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audk/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c

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/** @file
Copyright (c) 2007 - 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:
ConfigRouting.c
Abstract:
Implementation for EFI_HII_CONFIG_ROUTING_PROTOCOL.
Revision History
**/
#include "HiiDatabase.h"
/**
Calculate the number of Unicode characters of the incoming Configuration string,
not including NULL terminator.
This is a internal function.
@param String String in <MultiConfigRequest> or
<MultiConfigResp> format.
@return The number of Unicode characters.
**/
UINTN
CalculateConfigStringLen (
IN EFI_STRING String
)
{
UINTN Length;
//
// "GUID=" should be the first element of incoming string.
//
ASSERT (String != NULL);
ASSERT (StrnCmp (String, L"GUID=", StrLen (L"GUID=")) == 0);
Length = StrLen (L"GUID=");
String += Length;
//
// The beginning of next <ConfigRequest>/<ConfigResp> should be "&GUID=".
// Will meet '\0' if there is only one <ConfigRequest>/<ConfigResp>.
//
while (*String != 0 && StrnCmp (String, L"&GUID=", StrLen (L"&GUID=")) != 0) {
Length++;
String++;
}
return Length;
}
/**
Convert the hex UNICODE %02x encoding of a UEFI device path to binary
from <PathHdr> of <ConfigHdr>.
This is a internal function.
@param String UEFI configuration string
@param DevicePath binary of a UEFI device path.
@retval EFI_INVALID_PARAMETER Any incoming parameter is invalid.
@retval EFI_OUT_OF_RESOURCES Lake of resources to store neccesary structures.
@retval EFI_SUCCESS The device path is retrieved and translated to
binary format.
**/
EFI_STATUS
GetDevicePath (
IN EFI_STRING String,
OUT UINT8 **DevicePath
)
{
UINTN Length;
EFI_STRING PathHdr;
EFI_STRING DevicePathString;
if (String == NULL || DevicePath == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Find the 'PATH=' of <PathHdr> and skip it.
//
for (; (*String != 0 && StrnCmp (String, L"PATH=", StrLen (L"PATH=")) != 0); String++);
if (*String == 0) {
return EFI_INVALID_PARAMETER;
}
String += StrLen (L"PATH=");
PathHdr = String;
//
// The content between 'PATH=' of <ConfigHdr> and '&' of next element
// or '\0' (end of configuration string) is the UNICODE %02x bytes encoding
// of UEFI device path.
//
for (Length = 0; *String != 0 && *String != L'&'; String++, Length++);
DevicePathString = (EFI_STRING) AllocateZeroPool ((Length + 1) * sizeof (CHAR16));
if (DevicePathString == NULL) {
return EFI_OUT_OF_RESOURCES;
}
StrnCpy (DevicePathString, PathHdr, Length);
*(DevicePathString + Length) = 0;
//
// The data in <PathHdr> is encoded as hex UNICODE %02x bytes in the same order
// as the device path resides in RAM memory.
// Translate the data into binary.
//
Length /= 2;
*DevicePath = (UINT8 *) AllocateZeroPool (Length);
if (*DevicePath == NULL) {
SafeFreePool (DevicePathString);
return EFI_OUT_OF_RESOURCES;
}
HexStringToBuffer (*DevicePath, &Length, DevicePathString);
SafeFreePool (DevicePathString);
return EFI_SUCCESS;
}
/**
Extract Storage from all Form Packages in current hii database.
This is a internal function.
@param HiiDatabase EFI_HII_DATABASE_PROTOCOL instance.
@param StorageListHead Storage link List head.
@retval EFI_NOT_FOUND There is no form package in current hii database.
@retval EFI_INVALID_PARAMETER Any parameter is invalid.
@retval EFI_SUCCESS All existing storage is exported.
**/
EFI_STATUS
ExportAllStorage (
IN EFI_HII_DATABASE_PROTOCOL *HiiDatabase,
IN OUT LIST_ENTRY *StorageListHead
)
{
EFI_STATUS Status;
UINTN BufferSize;
UINTN HandleCount;
EFI_HII_HANDLE *HandleBuffer;
UINTN Index;
UINTN Index2;
EFI_HII_PACKAGE_LIST_HEADER *HiiPackageList;
EFI_HII_PACKAGE_HEADER *Package;
UINT8 *OpCodeData;
UINT8 Operand;
UINT32 Offset;
HII_FORMSET_STORAGE *Storage;
EFI_HII_HANDLE HiiHandle;
EFI_HANDLE DriverHandle;
CHAR8 *AsciiString;
UINT32 PackageListLength;
EFI_HII_PACKAGE_HEADER PackageHeader;
//
// Find the package list which contains Form package.
//
BufferSize = 0;
HandleBuffer = NULL;
Status = HiiListPackageLists (
HiiDatabase,
EFI_HII_PACKAGE_FORM,
NULL,
&BufferSize,
HandleBuffer
);
if (Status == EFI_BUFFER_TOO_SMALL) {
HandleBuffer = AllocateZeroPool (BufferSize);
ASSERT (HandleBuffer != NULL);
Status = HiiListPackageLists (
HiiDatabase,
EFI_HII_PACKAGE_FORM,
NULL,
&BufferSize,
HandleBuffer
);
}
if (EFI_ERROR (Status)) {
SafeFreePool (HandleBuffer);
return Status;
}
HandleCount = BufferSize / sizeof (EFI_HII_HANDLE);
for (Index = 0; Index < HandleCount; Index++) {
HiiHandle = HandleBuffer[Index];
BufferSize = 0;
HiiPackageList = NULL;
Status = HiiExportPackageLists (HiiDatabase, HiiHandle, &BufferSize, HiiPackageList);
if (Status == EFI_BUFFER_TOO_SMALL) {
HiiPackageList = AllocateZeroPool (BufferSize);
ASSERT (HiiPackageList != NULL);
Status = HiiExportPackageLists (HiiDatabase, HiiHandle, &BufferSize, HiiPackageList);
}
if (EFI_ERROR (Status)) {
SafeFreePool (HandleBuffer);
SafeFreePool (HiiPackageList);
return Status;
}
//
// Get Form package from this HII package List
//
Offset = sizeof (EFI_HII_PACKAGE_LIST_HEADER);
CopyMem (&PackageListLength, &HiiPackageList->PackageLength, sizeof (UINT32));
Package = NULL;
ZeroMem (&PackageHeader, sizeof (EFI_HII_PACKAGE_HEADER));
while (Offset < PackageListLength) {
Package = (EFI_HII_PACKAGE_HEADER *) (((UINT8 *) HiiPackageList) + Offset);
CopyMem (&PackageHeader, Package, sizeof (EFI_HII_PACKAGE_HEADER));
if (PackageHeader.Type == EFI_HII_PACKAGE_FORM) {
break;
}
Offset += PackageHeader.Length;
}
if (Offset >= PackageListLength) {
//
// Error here: No Form package found in this Package List
//
ASSERT (FALSE);
}
//
// Search Storage definition in this Form package
//
Offset = sizeof (EFI_HII_PACKAGE_HEADER);
while (Offset < PackageHeader.Length) {
OpCodeData = ((UINT8 *) Package) + Offset;
Offset += ((EFI_IFR_OP_HEADER *) OpCodeData)->Length;
Operand = ((EFI_IFR_OP_HEADER *) OpCodeData)->OpCode;
if ((Operand == EFI_IFR_VARSTORE_OP) ||
(Operand == EFI_IFR_VARSTORE_NAME_VALUE_OP) ||
(Operand == EFI_IFR_VARSTORE_EFI_OP)) {
Storage = AllocateZeroPool (sizeof (HII_FORMSET_STORAGE));
ASSERT (Storage != NULL);
InsertTailList (StorageListHead, &Storage->Entry);
Storage->Signature = HII_FORMSET_STORAGE_SIGNATURE;
Storage->HiiHandle = HiiHandle;
Status = HiiGetPackageListHandle (HiiDatabase, HiiHandle, &DriverHandle);
if (EFI_ERROR (Status)) {
SafeFreePool (HandleBuffer);
SafeFreePool (HiiPackageList);
SafeFreePool (Storage);
return Status;
}
Storage->DriverHandle = DriverHandle;
if (Operand == EFI_IFR_VARSTORE_OP) {
Storage->Type = EFI_HII_VARSTORE_BUFFER;
CopyMem (&Storage->Guid, &((EFI_IFR_VARSTORE *) OpCodeData)->Guid, sizeof (EFI_GUID));
CopyMem (&Storage->Size, &((EFI_IFR_VARSTORE *) OpCodeData)->Size, sizeof (UINT16));
AsciiString = (CHAR8 *) ((EFI_IFR_VARSTORE *) OpCodeData)->Name;
Storage->Name = AllocateZeroPool (AsciiStrSize (AsciiString) * 2);
ASSERT (Storage->Name != NULL);
for (Index2 = 0; AsciiString[Index2] != 0; Index2++) {
Storage->Name[Index2] = (CHAR16) AsciiString[Index2];
}
//
// Append '\0' to the end of the unicode string.
