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audk/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c

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/** @file
Implementation of interfaces function for EFI_HII_CONFIG_ROUTING_PROTOCOL.
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.
**/
#include "HiiDatabase.h"
extern HII_DATABASE_PRIVATE_DATA mPrivate;
/**
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
)
{
EFI_STRING TmpPtr;
//
// "GUID=" should be the first element of incoming string.
//
ASSERT (String != NULL);
ASSERT (StrnCmp (String, L"GUID=", StrLen (L"GUID=")) == 0);
//
// The beginning of next <ConfigRequest>/<ConfigResp> should be "&GUID=".
// Will meet '\0' if there is only one <ConfigRequest>/<ConfigResp>.
//
TmpPtr = StrStr (String, L"&GUID=");
if (TmpPtr == NULL) {
return StrLen (String);
}
return (TmpPtr - String);
}
/**
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;
UINT8 *DevicePathBuffer;
CHAR16 TemStr[2];
UINTN Index;
UINT8 DigitUint8;
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.
//
DevicePathBuffer = (UINT8 *) AllocateZeroPool ((Length + 1) / 2);
if (DevicePathBuffer == NULL) {
FreePool (DevicePathString);
return EFI_OUT_OF_RESOURCES;
}
ZeroMem (TemStr, sizeof (TemStr));
for (Index = 0; DevicePathString[Index] != L'\0'; Index ++) {
TemStr[0] = DevicePathString[Index];
DigitUint8 = (UINT8) StrHexToUint64 (TemStr);
if ((Index & 1) == 0) {
DevicePathBuffer [Index/2] = DigitUint8;
} else {
DevicePathBuffer [Index/2] = (UINT8) ((DevicePathBuffer [Index/2] << 4) + DigitUint8);
}
}
FreePool (DevicePathString);
*DevicePath = DevicePathBuffer;
return EFI_SUCCESS;
}
/**
Converts the unicode character of the string from uppercase to lowercase.
This is a internal function.
@param Str String to be converted
**/
VOID
EFIAPI
HiiToLower (
IN EFI_STRING ConfigString
)
{
EFI_STRING String;
BOOLEAN Lower;
ASSERT (ConfigString != NULL);
//
// Convert all hex digits in range [A-F] in the configuration header to [a-f]
//
for (String = ConfigString, Lower = FALSE; *String != L'\0'; String++) {
if (*String == L'=') {
Lower = TRUE;
} else if (*String == L'&') {
Lower = FALSE;
} else if (Lower && *String >= L'A' && *String <= L'F') {
*String = (CHAR16) (*String - L'A' + L'a');
}
}
return;
}
/**
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_STRING StringHeader;
CHAR16 *TemString;
CHAR16 *TemName;
UINT8 *TemBuffer;
UINTN Index;
ASSERT (String != NULL && SubStr != NULL);
if (Buffer == NULL) {
*SubStr = AllocateCopyPool (StrSize (String), String);
ASSERT (*SubStr != NULL);
return ;
}
//
// Header + Data + '&' + '\0'
//
Length = StrLen (String) + BufferLen * 2 + 1 + 1;
Str = AllocateZeroPool (Length * sizeof (CHAR16));
ASSERT (Str != NULL);
StrCpy (Str, String);
Length = (BufferLen * 2 + 1) * sizeof (CHAR16);
StringHeader = Str + StrLen (String);
TemString = (CHAR16 *) StringHeader;
switch (Flag) {
case 1:
//
// Convert Buffer to Hex String in reverse order
//
TemBuffer = ((UINT8 *) Buffer);
for (Index = 0; Index < BufferLen; Index ++, TemBuffer ++) {
TemString += UnicodeValueToString (TemString, PREFIX_ZERO | RADIX_HEX, *TemBuffer, 2);
}
break;
case 2:
//
// Check buffer is enough
//
TemName = (CHAR16 *) Buffer;
ASSERT ((BufferLen * 2 + 1) >= (StrLen (TemName) * 4 + 1));
//
// Convert Unicode String to Config String, e.g. "ABCD" => "0041004200430044"
//
for (; *TemName != L'\0'; TemName++) {
TemString += UnicodeValueToString (TemString, PREFIX_ZERO | RADIX_HEX, *TemName, 4);
}
break;
case 3:
//
// Convert Buffer to Hex String
//
TemBuffer = ((UINT8 *) Buffer) + BufferLen - 1;
for (Index = 0; Index < BufferLen; Index ++, TemBuffer --) {
TemString += UnicodeValueToString (TemString, PREFIX_ZERO | RADIX_HEX, *TemBuffer, 2);
}
break;
default:
break;
}
//
// Convert the uppercase to lowercase since <HexAf> is defined in lowercase format.
//
StrCat (Str, L"&");
HiiToLower (Str);
*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;
}
//
// The setting information should start OFFSET, not ALTCFG.
//
if (StrnCmp (String, L"&ALTCFG=", StrLen (L"&ALTCFG=")) == 0) {
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;
}
/**
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 (
MultiStringSize,
MultiStringSize + AppendStringSize,
(VOID *) (*MultiString)
);
ASSERT (*MultiString != NULL);
}
//
// 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;
UINT8 DigitUint8;
UINTN Index;
CHAR16 TemStr[2];
ASSERT (StringPtr != NULL && Number != NULL && Len != NULL);
ASSERT (*StringPtr != L'\0');
Buf = NULL;
TmpPtr = StringPtr;
while (*StringPtr != L'\0' && *StringPtr != L'&') {
StringPtr++;
}
*Len = StringPtr - TmpPtr;
Length = *Len + 1;
Str = (EFI_STRING) AllocateZeroPool (Length * sizeof (CHAR16));
if (Str == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
CopyMem (Str, TmpPtr, *Len * sizeof (CHAR16));
*(Str + *Len) = L'\0';
Length = (Length + 1) / 2;
Buf = (UINT8 *) AllocateZeroPool (Length);
if (Buf == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
Length = *Len;
ZeroMem (TemStr, sizeof (TemStr));
for (Index = 0; Index < Length; Index ++) {
TemStr[0] = Str[Length - Index - 1];
DigitUint8 = (UINT8) StrHexToUint64 (TemStr);
if ((Index & 1) == 0) {
Buf [Index/2] = DigitUint8;
} else {
Buf [Index/2] = (UINT8) ((DigitUint8 << 4) + Buf [Index/2]);
}
}
*Number = Buf;
Status = EFI_SUCCESS;
Exit:
if (Str != NULL) {
FreePool (Str);
}
return Status;
}
/**
This function merges DefaultAltCfgResp string into AltCfgResp string for
the missing AltCfgId in AltCfgResq.
@param AltCfgResp Pointer to a null-terminated Unicode string in
<ConfigAltResp> format. The default value string
will be merged into it.
@param DefaultAltCfgResp Pointer to a null-terminated Unicode string in
<MultiConfigAltResp> format. The default value
string may contain more than one ConfigAltResp
string for the different varstore buffer.
@retval EFI_SUCCESS The merged string returns.
@retval EFI_INVALID_PARAMETER *AltCfgResp is to NULL.
**/
EFI_STATUS
EFIAPI
MergeDefaultString (
IN OUT EFI_STRING *AltCfgResp,
IN EFI_STRING DefaultAltCfgResp
)
{
EFI_STRING StringPtrDefault;
EFI_STRING StringPtrEnd;
CHAR16 TempChar;
EFI_STRING StringPtr;
EFI_STRING AltConfigHdr;
UINTN HeaderLength;
UINTN SizeAltCfgResp;
if (*AltCfgResp == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Get the requestr ConfigHdr
//
SizeAltCfgResp = 0;
StringPtr = *AltCfgResp;
//
// Find <ConfigHdr> GUID=...&NAME=...&PATH=...
