rob@76: /*
rob@76: 	oscpack -- Open Sound Control (OSC) packet manipulation library
rob@76: 	http://www.rossbencina.com/code/oscpack
rob@76: 
rob@76: 	Copyright (c) 2004-2013 Ross Bencina <rossb@audiomulch.com>
rob@76: 
rob@76: 	Permission is hereby granted, free of charge, to any person obtaining
rob@76: 	a copy of this software and associated documentation files
rob@76: 	(the "Software"), to deal in the Software without restriction,
rob@76: 	including without limitation the rights to use, copy, modify, merge,
rob@76: 	publish, distribute, sublicense, and/or sell copies of the Software,
rob@76: 	and to permit persons to whom the Software is furnished to do so,
rob@76: 	subject to the following conditions:
rob@76: 
rob@76: 	The above copyright notice and this permission notice shall be
rob@76: 	included in all copies or substantial portions of the Software.
rob@76: 
rob@76: 	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
rob@76: 	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
rob@76: 	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
rob@76: 	IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
rob@76: 	ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
rob@76: 	CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
rob@76: 	WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
rob@76: */
rob@76: 
rob@76: /*
rob@76: 	The text above constitutes the entire oscpack license; however, 
rob@76: 	the oscpack developer(s) also make the following non-binding requests:
rob@76: 
rob@76: 	Any person wishing to distribute modifications to the Software is
rob@76: 	requested to send the modifications to the original developer so that
rob@76: 	they can be incorporated into the canonical version. It is also 
rob@76: 	requested that these non-binding requests be included whenever the
rob@76: 	above license is reproduced.
rob@76: */
rob@76: #include "ip/UdpSocket.h"
rob@76: 
rob@76: #include <pthread.h>
rob@76: #include <unistd.h>
rob@76: #include <stdlib.h>
rob@76: #include <stdio.h>
rob@76: #include <netdb.h>
rob@76: #include <sys/types.h>
rob@76: #include <sys/socket.h>
rob@76: #include <sys/time.h>
rob@76: #include <netinet/in.h> // for sockaddr_in
rob@76: 
rob@76: #include <signal.h>
rob@76: #include <math.h>
rob@76: #include <errno.h>
rob@76: #include <string.h> 
rob@76: 
rob@76: #include <algorithm>
rob@76: #include <cassert>
rob@76: #include <cstring> // for memset
rob@76: #include <stdexcept>
rob@76: #include <vector>
rob@76: 
rob@76: #include "ip/PacketListener.h"
rob@76: #include "ip/TimerListener.h"
rob@76: 
rob@76: 
rob@76: #if defined(__APPLE__) && !defined(_SOCKLEN_T)
rob@76: // pre system 10.3 didn't have socklen_t
rob@76: typedef ssize_t socklen_t;
rob@76: #endif
rob@76: 
rob@76: 
rob@76: static void SockaddrFromIpEndpointName( struct sockaddr_in& sockAddr, const IpEndpointName& endpoint )
rob@76: {
rob@76:     std::memset( (char *)&sockAddr, 0, sizeof(sockAddr ) );
rob@76:     sockAddr.sin_family = AF_INET;
rob@76: 
rob@76: 	sockAddr.sin_addr.s_addr = 
