If Im not mistaken T124 is encoded with aligned PER while T125 is
BER so oyu also need to change the flags to asn2wrs to generate
a PER dissector.
You then also need to look at how other PER dissectors set whether it
is aligned or unaligned PER from the template file.
On Nov 24, 2007 8:26 PM, Stephen Fisher <stephentfisher@xxxxxxxxx> wrote:
> I'm stumbling through (is there a README somewhere?) trying to add my
> first ASN.1 based dissector (T.124 / Generic Conference Control) to
> Wireshark and I'm running into the following error. I mostly copied the
> asn1/t124 files from asn1/t125. This is another layer in a Microsoft
> Remote Desktop Protocol (RDP) session above t.125.
>
> sfisher@shadow:/usr/local/src/wireshark/asn1/t124>make generate_dissector
> python ../../tools/asn2wrs.py \
> -b -X -T \
> -p t124 \
> -c ./t124.cnf \
> -s ./packet-t124-template \
> -D . \
> GCC-PROTOCOL.asn
> ASN.1 to Wireshark dissector compiler
> Traceback (most recent call last):
> File "../../tools/asn2wrs.py", line 7671, in ?
> eth_main()
> File "../../tools/asn2wrs.py", line 7602, in eth_main
> ast.extend(yacc.parse(f.read(), lexer=lexer, debug=pd))
> File "/usr/local/src/wireshark/tools/yacc.py", line 346, in parse
> tok = self.errorfunc(errtoken)
> File "../../tools/asn2wrs.py", line 7455, in p_error
> raise ParseError(t, input_file)
> __main__.ParseError: GCC-PROTOCOL.asn:54: Unexpected token UniversalString('UniversalString')
> make: *** [packet-t124.c] Error 1
>
> Am I doing something wrong, or does it not like part of the .asn file?
>
> Also, how do I go about creating the t.124.cnf file? (My attempt above
> was using the t125.cnf file)
>
>
> Thanks,
>
> Steve
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