566 lines
16 KiB
C
566 lines
16 KiB
C
/****************************************************************************
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* net/devif/devif_poll.c
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*
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* Copyright (C) 2007-2010, 2012, 2014, 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 <nuttx/clock.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/net.h>
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#include "devif/devif.h"
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#include "arp/arp.h"
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#include "neighbor/neighbor.h"
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#include "tcp/tcp.h"
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#include "udp/udp.h"
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#include "pkt/pkt.h"
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#include "icmp/icmp.h"
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#include "icmpv6/icmpv6.h"
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#include "igmp/igmp.h"
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#include "sixlowpan/sixlowpan.h"
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* Time of last poll */
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systime_t g_polltime;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Function: devif_packet_conversion
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*
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* Description:
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* TCP output comes through three different mechansims. Either from:
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*
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* 1. TCP socket output. For the case of TCP output to an
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* IEEE802.15.4, the TCP output is caught in the socket
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* send()/sendto() logic and and redirected to 6loWPAN logic.
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* 2. TCP output from the TCP state machine. That will occur
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* during TCP packet processing by the TCP state meachine.
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* 3. TCP output resulting from TX or timer polling
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*
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* Cases 2 is handled here. Logic here detected if (1) an attempt
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* to return with d_len > 0 and (2) that the device is an
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* IEEE802.15.4 MAC network driver. Under those conditions, 6loWPAN
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* logic will be called to create the IEEE80215.4 frames.
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*
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* Assumptions:
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* The network is locked.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_6LOWPAN
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static inline void devif_packet_conversion(FAR struct net_driver_s *dev)
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{
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#ifdef CONFIG_NET_MULTILINK
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/* Handle the case where multiple link layer protocols are supported */
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if (dev->d_len > 0 && dev->d_lltype == NET_LL_IEEE802154)
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#else
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if (dev->d_len > 0)
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#endif
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{
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/* Let 6loWPAN convert output into the IEEE802.15.4 frames */
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sixlowpan_tcp_send(dev);
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dev->d_len = 0;
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}
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}
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#else
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# define devif_packet_conversion(dev)
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#endif /* CONFIG_NET_6LOWPAN */
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/****************************************************************************
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* Function: devif_poll_pkt_connections
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*
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* Description:
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* Poll all packet 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 MAC device driver and may be called
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* from the timer interrupt/watchdog handle level.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_PKT
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static int devif_poll_pkt_connections(FAR struct net_driver_s *dev,
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devif_poll_callback_t callback)
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{
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FAR struct pkt_conn_s *pkt_conn = NULL;
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int bstop = 0;
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/* Traverse all of the allocated packet connections and perform the poll action */
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while (!bstop && (pkt_conn = pkt_nextconn(pkt_conn)))
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{
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/* Perform the packet TX poll */
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pkt_poll(dev, pkt_conn);
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/* Perform any necessary conversions on outgoing packets */
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devif_packet_conversion(dev);
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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_PKT */
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/****************************************************************************
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* Function: devif_poll_icmp
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*
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* Description:
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* Poll all of the connections waiting to send an ICMP ECHO request
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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 devif_poll_icmp(FAR struct net_driver_s *dev,
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devif_poll_callback_t callback)
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{
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/* Perform the ICMP poll */
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icmp_poll(dev);
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/* Perform any necessary conversions on outgoing packets */
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devif_packet_conversion(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_ICMP && CONFIG_NET_ICMP_PING */
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/****************************************************************************
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* Function: devif_poll_icmpv6
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*
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* Description:
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* Poll all of the connections waiting to send an ICMPv6 ECHO request
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*
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****************************************************************************/
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#if defined(CONFIG_NET_ICMPv6_PING) || defined(CONFIG_NET_ICMPv6_NEIGHBOR)
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static inline int devif_poll_icmpv6(FAR struct net_driver_s *dev,
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devif_poll_callback_t callback)
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{
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/* Perform the ICMPv6 poll */
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icmpv6_poll(dev);
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/* Perform any necessary conversions on outgoing packets */
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devif_packet_conversion(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_ICMPv6_PING || CONFIG_NET_ICMPv6_NEIGHBOR*/
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/****************************************************************************
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* Function: devif_poll_igmp
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*
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* Description:
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* Poll all IGMP 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 MAC device driver and may be called
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* from the timer interrupt/watchdog handle level.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IGMP
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static inline int devif_poll_igmp(FAR struct net_driver_s *dev,
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devif_poll_callback_t callback)
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{
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/* Perform the IGMP TX poll */
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igmp_poll(dev);
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/* Perform any necessary conversions on outgoing packets */
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devif_packet_conversion(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_IGMP */
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/****************************************************************************
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* Function: devif_poll_udp_connections
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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 MAC device driver and may be called
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* from the timer interrupt/watchdog handle level.
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*
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****************************************************************************/
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#ifdef NET_UDP_HAVE_STACK
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static int devif_poll_udp_connections(FAR struct net_driver_s *dev,
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devif_poll_callback_t callback)
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{
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FAR struct udp_conn_s *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 && (conn = udp_nextconn(conn)))
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{
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/* Perform the UDP TX poll */
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udp_poll(dev, conn);
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/* Perform any necessary conversions on outgoing packets */
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devif_packet_conversion(dev);
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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 /* NET_UDP_HAVE_STACK */
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/****************************************************************************
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* Function: devif_poll_tcp_connections
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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 MAC device driver and may be called
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* from the timer interrupt/watchdog handle level.
