#include "ArpImpl.h"

Functions
EFI_STATUS EFIAPI	ArpConfigure (IN EFI_ARP_PROTOCOL This, IN EFI_ARP_CONFIG_DATA ConfigData OPTIONAL)

EFI_STATUS EFIAPI	ArpAdd (IN EFI_ARP_PROTOCOL This, IN BOOLEAN DenyFlag, IN VOID TargetSwAddress OPTIONAL, IN VOID *TargetHwAddress OPTIONAL, IN UINT32 TimeoutValue, IN BOOLEAN Overwrite)

EFI_STATUS EFIAPI	ArpFind (IN EFI_ARP_PROTOCOL This, IN BOOLEAN BySwAddress, IN VOID AddressBuffer OPTIONAL, OUT UINT32 EntryLength OPTIONAL, OUT UINT32 EntryCount OPTIONAL, OUT EFI_ARP_FIND_DATA **Entries OPTIONAL, IN BOOLEAN Refresh)

EFI_STATUS EFIAPI	ArpDelete (IN EFI_ARP_PROTOCOL This, IN BOOLEAN BySwAddress, IN VOID AddressBuffer OPTIONAL)

EFI_STATUS EFIAPI	ArpFlush (IN EFI_ARP_PROTOCOL *This)

EFI_STATUS EFIAPI	ArpRequest (IN EFI_ARP_PROTOCOL This, IN VOID TargetSwAddress OPTIONAL, IN EFI_EVENT ResolvedEvent OPTIONAL, OUT VOID *TargetHwAddress)

EFI_STATUS EFIAPI	ArpCancel (IN EFI_ARP_PROTOCOL This, IN VOID TargetSwAddress OPTIONAL, IN EFI_EVENT ResolvedEvent OPTIONAL)

Detailed Description

Implementation of EFI Address Resolution Protocol (ARP) Protocol interface functions.

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file ArpMain.c.

Function Documentation

◆ ArpAdd()

EFI_STATUS EFIAPI ArpAdd	(	IN EFI_ARP_PROTOCOL *	This,
		IN BOOLEAN	DenyFlag,
		IN VOID *TargetSwAddress	OPTIONAL,
		IN VOID *TargetHwAddress	OPTIONAL,
		IN UINT32	TimeoutValue,
		IN BOOLEAN	Overwrite
	)

This function is used to insert entries into the ARP cache.

ARP cache entries are typically inserted and updated by network protocol drivers as network traffic is processed. Most ARP cache entries will time out and be deleted if the network traffic stops. ARP cache entries that were inserted by the Add() function may be static (will not time out) or dynamic (will time out). Default ARP cache timeout values are not covered in most network protocol specifications (although RFC 1122 comes pretty close) and will only be discussed in general in this specification. The timeout values that are used in the EFI Sample Implementation should be used only as a guideline. Final product implementations of the EFI network stack should be tuned for their expected network environments.

Parameters

This	Pointer to the EFI_ARP_PROTOCOL instance.
DenyFlag	Set to TRUE if this entry is a deny entry. Set to FALSE if this entry is a normal entry.
TargetSwAddress	Pointer to a protocol address to add (or deny). May be set to NULL if DenyFlag is TRUE.
TargetHwAddress	Pointer to a hardware address to add (or deny). May be set to NULL if DenyFlag is TRUE.
TimeoutValue	Time in 100-ns units that this entry will remain in the ARP cache. A value of zero means that the entry is permanent. A nonzero value will override the one given by Configure() if the entry to be added is a dynamic entry.
Overwrite	If TRUE, the matching cache entry will be overwritten with the supplied parameters. If FALSE, EFI_ACCESS_DENIED is returned if the corresponding cache entry already exists.

Return values

EFI_SUCCESS	The entry has been added or updated.
EFI_INVALID_PARAMETER	One or more of the following conditions is TRUE: This is NULL. DenyFlag is FALSE and TargetHwAddress is NULL. DenyFlag is FALSE and TargetSwAddress is NULL. TargetHwAddress is NULL and TargetSwAddress is NULL. Both TargetSwAddress and TargetHwAddress are not NULL when DenyFlag is TRUE.
EFI_OUT_OF_RESOURCES	The new ARP cache entry could not be allocated.
EFI_ACCESS_DENIED	The ARP cache entry already exists and Overwrite is not true.
EFI_NOT_STARTED	The ARP driver instance has not been configured.

