Socket網絡編程——C++實現

本代碼可直接使用 根據TCP/IP三次握手，實驗時可使用兩臺電腦，或者打開兩個終端模擬通信。

服務器端：

#include <iostream>
#include <windows.h>using namespace std;#pragma comment(lib,"ws2_32.lib") //引用靜態鏈接庫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下版本的協商SOCKET sockSer;//服務器套接字 sockSer = socket(AF_INET,SOCK_STREAM,0);//創建套接字，AF_INET代表IP家族,0是默認的方式創建  有連接是流式 無連接是數據包套接字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));//綁定套接字 跟服務器的相關地址信息進行綁定listen(sockSer,5);//監聽套接字 5是隊列大小SOCKET sockConn;//給出一個相應的套接字int len = sizeof(SOCKADDR);cout<<"Server Wait Client Connect......."<<endl;sockConn = accept(sockSer,(SOCKADDR*)&addrCli,&len);//處理新到連接 3個參數分別是服務器的套接字號；客戶端地址，相應地址層度的地址以地址形式傳遞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;//緩沖區if(strcmp(sendbuf,"quit")==0);//相等表示服務器請求退出{break;}send(sockConn,sendbuf,strlen(sendbuf)+1,0);//發送服務器 +1為了字符串的/0  3個參數分別是要發送的套接字，緩沖，長度recv(sockConn,recvbuf,256,0);//接收cout<<"Cli:>"<<recvbuf<<endl;}closesocket(sockSer);//WSACleanup();//清除版本信息}

用戶端：

#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下版本的協商SOCKET sockSli;//服務器套接字sockSli = socket(AF_INET,SOCK_STREAM,0);//創建套接字  家族協議；流式套接字；默認值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為connect返回值 查閱相關函數，若為0則表示沒有錯誤if (res != 0){cout<<"Client Connect Servrer Fail!"<<endl;return;}else{cout<<"Client Connect Servrer Success!"<<endl;}char sendbuf[256];char recvbuf[256];//發空間和接收空間while(1){recv(sockCli,recvbuf,256,0);cout<<"Ser:>"<<recvbuf<<endl;cout<<"Cli:>";cin>>sendbuf;if(strcmp(sendbuf,"quit") == 0)//客戶端請求退出{break;}send(sockCli,sendbuf,strlen(sendbuf)+1,0);}closesocket(sockCli);WSACleanup();
}