More stack->heap

node/OutboundMulticast.cpp

@@ -91,8 +91,8 @@ void OutboundMulticast::sendOnly(const RuntimeEnvironment *RR,void *tPtr,const A
 		_packet.setDestination(toAddr2);
 		RR->node->expectReplyTo(_packet.packetId());
 
-		Packet tmp(_packet); // make a copy of packet so as not to garble the original -- GitHub issue #461
-		RR->sw->send(tPtr,tmp,true);
+		_tmp = _packet;
+		RR->sw->send(tPtr,_tmp,true);
 	}
 }
 

node/OutboundMulticast.hpp

@@ -161,7 +161,7 @@ private:
 	unsigned int _limit;
 	unsigned int _frameLen;
 	unsigned int _etherType;
-	Packet _packet;
+	Packet _packet,_tmp;
 	std::vector<Address> _alreadySentTo;
 	uint8_t _frameData[ZT_MAX_MTU];
 };