Definition at line 123 of file ArpMain.c.

◆ ArpCancel()

EFI_STATUS EFIAPI ArpCancel	(	IN EFI_ARP_PROTOCOL *	This,
		IN VOID *TargetSwAddress	OPTIONAL,
		IN EFI_EVENT ResolvedEvent	OPTIONAL
	)

This function aborts the previous ARP request (identified by This, TargetSwAddress and ResolvedEvent) that is issued by EFI_ARP_PROTOCOL.Request().

If the request is in the internal ARP request queue, the request is aborted immediately and its ResolvedEvent is signaled. Only an asynchronous address request needs to be canceled. If TargetSwAddress and ResolvedEvent are both NULL, all the pending asynchronous requests that have been issued by This instance will be cancelled and their corresponding events will be signaled.

Parameters

This	Pointer to the EFI_ARP_PROTOCOL instance.
TargetSwAddress	Pointer to the protocol address in previous request session.
ResolvedEvent	Pointer to the event that is used as the notification event in previous request session.

Return values

EFI_SUCCESS	The pending request session(s) is/are aborted and corresponding event(s) is/are signaled.
EFI_INVALID_PARAMETER	One or more of the following conditions is TRUE: This is NULL. TargetSwAddress is not NULL and ResolvedEvent is NULL. TargetSwAddress is NULL and ResolvedEvent is not NULL.
EFI_NOT_STARTED	The ARP driver instance has not been configured.
EFI_NOT_FOUND	The request is not issued by EFI_ARP_PROTOCOL.Request().

Definition at line 698 of file ArpMain.c.

◆ ArpConfigure()

EFI_STATUS EFIAPI ArpConfigure	(	IN EFI_ARP_PROTOCOL *	This,
		IN EFI_ARP_CONFIG_DATA *ConfigData	OPTIONAL
	)

This function is used to assign a station address to the ARP cache for this instance of the ARP driver.

Each ARP instance has one station address. The EFI_ARP_PROTOCOL driver will respond to ARP requests that match this registered station address. A call to this function with the ConfigData field set to NULL will reset this ARP instance.

Once a protocol type and station address have been assigned to this ARP instance, all the following ARP functions will use this information. Attempting to change the protocol type or station address to a configured ARP instance will result in errors.

Parameters

This	Pointer to the EFI_ARP_PROTOCOL instance.
ConfigData	Pointer to the EFI_ARP_CONFIG_DATA structure.

Return values

EFI_SUCCESS	The new station address was successfully registered.
EFI_INVALID_PARAMETER	One or more of the following conditions is TRUE: This is NULL. SwAddressLength is zero when ConfigData is not NULL. StationAddress is NULL when ConfigData is not NULL.
EFI_ACCESS_DENIED	The SwAddressType, SwAddressLength, or StationAddress is different from the one that is already registered.
EFI_OUT_OF_RESOURCES	Storage for the new StationAddress could not be allocated.

Definition at line 41 of file ArpMain.c.

◆ ArpDelete()

EFI_STATUS EFIAPI ArpDelete	(	IN EFI_ARP_PROTOCOL *	This,
		IN BOOLEAN	BySwAddress,
		IN VOID *AddressBuffer	OPTIONAL
	)

This function removes specified ARP cache entries.

Parameters

This	Pointer to the EFI_ARP_PROTOCOL instance.
BySwAddress	Set to TRUE to delete matching protocol addresses. Set to FALSE to delete matching hardware addresses.
AddressBuffer	Pointer to the address buffer that is used as a key to look for the cache entry. Set to NULL to delete all entries.

Return values

EFI_SUCCESS	The entry was removed from the ARP cache.
EFI_INVALID_PARAMETER	This is NULL.
EFI_NOT_FOUND	The specified deletion key was not found.
EFI_NOT_STARTED	The ARP driver instance has not been configured.

Definition at line 376 of file ArpMain.c.

