From: Vladimír Čunát <vladimir.cunat@nic.cz>
Date: Wed, 14 Aug 2019 15:16:58 +0000 (+0200)
Subject: modules/ta_signal_query: optimize
X-Git-Tag: v4.3.0~4^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0e76c9dd2a6d8764d1ba927c8f94cc580f0f7fd;p=thirdparty%2Fknot-resolver.git

modules/ta_signal_query: optimize

Basically the same as the parent commit (just much simpler).
---

diff --git a/modules/ta_signal_query/ta_signal_query.lua b/modules/ta_signal_query/ta_signal_query.lua
index d1945c7e7..081d7982d 100644
--- a/modules/ta_signal_query/ta_signal_query.lua
+++ b/modules/ta_signal_query/ta_signal_query.lua
@@ -50,10 +50,13 @@ local function send_ta_query(domain)
 end
 
 -- act on DNSKEY queries which were not answered from cache
-function M.layer.consume(state, req, _)
-	local qry = req:current()
-	if qry.stype == kres.type.DNSKEY and not qry.flags.CACHED then
-		send_ta_query(qry:name())
+function M.layer.consume(state, req, pkt)
+	-- First check for standard "cached packets": PKT_SIZE_NOWIRE, for efficiency.
+	if pkt.size ~= -1 and pkt:qtype() == kres.type.DNSKEY then
+		local qry = req:current()
+		if not qry.flags.CACHED then
+			send_ta_query(qry:name())
+		end
 	end
 	return state  -- do not interfere with normal query processing
 end