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- /****************************************************************************
- * net/local/local_release.c
- *
- * Copyright (C) 2015, 2017 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #if defined(CONFIG_NET) && defined(CONFIG_NET_LOCAL)
- #include <semaphore.h>
- #include <errno.h>
- #include <queue.h>
- #include <assert.h>
- #include <nuttx/semaphore.h>
- #include <nuttx/net/net.h>
- #include <arch/irq.h>
- #include "local/local.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: local_release
- *
- * Description:
- * If the local, Unix domain socket is in the connected state, then
- * disconnect it. Release the local connection structure in any event
- *
- * Input Parameters:
- * conn - A reference to local connection structure
- *
- ****************************************************************************/
- int local_release(FAR struct local_conn_s *conn)
- {
- /* There should be no references on this structure */
- DEBUGASSERT(conn->lc_crefs == 0);
- net_lock();
- #ifdef CONFIG_NET_LOCAL_STREAM
- /* We should not bet here with state LOCAL_STATE_ACCEPT. That is an
- * internal state that should be atomic with respect to socket operations.
- */
- DEBUGASSERT(conn->lc_state != LOCAL_STATE_ACCEPT);
- /* If the socket is connected (SOCK_STREAM client), then disconnect it */
- if (conn->lc_state == LOCAL_STATE_CONNECTED ||
- conn->lc_state == LOCAL_STATE_DISCONNECTED)
- {
- DEBUGASSERT(conn->lc_proto == SOCK_STREAM);
- /* Just free the connection structure */
- }
- /* Is the socket is listening socket (SOCK_STREAM server) */
- else if (conn->lc_state == LOCAL_STATE_LISTENING)
- {
- FAR struct local_conn_s *client;
- DEBUGASSERT(conn->lc_proto == SOCK_STREAM);
- /* Are there still clients waiting for a connection to the server? */
- for (client = (FAR struct local_conn_s *)conn->u.server.lc_waiters.head;
- client;
- client = (FAR struct local_conn_s *)dq_next(&client->lc_node))
- {
- client->u.client.lc_result = -ENOTCONN;
- nxsem_post(&client->lc_waitsem);
- }
- conn->u.server.lc_pending = 0;
- /* Remove the server from the list of listeners. */
- dq_rem(&conn->lc_node, &g_local_listeners);
- }
- #endif /* CONFIG_NET_LOCAL_STREAM */
- /* For the remaining states (LOCAL_STATE_UNBOUND and LOCAL_STATE_UNBOUND),
- * we simply free the connection structure.
- */
- /* Free the connection structure */
- local_free(conn);
- net_unlock();
- return OK;
- }
- #endif /* CONFIG_NET && CONFIG_NET_LOCAL */
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