A friend in the community was trying to connect an SMF made by another
manufacturer with an SBI interface and found a big problem with Open5GS.
All of the code in the part that generates the Resource URI
from HTTP.location is invalid.
For example, suppose we create a Resource URI with SMContext as below.
{apiRoot}/nsmf-pdusession/<apiVersion>/sm-contexts/{smContextRef}
In this case, Open5GS extracted the {smContextRef} part of the HTTP.location
and appended it to the beginning
{apiRoot}/nsmf-pdusession/<apiVersion>/sm-contexts/.
This implementation may not work properly if the apiRoot changes.
Consider a different port number as shown below.
<HTTP.location>
127.0.0.4:9999/nsmf-pdusession/v1/sm-contexts/1
The SMF may send an apiRoot to the AMF with a changed port number,
in which case the AMF must honor it.
Therefore, instead of extracting only the smContextRef from HTTP.location,
we modified it to use the whole thing to create a Resource URI.
We modified all NFs that use HTTP.location in the same way, not just SMFs.
* [SBI] Handle and store AMF info
* [SBI] Add "target GUAMI" discovery option
* [SBI] Handle UeContextTransfer request and response messages
* [AMF] Handle NF discovery from AMF to AMF
* [AMF] Add UE Context Transfer Request/Response from AMF to AMF
* [SCP] Handle UeContextTransfer
* Follow-up on #3052
* [AMF] force authentication after 'Ue context transfer' for now
* [AMF] force authentication after 'Ue context transfer' for now
---------
Co-authored-by: Sukchan Lee <acetcom@gmail.com>
According to 3GPP TS 29.510, the search parameter "tai" should be a
single item, not an array of items.
TS 29.510: Table 6.2.3.2.3.1-1:
URI query parameters supported by the GET method on this resource
Revert "[SBI] Change discovery option TAI from array to single item"
This reverts commit b4beff1ae16c64b3c6d84d8bdb47c36e19b705f2.
wip
This problem can be occurred in the following scenarios.
1. Run NFs(NRF/SCP/SMF/UPF/AUSF/UDM/PCF/BSF/NSSF/UDR) except AMF.
2. Run AMF
3. Run gNB/UE and try to register
4. STOP PCF
5. AMF Crashed
AMF discovered the PCF through SCP during the UE registration process.
At this time, ogs_sbi_nf_fsm_init() is not called,
so AMF does not have state information about PCF.
In other words, AMF state is NULL.
In such a situation, when PCF is terminated at this time,
a crash occurs as AMF attempts to change the PCF state.
So, I've fixed that state information is initialized to solve this problem.
Other NF instances are obtained through NRF
or created directly through configuration files.
Other NFs created by the config file should not be passed
through NRF discovery or anything like that.
Since self-created NF Instances do not have an ID,
they are implemented to exclude them from NRF Discovery.
== Known limitation ==
Placing npcf-smpolicycontrol and pcf-policyauthorization
in different NFs is not supported. Both npcf-smpolicycontrol
and pcf-policyauthorization should be placed in the same NF.