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Bug #2731
closedOpenBSC doesn't release lchan if MSC does a hard SCCP disconnect
Start date:
12/09/2017
Due date:
% Done:
100%
Spec Reference:
Description
When the MSC doesn't follow normal procedure of ClearCommand but simply hard disconnects the SCCP connection (such as possible in any number of failure scenarios), we are not clearing the lchan / radio channel:
<000a> osmo_bsc_sigtran.c:258 Initializing resources for new SIGTRAN connection to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP,GTI=NO_GT... <000a> osmo_bsc_sigtran.c:287 Allocated new connection id: 27 <000a> osmo_bsc_sigtran.c:315 Opening new SIGTRAN connection (id=27) to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP,GTI=NO_GT <001a> osmo_bsc_sigtran.c:196 N-CONNECT.cnf(27) <001a> osmo_bsc_sigtran.c:220 N-DISCONNECT.ind(27, cause=768) <000a> osmo_bsc_sigtran.c:381 sccp connection (id=27) not cleared (gsm subscriber connection still active) -- forcefully clearing it now! <0005> bsc_api.c:291 The lchan should have been cleared. OsmoBSC> show lchan BTS 0, TRX 0, Timeslot 1, Lchan 0: Type TCH_F Connection: 0, State: ACTIVE BS Power: 3 dBm, MS Power: 16 dBm Channel Mode / Codec: signalling No Subscriber Bound IP: 0.0.0.0 Port 0 RTP_TYPE2=0 CONN_ID=0 Measurement Report: Flags: DLinval RXL-FULL-ul: -110 dBm, RXL-SUB-ul: -110 dBm RXQ-FULL-ul: 0, RXQ-SUB-ul: 0
I'm adding testcase TC_chan_rel_hard_rlsd
about this to the BSC_Tests TTCN-3 testuite.
Related issues
Updated by laforge over 6 years ago
- Related to Bug #2726: OsmoBSC doesn't release lchan if MSC refuses connection (CR -> CREF) added
Updated by laforge over 6 years ago
- Status changed from New to In Progress
- Assignee changed from dexter to laforge
- % Done changed from 0 to 70
I have a patch for this in Change-Id I64a46b5bcd4272e3fa2ff4ee824c2f3fdff6854b of the lafogre/fsm branch
Updated by laforge about 6 years ago
- Status changed from In Progress to Stalled
waiting for dexter to complete the work on the FSM branch
Updated by laforge about 6 years ago
- Status changed from Stalled to Resolved
- % Done changed from 70 to 100
fsm branch has been merged (including related patch). BSC_Tests.TC_chan_rel_hard_rlsd now passes.
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