src/pppfilter.h

   1 ///
   2 /// \file       pppfilter.h
   3 ///             Data filter class, to morph PPP data into something that
   4 ///             the Blackberry / Rogers / ISP can handle.
   5 ///             This logic is based partly on XmBlackBerry's
   6 ///             gprs_protocol_fix.c program.
   7 ///
   8
   9 /*
  10     Copyright (C) 2008-2011, Net Direct Inc. (http://www.netdirect.ca/)
  11
  12     This program is free software; you can redistribute it and/or modify
  13     it under the terms of the GNU General Public License as published by
  14     the Free Software Foundation; either version 2 of the License, or
  15     (at your option) any later version.
  16
  17     This program is distributed in the hope that it will be useful,
  18     but WITHOUT ANY WARRANTY; without even the implied warranty of
  19     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  20
  21     See the GNU General Public License in the COPYING file at the
  22     root directory of this project for more details.
  23 */
  24
  25 #ifndef __BARRY_M_PPPFILTER_H__
  26 #define __BARRY_M_PPPFILTER_H__
  27
  28 #include "dll.h"
  29 #include "data.h"
  30
  31 namespace Barry {
  32
  33 class BXEXPORT PppFilter
  34 {
  35 private:
  36         Data m_writeBuf;                        // used for 0x7e handling
  37
  38         // write flags
  39         bool m_ppp_mode;
  40         unsigned char m_last;
  41
  42         BXLOCAL const Data& GetBuffer() const;  // not implemented, since
  43                 // Write can return either m_writeBuf or data, and
  44                 // so this would be useless and unsafe
  45
  46         BXLOCAL void Filter(Data &dest, const Data &src, unsigned int destoffset);
  47
  48 public:
  49         PppFilter();
  50
  51         bool PppMode() const { return m_ppp_mode; }
  52         const Data& Write(const Data &data);
  53         Data& Write(const Data &data, unsigned int prepend);
  54 };
  55
  56 } // namespace Barry
  57
  58 #endif
  59