//
if (StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) != 0) {
return EFI_INVALID_PARAMETER;
}
while (*StringPtr != L'\0' && StrnCmp (StringPtr, L"&NAME=", StrLen (L"&NAME=")) != 0) {
StringPtr++;
}
while (*StringPtr != L'\0' && StrnCmp (StringPtr, L"&PATH=", StrLen (L"&PATH=")) != 0) {
StringPtr++;
}
if (*StringPtr == L'\0') {
return EFI_INVALID_PARAMETER;
}
StringPtr += StrLen (L"&PATH=");
while (*StringPtr != L'\0' && *StringPtr != L'&') {
StringPtr ++;
}
HeaderLength = StringPtr - *AltCfgResp;
//
// Construct AltConfigHdr string "&<ConfigHdr>&ALTCFG=XXXX\0"
// |1| StrLen (ConfigHdr) | 8 | 4 | 1 |
//
AltConfigHdr = AllocateZeroPool ((1 + HeaderLength + 8 + 4 + 1) * sizeof (CHAR16));
if (AltConfigHdr == NULL) {
return EFI_OUT_OF_RESOURCES;
}
StrCpy (AltConfigHdr, L"&");
StrnCat (AltConfigHdr, *AltCfgResp, HeaderLength);
StrCat (AltConfigHdr, L"&ALTCFG=");
HeaderLength = StrLen (AltConfigHdr);
StringPtrDefault = StrStr (DefaultAltCfgResp, AltConfigHdr);
while (StringPtrDefault != NULL) {
//
// Get AltCfg Name
//
StrnCat (AltConfigHdr, StringPtrDefault + HeaderLength, 4);
StringPtr = StrStr (*AltCfgResp, AltConfigHdr);
//
// Append the found default value string to the input AltCfgResp
//
if (StringPtr == NULL) {
StringPtrEnd = StrStr (StringPtrDefault + 1, L"&GUID");
SizeAltCfgResp = StrSize (*AltCfgResp);
if (StringPtrEnd == NULL) {
//
// No more default string is found.
//
*AltCfgResp = (EFI_STRING) ReallocatePool (
SizeAltCfgResp,
SizeAltCfgResp + StrSize (StringPtrDefault),
(VOID *) (*AltCfgResp)
);
StrCat (*AltCfgResp, StringPtrDefault);
break;
} else {
TempChar = *StringPtrEnd;
*StringPtrEnd = L'\0';
*AltCfgResp = (EFI_STRING) ReallocatePool (
SizeAltCfgResp,
SizeAltCfgResp + StrSize (StringPtrDefault),
(VOID *) (*AltCfgResp)
);
StrCat (*AltCfgResp, StringPtrDefault);
*StringPtrEnd = TempChar;
}
}
//
// Find next AltCfg String
//
*(AltConfigHdr + HeaderLength) = L'\0';
StringPtrDefault = StrStr (StringPtrDefault + 1, AltConfigHdr);
}
return EFI_SUCCESS;
}
/**
This function finds the matched DefaultName for the input DefaultId
@param DefaultIdArray Array stores the map table between DefaultId and DefaultName.
@param VarDefaultId Default Id
@param VarDefaultName Default Name string ID for the input default ID.
@retval EFI_SUCCESS The mapped default name string ID is found.
@retval EFI_NOT_FOUND The mapped default name string ID is not found.
**/
EFI_STATUS
FindDefaultName (
IN IFR_DEFAULT_DATA *DefaultIdArray,
IN UINT16 VarDefaultId,
OUT EFI_STRING_ID *VarDefaultName
)
{
LIST_ENTRY *Link;
IFR_DEFAULT_DATA *DefaultData;
for (Link = DefaultIdArray->Entry.ForwardLink; Link != &DefaultIdArray->Entry; Link = Link->ForwardLink) {
DefaultData = BASE_CR (Link, IFR_DEFAULT_DATA, Entry);
if (DefaultData->DefaultId == VarDefaultId) {
*VarDefaultName = DefaultData->DefaultName;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
This function inserts new DefaultValueData into the BlockData DefaultValue array.
@param BlockData The BlockData is updated to add new default value.
@param DefaultValueData The DefaultValue is added.
**/
VOID
InsertDefaultValue (
IN IFR_BLOCK_DATA *BlockData,
IN IFR_DEFAULT_DATA *DefaultValueData
)
{
LIST_ENTRY *Link;
IFR_DEFAULT_DATA *DefaultValueArray;
for (Link = BlockData->DefaultValueEntry.ForwardLink; Link != &BlockData->DefaultValueEntry; Link = Link->ForwardLink) {
DefaultValueArray = BASE_CR (Link, IFR_DEFAULT_DATA, Entry);
if (DefaultValueArray->DefaultId == DefaultValueData->DefaultId) {
//
// Update the default value array in BlockData.
//
DefaultValueArray->Value = DefaultValueData->Value;
FreePool (DefaultValueData);
return;
} else if (DefaultValueArray->DefaultId > DefaultValueData->DefaultId) {
//
// Insert new default value data in the front of this default value array.
//
InsertTailList (Link, &DefaultValueData->Entry);
return;
}
}
//
// Insert new default value data in tail.
//
InsertTailList (Link, &DefaultValueData->Entry);
return;
}
/**
This function inserts new BlockData into the block link
@param BlockLink The list entry points to block array.
@param BlockData The point to BlockData is added.
**/
VOID
InsertBlockData (
IN LIST_ENTRY *BlockLink,
IN IFR_BLOCK_DATA **BlockData
)
{
LIST_ENTRY *Link;
IFR_BLOCK_DATA *BlockArray;
IFR_BLOCK_DATA *BlockSingleData;
BlockSingleData = *BlockData;
//
// Insert block data in its Offset and Width order.
//
for (Link = BlockLink->ForwardLink; Link != BlockLink; Link = Link->ForwardLink) {
BlockArray = BASE_CR (Link, IFR_BLOCK_DATA, Entry);
if (BlockArray->Offset == BlockSingleData->Offset) {
if (BlockArray->Width > BlockSingleData->Width) {
//
// Insert this block data in the front of block array
//
InsertTailList (Link, &BlockSingleData->Entry);
return;
}
if (BlockArray->Width == BlockSingleData->Width) {
//
// The same block array has been added.
//
FreePool (BlockSingleData);
*BlockData = BlockArray;
return;
}
} else if (BlockArray->Offset > BlockSingleData->Offset) {
//
// Insert new block data in the front of block array
//
InsertTailList (Link, &BlockSingleData->Entry);
return;
}
}
//
// Add new block data into the tail.
//
InsertTailList (Link, &BlockSingleData->Entry);
return;
}
/**
This function checks VarOffset and VarWidth is in the block range.
@param BlockArray The block array is to be checked.
@param VarOffset Offset of var to the structure
@param VarWidth Width of var.
@retval TRUE This Var is in the block range.
@retval FALSE This Var is not in the block range.
**/
BOOLEAN
BlockArrayCheck (
IN IFR_BLOCK_DATA *RequestBlockArray,
IN UINT16 VarOffset,
IN UINT16 VarWidth
)
{
LIST_ENTRY *Link;
IFR_BLOCK_DATA *BlockData;
//
// No Request Block array, all vars are got.
//
if (RequestBlockArray == NULL) {
return TRUE;
}
//
// Check the input var is in the request block range.
//
for (Link = RequestBlockArray->Entry.ForwardLink; Link != &RequestBlockArray->Entry; Link = Link->ForwardLink) {
BlockData = BASE_CR (Link, IFR_BLOCK_DATA, Entry);
if ((VarOffset >= BlockData->Offset) && ((VarOffset + VarWidth) <= (BlockData->Offset + BlockData->Width))) {
return TRUE;
}
}
return FALSE;
}
/**
This function parses Form Package to get the block array and the default
value array according to the request ConfigHdr.
@param Package Pointer to the form package data.
@param PackageLength Length of the pacakge.
@param ConfigHdr Request string ConfigHdr. If it is NULL,
the first found varstore will be as ConfigHdr.
@param RequestBlockArray The block array is retrieved from the request string.
@param VarStorageData VarStorage structure contains the got block and default value.
@param PIfrDefaultIdArray Point to the got default id and default name array.
@retval EFI_SUCCESS The block array and the default value array are got.
@retval EFI_INVALID_PARAMETER The varstore defintion in the differnt form pacakges
are conflicted.
@retval EFI_OUT_OF_RESOURCES No enough memory.
