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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MOJO_PROXY_NODE_PROXY_H_
#define MOJO_PROXY_NODE_PROXY_H_
#include <memory>
#include <set>
#include "base/containers/unique_ptr_adapters.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ref.h"
#include "mojo/core/scoped_ipcz_handle.h"
#include "mojo/public/cpp/system/message_pipe.h"
#include "third_party/ipcz/include/ipcz/ipcz.h"
namespace mojo_proxy {
class PortalProxy;
// A NodeProxy hosts a PortalProxy object for each proxied endpoint between a
// legacy Mojo Core node and a MojoIpcz network. As messages arrive from either
// side of these proxies, they're forwarded along; and if they contain other
// message pipes, new proxies are established for those new endpoints.
class NodeProxy {
public:
// Constructs a new NodeProxy which will call `dead_callback` once its last
// proxy is removed.
NodeProxy(const IpczAPI& ipcz, base::OnceClosure dead_callback);
~NodeProxy();
// Registers a new PortalProxy to forward messages between `portal` and
// `pipe`. The proxy is activated before this call returns.
void AddPortalProxy(mojo::core::ScopedIpczHandle portal,
mojo::ScopedMessagePipeHandle pipe);
// Removes `proxy` from this NodeProxy, effectively destroying it. Calls
// `dead_callback_` if this was our last remaining portal proxy.
void RemovePortalProxy(PortalProxy* proxy);
private:
const raw_ref<const IpczAPI> ipcz_;
base::OnceClosure dead_callback_;
std::set<std::unique_ptr<PortalProxy>, base::UniquePtrComparator>
portal_proxies_;
};
} // namespace mojo_proxy
#endif // MOJO_PROXY_NODE_PROXY_H_
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