mod_c2s, mod_c2s: Send a whitespace on read timeout, to prod TCP into detecting if the connection died

2 files changed, 14 insertions, 0 deletions

diff --git a/plugins/mod_c2s.lua b/plugins/mod_c2s.lua
index 1d2dd6dd..f9a270c7 100644
--- a/plugins/mod_c2s.lua
+++ b/plugins/mod_c2s.lua
@@ -262,6 +262,13 @@ function listener.ondisconnect(conn, err)
 	end
 end
 
+function listener.onreadtimeout(conn)
+	local session = sessions[conn];
+	if session then
+		return session.send(' ');
+	end
+end
+
 function listener.associate_session(conn, session)
 	sessions[conn] = session;
 end
diff --git a/plugins/mod_s2s/mod_s2s.lua b/plugins/mod_s2s/mod_s2s.lua
index ab5b7232..309940cf 100644
--- a/plugins/mod_s2s/mod_s2s.lua
+++ b/plugins/mod_s2s/mod_s2s.lua
@@ -624,6 +624,13 @@ function listener.ondisconnect(conn, err)
 	end
 end
 
+function listener.onreadtimeout(conn)
+	local session = sessions[conn];
+	if session then
+		return session.sends2s(' ');
+	end
+end
+
 function listener.register_outgoing(conn, session)
 	session.direction = "outgoing";
 	sessions[conn] = session;