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/** @file
Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __EFI_IP4_INPUT_H__
#define __EFI_IP4_INPUT_H__
#define IP4_MIN_HEADLEN 20
#define IP4_MAX_HEADLEN 60
///
/// 8(ESP header) + 16(max IV) + 16(max padding) + 2(ESP tail) + 12(max ICV) = 54
///
#define IP4_MAX_IPSEC_HEADLEN 54
#define IP4_ASSEMLE_HASH_SIZE 31
#define IP4_FRAGMENT_LIFE 120
#define IP4_MAX_PACKET_SIZE 65535
///
/// Per packet information for input process. LinkFlag specifies whether
/// the packet is received as Link layer unicast, multicast or broadcast.
/// The CastType is the IP layer cast type, such as IP multicast or unicast.
/// Start, End and Length are staffs used to assemble the packets. Start
/// is the sequence number of the first byte of data in the packet. Length
/// is the number of bytes of data. End = Start + Length, that is, the
/// sequence number of last byte + 1. Each assembled packet has a count down
/// life. If it isn't consumed before Life reaches zero, the packet is released.
///
typedef struct {
UINTN LinkFlag;
INTN CastType;
INTN Start;
INTN End;
INTN Length;
UINT32 Life;
EFI_STATUS Status;
} IP4_CLIP_INFO;
///
/// Structure used to assemble IP packets.
///
typedef struct {
LIST_ENTRY Link;
//
// Identity of one IP4 packet. Each fragment of a packet has
// the same (Dst, Src, Id, Protocol).
//
IP4_ADDR Dst;
IP4_ADDR Src;
UINT16 Id;
UINT8 Protocol;
INTN TotalLen;
INTN CurLen;
LIST_ENTRY Fragments; // List of all the fragments of this packet
IP4_HEAD *Head; // IP head of the first fragment
IP4_CLIP_INFO *Info; // Per packet info of the first fragment
INTN Life; // Count down life for the packet.
} IP4_ASSEMBLE_ENTRY;
///
/// Each Ip service instance has an assemble table to reassemble
/// the packets before delivery to its children. It is organized
/// as hash table.
///
typedef struct {
LIST_ENTRY Bucket[IP4_ASSEMLE_HASH_SIZE];
} IP4_ASSEMBLE_TABLE;
#define IP4_GET_CLIP_INFO(Packet) ((IP4_CLIP_INFO *) ((Packet)->ProtoData))
#define IP4_ASSEMBLE_HASH(Dst, Src, Id, Proto) \
(((Dst) + (Src) + ((Id) << 16) + (Proto)) % IP4_ASSEMLE_HASH_SIZE)
#define IP4_RXDATA_WRAP_SIZE(NumFrag) \
(sizeof (IP4_RXDATA_WRAP) + sizeof (EFI_IP4_FRAGMENT_DATA) * ((NumFrag) - 1))
/**
Initialize an already allocated assemble table. This is generally
the assemble table embedded in the IP4 service instance.
@param[in, out] Table The assemble table to initialize.
**/
VOID
Ip4InitAssembleTable (
IN OUT IP4_ASSEMBLE_TABLE *Table
);
/**
Clean up the assemble table: remove all the fragments
and assemble entries.
@param[in] Table The assemble table to clean up
**/
VOID
Ip4CleanAssembleTable (
IN IP4_ASSEMBLE_TABLE *Table
);
/**
The IP4 input routine. It is called by the IP4_INTERFACE when a
IP4 fragment is received from MNP.
@param[in] Ip4Instance The IP4 child that request the receive, most like
it is NULL.
@param[in] Packet The IP4 packet received.
@param[in] IoStatus The return status of receive request.
@param[in] Flag The link layer flag for the packet received, such
as multicast.
@param[in] Context The IP4 service instance that own the MNP.
