iOS: Screen locking fix (#109)

* Disconnect from game when screen locks

* Fix socket behaviour on iOS

src/client/inputhandler.cpp

@@ -22,6 +22,10 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "inputhandler.h"
 #include "mainmenumanager.h"
 
+#ifdef __IOS__
+extern void external_exit_game();
+#endif
+
 bool MyEventReceiver::OnEvent(const SEvent &event)
 {
 	/*
@@ -58,6 +62,15 @@ bool MyEventReceiver::OnEvent(const SEvent &event)
 	}
 #endif
 
+#ifdef __IOS__
+	if (event.EventType == irr::EET_APPLICATION_EVENT) {
+		if (event.ApplicationEvent.EventType == irr::EAET_WILL_PAUSE)
+			external_exit_game();
+
+		return true;
+	}
+#endif
+
 	if (event.EventType == irr::EET_JOYSTICK_INPUT_EVENT) {
 		/* TODO add a check like:
 		if (event.JoystickEvent != joystick_we_listen_for)

src/game.cpp

@@ -4884,6 +4884,13 @@ void external_pause_game()
 	g_game->pauseGame();
 }
 
+void external_exit_game()
+{
+	if (!g_game)
+		return;
+	g_gamecallback->disconnect();
+}
+
 void external_statustext(const char *text, float duration)
 {
 	if (!g_game)

src/network/connection.cpp

@@ -2166,6 +2166,9 @@ void ConnectionReceiveThread::receive()
 			Address sender;
 			s32 received_size = m_connection->m_udpSocket.Receive(sender, *packetdata, packet_maxsize);
 
+			if (received_size == -1)
+				break;
+
 			if ((received_size < BASE_HEADER_SIZE) ||
 				(readU32(&packetdata[0]) != m_connection->GetProtocolID()))
 			{

src/socket.cpp

@@ -348,6 +348,11 @@ bool UDPSocket::init(bool ipv6, bool noExceptions)
 
 	setTimeoutMs(0);
 
+#ifdef __IOS__
+	int val = 1;
+	setsockopt(m_handle, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof(val));
+#endif
+
 	return true;
 }