[mirror_edk2.git] / MdePkg / Include / Protocol / Arp.h

/** @file\r
  EFI ARP Protocol Definition\r
\r
  The EFI ARP Service Binding Protocol is used to locate EFI\r
  ARP Protocol drivers to create and destroy child of the\r
  driver to communicate with other host using ARP protocol.\r
  The EFI ARP Protocol provides services to map IP network\r
  address to hardware address used by a data link protocol.\r
\r
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
  @par Revision Reference:\r
  This Protocol was introduced in UEFI Specification 2.0.\r
\r
**/\r
\r
#ifndef __EFI_ARP_PROTOCOL_H__\r
#define __EFI_ARP_PROTOCOL_H__\r
\r
#define EFI_ARP_SERVICE_BINDING_PROTOCOL_GUID \\r
  { \\r
    0xf44c00ee, 0x1f2c, 0x4a00, {0xaa, 0x9, 0x1c, 0x9f, 0x3e, 0x8, 0x0, 0xa3 } \\r
  }\r
\r
#define EFI_ARP_PROTOCOL_GUID \\r
  { \\r
    0xf4b427bb, 0xba21, 0x4f16, {0xbc, 0x4e, 0x43, 0xe4, 0x16, 0xab, 0x61, 0x9c } \\r
  }\r
\r
typedef struct _EFI_ARP_PROTOCOL EFI_ARP_PROTOCOL;\r
\r
typedef struct {\r
  ///\r
  /// Length in bytes of this entry.\r
  ///\r
  UINT32                      Size;\r
\r
  ///\r
  /// Set to TRUE if this entry is a "deny" entry.\r
  /// Set to FALSE if this entry is a "normal" entry.\r
  ///\r
  BOOLEAN                     DenyFlag;\r
\r
  ///\r
  /// Set to TRUE if this entry will not time out.\r
  /// Set to FALSE if this entry will time out.\r
  ///\r
  BOOLEAN                     StaticFlag;\r
\r
  ///\r
  /// 16-bit ARP hardware identifier number.\r
  ///\r
  UINT16                      HwAddressType;\r
\r
  ///\r
  /// 16-bit protocol type number.\r
  ///\r
  UINT16                      SwAddressType;\r
\r
  ///\r
  /// The length of the hardware address.\r
  ///\r
  UINT8                       HwAddressLength;\r
\r
  ///\r
  /// The length of the protocol address.\r
  ///\r
  UINT8                       SwAddressLength;\r
} EFI_ARP_FIND_DATA;\r
\r
typedef struct {\r
  ///\r
  /// 16-bit protocol type number in host byte order.\r
  ///\r
  UINT16                    SwAddressType;\r
\r
  ///\r
  /// The length in bytes of the station's protocol address to register.\r
  ///\r
  UINT8                     SwAddressLength;\r
\r
  ///\r
  /// The pointer to the first byte of the protocol address to register. For\r
  /// example, if SwAddressType is 0x0800 (IP), then\r
  /// StationAddress points to the first byte of this station's IP\r
  /// address stored in network byte order.\r
  ///\r
  VOID                      *StationAddress;\r
\r
  ///\r
  /// The timeout value in 100-ns units that is associated with each\r
  /// new dynamic ARP cache entry. If it is set to zero, the value is\r
  /// implementation-specific.\r
  ///\r
  UINT32                    EntryTimeOut;\r
\r
  ///\r
  /// The number of retries before a MAC address is resolved. If it is\r
  /// set to zero, the value is implementation-specific.\r
  ///\r
  UINT32                    RetryCount;\r
\r
  ///\r
  /// The timeout value in 100-ns units that is used to wait for the ARP\r
  /// reply packet or the timeout value between two retries. Set to zero\r
  /// to use implementation-specific value.\r
  ///\r
  UINT32                    RetryTimeOut;\r
} EFI_ARP_CONFIG_DATA;\r
\r
\r
/**\r
  This function is used to assign a station address to the ARP cache for this instance\r
  of the ARP driver.\r
\r
  Each ARP instance has one station address. The EFI_ARP_PROTOCOL driver will\r
  respond to ARP requests that match this registered station address. A call to\r
  this function with the ConfigData field set to NULL will reset this ARP instance.\r
\r
  Once a protocol type and station address have been assigned to this ARP instance,\r
  all the following ARP functions will use this information. Attempting to change\r
  the protocol type or station address to a configured ARP instance will result in errors.\r
\r
  @param  This                   The pointer to the EFI_ARP_PROTOCOL instance.\r
