Mask Send Messages

[acidfilez]

Looking at the websocket message transfer:

sudo tcpdump -A -s0 -ilo0 port 8687

I can see that my IOS app using SRWebSocket mask my messages (frames).

But node.js/websocket.io doesnt mask and send normaly.

For example, IOS to Node:

21:29:16.412636 IP localhost.52317 > localhost.8687: Flags [P.], seq 391:484, ack 130, win 9178, options [nop,nop,TS val 1143337638 ecr 1143337638], length 93
E...S.@.@............]!.T.W.......#........
D%..D%[email protected][email protected]...W.@[email protected]......

But Node to IOS:
21:29:16.418444 IP localhost.8687 > localhost.52317: Flags [P.], seq 130:229, ack 484, win 9156, options [nop,nop,TS val 1143337643 ecr 1143337638], length 99
E...AC@.@...........!..]....T.X"..#........
D%..D%...a{"type":"user","action":"reload","for_user":7}

I can see the json.

Any how to mask the messages that goes out of websocket.io ?

Thanks.

PS: BTW I saw how IOS mask the frames..