134 lines
3.4 KiB
C++
134 lines
3.4 KiB
C++
/* -*- c++ -*- */
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/* @file
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* @author (C) 2015 by Roman Khassraf <rkhassraf@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 "burst_fnr_filter_impl.h"
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#include <stdio.h>
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#include <grgsm/endian.h>
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#include <grgsm/gsmtap.h>
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namespace gr {
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namespace gsm {
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burst_fnr_filter::sptr
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burst_fnr_filter::make(filter_mode mode, unsigned int fnr)
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{
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return gnuradio::get_initial_sptr
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(new burst_fnr_filter_impl(mode, fnr));
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}
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/*
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* The private constructor
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*/
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burst_fnr_filter_impl::burst_fnr_filter_impl(filter_mode mode, unsigned int fnr)
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: gr::block("burst_fnr_filter",
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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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d_mode(mode),
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d_framenr(fnr),
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d_filter_policy(FILTER_POLICY_DEFAULT)
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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("out"));
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set_msg_handler(pmt::mp("in"), boost::bind(&burst_fnr_filter_impl::process_burst, this, boost::placeholders::_1));
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}
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/*
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* Our virtual destructor.
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*/
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burst_fnr_filter_impl::~burst_fnr_filter_impl() {}
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void burst_fnr_filter_impl::process_burst(pmt::pmt_t msg)
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{
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if (d_filter_policy == FILTER_POLICY_DROP_ALL)
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return;
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if (d_filter_policy == FILTER_POLICY_PASS_ALL) {
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message_port_pub(pmt::mp("out"), msg);
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return;
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}
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pmt::pmt_t header_plus_burst = pmt::cdr(msg);
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gsmtap_hdr * header = (gsmtap_hdr *)pmt::blob_data(header_plus_burst);
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unsigned int frame_nr = be32toh(header->frame_number);
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if ((d_mode == FILTER_LESS_OR_EQUAL && frame_nr <= d_framenr)
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|| (d_mode == FILTER_GREATER_OR_EQUAL && frame_nr >= d_framenr))
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{
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message_port_pub(pmt::mp("out"), msg);
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}
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}
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/* External API */
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unsigned int
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burst_fnr_filter_impl::get_fn(void)
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{
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return d_framenr;
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}
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unsigned int
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burst_fnr_filter_impl::set_fn(unsigned int fn)
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{
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if (fn <= GSM_HYPERFRAME)
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d_framenr = fn;
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return d_framenr;
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}
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filter_mode
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burst_fnr_filter_impl::get_mode(void)
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{
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return d_mode;
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}
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filter_mode
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burst_fnr_filter_impl::set_mode(filter_mode mode)
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{
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d_mode = mode;
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return d_mode;
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}
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/* Filtering policy */
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filter_policy
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burst_fnr_filter_impl::get_policy(void)
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{
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return d_filter_policy;
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}
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filter_policy
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burst_fnr_filter_impl::set_policy(filter_policy policy)
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{
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d_filter_policy = policy;
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return d_filter_policy;
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}
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} /* namespace gsm */
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} /* namespace gr */
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