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-rw-r--r--plugins/mod_websocket.lua1
1 files changed, 1 insertions, 0 deletions
diff --git a/plugins/mod_websocket.lua b/plugins/mod_websocket.lua
index 386a4d60..101039e1 100644
--- a/plugins/mod_websocket.lua
+++ b/plugins/mod_websocket.lua
@@ -223,6 +223,7 @@ function handle_request(event)
return;
elseif opcode == 0x9 then -- Ping frame
frame.opcode = 0xA;
+ frame.MASK = false; -- Clients send masked frames, servers don't, see #1484
conn:write(build_frame(frame));
return "";
elseif opcode == 0xA then -- Pong frame, MAY be sent unsolicited, eg as keepalive