70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
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/*++
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Copyright (c) 1999 Microsoft Corporation
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Module Name:
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pfhook.h
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Abstract:
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Header file for Packet Filter driver extension hook.
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--*/
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#ifndef _PF_EXTEND_DEFS_H_
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#define _PF_EXTEND_DEFS_H_
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#define INVALID_PF_IF_INDEX 0xffffffff
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#define ZERO_PF_IP_ADDR 0
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//
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// Enumeration constants for values that may be returned by an extension
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// routine.
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//
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typedef enum _PF_FORWARD_ACTION
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{
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PF_FORWARD = 0,
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PF_DROP = 1,
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PF_PASS = 2,
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PF_ICMP_ON_DROP = 3
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} PF_FORWARD_ACTION;
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//
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// Definiton for a filter routine callout.
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//
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typedef PF_FORWARD_ACTION (*PacketFilterExtensionPtr)(
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unsigned char *PacketHeader,
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unsigned char *Packet,
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unsigned int PacketLength,
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unsigned int RecvInterfaceIndex,
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unsigned int SendInterfaceIndex,
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IPAddr RecvLinkNextHop,
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IPAddr SendLinkNextHop
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);
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//
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// Structure to be passed to the IOCTL_PF_SET_EXTENSION_POINTER call
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//
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typedef struct _PF_SET_EXTENSION_HOOK_INFO
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{
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PacketFilterExtensionPtr ExtensionPointer;
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} PF_SET_EXTENSION_HOOK_INFO, *PPF_SET_EXTENSION_HOOK_INFO;
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#define DD_IPFLTRDRVR_DEVICE_NAME L"\\Device\\IPFILTERDRIVER"
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#define FSCTL_IPFLTRDRVR_BASE FILE_DEVICE_NETWORK
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#define _IPFLTRDRVR_CTL_CODE(function, method, access) \
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CTL_CODE(FSCTL_IPFLTRDRVR_BASE, function, method, access)
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#define IOCTL_PF_SET_EXTENSION_POINTER \
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_IPFLTRDRVR_CTL_CODE(22, METHOD_BUFFERED, FILE_WRITE_ACCESS)
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#endif // _PF_EXTEND_DEFS_H_
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