Websocket Server module

Based on RFC6455

                 -------------------
dataRecv() ---->|                   |<----- status()
state() ------->|                   |<----- result()
                |                   |<----- dataSend()
                 -------------------

• dataRecv() : data received from network (handshake or data frame)
• status() : what to do with result after processing (i.e send to network, send to application ...)
• result() : result after processing
• dataSend() : data to be encoded before sent to network
• state() : state of connection (readyState see websocket API)
• sendPing() : Application send PING
• sendClose() : Application send CLOSE

status:

• 0 Nothing to do
• 1 HandShake OK to network
• 2 HandShake NOK to network
• 3 Data (frame encoded) to network
• 4 Pong (After receiving a Ping) to network
• 5 Close (After receiving close) to network
• 8 Data (frame decoded) to application