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diff --git a/mDNSResponder/mDNSVxWorks/mDNSVxWorks.h b/mDNSResponder/mDNSVxWorks/mDNSVxWorks.h
new file mode 100644
index 00000000..afd41e36
--- /dev/null
+++ b/mDNSResponder/mDNSVxWorks/mDNSVxWorks.h
@@ -0,0 +1,122 @@
+/* -*- Mode: C; tab-width: 4 -*-
+ *
+ * Copyright (c) 2002-2005 Apple Computer, Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __MDNS_VXWORKS_H__
+#define __MDNS_VXWORKS_H__
+
+#include    "vxWorks.h"
+#include    "config.h"
+
+#include    "semLib.h"
+
+#include    "CommonServices.h"
+#include    "DebugServices.h"
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+// Forward Declarations
+
+typedef struct  NetworkInterfaceInfoVxWorks NetworkInterfaceInfoVxWorks;
+
+//---------------------------------------------------------------------------------------------------------------------------
+/*!	@struct		SocketSet
+
+    @abstract	Data for IPv4 and IPv6 sockets.
+ */
+
+typedef struct  SocketSet SocketSet;
+struct  SocketSet
+{
+    NetworkInterfaceInfoVxWorks *       info;
+    SocketRef sockV4;
+    SocketRef sockV6;
+};
+
+//---------------------------------------------------------------------------------------------------------------------------
+/*!	@struct		NetworkInterfaceInfoVxWorks
+
+    @abstract	Interface info for VxWorks.
+ */
+
+struct  NetworkInterfaceInfoVxWorks
+{
+    NetworkInterfaceInfo ifinfo;                    // MUST be the first element in this structure.
+    NetworkInterfaceInfoVxWorks *       next;
+    mDNSu32 exists;                                 // 1 = currently exists in getifaddrs list; 0 = doesn't.
+                                                    // 2 = exists, but McastTxRx state changed.
+    mDNSs32 lastSeen;                               // If exists == 0, last time this interface appeared in getifaddrs list.
+    mDNSu32 scopeID;                                // Interface index / IPv6 scope ID.
+    int family;                                     // Socket address family of the primary socket.
+    mDNSBool multicast;
+    SocketSet ss;
+};
+
+//---------------------------------------------------------------------------------------------------------------------------
+/*!	@struct		mDNS_PlatformSupport_struct
+
+    @abstract	Data for mDNS platform plugin.
+ */
+
+struct  mDNS_PlatformSupport_struct
+{
+    NetworkInterfaceInfoVxWorks *       interfaceList;
+    SocketSet unicastSS;
+    domainlabel userNiceLabel;
+    domainlabel userHostLabel;
+
+    SEM_ID lock;
+    SEM_ID initEvent;
+    mStatus initErr;
+    SEM_ID quitEvent;
+    int commandPipe;
+    int taskID;
+    mDNSBool quit;
+};
+
+//---------------------------------------------------------------------------------------------------------------------------
+/*!	@function	mDNSReconfigure
+
+    @abstract	Tell mDNS that the configuration has changed. Call when IP address changes, link goes up after being down, etc.
+
+    @discussion
+
+    VxWorks does not provide a generic mechanism for getting notified when network interfaces change so this routines
+    provides a way for BSP-specific code to signal mDNS that something has changed and it should re-build its interfaces.
+ */
+
+void    mDNSReconfigure( void );
+
+//---------------------------------------------------------------------------------------------------------------------------
+/*!	@function	mDNSDeferIPv4
+
+    @abstract	Tells mDNS whether to defer advertising of IPv4 interfaces.
+
+    @discussion
+
+    To workaround problems with clients getting a link-local IPv4 address before a DHCP address is acquired, this allows
+    external code to defer advertising of IPv4 addresses until a DHCP lease has been acquired (or it times out).
+ */
+
+void    mDNSDeferIPv4( mDNSBool inDefer );
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif  // __MDNS_VXWORKS_H__