  @param  ConfigData             The pointer to the EFI_ARP_CONFIG_DATA structure.\r
\r
  @retval EFI_SUCCESS            The new station address was successfully\r
                                 registered.\r
  @retval EFI_INVALID_PARAMETER  One or more of the following conditions is TRUE:\r
                                 * This is NULL.\r
                                 * SwAddressLength is zero when ConfigData is not NULL.\r
                                 * StationAddress is NULL when ConfigData is not NULL.\r
  @retval EFI_ACCESS_DENIED      The SwAddressType, SwAddressLength, or\r
                                 StationAddress is different from the one that is\r
                                 already registered.\r
  @retval EFI_OUT_OF_RESOURCES   Storage for the new StationAddress could not be\r
                                 allocated.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ARP_CONFIGURE)(\r
  IN EFI_ARP_PROTOCOL       *This,\r
  IN EFI_ARP_CONFIG_DATA    *ConfigData   OPTIONAL\r
  );\r
\r
/**\r
  This function is used to insert entries into the ARP cache.\r
\r
  ARP cache entries are typically inserted and updated by network protocol drivers\r
  as network traffic is processed. Most ARP cache entries will time out and be\r
  deleted if the network traffic stops. ARP cache entries that were inserted\r
  by the Add() function may be static (will not time out) or dynamic (will time out).\r
  Default ARP cache timeout values are not covered in most network protocol\r
  specifications (although RFC 1122 comes pretty close) and will only be\r
  discussed in general terms in this specification. The timeout values that are\r
  used in the EFI Sample Implementation should be used only as a guideline.\r
  Final product implementations of the EFI network stack should be tuned for\r
  their expected network environments.\r
\r
  @param  This                   Pointer to the EFI_ARP_PROTOCOL instance.\r
  @param  DenyFlag               Set to TRUE if this entry is a deny entry. Set to\r
                                 FALSE if this  entry is a normal entry.\r
  @param  TargetSwAddress        Pointer to a protocol address to add (or deny).\r
                                 May be set to NULL if DenyFlag is TRUE.\r
  @param  TargetHwAddress        Pointer to a hardware address to add (or deny).\r
                                 May be set to NULL if DenyFlag is TRUE.\r
  @param  TimeoutValue           Time in 100-ns units that this entry will remain\r
                                 in the ARP cache. A value of zero means that the\r
                                 entry is permanent. A nonzero value will override\r
                                 the one given by Configure() if the entry to be\r
                                 added is a dynamic entry.\r
  @param  Overwrite              If TRUE, the matching cache entry will be\r
                                 overwritten with the supplied parameters. If\r
                                 FALSE, EFI_ACCESS_DENIED is returned if the\r
                                 corresponding cache entry already exists.\r
\r
  @retval EFI_SUCCESS            The entry has been added or updated.\r
  @retval EFI_INVALID_PARAMETER  One or more of the following conditions is TRUE:\r
                                 * This is NULL.\r
                                 * DenyFlag is FALSE and TargetHwAddress is NULL.\r
                                 * DenyFlag is FALSE and TargetSwAddress is NULL.\r
                                 * TargetHwAddress is NULL and TargetSwAddress is NULL.\r
                                 * Neither TargetSwAddress nor TargetHwAddress are NULL when DenyFlag is\r
                                 TRUE.\r
  @retval EFI_OUT_OF_RESOURCES   The new ARP cache entry could not be allocated.\r
  @retval EFI_ACCESS_DENIED      The ARP cache entry already exists and Overwrite\r
