Dhcp6.h File Reference

Data Structures
struct	EFI_DHCP6_PACKET_OPTION
struct	EFI_DHCP6_HEADER
struct	EFI_DHCP6_PACKET
struct	EFI_DHCP6_DUID
struct	EFI_DHCP6_RETRANSMISSION
struct	EFI_DHCP6_IA_ADDRESS
struct	EFI_DHCP6_IA_DESCRIPTOR
struct	EFI_DHCP6_IA
struct	EFI_DHCP6_MODE_DATA
struct	EFI_DHCP6_CONFIG_DATA
struct	_EFI_DHCP6_PROTOCOL

Macros
#define	EFI_DHCP6_PROTOCOL_GUID
#define	EFI_DHCP6_SERVICE_BINDING_PROTOCOL_GUID
#define	EFI_DHCP6_IA_TYPE_NA   3
#define	EFI_DHCP6_IA_TYPE_TA   4

Typedefs
typedef struct _EFI_DHCP6_PROTOCOL	EFI_DHCP6_PROTOCOL
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_CALLBACK )(IN EFI_DHCP6_PROTOCOL *This, IN VOID *Context, IN EFI_DHCP6_STATE CurrentState, IN EFI_DHCP6_EVENT Dhcp6Event, IN EFI_DHCP6_PACKET *Packet, OUT EFI_DHCP6_PACKET **NewPacket)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_INFO_CALLBACK )(IN EFI_DHCP6_PROTOCOL *This, IN VOID *Context, IN EFI_DHCP6_PACKET *Packet)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_GET_MODE_DATA )(IN EFI_DHCP6_PROTOCOL *This, OUT EFI_DHCP6_MODE_DATA *Dhcp6ModeData, OUT EFI_DHCP6_CONFIG_DATA *Dhcp6ConfigData)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_CONFIGURE )(IN EFI_DHCP6_PROTOCOL *This, IN EFI_DHCP6_CONFIG_DATA *Dhcp6CfgData)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_START )(IN EFI_DHCP6_PROTOCOL *This)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_INFO_REQUEST )(IN EFI_DHCP6_PROTOCOL *This, IN BOOLEAN SendClientId, IN EFI_DHCP6_PACKET_OPTION *OptionRequest, IN UINT32 OptionCount, IN EFI_DHCP6_PACKET_OPTION *OptionList[], IN EFI_DHCP6_RETRANSMISSION *Retransmission, IN EFI_EVENT TimeoutEvent, IN EFI_DHCP6_INFO_CALLBACK ReplyCallback, IN VOID *CallbackContext)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_RENEW_REBIND )(IN EFI_DHCP6_PROTOCOL *This, IN BOOLEAN RebindRequest)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_DECLINE )(IN EFI_DHCP6_PROTOCOL *This, IN UINT32 AddressCount, IN EFI_IPv6_ADDRESS *Addresses)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_RELEASE )(IN EFI_DHCP6_PROTOCOL *This, IN UINT32 AddressCount, IN EFI_IPv6_ADDRESS *Addresses)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_STOP )(IN EFI_DHCP6_PROTOCOL *This)
typedef EFI_STATUS(EFIAPI *	EFI_DHCP6_PARSE )(IN EFI_DHCP6_PROTOCOL *This, IN EFI_DHCP6_PACKET *Packet, IN OUT UINT32 *OptionCount, OUT EFI_DHCP6_PACKET_OPTION *PacketOptionList[])

Enumerations
enum	EFI_DHCP6_STATE {   Dhcp6Init = 0x0, Dhcp6Selecting = 0x1, Dhcp6Requesting = 0x2, Dhcp6Declining = 0x3,   Dhcp6Confirming = 0x4, Dhcp6Releasing = 0x5, Dhcp6Bound = 0x6, Dhcp6Renewing = 0x7,   Dhcp6Rebinding = 0x8 }
enum	EFI_DHCP6_EVENT {   Dhcp6SendSolicit = 0x0, Dhcp6RcvdAdvertise = 0x1, Dhcp6SelectAdvertise = 0x2, Dhcp6SendRequest = 0x3,   Dhcp6RcvdReply = 0x4, Dhcp6RcvdReconfigure = 0x5, Dhcp6SendDecline = 0x6, Dhcp6SendConfirm = 0x7,   Dhcp6SendRelease = 0x8, Dhcp6EnterRenewing = 0x9, Dhcp6EnterRebinding = 0xa }

