Wireshark-dev: Re: [Wireshark-dev] Problems in calling a message from RANAP dissector
From: "Anders Broman" <[email protected]>
Date: Tue, 22 Jan 2008 18:28:47 +0100
Hi,
The principle is ok but you should probably use "dissect_ResetResource_PDU" and give it a new tvb with the RANAP data.
 
Possibly causes of the decoding problem dissect_ranap_ResetResource() may expect offset in bits and return bit_offset. The data given to dissect_ranap_ResetResource()
is not correct(including opcode etc perhaps?).
 
The .cnf file should be used to export functions.
Regards
Anders


From: [email protected] [mailto:[email protected]] On Behalf Of [email protected]
Sent: den 22 januari 2008 11:54
To: [email protected]
Subject: [Wireshark-dev] Problems in calling a message from RANAP dissector

Hi ,

 

I have my test dissector , running over SUA , in TLV ( tag length value) format. In one of the messages, I want to add an existing RANAP ( asn.1 format) message along with the other parameters of my protocol. The coding of one of the messages in which I have called RANAP message goes like this:

 

dissect_message(tvbuff_t *tvb,int offset ,proto_tree *xxx_tree,packet_info *pinfo)

 

{

 

asn1_ctx_t actx;

 

asn1_ctx_init(&actx, ASN1_ENC_PER, TRUE, pinfo);

offset = dissect_ranap_ResetResource(tvb, offset, &actx, macic_tree, hf_macic_ranap_resetResource);

 

proto_tree_add_item(xxx_tree, hf_xxx_clust,tvb, offset, en, FALSE);

offset = offset + len;

 

}

 

I have seen this way of implementation in MEGACO , trying to call a h245 message. But the RANAP message is not dissected properly and also I am not able to get the remaining parameters in the message. Could somebody confirm whether it is the right way to call a message from a different dissector.

 

BR,

Tarani

 

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