From aa602d57688607475e3ba37d73df7f8742ca5cdc Mon Sep 17 00:00:00 2001
From: Kim Alvefur <zash@zash.se>
Date: Sun, 6 Oct 2019 21:14:53 +0200
Subject: mod_s2s: Close with a stream error in case neither SASL or Dialback
 are available

This both tells the remote server and users who sent any queued stanzas
why it failed.
---
 plugins/mod_s2s/mod_s2s.lua | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/plugins/mod_s2s/mod_s2s.lua b/plugins/mod_s2s/mod_s2s.lua
index 41b1875bd..b9c13ef26 100644
--- a/plugins/mod_s2s/mod_s2s.lua
+++ b/plugins/mod_s2s/mod_s2s.lua
@@ -184,7 +184,10 @@ function module.add_host(module)
 			return true;
 		elseif not session.dialback_verifying then
 			session.log("warn", "No SASL EXTERNAL offer and Dialback doesn't seem to be enabled, giving up");
-			session:close();
+			session:close({
+					condition = "unsupported-feature",
+					text = "No viable authentication method offered",
+				});
 			return false;
 		end
 	end, -1);
-- 
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