Project

General

Profile

Bug #2846

MSC doesn't close SCCP/BSSAP connection on CM SERV REQ tht cannot be parsed

Added by laforge about 1 month ago.

Status:
New
Priority:
Normal
Assignee:
sysmocom
Category:
-
Target version:
-
Start date:
01/20/2018
Due date:
% Done:

0%

Resolution:

Description

If sending a CM SERV REQ that's invalid, I get

<000a> a_iface_bssap.c:699 Rx BSC DT: 00 15 57 05 01 03 17 0f 05 24 01 01 50 09 21 26 24 10 32 54 76 98 0f 
<000a> a_iface_bssap.c:629 Rx MSC DT1 BSSMAP COMPLETE LAYER 3
<000a> a_iface_bssap.c:291 BSC has completed layer 3 connection (conn_id=1)
<000a> a_iface_bssap.c:311 Unable to parse element CELL IDENTIFIER (wrong field length) -- discarding message!

but the MSC doesn't close the SCCP connection. It also doesn't send AUTH REQ or any other L3 message, basically keeping the radio channel open for no reason at all.

Also available in: Atom PDF