Wireshark · Wireshark-dev: Re: [Wireshark-dev] RRC Messages does not decode correctely

Wireshark-dev: Re: [Wireshark-dev] RRC Messages does not decode correctely

From: "Anders Broman (AL/EAB)" <anders.broman@xxxxxxxxxxxx>

Date: Thu, 30 Aug 2007 15:15:39 +0200

Hi,

RRC is using unaligned PER I think. This is not so well tested so there might be a problem in packet-per.c.

If you go to edit->preferences->per and tick the box about detailed per decoding it might be possible to se if

"byte aligning" is taking place where it should not.

Regards

Anders

From: wireshark-dev-bounces@xxxxxxxxxxxxx [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of vaibhav.agarwal@xxxxxxxxxxx
Sent: den 30 augusti 2007 13:09
To: Developer support list for Wireshark; Community support list for Wireshark
Subject: [Wireshark-dev] RRC Messages does not decode correctely

Hi,

0000 4a 88 02 af 20 19 75 46 6c ce 7e 62 e6 72 2a ac
0010 10 bf 4e ff ff ff ff e7 ef f7 d2 69 ff e2 ec 04
0020 40

I am sending this hex dump to RRC this is a rrc connection setup complete message.
RRC dissector decode thsi message correctely , this is rrc connection setup complete but does not decode whole message correctely.

For eg in this message in Item 0 and Item 1 both are showing CS domain, (But if same hex dump decode by another tool it decode correctely one Item is CS domain another is PS domain).
RRC ASN is correct.

this type of some errors comes duringrrc decoding.
please tell what is the problem?

Radio Resource Control (RRC) protocol
UL-DCCH-Message
message: rrcConnectionSetupComplete (18)
rrcConnectionSetupComplete
rrc-TransactionIdentifier: 0
startList: 2 items
Item 0
Item
cn-DomainIdentity: cs-domain (0)
start-Value: 02AF20
Item 1
Item
cn-DomainIdentity: cs-domain (0)
start-Value: 197546
ue-RadioAccessCapability
pdcp-Capability
.... .1.. losslessSRNS-RelocationSupport: True
supportForRfc2507: supported (1)
supported: by1024 (1)
rlc-Capability
totalRLC-AM-BufferSize: kb500 (5)
maximumRLC-WindowSize: mws4095 (1)
maximumAM-EntityNumber: am4 (1)
transportChannelCapability
dl-TransChCapability
maxNoBitsReceived: b20480 (9)
maxConvCodeBitsReceived: b163840 (12)
turboDecodingSupport: supported (1)
supported: Unknown (15)
maxSimultaneousTransChs: e16 (2)
maxSimultaneousCCTrCH-Count: 4
maxReceivedTransportBlocks: tb8 (1)
maxNumberOfTFC: tfc512 (7)
maxNumberOfTF: tf64 (1)
ul-TransChCapability
maxNoBitsTransmitted: b20480 (9)
maxConvCodeBitsTransmitted: b163840 (12)
turboEncodingSupport: supported (1)
supported: b1280 (1)
maxSimultaneousTransChs: e8 (2)
modeSpecificInfo: tdd (1)
tdd
maxSimultaneousCCTrCH-Count: 3
maxTransmittedBlocks: Unknown (11)
maxNumberOfTFC: dummy1 (0)
maxNumberOfTF: tf128 (2)
rf-Capability
physicalChannelCapability
tddPhysChCapability
downlinkPhysChCapability
maxTS-PerFrame: 8
maxPhysChPerFrame: 234
minimumSF: sf16 (1)
.... ..1. supportOfPDSCH: True
maxPhysChPerTS: 8
uplinkPhysChCapability
maxTS-PerFrame: 16
maxPhysChPerTimeslot: ts2 (1)
minimumSF: Unknown (7)
...1 .... supportOfPUSCH: True
ue-MultiModeRAT-Capability
multiRAT-CapabilityList
.... 1... supportOfGSM: True
.... .1.. supportOfMulticarrier: True
multiModeCapability: Unknown (3)
securityCapability
cipheringAlgorithmCap: FFFF
integrityProtectionAlgorithmCap: E7EF
ue-positioning-Capability
1... .... standaloneLocMethodsSupported: True
.1.. .... ue-BasedOTDOA-Supported: True
networkAssistedGPS-Supported: noNetworkAssistedGPS (3)
.... 0... supportForUE-GPS-TimingOfCellFrames: False
.... .1.. supportForIPDL: True
v370NonCriticalExtensions
rrcConnectionSetupComplete-v370ext
ue-RadioAccessCapability-v370ext
ue-RadioAccessCapabBandFDDList: 7 items
Item 0
Item
radioFrequencyBandFDD: fdd1900 (1)
fddRF-Capability
ue-PowerClass: class2 (1)
txRxFrequencySeparation: spare1 (2)
measurementCapability
compressedModeMeasCapabFDDList: 8 items
Item 0
Item
radioFrequencyBandFDD: extension-indicator (7)
.... ..1. dl-MeasurementsFDD: True
.... ...1 ul-MeasurementsFDD: True
Item 1
Item
radioFrequencyBandFDD: bandVII (6)
.... 0... dl-MeasurementsFDD: False
.... .0.. ul-MeasurementsFDD: False
Item 2
Item
radioFrequencyBandFDD: bandVI (3)
..1. .... dl-MeasurementsFDD: True
...0 .... ul-MeasurementsFDD: False
Item 3
Item
radioFrequencyBandFDD: bandIV (4)
0... .... dl-MeasurementsFDD: False
.0.. .... ul-MeasurementsFDD: False
Item 4
Item
...0 .... dl-MeasurementsFDD: False
.... 0... ul-MeasurementsFDD: False
Item 5
Item
radioFrequencyBandFDD: fdd2100 (0)
.1.. .... dl-MeasurementsFDD: True
..0. .... ul-MeasurementsFDD: False
Item 6
Item
.... 0... dl-MeasurementsFDD: False
.... .0.. ul-MeasurementsFDD: False
Item 7
Item
.... ...0 dl-MeasurementsFDD: False
[Malformed Packet: RRC]

0000 4a 88 02 af 20 19 75 46 6c ce 7e 62 e6 72 2a ac J... .uF l.~b.r*.
0010 10 bf 4e ff ff ff ff e7 ef f7 d2 69 ff e2 ec 04 ..N..... ...i....
0020 40

Thanks & Regards,
Vaibhav

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Follow-Ups:
- Re: [Wireshark-dev] RRC Messages does not decode correctely
  - From: Anders Broman (AL/EAB)

References:
- [Wireshark-dev] RRC Messages does not decode correctely
  - From: vaibhav . agarwal

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