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