ) {
-               ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
+       LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
                o->o_abandon = 1;
-               ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
        }
 
        /* remove pending operations */
-       for( o = slap_op_pop( &c->c_pending_ops );
-               o != NULL;
-               o = slap_op_pop( &c->c_pending_ops ) )
-       {
+       while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
+               LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
+               LDAP_STAILQ_NEXT(o, o_next) = NULL;
                slap_op_free( o );
        }
 }
@@ -738,12 +726,12 @@ void connection_closing( Connection *c )
 
                ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
-                          "connection_closing: conn %d readying socket %d for close.\n",
-                          c->c_connid, sd ));
+               LDAP_LOG( CONNECTION, DETAIL1, 
+                          "connection_closing: conn %lu readying socket %d for close.\n",
+                          c->c_connid, sd, 0 );
 #else
                Debug( LDAP_DEBUG_TRACE,
-                       "connection_closing: readying conn=%ld sd=%d for close\n",
+                       "connection_closing: readying conn=%lu sd=%d for close\n",
                        c->c_connid, sd, 0 );
 #endif
                /* update state to closing */
@@ -773,25 +761,24 @@ static void connection_close( Connection *c )
        /* note: connections_mutex and c_mutex should be locked by caller */
 
        ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
-       if( c->c_ops != NULL ) {
+       if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
-                          "connection_close: conn %d  deferring sd %d\n",
-                          c->c_connid, sd ));
+               LDAP_LOG( CONNECTION, DETAIL1, 
+                          "connection_close: conn %lu  deferring sd %d\n",
+                          c->c_connid, sd, 0 );
 #else
                Debug( LDAP_DEBUG_TRACE,
-                       "connection_close: deferring conn=%ld sd=%d\n",
+                       "connection_close: deferring conn=%lu sd=%d\n",
                        c->c_connid, sd, 0 );
 #endif
                return;
        }
 
 #ifdef NEW_LOGGING
-       LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
-                  "connection_close: conn %d  sd %d\n",
-                  c->c_connid, sd ));
+       LDAP_LOG( CONNECTION, RESULTS, 
+                  "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 #else
-       Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
+       Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
                c->c_connid, sd, 0 );
 #endif
        connection_destroy( c );
@@ -879,109 +866,220 @@ void connection_done( Connection *c )
  * calls the appropriate stub to handle it.
  */
 
+#ifdef SLAPD_MONITOR
+#define INCR_OP(var,index) \
+       do { \
+               ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
+               (var)[(index)]++; \
+               ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
+       } while (0)
+#else /* !SLAPD_MONITOR */
+#define INCR_OP(var,index) 
+#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;
-       Connection *conn = arg->co_conn;
+       int rc = SLAPD_DISCONNECT;
+       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 = op->o_conn;
+       void *memctx;
+       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;
+
        if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
-                          "connection_operation: conn %d  SASL bind in progress (tag=%ld).\n",
-                          conn->c_connid, (long)tag ));
+               LDAP_LOG( CONNECTION, ERR, 
+                       "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
+                       conn->c_connid, (long)tag, 0 );
 #else
                Debug( LDAP_DEBUG_ANY, "connection_operation: "
                        "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" );
                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.
+        */
+#define        SLAB_SIZE       1048576
+#if 0
+       memsiz = ber_len( op->o_ber ) * 64;
+       if ( SLAB_SIZE > memsiz ) memsiz = SLAB_SIZE;
+#endif
+       memsiz = 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 ) {
+               ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, memctx );
+       }
+
        switch ( tag ) {
        case LDAP_REQ_BIND:
-               rc = do_bind( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
+               rc = do_bind( op, &rs );
                break;
 
        case LDAP_REQ_UNBIND:
-               rc = do_unbind( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
+               rc = do_unbind( op, &rs );
                break;
 
        case LDAP_REQ_ADD:
-               rc = do_add( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
+               rc = do_add( op, &rs );
                break;
 
        case LDAP_REQ_DELETE:
-               rc = do_delete( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
+               rc = do_delete( op, &rs );
                break;
 