**/
EFI_STATUS
EFIAPI
ParseIfrData (
IN UINT8 *Package,
IN UINT32 PackageLenth,
IN EFI_STRING ConfigHdr,
IN IFR_BLOCK_DATA *RequestBlockArray,
IN OUT IFR_VARSTORAGE_DATA *VarStorageData,
OUT IFR_DEFAULT_DATA **PIfrDefaultIdArray
)
{
EFI_STATUS Status;
UINTN IfrOffset;
EFI_IFR_VARSTORE *IfrVarStore;
EFI_IFR_OP_HEADER *IfrOpHdr;
EFI_IFR_ONE_OF *IfrOneOf;
EFI_IFR_ONE_OF_OPTION *IfrOneOfOption;
EFI_IFR_DEFAULT *IfrDefault;
EFI_IFR_ORDERED_LIST *IfrOrderedList;
EFI_IFR_CHECKBOX *IfrCheckBox;
EFI_IFR_PASSWORD *IfrPassword;
EFI_IFR_STRING *IfrString;
IFR_DEFAULT_DATA *DefaultIdArray;
IFR_DEFAULT_DATA *DefaultData;
IFR_BLOCK_DATA *BlockData;
CHAR16 *VarStoreName;
UINT16 VarOffset;
UINT16 VarWidth;
EFI_STRING_ID VarDefaultName;
UINT16 VarDefaultId;
EFI_STRING GuidStr;
EFI_STRING NameStr;
EFI_STRING TempStr;
UINTN LengthString;
//
// Initialize DefaultIdArray to store the map between DeaultId and DefaultName
//
LengthString = 0;
Status = EFI_SUCCESS;
GuidStr = NULL;
NameStr = NULL;
TempStr = NULL;
BlockData = NULL;
DefaultData = NULL;
DefaultIdArray = (IFR_DEFAULT_DATA *) AllocateZeroPool (sizeof (IFR_DEFAULT_DATA));
if (DefaultIdArray == NULL) {
return EFI_OUT_OF_RESOURCES;
}
InitializeListHead (&DefaultIdArray->Entry);
//
// Go through the form package to parse OpCode one by one.
//
IfrOffset = sizeof (EFI_HII_PACKAGE_HEADER);
while (IfrOffset < PackageLenth) {
IfrOpHdr = (EFI_IFR_OP_HEADER *) (Package + IfrOffset);
switch (IfrOpHdr->OpCode) {
case EFI_IFR_VARSTORE_OP:
//
// VarStore is found. Don't need to search any more.
//
if (VarStorageData->Size != 0) {
break;
}
//
// Get the requied varstore information
// Add varstore by Guid and Name in ConfigHdr
// Make sure Offset is in varstore size and varstoreid
//
IfrVarStore = (EFI_IFR_VARSTORE *) IfrOpHdr;
VarStoreName = AllocateZeroPool (AsciiStrSize ((CHAR8 *)IfrVarStore->Name) * sizeof (CHAR16));
if (VarStoreName == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
AsciiStrToUnicodeStr ((CHAR8 *) IfrVarStore->Name, VarStoreName);
GenerateSubStr (L"GUID=", sizeof (EFI_GUID), (VOID *) &IfrVarStore->Guid, 1, &GuidStr);
GenerateSubStr (L"NAME=", StrLen (VarStoreName) * sizeof (CHAR16), (VOID *) VarStoreName, 2, &NameStr);
LengthString = StrLen (GuidStr);
LengthString = LengthString + StrLen (NameStr) + 1;
TempStr = AllocateZeroPool (LengthString * sizeof (CHAR16));
if (TempStr == NULL) {
FreePool (GuidStr);
FreePool (NameStr);
FreePool (VarStoreName);
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
StrCpy (TempStr, GuidStr);
StrCat (TempStr, NameStr);
if (ConfigHdr == NULL || StrnCmp (ConfigHdr, TempStr, StrLen (TempStr)) == 0) {
//
// Find the matched VarStore
//
CopyGuid (&VarStorageData->Guid, (EFI_GUID *) (VOID *) &IfrVarStore->Guid);
VarStorageData->VarStoreId = IfrVarStore->VarStoreId;
VarStorageData->Size = IfrVarStore->Size;
VarStorageData->Name = VarStoreName;
} else {
//
// No found, free the allocated memory
//
FreePool (VarStoreName);
}
//
// Free alllocated temp string.
//
FreePool (GuidStr);
FreePool (NameStr);
FreePool (TempStr);
break;
case EFI_IFR_DEFAULTSTORE_OP:
//
// Add new the map between default id and default name.
//
DefaultData = (IFR_DEFAULT_DATA *) AllocateZeroPool (sizeof (IFR_DEFAULT_DATA));
if (DefaultData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
DefaultData->DefaultId = ((EFI_IFR_DEFAULTSTORE *) IfrOpHdr)->DefaultId;
DefaultData->DefaultName = ((EFI_IFR_DEFAULTSTORE *) IfrOpHdr)->DefaultName;
InsertTailList (&DefaultIdArray->Entry, &DefaultData->Entry);
DefaultData = NULL;
break;
case EFI_IFR_FORM_OP:
//
// No matched varstore is found and directly return.
//
if (VarStorageData->Size == 0) {
Status = EFI_SUCCESS;
goto Done;
}
break;
case EFI_IFR_ONE_OF_OP:
case EFI_IFR_NUMERIC_OP:
//
// Numeric and OneOf has the same opcode structure.
//
//
// Check whether this question is for the requested varstore.
//
IfrOneOf = (EFI_IFR_ONE_OF *) IfrOpHdr;
if (IfrOneOf->Question.VarStoreId != VarStorageData->VarStoreId) {
break;
}
//
// Get Offset/Width by Question header and OneOf Flags
//
VarOffset = IfrOneOf->Question.VarStoreInfo.VarOffset;
VarWidth = (UINT16) (1 << (IfrOneOf->Flags & EFI_IFR_NUMERIC_SIZE));
//
// Check whether this question is in requested block array.
//
if (!BlockArrayCheck (RequestBlockArray, VarOffset, VarWidth)) {
//
// This question is not in the requested string. Skip it.
//
break;
}
//
// Check this var question is in the var storage
//
if ((VarOffset + VarWidth) > VarStorageData->Size) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Set Block Data
//
BlockData = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
if (BlockData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
BlockData->Offset = VarOffset;
BlockData->Width = VarWidth;
BlockData->QuestionId = IfrOneOf->Question.QuestionId;
BlockData->OpCode = IfrOpHdr->OpCode;
BlockData->Scope = IfrOpHdr->Scope;
InitializeListHead (&BlockData->DefaultValueEntry);
//
// Add Block Data into VarStorageData BlockEntry
//
InsertBlockData (&VarStorageData->BlockEntry, &BlockData);
break;
case EFI_IFR_ORDERED_LIST_OP:
//
// offset by question header
// width by EFI_IFR_ORDERED_LIST MaxContainers * OneofOption Type
// no default value and default id, how to define its default value?
//
//
// Check whether this question is for the requested varstore.
//
IfrOrderedList = (EFI_IFR_ORDERED_LIST *) IfrOpHdr;
if (IfrOrderedList->Question.VarStoreId != VarStorageData->VarStoreId) {
break;
}
//
// Get Offset/Width by Question header and OneOf Flags
//
VarOffset = IfrOrderedList->Question.VarStoreInfo.VarOffset;
VarWidth = IfrOrderedList->MaxContainers;
//
// Check whether this question is in requested block array.
//
if (!BlockArrayCheck (RequestBlockArray, VarOffset, VarWidth)) {
//
// This question is not in the requested string. Skip it.
//
break;
}
//
// Check this var question is in the var storage
//
if ((VarOffset + VarWidth) > VarStorageData->Size) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Set Block Data
//
BlockData = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
if (BlockData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
BlockData->Offset = VarOffset;
BlockData->Width = VarWidth;
BlockData->QuestionId = IfrOrderedList->Question.QuestionId;
BlockData->OpCode = IfrOpHdr->OpCode;
BlockData->Scope = IfrOpHdr->Scope;
InitializeListHead (&BlockData->DefaultValueEntry);
//
// Add Block Data into VarStorageData BlockEntry
//
InsertBlockData (&VarStorageData->BlockEntry, &BlockData);
break;
case EFI_IFR_CHECKBOX_OP:
//
// EFI_IFR_DEFAULT_OP
// offset by question header
// width is 1 sizeof (BOOLEAN)
// default id by CheckBox Flags if CheckBox flags (Default or Mau) is set, the default value is 1 to be set.
// value by DefaultOption
// default id by DeaultOption DefaultId can override CheckBox Flags and Default value.
//
//
// Check whether this question is for the requested varstore.
