Greetings,
I have a Contact URI with params as in the following form returned to
me in a 302 Moved Temporarily reply:
<sip:a=foo;b;c=bar>
I am able to check the existence of parameters 'a' and 'b', which have
values assigned to them, in the following way:
failure_route[...] {
...
$var(dest) = $T_rpl($ct);
$var(dest) = $(var(dest){nameaddr.uri});
$var(dest) = $(var(dest){uri.user});
...
if(! $(var(dest){param.value,a})) {
....
}
...
}
However, what I cannot seem to figure out is a reliable test condition
for the existence of a parameter like 'b', which does not have a
value. I have tried:
if(! $(var(dest){param.value,b}))
which clearly cannot work as the parameter has no _value_.
Also have tried:
if(!defined $(var(dest){param.value,b}))
and also tests of strempty(), !defined, etc. for
$var(dest){uri.param,b}) (prior to extraction of param list using
{uri.user} above).
Ideas appreciated, thanks!
--
Alex Balashov - Principal
Evariste Systems LLC
1170 Peachtree Street
12th Floor, Suite 1200
Atlanta, GA 30309
Tel: +1-678-954-0670
Fax: +1-404-961-1892
Web: http://www.evaristesys.com/
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