| /* -*- c++ -*- */ |
| /* @file |
| * @author (C) 2015 by Piotr Krysik <ptrkrysik@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 "tmsi_dumper_impl.h" |
| #include "grgsm/gsmtap.h" |
| #include <iostream> |
| #include <boost/format.hpp> |
| |
| namespace gr { |
| namespace gsm { |
| |
| void tmsi_dumper_impl::dump_tmsi(pmt::pmt_t msg) |
| { |
| time_t t = time(0); |
| tm *now = localtime(&t); |
| |
| 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 * m = (uint8_t *)(message_plus_header+sizeof(gsmtap_hdr)); //message content |
| |
| uint8_t msg_len = m[0]; |
| uint8_t direction_and_protocol = m[1]; |
| uint8_t msg_type = m[2]; |
| |
| if( direction_and_protocol == 0x06 && //direction from originating site, transaction id==0, Radio Resouce Management protocol |
| (msg_type==0x21 || msg_type==0x22 || msg_type==0x24) //types corresponding to paging requests |
| ) |
| { |
| //write timestamp |
| switch(msg_type) { |
| case 0x21: //Paging Request Type 1 |
| { |
| uint8_t mobile_identity_type = m[5] & 0x07; |
| unsigned int next_element_index = 0; //position of the next element |
| bool found_id_element = false; |
| |
| if(mobile_identity_type == 0x04) //identity type: TMSI |
| { |
| write_tmsi(m+6); |
| dump_file << "-"; |
| write_timestamp(now); |
| dump_file << "-0"; |
| dump_file << std::endl; |
| |
| next_element_index = 10; |
| found_id_element = true; |
| } else if(mobile_identity_type == 0x01) //identity type: IMSI |
| { |
| dump_file << "0-"; |
| write_timestamp(now); |
| dump_file << "-"; |
| write_imsi(m+5); |
| dump_file << std::endl; |
| |
| next_element_index = 13; |
| found_id_element = true; |
| } |
| |
| if(found_id_element == true) |
| { |
| //check if there is additional id element |
| uint8_t element_id = m[next_element_index]; |
| if((next_element_index < (msg_len+1)) && (element_id == 0x17)) { |
| //check if there is another element |
| uint8_t element_len = m[next_element_index+1]; |
| mobile_identity_type = m[next_element_index+2] & 0x07; |
| |
| if(mobile_identity_type == 0x04) //identity type: TMSI |
| { |
| write_tmsi(m+next_element_index+3); //write starting from position of the TMSI in the message |
| dump_file << "-"; |
| write_timestamp(now); |
| dump_file << "-0"; |
| dump_file << std::endl; |
| } else if(mobile_identity_type == 0x01) //identity type: IMSI |
| { |
| dump_file << "0-"; |
| write_timestamp(now); |
| dump_file << "-"; |
| write_imsi(m+next_element_index+2); //write starting from position of the IMSI in the message |
| dump_file << std::endl; |
| } |
| } |
| int ii; |
| } |
| } |
| break; |
| case 0x22: //Paging Request Type 2 |
| { |
| uint8_t mobile_identity_type = m[14] & 0x07; |
| |
| write_tmsi(m+4);//1st tmsi location |
| dump_file << "-"; |
| write_timestamp(now); |
| dump_file << "-0"; |
| dump_file << std::endl; |
| |
| write_tmsi(m+8);//2nd tmsi location |
| dump_file << "-"; |
| write_timestamp(now); |
| dump_file << "-0"; |
| dump_file << std::endl; |
| |
| if(mobile_identity_type == 0x04) //identity type: TMSI |
| { |
| write_tmsi(m+15); |
| dump_file << "-"; |
| write_timestamp(now); |
| dump_file << "-0"; |
| dump_file << std::endl; |
| |
| } else if(mobile_identity_type == 0x01) //identity type: IMSI |
| { |
| dump_file << "0-"; |
| write_timestamp(now); |
| dump_file << "-"; |
| write_imsi(m+14); |
| dump_file << std::endl; |
| |
| } |
| } |
| break; |
| case 0x24: //Paging Request Type 3 |
| { |
| int TMSI_INDEX[4] = {4,8,12,16}; // indexes of the 4 tmsi's |
| |
| for(int x =0; x < 4; x++) |
| { |
| write_tmsi(m+TMSI_INDEX[x]); |
| dump_file << "-"; |
| write_timestamp(now); |
| dump_file << "-0"; |
| dump_file << std::endl; |
| } |
| |
| } |
| break; |
| } |
| } |
| } |
| |
| inline void tmsi_dumper_impl::write_timestamp(tm * now) |
| { |
| dump_file << boost::format("%d%02d%02d%02d%02d%02d") |
| % (now->tm_year + 1900-2000) //year -2000 here after the 1900 leaves you with 15 instead of 2015 (delivery reports format is 150112223501) |
| % (now->tm_mon + 1) //month |
| % now->tm_mday //day |
| % now->tm_hour % now->tm_min % now->tm_sec; //time of day |
| return; |
| } |
| |
| inline int swap(uint8_t c) |
| { |
| uint8_t temp1, temp2; |
| temp1 = c & 0x0F; |
| temp2 = c & 0xF0; |
| temp1=temp1 << 4; |
| temp2=temp2 >> 4; |
| return(temp2|temp1); |
| } |
| |
| void tmsi_dumper_impl::write_imsi(uint8_t * imsi) |
| { |
| dump_file << boost::format("%1x%02x%02x%02x%02x%02x%02x%02x") |
| % (swap(imsi[0]) & 0x0f) |
| % swap(imsi[1]) % swap(imsi[2]) % swap(imsi[3]) % swap(imsi[4]) % swap(imsi[5]) % swap(imsi[6]) % swap(imsi[7]); |
| return; |
| } |
| |
| void tmsi_dumper_impl::write_tmsi(uint8_t * tmsi) |
| { |
| dump_file << boost::format("%02x%02x%02x%02x") |
| % (int)tmsi[0] % (int)tmsi[1] % (int)tmsi[2] % (int)tmsi[3]; |
| return; |
| } |
| |
| |
| tmsi_dumper::sptr |
| tmsi_dumper::make() |
| { |
| return gnuradio::get_initial_sptr |
| (new tmsi_dumper_impl()); |
| } |
| |
| /* |
| * The private constructor |
| */ |
| tmsi_dumper_impl::tmsi_dumper_impl() |
| : gr::block("tmsi_dumper", |
| gr::io_signature::make(0, 0, 0), |
| gr::io_signature::make(0, 0, 0)) |
| { |
| dump_file.open("tmsicount.txt", std::ios_base::app); |
| message_port_register_in(pmt::mp("msgs")); |
| set_msg_handler(pmt::mp("msgs"), boost::bind(&tmsi_dumper_impl::dump_tmsi, this, boost::placeholders::_1)); |
| } |
| |
| /* |
| * Our virtual destructor. |
| */ |
| tmsi_dumper_impl::~tmsi_dumper_impl() |
| { |
| dump_file.close(); |
| } |
| } /* namespace gsm */ |
| } /* namespace gr */ |
| |