unreliable packets

include/blitz/godot/NetworkInterface.h

@@ -27,6 +27,8 @@ class NetworkInterface : public godot::Node, public protocol::PacketDispatcher {
 
   private:
 	void RecievePacketDataReliable(godot::PackedByteArray a_PacketData);
+	void RecievePacketDataUnreliable(godot::PackedByteArray a_PacketData);
+	void RecievePacketDataUnreliableOrdered(godot::PackedByteArray a_PacketData);
 
 	void OnPlayerConnected(PeerID a_PeerId);
 	void OnPlayerDisconnected(PeerID a_PeerId);

include/blitz/protocol/ByteBuffer.h

@@ -2,6 +2,7 @@
 
 #include <godot_cpp/variant/packed_byte_array.hpp>
 #include <godot_cpp/variant/string.hpp>
+#include <stdexcept>
 #include <vector>
 
 namespace blitz {
@@ -9,25 +10,17 @@ namespace protocol {
 
 class PlayerInfo;
 
-#define Operators(Type, GodotType)                                                                                                    \
-	ByteBuffer& operator>>(Type& a_Data) {                                                                                            \
-		a_Data = m_Buffer.decode_##GodotType(m_ReadOffset);                                                                           \
-		m_ReadOffset += sizeof(a_Data);                                                                                               \
-		return *this;                                                                                                                 \
-	}                                                                                                                                 \
-                                                                                                                                      \
-	ByteBuffer& operator<<(Type a_Data) {                                                                                             \
-		m_Buffer.resize(m_Buffer.size() + sizeof(a_Data));                                                                            \
-		m_Buffer.encode_##GodotType(m_Buffer.size() - sizeof(a_Data), a_Data);                                                        \
-		return *this;                                                                                                                 \
-	}
-
 class ByteBuffer {
   private:
 	godot::PackedByteArray m_Buffer;
 	std::size_t m_ReadOffset;
 
   public:
+	class ReadError : public std::runtime_error {
+	  public:
+		ReadError(const std::string& msg) : std::runtime_error(msg) {}
+	};
+
 	ByteBuffer(godot::PackedByteArray&& a_Buffer) : m_Buffer(std::move(a_Buffer)), m_ReadOffset(0) {}
 	ByteBuffer() : m_ReadOffset(0) {
 		m_Buffer.resize(0);
@@ -42,18 +35,30 @@ class ByteBuffer {
 	}
 
 	// Integers
-	Operators(int8_t, s8);
-	Operators(uint8_t, u8);
-	Operators(int16_t, s16);
-	Operators(uint16_t, u16);
-	Operators(int32_t, s32);
-	Operators(uint32_t, u32);
-	Operators(int64_t, s64);
-	Operators(uint64_t, u64);
+	ByteBuffer& operator<<(int8_t a_Data);
+	ByteBuffer& operator>>(int8_t& a_Data);
+	ByteBuffer& operator<<(uint8_t a_Data);
+	ByteBuffer& operator>>(uint8_t& a_Data);
 
-	// Reals
-	Operators(float, float);
-	Operators(double, double);
+	ByteBuffer& operator<<(int16_t a_Data);
+	ByteBuffer& operator>>(int16_t& a_Data);
+	ByteBuffer& operator<<(uint16_t a_Data);
+	ByteBuffer& operator>>(uint16_t& a_Data);
+
+	ByteBuffer& operator<<(int32_t a_Data);
+	ByteBuffer& operator>>(int32_t& a_Data);
+	ByteBuffer& operator<<(uint32_t a_Data);
+	ByteBuffer& operator>>(uint32_t& a_Data);
+
+	ByteBuffer& operator<<(int64_t a_Data);
+	ByteBuffer& operator>>(int64_t& a_Data);
+	ByteBuffer& operator<<(uint64_t a_Data);
+	ByteBuffer& operator>>(uint64_t& a_Data);
+
+	ByteBuffer& operator<<(float a_Data);
+	ByteBuffer& operator>>(float& a_Data);
+	ByteBuffer& operator<<(double a_Data);
+	ByteBuffer& operator>>(double& a_Data);
 
