Wireshark-dev: Re: [Wireshark-dev] Compilation error in asn.1 file
Date: Tue, 8 Jan 2008 09:03:31 +0530
Thanx a ton Anders....I ll have to slightly modify the code now..


> -----Original Message-----
> From: [email protected] [mailto:wireshark-dev-
> [email protected]] On Behalf Of Anders Broman
> Sent: Friday, January 04, 2008 3:48 PM
> To: 'Developer support list for Wireshark'
> Subject: Re: [Wireshark-dev] Compilation error in asn.1 file
>
> Hi,
> Here's an example Trace from
>  http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2154 the first frame
> starting from the (ANSI)TCAP layer
>
>
> ANSI Transaction Capabilities Application Part
>     11.. .... = Class: PRIVATE (3)
>     ..1. .... = P/C: Constructed Encoding
>     ...0 0010 = Tag: 2
>     Length: 144
>     queryWithPerm
>         11.. .... = Class: PRIVATE (3)
>         ..0. .... = P/C: Primitive Encoding
>         ...0 0111 = Tag: 7
>         Length: 4
>         identifier: 5A003021
>         11.. .... = Class: PRIVATE (3)
>         ..1. .... = P/C: Constructed Encoding
>         ...0 1000 = Tag: 8
>         Length: 135
>         componentPortion: 1 item
>             11.. .... = Class: PRIVATE (3)
>             ..1. .... = P/C: Constructed Encoding
>             ...0 1001 = Tag: 9
>             Length: 132
>             Item: invokeLast (9)
>                 invokeLast
>                     11.. .... = Class: PRIVATE (3)
>                     ..0. .... = P/C: Primitive Encoding
>                     ...0 1111 = Tag: 15
>                     Length: 1
>                     componentIDs: 00
>                     11.. .... = Class: PRIVATE (3)
>                     ..0. .... = P/C: Primitive Encoding
>                     ...1 0001 = Tag: 17
>                     Length: 2
>                     operationCode: private (17)
>                         private: 2351 Origination Request
>                     parameter:
> F27B81071050034E40E50084090100210A39999689608904...
> ANSI Mobile Application Part
>     11.. .... = Class: PRIVATE (3)
>     ..1. .... = P/C: Constructed Encoding
>     ...1 0010 = Tag: 18
>     Length: 123
>     originationRequest
>         10.. .... = Class: CONTEXT (2)
>         ..0. .... = P/C: Primitive Encoding
>         ...0 0001 = Tag: 1
>         Length: 7
>         billingID: 1050034E40E500
>             MarketID: 4176
>             Switch Number (SWNO): 3
>             ID Number: 5128421
>             Segment Counter: 0
>
> 0010                       e2 81 90 c7 04 5a 00 30 21   ............Z.0!
> 0020  e8 81 87 e9 81 84 cf 01 00 d1 02 09 2f f2 7b 81   ............/.{.
> 0030  07 10 50 03 4e 40 e5 00 84 09 01 00 21 0a 39 99   [email protected]!.9.
> 0040  96 89 60 89 04 36 0f e7 74 95 03 10 50 03 9f 62   ..`..6..t...P..b
> 0050  04 00 00 00 00 9f 7b 02 04 51 9f 20 05 01 19 2e   ......{..Q. ....
> 0060  02 08 bf 82 18 0c 9f 82 19 01 03 9f 82 15 03 ff   ................
> 0070  fb 1f 9f 21 02 a2 02 88 05 87 77 71 48 22 9f 5d   ...!......wqH".]
> 0080  09 06 30 21 0a 87 67 04 36 75 82 02 02 a2 9f 50   ..0!..g.6u.....P
> 0090  09 02 30 21 0a 87 67 04 36 75 9f 81 13 01 00 9f   ..0!..g.6u......
> 00a0  82 17 01 24 d0 04 21 10 50 03                     ...$..!.P.
>
> As you can see the
>                     operationCode: private (17)
>                         private: 2351 Origination Request
>                     parameter:
> F27B81071050034E40E50084090100210A39999689608904...
>
> OperationCode is part of TCAP and the message on top of TCAP is the
> Parameter. The ANSI TCAP dissector has to somehow hand the Parameter
> And the opcode to a subdissector.
> In this TCAP message the only thing "identifying" the upper layer is
> The SCCP address and possibly the private opcode.
