mirror of https://github.com/acidanthera/audk.git
updated interface comments per UEFI Spec.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6547 6f19259b-4bc3-4df7-8a09-765794883524
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jgong5
parent
08a458be1d
commit
faac3f0cfe
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@ -103,7 +103,14 @@ typedef enum{
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} EFI_DHCP4_EVENT;
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/**
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Callback routine
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Callback routine.
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EFI_DHCP4_CALLBACK is provided by the consumer of the EFI DHCPv4 Protocol driver
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to intercept events that occurred in the configuration process. This structure
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provides advanced control of each state transition of the DHCP process. The
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returned status code determines the behavior of the EFI DHCPv4 Protocol driver.
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There are three possible returned values, which are described in the following
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table.
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@param This Pointer to the EFI DHCPv4 Protocol instance that is used to
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configure this callback function.
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@ -186,6 +193,9 @@ typedef struct {
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/**
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Returns the current operating mode and cached data packet for the EFI DHCPv4 Protocol driver.
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The GetModeData() function returns the current operating mode and cached data
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packet for the EFI DHCPv4 Protocol driver.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@param Dhcp4ModeData Pointer to storage for the EFI_DHCP4_MODE_DATA structure.
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@ -204,6 +214,29 @@ EFI_STATUS
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/**
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Initializes, changes, or resets the operational settings for the EFI DHCPv4 Protocol driver.
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The Configure() function is used to initialize, change, or reset the operational
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settings of the EFI DHCPv4 Protocol driver for the communication device on which
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the EFI DHCPv4 Service Binding Protocol is installed. This function can be
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successfully called only if both of the following are true:
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* This instance of the EFI DHCPv4 Protocol driver is in the Dhcp4Stopped, Dhcp4Init,
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Dhcp4InitReboot, or Dhcp4Bound states.
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* No other EFI DHCPv4 Protocol driver instance that is controlled by this EFI
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DHCPv4 Service Binding Protocol driver instance has configured this EFI DHCPv4
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Protocol driver.
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When this driver is in the Dhcp4Stopped state, it can transfer into one of the
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following two possible initial states:
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* Dhcp4Init
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* Dhcp4InitReboot
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The driver can transfer into these states by calling Configure() with a non-NULL
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Dhcp4CfgData. The driver will transfer into the appropriate state based on the
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supplied client network address in the ClientAddress parameter and DHCP options
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in the OptionList parameter as described in RFC 2131.
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When Configure() is called successfully while Dhcp4CfgData is set to NULL, the
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default configuring data will be reset in the EFI DHCPv4 Protocol driver and
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the state of the EFI DHCPv4 Protocol driver will not be changed. If one instance
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wants to make it possible for another instance to configure the EFI DHCPv4 Protocol
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driver, it must call this function with Dhcp4CfgData set to NULL.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@param Dhcp4CfgData Pointer to the EFI_DHCP4_CONFIG_DATA.
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@ -231,6 +264,20 @@ EFI_STATUS
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/**
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Starts the DHCP configuration process.
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The Start() function starts the DHCP configuration process. This function can
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be called only when the EFI DHCPv4 Protocol driver is in the Dhcp4Init or
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Dhcp4InitReboot state.
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If the DHCP process completes successfully, the state of the EFI DHCPv4 Protocol
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driver will be transferred through Dhcp4Selecting and Dhcp4Requesting to the
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Dhcp4Bound state. The CompletionEvent will then be signaled if it is not NULL.
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If the process aborts, either by the user or by some unexpected network error,
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the state is restored to the Dhcp4Init state. The Start() function can be called
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again to restart the process.
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Refer to RFC 2131 for precise state transitions during this process. At the
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time when each event occurs in this process, the callback function that was set
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by EFI_DHCP4_PROTOCOL.Configure() will be called and the user can take this
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opportunity to control the process.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@param CompletionEvent If not NULL, indicates the event that will be signaled when the
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EFI DHCPv4 Protocol driver is transferred into the
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@ -263,6 +310,18 @@ EFI_STATUS
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/**
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Extends the lease time by sending a request packet.
