LWIP netconn TCP UDP测试 实例
本文由自己从网络上查资料整理而成 已经测试可用
只需修改下就能用到项目中
给需要的童鞋们参考
平台（LM3S9B92+UCOSII+LWIP）
在线IP地址转换器（二进制 十进制 十六进制转换）
http://www.ab126.com/goju/1840.html
LWIP netconn API函数下 实现的
TCP服务器
TCP客户端
UDP测试
UDP流程
conn = netconn_new(NETCONN_UDP); //创建UDP连接netconn_bind(conn,IP_ADDR_ANY, 80); //绑定端口号
netconn_connect(conn,&destip,destport);
netconn_send(conn,UDPNetbuf); //收或发
netconn_delete(conn);
主程序（三个线程只打开了一个UDP的TCP测试的被注释了每次打开一个即可测试）
#include <includes.h>
#include "lwip/sys.h"
#include "user/my_tcp_client.h"
#include "utils/uartstdio.h"
/* Application tasks */
#define TASK_INPUT_PRIO 11
#define TASK_LWIP_PRIO 3
#define taskinputstck 1024
#define tasklwipstck 1024
static OS_STK App_TaskStartStk[APP_CFG_TASK_START_STK_SIZE];
OS_STK taskinput_stack[taskinputstck];
OS_STK tasklwip_stack[tasklwipstck];
extern struct netif lwip_netif;
extern void stellarisif_input(void *arg);
extern void httpd_thread(void *arg);
extern void my_lwip_init(void);
extern void tftp_thread(void *arg);
static void App_TaskStart (void *p_arg);
int main (void)
{
BSP_PreInit ();
BSP_IntDisAll();
OSInit(); /* Initialize "uC/OS-II, The Real-Time Kernel" */
OSTaskCreateExt((void (*)(void *)) App_TaskStart, /* Create the start task */
(void *) 0,
(OS_STK *)&App_TaskStartStk[APP_CFG_TASK_START_STK_SIZE - 1],
(INT8U ) APP_CFG_TASK_START_PRIO,
(INT16U ) APP_CFG_TASK_START_PRIO,
(OS_STK *)&App_TaskStartStk[0],
(INT32U ) APP_CFG_TASK_START_STK_SIZE,
(void *) 0,
(INT16U )(OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR));
OSStart();
}
static void App_TaskStart (void *p_arg)
{
(void)p_arg;
BSP_PostInit(); /* Initialize BSP functions */
Tmr_TickInit (); /* Initialize the SysTick */
my_lwip_init();
OSTaskCreate(stellarisif_input,
(void *)&lwip_netif,
&taskinput_stack[taskinputstck - 1],
TASK_INPUT_PRIO);
//OSTaskCreate(httpd_thread,
/*OSTaskCreate(tftp_thread,
(void *)0,
&tasklwip_stack[tasklwipstck - 1],
TASK_LWIP_PRIO);*/
/* OSTaskCreate(my_tcp_client_thread,
(void *)0,
&tasklwip_stack[tasklwipstck - 1],
TASK_LWIP_PRIO);*/
// sys_thread_new("tcpserv",my_tcp_server_thread, (void *)0, 1024, 2); //测试TCP服务器
// sys_thread_new("tcpclt",my_tcp_client_thread, (void *)0, 1024, 2); //测试TCP客户端
sys_thread_new("udp",my_udp_thread, (void *)0, 1024, 2); //测试UDP
#if (OS_TASK_STAT_EN > 0)
OSStatInit(); /* Determine CPU capacity */
#endif
for(;;)
{
OSTaskSuspend(OS_PRIO_SELF); /* The start task can be pended here. */
}
}
测试程序
头文件
#ifndef __MY_TCP_CLIENT_H__ #define __MY_TCP_CLIENT_H__ void my_tcp_server_thread(void *arg); void my_tcp_client_thread(void *arg); void my_udp_thread(void *arg); #endif
.C文件
#include "includes.h" /* uC/OS interface */
#include "lwip/api.h"
#include <stdio.h>
#include <string.h>
#include "user/my_tcp_client.h"
#include "utils/uartstdio.h"
//*********************************************************
//
// tcp 服务器端测试程序
//
//*********************************************************
void my_tcp_server_thread(void *arg)
{
struct netconn *conn, *newconn = NULL;
struct netbuf *TCPNetbuf;
char getText[]="hello i am server!";
