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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_P2P_HOST_ADDRESS_REQUEST_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_P2P_HOST_ADDRESS_REQUEST_H_
#include <stdint.h>
#include <optional>
#include "base/functional/callback.h"
#include "base/threading/thread_checker.h"
#include "net/base/ip_address.h"
#include "third_party/blink/renderer/platform/heap/cross_thread_persistent.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include "third_party/webrtc/rtc_base/socket_address.h"
namespace blink {
class P2PSocketDispatcher;
// P2PAsyncAddressResolver performs DNS hostname resolution. It's used
// to resolve addresses of STUN and relay servers. It is created and lives on
// one of libjingle's threads.
class P2PAsyncAddressResolver
: public ThreadSafeRefCounted<P2PAsyncAddressResolver> {
public:
using DoneCallback = base::OnceCallback<void(const Vector<net::IPAddress>&)>;
P2PAsyncAddressResolver(P2PSocketDispatcher* dispatcher);
P2PAsyncAddressResolver(const P2PAsyncAddressResolver&) = delete;
P2PAsyncAddressResolver& operator=(const P2PAsyncAddressResolver&) = delete;
// Start address resolve process.
void Start(const webrtc::SocketAddress& addr,
std::optional<int> address_family,
DoneCallback done_callback);
// Clients must unregister before exiting for cleanup.
void Cancel();
private:
enum State {
kStateCreated,
kStateSent,
kStateFinished,
};
friend class P2PSocketDispatcher;
friend class ThreadSafeRefCounted<P2PAsyncAddressResolver>;
virtual ~P2PAsyncAddressResolver();
void OnResponse(const Vector<net::IPAddress>& address);
// `P2PSocketDispatcher` is owned by the main thread, and must be accessed in
// a thread-safe way. Will be reset once `Start()` is called, so it doesn't
// prevent the dispatcher from being garbage-collected.
CrossThreadPersistent<P2PSocketDispatcher> dispatcher_;
THREAD_CHECKER(thread_checker_);
// State must be accessed from delegate thread only.
State state_;
DoneCallback done_callback_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_P2P_HOST_ADDRESS_REQUEST_H_
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