s4:ldap_server: rewrite to socket layer to use tstream
[mat/samba.git] / source4 / ldap_server / ldap_server.c
index e975590d43b822d7765c596c56a65e30ebcc06c4..56e1bdc126edc1142c210ec5a827fb90548c46a0 100644 (file)
@@ -22,6 +22,7 @@
 */
 
 #include "includes.h"
+#include "system/network.h"
 #include "lib/events/events.h"
 #include "auth/auth.h"
 #include "auth/credentials/credentials.h"
 #include "lib/socket/netif.h"
 #include "dsdb/samdb/samdb.h"
 #include "param/param.h"
-/*
-  close the socket and shutdown a server_context
-*/
-void ldapsrv_terminate_connection(struct ldapsrv_connection *conn, 
-                                        const char *reason)
-{
-       packet_recv_disable(conn->packet);
-       TALLOC_FREE(conn->packet);
-       TALLOC_FREE(conn->sockets.tls);
-       stream_terminate_connection(conn->connection, reason);
-}
+#include "../lib/tsocket/tsocket.h"
+#include "../lib/util/tevent_ntstatus.h"
+#include "../libcli/util/tstream.h"
 
-/*
-  handle packet errors
-*/
-static void ldapsrv_error_handler(void *private_data, NTSTATUS status)
-{
-       struct ldapsrv_connection *conn = talloc_get_type(private_data,
-                                                         struct ldapsrv_connection);
-       ldapsrv_terminate_connection(conn, nt_errstr(status));
-}
+static void ldapsrv_terminate_connection_done(struct tevent_req *subreq);
 
 /*
-  process a decoded ldap message
+  close the socket and shutdown a server_context
 */
-static void ldapsrv_process_message(struct ldapsrv_connection *conn,
-                                   struct ldap_message *msg)
+static void ldapsrv_terminate_connection(struct ldapsrv_connection *conn,
+                                        const char *reason)
 {
-       struct ldapsrv_call *call;
-       NTSTATUS status;
-       DATA_BLOB blob;
+       struct tevent_req *subreq;
 
-       call = talloc(conn, struct ldapsrv_call);
-       if (!call) {
-               ldapsrv_terminate_connection(conn, "no memory");
-               return;         
-       }
-
-       call->request = talloc_steal(call, msg);
-       call->conn = conn;
-       call->replies = NULL;
-       call->send_callback = NULL;
-       call->send_private = NULL;
-
-       /* make the call */
-       status = ldapsrv_do_call(call);
-       if (!NT_STATUS_IS_OK(status)) {
-               talloc_free(call);
-               return;
-       }
-
-       blob = data_blob(NULL, 0);
-
-       if (call->replies == NULL) {
-               talloc_free(call);
+       if (conn->limits.reason) {
                return;
        }
 
-       /* build all the replies into a single blob */
-       while (call->replies) {
-               DATA_BLOB b;
-               bool ret;
+       conn->limits.endtime = timeval_current_ofs(0, 500);
 
-               msg = call->replies->msg;
-               if (!ldap_encode(msg, samba_ldap_control_handlers(), &b, call)) {
-                       DEBUG(0,("Failed to encode ldap reply of type %d\n", msg->type));
-                       talloc_free(call);
-                       return;
-               }
+       DEBUG(2,("ldapsrv_terminate_connection: %s - disconnecting\n",
+                reason));
 
-               ret = data_blob_append(call, &blob, b.data, b.length);
-               data_blob_free(&b);
-
-               talloc_set_name_const(blob.data, "Outgoing, encoded LDAP packet");
-
-               if (!ret) {
-                       talloc_free(call);
-                       return;
-               }
-
-               DLIST_REMOVE(call->replies, call->replies);
+       tevent_queue_stop(conn->sockets.send_queue);
+       if (conn->active_call) {
+               tevent_req_cancel(conn->active_call);
+               conn->active_call = NULL;
        }
 
