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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef IPC_HANDLE_ATTACHMENT_WIN_H_
#define IPC_HANDLE_ATTACHMENT_WIN_H_
#include <stdint.h>
#include "base/process/process_handle.h"
#include "ipc/brokerable_attachment.h"
#include "ipc/handle_win.h"
#include "ipc/ipc_export.h"
namespace IPC {
namespace internal {
// This class represents a Windows HANDLE attached to a Chrome IPC message.
class IPC_EXPORT HandleAttachmentWin : public BrokerableAttachment {
public:
// The wire format for this handle.
struct IPC_EXPORT WireFormat {
// The HANDLE that is intended for duplication, or the HANDLE that has been
// duplicated, depending on context.
// The type is int32_t instead of HANDLE because HANDLE gets typedefed to
// void*, whose size varies between 32 and 64-bit processes. Using a
// int32_t means that 64-bit processes will need to perform both up-casting
// and down-casting. This is performed using the appropriate Windows apis.
// A value of 0 is equivalent to an invalid handle.
int32_t handle;
// The id of the destination process that the handle is duplicated into.
base::ProcessId destination_process;
// The permissions to use when duplicating the handle.
HandleWin::Permissions permissions;
AttachmentId attachment_id;
};
HandleAttachmentWin(const HANDLE& handle, HandleWin::Permissions permissions);
explicit HandleAttachmentWin(const WireFormat& wire_format);
explicit HandleAttachmentWin(const BrokerableAttachment::AttachmentId& id);
BrokerableType GetBrokerableType() const override;
void PopulateWithAttachment(const BrokerableAttachment* attachment) override;
// Returns the wire format of this attachment.
WireFormat GetWireFormat(const base::ProcessId& destination) const;
HANDLE get_handle() const { return handle_; }
private:
~HandleAttachmentWin() override;
HANDLE handle_;
HandleWin::Permissions permissions_;
};
} // namespace internal
} // namespace IPC
#endif // IPC_HANDLE_ATTACHMENT_WIN_H_
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