**/
VOID
Ip4AccpetFrame (
IN IP4_PROTOCOL *Ip4Instance,
IN NET_BUF *Packet,
IN EFI_STATUS IoStatus,
IN UINT32 Flag,
IN VOID *Context
);
/**
Demultiple the packet. the packet delivery is processed in two
passes. The first pass will enqueue a shared copy of the packet
to each IP4 child that accepts the packet. The second pass will
deliver a non-shared copy of the packet to each IP4 child that
has pending receive requests. Data is copied if more than one
child wants to consume the packet because each IP child needs
its own copy of the packet to make changes.
@param[in] IpSb The IP4 service instance that received the packet.
@param[in] Head The header of the received packet.
@param[in] Packet The data of the received packet.
@param[in] Option Point to the IP4 packet header options.
@param[in] OptionLen Length of the IP4 packet header options.
@retval EFI_NOT_FOUND No IP child accepts the packet.
@retval EFI_SUCCESS The packet is enqueued or delivered to some IP
children.
**/
EFI_STATUS
Ip4Demultiplex (
IN IP4_SERVICE *IpSb,
IN IP4_HEAD *Head,
IN NET_BUF *Packet,
IN UINT8 *Option,
IN UINT32 OptionLen
);
/**
Enqueue a received packet to all the IP children that share
the same interface.
@param[in] IpSb The IP4 service instance that receive the packet.
@param[in] Head The header of the received packet.
@param[in] Packet The data of the received packet.
@param[in] Option Point to the IP4 packet header options.
@param[in] OptionLen Length of the IP4 packet header options.
@param[in] IpIf The interface to enqueue the packet to.
@return The number of the IP4 children that accepts the packet
**/
INTN
Ip4InterfaceEnquePacket (
IN IP4_SERVICE *IpSb,
IN IP4_HEAD *Head,
IN NET_BUF *Packet,
IN UINT8 *Option,
IN UINT32 OptionLen,
IN IP4_INTERFACE *IpIf
);
/**
Deliver the received packets to upper layer if there are both received
requests and enqueued packets. If the enqueued packet is shared, it will
duplicate it to a non-shared packet, release the shared packet, then
deliver the non-shared packet up.
@param[in] IpInstance The IP child to deliver the packet up.
@retval EFI_OUT_OF_RESOURCES Failed to allocate resources to deliver the
packets.
@retval EFI_SUCCESS All the enqueued packets that can be delivered
are delivered up.
**/
EFI_STATUS
Ip4InstanceDeliverPacket (
IN IP4_PROTOCOL *IpInstance
);
/**
Timeout the fragment and enqueued packets.
@param[in] IpSb The IP4 service instance to timeout
**/
VOID
Ip4PacketTimerTicking (
IN IP4_SERVICE *IpSb
);
/**
The work function to locate IPsec protocol to process the inbound or
outbound IP packets. The process routine handls the packet with following
actions: bypass the packet, discard the packet, or protect the packet.
@param[in] IpSb The IP4 service instance.
@param[in, out] Head The caller supplied IP4 header.
@param[in, out] Netbuf The IP4 packet to be processed by IPsec.
@param[in, out] Options The caller supplied options.
@param[in, out] OptionsLen The length of the option.
@param[in] Direction The directionality in an SPD entry,
EfiIPsecInBound or EfiIPsecOutBound.
@param[in] Context The token's wrap.
@retval EFI_SUCCESS The IPsec protocol is not available or disabled.
@retval EFI_SUCCESS The packet was bypassed and all buffers remain the same.
@retval EFI_SUCCESS The packet was protected.
@retval EFI_ACCESS_DENIED The packet was discarded.
@retval EFI_OUT_OF_RESOURCES There is no sufficient resource to complete the operation.
@retval EFI_BUFFER_TOO_SMALL The number of non-empty block is bigger than the
number of input data blocks when build a fragment table.
**/
EFI_STATUS
Ip4IpSecProcessPacket (
IN IP4_SERVICE *IpSb,
IN OUT IP4_HEAD **Head,
IN OUT NET_BUF **Netbuf,
IN OUT UINT8 **Options,
IN OUT UINT32 *OptionsLen,
IN EFI_IPSEC_TRAFFIC_DIR Direction,
IN VOID *Context
);
#endif
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