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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef IPC_IPC_LISTENER_H_
#define IPC_IPC_LISTENER_H_
#include <stdint.h>
#include <string>
#include "base/component_export.h"
#include "build/build_config.h"
#include "mojo/public/cpp/bindings/scoped_interface_endpoint_handle.h"
namespace IPC {
class Message;
// Implemented by consumers of a Channel to receive messages.
class COMPONENT_EXPORT(IPC) Listener {
public:
// Called when a message is received. Returns true iff the message was
// handled.
virtual bool OnMessageReceived(const Message& message) = 0;
// Called when the channel is connected and we have received the internal
// Hello message from the peer.
virtual void OnChannelConnected(int32_t peer_pid) {}
// Called when an error is detected that causes the channel to close.
// This method is not called when a channel is closed normally.
virtual void OnChannelError() {}
// Called when a message's deserialization failed.
virtual void OnBadMessageReceived(const Message& message) {}
// Called when an associated interface request is received on a Channel and
// the Channel has no registered handler for it.
virtual void OnAssociatedInterfaceRequest(
const std::string& interface_name,
mojo::ScopedInterfaceEndpointHandle handle) {}
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
// Called on the server side when a channel that listens for connections
// denies an attempt to connect.
virtual void OnChannelDenied() {}
// Called on the server side when a channel that listens for connections
// has an error that causes the listening channel to close.
virtual void OnChannelListenError() {}
#endif // BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
// Debugging helper for identifying what kind of a Listener this is.
// TODO(https://crbug.com/1113159): Remove this method once the bug is fixed.
virtual std::string ToDebugString();
protected:
virtual ~Listener() {}
};
} // namespace IPC
#endif // IPC_IPC_LISTENER_H_
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