text: /* -*- c++ -*- */
  /*
   * Copyright 2007-2010,2013,2015 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_GR_UDP_SOURCE_H
  #define INCLUDED_GR_UDP_SOURCE_H
  
  #include <gnuradio/blocks/api.h>
  #include <gnuradio/sync_block.h>
  
  namespace gr {
    namespace blocks {
  
      /*!
       * \brief Read stream from an UDP socket.
       * \ingroup networking_tools_blk
       */
      class BLOCKS_API udp_source : virtual public sync_block
      {
      public:
        // gr::blocks::udp_source::sptr
        typedef boost::shared_ptr<udp_source> sptr;
  
        /*!
         * \brief UDP Source Constructor
         *
         * \param itemsize     The size (in bytes) of the item datatype
         * \param host         The name or IP address of the transmitting host; can be
         *                     NULL, None, or "0.0.0.0" to allow reading from any
         *                     interface on the host
         * \param port         The port number on which to receive data; use 0 to
         *                     have the system assign an unused port number
         * \param payload_size UDP payload size by default set to 1472 =
         *                     (1500 MTU - (8 byte UDP header) - (20 byte IP header))
         * \param eof          Interpret zero-length packet as EOF (default: true)
         */
        static sptr make(size_t itemsize,
                         const std::string &host, int port,
                         int payload_size=1472,
                         bool eof=true);
  
        /*! \brief Change the connection to a new destination
         *
         * \param host         The name or IP address of the receiving host; use
         *                     NULL or None to break the connection without closing
         * \param port         Destination port to connect to on receiving host
         *
         * Calls disconnect() to terminate any current connection first.
         */
        virtual void connect(const std::string &host, int port) = 0;
  
        /*! \brief Cut the connection if we have one set up.
         */
        virtual void disconnect() = 0;
  
        /*! \brief return the PAYLOAD_SIZE of the socket */
        virtual int payload_size() = 0;
  
        /*! \brief return the port number of the socket */
        virtual int get_port() = 0;
      };
  
    } /* namespace blocks */
  } /* namespace gr */
  
  #endif /* INCLUDED_GR_UDP_SOURCE_H */
  