Wireshark-dev: Re: [Wireshark-dev] NBAP: dissection of Private Messages
Date: 29-Feb-2008 15:35:48 ZE5B

Hi,
I tried to add one sub-dissector table for private IEs, but the problem is that for private IEs the Protocol-IE-Id is a choice (having a local ID and a global ID) instead of string or integer.
So how to go about registering a new sub-dissector table??

static int dissect_PrivateIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_port(nbap_pies_dissector_table, PrivateIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}

can we use something like PrivateIE_ID.local ??

Thanks and Regards,
Praveen

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Re: [Wireshark-dev] NBAP: dissection of Private Messages

Hi,
There may not be a dissector table for private IE:s which in that case needs to be added. How much of the message
is decoded presently?
Regards
Anders

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Skickat: ti 2008-02-26 19:54
Till: Developer support list for Wireshark
Ämne: Re: [Wireshark-dev] NBAP: dissection of Private Messages



Hi,
"PrivateMessage" PDU is already defined in the NBAP spec, but it doesn't have any IEs currently.
I am adding IEs to it (PrivateMessage-IEs).


PrivateMessage-IEs NBAP-PRIVATE-IES ::= {

{ ID local:id-type-1 CRITICALITY criticality TYPE Sample-Message-Type PRESENCE optional} ,
...
}

Regards

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02/26/2008 06:09 PM



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Re: [Wireshark-dev] NBAP: dissection of Private Messages
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Hi,
Are you trying to add private PDU:s or Privare IE:s to a existing PDU?
Can you post a .pcap file of the message?

Regards
Anders


________________________________

From: [email protected] [mailto:[email protected]] On Behalf Of [email protected]
Sent: den 26 februari 2008 17:25
To: [email protected]
Subject: [Wireshark-dev] NBAP: dissection of Private Messages


Hi,
I am trying to implement the dissection of NBAP containing private message(s). For that I am including my private message
in asn1 format.
the message format is as follows :

-- ****************************************************************************************************************************
-- Private PDUs
-- ****************************************************************************************************************************

PrivateMessage-IEs NBAP-PRIVATE-IES ::= {
{ ID local:id-type-1 CRITICALITY criticality TYPE Sample-Message-Type PRESENCE optional} |
{ ID local:id-type-2 CRITICALITY criticality TYPE Sample-Message-Type PRESENCE optional} ,
...
}

Sample-Message-Type ::= CHOICE {
type-a value-a ,
type-b value-b
}

the above definition, I have added in NBAP-PDU-Containers.asn file.



--*******************************************************************************************************************************
--Private Constants
--*******************************************************************************************************************************
id-type-1 6000
id-type-2 7000
--*******************************************************************************************************************************
Added the constants in NBAP-Constants.asn file.

Apart from this I have also modified the CNF file,
In REGISTER_NEW added type-1, type-2 as IEs and, then type-a and type-b as IE-Extensions.

But the dissector is not able to dissect the Sample-Message-Type.
Any suggestions??

Regards,
Praveen Kumar Jha


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the individual to whom it is addressed. It may contain privileged or confidential information and should not be
circulated or used for any purpose other than for what it is intended. If you have received this message in error,
please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly
prohibited from using, copying, altering, or disclosing the contents of this message. Aricent accepts no responsibility for
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