//
Storage->Name[Index2] = 0;
} else if (Operand == EFI_IFR_VARSTORE_NAME_VALUE_OP) {
Storage->Type = EFI_HII_VARSTORE_NAME_VALUE;
CopyMem (&Storage->Guid, &((EFI_IFR_VARSTORE_NAME_VALUE *) OpCodeData)->Guid, sizeof (EFI_GUID));
} else if (Operand == EFI_IFR_VARSTORE_EFI_OP) {
Storage->Type = EFI_HII_VARSTORE_EFI_VARIABLE;
CopyMem (&Storage->Guid, &((EFI_IFR_VARSTORE_EFI *) OpCodeData)->Guid, sizeof (EFI_GUID));
}
}
}
SafeFreePool (HiiPackageList);
}
SafeFreePool (HandleBuffer);
return EFI_SUCCESS;
}
/**
Generate a sub string then output it.
This is a internal function.
@param String A constant string which is the prefix of the to be
generated string, e.g. GUID=
@param BufferLen The length of the Buffer in bytes.
@param Buffer Points to a buffer which will be converted to be the
content of the generated string.
@param Flag If 1, the buffer contains data for the value of GUID or PATH stored in
UINT8 *; if 2, the buffer contains unicode string for the value of NAME;
if 3, the buffer contains other data.
@param SubStr Points to the output string. It's caller's
responsibility to free this buffer.
**/
VOID
GenerateSubStr (
IN CONST EFI_STRING String,
IN UINTN BufferLen,
IN VOID *Buffer,
IN UINT8 Flag,
OUT EFI_STRING *SubStr
)
{
UINTN Length;
EFI_STRING Str;
EFI_STATUS Status;
EFI_STRING StringHeader;
ASSERT (String != NULL && SubStr != NULL);
if (Buffer == NULL) {
*SubStr = AllocateCopyPool (StrSize (String), String);
ASSERT (*SubStr != NULL);
return ;
}
Length = StrLen (String) + BufferLen * 2 + 1 + 1;
Str = AllocateZeroPool (Length * sizeof (CHAR16));
ASSERT (Str != NULL);
StrCpy (Str, String);
Length = (BufferLen * 2 + 1) * sizeof (CHAR16);
Status = EFI_SUCCESS;
StringHeader = Str + StrLen (String);
switch (Flag) {
case 1:
Status = BufferToHexString (StringHeader, (UINT8 *) Buffer, BufferLen);
break;
case 2:
Status = UnicodeToConfigString (StringHeader, &Length, (CHAR16 *) Buffer);
break;
case 3:
Status = BufToHexString (StringHeader, &Length, (UINT8 *) Buffer, BufferLen);
//
// Convert the uppercase to lowercase since <HexAf> is defined in lowercase format.
//
ToLower (StringHeader);
break;
default:
break;
}
ASSERT_EFI_ERROR (Status);
StrCat (Str, L"&");
*SubStr = Str;
}
/**
Retrieve the <ConfigBody> from String then output it.
This is a internal function.
@param String A sub string of a configuration string in
<MultiConfigAltResp> format.
@param ConfigBody Points to the output string. It's caller's
responsibility to free this buffer.
@retval EFI_INVALID_PARAMETER There is no form package in current hii database.
@retval EFI_OUT_OF_RESOURCES Not enough memory to finish this operation.
@retval EFI_SUCCESS All existing storage is exported.
**/
EFI_STATUS
OutputConfigBody (
IN EFI_STRING String,
OUT EFI_STRING *ConfigBody
)
{
EFI_STRING TmpPtr;
EFI_STRING Result;
UINTN Length;
if (String == NULL || ConfigBody == NULL) {
return EFI_INVALID_PARAMETER;
}
TmpPtr = StrStr (String, L"GUID=");
if (TmpPtr == NULL) {
//
// It is the last <ConfigResp> of the incoming configuration string.
//
Result = AllocateCopyPool (StrSize (String), String);
if (Result == NULL) {
return EFI_OUT_OF_RESOURCES;
} else {
*ConfigBody = Result;
return EFI_SUCCESS;
}
}
Length = TmpPtr - String;
Result = AllocateCopyPool (Length * sizeof (CHAR16), String);
if (Result == NULL) {
return EFI_OUT_OF_RESOURCES;
}
*(Result + Length - 1) = 0;
*ConfigBody = Result;
return EFI_SUCCESS;
}
/**
Adjusts the size of a previously allocated buffer.
@param OldPool A pointer to the buffer whose size is being adjusted.
@param OldSize The size of the current buffer.
@param NewSize The size of the new buffer.
@return The new buffer allocated.
**/
VOID *
ReallocatePool (
IN VOID *OldPool,
IN UINTN OldSize,
IN UINTN NewSize
)
{
VOID *NewPool;
NewPool = NULL;
if (NewSize != 0) {
NewPool = AllocateZeroPool (NewSize);
}
if (OldPool != NULL) {
if (NewPool != NULL) {
CopyMem (NewPool, OldPool, OldSize < NewSize ? OldSize : NewSize);
}
gBS->FreePool (OldPool);
}
return NewPool;
}
/**
Append a string to a multi-string format.
This is a internal function.
