websock secure server - Case 5.20 : Pass - 1003 ms @ 2026-08-25T04:35:43.569Z
Case Description
Same as Case 5.19, but send all frames with SYNC = True.
Note, this does not change the octets sent in any way, only how the stream
is chopped up on the wire.
Case Expectation
Same as Case 5.19. Implementations must be agnostic to how
octet stream is chopped up on wire (must be TCP clean).
Case Outcome
Actual events match at least one expected.
Expected:
{'OK': [('pong', u'pongme 1!'), ('pong', u'pongme 2!'), ('message', u'fragment1fragment2fragment3fragment4fragment5', False)]}
Observed:
[('pong', u'pongme 1!'), ('pong', u'pongme 2!'), ('message', u'fragment1fragment2fragment3fragment4fragment5', False)]
Case Closing Behavior
The spec requires the connection to be failed cleanly here (UNCLEAN)
GET /wss HTTP/1.1 User-Agent: AutobahnTestSuite/25.10.1-0.10.9 Host: 127.0.0.1:8889 Upgrade: WebSocket Connection: Upgrade Pragma: no-cache Cache-Control: no-cache Sec-WebSocket-Key: wws6qL9EYE/BQ3Lt8QBNVQ== Sec-WebSocket-Version: 13
HTTP/1.1 101 Switching Protocols Date: Tue, 25 Aug 2026 04:35:43 GMT Upgrade: websocket Connection: Upgrade Sec-Websocket-Accept: jr7ri/f0+s6ktfMHxQGfNTGBGNA=
| Key | Value | Description |
| isServer | False | True, iff I (the fuzzer) am a server, and the peer is a client. |
| closedByMe | True | True, iff I have initiated closing handshake (that is, did send close first). |
| failedByMe | False | True, iff I have failed the WS connection (i.e. due to protocol error). Failing can be either by initiating closing handshake or brutal drop TCP. |
| droppedByMe | False | True, iff I dropped the TCP connection. |
| wasClean | False | True, iff full WebSocket closing handshake was performed (close frame sent and received) _and_ the server dropped the TCP (which is its responsibility). |
| wasNotCleanReason | peer dropped the TCP connection without previous WebSocket closing handshake | When wasClean == False, the reason what happened. |
| wasServerConnectionDropTimeout | False | When we are a client, and we expected the server to drop the TCP, but that didn't happen in time, this gets True. |
| wasOpenHandshakeTimeout | False | When performing the opening handshake, but the peer did not finish in time, this gets True. |
| wasCloseHandshakeTimeout | False | When we initiated a closing handshake, but the peer did not respond in time, this gets True. |
| localCloseCode | 1000 | The close code I sent in close frame (if any). |
| localCloseReason | None | The close reason I sent in close frame (if any). |
| remoteCloseCode | None | The close code the peer sent me in close frame (if any). |
| remoteCloseReason | None | The close reason the peer sent me in close frame (if any). |
| Chop Size | Count | Octets |
| 11 | 2 | 22 |
| 47 | 1 | 47 |
| 166 | 1 | 166 |
| Total | 4 | 235 |
| Chop Size | Count | Octets |
| 8 | 1 | 8 |
| 15 | 7 | 105 |
| 245 | 1 | 245 |
| Total | 9 | 358 |
| Opcode | Count |
| 1 | 1 |
| 10 | 2 |
| Total | 3 |
| Opcode | Count |
| 0 | 4 |
| 1 | 1 |
| 8 | 1 |
| 9 | 2 |
| Total | 8 |
000 TX OCTETS: 474554202f77737320485454502f312e310d0a557365722d4167656e743a204175746f6261686e5465737453756974652f32
352e31302e312d302e31302e390d ...
001 RX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a446174653a205475652c203235204175
6720323032362030343a33353a34 ...
002 TX FRAME : OPCODE=1, FIN=False, RSV=0, PAYLOAD-LEN=9, MASK=2e433c88, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=True
fragment1
003 TX OCTETS: 01892e433c8848315def432652fc1f
004 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=9, MASK=bf50629f, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=True
fragment2
005 TX FRAME : OPCODE=9, FIN=True, RSV=0, PAYLOAD-LEN=9, MASK=67984b41, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=True
pongme 1!
006 DELAY 1.000000 sec for TAG None
007 TX OCTETS: 0089bf50629fd92203f8d2350ceb8d
008 TX OCTETS: 898967984b4117f725260afd6b7046
009 RX OCTETS: 8a09706f6e676d65203121
010 RX FRAME : OPCODE=10, FIN=True, RSV=0, PAYLOAD-LEN=9, MASKED=False, MASK=None
pongme 1!
011 DELAY TIMEOUT on TAG None
012 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=9, MASK=1bc94042, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=True
fragment3
013 TX OCTETS: 00891bc940427dbb212576ac2e3628
014 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=9, MASK=f914528a, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=True
fragment4
015 TX FRAME : OPCODE=9, FIN=True, RSV=0, PAYLOAD-LEN=9, MASK=93a7137b, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=True
pongme 2!
016 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=9, MASK=2043541a, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=True
fragment5
017 CLOSE CONNECTION AFTER 1.000000 sec
018 TX OCTETS: 0089f914528a9f6633ed94713cfecd
019 TX OCTETS: 898993a7137be3c87d1cfec23349b2
020 TX OCTETS: 80892043541a4631357d4d263a6e15
021 RX OCTETS: 8a09706f6e676d65203221
022 RX FRAME : OPCODE=10, FIN=True, RSV=0, PAYLOAD-LEN=9, MASKED=False, MASK=None
pongme 2!
023 RX OCTETS: 812d667261676d656e7431667261676d656e7432667261676d656e7433667261676d656e7434667261676d656e7435
024 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=45, MASKED=False, MASK=None
fragment1fragment2fragment3fragment4fragment5
025 TX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=2, MASK=67676626, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0x03e8
026 TX OCTETS: 888267676626648f
027 TCP DROPPED BY PEER