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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 "uplink_downlink_splitter_impl.h"
#include <grgsm/gsmtap.h>
#include <grgsm/endian.h>
#define BURST_SIZE 148
namespace gr {
namespace grgsm {
uplink_downlink_splitter::sptr
uplink_downlink_splitter::make()
{
return gnuradio::get_initial_sptr
(new uplink_downlink_splitter_impl());
}
/*
* The private constructor
*/
uplink_downlink_splitter_impl::uplink_downlink_splitter_impl()
: gr::block("uplink_downlink_splitter",
gr::io_signature::make(0,0,0),
gr::io_signature::make(0,0,0))
{
message_port_register_in(pmt::mp("in"));
message_port_register_out(pmt::mp("uplink"));
message_port_register_out(pmt::mp("downlink"));
set_msg_handler(pmt::mp("in"), boost::bind(&uplink_downlink_splitter_impl::process_msg, this, _1));
}
void uplink_downlink_splitter_impl::process_msg(pmt::pmt_t msg)
{
gsmtap_hdr * header = (gsmtap_hdr *)(pmt::blob_data(pmt::cdr(msg)));
bool uplink_burst = (be16toh(header->arfcn) & 0x4000) ? true : false;
if(uplink_burst)
{
message_port_pub(pmt::mp("uplink"), msg);
} else {
message_port_pub(pmt::mp("downlink"), msg);
}
}
/*
* Our virtual destructor.
*/
uplink_downlink_splitter_impl::~uplink_downlink_splitter_impl()
{
}
} /* namespace grgsm */
} /* namespace gr */
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