wsgo fuzzing client - Case 6.4.1 : Fail - 4002 ms @ 2025-03-31T15:47:12.774Z
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 differ from any expected.
Expected:
{'OK': [('timeout', 'A')], 'NON-STRICT': [('timeout', 'A'), ('timeout', 'B')]}
Observed:
[('message', u'\u03ba\u1f79\u03c3\u03bc\u03b5', False), ('timeout', 'A'), ('timeout', 'B')]
Case Closing Behavior
The connection was failed by the wrong endpoint (FAILED)
GET / HTTP/1.1 User-Agent: AutobahnTestSuite/0.8.2-0.10.9 Host: localhost:8080 Upgrade: WebSocket Connection: Upgrade Pragma: no-cache Cache-Control: no-cache Sec-WebSocket-Key: 0zEAwuDQKbrQilLDt6E3Gw== Sec-WebSocket-Version: 13
HTTP/1.1 101 Switching Protocols Connection: Upgrade Sec-Websocket-Accept: 5bAxNbGFxI9p9hwDZGJW0FkVnUE= Upgrade: websocket
| Key | Value | Description |
| isServer | False | 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 | True | 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 | False | True, iff full WebSocket closing handshake was performed (close frame sent and received) _and_ the server dropped the TCP (which is its responsibility). |
| wasNotCleanReason | peer did not respond (in time) in closing handshake | 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 | True | When we initiated a closing handshake, but the peer did not respond in time, this gets True. |
| localCloseCode | 1001 | The close code I sent in close frame (if any). |
| localCloseReason | Going Away | The close reason I sent in close frame (if any). |
| remoteCloseCode | None | 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 |
| 13 | 1 | 13 |
| 129 | 1 | 129 |
| Total | 2 | 142 |
| Chop Size | Count | Octets |
| 10 | 1 | 10 |
| 12 | 1 | 12 |
| 17 | 1 | 17 |
| 18 | 1 | 18 |
| 240 | 1 | 240 |
| Total | 5 | 297 |
| Opcode | Count |
| 1 | 1 |
| Total | 1 |
| Opcode | Count |
| 0 | 2 |
| 1 | 1 |
| 8 | 1 |
| Total | 4 |
000 TX OCTETS: 474554202f20485454502f312e310d0a557365722d4167656e743a204175746f6261686e5465737453756974652f302e382e
322d302e31302e390d0a486f7374 ...
001 RX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a436f6e6e656374696f6e3a2055706772
6164650d0a5365632d576562736f ...
002 TX FRAME : OPCODE=1, FIN=False, RSV=0, PAYLOAD-LEN=11, MASK=4f455226, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
κόσμε
003 TX OCTETS: 018b4f45522681ffb39bf68ad1e8f38be7
004 DELAY 1.000000 sec for TAG A
005 RX OCTETS: 810bcebae1bdb9cf83cebcceb5
006 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=11, MASKED=False, MASK=None
κόσμε
007 DELAY TIMEOUT on TAG A
008 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=4, MASK=402e1712, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xf4908080
009 TX OCTETS: 0084402e1712b4be9792
010 DELAY 1.000000 sec for TAG B
011 DELAY TIMEOUT on TAG B
012 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=6, MASK=ce276418, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
edited
013 TX OCTETS: 8086ce276418ab430d6cab43
014 FAIL CONNECTION AFTER 1.000000 sec
015 FAILING CONNECTION
016 TX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=12, MASK=0f84cf40, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0x03e9476f696e672041776179
017 TX OCTETS: 888c0f84cf400c6d882f66eaa8604ef3ae39
018 TCP DROPPED BY ME