| /* -*- c++ -*- */ |
| /* |
| * @file |
| * @author Roman Khassraf <rkhassraf@gmail.com> |
| * @section LICENSE |
| * |
| * Gr-gsm 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 3, or (at your option) |
| * any later version. |
| * |
| * Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <gnuradio/io_signature.h> |
| #include <grgsm/gsmtap.h> |
| #include <unistd.h> |
| #include <grgsm/endian.h> |
| |
| #include "extract_cmc_impl.h" |
| |
| namespace gr { |
| namespace gsm { |
| void extract_cmc_impl::process_messages(pmt::pmt_t msg) |
| { |
| pmt::pmt_t message_plus_header_blob = pmt::cdr(msg); |
| uint8_t * message_plus_header = (uint8_t *)pmt::blob_data(message_plus_header_blob); |
| gsmtap_hdr * header = (gsmtap_hdr *)message_plus_header; |
| uint8_t * msg_elements = (uint8_t *)(message_plus_header+sizeof(gsmtap_hdr)); |
| |
| if((msg_elements[3] & 0xF) == 0x6 && msg_elements[4] == 0x35) |
| { |
| |
| int frame_nr = be32toh(header->frame_number); |
| int a5_version = ((msg_elements[5] & 0xE) >> 1) + 1; //10.5.2.9 Cipher Mode Setting |
| int start_ciphering = ((msg_elements[5] & 0x1)); |
| d_start_ciphering.push_back(start_ciphering); |
| d_framenumbers.push_back(frame_nr); |
| d_a5_versions.push_back(a5_version); |
| } |
| } |
| |
| std::vector<int> extract_cmc_impl::get_framenumbers() |
| { |
| return d_framenumbers; |
| } |
| |
| std::vector<int> extract_cmc_impl::get_a5_versions() |
| { |
| return d_a5_versions; |
| } |
| |
| std::vector<int> extract_cmc_impl::get_start_ciphering() |
| { |
| return d_start_ciphering; |
| } |
| |
| extract_cmc::sptr |
| extract_cmc::make() |
| { |
| return gnuradio::get_initial_sptr |
| (new extract_cmc_impl()); |
| } |
| |
| /* |
| * The private constructor |
| */ |
| extract_cmc_impl::extract_cmc_impl() |
| : gr::block("extract_cmc", |
| gr::io_signature::make(0, 0, 0), |
| gr::io_signature::make(0, 0, 0)) |
| { |
| message_port_register_in(pmt::mp("msgs")); |
| set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_cmc_impl::process_messages, this, _1)); |
| } |
| |
| /* |
| * Our virtual destructor. |
| */ |
| extract_cmc_impl::~extract_cmc_impl() |
| { |
| } |
| } /* namespace gsm */ |
| } /* namespace gr */ |