conn = netconn_new(NETCONN_TCP); /* 创建TCP连接 */
netconn_bind(conn,NULL,80); /* 绑定本地地址和监听的端口号 */
netconn_listen(conn); /* 进入监听状态 */
UARTprintf("\033[2JTCP listening\n");
while(1)
{
newconn = netconn_accept(conn); /*阻塞当前进程到有数据接收 */
if(newconn != NULL)
{
/* 发送数据 */
netconn_write(newconn,(void *)&getText,sizeof(getText),NETCONN_NOCOPY);
netbuf_delete(TCPNetbuf);
netconn_close(newconn); /* 关闭连接 */
while(netconn_delete(newconn) != ERR_OK)
OSTimeDlyHMSM(0, 0, 1, 0);
}
}
}
//*********************************************************
//
// tcp 客户端测试程序
//
//*********************************************************
void my_tcp_client_thread(void *arg)
{
struct netconn *conn;
struct netbuf *TCPNetbuf;
// char *dat;
err_t myerr;
char Text[]="hello i am client!";
static struct ip_addr serverip; //目标机IP
static unsigned short serverport; //目标机端口号
serverip.addr = htonl(0xC0A8016A); //192.168.1.106
serverport=7000;
conn = netconn_new(NETCONN_TCP); /* 创建TCP连接 */
netconn_bind(conn,NULL,7000); /* 绑定本地地址和监听的端口号 */
OSTimeDlyHMSM(0, 0, 3, 0);
UARTprintf("\033[2JTCP connect....\n");
myerr=netconn_connect(conn,&serverip,serverport); //连接主机 cnn，目标机IP，端口号
if(myerr==-1)
{
UARTprintf("\033[2JTCP connect err\n");
}else{
UARTprintf("\033[2JTCP connect ok\n");
}
/* 建立一个新的netbuf */
TCPNetbuf =netbuf_new();
// netbuf_alloc(TCPNetbuf, 40);
/* 引用这个文本给netbuf */
netbuf_ref(TCPNetbuf,Text,sizeof(Text));
while(1)
{
OSTimeDlyHMSM(0, 0, 3, 0);
/* 发送文本 */
netconn_send(conn,TCPNetbuf);
netconn_write(conn,(void *)&Text,sizeof(Text),NETCONN_NOCOPY);
OSTimeDlyHMSM(0, 0, 3, 0);
/* 删除conn和buf */
netconn_delete(conn);
netbuf_delete(TCPNetbuf);
}
}
//*********************************************************
//
// tcp 客户端测试程序
//
//*********************************************************
void my_udp_thread(void *arg)
{
static struct netconn *conn;
static struct netbuf *UDPNetbuf;
static struct ip_addr destip; //目标机IP
static unsigned short destport; //目标机端口号
unsigned char Array[]="hello i am udp!";
destip.addr = htonl(0xC0A8016A); //192.168.1.106
destport=7000;
/* 建立一个新的netbuf */
// UDPNetbuf =netbuf_new();
conn = netconn_new(NETCONN_UDP); //创建UDP连接
netconn_bind(conn,IP_ADDR_ANY, 80); //绑定端口号
while(1)
{
OSTimeDlyHMSM(0, 0, 3, 0);
UARTprintf("\033[2JUDP connec...\n");
/* 连接远程主机 */
netconn_connect(conn,&destip,destport);
/* 建立一个新的netbuf */
UDPNetbuf= netbuf_new();
/* 引用这个文本给netbuf */
netbuf_ref(UDPNetbuf,Array, sizeof(Array));
/* 发送文本 */
netconn_send(conn,UDPNetbuf);
OSTimeDlyHMSM(0, 0, 3, 0);
/* 删除conn和buf */
netconn_delete(conn);
netbuf_delete(UDPNetbuf); //释放缓冲区
}
}
最后附上一个TCP服务器接收并把收到的数据返回的参考
/* Grab new connection. */
newconn = netconn_accept(conn);
/* Process the new connection. */
if (newconn)
{
struct netbuf *buf;
void *data;
u16_t len;
while ((buf = netconn_recv(newconn)) != NULL)
{
do
{
netbuf_data(buf, &data, &len);
netconn_write(newconn, data, len, NETCONN_COPY);
}
while (netbuf_next(buf) >= 0);
netbuf_delete(buf);
}
/* Close connection and discard connection identifier. */
netconn_close(newconn);
netconn_delete(newconn);
参考文章 http://www.amobbs.com/thread-5059971-1-1.html