-       packet_send_callback(conn->packet, blob, 
-                            call->send_callback, call->send_private);
-       talloc_free(call);
-       return;
-}
-
-/*
-  disable packets on other sockets while processing this one
- */
-static void ldapsrv_disable_recv(struct ldapsrv_connection *conn)
-{
-       struct ldapsrv_packet_interfaces *p;
-       for (p=conn->service->packet_interfaces; p; p=p->next) {
-               if (p->packet != conn->packet) {
-                       packet_recv_disable(p->packet);
-               }
+       conn->limits.reason = talloc_strdup(conn, reason);
+       if (conn->limits.reason == NULL) {
+               TALLOC_FREE(conn->sockets.tls);
+               TALLOC_FREE(conn->sockets.sasl);
+               TALLOC_FREE(conn->sockets.raw);
+               stream_terminate_connection(conn->connection, reason);
+               return;
        }
-}
 
-/*
-  disable packets on other sockets while processing this one
- */
-static void ldapsrv_enable_recv(struct ldapsrv_connection *conn)
-{
-       struct ldapsrv_packet_interfaces *p;
-       for (p=conn->service->packet_interfaces; p; p=p->next) {
-               if (p->packet != conn->packet) {
-                       packet_recv_enable(p->packet);
-               }
+       subreq = tstream_disconnect_send(conn,
+                                        conn->connection->event.ctx,
+                                        conn->sockets.active);
+       if (subreq == NULL) {
+               TALLOC_FREE(conn->sockets.tls);
+               TALLOC_FREE(conn->sockets.sasl);
+               TALLOC_FREE(conn->sockets.raw);
+               stream_terminate_connection(conn->connection, reason);
+               return;
        }
+       tevent_req_set_endtime(subreq,
+                              conn->connection->event.ctx,
+                              conn->limits.endtime);
+       tevent_req_set_callback(subreq, ldapsrv_terminate_connection_done, conn);
 }
 
-/*
-  decode/process data
-*/
-static NTSTATUS ldapsrv_decode(void *private_data, DATA_BLOB blob)
+static void ldapsrv_terminate_connection_done(struct tevent_req *subreq)
 {
-       NTSTATUS status;
-       struct ldapsrv_connection *conn = talloc_get_type(private_data,
-                                                         struct ldapsrv_connection);
-       struct asn1_data *asn1 = asn1_init(conn);
-       struct ldap_message *msg = talloc(conn, struct ldap_message);
+       struct ldapsrv_connection *conn =
+               tevent_req_callback_data(subreq,
+               struct ldapsrv_connection);
+       int ret;
+       int sys_errno;
 
-       if (asn1 == NULL || msg == NULL) {
-               return NT_STATUS_NO_MEMORY;
-       }
+       ret = tstream_disconnect_recv(subreq, &sys_errno);
+       TALLOC_FREE(subreq);
 
-       if (!asn1_load(asn1, blob)) {
-               talloc_free(msg);
-               talloc_free(asn1);
-               return NT_STATUS_NO_MEMORY;
+       if (conn->sockets.active == conn->sockets.raw) {
+               TALLOC_FREE(conn->sockets.tls);
+               TALLOC_FREE(conn->sockets.sasl);
+               TALLOC_FREE(conn->sockets.raw);
+               stream_terminate_connection(conn->connection,
+                                           conn->limits.reason);
+               return;
        }
 
