update the mme handler to get SGW IP address

[AbdallahRustom]

update the MME handler to get SGW IP address from CSR instead of MBR

[wmnsk]

Why do you think it is necessary?

[AbdallahRustom]

hello,

I tried to integrate go-gtp MME and ENB with open5gs core network, the bearer has been successfully created and the tunnel is created but I received the below error, I see that the MME gets the SGWU IP address from Modify Bearer Response which is actually the eNodeB IP address

logs:
[eNB] 2024/01/18 10:02:45 Established S1-MME connection with 127.0.1.12:36412
[eNB] 2024/01/18 10:02:45 Started serving S1-U on 172.22.0.240:2152
[eNB] 2024/01/18 10:02:45 Started serving Prometheus on 172.22.0.240:9092
[MME] 2024/01/18 10:02:45 Sent Create Session Request for 001011234567895
[MME] 2024/01/18 10:02:45 Received Create Session Response from 172.22.0.5:2123
[MME] 2024/01/18 10:02:45 Session created with S-GW for Subscriber: 001011234567895;
S11 S-GW: 172.22.0.5:2123, TEID->: 0x384, TEID<-: 0xf1a08112
[MME] 2024/01/18 10:02:45 Sent Modify Bearer Request for 001011234567895
[MME] 2024/01/18 10:02:45 Received Modify Bearer Response from 172.22.0.5:2123
[MME] 2024/01/18 10:02:45 Bearer modified with S-GW for Subscriber: 001011234567895
[eNB] 2024/01/18 10:02:45 Successfully established tunnel for 001011234567895

Ignored Error Indication: error received from 172.22.0.240, TEIDDataI: 0x3834

Thanks.

pcap.zip

[wmnsk]

seems your zip file broken, can you upload again (preferably with gzip)?