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https://github.com/LadybirdBrowser/ladybird.git
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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.
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/*
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* Copyright (c) 2026, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCore/Socket.h>
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#include <LibIPC/Attachment.h>
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#include <LibIPC/Decoder.h>
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#include <LibIPC/Encoder.h>
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#include <LibIPC/Transport.h>
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#include <LibIPC/TransportHandle.h>
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namespace IPC {
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#if defined(AK_OS_MACOS)
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TransportHandle::TransportHandle(Core::MachPort receive_right, Core::MachPort send_right)
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: m_receive_right(move(receive_right))
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, m_send_right(move(send_right))
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{
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VERIFY(MACH_PORT_VALID(m_receive_right.port()));
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VERIFY(MACH_PORT_VALID(m_send_right.port()));
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}
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ErrorOr<NonnullOwnPtr<Transport>> TransportHandle::create_transport() const
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{
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VERIFY(MACH_PORT_VALID(m_receive_right.port()));
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VERIFY(MACH_PORT_VALID(m_send_right.port()));
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return make<Transport>(move(m_receive_right), move(m_send_right));
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}
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template<>
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ErrorOr<void> encode(Encoder& encoder, TransportHandle const& handle)
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{
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VERIFY(MACH_PORT_VALID(handle.m_receive_right.port()));
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VERIFY(MACH_PORT_VALID(handle.m_send_right.port()));
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TRY(encoder.append_attachment(Attachment::from_mach_port(move(handle.m_receive_right), Core::MachPort::MessageRight::MoveReceive)));
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TRY(encoder.append_attachment(Attachment::from_mach_port(move(handle.m_send_right), Core::MachPort::MessageRight::MoveSend)));
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return {};
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}
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template<>
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ErrorOr<TransportHandle> decode(Decoder& decoder)
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{
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auto& attachments = decoder.attachments();
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VERIFY(attachments.size() >= 2);
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auto recv_attachment = attachments.dequeue();
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auto send_attachment = attachments.dequeue();
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VERIFY(recv_attachment.message_right() == Core::MachPort::MessageRight::MoveReceive);
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VERIFY(send_attachment.message_right() == Core::MachPort::MessageRight::MoveSend);
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auto receive_right = recv_attachment.release_mach_port();
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auto send_right = send_attachment.release_mach_port();
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return TransportHandle { move(receive_right), move(send_right) };
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}
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#else
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TransportHandle::TransportHandle(File file)
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: m_file(move(file))
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{
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}
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ErrorOr<NonnullOwnPtr<Transport>> TransportHandle::create_transport() const
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{
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auto socket = TRY(Core::LocalSocket::adopt_fd(m_file.take_fd()));
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TRY(socket->set_blocking(false));
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return make<Transport>(move(socket));
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}
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template<>
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ErrorOr<void> encode(Encoder& encoder, TransportHandle const& handle)
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{
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return encoder.encode(handle.m_file);
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}
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template<>
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ErrorOr<TransportHandle> decode(Decoder& decoder)
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{
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auto file = TRY(decoder.decode<File>());
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return TransportHandle { move(file) };
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}
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#endif
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}
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