CC3200-LAUNCHXL: CC3200 Websock handshake request problem

@parth

Part Number: CC3200-LAUNCHXL
Other Parts Discussed in Thread: CC3200

One issue has surfaced on my board wherein i can see very rare the websocket connection is not getting established!

CC3200 board is acting as webserver and IOS enabled device is acting as webclient.

When i debugged further its found that during error case the complete Websock handshake request is not received. So server continues to wait for complete packet and doesn't change the state machine.

Surprisingly the problem exist until i restart the CC3200 LaunchXL board.

Note: Websock camera application of SDK is used.

Can someone guide here? I am planning to use a sniffer next.

over 7 years ago

0 Michael Reymond over 7 years ago

TI__Mastermind 40965 points

Hi @parth,

Where in the code do you observe this failure? Is there an error code that is returned at some point during the failure case?
If this case is rare and caused by a bad handshake, perhaps a timeout can help in recovering from this error.

Please point me to where in the code you see the application is encountering this issue, so that I can examine it further and see what might be causing the issue.

Regards,
Michael

0 @parth over 7 years ago in reply to Michael Reymond

Prodigy 160 points

Hi Michael,

I am trying to reproduce the issue again, will update asap!

Another issue appeared now frequently if stress the system and try to send connect and websock message very fast from IOS device.

FAULT_ISR appears due to "bus fault" but the memory at address 0xE000.ED38 point to 0x00c1dd89(varies) which is invalid memory. How to find the root cause of this? This issue can be easily reproduced!

Reproduction step: websock connect <> disconnect continuously multiple time will result fault.

Can you please share your thoughts!

Regards,
Partha

0 Michael Reymond over 7 years ago in reply to @parth

TI__Mastermind 40965 points

Hi Partha,

For the bus fault error, are you connecting + disconnecting rapidly using the web interface at camera_demo.html? I can't seem to replicate it on my end using the web interface on chrome.

If you haven't done so already, you can try compiling your project while enabling the UART debug interface. By default, the websockets project has the NOTERM symbol defined, which suppresses the UART debug output. If you remove that define, then you'll be able to see debug messages print on the CC3200 COM port, which might help you pinpoint the problem.

Regards,
Michael

0 @parth over 7 years ago in reply to Michael Reymond

Prodigy 160 points

Hi Michael,

Yes the issue is seen on rapid connect disconnect.

Did you enable logs while testing? I am unable to reproduce crash issue with logs enabled.

Is there a possibility if HTTP connection will increase beyond 10 and may result crash?

One observation is that the HTTP connections are not cleared when the

SL_WLAN_STA_DISCONNECTED_EVENT is received!

**********Few more debug and I found **************

Sometime the http max socket limit reaches to 7 and they are not cleared.

Below logs are from gstate: connection reached 7 and due to bad application I guess the complete header didn't reach and stack halts.

Note: IOS library socketstram is used.

/***************************************************************************************************/

g_state struct HttpGlobalState {listenSocket=16,uOpenConnections=7,connections=[{connectionState=WebSocketRequest,dataSocket=...,...,packetRecv=... 0x20032408
listenSocket int 16 0x20032408
uOpenConnections unsigned short 7 0x2003240C
connections struct HttpConnectionData[10] [{connectionState=WebSocketRequest,dataSocket=20,request={uFlags=80,uConnection=...,handler=...,... 0x20032410
  [0] struct HttpConnectionData {connectionState=WebSocketRequest,dataSocket=20,request={uFlags=80,uConnection=0,requestContent=...,handler=... 0x20032410
   connectionState enum HttpConnectionState WebSocketRequest 0x20032410
   dataSocket int 20 0x20032414
   request struct HttpRequest {uFlags=80,uConnection=0,requestContent={uLength=0,pData=0x00000000 {0 '\x00'}}} 0x20032418
   handler enum HttpHandler None 0x20032424
   headerStart unsigned char[320] [151 '\x97',0 '\x00',0 '\x00',151 '\x97',151 '\x97'...] 0x20032425
   uContentLeft unsigned long 0 0x20032568
   timeout unsigned long 0 0x2003256C
   uSavedBufferSize unsigned short 99 0x20032570
   HttpAuth unsigned char 0 '\x00' 0x20032572

