kopia lustrzana https://github.com/espressif/esp-idf
615 wiersze
15 KiB
C
615 wiersze
15 KiB
C
![]() |
/**
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* @file
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* Stack-internal timers implementation.
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* This file includes timer callbacks for stack-internal timers as well as
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* functions to set up or stop timers and check for expired timers.
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*
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*/
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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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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 modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* 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 products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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* Simon Goldschmidt
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*
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*/
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#include "lwip/opt.h"
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#include "lwip/timers.h"
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#include "lwip/priv/tcp_priv.h"
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#if LWIP_TIMERS
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#include "lwip/def.h"
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#include "lwip/memp.h"
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#include "lwip/priv/tcpip_priv.h"
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#include "lwip/ip_frag.h"
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#include "netif/etharp.h"
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#include "lwip/dhcp.h"
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#include "lwip/autoip.h"
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#include "lwip/igmp.h"
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#include "lwip/dns.h"
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#include "lwip/nd6.h"
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#include "lwip/ip6_frag.h"
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#include "lwip/mld6.h"
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#include "lwip/sys.h"
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#include "lwip/pbuf.h"
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#ifdef MEMLEAK_DEBUG
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static const char mem_debug_file[] ICACHE_RODATA_ATTR STORE_ATTR = __FILE__;
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#endif
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/** The one and only timeout list */
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static struct sys_timeo *next_timeout;
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#if NO_SYS
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static u32_t timeouts_last_time;
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#endif /* NO_SYS */
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#if LWIP_TCP
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/** global variable that shows if the tcp timer is currently scheduled or not */
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static int tcpip_tcp_timer_active;
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/**
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* Timer callback function that calls tcp_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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tcpip_tcp_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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/* call TCP timer handler */
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tcp_tmr();
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/* timer still needed? */
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if (tcp_active_pcbs || tcp_tw_pcbs) {
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/* restart timer */
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sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
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} else {
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/* disable timer */
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tcpip_tcp_timer_active = 0;
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}
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}
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/**
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* Called from TCP_REG when registering a new PCB:
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* the reason is to have the TCP timer only running when
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* there are active (or time-wait) PCBs.
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*/
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void
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tcp_timer_needed(void)
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{
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/* timer is off but needed again? */
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if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
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/* enable and start timer */
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tcpip_tcp_timer_active = 1;
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sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
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}
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}
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#endif /* LWIP_TCP */
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#if LWIP_IPV4
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#if IP_REASSEMBLY
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/**
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* Timer callback function that calls ip_reass_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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ip_reass_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: ip_reass_tmr()\n"));
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ip_reass_tmr();
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sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
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}
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#endif /* IP_REASSEMBLY */
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#if LWIP_ARP
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/**
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* Timer callback function that calls etharp_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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arp_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: etharp_tmr()\n"));
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etharp_tmr();
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sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
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}
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#endif /* LWIP_ARP */
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#if LWIP_DHCP
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/**
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* Timer callback function that calls dhcp_coarse_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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dhcp_timer_coarse(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dhcp_coarse_tmr()\n"));
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dhcp_coarse_tmr();
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#ifdef LWIP_ESP8266
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extern void dhcps_coarse_tmr(void);
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dhcps_coarse_tmr();
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#endif
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sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
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}
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/**
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* Timer callback function that calls dhcp_fine_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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dhcp_timer_fine(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dhcp_fine_tmr()\n"));
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dhcp_fine_tmr();
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sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
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}
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#endif /* LWIP_DHCP */
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#if LWIP_AUTOIP
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/**
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* Timer callback function that calls autoip_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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autoip_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: autoip_tmr()\n"));
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autoip_tmr();
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sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
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}
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#endif /* LWIP_AUTOIP */
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#if LWIP_IGMP
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/**
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* Timer callback function that calls igmp_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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igmp_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: igmp_tmr()\n"));
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igmp_tmr();
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sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
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}
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#endif /* LWIP_IGMP */
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#endif /* LWIP_IPV4 */
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#if LWIP_DNS
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/**
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* Timer callback function that calls dns_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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dns_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: dns_tmr()\n"));
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dns_tmr();
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sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