//
IfrCheckBox = (EFI_IFR_CHECKBOX *) IfrOpHdr;
if (IfrCheckBox->Question.VarStoreId != VarStorageData->VarStoreId) {
break;
}
//
// Get Offset/Width by Question header and OneOf Flags
//
VarOffset = IfrCheckBox->Question.VarStoreInfo.VarOffset;
VarWidth = sizeof (BOOLEAN);
//
// Check whether this question is in requested block array.
//
if (!BlockArrayCheck (RequestBlockArray, VarOffset, VarWidth)) {
//
// This question is not in the requested string. Skip it.
//
break;
}
//
// Check this var question is in the var storage
//
if ((VarOffset + VarWidth) > VarStorageData->Size) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Set Block Data
//
BlockData = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
if (BlockData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
BlockData->Offset = VarOffset;
BlockData->Width = VarWidth;
BlockData->QuestionId = IfrCheckBox->Question.QuestionId;
BlockData->OpCode = IfrOpHdr->OpCode;
BlockData->Scope = IfrOpHdr->Scope;
InitializeListHead (&BlockData->DefaultValueEntry);
//
// Add Block Data into VarStorageData BlockEntry
//
InsertBlockData (&VarStorageData->BlockEntry, &BlockData);
//
// Add default value by CheckBox Flags
//
if ((IfrCheckBox->Flags & EFI_IFR_CHECKBOX_DEFAULT) == EFI_IFR_CHECKBOX_DEFAULT) {
//
// Set standard ID to Manufacture ID and Get DefaultName String ID
//
VarDefaultId = EFI_HII_DEFAULT_CLASS_STANDARD;
Status = FindDefaultName (DefaultIdArray, VarDefaultId, &VarDefaultName);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Prepare new DefaultValue
//
DefaultData = (IFR_DEFAULT_DATA *) AllocateZeroPool (sizeof (IFR_DEFAULT_DATA));
if (DefaultData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
DefaultData->DefaultId = VarDefaultId;
DefaultData->DefaultName = VarDefaultName;
DefaultData->Value = 1;
//
// Add DefaultValue into current BlockData
//
InsertDefaultValue (BlockData, DefaultData);
}
if ((IfrCheckBox->Flags & EFI_IFR_CHECKBOX_DEFAULT_MFG) == EFI_IFR_CHECKBOX_DEFAULT_MFG) {
//
// Set standard ID to Manufacture ID and Get DefaultName String ID
//
VarDefaultId = EFI_HII_DEFAULT_CLASS_MANUFACTURING;
Status = FindDefaultName (DefaultIdArray, VarDefaultId, &VarDefaultName);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Prepare new DefaultValue
//
DefaultData = (IFR_DEFAULT_DATA *) AllocateZeroPool (sizeof (IFR_DEFAULT_DATA));
if (DefaultData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
DefaultData->DefaultId = VarDefaultId;
DefaultData->DefaultName = VarDefaultName;
DefaultData->Value = 1;
//
// Add DefaultValue into current BlockData
//
InsertDefaultValue (BlockData, DefaultData);
}
break;
case EFI_IFR_STRING_OP:
//
// offset by question header
// width MaxSize * sizeof (CHAR16)
// no default value, only block array
//
//
// Check whether this question is for the requested varstore.
//
IfrString = (EFI_IFR_STRING *) IfrOpHdr;
if (IfrString->Question.VarStoreId != VarStorageData->VarStoreId) {
break;
}
//
// Get Offset/Width by Question header and OneOf Flags
//
VarOffset = IfrString->Question.VarStoreInfo.VarOffset;
VarWidth = (UINT16) (IfrString->MaxSize * sizeof (UINT16));
//
// Check whether this question is in requested block array.
//
if (!BlockArrayCheck (RequestBlockArray, VarOffset, VarWidth)) {
//
// This question is not in the requested string. Skip it.
//
break;
}
//
// Check this var question is in the var storage
//
if ((VarOffset + VarWidth) > VarStorageData->Size) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Set Block Data
//
BlockData = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
if (BlockData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
BlockData->Offset = VarOffset;
BlockData->Width = VarWidth;
BlockData->QuestionId = IfrString->Question.QuestionId;
BlockData->OpCode = IfrOpHdr->OpCode;
InitializeListHead (&BlockData->DefaultValueEntry);
//
// Add Block Data into VarStorageData BlockEntry
//
InsertBlockData (&VarStorageData->BlockEntry, &BlockData);
//
// No default value for string.
//
BlockData = NULL;
break;
case EFI_IFR_PASSWORD_OP:
//
// offset by question header
// width MaxSize * sizeof (CHAR16)
// no default value, only block array
//
//
// Check whether this question is for the requested varstore.
//
IfrPassword = (EFI_IFR_PASSWORD *) IfrOpHdr;
if (IfrPassword->Question.VarStoreId != VarStorageData->VarStoreId) {
break;
}
//
// Get Offset/Width by Question header and OneOf Flags
//
VarOffset = IfrPassword->Question.VarStoreInfo.VarOffset;
VarWidth = (UINT16) (IfrPassword->MaxSize * sizeof (UINT16));
//
// Check whether this question is in requested block array.
//
if (!BlockArrayCheck (RequestBlockArray, VarOffset, VarWidth)) {
//
// This question is not in the requested string. Skip it.
//
break;
}
//
// Check this var question is in the var storage
//
if ((VarOffset + VarWidth) > VarStorageData->Size) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Set Block Data
//
BlockData = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
if (BlockData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
BlockData->Offset = VarOffset;
BlockData->Width = VarWidth;
BlockData->QuestionId = IfrPassword->Question.QuestionId;
BlockData->OpCode = IfrOpHdr->OpCode;
InitializeListHead (&BlockData->DefaultValueEntry);
//
// Add Block Data into VarStorageData BlockEntry
//
InsertBlockData (&VarStorageData->BlockEntry, &BlockData);
//
// No default value for string.
//
BlockData = NULL;
break;
case EFI_IFR_ONE_OF_OPTION_OP:
//
// No matched block data is ignored.
//
if (BlockData == NULL || BlockData->Scope == 0) {
break;
}
IfrOneOfOption = (EFI_IFR_ONE_OF_OPTION *) IfrOpHdr;
if (BlockData->OpCode == EFI_IFR_ORDERED_LIST_OP) {
//
// Get ordered list option data type.
//
if (IfrOneOfOption->Type == EFI_IFR_TYPE_NUM_SIZE_8 || IfrOneOfOption->Type == EFI_IFR_TYPE_BOOLEAN) {
VarWidth = 1;
} else if (IfrOneOfOption->Type == EFI_IFR_TYPE_NUM_SIZE_16) {
VarWidth = 2;
} else if (IfrOneOfOption->Type == EFI_IFR_TYPE_NUM_SIZE_32) {
VarWidth = 4;
} else if (IfrOneOfOption->Type == EFI_IFR_TYPE_NUM_SIZE_64) {
VarWidth = 8;
} else {
//
// Invalid ordered list option data type.
//
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Calculate Ordered list QuestionId width.
//
BlockData->Width = (UINT16) (BlockData->Width * VarWidth);
BlockData = NULL;
break;
}
if ((IfrOneOfOption->Flags & EFI_IFR_OPTION_DEFAULT) == EFI_IFR_OPTION_DEFAULT) {
//
// Set standard ID to Manufacture ID and Get DefaultName String ID
//
VarDefaultId = EFI_HII_DEFAULT_CLASS_STANDARD;
Status = FindDefaultName (DefaultIdArray, VarDefaultId, &VarDefaultName);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Prepare new DefaultValue
//
DefaultData = (IFR_DEFAULT_DATA *) AllocateZeroPool (sizeof (IFR_DEFAULT_DATA));
if (DefaultData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
DefaultData->DefaultId = VarDefaultId;
DefaultData->DefaultName = VarDefaultName;
DefaultData->Value = IfrOneOfOption->Value.u64;
//
// Add DefaultValue into current BlockData
//
InsertDefaultValue (BlockData, DefaultData);
}
if ((IfrOneOfOption->Flags & EFI_IFR_OPTION_DEFAULT_MFG) == EFI_IFR_OPTION_DEFAULT_MFG) {
//
// Set default ID to Manufacture ID and Get DefaultName String ID
//
VarDefaultId = EFI_HII_DEFAULT_CLASS_MANUFACTURING;
Status = FindDefaultName (DefaultIdArray, VarDefaultId, &VarDefaultName);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Prepare new DefaultValue
//
DefaultData = (IFR_DEFAULT_DATA *) AllocateZeroPool (sizeof (IFR_DEFAULT_DATA));
if (DefaultData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
DefaultData->DefaultId = VarDefaultId;
DefaultData->DefaultName = VarDefaultName;
DefaultData->Value = IfrOneOfOption->Value.u64;
//
// Add DefaultValue into current BlockData
//
InsertDefaultValue (BlockData, DefaultData);
}
break;
case EFI_IFR_DEFAULT_OP:
//
// Update Current BlockData to the default value.
