QiXi/game_socket

Socket library for creating real-time multiplayer games. Based on TCP, with the ability to send messages over UDP (planned).

Game socket

The library was published in early access and is not stable, as it is being developed in parallel with other solutions. English is not a native language so there are no comments. At this stage, the library is for those who want to understand the source code and get a starting point for their solution or help me :)

Features

• One library contains both Server and Client parts.
• The API communication library is similar to Socket.io, but not compatible with this solution.
• Contains a built-in binary protocol so you don't have to work at the byte level.
• The transport layer uses TCP. To send game messages, it is planned to implement parallel work with UDP.
• It implements such concepts as Multiplexing - interaction with several spaces through a single channel.

Support for WebSocket is not planned for the current day (but everything can change with the support of the community)

Examples

Examples:

• example/client/main.dart
• example/server/main.dart

Protocol

The protocol is schematic based. This approach allows you to save the amount of data transferred, since the data type is not transferred with the message, and the length of the numbers is not serialized.

Data types used in the schema

Type	Size	Range
bool	1 bit	true or false
int8	1 byte	0 to 255
int16	2 bytes	0 to 65535
int32	4 bytes	0 to 4294967295
string	1 + value	0 to 255 chars
bytes	2 + value	0 to 65535 bytes

Data types when writing or reading messages

Operation	Schema Type	Dart Type	Range
putBool	bool	bool	true or false
putInt	int8	int	-128 to 127
putUInt	int8	int	0 to 255
putInt	int16	int	-32768 to 32767
putUInt	int16	int	0 to 65535
putInt	int32	int	-2147483648 to 2147483647
putUInt	int32	int	0 to 4294967295
putString	string	String	0 to 255 chars
putSingle	int8	double	0 to 1 step ~0.004
putRadians	int16	double	step ~0.0002
putPayload	bytes	Uint8List	0 to 65535 bytes

Plans

• Initialization for sending UPD diagrams.
• Automatic connections and reconnections.
• Expanding the possibilities for working with rooms.
• Conducting stress tests.

Tips for Beginners

• If you are developing a browser game, then you need a WebSocket solution.
• When designing a game for real-time communication, UDP should be preferred, since TCP will cause a delay in the event of packet loss.

Support

You can support the development of libraries for creating multiplatform games in Flutter:

History of creation

Sources that could have influenced the development of this work:

• https://jamesslocum.com/blog
• https://github.com/socketio/engine.io-server-java
• https://github.com/socketio/socket.io-server-java/
• https://github.com/Jerenaux/binary-protocol-example
• https://github.com/rikulo/socket.io-dart/

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If you can suggest a translation better than automatic ᕙ(☉̃ₒ☉‶)ว just do it