基於TCP的網絡編程

服務器端程序

#include<Winsock2.h>
#include<stdio.h>
#pragma comment (lib,"ws2_32.lib")




int main()
{
//加載套接字庫
WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested=MAKEWORD(1,1);

err=WSAStartup(wVersionRequested,&wsaData);

if(err!=0)
{
return 1;
}

if(LOBYTE(wsaData.wVersion)!=1||HIBYTE(wsaData.wVersion)!=1)
{
WSACleanup();
return 2;
}

/*printf("Version: %d.%d\n",LOBYTE(wsaData.wVersion),HIBYTE(wsaData.wVersion));//註釋1
    printf("High Version: %d.%d\n", LOBYTE(wsaData.wHighVersion),HIBYTE(wsaData.wHighVersion) );//註釋2
    printf("Description: %s\n",wsaData.szDescription );//註釋3
    printf("System Status: %s\n",wsaData.szSystemStatus );//註釋4*/

//創建用於監聽的套接字
SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
addrSrv.sin_family=AF_INET;
addrSrv.sin_port=htons(60000);

//綁定套接字
bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
listen(sockSrv,5);

SOCKADDR_IN addrClient;
int len=sizeof(SOCKADDR);

while(1)
{
//等待客戶請求
SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);
char sendBuf[100];
sprintf(sendBuf,"Welcome %s",inet_ntoa(addrClient.sin_addr));
//發送數據
send(sockConn,sendBuf,strlen(sendBuf)+1,0);
char recvBuf[100];
//接收數據
recv(sockConn,recvBuf,100,0);
//打印接收的數據
printf("%s\n",recvBuf);
//關閉套接字
closesocket(sockConn);
}
return 0;

}

客戶端程序

#include<Winsock2.h>
#include<stdio.h>
#pragma comment (lib,"ws2_32.lib")
#include <windows.h> 


int main()
{
//加載套接字庫
WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested=MAKEWORD(1,1);

err=WSAStartup(wVersionRequested,&wsaData);

if(err!=0)
{
return 1;
}

if(LOBYTE(wsaData.wVersion)!=1||HIBYTE(wsaData.wVersion)!=1)
{
WSACleanup();
return 2;
}
//創建套接字
SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);


SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
addrSrv.sin_family=AF_INET;
addrSrv.sin_port=htons(6000);
//向服務器發出連接請求
connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));


//接收數據
char recvBuf[100];
recv(sockClient,recvBuf,100,0);
printf("s%",recvBuf);
//發送數據
send(sockClient,"This is lisi",strlen("This is lisi")+1,0);
//關閉套接字
Sleep(3000);
closesocket(sockClient);
WSACleanup();
return 0;
}