mingw/include/ddk/pfhook.h

   1 /*
   2  * pfhook.h
   3  *
   4  * Packet filter API
   5  *
   6  * This file is part of the w32api package.
   7  *
   8  * Contributors:
   9  *   Created by Casper S. Hornstrup <chorns@users.sourceforge.net>
  10  *
  11  * THIS SOFTWARE IS NOT COPYRIGHTED
  12  *
  13  * This source code is offered for use in the public domain. You may
  14  * use, modify or distribute it freely.
  15  *
  16  * This code is distributed in the hope that it will be useful but
  17  * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
  18  * DISCLAIMED. This includes but is not limited to warranties of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  20  *
  21  */
  22
  23 #ifndef __PFHOOK_H
  24 #define __PFHOOK_H
  25
  26 #if __GNUC__ >=3
  27 #pragma GCC system_header
  28 #endif
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 #include "ntddk.h"
  35
  36 #define DD_IPFLTRDRVR_DEVICE_NAME         L"\\Device\\IPFILTERDRIVER"
  37
  38 #define INVALID_PF_IF_INDEX               0xffffffff
  39 #define ZERO_PF_IP_ADDR                   0
  40
  41 typedef ULONG IPAddr;
  42
  43 typedef enum _PF_FORWARD_ACTION {
  44         PF_FORWARD = 0,
  45         PF_DROP = 1,
  46         PF_PASS = 2,
  47         PF_ICMP_ON_DROP = 3
  48 } PF_FORWARD_ACTION;
  49
  50 typedef PF_FORWARD_ACTION STDCALL
  51 (*PacketFilterExtensionPtr)(
  52   /*IN*/ unsigned char  *PacketHeader,
  53   /*IN*/ unsigned char  *Packet,
  54   /*IN*/ unsigned int  PacketLength,
  55   /*IN*/ unsigned int  RecvInterfaceIndex,
  56   /*IN*/ unsigned int  SendInterfaceIndex,
  57   /*IN*/ IPAddr  RecvLinkNextHop,
  58   /*IN*/ IPAddr  SendLinkNextHop);
  59
  60 typedef struct _PF_SET_EXTENSION_HOOK_INFO {
  61   PacketFilterExtensionPtr  ExtensionPointer;
  62 } PF_SET_EXTENSION_HOOK_INFO, *PPF_SET_EXTENSION_HOOK_INFO;
  63
  64 #define FSCTL_IPFLTRDRVR_BASE             FILE_DEVICE_NETWORK
  65
  66 #define _IPFLTRDRVR_CTL_CODE(function, method, access) \
  67   CTL_CODE(FSCTL_IPFLTRDRVR_BASE, function, method, access)
  68
  69 #define IOCTL_PF_SET_EXTENSION_POINTER \
  70   _IPFLTRDRVR_CTL_CODE(22, METHOD_BUFFERED, FILE_WRITE_ACCESS)
  71
  72 #ifdef __cplusplus
  73 }
  74 #endif
  75
  76 #endif /* __PFHOOK_H */