-       status = ldap_decode(asn1, samba_ldap_control_handlers(), msg);
-       if (!NT_STATUS_IS_OK(status)) {
-               asn1_free(asn1);
-               return status;
+       TALLOC_FREE(conn->sockets.tls);
+       TALLOC_FREE(conn->sockets.sasl);
+       conn->sockets.active = conn->sockets.raw;
+
+       subreq = tstream_disconnect_send(conn,
+                                        conn->connection->event.ctx,
+                                        conn->sockets.active);
+       if (subreq == NULL) {
+               TALLOC_FREE(conn->sockets.raw);
+               stream_terminate_connection(conn->connection,
+                                           conn->limits.reason);
+               return;
        }
-
-       data_blob_free(&blob);
-       talloc_steal(conn, msg);
-       asn1_free(asn1);
-
-       /* disable messages on other sockets while processing this one */
-       ldapsrv_disable_recv(conn);
-
-       ldapsrv_process_message(conn, msg);
-
-       ldapsrv_enable_recv(conn);
-
-       return NT_STATUS_OK;
-}
-
-/*
- Idle timeout handler
-*/
-static void ldapsrv_conn_idle_timeout(struct tevent_context *ev,
-                                     struct tevent_timer *te,
-                                     struct timeval t,
-                                     void *private_data)
-{
-       struct ldapsrv_connection *conn = talloc_get_type(private_data, struct ldapsrv_connection);
-
-       ldapsrv_terminate_connection(conn, "Timeout. No requests after bind");
+       tevent_req_set_endtime(subreq,
+                              conn->connection->event.ctx,
+                              conn->limits.endtime);
+       tevent_req_set_callback(subreq, ldapsrv_terminate_connection_done, conn);
 }
 
 /*
@@ -216,25 +141,7 @@ static void ldapsrv_conn_idle_timeout(struct tevent_context *ev,
 */
 void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
 {
-       struct ldapsrv_connection *conn = 
-               talloc_get_type(c->private_data, struct ldapsrv_connection);
-
-       if (conn->limits.ite) { /* clean initial timeout if any */
-               talloc_free(conn->limits.ite);
-               conn->limits.ite = NULL;
-       }
-
-       if (conn->limits.te) { /* clean idle timeout if any */
-               talloc_free(conn->limits.te);
-               conn->limits.te = NULL;
-       }
-
-       packet_recv(conn->packet);
-
-       /* set idle timeout */
-       conn->limits.te = event_add_timed(c->event.ctx, conn, 
-                                          timeval_current_ofs(conn->limits.conn_idle_time, 0),
-                                          ldapsrv_conn_idle_timeout, conn);
+       smb_panic(__location__);
 }
 
 /*
@@ -242,20 +149,7 @@ void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
 */
 static void ldapsrv_send(struct stream_connection *c, uint16_t flags)
 {
-       struct ldapsrv_connection *conn = 
-               talloc_get_type(c->private_data, struct ldapsrv_connection);
-
-       packet_queue_run(conn->packet);
-}
-
-static void ldapsrv_conn_init_timeout(struct tevent_context *ev,
-                                     struct tevent_timer *te,
-                                     struct timeval t,
-                                     void *private_data)
-{
-       struct ldapsrv_connection *conn = talloc_get_type(private_data, struct ldapsrv_connection);
-
-       ldapsrv_terminate_connection(conn, "Timeout. No requests after initial connection");
+       smb_panic(__location__);
 }
 
 static int ldapsrv_load_limits(struct ldapsrv_connection *conn)
@@ -356,14 +250,14 @@ failed:
        return -1;
 }
 
-/*
-  remove a packet interface from the service level list
- */
-static int packet_interface_destructor(struct ldapsrv_packet_interfaces *packet_interface)
-{
-       DLIST_REMOVE(packet_interface->service->packet_interfaces, packet_interface);
-       return 0;
-}
+static struct tevent_req *ldapsrv_process_call_send(TALLOC_CTX *mem_ctx,
+                                                   struct tevent_context *ev,
+                                                   struct tevent_queue *call_queue,
+                                                   struct ldapsrv_call *call);
+static NTSTATUS ldapsrv_process_call_recv(struct tevent_req *req);
+
+static bool ldapsrv_call_read_next(struct ldapsrv_connection *conn);
+static void ldapsrv_accept_tls_done(struct tevent_req *subreq);
 
 /*
   initialise a server_context from a open socket and register a event handler
@@ -379,6 +273,9 @@ static void ldapsrv_accept(struct stream_connection *c,
        struct socket_address *socket_address;
        NTSTATUS status;
        int port;
+       int ret;
+       struct tevent_req *subreq;
+       struct timeval endtime;
 
        conn = talloc_zero(c, struct ldapsrv_connection);
        if (!conn) {
@@ -386,10 +283,31 @@ static void ldapsrv_accept(struct stream_connection *c,
                return;
        }
 
