97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
/* -*- c++ -*- */
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/*
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* @file
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* @author (C) 2016 by Roman Khassraf <rkhassraf@gmail.com>
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* @section LICENSE
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*
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* Gr-gsm is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* Gr-gsm is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with gr-gsm; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gnuradio/io_signature.h>
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#include <grgsm/gsmtap.h>
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//#include <unistd.h>
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#include <grgsm/endian.h>
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#include "extract_cmc_impl.h"
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namespace gr {
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namespace gsm {
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void extract_cmc_impl::process_messages(pmt::pmt_t msg)
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{
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pmt::pmt_t message_plus_header_blob = pmt::cdr(msg);
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uint8_t * message_plus_header = (uint8_t *)pmt::blob_data(message_plus_header_blob);
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gsmtap_hdr * header = (gsmtap_hdr *)message_plus_header;
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uint8_t * msg_elements = (uint8_t *)(message_plus_header+sizeof(gsmtap_hdr));
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if((msg_elements[3] & 0xFF) == 0x06 && msg_elements[4] == 0x35)
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{
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int frame_nr = be32toh(header->frame_number);
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int a5_version = ((msg_elements[5] & 0xE) >> 1) + 1; //10.5.2.9 Cipher Mode Setting
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int start_ciphering = ((msg_elements[5] & 0x1));
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d_start_ciphering.push_back(start_ciphering);
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d_framenumbers.push_back(frame_nr);
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d_a5_versions.push_back(a5_version);
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}
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}
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std::vector<int> extract_cmc_impl::get_framenumbers()
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{
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return d_framenumbers;
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}
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std::vector<int> extract_cmc_impl::get_a5_versions()
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{
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return d_a5_versions;
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}
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std::vector<int> extract_cmc_impl::get_start_ciphering()
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{
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return d_start_ciphering;
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}
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extract_cmc::sptr
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extract_cmc::make()
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{
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return gnuradio::get_initial_sptr
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(new extract_cmc_impl());
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}
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/*
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* The private constructor
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*/
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extract_cmc_impl::extract_cmc_impl()
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: gr::block("extract_cmc",
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gr::io_signature::make(0, 0, 0),
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gr::io_signature::make(0, 0, 0))
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{
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message_port_register_in(pmt::mp("msgs"));
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set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_cmc_impl::process_messages, this, boost::placeholders::_1));
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}
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/*
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* Our virtual destructor.
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*/
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extract_cmc_impl::~extract_cmc_impl()
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{
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}
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} /* namespace gsm */
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} /* namespace gr */
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