NetworkPkg/Ip6Dxe/Ip6Input.h - third_party/edk2 - Git at Google

 /** @file
   IP6 internal functions and definitions to process the incoming packets.

   Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>

   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
   http://opensource.org/licenses/bsd-license.php.

   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

 **/

 #ifndef __EFI_IP6_INPUT_H__
 #define __EFI_IP6_INPUT_H__

 #define IP6_MIN_HEADLEN       40
 #define IP6_MAX_HEADLEN       120
 ///
 /// 8(ESP header) + 16(max IV) + 16(max padding) + 2(ESP tail) + 12(max ICV) = 54
 ///
 #define IP6_MAX_IPSEC_HEADLEN 54


 #define IP6_ASSEMLE_HASH_SIZE 127
 ///
 /// Lift time in seconds.
 ///
 #define IP6_FRAGMENT_LIFE     60
 #define IP6_MAX_PACKET_SIZE   65535


 #define IP6_GET_CLIP_INFO(Packet) ((IP6_CLIP_INFO *) ((Packet)->ProtoData))

 #define IP6_ASSEMBLE_HASH(Dst, Src, Id)  \
           ((*((UINT32 *) (Dst)) + *((UINT32 *) (Src)) + (Id)) % IP6_ASSEMLE_HASH_SIZE)

 #define IP6_RXDATA_WRAP_SIZE(NumFrag) \
           (sizeof (IP6_RXDATA_WRAP) + sizeof (EFI_IP6_FRAGMENT_DATA) * ((NumFrag) - 1))

 //
 // 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 {
   UINT32                    LinkFlag;
   INT32                     CastType;
   INT32                     Start;
   INT32                     End;
   INT32                     Length;
   UINT32                    Life;
   EFI_STATUS                Status;
   UINT32                    Id;
   UINT16                    HeadLen;
   UINT8                     NextHeader;
   UINT8                     LastFrag;
   UINT32                    FormerNextHeader;
 } IP6_CLIP_INFO;

 //
 // Structure used to assemble IP packets.
 //
 typedef struct {
   LIST_ENTRY                Link;
   LIST_ENTRY                Fragments;  // List of all the fragments of this packet

   //
   // Identity of one IP6 packet. Each fragment of a packet has
   // the same (Dst, Src, Id).
   //
   EFI_IPv6_ADDRESS          Dst;
   EFI_IPv6_ADDRESS          Src;
   UINT32                    Id;

   UINT32                    TotalLen;
   UINT32                    CurLen;
   UINT32                    Life;       // Count down life for the packet.

   EFI_IP6_HEADER            *Head;      // IP head of the first fragment
   IP6_CLIP_INFO             *Info;      // Per packet information of the first fragment
   NET_BUF                   *Packet;    // The first fragment of the packet
 } IP6_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[IP6_ASSEMLE_HASH_SIZE];
 } IP6_ASSEMBLE_TABLE;

 /**
   The IP6 input routine. It is called by the IP6_INTERFACE when an
   IP6 fragment is received from MNP.

   @param[in]  Packet             The IP6 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 IP6 service instance that own the MNP.

 **/
 VOID
 Ip6AcceptFrame (
   IN NET_BUF                *Packet,
   IN EFI_STATUS             IoStatus,
   IN UINT32                 Flag,
   IN VOID                   *Context
   );

 /**
   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
 Ip6InstanceDeliverPacket (
   IN IP6_PROTOCOL           *IpInstance
   );

 /**
   The work function to locate the IPsec protocol to process the inbound or
   outbound IP packets. The process routine handles the packet with the following
   actions: bypass the packet, discard the packet, or protect the packet.

   @param[in]       IpSb          The IP6 service instance.
   @param[in, out]  Head          The caller-supplied IP6 header.
   @param[in, out]  LastHead      The next header field of last IP header.
   @param[in, out]  Netbuf        The IP6 packet to be processed by IPsec.
   @param[in, out]  ExtHdrs       The caller-supplied options.
   @param[in, out]  ExtHdrsLen    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 are not suffcient resources to complete the operation.
   @retval EFI_BUFFER_TOO_SMALL   The number of non-empty blocks is bigger than the
                                  number of input data blocks when building a fragment table.

