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Message: 4
Date: Tue, 6 Mar 2012 20:05:32 -0600
From: Krishna Kurapati <kkurapat@gmail.com>
Subject: [SR-Users] Improving Kamailo configuration parser ...
To: kamailio users <sr-users@lists.sip-router.org>
Message-ID:
       <CAOzCjAfcaRQ+HT3r+mwckPyaVJH+EVFWNa_Hj6tAhGyD2DaMJA@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

I used

if ($var(x) != null) { ... }

in one of the routes, and tried to run Kamailio server.
The server exited with an error. I did not know why.

Once I changed it to if ($var(x) != $null) {} the error went away.
I missed $ infront null. I think it is hard to trace such problems once a
large chunk
of logic is written since many of us come from C++ and scripting background
where $null
is not a common practice.

Also if I tried to use if (!$var(x)) { ... } Kamailio tries to convert the
value of $var(x) to integer.
prints WARNINGS in the log when the $var(x) consists of a string.

Krish Kura
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