//
if (BlockData == NULL || BlockData->Scope == 0) {
//
// No matched block data is ignored.
//
break;
}
if (BlockData->OpCode == EFI_IFR_ORDERED_LIST_OP) {
//
// OrderedList Opcode is no default value.
//
break;
}
//
// Get the DefaultId and DefaultName String ID
//
IfrDefault = (EFI_IFR_DEFAULT *) IfrOpHdr;
VarDefaultId = IfrDefault->DefaultId;
Status = FindDefaultName (DefaultIdArray, VarDefaultId, &VarDefaultName);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Prepare new DefaultValue
//
DefaultData = (IFR_DEFAULT_DATA *) AllocateZeroPool (sizeof (IFR_DEFAULT_DATA));
if (DefaultData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
DefaultData->DefaultId = VarDefaultId;
DefaultData->DefaultName = VarDefaultName;
DefaultData->Value = IfrDefault->Value.u64;
//
// Add DefaultValue into current BlockData
//
InsertDefaultValue (BlockData, DefaultData);
break;
case EFI_IFR_END_OP:
//
// End Opcode is for Var.
//
if (BlockData != NULL && BlockData->Scope > 0) {
BlockData->Scope--;
}
break;
default:
if (BlockData != NULL && BlockData->Scope > 0) {
BlockData->Scope = (UINT8) (BlockData->Scope + IfrOpHdr->Scope);
}
break;
}
IfrOffset += IfrOpHdr->Length;
}
Done:
//
// Set the defualt ID array.
//
*PIfrDefaultIdArray = DefaultIdArray;
return Status;
}
/**
This function gets the full request string and full default value string by
parsing IFR data in HII form packages.
When Request points to NULL string, the request string and default value string
for each varstore in form package will return.
@param HiiHandle Hii Handle which Hii Packages are registered.
@param DevicePath Device Path which Hii Config Access Protocol is registered.
@param Request Pointer to a null-terminated Unicode string in
<ConfigRequest> format. When it doesn't contain
any RequestElement, it will be updated to return
the full RequestElement retrieved from IFR data.
If it points to NULL, the request string for the first
varstore in form package will be merged into a
<MultiConfigRequest> format string and return.
@param AltCfgResp Pointer to a null-terminated Unicode string in
<ConfigAltResp> format. When the pointer is to NULL,
the full default value string retrieved from IFR data
will return. When the pinter is to a string, the
full default value string retrieved from IFR data
will be merged into the input string and return.
When Request points to NULL, the default value string
for each varstore in form package will be merged into
a <MultiConfigAltResp> format string and return.
@retval EFI_SUCCESS The Results string is set to the full request string.
And AltCfgResp contains all default value string.
@retval EFI_OUT_OF_RESOURCES Not enough memory for the return string.
@retval EFI_NOT_FOUND The varstore (Guid and Name) in Request string
can't be found in Form package.
@retval EFI_NOT_FOUND HiiPackage can't be got on the input HiiHandle.
@retval EFI_INVALID_PARAMETER *Request points to NULL.
**/
EFI_STATUS
EFIAPI
GetFullStringFromHiiFormPackages (
IN EFI_HII_HANDLE HiiHandle,
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
IN OUT EFI_STRING *Request,
IN OUT EFI_STRING *AltCfgResp
)
{
EFI_STATUS Status;
EFI_HII_PACKAGE_LIST_HEADER *HiiPackageList;
UINT32 PackageListLength;
UINTN BufferSize;
IFR_BLOCK_DATA *RequestBlockArray;
IFR_BLOCK_DATA *BlockData;
IFR_BLOCK_DATA *NextBlockData;
IFR_DEFAULT_DATA *DefaultValueData;
IFR_DEFAULT_DATA *DefaultId;
IFR_DEFAULT_DATA *DefaultIdArray;
EFI_HII_PACKAGE_HEADER PacakgeHeader;
UINT32 PackageOffset;
IFR_VARSTORAGE_DATA *VarStorageData;
EFI_STRING DefaultAltCfgResp;
EFI_STRING FullConfigRequest;
EFI_STRING ConfigHdr;
EFI_STRING GuidStr;
EFI_STRING NameStr;
EFI_STRING PathStr;
EFI_STRING StringPtr;
UINTN Length;
UINT8 *TmpBuffer;
UINT16 Offset;
UINT16 Width;
LIST_ENTRY *Link;
LIST_ENTRY *LinkData;
LIST_ENTRY *LinkDefault;
//
// Initialize the local variables.
//
RequestBlockArray = NULL;
VarStorageData = NULL;
DefaultAltCfgResp = NULL;
FullConfigRequest = NULL;
ConfigHdr = NULL;
DefaultIdArray = NULL;
GuidStr = NULL;
NameStr = NULL;
PathStr = NULL;
//
// 1. Get HiiPackage by HiiHandle
//
BufferSize = 0;
HiiPackageList = NULL;
Status = HiiExportPackageLists (&mPrivate.HiiDatabase, HiiHandle, &BufferSize, HiiPackageList);
//
// The return status should always be EFI_BUFFER_TOO_SMALL as input buffer's size is 0.
//
if (Status != EFI_BUFFER_TOO_SMALL) {
return Status;
}
HiiPackageList = AllocatePool (BufferSize);
if (HiiPackageList == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Get PackageList on HiiHandle
//
Status = HiiExportPackageLists (&mPrivate.HiiDatabase, HiiHandle, &BufferSize, HiiPackageList);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// 2. Parse FormPackage to get BlockArray and DefaultId Array for the request BlockArray.
// 1) Request is NULL.
// 2) Request is not NULL. And it doesn't contain any BlockArray.
// 3) Request is not NULL. And it containts BlockArray.
//
//
// Initialize VarStorageData to store the var store Block and Default value information.
//
VarStorageData = (IFR_VARSTORAGE_DATA *) AllocateZeroPool (sizeof (IFR_VARSTORAGE_DATA));
if (VarStorageData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
InitializeListHead (&VarStorageData->Entry);
InitializeListHead (&VarStorageData->BlockEntry);
//
// Gte the request block array by Request String
//
StringPtr = NULL;
if (*Request != NULL) {
StringPtr = StrStr (*Request, L"&OFFSET=");
}
if (StringPtr != NULL) {
//
// Init RequestBlockArray
//
RequestBlockArray = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
if (RequestBlockArray == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
InitializeListHead (&RequestBlockArray->Entry);
//
// Get the request Block array from the request string
// Offset and Width
//
//
// 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) {
//
// Skip the OFFSET string
//
StringPtr += StrLen (L"&OFFSET=");
//
// Get Offset
//
Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
if (EFI_ERROR (Status)) {
goto Done;
}
Offset = 0;
CopyMem (
&Offset,
TmpBuffer,
(((Length + 1) / 2) < sizeof (UINT16)) ? ((Length + 1) / 2) : sizeof (UINT16)
);
FreePool (TmpBuffer);
StringPtr += Length;
if (StrnCmp (StringPtr, L"&WIDTH=", StrLen (L"&WIDTH=")) != 0) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
StringPtr += StrLen (L"&WIDTH=");
//
// Get Width
//
Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
if (EFI_ERROR (Status)) {
goto Done;
}
Width = 0;
CopyMem (
&Width,
TmpBuffer,
(((Length + 1) / 2) < sizeof (UINT16)) ? ((Length + 1) / 2) : sizeof (UINT16)
);
FreePool (TmpBuffer);
StringPtr += Length;
if (*StringPtr != 0 && *StringPtr != L'&') {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Set Block Data
//
BlockData = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
if (BlockData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
BlockData->Offset = Offset;
BlockData->Width = Width;
InsertBlockData (&RequestBlockArray->Entry, &BlockData);
//
// If '\0', parsing is finished.
