[asterisk-dev] SIP channel/owner question

[Klaus Darilion]

Hi!

In SIP channel I have an struct ast_channel *ast. So, what is the 
difference between:

ast->hangupcause
and
ast->tech_pvt->owner->hangupcause


I am trying to understand why the X-Asterisk-HangupCause is not added 
for all [4-6]xx responses to incoming INVITEs.

thanks
klaus