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Bug #2768

OsmoBSC doesn't perform MGCP DLCX in all cases of channel release

Added by laforge about 1 month ago. Updated 14 days ago.

Status:
New
Priority:
High
Assignee:
Category:
A interface
Target version:
-
Start date:
12/17/2017
Due date:
% Done:

0%

Spec Reference:

Description

Whenever we performed CRCX on one or multiple MGCP connections on osmo-mgw, we must also call DLCX to clean up.

There are situations like at least the one seen in the attached PCAP file in which CRCX+MDCX are called, but the media gateway never sees a DLCX.

I've seen this cause follow-on problems if more connections are allocated on the same endpoint, at which the mgw will refues as only two connections are permitted by endpoint.

We should have a state machine that ensures whever the SCCP connection is closed, and that SCCP connection had MGCP connections, that those MGCP connections are deleted.

crcx-mdcx-ciph_mod_rej-no_dlcx.pcapng (5.19 KB) laforge, 12/17/2017 08:06 PM

History

#1 Updated by laforge 14 days ago

  • Assignee changed from sysmocom to dexter

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