-       conn->packet      = NULL;
+       conn->sockets.send_queue = tevent_queue_create(conn, "ldapsev send queue");
+       if (conn->sockets.send_queue == NULL) {
+               stream_terminate_connection(c,
+                                           "ldapsrv_accept: tevent_queue_create failed");
+               return;
+       }
+
+       TALLOC_FREE(c->event.fde);
+
+       /*
+        * Clone the fd that the connection isn't closed if we create a client
+        * connection.
+        */
+       ret = tstream_bsd_existing_socket(conn,
+                                         socket_get_fd(c->socket),
+                                         &conn->sockets.raw);
+       if (ret == -1) {
+               stream_terminate_connection(c,
+                                           "ldapsrv_accept: out of memory");
+               return;
+       }
+       socket_set_flags(c->socket, SOCKET_FLAG_NOCLOSE);
+
        conn->connection  = c;
        conn->service     = ldapsrv_service;
-       conn->sockets.raw = c->socket;
        conn->lp_ctx      = ldapsrv_service->task->lp_ctx;
 
        c->private_data   = conn;
@@ -401,54 +319,9 @@ static void ldapsrv_accept(struct stream_connection *c,
        }
        port = socket_address->port;
        talloc_free(socket_address);
-
-       if (port == 636) {
-               struct socket_context *tls_socket = tls_init_server(ldapsrv_service->tls_params, c->socket, 
-                                                                   c->event.fde, NULL);
-               if (!tls_socket) {
-                       ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
-                       return;
-               }
-               talloc_steal(c, tls_socket);
-               c->socket = tls_socket;
-               conn->sockets.tls = tls_socket;
-
-       } else if (port == 3268) /* Global catalog */ {
+       if (port == 3268) /* Global catalog */ {
                conn->global_catalog = true;
        }
-       conn->packet = packet_init(conn);
-       if (conn->packet == NULL) {
-               ldapsrv_terminate_connection(conn, "out of memory");
-               return;
-       }
-
-       packet_set_private(conn->packet, conn);
-       packet_set_socket(conn->packet, c->socket);
-       packet_set_callback(conn->packet, ldapsrv_decode);
-       packet_set_full_request(conn->packet, ldap_full_packet);
-       packet_set_error_handler(conn->packet, ldapsrv_error_handler);
-       packet_set_event_context(conn->packet, c->event.ctx);
-       packet_set_fde(conn->packet, c->event.fde);
-       packet_set_serialise(conn->packet);
-
-       if (conn->sockets.tls) {
-               packet_set_unreliable_select(conn->packet);
-       }
-
-       /* Ensure we don't get packets until the database is ready below */
-       packet_recv_disable(conn->packet);
-
-       /* add to the service level list of packet interfaces, to
-        * allow us to serialise between connections
-        */
-       conn->packet_interface = talloc(conn, struct ldapsrv_packet_interfaces);
-       if (conn->packet_interface == NULL) {
-               ldapsrv_terminate_connection(conn, "out of memory");
-       }
-       conn->packet_interface->service = ldapsrv_service;
-       conn->packet_interface->packet = conn->packet;
-       DLIST_ADD(conn->service->packet_interfaces, conn->packet_interface);
-       talloc_set_destructor(conn->packet_interface, packet_interface_destructor);
 
        server_credentials = cli_credentials_init(conn);
        if (!server_credentials) {
@@ -477,13 +350,405 @@ static void ldapsrv_accept(struct stream_connection *c,
        /* register the server */       
        irpc_add_name(c->msg_ctx, "ldap_server");
 
