winSocket 简单实现

#define WIN32_LEAN_AND_MEAN
#define  _WINSOCK_DEPRECATED_NO_WARNINGS 


#include<iostream>
#include<stdio.h>
#include<Windows.h>
#include<WinSock2.h>
//#pragma comment(lib,"ws2_32.lib")// win 写法 + 动态库 


using namespace std;
int main()
{
    WORD ver = MAKEWORD(2, 2);
    WSADATA data;
    WSAStartup(ver, &data);
    //socket 网络通信  代码

    //tcp 服务端
    //1. 建立一个socket
    SOCKET _sock= socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    //2.绑定用于客户端接收的网路端口
    sockaddr_in _sin = {};
    _sin.sin_family = AF_INET;
    _sin.sin_port = htons(4567);
    _sin.sin_addr.S_un.S_addr = htonl(INADDR_ANY);// inet_addr("127.0.0.1");//服务器 要绑定的ip地址

    if (SOCKET_ERROR == bind(_sock, (sockaddr*)&_sin, sizeof(_sin))) {
        printf("bind error");
    }
    else {
        printf("bind successful");
    }
    //3.监听端口
    if (SOCKET_ERROR == listen(_sock, 5)) {
        printf("listen error");
    }
    else {
        printf("listen successful");
    }
    //4。accept 等待接收客户连接
    sockaddr_in _clientAddr = {};
    SOCKET _cSock ;
    char msgbuf[] = "hello world";
    int _cSock_Strlen = strlen(msgbuf) + 1;
    int len = sizeof(_clientAddr);
    //_cSock = accept(_sock, (sockaddr*)&_clientAddr, (int*)sizeof(_clientAddr)); //会返回客户端地址
    while (true)
    {
        _cSock = accept(_sock, (sockaddr*)&_clientAddr, &len); //会返回客户端地址
        if (INVALID_SOCKET == _cSock) {
            printf("INVALIE client socket");
        }
        printf("new client:IP=%s
", inet_ntoa(_clientAddr.sin_addr));
        //5。send 发送一条数据
        send(_cSock, msgbuf,  _cSock_Strlen, 0);
    }
    //6. 关闭socket
        closesocket(_sock);
    WSACleanup();
    return 0;
}

#define WIN32_LEAN_AND_MEAN
#define  _WINSOCK_DEPRECATED_NO_WARNINGS 


#include<iostream>
#include<stdio.h>
#include<Windows.h>
#include<WinSock2.h>
//#pragma comment(lib,"ws2_32.lib")// win 写法 + 动态库 


using namespace std;
int main()
{
    WORD ver = MAKEWORD(2, 2);
    WSADATA data;
    WSAStartup(ver, &data);
    //socket 网络通信  代码

    //tcp 服务端
    //1. 建立一个socket
    SOCKET _sock= socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    //2.绑定用于客户端接收的网路端口
    sockaddr_in _sin = {};
    _sin.sin_family = AF_INET;
    _sin.sin_port = htons(4567);
    _sin.sin_addr.S_un.S_addr = htonl(INADDR_ANY);// inet_addr("127.0.0.1");//服务器 要绑定的ip地址

    if (SOCKET_ERROR == bind(_sock, (sockaddr*)&_sin, sizeof(_sin))) {
        printf("bind error");
    }
    else {
        printf("bind successful");
    }
    //3.监听端口
    if (SOCKET_ERROR == listen(_sock, 5)) {
        printf("listen error");
    }
    else {
        printf("listen successful");
    }
    //4。accept 等待接收客户连接
    sockaddr_in _clientAddr = {};
    SOCKET _cSock ;
    char msgbuf[] = "hello world";
    int _cSock_Strlen = strlen(msgbuf) + 1;
    int len = sizeof(_clientAddr);
    //_cSock = accept(_sock, (sockaddr*)&_clientAddr, (int*)sizeof(_clientAddr)); //会返回客户端地址
    while (true)
    {
        _cSock = accept(_sock, (sockaddr*)&_clientAddr, &len); //会返回客户端地址
        if (INVALID_SOCKET == _cSock) {
            printf("INVALIE client socket");
        }
        printf("new client:IP=%s
", inet_ntoa(_clientAddr.sin_addr));
        //5。send 发送一条数据
        send(_cSock, msgbuf,  _cSock_Strlen, 0);
    }
    //6. 关闭socket
        closesocket(_sock);
    WSACleanup();
    return 0;
}