otPlatDnssdRegisterCallback

Represents the callback function used when registering/unregistering a host or service. See `otPlatDnssdRegisterService()`, `otPlatDnssdUnregisterService()`, `otPlatDnssdRegisterHost()`, and `otPlatDnssdUnregisterHost()` for more details about when to invoke the callback and the `aError` values that can be returned in each case.