[Bridge] Max length of bridge device name?

[Josh Wyatt]

Hi all,

Does anyone know the maximum length of the interface name created by 'brctl addbr'?  How about any other restrictions on 
usable alphanumerics, for example is "-" (dash) or "_" (underscore) allowed, commas, periods, etc allowed?

Most docs I see refer to this as br0, but I'd like to use more descriptive names, such as vlan_105, etc.

Thanks in advance,
Josh