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}
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#endif /* LWIP_DNS */
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#if LWIP_IPV6
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/**
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* Timer callback function that calls nd6_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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nd6_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: nd6_tmr()\n"));
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nd6_tmr();
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sys_timeout(ND6_TMR_INTERVAL, nd6_timer, NULL);
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}
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#if LWIP_IPV6_REASS
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/**
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* Timer callback function that calls ip6_reass_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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ip6_reass_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: ip6_reass_tmr()\n"));
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ip6_reass_tmr();
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sys_timeout(IP6_REASS_TMR_INTERVAL, ip6_reass_timer, NULL);
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}
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#endif /* LWIP_IPV6_REASS */
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#if LWIP_IPV6_MLD
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/**
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* Timer callback function that calls mld6_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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mld6_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: mld6_tmr()\n"));
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mld6_tmr();
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sys_timeout(MLD6_TMR_INTERVAL, mld6_timer, NULL);
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}
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#endif /* LWIP_IPV6_MLD */
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#endif /* LWIP_IPV6 */
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/** Initialize this module */
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void sys_timeouts_init(void)
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{
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#if LWIP_IPV4
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#if IP_REASSEMBLY
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sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
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#endif /* IP_REASSEMBLY */
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#if LWIP_ARP
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sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
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#endif /* LWIP_ARP */
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#if LWIP_DHCP
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#ifdef LWIP_ESP8266
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// DHCP_MAXRTX = 0;
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#endif
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sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
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sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
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#endif /* LWIP_DHCP */
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#if LWIP_AUTOIP
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sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
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#endif /* LWIP_AUTOIP */
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#if LWIP_IGMP
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sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
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#endif /* LWIP_IGMP */
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#endif /* LWIP_IPV4 */
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#if LWIP_DNS
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sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
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#endif /* LWIP_DNS */
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#if LWIP_IPV6
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sys_timeout(ND6_TMR_INTERVAL, nd6_timer, NULL);
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#if LWIP_IPV6_REASS
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sys_timeout(IP6_REASS_TMR_INTERVAL, ip6_reass_timer, NULL);
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#endif /* LWIP_IPV6_REASS */
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#if LWIP_IPV6_MLD
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sys_timeout(MLD6_TMR_INTERVAL, mld6_timer, NULL);
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#endif /* LWIP_IPV6_MLD */
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#endif /* LWIP_IPV6 */
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#if NO_SYS
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/* Initialise timestamp for sys_check_timeouts */
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timeouts_last_time = sys_now();
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#endif
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}
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/**
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* Create a one-shot timer (aka timeout). Timeouts are processed in the
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* following cases:
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* - while waiting for a message using sys_timeouts_mbox_fetch()
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* - by calling sys_check_timeouts() (NO_SYS==1 only)
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*
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* @param msecs time in milliseconds after that the timer should expire
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* @param handler callback function to call when msecs have elapsed
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* @param arg argument to pass to the callback function
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*/
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#if LWIP_DEBUG_TIMERNAMES
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void
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sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char* handler_name)
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#else /* LWIP_DEBUG_TIMERNAMES */
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#ifdef LWIP_ESP8266
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u32_t LwipTimOutLim = 0; // For light sleep. time out. limit is 3000ms
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#endif
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void
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sys_timeout(u32_t msecs, sys_timeout_handler handler, void *arg)
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#endif /* LWIP_DEBUG_TIMERNAMES */
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{
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struct sys_timeo *timeout, *t;
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#if NO_SYS
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u32_t now, diff;
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#endif
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timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT);
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if (timeout == NULL) {
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LWIP_ASSERT("sys_timeout: timeout != NULL, pool MEMP_SYS_TIMEOUT is empty", timeout != NULL);
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return;
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}
|
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|
|
||
|
#if NO_SYS
|
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now = sys_now();
|
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if (next_timeout == NULL) {
|
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diff = 0;
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timeouts_last_time = now;
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} else {
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diff = now - timeouts_last_time;
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}
|
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|
#endif
|
||
|
|
||
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timeout->next = NULL;
|
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timeout->h = handler;
|
||
|
timeout->arg = arg;
|
||
|
|
||
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#ifdef LWIP_ESP8266
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if(msecs < LwipTimOutLim)
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msecs = LwipTimOutLim;
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#endif
|
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|
|
||
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#if NO_SYS
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timeout->time = msecs + diff;
|
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#else
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timeout->time = msecs;
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#endif
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#if LWIP_DEBUG_TIMERNAMES
|
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timeout->handler_name = handler_name;
|
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LWIP_DEBUGF(TIMERS_DEBUG, ("sys_timeout: %p msecs=%"U32_F" handler=%s arg=%p\n",
|
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|
(void *)timeout, msecs, handler_name, (void *)arg));
|
||
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#endif /* LWIP_DEBUG_TIMERNAMES */
|
||
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|
||
|
if (next_timeout == NULL) {
|
||
|
next_timeout = timeout;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (next_timeout->time > msecs) {
|
||
|
next_timeout->time -= msecs;
|
||
|
timeout->next = next_timeout;
|
||
|
next_timeout = timeout;
|
||
|
} else {
|
||
|
for (t = next_timeout; t != NULL; t = t->next) {
|
||
|
timeout->time -= t->time;
|
||
|
if (t->next == NULL || t->next->time > timeout->time) {
|
||
|
if (t->next != NULL) {
|
||
|
t->next->time -= timeout->time;
|
||
|
}
|
||
|
timeout->next = t->next;
|
||
|
t->next = timeout;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Go through timeout list (for this task only) and remove the first matching
|
||
|
* entry (subsequent entries remain untouched), even though the timeout has not
|
||
|
* triggered yet.