rob@76: 		(endpoint.address == IpEndpointName::ANY_ADDRESS)
rob@76: 		? INADDR_ANY
rob@76: 		: htonl( endpoint.address );
rob@76: 
rob@76: 	sockAddr.sin_port =
rob@76: 		(endpoint.port == IpEndpointName::ANY_PORT)
rob@76: 		? 0
rob@76: 		: htons( endpoint.port );
rob@76: }
rob@76: 
rob@76: 
rob@76: static IpEndpointName IpEndpointNameFromSockaddr( const struct sockaddr_in& sockAddr )
rob@76: {
rob@76: 	return IpEndpointName( 
rob@76: 		(sockAddr.sin_addr.s_addr == INADDR_ANY) 
rob@76: 			? IpEndpointName::ANY_ADDRESS 
rob@76: 			: ntohl( sockAddr.sin_addr.s_addr ),
rob@76: 		(sockAddr.sin_port == 0)
rob@76: 			? IpEndpointName::ANY_PORT
rob@76: 			: ntohs( sockAddr.sin_port )
rob@76: 		);
rob@76: }
rob@76: 
rob@76: 
rob@76: class UdpSocket::Implementation{
rob@76: 	bool isBound_;
rob@76: 	bool isConnected_;
rob@76: 
rob@76: 	int socket_;
rob@76: 	struct sockaddr_in connectedAddr_;
rob@76: 	struct sockaddr_in sendToAddr_;
rob@76: 
rob@76: public:
rob@76: 
rob@76: 	Implementation()
rob@76: 		: isBound_( false )
rob@76: 		, isConnected_( false )
rob@76: 		, socket_( -1 )
rob@76: 	{
rob@76: 		if( (socket_ = socket( AF_INET, SOCK_DGRAM, 0 )) == -1 ){
rob@76:             throw std::runtime_error("unable to create udp socket\n");
rob@76:         }
rob@76: 
rob@76: 		std::memset( &sendToAddr_, 0, sizeof(sendToAddr_) );
rob@76:         sendToAddr_.sin_family = AF_INET;
rob@76: 	}
rob@76: 
rob@76: 	~Implementation()
rob@76: 	{
rob@76: 		if (socket_ != -1) close(socket_);
rob@76: 	}
rob@76: 
rob@76: 	void SetEnableBroadcast( bool enableBroadcast )
rob@76: 	{
rob@76: 		int broadcast = (enableBroadcast) ? 1 : 0; // int on posix
rob@76: 		setsockopt(socket_, SOL_SOCKET, SO_BROADCAST, &broadcast, sizeof(broadcast));
rob@76: 	}
rob@76: 
rob@76: 	void SetAllowReuse( bool allowReuse )
rob@76: 	{
rob@76: 		int reuseAddr = (allowReuse) ? 1 : 0; // int on posix
rob@76: 		setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR, &reuseAddr, sizeof(reuseAddr));
rob@76: 
rob@76: #ifdef __APPLE__
rob@76: 		// needed also for OS X - enable multiple listeners for a single port on same network interface
rob@76: 		int reusePort = (allowReuse) ? 1 : 0; // int on posix
rob@76: 		setsockopt(socket_, SOL_SOCKET, SO_REUSEPORT, &reusePort, sizeof(reusePort));
rob@76: #endif
rob@76: 	}
rob@76: 
rob@76: 	IpEndpointName LocalEndpointFor( const IpEndpointName& remoteEndpoint ) const
rob@76: 	{
rob@76: 		assert( isBound_ );
rob@76: 
rob@76: 		// first connect the socket to the remote server
rob@76:         
rob@76:         struct sockaddr_in connectSockAddr;
rob@76: 		SockaddrFromIpEndpointName( connectSockAddr, remoteEndpoint );
rob@76:        
rob@76:         if (connect(socket_, (struct sockaddr *)&connectSockAddr, sizeof(connectSockAddr)) < 0) {
rob@76:             throw std::runtime_error("unable to connect udp socket\n");
rob@76:         }
rob@76: 
rob@76:         // get the address
rob@76: 
rob@76:         struct sockaddr_in sockAddr;
rob@76:         std::memset( (char *)&sockAddr, 0, sizeof(sockAddr ) );
rob@76:         socklen_t length = sizeof(sockAddr);
