static IP configuration (eth and wireless) have hardcoded /24 subnet

[NickHibma]

/volumio/app/plugins/system_controller/network/index.js hardcodes the subnet to a /24 for both eth0 and wireless network setups. It ignores both subnet settings from the UI.

It requires a UI change to change a subnet setting to a net prefix setting. The subnet mask is not used anywhere else, so this is the easiest solution.

We use a /22 on our ships for the management network, so being able to set the subnet is needed.

[volumio]

What would be the logic then?
Can you provide a subnet for each prefix to set?

[NickHibma]

/22 means the first 22 bits in the netmask are set. This post in StackOverflow explains how to do it in Javascript:

function subnet2Mask(subnet) {
  return subnet
    .split('.')
    .reduce((nbb, byte) => (
      [...Array(8).reverse().keys()]
        .reduce((nb, i) => (nb + ((byte >> i) & 1)), nbb)), 0)
}


function mask2Subnet(val) {
  return [255, 255, 255, 255]
    .map(() => [...Array(8).keys()]
      .reduce((rst) => (rst * 2 + (val-- > 0)), 0))
    .join('.')
}

Or you could have the user enter the prefix number ('22') instead of the netmask ('255.255.252.0').

[volumio]

@NickHibma would you be comfortable in doing a Pull Request to add this functionality?

[NickHibma]

Nope, I am not very proficient in Javascript.