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audk/NetworkPkg/HttpUtilitiesDxe/HttpUtilitiesProtocol.c

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/** @file
Implementation of EFI_HTTP_PROTOCOL protocol interfaces.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
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 "HttpUtilitiesDxe.h"
EFI_HTTP_UTILITIES_PROTOCOL mHttpUtilitiesProtocol = {
HttpUtilitiesBuild,
HttpUtilitiesParse
};
/**
Create HTTP header based on a combination of seed header, fields
to delete, and fields to append.
The Build() function is used to manage the headers portion of an
HTTP message by providing the ability to add, remove, or replace
HTTP headers.
@param[in] This Pointer to EFI_HTTP_UTILITIES_PROTOCOL instance.
@param[in] SeedMessageSize Size of the initial HTTP header. This can be zero.
@param[in] SeedMessage Initial HTTP header to be used as a base for
building a new HTTP header. If NULL,
SeedMessageSize is ignored.
@param[in] DeleteCount Number of null-terminated HTTP header field names
in DeleteList.
@param[in] DeleteList List of null-terminated HTTP header field names to
remove from SeedMessage. Only the field names are
in this list because the field values are irrelevant
to this operation.
@param[in] AppendCount Number of header fields in AppendList.
@param[in] AppendList List of HTTP headers to populate NewMessage with.
If SeedMessage is not NULL, AppendList will be
appended to the existing list from SeedMessage in
NewMessage.
@param[out] NewMessageSize Pointer to number of header fields in NewMessage.
@param[out] NewMessage Pointer to a new list of HTTP headers based on.
@retval EFI_SUCCESS Add, remove, and replace operations succeeded.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory for NewMessage.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
**/
EFI_STATUS
EFIAPI
HttpUtilitiesBuild (
IN EFI_HTTP_UTILITIES_PROTOCOL *This,
IN UINTN SeedMessageSize,
IN VOID *SeedMessage, OPTIONAL
IN UINTN DeleteCount,
IN CHAR8 *DeleteList[], OPTIONAL
IN UINTN AppendCount,
IN EFI_HTTP_HEADER *AppendList[], OPTIONAL
OUT UINTN *NewMessageSize,
OUT VOID **NewMessage
)
{
EFI_STATUS Status;
EFI_HTTP_HEADER *SeedHeaderFields;
UINTN SeedFieldCount;
UINTN Index;
EFI_HTTP_HEADER *TempHeaderFields;
UINTN TempFieldCount;
EFI_HTTP_HEADER *NewHeaderFields;
UINTN NewFieldCount;
EFI_HTTP_HEADER *HttpHeader;
UINTN StrLength;
UINT8 *NewMessagePtr;
SeedHeaderFields = NULL;
SeedFieldCount = 0;
TempHeaderFields = NULL;
TempFieldCount = 0;
NewHeaderFields = NULL;
NewFieldCount = 0;
HttpHeader = NULL;
StrLength = 0;
NewMessagePtr = NULL;
*NewMessageSize = 0;
Status = EFI_SUCCESS;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
if (SeedMessage != NULL) {
Status = This->Parse (
This,
SeedMessage,
SeedMessageSize,
&SeedHeaderFields,
&SeedFieldCount
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
}
//
// Handle DeleteList
//
if (SeedFieldCount != 0 && DeleteCount != 0) {
TempHeaderFields = AllocateZeroPool (SeedFieldCount * sizeof(EFI_HTTP_HEADER));
if (TempHeaderFields == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
for (Index = 0, TempFieldCount = 0; Index < SeedFieldCount; Index++) {
//
// Check whether each SeedHeaderFields member is in DeleteList
//
if (HttpIsValidHttpHeader( DeleteList, DeleteCount, SeedHeaderFields[Index].FieldName)) {
Status = HttpSetFieldNameAndValue (
&TempHeaderFields[TempFieldCount],
SeedHeaderFields[Index].FieldName,
SeedHeaderFields[Index].FieldValue
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
TempFieldCount++;
}
}
} else {
TempHeaderFields = SeedHeaderFields;
TempFieldCount = SeedFieldCount;
}
//
// Handle AppendList
//
NewHeaderFields = AllocateZeroPool ((TempFieldCount + AppendCount) * sizeof (EFI_HTTP_HEADER));
if (NewHeaderFields == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
for (Index = 0; Index < TempFieldCount; Index++) {
Status = HttpSetFieldNameAndValue (
&NewHeaderFields[Index],
TempHeaderFields[Index].FieldName,
TempHeaderFields[Index].FieldValue
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
}
NewFieldCount = TempFieldCount;
for (Index = 0; Index < AppendCount; Index++) {
HttpHeader = HttpFindHeader (NewFieldCount, NewHeaderFields, AppendList[Index]->FieldName);
if (HttpHeader != NULL) {
Status = HttpSetFieldNameAndValue (
HttpHeader,
AppendList[Index]->FieldName,
AppendList[Index]->FieldValue
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
} else {
Status = HttpSetFieldNameAndValue (
&NewHeaderFields[NewFieldCount],
AppendList[Index]->FieldName,
AppendList[Index]->FieldValue
