94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
/* -*- c++ -*- */
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/*
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* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
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*
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* Copyright (C) 2016, Libre Space Foundation <http://librespacefoundation.org/>
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*
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* This program 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 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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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 "qb50_deframer_impl.h"
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#include <satnogs/ax25.h>
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namespace gr {
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namespace satnogs {
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qb50_deframer::sptr
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qb50_deframer::make(uint8_t wod_ssid)
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{
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return gnuradio::get_initial_sptr(new qb50_deframer_impl(wod_ssid));
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}
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void
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qb50_deframer_impl::msg_handler(pmt::pmt_t msg)
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{
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const uint8_t *frame;
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uint8_t dest_ssid;
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size_t frame_len;
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frame = (const uint8_t *) pmt::blob_data(msg);
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frame_len = pmt::blob_length(msg);
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if (frame_len < AX25_MIN_ADDR_LEN) {
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LOG_ERROR("Invalid AX.25 frame size");
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return;
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}
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/*
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* Get the destination SSID and decide in which port the frame should
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* be forwarded. Also skip the leading headers and leave only the payload
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*/
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dest_ssid = ax25_get_dest_ssid(frame);
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if (dest_ssid == d_wod_ssid) {
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message_port_pub(
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pmt::mp("wod"),
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pmt::make_blob(frame + AX25_MIN_ADDR_LEN + 2,
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frame_len - AX25_MIN_ADDR_LEN - 2));
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}
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else {
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message_port_pub(
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pmt::mp("out"),
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pmt::make_blob(frame + AX25_MIN_ADDR_LEN + 2,
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frame_len - AX25_MIN_ADDR_LEN - 2));
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}
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}
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/*
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* The private constructor
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*/
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qb50_deframer_impl::qb50_deframer_impl(uint8_t wod_ssid)
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: gr::block("qb50_deframer",
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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_wod_ssid(wod_ssid)
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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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message_port_register_out(pmt::mp("wod"));
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set_msg_handler(
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pmt::mp("in"),
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boost::bind(&qb50_deframer_impl::msg_handler, this, _1));
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}
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} /* namespace satnogs */
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} /* namespace gr */
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