diff -r d0fba0d7ad03 -r 0b0bc8045d28 sources/network/packetqueue.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sources/network/packetqueue.h	Wed Jan 27 12:34:56 2021 +0200
@@ -0,0 +1,62 @@
+/*
+	Copyright 2016 Teemu Piippo
+	All rights reserved.
+
+	Redistribution and use in source and binary forms, with or without
+	modification, are permitted provided that the following conditions
+	are met:
+
+	1. Redistributions of source code must retain the above copyright
+	   notice, this list of conditions and the following disclaimer.
+	2. Redistributions in binary form must reproduce the above copyright
+	   notice, this list of conditions and the following disclaimer in the
+	   documentation and/or other materials provided with the distribution.
+	3. Neither the name of the copyright holder nor the names of its
+	   contributors may be used to endorse or promote products derived from
+	   this software without specific prior written permission.
+
+	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+	TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+	PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
+	OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+	EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+	PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+	PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+	LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+	NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#pragma once
+#include <map>
+#include <set>
+#include "../main.h"
+#include "../list.h"
+BEGIN_ZFC_NAMESPACE
+
+/*!
+ * \brief The PacketQueue class stores packets awaiting processing.
+ *
+ * The UDP protocol makes no guarantees of packet delivery. Packets may wind up being dropped, or delivered in the wrong
+ * order. This class mitigates that issue by storing the packets into a queue, and popping packets in order.
+ */
+class PacketQueue
+{
+public:
+	PacketQueue();
+
+	bool addPacket(unsigned int sequenceNumber, const ByteArray &data);
+	std::set<unsigned int> getWaitingPackets() const;
+	std::set<int> getLostPackets() const;
+	int getNextSequenceNumber() const;
+	bool hasPacketsToPop() const;
+	bool isStuck() const;
+	bool popNextPacket(ByteArray& packet);
+
+private:
+	std::map<unsigned int, ByteArray> m_queue;
+	unsigned int m_currentSequenceNumber;
+};
+
+END_ZFC_NAMESPACE