-       /* set connections limits */
-       conn->limits.ite = event_add_timed(c->event.ctx, conn, 
-                                          timeval_current_ofs(conn->limits.initial_timeout, 0),
-                                          ldapsrv_conn_init_timeout, conn);
+       conn->sockets.active = conn->sockets.raw;
+
+       if (port != 636) {
+               ldapsrv_call_read_next(conn);
+               return;
+       }
+
+       endtime = timeval_current_ofs(conn->limits.conn_idle_time, 0);
+
+       subreq = tstream_tls_accept_send(conn,
+                                        conn->connection->event.ctx,
+                                        conn->sockets.raw,
+                                        conn->service->tls_params);
+       if (subreq == NULL) {
+               ldapsrv_terminate_connection(conn, "ldapsrv_accept: "
+                               "no memory for tstream_tls_accept_send");
+               return;
+       }
+       tevent_req_set_endtime(subreq,
+                              conn->connection->event.ctx,
+                              endtime);
+       tevent_req_set_callback(subreq, ldapsrv_accept_tls_done, conn);
+}
+
+static void ldapsrv_accept_tls_done(struct tevent_req *subreq)
+{
+       struct ldapsrv_connection *conn =
+               tevent_req_callback_data(subreq,
+               struct ldapsrv_connection);
+       int ret;
+       int sys_errno;
+
+       ret = tstream_tls_accept_recv(subreq, &sys_errno,
+                                     conn, &conn->sockets.tls);
+       TALLOC_FREE(subreq);
+       if (ret == -1) {
+               const char *reason;
+
+               reason = talloc_asprintf(conn, "ldapsrv_accept_tls_loop: "
+                                        "tstream_tls_accept_recv() - %d:%s",
+                                        sys_errno, strerror(sys_errno));
+               if (!reason) {
+                       reason = "ldapsrv_accept_tls_loop: "
+                                "tstream_tls_accept_recv() - failed";
+               }
+
+               ldapsrv_terminate_connection(conn, reason);
+               return;
+       }
+
+       conn->sockets.active = conn->sockets.tls;
+       ldapsrv_call_read_next(conn);
+}
+
+static void ldapsrv_call_read_done(struct tevent_req *subreq);
 
-       packet_recv_enable(conn->packet);
+static bool ldapsrv_call_read_next(struct ldapsrv_connection *conn)
+{
+       struct tevent_req *subreq;
 
