CODEWITHSUNDEEP
cwindowslinker-errorswindows-kernelwfp
wow
wow

Reputation: 3899

Windows Filtering Platform - Unresolved External Symbols

I have writing a Windows Filtering Platform (WFP) kernel driver and I am trying to add some callouts.

I am using some FWPM_LAYER GUIDs, such as

FWPM_LAYER_OUTBOUND_TRANSPORT_V4
FWPM_LAYER_OUTBOUND_TRANSPORT_V6
FWPM_LAYER_ALE_AUTH_CONNECT_V4
FWPM_LAYER_ALE_AUTH_CONNECT_V6

However I am getting unresolved external symbols when using these.

Error   LNK2001 unresolved external symbol _FWPM_LAYER_OUTBOUND_TRANSPORT_V4
Error   LNK2001 unresolved external symbol _FWPM_LAYER_OUTBOUND_TRANSPORT_V6
Error   LNK2001 unresolved external symbol _FWPM_LAYER_ALE_AUTH_CONNECT_V4
Error   LNK2001 unresolved external symbol _FWPM_LAYER_ALE_AUTH_CONNECT_V6

I am using the following headers

#define NDIS61 1

#include <ntifs.h>
#include <ntddk.h>
#include <wdf.h>

#pragma warning(push)
#pragma warning(disable: 4201)
#include <fwpsk.h>
#pragma warning(pop)

#include <fwpmk.h>
#include <fwpvi.h>
#include <guiddef.h>
#include <initguid.h>
#include <devguid.h>

And I am linking against the following additional dependencies.

$(DDK_LIB_PATH)wdmsec.lib
$(DDK_LIB_PATH)fwpkclnt.lib

I am unable to find what I am missing, it appears that those GUIDs are located within fwmpk.h which is in the Fwpkclnt.lib library, which I am building against.

Upvotes: 1

Views: 937

Answers (1)

wow
wow

Reputation: 3899

As answered by RbMm in the comments, the solution was to move the #include <initguid.h> statement before the include <fwmpk.h> statement.

#define NDIS61 1

#include <ntifs.h>
#include <ntddk.h>
#include <wdf.h>

#include <guiddef.h>
#include <initguid.h>
#include <devguid.h>

#pragma warning(push)
#pragma warning(disable: 4201)
#include <fwpsk.h>
#pragma warning(pop)

#include <fwpmk.h>
#include <fwpvi.h>

Upvotes: 1

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