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d84299c7be
In order to ensure a specific owner and mode when the local socket filesystem endpoint is instantiated, we need to be able to call fchmod() and fchown() on a socket fd between socket() and bind(). This is because until we call bind(), there is no filesystem inode for the socket yet.
76 lines
2.9 KiB
C++
76 lines
2.9 KiB
C++
#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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class FileDescription;
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class LocalSocket final : public Socket, public InlineLinkedListNode<LocalSocket> {
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friend class InlineLinkedListNode<LocalSocket>;
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public:
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static NonnullRefPtr<LocalSocket> 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(int) override;
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virtual bool get_local_address(sockaddr*, socklen_t*) override;
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virtual bool 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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uid_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;
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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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