multi_sniffer_impl.h

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/* -*- c++ -*- */
/* 
 * Copyright 2013 Christopher D. Kilgour
 * Copyright 2008, 2009 Dominic Spill, Michael Ossmann
 * Copyright 2007 Dominic Spill
 * Copyright 2005, 2006 Free Software Foundation, Inc.
 * 
 * This file is part of gr-bluetooth
 * 
 * This 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, or (at your option)
 * any later version.
 * 
 * This software 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 software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef INCLUDED_BLUETOOTH_GR_BLUETOOTH_MULTI_SNIFFER_IMPL_H
#define INCLUDED_BLUETOOTH_GR_BLUETOOTH_MULTI_SNIFFER_IMPL_H

#include "gr_bluetooth/multi_sniffer.h"
#include "gr_bluetooth/packet.h"
#include "gr_bluetooth/piconet.h"
#include "tun.h"
#include <map>

namespace gr {
  namespace bluetooth {

    class multi_sniffer_impl : virtual public multi_sniffer
    {
    private:
      /* General Inquiry and Limited Inquiry Access Codes */
      static const uint32_t GIAC = 0x9E8B33;
      static const uint32_t LIAC = 0x9E8B00;

      /* Using tun for output */
      bool d_tun;

      /* Tun stuff */
      int d_tunfd;
      char d_chan_name[20];
      unsigned char d_ether_addr[ETH_ALEN];
      static const unsigned short ETHER_TYPE = 0xFFF0;

      /* the piconets we are monitoring */
      std::map<int, basic_rate_piconet::sptr> d_basic_rate_piconets;
      std::map<uint32_t, low_energy_piconet::sptr> d_low_energy_piconets;

      /* handle AC */
      void ac(char *symbols, int len, double freq, double snr);

      /* handle AA */
      void aa(char *symbols, int len, double freq, double snr);

      /* handle ID packet (no header) */
      void id(uint32_t lap);

      /* decode packets with headers */
      void decode(classic_packet::sptr pkt, basic_rate_piconet::sptr pn,
                  bool first_run);
      void decode(le_packet::sptr pkt, low_energy_piconet::sptr pn);

      /* work on UAP/CLK1-6 discovery */
      void discover(classic_packet::sptr pkt, basic_rate_piconet::sptr pn);
      void discover(le_packet::sptr pkt, low_energy_piconet::sptr pn);

      /* decode stored packets */
      void recall(basic_rate_piconet::sptr pn);
      void recall(low_energy_piconet::sptr pn);

      /* pull information out of FHS packet */
      void fhs(classic_packet::sptr pkt);

    public:
      multi_sniffer_impl(double sample_rate, double center_freq, double squelch_threshold, bool tun);
      ~multi_sniffer_impl();

      // Where all the action really happens
      int work(int                        noutput_items,
               gr_vector_const_void_star& input_items,
               gr_vector_void_star&       output_items);
    };

  } // namespace bluetooth
} // namespace gr

#endif /* INCLUDED_BLUETOOTH_GR_BLUETOOTH_MULTI_SNIFFER_IMPL_H */