Wireshark-dev: Re: [Wireshark-dev] local operation code in MAP
Date: Tue, 27 Feb 2007 16:01:30 +0100
Right, I did check the encoding of an integer value:
Integer Value Ber Encoding
0 02 01 00
127 02 01 7F
128 02 02 00 80
256 02 02 01 00
-128 02 01 80
Regards
Florent
<durgabhavani.uppuluru@w
ipro.com> To: <wireshark-dev@xxxxxxxxxxxxx>
Sent by: cc:
wireshark-dev-bounces@wi Subject: Re: [Wireshark-dev] local operation code in MAP
reshark.org
27/02/2007 15:46
Please respond to
Developer support list
for Wireshark
Hi,
I've made the following changes in the packet:
opcode length : 2 bytes
opcode value : 00 99.
It works.
Thanks a lot for your help.
Regards,
Bhavani.
From: DurgaBhavani Uppuluru
Sent: Tuesday, February 27, 2007 7:44 PM
To: 'wireshark-dev@xxxxxxxxxxxxx'
Subject: RE: local operation code in MAP
Hi,
I've given the value for operation code, not the ASN1 compiler.
I've tried below suggestion but still got the problem.
Operation code length : 02, and the operation code : H'81 H'99.
I tried to print the opcode value read from dissect_ber_integer,
dissect_ber_integer64
They print negative number for int format & huge positive number for
unsigned format.
Best Regards,
Bhavani.
From: Florent.Drouin@xxxxxxxxxxxxxxxxx
Date: Tue, 27 Feb 2007 13:05:42 +0100
Hi,
You said:
"Hex value shown, in the bytes pane is 99."
Is this value field by yourself, or by an ASN1 compiler ?
I think, It could be a problem of long form encoding.
Could you try to use H'81 H'99 instead of H'99 for the operation code in
the message to decode ?
Regards
Florent
From: DurgaBhavani Uppuluru
Sent: Tuesday, February 27, 2007 12:08 PM
To: 'wireshark-dev@xxxxxxxxxxxxx'
Subject: RE: local operation code in MAP
Hi Again,
I've tried latest svn version files too, still I get the same problem.
I've added gsmmap, ranap directories & packet-gtp.c from svn Revision
20934, on top of wireshark-0.99.5 sources.
Please help me.
Best Regards,
Bhavani.
From: DurgaBhavani Uppuluru
Sent: Tuesday, February 27, 2007 9:41 AM
To: 'wireshark-dev@xxxxxxxxxxxxx'
Subject: RE: local operation code in MAP
Hi,
I'm using wireshark 0.99.5 sources.
The below code is right.
I've added the operations in the same way.
Here are the steps followed:
My GSMMAP.asn files looks
1. OperationLocalvalue ::= INTEGER{
updateLocation (2),
:
noteMM-Event (89),
operation1(152),
operation2(153)
}
2. Operation descriptions of operation1 & operation2 are added
3. packet-gsm_map-template.c is updated with
gsm_map_opr_code_strings[]={
{ 2, "updateLocation" },
:
{ 152, "operation1" },
{ 153, "operation2" }
}
dissect_invokeData()
switch(opcode){
case 2: /*updateLocation*/ dissect_gsm_map_UpdateLocationArg(); break;
:
case 152: /*operation 1*/ dissect_gsm_map_Operation1Arg(); break;
case 153: /*operation 2*/ dissect_gsm_map_Operation2Arg(); break;
}
return offset;
}
3. makefile is used to generate packet-gsm_map.c, packet-gsm_map.h.
Options used with asn2wrs are:
python ../../tools/asn2wrs.py -b -e -p gsm_map -c gsmmap.cnf -s
packet-gsm_map-template GSMMAP.asn
4. Generated packet-gsm_map.c, packet-gsm_map.h are copied to
../../epan/dissectors folder.
Standard makefile present in the wireshark-0.99.5 directory is used to
build the wireshark exe.
The same steps when followed with operation codes with 90,91 or 94,95 work
fine.
Thanks for your time.
Best Regards,
Bhavani.
From: "Anders Broman \(AL/EAB\)" <anders.broman@xxxxxxxxxxxx>
Date: Mon, 26 Feb 2007 16:21:09 +0100
Hi,
Are you running the latest SVN version of Wireshark?
I asume that "adding an operation with local value 153 to GSMMAP" means
that you are editing the sources,
what happens if you change:
GSMMAPOperationLocalvalue ::= INTEGER{
updateLocation (2),
:
noteMM-Event (89)
}
To:
noteMM-Event (89),
your-string(153)
}
in GSMMAP.asn and rebuild the dissector using asn2wrs?
Best regards
Anders
From: DurgaBhavani Uppuluru
Sent: Monday, February 26, 2007 10:46 AM
To: 'wireshark-dev@xxxxxxxxxxxxx'
Subject: RE: local operation code in MAP
Hi Anders,
Hex value shown, in the bytes pane is 99.
I've tried other numbers too (>150) and I get similar result.
Best Regards,
Bhavani.
From: "Anders Broman" <a.broman@xxxxxxxxx>
Date: Sun, 25 Feb 2007 19:55:43 +0100
Hi,
What is the hex value shown in the bytes pane when marking localvalue in
the
middle pane?
Best regards
Anders
From: DurgaBhavani Uppuluru
Sent: Sunday, February 25, 2007 2:36 PM
To: 'wireshark-dev@xxxxxxxxxxxxx'
Subject: local operation code in MAP
Hi All,
Greetings to you.
I'm adding an operation with local value 153 to GSMMAP.
But dissector does not recognize 153, it reports Unknown -103.
Kindly tell me how to set this value.
Thanks,
Bhavani.
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