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diff --git a/webrtc/base/ifaddrs_converter.h b/webrtc/base/ifaddrs_converter.h
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+++ b/webrtc/base/ifaddrs_converter.h
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+/*
+ *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_BASE_IFADDRS_CONVERTER_H_
+#define WEBRTC_BASE_IFADDRS_CONVERTER_H_
+
+#if defined(WEBRTC_ANDROID)
+#include "webrtc/base/ifaddrs-android.h"
+#else
+#include <ifaddrs.h>
+#endif  // WEBRTC_ANDROID
+
+#include "webrtc/base/ipaddress.h"
+
+namespace rtc {
+
+// This class converts native interface addresses to our internal IPAddress
+// class. Subclasses should override ConvertNativeToIPAttributes to implement
+// the different ways of retrieving IPv6 attributes for various POSIX platforms.
+class IfAddrsConverter {
+ public:
+  IfAddrsConverter();
+  virtual ~IfAddrsConverter();
+  virtual bool ConvertIfAddrsToIPAddress(const struct ifaddrs* interface,
+                                         InterfaceAddress* ipaddress,
+                                         IPAddress* mask);
+
+ protected:
+  virtual bool ConvertNativeAttributesToIPAttributes(
+      const struct ifaddrs* interface,
+      int* ip_attributes);
+};
+
+IfAddrsConverter* CreateIfAddrsConverter();
+
+}  // namespace rtc
+
+#endif  // WEBRTC_BASE_IFADDRS_CONVERTER_H_