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/*
Copyright (c) 2012 Martin Lucina <martin@lucina.net>
This file is part of Crossroads I/O.
Crossroads I/O 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.
Crossroads I/O 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 __XS_UDP_RECEIVER_HPP_INCLUDED__
#define __XS_UDP_RECEIVER_HPP_INCLUDED__
#include "platform.hpp"
#include "io_object.hpp"
#include "i_engine.hpp"
#include "options.hpp"
#include "decoder.hpp"
#include "address.hpp"
namespace xs
{
class io_thread_t;
class session_base_t;
class udp_receiver_t : public io_object_t, public i_engine
{
public:
udp_receiver_t (xs::io_thread_t *parent_, const options_t &options_);
~udp_receiver_t ();
int init (const char *address_);
// i_engine interface implementation.
void plug (xs::io_thread_t *io_thread_,
xs::session_base_t *session_);
void unplug ();
void terminate ();
void activate_in ();
void activate_out ();
// i_poll_events interface implementation.
void in_event (fd_t fd_);
void out_event (fd_t fd_);
private:
// We don't support forwarding subscriptions upstream (yet).
void drop_subscriptions ();
// Underlying UDP socket.
fd_t socket;
handle_t socket_handle;
// Socket address.
address_t address;
// Socket options.
options_t options;
// Decoder for this socket.
decoder_t *decoder;
// Amount of unprocessed data waiting in decoder, if any.
ssize_t pending_bytes;
// Pointer to unprocessed data in buffer, if any.
unsigned char *pending_p;
// Buffer for data to process.
unsigned char data [pgm_max_tpdu];
// Associated session.
xs::session_base_t *session;
// UDP header size.
static const size_t udp_header_size = 6;
// Last sequence number seen, 0 if none.
uint32_t last_seq_no;
udp_receiver_t (const udp_receiver_t&);
const udp_receiver_t &operator = (const udp_receiver_t&);
};
}
#endif
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