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Wireshark-bugs: [Wireshark-bugs] [Bug 6146] New: Malformed RANAP packets when HandOver procedure

Date: Thu, 21 Jul 2011 07:18:36 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6146

           Summary: Malformed RANAP packets when HandOver procedure on iuh
           Product: Wireshark
           Version: 1.6.1
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: slawa_m@xxxxxxxxxx


Created an attachment (id=6691)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=6691)
HandOver procedure: iuh - RANAP 

Build Information:
Version 1.6.1 (SVN Rev 38096 from /trunk-1.6)

Copyright 1998-2011 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled (32-bit) with GTK+ 2.22.1, with GLib 2.26.1, with WinPcap (version
unknown), with libz 1.2.5, without POSIX capabilities, without libpcre, with
SMI
0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS 2.10.3,
with
Gcrypt 1.4.6, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built
Jul
18 2011), with AirPcap.

Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.1.2
(packet.dll version 4.1.0.2001), based on libpcap version 1.0 branch 1_0_rel0b
(20091008), GnuTLS 2.10.3, Gcrypt 1.4.6, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 21022

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.
--
Hi, I have some problem with decoding a RANAP packet when I perform a HandOver.
Some RANAP packets are malformed in this case. 
I have opened the problem report agains our developers, but they claim that the
message is with accordance with  3GPP TS 25413 and this is a bug of Wireshark. 
See below the description of a problem. 
=====

When HO procedure is performed (IntraFrequency HO), some RANAP packets are
malformed: 
1. id-RelocationPreparation (source HNB --> GW) 
Radio Access Network Application Part
ToTargetRNC-Container: interRATHandoverInfo (0)
    interRATHandoverInfo: criticalExtensions (1)
[Malformed Packet: RANAP]
    [Expert Info (Error/Malformed): Malformed Packet (Exception occurred)]
        [Message: Malformed Packet (Exception occurred)]
        [Severity level: Error]
        [Group: Malformed]1.id-RelocationResourceAllocation (target HNB --> GW)
HandoverToUTRANCommand: criticalExtensions RRC packet malformed

2. id-RelocationResourceAllocation  (trg HNB --> GW)
Radio Access Network Application Part
HandoverToUTRANCommand: criticalExtensions (1)
    criticalExtensions: criticalExtensions (1)
        criticalExtensions: r5 (0)
            r5
                handoverToUTRANCommand-r5
                    new-U-RNTI
                    cipheringAlgorithm: uea0 (0)
                    specificationMode: complete (0)
                        complete
                            srb-InformationSetupList: 8 items
                                Item 0
                                    SRB-InformationSetup-r5
                                        rlc-InfoChoice: same-as-RB (1)
                                            same-as-RB: 6
                                        rb-MappingInfo: 1 item
                                Item 1
                                    SRB-InformationSetup-r5
                                        rlc-InfoChoice: rlc-Info (0)
                                            rlc-Info
                                                something unknown here [unknown
extension root index in choice]
[Malformed Packet: RRC]
    [Expert Info (Error/Malformed): Malformed Packet (Exception occurred)]
        [Message: Malformed Packet (Exception occurred)]
        [Severity level: Error]
        [Group: Malformed]

3. id-RelocationPreparation (GW --> source HNB) 
Radio Access Network Application Part
[Malformed Packet: RANAP]
    [Expert Info (Error/Malformed): Malformed Packet (Exception occurred)]
        [Message: Malformed Packet (Exception occurred)]
        [Severity level: Error]
        [Group: Malformed]

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