Unity Signaler component

The Signaler Unity component is an abstract base class used as an helper for implementing a custom component for a given signaling solution. It is not strictly required, but provides some utilities which make it easier to write an implementation.

Property	Description
PeerConnection	A reference to the PeerConnection Unity component that this signaler should provide signaling for.

Implementing a custom signaler

A custom signaling solution can derive from the abstract base Signaler class for simplicity, or be any other Unity component or C# class.

When deriving from the Signaler class, a derived class needs to:

• Implement the SendMessageAsync(SdpMessage) and SendMessageAsync(IceCandidate) abstract methods to send messages to the remote peer via the custom signaling solution.
• Handle incoming messages from the remote peer:
  • call HandleConnectionMessageAsync(SdpMessage) on the Unity peer connection component when receiving an SDP offer or answer message.
  • call AddIceCandidate(IceCandidate) on the underlying C# peer connection object to deliver ICE candidates to the local peer implementation.

When implementing a custom signaling solution from scratch without using the Signaler class, the custom implementation must, in addition of the above message handling, replace the work done by SendMessageAsync():

• Listen to the LocalSdpReadytoSend and IceCandidateReadytoSend events.
• Send to the remote peer, by whatever mean devised by the implementation, some messages containing the data of those events, such that the remote peer can handle them as described above.