Wireshark-dev: [Wireshark-dev] asn2wrs conformance TYPE_ATTR problem
From: Risto Paasila <[email protected]>
Date: Tue, 3 May 2011 11:13:35 +1000
Hi,

I have an issue with asn2wrs.

In the ASN file, I have for example this definition:

   correlationID [0] IMPLICIT OCTET STRING (SIZE(14))

This by default gets compiled into the following code:

    { &hf_ivrasn_correlationID,
      { "correlationID", "ivrasn.correlationID",
        FT_BYTES, BASE_NONE, NULL, 0,
        "OCTET_STRING_SIZE_14", HFILL }},

And of course when the data is displayed, the string is in hex.

I have added an entry in the conformance file, and the debug output of
the compiler shows the following :

# Conformance values
File            Line Table           Key                  Value
----------------------------------------------------------------------------------------------------
./myasn.cnf      11 PDU             MessageType          {'export':
False, 'new': False, 'hidden': False, 'need_decl':False, 'reg': None}
./myasn.cnf     131 TYPE_ATTR       OCTET_STRING_SIZE_14 {'TYPE':
'FT_STRING', 'DISPLAY': 'BASE_NONE'}
./myasn.cnf     128 TYPE_ATTR       correlationID        {'TYPE':
'FT_STRING', 'DISPLAY': 'BASE_NONE'}
./myasn.cnf     127 TYPE_ATTR       errorCode            {'TYPE':
'FT_INT32', 'DISPLAY': 'BASE_DEC', 'STRINGS': 'VALS(errorCodeNames)'}
./myasn.cnf     126 TYPE_ATTR       operationCode        {'TYPE':
'FT_INT32', 'DISPLAY': 'BASE_DEC', 'STRINGS':
'VALS(myOperationNames)'}
./myasn.cnf     130 TYPE_ATTR       uIScriptResult       {'TYPE':
'FT_STRING', 'DISPLAY': 'BASE_NONE'}
./myasn.cnf     129 TYPE_ATTR       uIScriptSpecificInformation
{'TYPE': 'FT_STRING', 'DISPLAY': 'BASE_NONE'}

However, it still does the default code generation, and the output is hex.

The generated code should be something like the following, so that the
dissector display is in ascii text:

    { &hf_myasn_correlationID,
      { "correlationID", "myasn.correlationID",
        FT_STRING, BASE_NONE, NULL, 0,
        "OCTET_STRING_SIZE_14", HFILL }},

So is there some other trick I may have missed?

Many thanks,
Risto