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https://github.com/LadybirdBrowser/ladybird
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4ea4d63008
On macOS, use Mach port messaging instead of Unix domain sockets for all IPC transport. This makes the transport capable of carrying Mach port rights as message attachments, which is a prerequisite for sending IOSurface handles over the main IPC channel (currently sent via a separate out-of-band path). It also avoids the need for the FD acknowledgement protocol that TransportSocket requires, since Mach port right transfers are atomic in the kernel. Three connection establishment patterns: - Spawned helper processes (WebContent, RequestServer, etc.) use the existing MachPortServer: the child sends its task port with a reply port, and the parent responds with a pre-created port pair. - Socket-bootstrapped connections (WebDriver, BrowserProcess) exchange Mach port names over the socket, then drop the socket. - Pre-created pairs for IPC tests and in-message transport transfer. Attachment on macOS now wraps a MachPort instead of a file descriptor, converting between the two via fileport_makeport()/fileport_makefd(). The LibIPC socket transport tests are disabled on macOS since they are socket-specific.
64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/*
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* Copyright (c) 2024, Andrew Kaster <andrew@ladybird.org>
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* Copyright (c) 2025, stasoid <stasoid@yahoo.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 <AK/Queue.h>
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#include <LibCore/Socket.h>
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#include <LibIPC/Attachment.h>
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#include <LibIPC/TransportHandle.h>
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namespace IPC {
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class TransportSocketWindows {
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AK_MAKE_NONCOPYABLE(TransportSocketWindows);
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AK_MAKE_DEFAULT_MOVABLE(TransportSocketWindows);
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public:
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struct Paired {
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NonnullOwnPtr<TransportSocketWindows> local;
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TransportHandle remote_handle;
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};
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static ErrorOr<Paired> create_paired();
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static ErrorOr<NonnullOwnPtr<TransportSocketWindows>> from_socket(NonnullOwnPtr<Core::LocalSocket> socket);
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explicit TransportSocketWindows(NonnullOwnPtr<Core::LocalSocket> socket);
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void set_peer_pid(int pid);
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void set_up_read_hook(Function<void()>);
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bool is_open() const;
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void close();
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void close_after_sending_all_pending_messages();
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void wait_until_readable();
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ErrorOr<void> transfer_message(ReadonlyBytes, Vector<size_t> const& handle_offsets);
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enum class ShouldShutdown {
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No,
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Yes,
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};
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struct Message {
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Vector<u8> bytes;
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Queue<Attachment> attachments; // always empty, present to avoid OS #ifdefs in Connection.cpp
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};
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ShouldShutdown read_as_many_messages_as_possible_without_blocking(Function<void(Message&&)>&&);
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ErrorOr<TransportHandle> release_for_transfer();
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private:
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ErrorOr<void> duplicate_handles(Bytes, Vector<size_t> const& handle_offsets);
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ErrorOr<void> transfer(ReadonlyBytes);
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private:
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NonnullOwnPtr<Core::LocalSocket> m_socket;
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ByteBuffer m_unprocessed_bytes;
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int m_peer_pid = -1;
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};
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}
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