//
if (*StringPtr == 0) {
break;
}
}
//
// Merge the requested block data.
//
Link = RequestBlockArray->Entry.ForwardLink;
while ((Link != &RequestBlockArray->Entry) && (Link->ForwardLink != &RequestBlockArray->Entry)) {
BlockData = BASE_CR (Link, IFR_BLOCK_DATA, Entry);
NextBlockData = BASE_CR (Link->ForwardLink, IFR_BLOCK_DATA, Entry);
if ((NextBlockData->Offset >= BlockData->Offset) && (NextBlockData->Offset <= (BlockData->Offset + BlockData->Width))) {
if ((NextBlockData->Offset + NextBlockData->Width) > (BlockData->Offset + BlockData->Width)) {
BlockData->Width = (UINT16) (NextBlockData->Offset + NextBlockData->Width - BlockData->Offset);
}
RemoveEntryList (Link->ForwardLink);
FreePool (NextBlockData);
continue;
}
Link = Link->ForwardLink;
}
}
//
// Get the form package
//
PackageOffset = sizeof (EFI_HII_PACKAGE_LIST_HEADER);
PackageListLength = ReadUnaligned32 (&HiiPackageList->PackageLength);
while (PackageOffset < PackageListLength) {
CopyMem (&PacakgeHeader, (UINT8 *) HiiPackageList + PackageOffset, sizeof (PacakgeHeader));
if (PacakgeHeader.Type == EFI_HII_PACKAGE_FORMS) {
//
// Reset VarStorageData
//
VarStorageData->Size = 0;
VarStorageData->VarStoreId = 0;
if (VarStorageData->Name != NULL) {
FreePool (VarStorageData->Name);
VarStorageData->Name = NULL;
}
//
// Parse the opcode in form package
//
Status = ParseIfrData ((UINT8 *) HiiPackageList + PackageOffset, PacakgeHeader.Length, *Request, RequestBlockArray, VarStorageData, &DefaultIdArray);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Only one form is in a pacakge list.
//
break;
}
PackageOffset += PacakgeHeader.Length;
}
//
// No requested varstore in IFR data and directly return
//
if (VarStorageData->Size == 0) {
goto Done;
}
//
// 3. Construct Request Element (Block Name) for 2.1 and 2.2 case.
//
//
// Construct <ConfigHdr> : "GUID=...&NAME=...&PATH=..." by VarStorageData Guid, Name and DriverHandle
//
GenerateSubStr (L"GUID=", sizeof (EFI_GUID), (VOID *) &VarStorageData->Guid, 1, &GuidStr);
GenerateSubStr (L"NAME=", StrLen (VarStorageData->Name) * sizeof (CHAR16), (VOID *) VarStorageData->Name, 2, &NameStr);
GenerateSubStr (
L"PATH=",
GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *) DevicePath),
(VOID *) DevicePath,
1,
&PathStr
);
Length = StrLen (GuidStr);
Length = Length + StrLen (NameStr);
Length = Length + StrLen (PathStr) + 1;
ConfigHdr = AllocateZeroPool (Length * sizeof (CHAR16));
if (ConfigHdr == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
StrCpy (ConfigHdr, GuidStr);
StrCat (ConfigHdr, NameStr);
StrCat (ConfigHdr, PathStr);
//
// Remove the last character L'&'
//
*(ConfigHdr + StrLen (ConfigHdr) - 1) = L'\0';
if (RequestBlockArray == NULL) {
//
// Append VarStorageData BlockEntry into *Request string
// Now support only one varstore in a form package.
//
//
// Go through all VarStorageData Entry and get BlockEntry for each one for the multiple varstore in a single form package
// Then construct them all to return MultiRequest string : ConfigHdr BlockConfig
//
//
// Compute the length of the entire request starting with <ConfigHdr> and a
// Null-terminator
//
Length = StrLen (ConfigHdr) + 1;
for (Link = VarStorageData->BlockEntry.ForwardLink; Link != &VarStorageData->BlockEntry; Link = Link->ForwardLink) {
//
// Add <BlockName> length for each Offset/Width pair
//
// <BlockName> ::= &OFFSET=1234&WIDTH=1234
// | 8 | 4 | 7 | 4 |
//
Length = Length + (8 + 4 + 7 + 4);
}
//
// Allocate buffer for the entire <ConfigRequest>
//
FullConfigRequest = AllocateZeroPool (Length * sizeof (CHAR16));
if (FullConfigRequest == NULL) {
goto Done;
}
StringPtr = FullConfigRequest;
//
// Start with <ConfigHdr>
//
StrCpy (StringPtr, ConfigHdr);
StringPtr += StrLen (StringPtr);
//
// Loop through all the Offset/Width pairs and append them to ConfigRequest
//
for (Link = VarStorageData->BlockEntry.ForwardLink; Link != &VarStorageData->BlockEntry; Link = Link->ForwardLink) {
BlockData = BASE_CR (Link, IFR_BLOCK_DATA, Entry);
//
// Append &OFFSET=XXXX&WIDTH=YYYY\0
//
UnicodeSPrint (
StringPtr,
(8 + 4 + 7 + 4 + 1) * sizeof (CHAR16),
L"&OFFSET=%04X&WIDTH=%04X",
BlockData->Offset,
BlockData->Width
);
StringPtr += StrLen (StringPtr);
}
//
// Set to the got full request string.
//
HiiToLower (FullConfigRequest);
if (*Request != NULL) {
FreePool (*Request);
}
*Request = FullConfigRequest;
}
//
// 4. Construct Default Value string in AltResp according to request element.
// Go through all VarStorageData Entry and get the DefaultId array for each one
// Then construct them all to : ConfigHdr AltConfigHdr ConfigBody AltConfigHdr ConfigBody
//
//
// Add length for <ConfigHdr> + '\0'
//
Length = StrLen (ConfigHdr) + 1;
for (Link = DefaultIdArray->Entry.ForwardLink; Link != &DefaultIdArray->Entry; Link = Link->ForwardLink) {
DefaultId = BASE_CR (Link, IFR_DEFAULT_DATA, Entry);
//
// Add length for "&<ConfigHdr>&ALTCFG=XXXX"
// |1| StrLen (ConfigHdr) | 8 | 4 |
//
Length += (1 + StrLen (ConfigHdr) + 8 + 4);
for (LinkData = VarStorageData->BlockEntry.ForwardLink; LinkData != &VarStorageData->BlockEntry; LinkData = LinkData->ForwardLink) {
BlockData = BASE_CR (LinkData, IFR_BLOCK_DATA, Entry);
for (LinkDefault = BlockData->DefaultValueEntry.ForwardLink; LinkDefault != &BlockData->DefaultValueEntry; LinkDefault = LinkDefault->ForwardLink) {
DefaultValueData = BASE_CR (LinkDefault, IFR_DEFAULT_DATA, Entry);
if (DefaultValueData->DefaultId == DefaultId->DefaultId) {
//
// Add length for "&OFFSET=XXXX&WIDTH=YYYY&VALUE=zzzzzzzzzzzz"
// | 8 | 4 | 7 | 4 | 7 | Width * 2 |
//
Length += (8 + 4 + 7 + 4 + 7 + BlockData->Width * 2);
}
}
}
}
//
// Allocate buffer for the entire <DefaultAltCfgResp>
//
DefaultAltCfgResp = AllocateZeroPool (Length * sizeof (CHAR16));
if (DefaultAltCfgResp == NULL) {
goto Done;
}
StringPtr = DefaultAltCfgResp;
//
// Start with <ConfigHdr>
//
StrCpy (StringPtr, ConfigHdr);
StringPtr += StrLen (StringPtr);
for (Link = DefaultIdArray->Entry.ForwardLink; Link != &DefaultIdArray->Entry; Link = Link->ForwardLink) {
DefaultId = BASE_CR (Link, IFR_DEFAULT_DATA, Entry);
//
// Add <AltConfigHdr> of the form "&<ConfigHdr>&ALTCFG=XXXX\0"
// |1| StrLen (ConfigHdr) | 8 | 4 |
//
UnicodeSPrint (
StringPtr,
(1 + StrLen (ConfigHdr) + 8 + 4 + 1) * sizeof (CHAR16),
L"&%s&ALTCFG=%04X",
ConfigHdr,
DefaultId->DefaultName
);
StringPtr += StrLen (StringPtr);
for (LinkData = VarStorageData->BlockEntry.ForwardLink; LinkData != &VarStorageData->BlockEntry; LinkData = LinkData->ForwardLink) {
BlockData = BASE_CR (LinkData, IFR_BLOCK_DATA, Entry);
for (LinkDefault = BlockData->DefaultValueEntry.ForwardLink; LinkDefault != &BlockData->DefaultValueEntry; LinkDefault = LinkDefault->ForwardLink) {
DefaultValueData = BASE_CR (LinkDefault, IFR_DEFAULT_DATA, Entry);
if (DefaultValueData->DefaultId == DefaultId->DefaultId) {
//
// Add <BlockConfig>
// <BlockConfig> ::= 'OFFSET='<Number>&'WIDTH='<Number>&'VALUE'=<Number>
//
UnicodeSPrint (
StringPtr,
(8 + 4 + 7 + 4 + 7 + 1) * sizeof (CHAR16),
L"&OFFSET=%04X&WIDTH=%04X&VALUE=",
BlockData->Offset,
BlockData->Width
);
StringPtr += StrLen (StringPtr);
//
// Convert Value to a hex string in "%x" format
// NOTE: This is in the opposite byte that GUID and PATH use
//
Width = BlockData->Width;
TmpBuffer = (UINT8 *) &(DefaultValueData->Value);
for (; Width > 0; Width--) {
StringPtr += UnicodeValueToString (StringPtr, PREFIX_ZERO | RADIX_HEX, TmpBuffer[Width - 1], 2);
}
}
}
}
}
HiiToLower (DefaultAltCfgResp);
//
// 5. Merge string into the input AltCfgResp if the iput *AltCfgResp is not NULL.