@param MultiString String in <MultiConfigRequest>,
<MultiConfigAltResp>, or <MultiConfigResp>. On
input, the buffer length of this string is
MAX_STRING_LENGTH. On output, the buffer length
might be updated.
@param AppendString NULL-terminated Unicode string.
@retval EFI_INVALID_PARAMETER Any incoming parameter is invalid.
@retval EFI_SUCCESS AppendString is append to the end of MultiString
**/
EFI_STATUS
AppendToMultiString (
IN OUT EFI_STRING *MultiString,
IN EFI_STRING AppendString
)
{
UINTN AppendStringSize;
UINTN MultiStringSize;
if (MultiString == NULL || *MultiString == NULL || AppendString == NULL) {
return EFI_INVALID_PARAMETER;
}
AppendStringSize = StrSize (AppendString);
MultiStringSize = StrSize (*MultiString);
//
// Enlarge the buffer each time when length exceeds MAX_STRING_LENGTH.
//
if (MultiStringSize + AppendStringSize > MAX_STRING_LENGTH ||
MultiStringSize > MAX_STRING_LENGTH) {
*MultiString = (EFI_STRING) ReallocatePool (
(VOID *) (*MultiString),
MultiStringSize,
MultiStringSize + AppendStringSize
);
}
//
// Append the incoming string
//
StrCat (*MultiString, AppendString);
return EFI_SUCCESS;
}
/**
Get the value of <Number> in <BlockConfig> format, i.e. the value of OFFSET
or WIDTH or VALUE.
<BlockConfig> ::= 'OFFSET='<Number>&'WIDTH='<Number>&'VALUE'=<Number>
This is a internal function.
@param StringPtr String in <BlockConfig> format and points to the
first character of <Number>.
@param Number The output value. Caller takes the responsibility
to free memory.
@param Len Length of the <Number>, in characters.
@retval EFI_OUT_OF_RESOURCES Insufficient resources to store neccessary
structures.
@retval EFI_SUCCESS Value of <Number> is outputted in Number
successfully.
**/
EFI_STATUS
GetValueOfNumber (
IN EFI_STRING StringPtr,
OUT UINT8 **Number,
OUT UINTN *Len
)
{
EFI_STRING TmpPtr;
UINTN Length;
EFI_STRING Str;
UINT8 *Buf;
EFI_STATUS Status;
ASSERT (StringPtr != NULL && Number != NULL && Len != NULL);
ASSERT (*StringPtr != 0);
Buf = NULL;
TmpPtr = StringPtr;
while (*StringPtr != 0 && *StringPtr != L'&') {
StringPtr++;
}
*Len = StringPtr - TmpPtr;
Length = *Len + 1;
Str = (EFI_STRING) AllocateZeroPool (Length * sizeof (EFI_STRING));
if (Str == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
CopyMem (Str, TmpPtr, *Len * sizeof (CHAR16));
*(Str + *Len) = 0;
Length = (Length + 1) / 2;
Buf = (UINT8 *) AllocateZeroPool (Length);
if (Buf == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
Status = HexStringToBuf (Buf, &Length, Str, NULL);
if (EFI_ERROR (Status)) {
goto Exit;
}
*Number = Buf;
Status = EFI_SUCCESS;
Exit:
SafeFreePool (Str);
return Status;
}
/**
This function allows a caller to extract the current configuration
for one or more named elements from one or more drivers.
@param This A pointer to the EFI_HII_CONFIG_ROUTING_PROTOCOL
instance.
@param Request A null-terminated Unicode string in
<MultiConfigRequest> format.
@param Progress On return, points to a character in the Request
string. Points to the string's null terminator if
request was successful. Points to the most recent
& before the first failing name / value pair (or
the beginning of the string if the failure is in
the first name / value pair) if the request was
not successful.
@param Results Null-terminated Unicode string in
<MultiConfigAltResp> format which has all values
filled in for the names in the Request string.
String to be allocated by the called function.
@retval EFI_SUCCESS The Results string is filled with the values
corresponding to all requested names.
@retval EFI_OUT_OF_RESOURCES Not enough memory to store the parts of the
results that must be stored awaiting possible
future protocols.
@retval EFI_NOT_FOUND Routing data doesn't match any known driver.
Progress set to the "G" in "GUID" of the routing
header that doesn't match. Note: There is no
requirement that all routing data be validated
before any configuration extraction.
@retval EFI_INVALID_PARAMETER For example, passing in a NULL for the Request
parameter would result in this type of error. The
Progress parameter is set to NULL.
@retval EFI_INVALID_PARAMETER Illegal syntax. Progress set to most recent &
before the error or the beginning of the string.
@retval EFI_INVALID_PARAMETER Unknown name. Progress points to the & before the
name in question.
**/
EFI_STATUS
EFIAPI
HiiConfigRoutingExtractConfig (
IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
IN CONST EFI_STRING Request,
OUT EFI_STRING *Progress,
OUT EFI_STRING *Results
)
{
HII_DATABASE_PRIVATE_DATA *Private;
EFI_STRING StringPtr;
EFI_STRING ConfigRequest;
UINTN Length;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_STATUS Status;
LIST_ENTRY *Link;
HII_DATABASE_RECORD *Database;
UINT8 *DevicePathPkg;
UINT8 *CurrentDevicePath;
EFI_HANDLE DriverHandle;
EFI_HII_CONFIG_ACCESS_PROTOCOL *ConfigAccess;
EFI_STRING AccessProgress;
EFI_STRING AccessResults;
UINTN RemainSize;
EFI_STRING TmpPtr;
//
// For size reduction, please define PcdSupportFullConfigRoutingProtocol
// as FALSE. But this renders the system to not 100% compliant with
// UEFI 2.1. Use this with caution.
//
if (!FeaturePcdGet (PcdSupportFullConfigRoutingProtocol)) {
return EFI_UNSUPPORTED;
}
if (This == NULL || Progress == NULL || Results == NULL) {
return EFI_INVALID_PARAMETER;
}
if (Request == NULL) {
*Progress = NULL;
return EFI_INVALID_PARAMETER;
}
Private = CONFIG_ROUTING_DATABASE_PRIVATE_DATA_FROM_THIS (This);
StringPtr = Request;
*Progress = StringPtr;
//
// The first element of <MultiConfigRequest> should be
// <GuidHdr>, which is in 'GUID='<Guid> syntax.
//
if (StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) != 0) {
return EFI_INVALID_PARAMETER;
}
//
// Allocate a fix length of memory to store Results. Reallocate memory for
// Results if this fix length is insufficient.
//
*Results = (EFI_STRING) AllocateZeroPool (MAX_STRING_LENGTH);
if (*Results == NULL) {
return EFI_OUT_OF_RESOURCES;
}
while (*StringPtr != 0 && StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) == 0) {
//
// If parsing error, set Progress to the beginning of the <MultiConfigRequest>
// or most recent & before the error.
