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-rw-r--r--nuttx/net/uip/uip_udppoll.c126
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diff --git a/nuttx/net/uip/uip_udppoll.c b/nuttx/net/uip/uip_udppoll.c
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-/****************************************************************************
- * net/uip/uip_udppoll.c
- * Poll for the availability of UDP TX data
- *
- * Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * 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_UDP)
-
-#include <debug.h>
-
-#include <nuttx/net/uip/uipopt.h>
-#include <nuttx/net/uip/uip.h>
-#include <nuttx/net/uip/uip-arch.h>
-
-#include "uip_internal.h"
-
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Public Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: uip_udppoll
- *
- * Description:
- * Poll a UDP "connection" structure for availability of TX data
- *
- * Parameters:
- * dev - The device driver structure to use in the send operation
- * conn - The UDP "connection" to poll for TX data
- *
- * Return:
- * None
- *
- * Assumptions:
- * Called from the interrupt level or with interrupts disabled.
- *
- ****************************************************************************/
-
-void uip_udppoll(struct uip_driver_s *dev, struct uip_udp_conn *conn)
-{
- /* Verify that the UDP connection is valid */
-
- if (conn->lport != 0)
- {
- /* Setup for the application callback */
-
- dev->d_appdata = &dev->d_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
- dev->d_snddata = &dev->d_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
-
- dev->d_len = 0;
- dev->d_sndlen = 0;
-
- /* Perform the application callback */
-
- uip_udpcallback(dev, conn, UIP_POLL);
-
- /* If the application has data to send, setup the UDP/IP header */
-
- if (dev->d_sndlen > 0)
- {
- uip_udpsend(dev, conn);
- return;
- }
- }
-
- /* Make sure that d_len is zero meaning that there is nothing to be sent */
-
- dev->d_len = 0;
-}
-
-#endif /* CONFIG_NET && CONFIG_NET_UDP */