>  If you look at Wireshark/asn/ansi-tcap/TCAPPackage.asn there
> Can be a dialogue portion which will identify the receiver of the data.
> So how you are going to find the sub dissector in your case depends on how
> The TCAP part will look.
> The content of the parameter would be your xxArg or xxRes pointed to by
> the
> Opcode.
> Hope this helps.
> Note that as the ANSI TCAP dissector currently only has one sub dissector
> (
> ansi map) the code to find the subdissector is simplified.
> Regards
> Anders
>
>
> -----Ursprungligt meddelande-----
> Från: [email protected]
> [mailto:[email protected]] För
> [email protected]
> Skickat: den 4 januari 2008 04:40
> Till: [email protected]
> Ämne: Re: [Wireshark-dev] Compilation error in asn.1 file
>
> Hi Anders,
>
> I am sorry , I don't have any trace of the protocol. It s still in the
> development phase. That is the reason we are facing so many issues.
>
> We have gone through inap , gsmmap and ansi_map code and implemented in
> the
> following manner:
>
> static void
> dissect_xxx(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree){
>
>         int offset = 0;
>         static guint32 opcode=0;
>         proto_item *item=NULL;
>         proto_tree *tree=NULL;
>
>         if(tree){
>                 item = proto_tree_add_item(tree, proto_xxx, tvb, 0, -1,
> FALSE);
>                 tree = proto_item_add_subtree(item, ett_xxx);
>         }
>         if (check_col(pinfo->cinfo, COL_PROTOCOL))
>                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "XXX");
>         if (check_col(pinfo->cinfo, COL_INFO))
>                 col_clear(pinfo->cinfo, COL_INFO);
>
> static int
> dissect_xxx_Opcode(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset,
> packet_info *pinfo _U_, proto_tree *tree, int hf_index) {
>  offset = dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_index,
> &opcode);
>
>   if (check_col(pinfo->cinfo, COL_INFO)){
>     col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(opcode,
> inap_opr_code_strings, "Unknown XXX (%u)"));
>   }
>
> }
>         switch(opcode){
>
>         case 0 :
>                 offset = dissect_xxx_Arg();
>                 offset = dissect_xxx_Res();
>         break;
>
> I suppose dissect_ber_integer() function will give the value of the
> opcode.
> Could you please confirm the above implementation?
>
>
> BR,
> Tarani
>
> > -----Original Message-----
> > From: [email protected] [mailto:wireshark-dev-
> > [email protected]] On Behalf Of Anders Broman
> > Sent: Thursday, January 03, 2008 4:35 PM
> > To: 'Developer support list for Wireshark'
> > Subject: Re: [Wireshark-dev] Compilation error in asn.1 file
> >
> > Hi,
> > - Have you got a trace with your protocol?
> > - Is it ANSI TCAP?
> > If you look at the trace with Wireshark the trace is decoded to the ANSI
> > TCAP layer including operation code - right?
> > If so you need some code in the ANSI TCAP dissector to call your
> dissector
> > How that should be done depends on the content of the ANSI TCAP layer...
> > Could you post a sample packet of the establishment phase?
> > Regards
> > Anders
> >
> > -----Ursprungligt meddelande-----
> > Från: [email protected]
> > [mailto:[email protected]] För
> > [email protected]
> > Skickat: den 3 januari 2008 11:51
> > Till: [email protected]
> > Ämne: Re: [Wireshark-dev] Compilation error in asn.1 file
> >
> >
> > Hi Anders,
> >
> > I was able to compile my asn successfully. There are three different
> > opcodes
> > mentioned for three different operations. Each operation contains an
> > argument / parameter part and a result. As you have rightly said, I have
> > to
> > call my Argument methods ( dissect_xxxArg) and result methods(
> > dissect_xxxRes) in the template.c file. Now I am facing some problems
> > here:
> >
> > 1. Switch(opcode){
> > 	Case xxx:
> > 	Dissect_xxxArg();
> > 	Break;
> > Here, how am I supposed to capture the value of the opcode. In normal
> > dissection, we simply use the function tvb_get_guint8(tvb, offset).
> > I have looked at ansi_map code , but the implementation seems a bit
> > complicated.
> >
> > 2. I have referred ITU Q.773 for OPERATION class.I am not sure what
> > modules
> > I should include for my asn i.e before DEFINITIONS. This is the link I
> ve
> > looked into.