Variables
EFI_GUID	gEfiDhcp6ProtocolGuid
EFI_GUID	gEfiDhcp6ServiceBindingProtocolGuid

Detailed Description

UEFI Dynamic Host Configuration Protocol 6 Definition, which is used to get IPv6 addresses and other configuration parameters from DHCPv6 servers.

Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Revision Reference:

This Protocol is introduced in UEFI Specification 2.2

Macro Definition Documentation

#define EFI_DHCP6_IA_TYPE_NA   3

An IA which carries assigned not temporary address.

#define EFI_DHCP6_IA_TYPE_TA   4

An IA which carries assigned temporary address.

#define EFI_DHCP6_PROTOCOL_GUID

Value:

{ \
    0x87c8bad7, 0x595, 0x4053, {0x82, 0x97, 0xde, 0xde, 0x39, 0x5f, 0x5d, 0x5b } \
  }

#define EFI_DHCP6_SERVICE_BINDING_PROTOCOL_GUID

Value:

{ \
    0x9fb9a8a1, 0x2f4a, 0x43a6, {0x88, 0x9c, 0xd0, 0xf7, 0xb6, 0xc4, 0x7a, 0xd5 } \
  }

Typedef Documentation

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_CALLBACK)(IN EFI_DHCP6_PROTOCOL *This, IN VOID *Context, IN EFI_DHCP6_STATE CurrentState, IN EFI_DHCP6_EVENT Dhcp6Event, IN EFI_DHCP6_PACKET *Packet, OUT EFI_DHCP6_PACKET **NewPacket)

EFI_DHCP6_CALLBACK is provided by the consumer of the EFI DHCPv6 Protocol instance to intercept events that occurs in the DHCPv6 S.A.R.R process.

Parameters

[in]	This	Pointer to the EFI_DHCP6_PROTOCOL instance that is used to configure this callback function.
[in]	Context	Pointer to the context that is initialized by EFI_DHCP6_PROTOCOL.Configure().
[in]	CurrentState	The current state of the configured IA.
[in]	Dhcp6Event	The event that occurs in the current state, which usually means a state transition.
[in]	Packet	Pointer to the DHCPv6 packet that is about to be sent or has been received. The EFI DHCPv6 Protocol instance is responsible for freeing the buffer.
[out]	NewPacket	Pointer to the new DHCPv6 packet to overwrite the Packet. NewPacket can not share the buffer with Packet. If *NewPacket is not NULL, the EFI DHCPv6 Protocol instance is responsible for freeing the buffer.

Return values

EFI_SUCCESS	Tell the EFI DHCPv6 Protocol instance to continue the DHCPv6 S.A.R.R process.
EFI_ABORTED	Tell the EFI DHCPv6 Protocol instance to abort the DHCPv6 S.A.R.R process, and the state of the configured IA will be transferred to Dhcp6Init.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_CONFIGURE)(IN EFI_DHCP6_PROTOCOL *This, IN EFI_DHCP6_CONFIG_DATA *Dhcp6CfgData)

Initialize or clean up the configuration data for the EFI DHCPv6 Protocol instance.

The Configure() function is used to initialize or clean up the configuration data of the EFI DHCPv6 Protocol instance.

• When Dhcp6CfgData is not NULL and Configure() is called successfully, the configuration data will be initialized in the EFI DHCPv6 Protocol instance and the state of the configured IA will be transferred into Dhcp6Init.
• When Dhcp6CfgData is NULL and Configure() is called successfully, the configuration data will be cleaned up and no IA will be associated with the EFI DHCPv6 Protocol instance.

To update the configuration data for an EFI DCHPv6 Protocol instance, the original data must be cleaned up before setting the new configuration data.