Regards,

Partha

0 @parth over 7 years ago in reply to @parth

Prodigy 160 points

Hi Michael,

I am able to capture logs attached here

Fullscreen CC3200_Webserver_logs.txt Download

Binary data

                                                                   
Http accept retry -11
                                                          
Http receive retry -11
                                                         
Http accept retry -11
 
                                                        
                      
                                                        
 Http Client Data received 10
                                                  
Final datablock received 
    
                                                 
Opcode is 9
              
                                                     
Ping received
                                                                  
You were Pinged
                                                                
line: ŠPING 
  
                                                               
Http accept retry -11
                                                          
                      
                                                        
 Http Client Data received 8
                                                   
Final datablock received 
   
                                                  
Opcode is 8
              
                                                     
Client has requested connection to be closed
                                   
line: ˆ1000ok! 
                            
                                  
Close connection

                                                              
                 
                                                             
 Http client socket closed
                                                     
Http accept retry -11
     
                                                    
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Http accept retry -11

                                                         
Accepting new connection number 0 
                                             
                                   
                                           
 Http Client Data received 278
                                                 
line: GET / HTTP/1.1 
         
                                                
method Header: get / http/1.1 
                                                 
line: Origin: ws://192.168.1.77 
                                               
line: Host: 192.168.1.77:80 
    
                                              
line: Sec-WebSocket-Version: 13 
                                               
line: Connection: Upgrade 
      
                                              
line: Upgrade: websocket 
 
                                                    
line: Sec-WebSocket-Key: bGN0bHl3eGRxa21ydGZudg== 
                             
key: line: Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits;
 server_max_window_bits=15 
                                                    
line:  
                    
                                                   
line: HTTP/1.1 101 Web Socket Protocol Handshake
                              
Upgrade: websocket
                                                            
Connection: Upgrade
                                                           
Sec-websocket-accept: /onHx6CW3hKf5M3+CbZLB/xuwW8=
                            
Server: CC3200
                                                                
Access-Control-Allow-Origin: ws://192.168.1.77
                                
Access-Control-Allow-Credentials: true
                                        
Access-Control-Allow-Headers: content-type
                                    
Access-Control-Allow-Headers: authorization
                                   
Access-Control-Allow-Headers: x-websocket-version
                             
Access-Control-Allow-Headers: x-websocket-protocol
                            
Access-Control-Allow-Headers: x-websocket-extensions
                          
                                                      
                        
 
                                                                              
[New Websock connection ] Close old connection  0
                              
[New Websock connection ] New connection handle 0

                             
Http accept retry -11
                            
                             
                      
                                                        
 Http Client Data received 8
                                                   
Final datablock received 
   
                                                  
Opcode is 8
              
                                                     
Client has requested connection to be closed
                                   
line: ˆ1000ok 
                            
                                  
Close connection

                                                              
                 
                                                             
 Http client socket closed
                                                     
Accepting new connection number 0 
                                             
                                   
                                           
 Http Client Data received 278
                                                 
line: GET / HTTP/1.1 
         
                                                
method Header: get / http/1.1 
                                                 
line: Origin: ws://192.168.1.77 
                                               
line: Host: 192.168.1.77:80 
    
                                              
line: Sec-WebSocket-Version: 13 
                                               
line: Connection: Upgrade 
      
                                              
line: Upgrade: websocket 
 
                                                    
line: Sec-WebSocket-Key: c2dvc3NydXdka2t4c3Zxbw== 
                             
key: line: Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits;
 server_max_window_bits=15 
                                                    
line:  
                    
                                                   
line: HTTP/1.1 101 Web Socket Protocol Handshake
                              
Upgrade: websocket
                                                            
Connection: Upgrade
                                                           
Sec-websocket-accept: kw==
                                                    
Server: CC3200
                                                                
Access-Control-Allow-Origin: ws://192.168.1.77
                                
Access-Control-Allow-Credentials: true
                                        
Access-Control-Allow-Headers: content-type
                                    
Access-Control-Allow-Headers: authorization
                                   
Access-Control-Allow-Headers: x-websocket-version
                             
Access-Control-Allow-Headers: x-websocket-protocol
                            
Access-Control-Allow-Headers: x-websocket-extensions
                          
                                                      
                        
 
                                                                              
[New Websock connection ] Close old connection  0
                              
[New Websock connection ] New connection handle 0

                             
Accepting new connection number 1 
               
                             
                                   
                                           
 Http Client close 0
                                                           
Close connection
    
                                                          
                 
