This rule will only inspect the data portion of SMB1 frames. It will not affect
any other protocol, and it won't need special patterns to "search" for the
SMB1 frame in the raw stream.
Victor Julien [Fri, 3 Dec 2021 06:40:56 +0000 (07:40 +0100)]
app/frames: initial support
The idea of stream frames is that the applayer parsers can tag PDUs and
other arbitrary frames in the stream while parsing. These frames can then
be inspected from the rule language. This will allow rules that are more
precise and less costly.
The frames are stored per direction in the `AppLayerParserState` and will only
be initialized when actual frames are in use. The per direction storage has a
fixed size static portion and dynamic support for a larger number. This is done
for effeciency.
When the Stream Buffer slides, frames are updated as they use offsets relative
to the stream. A negative offset is used for frames that started before the
current window.
Frames have events to inspect/log parser errors that don't fit the TX model.
Frame id starts at 1. So implementations can keep track of frame ids where 0
is not set.
Frames affect TCP window sliding. The frames keep a "left edge" which
signifies how much data to keep for frames that are still in progress.
Victor Julien [Thu, 13 Jan 2022 11:13:43 +0000 (12:13 +0100)]
stream: fix stream pruning being too aggressive
Pruning of StreamBufferBlocks could remove blocks that fell entirely
after the target offset due to a logic error. This could lead to data
being evicted that was still meant to be processed in theapp-layer
parsers.
Jeff Lucovsky [Sun, 26 Dec 2021 15:22:34 +0000 (10:22 -0500)]
detect: Avoid recomputing ntohl() in addr match
This commit makes a small optimization when comparing IPv4 and IPv6
addresses by making the host order value invariant and calculating the
value once, before entering the loop.
Jason Ish [Fri, 17 Dec 2021 22:32:05 +0000 (16:32 -0600)]
rust/derive: make usable from a plugin or lib user
The macro was generating code that references names use the "crate"
prefix which will fail if the macro is used by a library user or plugin.
Dynamically check where we are running an use the correct import paths
as needed.
Jason Ish [Fri, 17 Dec 2021 22:28:56 +0000 (16:28 -0600)]
rust: rename to suricata (from suricata_rust)
Rename the Rust lib to simply "suricata" instead of "suricata_rust".
This allows Rust plugin/library code to use it under the name "suricata"
which is what should be expected.
The name was only "suricata_rust" to prevent on-disk conflict with the C
code, so just rename the file on disk, which doesn't affect how the code
is interacted with from an API layer.
Jason Ish [Fri, 17 Dec 2021 22:25:47 +0000 (16:25 -0600)]
rust: remove feature function-macro
The function macro existed so it would only be enabled on Rust
versions that supported. Now that our MSRV is 1.41, which is
greater than 1.38 we can assume we always have support for
this macro.
Jason Ish [Thu, 24 Jun 2021 16:20:09 +0000 (10:20 -0600)]
jsonbuilder: add methods to encode values as base64
Add new methods to set a value as a base64 encoded string of
a byte array. This uses the Rust base64 crate and encodes
directly into the JsonBuilder buffer with no intermediate
buffer required.
jb_set_base64: set a field on an object
jb_append_base64: append a value to an array
Jeff Lucovsky [Thu, 17 Jun 2021 13:07:29 +0000 (09:07 -0400)]
logging/diag: Enable stacktrace diagnostic if config'd
This commit adds a signal handler for SIGSEGV when configured. The
signal handler emits a one line stack trace using SCLogError. The intent
is to provide diagnostic information in deployments where core files are
not possible.
The diagnostic message is from the offending thread and includes the
stack trace; each frame includes the symbol + offset.
Jeff Lucovsky [Thu, 17 Jun 2021 13:04:56 +0000 (09:04 -0400)]
logging: Stacktrace on signal term setting
This commit adds a configuration setting to enable a stack trace message
if Suricata receives a signal that terminates execution, such as
SIGSEGV, SIGABRT.
Many places were still referencing the old Suricata page.
Used git grep with replace to update them. Checked that new links work.
Left old references when they were only documentation examples (for
output or unittests).
Philippe Antoine [Wed, 22 Dec 2021 21:44:54 +0000 (22:44 +0100)]
detect: fix app-layer-protocol keyword for HTTP
Ticket: 4920
Completes commit c8dbe24fb6202550bbca1fab452ddbe864b2c9e2
which introduced AppProtoEquals to have a generic
check for http in signature can mean http1 or http2 in
traffic.
This commit missed this case, as I only looked for
git grep "alproto ==" and here we deal with
alproto_tc and alproto_ts, but not alproto by itself.
Jason Ish [Tue, 21 Dec 2021 22:34:05 +0000 (16:34 -0600)]
dns: create transaction even if z-bit was set
It appears that DNS servers will still process a DNS request even if the
z-bit is set, our parser will fail the transaction. So create the
transaction, but still set the event.
Lukas Sismis [Mon, 22 Nov 2021 15:43:29 +0000 (16:43 +0100)]
dpdk/ixgbe: setup RSS for Intel IXGBE PMD
Set RSS hash function according to Intel IXGBE PMD available hash functions.
During configuration, a warning appeared stating that RSS hash function
has been changed from one value to the other. This has meant that
the supported hash functions did not cover all required hash functions
by the configuration. This commit solves the warning.
Lukas Sismis [Sun, 21 Nov 2021 22:22:24 +0000 (23:22 +0100)]
dpdk/i40e: support RSS on Intel i40e PMD driver
Due to peculiar behavior of i40e PMD driver, the RSS is required to be set
via rte_flow rules or a hash filter as compared to other NICs where RSS is
configured through port configuration structure.
RTE_FLOW rules are created on 5-tuples (as opposed to 3-tuple configured
on the other NICs). Fragmented traffic have been tested with this setup
and it has been proven that fragmented packets of the same flow are
received on the same queue. At the same time, setting 3-tuple on rte_flow
rules have not yield in the expected results.
Notes from the experiments:
- Configuration of 5-tuple (as is in the commit):
fragmented and nonfragmented packets are received by the same workers
even when I applied seed to alter them via tcpreplay-edit (option --seed)
- Setting only ETH_RSS_FRAG_IPV4 and ETH_RSS_IPV4 (i.e. setting 3-tuple):
when setting ETH_RSS_IPV4, the PMD driver says that pctype is not
supported (generally this means that the "type" of traffic is not
a valid configuration for the i40e)
- Setting only ETH_RSS_FRAG_IPV4 and ETH_RSS_NONFRAG_IPV4_OTHER:
this doesn't work well, packets of the same flow are received on
the different workers (my explanation is that the fragmented packets are
matched with ETH_RSS_FRAG_IPV4 but the other UDP packets are not matched
with ETH_RSS_NONFRAG_IPV4_OTHER rte_flow rule (they would be matched with
ETH_RSS_NONFRAG_IPV4_UDP).
Lukas Sismis [Sun, 21 Nov 2021 22:18:36 +0000 (23:18 +0100)]
dpdk: initial support with workers runmode
Register a new runmode - DPDK. This enables a new flag on Suricata start
(--dpdk).
With the flag given, DPDK runmode is enabled.
Runmode loads the configuration and then initializes EAL.
If successful, it configures the physical NICs according to the configuration
file. After that, worker threads are initialized and then are in continuous
receive loop.