/* Copyright 2016, 2019, 2023 National Research Foundation (SARAO)
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 *
 * This program 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 Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @file
 */

#include <cstddef>
#include <cstdint>
#include <spead2/recv_packet.h>
#include <spead2/recv_stream.h>
#include <spead2/recv_udp_base.h>
#include <spead2/common_logging.h>

namespace spead2::recv
{

bool udp_reader_base::process_one_packet(
    stream_base::add_packet_state &state,
    const std::uint8_t *data, std::size_t length, std::size_t max_size)
{
    bool stopped = false;
    if (length <= max_size && length > 0)
    {
        // If it's bigger, the packet might have been truncated
        packet_header packet;
        std::size_t size = decode_packet(packet, data, length);
        if (size == length)
        {
            state.add_packet(packet);
            if (state.is_stopped())
            {
                log_debug("UDP reader: end of stream detected");
                stopped = true;
            }
        }
        else if (size != 0)
        {
            log_info("discarding packet due to size mismatch (%1% != %2%)",
                     size, length);
        }
    }
    else if (length > max_size)
        log_info("dropped packet due to truncation");
    return stopped;
}

} // namespace spead2::recv