Parameters

[in]	This	Pointer to the EFI_DHCP6_PROTOCOL instance.
[in]	Dhcp6CfgData	Pointer to the DHCPv6 configuration data structure.

Return values

EFI_SUCCESS	The mode data was returned.
EFI_INVALID_PARAMETER	One or more following conditions are TRUE This is NULL. OptionCount > 0 and OptionList is NULL. OptionList is not NULL, and Client Id option, Reconfigure Accept option, Rapid Commit option or any IA option is specified in the OptionList. IaDescriptor.Type is neither EFI_DHCP6_IA_TYPE_NA nor EFI_DHCP6_IA_TYPE_NA. IaDescriptor is not unique. Both IaInfoEvent and SolicitRetransimssion are NULL. SolicitRetransmission is not NULL, and both SolicitRetransimssion->Mrc and SolicitRetransmission->Mrd are zero.
EFI_ACCESS_DENIED	The EFI DHCPv6 Protocol instance has been already configured when Dhcp6CfgData is not NULL. The EFI DHCPv6 Protocol instance has already started the DHCPv6 S.A.R.R when Dhcp6CfgData is NULL.
EFI_OUT_OF_RESOURCES	Required system resources could not be allocated.
EFI_DEVICE_ERROR	An unexpected system or network error occurred.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_DECLINE)(IN EFI_DHCP6_PROTOCOL *This, IN UINT32 AddressCount, IN EFI_IPv6_ADDRESS *Addresses)

Inform that one or more IPv6 addresses assigned by a server are already in use by another node.

The Decline() function is used to manually decline the assignment of IPv6 addresses, which have been already used by another node. If all IPv6 addresses of the configured IA are declined through this function, the state of the IA will switch through Dhcp6Declining to Dhcp6Init, otherwise, the state of the IA will restore to Dhcp6Bound after the declining process. The Decline() can only be called when the IA is in Dhcp6Bound state. If the EFI_DHCP6_CONFIG_DATA.IaInfoEvent is NULL, this function is a blocking operation. It will return after the declining process finishes, or aborted by user.

Parameters

[in]	This	Pointer to the EFI_DHCP4_PROTOCOL instance.
[in]	AddressCount	Number of declining IPv6 addresses.
[in]	Addresses	Pointer to the buffer stored all the declining IPv6 addresses.

Return values

EFI_SUCCESS	The DHCPv6 decline exchange process has completed when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is NULL. The EFI DHCPv6 Protocol instance has sent Decline packet when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is not NULL.
EFI_INVALID_PARAMETER	One or more following conditions are TRUE This is NULL. AddressCount is zero or Addresses is NULL.
EFI_NOT_FOUND	Any specified IPv6 address is not correlated with the configured IA for this instance.
EFI_ACCESS_DENIED	The EFI DHCPv6 Child instance hasn't been configured, or the state of the configured IA is not in Dhcp6Bound.
EFI_DEVICE_ERROR	An unexpected network or system error occurred.
EFI_ABORTED	The DHCPv6 decline exchange process aborted by user.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_GET_MODE_DATA)(IN EFI_DHCP6_PROTOCOL *This, OUT EFI_DHCP6_MODE_DATA *Dhcp6ModeData, OUT EFI_DHCP6_CONFIG_DATA *Dhcp6ConfigData)

Retrieve the current operating mode data and configuration data for the EFI DHCPv6 Protocol instance.

Parameters

[in]	This	Pointer to the EFI_DHCP6_PROTOCOL instance.
[out]	Dhcp6ModeData	Pointer to the DHCPv6 mode data structure. The caller is responsible for freeing this structure and each reference buffer.
[out]	Dhcp6ConfigData	Pointer to the DHCPv6 configuration data structure. The caller is responsible for freeing this structure and each reference buffer.

Return values

EFI_SUCCESS	The mode data was returned.
EFI_ACCESS_DENIED	The EFI DHCPv6 Protocol instance has not been configured when Dhcp6ConfigData is not NULL.
EFI_INVALID_PARAMETER	One or more following conditions are TRUE: This is NULL. Both Dhcp6ConfigData and Dhcp6ModeData are NULL.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_INFO_CALLBACK)(IN EFI_DHCP6_PROTOCOL *This, IN VOID *Context, IN EFI_DHCP6_PACKET *Packet)

EFI_DHCP6_INFO_CALLBACK is provided by the consumer of the EFI DHCPv6 Protocol instance to intercept events that occurs in the DHCPv6 Information Request exchange process.