 	ByteBuffer& operator<<(const godot::String& a_Data);
 	ByteBuffer& operator>>(godot::String& a_Data);

include/blitz/protocol/PacketDeclare.h

@@ -12,7 +12,7 @@ namespace protocol {
  * \enum PacketSender
  * \brief Indicate who should send a packet
  */
-enum class PacketSender {
+enum class PacketSenderType {
 	/** Sent by clients and server */
 	Both,
 	/** Sent by clients to the server */
@@ -36,7 +36,7 @@ enum class PacketSender {
 	DeclarePacket(PlayerLeave, Reliable, Server) \
 	DeclarePacket(PlayerList, Reliable, Server) \
 	DeclarePacket(PlayerLogin, Reliable, Client) \
-	DeclarePacket(PlayerPositionAndRotation, Reliable, Both) \
+	DeclarePacket(PlayerPositionAndRotation, Unreliable, Both) \
 	DeclarePacket(PlayerShoot, Reliable, Both) \
 	DeclarePacket(PlayerStats, Reliable, Server) \
 	DeclarePacket(ServerConfig, Reliable, Server) \

include/blitz/protocol/PacketSender.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#include <blitz/protocol/PacketVisitor.h>
+
+namespace blitz {
+
+class NetworkInterface;
+
+namespace protocol {
+
+///////////////////////
+/* PacketBroadcaster */
+///////////////////////
+
+#define DeclarePacket(PacketName, Reliability, ...) void Visit(const protocol::packets::PacketName& a_Packet) override;
+
+class PacketBroadcaster : public protocol::PacketVisitor {
+  private:
+	NetworkInterface& m_NetworkInterface;
+
+  public:
+	PacketBroadcaster(NetworkInterface& a_NetworkInterface) : m_NetworkInterface(a_NetworkInterface) {}
+
+	void BroadcastPacket(const protocol::Packet& a_Packet) {
+		Check(a_Packet);
+	}
+
+	DeclareAllPacket()
+};
+
+
+
+
+
+
+//////////////////
+/* PacketSender */
+//////////////////
+class PacketSender : public protocol::PacketVisitor {
+  private:
+	NetworkInterface& m_NetworkInterface;
+	PeerID m_PeerId;
+
+  public:
+	PacketSender(PeerID a_PeerId, NetworkInterface& a_NetworkInterface) : m_PeerId(a_PeerId), m_NetworkInterface(a_NetworkInterface) {}
+
+	void SendPacket(const protocol::Packet& a_Packet) {
+		Check(a_Packet);
+	}
+
+	DeclareAllPacket()
+};
+
+#undef DeclarePacket
+
+}  // namespace protocol
+}  // namespace blitz

src/blitz/godot/NetworkInterface.cpp

@@ -1,21 +1,37 @@
 #include <blitz/godot/NetworkInterface.h>
 
 #include <blitz/protocol/PacketFactory.h>
+#include <blitz/protocol/PacketSender.h>
 #include <blitz/protocol/PacketSerializer.h>
+#include <blitz/protocol/PacketVisitor.h>
 #include <godot_cpp/classes/e_net_multiplayer_peer.hpp>
 #include <godot_cpp/classes/multiplayer_api.hpp>
 #include <godot_cpp/classes/packed_scene.hpp>
 #include <godot_cpp/classes/resource_loader.hpp>
 #include <godot_cpp/variant/utility_functions.hpp>
 
+
 namespace blitz {
 
+#define RPC_CONFIG(functionName, rpc_mode, transfer_mode, call_local, channel)                                                        \
+	{                                                                                                                                 \
+		Dictionary config;                                                                                                            \
+		config["rpc_mode"] = rpc_mode;                                                                                                \
+		config["transfer_mode"] = transfer_mode;                                                                                      \
+		config["call_local"] = call_local;                                                                                            \
+		config["channel"] = channel;                                                                                                  \
+		rpc_config(functionName, config);                                                                                             \
+	}
+
 static const char ServerScenePath[] = "res://Scenes/Network/server.tscn";
 
 using namespace godot;
 
 void NetworkInterface::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("RecievePacketDataReliable", "a_PacketData"), &NetworkInterface::RecievePacketDataReliable);
+	ClassDB::bind_method(D_METHOD("RecievePacketDataUnreliable", "a_PacketData"), &NetworkInterface::RecievePacketDataUnreliable);
+	ClassDB::bind_method(
+		D_METHOD("RecievePacketDataUnreliableOrdered", "a_PacketData"), &NetworkInterface::RecievePacketDataUnreliableOrdered);
 