 **/
 EFI_STATUS
 Ip6IpSecProcessPacket (
   IN     IP6_SERVICE            *IpSb,
   IN OUT EFI_IP6_HEADER         **Head,
   IN OUT UINT8                  *LastHead,
   IN OUT NET_BUF                **Netbuf,
   IN OUT UINT8                  **ExtHdrs,
   IN OUT UINT32                 *ExtHdrsLen,
   IN     EFI_IPSEC_TRAFFIC_DIR  Direction,
   IN     VOID                   *Context
   );

 /**
   Initialize an already allocated assemble table. This is generally
   the assemble table embedded in the IP6 service instance.

   @param[in, out]  Table    The assemble table to initialize.

 **/
 VOID
 Ip6CreateAssembleTable (
   IN OUT IP6_ASSEMBLE_TABLE *Table
   );

 /**
   Clean up the assemble table: remove all the fragments
   and assemble entries.

   @param[in, out]  Table    The assemble table to clean up.

 **/
 VOID
 Ip6CleanAssembleTable (
   IN OUT IP6_ASSEMBLE_TABLE *Table
   );

 /**
   Demultiple the packet. the packet delivery is processed in two
   passes. The first pass will enque a shared copy of the packet
   to each IP6 child that accepts the packet. The second pass will
   deliver a non-shared copy of the packet to each IP6 child that
   has pending receive requests. Data is copied if more than one
   child wants to consume the packet bacause each IP child need
   its own copy of the packet to make changes.

   @param[in]  IpSb          The IP6 service instance that received the packet.
   @param[in]  Head          The header of the received packet.
   @param[in]  Packet        The data of the received packet.

   @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
 Ip6Demultiplex (
   IN IP6_SERVICE            *IpSb,
   IN EFI_IP6_HEADER         *Head,
   IN NET_BUF                *Packet
   );

 /**
   Timeout the fragmented, enqueued, and transmitted packets.

   @param[in]  IpSb          The IP6 service instance to timeout.

 **/
 VOID
 Ip6PacketTimerTicking (
   IN IP6_SERVICE            *IpSb
   );

 #endif
	/** @file
	IP6 internal functions and definitions to process the incoming packets.

	Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>

	This program and the accompanying materials
	are licensed and made available under the terms and conditions of the BSD License
	which accompanies this distribution. The full text of the license may be found at
	http://opensource.org/licenses/bsd-license.php.

	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

	**/

	#ifndef __EFI_IP6_INPUT_H__
	#define __EFI_IP6_INPUT_H__

	#define IP6_MIN_HEADLEN 40
	#define IP6_MAX_HEADLEN 120
	///
	/// 8(ESP header) + 16(max IV) + 16(max padding) + 2(ESP tail) + 12(max ICV) = 54
	///
	#define IP6_MAX_IPSEC_HEADLEN 54


	#define IP6_ASSEMLE_HASH_SIZE 127
	///
	/// Lift time in seconds.
	///
	#define IP6_FRAGMENT_LIFE 60
	#define IP6_MAX_PACKET_SIZE 65535


	#define IP6_GET_CLIP_INFO(Packet) ((IP6_CLIP_INFO *) ((Packet)->ProtoData))

	#define IP6_ASSEMBLE_HASH(Dst, Src, Id) \
	((((UINT32 ) (Dst)) + ((UINT32 ) (Src)) + (Id)) % IP6_ASSEMLE_HASH_SIZE)

	#define IP6_RXDATA_WRAP_SIZE(NumFrag) \
	(sizeof (IP6_RXDATA_WRAP) + sizeof (EFI_IP6_FRAGMENT_DATA) * ((NumFrag) - 1))

	//
	// 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 {
	UINT32 LinkFlag;
	INT32 CastType;
	INT32 Start;
	INT32 End;
	INT32 Length;
	UINT32 Life;
	EFI_STATUS Status;
	UINT32 Id;
	UINT16 HeadLen;
	UINT8 NextHeader;
	UINT8 LastFrag;
	UINT32 FormerNextHeader;
	} IP6_CLIP_INFO;

	//
	// Structure used to assemble IP packets.
	//
	typedef struct {
	LIST_ENTRY Link;
	LIST_ENTRY Fragments; // List of all the fragments of this packet

	//
	// Identity of one IP6 packet. Each fragment of a packet has
	// the same (Dst, Src, Id).
	//
	EFI_IPv6_ADDRESS Dst;
	EFI_IPv6_ADDRESS Src;
	UINT32 Id;

	UINT32 TotalLen;
	UINT32 CurLen;
	UINT32 Life; // Count down life for the packet.