                                 is not true.\r
  @retval EFI_NOT_STARTED        The ARP driver instance has not been configured.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ARP_ADD)(\r
  IN EFI_ARP_PROTOCOL       *This,\r
  IN BOOLEAN                DenyFlag,\r
  IN VOID                   *TargetSwAddress  OPTIONAL,\r
  IN VOID                   *TargetHwAddress  OPTIONAL,\r
  IN UINT32                 TimeoutValue,\r
  IN BOOLEAN                Overwrite\r
  );\r
\r
/**\r
  This function searches the ARP cache for matching entries and allocates a buffer into\r
  which those entries are copied.\r
\r
  The first part of the allocated buffer is EFI_ARP_FIND_DATA, following which\r
  are protocol address pairs and hardware address pairs.\r
  When finding a specific protocol address (BySwAddress is TRUE and AddressBuffer\r
  is not NULL), the ARP cache timeout for the found entry is reset if Refresh is\r
  set to TRUE. If the found ARP cache entry is a permanent entry, it is not\r
  affected by Refresh.\r
\r
  @param  This                   The pointer to the EFI_ARP_PROTOCOL instance.\r
  @param  BySwAddress            Set to TRUE to look for matching software protocol\r
                                 addresses. Set to FALSE to look for matching\r
                                 hardware protocol addresses.\r
  @param  AddressBuffer          The pointer to the address buffer. Set to NULL\r
                                 to match all addresses.\r
  @param  EntryLength            The size of an entry in the entries buffer.\r
  @param  EntryCount             The number of ARP cache entries that are found by\r
                                 the specified criteria.\r
  @param  Entries                The pointer to the buffer that will receive the ARP\r
                                 cache entries.\r
  @param  Refresh                Set to TRUE to refresh the timeout value of the\r
                                 matching ARP cache entry.\r
\r
  @retval EFI_SUCCESS            The requested ARP cache entries were copied into\r
                                 the buffer.\r
  @retval EFI_INVALID_PARAMETER  One or more of the following conditions is TRUE:\r
                                 This is NULL. Both EntryCount and EntryLength are\r
                                 NULL, when Refresh is FALSE.\r
  @retval EFI_NOT_FOUND          No matching entries were found.\r
  @retval EFI_NOT_STARTED        The ARP driver instance has not been configured.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ARP_FIND)(\r
  IN EFI_ARP_PROTOCOL       *This,\r
  IN BOOLEAN                BySwAddress,\r
  IN VOID                   *AddressBuffer    OPTIONAL,\r
  OUT UINT32                *EntryLength      OPTIONAL,\r
  OUT UINT32                *EntryCount       OPTIONAL,\r
  OUT EFI_ARP_FIND_DATA     **Entries         OPTIONAL,\r
  IN BOOLEAN                Refresh\r
  );\r
\r
\r
/**\r
  This function removes specified ARP cache entries.\r
\r
  @param  This                   The pointer to the EFI_ARP_PROTOCOL instance.\r
  @param  BySwAddress            Set to TRUE to delete matching protocol addresses.\r
                                 Set to FALSE to delete matching hardware\r
                                 addresses.\r
  @param  AddressBuffer          The pointer to the address buffer that is used as a\r
                                 key to look for the cache entry. Set to NULL to\r
                                 delete all entries.\r
\r
  @retval EFI_SUCCESS            The entry was removed from the ARP cache.\r
  @retval EFI_INVALID_PARAMETER  This is NULL.\r
  @retval EFI_NOT_FOUND          The specified deletion key was not found.\r
  @retval EFI_NOT_STARTED        The ARP driver instance has not been configured.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ARP_DELETE)(\r
