Hi Anders,
I ve tried to include the function "dissect_resetResource" and also gave
it a new tvb, but not much improvement. I have exported some messages in
the ranap.cnf file
like reset, initial ue etc.
The improved code :
ranap_tvb = tvb_new_real_data(buf,offset,offset);
tvb_set_child_real_data_tvbuff(tvb,ranap_tvb);
add_new_data_source(pinfo, ranap_tvb, "RANAP over XXX");
offset = dissect_initialUE_Message(ranap_tvb, offset, &actx, xxx_tree);
please see the difference b/w my test data and general ranap data. The
protocol ie s are too high a number in the test packet.
Ranap data in my test packet :
XXX
Protocol indicator: RANAP protocol (2)
RANAP Message type: initial UE (4)
Message length: 81
Information element identifier: RANAP initial UE message (32)
Information element length: 68
initialUE-Message
protocolIEs: 63385 items
Item 0
Item
Id: unknown ( 12856)
Criticality : reject (0)
[Malformed Packet: XXX]
General RANAP packet :
Radio Access Network Application Part
RANAP_PDU: initiatingMessage (0)
initiatingMessage
procedureCode: id-InitialUE-Message (19)
criticality: ignore (1)
initialUE-Message
protocolIEs: 6 items
Item 0
Item
id: id-CN-DomainIndicator (3)
criticality: ignore (1)
id-CN-DomainIndicator: cs-domain (0)
Item 1
Item
id: id-LAI (15)
criticality: ignore (1)
id-LAI
pLMNidentity: 42F099
Mobile Country Code (MCC): Sweden (240)
Mobile network code (MNC): 99
lAC: 012F
Item 2
........ so on
There is some mistake in either calling the function or allocation of
the buffer. Can you please help.
BR,
Tarani
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Anders Broman
Sent: Tuesday, January 22, 2008 10:59 PM
To: Developer support list for Wireshark
Subject: Re: [Wireshark-dev] Problems in calling a message from
RANAPdissector
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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