77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
/* -*- c++ -*- */
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/* @file
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* @author (C) 2016 by Piotr Krysik <ptrkrysik@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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*/
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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 "uplink_downlink_splitter_impl.h"
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#include <grgsm/gsmtap.h>
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#include <grgsm/endian.h>
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#define BURST_SIZE 148
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namespace gr {
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namespace gsm {
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uplink_downlink_splitter::sptr
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uplink_downlink_splitter::make()
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{
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return gnuradio::get_initial_sptr
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(new uplink_downlink_splitter_impl());
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}
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/*
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* The private constructor
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*/
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uplink_downlink_splitter_impl::uplink_downlink_splitter_impl()
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: gr::block("uplink_downlink_splitter",
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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("in"));
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message_port_register_out(pmt::mp("uplink"));
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message_port_register_out(pmt::mp("downlink"));
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set_msg_handler(pmt::mp("in"), boost::bind(&uplink_downlink_splitter_impl::process_msg, this, boost::placeholders::_1));
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}
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void uplink_downlink_splitter_impl::process_msg(pmt::pmt_t msg)
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{
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gsmtap_hdr * header = (gsmtap_hdr *)(pmt::blob_data(pmt::cdr(msg)));
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bool uplink_burst = (be16toh(header->arfcn) & 0x4000) ? true : false;
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if(uplink_burst)
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{
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message_port_pub(pmt::mp("uplink"), msg);
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} else {
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message_port_pub(pmt::mp("downlink"), msg);
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}
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}
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/*
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* Our virtual destructor.
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*/
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uplink_downlink_splitter_impl::~uplink_downlink_splitter_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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