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#pragma once
#include <AK/InlineLinkedList.h>
#include <Kernel/DoubleBuffer.h>
#include <Kernel/Net/Socket.h>
class FileDescription;
class LocalSocket final : public Socket, public InlineLinkedListNode<LocalSocket> {
friend class InlineLinkedListNode<LocalSocket>;
public:
static NonnullRefPtr<LocalSocket> create(int type);
virtual ~LocalSocket() override;
static void for_each(Function<void(LocalSocket&)>);
StringView socket_path() const;
String absolute_path(const FileDescription& description) const override;
// ^Socket
virtual KResult bind(const sockaddr*, socklen_t) override;
virtual KResult connect(FileDescription&, const sockaddr*, socklen_t, ShouldBlock = ShouldBlock::Yes) override;
virtual KResult listen(int) override;
virtual bool get_local_address(sockaddr*, socklen_t*) override;
virtual bool get_peer_address(sockaddr*, socklen_t*) override;
virtual void attach(FileDescription&) override;
virtual void detach(FileDescription&) override;
virtual bool can_read(const FileDescription&) const override;
virtual bool can_write(const FileDescription&) const override;
virtual ssize_t sendto(FileDescription&, const void*, size_t, int, const sockaddr*, socklen_t) override;
virtual ssize_t recvfrom(FileDescription&, void*, size_t, int flags, sockaddr*, socklen_t*) override;
private:
explicit LocalSocket(int type);
virtual const char* class_name() const override { return "LocalSocket"; }
virtual bool is_local() const override { return true; }
bool has_attached_peer(const FileDescription&) const;
static Lockable<InlineLinkedList<LocalSocket>>& all_sockets();
DoubleBuffer& buffer_for(FileDescription&);
// An open socket file on the filesystem.
RefPtr<FileDescription> m_file;
// A single LocalSocket is shared between two file descriptions
// on the connect side and the accept side; so we need to store
// an additional role for the connect side and differentiate
// between them.
Role m_connect_side_role { Role::None };
FileDescription* m_connect_side_fd { nullptr };
virtual Role role(const FileDescription& description) const override
{
if (m_connect_side_fd == &description)
return m_connect_side_role;
return m_role;
}
bool m_bound { false };
bool m_accept_side_fd_open { false };
sockaddr_un m_address;
DoubleBuffer m_for_client;
DoubleBuffer m_for_server;
// for InlineLinkedList
LocalSocket* m_prev { nullptr };
LocalSocket* m_next { nullptr };
};
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