关于服务器端用C语言实现TCP的数据接收

关于这个，真的是踩过很多坑，罗列了一下要注意的点：

1. 代码前面一定要添加库，不然会出很多错

   #pragma comment(lib, "Ws2_32.lib")

   
   
2. 这段代码在vs2017中怎么也编译不通过
3. 建议在vc++6.0中编译，我是在此环境下编译通过的
4. 作为服务器端时，服务器每接收一次就要断掉，再发送需要客户端重新连接

#include <WinSock2.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#pragma comment(lib, "Ws2_32.lib")
int main(int argc, char* argv[])
{
    //初始化WSA
    WORD sockVersion = MAKEWORD(2,2);
    WSADATA wsaData;
    if(WSAStartup(sockVersion, &wsaData)!=0)
    {
        return 0;
    }

    //创建套接字
    SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(slisten == INVALID_SOCKET)
    {
        printf("socket error !");
        return 0;
    }

    //绑定IP和端口
    sockaddr_in sin;
    sin.sin_family = AF_INET;
    sin.sin_port = htons(1234);
    sin.sin_addr.S_un.S_addr = INADDR_ANY; 
    if(bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
    {
        printf("bind error !");
    }

    //开始监听
    if(listen(slisten, 5) == SOCKET_ERROR)
    {
        printf("listen error !");
        return 0;
    }

    //循环接收数据
    SOCKET sClient;
    sockaddr_in remoteAddr;
    int nAddrlen = sizeof(remoteAddr);
    char revData[255]; 
    while (true)
    {
        printf("等待连接...\n");
        sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
        if(sClient == INVALID_SOCKET)
        {
            printf("accept error !");
            continue;
        }
        printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr));
        
        //接收数据
        int ret = recv(sClient, revData, 255, 0);        
        if(ret > 0)
        {
            revData[ret] = 0x00;
            printf(revData);
        }

        //发送数据
        char * sendData = "你好，TCP客户端！\n";
        send(sClient, sendData, strlen(sendData), 0);
        closesocket(sClient);
    }
    closesocket(slisten);
    WSACleanup();
    return 0;
}

关于客户端的或者UDP的可以看下这篇：http://blog.csdn.net/oinux/article/details/8525823