This reworks the parser such that COM_CHANGE_USER switches the
connection back into the CONNECTION_PHASE so that we can remove the
EXPECT_AUTH_SWITCH special case in the COMMAND_PHASE. Adds two pcaps
produced with Python that actually do COM_CHANGE_USER as it seems
not possible from the MySQL CLI.
Pcap was generated as follows. Doesn't seem wireshark even parses
this properly right now.
with common.get_connection() as c:
with c.cursor() as cur:
date1 = datetime.date(1987, 10, 18)
datetime1 = datetime.datetime(1990, 9, 26, 12, 13, 14)
cur.add_attribute("number1", 42)
cur.add_attribute("string1", "a string")
cur.add_attribute("date1", date1)
cur.add_attribute("datetime1", datetime1)
cur.execute("SELECT version()")
result = cur.fetchall()
print("result", result)
Not sure this adds much more coverage then there was, but minimally
more recent software versions.
The instances/passwords were ephemeral, so hostname and password hashes
etc aren't useful to anyone.
We were parsing MySQL using bigendian even though the protocol is
specified as with "least significant byte first" [1]. This is most
problematic when parsing length encoded strings with 2 byte length
fields...
Further, I think, the EOF_Packet parsing was borked, either due to
testing the CLIENT_DEPRECATE_EOF with the wrong endianness, or due to
the workaround in Resultset processing raising mysql_ok(). Introduce a
new mysql_eof() that triggers for EOF_Packet's and remove the fake
mysql_ok() Resultset invocation to fix. Adapt the mysql script and tests
to account for the new event.
This is a quite backwards incompatible change on the event level, but
due to being quite buggy in general, doubt this matters to many.
I think there is more buried, but this fixes the violation of the simple
"SHOW ENGINE INNODB STATUS" and the existing tests continue to
succeed...
[1] https://dev.mysql.com/doc/dev/mysql-server/latest/page_protocol_basic_dt_integers.html
