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//
// MulticastSocketReceiver.cpp
//
// Created by Setsu on Feb 26, 2011.
// Copyright 2011 RoundSquare Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
//----------------------------------------
// include
//----------------------------------------
#include <Poco/Util/ServerApplication.h>
#include <Poco/Task.h>
#include <Poco/TaskManager.h>
#include <Poco/Net/Net.h>
#include <Poco/Net/MulticastSocket.h>
#include <Poco/Net/SocketAddress.h>
#include <Poco/Net/NetworkInterface.h>
#include <Poco/Net/IPAddress.h>
#include <Poco/Format.h>
#include <Poco/NumberParser.h>
#include <string>
//----------------------------------------
// const
//----------------------------------------
const Poco::Timespan::TimeDiff KWaitUSec(250000); // 250msec
//----------------------------------------
// ReceiverTask
//----------------------------------------
class ReceiverTask: public Poco::Task
{
public:
ReceiverTask(const std::vector<std::string>& args) : // args[0]: MulticastAddress, args[1]: MulticastPort
Poco::Task("ReceiverTask")
, m_family (Poco::Net::IPAddress(args[0]).family())
, m_port (Poco::NumberParser::parseUnsigned(args[1]))
, m_multicastSocket (Poco::Net::MulticastSocket(m_family))
, m_socketAddres (args[0], m_port)
, m_if (findInterface(m_family))
{
Poco::Logger& logger = Poco::Util::Application::instance().logger();
logger.information(Poco::format(" ReceiverTask start listening %s:%hu", args[0], m_port));
m_multicastSocket.bind(Poco::Net::SocketAddress(Poco::Net::IPAddress(m_family), m_socketAddres.port()), true);
m_multicastSocket.joinGroup(m_socketAddres.host(), m_if);
}
~ReceiverTask()
{
}
void runTask()
{
Poco::Logger& logger = Poco::Util::Application::instance().logger();
Poco::Timespan span(KWaitUSec);
while(!isCancelled())
{
if(m_multicastSocket.poll(span, Poco::Net::Socket::SELECT_READ))
{
try
{
char buffer[256];
Poco::Net::SocketAddress sender;
int n = m_multicastSocket.receiveFrom(buffer, sizeof(buffer), sender);
if(0 != n)
{
buffer[n] = 0;
logger.information(Poco::format(" ReceiverTask: received %d bytes (%s)", n, std::string(buffer)));
}
// m_multicastSocket.sendTo(buffer, n, sender); // for echo back
}
catch(Poco::Exception& exc)
{
logger.information(Poco::format(" ReceiverTask: %s", exc.displayText()));
}
}
}
}
private:
static Poco::Net::NetworkInterface findInterface(Poco::Net::IPAddress::Family family)
{
Poco::Net::NetworkInterface::NetworkInterfaceList ifs = Poco::Net::NetworkInterface::list();
for(Poco::Net::NetworkInterface::NetworkInterfaceList::const_iterator itr=ifs.begin(); itr!=ifs.end(); ++itr)
{
if((family == itr->address().family()) && itr->address().isUnicast() && !itr->address().isLoopback())
{
if( (Poco::Net::IPAddress::IPv4 == itr->address().family()) ||
(Poco::Net::IPAddress::IPv6 == itr->address().family() &&
std::string::npos != itr->address().toString().find("FE80::2")) )
// NOTE: "FE80::2" disables strange loppback address on Mac (fe80::1 <- usually ::1)
{
return *itr;
}
}
}
return Poco::Net::NetworkInterface();
}
Poco::Net::IPAddress::Family m_family;
Poco::UInt16 m_port;
Poco::Net::MulticastSocket m_multicastSocket;
Poco::Net::SocketAddress m_socketAddres;
Poco::Net::NetworkInterface m_if;
};
//----------------------------------------
// MulticastSocketReceiver
//----------------------------------------
class MulticastSocketReceiver: public Poco::Util::ServerApplication
{
public:
MulticastSocketReceiver()
{
}
protected:
void initialize(Application& self)
{
loadConfiguration(); // load default configuration files, if present
Poco::Util::ServerApplication::initialize(self);
logger().information(" - MulticastSocketReceiver starting up");
}
void uninitialize()
{
logger().information(" - MulticastSocketReceiver shutting down");
Poco::Util::ServerApplication::uninitialize();
}
int main(const std::vector<std::string>& args)
{
Poco::TaskManager tm;
tm.start(new ReceiverTask(args));
waitForTerminationRequest();
tm.cancelAll();
tm.joinAll();
return Application::EXIT_OK;
}
};
//----------------------------------------
// entry point
//----------------------------------------
POCO_SERVER_MAIN(MulticastSocketReceiver) |
