AF_XDP support is a recent technology introduced that aims at improving
capture performance. With this update, Suricata now provides a new
capture source 'af-xdp' that attaches an eBPF program to the network
interface card. Packets received in the NIC queue are forwarded to
a RX ring in user-space, bypassing the Linux network stack.
Note, there is a configuration option (force-xdp-mode) that forces the
packet through the normal Linux network stack.
libxdp and libbpf is required for this feature and is compile time
configured.
This capture source operates on single and multi-queue NIC's via
suricata.yaml. Here, various features can be enabled, disabled
or edited as required by the use case.
This feature currently only supports receiving packets via AF_XDP,
no TX support has been developed.
Ticket: https://redmine.openinfosecfoundation.org/issues/3306
Additional reading:
https://www.kernel.org/doc/html/latest/networking/af_xdp.html
Use the lzma-rs crate for decompressing swf/lzma files instead of
the lzma decompressor in libhtp. This decouples suricata from libhtp
except for actual http parsing, and means libhtp no longer has to
export a lzma decompression interface.
Ticket: #5638
Fuzzing highlighted an issue where a command sequence on the same file
id triggered a logging issue:
file data for id N
close id N
file data for id N
If this happened in a single blob of data passed to the parser, the
existing file tx would be reused, the file "reopened", confusing the
file logging logic. This would trigger a debug assert.
This patch makes sure a new file tx is created for the file data
coming in after the first file tx is closed.
Bug: #5567.
In lossy streams, esp where TcpSession::lossy_be_liberal it is possible
to end up inserting a segment that is out of the expected sequence
number bounds.
While updating the destination pointer, we were also adding the padded
bytes which are not a part of the decoded bytes. This led to running out
of space on the destination buffer.
Fix it by only incrementing destination buffer ptr by the number of
actual bytes that were decoded.
Ticket 5623
All the GitHub CI jobs run as root inside a container. This means the
testing is done in a different environment than a developer typically
uses, running as a user.
Add a job that does the build as a non-root user.
It was not enough to set Cursor position to 0,
also its inner Vec should be cleared.
This way, a new input gets written at the beginning of the
Cursor and its inner Vec...
Ticket: #5691
Suricata already logs if AF_PACKET or Netmap are running in a mixed IPS
and IDS/TAP mode. As the behavior is undefined when these modes are
mixed, it is best to deprecate and to not allow this behavior. For now
warn that it will be unsupported and fail in Suricata 8.
Ticket: 5587
Instead of returning on the first line that fails to parse, log the
error and continue instead of returning.
The fail fast makes sense in test mode, but not in a normal run mode
where you don't want one bad line to abort processing the whole file.
This will still fail out in test mode.
Related issue: 4554
Issue: 2982
This commit moves bsize validation with respect to content matches to
the post-parse validation stage. This allows bsize to consider all
content-related values, including those that follow the bsize keyword.