mirror of https://github.com/acidanthera/audk.git
253 lines
9.0 KiB
C
253 lines
9.0 KiB
C
/** @file
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Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
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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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**/
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#ifndef __EFI_IP4_INPUT_H__
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#define __EFI_IP4_INPUT_H__
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#define IP4_MIN_HEADLEN 20
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#define IP4_MAX_HEADLEN 60
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///
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/// 8(ESP header) + 16(max IV) + 16(max padding) + 2(ESP tail) + 12(max ICV) = 54
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///
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#define IP4_MAX_IPSEC_HEADLEN 54
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#define IP4_ASSEMLE_HASH_SIZE 31
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#define IP4_FRAGMENT_LIFE 120
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#define IP4_MAX_PACKET_SIZE 65535
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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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/**
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Initialize an already allocated assemble table. This is generally
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the assemble table embedded in the IP4 service instance.
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@param[in, out] Table The assemble table to initialize.
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**/
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VOID
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Ip4InitAssembleTable (
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IN OUT IP4_ASSEMBLE_TABLE *Table
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);
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/**
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Clean up the assemble table: remove all the fragments
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and assemble entries.
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@param[in] Table The assemble table to clean up
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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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/**
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The IP4 input routine. It is called by the IP4_INTERFACE when a
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IP4 fragment is received from MNP.
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@param[in] Ip4Instance The IP4 child that request the receive, most like
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it is NULL.
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@param[in] Packet The IP4 packet received.
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@param[in] IoStatus The return status of receive request.
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@param[in] Flag The link layer flag for the packet received, such
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as multicast.
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@param[in] Context The IP4 service instance that own the MNP.
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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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/**
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Demultiple the packet. the packet delivery is processed in two
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passes. The first pass will enque a shared copy of the packet
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to each IP4 child that accepts the packet. The second pass will
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deliver a non-shared copy of the packet to each IP4 child that
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has pending receive requests. Data is copied if more than one
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child wants to consume the packet because each IP child needs
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its own copy of the packet to make changes.
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@param[in] IpSb The IP4 service instance that received the packet.
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@param[in] Head The header of the received packet.
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@param[in] Packet The data of the received packet.
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@param[in] Option Point to the IP4 packet header options.
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@param[in] OptionLen Length of the IP4 packet header options.
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@retval EFI_NOT_FOUND No IP child accepts the packet.
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@retval EFI_SUCCESS The packet is enqueued or delivered to some IP
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children.
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**/
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EFI_STATUS
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Ip4Demultiplex (
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IN IP4_SERVICE *IpSb,
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IN IP4_HEAD *Head,
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IN NET_BUF *Packet,
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IN UINT8 *Option,
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IN UINT32 OptionLen
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);
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/**
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Enqueue a received packet to all the IP children that share
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the same interface.
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@param[in] IpSb The IP4 service instance that receive the packet.
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@param[in] Head The header of the received packet.
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@param[in] Packet The data of the received packet.
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@param[in] Option Point to the IP4 packet header options.
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@param[in] OptionLen Length of the IP4 packet header options.
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@param[in] IpIf The interface to enqueue the packet to.
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@return The number of the IP4 children that accepts the packet
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**/
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INTN
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Ip4InterfaceEnquePacket (
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IN IP4_SERVICE *IpSb,
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IN IP4_HEAD *Head,
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IN NET_BUF *Packet,
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IN UINT8 *Option,
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IN UINT32 OptionLen,
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IN IP4_INTERFACE *IpIf
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);
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/**
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Deliver the received packets to upper layer if there are both received
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requests and enqueued packets. If the enqueued packet is shared, it will
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duplicate it to a non-shared packet, release the shared packet, then
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deliver the non-shared packet up.
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@param[in] IpInstance The IP child to deliver the packet up.
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@retval EFI_OUT_OF_RESOURCES Failed to allocate resources to deliver the
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packets.
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@retval EFI_SUCCESS All the enqueued packets that can be delivered
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are delivered up.
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**/
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EFI_STATUS
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Ip4InstanceDeliverPacket (
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IN IP4_PROTOCOL *IpInstance
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);
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/**
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Timeout the fragment and enqueued packets.
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@param[in] IpSb The IP4 service instance to timeout
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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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/**
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The work function to locate IPsec protocol to process the inbound or
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outbound IP packets. The process routine handls the packet with following
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actions: bypass the packet, discard the packet, or protect the packet.
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@param[in] IpSb The IP4 service instance.
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@param[in, out] Head The The caller supplied IP4 header.
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@param[in, out] Netbuf The IP4 packet to be processed by IPsec.
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@param[in, out] Options The caller supplied options.
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@param[in, out] OptionsLen The length of the option.
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@param[in] Direction The directionality in an SPD entry,
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EfiIPsecInBound or EfiIPsecOutBound.
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@param[in] Context The token's wrap.
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@retval EFI_SUCCESS The IPsec protocol is not available or disabled.
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@retval EFI_SUCCESS The packet was bypassed and all buffers remain the same.
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@retval EFI_SUCCESS The packet was protected.
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@retval EFI_ACCESS_DENIED The packet was discarded.
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@retval EFI_OUT_OF_RESOURCES There is no suffcient resource to complete the operation.
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@retval EFI_BUFFER_TOO_SMALL The number of non-empty block is bigger than the
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number of input data blocks when build a fragment table.
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**/
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EFI_STATUS
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Ip4IpSecProcessPacket (
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IN IP4_SERVICE *IpSb,
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IN OUT IP4_HEAD **Head,
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IN OUT NET_BUF **Netbuf,
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IN OUT UINT8 **Options,
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IN OUT UINT32 *OptionsLen,
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IN EFI_IPSEC_TRAFFIC_DIR Direction,
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IN VOID *Context
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);
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#endif
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