Parameters

[in]	This	Pointer to the EFI_DHCP6_PROTOCOL instance that is used to configure this callback function.
[in]	Context	Pointer to the context that is initialized in the EFI_DHCP6_PROTOCOL.InfoRequest().
[in]	Packet	Pointer to Reply packet that has been received. The EFI DHCPv6 Protocol instance is responsible for freeing the buffer.

Return values

EFI_SUCCESS	Tell the EFI DHCPv6 Protocol instance to finish Information Request exchange process.
EFI_NOT_READY	Tell the EFI DHCPv6 Protocol instance to continue Information Request exchange process.
EFI_ABORTED	Tell the EFI DHCPv6 Protocol instance to abort the Information Request exchange process.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_INFO_REQUEST)(IN EFI_DHCP6_PROTOCOL *This, IN BOOLEAN SendClientId, IN EFI_DHCP6_PACKET_OPTION *OptionRequest, IN UINT32 OptionCount, IN EFI_DHCP6_PACKET_OPTION *OptionList[], IN EFI_DHCP6_RETRANSMISSION *Retransmission, IN EFI_EVENT TimeoutEvent, IN EFI_DHCP6_INFO_CALLBACK ReplyCallback, IN VOID *CallbackContext)

Request configuration information without the assignment of any IA addresses of the client.

The InfoRequest() function is used to request configuration information without the assignment of any IPv6 address of the client. Client sends out Information Request packet to obtain the required configuration information, and DHCPv6 server responds with Reply packet containing the information for the client. The received Reply packet will be passed to the user by ReplyCallback function. If user returns EFI_NOT_READY from ReplyCallback, the EFI DHCPv6 Protocol instance will continue to receive other Reply packets unless timeout according to the Retransmission parameter. Otherwise, the Information Request exchange process will be finished successfully if user returns EFI_SUCCESS from ReplyCallback.

Parameters

[in]	This	Pointer to the EFI_DHCP6_PROTOCOL instance.
[in]	SendClientId	If TRUE, the EFI DHCPv6 Protocol instance will build Client Identifier option and include it into Information Request packet. If FALSE, Client Identifier option will not be included. Client Identifier option can not be specified through OptionList parameter.
[in]	OptionRequest	Pointer to the Option Request option in the Information Request packet. Option Request option can not be specified through OptionList parameter.
[in]	OptionCount	Number of options in OptionList.
[in]	OptionList	List of other DHCPv6 options. These options will be appended to the Option Request option. The caller is responsible for freeing this buffer. Type is defined in EFI_DHCP6_PROTOCOL.GetModeData().
[in]	Retransmission	Parameter to control Information Request packet retransmission behavior. The buffer can be freed after EFI_DHCP6_PROTOCOL.InfoRequest() returns.
[in]	TimeoutEvent	If not NULL, this event is signaled when the information request exchange aborted because of no response. If NULL, the function call is a blocking operation; and it will return after the information-request exchange process finish or aborted by users.
[in]	ReplyCallback	The callback function is to intercept various events that occur in the Information Request exchange process. It should not be set to NULL.
[in]	CallbackContext	Pointer to the context that will be passed to ReplyCallback.

