forked from Archive/PX4-Autopilot
128 lines
4.4 KiB
C
128 lines
4.4 KiB
C
/****************************************************************************
|
|
* net/uip/uip_tcppoll.c
|
|
* Poll for the availability of TCP TX data
|
|
*
|
|
* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* Adapted for NuttX from logic in uIP which also has a BSD-like license:
|
|
*
|
|
* Original author Adam Dunkels <adam@dunkels.com>
|
|
* Copyright () 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>
|
|
#if defined(CONFIG_NET) && defined(CONFIG_NET_TCP)
|
|
|
|
#include <stdint.h>
|
|
#include <debug.h>
|
|
|
|
#include <net/uip/uipopt.h>
|
|
#include <net/uip/uip.h>
|
|
#include <net/uip/uip-arch.h>
|
|
|
|
#include "uip_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Variables
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Variables
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: uip_tcppoll
|
|
*
|
|
* Description:
|
|
* Poll a TCP connection structure for availability of TX data
|
|
*
|
|
* Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The TCP "connection" to poll for TX data
|
|
*
|
|
* Return:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from the interrupt level or with interrupts disabled.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void uip_tcppoll(struct uip_driver_s *dev, struct uip_conn *conn)
|
|
{
|
|
uint8_t result;
|
|
|
|
/* Verify that the connection is established */
|
|
|
|
if ((conn->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED)
|
|
{
|
|
/* Set up for the callback */
|
|
|
|
dev->d_snddata = &dev->d_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN];
|
|
dev->d_appdata = &dev->d_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN];
|
|
|
|
dev->d_len = 0;
|
|
dev->d_sndlen = 0;
|
|
|
|
/* Perfom the callback */
|
|
|
|
result = uip_tcpcallback(dev, conn, UIP_POLL);
|
|
|
|
/* Handle the callback response */
|
|
|
|
uip_tcpappsend(dev, conn, result);
|
|
}
|
|
else
|
|
{
|
|
/* Nothing to do for this connection */
|
|
|
|
dev->d_len = 0;
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_NET && CONFIG_NET_TCP */
|