Inherits: Reference < Object

Inherited By: NetworkedMultiplayerPeer, PacketPeerDTLS, PacketPeerGDNative, PacketPeerStream, PacketPeerUDP, WebRTCDataChannel, WebSocketPeer

Abstraction and base class for packet-based protocols.


PacketPeer is an abstraction and base class for packet-based protocols (such as UDP). It provides an API for sending and receiving packets both as raw data or variables. This makes it easy to transfer data over a protocol, without having to encode data as low-level bytes or having to worry about network ordering.


int encode_buffer_max_size 8388608


int get_available_packet_count ( ) const
PackedByteArray get_packet ( )
Error get_packet_error ( ) const
Variant get_var ( bool allow_objects=false )
Error put_packet ( PackedByteArray buffer )
Error put_var ( Variant var, bool full_objects=false )

Property Descriptions

  • int encode_buffer_max_size
Default 8388608
Setter set_encode_buffer_max_size(value)
Getter get_encode_buffer_max_size()

Maximum buffer size allowed when encoding Variants. Raise this value to support heavier memory allocations.

The put_var method allocates memory on the stack, and the buffer used will grow automatically to the closest power of two to match the size of the Variant. If the Variant is bigger than encode_buffer_max_size, the method will error out with @GlobalScope.ERR_OUT_OF_MEMORY.

Method Descriptions

  • int get_available_packet_count ( ) const

Returns the number of packets currently available in the ring-buffer.

Gets a raw packet.

  • Error get_packet_error ( ) const

Returns the error state of the last packet received (via get_packet and get_var).

Gets a Variant. If allow_objects is true, decoding objects is allowed.

Warning: Deserialized objects can contain code which gets executed. Do not use this option if the serialized object comes from untrusted sources to avoid potential security threats such as remote code execution.

Sends a raw packet.

Sends a Variant as a packet. If full_objects is true, encoding objects is allowed (and can potentially include code).