/****************************************************************************
* net/uip/uip-listen.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* A direct leverage of logic from uIP which also has b BSD style license
*
* Author: Adam Dunkels <adam@dunkels.com>
* Copyright (c) 2001-2003, Adam Dunkels.
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
#ifdef CONFIG_NET
#include <sys/types.h>
#include <net/uip/uipopt.h>
#include "uip-internal.h"
/****************************************************************************
* Private Data
****************************************************************************/
/* The uip_listenports list all currently listening ports. */
static uint16 uip_listenports[UIP_LISTENPORTS];
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: uip_listeninit
*
* Description:
* Setup the listening data structures
*
* Assumptions:
* Called early in the inialization phase while the system is still
* single-threaded.
*
****************************************************************************/
void uip_listeninit(void)
{
int ndx;
for (ndx = 0; ndx < UIP_LISTENPORTS; ndx++)
{
uip_listenports[ndx] = 0;
}
}
/****************************************************************************
* Function: uip_unlisten
*
* Description:
* Stop listening on a port
*
* Assumptions:
* Called from normal user code.
*
****************************************************************************/
int uip_unlisten(uint16 port)
{
irqstate_t flags;
int ndx;
int ret = -EINVAL;
flags = irqsave();
for (ndx = 0; ndx < UIP_LISTENPORTS; ndx++)
{
if (uip_listenports[ndx] == port)
{
uip_listenports[ndx] = 0;
ret = OK;
break;
}
}
irqrestore(flags);
return ret;
}
/****************************************************************************
* Function: uip_listen
*
* Description:
* Start listening on a port
*
* Assumptions:
* Called from normal user code.
*
****************************************************************************/
int uip_listen(uint16 port)
{
irqstate_t flags;
int ndx;
int ret = -ENOBUFS;
flags = irqsave();
for (ndx = 0; ndx < UIP_LISTENPORTS; ndx++)
{
if (uip_listenports[ndx] == 0)
{
uip_listenports[ndx] = port;
ret = OK;
break;
}
}
irqrestore(flags);
return ret;
}
/****************************************************************************
* Function: uip_islistener
*
* Description:
* Return TRUE is there is a listener for the specified port
*
* Assumptions:
* Called at interrupt level
*
****************************************************************************/
boolean uip_islistener(uint16 portno)
{
int ndx;
for (ndx = 0; ndx < UIP_LISTENPORTS; ndx++)
{
if (uip_listenports[ndx] == portno)
{
return TRUE;
}
}
return FALSE;
}
/****************************************************************************
* Function: uip_accept
*
* Description:
* Accept the new connection for the specified listening port.
*
* Assumptions:
* Called at interrupt level
*
****************************************************************************/
int uip_accept(struct uip_conn *conn, uint16 portno)
{
struct uip_conn *listener;
int ret = ERROR;
/* The interrupt logic has already allocated and initialized a TCP
* connection -- now check if is an application in place to accept the
* connection.
*/
listener = uip_tcplistener(portno);
if (listener && listener->accept)
{
/* Yes.. accept the connection */
ret = listener->accept(listener->accept_private, conn);
}
return ret;
}
#endif /* CONFIG_NET */