        case LDAP_REQ_MODRDN:
-               rc = do_modrdn( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
+               rc = do_modrdn( op, &rs );
                break;
 
        case LDAP_REQ_MODIFY:
-               rc = do_modify( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
+               rc = do_modify( op, &rs );
                break;
 
        case LDAP_REQ_COMPARE:
-               rc = do_compare( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
+               rc = do_compare( op, &rs );
                break;
 
        case LDAP_REQ_SEARCH:
-               rc = do_search( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
+               rc = do_search( op, &rs );
                break;
 
        case LDAP_REQ_ABANDON:
-               rc = do_abandon( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
+               rc = do_abandon( op, &rs );
                break;
 
        case LDAP_REQ_EXTENDED:
-               rc = do_extended( conn, arg->co_op );
+               INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
+               rc = do_extended( op, &rs );
                break;
 
        default:
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connection_operation: conn %d  unknown LDAP request 0x%lx\n",
-                          conn->c_connid, tag ));
+               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" );
+               op->o_tag = LBER_ERROR;
+               rs.sr_err = LDAP_PROTOCOL_ERROR;
+               rs.sr_text = "unknown LDAP request";
+               send_ldap_disconnect( op, &rs );
                rc = -1;
                break;
        }
 
+#ifdef SLAPD_MONITOR
+       oldtag = tag;
+#endif /* SLAPD_MONITOR */
        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) {
+       case LDAP_REQ_BIND:
+               num_ops_completed_[SLAP_OP_BIND]++;
+               break;
+       case LDAP_REQ_UNBIND:
+               num_ops_completed_[SLAP_OP_UNBIND]++;
+               break;
+       case LDAP_REQ_ADD:
+               num_ops_completed_[SLAP_OP_ADD]++;
+               break;
+       case LDAP_REQ_DELETE:
+               num_ops_completed_[SLAP_OP_DELETE]++;
+               break;
+       case LDAP_REQ_MODRDN:
+               num_ops_completed_[SLAP_OP_MODRDN]++;
+               break;
+       case LDAP_REQ_MODIFY:
+               num_ops_completed_[SLAP_OP_MODIFY]++;
+               break;
+       case LDAP_REQ_COMPARE:
+               num_ops_completed_[SLAP_OP_COMPARE]++;
+               break;
+       case LDAP_REQ_SEARCH:
+               num_ops_completed_[SLAP_OP_SEARCH]++;
+               break;
+       case LDAP_REQ_ABANDON:
+               num_ops_completed_[SLAP_OP_ABANDON]++;
+               break;
+       case LDAP_REQ_EXTENDED:
+               num_ops_completed_[SLAP_OP_EXTENDED]++;
+               break;
+       }
+#endif /* SLAPD_MONITOR */
        ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 
+#ifdef LDAP_EXOP_X_CANCEL
+       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();
+       }
+#endif
+
        ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 
        conn->c_n_ops_executing--;
        conn->c_n_ops_completed++;
 
-       slap_op_remove( &conn->c_ops, arg->co_op );
-       slap_op_free( arg->co_op );
-       arg->co_op = NULL;
-       arg->co_conn = NULL;
-       free( (char *) arg );
-       arg = NULL;
+       LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
+       LDAP_STAILQ_NEXT(op, o_next) = NULL;
+
+#if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
+       if ( op->o_cancel == SLAP_CANCEL_ACK )
+               goto co_op_free;
+#endif
+#ifdef LDAP_CLIENT_UPDATE
+       if ( ( op->o_clientupdate_type & SLAP_LCUP_PERSIST ) )
+               goto no_co_op_free;
+#endif
+#ifdef LDAP_SYNC
+       if ( ( op->o_sync_mode & SLAP_SYNC_PERSIST ) )
+               goto no_co_op_free;
+#endif
+
+co_op_free:
+
+       ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, NULL );
+       slap_op_free( op );
+
+no_co_op_free:
 
        switch( tag ) {
        case LBER_ERROR:
@@ -1010,6 +1108,7 @@ int connection_read(ber_socket_t s)
 {
        int rc = 0;
        Connection *c;
+
        assert( connections != NULL );
 
