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109 lines
4.3 KiB
C++
109 lines
4.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/InlineLinkedList.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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class LocalSocket final : public Socket
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, public InlineLinkedListNode<LocalSocket> {
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friend class InlineLinkedListNode<LocalSocket>;
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public:
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static KResultOr<NonnullRefPtr<Socket>> create(int type);
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virtual ~LocalSocket() override;
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static void for_each(Function<void(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(const sockaddr*, socklen_t) override;
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virtual KResult connect(FileDescription&, 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 void attach(FileDescription&) override;
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virtual void detach(FileDescription&) override;
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virtual bool can_read(const FileDescription&) const override;
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virtual bool can_write(const FileDescription&) const override;
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virtual ssize_t sendto(FileDescription&, const void*, size_t, int, const sockaddr*, socklen_t) override;
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virtual ssize_t recvfrom(FileDescription&, void*, size_t, int flags, sockaddr*, socklen_t*) override;
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virtual KResult getsockopt(FileDescription&, int level, int option, void*, socklen_t*) override;
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virtual KResult chown(uid_t, gid_t) override;
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virtual KResult chmod(mode_t) override;
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private:
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explicit LocalSocket(int type);
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virtual const char* 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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static Lockable<InlineLinkedList<LocalSocket>>& all_sockets();
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DoubleBuffer& receive_buffer_for(FileDescription&);
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DoubleBuffer& send_buffer_for(FileDescription&);
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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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// for InlineLinkedList
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LocalSocket* m_prev { nullptr };
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LocalSocket* m_next { nullptr };
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};
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}
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