[patch] NetworkPkg: Fix issue in dns driver when building DHCP packet.

[Zhang Lubo <lubo.zhang@intel.com>]

Currently, DNS driver configure the dhcp message type to inform
when building dhcp packet to get dns info from, but it not works
with dhcp server deployed on linux system. However it works well
when changed to request type.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Zhang Lubo <lubo.zhang@intel.com>
Cc: Wu Jiaxin <jiaxin.wu@intel.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
---
 NetworkPkg/DnsDxe/DnsDhcp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/NetworkPkg/DnsDxe/DnsDhcp.c b/NetworkPkg/DnsDxe/DnsDhcp.c
index c4add70..93779be 100644
--- a/NetworkPkg/DnsDxe/DnsDhcp.c
+++ b/NetworkPkg/DnsDxe/DnsDhcp.c
@@ -1,9 +1,9 @@
 /** @file
 Functions implementation related with DHCPv4/v6 for DNS driver.
 
-Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 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
 
@@ -460,11 +460,11 @@ GetDns4ServerFromDhcp4 (
     goto ON_EXIT;
   }
   
   ParaList[0]->OpCode  = DHCP4_TAG_TYPE;
   ParaList[0]->Length  = 1;
-  ParaList[0]->Data[0] = DHCP4_MSG_INFORM;
+  ParaList[0]->Data[0] = DHCP4_MSG_REQUEST;
   
   ParaList[1] = AllocateZeroPool (sizeof (EFI_DHCP4_PACKET_OPTION));
   if (ParaList[1] == NULL) {
     Status = EFI_OUT_OF_RESOURCES;
     goto ON_EXIT;
-- 
1.9.5.msysgit.1