//
if (StringPtr == Request) {
*Progress = StringPtr;
} else {
*Progress = StringPtr - 1;
}
//
// Process each <ConfigRequest> of <MultiConfigRequest>
//
Length = CalculateConfigStringLen (StringPtr);
ConfigRequest = AllocateCopyPool ((Length + 1) * sizeof (CHAR16), StringPtr);
if (ConfigRequest == NULL) {
return EFI_OUT_OF_RESOURCES;
}
*(ConfigRequest + Length) = 0;
//
// Get the UEFI device path
//
Status = GetDevicePath (ConfigRequest, (UINT8 **) &DevicePath);
if (EFI_ERROR (Status)) {
SafeFreePool (ConfigRequest);
return Status;
}
//
// Find driver which matches the routing data.
//
DriverHandle = NULL;
for (Link = Private->DatabaseList.ForwardLink;
Link != &Private->DatabaseList;
Link = Link->ForwardLink
) {
Database = CR (Link, HII_DATABASE_RECORD, DatabaseEntry, HII_DATABASE_RECORD_SIGNATURE);
if ((DevicePathPkg = Database->PackageList->DevicePathPkg) != NULL) {
CurrentDevicePath = DevicePathPkg + sizeof (EFI_HII_PACKAGE_HEADER);
if (CompareMem (
DevicePath,
CurrentDevicePath,
GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *) CurrentDevicePath)
) == 0) {
DriverHandle = Database->DriverHandle;
break;
}
}
}
SafeFreePool (DevicePath);
if (DriverHandle == NULL) {
//
// Routing data does not match any known driver.
// Set Progress to the 'G' in "GUID" of the routing header.
//
*Progress = StringPtr;
SafeFreePool (ConfigRequest);
return EFI_NOT_FOUND;
}
//
// Call corresponding ConfigAccess protocol to extract settings
//
Status = gBS->HandleProtocol (
DriverHandle,
&gEfiHiiConfigAccessProtocolGuid,
(VOID **) &ConfigAccess
);
ASSERT_EFI_ERROR (Status);
Status = ConfigAccess->ExtractConfig (
ConfigAccess,
ConfigRequest,
&AccessProgress,
&AccessResults
);
if (EFI_ERROR (Status)) {
//
// AccessProgress indicates the parsing progress on <ConfigRequest>.
// Map it to the progress on <MultiConfigRequest> then return it.
//
RemainSize = StrSize (AccessProgress);
for (TmpPtr = StringPtr; CompareMem (TmpPtr, AccessProgress, RemainSize) != 0; TmpPtr++);
*Progress = TmpPtr;
SafeFreePool (ConfigRequest);
return Status;
}
//
// Attach this <ConfigAltResp> to a <MultiConfigAltResp>
//
ASSERT (*AccessProgress == 0);
Status = AppendToMultiString (Results, AccessResults);
ASSERT_EFI_ERROR (Status);
SafeFreePool (AccessResults);
AccessResults = NULL;
SafeFreePool (ConfigRequest);
ConfigRequest = NULL;
//
// Go to next <ConfigRequest> (skip '&').
//
StringPtr += Length;
if (*StringPtr == 0) {
*Progress = StringPtr;
break;
}
StringPtr++;
}
return EFI_SUCCESS;
}
/**
This function allows the caller to request the current configuration for the
entirety of the current HII database and returns the data in a
null-terminated Unicode string.
@param This A pointer to the EFI_HII_CONFIG_ROUTING_PROTOCOL
instance.
@param Results Null-terminated Unicode string in
<MultiConfigAltResp> format which has all values
filled in for the names in the Request string.
String to be allocated by the called function.
De-allocation is up to the caller.
@retval EFI_SUCCESS The Results string is filled with the values
corresponding to all requested names.
@retval EFI_OUT_OF_RESOURCES Not enough memory to store the parts of the
results that must be stored awaiting possible
future protocols.
@retval EFI_INVALID_PARAMETER For example, passing in a NULL for the Results
parameter would result in this type of error.
**/
EFI_STATUS
EFIAPI
HiiConfigRoutingExportConfig (
IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
OUT EFI_STRING *Results
)
{
EFI_STATUS Status;
HII_DATABASE_PRIVATE_DATA *Private;
LIST_ENTRY StorageListHdr;
HII_FORMSET_STORAGE *Storage;
LIST_ENTRY *Link;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
UINTN Length;
EFI_STRING PathHdr;
UINTN PathHdrSize;
EFI_STRING ConfigRequest;
UINTN RequestSize;
EFI_STRING StringPtr;
EFI_HII_CONFIG_ACCESS_PROTOCOL *ConfigAccess;
EFI_STRING AccessProgress;
EFI_STRING AccessResults;
//
// For size reduction, please define PcdSupportFullConfigRoutingProtocol
// as FALSE. But this renders the system to not 100% compliant with
// UEFI 2.1. Use this with caution.
//
if (!FeaturePcdGet (PcdSupportFullConfigRoutingProtocol)) {
return EFI_UNSUPPORTED;
}
if (This == NULL || Results == NULL) {
return EFI_INVALID_PARAMETER;
}
Private = CONFIG_ROUTING_DATABASE_PRIVATE_DATA_FROM_THIS (This);
InitializeListHead (&StorageListHdr);
Status = ExportAllStorage (&Private->HiiDatabase, &StorageListHdr);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Allocate a fix length of memory to store Results. Reallocate memory for
// Results if this fix length is insufficient.
//
*Results = (EFI_STRING) AllocateZeroPool (MAX_STRING_LENGTH);
if (*Results == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Parsing all formset storages.
//
for (Link = StorageListHdr.ForwardLink; Link != &StorageListHdr; Link = Link->ForwardLink) {
Storage = CR (Link, HII_FORMSET_STORAGE, Entry, HII_FORMSET_STORAGE_SIGNATURE);
//
// Find the corresponding device path instance
//
Status = gBS->HandleProtocol (
Storage->DriverHandle,
&gEfiDevicePathProtocolGuid,
(VOID **) &DevicePath
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Convert the device path binary to hex UNICODE %02x bytes in the same order
// as the device path resides in RAM memory.
//
Length = GetDevicePathSize (DevicePath);
PathHdrSize = (Length * 2 + 1) * sizeof (CHAR16);
PathHdr = (EFI_STRING) AllocateZeroPool (PathHdrSize);
if (PathHdr == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = BufferToHexString (PathHdr, (UINT8 *) DevicePath, Length);
ASSERT_EFI_ERROR (Status);
//
// Generate a <ConfigRequest> with one <ConfigHdr> and zero <RequestElement>.
// It means extract all possible configurations from this specific driver.
//
RequestSize = (StrLen (L"GUID=&NAME=&PATH=") + 32) * sizeof (CHAR16) + PathHdrSize;
if (Storage->Name != NULL) {
RequestSize += StrLen (Storage->Name) * 4 * sizeof (CHAR16);
}
ConfigRequest = (EFI_STRING) AllocateZeroPool (RequestSize);
if (ConfigRequest == NULL) {
SafeFreePool (PathHdr);
return EFI_OUT_OF_RESOURCES;
}
//
// Add <GuidHdr>
// <GuidHdr> ::= 'GUID='<Guid>
// Convert <Guid> in the same order as it resides in RAM memory.
