//******************************CLASS TCommunication For TCP****************************************************
__fastcall TCommunication::TCommunication(SOCKET m_Socket,bool CreateSuspended):TThread(FALSE)
{
m_AcceptSocket=m_Socket;
szTmp[0]='\0';
FreeOnTerminate=true;
}
__fastcall TCommunication::~TCommunication()
{
// closesocket(m_AcceptSocket);
}
void __fastcall TCommunication::Execute()
{
char buf[4096];
int nSize=0;
nSize=recv(m_AcceptSocket,(char FAR*)buf,4096,0);
if(nSize>0)
{
buf[nSize]='\0';
//Display
PSTNForm->Memo1->Lines->Add("Received Length:"+String(nSize));
PSTNForm->Memo1->Lines->Add("Received:"+StrPas(buf));
//Deliver
::Sleep(100);
send(m_AcceptSocket,buf,nSize,0);
}
}
//******************************CLASS TListenThread*****************************************************
__fastcall TListenThread::TListenThread(PROTO m_ProtocolA,UINT m_PortA,bool CreateSuspended):TThread(FALSE)
{
m_Socket=INVALID_SOCKET;
m_Port=m_PortA;
m_Protocol=m_ProtocolA;
szTmp[0]='\0';
::ZeroMemory(&wsaData,sizeof(WSAData));
::ZeroMemory(&server,sizeof(struct sockaddr_in));
FreeOnTerminate=TRUE;//Automatically delete while terminating.
}
__fastcall TListenThread::~TListenThread()
{
closesocket(m_Socket);
::WSACleanup();
m_Socket=INVALID_SOCKET;
m_Port=0;
m_Protocol=TCP;
szTmp[0]='\0';
::ZeroMemory(&wsaData,sizeof(WSAData));
::ZeroMemory(&server,sizeof(struct sockaddr_in));
}
void __fastcall TListenThread::DoError()
{
if(m_Socket!=INVALID_SOCKET) closesocket(m_Socket);
WSACleanup();
return;
}
void __fastcall TListenThread::InitSocket()
{
WORD version=MAKEWORD(2,0);
if(::WSAStartup(version,&wsaData)){
sprintf(szTmp,"Failed to intiailize socket,error no:%d",::WSAGetLastError());
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
}
void __fastcall TListenThread::CreateListenSocket()
{
switch(m_Protocol)
{
case UDP:
m_Socket=socket(AF_INET,SOCK_DGRAM,0);
break;
case TCP:
m_Socket=socket(AF_INET,SOCK_STREAM,0);
break;
default:
sprintf(szTmp,"Error protocol!");
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
break;
}
if(m_Socket==INVALID_SOCKET){
sprintf(szTmp,"Failed to create socket!");
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
}
void __fastcall TListenThread::SetListenSocket()
{
server.sin_family=AF_INET;
server.sin_port=htons(m_Port);
server.sin_addr.S_un.S_addr=INADDR_ANY;
int NewOpenType=SO_SYNCHRONOUS_NONALERT;
if(setsockopt(INVALID_SOCKET,SOL_SOCKET,SO_OPENTYPE,(char*)&NewOpenType,4)){
sprintf(szTmp,"Set socket option error,error no:%d",::WSAGetLastError());
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
}
void __fastcall TListenThread::BindListenSocket()
{
if(bind(m_Socket,(sockaddr*)&server,sizeof(struct sockaddr_in))){
sprintf(szTmp,"Failed to bind socket,error no:%d",::WSAGetLastError());
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
}
void __fastcall TListenThread::ListenSocket()
{
if(listen(m_Socket,SOMAXCONN)){
sprintf(szTmp,"listen error,error no:%d",::WSAGetLastError());
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
//Determine whether there is any connection
FD_ZERO(&FDS);
FD_SET(m_Socket,&FDS);
}
void __fastcall TListenThread::Execute()
{
char buf[4096];
struct sockaddr_in from; //for UDP
int nLen=sizeof(from),nSize=0; //for UDP
InitSocket();
CreateListenSocket();
SetListenSocket();
BindListenSocket();
if(m_Protocol==UDP){
while(!Terminated){
int nSize=recvfrom(m_Socket,buf,4096,0,(struct sockaddr*)&from,&nLen);
if(nSize>0){
buf[nSize]='\0';
PSTNForm->Memo1->Lines->Add("Received Length:"+String(nSize));
PSTNForm->Memo1->Lines->Add("Received:"+StrPas(buf));
::Sleep(100);
