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/** @file
This library provides help functions for REST EX Protocol.
(C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/NetLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/Http.h>
#include <Protocol/RestEx.h>
#define REST_EX_CONFIG_DATA_LEN_UNKNOWN 0xff
/**
This function allows the caller to create child handle for specific
REST server.
@param[in] Image The image handle used to open service.
@param[in] AccessMode Access mode of REST server.
@param[in] ConfigType Underlying configuration to communicate with REST server.
@param[in] ServiceType REST service type.
@param[out] ChildInstanceHandle The handle to receive the create child.
@retval EFI_SUCCESS Can't create the corresponding REST EX child instance.
@retval EFI_INVALID_PARAMETERS Any of input parameters is improper.
**/
EFI_STATUS
RestExLibCreateChild (
IN EFI_HANDLE Image,
IN EFI_REST_EX_SERVICE_ACCESS_MODE AccessMode,
IN EFI_REST_EX_CONFIG_TYPE ConfigType,
IN EFI_REST_EX_SERVICE_TYPE ServiceType,
OUT EFI_HANDLE *ChildInstanceHandle
)
{
EFI_STATUS Status;
UINTN NoBuffer;
EFI_HANDLE *Handle;
EFI_HANDLE ChildHandle;
EFI_REST_EX_PROTOCOL *RestEx;
EFI_REST_EX_SERVICE_INFO *RestExServiceInfo;
UINT8 LenOfConfig;
if ((Image == NULL) ||
(AccessMode >= EfiRestExServiceModeMax) ||
(ConfigType >= EfiRestExConfigTypeMax) ||
(ServiceType >= EfiRestExServiceTypeMax) ||
(ChildInstanceHandle == NULL)
)
{
return EFI_INVALID_PARAMETER;
}
*ChildInstanceHandle = NULL;
//
// Locate all REST EX binding service.
//
Handle = NULL;
NoBuffer = 0;
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiRestExServiceBindingProtocolGuid,
NULL,
&NoBuffer,
&Handle
);
if (EFI_ERROR (Status) && (Status != EFI_BUFFER_TOO_SMALL)) {
return Status;
}
Handle = (EFI_HANDLE *)AllocateZeroPool (sizeof (EFI_HANDLE) * NoBuffer);
if (Handle == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiRestExServiceBindingProtocolGuid,
NULL,
&NoBuffer,
&Handle
);
if (EFI_ERROR (Status)) {
FreePool (Handle);
return Status;
}
//
// Search for the proper REST EX instance.
//
while (NoBuffer != 0) {
ChildHandle = NULL;
Status = NetLibCreateServiceChild (
*(Handle + (NoBuffer - 1)),
Image,
&gEfiRestExServiceBindingProtocolGuid,
&ChildHandle
);
if (!EFI_ERROR (Status)) {
Status = gBS->OpenProtocol (
ChildHandle,
&gEfiRestExProtocolGuid,
(VOID **)&RestEx,
Image,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
//
// Get the information of REST service provided by this EFI REST EX driver
//
Status = RestEx->GetService (
RestEx,
&RestExServiceInfo
);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
//
// Check REST EX property.
//
switch (ConfigType) {
case EfiRestExConfigHttp:
LenOfConfig = sizeof (EFI_REST_EX_HTTP_CONFIG_DATA);
break;
case EfiRestExConfigUnspecific:
LenOfConfig = REST_EX_CONFIG_DATA_LEN_UNKNOWN;
break;
default:
goto ON_ERROR;
}
if ((RestExServiceInfo->EfiRestExServiceInfoV10.RestServiceAccessMode != AccessMode) ||
(RestExServiceInfo->EfiRestExServiceInfoV10.RestServiceType != ServiceType) ||
(RestExServiceInfo->EfiRestExServiceInfoV10.RestExConfigType != ConfigType) ||
((LenOfConfig != REST_EX_CONFIG_DATA_LEN_UNKNOWN) && (RestExServiceInfo->EfiRestExServiceInfoV10.RestExConfigDataLength != LenOfConfig)))
{
goto ON_ERROR;
}
}
//
// This is proper REST EX instance.
//
*ChildInstanceHandle = ChildHandle;
FreePool (Handle);
return EFI_SUCCESS;
ON_ERROR:;
NetLibDestroyServiceChild (
*(Handle + (NoBuffer - 1)),
Image,
&gEfiRestExServiceBindingProtocolGuid,
ChildHandle
);
NoBuffer--;
}
FreePool (Handle);
return EFI_NOT_FOUND;
}
|