  IN EFI_ARP_PROTOCOL       *This,\r
  IN BOOLEAN                BySwAddress,\r
  IN VOID                   *AddressBuffer   OPTIONAL\r
  );\r
\r
/**\r
  This function delete all dynamic entries from the ARP cache that match the specified\r
  software protocol type.\r
\r
  @param  This                   The pointer to the EFI_ARP_PROTOCOL instance.\r
\r
  @retval EFI_SUCCESS            The cache has been flushed.\r
  @retval EFI_INVALID_PARAMETER  This is NULL.\r
  @retval EFI_NOT_FOUND          There are no matching dynamic cache entries.\r
  @retval EFI_NOT_STARTED        The ARP driver instance has not been configured.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ARP_FLUSH)(\r
  IN EFI_ARP_PROTOCOL       *This\r
  );\r
\r
/**\r
  This function tries to resolve the TargetSwAddress and optionally returns a\r
  TargetHwAddress if it already exists in the ARP cache.\r
\r
  @param  This                   The pointer to the EFI_ARP_PROTOCOL instance.\r
  @param  TargetSwAddress        The pointer to the protocol address to resolve.\r
  @param  ResolvedEvent          The pointer to the event that will be signaled when\r
                                 the address is resolved or some error occurs.\r
  @param  TargetHwAddress        The pointer to the buffer for the resolved hardware\r
                                 address in network byte order.\r
\r
  @retval EFI_SUCCESS            The data is copied from the ARP cache into the\r
                                 TargetHwAddress buffer.\r
  @retval EFI_INVALID_PARAMETER  One or more of the following conditions is TRUE:\r
                                 This is NULL. TargetHwAddress is NULL.\r
  @retval EFI_ACCESS_DENIED      The requested address is not present in the normal\r
                                 ARP cache but is present in the deny address list.\r
                                 Outgoing traffic to that address is forbidden.\r
  @retval EFI_NOT_STARTED        The ARP driver instance has not been configured.\r
  @retval EFI_NOT_READY          The request has been started and is not finished.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ARP_REQUEST)(\r
  IN EFI_ARP_PROTOCOL       *This,\r
  IN VOID                   *TargetSwAddress  OPTIONAL,\r
  IN EFI_EVENT              ResolvedEvent     OPTIONAL,\r
  OUT VOID                  *TargetHwAddress\r
  );\r
\r
/**\r
  This function aborts the previous ARP request (identified by This, TargetSwAddress\r
  and ResolvedEvent) that is issued by EFI_ARP_PROTOCOL.Request().\r
\r
  If the request is in the internal ARP request queue, the request is aborted\r
  immediately and its ResolvedEvent is signaled. Only an asynchronous address\r
  request needs to be canceled. If TargeSwAddress and ResolveEvent are both\r
  NULL, all the pending asynchronous requests that have been issued by This\r
  instance will be cancelled and their corresponding events will be signaled.\r
\r
  @param  This                   The pointer to the EFI_ARP_PROTOCOL instance.\r
  @param  TargetSwAddress        The pointer to the protocol address in previous\r
                                 request session.\r
  @param  ResolvedEvent          Pointer to the event that is used as the\r
                                 notification event in previous request session.\r
\r
  @retval EFI_SUCCESS            The pending request session(s) is/are aborted and\r
                                 corresponding event(s) is/are signaled.\r
  @retval EFI_INVALID_PARAMETER  One or more of the following conditions is TRUE:\r
                                 This is NULL. TargetSwAddress is not NULL and\r
                                 ResolvedEvent is NULL. TargetSwAddress is NULL and\r
                                 ResolvedEvent is not NULL.\r
  @retval EFI_NOT_STARTED        The ARP driver instance has not been configured.\r
  @retval EFI_NOT_FOUND          The request is not issued by\r
