Small module that appends SOA for NS queries.

appender.lua

local mod = {}
mod.layer = {
	consume = function (state, req, answer)
		if state == kres.FAIL then
			return state
		end
		answer = kres.pkt_t(answer)
		req = kres.request_t(req)
		if answer:qtype() == kres.type.NS then
			local qry = req:push(answer:qname(), kres.type.SOA, kres.class.IN)
			qry.flags = kres.query.AWAIT_CUT
		end
		return state
	end
}
return mod