--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mingw-5.1.4/win32/include/ddk/pfhook.h	Fri Apr 03 17:16:45 2009 +0100
@@ -0,0 +1,76 @@
+/*
+ * pfhook.h
+ *
+ * Packet filter API
+ *
+ * This file is part of the w32api package.
+ *
+ * Contributors:
+ *   Created by Casper S. Hornstrup <chorns@users.sourceforge.net>
+ *
+ * THIS SOFTWARE IS NOT COPYRIGHTED
+ *
+ * This source code is offered for use in the public domain. You may
+ * use, modify or distribute it freely.
+ *
+ * This code is distributed in the hope that it will be useful but
+ * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
+ * DISCLAIMED. This includes but is not limited to warranties of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+#ifndef __PFHOOK_H
+#define __PFHOOK_H
+
+#if __GNUC__ >=3
+#pragma GCC system_header
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "ntddk.h"
+
+#define DD_IPFLTRDRVR_DEVICE_NAME         L"\\Device\\IPFILTERDRIVER"
+
+#define INVALID_PF_IF_INDEX               0xffffffff
+#define ZERO_PF_IP_ADDR                   0
+
+typedef ULONG IPAddr;
+
+typedef enum _PF_FORWARD_ACTION {
+	PF_FORWARD = 0,
+	PF_DROP = 1,
+	PF_PASS = 2,
+	PF_ICMP_ON_DROP = 3
+} PF_FORWARD_ACTION;
+
+typedef PF_FORWARD_ACTION STDCALL
+(*PacketFilterExtensionPtr)(
+  /*IN*/ unsigned char  *PacketHeader,
+  /*IN*/ unsigned char  *Packet, 
+  /*IN*/ unsigned int  PacketLength, 
+  /*IN*/ unsigned int  RecvInterfaceIndex, 
+  /*IN*/ unsigned int  SendInterfaceIndex, 
+  /*IN*/ IPAddr  RecvLinkNextHop, 
+  /*IN*/ IPAddr  SendLinkNextHop); 
+
+typedef struct _PF_SET_EXTENSION_HOOK_INFO {
+  PacketFilterExtensionPtr  ExtensionPointer; 
+} PF_SET_EXTENSION_HOOK_INFO, *PPF_SET_EXTENSION_HOOK_INFO;
+
+#define FSCTL_IPFLTRDRVR_BASE             FILE_DEVICE_NETWORK
+
+#define _IPFLTRDRVR_CTL_CODE(function, method, access) \
+  CTL_CODE(FSCTL_IPFLTRDRVR_BASE, function, method, access)
+
+#define IOCTL_PF_SET_EXTENSION_POINTER \
+  _IPFLTRDRVR_CTL_CODE(22, METHOD_BUFFERED, FILE_WRITE_ACCESS)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __PFHOOK_H */