### Monitor Network Interface Changes

Source: https://github.com/wadetregaskis/networkinterfaceinfo/blob/main/README.md

This example shows how to monitor for additions, modifications, and removals of network interfaces. This functionality is available on Apple platforms and requires importing both NetworkInterfaceInfo and NetworkInterfaceChangeMonitoring. Be aware that Network.NWPathMonitor may have delays in detecting changes.

```swift
import NetworkInterfaceInfo
import NetworkInterfaceChangeMonitoring

for try await change in NetworkInterface.changes() {
    switch change.nature {
    case .added:
        print("New network interface: \(change.interface)")
    case .modified(let modificationNature):
        if modificationNature.contains(.address) {
            print("Address changed to \(change.interface.address).")
        }
    case .removed:
        // etc
    }
}
```

--------------------------------

### Filter Active IPv4 Network Interfaces

Source: https://github.com/wadetregaskis/networkinterfaceinfo/blob/main/README.md

This snippet demonstrates how to retrieve all active IPv4 network interfaces, excluding loopback interfaces. Ensure you have imported the NetworkInterfaceInfo library.

```swift
import NetworkInterfaceInfo

try NetworkInterface.all
    .filter { $0.up             // Only active network interfaces…
              && !$0.loopback } // Ignoring loopback interfaces…
    .compactMap(\.address)      // That have addresses and…
    .filter(\.isIPv4)           // Use IPv4.
```

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