+       if (timeval_is_zero(&conn->limits.endtime)) {
+               conn->limits.endtime =
+                       timeval_current_ofs(conn->limits.initial_timeout, 0);
+       } else {
+               conn->limits.endtime =
+                       timeval_current_ofs(conn->limits.conn_idle_time, 0);
+       }
+
+       /*
+        * The minimun size of a LDAP pdu is 7 bytes
+        *
+        * dumpasn1 -hh ldap-unbind-min.dat
+        *
+        *     <30 05 02 01 09 42 00>
+        *    0    5: SEQUENCE {
+        *     <02 01 09>
+        *    2    1:   INTEGER 9
+        *     <42 00>
+        *    5    0:   [APPLICATION 2]
+        *          :     Error: Object has zero length.
+        *          :   }
+        *
+        * dumpasn1 -hh ldap-unbind-windows.dat
+        *
+        *     <30 84 00 00 00 05 02 01 09 42 00>
+        *    0    5: SEQUENCE {
+        *     <02 01 09>
+        *    6    1:   INTEGER 9
+        *     <42 00>
+        *    9    0:   [APPLICATION 2]
+        *          :     Error: Object has zero length.
+        *          :   }
+        *
+        * This means using an initial read size
+        * of 7 is ok.
+        */
+       subreq = tstream_read_pdu_blob_send(conn,
+                                           conn->connection->event.ctx,
+                                           conn->sockets.active,
+                                           7, /* initial_read_size */
+                                           ldap_full_packet,
+                                           conn);
+       if (subreq == NULL) {
+               ldapsrv_terminate_connection(conn, "ldapsrv_call_read_next: "
+                               "no memory for tstream_read_pdu_blob_send");
+               return false;
+       }
+       tevent_req_set_endtime(subreq,
+                              conn->connection->event.ctx,
+                              conn->limits.endtime);
+       tevent_req_set_callback(subreq, ldapsrv_call_read_done, conn);
+       return true;
+}
+
+static void ldapsrv_call_process_done(struct tevent_req *subreq);
+
+static void ldapsrv_call_read_done(struct tevent_req *subreq)
+{
+       struct ldapsrv_connection *conn =
+               tevent_req_callback_data(subreq,
+               struct ldapsrv_connection);
+       NTSTATUS status;
+       struct ldapsrv_call *call;
+       struct asn1_data *asn1;
+       DATA_BLOB blob;
+
+       call = talloc_zero(conn, struct ldapsrv_call);
+       if (!call) {
+               ldapsrv_terminate_connection(conn, "no memory");
+               return;
+       }
+
+       call->conn = conn;
+
+       status = tstream_read_pdu_blob_recv(subreq,
+                                           call,
+                                           &blob);
+       TALLOC_FREE(subreq);
+       if (!NT_STATUS_IS_OK(status)) {
+               const char *reason;
+
+               reason = talloc_asprintf(call, "ldapsrv_call_loop: "
+                                        "tstream_read_pdu_blob_recv() - %s",
+                                        nt_errstr(status));
+               if (!reason) {
+                       reason = nt_errstr(status);
+               }
+
+               ldapsrv_terminate_connection(conn, reason);
+               return;
+       }
+
+       asn1 = asn1_init(call);
+       if (asn1 == NULL) {
+               ldapsrv_terminate_connection(conn, "no memory");
+               return;
+       }
+
+       call->request = talloc(call, struct ldap_message);
+       if (call->request == NULL) {
+               ldapsrv_terminate_connection(conn, "no memory");
+               return;
+       }
+
+       if (!asn1_load(asn1, blob)) {
+               ldapsrv_terminate_connection(conn, "asn1_load failed");
+               return;
+       }
+
+       status = ldap_decode(asn1, samba_ldap_control_handlers(),
+                            call->request);
+       if (!NT_STATUS_IS_OK(status)) {
+               ldapsrv_terminate_connection(conn, nt_errstr(status));
+               return;
+       }
+
+       data_blob_free(&blob);
+
+
+       /* queue the call in the global queue */
+       subreq = ldapsrv_process_call_send(call,
+                                          conn->connection->event.ctx,
+                                          conn->service->call_queue,
+                                          call);
+       if (subreq == NULL) {
+               ldapsrv_terminate_connection(conn, "ldapsrv_process_call_send failed");
+               return;
+       }
+       tevent_req_set_callback(subreq, ldapsrv_call_process_done, call);
+       conn->active_call = subreq;
+}
+
+static void ldapsrv_call_writev_done(struct tevent_req *subreq);
+
+static void ldapsrv_call_process_done(struct tevent_req *subreq)
+{
+       struct ldapsrv_call *call =
+               tevent_req_callback_data(subreq,
+               struct ldapsrv_call);
+       struct ldapsrv_connection *conn = call->conn;
+       NTSTATUS status;
+       DATA_BLOB blob = data_blob_null;
+
+       conn->active_call = NULL;
+
+       status = ldapsrv_process_call_recv(subreq);
+       TALLOC_FREE(subreq);
+       if (!NT_STATUS_IS_OK(status)) {
+               ldapsrv_terminate_connection(conn, nt_errstr(status));
+               return;
+       }
+
+       /* build all the replies into a single blob */
+       while (call->replies) {
+               DATA_BLOB b;
+               bool ret;
+
+               if (!ldap_encode(call->replies->msg, samba_ldap_control_handlers(), &b, call)) {
+                       DEBUG(0,("Failed to encode ldap reply of type %d\n",
+                                call->replies->msg->type));
+                       ldapsrv_terminate_connection(conn, "ldap_encode failed");
+                       return;
+               }
+
+               ret = data_blob_append(call, &blob, b.data, b.length);
