[Patch] NetworkPkg/Dhcp6Dxe: Handle the Nil UUID case

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

Nil UUID is a special case with all zeros value. This
patch is to handle this case to avoid the invalid DUID.

Cc: Naveen Santhapur <naveens@amiindia.co.in>
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>
---
 NetworkPkg/Dhcp6Dxe/Dhcp6Dxe.inf   | 4 +++-
 NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h    | 3 ++-
 NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c | 4 ++--
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Dxe.inf b/NetworkPkg/Dhcp6Dxe/Dhcp6Dxe.inf
index 24cb9a9..40a6ee7 100644
--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Dxe.inf
+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Dxe.inf
@@ -3,11 +3,11 @@
 #  
 #  This driver produces EFI DHCPv6 Protocol which is used to get IPv6 addresses
 #  and other configuration parameters from DHCPv6 servers.
 #
 #  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
-#  Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<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.
@@ -72,10 +72,12 @@
   gEfiUdp6ProtocolGuid                               ## TO_START
   gEfiDhcp6ServiceBindingProtocolGuid                ## BY_START
   gEfiDhcp6ProtocolGuid                              ## BY_START
   gEfiIp6ConfigProtocolGuid                          ## TO_START
 
+[Guids]  
+  gZeroGuid                   ## SOMETIMES_CONSUMES   ## GUID
  
 [Pcd]
   gEfiNetworkPkgTokenSpaceGuid.PcdDhcp6UidType       ## SOMETIMES_CONSUMES
 
 [UserExtensions.TianoCore."ExtraFiles"]
diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h b/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
index 86ef8af..06780b6 100644
--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
@@ -1,9 +1,9 @@
 /** @file
   Dhcp6 internal data structure and definition declaration.
 
-  Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<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.
@@ -35,10 +35,11 @@
 #include <Library/UefiRuntimeServicesTableLib.h>
 #include <Library/UefiLib.h>
 #include <Library/BaseLib.h>
 #include <Library/NetLib.h>
 #include <Library/PrintLib.h>
+#include <Guid/ZeroGuid.h>
 
 
 typedef struct _DHCP6_IA_CB    DHCP6_IA_CB;
 typedef struct _DHCP6_INF_CB   DHCP6_INF_CB;
 typedef struct _DHCP6_TX_CB    DHCP6_TX_CB;
diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c b/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
index 2525a32..a65ed6d 100644
--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
@@ -1,10 +1,10 @@
 /** @file
   Dhcp6 support functions implementation.
 
   (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
-  Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<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.
@@ -62,11 +62,11 @@ Dhcp6GenerateClientId (
   //
 
   //
   // If System UUID is found from SMBIOS Table, use DUID-UUID type.
   //
-  if ((PcdGet8 (PcdDhcp6UidType) == Dhcp6DuidTypeUuid) && !EFI_ERROR (NetLibGetSystemGuid (&Uuid))) {
+  if ((PcdGet8 (PcdDhcp6UidType) == Dhcp6DuidTypeUuid) && !EFI_ERROR (NetLibGetSystemGuid (&Uuid)) && !CompareGuid (&Uuid, &gZeroGuid)) {
     //
     //
     //  The format of DUID-UUID:
     //   
     //    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-- 
1.9.5.msysgit.1