rob@76:         if (getsockname(socket_, (struct sockaddr *)&sockAddr, &length) < 0) {
rob@76:             throw std::runtime_error("unable to getsockname\n");
rob@76:         }
rob@76:         
rob@76: 		if( isConnected_ ){
rob@76: 			// reconnect to the connected address
rob@76: 			
rob@76: 			if (connect(socket_, (struct sockaddr *)&connectedAddr_, sizeof(connectedAddr_)) < 0) {
rob@76: 				throw std::runtime_error("unable to connect udp socket\n");
rob@76: 			}
rob@76: 
rob@76: 		}else{
rob@76: 			// unconnect from the remote address
rob@76: 		
rob@76: 			struct sockaddr_in unconnectSockAddr;
rob@76: 			std::memset( (char *)&unconnectSockAddr, 0, sizeof(unconnectSockAddr ) );
rob@76: 			unconnectSockAddr.sin_family = AF_UNSPEC;
rob@76: 			// address fields are zero
rob@76: 			int connectResult = connect(socket_, (struct sockaddr *)&unconnectSockAddr, sizeof(unconnectSockAddr));
rob@76: 			if ( connectResult < 0 && errno != EAFNOSUPPORT ) {
rob@76: 				throw std::runtime_error("unable to un-connect udp socket\n");
rob@76: 			}
rob@76: 		}
rob@76: 
rob@76: 		return IpEndpointNameFromSockaddr( sockAddr );
rob@76: 	}
rob@76: 
rob@76: 	void Connect( const IpEndpointName& remoteEndpoint )
rob@76: 	{
rob@76: 		SockaddrFromIpEndpointName( connectedAddr_, remoteEndpoint );
rob@76:        
rob@76:         if (connect(socket_, (struct sockaddr *)&connectedAddr_, sizeof(connectedAddr_)) < 0) {
rob@76:             throw std::runtime_error("unable to connect udp socket\n");
rob@76:         }
rob@76: 
rob@76: 		isConnected_ = true;
rob@76: 	}
rob@76: 
rob@76: 	void Send( const char *data, std::size_t size )
rob@76: 	{
rob@76: 		assert( isConnected_ );
rob@76: 
rob@76:         send( socket_, data, size, 0 );
rob@76: 	}
rob@76: 
rob@76:     void SendTo( const IpEndpointName& remoteEndpoint, const char *data, std::size_t size )
rob@76: 	{
rob@76: 		sendToAddr_.sin_addr.s_addr = htonl( remoteEndpoint.address );
rob@76:         sendToAddr_.sin_port = htons( remoteEndpoint.port );
rob@76: 
rob@76:         sendto( socket_, data, size, 0, (sockaddr*)&sendToAddr_, sizeof(sendToAddr_) );
rob@76: 	}
rob@76: 
rob@76: 	void Bind( const IpEndpointName& localEndpoint )
rob@76: 	{
rob@76: 		struct sockaddr_in bindSockAddr;
rob@76: 		SockaddrFromIpEndpointName( bindSockAddr, localEndpoint );
rob@76: 
rob@76:         if (bind(socket_, (struct sockaddr *)&bindSockAddr, sizeof(bindSockAddr)) < 0) {
rob@76:             throw std::runtime_error("unable to bind udp socket\n");
rob@76:         }
rob@76: 
rob@76: 		isBound_ = true;
rob@76: 	}
rob@76: 
rob@76: 	bool IsBound() const { return isBound_; }
rob@76: 
rob@76:     std::size_t ReceiveFrom( IpEndpointName& remoteEndpoint, char *data, std::size_t size )
rob@76: 	{
rob@76: 		assert( isBound_ );
rob@76: 
rob@76: 		struct sockaddr_in fromAddr;
rob@76:         socklen_t fromAddrLen = sizeof(fromAddr);
rob@76:              	 
rob@76:         ssize_t result = recvfrom(socket_, data, size, 0,
rob@76:                     (struct sockaddr *) &fromAddr, (socklen_t*)&fromAddrLen);
