I want to write a routing filter which makes its decision based on
information about (primarily) the authentication state of a print job. Did
we receive it from a host we trust? From a reserved port? Is some sort of
"strong" authentication involved in the job submission (ie Kerberos)?
It seems that much of this information might be useful for any
filter (although I don't have a concrete example at the moment). A filters
environment gets initialized via the following:
Filter_file() --> Make_passthrough() --> Setup_env_for_process()
So if this information is to be made available to all filters, it
ought to be done in one of those places. My current thinking is in
Setup_env_for_process(). I am not overly familiar with the philosophy
behind the LPRng architecture, however one way I can see to accomplish my
goal is just to add Find_str_value()/Set_str_value() pairs.
I'd like such functionality to become a standard part of the LPRng
filter mechanism. To that end, if there is a more general way to get the
information I want, I'm willing to do a little more work to implement
it. If anybody (Patrick?) has a suggestion/comment, I'm interested in some
feedback.
I'm aware of the lpd.perms mechanism, but it is not useful for
redirecting a job. It may or may not be appropriate to try to extend the
permissions checking code.
/* Sam */
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