Endian Convertion for structures without knowing data type(s)

Question

Currently, I tend to avoid using floating point variables when sending data. The reason for the same is that when I send packets from say a linux PC to a windows PC, due to the endian conversion, I find the data to no longer be readable. See https://stackoverflow.com/a/2945186/5906375

My current code structure converts the data from one endian format to the other before figuring out the packet structure. Basically something like this :

swapEndianFormat(&input);
messageId = getMessageId(input);
switch(messageId)
{
    case "......":
    ...

}

Anyways, so my current function works well for all data types except floating point.

Also, while I have found functions for swapping for floating point variables, I am looking for a generic function where I could just pump the byteArray of the structure and get the converted data which supports unsigned short, int as well as float. That or could someone confirm if it is even possible.

Thanks