rob@76: 		if( result < 0 )
rob@76: 			return 0;
rob@76: 
rob@76: 		remoteEndpoint.address = ntohl(fromAddr.sin_addr.s_addr);
rob@76: 		remoteEndpoint.port = ntohs(fromAddr.sin_port);
rob@76: 
rob@76: 		return (std::size_t)result;
rob@76: 	}
rob@76: 
rob@76: 	int Socket() { return socket_; }
rob@76: };
rob@76: 
rob@76: UdpSocket::UdpSocket()
rob@76: {
rob@76: 	impl_ = new Implementation();
rob@76: }
rob@76: 
rob@76: UdpSocket::~UdpSocket()
rob@76: {
rob@76: 	delete impl_;
rob@76: }
rob@76: 
rob@76: void UdpSocket::SetEnableBroadcast( bool enableBroadcast )
rob@76: {
rob@76:     impl_->SetEnableBroadcast( enableBroadcast );
rob@76: }
rob@76: 
rob@76: void UdpSocket::SetAllowReuse( bool allowReuse )
rob@76: {
rob@76:     impl_->SetAllowReuse( allowReuse );
rob@76: }
rob@76: 
rob@76: IpEndpointName UdpSocket::LocalEndpointFor( const IpEndpointName& remoteEndpoint ) const
rob@76: {
rob@76: 	return impl_->LocalEndpointFor( remoteEndpoint );
rob@76: }
rob@76: 
rob@76: void UdpSocket::Connect( const IpEndpointName& remoteEndpoint )
rob@76: {
rob@76: 	impl_->Connect( remoteEndpoint );
rob@76: }
rob@76: 
rob@76: void UdpSocket::Send( const char *data, std::size_t size )
rob@76: {
rob@76: 	impl_->Send( data, size );
rob@76: }
rob@76: 
rob@76: void UdpSocket::SendTo( const IpEndpointName& remoteEndpoint, const char *data, std::size_t size )
rob@76: {
rob@76: 	impl_->SendTo( remoteEndpoint, data, size );
rob@76: }
rob@76: 
rob@76: void UdpSocket::Bind( const IpEndpointName& localEndpoint )
rob@76: {
rob@76: 	impl_->Bind( localEndpoint );
rob@76: }
rob@76: 
rob@76: bool UdpSocket::IsBound() const
rob@76: {
rob@76: 	return impl_->IsBound();
rob@76: }
rob@76: 
rob@76: std::size_t UdpSocket::ReceiveFrom( IpEndpointName& remoteEndpoint, char *data, std::size_t size )
rob@76: {
rob@76: 	return impl_->ReceiveFrom( remoteEndpoint, data, size );
rob@76: }
rob@76: 
rob@76: 
rob@76: struct AttachedTimerListener{
rob@76: 	AttachedTimerListener( int id, int p, TimerListener *tl )
rob@76: 		: initialDelayMs( id )
rob@76: 		, periodMs( p )
rob@76: 		, listener( tl ) {}
rob@76: 	int initialDelayMs;
rob@76: 	int periodMs;
rob@76: 	TimerListener *listener;
rob@76: };
rob@76: 
rob@76: 
rob@76: static bool CompareScheduledTimerCalls( 
rob@76: 		const std::pair< double, AttachedTimerListener > & lhs, const std::pair< double, AttachedTimerListener > & rhs )
rob@76: {
rob@76: 	return lhs.first < rhs.first;
rob@76: }
rob@76: 
rob@76: 
rob@76: SocketReceiveMultiplexer *multiplexerInstanceToAbortWithSigInt_ = 0;
rob@76: 
rob@76: extern "C" /*static*/ void InterruptSignalHandler( int );
rob@76: /*static*/ void InterruptSignalHandler( int )
rob@76: {
rob@76: 	multiplexerInstanceToAbortWithSigInt_->AsynchronousBreak();
rob@76: 	signal( SIGINT, SIG_DFL );
rob@76: }
rob@76: 
rob@76: 
rob@76: class SocketReceiveMultiplexer::Implementation{
rob@76: 	std::vector< std::pair< PacketListener*, UdpSocket* > > socketListeners_;
rob@76: 	std::vector< AttachedTimerListener > timerListeners_;
rob@76: 
rob@76: 	volatile bool break_;
