[Help-gnu-radius] Different reply attributes based upon an username

[Michael Samanov]

Hi!

Is it possible to rewrite some attributes of the input packet so that the
new attributes would be added to the reply?

For example:

NAS packet:
User-Name = "test&callback"
...

Here the rewrite function does something so that radius sees
User-Name = "test"
Orig-User-Name = "test&callback"
Orig-Callback = "callback"

and it replies:

Service-Type = Framed-User
Cisco-AVPair = "lcp:callback-dialstring="


Here's the function itself:

integer
check_callback()
{
        integer i;

        if ((i = index(%[User-Name], '&')) != -1) {
                %[Orig-User-Name] = %[User-Name];
                %[Orig-Callback] = substr(%[User-Name], i+1, -1);
                %[User-Name] = substr(%[User-Name], 0, i);
        }
        return 0;
}

but we have no working idea how to explain to radius so that it would send
Cisco-AVPair = "lcp:callback-dialstring=" when and only when username is
like "xxx&callback"

Now we are doing with "hints", "users", "huntgroups" - with or without
Suffix && Strip-User-Name, but the best we could achieve was the attribute
needed in the logs, not in the reply