//
if (*AltCfgResp != NULL) {
Status = MergeDefaultString (AltCfgResp, DefaultAltCfgResp);
FreePool (DefaultAltCfgResp);
} else {
*AltCfgResp = DefaultAltCfgResp;
}
Done:
if (RequestBlockArray != NULL) {
//
// Free Link Array RequestBlockArray
//
while (!IsListEmpty (&RequestBlockArray->Entry)) {
BlockData = BASE_CR (RequestBlockArray->Entry.ForwardLink, IFR_BLOCK_DATA, Entry);
RemoveEntryList (&BlockData->Entry);
FreePool (BlockData);
}
FreePool (RequestBlockArray);
}
if (VarStorageData != NULL) {
//
// Free link array VarStorageData
//
while (!IsListEmpty (&VarStorageData->BlockEntry)) {
BlockData = BASE_CR (VarStorageData->BlockEntry.ForwardLink, IFR_BLOCK_DATA, Entry);
RemoveEntryList (&BlockData->Entry);
//
// Free default value link array
//
while (!IsListEmpty (&BlockData->DefaultValueEntry)) {
DefaultValueData = BASE_CR (BlockData->DefaultValueEntry.ForwardLink, IFR_DEFAULT_DATA, Entry);
RemoveEntryList (&DefaultValueData->Entry);
FreePool (DefaultValueData);
}
FreePool (BlockData);
}
FreePool (VarStorageData);
}
if (DefaultIdArray != NULL) {
//
// Free DefaultId Array
//
while (!IsListEmpty (&DefaultIdArray->Entry)) {
DefaultId = BASE_CR (DefaultIdArray->Entry.ForwardLink, IFR_DEFAULT_DATA, Entry);
RemoveEntryList (&DefaultId->Entry);
FreePool (DefaultId);
}
FreePool (DefaultIdArray);
}
//
// Free the allocated string
//
if (GuidStr != NULL) {
FreePool (GuidStr);
}
if (NameStr != NULL) {
FreePool (NameStr);
}
if (PathStr != NULL) {
FreePool (PathStr);
}
if (ConfigHdr != NULL) {
FreePool (ConfigHdr);
}
//
// Free Pacakge data
//
if (HiiPackageList != NULL) {
FreePool (HiiPackageList);
}
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_DEVICE_PATH_PROTOCOL *TempDevicePath;
EFI_STATUS Status;
LIST_ENTRY *Link;
HII_DATABASE_RECORD *Database;
UINT8 *DevicePathPkg;
UINT8 *CurrentDevicePath;
EFI_HANDLE DriverHandle;
EFI_HII_HANDLE HiiHandle;
EFI_HII_CONFIG_ACCESS_PROTOCOL *ConfigAccess;
EFI_STRING AccessProgress;
EFI_STRING AccessResults;
EFI_STRING DefaultResults;
BOOLEAN FirstElement;
UINTN DevicePathLength;
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;
DefaultResults = NULL;
ConfigRequest = NULL;
Status = EFI_SUCCESS;
AccessResults = NULL;
DevicePath = NULL;
//
// 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;
}
FirstElement = TRUE;
//
// 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) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
*(ConfigRequest + Length) = 0;
//
// Get the UEFI device path
//
Status = GetDevicePath (ConfigRequest, (UINT8 **) &DevicePath);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Find driver which matches the routing data.
//
DriverHandle = NULL;
HiiHandle = NULL;
DevicePathLength = GetDevicePathSize (DevicePath);
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 ((DevicePathLength == GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *) CurrentDevicePath)) &&
(CompareMem (
DevicePath,
CurrentDevicePath,
DevicePathLength
) == 0)) {
DriverHandle = Database->DriverHandle;
HiiHandle = Database->Handle;
break;
}
}
}
//
// Try to find driver handle by device path.
//
if (DriverHandle == NULL) {
TempDevicePath = DevicePath;
Status = gBS->LocateDevicePath (
&gEfiDevicePathProtocolGuid,
&TempDevicePath,
&DriverHandle
);
if (EFI_ERROR (Status) || (DriverHandle == NULL)) {
//
// Routing data does not match any known driver.
// Set Progress to the 'G' in "GUID" of the routing header.
//
*Progress = StringPtr;
Status = EFI_NOT_FOUND;
goto Done;
}
}
//
// Check whether ConfigRequest contains request string OFFSET/WIDTH
//
if ((HiiHandle != NULL) && (StrStr (ConfigRequest, L"&OFFSET=") == NULL)) {
//
// Get the full request string from IFR when HiiPackage is registered to HiiHandle
//
Status = GetFullStringFromHiiFormPackages (HiiHandle, DevicePath, &ConfigRequest, &DefaultResults);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Not any request block is found.
//
if (StrStr (ConfigRequest, L"&OFFSET=") == NULL) {
AccessResults = AllocateCopyPool (StrSize (ConfigRequest), ConfigRequest);
goto NextConfigString;
}
}
//
// 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.
//
*Progress = StrStr (StringPtr, AccessProgress);
goto Done;
}
//
// Attach this <ConfigAltResp> to a <MultiConfigAltResp>. There is a '&'
// which seperates the first <ConfigAltResp> and the following ones.
//
ASSERT (*AccessProgress == 0);
//
// Update AccessResults by getting default setting from IFR when HiiPackage is registered to HiiHandle
//
if (HiiHandle != NULL) {
if (DefaultResults == NULL) {
Status = GetFullStringFromHiiFormPackages (HiiHandle, DevicePath, &ConfigRequest, &AccessResults);
} else {
Status = MergeDefaultString (&AccessResults, DefaultResults);
}
}
FreePool (DevicePath);
DevicePath = NULL;
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Free the allocated memory.
//
if (DefaultResults != NULL) {
FreePool (DefaultResults);
DefaultResults = NULL;
}
NextConfigString:
if (!FirstElement) {
Status = AppendToMultiString (Results, L"&");
ASSERT_EFI_ERROR (Status);
}
Status = AppendToMultiString (Results, AccessResults);
ASSERT_EFI_ERROR (Status);
FirstElement = FALSE;
FreePool (AccessResults);
AccessResults = NULL;
FreePool (ConfigRequest);
ConfigRequest = NULL;
//
// Go to next <ConfigRequest> (skip '&').
