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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "qpid/sys/ProtocolFactory.h"
#include "qpid/sys/AsynchIOHandler.h"
#include "qpid/sys/AsynchIO.h"
#include "qpid/Plugin.h"
#include "qpid/sys/Socket.h"
#include "qpid/sys/SocketAddress.h"
#include "qpid/sys/Poller.h"
#include "qpid/broker/Broker.h"
#include "qpid/log/Statement.h"
#include <boost/bind.hpp>
#include <boost/ptr_container/ptr_vector.hpp>
namespace qpid {
namespace sys {
class Timer;
class AsynchIOProtocolFactory : public ProtocolFactory {
boost::ptr_vector<Socket> listeners;
boost::ptr_vector<AsynchAcceptor> acceptors;
Timer& brokerTimer;
uint32_t maxNegotiateTime;
uint16_t listeningPort;
const bool tcpNoDelay;
public:
AsynchIOProtocolFactory(const std::string& host, const std::string& port,
int backlog, bool nodelay,
Timer& timer, uint32_t maxTime,
bool shouldListen);
void accept(Poller::shared_ptr, ConnectionCodec::Factory*);
void connect(Poller::shared_ptr, const std::string& host, const std::string& port,
ConnectionCodec::Factory*,
ConnectFailedCallback);
uint16_t getPort() const;
private:
void established(Poller::shared_ptr, const Socket&, ConnectionCodec::Factory*,
bool isClient);
void connectFailed(const Socket&, int, const std::string&, ConnectFailedCallback);
};
static bool sslMultiplexEnabled(void)
{
Options o;
Plugin::addOptions(o);
if (o.find_nothrow("ssl-multiplex", false)) {
// This option is added by the SSL plugin when the SSL port
// is configured to be the same as the main port.
QPID_LOG(notice, "SSL multiplexing enabled");
return true;
}
return false;
}
// Static instance to initialise plugin
static class TCPIOPlugin : public Plugin {
void earlyInitialize(Target&) {
}
void initialize(Target& target) {
broker::Broker* broker = dynamic_cast<broker::Broker*>(&target);
// Only provide to a Broker
if (broker) {
const broker::Broker::Options& opts = broker->getOptions();
// Check for SSL on the same port
bool shouldListen = !sslMultiplexEnabled();
ProtocolFactory::shared_ptr protocolt(
new AsynchIOProtocolFactory(
"", boost::lexical_cast<std::string>(opts.port),
opts.connectionBacklog,
opts.tcpNoDelay,
broker->getTimer(), opts.maxNegotiateTime,
shouldListen));
if (shouldListen) {
QPID_LOG(notice, "Listening on TCP/TCP6 port " << protocolt->getPort());
}
broker->registerProtocolFactory("tcp", protocolt);
}
}
} tcpPlugin;
AsynchIOProtocolFactory::AsynchIOProtocolFactory(const std::string& host, const std::string& port,
int backlog, bool nodelay,
Timer& timer, uint32_t maxTime,
bool shouldListen) :
brokerTimer(timer),
maxNegotiateTime(maxTime),
tcpNoDelay(nodelay)
{
if (!shouldListen) {
listeningPort = boost::lexical_cast<uint16_t>(port);
return;
}
SocketAddress sa(host, port);
// We must have at least one resolved address
QPID_LOG(info, "Listening to: " << sa.asString())
Socket* s = new Socket;
uint16_t lport = s->listen(sa, backlog);
QPID_LOG(debug, "Listened to: " << lport);
listeners.push_back(s);
listeningPort = lport;
// Try any other resolved addresses
while (sa.nextAddress()) {
// Hack to ensure that all listening connections are on the same port
sa.setAddrInfoPort(listeningPort);
QPID_LOG(info, "Listening to: " << sa.asString())
Socket* s = new Socket;
uint16_t lport = s->listen(sa, backlog);
QPID_LOG(debug, "Listened to: " << lport);
listeners.push_back(s);
}
}
void AsynchIOProtocolFactory::established(Poller::shared_ptr poller, const Socket& s,
ConnectionCodec::Factory* f, bool isClient) {
AsynchIOHandler* async = new AsynchIOHandler(s.getFullAddress(), f);
if (tcpNoDelay) {
s.setTcpNoDelay();
QPID_LOG(info, "Set TCP_NODELAY on connection to " << s.getPeerAddress());
}
if (isClient)
async->setClient();
AsynchIO* aio = AsynchIO::create
(s,
boost::bind(&AsynchIOHandler::readbuff, async, _1, _2),
boost::bind(&AsynchIOHandler::eof, async, _1),
boost::bind(&AsynchIOHandler::disconnect, async, _1),
boost::bind(&AsynchIOHandler::closedSocket, async, _1, _2),
boost::bind(&AsynchIOHandler::nobuffs, async, _1),
boost::bind(&AsynchIOHandler::idle, async, _1));
async->init(aio, brokerTimer, maxNegotiateTime);
aio->start(poller);
}
uint16_t AsynchIOProtocolFactory::getPort() const {
return listeningPort; // Immutable no need for lock.
}
void AsynchIOProtocolFactory::accept(Poller::shared_ptr poller,
ConnectionCodec::Factory* fact) {
for (unsigned i = 0; i<listeners.size(); ++i) {
acceptors.push_back(
AsynchAcceptor::create(listeners[i],
boost::bind(&AsynchIOProtocolFactory::established, this, poller, _1, fact, false)));
acceptors[i].start(poller);
}
}
void AsynchIOProtocolFactory::connectFailed(
const Socket& s, int ec, const std::string& emsg,
ConnectFailedCallback failedCb)
{
failedCb(ec, emsg);
s.close();
delete &s;
}
void AsynchIOProtocolFactory::connect(
Poller::shared_ptr poller,
const std::string& host, const std::string& port,
ConnectionCodec::Factory* fact,
ConnectFailedCallback failed)
{
// Note that the following logic does not cause a memory leak.
// The allocated Socket is freed either by the AsynchConnector
// upon connection failure or by the AsynchIO upon connection
// shutdown. The allocated AsynchConnector frees itself when it
// is no longer needed.
Socket* socket = new Socket();
try {
AsynchConnector* c = AsynchConnector::create(
*socket,
host,
port,
boost::bind(&AsynchIOProtocolFactory::established,
this, poller, _1, fact, true),
boost::bind(&AsynchIOProtocolFactory::connectFailed,
this, _1, _2, _3, failed));
c->start(poller);
} catch (std::exception&) {
// TODO: Design question - should we do the error callback and also throw?
int errCode = socket->getError();
connectFailed(*socket, errCode, strError(errCode), failed);
throw;
}
}
}} // namespace qpid::sys
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