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/* -*- c++ -*- */
/*
* Copyright 2016 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_DIGITAL_PROTOCOL_FORMATTER_BB_H
#define INCLUDED_DIGITAL_PROTOCOL_FORMATTER_BB_H
#include <gnuradio/digital/api.h>
#include <gnuradio/digital/header_format_base.h>
#include <gnuradio/tagged_stream_block.h>
namespace gr {
namespace digital {
/*!
* \brief Uses a header format object to create a header from a
* tagged stream packet.
*
* \ingroup packet_operators_blk
*
* \details
* This block takes in tagged stream and creates a header,
* generally for MAC-level processing. Each received tagged stream
* is assumed to be its own frame, so any fragmentation would be
* done upstream in or before the flowgraph.
*
* The header that is created and transmitted from this block. The
* payload should then be sent as a parallel tagged stream to be
* muxed together later. The header is based entirely on the \p
* format object, which is an object derived from the
* header_format_base class. All of these packet header format
* objects operate the same: they take in the payload data as well
* as possible extra metadata info about the PDU; the format
* object then returns the output and metadata info. This block
* then transmits the header vector and attaches and metadata as
* tags at the start of the header.
*
* \sa protocol_formatter_async
*/
class DIGITAL_API protocol_formatter_bb : virtual public tagged_stream_block
{
public:
typedef boost::shared_ptr<protocol_formatter_bb> sptr;
/*!
* Make a packet header block using a given \p format.
*
* \param format The format object to use when creating the
* header for the packet. Derived from the
* header_format_base class.
* \param len_tag_key The tagged stream length key.
*/
static sptr make(const header_format_base::sptr &format,
const std::string &len_tag_key="packet_len");
virtual void set_header_format(header_format_base::sptr &format) = 0;
};
} // namespace digital
} // namespace gr
#endif /* INCLUDED_DIGITAL_PROTOCOL_FORMATTER_BB_H */
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