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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 <new>
#include "zmq_listener_init.hpp"
#include "io_thread.hpp"
#include "session.hpp"
#include "err.hpp"
zmq::zmq_listener_init_t::zmq_listener_init_t (io_thread_t *parent_,
socket_base_t *owner_, fd_t fd_, const options_t &options_) :
owned_t (parent_, owner_),
options (options_),
has_peer_identity (false)
{
// Create associated engine object.
engine = new (std::nothrow) zmq_engine_t (parent_, fd_, options,
false, NULL);
zmq_assert (engine);
}
zmq::zmq_listener_init_t::~zmq_listener_init_t ()
{
if (engine)
delete engine;
}
bool zmq::zmq_listener_init_t::read (::zmq_msg_t *msg_)
{
return false;
}
bool zmq::zmq_listener_init_t::write (::zmq_msg_t *msg_)
{
// Once we've got peer's identity we aren't interested in subsequent
// messages.
if (has_peer_identity)
return false;
// Retreieve the remote identity. We'll use it as a local session name.
has_peer_identity = true;
peer_identity.assign ((const char*) zmq_msg_data (msg_),
zmq_msg_size (msg_));
return true;
}
void zmq::zmq_listener_init_t::flush ()
{
if (!has_peer_identity)
return;
// Initialisation is done. Disconnect the engine from the init object.
engine->unplug ();
// Have a look whether the session already exists. If it does, attach it
// to the engine. If it doesn't create it first.
session_t *session = NULL;
if (!peer_identity.empty ())
session = owner->find_session (peer_identity.c_str ());
if (!session) {
io_thread_t *io_thread = choose_io_thread (options.affinity);
session = new (std::nothrow) session_t (io_thread, owner,
peer_identity.c_str (), options, false);
zmq_assert (session);
send_plug (session);
send_own (owner, session);
// Reserve a sequence number for following 'attach' command.
session->inc_seqnum ();
}
// No need to increment seqnum as it was laready incremented above.
send_attach (session, engine, false);
engine = NULL;
// Destroy the init object.
term ();
}
void zmq::zmq_listener_init_t::detach (owned_t *reconnecter_)
{
// On the listening side of the connection we are never reconnecting.
zmq_assert (reconnecter_ == NULL);
// This function is called by engine when disconnection occurs.
// The engine will destroy itself, so we just drop the pointer here and
// start termination of the init object.
engine = NULL;
term ();
}
zmq::io_thread_t *zmq::zmq_listener_init_t::get_io_thread ()
{
return choose_io_thread (options.affinity);
}
class zmq::socket_base_t *zmq::zmq_listener_init_t::get_owner ()
{
return owner;
}
const char *zmq::zmq_listener_init_t::get_session_name ()
{
zmq_assert (false);
return NULL;
}
void zmq::zmq_listener_init_t::process_plug ()
{
zmq_assert (engine);
engine->plug (this);
}
void zmq::zmq_listener_init_t::process_unplug ()
{
if (engine)
engine->unplug ();
}
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