81d093e29e
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@374 42af7a65-404d-4744-a932-0658087f49c3
139 lines
4.9 KiB
C
139 lines
4.9 KiB
C
/****************************************************************************
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* net/uip/uip-poll.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* 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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#ifdef CONFIG_NET
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#include <sys/types.h>
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#include <debug.h>
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#include <net/uip/uipopt.h>
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#include <net/uip/uip.h>
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#include <net/uip/uip-arch.h>
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#include "uip-internal.h"
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/****************************************************************************
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* Private Data
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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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* Function: uip_poll
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*
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* Description:
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* This function will traverse each active uIP connection structure and
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* perform uip_interrupt with the specified event. After each polling each
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* active uIP connection structure, this function will call the provided
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* callback function if the poll resulted in new data to be send. The poll
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* will continue until all connections have been polled or until the user-
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* suplied function returns a non-zero value (which is would do only if
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* it cannot accept further write data).
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*
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* This function should be called periodically with event == UIP_DRV_TIMER
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* to perform period TCP processing. This function may also be called
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* with UIP_DRV_POLL obtain queue TX data.
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*
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* When the callback function is called, there may be an outbound packet
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* waiting for service in the uIP packet buffer, and if so the d_len field
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* is set to a value larger than zero. The device driver should be called to
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* send out the packet.
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*
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* Assumptions:
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* This function is called from the CAN device driver and may be called from
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* the timer interrupt/watchdog handle level.
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*
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****************************************************************************/
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int uip_poll(struct uip_driver_s *dev, uip_poll_callback_t callback, int event)
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{
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struct uip_conn *conn;
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#ifdef CONFIG_NET_UDP
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struct uip_udp_conn *udp_conn;
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#endif
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irqstate_t flags;
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/* Interrupts must be disabled while traversing the active connection list */
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flags = irqsave();
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/* Traverse all of the active TCP connections and perform the poll action */
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conn = NULL;
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while ((conn = uip_nexttcpconn(conn)))
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{
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uip_conn = conn;
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uip_interrupt(dev, event);
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if (callback(dev))
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{
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irqrestore(flags);
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return 1;
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}
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}
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uip_conn = NULL;
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#ifdef CONFIG_NET_UDP
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/* Traverse all of the allocated UDP connections and perform a poll action */
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udp_conn = NULL;
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while ((udp_conn = uip_nextudpconn(udp_conn)))
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{
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uip_udppoll(dev, udp_conn);
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if (callback(dev))
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{
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irqrestore(flags);
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return 1;
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}
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}
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#endif /* CONFIG_NET_UDP */
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irqrestore(flags);
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return 0;
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}
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#endif /* CONFIG_NET */
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