> > http://www.itu.int/ITU-T/asn1/database/itu-t/q/q773/1997/index.html
> >
> > BR,
> > Tarani
> >
> > > -----Original Message-----
> > > From: [email protected] [mailto:wireshark-dev-
> > > [email protected]] On Behalf Of Anders Broman
> > > Sent: Wednesday, December 26, 2007 4:46 PM
> > > To: 'Developer support list for Wireshark'
> > > Subject: Re: [Wireshark-dev] Compilation error in asn.1 file
> > >
> > > Hi,
> > > Ok I think I remember now you are dealing with ANSI TCAP stuff -
> right?
> > > And you are hand writing the asn1 file?
> > >
> > > I don't think asn2wrs can handle "ANSI OPERATIONS" in theory you
> should
> > > IMPORT OPERATIONS like:
> > >
> > > IMPORTS
> > > 	OPERATION
> > > FROM TCAP-Remote-Operations-Information-Objects {iso(1)memberbody(2)
> > > usa(840) t1-114(10013)
> > > 	modules(0) informationObjects(1) version4(4) }
> > >
> > > And that asn1 file should be compiled with your asn1 file or you could
> > > Declare the OPERATION class in our .cnf file.
> > >
> > > However if you just define the parameters in the asn1 file like:
> > >
> > > xxxRequest ::= SEQUENCE {
> > >
> > > aaa (2) AAA,
> > >
> > > bbb (3) BBB }
> > >
> > > xxxResult ::=
> > >
> > > (see ANSI MAP)
> > >
> > > Then in your template file you'll have to make the connection from
> > > operation
> > > code to xxxRequest.
> > > Switch(code){
> > >  Case xxx:
> > > 	Dissect_xxxRequest();
> > > 	Break;
> > > }
> > > A bit more complicated to get it called from ANSI TCAP but that
> depends
> > on
> > > How the ANSI TCAP bit looks in your case...
> > >
> > > Regards
> > > Anders
> > >
> > > -----Ursprungligt meddelande-----
> > > Från: [email protected]
> > > [mailto:[email protected]] För
> > > [email protected]
> > > Skickat: den 26 december 2007 11:20
> > > Till: [email protected]
> > > Ämne: Re: [Wireshark-dev] Compilation error in asn.1 file
> > >
> > >
> > > Hi ,
> > >
> > > Let me explain you in detail. I have a protocol defined in asn.1
> format
> > ,
> > > whose operations and parameters look like the ones mentioned below:
> > >
> > > Operation Code=1
> > >
> > > Class=1
> > >
> > > ASN.1 Formal Description
> > >
> > > xxxRequest ::= OPERATION
> > >
> > > PARAMETER SEQUENCE {
> > >
> > > aaa (2) AAA,
> > >
> > > bbb (3) BBB }
> > >
> > > RESULT
> > >
> > > reqresult (4) ReqResult
> > >
> > > Parameters :
> > >
> > > xxx ::= ENUMERATED {
> > >
> > > xxxNotActive (0),
> > >
> > > xxxActive (1) }
> > >
> > > I have copied these exactly to generate my .asn file . I am still
> having
> > > hiccups in generating the .cnf file. But the code is not getting
> > compiled
> > > and it is giving error at each line of the .asn file.
> > >
> > > BR.
> > > Tarani
> > >
> > >
> > > > -----Original Message-----
> > > > From: [email protected] [mailto:wireshark-dev-
> > > > [email protected]] On Behalf Of Anders Broman
> > > > Sent: Tuesday, December 25, 2007 5:20 PM
> > > > To: 'Developer support list for Wireshark'
> > > > Subject: Re: [Wireshark-dev] Compilation error in asn.1 file
> > > >
> > > > Hi,
> > > > OPERATION is not a predefined asn1 type, in GSM MAP operation is
> from:
> > > >
> > > > :
> > > > IMPORTS
> > > > 	OPERATION
> > > > FROM Remote-Operations-Information-Objects {
> > > > joint-iso-itu-t remote-operations(4)
> > > >   informationObjects(5) version1(0)}
> > > > :
> > > >
> > > > And is used as:
> > > > sendRoutingInfo  OPERATION ::= {				--Timer m
> > > > -- The timer is set to the upper limit of the range if the GMSC
> > supports
> > > > pre-paging.
> > > > 	ARGUMENT
> > > > 		SendRoutingInfoArg
> > > > 	RESULT
> > > > 		SendRoutingInfoRes
> > > > 	ERRORS {
> > > > 		systemFailure |
> > > > :
> > > > I'm not sure what you are trying to achieve...