	EFI_IP6_HEADER *Head; // IP head of the first fragment
	IP6_CLIP_INFO *Info; // Per packet information of the first fragment
	NET_BUF *Packet; // The first fragment of the packet
	} IP6_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[IP6_ASSEMLE_HASH_SIZE];
	} IP6_ASSEMBLE_TABLE;

	/**
	The IP6 input routine. It is called by the IP6_INTERFACE when an
	IP6 fragment is received from MNP.

	@param[in] Packet The IP6 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 IP6 service instance that own the MNP.

	**/
	VOID
	Ip6AcceptFrame (
	IN NET_BUF *Packet,
	IN EFI_STATUS IoStatus,
	IN UINT32 Flag,
	IN VOID *Context
	);

	/**
	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
	Ip6InstanceDeliverPacket (
	IN IP6_PROTOCOL *IpInstance
	);

	/**
	The work function to locate the IPsec protocol to process the inbound or
	outbound IP packets. The process routine handles the packet with the following
	actions: bypass the packet, discard the packet, or protect the packet.

	@param[in] IpSb The IP6 service instance.
	@param[in, out] Head The caller-supplied IP6 header.
	@param[in, out] LastHead The next header field of last IP header.
	@param[in, out] Netbuf The IP6 packet to be processed by IPsec.
	@param[in, out] ExtHdrs The caller-supplied options.
	@param[in, out] ExtHdrsLen 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 are not suffcient resources to complete the operation.
	@retval EFI_BUFFER_TOO_SMALL The number of non-empty blocks is bigger than the
	number of input data blocks when building a fragment table.

	**/
	EFI_STATUS
	Ip6IpSecProcessPacket (
	IN IP6_SERVICE *IpSb,
	IN OUT EFI_IP6_HEADER **Head,
	IN OUT UINT8 *LastHead,
	IN OUT NET_BUF **Netbuf,
	IN OUT UINT8 **ExtHdrs,
	IN OUT UINT32 *ExtHdrsLen,
	IN EFI_IPSEC_TRAFFIC_DIR Direction,
	IN VOID *Context
	);

	/**
	Initialize an already allocated assemble table. This is generally
	the assemble table embedded in the IP6 service instance.

	@param[in, out] Table The assemble table to initialize.

	**/
	VOID
	Ip6CreateAssembleTable (
	IN OUT IP6_ASSEMBLE_TABLE *Table
	);

	/**
	Clean up the assemble table: remove all the fragments
	and assemble entries.

	@param[in, out] Table The assemble table to clean up.

	**/
	VOID
	Ip6CleanAssembleTable (
	IN OUT IP6_ASSEMBLE_TABLE *Table
	);

	/**
	Demultiple the packet. the packet delivery is processed in two
	passes. The first pass will enque a shared copy of the packet
	to each IP6 child that accepts the packet. The second pass will
	deliver a non-shared copy of the packet to each IP6 child that
	has pending receive requests. Data is copied if more than one
	child wants to consume the packet bacause each IP child need
	its own copy of the packet to make changes.

	@param[in] IpSb The IP6 service instance that received the packet.
	@param[in] Head The header of the received packet.
	@param[in] Packet The data of the received packet.

	@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
	Ip6Demultiplex (
	IN IP6_SERVICE *IpSb,
	IN EFI_IP6_HEADER *Head,
	IN NET_BUF *Packet
	);

	/**
	Timeout the fragmented, enqueued, and transmitted packets.

	@param[in] IpSb The IP6 service instance to timeout.

	**/
	VOID
	Ip6PacketTimerTicking (
	IN IP6_SERVICE *IpSb
	);

	#endif