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44 Commits

Author SHA1 Message Date
Sukchan Lee 0dd2ad6557 [MME] Added log messages to find memory problem 2024-02-27 21:16:50 +09:00
Pau Espin 60691b02d2 [MME] Gn: Introduce initial support for 2G->4G cell reselection 
In an Inter-RAT setup a UE could perform a TAU coming from a 2G/3G network.
In that case the UE/MS is unknown to the MME and it should request the
SGSN context (MM, PDP) from the old SGSN. This is done through the following
GTPv1C message exchange on the Gn interface of SGSN and MME:
SGSN <- MME: SGSN Context Request
SGSN -> MME: SGSN Context Response
SGSN <- MME: SGSN Context Acknowledge

Diagram with full set of steps can be found at 3GPP TS 23.401 D.3.6.

This commit doesn't aim to be a complete implementation of the mentioned
procedure, since it's quite a complex one, with lots of fields and logic
required. This so far only implements in general the minimally
successful case by filling as much as possible the required set of
fields.
This will allow for a base onto which do incremental improvements and
fixes while testing against UEs and SGSNs (such as osmo-sgsn, which
doesn't yet support this procedure but will potentially earn it soon).

The reverse direction, aka UE issuing cell reselection 4G->2G was
already implemented (same as here, initial non-complete implementation)
in open5gs-mmed in commit 3d693da73e.

Related: https://osmocom.org/issues/6294
 2024-01-17 23:05:19 +09:00
Shigeru Ishida 0c3fd10c24 [MME] add facility to select smf(pgwu) by tac and e_cell_id. 
[mme.yaml]
# o SMF selection by eNodeB TAC
#   (either single TAC or multiple TACs, DECIMAL representation)
#
#   gtpc:
#     - addr: 127.0.0.4
#       tac: 26000
#     - addr: 127.0.2.4
#       tac: [25000, 27000, 28000]
#
# o SMF selection by e_cell_id(28bit)
#   (either single or multiple e_cell_id, HEX representation)
#
#   gtpc:
#     - addr: 127.0.0.4
#       e_cell_id: abcde01
#     - addr: 127.0.2.4
#       e_cell_id: [12345, a9413, 98765]
 2023-05-05 10:23:46 +05:00
Sukchan Lee 01d3db4b6e [MME/SMF] Added Extended-PCO in 4G/LTE (#2261) 2023-04-22 00:06:50 +09:00
Sukchan Lee c6fd4ae6b8 [LOG] remove ogs_expect_or_return()/return_val() 2023-01-24 00:01:36 +09:00
Sukchan Lee 1d17e68c56 [ALL] Removing trailing whitespace and tab 2022-09-02 23:38:39 +09:00
jmasterfunk84 eb03704015 Moving handling of assigning sub level cc into the pdn to s11. 2022-07-24 12:29:01 +09:00
jmasterfunk84 68140efce4 [MME] Handle Charging Characteristics 
Found no support for HSS provided charging characteristics.  Following TS32.251 A.4:
- Use PDN level CC, if one wasn't provided then use subscription level CC
- Don't send CC in S11 if it wasn't included
 2022-07-24 12:29:01 +09:00
Sukchan Lee 4d2f7726b9 X2 handover with SGW change (#1367, #1459) 2022-05-12 22:52:36 +09:00
Sukchan Lee de2ecd6400 [GTP2] Fixed handling multi-bearer messages(#1498) 2022-04-29 21:28:16 +09:00
Pau Espin e3da7c9934
Rename GTPv2C specifics to gtp2 prefix (#1485) 
In the past only GTPv2C was supported, and had the "gtp" generic prefix.
Later on, GTPv1C support was added, and "gtp1" prefix was used.
Let's move GTPv2C specific bits to have "gtp2" prefix too, and leave
"gtp" prefix for generic stuff among different GTP versions.
 2022-04-13 07:07:39 +09:00
Sukchan Lee bfa34be222 fix the buffer overflow (CVE-2021-41794) 2021-11-15 15:49:58 +09:00
Sukchan Lee 9ba4b317d2 Improve GTP message (#1201) 
Extended Indication
Add Delay Value
 2021-10-16 17:26:30 +09:00
Sukchan Lee 4537142929 [EPC] Support ePDG Interface (#1039) 2021-06-21 22:36:38 +09:00
Sukchan Lee 9e664a744b [MME] refine the pull request #1049 2021-06-13 12:03:36 +09:00
R. Medeiros a252fae84f
Indication Dual Address Bearer for create session request. (#1049) 
* Update mme-s11-build.c

