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/****************************************************************************
* netutils/uiplib/uip_server.c
*
* Copyright (C) 2007-2009, 2011 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 Gregory Nutt 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 <sys/types.h>
#include <sys/socket.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>
#include <netinet/in.h>
#include <apps/netutils/uiplib.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: uip_server
*
* Description:
* Implement basic server logic
*
* Parameters:
* portno The port to listen on (in network byte order)
* handler The entrypoint of the task to spawn when a new connection is
* accepted.
* stacksize The stack size needed by the spawned task
*
* Return:
* Does not return unless an error occurs.
*
****************************************************************************/
void uip_server(uint16_t portno, pthread_startroutine_t handler, int stacksize)
{
struct sockaddr_in myaddr;
#ifdef CONFIG_NET_HAVE_SOLINGER
struct linger ling;
#endif
pthread_t child;
pthread_attr_t attr;
socklen_t addrlen;
int listensd;
int acceptsd;
int ret;
/* Create a new TCP socket to use to listen for connections */
listensd = uip_listenon(portno);
if (listensd < 0)
{
return;
}
/* Begin serving connections */
for (;;)
{
/* Accept the next connectin */
addrlen = sizeof(struct sockaddr_in);
acceptsd = accept(listensd, (struct sockaddr*)&myaddr, &addrlen);
if (acceptsd < 0)
{
ndbg("accept failure: %d\n", errno);
break;
}
nvdbg("Connection accepted -- spawning sd=%d\n", acceptsd);
/* Configure to "linger" until all data is sent when the socket is
* closed.
*/
#ifdef CONFIG_NET_HAVE_SOLINGER
ling.l_onoff = 1;
ling.l_linger = 30; /* timeout is seconds */
ret = setsockopt(acceptsd, SOL_SOCKET, SO_LINGER, &ling, sizeof(struct linger));
if (ret < 0)
{
close(acceptsd);
ndbg("setsockopt SO_LINGER failure: %d\n", errno);
break;
}
#endif
/* Create a thread to handle the connection. The socket descriptor is
* provided in as the single argument to the new thread.
*/
(void)pthread_attr_init(&attr);
(void)pthread_attr_setstacksize(&attr, stacksize);
ret = pthread_create(&child, &attr, handler, (void*)acceptsd);
if (ret != 0)
{
/* Close the connection */
close(acceptsd);
ndbg("pthread_create failed\n");
if (ret == EAGAIN)
{
/* Lacked resources to create a new thread. This is a temporary
* condition, so we close this peer, but keep serving for
* other connections.
*/
continue;
}
/* Something is very wrong... Break out and stop serving */
break;
}
/* We don't care when/how the child thread exits so detach from it now
* in order to avoid memory leaks.
*/
(void)pthread_detach(child);
}
/* Close the listerner socket */
close(listensd);
}
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