119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/****************************************************************************
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* net/local/local_release.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <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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/* There should be no references on this structure */
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DEBUGASSERT(conn->lc_crefs == 0);
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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_CONNECTING ||
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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 =
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(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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nxsem_post(&client->lc_waitsem);
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local_event_pollnotify(client, POLLOUT);
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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();
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return OK;
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}
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#endif /* CONFIG_NET && CONFIG_NET_LOCAL */
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