audk/MdeModulePkg/Universal/Network/Ip4ConfigDxe/Ip4Config.c

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/** @file
Copyright (c) 2006 - 2008, Intel Corporation
All rights reserved. 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.
Module Name:
Ip4Config.c
Abstract:
This code implements the IP4Config and NicIp4Config protocols.
**/
#include "Ip4Config.h"
IP4_CONFIG_INSTANCE *mIp4ConfigNicList[MAX_IP4_CONFIG_IN_VARIABLE];
/**
Callback function when DHCP process finished. It will save the
retrieved IP configure parameter from DHCP to the NVRam.
@param Event The callback event
@param Context Opaque context to the callback
@return None
**/
VOID
EFIAPI
Ip4ConfigOnDhcp4Complete (
IN EFI_EVENT Event,
IN VOID *Context
);
/**
Return the name and MAC address for the NIC. The Name, if not NULL,
has at least IP4_NIC_NAME_LENGTH bytes.
@param This The NIC IP4 CONFIG protocol
@param Name The buffer to return the name
@param NicAddr The buffer to return the MAC addr
@retval EFI_INVALID_PARAMETER This is NULL
@retval EFI_SUCCESS The name or address of the NIC are returned.
**/
EFI_STATUS
EFIAPI
EfiNicIp4ConfigGetName (
IN EFI_NIC_IP4_CONFIG_PROTOCOL *This,
IN UINT16 *Name, OPTIONAL
IN NIC_ADDR *NicAddr OPTIONAL
)
{
IP4_CONFIG_INSTANCE *Instance;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = IP4_CONFIG_INSTANCE_FROM_NIC_IP4CONFIG (This);
if (Name != NULL) {
CopyMem (Name, Instance->NicName, IP4_NIC_NAME_LENGTH);
}
if (NicAddr != NULL) {
CopyMem (NicAddr, &Instance->NicAddr, sizeof (*NicAddr));
}
return EFI_SUCCESS;
}
/**
Get the NIC's configure information from the IP4 configure variable.
It will remove the invalid variable.
@param NicAddr The NIC to check
@return NULL if no configure for the NIC in the variable, or it is invalid.
@return Otherwise the NIC's IP configure parameter.
**/
NIC_IP4_CONFIG_INFO *
Ip4ConfigGetNicInfo (
IN NIC_ADDR *NicAddr
)
{
IP4_CONFIG_VARIABLE *Variable;
IP4_CONFIG_VARIABLE *NewVariable;
NIC_IP4_CONFIG_INFO *Config;
//
// Read the configuration parameter for this NicAddr from
// the EFI variable
//
Variable = Ip4ConfigReadVariable ();
if (Variable == NULL) {
return NULL;
}
Config = Ip4ConfigFindNicVariable (Variable, NicAddr);
if (Config == NULL) {
gBS->FreePool (Variable);
return NULL;
}
//
// Validate the configuration, if the configuration is invalid,
// remove it from the variable.
//
if (!Ip4ConfigIsValid (Config)) {
NewVariable = Ip4ConfigModifyVariable (Variable, &Config->NicAddr, NULL);
Ip4ConfigWriteVariable (NewVariable);
if (NewVariable != NULL) {
gBS->FreePool (NewVariable);
};
gBS->FreePool (Config);
Config = NULL;
}
gBS->FreePool (Variable);
return Config;
}
/**
Get the configure parameter for this NIC.
@param This The NIC IP4 CONFIG protocol
@param ConfigLen The length of the NicConfig buffer.
@param NicConfig The buffer to receive the NIC's configure
parameter.
@retval EFI_INVALID_PARAMETER This or ConfigLen is NULL
@retval EFI_NOT_FOUND There is no configure parameter for the NIC in
NVRam.
