Using *unpacked* 'struct osmo_gcr_parsed' in the MNCC PDUs makes
the protocol even more complicated than it currently is, and
moreover complicates implementing MNCCv8 in the ttcn3-sip-test.
Replace 'struct osmo_gcr_parsed' in 'struct gsm_mncc' with a
fixed-length buffer, which is supposed to hold the Global Call
Reference encoded as per 3GPP TS 29.205.
Check / indicate presence of GCR using the MNCC_F_GCR flag.
Change-Id: Iaff46732948f8f5d03e42f17c35cbac8a80af49b
Fixes: Id40d7e0fed9356f801b3627c118150055e7232b1
Related: OS#5164, OS#5282
* Add GCR to mncc struct and therefore bump mncc version.
* Pass the GCR as a SIP Header to SIP UA and retrieve any such header
from incoming SIP calls, passing the GCR on to MNCC
Related: #OS5164
Depends: osmo-msc I705c860e51637b4537cad65a330ecbaaca96dd5b
Change-Id: Id40d7e0fed9356f801b3627c118150055e7232b1
Add the new SDP section to the MNCC socket protocol, but do not yet implement
forwarding SDP from SIP. Implementing SDP forwarding follows in a subsequent
patch.
It is still possible to establish a call with empty SDP: the new osmo-msc on
the MT side, receiving an MNCC_SETUP_REQ, will hit an error log:
"Got no information of remote audio codecs: neither SDP nor Bearer Capability.
Trying anyway."
and then hold thumbs to hit a codec match, analogous to previous behavior.
Note that osmo-sip-connector should actually always have encoded a Bearer
Capability in the MNCC protocol in the MT MNCC_SETUP_REQ message, but never
has. Now we are ready to leapfrog from zero codec info to full SDP.
This patch must be merged at the same time as osmo-msc patch
Ie16f0804c4d99760cd4a0c544d0889b6313eebb7, so that both sides have a matching
MNCC protocol version number.
Change-Id: Iaca9ed6611fc5ca8ca749bbbefc31f54bea5e925
Links libosmocore (libosmogsm) for access to osmo_mncc_name()
Remove reference to get_mncc_name() in src/mncc_protocol.h
Uses osmo_mncc_name() to output to debug log
which MNCC_* message was received.
Change-Id: I161d1b841ac5fe1b7e092b329ae0674cb340f5ac
Vadim Yanitskiy
Keith Whyte
Pau Espin
Neels Hofmeyr