[reSIProcate] difficulties with re-invite

[Richard Stellingwerff]

Hi,

After succesfully establishing a connection between two SIP phones, I
receive a bunch of re-INVITE requests. I'd like to ignore these, but
when I ignore it, reject it, or provideAnswer() it, I'm getting weird
issues. If I ignore it, I  never get notified when the remote party
hangs up. And when I provideAnswer(), I heard a weird buzzing noise,
which doesn't stop until I hangup.

All the examples I've seen simply do provideAnswer() and accept(), but
accept() only works if the state isn't Connected. My question is, how
do I properly handle those re-invites (onOffer()'s when the call is
already in progress)?

Kind regards,
Richard Stellingwerff.