//
StringPtr += Length;
if (*StringPtr == 0) {
*Progress = StringPtr;
break;
}
StringPtr++;
}
Done:
if (EFI_ERROR (Status)) {
FreePool (*Results);
*Results = NULL;
}
if (ConfigRequest != NULL) {
FreePool (ConfigRequest);
}
if (AccessResults != NULL) {
FreePool (AccessResults);
}
if (DefaultResults != NULL) {
FreePool (DefaultResults);
}
if (DevicePath != NULL) {
FreePool (DevicePath);
}
return Status;
}
/**
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;
EFI_HII_CONFIG_ACCESS_PROTOCOL *ConfigAccess;
EFI_STRING AccessResults;
EFI_STRING Progress;
EFI_STRING ConfigRequest;
UINTN Index;
EFI_HANDLE *ConfigAccessHandles;
UINTN NumberConfigAccessHandles;
BOOLEAN FirstElement;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_HII_HANDLE HiiHandle;
EFI_STRING DefaultResults;
HII_DATABASE_PRIVATE_DATA *Private;
LIST_ENTRY *Link;
HII_DATABASE_RECORD *Database;
UINT8 *DevicePathPkg;
UINT8 *CurrentDevicePath;
UINTN DevicePathLength;
if (This == NULL || Results == NULL) {
return EFI_INVALID_PARAMETER;
}
Private = CONFIG_ROUTING_DATABASE_PRIVATE_DATA_FROM_THIS (This);
//
// 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;
}
NumberConfigAccessHandles = 0;
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiHiiConfigAccessProtocolGuid,
NULL,
&NumberConfigAccessHandles,
&ConfigAccessHandles
);
if (EFI_ERROR (Status)) {
return Status;
}
FirstElement = TRUE;
for (Index = 0; Index < NumberConfigAccessHandles; Index++) {
Status = gBS->HandleProtocol (
ConfigAccessHandles[Index],
&gEfiHiiConfigAccessProtocolGuid,
(VOID **) &ConfigAccess
);
if (EFI_ERROR (Status)) {
continue;
}
//
// Get DevicePath and HiiHandle for this ConfigAccess driver handle
//
Progress = NULL;
HiiHandle = NULL;
ConfigRequest = NULL;
DefaultResults = NULL;
DevicePath = DevicePathFromHandle (ConfigAccessHandles[Index]);
DevicePathLength = GetDevicePathSize (DevicePath);
if (DevicePath != 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 ((DevicePathLength == GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *) CurrentDevicePath)) &&
(CompareMem (
DevicePath,
CurrentDevicePath,
DevicePathLength
) == 0)) {
HiiHandle = Database->Handle;
break;
}
}
}
}
//
// Update AccessResults by getting default setting from IFR when HiiPackage is registered to HiiHandle
//
if (HiiHandle != NULL && DevicePath != NULL) {
Status = GetFullStringFromHiiFormPackages (HiiHandle, DevicePath, &ConfigRequest, &DefaultResults);
}
//
// Can't parse IFR data to get the request string and default string.
//
if (EFI_ERROR (Status)) {
ConfigRequest = NULL;
DefaultResults = NULL;
}
Status = ConfigAccess->ExtractConfig (
ConfigAccess,
ConfigRequest,
&Progress,
&AccessResults
);
if (!EFI_ERROR (Status)) {
//
// Merge the default sting from IFR code into the got setting from driver.
//
if (DefaultResults != NULL) {
MergeDefaultString (&AccessResults, DefaultResults);
FreePool (DefaultResults);
}
//
// Attach this <ConfigAltResp> to a <MultiConfigAltResp>. There is a '&'
// which seperates the first <ConfigAltResp> and the following ones.
//
if (!FirstElement) {
Status = AppendToMultiString (Results, L"&");
ASSERT_EFI_ERROR (Status);
}
Status = AppendToMultiString (Results, AccessResults);
ASSERT_EFI_ERROR (Status);
FirstElement = FALSE;
FreePool (AccessResults);
AccessResults = NULL;
}
}
FreePool (ConfigAccessHandles);
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;
EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;
LIST_ENTRY *Link;
HII_DATABASE_RECORD *Database;
UINT8 *DevicePathPkg;
UINT8 *CurrentDevicePath;
EFI_HANDLE DriverHandle;
EFI_HII_CONFIG_ACCESS_PROTOCOL *ConfigAccess;
EFI_STRING AccessProgress;
UINTN DevicePathLength;
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)) {
FreePool (ConfigResp);
return Status;
}
//
// Find driver which matches the routing data.
//
DriverHandle = NULL;
DevicePathLength = GetDevicePathSize (DevicePath);
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 ((DevicePathLength == GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *) CurrentDevicePath)) &&
(CompareMem (
DevicePath,
CurrentDevicePath,
DevicePathLength
) == 0)) {
DriverHandle = Database->DriverHandle;
break;
}
}
}
//
// Try to find driver handle by device path.
//
if (DriverHandle == NULL) {
TempDevicePath = DevicePath;
Status = gBS->LocateDevicePath (
&gEfiDevicePathProtocolGuid,
&TempDevicePath,
&DriverHandle
);
if (EFI_ERROR (Status) || (DriverHandle == NULL)) {
//
// Routing data does not match any known driver.
// Set Progress to the 'G' in "GUID" of the routing header.
//
FreePool (DevicePath);
*Progress = StringPtr;
FreePool (ConfigResp);
return EFI_NOT_FOUND;
}
}
FreePool (DevicePath);
//
// 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.
//
*Progress = StrStr (StringPtr, AccessProgress);
FreePool (ConfigResp);
return Status;
}
FreePool (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. It is <ConfigResp> string 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 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;
UINTN Index;
UINT8 *TemBuffer;
CHAR16 *TemString;
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 - 1;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
while (*StringPtr != L'&' && *StringPtr != 0) {
StringPtr++;
}
if (*StringPtr == 0) {
*Progress = StringPtr - 1;
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)
);
FreePool (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)
);
FreePool (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;
}
TemString = ValueStr;
TemBuffer = Value + Width - 1;
for (Index = 0; Index < Width; Index ++, TemBuffer --) {
TemString += UnicodeValueToString (TemString, PREFIX_ZERO | RADIX_HEX, *TemBuffer, 2);
}
FreePool (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);
FreePool (ConfigElement);
FreePool (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;
}
HiiToLower (*Config);
*Progress = StringPtr;
return EFI_SUCCESS;
Exit:
if (*Config != NULL) {
FreePool (*Config);
*Config = NULL;
}
if (ValueStr != NULL) {
FreePool (ValueStr);
}
if (Value != NULL) {
FreePool (Value);
}
if (ConfigElement != NULL) {
FreePool (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. It can be ConfigAltResp format string.
@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 (EFI_ERROR (Status)) {
*Progress = ConfigResp;
goto Exit;
}
Offset = 0;
CopyMem (
&Offset,
TmpBuffer,
(((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)
);
FreePool (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)
);
FreePool (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 (EFI_ERROR (Status)) {
*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;
FreePool (Value);
Value = NULL;
//
// If '\0', parsing is finished. Otherwise skip '&' to continue
//
if (*StringPtr == 0) {
break;
}
StringPtr++;
}
//
// The input string is ConfigAltResp format.
//
if ((*StringPtr != 0) && (StrnCmp (StringPtr, L"&GUID=", StrLen (L"&GUID=")) != 0)) {
*Progress = StringPtr - 1;
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
*Progress = StringPtr;
return EFI_SUCCESS;
Exit:
if (Value != NULL) {
FreePool (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. It is <ConfigAltResp> 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. It is <ConfigResp> format.
@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;
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;
}
StringPtr ++;
}
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 {
//
// Skip AltIdStr and &
//
StringPtr = StringPtr + StrLen (AltIdStr);
Status = OutputConfigBody (StringPtr, &Result);
goto Exit;
}
}
}
Status = EFI_NOT_FOUND;
Exit:
*AltCfgResp = NULL;
if (!EFI_ERROR (Status) && (Result != NULL)) {
//
// Copy the <ConfigHdr> and <ConfigBody>
//
Length = HdrEnd - HdrStart + StrLen (Result) + 1;
*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;
}
}
if (GuidStr != NULL) {
FreePool (GuidStr);
}
if (NameStr != NULL) {
FreePool (NameStr);
}
if (PathStr != NULL) {
FreePool (PathStr);
}
if (AltIdStr != NULL) {
FreePool (AltIdStr);
}
if (Result != NULL) {
FreePool (Result);
}
return Status;
}
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