[Freeswitch-users] Hook on SIP CANCEL

[Oleg Stolyar]

Hi guys,

I am using the api_hangup_hook variable to let my internal system know when
a call is terminated.

Every now and then  my calling party cancels the SIP Invite before my dial
plan is finished.  IN this case FreeSWITCH properly responds with a "487
Request Terminated"

However, this does not fire the command assigned to the api_hangup_hook
variable.  This is probably also proper since the call has not yet been
established.

My question is whether there is a place somewhere where I can hook into the
processing of the CANCEL SIP message.

Thank you
Oleg
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