313 lines
10 KiB
C
313 lines
10 KiB
C
/****************************************************************************
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* net/uip/uip_poll.c
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*
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* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 <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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* Function: uip_polludpconnections
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*
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* Description:
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* Poll all UDP connections for available packets to send.
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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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#if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING)
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static inline int uip_pollicmp(struct uip_driver_s *dev, uip_poll_callback_t callback)
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{
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/* Perform the UDP TX poll */
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uip_icmppoll(dev);
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/* Call back into the driver */
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return callback(dev);
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}
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#endif /* CONFIG_NET_UDP */
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/****************************************************************************
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* Function: uip_polludpconnections
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*
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* Description:
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* Poll all UDP connections for available packets to send.
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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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#ifdef CONFIG_NET_UDP
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static int uip_polludpconnections(struct uip_driver_s *dev,
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uip_poll_callback_t callback)
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{
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struct uip_udp_conn *udp_conn = NULL;
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int bstop = 0;
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/* Traverse all of the allocated UDP connections and perform the poll action */
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while (!bstop && (udp_conn = uip_nextudpconn(udp_conn)))
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{
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/* Perform the UDP TX poll */
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uip_udppoll(dev, udp_conn);
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/* Call back into the driver */
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bstop = callback(dev);
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}
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return bstop;
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}
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#endif /* CONFIG_NET_UDP */
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/****************************************************************************
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* Function: uip_polltcpconnections
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*
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* Description:
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* Poll all UDP connections for available packets to send.
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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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#ifdef CONFIG_NET_TCP
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static inline int uip_polltcpconnections(struct uip_driver_s *dev,
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uip_poll_callback_t callback)
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{
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struct uip_conn *conn = NULL;
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int bstop = 0;
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/* Traverse all of the active TCP connections and perform the poll action */
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while (!bstop && (conn = uip_nexttcpconn(conn)))
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{
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/* Perform the TCP TX poll */
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uip_tcppoll(dev, conn);
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/* Call back into the driver */
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bstop = callback(dev);
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}
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return bstop;
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}
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#else
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# define uip_polltcpconnections(dev, callback) (0)
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#endif
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/****************************************************************************
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* Function: uip_polltcptimer
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*
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* Description:
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* The TCP timer has expired. Update TCP timing state in each active,
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* TCP connection.
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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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#ifdef CONFIG_NET_TCP
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static inline int uip_polltcptimer(struct uip_driver_s *dev,
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uip_poll_callback_t callback, int hsec)
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{
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struct uip_conn *conn = NULL;
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int bstop = 0;
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/* Traverse all of the active TCP connections and perform the poll action */
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while (!bstop && (conn = uip_nexttcpconn(conn)))
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{
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/* Perform the TCP timer poll */
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uip_tcptimer(dev, conn, hsec);
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/* Call back into the driver */
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bstop = callback(dev);
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}
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return bstop;
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}
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#else
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# define uip_polltcptimer(dev, callback, hsec) (0)
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#endif
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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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* will perform TCP and UDP polling operations. uip_poll() may be called
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* asychronously with the network drvier can accept another outgoing packet.
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*
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* This function will call the provided callback function for every active
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* connection. Polling will continue until all connections have been polled
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* or until the user-suplied function returns a non-zero value (which it
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* should do only if it cannot accept further write 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 then send
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* 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)
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{
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int bstop;
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/* Traverse all of the active TCP connections and perform the poll action */
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bstop = uip_polltcpconnections(dev, callback);
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if (!bstop)
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{
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#ifdef CONFIG_NET_UDP
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/* Traverse all of the allocated UDP connections and perform the poll action */
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bstop = uip_polludpconnections(dev, callback);
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if (!bstop)
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#endif
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{
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#if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING)
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/* Traverse all of the tasks waiting to send an ICMP ECHO request */
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bstop = uip_pollicmp(dev, callback);
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#endif
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}
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}
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return bstop;
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}
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/****************************************************************************
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* Function: uip_timer
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*
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* Description:
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* These function will traverse each active uIP connection structure and
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* perform TCP timer operations (and UDP polling operations). The CAN
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* driver MUST implement logic to periodically call uip_timer().
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*
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* This function will call the provided callback function for every active
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* connection. Polling will continue until all connections have been polled
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* or until the user-suplied function returns a non-zero value (which it
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* should do only if it cannot accept further write 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 then send
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* 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_timer(struct uip_driver_s *dev, uip_poll_callback_t callback, int hsec)
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{
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int bstop;
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/* Increment the timer used by the IP reassembly logic */
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#if UIP_REASSEMBLY
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if (uip_reasstmr != 0 && uip_reasstmr < UIP_REASS_MAXAGE)
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{
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uip_reasstmr += hsec;
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}
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#endif /* UIP_REASSEMBLY */
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/* Traverse all of the active TCP connections and perform the timer action */
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bstop = uip_polltcptimer(dev, callback, hsec);
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if (!bstop)
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{
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/* Traverse all of the allocated UDP connections and perform the poll action */
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#ifdef CONFIG_NET_UDP
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bstop = uip_polludpconnections(dev, callback);
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if (!bstop)
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#endif
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{
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#if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING)
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/* Traverse all of the tasks waiting to send an ICMP ECHO request */
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bstop = uip_pollicmp(dev, callback);
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#endif
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}
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}
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return bstop;
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}
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#endif /* CONFIG_NET */
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