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Bug #2961

OsmoSGSN / libgtp don't support GGSN-initiated PDP Context Deactivation

Added by laforge 5 months ago. Updated about 20 hours ago.

Status:
Resolved
Priority:
Normal
Assignee:
Category:
GTP interface
Target version:
-
Start date:
02/18/2018
Due date:
% Done:

100%

Estimated time:
Spec Reference:

Description

The GGSN can at any time deactivate a PDP context. See 3GPP TS 29.060:

7.3.5 Delete PDP Context Request
A Delete PDP Context Request shall be sent from a SGSN node to a GGSN node as part of the GPRS Detach procedure or the GPRS PDP Context Deactivation procedure or from a GGSN node to a SGSN node as part of the PDP Context Deactivation Initiated by GGSN procedure.

However, if we do this with OsmoSGSN, OsmoSGSN will log:

Sun Feb 18 22:23:15 2018 DLGTP <0025> gtp.c:3026 Packet from 127.0.0.2:2123, length: 14 content: 32 14 00 06 00 00 00 01 00 17 00 00 14 05 : Unexpected GTPv1 Signalling Message

I have created SGSN_Tests.TC_attach_pdp_act_user_deact_mt to provoke this situation.

History

#1 Updated by laforge 5 months ago

  • Assignee set to sysmocom

#2 Updated by pespin 1 day ago

  • Status changed from New to In Progress
  • Assignee changed from sysmocom to pespin

#3 Updated by pespin about 20 hours ago

  • Status changed from In Progress to Resolved
  • % Done changed from 0 to 100

Fixed by latest bunch of gerrit patches submitted, specially:
osmo-ggsn (libgtp) https://gerrit.osmocom.org/#/c/osmo-ggsn/+/9988/
osmo-sgsn https://gerrit.osmocom.org/#/c/osmo-sgsn/+/10002/

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