tcp_socket

# File lib/net/imap.rb, line 1131
    def tcp_socket(host, port)
      Socket.tcp(host, port, :connect_timeout => @open_timeout)
    rescue Errno::ETIMEDOUT
      raise Net::OpenTimeout, "Timeout to open TCP connection to " +
        "#{host}:#{port} (exceeds #{@open_timeout} seconds)"
    end