1 files changed, 80 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/async_resolver.h b/third_party/libwebrtc/rtc_base/async_resolver.h
new file mode 100644
index 0000000000..9de4d12fed
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/async_resolver.h
@@ -0,0 +1,80 @@
+/*
+ *  Copyright 2008 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 RTC_BASE_ASYNC_RESOLVER_H_
+#define RTC_BASE_ASYNC_RESOLVER_H_
+
+#if defined(WEBRTC_POSIX)
+#include <sys/socket.h>
+#elif WEBRTC_WIN
+#include <winsock2.h>  // NOLINT
+#endif
+
+#include <vector>
+
+#include "api/sequence_checker.h"
+#include "api/task_queue/pending_task_safety_flag.h"
+#include "rtc_base/async_resolver_interface.h"
+#include "rtc_base/event.h"
+#include "rtc_base/ip_address.h"
+#include "rtc_base/socket_address.h"
+#include "rtc_base/system/no_unique_address.h"
+#include "rtc_base/system/rtc_export.h"
+#include "rtc_base/thread.h"
+#include "rtc_base/thread_annotations.h"
+
+namespace rtc {
+
+// AsyncResolver will perform async DNS resolution, signaling the result on
+// the SignalDone from AsyncResolverInterface when the operation completes.
+//
+// This class is thread-compatible, and all methods and destruction needs to
+// happen from the same rtc::Thread, except for Destroy which is allowed to
+// happen on another context provided it's not happening concurrently to another
+// public API call, and is the last access to the object.
+// TODO(bugs.webrtc.org/12598): Deprecate and remove
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wstrict-aliasing"
+class [[deprecated("Use AsyncDnsResolver")]] RTC_EXPORT AsyncResolver
+    : public AsyncResolverInterface {
+#pragma clang diagnostic pop
+ public:
+  AsyncResolver();
+  ~AsyncResolver() override;
+
+  void Start(const SocketAddress& addr) override;
+  void Start(const SocketAddress& addr, int family) override;
+  bool GetResolvedAddress(int family, SocketAddress* addr) const override;
+  int GetError() const override;
+  void Destroy(bool wait) override;
+
+  const std::vector<IPAddress>& addresses() const;
+
+ private:
+  // Fwd decl.
+  struct State;
+
+  void ResolveDone(std::vector<IPAddress> addresses, int error)
+      RTC_EXCLUSIVE_LOCKS_REQUIRED(sequence_checker_);
+  void MaybeSelfDestruct();
+
+  SocketAddress addr_ RTC_GUARDED_BY(sequence_checker_);
+  std::vector<IPAddress> addresses_ RTC_GUARDED_BY(sequence_checker_);
+  int error_ RTC_GUARDED_BY(sequence_checker_);
+  bool recursion_check_ =
+      false;  // Protects against SignalDone calling into Destroy.
+  bool destroy_called_ = false;
+  scoped_refptr<State> state_;
+  RTC_NO_UNIQUE_ADDRESS webrtc::SequenceChecker sequence_checker_;
+};
+
+}  // namespace rtc
+
+#endif  // RTC_BASE_ASYNC_RESOLVER_H_