[FS#4197] dnsmasq fails to start when using IPv6 address for bogusnxdomain

[OpenWrt Bugs]

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A new Flyspray task has been opened.  Details are below. 

User who did this - fotvoren (fotvoren) 

Attached to Project - OpenWrt/LEDE Project
Summary - dnsmasq fails to start when using IPv6 address for bogusnxdomain
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - openwrt-21.02
Due in Version - Undecided
Due Date - Undecided
Details - OpenWrt version: 21.02.1 r16325-88151b8303 / LuCI openwrt-21.02 branch git-21.295.67054-13df80d
dnsmasq version: 2.85-8

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When setting an IPv6 address for the bogusnxdomain option in dnsmasq, the server fails to start. IPv6 addresses should be supported. From the [[https://thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html|dnsmasq manpage]]:
-B, --bogus-nxdomain=[/prefix]
Transform replies which contain the specified address or subnet into "No such domain" replies.
IPv4 and IPv6 are supported.

When setting an IPv6 address like this:


config dnsmasq
	...
	list bogusnxdomain '2606:4700:4700::1111'
	...


The server will fail to start:


Mon Dec 20 11:33:39 2021 daemon.crit dnsmasq[17019]: error at line 25 of /var/etc/dnsmasq.conf.cfg01411c
Mon Dec 20 11:33:39 2021 daemon.crit dnsmasq[17019]: FAILED to start up
Mon Dec 20 11:33:39 2021 daemon.info procd: Instance dnsmasq::cfg01411c s in a crash loop 7 crashes, 0 seconds since last crash


Line 25 of /var/etc/dnsmasq.conf.cfg01411c:

bogus-nxdomain=2606:4700:4700::1111

IPv4 addresses work fine.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=4197

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