tokio-websockets - Case 7.1.6 : Informational - 7 ms @ 2026-07-12T13:05:12.957Z
Case Description
Send 256K message followed by close then a ping
Case Expectation
Case outcome depends on implementation defined close behavior. Message and close frame are sent back to back. If the close frame is processed before the text message write is complete (as can happen in asynchronous processing models) the close frame is processed first and the text message may not be received or may only be partially received.
Case Outcome
Actual events differ from any expected.
Expected:
{'OK': [('message', u'Hello World!', False)], 'NON-STRICT': []}
Observed:
[('message', u'BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd ...', False), ('message', u'Hello World!', False)]
Case Closing Behavior
Connection was properly closed (INFORMATIONAL)
GET /runCase?case=215&agent=tokio-websockets HTTP/1.1 Host: localhost:9001 Upgrade: websocket Connection: Upgrade Sec-WebSocket-Key: 7pi44jPZe1Y1zJ9JmIndhQ== Sec-WebSocket-Version: 13
HTTP/1.1 101 Switching Protocols Server: AutobahnTestSuite/25.10.1-0.10.9 X-Powered-By: AutobahnPython/0.10.9 Upgrade: WebSocket Connection: Upgrade Sec-WebSocket-Accept: rxcbFuUFIVIGocG3tN7j/UfJTj8=
| Key | Value | Description |
| isServer | True | 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 | True | True, iff I dropped the TCP connection. |
| wasClean | True | True, iff full WebSocket closing handshake was performed (close frame sent and received) _and_ the server dropped the TCP (which is its responsibility). |
| wasNotCleanReason | None | 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 | 1000 | 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 |
| 40 | 1 | 40 |
| 192 | 1 | 192 |
| 65536 | 4 | 262144 |
| Total | 6 | 262376 |
| Chop Size | Count | Octets |
| 2 | 1 | 2 |
| 4 | 1 | 4 |
| 14 | 1 | 14 |
| 208 | 1 | 208 |
| 262154 | 1 | 262154 |
| Total | 5 | 262382 |
| Opcode | Count |
| 1 | 2 |
| 8 | 1 |
| Total | 3 |
| Opcode | Count |
| 1 | 2 |
| 8 | 1 |
| 9 | 1 |
| Total | 4 |
000 RX OCTETS: 474554202f72756e436173653f636173653d323135266167656e743d746f6b696f2d776562736f636b65747320485454502f
312e310d0a486f73743a206c6f63 ...
001 TX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a5365727665723a204175746f6261686e
5465737453756974652f32352e31 ...
002 TX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=10, MASK=None, PAYLOAD-REPEAT-LEN=262144, CHOPSIZE=None, SYNC=False
BAsd7&jh23
003 TX OCTETS: 817f00000000000400004241736437266a6832334241736437266a6832334241736437266a6832334241736437266a683233
4241736437266a68323342417364 ...
004 TX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=12, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
Hello World!
005 TX OCTETS: 810c48656c6c6f20576f726c6421
006 TX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=2, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0x03e8
007 TX OCTETS: 880203e8
008 TX FRAME : OPCODE=9, FIN=True, RSV=0, PAYLOAD-LEN=0, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
009 TX OCTETS: 8900
010 FAIL CONNECTION AFTER 1.000000 sec
011 RX OCTETS: 81ff0000000000040000e45020bca61153d8d3764ad4d66362fd9734179a8e38128fa61153d8d3764ad4d66362fd9734179a
8e38128fa61153d8d3764ad4d663 ...
012 RX OCTETS: 53d8d3764ad4d66362fd9734179a8e38128fa61153d8d3764ad4d66362fd9734179a8e38128fa61153d8d3764ad4d66362fd
9734179a8e38128fa61153d8d376 ...
013 RX OCTETS: 128fa61153d8d3764ad4d66362fd9734179a8e38128fa61153d8d3764ad4d66362fd9734179a8e38128fa61153d8d3764ad4
d66362fd9734179a8e38128fa611 ...
014 RX OCTETS: 179a8e38128fa61153d8d3764ad4d66362fd9734179a8e38128fa61153d8d3764ad4d66362fd9734179a8e38128fa61153d8
d3764ad4d66362fd9734179a8e38 ...
015 RX OCTETS: 62fd9734179a8e38128fa61153d8818cb2cc4dd5faa921b9ddec1abac0a029f4888265fc043b6614
016 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=262144, MASKED=True, MASK=6534353032306263
BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd ...
017 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=12, MASKED=True, MASK=6232636334646435
Hello World!
018 RX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=2, MASKED=True, MASK=3635666330343362
0x03e8
019 TCP DROPPED BY ME