ControlChannelTriggerStatus ControlChannelTriggerStatus ControlChannelTriggerStatus Enum

Specifies if the system was able to complete configuration of a ControlChannelTrigger object for use by class elements in the Windows.Networking.Sockets and related namespaces.

Note

This enumeration is not supported on Windows Phone.

Syntax

Declaration

public enum ControlChannelTriggerStatuspublic enum ControlChannelTriggerStatusPublic Enum ControlChannelTriggerStatus

Remarks

The system maintains a policy on the number of ControlChannelTrigger instances that can be configured for a Windows Store app, to limit resource usage and extend battery life. Once configuration by the system is complete, each ControlChannelTrigger instance represents either a hardware or software slot for an established TCP connection that is to be maintained even when the app is suspended (moved from the foreground to the background).

A local computer system can be in several power states:

  • System active
  • Connected standby
  • Shutdown An app in the system active mode can receive a control channel trigger when either a software or hardware slot is used. An app in the connected standby mode can only receive a control channel trigger when a hardware slot is used.

Fields

HardwareSlotAllocated
HardwareSlotAllocated
HardwareSlotAllocated
HardwareSlotAllocated

A hardware slot was allocated by the system.

HardwareSlotRequested
HardwareSlotRequested
HardwareSlotRequested
HardwareSlotRequested

The policy check succeeded and a hardware slot has been requested from the system.

PolicyError
PolicyError
PolicyError
PolicyError

A policy error occurred when the system tried to complete configuration of a ControlChannelTrigger. This error can occur when an app has requested more connections for hardware or software slots than are permitted by system policy.

ServiceUnavailable
ServiceUnavailable
ServiceUnavailable
ServiceUnavailable

The service provided by the ControlChannelTrigger is unavailable. This can happen if the network connection broker service is not yet ready but the app is trying to establish a ControlChannelTrigger channel. This status code is provided under the following conditions:

  • When there is fast user switching and the new user is trying to establish the ControlChannelTrigger channel.
  • When the system is entering a low power mode (Connected standby mode) and the app is trying to create a software slot. Software slots are available only when the system is active and not in low power mode.

The mitigation in both these cases is to listen for System Event broker events and register the ControlChannelTrigger channel at that point.

SoftwareSlotAllocated
SoftwareSlotAllocated
SoftwareSlotAllocated
SoftwareSlotAllocated

The policy check succeeded and a software slot was allocated by the system.

SystemError
SystemError
SystemError
SystemError

A system error occurred when the system tried to complete configuration of a ControlChannelTrigger for a hardware slot.

TransportDisconnected
TransportDisconnected
TransportDisconnected
TransportDisconnected

The network transport associated with the ControlChannelTrigger was disconnected. The underlying TCP connection was already disconnected by a TCP reset received from the remote destination or a graceful disconnect by either the app or the remote destination. The most common occurrence is a TCP reset or a graceful disconnect sent by the remote destination.

Device family

Windows Desktop Extension SDK (introduced v10.0.10240.0)
Windows Mobile Extension SDK (introduced v10.0.10240.0)

API contract

Windows.Networking.Sockets.ControlChannelTriggerContract (introduced v1)

Attributes

Windows.Foundation.Metadata.WebHostHiddenAttribute
Windows.Foundation.Metadata.ContractVersionAttribute

Details

Assembly

Windows.Networking.Sockets.dll