//
StringPtr = ConfigRequest;
StrnCpy (StringPtr, L"GUID=", StrLen (L"GUID="));
StringPtr += StrLen (L"GUID=");
Status = BufferToHexString (StringPtr, (UINT8 *) (&Storage->Guid), sizeof (EFI_GUID));
ASSERT_EFI_ERROR (Status);
StringPtr += 32;
ASSERT (*StringPtr == 0);
*StringPtr = L'&';
StringPtr++;
//
// Add <NameHdr>
// <NameHdr> ::= 'NAME='<String>
//
StrnCpy (StringPtr, L"NAME=", StrLen (L"NAME="));
StringPtr += StrLen (L"NAME=");
if (Storage->Name != NULL) {
Length = (StrLen (Storage->Name) * 4 + 1) * sizeof (CHAR16);
Status = UnicodeToConfigString (StringPtr, &Length, Storage->Name);
ASSERT_EFI_ERROR (Status);
StringPtr += StrLen (Storage->Name) * 4;
}
*StringPtr = L'&';
StringPtr++;
//
// Add <PathHdr>
// <PathHdr> ::= '<PATH=>'<UEFI binary represented as hex UNICODE %02x>
//
StrnCpy (StringPtr, L"PATH=", StrLen (L"PATH="));
StringPtr += StrLen (L"PATH=");
StrCpy (StringPtr, PathHdr);
SafeFreePool (PathHdr);
PathHdr = NULL;
//
// BUGBUG: The "Implementation note" of ExportConfig() in UEFI spec makes the
// code somewhat complex. Let's TBD here whether a <ConfigRequest> or a <ConfigHdr>
// is required to call ConfigAccess.ExtractConfig().
//
// Here we use <ConfigHdr> to call ConfigAccess instance. It requires ConfigAccess
// to handle such kind of "ConfigRequest". It is not supported till now.
//
// Either the ExportConfig will be updated or the ConfigAccess.ExtractConfig()
// will be updated as soon as the decision is made.
//
// Route the request to corresponding ConfigAccess protocol to extract settings.
//
Status = gBS->HandleProtocol (
Storage->DriverHandle,
&gEfiHiiConfigAccessProtocolGuid,
(VOID **) &ConfigAccess
);
ASSERT_EFI_ERROR (Status);
Status = ConfigAccess->ExtractConfig (
ConfigAccess,
ConfigRequest,
&AccessProgress,
&AccessResults
);
if (EFI_ERROR (Status)) {
SafeFreePool (ConfigRequest);
SafeFreePool (AccessResults);
return EFI_INVALID_PARAMETER;
}
//
// Attach this <ConfigAltResp> to a <MultiConfigAltResp>
//
ASSERT (*AccessProgress == 0);
Status = AppendToMultiString (Results, AccessResults);
ASSERT_EFI_ERROR (Status);
SafeFreePool (AccessResults);
AccessResults = NULL;
SafeFreePool (ConfigRequest);
ConfigRequest = NULL;
}
//
// Free the exported storage resource
//
while (!IsListEmpty (&StorageListHdr)) {
Storage = CR (
StorageListHdr.ForwardLink,
HII_FORMSET_STORAGE,
Entry,
HII_FORMSET_STORAGE_SIGNATURE
);
RemoveEntryList (&Storage->Entry);
SafeFreePool (Storage->Name);
SafeFreePool (Storage);
}
return EFI_SUCCESS;
}
/**
This function processes the results of processing forms and routes it to the
appropriate handlers or storage.
@param This A pointer to the EFI_HII_CONFIG_ROUTING_PROTOCOL
instance.
@param Configuration A null-terminated Unicode string in
<MulltiConfigResp> format.
@param Progress A pointer to a string filled in with the offset of
the most recent & before the first failing name /
value pair (or the beginning of the string if the
failure is in the first name / value pair) or the
terminating NULL if all was successful.
@retval EFI_SUCCESS The results have been distributed or are awaiting
distribution.
@retval EFI_OUT_OF_RESOURCES Not enough memory to store the parts of the
results that must be stored awaiting possible
future protocols.
@retval EFI_INVALID_PARAMETER Passing in a NULL for the Configuration parameter
would result in this type of error.
@retval EFI_NOT_FOUND Target for the specified routing data was not
found.
**/
EFI_STATUS
EFIAPI
HiiConfigRoutingRouteConfig (
IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
IN CONST EFI_STRING Configuration,
OUT EFI_STRING *Progress
)
{
HII_DATABASE_PRIVATE_DATA *Private;
EFI_STRING StringPtr;
EFI_STRING ConfigResp;
UINTN Length;
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
LIST_ENTRY *Link;
HII_DATABASE_RECORD *Database;
UINT8 *DevicePathPkg;
UINT8 *CurrentDevicePath;
EFI_HANDLE DriverHandle;
EFI_HII_CONFIG_ACCESS_PROTOCOL *ConfigAccess;
EFI_STRING AccessProgress;
UINTN RemainSize;
EFI_STRING TmpPtr;
//
// For size reduction, please define PcdSupportFullConfigRoutingProtocol
// as FALSE. But this renders the system to not 100% compliant with
// UEFI 2.1. Use this with caution.
//
if (!FeaturePcdGet (PcdSupportFullConfigRoutingProtocol)) {
return EFI_UNSUPPORTED;
}
if (This == NULL || Progress == NULL) {
return EFI_INVALID_PARAMETER;
}
if (Configuration == NULL) {
*Progress = NULL;
return EFI_INVALID_PARAMETER;
}
Private = CONFIG_ROUTING_DATABASE_PRIVATE_DATA_FROM_THIS (This);
StringPtr = Configuration;
*Progress = StringPtr;
//
// The first element of <MultiConfigResp> should be
// <GuidHdr>, which is in 'GUID='<Guid> syntax.
//
if (StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) != 0) {
return EFI_INVALID_PARAMETER;
}
while (*StringPtr != 0 && StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) == 0) {
//
// If parsing error, set Progress to the beginning of the <MultiConfigResp>
// or most recent & before the error.
//
if (StringPtr == Configuration) {
*Progress = StringPtr;
} else {
*Progress = StringPtr - 1;
}
//
// Process each <ConfigResp> of <MultiConfigResp>
//
Length = CalculateConfigStringLen (StringPtr);
ConfigResp = AllocateCopyPool ((Length + 1) * sizeof (CHAR16), StringPtr);
if (ConfigResp == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Append '\0' to the end of ConfigRequest
//
*(ConfigResp + Length) = 0;
//
// Get the UEFI device path
//
Status = GetDevicePath (ConfigResp, (UINT8 **) &DevicePath);
if (EFI_ERROR (Status)) {
SafeFreePool (ConfigResp);
return Status;
}
//
// Find driver which matches the routing data.
//
DriverHandle = NULL;
for (Link = Private->DatabaseList.ForwardLink;
Link != &Private->DatabaseList;
Link = Link->ForwardLink
) {
Database = CR (Link, HII_DATABASE_RECORD, DatabaseEntry, HII_DATABASE_RECORD_SIGNATURE);
if ((DevicePathPkg = Database->PackageList->DevicePathPkg) != NULL) {
CurrentDevicePath = DevicePathPkg + sizeof (EFI_HII_PACKAGE_HEADER);
if (CompareMem (
DevicePath,
CurrentDevicePath,
GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *) CurrentDevicePath)
) == 0) {
DriverHandle = Database->DriverHandle;
break;
}
}
}
SafeFreePool (DevicePath);
if (DriverHandle == NULL) {
//
// Routing data does not match any known driver.
