[SA-exim] Config question

[Brian Lavender]

This is the sample config and comments on my system. What exactly does the {::1}
mean?

Is this some sort of LISP or M4 syntax? Sorry, I am not too familiar
with LISP yet.

Thanks,

brian

# Exim configuration string to run before running SA against the message
# This decides whether SA gets run against the message or not. This
# default will not reject messages if the message had SA headers but
# they weren't added by us.

SAEximRunCond: ${if and {{def:sender_host_address} {!eq {$sender_host_address}{127.0.0.1}} {!eq {$sender_host_address}{::1}}}}

[Magnus Holmgren]

Post by Brian Lavender
This is the sample config and comments on my system. What exactly does the
{::1} mean?
Is this some sort of LISP or M4 syntax? Sorry, I am not too familiar
with LISP yet.

It's (part of the) Exim string expansion syntax. See http://www.exim.org/exim-
html-current/doc/html/spec_html/ch11.html. The language is functional, like
Lisp, but that's where the similarities end. What you have below is an ${if }
item with a composite condition ("and { }"). The "and" condition takes any
number of subconditions, each enclosed in braces. The "eq" condition takes two
operands, also enclosed in braces, whereas the "def" condition takes just one
after a colon but with no braces. So {::1} is just an IPv6 address enclosed in
braces to separate it from the other operand, $sender_host_address.

Post by Brian Lavender
SAEximRunCond: ${if and {{def:sender_host_address} {!eq
{$sender_host_address}{127.0.0.1}} {!eq {$sender_host_address}{::1}}}}

[Marc MERLIN]

Post by Brian Lavender
This is the sample config and comments on my system. What exactly does the {::1}
mean?

It's localhost in IPv6 notation.

Marc

Post by Brian Lavender
Is this some sort of LISP or M4 syntax? Sorry, I am not too familiar
with LISP yet.
Thanks,
brian
# Exim configuration string to run before running SA against the message
# This decides whether SA gets run against the message or not. This
# default will not reject messages if the message had SA headers but
# they weren't added by us.
SAEximRunCond: ${if and {{def:sender_host_address} {!eq {$sender_host_address}{127.0.0.1}} {!eq {$sender_host_address}{::1}}}}
--
Brian Lavender
http://www.brie.com/brian/
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