 	// server
 	ADD_SIGNAL(MethodInfo("player_connected", PropertyInfo(Variant::INT, "peer_id")));
@@ -33,13 +49,10 @@ NetworkInterface::NetworkInterface() {}
 NetworkInterface::~NetworkInterface() {}
 
 void NetworkInterface::_ready() {
-	// TODO: unreliable
-	Dictionary config;
-	config["rpc_mode"] = MultiplayerAPI::RPC_MODE_ANY_PEER;
-	config["transfer_mode"] = MultiplayerPeer::TRANSFER_MODE_RELIABLE;
-	config["call_local"] = true;
-	config["channel"] = 0;
-	rpc_config("RecievePacketDataReliable", config);
+	RPC_CONFIG("RecievePacketDataReliable", MultiplayerAPI::RPC_MODE_ANY_PEER, MultiplayerPeer::TRANSFER_MODE_RELIABLE, true, 0);
+	RPC_CONFIG("RecievePacketDataUnreliable", MultiplayerAPI::RPC_MODE_ANY_PEER, MultiplayerPeer::TRANSFER_MODE_UNRELIABLE, true, 1);
+	RPC_CONFIG("RecievePacketDataUnreliableOrdered", MultiplayerAPI::RPC_MODE_ANY_PEER,
+		MultiplayerPeer::TRANSFER_MODE_UNRELIABLE_ORDERED, true, 2);
 
 	get_multiplayer()->connect("peer_connected", callable_mp(this, &NetworkInterface::OnPlayerConnected));
 	get_multiplayer()->connect("peer_disconnected", callable_mp(this, &NetworkInterface::OnPlayerDisconnected));
@@ -49,13 +62,13 @@ void NetworkInterface::_ready() {
 }
 
 void NetworkInterface::BroadcastPacket(const protocol::Packet& a_Packet) {
-	PackedByteArray byteArray = protocol::PacketSerializer::Serialize(a_Packet);
-	rpc("RecievePacketDataReliable", byteArray);
+	protocol::PacketBroadcaster packetBroadcaster(*this);
+	packetBroadcaster.BroadcastPacket(a_Packet);
 }
 
 void NetworkInterface::SendPacket(PeerID a_Peer, const protocol::Packet& a_Packet) {
-	PackedByteArray byteArray = protocol::PacketSerializer::Serialize(a_Packet);
-	rpc_id(a_Peer, "RecievePacketDataReliable", byteArray);
+	protocol::PacketSender packetSender(a_Peer, *this);
+	packetSender.SendPacket(a_Packet);
 }
 
 void NetworkInterface::RecievePacketDataReliable(godot::PackedByteArray a_PacketData) {
@@ -66,9 +79,27 @@ void NetworkInterface::RecievePacketDataReliable(godot::PackedByteArray a_Packet
 	}
 }
 
+void NetworkInterface::RecievePacketDataUnreliable(godot::PackedByteArray a_PacketData) {
+	// we have to copy the function body in order to preserve the remote sender id
+	auto packet = protocol::PacketSerializer::Deserialize(a_PacketData);
+	if (packet) {
+		packet->m_Sender = get_multiplayer()->get_remote_sender_id();
+		Dispatch(*packet);
+	}
+}
+
+void NetworkInterface::RecievePacketDataUnreliableOrdered(godot::PackedByteArray a_PacketData) {
+	// we have to copy the function body in order to preserve the remote sender id
+	auto packet = protocol::PacketSerializer::Deserialize(a_PacketData);
+	if (packet) {
+		packet->m_Sender = get_multiplayer()->get_remote_sender_id();
+		Dispatch(*packet);
+	}
+}
+
 Error NetworkInterface::JoinGame(const String& a_Address, uint16_t a_Port) {
 	auto* peer = memnew(ENetMultiplayerPeer);
-	Error error = peer->create_client(a_Address, a_Port);
+	Error error = peer->create_client(a_Address, a_Port, 3);
 	if (error) {
 		OnConnectFail();
 		return error;
@@ -80,7 +111,7 @@ Error NetworkInterface::JoinGame(const String& a_Address, uint16_t a_Port) {
 