Return values

EFI_SUCCESS	The DHCPv6 S.A.R.R process is completed and at least one IPv6
EFI_SUCCESS	The DHCPv6 information request exchange process completed when TimeoutEvent is NULL. Information Request packet has been sent to DHCPv6 server when TimeoutEvent is not NULL.
EFI_INVALID_PARAMETER	One or more following conditions are TRUE: This is NULL. OptionRequest is NULL or OptionRequest->OpCode is invalid. OptionCount > 0 and OptionList is NULL. OptionList is not NULL, and Client Identify option or Option Request option is specified in the OptionList. Retransimssion is NULL. Both Retransimssion->Mrc and Retransmission->Mrd are zero. ReplyCallback is NULL.
EFI_DEVICE_ERROR	An unexpected network or system error occurred.
EFI_NO_RESPONSE	The DHCPv6 information request exchange process failed because of no response, or not all requested-options are responded by DHCPv6 servers when Timeout happened.
EFI_ABORTED	The DHCPv6 information request exchange process aborted by user.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_PARSE)(IN EFI_DHCP6_PROTOCOL *This, IN EFI_DHCP6_PACKET *Packet, IN OUT UINT32 *OptionCount, OUT EFI_DHCP6_PACKET_OPTION *PacketOptionList[])

Parse the option data in the DHCPv6 packet.

The Parse() function is used to retrieve the option list in the DHCPv6 packet.

Parameters

[in]	This	Pointer to the EFI_DHCP6_PROTOCOL instance.
[in]	Packet	Pointer to packet to be parsed.
[in]	OptionCount	On input, the number of entries in the PacketOptionList. On output, the number of DHCPv6 options in the Packet.
[in]	PacketOptionList	List of pointers to the DHCPv6 options in the Packet. The OpCode and OpLen in EFI_DHCP6_PACKET_OPTION are both stored in network byte order.

Return values

EFI_SUCCESS	The packet was successfully parsed.
EFI_INVALID_PARAMETER	One or more following conditions are TRUE This is NULL. Packet is NULL. Packet is not a well-formed DHCPv6 packet. OptionCount is NULL. *OptionCount is not zero and PacketOptionList is NULL.
EFI_BUFFER_TOO_SMALL	*OptionCount is smaller than the number of options that were found in the Packet.

typedef struct _EFI_DHCP6_PROTOCOL EFI_DHCP6_PROTOCOL

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_RELEASE)(IN EFI_DHCP6_PROTOCOL *This, IN UINT32 AddressCount, IN EFI_IPv6_ADDRESS *Addresses)

Release one or more IPv6 addresses associated with the configured IA for current instance.

The Release() function is used to manually release the one or more IPv6 address. If AddressCount is zero, it will release all IPv6 addresses of the configured IA. If all IPv6 addresses of the IA are released through this function, the state of the IA will switch through Dhcp6Releasing to Dhcp6Init, otherwise, the state of the IA will restore to Dhcp6Bound after the releasing process. The Release() can only be called when the IA is in Dhcp6Bound state. If the EFI_DHCP6_CONFIG_DATA.IaInfoEvent is NULL, the function is a blocking operation. It will return after the releasing process finishes, or aborted by user.

Parameters

[in]	This	Pointer to the EFI_DHCP6_PROTOCOL instance.
[in]	AddressCount	Number of releasing IPv6 addresses.
[in]	Addresses	Pointer to the buffer stored all the releasing IPv6 addresses. Ignored if AddressCount is zero.

Return values

EFI_SUCCESS	The DHCPv6 release exchange process has completed when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is NULL. The EFI DHCPv6 Protocol instance has sent Release packet when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is not NULL.
EFI_INVALID_PARAMETER	One or more following conditions are TRUE This is NULL. AddressCount is not zero or Addresses is NULL.
EFI_NOT_FOUND	Any specified IPv6 address is not correlated with the configured IA for this instance.
EFI_ACCESS_DENIED	The EFI DHCPv6 Child instance hasn't been configured, or the state of the configured IA is not in Dhcp6Bound.
EFI_DEVICE_ERROR	An unexpected network or system error occurred.
EFI_ABORTED	The DHCPv6 release exchange process aborted by user.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_RENEW_REBIND)(IN EFI_DHCP6_PROTOCOL *This, IN BOOLEAN RebindRequest)

Manually extend the valid and preferred lifetimes for the IPv6 addresses of the configured IA and update other configuration parameters by sending Renew or Rebind packet.

The RenewRebind() function is used to manually extend the valid and preferred lifetimes for the IPv6 addresses of the configured IA and update other configuration parameters by sending Renew or Rebind packet.