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
NewFieldCount++;
}
}
//
// Calculate NewMessageSize, then build NewMessage
//
for (Index = 0; Index < NewFieldCount; Index++) {
HttpHeader = &NewHeaderFields[Index];
StrLength = AsciiStrLen (HttpHeader->FieldName);
*NewMessageSize += StrLength;
StrLength = sizeof(": ") - 1;
*NewMessageSize += StrLength;
StrLength = AsciiStrLen (HttpHeader->FieldValue);
*NewMessageSize += StrLength;
StrLength = sizeof("\r\n") - 1;
*NewMessageSize += StrLength;
}
StrLength = sizeof("\r\n") - 1;
*NewMessageSize += StrLength;
*NewMessage = AllocateZeroPool (*NewMessageSize);
if (*NewMessage == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
NewMessagePtr = (UINT8 *)(*NewMessage);
for (Index = 0; Index < NewFieldCount; Index++) {
HttpHeader = &NewHeaderFields[Index];
StrLength = AsciiStrLen (HttpHeader->FieldName);
CopyMem (NewMessagePtr, HttpHeader->FieldName, StrLength);
NewMessagePtr += StrLength;
StrLength = sizeof(": ") - 1;
CopyMem (NewMessagePtr, ": ", StrLength);
NewMessagePtr += StrLength;
StrLength = AsciiStrLen (HttpHeader->FieldValue);
CopyMem (NewMessagePtr, HttpHeader->FieldValue, StrLength);
NewMessagePtr += StrLength;
StrLength = sizeof("\r\n") - 1;
CopyMem (NewMessagePtr, "\r\n", StrLength);
NewMessagePtr += StrLength;
}
StrLength = sizeof("\r\n") - 1;
CopyMem (NewMessagePtr, "\r\n", StrLength);
NewMessagePtr += StrLength;
ASSERT (*NewMessageSize == (UINTN)NewMessagePtr - (UINTN)(*NewMessage));
//
// Free allocated buffer
//
ON_EXIT:
if (SeedHeaderFields != NULL) {
HttpFreeHeaderFields(SeedHeaderFields, SeedFieldCount);
}
if (TempHeaderFields != NULL) {
HttpFreeHeaderFields(TempHeaderFields, TempFieldCount);
}
if (NewHeaderFields != NULL) {
HttpFreeHeaderFields(NewHeaderFields, NewFieldCount);
}
return Status;
}
/**
Parses HTTP header and produces an array of key/value pairs.
The Parse() function is used to transform data stored in HttpHeader
into a list of fields paired with their corresponding values.
@param[in] This Pointer to EFI_HTTP_UTILITIES_PROTOCOL instance.
@param[in] HttpMessage Contains raw unformatted HTTP header string.
@param[in] HttpMessageSize Size of HTTP header.
@param[out] HeaderFields Array of key/value header pairs.
@param[out] FieldCount Number of headers in HeaderFields.
@retval EFI_SUCCESS Allocation succeeded.
@retval EFI_NOT_STARTED This EFI HTTP Protocol instance has not been
initialized.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL.
HttpMessage is NULL.
HeaderFields is NULL.
FieldCount is NULL.
**/
EFI_STATUS
EFIAPI
HttpUtilitiesParse (
IN EFI_HTTP_UTILITIES_PROTOCOL *This,
IN CHAR8 *HttpMessage,
IN UINTN HttpMessageSize,
OUT EFI_HTTP_HEADER **HeaderFields,
OUT UINTN *FieldCount
)
{
EFI_STATUS Status;
CHAR8 *TempHttpMessage;
CHAR8 *Token;
CHAR8 *NextToken;
CHAR8 *FieldName;
CHAR8 *FieldValue;
UINTN Index;
Status = EFI_SUCCESS;
TempHttpMessage = NULL;
Token = NULL;
NextToken = NULL;
FieldName = NULL;
FieldValue = NULL;
Index = 0;
if (This == NULL || HttpMessage == NULL || HeaderFields == NULL || FieldCount == NULL) {
return EFI_INVALID_PARAMETER;
}
TempHttpMessage = AllocateZeroPool (HttpMessageSize);
if (TempHttpMessage == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (TempHttpMessage, HttpMessage, HttpMessageSize);
//
// Get header number
//
*FieldCount = 0;
Token = TempHttpMessage;
while (TRUE) {
FieldName = NULL;
FieldValue = NULL;
NextToken = HttpGetFieldNameAndValue (Token, &FieldName, &FieldValue);
Token = NextToken;
if (FieldName == NULL || FieldValue == NULL) {
break;
}
(*FieldCount)++;
}
if (*FieldCount == 0) {
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
//
// Allocate buffer for header
//
*HeaderFields = AllocateZeroPool ((*FieldCount) * sizeof(EFI_HTTP_HEADER));
if (*HeaderFields == NULL) {
*FieldCount = 0;
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
CopyMem (TempHttpMessage, HttpMessage, HttpMessageSize);
//
// Set Field and Value to each header
//
Token = TempHttpMessage;
while (Index < *FieldCount) {
FieldName = NULL;
FieldValue = NULL;
NextToken = HttpGetFieldNameAndValue (Token, &FieldName, &FieldValue);
Token = NextToken;
if (FieldName == NULL || FieldValue == NULL) {
break;
}
Status = HttpSetFieldNameAndValue (&(*HeaderFields)[Index], FieldName, FieldValue);
if (EFI_ERROR (Status)) {
*FieldCount = 0;
HttpFreeHeaderFields (*HeaderFields, Index);
goto ON_EXIT;
}
Index++;
}
//
// Free allocated buffer
//
ON_EXIT:
if (TempHttpMessage != NULL) {
FreePool (TempHttpMessage);
}
return Status;
}
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