Wireshark-bugs: [Wireshark-bugs] [Bug 10842] Cannot dissect gtp prime data record with rel. 7.5.
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Tue, 13 Jan 2015 08:31:39 +0000

Comment # 3 on bug 10842 from 
(In reply to Anders Broman from comment #1)
> From what I can see the record type is:
> 
> ...1 0101 = Tag: 21
> 
> GPRSRecord	::= CHOICE 
> --
> -- Record values 20, 22..27 are specific
> -- Record values 76, 77, 86 are MBMS specific
> -- Record values 78,79 and 92, 95, 96 are EPC specific 
> --
> {
> 	sgsnPDPRecord			[20] SGSNPDPRecord,
> 	sgsnMMRecord			[22] SGSNMMRecord,
> 
> Which isn't specified in the ASN1 description, should it have been record
> type 20? or what type of record is it supposed to be?

I just successfully(In reply to Anders Broman from comment #1)
> From what I can see the record type is:
> 
> ...1 0101 = Tag: 21
> 
> GPRSRecord	::= CHOICE 
> --
> -- Record values 20, 22..27 are specific
> -- Record values 76, 77, 86 are MBMS specific
> -- Record values 78,79 and 92, 95, 96 are EPC specific 
> --
> {
> 	sgsnPDPRecord			[20] SGSNPDPRecord,
> 	sgsnMMRecord			[22] SGSNMMRecord,
> 
> Which isn't specified in the ASN1 description, should it have been record
> type 20? or what type of record is it supposed to be?

I just successfully decoded contents in Wireshark 1.8.10 as:
   GPRSCallEventRecord: ggsnPDPRecord (21)
     recordType: ggsnPDPRecord (19)

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