Ping-Pong

Simple multiplayer game.

Servers discovery protocol

• Client: When want to discover servers sends DISCOVER message.
• Servers: Reply with OFFER <TCP-PORT> <SERVER-NICK> to every DISCOVER message.

Waiting in queue protocol

• Client: Client is joining to queue by simply connecting to TCP port.
• Server: Sends POSITION <NEW-POSITION> messages when position in queue is changing.

Invitation protocol

• Server: When client is first in the queue server sends INVITE message.
• Client: Sends his nick.
• Server: Validates nick and reply with NICK VALID or NICK INVALID and disconnects.

Gameplay server protocol

Server sends periodically binary messages with undermentioned fields.

• Server Y coordinate
• Ball X coordinate
• Ball Y Coordinate
• Client points count
• Server points count
• Game status (0 - pending, 1 - won, 2 - lost)

Gameplay client protocol

Client sends periodically his Y coordinate in binary messages.

Galery

Initial screens

Server waiting and discovery screens

Game screens