const (
	DefaultStreamCreationTimeout = 30 * time.Second

	// The SPDY subprotocol "channel.k8s.io" is used for remote command
	// attachment/execution. This represents the initial unversioned subprotocol,
	// which has the known bugs https://issues.k8s.io/13394 and
	// https://issues.k8s.io/13395.
	StreamProtocolV1Name = "channel.k8s.io"

	// The SPDY subprotocol "v2.channel.k8s.io" is used for remote command
	// attachment/execution. It is the second version of the subprotocol and
	// resolves the issues present in the first version.
	StreamProtocolV2Name = "v2.channel.k8s.io"

	// The SPDY subprotocol "v3.channel.k8s.io" is used for remote command
	// attachment/execution. It is the third version of the subprotocol and
	// adds support for resizing container terminals.
	StreamProtocolV3Name = "v3.channel.k8s.io"

	// The SPDY subprotocol "v4.channel.k8s.io" is used for remote command
	// attachment/execution. It is the 4th version of the subprotocol and
	// adds support for exit codes.
	StreamProtocolV4Name = "v4.channel.k8s.io"

	// The subprotocol "v5.channel.k8s.io" is used for remote command
	// attachment/execution. It is the 5th version of the subprotocol and
	// adds support for a CLOSE signal.
	StreamProtocolV5Name = "v5.channel.k8s.io"

	NonZeroExitCodeReason = metav1.StatusReason("NonZeroExitCode")
	ExitCodeCauseType     = metav1.CauseType("ExitCode")

	// RemoteCommand stream identifiers. The first three identifiers (for STDIN,
	// STDOUT, STDERR) are the same as their file descriptors.
	StreamStdIn  = 0
	StreamStdOut = 1
	StreamStdErr = 2
	StreamErr    = 3
	StreamResize = 4
	StreamClose  = 255
)

var SupportedStreamingProtocols = []string{StreamProtocolV4Name, StreamProtocolV3Name, StreamProtocolV2Name, StreamProtocolV1Name}