mirror of https://github.com/acidanthera/audk.git
152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/** @file
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Copyright (c) 2005 - 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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Ip4Route.h
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Abstract:
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EFI IP4 route table and route cache table defintions.
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**/
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#ifndef __EFI_IP4_ROUTE_H__
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#define __EFI_IP4_ROUTE_H__
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#include "IP4Common.h"
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enum {
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IP4_DIRECT_ROUTE = 0x00000001,
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IP4_ROUTE_CACHE_HASH = 31,
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IP4_ROUTE_CACHE_MAX = 64 // Max NO. of cache entry per hash bucket
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};
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#define IP4_ROUTE_CACHE_HASH(Dst, Src) (((Dst) ^ (Src)) % IP4_ROUTE_CACHE_HASH)
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//
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// The route entry in the route table. Dest/Netmask is the destion
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// network. The nexthop is the gateway to send the packet to in
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// order to reach the Dest/Netmask. If the Flag has IP4_DIRECT_ROUTE
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// on, the gateway is the destination of the IP packet itself. Route
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// enties of the connected network have the flag on.
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//
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typedef struct {
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NET_LIST_ENTRY Link;
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INTN RefCnt;
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IP4_ADDR Dest;
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IP4_ADDR Netmask;
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IP4_ADDR NextHop;
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UINT32 Flag;
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} IP4_ROUTE_ENTRY;
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//
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// The route cache entry. The route cache entry is optional.
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// But it is necessary to support the ICMP redirect message.
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// Check Ip4ProcessIcmpRedirect for information.
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//
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// The cache entry field Tag is used to tag all the route
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// cache entry spawned from a route table entry. This makes
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// it simple to delete all the route cache entries from a
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// to-be-deleted route entry.
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//
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typedef struct {
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NET_LIST_ENTRY Link;
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INTN RefCnt;
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IP4_ADDR Dest;
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IP4_ADDR Src;
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IP4_ADDR NextHop;
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UINTN Tag;
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} IP4_ROUTE_CACHE_ENTRY;
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//
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// The route cache table is organized as a hash table. Each
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// IP4 route table has a embedded route cache. For now the
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// route cache and route table are binded togehter. But keep
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// the route cache a seperated structure in case we want to
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// detach them later.
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//
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typedef struct {
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NET_LIST_ENTRY CacheBucket[IP4_ROUTE_CACHE_HASH];
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} IP4_ROUTE_CACHE;
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//
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// Each IP4 instance has its own route table. Each ServiceBinding
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// instance has a default route table and default address.
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//
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// All the route table entries with the same mask are linked
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// together in one route area. For example, RouteArea[0] contains
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// the default routes. A route table also contains a route cache.
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//
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typedef struct _IP4_ROUTE_TABLE IP4_ROUTE_TABLE;
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struct _IP4_ROUTE_TABLE {
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INTN RefCnt;
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UINT32 TotalNum;
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NET_LIST_ENTRY RouteArea[IP4_MASK_NUM];
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IP4_ROUTE_TABLE *Next;
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IP4_ROUTE_CACHE Cache;
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};
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IP4_ROUTE_TABLE*
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Ip4CreateRouteTable (
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VOID
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);
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VOID
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Ip4FreeRouteTable (
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IN IP4_ROUTE_TABLE *RouteTable
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);
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EFI_STATUS
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Ip4AddRoute (
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IN IP4_ROUTE_TABLE *RtTable,
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IN IP4_ADDR Dest,
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IN IP4_ADDR Netmask,
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IN IP4_ADDR Gateway
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);
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EFI_STATUS
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Ip4DelRoute (
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IN IP4_ROUTE_TABLE *RtTable,
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IN IP4_ADDR Dest,
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IN IP4_ADDR Netmask,
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IN IP4_ADDR Gateway
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);
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IP4_ROUTE_CACHE_ENTRY *
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Ip4FindRouteCache (
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IN IP4_ROUTE_TABLE *RtTable,
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IN IP4_ADDR Dest,
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IN IP4_ADDR Src
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);
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VOID
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Ip4FreeRouteCacheEntry (
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IN IP4_ROUTE_CACHE_ENTRY *RtCacheEntry
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);
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IP4_ROUTE_CACHE_ENTRY *
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Ip4Route (
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IN IP4_ROUTE_TABLE *RtTable,
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IN IP4_ADDR Dest,
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IN IP4_ADDR Src
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);
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EFI_STATUS
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Ip4BuildEfiRouteTable (
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IN IP4_PROTOCOL *IpInstance
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);
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#endif
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