nuttx/libs/libnx/nxmu/nx_disconnect.c

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/****************************************************************************
* libs/libnx/nxmu/nx_disconnect.c
*
* Copyright (C) 2008-2009, 2011-2013 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>
#include <stdio.h>
#include <mqueue.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxmu.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nx_disconnect
*
* Description:
* Disconnect a client from the NX server and/or free resources reserved
* by nx_connect/nx_connectinstance.
*
* Input Parameters:
* handle - the handle returned by nx_connect
*
* Returned Value:
* OK on success; ERROR on failure with the errno set appropriately.
* NOTE that handle will no long be valid upon return.
*
****************************************************************************/
void nx_disconnect(NXHANDLE handle)
{
FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
struct nxsvrmsg_s outmsg;
char climqname[NX_CLIENT_MXNAMELEN];
int ret;
/* Inform the server that this client no longer exists */
outmsg.msgid = NX_SVRMSG_DISCONNECT;
outmsg.conn = conn;
/* We will finish the teardown upon receipt of the DISCONNECTED message */
ret = nxmu_sendserver(conn, &outmsg, sizeof(struct nxsvrmsg_s));
if (ret < 0)
{
gerr("ERROR: nxmu_sendserver() returned %d\n", ret);
}
else
{
snprintf(climqname, sizeof(climqname),
NX_CLIENT_MQNAMEFMT, conn->cid);
(void)mq_unlink(climqname);
}
}