                                 EFI_ARP_PROTOCOL.Request().\r
\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ARP_CANCEL)(\r
  IN EFI_ARP_PROTOCOL       *This,\r
  IN VOID                   *TargetSwAddress  OPTIONAL,\r
  IN EFI_EVENT              ResolvedEvent     OPTIONAL\r
  );\r
\r
///\r
/// ARP is used to resolve local network protocol addresses into\r
/// network hardware addresses.\r
///\r
struct _EFI_ARP_PROTOCOL {\r
  EFI_ARP_CONFIGURE         Configure;\r
  EFI_ARP_ADD               Add;\r
  EFI_ARP_FIND              Find;\r
  EFI_ARP_DELETE            Delete;\r
  EFI_ARP_FLUSH             Flush;\r
  EFI_ARP_REQUEST           Request;\r
  EFI_ARP_CANCEL            Cancel;\r
};\r
\r
\r
extern EFI_GUID gEfiArpServiceBindingProtocolGuid;\r
extern EFI_GUID gEfiArpProtocolGuid;\r
\r
#endif\r
Commit	Line	Data
	1	/** @file\r
	2	EFI ARP Protocol Definition\r
	3	\r
	4	The EFI ARP Service Binding Protocol is used to locate EFI\r
	5	ARP Protocol drivers to create and destroy child of the\r
	6	driver to communicate with other host using ARP protocol.\r
	7	The EFI ARP Protocol provides services to map IP network\r
	8	address to hardware address used by a data link protocol.\r
	9	\r
	10	Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
	11	SPDX-License-Identifier: BSD-2-Clause-Patent\r
	12	\r
	13	@par Revision Reference:\r
	14	This Protocol was introduced in UEFI Specification 2.0.\r
	15	\r
	16	**/\r
	17	\r
	18	#ifndef __EFI_ARP_PROTOCOL_H__\r
	19	#define __EFI_ARP_PROTOCOL_H__\r
	20	\r
	21	#define EFI_ARP_SERVICE_BINDING_PROTOCOL_GUID \\r
	22	{ \\r
	23	0xf44c00ee, 0x1f2c, 0x4a00, {0xaa, 0x9, 0x1c, 0x9f, 0x3e, 0x8, 0x0, 0xa3 } \\r
	24	}\r
	25	\r
	26	#define EFI_ARP_PROTOCOL_GUID \\r
	27	{ \\r
	28	0xf4b427bb, 0xba21, 0x4f16, {0xbc, 0x4e, 0x43, 0xe4, 0x16, 0xab, 0x61, 0x9c } \\r
	29	}\r
	30	\r
	31	typedef struct _EFI_ARP_PROTOCOL EFI_ARP_PROTOCOL;\r
	32	\r
	33	typedef struct {\r
	34	///\r
	35	/// Length in bytes of this entry.\r
	36	///\r
	37	UINT32 Size;\r
	38	\r
	39	///\r
	40	/// Set to TRUE if this entry is a "deny" entry.\r
	41	/// Set to FALSE if this entry is a "normal" entry.\r
	42	///\r
	43	BOOLEAN DenyFlag;\r
	44	\r
	45	///\r
	46	/// Set to TRUE if this entry will not time out.\r
	47	/// Set to FALSE if this entry will time out.\r
	48	///\r
	49	BOOLEAN StaticFlag;\r
	50	\r
	51	///\r
	52	/// 16-bit ARP hardware identifier number.\r
	53	///\r
	54	UINT16 HwAddressType;\r
	55	\r
	56	///\r
	57	/// 16-bit protocol type number.\r
	58	///\r
	59	UINT16 SwAddressType;\r
	60	\r
	61	///\r
	62	/// The length of the hardware address.\r
	63	///\r
	64	UINT8 HwAddressLength;\r
	65	\r
	66	///\r
	67	/// The length of the protocol address.\r
	68	///\r
	69	UINT8 SwAddressLength;\r
	70	} EFI_ARP_FIND_DATA;\r
	71	\r
	72	typedef struct {\r
	73	///\r
	74	/// 16-bit protocol type number in host byte order.\r
	75	///\r
	76	UINT16 SwAddressType;\r
	77	\r
	78	///\r
	79	/// The length in bytes of the station's protocol address to register.\r
	80	///\r
	81	UINT8 SwAddressLength;\r
	82	\r
	83	///\r
	84	/// The pointer to the first byte of the protocol address to register. For\r
	85	/// example, if SwAddressType is 0x0800 (IP), then\r
	86	/// StationAddress points to the first byte of this station's IP\r
	87	/// address stored in network byte order.\r
	88	///\r
	89	VOID *StationAddress;\r
	90	\r
	91	///\r
	92	/// The timeout value in 100-ns units that is associated with each\r
	93	/// new dynamic ARP cache entry. If it is set to zero, the value is\r
	94	/// implementation-specific.\r
	95	///\r
	96	UINT32 EntryTimeOut;\r
	97	\r
	98	///\r
	99	/// The number of retries before a MAC address is resolved. If it is\r
	100	/// set to zero, the value is implementation-specific.\r
	101	///\r
	102	UINT32 RetryCount;\r
	103	\r
	104	///\r
	105	/// The timeout value in 100-ns units that is used to wait for the ARP\r
