Lock locks the mutex

Unlock unlocks the mutex

Interface returns the interface of the link

Print all messages except trace.

topic returns a fully qualified topic string using baseTopic.

Close disconnects from the MQTT broker gracefully and stops background goroutines.

removeDiscovery removes a single HA discovery entity by publishing an empty retained payload.

RUnlock unlocks the mutex for reading

RLock locks the mutex for reading

runShellLog runs a shell command (for pipelines) and logs its output.

Close cleans up resources used by the USB gadget

Done decrements the wait group counter

readFileLog reads a file and logs its content.

Add adds a function to the wait group

Attrs returns the attributes of the link

Marshal marshals the message to a byte array.

publish marshals the payload to JSON and publishes to the topic.

Run a command on the remote host (the machine whose display is captured by the KVM).

IsConnected returns the current connection state.

Printf prints a log message as-is via predefined Printfer

Wait waits for the wait group to finish

FetchPublicKey fetches the public key from keyservers with fallback support. It tries each keyserver in order and returns on first success. The key is

Check if the agent is running.

* Wait for JetKVM input devices to have specific types registered. * Useful for verifying USB preset changes (e.g., keyboard_only removes mouse dev

* Retry keyboard round-trip (send Space, verify host received it) until success * or timeout. Used after USB rebinds where the HID channel needs time

actionsAllowed checks if MQTT actions are enabled in the config.

GetUsbState returns the current state of the USB gadget

downloadComponentSignature checks if a signature is required and downloads it if available. Returns the signature bytes (nil if not required/available

* Verify a key was pressed on the remote host. * Clears events, calls `action`, then checks for the expected Linux key code.

generateTestArmoredKey creates a valid armored PGP public key for testing.