> > > > Regards
> > > > Anders
> > > >
> > > > ________________________________________
> > > > Från: [email protected]
> > > > [mailto:[email protected]] För
> > > > [email protected]
> > > > Skickat: den 24 december 2007 11:46
> > > > Till: [email protected]
> > > > Ämne: Re: [Wireshark-dev] Compilation error in asn.1 file
> > > >
> > > > Hi ,
> > > >
> > > > There has to be a PDU added before DEFINITIONS in the .asn file. I
> > don't
> > > > have it but used it from existing asn files, though it is different
> > for
> > > > each
> > > > file.
> > > >
> > > > After that I am getting the following error:
> > > >
> > > > __main__.ParseError: LexToken(ASSIGNMENT,'::=',1,468)
> > > >
> > > > I think it is giving a problem at the following assingnment :
> > > >
> > > > XXX ::= OPERATION
> > > >
> > > > Here , I want to know whether the keyword OPERATION is in the
> standard
> > > > asn.1
> > > > notation , or some changes are required here?
> > > >
> > > > //Tarani
> > > >
> > > > ________________________________________
> > > > From: [email protected]
> > > > [mailto:[email protected]] On Behalf Of Anders
> > Broman
> > > > Sent: Monday, December 24, 2007 3:52 PM
> > > > To: 'Developer support list for Wireshark'
> > > > Subject: Re: [Wireshark-dev] Compilation error in asn.1 file
> > > >
> > > > Hi,
> > > > >tsrp.cnf:65: UserWarning: Duplicated FN_PARS for Command. Previous
> > one
> > > is
> > > > at tsrp.cnf:57
> > > >
> > > > Is a problem in the .cnf file
> > > >
> > > > >__main__.ParseError: LexToken(DEFINITIONS,'DEFINITIONS',1,199)
> > > > Is a problem in the .asn file Line 199?
> > > > Regards
> > > > Anders
> > > >
> > > > ________________________________________
> > > > Från: [email protected]
> > > > [mailto:[email protected]] För
> > > > [email protected]
> > > > Skickat: den 24 december 2007 06:38
> > > > Till: [email protected]
> > > > Ämne: [Wireshark-dev] Compilation error in asn.1 file
> > > >
> > > > Hi ,
> > > >
> > > > I have written .asn and  .cnf files for my dissector. I have created
> a
> > > > nominal template.c and template .h files as I suppose the asn2wrs
> > > compiler
> > > > would generate the functions and declarations. I also suppose I
> should
> > > add
> > > > the variable declarations and function definitions after the
> > > compilation.
> > > >
> > > > I am getting the following error while compiling :
> > > >
> > > > python ../../tools/asn2wrs.py -b -e -p tsrp -c tsrp.cnf -s
> > > > packet-tsrp-template tsrp.asn
> > > > ASN.1 to Wireshark dissector compiler
> > > > tsrp.cnf:65: UserWarning: Duplicated FN_PARS for Command. Previous
> one
> > > is
> > > > at
> > > > tsrp.cnf:57
> > > >   #.FN_BODY  Command Result VAL_PTR = &parameter_tvb
> > > > Traceback (most recent call last):
> > > >   File "../../tools/asn2wrs.py", line 4875, in ?
> > > >     eth_main()
> > > >   File "../../tools/asn2wrs.py", line 4831, in eth_main
> > > >     ast.extend(yacc.parse(f.read(), lexer=lexer, debug=pd))
> > > >   File
> "/home/eth/plugin_dev/wireshark_tsrp/wireshark/tools/yacc.py",
> > > line
> > > > 334, in parse
> > > >     tok = self.errorfunc(errtoken)
> > > >   File "../../tools/asn2wrs.py", line 4705, in p_error
> > > >     raise ParseError(str(t))
> > > > __main__.ParseError: LexToken(DEFINITIONS,'DEFINITIONS',1,199)
> > > > make: *** [packet-tsrp.c] Error 1
> > > >
> > > > I am not sure the error is pertaining to .asn, .cnf or the template
> > > > files.Can somebody please help.
> > > >
> > > > BR,
> > > > Tarani
> > > >
> > > > _______________________________________________
> > > > Wireshark-dev mailing list
> > > > [email protected]
> > > > http://www.wireshark.org/mailman/listinfo/wireshark-dev
> > >
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