**/
EFI_STATUS
EFIAPI
EfiNicIp4ConfigGetInfo (
IN EFI_NIC_IP4_CONFIG_PROTOCOL *This,
IN OUT UINTN *ConfigLen,
OUT NIC_IP4_CONFIG_INFO *NicConfig
)
{
IP4_CONFIG_INSTANCE *Instance;
NIC_IP4_CONFIG_INFO *Config;
EFI_STATUS Status;
UINTN Len;
if ((This == NULL) || (ConfigLen == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Read the Nic's configuration parameter from variable
//
Instance = IP4_CONFIG_INSTANCE_FROM_NIC_IP4CONFIG (This);
Config = Ip4ConfigGetNicInfo (&Instance->NicAddr);
if (Config == NULL) {
return EFI_NOT_FOUND;
}
//
// Copy the data to user's buffer
//
Len = SIZEOF_NIC_IP4_CONFIG_INFO (Config);
if ((*ConfigLen < Len) || (NicConfig == NULL)) {
Status = EFI_BUFFER_TOO_SMALL;
} else {
Status = EFI_SUCCESS;
CopyMem (NicConfig, Config, Len);
Ip4ConfigFixRouteTablePointer (&NicConfig->Ip4Info);
}
*ConfigLen = Len;
gBS->FreePool (Config);
return Status;
}
/**
Set the IP configure parameters for this NIC. If Reconfig is TRUE,
the IP driver will be informed to discard current auto configure
parameter and restart the auto configuration process. If current
there is a pending auto configuration, EFI_ALREADY_STARTED is
returned. You can only change the configure setting when either
the configure has finished or not started yet. If NicConfig, the
NIC's configure parameter is removed from the variable.
@param This The NIC IP4 CONFIG protocol
@param NicConfig The new NIC IP4 configure parameter
@param Reconfig Inform the IP4 driver to restart the auto
configuration
@retval EFI_INVALID_PARAMETER This is NULL or the configure parameter is
invalid.
@retval EFI_ALREADY_STARTED There is a pending auto configuration.
@retval EFI_NOT_FOUND No auto configure parameter is found
**/
EFI_STATUS
EFIAPI
EfiNicIp4ConfigSetInfo (
IN EFI_NIC_IP4_CONFIG_PROTOCOL *This,
IN NIC_IP4_CONFIG_INFO *NicConfig, OPTIONAL
IN BOOLEAN Reconfig
)
{
IP4_CONFIG_INSTANCE *Instance;
IP4_CONFIG_VARIABLE *Variable;
IP4_CONFIG_VARIABLE *NewVariable;
EFI_STATUS Status;
//
// Validate the parameters
//
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = IP4_CONFIG_INSTANCE_FROM_NIC_IP4CONFIG (This);
if ((NicConfig != NULL) && (!Ip4ConfigIsValid (NicConfig) ||
!NIC_ADDR_EQUAL (&NicConfig->NicAddr, &Instance->NicAddr))) {
return EFI_INVALID_PARAMETER;
}
if (Instance->State == IP4_CONFIG_STATE_STARTED) {
return EFI_ALREADY_STARTED;
}
//
// Update the parameter in the configure variable
//
Variable = Ip4ConfigReadVariable ();
if ((Variable == NULL) && (NicConfig == NULL)) {
return EFI_NOT_FOUND;
}
NewVariable = Ip4ConfigModifyVariable (Variable, &Instance->NicAddr, NicConfig);
Status = Ip4ConfigWriteVariable (NewVariable);
if (NewVariable != NULL) {
gBS->FreePool (NewVariable);
}
//
// Variable is NULL when saving the first configure parameter
//
if (Variable != NULL) {
gBS->FreePool (Variable);
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// Signal the IP4 to run the auto configuration again
//
if (Reconfig && (Instance->ReconfigEvent != NULL)) {
Status = gBS->SignalEvent (Instance->ReconfigEvent);
NetLibDispatchDpc ();
}
return Status;
}
/**
Start the auto configuration process.
@param This The IP4 configure protocol
@param DoneEvent The event to signal when auto configure is done
@param ReconfigEvent The event to signal when reconfigure is necessary.
@retval EFI_INVALID_PARAMETER One of the function parameters is NULL.
@retval EFI_ALREADY_STARTED The auto configuration has already started.
@retval EFI_SUCCESS The auto configure is successfully started.
