| Class | IdentError | Can't determine connection owner; reason unknown. | 
    
    
    | Class | NoUser | The connection specified by the port pair is not currently in use or 
currently not owned by an identifiable entity. | 
    
    
    | Class | InvalidPort | No summary | 
    
    
    | Class | HiddenUser | The server was able to identify the user of this port, but the 
information was not returned at the request of the user. | 
    
    
    | Class | IdentServer | No summary | 
    
    
    | Class | ProcServerMixin | Implements lookup() to grab entries for responses from /proc/net/tcp | 
    
    
    | Class | IdentClient | No class docstring; 1/5 methods documented |