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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4693 6f19259b-4bc3-4df7-8a09-765794883524
139 lines
3.9 KiB
C
139 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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Ip4Input.h
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Abstract:
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**/
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#ifndef __EFI_IP4_INPUT_H__
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#define __EFI_IP4_INPUT_H__
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enum {
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IP4_MIN_HEADLEN = 20,
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IP4_MAX_HEADLEN = 60,
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IP4_ASSEMLE_HASH_SIZE = 31,
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IP4_FRAGMENT_LIFE = 120,
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IP4_MAX_PACKET_SIZE = 65535
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};
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//
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// Per packet information for input process. LinkFlag specifies whether
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// the packet is received as Link layer unicast, multicast or broadcast.
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// The CastType is the IP layer cast type, such as IP multicast or unicast.
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// Start, End and Length are staffs used to assemble the packets. Start
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// is the sequence number of the first byte of data in the packet. Length
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// is the number of bytes of data. End = Start + Length, that is, the
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// sequence number of last byte + 1. Each assembled packet has a count down
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// life. If it isn't consumed before Life reaches zero, the packet is released.
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//
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typedef struct {
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UINTN LinkFlag;
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INTN CastType;
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INTN Start;
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INTN End;
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INTN Length;
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UINT32 Life;
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EFI_STATUS Status;
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} IP4_CLIP_INFO;
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//
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// Structure used to assemble IP packets.
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//
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typedef struct {
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LIST_ENTRY Link;
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//
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// Identity of one IP4 packet. Each fragment of a packet has
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// the same (Dst, Src, Id, Protocol).
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//
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IP4_ADDR Dst;
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IP4_ADDR Src;
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UINT16 Id;
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UINT8 Protocol;
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INTN TotalLen;
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INTN CurLen;
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LIST_ENTRY Fragments; // List of all the fragments of this packet
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IP4_HEAD *Head; // IP head of the first fragment
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IP4_CLIP_INFO *Info; // Per packet info of the first fragment
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INTN Life; // Count down life for the packet.
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} IP4_ASSEMBLE_ENTRY;
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//
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// Each Ip service instance has an assemble table to reassemble
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// the packets before delivery to its children. It is organized
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// as hash table.
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//
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typedef struct {
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LIST_ENTRY Bucket[IP4_ASSEMLE_HASH_SIZE];
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} IP4_ASSEMBLE_TABLE;
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#define IP4_GET_CLIP_INFO(Packet) ((IP4_CLIP_INFO *) ((Packet)->ProtoData))
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#define IP4_ASSEMBLE_HASH(Dst, Src, Id, Proto) \
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(((Dst) + (Src) + ((Id) << 16) + (Proto)) % IP4_ASSEMLE_HASH_SIZE)
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#define IP4_RXDATA_WRAP_SIZE(NumFrag) \
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(sizeof (IP4_RXDATA_WRAP) + sizeof (EFI_IP4_FRAGMENT_DATA) * ((NumFrag) - 1))
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VOID
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Ip4InitAssembleTable (
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IN IP4_ASSEMBLE_TABLE *Table
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);
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VOID
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Ip4CleanAssembleTable (
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IN IP4_ASSEMBLE_TABLE *Table
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);
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VOID
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Ip4AccpetFrame (
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IN IP4_PROTOCOL *Ip4Instance,
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IN NET_BUF *Packet,
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IN EFI_STATUS IoStatus,
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IN UINT32 Flag,
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IN VOID *Context
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);
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EFI_STATUS
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Ip4Demultiplex (
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IN IP4_SERVICE *SbInstance,
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IN IP4_HEAD *Head,
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IN NET_BUF *Packet
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);
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INTN
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Ip4InterfaceEnquePacket (
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IN IP4_SERVICE *SbInstance,
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IN IP4_HEAD *Head,
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IN NET_BUF *Packet,
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IN IP4_INTERFACE *Interface
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);
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EFI_STATUS
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Ip4InstanceDeliverPacket (
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IN IP4_PROTOCOL *Ip4Instance
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);
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VOID
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Ip4PacketTimerTicking (
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IN IP4_SERVICE *IpSb
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);
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#endif
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