WebRTCPeerConnection¶

Inherited By: WebRTCPeerConnectionExtension

Interface to a WebRTC peer connection.

Description¶

A WebRTC connection between the local computer and a remote peer. Provides an interface to connect, maintain and monitor the connection.

Setting up a WebRTC connection between two peers may not seem a trivial task, but it can be broken down into 3 main steps:

The peer that wants to initiate the connection (A from now on) creates an offer and send it to the other peer (B from now on).
B receives the offer, generate and answer, and sends it to A).
A and B then generates and exchange ICE candidates with each other.

After these steps, the connection should become connected. Keep on reading or look into the tutorial for more information.

Methods¶

Error	add_ice_candidate ( String media, int index, String name )
void	close ( )
WebRTCDataChannel	create_data_channel ( String label, Dictionary options={} )
Error	create_offer ( )
ConnectionState	get_connection_state ( ) const
GatheringState	get_gathering_state ( ) const
SignalingState	get_signaling_state ( ) const
Error	initialize ( Dictionary configuration={} )
Error	poll ( )
void	set_default_extension ( StringName extension_class ) static
Error	set_local_description ( String type, String sdp )
Error	set_remote_description ( String type, String sdp )

Signals¶

data_channel_received ( WebRTCDataChannel channel )

Emitted when a new in-band channel is received, i.e. when the channel was created with negotiated: false (default).

The object will be an instance of WebRTCDataChannel. You must keep a reference of it or it will be closed automatically. See create_data_channel.

ice_candidate_created ( String media, int index, String name )

Emitted when a new ICE candidate has been created. The three parameters are meant to be passed to the remote peer over the signaling server.

session_description_created ( String type, String sdp )

Emitted after a successful call to create_offer or set_remote_description (when it generates an answer). The parameters are meant to be passed to set_local_description on this object, and sent to the remote peer over the signaling server.

Enumerations¶

enum ConnectionState:

ConnectionState STATE_NEW = 0

The connection is new, data channels and an offer can be created in this state.

ConnectionState STATE_CONNECTING = 1

The peer is connecting, ICE is in progress, none of the transports has failed.

ConnectionState STATE_CONNECTED = 2

The peer is connected, all ICE transports are connected.

ConnectionState STATE_DISCONNECTED = 3

At least one ICE transport is disconnected.

ConnectionState STATE_FAILED = 4

One or more of the ICE transports failed.

ConnectionState STATE_CLOSED = 5

The peer connection is closed (after calling close for example).

enum GatheringState:

GatheringState GATHERING_STATE_NEW = 0

The peer connection was just created and hasn't done any networking yet.

GatheringState GATHERING_STATE_GATHERING = 1

The ICE agent is in the process of gathering candidates for the connection.

GatheringState GATHERING_STATE_COMPLETE = 2

The ICE agent has finished gathering candidates. If something happens that requires collecting new candidates, such as a new interface being added or the addition of a new ICE server, the state will revert to gathering to gather those candidates.

enum SignalingState:

SignalingState SIGNALING_STATE_STABLE = 0

There is no ongoing exchange of offer and answer underway. This may mean that the WebRTCPeerConnection is new (STATE_NEW) or that negotiation is complete and a connection has been established (