windows环境下使用socket进行tcp通信

 客户端

#define WIN32 _LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS 
#include<iostream>
#include<WinSock2.h>
#include<Windows.h>
#include<stdio.h>

using namespace std;
#pragma comment (lib, "ws2_32.lib") 
//#ws2_32.lib
int main()
{
WORD ver = MAKEWORD(2, 2);
WSADATA dat;
WSAStartup(ver, &dat);
//1.创立socket 1.IPV4网络  类型:数据流  TCP
//套接字
SOCKET _sock = socket(AF_INET, SOCK_STREAM, 0);
//2.connect连接服务器
sockaddr_in _sin = {};
_sin.sin_family = AF_INET;
_sin.sin_port = htons(4567);//host_to_net unsigned short
_sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
if (SOCKET_ERROR == connect(_sock, (sockaddr*)&_sin, sizeof(_sin)))
{
printf("链接失败\n");
}
else {
printf("链接网络成功\n");
};
//3，recv接收数据 监听网络接口
char recvbuffer[1024] = {};
;
if (SOCKET_ERROR == recv(_sock, recvbuffer, sizeof(recvbuffer), 0))
{
printf("接受失败\n");
}
else {
printf("接受成功\n");
}
cout << recvbuffer << endl;

//6.关闭
closesocket(_sock);
WSACleanup();
return 0;
}

服务端

#define WIN32 _LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS 
#include<iostream>
#include<WinSock2.h>
#include<Windows.h>

using namespace std;
#pragma comment (lib, "ws2_32.lib") 
//#ws2_32.lib
int main()
{
WORD ver = MAKEWORD(2, 2);
WSADATA dat;
WSAStartup(ver, &dat);
//1.创立socket 1.IPV4网络  类型:数据流  TCP
//套接字
SOCKET _sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
//2.bind绑定接收客户端
sockaddr_in _sin = {};
_sin.sin_family = AF_INET;
_sin.sin_port = htons(4567);//host_to_net unsigned short
_sin.sin_addr.S_un.S_addr = INADDR_ANY;//inet_addr("127.0.0.1")
if (SOCKET_ERROR==bind(_sock, (sockaddr*)&_sin, sizeof(_sin)) )
{
printf("绑定失败\n");
}
else {
printf("绑定网络成功\n");
};
//3，listen 监听网络接口
if (SOCKET_ERROR == listen(_sock, 5))
{
printf("监听失败\n");
}
else {
printf("监听成功\n");
}

//4.接受数据
sockaddr_in _clientaddr = {};
int naddrlen = sizeof(_clientaddr);
SOCKET _clientsocket = INVALID_SOCKET;
while (true)
{
_clientsocket = accept(_sock, (sockaddr*)&_clientaddr, &naddrlen);
if (_clientsocket == INVALID_SOCKET)
{
printf("错误，接受无效客户端socket....\n");
}
cout << "新客户端加入： ip= " << inet_ntoa(_clientaddr.sin_addr)<<endl; 
//5.send 向客户端发送一条数据
char msgBuf[] = "hello, I'M server";
send(_clientsocket, msgBuf, strlen(msgBuf) + 1, 0);
}
//6.关闭
closesocket(_sock);
WSACleanup();
return 0;
}

原文地址：https://blog.csdn.net/weixin_57011178/article/details/142729674

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