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21 Commits

Author SHA1 Message Date
Sukchan Lee a1a0a8c0a6 [MME] Race condition between S1AP and S6A 
Assume the UE has Attached, the session has been created,
and is in the IDLE state with the UEContextRelease process.

This could result in the following call flow.

1. TAU request without Integrity Protected
2. Authentication request/response
3. Security-mode command/complete

MME can be performed simultaneously by the HSS(S6A) and UE(S1AP).

Update-Location-Request
Service request
Service reject
Delete Session Request
Delete Session Response
Update-Location-Answer
UEContextReleaseCommand for Service reject
TAU reject
UEContextReleaseCommand for TAU reject
UEContextReleaseComplete
UEContextReleaseComplete

MME crashes when UE sends a service request(S1AP) during ULR/ULA(S6A) with HSS,
which has been fixed.
 2024-03-16 23:08:07 +09:00
Sukchan Lee a9694d6474 [MME] Follow-up Cancel Location Handling (#1698) 2022-08-19 16:52:39 +09:00
Sukchan Lee 5524dc5e29 Refact paging module (#1676) 2022-07-30 14:44:34 +09:00
jmasterfunk84 47cbaca149 [MME] Introduce support for S6a Cancel Location Request 
- Added diameter dictionary definitions for Cancel Location
- Cancel Location will completely remove UE from MME, allow for a fresh IMSI attach to occur on next attempt.
- T3422 is used for detach request.
- Added new handling for s6a events in mme-sm, as not all s6a messages are at attach now.  Maybe there's something in a state machine I should've been using here instead of a new flag?

- Testing was completed with UE in idle and connected.  With CLR flags indicating re-attach required and without.  Also sending CLR after UE detach.  And then sending again when mme_ue is empty.
 2022-07-30 14:37:43 +09:00
Sukchan Lee 433d5f6bf3 Distinguish the type of session creation 2022-04-14 17:34:55 +09:00
Sukchan Lee bf77318602 [MME] re-factor to check a piggybacked ESM (#1431) 2022-03-16 20:48:48 +09:00
Sukchan Lee 873cf398c7 [ALL] Add protection of message encoding (#991) 
All process will be forcely exited if it failed to encode the S1AP/NGAP/GTP/PFCP message. It is to make sure there was no problem with the encoding of open5gs.
 2021-05-16 12:22:10 +09:00
Sukchan Lee 5fb0611cb2 fix: Derive ESM cause from GTP-Cause (#755) 2021-01-10 23:36:12 -05:00
Sukchan Lee d64db21050 Use GTP-U Buffering instead of Deletion[#592,#568] 2020-10-07 21:21:48 -04:00
Sukchan Lee 72370ff0b2 Add AUSF, UDM, and UDR 2020-06-04 14:12:05 -04:00
Sukchan Lee 6f6800b52e NGAP is added 2020-05-22 22:24:48 -04:00
Sukchan Lee d191a5135e Add Bearer Resource Modification feature (#336) 2019-12-28 21:46:30 +09:00
Sukchan Lee 636170e0da Review ogs_expect() (#314) 2019-11-30 16:45:09 +09:00
Sukchan Lee f3ccd71db0 [#263] map S6a diameter codes to EMM codes 2019-11-18 10:20:48 +09:00
Sukchan Lee c8bcfffe2e [#258] All GTP message is fixed not to crash 2019-11-15 23:56:55 +09:00
Sukchan Lee 3c8af69805 Re-factoring the all library 2019-09-13 21:07:47 +09:00
Sukchan Lee 90290d236e [#220] T3460 done 2019-07-20 21:28:36 +09:00
Sukchan Lee 7d42465f4e [Done] SMS over SGs 2019-07-13 22:52:50 +09:00
Sukchan Lee cb369daaea fix indentation in MME 2019-07-11 21:53:54 +09:00
Sukchan Lee de59488e2e [CSFB] MT-Active-Mode (Not Done) 2019-07-11 18:14:32 +09:00
Sukchan Lee 477f16ad0b rename project done 2019-06-11 22:10:47 +09:00