        ldap_pvt_thread_mutex_lock( &connections_mutex );
@@ -1019,9 +1118,8 @@ int connection_read(ber_socket_t s)
 
        if( c == NULL ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connection_read: sock %ld no connection\n",
-                          (long)s ));
+               LDAP_LOG( CONNECTION, INFO, 
+                       "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY,
                        "connection_read(%ld): no connection!\n",
@@ -1037,12 +1135,12 @@ int connection_read(ber_socket_t s)
 
        if( c->c_conn_state == SLAP_C_CLOSING ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connection_read: conn %d connection closing, ignoring input\n",
-                          c->c_connid));
+               LDAP_LOG( CONNECTION, INFO, 
+                       "connection_read: conn %lu connection closing, ignoring input\n",
+                       c->c_connid, 0, 0 );
 #else
                Debug( LDAP_DEBUG_TRACE,
-                       "connection_read(%d): closing, ignoring input for id=%ld\n",
+                       "connection_read(%d): closing, ignoring input for id=%lu\n",
                        s, c->c_connid, 0 );
 #endif
                connection_return( c );
@@ -1051,11 +1149,12 @@ int connection_read(ber_socket_t s)
        }
 
 #ifdef NEW_LOGGING
-       LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
-                  "connection_read: conn %d  checking for input.\n", c->c_connid ));
+       LDAP_LOG( CONNECTION, DETAIL1, 
+                  "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=%ld\n",
+               "connection_read(%d): checking for input on id=%lu\n",
                s, c->c_connid, 0 );
 #endif
 
@@ -1063,17 +1162,19 @@ int connection_read(ber_socket_t s)
        if ( c->c_is_tls && c->c_needs_tls_accept ) {
                rc = ldap_pvt_tls_accept( c->c_sb, NULL );
                if ( rc < 0 ) {
+#if 0 /* required by next #if 0 */
                        struct timeval tv;
                        fd_set rfd;
+#endif
 
 #ifdef NEW_LOGGING
-                       LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
-                                  "connection_read: conn %d  TLS accept error, error %d\n",
-                                  c->c_connid, rc ));
+                       LDAP_LOG( CONNECTION, ERR, 
+                                  "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 "
-                               "error=%d id=%ld, closing\n",
+                               "error=%d id=%lu, closing\n",
                                s, rc, c->c_connid );
 #endif
                        c->c_needs_tls_accept = 0;
@@ -1085,38 +1186,56 @@ int connection_read(ber_socket_t s)
                         * to propagate to client. */
                        FD_ZERO(&rfd);
                        FD_SET(s, &rfd);
-                       for (rc=1; rc>0;)
-                       {
+                       for (rc=1; rc>0;) {
                            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);
+                           if (rc == 1) {
+                                       ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
+                               }
                        }
 #endif
                        connection_close( c );
 
                } else if ( rc == 0 ) {
                        void *ssl;
-                       char *authid;
+                       struct berval authid = { 0, NULL };
 
                        c->c_needs_tls_accept = 0;
 
                        /* we need to let SASL know */
-                       ssl = (void *)ldap_pvt_tls_sb_ctx( c->c_sb );
+                       ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
 
                        c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
                        if( c->c_tls_ssf > c->c_ssf ) {
                                c->c_ssf = c->c_tls_ssf;
                        }
 
-                       authid = (char *)ldap_pvt_tls_get_peer( ssl );
-                       slap_sasl_external( c, c->c_tls_ssf, authid );
+                       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 );
+#else
+                               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 );
+               }
+
+               /* if success and data is ready, fall thru to data input loop */
+               if( rc != 0 ||
+                       !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
+               {
+                       connection_return( c );
+                       ldap_pvt_thread_mutex_unlock( &connections_mutex );
+                       return 0;
                }
-               connection_return( c );
-               ldap_pvt_thread_mutex_unlock( &connections_mutex );
-               return 0;
        }
 #endif
 
