Quick relay interface and transport selection

A non-transitory computer-readable storage medium storing instructions that, when executed by a processor included in an initiating communication device, cause a communication session with a recipient communication device to be established via a relay server, by carrying out one or more operations that comprise:

• establishing the communication session with the recipient communication device via the relay server,
• wherein establishing the communication session involves transport and interface selection for a first link between the initiating communication device and the relay server, and transport and interface selection for a second link between the relay server and the recipient communication device, and
• wherein:
• the first transport for the first link and the second transport for the second link are selected based on preferred types of transports, and
• the preferred types of transports comprise a first preferred type of transport that is used as the first transport if a first response is received by the interface circuit from the relay server using the first preferred type of transport, and a second preferred type of transport that is used as the second transport if a second response is received by the recipient communication device from the relay server using the second preferred type of transport;
• dynamically detecting changes to one or more interfaces in the communication session;
• and
• modifying at least one of the first link and the second link based on the detected changes.

A method for establishing a communication session with a recipient communication device via a relay server, comprising:

• by an initiating communication device:
• establishing the communication session with the recipient communication device via the relay server,
• wherein establishing the communication session involves transport and interface selection for a first link with the relay server, and transport and interface selection for a second link between the relay server and the recipient communication device, and
• wherein:
• the first transport for the first link and the second transport for the second link are selected based on preferred types of transports, and
• the preferred types of transports comprise a first preferred type of transport that is used as the first transport if a first response is received by the interface circuit from the relay server using the first preferred type of transport, and a second preferred type of transport that is used as the second transport if a second response is received by the recipient communication device from the relay server using the second preferred type of transport;
• and
• wherein the first transport and a first interface for the first link are selected independently of a second transport and a second interface for the second link.