• When RebindRequest is FALSE and the state of the configured IA is Dhcp6Bound, it will send Renew packet to the previously DHCPv6 server and transfer the state of the configured IA to Dhcp6Renewing. If valid Reply packet received, the state transfers to Dhcp6Bound and the valid and preferred timer restarts. If fails, the state transfers to Dhcp6Bound but the timer continues.
• When RebindRequest is TRUE and the state of the configured IA is Dhcp6Bound, it will send Rebind packet. If valid Reply packet received, the state transfers to Dhcp6Bound and the valid and preferred timer restarts. If fails, the state transfers to Dhcp6Init and the IA can't be used.

Parameters

[in]	This	Pointer to the EFI_DHCP4_PROTOCOL instance.
[in]	RebindRequest	If TRUE, it will send Rebind packet and enter the Dhcp6Rebinding state. Otherwise, it will send Renew packet and enter the Dhcp6Renewing state.

Return values

EFI_SUCCESS	The DHCPv6 renew/rebind exchange process has completed and at least one IPv6 address of the configured IA has been bound again when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is NULL. The EFI DHCPv6 Protocol instance has sent Renew or Rebind packet when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is not NULL.
EFI_ACCESS_DENIED	The EFI DHCPv6 Child instance hasn't been configured, or the state of the configured IA is not in Dhcp6Bound.
EFI_ALREADY_STARTED	The state of the configured IA has already entered Dhcp6Renewing when RebindRequest is FALSE. The state of the configured IA has already entered Dhcp6Rebinding when RebindRequest is TRUE.
EFI_INVALID_PARAMETER	This is NULL.
EFI_DEVICE_ERROR	An unexpected system or system error occurred.
EFI_NO_RESPONSE	The DHCPv6 renew/rebind exchange process failed because of no response.
EFI_NO_MAPPING	No IPv6 address has been bound to the configured IA after the DHCPv6 renew/rebind exchange process.
EFI_ABORTED	The DHCPv6 renew/rebind exchange process aborted by user.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_START)(IN EFI_DHCP6_PROTOCOL *This)

Start the DHCPv6 S.A.R.R process.

The Start() function starts the DHCPv6 S.A.R.R process. This function can be called only when the state of the configured IA is in the Dhcp6Init state. If the DHCPv6 S.A.R.R process completes successfully, the state of the configured IA will be transferred through Dhcp6Selecting and Dhcp6Requesting to Dhcp6Bound state. The update of the IPv6 addresses will be notified through EFI_DHCP6_CONFIG_DATA.IaInfoEvent. At the time when each event occurs in this process, the callback function set by EFI_DHCP6_PROTOCOL.Configure() will be called and the user can take this opportunity to control the process. If EFI_DHCP6_CONFIG_DATA.IaInfoEvent is NULL, the Start() function call is a blocking operation. It will return after the DHCPv6 S.A.R.R process completes or aborted by users. If the process is aborted by system or network error, the state of the configured IA will be transferred to Dhcp6Init. The Start() function can be called again to restart the process.

Parameters

[in]

This

Pointer to the EFI_DHCP6_PROTOCOL instance.

Return values

EFI_SUCCESS	The DHCPv6 S.A.R.R process is completed and at least one IPv6 address has been bound to the configured IA when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is NULL. The DHCPv6 S.A.R.R process is started when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is not NULL.
EFI_ACCESS_DENIED	The EFI DHCPv6 Child instance hasn't been configured.
EFI_INVALID_PARAMETER	This is NULL.
EFI_OUT_OF_RESOURCES	Required system resources could not be allocated.
EFI_ALREADY_STARTED	The DHCPv6 S.A.R.R process has already started.
EFI_DEVICE_ERROR	An unexpected network or system error occurred.
EFI_NO_RESPONSE	The DHCPv6 S.A.R.R process failed because of no response.
EFI_NO_MAPPING	No IPv6 address has been bound to the configured IA after the DHCPv6 S.A.R.R process.
EFI_ABORTED	The DHCPv6 S.A.R.R process aborted by user.
EFI_NO_MEDIA	There was a media error.

typedef EFI_STATUS(EFIAPI * EFI_DHCP6_STOP)(IN EFI_DHCP6_PROTOCOL *This)

Stop the DHCPv6 S.A.R.R process.

