[asterisk-dev] SIP headers not available on REFER

[Brent Thomson]

Posting this here because it feels like a bug might be causing it.

My phones all go through the [outgoing] context when they
dial/forward/transfer. Here's the [outgoing] context:

  '_[*0-9].' =>     1. Noop(X-foo: ${SIP_HEADER(X-foo)}) [pbx_config]
                    2. Set(FOO=${SIP_HEADER(X-foo)}) [pbx_config]
     [AGI]          3. Agi(hagi://agi/outgoing.agi) [pbx_config]
                    4. Hangup() [pbx_config]

Works fine for dialing (INVITE) and forward (302). Also works fine for
attended transfers (INVITE). However, when the outgoing context is
reached due to a blind transfer (REFER) the headers aren't available.
Here's the output on a blind transfer (REFER):

Executing [7112 at outgoing:1] NoOp("SIP/10.128.2.1-c0022708", "X-foo: ")
in new stack

And here's the output from an attended transfer (INVITE):

Executing [7112 at outgoing:1]
NoOp("SIP/0123ee70-3829-ef6d-a78e-0001012c0001-ac0e2978", "X-foo: bar")
in new stack

The SIP debug on the CLI shows that the header is in the message
received in both cases. Any ideas why I can't query the header in the
REFER scenario?

Running 1.6.1.6

-Brent