Autobahn WebSocket Testsuite Report
Autobahn WebSocket

websock server - Case 6.3.2 : Pass - 1 ms @ 2026-01-07T13:35:09.934Z

Case Description

Send invalid UTF-8 text message in fragments of 1 octet, resulting in frames ending on positions which are not code point ends.

MESSAGE:
cebae1bdb9cf83cebcceb5eda080656469746564

Case Expectation

The connection is failed immediately, since the payload is not valid UTF-8.

Case Outcome

Actual events match at least one expected.

Expected:
{'OK': []}

Observed:
[]

Case Closing Behavior

Connection was properly closed (OK)



Opening Handshake

GET /ws HTTP/1.1
User-Agent: AutobahnTestSuite/25.10.1-0.10.9
Host: 127.0.0.1:8888
Upgrade: WebSocket
Connection: Upgrade
Pragma: no-cache
Cache-Control: no-cache
Sec-WebSocket-Key: W+hfQCjfv9CbolwoHEjOhQ==
Sec-WebSocket-Version: 13
HTTP/1.1 101 Switching Protocols
Date: Wed, 07 Jan 2026 13:35:09 GMT
Upgrade: websocket
Connection: Upgrade
Sec-Websocket-Accept: IY9Q4Ag0XetXKg6YM/+9HfeR00s=


Closing Behavior

KeyValueDescription
isServerFalseTrue, iff I (the fuzzer) am a server, and the peer is a client.
closedByMeFalseTrue, iff I have initiated closing handshake (that is, did send close first).
failedByMeFalseTrue, 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.
localCloseCodeNoneThe close code I sent in close frame (if any).
localCloseReasonNoneThe 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
1661166
Total1166

Octets Transmitted by Chop Size

Chop SizeCountOctets
616
720140
2441244
Total22390

Frames Received by Opcode

OpcodeCount
Total0

Frames Transmitted by Opcode

OpcodeCount
020
11
Total21


Wire Log

000 TX OCTETS: 474554202f777320485454502f312e310d0a557365722d4167656e743a204175746f6261686e5465737453756974652f3235
               2e31302e312d302e31302e390d0a ...
001 RX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a446174653a205765642c203037204a61
               6e20323032362031333a33353a30 ...
002 TX FRAME : OPCODE=1, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=f327d98e, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xce
003 TX OCTETS: 0181f327d98e3d
004 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=bf0bcedb, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xba
005 TX OCTETS: 0081bf0bcedb05
006 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=6e935b87, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xe1
007 TX OCTETS: 00816e935b878f
008 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=76757bd6, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xbd
009 TX OCTETS: 008176757bd6cb
010 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=1354fa0a, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xb9
011 TX OCTETS: 00811354fa0aaa
012 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=f7f67e14, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xcf
013 TX OCTETS: 0081f7f67e1438
014 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=2e351efc, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0x83
015 TX OCTETS: 00812e351efcad
016 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=7d4b4149, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xce
017 TX OCTETS: 00817d4b4149b3
018 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=a6e186c1, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xbc
019 TX OCTETS: 0081a6e186c11a
020 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=db6810a7, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xce
021 TX OCTETS: 0081db6810a715
022 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=b65466eb, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xb5
023 TX OCTETS: 0081b65466eb03
024 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=a773cd9a, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xed
025 TX OCTETS: 0081a773cd9a4a
026 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=6c645ef0, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0xa0
027 TX OCTETS: 00816c645ef0cc
028 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=ae37111b, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               0x80
029 TX OCTETS: 0081ae37111b2e
030 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=567b161f, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               e
031 TX OCTETS: 0081567b161f33
032 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=68f1a87f, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               d
033 TX OCTETS: 008168f1a87f0c
034 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=5a20dc84, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               i
035 TX OCTETS: 00815a20dc8433
036 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=8907480d, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               t
037 TX OCTETS: 00818907480dfd
038 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=6e07b4b3, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               e
039 TX OCTETS: 00816e07b4b30b
040 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=cccfbbad, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
               d
041 TX OCTETS: 0081cccfbbada8
042 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=0, MASK=d84839b3, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
043 TX OCTETS: 8080d84839b3
044 FAIL CONNECTION AFTER 1.000000 sec
045 TCP DROPPED BY PEER