# CFNetDiagnosticCopyNetworkStatusPassively(_:_:) Gets a network status value. ``` func CFNetDiagnosticCopyNetworkStatusPassively(_ details: CFNetDiagnostic, _ description: UnsafeMutablePointer?>?) -> CFNetDiagnosticStatus ``` ## Parameters `details` CFNetDiagnosticRef, created by [`CFNetDiagnosticCreateWithStreams(_:_:_:)`](/documentation/CFNetwork/CFNetDiagnosticCreateWithStreams(_:_:_:)) or [`CFNetDiagnosticCreateWithURL(_:_:)`](/documentation/CFNetwork/CFNetDiagnosticCreateWithURL(_:_:)), for which the Network Diagnostics status is to be obtained. `description` If not `NULL`, upon return contains a localized string containing a description of the current network status. Ownership follows the [The Create Rule](https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/Concepts/Ownership.html#//apple_ref/doc/uid/20001148-103029). ## Return Value A network status value. ## Discussion This function returns a status value that can be used to display basic information about the connection, and optionally gets a localized string containing a description of the current network status. This function is guaranteed not to generate network activity. ### Special Considerations This function is thread safe as long as another thread does not alter the same CFNetDiagnosticRef at the same time. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)