sendto(m_Socket,buf,nSize,0,(struct sockaddr*)&from,sizeof(struct sockaddr_in));
}
else return;
}
}
ListenSocket();
struct sockaddr_in client;
int nLength=sizeof(struct sockaddr_in);
while(!Terminated){
int nError=select(1,&FDS,0,0,0);
if(nError<=0) Terminate();
SOCKET m_AcceptSocket=accept(m_Socket,(struct sockaddr*)&client,&nLength);
if(m_AcceptSocket==INVALID_SOCKET){
sprintf(szTmp,"Failed to execute accept,error no:%d",::WSAGetLastError());
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
Terminate();
return;
}
TCommunication *pCThread=new TCommunication(m_AcceptSocket,FALSE);
pCThread->Terminate();
pCThread->WaitFor();
}
}
//************************PSTNForm*********************************************//
__fastcall TPSTNForm::TPSTNForm(TComponent* Owner)
: TForm(Owner)
{
}
void __fastcall TPSTNForm::Button1Click(TObject *Sender)
{
Close();
}
void __fastcall TPSTNForm::Button2Click(TObject *Sender)
{
if(pThread){
pThread->Suspend();
pThread->Terminate();
delete pThread;
pThread=0;
}
UINT m_Port;
try
{
m_Port=Port->Text.ToInt();
}
catch(Exception &e)
{
::MessageBox(0,e.Message.c_str(),"Error",MB_OK+MB_ICONERROR);
return;
}
PROTO m_Protocol;
switch(Prot->ItemIndex)
{
case 0:
m_Protocol=TCP;
break;
case 1:
m_Protocol=UDP;
break;
default:
break;
}
pThread=new TListenThread(m_Protocol,m_Port,FALSE);
//pThread->Terminate();
}
void __fastcall TPSTNForm::FormCreate(TObject *Sender)
{
::SendMessage(Prot->Handle,CB_SETCURSEL,0,1);
}
void __fastcall TPSTNForm::FormDestroy(TObject *Sender)
{
if(pThread){
pThread->Suspend();
pThread->Terminate();}
}
上面的代码，各位可根据自已的需要和针对自已的应用，在数据处理方面加以改进就可以了。
再次声明，上述代码中出现的file:前缀这是csdn文档编辑器自动加的，各位凡是见到file:前缀就表示它是注释部分，特此声明，以免误解。
void __fastcall TListenThread::CreateListenSocket()
{
switch(m_Protocol)
{
case UDP:
m_Socket=socket(AF_INET,SOCK_DGRAM,0);
break;
case TCP:
m_Socket=socket(AF_INET,SOCK_STREAM,0);
break;
default:
sprintf(szTmp,"Error protocol!");
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
break;
}
if(m_Socket==INVALID_SOCKET){
sprintf(szTmp,"Failed to create socket!");
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
}
void __fastcall TListenThread::SetListenSocket()
{
server.sin_family=AF_INET;
server.sin_port=htons(m_Port);
server.sin_addr.S_un.S_addr=INADDR_ANY;
int NewOpenType=SO_SYNCHRONOUS_NONALERT;
if(setsockopt(INVALID_SOCKET,SOL_SOCKET,SO_OPENTYPE,(char*)&NewOpenType,4)){
sprintf(szTmp,"Set socket option error,error no:%d",::WSAGetLastError());
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
}
void __fastcall TListenThread::BindListenSocket()
{
if(bind(m_Socket,(sockaddr*)&server,sizeof(struct sockaddr_in))){
sprintf(szTmp,"Failed to bind socket,error no:%d",::WSAGetLastError());
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
}
void __fastcall TListenThread::ListenSocket()
{
if(listen(m_Socket,SOMAXCONN)){
sprintf(szTmp,"listen error,error no:%d",::WSAGetLastError());
::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
DoError();
return;
}
//Determine whether there is any connection
FD_ZERO(&FDS);
FD_SET(m_Socket,&FDS);
}
void __fastcall TListenThread::Execute()
{
char buf[4096];
struct sockaddr_in from; //for UDP
int nLen=sizeof(from),nSize=0; //for UDP
InitSocket();
CreateListenSocket();
SetListenSocket();
BindListenSocket();
if(m_Protocol==UDP){
while(!Terminated){
int nSize=recvfrom(m_Socket,buf,4096,0,(struct sockaddr*)&from,&nLen);
if(nSize>0){
buf[nSize]='\0';
PSTNForm->Memo1->Lines->Add("Received Length:"+String(nSize));
PSTNForm->Memo1->Lines->Add("Received:"+StrPas(buf));
::Sleep(100);
sendto(m_Socket,buf,nSize,0,(struct sockaddr*)&from,sizeof(struct sockaddr_in));
}
else return;
}
}