Websocket handshake response not forwarded from TCP to client

Posted by Saharsh on Super User See other posts from Super User or by Saharsh
Published on 2014-06-08T07:53:15Z Indexed on 2014/06/08 9:29 UTC
Read the original article Hit count: 186

I am trying to create a websocket server. I can see the websocket client's opening handhshake. My response to it is received by the client laptop (I can see this on wireshark). So the TCP connection has been established. But the client (a chrome websocket client extension) does not receive the handshake packet. What could be a possible reason for TCP to not forward the handshake to the client or for the client to not be able to read the TCP message?

Client handshake:

GET HTTP/1.1
Upgrade: websocket
Connection:Upgrade
Cache-Control:no-cache
Host:192.168.0.101
Origin:http://www.websocket.org
Pragma:no-cache
Sec-WebSocket-Extensions:permessage-deflate; client_max_window_bits, x-webkit-deflate-frame
Sec-WebSocket-Key: qrmw/m+BoZije6h9HYKmVw==
Sec-WebSocket-Version:13
Upgrade:websocket

Server Response:

HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Accept: jj1g5Io57m9ks8cme3jkbyo2asc=
Access-Control-Allow-Origin: http://www.websocket.org
Server: xyz
Sec-WebSocket-Extensions: 

Thanks!

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