|
||
|
*
|
||
|
* @param handler callback function that would be called by the timeout
|
||
|
* @param arg callback argument that would be passed to handler
|
||
|
*/
|
||
|
void
|
||
|
sys_untimeout(sys_timeout_handler handler, void *arg)
|
||
|
{
|
||
|
struct sys_timeo *prev_t, *t;
|
||
|
|
||
|
if (next_timeout == NULL) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
for (t = next_timeout, prev_t = NULL; t != NULL; prev_t = t, t = t->next) {
|
||
|
if ((t->h == handler) && (t->arg == arg)) {
|
||
|
/* We have a match */
|
||
|
/* Unlink from previous in list */
|
||
|
if (prev_t == NULL) {
|
||
|
next_timeout = t->next;
|
||
|
} else {
|
||
|
prev_t->next = t->next;
|
||
|
}
|
||
|
/* If not the last one, add time of this one back to next */
|
||
|
if (t->next != NULL) {
|
||
|
t->next->time += t->time;
|
||
|
}
|
||
|
memp_free(MEMP_SYS_TIMEOUT, t);
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
#if NO_SYS
|
||
|
|
||
|
/** Handle timeouts for NO_SYS==1 (i.e. without using
|
||
|
* tcpip_thread/sys_timeouts_mbox_fetch(). Uses sys_now() to call timeout
|
||
|
* handler functions when timeouts expire.
|
||
|
*
|
||
|
* Must be called periodically from your main loop.
|
||
|
*/
|
||
|
void
|
||
|
sys_check_timeouts(void)
|
||
|
{
|
||
|
if (next_timeout) {
|
||
|
struct sys_timeo *tmptimeout;
|
||
|
u32_t diff;
|
||
|
sys_timeout_handler handler;
|
||
|
void *arg;
|
||
|
u8_t had_one;
|
||
|
u32_t now;
|
||
|
|
||
|
now = sys_now();
|
||
|
/* this cares for wraparounds */
|
||
|
diff = now - timeouts_last_time;
|
||
|
do {
|
||
|
#if PBUF_POOL_FREE_OOSEQ
|
||
|
PBUF_CHECK_FREE_OOSEQ();
|
||
|
#endif /* PBUF_POOL_FREE_OOSEQ */
|
||
|
had_one = 0;
|
||
|
tmptimeout = next_timeout;
|
||
|
if (tmptimeout && (tmptimeout->time <= diff)) {
|
||
|
/* timeout has expired */
|
||
|
had_one = 1;
|
||
|
timeouts_last_time += tmptimeout->time;
|
||
|
diff -= tmptimeout->time;
|
||
|
next_timeout = tmptimeout->next;
|
||
|
handler = tmptimeout->h;
|
||
|
arg = tmptimeout->arg;
|
||
|
#if LWIP_DEBUG_TIMERNAMES
|
||
|
if (handler != NULL) {
|
||
|
LWIP_DEBUGF(TIMERS_DEBUG, ("sct calling h=%s arg=%p\n",
|
||
|
tmptimeout->handler_name, arg));
|
||
|
}
|
||
|
#endif /* LWIP_DEBUG_TIMERNAMES */
|
||
|
memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
|
||
|
if (handler != NULL) {
|
||
|
handler(arg);
|
||
|
}
|
||
|
}
|
||
|
/* repeat until all expired timers have been called */
|
||
|
} while (had_one);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/** Set back the timestamp of the last call to sys_check_timeouts()
|
||
|
* This is necessary if sys_check_timeouts() hasn't been called for a long
|
||
|
* time (e.g. while saving energy) to prevent all timer functions of that
|
||
|
* period being called.
