windows之socket编程示例

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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;}

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