[NRF] SBI: NRF NFDiscovery Service API

[Borjis131]

Following 3GPP TS 29.510 - Release 17.11.0

• MB-SMF TMGI Service API
• MB-SMF MBS Session Service API
• AMF MBS Broadcast Service API

[Borjis131]

NFDiscovery Service is already implemented in Open5GS. The only thing needed is to build the NF service information to be transmitted to the NRF and allow the NF type of the consumer.

[Borjis131]

Requests from the AF to discover the TMGI and MBS Session Service APIs:

# TMGI discovery
curl --http2-prior-knowledge \
  --request GET \
"nrf.open5gs.org:80/nnrf-disc/v1/nf-instances?requester-nf-type=AF&service-names=nmbsmf-tmgi&target-nf-type=SMF"

# MBS Session discovery
curl --http2-prior-knowledge \
  --request GET \
"nrf.open5gs.org:80/nnrf-disc/v1/nf-instances?requester-nf-type=AF&service-names=nmbsmf-mbssession&target-nf-type=SMF"