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The RenewRebind() function is used to manually extend the lease time when the
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EFI DHCPv4 Protocol driver is in the Dhcp4Bound state and the lease time has
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not expired yet. This function will send a request packet to the previously
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found server (or to any server when RebindRequest is TRUE) and transfer the
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state into the Dhcp4Renewing state (or Dhcp4Rebinding when RebindingRequest is
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TRUE). When a response is received, the state is returned to Dhcp4Bound.
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If no response is received before the try count is exceeded (the RequestTryCount
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field that is specified in EFI_DHCP4_CONFIG_DATA) but before the lease time that
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was issued by the previous server expires, the driver will return to the Dhcp4Bound
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state and the previous configuration is restored. The outgoing and incoming packets
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can be captured by the EFI_DHCP4_CALLBACK function.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@param RebindRequest If TRUE, this function broadcasts the request packets and enters
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@ -298,6 +357,16 @@ EFI_STATUS
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/**
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Releases the current address configuration.
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The Release() function releases the current configured IP address by doing either
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of the following:
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* Sending a DHCPRELEASE packet when the EFI DHCPv4 Protocol driver is in the
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Dhcp4Bound state
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* Setting the previously assigned IP address that was provided with the
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EFI_DHCP4_PROTOCOL.Configure() function to 0.0.0.0 when the driver is in
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Dhcp4InitReboot state
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After a successful call to this function, the EFI DHCPv4 Protocol driver returns
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to the Dhcp4Init state and any subsequent incoming packets will be discarded silently.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@retval EFI_SUCCESS The EFI DHCPv4 Protocol driver is now in the Dhcp4Init phase.
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@ -314,6 +383,12 @@ EFI_STATUS
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/**
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Stops the current address configuration.
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The Stop() function is used to stop the DHCP configuration process. After this
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function is called successfully, the EFI DHCPv4 Protocol driver is transferred
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into the Dhcp4Stopped state. EFI_DHCP4_PROTOCOL.Configure() needs to be called
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before DHCP configuration process can be started again. This function can be
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called when the EFI DHCPv4 Protocol driver is in any state.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@ -330,6 +405,11 @@ EFI_STATUS
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/**
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Builds a DHCP packet, given the options to be appended or deleted or replaced.
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The Build() function is used to assemble a new packet from the original packet
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by replacing or deleting existing options or appending new options. This function
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does not change any state of the EFI DHCPv4 Protocol driver and can be used at
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any time.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@param SeedPacket Initial packet to be used as a base for building new packet.
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@param DeleteCount Number of opcodes in the DeleteList.
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@ -360,8 +440,14 @@ EFI_STATUS
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IN EFI_DHCP4_PACKET_OPTION *AppendList[] OPTIONAL,
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OUT EFI_DHCP4_PACKET **NewPacket
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);
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/**
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Transmits a DHCP formatted packet and optionally waits for responses.
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The TransmitReceive() function is used to transmit a DHCP packet and optionally
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wait for the response from servers. This function does not change the state of
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the EFI DHCPv4 Protocol driver and thus can be used at any time.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@param Token Pointer to the EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN structure.
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@ -385,6 +471,14 @@ EFI_STATUS
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/**
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Parses the packed DHCP option data.
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The Parse() function is used to retrieve the option list from a DHCP packet.
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If *OptionCount isn’t zero, and there is enough space for all the DHCP options
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in the Packet, each element of PacketOptionList is set to point to somewhere in
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the Packet->Dhcp4.Option where a new DHCP option begins. If RFC3396 is supported,
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the caller should reassemble the parsed DHCP options to get the finial result.
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If *OptionCount is zero or there isn’t enough space for all of them, the number
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of DHCP options in the Packet is returned in OptionCount.
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@param This Pointer to the EFI_DHCP4_PROTOCOL instance.
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@param Packet Pointer to packet to be parsed.
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