Atmel Software Framework

lwip-1.4.0/src/api/tcpip.c File Reference

Sequential API Main thread module.

#include "lwip/opt.h"
#include "lwip/sys.h"
#include "lwip/memp.h"
#include "lwip/mem.h"
#include "lwip/pbuf.h"
#include "lwip/tcpip.h"
#include "lwip/init.h"
#include "netif/etharp.h"
#include "netif/ppp_oe.h"

Functions

err_t mem_free_callback (void *m)
 A simple wrapper function that allows you to free heap memory from interrupt context. More...
 
err_t pbuf_free_callback (struct pbuf *p)
 A simple wrapper function that allows you to free a pbuf from interrupt context. More...
 
static void pbuf_free_int (void *p)
 Simple callback function used with tcpip_callback to free a pbuf (pbuf_free has a wrong signature for tcpip_callback) More...
 
err_t tcpip_callback_with_block (tcpip_callback_fn function, void *ctx, u8_t block)
 Call a specific function in the thread context of tcpip_thread for easy access synchronization. More...
 
void tcpip_init (tcpip_init_done_fn initfunc, void *arg)
 Initialize this module: More...
 
err_t tcpip_input (struct pbuf *p, struct netif *inp)
 Pass a received packet to tcpip_thread for input processing. More...
 
static void tcpip_thread (void *arg)
 The main lwIP thread. More...
 

Variables

static sys_mbox_t mbox
 
static tcpip_init_done_fn tcpip_init_done
 
static void * tcpip_init_done_arg
 

err_t mem_free_callback ( void *  m)

A simple wrapper function that allows you to free heap memory from interrupt context.

Parameters
mthe heap memory to free
Returns
ERR_OK if callback could be enqueued, an err_t if not
err_t pbuf_free_callback ( struct pbuf p)

A simple wrapper function that allows you to free a pbuf from interrupt context.

Parameters
pThe pbuf (chain) to be dereferenced.
Returns
ERR_OK if callback could be enqueued, an err_t if not
static void pbuf_free_int ( void *  p)
static

Simple callback function used with tcpip_callback to free a pbuf (pbuf_free has a wrong signature for tcpip_callback)

Parameters
pThe pbuf (chain) to be dereferenced.

References pbuf_free().

Referenced by pbuf_free_callback().

err_t tcpip_callback_with_block ( tcpip_callback_fn  function,
void *  ctx,
u8_t  block 
)

Call a specific function in the thread context of tcpip_thread for easy access synchronization.

A function called in that way may access lwIP core code without fearing concurrent access.

Parameters
fthe function to call
ctxparameter passed to f
block1 to block until the request is posted, 0 to non-blocking mode
Returns
ERR_OK if the function was called, another err_t if not

Referenced by mem_free_callback(), and pbuf_free_callback().

void tcpip_init ( tcpip_init_done_fn  initfunc,
void *  arg 
)

Initialize this module:

  • initialize all sub modules
  • start the tcpip_thread
Parameters
initfunca function to call when tcpip_thread is running and finished initializing
argargument to pass to initfunc

Referenced by prvlwIPInit().

err_t tcpip_input ( struct pbuf p,
struct netif inp 
)

Pass a received packet to tcpip_thread for input processing.

Parameters
pthe received packet, p->payload pointing to the Ethernet header or to an IP header (if inp doesn't have NETIF_FLAG_ETHARP or NETIF_FLAG_ETHERNET flags)
inpthe network interface on which the packet was received

Referenced by netif_init(), and prvEthernetConfigureInterface().

static void tcpip_thread ( void *  arg)
static

The main lwIP thread.

This thread has exclusive access to lwIP core functions (unless access to them is not locked). Other threads communicate with this thread using message boxes.

It also starts all the timers to make sure they are running in the right thread context.

Parameters
argunused argument

References tcpip_msg::cb, tcpip_msg::function, tcpip_msg::inp, LOCK_TCPIP_CORE, LWIP_ASSERT, LWIP_DEBUGF, LWIP_TCPIP_THREAD_ALIVE, LWIP_UNUSED_ARG, memp_free(), tcpip_msg::msg, msg, NETIF_FLAG_ETHARP, NETIF_FLAG_ETHERNET, NULL, sys_timeout(), sys_timeouts_mbox_fetch(), sys_untimeout(), TCPIP_DEBUG, tcpip_init_done, tcpip_init_done_arg, TCPIP_MSG_CALLBACK, TCPIP_MSG_INPKT, TCPIP_MSG_TIMEOUT, TCPIP_MSG_UNTIMEOUT, tcpip_msg::tmo, tcpip_msg::type, and UNLOCK_TCPIP_CORE.

Referenced by tcpip_init().

sys_mbox_t mbox
static
tcpip_init_done_fn tcpip_init_done
static

Referenced by tcpip_init(), and tcpip_thread().

void* tcpip_init_done_arg
static

Referenced by tcpip_init(), and tcpip_thread().