Danger-alarm/SOFTWARE-FreeRTOS/Common/ethernet/lwIP/api/tcpip.c

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2024-06-03 16:27:41 +08:00
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#include "lwip/sys.h"
#include "lwip/memp.h"
#include "lwip/pbuf.h"
#include "lwip/ip.h"
#include "lwip/ip_frag.h"
#include "lwip/udp.h"
#include "lwip/tcp.h"
#include "lwip/tcpip.h"
static void (* tcpip_init_done)(void *arg) = NULL;
static void *tcpip_init_done_arg;
static sys_mbox_t mbox;
#if LWIP_TCP
static int tcpip_tcp_timer_active = 0;
static void
tcpip_tcp_timer(void *arg)
{
(void)arg;
/* call TCP timer handler */
tcp_tmr();
/* timer still needed? */
if (tcp_active_pcbs || tcp_tw_pcbs) {
/* restart timer */
sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
} else {
/* disable timer */
tcpip_tcp_timer_active = 0;
}
}
#if !NO_SYS
void
tcp_timer_needed(void)
{
/* timer is off but needed again? */
if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
/* enable and start timer */
tcpip_tcp_timer_active = 1;
sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
}
}
#endif /* !NO_SYS */
#endif /* LWIP_TCP */
#if IP_REASSEMBLY
static void
ip_timer(void *data)
{
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: ip_reass_tmr()\n"));
ip_reass_tmr();
sys_timeout(1000, ip_timer, NULL);
}
#endif
static void
tcpip_thread(void *arg)
{
struct tcpip_msg *msg;
(void)arg;
ip_init();
#if LWIP_UDP
udp_init();
#endif
#if LWIP_TCP
tcp_init();
#endif
#if IP_REASSEMBLY
sys_timeout(1000, ip_timer, NULL);
#endif
if (tcpip_init_done != NULL) {
tcpip_init_done(tcpip_init_done_arg);
}
while (1) { /* MAIN Loop */
sys_mbox_fetch(mbox, (void *)&msg);
switch (msg->type) {
case TCPIP_MSG_API:
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
api_msg_input(msg->msg.apimsg);
break;
case TCPIP_MSG_INPUT:
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: IP packet %p\n", (void *)msg));
ip_input(msg->msg.inp.p, msg->msg.inp.netif);
break;
case TCPIP_MSG_CALLBACK:
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
msg->msg.cb.f(msg->msg.cb.ctx);
break;
default:
break;
}
memp_free(MEMP_TCPIP_MSG, msg);
}
}
err_t
tcpip_input(struct pbuf *p, struct netif *inp)
{
struct tcpip_msg *msg;
msg = memp_malloc(MEMP_TCPIP_MSG);
if (msg == NULL) {
pbuf_free(p);
return ERR_MEM;
}
msg->type = TCPIP_MSG_INPUT;
msg->msg.inp.p = p;
msg->msg.inp.netif = inp;
sys_mbox_post(mbox, msg);
return ERR_OK;
}
err_t
tcpip_callback(void (*f)(void *ctx), void *ctx)
{
struct tcpip_msg *msg;
msg = memp_malloc(MEMP_TCPIP_MSG);
if (msg == NULL) {
return ERR_MEM;
}
msg->type = TCPIP_MSG_CALLBACK;
msg->msg.cb.f = f;
msg->msg.cb.ctx = ctx;
sys_mbox_post(mbox, msg);
return ERR_OK;
}
void
tcpip_apimsg(struct api_msg *apimsg)
{
struct tcpip_msg *msg;
msg = memp_malloc(MEMP_TCPIP_MSG);
if (msg == NULL) {
memp_free(MEMP_API_MSG, apimsg);
return;
}
msg->type = TCPIP_MSG_API;
msg->msg.apimsg = apimsg;
sys_mbox_post(mbox, msg);
}
void
tcpip_init(void (* initfunc)(void *), void *arg)
{
tcpip_init_done = initfunc;
tcpip_init_done_arg = arg;
mbox = sys_mbox_new();
sys_thread_new(tcpip_thread, NULL, TCPIP_THREAD_PRIO);
}