code: def n2l(c, l):
      "network to host long"
      l = U32(c[0] << 24)
      l = l | (U32(c[1]) << 16)
      l = l | (U32(c[2]) << 8)
      l = l | (U32(c[3]))
      return f n2l(c, l):
      "network to host long"
      l = U32(c[0] << 24)
      l = l | (U32(c[1]) << 16)
      l = l | (U32(c[2]) << 8)
      l = l | (U32(c[3]))
      return l
docs: network to host long