◆ ArpFind()

EFI_STATUS EFIAPI ArpFind	(	IN EFI_ARP_PROTOCOL *	This,
		IN BOOLEAN	BySwAddress,
		IN VOID *AddressBuffer	OPTIONAL,
		OUT UINT32 *EntryLength	OPTIONAL,
		OUT UINT32 *EntryCount	OPTIONAL,
		OUT EFI_ARP_FIND_DATA **Entries	OPTIONAL,
		IN BOOLEAN	Refresh
	)

This function searches the ARP cache for matching entries and allocates a buffer into which those entries are copied.

The first part of the allocated buffer is EFI_ARP_FIND_DATA, following which are protocol address pairs and hardware address pairs. When finding a specific protocol address (BySwAddress is TRUE and AddressBuffer is not NULL), the ARP cache timeout for the found entry is reset if Refresh is set to TRUE. If the found ARP cache entry is a permanent entry, it is not affected by Refresh.

Parameters

This	Pointer to the EFI_ARP_PROTOCOL instance.
BySwAddress	Set to TRUE to look for matching software protocol addresses. Set to FALSE to look for matching hardware protocol addresses.
AddressBuffer	Pointer to address buffer. Set to NULL to match all addresses.
EntryLength	The size of an entry in the entries buffer.
EntryCount	The number of ARP cache entries that are found by the specified criteria.
Entries	Pointer to the buffer that will receive the ARP cache entries.
Refresh	Set to TRUE to refresh the timeout value of the matching ARP cache entry.

Return values

EFI_SUCCESS	The requested ARP cache entries were copied into the buffer.
EFI_INVALID_PARAMETER	One or more of the following conditions is TRUE: This is NULL. Both EntryCount and EntryLength are NULL, when Refresh is FALSE.
EFI_NOT_FOUND	No matching entries were found.
EFI_NOT_STARTED	The ARP driver instance has not been configured.

Definition at line 310 of file ArpMain.c.

◆ ArpFlush()

EFI_STATUS EFIAPI ArpFlush ( IN EFI_ARP_PROTOCOL * This )

This function delete all dynamic entries from the ARP cache that match the specified software protocol type.

Parameters

This	Pointer to the EFI_ARP_PROTOCOL instance.

Return values

EFI_SUCCESS	The cache has been flushed.
EFI_INVALID_PARAMETER	This is NULL.
EFI_NOT_FOUND	There are no matching dynamic cache entries.
EFI_NOT_STARTED	The ARP driver instance has not been configured.

Definition at line 422 of file ArpMain.c.

◆ ArpRequest()

EFI_STATUS EFIAPI ArpRequest	(	IN EFI_ARP_PROTOCOL *	This,
		IN VOID *TargetSwAddress	OPTIONAL,
		IN EFI_EVENT ResolvedEvent	OPTIONAL,
		OUT VOID *	TargetHwAddress
	)

This function tries to resolve the TargetSwAddress and optionally returns a TargetHwAddress if it already exists in the ARP cache.

Parameters

This	Pointer to the EFI_ARP_PROTOCOL instance.
TargetSwAddress	Pointer to the protocol address to resolve.
ResolvedEvent	Pointer to the event that will be signaled when the address is resolved or some error occurs.
TargetHwAddress	Pointer to the buffer for the resolved hardware address in network byte order.

Return values

EFI_SUCCESS	The data is copied from the ARP cache into the TargetHwAddress buffer.
EFI_INVALID_PARAMETER	One or more of the following conditions is TRUE: This is NULL. TargetHwAddress is NULL.
EFI_ACCESS_DENIED	The requested address is not present in the normal ARP cache but is present in the deny address list. Outgoing traffic to that address is forbidden.
EFI_NOT_STARTED	The ARP driver instance has not been configured.
EFI_NOT_READY	The request has been started and is not finished.

Definition at line 476 of file ArpMain.c.

Functions

Detailed Description

Function Documentation

◆ ArpAdd()

◆ ArpCancel()

◆ ArpConfigure()

◆ ArpDelete()

◆ ArpFind()

◆ ArpFlush()

◆ ArpRequest()