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/* -*- c++ -*- */
/* @file
* @author (C) 2015 by 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 "burst_timeslot_filter_impl.h"
#include <stdio.h>
#include <grgsm/endian.h>
#include <grgsm/gsmtap.h>
namespace gr {
namespace gsm {
burst_timeslot_filter::sptr
burst_timeslot_filter::make(unsigned int timeslot)
{
return gnuradio::get_initial_sptr
(new burst_timeslot_filter_impl(timeslot));
}
/*
* The private constructor
*/
burst_timeslot_filter_impl::burst_timeslot_filter_impl(unsigned int timeslot)
: gr::block("burst_timeslot_filter",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(0, 0, 0)),
d_timeslot(timeslot),
d_filter_policy(FILTER_POLICY_DEFAULT)
{
message_port_register_in(pmt::mp("in"));
message_port_register_out(pmt::mp("out"));
set_msg_handler(pmt::mp("in"), boost::bind(&burst_timeslot_filter_impl::process_burst, this, _1));
}
/*
* Our virtual destructor.
*/
burst_timeslot_filter_impl::~burst_timeslot_filter_impl() {}
void burst_timeslot_filter_impl::process_burst(pmt::pmt_t msg)
{
if (d_filter_policy == FILTER_POLICY_DROP_ALL)
return;
if (d_filter_policy == FILTER_POLICY_PASS_ALL) {
message_port_pub(pmt::mp("out"), msg);
return;
}
pmt::pmt_t header_plus_burst = pmt::cdr(msg);
gsmtap_hdr * header = (gsmtap_hdr *)pmt::blob_data(header_plus_burst);
unsigned int timeslot = header->timeslot;
if (header->timeslot == d_timeslot)
{
message_port_pub(pmt::mp("out"), msg);
}
}
/*
* External API
*/
unsigned int
burst_timeslot_filter_impl::get_tn(void)
{
return d_timeslot;
}
unsigned int
burst_timeslot_filter_impl::set_tn(unsigned int tn)
{
if (tn < 8)
d_timeslot = tn;
return d_timeslot;
}
/* Filtering policy */
filter_policy
burst_timeslot_filter_impl::get_policy(void)
{
return d_filter_policy;
}
filter_policy
burst_timeslot_filter_impl::set_policy(filter_policy policy)
{
d_filter_policy = policy;
return d_filter_policy;
}
} /* namespace gsm */
} /* namespace gr */
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