+               data_blob_free(&b);
+
+               talloc_set_name_const(blob.data, "Outgoing, encoded LDAP packet");
+
+               if (!ret) {
+                       ldapsrv_terminate_connection(conn, "data_blob_append failed");
+                       return;
+               }
+
+               DLIST_REMOVE(call->replies, call->replies);
+       }
+
+       if (blob.length == 0) {
+               TALLOC_FREE(call);
+
+               ldapsrv_call_read_next(conn);
+               return;
+       }
+
+       call->out_iov.iov_base = blob.data;
+       call->out_iov.iov_len = blob.length;
+
+       subreq = tstream_writev_queue_send(call,
+                                          conn->connection->event.ctx,
+                                          conn->sockets.active,
+                                          conn->sockets.send_queue,
+                                          &call->out_iov, 1);
+       if (subreq == NULL) {
+               ldapsrv_terminate_connection(conn, "stream_writev_queue_send failed");
+               return;
+       }
+       tevent_req_set_callback(subreq, ldapsrv_call_writev_done, call);
+}
+
+static void ldapsrv_call_postprocess_done(struct tevent_req *subreq);
+
+static void ldapsrv_call_writev_done(struct tevent_req *subreq)
+{
+       struct ldapsrv_call *call =
+               tevent_req_callback_data(subreq,
+               struct ldapsrv_call);
+       struct ldapsrv_connection *conn = call->conn;
+       int sys_errno;
+       int rc;
+
+       rc = tstream_writev_queue_recv(subreq, &sys_errno);
+       TALLOC_FREE(subreq);
+       if (rc == -1) {
+               const char *reason;
+
+               reason = talloc_asprintf(call, "ldapsrv_call_writev_done: "
+                                        "tstream_writev_queue_recv() - %d:%s",
+                                        sys_errno, strerror(sys_errno));
+               if (reason == NULL) {
+                       reason = "ldapsrv_call_writev_done: "
+                                "tstream_writev_queue_recv() failed";
+               }
+
+               ldapsrv_terminate_connection(conn, reason);
+               return;
+       }
+
+       if (call->postprocess_send) {
+               subreq = call->postprocess_send(call,
+                                               conn->connection->event.ctx,
+                                               call->postprocess_private);
+               if (subreq == NULL) {
+                       ldapsrv_terminate_connection(conn, "ldapsrv_call_writev_done: "
+                                       "call->postprocess_send - no memory");
+                       return;
+               }
+               tevent_req_set_callback(subreq,
+                                       ldapsrv_call_postprocess_done,
+                                       call);
+               return;
+       }
+
+       TALLOC_FREE(call);
+
+       ldapsrv_call_read_next(conn);
+}
+
+static void ldapsrv_call_postprocess_done(struct tevent_req *subreq)
+{
+       struct ldapsrv_call *call =
+               tevent_req_callback_data(subreq,
+               struct ldapsrv_call);
+       struct ldapsrv_connection *conn = call->conn;
+       NTSTATUS status;
+
+       status = call->postprocess_recv(subreq);
+       TALLOC_FREE(subreq);
+       if (!NT_STATUS_IS_OK(status)) {
+               const char *reason;
+
+               reason = talloc_asprintf(call, "ldapsrv_call_postprocess_done: "
+                                        "call->postprocess_recv() - %s",
+                                        nt_errstr(status));
+               if (reason == NULL) {
+                       reason = nt_errstr(status);
+               }
+
+               ldapsrv_terminate_connection(conn, reason);
+               return;
+       }
+
+       TALLOC_FREE(call);
+
+       ldapsrv_call_read_next(conn);
+}
+
+struct ldapsrv_process_call_state {
+       struct ldapsrv_call *call;
+};
+
+static void ldapsrv_process_call_trigger(struct tevent_req *req,
+                                        void *private_data);
+
+static struct tevent_req *ldapsrv_process_call_send(TALLOC_CTX *mem_ctx,
+                                                   struct tevent_context *ev,
+                                                   struct tevent_queue *call_queue,
+                                                   struct ldapsrv_call *call)
+{
+       struct tevent_req *req;
+       struct ldapsrv_process_call_state *state;
+       bool ok;
+
+       req = tevent_req_create(mem_ctx, &state,
+                               struct ldapsrv_process_call_state);
+       if (req == NULL) {
+               return req;
+       }
+
+       state->call = call;
+
+       ok = tevent_queue_add(call_queue, ev, req,
+                             ldapsrv_process_call_trigger, NULL);
+       if (!ok) {
+               tevent_req_nomem(NULL, req);
+               return tevent_req_post(req, ev);
+       }
+
+       return req;
+}
+
+static void ldapsrv_process_call_trigger(struct tevent_req *req,
+                                        void *private_data)
+{
+       struct ldapsrv_process_call_state *state =
+               tevent_req_data(req,
+               struct ldapsrv_process_call_state);
+       NTSTATUS status;
+
+       /* make the call */
+       status = ldapsrv_do_call(state->call);
+       if (!NT_STATUS_IS_OK(status)) {
+               tevent_req_nterror(req, status);
+               return;
+       }
+
+       tevent_req_done(req);
+}
+
+static NTSTATUS ldapsrv_process_call_recv(struct tevent_req *req)
+{
+       NTSTATUS status;
+
+       if (tevent_req_is_nterror(req, &status)) {
+               tevent_req_received(req);
+               return status;
+       }
+
+       tevent_req_received(req);
+       return NT_STATUS_OK;
 }
 