rob@76: 	int breakPipe_[2]; // [0] is the reader descriptor and [1] the writer
rob@76: 
rob@76: 	double GetCurrentTimeMs() const
rob@76: 	{
rob@76: 		struct timeval t;
rob@76: 
rob@76: 		gettimeofday( &t, 0 );
rob@76: 
rob@76: 		return ((double)t.tv_sec*1000.) + ((double)t.tv_usec / 1000.);
rob@76: 	}
rob@76: 
rob@76: public:
rob@76:     Implementation()
rob@76: 	{
rob@76: 		if( pipe(breakPipe_) != 0 )
rob@76: 			throw std::runtime_error( "creation of asynchronous break pipes failed\n" );
rob@76: 	}
rob@76: 
rob@76:     ~Implementation()
rob@76: 	{
rob@76: 		close( breakPipe_[0] );
rob@76: 		close( breakPipe_[1] );
rob@76: 	}
rob@76: 
rob@76:     void AttachSocketListener( UdpSocket *socket, PacketListener *listener )
rob@76: 	{
rob@76: 		assert( std::find( socketListeners_.begin(), socketListeners_.end(), std::make_pair(listener, socket) ) == socketListeners_.end() );
rob@76: 		// we don't check that the same socket has been added multiple times, even though this is an error
rob@76: 		socketListeners_.push_back( std::make_pair( listener, socket ) );
rob@76: 	}
rob@76: 
rob@76:     void DetachSocketListener( UdpSocket *socket, PacketListener *listener )
rob@76: 	{
rob@76: 		std::vector< std::pair< PacketListener*, UdpSocket* > >::iterator i = 
rob@76: 				std::find( socketListeners_.begin(), socketListeners_.end(), std::make_pair(listener, socket) );
rob@76: 		assert( i != socketListeners_.end() );
rob@76: 
rob@76: 		socketListeners_.erase( i );
rob@76: 	}
rob@76: 
rob@76:     void AttachPeriodicTimerListener( int periodMilliseconds, TimerListener *listener )
rob@76: 	{
rob@76: 		timerListeners_.push_back( AttachedTimerListener( periodMilliseconds, periodMilliseconds, listener ) );
rob@76: 	}
rob@76: 
rob@76: 	void AttachPeriodicTimerListener( int initialDelayMilliseconds, int periodMilliseconds, TimerListener *listener )
rob@76: 	{
rob@76: 		timerListeners_.push_back( AttachedTimerListener( initialDelayMilliseconds, periodMilliseconds, listener ) );
rob@76: 	}
rob@76: 
rob@76:     void DetachPeriodicTimerListener( TimerListener *listener )
rob@76: 	{
rob@76: 		std::vector< AttachedTimerListener >::iterator i = timerListeners_.begin();
rob@76: 		while( i != timerListeners_.end() ){
rob@76: 			if( i->listener == listener )
rob@76: 				break;
rob@76: 			++i;
rob@76: 		}
rob@76: 
rob@76: 		assert( i != timerListeners_.end() );
rob@76: 
rob@76: 		timerListeners_.erase( i );
rob@76: 	}
rob@76: 
rob@76:     void Run()
rob@76: 	{
rob@76: 		break_ = false;
rob@76:         char *data = 0;
rob@76:         
rob@76:         try{
rob@76:             
rob@76:             // configure the master fd_set for select()
rob@76: 
rob@76:             fd_set masterfds, tempfds;
rob@76:             FD_ZERO( &masterfds );
rob@76:             FD_ZERO( &tempfds );
rob@76:             
rob@76:             // in addition to listening to the inbound sockets we
rob@76:             // also listen to the asynchronous break pipe, so that AsynchronousBreak()
rob@76:             // can break us out of select() from another thread.
