Learn simple socket communication for Windows

The client code is as follows

1 initialize the socket (WSASatrtup)

2 Create scoket

3 connection

4 receives information

5 Close the socket

 

 

#include <Windows.h>
#include <conio.h>
#include <Winsock.h>
#include <iostream>
using namespace std;
//socket 库 
#pragma comment(lib, "Ws2_32.lib")
void  StartUpWindowsSocket()
{
	WSADATA wsData = {0};
	WSAStartup(MAKEWORD(2, 2), &wsData);
}

void TCPClientSocket()
{
	//创建socket
	SOCKET sk = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
	if (INVALID_SOCKET == sk)
	{
		return;
	}

	//连接

	struct sockaddr_in addr = {0};
	addr.sin_family = AF_INET;
	addr.sin_port = htons(2222);

	addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
	int  a = connect(sk, (sockaddr *)&addr, sizeof(addr));

	// 数据收发

	char szText[100] = "hello Server";

	send(sk, szText, sizeof(szText), 0);

	recv(sk, szText, 100, 0);
	cout << "发送的数据：	" << szText << endl;

	getch();
	// 关闭socket
	closesocket(sk);


}

int main()
{
	StartUpWindowsSocket();
	TCPClientSocket();

	return 0;
}

Server

1 Initialization socket

2 Create scocket

3 Bind

4 listeners

5 accept connections

6 send and receive information

7 Close 

#include <Windows.h>
#include <conio.h>
#include <iostream>
using namespace std;
#include <Winsock.h>
//socket 库 
#pragma comment(lib, "Ws2_32.lib")
void  StartUpWindowsSocket()
{
	WSADATA wsData = {0};
	WSAStartup(MAKEWORD(2, 2), &wsData);
}

void TCPServer()
{
	//创建socket
	SOCKET sk = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
	if (INVALID_SOCKET == sk)
	{
		return;
	}
	
	//绑定
	struct sockaddr_in ssck = {0};
	ssck.sin_family = AF_INET;
	ssck.sin_port = htons(2222);
	ssck.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
	bind(sk, (sockaddr *)&ssck, sizeof(ssck));

	//监听
	listen(sk, SOMAXCONN);


	//接收
	cout << "等待客户端连接" << endl;
	struct sockaddr_in SocketAddClient = {0};
	int nLen = sizeof(SocketAddClient);
	SOCKET SocketClient = accept(sk, (sockaddr*)&SocketAddClient,&nLen);
	cout << "客户端已连接" << endl;
	 if (SocketClient == INVALID_SOCKET)
	 {
		 int a = 10;

	 }
	//接受数据
	char szText[100] ={0};
	recv(SocketClient,szText, 100, 0);
	cout << "收到的数据：	" <<szText  <<  endl;
	send(SocketClient, szText, sizeof(szText), 0);

   	getch();
   closesocket(sk);
   closesocket(SocketClient);

}

int main()
{
	StartUpWindowsSocket();
	TCPServer();
	return 0;
}