|
||
|
*/
|
||
|
void
|
||
|
sys_restart_timeouts(void)
|
||
|
{
|
||
|
timeouts_last_time = sys_now();
|
||
|
}
|
||
|
|
||
|
/** Return the time left before the next timeout is due. If no timeouts are
|
||
|
* enqueued, returns 0xffffffff
|
||
|
*/
|
||
|
u32_t
|
||
|
sys_timeouts_sleeptime(void)
|
||
|
{
|
||
|
u32_t diff;
|
||
|
if (next_timeout == NULL) {
|
||
|
return 0xffffffff;
|
||
|
}
|
||
|
diff = sys_now() - timeouts_last_time;
|
||
|
if (diff > next_timeout->time) {
|
||
|
return 0;
|
||
|
} else {
|
||
|
return next_timeout->time - diff;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#else /* NO_SYS */
|
||
|
|
||
|
/**
|
||
|
* Wait (forever) for a message to arrive in an mbox.
|
||
|
* While waiting, timeouts are processed.
|
||
|
*
|
||
|
* @param mbox the mbox to fetch the message from
|
||
|
* @param msg the place to store the message
|
||
|
*/
|
||
|
void
|
||
|
sys_timeouts_mbox_fetch(sys_mbox_t *mbox, void **msg)
|
||
|
{
|
||
|
u32_t time_needed;
|
||
|
struct sys_timeo *tmptimeout;
|
||
|
sys_timeout_handler handler;
|
||
|
void *arg;
|
||
|
|
||
|
again:
|
||
|
if (!next_timeout) {
|
||
|
time_needed = sys_arch_mbox_fetch(mbox, msg, 0);
|
||
|
} else {
|
||
|
if (next_timeout->time > 0) {
|
||
|
time_needed = sys_arch_mbox_fetch(mbox, msg, next_timeout->time);
|
||
|
} else {
|
||
|
time_needed = SYS_ARCH_TIMEOUT;
|
||
|
}
|
||
|
|
||
|
if (time_needed == SYS_ARCH_TIMEOUT) {
|
||
|
/* If time == SYS_ARCH_TIMEOUT, a timeout occurred before a message
|
||
|
could be fetched. We should now call the timeout handler and
|
||
|
deallocate the memory allocated for the timeout. */
|
||
|
tmptimeout = next_timeout;
|
||
|
next_timeout = tmptimeout->next;
|
||
|
handler = tmptimeout->h;
|
||
|
arg = tmptimeout->arg;
|
||
|
#if LWIP_DEBUG_TIMERNAMES
|
||
|
if (handler != NULL) {
|
||
|
LWIP_DEBUGF(TIMERS_DEBUG, ("stmf calling h=%s arg=%p\n",
|
||
|
tmptimeout->handler_name, arg));
|
||
|
}
|
||
|
#endif /* LWIP_DEBUG_TIMERNAMES */
|
||
|
memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
|
||
|
if (handler != NULL) {
|
||
|
/* For LWIP_TCPIP_CORE_LOCKING, lock the core before calling the
|
||
|
timeout handler function. */
|
||
|
LOCK_TCPIP_CORE();
|
||
|
handler(arg);
|
||
|
UNLOCK_TCPIP_CORE();
|
||
|
}
|
||
|
LWIP_TCPIP_THREAD_ALIVE();
|
||
|
|
||
|
/* We try again to fetch a message from the mbox. */
|
||
|
goto again;
|
||
|
} else {
|
||
|
/* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout
|
||
|
occured. The time variable is set to the number of
|
||
|
milliseconds we waited for the message. */
|
||
|
if (time_needed < next_timeout->time) {
|
||
|
next_timeout->time -= time_needed;
|
||
|
} else {
|
||
|
next_timeout->time = 0;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#endif /* NO_SYS */
|
||
|
|
||
|
#else /* LWIP_TIMERS */
|
||
|
/* Satisfy the TCP code which calls this function */
|
||
|
void
|
||
|
tcp_timer_needed(void)
|
||
|
{
|
||
|
}
|
||
|
#endif /* LWIP_TIMERS */
|