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https://github.com/LadybirdBrowser/ladybird
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da6b928909
Replace IPC::File / AutoCloseFileDescriptor / MessageFileType in the IPC message pipeline with a new IPC::Attachment class. This wraps a file descriptor transferred alongside IPC messages, and provides a clean extension point for platform-specific transport mechanisms (e.g., Mach ports on macOS) that will be introduced later.
73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/Vector.h>
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#include <LibIPC/Attachment.h>
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#include <LibIPC/Forward.h>
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#include <LibIPC/Transport.h>
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namespace IPC {
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class MessageBuffer {
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public:
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MessageBuffer();
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MessageBuffer(MessageDataType data, Vector<Attachment> attachments)
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: m_data(move(data))
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, m_attachments(move(attachments))
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{
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}
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ErrorOr<void> extend_data_capacity(size_t capacity);
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ErrorOr<void> append_data(u8 const* values, size_t count);
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ErrorOr<void> append_file_descriptor(int fd);
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ErrorOr<void> append_attachment(Attachment);
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ErrorOr<void> extend(MessageBuffer&& buffer);
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ErrorOr<void> transfer_message(Transport& transport);
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MessageDataType const& data() const { return m_data; }
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MessageDataType take_data() { return move(m_data); }
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Vector<Attachment> const& attachments() const { return m_attachments; }
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Vector<Attachment> take_attachments() { return move(m_attachments); }
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private:
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MessageDataType m_data;
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Vector<Attachment> m_attachments;
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#ifdef AK_OS_WINDOWS
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Vector<size_t> m_handle_offsets;
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#endif
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};
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enum class ErrorCode : u32 {
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PeerDisconnected
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};
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template<typename Value>
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using IPCErrorOr = ErrorOr<Value, ErrorCode>;
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class Message {
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public:
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virtual ~Message() = default;
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virtual u32 endpoint_magic() const = 0;
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virtual int message_id() const = 0;
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virtual char const* message_name() const = 0;
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virtual ErrorOr<MessageBuffer> encode() const = 0;
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protected:
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Message() = default;
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};
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}
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