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108 lines
4.1 KiB
C++
108 lines
4.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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/IntrusiveList.h>
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#include <Kernel/DoubleBuffer.h>
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#include <Kernel/Net/Socket.h>
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namespace Kernel {
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class FileDescription;
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struct SocketPair {
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NonnullRefPtr<FileDescription> description1;
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NonnullRefPtr<FileDescription> description2;
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};
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class LocalSocket final : public Socket {
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public:
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static KResultOr<NonnullRefPtr<Socket>> create(int type);
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static KResultOr<SocketPair> create_connected_pair(int type);
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virtual ~LocalSocket() override;
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KResult sendfd(const FileDescription& socket_description, FileDescription& passing_description);
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KResultOr<NonnullRefPtr<FileDescription>> recvfd(const FileDescription& socket_description);
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static void for_each(Function<void(const LocalSocket&)>);
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StringView socket_path() const;
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String absolute_path(const FileDescription& description) const override;
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// ^Socket
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virtual KResult bind(Userspace<const sockaddr*>, socklen_t) override;
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virtual KResult connect(FileDescription&, Userspace<const sockaddr*>, socklen_t, ShouldBlock = ShouldBlock::Yes) override;
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virtual KResult listen(size_t) override;
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virtual void get_local_address(sockaddr*, socklen_t*) override;
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virtual void get_peer_address(sockaddr*, socklen_t*) override;
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virtual KResult attach(FileDescription&) override;
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virtual void detach(FileDescription&) override;
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virtual bool can_read(const FileDescription&, size_t) const override;
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virtual bool can_write(const FileDescription&, size_t) const override;
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virtual KResultOr<size_t> sendto(FileDescription&, const UserOrKernelBuffer&, size_t, int, Userspace<const sockaddr*>, socklen_t) override;
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virtual KResultOr<size_t> recvfrom(FileDescription&, UserOrKernelBuffer&, size_t, int flags, Userspace<sockaddr*>, Userspace<socklen_t*>, Time&) override;
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virtual KResult getsockopt(FileDescription&, int level, int option, Userspace<void*>, Userspace<socklen_t*>) override;
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virtual KResult chown(FileDescription&, uid_t, gid_t) override;
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virtual KResult chmod(FileDescription&, mode_t) override;
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private:
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explicit LocalSocket(int type);
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virtual StringView class_name() const override { return "LocalSocket"; }
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virtual bool is_local() const override { return true; }
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bool has_attached_peer(const FileDescription&) const;
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DoubleBuffer* receive_buffer_for(FileDescription&);
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DoubleBuffer* send_buffer_for(FileDescription&);
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NonnullRefPtrVector<FileDescription>& sendfd_queue_for(const FileDescription&);
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NonnullRefPtrVector<FileDescription>& recvfd_queue_for(const FileDescription&);
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void set_connect_side_role(Role connect_side_role, bool force_evaluate_block_conditions = false)
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{
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auto previous = m_connect_side_role;
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m_connect_side_role = connect_side_role;
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if (previous != m_connect_side_role || force_evaluate_block_conditions)
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evaluate_block_conditions();
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}
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// An open socket file on the filesystem.
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RefPtr<FileDescription> m_file;
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uid_t m_prebind_uid { 0 };
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gid_t m_prebind_gid { 0 };
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mode_t m_prebind_mode { 0 };
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// A single LocalSocket is shared between two file descriptions
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// on the connect side and the accept side; so we need to store
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// an additional role for the connect side and differentiate
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// between them.
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Role m_connect_side_role { Role::None };
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FileDescription* m_connect_side_fd { nullptr };
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virtual Role role(const FileDescription& description) const override
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{
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if (m_connect_side_fd == &description)
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return m_connect_side_role;
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return m_role;
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}
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bool m_bound { false };
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bool m_accept_side_fd_open { false };
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sockaddr_un m_address { 0, { 0 } };
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DoubleBuffer m_for_client;
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DoubleBuffer m_for_server;
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NonnullRefPtrVector<FileDescription> m_fds_for_client;
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NonnullRefPtrVector<FileDescription> m_fds_for_server;
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IntrusiveListNode<LocalSocket> m_list_node;
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public:
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using List = IntrusiveList<LocalSocket, RawPtr<LocalSocket>, &LocalSocket::m_list_node>;
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};
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}
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