【Socket编程】套接字Windows平台C语言实现

来源：互联网发布：剑灵火炮兰数据编辑：程序博客网时间：2024/05/22 13:43

【编译环境】：Visual Studio 2013

这是服务端实现流程。

#include<stdio.h>#include<stdlib.h>#include<winsock2.h>#pragma comment(lib, "ws2_32.lib")const int BACK_LOG = 5;int main(int argc, char * argv[]){//初始化套接字WSADATA wsaData;int ret = WSAStartup(MAKEWORD(2, 4), &wsaData);if (0 != ret){fputs("WSAStartup error\n", stderr);return 1;}//创建套接字SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if (INVALID_SOCKET == sock) {fputs("socket() error\n", stderr);WSACleanup();return 1;}//绑定套接字SOCKADDR_IN sockAddr;memset(&sockAddr,0,sizeof(SOCKADDR_IN));sockAddr.sin_family = AF_INET;//协议簇，一般用AF_INET表示TCP/IP协议sockAddr.sin_addr.S_un.S_addr = htonl(ADDR_ANY);//表示IP地址sockAddr.sin_port = htons(7);//表示端口ret = bind(sock, (SOCKADDR*)&sockAddr, sizeof(sockAddr));if (SOCKET_ERROR == ret) {fputs("bind() error\n", stderr);closesocket(sock);WSACleanup();return 1;}//侦听套接字ret = listen(sock, BACK_LOG);if (SOCKET_ERROR == ret) {fputs("listen() error\n", stderr);closesocket(sock);WSACleanup();return 1;}//接收套接字SOCKADDR_IN clientAddr;int szClientAddr = sizeof(clientAddr);SOCKET clientSock = accept(sock, (SOCKADDR*)&clientAddr, &szClientAddr);if (INVALID_SOCKET == clientSock){fputs("accept() error\n", stderr);closesocket(sock);WSACleanup();return 1;}//收发数据TCHAR buff[256];memset(&buff,0,sizeof(buff));recv(sock,buff,sizeof(buff),0);//recv()返回读入的字节数TCHAR buff2[] = "QUIT\n";send(sock, buff2, sizeof(buff2), 0);//成功则返回实际传送出去的字符数//回收资源closesocket(sock);closesocket(clientSock);WSACleanup();return 0;}

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