**/
EFI_STATUS
EFIAPI
EfiIp4ConfigStart (
IN EFI_IP4_CONFIG_PROTOCOL *This,
IN EFI_EVENT DoneEvent,
IN EFI_EVENT ReconfigEvent
)
{
IP4_CONFIG_INSTANCE *Instance;
EFI_DHCP4_PROTOCOL *Dhcp4;
EFI_DHCP4_MODE_DATA Dhcp4Mode;
EFI_DHCP4_PACKET_OPTION *OptionList[1];
IP4_CONFIG_DHCP4_OPTION ParaList;
EFI_STATUS Status;
UINT32 Source;
EFI_TPL OldTpl;
if ((This == NULL) || (DoneEvent == NULL) || (ReconfigEvent == NULL)) {
return EFI_INVALID_PARAMETER;
}
Instance = IP4_CONFIG_INSTANCE_FROM_IP4CONFIG (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (Instance->State != IP4_CONFIG_STATE_IDLE) {
Status = EFI_ALREADY_STARTED;
goto ON_EXIT;
}
Instance->DoneEvent = DoneEvent;
Instance->ReconfigEvent = ReconfigEvent;
Instance->NicConfig = Ip4ConfigGetNicInfo (&Instance->NicAddr);
if (Instance->NicConfig == NULL) {
Source = IP4_CONFIG_SOURCE_DHCP;
} else {
Source = Instance->NicConfig->Source;
}
//
// If the source is static, the auto configuration is done.
// return now.
//
if (Source == IP4_CONFIG_SOURCE_STATIC) {
Instance->State = IP4_CONFIG_STATE_CONFIGURED;
Instance->Result = EFI_SUCCESS;
gBS->SignalEvent (Instance->DoneEvent);
Status = EFI_SUCCESS;
goto ON_EXIT;
}
//
// Start the dhcp process
//
ASSERT ((Source == IP4_CONFIG_SOURCE_DHCP) && (Instance->Dhcp4 == NULL));
Status = NetLibCreateServiceChild (
Instance->Controller,
Instance->Image,
&gEfiDhcp4ServiceBindingProtocolGuid,
&Instance->Dhcp4Handle
);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
Status = gBS->OpenProtocol (
Instance->Dhcp4Handle,
&gEfiDhcp4ProtocolGuid,
(VOID **) &Instance->Dhcp4,
Instance->Image,
Instance->Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
//
// Check the current DHCP status, if the DHCP process has
// already finished, return now.
//
Dhcp4 = Instance->Dhcp4;
Status = Dhcp4->GetModeData (Dhcp4, &Dhcp4Mode);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
if (Dhcp4Mode.State == Dhcp4Bound) {
Ip4ConfigOnDhcp4Complete (NULL, Instance);
goto ON_EXIT;
}
//
// Try to start the DHCP process. Use most of the current
// DHCP configuration to avoid problems if some DHCP client
// yields the control of this DHCP service to us.
//
ParaList.Head.OpCode = DHCP_TAG_PARA_LIST;
ParaList.Head.Length = 2;
ParaList.Head.Data[0] = DHCP_TAG_NETMASK;
ParaList.Route = DHCP_TAG_ROUTER;
OptionList[0] = &ParaList.Head;
Dhcp4Mode.ConfigData.OptionCount = 1;
Dhcp4Mode.ConfigData.OptionList = OptionList;
Status = Dhcp4->Configure (Dhcp4, &Dhcp4Mode.ConfigData);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
//
// Start the DHCP process
//
Status = gBS->CreateEvent (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
Ip4ConfigOnDhcp4Complete,
Instance,
&Instance->Dhcp4Event
);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
Status = Dhcp4->Start (Dhcp4, Instance->Dhcp4Event);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
Instance->State = IP4_CONFIG_STATE_STARTED;
Instance->Result = EFI_NOT_READY;
ON_ERROR:
if (EFI_ERROR (Status)) {
Ip4ConfigCleanConfig (Instance);
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
NetLibDispatchDpc ();
return Status;
}
/**
Stop the current auto configuration
@param This The IP4 CONFIG protocol
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_NOT_STARTED The auto configuration hasn't been started.
@retval EFI_SUCCESS The auto configuration has been stopped.
**/
EFI_STATUS
EFIAPI
EfiIp4ConfigStop (
IN EFI_IP4_CONFIG_PROTOCOL *This
)
{
IP4_CONFIG_INSTANCE *Instance;
EFI_STATUS Status;
EFI_TPL OldTpl;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = IP4_CONFIG_INSTANCE_FROM_IP4CONFIG (This);
Status = EFI_SUCCESS;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (Instance->State == IP4_CONFIG_STATE_IDLE) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
//
// Release all the configure parameters. Don't signal the user
// event. The user wants to abort the configuration, this isn't
// the configuration done or reconfiguration.
