下面的程式碼是有點小問題的，不過在這做個小的模版

#include <stdlib.h>
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"

#include "lwip/debug.h"
#include "lwip/stats.h"
#include "lwip/tcp.h"
#include <string.h>
#include <stdio.h>

char g_netLog[64] = "baiyu";

#define     MAX_NAME_SIZE       32

const
 
 char server_ip_str[]="192.168.0.102";
const unsigned short server_port=8888;
u8 TCP_Client_RecvBuf[256]; 
u8 TCP_Client_SendBuf[256];

static int TCP_Client_Thread()
{
    int ret;
    struct sockaddr_in local_addr;
    int socket_fd;  
    int rc;

    local_addr.sin_addr.s_addr = inet_addr(server_ip_str);
    local_addr.sin_family = AF_INET;
    local_addr.sin_port = htons(server_port);
    socket_fd=socket(AF_INET,SOCK_STREAM,0
 
);
    if(socket_fd== -1)
    {
        return -1;
    }
    ret=connect(socket_fd,(struct sockaddr*)&local_addr,sizeof(local_addr));
    if(ret==-1)
    {
        close(socket_fd);
        return -2;
    }
    for(;;)
    {
        /*
        if(send(s, TCP_Client_SendBuf,256,0)<0){
            printf("[TCP_Client_Thread]:send server failure....\r\n");
        }
        */
 


        ret=recv(socket_fd,TCP_Client_RecvBuf,256,0);
        if(ret==-1){
            printf("[TCP_Client_Thread]:socket read ....\r\n");
            close(socket_fd);
            break;
        }
        else if(ret == 0){
            printf("[TCP_Client_Thread]:socket connect server failure....\r\n");
            close(socket_fd);
            break;
        }
        else{
            printf("%s\n",TCP_Client_RecvBuf);
            memcpy(TCP_Client_SendBuf,TCP_Client_RecvBuf, 256);
            rc = send(socket_fd, TCP_Client_SendBuf,256,0);
        }
        #ifdef NET_LOG
        if(mqtt_reconnect_flag){
            mqtt_reconnect_flag = 0;
            return -3;
        }
        sys_msleep(1000);
        #endif
    }
    return 0;
}

void net_log_hy(void *arg)
{
    int ret = 0;
    for(;;){
        ret = TCP_Client_Thread();
        if(ret == -3){
            printf("[net_log_hy]:net reconnet\n");
        }
        else if(ret == -1){
                printf("[net_log_hy]:socket Create a failure!\r\n");

        }else if(ret == -2){
                    printf("[net_log_hy]:connect server failure....\r\n");
        }
        else{
            printf("[net_log_hy]:noting\n");
        }
        sys_msleep(1000);
    }   
}