Autobahn WebSocket Testsuite Report
Autobahn WebSocket

stratus@2 - Case 5.17 : Fail - 1001 ms @ 2026-04-02T15:18:06.961Z

Case Description

Repeated 2x: Continuation Frame with FIN = true (where there is nothing to continue), then text Message fragmented into 2 fragments.

Case Expectation

The connection is failed immediately, since there is no message to continue.

Case Outcome

Actual events differ from any expected.

Expected:
{'OK': []}

Observed:
[('message', u'fragment2fragment3', False), ('message', u'fragment2fragment3', False)]

Case Closing Behavior

The connection was failed by the wrong endpoint (FAILED)



Opening Handshake

GET /runCase?case=61&agent=stratus%402 HTTP/1.1
host: 127.0.0.1:9001
upgrade: websocket
connection: upgrade
sec-websocket-key: bYRgTeWoW4QkVHnfVsN1ow==
sec-websocket-version: 13
sec-websocket-extensions: permessage-deflate
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: ns5fEZvPibGzKKwNyxEXljPKTXQ=


Closing Behavior

KeyValueDescription
isServerTrueTrue, iff I (the fuzzer) am a server, and the peer is a client.
closedByMeTrueTrue, iff I have initiated closing handshake (that is, did send close first).
failedByMeTrueTrue, 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.
droppedByMeFalseTrue, iff I dropped the TCP connection.
wasCleanFalseTrue, iff full WebSocket closing handshake was performed (close frame sent and received) _and_ the server dropped the TCP (which is its responsibility).
wasNotCleanReasonpeer dropped the TCP connection without previous WebSocket closing handshakeWhen wasClean == False, the reason what happened.
wasServerConnectionDropTimeoutFalseWhen we are a client, and we expected the server to drop the TCP, but that didn't happen in time, this gets True.
wasOpenHandshakeTimeoutFalseWhen performing the opening handshake, but the peer did not finish in time, this gets True.
wasCloseHandshakeTimeoutFalseWhen we initiated a closing handshake, but the peer did not respond in time, this gets True.
localCloseCode1001The close code I sent in close frame (if any).
localCloseReasonGoing AwayThe close reason I sent in close frame (if any).
remoteCloseCodeNoneThe close code the peer sent me in close frame (if any).
remoteCloseReasonNoneThe close reason the peer sent me in close frame (if any).


Wire Statistics

Octets Received by Chop Size

Chop SizeCountOctets
24248
2321232
Total3280

Octets Transmitted by Chop Size

Chop SizeCountOctets
11666
14114
2081208
Total8288

Frames Received by Opcode

OpcodeCount
12
Total2

Frames Transmitted by Opcode

OpcodeCount
04
12
81
Total7


Wire Log

000 RX OCTETS: 474554202f72756e436173653f636173653d3631266167656e743d737472617475732534303220485454502f312e310d0a68
               6f73743a203132372e302e302e31 ...
001 TX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a5365727665723a204175746f6261686e
               5465737453756974652f32352e31 ...
002 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=9, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               fragment1
003 TX OCTETS: 8009667261676d656e7431
004 TX FRAME : OPCODE=1, FIN=False, RSV=0, PAYLOAD-LEN=9, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               fragment2
005 TX OCTETS: 0109667261676d656e7432
006 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=9, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               fragment3
007 TX OCTETS: 8009667261676d656e7433
008 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=9, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               fragment1
009 TX OCTETS: 8009667261676d656e7431
010 TX FRAME : OPCODE=1, FIN=False, RSV=0, PAYLOAD-LEN=9, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               fragment2
011 TX OCTETS: 0109667261676d656e7432
012 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=9, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               fragment3
013 TX OCTETS: 8009667261676d656e7433
014 FAIL CONNECTION AFTER 1.000000 sec
015 RX OCTETS: 8192d07e2628b60c474fbd1b485ce2185449b7134346a44d
016 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=18, MASKED=True, MASK=6430376532363238
               fragment2fragment3
017 RX OCTETS: 81925f34fe4c39469f2b325190386d528c2d38599b222b07
018 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=18, MASKED=True, MASK=3566333466653463
               fragment2fragment3
019 FAILING CONNECTION
020 TX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=12, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0x03e9476f696e672041776179
021 TX OCTETS: 880c03e9476f696e672041776179
022 TCP DROPPED BY PEER