Ip4Route.h

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#ifndef __EFI_IP4_ROUTE_H__
#define __EFI_IP4_ROUTE_H__
 
#include "Ip4Common.h"
 
#define IP4_DIRECT_ROUTE  0x00000001
 
#define IP4_ROUTE_CACHE_HASH_VALUE  31
#define IP4_ROUTE_CACHE_MAX         64 // Max NO. of cache entry per hash bucket
 
#define IP4_ROUTE_CACHE_HASH(Dst, Src)  (((Dst) ^ (Src)) % IP4_ROUTE_CACHE_HASH_VALUE)
 
typedef struct {
  LIST_ENTRY    Link;
  INTN          RefCnt;
  IP4_ADDR      Dest;
  IP4_ADDR      Netmask;
  IP4_ADDR      NextHop;
  UINT32        Flag;
} IP4_ROUTE_ENTRY;
 
typedef struct {
  LIST_ENTRY    Link;
  INTN          RefCnt;
  IP4_ADDR      Dest;
  IP4_ADDR      Src;
  IP4_ADDR      NextHop;
  UINTN         Tag;
} IP4_ROUTE_CACHE_ENTRY;
 
typedef struct {
  LIST_ENTRY    CacheBucket[IP4_ROUTE_CACHE_HASH_VALUE];
} IP4_ROUTE_CACHE;
 
typedef struct _IP4_ROUTE_TABLE IP4_ROUTE_TABLE;
 
struct _IP4_ROUTE_TABLE {
  INTN               RefCnt;
  UINT32             TotalNum;
  LIST_ENTRY         RouteArea[IP4_MASK_NUM];
  IP4_ROUTE_TABLE    *Next;
  IP4_ROUTE_CACHE    Cache;
};
 
IP4_ROUTE_TABLE *
Ip4CreateRouteTable (
  VOID
  );
 
VOID
Ip4FreeRouteTable (
  IN IP4_ROUTE_TABLE  *RtTable
  );
 
EFI_STATUS
Ip4AddRoute (
  IN OUT IP4_ROUTE_TABLE  *RtTable,
  IN     IP4_ADDR         Dest,
  IN     IP4_ADDR         Netmask,
  IN     IP4_ADDR         Gateway
  );
 
EFI_STATUS
Ip4DelRoute (
  IN OUT IP4_ROUTE_TABLE  *RtTable,
  IN     IP4_ADDR         Dest,
  IN     IP4_ADDR         Netmask,
  IN     IP4_ADDR         Gateway
  );
 
IP4_ROUTE_CACHE_ENTRY *
Ip4FindRouteCache (
  IN IP4_ROUTE_TABLE  *RtTable,
  IN IP4_ADDR         Dest,
  IN IP4_ADDR         Src
  );
 
VOID
Ip4FreeRouteCacheEntry (
  IN IP4_ROUTE_CACHE_ENTRY  *RtCacheEntry
  );
 
IP4_ROUTE_CACHE_ENTRY *
Ip4Route (
  IN IP4_ROUTE_TABLE  *RtTable,
  IN IP4_ADDR         Dest,
  IN IP4_ADDR         Src,
  IN IP4_ADDR         SubnetMask,
  IN BOOLEAN          AlwaysTryDestAddr
  );
 
EFI_STATUS
Ip4BuildEfiRouteTable (
  IN IP4_PROTOCOL  *IpInstance
  );
 
#endif