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127 lines
4.4 KiB
127 lines
4.4 KiB
/**************************************************************************** |
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* net/uip/uip_tcppoll.c |
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* Poll for the availability of TCP TX data |
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* |
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* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Adapted for NuttX from logic in uIP which also has a BSD-like license: |
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* |
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* Original author Adam Dunkels <adam@dunkels.com> |
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* Copyright () 2001-2003, Adam Dunkels. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote |
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* products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#if defined(CONFIG_NET) && defined(CONFIG_NET_TCP) |
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#include <stdint.h> |
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#include <debug.h> |
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#include <nuttx/net/uip/uipopt.h> |
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#include <nuttx/net/uip/uip.h> |
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#include <nuttx/net/uip/uip-arch.h> |
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#include "uip_internal.h" |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Variables |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Variables |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: uip_tcppoll |
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* |
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* Description: |
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* Poll a TCP connection structure for availability of TX data |
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* |
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* Parameters: |
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* dev - The device driver structure to use in the send operation |
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* conn - The TCP "connection" to poll for TX data |
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* |
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* Return: |
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* None |
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* |
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* Assumptions: |
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* Called from the interrupt level or with interrupts disabled. |
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* |
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****************************************************************************/ |
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void uip_tcppoll(struct uip_driver_s *dev, struct uip_conn *conn) |
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{ |
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uint8_t result; |
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/* Verify that the connection is established */ |
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if ((conn->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED) |
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{ |
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/* Set up for the callback */ |
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dev->d_snddata = &dev->d_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN]; |
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dev->d_appdata = &dev->d_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN]; |
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dev->d_len = 0; |
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dev->d_sndlen = 0; |
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/* Perfom the callback */ |
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result = uip_tcpcallback(dev, conn, UIP_POLL); |
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/* Handle the callback response */ |
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uip_tcpappsend(dev, conn, result); |
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} |
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else |
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{ |
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/* Nothing to do for this connection */ |
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dev->d_len = 0; |
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} |
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} |
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#endif /* CONFIG_NET && CONFIG_NET_TCP */
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