 static void ldapsrv_accept_nonpriv(struct stream_connection *c)
@@ -562,7 +827,7 @@ static NTSTATUS add_socket(struct tevent_context *event_context,
                return status;
        }
 
-       if (tls_support(ldap_service->tls_params)) {
+       if (tstream_tls_params_enabled(ldap_service->tls_params)) {
                /* add ldaps server */
                port = 636;
                status = stream_setup_socket(event_context, lp_ctx,
@@ -616,6 +881,7 @@ static void ldapsrv_task_init(struct task_server *task)
 #ifdef WITH_LDAPI_PRIV_SOCKET
        char *priv_dir;
 #endif
+       const char *dns_host_name;
        struct ldapsrv_service *ldap_service;
        NTSTATUS status;
        const struct model_ops *model_ops;
@@ -645,8 +911,28 @@ static void ldapsrv_task_init(struct task_server *task)
 
        ldap_service->task = task;
 
-       ldap_service->tls_params = tls_initialise(ldap_service, task->lp_ctx);
-       if (ldap_service->tls_params == NULL) goto failed;
+       dns_host_name = talloc_asprintf(ldap_service, "%s.%s",
+                                       lpcfg_netbios_name(task->lp_ctx),
+                                       lpcfg_dnsdomain(task->lp_ctx));
+       if (dns_host_name == NULL) goto failed;
+
+       status = tstream_tls_params_server(ldap_service,
+                                          dns_host_name,
+                                          lpcfg_tls_enabled(task->lp_ctx),
+                                          lpcfg_tls_keyfile(ldap_service, task->lp_ctx),
+                                          lpcfg_tls_certfile(ldap_service, task->lp_ctx),
+                                          lpcfg_tls_cafile(ldap_service, task->lp_ctx),
+                                          lpcfg_tls_crlfile(ldap_service, task->lp_ctx),
+                                          lpcfg_tls_dhpfile(ldap_service, task->lp_ctx),
+                                          &ldap_service->tls_params);
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(0,("ldapsrv failed tstream_tls_patams_server - %s\n",
+                        nt_errstr(status)));
+               goto failed;
+       }
+
+       ldap_service->call_queue = tevent_queue_create(ldap_service, "ldapsrv_call_queue");
+       if (ldap_service->call_queue == NULL) goto failed;
 
        if (lpcfg_interfaces(task->lp_ctx) && lpcfg_bind_interfaces_only(task->lp_ctx)) {
                struct interface *ifaces;