//
Ip4ConfigCleanConfig (Instance);
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Get the current outcome of the auto configuration process
@param This The IP4 CONFIG protocol
@param ConfigDataSize The size of the configure data
@param ConfigData The buffer to save the configure data
@retval EFI_INVALID_PARAMETER This or ConfigDataSize is NULL
@retval EFI_BUFFER_TOO_SMALL The buffer is too small. The needed size is
returned in the ConfigDataSize.
@retval EFI_SUCCESS The configure data is put in the buffer
**/
EFI_STATUS
EFIAPI
EfiIp4ConfigGetData (
IN EFI_IP4_CONFIG_PROTOCOL *This,
IN OUT UINTN *ConfigDataSize,
OUT EFI_IP4_IPCONFIG_DATA *ConfigData OPTIONAL
)
{
IP4_CONFIG_INSTANCE *Instance;
NIC_IP4_CONFIG_INFO *NicConfig;
EFI_STATUS Status;
EFI_TPL OldTpl;
UINTN Len;
if ((This == NULL) || (ConfigDataSize == NULL)) {
return EFI_INVALID_PARAMETER;
}
Instance = IP4_CONFIG_INSTANCE_FROM_IP4CONFIG (This);
Status = EFI_SUCCESS;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (Instance->State == IP4_CONFIG_STATE_IDLE) {
Status = EFI_NOT_STARTED;
} else if (Instance->State == IP4_CONFIG_STATE_STARTED) {
Status = EFI_NOT_READY;
}
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
//
// Copy the configure data if auto configuration succeeds.
//
Status = Instance->Result;
if (Status == EFI_SUCCESS) {
ASSERT (Instance->NicConfig != NULL);
NicConfig = Instance->NicConfig;
Len = SIZEOF_IP4_CONFIG_INFO (&NicConfig->Ip4Info);
if ((*ConfigDataSize < Len) || (ConfigData == NULL)) {
Status = EFI_BUFFER_TOO_SMALL;
} else {
CopyMem (ConfigData, &NicConfig->Ip4Info, Len);
Ip4ConfigFixRouteTablePointer (ConfigData);
}
*ConfigDataSize = Len;
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Callback function when DHCP process finished. It will save the
retrieved IP configure parameter from DHCP to the NVRam.
@param Event The callback event
@param Context Opaque context to the callback
@return None
**/
VOID
EFIAPI
Ip4ConfigOnDhcp4Complete (
IN EFI_EVENT Event,
IN VOID *Context
)
{
IP4_CONFIG_INSTANCE *Instance;
EFI_DHCP4_MODE_DATA Dhcp4Mode;
EFI_IP4_IPCONFIG_DATA *Ip4Config;
EFI_STATUS Status;
BOOLEAN Perment;
IP4_ADDR Subnet;
IP4_ADDR Ip1;
IP4_ADDR Ip2;
Instance = (IP4_CONFIG_INSTANCE *) Context;
ASSERT (Instance->Dhcp4 != NULL);
Instance->State = IP4_CONFIG_STATE_CONFIGURED;
Instance->Result = EFI_TIMEOUT;
//
// Get the DHCP retrieved parameters
//
Status = Instance->Dhcp4->GetModeData (Instance->Dhcp4, &Dhcp4Mode);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
if (Dhcp4Mode.State == Dhcp4Bound) {
//
// Save the new configuration retrieved by DHCP both in
// the instance and to NVRam. So, both the IP4 driver and
// other user can get that address.
