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