Re: Problems with regenerating lppe dissector

[Pascal Quantin <pascal.quantin () gmail com>]

2012/9/10 Pascal Quantin <pascal.quantin () gmail com>

> 2012/9/10 Jakub Zawadzki <darkjames-ws () darkjames pl>
>
> > Hi,
> >
> > I'm trying to regenerate packet-lppe.c from asn1/lppe using command:
> >   ../../tools/asn2wrs.py -p lppe -c ./lppe.cnf -s ./packet-lppe-template
> > -D . -O ../../epan/dissectors LPPe.asn
> >
> > Regenerated version doesn't compiles:
> >
> > ../../asn1/lppe/packet-lppe-fn.c:868:77: error: use of undeclared
> > identifier 'dissect_LPP_PDU_Definitions_GNSS_ID_Bitmap'
> >   { &hf_lppe_gnssTimeReference, ASN1_EXTENSION_ROOT    , ASN1_OPTIONAL
> >  , dissect_LPP_PDU_Definitions_GNSS_ID_Bitmap },
> > ../../asn1/lppe/packet-lppe-fn.c:1153:75: error: use of undeclared
> > identifier 'dissect_LPP_PDU_Definitions_GNSS_ID'
> >   { &hf_lppe_gnss_ID        , ASN1_EXTENSION_ROOT    , ASN1_NOT_OPTIONAL,
> > dissect_LPP_PDU_Definitions_GNSS_ID },
> > ...
> >
> > Looking at diff, I have lot of identifier renames, like:
> > -  { &hf_lppe_gnssTimeReference, ASN1_EXTENSION_ROOT    , ASN1_OPTIONAL
> >  , dissect_lpp_GNSS_ID_Bitmap },
> > +  { &hf_lppe_gnssTimeReference, ASN1_EXTENSION_ROOT    , ASN1_OPTIONAL
> >  , dissect_LPP_PDU_Definitions_GNSS_ID_Bitmap },
> > -  { &hf_lppe_ccpAssistanceSuppport, ASN1_EXTENSION_ROOT    ,
> > ASN1_OPTIONAL    , dissect_lpp_GNSS_SignalIDs },
> > +  { &hf_lppe_ccpAssistanceSuppport, ASN1_EXTENSION_ROOT    ,
> > ASN1_OPTIONAL    , dissect_LPP_PDU_Definitions_GNSS_SignalIDs },
> > ...
> >
> > and hf types changes:
> >        { "eARFCN", "lppe.eARFCN",
> > -        FT_UINT32, BASE_DEC, NULL, 0,
> > +        FT_NONE, BASE_NONE, NULL, 0,
> >        { "dl-CarrierFreq", "lppe.dl_CarrierFreq",
> > -        FT_UINT32, BASE_DEC, NULL, 0,
> > +        FT_NONE, BASE_NONE, NULL, 0,
> > ...
> >
> > I really need to change only one line:
> >
> > -static int dissect_OMA_LPPe_MessageExtension_PDU(tvbuff_t *tvb _U_,
> > packet_info *pinfo _U_, proto_tree *tree _U_) {
> > +static int dissect_OMA_LPPe_MessageExtension_PDU(tvbuff_t *tvb _U_,
> > packet_info *pinfo _U_, proto_tree *tree _U_, void *data _U_) {
> >
> > So I'll commit only this line change, but it'd be great if someone could
> > look at it.
>
> Hi Jakub,
>
> I'll take care of it later today (as I added both LPP and LPPe dissectors
> to the tree, I hope I will be able to figure out what's happening ;) ).
>
> Regards,
> Pascal.

Hi Jakub,

LPPe dissector has a dependency to LPP dissector. To generate it, you must
first generate lpp-exp.cnf file. This is handled in the Makefile.common
file found in asn1/lppe:

EXTRA_CNF = \
    $(builddir)/../lpp/lpp-exp.cnf

$(builddir)/../lpp/lpp-exp.cnf:
    (cd $(builddir)/../lpp && $(MAKE_CNF_EXPORT))

Using make instead of executing the asn2wrs.py script directly should allow
you to generate the dissector without errors.

Regards,
Pascal.

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