// Set Progress to the 'G' in "GUID" of the routing header.
//
*Progress = StringPtr;
SafeFreePool (ConfigResp);
return EFI_NOT_FOUND;
}
//
// Call corresponding ConfigAccess protocol to route settings
//
Status = gBS->HandleProtocol (
DriverHandle,
&gEfiHiiConfigAccessProtocolGuid,
(VOID **) &ConfigAccess
);
ASSERT_EFI_ERROR (Status);
Status = ConfigAccess->RouteConfig (
ConfigAccess,
ConfigResp,
&AccessProgress
);
if (EFI_ERROR (Status)) {
//
// AccessProgress indicates the parsing progress on <ConfigResp>.
// Map it to the progress on <MultiConfigResp> then return it.
//
RemainSize = StrSize (AccessProgress);
for (TmpPtr = StringPtr; CompareMem (TmpPtr, AccessProgress, RemainSize) != 0; TmpPtr++);
*Progress = TmpPtr;
SafeFreePool (ConfigResp);
return Status;
}
SafeFreePool (ConfigResp);
ConfigResp = NULL;
//
// Go to next <ConfigResp> (skip '&').
//
StringPtr += Length;
if (*StringPtr == 0) {
*Progress = StringPtr;
break;
}
StringPtr++;
}
return EFI_SUCCESS;
}
/**
This helper function is to be called by drivers to map configuration data
stored in byte array ("block") formats such as UEFI Variables into current
configuration strings.
@param This A pointer to the EFI_HII_CONFIG_ROUTING_PROTOCOL
instance.
@param ConfigRequest A null-terminated Unicode string in
<ConfigRequest> format.
@param Block Array of bytes defining the block's configuration.
@param BlockSize Length in bytes of Block.
@param Config Filled-in configuration string. String allocated
by the function. Returned only if call is
successful.
@param Progress A pointer to a string filled in with the offset of
the most recent & before the first failing
name/value pair (or the beginning of the string if
the failure is in the first name / value pair) or
the terminating NULL if all was successful.
@retval EFI_SUCCESS The request succeeded. Progress points to the null
terminator at the end of the ConfigRequest
string.
@retval EFI_OUT_OF_RESOURCES Not enough memory to allocate Config. Progress
points to the first character of ConfigRequest.
@retval EFI_INVALID_PARAMETER Passing in a NULL for the ConfigRequest or
Block parameter would result in this type of
error. Progress points to the first character of
ConfigRequest.
@retval EFI_DEVICE_ERROR Block not large enough. Progress undefined.
@retval EFI_INVALID_PARAMETER Encountered non <BlockName> formatted string.
Block is left updated and Progress points at
the "&" preceding the first non-<BlockName>.
**/
EFI_STATUS
EFIAPI
HiiBlockToConfig (
IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
IN CONST EFI_STRING ConfigRequest,
IN CONST UINT8 *Block,
IN CONST UINTN BlockSize,
OUT EFI_STRING *Config,
OUT EFI_STRING *Progress
)
{
HII_DATABASE_PRIVATE_DATA *Private;
EFI_STRING StringPtr;
UINTN Length;
EFI_STATUS Status;
EFI_STRING TmpPtr;
UINT8 *TmpBuffer;
UINTN Offset;
UINTN Width;
UINT8 *Value;
EFI_STRING ValueStr;
EFI_STRING ConfigElement;
if (This == NULL || Progress == NULL || Config == NULL) {
return EFI_INVALID_PARAMETER;
}
if (Block == NULL || ConfigRequest == NULL) {
*Progress = ConfigRequest;
return EFI_INVALID_PARAMETER;
}
Private = CONFIG_ROUTING_DATABASE_PRIVATE_DATA_FROM_THIS (This);
ASSERT (Private != NULL);
StringPtr = ConfigRequest;
ValueStr = NULL;
Value = NULL;
ConfigElement = NULL;
//
// Allocate a fix length of memory to store Results. Reallocate memory for
// Results if this fix length is insufficient.
//
*Config = (EFI_STRING) AllocateZeroPool (MAX_STRING_LENGTH);
if (*Config == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Jump <ConfigHdr>
//
if (StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) != 0) {
*Progress = StringPtr;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
while (*StringPtr != 0 && StrnCmp (StringPtr, L"PATH=", StrLen (L"PATH=")) != 0) {
StringPtr++;
}
if (*StringPtr == 0) {
*Progress = StringPtr;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
while (*StringPtr != L'&' && *StringPtr != 0) {
StringPtr++;
}
if (*StringPtr == 0) {
*Progress = StringPtr;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
//
// Skip '&'
//
StringPtr++;
//
// Copy <ConfigHdr> and an additional '&' to <ConfigResp>
//
Length = StringPtr - ConfigRequest;
CopyMem (*Config, ConfigRequest, Length * sizeof (CHAR16));
//
// Parse each <RequestElement> if exists
// Only <BlockName> format is supported by this help function.
// <BlockName> ::= 'OFFSET='<Number>&'WIDTH='<Number>
//
while (*StringPtr != 0 && StrnCmp (StringPtr, L"OFFSET=", StrLen (L"OFFSET=")) == 0) {
//
// Back up the header of one <BlockName>
//
TmpPtr = StringPtr;
StringPtr += StrLen (L"OFFSET=");
//
// Get Offset
//
Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
if (Status == EFI_OUT_OF_RESOURCES) {
*Progress = ConfigRequest;
goto Exit;
}
Offset = 0;
CopyMem (
&Offset,
TmpBuffer,
(((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)
);
SafeFreePool (TmpBuffer);
StringPtr += Length;
if (StrnCmp (StringPtr, L"&WIDTH=", StrLen (L"&WIDTH=")) != 0) {
*Progress = StringPtr - Length - StrLen (L"OFFSET=") - 1;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
StringPtr += StrLen (L"&WIDTH=");
//
// Get Width
//
Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
if (Status == EFI_OUT_OF_RESOURCES) {
*Progress = ConfigRequest;
goto Exit;
}
Width = 0;
CopyMem (
&Width,
TmpBuffer,
(((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)
);
SafeFreePool (TmpBuffer);
StringPtr += Length;
if (*StringPtr != 0 && *StringPtr != L'&') {
*Progress = StringPtr - Length - StrLen (L"&WIDTH=");
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
//
// Calculate Value and convert it to hex string.
