基于TCP的服务器和客户端的简单收发Demo

/*   服务器端

*/

#include <WinSock2.h>

#include <iostream>

#include <stdlib.h>

using namespace std;

#pragma  comment (lib,"WS2_32.lib")

#define  BUFFSIZE     512

int main()

{
WSADATA wsd;
SOCKET SServer,SClient;
int returnval,ClientLength;
char buf[BUFFSIZE];                //     接收数据的缓冲区
SOCKADDR_IN addServer,addClient;           //服务器端和客户端的地址
if ((WSAStartup(MAKEWORD(2,2),&wsd))!=0)               //初始化Socket动态库
{
cout<<"WSAStartup Fail"<<endl;
return -1;
}

SServer=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);        //创建服务器端的Socket
if (SServer==INVALID_SOCKET)
{
cout<<"Socket Create Fail"<<endl;
WSACleanup();
return -1;
}
addServer.sin_family=AF_INET;
addServer.sin_port=htons(9990);             //监听端口号
addServer.sin_addr.S_un.S_addr=htonl(INADDR_ANY);

returnval=bind(SServer,(const struct sockaddr*)&addServer,sizeof(SOCKADDR_IN));      //  绑定 Socket 到本地地址
if (returnval==SOCKET_ERROR)
{
cout<<"Bind Fail"<<endl;
closesocket(SServer);
WSACleanup();
return -1;
}

returnval=listen(SServer,5);         //  监听,并将连接队列设置为5
if (returnval==SOCKET_ERROR)
{
cout<<"Listen Fail"<<endl;
closesocket(SServer);
WSACleanup();
return -1;
}

cout<<"TCP Server Start……"<<endl;
ClientLength=sizeof(addClient);
SClient=accept(SServer,(sockaddr FAR*)&addClient,&ClientLength);            //   接收来自客户端的请求
if (SClient==SOCKET_ERROR)
{
cout<<"Accept Fail"<<endl;
closesocket(SServer);
WSACleanup();
return -1;
}
while(1)
{
memset(buf,0,sizeof(buf));
returnval=recv(SClient,buf,BUFFSIZE,0);              //接收数据
if (returnval==SOCKET_ERROR)
{
cout<<"Rece  Fail"<<endl;
closesocket(SServer);
closesocket(SClient);
WSACleanup();
return -1;
}
SYSTEMTIME    ST;                   //  获取当前的系统时间
GetLocalTime(&ST);
cout<<ST.wYear<<"/"<<ST.wMonth<<"/"<<ST.wDay<<"  "<<ST.wHour<<":"<<ST.wMinute<<":"<<ST.wSecond<<" :";
cout<<"Recv From Client: "<<inet_ntoa(addClient.sin_addr)<<" Data:  "<<buf<<endl;           //显示来自客户端的地址信息
if (strcmp(buf,"quit")==0)                  // 如果收到的是quit字符，则退出服务器
{
returnval=send(SClient,"quit",strlen("quit"),0);
break;
} 
else
{
char mssage[BUFFSIZE];
sprintf(mssage,"Message received----%s",buf);        
returnval=send(SClient,mssage,strlen(mssage),0);                            // 想客户端发送 回显的字符串
if (returnval==SOCKET_ERROR)
{
cout<<"Send Fail"<<endl;
closesocket(SServer);
closesocket(SClient);
WSACleanup();
return -1;
}
}
}
closesocket(SServer);
closesocket(SClient);
WSACleanup();
return 0;
}

/*  客户端*/

#include <WinSock2.h>

#include <iostream>

#include <stdlib.h>

#include <string>

using namespace std;

#pragma  comment (lib,"WS2_32.lib")

#define  BUFFSIZE     512

int main()

{
WSADATA wsd;
SOCKET SHost;
int returnval,ClientLength;
char buf[BUFFSIZE];                //     接收数据的缓冲区
string STR;
SOCKADDR_IN addServer,addClient;           //服务器端和客户端的地址
if ((WSAStartup(MAKEWORD(2,2),&wsd))!=0)               //初始化Socket动态库
{
cout<<"WSAStartup Fail"<<endl;
return -1;
}

SHost=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);        //创建服务器端的Socket
if (SHost==INVALID_SOCKET)
{
cout<<"Socket Create Fail"<<endl;
WSACleanup();
return -1;
}
addServer.sin_family=AF_INET;
addServer.sin_port=htons(9990);             //监听端口号
addServer.sin_addr.S_un.S_addr=inet_addr("127.22.64.1");                 //客户端的IP地址

    returnval=conne
4000
ct(SHost,(LPSOCKADDR)&addServer,sizeof(addServer));            //客户端连接到服务器端
if (returnval==SOCKET_ERROR)
{
cout<<"Connect Fail"<<endl;
closesocket(SHost);
WSACleanup();
return -1;
}
while(1)
{
memset(buf,0,sizeof(buf));
cout<<"Input a string to send:";
getline(cin,STR);
strcpy(buf,STR.c_str());
returnval=send(SHost,buf,strlen(buf),0);
if (returnval==SOCKET_ERROR)
{
cout<<"Send Fail"<<endl;
closesocket(SHost);
WSACleanup();
return -1;
}
returnval=recv(SHost,buf,sizeof(buf)+1,0);
cout<<"Recv from the Server:"<<buf<<endl;
if (strcmp(buf,"quit")==0)
{
cout<<"quit"<<endl;
break;
}
}
closesocket(SHost);
WSACleanup();
return 0;

}