# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1626592084 -7200
# Node ID 0a8671f32424b72289d6be0166407a6a3ed0fae6
# Parent  e57c5d9c722cefe46a9b48b3935df6bc8b1ebe4d
mod_s2s: Guard against missing 'to' on incoming stream

Given an incoming <stream:stream from="example.com"> this line would
have mistakenly reported the 'from' as the local host. Neither are
technically required and may be missing, especially on connections used
only for Dialback.

Outgoing connections initiated by Prosody always have 'from_host' and
'to_host', so it is safer to check it this way.

diff -r e57c5d9c722c -r 0a8671f32424 plugins/mod_s2s.lua
--- a/plugins/mod_s2s.lua	Sun Jul 18 08:53:37 2021 +0200
+++ b/plugins/mod_s2s.lua	Sun Jul 18 09:08:04 2021 +0200
@@ -614,7 +614,7 @@
 		end
 	end
 
-	local this_host = session.direction == "incoming" and session.to_host or session.from_host
+	local this_host = session.direction == "outgoing" and session.from_host or session.to_host
 
 	if reason then -- nil == no err, initiated by us, false == initiated by remote
 		local stream_error;