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2020-12-01gmm: Introduce comment to ease addition of Network feature support IE laterPau Espin Pedrol1-0/+3
Change-Id: I131cba3de3c80c61d5549e7c31b4eacaaeddb040
2020-12-01gmm: fix build without define PTMSI_ALLOCPau Espin Pedrol1-3/+7
Change-Id: Idcac01c4634af81ef884dc2b1b20dec3f8d12236
2020-10-23process_ms_ctx_status: Fix crash deleting PDP Ctx if GTP side was already ↵Pau Espin Pedrol1-1/+4
released sgsn_delete_pdp_ctx() should never be called without checking if the GTP side is available, since it may happen that it has already been released by the time the mmctx tells us the pdp ctx is gone on the MS side. Fixes: OS#4817 Change-Id: Ie618874545172ec98355174a2ee041fc4a8bec16
2020-10-23process_ms_ctx_status: refactor to avoid code duplicationPau Espin Pedrol1-15/+10
Change-Id: I1d1a1284c1563b3a5598e79d8ffd544288de4d62
2020-09-21Fix Radio Priority in MM Attach and PDP Context ActivationKeith1-1/+1
3GPP TS 24.008 Section 10.5.7.2 Radio Priority states that the Radio Priority IE is 3 bits as follows: -------------------------------------------- 0 0 1 priority level 1 (highest) 0 1 0 priority level 2 0 1 1 priority level 3 1 0 0 priority level 4 (lowest) All other values are interpreted as priority level 4 by this version of the protocol. -------------------------------------------- However at least the MediaTek MT6753 and MT6592 have been observed to interpret a value of 0 0 0 in an undetermined way resulting in lack of access to RACH in the cell. Fixes: OS#4506 Change-Id: I810cd541eb5764ee3f2c238bcd3a10836228d0b5
2020-09-20gmm: on invalid RA id reject the MS with an implicit detachAlexander Couzens1-10/+20
As long the SGSN doesn't support PS handover treat unknown RA as invalid and do an implicit detach. Fixes ttcn3 crash when an RAU happen within an Attach Request Change-Id: I6a0b335d51f58c26349f7e0a62b2107d7d351d07
2020-06-18use new osmo_mobile_identity API everywhereNeels Hofmeyr1-70/+86
Depends: If4f7be606e54cfa1c59084cf169785b1cbda5cf5 (libosmocore) Change-Id: I4cacb10bac419633ca0c14f244f9903f7f517b49
2020-05-10fix nullpointer: in gsm48_rx_gmm_ra_upd_req()Neels Hofmeyr1-1/+1
This caused frequent crashes at 36c3. The "proper" fix is probably elsewhere (lynxis mentions an unfinished patch), but at least this prevented some crashes during active operation. Once this is merged, we can (re)enable SGSN_Tests_Iu.TC_geran_attach_iu_rau, which tests exactly for this scenario: A Subscriber / MM context that is so far attached via GERAN, but now receives a RAU via UTRAN/Iu. Closes: OS#4339 Change-Id: Ifde15dc4151d84748f0e67b32c9c260cb2d9d8fc
2020-02-04gprs_gmm_fsm.c: Implement RAT change between 2g and 3gAlexander Couzens1-1/+31
Related: OS#2737 Change-Id: I3fc614da6ba137e871ee0fe86ca22b6a4a354dd2
2020-02-04gprs_gmm: Check for RAT change and ensure this only happens for RAU/ATTDaniel Willmann1-0/+27
Change-Id: I38cb31907eddeade5350cdb648df179408d908d2 Related: OS#3727
2019-11-21gprs_gmm.c: Send XID reset with received TLLIPau Espin Pedrol1-1/+1
Otherwise lower layers will end up using a TLLI from PTMSI which was not yet announced to the MS if it is still not in GMM attached state, as showcased by SGSN_Tests.TC_attach_req_id_req_ra_update. Related: OS#3957, OS#4245 Change-Id: Ide51726abb82f5784eca4ab8d62b2ad8512be843
2019-11-21Improve logging in gprs_llc.c codePau Espin Pedrol1-2/+2
Change-Id: Id89cc6760179fb9b1709a30b5d1af41d466b280b
2019-11-08gmm: Fix assertion hit during RA UPD REQ before completting gmm attachPau Espin Pedrol1-2/+2
Output: 20191107021548500 DMM <0002> gprs_gb.c:40 MM_STATE_Gb(2596296189)[0x6120000084a0]{Idle}: Received Event E_MM_PDU_RECEPTION 20191107021548500 DMM <0002> gprs_gmm.c:1531 MM(/d4b6d7af) -> GMM RA UPDATE REQUEST type="RA updating" 20191107021548501 DMM <0002> gprs_gmm.c:1615 MM(/d4b6d7af) The MM context cannot be used, RA: 901-70-2758-208 Assert failed mmctx->gb.llme == NULL gprs_gmm.c:1620 Scenario reproducing the crash can be triggered with TTCN3 SGSN_Tests.TC_attach_req_id_req_ra_update. Basically, SGSN first receives an ATTACH REQ with a given RA ID, then SGSN switches to state CommonProcedureInitiated and sends GMM ID REQ, and MS/PCU answers immediatelly with a RA Update instead with a new RA ID. Related: OS#3957, OS#4245 Change-Id: I64fa5cf1b427d3abb99e553e584897261a827ce6
2019-10-08gprs_gmm: release Iu connection on RAU failuresAlexander Couzens1-0/+6
When a RAU fails without an a GMM context, release the Iu connection after sending a response. Change-Id: I05a9200f55d608ccfb3f86184c324a2b428da76b
2019-09-03Split out GPRS SM layer into its own filePau Espin Pedrol1-700/+6
Change-Id: Ie61d22e7868af6de73cdf9c731f07130b282599d
2019-09-03Implement GMM State using osmocom FSMPau Espin Pedrol1-23/+21
State machine inspired in the one from TS 24.008 4.1.3.3.1. Some state transitions are inroduced in the code but are still commented out since we lack some functionalitites or improvements in the code to handle different scenarios. Most of the logic is still outside of the FSM, but at least now the states are handled in a sane way triggered by events. Change-Id: Idecb43c10d66224d4f9ba9320825040ce6cf9a07
2019-09-02gmm: Move code handling GMM PTMSI Realloc Complete to its own functionPau Espin Pedrol1-11/+17
Change-Id: I3b21a976c6683bea5419a33f0ccb8b56483d6e21
2019-09-02gmm: Move code handling GMM Routing Area Update Complete to its own functionPau Espin Pedrol1-25/+32
Change-Id: I8e28ac03edf82374e804701ebe635e1171a2b36a
2019-09-02gmm: Move code handling GMM Attach Complete to its own functionPau Espin Pedrol1-33/+40
Change-Id: I2d8d947ab1eb4100f404b885461f7a30583c9ac6
2019-09-02Move out sgsn to its own subdirPau Espin Pedrol1-0/+2852
Change-Id: I16fccc0eadf588599b9e5578d0f4dbaf9df81737