#240: Implemented block for extraction of information from cipher mode command messages
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@ -58,6 +58,7 @@
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<block>gsm_message_file_source</block>
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<block>gsm_extract_system_info</block>
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<block>gsm_extract_immediate_assignment</block>
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<block>gsm_extract_cmc</block>
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<block>gsm_controlled_rotator_cc</block>
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<block>gsm_controlled_fractional_resampler_cc</block>
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<block>gsm_message_printer</block>
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@ -20,6 +20,7 @@
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install(FILES
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gsm_extract_system_info.xml
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gsm_extract_immediate_assignment.xml
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gsm_extract_cmc.xml
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gsm_controlled_rotator_cc.xml
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gsm_message_printer.xml
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gsm_bursts_printer.xml
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@ -0,0 +1,20 @@
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<?xml version="1.0"?>
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<block>
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<name>Extract Cipher Mode Command</name>
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<key>gsm_extract_cmc</key>
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<import>import grgsm</import>
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<make>grgsm.extract_cmc()</make>
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<sink>
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<name>msgs</name>
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<type>message</type>
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</sink>
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<doc>
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Extracts the framenumber and the assigned encryption algorithm from Cipher Mode Commands.
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Input: decoded control channel messages
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The information can be retrieved using following functions:
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get_frame_numbers(), get_a5_versions()
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</doc>
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</block>
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@ -28,6 +28,7 @@ install(FILES
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message_file_source.h
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extract_system_info.h
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extract_immediate_assignment.h
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extract_cmc.h
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controlled_rotator_cc.h
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message_printer.h
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tmsi_dumper.h
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@ -0,0 +1,59 @@
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/* -*- c++ -*- */
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/*
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* @file
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* @author 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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#ifndef INCLUDED_GSM_EXTRACT_CMC_H
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#define INCLUDED_GSM_EXTRACT_CMC_H
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#include <grgsm/api.h>
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#include <gnuradio/block.h>
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#include <vector>
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namespace gr {
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namespace gsm {
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/*!
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* \brief <+description of block+>
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* \ingroup gsm
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*
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*/
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class GRGSM_API extract_cmc : virtual public gr::block
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{
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public:
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typedef boost::shared_ptr<extract_cmc> sptr;
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/*!
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* \brief Return a shared_ptr to a new instance of gsm::extract_cmc.
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*
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* To avoid accidental use of raw pointers, gsm::extract_cmc's
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* constructor is in a private implementation
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* class. gsm::extract_cmc::make is the public interface for
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* creating new instances.
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*/
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static sptr make();
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virtual std::vector<int> get_framenumbers() = 0;
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virtual std::vector<int> get_a5_versions() = 0;
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};
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} // namespace gsm
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} // namespace gr
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#endif /* INCLUDED_GSM_EXTRACT_CMC_H */
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@ -62,6 +62,7 @@ list(APPEND grgsm_sources
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misc_utils/bursts_printer_impl.cc
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misc_utils/extract_system_info_impl.cc
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misc_utils/extract_immediate_assignment_impl.cc
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misc_utils/extract_cmc_impl.cc
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qa_utils/burst_sink_impl.cc
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qa_utils/burst_source_impl.cc
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qa_utils/message_source_impl.cc
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@ -0,0 +1,90 @@
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/* -*- c++ -*- */
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/*
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* @file
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* @author 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] & 0xF) == 0x6 && 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;
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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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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, _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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@ -0,0 +1,45 @@
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/* -*- c++ -*- */
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/*
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* @file
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* @author 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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#ifndef INCLUDED_GSM_EXTRACT_CMC_IMPL_H
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#define INCLUDED_GSM_EXTRACT_CMC_IMPL_H
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#include <grgsm/misc_utils/extract_cmc.h>
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#include <vector>
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namespace gr {
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namespace gsm {
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class extract_cmc_impl : public extract_cmc
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{
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private:
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void process_messages(pmt::pmt_t msg);
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std::vector<int> d_framenumbers;
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std::vector<int> d_a5_versions;
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public:
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virtual std::vector<int> get_framenumbers();
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virtual std::vector<int> get_a5_versions();
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extract_cmc_impl();
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~extract_cmc_impl();
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};
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} // namespace gsm
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} // namespace gr
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#endif /* INCLUDED_GSM_EXTRACT_CMC_IMPL_H */
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@ -31,6 +31,7 @@
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#include "grgsm/misc_utils/tmsi_dumper.h"
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#include "grgsm/misc_utils/burst_file_sink.h"
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#include "grgsm/misc_utils/burst_file_source.h"
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#include "grgsm/misc_utils/extract_cmc.h"
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#include "grgsm/qa_utils/burst_sink.h"
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#include "grgsm/qa_utils/burst_source.h"
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#include "grgsm/qa_utils/message_source.h"
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@ -101,6 +102,8 @@ GR_SWIG_BLOCK_MAGIC2(gsm, message_file_source);
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GR_SWIG_BLOCK_MAGIC2(gsm, msg_to_tag);
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%include "grgsm/misc_utils/controlled_fractional_resampler_cc.h"
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GR_SWIG_BLOCK_MAGIC2(gsm, controlled_fractional_resampler_cc);
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%include "grgsm/misc_utils/extract_cmc.h"
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GR_SWIG_BLOCK_MAGIC2(gsm, extract_cmc);
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%include "grgsm/qa_utils/burst_sink.h"
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