Hi,
The '!' symbol has the same meaning as in any other programming
language, to negate the return code of the function.
So if you look at the return code of the mf_process_maxfwd_header at
[1], you will see it returns a positive return code when the processing
of the Max-Forward header succeeds, and a negative return code if the
Max-Forward value is 0 or if there was another failure.
[1] http://www.opensips.org/html/docs/modules/1.7.x/maxfwd.html#id249099
Regards,
Vlad Paiu
OpenSIPS Developer
On 01/25/2012 02:44 PM, Faisal Rehman wrote:
Hi Everybody,
I have a very tiny & crazy question but it is confusing me & I
couldn't find its accurate answer over google that why we use "!"this
before mf_process_maxfwd_header function in the main routing block. I
have also seen this symbol with other functions
like!is_method("REGISTER|MESSAGE") so what's its soul purpose?
How can I test the functionality of just the
mf_process_maxfwd_headerfunction?
Regards,
Faisal Rehman
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