Ethereal-users: Re: [Ethereal-users] Protocol GTP V1and GTP' for UMTS supported b y Ethereal?

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From: Guy Harris <gharris@xxxxxxxxx>
Date: Thu, 31 Jan 2002 03:44:42 -0800
On Thu, Jan 31, 2002 at 11:05:30AM -0000, Sandra Martinez wrote:
> thanks for your answer.
> I see that Ethereal supports GTP v0 and v1.
> The problem comes when our equipments send CDRs that are sent in ASN.1
> format.
> 
> This, we cannot decode because Ethereal doesn´t support ASN.1

You mean "Ethereal doesn't support dissecting CDRs that are sent in
ASN.1 format".  ASN.1 isn't a protocol, it's a way of describing the
syntax of protocols, so it makes no sense to say whether Ethereal
"supports ASN.1" in the abstract.  Ethereal dissects SNMP, Kerberos V5,
and LDAP, all of which use BER-encoded ASN.1.

It might be possible to have the GTP dissector use the ASN.1 routines in
Ethereal ("asn1.c" and "asn1.h") if the CDRs are encoded using BER.