//六步创建TCP服务端
#include<iostream>
#include<Windows.h>
using namespace std;int main()
{//初始化ws2_32.dllWORD ver = MAKEWORD(2, 2);WSADATA wsaData;WSAStartup(ver, &wsaData);//对应WSACleanup的调用//1.建立一个socketSOCKET _sock = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if (_sock == INVALID_SOCKET){cout<<"创建socket失败" << endl;WSACleanup();return 0;}else{cout << "创建socket成功" << endl;}//填充sockaddr_in结构sockaddr_in sin;sin.sin_family = AF_INET;sin.sin_port = htons(1234);sin.sin_addr.S_un.S_addr = INADDR_ANY;//2.绑定端口if (bind(_sock, (sockaddr*)&sin, sizeof(sin)) == SOCKET_ERROR){cout << "绑定端口失败" << endl;WSACleanup();return 0;}else{cout << "绑定端口成功" << endl;}//3.Listen监听网络端口if (listen(_sock, 10) == SOCKET_ERROR){cout << "监听端口失败" << endl;WSACleanup();return 0;}else{cout << "监听端口成功" << endl;}//4.accept等待客户端连接sockaddr_in clientAddr;int nAddrLen= sizeof(clientAddr);SOCKET client;char buf[] = "Hello,I am Server.";while (true){client = accept(_sock, (sockaddr*)&clientAddr, &nAddrLen);if (client == INVALID_SOCKET){cout << "接受到无效客户端" << endl;WSACleanup();return 0;}else{cout << "接受客户端连接成功" << endl;}cout << "新客户端连接IP： " << inet_ntoa(clientAddr.sin_addr) << endl;//5.send向客户端发送一条数据send(client, buf, strlen(buf) + 1, 0);}//6.关闭套接字closesocketclosesocket(client);closesocket(_sock);//清楚windows socket环境WSACleanup();system("pause");return 0;
}