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GMM_IDENTITY_REQUEST decoding problem

asked 2018-02-28 14:18:50 +0000

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Hello,

I am decoding GMM_IDENTITY_REQUEST and it always shows GMM Cause with cause = Illegal MS .

raw data = Buffer 0000 - 000F 08 15 03

Decode output:

Message Content
    GSM A-I/F DTAP - Identity Request                                                                                                                             
           Protocol Discriminator: GPRS mobility management messages (8)  
            .... 1000 = Protocol discriminator: GPRS mobility management messages (0x08)  
            0000 .... = Skip Indicator: No indication of selected PLMN (0)  
        DTAP GPRS Mobility Management Message Type: Identity Request (0x15)  
        GMM Cause  
            GMM Cause: Illegal MS (3)
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Comments

What version of Wireshark? OS?

Anders gravatar imageAnders ( 2018-02-28 16:07:13 +0000 )edit

Latest released version of wirshark on window 10

Puneet gravatar imagePuneet ( 2018-03-01 06:55:39 +0000 )edit

Try a development build from https://www.wireshark.org/download/au...

Anders gravatar imageAnders ( 2018-03-01 11:30:06 +0000 )edit

Thanks Anders for your valuable information.

Puneet gravatar imagePuneet ( 2018-03-01 12:19:58 +0000 )edit

1 Answer

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answered 2018-02-28 16:23:15 +0000

Anders gravatar image

It works for me on the development version of Wireshark.

GSM A-I/F DTAP - Identity Request
Protocol Discriminator: GPRS mobility management messages (8)
DTAP GPRS Mobility Management Message Type: Identity Request (0x15)
Identity Type 2
Force to Standby
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Asked: 2018-02-28 14:18:50 +0000

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Last updated: Feb 28