 Error NetworkInterface::CreateGame(uint16_t a_Port, bool a_Dedicated) {
 	auto* peer = memnew(ENetMultiplayerPeer);
-	Error error = peer->create_server(a_Port);
+	Error error = peer->create_server(a_Port, 50, 3);
 	if (error)
 		return error;
 

src/blitz/protocol/ByteBuffer.cpp

@@ -5,6 +5,36 @@
 namespace blitz {
 namespace protocol {
 
+#define Operators(Type, GodotType)                                                                                                    \
+	ByteBuffer& ByteBuffer::operator>>(Type& a_Data) {                                                                                \
+		if (sizeof(a_Data) + m_ReadOffset > m_Buffer.size()) {                                                                        \
+			throw ReadError("Buffer is too small ! Can't read " #Type);                                                               \
+		}                                                                                                                             \
+		a_Data = m_Buffer.decode_##GodotType(m_ReadOffset);                                                                           \
+		m_ReadOffset += sizeof(a_Data);                                                                                               \
+		return *this;                                                                                                                 \
+	}                                                                                                                                 \
+                                                                                                                                      \
+	ByteBuffer& ByteBuffer::operator<<(Type a_Data) {                                                                                 \
+		m_Buffer.resize(m_Buffer.size() + sizeof(a_Data));                                                                            \
+		m_Buffer.encode_##GodotType(m_Buffer.size() - sizeof(a_Data), a_Data);                                                        \
+		return *this;                                                                                                                 \
+	}
+
+// Integers
+Operators(int8_t, s8);
+Operators(uint8_t, u8);
+Operators(int16_t, s16);
+Operators(uint16_t, u16);
+Operators(int32_t, s32);
+Operators(uint32_t, u32);
+Operators(int64_t, s64);
+Operators(uint64_t, u64);
+
+// Reals
+Operators(float, float);
+Operators(double, double);
+
 ByteBuffer& ByteBuffer::operator>>(PlayerInfo& a_Data) {
 	*this >> a_Data.m_PlayerId >> a_Data.m_PlayerName;
 	return *this;
@@ -27,9 +57,9 @@ ByteBuffer& ByteBuffer::operator>>(godot::Vector3& a_Data) {
 
 ByteBuffer& ByteBuffer::operator>>(godot::String& a_Data) {
 	int nullPos = m_Buffer.find(0, m_ReadOffset);
-	// TODO: error handling
 	if (nullPos < 0)
-		return *this;
+		throw ReadError("String does not have an and in buffer !");
+
 
 	godot::PackedByteArray stringBuffer = m_Buffer.slice(m_ReadOffset, nullPos);
 	a_Data = stringBuffer.get_string_from_utf8();

src/blitz/protocol/PacketSender.cpp

@@ -0,0 +1,39 @@
+#include <blitz/protocol/PacketSender.h>
+
+#include <blitz/godot/NetworkInterface.h>
+#include <blitz/protocol/PacketSerializer.h>
+
+namespace blitz {
+namespace protocol {
+
+///////////////////////
+/* PacketBroadcaster */
+///////////////////////
+
+#define DeclarePacket(PacketName, Reliability, ...)                                                                                   \
+	void PacketBroadcaster::Visit(const protocol::packets::PacketName& a_Packet) {                                                    \
+		m_NetworkInterface.rpc("RecievePacketData" #Reliability, protocol::PacketSerializer::Serialize(a_Packet));                    \
+	}
+
+DeclareAllPacket()
+
+#undef DeclarePacket
+
+
+
+
+
+//////////////////
+/* PacketSender */
+//////////////////
+#define DeclarePacket(PacketName, Reliability, ...)                                                                                   \
+	void PacketSender::Visit(const protocol::packets::PacketName& a_Packet) {                                                         \
+		m_NetworkInterface.rpc_id(m_PeerId, "RecievePacketData" #Reliability, protocol::PacketSerializer::Serialize(a_Packet));       \
+	}
+
+	DeclareAllPacket()
+
+#undef DeclarePacket
+
+}  // namespace protocol
+}  // namespace blitz

src/blitz/protocol/PacketSerializer.cpp

@@ -68,7 +68,8 @@ class Deserializer : public PacketVisitor {
 	bool Deserialize(const PacketPtr& a_Packet) {
 		try {
 			Check(*a_Packet.get());
-		} catch (std::exception& e) {
+		} catch (ByteBuffer::ReadError& e) {
+			godot::UtilityFunctions::printerr("[PacketSerializer::Deserializer] ", e.what());
 			return false;
 		}
 		return true;
@@ -109,6 +110,7 @@ std::unique_ptr<Packet> Deserialize(godot::PackedByteArray& a_Data) {
 	const PacketPtr& emptyPacket = PacketFactory::CreateReadOnlyPacket(packetType);
 
 	Deserializer deserializer(std::move(stream));
+
 	if (deserializer.Deserialize(emptyPacket)) {
 		PacketPtr packet = std::move(deserializer.GetPacket());
 		return packet;