Re: [Iaxclient-devel] Re: Bug info... (really weird bug info)

[Adam H. <ad...@te...>]

> More Data:
>
> Watching the trace, the error seems to take place after the timeout for
the
> transfer attempt.  As Adam pointed out, IAX2 always tries to establish a
> native bridge.  Somehow our clients, being both NATed behind the same NAT
> device (i.e. both using the same real outside IP address) are unable to
> connect natively (the NAT router is not smart enough to "pinwheel" IAX
> packets?) so the connection does not work.

I've been meaning to talk to Mark about this. I want to add something to IAX
to allow two people behind the same nat to talk to each other (many NAT
routers can't do "pinwheel")

>
> Oddly, the IAX protocol seems to default to switching over to a
> native-bridged operation UNLESS it receives tacit failure messages from
both
> sides.
>

Neg, it's actually when it receives a confirmation from both sides. So in
your situation where both parties can't talk to each other, it should remain
communicating through the server.

> Can we set a noreinvite flag for IAX (I know, I should look at the
> source...) to prevent the system from event trying to reinvite the audio
> point-to-point?
>
> I want to blame the "both clients behind the same NAT screen" factor, but
I
> have had client-to-client calls loose audio after 1 minute even when users
> are calling in from outside.

I think you're answered why before, from one of your emails

>Question: If the client ultimately sends a transfer reject message back to
>Asterisk, why would Asterisk stop relaying the mini-frames (i.e. why would
>it assume the native transfer took place)?  From the trace I attached
>before, it looks like the client sends a TXCNT message, followed by a
number
>of TXREJ messages.  It appears to never receive an ACK from the Asterisk
for
>the TXREJ message (or is it the other client it is rejecting?) so it sends
>it multiple times.

Ding Ding Ding, for whatever reason the TXREJ aren't getting ACK'd. IAX will
kill any session when a packet times out.

>
> Thoughts?
>
> Adam, did you have anything like this spring up in Firefly?

Nope, sorry