Re: TCPSession.isPending() behavior.

[Qiang Cui]

Dear all,

I founded the serverside
TCPSession.isPending(SOCKET_PENDING_INPUT) is goes on
when the clientside of socket is closed abnormally. 
How can I close the serverside TCPSession after the
client-socket is closed abnormally?

Windows 2000, CommonC++1.93.

Any suggestions?

regards.

Server.cpp

// Copyright (C) 1999-2001 Open Source Telecom
Corporation.
//  
// This program is free software; you can redistribute
it and/or modify
// it under the terms of the GNU General Public
License as published by
// the Free Software Foundation; either version 2 of
the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it
will be useful,
// but WITHOUT ANY WARRANTY; without even the implied
warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General
Public License
// along with this program; if not, write to the Free
Software 
// Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
// 
// As a special exception to the GNU General Public
License, permission is 
// granted for additional uses of the text contained
in its release 
// of APE.
// 
// The exception is that, if you link the APE library
with other files
// to produce an executable, this does not by itself
cause the
// resulting executable to be covered by the GNU
General Public License.
// Your use of that executable is in no way restricted
on account of
// linking the APE library code into it.
//
// This exception does not however invalidate any
other reasons why
// the executable file might be covered by the GNU
General Public License.
//
// This exception applies only to the code released
under the 
// name APE.  If you copy code from other releases
into a copy of
// APE, as the General Public License permits, the
exception does
// not apply to the code that you add in this way.  To
avoid misleading
// anyone as to the status of such modified files, you
must delete
// this exception notice from them.
// 
// If you write modifications of your own for APE, it
is your choice
// whether to permit this exception to apply to your
modifications.
// If you do not wish that, delete this exception
notice.  


#include <config.h>
#include <strchar.h>
#include <exception.h>
#include <thread.h>
#include <socket.h>
#include <cstdlib>

#ifdef CCXX_NAMESPACES
using namespace std;
using namespace ost;
#endif

class myTCPSocket : public TCPSocket
{
protected:
 bool OnAccept(const InetHostAddress &ia, tpport_t
port);

public:
 myTCPSocket(InetAddress &ia);
};

class myTCPSession : public TCPSession
{
private:
 static Mutex mutex;
 void Run(void);
 
public:
 myTCPSession(TCPSocket &server);
 static volatile int count;
};

myTCPSocket::myTCPSocket(InetAddress &ia) :
TCPSocket(ia, 4096) {};

bool myTCPSocket::OnAccept(const InetHostAddress &ia,
tpport_t port)
{
 cout << "accepting from: " << ia.getHostname() << ":"
<< port << endl;;
 return true;
}

volatile int myTCPSession::count = 0;

Mutex myTCPSession::mutex;

myTCPSession::myTCPSession(TCPSocket &server) :
TCPSession(server)
{
 cout << "creating session client object" << endl;
 mutex.EnterMutex();
 ++count;
 mutex.LeaveMutex();
 unsetf(ios::binary);
}

void myTCPSession::Run(void)
{
 try{
  char buf[1000];
  InetAddress addr = getLocal();
  while(isPending(SOCKET_PENDING_INPUT) ) 
  {
   *tcp() >> buf;
   *tcp() << buf << endl;
   flush();
  }

 }
 catch(Socket *socket)
 {
  tpport_t port;
  int err = socket->getErrorNumber();
  InetAddress saddr =
(InetAddress)socket->getPeer(&port);
  cerr << "socket error " << saddr.getHostname() <<
":" << port << " = " << err << endl; 
  if(err == SOCKET_BINDING_FAILED)
  {
   cerr << "bind failed; port busy" << endl;
   ::exit(-1);
  }
  else
   cerr << "client socket failed" << endl;
  Final();
 }
}


int main()
{
 myTCPSession *tcp;
 InetAddress addr;
 addr = "255.255.255.255";
 cout << "testing addr: " << addr << ":" << 4096 <<
endl;
 addr = "192.168.1.1";
 cout << "binding for: " << addr << ":" << 4096 <<
endl;

 try
 {
  myTCPSocket server(addr);

  while(true)
  {
   cout << "before create" << endl;
   tcp = new myTCPSession(server);
   cout << "after create" << endl;
   tcp->Start();
  }
 }
 catch(Socket *socket)
 {
  tpport_t port;
  int err = socket->getErrorNumber();
  InetAddress saddr =
(InetAddress)socket->getPeer(&port);
  cerr << "socket error " << saddr.getHostname() <<
":" << port << " = " << err << endl; 
  if(err == SOCKET_BINDING_FAILED)
  {
   cerr << "bind failed; port busy" << endl;
   ::exit(-1);
  }
  else
   cerr << "client socket failed" << endl;
 }
 cout << "timeout after 30 seconds inactivity,
exiting" << endl;
}

 


Client.cpp

#include <config.h>
#include <strchar.h>
#include <exception.h>
#include <thread.h>
#include <socket.h>
#include <iostream>
#include <stdio.h>

#ifdef CCXX_NAMESPACES
using namespace std;
using namespace ost;
#endif

int main(int argc, char *argv[])
{
  char buf[1024];
  
  InetHostAddress addr = "192.168.1.1";
  cout << "binding for: " << addr << ":" << 4096 <<
endl;
  TCPStream client(addr,4096,2048,false);
  
  try
    {
 client << "abc" << endl;
      // the last parameter indicates not to throw
exceptions
  client >> buf;
  cout << buf << endl;

    } 

  catch (Socket *s) 
    {
      cout << "exception thrown: " <<
s->getErrorString() << endl;
    }
  
  return 0;
}

 

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