@@ -1128,13 +1247,13 @@ int connection_read(ber_socket_t s)
 
                if( rc != LDAP_SUCCESS ) {
 #ifdef NEW_LOGGING
-                       LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
-                                  "connection_read: conn %d SASL install error %d, closing\n",
-                                  c->c_connid, rc ));
+                       LDAP_LOG( CONNECTION, ERR, 
+                               "connection_read: conn %lu SASL install error %d, closing\n",
+                               c->c_connid, rc, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE,
                                "connection_read(%d): SASL install error "
-                               "error=%d id=%ld, closing\n",
+                               "error=%d id=%lu, closing\n",
                                s, rc, c->c_connid );
 #endif
                        /* connections_mutex and c_mutex are locked */
@@ -1148,25 +1267,29 @@ 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", LDAP_LEVEL_ERR,
-                          "connection_read: conn %d  input error %d, closing.\n",
-                          c->c_connid, rc ));
+               LDAP_LOG( CONNECTION, ERR, 
+                       "connection_read: conn %lu  input error %d, closing.\n",
+                       c->c_connid, rc, 0 );
 #else
                Debug( LDAP_DEBUG_TRACE,
-                       "connection_read(%d): input error=%d id=%ld, closing.\n",
+                       "connection_read(%d): input error=%d id=%lu, closing.\n",
                        s, rc, c->c_connid );
 #endif
                /* connections_mutex and c_mutex are locked */
@@ -1200,16 +1323,19 @@ connection_input(
        ber_len_t       len;
        ber_int_t       msgid;
        BerElement      *ber;
+       int             rc;
 #ifdef LDAP_CONNECTIONLESS
        Sockaddr        peeraddr;
        char            *cdn = NULL;
 #endif
 
-       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", LDAP_LEVEL_ERR,
-                          "connection_input: conn %d  ber_alloc failed.\n", conn->c_connid ));
+               LDAP_LOG( CONNECTION, ERR, 
+                       "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 );
 #endif
@@ -1219,8 +1345,7 @@ 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));
@@ -1230,9 +1355,8 @@ connection_input(
                        inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
                        (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
                Statslog( LDAP_DEBUG_STATS,
-                           "conn=%ld UDP request from %s (%s) accepted.\n",
-                           conn->c_connid, peername,
-                           conn->c_sock_name, 0, 0 );
+                       "conn=%lu UDP request from %s (%s) accepted.\n",
+                       conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
        }
 #endif
        tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
@@ -1243,9 +1367,9 @@ connection_input(
                ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
 
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
-                          "connection_input: conn %d  ber_get_next failed, errno %d (%s).\n",
-                          conn->c_connid, err, sock_errstr(err) ));
+               LDAP_LOG( CONNECTION, ERR, 
+                       "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
+                       conn->c_connid, err, sock_errstr(err) );
 #else
                Debug( LDAP_DEBUG_TRACE,
                        "ber_get_next on fd %d failed errno=%d (%s)\n",
@@ -1267,9 +1391,9 @@ connection_input(
        if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
                /* log, close and send error */
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
-                          "connection_input: conn %d  ber_get_int returns 0x%lx.\n",
-                          conn->c_connid, tag ));
+               LDAP_LOG( CONNECTION, ERR, 
+                       "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 );
@@ -1281,9 +1405,9 @@ connection_input(
        if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
                /* log, close and send error */
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
-                          "connection_input: conn %d  ber_peek_tag returns 0x%lx.\n",
-                          conn->c_connid, tag ));
+               LDAP_LOG( CONNECTION, ERR, 
+                          "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 );
@@ -1294,16 +1418,16 @@ 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", LDAP_LEVEL_ERR,
-                              "connection_input: conn %d  invalid req for UDP 0x%lx.\n",
-                              conn->c_connid, tag ));
+                   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 );
@@ -1320,29 +1444,83 @@ connection_input(
 