	106	/// reply packet or the timeout value between two retries. Set to zero\r
	107	/// to use implementation-specific value.\r
	108	///\r
	109	UINT32 RetryTimeOut;\r
	110	} EFI_ARP_CONFIG_DATA;\r
	111	\r
	112	\r
	113	/**\r
	114	This function is used to assign a station address to the ARP cache for this instance\r
	115	of the ARP driver.\r
	116	\r
	117	Each ARP instance has one station address. The EFI_ARP_PROTOCOL driver will\r
	118	respond to ARP requests that match this registered station address. A call to\r
	119	this function with the ConfigData field set to NULL will reset this ARP instance.\r
	120	\r
	121	Once a protocol type and station address have been assigned to this ARP instance,\r
	122	all the following ARP functions will use this information. Attempting to change\r
	123	the protocol type or station address to a configured ARP instance will result in errors.\r
	124	\r
	125	@param This The pointer to the EFI_ARP_PROTOCOL instance.\r
	126	@param ConfigData The pointer to the EFI_ARP_CONFIG_DATA structure.\r
	127	\r
	128	@retval EFI_SUCCESS The new station address was successfully\r
	129	registered.\r
	130	@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:\r
	131	* This is NULL.\r
	132	* SwAddressLength is zero when ConfigData is not NULL.\r
	133	* StationAddress is NULL when ConfigData is not NULL.\r
	134	@retval EFI_ACCESS_DENIED The SwAddressType, SwAddressLength, or\r
	135	StationAddress is different from the one that is\r
	136	already registered.\r
	137	@retval EFI_OUT_OF_RESOURCES Storage for the new StationAddress could not be\r
	138	allocated.\r
	139	\r
	140	**/\r
	141	typedef\r
	142	EFI_STATUS\r
	143	(EFIAPI *EFI_ARP_CONFIGURE)(\r
	144	IN EFI_ARP_PROTOCOL *This,\r
	145	IN EFI_ARP_CONFIG_DATA *ConfigData OPTIONAL\r
	146	);\r
	147	\r
	148	/**\r
	149	This function is used to insert entries into the ARP cache.\r
	150	\r
	151	ARP cache entries are typically inserted and updated by network protocol drivers\r
	152	as network traffic is processed. Most ARP cache entries will time out and be\r
	153	deleted if the network traffic stops. ARP cache entries that were inserted\r
	154	by the Add() function may be static (will not time out) or dynamic (will time out).\r
	155	Default ARP cache timeout values are not covered in most network protocol\r
	156	specifications (although RFC 1122 comes pretty close) and will only be\r
	157	discussed in general terms in this specification. The timeout values that are\r
	158	used in the EFI Sample Implementation should be used only as a guideline.\r
	159	Final product implementations of the EFI network stack should be tuned for\r
	160	their expected network environments.\r
	161	\r
	162	@param This Pointer to the EFI_ARP_PROTOCOL instance.\r
	163	@param DenyFlag Set to TRUE if this entry is a deny entry. Set to\r
	164	FALSE if this entry is a normal entry.\r
	165	@param TargetSwAddress Pointer to a protocol address to add (or deny).\r
	166	May be set to NULL if DenyFlag is TRUE.\r
	167	@param TargetHwAddress Pointer to a hardware address to add (or deny).\r
	168	May be set to NULL if DenyFlag is TRUE.\r
	169	@param TimeoutValue Time in 100-ns units that this entry will remain\r
	170	in the ARP cache. A value of zero means that the\r
	171	entry is permanent. A nonzero value will override\r
	172	the one given by Configure() if the entry to be\r
	173	added is a dynamic entry.\r
	174	@param Overwrite If TRUE, the matching cache entry will be\r
	175	overwritten with the supplied parameters. If\r
	176	FALSE, EFI_ACCESS_DENIED is returned if the\r
	177	corresponding cache entry already exists.\r
	178	\r
	179	@retval EFI_SUCCESS The entry has been added or updated.\r
	180	@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:\r
	181	* This is NULL.\r
	182	* DenyFlag is FALSE and TargetHwAddress is NULL.\r
	183	* DenyFlag is FALSE and TargetSwAddress is NULL.\r
	184	* TargetHwAddress is NULL and TargetSwAddress is NULL.\r
