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

["Anders Broman" <a.broman@xxxxxxxxx>]

Hi,
Well are you using local Id for your private IE:s?
I guess you need to add code to the CHOICE to know whether it’s a global or
local code received.
Then in dissect_PrivateIEFieldValue bransch on that to either call a OID
subdissector or the local PrivateIE_ID
Dissector this can be done in the same way as for the "normal" ie dissector
Add after:
  nbap_ies_dissector_table = register_dissector_table("nbap.ies",
"NBAP-PROTOCOL-IES", FT_UINT32, BASE_DEC);
  nbap_private_ies_dissector_table =
register_dissector_table("nbap.private.ies", "NBAP-PRIVARE-PROTOCOL-IES",
FT_UINT32, BASE_DEC);

Please send us a diff of the code you added as this can be added to the
standard dissector. (Registration to the table can be kept private).
Regards
Anders

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[mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] För praveen.jha@xxxxxxxxxxx
Skickat: den 29 februari 2008 16:36
Till: Developer support list for Wireshark
Ämne: Re: [Wireshark-dev] NBAP: dissection of Private Messages

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

"Anders Broman" <anders.broman@xxxxxxxxxxxx>

"Anders Broman" <anders.broman@xxxxxxxxxxxx> 
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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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Från: wireshark-dev-bounces@xxxxxxxxxxxxx genom praveen.jha@xxxxxxxxxxx
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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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: wireshark-dev-bounces@xxxxxxxxxxxxx
[mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of
praveen.jha@xxxxxxxxxxx
Sent: den 26 februari 2008 17:25
To: wireshark-dev@xxxxxxxxxxxxx
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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you have received this message in error, 
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for the use of 
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 
loss or damage arising from the use of the information transmitted by this
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