[Bug]: Validation for IPv6 doesn't work

[WGOS]

🐛 Describe the Bug

I am unable to add or remove IPv6 addresses or routes from Managed Routes or IP Assignment menus though this is clearly a supported feature when interacting with controller via API.

It's also impossible to delete any routes (including IPv4) if there are IPv6 routes presented

🔍 Steps to Reproduce

Managed routes

1. Go to menu
2. Click a "plus" sign
3. Enter a IPv6 route
4. Click Add

IP assignments

1. Go to menu
2. Click Advanced
3. Add a IPv6 range
4. Click Submit

🔧 Deployment Type

• Docker
• Standalone

✨ Expected Behavior

Both of those menus should validate IPv6 successfully as it is supported by ZeroTier Central, ZeroTier Controller API and ztcui where I migrated from

📋 ZTNET Logs

No response

🖼 Screenshots

The error I get when interacting with menus

[WGOS]

Apparently it seems to be the issue with this method

I do think this is caused by a lack of distinction between v4 and v6 at lines 97 and 98. The variable is set by the same method for both addresses, which will return true if the address is v4 or v6. So, if the address is v4 or v6, the method will always go for the branch if(isIPv4) at line 101 and check prefixNumber as if it was v4, even if an IPv6 CIDR is supplied

[WGOS]

Just tested #465 and it works just fine in both menus

[WGOS]

This should also help with #463

[sinamics]

You are absolutely right, the previous code did not work as intended.
Thank you for the PR, it looks fine to me.