Translating nty#: to internet address - How?

[Don Libes]

Does anyone know how to get the internet address of a particular
nty?  There is a way, since finger reports the host that a user is
rlogin'd from.  I don't have the source to finger, however, and TWG
is incredibly slow about helping with these kinds of requests.

Please don't tell me about utmp and lastlog.  This is not how it
works under Eunice.  I suspect the solution requires mucking about
through the ddb and ucb structures.  I am quite willing to do
this, but we don't even have anything like <nty.h> so I don't know
where to start.

Don Libes    {seismo,umcp-cs}!nbs-amrf!libes