luci-mod-network: 1.2.3.4@iface in DNS Forwards results in "Expecting: valid IP address"

[xtsm]

Is there an existing issue for this?

• I have searched among all existing issues (including closed issues)

screenshots or captures

Actual behaviour

• get an error message in the UI
• enter the same thing in /etc/config/dhcp manually, execute service dnsmasq reload
• dnsmask doesn't crash and seems to be working properly

Expected behaviour

• don't get any errors and be able to save and apply it

Steps to reproduce

• go to network -> dhcp and dns -> forwards
• enter 1.2.3.4@iface in DNS Forwards field

Additional Information

"release": {
		"distribution": "OpenWrt",
		"version": "24.10.2",
		"revision": "r28739-d9340319c6",
		"target": "x86/64",
		"description": "OpenWrt 24.10.2 r28739-d9340319c6",
		"builddate": "1750711236"
	}

What browsers do you see the problem on?

Firefox

Relevant log output

[dave14305]

The string 1.2.3.4@eth1 isn't passing this regex test:

luci/modules/luci-mod-network/htdocs/luci-static/resources/view/network/dhcp.js

Line 190 in 2a3ed43

m = m[2].match(/^([0-9a-f:.]+)(?:%[^#@]+)?(?:#(\d+))?(?:@([0-9a-f:.]+)(?:@[^#]+)?(?:#(\d+))?)?$/);

It seems to be requiring an @<source-ip> before a @<interface> specification.

https://regex101.com/r/DECEtI/1

1.2.3.4@192.168.1.1@eth1 would pass