[avahi] Mono apps don't get notified of ClientState.Running

Celso Pinto cpinto at yimports.com
Sun Apr 30 19:58:16 PDT 2006

Hi everyone,

I'm programming an application that uses Avahi's Mono bindings and I 
think I found an ugly problem: when a Mono app creates an instance of 
Avahi.Client, the constructor of this class invokes the native 
avahi_client_new method, which receives a parameter for the client_state 

While still in construction, the Avahi.Client class gets notified that 
the ClientState is now Running, so the Client.OnClientCallback method is 
invoked but the StateChanged event still doesn't contain any Handlers 
because this is all happening during construction of the Avahi.Client 

This means that applications, like my own, that are waiting on the 
StateChanged event with a ClientState.Running value to start publishing 
their services never get notified, therefore never get to publish anything.

The only way to fix this problem is to create a Client.Connect() method. 
This allows us to first create an instance of Avahi.Client, then add a 
delegate to the StateChanged event and finally call the 
Avahi.Client.Connect() method. Only then our callbacks get notified of 
the running state.

The big question is: because this will break the current behaviour of 
the Avahi.Client class (meaning that the client connects to the daemon 
during construction), will you guys make the necessary changes?


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