NWProtocolWebSocket.CloseCode.Defined.mandatoryExtension
The WebSocket client expected the server to negotiate one or more extensions that were not negotiated.
Declaration
case mandatoryExtensionSee Also
Defined Close Codes
NWProtocolWebSocket.CloseCode.Defined.normalClosureNWProtocolWebSocket.CloseCode.Defined.goingAwayNWProtocolWebSocket.CloseCode.Defined.protocolErrorNWProtocolWebSocket.CloseCode.Defined.unsupportedDataNWProtocolWebSocket.CloseCode.Defined.noStatusReceivedNWProtocolWebSocket.CloseCode.Defined.abnormalClosureNWProtocolWebSocket.CloseCode.Defined.invalidFramePayloadDataNWProtocolWebSocket.CloseCode.Defined.policyViolationNWProtocolWebSocket.CloseCode.Defined.messageTooBigNWProtocolWebSocket.CloseCode.Defined.internalServerErrorNWProtocolWebSocket.CloseCode.Defined.tlsHandshake