Socket网络编程——C++实现

本代码可直接使用 根据TCP/IP三次握手，实验时可使用两台电脑，或者打开两个终端模拟通信。

服务器端：

#include <iostream>
#include <windows.h>using namespace std;#pragma comment(lib,"ws2_32.lib") //引用静态链接库void main()
{WORD wVersionRequested;WSADATA wsaData;int err;wVersionRequested = MAKEWORD(2,2);   err =WSAStarup( wVersionRequested,&wsaData);if( err != 0).0{//tell the user that we could nto find a usable//WinSock DLL;return;}if(LOBYTE(wsaData.wVersion)!=2||HIBYTE(wsaData.wVersion)!=2){WSACleanup();return;}//The WinSock DLL is acceptable,Proceed  windows下版本的协商SOCKET sockSer;//服务器套接字 sockSer = socket(AF_INET,SOCK_STREAM,0);//创建套接字，AF_INET代表IP家族,0是默认的方式创建  有连接是流式 无连接是数据包套接字SOCKADDR_IN addrSer,addrCli;addrSer.sin_family = AF_INET;addrSer.sin_port = htons(5050);addrSer.sin_addr.S_un.S_addr = inet_addr("192.168.3.173");bind(sockSer,(SOCKADDR)*&addrSer,sizeof(SOCKADDR));//绑定套接字 跟服务器的相关地址信息进行绑定listen(sockSer,5);//监听套接字 5是队列大小SOCKET sockConn;//给出一个相应的套接字int len = sizeof(SOCKADDR);cout<<"Server Wait Client Connect......."<<endl;sockConn = accept(sockSer,(SOCKADDR*)&addrCli,&len);//处理新到连接 3个参数分别是服务器的套接字号；客户端地址，相应地址层度的地址以地址形式传递if(sockConn == INVALID_SOCKET)；//INVALID_SOCKET非法套接字{cout<<"Server Accept Client Connect Fail"<<endl;return;}else{cout<<"Server Accept Client Connect Success"<<endl;return;}char sendbuf[256];char recvbuf[256];while(1){cout<<"Ser：>"cin>>sendbuf;//缓冲区if(strcmp(sendbuf,"quit")==0);//相等表示服务器请求退出{break;}send(sockConn,sendbuf,strlen(sendbuf)+1,0);//发送服务器 +1为了字符串的/0  3个参数分别是要发送的套接字，缓冲，长度recv(sockConn,recvbuf,256,0);//接收cout<<"Cli:>"<<recvbuf<<endl;}closesocket(sockSer);//WSACleanup();//清除版本信息}

用户端：

#include <iostream>
#include <windows.h>using namespace std;#pragma comment(lib,"ws2_32.lib")void main()
{WORD wVersionRequested;WSADATA wsaData;int err;wVersionRequested = MAKEWORD(2,2);err =WSAStarup( wVersionRequested,&wsaData);if( err != 0){//tell the user that we could nto find a usable//WinSock DLL;return;}if(LOBYTE(wsaData.wVersion)!=2||HIBYTE(wsaData.wVersion)!=2){WSACleanup();return;}//The WinSock DLL is acceptable,Proceed  windows下版本的协商SOCKET sockSli;//服务器套接字sockSli = socket(AF_INET,SOCK_STREAM,0);//创建套接字  家族协议；流式套接字；默认值SOCKADDR_IN addrSer;//addrSer.sin_family = AF_INET;addrSer.sin_port = htons(5050);addrSer.sin_addr.S_un.S_addr = inet_addr ("127.0.0.1");int res = connect(sockCli,(SOCKADDR*)&addrSer,sizeof(SOCKADDR));//res为connect返回值 查阅相关函数，若为0则表示没有错误if (res != 0){cout<<"Client Connect Servrer Fail!"<<endl;return;}else{cout<<"Client Connect Servrer Success!"<<endl;}char sendbuf[256];char recvbuf[256];//发空间和接收空间while(1){recv(sockCli,recvbuf,256,0);cout<<"Ser:>"<<recvbuf<<endl;cout<<"Cli:>";cin>>sendbuf;if(strcmp(sendbuf,"quit") == 0)//客户端请求退出{break;}send(sockCli,sendbuf,strlen(sendbuf)+1,0);}closesocket(sockCli);WSACleanup();
}