1. tcp服务器端
#include "stdafx.h"
#include <WINSOCK2.H>
#include <windows.h>
#include <iostream>
#include <string>
#pragma comment(lib, "ws2_32.lib ")
using namespace std;
DWORD WINAPI ClientThread(LPVOID sockCliet);
int _tmain(int argc, _TCHAR* argv[])
{
// 0 --- 加载套接字库
WSAData wsaData;
WSAStartup(MAKEWORD(2,2), &wsaData);
// 1 --- 创建套接字
SOCKET serSock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
// 2 --- 绑定套接字
SOCKADDR_IN addrService;
addrService.sin_family = AF_INET;
addrService.sin_addr.s_addr = inet_addr("127.0.0.1");
addrService.sin_port = htons(6000);
bind(serSock, (sockaddr *)&addrService, sizeof(addrService));
// 3 --- 指定最大同时连接数,开始监听
listen(serSock, 10);
// 4 --- 接受新的连接,创建线程处理本次连接
while (1)
{
SOCKADDR_IN addrClient;
int n = sizeof(addrClient);
SOCKET newSock = accept(serSock, (sockaddr*)&addrClient, &n); // newSock应该在子线程中关闭
if (newSock != INVALID_SOCKET)
{
/*
5 --- 利用返回的套接字和客户端进行通信
6 --- 关闭套接字
这两步都在子线程中进行
*/
HANDLE hThread = CreateThread(NULL, 0, ClientThread, (LPVOID)newSock, 0, NULL);
CloseHandle(hThread); // 减小引用计数,并不会关闭线程,线程创建时,引用计数为2
}
else
{
break;
}
}
// 7 --- 关闭套接字
closesocket(serSock);
// 8 --- 关闭加载的套接字库
WSACleanup();
return 0;
}
/****************************
和客户端进行通信的子进程
*****************************/
DWORD WINAPI ClientThread(LPVOID sockClient)
{
SOCKET sock = (SOCKET)sockClient;
char buffer[100] = {0};
while (1)
{
int recvLen = recv(sock, buffer, 100, 0);
if ( 0 == recvLen) break;
cout << "message from client: " << buffer << endl;
//send(sock, "welcome.", strlen("welcome."), 0);
}
closesocket(sock);
return 0;
}
2. tcp客户端
#include "stdafx.h"
#include <WINSOCK2.H>
#include <windows.h>
#include <iostream>
#include <string>
#pragma comment(lib, "ws2_32.lib ")
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
// 0 --- 加载套接字库
WSAData wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
// 1 --- 创建套接字
SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
// 2 --- 绑定套接字
sockaddr_in serverAddr;
serverAddr.sin_family = AF_INET;
serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
serverAddr.sin_port = htons(6000);
// 3 --- 向服务器发出连接请求
connect(clientSocket, (sockaddr*)&serverAddr, sizeof(serverAddr));
// 4 --- 和服务器端进行通信(send/recv)
while (1)
{
Sleep(10000);
send(clientSocket, "welcome.", strlen("welcome."), 0);
}
// 5 --- 关闭套接字
closesocket(clientSocket);
// 6 --- 关闭加载的套接字库
WSACleanup();
return 0;
}