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/********************************************************************/
/** Microsoft LAN Manager **/
/** Copyright(c) Microsoft Corp., 1990-1995 **/
/********************************************************************/
/* :ts=4 */
//*** ipfilter.h - IP filterng and demand dial header file.
//
// Contains definitions for constants and prototypes related to IP filtering and
// dial on demand support.
#ifndef IPFILTER_INCLUDED
#define IPFILTER_INCLUDED
#include <ipexport.h>
#define RESERVED_IF_INDEX 0xffffffff // The reserved inteface index.
#define INVALID_IF_INDEX 0xffffffff // The invalid inteface index.
typedef void *ROUTE_CONTEXT; // Context in an unattached route.
typedef void *INTERFACE_CONTEXT; // Context in an inteface
// Enum for values that may be returned from filter routine.
typedef enum _FORWARD_ACTION
{
FORWARD = 0,
DROP = 1
} FORWARD_ACTION;
// Definition for pointer to callout that maps a route to an interface.
typedef unsigned int (*IPMapRouteToInterfacePtr)(ROUTE_CONTEXT Context,
IPAddr Destination, IPAddr Source, unsigned char Protocol,
unsigned char *Buffer, unsigned int Length);
// Definiton for a filter routine callout.
typedef FORWARD_ACTION (*IPPacketFilterPtr)(
struct IPHeader UNALIGNED *PacketHeader,
unsigned char *Packet,
unsigned int PacketLength,
INTERFACE_CONTEXT RecvIntefaceContext,
INTERFACE_CONTEXT SendInterfaceContext);
// Structure passed to the IPSetInterfaceContext call.
typedef struct _IP_SET_IF_CONTEXT_INFO {
unsigned int Index; // Inteface index for i/f to be set.
INTERFACE_CONTEXT *Context; // Context for inteface.
} IP_SET_IF_CONTEXT_INFO, *PIP_SET_IF_CONTEXT_INFO;
// Structure passed to the IPSetFilterHook call
typedef struct _IP_SET_FILTER_HOOK_INFO {
IPPacketFilterPtr FilterPtr; // Packet filter callout.
} IP_SET_FILTER_HOOK_INFO, *PIP_SET_FILTER_HOOK_INFO;
// Structure passed to the IPSetMapRouteHook call.
typedef struct _IP_SET_MAP_ROUTE_HOOK_INFO {
IPMapRouteToInterfacePtr MapRoutePtr; // Map route callout.
} IP_SET_MAP_ROUTE_HOOK_INFO, *PIP_SET_MAP_ROUTE_HOOK_INFO;
#endif
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