        op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
 
+       op->o_conn = conn;
+       op->vrFilter = NULL;
+#ifdef LDAP_CONTROL_PAGEDRESULTS
+       op->o_pagedresults_state = conn->c_pagedresults_state;
+#endif
 #ifdef LDAP_CONNECTIONLESS
-       op->o_peeraddr = peeraddr;
-       if (cdn) {
-           op->o_dn = cdn;
-           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
+                       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.
+        */
        if ( conn->c_conn_state == SLAP_C_BINDING
-               || conn->c_conn_state == SLAP_C_CLOSING )
+               || conn->c_conn_state == SLAP_C_CLOSING
+               || conn->c_n_ops_executing >= connection_pool_max/2
+               || conn->c_n_ops_pending
+               || conn->c_writewaiter)
        {
+               int max = conn->c_dn.bv_len ? slap_conn_max_pending_auth
+                        : slap_conn_max_pending;
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                          "connection_input: conn %d  deferring operation\n",
-                          conn->c_connid ));
+               LDAP_LOG( CONNECTION, INFO, 
+                       "connection_input: conn %lu  deferring operation\n",
+                       conn->c_connid, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
 #endif
                conn->c_n_ops_pending++;
-               slap_op_add( &conn->c_pending_ops, op );
-
+               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
@@ -1353,7 +1531,7 @@ connection_input(
 #endif
        assert( conn->c_struct_state == SLAP_C_USED );
 
-       return 0;
+       return rc;
 }
 
 static int
@@ -1371,12 +1549,12 @@ connection_resched( Connection *conn )
 
                if( rc ) {
 #ifdef NEW_LOGGING
-                       LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
-                                  "connection_resched: conn %d  reaquiring locks.\n",
-                                  conn->c_connid ));
+                       LDAP_LOG( CONNECTION, DETAIL1, 
+                               "connection_resched: conn %lu  reaquiring locks.\n",
+                               conn->c_connid, 0, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE,
-                               "connection_resched: reaquiring locks conn=%ld sd=%d\n",
+                               "connection_resched: reaquiring locks conn=%lu sd=%d\n",
                                conn->c_connid, sd, 0 );
 #endif
                        /*
@@ -1391,22 +1569,22 @@ connection_resched( Connection *conn )
 
                if( conn->c_conn_state != SLAP_C_CLOSING ) {
 #ifdef NEW_LOGGING
-                       LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
-                                  "connection_resched: conn %d  closed by other thread.\n",
-                                  conn->c_connid ));
+                       LDAP_LOG( CONNECTION, INFO, 
+                               "connection_resched: conn %lu  closed by other thread.\n",
+                               conn->c_connid, 0, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE, "connection_resched: "
-                               "closed by other thread conn=%ld sd=%d\n",
+                               "closed by other thread conn=%lu sd=%d\n",
                                conn->c_connid, sd, 0 );
 #endif
                } else {
 #ifdef NEW_LOGGING
-                       LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
-                                  "connection_resched: conn %d  attempting closing.\n",
-                                  conn->c_connid ));
+                       LDAP_LOG( CONNECTION, DETAIL1, 
+                               "connection_resched: conn %lu  attempting closing.\n",
+                               conn->c_connid, 0, 0 );
 #else
                        Debug( LDAP_DEBUG_TRACE, "connection_resched: "
-                               "attempting closing conn=%ld sd=%d\n",
+                               "attempting closing conn=%lu sd=%d\n",
                                conn->c_connid, sd, 0 );
 #endif
                        connection_close( conn );
@@ -1416,22 +1594,24 @@ 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;
        }
 
-       for( op = slap_op_pop( &conn->c_pending_ops );
-               op != NULL;
-               op = slap_op_pop( &conn->c_pending_ops ) )
-       {
+       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 */
                assert(!op->o_abandon);
 
                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;
@@ -1440,46 +1620,44 @@ connection_resched( Connection *conn )
        return 0;
 }
 
-static int connection_op_activate( Connection *conn, Operation *op )
+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;
+               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) {
-           arg->co_op->o_authz = conn->c_authz;
-           arg->co_op->o_dn = ch_strdup( conn->c_dn != NULL ? conn->c_dn : "" );
+       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_ndn = ch_strdup( arg->co_op->o_dn );
-       (void) dn_normalize( arg->co_op->o_ndn );
-       arg->co_op->o_authtype = conn->c_authtype;
-       arg->co_op->o_authmech = conn->c_authmech != NULL
-               ?  ch_strdup( conn->c_authmech ) : NULL;
+       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;
 
