[Bug-gnu-radius] Radiusd will try to open UDP listen, even without auth{} or acct{} block

[Maurice Makaay]

Hi,

I am trying to build an accounting-only gnu-radius server. For doing so,
I created a configuration file without an "auth{ ... }" block in it.
This should work, but I see that the radiusd will on startup try to
open the default UDP radius authentication port. This is a bug, because
it might cause trouble on systems where people are running two separate
radiusservers for authentication and accounting. 

Imagine: 
server 1 starts with only an acct block in the configuration, but alongside 
listening on the accounting UDP port, it'll also start listening on the 
authentication UDP port.
server 2 starts with only an authentication block in the configuration.
Binding the auth port will fail, because server 1 already did so.
Result: broken radius service.

Workaround:
Always create an auth{} and an acct{} block in the configuration and if
one of them is not used, assign a bogus port using the listen statement.

Solution:
I think the attached patch will fix this.


Regards,

-- Maurice Makaay

patch.config.udp.listen
Description: Text document