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/* -*- c++ -*- */
/*
* @file
* @author 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 <grgsm/gsmtap.h>
#include <unistd.h>
#include <map>
#include <iterator>
#include <algorithm>
#include <iostream>
#include <endian.h>
#include <boost/foreach.hpp>
extern "C" {
#include <osmocom/gsm/gsm48_ie.h>
}
#include "extract_system_info_impl.h"
namespace gr {
namespace gsm {
boost::mutex extract_mutex;
void extract_system_info_impl::process_bursts(pmt::pmt_t msg)
{
pmt::pmt_t burst_plus_header_blob = pmt::cdr(msg);
gsmtap_hdr * header = (gsmtap_hdr *)pmt::blob_data(burst_plus_header_blob);
chan_info info;
info.id = be16toh(header->arfcn);
info.pwr_db = header->signal_dbm;
boost::mutex::scoped_lock lock(extract_mutex);
if(d_c0_channels.find(info.id) != d_c0_channels.end()){
d_c0_channels[info.id].copy_nonzero_elements(info);
} else {
d_c0_channels[info.id] = info;
}
}
void extract_system_info_impl::process_sysinfo(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));
struct gsm_sysinfo_freq freq[1024];
if(msg_elements[2]==0x1b){
chan_info info;
info.id = be16toh(header->arfcn); //take arfcn
info.pwr_db = header->signal_dbm;
info.cell_id = (msg_elements[3]<<8)+msg_elements[4]; //take cell id
info.lac = (msg_elements[8]<<8)+msg_elements[9]; //take lac
info.mnc = (msg_elements[7]>>4); //take mnc
boost::mutex::scoped_lock lock(extract_mutex);
if(d_c0_channels.find(info.id) != d_c0_channels.end()){
d_c0_channels[info.id].copy_nonzero_elements(info);
} else {
d_c0_channels[info.id] = info;
}
}
else if(msg_elements[2]==0x1c){
chan_info info;
info.id = be16toh(header->arfcn); //take arfcn
info.pwr_db = header->signal_dbm;
info.lac = (msg_elements[6]<<8)+msg_elements[7]; //take lac
info.mnc = (msg_elements[5]>>4); //take mnc
boost::mutex::scoped_lock lock(extract_mutex);
if(d_c0_channels.find(info.id) != d_c0_channels.end()){
d_c0_channels[info.id].copy_nonzero_elements(info);
} else {
d_c0_channels[info.id] = info;
}
}
else if(msg_elements[2]==0x1a){ //System Information Type 2
memset(freq, 0, sizeof(freq));
chan_info info;
info.id = be16toh(header->arfcn); //take arfcn
info.pwr_db = header->signal_dbm;
boost::mutex::scoped_lock lock(extract_mutex);
//read neighbour cells
gsm48_decode_freq_list(freq, &msg_elements[3], 16, 0xce, 0x01);
for(int arfcn=0; arfcn<sizeof(freq); arfcn++){
if(freq[arfcn].mask==0x01){
d_c0_channels[info.id].neighbour_cells.insert(arfcn);
}
}
if(d_c0_channels.find(info.id) != d_c0_channels.end()){
d_c0_channels[info.id].copy_nonzero_elements(info);
} else {
d_c0_channels[info.id] = info;
}
}
else if(msg_elements[2]==0x02){ //System Information Type 2bis
memset(freq, 0, sizeof(freq));
chan_info info;
info.id = be16toh(header->arfcn); //take arfcn
info.pwr_db = header->signal_dbm;
boost::mutex::scoped_lock lock(extract_mutex);
//read neighbour cells
gsm48_decode_freq_list(freq, &msg_elements[3], 16, 0xce, 0x01);
for(int arfcn=0; arfcn<sizeof(freq); arfcn++){
if(freq[arfcn].mask==0x01){
d_c0_channels[info.id].neighbour_cells.insert(arfcn);
}
}
if(d_c0_channels.find(info.id) != d_c0_channels.end()){
d_c0_channels[info.id].copy_nonzero_elements(info);
} else {
d_c0_channels[info.id] = info;
}
}
else if(msg_elements[2]==0x03){ //System Information Type 2ter
memset(freq, 0, sizeof(freq));
chan_info info;
info.id = be16toh(header->arfcn); //take arfcn
info.pwr_db = header->signal_dbm;
boost::mutex::scoped_lock lock(extract_mutex);
//read neighbour cells
gsm48_decode_freq_list(freq, &msg_elements[3], 16, 0x8e, 0x01);
for(int arfcn=0; arfcn<sizeof(freq); arfcn++){
if(freq[arfcn].mask==0x01){
d_c0_channels[info.id].neighbour_cells.insert(arfcn);
}
}
if(d_c0_channels.find(info.id) != d_c0_channels.end()){
d_c0_channels[info.id].copy_nonzero_elements(info);
} else {
d_c0_channels[info.id] = info;
}
}
}
std::vector<int> extract_system_info_impl::get_chans()
{
std::vector<int> chans_ids;
BOOST_FOREACH(chan_info_map::value_type &i, d_c0_channels){
chans_ids.push_back(i.second.id);
}
return chans_ids;
}
std::vector<int> extract_system_info_impl::get_lac()
{
std::vector<int> lacs;
BOOST_FOREACH(chan_info_map::value_type &i, d_c0_channels){
lacs.push_back(i.second.lac);
}
return lacs;
}
std::vector<int> extract_system_info_impl::get_mnc()
{
std::vector<int> mncs;
BOOST_FOREACH(chan_info_map::value_type &i, d_c0_channels){
mncs.push_back(i.second.mnc);
}
return mncs;
}
std::vector<int> extract_system_info_impl::get_cell_id()
{
std::vector<int> cell_ids;
BOOST_FOREACH(chan_info_map::value_type &i, d_c0_channels){
cell_ids.push_back(i.second.cell_id);
}
return cell_ids;
}
std::vector<int> extract_system_info_impl::get_pwrs()
{
std::vector<int> pwrs;
BOOST_FOREACH(chan_info_map::value_type &i, d_c0_channels){
pwrs.push_back(i.second.pwr_db);
}
return pwrs;
}
std::vector<int> extract_system_info_impl::get_neighbours(int chan_id)
{
std::vector<int> neighbour_cells;
BOOST_FOREACH(int n, d_c0_channels[chan_id].neighbour_cells){
neighbour_cells.push_back(n);
}
return neighbour_cells;
}
void extract_system_info_impl::reset()
{
d_c0_channels.clear();
if(!empty_p(pmt::mp("bursts"))){
delete_head_blocking(pmt::mp("bursts"));
}
if(!empty_p(pmt::mp("msgs"))){
delete_head_blocking(pmt::mp("msgs"));
}
}
extract_system_info::sptr
extract_system_info::make()
{
return gnuradio::get_initial_sptr
(new extract_system_info_impl());
}
/*
* The private constructor
*/
extract_system_info_impl::extract_system_info_impl()
: gr::block("extract_system_info",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(0, 0, 0)),
after_reset(false)
{
message_port_register_in(pmt::mp("bursts"));
set_msg_handler(pmt::mp("bursts"), boost::bind(&extract_system_info_impl::process_bursts, this, _1));
message_port_register_in(pmt::mp("msgs"));
set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_system_info_impl::process_sysinfo, this, _1));
}
/*
* Our virtual destructor.
*/
extract_system_info_impl::~extract_system_info_impl()
{
}
} /* namespace gsm */
} /* namespace gr */
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