Roman Khassraf | d7e3eec | 2015-08-06 11:54:22 +0200 | [diff] [blame] | 1 | /* -*- c++ -*- */ |
| 2 | /* @file |
Piotr Krysik | a6268a5 | 2017-08-23 16:02:19 +0200 | [diff] [blame] | 3 | * @author (C) 2015 by Roman Khassraf <rkhassraf@gmail.com> |
Roman Khassraf | d7e3eec | 2015-08-06 11:54:22 +0200 | [diff] [blame] | 4 | * @section LICENSE |
| 5 | * |
| 6 | * Gr-gsm is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 3, or (at your option) |
| 9 | * any later version. |
| 10 | * |
| 11 | * Gr-gsm is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with gr-gsm; see the file COPYING. If not, write to |
| 18 | * the Free Software Foundation, Inc., 51 Franklin Street, |
| 19 | * Boston, MA 02110-1301, USA. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #ifdef HAVE_CONFIG_H |
| 24 | #include "config.h" |
| 25 | #endif |
| 26 | |
| 27 | #include <gnuradio/io_signature.h> |
| 28 | #include "burst_timeslot_filter_impl.h" |
| 29 | #include <stdio.h> |
| 30 | #include <grgsm/endian.h> |
| 31 | #include <grgsm/gsmtap.h> |
| 32 | |
| 33 | |
| 34 | namespace gr { |
| 35 | namespace gsm { |
| 36 | |
| 37 | burst_timeslot_filter::sptr |
| 38 | burst_timeslot_filter::make(unsigned int timeslot) |
| 39 | { |
| 40 | return gnuradio::get_initial_sptr |
| 41 | (new burst_timeslot_filter_impl(timeslot)); |
| 42 | } |
| 43 | |
| 44 | /* |
| 45 | * The private constructor |
| 46 | */ |
| 47 | burst_timeslot_filter_impl::burst_timeslot_filter_impl(unsigned int timeslot) |
| 48 | : gr::block("burst_timeslot_filter", |
| 49 | gr::io_signature::make(0, 0, 0), |
| 50 | gr::io_signature::make(0, 0, 0)), |
Vadim Yanitskiy | 04536ab | 2017-07-21 10:59:51 +0700 | [diff] [blame] | 51 | d_timeslot(timeslot), |
| 52 | d_filter_policy(FILTER_POLICY_DEFAULT) |
Roman Khassraf | d7e3eec | 2015-08-06 11:54:22 +0200 | [diff] [blame] | 53 | { |
| 54 | message_port_register_in(pmt::mp("in")); |
| 55 | message_port_register_out(pmt::mp("out")); |
| 56 | |
| 57 | set_msg_handler(pmt::mp("in"), boost::bind(&burst_timeslot_filter_impl::process_burst, this, _1)); |
| 58 | } |
| 59 | |
| 60 | /* |
| 61 | * Our virtual destructor. |
| 62 | */ |
| 63 | burst_timeslot_filter_impl::~burst_timeslot_filter_impl() {} |
| 64 | |
| 65 | void burst_timeslot_filter_impl::process_burst(pmt::pmt_t msg) |
| 66 | { |
Vadim Yanitskiy | 04536ab | 2017-07-21 10:59:51 +0700 | [diff] [blame] | 67 | if (d_filter_policy == FILTER_POLICY_DROP_ALL) |
| 68 | return; |
| 69 | |
| 70 | if (d_filter_policy == FILTER_POLICY_PASS_ALL) { |
| 71 | message_port_pub(pmt::mp("out"), msg); |
| 72 | return; |
| 73 | } |
| 74 | |
Roman Khassraf | d7e3eec | 2015-08-06 11:54:22 +0200 | [diff] [blame] | 75 | pmt::pmt_t header_plus_burst = pmt::cdr(msg); |
| 76 | gsmtap_hdr * header = (gsmtap_hdr *)pmt::blob_data(header_plus_burst); |
| 77 | |
| 78 | unsigned int timeslot = header->timeslot; |
| 79 | |
| 80 | if (header->timeslot == d_timeslot) |
| 81 | { |
| 82 | message_port_pub(pmt::mp("out"), msg); |
| 83 | } |
| 84 | } |
Vadim Yanitskiy | 91195eb | 2017-07-21 06:39:40 +0700 | [diff] [blame] | 85 | |
| 86 | /* |
| 87 | * External API |
| 88 | */ |
| 89 | unsigned int |
| 90 | burst_timeslot_filter_impl::get_tn(void) |
| 91 | { |
| 92 | return d_timeslot; |
| 93 | } |
| 94 | |
| 95 | unsigned int |
| 96 | burst_timeslot_filter_impl::set_tn(unsigned int tn) |
| 97 | { |
| 98 | if (tn < 8) |
| 99 | d_timeslot = tn; |
| 100 | |
| 101 | return d_timeslot; |
| 102 | } |
| 103 | |
Vadim Yanitskiy | 04536ab | 2017-07-21 10:59:51 +0700 | [diff] [blame] | 104 | /* Filtering policy */ |
| 105 | filter_policy |
| 106 | burst_timeslot_filter_impl::get_policy(void) |
| 107 | { |
| 108 | return d_filter_policy; |
| 109 | } |
| 110 | |
| 111 | filter_policy |
| 112 | burst_timeslot_filter_impl::set_policy(filter_policy policy) |
| 113 | { |
| 114 | d_filter_policy = policy; |
| 115 | return d_filter_policy; |
| 116 | } |
| 117 | |
Roman Khassraf | d7e3eec | 2015-08-06 11:54:22 +0200 | [diff] [blame] | 118 | } /* namespace gsm */ |
| 119 | } /* namespace gr */ |