//
if (Offset + Width > BlockSize) {
*Progress = StringPtr;
Status = EFI_DEVICE_ERROR;
goto Exit;
}
Value = (UINT8 *) AllocateZeroPool (Width);
if (Value == NULL) {
*Progress = ConfigRequest;
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
CopyMem (Value, (UINT8 *) Block + Offset, Width);
Length = Width * 2 + 1;
ValueStr = (EFI_STRING) AllocateZeroPool (Length * sizeof (CHAR16));
if (ValueStr == NULL) {
*Progress = ConfigRequest;
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
Status = BufToHexString (ValueStr, &Length, Value, Width);
ASSERT_EFI_ERROR (Status);
ToLower (ValueStr);
SafeFreePool (Value);
Value = NULL;
//
// Build a ConfigElement
//
Length += StringPtr - TmpPtr + 1 + StrLen (L"VALUE=");
ConfigElement = (EFI_STRING) AllocateZeroPool (Length * sizeof (CHAR16));
if (ConfigElement == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
CopyMem (ConfigElement, TmpPtr, (StringPtr - TmpPtr + 1) * sizeof (CHAR16));
if (*StringPtr == 0) {
*(ConfigElement + (StringPtr - TmpPtr)) = L'&';
}
*(ConfigElement + (StringPtr - TmpPtr) + 1) = 0;
StrCat (ConfigElement, L"VALUE=");
StrCat (ConfigElement, ValueStr);
AppendToMultiString (Config, ConfigElement);
SafeFreePool (ConfigElement);
SafeFreePool (ValueStr);
ConfigElement = NULL;
ValueStr = NULL;
//
// If '\0', parsing is finished. Otherwise skip '&' to continue
//
if (*StringPtr == 0) {
break;
}
AppendToMultiString (Config, L"&");
StringPtr++;
}
if (*StringPtr != 0) {
*Progress = StringPtr - 1;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
*Progress = StringPtr;
return EFI_SUCCESS;
Exit:
SafeFreePool (*Config);
SafeFreePool (ValueStr);
SafeFreePool (Value);
SafeFreePool (ConfigElement);
return Status;
}
/**
This helper function is to be called by drivers to map configuration strings
to configurations stored in byte array ("block") formats such as UEFI Variables.
@param This A pointer to the EFI_HII_CONFIG_ROUTING_PROTOCOL
instance.
@param ConfigResp A null-terminated Unicode string in <ConfigResp>
format.
@param Block A possibly null array of bytes representing the
current block. Only bytes referenced in the
ConfigResp string in the block are modified. If
this parameter is null or if the *BlockSize
parameter is (on input) shorter than required by
the Configuration string, only the BlockSize
parameter is updated and an appropriate status
(see below) is returned.
@param BlockSize The length of the Block in units of UINT8. On
input, this is the size of the Block. On output,
if successful, contains the index of the last
modified byte in the Block.
@param Progress On return, points to an element of the ConfigResp
string filled in with the offset of the most
recent '&' before the first failing name / value
pair (or the beginning of the string if the
failure is in the first name / value pair) or the
terminating NULL if all was successful.
@retval EFI_SUCCESS The request succeeded. Progress points to the null
terminator at the end of the ConfigResp string.
@retval EFI_OUT_OF_RESOURCES Not enough memory to allocate Config. Progress
points to the first character of ConfigResp.
@retval EFI_INVALID_PARAMETER Passing in a NULL for the ConfigResp or
Block parameter would result in this type of
error. Progress points to the first character of
ConfigResp.
@retval EFI_INVALID_PARAMETER Encountered non <BlockName> formatted name /
value pair. Block is left updated and
Progress points at the '&' preceding the first
non-<BlockName>.
**/
EFI_STATUS
EFIAPI
HiiConfigToBlock (
IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
IN CONST EFI_STRING ConfigResp,
IN OUT UINT8 *Block,
IN OUT UINTN *BlockSize,
OUT EFI_STRING *Progress
)
{
HII_DATABASE_PRIVATE_DATA *Private;
EFI_STRING StringPtr;
UINTN Length;
EFI_STATUS Status;
UINT8 *TmpBuffer;
UINTN Offset;
UINTN Width;
UINT8 *Value;
UINTN BufferSize;
if (This == NULL || BlockSize == NULL || Progress == NULL) {
return EFI_INVALID_PARAMETER;
}
if (ConfigResp == NULL || Block == NULL) {
*Progress = ConfigResp;
return EFI_INVALID_PARAMETER;
}
Private = CONFIG_ROUTING_DATABASE_PRIVATE_DATA_FROM_THIS (This);
ASSERT (Private != NULL);
StringPtr = ConfigResp;
BufferSize = *BlockSize;
Value = NULL;
//
// Jump <ConfigHdr>
//
if (StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) != 0) {
*Progress = StringPtr;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
while (*StringPtr != 0 && StrnCmp (StringPtr, L"PATH=", StrLen (L"PATH=")) != 0) {
StringPtr++;
}
if (*StringPtr == 0) {
*Progress = StringPtr;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
while (*StringPtr != L'&' && *StringPtr != 0) {
StringPtr++;
}
if (*StringPtr == 0) {
*Progress = StringPtr;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
//
// Skip '&'
//
StringPtr++;
//
// Parse each <ConfigElement> if exists
// Only <BlockConfig> format is supported by this help function.
// <BlockConfig> ::= 'OFFSET='<Number>&'WIDTH='<Number>&'VALUE='<Number>
//
while (*StringPtr != 0 && StrnCmp (StringPtr, L"OFFSET=", StrLen (L"OFFSET=")) == 0) {
StringPtr += StrLen (L"OFFSET=");
//
// Get Offset
//
Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
if (Status == EFI_OUT_OF_RESOURCES) {
*Progress = ConfigResp;
goto Exit;
}
Offset = 0;
CopyMem (
&Offset,
TmpBuffer,
(((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)
);
SafeFreePool (TmpBuffer);
StringPtr += Length;
if (StrnCmp (StringPtr, L"&WIDTH=", StrLen (L"&WIDTH=")) != 0) {
*Progress = StringPtr - Length - StrLen (L"OFFSET=") - 1;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
StringPtr += StrLen (L"&WIDTH=");
//
// Get Width
//
Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
if (Status == EFI_OUT_OF_RESOURCES) {
*Progress = ConfigResp;
goto Exit;
}
Width = 0;
CopyMem (
&Width,
TmpBuffer,
(((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)
);
SafeFreePool (TmpBuffer);
StringPtr += Length;
if (StrnCmp (StringPtr, L"&VALUE=", StrLen (L"&VALUE=")) != 0) {
*Progress = StringPtr - Length - StrLen (L"&WIDTH=");
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
StringPtr += StrLen (L"&VALUE=");
//
// Get Value
//
Status = GetValueOfNumber (StringPtr, &Value, &Length);
if (Status == EFI_OUT_OF_RESOURCES) {
*Progress = ConfigResp;
goto Exit;
}
StringPtr += Length;
if (*StringPtr != 0 && *StringPtr != L'&') {
*Progress = StringPtr - Length - 7;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
//
// Update the Block with configuration info
//
if (Offset + Width > BufferSize) {
return EFI_DEVICE_ERROR;
}
CopyMem (Block + Offset, Value, Width);
*BlockSize = Offset + Width - 1;
SafeFreePool (Value);
Value = NULL;
//
// If '\0', parsing is finished. Otherwise skip '&' to continue
//
if (*StringPtr == 0) {
break;
}
StringPtr++;
}
if (*StringPtr != 0) {
*Progress = StringPtr - 1;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
*Progress = StringPtr;
return EFI_SUCCESS;
Exit:
SafeFreePool (Value);
return Status;
}
/**
This helper function is to be called by drivers to extract portions of
a larger configuration string.
