[Mimedefang] Accessing the source/destination port #'s at filter_relay
dmo at roaringpenguin.com
Tue May 4 14:43:36 EDT 2010
On Tue, May 04, 2010 at 11:25:16AM -0700, - wrote:
> The milter interface docs tells us that the needed variables are
> available at the filter_helo() stage (if such is enabled).
Sure, but the way MIMEDefang passes those macros down to the Perl code
is by writing lines like:
to the COMMANDS file.
The problem and we don't have a COMMANDS file until after MAIL FROM,
because we wait until Sendmail gives us a queue ID so that we can use
that ID in the directory name.
One option we were kicking around is using a different identifier for
the directory name. We're already generating a unique per-message
identifier (gen_mx_id(), which gives us $MIMEDefangID via an 'i' line in
COMMANDS) so all that would need to be done is:
- generate that identifier earlier
- create /var/spool/MIMEDefang/mdefang-XXXXXXXX using the mxid
value instead of the queue ID value
- create the COMMANDS file earlier
- additional overhead created by generating these directories
earlier on (not sure how significant this would be)
- confusion or breakage of external scripts that relied on
mdefang- directories containing the Sendmail queue ID in their
name. This could be mitigated by auto-generating symlinks
once we do have a queue ID
- filter_helo() can stop being a second-class citizen, as it
would have a COMMANDS file
Dave O'Neill <dmo at roaringpenguin.com> Roaring Penguin Software Inc.
+1 (613) 231-6599 http://www.roaringpenguin.com/
For CanIt technical support, please mail: support at roaringpenguin.com
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