24 Oct
2005
24 Oct
'05
3:40 p.m.
You use check_to and check_from.
As for From modification: Some UAs use From and To for matching messages in
the same dialog. These are primarily older ones and allthough the general
recommendation is "don't do it", I'm not sure how many of these there
are
out there now. Anyone?
UAC solves this by changing back and forth.
g-)
----- Original Message -----
From: "sip" <sip(a)arcdiv.com>
To: <serusers(a)lists.iptel.org>
Sent: Friday, October 21, 2005 03:43 PM
Subject: [Serusers] Avoiding caller ID spoofing....
I think I asked this question before, but I honestly
can't remember (been
one
of those weeks).
How can I avoid someone spoofing caller ID by just putting in fake info
into
their Display Name field in their UA client? I'd like to be able to
replace
the display name with one of my choosing (preferably based on some rules
about
the caller's ID... i.e. if the caller is a user on our system, replace
his/her
display name with the last name, first name from the DB subscriber info.
If
the caller is from a different system, remove the display name completely
and
just pass the sip info so that at least a valid identification is seen).
This involves the dreaded modification of the From: header (although it
shouldn't break RFC because it doesn't actually involve modifying the URI.
Is there a reasonable way to do this or does this call for some more
module
hacking (maybe taking bits from the UAC module and rewriting it to accept
an
avp or some such) ?
N.
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