rob@76:             FD_SET( breakPipe_[0], &masterfds );
rob@76:             int fdmax = breakPipe_[0];		
rob@76: 
rob@76:             for( std::vector< std::pair< PacketListener*, UdpSocket* > >::iterator i = socketListeners_.begin();
rob@76:                     i != socketListeners_.end(); ++i ){
rob@76: 
rob@76:                 if( fdmax < i->second->impl_->Socket() )
rob@76:                     fdmax = i->second->impl_->Socket();
rob@76:                 FD_SET( i->second->impl_->Socket(), &masterfds );
rob@76:             }
rob@76: 
rob@76: 
rob@76:             // configure the timer queue
rob@76:             double currentTimeMs = GetCurrentTimeMs();
rob@76: 
rob@76:             // expiry time ms, listener
rob@76:             std::vector< std::pair< double, AttachedTimerListener > > timerQueue_;
rob@76:             for( std::vector< AttachedTimerListener >::iterator i = timerListeners_.begin();
rob@76:                     i != timerListeners_.end(); ++i )
rob@76:                 timerQueue_.push_back( std::make_pair( currentTimeMs + i->initialDelayMs, *i ) );
rob@76:             std::sort( timerQueue_.begin(), timerQueue_.end(), CompareScheduledTimerCalls );
rob@76: 
rob@76:             const int MAX_BUFFER_SIZE = 4098;
rob@76:             data = new char[ MAX_BUFFER_SIZE ];
rob@76:             IpEndpointName remoteEndpoint;
rob@76: 
rob@76:             struct timeval timeout;
rob@76: 
rob@76:             while( !break_ ){
rob@76:                 tempfds = masterfds;
rob@76: 
rob@76:                 struct timeval *timeoutPtr = 0;
rob@76:                 if( !timerQueue_.empty() ){
rob@76:                     double timeoutMs = timerQueue_.front().first - GetCurrentTimeMs();
rob@76:                     if( timeoutMs < 0 )
rob@76:                         timeoutMs = 0;
rob@76:                 
rob@76:                     long timoutSecondsPart = (long)(timeoutMs * .001);
rob@76:                     timeout.tv_sec = (time_t)timoutSecondsPart;
rob@76:                     // 1000000 microseconds in a second
rob@76:                     timeout.tv_usec = (suseconds_t)((timeoutMs - (timoutSecondsPart * 1000)) * 1000);
rob@76:                     timeoutPtr = &timeout;
rob@76:                 }
rob@76: 
rob@76:                 if( select( fdmax + 1, &tempfds, 0, 0, timeoutPtr ) < 0 ){
rob@76:                     if( break_ ){
rob@76:                         break;
rob@76:                     }else if( errno == EINTR ){
rob@76:                         // on returning an error, select() doesn't clear tempfds.
rob@76:                         // so tempfds would remain all set, which would cause read( breakPipe_[0]...
rob@76:                         // below to block indefinitely. therefore if select returns EINTR we restart
rob@76:                         // the while() loop instead of continuing on to below.
