[MB-UPF] PFCP: PFCP Session Establishment Response

[Borjis131]

Following 3GPP TS 29.244 - Release 17.9.0

Add PFCP IEs:

• 8.2.207 - Multicast Transport Information

To be used in PFCP Session Establishment Response:

• MBS Session N4mb Information (grouped IE with Multicast Transport Information)

[Borjis131]

Raised an issue into Wireshark's GitLab to correct a bug parsing the C-TEID field in the PFCP Session Establishment Response

[Borjis131]

Issue with 3GPP TS 29.244 having an incorrect information element name on the table 7.5.3.1-4 for MBS Session N4mb Information IE being discussed here: 5G-MAG/Standards#99

Open5GS fixed this here: open5gs#2887

[Borjis131]

In order to forward the packets MB-UPF makes use of smcroute:

# Inside  MB-UPF container
apt install smcroute
smcroute -d
smcroutectl add eth0 239.0.0.20 ogstun
# Check the route is correctly added
smcroutectl

You could add an static route with iproute2 achieving the same funcitonality, but using the smcroute way could make this approach to be auto configurable.