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diff --git a/NetworkPkg/DnsDxe/DnsDhcp.h b/NetworkPkg/DnsDxe/DnsDhcp.h
new file mode 100644
index 0000000000..62bf7174e1
--- /dev/null
+++ b/NetworkPkg/DnsDxe/DnsDhcp.h
@@ -0,0 +1,145 @@
+/** @file
+Functions implementation related with DHCPv4/v6 for DNS driver.
+
+Copyright (c) 2015, 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
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef _DNS_DHCP_H_
+#define _DNS_DHCP_H_
+
+//
+// DHCP DNS related
+//
+#pragma pack(1)
+
+#define IP4_ETHER_PROTO       0x0800
+
+#define DHCP4_OPCODE_REQUEST         1
+#define DHCP4_MAGIC                  0x63538263 /// network byte order
+#define DHCP4_TAG_EOP                255  /// End Option
+
+#define DHCP4_TAG_TYPE               53
+#define DHCP4_MSG_REQUEST            3
+#define DHCP4_MSG_INFORM             8
+
+#define DHCP4_TAG_PARA_LIST          55
+#define DHCP4_TAG_DNS_SERVER         6
+
+
+#define DHCP6_TAG_DNS_REQUEST        6
+#define DHCP6_TAG_DNS_SERVER         23
+
+//
+// The required Dns4 server information.
+//
+typedef struct {
+  UINT32                     *ServerCount;
+  EFI_IPv4_ADDRESS           *ServerList;
+} DNS4_SERVER_INFOR;
+
+//
+// The required Dns6 server information.
+//
+typedef struct {
+  UINT32                     *ServerCount;
+  EFI_IPv6_ADDRESS           *ServerList;
+} DNS6_SERVER_INFOR;
+
+#pragma pack()
+
+/**
+  Parse the ACK to get required information
+
+  @param  Dhcp4            The DHCP4 protocol.
+  @param  Packet           Packet waiting for parse.
+  @param  DnsServerInfor   The required Dns4 server information.
+
+  @retval EFI_SUCCESS           The DNS information is got from the DHCP ACK.
+  @retval EFI_NO_MAPPING        DHCP failed to acquire address and other information.
+  @retval EFI_DEVICE_ERROR      Other errors as indicated.
+  @retval EFI_OUT_OF_RESOURCES  Failed to allocate memory.
+
+**/
+EFI_STATUS
+ParseDhcp4Ack (
+  IN EFI_DHCP4_PROTOCOL         *Dhcp4,
+  IN EFI_DHCP4_PACKET           *Packet,
+  IN DNS4_SERVER_INFOR          *DnsServerInfor
+  );
+
+/**
+  EFI_DHCP6_INFO_CALLBACK is provided by the consumer of the EFI DHCPv6 Protocol 
+  instance to intercept events that occurs in the DHCPv6 Information Request
+  exchange process.
+
+  @param  This                  Pointer to the EFI_DHCP6_PROTOCOL instance that 
+                                is used to configure this  callback function.
+  @param  Context               Pointer to the context that is initialized in
+                                the EFI_DHCP6_PROTOCOL.InfoRequest().
+  @param  Packet                Pointer to Reply packet that has been received.
+                                The EFI DHCPv6 Protocol instance is responsible
+                                for freeing the buffer.
+
+  @retval EFI_SUCCESS           The DNS information is got from the DHCP ACK.
+  @retval EFI_DEVICE_ERROR      Other errors as indicated.
+  @retval EFI_OUT_OF_RESOURCES  Failed to allocate memory.
+**/
+EFI_STATUS
+EFIAPI
+ParseDhcp6Ack (
+  IN EFI_DHCP6_PROTOCOL          *This,
+  IN VOID                        *Context,
+  IN EFI_DHCP6_PACKET            *Packet
+  );
+
+/**
+  Parse the DHCP ACK to get Dns4 server information.
+
+  @param  Instance         The DNS instance.
+  @param  DnsServerCount   Retrieved Dns4 server Ip count.
+  @param  DnsServerList    Retrieved Dns4 server Ip list.
+
+  @retval EFI_SUCCESS           The Dns4 information is got from the DHCP ACK.
+  @retval EFI_OUT_OF_RESOURCES  Failed to allocate memory.
+  @retval EFI_NO_MEDIA          There was a media error.
+  @retval Others                Other errors as indicated.
+
+**/
+EFI_STATUS
+GetDns4ServerFromDhcp4 (
+  IN  DNS_INSTANCE               *Instance,
+  OUT UINT32                     *DnsServerCount,
+  OUT EFI_IPv4_ADDRESS           **DnsServerList
+  );
+
+/**
+  Parse the DHCP ACK to get Dns6 server information.
+
+  @param  Image            The handle of the driver image.
+  @param  Controller       The handle of the controller.
+  @param  DnsServerCount   Retrieved Dns6 server Ip count.
+  @param  DnsServerList    Retrieved Dns6 server Ip list.
+
+  @retval EFI_SUCCESS           The Dns6 information is got from the DHCP ACK.
+  @retval EFI_OUT_OF_RESOURCES  Failed to allocate memory.
+  @retval EFI_NO_MEDIA          There was a media error.
+  @retval Others                Other errors as indicated.
+
+**/
+EFI_STATUS
+GetDns6ServerFromDhcp6 (
+  IN  EFI_HANDLE                 Image,
+  IN  EFI_HANDLE                 Controller,
+  OUT UINT32                     *DnsServerCount,
+  OUT EFI_IPv6_ADDRESS           **DnsServerList
+  );
+  
+#endif
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