zeek/testing
Robin Sommer 6fbebc5e94
Fixing productive connections with missing SYN still considered partial after flipping direction.
In https://github.com/zeek/zeek/pull/2191, we added endpoint flipping
for cases where a connection starts with a SYN/ACK followed by ACK or
data. The goal was to treat the connection as productive and go ahead
and parse it. But the TCP analyzer could continue to consider it
partial after flipping, meaning that app layers would bail out. #2426
shows such a case: HTTP gets correctly activated after flipping
through content inspection, but it won't process anything because
`IsPartial()` returns true. As the is-partial state reflects
whether we saw the first packets each in direction, this patch now
overrides that state for the originally missing SYN after flipping.

We actually had the same problem at a couple of other locations already
as well. One of that only happened to work because of the originally
inconsistent state flipping that was fixed in the previous commit. The
corresponding unit test now broke after that change. This commit
updates that logic as well to override the state.

This fix is a bit of a hack, but the best solution I could think of
without introducing larger changes.

Closes #2426.
2022-11-16 09:56:51 +01:00
..
benchmark/broker Port Zeek to latest Broker API 2022-04-27 23:02:27 +02:00
btest Fixing productive connections with missing SYN still considered partial after flipping direction. 2022-11-16 09:56:51 +01:00
coverage Format shell scripts with shfmt. 2021-11-24 23:13:02 +01:00
external Update external test hashes 2022-11-02 16:38:24 -07:00
scripts Include in Jan's AF_PACKET plugin as builtin plugin 2022-10-13 13:29:27 +02:00
.gitignore
CMakeLists.txt Install Zeek's btest tooling with the distribution 2021-03-11 13:00:15 -08:00
Makefile
README

This directory contains suites for testing for Zeek's correct
operation:

    btest/
        An ever-growing set of small unit tests testing Zeek's
        functionality.

    external/
        A framework for downloading additional test sets that run more
        complex Zeek configuration on larger traces files. Due to their
        size, these are not included directly. See the README for more
        information. 

    scripts/
        Helpers scripts used by some tests.