lwip_timers_141.c File Reference

Stack-internal timers implementation.

This file includes timer callbacks for stack-internal timers as well as functions to set up or stop timers and check for expired timers.

#include "lwip/opt.h"
#include "lwip/timers.h"
#include "lwip/tcp_impl.h"
#include "lwip/def.h"
#include "lwip/memp.h"
#include "lwip/tcpip.h"
#include "lwip/ip_frag.h"
#include "netif/etharp.h"
#include "lwip/dhcp.h"
#include "lwip/autoip.h"
#include "lwip/igmp.h"
#include "lwip/dns.h"
#include "lwip/sys.h"

Functions
static void	arp_timer (void *arg)
	Timer callback function that calls etharp_tmr() and reschedules itself. More...
	if (timeout==NULL)
	if (next_timeout==NULL)
	if (next_timeout->time > msecs)
static void	ip_reass_timer (void *arg)
	Timer callback function that calls ip_reass_tmr() and reschedules itself. More...
void	sys_timeouts_init (void)
	Initialize this module. More...
void	tcp_timer_needed (void)
	Called from TCP_REG when registering a new PCB: the reason is to have the TCP timer only running when there are active (or time-wait) PCBs. More...
static void	tcpip_tcp_timer (void *arg)
	Timer callback function that calls tcp_tmr() and reschedules itself. More...

Variables
timeout	arg = arg
timeout	h = handler
timeout	next = NULL
static struct sys_timeo *	next_timeout
	Fix lwIP warning in standalone mode. More...
static int	tcpip_tcp_timer_active
	global variable that shows if the tcp timer is currently scheduled or not More...
timeout	time = msecs
	timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT)
static u32_t	timeouts_last_time
	void
	Create a one-shot timer (aka timeout). More...

static void arp_timer ( void *  arg )

static

Timer callback function that calls etharp_tmr() and reschedules itself.

Parameters

arg	unused argument

References ARP_TMR_INTERVAL, etharp_tmr(), LWIP_DEBUGF, LWIP_UNUSED_ARG, NULL, sys_timeout(), and TIMERS_DEBUG.

Referenced by sys_timeouts_init().

if

(

timeout

= = NULL

)

References LWIP_ASSERT, and NULL.

Referenced by etharp_query(), icmp_input(), ip_frag(), ip_input(), ip_reass(), ip_reass_chain_frag_into_datagram_and_validate(), ip_reass_free_complete_datagram(), pbuf_header(), tcp_zero_window_probe(), and udp_input().

if

(

next_timeout

= = NULL

)

References timeout.

if	(	next_timeout->	time,
		msecs
	)

References sys_timeo::next, next_timeout, sys_timeo::time, and timeout.

static void ip_reass_timer ( void *  arg )

static

Timer callback function that calls ip_reass_tmr() and reschedules itself.

Parameters

arg	unused argument

References ip_reass_tmr(), IP_TMR_INTERVAL, LWIP_DEBUGF, LWIP_UNUSED_ARG, NULL, sys_timeout(), and TIMERS_DEBUG.

Referenced by sys_timeouts_init().

void sys_timeouts_init

(

void

)

Initialize this module.

References arp_timer(), ARP_TMR_INTERVAL, ip_reass_timer(), IP_TMR_INTERVAL, NULL, sys_now(), sys_timeout(), and timeouts_last_time.

Referenced by lwip_init().

void tcp_timer_needed

(

void

)

Called from TCP_REG when registering a new PCB: the reason is to have the TCP timer only running when there are active (or time-wait) PCBs.

External function (implemented in timers.c), called when TCP detects that a timer is needed (i.e.

References NULL, sys_timeout(), tcp_active_pcbs, TCP_TMR_INTERVAL, tcp_tw_pcbs, tcpip_tcp_timer(), and tcpip_tcp_timer_active.

static void tcpip_tcp_timer ( void *  arg )

static

Timer callback function that calls tcp_tmr() and reschedules itself.

Parameters

arg	unused argument

References LWIP_UNUSED_ARG, NULL, sys_timeout(), tcp_active_pcbs, tcp_tmr(), TCP_TMR_INTERVAL, tcp_tw_pcbs, and tcpip_tcp_timer_active.

Referenced by tcp_timer_needed().

timeout arg = arg

Referenced by http_conn_err(), http_poll(), http_recv(), http_sent(), and tcp_arg().

timeout h = handler

timeout next = NULL

Referenced by mem_malloc(), mem_trim(), netif_set_ipaddr(), tcp_fasttmr(), tcp_oos_insert_segment(), tcp_receive(), and tcp_segs_free().

struct sys_timeo* next_timeout

static

Fix lwIP warning in standalone mode.

The one and only timeout list

Referenced by if().

int tcpip_tcp_timer_active

static

global variable that shows if the tcp timer is currently scheduled or not

Referenced by tcp_timer_needed(), and tcpip_tcp_timer().

timeout time = msecs

timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT)

Referenced by if(), and usart_set_rx_timeout().

u32_t timeouts_last_time

static

Referenced by sys_timeouts_init().

void

Initial value:

{
  struct sys_timeo *timeout, *t

Create a one-shot timer (aka timeout).

Timeouts are processed in the following cases:

• while waiting for a message using sys_timeouts_mbox_fetch()
• by calling sys_check_timeouts() (NO_SYS==1 only)

Parameters

msecs	time in milliseconds after that the timer should expire
handler	callback function to call when msecs have elapsed
arg	argument to pass to the callback function

Referenced by stdio_serial_init().