From 7f563615fd60936c2fb8d6d2d3d2d3627491e6f2 Mon Sep 17 00:00:00 2001
From: Kim Alvefur <zash@zash.se>
Date: Sun, 7 Oct 2018 03:48:13 +0200
Subject: MUC: Respond to ping per XEP-0410: MUC Self-Ping server optimization
 (closes #1220)

---
 plugins/muc/muc.lib.lua | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/plugins/muc/muc.lib.lua b/plugins/muc/muc.lib.lua
index 4d986457..8e039457 100644
--- a/plugins/muc/muc.lib.lua
+++ b/plugins/muc/muc.lib.lua
@@ -734,6 +734,11 @@ function room_mt:handle_iq_to_occupant(origin, stanza)
 			origin.send(st.error_reply(stanza, "cancel", "item-not-found", "Recipient not in room"));
 			return true;
 		end
+		-- XEP-0410 MUC Self-Ping #1220
+		if to == current_nick and stanza.attr.type == "get" and stanza:get_child("ping", "urn:xmpp:ping") then
+			self:route_stanza(st.reply(stanza));
+			return true;
+		end
 		do -- construct_stanza_id
 			stanza.attr.id = base64.encode(occupant.jid.."\0"..stanza.attr.id.."\0"..md5(from));
 		end
-- 
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