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/*
Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
This file is part of 0MQ.
0MQ 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.
0MQ 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/>.
*/
#ifndef __ZMQ_PGM_RECEIVER_HPP_INCLUDED__
#define __ZMQ_PGM_RECEIVER_HPP_INCLUDED__
#include "platform.hpp"
#if defined ZMQ_HAVE_OPENPGM
#ifdef ZMQ_HAVE_WINDOWS
#include "windows.hpp"
#endif
#include <map>
#include <algorithm>
#include "io_object.hpp"
#include "i_engine.hpp"
#include "options.hpp"
#include "v1_decoder.hpp"
#include "pgm_socket.hpp"
namespace zmq
{
class io_thread_t;
class session_base_t;
class pgm_receiver_t : public io_object_t, public i_engine
{
public:
pgm_receiver_t (zmq::io_thread_t *parent_, const options_t &options_);
~pgm_receiver_t ();
int init (bool udp_encapsulation_, const char *network_);
// i_engine interface implementation.
void plug (zmq::io_thread_t *io_thread_,
zmq::session_base_t *session_);
void terminate ();
void restart_input ();
void restart_output ();
void zap_msg_available () {}
// i_poll_events interface implementation.
void in_event ();
void timer_event (int token);
private:
// Unplug the engine from the session.
void unplug ();
// Decode received data (inpos, insize) and forward decoded
// messages to the session.
int process_input (v1_decoder_t *decoder);
// PGM is not able to move subscriptions upstream. Thus, drop all
// the pending subscriptions.
void drop_subscriptions ();
// RX timeout timer ID.
enum {rx_timer_id = 0xa1};
// RX timer is running.
bool has_rx_timer;
// If joined is true we are already getting messages from the peer.
// It it's false, we are getting data but still we haven't seen
// beginning of a message.
struct peer_info_t
{
bool joined;
v1_decoder_t *decoder;
};
struct tsi_comp
{
bool operator () (const pgm_tsi_t <si,
const pgm_tsi_t &rtsi) const
{
uint32_t ll[2], rl[2];
memcpy (ll, <si, sizeof (ll));
memcpy (rl, &rtsi, sizeof (rl));
return (ll[0] < rl[0]) || (ll[0] == rl[0] && ll[1] < rl[1]);
}
};
typedef std::map <pgm_tsi_t, peer_info_t, tsi_comp> peers_t;
peers_t peers;
// PGM socket.
pgm_socket_t pgm_socket;
// Socket options.
options_t options;
// Associated session.
zmq::session_base_t *session;
const pgm_tsi_t *active_tsi;
// Number of bytes not consumed by the decoder due to pipe overflow.
size_t insize;
// Pointer to data still waiting to be processed by the decoder.
const unsigned char *inpos;
// Poll handle associated with PGM socket.
handle_t socket_handle;
// Poll handle associated with engine PGM waiting pipe.
handle_t pipe_handle;
pgm_receiver_t (const pgm_receiver_t&);
const pgm_receiver_t &operator = (const pgm_receiver_t&);
};
}
#endif
#endif
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