	185	* Neither TargetSwAddress nor TargetHwAddress are NULL when DenyFlag is\r
	186	TRUE.\r
	187	@retval EFI_OUT_OF_RESOURCES The new ARP cache entry could not be allocated.\r
	188	@retval EFI_ACCESS_DENIED The ARP cache entry already exists and Overwrite\r
	189	is not true.\r
	190	@retval EFI_NOT_STARTED The ARP driver instance has not been configured.\r
	191	\r
	192	**/\r
	193	typedef\r
	194	EFI_STATUS\r
	195	(EFIAPI *EFI_ARP_ADD)(\r
	196	IN EFI_ARP_PROTOCOL *This,\r
	197	IN BOOLEAN DenyFlag,\r
	198	IN VOID *TargetSwAddress OPTIONAL,\r
	199	IN VOID *TargetHwAddress OPTIONAL,\r
	200	IN UINT32 TimeoutValue,\r
	201	IN BOOLEAN Overwrite\r
	202	);\r
	203	\r
	204	/**\r
	205	This function searches the ARP cache for matching entries and allocates a buffer into\r
	206	which those entries are copied.\r
	207	\r
	208	The first part of the allocated buffer is EFI_ARP_FIND_DATA, following which\r
	209	are protocol address pairs and hardware address pairs.\r
	210	When finding a specific protocol address (BySwAddress is TRUE and AddressBuffer\r
	211	is not NULL), the ARP cache timeout for the found entry is reset if Refresh is\r
	212	set to TRUE. If the found ARP cache entry is a permanent entry, it is not\r
	213	affected by Refresh.\r
	214	\r
	215	@param This The pointer to the EFI_ARP_PROTOCOL instance.\r
	216	@param BySwAddress Set to TRUE to look for matching software protocol\r
	217	addresses. Set to FALSE to look for matching\r
	218	hardware protocol addresses.\r
	219	@param AddressBuffer The pointer to the address buffer. Set to NULL\r
	220	to match all addresses.\r
	221	@param EntryLength The size of an entry in the entries buffer.\r
	222	@param EntryCount The number of ARP cache entries that are found by\r
	223	the specified criteria.\r
	224	@param Entries The pointer to the buffer that will receive the ARP\r
	225	cache entries.\r
	226	@param Refresh Set to TRUE to refresh the timeout value of the\r
	227	matching ARP cache entry.\r
	228	\r
	229	@retval EFI_SUCCESS The requested ARP cache entries were copied into\r
	230	the buffer.\r
	231	@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:\r
	232	This is NULL. Both EntryCount and EntryLength are\r
	233	NULL, when Refresh is FALSE.\r
	234	@retval EFI_NOT_FOUND No matching entries were found.\r
	235	@retval EFI_NOT_STARTED The ARP driver instance has not been configured.\r
	236	\r
	237	**/\r
	238	typedef\r
	239	EFI_STATUS\r
	240	(EFIAPI *EFI_ARP_FIND)(\r
	241	IN EFI_ARP_PROTOCOL *This,\r
	242	IN BOOLEAN BySwAddress,\r
	243	IN VOID *AddressBuffer OPTIONAL,\r
	244	OUT UINT32 *EntryLength OPTIONAL,\r
	245	OUT UINT32 *EntryCount OPTIONAL,\r
	246	OUT EFI_ARP_FIND_DATA **Entries OPTIONAL,\r
	247	IN BOOLEAN Refresh\r
	248	);\r
	249	\r
	250	\r
	251	/**\r
	252	This function removes specified ARP cache entries.\r
	253	\r
	254	@param This The pointer to the EFI_ARP_PROTOCOL instance.\r
	255	@param BySwAddress Set to TRUE to delete matching protocol addresses.\r
	256	Set to FALSE to delete matching hardware\r
	257	addresses.\r
	258	@param AddressBuffer The pointer to the address buffer that is used as a\r
	259	key to look for the cache entry. Set to NULL to\r
	260	delete all entries.\r
	261	\r
	262	@retval EFI_SUCCESS The entry was removed from the ARP cache.\r
	263	@retval EFI_INVALID_PARAMETER This is NULL.\r
	264	@retval EFI_NOT_FOUND The specified deletion key was not found.\r
	265	@retval EFI_NOT_STARTED The ARP driver instance has not been configured.\r
	266	\r
	267	**/\r
	268	typedef\r
	269	EFI_STATUS\r
	270	(EFIAPI *EFI_ARP_DELETE)(\r
	271	IN EFI_ARP_PROTOCOL *This,\r
	272	IN BOOLEAN BySwAddress,\r
	273	IN VOID *AddressBuffer OPTIONAL\r
	274	);\r
	275	\r
	276	/**\r
	277	This function delete all dynamic entries from the ARP cache that match the specified\r
	278	software protocol type.\r
	279	\r
	280	@param This The pointer to the EFI_ARP_PROTOCOL instance.\r
	281	\r
	282	@retval EFI_SUCCESS The cache has been flushed.\r
