package signaling

Get desktop application:
View/edit binary Protocol Buffers messages

A serialized one these goes in the "opaque" field of the CallingMessage::Offer in SignalService.proto

• optional ConnectionParametersV4 v4 = 4

A generic calling message that is opaque to the application but interpreted by RingRTC. A serialized one of these goes into the "Opaque" field in the CallingMessage variant in Signal protocol messages.

• optional group_call.DeviceToDevice group_call_message = 1

• optional CallMessage.RingIntention ring_intention = 2

• optional CallMessage.RingResponse ring_response = 3

Used in: CallMessage

• optional bytes group_id = 1

• optional RingIntention.Type type = 2

• optional sfixed64 ring_id = 3

  This is signed so it fits in a SQLite integer column.

Used in: RingIntention

• RING = 0

• CANCELLED = 1

Used in: CallMessage

• optional bytes group_id = 1

• optional RingResponse.Type type = 2

• optional sfixed64 ring_id = 3

  This is signed so it fits in a SQLite integer column.

Used in: RingResponse

• RINGING = 0

• ACCEPTED = 1

• DECLINED = 2

• BUSY = 3

Used in: Answer, Offer

• optional bytes public_key = 1

• optional string ice_ufrag = 2

• optional string ice_pwd = 3

• repeated VideoCodec receive_video_codecs = 4

  In other words, the video codecs the sender can receive.

• optional uint64 max_bitrate_bps = 5

  Used at call establishment to convey the bitrate that the signaling sender (media receiver) wants the signaling receiver (media sender) to send.

A serialized one these goes in the "opaque" field of the CallingMessage::Ice in SignalService.proto Unlike other message types, the ICE message contains many of these, not just one. We should perhaps rename this to "IceUpdate" since it can either be a candidate or a removal of a candidate. But it would require a lot of FFI code to be renamed which doesn't seem worth it at the moment.

• optional IceCandidateV3 added_V3 = 2

  Use a field value of 2 for compatibility since both V2 and V3 have the same format.

• optional SocketAddr removed = 3

  ICE candidate removal identifies the removed candidate by (transport_name, component, ip, port, udp/tcp). But we assume transport_name = "audio", component = 1, and udp So we just need (ip, port)

Used in: IceCandidate

• optional string sdp = 1

A serialized one these goes in the "opaque" field of the CallingMessage::Offer in SignalService.proto For future compatibility, we can add new slots (v5, v6, ...)

• optional ConnectionParametersV4 v4 = 4

Used in: IceCandidate

• optional bytes ip = 1

  IPv4: 4 bytes; IPv6: 16 bytes

• optional uint32 port = 2

Used in: ConnectionParametersV4

• optional VideoCodecType type = 1

Used in: VideoCodec

• VP8 = 8

• VP9 = 9

• H264_CONSTRAINED_BASELINE = 40

  Keep these H264 definitions for better logging.

• H264_CONSTRAINED_HIGH = 46