---

NetworkListener.hpp

Go to the documentation of this file.

/*==========================================================================
 * Copyright (c) 2004 University of Massachusetts.  All Rights Reserved.
 *
 * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
 * is subject to the terms of the software license set forth in the LICENSE
 * file included with this software, and also available at
 * http://www.lemurproject.org/license.html
 *
 *==========================================================================
*/


//
// NetworkListener
//
// 23 March 2004 -- tds
//

#ifndef INDRI_NETWORKLISTENER_HPP
#define INDRI_NETWORKLISTENER_HPP

#include "lemur-compat.hpp"
#include "indri/NetworkStream.hpp"

class NetworkListener {
  socket_t _socket;

public:
  NetworkListener() : _socket(-1) {}
  ~NetworkListener() {
    close();
  }

  bool listen( unsigned int port ) {
    lemur_compat::initializeNetwork();
    _socket = ::socket( AF_INET, SOCK_STREAM, 0 );

    sockaddr_in sa;
    sa.sin_addr.s_addr = INADDR_ANY;
    sa.sin_port = htons(port);
    sa.sin_family = AF_INET;
    memset( &sa.sin_zero, 0, sizeof sa.sin_zero );

    ::bind( _socket, (const sockaddr*) &sa, sizeof sa );
    int result = ::listen( _socket, 8 );

    if( result ) {
      close();
      return false;
    }

    return true;
  }

  NetworkStream* accept() {
    assert( _socket != -1 );
    socket_t s = ::accept( _socket, 0, 0 );
    return new NetworkStream(s);
  }

  void close() {
    lemur_compat::closesocket(_socket);
    _socket = -1;
  }
};

#endif // INDRI_NETWORKLISTENER_HPP

---