Add indication Dual Address Bearer in the create session request when the PDN is IPv4v6 Type, Info: 3GPP TS 29.274

* Update mme-s11-build.c
 2021-06-13 11:52:23 +09:00
Sukchan Lee 118d62d42d Add more memory log 2021-06-06 22:35:46 +09:00
Sukchan Lee 5901582281 [GTPv2] fix incorrect formatting PLMN-ID (#969) 2021-05-05 22:51:50 +09:00
Sukchan Lee 37e0a714f9 Fixes UE IPv6 BUG (#808) 2021-03-15 10:01:55 +09:00
Sukchan Lee 9af4268bab arch: DB schema Changes (#796) 
- New function : NSSF
- New feature : SMF selection
 2021-03-08 21:25:09 +09:00
Sukchan Lee 5fb0611cb2 fix: Derive ESM cause from GTP-Cause (#755) 2021-01-10 23:36:12 -05:00
Sukchan Lee f1a207fd9b Support VoLTE service in ECM-IDLE 2020-11-07 17:27:12 -05:00
Sukchan Lee 88399da5b6 Fix release access bearer #592 2020-10-01 13:27:58 -04:00
Sukchan Lee 887a0a10d3 Fixing the problem of the test program 2020-09-01 23:04:35 -04:00
Sukchan Lee bc476c2e0e Instead of OGS_NEXT_ID, Use memory pool-index 2020-08-29 23:27:54 -04:00
Sukchan Lee a71d2ee3db refine SGW/UPF selection code 2020-07-09 01:38:09 -04:00
Sukchan Lee 3c6711c9c8 If HSS/UDR gets MSISDN, AMF/MME -> SMF/SGW [#464] 2020-06-29 22:12:24 -04:00
Sukchan Lee ca4ee27e84 more bug is fixed 2020-06-27 00:46:06 -04:00
Sukchan Lee c54e85c5c0 Session-AMBR changes required field in WebUI 2020-06-17 21:43:16 -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 896ca50253 PFCP interface added, but not tested. 2019-12-07 13:17:00 +09:00
Sukchan Lee ce6d2c5889 Before CUPS, move GTP-TLV to core library 
TLV library will be shared in GTP and PFCP
 2019-12-01 20:46:53 +09:00
Sukchan Lee 636170e0da Review ogs_expect() (#314) 2019-11-30 16:45:09 +09:00
Spencer Sevilla 5b59f09d9f ogs_assert to ogs_expects (#314) 
* HACK: Don't retransmit InitialContextSetupReq

Related: #256

* HACK: Don't use buggy sa1p_copy()  in eNBConfigTransfer

Related: #257

* mme: don't reject with 'IMSI is unknown in HLR' (permanent reject)

* MME: Implement S6a result -> EMM cause code mapping

Closes: #263

* Spencer: modification to Haralds fix because macros are now renamed

* MME: don't assert on MAC failures of uplink NAS frames

Closes: #267

* MME: Avoid ogs_assert() in many situations

We don't want to crash the entire program just because a message
received from an external entity didn't match some of our expectations.

* compiles fine, checked DIFFs and only difference is the ogs_assert -> ogs_expect
 2019-11-29 15:31:22 +09:00
Sukchan Lee 7b7acea59b Add IMEISV(MEI) in Create Session Request 2019-11-18 20:21:20 +09:00
Sukchan Lee 835b3c9851 [#306] Refine static IP addresses 2019-11-17 17:43:36 +09:00
Spencer Sevilla b994a8efbf Adding support for static IP assignment in HSS (#306) 2019-11-14 14:30:19 +09:00
Sukchan Lee 3c8af69805 Re-factoring the all library 2019-09-13 21:07:47 +09:00
Sukchan Lee 1f7647a04b [#266] Add LOG for debugging 2019-08-27 22:54:45 +09:00
Sukchan Lee cb369daaea fix indentation in MME 2019-07-11 21:53:54 +09:00
Sukchan Lee 334c678995 Fix the Security Command Reject (#214) 2019-07-04 22:48:26 +09:00
Sukchan Lee bbc594330b [SGsAP] update it 2019-06-21 18:23:29 +09:00
Sukchan Lee 477f16ad0b rename project done 2019-06-11 22:10:47 +09:00