-       slap_op_add( &conn->c_ops, arg->co_op );
+       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", LDAP_LEVEL_ERR,
-                          "connection_op_activate: conn %d      thread pool submit failed.\n",
-                          conn->c_connid ));
+               LDAP_LOG( CONNECTION, ERR, 
+                       "connection_op_activate: conn %lu        thread pool submit failed.\n",
+                       op->o_connid, 0, 0 );
 #else
                Debug( LDAP_DEBUG_ANY,
                "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
@@ -1493,6 +1671,7 @@ static int connection_op_activate( Connection *conn, Operation *op )
 int connection_write(ber_socket_t s)
 {
        Connection *c;
+
        assert( connections != NULL );
 
        ldap_pvt_thread_mutex_lock( &connections_mutex );
@@ -1503,8 +1682,8 @@ int connection_write(ber_socket_t s)
 
        if( c == NULL ) {
 #ifdef NEW_LOGGING
-               LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
-                          "connection_write: sock %ld  no connection!\n",(long)s));
+               LDAP_LOG( CONNECTION, ERR, 
+                       "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
 #else
                Debug( LDAP_DEBUG_ANY,
                        "connection_write(%ld): no connection!\n",
@@ -1518,12 +1697,11 @@ int connection_write(ber_socket_t s)
        c->c_n_write++;
 
 #ifdef NEW_LOGGING
-       LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
-                  "connection_write conn %d  waking output.\n",
-                  c->c_connid ));
+       LDAP_LOG( CONNECTION, DETAIL1, 
+               "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
 #else
        Debug( LDAP_DEBUG_TRACE,
-               "connection_write(%d): waking output for id=%ld\n",
+               "connection_write(%d): waking output for id=%lu\n",
                s, c->c_connid, 0 );
 #endif
        ldap_pvt_thread_cond_signal( &c->c_write_cv );
@@ -1537,65 +1715,3 @@ int connection_write(ber_socket_t s)
        return 0;
 }
 
-
-/*
- * Create client side and server side connection structures, connected to
- * one another, for the front end to use for searches on arbitrary back ends.
- */
-
-int connection_internal_open( Connection **conn, LDAP **ldp, const char *id )
-{
-       int rc;
-       ber_socket_t fd[2] = {-1,-1};
-       Operation *op;
-
-       *conn=NULL;
-       *ldp=NULL;
-
-       rc = lutil_pair( fd );
-       if( rc == -1 ) {
-               return LDAP_OTHER;
-       }
-
-       rc = connection_init( fd[1], "INT", "localhost", 
-      "localhost:0", "localhost:00", 0, 256, id );
-       if( rc < 0 ) {
-               tcp_close( fd[0] );
-               tcp_close( fd[1] );
-               return LDAP_OTHER;
-       }
-       slapd_add_internal( fd[1] );
-
-       /* A search operation, number 0 */
-       op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0);
-       op->o_ndn = ch_strdup( id );
-       op->o_protocol = LDAP_VERSION3;
-
-       (*conn) = connection_get( fd[1] );
-       (*conn)->c_ops = op;
-    (*conn)->c_conn_state = SLAP_C_ACTIVE;
-
-
-       /* Create the client side of the connection */
-       rc = ldap_open_internal_connection( ldp, &(fd[0]) );
-       if( rc != LDAP_SUCCESS ) {
-               tcp_close( fd[0] );
-               return LDAP_OTHER;
-       }
-
-       /* The connection_get() will have locked the connection's mutex */
-       ldap_pvt_thread_mutex_unlock(  &((*conn)->c_mutex) );
-
-       return LDAP_SUCCESS;
-}
-
-
-void connection_internal_close( Connection *conn )
-{
-       Operation *op = conn->c_ops;
-
-       slap_op_remove( &conn->c_ops, op );
-       slap_op_free( op );
-       connection_closing( conn );
-       connection_close( conn );
-}