rob@76:                         continue;
rob@76:                     }else{
rob@76:                         throw std::runtime_error("select failed\n");
rob@76:                     }
rob@76:                 }
rob@76: 
rob@76:                 if( FD_ISSET( breakPipe_[0], &tempfds ) ){
rob@76:                     // clear pending data from the asynchronous break pipe
rob@76:                     char c;
rob@76:                     read( breakPipe_[0], &c, 1 );
rob@76:                 }
rob@76:                 
rob@76:                 if( break_ )
rob@76:                     break;
rob@76: 
rob@76:                 for( std::vector< std::pair< PacketListener*, UdpSocket* > >::iterator i = socketListeners_.begin();
rob@76:                         i != socketListeners_.end(); ++i ){
rob@76: 
rob@76:                     if( FD_ISSET( i->second->impl_->Socket(), &tempfds ) ){
rob@76: 
rob@76:                         std::size_t size = i->second->ReceiveFrom( remoteEndpoint, data, MAX_BUFFER_SIZE );
rob@76:                         if( size > 0 ){
rob@76:                             i->first->ProcessPacket( data, (int)size, remoteEndpoint );
rob@76:                             if( break_ )
rob@76:                                 break;
rob@76:                         }
rob@76:                     }
rob@76:                 }
rob@76: 
rob@76:                 // execute any expired timers
rob@76:                 currentTimeMs = GetCurrentTimeMs();
rob@76:                 bool resort = false;
rob@76:                 for( std::vector< std::pair< double, AttachedTimerListener > >::iterator i = timerQueue_.begin();
rob@76:                         i != timerQueue_.end() && i->first <= currentTimeMs; ++i ){
rob@76: 
rob@76:                     i->second.listener->TimerExpired();
rob@76:                     if( break_ )
rob@76:                         break;
rob@76: 
rob@76:                     i->first += i->second.periodMs;
rob@76:                     resort = true;
rob@76:                 }
rob@76:                 if( resort )
rob@76:                     std::sort( timerQueue_.begin(), timerQueue_.end(), CompareScheduledTimerCalls );
rob@76:             }
rob@76: 
rob@76:             delete [] data;
rob@76:         }catch(...){
rob@76:             if( data )
rob@76:                 delete [] data;
rob@76:             throw;
rob@76:         }
rob@76: 	}
rob@76: 
rob@76:     void Break()
rob@76: 	{
rob@76: 		break_ = true;
rob@76: 	}
rob@76: 
rob@76:     void AsynchronousBreak()
rob@76: 	{
rob@76: 		break_ = true;
rob@76: 
rob@76: 		// Send a termination message to the asynchronous break pipe, so select() will return
rob@76: 		write( breakPipe_[1], "!", 1 );
rob@76: 	}
rob@76: };
rob@76: 
rob@76: 
rob@76: 
rob@76: SocketReceiveMultiplexer::SocketReceiveMultiplexer()
rob@76: {
rob@76: 	impl_ = new Implementation();
rob@76: }
rob@76: 
rob@76: SocketReceiveMultiplexer::~SocketReceiveMultiplexer()
rob@76: {	
rob@76: 	delete impl_;
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::AttachSocketListener( UdpSocket *socket, PacketListener *listener )
rob@76: {
rob@76: 	impl_->AttachSocketListener( socket, listener );
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::DetachSocketListener( UdpSocket *socket, PacketListener *listener )
rob@76: {
rob@76: 	impl_->DetachSocketListener( socket, listener );
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::AttachPeriodicTimerListener( int periodMilliseconds, TimerListener *listener )
rob@76: {
rob@76: 	impl_->AttachPeriodicTimerListener( periodMilliseconds, listener );
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::AttachPeriodicTimerListener( int initialDelayMilliseconds, int periodMilliseconds, TimerListener *listener )
rob@76: {
rob@76: 	impl_->AttachPeriodicTimerListener( initialDelayMilliseconds, periodMilliseconds, listener );
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::DetachPeriodicTimerListener( TimerListener *listener )
rob@76: {
rob@76: 	impl_->DetachPeriodicTimerListener( listener );
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::Run()
rob@76: {
rob@76: 	impl_->Run();
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::RunUntilSigInt()
rob@76: {
rob@76: 	assert( multiplexerInstanceToAbortWithSigInt_ == 0 ); /* at present we support only one multiplexer instance running until sig int */
rob@76: 	multiplexerInstanceToAbortWithSigInt_ = this;
rob@76: 	signal( SIGINT, InterruptSignalHandler );
rob@76: 	impl_->Run();
rob@76: 	signal( SIGINT, SIG_DFL );
rob@76: 	multiplexerInstanceToAbortWithSigInt_ = 0;
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::Break()
rob@76: {
rob@76: 	impl_->Break();
rob@76: }
rob@76: 
rob@76: void SocketReceiveMultiplexer::AsynchronousBreak()
rob@76: {
rob@76: 	impl_->AsynchronousBreak();
rob@76: }
rob@76: