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PortGenerator.hpp

00001  /***********************************************************************
00002  *                                                                      *
00003  * ViTooKi                                                              *
00004  *                                                                      *
00005  * title:       PortGenerator.hpp                                             *
00006  *                                                                      *
00007  *                                                                      *
00008  *                                                                      *
00009  * ITEC institute of the University of Klagenfurt (Austria)             *
00010  * http://www.itec.uni-klu.ac.at                                        *
00011  *                                                                      *
00012  *                                                                      *
00013  * For more information visit the ViTooKi homepage:                     *
00014  * http://ViTooKi.sourceforge.net                                       *
00015  * vitooki-user@lists.sourceforge.net                                   *
00016  * vitooki-devel@lists.sourceforge.net                                  *
00017  *                                                                      *
00018  * This file is part of ViTooKi, a free video toolkit.                  *
00019  * ViTooKi is free software; you can redistribute it and/or             *
00020  * modify it under the terms of the GNU General Public License          *
00021  * as published by the Free Software Foundation; either version 2       *
00022  * of the License, or (at your option) any later version.               *
00023  *                                                                      *
00024  * This program is distributed in the hope that it will be useful,      *
00025  * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
00026  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the         *
00027  * GNU General Public License for more details.                         *
00028  *                                                                      *
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00032  * MA  02111-1307, USA.                                                 *
00033  *                                                                      *
00034  ***********************************************************************/
00035 
00036  /***********************************************************************
00037  *                                                                      *
00038  *  REVISION HISTORY:                                                   *
00039  *                                                                      *
00040  *                                                                      *
00041  *                                                                      *
00042  ***********************************************************************/
00043 
00044 #ifndef _MK_PORTGENERATOR_HPP_
00045 #define _MK_PORTGENERATOR_HPP_
00046 
00047 #include "global.hpp"
00048 
00049 #define PROT_UDP 1
00050 #define PROT_TCP 0
00051 #define PORT_OFFS 19998
00052 #define PORT_RANGE 20000
00053 
00065 class PortGenerator {
00066 
00067  public:
00068         PortGenerator();
00069         virtual ~ PortGenerator();
00070 
00071         /* randomly finds two consequtive udp ports for eg. RTSP handshake usage.
00072          * first port is even, second is first_port+1, so its always odd 
00073          * @returns the first and even port number
00074          */
00075         int getNextFreePortPair(int proto=PROT_UDP);
00076 
00077 
00078         /* use this to request a certain single port to be socket()ized and bind()
00079          * @returns the socket fd on success or zero
00080          */
00081         int setSockAndPort(int port, int proto=PROT_UDP);
00082 
00083         /* @returns the socket fd on success or zero */
00084         int getSockFromPort(int port, int proto=PROT_UDP);
00085 
00086         /* closes the port and socket
00087          * @returns true on success or false else */
00088         bool closePort(int port, int proto=PROT_UDP);
00089 
00090         /* closes the consequtive port pair and according sockets
00091          * @returns true on success or false else */
00092         bool closePortPair(int port, int proto=PROT_UDP);
00093   
00094 protected:
00095         void initialize();
00096 
00097         int UDPsocketOf[PORT_RANGE];
00098         int TCPsocketOf[PORT_RANGE];
00099 };
00100 
00101 #endif