The Stop() function is used to stop the DHCPv6 S.A.R.R process. If this function is called successfully, all the IPv6 addresses of the configured IA will be released and the state of the configured IA will be transferred to Dhcp6Init.

Parameters

[in]

This

Pointer to the EFI_DHCP6_PROTOCOL instance.

Return values

EFI_SUCCESS	The DHCPv6 S.A.R.R process has been stopped when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is NULL. The EFI DHCPv6 Protocol instance has sent Release packet if need release or has been stopped if needn't, when EFI_DHCP6_CONFIG_DATA.IaInfoEvent is not NULL.
EFI_INVALID_PARAMETER	This is NULL.

Enumeration Type Documentation

enum EFI_DHCP6_EVENT

Enumerator
Dhcp6SendSolicit	A Solicit packet is about to be sent. The packet is passed to Dhcp6Callback and can be modified or replaced in Dhcp6Callback.
Dhcp6RcvdAdvertise	An Advertise packet is received and will be passed to Dhcp6Callback.
Dhcp6SelectAdvertise	It is time for Dhcp6Callback to determine whether select the default Advertise packet by RFC 3315 policy, or overwrite it by specific user policy.
Dhcp6SendRequest	A Request packet is about to be sent. The packet is passed to Dhcp6Callback and can be modified or replaced in Dhcp6Callback.
Dhcp6RcvdReply	A Reply packet is received and will be passed to Dhcp6Callback.
Dhcp6RcvdReconfigure	A Reconfigure packet is received and will be passed to Dhcp6Callback.
Dhcp6SendDecline	A Decline packet is about to be sent. The packet is passed to Dhcp6Callback and can be modified or replaced in Dhcp6Callback.
Dhcp6SendConfirm	A Confirm packet is about to be sent. The packet is passed to Dhcp6Callback and can be modified or replaced in Dhcp6Callback.
Dhcp6SendRelease	A Release packet is about to be sent. The packet is passed to Dhcp6Callback and can be modified or replaced in Dhcp6Callback.
Dhcp6EnterRenewing	A Renew packet is about to be sent. The packet is passed to Dhcp6Callback and can be modified or replaced in Dhcp6Callback.
Dhcp6EnterRebinding	A Rebind packet is about to be sent. The packet is passed to Dhcp6Callback and can be modified or replaced in Dhcp6Callback.

enum EFI_DHCP6_STATE

Enumerator
Dhcp6Init	The EFI DHCPv6 Protocol instance is configured, and start() needs to be called
Dhcp6Selecting	A Solicit packet is sent out to discover DHCPv6 server, and the EFI DHCPv6 Protocol instance is collecting Advertise packets.
Dhcp6Requesting	A Request is sent out to the DHCPv6 server, and the EFI DHCPv6 Protocol instance is waiting for Reply packet.
Dhcp6Declining	A Decline packet is sent out to indicate one or more addresses of the configured IA are in use by another node, and the EFI DHCPv6. Protocol instance is waiting for Reply packet.
Dhcp6Confirming	A Confirm packet is sent out to confirm the IPv6 addresses of the configured IA, and the EFI DHCPv6 Protocol instance is waiting for Reply packet.
Dhcp6Releasing	A Release packet is sent out to release one or more IPv6 addresses of the configured IA, and the EFI DHCPv6 Protocol instance is waiting for Reply packet.
Dhcp6Bound	The DHCPv6 S.A.R.R process is completed for the configured IA.
Dhcp6Renewing	A Renew packet is sent out to extend lifetime for the IPv6 addresses of the configured IA, and the EFI DHCPv6 Protocol instance is waiting for Reply packet.
Dhcp6Rebinding	A Rebind packet is sent out to extend lifetime for the IPv6 addresses of the configured IA, and the EFI DHCPv6 Protocol instance is waiting for Reply packet.

Variable Documentation

EFI_GUID gEfiDhcp6ProtocolGuid

EFI_GUID gEfiDhcp6ServiceBindingProtocolGuid