mirror of
https://github.com/SerenityOS/serenity
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42435ce5e4
Instead of temporary changing the open file description's "blocking" flag while doing a non-waiting recvfrom, we instead plumb the currently wanted blocking behavior all the way through to the underlying socket.
113 lines
4.7 KiB
C++
113 lines
4.7 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 OpenFileDescription;
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struct SocketPair {
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NonnullLockRefPtr<OpenFileDescription> description0;
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NonnullLockRefPtr<OpenFileDescription> description1;
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};
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class LocalSocket final : public Socket {
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public:
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static ErrorOr<NonnullLockRefPtr<LocalSocket>> try_create(int type);
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static ErrorOr<SocketPair> try_create_connected_pair(int type);
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virtual ~LocalSocket() override;
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ErrorOr<void> sendfd(OpenFileDescription const& socket_description, NonnullLockRefPtr<OpenFileDescription> passing_description);
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ErrorOr<NonnullLockRefPtr<OpenFileDescription>> recvfd(OpenFileDescription const& socket_description);
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static void for_each(Function<void(LocalSocket const&)>);
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static ErrorOr<void> try_for_each(Function<ErrorOr<void>(LocalSocket const&)>);
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StringView socket_path() const;
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ErrorOr<NonnullOwnPtr<KString>> pseudo_path(OpenFileDescription const& description) const override;
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// ^Socket
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virtual ErrorOr<void> bind(Credentials const&, Userspace<sockaddr const*>, socklen_t) override;
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virtual ErrorOr<void> connect(Credentials const&, OpenFileDescription&, Userspace<sockaddr const*>, socklen_t) override;
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virtual ErrorOr<void> 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 ErrorOr<void> attach(OpenFileDescription&) override;
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virtual void detach(OpenFileDescription&) override;
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virtual bool can_read(OpenFileDescription const&, u64) const override;
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virtual bool can_write(OpenFileDescription const&, u64) const override;
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virtual ErrorOr<size_t> sendto(OpenFileDescription&, UserOrKernelBuffer const&, size_t, int, Userspace<sockaddr const*>, socklen_t) override;
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virtual ErrorOr<size_t> recvfrom(OpenFileDescription&, UserOrKernelBuffer&, size_t, int flags, Userspace<sockaddr*>, Userspace<socklen_t*>, Time&, bool blocking) override;
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virtual ErrorOr<void> getsockopt(OpenFileDescription&, int level, int option, Userspace<void*>, Userspace<socklen_t*>) override;
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virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
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virtual ErrorOr<void> chown(Credentials const&, OpenFileDescription&, UserID, GroupID) override;
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virtual ErrorOr<void> chmod(Credentials const&, OpenFileDescription&, mode_t) override;
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private:
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explicit LocalSocket(int type, NonnullOwnPtr<DoubleBuffer> client_buffer, NonnullOwnPtr<DoubleBuffer> server_buffer);
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virtual StringView class_name() const override { return "LocalSocket"sv; }
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virtual bool is_local() const override { return true; }
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bool has_attached_peer(OpenFileDescription const&) const;
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DoubleBuffer* receive_buffer_for(OpenFileDescription&);
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DoubleBuffer* send_buffer_for(OpenFileDescription&);
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NonnullLockRefPtrVector<OpenFileDescription>& sendfd_queue_for(OpenFileDescription const&);
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NonnullLockRefPtrVector<OpenFileDescription>& recvfd_queue_for(OpenFileDescription const&);
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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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ErrorOr<void> try_set_path(StringView);
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// The inode this socket is bound to.
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LockWeakPtr<Inode> m_inode;
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UserID m_prebind_uid { 0 };
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GroupID 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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OpenFileDescription* m_connect_side_fd { nullptr };
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virtual Role role(OpenFileDescription const& 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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OwnPtr<KString> m_path;
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NonnullOwnPtr<DoubleBuffer> m_for_client;
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NonnullOwnPtr<DoubleBuffer> m_for_server;
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NonnullLockRefPtrVector<OpenFileDescription> m_fds_for_client;
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NonnullLockRefPtrVector<OpenFileDescription> 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::m_list_node>;
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};
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}
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