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

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

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: 474554202f72756e436173653f636173653d3734266167656e743d777320485454502f312e310d0a486f73743a206c6f6361

               6c686f73743a393030310d0a5573 ...

001 TX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a5365727665723a204175746f6261686e

               5465737453756974652f302e382e ...

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 DELAY TIMEOUT on TAG B

010 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=6, MASK=None, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False

               edited

011 TX OCTETS: 8006656469746564

012 FAIL CONNECTION AFTER 1.000000 sec

013 RX OCTETS: 889d53dc17e6503317e653dc17e653dc17e653dc17e653dc17e653dc17e653dc17e653

014 RX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=29, MASKED=True, MASK=3533646331376536

               0x03ef000000000000000000000000000000000000000000000000000000

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

               0x03e8

016 TX OCTETS: 880203e8

017 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 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	1007	The close code the peer sent me in close frame (if any).
remoteCloseReason		The close reason the peer sent me in close frame (if any).

Chop Size	Count	Octets
35	1	35
209	1	209
Total	2	244