[Patch] MdeModulePkg/UefiBootManagerLib: Skip the DNS device path node check.

[Patch] MdeModulePkg/UefiBootManagerLib: Skip the DNS device path node check.

[Jiaxin Wu]

After HTTP boot successfully in home mode, the HTTP device path will be
updated accordingly. So, the new device path may be appended with a DNS
device path node. When executing home mode boot again, the original HTTP
device path will mismatch with the new updated one, which will cause the
HTTP boot failure. So, we need update the current match algorithm to match
the correct FilePath. Since the DNS device path is an optional, we can skip
it check.

This patch is to fix above issue.

Cc: Ruiyu Ni <ruiyu.ni@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>
---
 MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
index d684482..6404233 100644
--- a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
+++ b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
@@ -1,9 +1,9 @@
 /** @file
   Library functions which relates with booting.
 
-Copyright (c) 2011 - 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
 (C) Copyright 2015-2016 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
@@ -1117,10 +1117,18 @@ BmMatchHttpBootDevicePath (
     if (CompareMem (Left, Right, DevicePathNodeLength (Left)) != 0) {
       if ((DevicePathType (Left) != MESSAGING_DEVICE_PATH) || (DevicePathType (Right) != MESSAGING_DEVICE_PATH)) {
         return FALSE;
       }
 
+      if (DevicePathSubType (Left) == MSG_DNS_DP) {
+        Left = NextDevicePathNode (Left);
+      }
+
+      if (DevicePathSubType (Right) == MSG_DNS_DP) {
+        Right = NextDevicePathNode (Right);
+      }
+
       if (((DevicePathSubType (Left) != MSG_IPv4_DP) || (DevicePathSubType (Right) != MSG_IPv4_DP)) &&
           ((DevicePathSubType (Left) != MSG_IPv6_DP) || (DevicePathSubType (Right) != MSG_IPv6_DP)) &&
           ((DevicePathSubType (Left) != MSG_URI_DP)  || (DevicePathSubType (Right) != MSG_URI_DP))
           ) {
         return FALSE;
-- 
1.9.5.msysgit.1

Re: [Patch] MdeModulePkg/UefiBootManagerLib: Skip the DNS device path node check.

[Ni, Ruiyu]

On 1/23/2018 3:14 PM, Jiaxin Wu wrote:
> After HTTP boot successfully in home mode, the HTTP device path will be
> updated accordingly. So, the new device path may be appended with a DNS
> device path node. When executing home mode boot again, the original HTTP
> device path will mismatch with the new updated one, which will cause the
> HTTP boot failure. So, we need update the current match algorithm to match
> the correct FilePath. Since the DNS device path is an optional, we can skip
> it check.
> 
> This patch is to fix above issue.
> 
> Cc: Ruiyu Ni <ruiyu.ni@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>
> ---
>   MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c | 10 +++++++++-
>   1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
> index d684482..6404233 100644
> --- a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
> +++ b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
> @@ -1,9 +1,9 @@
>   /** @file
>     Library functions which relates with booting.
>   
> -Copyright (c) 2011 - 2017, Intel Corporation. All rights reserved.<BR>
> +Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
>   (C) Copyright 2015-2016 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
> @@ -1117,10 +1117,18 @@ BmMatchHttpBootDevicePath (
>       if (CompareMem (Left, Right, DevicePathNodeLength (Left)) != 0) {
>         if ((DevicePathType (Left) != MESSAGING_DEVICE_PATH) || (DevicePathType (Right) != MESSAGING_DEVICE_PATH)) {
>           return FALSE;
>         }
>   
> +      if (DevicePathSubType (Left) == MSG_DNS_DP) {
> +        Left = NextDevicePathNode (Left);
> +      }
> +
> +      if (DevicePathSubType (Right) == MSG_DNS_DP) {
> +        Right = NextDevicePathNode (Right);
> +      }
> +
>         if (((DevicePathSubType (Left) != MSG_IPv4_DP) || (DevicePathSubType (Right) != MSG_IPv4_DP)) &&
>             ((DevicePathSubType (Left) != MSG_IPv6_DP) || (DevicePathSubType (Right) != MSG_IPv6_DP)) &&
>             ((DevicePathSubType (Left) != MSG_URI_DP)  || (DevicePathSubType (Right) != MSG_URI_DP))
>             ) {
>           return FALSE;
> 
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

-- 
Thanks,
Ray