@param This A pointer to the EFI_HII_CONFIG_ROUTING_PROTOCOL
instance.
@param Configuration A null-terminated Unicode string in
<MultiConfigAltResp> format.
@param Guid A pointer to the GUID value to search for in the
routing portion of the ConfigResp string when
retrieving the requested data. If Guid is NULL,
then all GUID values will be searched for.
@param Name A pointer to the NAME value to search for in the
routing portion of the ConfigResp string when
retrieving the requested data. If Name is NULL,
then all Name values will be searched for.
@param DevicePath A pointer to the PATH value to search for in the
routing portion of the ConfigResp string when
retrieving the requested data. If DevicePath is
NULL, then all DevicePath values will be searched
for.
@param AltCfgId A pointer to the ALTCFG value to search for in the
routing portion of the ConfigResp string when
retrieving the requested data. If this parameter
is NULL, then the current setting will be
retrieved.
@param AltCfgResp A pointer to a buffer which will be allocated by
the function which contains the retrieved string
as requested. This buffer is only allocated if
the call was successful.
@retval EFI_SUCCESS The request succeeded. The requested data was
extracted and placed in the newly allocated
AltCfgResp buffer.
@retval EFI_OUT_OF_RESOURCES Not enough memory to allocate AltCfgResp.
@retval EFI_INVALID_PARAMETER Any parameter is invalid.
@retval EFI_NOT_FOUND Target for the specified routing data was not
found.
**/
EFI_STATUS
EFIAPI
HiiGetAltCfg (
IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
IN CONST EFI_STRING Configuration,
IN CONST EFI_GUID *Guid,
IN CONST EFI_STRING Name,
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
IN CONST UINT16 *AltCfgId,
OUT EFI_STRING *AltCfgResp
)
{
EFI_STATUS Status;
EFI_STRING StringPtr;
EFI_STRING HdrStart;
EFI_STRING HdrEnd;
EFI_STRING TmpPtr;
UINTN Length;
EFI_STRING GuidStr;
EFI_STRING NameStr;
EFI_STRING PathStr;
EFI_STRING AltIdStr;
EFI_STRING Result;
BOOLEAN GuidFlag;
BOOLEAN NameFlag;
BOOLEAN PathFlag;
//
// For size reduction, please define PcdSupportFullConfigRoutingProtocol
// as FALSE. But this renders the system to not 100% compliant with
// UEFI 2.1. Use this with caution.
//
if (!FeaturePcdGet (PcdSupportFullConfigRoutingProtocol)) {
return EFI_UNSUPPORTED;
}
HdrStart = NULL;
HdrEnd = NULL;
GuidStr = NULL;
NameStr = NULL;
PathStr = NULL;
AltIdStr = NULL;
Result = NULL;
GuidFlag = FALSE;
NameFlag = FALSE;
PathFlag = FALSE;
if (This == NULL || Configuration == NULL || AltCfgResp == NULL) {
return EFI_INVALID_PARAMETER;
}
StringPtr = Configuration;
if (StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) != 0) {
return EFI_INVALID_PARAMETER;
}
//
// Generate the sub string for later matching.
//
GenerateSubStr (L"GUID=", sizeof (EFI_GUID), (VOID *) Guid, 1, &GuidStr);
GenerateSubStr (
L"PATH=",
GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *) DevicePath),
(VOID *) DevicePath,
1,
&PathStr
);
if (AltCfgId != NULL) {
GenerateSubStr (L"ALTCFG=", sizeof (UINT16), (VOID *) AltCfgId, 3, &AltIdStr);
}
if (Name != NULL) {
GenerateSubStr (L"NAME=", StrLen (Name) * sizeof (CHAR16), (VOID *) Name, 2, &NameStr);
} else {
GenerateSubStr (L"NAME=", 0, NULL, 2, &NameStr);
}
while (*StringPtr != 0) {
//
// Try to match the GUID
//
if (!GuidFlag) {
TmpPtr = StrStr (StringPtr, GuidStr);
if (TmpPtr == NULL) {
Status = EFI_NOT_FOUND;
goto Exit;
}
HdrStart = TmpPtr;
//
// Jump to <NameHdr>
//
if (Guid != NULL) {
StringPtr = TmpPtr + StrLen (GuidStr);
} else {
StringPtr = StrStr (TmpPtr, L"NAME=");
if (StringPtr == NULL) {
Status = EFI_NOT_FOUND;
goto Exit;
}
}
GuidFlag = TRUE;
}
//
// Try to match the NAME
//
if (GuidFlag && !NameFlag) {
if (StrnCmp (StringPtr, NameStr, StrLen (NameStr)) != 0) {
GuidFlag = FALSE;
} else {
//
// Jump to <PathHdr>
//
if (Name != NULL) {
StringPtr += StrLen (NameStr);
} else {
StringPtr = StrStr (StringPtr, L"PATH=");
if (StringPtr == NULL) {
Status = EFI_NOT_FOUND;
goto Exit;
}
}
NameFlag = TRUE;
}
}
//
// Try to match the DevicePath
//
if (GuidFlag && NameFlag && !PathFlag) {
if (StrnCmp (StringPtr, PathStr, StrLen (PathStr)) != 0) {
GuidFlag = FALSE;
NameFlag = FALSE;
} else {
//
// Jump to '&' before <DescHdr> or <ConfigBody>
//
if (DevicePath != NULL) {
StringPtr += StrLen (PathStr);
} else {
StringPtr = StrStr (StringPtr, L"&");
if (StringPtr == NULL) {
Status = EFI_NOT_FOUND;
goto Exit;
}
}
PathFlag = TRUE;
HdrEnd = ++StringPtr;
}
}
//
// Try to match the AltCfgId
//
if (GuidFlag && NameFlag && PathFlag) {
if (AltCfgId == NULL) {
//
// Return Current Setting when AltCfgId is NULL.
//
Status = OutputConfigBody (StringPtr, &Result);
goto Exit;
}
//
// Search the <ConfigAltResp> to get the <AltResp> with AltCfgId.
//
if (StrnCmp (StringPtr, AltIdStr, StrLen (AltIdStr)) != 0) {
GuidFlag = FALSE;
NameFlag = FALSE;
PathFlag = FALSE;
} else {
Status = OutputConfigBody (StringPtr, &Result);
goto Exit;
}
}
}
Status = EFI_NOT_FOUND;
Exit:
if (!EFI_ERROR (Status)) {
//
// Copy the <ConfigHdr> and <ConfigBody>
//
Length = HdrEnd - HdrStart + StrLen (Result);
*AltCfgResp = AllocateZeroPool (Length * sizeof (CHAR16));
if (*AltCfgResp == NULL) {
Status = EFI_OUT_OF_RESOURCES;
} else {
StrnCpy (*AltCfgResp, HdrStart, HdrEnd - HdrStart);
StrCat (*AltCfgResp, Result);
Status = EFI_SUCCESS;
}
}
SafeFreePool (GuidStr);
SafeFreePool (NameStr);
SafeFreePool (PathStr);
SafeFreePool (AltIdStr);
SafeFreePool (Result);
return Status;
}
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