[Patch 1/2] MdePkg/Http.h: Clarify the usage of HttpConfigData in HTTP protocol

[Jiaxin Wu <jiaxin.wu@intel.com>]

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
---
 MdePkg/Include/Protocol/Http.h | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/MdePkg/Include/Protocol/Http.h b/MdePkg/Include/Protocol/Http.h
index 297d9c3..bdcd7b1 100644
--- a/MdePkg/Include/Protocol/Http.h
+++ b/MdePkg/Include/Protocol/Http.h
@@ -303,19 +303,21 @@ typedef struct {
   The GetModeData() function is used to read the current mode data (operational
   parameters) for this HTTP protocol instance.
 
   @param[in]  This                Pointer to EFI_HTTP_PROTOCOL instance.
   @param[out] HttpConfigData      Point to buffer for operational parameters of this
-                                  HTTP instance.
+                                  HTTP instance. It is the responsibility of the caller 
+                                  to allocate the memory for HttpConfigData and 
+                                  HttpConfigData->AccessPoint.IPv6Node/IPv4Node. In fact, 
+                                  it is recommended to allocate sufficient memory to record 
+                                  IPv6Node since it is big enough for all possibilities.
 
   @retval EFI_SUCCESS             Operation succeeded.
   @retval EFI_INVALID_PARAMETER   This is NULL.
                                   HttpConfigData is NULL.
-                                  HttpInstance->LocalAddressIsIPv6 is FALSE and
-                                  HttpConfigData->IPv4Node is NULL.
-                                  HttpInstance->LocalAddressIsIPv6 is TRUE and
-                                  HttpConfigData->IPv6Node is NULL.
+                                  HttpConfigData->AccessPoint.IPv4Node or 
+                                  HttpConfigData->AccessPoint.IPv6Node is NULL.
   @retval EFI_NOT_STARTED         This EFI HTTP Protocol instance has not been started.
 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HTTP_GET_MODE_DATA)(
@@ -341,13 +343,13 @@ EFI_STATUS
 
   @retval EFI_SUCCESS             Operation succeeded.
   @retval EFI_INVALID_PARAMETER   One or more of the following conditions is TRUE:
                                   This is NULL.
                                   HttpConfigData->LocalAddressIsIPv6 is FALSE and
-                                  HttpConfigData->IPv4Node is NULL.
+                                  HttpConfigData->AccessPoint.IPv4Node is NULL.
                                   HttpConfigData->LocalAddressIsIPv6 is TRUE and
-                                  HttpConfigData->IPv6Node is NULL.
+                                  HttpConfigData->AccessPoint.IPv6Node is NULL.
   @retval EFI_ALREADY_STARTED     Reinitialize this HTTP instance without calling
                                   Configure() with NULL to reset it.
   @retval EFI_DEVICE_ERROR        An unexpected system or network error occurred.
   @retval EFI_OUT_OF_RESOURCES    Could not allocate enough system resources when
                                   executing Configure().
-- 
1.9.5.msysgit.1