	283	@retval EFI_INVALID_PARAMETER This is NULL.\r
	284	@retval EFI_NOT_FOUND There are no matching dynamic cache entries.\r
	285	@retval EFI_NOT_STARTED The ARP driver instance has not been configured.\r
	286	\r
	287	**/\r
	288	typedef\r
	289	EFI_STATUS\r
	290	(EFIAPI *EFI_ARP_FLUSH)(\r
	291	IN EFI_ARP_PROTOCOL *This\r
	292	);\r
	293	\r
	294	/**\r
	295	This function tries to resolve the TargetSwAddress and optionally returns a\r
	296	TargetHwAddress if it already exists in the ARP cache.\r
	297	\r
	298	@param This The pointer to the EFI_ARP_PROTOCOL instance.\r
	299	@param TargetSwAddress The pointer to the protocol address to resolve.\r
	300	@param ResolvedEvent The pointer to the event that will be signaled when\r
	301	the address is resolved or some error occurs.\r
	302	@param TargetHwAddress The pointer to the buffer for the resolved hardware\r
	303	address in network byte order.\r
	304	\r
	305	@retval EFI_SUCCESS The data is copied from the ARP cache into the\r
	306	TargetHwAddress buffer.\r
	307	@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:\r
	308	This is NULL. TargetHwAddress is NULL.\r
	309	@retval EFI_ACCESS_DENIED The requested address is not present in the normal\r
	310	ARP cache but is present in the deny address list.\r
	311	Outgoing traffic to that address is forbidden.\r
	312	@retval EFI_NOT_STARTED The ARP driver instance has not been configured.\r
	313	@retval EFI_NOT_READY The request has been started and is not finished.\r
	314	\r
	315	**/\r
	316	typedef\r
	317	EFI_STATUS\r
	318	(EFIAPI *EFI_ARP_REQUEST)(\r
	319	IN EFI_ARP_PROTOCOL *This,\r
	320	IN VOID *TargetSwAddress OPTIONAL,\r
	321	IN EFI_EVENT ResolvedEvent OPTIONAL,\r
	322	OUT VOID *TargetHwAddress\r
	323	);\r
	324	\r
	325	/**\r
	326	This function aborts the previous ARP request (identified by This, TargetSwAddress\r
	327	and ResolvedEvent) that is issued by EFI_ARP_PROTOCOL.Request().\r
	328	\r
	329	If the request is in the internal ARP request queue, the request is aborted\r
	330	immediately and its ResolvedEvent is signaled. Only an asynchronous address\r
	331	request needs to be canceled. If TargeSwAddress and ResolveEvent are both\r
	332	NULL, all the pending asynchronous requests that have been issued by This\r
	333	instance will be cancelled and their corresponding events will be signaled.\r
	334	\r
	335	@param This The pointer to the EFI_ARP_PROTOCOL instance.\r
	336	@param TargetSwAddress The pointer to the protocol address in previous\r
	337	request session.\r
	338	@param ResolvedEvent Pointer to the event that is used as the\r
	339	notification event in previous request session.\r
	340	\r
	341	@retval EFI_SUCCESS The pending request session(s) is/are aborted and\r
	342	corresponding event(s) is/are signaled.\r
	343	@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:\r
	344	This is NULL. TargetSwAddress is not NULL and\r
	345	ResolvedEvent is NULL. TargetSwAddress is NULL and\r
	346	ResolvedEvent is not NULL.\r
	347	@retval EFI_NOT_STARTED The ARP driver instance has not been configured.\r
	348	@retval EFI_NOT_FOUND The request is not issued by\r
	349	EFI_ARP_PROTOCOL.Request().\r
	350	\r
	351	\r
	352	**/\r
	353	typedef\r
	354	EFI_STATUS\r
	355	(EFIAPI *EFI_ARP_CANCEL)(\r
	356	IN EFI_ARP_PROTOCOL *This,\r
	357	IN VOID *TargetSwAddress OPTIONAL,\r
	358	IN EFI_EVENT ResolvedEvent OPTIONAL\r
	359	);\r
	360	\r
	361	///\r
	362	/// ARP is used to resolve local network protocol addresses into\r
	363	/// network hardware addresses.\r
	364	///\r
	365	struct _EFI_ARP_PROTOCOL {\r
	366	EFI_ARP_CONFIGURE Configure;\r
	367	EFI_ARP_ADD Add;\r
	368	EFI_ARP_FIND Find;\r
	369	EFI_ARP_DELETE Delete;\r
	370	EFI_ARP_FLUSH Flush;\r
	371	EFI_ARP_REQUEST Request;\r
	372	EFI_ARP_CANCEL Cancel;\r
	373	};\r
	374	\r
	375	\r
	376	extern EFI_GUID gEfiArpServiceBindingProtocolGuid;\r
	377	extern EFI_GUID gEfiArpProtocolGuid;\r
	378	\r
	379	#endif\r