Case Description

Send invalid UTF-8 text message in 3 fragments (frames). First frame payload is valid, then wait, then 2nd frame which contains the payload making the sequence invalid, then wait, then 3rd frame with rest. Note that PART1 and PART3 are valid UTF-8 in themselves, PART2 is a 0x110000 encoded as in the UTF-8 integer encoding scheme, but the codepoint is invalid (out of range).

MESSAGE PARTS:
PART1 = cebae1bdb9cf83cebcceb5
PART2 = f4908080
PART3 = 656469746564

Case Expectation

The first frame is accepted, we expect to timeout on the first wait. The 2nd frame should be rejected immediately (fail fast on UTF-8). If we timeout, we expect the connection is failed at least then, since the complete message payload is not valid UTF-8.

Case Outcome

Actual events match at least one expected.

Expected:
{'NON-STRICT': [('timeout', 'A'), ('timeout', 'B')], 'OK': [('timeout', 'A')]}

Observed:
[('timeout', 'A')]

Opening Handshake

Closing Behavior

Wire Statistics

Octets Received by Chop Size

Octets Transmitted by Chop Size

Frames Received by Opcode

Frames Transmitted by Opcode

Wire Log

000 RX OCTETS: 474554202f72756e436173653f636173653d3734266167656e743d5377696674576562536f636b657420485454502f312e31

               0d0a486f73743a206c6f63616c68 ...

001 TX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a5365727665723a204175746f6261686e

               5465737453756974652f302e372e ...

002 TX FRAME : OPCODE=1, FIN=False, RSV=0, PAYLOAD-LEN=11, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False

               κόσμε

003 TX OCTETS: 010bcebae1bdb9cf83cebcceb5

004 DELAY 1.000000 sec for TAG A

005 DELAY TIMEOUT on TAG A

006 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=4, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False

               0xf4908080

007 TX OCTETS: 0004f4908080

008 DELAY 1.000000 sec for TAG B

009 RX OCTETS: 888fcb072618c8e87679b26b4979af27436ab96854

010 RX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=15, MASKED=True, MASK=6362303732363138

               0x03ef5061796c6f6164206572726f72

011 TX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=2, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False

               0x03e8

012 TX OCTETS: 880203e8

013 TCP DROPPED BY ME

Key	Value	Description
isServer	True	True, iff I (the fuzzer) am a server, and the peer is a client.
closedByMe	False	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 WebSockets 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	1007	The close code the peer sent me in close frame (if any).
remoteCloseReason	Payload error	The close reason the peer sent me in close frame (if any).

Chop Size	Count	Octets
21	1	21
283	1	283
Total	2	304