Network/UdpSocket: Add broadcasting option

Former-commit-id: bde428efc5e9c77cf3e64ec04d58d72613f1d8de

include/Nazara/Network/UdpSocket.hpp

@@ -26,10 +26,14 @@ namespace Nz
 
 			inline bool Create(NetProtocol protocol);
 
+			void EnableBroadcasting(bool broadcasting);
+				
 			inline IpAddress GetBoundAddress() const;
 			inline UInt16 GetBoundPort() const;
 			inline SocketState GetState() const;
 
+			inline bool IsBroadcastingEnabled() const;
+
 			unsigned int QueryMaxDatagramSize();
 
 			bool Receive(void* buffer, std::size_t size, IpAddress* from, std::size_t* received);
@@ -42,6 +46,7 @@ namespace Nz
 
 			IpAddress m_boundAddress;
 			SocketState m_state;
+			bool m_isBroadCastingEnabled;
 	};
 }
 

include/Nazara/Network/UdpSocket.inl

@@ -61,6 +61,11 @@ namespace Nz
 	{
 		return m_state;
 	}
+
+	inline bool UdpSocket::IsBroadcastingEnabled() const
+	{
+		return m_isBroadCastingEnabled;
+	}
 }
 
 #include <Nazara/Network/DebugOff.hpp>

src/Nazara/Network/UdpSocket.cpp

@@ -26,6 +26,17 @@ namespace Nz
 		return state;
 	}
 
+	void UdpSocket::EnableBroadcasting(bool broadcasting)
+	{
+		NazaraAssert(m_handle != SocketImpl::InvalidHandle, "Invalid handle");
+
+		if (m_isBroadCastingEnabled != broadcasting)
+		{
+			SocketImpl::SetBroadcasting(m_handle, broadcasting, &m_lastError);
+			m_isBroadCastingEnabled = broadcasting;
+		}
+	}
+
 	unsigned int UdpSocket::QueryMaxDatagramSize()
 	{
 		NazaraAssert(m_handle != SocketImpl::InvalidHandle, "Socket hasn't been created");
@@ -73,6 +84,7 @@ namespace Nz
 	void UdpSocket::OnOpened()
 	{
 		m_boundAddress = IpAddress::Invalid;
+		m_isBroadCastingEnabled = false;
 
 		UpdateState(SocketState_NotConnected);
 	}

src/Nazara/Network/Win32/SocketImpl.cpp

@@ -509,6 +509,25 @@ namespace Nz
 
 		return true;
 	}
+	
+	bool SocketImpl::SetBroadcasting(SocketHandle handle, bool broadcasting, SocketError* error)
+	{
+		NazaraAssert(handle != InvalidHandle, "Invalid handle");
+
+		BOOL option = broadcasting;
+		if (setsockopt(handle, SOL_SOCKET, SO_BROADCAST, reinterpret_cast<const char*>(&option), sizeof(option)) == SOCKET_ERROR)
+		{
+			if (error)
+				*error = TranslateWSAErrorToSocketError(WSAGetLastError());
+
+			return false; //< Error
+		}
+
+		if (error)
+			*error = SocketError_NoError;
+
+		return true;
+	}
 
 	bool SocketImpl::SetKeepAlive(SocketHandle handle, bool enabled, UInt64 msTime, UInt64 msInterval, SocketError* error)
 	{

src/Nazara/Network/Win32/SocketImpl.hpp

@@ -47,6 +47,7 @@ namespace Nz
 			static bool SendTo(SocketHandle handle, const void* buffer, int length, const IpAddress& to, int* sent, SocketError* error);
 
 			static bool SetBlocking(SocketHandle handle, bool blocking, SocketError* error = nullptr);
+			static bool SetBroadcasting(SocketHandle handle, bool broadcasting, SocketError* error = nullptr);
 			static bool SetKeepAlive(SocketHandle handle, bool enabled, UInt64 msTime, UInt64 msInterval, SocketError* error = nullptr);
 			static bool SetNoDelay(SocketHandle handle, bool nodelay, SocketError* error = nullptr);