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/*
Copyright (c) 2007-2009 FastMQ Inc.
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU 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
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "platform.hpp"
#if defined ZMQ_HAVE_OPENPGM
#include <iostream>
#include "pgm_receiver.hpp"
#include "err.hpp"
#include "stdint.hpp"
#include "wire.hpp"
#include "i_inout.hpp"
//#define PGM_RECEIVER_DEBUG
//#define PGM_RECEIVER_DEBUG_LEVEL 1
// level 1 = key behaviour
// level 2 = processing flow
// level 4 = infos
#ifndef PGM_RECEIVER_DEBUG
# define zmq_log(n, ...) while (0)
#else
# define zmq_log(n, ...) do { if ((n) <= PGM_RECEIVER_DEBUG_LEVEL) \
{ printf (__VA_ARGS__);}} while (0)
#endif
zmq::pgm_receiver_t::pgm_receiver_t (class io_thread_t *parent_,
const options_t &options_, const char *session_name_) :
io_object_t (parent_),
pgm_socket (true, options_),
options (options_),
session_name (session_name_),
inout (NULL)
{
}
zmq::pgm_receiver_t::~pgm_receiver_t ()
{
// Destructor should not be called before unplug.
zmq_assert (peers.empty ());
}
int zmq::pgm_receiver_t::init (bool udp_encapsulation_, const char *network_)
{
return pgm_socket.init (udp_encapsulation_, network_);
}
void zmq::pgm_receiver_t::plug (i_inout *inout_)
{
// Allocate 2 fds one for socket second for waiting pipe.
int socket_fd;
int waiting_pipe_fd;
// Fill socket_fd and waiting_pipe_fd from PGM transport
pgm_socket.get_receiver_fds (&socket_fd, &waiting_pipe_fd);
// Add socket_fd into poller.
socket_handle = add_fd (socket_fd);
// Add waiting_pipe_fd into poller.
pipe_handle = add_fd (waiting_pipe_fd);
// Set POLLIN for both handlers.
set_pollin (pipe_handle);
set_pollin (socket_handle);
inout = inout_;
}
void zmq::pgm_receiver_t::unplug ()
{
// Delete decoders.
for (peer_t::iterator it = peers.begin (); it != peers.end (); it++) {
if (it->second.decoder != NULL)
delete it->second.decoder;
}
peers.clear ();
rm_fd (socket_handle);
rm_fd (pipe_handle);
inout = NULL;
}
void zmq::pgm_receiver_t::revive ()
{
zmq_assert (false);
}
// POLLIN event from socket or waiting_pipe.
void zmq::pgm_receiver_t::in_event ()
{
// Iterator to peers map.
peer_t::iterator it;
// Data from PGM socket.
unsigned char *raw_data = NULL;
const pgm_tsi_t *tsi = NULL;
ssize_t nbytes = 0;
do {
// Read data from underlying pgm_socket.
nbytes = pgm_socket.receive ((void**) &raw_data, &tsi);
// No ODATA or RDATA.
if (!nbytes)
break;
// Fid TSI in peers list.
it = peers.find (*tsi);
// Data loss.
if (nbytes == -1) {
zmq_assert (it != peers.end ());
// Delete decoder and set joined to false.
it->second.joined = false;
if (it->second.decoder != NULL) {
delete it->second.decoder;
it->second.decoder = NULL;
}
break;
}
// Read offset of the fist message in current APDU.
zmq_assert ((size_t) nbytes >= sizeof (uint16_t));
uint16_t apdu_offset = get_uint16 (raw_data);
// Shift raw_data & decrease nbytes by the first message offset
// information (sizeof uint16_t).
raw_data += sizeof (uint16_t);
nbytes -= sizeof (uint16_t);
zmq_assert (apdu_offset <= nbytes);
// New peer.
if (it == peers.end ()) {
peer_info_t peer_info = {false, NULL};
it = peers.insert (std::make_pair (*tsi, peer_info)).first;
zmq_log (1, "New peer TSI: %s, %s(%i).\n", pgm_print_tsi (tsi),
__FILE__, __LINE__);
}
// There is not beginning of the message in current APDU and we
// are not joined jet -> throwing data.
if (apdu_offset == 0xFFFF && !it->second.joined) {
break;
}
// Now is the possibility to join the stream.
if (!it->second.joined) {
zmq_assert (it->second.decoder == NULL);
// We have to move data to the begining of the first message.
raw_data += apdu_offset;
nbytes -= apdu_offset;
// Joined the stream.
it->second.joined = true;
// Create and connect decoder for joined peer.
it->second.decoder = new zmq_decoder_t;
it->second.decoder->set_inout (inout);
zmq_log (1, "Peer %s joined into the stream, %s(%i)\n",
pgm_print_tsi (tsi), __FILE__, __LINE__);
}
if (nbytes > 0) {
// Push all the data to the decoder.
it->second.decoder->write (raw_data, nbytes);
}
} while (nbytes > 0);
// Flush any messages decoder may have produced to the dispatcher.
inout->flush ();
}
void zmq::pgm_receiver_t::out_event ()
{
zmq_assert (false);
}
#endif
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