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89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
/*
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* Copyright (c) 2021, Kyle Pereira <kyle@xylepereira.me>
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* Copyright (c) 2023, Caoimhe Byrne <caoimhebyrne06@gmail.com>
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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 "ChunkHeader.h"
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#include "FileTransferOperation.h"
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#include "Message.h"
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#include "MessageHeader.h"
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#include <AK/MemoryStream.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <LibCore/File.h>
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#include <LibCore/Notifier.h>
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namespace SpiceAgent {
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// The maximum amount of data that can be contained within a message's buffer.
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// If the buffer's length is equal to this, then the next data recieved will be more data from the same buffer.
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constexpr u32 message_buffer_threshold = 2048;
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// The maximum amount of data that can be received in one file transfer message
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constexpr u32 file_transfer_buffer_threshold = 65536;
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class SpiceAgent {
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public:
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static ErrorOr<NonnullOwnPtr<SpiceAgent>> create(StringView device_path);
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SpiceAgent(NonnullOwnPtr<Core::File> spice_device, Vector<Capability> const& capabilities);
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ErrorOr<void> start();
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template<typename T>
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ErrorOr<void> send_message(T message)
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{
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// Attempt to write the message's data to a stream.
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auto message_stream = AK::AllocatingMemoryStream();
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TRY(message.write_to_stream(message_stream));
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// Create a header to be sent.
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auto message_header_stream = AK::AllocatingMemoryStream();
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auto message_header = MessageHeader(message.type(), message_stream.used_buffer_size());
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TRY(message_header_stream.write_value(message_header));
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// The length given in the chunk header is the length of the message header, and the message combined
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auto length = message_header_stream.used_buffer_size() + message_stream.used_buffer_size();
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// Currently, there are no messages from the agent which are meant for the server.
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// So, all messages sent by the agent with a port of Port::Server get dropped silently.
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auto chunk_header = ChunkHeader(ChunkHeader::Port::Client, length);
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TRY(m_spice_device->write_value(chunk_header));
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// The message's header.
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TRY(m_spice_device->write_until_depleted(TRY(message_header_stream.read_until_eof())));
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// The message content.
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TRY(m_spice_device->write_until_depleted(TRY(message_stream.read_until_eof())));
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return {};
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}
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Function<void()> on_disconnected_from_spice_server;
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private:
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NonnullOwnPtr<Core::File> m_spice_device;
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Vector<Capability> m_capabilities;
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HashMap<u32, NonnullRefPtr<FileTransferOperation>> m_file_transfer_operations;
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RefPtr<Core::Notifier> m_notifier;
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bool m_clipboard_dirty { false };
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// Fired when we receive clipboard data from the spice server.
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ErrorOr<void> did_receive_clipboard_message(ClipboardMessage& message);
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// Fired when the user's clipboard changes
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ErrorOr<void> on_clipboard_update(String const& mime_type);
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// Sends the GUI::Clipboard's current contents to the spice server
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ErrorOr<void> send_clipboard_contents(ClipboardDataType data_type);
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ErrorOr<void> on_message_received();
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ErrorOr<ByteBuffer> read_message_buffer();
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};
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}
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