                                                             
 Http client socket closed
                                                     
                           
                                                   
 Http Client Data received 278
                                                 
line: GET / HTTP/1.1 
         
                                                
method Header: get / http/1.1 
                                                 
line: Origin: ws://192.168.1.77 
                                               
line: Host: 192.168.1.77:80 
    
                                              
line: Sec-WebSocket-Version: 13 
                                               
line: Connection: Upgrade 
      
                                              
line: Upgrade: websocket 
 
                                                    
line: Sec-WebSocket-Key: bmt1ZHRmbnlscWl0cGRiZw== 
                             
key: line: Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits;
 server_max_window_bits=15 
                                                    
line:  
                    
                                                   
line: HTTP/1.1 101 Web Socket Protocol Handshake
                              
Upgrade: websocket
                                                            
Connection: Upgrade
                                                           
Sec-websocket-accept: q7AsCIIas2Jt+FHJiimu4GM+zAM=
                            
Server: CC3200
                                                                
Access-Control-Allow-Origin: ws://192.168.1.77
                                
Access-Control-Allow-Credentials: true
                                        
Access-Control-Allow-Headers: content-type
                                    
Access-Control-Allow-Headers: authorization
                                   
Access-Control-Allow-Headers: x-websocket-version
                             
Access-Control-Allow-Headers: x-websocket-protocol
                            
Access-Control-Allow-Headers: x-websocket-extensions
                          
                                                      
                        
 
                                                                              
[New Websock connection ] Close old connection  0
                              
[New Websock connection ] New connection handle 1

                             
Http accept retry -11
                            
                             
                      
                                                        
 Http Client Data received 8
                                                   
Final datablock received 
   
                                                  
Opcode is 8
              
                                                     
Client has requested connection to be closed
                                   
line: ˆ1000ok— 
                            
                                  
Close connection

                                                              
                 
                                                             
 Http client socket closed
                                                     
Accepting new connection number 0 
                                             
                                   
                                           
 Http Client Data received 278
                                                 
line: GET / HTTP/1.1 
         
                                                
method Header: get / http/1.1 
                                                 
line: Origin: ws://192.168.1.77 
                                               
line: Host: 192.168.1.77:80 
    
                                              
line: Sec-WebSocket-Version: 13 
                                               
line: Connection: Upgrade 
      
                                              
line: Upgrade: websocket 
 
                                                    
line: Sec-WebSocket-Key: YXJucWdhZWdsdHdieWJiaQ== 
                             
key: line: Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits;
 server_max_window_bits=15 
                                                    
line:  
                    
                                                   
line: HTTP/1.1 101 Web Socket Protocol Handshake
                              
Upgrade: websocket
                                                            
Connection: Upgrade
                                                           
Sec-websocket-accept: 682iRcfBrOIVzI/o53kBp5jwMsM=
                            
Server: CC3200
                                                                
Access-Control-Allow-Origin: ws://192.168.1.77
                                
Access-Control-Allow-Credentials: true
                                        
Access-Control-Allow-Headers: content-type
                                    
Access-Control-Allow-Headers: authorization
                                   
Access-Control-Allow-Headers: x-websocket-version
                             
Access-Control-Allow-Headers: x-websocket-protocol
                            
Access-Control-Allow-Headers: x-websocket-extensions
                          
                                                      
                        
 
                                                                              
[New Websock connection ] Close old connection  1
                              
[New Websock connection ] New connection handle 0

                             
Http accept retry -11
                            
                             
                      
                                                        
 Http Client Data received 8
                                                   
Final datablock received 
   
                                                  
Opcode is 8
              
                                                     
Client has requested connection to be closed
                                   
line: ˆ1000ok 
                            
                                  
Close connection

                                                              
                 
                                                             
 Http client socket closed
                                                     
Accepting new connection number 0 
                                             
                                   
                                           
 Http Client Data received 278
                                                 
line: GET / HTTP/1.1 
         
                                                
method Header: get / http/1.1 
                                                 
line: Origin: ws://192.168.1.77 
                                               
line: Host: 192.168.1.77:80 
    
                                              
line: Sec-WebSocket-Version: 13

. Please check if its helpful to identify the issue.

Which timeout do I need to increase? As it seems endofmarker in header is not received after few header in the packet. The issue exist until I restart the board.

Regards,
Partha

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CC3200-LAUNCHXL: CC3200 Websock handshake request problem