//
Perment = FALSE;
if (Instance->NicConfig != NULL) {
ASSERT (Instance->NicConfig->Source == IP4_CONFIG_SOURCE_DHCP);
Perment = Instance->NicConfig->Perment;
gBS->FreePool (Instance->NicConfig);
}
Instance->NicConfig = AllocatePool (sizeof (NIC_IP4_CONFIG_INFO) + 2* sizeof (EFI_IP4_ROUTE_TABLE));
if (Instance->NicConfig == NULL) {
Instance->Result = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
Instance->NicConfig->Ip4Info.RouteTable = (EFI_IP4_ROUTE_TABLE *) (Instance->NicConfig + 1);
CopyMem (&Instance->NicConfig->NicAddr, &Instance->NicAddr, sizeof (Instance->NicConfig->NicAddr));
Instance->NicConfig->Source = IP4_CONFIG_SOURCE_DHCP;
Instance->NicConfig->Perment = Perment;
Ip4Config = &Instance->NicConfig->Ip4Info;
Ip4Config->StationAddress = Dhcp4Mode.ClientAddress;
Ip4Config->SubnetMask = Dhcp4Mode.SubnetMask;
//
// Create a route for the connected network
//
Ip4Config->RouteTableSize = 1;
CopyMem (&Ip1, &Dhcp4Mode.ClientAddress, sizeof (IP4_ADDR));
CopyMem (&Ip2, &Dhcp4Mode.SubnetMask, sizeof (IP4_ADDR));
Subnet = Ip1 & Ip2;
CopyMem (&Ip4Config->RouteTable[0].SubnetAddress, &Subnet, sizeof (EFI_IPv4_ADDRESS));
CopyMem (&Ip4Config->RouteTable[0].SubnetMask, &Dhcp4Mode.SubnetMask, sizeof (EFI_IPv4_ADDRESS));
ZeroMem (&Ip4Config->RouteTable[0].GatewayAddress, sizeof (EFI_IPv4_ADDRESS));
//
// Create a route if there is a default router.
//
if (!EFI_IP4_EQUAL (&Dhcp4Mode.RouterAddress, &mZeroIp4Addr)) {
Ip4Config->RouteTableSize = 2;
ZeroMem (&Ip4Config->RouteTable[1].SubnetAddress, sizeof (EFI_IPv4_ADDRESS));
ZeroMem (&Ip4Config->RouteTable[1].SubnetMask, sizeof (EFI_IPv4_ADDRESS));
CopyMem (&Ip4Config->RouteTable[1].GatewayAddress, &Dhcp4Mode.RouterAddress, sizeof (EFI_IPv4_ADDRESS));
}
Instance->Result = EFI_SUCCESS;
//
// ignore the return status of EfiNicIp4ConfigSetInfo. Network
// stack can operate even that failed.
//
EfiNicIp4ConfigSetInfo (&Instance->NicIp4Protocol, Instance->NicConfig, FALSE);
}
ON_EXIT:
gBS->SignalEvent (Instance->DoneEvent);
Ip4ConfigCleanDhcp4 (Instance);
NetLibDispatchDpc ();
return ;
}
/**
Release all the DHCP related resources.
@param This The IP4 configure instance
@return None
**/
VOID
Ip4ConfigCleanDhcp4 (
IN IP4_CONFIG_INSTANCE *This
)
{
if (This->Dhcp4 != NULL) {
This->Dhcp4->Stop (This->Dhcp4);
gBS->CloseProtocol (
This->Dhcp4Handle,
&gEfiDhcp4ProtocolGuid,
This->Image,
This->Controller
);
This->Dhcp4 = NULL;
}
if (This->Dhcp4Handle != NULL) {
NetLibDestroyServiceChild (
This->Controller,
This->Image,
&gEfiDhcp4ServiceBindingProtocolGuid,
This->Dhcp4Handle
);
This->Dhcp4Handle = NULL;
}
if (This->Dhcp4Event == NULL) {
gBS->CloseEvent (This->Dhcp4Event);
This->Dhcp4Event = NULL;
}
}
/**
Clean up all the configuration parameters.
@param Instance The IP4 configure instance
@return None
**/
VOID
Ip4ConfigCleanConfig (
IN IP4_CONFIG_INSTANCE *Instance
)
{
if (Instance->NicConfig != NULL) {
gBS->FreePool (Instance->NicConfig);
Instance->NicConfig = NULL;
}
Instance->State = IP4_CONFIG_STATE_IDLE;
Instance->DoneEvent = NULL;
Instance->ReconfigEvent = NULL;
Ip4ConfigCleanDhcp4 (Instance);
}
EFI_IP4_CONFIG_PROTOCOL mIp4ConfigProtocolTemplate = {
EfiIp4ConfigStart,
EfiIp4ConfigStop,
EfiIp4ConfigGetData
};
EFI_NIC_IP4_CONFIG_PROTOCOL mNicIp4ConfigProtocolTemplate = {
EfiNicIp4ConfigGetName,
EfiNicIp4ConfigGetInfo,
EfiNicIp4ConfigSetInfo
};