Socket 編程最基本的模型就是
Berkeley Socket
具體的實現也就是按這個流程圖來做的，這里重點是服務端的實現。
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
ofstream logfile("LogFile.txt");
//Initialize winsock
WSADATA wsaData;
int iResult = WSAStartup( MAKEWORD(2,2), &wsaData);
if(iResult != NO_ERROR)
{
logfile<<"Error at WSAStartup() ";
logfile.close();
return 1;
}
else
logfile<<"Initialize WSAStartup OK!";
// Create a socket.
SOCKET serverSocket;
serverSocket = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if(serverSocket == INVALID_SOCKET)
{
logfile<<"Error at socket():"<<WSAGetLastError()<<endl;;
logfile.close();
WSACleanup();
return 1;
}
else
{
logfile<<"Create socket OK!";
}
// Bind the socket.
sockaddr_in service;
service.sin_family=AF_INET;
service.sin_addr.s_addr=inet_addr(HostIp.c_str());
service.sin_port=htons(PORT);
if (bind(serverSocket,(SOCKADDR*)&service,sizeof(service))==SOCKET_ERROR)
{
logfile<<"bind() failed"<<GetLastError()<<endl;
closesocket(serverSocket);
logfile.close();
return 1;
}
else
{
logfile<<"Binding OK!"<<endl;
}
// Listen on the socket.
if(listen(serverSocket,1)==SOCKET_ERROR)
{
logfile<<"Error listening on socket"<<GetLastError()<<endl;
logfile.close();
}
else
{
logfile<<"Listening..."<<endl;
}
// Accept connections.
SOCKET clientSocket;
sockaddr_in clientAddr;
int clientAddrLen=sizeof(clientAddr);
while(true)
{
clientSocket = SOCKET_ERROR;
while(clientSocket==SOCKET_ERROR)
{
clientSocket=accept(serverSocket,(struct sockaddr*)&clientAddr,&clientAddrLen);
}
ReceiveData(clientSocket);
}
closesocket(serverSocket);
closesocket(clientSocket);
return 0;
}
//Receive the data
void ReceiveData(SOCKET& clientSocket)
{
int bytesSent;
int bytesRecv=SOCKET_ERROR;
string sendbuf="";
char recvbuf[32]="";
while(bytesRecv ==SOCKET_ERROR)
{
bytesRecv=recv(clientSocket,recvbuf,32,0);
sendbuf="Received: "+(string)recvbuf;
bytesSent=send(clientSocket,sendbuf.c_str(),(unsigned int)(sendbuf.size()),0);
bytesRecv=SOCKET_ERROR;
memset(recvbuf,'\0',32);
}
return;
}
在接收客戶端發來數據的地方要做成死循環，如果需要斷開連接，則由客戶斷發送特定的消息然后進行處理。還有需要注意的是上面的HostIp是本機的IP地址，PORT是套接字需要綁定的端口。
posted on 2008-02-25 13:40
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socket編程