--- Socket.open(domain, type, protocol)
--- Socket.new(domain, type, protocol)

    åȤޤdomaintype
    protocol ϥ󥯥롼ɥեˤǻꤷ
    ۤȤɤ Socket::AF_INET Τ褦 
    Socket 饹ȤƤޤdomain 
    type ˴ؤƤϡ"AF_INET",
    "SOCK_STREAM" Τ褦ʸǤǤޤʸ
    Ǥ٤ƤεǽǤݾڤϤޤ