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*
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****************************************************************************/
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#ifdef NET_TCP_HAVE_STACK
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static inline int devif_poll_tcp_connections(FAR struct net_driver_s *dev,
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devif_poll_callback_t callback)
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{
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FAR struct tcp_conn_s *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 = tcp_nextconn(conn)))
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{
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/* Perform the TCP TX poll */
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tcp_poll(dev, conn);
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/* Perform any necessary conversions on outgoing packets */
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devif_packet_conversion(dev);
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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 devif_poll_tcp_connections(dev, callback) (0)
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#endif
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/****************************************************************************
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* Function: devif_poll_tcp_timer
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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 MAC device driver and may be called
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* from the timer interrupt/watchdog handle level.
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*
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****************************************************************************/
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#ifdef NET_TCP_HAVE_STACK
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static inline int devif_poll_tcp_timer(FAR struct net_driver_s *dev,
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devif_poll_callback_t callback,
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int hsec)
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{
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FAR struct tcp_conn_s *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 = tcp_nextconn(conn)))
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{
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/* Perform the TCP timer poll */
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tcp_timer(dev, conn, hsec);
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/* Perform any necessary conversions on outgoing packets */
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devif_packet_conversion(dev);
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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 devif_poll_tcp_timer(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: devif_poll
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*
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* Description:
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* This function will traverse each active network connection structure and
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* will perform network polling operations. devif_poll() may be called
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* asynchronously with the network driver can accept another outgoing
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* 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-supplied 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 device 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 MAC device driver and may be called
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* from the timer interrupt/watchdog handle level.
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*
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****************************************************************************/
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int devif_poll(FAR struct net_driver_s *dev, devif_poll_callback_t callback)
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{
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int bstop = false;
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/* Traverse all of the active packet connections and perform the poll
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* action.
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*/
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#ifdef CONFIG_NET_ARP_SEND
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/* Check for pending ARP requests */
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bstop = arp_poll(dev, callback);
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if (!bstop)
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#endif
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#ifdef CONFIG_NET_PKT
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{
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/* Check for pending packet socket transfer */
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bstop = devif_poll_pkt_connections(dev, callback);
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}
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if (!bstop)
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#endif
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#ifdef CONFIG_NET_IGMP
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{
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/* Check for pending IGMP messages */
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bstop = devif_poll_igmp(dev, callback);
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}
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if (!bstop)
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#endif
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#ifdef NET_TCP_HAVE_STACK
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{
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/* Traverse all of the active TCP connections and perform the poll
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* action.
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*/
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bstop = devif_poll_tcp_connections(dev, callback);
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}
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if (!bstop)
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#endif
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#ifdef NET_UDP_HAVE_STACK
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{
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/* Traverse all of the allocated UDP connections and perform
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* the poll action
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*/
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bstop = devif_poll_udp_connections(dev, callback);
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}
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if (!bstop)
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#endif
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#if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING)
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{
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/* Traverse all of the tasks waiting to send an ICMP ECHO request. */
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bstop = devif_poll_icmp(dev, callback);
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}
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if (!bstop)
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#endif
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#if defined(CONFIG_NET_ICMPv6_PING) || defined(CONFIG_NET_ICMPv6_NEIGHBOR)
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{
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/* Traverse all of the tasks waiting to send an ICMPv6 ECHO request. */
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bstop = devif_poll_icmpv6(dev, callback);
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}
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if (!bstop)
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#endif
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{
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/* Nothing more to do */
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}
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return bstop;
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}
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/****************************************************************************
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* Function: devif_timer
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*
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* Description:
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* These function will traverse each active network connection structure and
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* perform network timer operations. The Ethernet driver MUST implement
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* logic to periodically call devif_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-supplied 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 device 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 MAC 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 devif_timer(FAR struct net_driver_s *dev, devif_poll_callback_t callback)
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{
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systime_t now;
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systime_t elapsed;
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int bstop = false;
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/* Get the elapsed time since the last poll in units of half seconds
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* (truncating).
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*/
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now = clock_systimer();
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elapsed = now - g_polltime;
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/* Process time-related events only when more than one half second elapses. */
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if (elapsed >= TICK_PER_HSEC)
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{
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/* Calculate the elpased time in units of half seconds (truncating to
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* number of whole half seconds).
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*/
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int hsec = (int)(elapsed / TICK_PER_HSEC);
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/* Update the current poll time (truncating to the last half second
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* boundary to avoid error build-up).
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*/
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g_polltime += (TICK_PER_HSEC * (systime_t)hsec);
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/* Perform periodic activitives that depend on hsec > 0 */
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#if defined(CONFIG_NET_TCP_REASSEMBLY) && defined(CONFIG_NET_IPv4)
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/* Increment the timer used by the IP reassembly logic */
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if (g_reassembly_timer != 0 &&
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g_reassembly_timer < CONFIG_NET_TCP_REASS_MAXAGE)
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{
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g_reassembly_timer += hsec;
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}
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#endif
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#ifdef CONFIG_NET_IPv6
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/* Perform aging on the entries in the Neighbor Table */
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neighbor_periodic(hsec);
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#endif
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#ifdef NET_TCP_HAVE_STACK
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/* Traverse all of the active TCP connections and perform the
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* timer action.
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*/
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bstop = devif_poll_tcp_timer(dev, callback, hsec);
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#endif
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}
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/* If possible, continue with a normal poll checking for pending
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* network driver actions.
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*/
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if (!bstop)
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{
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bstop = devif_poll(dev, callback);
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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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