Up to date

This page is up to date for Godot 4.2. If you still find outdated information, please open an issue.

PacketPeerUDP

Inherits: PacketPeer < RefCounted < Object

UDP packet peer.

Description

UDP packet peer. Can be used to send raw UDP packets as well as Variants.

Note: When exporting to Android, make sure to enable the INTERNET permission in the Android export preset before exporting the project or using one-click deploy. Otherwise, network communication of any kind will be blocked by Android.

Methods

Error

bind ( int port, String bind_address="*", int recv_buf_size=65536 )

void

close ( )

Error

connect_to_host ( String host, int port )

int

get_local_port ( ) const

String

get_packet_ip ( ) const

int

get_packet_port ( ) const

bool

is_bound ( ) const

bool

is_socket_connected ( ) const

Error

join_multicast_group ( String multicast_address, String interface_name )

Error

leave_multicast_group ( String multicast_address, String interface_name )

void

set_broadcast_enabled ( bool enabled )

Error

set_dest_address ( String host, int port )

Error

wait ( )


Method Descriptions

Error bind ( int port, String bind_address="*", int recv_buf_size=65536 )

Binds this PacketPeerUDP to the specified port and bind_address with a buffer size recv_buf_size, allowing it to receive incoming packets.

If bind_address is set to "*" (default), the peer will be bound on all available addresses (both IPv4 and IPv6).

If bind_address is set to "0.0.0.0" (for IPv4) or "::" (for IPv6), the peer will be bound to all available addresses matching that IP type.

If bind_address is set to any valid address (e.g. "192.168.1.101", "::1", etc), the peer will only be bound to the interface with that addresses (or fail if no interface with the given address exists).


void close ( )

Closes the PacketPeerUDP's underlying UDP socket.


Error connect_to_host ( String host, int port )

Calling this method connects this UDP peer to the given host/port pair. UDP is in reality connectionless, so this option only means that incoming packets from different addresses are automatically discarded, and that outgoing packets are always sent to the connected address (future calls to set_dest_address are not allowed). This method does not send any data to the remote peer, to do that, use PacketPeer.put_var or PacketPeer.put_packet as usual. See also UDPServer.

Note: Connecting to the remote peer does not help to protect from malicious attacks like IP spoofing, etc. Think about using an encryption technique like TLS or DTLS if you feel like your application is transferring sensitive information.


int get_local_port ( ) const

Returns the local port to which this peer is bound.


String get_packet_ip ( ) const

Returns the IP of the remote peer that sent the last packet(that was received with PacketPeer.get_packet or PacketPeer.get_var).


int get_packet_port ( ) const

Returns the port of the remote peer that sent the last packet(that was received with PacketPeer.get_packet or PacketPeer.get_var).