}

// isUsingMultipathTCP reports whether MPTCP is still being used.
//
// Please look at the description of hasFallenBack (kernel >=5.16) and
// isUsingMPTCPProto methods for more details about what is being checked here.
func isUsingMultipathTCP(fd *netFD) bool {
	if hasSOLMPTCP {
		return !hasFallenBack(fd)
	}

	return isUsingMPTCPProto(fd)