Wireshark-dev: Re: [Wireshark-dev] How can a TAP refer to external data ?

From: "Anders Broman" <a.broman@xxxxxxxxx>
Date: Tue, 31 Oct 2006 23:18:22 +0100

Have you added the corresponding lines to /epan/libwireshark.def ?
BR
Anders

-----Ursprungligt meddelande-----
Från: wireshark-dev-bounces@xxxxxxxxxxxxx
[mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] För Michael Lum
Skickat: den 31 oktober 2006 20:12
Till: 'Developer support list for Wireshark'
Ämne: [Wireshark-dev] How can a TAP refer to external data ?

Hello,

I am trying to modify the ansi_a_stat.c file.

I want the TAP to use an array of structures (ext_value_string_t below) from
the packet-ansi_a.c dissector.

In the TAP I have a pointer to the array.

During linking I get the following error:

Linking wireshark.exe
        link @C:\DOCUME~1\mlum.BC\LOCALS~1\Temp\nma04728.
libui.lib(ansi_a_stat.obj) : error LNK2001: unresolved external symbol
__imp__ansi_a_dtap_strings
libui.lib(ansi_a_stat.obj) : error LNK2001: unresolved external symbol
__imp__ansi_a_bsmap_strings wireshark.exe : fatal error LNK1120: 2
unresolved externals NMAKE : fatal error U1077: 'link' : return code '0x460'
Stop.

The definition of ansi_a_dtap_strings is as follows from
epan/dissectors/packet-ansi_a.h:

typedef struct ext_value_string_t
{
    guint32             value;
    const gchar         *strptr;
    guint32             dec_index;
}
ext_value_string_t;

WS_VAR_IMPORT const ext_value_string_t *ansi_a_bsmap_strings; WS_VAR_IMPORT
const ext_value_string_t *ansi_a_dtap_strings;

>From epan/dissectors/packet-ansi_a.c:

const ext_value_string_t *ansi_a_bsmap_strings = NULL; const
ext_value_string_t *ansi_a_dtap_strings = NULL;


The pointers are set in packet-ansi_a.c depending on a configuration
parameter, IOS version.

The previous version, which built and works correctly had the following
definition:

WS_VAR_IMPORT const value_string ansi_a_ios401_bsmap_strings[];


In the new code I have:

WS_VAR_IMPORT const value_string ansi_a_ios401_bsmap_strings[];
WS_VAR_IMPORT const value_string ansi_a_ios501_bsmap_strings[];

The pointer 'ansi_a_bsmap_strings' will be set to one of the above depending
on the current IOS version.


Thanks for your help.


Build environment:

Windows XP
Visual C++

--
Michael Lum                  Principal Software Engineer
4600 Jacombs Road            +1.604.276.0055
Richmond, B.C.
Canada V6V 3B1
UTStarcom Canada, Inc.
CDMA Division



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