func validateState()

in Sources/NIOWebSocket/WebSocketFrameDecoder.swift [188:208]

• 18 lines of code
• 8 McCabe index (conditional complexity)

    func validateState(maxFrameSize: Int) throws {
        switch self.state {
        case .waitingForMask(let firstByte, let length), .waitingForData(let firstByte, let length, _):
            if length > maxFrameSize {
                throw NIOWebSocketError.invalidFrameLength
            }

            let isControlFrame = (firstByte & 0x08) != 0
            let isFragment = (firstByte & 0x80) == 0

            if isControlFrame && isFragment {
                throw NIOWebSocketError.fragmentedControlFrame
            }
            if isControlFrame && length > 125 {
                throw NIOWebSocketError.multiByteControlFrameLength
            }
        case .idle, .firstByteReceived, .waitingForLengthWord, .waitingForLengthQWord:
            // No validation necessary in this state as we have no length to validate.
            break
        }
    }